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Keyboard backlight control for some Vaio Fit models
[deliverable/linux.git] / drivers / platform / x86 / thinkpad_acpi.c
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
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 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26 #define TPACPI_VERSION "0.25"
27 #define TPACPI_SYSFS_VERSION 0x020700
28
29 /*
30 * Changelog:
31 * 2007-10-20 changelog trimmed down
32 *
33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
34 * drivers/misc.
35 *
36 * 2006-11-22 0.13 new maintainer
37 * changelog now lives in git commit history, and will
38 * not be updated further in-file.
39 *
40 * 2005-03-17 0.11 support for 600e, 770x
41 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
42 *
43 * 2005-01-16 0.9 use MODULE_VERSION
44 * thanks to Henrik Brix Andersen <brix@gentoo.org>
45 * fix parameter passing on module loading
46 * thanks to Rusty Russell <rusty@rustcorp.com.au>
47 * thanks to Jim Radford <radford@blackbean.org>
48 * 2004-11-08 0.8 fix init error case, don't return from a macro
49 * thanks to Chris Wright <chrisw@osdl.org>
50 */
51
52 #include <linux/kernel.h>
53 #include <linux/module.h>
54 #include <linux/init.h>
55 #include <linux/types.h>
56 #include <linux/string.h>
57 #include <linux/list.h>
58 #include <linux/mutex.h>
59 #include <linux/sched.h>
60 #include <linux/kthread.h>
61 #include <linux/freezer.h>
62 #include <linux/delay.h>
63 #include <linux/slab.h>
64 #include <linux/nvram.h>
65 #include <linux/proc_fs.h>
66 #include <linux/seq_file.h>
67 #include <linux/sysfs.h>
68 #include <linux/backlight.h>
69 #include <linux/fb.h>
70 #include <linux/platform_device.h>
71 #include <linux/hwmon.h>
72 #include <linux/hwmon-sysfs.h>
73 #include <linux/input.h>
74 #include <linux/leds.h>
75 #include <linux/rfkill.h>
76 #include <linux/dmi.h>
77 #include <linux/jiffies.h>
78 #include <linux/workqueue.h>
79 #include <linux/acpi.h>
80 #include <linux/pci_ids.h>
81 #include <linux/thinkpad_acpi.h>
82 #include <sound/core.h>
83 #include <sound/control.h>
84 #include <sound/initval.h>
85 #include <asm/uaccess.h>
86 #include <acpi/video.h>
87
88 /* ThinkPad CMOS commands */
89 #define TP_CMOS_VOLUME_DOWN 0
90 #define TP_CMOS_VOLUME_UP 1
91 #define TP_CMOS_VOLUME_MUTE 2
92 #define TP_CMOS_BRIGHTNESS_UP 4
93 #define TP_CMOS_BRIGHTNESS_DOWN 5
94 #define TP_CMOS_THINKLIGHT_ON 12
95 #define TP_CMOS_THINKLIGHT_OFF 13
96
97 /* NVRAM Addresses */
98 enum tp_nvram_addr {
99 TP_NVRAM_ADDR_HK2 = 0x57,
100 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
101 TP_NVRAM_ADDR_VIDEO = 0x59,
102 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
103 TP_NVRAM_ADDR_MIXER = 0x60,
104 };
105
106 /* NVRAM bit masks */
107 enum {
108 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
109 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
110 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
111 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
112 TP_NVRAM_MASK_THINKLIGHT = 0x10,
113 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
114 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
115 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
116 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
117 TP_NVRAM_MASK_MUTE = 0x40,
118 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
119 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
120 TP_NVRAM_POS_LEVEL_VOLUME = 0,
121 };
122
123 /* Misc NVRAM-related */
124 enum {
125 TP_NVRAM_LEVEL_VOLUME_MAX = 14,
126 };
127
128 /* ACPI HIDs */
129 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
130 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
131 #define TPACPI_ACPI_EC_HID "PNP0C09"
132
133 /* Input IDs */
134 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
135 #define TPACPI_HKEY_INPUT_VERSION 0x4101
136
137 /* ACPI \WGSV commands */
138 enum {
139 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
140 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
141 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
142 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
143 };
144
145 /* TP_ACPI_WGSV_GET_STATE bits */
146 enum {
147 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
148 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
149 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
150 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
151 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
152 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
153 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
154 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
155 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
156 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
157 };
158
159 /* HKEY events */
160 enum tpacpi_hkey_event_t {
161 /* Hotkey-related */
162 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
163 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
164 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
165 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
166 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
167 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
168
169 /* Reasons for waking up from S3/S4 */
170 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
171 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
172 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
173 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
174 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
175 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
176
177 /* Auto-sleep after eject request */
178 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
179 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
180
181 /* Misc bay events */
182 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
183 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
184 or port replicator */
185 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
186 dock or port replicator */
187
188 /* User-interface events */
189 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
190 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
191 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
192 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
193 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
194 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
195 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
196
197 /* Key-related user-interface events */
198 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
199 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
200 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */
201
202 /* Thermal events */
203 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
204 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
205 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
206 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
207 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
208
209 /* AC-related events */
210 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */
211
212 /* Misc */
213 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
214 };
215
216 /****************************************************************************
217 * Main driver
218 */
219
220 #define TPACPI_NAME "thinkpad"
221 #define TPACPI_DESC "ThinkPad ACPI Extras"
222 #define TPACPI_FILE TPACPI_NAME "_acpi"
223 #define TPACPI_URL "http://ibm-acpi.sf.net/"
224 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
225
226 #define TPACPI_PROC_DIR "ibm"
227 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
228 #define TPACPI_DRVR_NAME TPACPI_FILE
229 #define TPACPI_DRVR_SHORTNAME "tpacpi"
230 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
231
232 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
233 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
234
235 #define TPACPI_MAX_ACPI_ARGS 3
236
237 /* Debugging printk groups */
238 #define TPACPI_DBG_ALL 0xffff
239 #define TPACPI_DBG_DISCLOSETASK 0x8000
240 #define TPACPI_DBG_INIT 0x0001
241 #define TPACPI_DBG_EXIT 0x0002
242 #define TPACPI_DBG_RFKILL 0x0004
243 #define TPACPI_DBG_HKEY 0x0008
244 #define TPACPI_DBG_FAN 0x0010
245 #define TPACPI_DBG_BRGHT 0x0020
246 #define TPACPI_DBG_MIXER 0x0040
247
248 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
249 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
250 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
251
252
253 /****************************************************************************
254 * Driver-wide structs and misc. variables
255 */
256
257 struct ibm_struct;
258
259 struct tp_acpi_drv_struct {
260 const struct acpi_device_id *hid;
261 struct acpi_driver *driver;
262
263 void (*notify) (struct ibm_struct *, u32);
264 acpi_handle *handle;
265 u32 type;
266 struct acpi_device *device;
267 };
268
269 struct ibm_struct {
270 char *name;
271
272 int (*read) (struct seq_file *);
273 int (*write) (char *);
274 void (*exit) (void);
275 void (*resume) (void);
276 void (*suspend) (void);
277 void (*shutdown) (void);
278
279 struct list_head all_drivers;
280
281 struct tp_acpi_drv_struct *acpi;
282
283 struct {
284 u8 acpi_driver_registered:1;
285 u8 acpi_notify_installed:1;
286 u8 proc_created:1;
287 u8 init_called:1;
288 u8 experimental:1;
289 } flags;
290 };
291
292 struct ibm_init_struct {
293 char param[32];
294
295 int (*init) (struct ibm_init_struct *);
296 umode_t base_procfs_mode;
297 struct ibm_struct *data;
298 };
299
300 static struct {
301 u32 bluetooth:1;
302 u32 hotkey:1;
303 u32 hotkey_mask:1;
304 u32 hotkey_wlsw:1;
305 u32 hotkey_tablet:1;
306 u32 light:1;
307 u32 light_status:1;
308 u32 bright_acpimode:1;
309 u32 bright_unkfw:1;
310 u32 wan:1;
311 u32 uwb:1;
312 u32 fan_ctrl_status_undef:1;
313 u32 second_fan:1;
314 u32 beep_needs_two_args:1;
315 u32 mixer_no_level_control:1;
316 u32 input_device_registered:1;
317 u32 platform_drv_registered:1;
318 u32 platform_drv_attrs_registered:1;
319 u32 sensors_pdrv_registered:1;
320 u32 sensors_pdrv_attrs_registered:1;
321 u32 sensors_pdev_attrs_registered:1;
322 u32 hotkey_poll_active:1;
323 u32 has_adaptive_kbd:1;
324 } tp_features;
325
326 static struct {
327 u16 hotkey_mask_ff:1;
328 u16 volume_ctrl_forbidden:1;
329 } tp_warned;
330
331 struct thinkpad_id_data {
332 unsigned int vendor; /* ThinkPad vendor:
333 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
334
335 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
336 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
337
338 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
339 u16 ec_model;
340 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
341 u16 ec_release;
342
343 char *model_str; /* ThinkPad T43 */
344 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
345 };
346 static struct thinkpad_id_data thinkpad_id;
347
348 static enum {
349 TPACPI_LIFE_INIT = 0,
350 TPACPI_LIFE_RUNNING,
351 TPACPI_LIFE_EXITING,
352 } tpacpi_lifecycle;
353
354 static int experimental;
355 static u32 dbg_level;
356
357 static struct workqueue_struct *tpacpi_wq;
358
359 enum led_status_t {
360 TPACPI_LED_OFF = 0,
361 TPACPI_LED_ON,
362 TPACPI_LED_BLINK,
363 };
364
365 /* Special LED class that can defer work */
366 struct tpacpi_led_classdev {
367 struct led_classdev led_classdev;
368 struct work_struct work;
369 enum led_status_t new_state;
370 int led;
371 };
372
373 /* brightness level capabilities */
374 static unsigned int bright_maxlvl; /* 0 = unknown */
375
376 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
377 static int dbg_wlswemul;
378 static bool tpacpi_wlsw_emulstate;
379 static int dbg_bluetoothemul;
380 static bool tpacpi_bluetooth_emulstate;
381 static int dbg_wwanemul;
382 static bool tpacpi_wwan_emulstate;
383 static int dbg_uwbemul;
384 static bool tpacpi_uwb_emulstate;
385 #endif
386
387
388 /*************************************************************************
389 * Debugging helpers
390 */
391
392 #define dbg_printk(a_dbg_level, format, arg...) \
393 do { \
394 if (dbg_level & (a_dbg_level)) \
395 printk(KERN_DEBUG pr_fmt("%s: " format), \
396 __func__, ##arg); \
397 } while (0)
398
399 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
400 #define vdbg_printk dbg_printk
401 static const char *str_supported(int is_supported);
402 #else
403 static inline const char *str_supported(int is_supported) { return ""; }
404 #define vdbg_printk(a_dbg_level, format, arg...) \
405 do { if (0) no_printk(format, ##arg); } while (0)
406 #endif
407
408 static void tpacpi_log_usertask(const char * const what)
409 {
410 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
411 what, task_tgid_vnr(current));
412 }
413
414 #define tpacpi_disclose_usertask(what, format, arg...) \
415 do { \
416 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
417 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
418 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
419 what, task_tgid_vnr(current), ## arg); \
420 } \
421 } while (0)
422
423 /*
424 * Quirk handling helpers
425 *
426 * ThinkPad IDs and versions seen in the field so far
427 * are two-characters from the set [0-9A-Z], i.e. base 36.
428 *
429 * We use values well outside that range as specials.
430 */
431
432 #define TPACPI_MATCH_ANY 0xffffU
433 #define TPACPI_MATCH_UNKNOWN 0U
434
435 /* TPID('1', 'Y') == 0x5931 */
436 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
437
438 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
439 { .vendor = PCI_VENDOR_ID_IBM, \
440 .bios = TPID(__id1, __id2), \
441 .ec = TPACPI_MATCH_ANY, \
442 .quirks = (__quirk) }
443
444 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
445 { .vendor = PCI_VENDOR_ID_LENOVO, \
446 .bios = TPID(__id1, __id2), \
447 .ec = TPACPI_MATCH_ANY, \
448 .quirks = (__quirk) }
449
450 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
451 { .vendor = PCI_VENDOR_ID_LENOVO, \
452 .bios = TPACPI_MATCH_ANY, \
453 .ec = TPID(__id1, __id2), \
454 .quirks = (__quirk) }
455
456 struct tpacpi_quirk {
457 unsigned int vendor;
458 u16 bios;
459 u16 ec;
460 unsigned long quirks;
461 };
462
463 /**
464 * tpacpi_check_quirks() - search BIOS/EC version on a list
465 * @qlist: array of &struct tpacpi_quirk
466 * @qlist_size: number of elements in @qlist
467 *
468 * Iterates over a quirks list until one is found that matches the
469 * ThinkPad's vendor, BIOS and EC model.
470 *
471 * Returns 0 if nothing matches, otherwise returns the quirks field of
472 * the matching &struct tpacpi_quirk entry.
473 *
474 * The match criteria is: vendor, ec and bios much match.
475 */
476 static unsigned long __init tpacpi_check_quirks(
477 const struct tpacpi_quirk *qlist,
478 unsigned int qlist_size)
479 {
480 while (qlist_size) {
481 if ((qlist->vendor == thinkpad_id.vendor ||
482 qlist->vendor == TPACPI_MATCH_ANY) &&
483 (qlist->bios == thinkpad_id.bios_model ||
484 qlist->bios == TPACPI_MATCH_ANY) &&
485 (qlist->ec == thinkpad_id.ec_model ||
486 qlist->ec == TPACPI_MATCH_ANY))
487 return qlist->quirks;
488
489 qlist_size--;
490 qlist++;
491 }
492 return 0;
493 }
494
495 static inline bool __pure __init tpacpi_is_lenovo(void)
496 {
497 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
498 }
499
500 static inline bool __pure __init tpacpi_is_ibm(void)
501 {
502 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
503 }
504
505 /****************************************************************************
506 ****************************************************************************
507 *
508 * ACPI Helpers and device model
509 *
510 ****************************************************************************
511 ****************************************************************************/
512
513 /*************************************************************************
514 * ACPI basic handles
515 */
516
517 static acpi_handle root_handle;
518 static acpi_handle ec_handle;
519
520 #define TPACPI_HANDLE(object, parent, paths...) \
521 static acpi_handle object##_handle; \
522 static const acpi_handle * const object##_parent __initconst = \
523 &parent##_handle; \
524 static char *object##_paths[] __initdata = { paths }
525
526 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
527 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
528
529 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
530 /* T4x, X31, X40 */
531 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
532 "\\CMS", /* R40, R40e */
533 ); /* all others */
534
535 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
536 "^HKEY", /* R30, R31 */
537 "HKEY", /* all others */
538 ); /* 570 */
539
540 /*************************************************************************
541 * ACPI helpers
542 */
543
544 static int acpi_evalf(acpi_handle handle,
545 int *res, char *method, char *fmt, ...)
546 {
547 char *fmt0 = fmt;
548 struct acpi_object_list params;
549 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
550 struct acpi_buffer result, *resultp;
551 union acpi_object out_obj;
552 acpi_status status;
553 va_list ap;
554 char res_type;
555 int success;
556 int quiet;
557
558 if (!*fmt) {
559 pr_err("acpi_evalf() called with empty format\n");
560 return 0;
561 }
562
563 if (*fmt == 'q') {
564 quiet = 1;
565 fmt++;
566 } else
567 quiet = 0;
568
569 res_type = *(fmt++);
570
571 params.count = 0;
572 params.pointer = &in_objs[0];
573
574 va_start(ap, fmt);
575 while (*fmt) {
576 char c = *(fmt++);
577 switch (c) {
578 case 'd': /* int */
579 in_objs[params.count].integer.value = va_arg(ap, int);
580 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
581 break;
582 /* add more types as needed */
583 default:
584 pr_err("acpi_evalf() called "
585 "with invalid format character '%c'\n", c);
586 va_end(ap);
587 return 0;
588 }
589 }
590 va_end(ap);
591
592 if (res_type != 'v') {
593 result.length = sizeof(out_obj);
594 result.pointer = &out_obj;
595 resultp = &result;
596 } else
597 resultp = NULL;
598
599 status = acpi_evaluate_object(handle, method, &params, resultp);
600
601 switch (res_type) {
602 case 'd': /* int */
603 success = (status == AE_OK &&
604 out_obj.type == ACPI_TYPE_INTEGER);
605 if (success && res)
606 *res = out_obj.integer.value;
607 break;
608 case 'v': /* void */
609 success = status == AE_OK;
610 break;
611 /* add more types as needed */
612 default:
613 pr_err("acpi_evalf() called "
614 "with invalid format character '%c'\n", res_type);
615 return 0;
616 }
617
618 if (!success && !quiet)
619 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
620 method, fmt0, acpi_format_exception(status));
621
622 return success;
623 }
624
625 static int acpi_ec_read(int i, u8 *p)
626 {
627 int v;
628
629 if (ecrd_handle) {
630 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
631 return 0;
632 *p = v;
633 } else {
634 if (ec_read(i, p) < 0)
635 return 0;
636 }
637
638 return 1;
639 }
640
641 static int acpi_ec_write(int i, u8 v)
642 {
643 if (ecwr_handle) {
644 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
645 return 0;
646 } else {
647 if (ec_write(i, v) < 0)
648 return 0;
649 }
650
651 return 1;
652 }
653
654 static int issue_thinkpad_cmos_command(int cmos_cmd)
655 {
656 if (!cmos_handle)
657 return -ENXIO;
658
659 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
660 return -EIO;
661
662 return 0;
663 }
664
665 /*************************************************************************
666 * ACPI device model
667 */
668
669 #define TPACPI_ACPIHANDLE_INIT(object) \
670 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
671 object##_paths, ARRAY_SIZE(object##_paths))
672
673 static void __init drv_acpi_handle_init(const char *name,
674 acpi_handle *handle, const acpi_handle parent,
675 char **paths, const int num_paths)
676 {
677 int i;
678 acpi_status status;
679
680 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
681 name);
682
683 for (i = 0; i < num_paths; i++) {
684 status = acpi_get_handle(parent, paths[i], handle);
685 if (ACPI_SUCCESS(status)) {
686 dbg_printk(TPACPI_DBG_INIT,
687 "Found ACPI handle %s for %s\n",
688 paths[i], name);
689 return;
690 }
691 }
692
693 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
694 name);
695 *handle = NULL;
696 }
697
698 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
699 u32 level, void *context, void **return_value)
700 {
701 struct acpi_device *dev;
702 if (!strcmp(context, "video")) {
703 if (acpi_bus_get_device(handle, &dev))
704 return AE_OK;
705 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
706 return AE_OK;
707 }
708
709 *(acpi_handle *)return_value = handle;
710
711 return AE_CTRL_TERMINATE;
712 }
713
714 static void __init tpacpi_acpi_handle_locate(const char *name,
715 const char *hid,
716 acpi_handle *handle)
717 {
718 acpi_status status;
719 acpi_handle device_found;
720
721 BUG_ON(!name || !handle);
722 vdbg_printk(TPACPI_DBG_INIT,
723 "trying to locate ACPI handle for %s, using HID %s\n",
724 name, hid ? hid : "NULL");
725
726 memset(&device_found, 0, sizeof(device_found));
727 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
728 (void *)name, &device_found);
729
730 *handle = NULL;
731
732 if (ACPI_SUCCESS(status)) {
733 *handle = device_found;
734 dbg_printk(TPACPI_DBG_INIT,
735 "Found ACPI handle for %s\n", name);
736 } else {
737 vdbg_printk(TPACPI_DBG_INIT,
738 "Could not locate an ACPI handle for %s: %s\n",
739 name, acpi_format_exception(status));
740 }
741 }
742
743 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
744 {
745 struct ibm_struct *ibm = data;
746
747 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
748 return;
749
750 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
751 return;
752
753 ibm->acpi->notify(ibm, event);
754 }
755
756 static int __init setup_acpi_notify(struct ibm_struct *ibm)
757 {
758 acpi_status status;
759 int rc;
760
761 BUG_ON(!ibm->acpi);
762
763 if (!*ibm->acpi->handle)
764 return 0;
765
766 vdbg_printk(TPACPI_DBG_INIT,
767 "setting up ACPI notify for %s\n", ibm->name);
768
769 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
770 if (rc < 0) {
771 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
772 return -ENODEV;
773 }
774
775 ibm->acpi->device->driver_data = ibm;
776 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
777 TPACPI_ACPI_EVENT_PREFIX,
778 ibm->name);
779
780 status = acpi_install_notify_handler(*ibm->acpi->handle,
781 ibm->acpi->type, dispatch_acpi_notify, ibm);
782 if (ACPI_FAILURE(status)) {
783 if (status == AE_ALREADY_EXISTS) {
784 pr_notice("another device driver is already "
785 "handling %s events\n", ibm->name);
786 } else {
787 pr_err("acpi_install_notify_handler(%s) failed: %s\n",
788 ibm->name, acpi_format_exception(status));
789 }
790 return -ENODEV;
791 }
792 ibm->flags.acpi_notify_installed = 1;
793 return 0;
794 }
795
796 static int __init tpacpi_device_add(struct acpi_device *device)
797 {
798 return 0;
799 }
800
801 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
802 {
803 int rc;
804
805 dbg_printk(TPACPI_DBG_INIT,
806 "registering %s as an ACPI driver\n", ibm->name);
807
808 BUG_ON(!ibm->acpi);
809
810 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
811 if (!ibm->acpi->driver) {
812 pr_err("failed to allocate memory for ibm->acpi->driver\n");
813 return -ENOMEM;
814 }
815
816 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
817 ibm->acpi->driver->ids = ibm->acpi->hid;
818
819 ibm->acpi->driver->ops.add = &tpacpi_device_add;
820
821 rc = acpi_bus_register_driver(ibm->acpi->driver);
822 if (rc < 0) {
823 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
824 ibm->name, rc);
825 kfree(ibm->acpi->driver);
826 ibm->acpi->driver = NULL;
827 } else if (!rc)
828 ibm->flags.acpi_driver_registered = 1;
829
830 return rc;
831 }
832
833
834 /****************************************************************************
835 ****************************************************************************
836 *
837 * Procfs Helpers
838 *
839 ****************************************************************************
840 ****************************************************************************/
841
842 static int dispatch_proc_show(struct seq_file *m, void *v)
843 {
844 struct ibm_struct *ibm = m->private;
845
846 if (!ibm || !ibm->read)
847 return -EINVAL;
848 return ibm->read(m);
849 }
850
851 static int dispatch_proc_open(struct inode *inode, struct file *file)
852 {
853 return single_open(file, dispatch_proc_show, PDE_DATA(inode));
854 }
855
856 static ssize_t dispatch_proc_write(struct file *file,
857 const char __user *userbuf,
858 size_t count, loff_t *pos)
859 {
860 struct ibm_struct *ibm = PDE_DATA(file_inode(file));
861 char *kernbuf;
862 int ret;
863
864 if (!ibm || !ibm->write)
865 return -EINVAL;
866 if (count > PAGE_SIZE - 2)
867 return -EINVAL;
868
869 kernbuf = kmalloc(count + 2, GFP_KERNEL);
870 if (!kernbuf)
871 return -ENOMEM;
872
873 if (copy_from_user(kernbuf, userbuf, count)) {
874 kfree(kernbuf);
875 return -EFAULT;
876 }
877
878 kernbuf[count] = 0;
879 strcat(kernbuf, ",");
880 ret = ibm->write(kernbuf);
881 if (ret == 0)
882 ret = count;
883
884 kfree(kernbuf);
885
886 return ret;
887 }
888
889 static const struct file_operations dispatch_proc_fops = {
890 .owner = THIS_MODULE,
891 .open = dispatch_proc_open,
892 .read = seq_read,
893 .llseek = seq_lseek,
894 .release = single_release,
895 .write = dispatch_proc_write,
896 };
897
898 static char *next_cmd(char **cmds)
899 {
900 char *start = *cmds;
901 char *end;
902
903 while ((end = strchr(start, ',')) && end == start)
904 start = end + 1;
905
906 if (!end)
907 return NULL;
908
909 *end = 0;
910 *cmds = end + 1;
911 return start;
912 }
913
914
915 /****************************************************************************
916 ****************************************************************************
917 *
918 * Device model: input, hwmon and platform
919 *
920 ****************************************************************************
921 ****************************************************************************/
922
923 static struct platform_device *tpacpi_pdev;
924 static struct platform_device *tpacpi_sensors_pdev;
925 static struct device *tpacpi_hwmon;
926 static struct input_dev *tpacpi_inputdev;
927 static struct mutex tpacpi_inputdev_send_mutex;
928 static LIST_HEAD(tpacpi_all_drivers);
929
930 #ifdef CONFIG_PM_SLEEP
931 static int tpacpi_suspend_handler(struct device *dev)
932 {
933 struct ibm_struct *ibm, *itmp;
934
935 list_for_each_entry_safe(ibm, itmp,
936 &tpacpi_all_drivers,
937 all_drivers) {
938 if (ibm->suspend)
939 (ibm->suspend)();
940 }
941
942 return 0;
943 }
944
945 static int tpacpi_resume_handler(struct device *dev)
946 {
947 struct ibm_struct *ibm, *itmp;
948
949 list_for_each_entry_safe(ibm, itmp,
950 &tpacpi_all_drivers,
951 all_drivers) {
952 if (ibm->resume)
953 (ibm->resume)();
954 }
955
956 return 0;
957 }
958 #endif
959
960 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
961 tpacpi_suspend_handler, tpacpi_resume_handler);
962
963 static void tpacpi_shutdown_handler(struct platform_device *pdev)
964 {
965 struct ibm_struct *ibm, *itmp;
966
967 list_for_each_entry_safe(ibm, itmp,
968 &tpacpi_all_drivers,
969 all_drivers) {
970 if (ibm->shutdown)
971 (ibm->shutdown)();
972 }
973 }
974
975 static struct platform_driver tpacpi_pdriver = {
976 .driver = {
977 .name = TPACPI_DRVR_NAME,
978 .pm = &tpacpi_pm,
979 },
980 .shutdown = tpacpi_shutdown_handler,
981 };
982
983 static struct platform_driver tpacpi_hwmon_pdriver = {
984 .driver = {
985 .name = TPACPI_HWMON_DRVR_NAME,
986 },
987 };
988
989 /*************************************************************************
990 * sysfs support helpers
991 */
992
993 struct attribute_set {
994 unsigned int members, max_members;
995 struct attribute_group group;
996 };
997
998 struct attribute_set_obj {
999 struct attribute_set s;
1000 struct attribute *a;
1001 } __attribute__((packed));
1002
1003 static struct attribute_set *create_attr_set(unsigned int max_members,
1004 const char *name)
1005 {
1006 struct attribute_set_obj *sobj;
1007
1008 if (max_members == 0)
1009 return NULL;
1010
1011 /* Allocates space for implicit NULL at the end too */
1012 sobj = kzalloc(sizeof(struct attribute_set_obj) +
1013 max_members * sizeof(struct attribute *),
1014 GFP_KERNEL);
1015 if (!sobj)
1016 return NULL;
1017 sobj->s.max_members = max_members;
1018 sobj->s.group.attrs = &sobj->a;
1019 sobj->s.group.name = name;
1020
1021 return &sobj->s;
1022 }
1023
1024 #define destroy_attr_set(_set) \
1025 kfree(_set);
1026
1027 /* not multi-threaded safe, use it in a single thread per set */
1028 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1029 {
1030 if (!s || !attr)
1031 return -EINVAL;
1032
1033 if (s->members >= s->max_members)
1034 return -ENOMEM;
1035
1036 s->group.attrs[s->members] = attr;
1037 s->members++;
1038
1039 return 0;
1040 }
1041
1042 static int add_many_to_attr_set(struct attribute_set *s,
1043 struct attribute **attr,
1044 unsigned int count)
1045 {
1046 int i, res;
1047
1048 for (i = 0; i < count; i++) {
1049 res = add_to_attr_set(s, attr[i]);
1050 if (res)
1051 return res;
1052 }
1053
1054 return 0;
1055 }
1056
1057 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1058 {
1059 sysfs_remove_group(kobj, &s->group);
1060 destroy_attr_set(s);
1061 }
1062
1063 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1064 sysfs_create_group(_kobj, &_attr_set->group)
1065
1066 static int parse_strtoul(const char *buf,
1067 unsigned long max, unsigned long *value)
1068 {
1069 char *endp;
1070
1071 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1072 endp = skip_spaces(endp);
1073 if (*endp || *value > max)
1074 return -EINVAL;
1075
1076 return 0;
1077 }
1078
1079 static void tpacpi_disable_brightness_delay(void)
1080 {
1081 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1082 pr_notice("ACPI backlight control delay disabled\n");
1083 }
1084
1085 static void printk_deprecated_attribute(const char * const what,
1086 const char * const details)
1087 {
1088 tpacpi_log_usertask("deprecated sysfs attribute");
1089 pr_warn("WARNING: sysfs attribute %s is deprecated and "
1090 "will be removed. %s\n",
1091 what, details);
1092 }
1093
1094 /*************************************************************************
1095 * rfkill and radio control support helpers
1096 */
1097
1098 /*
1099 * ThinkPad-ACPI firmware handling model:
1100 *
1101 * WLSW (master wireless switch) is event-driven, and is common to all
1102 * firmware-controlled radios. It cannot be controlled, just monitored,
1103 * as expected. It overrides all radio state in firmware
1104 *
1105 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1106 * (TODO: verify how WLSW interacts with the returned radio state).
