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 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3046 mutex_lock(&hotkey_mutex);
3047 hotkey_poll_stop_sync();
3048 mutex_unlock(&hotkey_mutex);
3049 #endif
3050 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3051 "restoring original HKEY status and mask\n");
3052 /* yes, there is a bitwise or below, we want the
3053 * functions to be called even if one of them fail */
3054 if (((tp_features.hotkey_mask &&
3055 hotkey_mask_set(hotkey_orig_mask)) |
3056 hotkey_status_set(false)) != 0)
3057 pr_err("failed to restore hot key mask to BIOS defaults\n");
3058 }
3059
hotkey_unmap(const unsigned int scancode)3060 static void __init hotkey_unmap(const unsigned int scancode)
3061 {
3062 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3063 clear_bit(hotkey_keycode_map[scancode],
3064 tpacpi_inputdev->keybit);
3065 hotkey_keycode_map[scancode] = KEY_RESERVED;
3066 }
3067 }
3068
3069 /*
3070 * HKEY quirks:
3071 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3072 */
3073
3074 #define TPACPI_HK_Q_INIMASK 0x0001
3075
3076 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3077 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3078 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3079 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3080 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3081 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3082 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3083 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3084 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3085 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3086 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3087 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3088 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3089 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3090 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3091 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3092 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3093 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3094 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3095 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3096 };
3097
3098 typedef u16 tpacpi_keymap_entry_t;
3099 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3100
hotkey_init_tablet_mode(void)3101 static int hotkey_init_tablet_mode(void)
3102 {
3103 int in_tablet_mode = 0, res;
3104 char *type = NULL;
3105
3106 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) {
3107 int has_tablet_mode;
3108
3109 in_tablet_mode = hotkey_gmms_get_tablet_mode(res,
3110 &has_tablet_mode);
3111 /*
3112 * The Yoga 11e series has 2 accelerometers described by a
3113 * BOSC0200 ACPI node. This setup relies on a Windows service
3114 * which calls special ACPI methods on this node to report
3115 * the laptop/tent/tablet mode to the EC. The bmc150 iio driver
3116 * does not support this, so skip the hotkey on these models.
3117 */
3118 if (has_tablet_mode && !dual_accel_detect())
3119 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS;
3120 type = "GMMS";
3121 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
3122 /* For X41t, X60t, X61t Tablets... */
3123 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
3124 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
3125 type = "MHKG";
3126 }
3127
3128 if (!tp_features.hotkey_tablet)
3129 return 0;
3130
3131 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
3132 type, in_tablet_mode ? "tablet" : "laptop");
3133
3134 return in_tablet_mode;
3135 }
3136
hotkey_init(struct ibm_init_struct * iibm)3137 static int __init hotkey_init(struct ibm_init_struct *iibm)
3138 {
3139 /* Requirements for changing the default keymaps:
3140 *
3141 * 1. Many of the keys are mapped to KEY_RESERVED for very
3142 * good reasons. Do not change them unless you have deep
3143 * knowledge on the IBM and Lenovo ThinkPad firmware for
3144 * the various ThinkPad models. The driver behaves
3145 * differently for KEY_RESERVED: such keys have their
3146 * hot key mask *unset* in mask_recommended, and also
3147 * in the initial hot key mask programmed into the
3148 * firmware at driver load time, which means the firm-
3149 * ware may react very differently if you change them to
3150 * something else;
3151 *
3152 * 2. You must be subscribed to the linux-thinkpad and
3153 * ibm-acpi-devel mailing lists, and you should read the
3154 * list archives since 2007 if you want to change the
3155 * keymaps. This requirement exists so that you will
3156 * know the past history of problems with the thinkpad-
3157 * acpi driver keymaps, and also that you will be
3158 * listening to any bug reports;
3159 *
3160 * 3. Do not send thinkpad-acpi specific patches directly to
3161 * for merging, *ever*. Send them to the linux-acpi
3162 * mailinglist for comments. Merging is to be done only
3163 * through acpi-test and the ACPI maintainer.
3164 *
3165 * If the above is too much to ask, don't change the keymap.
3166 * Ask the thinkpad-acpi maintainer to do it, instead.
3167 */
3168
3169 enum keymap_index {
3170 TPACPI_KEYMAP_IBM_GENERIC = 0,
3171 TPACPI_KEYMAP_LENOVO_GENERIC,
3172 };
3173
3174 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3175 /* Generic keymap for IBM ThinkPads */
3176 [TPACPI_KEYMAP_IBM_GENERIC] = {
3177 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3178 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3179 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3180 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3181
3182 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3183 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3184 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3185 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3186
3187 /* brightness: firmware always reacts to them */
3188 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3189 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3190
3191 /* Thinklight: firmware always react to it */
3192 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3193
3194 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3195 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3196
3197 /* Volume: firmware always react to it and reprograms
3198 * the built-in *extra* mixer. Never map it to control
3199 * another mixer by default. */
3200 KEY_RESERVED, /* 0x14: VOLUME UP */
3201 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3202 KEY_RESERVED, /* 0x16: MUTE */
3203
3204 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3205
3206 /* (assignments unknown, please report if found) */
3207 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3208 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3209
3210 /* No assignments, only used for Adaptive keyboards. */
3211 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
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,
3216
3217 /* No assignment, used for newer Lenovo models */
3218 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
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
3224
3225 },
3226
3227 /* Generic keymap for Lenovo ThinkPads */
3228 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3229 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3230 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3231 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3232 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3233
3234 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3235 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3236 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3237 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3238
3239 /* These should be enabled --only-- when ACPI video
3240 * is disabled (i.e. in "vendor" mode), and are handled
3241 * in a special way by the init code */
3242 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3243 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3244
3245 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3246
3247 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3248 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3249
3250 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3251 * react to it and reprograms the built-in *extra* mixer.
3252 * Never map it to control another mixer by default.
3253 *
3254 * T60?, T61, R60?, R61: firmware and EC tries to send
3255 * these over the regular keyboard, so these are no-ops,
3256 * but there are still weird bugs re. MUTE, so do not
3257 * change unless you get test reports from all Lenovo
3258 * models. May cause the BIOS to interfere with the
3259 * HDA mixer.
3260 */
3261 KEY_RESERVED, /* 0x14: VOLUME UP */
3262 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3263 KEY_RESERVED, /* 0x16: MUTE */
3264
3265 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3266
3267 /* (assignments unknown, please report if found) */
3268 KEY_UNKNOWN, KEY_UNKNOWN,
3269
3270 /*
3271 * The mic mute button only sends 0x1a. It does not
3272 * automatically mute the mic or change the mute light.
3273 */
3274 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3275
3276 /* (assignments unknown, please report if found) */
3277 KEY_UNKNOWN,
3278
3279 /* Extra keys in use since the X240 / T440 / T540 */
3280 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3281
3282 /*
3283 * These are the adaptive keyboard keycodes for Carbon X1 2014.
3284 * The first item in this list is the Mute button which is
3285 * emitted with 0x103 through
3286 * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3287 * symbol is held.
3288 * We'll need to offset those by 0x20.
3289 */
3290 KEY_RESERVED, /* Mute held, 0x103 */
3291 KEY_BRIGHTNESS_MIN, /* Backlight off */
3292 KEY_RESERVED, /* Clipping tool */
3293 KEY_RESERVED, /* Cloud */
3294 KEY_RESERVED,
3295 KEY_VOICECOMMAND, /* Voice */
3296 KEY_RESERVED,
3297 KEY_RESERVED, /* Gestures */
3298 KEY_RESERVED,
3299 KEY_RESERVED,
3300 KEY_RESERVED,
3301 KEY_CONFIG, /* Settings */
3302 KEY_RESERVED, /* New tab */
3303 KEY_REFRESH, /* Reload */
3304 KEY_BACK, /* Back */
3305 KEY_RESERVED, /* Microphone down */
3306 KEY_RESERVED, /* Microphone up */
3307 KEY_RESERVED, /* Microphone cancellation */
3308 KEY_RESERVED, /* Camera mode */
3309 KEY_RESERVED, /* Rotate display, 0x116 */
3310
3311 /*
3312 * These are found in 2017 models (e.g. T470s, X270).
3313 * The lowest known value is 0x311, which according to
3314 * the manual should launch a user defined favorite
3315 * application.
3316 *
3317 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START,
3318 * corresponding to 0x34.
3319 */
3320
3321 /* (assignments unknown, please report if found) */
3322 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
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,
3327
3328 KEY_BOOKMARKS, /* Favorite app, 0x311 */
3329 KEY_SELECTIVE_SCREENSHOT, /* Clipping tool */
3330 KEY_CALC, /* Calculator (above numpad, P52) */
3331 KEY_BLUETOOTH, /* Bluetooth */
3332 KEY_KEYBOARD, /* Keyboard, 0x315 */
3333 KEY_FN_RIGHT_SHIFT, /* Fn + right Shift */
3334 KEY_NOTIFICATION_CENTER, /* Notification Center */
3335 KEY_PICKUP_PHONE, /* Answer incoming call */
3336 KEY_HANGUP_PHONE, /* Decline incoming call */
3337 },
3338 };
3339
3340 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3341 /* Generic maps (fallback) */
3342 {
3343 .vendor = PCI_VENDOR_ID_IBM,
3344 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3345 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3346 },
3347 {
3348 .vendor = PCI_VENDOR_ID_LENOVO,
3349 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3350 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3351 },
3352 };
3353
3354 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3355 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3356
3357 int res, i;
3358 int status;
3359 int hkeyv;
3360 bool radiosw_state = false;
3361 bool tabletsw_state = false;
3362
3363 unsigned long quirks;
3364 unsigned long keymap_id;
3365
3366 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3367 "initializing hotkey subdriver\n");
3368
3369 BUG_ON(!tpacpi_inputdev);
3370 BUG_ON(tpacpi_inputdev->open != NULL ||
3371 tpacpi_inputdev->close != NULL);
3372
3373 TPACPI_ACPIHANDLE_INIT(hkey);
3374 mutex_init(&hotkey_mutex);
3375
3376 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3377 mutex_init(&hotkey_thread_data_mutex);
3378 #endif
3379
3380 /* hotkey not supported on 570 */
3381 tp_features.hotkey = hkey_handle != NULL;
3382
3383 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3384 "hotkeys are %s\n",
3385 str_supported(tp_features.hotkey));
3386
3387 if (!tp_features.hotkey)
3388 return -ENODEV;
3389
3390 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3391 ARRAY_SIZE(tpacpi_hotkey_qtable));
3392
3393 tpacpi_disable_brightness_delay();
3394
3395 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3396 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3397 for HKEY interface version 0x100 */
3398 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3399 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3400 "firmware HKEY interface version: 0x%x\n",
3401 hkeyv);
3402
3403 switch (hkeyv >> 8) {
3404 case 1:
3405 /*
3406 * MHKV 0x100 in A31, R40, R40e,
3407 * T4x, X31, and later
3408 */
3409
3410 /* Paranoia check AND init hotkey_all_mask */
3411 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3412 "MHKA", "qd")) {
3413 pr_err("missing MHKA handler, please report this to %s\n",
3414 TPACPI_MAIL);
3415 /* Fallback: pre-init for FN+F3,F4,F12 */
3416 hotkey_all_mask = 0x080cU;
3417 } else {
3418 tp_features.hotkey_mask = 1;
3419 }
3420 break;
3421
3422 case 2:
3423 /*
3424 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016)
3425 */
3426
3427 /* Paranoia check AND init hotkey_all_mask */
3428 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3429 "MHKA", "dd", 1)) {
3430 pr_err("missing MHKA handler, please report this to %s\n",
3431 TPACPI_MAIL);
3432 /* Fallback: pre-init for FN+F3,F4,F12 */
3433 hotkey_all_mask = 0x080cU;
3434 } else {
3435 tp_features.hotkey_mask = 1;
3436 }
3437
3438 /*
3439 * Check if we have an adaptive keyboard, like on the
3440 * Lenovo Carbon X1 2014 (2nd Gen).
3441 */
3442 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
3443 "MHKA", "dd", 2)) {
3444 if (hotkey_adaptive_all_mask != 0)
3445 tp_features.has_adaptive_kbd = true;
3446 } else {
3447 tp_features.has_adaptive_kbd = false;
3448 hotkey_adaptive_all_mask = 0x0U;
3449 }
3450 break;
3451
3452 default:
3453 pr_err("unknown version of the HKEY interface: 0x%x\n",
3454 hkeyv);
3455 pr_err("please report this to %s\n", TPACPI_MAIL);
3456 break;
3457 }
3458 }
3459
3460 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3461 "hotkey masks are %s\n",
3462 str_supported(tp_features.hotkey_mask));
3463
3464 /* Init hotkey_all_mask if not initialized yet */
3465 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3466 (quirks & TPACPI_HK_Q_INIMASK))
3467 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3468
3469 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3470 if (tp_features.hotkey_mask) {
3471 /* hotkey_source_mask *must* be zero for
3472 * the first hotkey_mask_get to return hotkey_orig_mask */
3473 mutex_lock(&hotkey_mutex);
3474 res = hotkey_mask_get();
3475 mutex_unlock(&hotkey_mutex);
3476 if (res)
3477 return res;
3478
3479 hotkey_orig_mask = hotkey_acpi_mask;
3480 } else {
3481 hotkey_orig_mask = hotkey_all_mask;
3482 hotkey_acpi_mask = hotkey_all_mask;
3483 }
3484
3485 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3486 if (dbg_wlswemul) {
3487 tp_features.hotkey_wlsw = 1;
3488 radiosw_state = !!tpacpi_wlsw_emulstate;
3489 pr_info("radio switch emulation enabled\n");
3490 } else
3491 #endif
3492 /* Not all thinkpads have a hardware radio switch */
3493 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3494 tp_features.hotkey_wlsw = 1;
3495 radiosw_state = !!status;
3496 pr_info("radio switch found; radios are %s\n", str_enabled_disabled(status & BIT(0)));
3497 }
3498
3499 tabletsw_state = hotkey_init_tablet_mode();
3500
3501 /* Set up key map */
3502 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3503 ARRAY_SIZE(tpacpi_keymap_qtable));
3504 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3505 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3506 "using keymap number %lu\n", keymap_id);
3507
3508 hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id],
3509 TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL);
3510 if (!hotkey_keycode_map) {
3511 pr_err("failed to allocate memory for key map\n");
3512 return -ENOMEM;
3513 }
3514
3515 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3516 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3517 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3518 tpacpi_inputdev->keycode = hotkey_keycode_map;
3519 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3520 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3521 input_set_capability(tpacpi_inputdev, EV_KEY,
3522 hotkey_keycode_map[i]);
3523 } else {
3524 if (i < sizeof(hotkey_reserved_mask)*8)
3525 hotkey_reserved_mask |= 1 << i;
3526 }
3527 }
3528
3529 if (tp_features.hotkey_wlsw) {
3530 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3531 input_report_switch(tpacpi_inputdev,
3532 SW_RFKILL_ALL, radiosw_state);
3533 }
3534 if (tp_features.hotkey_tablet) {
3535 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3536 input_report_switch(tpacpi_inputdev,
3537 SW_TABLET_MODE, tabletsw_state);
3538 }
3539
3540 /* Do not issue duplicate brightness change events to
3541 * userspace. tpacpi_detect_brightness_capabilities() must have
3542 * been called before this point */
3543 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3544 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
3545 pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
3546
3547 /* Disable brightness up/down on Lenovo thinkpads when
3548 * ACPI is handling them, otherwise it is plain impossible
3549 * for userspace to do something even remotely sane */
3550 hotkey_reserved_mask |=
3551 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3552 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3553 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3554 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3555 }
3556
3557 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3558 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3559 & ~hotkey_all_mask
3560 & ~hotkey_reserved_mask;
3561
3562 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3563 "hotkey source mask 0x%08x, polling freq %u\n",
3564 hotkey_source_mask, hotkey_poll_freq);
3565 #endif
3566
3567 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3568 "enabling firmware HKEY event interface...\n");
3569 res = hotkey_status_set(true);
3570 if (res) {
3571 hotkey_exit();
3572 return res;
3573 }
3574 mutex_lock(&hotkey_mutex);
3575 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3576 | hotkey_driver_mask)
3577 & ~hotkey_source_mask);
3578 mutex_unlock(&hotkey_mutex);
3579 if (res < 0 && res != -ENXIO) {
3580 hotkey_exit();
3581 return res;
3582 }
3583 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3584 & ~hotkey_reserved_mask;
3585 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3586 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3587 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3588
3589 tpacpi_inputdev->open = &hotkey_inputdev_open;
3590 tpacpi_inputdev->close = &hotkey_inputdev_close;
3591
3592 hotkey_poll_setup_safe(true);
3593
3594 return 0;
3595 }
3596
3597 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3598 * mode, Web conference mode, Function mode and Lay-flat mode.
3599 * We support Home mode and Function mode currently.
3600 *
3601 * Will consider support rest of modes in future.
3602 *
3603 */
3604 static const int adaptive_keyboard_modes[] = {
3605 HOME_MODE,
3606 /* WEB_BROWSER_MODE = 2,
3607 WEB_CONFERENCE_MODE = 3, */
3608 FUNCTION_MODE
3609 };
3610
3611 #define DFR_CHANGE_ROW 0x101
3612 #define DFR_SHOW_QUICKVIEW_ROW 0x102
3613 #define FIRST_ADAPTIVE_KEY 0x103
3614
3615 /* press Fn key a while second, it will switch to Function Mode. Then
3616 * release Fn key, previous mode be restored.
3617 */
3618 static bool adaptive_keyboard_mode_is_saved;
3619 static int adaptive_keyboard_prev_mode;
3620
adaptive_keyboard_get_mode(void)3621 static int adaptive_keyboard_get_mode(void)
3622 {
3623 int mode = 0;
3624
3625 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3626 pr_err("Cannot read adaptive keyboard mode\n");
3627 return -EIO;
3628 }
3629
3630 return mode;
3631 }
3632
adaptive_keyboard_set_mode(int new_mode)3633 static int adaptive_keyboard_set_mode(int new_mode)
3634 {
3635 if (new_mode < 0 ||
3636 new_mode > LAYFLAT_MODE)
3637 return -EINVAL;
3638
3639 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3640 pr_err("Cannot set adaptive keyboard mode\n");
3641 return -EIO;
3642 }
3643
3644 return 0;
3645 }
3646
adaptive_keyboard_get_next_mode(int mode)3647 static int adaptive_keyboard_get_next_mode(int mode)
3648 {
3649 size_t i;
3650 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3651
3652 for (i = 0; i <= max_mode; i++) {
3653 if (adaptive_keyboard_modes[i] == mode)
3654 break;
3655 }
3656
3657 if (i >= max_mode)
3658 i = 0;
3659 else
3660 i++;
3661
3662 return adaptive_keyboard_modes[i];
3663 }
3664
adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)3665 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3666 {
3667 int current_mode = 0;
3668 int new_mode = 0;
3669 int keycode;
3670
3671 switch (scancode) {
3672 case DFR_CHANGE_ROW:
3673 if (adaptive_keyboard_mode_is_saved) {
3674 new_mode = adaptive_keyboard_prev_mode;
3675 adaptive_keyboard_mode_is_saved = false;
3676 } else {
3677 current_mode = adaptive_keyboard_get_mode();
3678 if (current_mode < 0)
3679 return false;
3680 new_mode = adaptive_keyboard_get_next_mode(
3681 current_mode);
3682 }
3683
3684 if (adaptive_keyboard_set_mode(new_mode) < 0)
3685 return false;
3686
3687 return true;
3688
3689 case DFR_SHOW_QUICKVIEW_ROW:
3690 current_mode = adaptive_keyboard_get_mode();
3691 if (current_mode < 0)
3692 return false;
3693
3694 adaptive_keyboard_prev_mode = current_mode;
3695 adaptive_keyboard_mode_is_saved = true;
3696
3697 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3698 return false;
3699 return true;
3700
3701 default:
3702 if (scancode < FIRST_ADAPTIVE_KEY ||
3703 scancode >= FIRST_ADAPTIVE_KEY +
3704 TP_ACPI_HOTKEYSCAN_EXTENDED_START -
3705 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3706 pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3707 scancode);
3708 return false;
3709 }
3710 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
3711 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START];
3712 if (keycode != KEY_RESERVED) {
3713 mutex_lock(&tpacpi_inputdev_send_mutex);
3714
3715 input_report_key(tpacpi_inputdev, keycode, 1);
3716 input_sync(tpacpi_inputdev);
3717
3718 input_report_key(tpacpi_inputdev, keycode, 0);
3719 input_sync(tpacpi_inputdev);
3720
3721 mutex_unlock(&tpacpi_inputdev_send_mutex);
3722 }
3723 return true;
3724 }
3725 }
3726
hotkey_notify_extended_hotkey(const u32 hkey)3727 static bool hotkey_notify_extended_hotkey(const u32 hkey)
3728 {
3729 unsigned int scancode;
3730
3731 switch (hkey) {
3732 case TP_HKEY_EV_PRIVACYGUARD_TOGGLE:
3733 case TP_HKEY_EV_AMT_TOGGLE:
3734 tpacpi_driver_event(hkey);
3735 return true;
3736 }
3737
3738 /* Extended keycodes start at 0x300 and our offset into the map
3739 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode
3740 * will be positive, but might not be in the correct range.
3741 */
3742 scancode = (hkey & 0xfff) - (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START);
3743 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START &&
3744 scancode < TPACPI_HOTKEY_MAP_LEN) {
3745 tpacpi_input_send_key(scancode);
3746 return true;
3747 }
3748
3749 return false;
3750 }
3751
hotkey_notify_hotkey(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3752 static bool hotkey_notify_hotkey(const u32 hkey,
3753 bool *send_acpi_ev,
3754 bool *ignore_acpi_ev)
3755 {
3756 /* 0x1000-0x1FFF: key presses */
3757 unsigned int scancode = hkey & 0xfff;
3758 *send_acpi_ev = true;
3759 *ignore_acpi_ev = false;
3760
3761 /*
3762 * Original events are in the 0x10XX range, the adaptive keyboard
3763 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017
3764 * models, additional keys are emitted through 0x13XX.
3765 */
3766 switch ((hkey >> 8) & 0xf) {
3767 case 0:
3768 if (scancode > 0 &&
3769 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3770 /* HKEY event 0x1001 is scancode 0x00 */
3771 scancode--;
3772 if (!(hotkey_source_mask & (1 << scancode))) {
3773 tpacpi_input_send_key_masked(scancode);
3774 *send_acpi_ev = false;
3775 } else {
3776 *ignore_acpi_ev = true;
3777 }
3778 return true;
3779 }
3780 break;
3781
3782 case 1:
3783 return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3784
3785 case 3:
3786 return hotkey_notify_extended_hotkey(hkey);
3787 }
3788
3789 return false;
3790 }
3791
hotkey_notify_wakeup(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3792 static bool hotkey_notify_wakeup(const u32 hkey,
3793 bool *send_acpi_ev,
3794 bool *ignore_acpi_ev)
3795 {
3796 /* 0x2000-0x2FFF: Wakeup reason */
3797 *send_acpi_ev = true;
3798 *ignore_acpi_ev = false;
3799
3800 switch (hkey) {
3801 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3802 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3803 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3804 *ignore_acpi_ev = true;
3805 break;
3806
3807 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3808 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3809 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3810 *ignore_acpi_ev = true;
3811 break;
3812
3813 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3814 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3815 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3816 /* how to auto-heal: */
3817 /* 2313: woke up from S3, go to S4/S5 */
3818 /* 2413: woke up from S4, go to S5 */
3819 break;
3820
3821 default:
3822 return false;
3823 }
3824
3825 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3826 pr_info("woke up due to a hot-unplug request...\n");
3827 hotkey_wakeup_reason_notify_change();
3828 }
3829 return true;
3830 }
3831
hotkey_notify_dockevent(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3832 static bool hotkey_notify_dockevent(const u32 hkey,
3833 bool *send_acpi_ev,
3834 bool *ignore_acpi_ev)
3835 {
3836 /* 0x4000-0x4FFF: dock-related events */
3837 *send_acpi_ev = true;
3838 *ignore_acpi_ev = false;
3839
3840 switch (hkey) {
3841 case TP_HKEY_EV_UNDOCK_ACK:
3842 /* ACPI undock operation completed after wakeup */
3843 hotkey_autosleep_ack = 1;
3844 pr_info("undocked\n");
3845 hotkey_wakeup_hotunplug_complete_notify_change();
3846 return true;
3847
3848 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3849 pr_info("docked into hotplug port replicator\n");
3850 return true;
3851 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3852 pr_info("undocked from hotplug port replicator\n");
3853 return true;
3854
3855 /*
3856 * Deliberately ignore attaching and detaching the keybord cover to avoid
3857 * duplicates from intel-vbtn, which already emits SW_TABLET_MODE events
3858 * to userspace.
3859 *
3860 * Please refer to the following thread for more information and a preliminary
3861 * implementation using the GTOP ("Get Tablet OPtions") interface that could be
3862 * extended to other attachment options of the ThinkPad X1 Tablet series, such as
3863 * the Pico cartridge dock module:
3864 * https://lore.kernel.org/platform-driver-x86/38cb8265-1e30-d547-9e12-b4ae290be737@a-kobel.de/
3865 */
3866 case TP_HKEY_EV_KBD_COVER_ATTACH:
3867 case TP_HKEY_EV_KBD_COVER_DETACH:
3868 *send_acpi_ev = false;
3869 *ignore_acpi_ev = true;
3870 return true;
3871
3872 default:
3873 return false;
3874 }
3875 }
3876
hotkey_notify_usrevent(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3877 static bool hotkey_notify_usrevent(const u32 hkey,
3878 bool *send_acpi_ev,
3879 bool *ignore_acpi_ev)
3880 {
3881 /* 0x5000-0x5FFF: human interface helpers */
3882 *send_acpi_ev = true;
3883 *ignore_acpi_ev = false;
3884
3885 switch (hkey) {
3886 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3887 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3888 return true;
3889
3890 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3891 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3892 tpacpi_input_send_tabletsw();
3893 hotkey_tablet_mode_notify_change();
3894 *send_acpi_ev = false;
3895 return true;
3896
3897 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3898 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3899 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3900 /* do not propagate these events */
3901 *ignore_acpi_ev = true;
3902 return true;
3903
3904 default:
3905 return false;
3906 }
3907 }
3908
3909 static void thermal_dump_all_sensors(void);
3910 static void palmsensor_refresh(void);
3911
hotkey_notify_6xxx(const u32 hkey,bool * send_acpi_ev,bool * ignore_acpi_ev)3912 static bool hotkey_notify_6xxx(const u32 hkey,
3913 bool *send_acpi_ev,
3914 bool *ignore_acpi_ev)
3915 {
3916 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3917 *send_acpi_ev = true;
3918 *ignore_acpi_ev = false;
3919
3920 switch (hkey) {
3921 case TP_HKEY_EV_THM_TABLE_CHANGED:
3922 pr_debug("EC reports: Thermal Table has changed\n");
3923 /* recommended action: do nothing, we don't have
3924 * Lenovo ATM information */
3925 return true;
3926 case TP_HKEY_EV_THM_CSM_COMPLETED:
3927 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n");
3928 /* Thermal event - pass on to event handler */
3929 tpacpi_driver_event(hkey);
3930 return true;
3931 case TP_HKEY_EV_THM_TRANSFM_CHANGED:
3932 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n");
3933 /* recommended action: do nothing, we don't have
3934 * Lenovo ATM information */
3935 return true;
3936 case TP_HKEY_EV_ALARM_BAT_HOT:
3937 pr_crit("THERMAL ALARM: battery is too hot!\n");
3938 /* recommended action: warn user through gui */
3939 break;
3940 case TP_HKEY_EV_ALARM_BAT_XHOT:
3941 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3942 /* recommended action: immediate sleep/hibernate */
3943 break;
3944 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3945 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
3946 /* recommended action: warn user through gui, that */
3947 /* some internal component is too hot */
3948 break;
3949 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3950 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
3951 /* recommended action: immediate sleep/hibernate */
3952 break;
3953 case TP_HKEY_EV_AC_CHANGED:
3954 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3955 * AC status changed; can be triggered by plugging or
3956 * unplugging AC adapter, docking or undocking. */
3957
3958 fallthrough;
3959
3960 case TP_HKEY_EV_KEY_NUMLOCK:
3961 case TP_HKEY_EV_KEY_FN:
3962 /* key press events, we just ignore them as long as the EC
3963 * is still reporting them in the normal keyboard stream */
3964 *send_acpi_ev = false;
3965 *ignore_acpi_ev = true;
3966 return true;
3967
3968 case TP_HKEY_EV_KEY_FN_ESC:
3969 /* Get the media key status to force the status LED to update */
3970 acpi_evalf(hkey_handle, NULL, "GMKS", "v");
3971 *send_acpi_ev = false;
3972 *ignore_acpi_ev = true;
3973 return true;
3974
3975 case TP_HKEY_EV_TABLET_CHANGED:
3976 tpacpi_input_send_tabletsw();
3977 hotkey_tablet_mode_notify_change();
3978 *send_acpi_ev = false;
3979 return true;
3980
3981 case TP_HKEY_EV_PALM_DETECTED:
3982 case TP_HKEY_EV_PALM_UNDETECTED:
3983 /* palm detected - pass on to event handler */
3984 palmsensor_refresh();
3985 return true;
3986
3987 default:
3988 /* report simply as unknown, no sensor dump */
3989 return false;
3990 }
3991
3992 thermal_dump_all_sensors();
3993 return true;
3994 }
3995
hotkey_notify(struct ibm_struct * ibm,u32 event)3996 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3997 {
3998 u32 hkey;
3999 bool send_acpi_ev;
4000 bool ignore_acpi_ev;
4001 bool known_ev;
4002
4003 if (event != 0x80) {
4004 pr_err("unknown HKEY notification event %d\n", event);
4005 /* forward it to userspace, maybe it knows how to handle it */
4006 acpi_bus_generate_netlink_event(
4007 ibm->acpi->device->pnp.device_class,
4008 dev_name(&ibm->acpi->device->dev),
4009 event, 0);
4010 return;
4011 }
4012
4013 while (1) {
4014 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
4015 pr_err("failed to retrieve HKEY event\n");
4016 return;
4017 }
4018
4019 if (hkey == 0) {
4020 /* queue empty */
4021 return;
4022 }
4023
4024 send_acpi_ev = true;
4025 ignore_acpi_ev = false;
4026
4027 switch (hkey >> 12) {
4028 case 1:
4029 /* 0x1000-0x1FFF: key presses */
4030 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
4031 &ignore_acpi_ev);
4032 break;
4033 case 2:
4034 /* 0x2000-0x2FFF: Wakeup reason */
4035 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
4036 &ignore_acpi_ev);
4037 break;
4038 case 3:
4039 /* 0x3000-0x3FFF: bay-related wakeups */
4040 switch (hkey) {
4041 case TP_HKEY_EV_BAYEJ_ACK:
4042 hotkey_autosleep_ack = 1;
4043 pr_info("bay ejected\n");
4044 hotkey_wakeup_hotunplug_complete_notify_change();
4045 known_ev = true;
4046 break;
4047 case TP_HKEY_EV_OPTDRV_EJ:
4048 /* FIXME: kick libata if SATA link offline */
4049 known_ev = true;
4050 break;
4051 default:
4052 known_ev = false;
4053 }
4054 break;
4055 case 4:
4056 /* 0x4000-0x4FFF: dock-related events */
4057 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
4058 &ignore_acpi_ev);
4059 break;
4060 case 5:
4061 /* 0x5000-0x5FFF: human interface helpers */
4062 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
4063 &ignore_acpi_ev);
4064 break;
4065 case 6:
4066 /* 0x6000-0x6FFF: thermal alarms/notices and
4067 * keyboard events */
4068 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
4069 &ignore_acpi_ev);
4070 break;
4071 case 7:
4072 /* 0x7000-0x7FFF: misc */
4073 if (tp_features.hotkey_wlsw &&
4074 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
4075 tpacpi_send_radiosw_update();
4076 send_acpi_ev = 0;
4077 known_ev = true;
4078 break;
4079 }
4080 fallthrough; /* to default */
4081 default:
4082 known_ev = false;
4083 }
4084 if (!known_ev) {
4085 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
4086 pr_notice("please report the conditions when this event happened to %s\n",
4087 TPACPI_MAIL);
4088 }
4089
4090 /* netlink events */
4091 if (!ignore_acpi_ev && send_acpi_ev) {
4092 acpi_bus_generate_netlink_event(
4093 ibm->acpi->device->pnp.device_class,
4094 dev_name(&ibm->acpi->device->dev),
4095 event, hkey);
4096 }
4097 }
4098 }
4099
hotkey_suspend(void)4100 static void hotkey_suspend(void)
4101 {
4102 /* Do these on suspend, we get the events on early resume! */
4103 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
4104 hotkey_autosleep_ack = 0;
4105
4106 /* save previous mode of adaptive keyboard of X1 Carbon */
4107 if (tp_features.has_adaptive_kbd) {
4108 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
4109 "GTRW", "dd", 0)) {
4110 pr_err("Cannot read adaptive keyboard mode.\n");
4111 }
4112 }
4113 }
4114
hotkey_resume(void)4115 static void hotkey_resume(void)
4116 {
4117 tpacpi_disable_brightness_delay();
4118
4119 mutex_lock(&hotkey_mutex);
4120 if (hotkey_status_set(true) < 0 ||
4121 hotkey_mask_set(hotkey_acpi_mask) < 0)
4122 pr_err("error while attempting to reset the event firmware interface\n");
4123 mutex_unlock(&hotkey_mutex);
4124
4125 tpacpi_send_radiosw_update();
4126 tpacpi_input_send_tabletsw();
4127 hotkey_tablet_mode_notify_change();
4128 hotkey_wakeup_reason_notify_change();
4129 hotkey_wakeup_hotunplug_complete_notify_change();
4130 hotkey_poll_setup_safe(false);
4131
4132 /* restore previous mode of adapive keyboard of X1 Carbon */
4133 if (tp_features.has_adaptive_kbd) {
4134 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4135 adaptive_keyboard_prev_mode)) {
4136 pr_err("Cannot set adaptive keyboard mode.\n");
4137 }
4138 }
4139 }
4140
4141 /* procfs -------------------------------------------------------------- */
hotkey_read(struct seq_file * m)4142 static int hotkey_read(struct seq_file *m)
4143 {
4144 int res, status;
4145
4146 if (!tp_features.hotkey) {
4147 seq_printf(m, "status:\t\tnot supported\n");
4148 return 0;
4149 }
4150
4151 if (mutex_lock_killable(&hotkey_mutex))
4152 return -ERESTARTSYS;
4153 res = hotkey_status_get(&status);
4154 if (!res)
4155 res = hotkey_mask_get();
4156 mutex_unlock(&hotkey_mutex);
4157 if (res)
4158 return res;
4159
4160 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status & BIT(0)));
4161 if (hotkey_all_mask) {
4162 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4163 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4164 } else {
4165 seq_printf(m, "mask:\t\tnot supported\n");
4166 seq_printf(m, "commands:\tenable, disable, reset\n");
4167 }
4168
4169 return 0;
4170 }
4171
hotkey_enabledisable_warn(bool enable)4172 static void hotkey_enabledisable_warn(bool enable)
4173 {
4174 tpacpi_log_usertask("procfs hotkey enable/disable");
4175 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4176 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n")))
4177 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n");
4178 }
4179
hotkey_write(char * buf)4180 static int hotkey_write(char *buf)
4181 {
4182 int res;
4183 u32 mask;
4184 char *cmd;
4185
4186 if (!tp_features.hotkey)
4187 return -ENODEV;
4188
4189 if (mutex_lock_killable(&hotkey_mutex))
4190 return -ERESTARTSYS;
4191
4192 mask = hotkey_user_mask;
4193
4194 res = 0;
4195 while ((cmd = strsep(&buf, ","))) {
4196 if (strstarts(cmd, "enable")) {
4197 hotkey_enabledisable_warn(1);
4198 } else if (strstarts(cmd, "disable")) {
4199 hotkey_enabledisable_warn(0);
4200 res = -EPERM;
4201 } else if (strstarts(cmd, "reset")) {
4202 mask = (hotkey_all_mask | hotkey_source_mask)
4203 & ~hotkey_reserved_mask;
4204 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
4205 /* mask set */
4206 } else if (sscanf(cmd, "%x", &mask) == 1) {
4207 /* mask set */
4208 } else {
4209 res = -EINVAL;
4210 goto errexit;
4211 }
4212 }
4213
4214 if (!res) {
4215 tpacpi_disclose_usertask("procfs hotkey",
4216 "set mask to 0x%08x\n", mask);
4217 res = hotkey_user_mask_set(mask);
4218 }
4219
4220 errexit:
4221 mutex_unlock(&hotkey_mutex);
4222 return res;
4223 }
4224
4225 static const struct acpi_device_id ibm_htk_device_ids[] = {
4226 {TPACPI_ACPI_IBM_HKEY_HID, 0},
4227 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4228 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
4229 {"", 0},
4230 };
4231
4232 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4233 .hid = ibm_htk_device_ids,
4234 .notify = hotkey_notify,
4235 .handle = &hkey_handle,
4236 .type = ACPI_DEVICE_NOTIFY,
4237 };
4238
4239 static struct ibm_struct hotkey_driver_data = {
4240 .name = "hotkey",
4241 .read = hotkey_read,
4242 .write = hotkey_write,
4243 .exit = hotkey_exit,
4244 .resume = hotkey_resume,
4245 .suspend = hotkey_suspend,
4246 .acpi = &ibm_hotkey_acpidriver,
4247 };
4248
4249 /*************************************************************************
4250 * Bluetooth subdriver
4251 */
4252
4253 enum {
4254 /* ACPI GBDC/SBDC bits */
4255 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
4256 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
4257 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
4258 0 = disable, 1 = enable */
4259 };
4260
4261 enum {
4262 /* ACPI \BLTH commands */
4263 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
4264 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
4265 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
4266 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
4267 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
4268 };
4269
4270 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
4271
bluetooth_get_status(void)4272 static int bluetooth_get_status(void)
4273 {
4274 int status;
4275
4276 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4277 if (dbg_bluetoothemul)
4278 return (tpacpi_bluetooth_emulstate) ?
