1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * thinkpad_acpi.c - ThinkPad ACPI Extras
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 */
8
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10
11 #define TPACPI_VERSION "0.26"
12 #define TPACPI_SYSFS_VERSION 0x030000
13
14 /*
15 * Changelog:
16 * 2007-10-20 changelog trimmed down
17 *
18 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
19 * drivers/misc.
20 *
21 * 2006-11-22 0.13 new maintainer
22 * changelog now lives in git commit history, and will
23 * not be updated further in-file.
24 *
25 * 2005-03-17 0.11 support for 600e, 770x
26 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
27 *
28 * 2005-01-16 0.9 use MODULE_VERSION
29 * thanks to Henrik Brix Andersen <brix@gentoo.org>
30 * fix parameter passing on module loading
31 * thanks to Rusty Russell <rusty@rustcorp.com.au>
32 * thanks to Jim Radford <radford@blackbean.org>
33 * 2004-11-08 0.8 fix init error case, don't return from a macro
34 * thanks to Chris Wright <chrisw@osdl.org>
35 */
36
37 #include <linux/acpi.h>
38 #include <linux/backlight.h>
39 #include <linux/bitops.h>
40 #include <linux/delay.h>
41 #include <linux/dmi.h>
42 #include <linux/fb.h>
43 #include <linux/freezer.h>
44 #include <linux/hwmon.h>
45 #include <linux/hwmon-sysfs.h>
46 #include <linux/init.h>
47 #include <linux/input.h>
48 #include <linux/jiffies.h>
49 #include <linux/kernel.h>
50 #include <linux/kthread.h>
51 #include <linux/leds.h>
52 #include <linux/list.h>
53 #include <linux/lockdep.h>
54 #include <linux/module.h>
55 #include <linux/mutex.h>
56 #include <linux/nvram.h>
57 #include <linux/pci.h>
58 #include <linux/platform_device.h>
59 #include <linux/platform_profile.h>
60 #include <linux/power_supply.h>
61 #include <linux/proc_fs.h>
62 #include <linux/rfkill.h>
63 #include <linux/sched.h>
64 #include <linux/sched/signal.h>
65 #include <linux/seq_file.h>
66 #include <linux/slab.h>
67 #include <linux/string.h>
68 #include <linux/string_helpers.h>
69 #include <linux/sysfs.h>
70 #include <linux/types.h>
71 #include <linux/uaccess.h>
72 #include <linux/workqueue.h>
73
74 #include <acpi/battery.h>
75 #include <acpi/video.h>
76
77 #include <drm/drm_privacy_screen_driver.h>
78
79 #include <sound/control.h>
80 #include <sound/core.h>
81 #include <sound/initval.h>
82
83 #include "dual_accel_detect.h"
84
85 /* ThinkPad CMOS commands */
86 #define TP_CMOS_VOLUME_DOWN 0
87 #define TP_CMOS_VOLUME_UP 1
88 #define TP_CMOS_VOLUME_MUTE 2
89 #define TP_CMOS_BRIGHTNESS_UP 4
90 #define TP_CMOS_BRIGHTNESS_DOWN 5
91 #define TP_CMOS_THINKLIGHT_ON 12
92 #define TP_CMOS_THINKLIGHT_OFF 13
93
94 /* NVRAM Addresses */
95 enum tp_nvram_addr {
96 TP_NVRAM_ADDR_HK2 = 0x57,
97 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
98 TP_NVRAM_ADDR_VIDEO = 0x59,
99 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
100 TP_NVRAM_ADDR_MIXER = 0x60,
101 };
102
103 /* NVRAM bit masks */
104 enum {
105 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
106 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
107 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
108 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
109 TP_NVRAM_MASK_THINKLIGHT = 0x10,
110 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
111 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
112 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
113 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
114 TP_NVRAM_MASK_MUTE = 0x40,
115 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
116 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
117 TP_NVRAM_POS_LEVEL_VOLUME = 0,
118 };
119
120 /* Misc NVRAM-related */
121 enum {
122 TP_NVRAM_LEVEL_VOLUME_MAX = 14,
123 };
124
125 /* ACPI HIDs */
126 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
127 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
128 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268"
129 #define TPACPI_ACPI_EC_HID "PNP0C09"
130
131 /* Input IDs */
132 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
133 #define TPACPI_HKEY_INPUT_VERSION 0x4101
134
135 /* ACPI \WGSV commands */
136 enum {
137 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
138 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
139 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
140 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
141 };
142
143 /* TP_ACPI_WGSV_GET_STATE bits */
144 enum {
145 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
146 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
147 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
148 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
149 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
150 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
151 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
152 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
153 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
154 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
155 };
156
157 /* HKEY events */
158 enum tpacpi_hkey_event_t {
159 /* Hotkey-related */
160 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
161 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
162 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
163 TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */
164 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
165 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
166 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
167 TP_HKEY_EV_PRIVACYGUARD_TOGGLE = 0x130f, /* Toggle priv.guard on/off */
168 TP_HKEY_EV_AMT_TOGGLE = 0x131a, /* Toggle AMT on/off */
169
170 /* Reasons for waking up from S3/S4 */
171 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
172 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
173 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
174 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
175 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
176 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
177
178 /* Auto-sleep after eject request */
179 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
180 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
181
182 /* Misc bay events */
183 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
184 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
185 or port replicator */
186 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
187 dock or port replicator */
188 /*
189 * Thinkpad X1 Tablet series devices emit 0x4012 and 0x4013
190 * when keyboard cover is attached, detached or folded onto the back
191 */
192 TP_HKEY_EV_KBD_COVER_ATTACH = 0x4012, /* keyboard cover attached */
193 TP_HKEY_EV_KBD_COVER_DETACH = 0x4013, /* keyboard cover detached or folded back */
194
195 /* User-interface events */
196 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
197 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
198 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
199 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
200 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016):
201 * enter/leave tablet mode
202 */
203 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
204 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
205 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
206
207 /* Key-related user-interface events */
208 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
209 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
210 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */
211
212 /* Thermal events */
213 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
214 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
215 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
216 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
217 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* windows; thermal table changed */
218 TP_HKEY_EV_THM_CSM_COMPLETED = 0x6032, /* windows; thermal control set
219 * command completed. Related to
220 * AML DYTC */
221 TP_HKEY_EV_THM_TRANSFM_CHANGED = 0x60F0, /* windows; thermal transformation
222 * changed. Related to AML GMTS */
223
224 /* AC-related events */
225 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */
226
227 /* Further user-interface events */
228 TP_HKEY_EV_PALM_DETECTED = 0x60b0, /* palm hoveres keyboard */
229 TP_HKEY_EV_PALM_UNDETECTED = 0x60b1, /* palm removed */
230
231 /* Misc */
232 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
233 };
234
235 /****************************************************************************
236 * Main driver
237 */
238
239 #define TPACPI_NAME "thinkpad"
240 #define TPACPI_DESC "ThinkPad ACPI Extras"
241 #define TPACPI_FILE TPACPI_NAME "_acpi"
242 #define TPACPI_URL "http://ibm-acpi.sf.net/"
243 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
244
245 #define TPACPI_PROC_DIR "ibm"
246 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
247 #define TPACPI_DRVR_NAME TPACPI_FILE
248 #define TPACPI_DRVR_SHORTNAME "tpacpi"
249 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
250
251 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
252 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
253
254 #define TPACPI_MAX_ACPI_ARGS 3
255
256 /* Debugging printk groups */
257 #define TPACPI_DBG_ALL 0xffff
258 #define TPACPI_DBG_DISCLOSETASK 0x8000
259 #define TPACPI_DBG_INIT 0x0001
260 #define TPACPI_DBG_EXIT 0x0002
261 #define TPACPI_DBG_RFKILL 0x0004
262 #define TPACPI_DBG_HKEY 0x0008
263 #define TPACPI_DBG_FAN 0x0010
264 #define TPACPI_DBG_BRGHT 0x0020
265 #define TPACPI_DBG_MIXER 0x0040
266
267 #define FAN_NOT_PRESENT 65535
268
269 /****************************************************************************
270 * Driver-wide structs and misc. variables
271 */
272
273 struct ibm_struct;
274
275 struct tp_acpi_drv_struct {
276 const struct acpi_device_id *hid;
277 struct acpi_driver *driver;
278
279 void (*notify) (struct ibm_struct *, u32);
280 acpi_handle *handle;
281 u32 type;
282 struct acpi_device *device;
283 };
284
285 struct ibm_struct {
286 char *name;
287
288 int (*read) (struct seq_file *);
289 int (*write) (char *);
290 void (*exit) (void);
291 void (*resume) (void);
292 void (*suspend) (void);
293 void (*shutdown) (void);
294
295 struct list_head all_drivers;
296
297 struct tp_acpi_drv_struct *acpi;
298
299 struct {
300 u8 acpi_driver_registered:1;
301 u8 acpi_notify_installed:1;
302 u8 proc_created:1;
303 u8 init_called:1;
304 u8 experimental:1;
305 } flags;
306 };
307
308 struct ibm_init_struct {
309 char param[32];
310
311 int (*init) (struct ibm_init_struct *);
312 umode_t base_procfs_mode;
313 struct ibm_struct *data;
314 };
315
316 /* DMI Quirks */
317 struct quirk_entry {
318 bool btusb_bug;
319 };
320
321 static struct quirk_entry quirk_btusb_bug = {
322 .btusb_bug = true,
323 };
324
325 static struct {
326 u32 bluetooth:1;
327 u32 hotkey:1;
328 u32 hotkey_mask:1;
329 u32 hotkey_wlsw:1;
330 enum {
331 TP_HOTKEY_TABLET_NONE = 0,
332 TP_HOTKEY_TABLET_USES_MHKG,
333 TP_HOTKEY_TABLET_USES_GMMS,
334 } hotkey_tablet;
335 u32 kbdlight:1;
336 u32 light:1;
337 u32 light_status:1;
338 u32 bright_acpimode:1;
339 u32 bright_unkfw:1;
340 u32 wan:1;
341 u32 uwb:1;
342 u32 fan_ctrl_status_undef:1;
343 u32 second_fan:1;
344 u32 second_fan_ctl:1;
345 u32 beep_needs_two_args:1;
346 u32 mixer_no_level_control:1;
347 u32 battery_force_primary:1;
348 u32 input_device_registered:1;
349 u32 platform_drv_registered:1;
350 u32 sensors_pdrv_registered:1;
351 u32 hotkey_poll_active:1;
352 u32 has_adaptive_kbd:1;
353 u32 kbd_lang:1;
354 struct quirk_entry *quirks;
355 } tp_features;
356
357 static struct {
358 u16 hotkey_mask_ff:1;
359 u16 volume_ctrl_forbidden:1;
360 } tp_warned;
361
362 struct thinkpad_id_data {
363 unsigned int vendor; /* ThinkPad vendor:
364 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
365
366 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
367 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
368
369 u32 bios_model; /* 1Y = 0x3159, 0 = unknown */
370 u32 ec_model;
371 u16 bios_release; /* 1ZETK1WW = 0x4b31, 0 = unknown */
372 u16 ec_release;
373
374 char *model_str; /* ThinkPad T43 */
375 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
376 };
377 static struct thinkpad_id_data thinkpad_id;
378
379 static enum {
380 TPACPI_LIFE_INIT = 0,
381 TPACPI_LIFE_RUNNING,
382 TPACPI_LIFE_EXITING,
383 } tpacpi_lifecycle;
384
385 static int experimental;
386 static u32 dbg_level;
387
388 static struct workqueue_struct *tpacpi_wq;
389
390 enum led_status_t {
391 TPACPI_LED_OFF = 0,
392 TPACPI_LED_ON,
393 TPACPI_LED_BLINK,
394 };
395
396 /* tpacpi LED class */
397 struct tpacpi_led_classdev {
398 struct led_classdev led_classdev;
399 int led;
400 };
401
402 /* brightness level capabilities */
403 static unsigned int bright_maxlvl; /* 0 = unknown */
404
405 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
406 static int dbg_wlswemul;
407 static bool tpacpi_wlsw_emulstate;
408 static int dbg_bluetoothemul;
409 static bool tpacpi_bluetooth_emulstate;
410 static int dbg_wwanemul;
411 static bool tpacpi_wwan_emulstate;
412 static int dbg_uwbemul;
413 static bool tpacpi_uwb_emulstate;
414 #endif
415
416
417 /*************************************************************************
418 * Debugging helpers
419 */
420
421 #define dbg_printk(a_dbg_level, format, arg...) \
422 do { \
423 if (dbg_level & (a_dbg_level)) \
424 printk(KERN_DEBUG pr_fmt("%s: " format), \
425 __func__, ##arg); \
426 } while (0)
427
428 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
429 #define vdbg_printk dbg_printk
430 static const char *str_supported(int is_supported);
431 #else
str_supported(int is_supported)432 static inline const char *str_supported(int is_supported) { return ""; }
433 #define vdbg_printk(a_dbg_level, format, arg...) \
434 do { if (0) no_printk(format, ##arg); } while (0)
435 #endif
436
tpacpi_log_usertask(const char * const what)437 static void tpacpi_log_usertask(const char * const what)
438 {
439 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
440 what, task_tgid_vnr(current));
441 }
442
443 #define tpacpi_disclose_usertask(what, format, arg...) \
444 do { \
445 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
446 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
447 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
448 what, task_tgid_vnr(current), ## arg); \
449 } \
450 } while (0)
451
452 /*
453 * Quirk handling helpers
454 *
455 * ThinkPad IDs and versions seen in the field so far are
456 * two or three characters from the set [0-9A-Z], i.e. base 36.
457 *
458 * We use values well outside that range as specials.
459 */
460
461 #define TPACPI_MATCH_ANY 0xffffffffU
462 #define TPACPI_MATCH_ANY_VERSION 0xffffU
463 #define TPACPI_MATCH_UNKNOWN 0U
464
465 /* TPID('1', 'Y') == 0x3159 */
466 #define TPID(__c1, __c2) (((__c1) << 8) | (__c2))
467 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3))
468 #define TPVER TPID
469
470 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
471 { .vendor = PCI_VENDOR_ID_IBM, \
472 .bios = TPID(__id1, __id2), \
473 .ec = TPACPI_MATCH_ANY, \
474 .quirks = (__quirk) }
475
476 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
477 { .vendor = PCI_VENDOR_ID_LENOVO, \
478 .bios = TPID(__id1, __id2), \
479 .ec = TPACPI_MATCH_ANY, \
480 .quirks = (__quirk) }
481
482 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \
483 { .vendor = PCI_VENDOR_ID_LENOVO, \
484 .bios = TPID3(__id1, __id2, __id3), \
485 .ec = TPACPI_MATCH_ANY, \
486 .quirks = (__quirk) }
487
488 #define TPACPI_QEC_IBM(__id1, __id2, __quirk) \
489 { .vendor = PCI_VENDOR_ID_IBM, \
490 .bios = TPACPI_MATCH_ANY, \
491 .ec = TPID(__id1, __id2), \
492 .quirks = (__quirk) }
493
494 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
495 { .vendor = PCI_VENDOR_ID_LENOVO, \
496 .bios = TPACPI_MATCH_ANY, \
497 .ec = TPID(__id1, __id2), \
498 .quirks = (__quirk) }
499
500 struct tpacpi_quirk {
501 unsigned int vendor;
502 u32 bios;
503 u32 ec;
504 unsigned long quirks;
505 };
506
507 /**
508 * tpacpi_check_quirks() - search BIOS/EC version on a list
509 * @qlist: array of &struct tpacpi_quirk
510 * @qlist_size: number of elements in @qlist
511 *
512 * Iterates over a quirks list until one is found that matches the
513 * ThinkPad's vendor, BIOS and EC model.
514 *
515 * Returns 0 if nothing matches, otherwise returns the quirks field of
516 * the matching &struct tpacpi_quirk entry.
517 *
518 * The match criteria is: vendor, ec and bios much match.
519 */
tpacpi_check_quirks(const struct tpacpi_quirk * qlist,unsigned int qlist_size)520 static unsigned long __init tpacpi_check_quirks(
521 const struct tpacpi_quirk *qlist,
522 unsigned int qlist_size)
523 {
524 while (qlist_size) {
525 if ((qlist->vendor == thinkpad_id.vendor ||
526 qlist->vendor == TPACPI_MATCH_ANY) &&
527 (qlist->bios == thinkpad_id.bios_model ||
528 qlist->bios == TPACPI_MATCH_ANY) &&
529 (qlist->ec == thinkpad_id.ec_model ||
530 qlist->ec == TPACPI_MATCH_ANY))
531 return qlist->quirks;
532
533 qlist_size--;
534 qlist++;
535 }
536 return 0;
537 }
538
tpacpi_is_lenovo(void)539 static inline bool __pure __init tpacpi_is_lenovo(void)
540 {
541 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
542 }
543
tpacpi_is_ibm(void)544 static inline bool __pure __init tpacpi_is_ibm(void)
545 {
546 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
547 }
548
549 /****************************************************************************
550 ****************************************************************************
551 *
552 * ACPI Helpers and device model
553 *
554 ****************************************************************************
555 ****************************************************************************/
556
557 /*************************************************************************
558 * ACPI basic handles
559 */
560
561 static acpi_handle root_handle;
562 static acpi_handle ec_handle;
563
564 #define TPACPI_HANDLE(object, parent, paths...) \
565 static acpi_handle object##_handle; \
566 static const acpi_handle * const object##_parent __initconst = \
567 &parent##_handle; \
568 static char *object##_paths[] __initdata = { paths }
569
570 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
571 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
572
573 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
574 /* T4x, X31, X40 */
575 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
576 "\\CMS", /* R40, R40e */
577 ); /* all others */
578
579 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
580 "^HKEY", /* R30, R31 */
581 "HKEY", /* all others */
582 ); /* 570 */
583
584 /*************************************************************************
585 * ACPI helpers
586 */
587
acpi_evalf(acpi_handle handle,int * res,char * method,char * fmt,...)588 static int acpi_evalf(acpi_handle handle,
589 int *res, char *method, char *fmt, ...)
590 {
591 char *fmt0 = fmt;
592 struct acpi_object_list params;
593 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
594 struct acpi_buffer result, *resultp;
595 union acpi_object out_obj;
596 acpi_status status;
597 va_list ap;
598 char res_type;
599 int success;
600 int quiet;
601
602 if (!*fmt) {
603 pr_err("acpi_evalf() called with empty format\n");
604 return 0;
605 }
606
607 if (*fmt == 'q') {
608 quiet = 1;
609 fmt++;
610 } else
611 quiet = 0;
612
613 res_type = *(fmt++);
614
615 params.count = 0;
616 params.pointer = &in_objs[0];
617
618 va_start(ap, fmt);
619 while (*fmt) {
620 char c = *(fmt++);
621 switch (c) {
622 case 'd': /* int */
623 in_objs[params.count].integer.value = va_arg(ap, int);
624 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
625 break;
626 /* add more types as needed */
627 default:
628 pr_err("acpi_evalf() called with invalid format character '%c'\n",
629 c);
630 va_end(ap);
631 return 0;
632 }
633 }
634 va_end(ap);
635
636 if (res_type != 'v') {
637 result.length = sizeof(out_obj);
638 result.pointer = &out_obj;
639 resultp = &result;
640 } else
641 resultp = NULL;
642
643 status = acpi_evaluate_object(handle, method, ¶ms, resultp);
644
645 switch (res_type) {
646 case 'd': /* int */
647 success = (status == AE_OK &&
648 out_obj.type == ACPI_TYPE_INTEGER);
649 if (success && res)
650 *res = out_obj.integer.value;
651 break;
652 case 'v': /* void */
653 success = status == AE_OK;
654 break;
655 /* add more types as needed */
656 default:
657 pr_err("acpi_evalf() called with invalid format character '%c'\n",
658 res_type);
659 return 0;
660 }
661
662 if (!success && !quiet)
663 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
664 method, fmt0, acpi_format_exception(status));
665
666 return success;
667 }
668
acpi_ec_read(int i,u8 * p)669 static int acpi_ec_read(int i, u8 *p)
670 {
671 int v;
672
673 if (ecrd_handle) {
674 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
675 return 0;
676 *p = v;
677 } else {
678 if (ec_read(i, p) < 0)
679 return 0;
680 }
681
682 return 1;
683 }
684
acpi_ec_write(int i,u8 v)685 static int acpi_ec_write(int i, u8 v)
686 {
687 if (ecwr_handle) {
688 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
689 return 0;
690 } else {
691 if (ec_write(i, v) < 0)
692 return 0;
693 }
694
695 return 1;
696 }
697
issue_thinkpad_cmos_command(int cmos_cmd)698 static int issue_thinkpad_cmos_command(int cmos_cmd)
699 {
700 if (!cmos_handle)
701 return -ENXIO;
702
703 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
704 return -EIO;
705
706 return 0;
707 }
708
709 /*************************************************************************
710 * ACPI device model
711 */
712
713 #define TPACPI_ACPIHANDLE_INIT(object) \
714 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
715 object##_paths, ARRAY_SIZE(object##_paths))
716
drv_acpi_handle_init(const char * name,acpi_handle * handle,const acpi_handle parent,char ** paths,const int num_paths)717 static void __init drv_acpi_handle_init(const char *name,
718 acpi_handle *handle, const acpi_handle parent,
719 char **paths, const int num_paths)
720 {
721 int i;
722 acpi_status status;
723
724 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
725 name);
726
727 for (i = 0; i < num_paths; i++) {
728 status = acpi_get_handle(parent, paths[i], handle);
729 if (ACPI_SUCCESS(status)) {
730 dbg_printk(TPACPI_DBG_INIT,
731 "Found ACPI handle %s for %s\n",
732 paths[i], name);
733 return;
734 }
735 }
736
737 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
738 name);
739 *handle = NULL;
740 }
741
tpacpi_acpi_handle_locate_callback(acpi_handle handle,u32 level,void * context,void ** return_value)742 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
743 u32 level, void *context, void **return_value)
744 {
745 if (!strcmp(context, "video")) {
746 struct acpi_device *dev = acpi_fetch_acpi_dev(handle);
747
748 if (!dev || strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
749 return AE_OK;
750 }
751
752 *(acpi_handle *)return_value = handle;
753
754 return AE_CTRL_TERMINATE;
755 }
756
tpacpi_acpi_handle_locate(const char * name,const char * hid,acpi_handle * handle)757 static void __init tpacpi_acpi_handle_locate(const char *name,
758 const char *hid,
759 acpi_handle *handle)
760 {
761 acpi_status status;
762 acpi_handle device_found;
763
764 BUG_ON(!name || !handle);
765 vdbg_printk(TPACPI_DBG_INIT,
766 "trying to locate ACPI handle for %s, using HID %s\n",
767 name, hid ? hid : "NULL");
768
769 memset(&device_found, 0, sizeof(device_found));
770 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
771 (void *)name, &device_found);
772
773 *handle = NULL;
774
775 if (ACPI_SUCCESS(status)) {
776 *handle = device_found;
777 dbg_printk(TPACPI_DBG_INIT,
778 "Found ACPI handle for %s\n", name);
779 } else {
780 vdbg_printk(TPACPI_DBG_INIT,
781 "Could not locate an ACPI handle for %s: %s\n",
782 name, acpi_format_exception(status));
783 }
784 }
785
dispatch_acpi_notify(acpi_handle handle,u32 event,void * data)786 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
787 {
788 struct ibm_struct *ibm = data;
789
790 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
791 return;
792
793 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
794 return;
795
796 ibm->acpi->notify(ibm, event);
797 }
798
setup_acpi_notify(struct ibm_struct * ibm)799 static int __init setup_acpi_notify(struct ibm_struct *ibm)
800 {
801 acpi_status status;
802
803 BUG_ON(!ibm->acpi);
804
805 if (!*ibm->acpi->handle)
806 return 0;
807
808 vdbg_printk(TPACPI_DBG_INIT,
809 "setting up ACPI notify for %s\n", ibm->name);
810
811 ibm->acpi->device = acpi_fetch_acpi_dev(*ibm->acpi->handle);
812 if (!ibm->acpi->device) {
813 pr_err("acpi_fetch_acpi_dev(%s) failed\n", ibm->name);
814 return -ENODEV;
815 }
816
817 ibm->acpi->device->driver_data = ibm;
818 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
819 TPACPI_ACPI_EVENT_PREFIX,
820 ibm->name);
821
822 status = acpi_install_notify_handler(*ibm->acpi->handle,
823 ibm->acpi->type, dispatch_acpi_notify, ibm);
824 if (ACPI_FAILURE(status)) {
825 if (status == AE_ALREADY_EXISTS) {
826 pr_notice("another device driver is already handling %s events\n",
827 ibm->name);
828 } else {
829 pr_err("acpi_install_notify_handler(%s) failed: %s\n",
830 ibm->name, acpi_format_exception(status));
831 }
832 return -ENODEV;
833 }
834 ibm->flags.acpi_notify_installed = 1;
835 return 0;
836 }
837
tpacpi_device_add(struct acpi_device * device)838 static int __init tpacpi_device_add(struct acpi_device *device)
839 {
840 return 0;
841 }
842
register_tpacpi_subdriver(struct ibm_struct * ibm)843 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
844 {
845 int rc;
846
847 dbg_printk(TPACPI_DBG_INIT,
848 "registering %s as an ACPI driver\n", ibm->name);
849
850 BUG_ON(!ibm->acpi);
851
852 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
853 if (!ibm->acpi->driver) {
854 pr_err("failed to allocate memory for ibm->acpi->driver\n");
855 return -ENOMEM;
856 }
857
858 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
859 ibm->acpi->driver->ids = ibm->acpi->hid;
860
861 ibm->acpi->driver->ops.add = &tpacpi_device_add;
862
863 rc = acpi_bus_register_driver(ibm->acpi->driver);
864 if (rc < 0) {
865 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
866 ibm->name, rc);
867 kfree(ibm->acpi->driver);
868 ibm->acpi->driver = NULL;
869 } else if (!rc)
870 ibm->flags.acpi_driver_registered = 1;
871
872 return rc;
873 }
874
875
876 /****************************************************************************
877 ****************************************************************************
878 *
879 * Procfs Helpers
880 *
881 ****************************************************************************
882 ****************************************************************************/
883
dispatch_proc_show(struct seq_file * m,void * v)884 static int dispatch_proc_show(struct seq_file *m, void *v)
885 {
886 struct ibm_struct *ibm = m->private;
887
888 if (!ibm || !ibm->read)
889 return -EINVAL;
890 return ibm->read(m);
891 }
892
dispatch_proc_open(struct inode * inode,struct file * file)893 static int dispatch_proc_open(struct inode *inode, struct file *file)
894 {
895 return single_open(file, dispatch_proc_show, pde_data(inode));
896 }
897
dispatch_proc_write(struct file * file,const char __user * userbuf,size_t count,loff_t * pos)898 static ssize_t dispatch_proc_write(struct file *file,
899 const char __user *userbuf,
900 size_t count, loff_t *pos)
901 {
902 struct ibm_struct *ibm = pde_data(file_inode(file));
903 char *kernbuf;
904 int ret;
905
906 if (!ibm || !ibm->write)
907 return -EINVAL;
908 if (count > PAGE_SIZE - 1)
909 return -EINVAL;
910
911 kernbuf = memdup_user_nul(userbuf, count);
912 if (IS_ERR(kernbuf))
913 return PTR_ERR(kernbuf);
914 ret = ibm->write(kernbuf);
915 if (ret == 0)
916 ret = count;
917
918 kfree(kernbuf);
919
920 return ret;
921 }
922
923 static const struct proc_ops dispatch_proc_ops = {
924 .proc_open = dispatch_proc_open,
925 .proc_read = seq_read,
926 .proc_lseek = seq_lseek,
927 .proc_release = single_release,
928 .proc_write = dispatch_proc_write,
929 };
930
931 /****************************************************************************
932 ****************************************************************************
933 *
934 * Device model: input, hwmon and platform
935 *
936 ****************************************************************************
937 ****************************************************************************/
938
939 static struct platform_device *tpacpi_pdev;
940 static struct platform_device *tpacpi_sensors_pdev;
941 static struct device *tpacpi_hwmon;
942 static struct input_dev *tpacpi_inputdev;
943 static struct mutex tpacpi_inputdev_send_mutex;
944 static LIST_HEAD(tpacpi_all_drivers);
945
946 #ifdef CONFIG_PM_SLEEP
tpacpi_suspend_handler(struct device * dev)947 static int tpacpi_suspend_handler(struct device *dev)
948 {
949 struct ibm_struct *ibm, *itmp;
950
951 list_for_each_entry_safe(ibm, itmp,
952 &tpacpi_all_drivers,
953 all_drivers) {
954 if (ibm->suspend)
955 (ibm->suspend)();
956 }
957
958 return 0;
959 }
960
tpacpi_resume_handler(struct device * dev)961 static int tpacpi_resume_handler(struct device *dev)
962 {
963 struct ibm_struct *ibm, *itmp;
964
965 list_for_each_entry_safe(ibm, itmp,
966 &tpacpi_all_drivers,
967 all_drivers) {
968 if (ibm->resume)
969 (ibm->resume)();
970 }
971
972 return 0;
973 }
974 #endif
975
976 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
977 tpacpi_suspend_handler, tpacpi_resume_handler);
978
tpacpi_shutdown_handler(struct platform_device * pdev)979 static void tpacpi_shutdown_handler(struct platform_device *pdev)
980 {
981 struct ibm_struct *ibm, *itmp;
982
983 list_for_each_entry_safe(ibm, itmp,
984 &tpacpi_all_drivers,
985 all_drivers) {
986 if (ibm->shutdown)
987 (ibm->shutdown)();
988 }
989 }
990
991 /*************************************************************************
992 * sysfs support helpers
993 */
994
parse_strtoul(const char * buf,unsigned long max,unsigned long * value)995 static int parse_strtoul(const char *buf,
996 unsigned long max, unsigned long *value)
997 {
998 char *endp;
999
1000 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1001 endp = skip_spaces(endp);
1002 if (*endp || *value > max)
1003 return -EINVAL;
1004
1005 return 0;
1006 }
1007
tpacpi_disable_brightness_delay(void)1008 static void tpacpi_disable_brightness_delay(void)
1009 {
1010 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1011 pr_notice("ACPI backlight control delay disabled\n");
1012 }
1013
printk_deprecated_attribute(const char * const what,const char * const details)1014 static void printk_deprecated_attribute(const char * const what,
1015 const char * const details)
1016 {
1017 tpacpi_log_usertask("deprecated sysfs attribute");
1018 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n",
1019 what, details);
1020 }
1021
1022 /*************************************************************************
1023 * rfkill and radio control support helpers
1024 */
1025
1026 /*
1027 * ThinkPad-ACPI firmware handling model:
1028 *
1029 * WLSW (master wireless switch) is event-driven, and is common to all
1030 * firmware-controlled radios. It cannot be controlled, just monitored,
1031 * as expected. It overrides all radio state in firmware
1032 *
1033 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1034 * (TODO: verify how WLSW interacts with the returned radio state).
1035 *
1036 * The only time there are shadow radio state changes, is when
1037 * masked-off hotkeys are used.
1038 */
1039
1040 /*
1041 * Internal driver API for radio state:
1042 *
1043 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1044 * bool: true means radio blocked (off)
1045 */
1046 enum tpacpi_rfkill_state {
1047 TPACPI_RFK_RADIO_OFF = 0,
1048 TPACPI_RFK_RADIO_ON
1049 };
1050
1051 /* rfkill switches */
1052 enum tpacpi_rfk_id {
1053 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1054 TPACPI_RFK_WWAN_SW_ID,
1055 TPACPI_RFK_UWB_SW_ID,
1056 TPACPI_RFK_SW_MAX
1057 };
1058
1059 static const char *tpacpi_rfkill_names[] = {
1060 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1061 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1062 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1063 [TPACPI_RFK_SW_MAX] = NULL
1064 };
1065
1066 /* ThinkPad-ACPI rfkill subdriver */
1067 struct tpacpi_rfk {
1068 struct rfkill *rfkill;
1069 enum tpacpi_rfk_id id;
1070 const struct tpacpi_rfk_ops *ops;
1071 };
1072
1073 struct tpacpi_rfk_ops {
1074 /* firmware interface */
1075 int (*get_status)(void);
1076 int (*set_status)(const enum tpacpi_rfkill_state);
1077 };
1078
1079 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1080
1081 /* Query FW and update rfkill sw state for a given rfkill switch */
tpacpi_rfk_update_swstate(const struct tpacpi_rfk * tp_rfk)1082 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1083 {
1084 int status;
1085
1086 if (!tp_rfk)
1087 return -ENODEV;
1088
1089 status = (tp_rfk->ops->get_status)();
1090 if (status < 0)
1091 return status;
1092
1093 rfkill_set_sw_state(tp_rfk->rfkill,
1094 (status == TPACPI_RFK_RADIO_OFF));
1095
1096 return status;
1097 }
1098
1099 /*
1100 * Sync the HW-blocking state of all rfkill switches,
1101 * do notice it causes the rfkill core to schedule uevents
1102 */
tpacpi_rfk_update_hwblock_state(bool blocked)1103 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1104 {
1105 unsigned int i;
1106 struct tpacpi_rfk *tp_rfk;
1107
1108 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1109 tp_rfk = tpacpi_rfkill_switches[i];
1110 if (tp_rfk) {
1111 if (rfkill_set_hw_state(tp_rfk->rfkill,
1112 blocked)) {
1113 /* ignore -- we track sw block */
1114 }
1115 }
1116 }
1117 }
1118
1119 /* Call to get the WLSW state from the firmware */
1120 static int hotkey_get_wlsw(void);
1121
1122 /* Call to query WLSW state and update all rfkill switches */
tpacpi_rfk_check_hwblock_state(void)1123 static bool tpacpi_rfk_check_hwblock_state(void)
1124 {
1125 int res = hotkey_get_wlsw();
1126 int hw_blocked;
1127
1128 /* When unknown or unsupported, we have to assume it is unblocked */
1129 if (res < 0)
1130 return false;
1131
1132 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1133 tpacpi_rfk_update_hwblock_state(hw_blocked);
1134
1135 return hw_blocked;
1136 }
1137
tpacpi_rfk_hook_set_block(void * data,bool blocked)1138 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1139 {
1140 struct tpacpi_rfk *tp_rfk = data;
1141 int res;
1142
1143 dbg_printk(TPACPI_DBG_RFKILL,
1144 "request to change radio state to %s\n",
1145 blocked ? "blocked" : "unblocked");
1146
1147 /* try to set radio state */
1148 res = (tp_rfk->ops->set_status)(blocked ?
1149 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1150
1151 /* and update the rfkill core with whatever the FW really did */
1152 tpacpi_rfk_update_swstate(tp_rfk);
1153
1154 return (res < 0) ? res : 0;
1155 }
1156
1157 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1158 .set_block = tpacpi_rfk_hook_set_block,
1159 };
1160
tpacpi_new_rfkill(const enum tpacpi_rfk_id id,const struct tpacpi_rfk_ops * tp_rfkops,const enum rfkill_type rfktype,const char * name,const bool set_default)1161 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1162 const struct tpacpi_rfk_ops *tp_rfkops,
1163 const enum rfkill_type rfktype,
1164 const char *name,
1165 const bool set_default)
1166 {
1167 struct tpacpi_rfk *atp_rfk;
1168 int res;
1169 bool sw_state = false;
1170 bool hw_state;
1171 int sw_status;
1172
1173 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1174
1175 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1176 if (atp_rfk)
1177 atp_rfk->rfkill = rfkill_alloc(name,
1178 &tpacpi_pdev->dev,
1179 rfktype,
1180 &tpacpi_rfk_rfkill_ops,
1181 atp_rfk);
1182 if (!atp_rfk || !atp_rfk->rfkill) {
1183 pr_err("failed to allocate memory for rfkill class\n");
1184 kfree(atp_rfk);
1185 return -ENOMEM;
1186 }
1187
1188 atp_rfk->id = id;
1189 atp_rfk->ops = tp_rfkops;
1190
1191 sw_status = (tp_rfkops->get_status)();
1192 if (sw_status < 0) {
1193 pr_err("failed to read initial state for %s, error %d\n",
1194 name, sw_status);
1195 } else {
1196 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1197 if (set_default) {
1198 /* try to keep the initial state, since we ask the
1199 * firmware to preserve it across S5 in NVRAM */
1200 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1201 }
1202 }
1203 hw_state = tpacpi_rfk_check_hwblock_state();
1204 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1205
1206 res = rfkill_register(atp_rfk->rfkill);
1207 if (res < 0) {
1208 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1209 rfkill_destroy(atp_rfk->rfkill);
1210 kfree(atp_rfk);
1211 return res;
1212 }
1213
1214 tpacpi_rfkill_switches[id] = atp_rfk;
1215
1216 pr_info("rfkill switch %s: radio is %sblocked\n",
1217 name, (sw_state || hw_state) ? "" : "un");
1218 return 0;
1219 }
1220
tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)1221 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1222 {
1223 struct tpacpi_rfk *tp_rfk;
1224
1225 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1226
1227 tp_rfk = tpacpi_rfkill_switches[id];
1228 if (tp_rfk) {
1229 rfkill_unregister(tp_rfk->rfkill);
1230 rfkill_destroy(tp_rfk->rfkill);
1231 tpacpi_rfkill_switches[id] = NULL;
1232 kfree(tp_rfk);
1233 }
1234 }
1235
printk_deprecated_rfkill_attribute(const char * const what)1236 static void printk_deprecated_rfkill_attribute(const char * const what)
1237 {
1238 printk_deprecated_attribute(what,
1239 "Please switch to generic rfkill before year 2010");
1240 }
1241
1242 /* sysfs <radio> enable ------------------------------------------------ */
tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,struct device_attribute * attr,char * buf)1243 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1244 struct device_attribute *attr,
1245 char *buf)
1246 {
1247 int status;
1248
1249 printk_deprecated_rfkill_attribute(attr->attr.name);
1250
1251 /* This is in the ABI... */
1252 if (tpacpi_rfk_check_hwblock_state()) {
1253 status = TPACPI_RFK_RADIO_OFF;
1254 } else {
1255 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1256 if (status < 0)
1257 return status;
1258 }
1259
1260 return sysfs_emit(buf, "%d\n",
1261 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1262 }
1263
tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,struct device_attribute * attr,const char * buf,size_t count)1264 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1265 struct device_attribute *attr,
1266 const char *buf, size_t count)
1267 {
1268 unsigned long t;
1269 int res;
1270
1271 printk_deprecated_rfkill_attribute(attr->attr.name);
1272
1273 if (parse_strtoul(buf, 1, &t))
1274 return -EINVAL;
1275
1276 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1277
1278 /* This is in the ABI... */
1279 if (tpacpi_rfk_check_hwblock_state() && !!t)
1280 return -EPERM;
1281
1282 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1283 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1284 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1285
1286 return (res < 0) ? res : count;
1287 }
1288
1289 /* procfs -------------------------------------------------------------- */
tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id,struct seq_file * m)1290 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1291 {
1292 if (id >= TPACPI_RFK_SW_MAX)
1293 seq_printf(m, "status:\t\tnot supported\n");
1294 else {
1295 int status;
1296
1297 /* This is in the ABI... */
1298 if (tpacpi_rfk_check_hwblock_state()) {
1299 status = TPACPI_RFK_RADIO_OFF;
1300 } else {
1301 status = tpacpi_rfk_update_swstate(
1302 tpacpi_rfkill_switches[id]);
1303 if (status < 0)
1304 return status;
1305 }
1306
1307 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status == TPACPI_RFK_RADIO_ON));
1308 seq_printf(m, "commands:\tenable, disable\n");
1309 }
1310
1311 return 0;
1312 }
1313
tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id,char * buf)1314 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1315 {
1316 char *cmd;
1317 int status = -1;
1318 int res = 0;
1319
1320 if (id >= TPACPI_RFK_SW_MAX)
1321 return -ENODEV;
1322
1323 while ((cmd = strsep(&buf, ","))) {
1324 if (strstarts(cmd, "enable"))
1325 status = TPACPI_RFK_RADIO_ON;
1326 else if (strstarts(cmd, "disable"))
1327 status = TPACPI_RFK_RADIO_OFF;
1328 else
1329 return -EINVAL;
1330 }
1331
1332 if (status != -1) {
1333 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1334 str_enable_disable(status == TPACPI_RFK_RADIO_ON),
1335 tpacpi_rfkill_names[id]);
1336 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1337 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1338 }
1339
1340 return res;
1341 }
1342
1343 /*************************************************************************
1344 * thinkpad-acpi driver attributes
1345 */
1346
1347 /* interface_version --------------------------------------------------- */
interface_version_show(struct device_driver * drv,char * buf)1348 static ssize_t interface_version_show(struct device_driver *drv, char *buf)
1349 {
1350 return sysfs_emit(buf, "0x%08x\n", TPACPI_SYSFS_VERSION);
1351 }
1352 static DRIVER_ATTR_RO(interface_version);
1353
1354 /* debug_level --------------------------------------------------------- */
debug_level_show(struct device_driver * drv,char * buf)1355 static ssize_t debug_level_show(struct device_driver *drv, char *buf)
1356 {
1357 return sysfs_emit(buf, "0x%04x\n", dbg_level);
1358 }
1359
debug_level_store(struct device_driver * drv,const char * buf,size_t count)1360 static ssize_t debug_level_store(struct device_driver *drv, const char *buf,
1361 size_t count)
1362 {
1363 unsigned long t;
1364
1365 if (parse_strtoul(buf, 0xffff, &t))
1366 return -EINVAL;
1367
1368 dbg_level = t;
1369
1370 return count;
1371 }
1372 static DRIVER_ATTR_RW(debug_level);
1373
1374 /* version ------------------------------------------------------------- */
version_show(struct device_driver * drv,char * buf)1375 static ssize_t version_show(struct device_driver *drv, char *buf)
1376 {
1377 return sysfs_emit(buf, "%s v%s\n",
1378 TPACPI_DESC, TPACPI_VERSION);
1379 }
1380 static DRIVER_ATTR_RO(version);
1381
1382 /* --------------------------------------------------------------------- */
1383
1384 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1385
1386 /* wlsw_emulstate ------------------------------------------------------ */
wlsw_emulstate_show(struct device_driver * drv,char * buf)1387 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf)
1388 {
1389 return sysfs_emit(buf, "%d\n", !!tpacpi_wlsw_emulstate);
1390 }
1391
wlsw_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1392 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf,
1393 size_t count)
1394 {
1395 unsigned long t;
1396
1397 if (parse_strtoul(buf, 1, &t))
1398 return -EINVAL;
1399
1400 if (tpacpi_wlsw_emulstate != !!t) {
1401 tpacpi_wlsw_emulstate = !!t;
1402 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1403 }
1404
1405 return count;
1406 }
1407 static DRIVER_ATTR_RW(wlsw_emulstate);
1408
1409 /* bluetooth_emulstate ------------------------------------------------- */
bluetooth_emulstate_show(struct device_driver * drv,char * buf)1410 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf)
1411 {
1412 return sysfs_emit(buf, "%d\n", !!tpacpi_bluetooth_emulstate);
1413 }
1414
bluetooth_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1415 static ssize_t bluetooth_emulstate_store(struct device_driver *drv,
1416 const char *buf, size_t count)
1417 {
1418 unsigned long t;
1419
1420 if (parse_strtoul(buf, 1, &t))
1421 return -EINVAL;
1422
1423 tpacpi_bluetooth_emulstate = !!t;
1424
1425 return count;
1426 }
1427 static DRIVER_ATTR_RW(bluetooth_emulstate);
1428
1429 /* wwan_emulstate ------------------------------------------------- */
wwan_emulstate_show(struct device_driver * drv,char * buf)1430 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf)
1431 {
1432 return sysfs_emit(buf, "%d\n", !!tpacpi_wwan_emulstate);
1433 }
1434
wwan_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1435 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf,
1436 size_t count)
1437 {
1438 unsigned long t;
1439
1440 if (parse_strtoul(buf, 1, &t))
1441 return -EINVAL;
1442
1443 tpacpi_wwan_emulstate = !!t;
1444
1445 return count;
1446 }
1447 static DRIVER_ATTR_RW(wwan_emulstate);
1448
1449 /* uwb_emulstate ------------------------------------------------- */
uwb_emulstate_show(struct device_driver * drv,char * buf)1450 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf)
1451 {
1452 return sysfs_emit(buf, "%d\n", !!tpacpi_uwb_emulstate);
1453 }
1454
uwb_emulstate_store(struct device_driver * drv,const char * buf,size_t count)1455 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf,
1456 size_t count)
1457 {
1458 unsigned long t;
1459
1460 if (parse_strtoul(buf, 1, &t))
1461 return -EINVAL;
1462
1463 tpacpi_uwb_emulstate = !!t;
1464
1465 return count;
1466 }
1467 static DRIVER_ATTR_RW(uwb_emulstate);
1468 #endif
1469
1470 /*************************************************************************
1471 * Firmware Data
1472 */
1473
1474 /*
1475 * Table of recommended minimum BIOS versions
1476 *
1477 * Reasons for listing:
1478 * 1. Stable BIOS, listed because the unknown amount of
1479 * bugs and bad ACPI behaviour on older versions
1480 *
1481 * 2. BIOS or EC fw with known bugs that trigger on Linux
1482 *
1483 * 3. BIOS with known reduced functionality in older versions
1484 *
1485 * We recommend the latest BIOS and EC version.
1486 * We only support the latest BIOS and EC fw version as a rule.
1487 *
1488 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1489 * Information from users in ThinkWiki
1490 *
1491 * WARNING: we use this table also to detect that the machine is
1492 * a ThinkPad in some cases, so don't remove entries lightly.