1107 *
1108 * The only time there are shadow radio state changes, is when
1109 * masked-off hotkeys are used.
1110 */
1111
1112 /*
1113 * Internal driver API for radio state:
1114 *
1115 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1116 * bool: true means radio blocked (off)
1117 */
1118 enum tpacpi_rfkill_state {
1119 TPACPI_RFK_RADIO_OFF = 0,
1120 TPACPI_RFK_RADIO_ON
1121 };
1122
1123 /* rfkill switches */
1124 enum tpacpi_rfk_id {
1125 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1126 TPACPI_RFK_WWAN_SW_ID,
1127 TPACPI_RFK_UWB_SW_ID,
1128 TPACPI_RFK_SW_MAX
1129 };
1130
1131 static const char *tpacpi_rfkill_names[] = {
1132 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1133 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1134 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1135 [TPACPI_RFK_SW_MAX] = NULL
1136 };
1137
1138 /* ThinkPad-ACPI rfkill subdriver */
1139 struct tpacpi_rfk {
1140 struct rfkill *rfkill;
1141 enum tpacpi_rfk_id id;
1142 const struct tpacpi_rfk_ops *ops;
1143 };
1144
1145 struct tpacpi_rfk_ops {
1146 /* firmware interface */
1147 int (*get_status)(void);
1148 int (*set_status)(const enum tpacpi_rfkill_state);
1149 };
1150
1151 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1152
1153 /* Query FW and update rfkill sw state for a given rfkill switch */
1154 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1155 {
1156 int status;
1157
1158 if (!tp_rfk)
1159 return -ENODEV;
1160
1161 status = (tp_rfk->ops->get_status)();
1162 if (status < 0)
1163 return status;
1164
1165 rfkill_set_sw_state(tp_rfk->rfkill,
1166 (status == TPACPI_RFK_RADIO_OFF));
1167
1168 return status;
1169 }
1170
1171 /* Query FW and update rfkill sw state for all rfkill switches */
1172 static void tpacpi_rfk_update_swstate_all(void)
1173 {
1174 unsigned int i;
1175
1176 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1177 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1178 }
1179
1180 /*
1181 * Sync the HW-blocking state of all rfkill switches,
1182 * do notice it causes the rfkill core to schedule uevents
1183 */
1184 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1185 {
1186 unsigned int i;
1187 struct tpacpi_rfk *tp_rfk;
1188
1189 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1190 tp_rfk = tpacpi_rfkill_switches[i];
1191 if (tp_rfk) {
1192 if (rfkill_set_hw_state(tp_rfk->rfkill,
1193 blocked)) {
1194 /* ignore -- we track sw block */
1195 }
1196 }
1197 }
1198 }
1199
1200 /* Call to get the WLSW state from the firmware */
1201 static int hotkey_get_wlsw(void);
1202
1203 /* Call to query WLSW state and update all rfkill switches */
1204 static bool tpacpi_rfk_check_hwblock_state(void)
1205 {
1206 int res = hotkey_get_wlsw();
1207 int hw_blocked;
1208
1209 /* When unknown or unsupported, we have to assume it is unblocked */
1210 if (res < 0)
1211 return false;
1212
1213 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1214 tpacpi_rfk_update_hwblock_state(hw_blocked);
1215
1216 return hw_blocked;
1217 }
1218
1219 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1220 {
1221 struct tpacpi_rfk *tp_rfk = data;
1222 int res;
1223
1224 dbg_printk(TPACPI_DBG_RFKILL,
1225 "request to change radio state to %s\n",
1226 blocked ? "blocked" : "unblocked");
1227
1228 /* try to set radio state */
1229 res = (tp_rfk->ops->set_status)(blocked ?
1230 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1231
1232 /* and update the rfkill core with whatever the FW really did */
1233 tpacpi_rfk_update_swstate(tp_rfk);
1234
1235 return (res < 0) ? res : 0;
1236 }
1237
1238 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1239 .set_block = tpacpi_rfk_hook_set_block,
1240 };
1241
1242 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1243 const struct tpacpi_rfk_ops *tp_rfkops,
1244 const enum rfkill_type rfktype,
1245 const char *name,
1246 const bool set_default)
1247 {
1248 struct tpacpi_rfk *atp_rfk;
1249 int res;
1250 bool sw_state = false;
1251 bool hw_state;
1252 int sw_status;
1253
1254 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1255
1256 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1257 if (atp_rfk)
1258 atp_rfk->rfkill = rfkill_alloc(name,
1259 &tpacpi_pdev->dev,
1260 rfktype,
1261 &tpacpi_rfk_rfkill_ops,
1262 atp_rfk);
1263 if (!atp_rfk || !atp_rfk->rfkill) {
1264 pr_err("failed to allocate memory for rfkill class\n");
1265 kfree(atp_rfk);
1266 return -ENOMEM;
1267 }
1268
1269 atp_rfk->id = id;
1270 atp_rfk->ops = tp_rfkops;
1271
1272 sw_status = (tp_rfkops->get_status)();
1273 if (sw_status < 0) {
1274 pr_err("failed to read initial state for %s, error %d\n",
1275 name, sw_status);
1276 } else {
1277 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1278 if (set_default) {
1279 /* try to keep the initial state, since we ask the
1280 * firmware to preserve it across S5 in NVRAM */
1281 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1282 }
1283 }
1284 hw_state = tpacpi_rfk_check_hwblock_state();
1285 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1286
1287 res = rfkill_register(atp_rfk->rfkill);
1288 if (res < 0) {
1289 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1290 rfkill_destroy(atp_rfk->rfkill);
1291 kfree(atp_rfk);
1292 return res;
1293 }
1294
1295 tpacpi_rfkill_switches[id] = atp_rfk;
1296
1297 pr_info("rfkill switch %s: radio is %sblocked\n",
1298 name, (sw_state || hw_state) ? "" : "un");
1299 return 0;
1300 }
1301
1302 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1303 {
1304 struct tpacpi_rfk *tp_rfk;
1305
1306 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1307
1308 tp_rfk = tpacpi_rfkill_switches[id];
1309 if (tp_rfk) {
1310 rfkill_unregister(tp_rfk->rfkill);
1311 rfkill_destroy(tp_rfk->rfkill);
1312 tpacpi_rfkill_switches[id] = NULL;
1313 kfree(tp_rfk);
1314 }
1315 }
1316
1317 static void printk_deprecated_rfkill_attribute(const char * const what)
1318 {
1319 printk_deprecated_attribute(what,
1320 "Please switch to generic rfkill before year 2010");
1321 }
1322
1323 /* sysfs <radio> enable ------------------------------------------------ */
1324 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1325 struct device_attribute *attr,
1326 char *buf)
1327 {
1328 int status;
1329
1330 printk_deprecated_rfkill_attribute(attr->attr.name);
1331
1332 /* This is in the ABI... */
1333 if (tpacpi_rfk_check_hwblock_state()) {
1334 status = TPACPI_RFK_RADIO_OFF;
1335 } else {
1336 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1337 if (status < 0)
1338 return status;
1339 }
1340
1341 return snprintf(buf, PAGE_SIZE, "%d\n",
1342 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1343 }
1344
1345 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1346 struct device_attribute *attr,
1347 const char *buf, size_t count)
1348 {
1349 unsigned long t;
1350 int res;
1351
1352 printk_deprecated_rfkill_attribute(attr->attr.name);
1353
1354 if (parse_strtoul(buf, 1, &t))
1355 return -EINVAL;
1356
1357 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1358
1359 /* This is in the ABI... */
1360 if (tpacpi_rfk_check_hwblock_state() && !!t)
1361 return -EPERM;
1362
1363 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1364 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1365 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1366
1367 return (res < 0) ? res : count;
1368 }
1369
1370 /* procfs -------------------------------------------------------------- */
1371 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1372 {
1373 if (id >= TPACPI_RFK_SW_MAX)
1374 seq_printf(m, "status:\t\tnot supported\n");
1375 else {
1376 int status;
1377
1378 /* This is in the ABI... */
1379 if (tpacpi_rfk_check_hwblock_state()) {
1380 status = TPACPI_RFK_RADIO_OFF;
1381 } else {
1382 status = tpacpi_rfk_update_swstate(
1383 tpacpi_rfkill_switches[id]);
1384 if (status < 0)
1385 return status;
1386 }
1387
1388 seq_printf(m, "status:\t\t%s\n",
1389 (status == TPACPI_RFK_RADIO_ON) ?
1390 "enabled" : "disabled");
1391 seq_printf(m, "commands:\tenable, disable\n");
1392 }
1393
1394 return 0;
1395 }
1396
1397 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1398 {
1399 char *cmd;
1400 int status = -1;
1401 int res = 0;
1402
1403 if (id >= TPACPI_RFK_SW_MAX)
1404 return -ENODEV;
1405
1406 while ((cmd = next_cmd(&buf))) {
1407 if (strlencmp(cmd, "enable") == 0)
1408 status = TPACPI_RFK_RADIO_ON;
1409 else if (strlencmp(cmd, "disable") == 0)
1410 status = TPACPI_RFK_RADIO_OFF;
1411 else
1412 return -EINVAL;
1413 }
1414
1415 if (status != -1) {
1416 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1417 (status == TPACPI_RFK_RADIO_ON) ?
1418 "enable" : "disable",
1419 tpacpi_rfkill_names[id]);
1420 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1421 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1422 }
1423
1424 return res;
1425 }
1426
1427 /*************************************************************************
1428 * thinkpad-acpi driver attributes
1429 */
1430
1431 /* interface_version --------------------------------------------------- */
1432 static ssize_t tpacpi_driver_interface_version_show(
1433 struct device_driver *drv,
1434 char *buf)
1435 {
1436 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1437 }
1438
1439 static DRIVER_ATTR(interface_version, S_IRUGO,
1440 tpacpi_driver_interface_version_show, NULL);
1441
1442 /* debug_level --------------------------------------------------------- */
1443 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1444 char *buf)
1445 {
1446 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1447 }
1448
1449 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1450 const char *buf, size_t count)
1451 {
1452 unsigned long t;
1453
1454 if (parse_strtoul(buf, 0xffff, &t))
1455 return -EINVAL;
1456
1457 dbg_level = t;
1458
1459 return count;
1460 }
1461
1462 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1463 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1464
1465 /* version ------------------------------------------------------------- */
1466 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1467 char *buf)
1468 {
1469 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1470 TPACPI_DESC, TPACPI_VERSION);
1471 }
1472
1473 static DRIVER_ATTR(version, S_IRUGO,
1474 tpacpi_driver_version_show, NULL);
1475
1476 /* --------------------------------------------------------------------- */
1477
1478 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1479
1480 /* wlsw_emulstate ------------------------------------------------------ */
1481 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1482 char *buf)
1483 {
1484 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1485 }
1486
1487 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1488 const char *buf, size_t count)
1489 {
1490 unsigned long t;
1491
1492 if (parse_strtoul(buf, 1, &t))
1493 return -EINVAL;
1494
1495 if (tpacpi_wlsw_emulstate != !!t) {
1496 tpacpi_wlsw_emulstate = !!t;
1497 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1498 }
1499
1500 return count;
1501 }
1502
1503 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1504 tpacpi_driver_wlsw_emulstate_show,
1505 tpacpi_driver_wlsw_emulstate_store);
1506
1507 /* bluetooth_emulstate ------------------------------------------------- */
1508 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1509 struct device_driver *drv,
1510 char *buf)
1511 {
1512 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1513 }
1514
1515 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1516 struct device_driver *drv,
1517 const char *buf, size_t count)
1518 {
1519 unsigned long t;
1520
1521 if (parse_strtoul(buf, 1, &t))
1522 return -EINVAL;
1523
1524 tpacpi_bluetooth_emulstate = !!t;
1525
1526 return count;
1527 }
1528
1529 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1530 tpacpi_driver_bluetooth_emulstate_show,
1531 tpacpi_driver_bluetooth_emulstate_store);
1532
1533 /* wwan_emulstate ------------------------------------------------- */
1534 static ssize_t tpacpi_driver_wwan_emulstate_show(
1535 struct device_driver *drv,
1536 char *buf)
1537 {
1538 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1539 }
1540
1541 static ssize_t tpacpi_driver_wwan_emulstate_store(
1542 struct device_driver *drv,
1543 const char *buf, size_t count)
1544 {
1545 unsigned long t;
1546
1547 if (parse_strtoul(buf, 1, &t))
1548 return -EINVAL;
1549
1550 tpacpi_wwan_emulstate = !!t;
1551
1552 return count;
1553 }
1554
1555 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1556 tpacpi_driver_wwan_emulstate_show,
1557 tpacpi_driver_wwan_emulstate_store);
1558
1559 /* uwb_emulstate ------------------------------------------------- */
1560 static ssize_t tpacpi_driver_uwb_emulstate_show(
1561 struct device_driver *drv,
1562 char *buf)
1563 {
1564 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1565 }
1566
1567 static ssize_t tpacpi_driver_uwb_emulstate_store(
1568 struct device_driver *drv,
1569 const char *buf, size_t count)
1570 {
1571 unsigned long t;
1572
1573 if (parse_strtoul(buf, 1, &t))
1574 return -EINVAL;
1575
1576 tpacpi_uwb_emulstate = !!t;
1577
1578 return count;
1579 }
1580
1581 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1582 tpacpi_driver_uwb_emulstate_show,
1583 tpacpi_driver_uwb_emulstate_store);
1584 #endif
1585
1586 /* --------------------------------------------------------------------- */
1587
1588 static struct driver_attribute *tpacpi_driver_attributes[] = {
1589 &driver_attr_debug_level, &driver_attr_version,
1590 &driver_attr_interface_version,
1591 };
1592
1593 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1594 {
1595 int i, res;
1596
1597 i = 0;
1598 res = 0;
1599 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1600 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1601 i++;
1602 }
1603
1604 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1605 if (!res && dbg_wlswemul)
1606 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1607 if (!res && dbg_bluetoothemul)
1608 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1609 if (!res && dbg_wwanemul)
1610 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1611 if (!res && dbg_uwbemul)
1612 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1613 #endif
1614
1615 return res;
1616 }
1617
1618 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1619 {
1620 int i;
1621
1622 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1623 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1624
1625 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1626 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1627 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1628 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1629 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1630 #endif
1631 }
1632
1633 /*************************************************************************
1634 * Firmware Data
1635 */
1636
1637 /*
1638 * Table of recommended minimum BIOS versions
1639 *
1640 * Reasons for listing:
1641 * 1. Stable BIOS, listed because the unknown amount of
1642 * bugs and bad ACPI behaviour on older versions
1643 *
1644 * 2. BIOS or EC fw with known bugs that trigger on Linux
1645 *
1646 * 3. BIOS with known reduced functionality in older versions
1647 *
1648 * We recommend the latest BIOS and EC version.
1649 * We only support the latest BIOS and EC fw version as a rule.
1650 *
1651 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1652 * Information from users in ThinkWiki
1653 *
1654 * WARNING: we use this table also to detect that the machine is
1655 * a ThinkPad in some cases, so don't remove entries lightly.
1656 */
1657
1658 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1659 { .vendor = (__v), \
1660 .bios = TPID(__id1, __id2), \
1661 .ec = TPACPI_MATCH_ANY, \
1662 .quirks = TPACPI_MATCH_ANY << 16 \
1663 | (__bv1) << 8 | (__bv2) }
1664
1665 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1666 __eid, __ev1, __ev2) \
1667 { .vendor = (__v), \
1668 .bios = TPID(__bid1, __bid2), \
1669 .ec = __eid, \
1670 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1671 | (__bv1) << 8 | (__bv2) }
1672
1673 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1674 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1675
1676 /* Outdated IBM BIOSes often lack the EC id string */
1677 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1678 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1679 __bv1, __bv2, TPID(__id1, __id2), \
1680 __ev1, __ev2), \
1681 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1682 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1683 __ev1, __ev2)
1684
1685 /* Outdated IBM BIOSes often lack the EC id string */
1686 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1687 __eid1, __eid2, __ev1, __ev2) \
1688 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1689 __bv1, __bv2, TPID(__eid1, __eid2), \
1690 __ev1, __ev2), \
1691 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1692 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1693 __ev1, __ev2)
1694
1695 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1696 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1697
1698 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1699 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1700 __bv1, __bv2, TPID(__id1, __id2), \
1701 __ev1, __ev2)
1702
1703 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1704 __eid1, __eid2, __ev1, __ev2) \
1705 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1706 __bv1, __bv2, TPID(__eid1, __eid2), \
1707 __ev1, __ev2)
1708
1709 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1710 /* Numeric models ------------------ */
1711 /* FW MODEL BIOS VERS */
1712 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1713 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1714 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1715 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1716 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1717 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1718 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1719 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1720 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1721
1722 /* A-series ------------------------- */
1723 /* FW MODEL BIOS VERS EC VERS */
1724 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1725 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1726 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1727 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1728 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1729 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1730 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1731 TPV_QI0('1', '3', '2', '0'), /* A22m */
1732 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1733 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1734 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1735
1736 /* G-series ------------------------- */
1737 /* FW MODEL BIOS VERS */
1738 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1739 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1740
1741 /* R-series, T-series --------------- */
1742 /* FW MODEL BIOS VERS EC VERS */
1743 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1744 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1745 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1746 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1747 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1748 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1749 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1750 T40/p, T41/p, T42/p (1) */
1751 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1752 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1753 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1754 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1755
1756 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1757 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1758 TPV_QI0('1', '6', '3', '2'), /* T22 */
1759 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1760 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1761 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1762
1763 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1764 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1765 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1766
1767 /* BIOS FW BIOS VERS EC FW EC VERS */
1768 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1769 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1770
1771 /* X-series ------------------------- */
1772 /* FW MODEL BIOS VERS EC VERS */
1773 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1774 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1775 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1776 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1777 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1778 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1779 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1780
1781 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1782 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1783
1784 /* (0) - older versions lack DMI EC fw string and functionality */
1785 /* (1) - older versions known to lack functionality */
1786 };
1787
1788 #undef TPV_QL1
1789 #undef TPV_QL0
1790 #undef TPV_QI2
1791 #undef TPV_QI1
1792 #undef TPV_QI0
1793 #undef TPV_Q_X
1794 #undef TPV_Q
1795
1796 static void __init tpacpi_check_outdated_fw(void)
1797 {
1798 unsigned long fwvers;
1799 u16 ec_version, bios_version;
1800
1801 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1802 ARRAY_SIZE(tpacpi_bios_version_qtable));
1803
1804 if (!fwvers)
1805 return;
1806
1807 bios_version = fwvers & 0xffffU;
1808 ec_version = (fwvers >> 16) & 0xffffU;
1809
1810 /* note that unknown versions are set to 0x0000 and we use that */
1811 if ((bios_version > thinkpad_id.bios_release) ||
1812 (ec_version > thinkpad_id.ec_release &&
1813 ec_version != TPACPI_MATCH_ANY)) {
1814 /*
1815 * The changelogs would let us track down the exact
1816 * reason, but it is just too much of a pain to track
1817 * it. We only list BIOSes that are either really
1818 * broken, or really stable to begin with, so it is
1819 * best if the user upgrades the firmware anyway.
1820 */
1821 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1822 pr_warn("WARNING: This firmware may be missing critical bug "
1823 "fixes and/or important features\n");
1824 }
1825 }
1826
1827 static bool __init tpacpi_is_fw_known(void)
1828 {
1829 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1830 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1831 }
1832
1833 /****************************************************************************
1834 ****************************************************************************
1835 *
1836 * Subdrivers
1837 *
1838 ****************************************************************************
1839 ****************************************************************************/
1840
1841 /*************************************************************************
1842 * thinkpad-acpi metadata subdriver
1843 */
1844
1845 static int thinkpad_acpi_driver_read(struct seq_file *m)
1846 {
1847 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1848 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1849 return 0;
1850 }
1851
1852 static struct ibm_struct thinkpad_acpi_driver_data = {
1853 .name = "driver",
1854 .read = thinkpad_acpi_driver_read,
1855 };
1856
1857 /*************************************************************************
1858 * Hotkey subdriver
1859 */
1860
1861 /*
1862 * ThinkPad firmware event model
1863 *
1864 * The ThinkPad firmware has two main event interfaces: normal ACPI
1865 * notifications (which follow the ACPI standard), and a private event
1866 * interface.
1867 *
1868 * The private event interface also issues events for the hotkeys. As
1869 * the driver gained features, the event handling code ended up being
1870 * built around the hotkey subdriver. This will need to be refactored
1871 * to a more formal event API eventually.
1872 *
1873 * Some "hotkeys" are actually supposed to be used as event reports,
1874 * such as "brightness has changed", "volume has changed", depending on
1875 * the ThinkPad model and how the firmware is operating.
1876 *
1877 * Unlike other classes, hotkey-class events have mask/unmask control on
1878 * non-ancient firmware. However, how it behaves changes a lot with the
1879 * firmware model and version.
1880 */
1881
1882 enum { /* hot key scan codes (derived from ACPI DSDT) */
1883 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1884 TP_ACPI_HOTKEYSCAN_FNF2,
1885 TP_ACPI_HOTKEYSCAN_FNF3,
1886 TP_ACPI_HOTKEYSCAN_FNF4,
1887 TP_ACPI_HOTKEYSCAN_FNF5,
1888 TP_ACPI_HOTKEYSCAN_FNF6,
1889 TP_ACPI_HOTKEYSCAN_FNF7,
1890 TP_ACPI_HOTKEYSCAN_FNF8,
1891 TP_ACPI_HOTKEYSCAN_FNF9,
1892 TP_ACPI_HOTKEYSCAN_FNF10,
1893 TP_ACPI_HOTKEYSCAN_FNF11,
1894 TP_ACPI_HOTKEYSCAN_FNF12,
1895 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1896 TP_ACPI_HOTKEYSCAN_FNINSERT,
1897 TP_ACPI_HOTKEYSCAN_FNDELETE,
1898 TP_ACPI_HOTKEYSCAN_FNHOME,
1899 TP_ACPI_HOTKEYSCAN_FNEND,
1900 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1901 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1902 TP_ACPI_HOTKEYSCAN_FNSPACE,
1903 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1904 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1905 TP_ACPI_HOTKEYSCAN_MUTE,
1906 TP_ACPI_HOTKEYSCAN_THINKPAD,
1907 TP_ACPI_HOTKEYSCAN_UNK1,
1908 TP_ACPI_HOTKEYSCAN_UNK2,
1909 TP_ACPI_HOTKEYSCAN_UNK3,
1910 TP_ACPI_HOTKEYSCAN_UNK4,
1911 TP_ACPI_HOTKEYSCAN_UNK5,
1912 TP_ACPI_HOTKEYSCAN_UNK6,
1913 TP_ACPI_HOTKEYSCAN_UNK7,
1914 TP_ACPI_HOTKEYSCAN_UNK8,
1915
1916 TP_ACPI_HOTKEYSCAN_MUTE2,
1917 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
1918 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
1919 TP_ACPI_HOTKEYSCAN_CLOUD,
1920 TP_ACPI_HOTKEYSCAN_UNK9,
1921 TP_ACPI_HOTKEYSCAN_VOICE,
1922 TP_ACPI_HOTKEYSCAN_UNK10,
1923 TP_ACPI_HOTKEYSCAN_GESTURES,
1924 TP_ACPI_HOTKEYSCAN_UNK11,
1925 TP_ACPI_HOTKEYSCAN_UNK12,
1926 TP_ACPI_HOTKEYSCAN_UNK13,
1927 TP_ACPI_HOTKEYSCAN_CONFIG,
1928 TP_ACPI_HOTKEYSCAN_NEW_TAB,
1929 TP_ACPI_HOTKEYSCAN_RELOAD,
1930 TP_ACPI_HOTKEYSCAN_BACK,
1931 TP_ACPI_HOTKEYSCAN_MIC_DOWN,
1932 TP_ACPI_HOTKEYSCAN_MIC_UP,
1933 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
1934 TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
1935 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
1936
1937 /* Hotkey keymap size */
1938 TPACPI_HOTKEY_MAP_LEN
1939 };
1940
1941 enum { /* Keys/events available through NVRAM polling */
1942 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1943 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1944 };
1945
1946 enum { /* Positions of some of the keys in hotkey masks */
1947 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1948 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1949 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1950 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1951 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1952 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1953 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1954 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1955 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1956 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1957 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1958 };
1959
1960 enum { /* NVRAM to ACPI HKEY group map */
1961 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1962 TP_ACPI_HKEY_ZOOM_MASK |
1963 TP_ACPI_HKEY_DISPSWTCH_MASK |
1964 TP_ACPI_HKEY_HIBERNATE_MASK,
1965 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1966 TP_ACPI_HKEY_BRGHTDWN_MASK,
1967 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1968 TP_ACPI_HKEY_VOLDWN_MASK |
1969 TP_ACPI_HKEY_MUTE_MASK,
1970 };
1971
1972 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1973 struct tp_nvram_state {
1974 u16 thinkpad_toggle:1;
1975 u16 zoom_toggle:1;
1976 u16 display_toggle:1;
1977 u16 thinklight_toggle:1;
1978 u16 hibernate_toggle:1;
1979 u16 displayexp_toggle:1;
1980 u16 display_state:1;
1981 u16 brightness_toggle:1;
1982 u16 volume_toggle:1;
1983 u16 mute:1;
1984
1985 u8 brightness_level;
1986 u8 volume_level;
1987 };
1988
1989 /* kthread for the hotkey poller */
1990 static struct task_struct *tpacpi_hotkey_task;
1991
1992 /*
1993 * Acquire mutex to write poller control variables as an
1994 * atomic block.
1995 *
1996 * Increment hotkey_config_change when changing them if you
1997 * want the kthread to forget old state.
1998 *
1999 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2000 */
2001 static struct mutex hotkey_thread_data_mutex;
2002 static unsigned int hotkey_config_change;
2003
2004 /*
2005 * hotkey poller control variables
2006 *
2007 * Must be atomic or readers will also need to acquire mutex
2008 *
2009 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2010 * should be used only when the changes need to be taken as
2011 * a block, OR when one needs to force the kthread to forget
2012 * old state.
2013 */
2014 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
2015 static unsigned int hotkey_poll_freq = 10; /* Hz */
2016
2017 #define HOTKEY_CONFIG_CRITICAL_START \
2018 do { \
2019 mutex_lock(&hotkey_thread_data_mutex); \
2020 hotkey_config_change++; \
2021 } while (0);
2022 #define HOTKEY_CONFIG_CRITICAL_END \
2023 mutex_unlock(&hotkey_thread_data_mutex);
2024
2025 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2026
2027 #define hotkey_source_mask 0U
2028 #define HOTKEY_CONFIG_CRITICAL_START
2029 #define HOTKEY_CONFIG_CRITICAL_END
2030
2031 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2032
2033 static struct mutex hotkey_mutex;
2034
2035 static enum { /* Reasons for waking up */
2036 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2037 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2038 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2039 } hotkey_wakeup_reason;
2040
2041 static int hotkey_autosleep_ack;
2042
2043 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2044 static u32 hotkey_all_mask; /* all events supported in fw */
2045 static u32 hotkey_reserved_mask; /* events better left disabled */
2046 static u32 hotkey_driver_mask; /* events needed by the driver */
2047 static u32 hotkey_user_mask; /* events visible to userspace */
2048 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2049
2050 static u16 *hotkey_keycode_map;
2051
2052 static struct attribute_set *hotkey_dev_attributes;
2053
2054 static void tpacpi_driver_event(const unsigned int hkey_event);
2055 static void hotkey_driver_event(const unsigned int scancode);
2056 static void hotkey_poll_setup(const bool may_warn);
2057
2058 /* HKEY.MHKG() return bits */
2059 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2060
2061 static int hotkey_get_wlsw(void)
2062 {
2063 int status;
2064
2065 if (!tp_features.hotkey_wlsw)
2066 return -ENODEV;
2067
2068 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2069 if (dbg_wlswemul)
2070 return (tpacpi_wlsw_emulstate) ?
2071 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2072 #endif
2073
2074 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2075 return -EIO;
2076
2077 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2078 }
2079
2080 static int hotkey_get_tablet_mode(int *status)
2081 {
2082 int s;
2083
2084 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2085 return -EIO;
2086
2087 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2088 return 0;
2089 }
2090
2091 /*
2092 * Reads current event mask from firmware, and updates
2093 * hotkey_acpi_mask accordingly. Also resets any bits
2094 * from hotkey_user_mask that are unavailable to be
2095 * delivered (shadow requirement of the userspace ABI).