4279 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4280 #endif
4281
4282 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4283 return -EIO;
4284
4285 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4286 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4287 }
4288
bluetooth_set_status(enum tpacpi_rfkill_state state)4289 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4290 {
4291 int status;
4292
4293 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s bluetooth\n",
4294 str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4295
4296 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4297 if (dbg_bluetoothemul) {
4298 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4299 return 0;
4300 }
4301 #endif
4302
4303 if (state == TPACPI_RFK_RADIO_ON)
4304 status = TP_ACPI_BLUETOOTH_RADIOSSW
4305 | TP_ACPI_BLUETOOTH_RESUMECTRL;
4306 else
4307 status = 0;
4308
4309 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4310 return -EIO;
4311
4312 return 0;
4313 }
4314
4315 /* sysfs bluetooth enable ---------------------------------------------- */
bluetooth_enable_show(struct device * dev,struct device_attribute * attr,char * buf)4316 static ssize_t bluetooth_enable_show(struct device *dev,
4317 struct device_attribute *attr,
4318 char *buf)
4319 {
4320 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4321 attr, buf);
4322 }
4323
bluetooth_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)4324 static ssize_t bluetooth_enable_store(struct device *dev,
4325 struct device_attribute *attr,
4326 const char *buf, size_t count)
4327 {
4328 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4329 attr, buf, count);
4330 }
4331
4332 static DEVICE_ATTR_RW(bluetooth_enable);
4333
4334 /* --------------------------------------------------------------------- */
4335
4336 static struct attribute *bluetooth_attributes[] = {
4337 &dev_attr_bluetooth_enable.attr,
4338 NULL
4339 };
4340
bluetooth_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)4341 static umode_t bluetooth_attr_is_visible(struct kobject *kobj,
4342 struct attribute *attr, int n)
4343 {
4344 return tp_features.bluetooth ? attr->mode : 0;
4345 }
4346
4347 static const struct attribute_group bluetooth_attr_group = {
4348 .is_visible = bluetooth_attr_is_visible,
4349 .attrs = bluetooth_attributes,
4350 };
4351
4352 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4353 .get_status = bluetooth_get_status,
4354 .set_status = bluetooth_set_status,
4355 };
4356
bluetooth_shutdown(void)4357 static void bluetooth_shutdown(void)
4358 {
4359 /* Order firmware to save current state to NVRAM */
4360 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4361 TP_ACPI_BLTH_SAVE_STATE))
4362 pr_notice("failed to save bluetooth state to NVRAM\n");
4363 else
4364 vdbg_printk(TPACPI_DBG_RFKILL,
4365 "bluetooth state saved to NVRAM\n");
4366 }
4367
bluetooth_exit(void)4368 static void bluetooth_exit(void)
4369 {
4370 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4371 bluetooth_shutdown();
4372 }
4373
4374 static const struct dmi_system_id fwbug_list[] __initconst = {
4375 {
4376 .ident = "ThinkPad E485",
4377 .driver_data = &quirk_btusb_bug,
4378 .matches = {
4379 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4380 DMI_MATCH(DMI_BOARD_NAME, "20KU"),
4381 },
4382 },
4383 {
4384 .ident = "ThinkPad E585",
4385 .driver_data = &quirk_btusb_bug,
4386 .matches = {
4387 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4388 DMI_MATCH(DMI_BOARD_NAME, "20KV"),
4389 },
4390 },
4391 {
4392 .ident = "ThinkPad A285 - 20MW",
4393 .driver_data = &quirk_btusb_bug,
4394 .matches = {
4395 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4396 DMI_MATCH(DMI_BOARD_NAME, "20MW"),
4397 },
4398 },
4399 {
4400 .ident = "ThinkPad A285 - 20MX",
4401 .driver_data = &quirk_btusb_bug,
4402 .matches = {
4403 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4404 DMI_MATCH(DMI_BOARD_NAME, "20MX"),
4405 },
4406 },
4407 {
4408 .ident = "ThinkPad A485 - 20MU",
4409 .driver_data = &quirk_btusb_bug,
4410 .matches = {
4411 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4412 DMI_MATCH(DMI_BOARD_NAME, "20MU"),
4413 },
4414 },
4415 {
4416 .ident = "ThinkPad A485 - 20MV",
4417 .driver_data = &quirk_btusb_bug,
4418 .matches = {
4419 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4420 DMI_MATCH(DMI_BOARD_NAME, "20MV"),
4421 },
4422 },
4423 {}
4424 };
4425
4426 static const struct pci_device_id fwbug_cards_ids[] __initconst = {
4427 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) },
4428 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) },
4429 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) },
4430 {}
4431 };
4432
4433
have_bt_fwbug(void)4434 static int __init have_bt_fwbug(void)
4435 {
4436 /*
4437 * Some AMD based ThinkPads have a firmware bug that calling
4438 * "GBDC" will cause bluetooth on Intel wireless cards blocked
4439 */
4440 if (tp_features.quirks && tp_features.quirks->btusb_bug &&
4441 pci_dev_present(fwbug_cards_ids)) {
4442 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4443 FW_BUG "disable bluetooth subdriver for Intel cards\n");
4444 return 1;
4445 } else
4446 return 0;
4447 }
4448
bluetooth_init(struct ibm_init_struct * iibm)4449 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4450 {
4451 int res;
4452 int status = 0;
4453
4454 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4455 "initializing bluetooth subdriver\n");
4456
4457 TPACPI_ACPIHANDLE_INIT(hkey);
4458
4459 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4460 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4461 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle &&
4462 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4463
4464 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4465 "bluetooth is %s, status 0x%02x\n",
4466 str_supported(tp_features.bluetooth),
4467 status);
4468
4469 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4470 if (dbg_bluetoothemul) {
4471 tp_features.bluetooth = 1;
4472 pr_info("bluetooth switch emulation enabled\n");
4473 } else
4474 #endif
4475 if (tp_features.bluetooth &&
4476 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4477 /* no bluetooth hardware present in system */
4478 tp_features.bluetooth = 0;
4479 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4480 "bluetooth hardware not installed\n");
4481 }
4482
4483 if (!tp_features.bluetooth)
4484 return -ENODEV;
4485
4486 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4487 &bluetooth_tprfk_ops,
4488 RFKILL_TYPE_BLUETOOTH,
4489 TPACPI_RFK_BLUETOOTH_SW_NAME,
4490 true);
4491 return res;
4492 }
4493
4494 /* procfs -------------------------------------------------------------- */
bluetooth_read(struct seq_file * m)4495 static int bluetooth_read(struct seq_file *m)
4496 {
4497 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4498 }
4499
bluetooth_write(char * buf)4500 static int bluetooth_write(char *buf)
4501 {
4502 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4503 }
4504
4505 static struct ibm_struct bluetooth_driver_data = {
4506 .name = "bluetooth",
4507 .read = bluetooth_read,
4508 .write = bluetooth_write,
4509 .exit = bluetooth_exit,
4510 .shutdown = bluetooth_shutdown,
4511 };
4512
4513 /*************************************************************************
4514 * Wan subdriver
4515 */
4516
4517 enum {
4518 /* ACPI GWAN/SWAN bits */
4519 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4520 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4521 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4522 0 = disable, 1 = enable */
4523 };
4524
4525 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4526
wan_get_status(void)4527 static int wan_get_status(void)
4528 {
4529 int status;
4530
4531 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4532 if (dbg_wwanemul)
4533 return (tpacpi_wwan_emulstate) ?
4534 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4535 #endif
4536
4537 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4538 return -EIO;
4539
4540 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4541 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4542 }
4543
wan_set_status(enum tpacpi_rfkill_state state)4544 static int wan_set_status(enum tpacpi_rfkill_state state)
4545 {
4546 int status;
4547
4548 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s wwan\n",
4549 str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4550
4551 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4552 if (dbg_wwanemul) {
4553 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4554 return 0;
4555 }
4556 #endif
4557
4558 if (state == TPACPI_RFK_RADIO_ON)
4559 status = TP_ACPI_WANCARD_RADIOSSW
4560 | TP_ACPI_WANCARD_RESUMECTRL;
4561 else
4562 status = 0;
4563
4564 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4565 return -EIO;
4566
4567 return 0;
4568 }
4569
4570 /* sysfs wan enable ---------------------------------------------------- */
wan_enable_show(struct device * dev,struct device_attribute * attr,char * buf)4571 static ssize_t wan_enable_show(struct device *dev,
4572 struct device_attribute *attr,
4573 char *buf)
4574 {
4575 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4576 attr, buf);
4577 }
4578
wan_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)4579 static ssize_t wan_enable_store(struct device *dev,
4580 struct device_attribute *attr,
4581 const char *buf, size_t count)
4582 {
4583 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4584 attr, buf, count);
4585 }
4586
4587 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4588 wan_enable_show, wan_enable_store);
4589
4590 /* --------------------------------------------------------------------- */
4591
4592 static struct attribute *wan_attributes[] = {
4593 &dev_attr_wwan_enable.attr,
4594 NULL
4595 };
4596
wan_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)4597 static umode_t wan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
4598 int n)
4599 {
4600 return tp_features.wan ? attr->mode : 0;
4601 }
4602
4603 static const struct attribute_group wan_attr_group = {
4604 .is_visible = wan_attr_is_visible,
4605 .attrs = wan_attributes,
4606 };
4607
4608 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4609 .get_status = wan_get_status,
4610 .set_status = wan_set_status,
4611 };
4612
wan_shutdown(void)4613 static void wan_shutdown(void)
4614 {
4615 /* Order firmware to save current state to NVRAM */
4616 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4617 TP_ACPI_WGSV_SAVE_STATE))
4618 pr_notice("failed to save WWAN state to NVRAM\n");
4619 else
4620 vdbg_printk(TPACPI_DBG_RFKILL,
4621 "WWAN state saved to NVRAM\n");
4622 }
4623
wan_exit(void)4624 static void wan_exit(void)
4625 {
4626 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4627 wan_shutdown();
4628 }
4629
wan_init(struct ibm_init_struct * iibm)4630 static int __init wan_init(struct ibm_init_struct *iibm)
4631 {
4632 int res;
4633 int status = 0;
4634
4635 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4636 "initializing wan subdriver\n");
4637
4638 TPACPI_ACPIHANDLE_INIT(hkey);
4639
4640 tp_features.wan = hkey_handle &&
4641 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4642
4643 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4644 "wan is %s, status 0x%02x\n",
4645 str_supported(tp_features.wan),
4646 status);
4647
4648 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4649 if (dbg_wwanemul) {
4650 tp_features.wan = 1;
4651 pr_info("wwan switch emulation enabled\n");
4652 } else
4653 #endif
4654 if (tp_features.wan &&
4655 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4656 /* no wan hardware present in system */
4657 tp_features.wan = 0;
4658 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4659 "wan hardware not installed\n");
4660 }
4661
4662 if (!tp_features.wan)
4663 return -ENODEV;
4664
4665 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4666 &wan_tprfk_ops,
4667 RFKILL_TYPE_WWAN,
4668 TPACPI_RFK_WWAN_SW_NAME,
4669 true);
4670 return res;
4671 }
4672
4673 /* procfs -------------------------------------------------------------- */
wan_read(struct seq_file * m)4674 static int wan_read(struct seq_file *m)
4675 {
4676 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4677 }
4678
wan_write(char * buf)4679 static int wan_write(char *buf)
4680 {
4681 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4682 }
4683
4684 static struct ibm_struct wan_driver_data = {
4685 .name = "wan",
4686 .read = wan_read,
4687 .write = wan_write,
4688 .exit = wan_exit,
4689 .shutdown = wan_shutdown,
4690 };
4691
4692 /*************************************************************************
4693 * UWB subdriver
4694 */
4695
4696 enum {
4697 /* ACPI GUWB/SUWB bits */
4698 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4699 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4700 };
4701
4702 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4703
uwb_get_status(void)4704 static int uwb_get_status(void)
4705 {
4706 int status;
4707
4708 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4709 if (dbg_uwbemul)
4710 return (tpacpi_uwb_emulstate) ?
4711 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4712 #endif
4713
4714 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4715 return -EIO;
4716
4717 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4718 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4719 }
4720
uwb_set_status(enum tpacpi_rfkill_state state)4721 static int uwb_set_status(enum tpacpi_rfkill_state state)
4722 {
4723 int status;
4724
4725 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s UWB\n",
4726 str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4727
4728 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4729 if (dbg_uwbemul) {
4730 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4731 return 0;
4732 }
4733 #endif
4734
4735 if (state == TPACPI_RFK_RADIO_ON)
4736 status = TP_ACPI_UWB_RADIOSSW;
4737 else
4738 status = 0;
4739
4740 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4741 return -EIO;
4742
4743 return 0;
4744 }
4745
4746 /* --------------------------------------------------------------------- */
4747
4748 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4749 .get_status = uwb_get_status,
4750 .set_status = uwb_set_status,
4751 };
4752
uwb_exit(void)4753 static void uwb_exit(void)
4754 {
4755 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4756 }
4757
uwb_init(struct ibm_init_struct * iibm)4758 static int __init uwb_init(struct ibm_init_struct *iibm)
4759 {
4760 int res;
4761 int status = 0;
4762
4763 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4764 "initializing uwb subdriver\n");
4765
4766 TPACPI_ACPIHANDLE_INIT(hkey);
4767
4768 tp_features.uwb = hkey_handle &&
4769 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4770
4771 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4772 "uwb is %s, status 0x%02x\n",
4773 str_supported(tp_features.uwb),
4774 status);
4775
4776 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4777 if (dbg_uwbemul) {
4778 tp_features.uwb = 1;
4779 pr_info("uwb switch emulation enabled\n");
4780 } else
4781 #endif
4782 if (tp_features.uwb &&
4783 !(status & TP_ACPI_UWB_HWPRESENT)) {
4784 /* no uwb hardware present in system */
4785 tp_features.uwb = 0;
4786 dbg_printk(TPACPI_DBG_INIT,
4787 "uwb hardware not installed\n");
4788 }
4789
4790 if (!tp_features.uwb)
4791 return -ENODEV;
4792
4793 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4794 &uwb_tprfk_ops,
4795 RFKILL_TYPE_UWB,
4796 TPACPI_RFK_UWB_SW_NAME,
4797 false);
4798 return res;
4799 }
4800
4801 static struct ibm_struct uwb_driver_data = {
4802 .name = "uwb",
4803 .exit = uwb_exit,
4804 .flags.experimental = 1,
4805 };
4806
4807 /*************************************************************************
4808 * Video subdriver
4809 */
4810
4811 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4812
4813 enum video_access_mode {
4814 TPACPI_VIDEO_NONE = 0,
4815 TPACPI_VIDEO_570, /* 570 */
4816 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4817 TPACPI_VIDEO_NEW, /* all others */
4818 };
4819
4820 enum { /* video status flags, based on VIDEO_570 */
4821 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4822 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4823 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4824 };
4825
4826 enum { /* TPACPI_VIDEO_570 constants */
4827 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4828 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4829 * video_status_flags */
4830 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4831 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4832 };
4833
4834 static enum video_access_mode video_supported;
4835 static int video_orig_autosw;
4836
4837 static int video_autosw_get(void);
4838 static int video_autosw_set(int enable);
4839
4840 TPACPI_HANDLE(vid, root,
4841 "\\_SB.PCI.AGP.VGA", /* 570 */
4842 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4843 "\\_SB.PCI0.VID0", /* 770e */
4844 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4845 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4846 "\\_SB.PCI0.AGP.VID", /* all others */
4847 ); /* R30, R31 */
4848
4849 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4850
video_init(struct ibm_init_struct * iibm)4851 static int __init video_init(struct ibm_init_struct *iibm)
4852 {
4853 int ivga;
4854
4855 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4856
4857 TPACPI_ACPIHANDLE_INIT(vid);
4858 if (tpacpi_is_ibm())
4859 TPACPI_ACPIHANDLE_INIT(vid2);
4860
4861 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4862 /* G41, assume IVGA doesn't change */
4863 vid_handle = vid2_handle;
4864
4865 if (!vid_handle)
4866 /* video switching not supported on R30, R31 */
4867 video_supported = TPACPI_VIDEO_NONE;
4868 else if (tpacpi_is_ibm() &&
4869 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4870 /* 570 */
4871 video_supported = TPACPI_VIDEO_570;
4872 else if (tpacpi_is_ibm() &&
4873 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4874 /* 600e/x, 770e, 770x */
4875 video_supported = TPACPI_VIDEO_770;
4876 else
4877 /* all others */
4878 video_supported = TPACPI_VIDEO_NEW;
4879
4880 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4881 str_supported(video_supported != TPACPI_VIDEO_NONE),
4882 video_supported);
4883
4884 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : -ENODEV;
4885 }
4886
video_exit(void)4887 static void video_exit(void)
4888 {
4889 dbg_printk(TPACPI_DBG_EXIT,
4890 "restoring original video autoswitch mode\n");
4891 if (video_autosw_set(video_orig_autosw))
4892 pr_err("error while trying to restore original video autoswitch mode\n");
4893 }
4894
video_outputsw_get(void)4895 static int video_outputsw_get(void)
4896 {
4897 int status = 0;
4898 int i;
4899
4900 switch (video_supported) {
4901 case TPACPI_VIDEO_570:
4902 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4903 TP_ACPI_VIDEO_570_PHSCMD))
4904 return -EIO;
4905 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4906 break;
4907 case TPACPI_VIDEO_770:
4908 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4909 return -EIO;
4910 if (i)
4911 status |= TP_ACPI_VIDEO_S_LCD;
4912 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4913 return -EIO;
4914 if (i)
4915 status |= TP_ACPI_VIDEO_S_CRT;
4916 break;
4917 case TPACPI_VIDEO_NEW:
4918 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4919 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4920 return -EIO;
4921 if (i)
4922 status |= TP_ACPI_VIDEO_S_CRT;
4923
4924 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4925 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4926 return -EIO;
4927 if (i)
4928 status |= TP_ACPI_VIDEO_S_LCD;
4929 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4930 return -EIO;
4931 if (i)
4932 status |= TP_ACPI_VIDEO_S_DVI;
4933 break;
4934 default:
4935 return -ENOSYS;
4936 }
4937
4938 return status;
4939 }
4940
video_outputsw_set(int status)4941 static int video_outputsw_set(int status)
4942 {
4943 int autosw;
4944 int res = 0;
4945
4946 switch (video_supported) {
4947 case TPACPI_VIDEO_570:
4948 res = acpi_evalf(NULL, NULL,
4949 "\\_SB.PHS2", "vdd",
4950 TP_ACPI_VIDEO_570_PHS2CMD,
4951 status | TP_ACPI_VIDEO_570_PHS2SET);
4952 break;
4953 case TPACPI_VIDEO_770:
4954 autosw = video_autosw_get();
4955 if (autosw < 0)
4956 return autosw;
4957
4958 res = video_autosw_set(1);
4959 if (res)
4960 return res;
4961 res = acpi_evalf(vid_handle, NULL,
4962 "ASWT", "vdd", status * 0x100, 0);
4963 if (!autosw && video_autosw_set(autosw)) {
4964 pr_err("video auto-switch left enabled due to error\n");
4965 return -EIO;
4966 }
4967 break;
4968 case TPACPI_VIDEO_NEW:
4969 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4970 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4971 break;
4972 default:
4973 return -ENOSYS;
4974 }
4975
4976 return (res) ? 0 : -EIO;
4977 }
4978
video_autosw_get(void)4979 static int video_autosw_get(void)
4980 {
4981 int autosw = 0;
4982
4983 switch (video_supported) {
4984 case TPACPI_VIDEO_570:
4985 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4986 return -EIO;
4987 break;
4988 case TPACPI_VIDEO_770:
4989 case TPACPI_VIDEO_NEW:
4990 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4991 return -EIO;
4992 break;
4993 default:
4994 return -ENOSYS;
4995 }
4996
4997 return autosw & 1;
4998 }
4999
video_autosw_set(int enable)5000 static int video_autosw_set(int enable)
5001 {
5002 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
5003 return -EIO;
5004 return 0;
5005 }
5006
video_outputsw_cycle(void)5007 static int video_outputsw_cycle(void)
5008 {
5009 int autosw = video_autosw_get();
5010 int res;
5011
5012 if (autosw < 0)
5013 return autosw;
5014
5015 switch (video_supported) {
5016 case TPACPI_VIDEO_570:
5017 res = video_autosw_set(1);
5018 if (res)
5019 return res;
5020 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
5021 break;
5022 case TPACPI_VIDEO_770:
5023 case TPACPI_VIDEO_NEW:
5024 res = video_autosw_set(1);
5025 if (res)
5026 return res;
5027 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
5028 break;
5029 default:
5030 return -ENOSYS;
5031 }
5032 if (!autosw && video_autosw_set(autosw)) {
5033 pr_err("video auto-switch left enabled due to error\n");
5034 return -EIO;
5035 }
5036
5037 return (res) ? 0 : -EIO;
5038 }
5039
video_expand_toggle(void)5040 static int video_expand_toggle(void)
5041 {
5042 switch (video_supported) {
5043 case TPACPI_VIDEO_570:
5044 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
5045 0 : -EIO;
5046 case TPACPI_VIDEO_770:
5047 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
5048 0 : -EIO;
5049 case TPACPI_VIDEO_NEW:
5050 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
5051 0 : -EIO;
5052 default:
5053 return -ENOSYS;
5054 }
5055 /* not reached */
5056 }
5057
video_read(struct seq_file * m)5058 static int video_read(struct seq_file *m)
5059 {
5060 int status, autosw;
5061
5062 if (video_supported == TPACPI_VIDEO_NONE) {
5063 seq_printf(m, "status:\t\tnot supported\n");
5064 return 0;
5065 }
5066
5067 /* Even reads can crash X.org, so... */
5068 if (!capable(CAP_SYS_ADMIN))
5069 return -EPERM;
5070
5071 status = video_outputsw_get();
5072 if (status < 0)
5073 return status;
5074
5075 autosw = video_autosw_get();
5076 if (autosw < 0)
5077 return autosw;
5078
5079 seq_printf(m, "status:\t\tsupported\n");
5080 seq_printf(m, "lcd:\t\t%s\n", str_enabled_disabled(status & BIT(0)));
5081 seq_printf(m, "crt:\t\t%s\n", str_enabled_disabled(status & BIT(1)));
5082 if (video_supported == TPACPI_VIDEO_NEW)
5083 seq_printf(m, "dvi:\t\t%s\n", str_enabled_disabled(status & BIT(3)));
5084 seq_printf(m, "auto:\t\t%s\n", str_enabled_disabled(autosw & BIT(0)));
5085 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
5086 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
5087 if (video_supported == TPACPI_VIDEO_NEW)
5088 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
5089 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
5090 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
5091
5092 return 0;
5093 }
5094
video_write(char * buf)5095 static int video_write(char *buf)
5096 {
5097 char *cmd;
5098 int enable, disable, status;
5099 int res;
5100
5101 if (video_supported == TPACPI_VIDEO_NONE)
5102 return -ENODEV;
5103
5104 /* Even reads can crash X.org, let alone writes... */
5105 if (!capable(CAP_SYS_ADMIN))
5106 return -EPERM;
5107
5108 enable = 0;
5109 disable = 0;
5110
5111 while ((cmd = strsep(&buf, ","))) {
5112 if (strstarts(cmd, "lcd_enable")) {
5113 enable |= TP_ACPI_VIDEO_S_LCD;
5114 } else if (strstarts(cmd, "lcd_disable")) {
5115 disable |= TP_ACPI_VIDEO_S_LCD;
5116 } else if (strstarts(cmd, "crt_enable")) {
5117 enable |= TP_ACPI_VIDEO_S_CRT;
5118 } else if (strstarts(cmd, "crt_disable")) {
5119 disable |= TP_ACPI_VIDEO_S_CRT;
5120 } else if (video_supported == TPACPI_VIDEO_NEW &&
5121 strstarts(cmd, "dvi_enable")) {
5122 enable |= TP_ACPI_VIDEO_S_DVI;
5123 } else if (video_supported == TPACPI_VIDEO_NEW &&
5124 strstarts(cmd, "dvi_disable")) {
5125 disable |= TP_ACPI_VIDEO_S_DVI;
5126 } else if (strstarts(cmd, "auto_enable")) {
5127 res = video_autosw_set(1);
5128 if (res)
5129 return res;
5130 } else if (strstarts(cmd, "auto_disable")) {
5131 res = video_autosw_set(0);
5132 if (res)
5133 return res;
5134 } else if (strstarts(cmd, "video_switch")) {
5135 res = video_outputsw_cycle();
5136 if (res)
5137 return res;
5138 } else if (strstarts(cmd, "expand_toggle")) {
5139 res = video_expand_toggle();
5140 if (res)
5141 return res;
5142 } else
5143 return -EINVAL;
5144 }
5145
5146 if (enable || disable) {
5147 status = video_outputsw_get();
5148 if (status < 0)
5149 return status;
5150 res = video_outputsw_set((status & ~disable) | enable);
5151 if (res)
5152 return res;
5153 }
5154
5155 return 0;
5156 }
5157
5158 static struct ibm_struct video_driver_data = {
5159 .name = "video",
5160 .read = video_read,
5161 .write = video_write,
5162 .exit = video_exit,
5163 };
5164
5165 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
5166
5167 /*************************************************************************
5168 * Keyboard backlight subdriver
5169 */
5170
5171 static enum led_brightness kbdlight_brightness;
5172 static DEFINE_MUTEX(kbdlight_mutex);
5173
kbdlight_set_level(int level)5174 static int kbdlight_set_level(int level)
5175 {
5176 int ret = 0;
5177
5178 if (!hkey_handle)
5179 return -ENXIO;
5180
5181 mutex_lock(&kbdlight_mutex);
5182
5183 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
5184 ret = -EIO;
5185 else
5186 kbdlight_brightness = level;
5187
5188 mutex_unlock(&kbdlight_mutex);
5189
5190 return ret;
5191 }
5192
kbdlight_get_level(void)5193 static int kbdlight_get_level(void)
5194 {
5195 int status = 0;
5196
5197 if (!hkey_handle)
5198 return -ENXIO;
5199
5200 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
5201 return -EIO;
5202
5203 if (status < 0)
5204 return status;
5205
5206 return status & 0x3;
5207 }
5208
kbdlight_is_supported(void)5209 static bool kbdlight_is_supported(void)
5210 {
5211 int status = 0;
5212
5213 if (!hkey_handle)
5214 return false;
5215
5216 if (!acpi_has_method(hkey_handle, "MLCG")) {
5217 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
5218 return false;
5219 }
5220
5221 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
5222 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
5223 return false;
5224 }
5225
5226 if (status < 0) {
5227 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
5228 return false;
5229 }
5230
5231 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
5232 /*
5233 * Guessed test for keyboard backlight:
5234 *
5235 * Machines with backlight keyboard return:
5236 * b010100000010000000XX - ThinkPad X1 Carbon 3rd
5237 * b110100010010000000XX - ThinkPad x230
5238 * b010100000010000000XX - ThinkPad x240
5239 * b010100000010000000XX - ThinkPad W541
5240 * (XX is current backlight level)
5241 *
5242 * Machines without backlight keyboard return:
5243 * b10100001000000000000 - ThinkPad x230
5244 * b10110001000000000000 - ThinkPad E430
5245 * b00000000000000000000 - ThinkPad E450
5246 *
5247 * Candidate BITs for detection test (XOR):
5248 * b01000000001000000000
5249 * ^
5250 */
5251 return status & BIT(9);
5252 }
5253
kbdlight_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)5254 static int kbdlight_sysfs_set(struct led_classdev *led_cdev,
5255 enum led_brightness brightness)
5256 {
5257 return kbdlight_set_level(brightness);
5258 }
5259
kbdlight_sysfs_get(struct led_classdev * led_cdev)5260 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
5261 {
5262 int level;
5263
5264 level = kbdlight_get_level();
5265 if (level < 0)
5266 return 0;
5267
5268 return level;
5269 }
5270
5271 static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
5272 .led_classdev = {
5273 .name = "tpacpi::kbd_backlight",
5274 .max_brightness = 2,
5275 .flags = LED_BRIGHT_HW_CHANGED,
5276 .brightness_set_blocking = &kbdlight_sysfs_set,
5277 .brightness_get = &kbdlight_sysfs_get,
5278 }
5279 };
5280
kbdlight_init(struct ibm_init_struct * iibm)5281 static int __init kbdlight_init(struct ibm_init_struct *iibm)
5282 {
5283 int rc;
5284
5285 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
5286
5287 TPACPI_ACPIHANDLE_INIT(hkey);
5288
5289 if (!kbdlight_is_supported()) {
5290 tp_features.kbdlight = 0;
5291 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
5292 return -ENODEV;
5293 }
5294
5295 kbdlight_brightness = kbdlight_sysfs_get(NULL);
5296 tp_features.kbdlight = 1;
5297
5298 rc = led_classdev_register(&tpacpi_pdev->dev,
5299 &tpacpi_led_kbdlight.led_classdev);
5300 if (rc < 0) {
5301 tp_features.kbdlight = 0;
5302 return rc;
5303 }
5304
5305 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
5306 TP_ACPI_HKEY_KBD_LIGHT_MASK);
5307 return 0;
5308 }
5309
kbdlight_exit(void)5310 static void kbdlight_exit(void)
5311 {
5312 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
5313 }
5314
kbdlight_set_level_and_update(int level)5315 static int kbdlight_set_level_and_update(int level)
5316 {
5317 int ret;
5318 struct led_classdev *led_cdev;
5319
5320 ret = kbdlight_set_level(level);
5321 led_cdev = &tpacpi_led_kbdlight.led_classdev;
5322
5323 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED))
5324 led_cdev->brightness = level;
5325
5326 return ret;
5327 }
5328
kbdlight_read(struct seq_file * m)5329 static int kbdlight_read(struct seq_file *m)
5330 {
5331 int level;
5332
5333 if (!tp_features.kbdlight) {
5334 seq_printf(m, "status:\t\tnot supported\n");
5335 } else {
5336 level = kbdlight_get_level();
5337 if (level < 0)
5338 seq_printf(m, "status:\t\terror %d\n", level);
5339 else
5340 seq_printf(m, "status:\t\t%d\n", level);
5341 seq_printf(m, "commands:\t0, 1, 2\n");
5342 }
5343
5344 return 0;
5345 }
5346
kbdlight_write(char * buf)5347 static int kbdlight_write(char *buf)
5348 {
5349 char *cmd;
5350 int res, level = -EINVAL;
5351
5352 if (!tp_features.kbdlight)
5353 return -ENODEV;
5354
5355 while ((cmd = strsep(&buf, ","))) {
5356 res = kstrtoint(cmd, 10, &level);
5357 if (res < 0)
5358 return res;
5359 }
5360
5361 if (level >= 3 || level < 0)
5362 return -EINVAL;
5363
5364 return kbdlight_set_level_and_update(level);
5365 }
5366
kbdlight_suspend(void)5367 static void kbdlight_suspend(void)
5368 {
5369 struct led_classdev *led_cdev;
5370
5371 if (!tp_features.kbdlight)
5372 return;
5373
5374 led_cdev = &tpacpi_led_kbdlight.led_classdev;
5375 led_update_brightness(led_cdev);
5376 led_classdev_suspend(led_cdev);
5377 }
5378
kbdlight_resume(void)5379 static void kbdlight_resume(void)
5380 {
5381 if (!tp_features.kbdlight)
5382 return;
5383
5384 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev);
5385 }
5386
5387 static struct ibm_struct kbdlight_driver_data = {
5388 .name = "kbdlight",
5389 .read = kbdlight_read,
5390 .write = kbdlight_write,
5391 .suspend = kbdlight_suspend,
5392 .resume = kbdlight_resume,
5393 .exit = kbdlight_exit,
5394 };
5395
5396 /*************************************************************************
5397 * Light (thinklight) subdriver
5398 */
5399
5400 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
5401 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
5402
light_get_status(void)5403 static int light_get_status(void)
5404 {
5405 int status = 0;
5406
5407 if (tp_features.light_status) {
5408 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5409 return -EIO;
5410 return (!!status);
5411 }
5412
5413 return -ENXIO;
5414 }
5415
light_set_status(int status)5416 static int light_set_status(int status)
5417 {
5418 int rc;
5419
5420 if (tp_features.light) {
5421 if (cmos_handle) {
5422 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5423 (status) ?
