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
8017 static struct mutex fan_mutex;
8018
8019 static void fan_watchdog_fire(struct work_struct *ignored);
8020 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
8021
8022 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
8023 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
8024 "\\FSPD", /* 600e/x, 770e, 770x */
8025 ); /* all others */
8026 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
8027 "JFNS", /* 770x-JL */
8028 ); /* all others */
8029
8030 /*
8031 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
8032 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
8033 * be in auto mode (0x80).
8034 *
8035 * This is corrected by any write to HFSP either by the driver, or
8036 * by the firmware.
8037 *
8038 * We assume 0x07 really means auto mode while this quirk is active,
8039 * as this is far more likely than the ThinkPad being in level 7,
8040 * which is only used by the firmware during thermal emergencies.
8041 *
8042 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
8043 * TP-70 (T43, R52), which are known to be buggy.
8044 */
8045
fan_quirk1_setup(void)8046 static void fan_quirk1_setup(void)
8047 {
8048 if (fan_control_initial_status == 0x07) {
8049 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
8050 tp_features.fan_ctrl_status_undef = 1;
8051 }
8052 }
8053
fan_quirk1_handle(u8 * fan_status)8054 static void fan_quirk1_handle(u8 *fan_status)
8055 {
8056 if (unlikely(tp_features.fan_ctrl_status_undef)) {
8057 if (*fan_status != fan_control_initial_status) {
8058 /* something changed the HFSP regisnter since
8059 * driver init time, so it is not undefined
8060 * anymore */
8061 tp_features.fan_ctrl_status_undef = 0;
8062 } else {
8063 /* Return most likely status. In fact, it
8064 * might be the only possible status */
8065 *fan_status = TP_EC_FAN_AUTO;
8066 }
8067 }
8068 }
8069
8070 /* Select main fan on X60/X61, NOOP on others */
fan_select_fan1(void)8071 static bool fan_select_fan1(void)
8072 {
8073 if (tp_features.second_fan) {
8074 u8 val;
8075
8076 if (ec_read(fan_select_offset, &val) < 0)
8077 return false;
8078 val &= 0xFEU;
8079 if (ec_write(fan_select_offset, val) < 0)
8080 return false;
8081 }
8082 return true;
8083 }
8084
8085 /* Select secondary fan on X60/X61 */
fan_select_fan2(void)8086 static bool fan_select_fan2(void)
8087 {
8088 u8 val;
8089
8090 if (!tp_features.second_fan)
8091 return false;
8092
8093 if (ec_read(fan_select_offset, &val) < 0)
8094 return false;
8095 val |= 0x01U;
8096 if (ec_write(fan_select_offset, val) < 0)
8097 return false;
8098
8099 return true;
8100 }
8101
fan_update_desired_level(u8 status)8102 static void fan_update_desired_level(u8 status)
8103 {
8104 lockdep_assert_held(&fan_mutex);
8105
8106 if ((status &
8107 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8108 if (status > 7)
8109 fan_control_desired_level = 7;
8110 else
8111 fan_control_desired_level = status;
8112 }
8113 }
8114
fan_get_status(u8 * status)8115 static int fan_get_status(u8 *status)
8116 {
8117 u8 s;
8118
8119 /* TODO:
8120 * Add TPACPI_FAN_RD_ACPI_FANS ? */
8121
8122 switch (fan_status_access_mode) {
8123 case TPACPI_FAN_RD_ACPI_GFAN: {
8124 /* 570, 600e/x, 770e, 770x */
8125 int res;
8126
8127 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
8128 return -EIO;
8129
8130 if (likely(status))
8131 *status = res & 0x07;
8132
8133 break;
8134 }
8135 case TPACPI_FAN_RD_TPEC:
8136 /* all except 570, 600e/x, 770e, 770x */
8137 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
8138 return -EIO;
8139
8140 if (likely(status)) {
8141 *status = s;
8142 fan_quirk1_handle(status);
8143 }
8144
8145 break;
8146 case TPACPI_FAN_RD_TPEC_NS:
8147 /* Default mode is AUTO which means controlled by EC */
8148 if (!acpi_ec_read(fan_status_offset_ns, &s))
8149 return -EIO;
8150
8151 if (status)
8152 *status = s;
8153
8154 break;
8155
8156 default:
8157 return -ENXIO;
8158 }
8159
8160 return 0;
8161 }
8162
fan_get_status_safe(u8 * status)8163 static int fan_get_status_safe(u8 *status)
8164 {
8165 int rc;
8166 u8 s;
8167
8168 if (mutex_lock_killable(&fan_mutex))
8169 return -ERESTARTSYS;
8170 rc = fan_get_status(&s);
8171 /* NS EC doesn't have register with level settings */
8172 if (!rc && !fan_with_ns_addr)
8173 fan_update_desired_level(s);
8174 mutex_unlock(&fan_mutex);
8175
8176 if (rc)
8177 return rc;
8178 if (status)
8179 *status = s;
8180
8181 return 0;
8182 }
8183
fan_get_speed(unsigned int * speed)8184 static int fan_get_speed(unsigned int *speed)
8185 {
8186 u8 hi, lo;
8187
8188 switch (fan_status_access_mode) {
8189 case TPACPI_FAN_RD_TPEC:
8190 /* all except 570, 600e/x, 770e, 770x */
8191 if (unlikely(!fan_select_fan1()))
8192 return -EIO;
8193 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
8194 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
8195 return -EIO;
8196
8197 if (likely(speed))
8198 *speed = (hi << 8) | lo;
8199 break;
8200 case TPACPI_FAN_RD_TPEC_NS:
8201 if (!acpi_ec_read(fan_rpm_status_ns, &lo))
8202 return -EIO;
8203
8204 if (speed)
8205 *speed = lo ? FAN_RPM_CAL_CONST / lo : 0;
8206 break;
8207
8208 default:
8209 return -ENXIO;
8210 }
8211
8212 return 0;
8213 }
8214
fan2_get_speed(unsigned int * speed)8215 static int fan2_get_speed(unsigned int *speed)
8216 {
8217 u8 hi, lo, status;
8218 bool rc;
8219
8220 switch (fan_status_access_mode) {
8221 case TPACPI_FAN_RD_TPEC:
8222 /* all except 570, 600e/x, 770e, 770x */
8223 if (unlikely(!fan_select_fan2()))
8224 return -EIO;
8225 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8226 !acpi_ec_read(fan_rpm_offset + 1, &hi);
8227 fan_select_fan1(); /* play it safe */
8228 if (rc)
8229 return -EIO;
8230
8231 if (likely(speed))
8232 *speed = (hi << 8) | lo;
8233 break;
8234
8235 case TPACPI_FAN_RD_TPEC_NS:
8236 rc = !acpi_ec_read(fan2_status_offset_ns, &status);
8237 if (rc)
8238 return -EIO;
8239 if (!(status & FAN_NS_CTRL_STATUS)) {
8240 pr_info("secondary fan control not supported\n");
8241 return -EIO;
8242 }
8243 rc = !acpi_ec_read(fan2_rpm_status_ns, &lo);
8244 if (rc)
8245 return -EIO;
8246 if (speed)
8247 *speed = lo ? FAN_RPM_CAL_CONST / lo : 0;
8248 break;
8249
8250 default:
8251 return -ENXIO;
8252 }
8253
8254 return 0;
8255 }
8256
fan_set_level(int level)8257 static int fan_set_level(int level)
8258 {
8259 if (!fan_control_allowed)
8260 return -EPERM;
8261
8262 switch (fan_control_access_mode) {
8263 case TPACPI_FAN_WR_ACPI_SFAN:
8264 if ((level < 0) || (level > 7))
8265 return -EINVAL;
8266
8267 if (tp_features.second_fan_ctl) {
8268 if (!fan_select_fan2() ||
8269 !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) {
8270 pr_warn("Couldn't set 2nd fan level, disabling support\n");
8271 tp_features.second_fan_ctl = 0;
8272 }
8273 fan_select_fan1();
8274 }
8275 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8276 return -EIO;
8277 break;
8278
8279 case TPACPI_FAN_WR_ACPI_FANS:
8280 case TPACPI_FAN_WR_TPEC:
8281 if (!(level & TP_EC_FAN_AUTO) &&
8282 !(level & TP_EC_FAN_FULLSPEED) &&
8283 ((level < 0) || (level > 7)))
8284 return -EINVAL;
8285
8286 /* safety net should the EC not support AUTO
8287 * or FULLSPEED mode bits and just ignore them */
8288 if (level & TP_EC_FAN_FULLSPEED)
8289 level |= 7; /* safety min speed 7 */
8290 else if (level & TP_EC_FAN_AUTO)
8291 level |= 4; /* safety min speed 4 */
8292
8293 if (tp_features.second_fan_ctl) {
8294 if (!fan_select_fan2() ||
8295 !acpi_ec_write(fan_status_offset, level)) {
8296 pr_warn("Couldn't set 2nd fan level, disabling support\n");
8297 tp_features.second_fan_ctl = 0;
8298 }
8299 fan_select_fan1();
8300
8301 }
8302 if (!acpi_ec_write(fan_status_offset, level))
8303 return -EIO;
8304 else
8305 tp_features.fan_ctrl_status_undef = 0;
8306 break;
8307
8308 default:
8309 return -ENXIO;
8310 }
8311
8312 vdbg_printk(TPACPI_DBG_FAN,
8313 "fan control: set fan control register to 0x%02x\n", level);
8314 return 0;
8315 }
8316
fan_set_level_safe(int level)8317 static int fan_set_level_safe(int level)
8318 {
8319 int rc;
8320
8321 if (!fan_control_allowed)
8322 return -EPERM;
8323
8324 if (mutex_lock_killable(&fan_mutex))
8325 return -ERESTARTSYS;
8326
8327 if (level == TPACPI_FAN_LAST_LEVEL)
8328 level = fan_control_desired_level;
8329
8330 rc = fan_set_level(level);
8331 if (!rc)
8332 fan_update_desired_level(level);
8333
8334 mutex_unlock(&fan_mutex);
8335 return rc;
8336 }
8337
fan_set_enable(void)8338 static int fan_set_enable(void)
8339 {
8340 u8 s;
8341 int rc;
8342
8343 if (!fan_control_allowed)
8344 return -EPERM;
8345
8346 if (mutex_lock_killable(&fan_mutex))
8347 return -ERESTARTSYS;
8348
8349 switch (fan_control_access_mode) {
8350 case TPACPI_FAN_WR_ACPI_FANS:
8351 case TPACPI_FAN_WR_TPEC:
8352 rc = fan_get_status(&s);
8353 if (rc)
8354 break;
8355
8356 /* Don't go out of emergency fan mode */
8357 if (s != 7) {
8358 s &= 0x07;
8359 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8360 }
8361
8362 if (!acpi_ec_write(fan_status_offset, s))
8363 rc = -EIO;
8364 else {
8365 tp_features.fan_ctrl_status_undef = 0;
8366 rc = 0;
8367 }
8368 break;
8369
8370 case TPACPI_FAN_WR_ACPI_SFAN:
8371 rc = fan_get_status(&s);
8372 if (rc)
8373 break;
8374
8375 s &= 0x07;
8376
8377 /* Set fan to at least level 4 */
8378 s |= 4;
8379
8380 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8381 rc = -EIO;
8382 else
8383 rc = 0;
8384 break;
8385
8386 default:
8387 rc = -ENXIO;
8388 }
8389
8390 mutex_unlock(&fan_mutex);
8391
8392 if (!rc)
8393 vdbg_printk(TPACPI_DBG_FAN,
8394 "fan control: set fan control register to 0x%02x\n",
8395 s);
8396 return rc;
8397 }
8398
fan_set_disable(void)8399 static int fan_set_disable(void)
8400 {
8401 int rc;
8402
8403 if (!fan_control_allowed)
8404 return -EPERM;
8405
8406 if (mutex_lock_killable(&fan_mutex))
8407 return -ERESTARTSYS;
8408
8409 rc = 0;
8410 switch (fan_control_access_mode) {
8411 case TPACPI_FAN_WR_ACPI_FANS:
8412 case TPACPI_FAN_WR_TPEC:
8413 if (!acpi_ec_write(fan_status_offset, 0x00))
8414 rc = -EIO;
8415 else {
8416 fan_control_desired_level = 0;
8417 tp_features.fan_ctrl_status_undef = 0;
8418 }
8419 break;
8420
8421 case TPACPI_FAN_WR_ACPI_SFAN:
8422 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8423 rc = -EIO;
8424 else
8425 fan_control_desired_level = 0;
8426 break;
8427
8428 default:
8429 rc = -ENXIO;
8430 }
8431
8432 if (!rc)
8433 vdbg_printk(TPACPI_DBG_FAN,
8434 "fan control: set fan control register to 0\n");
8435
8436 mutex_unlock(&fan_mutex);
8437 return rc;
8438 }
8439
fan_set_speed(int speed)8440 static int fan_set_speed(int speed)
8441 {
8442 int rc;
8443
8444 if (!fan_control_allowed)
8445 return -EPERM;
8446
8447 if (mutex_lock_killable(&fan_mutex))
8448 return -ERESTARTSYS;
8449
8450 rc = 0;
8451 switch (fan_control_access_mode) {
8452 case TPACPI_FAN_WR_ACPI_FANS:
8453 if (speed >= 0 && speed <= 65535) {
8454 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8455 speed, speed, speed))
8456 rc = -EIO;
8457 } else
8458 rc = -EINVAL;
8459 break;
8460
8461 default:
8462 rc = -ENXIO;
8463 }
8464
8465 mutex_unlock(&fan_mutex);
8466 return rc;
8467 }
8468
fan_watchdog_reset(void)8469 static void fan_watchdog_reset(void)
8470 {
8471 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8472 return;
8473
8474 if (fan_watchdog_maxinterval > 0 &&
8475 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8476 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8477 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8478 else
8479 cancel_delayed_work(&fan_watchdog_task);
8480 }
8481
fan_watchdog_fire(struct work_struct * ignored)8482 static void fan_watchdog_fire(struct work_struct *ignored)
8483 {
8484 int rc;
8485
8486 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8487 return;
8488
8489 pr_notice("fan watchdog: enabling fan\n");
8490 rc = fan_set_enable();
8491 if (rc < 0) {
8492 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
8493 rc);
8494 /* reschedule for later */
8495 fan_watchdog_reset();
8496 }
8497 }
8498
8499 /*
8500 * SYSFS fan layout: hwmon compatible (device)
8501 *
8502 * pwm*_enable:
8503 * 0: "disengaged" mode
8504 * 1: manual mode
8505 * 2: native EC "auto" mode (recommended, hardware default)
8506 *
8507 * pwm*: set speed in manual mode, ignored otherwise.
8508 * 0 is level 0; 255 is level 7. Intermediate points done with linear
8509 * interpolation.