1493 */
1494
1495 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1496 { .vendor = (__v), \
1497 .bios = TPID(__id1, __id2), \
1498 .ec = TPACPI_MATCH_ANY, \
1499 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \
1500 | TPVER(__bv1, __bv2) }
1501
1502 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1503 __eid, __ev1, __ev2) \
1504 { .vendor = (__v), \
1505 .bios = TPID(__bid1, __bid2), \
1506 .ec = __eid, \
1507 .quirks = TPVER(__ev1, __ev2) << 16 \
1508 | TPVER(__bv1, __bv2) }
1509
1510 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1511 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1512
1513 /* Outdated IBM BIOSes often lack the EC id string */
1514 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1515 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1516 __bv1, __bv2, TPID(__id1, __id2), \
1517 __ev1, __ev2), \
1518 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1519 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1520 __ev1, __ev2)
1521
1522 /* Outdated IBM BIOSes often lack the EC id string */
1523 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1524 __eid1, __eid2, __ev1, __ev2) \
1525 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1526 __bv1, __bv2, TPID(__eid1, __eid2), \
1527 __ev1, __ev2), \
1528 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1529 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1530 __ev1, __ev2)
1531
1532 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1533 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1534
1535 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1536 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1537 __bv1, __bv2, TPID(__id1, __id2), \
1538 __ev1, __ev2)
1539
1540 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1541 __eid1, __eid2, __ev1, __ev2) \
1542 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1543 __bv1, __bv2, TPID(__eid1, __eid2), \
1544 __ev1, __ev2)
1545
1546 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1547 /* Numeric models ------------------ */
1548 /* FW MODEL BIOS VERS */
1549 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1550 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1551 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1552 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1553 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1554 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1555 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1556 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1557 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1558
1559 /* A-series ------------------------- */
1560 /* FW MODEL BIOS VERS EC VERS */
1561 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1562 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1563 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1564 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1565 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1566 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1567 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1568 TPV_QI0('1', '3', '2', '0'), /* A22m */
1569 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1570 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1571 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1572
1573 /* G-series ------------------------- */
1574 /* FW MODEL BIOS VERS */
1575 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1576 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1577
1578 /* R-series, T-series --------------- */
1579 /* FW MODEL BIOS VERS EC VERS */
1580 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1581 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1582 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1583 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1584 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1585 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1586 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1587 T40/p, T41/p, T42/p (1) */
1588 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1589 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1590 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1591 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1592
1593 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1594 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1595 TPV_QI0('1', '6', '3', '2'), /* T22 */
1596 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1597 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1598 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1599
1600 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1601 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1602 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1603
1604 /* BIOS FW BIOS VERS EC FW EC VERS */
1605 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1606 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1607
1608 /* X-series ------------------------- */
1609 /* FW MODEL BIOS VERS EC VERS */
1610 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1611 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1612 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1613 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1614 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1615 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1616 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1617
1618 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1619 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1620
1621 /* (0) - older versions lack DMI EC fw string and functionality */
1622 /* (1) - older versions known to lack functionality */
1623 };
1624
1625 #undef TPV_QL1
1626 #undef TPV_QL0
1627 #undef TPV_QI2
1628 #undef TPV_QI1
1629 #undef TPV_QI0
1630 #undef TPV_Q_X
1631 #undef TPV_Q
1632
tpacpi_check_outdated_fw(void)1633 static void __init tpacpi_check_outdated_fw(void)
1634 {
1635 unsigned long fwvers;
1636 u16 ec_version, bios_version;
1637
1638 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1639 ARRAY_SIZE(tpacpi_bios_version_qtable));
1640
1641 if (!fwvers)
1642 return;
1643
1644 bios_version = fwvers & 0xffffU;
1645 ec_version = (fwvers >> 16) & 0xffffU;
1646
1647 /* note that unknown versions are set to 0x0000 and we use that */
1648 if ((bios_version > thinkpad_id.bios_release) ||
1649 (ec_version > thinkpad_id.ec_release &&
1650 ec_version != TPACPI_MATCH_ANY_VERSION)) {
1651 /*
1652 * The changelogs would let us track down the exact
1653 * reason, but it is just too much of a pain to track
1654 * it. We only list BIOSes that are either really
1655 * broken, or really stable to begin with, so it is
1656 * best if the user upgrades the firmware anyway.
1657 */
1658 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1659 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n");
1660 }
1661 }
1662
tpacpi_is_fw_known(void)1663 static bool __init tpacpi_is_fw_known(void)
1664 {
1665 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1666 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1667 }
1668
1669 /****************************************************************************
1670 ****************************************************************************
1671 *
1672 * Subdrivers
1673 *
1674 ****************************************************************************
1675 ****************************************************************************/
1676
1677 /*************************************************************************
1678 * thinkpad-acpi metadata subdriver
1679 */
1680
thinkpad_acpi_driver_read(struct seq_file * m)1681 static int thinkpad_acpi_driver_read(struct seq_file *m)
1682 {
1683 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1684 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1685 return 0;
1686 }
1687
1688 static struct ibm_struct thinkpad_acpi_driver_data = {
1689 .name = "driver",
1690 .read = thinkpad_acpi_driver_read,
1691 };
1692
1693 /*************************************************************************
1694 * Hotkey subdriver
1695 */
1696
1697 /*
1698 * ThinkPad firmware event model
1699 *
1700 * The ThinkPad firmware has two main event interfaces: normal ACPI
1701 * notifications (which follow the ACPI standard), and a private event
1702 * interface.
1703 *
1704 * The private event interface also issues events for the hotkeys. As
1705 * the driver gained features, the event handling code ended up being
1706 * built around the hotkey subdriver. This will need to be refactored
1707 * to a more formal event API eventually.
1708 *
1709 * Some "hotkeys" are actually supposed to be used as event reports,
1710 * such as "brightness has changed", "volume has changed", depending on
1711 * the ThinkPad model and how the firmware is operating.
1712 *
1713 * Unlike other classes, hotkey-class events have mask/unmask control on
1714 * non-ancient firmware. However, how it behaves changes a lot with the
1715 * firmware model and version.
1716 */
1717
1718 enum { /* hot key scan codes (derived from ACPI DSDT) */
1719 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1720 TP_ACPI_HOTKEYSCAN_FNF2,
1721 TP_ACPI_HOTKEYSCAN_FNF3,
1722 TP_ACPI_HOTKEYSCAN_FNF4,
1723 TP_ACPI_HOTKEYSCAN_FNF5,
1724 TP_ACPI_HOTKEYSCAN_FNF6,
1725 TP_ACPI_HOTKEYSCAN_FNF7,
1726 TP_ACPI_HOTKEYSCAN_FNF8,
1727 TP_ACPI_HOTKEYSCAN_FNF9,
1728 TP_ACPI_HOTKEYSCAN_FNF10,
1729 TP_ACPI_HOTKEYSCAN_FNF11,
1730 TP_ACPI_HOTKEYSCAN_FNF12,
1731 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1732 TP_ACPI_HOTKEYSCAN_FNINSERT,
1733 TP_ACPI_HOTKEYSCAN_FNDELETE,
1734 TP_ACPI_HOTKEYSCAN_FNHOME,
1735 TP_ACPI_HOTKEYSCAN_FNEND,
1736 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1737 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1738 TP_ACPI_HOTKEYSCAN_FNSPACE,
1739 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1740 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1741 TP_ACPI_HOTKEYSCAN_MUTE,
1742 TP_ACPI_HOTKEYSCAN_THINKPAD,
1743 TP_ACPI_HOTKEYSCAN_UNK1,
1744 TP_ACPI_HOTKEYSCAN_UNK2,
1745 TP_ACPI_HOTKEYSCAN_UNK3,
1746 TP_ACPI_HOTKEYSCAN_UNK4,
1747 TP_ACPI_HOTKEYSCAN_UNK5,
1748 TP_ACPI_HOTKEYSCAN_UNK6,
1749 TP_ACPI_HOTKEYSCAN_UNK7,
1750 TP_ACPI_HOTKEYSCAN_UNK8,
1751
1752 /* Adaptive keyboard keycodes */
1753 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1754 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1755 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
1756 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
1757 TP_ACPI_HOTKEYSCAN_CLOUD,
1758 TP_ACPI_HOTKEYSCAN_UNK9,
1759 TP_ACPI_HOTKEYSCAN_VOICE,
1760 TP_ACPI_HOTKEYSCAN_UNK10,
1761 TP_ACPI_HOTKEYSCAN_GESTURES,
1762 TP_ACPI_HOTKEYSCAN_UNK11,
1763 TP_ACPI_HOTKEYSCAN_UNK12,
1764 TP_ACPI_HOTKEYSCAN_UNK13,
1765 TP_ACPI_HOTKEYSCAN_CONFIG,
1766 TP_ACPI_HOTKEYSCAN_NEW_TAB,
1767 TP_ACPI_HOTKEYSCAN_RELOAD,
1768 TP_ACPI_HOTKEYSCAN_BACK,
1769 TP_ACPI_HOTKEYSCAN_MIC_DOWN,
1770 TP_ACPI_HOTKEYSCAN_MIC_UP,
1771 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
1772 TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
1773 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
1774
1775 /* Lenovo extended keymap, starting at 0x1300 */
1776 TP_ACPI_HOTKEYSCAN_EXTENDED_START,
1777 /* first new observed key (star, favorites) is 0x1311 */
1778 TP_ACPI_HOTKEYSCAN_STAR = 69,
1779 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2,
1780 TP_ACPI_HOTKEYSCAN_CALCULATOR,
1781 TP_ACPI_HOTKEYSCAN_BLUETOOTH,
1782 TP_ACPI_HOTKEYSCAN_KEYBOARD,
1783 TP_ACPI_HOTKEYSCAN_FN_RIGHT_SHIFT, /* Used by "Lenovo Quick Clean" */
1784 TP_ACPI_HOTKEYSCAN_NOTIFICATION_CENTER,
1785 TP_ACPI_HOTKEYSCAN_PICKUP_PHONE,
1786 TP_ACPI_HOTKEYSCAN_HANGUP_PHONE,
1787
1788 /* Hotkey keymap size */
1789 TPACPI_HOTKEY_MAP_LEN
1790 };
1791
1792 enum { /* Keys/events available through NVRAM polling */
1793 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1794 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1795 };
1796
1797 enum { /* Positions of some of the keys in hotkey masks */
1798 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1799 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1800 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1801 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1802 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1803 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1804 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1805 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1806 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1807 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1808 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1809 };
1810
1811 enum { /* NVRAM to ACPI HKEY group map */
1812 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1813 TP_ACPI_HKEY_ZOOM_MASK |
1814 TP_ACPI_HKEY_DISPSWTCH_MASK |
1815 TP_ACPI_HKEY_HIBERNATE_MASK,
1816 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1817 TP_ACPI_HKEY_BRGHTDWN_MASK,
1818 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1819 TP_ACPI_HKEY_VOLDWN_MASK |
1820 TP_ACPI_HKEY_MUTE_MASK,
1821 };
1822
1823 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1824 struct tp_nvram_state {
1825 u16 thinkpad_toggle:1;
1826 u16 zoom_toggle:1;
1827 u16 display_toggle:1;
1828 u16 thinklight_toggle:1;
1829 u16 hibernate_toggle:1;
1830 u16 displayexp_toggle:1;
1831 u16 display_state:1;
1832 u16 brightness_toggle:1;
1833 u16 volume_toggle:1;
1834 u16 mute:1;
1835
1836 u8 brightness_level;
1837 u8 volume_level;
1838 };
1839
1840 /* kthread for the hotkey poller */
1841 static struct task_struct *tpacpi_hotkey_task;
1842
1843 /*
1844 * Acquire mutex to write poller control variables as an
1845 * atomic block.
1846 *
1847 * Increment hotkey_config_change when changing them if you
1848 * want the kthread to forget old state.
1849 *
1850 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1851 */
1852 static struct mutex hotkey_thread_data_mutex;
1853 static unsigned int hotkey_config_change;
1854
1855 /*
1856 * hotkey poller control variables
1857 *
1858 * Must be atomic or readers will also need to acquire mutex
1859 *
1860 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1861 * should be used only when the changes need to be taken as
1862 * a block, OR when one needs to force the kthread to forget
1863 * old state.
1864 */
1865 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1866 static unsigned int hotkey_poll_freq = 10; /* Hz */
1867
1868 #define HOTKEY_CONFIG_CRITICAL_START \
1869 do { \
1870 mutex_lock(&hotkey_thread_data_mutex); \
1871 hotkey_config_change++; \
1872 } while (0);
1873 #define HOTKEY_CONFIG_CRITICAL_END \
1874 mutex_unlock(&hotkey_thread_data_mutex);
1875
1876 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1877
1878 #define hotkey_source_mask 0U
1879 #define HOTKEY_CONFIG_CRITICAL_START
1880 #define HOTKEY_CONFIG_CRITICAL_END
1881
1882 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1883
1884 static struct mutex hotkey_mutex;
1885
1886 static enum { /* Reasons for waking up */
1887 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1888 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1889 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1890 } hotkey_wakeup_reason;
1891
1892 static int hotkey_autosleep_ack;
1893
1894 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
1895 static u32 hotkey_all_mask; /* all events supported in fw */
1896 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */
1897 static u32 hotkey_reserved_mask; /* events better left disabled */
1898 static u32 hotkey_driver_mask; /* events needed by the driver */
1899 static u32 hotkey_user_mask; /* events visible to userspace */
1900 static u32 hotkey_acpi_mask; /* events enabled in firmware */
1901
1902 static u16 *hotkey_keycode_map;
1903
1904 static void tpacpi_driver_event(const unsigned int hkey_event);
1905 static void hotkey_driver_event(const unsigned int scancode);
1906 static void hotkey_poll_setup(const bool may_warn);
1907
1908 /* HKEY.MHKG() return bits */
1909 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1910 enum {
1911 TP_ACPI_MULTI_MODE_INVALID = 0,
1912 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0,
1913 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1,
1914 TP_ACPI_MULTI_MODE_TABLET = 1 << 2,
1915 TP_ACPI_MULTI_MODE_FLAT = 1 << 3,
1916 TP_ACPI_MULTI_MODE_STAND = 1 << 4,
1917 TP_ACPI_MULTI_MODE_TENT = 1 << 5,
1918 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6,
1919 };
1920
1921 enum {
1922 /* The following modes are considered tablet mode for the purpose of
1923 * reporting the status to userspace. i.e. in all these modes it makes
1924 * sense to disable the laptop input devices such as touchpad and
1925 * keyboard.
1926 */
1927 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET |
1928 TP_ACPI_MULTI_MODE_STAND |
1929 TP_ACPI_MULTI_MODE_TENT |
1930 TP_ACPI_MULTI_MODE_STAND_TENT,
1931 };
1932
hotkey_get_wlsw(void)1933 static int hotkey_get_wlsw(void)
1934 {
1935 int status;
1936
1937 if (!tp_features.hotkey_wlsw)
1938 return -ENODEV;
1939
1940 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1941 if (dbg_wlswemul)
1942 return (tpacpi_wlsw_emulstate) ?
1943 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1944 #endif
1945
1946 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
1947 return -EIO;
1948
1949 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1950 }
1951
hotkey_gmms_get_tablet_mode(int s,int * has_tablet_mode)1952 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode)
1953 {
1954 int type = (s >> 16) & 0xffff;
1955 int value = s & 0xffff;
1956 int mode = TP_ACPI_MULTI_MODE_INVALID;
1957 int valid_modes = 0;
1958
1959 if (has_tablet_mode)
1960 *has_tablet_mode = 0;
1961
1962 switch (type) {
1963 case 1:
1964 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1965 TP_ACPI_MULTI_MODE_TABLET |
1966 TP_ACPI_MULTI_MODE_STAND_TENT;
1967 break;
1968 case 2:
1969 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1970 TP_ACPI_MULTI_MODE_FLAT |
1971 TP_ACPI_MULTI_MODE_TABLET |
1972 TP_ACPI_MULTI_MODE_STAND |
1973 TP_ACPI_MULTI_MODE_TENT;
1974 break;
1975 case 3:
1976 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1977 TP_ACPI_MULTI_MODE_FLAT;
1978 break;
1979 case 4:
1980 case 5:
1981 /* In mode 4, FLAT is not specified as a valid mode. However,
1982 * it can be seen at least on the X1 Yoga 2nd Generation.
1983 */
1984 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1985 TP_ACPI_MULTI_MODE_FLAT |
1986 TP_ACPI_MULTI_MODE_TABLET |
1987 TP_ACPI_MULTI_MODE_STAND |
1988 TP_ACPI_MULTI_MODE_TENT;
1989 break;
1990 default:
1991 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n",
1992 type, value, TPACPI_MAIL);
1993 return 0;
1994 }
1995
1996 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE))
1997 *has_tablet_mode = 1;
1998
1999 switch (value) {
2000 case 1:
2001 mode = TP_ACPI_MULTI_MODE_LAPTOP;
2002 break;
2003 case 2:
2004 mode = TP_ACPI_MULTI_MODE_FLAT;
2005 break;
2006 case 3:
2007 mode = TP_ACPI_MULTI_MODE_TABLET;
2008 break;
2009 case 4:
2010 if (type == 1)
2011 mode = TP_ACPI_MULTI_MODE_STAND_TENT;
2012 else
2013 mode = TP_ACPI_MULTI_MODE_STAND;
2014 break;
2015 case 5:
2016 mode = TP_ACPI_MULTI_MODE_TENT;
2017 break;
2018 default:
2019 if (type == 5 && value == 0xffff) {
2020 pr_warn("Multi mode status is undetected, assuming laptop\n");
2021 return 0;
2022 }
2023 }
2024
2025 if (!(mode & valid_modes)) {
2026 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n",
2027 value, type, TPACPI_MAIL);
2028 return 0;
2029 }
2030
2031 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE);
2032 }
2033
hotkey_get_tablet_mode(int * status)2034 static int hotkey_get_tablet_mode(int *status)
2035 {
2036 int s;
2037
2038 switch (tp_features.hotkey_tablet) {
2039 case TP_HOTKEY_TABLET_USES_MHKG:
2040 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2041 return -EIO;
2042
2043 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2044 break;
2045 case TP_HOTKEY_TABLET_USES_GMMS:
2046 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0))
2047 return -EIO;
2048
2049 *status = hotkey_gmms_get_tablet_mode(s, NULL);
2050 break;
2051 default:
2052 break;
2053 }
2054
2055 return 0;
2056 }
2057
2058 /*
2059 * Reads current event mask from firmware, and updates
2060 * hotkey_acpi_mask accordingly. Also resets any bits
2061 * from hotkey_user_mask that are unavailable to be
2062 * delivered (shadow requirement of the userspace ABI).
2063 */
hotkey_mask_get(void)2064 static int hotkey_mask_get(void)
2065 {
2066 lockdep_assert_held(&hotkey_mutex);
2067
2068 if (tp_features.hotkey_mask) {
2069 u32 m = 0;
2070
2071 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2072 return -EIO;
2073
2074 hotkey_acpi_mask = m;
2075 } else {
2076 /* no mask support doesn't mean no event support... */
2077 hotkey_acpi_mask = hotkey_all_mask;
2078 }
2079
2080 /* sync userspace-visible mask */
2081 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2082
2083 return 0;
2084 }
2085
hotkey_mask_warn_incomplete_mask(void)2086 static void hotkey_mask_warn_incomplete_mask(void)
2087 {
2088 /* log only what the user can fix... */
2089 const u32 wantedmask = hotkey_driver_mask &
2090 ~(hotkey_acpi_mask | hotkey_source_mask) &
2091 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2092
2093 if (wantedmask)
2094 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2095 }
2096
2097 /*
2098 * Set the firmware mask when supported
2099 *
2100 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2101 *
2102 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2103 */
hotkey_mask_set(u32 mask)2104 static int hotkey_mask_set(u32 mask)
2105 {
2106 int i;
2107 int rc = 0;
2108
2109 const u32 fwmask = mask & ~hotkey_source_mask;
2110
2111 lockdep_assert_held(&hotkey_mutex);
2112
2113 if (tp_features.hotkey_mask) {
2114 for (i = 0; i < 32; i++) {
2115 if (!acpi_evalf(hkey_handle,
2116 NULL, "MHKM", "vdd", i + 1,
2117 !!(mask & (1 << i)))) {
2118 rc = -EIO;
2119 break;
2120 }
2121 }
2122 }
2123
2124 /*
2125 * We *must* make an inconditional call to hotkey_mask_get to
2126 * refresh hotkey_acpi_mask and update hotkey_user_mask
2127 *
2128 * Take the opportunity to also log when we cannot _enable_
2129 * a given event.
2130 */
2131 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2132 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n",
2133 fwmask, hotkey_acpi_mask);
2134 }
2135
2136 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2137 hotkey_mask_warn_incomplete_mask();
2138
2139 return rc;
2140 }
2141
2142 /*
2143 * Sets hotkey_user_mask and tries to set the firmware mask
2144 */
hotkey_user_mask_set(const u32 mask)2145 static int hotkey_user_mask_set(const u32 mask)
2146 {
2147 int rc;
2148
2149 lockdep_assert_held(&hotkey_mutex);
2150
2151 /* Give people a chance to notice they are doing something that
2152 * is bound to go boom on their users sooner or later */
2153 if (!tp_warned.hotkey_mask_ff &&
2154 (mask == 0xffff || mask == 0xffffff ||
2155 mask == 0xffffffff)) {
2156 tp_warned.hotkey_mask_ff = 1;
2157 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n",
2158 mask);
2159 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n");
2160 }
2161
2162 /* Try to enable what the user asked for, plus whatever we need.
2163 * this syncs everything but won't enable bits in hotkey_user_mask */
2164 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2165
2166 /* Enable the available bits in hotkey_user_mask */
2167 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2168
2169 return rc;
2170 }
2171
2172 /*
2173 * Sets the driver hotkey mask.
2174 *
2175 * Can be called even if the hotkey subdriver is inactive
2176 */
tpacpi_hotkey_driver_mask_set(const u32 mask)2177 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2178 {
2179 int rc;
2180
2181 /* Do the right thing if hotkey_init has not been called yet */
2182 if (!tp_features.hotkey) {
2183 hotkey_driver_mask = mask;
2184 return 0;
2185 }
2186
2187 mutex_lock(&hotkey_mutex);
2188
2189 HOTKEY_CONFIG_CRITICAL_START
2190 hotkey_driver_mask = mask;
2191 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2192 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2193 #endif
2194 HOTKEY_CONFIG_CRITICAL_END
2195
2196 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2197 ~hotkey_source_mask);
2198 hotkey_poll_setup(true);
2199
2200 mutex_unlock(&hotkey_mutex);
2201
2202 return rc;
2203 }
2204
hotkey_status_get(int * status)2205 static int hotkey_status_get(int *status)
2206 {
2207 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2208 return -EIO;
2209
2210 return 0;
2211 }
2212
hotkey_status_set(bool enable)2213 static int hotkey_status_set(bool enable)
2214 {
2215 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2216 return -EIO;
2217
2218 return 0;
2219 }
2220
tpacpi_input_send_tabletsw(void)2221 static void tpacpi_input_send_tabletsw(void)
2222 {
2223 int state;
2224
2225 if (tp_features.hotkey_tablet &&
2226 !hotkey_get_tablet_mode(&state)) {
2227 mutex_lock(&tpacpi_inputdev_send_mutex);
2228
2229 input_report_switch(tpacpi_inputdev,
2230 SW_TABLET_MODE, !!state);
2231 input_sync(tpacpi_inputdev);
2232
2233 mutex_unlock(&tpacpi_inputdev_send_mutex);
2234 }
2235 }
2236
2237 /* Do NOT call without validating scancode first */
tpacpi_input_send_key(const unsigned int scancode)2238 static void tpacpi_input_send_key(const unsigned int scancode)
2239 {
2240 const unsigned int keycode = hotkey_keycode_map[scancode];
2241
2242 if (keycode != KEY_RESERVED) {
2243 mutex_lock(&tpacpi_inputdev_send_mutex);
2244
2245 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2246 input_report_key(tpacpi_inputdev, keycode, 1);
2247 input_sync(tpacpi_inputdev);
2248
2249 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2250 input_report_key(tpacpi_inputdev, keycode, 0);
2251 input_sync(tpacpi_inputdev);
2252
2253 mutex_unlock(&tpacpi_inputdev_send_mutex);
2254 }
2255 }
2256
2257 /* Do NOT call without validating scancode first */
tpacpi_input_send_key_masked(const unsigned int scancode)2258 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2259 {
2260 hotkey_driver_event(scancode);
2261 if (hotkey_user_mask & (1 << scancode))
2262 tpacpi_input_send_key(scancode);
2263 }
2264
2265 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2266 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2267
2268 /* Do NOT call without validating scancode first */
tpacpi_hotkey_send_key(unsigned int scancode)2269 static void tpacpi_hotkey_send_key(unsigned int scancode)
2270 {
2271 tpacpi_input_send_key_masked(scancode);
2272 }
2273
hotkey_read_nvram(struct tp_nvram_state * n,const u32 m)2274 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2275 {
2276 u8 d;
2277
2278 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2279 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2280 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2281 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2282 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2283 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2284 }
2285 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) {
2286 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2287 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2288 }
2289 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2290 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2291 n->displayexp_toggle =
2292 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2293 }
2294 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2295 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2296 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2297 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2298 n->brightness_toggle =
2299 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2300 }
2301 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2302 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2303 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2304 >> TP_NVRAM_POS_LEVEL_VOLUME;
2305 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2306 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2307 }
2308 }
2309
2310 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2311 do { \
2312 if ((event_mask & (1 << __scancode)) && \
2313 oldn->__member != newn->__member) \
2314 tpacpi_hotkey_send_key(__scancode); \
2315 } while (0)
2316
2317 #define TPACPI_MAY_SEND_KEY(__scancode) \
2318 do { \
2319 if (event_mask & (1 << __scancode)) \
2320 tpacpi_hotkey_send_key(__scancode); \
2321 } while (0)
2322
issue_volchange(const unsigned int oldvol,const unsigned int newvol,const u32 event_mask)2323 static void issue_volchange(const unsigned int oldvol,
2324 const unsigned int newvol,
2325 const u32 event_mask)
2326 {
2327 unsigned int i = oldvol;
2328
2329 while (i > newvol) {
2330 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2331 i--;
2332 }
2333 while (i < newvol) {
2334 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2335 i++;
2336 }
2337 }
2338
issue_brightnesschange(const unsigned int oldbrt,const unsigned int newbrt,const u32 event_mask)2339 static void issue_brightnesschange(const unsigned int oldbrt,
2340 const unsigned int newbrt,
2341 const u32 event_mask)
2342 {
2343 unsigned int i = oldbrt;
2344
2345 while (i > newbrt) {
2346 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2347 i--;
2348 }
2349 while (i < newbrt) {
2350 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2351 i++;
2352 }
2353 }
2354
hotkey_compare_and_issue_event(struct tp_nvram_state * oldn,struct tp_nvram_state * newn,const u32 event_mask)2355 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2356 struct tp_nvram_state *newn,
2357 const u32 event_mask)
2358 {
2359
2360 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2361 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2362 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2363 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2364
2365 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2366
2367 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2368
2369 /*
2370 * Handle volume
2371 *
2372 * This code is supposed to duplicate the IBM firmware behaviour:
2373 * - Pressing MUTE issues mute hotkey message, even when already mute
2374 * - Pressing Volume up/down issues volume up/down hotkey messages,
2375 * even when already at maximum or minimum volume
2376 * - The act of unmuting issues volume up/down notification,
2377 * depending which key was used to unmute
2378 *
2379 * We are constrained to what the NVRAM can tell us, which is not much
2380 * and certainly not enough if more than one volume hotkey was pressed
2381 * since the last poll cycle.
2382 *
2383 * Just to make our life interesting, some newer Lenovo ThinkPads have
2384 * bugs in the BIOS and may fail to update volume_toggle properly.
2385 */
2386 if (newn->mute) {
2387 /* muted */
2388 if (!oldn->mute ||
2389 oldn->volume_toggle != newn->volume_toggle ||
2390 oldn->volume_level != newn->volume_level) {
2391 /* recently muted, or repeated mute keypress, or
2392 * multiple presses ending in mute */
2393 issue_volchange(oldn->volume_level, newn->volume_level,
2394 event_mask);
2395 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2396 }
2397 } else {
2398 /* unmute */
2399 if (oldn->mute) {
2400 /* recently unmuted, issue 'unmute' keypress */
2401 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2402 }
2403 if (oldn->volume_level != newn->volume_level) {
2404 issue_volchange(oldn->volume_level, newn->volume_level,
2405 event_mask);
2406 } else if (oldn->volume_toggle != newn->volume_toggle) {
2407 /* repeated vol up/down keypress at end of scale ? */
2408 if (newn->volume_level == 0)
2409 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2410 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2411 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2412 }
2413 }
2414
2415 /* handle brightness */
2416 if (oldn->brightness_level != newn->brightness_level) {
2417 issue_brightnesschange(oldn->brightness_level,
2418 newn->brightness_level, event_mask);
2419 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2420 /* repeated key presses that didn't change state */
2421 if (newn->brightness_level == 0)
2422 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2423 else if (newn->brightness_level >= bright_maxlvl
2424 && !tp_features.bright_unkfw)
2425 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2426 }
2427
2428 #undef TPACPI_COMPARE_KEY
2429 #undef TPACPI_MAY_SEND_KEY
2430 }
2431
2432 /*
2433 * Polling driver
2434 *
2435 * We track all events in hotkey_source_mask all the time, since
2436 * most of them are edge-based. We only issue those requested by
2437 * hotkey_user_mask or hotkey_driver_mask, though.
2438 */
hotkey_kthread(void * data)2439 static int hotkey_kthread(void *data)
2440 {
2441 struct tp_nvram_state s[2] = { 0 };
2442 u32 poll_mask, event_mask;
2443 unsigned int si, so;
2444 unsigned long t;
2445 unsigned int change_detector;
2446 unsigned int poll_freq;
2447 bool was_frozen;
2448
2449 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2450 goto exit;
2451
2452 set_freezable();
2453
2454 so = 0;
2455 si = 1;
2456 t = 0;
2457
2458 /* Initial state for compares */
2459 mutex_lock(&hotkey_thread_data_mutex);
2460 change_detector = hotkey_config_change;
2461 poll_mask = hotkey_source_mask;
2462 event_mask = hotkey_source_mask &
2463 (hotkey_driver_mask | hotkey_user_mask);
2464 poll_freq = hotkey_poll_freq;
2465 mutex_unlock(&hotkey_thread_data_mutex);
2466 hotkey_read_nvram(&s[so], poll_mask);
2467
2468 while (!kthread_should_stop()) {
2469 if (t == 0) {
2470 if (likely(poll_freq))
2471 t = 1000/poll_freq;
2472 else
2473 t = 100; /* should never happen... */
2474 }
2475 t = msleep_interruptible(t);
2476 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2477 break;
2478
2479 if (t > 0 && !was_frozen)
2480 continue;
2481
2482 mutex_lock(&hotkey_thread_data_mutex);
2483 if (was_frozen || hotkey_config_change != change_detector) {
2484 /* forget old state on thaw or config change */
2485 si = so;
2486 t = 0;
2487 change_detector = hotkey_config_change;
2488 }
2489 poll_mask = hotkey_source_mask;
2490 event_mask = hotkey_source_mask &
2491 (hotkey_driver_mask | hotkey_user_mask);
2492 poll_freq = hotkey_poll_freq;
2493 mutex_unlock(&hotkey_thread_data_mutex);
2494
2495 if (likely(poll_mask)) {
2496 hotkey_read_nvram(&s[si], poll_mask);
2497 if (likely(si != so)) {
2498 hotkey_compare_and_issue_event(&s[so], &s[si],
2499 event_mask);
2500 }
2501 }
2502
2503 so = si;
2504 si ^= 1;
2505 }
2506
2507 exit:
2508 return 0;
2509 }
2510
hotkey_poll_stop_sync(void)2511 static void hotkey_poll_stop_sync(void)
2512 {
2513 lockdep_assert_held(&hotkey_mutex);
2514
2515 if (tpacpi_hotkey_task) {
2516 kthread_stop(tpacpi_hotkey_task);
2517 tpacpi_hotkey_task = NULL;
2518 }
2519 }
2520
hotkey_poll_setup(const bool may_warn)2521 static void hotkey_poll_setup(const bool may_warn)
2522 {
2523 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2524 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2525
2526 lockdep_assert_held(&hotkey_mutex);
2527
2528 if (hotkey_poll_freq > 0 &&
2529 (poll_driver_mask ||
2530 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2531 if (!tpacpi_hotkey_task) {
2532 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2533 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2534 if (IS_ERR(tpacpi_hotkey_task)) {
2535 tpacpi_hotkey_task = NULL;
2536 pr_err("could not create kernel thread for hotkey polling\n");
2537 }
2538 }
2539 } else {
2540 hotkey_poll_stop_sync();
2541 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2542 hotkey_poll_freq == 0) {
2543 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n",
2544 poll_user_mask, poll_driver_mask);
2545 }
2546 }
2547 }
2548
hotkey_poll_setup_safe(const bool may_warn)2549 static void hotkey_poll_setup_safe(const bool may_warn)
2550 {
2551 mutex_lock(&hotkey_mutex);
2552 hotkey_poll_setup(may_warn);
2553 mutex_unlock(&hotkey_mutex);
2554 }
2555
hotkey_poll_set_freq(unsigned int freq)2556 static void hotkey_poll_set_freq(unsigned int freq)
2557 {
2558 lockdep_assert_held(&hotkey_mutex);
2559
2560 if (!freq)
2561 hotkey_poll_stop_sync();
2562
2563 hotkey_poll_freq = freq;
2564 }
2565
2566 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2567
hotkey_poll_setup(const bool __unused)2568 static void hotkey_poll_setup(const bool __unused)
2569 {
2570 }
2571
hotkey_poll_setup_safe(const bool __unused)2572 static void hotkey_poll_setup_safe(const bool __unused)
2573 {
2574 }
2575
2576 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2577
hotkey_inputdev_open(struct input_dev * dev)2578 static int hotkey_inputdev_open(struct input_dev *dev)
2579 {
2580 switch (tpacpi_lifecycle) {
2581 case TPACPI_LIFE_INIT:
2582 case TPACPI_LIFE_RUNNING:
2583 hotkey_poll_setup_safe(false);
2584 return 0;
2585 case TPACPI_LIFE_EXITING:
2586 return -EBUSY;
2587 }
2588
2589 /* Should only happen if tpacpi_lifecycle is corrupt */
2590 BUG();
2591 return -EBUSY;
2592 }
2593
hotkey_inputdev_close(struct input_dev * dev)2594 static void hotkey_inputdev_close(struct input_dev *dev)
2595 {
2596 /* disable hotkey polling when possible */
2597 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2598 !(hotkey_source_mask & hotkey_driver_mask))
2599 hotkey_poll_setup_safe(false);
2600 }
2601
2602 /* sysfs hotkey enable ------------------------------------------------- */
hotkey_enable_show(struct device * dev,struct device_attribute * attr,char * buf)2603 static ssize_t hotkey_enable_show(struct device *dev,
2604 struct device_attribute *attr,
2605 char *buf)
2606 {
2607 int res, status;
2608
2609 printk_deprecated_attribute("hotkey_enable",
2610 "Hotkey reporting is always enabled");
2611
2612 res = hotkey_status_get(&status);
2613 if (res)
2614 return res;
2615
2616 return sysfs_emit(buf, "%d\n", status);
2617 }
2618
hotkey_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2619 static ssize_t hotkey_enable_store(struct device *dev,
2620 struct device_attribute *attr,
2621 const char *buf, size_t count)
2622 {
2623 unsigned long t;
2624
2625 printk_deprecated_attribute("hotkey_enable",
2626 "Hotkeys can be disabled through hotkey_mask");
2627
2628 if (parse_strtoul(buf, 1, &t))
2629 return -EINVAL;
2630
2631 if (t == 0)
2632 return -EPERM;
2633
2634 return count;
2635 }
2636
2637 static DEVICE_ATTR_RW(hotkey_enable);
2638
2639 /* sysfs hotkey mask --------------------------------------------------- */
hotkey_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2640 static ssize_t hotkey_mask_show(struct device *dev,
2641 struct device_attribute *attr,
2642 char *buf)
2643 {
2644 return sysfs_emit(buf, "0x%08x\n", hotkey_user_mask);
2645 }
2646
hotkey_mask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2647 static ssize_t hotkey_mask_store(struct device *dev,
2648 struct device_attribute *attr,
2649 const char *buf, size_t count)
2650 {
2651 unsigned long t;
2652 int res;
2653
2654 if (parse_strtoul(buf, 0xffffffffUL, &t))
2655 return -EINVAL;
2656
2657 if (mutex_lock_killable(&hotkey_mutex))
2658 return -ERESTARTSYS;
2659
2660 res = hotkey_user_mask_set(t);
2661
2662 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2663 hotkey_poll_setup(true);
2664 #endif
2665
2666 mutex_unlock(&hotkey_mutex);
2667
2668 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2669
2670 return (res) ? res : count;
2671 }
2672
2673 static DEVICE_ATTR_RW(hotkey_mask);
2674
2675 /* sysfs hotkey bios_enabled ------------------------------------------- */
hotkey_bios_enabled_show(struct device * dev,struct device_attribute * attr,char * buf)2676 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2677 struct device_attribute *attr,
2678 char *buf)
2679 {
2680 return sprintf(buf, "0\n");
2681 }
2682
2683 static DEVICE_ATTR_RO(hotkey_bios_enabled);
2684
2685 /* sysfs hotkey bios_mask ---------------------------------------------- */
hotkey_bios_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2686 static ssize_t hotkey_bios_mask_show(struct device *dev,
2687 struct device_attribute *attr,
2688 char *buf)
2689 {
2690 printk_deprecated_attribute("hotkey_bios_mask",
2691 "This attribute is useless.");
2692 return sysfs_emit(buf, "0x%08x\n", hotkey_orig_mask);
2693 }
2694
2695 static DEVICE_ATTR_RO(hotkey_bios_mask);
2696
2697 /* sysfs hotkey all_mask ----------------------------------------------- */
hotkey_all_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2698 static ssize_t hotkey_all_mask_show(struct device *dev,
2699 struct device_attribute *attr,
2700 char *buf)
2701 {
2702 return sysfs_emit(buf, "0x%08x\n",
2703 hotkey_all_mask | hotkey_source_mask);
2704 }
2705
2706 static DEVICE_ATTR_RO(hotkey_all_mask);
2707
2708 /* sysfs hotkey all_mask ----------------------------------------------- */
hotkey_adaptive_all_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2709 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev,
2710 struct device_attribute *attr,
2711 char *buf)
2712 {
2713 return sysfs_emit(buf, "0x%08x\n",
2714 hotkey_adaptive_all_mask | hotkey_source_mask);
2715 }
2716
2717 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask);
2718
2719 /* sysfs hotkey recommended_mask --------------------------------------- */
hotkey_recommended_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2720 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2721 struct device_attribute *attr,
2722 char *buf)
2723 {
2724 return sysfs_emit(buf, "0x%08x\n",
2725 (hotkey_all_mask | hotkey_source_mask)
2726 & ~hotkey_reserved_mask);
2727 }
2728
2729 static DEVICE_ATTR_RO(hotkey_recommended_mask);
2730
2731 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2732
2733 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
hotkey_source_mask_show(struct device * dev,struct device_attribute * attr,char * buf)2734 static ssize_t hotkey_source_mask_show(struct device *dev,
2735 struct device_attribute *attr,
2736 char *buf)
2737 {
2738 return sysfs_emit(buf, "0x%08x\n", hotkey_source_mask);
2739 }
2740
hotkey_source_mask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2741 static ssize_t hotkey_source_mask_store(struct device *dev,
2742 struct device_attribute *attr,
2743 const char *buf, size_t count)
2744 {
2745 unsigned long t;
2746 u32 r_ev;
2747 int rc;
2748
2749 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2750 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2751 return -EINVAL;
2752
2753 if (mutex_lock_killable(&hotkey_mutex))
2754 return -ERESTARTSYS;
2755
2756 HOTKEY_CONFIG_CRITICAL_START
2757 hotkey_source_mask = t;
2758 HOTKEY_CONFIG_CRITICAL_END
2759
2760 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2761 ~hotkey_source_mask);
2762 hotkey_poll_setup(true);
2763
2764 /* check if events needed by the driver got disabled */
2765 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2766 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2767
2768 mutex_unlock(&hotkey_mutex);
2769
2770 if (rc < 0)
2771 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n");
2772
2773 if (r_ev)
2774 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n",
2775 r_ev);
2776
2777 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2778
2779 return (rc < 0) ? rc : count;
2780 }
2781
2782 static DEVICE_ATTR_RW(hotkey_source_mask);
2783
2784 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
hotkey_poll_freq_show(struct device * dev,struct device_attribute * attr,char * buf)2785 static ssize_t hotkey_poll_freq_show(struct device *dev,
2786 struct device_attribute *attr,
2787 char *buf)
2788 {
2789 return sysfs_emit(buf, "%d\n", hotkey_poll_freq);
2790 }
2791
hotkey_poll_freq_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2792 static ssize_t hotkey_poll_freq_store(struct device *dev,
2793 struct device_attribute *attr,
2794 const char *buf, size_t count)
2795 {
2796 unsigned long t;
2797
2798 if (parse_strtoul(buf, 25, &t))
2799 return -EINVAL;
2800
2801 if (mutex_lock_killable(&hotkey_mutex))
2802 return -ERESTARTSYS;
2803
2804 hotkey_poll_set_freq(t);
2805 hotkey_poll_setup(true);
2806
2807 mutex_unlock(&hotkey_mutex);
2808
2809 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2810
2811 return count;
2812 }
2813
2814 static DEVICE_ATTR_RW(hotkey_poll_freq);
2815
2816 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2817
2818 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
hotkey_radio_sw_show(struct device * dev,struct device_attribute * attr,char * buf)2819 static ssize_t hotkey_radio_sw_show(struct device *dev,
2820 struct device_attribute *attr,
2821 char *buf)
2822 {
2823 int res;
2824 res = hotkey_get_wlsw();
2825 if (res < 0)
2826 return res;
2827
2828 /* Opportunistic update */
2829 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2830
2831 return sysfs_emit(buf, "%d\n",
2832 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2833 }
2834
2835 static DEVICE_ATTR_RO(hotkey_radio_sw);
2836
hotkey_radio_sw_notify_change(void)2837 static void hotkey_radio_sw_notify_change(void)
2838 {
2839 if (tp_features.hotkey_wlsw)
2840 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2841 "hotkey_radio_sw");
2842 }
2843
2844 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
hotkey_tablet_mode_show(struct device * dev,struct device_attribute * attr,char * buf)2845 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2846 struct device_attribute *attr,
2847 char *buf)
2848 {
2849 int res, s;
2850 res = hotkey_get_tablet_mode(&s);
2851 if (res < 0)
2852 return res;
2853
2854 return sysfs_emit(buf, "%d\n", !!s);
2855 }
2856
2857 static DEVICE_ATTR_RO(hotkey_tablet_mode);
2858
hotkey_tablet_mode_notify_change(void)2859 static void hotkey_tablet_mode_notify_change(void)
2860 {
2861 if (tp_features.hotkey_tablet)
2862 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2863 "hotkey_tablet_mode");
2864 }
2865
2866 /* sysfs wakeup reason (pollable) -------------------------------------- */
hotkey_wakeup_reason_show(struct device * dev,struct device_attribute * attr,char * buf)2867 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2868 struct device_attribute *attr,
2869 char *buf)
2870 {
2871 return sysfs_emit(buf, "%d\n", hotkey_wakeup_reason);
2872 }
2873
2874 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2875
hotkey_wakeup_reason_notify_change(void)2876 static void hotkey_wakeup_reason_notify_change(void)
2877 {
2878 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2879 "wakeup_reason");
2880 }
2881
2882 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
hotkey_wakeup_hotunplug_complete_show(struct device * dev,struct device_attribute * attr,char * buf)2883 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2884 struct device_attribute *attr,
2885 char *buf)
2886 {
2887 return sysfs_emit(buf, "%d\n", hotkey_autosleep_ack);
2888 }
2889
2890 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
2891 hotkey_wakeup_hotunplug_complete_show, NULL);
2892
hotkey_wakeup_hotunplug_complete_notify_change(void)2893 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2894 {
2895 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2896 "wakeup_hotunplug_complete");
2897 }
2898
2899 /* sysfs adaptive kbd mode --------------------------------------------- */
2900
2901 static int adaptive_keyboard_get_mode(void);
2902 static int adaptive_keyboard_set_mode(int new_mode);
2903
2904 enum ADAPTIVE_KEY_MODE {
2905 HOME_MODE,
2906 WEB_BROWSER_MODE,
2907 WEB_CONFERENCE_MODE,
2908 FUNCTION_MODE,
2909 LAYFLAT_MODE
2910 };
2911
adaptive_kbd_mode_show(struct device * dev,struct device_attribute * attr,char * buf)2912 static ssize_t adaptive_kbd_mode_show(struct device *dev,
2913 struct device_attribute *attr,
2914 char *buf)
2915 {
2916 int current_mode;
2917
2918 current_mode = adaptive_keyboard_get_mode();
2919 if (current_mode < 0)
2920 return current_mode;
2921
2922 return sysfs_emit(buf, "%d\n", current_mode);
2923 }
2924
adaptive_kbd_mode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)2925 static ssize_t adaptive_kbd_mode_store(struct device *dev,
2926 struct device_attribute *attr,
2927 const char *buf, size_t count)
2928 {
2929 unsigned long t;
2930 int res;
2931
2932 if (parse_strtoul(buf, LAYFLAT_MODE, &t))
2933 return -EINVAL;
2934
2935 res = adaptive_keyboard_set_mode(t);
2936 return (res < 0) ? res : count;
2937 }
2938
2939 static DEVICE_ATTR_RW(adaptive_kbd_mode);
2940
2941 static struct attribute *adaptive_kbd_attributes[] = {
2942 &dev_attr_adaptive_kbd_mode.attr,
2943 NULL
2944 };
2945
hadaptive_kbd_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)2946 static umode_t hadaptive_kbd_attr_is_visible(struct kobject *kobj,
2947 struct attribute *attr, int n)
2948 {
2949 return tp_features.has_adaptive_kbd ? attr->mode : 0;
2950 }
2951
2952 static const struct attribute_group adaptive_kbd_attr_group = {
2953 .is_visible = hadaptive_kbd_attr_is_visible,
2954 .attrs = adaptive_kbd_attributes,
2955 };
2956
2957 /* --------------------------------------------------------------------- */
2958
2959 static struct attribute *hotkey_attributes[] = {
2960 &dev_attr_hotkey_enable.attr,
2961 &dev_attr_hotkey_bios_enabled.attr,
2962 &dev_attr_hotkey_bios_mask.attr,
2963 &dev_attr_wakeup_reason.attr,
2964 &dev_attr_wakeup_hotunplug_complete.attr,
2965 &dev_attr_hotkey_mask.attr,
2966 &dev_attr_hotkey_all_mask.attr,
2967 &dev_attr_hotkey_adaptive_all_mask.attr,
2968 &dev_attr_hotkey_recommended_mask.attr,
2969 &dev_attr_hotkey_tablet_mode.attr,
2970 &dev_attr_hotkey_radio_sw.attr,
2971 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2972 &dev_attr_hotkey_source_mask.attr,
2973 &dev_attr_hotkey_poll_freq.attr,
2974 #endif
2975 NULL
2976 };
2977
hotkey_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)2978 static umode_t hotkey_attr_is_visible(struct kobject *kobj,
2979 struct attribute *attr, int n)
2980 {
2981 if (attr == &dev_attr_hotkey_tablet_mode.attr) {
2982 if (!tp_features.hotkey_tablet)
2983 return 0;
2984 } else if (attr == &dev_attr_hotkey_radio_sw.attr) {
2985 if (!tp_features.hotkey_wlsw)
2986 return 0;
2987 }
2988
2989 return attr->mode;
2990 }
2991
2992 static const struct attribute_group hotkey_attr_group = {
2993 .is_visible = hotkey_attr_is_visible,
2994 .attrs = hotkey_attributes,
2995 };
2996
2997 /*
2998 * Sync both the hw and sw blocking state of all switches
2999 */
tpacpi_send_radiosw_update(void)3000 static void tpacpi_send_radiosw_update(void)
3001 {
3002 int wlsw;
3003
3004 /*
3005 * We must sync all rfkill controllers *before* issuing any
3006 * rfkill input events, or we will race the rfkill core input
3007 * handler.