2096 *
2097 * Call with hotkey_mutex held
2098 */
2099 static int hotkey_mask_get(void)
2100 {
2101 if (tp_features.hotkey_mask) {
2102 u32 m = 0;
2103
2104 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2105 return -EIO;
2106
2107 hotkey_acpi_mask = m;
2108 } else {
2109 /* no mask support doesn't mean no event support... */
2110 hotkey_acpi_mask = hotkey_all_mask;
2111 }
2112
2113 /* sync userspace-visible mask */
2114 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2115
2116 return 0;
2117 }
2118
2119 static void hotkey_mask_warn_incomplete_mask(void)
2120 {
2121 /* log only what the user can fix... */
2122 const u32 wantedmask = hotkey_driver_mask &
2123 ~(hotkey_acpi_mask | hotkey_source_mask) &
2124 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2125
2126 if (wantedmask)
2127 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2128 }
2129
2130 /*
2131 * Set the firmware mask when supported
2132 *
2133 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2134 *
2135 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2136 *
2137 * Call with hotkey_mutex held
2138 */
2139 static int hotkey_mask_set(u32 mask)
2140 {
2141 int i;
2142 int rc = 0;
2143
2144 const u32 fwmask = mask & ~hotkey_source_mask;
2145
2146 if (tp_features.hotkey_mask) {
2147 for (i = 0; i < 32; i++) {
2148 if (!acpi_evalf(hkey_handle,
2149 NULL, "MHKM", "vdd", i + 1,
2150 !!(mask & (1 << i)))) {
2151 rc = -EIO;
2152 break;
2153 }
2154 }
2155 }
2156
2157 /*
2158 * We *must* make an inconditional call to hotkey_mask_get to
2159 * refresh hotkey_acpi_mask and update hotkey_user_mask
2160 *
2161 * Take the opportunity to also log when we cannot _enable_
2162 * a given event.
2163 */
2164 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2165 pr_notice("asked for hotkey mask 0x%08x, but "
2166 "firmware forced it to 0x%08x\n",
2167 fwmask, hotkey_acpi_mask);
2168 }
2169
2170 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2171 hotkey_mask_warn_incomplete_mask();
2172
2173 return rc;
2174 }
2175
2176 /*
2177 * Sets hotkey_user_mask and tries to set the firmware mask
2178 *
2179 * Call with hotkey_mutex held
2180 */
2181 static int hotkey_user_mask_set(const u32 mask)
2182 {
2183 int rc;
2184
2185 /* Give people a chance to notice they are doing something that
2186 * is bound to go boom on their users sooner or later */
2187 if (!tp_warned.hotkey_mask_ff &&
2188 (mask == 0xffff || mask == 0xffffff ||
2189 mask == 0xffffffff)) {
2190 tp_warned.hotkey_mask_ff = 1;
2191 pr_notice("setting the hotkey mask to 0x%08x is likely "
2192 "not the best way to go about it\n", mask);
2193 pr_notice("please consider using the driver defaults, "
2194 "and refer to up-to-date thinkpad-acpi "
2195 "documentation\n");
2196 }
2197
2198 /* Try to enable what the user asked for, plus whatever we need.
2199 * this syncs everything but won't enable bits in hotkey_user_mask */
2200 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2201
2202 /* Enable the available bits in hotkey_user_mask */
2203 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2204
2205 return rc;
2206 }
2207
2208 /*
2209 * Sets the driver hotkey mask.
2210 *
2211 * Can be called even if the hotkey subdriver is inactive
2212 */
2213 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2214 {
2215 int rc;
2216
2217 /* Do the right thing if hotkey_init has not been called yet */
2218 if (!tp_features.hotkey) {
2219 hotkey_driver_mask = mask;
2220 return 0;
2221 }
2222
2223 mutex_lock(&hotkey_mutex);
2224
2225 HOTKEY_CONFIG_CRITICAL_START
2226 hotkey_driver_mask = mask;
2227 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2228 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2229 #endif
2230 HOTKEY_CONFIG_CRITICAL_END
2231
2232 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2233 ~hotkey_source_mask);
2234 hotkey_poll_setup(true);
2235
2236 mutex_unlock(&hotkey_mutex);
2237
2238 return rc;
2239 }
2240
2241 static int hotkey_status_get(int *status)
2242 {
2243 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2244 return -EIO;
2245
2246 return 0;
2247 }
2248
2249 static int hotkey_status_set(bool enable)
2250 {
2251 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2252 return -EIO;
2253
2254 return 0;
2255 }
2256
2257 static void tpacpi_input_send_tabletsw(void)
2258 {
2259 int state;
2260
2261 if (tp_features.hotkey_tablet &&
2262 !hotkey_get_tablet_mode(&state)) {
2263 mutex_lock(&tpacpi_inputdev_send_mutex);
2264
2265 input_report_switch(tpacpi_inputdev,
2266 SW_TABLET_MODE, !!state);
2267 input_sync(tpacpi_inputdev);
2268
2269 mutex_unlock(&tpacpi_inputdev_send_mutex);
2270 }
2271 }
2272
2273 /* Do NOT call without validating scancode first */
2274 static void tpacpi_input_send_key(const unsigned int scancode)
2275 {
2276 const unsigned int keycode = hotkey_keycode_map[scancode];
2277
2278 if (keycode != KEY_RESERVED) {
2279 mutex_lock(&tpacpi_inputdev_send_mutex);
2280
2281 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2282 input_report_key(tpacpi_inputdev, keycode, 1);
2283 input_sync(tpacpi_inputdev);
2284
2285 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2286 input_report_key(tpacpi_inputdev, keycode, 0);
2287 input_sync(tpacpi_inputdev);
2288
2289 mutex_unlock(&tpacpi_inputdev_send_mutex);
2290 }
2291 }
2292
2293 /* Do NOT call without validating scancode first */
2294 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2295 {
2296 hotkey_driver_event(scancode);
2297 if (hotkey_user_mask & (1 << scancode))
2298 tpacpi_input_send_key(scancode);
2299 }
2300
2301 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2302 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2303
2304 /* Do NOT call without validating scancode first */
2305 static void tpacpi_hotkey_send_key(unsigned int scancode)
2306 {
2307 tpacpi_input_send_key_masked(scancode);
2308 }
2309
2310 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2311 {
2312 u8 d;
2313
2314 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2315 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2316 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2317 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2318 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2319 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2320 }
2321 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2322 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2323 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2324 }
2325 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2326 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2327 n->displayexp_toggle =
2328 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2329 }
2330 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2331 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2332 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2333 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2334 n->brightness_toggle =
2335 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2336 }
2337 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2338 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2339 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2340 >> TP_NVRAM_POS_LEVEL_VOLUME;
2341 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2342 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2343 }
2344 }
2345
2346 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2347 do { \
2348 if ((event_mask & (1 << __scancode)) && \
2349 oldn->__member != newn->__member) \
2350 tpacpi_hotkey_send_key(__scancode); \
2351 } while (0)
2352
2353 #define TPACPI_MAY_SEND_KEY(__scancode) \
2354 do { \
2355 if (event_mask & (1 << __scancode)) \
2356 tpacpi_hotkey_send_key(__scancode); \
2357 } while (0)
2358
2359 static void issue_volchange(const unsigned int oldvol,
2360 const unsigned int newvol,
2361 const u32 event_mask)
2362 {
2363 unsigned int i = oldvol;
2364
2365 while (i > newvol) {
2366 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2367 i--;
2368 }
2369 while (i < newvol) {
2370 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2371 i++;
2372 }
2373 }
2374
2375 static void issue_brightnesschange(const unsigned int oldbrt,
2376 const unsigned int newbrt,
2377 const u32 event_mask)
2378 {
2379 unsigned int i = oldbrt;
2380
2381 while (i > newbrt) {
2382 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2383 i--;
2384 }
2385 while (i < newbrt) {
2386 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2387 i++;
2388 }
2389 }
2390
2391 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2392 struct tp_nvram_state *newn,
2393 const u32 event_mask)
2394 {
2395
2396 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2397 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2398 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2399 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2400
2401 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2402
2403 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2404
2405 /*
2406 * Handle volume
2407 *
2408 * This code is supposed to duplicate the IBM firmware behaviour:
2409 * - Pressing MUTE issues mute hotkey message, even when already mute
2410 * - Pressing Volume up/down issues volume up/down hotkey messages,
2411 * even when already at maximum or minimum volume
2412 * - The act of unmuting issues volume up/down notification,
2413 * depending which key was used to unmute
2414 *
2415 * We are constrained to what the NVRAM can tell us, which is not much
2416 * and certainly not enough if more than one volume hotkey was pressed
2417 * since the last poll cycle.
2418 *
2419 * Just to make our life interesting, some newer Lenovo ThinkPads have
2420 * bugs in the BIOS and may fail to update volume_toggle properly.
2421 */
2422 if (newn->mute) {
2423 /* muted */
2424 if (!oldn->mute ||
2425 oldn->volume_toggle != newn->volume_toggle ||
2426 oldn->volume_level != newn->volume_level) {
2427 /* recently muted, or repeated mute keypress, or
2428 * multiple presses ending in mute */
2429 issue_volchange(oldn->volume_level, newn->volume_level,
2430 event_mask);
2431 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2432 }
2433 } else {
2434 /* unmute */
2435 if (oldn->mute) {
2436 /* recently unmuted, issue 'unmute' keypress */
2437 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2438 }
2439 if (oldn->volume_level != newn->volume_level) {
2440 issue_volchange(oldn->volume_level, newn->volume_level,
2441 event_mask);
2442 } else if (oldn->volume_toggle != newn->volume_toggle) {
2443 /* repeated vol up/down keypress at end of scale ? */
2444 if (newn->volume_level == 0)
2445 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2446 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2447 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2448 }
2449 }
2450
2451 /* handle brightness */
2452 if (oldn->brightness_level != newn->brightness_level) {
2453 issue_brightnesschange(oldn->brightness_level,
2454 newn->brightness_level, event_mask);
2455 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2456 /* repeated key presses that didn't change state */
2457 if (newn->brightness_level == 0)
2458 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2459 else if (newn->brightness_level >= bright_maxlvl
2460 && !tp_features.bright_unkfw)
2461 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2462 }
2463
2464 #undef TPACPI_COMPARE_KEY
2465 #undef TPACPI_MAY_SEND_KEY
2466 }
2467
2468 /*
2469 * Polling driver
2470 *
2471 * We track all events in hotkey_source_mask all the time, since
2472 * most of them are edge-based. We only issue those requested by
2473 * hotkey_user_mask or hotkey_driver_mask, though.
2474 */
2475 static int hotkey_kthread(void *data)
2476 {
2477 struct tp_nvram_state s[2];
2478 u32 poll_mask, event_mask;
2479 unsigned int si, so;
2480 unsigned long t;
2481 unsigned int change_detector;
2482 unsigned int poll_freq;
2483 bool was_frozen;
2484
2485 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2486 goto exit;
2487
2488 set_freezable();
2489
2490 so = 0;
2491 si = 1;
2492 t = 0;
2493
2494 /* Initial state for compares */
2495 mutex_lock(&hotkey_thread_data_mutex);
2496 change_detector = hotkey_config_change;
2497 poll_mask = hotkey_source_mask;
2498 event_mask = hotkey_source_mask &
2499 (hotkey_driver_mask | hotkey_user_mask);
2500 poll_freq = hotkey_poll_freq;
2501 mutex_unlock(&hotkey_thread_data_mutex);
2502 hotkey_read_nvram(&s[so], poll_mask);
2503
2504 while (!kthread_should_stop()) {
2505 if (t == 0) {
2506 if (likely(poll_freq))
2507 t = 1000/poll_freq;
2508 else
2509 t = 100; /* should never happen... */
2510 }
2511 t = msleep_interruptible(t);
2512 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2513 break;
2514
2515 if (t > 0 && !was_frozen)
2516 continue;
2517
2518 mutex_lock(&hotkey_thread_data_mutex);
2519 if (was_frozen || hotkey_config_change != change_detector) {
2520 /* forget old state on thaw or config change */
2521 si = so;
2522 t = 0;
2523 change_detector = hotkey_config_change;
2524 }
2525 poll_mask = hotkey_source_mask;
2526 event_mask = hotkey_source_mask &
2527 (hotkey_driver_mask | hotkey_user_mask);
2528 poll_freq = hotkey_poll_freq;
2529 mutex_unlock(&hotkey_thread_data_mutex);
2530
2531 if (likely(poll_mask)) {
2532 hotkey_read_nvram(&s[si], poll_mask);
2533 if (likely(si != so)) {
2534 hotkey_compare_and_issue_event(&s[so], &s[si],
2535 event_mask);
2536 }
2537 }
2538
2539 so = si;
2540 si ^= 1;
2541 }
2542
2543 exit:
2544 return 0;
2545 }
2546
2547 /* call with hotkey_mutex held */
2548 static void hotkey_poll_stop_sync(void)
2549 {
2550 if (tpacpi_hotkey_task) {
2551 kthread_stop(tpacpi_hotkey_task);
2552 tpacpi_hotkey_task = NULL;
2553 }
2554 }
2555
2556 /* call with hotkey_mutex held */
2557 static void hotkey_poll_setup(const bool may_warn)
2558 {
2559 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2560 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2561
2562 if (hotkey_poll_freq > 0 &&
2563 (poll_driver_mask ||
2564 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2565 if (!tpacpi_hotkey_task) {
2566 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2567 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2568 if (IS_ERR(tpacpi_hotkey_task)) {
2569 tpacpi_hotkey_task = NULL;
2570 pr_err("could not create kernel thread "
2571 "for hotkey polling\n");
2572 }
2573 }
2574 } else {
2575 hotkey_poll_stop_sync();
2576 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2577 hotkey_poll_freq == 0) {
2578 pr_notice("hot keys 0x%08x and/or events 0x%08x "
2579 "require polling, which is currently "
2580 "disabled\n",
2581 poll_user_mask, poll_driver_mask);
2582 }
2583 }
2584 }
2585
2586 static void hotkey_poll_setup_safe(const bool may_warn)
2587 {
2588 mutex_lock(&hotkey_mutex);
2589 hotkey_poll_setup(may_warn);
2590 mutex_unlock(&hotkey_mutex);
2591 }
2592
2593 /* call with hotkey_mutex held */
2594 static void hotkey_poll_set_freq(unsigned int freq)
2595 {
2596 if (!freq)
2597 hotkey_poll_stop_sync();
2598
2599 hotkey_poll_freq = freq;
2600 }
2601
2602 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2603
2604 static void hotkey_poll_setup(const bool __unused)
2605 {
2606 }
2607
2608 static void hotkey_poll_setup_safe(const bool __unused)
2609 {
2610 }
2611
2612 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2613
2614 static int hotkey_inputdev_open(struct input_dev *dev)
2615 {
2616 switch (tpacpi_lifecycle) {
2617 case TPACPI_LIFE_INIT:
2618 case TPACPI_LIFE_RUNNING:
2619 hotkey_poll_setup_safe(false);
2620 return 0;
2621 case TPACPI_LIFE_EXITING:
2622 return -EBUSY;
2623 }
2624
2625 /* Should only happen if tpacpi_lifecycle is corrupt */
2626 BUG();
2627 return -EBUSY;
2628 }
2629
2630 static void hotkey_inputdev_close(struct input_dev *dev)
2631 {
2632 /* disable hotkey polling when possible */
2633 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2634 !(hotkey_source_mask & hotkey_driver_mask))
2635 hotkey_poll_setup_safe(false);
2636 }
2637
2638 /* sysfs hotkey enable ------------------------------------------------- */
2639 static ssize_t hotkey_enable_show(struct device *dev,
2640 struct device_attribute *attr,
2641 char *buf)
2642 {
2643 int res, status;
2644
2645 printk_deprecated_attribute("hotkey_enable",
2646 "Hotkey reporting is always enabled");
2647
2648 res = hotkey_status_get(&status);
2649 if (res)
2650 return res;
2651
2652 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2653 }
2654
2655 static ssize_t hotkey_enable_store(struct device *dev,
2656 struct device_attribute *attr,
2657 const char *buf, size_t count)
2658 {
2659 unsigned long t;
2660
2661 printk_deprecated_attribute("hotkey_enable",
2662 "Hotkeys can be disabled through hotkey_mask");
2663
2664 if (parse_strtoul(buf, 1, &t))
2665 return -EINVAL;
2666
2667 if (t == 0)
2668 return -EPERM;
2669
2670 return count;
2671 }
2672
2673 static DEVICE_ATTR_RW(hotkey_enable);
2674
2675 /* sysfs hotkey mask --------------------------------------------------- */
2676 static ssize_t hotkey_mask_show(struct device *dev,
2677 struct device_attribute *attr,
2678 char *buf)
2679 {
2680 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2681 }
2682
2683 static ssize_t hotkey_mask_store(struct device *dev,
2684 struct device_attribute *attr,
2685 const char *buf, size_t count)
2686 {
2687 unsigned long t;
2688 int res;
2689
2690 if (parse_strtoul(buf, 0xffffffffUL, &t))
2691 return -EINVAL;
2692
2693 if (mutex_lock_killable(&hotkey_mutex))
2694 return -ERESTARTSYS;
2695
2696 res = hotkey_user_mask_set(t);
2697
2698 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2699 hotkey_poll_setup(true);
2700 #endif
2701
2702 mutex_unlock(&hotkey_mutex);
2703
2704 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2705
2706 return (res) ? res : count;
2707 }
2708
2709 static DEVICE_ATTR_RW(hotkey_mask);
2710
2711 /* sysfs hotkey bios_enabled ------------------------------------------- */
2712 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2713 struct device_attribute *attr,
2714 char *buf)
2715 {
2716 return sprintf(buf, "0\n");
2717 }
2718
2719 static DEVICE_ATTR_RO(hotkey_bios_enabled);
2720
2721 /* sysfs hotkey bios_mask ---------------------------------------------- */
2722 static ssize_t hotkey_bios_mask_show(struct device *dev,
2723 struct device_attribute *attr,
2724 char *buf)
2725 {
2726 printk_deprecated_attribute("hotkey_bios_mask",
2727 "This attribute is useless.");
2728 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2729 }
2730
2731 static DEVICE_ATTR_RO(hotkey_bios_mask);
2732
2733 /* sysfs hotkey all_mask ----------------------------------------------- */
2734 static ssize_t hotkey_all_mask_show(struct device *dev,
2735 struct device_attribute *attr,
2736 char *buf)
2737 {
2738 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2739 hotkey_all_mask | hotkey_source_mask);
2740 }
2741
2742 static DEVICE_ATTR_RO(hotkey_all_mask);
2743
2744 /* sysfs hotkey recommended_mask --------------------------------------- */
2745 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2746 struct device_attribute *attr,
2747 char *buf)
2748 {
2749 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2750 (hotkey_all_mask | hotkey_source_mask)
2751 & ~hotkey_reserved_mask);
2752 }
2753
2754 static DEVICE_ATTR_RO(hotkey_recommended_mask);
2755
2756 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2757
2758 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2759 static ssize_t hotkey_source_mask_show(struct device *dev,
2760 struct device_attribute *attr,
2761 char *buf)
2762 {
2763 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2764 }
2765
2766 static ssize_t hotkey_source_mask_store(struct device *dev,
2767 struct device_attribute *attr,
2768 const char *buf, size_t count)
2769 {
2770 unsigned long t;
2771 u32 r_ev;
2772 int rc;
2773
2774 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2775 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2776 return -EINVAL;
2777
2778 if (mutex_lock_killable(&hotkey_mutex))
2779 return -ERESTARTSYS;
2780
2781 HOTKEY_CONFIG_CRITICAL_START
2782 hotkey_source_mask = t;
2783 HOTKEY_CONFIG_CRITICAL_END
2784
2785 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2786 ~hotkey_source_mask);
2787 hotkey_poll_setup(true);
2788
2789 /* check if events needed by the driver got disabled */
2790 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2791 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2792
2793 mutex_unlock(&hotkey_mutex);
2794
2795 if (rc < 0)
2796 pr_err("hotkey_source_mask: "
2797 "failed to update the firmware event mask!\n");
2798
2799 if (r_ev)
2800 pr_notice("hotkey_source_mask: "
2801 "some important events were disabled: 0x%04x\n",
2802 r_ev);
2803
2804 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2805
2806 return (rc < 0) ? rc : count;
2807 }
2808
2809 static DEVICE_ATTR_RW(hotkey_source_mask);
2810
2811 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2812 static ssize_t hotkey_poll_freq_show(struct device *dev,
2813 struct device_attribute *attr,
2814 char *buf)
2815 {
2816 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2817 }
2818
2819 static ssize_t hotkey_poll_freq_store(struct device *dev,
2820 struct device_attribute *attr,
2821 const char *buf, size_t count)
2822 {
2823 unsigned long t;
2824
2825 if (parse_strtoul(buf, 25, &t))
2826 return -EINVAL;
2827
2828 if (mutex_lock_killable(&hotkey_mutex))
2829 return -ERESTARTSYS;
2830
2831 hotkey_poll_set_freq(t);
2832 hotkey_poll_setup(true);
2833
2834 mutex_unlock(&hotkey_mutex);
2835
2836 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2837
2838 return count;
2839 }
2840
2841 static DEVICE_ATTR_RW(hotkey_poll_freq);
2842
2843 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2844
2845 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2846 static ssize_t hotkey_radio_sw_show(struct device *dev,
2847 struct device_attribute *attr,
2848 char *buf)
2849 {
2850 int res;
2851 res = hotkey_get_wlsw();
2852 if (res < 0)
2853 return res;
2854
2855 /* Opportunistic update */
2856 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2857
2858 return snprintf(buf, PAGE_SIZE, "%d\n",
2859 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2860 }
2861
2862 static DEVICE_ATTR_RO(hotkey_radio_sw);
2863
2864 static void hotkey_radio_sw_notify_change(void)
2865 {
2866 if (tp_features.hotkey_wlsw)
2867 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2868 "hotkey_radio_sw");
2869 }
2870
2871 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2872 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2873 struct device_attribute *attr,
2874 char *buf)
2875 {
2876 int res, s;
2877 res = hotkey_get_tablet_mode(&s);
2878 if (res < 0)
2879 return res;
2880
2881 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2882 }
2883
2884 static DEVICE_ATTR_RO(hotkey_tablet_mode);
2885
2886 static void hotkey_tablet_mode_notify_change(void)
2887 {
2888 if (tp_features.hotkey_tablet)
2889 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2890 "hotkey_tablet_mode");
2891 }
2892
2893 /* sysfs wakeup reason (pollable) -------------------------------------- */
2894 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2895 struct device_attribute *attr,
2896 char *buf)
2897 {
2898 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2899 }
2900
2901 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2902
2903 static void hotkey_wakeup_reason_notify_change(void)
2904 {
2905 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2906 "wakeup_reason");
2907 }
2908
2909 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2910 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2911 struct device_attribute *attr,
2912 char *buf)
2913 {
2914 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2915 }
2916
2917 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
2918 hotkey_wakeup_hotunplug_complete_show, NULL);
2919
2920 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2921 {
2922 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2923 "wakeup_hotunplug_complete");
2924 }
2925
2926 /* sysfs adaptive kbd mode --------------------------------------------- */
2927
2928 static int adaptive_keyboard_get_mode(void);
2929 static int adaptive_keyboard_set_mode(int new_mode);
2930
2931 enum ADAPTIVE_KEY_MODE {
2932 HOME_MODE,
2933 WEB_BROWSER_MODE,
2934 WEB_CONFERENCE_MODE,
2935 FUNCTION_MODE,
2936 LAYFLAT_MODE
2937 };
2938
2939 static ssize_t adaptive_kbd_mode_show(struct device *dev,
2940 struct device_attribute *attr,
2941 char *buf)
2942 {
2943 int current_mode;
2944
2945 current_mode = adaptive_keyboard_get_mode();
2946 if (current_mode < 0)
2947 return current_mode;
2948
2949 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode);
2950 }
2951
2952 static ssize_t adaptive_kbd_mode_store(struct device *dev,
2953 struct device_attribute *attr,
2954 const char *buf, size_t count)
2955 {
2956 unsigned long t;
2957 int res;
2958
2959 if (parse_strtoul(buf, LAYFLAT_MODE, &t))
2960 return -EINVAL;
2961
2962 res = adaptive_keyboard_set_mode(t);
2963 return (res < 0) ? res : count;
2964 }
2965
2966 static DEVICE_ATTR_RW(adaptive_kbd_mode);
2967
2968 static struct attribute *adaptive_kbd_attributes[] = {
2969 &dev_attr_adaptive_kbd_mode.attr,
2970 NULL
2971 };
2972
2973 static const struct attribute_group adaptive_kbd_attr_group = {
2974 .attrs = adaptive_kbd_attributes,
2975 };
2976
2977 /* --------------------------------------------------------------------- */
2978
2979 static struct attribute *hotkey_attributes[] __initdata = {
2980 &dev_attr_hotkey_enable.attr,
2981 &dev_attr_hotkey_bios_enabled.attr,
2982 &dev_attr_hotkey_bios_mask.attr,
2983 &dev_attr_wakeup_reason.attr,
2984 &dev_attr_wakeup_hotunplug_complete.attr,
2985 &dev_attr_hotkey_mask.attr,
2986 &dev_attr_hotkey_all_mask.attr,
2987 &dev_attr_hotkey_recommended_mask.attr,
2988 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2989 &dev_attr_hotkey_source_mask.attr,
2990 &dev_attr_hotkey_poll_freq.attr,
2991 #endif
2992 };
2993
2994 /*
2995 * Sync both the hw and sw blocking state of all switches
2996 */
2997 static void tpacpi_send_radiosw_update(void)
2998 {
2999 int wlsw;
3000
3001 /*
3002 * We must sync all rfkill controllers *before* issuing any
3003 * rfkill input events, or we will race the rfkill core input
3004 * handler.
3005 *
3006 * tpacpi_inputdev_send_mutex works as a synchronization point
3007 * for the above.
3008 *
3009 * We optimize to avoid numerous calls to hotkey_get_wlsw.
3010 */
3011
3012 wlsw = hotkey_get_wlsw();
3013
3014 /* Sync hw blocking state first if it is hw-blocked */
3015 if (wlsw == TPACPI_RFK_RADIO_OFF)
3016 tpacpi_rfk_update_hwblock_state(true);
3017
3018 /* Sync sw blocking state */
3019 tpacpi_rfk_update_swstate_all();
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
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
3051 if (hotkey_dev_attributes)
3052 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3053
3054 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3055 "restoring original HKEY status and mask\n");
3056 /* yes, there is a bitwise or below, we want the
3057 * functions to be called even if one of them fail */
3058 if (((tp_features.hotkey_mask &&
3059 hotkey_mask_set(hotkey_orig_mask)) |
3060 hotkey_status_set(false)) != 0)
3061 pr_err("failed to restore hot key mask "
3062 "to BIOS defaults\n");
3063 }
3064
3065 static void __init hotkey_unmap(const unsigned int scancode)
3066 {
3067 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3068 clear_bit(hotkey_keycode_map[scancode],
3069 tpacpi_inputdev->keybit);
3070 hotkey_keycode_map[scancode] = KEY_RESERVED;
3071 }
3072 }
3073
3074 /*
3075 * HKEY quirks:
3076 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3077 */
3078
3079 #define TPACPI_HK_Q_INIMASK 0x0001
3080
3081 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3082 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3083 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3084 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3085 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3086 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3087 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3088 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3089 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3090 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3091 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3092 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3093 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3094 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3095 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3096 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3097 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3098 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3099 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3100 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3101 };
3102
3103 typedef u16 tpacpi_keymap_entry_t;
3104 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3105
3106 static int __init hotkey_init(struct ibm_init_struct *iibm)
3107 {
3108 /* Requirements for changing the default keymaps:
3109 *
3110 * 1. Many of the keys are mapped to KEY_RESERVED for very
3111 * good reasons. Do not change them unless you have deep
3112 * knowledge on the IBM and Lenovo ThinkPad firmware for
3113 * the various ThinkPad models. The driver behaves
3114 * differently for KEY_RESERVED: such keys have their
3115 * hot key mask *unset* in mask_recommended, and also
3116 * in the initial hot key mask programmed into the
3117 * firmware at driver load time, which means the firm-
3118 * ware may react very differently if you change them to
3119 * something else;
3120 *
3121 * 2. You must be subscribed to the linux-thinkpad and
3122 * ibm-acpi-devel mailing lists, and you should read the
3123 * list archives since 2007 if you want to change the
3124 * keymaps. This requirement exists so that you will
3125 * know the past history of problems with the thinkpad-
3126 * acpi driver keymaps, and also that you will be
3127 * listening to any bug reports;
3128 *
3129 * 3. Do not send thinkpad-acpi specific patches directly to
3130 * for merging, *ever*. Send them to the linux-acpi
3131 * mailinglist for comments. Merging is to be done only
3132 * through acpi-test and the ACPI maintainer.