5424 TP_CMOS_THINKLIGHT_ON :
5425 TP_CMOS_THINKLIGHT_OFF);
5426 } else {
5427 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5428 (status) ? 1 : 0);
5429 }
5430 return (rc) ? 0 : -EIO;
5431 }
5432
5433 return -ENXIO;
5434 }
5435
light_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)5436 static int light_sysfs_set(struct led_classdev *led_cdev,
5437 enum led_brightness brightness)
5438 {
5439 return light_set_status((brightness != LED_OFF) ?
5440 TPACPI_LED_ON : TPACPI_LED_OFF);
5441 }
5442
light_sysfs_get(struct led_classdev * led_cdev)5443 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5444 {
5445 return (light_get_status() == 1) ? LED_ON : LED_OFF;
5446 }
5447
5448 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5449 .led_classdev = {
5450 .name = "tpacpi::thinklight",
5451 .max_brightness = 1,
5452 .brightness_set_blocking = &light_sysfs_set,
5453 .brightness_get = &light_sysfs_get,
5454 }
5455 };
5456
light_init(struct ibm_init_struct * iibm)5457 static int __init light_init(struct ibm_init_struct *iibm)
5458 {
5459 int rc;
5460
5461 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5462
5463 if (tpacpi_is_ibm()) {
5464 TPACPI_ACPIHANDLE_INIT(ledb);
5465 TPACPI_ACPIHANDLE_INIT(lght);
5466 }
5467 TPACPI_ACPIHANDLE_INIT(cmos);
5468
5469 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5470 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5471
5472 if (tp_features.light)
5473 /* light status not supported on
5474 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5475 tp_features.light_status =
5476 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5477
5478 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5479 str_supported(tp_features.light),
5480 str_supported(tp_features.light_status));
5481
5482 if (!tp_features.light)
5483 return -ENODEV;
5484
5485 rc = led_classdev_register(&tpacpi_pdev->dev,
5486 &tpacpi_led_thinklight.led_classdev);
5487
5488 if (rc < 0) {
5489 tp_features.light = 0;
5490 tp_features.light_status = 0;
5491 } else {
5492 rc = 0;
5493 }
5494
5495 return rc;
5496 }
5497
light_exit(void)5498 static void light_exit(void)
5499 {
5500 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5501 }
5502
light_read(struct seq_file * m)5503 static int light_read(struct seq_file *m)
5504 {
5505 int status;
5506
5507 if (!tp_features.light) {
5508 seq_printf(m, "status:\t\tnot supported\n");
5509 } else if (!tp_features.light_status) {
5510 seq_printf(m, "status:\t\tunknown\n");
5511 seq_printf(m, "commands:\ton, off\n");
5512 } else {
5513 status = light_get_status();
5514 if (status < 0)
5515 return status;
5516 seq_printf(m, "status:\t\t%s\n", str_on_off(status & BIT(0)));
5517 seq_printf(m, "commands:\ton, off\n");
5518 }
5519
5520 return 0;
5521 }
5522
light_write(char * buf)5523 static int light_write(char *buf)
5524 {
5525 char *cmd;
5526 int newstatus = 0;
5527
5528 if (!tp_features.light)
5529 return -ENODEV;
5530
5531 while ((cmd = strsep(&buf, ","))) {
5532 if (strstarts(cmd, "on")) {
5533 newstatus = 1;
5534 } else if (strstarts(cmd, "off")) {
5535 newstatus = 0;
5536 } else
5537 return -EINVAL;
5538 }
5539
5540 return light_set_status(newstatus);
5541 }
5542
5543 static struct ibm_struct light_driver_data = {
5544 .name = "light",
5545 .read = light_read,
5546 .write = light_write,
5547 .exit = light_exit,
5548 };
5549
5550 /*************************************************************************
5551 * CMOS subdriver
5552 */
5553
5554 /* sysfs cmos_command -------------------------------------------------- */
cmos_command_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)5555 static ssize_t cmos_command_store(struct device *dev,
5556 struct device_attribute *attr,
5557 const char *buf, size_t count)
5558 {
5559 unsigned long cmos_cmd;
5560 int res;
5561
5562 if (parse_strtoul(buf, 21, &cmos_cmd))
5563 return -EINVAL;
5564
5565 res = issue_thinkpad_cmos_command(cmos_cmd);
5566 return (res) ? res : count;
5567 }
5568
5569 static DEVICE_ATTR_WO(cmos_command);
5570
5571 static struct attribute *cmos_attributes[] = {
5572 &dev_attr_cmos_command.attr,
5573 NULL
5574 };
5575
cmos_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)5576 static umode_t cmos_attr_is_visible(struct kobject *kobj,
5577 struct attribute *attr, int n)
5578 {
5579 return cmos_handle ? attr->mode : 0;
5580 }
5581
5582 static const struct attribute_group cmos_attr_group = {
5583 .is_visible = cmos_attr_is_visible,
5584 .attrs = cmos_attributes,
5585 };
5586
5587 /* --------------------------------------------------------------------- */
5588
cmos_init(struct ibm_init_struct * iibm)5589 static int __init cmos_init(struct ibm_init_struct *iibm)
5590 {
5591 vdbg_printk(TPACPI_DBG_INIT,
5592 "initializing cmos commands subdriver\n");
5593
5594 TPACPI_ACPIHANDLE_INIT(cmos);
5595
5596 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5597 str_supported(cmos_handle != NULL));
5598
5599 return cmos_handle ? 0 : -ENODEV;
5600 }
5601
cmos_read(struct seq_file * m)5602 static int cmos_read(struct seq_file *m)
5603 {
5604 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5605 R30, R31, T20-22, X20-21 */
5606 if (!cmos_handle)
5607 seq_printf(m, "status:\t\tnot supported\n");
5608 else {
5609 seq_printf(m, "status:\t\tsupported\n");
5610 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5611 }
5612
5613 return 0;
5614 }
5615
cmos_write(char * buf)5616 static int cmos_write(char *buf)
5617 {
5618 char *cmd;
5619 int cmos_cmd, res;
5620
5621 while ((cmd = strsep(&buf, ","))) {
5622 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5623 cmos_cmd >= 0 && cmos_cmd <= 21) {
5624 /* cmos_cmd set */
5625 } else
5626 return -EINVAL;
5627
5628 res = issue_thinkpad_cmos_command(cmos_cmd);
5629 if (res)
5630 return res;
5631 }
5632
5633 return 0;
5634 }
5635
5636 static struct ibm_struct cmos_driver_data = {
5637 .name = "cmos",
5638 .read = cmos_read,
5639 .write = cmos_write,
5640 };
5641
5642 /*************************************************************************
5643 * LED subdriver
5644 */
5645
5646 enum led_access_mode {
5647 TPACPI_LED_NONE = 0,
5648 TPACPI_LED_570, /* 570 */
5649 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5650 TPACPI_LED_NEW, /* all others */
5651 };
5652
5653 enum { /* For TPACPI_LED_OLD */
5654 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5655 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5656 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5657 };
5658
5659 static enum led_access_mode led_supported;
5660
5661 static acpi_handle led_handle;
5662
5663 #define TPACPI_LED_NUMLEDS 16
5664 static struct tpacpi_led_classdev *tpacpi_leds;
5665 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5666 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5667 /* there's a limit of 19 chars + NULL before 2.6.26 */
5668 "tpacpi::power",
5669 "tpacpi:orange:batt",
5670 "tpacpi:green:batt",
5671 "tpacpi::dock_active",
5672 "tpacpi::bay_active",
5673 "tpacpi::dock_batt",
5674 "tpacpi::unknown_led",
5675 "tpacpi::standby",
5676 "tpacpi::dock_status1",
5677 "tpacpi::dock_status2",
5678 "tpacpi::lid_logo_dot",
5679 "tpacpi::unknown_led3",
5680 "tpacpi::thinkvantage",
5681 };
5682 #define TPACPI_SAFE_LEDS 0x1481U
5683
tpacpi_is_led_restricted(const unsigned int led)5684 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5685 {
5686 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5687 return false;
5688 #else
5689 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5690 #endif
5691 }
5692
led_get_status(const unsigned int led)5693 static int led_get_status(const unsigned int led)
5694 {
5695 int status;
5696 enum led_status_t led_s;
5697
5698 switch (led_supported) {
5699 case TPACPI_LED_570:
5700 if (!acpi_evalf(ec_handle,
5701 &status, "GLED", "dd", 1 << led))
5702 return -EIO;
5703 led_s = (status == 0) ?
5704 TPACPI_LED_OFF :
5705 ((status == 1) ?
5706 TPACPI_LED_ON :
5707 TPACPI_LED_BLINK);
5708 tpacpi_led_state_cache[led] = led_s;
5709 return led_s;
5710 default:
5711 return -ENXIO;
5712 }
5713
5714 /* not reached */
5715 }
5716
led_set_status(const unsigned int led,const enum led_status_t ledstatus)5717 static int led_set_status(const unsigned int led,
5718 const enum led_status_t ledstatus)
5719 {
5720 /* off, on, blink. Index is led_status_t */
5721 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5722 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5723
5724 int rc = 0;
5725
5726 switch (led_supported) {
5727 case TPACPI_LED_570:
5728 /* 570 */
5729 if (unlikely(led > 7))
5730 return -EINVAL;
5731 if (unlikely(tpacpi_is_led_restricted(led)))
5732 return -EPERM;
5733 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5734 (1 << led), led_sled_arg1[ledstatus]))
5735 return -EIO;
5736 break;
5737 case TPACPI_LED_OLD:
5738 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5739 if (unlikely(led > 7))
5740 return -EINVAL;
5741 if (unlikely(tpacpi_is_led_restricted(led)))
5742 return -EPERM;
5743 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5744 if (rc >= 0)
5745 rc = ec_write(TPACPI_LED_EC_HLBL,
5746 (ledstatus == TPACPI_LED_BLINK) << led);
5747 if (rc >= 0)
5748 rc = ec_write(TPACPI_LED_EC_HLCL,
5749 (ledstatus != TPACPI_LED_OFF) << led);
5750 break;
5751 case TPACPI_LED_NEW:
5752 /* all others */
5753 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5754 return -EINVAL;
5755 if (unlikely(tpacpi_is_led_restricted(led)))
5756 return -EPERM;
5757 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5758 led, led_led_arg1[ledstatus]))
5759 return -EIO;
5760 break;
5761 default:
5762 return -ENXIO;
5763 }
5764
5765 if (!rc)
5766 tpacpi_led_state_cache[led] = ledstatus;
5767
5768 return rc;
5769 }
5770
led_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)5771 static int led_sysfs_set(struct led_classdev *led_cdev,
5772 enum led_brightness brightness)
5773 {
5774 struct tpacpi_led_classdev *data = container_of(led_cdev,
5775 struct tpacpi_led_classdev, led_classdev);
5776 enum led_status_t new_state;
5777
5778 if (brightness == LED_OFF)
5779 new_state = TPACPI_LED_OFF;
5780 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5781 new_state = TPACPI_LED_ON;
5782 else
5783 new_state = TPACPI_LED_BLINK;
5784
5785 return led_set_status(data->led, new_state);
5786 }
5787
led_sysfs_blink_set(struct led_classdev * led_cdev,unsigned long * delay_on,unsigned long * delay_off)5788 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5789 unsigned long *delay_on, unsigned long *delay_off)
5790 {
5791 struct tpacpi_led_classdev *data = container_of(led_cdev,
5792 struct tpacpi_led_classdev, led_classdev);
5793
5794 /* Can we choose the flash rate? */
5795 if (*delay_on == 0 && *delay_off == 0) {
5796 /* yes. set them to the hardware blink rate (1 Hz) */
5797 *delay_on = 500; /* ms */
5798 *delay_off = 500; /* ms */
5799 } else if ((*delay_on != 500) || (*delay_off != 500))
5800 return -EINVAL;
5801
5802 return led_set_status(data->led, TPACPI_LED_BLINK);
5803 }
5804
led_sysfs_get(struct led_classdev * led_cdev)5805 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5806 {
5807 int rc;
5808
5809 struct tpacpi_led_classdev *data = container_of(led_cdev,
5810 struct tpacpi_led_classdev, led_classdev);
5811
5812 rc = led_get_status(data->led);
5813
5814 if (rc == TPACPI_LED_OFF || rc < 0)
5815 rc = LED_OFF; /* no error handling in led class :( */
5816 else
5817 rc = LED_FULL;
5818
5819 return rc;
5820 }
5821
led_exit(void)5822 static void led_exit(void)
5823 {
5824 unsigned int i;
5825
5826 for (i = 0; i < TPACPI_LED_NUMLEDS; i++)
5827 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5828
5829 kfree(tpacpi_leds);
5830 }
5831
tpacpi_init_led(unsigned int led)5832 static int __init tpacpi_init_led(unsigned int led)
5833 {
5834 /* LEDs with no name don't get registered */
5835 if (!tpacpi_led_names[led])
5836 return 0;
5837
5838 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set;
5839 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5840 if (led_supported == TPACPI_LED_570)
5841 tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get;
5842
5843 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5844 tpacpi_leds[led].led_classdev.flags = LED_RETAIN_AT_SHUTDOWN;
5845 tpacpi_leds[led].led = led;
5846
5847 return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev);
5848 }
5849
5850 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5851 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5852 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5853 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5854
5855 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5856 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5857 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5858 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5859 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5860 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5861 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5862 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5863
5864 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5865 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5866 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5867 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5868 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5869
5870 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5871 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5872 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5873 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5874
5875 /* (1) - may have excess leds enabled on MSB */
5876
5877 /* Defaults (order matters, keep last, don't reorder!) */
5878 { /* Lenovo */
5879 .vendor = PCI_VENDOR_ID_LENOVO,
5880 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5881 .quirks = 0x1fffU,
5882 },
5883 { /* IBM ThinkPads with no EC version string */
5884 .vendor = PCI_VENDOR_ID_IBM,
5885 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5886 .quirks = 0x00ffU,
5887 },
5888 { /* IBM ThinkPads with EC version string */
5889 .vendor = PCI_VENDOR_ID_IBM,
5890 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5891 .quirks = 0x00bfU,
5892 },
5893 };
5894
led_init_detect_mode(void)5895 static enum led_access_mode __init led_init_detect_mode(void)
5896 {
5897 acpi_status status;
5898
5899 if (tpacpi_is_ibm()) {
5900 /* 570 */
5901 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5902 if (ACPI_SUCCESS(status))
5903 return TPACPI_LED_570;
5904
5905 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5906 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5907 if (ACPI_SUCCESS(status))
5908 return TPACPI_LED_OLD;
5909 }
5910
5911 /* most others */
5912 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5913 if (ACPI_SUCCESS(status))
5914 return TPACPI_LED_NEW;
5915
5916 /* R30, R31, and unknown firmwares */
5917 led_handle = NULL;
5918 return TPACPI_LED_NONE;
5919 }
5920
led_init(struct ibm_init_struct * iibm)5921 static int __init led_init(struct ibm_init_struct *iibm)
5922 {
5923 unsigned int i;
5924 int rc;
5925 unsigned long useful_leds;
5926
5927 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5928
5929 led_supported = led_init_detect_mode();
5930
5931 if (led_supported != TPACPI_LED_NONE) {
5932 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5933 ARRAY_SIZE(led_useful_qtable));
5934
5935 if (!useful_leds) {
5936 led_handle = NULL;
5937 led_supported = TPACPI_LED_NONE;
5938 }
5939 }
5940
5941 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5942 str_supported(led_supported), led_supported);
5943
5944 if (led_supported == TPACPI_LED_NONE)
5945 return -ENODEV;
5946
5947 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
5948 GFP_KERNEL);
5949 if (!tpacpi_leds) {
5950 pr_err("Out of memory for LED data\n");
5951 return -ENOMEM;
5952 }
5953
5954 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5955 tpacpi_leds[i].led = -1;
5956
5957 if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) {
5958 rc = tpacpi_init_led(i);
5959 if (rc < 0) {
5960 led_exit();
5961 return rc;
5962 }
5963 }
5964 }
5965
5966 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5967 pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
5968 #endif
5969 return 0;
5970 }
5971
5972 #define str_led_status(s) ((s) >= TPACPI_LED_BLINK ? "blinking" : str_on_off(s))
5973
led_read(struct seq_file * m)5974 static int led_read(struct seq_file *m)
5975 {
5976 if (!led_supported) {
5977 seq_printf(m, "status:\t\tnot supported\n");
5978 return 0;
5979 }
5980 seq_printf(m, "status:\t\tsupported\n");
5981
5982 if (led_supported == TPACPI_LED_570) {
5983 /* 570 */
5984 int i, status;
5985 for (i = 0; i < 8; i++) {
5986 status = led_get_status(i);
5987 if (status < 0)
5988 return -EIO;
5989 seq_printf(m, "%d:\t\t%s\n", i, str_led_status(status));
5990 }
5991 }
5992
5993 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5994
5995 return 0;
5996 }
5997
led_write(char * buf)5998 static int led_write(char *buf)
5999 {
6000 char *cmd;
6001 int led, rc;
6002 enum led_status_t s;
6003
6004 if (!led_supported)
6005 return -ENODEV;
6006
6007 while ((cmd = strsep(&buf, ","))) {
6008 if (sscanf(cmd, "%d", &led) != 1)
6009 return -EINVAL;
6010
6011 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1))
6012 return -ENODEV;
6013
6014 if (tpacpi_leds[led].led < 0)
6015 return -ENODEV;
6016
6017 if (strstr(cmd, "off")) {
6018 s = TPACPI_LED_OFF;
6019 } else if (strstr(cmd, "on")) {
6020 s = TPACPI_LED_ON;
6021 } else if (strstr(cmd, "blink")) {
6022 s = TPACPI_LED_BLINK;
6023 } else {
6024 return -EINVAL;
6025 }
6026
6027 rc = led_set_status(led, s);
6028 if (rc < 0)
6029 return rc;
6030 }
6031
6032 return 0;
6033 }
6034
6035 static struct ibm_struct led_driver_data = {
6036 .name = "led",
6037 .read = led_read,
6038 .write = led_write,
6039 .exit = led_exit,
6040 };
6041
6042 /*************************************************************************
6043 * Beep subdriver
6044 */
6045
6046 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
6047
6048 #define TPACPI_BEEP_Q1 0x0001
6049
6050 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
6051 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
6052 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
6053 };
6054
beep_init(struct ibm_init_struct * iibm)6055 static int __init beep_init(struct ibm_init_struct *iibm)
6056 {
6057 unsigned long quirks;
6058
6059 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
6060
6061 TPACPI_ACPIHANDLE_INIT(beep);
6062
6063 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
6064 str_supported(beep_handle != NULL));
6065
6066 quirks = tpacpi_check_quirks(beep_quirk_table,
6067 ARRAY_SIZE(beep_quirk_table));
6068
6069 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
6070
6071 return (beep_handle) ? 0 : -ENODEV;
6072 }
6073
beep_read(struct seq_file * m)6074 static int beep_read(struct seq_file *m)
6075 {
6076 if (!beep_handle)
6077 seq_printf(m, "status:\t\tnot supported\n");
6078 else {
6079 seq_printf(m, "status:\t\tsupported\n");
6080 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
6081 }
6082
6083 return 0;
6084 }
6085
beep_write(char * buf)6086 static int beep_write(char *buf)
6087 {
6088 char *cmd;
6089 int beep_cmd;
6090
6091 if (!beep_handle)
6092 return -ENODEV;
6093
6094 while ((cmd = strsep(&buf, ","))) {
6095 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
6096 beep_cmd >= 0 && beep_cmd <= 17) {
6097 /* beep_cmd set */
6098 } else
6099 return -EINVAL;
6100 if (tp_features.beep_needs_two_args) {
6101 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
6102 beep_cmd, 0))
6103 return -EIO;
6104 } else {
6105 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
6106 beep_cmd))
6107 return -EIO;
6108 }
6109 }
6110
6111 return 0;
6112 }
6113
6114 static struct ibm_struct beep_driver_data = {
6115 .name = "beep",
6116 .read = beep_read,
6117 .write = beep_write,
6118 };
6119
6120 /*************************************************************************
6121 * Thermal subdriver
6122 */
6123
6124 enum thermal_access_mode {
6125 TPACPI_THERMAL_NONE = 0, /* No thermal support */
6126 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
6127 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
6128 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
6129 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
6130 };
6131
6132 enum { /* TPACPI_THERMAL_TPEC_* */
6133 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
6134 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
6135 TP_EC_FUNCREV = 0xEF, /* ACPI EC Functional revision */
6136 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
6137
6138 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
6139 };
6140
6141
6142 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
6143 struct ibm_thermal_sensors_struct {
6144 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
6145 };
6146
6147 static enum thermal_access_mode thermal_read_mode;
6148 static bool thermal_use_labels;
6149
6150 /* idx is zero-based */
thermal_get_sensor(int idx,s32 * value)6151 static int thermal_get_sensor(int idx, s32 *value)
6152 {
6153 int t;
6154 s8 tmp;
6155 char tmpi[5];
6156
6157 t = TP_EC_THERMAL_TMP0;
6158
6159 switch (thermal_read_mode) {
6160 #if TPACPI_MAX_THERMAL_SENSORS >= 16
6161 case TPACPI_THERMAL_TPEC_16:
6162 if (idx >= 8 && idx <= 15) {
6163 t = TP_EC_THERMAL_TMP8;
6164 idx -= 8;
6165 }
6166 #endif
6167 fallthrough;
6168 case TPACPI_THERMAL_TPEC_8:
6169 if (idx <= 7) {
6170 if (!acpi_ec_read(t + idx, &tmp))
6171 return -EIO;
6172 *value = tmp * 1000;
6173 return 0;
6174 }
6175 break;
6176
6177 case TPACPI_THERMAL_ACPI_UPDT:
6178 if (idx <= 7) {
6179 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6180 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
6181 return -EIO;
6182 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6183 return -EIO;
6184 *value = (t - 2732) * 100;
6185 return 0;
6186 }
6187 break;
6188
6189 case TPACPI_THERMAL_ACPI_TMP07:
6190 if (idx <= 7) {
6191 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6192 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6193 return -EIO;
6194 if (t > 127 || t < -127)
6195 t = TP_EC_THERMAL_TMP_NA;
6196 *value = t * 1000;
6197 return 0;
6198 }
6199 break;
6200
6201 case TPACPI_THERMAL_NONE:
6202 default:
6203 return -ENOSYS;
6204 }
6205
6206 return -EINVAL;
6207 }
6208
thermal_get_sensors(struct ibm_thermal_sensors_struct * s)6209 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
6210 {
6211 int res, i;
6212 int n;
6213
6214 n = 8;
6215 i = 0;
6216
6217 if (!s)
6218 return -EINVAL;
6219
6220 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
6221 n = 16;
6222
6223 for (i = 0 ; i < n; i++) {
6224 res = thermal_get_sensor(i, &s->temp[i]);
6225 if (res)
6226 return res;
6227 }
6228
6229 return n;
6230 }
6231
thermal_dump_all_sensors(void)6232 static void thermal_dump_all_sensors(void)
6233 {
6234 int n, i;
6235 struct ibm_thermal_sensors_struct t;
6236
6237 n = thermal_get_sensors(&t);
6238 if (n <= 0)
6239 return;
6240
6241 pr_notice("temperatures (Celsius):");
6242
6243 for (i = 0; i < n; i++) {
6244 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
6245 pr_cont(" %d", (int)(t.temp[i] / 1000));
6246 else
6247 pr_cont(" N/A");
6248 }
6249
6250 pr_cont("\n");
6251 }
6252
6253 /* sysfs temp##_input -------------------------------------------------- */
6254
thermal_temp_input_show(struct device * dev,struct device_attribute * attr,char * buf)6255 static ssize_t thermal_temp_input_show(struct device *dev,
6256 struct device_attribute *attr,
6257 char *buf)
6258 {
6259 struct sensor_device_attribute *sensor_attr =
6260 to_sensor_dev_attr(attr);
6261 int idx = sensor_attr->index;
6262 s32 value;
6263 int res;
6264
6265 res = thermal_get_sensor(idx, &value);
6266 if (res)
6267 return res;
6268 if (value == TPACPI_THERMAL_SENSOR_NA)
6269 return -ENXIO;
6270
6271 return sysfs_emit(buf, "%d\n", value);
6272 }
6273
6274 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
6275 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
6276 thermal_temp_input_show, NULL, _idxB)
6277
6278 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
6279 THERMAL_SENSOR_ATTR_TEMP(1, 0),
6280 THERMAL_SENSOR_ATTR_TEMP(2, 1),
6281 THERMAL_SENSOR_ATTR_TEMP(3, 2),
6282 THERMAL_SENSOR_ATTR_TEMP(4, 3),
6283 THERMAL_SENSOR_ATTR_TEMP(5, 4),
6284 THERMAL_SENSOR_ATTR_TEMP(6, 5),
6285 THERMAL_SENSOR_ATTR_TEMP(7, 6),
6286 THERMAL_SENSOR_ATTR_TEMP(8, 7),
6287 THERMAL_SENSOR_ATTR_TEMP(9, 8),
6288 THERMAL_SENSOR_ATTR_TEMP(10, 9),
6289 THERMAL_SENSOR_ATTR_TEMP(11, 10),
6290 THERMAL_SENSOR_ATTR_TEMP(12, 11),
6291 THERMAL_SENSOR_ATTR_TEMP(13, 12),
6292 THERMAL_SENSOR_ATTR_TEMP(14, 13),
6293 THERMAL_SENSOR_ATTR_TEMP(15, 14),
6294 THERMAL_SENSOR_ATTR_TEMP(16, 15),
6295 };
6296
6297 #define THERMAL_ATTRS(X) \
6298 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
6299
6300 static struct attribute *thermal_temp_input_attr[] = {
6301 THERMAL_ATTRS(0),
6302 THERMAL_ATTRS(1),
6303 THERMAL_ATTRS(2),
6304 THERMAL_ATTRS(3),
6305 THERMAL_ATTRS(4),
6306 THERMAL_ATTRS(5),
6307 THERMAL_ATTRS(6),
6308 THERMAL_ATTRS(7),
6309 THERMAL_ATTRS(8),
6310 THERMAL_ATTRS(9),
6311 THERMAL_ATTRS(10),
6312 THERMAL_ATTRS(11),
6313 THERMAL_ATTRS(12),
6314 THERMAL_ATTRS(13),
6315 THERMAL_ATTRS(14),
6316 THERMAL_ATTRS(15),
6317 NULL
6318 };
6319
thermal_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)6320 static umode_t thermal_attr_is_visible(struct kobject *kobj,
6321 struct attribute *attr, int n)
6322 {
6323 if (thermal_read_mode == TPACPI_THERMAL_NONE)
6324 return 0;
6325
6326 if (attr == THERMAL_ATTRS(8) || attr == THERMAL_ATTRS(9) ||
6327 attr == THERMAL_ATTRS(10) || attr == THERMAL_ATTRS(11) ||
6328 attr == THERMAL_ATTRS(12) || attr == THERMAL_ATTRS(13) ||
6329 attr == THERMAL_ATTRS(14) || attr == THERMAL_ATTRS(15)) {
6330 if (thermal_read_mode != TPACPI_THERMAL_TPEC_16)
6331 return 0;
6332 }
6333
6334 return attr->mode;
6335 }
6336
6337 static const struct attribute_group thermal_attr_group = {
6338 .is_visible = thermal_attr_is_visible,
6339 .attrs = thermal_temp_input_attr,
6340 };
6341
6342 #undef THERMAL_SENSOR_ATTR_TEMP
6343 #undef THERMAL_ATTRS
6344
temp1_label_show(struct device * dev,struct device_attribute * attr,char * buf)6345 static ssize_t temp1_label_show(struct device *dev, struct device_attribute *attr, char *buf)
6346 {
6347 return sysfs_emit(buf, "CPU\n");
6348 }
6349 static DEVICE_ATTR_RO(temp1_label);
6350
temp2_label_show(struct device * dev,struct device_attribute * attr,char * buf)6351 static ssize_t temp2_label_show(struct device *dev, struct device_attribute *attr, char *buf)
6352 {
6353 return sysfs_emit(buf, "GPU\n");
6354 }
6355 static DEVICE_ATTR_RO(temp2_label);
6356
6357 static struct attribute *temp_label_attributes[] = {
6358 &dev_attr_temp1_label.attr,
6359 &dev_attr_temp2_label.attr,
6360 NULL
6361 };
6362
temp_label_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)6363 static umode_t temp_label_attr_is_visible(struct kobject *kobj,
6364 struct attribute *attr, int n)
6365 {
6366 return thermal_use_labels ? attr->mode : 0;
6367 }
6368
6369 static const struct attribute_group temp_label_attr_group = {
6370 .is_visible = temp_label_attr_is_visible,
6371 .attrs = temp_label_attributes,
6372 };
6373
6374 /* --------------------------------------------------------------------- */
6375
thermal_init(struct ibm_init_struct * iibm)6376 static int __init thermal_init(struct ibm_init_struct *iibm)
6377 {
6378 u8 t, ta1, ta2, ver = 0;
6379 int i;
6380 int acpi_tmp7;
6381
6382 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
6383
6384 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
6385
6386 if (thinkpad_id.ec_model) {
6387 /*
6388 * Direct EC access mode: sensors at registers
6389 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
6390 * non-implemented, thermal sensors return 0x80 when
6391 * not available
6392 * The above rule is unfortunately flawed. This has been seen with
6393 * 0xC2 (power supply ID) causing thermal control problems.
6394 * The EC version can be determined by offset 0xEF and at least for
6395 * version 3 the Lenovo firmware team confirmed that registers 0xC0-0xC7
6396 * are not thermal registers.
6397 */
6398 if (!acpi_ec_read(TP_EC_FUNCREV, &ver))
6399 pr_warn("Thinkpad ACPI EC unable to access EC version\n");
6400
6401 ta1 = ta2 = 0;
6402 for (i = 0; i < 8; i++) {
6403 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
6404 ta1 |= t;
6405 } else {
6406 ta1 = 0;
6407 break;
6408 }
6409 if (ver < 3) {
6410 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
6411 ta2 |= t;
6412 } else {
6413 ta1 = 0;
6414 break;
6415 }
6416 }
6417 }
6418 if (ta1 == 0) {
6419 /* This is sheer paranoia, but we handle it anyway */
6420 if (acpi_tmp7) {
6421 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
6422 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6423 } else {
6424 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
6425 thermal_read_mode = TPACPI_THERMAL_NONE;
6426 }
6427 } else {
6428 if (ver >= 3) {
6429 thermal_read_mode = TPACPI_THERMAL_TPEC_8;
6430 thermal_use_labels = true;
6431 } else {
6432 thermal_read_mode =
6433 (ta2 != 0) ?
6434 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6435 }
6436 }
6437 } else if (acpi_tmp7) {
6438 if (tpacpi_is_ibm() &&
6439 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6440 /* 600e/x, 770e, 770x */
6441 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6442 } else {
6443 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6444 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6445 }
6446 } else {
6447 /* temperatures not supported on 570, G4x, R30, R31, R32 */
6448 thermal_read_mode = TPACPI_THERMAL_NONE;
6449 }
6450
6451 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6452 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6453 thermal_read_mode);
6454
6455 return thermal_read_mode != TPACPI_THERMAL_NONE ? 0 : -ENODEV;
6456 }
6457
thermal_read(struct seq_file * m)6458 static int thermal_read(struct seq_file *m)
6459 {
6460 int n, i;
6461 struct ibm_thermal_sensors_struct t;
6462
6463 n = thermal_get_sensors(&t);
6464 if (unlikely(n < 0))
6465 return n;
6466
6467 seq_printf(m, "temperatures:\t");
6468
6469 if (n > 0) {
6470 for (i = 0; i < (n - 1); i++)
6471 seq_printf(m, "%d ", t.temp[i] / 1000);
6472 seq_printf(m, "%d\n", t.temp[i] / 1000);
6473 } else
6474 seq_printf(m, "not supported\n");
6475
6476 return 0;
6477 }
6478
6479 static struct ibm_struct thermal_driver_data = {
6480 .name = "thermal",
6481 .read = thermal_read,
6482 };
6483
6484 /*************************************************************************
6485 * Backlight/brightness subdriver
6486 */
6487
6488 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6489
6490 /*
6491 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6492 * CMOS NVRAM byte 0x5E, bits 0-3.
6493 *
6494 * EC HBRV (0x31) has the following layout
6495 * Bit 7: unknown function
6496 * Bit 6: unknown function
6497 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
6498 * Bit 4: must be set to zero to avoid problems
6499 * Bit 3-0: backlight brightness level
6500 *
6501 * brightness_get_raw returns status data in the HBRV layout
6502 *
6503 * WARNING: The X61 has been verified to use HBRV for something else, so
6504 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6505 * testing on the very early *60 Lenovo models...