3008 *
3009 * tpacpi_inputdev_send_mutex works as a synchronization point
3010 * for the above.
3011 *
3012 * We optimize to avoid numerous calls to hotkey_get_wlsw.
3013 */
3014
3015 wlsw = hotkey_get_wlsw();
3016
3017 /* Sync hw blocking state first if it is hw-blocked */
3018 if (wlsw == TPACPI_RFK_RADIO_OFF)
3019 tpacpi_rfk_update_hwblock_state(true);
3020
3021 /* Sync hw blocking state last if it is hw-unblocked */
3022 if (wlsw == TPACPI_RFK_RADIO_ON)
3023 tpacpi_rfk_update_hwblock_state(false);
3024
3025 /* Issue rfkill input event for WLSW switch */
3026 if (!(wlsw < 0)) {
3027 mutex_lock(&tpacpi_inputdev_send_mutex);
3028
3029 input_report_switch(tpacpi_inputdev,
3030 SW_RFKILL_ALL, (wlsw > 0));
3031 input_sync(tpacpi_inputdev);
3032
3033 mutex_unlock(&tpacpi_inputdev_send_mutex);
3034 }
3035
3036 /*
3037 * this can be unconditional, as we will poll state again
3038 * if userspace uses the notify to read data
3039 */
3040 hotkey_radio_sw_notify_change();
3041 }
3042
hotkey_exit(void)3043 static void hotkey_exit(void)
3044 {
3045 mutex_lock(&hotkey_mutex);
3046 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3047 hotkey_poll_stop_sync();
3048 #endif
3049 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3050 "restoring original HKEY status and mask\n");
3051 /* yes, there is a bitwise or below, we want the
3052 * functions to be called even if one of them fail */
3053 if (((tp_features.hotkey_mask &&
3054 hotkey_mask_set(hotkey_orig_mask)) |
3055 hotkey_status_set(false)) != 0)
3056 pr_err("failed to restore hot key mask to BIOS defaults\n");
3057
3058 mutex_unlock(&hotkey_mutex);
3059 }
3060
hotkey_unmap(const unsigned int scancode)3061 static void __init hotkey_unmap(const unsigned int scancode)
3062 {
3063 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3064 clear_bit(hotkey_keycode_map[scancode],
3065 tpacpi_inputdev->keybit);
3066 hotkey_keycode_map[scancode] = KEY_RESERVED;
3067 }
3068 }
3069
3070 /*
3071 * HKEY quirks:
3072 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3073 */
3074
3075 #define TPACPI_HK_Q_INIMASK 0x0001
3076
3077 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3078 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3079 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3080 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3081 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3082 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3083 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3084 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3085 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3086 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3087 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3088 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3089 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3090 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3091 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3092 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3093 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3094 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3095 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3096 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3097 };
3098
3099 typedef u16 tpacpi_keymap_entry_t;
3100 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3101
hotkey_init_tablet_mode(void)3102 static int hotkey_init_tablet_mode(void)
3103 {
3104 int in_tablet_mode = 0, res;
3105 char *type = NULL;
3106
3107 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) {
3108 int has_tablet_mode;
3109
3110 in_tablet_mode = hotkey_gmms_get_tablet_mode(res,
3111 &has_tablet_mode);
3112 /*
3113 * The Yoga 11e series has 2 accelerometers described by a
3114 * BOSC0200 ACPI node. This setup relies on a Windows service
3115 * which calls special ACPI methods on this node to report
3116 * the laptop/tent/tablet mode to the EC. The bmc150 iio driver
3117 * does not support this, so skip the hotkey on these models.
3118 */
3119 if (has_tablet_mode && !dual_accel_detect())
3120 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS;
3121 type = "GMMS";
3122 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
3123 /* For X41t, X60t, X61t Tablets... */
3124 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
3125 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
3126 type = "MHKG";
3127 }
3128
3129 if (!tp_features.hotkey_tablet)
3130 return 0;
3131
3132 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
3133 type, in_tablet_mode ? "tablet" : "laptop");
3134
3135 return in_tablet_mode;
3136 }
3137
hotkey_init(struct ibm_init_struct * iibm)3138 static int __init hotkey_init(struct ibm_init_struct *iibm)
3139 {
3140 /* Requirements for changing the default keymaps:
3141 *
3142 * 1. Many of the keys are mapped to KEY_RESERVED for very
3143 * good reasons. Do not change them unless you have deep
3144 * knowledge on the IBM and Lenovo ThinkPad firmware for
3145 * the various ThinkPad models. The driver behaves
3146 * differently for KEY_RESERVED: such keys have their
3147 * hot key mask *unset* in mask_recommended, and also
3148 * in the initial hot key mask programmed into the
3149 * firmware at driver load time, which means the firm-
3150 * ware may react very differently if you change them to
3151 * something else;
3152 *
3153 * 2. You must be subscribed to the linux-thinkpad and
3154 * ibm-acpi-devel mailing lists, and you should read the
3155 * list archives since 2007 if you want to change the
3156 * keymaps. This requirement exists so that you will
3157 * know the past history of problems with the thinkpad-
3158 * acpi driver keymaps, and also that you will be
3159 * listening to any bug reports;
3160 *
3161 * 3. Do not send thinkpad-acpi specific patches directly to
3162 * for merging, *ever*. Send them to the linux-acpi
3163 * mailinglist for comments. Merging is to be done only
3164 * through acpi-test and the ACPI maintainer.
3165 *
3166 * If the above is too much to ask, don't change the keymap.
3167 * Ask the thinkpad-acpi maintainer to do it, instead.
3168 */
3169
3170 enum keymap_index {
3171 TPACPI_KEYMAP_IBM_GENERIC = 0,
3172 TPACPI_KEYMAP_LENOVO_GENERIC,
3173 };
3174
3175 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3176 /* Generic keymap for IBM ThinkPads */
3177 [TPACPI_KEYMAP_IBM_GENERIC] = {
3178 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3179 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3180 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3181 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3182
3183 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3184 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3185 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3186 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3187
3188 /* brightness: firmware always reacts to them */
3189 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3190 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3191
3192 /* Thinklight: firmware always react to it */
3193 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3194
3195 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3196 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3197
3198 /* Volume: firmware always react to it and reprograms
3199 * the built-in *extra* mixer. Never map it to control
3200 * another mixer by default. */
3201 KEY_RESERVED, /* 0x14: VOLUME UP */
3202 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3203 KEY_RESERVED, /* 0x16: MUTE */
3204
3205 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3206
3207 /* (assignments unknown, please report if found) */
3208 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3209 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3210
3211 /* No assignments, only used for Adaptive keyboards. */
3212 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3213 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3214 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3215 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3216 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3217
3218 /* No assignment, used for newer Lenovo models */
3219 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3220 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3221 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3222 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3223 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3224 KEY_UNKNOWN, KEY_UNKNOWN
3225
3226 },
3227
3228 /* Generic keymap for Lenovo ThinkPads */
3229 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3230 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3231 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3232 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3233 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3234
3235 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3236 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3237 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3238 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3239
3240 /* These should be enabled --only-- when ACPI video
3241 * is disabled (i.e. in "vendor" mode), and are handled
3242 * in a special way by the init code */
3243 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3244 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3245
3246 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3247
3248 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3249 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3250
3251 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3252 * react to it and reprograms the built-in *extra* mixer.
3253 * Never map it to control another mixer by default.
3254 *
3255 * T60?, T61, R60?, R61: firmware and EC tries to send
3256 * these over the regular keyboard, so these are no-ops,
3257 * but there are still weird bugs re. MUTE, so do not
3258 * change unless you get test reports from all Lenovo
3259 * models. May cause the BIOS to interfere with the
3260 * HDA mixer.
3261 */
3262 KEY_RESERVED, /* 0x14: VOLUME UP */
3263 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3264 KEY_RESERVED, /* 0x16: MUTE */
3265
3266 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3267
3268 /* (assignments unknown, please report if found) */
3269 KEY_UNKNOWN, KEY_UNKNOWN,
3270
3271 /*
3272 * The mic mute button only sends 0x1a. It does not
3273 * automatically mute the mic or change the mute light.
3274 */
3275 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3276
3277 /* (assignments unknown, please report if found) */
3278 KEY_UNKNOWN,
3279
3280 /* Extra keys in use since the X240 / T440 / T540 */
3281 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3282
3283 /*
3284 * These are the adaptive keyboard keycodes for Carbon X1 2014.
3285 * The first item in this list is the Mute button which is
3286 * emitted with 0x103 through
3287 * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3288 * symbol is held.
3289 * We'll need to offset those by 0x20.
3290 */
3291 KEY_RESERVED, /* Mute held, 0x103 */
3292 KEY_BRIGHTNESS_MIN, /* Backlight off */
3293 KEY_RESERVED, /* Clipping tool */
3294 KEY_RESERVED, /* Cloud */
3295 KEY_RESERVED,
3296 KEY_VOICECOMMAND, /* Voice */
3297 KEY_RESERVED,
3298 KEY_RESERVED, /* Gestures */
3299 KEY_RESERVED,
3300 KEY_RESERVED,
3301 KEY_RESERVED,
3302 KEY_CONFIG, /* Settings */
3303 KEY_RESERVED, /* New tab */
3304 KEY_REFRESH, /* Reload */
3305 KEY_BACK, /* Back */
3306 KEY_RESERVED, /* Microphone down */
3307 KEY_RESERVED, /* Microphone up */
3308 KEY_RESERVED, /* Microphone cancellation */
3309 KEY_RESERVED, /* Camera mode */
3310 KEY_RESERVED, /* Rotate display, 0x116 */
3311
3312 /*
3313 * These are found in 2017 models (e.g. T470s, X270).
3314 * The lowest known value is 0x311, which according to
3315 * the manual should launch a user defined favorite
3316 * application.
3317 *
3318 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START,
3319 * corresponding to 0x34.
3320 */
3321
3322 /* (assignments unknown, please report if found) */
3323 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3324 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3325 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3326 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3327 KEY_UNKNOWN,
3328
3329 KEY_BOOKMARKS, /* Favorite app, 0x311 */
3330 KEY_SELECTIVE_SCREENSHOT, /* Clipping tool */
3331 KEY_CALC, /* Calculator (above numpad, P52) */
3332 KEY_BLUETOOTH, /* Bluetooth */
3333 KEY_KEYBOARD, /* Keyboard, 0x315 */
3334 KEY_FN_RIGHT_SHIFT, /* Fn + right Shift */
3335 KEY_NOTIFICATION_CENTER, /* Notification Center */
3336 KEY_PICKUP_PHONE, /* Answer incoming call */
3337 KEY_HANGUP_PHONE, /* Decline incoming call */
3338 },
3339 };
3340
3341 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3342 /* Generic maps (fallback) */
3343 {
3344 .vendor = PCI_VENDOR_ID_IBM,
3345 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3346 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3347 },
3348 {
3349 .vendor = PCI_VENDOR_ID_LENOVO,
3350 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3351 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3352 },
3353 };
3354
3355 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3356 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3357
3358 int res, i;
3359 int status;
3360 int hkeyv;
3361 bool radiosw_state = false;
3362 bool tabletsw_state = false;
3363
3364 unsigned long quirks;
3365 unsigned long keymap_id;
3366
3367 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3368 "initializing hotkey subdriver\n");
3369
3370 BUG_ON(!tpacpi_inputdev);
3371 BUG_ON(tpacpi_inputdev->open != NULL ||
3372 tpacpi_inputdev->close != NULL);
3373
3374 TPACPI_ACPIHANDLE_INIT(hkey);
3375 mutex_init(&hotkey_mutex);
3376
3377 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3378 mutex_init(&hotkey_thread_data_mutex);
3379 #endif
3380
3381 /* hotkey not supported on 570 */
3382 tp_features.hotkey = hkey_handle != NULL;
3383
3384 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3385 "hotkeys are %s\n",
3386 str_supported(tp_features.hotkey));
3387
3388 if (!tp_features.hotkey)
3389 return -ENODEV;
3390
3391 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3392 ARRAY_SIZE(tpacpi_hotkey_qtable));
3393
3394 tpacpi_disable_brightness_delay();
3395
3396 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3397 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3398 for HKEY interface version 0x100 */
3399 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3400 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3401 "firmware HKEY interface version: 0x%x\n",
3402 hkeyv);
3403
3404 switch (hkeyv >> 8) {
3405 case 1:
3406 /*
3407 * MHKV 0x100 in A31, R40, R40e,
3408 * T4x, X31, and later
3409 */
3410
3411 /* Paranoia check AND init hotkey_all_mask */
3412 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3413 "MHKA", "qd")) {
3414 pr_err("missing MHKA handler, please report this to %s\n",
3415 TPACPI_MAIL);
3416 /* Fallback: pre-init for FN+F3,F4,F12 */
3417 hotkey_all_mask = 0x080cU;
3418 } else {
3419 tp_features.hotkey_mask = 1;
3420 }
3421 break;
3422
3423 case 2:
3424 /*
3425 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016)
3426 */
3427
3428 /* Paranoia check AND init hotkey_all_mask */
3429 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3430 "MHKA", "dd", 1)) {
3431 pr_err("missing MHKA handler, please report this to %s\n",
3432 TPACPI_MAIL);
3433 /* Fallback: pre-init for FN+F3,F4,F12 */
3434 hotkey_all_mask = 0x080cU;
3435 } else {
3436 tp_features.hotkey_mask = 1;
3437 }
3438
3439 /*
3440 * Check if we have an adaptive keyboard, like on the
3441 * Lenovo Carbon X1 2014 (2nd Gen).
3442 */
3443 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
3444 "MHKA", "dd", 2)) {
3445 if (hotkey_adaptive_all_mask != 0)
3446 tp_features.has_adaptive_kbd = true;
3447 } else {
3448 tp_features.has_adaptive_kbd = false;
3449 hotkey_adaptive_all_mask = 0x0U;
3450 }
3451 break;
3452
3453 default:
3454 pr_err("unknown version of the HKEY interface: 0x%x\n",
3455 hkeyv);
3456 pr_err("please report this to %s\n", TPACPI_MAIL);
3457 break;
3458 }
3459 }
3460
3461 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3462 "hotkey masks are %s\n",
3463 str_supported(tp_features.hotkey_mask));
3464
3465 /* Init hotkey_all_mask if not initialized yet */
3466 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3467 (quirks & TPACPI_HK_Q_INIMASK))
3468 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3469
3470 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3471 if (tp_features.hotkey_mask) {
3472 /* hotkey_source_mask *must* be zero for
3473 * the first hotkey_mask_get to return hotkey_orig_mask */
3474 mutex_lock(&hotkey_mutex);
3475 res = hotkey_mask_get();
3476 mutex_unlock(&hotkey_mutex);
3477 if (res)
3478 return res;
3479
3480 hotkey_orig_mask = hotkey_acpi_mask;
3481 } else {
3482 hotkey_orig_mask = hotkey_all_mask;
3483 hotkey_acpi_mask = hotkey_all_mask;
3484 }
3485
3486 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3487 if (dbg_wlswemul) {
3488 tp_features.hotkey_wlsw = 1;
3489 radiosw_state = !!tpacpi_wlsw_emulstate;
3490 pr_info("radio switch emulation enabled\n");
3491 } else
3492 #endif
3493 /* Not all thinkpads have a hardware radio switch */
3494 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3495 tp_features.hotkey_wlsw = 1;
3496 radiosw_state = !!status;
3497 pr_info("radio switch found; radios are %s\n", str_enabled_disabled(status & BIT(0)));
3498 }
3499
3500 tabletsw_state = hotkey_init_tablet_mode();
3501
3502 /* Set up key map */
3503 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3504 ARRAY_SIZE(tpacpi_keymap_qtable));
3505 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3506 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3507 "using keymap number %lu\n", keymap_id);
3508
3509 hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id],
3510 TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL);
3511 if (!hotkey_keycode_map) {
3512 pr_err("failed to allocate memory for key map\n");
3513 return -ENOMEM;
3514 }
3515
3516 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3517 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3518 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3519 tpacpi_inputdev->keycode = hotkey_keycode_map;
3520 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3521 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3522 input_set_capability(tpacpi_inputdev, EV_KEY,
3523 hotkey_keycode_map[i]);
3524 } else {
3525 if (i < sizeof(hotkey_reserved_mask)*8)
3526 hotkey_reserved_mask |= 1 << i;
3527 }
3528 }
3529
3530 if (tp_features.hotkey_wlsw) {
3531 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3532 input_report_switch(tpacpi_inputdev,
3533 SW_RFKILL_ALL, radiosw_state);
3534 }
3535 if (tp_features.hotkey_tablet) {
3536 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3537 input_report_switch(tpacpi_inputdev,
3538 SW_TABLET_MODE, tabletsw_state);
3539 }
3540
3541 /* Do not issue duplicate brightness change events to
3542 * userspace. tpacpi_detect_brightness_capabilities() must have
3543 * been called before this point */
3544 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3545 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
3546 pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
3547
3548 /* Disable brightness up/down on Lenovo thinkpads when
3549 * ACPI is handling them, otherwise it is plain impossible
3550 * for userspace to do something even remotely sane */
3551 hotkey_reserved_mask |=
3552 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3553 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3554 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3555 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3556 }
3557
3558 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3559 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3560 & ~hotkey_all_mask
3561 & ~hotkey_reserved_mask;
3562
3563 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3564 "hotkey source mask 0x%08x, polling freq %u\n",
3565 hotkey_source_mask, hotkey_poll_freq);
3566 #endif
3567
3568 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3569 "enabling firmware HKEY event interface...\n");
3570 res = hotkey_status_set(true);
3571 if (res) {
3572 hotkey_exit();
3573 return res;
3574 }
3575 mutex_lock(&hotkey_mutex);
3576 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3577 | hotkey_driver_mask)
3578 & ~hotkey_source_mask);
3579 mutex_unlock(&hotkey_mutex);
3580 if (res < 0 && res != -ENXIO) {
3581 hotkey_exit();
3582 return res;
3583 }
3584 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3585 & ~hotkey_reserved_mask;
3586 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3587 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3588 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3589
3590 tpacpi_inputdev->open = &hotkey_inputdev_open;
3591 tpacpi_inputdev->close = &hotkey_inputdev_close;
3592
3593 hotkey_poll_setup_safe(true);
3594
3595 return 0;
3596 }
3597
3598 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3599 * mode, Web conference mode, Function mode and Lay-flat mode.
3600 * We support Home mode and Function mode currently.
3601 *
3602 * Will consider support rest of modes in future.
3603 *
3604 */
3605 static const int adaptive_keyboard_modes[] = {
3606 HOME_MODE,
3607 /* WEB_BROWSER_MODE = 2,
3608 WEB_CONFERENCE_MODE = 3, */
3609 FUNCTION_MODE
3610 };
3611
3612 #define DFR_CHANGE_ROW 0x101
3613 #define DFR_SHOW_QUICKVIEW_ROW 0x102
3614 #define FIRST_ADAPTIVE_KEY 0x103
3615
3616 /* press Fn key a while second, it will switch to Function Mode. Then
3617 * release Fn key, previous mode be restored.
3618 */
3619 static bool adaptive_keyboard_mode_is_saved;
3620 static int adaptive_keyboard_prev_mode;
3621
adaptive_keyboard_get_mode(void)3622 static int adaptive_keyboard_get_mode(void)
3623 {
3624 int mode = 0;
3625
3626 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3627 pr_err("Cannot read adaptive keyboard mode\n");
3628 return -EIO;
3629 }
3630
3631 return mode;
3632 }
3633
adaptive_keyboard_set_mode(int new_mode)3634 static int adaptive_keyboard_set_mode(int new_mode)
3635 {
3636 if (new_mode < 0 ||
3637 new_mode > LAYFLAT_MODE)
3638 return -EINVAL;
3639
3640 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3641 pr_err("Cannot set adaptive keyboard mode\n");
3642 return -EIO;
3643 }
3644
3645 return 0;
3646 }
3647
adaptive_keyboard_get_next_mode(int mode)3648 static int adaptive_keyboard_get_next_mode(int mode)
3649 {
3650 size_t i;
3651 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3652
3653 for (i = 0; i <= max_mode; i++) {
3654 if (adaptive_keyboard_modes[i] == mode)
3655 break;
3656 }
3657
3658 if (i >= max_mode)
3659 i = 0;
3660 else
3661 i++;
3662
3663 return adaptive_keyboard_modes[i];
3664 }
3665
adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)3666 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3667 {
3668 int current_mode = 0;
3669 int new_mode = 0;
3670 int keycode;
3671
3672 switch (scancode) {
3673 case DFR_CHANGE_ROW:
3674 if (adaptive_keyboard_mode_is_saved) {
3675 new_mode = adaptive_keyboard_prev_mode;
3676 adaptive_keyboard_mode_is_saved = false;
3677 } else {
3678 current_mode = adaptive_keyboard_get_mode();
3679 if (current_mode < 0)
3680 return false;
3681 new_mode = adaptive_keyboard_get_next_mode(
3682 current_mode);
3683 }
3684
3685 if (adaptive_keyboard_set_mode(new_mode) < 0)
3686 return false;
3687
3688 return true;
3689
3690 case DFR_SHOW_QUICKVIEW_ROW:
3691 current_mode = adaptive_keyboard_get_mode();
3692 if (current_mode < 0)
3693 return false;
3694
3695 adaptive_keyboard_prev_mode = current_mode;
3696 adaptive_keyboard_mode_is_saved = true;
3697
3698 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3699 return false;
3700 return true;
3701
3702 default:
3703 if (scancode < FIRST_ADAPTIVE_KEY ||
3704 scancode >= FIRST_ADAPTIVE_KEY +
3705 TP_ACPI_HOTKEYSCAN_EXTENDED_START -
3706 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3707 pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3708 scancode);
3709 return false;
3710 }
3711 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
3712 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START];
3713 if (keycode != KEY_RESERVED) {
3714 mutex_lock(&tpacpi_inputdev_send_mutex);
3715
3716 input_report_key(tpacpi_inputdev, keycode, 1);
3717 input_sync(tpacpi_inputdev);
3718
3719 input_report_key(tpacpi_inputdev, keycode, 0);
3720 input_sync(tpacpi_inputdev);
3721
3722 mutex_unlock(&tpacpi_inputdev_send_mutex);
3723 }
3724 return true;
3725 }
3726 }
3727
hotkey_notify_extended_hotkey(const u32 hkey)3728 static bool hotkey_notify_extended_hotkey(const u32 hkey)
3729 {
3730 unsigned int scancode;
3731
3732 switch (hkey) {
3733 case TP_HKEY_EV_PRIVACYGUARD_TOGGLE:
3734 case TP_HKEY_EV_AMT_TOGGLE:
3735 tpacpi_driver_event(hkey);
3736 return true;
3737 }
3738
3739 /* Extended keycodes start at 0x300 and our offset into the map
3740 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode
3741 * will be positive, but might not be in the correct range.
3742 */
3743 scancode = (hkey & 0xfff) - (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START);
3744 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START &&
3745 scancode < TPACPI_HOTKEY_MAP_LEN) {
3746 tpacpi_input_send_key(scancode);
3747 return true;
3748 }
3749
3750 return false;
3751 }
3752
hotkey_notify_hotkey(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3753 static bool hotkey_notify_hotkey(const u32 hkey,
3754 bool *send_acpi_ev,
3755 bool *ignore_acpi_ev)
3756 {
3757 /* 0x1000-0x1FFF: key presses */
3758 unsigned int scancode = hkey & 0xfff;
3759 *send_acpi_ev = true;
3760 *ignore_acpi_ev = false;
3761
3762 /*
3763 * Original events are in the 0x10XX range, the adaptive keyboard
3764 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017
3765 * models, additional keys are emitted through 0x13XX.
3766 */
3767 switch ((hkey >> 8) & 0xf) {
3768 case 0:
3769 if (scancode > 0 &&
3770 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3771 /* HKEY event 0x1001 is scancode 0x00 */
3772 scancode--;
3773 if (!(hotkey_source_mask & (1 << scancode))) {
3774 tpacpi_input_send_key_masked(scancode);
3775 *send_acpi_ev = false;
3776 } else {
3777 *ignore_acpi_ev = true;
3778 }
3779 return true;
3780 }
3781 break;
3782
3783 case 1:
3784 return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3785
3786 case 3:
3787 return hotkey_notify_extended_hotkey(hkey);
3788 }
3789
3790 return false;
3791 }
3792
hotkey_notify_wakeup(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3793 static bool hotkey_notify_wakeup(const u32 hkey,
3794 bool *send_acpi_ev,
3795 bool *ignore_acpi_ev)
3796 {
3797 /* 0x2000-0x2FFF: Wakeup reason */
3798 *send_acpi_ev = true;
3799 *ignore_acpi_ev = false;
3800
3801 switch (hkey) {
3802 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3803 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3804 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3805 *ignore_acpi_ev = true;
3806 break;
3807
3808 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3809 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3810 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3811 *ignore_acpi_ev = true;
3812 break;
3813
3814 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3815 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3816 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3817 /* how to auto-heal: */
3818 /* 2313: woke up from S3, go to S4/S5 */
3819 /* 2413: woke up from S4, go to S5 */
3820 break;
3821
3822 default:
3823 return false;
3824 }
3825
3826 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3827 pr_info("woke up due to a hot-unplug request...\n");
3828 hotkey_wakeup_reason_notify_change();
3829 }
3830 return true;
3831 }
3832
hotkey_notify_dockevent(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3833 static bool hotkey_notify_dockevent(const u32 hkey,
3834 bool *send_acpi_ev,
3835 bool *ignore_acpi_ev)
3836 {
3837 /* 0x4000-0x4FFF: dock-related events */
3838 *send_acpi_ev = true;
3839 *ignore_acpi_ev = false;
3840
3841 switch (hkey) {
3842 case TP_HKEY_EV_UNDOCK_ACK:
3843 /* ACPI undock operation completed after wakeup */
3844 hotkey_autosleep_ack = 1;
3845 pr_info("undocked\n");
3846 hotkey_wakeup_hotunplug_complete_notify_change();
3847 return true;
3848
3849 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3850 pr_info("docked into hotplug port replicator\n");
3851 return true;
3852 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3853 pr_info("undocked from hotplug port replicator\n");
3854 return true;
3855
3856 /*
3857 * Deliberately ignore attaching and detaching the keybord cover to avoid
3858 * duplicates from intel-vbtn, which already emits SW_TABLET_MODE events
3859 * to userspace.
3860 *
3861 * Please refer to the following thread for more information and a preliminary
3862 * implementation using the GTOP ("Get Tablet OPtions") interface that could be
3863 * extended to other attachment options of the ThinkPad X1 Tablet series, such as
3864 * the Pico cartridge dock module:
3865 * https://lore.kernel.org/platform-driver-x86/38cb8265-1e30-d547-9e12-b4ae290be737@a-kobel.de/
3866 */
3867 case TP_HKEY_EV_KBD_COVER_ATTACH:
3868 case TP_HKEY_EV_KBD_COVER_DETACH:
3869 *send_acpi_ev = false;
3870 *ignore_acpi_ev = true;
3871 return true;
3872
3873 default:
3874 return false;
3875 }
3876 }
3877
hotkey_notify_usrevent(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3878 static bool hotkey_notify_usrevent(const u32 hkey,
3879 bool *send_acpi_ev,
3880 bool *ignore_acpi_ev)
3881 {
3882 /* 0x5000-0x5FFF: human interface helpers */
3883 *send_acpi_ev = true;
3884 *ignore_acpi_ev = false;
3885
3886 switch (hkey) {
3887 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3888 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3889 return true;
3890
3891 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3892 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3893 tpacpi_input_send_tabletsw();
3894 hotkey_tablet_mode_notify_change();
3895 *send_acpi_ev = false;
3896 return true;
3897
3898 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3899 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3900 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3901 /* do not propagate these events */
3902 *ignore_acpi_ev = true;
3903 return true;
3904
3905 default:
3906 return false;
3907 }
3908 }
3909
3910 static void thermal_dump_all_sensors(void);
3911 static void palmsensor_refresh(void);
3912
hotkey_notify_6xxx(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3913 static bool hotkey_notify_6xxx(const u32 hkey,
3914 bool *send_acpi_ev,
3915 bool *ignore_acpi_ev)
3916 {
3917 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3918 *send_acpi_ev = true;
3919 *ignore_acpi_ev = false;
3920
3921 switch (hkey) {
3922 case TP_HKEY_EV_THM_TABLE_CHANGED:
3923 pr_debug("EC reports: Thermal Table has changed\n");
3924 /* recommended action: do nothing, we don't have
3925 * Lenovo ATM information */
3926 return true;
3927 case TP_HKEY_EV_THM_CSM_COMPLETED:
3928 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n");
3929 /* Thermal event - pass on to event handler */
3930 tpacpi_driver_event(hkey);
3931 return true;
3932 case TP_HKEY_EV_THM_TRANSFM_CHANGED:
3933 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n");
3934 /* recommended action: do nothing, we don't have
3935 * Lenovo ATM information */
3936 return true;
3937 case TP_HKEY_EV_ALARM_BAT_HOT:
3938 pr_crit("THERMAL ALARM: battery is too hot!\n");
3939 /* recommended action: warn user through gui */
3940 break;
3941 case TP_HKEY_EV_ALARM_BAT_XHOT:
3942 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3943 /* recommended action: immediate sleep/hibernate */
3944 break;
3945 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3946 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
3947 /* recommended action: warn user through gui, that */
3948 /* some internal component is too hot */
3949 break;
3950 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3951 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
3952 /* recommended action: immediate sleep/hibernate */
3953 break;
3954 case TP_HKEY_EV_AC_CHANGED:
3955 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3956 * AC status changed; can be triggered by plugging or
3957 * unplugging AC adapter, docking or undocking. */
3958
3959 fallthrough;
3960
3961 case TP_HKEY_EV_KEY_NUMLOCK:
3962 case TP_HKEY_EV_KEY_FN:
3963 /* key press events, we just ignore them as long as the EC
3964 * is still reporting them in the normal keyboard stream */
3965 *send_acpi_ev = false;
3966 *ignore_acpi_ev = true;
3967 return true;
3968
3969 case TP_HKEY_EV_KEY_FN_ESC:
3970 /* Get the media key status to force the status LED to update */
3971 acpi_evalf(hkey_handle, NULL, "GMKS", "v");
3972 *send_acpi_ev = false;
3973 *ignore_acpi_ev = true;
3974 return true;
3975
3976 case TP_HKEY_EV_TABLET_CHANGED:
3977 tpacpi_input_send_tabletsw();
3978 hotkey_tablet_mode_notify_change();
3979 *send_acpi_ev = false;
3980 return true;
3981
3982 case TP_HKEY_EV_PALM_DETECTED:
3983 case TP_HKEY_EV_PALM_UNDETECTED:
3984 /* palm detected - pass on to event handler */
3985 palmsensor_refresh();
3986 return true;
3987
3988 default:
3989 /* report simply as unknown, no sensor dump */
3990 return false;
3991 }
3992
3993 thermal_dump_all_sensors();
3994 return true;
3995 }
3996
hotkey_notify(struct ibm_struct * ibm,u32 event)3997 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3998 {
3999 u32 hkey;
4000 bool send_acpi_ev;
4001 bool ignore_acpi_ev;
4002 bool known_ev;
4003
4004 if (event != 0x80) {
4005 pr_err("unknown HKEY notification event %d\n", event);
4006 /* forward it to userspace, maybe it knows how to handle it */
4007 acpi_bus_generate_netlink_event(
4008 ibm->acpi->device->pnp.device_class,
4009 dev_name(&ibm->acpi->device->dev),
4010 event, 0);
4011 return;
4012 }
4013
4014 while (1) {
4015 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
4016 pr_err("failed to retrieve HKEY event\n");
4017 return;
4018 }
4019
4020 if (hkey == 0) {
4021 /* queue empty */
4022 return;
4023 }
4024
4025 send_acpi_ev = true;
4026 ignore_acpi_ev = false;
4027
4028 switch (hkey >> 12) {
4029 case 1:
4030 /* 0x1000-0x1FFF: key presses */
4031 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
4032 &ignore_acpi_ev);
4033 break;
4034 case 2:
4035 /* 0x2000-0x2FFF: Wakeup reason */
4036 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
4037 &ignore_acpi_ev);
4038 break;
4039 case 3:
4040 /* 0x3000-0x3FFF: bay-related wakeups */
4041 switch (hkey) {
4042 case TP_HKEY_EV_BAYEJ_ACK:
4043 hotkey_autosleep_ack = 1;
4044 pr_info("bay ejected\n");
4045 hotkey_wakeup_hotunplug_complete_notify_change();
4046 known_ev = true;
4047 break;
4048 case TP_HKEY_EV_OPTDRV_EJ:
4049 /* FIXME: kick libata if SATA link offline */
4050 known_ev = true;
4051 break;
4052 default:
4053 known_ev = false;
4054 }
4055 break;
4056 case 4:
4057 /* 0x4000-0x4FFF: dock-related events */
4058 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
4059 &ignore_acpi_ev);
4060 break;
4061 case 5:
4062 /* 0x5000-0x5FFF: human interface helpers */
4063 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
4064 &ignore_acpi_ev);
4065 break;
4066 case 6:
4067 /* 0x6000-0x6FFF: thermal alarms/notices and
4068 * keyboard events */
4069 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
4070 &ignore_acpi_ev);
4071 break;
4072 case 7:
4073 /* 0x7000-0x7FFF: misc */
4074 if (tp_features.hotkey_wlsw &&
4075 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
4076 tpacpi_send_radiosw_update();
4077 send_acpi_ev = 0;
4078 known_ev = true;
4079 break;
4080 }
4081 fallthrough; /* to default */
4082 default:
4083 known_ev = false;
4084 }
4085 if (!known_ev) {
4086 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
4087 pr_notice("please report the conditions when this event happened to %s\n",
4088 TPACPI_MAIL);
4089 }
4090
4091 /* netlink events */
4092 if (!ignore_acpi_ev && send_acpi_ev) {
4093 acpi_bus_generate_netlink_event(
4094 ibm->acpi->device->pnp.device_class,
4095 dev_name(&ibm->acpi->device->dev),
4096 event, hkey);
4097 }
4098 }
4099 }
4100
hotkey_suspend(void)4101 static void hotkey_suspend(void)
4102 {
4103 /* Do these on suspend, we get the events on early resume! */
4104 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
4105 hotkey_autosleep_ack = 0;
4106
4107 /* save previous mode of adaptive keyboard of X1 Carbon */
4108 if (tp_features.has_adaptive_kbd) {
4109 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
4110 "GTRW", "dd", 0)) {
4111 pr_err("Cannot read adaptive keyboard mode.\n");
4112 }
4113 }
4114 }
4115
hotkey_resume(void)4116 static void hotkey_resume(void)
4117 {
4118 tpacpi_disable_brightness_delay();
4119
4120 mutex_lock(&hotkey_mutex);
4121 if (hotkey_status_set(true) < 0 ||
4122 hotkey_mask_set(hotkey_acpi_mask) < 0)
4123 pr_err("error while attempting to reset the event firmware interface\n");
4124 mutex_unlock(&hotkey_mutex);
4125
4126 tpacpi_send_radiosw_update();
4127 tpacpi_input_send_tabletsw();
4128 hotkey_tablet_mode_notify_change();
4129 hotkey_wakeup_reason_notify_change();
4130 hotkey_wakeup_hotunplug_complete_notify_change();
4131 hotkey_poll_setup_safe(false);
4132
4133 /* restore previous mode of adapive keyboard of X1 Carbon */
4134 if (tp_features.has_adaptive_kbd) {
4135 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4136 adaptive_keyboard_prev_mode)) {
4137 pr_err("Cannot set adaptive keyboard mode.\n");
4138 }
4139 }
4140 }
4141
4142 /* procfs -------------------------------------------------------------- */
hotkey_read(struct seq_file * m)4143 static int hotkey_read(struct seq_file *m)
4144 {
4145 int res, status;
4146
4147 if (!tp_features.hotkey) {
4148 seq_printf(m, "status:\t\tnot supported\n");
4149 return 0;
4150 }
4151
4152 if (mutex_lock_killable(&hotkey_mutex))
4153 return -ERESTARTSYS;
4154 res = hotkey_status_get(&status);
4155 if (!res)
4156 res = hotkey_mask_get();
4157 mutex_unlock(&hotkey_mutex);
4158 if (res)
4159 return res;
4160
4161 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status & BIT(0)));
4162 if (hotkey_all_mask) {
4163 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4164 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4165 } else {
4166 seq_printf(m, "mask:\t\tnot supported\n");
4167 seq_printf(m, "commands:\tenable, disable, reset\n");
4168 }
4169
4170 return 0;
4171 }
4172
hotkey_enabledisable_warn(bool enable)4173 static void hotkey_enabledisable_warn(bool enable)
4174 {
4175 tpacpi_log_usertask("procfs hotkey enable/disable");
4176 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4177 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n")))
4178 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n");
4179 }
4180
hotkey_write(char * buf)4181 static int hotkey_write(char *buf)
4182 {
4183 int res;
4184 u32 mask;
4185 char *cmd;
4186
4187 if (!tp_features.hotkey)
4188 return -ENODEV;
4189
4190 if (mutex_lock_killable(&hotkey_mutex))
4191 return -ERESTARTSYS;
4192
4193 mask = hotkey_user_mask;
4194
4195 res = 0;
4196 while ((cmd = strsep(&buf, ","))) {
4197 if (strstarts(cmd, "enable")) {
4198 hotkey_enabledisable_warn(1);
4199 } else if (strstarts(cmd, "disable")) {
4200 hotkey_enabledisable_warn(0);
4201 res = -EPERM;
4202 } else if (strstarts(cmd, "reset")) {
4203 mask = (hotkey_all_mask | hotkey_source_mask)
4204 & ~hotkey_reserved_mask;
4205 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
4206 /* mask set */
4207 } else if (sscanf(cmd, "%x", &mask) == 1) {
4208 /* mask set */
4209 } else {
4210 res = -EINVAL;
4211 goto errexit;
4212 }
4213 }
4214
4215 if (!res) {
4216 tpacpi_disclose_usertask("procfs hotkey",
4217 "set mask to 0x%08x\n", mask);
4218 res = hotkey_user_mask_set(mask);
4219 }
4220
4221 errexit:
4222 mutex_unlock(&hotkey_mutex);
4223 return res;
4224 }
4225
4226 static const struct acpi_device_id ibm_htk_device_ids[] = {
4227 {TPACPI_ACPI_IBM_HKEY_HID, 0},
4228 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4229 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
4230 {"", 0},
4231 };
4232
4233 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4234 .hid = ibm_htk_device_ids,
4235 .notify = hotkey_notify,
4236 .handle = &hkey_handle,
4237 .type = ACPI_DEVICE_NOTIFY,
4238 };
4239
4240 static struct ibm_struct hotkey_driver_data = {
4241 .name = "hotkey",
4242 .read = hotkey_read,
4243 .write = hotkey_write,
4244 .exit = hotkey_exit,
4245 .resume = hotkey_resume,
4246 .suspend = hotkey_suspend,
4247 .acpi = &ibm_hotkey_acpidriver,
4248 };
4249
4250 /*************************************************************************
4251 * Bluetooth subdriver
4252 */
4253
4254 enum {
4255 /* ACPI GBDC/SBDC bits */
4256 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
4257 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
4258 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
4259 0 = disable, 1 = enable */
4260 };
4261
4262 enum {
4263 /* ACPI \BLTH commands */
4264 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
4265 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
4266 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
4267 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
4268 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
4269 };
4270
4271 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
4272
bluetooth_get_status(void)4273 static int bluetooth_get_status(void)
4274 {
4275 int status;
4276
4277 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4278 if (dbg_bluetoothemul)
4279 return (tpacpi_bluetooth_emulstate) ?
4280 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4281 #endif
4282
4283 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4284 return -EIO;
4285
4286 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4287 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4288 }
4289
bluetooth_set_status(enum tpacpi_rfkill_state state)4290 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4291 {
4292 int status;
4293
4294 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s bluetooth\n",
4295 str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4296
4297 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4298 if (dbg_bluetoothemul) {
4299 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4300 return 0;
4301 }
4302 #endif
4303
4304 if (state == TPACPI_RFK_RADIO_ON)
4305 status = TP_ACPI_BLUETOOTH_RADIOSSW
4306 | TP_ACPI_BLUETOOTH_RESUMECTRL;
4307 else
4308 status = 0;
4309
4310 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4311 return -EIO;
4312
4313 return 0;
4314 }
4315
4316 /* sysfs bluetooth enable ---------------------------------------------- */
bluetooth_enable_show(struct device * dev,struct device_attribute * attr,char * buf)4317 static ssize_t bluetooth_enable_show(struct device *dev,
4318 struct device_attribute *attr,
4319 char *buf)
4320 {
4321 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4322 attr, buf);
4323 }
4324
bluetooth_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)4325 static ssize_t bluetooth_enable_store(struct device *dev,
4326 struct device_attribute *attr,
4327 const char *buf, size_t count)
4328 {
4329 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4330 attr, buf, count);
4331 }
4332
4333 static DEVICE_ATTR_RW(bluetooth_enable);
4334
4335 /* --------------------------------------------------------------------- */
4336
4337 static struct attribute *bluetooth_attributes[] = {
4338 &dev_attr_bluetooth_enable.attr,
4339 NULL
4340 };
4341
bluetooth_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)4342 static umode_t bluetooth_attr_is_visible(struct kobject *kobj,
4343 struct attribute *attr, int n)
4344 {
4345 return tp_features.bluetooth ? attr->mode : 0;
4346 }
4347
4348 static const struct attribute_group bluetooth_attr_group = {
4349 .is_visible = bluetooth_attr_is_visible,
4350 .attrs = bluetooth_attributes,
4351 };
4352
4353 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4354 .get_status = bluetooth_get_status,
4355 .set_status = bluetooth_set_status,
4356 };
4357
bluetooth_shutdown(void)4358 static void bluetooth_shutdown(void)
4359 {
4360 /* Order firmware to save current state to NVRAM */
4361 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4362 TP_ACPI_BLTH_SAVE_STATE))
4363 pr_notice("failed to save bluetooth state to NVRAM\n");
4364 else
4365 vdbg_printk(TPACPI_DBG_RFKILL,
4366 "bluetooth state saved to NVRAM\n");
4367 }
4368
bluetooth_exit(void)4369 static void bluetooth_exit(void)
4370 {
4371 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4372 bluetooth_shutdown();
4373 }
4374
4375 static const struct dmi_system_id fwbug_list[] __initconst = {
4376 {
4377 .ident = "ThinkPad E485",
4378 .driver_data = &quirk_btusb_bug,
4379 .matches = {
4380 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4381 DMI_MATCH(DMI_BOARD_NAME, "20KU"),
4382 },
4383 },
4384 {
4385 .ident = "ThinkPad E585",
4386 .driver_data = &quirk_btusb_bug,
4387 .matches = {
4388 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4389 DMI_MATCH(DMI_BOARD_NAME, "20KV"),
4390 },
4391 },
4392 {
4393 .ident = "ThinkPad A285 - 20MW",
4394 .driver_data = &quirk_btusb_bug,
4395 .matches = {
4396 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4397 DMI_MATCH(DMI_BOARD_NAME, "20MW"),
4398 },
4399 },
4400 {
4401 .ident = "ThinkPad A285 - 20MX",
4402 .driver_data = &quirk_btusb_bug,
4403 .matches = {
4404 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4405 DMI_MATCH(DMI_BOARD_NAME, "20MX"),
4406 },
4407 },
4408 {
4409 .ident = "ThinkPad A485 - 20MU",
4410 .driver_data = &quirk_btusb_bug,
4411 .matches = {
4412 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4413 DMI_MATCH(DMI_BOARD_NAME, "20MU"),
4414 },
4415 },
4416 {
4417 .ident = "ThinkPad A485 - 20MV",
4418 .driver_data = &quirk_btusb_bug,
4419 .matches = {
4420 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4421 DMI_MATCH(DMI_BOARD_NAME, "20MV"),
4422 },
4423 },
4424 {}
4425 };
4426
4427 static const struct pci_device_id fwbug_cards_ids[] __initconst = {
4428 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) },
4429 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) },
4430 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) },
4431 {}
4432 };
4433
4434
have_bt_fwbug(void)4435 static int __init have_bt_fwbug(void)
4436 {
4437 /*
4438 * Some AMD based ThinkPads have a firmware bug that calling
4439 * "GBDC" will cause bluetooth on Intel wireless cards blocked
4440 */
4441 if (tp_features.quirks && tp_features.quirks->btusb_bug &&
4442 pci_dev_present(fwbug_cards_ids)) {
4443 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4444 FW_BUG "disable bluetooth subdriver for Intel cards\n");
4445 return 1;
4446 } else
4447 return 0;
4448 }
4449
bluetooth_init(struct ibm_init_struct * iibm)4450 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4451 {
4452 int res;
4453 int status = 0;
4454
4455 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4456 "initializing bluetooth subdriver\n");
4457
4458 TPACPI_ACPIHANDLE_INIT(hkey);
4459
4460 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4461 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4462 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle &&
4463 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4464
4465 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4466 "bluetooth is %s, status 0x%02x\n",
4467 str_supported(tp_features.bluetooth),
4468 status);
4469
4470 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4471 if (dbg_bluetoothemul) {
4472 tp_features.bluetooth = 1;
4473 pr_info("bluetooth switch emulation enabled\n");
4474 } else
4475 #endif
4476 if (tp_features.bluetooth &&
4477 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4478 /* no bluetooth hardware present in system */
4479 tp_features.bluetooth = 0;
4480 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4481 "bluetooth hardware not installed\n");
4482 }
4483
4484 if (!tp_features.bluetooth)
4485 return -ENODEV;
4486
4487 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4488 &bluetooth_tprfk_ops,
4489 RFKILL_TYPE_BLUETOOTH,
4490 TPACPI_RFK_BLUETOOTH_SW_NAME,
4491 true);
4492 return res;
4493 }
4494
4495 /* procfs -------------------------------------------------------------- */
bluetooth_read(struct seq_file * m)4496 static int bluetooth_read(struct seq_file *m)
4497 {
4498 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4499 }
4500
bluetooth_write(char * buf)4501 static int bluetooth_write(char *buf)
4502 {
4503 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4504 }
4505
4506 static struct ibm_struct bluetooth_driver_data = {
4507 .name = "bluetooth",
4508 .read = bluetooth_read,
4509 .write = bluetooth_write,
4510 .exit = bluetooth_exit,
4511 .shutdown = bluetooth_shutdown,
4512 };
4513
4514 /*************************************************************************
4515 * Wan subdriver
4516 */
4517
4518 enum {
4519 /* ACPI GWAN/SWAN bits */
4520 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4521 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4522 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4523 0 = disable, 1 = enable */
4524 };
4525
4526 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4527
wan_get_status(void)4528 static int wan_get_status(void)
4529 {
4530 int status;
4531
4532 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4533 if (dbg_wwanemul)
4534 return (tpacpi_wwan_emulstate) ?