8510 *
8511 * fan*_input: tachometer reading, RPM
8512 *
8513 *
8514 * SYSFS fan layout: extensions
8515 *
8516 * fan_watchdog (driver):
8517 * fan watchdog interval in seconds, 0 disables (default), max 120
8518 */
8519
8520 /* sysfs fan pwm1_enable ----------------------------------------------- */
fan_pwm1_enable_show(struct device * dev,struct device_attribute * attr,char * buf)8521 static ssize_t fan_pwm1_enable_show(struct device *dev,
8522 struct device_attribute *attr,
8523 char *buf)
8524 {
8525 int res, mode;
8526 u8 status;
8527
8528 res = fan_get_status_safe(&status);
8529 if (res)
8530 return res;
8531
8532 if (status & TP_EC_FAN_FULLSPEED) {
8533 mode = 0;
8534 } else if (status & TP_EC_FAN_AUTO) {
8535 mode = 2;
8536 } else
8537 mode = 1;
8538
8539 return sysfs_emit(buf, "%d\n", mode);
8540 }
8541
fan_pwm1_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)8542 static ssize_t fan_pwm1_enable_store(struct device *dev,
8543 struct device_attribute *attr,
8544 const char *buf, size_t count)
8545 {
8546 unsigned long t;
8547 int res, level;
8548
8549 if (parse_strtoul(buf, 2, &t))
8550 return -EINVAL;
8551
8552 tpacpi_disclose_usertask("hwmon pwm1_enable",
8553 "set fan mode to %lu\n", t);
8554
8555 switch (t) {
8556 case 0:
8557 level = TP_EC_FAN_FULLSPEED;
8558 break;
8559 case 1:
8560 level = TPACPI_FAN_LAST_LEVEL;
8561 break;
8562 case 2:
8563 level = TP_EC_FAN_AUTO;
8564 break;
8565 case 3:
8566 /* reserved for software-controlled auto mode */
8567 return -ENOSYS;
8568 default:
8569 return -EINVAL;
8570 }
8571
8572 res = fan_set_level_safe(level);
8573 if (res == -ENXIO)
8574 return -EINVAL;
8575 else if (res < 0)
8576 return res;
8577
8578 fan_watchdog_reset();
8579
8580 return count;
8581 }
8582
8583 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8584 fan_pwm1_enable_show, fan_pwm1_enable_store);
8585
8586 /* sysfs fan pwm1 ------------------------------------------------------ */
fan_pwm1_show(struct device * dev,struct device_attribute * attr,char * buf)8587 static ssize_t fan_pwm1_show(struct device *dev,
8588 struct device_attribute *attr,
8589 char *buf)
8590 {
8591 int res;
8592 u8 status;
8593
8594 res = fan_get_status_safe(&status);
8595 if (res)
8596 return res;
8597
8598 if ((status &
8599 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8600 status = fan_control_desired_level;
8601
8602 if (status > 7)
8603 status = 7;
8604
8605 return sysfs_emit(buf, "%u\n", (status * 255) / 7);
8606 }
8607
fan_pwm1_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)8608 static ssize_t fan_pwm1_store(struct device *dev,
8609 struct device_attribute *attr,
8610 const char *buf, size_t count)
8611 {
8612 unsigned long s;
8613 int rc;
8614 u8 status, newlevel;
8615
8616 if (parse_strtoul(buf, 255, &s))
8617 return -EINVAL;
8618
8619 tpacpi_disclose_usertask("hwmon pwm1",
8620 "set fan speed to %lu\n", s);
8621
8622 /* scale down from 0-255 to 0-7 */
8623 newlevel = (s >> 5) & 0x07;
8624
8625 if (mutex_lock_killable(&fan_mutex))
8626 return -ERESTARTSYS;
8627
8628 rc = fan_get_status(&status);
8629 if (!rc && (status &
8630 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8631 rc = fan_set_level(newlevel);
8632 if (rc == -ENXIO)
8633 rc = -EINVAL;
8634 else if (!rc) {
8635 fan_update_desired_level(newlevel);
8636 fan_watchdog_reset();
8637 }
8638 }
8639
8640 mutex_unlock(&fan_mutex);
8641 return (rc) ? rc : count;
8642 }
8643
8644 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8645
8646 /* sysfs fan fan1_input ------------------------------------------------ */
fan_fan1_input_show(struct device * dev,struct device_attribute * attr,char * buf)8647 static ssize_t fan_fan1_input_show(struct device *dev,
8648 struct device_attribute *attr,
8649 char *buf)
8650 {
8651 int res;
8652 unsigned int speed;
8653
8654 res = fan_get_speed(&speed);
8655 if (res < 0)
8656 return res;
8657
8658 return sysfs_emit(buf, "%u\n", speed);
8659 }
8660
8661 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8662
8663 /* sysfs fan fan2_input ------------------------------------------------ */
fan_fan2_input_show(struct device * dev,struct device_attribute * attr,char * buf)8664 static ssize_t fan_fan2_input_show(struct device *dev,
8665 struct device_attribute *attr,
8666 char *buf)
8667 {
8668 int res;
8669 unsigned int speed;
8670
8671 res = fan2_get_speed(&speed);
8672 if (res < 0)
8673 return res;
8674
8675 return sysfs_emit(buf, "%u\n", speed);
8676 }
8677
8678 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8679
8680 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
fan_watchdog_show(struct device_driver * drv,char * buf)8681 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
8682 {
8683 return sysfs_emit(buf, "%u\n", fan_watchdog_maxinterval);
8684 }
8685
fan_watchdog_store(struct device_driver * drv,const char * buf,size_t count)8686 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
8687 size_t count)
8688 {
8689 unsigned long t;
8690
8691 if (parse_strtoul(buf, 120, &t))
8692 return -EINVAL;
8693
8694 if (!fan_control_allowed)
8695 return -EPERM;
8696
8697 fan_watchdog_maxinterval = t;
8698 fan_watchdog_reset();
8699
8700 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8701
8702 return count;
8703 }
8704 static DRIVER_ATTR_RW(fan_watchdog);
8705
8706 /* --------------------------------------------------------------------- */
8707
8708 static struct attribute *fan_attributes[] = {
8709 &dev_attr_pwm1_enable.attr,
8710 &dev_attr_pwm1.attr,
8711 &dev_attr_fan1_input.attr,
8712 &dev_attr_fan2_input.attr,
8713 NULL
8714 };
8715
fan_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)8716 static umode_t fan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
8717 int n)
8718 {
8719 if (fan_status_access_mode == TPACPI_FAN_NONE &&
8720 fan_control_access_mode == TPACPI_FAN_WR_NONE)
8721 return 0;
8722
8723 if (attr == &dev_attr_fan2_input.attr) {
8724 if (!tp_features.second_fan)
8725 return 0;
8726 }
8727
8728 return attr->mode;
8729 }
8730
8731 static const struct attribute_group fan_attr_group = {
8732 .is_visible = fan_attr_is_visible,
8733 .attrs = fan_attributes,
8734 };
8735
8736 static struct attribute *fan_driver_attributes[] = {
8737 &driver_attr_fan_watchdog.attr,
8738 NULL
8739 };
8740
8741 static const struct attribute_group fan_driver_attr_group = {
8742 .is_visible = fan_attr_is_visible,
8743 .attrs = fan_driver_attributes,
8744 };
8745
8746 #define TPACPI_FAN_Q1 0x0001 /* Uninitialized HFSP */
8747 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
8748 #define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */
8749 #define TPACPI_FAN_NOFAN 0x0008 /* no fan available */
8750 #define TPACPI_FAN_NS 0x0010 /* For EC with non-Standard register addresses */
8751
8752 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8753 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
8754 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1),
8755 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
8756 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
8757 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN),
8758 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN),
8759 TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL), /* P70 */
8760 TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL), /* P50 */
8761 TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL), /* P71 */
8762 TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL), /* P51 */
8763 TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL), /* P52 / P72 */
8764 TPACPI_Q_LNV3('N', '2', 'N', TPACPI_FAN_2CTL), /* P53 / P73 */
8765 TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (1st gen) */
8766 TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (2nd gen) */
8767 TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL), /* P15 (1st gen) / P15v (1st gen) */
8768 TPACPI_Q_LNV3('N', '3', '7', TPACPI_FAN_2CTL), /* T15g (2nd gen) */
8769 TPACPI_Q_LNV3('R', '1', 'F', TPACPI_FAN_NS), /* L13 Yoga Gen 2 */
8770 TPACPI_Q_LNV3('N', '2', 'U', TPACPI_FAN_NS), /* X13 Yoga Gen 2*/
8771 TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN), /* X1 Tablet (2nd gen) */
8772 };
8773
fan_init(struct ibm_init_struct * iibm)8774 static int __init fan_init(struct ibm_init_struct *iibm)
8775 {
8776 unsigned long quirks;
8777
8778 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8779 "initializing fan subdriver\n");
8780
8781 mutex_init(&fan_mutex);
8782 fan_status_access_mode = TPACPI_FAN_NONE;
8783 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8784 fan_control_commands = 0;
8785 fan_watchdog_maxinterval = 0;
8786 tp_features.fan_ctrl_status_undef = 0;
8787 tp_features.second_fan = 0;
8788 tp_features.second_fan_ctl = 0;
8789 fan_control_desired_level = 7;
8790
8791 if (tpacpi_is_ibm()) {
8792 TPACPI_ACPIHANDLE_INIT(fans);
8793 TPACPI_ACPIHANDLE_INIT(gfan);
8794 TPACPI_ACPIHANDLE_INIT(sfan);
8795 }
8796
8797 quirks = tpacpi_check_quirks(fan_quirk_table,
8798 ARRAY_SIZE(fan_quirk_table));
8799
8800 if (quirks & TPACPI_FAN_NOFAN) {
8801 pr_info("No integrated ThinkPad fan available\n");
8802 return -ENODEV;
8803 }
8804
8805 if (quirks & TPACPI_FAN_NS) {
8806 pr_info("ECFW with non-standard fan reg control found\n");
8807 fan_with_ns_addr = 1;
8808 /* Fan ctrl support from host is undefined for now */
8809 tp_features.fan_ctrl_status_undef = 1;
8810 }
8811
8812 if (gfan_handle) {
8813 /* 570, 600e/x, 770e, 770x */
8814 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8815 } else {
8816 /* all other ThinkPads: note that even old-style
8817 * ThinkPad ECs supports the fan control register */
8818 if (fan_with_ns_addr ||
8819 likely(acpi_ec_read(fan_status_offset, &fan_control_initial_status))) {
8820 int res;
8821 unsigned int speed;
8822
8823 fan_status_access_mode = fan_with_ns_addr ?
8824 TPACPI_FAN_RD_TPEC_NS : TPACPI_FAN_RD_TPEC;
8825
8826 if (quirks & TPACPI_FAN_Q1)
8827 fan_quirk1_setup();
8828 /* Try and probe the 2nd fan */
8829 tp_features.second_fan = 1; /* needed for get_speed to work */
8830 res = fan2_get_speed(&speed);
8831 if (res >= 0 && speed != FAN_NOT_PRESENT) {
8832 /* It responded - so let's assume it's there */
8833 tp_features.second_fan = 1;
8834 /* fan control not currently available for ns ECFW */
8835 tp_features.second_fan_ctl = !fan_with_ns_addr;
8836 pr_info("secondary fan control detected & enabled\n");
8837 } else {
8838 /* Fan not auto-detected */
8839 tp_features.second_fan = 0;
8840 if (quirks & TPACPI_FAN_2FAN) {
8841 tp_features.second_fan = 1;
8842 pr_info("secondary fan support enabled\n");
8843 }
8844 if (quirks & TPACPI_FAN_2CTL) {
8845 tp_features.second_fan = 1;
8846 tp_features.second_fan_ctl = 1;
8847 pr_info("secondary fan control enabled\n");
8848 }
8849 }
8850 } else {
8851 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
8852 return -ENODEV;
8853 }
8854 }
8855
8856 if (sfan_handle) {
8857 /* 570, 770x-JL */
8858 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8859 fan_control_commands |=
8860 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8861 } else {
8862 if (!gfan_handle) {
8863 /* gfan without sfan means no fan control */
8864 /* all other models implement TP EC 0x2f control */
8865
8866 if (fans_handle) {
8867 /* X31, X40, X41 */
8868 fan_control_access_mode =
8869 TPACPI_FAN_WR_ACPI_FANS;
8870 fan_control_commands |=
8871 TPACPI_FAN_CMD_SPEED |
8872 TPACPI_FAN_CMD_LEVEL |
8873 TPACPI_FAN_CMD_ENABLE;
8874 } else {
8875 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8876 fan_control_commands |=
8877 TPACPI_FAN_CMD_LEVEL |
8878 TPACPI_FAN_CMD_ENABLE;
8879 }
8880 }
8881 }
8882
8883 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8884 "fan is %s, modes %d, %d\n",
8885 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8886 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8887 fan_status_access_mode, fan_control_access_mode);
8888
8889 /* fan control master switch */
8890 if (!fan_control_allowed) {
8891 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8892 fan_control_commands = 0;
8893 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8894 "fan control features disabled by parameter\n");
8895 }
8896
8897 /* update fan_control_desired_level */
8898 if (fan_status_access_mode != TPACPI_FAN_NONE)
8899 fan_get_status_safe(NULL);
8900
8901 if (fan_status_access_mode == TPACPI_FAN_NONE &&
8902 fan_control_access_mode == TPACPI_FAN_WR_NONE)
8903 return -ENODEV;
8904
8905 return 0;
8906 }
8907
fan_exit(void)8908 static void fan_exit(void)
8909 {
8910 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8911 "cancelling any pending fan watchdog tasks\n");
8912
8913 cancel_delayed_work(&fan_watchdog_task);
8914 flush_workqueue(tpacpi_wq);
8915 }
8916
fan_suspend(void)8917 static void fan_suspend(void)
8918 {
8919 int rc;
8920
8921 if (!fan_control_allowed)
8922 return;
8923
8924 /* Store fan status in cache */
8925 fan_control_resume_level = 0;
8926 rc = fan_get_status_safe(&fan_control_resume_level);
8927 if (rc)
8928 pr_notice("failed to read fan level for later restore during resume: %d\n",
8929 rc);
8930
8931 /* if it is undefined, don't attempt to restore it.
8932 * KEEP THIS LAST */
8933 if (tp_features.fan_ctrl_status_undef)
8934 fan_control_resume_level = 0;
8935 }
8936
fan_resume(void)8937 static void fan_resume(void)
8938 {
8939 u8 current_level = 7;
8940 bool do_set = false;
8941 int rc;
8942
8943 /* DSDT *always* updates status on resume */
8944 tp_features.fan_ctrl_status_undef = 0;
8945
8946 if (!fan_control_allowed ||
8947 !fan_control_resume_level ||
8948 fan_get_status_safe(¤t_level))
8949 return;
8950
8951 switch (fan_control_access_mode) {
8952 case TPACPI_FAN_WR_ACPI_SFAN:
8953 /* never decrease fan level */
8954 do_set = (fan_control_resume_level > current_level);
8955 break;
8956 case TPACPI_FAN_WR_ACPI_FANS:
8957 case TPACPI_FAN_WR_TPEC:
8958 /* never decrease fan level, scale is:
8959 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8960 *
8961 * We expect the firmware to set either 7 or AUTO, but we
8962 * handle FULLSPEED out of paranoia.
8963 *
8964 * So, we can safely only restore FULLSPEED or 7, anything
8965 * else could slow the fan. Restoring AUTO is useless, at
8966 * best that's exactly what the DSDT already set (it is the
8967 * slower it uses).
8968 *
8969 * Always keep in mind that the DSDT *will* have set the
8970 * fans to what the vendor supposes is the best level. We
8971 * muck with it only to speed the fan up.
8972 */
8973 if (fan_control_resume_level != 7 &&
8974 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8975 return;
8976 else
8977 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8978 (current_level != fan_control_resume_level);
8979 break;
8980 default:
8981 return;
8982 }
8983 if (do_set) {
8984 pr_notice("restoring fan level to 0x%02x\n",
8985 fan_control_resume_level);
8986 rc = fan_set_level_safe(fan_control_resume_level);
8987 if (rc < 0)
8988 pr_notice("failed to restore fan level: %d\n", rc);
8989 }
8990 }
8991
fan_read(struct seq_file * m)8992 static int fan_read(struct seq_file *m)
8993 {
8994 int rc;
8995 u8 status;
8996 unsigned int speed = 0;
8997
8998 switch (fan_status_access_mode) {
8999 case TPACPI_FAN_RD_ACPI_GFAN:
9000 /* 570, 600e/x, 770e, 770x */
9001 rc = fan_get_status_safe(&status);
9002 if (rc)
9003 return rc;
9004
9005 seq_printf(m, "status:\t\t%s\n"
9006 "level:\t\t%d\n",
9007 str_enabled_disabled(status), status);
9008 break;
9009
9010 case TPACPI_FAN_RD_TPEC_NS:
9011 case TPACPI_FAN_RD_TPEC:
9012 /* all except 570, 600e/x, 770e, 770x */
9013 rc = fan_get_status_safe(&status);
9014 if (rc)
9015 return rc;
9016
9017 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status));
9018
9019 rc = fan_get_speed(&speed);
9020 if (rc < 0)
9021 return rc;
9022
9023 seq_printf(m, "speed:\t\t%d\n", speed);
9024
9025 if (fan_status_access_mode == TPACPI_FAN_RD_TPEC_NS) {
9026 /*
9027 * No full speed bit in NS EC
9028 * EC Auto mode is set by default.