6506 */
6507
6508 enum {
6509 TP_EC_BACKLIGHT = 0x31,
6510
6511 /* TP_EC_BACKLIGHT bitmasks */
6512 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6513 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6514 TP_EC_BACKLIGHT_MAPSW = 0x20,
6515 };
6516
6517 enum tpacpi_brightness_access_mode {
6518 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
6519 TPACPI_BRGHT_MODE_EC, /* EC control */
6520 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
6521 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6522 TPACPI_BRGHT_MODE_MAX
6523 };
6524
6525 static struct backlight_device *ibm_backlight_device;
6526
6527 static enum tpacpi_brightness_access_mode brightness_mode =
6528 TPACPI_BRGHT_MODE_MAX;
6529
6530 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6531
6532 static struct mutex brightness_mutex;
6533
6534 /* NVRAM brightness access */
tpacpi_brightness_nvram_get(void)6535 static unsigned int tpacpi_brightness_nvram_get(void)
6536 {
6537 u8 lnvram;
6538
6539 lockdep_assert_held(&brightness_mutex);
6540
6541 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6542 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6543 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6544 lnvram &= bright_maxlvl;
6545
6546 return lnvram;
6547 }
6548
tpacpi_brightness_checkpoint_nvram(void)6549 static void tpacpi_brightness_checkpoint_nvram(void)
6550 {
6551 u8 lec = 0;
6552 u8 b_nvram;
6553
6554 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6555 return;
6556
6557 vdbg_printk(TPACPI_DBG_BRGHT,
6558 "trying to checkpoint backlight level to NVRAM...\n");
6559
6560 if (mutex_lock_killable(&brightness_mutex) < 0)
6561 return;
6562
6563 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6564 goto unlock;
6565 lec &= TP_EC_BACKLIGHT_LVLMSK;
6566 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6567
6568 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6569 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6570 /* NVRAM needs update */
6571 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6572 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6573 b_nvram |= lec;
6574 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6575 dbg_printk(TPACPI_DBG_BRGHT,
6576 "updated NVRAM backlight level to %u (0x%02x)\n",
6577 (unsigned int) lec, (unsigned int) b_nvram);
6578 } else
6579 vdbg_printk(TPACPI_DBG_BRGHT,
6580 "NVRAM backlight level already is %u (0x%02x)\n",
6581 (unsigned int) lec, (unsigned int) b_nvram);
6582
6583 unlock:
6584 mutex_unlock(&brightness_mutex);
6585 }
6586
6587
tpacpi_brightness_get_raw(int * status)6588 static int tpacpi_brightness_get_raw(int *status)
6589 {
6590 u8 lec = 0;
6591
6592 lockdep_assert_held(&brightness_mutex);
6593
6594 switch (brightness_mode) {
6595 case TPACPI_BRGHT_MODE_UCMS_STEP:
6596 *status = tpacpi_brightness_nvram_get();
6597 return 0;
6598 case TPACPI_BRGHT_MODE_EC:
6599 case TPACPI_BRGHT_MODE_ECNVRAM:
6600 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6601 return -EIO;
6602 *status = lec;
6603 return 0;
6604 default:
6605 return -ENXIO;
6606 }
6607 }
6608
6609 /* do NOT call with illegal backlight level value */
tpacpi_brightness_set_ec(unsigned int value)6610 static int tpacpi_brightness_set_ec(unsigned int value)
6611 {
6612 u8 lec = 0;
6613
6614 lockdep_assert_held(&brightness_mutex);
6615
6616 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6617 return -EIO;
6618
6619 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6620 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6621 (value & TP_EC_BACKLIGHT_LVLMSK))))
6622 return -EIO;
6623
6624 return 0;
6625 }
6626
tpacpi_brightness_set_ucmsstep(unsigned int value)6627 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6628 {
6629 int cmos_cmd, inc;
6630 unsigned int current_value, i;
6631
6632 lockdep_assert_held(&brightness_mutex);
6633
6634 current_value = tpacpi_brightness_nvram_get();
6635
6636 if (value == current_value)
6637 return 0;
6638
6639 cmos_cmd = (value > current_value) ?
6640 TP_CMOS_BRIGHTNESS_UP :
6641 TP_CMOS_BRIGHTNESS_DOWN;
6642 inc = (value > current_value) ? 1 : -1;
6643
6644 for (i = current_value; i != value; i += inc)
6645 if (issue_thinkpad_cmos_command(cmos_cmd))
6646 return -EIO;
6647
6648 return 0;
6649 }
6650
6651 /* May return EINTR which can always be mapped to ERESTARTSYS */
brightness_set(unsigned int value)6652 static int brightness_set(unsigned int value)
6653 {
6654 int res;
6655
6656 if (value > bright_maxlvl)
6657 return -EINVAL;
6658
6659 vdbg_printk(TPACPI_DBG_BRGHT,
6660 "set backlight level to %d\n", value);
6661
6662 res = mutex_lock_killable(&brightness_mutex);
6663 if (res < 0)
6664 return res;
6665
6666 switch (brightness_mode) {
6667 case TPACPI_BRGHT_MODE_EC:
6668 case TPACPI_BRGHT_MODE_ECNVRAM:
6669 res = tpacpi_brightness_set_ec(value);
6670 break;
6671 case TPACPI_BRGHT_MODE_UCMS_STEP:
6672 res = tpacpi_brightness_set_ucmsstep(value);
6673 break;
6674 default:
6675 res = -ENXIO;
6676 }
6677
6678 mutex_unlock(&brightness_mutex);
6679 return res;
6680 }
6681
6682 /* sysfs backlight class ----------------------------------------------- */
6683
brightness_update_status(struct backlight_device * bd)6684 static int brightness_update_status(struct backlight_device *bd)
6685 {
6686 int level = backlight_get_brightness(bd);
6687
6688 dbg_printk(TPACPI_DBG_BRGHT,
6689 "backlight: attempt to set level to %d\n",
6690 level);
6691
6692 /* it is the backlight class's job (caller) to handle
6693 * EINTR and other errors properly */
6694 return brightness_set(level);
6695 }
6696
brightness_get(struct backlight_device * bd)6697 static int brightness_get(struct backlight_device *bd)
6698 {
6699 int status, res;
6700
6701 res = mutex_lock_killable(&brightness_mutex);
6702 if (res < 0)
6703 return 0;
6704
6705 res = tpacpi_brightness_get_raw(&status);
6706
6707 mutex_unlock(&brightness_mutex);
6708
6709 if (res < 0)
6710 return 0;
6711
6712 return status & TP_EC_BACKLIGHT_LVLMSK;
6713 }
6714
tpacpi_brightness_notify_change(void)6715 static void tpacpi_brightness_notify_change(void)
6716 {
6717 backlight_force_update(ibm_backlight_device,
6718 BACKLIGHT_UPDATE_HOTKEY);
6719 }
6720
6721 static const struct backlight_ops ibm_backlight_data = {
6722 .get_brightness = brightness_get,
6723 .update_status = brightness_update_status,
6724 };
6725
6726 /* --------------------------------------------------------------------- */
6727
tpacpi_evaluate_bcl(struct acpi_device * adev,void * not_used)6728 static int __init tpacpi_evaluate_bcl(struct acpi_device *adev, void *not_used)
6729 {
6730 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6731 union acpi_object *obj;
6732 acpi_status status;
6733 int rc;
6734
6735 status = acpi_evaluate_object(adev->handle, "_BCL", NULL, &buffer);
6736 if (ACPI_FAILURE(status))
6737 return 0;
6738
6739 obj = buffer.pointer;
6740 if (!obj || obj->type != ACPI_TYPE_PACKAGE) {
6741 acpi_handle_info(adev->handle,
6742 "Unknown _BCL data, please report this to %s\n",
6743 TPACPI_MAIL);
6744 rc = 0;
6745 } else {
6746 rc = obj->package.count;
6747 }
6748 kfree(obj);
6749
6750 return rc;
6751 }
6752
6753 /*
6754 * Call _BCL method of video device. On some ThinkPads this will
6755 * switch the firmware to the ACPI brightness control mode.
6756 */
6757
tpacpi_query_bcl_levels(acpi_handle handle)6758 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6759 {
6760 struct acpi_device *device;
6761
6762 device = acpi_fetch_acpi_dev(handle);
6763 if (!device)
6764 return 0;
6765
6766 return acpi_dev_for_each_child(device, tpacpi_evaluate_bcl, NULL);
6767 }
6768
6769
6770 /*
6771 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6772 */
tpacpi_check_std_acpi_brightness_support(void)6773 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6774 {
6775 acpi_handle video_device;
6776 int bcl_levels = 0;
6777
6778 tpacpi_acpi_handle_locate("video", NULL, &video_device);
6779 if (video_device)
6780 bcl_levels = tpacpi_query_bcl_levels(video_device);
6781
6782 tp_features.bright_acpimode = (bcl_levels > 0);
6783
6784 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6785 }
6786
6787 /*
6788 * These are only useful for models that have only one possibility
6789 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6790 * these quirks.
6791 */
6792 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6793 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6794 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6795
6796 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6797 /* Models with ATI GPUs known to require ECNVRAM mode */
6798 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6799
6800 /* Models with ATI GPUs that can use ECNVRAM */
6801 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6802 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6803 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6804 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6805
6806 /* Models with Intel Extreme Graphics 2 */
6807 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6808 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6809 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6810
6811 /* Models with Intel GMA900 */
6812 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6813 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6814 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6815 };
6816
6817 /*
6818 * Returns < 0 for error, otherwise sets tp_features.bright_*
6819 * and bright_maxlvl.
6820 */
tpacpi_detect_brightness_capabilities(void)6821 static void __init tpacpi_detect_brightness_capabilities(void)
6822 {
6823 unsigned int b;
6824
6825 vdbg_printk(TPACPI_DBG_INIT,
6826 "detecting firmware brightness interface capabilities\n");
6827
6828 /* we could run a quirks check here (same table used by
6829 * brightness_init) if needed */
6830
6831 /*
6832 * We always attempt to detect acpi support, so as to switch
6833 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6834 * going to publish a backlight interface
6835 */
6836 b = tpacpi_check_std_acpi_brightness_support();
6837 switch (b) {
6838 case 16:
6839 bright_maxlvl = 15;
6840 break;
6841 case 8:
6842 case 0:
6843 bright_maxlvl = 7;
6844 break;
6845 default:
6846 tp_features.bright_unkfw = 1;
6847 bright_maxlvl = b - 1;
6848 }
6849 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
6850 }
6851
brightness_init(struct ibm_init_struct * iibm)6852 static int __init brightness_init(struct ibm_init_struct *iibm)
6853 {
6854 struct backlight_properties props;
6855 int b;
6856 unsigned long quirks;
6857
6858 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6859
6860 mutex_init(&brightness_mutex);
6861
6862 quirks = tpacpi_check_quirks(brightness_quirk_table,
6863 ARRAY_SIZE(brightness_quirk_table));
6864
6865 /* tpacpi_detect_brightness_capabilities() must have run already */
6866
6867 /* if it is unknown, we don't handle it: it wouldn't be safe */
6868 if (tp_features.bright_unkfw)
6869 return -ENODEV;
6870
6871 if (!brightness_enable) {
6872 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6873 "brightness support disabled by module parameter\n");
6874 return -ENODEV;
6875 }
6876
6877 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6878 if (brightness_enable > 1) {
6879 pr_info("Standard ACPI backlight interface available, not loading native one\n");
6880 return -ENODEV;
6881 } else if (brightness_enable == 1) {
6882 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n");
6883 return -ENODEV;
6884 }
6885 } else if (!tp_features.bright_acpimode) {
6886 pr_notice("ACPI backlight interface not available\n");
6887 return -ENODEV;
6888 }
6889
6890 pr_notice("ACPI native brightness control enabled\n");
6891
6892 /*
6893 * Check for module parameter bogosity, note that we
6894 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6895 * able to detect "unspecified"
6896 */
6897 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6898 return -EINVAL;
6899
6900 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6901 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6902 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6903 if (quirks & TPACPI_BRGHT_Q_EC)
6904 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6905 else
6906 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6907
6908 dbg_printk(TPACPI_DBG_BRGHT,
6909 "driver auto-selected brightness_mode=%d\n",
6910 brightness_mode);
6911 }
6912
6913 /* Safety */
6914 if (!tpacpi_is_ibm() &&
6915 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6916 brightness_mode == TPACPI_BRGHT_MODE_EC))
6917 return -EINVAL;
6918
6919 if (tpacpi_brightness_get_raw(&b) < 0)
6920 return -ENODEV;
6921
6922 memset(&props, 0, sizeof(struct backlight_properties));
6923 props.type = BACKLIGHT_PLATFORM;
6924 props.max_brightness = bright_maxlvl;
6925 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6926 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6927 NULL, NULL,
6928 &ibm_backlight_data,
6929 &props);
6930 if (IS_ERR(ibm_backlight_device)) {
6931 int rc = PTR_ERR(ibm_backlight_device);
6932 ibm_backlight_device = NULL;
6933 pr_err("Could not register backlight device\n");
6934 return rc;
6935 }
6936 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6937 "brightness is supported\n");
6938
6939 if (quirks & TPACPI_BRGHT_Q_ASK) {
6940 pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
6941 brightness_mode);
6942 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
6943 TPACPI_MAIL);
6944 }
6945
6946 /* Added by mistake in early 2007. Probably useless, but it could
6947 * be working around some unknown firmware problem where the value
6948 * read at startup doesn't match the real hardware state... so leave
6949 * it in place just in case */
6950 backlight_update_status(ibm_backlight_device);
6951
6952 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6953 "brightness: registering brightness hotkeys as change notification\n");
6954 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6955 | TP_ACPI_HKEY_BRGHTUP_MASK
6956 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6957 return 0;
6958 }
6959
brightness_suspend(void)6960 static void brightness_suspend(void)
6961 {
6962 tpacpi_brightness_checkpoint_nvram();
6963 }
6964
brightness_shutdown(void)6965 static void brightness_shutdown(void)
6966 {
6967 tpacpi_brightness_checkpoint_nvram();
6968 }
6969
brightness_exit(void)6970 static void brightness_exit(void)
6971 {
6972 if (ibm_backlight_device) {
6973 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6974 "calling backlight_device_unregister()\n");
6975 backlight_device_unregister(ibm_backlight_device);
6976 }
6977
6978 tpacpi_brightness_checkpoint_nvram();
6979 }
6980
brightness_read(struct seq_file * m)6981 static int brightness_read(struct seq_file *m)
6982 {
6983 int level;
6984
6985 level = brightness_get(NULL);
6986 if (level < 0) {
6987 seq_printf(m, "level:\t\tunreadable\n");
6988 } else {
6989 seq_printf(m, "level:\t\t%d\n", level);
6990 seq_printf(m, "commands:\tup, down\n");
6991 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6992 bright_maxlvl);
6993 }
6994
6995 return 0;
6996 }
6997
brightness_write(char * buf)6998 static int brightness_write(char *buf)
6999 {
7000 int level;
7001 int rc;
7002 char *cmd;
7003
7004 level = brightness_get(NULL);
7005 if (level < 0)
7006 return level;
7007
7008 while ((cmd = strsep(&buf, ","))) {
7009 if (strstarts(cmd, "up")) {
7010 if (level < bright_maxlvl)
7011 level++;
7012 } else if (strstarts(cmd, "down")) {
7013 if (level > 0)
7014 level--;
7015 } else if (sscanf(cmd, "level %d", &level) == 1 &&
7016 level >= 0 && level <= bright_maxlvl) {
7017 /* new level set */
7018 } else
7019 return -EINVAL;
7020 }
7021
7022 tpacpi_disclose_usertask("procfs brightness",
7023 "set level to %d\n", level);
7024
7025 /*
7026 * Now we know what the final level should be, so we try to set it.
7027 * Doing it this way makes the syscall restartable in case of EINTR
7028 */
7029 rc = brightness_set(level);
7030 if (!rc && ibm_backlight_device)
7031 backlight_force_update(ibm_backlight_device,
7032 BACKLIGHT_UPDATE_SYSFS);
7033 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7034 }
7035
7036 static struct ibm_struct brightness_driver_data = {
7037 .name = "brightness",
7038 .read = brightness_read,
7039 .write = brightness_write,
7040 .exit = brightness_exit,
7041 .suspend = brightness_suspend,
7042 .shutdown = brightness_shutdown,
7043 };
7044
7045 /*************************************************************************
7046 * Volume subdriver
7047 */
7048
7049 /*
7050 * IBM ThinkPads have a simple volume controller with MUTE gating.
7051 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
7052 *
7053 * Since the *61 series (and probably also the later *60 series), Lenovo
7054 * ThinkPads only implement the MUTE gate.
7055 *
7056 * EC register 0x30
7057 * Bit 6: MUTE (1 mutes sound)
7058 * Bit 3-0: Volume
7059 * Other bits should be zero as far as we know.
7060 *
7061 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
7062 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
7063 * such as bit 7 which is used to detect repeated presses of MUTE,
7064 * and we leave them unchanged.
7065 *
7066 * On newer Lenovo ThinkPads, the EC can automatically change the volume
7067 * in response to user input. Unfortunately, this rarely works well.
7068 * The laptop changes the state of its internal MUTE gate and, on some
7069 * models, sends KEY_MUTE, causing any user code that responds to the
7070 * mute button to get confused. The hardware MUTE gate is also
7071 * unnecessary, since user code can handle the mute button without
7072 * kernel or EC help.
7073 *
7074 * To avoid confusing userspace, we simply disable all EC-based mute
7075 * and volume controls when possible.
7076 */
7077
7078 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
7079
7080 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
7081 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
7082 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
7083
7084 #if SNDRV_CARDS <= 32
7085 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1)
7086 #else
7087 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1)
7088 #endif
7089 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
7090 static char *alsa_id = "ThinkPadEC";
7091 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
7092
7093 struct tpacpi_alsa_data {
7094 struct snd_card *card;
7095 struct snd_ctl_elem_id *ctl_mute_id;
7096 struct snd_ctl_elem_id *ctl_vol_id;
7097 };
7098
7099 static struct snd_card *alsa_card;
7100
7101 enum {
7102 TP_EC_AUDIO = 0x30,
7103
7104 /* TP_EC_AUDIO bits */
7105 TP_EC_AUDIO_MUTESW = 6,
7106
7107 /* TP_EC_AUDIO bitmasks */
7108 TP_EC_AUDIO_LVL_MSK = 0x0F,
7109 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
7110
7111 /* Maximum volume */
7112 TP_EC_VOLUME_MAX = 14,
7113 };
7114
7115 enum tpacpi_volume_access_mode {
7116 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
7117 TPACPI_VOL_MODE_EC, /* Pure EC control */
7118 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
7119 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
7120 TPACPI_VOL_MODE_MAX
7121 };
7122
7123 enum tpacpi_volume_capabilities {
7124 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
7125 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
7126 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
7127 TPACPI_VOL_CAP_MAX
7128 };
7129
7130 enum tpacpi_mute_btn_mode {
7131 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */
7132 /* We don't know what mode 1 is. */
7133 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */
7134 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */
7135 };
7136
7137 static enum tpacpi_volume_access_mode volume_mode =
7138 TPACPI_VOL_MODE_MAX;
7139
7140 static enum tpacpi_volume_capabilities volume_capabilities;
7141 static bool volume_control_allowed;
7142 static bool software_mute_requested = true;
7143 static bool software_mute_active;
7144 static int software_mute_orig_mode;
7145
7146 /*
7147 * Used to syncronize writers to TP_EC_AUDIO and
7148 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
7149 */
7150 static struct mutex volume_mutex;
7151
tpacpi_volume_checkpoint_nvram(void)7152 static void tpacpi_volume_checkpoint_nvram(void)
7153 {
7154 u8 lec = 0;
7155 u8 b_nvram;
7156 u8 ec_mask;
7157
7158 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
7159 return;
7160 if (!volume_control_allowed)
7161 return;
7162 if (software_mute_active)
7163 return;
7164
7165 vdbg_printk(TPACPI_DBG_MIXER,
7166 "trying to checkpoint mixer state to NVRAM...\n");
7167
7168 if (tp_features.mixer_no_level_control)
7169 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
7170 else
7171 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
7172
7173 if (mutex_lock_killable(&volume_mutex) < 0)
7174 return;
7175
7176 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
7177 goto unlock;
7178 lec &= ec_mask;
7179 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
7180
7181 if (lec != (b_nvram & ec_mask)) {
7182 /* NVRAM needs update */
7183 b_nvram &= ~ec_mask;
7184 b_nvram |= lec;
7185 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
7186 dbg_printk(TPACPI_DBG_MIXER,
7187 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
7188 (unsigned int) lec, (unsigned int) b_nvram);
7189 } else {
7190 vdbg_printk(TPACPI_DBG_MIXER,
7191 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
7192 (unsigned int) lec, (unsigned int) b_nvram);
7193 }
7194
7195 unlock:
7196 mutex_unlock(&volume_mutex);
7197 }
7198
volume_get_status_ec(u8 * status)7199 static int volume_get_status_ec(u8 *status)
7200 {
7201 u8 s;
7202
7203 if (!acpi_ec_read(TP_EC_AUDIO, &s))
7204 return -EIO;
7205
7206 *status = s;
7207
7208 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
7209
7210 return 0;
7211 }
7212
volume_get_status(u8 * status)7213 static int volume_get_status(u8 *status)
7214 {
7215 return volume_get_status_ec(status);
7216 }
7217
volume_set_status_ec(const u8 status)7218 static int volume_set_status_ec(const u8 status)
7219 {
7220 if (!acpi_ec_write(TP_EC_AUDIO, status))
7221 return -EIO;
7222
7223 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
7224
7225 /*
7226 * On X200s, and possibly on others, it can take a while for
7227 * reads to become correct.
7228 */
7229 msleep(1);
7230
7231 return 0;
7232 }
7233
volume_set_status(const u8 status)7234 static int volume_set_status(const u8 status)
7235 {
7236 return volume_set_status_ec(status);
7237 }
7238
7239 /* returns < 0 on error, 0 on no change, 1 on change */
__volume_set_mute_ec(const bool mute)7240 static int __volume_set_mute_ec(const bool mute)
7241 {
7242 int rc;
7243 u8 s, n;
7244
7245 if (mutex_lock_killable(&volume_mutex) < 0)
7246 return -EINTR;
7247
7248 rc = volume_get_status_ec(&s);
7249 if (rc)
7250 goto unlock;
7251
7252 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
7253 s & ~TP_EC_AUDIO_MUTESW_MSK;
7254
7255 if (n != s) {
7256 rc = volume_set_status_ec(n);
7257 if (!rc)
7258 rc = 1;
7259 }
7260
7261 unlock:
7262 mutex_unlock(&volume_mutex);
7263 return rc;
7264 }
7265
volume_alsa_set_mute(const bool mute)7266 static int volume_alsa_set_mute(const bool mute)
7267 {
7268 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
7269 (mute) ? "" : "un");
7270 return __volume_set_mute_ec(mute);
7271 }
7272
volume_set_mute(const bool mute)7273 static int volume_set_mute(const bool mute)
7274 {
7275 int rc;
7276
7277 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
7278 (mute) ? "" : "un");
7279
7280 rc = __volume_set_mute_ec(mute);
7281 return (rc < 0) ? rc : 0;
7282 }
7283
7284 /* returns < 0 on error, 0 on no change, 1 on change */
__volume_set_volume_ec(const u8 vol)7285 static int __volume_set_volume_ec(const u8 vol)
7286 {
7287 int rc;
7288 u8 s, n;
7289
7290 if (vol > TP_EC_VOLUME_MAX)
7291 return -EINVAL;
7292
7293 if (mutex_lock_killable(&volume_mutex) < 0)
7294 return -EINTR;
7295
7296 rc = volume_get_status_ec(&s);
7297 if (rc)
7298 goto unlock;
7299
7300 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
7301
7302 if (n != s) {
7303 rc = volume_set_status_ec(n);
7304 if (!rc)
7305 rc = 1;
7306 }
7307
7308 unlock:
7309 mutex_unlock(&volume_mutex);
7310 return rc;
7311 }
7312
volume_set_software_mute(bool startup)7313 static int volume_set_software_mute(bool startup)
7314 {
7315 int result;
7316
7317 if (!tpacpi_is_lenovo())
7318 return -ENODEV;
7319
7320 if (startup) {
7321 if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
7322 "HAUM", "qd"))
7323 return -EIO;
7324
7325 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7326 "Initial HAUM setting was %d\n",
7327 software_mute_orig_mode);
7328 }
7329
7330 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
7331 (int)TP_EC_MUTE_BTN_NONE))
7332 return -EIO;
7333
7334 if (result != TP_EC_MUTE_BTN_NONE)
7335 pr_warn("Unexpected SAUM result %d\n",
7336 result);
7337
7338 /*
7339 * In software mute mode, the standard codec controls take
7340 * precendence, so we unmute the ThinkPad HW switch at
7341 * startup. Just on case there are SAUM-capable ThinkPads
7342 * with level controls, set max HW volume as well.
7343 */
7344 if (tp_features.mixer_no_level_control)
7345 result = volume_set_mute(false);
7346 else
7347 result = volume_set_status(TP_EC_VOLUME_MAX);
7348
7349 if (result != 0)
7350 pr_warn("Failed to unmute the HW mute switch\n");
7351
7352 return 0;
7353 }
7354
volume_exit_software_mute(void)7355 static void volume_exit_software_mute(void)
7356 {
7357 int r;
7358
7359 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
7360 || r != software_mute_orig_mode)
7361 pr_warn("Failed to restore mute mode\n");
7362 }
7363
volume_alsa_set_volume(const u8 vol)7364 static int volume_alsa_set_volume(const u8 vol)
7365 {
7366 dbg_printk(TPACPI_DBG_MIXER,
7367 "ALSA: trying to set volume level to %hu\n", vol);
7368 return __volume_set_volume_ec(vol);
7369 }
7370
volume_alsa_notify_change(void)7371 static void volume_alsa_notify_change(void)
7372 {
7373 struct tpacpi_alsa_data *d;
7374
7375 if (alsa_card && alsa_card->private_data) {
7376 d = alsa_card->private_data;
7377 if (d->ctl_mute_id)
7378 snd_ctl_notify(alsa_card,
7379 SNDRV_CTL_EVENT_MASK_VALUE,
7380 d->ctl_mute_id);
7381 if (d->ctl_vol_id)
7382 snd_ctl_notify(alsa_card,
7383 SNDRV_CTL_EVENT_MASK_VALUE,
7384 d->ctl_vol_id);
7385 }
7386 }
7387
volume_alsa_vol_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)7388 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7389 struct snd_ctl_elem_info *uinfo)
7390 {
7391 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7392 uinfo->count = 1;
7393 uinfo->value.integer.min = 0;
7394 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7395 return 0;
7396 }
7397
volume_alsa_vol_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7398 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7399 struct snd_ctl_elem_value *ucontrol)
7400 {
7401 u8 s;
7402 int rc;
7403
7404 rc = volume_get_status(&s);
7405 if (rc < 0)
7406 return rc;
7407
7408 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7409 return 0;
7410 }
7411
volume_alsa_vol_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7412 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7413 struct snd_ctl_elem_value *ucontrol)
7414 {
7415 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7416 ucontrol->value.integer.value[0]);
7417 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7418 }
7419
7420 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7421
volume_alsa_mute_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7422 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7423 struct snd_ctl_elem_value *ucontrol)
7424 {
7425 u8 s;
7426 int rc;
7427
7428 rc = volume_get_status(&s);
7429 if (rc < 0)
7430 return rc;
7431
7432 ucontrol->value.integer.value[0] =
7433 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7434 return 0;
7435 }
7436
volume_alsa_mute_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)7437 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7438 struct snd_ctl_elem_value *ucontrol)
7439 {
7440 tpacpi_disclose_usertask("ALSA", "%smute\n",
7441 ucontrol->value.integer.value[0] ?
7442 "un" : "");
7443 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7444 }
7445
7446 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7447 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7448 .name = "Console Playback Volume",
7449 .index = 0,
7450 .access = SNDRV_CTL_ELEM_ACCESS_READ,
7451 .info = volume_alsa_vol_info,
7452 .get = volume_alsa_vol_get,
7453 };
7454
7455 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7456 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7457 .name = "Console Playback Switch",
7458 .index = 0,
7459 .access = SNDRV_CTL_ELEM_ACCESS_READ,
7460 .info = volume_alsa_mute_info,
7461 .get = volume_alsa_mute_get,
7462 };
7463
volume_suspend(void)7464 static void volume_suspend(void)
7465 {
7466 tpacpi_volume_checkpoint_nvram();
7467 }
7468
volume_resume(void)7469 static void volume_resume(void)
7470 {
7471 if (software_mute_active) {
7472 if (volume_set_software_mute(false) < 0)
7473 pr_warn("Failed to restore software mute\n");
7474 } else {
7475 volume_alsa_notify_change();
7476 }
7477 }
7478
volume_shutdown(void)7479 static void volume_shutdown(void)
7480 {
7481 tpacpi_volume_checkpoint_nvram();
7482 }
7483
volume_exit(void)7484 static void volume_exit(void)
7485 {
7486 if (alsa_card) {
7487 snd_card_free(alsa_card);
7488 alsa_card = NULL;
7489 }
7490
7491 tpacpi_volume_checkpoint_nvram();
7492
7493 if (software_mute_active)
7494 volume_exit_software_mute();
7495 }
7496
volume_create_alsa_mixer(void)7497 static int __init volume_create_alsa_mixer(void)
7498 {
7499 struct snd_card *card;
7500 struct tpacpi_alsa_data *data;
7501 struct snd_kcontrol *ctl_vol;
7502 struct snd_kcontrol *ctl_mute;
7503 int rc;
7504
7505 rc = snd_card_new(&tpacpi_pdev->dev,
7506 alsa_index, alsa_id, THIS_MODULE,
7507 sizeof(struct tpacpi_alsa_data), &card);
7508 if (rc < 0 || !card) {
7509 pr_err("Failed to create ALSA card structures: %d\n", rc);
7510 return -ENODEV;
7511 }
7512
7513 BUG_ON(!card->private_data);
7514 data = card->private_data;
7515 data->card = card;
7516
7517 strscpy(card->driver, TPACPI_ALSA_DRVNAME,
7518 sizeof(card->driver));
7519 strscpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7520 sizeof(card->shortname));
7521 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7522 (thinkpad_id.ec_version_str) ?
7523 thinkpad_id.ec_version_str : "(unknown)");
7524 snprintf(card->longname, sizeof(card->longname),
7525 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7526 (thinkpad_id.ec_version_str) ?
7527 thinkpad_id.ec_version_str : "unknown");
7528
7529 if (volume_control_allowed) {
7530 volume_alsa_control_vol.put = volume_alsa_vol_put;
7531 volume_alsa_control_vol.access =
7532 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7533
7534 volume_alsa_control_mute.put = volume_alsa_mute_put;
7535 volume_alsa_control_mute.access =
7536 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7537 }
7538
7539 if (!tp_features.mixer_no_level_control) {
7540 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7541 rc = snd_ctl_add(card, ctl_vol);
7542 if (rc < 0) {
7543 pr_err("Failed to create ALSA volume control: %d\n",
7544 rc);
7545 goto err_exit;
7546 }
7547 data->ctl_vol_id = &ctl_vol->id;
7548 }
7549
7550 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7551 rc = snd_ctl_add(card, ctl_mute);
7552 if (rc < 0) {
7553 pr_err("Failed to create ALSA mute control: %d\n", rc);
7554 goto err_exit;
7555 }
7556 data->ctl_mute_id = &ctl_mute->id;
7557
7558 rc = snd_card_register(card);
7559 if (rc < 0) {
7560 pr_err("Failed to register ALSA card: %d\n", rc);
7561 goto err_exit;
7562 }
7563
7564 alsa_card = card;
7565 return 0;
7566
7567 err_exit:
7568 snd_card_free(card);
7569 return -ENODEV;
7570 }
7571
7572 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
7573 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
7574
7575 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7576 /* Whitelist volume level on all IBM by default */
7577 { .vendor = PCI_VENDOR_ID_IBM,
7578 .bios = TPACPI_MATCH_ANY,
7579 .ec = TPACPI_MATCH_ANY,
7580 .quirks = TPACPI_VOL_Q_LEVEL },
7581
7582 /* Lenovo models with volume control (needs confirmation) */
7583 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7584 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7585 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7586 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7587 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7588 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7589 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7590
7591 /* Whitelist mute-only on all Lenovo by default */
7592 { .vendor = PCI_VENDOR_ID_LENOVO,
7593 .bios = TPACPI_MATCH_ANY,
7594 .ec = TPACPI_MATCH_ANY,
7595 .quirks = TPACPI_VOL_Q_MUTEONLY }
7596 };
7597
volume_init(struct ibm_init_struct * iibm)7598 static int __init volume_init(struct ibm_init_struct *iibm)
7599 {
7600 unsigned long quirks;
7601 int rc;
7602
7603 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7604
7605 mutex_init(&volume_mutex);
7606
7607 /*
7608 * Check for module parameter bogosity, note that we
7609 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7610 * able to detect "unspecified"
7611 */
7612 if (volume_mode > TPACPI_VOL_MODE_MAX)
7613 return -EINVAL;
7614
7615 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7616 pr_err("UCMS step volume mode not implemented, please contact %s\n",
7617 TPACPI_MAIL);
7618 return -ENODEV;
7619 }
7620
7621 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7622 return -EINVAL;
7623
7624 /*
7625 * The ALSA mixer is our primary interface.
7626 * When disabled, don't install the subdriver at all
7627 */
7628 if (!alsa_enable) {
7629 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7630 "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
7631 return -ENODEV;
7632 }
7633
7634 quirks = tpacpi_check_quirks(volume_quirk_table,
7635 ARRAY_SIZE(volume_quirk_table));
7636
7637 switch (volume_capabilities) {
7638 case TPACPI_VOL_CAP_AUTO:
7639 if (quirks & TPACPI_VOL_Q_MUTEONLY)
7640 tp_features.mixer_no_level_control = 1;
7641 else if (quirks & TPACPI_VOL_Q_LEVEL)
7642 tp_features.mixer_no_level_control = 0;
7643 else
7644 return -ENODEV; /* no mixer */
7645 break;
7646 case TPACPI_VOL_CAP_VOLMUTE:
7647 tp_features.mixer_no_level_control = 0;
7648 break;
7649 case TPACPI_VOL_CAP_MUTEONLY:
7650 tp_features.mixer_no_level_control = 1;
7651 break;
7652 default:
7653 return -ENODEV;
7654 }
7655
7656 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7657 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7658 "using user-supplied volume_capabilities=%d\n",
7659 volume_capabilities);
7660
7661 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7662 volume_mode == TPACPI_VOL_MODE_MAX) {
7663 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7664
7665 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7666 "driver auto-selected volume_mode=%d\n",
7667 volume_mode);
7668 } else {
7669 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7670 "using user-supplied volume_mode=%d\n",
7671 volume_mode);
7672 }
7673
7674 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7675 "mute is supported, volume control is %s\n",
7676 str_supported(!tp_features.mixer_no_level_control));
7677
7678 if (software_mute_requested && volume_set_software_mute(true) == 0) {
7679 software_mute_active = true;
7680 } else {
7681 rc = volume_create_alsa_mixer();
7682 if (rc) {
7683 pr_err("Could not create the ALSA mixer interface\n");
7684 return rc;
7685 }
7686
7687 pr_info("Console audio control enabled, mode: %s\n",
7688 (volume_control_allowed) ?