4535 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4536 #endif
4537
4538 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4539 return -EIO;
4540
4541 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4542 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4543 }
4544
wan_set_status(enum tpacpi_rfkill_state state)4545 static int wan_set_status(enum tpacpi_rfkill_state state)
4546 {
4547 int status;
4548
4549 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s wwan\n",
4550 str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4551
4552 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4553 if (dbg_wwanemul) {
4554 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4555 return 0;
4556 }
4557 #endif
4558
4559 if (state == TPACPI_RFK_RADIO_ON)
4560 status = TP_ACPI_WANCARD_RADIOSSW
4561 | TP_ACPI_WANCARD_RESUMECTRL;
4562 else
4563 status = 0;
4564
4565 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4566 return -EIO;
4567
4568 return 0;
4569 }
4570
4571 /* sysfs wan enable ---------------------------------------------------- */
wan_enable_show(struct device * dev,struct device_attribute * attr,char * buf)4572 static ssize_t wan_enable_show(struct device *dev,
4573 struct device_attribute *attr,
4574 char *buf)
4575 {
4576 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4577 attr, buf);
4578 }
4579
wan_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)4580 static ssize_t wan_enable_store(struct device *dev,
4581 struct device_attribute *attr,
4582 const char *buf, size_t count)
4583 {
4584 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4585 attr, buf, count);
4586 }
4587
4588 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4589 wan_enable_show, wan_enable_store);
4590
4591 /* --------------------------------------------------------------------- */
4592
4593 static struct attribute *wan_attributes[] = {
4594 &dev_attr_wwan_enable.attr,
4595 NULL
4596 };
4597
wan_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)4598 static umode_t wan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
4599 int n)
4600 {
4601 return tp_features.wan ? attr->mode : 0;
4602 }
4603
4604 static const struct attribute_group wan_attr_group = {
4605 .is_visible = wan_attr_is_visible,
4606 .attrs = wan_attributes,
4607 };
4608
4609 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4610 .get_status = wan_get_status,
4611 .set_status = wan_set_status,
4612 };
4613
wan_shutdown(void)4614 static void wan_shutdown(void)
4615 {
4616 /* Order firmware to save current state to NVRAM */
4617 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4618 TP_ACPI_WGSV_SAVE_STATE))
4619 pr_notice("failed to save WWAN state to NVRAM\n");
4620 else
4621 vdbg_printk(TPACPI_DBG_RFKILL,
4622 "WWAN state saved to NVRAM\n");
4623 }
4624
wan_exit(void)4625 static void wan_exit(void)
4626 {
4627 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4628 wan_shutdown();
4629 }
4630
wan_init(struct ibm_init_struct * iibm)4631 static int __init wan_init(struct ibm_init_struct *iibm)
4632 {
4633 int res;
4634 int status = 0;
4635
4636 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4637 "initializing wan subdriver\n");
4638
4639 TPACPI_ACPIHANDLE_INIT(hkey);
4640
4641 tp_features.wan = hkey_handle &&
4642 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4643
4644 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4645 "wan is %s, status 0x%02x\n",
4646 str_supported(tp_features.wan),
4647 status);
4648
4649 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4650 if (dbg_wwanemul) {
4651 tp_features.wan = 1;
4652 pr_info("wwan switch emulation enabled\n");
4653 } else
4654 #endif
4655 if (tp_features.wan &&
4656 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4657 /* no wan hardware present in system */
4658 tp_features.wan = 0;
4659 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4660 "wan hardware not installed\n");
4661 }
4662
4663 if (!tp_features.wan)
4664 return -ENODEV;
4665
4666 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4667 &wan_tprfk_ops,
4668 RFKILL_TYPE_WWAN,
4669 TPACPI_RFK_WWAN_SW_NAME,
4670 true);
4671 return res;
4672 }
4673
4674 /* procfs -------------------------------------------------------------- */
wan_read(struct seq_file * m)4675 static int wan_read(struct seq_file *m)
4676 {
4677 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4678 }
4679
wan_write(char * buf)4680 static int wan_write(char *buf)
4681 {
4682 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4683 }
4684
4685 static struct ibm_struct wan_driver_data = {
4686 .name = "wan",
4687 .read = wan_read,
4688 .write = wan_write,
4689 .exit = wan_exit,
4690 .shutdown = wan_shutdown,
4691 };
4692
4693 /*************************************************************************
4694 * UWB subdriver
4695 */
4696
4697 enum {
4698 /* ACPI GUWB/SUWB bits */
4699 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4700 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4701 };
4702
4703 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4704
uwb_get_status(void)4705 static int uwb_get_status(void)
4706 {
4707 int status;
4708
4709 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4710 if (dbg_uwbemul)
4711 return (tpacpi_uwb_emulstate) ?
4712 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4713 #endif
4714
4715 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4716 return -EIO;
4717
4718 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4719 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4720 }
4721
uwb_set_status(enum tpacpi_rfkill_state state)4722 static int uwb_set_status(enum tpacpi_rfkill_state state)
4723 {
4724 int status;
4725
4726 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s UWB\n",
4727 str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4728
4729 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4730 if (dbg_uwbemul) {
4731 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4732 return 0;
4733 }
4734 #endif
4735
4736 if (state == TPACPI_RFK_RADIO_ON)
4737 status = TP_ACPI_UWB_RADIOSSW;
4738 else
4739 status = 0;
4740
4741 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4742 return -EIO;
4743
4744 return 0;
4745 }
4746
4747 /* --------------------------------------------------------------------- */
4748
4749 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4750 .get_status = uwb_get_status,
4751 .set_status = uwb_set_status,
4752 };
4753
uwb_exit(void)4754 static void uwb_exit(void)
4755 {
4756 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4757 }
4758
uwb_init(struct ibm_init_struct * iibm)4759 static int __init uwb_init(struct ibm_init_struct *iibm)
4760 {
4761 int res;
4762 int status = 0;
4763
4764 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4765 "initializing uwb subdriver\n");
4766
4767 TPACPI_ACPIHANDLE_INIT(hkey);
4768
4769 tp_features.uwb = hkey_handle &&
4770 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4771
4772 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4773 "uwb is %s, status 0x%02x\n",
4774 str_supported(tp_features.uwb),
4775 status);
4776
4777 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4778 if (dbg_uwbemul) {
4779 tp_features.uwb = 1;
4780 pr_info("uwb switch emulation enabled\n");
4781 } else
4782 #endif
4783 if (tp_features.uwb &&
4784 !(status & TP_ACPI_UWB_HWPRESENT)) {
4785 /* no uwb hardware present in system */
4786 tp_features.uwb = 0;
4787 dbg_printk(TPACPI_DBG_INIT,
4788 "uwb hardware not installed\n");
4789 }
4790
4791 if (!tp_features.uwb)
4792 return -ENODEV;
4793
4794 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4795 &uwb_tprfk_ops,
4796 RFKILL_TYPE_UWB,
4797 TPACPI_RFK_UWB_SW_NAME,
4798 false);
4799 return res;
4800 }
4801
4802 static struct ibm_struct uwb_driver_data = {
4803 .name = "uwb",
4804 .exit = uwb_exit,
4805 .flags.experimental = 1,
4806 };
4807
4808 /*************************************************************************
4809 * Video subdriver
4810 */
4811
4812 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4813
4814 enum video_access_mode {
4815 TPACPI_VIDEO_NONE = 0,
4816 TPACPI_VIDEO_570, /* 570 */
4817 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4818 TPACPI_VIDEO_NEW, /* all others */
4819 };
4820
4821 enum { /* video status flags, based on VIDEO_570 */
4822 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4823 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4824 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4825 };
4826
4827 enum { /* TPACPI_VIDEO_570 constants */
4828 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4829 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4830 * video_status_flags */
4831 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4832 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4833 };
4834
4835 static enum video_access_mode video_supported;
4836 static int video_orig_autosw;
4837
4838 static int video_autosw_get(void);
4839 static int video_autosw_set(int enable);
4840
4841 TPACPI_HANDLE(vid, root,
4842 "\\_SB.PCI.AGP.VGA", /* 570 */
4843 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4844 "\\_SB.PCI0.VID0", /* 770e */
4845 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4846 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4847 "\\_SB.PCI0.AGP.VID", /* all others */
4848 ); /* R30, R31 */
4849
4850 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4851
video_init(struct ibm_init_struct * iibm)4852 static int __init video_init(struct ibm_init_struct *iibm)
4853 {
4854 int ivga;
4855
4856 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4857
4858 TPACPI_ACPIHANDLE_INIT(vid);
4859 if (tpacpi_is_ibm())
4860 TPACPI_ACPIHANDLE_INIT(vid2);
4861
4862 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4863 /* G41, assume IVGA doesn't change */
4864 vid_handle = vid2_handle;
4865
4866 if (!vid_handle)
4867 /* video switching not supported on R30, R31 */
4868 video_supported = TPACPI_VIDEO_NONE;
4869 else if (tpacpi_is_ibm() &&
4870 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4871 /* 570 */
4872 video_supported = TPACPI_VIDEO_570;
4873 else if (tpacpi_is_ibm() &&
4874 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4875 /* 600e/x, 770e, 770x */
4876 video_supported = TPACPI_VIDEO_770;
4877 else
4878 /* all others */
4879 video_supported = TPACPI_VIDEO_NEW;
4880
4881 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4882 str_supported(video_supported != TPACPI_VIDEO_NONE),
4883 video_supported);
4884
4885 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : -ENODEV;
4886 }
4887
video_exit(void)4888 static void video_exit(void)
4889 {
4890 dbg_printk(TPACPI_DBG_EXIT,
4891 "restoring original video autoswitch mode\n");
4892 if (video_autosw_set(video_orig_autosw))
4893 pr_err("error while trying to restore original video autoswitch mode\n");
4894 }
4895
video_outputsw_get(void)4896 static int video_outputsw_get(void)
4897 {
4898 int status = 0;
4899 int i;
4900
4901 switch (video_supported) {
4902 case TPACPI_VIDEO_570:
4903 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4904 TP_ACPI_VIDEO_570_PHSCMD))
4905 return -EIO;
4906 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4907 break;
4908 case TPACPI_VIDEO_770:
4909 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4910 return -EIO;
4911 if (i)
4912 status |= TP_ACPI_VIDEO_S_LCD;
4913 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4914 return -EIO;
4915 if (i)
4916 status |= TP_ACPI_VIDEO_S_CRT;
4917 break;
4918 case TPACPI_VIDEO_NEW:
4919 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4920 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4921 return -EIO;
4922 if (i)
4923 status |= TP_ACPI_VIDEO_S_CRT;
4924
4925 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4926 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4927 return -EIO;
4928 if (i)
4929 status |= TP_ACPI_VIDEO_S_LCD;
4930 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4931 return -EIO;
4932 if (i)
4933 status |= TP_ACPI_VIDEO_S_DVI;
4934 break;
4935 default:
4936 return -ENOSYS;
4937 }
4938
4939 return status;
4940 }
4941
video_outputsw_set(int status)4942 static int video_outputsw_set(int status)
4943 {
4944 int autosw;
4945 int res = 0;
4946
4947 switch (video_supported) {
4948 case TPACPI_VIDEO_570:
4949 res = acpi_evalf(NULL, NULL,
4950 "\\_SB.PHS2", "vdd",
4951 TP_ACPI_VIDEO_570_PHS2CMD,
4952 status | TP_ACPI_VIDEO_570_PHS2SET);
4953 break;
4954 case TPACPI_VIDEO_770:
4955 autosw = video_autosw_get();
4956 if (autosw < 0)
4957 return autosw;
4958
4959 res = video_autosw_set(1);
4960 if (res)
4961 return res;
4962 res = acpi_evalf(vid_handle, NULL,
4963 "ASWT", "vdd", status * 0x100, 0);
4964 if (!autosw && video_autosw_set(autosw)) {
4965 pr_err("video auto-switch left enabled due to error\n");
4966 return -EIO;
4967 }
4968 break;
4969 case TPACPI_VIDEO_NEW:
4970 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4971 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4972 break;
4973 default:
4974 return -ENOSYS;
4975 }
4976
4977 return (res) ? 0 : -EIO;
4978 }
4979
video_autosw_get(void)4980 static int video_autosw_get(void)
4981 {
4982 int autosw = 0;
4983
4984 switch (video_supported) {
4985 case TPACPI_VIDEO_570:
4986 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4987 return -EIO;
4988 break;
4989 case TPACPI_VIDEO_770:
4990 case TPACPI_VIDEO_NEW:
4991 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4992 return -EIO;
4993 break;
4994 default:
4995 return -ENOSYS;
4996 }
4997
4998 return autosw & 1;
4999 }
5000
video_autosw_set(int enable)5001 static int video_autosw_set(int enable)
5002 {
5003 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
5004 return -EIO;
5005 return 0;
5006 }
5007
video_outputsw_cycle(void)5008 static int video_outputsw_cycle(void)
5009 {
5010 int autosw = video_autosw_get();
5011 int res;
5012
5013 if (autosw < 0)
5014 return autosw;
5015
5016 switch (video_supported) {
5017 case TPACPI_VIDEO_570:
5018 res = video_autosw_set(1);
5019 if (res)
5020 return res;
5021 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
5022 break;
5023 case TPACPI_VIDEO_770:
5024 case TPACPI_VIDEO_NEW:
5025 res = video_autosw_set(1);
5026 if (res)
5027 return res;
5028 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
5029 break;
5030 default:
5031 return -ENOSYS;
5032 }
5033 if (!autosw && video_autosw_set(autosw)) {
5034 pr_err("video auto-switch left enabled due to error\n");
5035 return -EIO;
5036 }
5037
5038 return (res) ? 0 : -EIO;
5039 }
5040
video_expand_toggle(void)5041 static int video_expand_toggle(void)
5042 {
5043 switch (video_supported) {
5044 case TPACPI_VIDEO_570:
5045 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
5046 0 : -EIO;
5047 case TPACPI_VIDEO_770:
5048 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
5049 0 : -EIO;
5050 case TPACPI_VIDEO_NEW:
5051 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
5052 0 : -EIO;
5053 default:
5054 return -ENOSYS;
5055 }
5056 /* not reached */
5057 }
5058
video_read(struct seq_file * m)5059 static int video_read(struct seq_file *m)
5060 {
5061 int status, autosw;
5062
5063 if (video_supported == TPACPI_VIDEO_NONE) {
5064 seq_printf(m, "status:\t\tnot supported\n");
5065 return 0;
5066 }
5067
5068 /* Even reads can crash X.org, so... */
5069 if (!capable(CAP_SYS_ADMIN))
5070 return -EPERM;
5071
5072 status = video_outputsw_get();
5073 if (status < 0)
5074 return status;
5075
5076 autosw = video_autosw_get();
5077 if (autosw < 0)
5078 return autosw;
5079
5080 seq_printf(m, "status:\t\tsupported\n");
5081 seq_printf(m, "lcd:\t\t%s\n", str_enabled_disabled(status & BIT(0)));
5082 seq_printf(m, "crt:\t\t%s\n", str_enabled_disabled(status & BIT(1)));
5083 if (video_supported == TPACPI_VIDEO_NEW)
5084 seq_printf(m, "dvi:\t\t%s\n", str_enabled_disabled(status & BIT(3)));
5085 seq_printf(m, "auto:\t\t%s\n", str_enabled_disabled(autosw & BIT(0)));
5086 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
5087 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
5088 if (video_supported == TPACPI_VIDEO_NEW)
5089 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
5090 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
5091 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
5092
5093 return 0;
5094 }
5095
video_write(char * buf)5096 static int video_write(char *buf)
5097 {
5098 char *cmd;
5099 int enable, disable, status;
5100 int res;
5101
5102 if (video_supported == TPACPI_VIDEO_NONE)
5103 return -ENODEV;
5104
5105 /* Even reads can crash X.org, let alone writes... */
5106 if (!capable(CAP_SYS_ADMIN))
5107 return -EPERM;
5108
5109 enable = 0;
5110 disable = 0;
5111
5112 while ((cmd = strsep(&buf, ","))) {
5113 if (strstarts(cmd, "lcd_enable")) {
5114 enable |= TP_ACPI_VIDEO_S_LCD;
5115 } else if (strstarts(cmd, "lcd_disable")) {
5116 disable |= TP_ACPI_VIDEO_S_LCD;
5117 } else if (strstarts(cmd, "crt_enable")) {
5118 enable |= TP_ACPI_VIDEO_S_CRT;
5119 } else if (strstarts(cmd, "crt_disable")) {
5120 disable |= TP_ACPI_VIDEO_S_CRT;
5121 } else if (video_supported == TPACPI_VIDEO_NEW &&
5122 strstarts(cmd, "dvi_enable")) {
5123 enable |= TP_ACPI_VIDEO_S_DVI;
5124 } else if (video_supported == TPACPI_VIDEO_NEW &&
5125 strstarts(cmd, "dvi_disable")) {
5126 disable |= TP_ACPI_VIDEO_S_DVI;
5127 } else if (strstarts(cmd, "auto_enable")) {
5128 res = video_autosw_set(1);
5129 if (res)
5130 return res;
5131 } else if (strstarts(cmd, "auto_disable")) {
5132 res = video_autosw_set(0);
5133 if (res)
5134 return res;
5135 } else if (strstarts(cmd, "video_switch")) {
5136 res = video_outputsw_cycle();
5137 if (res)
5138 return res;
5139 } else if (strstarts(cmd, "expand_toggle")) {
5140 res = video_expand_toggle();
5141 if (res)
5142 return res;
5143 } else
5144 return -EINVAL;
5145 }
5146
5147 if (enable || disable) {
5148 status = video_outputsw_get();
5149 if (status < 0)
5150 return status;
5151 res = video_outputsw_set((status & ~disable) | enable);
5152 if (res)
5153 return res;
5154 }
5155
5156 return 0;
5157 }
5158
5159 static struct ibm_struct video_driver_data = {
5160 .name = "video",
5161 .read = video_read,
5162 .write = video_write,
5163 .exit = video_exit,
5164 };
5165
5166 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
5167
5168 /*************************************************************************
5169 * Keyboard backlight subdriver
5170 */
5171
5172 static enum led_brightness kbdlight_brightness;
5173 static DEFINE_MUTEX(kbdlight_mutex);
5174
kbdlight_set_level(int level)5175 static int kbdlight_set_level(int level)
5176 {
5177 int ret = 0;
5178
5179 if (!hkey_handle)
5180 return -ENXIO;
5181
5182 mutex_lock(&kbdlight_mutex);
5183
5184 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
5185 ret = -EIO;
5186 else
5187 kbdlight_brightness = level;
5188
5189 mutex_unlock(&kbdlight_mutex);
5190
5191 return ret;
5192 }
5193
kbdlight_get_level(void)5194 static int kbdlight_get_level(void)
5195 {
5196 int status = 0;
5197
5198 if (!hkey_handle)
5199 return -ENXIO;
5200
5201 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
5202 return -EIO;
5203
5204 if (status < 0)
5205 return status;
5206
5207 return status & 0x3;
5208 }
5209
kbdlight_is_supported(void)5210 static bool kbdlight_is_supported(void)
5211 {
5212 int status = 0;
5213
5214 if (!hkey_handle)
5215 return false;
5216
5217 if (!acpi_has_method(hkey_handle, "MLCG")) {
5218 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
5219 return false;
5220 }
5221
5222 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
5223 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
5224 return false;
5225 }
5226
5227 if (status < 0) {
5228 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
5229 return false;
5230 }
5231
5232 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
5233 /*
5234 * Guessed test for keyboard backlight:
5235 *
5236 * Machines with backlight keyboard return:
5237 * b010100000010000000XX - ThinkPad X1 Carbon 3rd
5238 * b110100010010000000XX - ThinkPad x230
5239 * b010100000010000000XX - ThinkPad x240
5240 * b010100000010000000XX - ThinkPad W541
5241 * (XX is current backlight level)
5242 *
5243 * Machines without backlight keyboard return:
5244 * b10100001000000000000 - ThinkPad x230
5245 * b10110001000000000000 - ThinkPad E430
5246 * b00000000000000000000 - ThinkPad E450
5247 *
5248 * Candidate BITs for detection test (XOR):
5249 * b01000000001000000000
5250 * ^
5251 */
5252 return status & BIT(9);
5253 }
5254
kbdlight_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)5255 static int kbdlight_sysfs_set(struct led_classdev *led_cdev,
5256 enum led_brightness brightness)
5257 {
5258 return kbdlight_set_level(brightness);
5259 }
5260
kbdlight_sysfs_get(struct led_classdev * led_cdev)5261 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
5262 {
5263 int level;
5264
5265 level = kbdlight_get_level();
5266 if (level < 0)
5267 return 0;
5268
5269 return level;
5270 }
5271
5272 static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
5273 .led_classdev = {
5274 .name = "tpacpi::kbd_backlight",
5275 .max_brightness = 2,
5276 .flags = LED_BRIGHT_HW_CHANGED,
5277 .brightness_set_blocking = &kbdlight_sysfs_set,
5278 .brightness_get = &kbdlight_sysfs_get,
5279 }
5280 };
5281
kbdlight_init(struct ibm_init_struct * iibm)5282 static int __init kbdlight_init(struct ibm_init_struct *iibm)
5283 {
5284 int rc;
5285
5286 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
5287
5288 TPACPI_ACPIHANDLE_INIT(hkey);
5289
5290 if (!kbdlight_is_supported()) {
5291 tp_features.kbdlight = 0;
5292 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
5293 return -ENODEV;
5294 }
5295
5296 kbdlight_brightness = kbdlight_sysfs_get(NULL);
5297 tp_features.kbdlight = 1;
5298
5299 rc = led_classdev_register(&tpacpi_pdev->dev,
5300 &tpacpi_led_kbdlight.led_classdev);
5301 if (rc < 0) {
5302 tp_features.kbdlight = 0;
5303 return rc;
5304 }
5305
5306 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
5307 TP_ACPI_HKEY_KBD_LIGHT_MASK);
5308 return 0;
5309 }
5310
kbdlight_exit(void)5311 static void kbdlight_exit(void)
5312 {
5313 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
5314 }
5315
kbdlight_set_level_and_update(int level)5316 static int kbdlight_set_level_and_update(int level)
5317 {
5318 int ret;
5319 struct led_classdev *led_cdev;
5320
5321 ret = kbdlight_set_level(level);
5322 led_cdev = &tpacpi_led_kbdlight.led_classdev;
5323
5324 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED))
5325 led_cdev->brightness = level;
5326
5327 return ret;
5328 }
5329
kbdlight_read(struct seq_file * m)5330 static int kbdlight_read(struct seq_file *m)
5331 {
5332 int level;
5333
5334 if (!tp_features.kbdlight) {
5335 seq_printf(m, "status:\t\tnot supported\n");
5336 } else {
5337 level = kbdlight_get_level();
5338 if (level < 0)
5339 seq_printf(m, "status:\t\terror %d\n", level);
5340 else
5341 seq_printf(m, "status:\t\t%d\n", level);
5342 seq_printf(m, "commands:\t0, 1, 2\n");
5343 }
5344
5345 return 0;
5346 }
5347
kbdlight_write(char * buf)5348 static int kbdlight_write(char *buf)
5349 {
5350 char *cmd;
5351 int res, level = -EINVAL;
5352
5353 if (!tp_features.kbdlight)
5354 return -ENODEV;
5355
5356 while ((cmd = strsep(&buf, ","))) {
5357 res = kstrtoint(cmd, 10, &level);
5358 if (res < 0)
5359 return res;
5360 }
5361
5362 if (level >= 3 || level < 0)
5363 return -EINVAL;
5364
5365 return kbdlight_set_level_and_update(level);
5366 }
5367
kbdlight_suspend(void)5368 static void kbdlight_suspend(void)
5369 {
5370 struct led_classdev *led_cdev;
5371
5372 if (!tp_features.kbdlight)
5373 return;
5374
5375 led_cdev = &tpacpi_led_kbdlight.led_classdev;
5376 led_update_brightness(led_cdev);
5377 led_classdev_suspend(led_cdev);
5378 }
5379
kbdlight_resume(void)5380 static void kbdlight_resume(void)
5381 {
5382 if (!tp_features.kbdlight)
5383 return;
5384
5385 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev);
5386 }
5387
5388 static struct ibm_struct kbdlight_driver_data = {
5389 .name = "kbdlight",
5390 .read = kbdlight_read,
5391 .write = kbdlight_write,
5392 .suspend = kbdlight_suspend,
5393 .resume = kbdlight_resume,
5394 .exit = kbdlight_exit,
5395 };
5396
5397 /*************************************************************************
5398 * Light (thinklight) subdriver
5399 */
5400
5401 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
5402 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
5403
light_get_status(void)5404 static int light_get_status(void)
5405 {
5406 int status = 0;
5407
5408 if (tp_features.light_status) {
5409 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5410 return -EIO;
5411 return (!!status);
5412 }
5413
5414 return -ENXIO;
5415 }
5416
light_set_status(int status)5417 static int light_set_status(int status)
5418 {
5419 int rc;
5420
5421 if (tp_features.light) {
5422 if (cmos_handle) {
5423 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5424 (status) ?
5425 TP_CMOS_THINKLIGHT_ON :
5426 TP_CMOS_THINKLIGHT_OFF);
5427 } else {
5428 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5429 (status) ? 1 : 0);
5430 }
5431 return (rc) ? 0 : -EIO;
5432 }
5433
5434 return -ENXIO;
5435 }
5436
light_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)5437 static int light_sysfs_set(struct led_classdev *led_cdev,
5438 enum led_brightness brightness)
5439 {
5440 return light_set_status((brightness != LED_OFF) ?
5441 TPACPI_LED_ON : TPACPI_LED_OFF);
5442 }
5443
light_sysfs_get(struct led_classdev * led_cdev)5444 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5445 {
5446 return (light_get_status() == 1) ? LED_ON : LED_OFF;
5447 }
5448
5449 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5450 .led_classdev = {
5451 .name = "tpacpi::thinklight",
5452 .max_brightness = 1,
5453 .brightness_set_blocking = &light_sysfs_set,
5454 .brightness_get = &light_sysfs_get,
5455 }
5456 };
5457
light_init(struct ibm_init_struct * iibm)5458 static int __init light_init(struct ibm_init_struct *iibm)
5459 {
5460 int rc;
5461
5462 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5463
5464 if (tpacpi_is_ibm()) {
5465 TPACPI_ACPIHANDLE_INIT(ledb);
5466 TPACPI_ACPIHANDLE_INIT(lght);
5467 }
5468 TPACPI_ACPIHANDLE_INIT(cmos);
5469
5470 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5471 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5472
5473 if (tp_features.light)
5474 /* light status not supported on
5475 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5476 tp_features.light_status =
5477 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5478
5479 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5480 str_supported(tp_features.light),
5481 str_supported(tp_features.light_status));
5482
5483 if (!tp_features.light)
5484 return -ENODEV;
5485
5486 rc = led_classdev_register(&tpacpi_pdev->dev,
5487 &tpacpi_led_thinklight.led_classdev);
5488
5489 if (rc < 0) {
5490 tp_features.light = 0;
5491 tp_features.light_status = 0;
5492 } else {
5493 rc = 0;
5494 }
5495
5496 return rc;
5497 }
5498
light_exit(void)5499 static void light_exit(void)
5500 {
5501 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5502 }
5503
light_read(struct seq_file * m)5504 static int light_read(struct seq_file *m)
5505 {
5506 int status;
5507
5508 if (!tp_features.light) {
5509 seq_printf(m, "status:\t\tnot supported\n");
5510 } else if (!tp_features.light_status) {
5511 seq_printf(m, "status:\t\tunknown\n");
5512 seq_printf(m, "commands:\ton, off\n");
5513 } else {
5514 status = light_get_status();
5515 if (status < 0)
5516 return status;
5517 seq_printf(m, "status:\t\t%s\n", str_on_off(status & BIT(0)));
5518 seq_printf(m, "commands:\ton, off\n");
5519 }
5520
5521 return 0;
5522 }
5523
light_write(char * buf)5524 static int light_write(char *buf)
5525 {
5526 char *cmd;
5527 int newstatus = 0;
5528
5529 if (!tp_features.light)
5530 return -ENODEV;
5531
5532 while ((cmd = strsep(&buf, ","))) {
5533 if (strstarts(cmd, "on")) {
5534 newstatus = 1;
5535 } else if (strstarts(cmd, "off")) {
5536 newstatus = 0;
5537 } else
5538 return -EINVAL;
5539 }
5540
5541 return light_set_status(newstatus);
5542 }
5543
5544 static struct ibm_struct light_driver_data = {
5545 .name = "light",
5546 .read = light_read,
5547 .write = light_write,
5548 .exit = light_exit,
5549 };
5550
5551 /*************************************************************************
5552 * CMOS subdriver
5553 */
5554
5555 /* sysfs cmos_command -------------------------------------------------- */
cmos_command_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)5556 static ssize_t cmos_command_store(struct device *dev,
5557 struct device_attribute *attr,
5558 const char *buf, size_t count)
5559 {
5560 unsigned long cmos_cmd;
5561 int res;
5562
5563 if (parse_strtoul(buf, 21, &cmos_cmd))
5564 return -EINVAL;
5565
5566 res = issue_thinkpad_cmos_command(cmos_cmd);
5567 return (res) ? res : count;
5568 }
5569
5570 static DEVICE_ATTR_WO(cmos_command);
5571
5572 static struct attribute *cmos_attributes[] = {
5573 &dev_attr_cmos_command.attr,
5574 NULL
5575 };
5576
cmos_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)5577 static umode_t cmos_attr_is_visible(struct kobject *kobj,
5578 struct attribute *attr, int n)
5579 {
5580 return cmos_handle ? attr->mode : 0;
5581 }
5582
5583 static const struct attribute_group cmos_attr_group = {
5584 .is_visible = cmos_attr_is_visible,
5585 .attrs = cmos_attributes,
5586 };
5587
5588 /* --------------------------------------------------------------------- */
5589
cmos_init(struct ibm_init_struct * iibm)5590 static int __init cmos_init(struct ibm_init_struct *iibm)
5591 {
5592 vdbg_printk(TPACPI_DBG_INIT,
5593 "initializing cmos commands subdriver\n");
5594
5595 TPACPI_ACPIHANDLE_INIT(cmos);
5596
5597 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5598 str_supported(cmos_handle != NULL));
5599
5600 return cmos_handle ? 0 : -ENODEV;
5601 }
5602
cmos_read(struct seq_file * m)5603 static int cmos_read(struct seq_file *m)
5604 {
5605 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5606 R30, R31, T20-22, X20-21 */
5607 if (!cmos_handle)
5608 seq_printf(m, "status:\t\tnot supported\n");
5609 else {
5610 seq_printf(m, "status:\t\tsupported\n");
5611 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5612 }
5613
5614 return 0;
5615 }
5616
cmos_write(char * buf)5617 static int cmos_write(char *buf)
5618 {
5619 char *cmd;
5620 int cmos_cmd, res;
5621
5622 while ((cmd = strsep(&buf, ","))) {
5623 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5624 cmos_cmd >= 0 && cmos_cmd <= 21) {
5625 /* cmos_cmd set */
5626 } else
5627 return -EINVAL;
5628
5629 res = issue_thinkpad_cmos_command(cmos_cmd);
5630 if (res)
5631 return res;
5632 }
5633
5634 return 0;
5635 }
5636
5637 static struct ibm_struct cmos_driver_data = {
5638 .name = "cmos",
5639 .read = cmos_read,
5640 .write = cmos_write,
5641 };
5642
5643 /*************************************************************************
5644 * LED subdriver
5645 */
5646
5647 enum led_access_mode {
5648 TPACPI_LED_NONE = 0,
5649 TPACPI_LED_570, /* 570 */
5650 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5651 TPACPI_LED_NEW, /* all others */
5652 };
5653
5654 enum { /* For TPACPI_LED_OLD */
5655 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5656 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5657 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5658 };
5659
5660 static enum led_access_mode led_supported;
5661
5662 static acpi_handle led_handle;
5663
5664 #define TPACPI_LED_NUMLEDS 16
5665 static struct tpacpi_led_classdev *tpacpi_leds;
5666 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5667 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5668 /* there's a limit of 19 chars + NULL before 2.6.26 */
5669 "tpacpi::power",
5670 "tpacpi:orange:batt",
5671 "tpacpi:green:batt",
5672 "tpacpi::dock_active",
5673 "tpacpi::bay_active",
5674 "tpacpi::dock_batt",
5675 "tpacpi::unknown_led",
5676 "tpacpi::standby",
5677 "tpacpi::dock_status1",
5678 "tpacpi::dock_status2",
5679 "tpacpi::lid_logo_dot",
5680 "tpacpi::unknown_led3",
5681 "tpacpi::thinkvantage",
5682 };
5683 #define TPACPI_SAFE_LEDS 0x1481U
5684
tpacpi_is_led_restricted(const unsigned int led)5685 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5686 {
5687 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5688 return false;
5689 #else
5690 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5691 #endif
5692 }
5693
led_get_status(const unsigned int led)5694 static int led_get_status(const unsigned int led)
5695 {
5696 int status;
5697 enum led_status_t led_s;
5698
5699 switch (led_supported) {
5700 case TPACPI_LED_570:
5701 if (!acpi_evalf(ec_handle,
5702 &status, "GLED", "dd", 1 << led))
5703 return -EIO;
5704 led_s = (status == 0) ?
5705 TPACPI_LED_OFF :
5706 ((status == 1) ?
5707 TPACPI_LED_ON :
5708 TPACPI_LED_BLINK);
5709 tpacpi_led_state_cache[led] = led_s;
5710 return led_s;
5711 default:
5712 return -ENXIO;
5713 }
5714
5715 /* not reached */
5716 }
5717
led_set_status(const unsigned int led,const enum led_status_t ledstatus)5718 static int led_set_status(const unsigned int led,
5719 const enum led_status_t ledstatus)
5720 {
5721 /* off, on, blink. Index is led_status_t */
5722 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5723 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5724
5725 int rc = 0;
5726
5727 switch (led_supported) {
5728 case TPACPI_LED_570:
5729 /* 570 */
5730 if (unlikely(led > 7))
5731 return -EINVAL;
5732 if (unlikely(tpacpi_is_led_restricted(led)))
5733 return -EPERM;
5734 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5735 (1 << led), led_sled_arg1[ledstatus]))
5736 return -EIO;
5737 break;
5738 case TPACPI_LED_OLD:
5739 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5740 if (unlikely(led > 7))
5741 return -EINVAL;
5742 if (unlikely(tpacpi_is_led_restricted(led)))
5743 return -EPERM;
5744 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5745 if (rc >= 0)
5746 rc = ec_write(TPACPI_LED_EC_HLBL,
5747 (ledstatus == TPACPI_LED_BLINK) << led);
5748 if (rc >= 0)
5749 rc = ec_write(TPACPI_LED_EC_HLCL,
5750 (ledstatus != TPACPI_LED_OFF) << led);
5751 break;
5752 case TPACPI_LED_NEW:
5753 /* all others */
5754 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5755 return -EINVAL;
5756 if (unlikely(tpacpi_is_led_restricted(led)))
5757 return -EPERM;
5758 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5759 led, led_led_arg1[ledstatus]))
5760 return -EIO;
5761 break;
5762 default:
5763 return -ENXIO;
5764 }
5765
5766 if (!rc)
5767 tpacpi_led_state_cache[led] = ledstatus;
5768
5769 return rc;
5770 }
5771
led_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)5772 static int led_sysfs_set(struct led_classdev *led_cdev,
5773 enum led_brightness brightness)
5774 {
5775 struct tpacpi_led_classdev *data = container_of(led_cdev,
5776 struct tpacpi_led_classdev, led_classdev);
5777 enum led_status_t new_state;
5778
5779 if (brightness == LED_OFF)
5780 new_state = TPACPI_LED_OFF;
5781 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5782 new_state = TPACPI_LED_ON;
5783 else
5784 new_state = TPACPI_LED_BLINK;
5785
5786 return led_set_status(data->led, new_state);
5787 }
5788
led_sysfs_blink_set(struct led_classdev * led_cdev,unsigned long * delay_on,unsigned long * delay_off)5789 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5790 unsigned long *delay_on, unsigned long *delay_off)
5791 {
5792 struct tpacpi_led_classdev *data = container_of(led_cdev,
5793 struct tpacpi_led_classdev, led_classdev);
5794
5795 /* Can we choose the flash rate? */
5796 if (*delay_on == 0 && *delay_off == 0) {
5797 /* yes. set them to the hardware blink rate (1 Hz) */
5798 *delay_on = 500; /* ms */
5799 *delay_off = 500; /* ms */
5800 } else if ((*delay_on != 500) || (*delay_off != 500))
5801 return -EINVAL;
5802
5803 return led_set_status(data->led, TPACPI_LED_BLINK);
5804 }
5805
led_sysfs_get(struct led_classdev * led_cdev)5806 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5807 {
5808 int rc;
5809
5810 struct tpacpi_led_classdev *data = container_of(led_cdev,
5811 struct tpacpi_led_classdev, led_classdev);
5812
5813 rc = led_get_status(data->led);
5814
5815 if (rc == TPACPI_LED_OFF || rc < 0)
5816 rc = LED_OFF; /* no error handling in led class :( */
5817 else
5818 rc = LED_FULL;
5819
5820 return rc;
5821 }
5822
led_exit(void)5823 static void led_exit(void)
5824 {
5825 unsigned int i;
5826
5827 for (i = 0; i < TPACPI_LED_NUMLEDS; i++)
5828 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5829
5830 kfree(tpacpi_leds);
5831 }
5832
tpacpi_init_led(unsigned int led)5833 static int __init tpacpi_init_led(unsigned int led)
5834 {
5835 /* LEDs with no name don't get registered */
5836 if (!tpacpi_led_names[led])
5837 return 0;
5838
5839 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set;
5840 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5841 if (led_supported == TPACPI_LED_570)
5842 tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get;
5843
5844 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5845 tpacpi_leds[led].led_classdev.flags = LED_RETAIN_AT_SHUTDOWN;
5846 tpacpi_leds[led].led = led;
5847
5848 return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev);
5849 }
5850
5851 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5852 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5853 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5854 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5855
5856 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5857 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5858 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5859 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5860 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5861 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5862 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5863 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5864
5865 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5866 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5867 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5868 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5869 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5870
5871 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5872 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5873 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5874 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5875
5876 /* (1) - may have excess leds enabled on MSB */
5877
5878 /* Defaults (order matters, keep last, don't reorder!) */
5879 { /* Lenovo */
5880 .vendor = PCI_VENDOR_ID_LENOVO,
5881 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5882 .quirks = 0x1fffU,
5883 },
5884 { /* IBM ThinkPads with no EC version string */
5885 .vendor = PCI_VENDOR_ID_IBM,
5886 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5887 .quirks = 0x00ffU,
5888 },
5889 { /* IBM ThinkPads with EC version string */
5890 .vendor = PCI_VENDOR_ID_IBM,
5891 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5892 .quirks = 0x00bfU,
5893 },
5894 };
5895
led_init_detect_mode(void)5896 static enum led_access_mode __init led_init_detect_mode(void)
5897 {
5898 acpi_status status;
5899
5900 if (tpacpi_is_ibm()) {
5901 /* 570 */
5902 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5903 if (ACPI_SUCCESS(status))
5904 return TPACPI_LED_570;
5905
5906 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5907 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5908 if (ACPI_SUCCESS(status))
5909 return TPACPI_LED_OLD;
5910 }
5911
5912 /* most others */
5913 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5914 if (ACPI_SUCCESS(status))
5915 return TPACPI_LED_NEW;
5916
5917 /* R30, R31, and unknown firmwares */
5918 led_handle = NULL;
5919 return TPACPI_LED_NONE;
5920 }
5921
led_init(struct ibm_init_struct * iibm)5922 static int __init led_init(struct ibm_init_struct *iibm)
5923 {
5924 unsigned int i;
5925 int rc;
5926 unsigned long useful_leds;
5927
5928 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5929
5930 led_supported = led_init_detect_mode();
5931
5932 if (led_supported != TPACPI_LED_NONE) {
5933 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5934 ARRAY_SIZE(led_useful_qtable));
5935
5936 if (!useful_leds) {
5937 led_handle = NULL;
5938 led_supported = TPACPI_LED_NONE;
5939 }
5940 }
5941
5942 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5943 str_supported(led_supported), led_supported);
5944
5945 if (led_supported == TPACPI_LED_NONE)
5946 return -ENODEV;
5947
5948 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
5949 GFP_KERNEL);
5950 if (!tpacpi_leds) {
5951 pr_err("Out of memory for LED data\n");
5952 return -ENOMEM;
5953 }
5954
5955 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5956 tpacpi_leds[i].led = -1;
5957
5958 if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) {
5959 rc = tpacpi_init_led(i);
5960 if (rc < 0) {
5961 led_exit();
5962 return rc;
5963 }
5964 }
5965 }
5966
5967 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5968 pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
5969 #endif
5970 return 0;
5971 }
5972
5973 #define str_led_status(s) ((s) >= TPACPI_LED_BLINK ? "blinking" : str_on_off(s))
5974
led_read(struct seq_file * m)5975 static int led_read(struct seq_file *m)
5976 {
5977 if (!led_supported) {
5978 seq_printf(m, "status:\t\tnot supported\n");
5979 return 0;
5980 }
5981 seq_printf(m, "status:\t\tsupported\n");
5982
5983 if (led_supported == TPACPI_LED_570) {
5984 /* 570 */
5985 int i, status;
5986 for (i = 0; i < 8; i++) {
5987 status = led_get_status(i);
5988 if (status < 0)
5989 return -EIO;
5990 seq_printf(m, "%d:\t\t%s\n", i, str_led_status(status));
5991 }
5992 }
5993
5994 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5995
5996 return 0;
5997 }
5998
led_write(char * buf)5999 static int led_write(char *buf)
6000 {
6001 char *cmd;
6002 int led, rc;
6003 enum led_status_t s;
6004
6005 if (!led_supported)
6006 return -ENODEV;
6007
6008 while ((cmd = strsep(&buf, ","))) {
6009 if (sscanf(cmd, "%d", &led) != 1)
6010 return -EINVAL;
6011
6012 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1))
6013 return -ENODEV;
6014
6015 if (tpacpi_leds[led].led < 0)
6016 return -ENODEV;
6017
6018 if (strstr(cmd, "off")) {
6019 s = TPACPI_LED_OFF;
6020 } else if (strstr(cmd, "on")) {
6021 s = TPACPI_LED_ON;
6022 } else if (strstr(cmd, "blink")) {
6023 s = TPACPI_LED_BLINK;
6024 } else {
6025 return -EINVAL;
6026 }
6027
6028 rc = led_set_status(led, s);
6029 if (rc < 0)
6030 return rc;
6031 }
6032
6033 return 0;
6034 }
6035
6036 static struct ibm_struct led_driver_data = {
6037 .name = "led",
6038 .read = led_read,
6039 .write = led_write,
6040 .exit = led_exit,
6041 };
6042
6043 /*************************************************************************
6044 * Beep subdriver
6045 */
6046
6047 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
6048
6049 #define TPACPI_BEEP_Q1 0x0001
6050
6051 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
6052 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
6053 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
6054 };
6055
beep_init(struct ibm_init_struct * iibm)6056 static int __init beep_init(struct ibm_init_struct *iibm)
6057 {
6058 unsigned long quirks;
6059
6060 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
6061
6062 TPACPI_ACPIHANDLE_INIT(beep);
6063
6064 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
6065 str_supported(beep_handle != NULL));
6066
6067 quirks = tpacpi_check_quirks(beep_quirk_table,
6068 ARRAY_SIZE(beep_quirk_table));
6069
6070 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
6071
6072 return (beep_handle) ? 0 : -ENODEV;
6073 }
6074
beep_read(struct seq_file * m)6075 static int beep_read(struct seq_file *m)
6076 {
6077 if (!beep_handle)
6078 seq_printf(m, "status:\t\tnot supported\n");
6079 else {
6080 seq_printf(m, "status:\t\tsupported\n");
6081 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
6082 }
6083
6084 return 0;
6085 }
6086
beep_write(char * buf)6087 static int beep_write(char *buf)
6088 {
6089 char *cmd;
6090 int beep_cmd;
6091
6092 if (!beep_handle)
6093 return -ENODEV;
6094
6095 while ((cmd = strsep(&buf, ","))) {
6096 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
6097 beep_cmd >= 0 && beep_cmd <= 17) {
6098 /* beep_cmd set */
6099 } else
6100 return -EINVAL;
6101 if (tp_features.beep_needs_two_args) {
6102 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
6103 beep_cmd, 0))
6104 return -EIO;
6105 } else {
6106 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
6107 beep_cmd))
6108 return -EIO;
6109 }
6110 }
6111
6112 return 0;
6113 }
6114
6115 static struct ibm_struct beep_driver_data = {
6116 .name = "beep",
6117 .read = beep_read,
6118 .write = beep_write,
6119 };
6120
6121 /*************************************************************************
6122 * Thermal subdriver
6123 */
6124
6125 enum thermal_access_mode {
6126 TPACPI_THERMAL_NONE = 0, /* No thermal support */
6127 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
6128 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
6129 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
6130 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
6131 };
6132
6133 enum { /* TPACPI_THERMAL_TPEC_* */
6134 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
6135 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
6136 TP_EC_FUNCREV = 0xEF, /* ACPI EC Functional revision */
6137 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
6138
6139 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
6140 };
6141
6142
6143 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
6144 struct ibm_thermal_sensors_struct {
6145 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
6146 };
6147
6148 static enum thermal_access_mode thermal_read_mode;
6149 static bool thermal_use_labels;
6150
6151 /* idx is zero-based */
thermal_get_sensor(int idx,s32 * value)6152 static int thermal_get_sensor(int idx, s32 *value)
6153 {
6154 int t;
6155 s8 tmp;
6156 char tmpi[5];
6157
6158 t = TP_EC_THERMAL_TMP0;
6159
6160 switch (thermal_read_mode) {
6161 #if TPACPI_MAX_THERMAL_SENSORS >= 16
6162 case TPACPI_THERMAL_TPEC_16:
6163 if (idx >= 8 && idx <= 15) {
6164 t = TP_EC_THERMAL_TMP8;
6165 idx -= 8;
6166 }
6167 #endif
6168 fallthrough;
6169 case TPACPI_THERMAL_TPEC_8:
6170 if (idx <= 7) {
6171 if (!acpi_ec_read(t + idx, &tmp))
6172 return -EIO;
6173 *value = tmp * 1000;
6174 return 0;
6175 }
6176 break;
6177
6178 case TPACPI_THERMAL_ACPI_UPDT:
6179 if (idx <= 7) {
6180 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6181 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
6182 return -EIO;
6183 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6184 return -EIO;
6185 *value = (t - 2732) * 100;
6186 return 0;
6187 }
6188 break;
6189
6190 case TPACPI_THERMAL_ACPI_TMP07:
6191 if (idx <= 7) {
6192 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6193 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6194 return -EIO;
6195 if (t > 127 || t < -127)
6196 t = TP_EC_THERMAL_TMP_NA;
6197 *value = t * 1000;
6198 return 0;
6199 }
6200 break;
6201
6202 case TPACPI_THERMAL_NONE:
6203 default:
6204 return -ENOSYS;
6205 }
6206
6207 return -EINVAL;
6208 }
6209
thermal_get_sensors(struct ibm_thermal_sensors_struct * s)6210 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
6211 {
6212 int res, i;
6213 int n;
6214
6215 n = 8;
6216 i = 0;
6217
6218 if (!s)
6219 return -EINVAL;
6220
6221 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
6222 n = 16;
6223
6224 for (i = 0 ; i < n; i++) {
6225 res = thermal_get_sensor(i, &s->temp[i]);
6226 if (res)
6227 return res;
6228 }
6229
6230 return n;
6231 }
6232
thermal_dump_all_sensors(void)6233 static void thermal_dump_all_sensors(void)
6234 {
6235 int n, i;
6236 struct ibm_thermal_sensors_struct t;
6237
6238 n = thermal_get_sensors(&t);
6239 if (n <= 0)
6240 return;
6241
6242 pr_notice("temperatures (Celsius):");
6243
6244 for (i = 0; i < n; i++) {
6245 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
6246 pr_cont(" %d", (int)(t.temp[i] / 1000));
6247 else
6248 pr_cont(" N/A");
6249 }
6250
6251 pr_cont("\n");
6252 }
6253
6254 /* sysfs temp##_input -------------------------------------------------- */
6255
thermal_temp_input_show(struct device * dev,struct device_attribute * attr,char * buf)6256 static ssize_t thermal_temp_input_show(struct device *dev,
6257 struct device_attribute *attr,
6258 char *buf)
6259 {
6260 struct sensor_device_attribute *sensor_attr =
6261 to_sensor_dev_attr(attr);
6262 int idx = sensor_attr->index;
6263 s32 value;
6264 int res;
6265
6266 res = thermal_get_sensor(idx, &value);
6267 if (res)
6268 return res;
6269 if (value == TPACPI_THERMAL_SENSOR_NA)
6270 return -ENXIO;
6271
6272 return sysfs_emit(buf, "%d\n", value);
6273 }
6274
6275 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
6276 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
6277 thermal_temp_input_show, NULL, _idxB)
6278
6279 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
6280 THERMAL_SENSOR_ATTR_TEMP(1, 0),
6281 THERMAL_SENSOR_ATTR_TEMP(2, 1),
6282 THERMAL_SENSOR_ATTR_TEMP(3, 2),
6283 THERMAL_SENSOR_ATTR_TEMP(4, 3),
6284 THERMAL_SENSOR_ATTR_TEMP(5, 4),
6285 THERMAL_SENSOR_ATTR_TEMP(6, 5),
6286 THERMAL_SENSOR_ATTR_TEMP(7, 6),
6287 THERMAL_SENSOR_ATTR_TEMP(8, 7),
6288 THERMAL_SENSOR_ATTR_TEMP(9, 8),
6289 THERMAL_SENSOR_ATTR_TEMP(10, 9),
6290 THERMAL_SENSOR_ATTR_TEMP(11, 10),
6291 THERMAL_SENSOR_ATTR_TEMP(12, 11),
6292 THERMAL_SENSOR_ATTR_TEMP(13, 12),
6293 THERMAL_SENSOR_ATTR_TEMP(14, 13),
6294 THERMAL_SENSOR_ATTR_TEMP(15, 14),
6295 THERMAL_SENSOR_ATTR_TEMP(16, 15),
6296 };
6297
6298 #define THERMAL_ATTRS(X) \
6299 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
6300
6301 static struct attribute *thermal_temp_input_attr[] = {
6302 THERMAL_ATTRS(0),
6303 THERMAL_ATTRS(1),
6304 THERMAL_ATTRS(2),
6305 THERMAL_ATTRS(3),
6306 THERMAL_ATTRS(4),
6307 THERMAL_ATTRS(5),
6308 THERMAL_ATTRS(6),
6309 THERMAL_ATTRS(7),
6310 THERMAL_ATTRS(8),
6311 THERMAL_ATTRS(9),
6312 THERMAL_ATTRS(10),
6313 THERMAL_ATTRS(11),
6314 THERMAL_ATTRS(12),
6315 THERMAL_ATTRS(13),
6316 THERMAL_ATTRS(14),
6317 THERMAL_ATTRS(15),
6318 NULL
6319 };
6320
thermal_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)6321 static umode_t thermal_attr_is_visible(struct kobject *kobj,
6322 struct attribute *attr, int n)
6323 {
6324 if (thermal_read_mode == TPACPI_THERMAL_NONE)
6325 return 0;
6326
6327 if (attr == THERMAL_ATTRS(8) || attr == THERMAL_ATTRS(9) ||
6328 attr == THERMAL_ATTRS(10) || attr == THERMAL_ATTRS(11) ||
6329 attr == THERMAL_ATTRS(12) || attr == THERMAL_ATTRS(13) ||
6330 attr == THERMAL_ATTRS(14) || attr == THERMAL_ATTRS(15)) {
6331 if (thermal_read_mode != TPACPI_THERMAL_TPEC_16)
6332 return 0;
6333 }
6334
6335 return attr->mode;
6336 }
6337
6338 static const struct attribute_group thermal_attr_group = {
6339 .is_visible = thermal_attr_is_visible,
6340 .attrs = thermal_temp_input_attr,
6341 };
6342
6343 #undef THERMAL_SENSOR_ATTR_TEMP
6344 #undef THERMAL_ATTRS
6345
temp1_label_show(struct device * dev,struct device_attribute * attr,char * buf)6346 static ssize_t temp1_label_show(struct device *dev, struct device_attribute *attr, char *buf)
6347 {
6348 return sysfs_emit(buf, "CPU\n");
6349 }
6350 static DEVICE_ATTR_RO(temp1_label);
6351
temp2_label_show(struct device * dev,struct device_attribute * attr,char * buf)6352 static ssize_t temp2_label_show(struct device *dev, struct device_attribute *attr, char *buf)
6353 {
6354 return sysfs_emit(buf, "GPU\n");
6355 }
6356 static DEVICE_ATTR_RO(temp2_label);
6357
6358 static struct attribute *temp_label_attributes[] = {
6359 &dev_attr_temp1_label.attr,
6360 &dev_attr_temp2_label.attr,
6361 NULL
6362 };
6363
temp_label_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)6364 static umode_t temp_label_attr_is_visible(struct kobject *kobj,
6365 struct attribute *attr, int n)
6366 {
6367 return thermal_use_labels ? attr->mode : 0;
6368 }
6369
6370 static const struct attribute_group temp_label_attr_group = {
6371 .is_visible = temp_label_attr_is_visible,
6372 .attrs = temp_label_attributes,
6373 };
6374
6375 /* --------------------------------------------------------------------- */
6376
thermal_init(struct ibm_init_struct * iibm)6377 static int __init thermal_init(struct ibm_init_struct *iibm)
6378 {
6379 u8 t, ta1, ta2, ver = 0;
6380 int i;
6381 int acpi_tmp7;
6382
6383 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
6384
6385 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
6386
6387 if (thinkpad_id.ec_model) {
6388 /*
6389 * Direct EC access mode: sensors at registers
6390 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
6391 * non-implemented, thermal sensors return 0x80 when
6392 * not available
6393 * The above rule is unfortunately flawed. This has been seen with
6394 * 0xC2 (power supply ID) causing thermal control problems.