9029 * No other levels settings available
9030 */
9031 seq_printf(m, "level:\t\t%s\n", status & FAN_NS_CTRL ? "unknown" : "auto");
9032 } else {
9033 if (status & TP_EC_FAN_FULLSPEED)
9034 /* Disengaged mode takes precedence */
9035 seq_printf(m, "level:\t\tdisengaged\n");
9036 else if (status & TP_EC_FAN_AUTO)
9037 seq_printf(m, "level:\t\tauto\n");
9038 else
9039 seq_printf(m, "level:\t\t%d\n", status);
9040 }
9041 break;
9042
9043 case TPACPI_FAN_NONE:
9044 default:
9045 seq_printf(m, "status:\t\tnot supported\n");
9046 }
9047
9048 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
9049 seq_printf(m, "commands:\tlevel <level>");
9050
9051 switch (fan_control_access_mode) {
9052 case TPACPI_FAN_WR_ACPI_SFAN:
9053 seq_printf(m, " (<level> is 0-7)\n");
9054 break;
9055
9056 default:
9057 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
9058 break;
9059 }
9060 }
9061
9062 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
9063 seq_printf(m, "commands:\tenable, disable\n"
9064 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
9065
9066 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
9067 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
9068
9069 return 0;
9070 }
9071
fan_write_cmd_level(const char * cmd,int * rc)9072 static int fan_write_cmd_level(const char *cmd, int *rc)
9073 {
9074 int level;
9075
9076 if (strstarts(cmd, "level auto"))
9077 level = TP_EC_FAN_AUTO;
9078 else if (strstarts(cmd, "level disengaged") || strstarts(cmd, "level full-speed"))
9079 level = TP_EC_FAN_FULLSPEED;
9080 else if (sscanf(cmd, "level %d", &level) != 1)
9081 return 0;
9082
9083 *rc = fan_set_level_safe(level);
9084 if (*rc == -ENXIO)
9085 pr_err("level command accepted for unsupported access mode %d\n",
9086 fan_control_access_mode);
9087 else if (!*rc)
9088 tpacpi_disclose_usertask("procfs fan",
9089 "set level to %d\n", level);
9090
9091 return 1;
9092 }
9093
fan_write_cmd_enable(const char * cmd,int * rc)9094 static int fan_write_cmd_enable(const char *cmd, int *rc)
9095 {
9096 if (!strstarts(cmd, "enable"))
9097 return 0;
9098
9099 *rc = fan_set_enable();
9100 if (*rc == -ENXIO)
9101 pr_err("enable command accepted for unsupported access mode %d\n",
9102 fan_control_access_mode);
9103 else if (!*rc)
9104 tpacpi_disclose_usertask("procfs fan", "enable\n");
9105
9106 return 1;
9107 }
9108
fan_write_cmd_disable(const char * cmd,int * rc)9109 static int fan_write_cmd_disable(const char *cmd, int *rc)
9110 {
9111 if (!strstarts(cmd, "disable"))
9112 return 0;
9113
9114 *rc = fan_set_disable();
9115 if (*rc == -ENXIO)
9116 pr_err("disable command accepted for unsupported access mode %d\n",
9117 fan_control_access_mode);
9118 else if (!*rc)
9119 tpacpi_disclose_usertask("procfs fan", "disable\n");
9120
9121 return 1;
9122 }
9123
fan_write_cmd_speed(const char * cmd,int * rc)9124 static int fan_write_cmd_speed(const char *cmd, int *rc)
9125 {
9126 int speed;
9127
9128 /* TODO:
9129 * Support speed <low> <medium> <high> ? */
9130
9131 if (sscanf(cmd, "speed %d", &speed) != 1)
9132 return 0;
9133
9134 *rc = fan_set_speed(speed);
9135 if (*rc == -ENXIO)
9136 pr_err("speed command accepted for unsupported access mode %d\n",
9137 fan_control_access_mode);
9138 else if (!*rc)
9139 tpacpi_disclose_usertask("procfs fan",
9140 "set speed to %d\n", speed);
9141
9142 return 1;
9143 }
9144
fan_write_cmd_watchdog(const char * cmd,int * rc)9145 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
9146 {
9147 int interval;
9148
9149 if (sscanf(cmd, "watchdog %d", &interval) != 1)
9150 return 0;
9151
9152 if (interval < 0 || interval > 120)
9153 *rc = -EINVAL;
9154 else {
9155 fan_watchdog_maxinterval = interval;
9156 tpacpi_disclose_usertask("procfs fan",
9157 "set watchdog timer to %d\n",
9158 interval);
9159 }
9160
9161 return 1;
9162 }
9163
fan_write(char * buf)9164 static int fan_write(char *buf)
9165 {
9166 char *cmd;
9167 int rc = 0;
9168
9169 while (!rc && (cmd = strsep(&buf, ","))) {
9170 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
9171 fan_write_cmd_level(cmd, &rc)) &&
9172 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
9173 (fan_write_cmd_enable(cmd, &rc) ||
9174 fan_write_cmd_disable(cmd, &rc) ||
9175 fan_write_cmd_watchdog(cmd, &rc))) &&
9176 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
9177 fan_write_cmd_speed(cmd, &rc))
9178 )
9179 rc = -EINVAL;
9180 else if (!rc)
9181 fan_watchdog_reset();
9182 }
9183
9184 return rc;
9185 }
9186
9187 static struct ibm_struct fan_driver_data = {
9188 .name = "fan",
9189 .read = fan_read,
9190 .write = fan_write,
9191 .exit = fan_exit,
9192 .suspend = fan_suspend,
9193 .resume = fan_resume,
9194 };
9195
9196 /*************************************************************************
9197 * Mute LED subdriver
9198 */
9199
9200 #define TPACPI_LED_MAX 2
9201
9202 struct tp_led_table {
9203 acpi_string name;
9204 int on_value;
9205 int off_value;
9206 int state;
9207 };
9208
9209 static struct tp_led_table led_tables[TPACPI_LED_MAX] = {
9210 [LED_AUDIO_MUTE] = {
9211 .name = "SSMS",
9212 .on_value = 1,
9213 .off_value = 0,
9214 },
9215 [LED_AUDIO_MICMUTE] = {
9216 .name = "MMTS",
9217 .on_value = 2,
9218 .off_value = 0,
9219 },
9220 };
9221
mute_led_on_off(struct tp_led_table * t,bool state)9222 static int mute_led_on_off(struct tp_led_table *t, bool state)
9223 {
9224 acpi_handle temp;
9225 int output;
9226
9227 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9228 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
9229 return -EIO;
9230 }
9231
9232 if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
9233 state ? t->on_value : t->off_value))
9234 return -EIO;
9235
9236 t->state = state;
9237 return state;
9238 }
9239
tpacpi_led_set(int whichled,bool on)9240 static int tpacpi_led_set(int whichled, bool on)
9241 {
9242 struct tp_led_table *t;
9243
9244 t = &led_tables[whichled];
9245 if (t->state < 0 || t->state == on)
9246 return t->state;
9247 return mute_led_on_off(t, on);
9248 }
9249
tpacpi_led_mute_set(struct led_classdev * led_cdev,enum led_brightness brightness)9250 static int tpacpi_led_mute_set(struct led_classdev *led_cdev,
9251 enum led_brightness brightness)
9252 {
9253 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF);
9254 }
9255
tpacpi_led_micmute_set(struct led_classdev * led_cdev,enum led_brightness brightness)9256 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev,
9257 enum led_brightness brightness)
9258 {
9259 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF);
9260 }
9261
9262 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = {
9263 [LED_AUDIO_MUTE] = {
9264 .name = "platform::mute",
9265 .max_brightness = 1,
9266 .brightness_set_blocking = tpacpi_led_mute_set,
9267 .default_trigger = "audio-mute",
9268 },
9269 [LED_AUDIO_MICMUTE] = {
9270 .name = "platform::micmute",
9271 .max_brightness = 1,
9272 .brightness_set_blocking = tpacpi_led_micmute_set,
9273 .default_trigger = "audio-micmute",
9274 },
9275 };
9276
mute_led_init(struct ibm_init_struct * iibm)9277 static int mute_led_init(struct ibm_init_struct *iibm)
9278 {
9279 acpi_handle temp;
9280 int i, err;
9281
9282 for (i = 0; i < TPACPI_LED_MAX; i++) {
9283 struct tp_led_table *t = &led_tables[i];
9284 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9285 t->state = -ENODEV;
9286 continue;
9287 }
9288
9289 mute_led_cdev[i].brightness = ledtrig_audio_get(i);
9290 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]);
9291 if (err < 0) {
9292 while (i--)
9293 led_classdev_unregister(&mute_led_cdev[i]);
9294 return err;
9295 }
9296 }
9297 return 0;
9298 }
9299
mute_led_exit(void)9300 static void mute_led_exit(void)
9301 {
9302 int i;
9303
9304 for (i = 0; i < TPACPI_LED_MAX; i++) {
9305 led_classdev_unregister(&mute_led_cdev[i]);
9306 tpacpi_led_set(i, false);
9307 }
9308 }
9309
mute_led_resume(void)9310 static void mute_led_resume(void)
9311 {
9312 int i;
9313
9314 for (i = 0; i < TPACPI_LED_MAX; i++) {
9315 struct tp_led_table *t = &led_tables[i];
9316 if (t->state >= 0)
9317 mute_led_on_off(t, t->state);
9318 }
9319 }
9320
9321 static struct ibm_struct mute_led_driver_data = {
9322 .name = "mute_led",
9323 .exit = mute_led_exit,
9324 .resume = mute_led_resume,
9325 };
9326
9327 /*
9328 * Battery Wear Control Driver
9329 * Contact: Ognjen Galic <smclt30p@gmail.com>
9330 */
9331
9332 /* Metadata */
9333
9334 #define GET_START "BCTG"
9335 #define SET_START "BCCS"
9336 #define GET_STOP "BCSG"
9337 #define SET_STOP "BCSS"
9338 #define GET_DISCHARGE "BDSG"
9339 #define SET_DISCHARGE "BDSS"
9340 #define GET_INHIBIT "BICG"
9341 #define SET_INHIBIT "BICS"
9342
9343 enum {
9344 BAT_ANY = 0,
9345 BAT_PRIMARY = 1,
9346 BAT_SECONDARY = 2
9347 };
9348
9349 enum {
9350 /* Error condition bit */
9351 METHOD_ERR = BIT(31),
9352 };
9353
9354 enum {
9355 /* This is used in the get/set helpers */
9356 THRESHOLD_START,
9357 THRESHOLD_STOP,
9358 FORCE_DISCHARGE,
9359 INHIBIT_CHARGE,
9360 };
9361
9362 struct tpacpi_battery_data {
9363 int charge_start;
9364 int start_support;
9365 int charge_stop;
9366 int stop_support;
9367 unsigned int charge_behaviours;
9368 };
9369
9370 struct tpacpi_battery_driver_data {
9371 struct tpacpi_battery_data batteries[3];
9372 int individual_addressing;
9373 };
9374
9375 static struct tpacpi_battery_driver_data battery_info;
9376
9377 /* ACPI helpers/functions/probes */
9378
9379 /**
9380 * This evaluates a ACPI method call specific to the battery
9381 * ACPI extension. The specifics are that an error is marked
9382 * in the 32rd bit of the response, so we just check that here.
9383 */
tpacpi_battery_acpi_eval(char * method,int * ret,int param)9384 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param)
9385 {
9386 int response;
9387
9388 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) {
9389 acpi_handle_err(hkey_handle, "%s: evaluate failed", method);
9390 return AE_ERROR;
9391 }
9392 if (response & METHOD_ERR) {
9393 acpi_handle_err(hkey_handle,
9394 "%s evaluated but flagged as error", method);
9395 return AE_ERROR;
9396 }
9397 *ret = response;
9398 return AE_OK;
9399 }
9400
tpacpi_battery_get(int what,int battery,int * ret)9401 static int tpacpi_battery_get(int what, int battery, int *ret)
9402 {
9403 switch (what) {
9404 case THRESHOLD_START:
9405 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery))
9406 return -ENODEV;
9407
9408 /* The value is in the low 8 bits of the response */
9409 *ret = *ret & 0xFF;
9410 return 0;
9411 case THRESHOLD_STOP:
9412 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery))
9413 return -ENODEV;
9414 /* Value is in lower 8 bits */
9415 *ret = *ret & 0xFF;
9416 /*
9417 * On the stop value, if we return 0 that
9418 * does not make any sense. 0 means Default, which
9419 * means that charging stops at 100%, so we return
9420 * that.
9421 */
9422 if (*ret == 0)
9423 *ret = 100;
9424 return 0;
9425 case FORCE_DISCHARGE:
9426 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, ret, battery))
9427 return -ENODEV;
9428 /* The force discharge status is in bit 0 */
9429 *ret = *ret & 0x01;
9430 return 0;
9431 case INHIBIT_CHARGE:
9432 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, ret, battery))
9433 return -ENODEV;
9434 /* The inhibit charge status is in bit 0 */
9435 *ret = *ret & 0x01;
9436 return 0;
9437 default:
9438 pr_crit("wrong parameter: %d", what);
9439 return -EINVAL;
9440 }
9441 }
9442
tpacpi_battery_set(int what,int battery,int value)9443 static int tpacpi_battery_set(int what, int battery, int value)
9444 {
9445 int param, ret;
9446 /* The first 8 bits are the value of the threshold */
9447 param = value;
9448 /* The battery ID is in bits 8-9, 2 bits */
9449 param |= battery << 8;
9450
9451 switch (what) {
9452 case THRESHOLD_START:
9453 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) {
9454 pr_err("failed to set charge threshold on battery %d",
9455 battery);
9456 return -ENODEV;
9457 }
9458 return 0;
9459 case THRESHOLD_STOP:
9460 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) {
9461 pr_err("failed to set stop threshold: %d", battery);
9462 return -ENODEV;
9463 }
9464 return 0;
9465 case FORCE_DISCHARGE:
9466 /* Force discharge is in bit 0,
9467 * break on AC attach is in bit 1 (won't work on some ThinkPads),
9468 * battery ID is in bits 8-9, 2 bits.
9469 */
9470 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_DISCHARGE, &ret, param))) {
9471 pr_err("failed to set force discharge on %d", battery);
9472 return -ENODEV;
9473 }
9474 return 0;
9475 case INHIBIT_CHARGE:
9476 /* When setting inhibit charge, we set a default value of
9477 * always breaking on AC detach and the effective time is set to
9478 * be permanent.
9479 * The battery ID is in bits 4-5, 2 bits,
9480 * the effective time is in bits 8-23, 2 bytes.
9481 * A time of FFFF indicates forever.