3133 *
3134 * If the above is too much to ask, don't change the keymap.
3135 * Ask the thinkpad-acpi maintainer to do it, instead.
3136 */
3137
3138 enum keymap_index {
3139 TPACPI_KEYMAP_IBM_GENERIC = 0,
3140 TPACPI_KEYMAP_LENOVO_GENERIC,
3141 };
3142
3143 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3144 /* Generic keymap for IBM ThinkPads */
3145 [TPACPI_KEYMAP_IBM_GENERIC] = {
3146 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3147 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3148 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3149 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3150
3151 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3152 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3153 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3154 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3155
3156 /* brightness: firmware always reacts to them */
3157 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3158 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3159
3160 /* Thinklight: firmware always react to it */
3161 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3162
3163 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3164 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3165
3166 /* Volume: firmware always react to it and reprograms
3167 * the built-in *extra* mixer. Never map it to control
3168 * another mixer by default. */
3169 KEY_RESERVED, /* 0x14: VOLUME UP */
3170 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3171 KEY_RESERVED, /* 0x16: MUTE */
3172
3173 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3174
3175 /* (assignments unknown, please report if found) */
3176 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3177 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3178
3179 /* No assignments, only used for Adaptive keyboards. */
3180 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3181 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3182 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3183 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3184 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3185 },
3186
3187 /* Generic keymap for Lenovo ThinkPads */
3188 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3189 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3190 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3191 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3192 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3193
3194 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3195 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3196 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3197 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3198
3199 /* These should be enabled --only-- when ACPI video
3200 * is disabled (i.e. in "vendor" mode), and are handled
3201 * in a special way by the init code */
3202 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3203 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3204
3205 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3206
3207 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3208 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3209
3210 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3211 * react to it and reprograms the built-in *extra* mixer.
3212 * Never map it to control another mixer by default.
3213 *
3214 * T60?, T61, R60?, R61: firmware and EC tries to send
3215 * these over the regular keyboard, so these are no-ops,
3216 * but there are still weird bugs re. MUTE, so do not
3217 * change unless you get test reports from all Lenovo
3218 * models. May cause the BIOS to interfere with the
3219 * HDA mixer.
3220 */
3221 KEY_RESERVED, /* 0x14: VOLUME UP */
3222 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3223 KEY_RESERVED, /* 0x16: MUTE */
3224
3225 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3226
3227 /* (assignments unknown, please report if found) */
3228 KEY_UNKNOWN, KEY_UNKNOWN,
3229
3230 /*
3231 * The mic mute button only sends 0x1a. It does not
3232 * automatically mute the mic or change the mute light.
3233 */
3234 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3235
3236 /* (assignments unknown, please report if found) */
3237 KEY_UNKNOWN,
3238
3239 /* Extra keys in use since the X240 / T440 / T540 */
3240 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3241
3242 /*
3243 * These are the adaptive keyboard keycodes for Carbon X1 2014.
3244 * The first item in this list is the Mute button which is
3245 * emitted with 0x103 through
3246 * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3247 * symbol is held.
3248 * We'll need to offset those by 0x20.
3249 */
3250 KEY_RESERVED, /* Mute held, 0x103 */
3251 KEY_BRIGHTNESS_MIN, /* Backlight off */
3252 KEY_RESERVED, /* Clipping tool */
3253 KEY_RESERVED, /* Cloud */
3254 KEY_RESERVED,
3255 KEY_VOICECOMMAND, /* Voice */
3256 KEY_RESERVED,
3257 KEY_RESERVED, /* Gestures */
3258 KEY_RESERVED,
3259 KEY_RESERVED,
3260 KEY_RESERVED,
3261 KEY_CONFIG, /* Settings */
3262 KEY_RESERVED, /* New tab */
3263 KEY_REFRESH, /* Reload */
3264 KEY_BACK, /* Back */
3265 KEY_RESERVED, /* Microphone down */
3266 KEY_RESERVED, /* Microphone up */
3267 KEY_RESERVED, /* Microphone cancellation */
3268 KEY_RESERVED, /* Camera mode */
3269 KEY_RESERVED, /* Rotate display, 0x116 */
3270 },
3271 };
3272
3273 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3274 /* Generic maps (fallback) */
3275 {
3276 .vendor = PCI_VENDOR_ID_IBM,
3277 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3278 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3279 },
3280 {
3281 .vendor = PCI_VENDOR_ID_LENOVO,
3282 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3283 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3284 },
3285 };
3286
3287 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3288 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3289
3290 int res, i;
3291 int status;
3292 int hkeyv;
3293 bool radiosw_state = false;
3294 bool tabletsw_state = false;
3295
3296 unsigned long quirks;
3297 unsigned long keymap_id;
3298
3299 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3300 "initializing hotkey subdriver\n");
3301
3302 BUG_ON(!tpacpi_inputdev);
3303 BUG_ON(tpacpi_inputdev->open != NULL ||
3304 tpacpi_inputdev->close != NULL);
3305
3306 TPACPI_ACPIHANDLE_INIT(hkey);
3307 mutex_init(&hotkey_mutex);
3308
3309 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3310 mutex_init(&hotkey_thread_data_mutex);
3311 #endif
3312
3313 /* hotkey not supported on 570 */
3314 tp_features.hotkey = hkey_handle != NULL;
3315
3316 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3317 "hotkeys are %s\n",
3318 str_supported(tp_features.hotkey));
3319
3320 if (!tp_features.hotkey)
3321 return 1;
3322
3323 /*
3324 * Check if we have an adaptive keyboard, like on the
3325 * Lenovo Carbon X1 2014 (2nd Gen).
3326 */
3327 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3328 if ((hkeyv >> 8) == 2) {
3329 tp_features.has_adaptive_kbd = true;
3330 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3331 &adaptive_kbd_attr_group);
3332 if (res)
3333 goto err_exit;
3334 }
3335 }
3336
3337 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3338 ARRAY_SIZE(tpacpi_hotkey_qtable));
3339
3340 tpacpi_disable_brightness_delay();
3341
3342 /* MUST have enough space for all attributes to be added to
3343 * hotkey_dev_attributes */
3344 hotkey_dev_attributes = create_attr_set(
3345 ARRAY_SIZE(hotkey_attributes) + 2,
3346 NULL);
3347 if (!hotkey_dev_attributes)
3348 return -ENOMEM;
3349 res = add_many_to_attr_set(hotkey_dev_attributes,
3350 hotkey_attributes,
3351 ARRAY_SIZE(hotkey_attributes));
3352 if (res)
3353 goto err_exit;
3354
3355 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3356 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3357 for HKEY interface version 0x100 */
3358 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3359 if ((hkeyv >> 8) != 1) {
3360 pr_err("unknown version of the HKEY interface: 0x%x\n",
3361 hkeyv);
3362 pr_err("please report this to %s\n", TPACPI_MAIL);
3363 } else {
3364 /*
3365 * MHKV 0x100 in A31, R40, R40e,
3366 * T4x, X31, and later
3367 */
3368 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3369 "firmware HKEY interface version: 0x%x\n",
3370 hkeyv);
3371
3372 /* Paranoia check AND init hotkey_all_mask */
3373 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3374 "MHKA", "qd")) {
3375 pr_err("missing MHKA handler, "
3376 "please report this to %s\n",
3377 TPACPI_MAIL);
3378 /* Fallback: pre-init for FN+F3,F4,F12 */
3379 hotkey_all_mask = 0x080cU;
3380 } else {
3381 tp_features.hotkey_mask = 1;
3382 }
3383 }
3384 }
3385
3386 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3387 "hotkey masks are %s\n",
3388 str_supported(tp_features.hotkey_mask));
3389
3390 /* Init hotkey_all_mask if not initialized yet */
3391 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3392 (quirks & TPACPI_HK_Q_INIMASK))
3393 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3394
3395 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3396 if (tp_features.hotkey_mask) {
3397 /* hotkey_source_mask *must* be zero for
3398 * the first hotkey_mask_get to return hotkey_orig_mask */
3399 res = hotkey_mask_get();
3400 if (res)
3401 goto err_exit;
3402
3403 hotkey_orig_mask = hotkey_acpi_mask;
3404 } else {
3405 hotkey_orig_mask = hotkey_all_mask;
3406 hotkey_acpi_mask = hotkey_all_mask;
3407 }
3408
3409 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3410 if (dbg_wlswemul) {
3411 tp_features.hotkey_wlsw = 1;
3412 radiosw_state = !!tpacpi_wlsw_emulstate;
3413 pr_info("radio switch emulation enabled\n");
3414 } else
3415 #endif
3416 /* Not all thinkpads have a hardware radio switch */
3417 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3418 tp_features.hotkey_wlsw = 1;
3419 radiosw_state = !!status;
3420 pr_info("radio switch found; radios are %s\n",
3421 enabled(status, 0));
3422 }
3423 if (tp_features.hotkey_wlsw)
3424 res = add_to_attr_set(hotkey_dev_attributes,
3425 &dev_attr_hotkey_radio_sw.attr);
3426
3427 /* For X41t, X60t, X61t Tablets... */
3428 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3429 tp_features.hotkey_tablet = 1;
3430 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3431 pr_info("possible tablet mode switch found; "
3432 "ThinkPad in %s mode\n",
3433 (tabletsw_state) ? "tablet" : "laptop");
3434 res = add_to_attr_set(hotkey_dev_attributes,
3435 &dev_attr_hotkey_tablet_mode.attr);
3436 }
3437
3438 if (!res)
3439 res = register_attr_set_with_sysfs(
3440 hotkey_dev_attributes,
3441 &tpacpi_pdev->dev.kobj);
3442 if (res)
3443 goto err_exit;
3444
3445 /* Set up key map */
3446 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3447 GFP_KERNEL);
3448 if (!hotkey_keycode_map) {
3449 pr_err("failed to allocate memory for key map\n");
3450 res = -ENOMEM;
3451 goto err_exit;
3452 }
3453
3454 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3455 ARRAY_SIZE(tpacpi_keymap_qtable));
3456 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3457 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3458 "using keymap number %lu\n", keymap_id);
3459
3460 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3461 TPACPI_HOTKEY_MAP_SIZE);
3462
3463 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3464 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3465 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3466 tpacpi_inputdev->keycode = hotkey_keycode_map;
3467 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3468 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3469 input_set_capability(tpacpi_inputdev, EV_KEY,
3470 hotkey_keycode_map[i]);
3471 } else {
3472 if (i < sizeof(hotkey_reserved_mask)*8)
3473 hotkey_reserved_mask |= 1 << i;
3474 }
3475 }
3476
3477 if (tp_features.hotkey_wlsw) {
3478 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3479 input_report_switch(tpacpi_inputdev,
3480 SW_RFKILL_ALL, radiosw_state);
3481 }
3482 if (tp_features.hotkey_tablet) {
3483 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3484 input_report_switch(tpacpi_inputdev,
3485 SW_TABLET_MODE, tabletsw_state);
3486 }
3487
3488 /* Do not issue duplicate brightness change events to
3489 * userspace. tpacpi_detect_brightness_capabilities() must have
3490 * been called before this point */
3491 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3492 pr_info("This ThinkPad has standard ACPI backlight "
3493 "brightness control, supported by the ACPI "
3494 "video driver\n");
3495 pr_notice("Disabling thinkpad-acpi brightness events "
3496 "by default...\n");
3497
3498 /* Disable brightness up/down on Lenovo thinkpads when
3499 * ACPI is handling them, otherwise it is plain impossible
3500 * for userspace to do something even remotely sane */
3501 hotkey_reserved_mask |=
3502 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3503 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3504 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3505 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3506 }
3507
3508 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3509 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3510 & ~hotkey_all_mask
3511 & ~hotkey_reserved_mask;
3512
3513 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3514 "hotkey source mask 0x%08x, polling freq %u\n",
3515 hotkey_source_mask, hotkey_poll_freq);
3516 #endif
3517
3518 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3519 "enabling firmware HKEY event interface...\n");
3520 res = hotkey_status_set(true);
3521 if (res) {
3522 hotkey_exit();
3523 return res;
3524 }
3525 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3526 | hotkey_driver_mask)
3527 & ~hotkey_source_mask);
3528 if (res < 0 && res != -ENXIO) {
3529 hotkey_exit();
3530 return res;
3531 }
3532 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3533 & ~hotkey_reserved_mask;
3534 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3535 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3536 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3537
3538 tpacpi_inputdev->open = &hotkey_inputdev_open;
3539 tpacpi_inputdev->close = &hotkey_inputdev_close;
3540
3541 hotkey_poll_setup_safe(true);
3542
3543 return 0;
3544
3545 err_exit:
3546 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3547 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3548 &adaptive_kbd_attr_group);
3549
3550 hotkey_dev_attributes = NULL;
3551
3552 return (res < 0) ? res : 1;
3553 }
3554
3555 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3556 * mode, Web conference mode, Function mode and Lay-flat mode.
3557 * We support Home mode and Function mode currently.
3558 *
3559 * Will consider support rest of modes in future.
3560 *
3561 */
3562 static const int adaptive_keyboard_modes[] = {
3563 HOME_MODE,
3564 /* WEB_BROWSER_MODE = 2,
3565 WEB_CONFERENCE_MODE = 3, */
3566 FUNCTION_MODE
3567 };
3568
3569 #define DFR_CHANGE_ROW 0x101
3570 #define DFR_SHOW_QUICKVIEW_ROW 0x102
3571 #define FIRST_ADAPTIVE_KEY 0x103
3572 #define ADAPTIVE_KEY_OFFSET 0x020
3573
3574 /* press Fn key a while second, it will switch to Function Mode. Then
3575 * release Fn key, previous mode be restored.
3576 */
3577 static bool adaptive_keyboard_mode_is_saved;
3578 static int adaptive_keyboard_prev_mode;
3579
3580 static int adaptive_keyboard_get_mode(void)
3581 {
3582 int mode = 0;
3583
3584 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3585 pr_err("Cannot read adaptive keyboard mode\n");
3586 return -EIO;
3587 }
3588
3589 return mode;
3590 }
3591
3592 static int adaptive_keyboard_set_mode(int new_mode)
3593 {
3594 if (new_mode < 0 ||
3595 new_mode > LAYFLAT_MODE)
3596 return -EINVAL;
3597
3598 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3599 pr_err("Cannot set adaptive keyboard mode\n");
3600 return -EIO;
3601 }
3602
3603 return 0;
3604 }
3605
3606 static int adaptive_keyboard_get_next_mode(int mode)
3607 {
3608 size_t i;
3609 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3610
3611 for (i = 0; i <= max_mode; i++) {
3612 if (adaptive_keyboard_modes[i] == mode)
3613 break;
3614 }
3615
3616 if (i >= max_mode)
3617 i = 0;
3618 else
3619 i++;
3620
3621 return adaptive_keyboard_modes[i];
3622 }
3623
3624 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3625 {
3626 int current_mode = 0;
3627 int new_mode = 0;
3628 int keycode;
3629
3630 switch (scancode) {
3631 case DFR_CHANGE_ROW:
3632 if (adaptive_keyboard_mode_is_saved) {
3633 new_mode = adaptive_keyboard_prev_mode;
3634 adaptive_keyboard_mode_is_saved = false;
3635 } else {
3636 current_mode = adaptive_keyboard_get_mode();
3637 if (current_mode < 0)
3638 return false;
3639 new_mode = adaptive_keyboard_get_next_mode(
3640 current_mode);
3641 }
3642
3643 if (adaptive_keyboard_set_mode(new_mode) < 0)
3644 return false;
3645
3646 return true;
3647
3648 case DFR_SHOW_QUICKVIEW_ROW:
3649 current_mode = adaptive_keyboard_get_mode();
3650 if (current_mode < 0)
3651 return false;
3652
3653 adaptive_keyboard_prev_mode = current_mode;
3654 adaptive_keyboard_mode_is_saved = true;
3655
3656 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3657 return false;
3658 return true;
3659
3660 default:
3661 if (scancode < FIRST_ADAPTIVE_KEY ||
3662 scancode >= FIRST_ADAPTIVE_KEY + TPACPI_HOTKEY_MAP_LEN -
3663 ADAPTIVE_KEY_OFFSET) {
3664 pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3665 scancode);
3666 return false;
3667 }
3668 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + ADAPTIVE_KEY_OFFSET];
3669 if (keycode != KEY_RESERVED) {
3670 mutex_lock(&tpacpi_inputdev_send_mutex);
3671
3672 input_report_key(tpacpi_inputdev, keycode, 1);
3673 input_sync(tpacpi_inputdev);
3674
3675 input_report_key(tpacpi_inputdev, keycode, 0);
3676 input_sync(tpacpi_inputdev);
3677
3678 mutex_unlock(&tpacpi_inputdev_send_mutex);
3679 }
3680 return true;
3681 }
3682 }
3683
3684 static bool hotkey_notify_hotkey(const u32 hkey,
3685 bool *send_acpi_ev,
3686 bool *ignore_acpi_ev)
3687 {
3688 /* 0x1000-0x1FFF: key presses */
3689 unsigned int scancode = hkey & 0xfff;
3690 *send_acpi_ev = true;
3691 *ignore_acpi_ev = false;
3692
3693 /* HKEY event 0x1001 is scancode 0x00 */
3694 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3695 scancode--;
3696 if (!(hotkey_source_mask & (1 << scancode))) {
3697 tpacpi_input_send_key_masked(scancode);
3698 *send_acpi_ev = false;
3699 } else {
3700 *ignore_acpi_ev = true;
3701 }
3702 return true;
3703 } else {
3704 return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3705 }
3706 return false;
3707 }
3708
3709 static bool hotkey_notify_wakeup(const u32 hkey,
3710 bool *send_acpi_ev,
3711 bool *ignore_acpi_ev)
3712 {
3713 /* 0x2000-0x2FFF: Wakeup reason */
3714 *send_acpi_ev = true;
3715 *ignore_acpi_ev = false;
3716
3717 switch (hkey) {
3718 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3719 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3720 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3721 *ignore_acpi_ev = true;
3722 break;
3723
3724 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3725 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3726 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3727 *ignore_acpi_ev = true;
3728 break;
3729
3730 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3731 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3732 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3733 /* how to auto-heal: */
3734 /* 2313: woke up from S3, go to S4/S5 */
3735 /* 2413: woke up from S4, go to S5 */
3736 break;
3737
3738 default:
3739 return false;
3740 }
3741
3742 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3743 pr_info("woke up due to a hot-unplug request...\n");
3744 hotkey_wakeup_reason_notify_change();
3745 }
3746 return true;
3747 }
3748
3749 static bool hotkey_notify_dockevent(const u32 hkey,
3750 bool *send_acpi_ev,
3751 bool *ignore_acpi_ev)
3752 {
3753 /* 0x4000-0x4FFF: dock-related events */
3754 *send_acpi_ev = true;
3755 *ignore_acpi_ev = false;
3756
3757 switch (hkey) {
3758 case TP_HKEY_EV_UNDOCK_ACK:
3759 /* ACPI undock operation completed after wakeup */
3760 hotkey_autosleep_ack = 1;
3761 pr_info("undocked\n");
3762 hotkey_wakeup_hotunplug_complete_notify_change();
3763 return true;
3764
3765 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3766 pr_info("docked into hotplug port replicator\n");
3767 return true;
3768 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3769 pr_info("undocked from hotplug port replicator\n");
3770 return true;
3771
3772 default:
3773 return false;
3774 }
3775 }
3776
3777 static bool hotkey_notify_usrevent(const u32 hkey,
3778 bool *send_acpi_ev,
3779 bool *ignore_acpi_ev)
3780 {
3781 /* 0x5000-0x5FFF: human interface helpers */
3782 *send_acpi_ev = true;
3783 *ignore_acpi_ev = false;
3784
3785 switch (hkey) {
3786 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3787 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3788 return true;
3789
3790 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3791 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3792 tpacpi_input_send_tabletsw();
3793 hotkey_tablet_mode_notify_change();
3794 *send_acpi_ev = false;
3795 return true;
3796
3797 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3798 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3799 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3800 /* do not propagate these events */
3801 *ignore_acpi_ev = true;
3802 return true;
3803
3804 default:
3805 return false;
3806 }
3807 }
3808
3809 static void thermal_dump_all_sensors(void);
3810
3811 static bool hotkey_notify_6xxx(const u32 hkey,
3812 bool *send_acpi_ev,
3813 bool *ignore_acpi_ev)
3814 {
3815 bool known = true;
3816
3817 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3818 *send_acpi_ev = true;
3819 *ignore_acpi_ev = false;
3820
3821 switch (hkey) {
3822 case TP_HKEY_EV_THM_TABLE_CHANGED:
3823 pr_info("EC reports that Thermal Table has changed\n");
3824 /* recommended action: do nothing, we don't have
3825 * Lenovo ATM information */
3826 return true;
3827 case TP_HKEY_EV_ALARM_BAT_HOT:
3828 pr_crit("THERMAL ALARM: battery is too hot!\n");
3829 /* recommended action: warn user through gui */
3830 break;
3831 case TP_HKEY_EV_ALARM_BAT_XHOT:
3832 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3833 /* recommended action: immediate sleep/hibernate */
3834 break;
3835 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3836 pr_crit("THERMAL ALARM: "
3837 "a sensor reports something is too hot!\n");
3838 /* recommended action: warn user through gui, that */
3839 /* some internal component is too hot */
3840 break;
3841 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3842 pr_alert("THERMAL EMERGENCY: "
3843 "a sensor reports something is extremely hot!\n");
3844 /* recommended action: immediate sleep/hibernate */
3845 break;
3846 case TP_HKEY_EV_AC_CHANGED:
3847 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3848 * AC status changed; can be triggered by plugging or
3849 * unplugging AC adapter, docking or undocking. */
3850
3851 /* fallthrough */
3852
3853 case TP_HKEY_EV_KEY_NUMLOCK:
3854 case TP_HKEY_EV_KEY_FN:
3855 case TP_HKEY_EV_KEY_FN_ESC:
3856 /* key press events, we just ignore them as long as the EC
3857 * is still reporting them in the normal keyboard stream */
3858 *send_acpi_ev = false;
3859 *ignore_acpi_ev = true;
3860 return true;
3861
3862 default:
3863 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3864 known = false;
3865 }
3866
3867 thermal_dump_all_sensors();
3868
3869 return known;
3870 }
3871
3872 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3873 {
3874 u32 hkey;
3875 bool send_acpi_ev;
3876 bool ignore_acpi_ev;
3877 bool known_ev;
3878
3879 if (event != 0x80) {
3880 pr_err("unknown HKEY notification event %d\n", event);
3881 /* forward it to userspace, maybe it knows how to handle it */
3882 acpi_bus_generate_netlink_event(
3883 ibm->acpi->device->pnp.device_class,
3884 dev_name(&ibm->acpi->device->dev),
3885 event, 0);
3886 return;
3887 }
3888
3889 while (1) {
3890 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3891 pr_err("failed to retrieve HKEY event\n");
3892 return;
3893 }
3894
3895 if (hkey == 0) {
3896 /* queue empty */
3897 return;
3898 }
3899
3900 send_acpi_ev = true;
3901 ignore_acpi_ev = false;
3902
3903 switch (hkey >> 12) {
3904 case 1:
3905 /* 0x1000-0x1FFF: key presses */
3906 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3907 &ignore_acpi_ev);
3908 break;
3909 case 2:
3910 /* 0x2000-0x2FFF: Wakeup reason */
3911 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3912 &ignore_acpi_ev);
3913 break;
3914 case 3:
3915 /* 0x3000-0x3FFF: bay-related wakeups */
3916 switch (hkey) {
3917 case TP_HKEY_EV_BAYEJ_ACK:
3918 hotkey_autosleep_ack = 1;
3919 pr_info("bay ejected\n");
3920 hotkey_wakeup_hotunplug_complete_notify_change();
3921 known_ev = true;
3922 break;
3923 case TP_HKEY_EV_OPTDRV_EJ:
3924 /* FIXME: kick libata if SATA link offline */
3925 known_ev = true;
3926 break;
3927 default:
3928 known_ev = false;
3929 }
3930 break;
3931 case 4:
3932 /* 0x4000-0x4FFF: dock-related events */
3933 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3934 &ignore_acpi_ev);
3935 break;
3936 case 5:
3937 /* 0x5000-0x5FFF: human interface helpers */
3938 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3939 &ignore_acpi_ev);
3940 break;
3941 case 6:
3942 /* 0x6000-0x6FFF: thermal alarms/notices and
3943 * keyboard events */
3944 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3945 &ignore_acpi_ev);
3946 break;
3947 case 7:
3948 /* 0x7000-0x7FFF: misc */
3949 if (tp_features.hotkey_wlsw &&
3950 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3951 tpacpi_send_radiosw_update();
3952 send_acpi_ev = 0;
3953 known_ev = true;
3954 break;
3955 }
3956 /* fallthrough to default */
3957 default:
3958 known_ev = false;
3959 }
3960 if (!known_ev) {
3961 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3962 pr_notice("please report the conditions when this "
3963 "event happened to %s\n", TPACPI_MAIL);
3964 }
3965
3966 /* netlink events */
3967 if (!ignore_acpi_ev && send_acpi_ev) {
3968 acpi_bus_generate_netlink_event(
3969 ibm->acpi->device->pnp.device_class,
3970 dev_name(&ibm->acpi->device->dev),
3971 event, hkey);
3972 }
3973 }
3974 }
3975
3976 static void hotkey_suspend(void)
3977 {
3978 /* Do these on suspend, we get the events on early resume! */
3979 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3980 hotkey_autosleep_ack = 0;
3981
3982 /* save previous mode of adaptive keyboard of X1 Carbon */
3983 if (tp_features.has_adaptive_kbd) {
3984 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
3985 "GTRW", "dd", 0)) {
3986 pr_err("Cannot read adaptive keyboard mode.\n");
3987 }
3988 }
3989 }
3990
3991 static void hotkey_resume(void)
3992 {
3993 tpacpi_disable_brightness_delay();
3994
3995 if (hotkey_status_set(true) < 0 ||
3996 hotkey_mask_set(hotkey_acpi_mask) < 0)
3997 pr_err("error while attempting to reset the event "
3998 "firmware interface\n");
3999
4000 tpacpi_send_radiosw_update();
4001 hotkey_tablet_mode_notify_change();
4002 hotkey_wakeup_reason_notify_change();
4003 hotkey_wakeup_hotunplug_complete_notify_change();
4004 hotkey_poll_setup_safe(false);
4005
4006 /* restore previous mode of adapive keyboard of X1 Carbon */
4007 if (tp_features.has_adaptive_kbd) {
4008 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4009 adaptive_keyboard_prev_mode)) {
4010 pr_err("Cannot set adaptive keyboard mode.\n");
4011 }
4012 }
4013 }
4014
4015 /* procfs -------------------------------------------------------------- */
4016 static int hotkey_read(struct seq_file *m)
4017 {
4018 int res, status;
4019
4020 if (!tp_features.hotkey) {
4021 seq_printf(m, "status:\t\tnot supported\n");
4022 return 0;
4023 }
4024
4025 if (mutex_lock_killable(&hotkey_mutex))
4026 return -ERESTARTSYS;
4027 res = hotkey_status_get(&status);
4028 if (!res)
4029 res = hotkey_mask_get();
4030 mutex_unlock(&hotkey_mutex);
4031 if (res)
4032 return res;
4033
4034 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
4035 if (hotkey_all_mask) {
4036 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4037 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4038 } else {
4039 seq_printf(m, "mask:\t\tnot supported\n");
4040 seq_printf(m, "commands:\tenable, disable, reset\n");
4041 }
4042
4043 return 0;
4044 }
4045
4046 static void hotkey_enabledisable_warn(bool enable)
4047 {
4048 tpacpi_log_usertask("procfs hotkey enable/disable");
4049 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4050 pr_fmt("hotkey enable/disable functionality has been "
4051 "removed from the driver. "
4052 "Hotkeys are always enabled.\n")))
4053 pr_err("Please remove the hotkey=enable module "
4054 "parameter, it is deprecated. "
4055 "Hotkeys are always enabled.\n");
4056 }
4057
4058 static int hotkey_write(char *buf)
4059 {
4060 int res;
4061 u32 mask;
4062 char *cmd;
4063
4064 if (!tp_features.hotkey)
4065 return -ENODEV;
4066
4067 if (mutex_lock_killable(&hotkey_mutex))
4068 return -ERESTARTSYS;
4069
4070 mask = hotkey_user_mask;
4071
4072 res = 0;
4073 while ((cmd = next_cmd(&buf))) {
4074 if (strlencmp(cmd, "enable") == 0) {
4075 hotkey_enabledisable_warn(1);
4076 } else if (strlencmp(cmd, "disable") == 0) {
4077 hotkey_enabledisable_warn(0);
4078 res = -EPERM;
4079 } else if (strlencmp(cmd, "reset") == 0) {
4080 mask = (hotkey_all_mask | hotkey_source_mask)
4081 & ~hotkey_reserved_mask;
4082 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
4083 /* mask set */
4084 } else if (sscanf(cmd, "%x", &mask) == 1) {
4085 /* mask set */
4086 } else {
4087 res = -EINVAL;
4088 goto errexit;
4089 }
4090 }
4091
4092 if (!res) {
4093 tpacpi_disclose_usertask("procfs hotkey",
4094 "set mask to 0x%08x\n", mask);
4095 res = hotkey_user_mask_set(mask);
4096 }
4097
4098 errexit:
4099 mutex_unlock(&hotkey_mutex);
4100 return res;
4101 }
4102
4103 static const struct acpi_device_id ibm_htk_device_ids[] = {
4104 {TPACPI_ACPI_IBM_HKEY_HID, 0},
4105 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4106 {"", 0},
4107 };
4108
4109 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4110 .hid = ibm_htk_device_ids,
4111 .notify = hotkey_notify,
4112 .handle = &hkey_handle,
4113 .type = ACPI_DEVICE_NOTIFY,
4114 };
4115
4116 static struct ibm_struct hotkey_driver_data = {
4117 .name = "hotkey",
4118 .read = hotkey_read,
4119 .write = hotkey_write,
4120 .exit = hotkey_exit,
4121 .resume = hotkey_resume,
4122 .suspend = hotkey_suspend,
4123 .acpi = &ibm_hotkey_acpidriver,
4124 };
4125
4126 /*************************************************************************
4127 * Bluetooth subdriver
4128 */
4129
4130 enum {
4131 /* ACPI GBDC/SBDC bits */
4132 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
4133 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
4134 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
4135 0 = disable, 1 = enable */
4136 };
4137
4138 enum {
4139 /* ACPI \BLTH commands */
4140 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
4141 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
4142 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
4143 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
4144 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
4145 };
4146
4147 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
4148
4149 static int bluetooth_get_status(void)
4150 {
4151 int status;
4152
4153 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4154 if (dbg_bluetoothemul)
4155 return (tpacpi_bluetooth_emulstate) ?