6395 * The EC version can be determined by offset 0xEF and at least for
6396 * version 3 the Lenovo firmware team confirmed that registers 0xC0-0xC7
6397 * are not thermal registers.
6398 */
6399 if (!acpi_ec_read(TP_EC_FUNCREV, &ver))
6400 pr_warn("Thinkpad ACPI EC unable to access EC version\n");
6401
6402 ta1 = ta2 = 0;
6403 for (i = 0; i < 8; i++) {
6404 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
6405 ta1 |= t;
6406 } else {
6407 ta1 = 0;
6408 break;
6409 }
6410 if (ver < 3) {
6411 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
6412 ta2 |= t;
6413 } else {
6414 ta1 = 0;
6415 break;
6416 }
6417 }
6418 }
6419 if (ta1 == 0) {
6420 /* This is sheer paranoia, but we handle it anyway */
6421 if (acpi_tmp7) {
6422 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
6423 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6424 } else {
6425 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
6426 thermal_read_mode = TPACPI_THERMAL_NONE;
6427 }
6428 } else {
6429 if (ver >= 3) {
6430 thermal_read_mode = TPACPI_THERMAL_TPEC_8;
6431 thermal_use_labels = true;
6432 } else {
6433 thermal_read_mode =
6434 (ta2 != 0) ?
6435 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6436 }
6437 }
6438 } else if (acpi_tmp7) {
6439 if (tpacpi_is_ibm() &&
6440 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6441 /* 600e/x, 770e, 770x */
6442 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6443 } else {
6444 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6445 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6446 }
6447 } else {
6448 /* temperatures not supported on 570, G4x, R30, R31, R32 */
6449 thermal_read_mode = TPACPI_THERMAL_NONE;
6450 }
6451
6452 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6453 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6454 thermal_read_mode);
6455
6456 return thermal_read_mode != TPACPI_THERMAL_NONE ? 0 : -ENODEV;
6457 }
6458
thermal_read(struct seq_file * m)6459 static int thermal_read(struct seq_file *m)
6460 {
6461 int n, i;
6462 struct ibm_thermal_sensors_struct t;
6463
6464 n = thermal_get_sensors(&t);
6465 if (unlikely(n < 0))
6466 return n;
6467
6468 seq_printf(m, "temperatures:\t");
6469
6470 if (n > 0) {
6471 for (i = 0; i < (n - 1); i++)
6472 seq_printf(m, "%d ", t.temp[i] / 1000);
6473 seq_printf(m, "%d\n", t.temp[i] / 1000);
6474 } else
6475 seq_printf(m, "not supported\n");
6476
6477 return 0;
6478 }
6479
6480 static struct ibm_struct thermal_driver_data = {
6481 .name = "thermal",
6482 .read = thermal_read,
6483 };
6484
6485 /*************************************************************************
6486 * Backlight/brightness subdriver
6487 */
6488
6489 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6490
6491 /*
6492 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6493 * CMOS NVRAM byte 0x5E, bits 0-3.
6494 *
6495 * EC HBRV (0x31) has the following layout
6496 * Bit 7: unknown function
6497 * Bit 6: unknown function
6498 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
6499 * Bit 4: must be set to zero to avoid problems
6500 * Bit 3-0: backlight brightness level
6501 *
6502 * brightness_get_raw returns status data in the HBRV layout
6503 *
6504 * WARNING: The X61 has been verified to use HBRV for something else, so
6505 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6506 * testing on the very early *60 Lenovo models...
6507 */
6508
6509 enum {
6510 TP_EC_BACKLIGHT = 0x31,
6511
6512 /* TP_EC_BACKLIGHT bitmasks */
6513 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6514 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6515 TP_EC_BACKLIGHT_MAPSW = 0x20,
6516 };
6517
6518 enum tpacpi_brightness_access_mode {
6519 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
6520 TPACPI_BRGHT_MODE_EC, /* EC control */
6521 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
6522 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6523 TPACPI_BRGHT_MODE_MAX
6524 };
6525
6526 static struct backlight_device *ibm_backlight_device;
6527
6528 static enum tpacpi_brightness_access_mode brightness_mode =
6529 TPACPI_BRGHT_MODE_MAX;
6530
6531 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6532
6533 static struct mutex brightness_mutex;
6534
6535 /* NVRAM brightness access */
tpacpi_brightness_nvram_get(void)6536 static unsigned int tpacpi_brightness_nvram_get(void)
6537 {
6538 u8 lnvram;
6539
6540 lockdep_assert_held(&brightness_mutex);
6541
6542 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6543 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6544 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6545 lnvram &= bright_maxlvl;
6546
6547 return lnvram;
6548 }
6549
tpacpi_brightness_checkpoint_nvram(void)6550 static void tpacpi_brightness_checkpoint_nvram(void)
6551 {
6552 u8 lec = 0;
6553 u8 b_nvram;
6554
6555 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6556 return;
6557
6558 vdbg_printk(TPACPI_DBG_BRGHT,
6559 "trying to checkpoint backlight level to NVRAM...\n");
6560
6561 if (mutex_lock_killable(&brightness_mutex) < 0)
6562 return;
6563
6564 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6565 goto unlock;
6566 lec &= TP_EC_BACKLIGHT_LVLMSK;
6567 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6568
6569 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6570 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6571 /* NVRAM needs update */
6572 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6573 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6574 b_nvram |= lec;
6575 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6576 dbg_printk(TPACPI_DBG_BRGHT,
6577 "updated NVRAM backlight level to %u (0x%02x)\n",
6578 (unsigned int) lec, (unsigned int) b_nvram);
6579 } else
6580 vdbg_printk(TPACPI_DBG_BRGHT,
6581 "NVRAM backlight level already is %u (0x%02x)\n",
6582 (unsigned int) lec, (unsigned int) b_nvram);
6583
6584 unlock:
6585 mutex_unlock(&brightness_mutex);
6586 }
6587
6588
tpacpi_brightness_get_raw(int * status)6589 static int tpacpi_brightness_get_raw(int *status)
6590 {
6591 u8 lec = 0;
6592
6593 lockdep_assert_held(&brightness_mutex);
6594
6595 switch (brightness_mode) {
6596 case TPACPI_BRGHT_MODE_UCMS_STEP:
6597 *status = tpacpi_brightness_nvram_get();
6598 return 0;
6599 case TPACPI_BRGHT_MODE_EC:
6600 case TPACPI_BRGHT_MODE_ECNVRAM:
6601 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6602 return -EIO;
6603 *status = lec;
6604 return 0;
6605 default:
6606 return -ENXIO;
6607 }
6608 }
6609
6610 /* do NOT call with illegal backlight level value */
tpacpi_brightness_set_ec(unsigned int value)6611 static int tpacpi_brightness_set_ec(unsigned int value)
6612 {
6613 u8 lec = 0;
6614
6615 lockdep_assert_held(&brightness_mutex);
6616
6617 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6618 return -EIO;
6619
6620 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6621 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6622 (value & TP_EC_BACKLIGHT_LVLMSK))))
6623 return -EIO;
6624
6625 return 0;
6626 }
6627
tpacpi_brightness_set_ucmsstep(unsigned int value)6628 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6629 {
6630 int cmos_cmd, inc;
6631 unsigned int current_value, i;
6632
6633 lockdep_assert_held(&brightness_mutex);
6634
6635 current_value = tpacpi_brightness_nvram_get();
6636
6637 if (value == current_value)
6638 return 0;
6639
6640 cmos_cmd = (value > current_value) ?
6641 TP_CMOS_BRIGHTNESS_UP :
6642 TP_CMOS_BRIGHTNESS_DOWN;
6643 inc = (value > current_value) ? 1 : -1;
6644
6645 for (i = current_value; i != value; i += inc)
6646 if (issue_thinkpad_cmos_command(cmos_cmd))
6647 return -EIO;
6648
6649 return 0;
6650 }
6651
6652 /* May return EINTR which can always be mapped to ERESTARTSYS */
brightness_set(unsigned int value)6653 static int brightness_set(unsigned int value)
6654 {
6655 int res;
6656
6657 if (value > bright_maxlvl)
6658 return -EINVAL;
6659
6660 vdbg_printk(TPACPI_DBG_BRGHT,
6661 "set backlight level to %d\n", value);
6662
6663 res = mutex_lock_killable(&brightness_mutex);
6664 if (res < 0)
6665 return res;
6666
6667 switch (brightness_mode) {
6668 case TPACPI_BRGHT_MODE_EC:
6669 case TPACPI_BRGHT_MODE_ECNVRAM:
6670 res = tpacpi_brightness_set_ec(value);
6671 break;
6672 case TPACPI_BRGHT_MODE_UCMS_STEP:
6673 res = tpacpi_brightness_set_ucmsstep(value);
6674 break;
6675 default:
6676 res = -ENXIO;
6677 }
6678
6679 mutex_unlock(&brightness_mutex);
6680 return res;
6681 }
6682
6683 /* sysfs backlight class ----------------------------------------------- */
6684
brightness_update_status(struct backlight_device * bd)6685 static int brightness_update_status(struct backlight_device *bd)
6686 {
6687 int level = backlight_get_brightness(bd);
6688
6689 dbg_printk(TPACPI_DBG_BRGHT,
6690 "backlight: attempt to set level to %d\n",
6691 level);
6692
6693 /* it is the backlight class's job (caller) to handle
6694 * EINTR and other errors properly */
6695 return brightness_set(level);
6696 }
6697
brightness_get(struct backlight_device * bd)6698 static int brightness_get(struct backlight_device *bd)
6699 {
6700 int status, res;
6701
6702 res = mutex_lock_killable(&brightness_mutex);
6703 if (res < 0)
6704 return 0;
6705
6706 res = tpacpi_brightness_get_raw(&status);
6707
6708 mutex_unlock(&brightness_mutex);
6709
6710 if (res < 0)
6711 return 0;
6712
6713 return status & TP_EC_BACKLIGHT_LVLMSK;
6714 }
6715
tpacpi_brightness_notify_change(void)6716 static void tpacpi_brightness_notify_change(void)
6717 {
6718 backlight_force_update(ibm_backlight_device,
6719 BACKLIGHT_UPDATE_HOTKEY);
6720 }
6721
6722 static const struct backlight_ops ibm_backlight_data = {
6723 .get_brightness = brightness_get,
6724 .update_status = brightness_update_status,
6725 };
6726
6727 /* --------------------------------------------------------------------- */
6728
tpacpi_evaluate_bcl(struct acpi_device * adev,void * not_used)6729 static int __init tpacpi_evaluate_bcl(struct acpi_device *adev, void *not_used)
6730 {
6731 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6732 union acpi_object *obj;
6733 acpi_status status;
6734 int rc;
6735
6736 status = acpi_evaluate_object(adev->handle, "_BCL", NULL, &buffer);
6737 if (ACPI_FAILURE(status))
6738 return 0;
6739
6740 obj = buffer.pointer;
6741 if (!obj || obj->type != ACPI_TYPE_PACKAGE) {
6742 acpi_handle_info(adev->handle,
6743 "Unknown _BCL data, please report this to %s\n",
6744 TPACPI_MAIL);
6745 rc = 0;
6746 } else {
6747 rc = obj->package.count;
6748 }
6749 kfree(obj);
6750
6751 return rc;
6752 }
6753
6754 /*
6755 * Call _BCL method of video device. On some ThinkPads this will
6756 * switch the firmware to the ACPI brightness control mode.
6757 */
6758
tpacpi_query_bcl_levels(acpi_handle handle)6759 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6760 {
6761 struct acpi_device *device;
6762
6763 device = acpi_fetch_acpi_dev(handle);
6764 if (!device)
6765 return 0;
6766
6767 return acpi_dev_for_each_child(device, tpacpi_evaluate_bcl, NULL);
6768 }
6769
6770
6771 /*
6772 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6773 */
tpacpi_check_std_acpi_brightness_support(void)6774 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6775 {
6776 acpi_handle video_device;
6777 int bcl_levels = 0;
6778
6779 tpacpi_acpi_handle_locate("video", NULL, &video_device);
6780 if (video_device)
6781 bcl_levels = tpacpi_query_bcl_levels(video_device);
6782
6783 tp_features.bright_acpimode = (bcl_levels > 0);
6784
6785 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6786 }
6787
6788 /*
6789 * These are only useful for models that have only one possibility
6790 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6791 * these quirks.
6792 */
6793 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6794 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6795 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6796
6797 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6798 /* Models with ATI GPUs known to require ECNVRAM mode */
6799 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6800
6801 /* Models with ATI GPUs that can use ECNVRAM */
6802 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6803 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6804 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6805 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6806
6807 /* Models with Intel Extreme Graphics 2 */
6808 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6809 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6810 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6811
6812 /* Models with Intel GMA900 */
6813 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6814 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6815 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6816 };
6817
6818 /*
6819 * Returns < 0 for error, otherwise sets tp_features.bright_*
6820 * and bright_maxlvl.
6821 */
tpacpi_detect_brightness_capabilities(void)6822 static void __init tpacpi_detect_brightness_capabilities(void)
6823 {
6824 unsigned int b;
6825
6826 vdbg_printk(TPACPI_DBG_INIT,
6827 "detecting firmware brightness interface capabilities\n");
6828
6829 /* we could run a quirks check here (same table used by
6830 * brightness_init) if needed */
6831
6832 /*
6833 * We always attempt to detect acpi support, so as to switch
6834 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6835 * going to publish a backlight interface
6836 */
6837 b = tpacpi_check_std_acpi_brightness_support();
6838 switch (b) {
6839 case 16:
6840 bright_maxlvl = 15;
6841 break;
6842 case 8:
6843 case 0:
6844 bright_maxlvl = 7;
6845 break;
6846 default:
6847 tp_features.bright_unkfw = 1;
6848 bright_maxlvl = b - 1;
6849 }
6850 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
6851 }
6852
brightness_init(struct ibm_init_struct * iibm)6853 static int __init brightness_init(struct ibm_init_struct *iibm)
6854 {
6855 struct backlight_properties props;
6856 int b;
6857 unsigned long quirks;
6858
6859 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6860
6861 mutex_init(&brightness_mutex);
6862
6863 quirks = tpacpi_check_quirks(brightness_quirk_table,
6864 ARRAY_SIZE(brightness_quirk_table));
6865
6866 /* tpacpi_detect_brightness_capabilities() must have run already */
6867
6868 /* if it is unknown, we don't handle it: it wouldn't be safe */
6869 if (tp_features.bright_unkfw)
6870 return -ENODEV;
6871
6872 if (!brightness_enable) {
6873 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6874 "brightness support disabled by module parameter\n");
6875 return -ENODEV;
6876 }
6877
6878 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6879 if (brightness_enable > 1) {
6880 pr_info("Standard ACPI backlight interface available, not loading native one\n");
6881 return -ENODEV;
6882 } else if (brightness_enable == 1) {
6883 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n");
6884 return -ENODEV;
6885 }
6886 } else if (!tp_features.bright_acpimode) {
6887 pr_notice("ACPI backlight interface not available\n");
6888 return -ENODEV;
6889 }
6890
6891 pr_notice("ACPI native brightness control enabled\n");
6892
6893 /*
6894 * Check for module parameter bogosity, note that we
6895 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6896 * able to detect "unspecified"
6897 */
6898 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6899 return -EINVAL;
6900
6901 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6902 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6903 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6904 if (quirks & TPACPI_BRGHT_Q_EC)
6905 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6906 else
6907 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6908
6909 dbg_printk(TPACPI_DBG_BRGHT,
6910 "driver auto-selected brightness_mode=%d\n",
6911 brightness_mode);
6912 }
6913
6914 /* Safety */
6915 if (!tpacpi_is_ibm() &&
6916 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6917 brightness_mode == TPACPI_BRGHT_MODE_EC))
6918 return -EINVAL;
6919
6920 if (tpacpi_brightness_get_raw(&b) < 0)
6921 return -ENODEV;
6922
6923 memset(&props, 0, sizeof(struct backlight_properties));
6924 props.type = BACKLIGHT_PLATFORM;
6925 props.max_brightness = bright_maxlvl;
6926 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6927 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6928 NULL, NULL,
6929 &ibm_backlight_data,
6930 &props);
6931 if (IS_ERR(ibm_backlight_device)) {
6932 int rc = PTR_ERR(ibm_backlight_device);
6933 ibm_backlight_device = NULL;
6934 pr_err("Could not register backlight device\n");
6935 return rc;
6936 }
6937 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6938 "brightness is supported\n");
6939
6940 if (quirks & TPACPI_BRGHT_Q_ASK) {
6941 pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
6942 brightness_mode);
6943 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
6944 TPACPI_MAIL);
6945 }
6946
6947 /* Added by mistake in early 2007. Probably useless, but it could
6948 * be working around some unknown firmware problem where the value
6949 * read at startup doesn't match the real hardware state... so leave
6950 * it in place just in case */
6951 backlight_update_status(ibm_backlight_device);
6952
6953 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6954 "brightness: registering brightness hotkeys as change notification\n");
6955 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6956 | TP_ACPI_HKEY_BRGHTUP_MASK
6957 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6958 return 0;
6959 }
6960
brightness_suspend(void)6961 static void brightness_suspend(void)
6962 {
6963 tpacpi_brightness_checkpoint_nvram();
6964 }
6965
brightness_shutdown(void)6966 static void brightness_shutdown(void)
6967 {
6968 tpacpi_brightness_checkpoint_nvram();
6969 }
6970
brightness_exit(void)6971 static void brightness_exit(void)
6972 {
6973 if (ibm_backlight_device) {
6974 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6975 "calling backlight_device_unregister()\n");
6976 backlight_device_unregister(ibm_backlight_device);
6977 }
6978
6979 tpacpi_brightness_checkpoint_nvram();
6980 }
6981
brightness_read(struct seq_file * m)6982 static int brightness_read(struct seq_file *m)
6983 {
6984 int level;
6985
6986 level = brightness_get(NULL);
6987 if (level < 0) {
6988 seq_printf(m, "level:\t\tunreadable\n");
6989 } else {
6990 seq_printf(m, "level:\t\t%d\n", level);
6991 seq_printf(m, "commands:\tup, down\n");
6992 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6993 bright_maxlvl);
6994 }
6995
6996 return 0;
6997 }
6998
brightness_write(char * buf)6999 static int brightness_write(char *buf)
7000 {
7001 int level;
7002 int rc;
7003 char *cmd;
7004
7005 level = brightness_get(NULL);
7006 if (level < 0)
7007 return level;
7008
7009 while ((cmd = strsep(&buf, ","))) {
7010 if (strstarts(cmd, "up")) {
7011 if (level < bright_maxlvl)
7012 level++;
7013 } else if (strstarts(cmd, "down")) {
7014 if (level > 0)
7015 level--;
7016 } else if (sscanf(cmd, "level %d", &level) == 1 &&
7017 level >= 0 && level <= bright_maxlvl) {
7018 /* new level set */
7019 } else
7020 return -EINVAL;
7021 }
7022
7023 tpacpi_disclose_usertask("procfs brightness",
7024 "set level to %d\n", level);
7025
7026 /*
7027 * Now we know what the final level should be, so we try to set it.
7028 * Doing it this way makes the syscall restartable in case of EINTR
7029 */
7030 rc = brightness_set(level);
7031 if (!rc && ibm_backlight_device)
7032 backlight_force_update(ibm_backlight_device,
7033 BACKLIGHT_UPDATE_SYSFS);
7034 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7035 }
7036
7037 static struct ibm_struct brightness_driver_data = {
7038 .name = "brightness",
7039 .read = brightness_read,
7040 .write = brightness_write,
7041 .exit = brightness_exit,
7042 .suspend = brightness_suspend,
7043 .shutdown = brightness_shutdown,
7044 };
7045
7046 /*************************************************************************
7047 * Volume subdriver
7048 */
7049
7050 /*
7051 * IBM ThinkPads have a simple volume controller with MUTE gating.
7052 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
7053 *
7054 * Since the *61 series (and probably also the later *60 series), Lenovo
7055 * ThinkPads only implement the MUTE gate.
7056 *
7057 * EC register 0x30
7058 * Bit 6: MUTE (1 mutes sound)
7059 * Bit 3-0: Volume
7060 * Other bits should be zero as far as we know.
7061 *
7062 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
7063 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
7064 * such as bit 7 which is used to detect repeated presses of MUTE,
7065 * and we leave them unchanged.
7066 *
7067 * On newer Lenovo ThinkPads, the EC can automatically change the volume
7068 * in response to user input. Unfortunately, this rarely works well.
7069 * The laptop changes the state of its internal MUTE gate and, on some
7070 * models, sends KEY_MUTE, causing any user code that responds to the
7071 * mute button to get confused. The hardware MUTE gate is also
7072 * unnecessary, since user code can handle the mute button without
7073 * kernel or EC help.
7074 *
7075 * To avoid confusing userspace, we simply disable all EC-based mute
7076 * and volume controls when possible.
7077 */
7078
7079 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
7080
7081 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
7082 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
7083 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
7084
7085 #if SNDRV_CARDS <= 32
7086 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1)
7087 #else
7088 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1)
7089 #endif
7090 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
7091 static char *alsa_id = "ThinkPadEC";
7092 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
7093
7094 struct tpacpi_alsa_data {
7095 struct snd_card *card;
7096 struct snd_ctl_elem_id *ctl_mute_id;
7097 struct snd_ctl_elem_id *ctl_vol_id;
7098 };
7099
7100 static struct snd_card *alsa_card;
7101
7102 enum {
7103 TP_EC_AUDIO = 0x30,
7104
7105 /* TP_EC_AUDIO bits */
7106 TP_EC_AUDIO_MUTESW = 6,
7107
7108 /* TP_EC_AUDIO bitmasks */
7109 TP_EC_AUDIO_LVL_MSK = 0x0F,
7110 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
7111
7112 /* Maximum volume */
7113 TP_EC_VOLUME_MAX = 14,
7114 };
7115
7116 enum tpacpi_volume_access_mode {
7117 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
7118 TPACPI_VOL_MODE_EC, /* Pure EC control */
7119 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
7120 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
7121 TPACPI_VOL_MODE_MAX
7122 };
7123
7124 enum tpacpi_volume_capabilities {
7125 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
7126 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
7127 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
7128 TPACPI_VOL_CAP_MAX
7129 };
7130
7131 enum tpacpi_mute_btn_mode {
7132 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */
7133 /* We don't know what mode 1 is. */
7134 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */
7135 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */
7136 };
7137
7138 static enum tpacpi_volume_access_mode volume_mode =
7139 TPACPI_VOL_MODE_MAX;
7140
7141 static enum tpacpi_volume_capabilities volume_capabilities;
7142 static bool volume_control_allowed;
7143 static bool software_mute_requested = true;
7144 static bool software_mute_active;
7145 static int software_mute_orig_mode;
7146
7147 /*
7148 * Used to syncronize writers to TP_EC_AUDIO and
7149 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
7150 */
7151 static struct mutex volume_mutex;
7152
tpacpi_volume_checkpoint_nvram(void)7153 static void tpacpi_volume_checkpoint_nvram(void)
7154 {
7155 u8 lec = 0;
7156 u8 b_nvram;
7157 u8 ec_mask;
7158
7159 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
7160 return;
7161 if (!volume_control_allowed)
7162 return;
7163 if (software_mute_active)
7164 return;
7165
7166 vdbg_printk(TPACPI_DBG_MIXER,
7167 "trying to checkpoint mixer state to NVRAM...\n");
7168
7169 if (tp_features.mixer_no_level_control)
7170 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
7171 else
7172 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
7173
7174 if (mutex_lock_killable(&volume_mutex) < 0)
7175 return;
7176
7177 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
7178 goto unlock;
7179 lec &= ec_mask;
7180 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
7181
7182 if (lec != (b_nvram & ec_mask)) {
7183 /* NVRAM needs update */
7184 b_nvram &= ~ec_mask;
7185 b_nvram |= lec;
7186 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
7187 dbg_printk(TPACPI_DBG_MIXER,
7188 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
7189 (unsigned int) lec, (unsigned int) b_nvram);
7190 } else {
7191 vdbg_printk(TPACPI_DBG_MIXER,
7192 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
7193 (unsigned int) lec, (unsigned int) b_nvram);
7194 }
7195
7196 unlock:
7197 mutex_unlock(&volume_mutex);
7198 }
7199
volume_get_status_ec(u8 * status)7200 static int volume_get_status_ec(u8 *status)
7201 {
7202 u8 s;
7203
7204 if (!acpi_ec_read(TP_EC_AUDIO, &s))
7205 return -EIO;
7206
7207 *status = s;
7208
7209 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
7210
7211 return 0;
7212 }
7213
volume_get_status(u8 * status)7214 static int volume_get_status(u8 *status)
7215 {
7216 return volume_get_status_ec(status);
7217 }
7218
volume_set_status_ec(const u8 status)7219 static int volume_set_status_ec(const u8 status)
7220 {
7221 if (!acpi_ec_write(TP_EC_AUDIO, status))
7222 return -EIO;
7223
7224 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
7225
7226 /*
7227 * On X200s, and possibly on others, it can take a while for
7228 * reads to become correct.
7229 */
7230 msleep(1);
7231
7232 return 0;
7233 }
7234
volume_set_status(const u8 status)7235 static int volume_set_status(const u8 status)
7236 {
7237 return volume_set_status_ec(status);
7238 }
7239
7240 /* returns < 0 on error, 0 on no change, 1 on change */
__volume_set_mute_ec(const bool mute)7241 static int __volume_set_mute_ec(const bool mute)
7242 {
7243 int rc;
7244 u8 s, n;
7245
7246 if (mutex_lock_killable(&volume_mutex) < 0)
7247 return -EINTR;
7248
7249 rc = volume_get_status_ec(&s);
7250 if (rc)
7251 goto unlock;
7252
7253 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
7254 s & ~TP_EC_AUDIO_MUTESW_MSK;
7255
7256 if (n != s) {
7257 rc = volume_set_status_ec(n);
7258 if (!rc)
7259 rc = 1;
7260 }
7261
7262 unlock:
7263 mutex_unlock(&volume_mutex);
7264 return rc;
7265 }
7266
volume_alsa_set_mute(const bool mute)7267 static int volume_alsa_set_mute(const bool mute)
7268 {
7269 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
7270 (mute) ? "" : "un");
7271 return __volume_set_mute_ec(mute);
7272 }
7273
volume_set_mute(const bool mute)7274 static int volume_set_mute(const bool mute)
7275 {
7276 int rc;
7277
7278 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
7279 (mute) ? "" : "un");
7280
7281 rc = __volume_set_mute_ec(mute);
7282 return (rc < 0) ? rc : 0;
7283 }
7284
7285 /* returns < 0 on error, 0 on no change, 1 on change */
__volume_set_volume_ec(const u8 vol)7286 static int __volume_set_volume_ec(const u8 vol)
7287 {
7288 int rc;
7289 u8 s, n;
7290
7291 if (vol > TP_EC_VOLUME_MAX)
7292 return -EINVAL;
7293
7294 if (mutex_lock_killable(&volume_mutex) < 0)
7295 return -EINTR;
7296
7297 rc = volume_get_status_ec(&s);
7298 if (rc)
7299 goto unlock;
7300
7301 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
7302
7303 if (n != s) {
7304 rc = volume_set_status_ec(n);
7305 if (!rc)
7306 rc = 1;
7307 }
7308
7309 unlock:
7310 mutex_unlock(&volume_mutex);
7311 return rc;
7312 }
7313
volume_set_software_mute(bool startup)7314 static int volume_set_software_mute(bool startup)
7315 {
7316 int result;
7317
7318 if (!tpacpi_is_lenovo())
7319 return -ENODEV;
7320
7321 if (startup) {
7322 if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
7323 "HAUM", "qd"))
7324 return -EIO;
7325
7326 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7327 "Initial HAUM setting was %d\n",
7328 software_mute_orig_mode);
7329 }
7330
7331 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
7332 (int)TP_EC_MUTE_BTN_NONE))
7333 return -EIO;
7334
7335 if (result != TP_EC_MUTE_BTN_NONE)
7336 pr_warn("Unexpected SAUM result %d\n",
7337 result);
7338
7339 /*
7340 * In software mute mode, the standard codec controls take
7341 * precendence, so we unmute the ThinkPad HW switch at
7342 * startup. Just on case there are SAUM-capable ThinkPads
7343 * with level controls, set max HW volume as well.
7344 */
7345 if (tp_features.mixer_no_level_control)
7346 result = volume_set_mute(false);
7347 else
7348 result = volume_set_status(TP_EC_VOLUME_MAX);
7349
7350 if (result != 0)
7351 pr_warn("Failed to unmute the HW mute switch\n");
7352
7353 return 0;
7354 }
7355
volume_exit_software_mute(void)7356 static void volume_exit_software_mute(void)
7357 {
7358 int r;
7359
7360 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
7361 || r != software_mute_orig_mode)
7362 pr_warn("Failed to restore mute mode\n");
7363 }
7364
volume_alsa_set_volume(const u8 vol)7365 static int volume_alsa_set_volume(const u8 vol)
7366 {
7367 dbg_printk(TPACPI_DBG_MIXER,
7368 "ALSA: trying to set volume level to %hu\n", vol);
7369 return __volume_set_volume_ec(vol);
7370 }
7371
volume_alsa_notify_change(void)7372 static void volume_alsa_notify_change(void)
7373 {
7374 struct tpacpi_alsa_data *d;
7375
7376 if (alsa_card && alsa_card->private_data) {
7377 d = alsa_card->private_data;
7378 if (d->ctl_mute_id)
7379 snd_ctl_notify(alsa_card,
7380 SNDRV_CTL_EVENT_MASK_VALUE,
7381 d->ctl_mute_id);
7382 if (d->ctl_vol_id)
7383 snd_ctl_notify(alsa_card,
7384 SNDRV_CTL_EVENT_MASK_VALUE,
7385 d->ctl_vol_id);
7386 }
7387 }
7388
volume_alsa_vol_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)7389 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7390 struct snd_ctl_elem_info *uinfo)
7391 {
7392 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7393 uinfo->count = 1;
7394 uinfo->value.integer.min = 0;
7395 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7396 return 0;
7397 }
7398
volume_alsa_vol_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7399 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7400 struct snd_ctl_elem_value *ucontrol)
7401 {
7402 u8 s;
7403 int rc;
7404
7405 rc = volume_get_status(&s);
7406 if (rc < 0)
7407 return rc;
7408
7409 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7410 return 0;
7411 }
7412
volume_alsa_vol_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7413 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7414 struct snd_ctl_elem_value *ucontrol)
7415 {
7416 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7417 ucontrol->value.integer.value[0]);
7418 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7419 }
7420
7421 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7422
volume_alsa_mute_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7423 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7424 struct snd_ctl_elem_value *ucontrol)
7425 {
7426 u8 s;
7427 int rc;
7428
7429 rc = volume_get_status(&s);
7430 if (rc < 0)
7431 return rc;
7432
7433 ucontrol->value.integer.value[0] =
7434 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7435 return 0;
7436 }
7437
volume_alsa_mute_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7438 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7439 struct snd_ctl_elem_value *ucontrol)
7440 {
7441 tpacpi_disclose_usertask("ALSA", "%smute\n",
7442 ucontrol->value.integer.value[0] ?
7443 "un" : "");
7444 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7445 }
7446
7447 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7448 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7449 .name = "Console Playback Volume",
7450 .index = 0,
7451 .access = SNDRV_CTL_ELEM_ACCESS_READ,
7452 .info = volume_alsa_vol_info,
7453 .get = volume_alsa_vol_get,
7454 };
7455
7456 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7457 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7458 .name = "Console Playback Switch",
7459 .index = 0,
7460 .access = SNDRV_CTL_ELEM_ACCESS_READ,
7461 .info = volume_alsa_mute_info,
7462 .get = volume_alsa_mute_get,
7463 };
7464
volume_suspend(void)7465 static void volume_suspend(void)
7466 {
7467 tpacpi_volume_checkpoint_nvram();
7468 }
7469
volume_resume(void)7470 static void volume_resume(void)
7471 {
7472 if (software_mute_active) {
7473 if (volume_set_software_mute(false) < 0)
7474 pr_warn("Failed to restore software mute\n");
7475 } else {
7476 volume_alsa_notify_change();
7477 }
7478 }
7479
volume_shutdown(void)7480 static void volume_shutdown(void)
7481 {
7482 tpacpi_volume_checkpoint_nvram();
7483 }
7484
volume_exit(void)7485 static void volume_exit(void)
7486 {
7487 if (alsa_card) {
7488 snd_card_free(alsa_card);
7489 alsa_card = NULL;
7490 }
7491
7492 tpacpi_volume_checkpoint_nvram();
7493
7494 if (software_mute_active)
7495 volume_exit_software_mute();
7496 }
7497
volume_create_alsa_mixer(void)7498 static int __init volume_create_alsa_mixer(void)
7499 {
7500 struct snd_card *card;
7501 struct tpacpi_alsa_data *data;
7502 struct snd_kcontrol *ctl_vol;
7503 struct snd_kcontrol *ctl_mute;
7504 int rc;
7505
7506 rc = snd_card_new(&tpacpi_pdev->dev,
7507 alsa_index, alsa_id, THIS_MODULE,
7508 sizeof(struct tpacpi_alsa_data), &card);
7509 if (rc < 0 || !card) {
7510 pr_err("Failed to create ALSA card structures: %d\n", rc);
7511 return -ENODEV;
7512 }
7513
7514 BUG_ON(!card->private_data);
7515 data = card->private_data;
7516 data->card = card;
7517
7518 strscpy(card->driver, TPACPI_ALSA_DRVNAME,
7519 sizeof(card->driver));
7520 strscpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7521 sizeof(card->shortname));
7522 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7523 (thinkpad_id.ec_version_str) ?
7524 thinkpad_id.ec_version_str : "(unknown)");
7525 snprintf(card->longname, sizeof(card->longname),
7526 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7527 (thinkpad_id.ec_version_str) ?
7528 thinkpad_id.ec_version_str : "unknown");
7529
7530 if (volume_control_allowed) {
7531 volume_alsa_control_vol.put = volume_alsa_vol_put;
7532 volume_alsa_control_vol.access =
7533 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7534
7535 volume_alsa_control_mute.put = volume_alsa_mute_put;
7536 volume_alsa_control_mute.access =
7537 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7538 }
7539
7540 if (!tp_features.mixer_no_level_control) {
7541 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7542 rc = snd_ctl_add(card, ctl_vol);
7543 if (rc < 0) {
7544 pr_err("Failed to create ALSA volume control: %d\n",
7545 rc);
7546 goto err_exit;
7547 }
7548 data->ctl_vol_id = &ctl_vol->id;
7549 }
7550
7551 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7552 rc = snd_ctl_add(card, ctl_mute);
7553 if (rc < 0) {
7554 pr_err("Failed to create ALSA mute control: %d\n", rc);
7555 goto err_exit;
7556 }
7557 data->ctl_mute_id = &ctl_mute->id;
7558
7559 rc = snd_card_register(card);
7560 if (rc < 0) {
7561 pr_err("Failed to register ALSA card: %d\n", rc);
7562 goto err_exit;
7563 }
7564
7565 alsa_card = card;
7566 return 0;
7567
7568 err_exit:
7569 snd_card_free(card);
7570 return -ENODEV;
7571 }
7572
7573 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
7574 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
7575
7576 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7577 /* Whitelist volume level on all IBM by default */
7578 { .vendor = PCI_VENDOR_ID_IBM,
7579 .bios = TPACPI_MATCH_ANY,
7580 .ec = TPACPI_MATCH_ANY,
7581 .quirks = TPACPI_VOL_Q_LEVEL },
7582
7583 /* Lenovo models with volume control (needs confirmation) */
7584 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7585 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7586 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7587 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7588 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7589 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7590 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7591
7592 /* Whitelist mute-only on all Lenovo by default */
7593 { .vendor = PCI_VENDOR_ID_LENOVO,
7594 .bios = TPACPI_MATCH_ANY,
7595 .ec = TPACPI_MATCH_ANY,
7596 .quirks = TPACPI_VOL_Q_MUTEONLY }
7597 };
7598
volume_init(struct ibm_init_struct * iibm)7599 static int __init volume_init(struct ibm_init_struct *iibm)
7600 {
7601 unsigned long quirks;
7602 int rc;
7603
7604 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7605
7606 mutex_init(&volume_mutex);
7607
7608 /*
7609 * Check for module parameter bogosity, note that we
7610 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7611 * able to detect "unspecified"
7612 */
7613 if (volume_mode > TPACPI_VOL_MODE_MAX)
7614 return -EINVAL;
7615
7616 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7617 pr_err("UCMS step volume mode not implemented, please contact %s\n",
7618 TPACPI_MAIL);
7619 return -ENODEV;
7620 }
7621
7622 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7623 return -EINVAL;
7624
7625 /*
7626 * The ALSA mixer is our primary interface.
7627 * When disabled, don't install the subdriver at all
7628 */
7629 if (!alsa_enable) {
7630 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7631 "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
7632 return -ENODEV;
7633 }
7634
7635 quirks = tpacpi_check_quirks(volume_quirk_table,
7636 ARRAY_SIZE(volume_quirk_table));
7637
7638 switch (volume_capabilities) {
7639 case TPACPI_VOL_CAP_AUTO:
7640 if (quirks & TPACPI_VOL_Q_MUTEONLY)
7641 tp_features.mixer_no_level_control = 1;
7642 else if (quirks & TPACPI_VOL_Q_LEVEL)
7643 tp_features.mixer_no_level_control = 0;
7644 else
7645 return -ENODEV; /* no mixer */
7646 break;
7647 case TPACPI_VOL_CAP_VOLMUTE:
7648 tp_features.mixer_no_level_control = 0;
7649 break;
7650 case TPACPI_VOL_CAP_MUTEONLY:
7651 tp_features.mixer_no_level_control = 1;
7652 break;
7653 default:
7654 return -ENODEV;
7655 }
7656
7657 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7658 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7659 "using user-supplied volume_capabilities=%d\n",
7660 volume_capabilities);
7661
7662 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7663 volume_mode == TPACPI_VOL_MODE_MAX) {
7664 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7665
7666 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7667 "driver auto-selected volume_mode=%d\n",
7668 volume_mode);
7669 } else {
7670 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7671 "using user-supplied volume_mode=%d\n",
7672 volume_mode);
7673 }
7674
7675 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7676 "mute is supported, volume control is %s\n",
7677 str_supported(!tp_features.mixer_no_level_control));
7678
7679 if (software_mute_requested && volume_set_software_mute(true) == 0) {
7680 software_mute_active = true;
7681 } else {
7682 rc = volume_create_alsa_mixer();
7683 if (rc) {
7684 pr_err("Could not create the ALSA mixer interface\n");
7685 return rc;
7686 }
7687
7688 pr_info("Console audio control enabled, mode: %s\n",
7689 (volume_control_allowed) ?