9482 */
9483 param = value;
9484 param |= battery << 4;
9485 param |= 0xFFFF << 8;
9486 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_INHIBIT, &ret, param))) {
9487 pr_err("failed to set inhibit charge on %d", battery);
9488 return -ENODEV;
9489 }
9490 return 0;
9491 default:
9492 pr_crit("wrong parameter: %d", what);
9493 return -EINVAL;
9494 }
9495 }
9496
tpacpi_battery_set_validate(int what,int battery,int value)9497 static int tpacpi_battery_set_validate(int what, int battery, int value)
9498 {
9499 int ret, v;
9500
9501 ret = tpacpi_battery_set(what, battery, value);
9502 if (ret < 0)
9503 return ret;
9504
9505 ret = tpacpi_battery_get(what, battery, &v);
9506 if (ret < 0)
9507 return ret;
9508
9509 if (v == value)
9510 return 0;
9511
9512 msleep(500);
9513
9514 ret = tpacpi_battery_get(what, battery, &v);
9515 if (ret < 0)
9516 return ret;
9517
9518 if (v == value)
9519 return 0;
9520
9521 return -EIO;
9522 }
9523
tpacpi_battery_probe(int battery)9524 static int tpacpi_battery_probe(int battery)
9525 {
9526 int ret = 0;
9527
9528 memset(&battery_info.batteries[battery], 0,
9529 sizeof(battery_info.batteries[battery]));
9530
9531 /*
9532 * 1) Get the current start threshold
9533 * 2) Check for support
9534 * 3) Get the current stop threshold
9535 * 4) Check for support
9536 * 5) Get the current force discharge status
9537 * 6) Check for support
9538 * 7) Get the current inhibit charge status
9539 * 8) Check for support
9540 */
9541 if (acpi_has_method(hkey_handle, GET_START)) {
9542 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
9543 pr_err("Error probing battery %d\n", battery);
9544 return -ENODEV;
9545 }
9546 /* Individual addressing is in bit 9 */
9547 if (ret & BIT(9))
9548 battery_info.individual_addressing = true;
9549 /* Support is marked in bit 8 */
9550 if (ret & BIT(8))
9551 battery_info.batteries[battery].start_support = 1;
9552 else
9553 return -ENODEV;
9554 if (tpacpi_battery_get(THRESHOLD_START, battery,
9555 &battery_info.batteries[battery].charge_start)) {
9556 pr_err("Error probing battery %d\n", battery);
9557 return -ENODEV;
9558 }
9559 }
9560 if (acpi_has_method(hkey_handle, GET_STOP)) {
9561 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) {
9562 pr_err("Error probing battery stop; %d\n", battery);
9563 return -ENODEV;
9564 }
9565 /* Support is marked in bit 8 */
9566 if (ret & BIT(8))
9567 battery_info.batteries[battery].stop_support = 1;
9568 else
9569 return -ENODEV;
9570 if (tpacpi_battery_get(THRESHOLD_STOP, battery,
9571 &battery_info.batteries[battery].charge_stop)) {
9572 pr_err("Error probing battery stop: %d\n", battery);
9573 return -ENODEV;
9574 }
9575 }
9576 if (acpi_has_method(hkey_handle, GET_DISCHARGE)) {
9577 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, &ret, battery))) {
9578 pr_err("Error probing battery discharge; %d\n", battery);
9579 return -ENODEV;
9580 }
9581 /* Support is marked in bit 8 */
9582 if (ret & BIT(8))
9583 battery_info.batteries[battery].charge_behaviours |=
9584 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE);
9585 }
9586 if (acpi_has_method(hkey_handle, GET_INHIBIT)) {
9587 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, &ret, battery))) {
9588 pr_err("Error probing battery inhibit charge; %d\n", battery);
9589 return -ENODEV;
9590 }
9591 /* Support is marked in bit 5 */
9592 if (ret & BIT(5))
9593 battery_info.batteries[battery].charge_behaviours |=
9594 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE);
9595 }
9596
9597 battery_info.batteries[battery].charge_behaviours |=
9598 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO);
9599
9600 pr_info("battery %d registered (start %d, stop %d, behaviours: 0x%x)\n",
9601 battery,
9602 battery_info.batteries[battery].charge_start,
9603 battery_info.batteries[battery].charge_stop,
9604 battery_info.batteries[battery].charge_behaviours);
9605
9606 return 0;
9607 }
9608
9609 /* General helper functions */
9610
tpacpi_battery_get_id(const char * battery_name)9611 static int tpacpi_battery_get_id(const char *battery_name)
9612 {
9613
9614 if (strcmp(battery_name, "BAT0") == 0 ||
9615 tp_features.battery_force_primary)
9616 return BAT_PRIMARY;
9617 if (strcmp(battery_name, "BAT1") == 0)
9618 return BAT_SECONDARY;
9619 /*
9620 * If for some reason the battery is not BAT0 nor is it
9621 * BAT1, we will assume it's the default, first battery,
9622 * AKA primary.
9623 */
9624 pr_warn("unknown battery %s, assuming primary", battery_name);
9625 return BAT_PRIMARY;
9626 }
9627
9628 /* sysfs interface */
9629
tpacpi_battery_store(int what,struct device * dev,const char * buf,size_t count)9630 static ssize_t tpacpi_battery_store(int what,
9631 struct device *dev,
9632 const char *buf, size_t count)
9633 {
9634 struct power_supply *supply = to_power_supply(dev);
9635 unsigned long value;
9636 int battery, rval;
9637 /*
9638 * Some systems have support for more than
9639 * one battery. If that is the case,
9640 * tpacpi_battery_probe marked that addressing
9641 * them individually is supported, so we do that
9642 * based on the device struct.
9643 *
9644 * On systems that are not supported, we assume
9645 * the primary as most of the ACPI calls fail
9646 * with "Any Battery" as the parameter.
9647 */
9648 if (battery_info.individual_addressing)
9649 /* BAT_PRIMARY or BAT_SECONDARY */
9650 battery = tpacpi_battery_get_id(supply->desc->name);
9651 else
9652 battery = BAT_PRIMARY;
9653
9654 rval = kstrtoul(buf, 10, &value);
9655 if (rval)
9656 return rval;
9657
9658 switch (what) {
9659 case THRESHOLD_START:
9660 if (!battery_info.batteries[battery].start_support)
9661 return -ENODEV;
9662 /* valid values are [0, 99] */
9663 if (value > 99)
9664 return -EINVAL;
9665 if (value > battery_info.batteries[battery].charge_stop)
9666 return -EINVAL;
9667 if (tpacpi_battery_set(THRESHOLD_START, battery, value))
9668 return -ENODEV;
9669 battery_info.batteries[battery].charge_start = value;
9670 return count;
9671
9672 case THRESHOLD_STOP:
9673 if (!battery_info.batteries[battery].stop_support)
9674 return -ENODEV;
9675 /* valid values are [1, 100] */
9676 if (value < 1 || value > 100)
9677 return -EINVAL;
9678 if (value < battery_info.batteries[battery].charge_start)
9679 return -EINVAL;
9680 battery_info.batteries[battery].charge_stop = value;
9681 /*
9682 * When 100 is passed to stop, we need to flip
9683 * it to 0 as that the EC understands that as
9684 * "Default", which will charge to 100%
9685 */
9686 if (value == 100)
9687 value = 0;
9688 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value))
9689 return -EINVAL;
9690 return count;
9691 default:
9692 pr_crit("Wrong parameter: %d", what);
9693 return -EINVAL;
9694 }
9695 return count;
9696 }
9697
tpacpi_battery_show(int what,struct device * dev,char * buf)9698 static ssize_t tpacpi_battery_show(int what,
9699 struct device *dev,
9700 char *buf)
9701 {
9702 struct power_supply *supply = to_power_supply(dev);
9703 int ret, battery;
9704 /*
9705 * Some systems have support for more than
9706 * one battery. If that is the case,
9707 * tpacpi_battery_probe marked that addressing
9708 * them individually is supported, so we;
9709 * based on the device struct.
9710 *
9711 * On systems that are not supported, we assume
9712 * the primary as most of the ACPI calls fail
9713 * with "Any Battery" as the parameter.
9714 */
9715 if (battery_info.individual_addressing)
9716 /* BAT_PRIMARY or BAT_SECONDARY */
9717 battery = tpacpi_battery_get_id(supply->desc->name);
9718 else
9719 battery = BAT_PRIMARY;
9720 if (tpacpi_battery_get(what, battery, &ret))
9721 return -ENODEV;
9722 return sprintf(buf, "%d\n", ret);
9723 }
9724
charge_control_start_threshold_show(struct device * device,struct device_attribute * attr,char * buf)9725 static ssize_t charge_control_start_threshold_show(struct device *device,
9726 struct device_attribute *attr,
9727 char *buf)
9728 {
9729 return tpacpi_battery_show(THRESHOLD_START, device, buf);
9730 }
9731
charge_control_end_threshold_show(struct device * device,struct device_attribute * attr,char * buf)9732 static ssize_t charge_control_end_threshold_show(struct device *device,
9733 struct device_attribute *attr,
9734 char *buf)
9735 {
9736 return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
9737 }
9738
charge_behaviour_show(struct device * dev,struct device_attribute * attr,char * buf)9739 static ssize_t charge_behaviour_show(struct device *dev,
9740 struct device_attribute *attr,
9741 char *buf)
9742 {
9743 enum power_supply_charge_behaviour active = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO;
9744 struct power_supply *supply = to_power_supply(dev);
9745 unsigned int available;
9746 int ret, battery;
9747
9748 battery = tpacpi_battery_get_id(supply->desc->name);
9749 available = battery_info.batteries[battery].charge_behaviours;
9750
9751 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) {
9752 if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret))
9753 return -ENODEV;
9754 if (ret) {
9755 active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE;
9756 goto out;
9757 }
9758 }
9759
9760 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) {
9761 if (tpacpi_battery_get(INHIBIT_CHARGE, battery, &ret))
9762 return -ENODEV;
9763 if (ret) {
9764 active = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE;
9765 goto out;
9766 }
9767 }
9768
9769 out:
9770 return power_supply_charge_behaviour_show(dev, available, active, buf);
9771 }
9772
charge_control_start_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9773 static ssize_t charge_control_start_threshold_store(struct device *dev,
9774 struct device_attribute *attr,
9775 const char *buf, size_t count)
9776 {
9777 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count);
9778 }
9779
charge_control_end_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9780 static ssize_t charge_control_end_threshold_store(struct device *dev,
9781 struct device_attribute *attr,
9782 const char *buf, size_t count)
9783 {
9784 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
9785 }
9786
charge_behaviour_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9787 static ssize_t charge_behaviour_store(struct device *dev,
9788 struct device_attribute *attr,
9789 const char *buf, size_t count)
9790 {
9791 struct power_supply *supply = to_power_supply(dev);
9792 int selected, battery, ret = 0;
9793 unsigned int available;
9794
9795 battery = tpacpi_battery_get_id(supply->desc->name);
9796 available = battery_info.batteries[battery].charge_behaviours;
9797 selected = power_supply_charge_behaviour_parse(available, buf);
9798
9799 if (selected < 0)
9800 return selected;
9801
9802 switch (selected) {
9803 case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO:
9804 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
9805 ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
9806 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
9807 ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0));
9808 if (ret < 0)
9809 return ret;
9810 break;
9811 case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE:
9812 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
9813 ret = tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0);
9814 ret = min(ret, tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1));
9815 if (ret < 0)
9816 return ret;
9817 break;
9818 case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE:
9819 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
9820 ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
9821 ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 1));
9822 if (ret < 0)
9823 return ret;
9824 break;
9825 default:
9826 dev_err(dev, "Unexpected charge behaviour: %d\n", selected);
9827 return -EINVAL;
9828 }
9829
9830 return count;
9831 }
9832
9833 static DEVICE_ATTR_RW(charge_control_start_threshold);
9834 static DEVICE_ATTR_RW(charge_control_end_threshold);
9835 static DEVICE_ATTR_RW(charge_behaviour);
9836 static struct device_attribute dev_attr_charge_start_threshold = __ATTR(
9837 charge_start_threshold,
9838 0644,
9839 charge_control_start_threshold_show,
9840 charge_control_start_threshold_store
9841 );
9842 static struct device_attribute dev_attr_charge_stop_threshold = __ATTR(
9843 charge_stop_threshold,
9844 0644,
9845 charge_control_end_threshold_show,
9846 charge_control_end_threshold_store
9847 );
9848
9849 static struct attribute *tpacpi_battery_attrs[] = {
9850 &dev_attr_charge_control_start_threshold.attr,
9851 &dev_attr_charge_control_end_threshold.attr,
9852 &dev_attr_charge_start_threshold.attr,
9853 &dev_attr_charge_stop_threshold.attr,
9854 &dev_attr_charge_behaviour.attr,
9855 NULL,
9856 };
9857
9858 ATTRIBUTE_GROUPS(tpacpi_battery);
9859
9860 /* ACPI battery hooking */
9861
tpacpi_battery_add(struct power_supply * battery,struct acpi_battery_hook * hook)9862 static int tpacpi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
9863 {
9864 int batteryid = tpacpi_battery_get_id(battery->desc->name);
9865
9866 if (tpacpi_battery_probe(batteryid))
9867 return -ENODEV;
9868 if (device_add_groups(&battery->dev, tpacpi_battery_groups))
9869 return -ENODEV;
9870 return 0;
9871 }
9872
tpacpi_battery_remove(struct power_supply * battery,struct acpi_battery_hook * hook)9873 static int tpacpi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
9874 {
9875 device_remove_groups(&battery->dev, tpacpi_battery_groups);
9876 return 0;
9877 }
9878
9879 static struct acpi_battery_hook battery_hook = {
9880 .add_battery = tpacpi_battery_add,
9881 .remove_battery = tpacpi_battery_remove,
9882 .name = "ThinkPad Battery Extension",
9883 };
9884
9885 /* Subdriver init/exit */
9886
9887 static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
9888 /*
9889 * Individual addressing is broken on models that expose the
9890 * primary battery as BAT1.