7689 "override (read/write)" :
7690 "monitor (read only)");
7691 }
7692
7693 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7694 "registering volume hotkeys as change notification\n");
7695 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7696 | TP_ACPI_HKEY_VOLUP_MASK
7697 | TP_ACPI_HKEY_VOLDWN_MASK
7698 | TP_ACPI_HKEY_MUTE_MASK);
7699
7700 return 0;
7701 }
7702
volume_read(struct seq_file * m)7703 static int volume_read(struct seq_file *m)
7704 {
7705 u8 status;
7706
7707 if (volume_get_status(&status) < 0) {
7708 seq_printf(m, "level:\t\tunreadable\n");
7709 } else {
7710 if (tp_features.mixer_no_level_control)
7711 seq_printf(m, "level:\t\tunsupported\n");
7712 else
7713 seq_printf(m, "level:\t\t%d\n",
7714 status & TP_EC_AUDIO_LVL_MSK);
7715
7716 seq_printf(m, "mute:\t\t%s\n", str_on_off(status & BIT(TP_EC_AUDIO_MUTESW)));
7717
7718 if (volume_control_allowed) {
7719 seq_printf(m, "commands:\tunmute, mute\n");
7720 if (!tp_features.mixer_no_level_control) {
7721 seq_printf(m, "commands:\tup, down\n");
7722 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7723 TP_EC_VOLUME_MAX);
7724 }
7725 }
7726 }
7727
7728 return 0;
7729 }
7730
volume_write(char * buf)7731 static int volume_write(char *buf)
7732 {
7733 u8 s;
7734 u8 new_level, new_mute;
7735 int l;
7736 char *cmd;
7737 int rc;
7738
7739 /*
7740 * We do allow volume control at driver startup, so that the
7741 * user can set initial state through the volume=... parameter hack.
7742 */
7743 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7744 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7745 tp_warned.volume_ctrl_forbidden = 1;
7746 pr_notice("Console audio control in monitor mode, changes are not allowed\n");
7747 pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
7748 }
7749 return -EPERM;
7750 }
7751
7752 rc = volume_get_status(&s);
7753 if (rc < 0)
7754 return rc;
7755
7756 new_level = s & TP_EC_AUDIO_LVL_MSK;
7757 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7758
7759 while ((cmd = strsep(&buf, ","))) {
7760 if (!tp_features.mixer_no_level_control) {
7761 if (strstarts(cmd, "up")) {
7762 if (new_mute)
7763 new_mute = 0;
7764 else if (new_level < TP_EC_VOLUME_MAX)
7765 new_level++;
7766 continue;
7767 } else if (strstarts(cmd, "down")) {
7768 if (new_mute)
7769 new_mute = 0;
7770 else if (new_level > 0)
7771 new_level--;
7772 continue;
7773 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7774 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7775 new_level = l;
7776 continue;
7777 }
7778 }
7779 if (strstarts(cmd, "mute"))
7780 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7781 else if (strstarts(cmd, "unmute"))
7782 new_mute = 0;
7783 else
7784 return -EINVAL;
7785 }
7786
7787 if (tp_features.mixer_no_level_control) {
7788 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7789 new_mute ? "" : "un");
7790 rc = volume_set_mute(!!new_mute);
7791 } else {
7792 tpacpi_disclose_usertask("procfs volume",
7793 "%smute and set level to %d\n",
7794 new_mute ? "" : "un", new_level);
7795 rc = volume_set_status(new_mute | new_level);
7796 }
7797 volume_alsa_notify_change();
7798
7799 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7800 }
7801
7802 static struct ibm_struct volume_driver_data = {
7803 .name = "volume",
7804 .read = volume_read,
7805 .write = volume_write,
7806 .exit = volume_exit,
7807 .suspend = volume_suspend,
7808 .resume = volume_resume,
7809 .shutdown = volume_shutdown,
7810 };
7811
7812 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7813
7814 #define alsa_card NULL
7815
volume_alsa_notify_change(void)7816 static inline void volume_alsa_notify_change(void)
7817 {
7818 }
7819
volume_init(struct ibm_init_struct * iibm)7820 static int __init volume_init(struct ibm_init_struct *iibm)
7821 {
7822 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7823
7824 return -ENODEV;
7825 }
7826
7827 static struct ibm_struct volume_driver_data = {
7828 .name = "volume",
7829 };
7830
7831 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7832
7833 /*************************************************************************
7834 * Fan subdriver
7835 */
7836
7837 /*
7838 * FAN ACCESS MODES
7839 *
7840 * TPACPI_FAN_RD_ACPI_GFAN:
7841 * ACPI GFAN method: returns fan level
7842 *
7843 * see TPACPI_FAN_WR_ACPI_SFAN
7844 * EC 0x2f (HFSP) not available if GFAN exists
7845 *
7846 * TPACPI_FAN_WR_ACPI_SFAN:
7847 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7848 *
7849 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7850 * it for writing.
7851 *
7852 * TPACPI_FAN_WR_TPEC:
7853 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7854 * Supported on almost all ThinkPads
7855 *
7856 * Fan speed changes of any sort (including those caused by the
7857 * disengaged mode) are usually done slowly by the firmware as the
7858 * maximum amount of fan duty cycle change per second seems to be
7859 * limited.
7860 *
7861 * Reading is not available if GFAN exists.
7862 * Writing is not available if SFAN exists.
7863 *
7864 * Bits
7865 * 7 automatic mode engaged;
7866 * (default operation mode of the ThinkPad)
7867 * fan level is ignored in this mode.
7868 * 6 full speed mode (takes precedence over bit 7);
7869 * not available on all thinkpads. May disable
7870 * the tachometer while the fan controller ramps up
7871 * the speed (which can take up to a few *minutes*).
7872 * Speeds up fan to 100% duty-cycle, which is far above
7873 * the standard RPM levels. It is not impossible that
7874 * it could cause hardware damage.
7875 * 5-3 unused in some models. Extra bits for fan level
7876 * in others, but still useless as all values above
7877 * 7 map to the same speed as level 7 in these models.
7878 * 2-0 fan level (0..7 usually)
7879 * 0x00 = stop
7880 * 0x07 = max (set when temperatures critical)
7881 * Some ThinkPads may have other levels, see
7882 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7883 *
7884 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7885 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7886 * does so, its initial value is meaningless (0x07).
7887 *
7888 * For firmware bugs, refer to:
7889 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7890 *
7891 * ----
7892 *
7893 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7894 * Main fan tachometer reading (in RPM)
7895 *
7896 * This register is present on all ThinkPads with a new-style EC, and
7897 * it is known not to be present on the A21m/e, and T22, as there is
7898 * something else in offset 0x84 according to the ACPI DSDT. Other
7899 * ThinkPads from this same time period (and earlier) probably lack the
7900 * tachometer as well.
7901 *
7902 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7903 * was never fixed by IBM to report the EC firmware version string
7904 * probably support the tachometer (like the early X models), so
7905 * detecting it is quite hard. We need more data to know for sure.
7906 *
7907 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7908 * might result.
7909 *
7910 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7911 * mode.
7912 *
7913 * For firmware bugs, refer to:
7914 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7915 *
7916 * ----
7917 *
7918 * ThinkPad EC register 0x31 bit 0 (only on select models)
7919 *
7920 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7921 * show the speed of the main fan. When bit 0 of EC register 0x31
7922 * is one, the tachometer registers show the speed of the auxiliary
7923 * fan.
7924 *
7925 * Fan control seems to affect both fans, regardless of the state
7926 * of this bit.
7927 *
7928 * So far, only the firmware for the X60/X61 non-tablet versions
7929 * seem to support this (firmware TP-7M).
7930 *
7931 * TPACPI_FAN_WR_ACPI_FANS:
7932 * ThinkPad X31, X40, X41. Not available in the X60.
7933 *
7934 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7935 * high speed. ACPI DSDT seems to map these three speeds to levels
7936 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7937 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7938 *
7939 * The speeds are stored on handles
7940 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7941 *
7942 * There are three default speed sets, accessible as handles:
7943 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7944 *
7945 * ACPI DSDT switches which set is in use depending on various
7946 * factors.
7947 *
7948 * TPACPI_FAN_WR_TPEC is also available and should be used to
7949 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7950 * but the ACPI tables just mention level 7.
7951 *
7952 * TPACPI_FAN_RD_TPEC_NS:
7953 * This mode is used for a few ThinkPads (L13 Yoga Gen2, X13 Yoga Gen2 etc.)
7954 * that are using non-standard EC locations for reporting fan speeds.
7955 * Currently these platforms only provide fan rpm reporting.
7956 *
7957 */
7958
7959 #define FAN_RPM_CAL_CONST 491520 /* FAN RPM calculation offset for some non-standard ECFW */
7960
7961 #define FAN_NS_CTRL_STATUS BIT(2) /* Bit which determines control is enabled or not */
7962 #define FAN_NS_CTRL BIT(4) /* Bit which determines control is by host or EC */
7963
7964 enum { /* Fan control constants */
7965 fan_status_offset = 0x2f, /* EC register 0x2f */
7966 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7967 * 0x84 must be read before 0x85 */
7968 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7969 bit 0 selects which fan is active */
7970
7971 fan_status_offset_ns = 0x93, /* Special status/control offset for non-standard EC Fan1 */
7972 fan2_status_offset_ns = 0x96, /* Special status/control offset for non-standard EC Fan2 */
7973 fan_rpm_status_ns = 0x95, /* Special offset for Fan1 RPM status for non-standard EC */
7974 fan2_rpm_status_ns = 0x98, /* Special offset for Fan2 RPM status for non-standard EC */
7975
7976 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7977 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7978
7979 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7980 };
7981
7982 enum fan_status_access_mode {
7983 TPACPI_FAN_NONE = 0, /* No fan status or control */
7984 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7985 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7986 TPACPI_FAN_RD_TPEC_NS, /* Use non-standard ACPI EC regs (eg: L13 Yoga gen2 etc.) */
7987 };
7988
7989 enum fan_control_access_mode {
7990 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7991 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7992 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7993 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7994 };
7995
7996 enum fan_control_commands {
7997 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7998 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7999 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
8000 * and also watchdog cmd */
8001 };
8002
8003 static bool fan_control_allowed;
8004
8005 static enum fan_status_access_mode fan_status_access_mode;
8006 static enum fan_control_access_mode fan_control_access_mode;
8007 static enum fan_control_commands fan_control_commands;
8008
8009 static u8 fan_control_initial_status;
8010 static u8 fan_control_desired_level;
8011 static u8 fan_control_resume_level;
8012 static int fan_watchdog_maxinterval;
8013
8014 static bool fan_with_ns_addr;
8015
8016 static struct mutex fan_mutex;
8017
8018 static void fan_watchdog_fire(struct work_struct *ignored);
8019 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
8020
8021 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
8022 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
8023 "\\FSPD", /* 600e/x, 770e, 770x */
8024 ); /* all others */
8025 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
8026 "JFNS", /* 770x-JL */
8027 ); /* all others */
8028
8029 /*
8030 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
8031 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
8032 * be in auto mode (0x80).
8033 *
8034 * This is corrected by any write to HFSP either by the driver, or
8035 * by the firmware.
8036 *
8037 * We assume 0x07 really means auto mode while this quirk is active,
8038 * as this is far more likely than the ThinkPad being in level 7,
8039 * which is only used by the firmware during thermal emergencies.
8040 *
8041 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
8042 * TP-70 (T43, R52), which are known to be buggy.
8043 */
8044
fan_quirk1_setup(void)8045 static void fan_quirk1_setup(void)
8046 {
8047 if (fan_control_initial_status == 0x07) {
8048 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
8049 tp_features.fan_ctrl_status_undef = 1;
8050 }
8051 }
8052
fan_quirk1_handle(u8 * fan_status)8053 static void fan_quirk1_handle(u8 *fan_status)
8054 {
8055 if (unlikely(tp_features.fan_ctrl_status_undef)) {
8056 if (*fan_status != fan_control_initial_status) {
8057 /* something changed the HFSP regisnter since
8058 * driver init time, so it is not undefined
8059 * anymore */
8060 tp_features.fan_ctrl_status_undef = 0;
8061 } else {
8062 /* Return most likely status. In fact, it
8063 * might be the only possible status */
8064 *fan_status = TP_EC_FAN_AUTO;
8065 }
8066 }
8067 }
8068
8069 /* Select main fan on X60/X61, NOOP on others */
fan_select_fan1(void)8070 static bool fan_select_fan1(void)
8071 {
8072 if (tp_features.second_fan) {
8073 u8 val;
8074
8075 if (ec_read(fan_select_offset, &val) < 0)
8076 return false;
8077 val &= 0xFEU;
8078 if (ec_write(fan_select_offset, val) < 0)
8079 return false;
8080 }
8081 return true;
8082 }
8083
8084 /* Select secondary fan on X60/X61 */
fan_select_fan2(void)8085 static bool fan_select_fan2(void)
8086 {
8087 u8 val;
8088
8089 if (!tp_features.second_fan)
8090 return false;
8091
8092 if (ec_read(fan_select_offset, &val) < 0)
8093 return false;
8094 val |= 0x01U;
8095 if (ec_write(fan_select_offset, val) < 0)
8096 return false;
8097
8098 return true;
8099 }
8100
fan_update_desired_level(u8 status)8101 static void fan_update_desired_level(u8 status)
8102 {
8103 lockdep_assert_held(&fan_mutex);
8104
8105 if ((status &
8106 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8107 if (status > 7)
8108 fan_control_desired_level = 7;
8109 else
8110 fan_control_desired_level = status;
8111 }
8112 }
8113
fan_get_status(u8 * status)8114 static int fan_get_status(u8 *status)
8115 {
8116 u8 s;
8117
8118 /* TODO:
8119 * Add TPACPI_FAN_RD_ACPI_FANS ? */
8120
8121 switch (fan_status_access_mode) {
8122 case TPACPI_FAN_RD_ACPI_GFAN: {
8123 /* 570, 600e/x, 770e, 770x */
8124 int res;
8125
8126 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
8127 return -EIO;
8128
8129 if (likely(status))
8130 *status = res & 0x07;
8131
8132 break;
8133 }
8134 case TPACPI_FAN_RD_TPEC:
8135 /* all except 570, 600e/x, 770e, 770x */
8136 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
8137 return -EIO;
8138
8139 if (likely(status)) {
8140 *status = s;
8141 fan_quirk1_handle(status);
8142 }
8143
8144 break;
8145 case TPACPI_FAN_RD_TPEC_NS:
8146 /* Default mode is AUTO which means controlled by EC */
8147 if (!acpi_ec_read(fan_status_offset_ns, &s))
8148 return -EIO;
8149
8150 if (status)
8151 *status = s;
8152
8153 break;
8154
8155 default:
8156 return -ENXIO;
8157 }
8158
8159 return 0;
8160 }
8161
fan_get_status_safe(u8 * status)8162 static int fan_get_status_safe(u8 *status)
8163 {
8164 int rc;
8165 u8 s;
8166
8167 if (mutex_lock_killable(&fan_mutex))
8168 return -ERESTARTSYS;
8169 rc = fan_get_status(&s);
8170 /* NS EC doesn't have register with level settings */
8171 if (!rc && !fan_with_ns_addr)
8172 fan_update_desired_level(s);
8173 mutex_unlock(&fan_mutex);
8174
8175 if (rc)
8176 return rc;
8177 if (status)
8178 *status = s;
8179
8180 return 0;
8181 }
8182
fan_get_speed(unsigned int * speed)8183 static int fan_get_speed(unsigned int *speed)
8184 {
8185 u8 hi, lo;
8186
8187 switch (fan_status_access_mode) {
8188 case TPACPI_FAN_RD_TPEC:
8189 /* all except 570, 600e/x, 770e, 770x */
8190 if (unlikely(!fan_select_fan1()))
8191 return -EIO;
8192 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
8193 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
8194 return -EIO;
8195
8196 if (likely(speed))
8197 *speed = (hi << 8) | lo;
8198 break;
8199 case TPACPI_FAN_RD_TPEC_NS:
8200 if (!acpi_ec_read(fan_rpm_status_ns, &lo))
8201 return -EIO;
8202
8203 if (speed)
8204 *speed = lo ? FAN_RPM_CAL_CONST / lo : 0;
8205 break;
8206
8207 default:
8208 return -ENXIO;
8209 }
8210
8211 return 0;
8212 }
8213
fan2_get_speed(unsigned int * speed)8214 static int fan2_get_speed(unsigned int *speed)
8215 {
8216 u8 hi, lo, status;
8217 bool rc;
8218
8219 switch (fan_status_access_mode) {
8220 case TPACPI_FAN_RD_TPEC:
8221 /* all except 570, 600e/x, 770e, 770x */
8222 if (unlikely(!fan_select_fan2()))
8223 return -EIO;
8224 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8225 !acpi_ec_read(fan_rpm_offset + 1, &hi);
8226 fan_select_fan1(); /* play it safe */
8227 if (rc)
8228 return -EIO;
8229
8230 if (likely(speed))
8231 *speed = (hi << 8) | lo;
8232 break;
8233
8234 case TPACPI_FAN_RD_TPEC_NS:
8235 rc = !acpi_ec_read(fan2_status_offset_ns, &status);
8236 if (rc)
8237 return -EIO;
8238 if (!(status & FAN_NS_CTRL_STATUS)) {
8239 pr_info("secondary fan control not supported\n");
8240 return -EIO;
8241 }
8242 rc = !acpi_ec_read(fan2_rpm_status_ns, &lo);
8243 if (rc)
8244 return -EIO;
8245 if (speed)
8246 *speed = lo ? FAN_RPM_CAL_CONST / lo : 0;
8247 break;
8248
8249 default:
8250 return -ENXIO;
8251 }
8252
8253 return 0;
8254 }
8255
fan_set_level(int level)8256 static int fan_set_level(int level)
8257 {
8258 if (!fan_control_allowed)
8259 return -EPERM;
8260
8261 switch (fan_control_access_mode) {
8262 case TPACPI_FAN_WR_ACPI_SFAN:
8263 if ((level < 0) || (level > 7))
8264 return -EINVAL;
8265
8266 if (tp_features.second_fan_ctl) {
8267 if (!fan_select_fan2() ||
8268 !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) {
8269 pr_warn("Couldn't set 2nd fan level, disabling support\n");
8270 tp_features.second_fan_ctl = 0;
8271 }
8272 fan_select_fan1();
8273 }
8274 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8275 return -EIO;
8276 break;
8277
8278 case TPACPI_FAN_WR_ACPI_FANS:
8279 case TPACPI_FAN_WR_TPEC:
8280 if (!(level & TP_EC_FAN_AUTO) &&
8281 !(level & TP_EC_FAN_FULLSPEED) &&
8282 ((level < 0) || (level > 7)))
8283 return -EINVAL;
8284
8285 /* safety net should the EC not support AUTO
8286 * or FULLSPEED mode bits and just ignore them */
8287 if (level & TP_EC_FAN_FULLSPEED)
8288 level |= 7; /* safety min speed 7 */
8289 else if (level & TP_EC_FAN_AUTO)
8290 level |= 4; /* safety min speed 4 */
8291
8292 if (tp_features.second_fan_ctl) {
8293 if (!fan_select_fan2() ||
8294 !acpi_ec_write(fan_status_offset, level)) {
8295 pr_warn("Couldn't set 2nd fan level, disabling support\n");
8296 tp_features.second_fan_ctl = 0;
8297 }
8298 fan_select_fan1();
8299
8300 }
8301 if (!acpi_ec_write(fan_status_offset, level))
8302 return -EIO;
8303 else
8304 tp_features.fan_ctrl_status_undef = 0;
8305 break;
8306
8307 default:
8308 return -ENXIO;
8309 }
8310
8311 vdbg_printk(TPACPI_DBG_FAN,
8312 "fan control: set fan control register to 0x%02x\n", level);
8313 return 0;
8314 }
8315
fan_set_level_safe(int level)8316 static int fan_set_level_safe(int level)
8317 {
8318 int rc;
8319
8320 if (!fan_control_allowed)
8321 return -EPERM;
8322
8323 if (mutex_lock_killable(&fan_mutex))
8324 return -ERESTARTSYS;
8325
8326 if (level == TPACPI_FAN_LAST_LEVEL)
8327 level = fan_control_desired_level;
8328
8329 rc = fan_set_level(level);
8330 if (!rc)
8331 fan_update_desired_level(level);
8332
8333 mutex_unlock(&fan_mutex);
8334 return rc;
8335 }
8336
fan_set_enable(void)8337 static int fan_set_enable(void)
8338 {
8339 u8 s;
8340 int rc;
8341
8342 if (!fan_control_allowed)
8343 return -EPERM;
8344
8345 if (mutex_lock_killable(&fan_mutex))
8346 return -ERESTARTSYS;
8347
8348 switch (fan_control_access_mode) {
8349 case TPACPI_FAN_WR_ACPI_FANS:
8350 case TPACPI_FAN_WR_TPEC:
8351 rc = fan_get_status(&s);
8352 if (rc)
8353 break;
8354
8355 /* Don't go out of emergency fan mode */
8356 if (s != 7) {
8357 s &= 0x07;
8358 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8359 }
8360
8361 if (!acpi_ec_write(fan_status_offset, s))
8362 rc = -EIO;
8363 else {
8364 tp_features.fan_ctrl_status_undef = 0;
8365 rc = 0;
8366 }
8367 break;
8368
8369 case TPACPI_FAN_WR_ACPI_SFAN:
8370 rc = fan_get_status(&s);
8371 if (rc)
8372 break;
8373
8374 s &= 0x07;
8375
8376 /* Set fan to at least level 4 */
8377 s |= 4;
8378
8379 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8380 rc = -EIO;
8381 else
8382 rc = 0;
8383 break;
8384
8385 default:
8386 rc = -ENXIO;
8387 }
8388
8389 mutex_unlock(&fan_mutex);
8390
8391 if (!rc)
8392 vdbg_printk(TPACPI_DBG_FAN,
8393 "fan control: set fan control register to 0x%02x\n",
8394 s);
8395 return rc;
8396 }
8397
fan_set_disable(void)8398 static int fan_set_disable(void)
8399 {
8400 int rc;
8401
8402 if (!fan_control_allowed)
8403 return -EPERM;
8404
8405 if (mutex_lock_killable(&fan_mutex))
8406 return -ERESTARTSYS;
8407
8408 rc = 0;
8409 switch (fan_control_access_mode) {
8410 case TPACPI_FAN_WR_ACPI_FANS:
8411 case TPACPI_FAN_WR_TPEC:
8412 if (!acpi_ec_write(fan_status_offset, 0x00))
8413 rc = -EIO;
8414 else {
8415 fan_control_desired_level = 0;
8416 tp_features.fan_ctrl_status_undef = 0;
8417 }
8418 break;
8419
8420 case TPACPI_FAN_WR_ACPI_SFAN:
8421 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8422 rc = -EIO;
8423 else
8424 fan_control_desired_level = 0;
8425 break;
8426
8427 default:
8428 rc = -ENXIO;
8429 }
8430
8431 if (!rc)
8432 vdbg_printk(TPACPI_DBG_FAN,
8433 "fan control: set fan control register to 0\n");
8434
8435 mutex_unlock(&fan_mutex);
8436 return rc;
8437 }
8438
fan_set_speed(int speed)8439 static int fan_set_speed(int speed)
8440 {
8441 int rc;
8442
8443 if (!fan_control_allowed)
8444 return -EPERM;
8445
8446 if (mutex_lock_killable(&fan_mutex))
8447 return -ERESTARTSYS;
8448
8449 rc = 0;
8450 switch (fan_control_access_mode) {
8451 case TPACPI_FAN_WR_ACPI_FANS:
8452 if (speed >= 0 && speed <= 65535) {
8453 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8454 speed, speed, speed))
8455 rc = -EIO;
8456 } else
8457 rc = -EINVAL;
8458 break;
8459
8460 default:
8461 rc = -ENXIO;
8462 }
8463
8464 mutex_unlock(&fan_mutex);
8465 return rc;
8466 }
8467
fan_watchdog_reset(void)8468 static void fan_watchdog_reset(void)
8469 {
8470 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8471 return;
8472
8473 if (fan_watchdog_maxinterval > 0 &&
8474 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8475 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8476 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8477 else
8478 cancel_delayed_work(&fan_watchdog_task);
8479 }
8480
fan_watchdog_fire(struct work_struct * ignored)8481 static void fan_watchdog_fire(struct work_struct *ignored)
8482 {
8483 int rc;
8484
8485 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8486 return;
8487
8488 pr_notice("fan watchdog: enabling fan\n");
8489 rc = fan_set_enable();
8490 if (rc < 0) {
8491 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
8492 rc);
8493 /* reschedule for later */
8494 fan_watchdog_reset();
8495 }
8496 }
8497
8498 /*
8499 * SYSFS fan layout: hwmon compatible (device)
8500 *
8501 * pwm*_enable:
8502 * 0: "disengaged" mode
8503 * 1: manual mode
8504 * 2: native EC "auto" mode (recommended, hardware default)
8505 *
8506 * pwm*: set speed in manual mode, ignored otherwise.
8507 * 0 is level 0; 255 is level 7. Intermediate points done with linear
8508 * interpolation.
8509 *
8510 * fan*_input: tachometer reading, RPM
8511 *
8512 *
8513 * SYSFS fan layout: extensions
8514 *
8515 * fan_watchdog (driver):
8516 * fan watchdog interval in seconds, 0 disables (default), max 120
8517 */
8518
8519 /* sysfs fan pwm1_enable ----------------------------------------------- */
fan_pwm1_enable_show(struct device * dev,struct device_attribute * attr,char * buf)8520 static ssize_t fan_pwm1_enable_show(struct device *dev,
8521 struct device_attribute *attr,
8522 char *buf)
8523 {
8524 int res, mode;
8525 u8 status;
8526
8527 res = fan_get_status_safe(&status);
8528 if (res)
8529 return res;
8530
8531 if (status & TP_EC_FAN_FULLSPEED) {
8532 mode = 0;
8533 } else if (status & TP_EC_FAN_AUTO) {
8534 mode = 2;
8535 } else
8536 mode = 1;
8537
8538 return sysfs_emit(buf, "%d\n", mode);
8539 }
8540
fan_pwm1_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)8541 static ssize_t fan_pwm1_enable_store(struct device *dev,
8542 struct device_attribute *attr,
8543 const char *buf, size_t count)
8544 {
8545 unsigned long t;
8546 int res, level;
8547
8548 if (parse_strtoul(buf, 2, &t))
8549 return -EINVAL;
8550
8551 tpacpi_disclose_usertask("hwmon pwm1_enable",
8552 "set fan mode to %lu\n", t);
8553
8554 switch (t) {
8555 case 0:
8556 level = TP_EC_FAN_FULLSPEED;
8557 break;
8558 case 1:
8559 level = TPACPI_FAN_LAST_LEVEL;
8560 break;
8561 case 2:
8562 level = TP_EC_FAN_AUTO;
8563 break;
8564 case 3:
8565 /* reserved for software-controlled auto mode */
8566 return -ENOSYS;
8567 default:
8568 return -EINVAL;
8569 }
8570
8571 res = fan_set_level_safe(level);
8572 if (res == -ENXIO)
8573 return -EINVAL;
8574 else if (res < 0)
8575 return res;
8576
8577 fan_watchdog_reset();
8578
8579 return count;
8580 }
8581
8582 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8583 fan_pwm1_enable_show, fan_pwm1_enable_store);
8584
8585 /* sysfs fan pwm1 ------------------------------------------------------ */
fan_pwm1_show(struct device * dev,struct device_attribute * attr,char * buf)8586 static ssize_t fan_pwm1_show(struct device *dev,
8587 struct device_attribute *attr,
8588 char *buf)
8589 {
8590 int res;
8591 u8 status;
8592
8593 res = fan_get_status_safe(&status);
8594 if (res)
8595 return res;
8596
8597 if ((status &
8598 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8599 status = fan_control_desired_level;
8600
8601 if (status > 7)
8602 status = 7;
8603
8604 return sysfs_emit(buf, "%u\n", (status * 255) / 7);
8605 }
8606
fan_pwm1_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)8607 static ssize_t fan_pwm1_store(struct device *dev,
8608 struct device_attribute *attr,
8609 const char *buf, size_t count)
8610 {
8611 unsigned long s;
8612 int rc;
8613 u8 status, newlevel;
8614
8615 if (parse_strtoul(buf, 255, &s))
8616 return -EINVAL;
8617
8618 tpacpi_disclose_usertask("hwmon pwm1",
8619 "set fan speed to %lu\n", s);
8620
8621 /* scale down from 0-255 to 0-7 */
8622 newlevel = (s >> 5) & 0x07;
8623
8624 if (mutex_lock_killable(&fan_mutex))
8625 return -ERESTARTSYS;
8626
8627 rc = fan_get_status(&status);
8628 if (!rc && (status &
8629 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8630 rc = fan_set_level(newlevel);
8631 if (rc == -ENXIO)
8632 rc = -EINVAL;
8633 else if (!rc) {
8634 fan_update_desired_level(newlevel);
8635 fan_watchdog_reset();
8636 }
8637 }
8638
8639 mutex_unlock(&fan_mutex);
8640 return (rc) ? rc : count;
8641 }
8642
8643 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8644
8645 /* sysfs fan fan1_input ------------------------------------------------ */
fan_fan1_input_show(struct device * dev,struct device_attribute * attr,char * buf)8646 static ssize_t fan_fan1_input_show(struct device *dev,
8647 struct device_attribute *attr,
8648 char *buf)
8649 {
8650 int res;
8651 unsigned int speed;
8652
8653 res = fan_get_speed(&speed);
8654 if (res < 0)
8655 return res;
8656
8657 return sysfs_emit(buf, "%u\n", speed);
8658 }
8659
8660 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8661
8662 /* sysfs fan fan2_input ------------------------------------------------ */
fan_fan2_input_show(struct device * dev,struct device_attribute * attr,char * buf)8663 static ssize_t fan_fan2_input_show(struct device *dev,
8664 struct device_attribute *attr,
8665 char *buf)
8666 {
8667 int res;
8668 unsigned int speed;
8669
8670 res = fan2_get_speed(&speed);
8671 if (res < 0)
8672 return res;
8673
8674 return sysfs_emit(buf, "%u\n", speed);
8675 }
8676
8677 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8678
8679 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
fan_watchdog_show(struct device_driver * drv,char * buf)8680 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
8681 {
8682 return sysfs_emit(buf, "%u\n", fan_watchdog_maxinterval);
8683 }
8684
fan_watchdog_store(struct device_driver * drv,const char * buf,size_t count)8685 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
8686 size_t count)
8687 {
8688 unsigned long t;
8689
8690 if (parse_strtoul(buf, 120, &t))
8691 return -EINVAL;
8692
8693 if (!fan_control_allowed)
8694 return -EPERM;
8695
8696 fan_watchdog_maxinterval = t;
8697 fan_watchdog_reset();
8698
8699 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8700
8701 return count;
8702 }
8703 static DRIVER_ATTR_RW(fan_watchdog);
8704
8705 /* --------------------------------------------------------------------- */
8706
8707 static struct attribute *fan_attributes[] = {
8708 &dev_attr_pwm1_enable.attr,
8709 &dev_attr_pwm1.attr,
8710 &dev_attr_fan1_input.attr,
8711 &dev_attr_fan2_input.attr,
8712 NULL
8713 };
8714
fan_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)8715 static umode_t fan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
8716 int n)
8717 {
8718 if (fan_status_access_mode == TPACPI_FAN_NONE &&
8719 fan_control_access_mode == TPACPI_FAN_WR_NONE)
8720 return 0;
8721
8722 if (attr == &dev_attr_fan2_input.attr) {
8723 if (!tp_features.second_fan)
8724 return 0;
8725 }
8726
8727 return attr->mode;
8728 }
8729
8730 static const struct attribute_group fan_attr_group = {
8731 .is_visible = fan_attr_is_visible,
8732 .attrs = fan_attributes,
8733 };
8734
8735 static struct attribute *fan_driver_attributes[] = {
8736 &driver_attr_fan_watchdog.attr,
8737 NULL
8738 };
8739
8740 static const struct attribute_group fan_driver_attr_group = {
8741 .is_visible = fan_attr_is_visible,
8742 .attrs = fan_driver_attributes,
8743 };
8744
8745 #define TPACPI_FAN_Q1 0x0001 /* Uninitialized HFSP */
8746 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
8747 #define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */
8748 #define TPACPI_FAN_NOFAN 0x0008 /* no fan available */
8749 #define TPACPI_FAN_NS 0x0010 /* For EC with non-Standard register addresses */
8750
8751 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8752 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
8753 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1),
8754 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
8755 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
8756 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN),
8757 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN),
8758 TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL), /* P70 */
8759 TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL), /* P50 */
8760 TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL), /* P71 */
8761 TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL), /* P51 */
8762 TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL), /* P52 / P72 */
8763 TPACPI_Q_LNV3('N', '2', 'N', TPACPI_FAN_2CTL), /* P53 / P73 */
8764 TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (1st gen) */
8765 TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (2nd gen) */
8766 TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL), /* P15 (1st gen) / P15v (1st gen) */
8767 TPACPI_Q_LNV3('N', '3', '7', TPACPI_FAN_2CTL), /* T15g (2nd gen) */
8768 TPACPI_Q_LNV3('R', '1', 'F', TPACPI_FAN_NS), /* L13 Yoga Gen 2 */
8769 TPACPI_Q_LNV3('N', '2', 'U', TPACPI_FAN_NS), /* X13 Yoga Gen 2*/
8770 TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN), /* X1 Tablet (2nd gen) */
8771 };
8772
fan_init(struct ibm_init_struct * iibm)8773 static int __init fan_init(struct ibm_init_struct *iibm)
8774 {
8775 unsigned long quirks;
8776
8777 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8778 "initializing fan subdriver\n");
8779
8780 mutex_init(&fan_mutex);
8781 fan_status_access_mode = TPACPI_FAN_NONE;
8782 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8783 fan_control_commands = 0;
8784 fan_watchdog_maxinterval = 0;
8785 tp_features.fan_ctrl_status_undef = 0;
8786 tp_features.second_fan = 0;
8787 tp_features.second_fan_ctl = 0;
8788 fan_control_desired_level = 7;
8789
8790 if (tpacpi_is_ibm()) {
8791 TPACPI_ACPIHANDLE_INIT(fans);
8792 TPACPI_ACPIHANDLE_INIT(gfan);
8793 TPACPI_ACPIHANDLE_INIT(sfan);
8794 }
8795
8796 quirks = tpacpi_check_quirks(fan_quirk_table,
8797 ARRAY_SIZE(fan_quirk_table));
8798
8799 if (quirks & TPACPI_FAN_NOFAN) {
8800 pr_info("No integrated ThinkPad fan available\n");
8801 return -ENODEV;
8802 }
8803
8804 if (quirks & TPACPI_FAN_NS) {
8805 pr_info("ECFW with non-standard fan reg control found\n");
8806 fan_with_ns_addr = 1;
8807 /* Fan ctrl support from host is undefined for now */
8808 tp_features.fan_ctrl_status_undef = 1;
8809 }
8810
8811 if (gfan_handle) {
8812 /* 570, 600e/x, 770e, 770x */
8813 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8814 } else {
8815 /* all other ThinkPads: note that even old-style
8816 * ThinkPad ECs supports the fan control register */
8817 if (fan_with_ns_addr ||
8818 likely(acpi_ec_read(fan_status_offset, &fan_control_initial_status))) {
8819 int res;
8820 unsigned int speed;
8821
8822 fan_status_access_mode = fan_with_ns_addr ?