7690 "override (read/write)" :
7691 "monitor (read only)");
7692 }
7693
7694 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7695 "registering volume hotkeys as change notification\n");
7696 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7697 | TP_ACPI_HKEY_VOLUP_MASK
7698 | TP_ACPI_HKEY_VOLDWN_MASK
7699 | TP_ACPI_HKEY_MUTE_MASK);
7700
7701 return 0;
7702 }
7703
volume_read(struct seq_file * m)7704 static int volume_read(struct seq_file *m)
7705 {
7706 u8 status;
7707
7708 if (volume_get_status(&status) < 0) {
7709 seq_printf(m, "level:\t\tunreadable\n");
7710 } else {
7711 if (tp_features.mixer_no_level_control)
7712 seq_printf(m, "level:\t\tunsupported\n");
7713 else
7714 seq_printf(m, "level:\t\t%d\n",
7715 status & TP_EC_AUDIO_LVL_MSK);
7716
7717 seq_printf(m, "mute:\t\t%s\n", str_on_off(status & BIT(TP_EC_AUDIO_MUTESW)));
7718
7719 if (volume_control_allowed) {
7720 seq_printf(m, "commands:\tunmute, mute\n");
7721 if (!tp_features.mixer_no_level_control) {
7722 seq_printf(m, "commands:\tup, down\n");
7723 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7724 TP_EC_VOLUME_MAX);
7725 }
7726 }
7727 }
7728
7729 return 0;
7730 }
7731
volume_write(char * buf)7732 static int volume_write(char *buf)
7733 {
7734 u8 s;
7735 u8 new_level, new_mute;
7736 int l;
7737 char *cmd;
7738 int rc;
7739
7740 /*
7741 * We do allow volume control at driver startup, so that the
7742 * user can set initial state through the volume=... parameter hack.
7743 */
7744 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7745 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7746 tp_warned.volume_ctrl_forbidden = 1;
7747 pr_notice("Console audio control in monitor mode, changes are not allowed\n");
7748 pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
7749 }
7750 return -EPERM;
7751 }
7752
7753 rc = volume_get_status(&s);
7754 if (rc < 0)
7755 return rc;
7756
7757 new_level = s & TP_EC_AUDIO_LVL_MSK;
7758 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7759
7760 while ((cmd = strsep(&buf, ","))) {
7761 if (!tp_features.mixer_no_level_control) {
7762 if (strstarts(cmd, "up")) {
7763 if (new_mute)
7764 new_mute = 0;
7765 else if (new_level < TP_EC_VOLUME_MAX)
7766 new_level++;
7767 continue;
7768 } else if (strstarts(cmd, "down")) {
7769 if (new_mute)
7770 new_mute = 0;
7771 else if (new_level > 0)
7772 new_level--;
7773 continue;
7774 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7775 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7776 new_level = l;
7777 continue;
7778 }
7779 }
7780 if (strstarts(cmd, "mute"))
7781 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7782 else if (strstarts(cmd, "unmute"))
7783 new_mute = 0;
7784 else
7785 return -EINVAL;
7786 }
7787
7788 if (tp_features.mixer_no_level_control) {
7789 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7790 new_mute ? "" : "un");
7791 rc = volume_set_mute(!!new_mute);
7792 } else {
7793 tpacpi_disclose_usertask("procfs volume",
7794 "%smute and set level to %d\n",
7795 new_mute ? "" : "un", new_level);
7796 rc = volume_set_status(new_mute | new_level);
7797 }
7798 volume_alsa_notify_change();
7799
7800 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7801 }
7802
7803 static struct ibm_struct volume_driver_data = {
7804 .name = "volume",
7805 .read = volume_read,
7806 .write = volume_write,
7807 .exit = volume_exit,
7808 .suspend = volume_suspend,
7809 .resume = volume_resume,
7810 .shutdown = volume_shutdown,
7811 };
7812
7813 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7814
7815 #define alsa_card NULL
7816
volume_alsa_notify_change(void)7817 static inline void volume_alsa_notify_change(void)
7818 {
7819 }
7820
volume_init(struct ibm_init_struct * iibm)7821 static int __init volume_init(struct ibm_init_struct *iibm)
7822 {
7823 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7824
7825 return -ENODEV;
7826 }
7827
7828 static struct ibm_struct volume_driver_data = {
7829 .name = "volume",
7830 };
7831
7832 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7833
7834 /*************************************************************************
7835 * Fan subdriver
7836 */
7837
7838 /*
7839 * FAN ACCESS MODES
7840 *
7841 * TPACPI_FAN_RD_ACPI_GFAN:
7842 * ACPI GFAN method: returns fan level
7843 *
7844 * see TPACPI_FAN_WR_ACPI_SFAN
7845 * EC 0x2f (HFSP) not available if GFAN exists
7846 *
7847 * TPACPI_FAN_WR_ACPI_SFAN:
7848 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7849 *
7850 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7851 * it for writing.
7852 *
7853 * TPACPI_FAN_WR_TPEC:
7854 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7855 * Supported on almost all ThinkPads
7856 *
7857 * Fan speed changes of any sort (including those caused by the
7858 * disengaged mode) are usually done slowly by the firmware as the
7859 * maximum amount of fan duty cycle change per second seems to be
7860 * limited.
7861 *
7862 * Reading is not available if GFAN exists.
7863 * Writing is not available if SFAN exists.
7864 *
7865 * Bits
7866 * 7 automatic mode engaged;
7867 * (default operation mode of the ThinkPad)
7868 * fan level is ignored in this mode.
7869 * 6 full speed mode (takes precedence over bit 7);
7870 * not available on all thinkpads. May disable
7871 * the tachometer while the fan controller ramps up
7872 * the speed (which can take up to a few *minutes*).
7873 * Speeds up fan to 100% duty-cycle, which is far above
7874 * the standard RPM levels. It is not impossible that
7875 * it could cause hardware damage.
7876 * 5-3 unused in some models. Extra bits for fan level
7877 * in others, but still useless as all values above
7878 * 7 map to the same speed as level 7 in these models.
7879 * 2-0 fan level (0..7 usually)
7880 * 0x00 = stop
7881 * 0x07 = max (set when temperatures critical)
7882 * Some ThinkPads may have other levels, see
7883 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7884 *
7885 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7886 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7887 * does so, its initial value is meaningless (0x07).
7888 *
7889 * For firmware bugs, refer to:
7890 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7891 *
7892 * ----
7893 *
7894 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7895 * Main fan tachometer reading (in RPM)
7896 *
7897 * This register is present on all ThinkPads with a new-style EC, and
7898 * it is known not to be present on the A21m/e, and T22, as there is
7899 * something else in offset 0x84 according to the ACPI DSDT. Other
7900 * ThinkPads from this same time period (and earlier) probably lack the
7901 * tachometer as well.
7902 *
7903 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7904 * was never fixed by IBM to report the EC firmware version string
7905 * probably support the tachometer (like the early X models), so
7906 * detecting it is quite hard. We need more data to know for sure.
7907 *
7908 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7909 * might result.
7910 *
7911 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7912 * mode.
7913 *
7914 * For firmware bugs, refer to:
7915 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7916 *
7917 * ----
7918 *
7919 * ThinkPad EC register 0x31 bit 0 (only on select models)
7920 *
7921 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7922 * show the speed of the main fan. When bit 0 of EC register 0x31
7923 * is one, the tachometer registers show the speed of the auxiliary
7924 * fan.
7925 *
7926 * Fan control seems to affect both fans, regardless of the state
7927 * of this bit.
7928 *
7929 * So far, only the firmware for the X60/X61 non-tablet versions
7930 * seem to support this (firmware TP-7M).
7931 *
7932 * TPACPI_FAN_WR_ACPI_FANS:
7933 * ThinkPad X31, X40, X41. Not available in the X60.
7934 *
7935 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7936 * high speed. ACPI DSDT seems to map these three speeds to levels
7937 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7938 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7939 *
7940 * The speeds are stored on handles
7941 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7942 *
7943 * There are three default speed sets, accessible as handles:
7944 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7945 *
7946 * ACPI DSDT switches which set is in use depending on various
7947 * factors.
7948 *
7949 * TPACPI_FAN_WR_TPEC is also available and should be used to
7950 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7951 * but the ACPI tables just mention level 7.
7952 *
7953 * TPACPI_FAN_RD_TPEC_NS:
7954 * This mode is used for a few ThinkPads (L13 Yoga Gen2, X13 Yoga Gen2 etc.)
7955 * that are using non-standard EC locations for reporting fan speeds.
7956 * Currently these platforms only provide fan rpm reporting.
7957 *
7958 */
7959
7960 #define FAN_RPM_CAL_CONST 491520 /* FAN RPM calculation offset for some non-standard ECFW */
7961
7962 #define FAN_NS_CTRL_STATUS BIT(2) /* Bit which determines control is enabled or not */
7963 #define FAN_NS_CTRL BIT(4) /* Bit which determines control is by host or EC */
7964
7965 enum { /* Fan control constants */
7966 fan_status_offset = 0x2f, /* EC register 0x2f */
7967 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7968 * 0x84 must be read before 0x85 */
7969 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7970 bit 0 selects which fan is active */
7971
7972 fan_status_offset_ns = 0x93, /* Special status/control offset for non-standard EC Fan1 */
7973 fan2_status_offset_ns = 0x96, /* Special status/control offset for non-standard EC Fan2 */
7974 fan_rpm_status_ns = 0x95, /* Special offset for Fan1 RPM status for non-standard EC */
7975 fan2_rpm_status_ns = 0x98, /* Special offset for Fan2 RPM status for non-standard EC */
7976
7977 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7978 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7979
7980 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7981 };
7982
7983 enum fan_status_access_mode {
7984 TPACPI_FAN_NONE = 0, /* No fan status or control */
7985 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7986 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7987 TPACPI_FAN_RD_TPEC_NS, /* Use non-standard ACPI EC regs (eg: L13 Yoga gen2 etc.) */
7988 };
7989
7990 enum fan_control_access_mode {
7991 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7992 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7993 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7994 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7995 };
7996
7997 enum fan_control_commands {
7998 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7999 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
8000 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
8001 * and also watchdog cmd */
8002 };
8003
8004 static bool fan_control_allowed;
8005
8006 static enum fan_status_access_mode fan_status_access_mode;
8007 static enum fan_control_access_mode fan_control_access_mode;
8008 static enum fan_control_commands fan_control_commands;
8009
8010 static u8 fan_control_initial_status;
8011 static u8 fan_control_desired_level;
8012 static u8 fan_control_resume_level;
8013 static int fan_watchdog_maxinterval;
8014
8015 static bool fan_with_ns_addr;
8016 static bool ecfw_with_fan_dec_rpm;
8017
8018 static struct mutex fan_mutex;
8019
8020 static void fan_watchdog_fire(struct work_struct *ignored);
8021 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
8022
8023 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
8024 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
8025 "\\FSPD", /* 600e/x, 770e, 770x */
8026 ); /* all others */
8027 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
8028 "JFNS", /* 770x-JL */
8029 ); /* all others */
8030
8031 /*
8032 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
8033 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
8034 * be in auto mode (0x80).
8035 *
8036 * This is corrected by any write to HFSP either by the driver, or
8037 * by the firmware.
8038 *
8039 * We assume 0x07 really means auto mode while this quirk is active,
8040 * as this is far more likely than the ThinkPad being in level 7,
8041 * which is only used by the firmware during thermal emergencies.
8042 *
8043 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
8044 * TP-70 (T43, R52), which are known to be buggy.
8045 */
8046
fan_quirk1_setup(void)8047 static void fan_quirk1_setup(void)
8048 {
8049 if (fan_control_initial_status == 0x07) {
8050 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
8051 tp_features.fan_ctrl_status_undef = 1;
8052 }
8053 }
8054
fan_quirk1_handle(u8 * fan_status)8055 static void fan_quirk1_handle(u8 *fan_status)
8056 {
8057 if (unlikely(tp_features.fan_ctrl_status_undef)) {
8058 if (*fan_status != fan_control_initial_status) {
8059 /* something changed the HFSP regisnter since
8060 * driver init time, so it is not undefined
8061 * anymore */
8062 tp_features.fan_ctrl_status_undef = 0;
8063 } else {
8064 /* Return most likely status. In fact, it
8065 * might be the only possible status */
8066 *fan_status = TP_EC_FAN_AUTO;
8067 }
8068 }
8069 }
8070
8071 /* Select main fan on X60/X61, NOOP on others */
fan_select_fan1(void)8072 static bool fan_select_fan1(void)
8073 {
8074 if (tp_features.second_fan) {
8075 u8 val;
8076
8077 if (ec_read(fan_select_offset, &val) < 0)
8078 return false;
8079 val &= 0xFEU;
8080 if (ec_write(fan_select_offset, val) < 0)
8081 return false;
8082 }
8083 return true;
8084 }
8085
8086 /* Select secondary fan on X60/X61 */
fan_select_fan2(void)8087 static bool fan_select_fan2(void)
8088 {
8089 u8 val;
8090
8091 if (!tp_features.second_fan)
8092 return false;
8093
8094 if (ec_read(fan_select_offset, &val) < 0)
8095 return false;
8096 val |= 0x01U;
8097 if (ec_write(fan_select_offset, val) < 0)
8098 return false;
8099
8100 return true;
8101 }
8102
fan_update_desired_level(u8 status)8103 static void fan_update_desired_level(u8 status)
8104 {
8105 lockdep_assert_held(&fan_mutex);
8106
8107 if ((status &
8108 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8109 if (status > 7)
8110 fan_control_desired_level = 7;
8111 else
8112 fan_control_desired_level = status;
8113 }
8114 }
8115
fan_get_status(u8 * status)8116 static int fan_get_status(u8 *status)
8117 {
8118 u8 s;
8119
8120 /* TODO:
8121 * Add TPACPI_FAN_RD_ACPI_FANS ? */
8122
8123 switch (fan_status_access_mode) {
8124 case TPACPI_FAN_RD_ACPI_GFAN: {
8125 /* 570, 600e/x, 770e, 770x */
8126 int res;
8127
8128 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
8129 return -EIO;
8130
8131 if (likely(status))
8132 *status = res & 0x07;
8133
8134 break;
8135 }
8136 case TPACPI_FAN_RD_TPEC:
8137 /* all except 570, 600e/x, 770e, 770x */
8138 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
8139 return -EIO;
8140
8141 if (likely(status)) {
8142 *status = s;
8143 fan_quirk1_handle(status);
8144 }
8145
8146 break;
8147 case TPACPI_FAN_RD_TPEC_NS:
8148 /* Default mode is AUTO which means controlled by EC */
8149 if (!acpi_ec_read(fan_status_offset_ns, &s))
8150 return -EIO;
8151
8152 if (status)
8153 *status = s;
8154
8155 break;
8156
8157 default:
8158 return -ENXIO;
8159 }
8160
8161 return 0;
8162 }
8163
fan_get_status_safe(u8 * status)8164 static int fan_get_status_safe(u8 *status)
8165 {
8166 int rc;
8167 u8 s;
8168
8169 if (mutex_lock_killable(&fan_mutex))
8170 return -ERESTARTSYS;
8171 rc = fan_get_status(&s);
8172 /* NS EC doesn't have register with level settings */
8173 if (!rc && !fan_with_ns_addr)
8174 fan_update_desired_level(s);
8175 mutex_unlock(&fan_mutex);
8176
8177 if (rc)
8178 return rc;
8179 if (status)
8180 *status = s;
8181
8182 return 0;
8183 }
8184
fan_get_speed(unsigned int * speed)8185 static int fan_get_speed(unsigned int *speed)
8186 {
8187 u8 hi, lo;
8188
8189 switch (fan_status_access_mode) {
8190 case TPACPI_FAN_RD_TPEC:
8191 /* all except 570, 600e/x, 770e, 770x */
8192 if (unlikely(!fan_select_fan1()))
8193 return -EIO;
8194 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
8195 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
8196 return -EIO;
8197
8198 if (likely(speed))
8199 *speed = (hi << 8) | lo;
8200 break;
8201 case TPACPI_FAN_RD_TPEC_NS:
8202 if (!acpi_ec_read(fan_rpm_status_ns, &lo))
8203 return -EIO;
8204
8205 if (speed)
8206 *speed = lo ? FAN_RPM_CAL_CONST / lo : 0;
8207 break;
8208
8209 default:
8210 return -ENXIO;
8211 }
8212
8213 return 0;
8214 }
8215
fan2_get_speed(unsigned int * speed)8216 static int fan2_get_speed(unsigned int *speed)
8217 {
8218 u8 hi, lo, status;
8219 bool rc;
8220
8221 switch (fan_status_access_mode) {
8222 case TPACPI_FAN_RD_TPEC:
8223 /* all except 570, 600e/x, 770e, 770x */
8224 if (unlikely(!fan_select_fan2()))
8225 return -EIO;
8226 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8227 !acpi_ec_read(fan_rpm_offset + 1, &hi);
8228 fan_select_fan1(); /* play it safe */
8229 if (rc)
8230 return -EIO;
8231
8232 if (likely(speed))
8233 *speed = (hi << 8) | lo;
8234 break;
8235
8236 case TPACPI_FAN_RD_TPEC_NS:
8237 rc = !acpi_ec_read(fan2_status_offset_ns, &status);
8238 if (rc)
8239 return -EIO;
8240 if (!(status & FAN_NS_CTRL_STATUS)) {
8241 pr_info("secondary fan control not supported\n");
8242 return -EIO;
8243 }
8244 rc = !acpi_ec_read(fan2_rpm_status_ns, &lo);
8245 if (rc)
8246 return -EIO;
8247 if (speed)
8248 *speed = lo ? FAN_RPM_CAL_CONST / lo : 0;
8249 break;
8250
8251 default:
8252 return -ENXIO;
8253 }
8254
8255 return 0;
8256 }
8257
fan_set_level(int level)8258 static int fan_set_level(int level)
8259 {
8260 if (!fan_control_allowed)
8261 return -EPERM;
8262
8263 switch (fan_control_access_mode) {
8264 case TPACPI_FAN_WR_ACPI_SFAN:
8265 if ((level < 0) || (level > 7))
8266 return -EINVAL;
8267
8268 if (tp_features.second_fan_ctl) {
8269 if (!fan_select_fan2() ||
8270 !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) {
8271 pr_warn("Couldn't set 2nd fan level, disabling support\n");
8272 tp_features.second_fan_ctl = 0;
8273 }
8274 fan_select_fan1();
8275 }
8276 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8277 return -EIO;
8278 break;
8279
8280 case TPACPI_FAN_WR_ACPI_FANS:
8281 case TPACPI_FAN_WR_TPEC:
8282 if (!(level & TP_EC_FAN_AUTO) &&
8283 !(level & TP_EC_FAN_FULLSPEED) &&
8284 ((level < 0) || (level > 7)))
8285 return -EINVAL;
8286
8287 /* safety net should the EC not support AUTO
8288 * or FULLSPEED mode bits and just ignore them */
8289 if (level & TP_EC_FAN_FULLSPEED)
8290 level |= 7; /* safety min speed 7 */
8291 else if (level & TP_EC_FAN_AUTO)
8292 level |= 4; /* safety min speed 4 */
8293
8294 if (tp_features.second_fan_ctl) {
8295 if (!fan_select_fan2() ||
8296 !acpi_ec_write(fan_status_offset, level)) {
8297 pr_warn("Couldn't set 2nd fan level, disabling support\n");
8298 tp_features.second_fan_ctl = 0;
8299 }
8300 fan_select_fan1();
8301
8302 }
8303 if (!acpi_ec_write(fan_status_offset, level))
8304 return -EIO;
8305 else
8306 tp_features.fan_ctrl_status_undef = 0;
8307 break;
8308
8309 default:
8310 return -ENXIO;
8311 }
8312
8313 vdbg_printk(TPACPI_DBG_FAN,
8314 "fan control: set fan control register to 0x%02x\n", level);
8315 return 0;
8316 }
8317
fan_set_level_safe(int level)8318 static int fan_set_level_safe(int level)
8319 {
8320 int rc;
8321
8322 if (!fan_control_allowed)
8323 return -EPERM;
8324
8325 if (mutex_lock_killable(&fan_mutex))
8326 return -ERESTARTSYS;
8327
8328 if (level == TPACPI_FAN_LAST_LEVEL)
8329 level = fan_control_desired_level;
8330
8331 rc = fan_set_level(level);
8332 if (!rc)
8333 fan_update_desired_level(level);
8334
8335 mutex_unlock(&fan_mutex);
8336 return rc;
8337 }
8338
fan_set_enable(void)8339 static int fan_set_enable(void)
8340 {
8341 u8 s;
8342 int rc;
8343
8344 if (!fan_control_allowed)
8345 return -EPERM;
8346
8347 if (mutex_lock_killable(&fan_mutex))
8348 return -ERESTARTSYS;
8349
8350 switch (fan_control_access_mode) {
8351 case TPACPI_FAN_WR_ACPI_FANS:
8352 case TPACPI_FAN_WR_TPEC:
8353 rc = fan_get_status(&s);
8354 if (rc)
8355 break;
8356
8357 /* Don't go out of emergency fan mode */
8358 if (s != 7) {
8359 s &= 0x07;
8360 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8361 }
8362
8363 if (!acpi_ec_write(fan_status_offset, s))
8364 rc = -EIO;
8365 else {
8366 tp_features.fan_ctrl_status_undef = 0;
8367 rc = 0;
8368 }
8369 break;
8370
8371 case TPACPI_FAN_WR_ACPI_SFAN:
8372 rc = fan_get_status(&s);
8373 if (rc)
8374 break;
8375
8376 s &= 0x07;
8377
8378 /* Set fan to at least level 4 */
8379 s |= 4;
8380
8381 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8382 rc = -EIO;
8383 else
8384 rc = 0;
8385 break;
8386
8387 default:
8388 rc = -ENXIO;
8389 }
8390
8391 mutex_unlock(&fan_mutex);
8392
8393 if (!rc)
8394 vdbg_printk(TPACPI_DBG_FAN,
8395 "fan control: set fan control register to 0x%02x\n",
8396 s);
8397 return rc;
8398 }
8399
fan_set_disable(void)8400 static int fan_set_disable(void)
8401 {
8402 int rc;
8403
8404 if (!fan_control_allowed)
8405 return -EPERM;
8406
8407 if (mutex_lock_killable(&fan_mutex))
8408 return -ERESTARTSYS;
8409
8410 rc = 0;
8411 switch (fan_control_access_mode) {
8412 case TPACPI_FAN_WR_ACPI_FANS:
8413 case TPACPI_FAN_WR_TPEC:
8414 if (!acpi_ec_write(fan_status_offset, 0x00))
8415 rc = -EIO;
8416 else {
8417 fan_control_desired_level = 0;
8418 tp_features.fan_ctrl_status_undef = 0;
8419 }
8420 break;
8421
8422 case TPACPI_FAN_WR_ACPI_SFAN:
8423 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8424 rc = -EIO;
8425 else
8426 fan_control_desired_level = 0;
8427 break;
8428
8429 default:
8430 rc = -ENXIO;
8431 }
8432
8433 if (!rc)
8434 vdbg_printk(TPACPI_DBG_FAN,
8435 "fan control: set fan control register to 0\n");
8436
8437 mutex_unlock(&fan_mutex);
8438 return rc;
8439 }
8440
fan_set_speed(int speed)8441 static int fan_set_speed(int speed)
8442 {
8443 int rc;
8444
8445 if (!fan_control_allowed)
8446 return -EPERM;
8447
8448 if (mutex_lock_killable(&fan_mutex))
8449 return -ERESTARTSYS;
8450
8451 rc = 0;
8452 switch (fan_control_access_mode) {
8453 case TPACPI_FAN_WR_ACPI_FANS:
8454 if (speed >= 0 && speed <= 65535) {
8455 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8456 speed, speed, speed))
8457 rc = -EIO;
8458 } else
8459 rc = -EINVAL;
8460 break;
8461
8462 default:
8463 rc = -ENXIO;
8464 }
8465
8466 mutex_unlock(&fan_mutex);
8467 return rc;
8468 }
8469
fan_watchdog_reset(void)8470 static void fan_watchdog_reset(void)
8471 {
8472 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8473 return;
8474
8475 if (fan_watchdog_maxinterval > 0 &&
8476 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8477 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8478 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8479 else
8480 cancel_delayed_work(&fan_watchdog_task);
8481 }
8482
fan_watchdog_fire(struct work_struct * ignored)8483 static void fan_watchdog_fire(struct work_struct *ignored)
8484 {
8485 int rc;
8486
8487 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8488 return;
8489
8490 pr_notice("fan watchdog: enabling fan\n");
8491 rc = fan_set_enable();
8492 if (rc < 0) {
8493 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
8494 rc);
8495 /* reschedule for later */
8496 fan_watchdog_reset();
8497 }
8498 }
8499
8500 /*
8501 * SYSFS fan layout: hwmon compatible (device)
8502 *
8503 * pwm*_enable:
8504 * 0: "disengaged" mode
8505 * 1: manual mode
8506 * 2: native EC "auto" mode (recommended, hardware default)
8507 *
8508 * pwm*: set speed in manual mode, ignored otherwise.
8509 * 0 is level 0; 255 is level 7. Intermediate points done with linear
8510 * interpolation.
8511 *
8512 * fan*_input: tachometer reading, RPM
8513 *
8514 *
8515 * SYSFS fan layout: extensions
8516 *
8517 * fan_watchdog (driver):
8518 * fan watchdog interval in seconds, 0 disables (default), max 120
8519 */
8520
8521 /* sysfs fan pwm1_enable ----------------------------------------------- */
fan_pwm1_enable_show(struct device * dev,struct device_attribute * attr,char * buf)8522 static ssize_t fan_pwm1_enable_show(struct device *dev,
8523 struct device_attribute *attr,
8524 char *buf)
8525 {
8526 int res, mode;
8527 u8 status;
8528
8529 res = fan_get_status_safe(&status);
8530 if (res)
8531 return res;
8532
8533 if (status & TP_EC_FAN_FULLSPEED) {
8534 mode = 0;
8535 } else if (status & TP_EC_FAN_AUTO) {
8536 mode = 2;
8537 } else
8538 mode = 1;
8539
8540 return sysfs_emit(buf, "%d\n", mode);
8541 }
8542
fan_pwm1_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)8543 static ssize_t fan_pwm1_enable_store(struct device *dev,
8544 struct device_attribute *attr,
8545 const char *buf, size_t count)
8546 {
8547 unsigned long t;
8548 int res, level;
8549
8550 if (parse_strtoul(buf, 2, &t))
8551 return -EINVAL;
8552
8553 tpacpi_disclose_usertask("hwmon pwm1_enable",
8554 "set fan mode to %lu\n", t);
8555
8556 switch (t) {
8557 case 0:
8558 level = TP_EC_FAN_FULLSPEED;
8559 break;
8560 case 1:
8561 level = TPACPI_FAN_LAST_LEVEL;
8562 break;
8563 case 2:
8564 level = TP_EC_FAN_AUTO;
8565 break;
8566 case 3:
8567 /* reserved for software-controlled auto mode */
8568 return -ENOSYS;
8569 default:
8570 return -EINVAL;
8571 }
8572
8573 res = fan_set_level_safe(level);
8574 if (res == -ENXIO)
8575 return -EINVAL;
8576 else if (res < 0)
8577 return res;
8578
8579 fan_watchdog_reset();
8580
8581 return count;
8582 }
8583
8584 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8585 fan_pwm1_enable_show, fan_pwm1_enable_store);
8586
8587 /* sysfs fan pwm1 ------------------------------------------------------ */
fan_pwm1_show(struct device * dev,struct device_attribute * attr,char * buf)8588 static ssize_t fan_pwm1_show(struct device *dev,
8589 struct device_attribute *attr,
8590 char *buf)
8591 {
8592 int res;
8593 u8 status;
8594
8595 res = fan_get_status_safe(&status);
8596 if (res)
8597 return res;
8598
8599 if ((status &
8600 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8601 status = fan_control_desired_level;
8602
8603 if (status > 7)
8604 status = 7;
8605
8606 return sysfs_emit(buf, "%u\n", (status * 255) / 7);
8607 }
8608
fan_pwm1_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)8609 static ssize_t fan_pwm1_store(struct device *dev,
8610 struct device_attribute *attr,
8611 const char *buf, size_t count)
8612 {
8613 unsigned long s;
8614 int rc;
8615 u8 status, newlevel;
8616
8617 if (parse_strtoul(buf, 255, &s))
8618 return -EINVAL;
8619
8620 tpacpi_disclose_usertask("hwmon pwm1",
8621 "set fan speed to %lu\n", s);
8622
8623 /* scale down from 0-255 to 0-7 */
8624 newlevel = (s >> 5) & 0x07;
8625
8626 if (mutex_lock_killable(&fan_mutex))
8627 return -ERESTARTSYS;
8628
8629 rc = fan_get_status(&status);
8630 if (!rc && (status &
8631 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8632 rc = fan_set_level(newlevel);
8633 if (rc == -ENXIO)
8634 rc = -EINVAL;
8635 else if (!rc) {
8636 fan_update_desired_level(newlevel);
8637 fan_watchdog_reset();
8638 }
8639 }
8640
8641 mutex_unlock(&fan_mutex);
8642 return (rc) ? rc : count;
8643 }
8644
8645 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8646
8647 /* sysfs fan fan1_input ------------------------------------------------ */
fan_fan1_input_show(struct device * dev,struct device_attribute * attr,char * buf)8648 static ssize_t fan_fan1_input_show(struct device *dev,
8649 struct device_attribute *attr,
8650 char *buf)
8651 {
8652 int res;
8653 unsigned int speed;
8654
8655 res = fan_get_speed(&speed);
8656 if (res < 0)
8657 return res;
8658
8659 /* Check for fan speeds displayed in hexadecimal */
8660 if (!ecfw_with_fan_dec_rpm)
8661 return sysfs_emit(buf, "%u\n", speed);
8662 else
8663 return sysfs_emit(buf, "%x\n", speed);
8664 }
8665
8666 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8667
8668 /* sysfs fan fan2_input ------------------------------------------------ */
fan_fan2_input_show(struct device * dev,struct device_attribute * attr,char * buf)8669 static ssize_t fan_fan2_input_show(struct device *dev,
8670 struct device_attribute *attr,
8671 char *buf)
8672 {
8673 int res;
8674 unsigned int speed;
8675
8676 res = fan2_get_speed(&speed);
8677 if (res < 0)
8678 return res;
8679
8680 /* Check for fan speeds displayed in hexadecimal */
8681 if (!ecfw_with_fan_dec_rpm)
8682 return sysfs_emit(buf, "%u\n", speed);
8683 else
8684 return sysfs_emit(buf, "%x\n", speed);
8685 }
8686
8687 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8688
8689 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
fan_watchdog_show(struct device_driver * drv,char * buf)8690 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
8691 {
8692 return sysfs_emit(buf, "%u\n", fan_watchdog_maxinterval);
8693 }
8694
fan_watchdog_store(struct device_driver * drv,const char * buf,size_t count)8695 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
8696 size_t count)
8697 {
8698 unsigned long t;
8699
8700 if (parse_strtoul(buf, 120, &t))
8701 return -EINVAL;
8702
8703 if (!fan_control_allowed)
8704 return -EPERM;
8705
8706 fan_watchdog_maxinterval = t;
8707 fan_watchdog_reset();
8708
8709 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8710
8711 return count;
8712 }
8713 static DRIVER_ATTR_RW(fan_watchdog);
8714
8715 /* --------------------------------------------------------------------- */
8716
8717 static struct attribute *fan_attributes[] = {
8718 &dev_attr_pwm1_enable.attr,
8719 &dev_attr_pwm1.attr,
8720 &dev_attr_fan1_input.attr,
8721 &dev_attr_fan2_input.attr,
8722 NULL
8723 };
8724
fan_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)8725 static umode_t fan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
8726 int n)
8727 {
8728 if (fan_status_access_mode == TPACPI_FAN_NONE &&
8729 fan_control_access_mode == TPACPI_FAN_WR_NONE)
8730 return 0;
8731
8732 if (attr == &dev_attr_fan2_input.attr) {
8733 if (!tp_features.second_fan)
8734 return 0;
8735 }
8736
8737 return attr->mode;
8738 }
8739
8740 static const struct attribute_group fan_attr_group = {
8741 .is_visible = fan_attr_is_visible,
8742 .attrs = fan_attributes,
8743 };
8744
8745 static struct attribute *fan_driver_attributes[] = {
8746 &driver_attr_fan_watchdog.attr,
8747 NULL
8748 };
8749
8750 static const struct attribute_group fan_driver_attr_group = {
8751 .is_visible = fan_attr_is_visible,
8752 .attrs = fan_driver_attributes,
8753 };
8754
8755 #define TPACPI_FAN_Q1 0x0001 /* Uninitialized HFSP */
8756 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
8757 #define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */
8758 #define TPACPI_FAN_NOFAN 0x0008 /* no fan available */
8759 #define TPACPI_FAN_NS 0x0010 /* For EC with non-Standard register addresses */
8760 #define TPACPI_FAN_DECRPM 0x0020 /* For ECFW's with RPM in register as decimal */
8761
8762 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8763 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
8764 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1),
8765 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
8766 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
8767 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN),
8768 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN),
8769 TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL), /* P70 */
8770 TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL), /* P50 */
8771 TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL), /* P71 */
8772 TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL), /* P51 */
8773 TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL), /* P52 / P72 */
8774 TPACPI_Q_LNV3('N', '2', 'N', TPACPI_FAN_2CTL), /* P53 / P73 */
8775 TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (1st gen) */
8776 TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (2nd gen) */
8777 TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL), /* P15 (1st gen) / P15v (1st gen) */
8778 TPACPI_Q_LNV3('N', '3', '7', TPACPI_FAN_2CTL), /* T15g (2nd gen) */
8779 TPACPI_Q_LNV3('R', '1', 'F', TPACPI_FAN_NS), /* L13 Yoga Gen 2 */
8780 TPACPI_Q_LNV3('N', '2', 'U', TPACPI_FAN_NS), /* X13 Yoga Gen 2*/
8781 TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN), /* X1 Tablet (2nd gen) */
8782 TPACPI_Q_LNV3('R', '0', 'Q', TPACPI_FAN_DECRPM),/* L480 */
8783 };
8784
fan_init(struct ibm_init_struct * iibm)8785 static int __init fan_init(struct ibm_init_struct *iibm)
8786 {
8787 unsigned long quirks;
8788
8789 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8790 "initializing fan subdriver\n");
8791
8792 mutex_init(&fan_mutex);
8793 fan_status_access_mode = TPACPI_FAN_NONE;
8794 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8795 fan_control_commands = 0;
8796 fan_watchdog_maxinterval = 0;
8797 tp_features.fan_ctrl_status_undef = 0;
8798 tp_features.second_fan = 0;
8799 tp_features.second_fan_ctl = 0;
8800 fan_control_desired_level = 7;
8801
8802 if (tpacpi_is_ibm()) {
8803 TPACPI_ACPIHANDLE_INIT(fans);
8804 TPACPI_ACPIHANDLE_INIT(gfan);
8805 TPACPI_ACPIHANDLE_INIT(sfan);
8806 }
8807
8808 quirks = tpacpi_check_quirks(fan_quirk_table,
8809 ARRAY_SIZE(fan_quirk_table));
8810
8811 if (quirks & TPACPI_FAN_NOFAN) {
8812 pr_info("No integrated ThinkPad fan available\n");
8813 return -ENODEV;
8814 }
8815
8816 if (quirks & TPACPI_FAN_NS) {
8817 pr_info("ECFW with non-standard fan reg control found\n");
8818 fan_with_ns_addr = 1;
8819 /* Fan ctrl support from host is undefined for now */
8820 tp_features.fan_ctrl_status_undef = 1;
8821 }
8822
8823 /* Check for the EC/BIOS with RPM reported in decimal*/
8824 if (quirks & TPACPI_FAN_DECRPM) {
8825 pr_info("ECFW with fan RPM as decimal in EC register\n");
8826 ecfw_with_fan_dec_rpm = 1;
8827 tp_features.fan_ctrl_status_undef = 1;
8828 }
8829
8830 if (gfan_handle) {
8831 /* 570, 600e/x, 770e, 770x */
8832 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8833 } else {
8834 /* all other ThinkPads: note that even old-style
8835 * ThinkPad ECs supports the fan control register */
8836 if (fan_with_ns_addr ||
8837 likely(acpi_ec_read(fan_status_offset, &fan_control_initial_status))) {
8838 int res;
8839 unsigned int speed;
8840
8841 fan_status_access_mode = fan_with_ns_addr ?
8842 TPACPI_FAN_RD_TPEC_NS : TPACPI_FAN_RD_TPEC;
8843
8844 if (quirks & TPACPI_FAN_Q1)
8845 fan_quirk1_setup();
8846 /* Try and probe the 2nd fan */
8847 tp_features.second_fan = 1; /* needed for get_speed to work */
8848 res = fan2_get_speed(&speed);
8849 if (res >= 0 && speed != FAN_NOT_PRESENT) {
8850 /* It responded - so let's assume it's there */
8851 tp_features.second_fan = 1;
8852 /* fan control not currently available for ns ECFW */
8853 tp_features.second_fan_ctl = !fan_with_ns_addr;
8854 pr_info("secondary fan control detected & enabled\n");
8855 } else {
8856 /* Fan not auto-detected */
8857 tp_features.second_fan = 0;
8858 if (quirks & TPACPI_FAN_2FAN) {
8859 tp_features.second_fan = 1;
8860 pr_info("secondary fan support enabled\n");
8861 }
8862 if (quirks & TPACPI_FAN_2CTL) {
8863 tp_features.second_fan = 1;
8864 tp_features.second_fan_ctl = 1;
8865 pr_info("secondary fan control enabled\n");
8866 }
8867 }
8868 } else {
8869 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
8870 return -ENODEV;
8871 }
8872 }
8873
8874 if (sfan_handle) {
8875 /* 570, 770x-JL */
8876 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8877 fan_control_commands |=
8878 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8879 } else {
8880 if (!gfan_handle) {
8881 /* gfan without sfan means no fan control */
8882 /* all other models implement TP EC 0x2f control */
8883
8884 if (fans_handle) {
8885 /* X31, X40, X41 */
8886 fan_control_access_mode =
8887 TPACPI_FAN_WR_ACPI_FANS;
8888 fan_control_commands |=
8889 TPACPI_FAN_CMD_SPEED |
8890 TPACPI_FAN_CMD_LEVEL |
8891 TPACPI_FAN_CMD_ENABLE;
8892 } else {
8893 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8894 fan_control_commands |=
8895 TPACPI_FAN_CMD_LEVEL |
8896 TPACPI_FAN_CMD_ENABLE;
8897 }
8898 }
8899 }
8900
8901 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8902 "fan is %s, modes %d, %d\n",
8903 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8904 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8905 fan_status_access_mode, fan_control_access_mode);
8906
8907 /* fan control master switch */
8908 if (!fan_control_allowed) {
8909 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8910 fan_control_commands = 0;
8911 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8912 "fan control features disabled by parameter\n");
8913 }
8914
8915 /* update fan_control_desired_level */
8916 if (fan_status_access_mode != TPACPI_FAN_NONE)
8917 fan_get_status_safe(NULL);
8918
8919 if (fan_status_access_mode == TPACPI_FAN_NONE &&
8920 fan_control_access_mode == TPACPI_FAN_WR_NONE)
8921 return -ENODEV;
8922
8923 return 0;
8924 }
8925
fan_exit(void)8926 static void fan_exit(void)
8927 {
8928 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8929 "cancelling any pending fan watchdog tasks\n");
8930
8931 cancel_delayed_work(&fan_watchdog_task);
8932 flush_workqueue(tpacpi_wq);
8933 }
8934
fan_suspend(void)8935 static void fan_suspend(void)
8936 {
8937 int rc;
8938
8939 if (!fan_control_allowed)
8940 return;
8941
8942 /* Store fan status in cache */
8943 fan_control_resume_level = 0;
8944 rc = fan_get_status_safe(&fan_control_resume_level);
8945 if (rc)
8946 pr_notice("failed to read fan level for later restore during resume: %d\n",
8947 rc);
8948
8949 /* if it is undefined, don't attempt to restore it.
8950 * KEEP THIS LAST */
8951 if (tp_features.fan_ctrl_status_undef)
8952 fan_control_resume_level = 0;
8953 }
8954
fan_resume(void)8955 static void fan_resume(void)
8956 {
8957 u8 current_level = 7;
8958 bool do_set = false;
8959 int rc;
8960
8961 /* DSDT *always* updates status on resume */
8962 tp_features.fan_ctrl_status_undef = 0;
8963
8964 if (!fan_control_allowed ||
8965 !fan_control_resume_level ||
8966 fan_get_status_safe(¤t_level))
8967 return;
8968
8969 switch (fan_control_access_mode) {
8970 case TPACPI_FAN_WR_ACPI_SFAN:
8971 /* never decrease fan level */
8972 do_set = (fan_control_resume_level > current_level);
8973 break;
8974 case TPACPI_FAN_WR_ACPI_FANS:
8975 case TPACPI_FAN_WR_TPEC:
8976 /* never decrease fan level, scale is:
8977 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8978 *
8979 * We expect the firmware to set either 7 or AUTO, but we
8980 * handle FULLSPEED out of paranoia.
8981 *
8982 * So, we can safely only restore FULLSPEED or 7, anything
8983 * else could slow the fan. Restoring AUTO is useless, at
8984 * best that's exactly what the DSDT already set (it is the
8985 * slower it uses).
8986 *
8987 * Always keep in mind that the DSDT *will* have set the
8988 * fans to what the vendor supposes is the best level. We
8989 * muck with it only to speed the fan up.
8990 */
8991 if (fan_control_resume_level != 7 &&
8992 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8993 return;
8994 else
8995 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8996 (current_level != fan_control_resume_level);
8997 break;
8998 default:
8999 return;
9000 }
9001 if (do_set) {
9002 pr_notice("restoring fan level to 0x%02x\n",
9003 fan_control_resume_level);
9004 rc = fan_set_level_safe(fan_control_resume_level);
9005 if (rc < 0)
9006 pr_notice("failed to restore fan level: %d\n", rc);
9007 }
9008 }
9009
fan_read(struct seq_file * m)9010 static int fan_read(struct seq_file *m)
9011 {
9012 int rc;
9013 u8 status;
9014 unsigned int speed = 0;
9015
9016 switch (fan_status_access_mode) {
9017 case TPACPI_FAN_RD_ACPI_GFAN:
9018 /* 570, 600e/x, 770e, 770x */
9019 rc = fan_get_status_safe(&status);
9020 if (rc)
9021 return rc;
9022
9023 seq_printf(m, "status:\t\t%s\n"
9024 "level:\t\t%d\n",
9025 str_enabled_disabled(status), status);
9026 break;
9027
9028 case TPACPI_FAN_RD_TPEC_NS:
9029 case TPACPI_FAN_RD_TPEC:
9030 /* all except 570, 600e/x, 770e, 770x */
9031 rc = fan_get_status_safe(&status);
9032 if (rc)
9033 return rc;
9034
9035 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status));
9036
9037 rc = fan_get_speed(&speed);
9038 if (rc < 0)
9039 return rc;
9040
9041 /* Check for fan speeds displayed in hexadecimal */
9042 if (!ecfw_with_fan_dec_rpm)
9043 seq_printf(m, "speed:\t\t%d\n", speed);
9044 else
9045 seq_printf(m, "speed:\t\t%x\n", speed);
9046
9047 if (fan_status_access_mode == TPACPI_FAN_RD_TPEC_NS) {
9048 /*
9049 * No full speed bit in NS EC
9050 * EC Auto mode is set by default.