4156 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4157 #endif
4158
4159 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4160 return -EIO;
4161
4162 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4163 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4164 }
4165
4166 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4167 {
4168 int status;
4169
4170 vdbg_printk(TPACPI_DBG_RFKILL,
4171 "will attempt to %s bluetooth\n",
4172 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4173
4174 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4175 if (dbg_bluetoothemul) {
4176 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4177 return 0;
4178 }
4179 #endif
4180
4181 if (state == TPACPI_RFK_RADIO_ON)
4182 status = TP_ACPI_BLUETOOTH_RADIOSSW
4183 | TP_ACPI_BLUETOOTH_RESUMECTRL;
4184 else
4185 status = 0;
4186
4187 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4188 return -EIO;
4189
4190 return 0;
4191 }
4192
4193 /* sysfs bluetooth enable ---------------------------------------------- */
4194 static ssize_t bluetooth_enable_show(struct device *dev,
4195 struct device_attribute *attr,
4196 char *buf)
4197 {
4198 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4199 attr, buf);
4200 }
4201
4202 static ssize_t bluetooth_enable_store(struct device *dev,
4203 struct device_attribute *attr,
4204 const char *buf, size_t count)
4205 {
4206 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4207 attr, buf, count);
4208 }
4209
4210 static DEVICE_ATTR_RW(bluetooth_enable);
4211
4212 /* --------------------------------------------------------------------- */
4213
4214 static struct attribute *bluetooth_attributes[] = {
4215 &dev_attr_bluetooth_enable.attr,
4216 NULL
4217 };
4218
4219 static const struct attribute_group bluetooth_attr_group = {
4220 .attrs = bluetooth_attributes,
4221 };
4222
4223 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4224 .get_status = bluetooth_get_status,
4225 .set_status = bluetooth_set_status,
4226 };
4227
4228 static void bluetooth_shutdown(void)
4229 {
4230 /* Order firmware to save current state to NVRAM */
4231 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4232 TP_ACPI_BLTH_SAVE_STATE))
4233 pr_notice("failed to save bluetooth state to NVRAM\n");
4234 else
4235 vdbg_printk(TPACPI_DBG_RFKILL,
4236 "bluetooth state saved to NVRAM\n");
4237 }
4238
4239 static void bluetooth_exit(void)
4240 {
4241 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4242 &bluetooth_attr_group);
4243
4244 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4245
4246 bluetooth_shutdown();
4247 }
4248
4249 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4250 {
4251 int res;
4252 int status = 0;
4253
4254 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4255 "initializing bluetooth subdriver\n");
4256
4257 TPACPI_ACPIHANDLE_INIT(hkey);
4258
4259 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4260 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4261 tp_features.bluetooth = hkey_handle &&
4262 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4263
4264 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4265 "bluetooth is %s, status 0x%02x\n",
4266 str_supported(tp_features.bluetooth),
4267 status);
4268
4269 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4270 if (dbg_bluetoothemul) {
4271 tp_features.bluetooth = 1;
4272 pr_info("bluetooth switch emulation enabled\n");
4273 } else
4274 #endif
4275 if (tp_features.bluetooth &&
4276 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4277 /* no bluetooth hardware present in system */
4278 tp_features.bluetooth = 0;
4279 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4280 "bluetooth hardware not installed\n");
4281 }
4282
4283 if (!tp_features.bluetooth)
4284 return 1;
4285
4286 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4287 &bluetooth_tprfk_ops,
4288 RFKILL_TYPE_BLUETOOTH,
4289 TPACPI_RFK_BLUETOOTH_SW_NAME,
4290 true);
4291 if (res)
4292 return res;
4293
4294 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4295 &bluetooth_attr_group);
4296 if (res) {
4297 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4298 return res;
4299 }
4300
4301 return 0;
4302 }
4303
4304 /* procfs -------------------------------------------------------------- */
4305 static int bluetooth_read(struct seq_file *m)
4306 {
4307 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4308 }
4309
4310 static int bluetooth_write(char *buf)
4311 {
4312 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4313 }
4314
4315 static struct ibm_struct bluetooth_driver_data = {
4316 .name = "bluetooth",
4317 .read = bluetooth_read,
4318 .write = bluetooth_write,
4319 .exit = bluetooth_exit,
4320 .shutdown = bluetooth_shutdown,
4321 };
4322
4323 /*************************************************************************
4324 * Wan subdriver
4325 */
4326
4327 enum {
4328 /* ACPI GWAN/SWAN bits */
4329 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4330 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4331 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4332 0 = disable, 1 = enable */
4333 };
4334
4335 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4336
4337 static int wan_get_status(void)
4338 {
4339 int status;
4340
4341 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4342 if (dbg_wwanemul)
4343 return (tpacpi_wwan_emulstate) ?
4344 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4345 #endif
4346
4347 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4348 return -EIO;
4349
4350 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4351 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4352 }
4353
4354 static int wan_set_status(enum tpacpi_rfkill_state state)
4355 {
4356 int status;
4357
4358 vdbg_printk(TPACPI_DBG_RFKILL,
4359 "will attempt to %s wwan\n",
4360 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4361
4362 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4363 if (dbg_wwanemul) {
4364 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4365 return 0;
4366 }
4367 #endif
4368
4369 if (state == TPACPI_RFK_RADIO_ON)
4370 status = TP_ACPI_WANCARD_RADIOSSW
4371 | TP_ACPI_WANCARD_RESUMECTRL;
4372 else
4373 status = 0;
4374
4375 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4376 return -EIO;
4377
4378 return 0;
4379 }
4380
4381 /* sysfs wan enable ---------------------------------------------------- */
4382 static ssize_t wan_enable_show(struct device *dev,
4383 struct device_attribute *attr,
4384 char *buf)
4385 {
4386 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4387 attr, buf);
4388 }
4389
4390 static ssize_t wan_enable_store(struct device *dev,
4391 struct device_attribute *attr,
4392 const char *buf, size_t count)
4393 {
4394 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4395 attr, buf, count);
4396 }
4397
4398 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4399 wan_enable_show, wan_enable_store);
4400
4401 /* --------------------------------------------------------------------- */
4402
4403 static struct attribute *wan_attributes[] = {
4404 &dev_attr_wwan_enable.attr,
4405 NULL
4406 };
4407
4408 static const struct attribute_group wan_attr_group = {
4409 .attrs = wan_attributes,
4410 };
4411
4412 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4413 .get_status = wan_get_status,
4414 .set_status = wan_set_status,
4415 };
4416
4417 static void wan_shutdown(void)
4418 {
4419 /* Order firmware to save current state to NVRAM */
4420 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4421 TP_ACPI_WGSV_SAVE_STATE))
4422 pr_notice("failed to save WWAN state to NVRAM\n");
4423 else
4424 vdbg_printk(TPACPI_DBG_RFKILL,
4425 "WWAN state saved to NVRAM\n");
4426 }
4427
4428 static void wan_exit(void)
4429 {
4430 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4431 &wan_attr_group);
4432
4433 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4434
4435 wan_shutdown();
4436 }
4437
4438 static int __init wan_init(struct ibm_init_struct *iibm)
4439 {
4440 int res;
4441 int status = 0;
4442
4443 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4444 "initializing wan subdriver\n");
4445
4446 TPACPI_ACPIHANDLE_INIT(hkey);
4447
4448 tp_features.wan = hkey_handle &&
4449 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4450
4451 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4452 "wan is %s, status 0x%02x\n",
4453 str_supported(tp_features.wan),
4454 status);
4455
4456 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4457 if (dbg_wwanemul) {
4458 tp_features.wan = 1;
4459 pr_info("wwan switch emulation enabled\n");
4460 } else
4461 #endif
4462 if (tp_features.wan &&
4463 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4464 /* no wan hardware present in system */
4465 tp_features.wan = 0;
4466 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4467 "wan hardware not installed\n");
4468 }
4469
4470 if (!tp_features.wan)
4471 return 1;
4472
4473 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4474 &wan_tprfk_ops,
4475 RFKILL_TYPE_WWAN,
4476 TPACPI_RFK_WWAN_SW_NAME,
4477 true);
4478 if (res)
4479 return res;
4480
4481 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4482 &wan_attr_group);
4483
4484 if (res) {
4485 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4486 return res;
4487 }
4488
4489 return 0;
4490 }
4491
4492 /* procfs -------------------------------------------------------------- */
4493 static int wan_read(struct seq_file *m)
4494 {
4495 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4496 }
4497
4498 static int wan_write(char *buf)
4499 {
4500 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4501 }
4502
4503 static struct ibm_struct wan_driver_data = {
4504 .name = "wan",
4505 .read = wan_read,
4506 .write = wan_write,
4507 .exit = wan_exit,
4508 .shutdown = wan_shutdown,
4509 };
4510
4511 /*************************************************************************
4512 * UWB subdriver
4513 */
4514
4515 enum {
4516 /* ACPI GUWB/SUWB bits */
4517 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4518 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4519 };
4520
4521 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4522
4523 static int uwb_get_status(void)
4524 {
4525 int status;
4526
4527 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4528 if (dbg_uwbemul)
4529 return (tpacpi_uwb_emulstate) ?
4530 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4531 #endif
4532
4533 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4534 return -EIO;
4535
4536 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4537 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4538 }
4539
4540 static int uwb_set_status(enum tpacpi_rfkill_state state)
4541 {
4542 int status;
4543
4544 vdbg_printk(TPACPI_DBG_RFKILL,
4545 "will attempt to %s UWB\n",
4546 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4547
4548 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4549 if (dbg_uwbemul) {
4550 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4551 return 0;
4552 }
4553 #endif
4554
4555 if (state == TPACPI_RFK_RADIO_ON)
4556 status = TP_ACPI_UWB_RADIOSSW;
4557 else
4558 status = 0;
4559
4560 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4561 return -EIO;
4562
4563 return 0;
4564 }
4565
4566 /* --------------------------------------------------------------------- */
4567
4568 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4569 .get_status = uwb_get_status,
4570 .set_status = uwb_set_status,
4571 };
4572
4573 static void uwb_exit(void)
4574 {
4575 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4576 }
4577
4578 static int __init uwb_init(struct ibm_init_struct *iibm)
4579 {
4580 int res;
4581 int status = 0;
4582
4583 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4584 "initializing uwb subdriver\n");
4585
4586 TPACPI_ACPIHANDLE_INIT(hkey);
4587
4588 tp_features.uwb = hkey_handle &&
4589 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4590
4591 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4592 "uwb is %s, status 0x%02x\n",
4593 str_supported(tp_features.uwb),
4594 status);
4595
4596 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4597 if (dbg_uwbemul) {
4598 tp_features.uwb = 1;
4599 pr_info("uwb switch emulation enabled\n");
4600 } else
4601 #endif
4602 if (tp_features.uwb &&
4603 !(status & TP_ACPI_UWB_HWPRESENT)) {
4604 /* no uwb hardware present in system */
4605 tp_features.uwb = 0;
4606 dbg_printk(TPACPI_DBG_INIT,
4607 "uwb hardware not installed\n");
4608 }
4609
4610 if (!tp_features.uwb)
4611 return 1;
4612
4613 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4614 &uwb_tprfk_ops,
4615 RFKILL_TYPE_UWB,
4616 TPACPI_RFK_UWB_SW_NAME,
4617 false);
4618 return res;
4619 }
4620
4621 static struct ibm_struct uwb_driver_data = {
4622 .name = "uwb",
4623 .exit = uwb_exit,
4624 .flags.experimental = 1,
4625 };
4626
4627 /*************************************************************************
4628 * Video subdriver
4629 */
4630
4631 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4632
4633 enum video_access_mode {
4634 TPACPI_VIDEO_NONE = 0,
4635 TPACPI_VIDEO_570, /* 570 */
4636 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4637 TPACPI_VIDEO_NEW, /* all others */
4638 };
4639
4640 enum { /* video status flags, based on VIDEO_570 */
4641 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4642 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4643 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4644 };
4645
4646 enum { /* TPACPI_VIDEO_570 constants */
4647 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4648 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4649 * video_status_flags */
4650 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4651 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4652 };
4653
4654 static enum video_access_mode video_supported;
4655 static int video_orig_autosw;
4656
4657 static int video_autosw_get(void);
4658 static int video_autosw_set(int enable);
4659
4660 TPACPI_HANDLE(vid, root,
4661 "\\_SB.PCI.AGP.VGA", /* 570 */
4662 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4663 "\\_SB.PCI0.VID0", /* 770e */
4664 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4665 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4666 "\\_SB.PCI0.AGP.VID", /* all others */
4667 ); /* R30, R31 */
4668
4669 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4670
4671 static int __init video_init(struct ibm_init_struct *iibm)
4672 {
4673 int ivga;
4674
4675 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4676
4677 TPACPI_ACPIHANDLE_INIT(vid);
4678 if (tpacpi_is_ibm())
4679 TPACPI_ACPIHANDLE_INIT(vid2);
4680
4681 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4682 /* G41, assume IVGA doesn't change */
4683 vid_handle = vid2_handle;
4684
4685 if (!vid_handle)
4686 /* video switching not supported on R30, R31 */
4687 video_supported = TPACPI_VIDEO_NONE;
4688 else if (tpacpi_is_ibm() &&
4689 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4690 /* 570 */
4691 video_supported = TPACPI_VIDEO_570;
4692 else if (tpacpi_is_ibm() &&
4693 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4694 /* 600e/x, 770e, 770x */
4695 video_supported = TPACPI_VIDEO_770;
4696 else
4697 /* all others */
4698 video_supported = TPACPI_VIDEO_NEW;
4699
4700 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4701 str_supported(video_supported != TPACPI_VIDEO_NONE),
4702 video_supported);
4703
4704 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
4705 }
4706
4707 static void video_exit(void)
4708 {
4709 dbg_printk(TPACPI_DBG_EXIT,
4710 "restoring original video autoswitch mode\n");
4711 if (video_autosw_set(video_orig_autosw))
4712 pr_err("error while trying to restore original "
4713 "video autoswitch mode\n");
4714 }
4715
4716 static int video_outputsw_get(void)
4717 {
4718 int status = 0;
4719 int i;
4720
4721 switch (video_supported) {
4722 case TPACPI_VIDEO_570:
4723 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4724 TP_ACPI_VIDEO_570_PHSCMD))
4725 return -EIO;
4726 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4727 break;
4728 case TPACPI_VIDEO_770:
4729 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4730 return -EIO;
4731 if (i)
4732 status |= TP_ACPI_VIDEO_S_LCD;
4733 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4734 return -EIO;
4735 if (i)
4736 status |= TP_ACPI_VIDEO_S_CRT;
4737 break;
4738 case TPACPI_VIDEO_NEW:
4739 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4740 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4741 return -EIO;
4742 if (i)
4743 status |= TP_ACPI_VIDEO_S_CRT;
4744
4745 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4746 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4747 return -EIO;
4748 if (i)
4749 status |= TP_ACPI_VIDEO_S_LCD;
4750 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4751 return -EIO;
4752 if (i)
4753 status |= TP_ACPI_VIDEO_S_DVI;
4754 break;
4755 default:
4756 return -ENOSYS;
4757 }
4758
4759 return status;
4760 }
4761
4762 static int video_outputsw_set(int status)
4763 {
4764 int autosw;
4765 int res = 0;
4766
4767 switch (video_supported) {
4768 case TPACPI_VIDEO_570:
4769 res = acpi_evalf(NULL, NULL,
4770 "\\_SB.PHS2", "vdd",
4771 TP_ACPI_VIDEO_570_PHS2CMD,
4772 status | TP_ACPI_VIDEO_570_PHS2SET);
4773 break;
4774 case TPACPI_VIDEO_770:
4775 autosw = video_autosw_get();
4776 if (autosw < 0)
4777 return autosw;
4778
4779 res = video_autosw_set(1);
4780 if (res)
4781 return res;
4782 res = acpi_evalf(vid_handle, NULL,
4783 "ASWT", "vdd", status * 0x100, 0);
4784 if (!autosw && video_autosw_set(autosw)) {
4785 pr_err("video auto-switch left enabled due to error\n");
4786 return -EIO;
4787 }
4788 break;
4789 case TPACPI_VIDEO_NEW:
4790 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4791 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4792 break;
4793 default:
4794 return -ENOSYS;
4795 }
4796
4797 return (res) ? 0 : -EIO;
4798 }
4799
4800 static int video_autosw_get(void)
4801 {
4802 int autosw = 0;
4803
4804 switch (video_supported) {
4805 case TPACPI_VIDEO_570:
4806 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4807 return -EIO;
4808 break;
4809 case TPACPI_VIDEO_770:
4810 case TPACPI_VIDEO_NEW:
4811 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4812 return -EIO;
4813 break;
4814 default:
4815 return -ENOSYS;
4816 }
4817
4818 return autosw & 1;
4819 }
4820
4821 static int video_autosw_set(int enable)
4822 {
4823 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
4824 return -EIO;
4825 return 0;
4826 }
4827
4828 static int video_outputsw_cycle(void)
4829 {
4830 int autosw = video_autosw_get();
4831 int res;
4832
4833 if (autosw < 0)
4834 return autosw;
4835
4836 switch (video_supported) {
4837 case TPACPI_VIDEO_570:
4838 res = video_autosw_set(1);
4839 if (res)
4840 return res;
4841 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4842 break;
4843 case TPACPI_VIDEO_770:
4844 case TPACPI_VIDEO_NEW:
4845 res = video_autosw_set(1);
4846 if (res)
4847 return res;
4848 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4849 break;
4850 default:
4851 return -ENOSYS;
4852 }
4853 if (!autosw && video_autosw_set(autosw)) {
4854 pr_err("video auto-switch left enabled due to error\n");
4855 return -EIO;
4856 }
4857
4858 return (res) ? 0 : -EIO;
4859 }
4860
4861 static int video_expand_toggle(void)
4862 {
4863 switch (video_supported) {
4864 case TPACPI_VIDEO_570:
4865 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
4866 0 : -EIO;
4867 case TPACPI_VIDEO_770:
4868 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
4869 0 : -EIO;
4870 case TPACPI_VIDEO_NEW:
4871 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
4872 0 : -EIO;
4873 default:
4874 return -ENOSYS;
4875 }
4876 /* not reached */
4877 }
4878
4879 static int video_read(struct seq_file *m)
4880 {
4881 int status, autosw;
4882
4883 if (video_supported == TPACPI_VIDEO_NONE) {
4884 seq_printf(m, "status:\t\tnot supported\n");
4885 return 0;
4886 }
4887
4888 /* Even reads can crash X.org, so... */
4889 if (!capable(CAP_SYS_ADMIN))
4890 return -EPERM;
4891
4892 status = video_outputsw_get();
4893 if (status < 0)
4894 return status;
4895
4896 autosw = video_autosw_get();
4897 if (autosw < 0)
4898 return autosw;
4899
4900 seq_printf(m, "status:\t\tsupported\n");
4901 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4902 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4903 if (video_supported == TPACPI_VIDEO_NEW)
4904 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4905 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4906 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4907 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4908 if (video_supported == TPACPI_VIDEO_NEW)
4909 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4910 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4911 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4912
4913 return 0;
4914 }
4915
4916 static int video_write(char *buf)
4917 {
4918 char *cmd;
4919 int enable, disable, status;
4920 int res;
4921
4922 if (video_supported == TPACPI_VIDEO_NONE)
4923 return -ENODEV;
4924
4925 /* Even reads can crash X.org, let alone writes... */
4926 if (!capable(CAP_SYS_ADMIN))
4927 return -EPERM;
4928
4929 enable = 0;
4930 disable = 0;
4931
4932 while ((cmd = next_cmd(&buf))) {
4933 if (strlencmp(cmd, "lcd_enable") == 0) {
4934 enable |= TP_ACPI_VIDEO_S_LCD;
4935 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4936 disable |= TP_ACPI_VIDEO_S_LCD;
4937 } else if (strlencmp(cmd, "crt_enable") == 0) {
4938 enable |= TP_ACPI_VIDEO_S_CRT;
4939 } else if (strlencmp(cmd, "crt_disable") == 0) {
4940 disable |= TP_ACPI_VIDEO_S_CRT;
4941 } else if (video_supported == TPACPI_VIDEO_NEW &&
4942 strlencmp(cmd, "dvi_enable") == 0) {
4943 enable |= TP_ACPI_VIDEO_S_DVI;
4944 } else if (video_supported == TPACPI_VIDEO_NEW &&
4945 strlencmp(cmd, "dvi_disable") == 0) {
4946 disable |= TP_ACPI_VIDEO_S_DVI;
4947 } else if (strlencmp(cmd, "auto_enable") == 0) {
4948 res = video_autosw_set(1);
4949 if (res)
4950 return res;
4951 } else if (strlencmp(cmd, "auto_disable") == 0) {
4952 res = video_autosw_set(0);
4953 if (res)
4954 return res;
4955 } else if (strlencmp(cmd, "video_switch") == 0) {
4956 res = video_outputsw_cycle();
4957 if (res)
4958 return res;
4959 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4960 res = video_expand_toggle();
4961 if (res)
4962 return res;
4963 } else
4964 return -EINVAL;
4965 }
4966
4967 if (enable || disable) {
4968 status = video_outputsw_get();
4969 if (status < 0)
4970 return status;
4971 res = video_outputsw_set((status & ~disable) | enable);
4972 if (res)
4973 return res;
4974 }
4975
4976 return 0;
4977 }
4978
4979 static struct ibm_struct video_driver_data = {
4980 .name = "video",
4981 .read = video_read,
4982 .write = video_write,
4983 .exit = video_exit,
4984 };
4985
4986 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4987
4988 /*************************************************************************
4989 * Light (thinklight) subdriver
4990 */
4991
4992 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4993 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4994
4995 static int light_get_status(void)
4996 {
4997 int status = 0;
4998
4999 if (tp_features.light_status) {
5000 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5001 return -EIO;
5002 return (!!status);
5003 }
5004
5005 return -ENXIO;
5006 }
5007
5008 static int light_set_status(int status)
5009 {
5010 int rc;
5011
5012 if (tp_features.light) {
5013 if (cmos_handle) {
5014 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5015 (status) ?
5016 TP_CMOS_THINKLIGHT_ON :
5017 TP_CMOS_THINKLIGHT_OFF);
5018 } else {
5019 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5020 (status) ? 1 : 0);
5021 }
5022 return (rc) ? 0 : -EIO;
5023 }
5024
5025 return -ENXIO;
5026 }
5027
5028 static void light_set_status_worker(struct work_struct *work)
5029 {
5030 struct tpacpi_led_classdev *data =
5031 container_of(work, struct tpacpi_led_classdev, work);
5032
5033 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5034 light_set_status((data->new_state != TPACPI_LED_OFF));
5035 }
5036
5037 static void light_sysfs_set(struct led_classdev *led_cdev,
5038 enum led_brightness brightness)
5039 {
5040 struct tpacpi_led_classdev *data =
5041 container_of(led_cdev,
5042 struct tpacpi_led_classdev,
5043 led_classdev);
5044 data->new_state = (brightness != LED_OFF) ?
5045 TPACPI_LED_ON : TPACPI_LED_OFF;
5046 queue_work(tpacpi_wq, &data->work);
5047 }
5048
5049 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5050 {
5051 return (light_get_status() == 1) ? LED_FULL : LED_OFF;
5052 }
5053
5054 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5055 .led_classdev = {
5056 .name = "tpacpi::thinklight",
5057 .brightness_set = &light_sysfs_set,
5058 .brightness_get = &light_sysfs_get,
5059 }
5060 };
5061
5062 static int __init light_init(struct ibm_init_struct *iibm)
5063 {
5064 int rc;
5065
5066 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5067
5068 if (tpacpi_is_ibm()) {
5069 TPACPI_ACPIHANDLE_INIT(ledb);
5070 TPACPI_ACPIHANDLE_INIT(lght);
5071 }
5072 TPACPI_ACPIHANDLE_INIT(cmos);
5073 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
5074
5075 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5076 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5077
5078 if (tp_features.light)
5079 /* light status not supported on
5080 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5081 tp_features.light_status =
5082 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5083
5084 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5085 str_supported(tp_features.light),
5086 str_supported(tp_features.light_status));
5087
5088 if (!tp_features.light)
5089 return 1;
5090
5091 rc = led_classdev_register(&tpacpi_pdev->dev,
5092 &tpacpi_led_thinklight.led_classdev);
5093
5094 if (rc < 0) {
5095 tp_features.light = 0;
5096 tp_features.light_status = 0;
5097 } else {
5098 rc = 0;
5099 }
5100
5101 return rc;
5102 }
5103
5104 static void light_exit(void)
5105 {
5106 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5107 flush_workqueue(tpacpi_wq);
5108 }
5109
5110 static int light_read(struct seq_file *m)
5111 {
5112 int status;
5113
5114 if (!tp_features.light) {
5115 seq_printf(m, "status:\t\tnot supported\n");
5116 } else if (!tp_features.light_status) {
5117 seq_printf(m, "status:\t\tunknown\n");
5118 seq_printf(m, "commands:\ton, off\n");
5119 } else {
5120 status = light_get_status();
5121 if (status < 0)
5122 return status;
5123 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
5124 seq_printf(m, "commands:\ton, off\n");
5125 }
5126
5127 return 0;
5128 }
5129
5130 static int light_write(char *buf)
5131 {
5132 char *cmd;
5133 int newstatus = 0;
5134
5135 if (!tp_features.light)
5136 return -ENODEV;
5137
5138 while ((cmd = next_cmd(&buf))) {
5139 if (strlencmp(cmd, "on") == 0) {
5140 newstatus = 1;
5141 } else if (strlencmp(cmd, "off") == 0) {
5142 newstatus = 0;
5143 } else
5144 return -EINVAL;
5145 }
5146
5147 return light_set_status(newstatus);
5148 }
5149
5150 static struct ibm_struct light_driver_data = {
5151 .name = "light",
5152 .read = light_read,
5153 .write = light_write,
5154 .exit = light_exit,
5155 };
5156
5157 /*************************************************************************
5158 * CMOS subdriver
5159 */
5160
5161 /* sysfs cmos_command -------------------------------------------------- */
5162 static ssize_t cmos_command_store(struct device *dev,
5163 struct device_attribute *attr,
5164 const char *buf, size_t count)
5165 {
5166 unsigned long cmos_cmd;
5167 int res;
5168
5169 if (parse_strtoul(buf, 21, &cmos_cmd))
5170 return -EINVAL;
5171
5172 res = issue_thinkpad_cmos_command(cmos_cmd);
5173 return (res) ? res : count;
5174 }
5175
5176 static DEVICE_ATTR_WO(cmos_command);
5177
5178 /* --------------------------------------------------------------------- */
5179
5180 static int __init cmos_init(struct ibm_init_struct *iibm)
5181 {
5182 int res;
5183
5184 vdbg_printk(TPACPI_DBG_INIT,
5185 "initializing cmos commands subdriver\n");
5186
5187 TPACPI_ACPIHANDLE_INIT(cmos);
5188
5189 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5190 str_supported(cmos_handle != NULL));
5191
5192 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5193 if (res)
5194 return res;
5195
5196 return (cmos_handle) ? 0 : 1;
5197 }
5198
5199 static void cmos_exit(void)
5200 {
5201 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5202 }
5203
5204 static int cmos_read(struct seq_file *m)
5205 {
5206 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5207 R30, R31, T20-22, X20-21 */
5208 if (!cmos_handle)
5209 seq_printf(m, "status:\t\tnot supported\n");
5210 else {
5211 seq_printf(m, "status:\t\tsupported\n");
5212 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5213 }
5214
5215 return 0;
5216 }
5217
5218 static int cmos_write(char *buf)
5219 {
5220 char *cmd;
5221 int cmos_cmd, res;
5222
5223 while ((cmd = next_cmd(&buf))) {
5224 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5225 cmos_cmd >= 0 && cmos_cmd <= 21) {
5226 /* cmos_cmd set */
5227 } else
5228 return -EINVAL;
5229
5230 res = issue_thinkpad_cmos_command(cmos_cmd);
5231 if (res)
5232 return res;
5233 }
5234
5235 return 0;
5236 }
5237
5238 static struct ibm_struct cmos_driver_data = {
5239 .name = "cmos",
5240 .read = cmos_read,
5241 .write = cmos_write,
5242 .exit = cmos_exit,
5243 };
5244
5245 /*************************************************************************
5246 * LED subdriver
5247 */
5248
5249 enum led_access_mode {
5250 TPACPI_LED_NONE = 0,
5251 TPACPI_LED_570, /* 570 */
5252 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5253 TPACPI_LED_NEW, /* all others */
5254 };
5255
5256 enum { /* For TPACPI_LED_OLD */
5257 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5258 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5259 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5260 };
5261
5262 static enum led_access_mode led_supported;
5263
5264 static acpi_handle led_handle;
5265
5266 #define TPACPI_LED_NUMLEDS 16
5267 static struct tpacpi_led_classdev *tpacpi_leds;
5268 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5269 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5270 /* there's a limit of 19 chars + NULL before 2.6.26 */
5271 "tpacpi::power",
5272 "tpacpi:orange:batt",
5273 "tpacpi:green:batt",
5274 "tpacpi::dock_active",
5275 "tpacpi::bay_active",
5276 "tpacpi::dock_batt",
5277 "tpacpi::unknown_led",
5278 "tpacpi::standby",
5279 "tpacpi::dock_status1",
5280 "tpacpi::dock_status2",
5281 "tpacpi::unknown_led2",
5282 "tpacpi::unknown_led3",
5283 "tpacpi::thinkvantage",
5284 };
5285 #define TPACPI_SAFE_LEDS 0x1081U
5286
5287 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5288 {
5289 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5290 return false;
5291 #else
5292 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5293 #endif
5294 }
5295
5296 static int led_get_status(const unsigned int led)
5297 {
5298 int status;
5299 enum led_status_t led_s;
5300
5301 switch (led_supported) {
5302 case TPACPI_LED_570:
5303 if (!acpi_evalf(ec_handle,
5304 &status, "GLED", "dd", 1 << led))
5305 return -EIO;
5306 led_s = (status == 0) ?