9891 */
9892 TPACPI_Q_LNV('8', 'F', true), /* Thinkpad X120e */
9893 TPACPI_Q_LNV('J', '7', true), /* B5400 */
9894 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */
9895 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
9896 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
9897 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
9898 TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */
9899 };
9900
tpacpi_battery_init(struct ibm_init_struct * ibm)9901 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
9902 {
9903 memset(&battery_info, 0, sizeof(battery_info));
9904
9905 tp_features.battery_force_primary = tpacpi_check_quirks(
9906 battery_quirk_table,
9907 ARRAY_SIZE(battery_quirk_table));
9908
9909 battery_hook_register(&battery_hook);
9910 return 0;
9911 }
9912
tpacpi_battery_exit(void)9913 static void tpacpi_battery_exit(void)
9914 {
9915 battery_hook_unregister(&battery_hook);
9916 }
9917
9918 static struct ibm_struct battery_driver_data = {
9919 .name = "battery",
9920 .exit = tpacpi_battery_exit,
9921 };
9922
9923 /*************************************************************************
9924 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature
9925 */
9926
9927 static struct drm_privacy_screen *lcdshadow_dev;
9928 static acpi_handle lcdshadow_get_handle;
9929 static acpi_handle lcdshadow_set_handle;
9930
lcdshadow_set_sw_state(struct drm_privacy_screen * priv,enum drm_privacy_screen_status state)9931 static int lcdshadow_set_sw_state(struct drm_privacy_screen *priv,
9932 enum drm_privacy_screen_status state)
9933 {
9934 int output;
9935
9936 if (WARN_ON(!mutex_is_locked(&priv->lock)))
9937 return -EIO;
9938
9939 if (!acpi_evalf(lcdshadow_set_handle, &output, NULL, "dd", (int)state))
9940 return -EIO;
9941
9942 priv->hw_state = priv->sw_state = state;
9943 return 0;
9944 }
9945
lcdshadow_get_hw_state(struct drm_privacy_screen * priv)9946 static void lcdshadow_get_hw_state(struct drm_privacy_screen *priv)
9947 {
9948 int output;
9949
9950 if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0))
9951 return;
9952
9953 priv->hw_state = priv->sw_state = output & 0x1;
9954 }
9955
9956 static const struct drm_privacy_screen_ops lcdshadow_ops = {
9957 .set_sw_state = lcdshadow_set_sw_state,
9958 .get_hw_state = lcdshadow_get_hw_state,
9959 };
9960
tpacpi_lcdshadow_init(struct ibm_init_struct * iibm)9961 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm)
9962 {
9963 acpi_status status1, status2;
9964 int output;
9965
9966 status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle);
9967 status2 = acpi_get_handle(hkey_handle, "SSSS", &lcdshadow_set_handle);
9968 if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2))
9969 return 0;
9970
9971 if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0))
9972 return -EIO;
9973
9974 if (!(output & 0x10000))
9975 return 0;
9976
9977 lcdshadow_dev = drm_privacy_screen_register(&tpacpi_pdev->dev,
9978 &lcdshadow_ops, NULL);
9979 if (IS_ERR(lcdshadow_dev))
9980 return PTR_ERR(lcdshadow_dev);
9981
9982 return 0;
9983 }
9984
lcdshadow_exit(void)9985 static void lcdshadow_exit(void)
9986 {
9987 drm_privacy_screen_unregister(lcdshadow_dev);
9988 }
9989
lcdshadow_resume(void)9990 static void lcdshadow_resume(void)
9991 {
9992 if (!lcdshadow_dev)
9993 return;
9994
9995 mutex_lock(&lcdshadow_dev->lock);
9996 lcdshadow_set_sw_state(lcdshadow_dev, lcdshadow_dev->sw_state);
9997 mutex_unlock(&lcdshadow_dev->lock);
9998 }
9999
lcdshadow_read(struct seq_file * m)10000 static int lcdshadow_read(struct seq_file *m)
10001 {
10002 if (!lcdshadow_dev) {
10003 seq_puts(m, "status:\t\tnot supported\n");
10004 } else {
10005 seq_printf(m, "status:\t\t%d\n", lcdshadow_dev->hw_state);
10006 seq_puts(m, "commands:\t0, 1\n");
10007 }
10008
10009 return 0;
10010 }
10011
lcdshadow_write(char * buf)10012 static int lcdshadow_write(char *buf)
10013 {
10014 char *cmd;
10015 int res, state = -EINVAL;
10016
10017 if (!lcdshadow_dev)
10018 return -ENODEV;
10019
10020 while ((cmd = strsep(&buf, ","))) {
10021 res = kstrtoint(cmd, 10, &state);
10022 if (res < 0)
10023 return res;
10024 }
10025
10026 if (state >= 2 || state < 0)
10027 return -EINVAL;
10028
10029 mutex_lock(&lcdshadow_dev->lock);
10030 res = lcdshadow_set_sw_state(lcdshadow_dev, state);
10031 mutex_unlock(&lcdshadow_dev->lock);
10032
10033 drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
10034
10035 return res;
10036 }
10037
10038 static struct ibm_struct lcdshadow_driver_data = {
10039 .name = "lcdshadow",
10040 .exit = lcdshadow_exit,
10041 .resume = lcdshadow_resume,
10042 .read = lcdshadow_read,
10043 .write = lcdshadow_write,
10044 };
10045
10046 /*************************************************************************
10047 * Thinkpad sensor interfaces
10048 */
10049
10050 #define DYTC_CMD_QUERY 0 /* To get DYTC status - enable/revision */
10051 #define DYTC_QUERY_ENABLE_BIT 8 /* Bit 8 - 0 = disabled, 1 = enabled */
10052 #define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */
10053 #define DYTC_QUERY_REV_BIT 28 /* Bits 28 - 31 - revision */
10054
10055 #define DYTC_CMD_GET 2 /* To get current IC function and mode */
10056 #define DYTC_GET_LAPMODE_BIT 17 /* Set when in lapmode */
10057
10058 #define PALMSENSOR_PRESENT_BIT 0 /* Determine if psensor present */
10059 #define PALMSENSOR_ON_BIT 1 /* psensor status */
10060
10061 static bool has_palmsensor;
10062 static bool has_lapsensor;
10063 static bool palm_state;
10064 static bool lap_state;
10065 static int dytc_version;
10066
dytc_command(int command,int * output)10067 static int dytc_command(int command, int *output)
10068 {
10069 acpi_handle dytc_handle;
10070
10071 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DYTC", &dytc_handle))) {
10072 /* Platform doesn't support DYTC */
10073 return -ENODEV;
10074 }
10075 if (!acpi_evalf(dytc_handle, output, NULL, "dd", command))
10076 return -EIO;
10077 return 0;
10078 }
10079
lapsensor_get(bool * present,bool * state)10080 static int lapsensor_get(bool *present, bool *state)
10081 {
10082 int output, err;
10083
10084 *present = false;
10085 err = dytc_command(DYTC_CMD_GET, &output);
10086 if (err)
10087 return err;
10088
10089 *present = true; /*If we get his far, we have lapmode support*/
10090 *state = output & BIT(DYTC_GET_LAPMODE_BIT) ? true : false;
10091 return 0;
10092 }
10093
palmsensor_get(bool * present,bool * state)10094 static int palmsensor_get(bool *present, bool *state)
10095 {
10096 acpi_handle psensor_handle;
10097 int output;
10098
10099 *present = false;
10100 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GPSS", &psensor_handle)))
10101 return -ENODEV;
10102 if (!acpi_evalf(psensor_handle, &output, NULL, "d"))
10103 return -EIO;
10104
10105 *present = output & BIT(PALMSENSOR_PRESENT_BIT) ? true : false;
10106 *state = output & BIT(PALMSENSOR_ON_BIT) ? true : false;
10107 return 0;
10108 }
10109
lapsensor_refresh(void)10110 static void lapsensor_refresh(void)
10111 {
10112 bool state;
10113 int err;
10114
10115 if (has_lapsensor) {
10116 err = lapsensor_get(&has_lapsensor, &state);
10117 if (err)
10118 return;
10119 if (lap_state != state) {
10120 lap_state = state;
10121 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "dytc_lapmode");
10122 }
10123 }
10124 }
10125
palmsensor_refresh(void)10126 static void palmsensor_refresh(void)
10127 {
10128 bool state;
10129 int err;
10130
10131 if (has_palmsensor) {
10132 err = palmsensor_get(&has_palmsensor, &state);
10133 if (err)
10134 return;
10135 if (palm_state != state) {
10136 palm_state = state;
10137 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "palmsensor");
10138 }
10139 }
10140 }
10141
dytc_lapmode_show(struct device * dev,struct device_attribute * attr,char * buf)10142 static ssize_t dytc_lapmode_show(struct device *dev,
10143 struct device_attribute *attr,
10144 char *buf)
10145 {
10146 if (has_lapsensor)
10147 return sysfs_emit(buf, "%d\n", lap_state);
10148 return sysfs_emit(buf, "\n");
10149 }
10150 static DEVICE_ATTR_RO(dytc_lapmode);
10151
palmsensor_show(struct device * dev,struct device_attribute * attr,char * buf)10152 static ssize_t palmsensor_show(struct device *dev,
10153 struct device_attribute *attr,
10154 char *buf)
10155 {
10156 if (has_palmsensor)
10157 return sysfs_emit(buf, "%d\n", palm_state);
10158 return sysfs_emit(buf, "\n");
10159 }
10160 static DEVICE_ATTR_RO(palmsensor);
10161
10162 static struct attribute *proxsensor_attributes[] = {
10163 &dev_attr_dytc_lapmode.attr,
10164 &dev_attr_palmsensor.attr,
10165 NULL
10166 };
10167
proxsensor_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10168 static umode_t proxsensor_attr_is_visible(struct kobject *kobj,
10169 struct attribute *attr, int n)
10170 {
10171 if (attr == &dev_attr_dytc_lapmode.attr) {
10172 /*
10173 * Platforms before DYTC version 5 claim to have a lap sensor,
10174 * but it doesn't work, so we ignore them.
10175 */
10176 if (!has_lapsensor || dytc_version < 5)
10177 return 0;
10178 } else if (attr == &dev_attr_palmsensor.attr) {
10179 if (!has_palmsensor)
10180 return 0;
10181 }
10182
10183 return attr->mode;
10184 }
10185
10186 static const struct attribute_group proxsensor_attr_group = {
10187 .is_visible = proxsensor_attr_is_visible,
10188 .attrs = proxsensor_attributes,
10189 };
10190
tpacpi_proxsensor_init(struct ibm_init_struct * iibm)10191 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
10192 {
10193 int palm_err, lap_err;
10194
10195 palm_err = palmsensor_get(&has_palmsensor, &palm_state);
10196 lap_err = lapsensor_get(&has_lapsensor, &lap_state);
10197 /* If support isn't available for both devices return -ENODEV */
10198 if ((palm_err == -ENODEV) && (lap_err == -ENODEV))
10199 return -ENODEV;
10200 /* Otherwise, if there was an error return it */
10201 if (palm_err && (palm_err != -ENODEV))
10202 return palm_err;
10203 if (lap_err && (lap_err != -ENODEV))
10204 return lap_err;
10205
10206 return 0;
10207 }
10208
10209 static struct ibm_struct proxsensor_driver_data = {
10210 .name = "proximity-sensor",
10211 };
10212
10213 /*************************************************************************
10214 * DYTC Platform Profile interface
10215 */
10216
10217 #define DYTC_CMD_SET 1 /* To enable/disable IC function mode */
10218 #define DYTC_CMD_MMC_GET 8 /* To get current MMC function and mode */
10219 #define DYTC_CMD_RESET 0x1ff /* To reset back to default */
10220
10221 #define DYTC_CMD_FUNC_CAP 3 /* To get DYTC capabilities */
10222 #define DYTC_FC_MMC 27 /* MMC Mode supported */
10223 #define DYTC_FC_PSC 29 /* PSC Mode supported */
10224 #define DYTC_FC_AMT 31 /* AMT mode supported */
10225
10226 #define DYTC_GET_FUNCTION_BIT 8 /* Bits 8-11 - function setting */
10227 #define DYTC_GET_MODE_BIT 12 /* Bits 12-15 - mode setting */
10228
10229 #define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */
10230 #define DYTC_SET_MODE_BIT 16 /* Bits 16-19 - mode setting */
10231 #define DYTC_SET_VALID_BIT 20 /* Bit 20 - 1 = on, 0 = off */
10232
10233 #define DYTC_FUNCTION_STD 0 /* Function = 0, standard mode */
10234 #define DYTC_FUNCTION_CQL 1 /* Function = 1, lap mode */
10235 #define DYTC_FUNCTION_MMC 11 /* Function = 11, MMC mode */
10236 #define DYTC_FUNCTION_PSC 13 /* Function = 13, PSC mode */
10237 #define DYTC_FUNCTION_AMT 15 /* Function = 15, AMT mode */
10238
10239 #define DYTC_MODE_AMT_ENABLE 0x1 /* Enable AMT (in balanced mode) */
10240 #define DYTC_MODE_AMT_DISABLE 0xF /* Disable AMT (in other modes) */
10241
10242 #define DYTC_MODE_MMC_PERFORM 2 /* High power mode aka performance */
10243 #define DYTC_MODE_MMC_LOWPOWER 3 /* Low power mode */
10244 #define DYTC_MODE_MMC_BALANCE 0xF /* Default mode aka balanced */
10245 #define DYTC_MODE_MMC_DEFAULT 0 /* Default mode from MMC_GET, aka balanced */
10246
10247 #define DYTC_MODE_PSC_LOWPOWER 3 /* Low power mode */
10248 #define DYTC_MODE_PSC_BALANCE 5 /* Default mode aka balanced */
10249 #define DYTC_MODE_PSC_PERFORM 7 /* High power mode aka performance */
10250
10251 #define DYTC_ERR_MASK 0xF /* Bits 0-3 in cmd result are the error result */
10252 #define DYTC_ERR_SUCCESS 1 /* CMD completed successful */
10253
10254 #define DYTC_SET_COMMAND(function, mode, on) \
10255 (DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \
10256 (mode) << DYTC_SET_MODE_BIT | \
10257 (on) << DYTC_SET_VALID_BIT)
10258
10259 #define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 0)
10260 #define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 1)
10261 static int dytc_control_amt(bool enable);
10262 static bool dytc_amt_active;
10263
10264 static enum platform_profile_option dytc_current_profile;
10265 static atomic_t dytc_ignore_event = ATOMIC_INIT(0);
10266 static DEFINE_MUTEX(dytc_mutex);
10267 static int dytc_capabilities;
10268 static bool dytc_mmc_get_available;
10269 static int profile_force;
10270
convert_dytc_to_profile(int funcmode,int dytcmode,enum platform_profile_option * profile)10271 static int convert_dytc_to_profile(int funcmode, int dytcmode,
10272 enum platform_profile_option *profile)
10273 {
10274 switch (funcmode) {
10275 case DYTC_FUNCTION_MMC:
10276 switch (dytcmode) {
10277 case DYTC_MODE_MMC_LOWPOWER:
10278 *profile = PLATFORM_PROFILE_LOW_POWER;
10279 break;
10280 case DYTC_MODE_MMC_DEFAULT:
10281 case DYTC_MODE_MMC_BALANCE:
10282 *profile = PLATFORM_PROFILE_BALANCED;
10283 break;
10284 case DYTC_MODE_MMC_PERFORM:
10285 *profile = PLATFORM_PROFILE_PERFORMANCE;
10286 break;
10287 default: /* Unknown mode */
10288 return -EINVAL;
10289 }
10290 return 0;
10291 case DYTC_FUNCTION_PSC:
10292 switch (dytcmode) {
10293 case DYTC_MODE_PSC_LOWPOWER:
10294 *profile = PLATFORM_PROFILE_LOW_POWER;
10295 break;
10296 case DYTC_MODE_PSC_BALANCE:
10297 *profile = PLATFORM_PROFILE_BALANCED;
10298 break;
10299 case DYTC_MODE_PSC_PERFORM:
10300 *profile = PLATFORM_PROFILE_PERFORMANCE;
10301 break;
10302 default: /* Unknown mode */
10303 return -EINVAL;
10304 }
10305 return 0;
10306 case DYTC_FUNCTION_AMT:
10307 /* For now return balanced. It's the closest we have to 'auto' */
10308 *profile = PLATFORM_PROFILE_BALANCED;
10309 return 0;
10310 default:
10311 /* Unknown function */
10312 pr_debug("unknown function 0x%x\n", funcmode);
10313 return -EOPNOTSUPP;
10314 }
10315 return 0;
10316 }
10317
convert_profile_to_dytc(enum platform_profile_option profile,int * perfmode)10318 static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode)
10319 {
10320 switch (profile) {
10321 case PLATFORM_PROFILE_LOW_POWER:
10322 if (dytc_capabilities & BIT(DYTC_FC_MMC))
10323 *perfmode = DYTC_MODE_MMC_LOWPOWER;
10324 else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10325 *perfmode = DYTC_MODE_PSC_LOWPOWER;
10326 break;
10327 case PLATFORM_PROFILE_BALANCED:
10328 if (dytc_capabilities & BIT(DYTC_FC_MMC))
10329 *perfmode = DYTC_MODE_MMC_BALANCE;
10330 else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10331 *perfmode = DYTC_MODE_PSC_BALANCE;
10332 break;
10333 case PLATFORM_PROFILE_PERFORMANCE:
10334 if (dytc_capabilities & BIT(DYTC_FC_MMC))
10335 *perfmode = DYTC_MODE_MMC_PERFORM;
10336 else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10337 *perfmode = DYTC_MODE_PSC_PERFORM;
10338 break;
10339 default: /* Unknown profile */
10340 return -EOPNOTSUPP;
10341 }
10342 return 0;
10343 }
10344
10345 /*
10346 * dytc_profile_get: Function to register with platform_profile
10347 * handler. Returns current platform profile.
10348 */
dytc_profile_get(struct platform_profile_handler * pprof,enum platform_profile_option * profile)10349 static int dytc_profile_get(struct platform_profile_handler *pprof,
10350 enum platform_profile_option *profile)
10351 {
10352 *profile = dytc_current_profile;
10353 return 0;
10354 }
10355
dytc_control_amt(bool enable)10356 static int dytc_control_amt(bool enable)
10357 {
10358 int dummy;
10359 int err;
10360 int cmd;
10361
10362 if (!(dytc_capabilities & BIT(DYTC_FC_AMT))) {
10363 pr_warn("Attempting to toggle AMT on a system that doesn't advertise support\n");
10364 return -ENODEV;
10365 }
10366
10367 if (enable)
10368 cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_ENABLE, enable);
10369 else
10370 cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_DISABLE, enable);
10371
10372 pr_debug("%sabling AMT (cmd 0x%x)", enable ? "en":"dis", cmd);
10373 err = dytc_command(cmd, &dummy);
10374 if (err)
10375 return err;
10376 dytc_amt_active = enable;
10377 return 0;
10378 }
10379
10380 /*
10381 * Helper function - check if we are in CQL mode and if we are
10382 * - disable CQL,
10383 * - run the command
10384 * - enable CQL
10385 * If not in CQL mode, just run the command
10386 */
dytc_cql_command(int command,int * output)10387 static int dytc_cql_command(int command, int *output)
10388 {
10389 int err, cmd_err, dummy;
10390 int cur_funcmode;
10391
10392 /* Determine if we are in CQL mode. This alters the commands we do */
10393 err = dytc_command(DYTC_CMD_GET, output);
10394 if (err)
10395 return err;
10396
10397 cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF;
10398 /* Check if we're OK to return immediately */
10399 if ((command == DYTC_CMD_GET) && (cur_funcmode != DYTC_FUNCTION_CQL))
10400 return 0;
10401
10402 if (cur_funcmode == DYTC_FUNCTION_CQL) {
10403 atomic_inc(&dytc_ignore_event);
10404 err = dytc_command(DYTC_DISABLE_CQL, &dummy);
10405 if (err)
10406 return err;
10407 }
10408
10409 cmd_err = dytc_command(command, output);
10410 /* Check return condition after we've restored CQL state */
10411
10412 if (cur_funcmode == DYTC_FUNCTION_CQL) {
10413 err = dytc_command(DYTC_ENABLE_CQL, &dummy);
10414 if (err)
10415 return err;
10416 }
10417 return cmd_err;
10418 }
10419
10420 /*
10421 * dytc_profile_set: Function to register with platform_profile
10422 * handler. Sets current platform profile.