9051 * No other levels settings available
9052 */
9053 seq_printf(m, "level:\t\t%s\n", status & FAN_NS_CTRL ? "unknown" : "auto");
9054 } else {
9055 if (status & TP_EC_FAN_FULLSPEED)
9056 /* Disengaged mode takes precedence */
9057 seq_printf(m, "level:\t\tdisengaged\n");
9058 else if (status & TP_EC_FAN_AUTO)
9059 seq_printf(m, "level:\t\tauto\n");
9060 else
9061 seq_printf(m, "level:\t\t%d\n", status);
9062 }
9063 break;
9064
9065 case TPACPI_FAN_NONE:
9066 default:
9067 seq_printf(m, "status:\t\tnot supported\n");
9068 }
9069
9070 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
9071 seq_printf(m, "commands:\tlevel <level>");
9072
9073 switch (fan_control_access_mode) {
9074 case TPACPI_FAN_WR_ACPI_SFAN:
9075 seq_printf(m, " (<level> is 0-7)\n");
9076 break;
9077
9078 default:
9079 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
9080 break;
9081 }
9082 }
9083
9084 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
9085 seq_printf(m, "commands:\tenable, disable\n"
9086 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
9087
9088 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
9089 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
9090
9091 return 0;
9092 }
9093
fan_write_cmd_level(const char * cmd,int * rc)9094 static int fan_write_cmd_level(const char *cmd, int *rc)
9095 {
9096 int level;
9097
9098 if (strstarts(cmd, "level auto"))
9099 level = TP_EC_FAN_AUTO;
9100 else if (strstarts(cmd, "level disengaged") || strstarts(cmd, "level full-speed"))
9101 level = TP_EC_FAN_FULLSPEED;
9102 else if (sscanf(cmd, "level %d", &level) != 1)
9103 return 0;
9104
9105 *rc = fan_set_level_safe(level);
9106 if (*rc == -ENXIO)
9107 pr_err("level command accepted for unsupported access mode %d\n",
9108 fan_control_access_mode);
9109 else if (!*rc)
9110 tpacpi_disclose_usertask("procfs fan",
9111 "set level to %d\n", level);
9112
9113 return 1;
9114 }
9115
fan_write_cmd_enable(const char * cmd,int * rc)9116 static int fan_write_cmd_enable(const char *cmd, int *rc)
9117 {
9118 if (!strstarts(cmd, "enable"))
9119 return 0;
9120
9121 *rc = fan_set_enable();
9122 if (*rc == -ENXIO)
9123 pr_err("enable command accepted for unsupported access mode %d\n",
9124 fan_control_access_mode);
9125 else if (!*rc)
9126 tpacpi_disclose_usertask("procfs fan", "enable\n");
9127
9128 return 1;
9129 }
9130
fan_write_cmd_disable(const char * cmd,int * rc)9131 static int fan_write_cmd_disable(const char *cmd, int *rc)
9132 {
9133 if (!strstarts(cmd, "disable"))
9134 return 0;
9135
9136 *rc = fan_set_disable();
9137 if (*rc == -ENXIO)
9138 pr_err("disable command accepted for unsupported access mode %d\n",
9139 fan_control_access_mode);
9140 else if (!*rc)
9141 tpacpi_disclose_usertask("procfs fan", "disable\n");
9142
9143 return 1;
9144 }
9145
fan_write_cmd_speed(const char * cmd,int * rc)9146 static int fan_write_cmd_speed(const char *cmd, int *rc)
9147 {
9148 int speed;
9149
9150 /* TODO:
9151 * Support speed <low> <medium> <high> ? */
9152
9153 if (sscanf(cmd, "speed %d", &speed) != 1)
9154 return 0;
9155
9156 *rc = fan_set_speed(speed);
9157 if (*rc == -ENXIO)
9158 pr_err("speed command accepted for unsupported access mode %d\n",
9159 fan_control_access_mode);
9160 else if (!*rc)
9161 tpacpi_disclose_usertask("procfs fan",
9162 "set speed to %d\n", speed);
9163
9164 return 1;
9165 }
9166
fan_write_cmd_watchdog(const char * cmd,int * rc)9167 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
9168 {
9169 int interval;
9170
9171 if (sscanf(cmd, "watchdog %d", &interval) != 1)
9172 return 0;
9173
9174 if (interval < 0 || interval > 120)
9175 *rc = -EINVAL;
9176 else {
9177 fan_watchdog_maxinterval = interval;
9178 tpacpi_disclose_usertask("procfs fan",
9179 "set watchdog timer to %d\n",
9180 interval);
9181 }
9182
9183 return 1;
9184 }
9185
fan_write(char * buf)9186 static int fan_write(char *buf)
9187 {
9188 char *cmd;
9189 int rc = 0;
9190
9191 while (!rc && (cmd = strsep(&buf, ","))) {
9192 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
9193 fan_write_cmd_level(cmd, &rc)) &&
9194 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
9195 (fan_write_cmd_enable(cmd, &rc) ||
9196 fan_write_cmd_disable(cmd, &rc) ||
9197 fan_write_cmd_watchdog(cmd, &rc))) &&
9198 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
9199 fan_write_cmd_speed(cmd, &rc))
9200 )
9201 rc = -EINVAL;
9202 else if (!rc)
9203 fan_watchdog_reset();
9204 }
9205
9206 return rc;
9207 }
9208
9209 static struct ibm_struct fan_driver_data = {
9210 .name = "fan",
9211 .read = fan_read,
9212 .write = fan_write,
9213 .exit = fan_exit,
9214 .suspend = fan_suspend,
9215 .resume = fan_resume,
9216 };
9217
9218 /*************************************************************************
9219 * Mute LED subdriver
9220 */
9221
9222 #define TPACPI_LED_MAX 2
9223
9224 struct tp_led_table {
9225 acpi_string name;
9226 int on_value;
9227 int off_value;
9228 int state;
9229 };
9230
9231 static struct tp_led_table led_tables[TPACPI_LED_MAX] = {
9232 [LED_AUDIO_MUTE] = {
9233 .name = "SSMS",
9234 .on_value = 1,
9235 .off_value = 0,
9236 },
9237 [LED_AUDIO_MICMUTE] = {
9238 .name = "MMTS",
9239 .on_value = 2,
9240 .off_value = 0,
9241 },
9242 };
9243
mute_led_on_off(struct tp_led_table * t,bool state)9244 static int mute_led_on_off(struct tp_led_table *t, bool state)
9245 {
9246 acpi_handle temp;
9247 int output;
9248
9249 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9250 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
9251 return -EIO;
9252 }
9253
9254 if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
9255 state ? t->on_value : t->off_value))
9256 return -EIO;
9257
9258 t->state = state;
9259 return state;
9260 }
9261
tpacpi_led_set(int whichled,bool on)9262 static int tpacpi_led_set(int whichled, bool on)
9263 {
9264 struct tp_led_table *t;
9265
9266 t = &led_tables[whichled];
9267 if (t->state < 0 || t->state == on)
9268 return t->state;
9269 return mute_led_on_off(t, on);
9270 }
9271
tpacpi_led_mute_set(struct led_classdev * led_cdev,enum led_brightness brightness)9272 static int tpacpi_led_mute_set(struct led_classdev *led_cdev,
9273 enum led_brightness brightness)
9274 {
9275 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF);
9276 }
9277
tpacpi_led_micmute_set(struct led_classdev * led_cdev,enum led_brightness brightness)9278 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev,
9279 enum led_brightness brightness)
9280 {
9281 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF);
9282 }
9283
9284 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = {
9285 [LED_AUDIO_MUTE] = {
9286 .name = "platform::mute",
9287 .max_brightness = 1,
9288 .brightness_set_blocking = tpacpi_led_mute_set,
9289 .default_trigger = "audio-mute",
9290 },
9291 [LED_AUDIO_MICMUTE] = {
9292 .name = "platform::micmute",
9293 .max_brightness = 1,
9294 .brightness_set_blocking = tpacpi_led_micmute_set,
9295 .default_trigger = "audio-micmute",
9296 },
9297 };
9298
mute_led_init(struct ibm_init_struct * iibm)9299 static int mute_led_init(struct ibm_init_struct *iibm)
9300 {
9301 acpi_handle temp;
9302 int i, err;
9303
9304 for (i = 0; i < TPACPI_LED_MAX; i++) {
9305 struct tp_led_table *t = &led_tables[i];
9306 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9307 t->state = -ENODEV;
9308 continue;
9309 }
9310
9311 mute_led_cdev[i].brightness = ledtrig_audio_get(i);
9312 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]);
9313 if (err < 0) {
9314 while (i--)
9315 led_classdev_unregister(&mute_led_cdev[i]);
9316 return err;
9317 }
9318 }
9319 return 0;
9320 }
9321
mute_led_exit(void)9322 static void mute_led_exit(void)
9323 {
9324 int i;
9325
9326 for (i = 0; i < TPACPI_LED_MAX; i++) {
9327 led_classdev_unregister(&mute_led_cdev[i]);
9328 tpacpi_led_set(i, false);
9329 }
9330 }
9331
mute_led_resume(void)9332 static void mute_led_resume(void)
9333 {
9334 int i;
9335
9336 for (i = 0; i < TPACPI_LED_MAX; i++) {
9337 struct tp_led_table *t = &led_tables[i];
9338 if (t->state >= 0)
9339 mute_led_on_off(t, t->state);
9340 }
9341 }
9342
9343 static struct ibm_struct mute_led_driver_data = {
9344 .name = "mute_led",
9345 .exit = mute_led_exit,
9346 .resume = mute_led_resume,
9347 };
9348
9349 /*
9350 * Battery Wear Control Driver
9351 * Contact: Ognjen Galic <smclt30p@gmail.com>
9352 */
9353
9354 /* Metadata */
9355
9356 #define GET_START "BCTG"
9357 #define SET_START "BCCS"
9358 #define GET_STOP "BCSG"
9359 #define SET_STOP "BCSS"
9360 #define GET_DISCHARGE "BDSG"
9361 #define SET_DISCHARGE "BDSS"
9362 #define GET_INHIBIT "BICG"
9363 #define SET_INHIBIT "BICS"
9364
9365 enum {
9366 BAT_ANY = 0,
9367 BAT_PRIMARY = 1,
9368 BAT_SECONDARY = 2
9369 };
9370
9371 enum {
9372 /* Error condition bit */
9373 METHOD_ERR = BIT(31),
9374 };
9375
9376 enum {
9377 /* This is used in the get/set helpers */
9378 THRESHOLD_START,
9379 THRESHOLD_STOP,
9380 FORCE_DISCHARGE,
9381 INHIBIT_CHARGE,
9382 };
9383
9384 struct tpacpi_battery_data {
9385 int charge_start;
9386 int start_support;
9387 int charge_stop;
9388 int stop_support;
9389 unsigned int charge_behaviours;
9390 };
9391
9392 struct tpacpi_battery_driver_data {
9393 struct tpacpi_battery_data batteries[3];
9394 int individual_addressing;
9395 };
9396
9397 static struct tpacpi_battery_driver_data battery_info;
9398
9399 /* ACPI helpers/functions/probes */
9400
9401 /**
9402 * This evaluates a ACPI method call specific to the battery
9403 * ACPI extension. The specifics are that an error is marked
9404 * in the 32rd bit of the response, so we just check that here.
9405 */
tpacpi_battery_acpi_eval(char * method,int * ret,int param)9406 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param)
9407 {
9408 int response;
9409
9410 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) {
9411 acpi_handle_err(hkey_handle, "%s: evaluate failed", method);
9412 return AE_ERROR;
9413 }
9414 if (response & METHOD_ERR) {
9415 acpi_handle_err(hkey_handle,
9416 "%s evaluated but flagged as error", method);
9417 return AE_ERROR;
9418 }
9419 *ret = response;
9420 return AE_OK;
9421 }
9422
tpacpi_battery_get(int what,int battery,int * ret)9423 static int tpacpi_battery_get(int what, int battery, int *ret)
9424 {
9425 switch (what) {
9426 case THRESHOLD_START:
9427 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery))
9428 return -ENODEV;
9429
9430 /* The value is in the low 8 bits of the response */
9431 *ret = *ret & 0xFF;
9432 return 0;
9433 case THRESHOLD_STOP:
9434 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery))
9435 return -ENODEV;
9436 /* Value is in lower 8 bits */
9437 *ret = *ret & 0xFF;
9438 /*
9439 * On the stop value, if we return 0 that
9440 * does not make any sense. 0 means Default, which
9441 * means that charging stops at 100%, so we return
9442 * that.
9443 */
9444 if (*ret == 0)
9445 *ret = 100;
9446 return 0;
9447 case FORCE_DISCHARGE:
9448 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, ret, battery))
9449 return -ENODEV;
9450 /* The force discharge status is in bit 0 */
9451 *ret = *ret & 0x01;
9452 return 0;
9453 case INHIBIT_CHARGE:
9454 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, ret, battery))
9455 return -ENODEV;
9456 /* The inhibit charge status is in bit 0 */
9457 *ret = *ret & 0x01;
9458 return 0;
9459 default:
9460 pr_crit("wrong parameter: %d", what);
9461 return -EINVAL;
9462 }
9463 }
9464
tpacpi_battery_set(int what,int battery,int value)9465 static int tpacpi_battery_set(int what, int battery, int value)
9466 {
9467 int param, ret;
9468 /* The first 8 bits are the value of the threshold */
9469 param = value;
9470 /* The battery ID is in bits 8-9, 2 bits */
9471 param |= battery << 8;
9472
9473 switch (what) {
9474 case THRESHOLD_START:
9475 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) {
9476 pr_err("failed to set charge threshold on battery %d",
9477 battery);
9478 return -ENODEV;
9479 }
9480 return 0;
9481 case THRESHOLD_STOP:
9482 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) {
9483 pr_err("failed to set stop threshold: %d", battery);
9484 return -ENODEV;
9485 }
9486 return 0;
9487 case FORCE_DISCHARGE:
9488 /* Force discharge is in bit 0,
9489 * break on AC attach is in bit 1 (won't work on some ThinkPads),
9490 * battery ID is in bits 8-9, 2 bits.
9491 */
9492 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_DISCHARGE, &ret, param))) {
9493 pr_err("failed to set force discharge on %d", battery);
9494 return -ENODEV;
9495 }
9496 return 0;
9497 case INHIBIT_CHARGE:
9498 /* When setting inhibit charge, we set a default value of
9499 * always breaking on AC detach and the effective time is set to
9500 * be permanent.
9501 * The battery ID is in bits 4-5, 2 bits,
9502 * the effective time is in bits 8-23, 2 bytes.
9503 * A time of FFFF indicates forever.
9504 */
9505 param = value;
9506 param |= battery << 4;
9507 param |= 0xFFFF << 8;
9508 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_INHIBIT, &ret, param))) {
9509 pr_err("failed to set inhibit charge on %d", battery);
9510 return -ENODEV;
9511 }
9512 return 0;
9513 default:
9514 pr_crit("wrong parameter: %d", what);
9515 return -EINVAL;
9516 }
9517 }
9518
tpacpi_battery_set_validate(int what,int battery,int value)9519 static int tpacpi_battery_set_validate(int what, int battery, int value)
9520 {
9521 int ret, v;
9522
9523 ret = tpacpi_battery_set(what, battery, value);
9524 if (ret < 0)
9525 return ret;
9526
9527 ret = tpacpi_battery_get(what, battery, &v);
9528 if (ret < 0)
9529 return ret;
9530
9531 if (v == value)
9532 return 0;
9533
9534 msleep(500);
9535
9536 ret = tpacpi_battery_get(what, battery, &v);
9537 if (ret < 0)
9538 return ret;
9539
9540 if (v == value)
9541 return 0;
9542
9543 return -EIO;
9544 }
9545
tpacpi_battery_probe(int battery)9546 static int tpacpi_battery_probe(int battery)
9547 {
9548 int ret = 0;
9549
9550 memset(&battery_info.batteries[battery], 0,
9551 sizeof(battery_info.batteries[battery]));
9552
9553 /*
9554 * 1) Get the current start threshold
9555 * 2) Check for support
9556 * 3) Get the current stop threshold
9557 * 4) Check for support
9558 * 5) Get the current force discharge status
9559 * 6) Check for support
9560 * 7) Get the current inhibit charge status
9561 * 8) Check for support
9562 */
9563 if (acpi_has_method(hkey_handle, GET_START)) {
9564 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
9565 pr_err("Error probing battery %d\n", battery);
9566 return -ENODEV;
9567 }
9568 /* Individual addressing is in bit 9 */
9569 if (ret & BIT(9))
9570 battery_info.individual_addressing = true;
9571 /* Support is marked in bit 8 */
9572 if (ret & BIT(8))
9573 battery_info.batteries[battery].start_support = 1;
9574 else
9575 return -ENODEV;
9576 if (tpacpi_battery_get(THRESHOLD_START, battery,
9577 &battery_info.batteries[battery].charge_start)) {
9578 pr_err("Error probing battery %d\n", battery);
9579 return -ENODEV;
9580 }
9581 }
9582 if (acpi_has_method(hkey_handle, GET_STOP)) {
9583 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) {
9584 pr_err("Error probing battery stop; %d\n", battery);
9585 return -ENODEV;
9586 }
9587 /* Support is marked in bit 8 */
9588 if (ret & BIT(8))
9589 battery_info.batteries[battery].stop_support = 1;
9590 else
9591 return -ENODEV;
9592 if (tpacpi_battery_get(THRESHOLD_STOP, battery,
9593 &battery_info.batteries[battery].charge_stop)) {
9594 pr_err("Error probing battery stop: %d\n", battery);
9595 return -ENODEV;
9596 }
9597 }
9598 if (acpi_has_method(hkey_handle, GET_DISCHARGE)) {
9599 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, &ret, battery))) {
9600 pr_err("Error probing battery discharge; %d\n", battery);
9601 return -ENODEV;
9602 }
9603 /* Support is marked in bit 8 */
9604 if (ret & BIT(8))
9605 battery_info.batteries[battery].charge_behaviours |=
9606 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE);
9607 }
9608 if (acpi_has_method(hkey_handle, GET_INHIBIT)) {
9609 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, &ret, battery))) {
9610 pr_err("Error probing battery inhibit charge; %d\n", battery);
9611 return -ENODEV;
9612 }
9613 /* Support is marked in bit 5 */
9614 if (ret & BIT(5))
9615 battery_info.batteries[battery].charge_behaviours |=
9616 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE);
9617 }
9618
9619 battery_info.batteries[battery].charge_behaviours |=
9620 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO);
9621
9622 pr_info("battery %d registered (start %d, stop %d, behaviours: 0x%x)\n",
9623 battery,
9624 battery_info.batteries[battery].charge_start,
9625 battery_info.batteries[battery].charge_stop,
9626 battery_info.batteries[battery].charge_behaviours);
9627
9628 return 0;
9629 }
9630
9631 /* General helper functions */
9632
tpacpi_battery_get_id(const char * battery_name)9633 static int tpacpi_battery_get_id(const char *battery_name)
9634 {
9635
9636 if (strcmp(battery_name, "BAT0") == 0 ||
9637 tp_features.battery_force_primary)
9638 return BAT_PRIMARY;
9639 if (strcmp(battery_name, "BAT1") == 0)
9640 return BAT_SECONDARY;
9641 /*
9642 * If for some reason the battery is not BAT0 nor is it
9643 * BAT1, we will assume it's the default, first battery,
9644 * AKA primary.
9645 */
9646 pr_warn("unknown battery %s, assuming primary", battery_name);
9647 return BAT_PRIMARY;
9648 }
9649
9650 /* sysfs interface */
9651
tpacpi_battery_store(int what,struct device * dev,const char * buf,size_t count)9652 static ssize_t tpacpi_battery_store(int what,
9653 struct device *dev,
9654 const char *buf, size_t count)
9655 {
9656 struct power_supply *supply = to_power_supply(dev);
9657 unsigned long value;
9658 int battery, rval;
9659 /*
9660 * Some systems have support for more than
9661 * one battery. If that is the case,
9662 * tpacpi_battery_probe marked that addressing
9663 * them individually is supported, so we do that
9664 * based on the device struct.
9665 *
9666 * On systems that are not supported, we assume
9667 * the primary as most of the ACPI calls fail
9668 * with "Any Battery" as the parameter.
9669 */
9670 if (battery_info.individual_addressing)
9671 /* BAT_PRIMARY or BAT_SECONDARY */
9672 battery = tpacpi_battery_get_id(supply->desc->name);
9673 else
9674 battery = BAT_PRIMARY;
9675
9676 rval = kstrtoul(buf, 10, &value);
9677 if (rval)
9678 return rval;
9679
9680 switch (what) {
9681 case THRESHOLD_START:
9682 if (!battery_info.batteries[battery].start_support)
9683 return -ENODEV;
9684 /* valid values are [0, 99] */
9685 if (value > 99)
9686 return -EINVAL;
9687 if (value > battery_info.batteries[battery].charge_stop)
9688 return -EINVAL;
9689 if (tpacpi_battery_set(THRESHOLD_START, battery, value))
9690 return -ENODEV;
9691 battery_info.batteries[battery].charge_start = value;
9692 return count;
9693
9694 case THRESHOLD_STOP:
9695 if (!battery_info.batteries[battery].stop_support)
9696 return -ENODEV;
9697 /* valid values are [1, 100] */
9698 if (value < 1 || value > 100)
9699 return -EINVAL;
9700 if (value < battery_info.batteries[battery].charge_start)
9701 return -EINVAL;
9702 battery_info.batteries[battery].charge_stop = value;
9703 /*
9704 * When 100 is passed to stop, we need to flip
9705 * it to 0 as that the EC understands that as
9706 * "Default", which will charge to 100%
9707 */
9708 if (value == 100)
9709 value = 0;
9710 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value))
9711 return -EINVAL;
9712 return count;
9713 default:
9714 pr_crit("Wrong parameter: %d", what);
9715 return -EINVAL;
9716 }
9717 return count;
9718 }
9719
tpacpi_battery_show(int what,struct device * dev,char * buf)9720 static ssize_t tpacpi_battery_show(int what,
9721 struct device *dev,
9722 char *buf)
9723 {
9724 struct power_supply *supply = to_power_supply(dev);
9725 int ret, battery;
9726 /*
9727 * Some systems have support for more than
9728 * one battery. If that is the case,
9729 * tpacpi_battery_probe marked that addressing
9730 * them individually is supported, so we;
9731 * based on the device struct.
9732 *
9733 * On systems that are not supported, we assume
9734 * the primary as most of the ACPI calls fail
9735 * with "Any Battery" as the parameter.
9736 */
9737 if (battery_info.individual_addressing)
9738 /* BAT_PRIMARY or BAT_SECONDARY */
9739 battery = tpacpi_battery_get_id(supply->desc->name);
9740 else
9741 battery = BAT_PRIMARY;
9742 if (tpacpi_battery_get(what, battery, &ret))
9743 return -ENODEV;
9744 return sprintf(buf, "%d\n", ret);
9745 }
9746
charge_control_start_threshold_show(struct device * device,struct device_attribute * attr,char * buf)9747 static ssize_t charge_control_start_threshold_show(struct device *device,
9748 struct device_attribute *attr,
9749 char *buf)
9750 {
9751 return tpacpi_battery_show(THRESHOLD_START, device, buf);
9752 }
9753
charge_control_end_threshold_show(struct device * device,struct device_attribute * attr,char * buf)9754 static ssize_t charge_control_end_threshold_show(struct device *device,
9755 struct device_attribute *attr,
9756 char *buf)
9757 {
9758 return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
9759 }
9760
charge_behaviour_show(struct device * dev,struct device_attribute * attr,char * buf)9761 static ssize_t charge_behaviour_show(struct device *dev,
9762 struct device_attribute *attr,
9763 char *buf)
9764 {
9765 enum power_supply_charge_behaviour active = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO;
9766 struct power_supply *supply = to_power_supply(dev);
9767 unsigned int available;
9768 int ret, battery;
9769
9770 battery = tpacpi_battery_get_id(supply->desc->name);
9771 available = battery_info.batteries[battery].charge_behaviours;
9772
9773 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) {
9774 if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret))
9775 return -ENODEV;
9776 if (ret) {
9777 active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE;
9778 goto out;
9779 }
9780 }
9781
9782 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) {
9783 if (tpacpi_battery_get(INHIBIT_CHARGE, battery, &ret))
9784 return -ENODEV;
9785 if (ret) {
9786 active = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE;
9787 goto out;
9788 }
9789 }
9790
9791 out:
9792 return power_supply_charge_behaviour_show(dev, available, active, buf);
9793 }
9794
charge_control_start_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9795 static ssize_t charge_control_start_threshold_store(struct device *dev,
9796 struct device_attribute *attr,
9797 const char *buf, size_t count)
9798 {
9799 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count);
9800 }
9801
charge_control_end_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9802 static ssize_t charge_control_end_threshold_store(struct device *dev,
9803 struct device_attribute *attr,
9804 const char *buf, size_t count)
9805 {
9806 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
9807 }
9808
charge_behaviour_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9809 static ssize_t charge_behaviour_store(struct device *dev,
9810 struct device_attribute *attr,
9811 const char *buf, size_t count)
9812 {
9813 struct power_supply *supply = to_power_supply(dev);
9814 int selected, battery, ret = 0;
9815 unsigned int available;
9816
9817 battery = tpacpi_battery_get_id(supply->desc->name);
9818 available = battery_info.batteries[battery].charge_behaviours;
9819 selected = power_supply_charge_behaviour_parse(available, buf);
9820
9821 if (selected < 0)
9822 return selected;
9823
9824 switch (selected) {
9825 case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO:
9826 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
9827 ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
9828 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
9829 ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0));
9830 if (ret < 0)
9831 return ret;
9832 break;
9833 case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE:
9834 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
9835 ret = tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0);
9836 ret = min(ret, tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1));
9837 if (ret < 0)
9838 return ret;
9839 break;
9840 case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE:
9841 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
9842 ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
9843 ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 1));
9844 if (ret < 0)
9845 return ret;
9846 break;
9847 default:
9848 dev_err(dev, "Unexpected charge behaviour: %d\n", selected);
9849 return -EINVAL;
9850 }
9851
9852 return count;
9853 }
9854
9855 static DEVICE_ATTR_RW(charge_control_start_threshold);
9856 static DEVICE_ATTR_RW(charge_control_end_threshold);
9857 static DEVICE_ATTR_RW(charge_behaviour);
9858 static struct device_attribute dev_attr_charge_start_threshold = __ATTR(
9859 charge_start_threshold,
9860 0644,
9861 charge_control_start_threshold_show,
9862 charge_control_start_threshold_store
9863 );
9864 static struct device_attribute dev_attr_charge_stop_threshold = __ATTR(
9865 charge_stop_threshold,
9866 0644,
9867 charge_control_end_threshold_show,
9868 charge_control_end_threshold_store
9869 );
9870
9871 static struct attribute *tpacpi_battery_attrs[] = {
9872 &dev_attr_charge_control_start_threshold.attr,
9873 &dev_attr_charge_control_end_threshold.attr,
9874 &dev_attr_charge_start_threshold.attr,
9875 &dev_attr_charge_stop_threshold.attr,
9876 &dev_attr_charge_behaviour.attr,
9877 NULL,
9878 };
9879
9880 ATTRIBUTE_GROUPS(tpacpi_battery);
9881
9882 /* ACPI battery hooking */
9883
tpacpi_battery_add(struct power_supply * battery,struct acpi_battery_hook * hook)9884 static int tpacpi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
9885 {
9886 int batteryid = tpacpi_battery_get_id(battery->desc->name);
9887
9888 if (tpacpi_battery_probe(batteryid))
9889 return -ENODEV;
9890 if (device_add_groups(&battery->dev, tpacpi_battery_groups))
9891 return -ENODEV;
9892 return 0;
9893 }
9894
tpacpi_battery_remove(struct power_supply * battery,struct acpi_battery_hook * hook)9895 static int tpacpi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
9896 {
9897 device_remove_groups(&battery->dev, tpacpi_battery_groups);
9898 return 0;
9899 }
9900
9901 static struct acpi_battery_hook battery_hook = {
9902 .add_battery = tpacpi_battery_add,
9903 .remove_battery = tpacpi_battery_remove,
9904 .name = "ThinkPad Battery Extension",
9905 };
9906
9907 /* Subdriver init/exit */
9908
9909 static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
9910 /*
9911 * Individual addressing is broken on models that expose the
9912 * primary battery as BAT1.
9913 */
9914 TPACPI_Q_LNV('8', 'F', true), /* Thinkpad X120e */
9915 TPACPI_Q_LNV('J', '7', true), /* B5400 */
9916 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */
9917 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
9918 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
9919 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
9920 TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */
9921 };
9922
tpacpi_battery_init(struct ibm_init_struct * ibm)9923 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
9924 {
9925 memset(&battery_info, 0, sizeof(battery_info));
9926
9927 tp_features.battery_force_primary = tpacpi_check_quirks(
9928 battery_quirk_table,
9929 ARRAY_SIZE(battery_quirk_table));
9930
9931 battery_hook_register(&battery_hook);
9932 return 0;
9933 }
9934
tpacpi_battery_exit(void)9935 static void tpacpi_battery_exit(void)
9936 {
9937 battery_hook_unregister(&battery_hook);
9938 }
9939
9940 static struct ibm_struct battery_driver_data = {
9941 .name = "battery",
9942 .exit = tpacpi_battery_exit,
9943 };
9944
9945 /*************************************************************************
9946 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature
9947 */
9948
9949 static struct drm_privacy_screen *lcdshadow_dev;
9950 static acpi_handle lcdshadow_get_handle;
9951 static acpi_handle lcdshadow_set_handle;
9952
lcdshadow_set_sw_state(struct drm_privacy_screen * priv,enum drm_privacy_screen_status state)9953 static int lcdshadow_set_sw_state(struct drm_privacy_screen *priv,
9954 enum drm_privacy_screen_status state)
9955 {
9956 int output;
9957
9958 if (WARN_ON(!mutex_is_locked(&priv->lock)))
9959 return -EIO;
9960
9961 if (!acpi_evalf(lcdshadow_set_handle, &output, NULL, "dd", (int)state))
9962 return -EIO;
9963
9964 priv->hw_state = priv->sw_state = state;
9965 return 0;
9966 }
9967
lcdshadow_get_hw_state(struct drm_privacy_screen * priv)9968 static void lcdshadow_get_hw_state(struct drm_privacy_screen *priv)
9969 {
9970 int output;
9971
9972 if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0))
9973 return;
9974
9975 priv->hw_state = priv->sw_state = output & 0x1;
9976 }
9977
9978 static const struct drm_privacy_screen_ops lcdshadow_ops = {
9979 .set_sw_state = lcdshadow_set_sw_state,
9980 .get_hw_state = lcdshadow_get_hw_state,
9981 };
9982
tpacpi_lcdshadow_init(struct ibm_init_struct * iibm)9983 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm)
9984 {
9985 acpi_status status1, status2;
9986 int output;
9987
9988 status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle);
9989 status2 = acpi_get_handle(hkey_handle, "SSSS", &lcdshadow_set_handle);
9990 if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2))
9991 return 0;
9992
9993 if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0))
9994 return -EIO;
9995
9996 if (!(output & 0x10000))
9997 return 0;
9998
9999 lcdshadow_dev = drm_privacy_screen_register(&tpacpi_pdev->dev,
10000 &lcdshadow_ops, NULL);
10001 if (IS_ERR(lcdshadow_dev))
10002 return PTR_ERR(lcdshadow_dev);
10003
10004 return 0;
10005 }
10006
lcdshadow_exit(void)10007 static void lcdshadow_exit(void)
10008 {
10009 drm_privacy_screen_unregister(lcdshadow_dev);
10010 }
10011
lcdshadow_resume(void)10012 static void lcdshadow_resume(void)
10013 {
10014 if (!lcdshadow_dev)
10015 return;
10016
10017 mutex_lock(&lcdshadow_dev->lock);
10018 lcdshadow_set_sw_state(lcdshadow_dev, lcdshadow_dev->sw_state);
10019 mutex_unlock(&lcdshadow_dev->lock);
10020 }
10021
lcdshadow_read(struct seq_file * m)10022 static int lcdshadow_read(struct seq_file *m)
10023 {
10024 if (!lcdshadow_dev) {
10025 seq_puts(m, "status:\t\tnot supported\n");
10026 } else {
10027 seq_printf(m, "status:\t\t%d\n", lcdshadow_dev->hw_state);
10028 seq_puts(m, "commands:\t0, 1\n");
10029 }
10030
10031 return 0;
10032 }
10033
lcdshadow_write(char * buf)10034 static int lcdshadow_write(char *buf)
10035 {
10036 char *cmd;
10037 int res, state = -EINVAL;
10038
10039 if (!lcdshadow_dev)
10040 return -ENODEV;
10041
10042 while ((cmd = strsep(&buf, ","))) {
10043 res = kstrtoint(cmd, 10, &state);
10044 if (res < 0)
10045 return res;
10046 }
10047
10048 if (state >= 2 || state < 0)
10049 return -EINVAL;
10050
10051 mutex_lock(&lcdshadow_dev->lock);
10052 res = lcdshadow_set_sw_state(lcdshadow_dev, state);
10053 mutex_unlock(&lcdshadow_dev->lock);
10054
10055 drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
10056
10057 return res;
10058 }
10059
10060 static struct ibm_struct lcdshadow_driver_data = {
10061 .name = "lcdshadow",
10062 .exit = lcdshadow_exit,
10063 .resume = lcdshadow_resume,
10064 .read = lcdshadow_read,
10065 .write = lcdshadow_write,
10066 };
10067
10068 /*************************************************************************
10069 * Thinkpad sensor interfaces
10070 */
10071
10072 #define DYTC_CMD_QUERY 0 /* To get DYTC status - enable/revision */
10073 #define DYTC_QUERY_ENABLE_BIT 8 /* Bit 8 - 0 = disabled, 1 = enabled */
10074 #define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */
10075 #define DYTC_QUERY_REV_BIT 28 /* Bits 28 - 31 - revision */
10076
10077 #define DYTC_CMD_GET 2 /* To get current IC function and mode */
10078 #define DYTC_GET_LAPMODE_BIT 17 /* Set when in lapmode */
10079
10080 #define PALMSENSOR_PRESENT_BIT 0 /* Determine if psensor present */
10081 #define PALMSENSOR_ON_BIT 1 /* psensor status */
10082
10083 static bool has_palmsensor;
10084 static bool has_lapsensor;
10085 static bool palm_state;
10086 static bool lap_state;
10087 static int dytc_version;
10088
dytc_command(int command,int * output)10089 static int dytc_command(int command, int *output)
10090 {
10091 acpi_handle dytc_handle;
10092
10093 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DYTC", &dytc_handle))) {
10094 /* Platform doesn't support DYTC */
10095 return -ENODEV;
10096 }
10097 if (!acpi_evalf(dytc_handle, output, NULL, "dd", command))
10098 return -EIO;
10099 return 0;
10100 }
10101
lapsensor_get(bool * present,bool * state)10102 static int lapsensor_get(bool *present, bool *state)
10103 {
10104 int output, err;
10105
10106 *present = false;
10107 err = dytc_command(DYTC_CMD_GET, &output);
10108 if (err)
10109 return err;
10110
10111 *present = true; /*If we get his far, we have lapmode support*/
10112 *state = output & BIT(DYTC_GET_LAPMODE_BIT) ? true : false;
10113 return 0;
10114 }
10115
palmsensor_get(bool * present,bool * state)10116 static int palmsensor_get(bool *present, bool *state)
10117 {
10118 acpi_handle psensor_handle;
10119 int output;
10120
10121 *present = false;
10122 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GPSS", &psensor_handle)))
10123 return -ENODEV;
10124 if (!acpi_evalf(psensor_handle, &output, NULL, "d"))
10125 return -EIO;
10126
10127 *present = output & BIT(PALMSENSOR_PRESENT_BIT) ? true : false;
10128 *state = output & BIT(PALMSENSOR_ON_BIT) ? true : false;
10129 return 0;
10130 }
10131
lapsensor_refresh(void)10132 static void lapsensor_refresh(void)
10133 {
10134 bool state;
10135 int err;
10136
10137 if (has_lapsensor) {
10138 err = lapsensor_get(&has_lapsensor, &state);
10139 if (err)
10140 return;
10141 if (lap_state != state) {
10142 lap_state = state;
10143 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "dytc_lapmode");
10144 }
10145 }
10146 }
10147
palmsensor_refresh(void)10148 static void palmsensor_refresh(void)
10149 {
10150 bool state;
10151 int err;
10152
10153 if (has_palmsensor) {
10154 err = palmsensor_get(&has_palmsensor, &state);
10155 if (err)
10156 return;
10157 if (palm_state != state) {
10158 palm_state = state;
10159 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "palmsensor");
10160 }
10161 }
10162 }
10163
dytc_lapmode_show(struct device * dev,struct device_attribute * attr,char * buf)10164 static ssize_t dytc_lapmode_show(struct device *dev,
10165 struct device_attribute *attr,
10166 char *buf)
10167 {
10168 if (has_lapsensor)
10169 return sysfs_emit(buf, "%d\n", lap_state);
10170 return sysfs_emit(buf, "\n");
10171 }
10172 static DEVICE_ATTR_RO(dytc_lapmode);
10173
palmsensor_show(struct device * dev,struct device_attribute * attr,char * buf)10174 static ssize_t palmsensor_show(struct device *dev,
10175 struct device_attribute *attr,
10176 char *buf)
10177 {
10178 if (has_palmsensor)
10179 return sysfs_emit(buf, "%d\n", palm_state);
10180 return sysfs_emit(buf, "\n");
10181 }
10182 static DEVICE_ATTR_RO(palmsensor);
10183
10184 static struct attribute *proxsensor_attributes[] = {
10185 &dev_attr_dytc_lapmode.attr,
10186 &dev_attr_palmsensor.attr,
10187 NULL
10188 };
10189
proxsensor_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10190 static umode_t proxsensor_attr_is_visible(struct kobject *kobj,
10191 struct attribute *attr, int n)
10192 {
10193 if (attr == &dev_attr_dytc_lapmode.attr) {
10194 /*
10195 * Platforms before DYTC version 5 claim to have a lap sensor,
10196 * but it doesn't work, so we ignore them.
10197 */
10198 if (!has_lapsensor || dytc_version < 5)
10199 return 0;
10200 } else if (attr == &dev_attr_palmsensor.attr) {
10201 if (!has_palmsensor)
10202 return 0;
10203 }
10204
10205 return attr->mode;
10206 }
10207
10208 static const struct attribute_group proxsensor_attr_group = {
10209 .is_visible = proxsensor_attr_is_visible,
10210 .attrs = proxsensor_attributes,
10211 };
10212
tpacpi_proxsensor_init(struct ibm_init_struct * iibm)10213 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
10214 {
10215 int palm_err, lap_err;
10216
10217 palm_err = palmsensor_get(&has_palmsensor, &palm_state);
10218 lap_err = lapsensor_get(&has_lapsensor, &lap_state);
10219 /* If support isn't available for both devices return -ENODEV */
10220 if ((palm_err == -ENODEV) && (lap_err == -ENODEV))
10221 return -ENODEV;
10222 /* Otherwise, if there was an error return it */
10223 if (palm_err && (palm_err != -ENODEV))
10224 return palm_err;
10225 if (lap_err && (lap_err != -ENODEV))
10226 return lap_err;
10227
10228 return 0;
10229 }
10230
10231 static struct ibm_struct proxsensor_driver_data = {
10232 .name = "proximity-sensor",
10233 };
10234
10235 /*************************************************************************
10236 * DYTC Platform Profile interface
10237 */
10238
10239 #define DYTC_CMD_SET 1 /* To enable/disable IC function mode */
10240 #define DYTC_CMD_MMC_GET 8 /* To get current MMC function and mode */
10241 #define DYTC_CMD_RESET 0x1ff /* To reset back to default */
10242
10243 #define DYTC_CMD_FUNC_CAP 3 /* To get DYTC capabilities */
10244 #define DYTC_FC_MMC 27 /* MMC Mode supported */
10245 #define DYTC_FC_PSC 29 /* PSC Mode supported */
10246 #define DYTC_FC_AMT 31 /* AMT mode supported */
10247
10248 #define DYTC_GET_FUNCTION_BIT 8 /* Bits 8-11 - function setting */
10249 #define DYTC_GET_MODE_BIT 12 /* Bits 12-15 - mode setting */
10250
10251 #define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */
10252 #define DYTC_SET_MODE_BIT 16 /* Bits 16-19 - mode setting */
10253 #define DYTC_SET_VALID_BIT 20 /* Bit 20 - 1 = on, 0 = off */
10254
10255 #define DYTC_FUNCTION_STD 0 /* Function = 0, standard mode */
10256 #define DYTC_FUNCTION_CQL 1 /* Function = 1, lap mode */
10257 #define DYTC_FUNCTION_MMC 11 /* Function = 11, MMC mode */
10258 #define DYTC_FUNCTION_PSC 13 /* Function = 13, PSC mode */
10259 #define DYTC_FUNCTION_AMT 15 /* Function = 15, AMT mode */
10260
10261 #define DYTC_MODE_AMT_ENABLE 0x1 /* Enable AMT (in balanced mode) */
10262 #define DYTC_MODE_AMT_DISABLE 0xF /* Disable AMT (in other modes) */
10263
10264 #define DYTC_MODE_MMC_PERFORM 2 /* High power mode aka performance */
10265 #define DYTC_MODE_MMC_LOWPOWER 3 /* Low power mode */
10266 #define DYTC_MODE_MMC_BALANCE 0xF /* Default mode aka balanced */
10267 #define DYTC_MODE_MMC_DEFAULT 0 /* Default mode from MMC_GET, aka balanced */
10268
10269 #define DYTC_MODE_PSC_LOWPOWER 3 /* Low power mode */
10270 #define DYTC_MODE_PSC_BALANCE 5 /* Default mode aka balanced */
10271 #define DYTC_MODE_PSC_PERFORM 7 /* High power mode aka performance */
10272
10273 #define DYTC_ERR_MASK 0xF /* Bits 0-3 in cmd result are the error result */
10274 #define DYTC_ERR_SUCCESS 1 /* CMD completed successful */
10275
10276 #define DYTC_SET_COMMAND(function, mode, on) \
10277 (DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \
10278 (mode) << DYTC_SET_MODE_BIT | \
10279 (on) << DYTC_SET_VALID_BIT)
10280
10281 #define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 0)
10282 #define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 1)
10283 static int dytc_control_amt(bool enable);
10284 static bool dytc_amt_active;
10285
10286 static enum platform_profile_option dytc_current_profile;
10287 static atomic_t dytc_ignore_event = ATOMIC_INIT(0);
10288 static DEFINE_MUTEX(dytc_mutex);
10289 static int dytc_capabilities;
10290 static bool dytc_mmc_get_available;
10291 static int profile_force;
10292
convert_dytc_to_profile(int funcmode,int dytcmode,enum platform_profile_option * profile)10293 static int convert_dytc_to_profile(int funcmode, int dytcmode,
10294 enum platform_profile_option *profile)
10295 {
10296 switch (funcmode) {
10297 case DYTC_FUNCTION_MMC:
10298 switch (dytcmode) {
10299 case DYTC_MODE_MMC_LOWPOWER:
10300 *profile = PLATFORM_PROFILE_LOW_POWER;
10301 break;
10302 case DYTC_MODE_MMC_DEFAULT:
10303 case DYTC_MODE_MMC_BALANCE:
10304 *profile = PLATFORM_PROFILE_BALANCED;
10305 break;
10306 case DYTC_MODE_MMC_PERFORM:
10307 *profile = PLATFORM_PROFILE_PERFORMANCE;
10308 break;
10309 default: /* Unknown mode */
10310 return -EINVAL;
10311 }
10312 return 0;
10313 case DYTC_FUNCTION_PSC:
10314 switch (dytcmode) {
10315 case DYTC_MODE_PSC_LOWPOWER:
10316 *profile = PLATFORM_PROFILE_LOW_POWER;
10317 break;
10318 case DYTC_MODE_PSC_BALANCE:
10319 *profile = PLATFORM_PROFILE_BALANCED;
10320 break;
10321 case DYTC_MODE_PSC_PERFORM:
10322 *profile = PLATFORM_PROFILE_PERFORMANCE;
10323 break;
10324 default: /* Unknown mode */
10325 return -EINVAL;
10326 }
10327 return 0;
10328 case DYTC_FUNCTION_AMT:
10329 /* For now return balanced. It's the closest we have to 'auto' */
10330 *profile = PLATFORM_PROFILE_BALANCED;
10331 return 0;
10332 default:
10333 /* Unknown function */
10334 pr_debug("unknown function 0x%x\n", funcmode);
10335 return -EOPNOTSUPP;
10336 }
10337 return 0;
10338 }
10339
convert_profile_to_dytc(enum platform_profile_option profile,int * perfmode)10340 static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode)
10341 {
10342 switch (profile) {
10343 case PLATFORM_PROFILE_LOW_POWER:
10344 if (dytc_capabilities & BIT(DYTC_FC_MMC))
10345 *perfmode = DYTC_MODE_MMC_LOWPOWER;
10346 else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10347 *perfmode = DYTC_MODE_PSC_LOWPOWER;
10348 break;
10349 case PLATFORM_PROFILE_BALANCED:
10350 if (dytc_capabilities & BIT(DYTC_FC_MMC))
10351 *perfmode = DYTC_MODE_MMC_BALANCE;
10352 else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10353 *perfmode = DYTC_MODE_PSC_BALANCE;
10354 break;
10355 case PLATFORM_PROFILE_PERFORMANCE:
10356 if (dytc_capabilities & BIT(DYTC_FC_MMC))
10357 *perfmode = DYTC_MODE_MMC_PERFORM;
10358 else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10359 *perfmode = DYTC_MODE_PSC_PERFORM;
10360 break;
10361 default: /* Unknown profile */
10362 return -EOPNOTSUPP;
10363 }
10364 return 0;
10365 }
10366
10367 /*
10368 * dytc_profile_get: Function to register with platform_profile
10369 * handler. Returns current platform profile.
10370 */
dytc_profile_get(struct platform_profile_handler * pprof,enum platform_profile_option * profile)10371 static int dytc_profile_get(struct platform_profile_handler *pprof,
10372 enum platform_profile_option *profile)
10373 {
10374 *profile = dytc_current_profile;
10375 return 0;
10376 }
10377
dytc_control_amt(bool enable)10378 static int dytc_control_amt(bool enable)
10379 {
10380 int dummy;
10381 int err;
10382 int cmd;
10383
10384 if (!(dytc_capabilities & BIT(DYTC_FC_AMT))) {
10385 pr_warn("Attempting to toggle AMT on a system that doesn't advertise support\n");
10386 return -ENODEV;
10387 }
10388
10389 if (enable)
10390 cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_ENABLE, enable);
10391 else
10392 cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_DISABLE, enable);
10393
10394 pr_debug("%sabling AMT (cmd 0x%x)", enable ? "en":"dis", cmd);
10395 err = dytc_command(cmd, &dummy);
10396 if (err)
10397 return err;
10398 dytc_amt_active = enable;
10399 return 0;
10400 }
10401
10402 /*
10403 * Helper function - check if we are in CQL mode and if we are
10404 * - disable CQL,
10405 * - run the command
10406 * - enable CQL
10407 * If not in CQL mode, just run the command
10408 */
dytc_cql_command(int command,int * output)10409 static int dytc_cql_command(int command, int *output)
10410 {
10411 int err, cmd_err, dummy;
10412 int cur_funcmode;
10413
10414 /* Determine if we are in CQL mode. This alters the commands we do */
10415 err = dytc_command(DYTC_CMD_GET, output);
10416 if (err)
10417 return err;
10418
10419 cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF;
10420 /* Check if we're OK to return immediately */
10421 if ((command == DYTC_CMD_GET) && (cur_funcmode != DYTC_FUNCTION_CQL))
10422 return 0;
10423
10424 if (cur_funcmode == DYTC_FUNCTION_CQL) {
10425 atomic_inc(&dytc_ignore_event);
10426 err = dytc_command(DYTC_DISABLE_CQL, &dummy);
10427 if (err)
10428 return err;
10429 }
10430
10431 cmd_err = dytc_command(command, output);
10432 /* Check return condition after we've restored CQL state */
10433
10434 if (cur_funcmode == DYTC_FUNCTION_CQL) {
10435 err = dytc_command(DYTC_ENABLE_CQL, &dummy);
10436 if (err)
10437 return err;
10438 }
10439 return cmd_err;
10440 }
10441
10442 /*
10443 * dytc_profile_set: Function to register with platform_profile
10444 * handler. Sets current platform profile.
10445 */
dytc_profile_set(struct platform_profile_handler * pprof,enum platform_profile_option profile)10446 static int dytc_profile_set(struct platform_profile_handler *pprof,
10447 enum platform_profile_option profile)
10448 {
10449 int perfmode;
10450 int output;
10451 int err;
10452
10453 err = mutex_lock_interruptible(&dytc_mutex);
10454 if (err)
10455 return err;
10456
10457 err = convert_profile_to_dytc(profile, &perfmode);
10458 if (err)
10459 goto unlock;
10460
10461 if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10462 if (profile == PLATFORM_PROFILE_BALANCED) {
10463 /*
10464 * To get back to balanced mode we need to issue a reset command.
10465 * Note we still need to disable CQL mode before hand and re-enable
10466 * it afterwards, otherwise dytc_lapmode gets reset to 0 and stays
10467 * stuck at 0 for aprox. 30 minutes.