5307 TPACPI_LED_OFF :
5308 ((status == 1) ?
5309 TPACPI_LED_ON :
5310 TPACPI_LED_BLINK);
5311 tpacpi_led_state_cache[led] = led_s;
5312 return led_s;
5313 default:
5314 return -ENXIO;
5315 }
5316
5317 /* not reached */
5318 }
5319
5320 static int led_set_status(const unsigned int led,
5321 const enum led_status_t ledstatus)
5322 {
5323 /* off, on, blink. Index is led_status_t */
5324 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5325 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5326
5327 int rc = 0;
5328
5329 switch (led_supported) {
5330 case TPACPI_LED_570:
5331 /* 570 */
5332 if (unlikely(led > 7))
5333 return -EINVAL;
5334 if (unlikely(tpacpi_is_led_restricted(led)))
5335 return -EPERM;
5336 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5337 (1 << led), led_sled_arg1[ledstatus]))
5338 rc = -EIO;
5339 break;
5340 case TPACPI_LED_OLD:
5341 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5342 if (unlikely(led > 7))
5343 return -EINVAL;
5344 if (unlikely(tpacpi_is_led_restricted(led)))
5345 return -EPERM;
5346 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5347 if (rc >= 0)
5348 rc = ec_write(TPACPI_LED_EC_HLBL,
5349 (ledstatus == TPACPI_LED_BLINK) << led);
5350 if (rc >= 0)
5351 rc = ec_write(TPACPI_LED_EC_HLCL,
5352 (ledstatus != TPACPI_LED_OFF) << led);
5353 break;
5354 case TPACPI_LED_NEW:
5355 /* all others */
5356 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5357 return -EINVAL;
5358 if (unlikely(tpacpi_is_led_restricted(led)))
5359 return -EPERM;
5360 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5361 led, led_led_arg1[ledstatus]))
5362 rc = -EIO;
5363 break;
5364 default:
5365 rc = -ENXIO;
5366 }
5367
5368 if (!rc)
5369 tpacpi_led_state_cache[led] = ledstatus;
5370
5371 return rc;
5372 }
5373
5374 static void led_set_status_worker(struct work_struct *work)
5375 {
5376 struct tpacpi_led_classdev *data =
5377 container_of(work, struct tpacpi_led_classdev, work);
5378
5379 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5380 led_set_status(data->led, data->new_state);
5381 }
5382
5383 static void led_sysfs_set(struct led_classdev *led_cdev,
5384 enum led_brightness brightness)
5385 {
5386 struct tpacpi_led_classdev *data = container_of(led_cdev,
5387 struct tpacpi_led_classdev, led_classdev);
5388
5389 if (brightness == LED_OFF)
5390 data->new_state = TPACPI_LED_OFF;
5391 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5392 data->new_state = TPACPI_LED_ON;
5393 else
5394 data->new_state = TPACPI_LED_BLINK;
5395
5396 queue_work(tpacpi_wq, &data->work);
5397 }
5398
5399 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5400 unsigned long *delay_on, unsigned long *delay_off)
5401 {
5402 struct tpacpi_led_classdev *data = container_of(led_cdev,
5403 struct tpacpi_led_classdev, led_classdev);
5404
5405 /* Can we choose the flash rate? */
5406 if (*delay_on == 0 && *delay_off == 0) {
5407 /* yes. set them to the hardware blink rate (1 Hz) */
5408 *delay_on = 500; /* ms */
5409 *delay_off = 500; /* ms */
5410 } else if ((*delay_on != 500) || (*delay_off != 500))
5411 return -EINVAL;
5412
5413 data->new_state = TPACPI_LED_BLINK;
5414 queue_work(tpacpi_wq, &data->work);
5415
5416 return 0;
5417 }
5418
5419 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5420 {
5421 int rc;
5422
5423 struct tpacpi_led_classdev *data = container_of(led_cdev,
5424 struct tpacpi_led_classdev, led_classdev);
5425
5426 rc = led_get_status(data->led);
5427
5428 if (rc == TPACPI_LED_OFF || rc < 0)
5429 rc = LED_OFF; /* no error handling in led class :( */
5430 else
5431 rc = LED_FULL;
5432
5433 return rc;
5434 }
5435
5436 static void led_exit(void)
5437 {
5438 unsigned int i;
5439
5440 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5441 if (tpacpi_leds[i].led_classdev.name)
5442 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5443 }
5444
5445 flush_workqueue(tpacpi_wq);
5446 kfree(tpacpi_leds);
5447 }
5448
5449 static int __init tpacpi_init_led(unsigned int led)
5450 {
5451 int rc;
5452
5453 tpacpi_leds[led].led = led;
5454
5455 /* LEDs with no name don't get registered */
5456 if (!tpacpi_led_names[led])
5457 return 0;
5458
5459 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5460 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5461 if (led_supported == TPACPI_LED_570)
5462 tpacpi_leds[led].led_classdev.brightness_get =
5463 &led_sysfs_get;
5464
5465 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5466
5467 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5468
5469 rc = led_classdev_register(&tpacpi_pdev->dev,
5470 &tpacpi_leds[led].led_classdev);
5471 if (rc < 0)
5472 tpacpi_leds[led].led_classdev.name = NULL;
5473
5474 return rc;
5475 }
5476
5477 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5478 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5479 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5480 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5481
5482 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5483 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5484 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5485 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5486 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5487 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5488 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5489 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5490
5491 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5492 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5493 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5494 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5495 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5496
5497 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5498 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5499 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5500 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5501
5502 /* (1) - may have excess leds enabled on MSB */
5503
5504 /* Defaults (order matters, keep last, don't reorder!) */
5505 { /* Lenovo */
5506 .vendor = PCI_VENDOR_ID_LENOVO,
5507 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5508 .quirks = 0x1fffU,
5509 },
5510 { /* IBM ThinkPads with no EC version string */
5511 .vendor = PCI_VENDOR_ID_IBM,
5512 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5513 .quirks = 0x00ffU,
5514 },
5515 { /* IBM ThinkPads with EC version string */
5516 .vendor = PCI_VENDOR_ID_IBM,
5517 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5518 .quirks = 0x00bfU,
5519 },
5520 };
5521
5522 #undef TPACPI_LEDQ_IBM
5523 #undef TPACPI_LEDQ_LNV
5524
5525 static enum led_access_mode __init led_init_detect_mode(void)
5526 {
5527 acpi_status status;
5528
5529 if (tpacpi_is_ibm()) {
5530 /* 570 */
5531 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5532 if (ACPI_SUCCESS(status))
5533 return TPACPI_LED_570;
5534
5535 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5536 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5537 if (ACPI_SUCCESS(status))
5538 return TPACPI_LED_OLD;
5539 }
5540
5541 /* most others */
5542 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5543 if (ACPI_SUCCESS(status))
5544 return TPACPI_LED_NEW;
5545
5546 /* R30, R31, and unknown firmwares */
5547 led_handle = NULL;
5548 return TPACPI_LED_NONE;
5549 }
5550
5551 static int __init led_init(struct ibm_init_struct *iibm)
5552 {
5553 unsigned int i;
5554 int rc;
5555 unsigned long useful_leds;
5556
5557 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5558
5559 led_supported = led_init_detect_mode();
5560
5561 if (led_supported != TPACPI_LED_NONE) {
5562 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5563 ARRAY_SIZE(led_useful_qtable));
5564
5565 if (!useful_leds) {
5566 led_handle = NULL;
5567 led_supported = TPACPI_LED_NONE;
5568 }
5569 }
5570
5571 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5572 str_supported(led_supported), led_supported);
5573
5574 if (led_supported == TPACPI_LED_NONE)
5575 return 1;
5576
5577 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5578 GFP_KERNEL);
5579 if (!tpacpi_leds) {
5580 pr_err("Out of memory for LED data\n");
5581 return -ENOMEM;
5582 }
5583
5584 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5585 tpacpi_leds[i].led = -1;
5586
5587 if (!tpacpi_is_led_restricted(i) &&
5588 test_bit(i, &useful_leds)) {
5589 rc = tpacpi_init_led(i);
5590 if (rc < 0) {
5591 led_exit();
5592 return rc;
5593 }
5594 }
5595 }
5596
5597 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5598 pr_notice("warning: userspace override of important "
5599 "firmware LEDs is enabled\n");
5600 #endif
5601 return 0;
5602 }
5603
5604 #define str_led_status(s) \
5605 ((s) == TPACPI_LED_OFF ? "off" : \
5606 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5607
5608 static int led_read(struct seq_file *m)
5609 {
5610 if (!led_supported) {
5611 seq_printf(m, "status:\t\tnot supported\n");
5612 return 0;
5613 }
5614 seq_printf(m, "status:\t\tsupported\n");
5615
5616 if (led_supported == TPACPI_LED_570) {
5617 /* 570 */
5618 int i, status;
5619 for (i = 0; i < 8; i++) {
5620 status = led_get_status(i);
5621 if (status < 0)
5622 return -EIO;
5623 seq_printf(m, "%d:\t\t%s\n",
5624 i, str_led_status(status));
5625 }
5626 }
5627
5628 seq_printf(m, "commands:\t"
5629 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5630
5631 return 0;
5632 }
5633
5634 static int led_write(char *buf)
5635 {
5636 char *cmd;
5637 int led, rc;
5638 enum led_status_t s;
5639
5640 if (!led_supported)
5641 return -ENODEV;
5642
5643 while ((cmd = next_cmd(&buf))) {
5644 if (sscanf(cmd, "%d", &led) != 1)
5645 return -EINVAL;
5646
5647 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) ||
5648 tpacpi_leds[led].led < 0)
5649 return -ENODEV;
5650
5651 if (strstr(cmd, "off")) {
5652 s = TPACPI_LED_OFF;
5653 } else if (strstr(cmd, "on")) {
5654 s = TPACPI_LED_ON;
5655 } else if (strstr(cmd, "blink")) {
5656 s = TPACPI_LED_BLINK;
5657 } else {
5658 return -EINVAL;
5659 }
5660
5661 rc = led_set_status(led, s);
5662 if (rc < 0)
5663 return rc;
5664 }
5665
5666 return 0;
5667 }
5668
5669 static struct ibm_struct led_driver_data = {
5670 .name = "led",
5671 .read = led_read,
5672 .write = led_write,
5673 .exit = led_exit,
5674 };
5675
5676 /*************************************************************************
5677 * Beep subdriver
5678 */
5679
5680 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5681
5682 #define TPACPI_BEEP_Q1 0x0001
5683
5684 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5685 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5686 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5687 };
5688
5689 static int __init beep_init(struct ibm_init_struct *iibm)
5690 {
5691 unsigned long quirks;
5692
5693 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5694
5695 TPACPI_ACPIHANDLE_INIT(beep);
5696
5697 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5698 str_supported(beep_handle != NULL));
5699
5700 quirks = tpacpi_check_quirks(beep_quirk_table,
5701 ARRAY_SIZE(beep_quirk_table));
5702
5703 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5704
5705 return (beep_handle) ? 0 : 1;
5706 }
5707
5708 static int beep_read(struct seq_file *m)
5709 {
5710 if (!beep_handle)
5711 seq_printf(m, "status:\t\tnot supported\n");
5712 else {
5713 seq_printf(m, "status:\t\tsupported\n");
5714 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5715 }
5716
5717 return 0;
5718 }
5719
5720 static int beep_write(char *buf)
5721 {
5722 char *cmd;
5723 int beep_cmd;
5724
5725 if (!beep_handle)
5726 return -ENODEV;
5727
5728 while ((cmd = next_cmd(&buf))) {
5729 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5730 beep_cmd >= 0 && beep_cmd <= 17) {
5731 /* beep_cmd set */
5732 } else
5733 return -EINVAL;
5734 if (tp_features.beep_needs_two_args) {
5735 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5736 beep_cmd, 0))
5737 return -EIO;
5738 } else {
5739 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5740 beep_cmd))
5741 return -EIO;
5742 }
5743 }
5744
5745 return 0;
5746 }
5747
5748 static struct ibm_struct beep_driver_data = {
5749 .name = "beep",
5750 .read = beep_read,
5751 .write = beep_write,
5752 };
5753
5754 /*************************************************************************
5755 * Thermal subdriver
5756 */
5757
5758 enum thermal_access_mode {
5759 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5760 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5761 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5762 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5763 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5764 };
5765
5766 enum { /* TPACPI_THERMAL_TPEC_* */
5767 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5768 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5769 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5770
5771 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5772 };
5773
5774
5775 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5776 struct ibm_thermal_sensors_struct {
5777 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5778 };
5779
5780 static enum thermal_access_mode thermal_read_mode;
5781
5782 /* idx is zero-based */
5783 static int thermal_get_sensor(int idx, s32 *value)
5784 {
5785 int t;
5786 s8 tmp;
5787 char tmpi[5];
5788
5789 t = TP_EC_THERMAL_TMP0;
5790
5791 switch (thermal_read_mode) {
5792 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5793 case TPACPI_THERMAL_TPEC_16:
5794 if (idx >= 8 && idx <= 15) {
5795 t = TP_EC_THERMAL_TMP8;
5796 idx -= 8;
5797 }
5798 /* fallthrough */
5799 #endif
5800 case TPACPI_THERMAL_TPEC_8:
5801 if (idx <= 7) {
5802 if (!acpi_ec_read(t + idx, &tmp))
5803 return -EIO;
5804 *value = tmp * 1000;
5805 return 0;
5806 }
5807 break;
5808
5809 case TPACPI_THERMAL_ACPI_UPDT:
5810 if (idx <= 7) {
5811 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5812 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5813 return -EIO;
5814 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5815 return -EIO;
5816 *value = (t - 2732) * 100;
5817 return 0;
5818 }
5819 break;
5820
5821 case TPACPI_THERMAL_ACPI_TMP07:
5822 if (idx <= 7) {
5823 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5824 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5825 return -EIO;
5826 if (t > 127 || t < -127)
5827 t = TP_EC_THERMAL_TMP_NA;
5828 *value = t * 1000;
5829 return 0;
5830 }
5831 break;
5832
5833 case TPACPI_THERMAL_NONE:
5834 default:
5835 return -ENOSYS;
5836 }
5837
5838 return -EINVAL;
5839 }
5840
5841 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5842 {
5843 int res, i;
5844 int n;
5845
5846 n = 8;
5847 i = 0;
5848
5849 if (!s)
5850 return -EINVAL;
5851
5852 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5853 n = 16;
5854
5855 for (i = 0 ; i < n; i++) {
5856 res = thermal_get_sensor(i, &s->temp[i]);
5857 if (res)
5858 return res;
5859 }
5860
5861 return n;
5862 }
5863
5864 static void thermal_dump_all_sensors(void)
5865 {
5866 int n, i;
5867 struct ibm_thermal_sensors_struct t;
5868
5869 n = thermal_get_sensors(&t);
5870 if (n <= 0)
5871 return;
5872
5873 pr_notice("temperatures (Celsius):");
5874
5875 for (i = 0; i < n; i++) {
5876 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5877 pr_cont(" %d", (int)(t.temp[i] / 1000));
5878 else
5879 pr_cont(" N/A");
5880 }
5881
5882 pr_cont("\n");
5883 }
5884
5885 /* sysfs temp##_input -------------------------------------------------- */
5886
5887 static ssize_t thermal_temp_input_show(struct device *dev,
5888 struct device_attribute *attr,
5889 char *buf)
5890 {
5891 struct sensor_device_attribute *sensor_attr =
5892 to_sensor_dev_attr(attr);
5893 int idx = sensor_attr->index;
5894 s32 value;
5895 int res;
5896
5897 res = thermal_get_sensor(idx, &value);
5898 if (res)
5899 return res;
5900 if (value == TPACPI_THERMAL_SENSOR_NA)
5901 return -ENXIO;
5902
5903 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5904 }
5905
5906 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5907 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5908 thermal_temp_input_show, NULL, _idxB)
5909
5910 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5911 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5912 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5913 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5914 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5915 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5916 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5917 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5918 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5919 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5920 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5921 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5922 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5923 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5924 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5925 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5926 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5927 };
5928
5929 #define THERMAL_ATTRS(X) \
5930 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5931
5932 static struct attribute *thermal_temp_input_attr[] = {
5933 THERMAL_ATTRS(8),
5934 THERMAL_ATTRS(9),
5935 THERMAL_ATTRS(10),
5936 THERMAL_ATTRS(11),
5937 THERMAL_ATTRS(12),
5938 THERMAL_ATTRS(13),
5939 THERMAL_ATTRS(14),
5940 THERMAL_ATTRS(15),
5941 THERMAL_ATTRS(0),
5942 THERMAL_ATTRS(1),
5943 THERMAL_ATTRS(2),
5944 THERMAL_ATTRS(3),
5945 THERMAL_ATTRS(4),
5946 THERMAL_ATTRS(5),
5947 THERMAL_ATTRS(6),
5948 THERMAL_ATTRS(7),
5949 NULL
5950 };
5951
5952 static const struct attribute_group thermal_temp_input16_group = {
5953 .attrs = thermal_temp_input_attr
5954 };
5955
5956 static const struct attribute_group thermal_temp_input8_group = {
5957 .attrs = &thermal_temp_input_attr[8]
5958 };
5959
5960 #undef THERMAL_SENSOR_ATTR_TEMP
5961 #undef THERMAL_ATTRS
5962
5963 /* --------------------------------------------------------------------- */
5964
5965 static int __init thermal_init(struct ibm_init_struct *iibm)
5966 {
5967 u8 t, ta1, ta2;
5968 int i;
5969 int acpi_tmp7;
5970 int res;
5971
5972 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5973
5974 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5975
5976 if (thinkpad_id.ec_model) {
5977 /*
5978 * Direct EC access mode: sensors at registers
5979 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5980 * non-implemented, thermal sensors return 0x80 when
5981 * not available
5982 */
5983
5984 ta1 = ta2 = 0;
5985 for (i = 0; i < 8; i++) {
5986 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5987 ta1 |= t;
5988 } else {
5989 ta1 = 0;
5990 break;
5991 }
5992 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5993 ta2 |= t;
5994 } else {
5995 ta1 = 0;
5996 break;
5997 }
5998 }
5999 if (ta1 == 0) {
6000 /* This is sheer paranoia, but we handle it anyway */
6001 if (acpi_tmp7) {
6002 pr_err("ThinkPad ACPI EC access misbehaving, "
6003 "falling back to ACPI TMPx access "
6004 "mode\n");
6005 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6006 } else {
6007 pr_err("ThinkPad ACPI EC access misbehaving, "
6008 "disabling thermal sensors access\n");
6009 thermal_read_mode = TPACPI_THERMAL_NONE;
6010 }
6011 } else {
6012 thermal_read_mode =
6013 (ta2 != 0) ?
6014 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6015 }
6016 } else if (acpi_tmp7) {
6017 if (tpacpi_is_ibm() &&
6018 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6019 /* 600e/x, 770e, 770x */
6020 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6021 } else {
6022 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6023 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6024 }
6025 } else {
6026 /* temperatures not supported on 570, G4x, R30, R31, R32 */
6027 thermal_read_mode = TPACPI_THERMAL_NONE;
6028 }
6029
6030 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6031 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6032 thermal_read_mode);
6033
6034 switch (thermal_read_mode) {
6035 case TPACPI_THERMAL_TPEC_16:
6036 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6037 &thermal_temp_input16_group);
6038 if (res)
6039 return res;
6040 break;
6041 case TPACPI_THERMAL_TPEC_8:
6042 case TPACPI_THERMAL_ACPI_TMP07:
6043 case TPACPI_THERMAL_ACPI_UPDT:
6044 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6045 &thermal_temp_input8_group);
6046 if (res)
6047 return res;
6048 break;
6049 case TPACPI_THERMAL_NONE:
6050 default:
6051 return 1;
6052 }
6053
6054 return 0;
6055 }
6056
6057 static void thermal_exit(void)
6058 {
6059 switch (thermal_read_mode) {
6060 case TPACPI_THERMAL_TPEC_16:
6061 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6062 &thermal_temp_input16_group);
6063 break;
6064 case TPACPI_THERMAL_TPEC_8:
6065 case TPACPI_THERMAL_ACPI_TMP07:
6066 case TPACPI_THERMAL_ACPI_UPDT:
6067 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6068 &thermal_temp_input8_group);
6069 break;
6070 case TPACPI_THERMAL_NONE:
6071 default:
6072 break;
6073 }
6074 }
6075
6076 static int thermal_read(struct seq_file *m)
6077 {
6078 int n, i;
6079 struct ibm_thermal_sensors_struct t;
6080
6081 n = thermal_get_sensors(&t);
6082 if (unlikely(n < 0))
6083 return n;
6084
6085 seq_printf(m, "temperatures:\t");
6086
6087 if (n > 0) {
6088 for (i = 0; i < (n - 1); i++)
6089 seq_printf(m, "%d ", t.temp[i] / 1000);
6090 seq_printf(m, "%d\n", t.temp[i] / 1000);
6091 } else
6092 seq_printf(m, "not supported\n");
6093
6094 return 0;
6095 }
6096
6097 static struct ibm_struct thermal_driver_data = {
6098 .name = "thermal",
6099 .read = thermal_read,
6100 .exit = thermal_exit,
6101 };
6102
6103 /*************************************************************************
6104 * Backlight/brightness subdriver
6105 */
6106
6107 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6108
6109 /*
6110 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6111 * CMOS NVRAM byte 0x5E, bits 0-3.
6112 *
6113 * EC HBRV (0x31) has the following layout
6114 * Bit 7: unknown function
6115 * Bit 6: unknown function
6116 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
6117 * Bit 4: must be set to zero to avoid problems
6118 * Bit 3-0: backlight brightness level
6119 *
6120 * brightness_get_raw returns status data in the HBRV layout
6121 *
6122 * WARNING: The X61 has been verified to use HBRV for something else, so
6123 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6124 * testing on the very early *60 Lenovo models...
6125 */
6126
6127 enum {
6128 TP_EC_BACKLIGHT = 0x31,
6129
6130 /* TP_EC_BACKLIGHT bitmasks */
6131 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6132 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6133 TP_EC_BACKLIGHT_MAPSW = 0x20,
6134 };
6135
6136 enum tpacpi_brightness_access_mode {
6137 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
6138 TPACPI_BRGHT_MODE_EC, /* EC control */
6139 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
6140 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6141 TPACPI_BRGHT_MODE_MAX
6142 };
6143
6144 static struct backlight_device *ibm_backlight_device;
6145
6146 static enum tpacpi_brightness_access_mode brightness_mode =
6147 TPACPI_BRGHT_MODE_MAX;
6148
6149 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6150
6151 static struct mutex brightness_mutex;
6152
6153 /* NVRAM brightness access,
6154 * call with brightness_mutex held! */
6155 static unsigned int tpacpi_brightness_nvram_get(void)
6156 {
6157 u8 lnvram;
6158
6159 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6160 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6161 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6162 lnvram &= bright_maxlvl;
6163
6164 return lnvram;
6165 }
6166
6167 static void tpacpi_brightness_checkpoint_nvram(void)
6168 {
6169 u8 lec = 0;
6170 u8 b_nvram;
6171
6172 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6173 return;
6174
6175 vdbg_printk(TPACPI_DBG_BRGHT,
6176 "trying to checkpoint backlight level to NVRAM...\n");
6177
6178 if (mutex_lock_killable(&brightness_mutex) < 0)
6179 return;
6180
6181 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6182 goto unlock;
6183 lec &= TP_EC_BACKLIGHT_LVLMSK;
6184 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6185
6186 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6187 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6188 /* NVRAM needs update */
6189 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6190 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6191 b_nvram |= lec;
6192 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6193 dbg_printk(TPACPI_DBG_BRGHT,
6194 "updated NVRAM backlight level to %u (0x%02x)\n",
6195 (unsigned int) lec, (unsigned int) b_nvram);
6196 } else
6197 vdbg_printk(TPACPI_DBG_BRGHT,
6198 "NVRAM backlight level already is %u (0x%02x)\n",
6199 (unsigned int) lec, (unsigned int) b_nvram);
6200
6201 unlock:
6202 mutex_unlock(&brightness_mutex);
6203 }
6204
6205
6206 /* call with brightness_mutex held! */
6207 static int tpacpi_brightness_get_raw(int *status)
6208 {
6209 u8 lec = 0;
6210
6211 switch (brightness_mode) {
6212 case TPACPI_BRGHT_MODE_UCMS_STEP:
6213 *status = tpacpi_brightness_nvram_get();
6214 return 0;
6215 case TPACPI_BRGHT_MODE_EC:
6216 case TPACPI_BRGHT_MODE_ECNVRAM:
6217 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6218 return -EIO;
6219 *status = lec;
6220 return 0;
6221 default:
6222 return -ENXIO;
6223 }
6224 }
6225
6226 /* call with brightness_mutex held! */
6227 /* do NOT call with illegal backlight level value */
6228 static int tpacpi_brightness_set_ec(unsigned int value)
6229 {
6230 u8 lec = 0;
6231
6232 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6233 return -EIO;
6234
6235 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6236 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6237 (value & TP_EC_BACKLIGHT_LVLMSK))))
6238 return -EIO;
6239
6240 return 0;
6241 }
6242
6243 /* call with brightness_mutex held! */
6244 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6245 {
6246 int cmos_cmd, inc;
6247 unsigned int current_value, i;
6248
6249 current_value = tpacpi_brightness_nvram_get();
6250
6251 if (value == current_value)
6252 return 0;
6253
6254 cmos_cmd = (value > current_value) ?