10423 */
dytc_profile_set(struct platform_profile_handler * pprof,enum platform_profile_option profile)10424 static int dytc_profile_set(struct platform_profile_handler *pprof,
10425 enum platform_profile_option profile)
10426 {
10427 int perfmode;
10428 int output;
10429 int err;
10430
10431 err = mutex_lock_interruptible(&dytc_mutex);
10432 if (err)
10433 return err;
10434
10435 err = convert_profile_to_dytc(profile, &perfmode);
10436 if (err)
10437 goto unlock;
10438
10439 if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10440 if (profile == PLATFORM_PROFILE_BALANCED) {
10441 /*
10442 * To get back to balanced mode we need to issue a reset command.
10443 * Note we still need to disable CQL mode before hand and re-enable
10444 * it afterwards, otherwise dytc_lapmode gets reset to 0 and stays
10445 * stuck at 0 for aprox. 30 minutes.
10446 */
10447 err = dytc_cql_command(DYTC_CMD_RESET, &output);
10448 if (err)
10449 goto unlock;
10450 } else {
10451 /* Determine if we are in CQL mode. This alters the commands we do */
10452 err = dytc_cql_command(DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
10453 &output);
10454 if (err)
10455 goto unlock;
10456 }
10457 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
10458 err = dytc_command(DYTC_SET_COMMAND(DYTC_FUNCTION_PSC, perfmode, 1), &output);
10459 if (err)
10460 goto unlock;
10461
10462 /* system supports AMT, activate it when on balanced */
10463 if (dytc_capabilities & BIT(DYTC_FC_AMT))
10464 dytc_control_amt(profile == PLATFORM_PROFILE_BALANCED);
10465 }
10466 /* Success - update current profile */
10467 dytc_current_profile = profile;
10468 unlock:
10469 mutex_unlock(&dytc_mutex);
10470 return err;
10471 }
10472
dytc_profile_refresh(void)10473 static void dytc_profile_refresh(void)
10474 {
10475 enum platform_profile_option profile;
10476 int output = 0, err = 0;
10477 int perfmode, funcmode = 0;
10478
10479 mutex_lock(&dytc_mutex);
10480 if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10481 if (dytc_mmc_get_available)
10482 err = dytc_command(DYTC_CMD_MMC_GET, &output);
10483 else
10484 err = dytc_cql_command(DYTC_CMD_GET, &output);
10485 funcmode = DYTC_FUNCTION_MMC;
10486 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
10487 err = dytc_command(DYTC_CMD_GET, &output);
10488 /* Check if we are PSC mode, or have AMT enabled */
10489 funcmode = (output >> DYTC_GET_FUNCTION_BIT) & 0xF;
10490 } else { /* Unknown profile mode */
10491 err = -ENODEV;
10492 }
10493 mutex_unlock(&dytc_mutex);
10494 if (err)
10495 return;
10496
10497 perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
10498 err = convert_dytc_to_profile(funcmode, perfmode, &profile);
10499 if (!err && profile != dytc_current_profile) {
10500 dytc_current_profile = profile;
10501 platform_profile_notify();
10502 }
10503 }
10504
10505 static struct platform_profile_handler dytc_profile = {
10506 .profile_get = dytc_profile_get,
10507 .profile_set = dytc_profile_set,
10508 };
10509
tpacpi_dytc_profile_init(struct ibm_init_struct * iibm)10510 static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
10511 {
10512 int err, output;
10513
10514 /* Setup supported modes */
10515 set_bit(PLATFORM_PROFILE_LOW_POWER, dytc_profile.choices);
10516 set_bit(PLATFORM_PROFILE_BALANCED, dytc_profile.choices);
10517 set_bit(PLATFORM_PROFILE_PERFORMANCE, dytc_profile.choices);
10518
10519 err = dytc_command(DYTC_CMD_QUERY, &output);
10520 if (err)
10521 return err;
10522
10523 if (output & BIT(DYTC_QUERY_ENABLE_BIT))
10524 dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
10525
10526 /* Check DYTC is enabled and supports mode setting */
10527 if (dytc_version < 5)
10528 return -ENODEV;
10529
10530 /* Check what capabilities are supported */
10531 err = dytc_command(DYTC_CMD_FUNC_CAP, &dytc_capabilities);
10532 if (err)
10533 return err;
10534
10535 /* Check if user wants to override the profile selection */
10536 if (profile_force) {
10537 switch (profile_force) {
10538 case -1:
10539 dytc_capabilities = 0;
10540 break;
10541 case 1:
10542 dytc_capabilities = BIT(DYTC_FC_MMC);
10543 break;
10544 case 2:
10545 dytc_capabilities = BIT(DYTC_FC_PSC);
10546 break;
10547 }
10548 pr_debug("Profile selection forced: 0x%x\n", dytc_capabilities);
10549 }
10550 if (dytc_capabilities & BIT(DYTC_FC_MMC)) { /* MMC MODE */
10551 pr_debug("MMC is supported\n");
10552 /*
10553 * Check if MMC_GET functionality available
10554 * Version > 6 and return success from MMC_GET command
10555 */
10556 dytc_mmc_get_available = false;
10557 if (dytc_version >= 6) {
10558 err = dytc_command(DYTC_CMD_MMC_GET, &output);
10559 if (!err && ((output & DYTC_ERR_MASK) == DYTC_ERR_SUCCESS))
10560 dytc_mmc_get_available = true;
10561 }
10562 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { /* PSC MODE */
10563 pr_debug("PSC is supported\n");
10564 } else {
10565 dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n");
10566 return -ENODEV;
10567 }
10568
10569 dbg_printk(TPACPI_DBG_INIT,
10570 "DYTC version %d: thermal mode available\n", dytc_version);
10571
10572 /* Create platform_profile structure and register */
10573 err = platform_profile_register(&dytc_profile);
10574 /*
10575 * If for some reason platform_profiles aren't enabled
10576 * don't quit terminally.
10577 */
10578 if (err)
10579 return -ENODEV;
10580
10581 /* Ensure initial values are correct */
10582 dytc_profile_refresh();
10583
10584 /* Workaround for https://bugzilla.kernel.org/show_bug.cgi?id=216347 */
10585 if (dytc_capabilities & BIT(DYTC_FC_PSC))
10586 dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
10587
10588 return 0;
10589 }
10590
dytc_profile_exit(void)10591 static void dytc_profile_exit(void)
10592 {
10593 platform_profile_remove();
10594 }
10595
10596 static struct ibm_struct dytc_profile_driver_data = {
10597 .name = "dytc-profile",
10598 .exit = dytc_profile_exit,
10599 };
10600
10601 /*************************************************************************
10602 * Keyboard language interface
10603 */
10604
10605 struct keyboard_lang_data {
10606 const char *lang_str;
10607 int lang_code;
10608 };
10609
10610 static const struct keyboard_lang_data keyboard_lang_data[] = {
10611 {"be", 0x080c},
10612 {"cz", 0x0405},
10613 {"da", 0x0406},
10614 {"de", 0x0c07},
10615 {"en", 0x0000},
10616 {"es", 0x2c0a},
10617 {"et", 0x0425},
10618 {"fr", 0x040c},
10619 {"fr-ch", 0x100c},
10620 {"hu", 0x040e},
10621 {"it", 0x0410},
10622 {"jp", 0x0411},
10623 {"nl", 0x0413},
10624 {"nn", 0x0414},
10625 {"pl", 0x0415},
10626 {"pt", 0x0816},
10627 {"sl", 0x041b},
10628 {"sv", 0x081d},
10629 {"tr", 0x041f},
10630 };
10631
set_keyboard_lang_command(int command)10632 static int set_keyboard_lang_command(int command)
10633 {
10634 acpi_handle sskl_handle;
10635 int output;
10636
10637 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSKL", &sskl_handle))) {
10638 /* Platform doesn't support SSKL */
10639 return -ENODEV;
10640 }
10641
10642 if (!acpi_evalf(sskl_handle, &output, NULL, "dd", command))
10643 return -EIO;
10644
10645 return 0;
10646 }
10647
get_keyboard_lang(int * output)10648 static int get_keyboard_lang(int *output)
10649 {
10650 acpi_handle gskl_handle;
10651 int kbd_lang;
10652
10653 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSKL", &gskl_handle))) {
10654 /* Platform doesn't support GSKL */
10655 return -ENODEV;
10656 }
10657
10658 if (!acpi_evalf(gskl_handle, &kbd_lang, NULL, "dd", 0x02000000))
10659 return -EIO;
10660
10661 /*
10662 * METHOD_ERR gets returned on devices where there are no special (e.g. '=',
10663 * '(' and ')') keys which use layout dependent key-press emulation.
10664 */
10665 if (kbd_lang & METHOD_ERR)
10666 return -ENODEV;
10667
10668 *output = kbd_lang;
10669
10670 return 0;
10671 }
10672
10673 /* sysfs keyboard language entry */
keyboard_lang_show(struct device * dev,struct device_attribute * attr,char * buf)10674 static ssize_t keyboard_lang_show(struct device *dev,
10675 struct device_attribute *attr,
10676 char *buf)
10677 {
10678 int output, err, i, len = 0;
10679
10680 err = get_keyboard_lang(&output);
10681 if (err)
10682 return err;
10683
10684 for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) {
10685 if (i)
10686 len += sysfs_emit_at(buf, len, "%s", " ");
10687
10688 if (output == keyboard_lang_data[i].lang_code) {
10689 len += sysfs_emit_at(buf, len, "[%s]", keyboard_lang_data[i].lang_str);
10690 } else {
10691 len += sysfs_emit_at(buf, len, "%s", keyboard_lang_data[i].lang_str);
10692 }
10693 }
10694 len += sysfs_emit_at(buf, len, "\n");
10695
10696 return len;
10697 }
10698
keyboard_lang_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)10699 static ssize_t keyboard_lang_store(struct device *dev,
10700 struct device_attribute *attr,
10701 const char *buf, size_t count)
10702 {
10703 int err, i;
10704 bool lang_found = false;
10705 int lang_code = 0;
10706
10707 for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) {
10708 if (sysfs_streq(buf, keyboard_lang_data[i].lang_str)) {
10709 lang_code = keyboard_lang_data[i].lang_code;
10710 lang_found = true;
10711 break;
10712 }
10713 }
10714
10715 if (lang_found) {
10716 lang_code = lang_code | 1 << 24;
10717
10718 /* Set language code */
10719 err = set_keyboard_lang_command(lang_code);
10720 if (err)
10721 return err;
10722 } else {
10723 dev_err(&tpacpi_pdev->dev, "Unknown Keyboard language. Ignoring\n");
10724 return -EINVAL;
10725 }
10726
10727 tpacpi_disclose_usertask(attr->attr.name,
10728 "keyboard language is set to %s\n", buf);
10729
10730 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "keyboard_lang");
10731
10732 return count;
10733 }
10734 static DEVICE_ATTR_RW(keyboard_lang);
10735
10736 static struct attribute *kbdlang_attributes[] = {
10737 &dev_attr_keyboard_lang.attr,
10738 NULL
10739 };
10740
kbdlang_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10741 static umode_t kbdlang_attr_is_visible(struct kobject *kobj,
10742 struct attribute *attr, int n)
10743 {
10744 return tp_features.kbd_lang ? attr->mode : 0;
10745 }
10746
10747 static const struct attribute_group kbdlang_attr_group = {
10748 .is_visible = kbdlang_attr_is_visible,
10749 .attrs = kbdlang_attributes,
10750 };
10751
tpacpi_kbdlang_init(struct ibm_init_struct * iibm)10752 static int tpacpi_kbdlang_init(struct ibm_init_struct *iibm)
10753 {
10754 int err, output;
10755
10756 err = get_keyboard_lang(&output);
10757 tp_features.kbd_lang = !err;
10758 return err;
10759 }
10760
10761 static struct ibm_struct kbdlang_driver_data = {
10762 .name = "kbdlang",
10763 };
10764
10765 /*************************************************************************
10766 * DPRC(Dynamic Power Reduction Control) subdriver, for the Lenovo WWAN
10767 * and WLAN feature.
10768 */
10769 #define DPRC_GET_WWAN_ANTENNA_TYPE 0x40000
10770 #define DPRC_WWAN_ANTENNA_TYPE_A_BIT BIT(4)
10771 #define DPRC_WWAN_ANTENNA_TYPE_B_BIT BIT(8)
10772 static bool has_antennatype;
10773 static int wwan_antennatype;
10774
dprc_command(int command,int * output)10775 static int dprc_command(int command, int *output)
10776 {
10777 acpi_handle dprc_handle;
10778
10779 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DPRC", &dprc_handle))) {
10780 /* Platform doesn't support DPRC */
10781 return -ENODEV;
10782 }
10783
10784 if (!acpi_evalf(dprc_handle, output, NULL, "dd", command))
10785 return -EIO;
10786
10787 /*
10788 * METHOD_ERR gets returned on devices where few commands are not supported
10789 * for example command to get WWAN Antenna type command is not supported on
10790 * some devices.