8823 TPACPI_FAN_RD_TPEC_NS : TPACPI_FAN_RD_TPEC;
8824
8825 if (quirks & TPACPI_FAN_Q1)
8826 fan_quirk1_setup();
8827 /* Try and probe the 2nd fan */
8828 tp_features.second_fan = 1; /* needed for get_speed to work */
8829 res = fan2_get_speed(&speed);
8830 if (res >= 0 && speed != FAN_NOT_PRESENT) {
8831 /* It responded - so let's assume it's there */
8832 tp_features.second_fan = 1;
8833 /* fan control not currently available for ns ECFW */
8834 tp_features.second_fan_ctl = !fan_with_ns_addr;
8835 pr_info("secondary fan control detected & enabled\n");
8836 } else {
8837 /* Fan not auto-detected */
8838 tp_features.second_fan = 0;
8839 if (quirks & TPACPI_FAN_2FAN) {
8840 tp_features.second_fan = 1;
8841 pr_info("secondary fan support enabled\n");
8842 }
8843 if (quirks & TPACPI_FAN_2CTL) {
8844 tp_features.second_fan = 1;
8845 tp_features.second_fan_ctl = 1;
8846 pr_info("secondary fan control enabled\n");
8847 }
8848 }
8849 } else {
8850 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
8851 return -ENODEV;
8852 }
8853 }
8854
8855 if (sfan_handle) {
8856 /* 570, 770x-JL */
8857 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8858 fan_control_commands |=
8859 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8860 } else {
8861 if (!gfan_handle) {
8862 /* gfan without sfan means no fan control */
8863 /* all other models implement TP EC 0x2f control */
8864
8865 if (fans_handle) {
8866 /* X31, X40, X41 */
8867 fan_control_access_mode =
8868 TPACPI_FAN_WR_ACPI_FANS;
8869 fan_control_commands |=
8870 TPACPI_FAN_CMD_SPEED |
8871 TPACPI_FAN_CMD_LEVEL |
8872 TPACPI_FAN_CMD_ENABLE;
8873 } else {
8874 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8875 fan_control_commands |=
8876 TPACPI_FAN_CMD_LEVEL |
8877 TPACPI_FAN_CMD_ENABLE;
8878 }
8879 }
8880 }
8881
8882 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8883 "fan is %s, modes %d, %d\n",
8884 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8885 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8886 fan_status_access_mode, fan_control_access_mode);
8887
8888 /* fan control master switch */
8889 if (!fan_control_allowed) {
8890 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8891 fan_control_commands = 0;
8892 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8893 "fan control features disabled by parameter\n");
8894 }
8895
8896 /* update fan_control_desired_level */
8897 if (fan_status_access_mode != TPACPI_FAN_NONE)
8898 fan_get_status_safe(NULL);
8899
8900 if (fan_status_access_mode == TPACPI_FAN_NONE &&
8901 fan_control_access_mode == TPACPI_FAN_WR_NONE)
8902 return -ENODEV;
8903
8904 return 0;
8905 }
8906
fan_exit(void)8907 static void fan_exit(void)
8908 {
8909 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8910 "cancelling any pending fan watchdog tasks\n");
8911
8912 cancel_delayed_work(&fan_watchdog_task);
8913 flush_workqueue(tpacpi_wq);
8914 }
8915
fan_suspend(void)8916 static void fan_suspend(void)
8917 {
8918 int rc;
8919
8920 if (!fan_control_allowed)
8921 return;
8922
8923 /* Store fan status in cache */
8924 fan_control_resume_level = 0;
8925 rc = fan_get_status_safe(&fan_control_resume_level);
8926 if (rc)
8927 pr_notice("failed to read fan level for later restore during resume: %d\n",
8928 rc);
8929
8930 /* if it is undefined, don't attempt to restore it.
8931 * KEEP THIS LAST */
8932 if (tp_features.fan_ctrl_status_undef)
8933 fan_control_resume_level = 0;
8934 }
8935
fan_resume(void)8936 static void fan_resume(void)
8937 {
8938 u8 current_level = 7;
8939 bool do_set = false;
8940 int rc;
8941
8942 /* DSDT *always* updates status on resume */
8943 tp_features.fan_ctrl_status_undef = 0;
8944
8945 if (!fan_control_allowed ||
8946 !fan_control_resume_level ||
8947 fan_get_status_safe(¤t_level))
8948 return;
8949
8950 switch (fan_control_access_mode) {
8951 case TPACPI_FAN_WR_ACPI_SFAN:
8952 /* never decrease fan level */
8953 do_set = (fan_control_resume_level > current_level);
8954 break;
8955 case TPACPI_FAN_WR_ACPI_FANS:
8956 case TPACPI_FAN_WR_TPEC:
8957 /* never decrease fan level, scale is:
8958 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8959 *
8960 * We expect the firmware to set either 7 or AUTO, but we
8961 * handle FULLSPEED out of paranoia.
8962 *
8963 * So, we can safely only restore FULLSPEED or 7, anything
8964 * else could slow the fan. Restoring AUTO is useless, at
8965 * best that's exactly what the DSDT already set (it is the
8966 * slower it uses).
8967 *
8968 * Always keep in mind that the DSDT *will* have set the
8969 * fans to what the vendor supposes is the best level. We
8970 * muck with it only to speed the fan up.
8971 */
8972 if (fan_control_resume_level != 7 &&
8973 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8974 return;
8975 else
8976 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8977 (current_level != fan_control_resume_level);
8978 break;
8979 default:
8980 return;
8981 }
8982 if (do_set) {
8983 pr_notice("restoring fan level to 0x%02x\n",
8984 fan_control_resume_level);
8985 rc = fan_set_level_safe(fan_control_resume_level);
8986 if (rc < 0)
8987 pr_notice("failed to restore fan level: %d\n", rc);
8988 }
8989 }
8990
fan_read(struct seq_file * m)8991 static int fan_read(struct seq_file *m)
8992 {
8993 int rc;
8994 u8 status;
8995 unsigned int speed = 0;
8996
8997 switch (fan_status_access_mode) {
8998 case TPACPI_FAN_RD_ACPI_GFAN:
8999 /* 570, 600e/x, 770e, 770x */
9000 rc = fan_get_status_safe(&status);
9001 if (rc)
9002 return rc;
9003
9004 seq_printf(m, "status:\t\t%s\n"
9005 "level:\t\t%d\n",
9006 str_enabled_disabled(status), status);
9007 break;
9008
9009 case TPACPI_FAN_RD_TPEC_NS:
9010 case TPACPI_FAN_RD_TPEC:
9011 /* all except 570, 600e/x, 770e, 770x */
9012 rc = fan_get_status_safe(&status);
9013 if (rc)
9014 return rc;
9015
9016 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status));
9017
9018 rc = fan_get_speed(&speed);
9019 if (rc < 0)
9020 return rc;
9021
9022 seq_printf(m, "speed:\t\t%d\n", speed);
9023
9024 if (fan_status_access_mode == TPACPI_FAN_RD_TPEC_NS) {
9025 /*
9026 * No full speed bit in NS EC
9027 * EC Auto mode is set by default.
9028 * No other levels settings available
9029 */
9030 seq_printf(m, "level:\t\t%s\n", status & FAN_NS_CTRL ? "unknown" : "auto");
9031 } else {
9032 if (status & TP_EC_FAN_FULLSPEED)
9033 /* Disengaged mode takes precedence */
9034 seq_printf(m, "level:\t\tdisengaged\n");
9035 else if (status & TP_EC_FAN_AUTO)
9036 seq_printf(m, "level:\t\tauto\n");
9037 else
9038 seq_printf(m, "level:\t\t%d\n", status);
9039 }
9040 break;
9041
9042 case TPACPI_FAN_NONE:
9043 default:
9044 seq_printf(m, "status:\t\tnot supported\n");
9045 }
9046
9047 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
9048 seq_printf(m, "commands:\tlevel <level>");
9049
9050 switch (fan_control_access_mode) {
9051 case TPACPI_FAN_WR_ACPI_SFAN:
9052 seq_printf(m, " (<level> is 0-7)\n");
9053 break;
9054
9055 default:
9056 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
9057 break;
9058 }
9059 }
9060
9061 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
9062 seq_printf(m, "commands:\tenable, disable\n"
9063 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
9064
9065 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
9066 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
9067
9068 return 0;
9069 }
9070
fan_write_cmd_level(const char * cmd,int * rc)9071 static int fan_write_cmd_level(const char *cmd, int *rc)
9072 {
9073 int level;
9074
9075 if (strstarts(cmd, "level auto"))
9076 level = TP_EC_FAN_AUTO;
9077 else if (strstarts(cmd, "level disengaged") || strstarts(cmd, "level full-speed"))
9078 level = TP_EC_FAN_FULLSPEED;
9079 else if (sscanf(cmd, "level %d", &level) != 1)
9080 return 0;
9081
9082 *rc = fan_set_level_safe(level);
9083 if (*rc == -ENXIO)
9084 pr_err("level command accepted for unsupported access mode %d\n",
9085 fan_control_access_mode);
9086 else if (!*rc)
9087 tpacpi_disclose_usertask("procfs fan",
9088 "set level to %d\n", level);
9089
9090 return 1;
9091 }
9092
fan_write_cmd_enable(const char * cmd,int * rc)9093 static int fan_write_cmd_enable(const char *cmd, int *rc)
9094 {
9095 if (!strstarts(cmd, "enable"))
9096 return 0;
9097
9098 *rc = fan_set_enable();
9099 if (*rc == -ENXIO)
9100 pr_err("enable command accepted for unsupported access mode %d\n",
9101 fan_control_access_mode);
9102 else if (!*rc)
9103 tpacpi_disclose_usertask("procfs fan", "enable\n");
9104
9105 return 1;
9106 }
9107
fan_write_cmd_disable(const char * cmd,int * rc)9108 static int fan_write_cmd_disable(const char *cmd, int *rc)
9109 {
9110 if (!strstarts(cmd, "disable"))
9111 return 0;
9112
9113 *rc = fan_set_disable();
9114 if (*rc == -ENXIO)
9115 pr_err("disable command accepted for unsupported access mode %d\n",
9116 fan_control_access_mode);
9117 else if (!*rc)
9118 tpacpi_disclose_usertask("procfs fan", "disable\n");
9119
9120 return 1;
9121 }
9122
fan_write_cmd_speed(const char * cmd,int * rc)9123 static int fan_write_cmd_speed(const char *cmd, int *rc)
9124 {
9125 int speed;
9126
9127 /* TODO:
9128 * Support speed <low> <medium> <high> ? */
9129
9130 if (sscanf(cmd, "speed %d", &speed) != 1)
9131 return 0;
9132
9133 *rc = fan_set_speed(speed);
9134 if (*rc == -ENXIO)
9135 pr_err("speed command accepted for unsupported access mode %d\n",
9136 fan_control_access_mode);
9137 else if (!*rc)
9138 tpacpi_disclose_usertask("procfs fan",
9139 "set speed to %d\n", speed);
9140
9141 return 1;
9142 }
9143
fan_write_cmd_watchdog(const char * cmd,int * rc)9144 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
9145 {
9146 int interval;
9147
9148 if (sscanf(cmd, "watchdog %d", &interval) != 1)
9149 return 0;
9150
9151 if (interval < 0 || interval > 120)
9152 *rc = -EINVAL;
9153 else {
9154 fan_watchdog_maxinterval = interval;
9155 tpacpi_disclose_usertask("procfs fan",
9156 "set watchdog timer to %d\n",
9157 interval);
9158 }
9159
9160 return 1;
9161 }
9162
fan_write(char * buf)9163 static int fan_write(char *buf)
9164 {
9165 char *cmd;
9166 int rc = 0;
9167
9168 while (!rc && (cmd = strsep(&buf, ","))) {
9169 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
9170 fan_write_cmd_level(cmd, &rc)) &&
9171 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
9172 (fan_write_cmd_enable(cmd, &rc) ||
9173 fan_write_cmd_disable(cmd, &rc) ||
9174 fan_write_cmd_watchdog(cmd, &rc))) &&
9175 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
9176 fan_write_cmd_speed(cmd, &rc))
9177 )
9178 rc = -EINVAL;
9179 else if (!rc)
9180 fan_watchdog_reset();
9181 }
9182
9183 return rc;
9184 }
9185
9186 static struct ibm_struct fan_driver_data = {
9187 .name = "fan",
9188 .read = fan_read,
9189 .write = fan_write,
9190 .exit = fan_exit,
9191 .suspend = fan_suspend,
9192 .resume = fan_resume,
9193 };
9194
9195 /*************************************************************************
9196 * Mute LED subdriver
9197 */
9198
9199 #define TPACPI_LED_MAX 2
9200
9201 struct tp_led_table {
9202 acpi_string name;
9203 int on_value;
9204 int off_value;
9205 int state;
9206 };
9207
9208 static struct tp_led_table led_tables[TPACPI_LED_MAX] = {
9209 [LED_AUDIO_MUTE] = {
9210 .name = "SSMS",
9211 .on_value = 1,
9212 .off_value = 0,
9213 },
9214 [LED_AUDIO_MICMUTE] = {
9215 .name = "MMTS",
9216 .on_value = 2,
9217 .off_value = 0,
9218 },
9219 };
9220
mute_led_on_off(struct tp_led_table * t,bool state)9221 static int mute_led_on_off(struct tp_led_table *t, bool state)
9222 {
9223 acpi_handle temp;
9224 int output;
9225
9226 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9227 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
9228 return -EIO;
9229 }
9230
9231 if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
9232 state ? t->on_value : t->off_value))
9233 return -EIO;
9234
9235 t->state = state;
9236 return state;
9237 }
9238
tpacpi_led_set(int whichled,bool on)9239 static int tpacpi_led_set(int whichled, bool on)
9240 {
9241 struct tp_led_table *t;
9242
9243 t = &led_tables[whichled];
9244 if (t->state < 0 || t->state == on)
9245 return t->state;
9246 return mute_led_on_off(t, on);
9247 }
9248
tpacpi_led_mute_set(struct led_classdev * led_cdev,enum led_brightness brightness)9249 static int tpacpi_led_mute_set(struct led_classdev *led_cdev,
9250 enum led_brightness brightness)
9251 {
9252 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF);
9253 }
9254
tpacpi_led_micmute_set(struct led_classdev * led_cdev,enum led_brightness brightness)9255 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev,
9256 enum led_brightness brightness)
9257 {
9258 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF);
9259 }
9260
9261 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = {
9262 [LED_AUDIO_MUTE] = {
9263 .name = "platform::mute",
9264 .max_brightness = 1,
9265 .brightness_set_blocking = tpacpi_led_mute_set,
9266 .default_trigger = "audio-mute",
9267 },
9268 [LED_AUDIO_MICMUTE] = {
9269 .name = "platform::micmute",
9270 .max_brightness = 1,
9271 .brightness_set_blocking = tpacpi_led_micmute_set,
9272 .default_trigger = "audio-micmute",
9273 },
9274 };
9275
mute_led_init(struct ibm_init_struct * iibm)9276 static int mute_led_init(struct ibm_init_struct *iibm)
9277 {
9278 acpi_handle temp;
9279 int i, err;
9280
9281 for (i = 0; i < TPACPI_LED_MAX; i++) {
9282 struct tp_led_table *t = &led_tables[i];
9283 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9284 t->state = -ENODEV;
9285 continue;
9286 }
9287
9288 mute_led_cdev[i].brightness = ledtrig_audio_get(i);
9289 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]);
9290 if (err < 0) {
9291 while (i--)
9292 led_classdev_unregister(&mute_led_cdev[i]);
9293 return err;
9294 }
9295 }
9296 return 0;
9297 }
9298
mute_led_exit(void)9299 static void mute_led_exit(void)
9300 {
9301 int i;
9302
9303 for (i = 0; i < TPACPI_LED_MAX; i++) {
9304 led_classdev_unregister(&mute_led_cdev[i]);
9305 tpacpi_led_set(i, false);
9306 }
9307 }
9308
mute_led_resume(void)9309 static void mute_led_resume(void)
9310 {
9311 int i;
9312
9313 for (i = 0; i < TPACPI_LED_MAX; i++) {
9314 struct tp_led_table *t = &led_tables[i];
9315 if (t->state >= 0)
9316 mute_led_on_off(t, t->state);
9317 }
9318 }
9319
9320 static struct ibm_struct mute_led_driver_data = {
9321 .name = "mute_led",
9322 .exit = mute_led_exit,
9323 .resume = mute_led_resume,
9324 };
9325
9326 /*
9327 * Battery Wear Control Driver
9328 * Contact: Ognjen Galic <smclt30p@gmail.com>
9329 */
9330
9331 /* Metadata */
9332
9333 #define GET_START "BCTG"
9334 #define SET_START "BCCS"
9335 #define GET_STOP "BCSG"
9336 #define SET_STOP "BCSS"
9337 #define GET_DISCHARGE "BDSG"
9338 #define SET_DISCHARGE "BDSS"
9339 #define GET_INHIBIT "BICG"
9340 #define SET_INHIBIT "BICS"
9341
9342 enum {
9343 BAT_ANY = 0,
9344 BAT_PRIMARY = 1,
9345 BAT_SECONDARY = 2
9346 };
9347
9348 enum {
9349 /* Error condition bit */
9350 METHOD_ERR = BIT(31),
9351 };
9352
9353 enum {
9354 /* This is used in the get/set helpers */
9355 THRESHOLD_START,
9356 THRESHOLD_STOP,
9357 FORCE_DISCHARGE,
9358 INHIBIT_CHARGE,
9359 };
9360
9361 struct tpacpi_battery_data {
9362 int charge_start;
9363 int start_support;
9364 int charge_stop;
9365 int stop_support;
9366 unsigned int charge_behaviours;
9367 };
9368
9369 struct tpacpi_battery_driver_data {
9370 struct tpacpi_battery_data batteries[3];
9371 int individual_addressing;
9372 };
9373
9374 static struct tpacpi_battery_driver_data battery_info;
9375
9376 /* ACPI helpers/functions/probes */
9377
9378 /**
9379 * This evaluates a ACPI method call specific to the battery
9380 * ACPI extension. The specifics are that an error is marked
9381 * in the 32rd bit of the response, so we just check that here.
9382 */
tpacpi_battery_acpi_eval(char * method,int * ret,int param)9383 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param)
9384 {
9385 int response;
9386
9387 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) {
9388 acpi_handle_err(hkey_handle, "%s: evaluate failed", method);
9389 return AE_ERROR;
9390 }
9391 if (response & METHOD_ERR) {
9392 acpi_handle_err(hkey_handle,
9393 "%s evaluated but flagged as error", method);
9394 return AE_ERROR;
9395 }
9396 *ret = response;
9397 return AE_OK;
9398 }
9399
tpacpi_battery_get(int what,int battery,int * ret)9400 static int tpacpi_battery_get(int what, int battery, int *ret)
9401 {
9402 switch (what) {
9403 case THRESHOLD_START:
9404 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery))
9405 return -ENODEV;
9406
9407 /* The value is in the low 8 bits of the response */
9408 *ret = *ret & 0xFF;
9409 return 0;
9410 case THRESHOLD_STOP:
9411 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery))
9412 return -ENODEV;
9413 /* Value is in lower 8 bits */
9414 *ret = *ret & 0xFF;
9415 /*
9416 * On the stop value, if we return 0 that
9417 * does not make any sense. 0 means Default, which
9418 * means that charging stops at 100%, so we return
9419 * that.
9420 */
9421 if (*ret == 0)
9422 *ret = 100;
9423 return 0;
9424 case FORCE_DISCHARGE:
9425 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, ret, battery))
9426 return -ENODEV;
9427 /* The force discharge status is in bit 0 */
9428 *ret = *ret & 0x01;
9429 return 0;
9430 case INHIBIT_CHARGE:
9431 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, ret, battery))
9432 return -ENODEV;
9433 /* The inhibit charge status is in bit 0 */
9434 *ret = *ret & 0x01;
9435 return 0;
9436 default:
9437 pr_crit("wrong parameter: %d", what);
9438 return -EINVAL;
9439 }
9440 }
9441
tpacpi_battery_set(int what,int battery,int value)9442 static int tpacpi_battery_set(int what, int battery, int value)
9443 {
9444 int param, ret;
9445 /* The first 8 bits are the value of the threshold */
9446 param = value;
9447 /* The battery ID is in bits 8-9, 2 bits */
9448 param |= battery << 8;
9449
9450 switch (what) {
9451 case THRESHOLD_START:
9452 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) {
9453 pr_err("failed to set charge threshold on battery %d",
9454 battery);
9455 return -ENODEV;
9456 }
9457 return 0;
9458 case THRESHOLD_STOP:
9459 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) {
9460 pr_err("failed to set stop threshold: %d", battery);
9461 return -ENODEV;
9462 }
9463 return 0;
9464 case FORCE_DISCHARGE:
9465 /* Force discharge is in bit 0,
9466 * break on AC attach is in bit 1 (won't work on some ThinkPads),
9467 * battery ID is in bits 8-9, 2 bits.
9468 */
9469 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_DISCHARGE, &ret, param))) {
9470 pr_err("failed to set force discharge on %d", battery);
9471 return -ENODEV;
9472 }
9473 return 0;
9474 case INHIBIT_CHARGE:
9475 /* When setting inhibit charge, we set a default value of
9476 * always breaking on AC detach and the effective time is set to
9477 * be permanent.
9478 * The battery ID is in bits 4-5, 2 bits,
9479 * the effective time is in bits 8-23, 2 bytes.
9480 * A time of FFFF indicates forever.
9481 */
9482 param = value;
9483 param |= battery << 4;
9484 param |= 0xFFFF << 8;
9485 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_INHIBIT, &ret, param))) {
9486 pr_err("failed to set inhibit charge on %d", battery);
9487 return -ENODEV;
9488 }
9489 return 0;
9490 default:
9491 pr_crit("wrong parameter: %d", what);
9492 return -EINVAL;
9493 }
9494 }
9495
tpacpi_battery_set_validate(int what,int battery,int value)9496 static int tpacpi_battery_set_validate(int what, int battery, int value)
9497 {
9498 int ret, v;
9499
9500 ret = tpacpi_battery_set(what, battery, value);
9501 if (ret < 0)
9502 return ret;
9503
9504 ret = tpacpi_battery_get(what, battery, &v);
9505 if (ret < 0)
9506 return ret;
9507
9508 if (v == value)
9509 return 0;
9510
9511 msleep(500);
9512
9513 ret = tpacpi_battery_get(what, battery, &v);
9514 if (ret < 0)
9515 return ret;
9516
9517 if (v == value)
9518 return 0;
9519
9520 return -EIO;
9521 }
9522
tpacpi_battery_probe(int battery)9523 static int tpacpi_battery_probe(int battery)
9524 {
9525 int ret = 0;
9526
9527 memset(&battery_info.batteries[battery], 0,
9528 sizeof(battery_info.batteries[battery]));
9529
9530 /*
9531 * 1) Get the current start threshold
9532 * 2) Check for support
9533 * 3) Get the current stop threshold
9534 * 4) Check for support
9535 * 5) Get the current force discharge status
9536 * 6) Check for support
9537 * 7) Get the current inhibit charge status
9538 * 8) Check for support
9539 */
9540 if (acpi_has_method(hkey_handle, GET_START)) {
9541 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
9542 pr_err("Error probing battery %d\n", battery);
9543 return -ENODEV;
9544 }
9545 /* Individual addressing is in bit 9 */
9546 if (ret & BIT(9))
9547 battery_info.individual_addressing = true;
9548 /* Support is marked in bit 8 */
9549 if (ret & BIT(8))
9550 battery_info.batteries[battery].start_support = 1;
9551 else
9552 return -ENODEV;
9553 if (tpacpi_battery_get(THRESHOLD_START, battery,
9554 &battery_info.batteries[battery].charge_start)) {
9555 pr_err("Error probing battery %d\n", battery);
9556 return -ENODEV;
9557 }
9558 }
9559 if (acpi_has_method(hkey_handle, GET_STOP)) {
9560 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) {
9561 pr_err("Error probing battery stop; %d\n", battery);
9562 return -ENODEV;
9563 }
9564 /* Support is marked in bit 8 */
9565 if (ret & BIT(8))
9566 battery_info.batteries[battery].stop_support = 1;
9567 else
9568 return -ENODEV;
9569 if (tpacpi_battery_get(THRESHOLD_STOP, battery,
9570 &battery_info.batteries[battery].charge_stop)) {
9571 pr_err("Error probing battery stop: %d\n", battery);
9572 return -ENODEV;
9573 }
9574 }
9575 if (acpi_has_method(hkey_handle, GET_DISCHARGE)) {
9576 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, &ret, battery))) {
9577 pr_err("Error probing battery discharge; %d\n", battery);
9578 return -ENODEV;
9579 }
9580 /* Support is marked in bit 8 */
9581 if (ret & BIT(8))
9582 battery_info.batteries[battery].charge_behaviours |=
9583 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE);
9584 }
9585 if (acpi_has_method(hkey_handle, GET_INHIBIT)) {
9586 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, &ret, battery))) {
9587 pr_err("Error probing battery inhibit charge; %d\n", battery);
9588 return -ENODEV;
9589 }
9590 /* Support is marked in bit 5 */
9591 if (ret & BIT(5))
9592 battery_info.batteries[battery].charge_behaviours |=
9593 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE);
9594 }
9595
9596 battery_info.batteries[battery].charge_behaviours |=
9597 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO);
9598
9599 pr_info("battery %d registered (start %d, stop %d, behaviours: 0x%x)\n",
9600 battery,
9601 battery_info.batteries[battery].charge_start,
9602 battery_info.batteries[battery].charge_stop,
9603 battery_info.batteries[battery].charge_behaviours);
9604
9605 return 0;
9606 }
9607
9608 /* General helper functions */
9609
tpacpi_battery_get_id(const char * battery_name)9610 static int tpacpi_battery_get_id(const char *battery_name)
9611 {
9612
9613 if (strcmp(battery_name, "BAT0") == 0 ||
9614 tp_features.battery_force_primary)
9615 return BAT_PRIMARY;
9616 if (strcmp(battery_name, "BAT1") == 0)
9617 return BAT_SECONDARY;
9618 /*
9619 * If for some reason the battery is not BAT0 nor is it
9620 * BAT1, we will assume it's the default, first battery,
9621 * AKA primary.
9622 */
9623 pr_warn("unknown battery %s, assuming primary", battery_name);
9624 return BAT_PRIMARY;
9625 }
9626
9627 /* sysfs interface */
9628
tpacpi_battery_store(int what,struct device * dev,const char * buf,size_t count)9629 static ssize_t tpacpi_battery_store(int what,
9630 struct device *dev,
9631 const char *buf, size_t count)
9632 {
9633 struct power_supply *supply = to_power_supply(dev);
9634 unsigned long value;
9635 int battery, rval;
9636 /*
9637 * Some systems have support for more than
9638 * one battery. If that is the case,
9639 * tpacpi_battery_probe marked that addressing
9640 * them individually is supported, so we do that
9641 * based on the device struct.
9642 *
9643 * On systems that are not supported, we assume
9644 * the primary as most of the ACPI calls fail
9645 * with "Any Battery" as the parameter.
9646 */
9647 if (battery_info.individual_addressing)
9648 /* BAT_PRIMARY or BAT_SECONDARY */
9649 battery = tpacpi_battery_get_id(supply->desc->name);
9650 else
9651 battery = BAT_PRIMARY;
9652
9653 rval = kstrtoul(buf, 10, &value);
9654 if (rval)
9655 return rval;
9656
9657 switch (what) {
9658 case THRESHOLD_START:
9659 if (!battery_info.batteries[battery].start_support)
9660 return -ENODEV;
9661 /* valid values are [0, 99] */
9662 if (value > 99)
9663 return -EINVAL;
9664 if (value > battery_info.batteries[battery].charge_stop)
9665 return -EINVAL;
9666 if (tpacpi_battery_set(THRESHOLD_START, battery, value))
9667 return -ENODEV;
9668 battery_info.batteries[battery].charge_start = value;
9669 return count;
9670
9671 case THRESHOLD_STOP:
9672 if (!battery_info.batteries[battery].stop_support)
9673 return -ENODEV;
9674 /* valid values are [1, 100] */
9675 if (value < 1 || value > 100)
9676 return -EINVAL;
9677 if (value < battery_info.batteries[battery].charge_start)
9678 return -EINVAL;
9679 battery_info.batteries[battery].charge_stop = value;
9680 /*
9681 * When 100 is passed to stop, we need to flip
9682 * it to 0 as that the EC understands that as
9683 * "Default", which will charge to 100%
9684 */
9685 if (value == 100)
9686 value = 0;
9687 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value))
9688 return -EINVAL;
9689 return count;
9690 default:
9691 pr_crit("Wrong parameter: %d", what);
9692 return -EINVAL;
9693 }
9694 return count;
9695 }
9696
tpacpi_battery_show(int what,struct device * dev,char * buf)9697 static ssize_t tpacpi_battery_show(int what,
9698 struct device *dev,
9699 char *buf)
9700 {
9701 struct power_supply *supply = to_power_supply(dev);
9702 int ret, battery;
9703 /*
9704 * Some systems have support for more than
9705 * one battery. If that is the case,
9706 * tpacpi_battery_probe marked that addressing
9707 * them individually is supported, so we;
9708 * based on the device struct.
9709 *
9710 * On systems that are not supported, we assume
9711 * the primary as most of the ACPI calls fail
9712 * with "Any Battery" as the parameter.
9713 */
9714 if (battery_info.individual_addressing)
9715 /* BAT_PRIMARY or BAT_SECONDARY */
9716 battery = tpacpi_battery_get_id(supply->desc->name);
9717 else
9718 battery = BAT_PRIMARY;
9719 if (tpacpi_battery_get(what, battery, &ret))
9720 return -ENODEV;
9721 return sprintf(buf, "%d\n", ret);
9722 }
9723
charge_control_start_threshold_show(struct device * device,struct device_attribute * attr,char * buf)9724 static ssize_t charge_control_start_threshold_show(struct device *device,
9725 struct device_attribute *attr,
9726 char *buf)
9727 {
9728 return tpacpi_battery_show(THRESHOLD_START, device, buf);
9729 }
9730
charge_control_end_threshold_show(struct device * device,struct device_attribute * attr,char * buf)9731 static ssize_t charge_control_end_threshold_show(struct device *device,
9732 struct device_attribute *attr,
9733 char *buf)
9734 {
9735 return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
9736 }
9737
charge_behaviour_show(struct device * dev,struct device_attribute * attr,char * buf)9738 static ssize_t charge_behaviour_show(struct device *dev,
9739 struct device_attribute *attr,
9740 char *buf)
9741 {
9742 enum power_supply_charge_behaviour active = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO;
9743 struct power_supply *supply = to_power_supply(dev);
9744 unsigned int available;
9745 int ret, battery;
9746
9747 battery = tpacpi_battery_get_id(supply->desc->name);
9748 available = battery_info.batteries[battery].charge_behaviours;
9749
9750 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) {
9751 if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret))
9752 return -ENODEV;
9753 if (ret) {
9754 active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE;
9755 goto out;
9756 }
9757 }
9758
9759 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) {
9760 if (tpacpi_battery_get(INHIBIT_CHARGE, battery, &ret))
9761 return -ENODEV;
9762 if (ret) {
9763 active = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE;
9764 goto out;
9765 }
9766 }
9767
9768 out:
9769 return power_supply_charge_behaviour_show(dev, available, active, buf);
9770 }
9771
charge_control_start_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9772 static ssize_t charge_control_start_threshold_store(struct device *dev,
9773 struct device_attribute *attr,
9774 const char *buf, size_t count)
9775 {
9776 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count);
9777 }
9778
charge_control_end_threshold_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9779 static ssize_t charge_control_end_threshold_store(struct device *dev,
9780 struct device_attribute *attr,
9781 const char *buf, size_t count)
9782 {
9783 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
9784 }
9785
charge_behaviour_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)9786 static ssize_t charge_behaviour_store(struct device *dev,
9787 struct device_attribute *attr,
9788 const char *buf, size_t count)
9789 {
9790 struct power_supply *supply = to_power_supply(dev);
9791 int selected, battery, ret = 0;
9792 unsigned int available;
9793
9794 battery = tpacpi_battery_get_id(supply->desc->name);
9795 available = battery_info.batteries[battery].charge_behaviours;
9796 selected = power_supply_charge_behaviour_parse(available, buf);
9797
9798 if (selected < 0)
9799 return selected;
9800
9801 switch (selected) {
9802 case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO:
9803 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
9804 ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
9805 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
9806 ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0));
9807 if (ret < 0)
9808 return ret;
9809 break;
9810 case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE:
9811 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
9812 ret = tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0);
9813 ret = min(ret, tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1));
9814 if (ret < 0)
9815 return ret;
9816 break;
9817 case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE:
9818 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
9819 ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
9820 ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 1));
9821 if (ret < 0)
9822 return ret;
9823 break;
9824 default:
9825 dev_err(dev, "Unexpected charge behaviour: %d\n", selected);
9826 return -EINVAL;
9827 }
9828
9829 return count;
9830 }
9831
9832 static DEVICE_ATTR_RW(charge_control_start_threshold);
9833 static DEVICE_ATTR_RW(charge_control_end_threshold);
9834 static DEVICE_ATTR_RW(charge_behaviour);
9835 static struct device_attribute dev_attr_charge_start_threshold = __ATTR(
9836 charge_start_threshold,
9837 0644,
9838 charge_control_start_threshold_show,
9839 charge_control_start_threshold_store
9840 );
9841 static struct device_attribute dev_attr_charge_stop_threshold = __ATTR(
9842 charge_stop_threshold,
9843 0644,
9844 charge_control_end_threshold_show,
9845 charge_control_end_threshold_store
9846 );
9847
9848 static struct attribute *tpacpi_battery_attrs[] = {
9849 &dev_attr_charge_control_start_threshold.attr,
9850 &dev_attr_charge_control_end_threshold.attr,
9851 &dev_attr_charge_start_threshold.attr,
9852 &dev_attr_charge_stop_threshold.attr,
9853 &dev_attr_charge_behaviour.attr,
9854 NULL,
9855 };
9856
9857 ATTRIBUTE_GROUPS(tpacpi_battery);
9858
9859 /* ACPI battery hooking */
9860
tpacpi_battery_add(struct power_supply * battery,struct acpi_battery_hook * hook)9861 static int tpacpi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
9862 {
9863 int batteryid = tpacpi_battery_get_id(battery->desc->name);
9864
9865 if (tpacpi_battery_probe(batteryid))
9866 return -ENODEV;
9867 if (device_add_groups(&battery->dev, tpacpi_battery_groups))
9868 return -ENODEV;
9869 return 0;
9870 }
9871
tpacpi_battery_remove(struct power_supply * battery,struct acpi_battery_hook * hook)9872 static int tpacpi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
9873 {
9874 device_remove_groups(&battery->dev, tpacpi_battery_groups);
9875 return 0;
9876 }
9877
9878 static struct acpi_battery_hook battery_hook = {
9879 .add_battery = tpacpi_battery_add,
9880 .remove_battery = tpacpi_battery_remove,
9881 .name = "ThinkPad Battery Extension",
9882 };
9883
9884 /* Subdriver init/exit */
9885
9886 static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
9887 /*
9888 * Individual addressing is broken on models that expose the
9889 * primary battery as BAT1.