6255 TP_CMOS_BRIGHTNESS_UP :
6256 TP_CMOS_BRIGHTNESS_DOWN;
6257 inc = (value > current_value) ? 1 : -1;
6258
6259 for (i = current_value; i != value; i += inc)
6260 if (issue_thinkpad_cmos_command(cmos_cmd))
6261 return -EIO;
6262
6263 return 0;
6264 }
6265
6266 /* May return EINTR which can always be mapped to ERESTARTSYS */
6267 static int brightness_set(unsigned int value)
6268 {
6269 int res;
6270
6271 if (value > bright_maxlvl)
6272 return -EINVAL;
6273
6274 vdbg_printk(TPACPI_DBG_BRGHT,
6275 "set backlight level to %d\n", value);
6276
6277 res = mutex_lock_killable(&brightness_mutex);
6278 if (res < 0)
6279 return res;
6280
6281 switch (brightness_mode) {
6282 case TPACPI_BRGHT_MODE_EC:
6283 case TPACPI_BRGHT_MODE_ECNVRAM:
6284 res = tpacpi_brightness_set_ec(value);
6285 break;
6286 case TPACPI_BRGHT_MODE_UCMS_STEP:
6287 res = tpacpi_brightness_set_ucmsstep(value);
6288 break;
6289 default:
6290 res = -ENXIO;
6291 }
6292
6293 mutex_unlock(&brightness_mutex);
6294 return res;
6295 }
6296
6297 /* sysfs backlight class ----------------------------------------------- */
6298
6299 static int brightness_update_status(struct backlight_device *bd)
6300 {
6301 unsigned int level =
6302 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6303 bd->props.power == FB_BLANK_UNBLANK) ?
6304 bd->props.brightness : 0;
6305
6306 dbg_printk(TPACPI_DBG_BRGHT,
6307 "backlight: attempt to set level to %d\n",
6308 level);
6309
6310 /* it is the backlight class's job (caller) to handle
6311 * EINTR and other errors properly */
6312 return brightness_set(level);
6313 }
6314
6315 static int brightness_get(struct backlight_device *bd)
6316 {
6317 int status, res;
6318
6319 res = mutex_lock_killable(&brightness_mutex);
6320 if (res < 0)
6321 return 0;
6322
6323 res = tpacpi_brightness_get_raw(&status);
6324
6325 mutex_unlock(&brightness_mutex);
6326
6327 if (res < 0)
6328 return 0;
6329
6330 return status & TP_EC_BACKLIGHT_LVLMSK;
6331 }
6332
6333 static void tpacpi_brightness_notify_change(void)
6334 {
6335 backlight_force_update(ibm_backlight_device,
6336 BACKLIGHT_UPDATE_HOTKEY);
6337 }
6338
6339 static const struct backlight_ops ibm_backlight_data = {
6340 .get_brightness = brightness_get,
6341 .update_status = brightness_update_status,
6342 };
6343
6344 /* --------------------------------------------------------------------- */
6345
6346 /*
6347 * Call _BCL method of video device. On some ThinkPads this will
6348 * switch the firmware to the ACPI brightness control mode.
6349 */
6350
6351 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6352 {
6353 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6354 union acpi_object *obj;
6355 struct acpi_device *device, *child;
6356 int rc;
6357
6358 if (acpi_bus_get_device(handle, &device))
6359 return 0;
6360
6361 rc = 0;
6362 list_for_each_entry(child, &device->children, node) {
6363 acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
6364 NULL, &buffer);
6365 if (ACPI_FAILURE(status))
6366 continue;
6367
6368 obj = (union acpi_object *)buffer.pointer;
6369 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6370 pr_err("Unknown _BCL data, please report this to %s\n",
6371 TPACPI_MAIL);
6372 rc = 0;
6373 } else {
6374 rc = obj->package.count;
6375 }
6376 break;
6377 }
6378
6379 kfree(buffer.pointer);
6380 return rc;
6381 }
6382
6383
6384 /*
6385 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6386 */
6387 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6388 {
6389 acpi_handle video_device;
6390 int bcl_levels = 0;
6391
6392 tpacpi_acpi_handle_locate("video", NULL, &video_device);
6393 if (video_device)
6394 bcl_levels = tpacpi_query_bcl_levels(video_device);
6395
6396 tp_features.bright_acpimode = (bcl_levels > 0);
6397
6398 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6399 }
6400
6401 /*
6402 * These are only useful for models that have only one possibility
6403 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6404 * these quirks.
6405 */
6406 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6407 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6408 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6409
6410 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6411 /* Models with ATI GPUs known to require ECNVRAM mode */
6412 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6413
6414 /* Models with ATI GPUs that can use ECNVRAM */
6415 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6416 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6417 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6418 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6419
6420 /* Models with Intel Extreme Graphics 2 */
6421 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6422 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6423 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6424
6425 /* Models with Intel GMA900 */
6426 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6427 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6428 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6429 };
6430
6431 /*
6432 * Returns < 0 for error, otherwise sets tp_features.bright_*
6433 * and bright_maxlvl.
6434 */
6435 static void __init tpacpi_detect_brightness_capabilities(void)
6436 {
6437 unsigned int b;
6438
6439 vdbg_printk(TPACPI_DBG_INIT,
6440 "detecting firmware brightness interface capabilities\n");
6441
6442 /* we could run a quirks check here (same table used by
6443 * brightness_init) if needed */
6444
6445 /*
6446 * We always attempt to detect acpi support, so as to switch
6447 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6448 * going to publish a backlight interface
6449 */
6450 b = tpacpi_check_std_acpi_brightness_support();
6451 switch (b) {
6452 case 16:
6453 bright_maxlvl = 15;
6454 pr_info("detected a 16-level brightness capable ThinkPad\n");
6455 break;
6456 case 8:
6457 case 0:
6458 bright_maxlvl = 7;
6459 pr_info("detected a 8-level brightness capable ThinkPad\n");
6460 break;
6461 default:
6462 pr_info("Unsupported brightness interface\n");
6463 tp_features.bright_unkfw = 1;
6464 bright_maxlvl = b - 1;
6465 }
6466 }
6467
6468 static int __init brightness_init(struct ibm_init_struct *iibm)
6469 {
6470 struct backlight_properties props;
6471 int b;
6472 unsigned long quirks;
6473
6474 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6475
6476 mutex_init(&brightness_mutex);
6477
6478 quirks = tpacpi_check_quirks(brightness_quirk_table,
6479 ARRAY_SIZE(brightness_quirk_table));
6480
6481 /* tpacpi_detect_brightness_capabilities() must have run already */
6482
6483 /* if it is unknown, we don't handle it: it wouldn't be safe */
6484 if (tp_features.bright_unkfw)
6485 return 1;
6486
6487 if (!brightness_enable) {
6488 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6489 "brightness support disabled by "
6490 "module parameter\n");
6491 return 1;
6492 }
6493
6494 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6495 if (brightness_enable > 1) {
6496 pr_info("Standard ACPI backlight interface "
6497 "available, not loading native one\n");
6498 return 1;
6499 } else if (brightness_enable == 1) {
6500 pr_warn("Cannot enable backlight brightness support, "
6501 "ACPI is already handling it. Refer to the "
6502 "acpi_backlight kernel parameter.\n");
6503 return 1;
6504 }
6505 } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6506 pr_notice("Standard ACPI backlight interface not "
6507 "available, thinkpad_acpi native "
6508 "brightness control enabled\n");
6509 }
6510
6511 /*
6512 * Check for module parameter bogosity, note that we
6513 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6514 * able to detect "unspecified"
6515 */
6516 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6517 return -EINVAL;
6518
6519 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6520 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6521 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6522 if (quirks & TPACPI_BRGHT_Q_EC)
6523 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6524 else
6525 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6526
6527 dbg_printk(TPACPI_DBG_BRGHT,
6528 "driver auto-selected brightness_mode=%d\n",
6529 brightness_mode);
6530 }
6531
6532 /* Safety */
6533 if (!tpacpi_is_ibm() &&
6534 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6535 brightness_mode == TPACPI_BRGHT_MODE_EC))
6536 return -EINVAL;
6537
6538 if (tpacpi_brightness_get_raw(&b) < 0)
6539 return 1;
6540
6541 memset(&props, 0, sizeof(struct backlight_properties));
6542 props.type = BACKLIGHT_PLATFORM;
6543 props.max_brightness = bright_maxlvl;
6544 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6545 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6546 NULL, NULL,
6547 &ibm_backlight_data,
6548 &props);
6549 if (IS_ERR(ibm_backlight_device)) {
6550 int rc = PTR_ERR(ibm_backlight_device);
6551 ibm_backlight_device = NULL;
6552 pr_err("Could not register backlight device\n");
6553 return rc;
6554 }
6555 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6556 "brightness is supported\n");
6557
6558 if (quirks & TPACPI_BRGHT_Q_ASK) {
6559 pr_notice("brightness: will use unverified default: "
6560 "brightness_mode=%d\n", brightness_mode);
6561 pr_notice("brightness: please report to %s whether it works well "
6562 "or not on your ThinkPad\n", TPACPI_MAIL);
6563 }
6564
6565 /* Added by mistake in early 2007. Probably useless, but it could
6566 * be working around some unknown firmware problem where the value
6567 * read at startup doesn't match the real hardware state... so leave
6568 * it in place just in case */
6569 backlight_update_status(ibm_backlight_device);
6570
6571 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6572 "brightness: registering brightness hotkeys "
6573 "as change notification\n");
6574 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6575 | TP_ACPI_HKEY_BRGHTUP_MASK
6576 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6577 return 0;
6578 }
6579
6580 static void brightness_suspend(void)
6581 {
6582 tpacpi_brightness_checkpoint_nvram();
6583 }
6584
6585 static void brightness_shutdown(void)
6586 {
6587 tpacpi_brightness_checkpoint_nvram();
6588 }
6589
6590 static void brightness_exit(void)
6591 {
6592 if (ibm_backlight_device) {
6593 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6594 "calling backlight_device_unregister()\n");
6595 backlight_device_unregister(ibm_backlight_device);
6596 }
6597
6598 tpacpi_brightness_checkpoint_nvram();
6599 }
6600
6601 static int brightness_read(struct seq_file *m)
6602 {
6603 int level;
6604
6605 level = brightness_get(NULL);
6606 if (level < 0) {
6607 seq_printf(m, "level:\t\tunreadable\n");
6608 } else {
6609 seq_printf(m, "level:\t\t%d\n", level);
6610 seq_printf(m, "commands:\tup, down\n");
6611 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6612 bright_maxlvl);
6613 }
6614
6615 return 0;
6616 }
6617
6618 static int brightness_write(char *buf)
6619 {
6620 int level;
6621 int rc;
6622 char *cmd;
6623
6624 level = brightness_get(NULL);
6625 if (level < 0)
6626 return level;
6627
6628 while ((cmd = next_cmd(&buf))) {
6629 if (strlencmp(cmd, "up") == 0) {
6630 if (level < bright_maxlvl)
6631 level++;
6632 } else if (strlencmp(cmd, "down") == 0) {
6633 if (level > 0)
6634 level--;
6635 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6636 level >= 0 && level <= bright_maxlvl) {
6637 /* new level set */
6638 } else
6639 return -EINVAL;
6640 }
6641
6642 tpacpi_disclose_usertask("procfs brightness",
6643 "set level to %d\n", level);
6644
6645 /*
6646 * Now we know what the final level should be, so we try to set it.
6647 * Doing it this way makes the syscall restartable in case of EINTR
6648 */
6649 rc = brightness_set(level);
6650 if (!rc && ibm_backlight_device)
6651 backlight_force_update(ibm_backlight_device,
6652 BACKLIGHT_UPDATE_SYSFS);
6653 return (rc == -EINTR) ? -ERESTARTSYS : rc;
6654 }
6655
6656 static struct ibm_struct brightness_driver_data = {
6657 .name = "brightness",
6658 .read = brightness_read,
6659 .write = brightness_write,
6660 .exit = brightness_exit,
6661 .suspend = brightness_suspend,
6662 .shutdown = brightness_shutdown,
6663 };
6664
6665 /*************************************************************************
6666 * Volume subdriver
6667 */
6668
6669 /*
6670 * IBM ThinkPads have a simple volume controller with MUTE gating.
6671 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6672 *
6673 * Since the *61 series (and probably also the later *60 series), Lenovo
6674 * ThinkPads only implement the MUTE gate.
6675 *
6676 * EC register 0x30
6677 * Bit 6: MUTE (1 mutes sound)
6678 * Bit 3-0: Volume
6679 * Other bits should be zero as far as we know.
6680 *
6681 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6682 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6683 * such as bit 7 which is used to detect repeated presses of MUTE,
6684 * and we leave them unchanged.
6685 *
6686 * On newer Lenovo ThinkPads, the EC can automatically change the volume
6687 * in response to user input. Unfortunately, this rarely works well.
6688 * The laptop changes the state of its internal MUTE gate and, on some
6689 * models, sends KEY_MUTE, causing any user code that responds to the
6690 * mute button to get confused. The hardware MUTE gate is also
6691 * unnecessary, since user code can handle the mute button without
6692 * kernel or EC help.
6693 *
6694 * To avoid confusing userspace, we simply disable all EC-based mute
6695 * and volume controls when possible.
6696 */
6697
6698 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6699
6700 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6701 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6702 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6703
6704 #if SNDRV_CARDS <= 32
6705 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1)
6706 #else
6707 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1)
6708 #endif
6709 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
6710 static char *alsa_id = "ThinkPadEC";
6711 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
6712
6713 struct tpacpi_alsa_data {
6714 struct snd_card *card;
6715 struct snd_ctl_elem_id *ctl_mute_id;
6716 struct snd_ctl_elem_id *ctl_vol_id;
6717 };
6718
6719 static struct snd_card *alsa_card;
6720
6721 enum {
6722 TP_EC_AUDIO = 0x30,
6723
6724 /* TP_EC_AUDIO bits */
6725 TP_EC_AUDIO_MUTESW = 6,
6726
6727 /* TP_EC_AUDIO bitmasks */
6728 TP_EC_AUDIO_LVL_MSK = 0x0F,
6729 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6730
6731 /* Maximum volume */
6732 TP_EC_VOLUME_MAX = 14,
6733 };
6734
6735 enum tpacpi_volume_access_mode {
6736 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6737 TPACPI_VOL_MODE_EC, /* Pure EC control */
6738 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6739 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6740 TPACPI_VOL_MODE_MAX
6741 };
6742
6743 enum tpacpi_volume_capabilities {
6744 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6745 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6746 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6747 TPACPI_VOL_CAP_MAX
6748 };
6749
6750 enum tpacpi_mute_btn_mode {
6751 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */
6752 /* We don't know what mode 1 is. */
6753 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */
6754 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */
6755 };
6756
6757 static enum tpacpi_volume_access_mode volume_mode =
6758 TPACPI_VOL_MODE_MAX;
6759
6760 static enum tpacpi_volume_capabilities volume_capabilities;
6761 static bool volume_control_allowed;
6762 static bool software_mute_requested = true;
6763 static bool software_mute_active;
6764 static int software_mute_orig_mode;
6765
6766 /*
6767 * Used to syncronize writers to TP_EC_AUDIO and
6768 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6769 */
6770 static struct mutex volume_mutex;
6771
6772 static void tpacpi_volume_checkpoint_nvram(void)
6773 {
6774 u8 lec = 0;
6775 u8 b_nvram;
6776 u8 ec_mask;
6777
6778 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6779 return;
6780 if (!volume_control_allowed)
6781 return;
6782 if (software_mute_active)
6783 return;
6784
6785 vdbg_printk(TPACPI_DBG_MIXER,
6786 "trying to checkpoint mixer state to NVRAM...\n");
6787
6788 if (tp_features.mixer_no_level_control)
6789 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6790 else
6791 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6792
6793 if (mutex_lock_killable(&volume_mutex) < 0)
6794 return;
6795
6796 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6797 goto unlock;
6798 lec &= ec_mask;
6799 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6800
6801 if (lec != (b_nvram & ec_mask)) {
6802 /* NVRAM needs update */
6803 b_nvram &= ~ec_mask;
6804 b_nvram |= lec;
6805 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6806 dbg_printk(TPACPI_DBG_MIXER,
6807 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6808 (unsigned int) lec, (unsigned int) b_nvram);
6809 } else {
6810 vdbg_printk(TPACPI_DBG_MIXER,
6811 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6812 (unsigned int) lec, (unsigned int) b_nvram);
6813 }
6814
6815 unlock:
6816 mutex_unlock(&volume_mutex);
6817 }
6818
6819 static int volume_get_status_ec(u8 *status)
6820 {
6821 u8 s;
6822
6823 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6824 return -EIO;
6825
6826 *status = s;
6827
6828 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6829
6830 return 0;
6831 }
6832
6833 static int volume_get_status(u8 *status)
6834 {
6835 return volume_get_status_ec(status);
6836 }
6837
6838 static int volume_set_status_ec(const u8 status)
6839 {
6840 if (!acpi_ec_write(TP_EC_AUDIO, status))
6841 return -EIO;
6842
6843 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6844
6845 /*
6846 * On X200s, and possibly on others, it can take a while for
6847 * reads to become correct.
6848 */
6849 msleep(1);
6850
6851 return 0;
6852 }
6853
6854 static int volume_set_status(const u8 status)
6855 {
6856 return volume_set_status_ec(status);
6857 }
6858
6859 /* returns < 0 on error, 0 on no change, 1 on change */
6860 static int __volume_set_mute_ec(const bool mute)
6861 {
6862 int rc;
6863 u8 s, n;
6864
6865 if (mutex_lock_killable(&volume_mutex) < 0)
6866 return -EINTR;
6867
6868 rc = volume_get_status_ec(&s);
6869 if (rc)
6870 goto unlock;
6871
6872 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6873 s & ~TP_EC_AUDIO_MUTESW_MSK;
6874
6875 if (n != s) {
6876 rc = volume_set_status_ec(n);
6877 if (!rc)
6878 rc = 1;
6879 }
6880
6881 unlock:
6882 mutex_unlock(&volume_mutex);
6883 return rc;
6884 }
6885
6886 static int volume_alsa_set_mute(const bool mute)
6887 {
6888 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6889 (mute) ? "" : "un");
6890 return __volume_set_mute_ec(mute);
6891 }
6892
6893 static int volume_set_mute(const bool mute)
6894 {
6895 int rc;
6896
6897 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6898 (mute) ? "" : "un");
6899
6900 rc = __volume_set_mute_ec(mute);
6901 return (rc < 0) ? rc : 0;
6902 }
6903
6904 /* returns < 0 on error, 0 on no change, 1 on change */
6905 static int __volume_set_volume_ec(const u8 vol)
6906 {
6907 int rc;
6908 u8 s, n;
6909
6910 if (vol > TP_EC_VOLUME_MAX)
6911 return -EINVAL;
6912
6913 if (mutex_lock_killable(&volume_mutex) < 0)
6914 return -EINTR;
6915
6916 rc = volume_get_status_ec(&s);
6917 if (rc)
6918 goto unlock;
6919
6920 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6921
6922 if (n != s) {
6923 rc = volume_set_status_ec(n);
6924 if (!rc)
6925 rc = 1;
6926 }
6927
6928 unlock:
6929 mutex_unlock(&volume_mutex);
6930 return rc;
6931 }
6932
6933 static int volume_set_software_mute(bool startup)
6934 {
6935 int result;
6936
6937 if (!tpacpi_is_lenovo())
6938 return -ENODEV;
6939
6940 if (startup) {
6941 if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
6942 "HAUM", "qd"))
6943 return -EIO;
6944
6945 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6946 "Initial HAUM setting was %d\n",
6947 software_mute_orig_mode);
6948 }
6949
6950 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
6951 (int)TP_EC_MUTE_BTN_NONE))
6952 return -EIO;
6953
6954 if (result != TP_EC_MUTE_BTN_NONE)
6955 pr_warn("Unexpected SAUM result %d\n",
6956 result);
6957
6958 /*
6959 * In software mute mode, the standard codec controls take
6960 * precendence, so we unmute the ThinkPad HW switch at
6961 * startup. Just on case there are SAUM-capable ThinkPads
6962 * with level controls, set max HW volume as well.
6963 */
6964 if (tp_features.mixer_no_level_control)
6965 result = volume_set_mute(false);
6966 else
6967 result = volume_set_status(TP_EC_VOLUME_MAX);
6968
6969 if (result != 0)
6970 pr_warn("Failed to unmute the HW mute switch\n");
6971
6972 return 0;
6973 }
6974
6975 static void volume_exit_software_mute(void)
6976 {
6977 int r;
6978
6979 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
6980 || r != software_mute_orig_mode)
6981 pr_warn("Failed to restore mute mode\n");
6982 }
6983
6984 static int volume_alsa_set_volume(const u8 vol)
6985 {
6986 dbg_printk(TPACPI_DBG_MIXER,
6987 "ALSA: trying to set volume level to %hu\n", vol);
6988 return __volume_set_volume_ec(vol);
6989 }
6990
6991 static void volume_alsa_notify_change(void)
6992 {
6993 struct tpacpi_alsa_data *d;
6994
6995 if (alsa_card && alsa_card->private_data) {
6996 d = alsa_card->private_data;
6997 if (d->ctl_mute_id)
6998 snd_ctl_notify(alsa_card,
6999 SNDRV_CTL_EVENT_MASK_VALUE,
7000 d->ctl_mute_id);
7001 if (d->ctl_vol_id)
7002 snd_ctl_notify(alsa_card,
7003 SNDRV_CTL_EVENT_MASK_VALUE,
7004 d->ctl_vol_id);
7005 }
7006 }
7007
7008 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7009 struct snd_ctl_elem_info *uinfo)
7010 {
7011 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7012 uinfo->count = 1;
7013 uinfo->value.integer.min = 0;
7014 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7015 return 0;
7016 }
7017
7018 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7019 struct snd_ctl_elem_value *ucontrol)
7020 {
7021 u8 s;
7022 int rc;
7023
7024 rc = volume_get_status(&s);
7025 if (rc < 0)
7026 return rc;
7027
7028 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7029 return 0;
7030 }
7031
7032 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7033 struct snd_ctl_elem_value *ucontrol)
7034 {
7035 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7036 ucontrol->value.integer.value[0]);
7037 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7038 }
7039
7040 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7041
7042 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7043 struct snd_ctl_elem_value *ucontrol)
7044 {
7045 u8 s;
7046 int rc;
7047
7048 rc = volume_get_status(&s);
7049 if (rc < 0)
7050 return rc;
7051
7052 ucontrol->value.integer.value[0] =
7053 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7054 return 0;
7055 }
7056
7057 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7058 struct snd_ctl_elem_value *ucontrol)
7059 {
7060 tpacpi_disclose_usertask("ALSA", "%smute\n",
7061 ucontrol->value.integer.value[0] ?
7062 "un" : "");
7063 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7064 }
7065
7066 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7067 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7068 .name = "Console Playback Volume",
7069 .index = 0,
7070 .access = SNDRV_CTL_ELEM_ACCESS_READ,
7071 .info = volume_alsa_vol_info,
7072 .get = volume_alsa_vol_get,
7073 };
7074
7075 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7076 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7077 .name = "Console Playback Switch",
7078 .index = 0,
7079 .access = SNDRV_CTL_ELEM_ACCESS_READ,
7080 .info = volume_alsa_mute_info,
7081 .get = volume_alsa_mute_get,
7082 };
7083
7084 static void volume_suspend(void)
7085 {
7086 tpacpi_volume_checkpoint_nvram();
7087 }
7088
7089 static void volume_resume(void)
7090 {
7091 if (software_mute_active) {
7092 if (volume_set_software_mute(false) < 0)
7093 pr_warn("Failed to restore software mute\n");
7094 } else {
7095 volume_alsa_notify_change();
7096 }
7097 }
7098
7099 static void volume_shutdown(void)
7100 {
7101 tpacpi_volume_checkpoint_nvram();
7102 }
7103
7104 static void volume_exit(void)
7105 {
7106 if (alsa_card) {
7107 snd_card_free(alsa_card);
7108 alsa_card = NULL;
7109 }
7110
7111 tpacpi_volume_checkpoint_nvram();
7112
7113 if (software_mute_active)
7114 volume_exit_software_mute();
7115 }
7116
7117 static int __init volume_create_alsa_mixer(void)
7118 {
7119 struct snd_card *card;
7120 struct tpacpi_alsa_data *data;
7121 struct snd_kcontrol *ctl_vol;
7122 struct snd_kcontrol *ctl_mute;
7123 int rc;
7124
7125 rc = snd_card_new(&tpacpi_pdev->dev,
7126 alsa_index, alsa_id, THIS_MODULE,
7127 sizeof(struct tpacpi_alsa_data), &card);
7128 if (rc < 0 || !card) {
7129 pr_err("Failed to create ALSA card structures: %d\n", rc);
7130 return 1;
7131 }
7132
7133 BUG_ON(!card->private_data);
7134 data = card->private_data;
7135 data->card = card;
7136
7137 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
7138 sizeof(card->driver));
7139 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7140 sizeof(card->shortname));
7141 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7142 (thinkpad_id.ec_version_str) ?
7143 thinkpad_id.ec_version_str : "(unknown)");
7144 snprintf(card->longname, sizeof(card->longname),
7145 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7146 (thinkpad_id.ec_version_str) ?
7147 thinkpad_id.ec_version_str : "unknown");
7148
7149 if (volume_control_allowed) {
7150 volume_alsa_control_vol.put = volume_alsa_vol_put;
7151 volume_alsa_control_vol.access =
7152 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7153
7154 volume_alsa_control_mute.put = volume_alsa_mute_put;
7155 volume_alsa_control_mute.access =
7156 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7157 }
7158
7159 if (!tp_features.mixer_no_level_control) {
7160 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7161 rc = snd_ctl_add(card, ctl_vol);
7162 if (rc < 0) {
7163 pr_err("Failed to create ALSA volume control: %d\n",
7164 rc);
7165 goto err_exit;
7166 }
7167 data->ctl_vol_id = &ctl_vol->id;
7168 }
7169
7170 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7171 rc = snd_ctl_add(card, ctl_mute);
7172 if (rc < 0) {
7173 pr_err("Failed to create ALSA mute control: %d\n", rc);
7174 goto err_exit;
7175 }
7176 data->ctl_mute_id = &ctl_mute->id;
7177
7178 rc = snd_card_register(card);
7179 if (rc < 0) {
7180 pr_err("Failed to register ALSA card: %d\n", rc);
7181 goto err_exit;
7182 }
7183
7184 alsa_card = card;
7185 return 0;
7186
7187 err_exit:
7188 snd_card_free(card);
7189 return 1;
7190 }
7191
7192 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
7193 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
7194
7195 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7196 /* Whitelist volume level on all IBM by default */
7197 { .vendor = PCI_VENDOR_ID_IBM,
7198 .bios = TPACPI_MATCH_ANY,
7199 .ec = TPACPI_MATCH_ANY,
7200 .quirks = TPACPI_VOL_Q_LEVEL },
7201
7202 /* Lenovo models with volume control (needs confirmation) */
7203 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7204 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7205 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7206 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7207 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7208 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7209 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7210
7211 /* Whitelist mute-only on all Lenovo by default */
7212 { .vendor = PCI_VENDOR_ID_LENOVO,
7213 .bios = TPACPI_MATCH_ANY,
7214 .ec = TPACPI_MATCH_ANY,
7215 .quirks = TPACPI_VOL_Q_MUTEONLY }
7216 };
7217
7218 static int __init volume_init(struct ibm_init_struct *iibm)
7219 {
7220 unsigned long quirks;
7221 int rc;
7222
7223 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7224
7225 mutex_init(&volume_mutex);
7226
7227 /*
7228 * Check for module parameter bogosity, note that we
7229 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7230 * able to detect "unspecified"
7231 */
7232 if (volume_mode > TPACPI_VOL_MODE_MAX)
7233 return -EINVAL;
7234
7235 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7236 pr_err("UCMS step volume mode not implemented, "
7237 "please contact %s\n", TPACPI_MAIL);
7238 return 1;
7239 }
7240
7241 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7242 return -EINVAL;
7243
7244 /*
7245 * The ALSA mixer is our primary interface.