10468 */
10469 err = dytc_cql_command(DYTC_CMD_RESET, &output);
10470 if (err)
10471 goto unlock;
10472 } else {
10473 /* Determine if we are in CQL mode. This alters the commands we do */
10474 err = dytc_cql_command(DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
10475 &output);
10476 if (err)
10477 goto unlock;
10478 }
10479 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
10480 err = dytc_command(DYTC_SET_COMMAND(DYTC_FUNCTION_PSC, perfmode, 1), &output);
10481 if (err)
10482 goto unlock;
10483
10484 /* system supports AMT, activate it when on balanced */
10485 if (dytc_capabilities & BIT(DYTC_FC_AMT))
10486 dytc_control_amt(profile == PLATFORM_PROFILE_BALANCED);
10487 }
10488 /* Success - update current profile */
10489 dytc_current_profile = profile;
10490 unlock:
10491 mutex_unlock(&dytc_mutex);
10492 return err;
10493 }
10494
dytc_profile_refresh(void)10495 static void dytc_profile_refresh(void)
10496 {
10497 enum platform_profile_option profile;
10498 int output = 0, err = 0;
10499 int perfmode, funcmode = 0;
10500
10501 mutex_lock(&dytc_mutex);
10502 if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10503 if (dytc_mmc_get_available)
10504 err = dytc_command(DYTC_CMD_MMC_GET, &output);
10505 else
10506 err = dytc_cql_command(DYTC_CMD_GET, &output);
10507 funcmode = DYTC_FUNCTION_MMC;
10508 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
10509 err = dytc_command(DYTC_CMD_GET, &output);
10510 /* Check if we are PSC mode, or have AMT enabled */
10511 funcmode = (output >> DYTC_GET_FUNCTION_BIT) & 0xF;
10512 } else { /* Unknown profile mode */
10513 err = -ENODEV;
10514 }
10515 mutex_unlock(&dytc_mutex);
10516 if (err)
10517 return;
10518
10519 perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
10520 err = convert_dytc_to_profile(funcmode, perfmode, &profile);
10521 if (!err && profile != dytc_current_profile) {
10522 dytc_current_profile = profile;
10523 platform_profile_notify();
10524 }
10525 }
10526
10527 static struct platform_profile_handler dytc_profile = {
10528 .profile_get = dytc_profile_get,
10529 .profile_set = dytc_profile_set,
10530 };
10531
tpacpi_dytc_profile_init(struct ibm_init_struct * iibm)10532 static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
10533 {
10534 int err, output;
10535
10536 /* Setup supported modes */
10537 set_bit(PLATFORM_PROFILE_LOW_POWER, dytc_profile.choices);
10538 set_bit(PLATFORM_PROFILE_BALANCED, dytc_profile.choices);
10539 set_bit(PLATFORM_PROFILE_PERFORMANCE, dytc_profile.choices);
10540
10541 err = dytc_command(DYTC_CMD_QUERY, &output);
10542 if (err)
10543 return err;
10544
10545 if (output & BIT(DYTC_QUERY_ENABLE_BIT))
10546 dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
10547
10548 /* Check DYTC is enabled and supports mode setting */
10549 if (dytc_version < 5)
10550 return -ENODEV;
10551
10552 /* Check what capabilities are supported */
10553 err = dytc_command(DYTC_CMD_FUNC_CAP, &dytc_capabilities);
10554 if (err)
10555 return err;
10556
10557 /* Check if user wants to override the profile selection */
10558 if (profile_force) {
10559 switch (profile_force) {
10560 case -1:
10561 dytc_capabilities = 0;
10562 break;
10563 case 1:
10564 dytc_capabilities = BIT(DYTC_FC_MMC);
10565 break;
10566 case 2:
10567 dytc_capabilities = BIT(DYTC_FC_PSC);
10568 break;
10569 }
10570 pr_debug("Profile selection forced: 0x%x\n", dytc_capabilities);
10571 }
10572 if (dytc_capabilities & BIT(DYTC_FC_MMC)) { /* MMC MODE */
10573 pr_debug("MMC is supported\n");
10574 /*
10575 * Check if MMC_GET functionality available
10576 * Version > 6 and return success from MMC_GET command
10577 */
10578 dytc_mmc_get_available = false;
10579 if (dytc_version >= 6) {
10580 err = dytc_command(DYTC_CMD_MMC_GET, &output);
10581 if (!err && ((output & DYTC_ERR_MASK) == DYTC_ERR_SUCCESS))
10582 dytc_mmc_get_available = true;
10583 }
10584 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { /* PSC MODE */
10585 pr_debug("PSC is supported\n");
10586 } else {
10587 dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n");
10588 return -ENODEV;
10589 }
10590
10591 dbg_printk(TPACPI_DBG_INIT,
10592 "DYTC version %d: thermal mode available\n", dytc_version);
10593
10594 /* Create platform_profile structure and register */
10595 err = platform_profile_register(&dytc_profile);
10596 /*
10597 * If for some reason platform_profiles aren't enabled
10598 * don't quit terminally.
10599 */
10600 if (err)
10601 return -ENODEV;
10602
10603 /* Ensure initial values are correct */
10604 dytc_profile_refresh();
10605
10606 /* Workaround for https://bugzilla.kernel.org/show_bug.cgi?id=216347 */
10607 if (dytc_capabilities & BIT(DYTC_FC_PSC))
10608 dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
10609
10610 return 0;
10611 }
10612
dytc_profile_exit(void)10613 static void dytc_profile_exit(void)
10614 {
10615 platform_profile_remove();
10616 }
10617
10618 static struct ibm_struct dytc_profile_driver_data = {
10619 .name = "dytc-profile",
10620 .exit = dytc_profile_exit,
10621 };
10622
10623 /*************************************************************************
10624 * Keyboard language interface
10625 */
10626
10627 struct keyboard_lang_data {
10628 const char *lang_str;
10629 int lang_code;
10630 };
10631
10632 static const struct keyboard_lang_data keyboard_lang_data[] = {
10633 {"be", 0x080c},
10634 {"cz", 0x0405},
10635 {"da", 0x0406},
10636 {"de", 0x0c07},
10637 {"en", 0x0000},
10638 {"es", 0x2c0a},
10639 {"et", 0x0425},
10640 {"fr", 0x040c},
10641 {"fr-ch", 0x100c},
10642 {"hu", 0x040e},
10643 {"it", 0x0410},
10644 {"jp", 0x0411},
10645 {"nl", 0x0413},
10646 {"nn", 0x0414},
10647 {"pl", 0x0415},
10648 {"pt", 0x0816},
10649 {"sl", 0x041b},
10650 {"sv", 0x081d},
10651 {"tr", 0x041f},
10652 };
10653
set_keyboard_lang_command(int command)10654 static int set_keyboard_lang_command(int command)
10655 {
10656 acpi_handle sskl_handle;
10657 int output;
10658
10659 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSKL", &sskl_handle))) {
10660 /* Platform doesn't support SSKL */
10661 return -ENODEV;
10662 }
10663
10664 if (!acpi_evalf(sskl_handle, &output, NULL, "dd", command))
10665 return -EIO;
10666
10667 return 0;
10668 }
10669
get_keyboard_lang(int * output)10670 static int get_keyboard_lang(int *output)
10671 {
10672 acpi_handle gskl_handle;
10673 int kbd_lang;
10674
10675 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSKL", &gskl_handle))) {
10676 /* Platform doesn't support GSKL */
10677 return -ENODEV;
10678 }
10679
10680 if (!acpi_evalf(gskl_handle, &kbd_lang, NULL, "dd", 0x02000000))
10681 return -EIO;
10682
10683 /*
10684 * METHOD_ERR gets returned on devices where there are no special (e.g. '=',
10685 * '(' and ')') keys which use layout dependent key-press emulation.
10686 */
10687 if (kbd_lang & METHOD_ERR)
10688 return -ENODEV;
10689
10690 *output = kbd_lang;
10691
10692 return 0;
10693 }
10694
10695 /* sysfs keyboard language entry */
keyboard_lang_show(struct device * dev,struct device_attribute * attr,char * buf)10696 static ssize_t keyboard_lang_show(struct device *dev,
10697 struct device_attribute *attr,
10698 char *buf)
10699 {
10700 int output, err, i, len = 0;
10701
10702 err = get_keyboard_lang(&output);
10703 if (err)
10704 return err;
10705
10706 for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) {
10707 if (i)
10708 len += sysfs_emit_at(buf, len, "%s", " ");
10709
10710 if (output == keyboard_lang_data[i].lang_code) {
10711 len += sysfs_emit_at(buf, len, "[%s]", keyboard_lang_data[i].lang_str);
10712 } else {
10713 len += sysfs_emit_at(buf, len, "%s", keyboard_lang_data[i].lang_str);
10714 }
10715 }
10716 len += sysfs_emit_at(buf, len, "\n");
10717
10718 return len;
10719 }
10720
keyboard_lang_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)10721 static ssize_t keyboard_lang_store(struct device *dev,
10722 struct device_attribute *attr,
10723 const char *buf, size_t count)
10724 {
10725 int err, i;
10726 bool lang_found = false;
10727 int lang_code = 0;
10728
10729 for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) {
10730 if (sysfs_streq(buf, keyboard_lang_data[i].lang_str)) {
10731 lang_code = keyboard_lang_data[i].lang_code;
10732 lang_found = true;
10733 break;
10734 }
10735 }
10736
10737 if (lang_found) {
10738 lang_code = lang_code | 1 << 24;
10739
10740 /* Set language code */
10741 err = set_keyboard_lang_command(lang_code);
10742 if (err)
10743 return err;
10744 } else {
10745 dev_err(&tpacpi_pdev->dev, "Unknown Keyboard language. Ignoring\n");
10746 return -EINVAL;
10747 }
10748
10749 tpacpi_disclose_usertask(attr->attr.name,
10750 "keyboard language is set to %s\n", buf);
10751
10752 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "keyboard_lang");
10753
10754 return count;
10755 }
10756 static DEVICE_ATTR_RW(keyboard_lang);
10757
10758 static struct attribute *kbdlang_attributes[] = {
10759 &dev_attr_keyboard_lang.attr,
10760 NULL
10761 };
10762
kbdlang_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10763 static umode_t kbdlang_attr_is_visible(struct kobject *kobj,
10764 struct attribute *attr, int n)
10765 {
10766 return tp_features.kbd_lang ? attr->mode : 0;
10767 }
10768
10769 static const struct attribute_group kbdlang_attr_group = {
10770 .is_visible = kbdlang_attr_is_visible,
10771 .attrs = kbdlang_attributes,
10772 };
10773
tpacpi_kbdlang_init(struct ibm_init_struct * iibm)10774 static int tpacpi_kbdlang_init(struct ibm_init_struct *iibm)
10775 {
10776 int err, output;
10777
10778 err = get_keyboard_lang(&output);
10779 tp_features.kbd_lang = !err;
10780 return err;
10781 }
10782
10783 static struct ibm_struct kbdlang_driver_data = {
10784 .name = "kbdlang",
10785 };
10786
10787 /*************************************************************************
10788 * DPRC(Dynamic Power Reduction Control) subdriver, for the Lenovo WWAN
10789 * and WLAN feature.
10790 */
10791 #define DPRC_GET_WWAN_ANTENNA_TYPE 0x40000
10792 #define DPRC_WWAN_ANTENNA_TYPE_A_BIT BIT(4)
10793 #define DPRC_WWAN_ANTENNA_TYPE_B_BIT BIT(8)
10794 static bool has_antennatype;
10795 static int wwan_antennatype;
10796
dprc_command(int command,int * output)10797 static int dprc_command(int command, int *output)
10798 {
10799 acpi_handle dprc_handle;
10800
10801 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DPRC", &dprc_handle))) {
10802 /* Platform doesn't support DPRC */
10803 return -ENODEV;
10804 }
10805
10806 if (!acpi_evalf(dprc_handle, output, NULL, "dd", command))
10807 return -EIO;
10808
10809 /*
10810 * METHOD_ERR gets returned on devices where few commands are not supported
10811 * for example command to get WWAN Antenna type command is not supported on
10812 * some devices.
10813 */
10814 if (*output & METHOD_ERR)
10815 return -ENODEV;
10816
10817 return 0;
10818 }
10819
get_wwan_antenna(int * wwan_antennatype)10820 static int get_wwan_antenna(int *wwan_antennatype)
10821 {
10822 int output, err;
10823
10824 /* Get current Antenna type */
10825 err = dprc_command(DPRC_GET_WWAN_ANTENNA_TYPE, &output);
10826 if (err)
10827 return err;
10828
10829 if (output & DPRC_WWAN_ANTENNA_TYPE_A_BIT)
10830 *wwan_antennatype = 1;
10831 else if (output & DPRC_WWAN_ANTENNA_TYPE_B_BIT)
10832 *wwan_antennatype = 2;
10833 else
10834 return -ENODEV;
10835
10836 return 0;
10837 }
10838
10839 /* sysfs wwan antenna type entry */
wwan_antenna_type_show(struct device * dev,struct device_attribute * attr,char * buf)10840 static ssize_t wwan_antenna_type_show(struct device *dev,
10841 struct device_attribute *attr,
10842 char *buf)
10843 {
10844 switch (wwan_antennatype) {
10845 case 1:
10846 return sysfs_emit(buf, "type a\n");
10847 case 2:
10848 return sysfs_emit(buf, "type b\n");
10849 default:
10850 return -ENODATA;
10851 }
10852 }
10853 static DEVICE_ATTR_RO(wwan_antenna_type);
10854
10855 static struct attribute *dprc_attributes[] = {
10856 &dev_attr_wwan_antenna_type.attr,
10857 NULL
10858 };
10859
dprc_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10860 static umode_t dprc_attr_is_visible(struct kobject *kobj,
10861 struct attribute *attr, int n)
10862 {
10863 return has_antennatype ? attr->mode : 0;
10864 }
10865
10866 static const struct attribute_group dprc_attr_group = {
10867 .is_visible = dprc_attr_is_visible,
10868 .attrs = dprc_attributes,
10869 };
10870
tpacpi_dprc_init(struct ibm_init_struct * iibm)10871 static int tpacpi_dprc_init(struct ibm_init_struct *iibm)
10872 {
10873 int err;
10874
10875 err = get_wwan_antenna(&wwan_antennatype);
10876 if (err)
10877 return err;
10878
10879 has_antennatype = true;
10880 return 0;
10881 }
10882
10883 static struct ibm_struct dprc_driver_data = {
10884 .name = "dprc",
10885 };
10886
10887 /* --------------------------------------------------------------------- */
10888
10889 static struct attribute *tpacpi_driver_attributes[] = {
10890 &driver_attr_debug_level.attr,
10891 &driver_attr_version.attr,
10892 &driver_attr_interface_version.attr,
10893 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10894 &driver_attr_wlsw_emulstate.attr,
10895 &driver_attr_bluetooth_emulstate.attr,
10896 &driver_attr_wwan_emulstate.attr,
10897 &driver_attr_uwb_emulstate.attr,
10898 #endif
10899 NULL
10900 };
10901
10902 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
tpacpi_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10903 static umode_t tpacpi_attr_is_visible(struct kobject *kobj,
10904 struct attribute *attr, int n)
10905 {
10906 if (attr == &driver_attr_wlsw_emulstate.attr) {
10907 if (!dbg_wlswemul)
10908 return 0;
10909 } else if (attr == &driver_attr_bluetooth_emulstate.attr) {
10910 if (!dbg_bluetoothemul)
10911 return 0;
10912 } else if (attr == &driver_attr_wwan_emulstate.attr) {
10913 if (!dbg_wwanemul)
10914 return 0;
10915 } else if (attr == &driver_attr_uwb_emulstate.attr) {
10916 if (!dbg_uwbemul)
10917 return 0;
10918 }
10919
10920 return attr->mode;
10921 }
10922 #endif
10923
10924 static const struct attribute_group tpacpi_driver_attr_group = {
10925 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10926 .is_visible = tpacpi_attr_is_visible,
10927 #endif
10928 .attrs = tpacpi_driver_attributes,
10929 };
10930
10931 static const struct attribute_group *tpacpi_driver_groups[] = {
10932 &tpacpi_driver_attr_group,
10933 NULL,
10934 };
10935
10936 static const struct attribute_group *tpacpi_groups[] = {
10937 &adaptive_kbd_attr_group,
10938 &hotkey_attr_group,
10939 &bluetooth_attr_group,
10940 &wan_attr_group,
10941 &cmos_attr_group,
10942 &proxsensor_attr_group,
10943 &kbdlang_attr_group,
10944 &dprc_attr_group,
10945 NULL,
10946 };
10947
10948 static const struct attribute_group *tpacpi_hwmon_groups[] = {
10949 &thermal_attr_group,
10950 &temp_label_attr_group,
10951 &fan_attr_group,
10952 NULL,
10953 };
10954
10955 static const struct attribute_group *tpacpi_hwmon_driver_groups[] = {
10956 &fan_driver_attr_group,
10957 NULL,
10958 };
10959
10960 /****************************************************************************
10961 ****************************************************************************
10962 *
10963 * Platform drivers
10964 *
10965 ****************************************************************************
10966 ****************************************************************************/
10967
10968 static struct platform_driver tpacpi_pdriver = {
10969 .driver = {
10970 .name = TPACPI_DRVR_NAME,
10971 .pm = &tpacpi_pm,
10972 .groups = tpacpi_driver_groups,
10973 .dev_groups = tpacpi_groups,
10974 },
10975 .shutdown = tpacpi_shutdown_handler,
10976 };
10977
10978 static struct platform_driver tpacpi_hwmon_pdriver = {
10979 .driver = {
10980 .name = TPACPI_HWMON_DRVR_NAME,
10981 .groups = tpacpi_hwmon_driver_groups,
10982 },
10983 };
10984
10985 /****************************************************************************
10986 ****************************************************************************
10987 *
10988 * Infrastructure
10989 *
10990 ****************************************************************************
10991 ****************************************************************************/
10992
10993 /*
10994 * HKEY event callout for other subdrivers go here
10995 * (yes, it is ugly, but it is quick, safe, and gets the job done
10996 */
tpacpi_driver_event(const unsigned int hkey_event)10997 static void tpacpi_driver_event(const unsigned int hkey_event)
10998 {
10999 if (ibm_backlight_device) {
11000 switch (hkey_event) {
11001 case TP_HKEY_EV_BRGHT_UP:
11002 case TP_HKEY_EV_BRGHT_DOWN:
11003 tpacpi_brightness_notify_change();
11004 }
11005 }
11006 if (alsa_card) {
11007 switch (hkey_event) {
11008 case TP_HKEY_EV_VOL_UP:
11009 case TP_HKEY_EV_VOL_DOWN:
11010 case TP_HKEY_EV_VOL_MUTE:
11011 volume_alsa_notify_change();
11012 }
11013 }
11014 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
11015 enum led_brightness brightness;
11016
11017 mutex_lock(&kbdlight_mutex);
11018
11019 /*
11020 * Check the brightness actually changed, setting the brightness
11021 * through kbdlight_set_level() also triggers this event.
11022 */
11023 brightness = kbdlight_sysfs_get(NULL);
11024 if (kbdlight_brightness != brightness) {
11025 kbdlight_brightness = brightness;
11026 led_classdev_notify_brightness_hw_changed(
11027 &tpacpi_led_kbdlight.led_classdev, brightness);
11028 }
11029
11030 mutex_unlock(&kbdlight_mutex);
11031 }
11032
11033 if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED) {
11034 lapsensor_refresh();
11035 /* If we are already accessing DYTC then skip dytc update */
11036 if (!atomic_add_unless(&dytc_ignore_event, -1, 0))
11037 dytc_profile_refresh();
11038 }
11039
11040 if (lcdshadow_dev && hkey_event == TP_HKEY_EV_PRIVACYGUARD_TOGGLE) {
11041 enum drm_privacy_screen_status old_hw_state;
11042 bool changed;
11043
11044 mutex_lock(&lcdshadow_dev->lock);
11045 old_hw_state = lcdshadow_dev->hw_state;
11046 lcdshadow_get_hw_state(lcdshadow_dev);
11047 changed = lcdshadow_dev->hw_state != old_hw_state;
11048 mutex_unlock(&lcdshadow_dev->lock);
11049
11050 if (changed)
11051 drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
11052 }
11053 if (hkey_event == TP_HKEY_EV_AMT_TOGGLE) {
11054 /* If we're enabling AMT we need to force balanced mode */
11055 if (!dytc_amt_active)
11056 /* This will also set AMT mode enabled */
11057 dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
11058 else
11059 dytc_control_amt(!dytc_amt_active);
11060 }
11061
11062 }
11063
hotkey_driver_event(const unsigned int scancode)11064 static void hotkey_driver_event(const unsigned int scancode)
11065 {
11066 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
11067 }
11068
11069 /* --------------------------------------------------------------------- */
11070
11071 /* /proc support */
11072 static struct proc_dir_entry *proc_dir;
11073
11074 /*
11075 * Module and infrastructure proble, init and exit handling
11076 */
11077
11078 static bool force_load;
11079
11080 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
str_supported(int is_supported)11081 static const char * __init str_supported(int is_supported)
11082 {
11083 static char text_unsupported[] __initdata = "not supported";
11084
11085 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
11086 }
11087 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
11088
ibm_exit(struct ibm_struct * ibm)11089 static void ibm_exit(struct ibm_struct *ibm)
11090 {
11091 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
11092
11093 list_del_init(&ibm->all_drivers);
11094
11095 if (ibm->flags.acpi_notify_installed) {
11096 dbg_printk(TPACPI_DBG_EXIT,
11097 "%s: acpi_remove_notify_handler\n", ibm->name);
11098 BUG_ON(!ibm->acpi);
11099 acpi_remove_notify_handler(*ibm->acpi->handle,
11100 ibm->acpi->type,
11101 dispatch_acpi_notify);
11102 ibm->flags.acpi_notify_installed = 0;
11103 }
11104
11105 if (ibm->flags.proc_created) {
11106 dbg_printk(TPACPI_DBG_EXIT,
11107 "%s: remove_proc_entry\n", ibm->name);
11108 remove_proc_entry(ibm->name, proc_dir);
11109 ibm->flags.proc_created = 0;
11110 }
11111
11112 if (ibm->flags.acpi_driver_registered) {
11113 dbg_printk(TPACPI_DBG_EXIT,
11114 "%s: acpi_bus_unregister_driver\n", ibm->name);
11115 BUG_ON(!ibm->acpi);
11116 acpi_bus_unregister_driver(ibm->acpi->driver);
11117 kfree(ibm->acpi->driver);
11118 ibm->acpi->driver = NULL;
11119 ibm->flags.acpi_driver_registered = 0;
11120 }
11121
11122 if (ibm->flags.init_called && ibm->exit) {
11123 ibm->exit();
11124 ibm->flags.init_called = 0;
11125 }
11126
11127 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
11128 }
11129
ibm_init(struct ibm_init_struct * iibm)11130 static int __init ibm_init(struct ibm_init_struct *iibm)
11131 {
11132 int ret;
11133 struct ibm_struct *ibm = iibm->data;
11134 struct proc_dir_entry *entry;
11135
11136 BUG_ON(ibm == NULL);
11137
11138 INIT_LIST_HEAD(&ibm->all_drivers);
11139
11140 if (ibm->flags.experimental && !experimental)
11141 return 0;
11142
11143 dbg_printk(TPACPI_DBG_INIT,
11144 "probing for %s\n", ibm->name);
11145
11146 if (iibm->init) {
11147 ret = iibm->init(iibm);
11148 if (ret > 0 || ret == -ENODEV)
11149 return 0; /* subdriver functionality not available */
11150 if (ret)
11151 return ret;
11152
11153 ibm->flags.init_called = 1;
11154 }
11155
11156 if (ibm->acpi) {
11157 if (ibm->acpi->hid) {
11158 ret = register_tpacpi_subdriver(ibm);
11159 if (ret)
11160 goto err_out;
11161 }
11162
11163 if (ibm->acpi->notify) {
11164 ret = setup_acpi_notify(ibm);
11165 if (ret == -ENODEV) {
11166 pr_notice("disabling subdriver %s\n",
11167 ibm->name);
11168 ret = 0;
11169 goto err_out;
11170 }
11171 if (ret < 0)
11172 goto err_out;
11173 }
11174 }
11175
11176 dbg_printk(TPACPI_DBG_INIT,
11177 "%s installed\n", ibm->name);
11178
11179 if (ibm->read) {
11180 umode_t mode = iibm->base_procfs_mode;
11181
11182 if (!mode)
11183 mode = S_IRUGO;
11184 if (ibm->write)
11185 mode |= S_IWUSR;
11186 entry = proc_create_data(ibm->name, mode, proc_dir,
11187 &dispatch_proc_ops, ibm);
11188 if (!entry) {
11189 pr_err("unable to create proc entry %s\n", ibm->name);
11190 ret = -ENODEV;
11191 goto err_out;
11192 }
11193 ibm->flags.proc_created = 1;
11194 }
11195
11196 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
11197
11198 return 0;
11199
11200 err_out:
11201 dbg_printk(TPACPI_DBG_INIT,
11202 "%s: at error exit path with result %d\n",
11203 ibm->name, ret);
11204
11205 ibm_exit(ibm);
11206 return (ret < 0) ? ret : 0;
11207 }
11208
11209 /* Probing */
11210
tpacpi_parse_fw_id(const char * const s,u32 * model,u16 * release)11211 static char __init tpacpi_parse_fw_id(const char * const s,
11212 u32 *model, u16 *release)
11213 {
11214 int i;
11215
11216 if (!s || strlen(s) < 8)
11217 goto invalid;
11218
11219 for (i = 0; i < 8; i++)
11220 if (!((s[i] >= '0' && s[i] <= '9') ||
11221 (s[i] >= 'A' && s[i] <= 'Z')))
11222 goto invalid;
11223
11224 /*
11225 * Most models: xxyTkkWW (#.##c)
11226 * Ancient 570/600 and -SL lacks (#.##c)
11227 */
11228 if (s[3] == 'T' || s[3] == 'N') {
11229 *model = TPID(s[0], s[1]);
11230 *release = TPVER(s[4], s[5]);
11231 return s[2];
11232
11233 /* New models: xxxyTkkW (#.##c); T550 and some others */
11234 } else if (s[4] == 'T' || s[4] == 'N') {
11235 *model = TPID3(s[0], s[1], s[2]);
11236 *release = TPVER(s[5], s[6]);
11237 return s[3];
11238 }
11239
11240 invalid:
11241 return '\0';
11242 }
11243
find_new_ec_fwstr(const struct dmi_header * dm,void * private)11244 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
11245 {
11246 char *ec_fw_string = (char *) private;
11247 const char *dmi_data = (const char *)dm;
11248 /*
11249 * ThinkPad Embedded Controller Program Table on newer models
11250 *
11251 * Offset | Name | Width | Description
11252 * ----------------------------------------------------
11253 * 0x00 | Type | BYTE | 0x8C
11254 * 0x01 | Length | BYTE |
11255 * 0x02 | Handle | WORD | Varies
11256 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO"
11257 * 0x0A | OEM struct offset | BYTE | 0x0B
11258 * 0x0B | OEM struct number | BYTE | 0x07, for this structure
11259 * 0x0C | OEM struct revision | BYTE | 0x01, for this format
11260 * 0x0D | ECP version ID | STR ID |
11261 * 0x0E | ECP release date | STR ID |
11262 */
11263
11264 /* Return if data structure not match */
11265 if (dm->type != 140 || dm->length < 0x0F ||
11266 memcmp(dmi_data + 4, "LENOVO", 6) != 0 ||
11267 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 ||
11268 dmi_data[0x0C] != 0x01)
11269 return;
11270
11271 /* fwstr is the first 8byte string */
11272 strncpy(ec_fw_string, dmi_data + 0x0F, 8);
11273 }
11274
11275 /* returns 0 - probe ok, or < 0 - probe error.
11276 * Probe ok doesn't mean thinkpad found.
11277 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
get_thinkpad_model_data(struct thinkpad_id_data * tp)11278 static int __must_check __init get_thinkpad_model_data(
11279 struct thinkpad_id_data *tp)
11280 {
11281 const struct dmi_device *dev = NULL;
11282 char ec_fw_string[18] = {0};
11283 char const *s;
11284 char t;
11285
11286 if (!tp)
11287 return -EINVAL;
11288
11289 memset(tp, 0, sizeof(*tp));
11290
11291 if (dmi_name_in_vendors("IBM"))
11292 tp->vendor = PCI_VENDOR_ID_IBM;
11293 else if (dmi_name_in_vendors("LENOVO"))
11294 tp->vendor = PCI_VENDOR_ID_LENOVO;
11295 else
11296 return 0;
11297
11298 s = dmi_get_system_info(DMI_BIOS_VERSION);
11299 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
11300 if (s && !tp->bios_version_str)
11301 return -ENOMEM;
11302
11303 /* Really ancient ThinkPad 240X will fail this, which is fine */
11304 t = tpacpi_parse_fw_id(tp->bios_version_str,
11305 &tp->bios_model, &tp->bios_release);
11306 if (t != 'E' && t != 'C')
11307 return 0;
11308
11309 /*
11310 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
11311 * X32 or newer, all Z series; Some models must have an
11312 * up-to-date BIOS or they will not be detected.
11313 *
11314 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
11315 */
11316 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
11317 if (sscanf(dev->name,
11318 "IBM ThinkPad Embedded Controller -[%17c",
11319 ec_fw_string) == 1) {
11320 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
11321 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
11322 break;
11323 }
11324 }
11325
11326 /* Newer ThinkPads have different EC program info table */
11327 if (!ec_fw_string[0])
11328 dmi_walk(find_new_ec_fwstr, &ec_fw_string);
11329
11330 if (ec_fw_string[0]) {
11331 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
11332 if (!tp->ec_version_str)
11333 return -ENOMEM;
11334
11335 t = tpacpi_parse_fw_id(ec_fw_string,
11336 &tp->ec_model, &tp->ec_release);
11337 if (t != 'H') {
11338 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
11339 ec_fw_string);
11340 pr_notice("please report this to %s\n", TPACPI_MAIL);
11341 }
11342 }
11343
11344 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
11345 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
11346 tp->model_str = kstrdup(s, GFP_KERNEL);
11347 if (!tp->model_str)
11348 return -ENOMEM;
11349 } else {
11350 s = dmi_get_system_info(DMI_BIOS_VENDOR);
11351 if (s && !(strncasecmp(s, "Lenovo", 6))) {
11352 tp->model_str = kstrdup(s, GFP_KERNEL);
11353 if (!tp->model_str)
11354 return -ENOMEM;
11355 }
11356 }
11357
11358 s = dmi_get_system_info(DMI_PRODUCT_NAME);
11359 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
11360 if (s && !tp->nummodel_str)
11361 return -ENOMEM;
11362
11363 return 0;
11364 }
11365
probe_for_thinkpad(void)11366 static int __init probe_for_thinkpad(void)
11367 {
11368 int is_thinkpad;
11369
11370 if (acpi_disabled)
11371 return -ENODEV;
11372
11373 /* It would be dangerous to run the driver in this case */
11374 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
11375 return -ENODEV;
11376
11377 /*
11378 * Non-ancient models have better DMI tagging, but very old models
11379 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
11380 */
11381 is_thinkpad = (thinkpad_id.model_str != NULL) ||
11382 (thinkpad_id.ec_model != 0) ||
11383 tpacpi_is_fw_known();
11384
11385 /* The EC handler is required */
11386 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
11387 if (!ec_handle) {
11388 if (is_thinkpad)
11389 pr_err("Not yet supported ThinkPad detected!\n");
11390 return -ENODEV;
11391 }
11392
11393 if (!is_thinkpad && !force_load)
11394 return -ENODEV;
11395
11396 return 0;
11397 }
11398
thinkpad_acpi_init_banner(void)11399 static void __init thinkpad_acpi_init_banner(void)
11400 {
11401 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
11402 pr_info("%s\n", TPACPI_URL);
11403
11404 pr_info("ThinkPad BIOS %s, EC %s\n",
11405 (thinkpad_id.bios_version_str) ?
11406 thinkpad_id.bios_version_str : "unknown",
11407 (thinkpad_id.ec_version_str) ?
11408 thinkpad_id.ec_version_str : "unknown");
11409
11410 BUG_ON(!thinkpad_id.vendor);
11411
11412 if (thinkpad_id.model_str)
11413 pr_info("%s %s, model %s\n",
11414 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
11415 "IBM" : ((thinkpad_id.vendor ==
11416 PCI_VENDOR_ID_LENOVO) ?
11417 "Lenovo" : "Unknown vendor"),
11418 thinkpad_id.model_str,
11419 (thinkpad_id.nummodel_str) ?
11420 thinkpad_id.nummodel_str : "unknown");
11421 }
11422
11423 /* Module init, exit, parameters */
11424
11425 static struct ibm_init_struct ibms_init[] __initdata = {
11426 {
11427 .data = &thinkpad_acpi_driver_data,
11428 },
11429 {
11430 .init = hotkey_init,
11431 .data = &hotkey_driver_data,
11432 },
11433 {
11434 .init = bluetooth_init,
11435 .data = &bluetooth_driver_data,
11436 },
11437 {
11438 .init = wan_init,
11439 .data = &wan_driver_data,
11440 },
11441 {
11442 .init = uwb_init,
11443 .data = &uwb_driver_data,
11444 },
11445 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
11446 {
11447 .init = video_init,
11448 .base_procfs_mode = S_IRUSR,
11449 .data = &video_driver_data,
11450 },
11451 #endif
11452 {
11453 .init = kbdlight_init,
11454 .data = &kbdlight_driver_data,
11455 },
11456 {
11457 .init = light_init,
11458 .data = &light_driver_data,
11459 },
11460 {
11461 .init = cmos_init,
11462 .data = &cmos_driver_data,
11463 },
11464 {
11465 .init = led_init,
11466 .data = &led_driver_data,
11467 },
11468 {
11469 .init = beep_init,
11470 .data = &beep_driver_data,
11471 },
11472 {
11473 .init = thermal_init,
11474 .data = &thermal_driver_data,
11475 },
11476 {
11477 .init = brightness_init,
11478 .data = &brightness_driver_data,
11479 },
11480 {
11481 .init = volume_init,
11482 .data = &volume_driver_data,
11483 },
11484 {
11485 .init = fan_init,
11486 .data = &fan_driver_data,
11487 },
11488 {
11489 .init = mute_led_init,
11490 .data = &mute_led_driver_data,
11491 },
11492 {
11493 .init = tpacpi_battery_init,
11494 .data = &battery_driver_data,
11495 },
11496 {
11497 .init = tpacpi_lcdshadow_init,
11498 .data = &lcdshadow_driver_data,
11499 },
11500 {
11501 .init = tpacpi_proxsensor_init,
11502 .data = &proxsensor_driver_data,
11503 },
11504 {
11505 .init = tpacpi_dytc_profile_init,
11506 .data = &dytc_profile_driver_data,
11507 },
11508 {
11509 .init = tpacpi_kbdlang_init,
11510 .data = &kbdlang_driver_data,
11511 },
11512 {
11513 .init = tpacpi_dprc_init,
11514 .data = &dprc_driver_data,
11515 },
11516 };
11517
set_ibm_param(const char * val,const struct kernel_param * kp)11518 static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
11519 {
11520 unsigned int i;
11521 struct ibm_struct *ibm;
11522
11523 if (!kp || !kp->name || !val)
11524 return -EINVAL;
11525
11526 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
11527 ibm = ibms_init[i].data;
11528 if (!ibm || !ibm->name)
11529 continue;
11530
11531 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
11532 if (strlen(val) > sizeof(ibms_init[i].param) - 1)
11533 return -ENOSPC;
11534 strcpy(ibms_init[i].param, val);
11535 return 0;
11536 }
11537 }
11538
11539 return -EINVAL;
11540 }
11541
11542 module_param(experimental, int, 0444);
11543 MODULE_PARM_DESC(experimental,
11544 "Enables experimental features when non-zero");
11545
11546 module_param_named(debug, dbg_level, uint, 0);
11547 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
11548
11549 module_param(force_load, bool, 0444);
11550 MODULE_PARM_DESC(force_load,
11551 "Attempts to load the driver even on a mis-identified ThinkPad when true");
11552
11553 module_param_named(fan_control, fan_control_allowed, bool, 0444);
11554 MODULE_PARM_DESC(fan_control,
11555 "Enables setting fan parameters features when true");
11556
11557 module_param_named(brightness_mode, brightness_mode, uint, 0444);
11558 MODULE_PARM_DESC(brightness_mode,
11559 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
11560
11561 module_param(brightness_enable, uint, 0444);
11562 MODULE_PARM_DESC(brightness_enable,
11563 "Enables backlight control when 1, disables when 0");
11564
11565 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
11566 module_param_named(volume_mode, volume_mode, uint, 0444);
11567 MODULE_PARM_DESC(volume_mode,
11568 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
11569
11570 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
11571 MODULE_PARM_DESC(volume_capabilities,
11572 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only");
11573
11574 module_param_named(volume_control, volume_control_allowed, bool, 0444);
11575 MODULE_PARM_DESC(volume_control,
11576 "Enables software override for the console audio control when true");
11577
11578 module_param_named(software_mute, software_mute_requested, bool, 0444);
11579 MODULE_PARM_DESC(software_mute,
11580 "Request full software mute control");
11581
11582 /* ALSA module API parameters */
11583 module_param_named(index, alsa_index, int, 0444);
11584 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
11585 module_param_named(id, alsa_id, charp, 0444);
11586 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
11587 module_param_named(enable, alsa_enable, bool, 0444);
11588 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
11589 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
11590
11591 /* The module parameter can't be read back, that's why 0 is used here */
11592 #define TPACPI_PARAM(feature) \
11593 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
11594 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
11595
11596 TPACPI_PARAM(hotkey);
11597 TPACPI_PARAM(bluetooth);
11598 TPACPI_PARAM(video);
11599 TPACPI_PARAM(light);
11600 TPACPI_PARAM(cmos);
11601 TPACPI_PARAM(led);
11602 TPACPI_PARAM(beep);
11603 TPACPI_PARAM(brightness);
11604 TPACPI_PARAM(volume);
11605 TPACPI_PARAM(fan);
11606
11607 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
11608 module_param(dbg_wlswemul, uint, 0444);
11609 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
11610 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
11611 MODULE_PARM_DESC(wlsw_state,
11612 "Initial state of the emulated WLSW switch");
11613
11614 module_param(dbg_bluetoothemul, uint, 0444);
11615 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
11616 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
11617 MODULE_PARM_DESC(bluetooth_state,
11618 "Initial state of the emulated bluetooth switch");
11619
11620 module_param(dbg_wwanemul, uint, 0444);
11621 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
11622 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
11623 MODULE_PARM_DESC(wwan_state,
11624 "Initial state of the emulated WWAN switch");
11625
11626 module_param(dbg_uwbemul, uint, 0444);
11627 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
11628 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
11629 MODULE_PARM_DESC(uwb_state,
11630 "Initial state of the emulated UWB switch");
11631 #endif
11632
11633 module_param(profile_force, int, 0444);
11634 MODULE_PARM_DESC(profile_force, "Force profile mode. -1=off, 1=MMC, 2=PSC");
11635
thinkpad_acpi_module_exit(void)11636 static void thinkpad_acpi_module_exit(void)
11637 {
11638 struct ibm_struct *ibm, *itmp;
11639
11640 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
11641
11642 if (tpacpi_hwmon)
11643 hwmon_device_unregister(tpacpi_hwmon);
11644 if (tp_features.sensors_pdrv_registered)
11645 platform_driver_unregister(&tpacpi_hwmon_pdriver);
11646 if (tp_features.platform_drv_registered)
11647 platform_driver_unregister(&tpacpi_pdriver);
11648
11649 list_for_each_entry_safe_reverse(ibm, itmp,
11650 &tpacpi_all_drivers,
11651 all_drivers) {
11652 ibm_exit(ibm);
11653 }
11654
11655 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
11656
11657 if (tpacpi_inputdev) {
11658 if (tp_features.input_device_registered)
11659 input_unregister_device(tpacpi_inputdev);
11660 else
11661 input_free_device(tpacpi_inputdev);
11662 kfree(hotkey_keycode_map);
11663 }
11664
11665 if (tpacpi_sensors_pdev)
11666 platform_device_unregister(tpacpi_sensors_pdev);
11667 if (tpacpi_pdev)
11668 platform_device_unregister(tpacpi_pdev);
11669 if (proc_dir)
11670 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
11671 if (tpacpi_wq)
11672 destroy_workqueue(tpacpi_wq);
11673
11674 kfree(thinkpad_id.bios_version_str);
11675 kfree(thinkpad_id.ec_version_str);
11676 kfree(thinkpad_id.model_str);
11677 kfree(thinkpad_id.nummodel_str);
11678 }
11679
11680
thinkpad_acpi_module_init(void)11681 static int __init thinkpad_acpi_module_init(void)
11682 {
11683 const struct dmi_system_id *dmi_id;
11684 int ret, i;
11685 acpi_object_type obj_type;
11686
11687 tpacpi_lifecycle = TPACPI_LIFE_INIT;
11688
11689 /* Driver-level probe */
11690
11691 ret = get_thinkpad_model_data(&thinkpad_id);
11692 if (ret) {
11693 pr_err("unable to get DMI data: %d\n", ret);
11694 thinkpad_acpi_module_exit();
11695 return ret;
11696 }
11697 ret = probe_for_thinkpad();
11698 if (ret) {
11699 thinkpad_acpi_module_exit();
11700 return ret;
11701 }
11702
11703 /* Driver initialization */
11704
11705 thinkpad_acpi_init_banner();
11706 tpacpi_check_outdated_fw();
11707
11708 TPACPI_ACPIHANDLE_INIT(ecrd);
11709 TPACPI_ACPIHANDLE_INIT(ecwr);
11710
11711 /*
11712 * Quirk: in some models (e.g. X380 Yoga), an object named ECRD
11713 * exists, but it is a register, not a method.
11714 */
11715 if (ecrd_handle) {
11716 acpi_get_type(ecrd_handle, &obj_type);
11717 if (obj_type != ACPI_TYPE_METHOD)
11718 ecrd_handle = NULL;
11719 }
11720 if (ecwr_handle) {
11721 acpi_get_type(ecwr_handle, &obj_type);
11722 if (obj_type != ACPI_TYPE_METHOD)
11723 ecwr_handle = NULL;
11724 }
11725
11726 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
11727 if (!tpacpi_wq) {
11728 thinkpad_acpi_module_exit();
11729 return -ENOMEM;
11730 }
11731
11732 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
11733 if (!proc_dir) {
11734 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
11735 thinkpad_acpi_module_exit();
11736 return -ENODEV;
11737 }
11738
11739 dmi_id = dmi_first_match(fwbug_list);
11740 if (dmi_id)
11741 tp_features.quirks = dmi_id->driver_data;
11742
11743 /* Device initialization */
11744 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, PLATFORM_DEVID_NONE,
11745 NULL, 0);
11746 if (IS_ERR(tpacpi_pdev)) {
11747 ret = PTR_ERR(tpacpi_pdev);
11748 tpacpi_pdev = NULL;
11749 pr_err("unable to register platform device\n");
11750 thinkpad_acpi_module_exit();
11751 return ret;
11752 }
11753 tpacpi_sensors_pdev = platform_device_register_simple(
11754 TPACPI_HWMON_DRVR_NAME,
11755 PLATFORM_DEVID_NONE, NULL, 0);
11756 if (IS_ERR(tpacpi_sensors_pdev)) {
11757 ret = PTR_ERR(tpacpi_sensors_pdev);
11758 tpacpi_sensors_pdev = NULL;
11759 pr_err("unable to register hwmon platform device\n");
11760 thinkpad_acpi_module_exit();
11761 return ret;
11762 }
11763
11764 mutex_init(&tpacpi_inputdev_send_mutex);
11765 tpacpi_inputdev = input_allocate_device();
11766 if (!tpacpi_inputdev) {
11767 thinkpad_acpi_module_exit();
11768 return -ENOMEM;
11769 } else {
11770 /* Prepare input device, but don't register */
11771 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
11772 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
11773 tpacpi_inputdev->id.bustype = BUS_HOST;
11774 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
11775 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
11776 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
11777 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
11778 }
11779
11780 /* Init subdriver dependencies */
11781 tpacpi_detect_brightness_capabilities();
11782
11783 /* Init subdrivers */
11784 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
11785 ret = ibm_init(&ibms_init[i]);
11786 if (ret >= 0 && *ibms_init[i].param)
11787 ret = ibms_init[i].data->write(ibms_init[i].param);
11788 if (ret < 0) {
11789 thinkpad_acpi_module_exit();
11790 return ret;
11791 }
11792 }
11793
11794 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
11795
11796 ret = platform_driver_register(&tpacpi_pdriver);
11797 if (ret) {
11798 pr_err("unable to register main platform driver\n");
11799 thinkpad_acpi_module_exit();
11800 return ret;
11801 }
11802 tp_features.platform_drv_registered = 1;
11803
11804 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
11805 if (ret) {
11806 pr_err("unable to register hwmon platform driver\n");
11807 thinkpad_acpi_module_exit();
11808 return ret;
11809 }
11810 tp_features.sensors_pdrv_registered = 1;
11811
11812 tpacpi_hwmon = hwmon_device_register_with_groups(
11813 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, tpacpi_hwmon_groups);
11814 if (IS_ERR(tpacpi_hwmon)) {
11815 ret = PTR_ERR(tpacpi_hwmon);
11816 tpacpi_hwmon = NULL;
11817 pr_err("unable to register hwmon device\n");
11818 thinkpad_acpi_module_exit();
11819 return ret;
11820 }
11821
11822 ret = input_register_device(tpacpi_inputdev);
11823 if (ret < 0) {
11824 pr_err("unable to register input device\n");
11825 thinkpad_acpi_module_exit();
11826 return ret;
11827 } else {
11828 tp_features.input_device_registered = 1;
11829 }
11830
11831 return 0;
11832 }
11833
11834 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
11835
11836 /*
11837 * This will autoload the driver in almost every ThinkPad
11838 * in widespread use.
11839 *
11840 * Only _VERY_ old models, like the 240, 240x and 570 lack
11841 * the HKEY event interface.
11842 */
11843 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
11844
11845 /*
11846 * DMI matching for module autoloading
11847 *
11848 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
11849 * See https://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
11850 *
11851 * Only models listed in thinkwiki will be supported, so add yours
11852 * if it is not there yet.
11853 */
11854 #define IBM_BIOS_MODULE_ALIAS(__type) \
11855 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
11856
11857 /* Ancient thinkpad BIOSes have to be identified by
11858 * BIOS type or model number, and there are far less
11859 * BIOS types than model numbers... */
11860 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
11861
11862 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
11863 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
11864 MODULE_DESCRIPTION(TPACPI_DESC);
11865 MODULE_VERSION(TPACPI_VERSION);
11866 MODULE_LICENSE("GPL");
11867
11868 module_init(thinkpad_acpi_module_init);
11869 module_exit(thinkpad_acpi_module_exit);
11870