9890 */
9891 TPACPI_Q_LNV('8', 'F', true), /* Thinkpad X120e */
9892 TPACPI_Q_LNV('J', '7', true), /* B5400 */
9893 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */
9894 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
9895 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
9896 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
9897 TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */
9898 };
9899
tpacpi_battery_init(struct ibm_init_struct * ibm)9900 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
9901 {
9902 memset(&battery_info, 0, sizeof(battery_info));
9903
9904 tp_features.battery_force_primary = tpacpi_check_quirks(
9905 battery_quirk_table,
9906 ARRAY_SIZE(battery_quirk_table));
9907
9908 battery_hook_register(&battery_hook);
9909 return 0;
9910 }
9911
tpacpi_battery_exit(void)9912 static void tpacpi_battery_exit(void)
9913 {
9914 battery_hook_unregister(&battery_hook);
9915 }
9916
9917 static struct ibm_struct battery_driver_data = {
9918 .name = "battery",
9919 .exit = tpacpi_battery_exit,
9920 };
9921
9922 /*************************************************************************
9923 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature
9924 */
9925
9926 static struct drm_privacy_screen *lcdshadow_dev;
9927 static acpi_handle lcdshadow_get_handle;
9928 static acpi_handle lcdshadow_set_handle;
9929
lcdshadow_set_sw_state(struct drm_privacy_screen * priv,enum drm_privacy_screen_status state)9930 static int lcdshadow_set_sw_state(struct drm_privacy_screen *priv,
9931 enum drm_privacy_screen_status state)
9932 {
9933 int output;
9934
9935 if (WARN_ON(!mutex_is_locked(&priv->lock)))
9936 return -EIO;
9937
9938 if (!acpi_evalf(lcdshadow_set_handle, &output, NULL, "dd", (int)state))
9939 return -EIO;
9940
9941 priv->hw_state = priv->sw_state = state;
9942 return 0;
9943 }
9944
lcdshadow_get_hw_state(struct drm_privacy_screen * priv)9945 static void lcdshadow_get_hw_state(struct drm_privacy_screen *priv)
9946 {
9947 int output;
9948
9949 if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0))
9950 return;
9951
9952 priv->hw_state = priv->sw_state = output & 0x1;
9953 }
9954
9955 static const struct drm_privacy_screen_ops lcdshadow_ops = {
9956 .set_sw_state = lcdshadow_set_sw_state,
9957 .get_hw_state = lcdshadow_get_hw_state,
9958 };
9959
tpacpi_lcdshadow_init(struct ibm_init_struct * iibm)9960 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm)
9961 {
9962 acpi_status status1, status2;
9963 int output;
9964
9965 status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle);
9966 status2 = acpi_get_handle(hkey_handle, "SSSS", &lcdshadow_set_handle);
9967 if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2))
9968 return 0;
9969
9970 if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0))
9971 return -EIO;
9972
9973 if (!(output & 0x10000))
9974 return 0;
9975
9976 lcdshadow_dev = drm_privacy_screen_register(&tpacpi_pdev->dev,
9977 &lcdshadow_ops, NULL);
9978 if (IS_ERR(lcdshadow_dev))
9979 return PTR_ERR(lcdshadow_dev);
9980
9981 return 0;
9982 }
9983
lcdshadow_exit(void)9984 static void lcdshadow_exit(void)
9985 {
9986 drm_privacy_screen_unregister(lcdshadow_dev);
9987 }
9988
lcdshadow_resume(void)9989 static void lcdshadow_resume(void)
9990 {
9991 if (!lcdshadow_dev)
9992 return;
9993
9994 mutex_lock(&lcdshadow_dev->lock);
9995 lcdshadow_set_sw_state(lcdshadow_dev, lcdshadow_dev->sw_state);
9996 mutex_unlock(&lcdshadow_dev->lock);
9997 }
9998
lcdshadow_read(struct seq_file * m)9999 static int lcdshadow_read(struct seq_file *m)
10000 {
10001 if (!lcdshadow_dev) {
10002 seq_puts(m, "status:\t\tnot supported\n");
10003 } else {
10004 seq_printf(m, "status:\t\t%d\n", lcdshadow_dev->hw_state);
10005 seq_puts(m, "commands:\t0, 1\n");
10006 }
10007
10008 return 0;
10009 }
10010
lcdshadow_write(char * buf)10011 static int lcdshadow_write(char *buf)
10012 {
10013 char *cmd;
10014 int res, state = -EINVAL;
10015
10016 if (!lcdshadow_dev)
10017 return -ENODEV;
10018
10019 while ((cmd = strsep(&buf, ","))) {
10020 res = kstrtoint(cmd, 10, &state);
10021 if (res < 0)
10022 return res;
10023 }
10024
10025 if (state >= 2 || state < 0)
10026 return -EINVAL;
10027
10028 mutex_lock(&lcdshadow_dev->lock);
10029 res = lcdshadow_set_sw_state(lcdshadow_dev, state);
10030 mutex_unlock(&lcdshadow_dev->lock);
10031
10032 drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
10033
10034 return res;
10035 }
10036
10037 static struct ibm_struct lcdshadow_driver_data = {
10038 .name = "lcdshadow",
10039 .exit = lcdshadow_exit,
10040 .resume = lcdshadow_resume,
10041 .read = lcdshadow_read,
10042 .write = lcdshadow_write,
10043 };
10044
10045 /*************************************************************************
10046 * Thinkpad sensor interfaces
10047 */
10048
10049 #define DYTC_CMD_QUERY 0 /* To get DYTC status - enable/revision */
10050 #define DYTC_QUERY_ENABLE_BIT 8 /* Bit 8 - 0 = disabled, 1 = enabled */
10051 #define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */
10052 #define DYTC_QUERY_REV_BIT 28 /* Bits 28 - 31 - revision */
10053
10054 #define DYTC_CMD_GET 2 /* To get current IC function and mode */
10055 #define DYTC_GET_LAPMODE_BIT 17 /* Set when in lapmode */
10056
10057 #define PALMSENSOR_PRESENT_BIT 0 /* Determine if psensor present */
10058 #define PALMSENSOR_ON_BIT 1 /* psensor status */
10059
10060 static bool has_palmsensor;
10061 static bool has_lapsensor;
10062 static bool palm_state;
10063 static bool lap_state;
10064 static int dytc_version;
10065
dytc_command(int command,int * output)10066 static int dytc_command(int command, int *output)
10067 {
10068 acpi_handle dytc_handle;
10069
10070 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DYTC", &dytc_handle))) {
10071 /* Platform doesn't support DYTC */
10072 return -ENODEV;
10073 }
10074 if (!acpi_evalf(dytc_handle, output, NULL, "dd", command))
10075 return -EIO;
10076 return 0;
10077 }
10078
lapsensor_get(bool * present,bool * state)10079 static int lapsensor_get(bool *present, bool *state)
10080 {
10081 int output, err;
10082
10083 *present = false;
10084 err = dytc_command(DYTC_CMD_GET, &output);
10085 if (err)
10086 return err;
10087
10088 *present = true; /*If we get his far, we have lapmode support*/
10089 *state = output & BIT(DYTC_GET_LAPMODE_BIT) ? true : false;
10090 return 0;
10091 }
10092
palmsensor_get(bool * present,bool * state)10093 static int palmsensor_get(bool *present, bool *state)
10094 {
10095 acpi_handle psensor_handle;
10096 int output;
10097
10098 *present = false;
10099 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GPSS", &psensor_handle)))
10100 return -ENODEV;
10101 if (!acpi_evalf(psensor_handle, &output, NULL, "d"))
10102 return -EIO;
10103
10104 *present = output & BIT(PALMSENSOR_PRESENT_BIT) ? true : false;
10105 *state = output & BIT(PALMSENSOR_ON_BIT) ? true : false;
10106 return 0;
10107 }
10108
lapsensor_refresh(void)10109 static void lapsensor_refresh(void)
10110 {
10111 bool state;
10112 int err;
10113
10114 if (has_lapsensor) {
10115 err = lapsensor_get(&has_lapsensor, &state);
10116 if (err)
10117 return;
10118 if (lap_state != state) {
10119 lap_state = state;
10120 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "dytc_lapmode");
10121 }
10122 }
10123 }
10124
palmsensor_refresh(void)10125 static void palmsensor_refresh(void)
10126 {
10127 bool state;
10128 int err;
10129
10130 if (has_palmsensor) {
10131 err = palmsensor_get(&has_palmsensor, &state);
10132 if (err)
10133 return;
10134 if (palm_state != state) {
10135 palm_state = state;
10136 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "palmsensor");
10137 }
10138 }
10139 }
10140
dytc_lapmode_show(struct device * dev,struct device_attribute * attr,char * buf)10141 static ssize_t dytc_lapmode_show(struct device *dev,
10142 struct device_attribute *attr,
10143 char *buf)
10144 {
10145 if (has_lapsensor)
10146 return sysfs_emit(buf, "%d\n", lap_state);
10147 return sysfs_emit(buf, "\n");
10148 }
10149 static DEVICE_ATTR_RO(dytc_lapmode);
10150
palmsensor_show(struct device * dev,struct device_attribute * attr,char * buf)10151 static ssize_t palmsensor_show(struct device *dev,
10152 struct device_attribute *attr,
10153 char *buf)
10154 {
10155 if (has_palmsensor)
10156 return sysfs_emit(buf, "%d\n", palm_state);
10157 return sysfs_emit(buf, "\n");
10158 }
10159 static DEVICE_ATTR_RO(palmsensor);
10160
10161 static struct attribute *proxsensor_attributes[] = {
10162 &dev_attr_dytc_lapmode.attr,
10163 &dev_attr_palmsensor.attr,
10164 NULL
10165 };
10166
proxsensor_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10167 static umode_t proxsensor_attr_is_visible(struct kobject *kobj,
10168 struct attribute *attr, int n)
10169 {
10170 if (attr == &dev_attr_dytc_lapmode.attr) {
10171 /*
10172 * Platforms before DYTC version 5 claim to have a lap sensor,
10173 * but it doesn't work, so we ignore them.
10174 */
10175 if (!has_lapsensor || dytc_version < 5)
10176 return 0;
10177 } else if (attr == &dev_attr_palmsensor.attr) {
10178 if (!has_palmsensor)
10179 return 0;
10180 }
10181
10182 return attr->mode;
10183 }
10184
10185 static const struct attribute_group proxsensor_attr_group = {
10186 .is_visible = proxsensor_attr_is_visible,
10187 .attrs = proxsensor_attributes,
10188 };
10189
tpacpi_proxsensor_init(struct ibm_init_struct * iibm)10190 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
10191 {
10192 int palm_err, lap_err;
10193
10194 palm_err = palmsensor_get(&has_palmsensor, &palm_state);
10195 lap_err = lapsensor_get(&has_lapsensor, &lap_state);
10196 /* If support isn't available for both devices return -ENODEV */
10197 if ((palm_err == -ENODEV) && (lap_err == -ENODEV))
10198 return -ENODEV;
10199 /* Otherwise, if there was an error return it */
10200 if (palm_err && (palm_err != -ENODEV))
10201 return palm_err;
10202 if (lap_err && (lap_err != -ENODEV))
10203 return lap_err;
10204
10205 return 0;
10206 }
10207
10208 static struct ibm_struct proxsensor_driver_data = {
10209 .name = "proximity-sensor",
10210 };
10211
10212 /*************************************************************************
10213 * DYTC Platform Profile interface
10214 */
10215
10216 #define DYTC_CMD_SET 1 /* To enable/disable IC function mode */
10217 #define DYTC_CMD_MMC_GET 8 /* To get current MMC function and mode */
10218 #define DYTC_CMD_RESET 0x1ff /* To reset back to default */
10219
10220 #define DYTC_CMD_FUNC_CAP 3 /* To get DYTC capabilities */
10221 #define DYTC_FC_MMC 27 /* MMC Mode supported */
10222 #define DYTC_FC_PSC 29 /* PSC Mode supported */
10223 #define DYTC_FC_AMT 31 /* AMT mode supported */
10224
10225 #define DYTC_GET_FUNCTION_BIT 8 /* Bits 8-11 - function setting */
10226 #define DYTC_GET_MODE_BIT 12 /* Bits 12-15 - mode setting */
10227
10228 #define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */
10229 #define DYTC_SET_MODE_BIT 16 /* Bits 16-19 - mode setting */
10230 #define DYTC_SET_VALID_BIT 20 /* Bit 20 - 1 = on, 0 = off */
10231
10232 #define DYTC_FUNCTION_STD 0 /* Function = 0, standard mode */
10233 #define DYTC_FUNCTION_CQL 1 /* Function = 1, lap mode */
10234 #define DYTC_FUNCTION_MMC 11 /* Function = 11, MMC mode */
10235 #define DYTC_FUNCTION_PSC 13 /* Function = 13, PSC mode */
10236 #define DYTC_FUNCTION_AMT 15 /* Function = 15, AMT mode */
10237
10238 #define DYTC_MODE_AMT_ENABLE 0x1 /* Enable AMT (in balanced mode) */
10239 #define DYTC_MODE_AMT_DISABLE 0xF /* Disable AMT (in other modes) */
10240
10241 #define DYTC_MODE_MMC_PERFORM 2 /* High power mode aka performance */
10242 #define DYTC_MODE_MMC_LOWPOWER 3 /* Low power mode */
10243 #define DYTC_MODE_MMC_BALANCE 0xF /* Default mode aka balanced */
10244 #define DYTC_MODE_MMC_DEFAULT 0 /* Default mode from MMC_GET, aka balanced */
10245
10246 #define DYTC_MODE_PSC_LOWPOWER 3 /* Low power mode */
10247 #define DYTC_MODE_PSC_BALANCE 5 /* Default mode aka balanced */
10248 #define DYTC_MODE_PSC_PERFORM 7 /* High power mode aka performance */
10249
10250 #define DYTC_ERR_MASK 0xF /* Bits 0-3 in cmd result are the error result */
10251 #define DYTC_ERR_SUCCESS 1 /* CMD completed successful */
10252
10253 #define DYTC_SET_COMMAND(function, mode, on) \
10254 (DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \
10255 (mode) << DYTC_SET_MODE_BIT | \
10256 (on) << DYTC_SET_VALID_BIT)
10257
10258 #define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 0)
10259 #define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 1)
10260 static int dytc_control_amt(bool enable);
10261 static bool dytc_amt_active;
10262
10263 static enum platform_profile_option dytc_current_profile;
10264 static atomic_t dytc_ignore_event = ATOMIC_INIT(0);
10265 static DEFINE_MUTEX(dytc_mutex);
10266 static int dytc_capabilities;
10267 static bool dytc_mmc_get_available;
10268 static int profile_force;
10269
convert_dytc_to_profile(int funcmode,int dytcmode,enum platform_profile_option * profile)10270 static int convert_dytc_to_profile(int funcmode, int dytcmode,
10271 enum platform_profile_option *profile)
10272 {
10273 switch (funcmode) {
10274 case DYTC_FUNCTION_MMC:
10275 switch (dytcmode) {
10276 case DYTC_MODE_MMC_LOWPOWER:
10277 *profile = PLATFORM_PROFILE_LOW_POWER;
10278 break;
10279 case DYTC_MODE_MMC_DEFAULT:
10280 case DYTC_MODE_MMC_BALANCE:
10281 *profile = PLATFORM_PROFILE_BALANCED;
10282 break;
10283 case DYTC_MODE_MMC_PERFORM:
10284 *profile = PLATFORM_PROFILE_PERFORMANCE;
10285 break;
10286 default: /* Unknown mode */
10287 return -EINVAL;
10288 }
10289 return 0;
10290 case DYTC_FUNCTION_PSC:
10291 switch (dytcmode) {
10292 case DYTC_MODE_PSC_LOWPOWER:
10293 *profile = PLATFORM_PROFILE_LOW_POWER;
10294 break;
10295 case DYTC_MODE_PSC_BALANCE:
10296 *profile = PLATFORM_PROFILE_BALANCED;
10297 break;
10298 case DYTC_MODE_PSC_PERFORM:
10299 *profile = PLATFORM_PROFILE_PERFORMANCE;
10300 break;
10301 default: /* Unknown mode */
10302 return -EINVAL;
10303 }
10304 return 0;
10305 case DYTC_FUNCTION_AMT:
10306 /* For now return balanced. It's the closest we have to 'auto' */
10307 *profile = PLATFORM_PROFILE_BALANCED;
10308 return 0;
10309 default:
10310 /* Unknown function */
10311 pr_debug("unknown function 0x%x\n", funcmode);
10312 return -EOPNOTSUPP;
10313 }
10314 return 0;
10315 }
10316
convert_profile_to_dytc(enum platform_profile_option profile,int * perfmode)10317 static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode)
10318 {
10319 switch (profile) {
10320 case PLATFORM_PROFILE_LOW_POWER:
10321 if (dytc_capabilities & BIT(DYTC_FC_MMC))
10322 *perfmode = DYTC_MODE_MMC_LOWPOWER;
10323 else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10324 *perfmode = DYTC_MODE_PSC_LOWPOWER;
10325 break;
10326 case PLATFORM_PROFILE_BALANCED:
10327 if (dytc_capabilities & BIT(DYTC_FC_MMC))
10328 *perfmode = DYTC_MODE_MMC_BALANCE;
10329 else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10330 *perfmode = DYTC_MODE_PSC_BALANCE;
10331 break;
10332 case PLATFORM_PROFILE_PERFORMANCE:
10333 if (dytc_capabilities & BIT(DYTC_FC_MMC))
10334 *perfmode = DYTC_MODE_MMC_PERFORM;
10335 else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10336 *perfmode = DYTC_MODE_PSC_PERFORM;
10337 break;
10338 default: /* Unknown profile */
10339 return -EOPNOTSUPP;
10340 }
10341 return 0;
10342 }
10343
10344 /*
10345 * dytc_profile_get: Function to register with platform_profile
10346 * handler. Returns current platform profile.
10347 */
dytc_profile_get(struct platform_profile_handler * pprof,enum platform_profile_option * profile)10348 static int dytc_profile_get(struct platform_profile_handler *pprof,
10349 enum platform_profile_option *profile)
10350 {
10351 *profile = dytc_current_profile;
10352 return 0;
10353 }
10354
dytc_control_amt(bool enable)10355 static int dytc_control_amt(bool enable)
10356 {
10357 int dummy;
10358 int err;
10359 int cmd;
10360
10361 if (!(dytc_capabilities & BIT(DYTC_FC_AMT))) {
10362 pr_warn("Attempting to toggle AMT on a system that doesn't advertise support\n");
10363 return -ENODEV;
10364 }
10365
10366 if (enable)
10367 cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_ENABLE, enable);
10368 else
10369 cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_DISABLE, enable);
10370
10371 pr_debug("%sabling AMT (cmd 0x%x)", enable ? "en":"dis", cmd);
10372 err = dytc_command(cmd, &dummy);
10373 if (err)
10374 return err;
10375 dytc_amt_active = enable;
10376 return 0;
10377 }
10378
10379 /*
10380 * Helper function - check if we are in CQL mode and if we are
10381 * - disable CQL,
10382 * - run the command
10383 * - enable CQL
10384 * If not in CQL mode, just run the command
10385 */
dytc_cql_command(int command,int * output)10386 static int dytc_cql_command(int command, int *output)
10387 {
10388 int err, cmd_err, dummy;
10389 int cur_funcmode;
10390
10391 /* Determine if we are in CQL mode. This alters the commands we do */
10392 err = dytc_command(DYTC_CMD_GET, output);
10393 if (err)
10394 return err;
10395
10396 cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF;
10397 /* Check if we're OK to return immediately */
10398 if ((command == DYTC_CMD_GET) && (cur_funcmode != DYTC_FUNCTION_CQL))
10399 return 0;
10400
10401 if (cur_funcmode == DYTC_FUNCTION_CQL) {
10402 atomic_inc(&dytc_ignore_event);
10403 err = dytc_command(DYTC_DISABLE_CQL, &dummy);
10404 if (err)
10405 return err;
10406 }
10407
10408 cmd_err = dytc_command(command, output);
10409 /* Check return condition after we've restored CQL state */
10410
10411 if (cur_funcmode == DYTC_FUNCTION_CQL) {
10412 err = dytc_command(DYTC_ENABLE_CQL, &dummy);
10413 if (err)
10414 return err;
10415 }
10416 return cmd_err;
10417 }
10418
10419 /*
10420 * dytc_profile_set: Function to register with platform_profile
10421 * handler. Sets current platform profile.
10422 */
dytc_profile_set(struct platform_profile_handler * pprof,enum platform_profile_option profile)10423 static int dytc_profile_set(struct platform_profile_handler *pprof,
10424 enum platform_profile_option profile)
10425 {
10426 int perfmode;
10427 int output;
10428 int err;
10429
10430 err = mutex_lock_interruptible(&dytc_mutex);
10431 if (err)
10432 return err;
10433
10434 err = convert_profile_to_dytc(profile, &perfmode);
10435 if (err)
10436 goto unlock;
10437
10438 if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10439 if (profile == PLATFORM_PROFILE_BALANCED) {
10440 /*
10441 * To get back to balanced mode we need to issue a reset command.
10442 * Note we still need to disable CQL mode before hand and re-enable
10443 * it afterwards, otherwise dytc_lapmode gets reset to 0 and stays
10444 * stuck at 0 for aprox. 30 minutes.
10445 */
10446 err = dytc_cql_command(DYTC_CMD_RESET, &output);
10447 if (err)
10448 goto unlock;
10449 } else {
10450 /* Determine if we are in CQL mode. This alters the commands we do */
10451 err = dytc_cql_command(DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
10452 &output);
10453 if (err)
10454 goto unlock;
10455 }
10456 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
10457 err = dytc_command(DYTC_SET_COMMAND(DYTC_FUNCTION_PSC, perfmode, 1), &output);
10458 if (err)
10459 goto unlock;
10460
10461 /* system supports AMT, activate it when on balanced */
10462 if (dytc_capabilities & BIT(DYTC_FC_AMT))
10463 dytc_control_amt(profile == PLATFORM_PROFILE_BALANCED);
10464 }
10465 /* Success - update current profile */
10466 dytc_current_profile = profile;
10467 unlock:
10468 mutex_unlock(&dytc_mutex);
10469 return err;
10470 }
10471
dytc_profile_refresh(void)10472 static void dytc_profile_refresh(void)
10473 {
10474 enum platform_profile_option profile;
10475 int output = 0, err = 0;
10476 int perfmode, funcmode = 0;
10477
10478 mutex_lock(&dytc_mutex);
10479 if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10480 if (dytc_mmc_get_available)
10481 err = dytc_command(DYTC_CMD_MMC_GET, &output);
10482 else
10483 err = dytc_cql_command(DYTC_CMD_GET, &output);
10484 funcmode = DYTC_FUNCTION_MMC;
10485 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
10486 err = dytc_command(DYTC_CMD_GET, &output);
10487 /* Check if we are PSC mode, or have AMT enabled */
10488 funcmode = (output >> DYTC_GET_FUNCTION_BIT) & 0xF;
10489 } else { /* Unknown profile mode */
10490 err = -ENODEV;
10491 }
10492 mutex_unlock(&dytc_mutex);
10493 if (err)
10494 return;
10495
10496 perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
10497 err = convert_dytc_to_profile(funcmode, perfmode, &profile);
10498 if (!err && profile != dytc_current_profile) {
10499 dytc_current_profile = profile;
10500 platform_profile_notify();
10501 }
10502 }
10503
10504 static struct platform_profile_handler dytc_profile = {
10505 .profile_get = dytc_profile_get,
10506 .profile_set = dytc_profile_set,
10507 };
10508
tpacpi_dytc_profile_init(struct ibm_init_struct * iibm)10509 static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
10510 {
10511 int err, output;
10512
10513 /* Setup supported modes */
10514 set_bit(PLATFORM_PROFILE_LOW_POWER, dytc_profile.choices);
10515 set_bit(PLATFORM_PROFILE_BALANCED, dytc_profile.choices);
10516 set_bit(PLATFORM_PROFILE_PERFORMANCE, dytc_profile.choices);
10517
10518 err = dytc_command(DYTC_CMD_QUERY, &output);
10519 if (err)
10520 return err;
10521
10522 if (output & BIT(DYTC_QUERY_ENABLE_BIT))
10523 dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
10524
10525 /* Check DYTC is enabled and supports mode setting */
10526 if (dytc_version < 5)
10527 return -ENODEV;
10528
10529 /* Check what capabilities are supported */
10530 err = dytc_command(DYTC_CMD_FUNC_CAP, &dytc_capabilities);
10531 if (err)
10532 return err;
10533
10534 /* Check if user wants to override the profile selection */
10535 if (profile_force) {
10536 switch (profile_force) {
10537 case -1:
10538 dytc_capabilities = 0;
10539 break;
10540 case 1:
10541 dytc_capabilities = BIT(DYTC_FC_MMC);
10542 break;
10543 case 2:
10544 dytc_capabilities = BIT(DYTC_FC_PSC);
10545 break;
10546 }
10547 pr_debug("Profile selection forced: 0x%x\n", dytc_capabilities);
10548 }
10549 if (dytc_capabilities & BIT(DYTC_FC_MMC)) { /* MMC MODE */
10550 pr_debug("MMC is supported\n");
10551 /*
10552 * Check if MMC_GET functionality available
10553 * Version > 6 and return success from MMC_GET command
10554 */
10555 dytc_mmc_get_available = false;
10556 if (dytc_version >= 6) {
10557 err = dytc_command(DYTC_CMD_MMC_GET, &output);
10558 if (!err && ((output & DYTC_ERR_MASK) == DYTC_ERR_SUCCESS))
10559 dytc_mmc_get_available = true;
10560 }
10561 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { /* PSC MODE */
10562 pr_debug("PSC is supported\n");
10563 } else {
10564 dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n");
10565 return -ENODEV;
10566 }
10567
10568 dbg_printk(TPACPI_DBG_INIT,
10569 "DYTC version %d: thermal mode available\n", dytc_version);
10570
10571 /* Create platform_profile structure and register */
10572 err = platform_profile_register(&dytc_profile);
10573 /*
10574 * If for some reason platform_profiles aren't enabled
10575 * don't quit terminally.
10576 */
10577 if (err)
10578 return -ENODEV;
10579
10580 /* Ensure initial values are correct */
10581 dytc_profile_refresh();
10582
10583 /* Workaround for https://bugzilla.kernel.org/show_bug.cgi?id=216347 */
10584 if (dytc_capabilities & BIT(DYTC_FC_PSC))
10585 dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
10586
10587 return 0;
10588 }
10589
dytc_profile_exit(void)10590 static void dytc_profile_exit(void)
10591 {
10592 platform_profile_remove();
10593 }
10594
10595 static struct ibm_struct dytc_profile_driver_data = {
10596 .name = "dytc-profile",
10597 .exit = dytc_profile_exit,
10598 };
10599
10600 /*************************************************************************
10601 * Keyboard language interface
10602 */
10603
10604 struct keyboard_lang_data {
10605 const char *lang_str;
10606 int lang_code;
10607 };
10608
10609 static const struct keyboard_lang_data keyboard_lang_data[] = {
10610 {"be", 0x080c},
10611 {"cz", 0x0405},
10612 {"da", 0x0406},
10613 {"de", 0x0c07},
10614 {"en", 0x0000},
10615 {"es", 0x2c0a},
10616 {"et", 0x0425},
10617 {"fr", 0x040c},
10618 {"fr-ch", 0x100c},
10619 {"hu", 0x040e},
10620 {"it", 0x0410},
10621 {"jp", 0x0411},
10622 {"nl", 0x0413},
10623 {"nn", 0x0414},
10624 {"pl", 0x0415},
10625 {"pt", 0x0816},
10626 {"sl", 0x041b},
10627 {"sv", 0x081d},
10628 {"tr", 0x041f},
10629 };
10630
set_keyboard_lang_command(int command)10631 static int set_keyboard_lang_command(int command)
10632 {
10633 acpi_handle sskl_handle;
10634 int output;
10635
10636 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSKL", &sskl_handle))) {
10637 /* Platform doesn't support SSKL */
10638 return -ENODEV;
10639 }
10640
10641 if (!acpi_evalf(sskl_handle, &output, NULL, "dd", command))
10642 return -EIO;
10643
10644 return 0;
10645 }
10646
get_keyboard_lang(int * output)10647 static int get_keyboard_lang(int *output)
10648 {
10649 acpi_handle gskl_handle;
10650 int kbd_lang;
10651
10652 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSKL", &gskl_handle))) {
10653 /* Platform doesn't support GSKL */
10654 return -ENODEV;
10655 }
10656
10657 if (!acpi_evalf(gskl_handle, &kbd_lang, NULL, "dd", 0x02000000))
10658 return -EIO;
10659
10660 /*
10661 * METHOD_ERR gets returned on devices where there are no special (e.g. '=',
10662 * '(' and ')') keys which use layout dependent key-press emulation.
10663 */
10664 if (kbd_lang & METHOD_ERR)
10665 return -ENODEV;
10666
10667 *output = kbd_lang;
10668
10669 return 0;
10670 }
10671
10672 /* sysfs keyboard language entry */
keyboard_lang_show(struct device * dev,struct device_attribute * attr,char * buf)10673 static ssize_t keyboard_lang_show(struct device *dev,
10674 struct device_attribute *attr,
10675 char *buf)
10676 {
10677 int output, err, i, len = 0;
10678
10679 err = get_keyboard_lang(&output);
10680 if (err)
10681 return err;
10682
10683 for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) {
10684 if (i)
10685 len += sysfs_emit_at(buf, len, "%s", " ");
10686
10687 if (output == keyboard_lang_data[i].lang_code) {
10688 len += sysfs_emit_at(buf, len, "[%s]", keyboard_lang_data[i].lang_str);
10689 } else {
10690 len += sysfs_emit_at(buf, len, "%s", keyboard_lang_data[i].lang_str);
10691 }
10692 }
10693 len += sysfs_emit_at(buf, len, "\n");
10694
10695 return len;
10696 }
10697
keyboard_lang_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)10698 static ssize_t keyboard_lang_store(struct device *dev,
10699 struct device_attribute *attr,
10700 const char *buf, size_t count)
10701 {
10702 int err, i;
10703 bool lang_found = false;
10704 int lang_code = 0;
10705
10706 for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) {
10707 if (sysfs_streq(buf, keyboard_lang_data[i].lang_str)) {
10708 lang_code = keyboard_lang_data[i].lang_code;
10709 lang_found = true;
10710 break;
10711 }
10712 }
10713
10714 if (lang_found) {
10715 lang_code = lang_code | 1 << 24;
10716
10717 /* Set language code */
10718 err = set_keyboard_lang_command(lang_code);
10719 if (err)
10720 return err;
10721 } else {
10722 dev_err(&tpacpi_pdev->dev, "Unknown Keyboard language. Ignoring\n");
10723 return -EINVAL;
10724 }
10725
10726 tpacpi_disclose_usertask(attr->attr.name,
10727 "keyboard language is set to %s\n", buf);
10728
10729 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "keyboard_lang");
10730
10731 return count;
10732 }
10733 static DEVICE_ATTR_RW(keyboard_lang);
10734
10735 static struct attribute *kbdlang_attributes[] = {
10736 &dev_attr_keyboard_lang.attr,
10737 NULL
10738 };
10739
kbdlang_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10740 static umode_t kbdlang_attr_is_visible(struct kobject *kobj,
10741 struct attribute *attr, int n)
10742 {
10743 return tp_features.kbd_lang ? attr->mode : 0;
10744 }
10745
10746 static const struct attribute_group kbdlang_attr_group = {
10747 .is_visible = kbdlang_attr_is_visible,
10748 .attrs = kbdlang_attributes,
10749 };
10750
tpacpi_kbdlang_init(struct ibm_init_struct * iibm)10751 static int tpacpi_kbdlang_init(struct ibm_init_struct *iibm)
10752 {
10753 int err, output;
10754
10755 err = get_keyboard_lang(&output);
10756 tp_features.kbd_lang = !err;
10757 return err;
10758 }
10759
10760 static struct ibm_struct kbdlang_driver_data = {
10761 .name = "kbdlang",
10762 };
10763
10764 /*************************************************************************
10765 * DPRC(Dynamic Power Reduction Control) subdriver, for the Lenovo WWAN
10766 * and WLAN feature.
10767 */
10768 #define DPRC_GET_WWAN_ANTENNA_TYPE 0x40000
10769 #define DPRC_WWAN_ANTENNA_TYPE_A_BIT BIT(4)
10770 #define DPRC_WWAN_ANTENNA_TYPE_B_BIT BIT(8)
10771 static bool has_antennatype;
10772 static int wwan_antennatype;
10773
dprc_command(int command,int * output)10774 static int dprc_command(int command, int *output)
10775 {
10776 acpi_handle dprc_handle;
10777
10778 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DPRC", &dprc_handle))) {
10779 /* Platform doesn't support DPRC */
10780 return -ENODEV;
10781 }
10782
10783 if (!acpi_evalf(dprc_handle, output, NULL, "dd", command))
10784 return -EIO;
10785
10786 /*
10787 * METHOD_ERR gets returned on devices where few commands are not supported
10788 * for example command to get WWAN Antenna type command is not supported on
10789 * some devices.