10791 */
10792 if (*output & METHOD_ERR)
10793 return -ENODEV;
10794
10795 return 0;
10796 }
10797
get_wwan_antenna(int * wwan_antennatype)10798 static int get_wwan_antenna(int *wwan_antennatype)
10799 {
10800 int output, err;
10801
10802 /* Get current Antenna type */
10803 err = dprc_command(DPRC_GET_WWAN_ANTENNA_TYPE, &output);
10804 if (err)
10805 return err;
10806
10807 if (output & DPRC_WWAN_ANTENNA_TYPE_A_BIT)
10808 *wwan_antennatype = 1;
10809 else if (output & DPRC_WWAN_ANTENNA_TYPE_B_BIT)
10810 *wwan_antennatype = 2;
10811 else
10812 return -ENODEV;
10813
10814 return 0;
10815 }
10816
10817 /* sysfs wwan antenna type entry */
wwan_antenna_type_show(struct device * dev,struct device_attribute * attr,char * buf)10818 static ssize_t wwan_antenna_type_show(struct device *dev,
10819 struct device_attribute *attr,
10820 char *buf)
10821 {
10822 switch (wwan_antennatype) {
10823 case 1:
10824 return sysfs_emit(buf, "type a\n");
10825 case 2:
10826 return sysfs_emit(buf, "type b\n");
10827 default:
10828 return -ENODATA;
10829 }
10830 }
10831 static DEVICE_ATTR_RO(wwan_antenna_type);
10832
10833 static struct attribute *dprc_attributes[] = {
10834 &dev_attr_wwan_antenna_type.attr,
10835 NULL
10836 };
10837
dprc_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10838 static umode_t dprc_attr_is_visible(struct kobject *kobj,
10839 struct attribute *attr, int n)
10840 {
10841 return has_antennatype ? attr->mode : 0;
10842 }
10843
10844 static const struct attribute_group dprc_attr_group = {
10845 .is_visible = dprc_attr_is_visible,
10846 .attrs = dprc_attributes,
10847 };
10848
tpacpi_dprc_init(struct ibm_init_struct * iibm)10849 static int tpacpi_dprc_init(struct ibm_init_struct *iibm)
10850 {
10851 int err;
10852
10853 err = get_wwan_antenna(&wwan_antennatype);
10854 if (err)
10855 return err;
10856
10857 has_antennatype = true;
10858 return 0;
10859 }
10860
10861 static struct ibm_struct dprc_driver_data = {
10862 .name = "dprc",
10863 };
10864
10865 /* --------------------------------------------------------------------- */
10866
10867 static struct attribute *tpacpi_driver_attributes[] = {
10868 &driver_attr_debug_level.attr,
10869 &driver_attr_version.attr,
10870 &driver_attr_interface_version.attr,
10871 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10872 &driver_attr_wlsw_emulstate.attr,
10873 &driver_attr_bluetooth_emulstate.attr,
10874 &driver_attr_wwan_emulstate.attr,
10875 &driver_attr_uwb_emulstate.attr,
10876 #endif
10877 NULL
10878 };
10879
10880 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
tpacpi_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10881 static umode_t tpacpi_attr_is_visible(struct kobject *kobj,
10882 struct attribute *attr, int n)
10883 {
10884 if (attr == &driver_attr_wlsw_emulstate.attr) {
10885 if (!dbg_wlswemul)
10886 return 0;
10887 } else if (attr == &driver_attr_bluetooth_emulstate.attr) {
10888 if (!dbg_bluetoothemul)
10889 return 0;
10890 } else if (attr == &driver_attr_wwan_emulstate.attr) {
10891 if (!dbg_wwanemul)
10892 return 0;
10893 } else if (attr == &driver_attr_uwb_emulstate.attr) {
10894 if (!dbg_uwbemul)
10895 return 0;
10896 }
10897
10898 return attr->mode;
10899 }
10900 #endif
10901
10902 static const struct attribute_group tpacpi_driver_attr_group = {
10903 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10904 .is_visible = tpacpi_attr_is_visible,
10905 #endif
10906 .attrs = tpacpi_driver_attributes,
10907 };
10908
10909 static const struct attribute_group *tpacpi_driver_groups[] = {
10910 &tpacpi_driver_attr_group,
10911 NULL,
10912 };
10913
10914 static const struct attribute_group *tpacpi_groups[] = {
10915 &adaptive_kbd_attr_group,
10916 &hotkey_attr_group,
10917 &bluetooth_attr_group,
10918 &wan_attr_group,
10919 &cmos_attr_group,
10920 &proxsensor_attr_group,
10921 &kbdlang_attr_group,
10922 &dprc_attr_group,
10923 NULL,
10924 };
10925
10926 static const struct attribute_group *tpacpi_hwmon_groups[] = {
10927 &thermal_attr_group,
10928 &temp_label_attr_group,
10929 &fan_attr_group,
10930 NULL,
10931 };
10932
10933 static const struct attribute_group *tpacpi_hwmon_driver_groups[] = {
10934 &fan_driver_attr_group,
10935 NULL,
10936 };
10937
10938 /****************************************************************************
10939 ****************************************************************************
10940 *
10941 * Platform drivers
10942 *
10943 ****************************************************************************
10944 ****************************************************************************/
10945
10946 static struct platform_driver tpacpi_pdriver = {
10947 .driver = {
10948 .name = TPACPI_DRVR_NAME,
10949 .pm = &tpacpi_pm,
10950 .groups = tpacpi_driver_groups,
10951 .dev_groups = tpacpi_groups,
10952 },
10953 .shutdown = tpacpi_shutdown_handler,
10954 };
10955
10956 static struct platform_driver tpacpi_hwmon_pdriver = {
10957 .driver = {
10958 .name = TPACPI_HWMON_DRVR_NAME,
10959 .groups = tpacpi_hwmon_driver_groups,
10960 },
10961 };
10962
10963 /****************************************************************************
10964 ****************************************************************************
10965 *
10966 * Infrastructure
10967 *
10968 ****************************************************************************
10969 ****************************************************************************/
10970
10971 /*
10972 * HKEY event callout for other subdrivers go here
10973 * (yes, it is ugly, but it is quick, safe, and gets the job done
10974 */
tpacpi_driver_event(const unsigned int hkey_event)10975 static void tpacpi_driver_event(const unsigned int hkey_event)
10976 {
10977 if (ibm_backlight_device) {
10978 switch (hkey_event) {
10979 case TP_HKEY_EV_BRGHT_UP:
10980 case TP_HKEY_EV_BRGHT_DOWN:
10981 tpacpi_brightness_notify_change();
10982 }
10983 }
10984 if (alsa_card) {
10985 switch (hkey_event) {
10986 case TP_HKEY_EV_VOL_UP:
10987 case TP_HKEY_EV_VOL_DOWN:
10988 case TP_HKEY_EV_VOL_MUTE:
10989 volume_alsa_notify_change();
10990 }
10991 }
10992 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
10993 enum led_brightness brightness;
10994
10995 mutex_lock(&kbdlight_mutex);
10996
10997 /*
10998 * Check the brightness actually changed, setting the brightness
10999 * through kbdlight_set_level() also triggers this event.
11000 */
11001 brightness = kbdlight_sysfs_get(NULL);
11002 if (kbdlight_brightness != brightness) {
11003 kbdlight_brightness = brightness;
11004 led_classdev_notify_brightness_hw_changed(
11005 &tpacpi_led_kbdlight.led_classdev, brightness);
11006 }
11007
11008 mutex_unlock(&kbdlight_mutex);
11009 }
11010
11011 if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED) {
11012 lapsensor_refresh();
11013 /* If we are already accessing DYTC then skip dytc update */
11014 if (!atomic_add_unless(&dytc_ignore_event, -1, 0))
11015 dytc_profile_refresh();
11016 }
11017
11018 if (lcdshadow_dev && hkey_event == TP_HKEY_EV_PRIVACYGUARD_TOGGLE) {
11019 enum drm_privacy_screen_status old_hw_state;
11020 bool changed;
11021
11022 mutex_lock(&lcdshadow_dev->lock);
11023 old_hw_state = lcdshadow_dev->hw_state;
11024 lcdshadow_get_hw_state(lcdshadow_dev);
11025 changed = lcdshadow_dev->hw_state != old_hw_state;
11026 mutex_unlock(&lcdshadow_dev->lock);
11027
11028 if (changed)
11029 drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
11030 }
11031 if (hkey_event == TP_HKEY_EV_AMT_TOGGLE) {
11032 /* If we're enabling AMT we need to force balanced mode */
11033 if (!dytc_amt_active)
11034 /* This will also set AMT mode enabled */
11035 dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
11036 else
11037 dytc_control_amt(!dytc_amt_active);
11038 }
11039
11040 }
11041
hotkey_driver_event(const unsigned int scancode)11042 static void hotkey_driver_event(const unsigned int scancode)
11043 {
11044 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
11045 }
11046
11047 /* --------------------------------------------------------------------- */
11048
11049 /* /proc support */
11050 static struct proc_dir_entry *proc_dir;
11051
11052 /*
11053 * Module and infrastructure proble, init and exit handling
11054 */
11055
11056 static bool force_load;
11057
11058 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
str_supported(int is_supported)11059 static const char * __init str_supported(int is_supported)
11060 {
11061 static char text_unsupported[] __initdata = "not supported";
11062
11063 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
11064 }
11065 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
11066
ibm_exit(struct ibm_struct * ibm)11067 static void ibm_exit(struct ibm_struct *ibm)
11068 {
11069 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
11070
11071 list_del_init(&ibm->all_drivers);
11072
11073 if (ibm->flags.acpi_notify_installed) {
11074 dbg_printk(TPACPI_DBG_EXIT,
11075 "%s: acpi_remove_notify_handler\n", ibm->name);
11076 BUG_ON(!ibm->acpi);
11077 acpi_remove_notify_handler(*ibm->acpi->handle,
11078 ibm->acpi->type,
11079 dispatch_acpi_notify);
11080 ibm->flags.acpi_notify_installed = 0;
11081 }
11082
11083 if (ibm->flags.proc_created) {
11084 dbg_printk(TPACPI_DBG_EXIT,
11085 "%s: remove_proc_entry\n", ibm->name);
11086 remove_proc_entry(ibm->name, proc_dir);
11087 ibm->flags.proc_created = 0;
11088 }
11089
11090 if (ibm->flags.acpi_driver_registered) {
11091 dbg_printk(TPACPI_DBG_EXIT,
11092 "%s: acpi_bus_unregister_driver\n", ibm->name);
11093 BUG_ON(!ibm->acpi);
11094 acpi_bus_unregister_driver(ibm->acpi->driver);
11095 kfree(ibm->acpi->driver);
11096 ibm->acpi->driver = NULL;
11097 ibm->flags.acpi_driver_registered = 0;
11098 }
11099
11100 if (ibm->flags.init_called && ibm->exit) {
11101 ibm->exit();
11102 ibm->flags.init_called = 0;
11103 }
11104
11105 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
11106 }
11107
ibm_init(struct ibm_init_struct * iibm)11108 static int __init ibm_init(struct ibm_init_struct *iibm)
11109 {
11110 int ret;
11111 struct ibm_struct *ibm = iibm->data;
11112 struct proc_dir_entry *entry;
11113
11114 BUG_ON(ibm == NULL);
11115
11116 INIT_LIST_HEAD(&ibm->all_drivers);
11117
11118 if (ibm->flags.experimental && !experimental)
11119 return 0;
11120
11121 dbg_printk(TPACPI_DBG_INIT,
11122 "probing for %s\n", ibm->name);
11123
11124 if (iibm->init) {
11125 ret = iibm->init(iibm);
11126 if (ret > 0 || ret == -ENODEV)
11127 return 0; /* subdriver functionality not available */
11128 if (ret)
11129 return ret;
11130
11131 ibm->flags.init_called = 1;
11132 }
11133
11134 if (ibm->acpi) {
11135 if (ibm->acpi->hid) {
11136 ret = register_tpacpi_subdriver(ibm);
11137 if (ret)
11138 goto err_out;
11139 }
11140
11141 if (ibm->acpi->notify) {
11142 ret = setup_acpi_notify(ibm);
11143 if (ret == -ENODEV) {
11144 pr_notice("disabling subdriver %s\n",
11145 ibm->name);
11146 ret = 0;
11147 goto err_out;
11148 }
11149 if (ret < 0)
11150 goto err_out;
11151 }
11152 }
11153
11154 dbg_printk(TPACPI_DBG_INIT,
11155 "%s installed\n", ibm->name);
11156
11157 if (ibm->read) {
11158 umode_t mode = iibm->base_procfs_mode;
11159
11160 if (!mode)
11161 mode = S_IRUGO;
11162 if (ibm->write)
11163 mode |= S_IWUSR;
11164 entry = proc_create_data(ibm->name, mode, proc_dir,
11165 &dispatch_proc_ops, ibm);
11166 if (!entry) {
11167 pr_err("unable to create proc entry %s\n", ibm->name);
11168 ret = -ENODEV;
11169 goto err_out;
11170 }
11171 ibm->flags.proc_created = 1;
11172 }
11173
11174 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
11175
11176 return 0;
11177
11178 err_out:
11179 dbg_printk(TPACPI_DBG_INIT,
11180 "%s: at error exit path with result %d\n",
11181 ibm->name, ret);
11182
11183 ibm_exit(ibm);
11184 return (ret < 0) ? ret : 0;
11185 }
11186
11187 /* Probing */
11188
tpacpi_parse_fw_id(const char * const s,u32 * model,u16 * release)11189 static char __init tpacpi_parse_fw_id(const char * const s,
11190 u32 *model, u16 *release)
11191 {
11192 int i;
11193
11194 if (!s || strlen(s) < 8)
11195 goto invalid;
11196
11197 for (i = 0; i < 8; i++)
11198 if (!((s[i] >= '0' && s[i] <= '9') ||
11199 (s[i] >= 'A' && s[i] <= 'Z')))
11200 goto invalid;
11201
11202 /*
11203 * Most models: xxyTkkWW (#.##c)
11204 * Ancient 570/600 and -SL lacks (#.##c)
11205 */
11206 if (s[3] == 'T' || s[3] == 'N') {
11207 *model = TPID(s[0], s[1]);
11208 *release = TPVER(s[4], s[5]);
11209 return s[2];
11210
11211 /* New models: xxxyTkkW (#.##c); T550 and some others */
11212 } else if (s[4] == 'T' || s[4] == 'N') {
11213 *model = TPID3(s[0], s[1], s[2]);
11214 *release = TPVER(s[5], s[6]);
11215 return s[3];
11216 }
11217
11218 invalid:
11219 return '\0';
11220 }
11221
find_new_ec_fwstr(const struct dmi_header * dm,void * private)11222 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
11223 {
11224 char *ec_fw_string = (char *) private;
11225 const char *dmi_data = (const char *)dm;
11226 /*
11227 * ThinkPad Embedded Controller Program Table on newer models
11228 *
11229 * Offset | Name | Width | Description
11230 * ----------------------------------------------------
11231 * 0x00 | Type | BYTE | 0x8C
11232 * 0x01 | Length | BYTE |
11233 * 0x02 | Handle | WORD | Varies
11234 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO"
11235 * 0x0A | OEM struct offset | BYTE | 0x0B
11236 * 0x0B | OEM struct number | BYTE | 0x07, for this structure
11237 * 0x0C | OEM struct revision | BYTE | 0x01, for this format
11238 * 0x0D | ECP version ID | STR ID |
11239 * 0x0E | ECP release date | STR ID |
11240 */
11241
11242 /* Return if data structure not match */
11243 if (dm->type != 140 || dm->length < 0x0F ||
11244 memcmp(dmi_data + 4, "LENOVO", 6) != 0 ||
11245 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 ||
11246 dmi_data[0x0C] != 0x01)
11247 return;
11248
11249 /* fwstr is the first 8byte string */
11250 strncpy(ec_fw_string, dmi_data + 0x0F, 8);
11251 }
11252
11253 /* returns 0 - probe ok, or < 0 - probe error.
11254 * Probe ok doesn't mean thinkpad found.
11255 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
get_thinkpad_model_data(struct thinkpad_id_data * tp)11256 static int __must_check __init get_thinkpad_model_data(
11257 struct thinkpad_id_data *tp)
11258 {
11259 const struct dmi_device *dev = NULL;
11260 char ec_fw_string[18] = {0};
11261 char const *s;
11262 char t;
11263
11264 if (!tp)
11265 return -EINVAL;
11266
11267 memset(tp, 0, sizeof(*tp));
11268
11269 if (dmi_name_in_vendors("IBM"))
11270 tp->vendor = PCI_VENDOR_ID_IBM;
11271 else if (dmi_name_in_vendors("LENOVO"))
11272 tp->vendor = PCI_VENDOR_ID_LENOVO;
11273 else
11274 return 0;
11275
11276 s = dmi_get_system_info(DMI_BIOS_VERSION);
11277 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
11278 if (s && !tp->bios_version_str)
11279 return -ENOMEM;
11280
11281 /* Really ancient ThinkPad 240X will fail this, which is fine */
11282 t = tpacpi_parse_fw_id(tp->bios_version_str,
11283 &tp->bios_model, &tp->bios_release);
11284 if (t != 'E' && t != 'C')
11285 return 0;
11286
11287 /*
11288 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
11289 * X32 or newer, all Z series; Some models must have an
11290 * up-to-date BIOS or they will not be detected.
11291 *
11292 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
11293 */
11294 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
11295 if (sscanf(dev->name,
11296 "IBM ThinkPad Embedded Controller -[%17c",
11297 ec_fw_string) == 1) {
11298 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
11299 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
11300 break;
11301 }
11302 }
11303
11304 /* Newer ThinkPads have different EC program info table */
11305 if (!ec_fw_string[0])
11306 dmi_walk(find_new_ec_fwstr, &ec_fw_string);
11307
11308 if (ec_fw_string[0]) {
11309 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
11310 if (!tp->ec_version_str)
11311 return -ENOMEM;
11312
11313 t = tpacpi_parse_fw_id(ec_fw_string,
11314 &tp->ec_model, &tp->ec_release);
11315 if (t != 'H') {
11316 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
11317 ec_fw_string);
11318 pr_notice("please report this to %s\n", TPACPI_MAIL);
11319 }
11320 }
11321
11322 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
11323 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
11324 tp->model_str = kstrdup(s, GFP_KERNEL);
11325 if (!tp->model_str)
11326 return -ENOMEM;
11327 } else {
11328 s = dmi_get_system_info(DMI_BIOS_VENDOR);
11329 if (s && !(strncasecmp(s, "Lenovo", 6))) {
11330 tp->model_str = kstrdup(s, GFP_KERNEL);
11331 if (!tp->model_str)
11332 return -ENOMEM;
11333 }
11334 }
11335
11336 s = dmi_get_system_info(DMI_PRODUCT_NAME);
11337 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
11338 if (s && !tp->nummodel_str)
11339 return -ENOMEM;
11340
11341 return 0;
11342 }
11343
probe_for_thinkpad(void)11344 static int __init probe_for_thinkpad(void)
11345 {
11346 int is_thinkpad;
11347
11348 if (acpi_disabled)
11349 return -ENODEV;
11350
11351 /* It would be dangerous to run the driver in this case */
11352 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
11353 return -ENODEV;
11354
11355 /*
11356 * Non-ancient models have better DMI tagging, but very old models
11357 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
11358 */
11359 is_thinkpad = (thinkpad_id.model_str != NULL) ||
11360 (thinkpad_id.ec_model != 0) ||
11361 tpacpi_is_fw_known();
11362
11363 /* The EC handler is required */
11364 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
11365 if (!ec_handle) {
11366 if (is_thinkpad)
11367 pr_err("Not yet supported ThinkPad detected!\n");
11368 return -ENODEV;
11369 }
11370
11371 if (!is_thinkpad && !force_load)
11372 return -ENODEV;
11373
11374 return 0;
11375 }
11376
thinkpad_acpi_init_banner(void)11377 static void __init thinkpad_acpi_init_banner(void)
11378 {
11379 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
11380 pr_info("%s\n", TPACPI_URL);
11381
11382 pr_info("ThinkPad BIOS %s, EC %s\n",
11383 (thinkpad_id.bios_version_str) ?