10790 */
10791 if (*output & METHOD_ERR)
10792 return -ENODEV;
10793
10794 return 0;
10795 }
10796
get_wwan_antenna(int * wwan_antennatype)10797 static int get_wwan_antenna(int *wwan_antennatype)
10798 {
10799 int output, err;
10800
10801 /* Get current Antenna type */
10802 err = dprc_command(DPRC_GET_WWAN_ANTENNA_TYPE, &output);
10803 if (err)
10804 return err;
10805
10806 if (output & DPRC_WWAN_ANTENNA_TYPE_A_BIT)
10807 *wwan_antennatype = 1;
10808 else if (output & DPRC_WWAN_ANTENNA_TYPE_B_BIT)
10809 *wwan_antennatype = 2;
10810 else
10811 return -ENODEV;
10812
10813 return 0;
10814 }
10815
10816 /* sysfs wwan antenna type entry */
wwan_antenna_type_show(struct device * dev,struct device_attribute * attr,char * buf)10817 static ssize_t wwan_antenna_type_show(struct device *dev,
10818 struct device_attribute *attr,
10819 char *buf)
10820 {
10821 switch (wwan_antennatype) {
10822 case 1:
10823 return sysfs_emit(buf, "type a\n");
10824 case 2:
10825 return sysfs_emit(buf, "type b\n");
10826 default:
10827 return -ENODATA;
10828 }
10829 }
10830 static DEVICE_ATTR_RO(wwan_antenna_type);
10831
10832 static struct attribute *dprc_attributes[] = {
10833 &dev_attr_wwan_antenna_type.attr,
10834 NULL
10835 };
10836
dprc_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10837 static umode_t dprc_attr_is_visible(struct kobject *kobj,
10838 struct attribute *attr, int n)
10839 {
10840 return has_antennatype ? attr->mode : 0;
10841 }
10842
10843 static const struct attribute_group dprc_attr_group = {
10844 .is_visible = dprc_attr_is_visible,
10845 .attrs = dprc_attributes,
10846 };
10847
tpacpi_dprc_init(struct ibm_init_struct * iibm)10848 static int tpacpi_dprc_init(struct ibm_init_struct *iibm)
10849 {
10850 int err;
10851
10852 err = get_wwan_antenna(&wwan_antennatype);
10853 if (err)
10854 return err;
10855
10856 has_antennatype = true;
10857 return 0;
10858 }
10859
10860 static struct ibm_struct dprc_driver_data = {
10861 .name = "dprc",
10862 };
10863
10864 /* --------------------------------------------------------------------- */
10865
10866 static struct attribute *tpacpi_driver_attributes[] = {
10867 &driver_attr_debug_level.attr,
10868 &driver_attr_version.attr,
10869 &driver_attr_interface_version.attr,
10870 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10871 &driver_attr_wlsw_emulstate.attr,
10872 &driver_attr_bluetooth_emulstate.attr,
10873 &driver_attr_wwan_emulstate.attr,
10874 &driver_attr_uwb_emulstate.attr,
10875 #endif
10876 NULL
10877 };
10878
10879 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
tpacpi_attr_is_visible(struct kobject * kobj,struct attribute * attr,int n)10880 static umode_t tpacpi_attr_is_visible(struct kobject *kobj,
10881 struct attribute *attr, int n)
10882 {
10883 if (attr == &driver_attr_wlsw_emulstate.attr) {
10884 if (!dbg_wlswemul)
10885 return 0;
10886 } else if (attr == &driver_attr_bluetooth_emulstate.attr) {
10887 if (!dbg_bluetoothemul)
10888 return 0;
10889 } else if (attr == &driver_attr_wwan_emulstate.attr) {
10890 if (!dbg_wwanemul)
10891 return 0;
10892 } else if (attr == &driver_attr_uwb_emulstate.attr) {
10893 if (!dbg_uwbemul)
10894 return 0;
10895 }
10896
10897 return attr->mode;
10898 }
10899 #endif
10900
10901 static const struct attribute_group tpacpi_driver_attr_group = {
10902 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10903 .is_visible = tpacpi_attr_is_visible,
10904 #endif
10905 .attrs = tpacpi_driver_attributes,
10906 };
10907
10908 static const struct attribute_group *tpacpi_driver_groups[] = {
10909 &tpacpi_driver_attr_group,
10910 NULL,
10911 };
10912
10913 static const struct attribute_group *tpacpi_groups[] = {
10914 &adaptive_kbd_attr_group,
10915 &hotkey_attr_group,
10916 &bluetooth_attr_group,
10917 &wan_attr_group,
10918 &cmos_attr_group,
10919 &proxsensor_attr_group,
10920 &kbdlang_attr_group,
10921 &dprc_attr_group,
10922 NULL,
10923 };
10924
10925 static const struct attribute_group *tpacpi_hwmon_groups[] = {
10926 &thermal_attr_group,
10927 &temp_label_attr_group,
10928 &fan_attr_group,
10929 NULL,
10930 };
10931
10932 static const struct attribute_group *tpacpi_hwmon_driver_groups[] = {
10933 &fan_driver_attr_group,
10934 NULL,
10935 };
10936
10937 /****************************************************************************
10938 ****************************************************************************
10939 *
10940 * Platform drivers
10941 *
10942 ****************************************************************************
10943 ****************************************************************************/
10944
10945 static struct platform_driver tpacpi_pdriver = {
10946 .driver = {
10947 .name = TPACPI_DRVR_NAME,
10948 .pm = &tpacpi_pm,
10949 .groups = tpacpi_driver_groups,
10950 .dev_groups = tpacpi_groups,
10951 },
10952 .shutdown = tpacpi_shutdown_handler,
10953 };
10954
10955 static struct platform_driver tpacpi_hwmon_pdriver = {
10956 .driver = {
10957 .name = TPACPI_HWMON_DRVR_NAME,
10958 .groups = tpacpi_hwmon_driver_groups,
10959 },
10960 };
10961
10962 /****************************************************************************
10963 ****************************************************************************
10964 *
10965 * Infrastructure
10966 *
10967 ****************************************************************************
10968 ****************************************************************************/
10969
10970 /*
10971 * HKEY event callout for other subdrivers go here
10972 * (yes, it is ugly, but it is quick, safe, and gets the job done
10973 */
tpacpi_driver_event(const unsigned int hkey_event)10974 static void tpacpi_driver_event(const unsigned int hkey_event)
10975 {
10976 if (ibm_backlight_device) {
10977 switch (hkey_event) {
10978 case TP_HKEY_EV_BRGHT_UP:
10979 case TP_HKEY_EV_BRGHT_DOWN:
10980 tpacpi_brightness_notify_change();
10981 }
10982 }
10983 if (alsa_card) {
10984 switch (hkey_event) {
10985 case TP_HKEY_EV_VOL_UP:
10986 case TP_HKEY_EV_VOL_DOWN:
10987 case TP_HKEY_EV_VOL_MUTE:
10988 volume_alsa_notify_change();
10989 }
10990 }
10991 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
10992 enum led_brightness brightness;
10993
10994 mutex_lock(&kbdlight_mutex);
10995
10996 /*
10997 * Check the brightness actually changed, setting the brightness
10998 * through kbdlight_set_level() also triggers this event.
10999 */
11000 brightness = kbdlight_sysfs_get(NULL);
11001 if (kbdlight_brightness != brightness) {
11002 kbdlight_brightness = brightness;
11003 led_classdev_notify_brightness_hw_changed(
11004 &tpacpi_led_kbdlight.led_classdev, brightness);
11005 }
11006
11007 mutex_unlock(&kbdlight_mutex);
11008 }
11009
11010 if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED) {
11011 lapsensor_refresh();
11012 /* If we are already accessing DYTC then skip dytc update */
11013 if (!atomic_add_unless(&dytc_ignore_event, -1, 0))
11014 dytc_profile_refresh();
11015 }
11016
11017 if (lcdshadow_dev && hkey_event == TP_HKEY_EV_PRIVACYGUARD_TOGGLE) {
11018 enum drm_privacy_screen_status old_hw_state;
11019 bool changed;
11020
11021 mutex_lock(&lcdshadow_dev->lock);
11022 old_hw_state = lcdshadow_dev->hw_state;
11023 lcdshadow_get_hw_state(lcdshadow_dev);
11024 changed = lcdshadow_dev->hw_state != old_hw_state;
11025 mutex_unlock(&lcdshadow_dev->lock);
11026
11027 if (changed)
11028 drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
11029 }
11030 if (hkey_event == TP_HKEY_EV_AMT_TOGGLE) {
11031 /* If we're enabling AMT we need to force balanced mode */
11032 if (!dytc_amt_active)
11033 /* This will also set AMT mode enabled */
11034 dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
11035 else
11036 dytc_control_amt(!dytc_amt_active);
11037 }
11038
11039 }
11040
hotkey_driver_event(const unsigned int scancode)11041 static void hotkey_driver_event(const unsigned int scancode)
11042 {
11043 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
11044 }
11045
11046 /* --------------------------------------------------------------------- */
11047
11048 /* /proc support */
11049 static struct proc_dir_entry *proc_dir;
11050
11051 /*
11052 * Module and infrastructure proble, init and exit handling
11053 */
11054
11055 static bool force_load;
11056
11057 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
str_supported(int is_supported)11058 static const char * __init str_supported(int is_supported)
11059 {
11060 static char text_unsupported[] __initdata = "not supported";
11061
11062 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
11063 }
11064 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
11065
ibm_exit(struct ibm_struct * ibm)11066 static void ibm_exit(struct ibm_struct *ibm)
11067 {
11068 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
11069
11070 list_del_init(&ibm->all_drivers);
11071
11072 if (ibm->flags.acpi_notify_installed) {
11073 dbg_printk(TPACPI_DBG_EXIT,
11074 "%s: acpi_remove_notify_handler\n", ibm->name);
11075 BUG_ON(!ibm->acpi);
11076 acpi_remove_notify_handler(*ibm->acpi->handle,
11077 ibm->acpi->type,
11078 dispatch_acpi_notify);
11079 ibm->flags.acpi_notify_installed = 0;
11080 }
11081
11082 if (ibm->flags.proc_created) {
11083 dbg_printk(TPACPI_DBG_EXIT,
11084 "%s: remove_proc_entry\n", ibm->name);
11085 remove_proc_entry(ibm->name, proc_dir);
11086 ibm->flags.proc_created = 0;
11087 }
11088
11089 if (ibm->flags.acpi_driver_registered) {
11090 dbg_printk(TPACPI_DBG_EXIT,
11091 "%s: acpi_bus_unregister_driver\n", ibm->name);
11092 BUG_ON(!ibm->acpi);
11093 acpi_bus_unregister_driver(ibm->acpi->driver);
11094 kfree(ibm->acpi->driver);
11095 ibm->acpi->driver = NULL;
11096 ibm->flags.acpi_driver_registered = 0;
11097 }
11098
11099 if (ibm->flags.init_called && ibm->exit) {
11100 ibm->exit();
11101 ibm->flags.init_called = 0;
11102 }
11103
11104 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
11105 }
11106
ibm_init(struct ibm_init_struct * iibm)11107 static int __init ibm_init(struct ibm_init_struct *iibm)
11108 {
11109 int ret;
11110 struct ibm_struct *ibm = iibm->data;
11111 struct proc_dir_entry *entry;
11112
11113 BUG_ON(ibm == NULL);
11114
11115 INIT_LIST_HEAD(&ibm->all_drivers);
11116
11117 if (ibm->flags.experimental && !experimental)
11118 return 0;
11119
11120 dbg_printk(TPACPI_DBG_INIT,
11121 "probing for %s\n", ibm->name);
11122
11123 if (iibm->init) {
11124 ret = iibm->init(iibm);
11125 if (ret > 0 || ret == -ENODEV)
11126 return 0; /* subdriver functionality not available */
11127 if (ret)
11128 return ret;
11129
11130 ibm->flags.init_called = 1;
11131 }
11132
11133 if (ibm->acpi) {
11134 if (ibm->acpi->hid) {
11135 ret = register_tpacpi_subdriver(ibm);
11136 if (ret)
11137 goto err_out;
11138 }
11139
11140 if (ibm->acpi->notify) {
11141 ret = setup_acpi_notify(ibm);
11142 if (ret == -ENODEV) {
11143 pr_notice("disabling subdriver %s\n",
11144 ibm->name);
11145 ret = 0;
11146 goto err_out;
11147 }
11148 if (ret < 0)
11149 goto err_out;
11150 }
11151 }
11152
11153 dbg_printk(TPACPI_DBG_INIT,
11154 "%s installed\n", ibm->name);
11155
11156 if (ibm->read) {
11157 umode_t mode = iibm->base_procfs_mode;
11158
11159 if (!mode)
11160 mode = S_IRUGO;
11161 if (ibm->write)
11162 mode |= S_IWUSR;
11163 entry = proc_create_data(ibm->name, mode, proc_dir,
11164 &dispatch_proc_ops, ibm);
11165 if (!entry) {
11166 pr_err("unable to create proc entry %s\n", ibm->name);
11167 ret = -ENODEV;
11168 goto err_out;
11169 }
11170 ibm->flags.proc_created = 1;
11171 }
11172
11173 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
11174
11175 return 0;
11176
11177 err_out:
11178 dbg_printk(TPACPI_DBG_INIT,
11179 "%s: at error exit path with result %d\n",
11180 ibm->name, ret);
11181
11182 ibm_exit(ibm);
11183 return (ret < 0) ? ret : 0;
11184 }
11185
11186 /* Probing */
11187
tpacpi_parse_fw_id(const char * const s,u32 * model,u16 * release)11188 static char __init tpacpi_parse_fw_id(const char * const s,
11189 u32 *model, u16 *release)
11190 {
11191 int i;
11192
11193 if (!s || strlen(s) < 8)
11194 goto invalid;
11195
11196 for (i = 0; i < 8; i++)
11197 if (!((s[i] >= '0' && s[i] <= '9') ||
11198 (s[i] >= 'A' && s[i] <= 'Z')))
11199 goto invalid;
11200
11201 /*
11202 * Most models: xxyTkkWW (#.##c)
11203 * Ancient 570/600 and -SL lacks (#.##c)
11204 */
11205 if (s[3] == 'T' || s[3] == 'N') {
11206 *model = TPID(s[0], s[1]);
11207 *release = TPVER(s[4], s[5]);
11208 return s[2];
11209
11210 /* New models: xxxyTkkW (#.##c); T550 and some others */
11211 } else if (s[4] == 'T' || s[4] == 'N') {
11212 *model = TPID3(s[0], s[1], s[2]);
11213 *release = TPVER(s[5], s[6]);
11214 return s[3];
11215 }
11216
11217 invalid:
11218 return '\0';
11219 }
11220
find_new_ec_fwstr(const struct dmi_header * dm,void * private)11221 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
11222 {
11223 char *ec_fw_string = (char *) private;
11224 const char *dmi_data = (const char *)dm;
11225 /*
11226 * ThinkPad Embedded Controller Program Table on newer models
11227 *
11228 * Offset | Name | Width | Description
11229 * ----------------------------------------------------
11230 * 0x00 | Type | BYTE | 0x8C
11231 * 0x01 | Length | BYTE |
11232 * 0x02 | Handle | WORD | Varies
11233 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO"
11234 * 0x0A | OEM struct offset | BYTE | 0x0B
11235 * 0x0B | OEM struct number | BYTE | 0x07, for this structure
11236 * 0x0C | OEM struct revision | BYTE | 0x01, for this format
11237 * 0x0D | ECP version ID | STR ID |
11238 * 0x0E | ECP release date | STR ID |
11239 */
11240
11241 /* Return if data structure not match */
11242 if (dm->type != 140 || dm->length < 0x0F ||
11243 memcmp(dmi_data + 4, "LENOVO", 6) != 0 ||
11244 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 ||
11245 dmi_data[0x0C] != 0x01)
11246 return;
11247
11248 /* fwstr is the first 8byte string */
11249 strncpy(ec_fw_string, dmi_data + 0x0F, 8);
11250 }
11251
11252 /* returns 0 - probe ok, or < 0 - probe error.
11253 * Probe ok doesn't mean thinkpad found.
11254 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
get_thinkpad_model_data(struct thinkpad_id_data * tp)11255 static int __must_check __init get_thinkpad_model_data(
11256 struct thinkpad_id_data *tp)
11257 {
11258 const struct dmi_device *dev = NULL;
11259 char ec_fw_string[18] = {0};
11260 char const *s;
11261 char t;
11262
11263 if (!tp)
11264 return -EINVAL;
11265
11266 memset(tp, 0, sizeof(*tp));
11267
11268 if (dmi_name_in_vendors("IBM"))
11269 tp->vendor = PCI_VENDOR_ID_IBM;
11270 else if (dmi_name_in_vendors("LENOVO"))
11271 tp->vendor = PCI_VENDOR_ID_LENOVO;
11272 else
11273 return 0;
11274
11275 s = dmi_get_system_info(DMI_BIOS_VERSION);
11276 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
11277 if (s && !tp->bios_version_str)
11278 return -ENOMEM;
11279
11280 /* Really ancient ThinkPad 240X will fail this, which is fine */
11281 t = tpacpi_parse_fw_id(tp->bios_version_str,
11282 &tp->bios_model, &tp->bios_release);
11283 if (t != 'E' && t != 'C')
11284 return 0;
11285
11286 /*
11287 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
11288 * X32 or newer, all Z series; Some models must have an
11289 * up-to-date BIOS or they will not be detected.
11290 *
11291 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
11292 */
11293 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
11294 if (sscanf(dev->name,
11295 "IBM ThinkPad Embedded Controller -[%17c",
11296 ec_fw_string) == 1) {
11297 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
11298 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
11299 break;
11300 }
11301 }
11302
11303 /* Newer ThinkPads have different EC program info table */
11304 if (!ec_fw_string[0])
11305 dmi_walk(find_new_ec_fwstr, &ec_fw_string);
11306
11307 if (ec_fw_string[0]) {
11308 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
11309 if (!tp->ec_version_str)
11310 return -ENOMEM;
11311
11312 t = tpacpi_parse_fw_id(ec_fw_string,
11313 &tp->ec_model, &tp->ec_release);
11314 if (t != 'H') {
11315 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
11316 ec_fw_string);
11317 pr_notice("please report this to %s\n", TPACPI_MAIL);
11318 }
11319 }
11320
11321 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
11322 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
11323 tp->model_str = kstrdup(s, GFP_KERNEL);
11324 if (!tp->model_str)
11325 return -ENOMEM;
11326 } else {
11327 s = dmi_get_system_info(DMI_BIOS_VENDOR);
11328 if (s && !(strncasecmp(s, "Lenovo", 6))) {
11329 tp->model_str = kstrdup(s, GFP_KERNEL);
11330 if (!tp->model_str)
11331 return -ENOMEM;
11332 }
11333 }
11334
11335 s = dmi_get_system_info(DMI_PRODUCT_NAME);
11336 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
11337 if (s && !tp->nummodel_str)
11338 return -ENOMEM;
11339
11340 return 0;
11341 }
11342
probe_for_thinkpad(void)11343 static int __init probe_for_thinkpad(void)
11344 {
11345 int is_thinkpad;
11346
11347 if (acpi_disabled)
11348 return -ENODEV;
11349
11350 /* It would be dangerous to run the driver in this case */
11351 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
11352 return -ENODEV;
11353
11354 /*
11355 * Non-ancient models have better DMI tagging, but very old models
11356 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
11357 */
11358 is_thinkpad = (thinkpad_id.model_str != NULL) ||
11359 (thinkpad_id.ec_model != 0) ||
11360 tpacpi_is_fw_known();
11361
11362 /* The EC handler is required */
11363 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
11364 if (!ec_handle) {
11365 if (is_thinkpad)
11366 pr_err("Not yet supported ThinkPad detected!\n");
11367 return -ENODEV;
11368 }
11369
11370 if (!is_thinkpad && !force_load)
11371 return -ENODEV;
11372
11373 return 0;
11374 }
11375
thinkpad_acpi_init_banner(void)11376 static void __init thinkpad_acpi_init_banner(void)
11377 {
11378 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
11379 pr_info("%s\n", TPACPI_URL);
11380
11381 pr_info("ThinkPad BIOS %s, EC %s\n",
11382 (thinkpad_id.bios_version_str) ?
11383 thinkpad_id.bios_version_str : "unknown",
11384 (thinkpad_id.ec_version_str) ?
11385 thinkpad_id.ec_version_str : "unknown");
11386
11387 BUG_ON(!thinkpad_id.vendor);
11388
11389 if (thinkpad_id.model_str)
11390 pr_info("%s %s, model %s\n",
11391 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
11392 "IBM" : ((thinkpad_id.vendor ==
11393 PCI_VENDOR_ID_LENOVO) ?
11394 "Lenovo" : "Unknown vendor"),
11395 thinkpad_id.model_str,
11396 (thinkpad_id.nummodel_str) ?
11397 thinkpad_id.nummodel_str : "unknown");
11398 }
11399
11400 /* Module init, exit, parameters */
11401
11402 static struct ibm_init_struct ibms_init[] __initdata = {
11403 {
11404 .data = &thinkpad_acpi_driver_data,
11405 },
11406 {
11407 .init = hotkey_init,
11408 .data = &hotkey_driver_data,
11409 },
11410 {
11411 .init = bluetooth_init,
11412 .data = &bluetooth_driver_data,
11413 },
11414 {
11415 .init = wan_init,
11416 .data = &wan_driver_data,
11417 },
11418 {
11419 .init = uwb_init,
11420 .data = &uwb_driver_data,
11421 },
11422 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
11423 {
11424 .init = video_init,
11425 .base_procfs_mode = S_IRUSR,
11426 .data = &video_driver_data,
11427 },
11428 #endif
11429 {
11430 .init = kbdlight_init,
11431 .data = &kbdlight_driver_data,
11432 },
11433 {
11434 .init = light_init,
11435 .data = &light_driver_data,
11436 },
11437 {
11438 .init = cmos_init,
11439 .data = &cmos_driver_data,
11440 },
11441 {
11442 .init = led_init,
11443 .data = &led_driver_data,
11444 },
11445 {
11446 .init = beep_init,
11447 .data = &beep_driver_data,
11448 },
11449 {
11450 .init = thermal_init,
11451 .data = &thermal_driver_data,
11452 },
11453 {
11454 .init = brightness_init,
11455 .data = &brightness_driver_data,
11456 },
11457 {
11458 .init = volume_init,
11459 .data = &volume_driver_data,
11460 },
11461 {
11462 .init = fan_init,
11463 .data = &fan_driver_data,
11464 },
11465 {
11466 .init = mute_led_init,
11467 .data = &mute_led_driver_data,
11468 },
11469 {
11470 .init = tpacpi_battery_init,
11471 .data = &battery_driver_data,
11472 },
11473 {
11474 .init = tpacpi_lcdshadow_init,
11475 .data = &lcdshadow_driver_data,
11476 },
11477 {
11478 .init = tpacpi_proxsensor_init,
11479 .data = &proxsensor_driver_data,
11480 },
11481 {
11482 .init = tpacpi_dytc_profile_init,
11483 .data = &dytc_profile_driver_data,
11484 },
11485 {
11486 .init = tpacpi_kbdlang_init,
11487 .data = &kbdlang_driver_data,
11488 },
11489 {
11490 .init = tpacpi_dprc_init,
11491 .data = &dprc_driver_data,
11492 },
11493 };
11494
set_ibm_param(const char * val,const struct kernel_param * kp)11495 static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
11496 {
11497 unsigned int i;
11498 struct ibm_struct *ibm;
11499
11500 if (!kp || !kp->name || !val)
11501 return -EINVAL;
11502
11503 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
11504 ibm = ibms_init[i].data;
11505 if (!ibm || !ibm->name)
11506 continue;
11507
11508 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
11509 if (strlen(val) > sizeof(ibms_init[i].param) - 1)
11510 return -ENOSPC;
11511 strcpy(ibms_init[i].param, val);
11512 return 0;
11513 }
11514 }
11515
11516 return -EINVAL;
11517 }
11518
11519 module_param(experimental, int, 0444);
11520 MODULE_PARM_DESC(experimental,
11521 "Enables experimental features when non-zero");
11522
11523 module_param_named(debug, dbg_level, uint, 0);
11524 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
11525
11526 module_param(force_load, bool, 0444);
11527 MODULE_PARM_DESC(force_load,
11528 "Attempts to load the driver even on a mis-identified ThinkPad when true");
11529
11530 module_param_named(fan_control, fan_control_allowed, bool, 0444);
11531 MODULE_PARM_DESC(fan_control,
11532 "Enables setting fan parameters features when true");
11533
11534 module_param_named(brightness_mode, brightness_mode, uint, 0444);
11535 MODULE_PARM_DESC(brightness_mode,
11536 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
11537
11538 module_param(brightness_enable, uint, 0444);
11539 MODULE_PARM_DESC(brightness_enable,
11540 "Enables backlight control when 1, disables when 0");
11541
11542 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
11543 module_param_named(volume_mode, volume_mode, uint, 0444);
11544 MODULE_PARM_DESC(volume_mode,
11545 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
11546
11547 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
11548 MODULE_PARM_DESC(volume_capabilities,
11549 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only");
11550
11551 module_param_named(volume_control, volume_control_allowed, bool, 0444);
11552 MODULE_PARM_DESC(volume_control,
11553 "Enables software override for the console audio control when true");
11554
11555 module_param_named(software_mute, software_mute_requested, bool, 0444);
11556 MODULE_PARM_DESC(software_mute,
11557 "Request full software mute control");
11558
11559 /* ALSA module API parameters */
11560 module_param_named(index, alsa_index, int, 0444);
11561 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
11562 module_param_named(id, alsa_id, charp, 0444);
11563 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
11564 module_param_named(enable, alsa_enable, bool, 0444);
11565 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
11566 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
11567
11568 /* The module parameter can't be read back, that's why 0 is used here */
11569 #define TPACPI_PARAM(feature) \
11570 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
11571 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
11572
11573 TPACPI_PARAM(hotkey);
11574 TPACPI_PARAM(bluetooth);
11575 TPACPI_PARAM(video);
11576 TPACPI_PARAM(light);
11577 TPACPI_PARAM(cmos);
11578 TPACPI_PARAM(led);
11579 TPACPI_PARAM(beep);
11580 TPACPI_PARAM(brightness);
11581 TPACPI_PARAM(volume);
11582 TPACPI_PARAM(fan);
11583
11584 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
11585 module_param(dbg_wlswemul, uint, 0444);
11586 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
11587 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
11588 MODULE_PARM_DESC(wlsw_state,
11589 "Initial state of the emulated WLSW switch");
11590
11591 module_param(dbg_bluetoothemul, uint, 0444);
11592 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
11593 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
11594 MODULE_PARM_DESC(bluetooth_state,
11595 "Initial state of the emulated bluetooth switch");
11596
11597 module_param(dbg_wwanemul, uint, 0444);
11598 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
11599 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
11600 MODULE_PARM_DESC(wwan_state,
11601 "Initial state of the emulated WWAN switch");
11602
11603 module_param(dbg_uwbemul, uint, 0444);
11604 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
11605 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
11606 MODULE_PARM_DESC(uwb_state,
11607 "Initial state of the emulated UWB switch");
11608 #endif
11609
11610 module_param(profile_force, int, 0444);
11611 MODULE_PARM_DESC(profile_force, "Force profile mode. -1=off, 1=MMC, 2=PSC");
11612
thinkpad_acpi_module_exit(void)11613 static void thinkpad_acpi_module_exit(void)
11614 {
11615 struct ibm_struct *ibm, *itmp;
11616
11617 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
11618
11619 if (tpacpi_hwmon)
11620 hwmon_device_unregister(tpacpi_hwmon);
11621 if (tp_features.sensors_pdrv_registered)
11622 platform_driver_unregister(&tpacpi_hwmon_pdriver);
11623 if (tp_features.platform_drv_registered)
11624 platform_driver_unregister(&tpacpi_pdriver);
11625
11626 list_for_each_entry_safe_reverse(ibm, itmp,
11627 &tpacpi_all_drivers,
11628 all_drivers) {
11629 ibm_exit(ibm);
11630 }
11631
11632 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
11633
11634 if (tpacpi_inputdev) {
11635 if (tp_features.input_device_registered)
11636 input_unregister_device(tpacpi_inputdev);
11637 else
11638 input_free_device(tpacpi_inputdev);
11639 kfree(hotkey_keycode_map);
11640 }
11641
11642 if (tpacpi_sensors_pdev)
11643 platform_device_unregister(tpacpi_sensors_pdev);
11644 if (tpacpi_pdev)
11645 platform_device_unregister(tpacpi_pdev);
11646 if (proc_dir)
11647 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
11648 if (tpacpi_wq)
11649 destroy_workqueue(tpacpi_wq);
11650
11651 kfree(thinkpad_id.bios_version_str);
11652 kfree(thinkpad_id.ec_version_str);
11653 kfree(thinkpad_id.model_str);
11654 kfree(thinkpad_id.nummodel_str);
11655 }
11656
11657
thinkpad_acpi_module_init(void)11658 static int __init thinkpad_acpi_module_init(void)
11659 {
11660 const struct dmi_system_id *dmi_id;
11661 int ret, i;
11662 acpi_object_type obj_type;
11663
11664 tpacpi_lifecycle = TPACPI_LIFE_INIT;
11665
11666 /* Driver-level probe */
11667
11668 ret = get_thinkpad_model_data(&thinkpad_id);
11669 if (ret) {
11670 pr_err("unable to get DMI data: %d\n", ret);
11671 thinkpad_acpi_module_exit();
11672 return ret;
11673 }
11674 ret = probe_for_thinkpad();
11675 if (ret) {
11676 thinkpad_acpi_module_exit();
11677 return ret;
11678 }
11679
11680 /* Driver initialization */
11681
11682 thinkpad_acpi_init_banner();
11683 tpacpi_check_outdated_fw();
11684
11685 TPACPI_ACPIHANDLE_INIT(ecrd);
11686 TPACPI_ACPIHANDLE_INIT(ecwr);
11687
11688 /*
11689 * Quirk: in some models (e.g. X380 Yoga), an object named ECRD
11690 * exists, but it is a register, not a method.
11691 */
11692 if (ecrd_handle) {
11693 acpi_get_type(ecrd_handle, &obj_type);
11694 if (obj_type != ACPI_TYPE_METHOD)
11695 ecrd_handle = NULL;
11696 }
11697 if (ecwr_handle) {
11698 acpi_get_type(ecwr_handle, &obj_type);
11699 if (obj_type != ACPI_TYPE_METHOD)
11700 ecwr_handle = NULL;
11701 }
11702
11703 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
11704 if (!tpacpi_wq) {
11705 thinkpad_acpi_module_exit();
11706 return -ENOMEM;
11707 }
11708
11709 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
11710 if (!proc_dir) {
11711 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
11712 thinkpad_acpi_module_exit();
11713 return -ENODEV;
11714 }
11715
11716 dmi_id = dmi_first_match(fwbug_list);
11717 if (dmi_id)
11718 tp_features.quirks = dmi_id->driver_data;
11719
11720 /* Device initialization */
11721 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, PLATFORM_DEVID_NONE,
11722 NULL, 0);
11723 if (IS_ERR(tpacpi_pdev)) {
11724 ret = PTR_ERR(tpacpi_pdev);
11725 tpacpi_pdev = NULL;
11726 pr_err("unable to register platform device\n");
11727 thinkpad_acpi_module_exit();
11728 return ret;
11729 }
11730 tpacpi_sensors_pdev = platform_device_register_simple(
11731 TPACPI_HWMON_DRVR_NAME,
11732 PLATFORM_DEVID_NONE, NULL, 0);
11733 if (IS_ERR(tpacpi_sensors_pdev)) {
11734 ret = PTR_ERR(tpacpi_sensors_pdev);
11735 tpacpi_sensors_pdev = NULL;
11736 pr_err("unable to register hwmon platform device\n");
11737 thinkpad_acpi_module_exit();
11738 return ret;
11739 }
11740
11741 mutex_init(&tpacpi_inputdev_send_mutex);
11742 tpacpi_inputdev = input_allocate_device();
11743 if (!tpacpi_inputdev) {
11744 thinkpad_acpi_module_exit();
11745 return -ENOMEM;
11746 } else {
11747 /* Prepare input device, but don't register */
11748 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
11749 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
11750 tpacpi_inputdev->id.bustype = BUS_HOST;
11751 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
11752 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
11753 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
11754 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
11755 }
11756
11757 /* Init subdriver dependencies */
11758 tpacpi_detect_brightness_capabilities();
11759
11760 /* Init subdrivers */
11761 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
11762 ret = ibm_init(&ibms_init[i]);
11763 if (ret >= 0 && *ibms_init[i].param)
11764 ret = ibms_init[i].data->write(ibms_init[i].param);
11765 if (ret < 0) {
11766 thinkpad_acpi_module_exit();
11767 return ret;
11768 }
11769 }
11770
11771 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
11772
11773 ret = platform_driver_register(&tpacpi_pdriver);
11774 if (ret) {
11775 pr_err("unable to register main platform driver\n");
11776 thinkpad_acpi_module_exit();
11777 return ret;
11778 }
11779 tp_features.platform_drv_registered = 1;
11780
11781 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
11782 if (ret) {
11783 pr_err("unable to register hwmon platform driver\n");
11784 thinkpad_acpi_module_exit();
11785 return ret;
11786 }
11787 tp_features.sensors_pdrv_registered = 1;
11788
11789 tpacpi_hwmon = hwmon_device_register_with_groups(
11790 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, tpacpi_hwmon_groups);
11791 if (IS_ERR(tpacpi_hwmon)) {
11792 ret = PTR_ERR(tpacpi_hwmon);
11793 tpacpi_hwmon = NULL;
11794 pr_err("unable to register hwmon device\n");
11795 thinkpad_acpi_module_exit();
11796 return ret;
11797 }
11798
11799 ret = input_register_device(tpacpi_inputdev);
11800 if (ret < 0) {
11801 pr_err("unable to register input device\n");
11802 thinkpad_acpi_module_exit();
11803 return ret;
11804 } else {
11805 tp_features.input_device_registered = 1;
11806 }
11807
11808 return 0;
11809 }
11810
11811 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
11812
11813 /*
11814 * This will autoload the driver in almost every ThinkPad
11815 * in widespread use.
11816 *
11817 * Only _VERY_ old models, like the 240, 240x and 570 lack
11818 * the HKEY event interface.
11819 */
11820 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
11821
11822 /*
11823 * DMI matching for module autoloading
11824 *
11825 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
11826 * See https://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
11827 *
11828 * Only models listed in thinkwiki will be supported, so add yours
11829 * if it is not there yet.
11830 */
11831 #define IBM_BIOS_MODULE_ALIAS(__type) \
11832 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
11833
11834 /* Ancient thinkpad BIOSes have to be identified by
11835 * BIOS type or model number, and there are far less
11836 * BIOS types than model numbers... */
11837 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
11838
11839 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
11840 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
11841 MODULE_DESCRIPTION(TPACPI_DESC);
11842 MODULE_VERSION(TPACPI_VERSION);
11843 MODULE_LICENSE("GPL");
11844
11845 module_init(thinkpad_acpi_module_init);
11846 module_exit(thinkpad_acpi_module_exit);
11847