11384 thinkpad_id.bios_version_str : "unknown",
11385 (thinkpad_id.ec_version_str) ?
11386 thinkpad_id.ec_version_str : "unknown");
11387
11388 BUG_ON(!thinkpad_id.vendor);
11389
11390 if (thinkpad_id.model_str)
11391 pr_info("%s %s, model %s\n",
11392 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
11393 "IBM" : ((thinkpad_id.vendor ==
11394 PCI_VENDOR_ID_LENOVO) ?
11395 "Lenovo" : "Unknown vendor"),
11396 thinkpad_id.model_str,
11397 (thinkpad_id.nummodel_str) ?
11398 thinkpad_id.nummodel_str : "unknown");
11399 }
11400
11401 /* Module init, exit, parameters */
11402
11403 static struct ibm_init_struct ibms_init[] __initdata = {
11404 {
11405 .data = &thinkpad_acpi_driver_data,
11406 },
11407 {
11408 .init = hotkey_init,
11409 .data = &hotkey_driver_data,
11410 },
11411 {
11412 .init = bluetooth_init,
11413 .data = &bluetooth_driver_data,
11414 },
11415 {
11416 .init = wan_init,
11417 .data = &wan_driver_data,
11418 },
11419 {
11420 .init = uwb_init,
11421 .data = &uwb_driver_data,
11422 },
11423 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
11424 {
11425 .init = video_init,
11426 .base_procfs_mode = S_IRUSR,
11427 .data = &video_driver_data,
11428 },
11429 #endif
11430 {
11431 .init = kbdlight_init,
11432 .data = &kbdlight_driver_data,
11433 },
11434 {
11435 .init = light_init,
11436 .data = &light_driver_data,
11437 },
11438 {
11439 .init = cmos_init,
11440 .data = &cmos_driver_data,
11441 },
11442 {
11443 .init = led_init,
11444 .data = &led_driver_data,
11445 },
11446 {
11447 .init = beep_init,
11448 .data = &beep_driver_data,
11449 },
11450 {
11451 .init = thermal_init,
11452 .data = &thermal_driver_data,
11453 },
11454 {
11455 .init = brightness_init,
11456 .data = &brightness_driver_data,
11457 },
11458 {
11459 .init = volume_init,
11460 .data = &volume_driver_data,
11461 },
11462 {
11463 .init = fan_init,
11464 .data = &fan_driver_data,
11465 },
11466 {
11467 .init = mute_led_init,
11468 .data = &mute_led_driver_data,
11469 },
11470 {
11471 .init = tpacpi_battery_init,
11472 .data = &battery_driver_data,
11473 },
11474 {
11475 .init = tpacpi_lcdshadow_init,
11476 .data = &lcdshadow_driver_data,
11477 },
11478 {
11479 .init = tpacpi_proxsensor_init,
11480 .data = &proxsensor_driver_data,
11481 },
11482 {
11483 .init = tpacpi_dytc_profile_init,
11484 .data = &dytc_profile_driver_data,
11485 },
11486 {
11487 .init = tpacpi_kbdlang_init,
11488 .data = &kbdlang_driver_data,
11489 },
11490 {
11491 .init = tpacpi_dprc_init,
11492 .data = &dprc_driver_data,
11493 },
11494 };
11495
set_ibm_param(const char * val,const struct kernel_param * kp)11496 static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
11497 {
11498 unsigned int i;
11499 struct ibm_struct *ibm;
11500
11501 if (!kp || !kp->name || !val)
11502 return -EINVAL;
11503
11504 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
11505 ibm = ibms_init[i].data;
11506 if (!ibm || !ibm->name)
11507 continue;
11508
11509 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
11510 if (strlen(val) > sizeof(ibms_init[i].param) - 1)
11511 return -ENOSPC;
11512 strcpy(ibms_init[i].param, val);
11513 return 0;
11514 }
11515 }
11516
11517 return -EINVAL;
11518 }
11519
11520 module_param(experimental, int, 0444);
11521 MODULE_PARM_DESC(experimental,
11522 "Enables experimental features when non-zero");
11523
11524 module_param_named(debug, dbg_level, uint, 0);
11525 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
11526
11527 module_param(force_load, bool, 0444);
11528 MODULE_PARM_DESC(force_load,
11529 "Attempts to load the driver even on a mis-identified ThinkPad when true");
11530
11531 module_param_named(fan_control, fan_control_allowed, bool, 0444);
11532 MODULE_PARM_DESC(fan_control,
11533 "Enables setting fan parameters features when true");
11534
11535 module_param_named(brightness_mode, brightness_mode, uint, 0444);
11536 MODULE_PARM_DESC(brightness_mode,
11537 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
11538
11539 module_param(brightness_enable, uint, 0444);
11540 MODULE_PARM_DESC(brightness_enable,
11541 "Enables backlight control when 1, disables when 0");
11542
11543 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
11544 module_param_named(volume_mode, volume_mode, uint, 0444);
11545 MODULE_PARM_DESC(volume_mode,
11546 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
11547
11548 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
11549 MODULE_PARM_DESC(volume_capabilities,
11550 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only");
11551
11552 module_param_named(volume_control, volume_control_allowed, bool, 0444);
11553 MODULE_PARM_DESC(volume_control,
11554 "Enables software override for the console audio control when true");
11555
11556 module_param_named(software_mute, software_mute_requested, bool, 0444);
11557 MODULE_PARM_DESC(software_mute,
11558 "Request full software mute control");
11559
11560 /* ALSA module API parameters */
11561 module_param_named(index, alsa_index, int, 0444);
11562 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
11563 module_param_named(id, alsa_id, charp, 0444);
11564 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
11565 module_param_named(enable, alsa_enable, bool, 0444);
11566 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
11567 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
11568
11569 /* The module parameter can't be read back, that's why 0 is used here */
11570 #define TPACPI_PARAM(feature) \
11571 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
11572 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
11573
11574 TPACPI_PARAM(hotkey);
11575 TPACPI_PARAM(bluetooth);
11576 TPACPI_PARAM(video);
11577 TPACPI_PARAM(light);
11578 TPACPI_PARAM(cmos);
11579 TPACPI_PARAM(led);
11580 TPACPI_PARAM(beep);
11581 TPACPI_PARAM(brightness);
11582 TPACPI_PARAM(volume);
11583 TPACPI_PARAM(fan);
11584
11585 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
11586 module_param(dbg_wlswemul, uint, 0444);
11587 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
11588 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
11589 MODULE_PARM_DESC(wlsw_state,
11590 "Initial state of the emulated WLSW switch");
11591
11592 module_param(dbg_bluetoothemul, uint, 0444);
11593 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
11594 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
11595 MODULE_PARM_DESC(bluetooth_state,
11596 "Initial state of the emulated bluetooth switch");
11597
11598 module_param(dbg_wwanemul, uint, 0444);
11599 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
11600 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
11601 MODULE_PARM_DESC(wwan_state,
11602 "Initial state of the emulated WWAN switch");
11603
11604 module_param(dbg_uwbemul, uint, 0444);
11605 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
11606 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
11607 MODULE_PARM_DESC(uwb_state,
11608 "Initial state of the emulated UWB switch");
11609 #endif
11610
11611 module_param(profile_force, int, 0444);
11612 MODULE_PARM_DESC(profile_force, "Force profile mode. -1=off, 1=MMC, 2=PSC");
11613
thinkpad_acpi_module_exit(void)11614 static void thinkpad_acpi_module_exit(void)
11615 {
11616 struct ibm_struct *ibm, *itmp;
11617
11618 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
11619
11620 if (tpacpi_hwmon)
11621 hwmon_device_unregister(tpacpi_hwmon);
11622 if (tp_features.sensors_pdrv_registered)
11623 platform_driver_unregister(&tpacpi_hwmon_pdriver);
11624 if (tp_features.platform_drv_registered)
11625 platform_driver_unregister(&tpacpi_pdriver);
11626
11627 list_for_each_entry_safe_reverse(ibm, itmp,
11628 &tpacpi_all_drivers,
11629 all_drivers) {
11630 ibm_exit(ibm);
11631 }
11632
11633 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
11634
11635 if (tpacpi_inputdev) {
11636 if (tp_features.input_device_registered)
11637 input_unregister_device(tpacpi_inputdev);
11638 else
11639 input_free_device(tpacpi_inputdev);
11640 kfree(hotkey_keycode_map);
11641 }
11642
11643 if (tpacpi_sensors_pdev)
11644 platform_device_unregister(tpacpi_sensors_pdev);
11645 if (tpacpi_pdev)
11646 platform_device_unregister(tpacpi_pdev);
11647 if (proc_dir)
11648 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
11649 if (tpacpi_wq)
11650 destroy_workqueue(tpacpi_wq);
11651
11652 kfree(thinkpad_id.bios_version_str);
11653 kfree(thinkpad_id.ec_version_str);
11654 kfree(thinkpad_id.model_str);
11655 kfree(thinkpad_id.nummodel_str);
11656 }
11657
11658
thinkpad_acpi_module_init(void)11659 static int __init thinkpad_acpi_module_init(void)
11660 {
11661 const struct dmi_system_id *dmi_id;
11662 int ret, i;
11663 acpi_object_type obj_type;
11664
11665 tpacpi_lifecycle = TPACPI_LIFE_INIT;
11666
11667 /* Driver-level probe */
11668
11669 ret = get_thinkpad_model_data(&thinkpad_id);
11670 if (ret) {
11671 pr_err("unable to get DMI data: %d\n", ret);
11672 thinkpad_acpi_module_exit();
11673 return ret;
11674 }
11675 ret = probe_for_thinkpad();
11676 if (ret) {
11677 thinkpad_acpi_module_exit();
11678 return ret;
11679 }
11680
11681 /* Driver initialization */
11682
11683 thinkpad_acpi_init_banner();
11684 tpacpi_check_outdated_fw();
11685
11686 TPACPI_ACPIHANDLE_INIT(ecrd);
11687 TPACPI_ACPIHANDLE_INIT(ecwr);
11688
11689 /*
11690 * Quirk: in some models (e.g. X380 Yoga), an object named ECRD
11691 * exists, but it is a register, not a method.
11692 */
11693 if (ecrd_handle) {
11694 acpi_get_type(ecrd_handle, &obj_type);
11695 if (obj_type != ACPI_TYPE_METHOD)
11696 ecrd_handle = NULL;
11697 }
11698 if (ecwr_handle) {
11699 acpi_get_type(ecwr_handle, &obj_type);
11700 if (obj_type != ACPI_TYPE_METHOD)
11701 ecwr_handle = NULL;
11702 }
11703
11704 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
11705 if (!tpacpi_wq) {
11706 thinkpad_acpi_module_exit();
11707 return -ENOMEM;
11708 }
11709
11710 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
11711 if (!proc_dir) {
11712 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
11713 thinkpad_acpi_module_exit();
11714 return -ENODEV;
11715 }
11716
11717 dmi_id = dmi_first_match(fwbug_list);
11718 if (dmi_id)
11719 tp_features.quirks = dmi_id->driver_data;
11720
11721 /* Device initialization */
11722 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, PLATFORM_DEVID_NONE,
11723 NULL, 0);
11724 if (IS_ERR(tpacpi_pdev)) {
11725 ret = PTR_ERR(tpacpi_pdev);
11726 tpacpi_pdev = NULL;
11727 pr_err("unable to register platform device\n");
11728 thinkpad_acpi_module_exit();
11729 return ret;
11730 }
11731 tpacpi_sensors_pdev = platform_device_register_simple(
11732 TPACPI_HWMON_DRVR_NAME,
11733 PLATFORM_DEVID_NONE, NULL, 0);
11734 if (IS_ERR(tpacpi_sensors_pdev)) {
11735 ret = PTR_ERR(tpacpi_sensors_pdev);
11736 tpacpi_sensors_pdev = NULL;
11737 pr_err("unable to register hwmon platform device\n");
11738 thinkpad_acpi_module_exit();
11739 return ret;
11740 }
11741
11742 mutex_init(&tpacpi_inputdev_send_mutex);
11743 tpacpi_inputdev = input_allocate_device();
11744 if (!tpacpi_inputdev) {
11745 thinkpad_acpi_module_exit();
11746 return -ENOMEM;
11747 } else {
11748 /* Prepare input device, but don't register */
11749 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
11750 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
11751 tpacpi_inputdev->id.bustype = BUS_HOST;
11752 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
11753 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
11754 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
11755 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
11756 }
11757
11758 /* Init subdriver dependencies */
11759 tpacpi_detect_brightness_capabilities();
11760
11761 /* Init subdrivers */
11762 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
11763 ret = ibm_init(&ibms_init[i]);
11764 if (ret >= 0 && *ibms_init[i].param)
11765 ret = ibms_init[i].data->write(ibms_init[i].param);
11766 if (ret < 0) {
11767 thinkpad_acpi_module_exit();
11768 return ret;
11769 }
11770 }
11771
11772 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
11773
11774 ret = platform_driver_register(&tpacpi_pdriver);
11775 if (ret) {
11776 pr_err("unable to register main platform driver\n");
11777 thinkpad_acpi_module_exit();
11778 return ret;
11779 }
11780 tp_features.platform_drv_registered = 1;
11781
11782 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
11783 if (ret) {
11784 pr_err("unable to register hwmon platform driver\n");
11785 thinkpad_acpi_module_exit();
11786 return ret;
11787 }
11788 tp_features.sensors_pdrv_registered = 1;
11789
11790 tpacpi_hwmon = hwmon_device_register_with_groups(
11791 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, tpacpi_hwmon_groups);
11792 if (IS_ERR(tpacpi_hwmon)) {
11793 ret = PTR_ERR(tpacpi_hwmon);
11794 tpacpi_hwmon = NULL;
11795 pr_err("unable to register hwmon device\n");
11796 thinkpad_acpi_module_exit();
11797 return ret;
11798 }
11799
11800 ret = input_register_device(tpacpi_inputdev);
11801 if (ret < 0) {
11802 pr_err("unable to register input device\n");
11803 thinkpad_acpi_module_exit();
11804 return ret;
11805 } else {
11806 tp_features.input_device_registered = 1;
11807 }
11808
11809 return 0;
11810 }
11811
11812 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
11813
11814 /*
11815 * This will autoload the driver in almost every ThinkPad
11816 * in widespread use.
11817 *
11818 * Only _VERY_ old models, like the 240, 240x and 570 lack
11819 * the HKEY event interface.
11820 */
11821 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
11822
11823 /*
11824 * DMI matching for module autoloading
11825 *
11826 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
11827 * See https://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
11828 *
11829 * Only models listed in thinkwiki will be supported, so add yours
11830 * if it is not there yet.
11831 */
11832 #define IBM_BIOS_MODULE_ALIAS(__type) \
11833 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
11834
11835 /* Ancient thinkpad BIOSes have to be identified by
11836 * BIOS type or model number, and there are far less
11837 * BIOS types than model numbers... */
11838 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
11839
11840 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
11841 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
11842 MODULE_DESCRIPTION(TPACPI_DESC);
11843 MODULE_VERSION(TPACPI_VERSION);
11844 MODULE_LICENSE("GPL");
11845
11846 module_init(thinkpad_acpi_module_init);
11847 module_exit(thinkpad_acpi_module_exit);
11848