7246 * When disabled, don't install the subdriver at all
7247 */
7248 if (!alsa_enable) {
7249 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7250 "ALSA mixer disabled by parameter, "
7251 "not loading volume subdriver...\n");
7252 return 1;
7253 }
7254
7255 quirks = tpacpi_check_quirks(volume_quirk_table,
7256 ARRAY_SIZE(volume_quirk_table));
7257
7258 switch (volume_capabilities) {
7259 case TPACPI_VOL_CAP_AUTO:
7260 if (quirks & TPACPI_VOL_Q_MUTEONLY)
7261 tp_features.mixer_no_level_control = 1;
7262 else if (quirks & TPACPI_VOL_Q_LEVEL)
7263 tp_features.mixer_no_level_control = 0;
7264 else
7265 return 1; /* no mixer */
7266 break;
7267 case TPACPI_VOL_CAP_VOLMUTE:
7268 tp_features.mixer_no_level_control = 0;
7269 break;
7270 case TPACPI_VOL_CAP_MUTEONLY:
7271 tp_features.mixer_no_level_control = 1;
7272 break;
7273 default:
7274 return 1;
7275 }
7276
7277 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7278 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7279 "using user-supplied volume_capabilities=%d\n",
7280 volume_capabilities);
7281
7282 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7283 volume_mode == TPACPI_VOL_MODE_MAX) {
7284 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7285
7286 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7287 "driver auto-selected volume_mode=%d\n",
7288 volume_mode);
7289 } else {
7290 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7291 "using user-supplied volume_mode=%d\n",
7292 volume_mode);
7293 }
7294
7295 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7296 "mute is supported, volume control is %s\n",
7297 str_supported(!tp_features.mixer_no_level_control));
7298
7299 if (software_mute_requested && volume_set_software_mute(true) == 0) {
7300 software_mute_active = true;
7301 } else {
7302 rc = volume_create_alsa_mixer();
7303 if (rc) {
7304 pr_err("Could not create the ALSA mixer interface\n");
7305 return rc;
7306 }
7307
7308 pr_info("Console audio control enabled, mode: %s\n",
7309 (volume_control_allowed) ?
7310 "override (read/write)" :
7311 "monitor (read only)");
7312 }
7313
7314 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7315 "registering volume hotkeys as change notification\n");
7316 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7317 | TP_ACPI_HKEY_VOLUP_MASK
7318 | TP_ACPI_HKEY_VOLDWN_MASK
7319 | TP_ACPI_HKEY_MUTE_MASK);
7320
7321 return 0;
7322 }
7323
7324 static int volume_read(struct seq_file *m)
7325 {
7326 u8 status;
7327
7328 if (volume_get_status(&status) < 0) {
7329 seq_printf(m, "level:\t\tunreadable\n");
7330 } else {
7331 if (tp_features.mixer_no_level_control)
7332 seq_printf(m, "level:\t\tunsupported\n");
7333 else
7334 seq_printf(m, "level:\t\t%d\n",
7335 status & TP_EC_AUDIO_LVL_MSK);
7336
7337 seq_printf(m, "mute:\t\t%s\n",
7338 onoff(status, TP_EC_AUDIO_MUTESW));
7339
7340 if (volume_control_allowed) {
7341 seq_printf(m, "commands:\tunmute, mute\n");
7342 if (!tp_features.mixer_no_level_control) {
7343 seq_printf(m,
7344 "commands:\tup, down\n");
7345 seq_printf(m,
7346 "commands:\tlevel <level>"
7347 " (<level> is 0-%d)\n",
7348 TP_EC_VOLUME_MAX);
7349 }
7350 }
7351 }
7352
7353 return 0;
7354 }
7355
7356 static int volume_write(char *buf)
7357 {
7358 u8 s;
7359 u8 new_level, new_mute;
7360 int l;
7361 char *cmd;
7362 int rc;
7363
7364 /*
7365 * We do allow volume control at driver startup, so that the
7366 * user can set initial state through the volume=... parameter hack.
7367 */
7368 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7369 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7370 tp_warned.volume_ctrl_forbidden = 1;
7371 pr_notice("Console audio control in monitor mode, "
7372 "changes are not allowed\n");
7373 pr_notice("Use the volume_control=1 module parameter "
7374 "to enable volume control\n");
7375 }
7376 return -EPERM;
7377 }
7378
7379 rc = volume_get_status(&s);
7380 if (rc < 0)
7381 return rc;
7382
7383 new_level = s & TP_EC_AUDIO_LVL_MSK;
7384 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7385
7386 while ((cmd = next_cmd(&buf))) {
7387 if (!tp_features.mixer_no_level_control) {
7388 if (strlencmp(cmd, "up") == 0) {
7389 if (new_mute)
7390 new_mute = 0;
7391 else if (new_level < TP_EC_VOLUME_MAX)
7392 new_level++;
7393 continue;
7394 } else if (strlencmp(cmd, "down") == 0) {
7395 if (new_mute)
7396 new_mute = 0;
7397 else if (new_level > 0)
7398 new_level--;
7399 continue;
7400 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7401 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7402 new_level = l;
7403 continue;
7404 }
7405 }
7406 if (strlencmp(cmd, "mute") == 0)
7407 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7408 else if (strlencmp(cmd, "unmute") == 0)
7409 new_mute = 0;
7410 else
7411 return -EINVAL;
7412 }
7413
7414 if (tp_features.mixer_no_level_control) {
7415 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7416 new_mute ? "" : "un");
7417 rc = volume_set_mute(!!new_mute);
7418 } else {
7419 tpacpi_disclose_usertask("procfs volume",
7420 "%smute and set level to %d\n",
7421 new_mute ? "" : "un", new_level);
7422 rc = volume_set_status(new_mute | new_level);
7423 }
7424 volume_alsa_notify_change();
7425
7426 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7427 }
7428
7429 static struct ibm_struct volume_driver_data = {
7430 .name = "volume",
7431 .read = volume_read,
7432 .write = volume_write,
7433 .exit = volume_exit,
7434 .suspend = volume_suspend,
7435 .resume = volume_resume,
7436 .shutdown = volume_shutdown,
7437 };
7438
7439 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7440
7441 #define alsa_card NULL
7442
7443 static void inline volume_alsa_notify_change(void)
7444 {
7445 }
7446
7447 static int __init volume_init(struct ibm_init_struct *iibm)
7448 {
7449 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7450
7451 return 1;
7452 }
7453
7454 static struct ibm_struct volume_driver_data = {
7455 .name = "volume",
7456 };
7457
7458 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7459
7460 /*************************************************************************
7461 * Fan subdriver
7462 */
7463
7464 /*
7465 * FAN ACCESS MODES
7466 *
7467 * TPACPI_FAN_RD_ACPI_GFAN:
7468 * ACPI GFAN method: returns fan level
7469 *
7470 * see TPACPI_FAN_WR_ACPI_SFAN
7471 * EC 0x2f (HFSP) not available if GFAN exists
7472 *
7473 * TPACPI_FAN_WR_ACPI_SFAN:
7474 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7475 *
7476 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7477 * it for writing.
7478 *
7479 * TPACPI_FAN_WR_TPEC:
7480 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7481 * Supported on almost all ThinkPads
7482 *
7483 * Fan speed changes of any sort (including those caused by the
7484 * disengaged mode) are usually done slowly by the firmware as the
7485 * maximum amount of fan duty cycle change per second seems to be
7486 * limited.
7487 *
7488 * Reading is not available if GFAN exists.
7489 * Writing is not available if SFAN exists.
7490 *
7491 * Bits
7492 * 7 automatic mode engaged;
7493 * (default operation mode of the ThinkPad)
7494 * fan level is ignored in this mode.
7495 * 6 full speed mode (takes precedence over bit 7);
7496 * not available on all thinkpads. May disable
7497 * the tachometer while the fan controller ramps up
7498 * the speed (which can take up to a few *minutes*).
7499 * Speeds up fan to 100% duty-cycle, which is far above
7500 * the standard RPM levels. It is not impossible that
7501 * it could cause hardware damage.
7502 * 5-3 unused in some models. Extra bits for fan level
7503 * in others, but still useless as all values above
7504 * 7 map to the same speed as level 7 in these models.
7505 * 2-0 fan level (0..7 usually)
7506 * 0x00 = stop
7507 * 0x07 = max (set when temperatures critical)
7508 * Some ThinkPads may have other levels, see
7509 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7510 *
7511 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7512 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7513 * does so, its initial value is meaningless (0x07).
7514 *
7515 * For firmware bugs, refer to:
7516 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7517 *
7518 * ----
7519 *
7520 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7521 * Main fan tachometer reading (in RPM)
7522 *
7523 * This register is present on all ThinkPads with a new-style EC, and
7524 * it is known not to be present on the A21m/e, and T22, as there is
7525 * something else in offset 0x84 according to the ACPI DSDT. Other
7526 * ThinkPads from this same time period (and earlier) probably lack the
7527 * tachometer as well.
7528 *
7529 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7530 * was never fixed by IBM to report the EC firmware version string
7531 * probably support the tachometer (like the early X models), so
7532 * detecting it is quite hard. We need more data to know for sure.
7533 *
7534 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7535 * might result.
7536 *
7537 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7538 * mode.
7539 *
7540 * For firmware bugs, refer to:
7541 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7542 *
7543 * ----
7544 *
7545 * ThinkPad EC register 0x31 bit 0 (only on select models)
7546 *
7547 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7548 * show the speed of the main fan. When bit 0 of EC register 0x31
7549 * is one, the tachometer registers show the speed of the auxiliary
7550 * fan.
7551 *
7552 * Fan control seems to affect both fans, regardless of the state
7553 * of this bit.
7554 *
7555 * So far, only the firmware for the X60/X61 non-tablet versions
7556 * seem to support this (firmware TP-7M).
7557 *
7558 * TPACPI_FAN_WR_ACPI_FANS:
7559 * ThinkPad X31, X40, X41. Not available in the X60.
7560 *
7561 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7562 * high speed. ACPI DSDT seems to map these three speeds to levels
7563 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7564 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7565 *
7566 * The speeds are stored on handles
7567 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7568 *
7569 * There are three default speed sets, accessible as handles:
7570 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7571 *
7572 * ACPI DSDT switches which set is in use depending on various
7573 * factors.
7574 *
7575 * TPACPI_FAN_WR_TPEC is also available and should be used to
7576 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7577 * but the ACPI tables just mention level 7.
7578 */
7579
7580 enum { /* Fan control constants */
7581 fan_status_offset = 0x2f, /* EC register 0x2f */
7582 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7583 * 0x84 must be read before 0x85 */
7584 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7585 bit 0 selects which fan is active */
7586
7587 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7588 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7589
7590 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7591 };
7592
7593 enum fan_status_access_mode {
7594 TPACPI_FAN_NONE = 0, /* No fan status or control */
7595 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7596 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7597 };
7598
7599 enum fan_control_access_mode {
7600 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7601 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7602 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7603 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7604 };
7605
7606 enum fan_control_commands {
7607 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7608 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7609 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7610 * and also watchdog cmd */
7611 };
7612
7613 static bool fan_control_allowed;
7614
7615 static enum fan_status_access_mode fan_status_access_mode;
7616 static enum fan_control_access_mode fan_control_access_mode;
7617 static enum fan_control_commands fan_control_commands;
7618
7619 static u8 fan_control_initial_status;
7620 static u8 fan_control_desired_level;
7621 static u8 fan_control_resume_level;
7622 static int fan_watchdog_maxinterval;
7623
7624 static struct mutex fan_mutex;
7625
7626 static void fan_watchdog_fire(struct work_struct *ignored);
7627 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7628
7629 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7630 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7631 "\\FSPD", /* 600e/x, 770e, 770x */
7632 ); /* all others */
7633 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7634 "JFNS", /* 770x-JL */
7635 ); /* all others */
7636
7637 /*
7638 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7639 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7640 * be in auto mode (0x80).
7641 *
7642 * This is corrected by any write to HFSP either by the driver, or
7643 * by the firmware.
7644 *
7645 * We assume 0x07 really means auto mode while this quirk is active,
7646 * as this is far more likely than the ThinkPad being in level 7,
7647 * which is only used by the firmware during thermal emergencies.
7648 *
7649 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7650 * TP-70 (T43, R52), which are known to be buggy.
7651 */
7652
7653 static void fan_quirk1_setup(void)
7654 {
7655 if (fan_control_initial_status == 0x07) {
7656 pr_notice("fan_init: initial fan status is unknown, "
7657 "assuming it is in auto mode\n");
7658 tp_features.fan_ctrl_status_undef = 1;
7659 }
7660 }
7661
7662 static void fan_quirk1_handle(u8 *fan_status)
7663 {
7664 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7665 if (*fan_status != fan_control_initial_status) {
7666 /* something changed the HFSP regisnter since
7667 * driver init time, so it is not undefined
7668 * anymore */
7669 tp_features.fan_ctrl_status_undef = 0;
7670 } else {
7671 /* Return most likely status. In fact, it
7672 * might be the only possible status */
7673 *fan_status = TP_EC_FAN_AUTO;
7674 }
7675 }
7676 }
7677
7678 /* Select main fan on X60/X61, NOOP on others */
7679 static bool fan_select_fan1(void)
7680 {
7681 if (tp_features.second_fan) {
7682 u8 val;
7683
7684 if (ec_read(fan_select_offset, &val) < 0)
7685 return false;
7686 val &= 0xFEU;
7687 if (ec_write(fan_select_offset, val) < 0)
7688 return false;
7689 }
7690 return true;
7691 }
7692
7693 /* Select secondary fan on X60/X61 */
7694 static bool fan_select_fan2(void)
7695 {
7696 u8 val;
7697
7698 if (!tp_features.second_fan)
7699 return false;
7700
7701 if (ec_read(fan_select_offset, &val) < 0)
7702 return false;
7703 val |= 0x01U;
7704 if (ec_write(fan_select_offset, val) < 0)
7705 return false;
7706
7707 return true;
7708 }
7709
7710 /*
7711 * Call with fan_mutex held
7712 */
7713 static void fan_update_desired_level(u8 status)
7714 {
7715 if ((status &
7716 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7717 if (status > 7)
7718 fan_control_desired_level = 7;
7719 else
7720 fan_control_desired_level = status;
7721 }
7722 }
7723
7724 static int fan_get_status(u8 *status)
7725 {
7726 u8 s;
7727
7728 /* TODO:
7729 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7730
7731 switch (fan_status_access_mode) {
7732 case TPACPI_FAN_RD_ACPI_GFAN: {
7733 /* 570, 600e/x, 770e, 770x */
7734 int res;
7735
7736 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
7737 return -EIO;
7738
7739 if (likely(status))
7740 *status = res & 0x07;
7741
7742 break;
7743 }
7744 case TPACPI_FAN_RD_TPEC:
7745 /* all except 570, 600e/x, 770e, 770x */
7746 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7747 return -EIO;
7748
7749 if (likely(status)) {
7750 *status = s;
7751 fan_quirk1_handle(status);
7752 }
7753
7754 break;
7755
7756 default:
7757 return -ENXIO;
7758 }
7759
7760 return 0;
7761 }
7762
7763 static int fan_get_status_safe(u8 *status)
7764 {
7765 int rc;
7766 u8 s;
7767
7768 if (mutex_lock_killable(&fan_mutex))
7769 return -ERESTARTSYS;
7770 rc = fan_get_status(&s);
7771 if (!rc)
7772 fan_update_desired_level(s);
7773 mutex_unlock(&fan_mutex);
7774
7775 if (status)
7776 *status = s;
7777
7778 return rc;
7779 }
7780
7781 static int fan_get_speed(unsigned int *speed)
7782 {
7783 u8 hi, lo;
7784
7785 switch (fan_status_access_mode) {
7786 case TPACPI_FAN_RD_TPEC:
7787 /* all except 570, 600e/x, 770e, 770x */
7788 if (unlikely(!fan_select_fan1()))
7789 return -EIO;
7790 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7791 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7792 return -EIO;
7793
7794 if (likely(speed))
7795 *speed = (hi << 8) | lo;
7796
7797 break;
7798
7799 default:
7800 return -ENXIO;
7801 }
7802
7803 return 0;
7804 }
7805
7806 static int fan2_get_speed(unsigned int *speed)
7807 {
7808 u8 hi, lo;
7809 bool rc;
7810
7811 switch (fan_status_access_mode) {
7812 case TPACPI_FAN_RD_TPEC:
7813 /* all except 570, 600e/x, 770e, 770x */
7814 if (unlikely(!fan_select_fan2()))
7815 return -EIO;
7816 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7817 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7818 fan_select_fan1(); /* play it safe */
7819 if (rc)
7820 return -EIO;
7821
7822 if (likely(speed))
7823 *speed = (hi << 8) | lo;
7824
7825 break;
7826
7827 default:
7828 return -ENXIO;
7829 }
7830
7831 return 0;
7832 }
7833
7834 static int fan_set_level(int level)
7835 {
7836 if (!fan_control_allowed)
7837 return -EPERM;
7838
7839 switch (fan_control_access_mode) {
7840 case TPACPI_FAN_WR_ACPI_SFAN:
7841 if (level >= 0 && level <= 7) {
7842 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7843 return -EIO;
7844 } else
7845 return -EINVAL;
7846 break;
7847
7848 case TPACPI_FAN_WR_ACPI_FANS:
7849 case TPACPI_FAN_WR_TPEC:
7850 if (!(level & TP_EC_FAN_AUTO) &&
7851 !(level & TP_EC_FAN_FULLSPEED) &&
7852 ((level < 0) || (level > 7)))
7853 return -EINVAL;
7854
7855 /* safety net should the EC not support AUTO
7856 * or FULLSPEED mode bits and just ignore them */
7857 if (level & TP_EC_FAN_FULLSPEED)
7858 level |= 7; /* safety min speed 7 */
7859 else if (level & TP_EC_FAN_AUTO)
7860 level |= 4; /* safety min speed 4 */
7861
7862 if (!acpi_ec_write(fan_status_offset, level))
7863 return -EIO;
7864 else
7865 tp_features.fan_ctrl_status_undef = 0;
7866 break;
7867
7868 default:
7869 return -ENXIO;
7870 }
7871
7872 vdbg_printk(TPACPI_DBG_FAN,
7873 "fan control: set fan control register to 0x%02x\n", level);
7874 return 0;
7875 }
7876
7877 static int fan_set_level_safe(int level)
7878 {
7879 int rc;
7880
7881 if (!fan_control_allowed)
7882 return -EPERM;
7883
7884 if (mutex_lock_killable(&fan_mutex))
7885 return -ERESTARTSYS;
7886
7887 if (level == TPACPI_FAN_LAST_LEVEL)
7888 level = fan_control_desired_level;
7889
7890 rc = fan_set_level(level);
7891 if (!rc)
7892 fan_update_desired_level(level);
7893
7894 mutex_unlock(&fan_mutex);
7895 return rc;
7896 }
7897
7898 static int fan_set_enable(void)
7899 {
7900 u8 s;
7901 int rc;
7902
7903 if (!fan_control_allowed)
7904 return -EPERM;
7905
7906 if (mutex_lock_killable(&fan_mutex))
7907 return -ERESTARTSYS;
7908
7909 switch (fan_control_access_mode) {
7910 case TPACPI_FAN_WR_ACPI_FANS:
7911 case TPACPI_FAN_WR_TPEC:
7912 rc = fan_get_status(&s);
7913 if (rc < 0)
7914 break;
7915
7916 /* Don't go out of emergency fan mode */
7917 if (s != 7) {
7918 s &= 0x07;
7919 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7920 }
7921
7922 if (!acpi_ec_write(fan_status_offset, s))
7923 rc = -EIO;
7924 else {
7925 tp_features.fan_ctrl_status_undef = 0;
7926 rc = 0;
7927 }
7928 break;
7929
7930 case TPACPI_FAN_WR_ACPI_SFAN:
7931 rc = fan_get_status(&s);
7932 if (rc < 0)
7933 break;
7934
7935 s &= 0x07;
7936
7937 /* Set fan to at least level 4 */
7938 s |= 4;
7939
7940 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7941 rc = -EIO;
7942 else
7943 rc = 0;
7944 break;
7945
7946 default:
7947 rc = -ENXIO;
7948 }
7949
7950 mutex_unlock(&fan_mutex);
7951
7952 if (!rc)
7953 vdbg_printk(TPACPI_DBG_FAN,
7954 "fan control: set fan control register to 0x%02x\n",
7955 s);
7956 return rc;
7957 }
7958
7959 static int fan_set_disable(void)
7960 {
7961 int rc;
7962
7963 if (!fan_control_allowed)
7964 return -EPERM;
7965
7966 if (mutex_lock_killable(&fan_mutex))
7967 return -ERESTARTSYS;
7968
7969 rc = 0;
7970 switch (fan_control_access_mode) {
7971 case TPACPI_FAN_WR_ACPI_FANS:
7972 case TPACPI_FAN_WR_TPEC:
7973 if (!acpi_ec_write(fan_status_offset, 0x00))
7974 rc = -EIO;
7975 else {
7976 fan_control_desired_level = 0;
7977 tp_features.fan_ctrl_status_undef = 0;
7978 }
7979 break;
7980
7981 case TPACPI_FAN_WR_ACPI_SFAN:
7982 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7983 rc = -EIO;
7984 else
7985 fan_control_desired_level = 0;
7986 break;
7987
7988 default:
7989 rc = -ENXIO;
7990 }
7991
7992 if (!rc)
7993 vdbg_printk(TPACPI_DBG_FAN,
7994 "fan control: set fan control register to 0\n");
7995
7996 mutex_unlock(&fan_mutex);
7997 return rc;
7998 }
7999
8000 static int fan_set_speed(int speed)
8001 {
8002 int rc;
8003
8004 if (!fan_control_allowed)
8005 return -EPERM;
8006
8007 if (mutex_lock_killable(&fan_mutex))
8008 return -ERESTARTSYS;
8009
8010 rc = 0;
8011 switch (fan_control_access_mode) {
8012 case TPACPI_FAN_WR_ACPI_FANS:
8013 if (speed >= 0 && speed <= 65535) {
8014 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8015 speed, speed, speed))
8016 rc = -EIO;
8017 } else
8018 rc = -EINVAL;
8019 break;
8020
8021 default:
8022 rc = -ENXIO;
8023 }
8024
8025 mutex_unlock(&fan_mutex);
8026 return rc;
8027 }
8028
8029 static void fan_watchdog_reset(void)
8030 {
8031 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8032 return;
8033
8034 if (fan_watchdog_maxinterval > 0 &&
8035 tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8036 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8037 msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8038 else
8039 cancel_delayed_work(&fan_watchdog_task);
8040 }
8041
8042 static void fan_watchdog_fire(struct work_struct *ignored)
8043 {
8044 int rc;
8045
8046 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8047 return;
8048
8049 pr_notice("fan watchdog: enabling fan\n");
8050 rc = fan_set_enable();
8051 if (rc < 0) {
8052 pr_err("fan watchdog: error %d while enabling fan, "
8053 "will try again later...\n", -rc);
8054 /* reschedule for later */
8055 fan_watchdog_reset();
8056 }
8057 }
8058
8059 /*
8060 * SYSFS fan layout: hwmon compatible (device)
8061 *
8062 * pwm*_enable:
8063 * 0: "disengaged" mode
8064 * 1: manual mode
8065 * 2: native EC "auto" mode (recommended, hardware default)
8066 *
8067 * pwm*: set speed in manual mode, ignored otherwise.
8068 * 0 is level 0; 255 is level 7. Intermediate points done with linear
8069 * interpolation.
8070 *
8071 * fan*_input: tachometer reading, RPM
8072 *
8073 *
8074 * SYSFS fan layout: extensions
8075 *
8076 * fan_watchdog (driver):
8077 * fan watchdog interval in seconds, 0 disables (default), max 120
8078 */
8079
8080 /* sysfs fan pwm1_enable ----------------------------------------------- */
8081 static ssize_t fan_pwm1_enable_show(struct device *dev,
8082 struct device_attribute *attr,
8083 char *buf)
8084 {
8085 int res, mode;
8086 u8 status;
8087
8088 res = fan_get_status_safe(&status);
8089 if (res)
8090 return res;
8091
8092 if (status & TP_EC_FAN_FULLSPEED) {
8093 mode = 0;
8094 } else if (status & TP_EC_FAN_AUTO) {
8095 mode = 2;
8096 } else
8097 mode = 1;
8098
8099 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
8100 }
8101
8102 static ssize_t fan_pwm1_enable_store(struct device *dev,
8103 struct device_attribute *attr,
8104 const char *buf, size_t count)
8105 {
8106 unsigned long t;
8107 int res, level;
8108
8109 if (parse_strtoul(buf, 2, &t))
8110 return -EINVAL;
8111
8112 tpacpi_disclose_usertask("hwmon pwm1_enable",
8113 "set fan mode to %lu\n", t);
8114
8115 switch (t) {
8116 case 0:
8117 level = TP_EC_FAN_FULLSPEED;
8118 break;
8119 case 1:
8120 level = TPACPI_FAN_LAST_LEVEL;
8121 break;
8122 case 2:
8123 level = TP_EC_FAN_AUTO;
8124 break;
8125 case 3:
8126 /* reserved for software-controlled auto mode */
8127 return -ENOSYS;
8128 default:
8129 return -EINVAL;
8130 }
8131
8132 res = fan_set_level_safe(level);
8133 if (res == -ENXIO)
8134 return -EINVAL;
8135 else if (res < 0)
8136 return res;
8137
8138 fan_watchdog_reset();
8139
8140 return count;
8141 }
8142
8143 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8144 fan_pwm1_enable_show, fan_pwm1_enable_store);
8145
8146 /* sysfs fan pwm1 ------------------------------------------------------ */
8147 static ssize_t fan_pwm1_show(struct device *dev,
8148 struct device_attribute *attr,
8149 char *buf)
8150 {
8151 int res;
8152 u8 status;
8153
8154 res = fan_get_status_safe(&status);
8155 if (res)
8156 return res;
8157
8158 if ((status &
8159 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8160 status = fan_control_desired_level;
8161
8162 if (status > 7)
8163 status = 7;
8164
8165 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
8166 }
8167
8168 static ssize_t fan_pwm1_store(struct device *dev,
8169 struct device_attribute *attr,
8170 const char *buf, size_t count)
8171 {
8172 unsigned long s;
8173 int rc;
8174 u8 status, newlevel;
8175
8176 if (parse_strtoul(buf, 255, &s))
8177 return -EINVAL;
8178
8179 tpacpi_disclose_usertask("hwmon pwm1",
8180 "set fan speed to %lu\n", s);
8181
8182 /* scale down from 0-255 to 0-7 */
8183 newlevel = (s >> 5) & 0x07;
8184
8185 if (mutex_lock_killable(&fan_mutex))
8186 return -ERESTARTSYS;
8187
8188 rc = fan_get_status(&status);
8189 if (!rc && (status &
8190 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8191 rc = fan_set_level(newlevel);
8192 if (rc == -ENXIO)
8193 rc = -EINVAL;
8194 else if (!rc) {
8195 fan_update_desired_level(newlevel);
8196 fan_watchdog_reset();
8197 }
8198 }
8199
8200 mutex_unlock(&fan_mutex);
8201 return (rc) ? rc : count;
8202 }
8203
8204 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8205
8206 /* sysfs fan fan1_input ------------------------------------------------ */
8207 static ssize_t fan_fan1_input_show(struct device *dev,
8208 struct device_attribute *attr,
8209 char *buf)
8210 {
8211 int res;
8212 unsigned int speed;
8213
8214 res = fan_get_speed(&speed);
8215 if (res < 0)
8216 return res;
8217
8218 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8219 }
8220
8221 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8222
8223 /* sysfs fan fan2_input ------------------------------------------------ */
8224 static ssize_t fan_fan2_input_show(struct device *dev,
8225 struct device_attribute *attr,
8226 char *buf)
8227 {
8228 int res;
8229 unsigned int speed;
8230
8231 res = fan2_get_speed(&speed);
8232 if (res < 0)
8233 return res;
8234
8235 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8236 }
8237
8238 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8239
8240 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
8241 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
8242 char *buf)
8243 {
8244 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
8245 }
8246
8247 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
8248 const char *buf, size_t count)
8249 {
8250 unsigned long t;
8251
8252 if (parse_strtoul(buf, 120, &t))
8253 return -EINVAL;
8254
8255 if (!fan_control_allowed)
8256 return -EPERM;
8257
8258 fan_watchdog_maxinterval = t;
8259 fan_watchdog_reset();
8260
8261 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8262
8263 return count;
8264 }
8265
8266 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
8267 fan_fan_watchdog_show, fan_fan_watchdog_store);
8268
8269 /* --------------------------------------------------------------------- */
8270 static struct attribute *fan_attributes[] = {
8271 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr,
8272 &dev_attr_fan1_input.attr,
8273 NULL, /* for fan2_input */
8274 NULL
8275 };
8276
8277 static const struct attribute_group fan_attr_group = {
8278 .attrs = fan_attributes,
8279 };
8280
8281 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
8282 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
8283
8284 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
8285 { .vendor = PCI_VENDOR_ID_IBM, \
8286 .bios = TPACPI_MATCH_ANY, \
8287 .ec = TPID(__id1, __id2), \
8288 .quirks = __quirks }
8289
8290 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
8291 { .vendor = PCI_VENDOR_ID_LENOVO, \
8292 .bios = TPACPI_MATCH_ANY, \
8293 .ec = TPID(__id1, __id2), \
8294 .quirks = __quirks }
8295
8296 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8297 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
8298 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
8299 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
8300 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
8301 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
8302 };
8303
8304 #undef TPACPI_FAN_QL
8305 #undef TPACPI_FAN_QI
8306
8307 static int __init fan_init(struct ibm_init_struct *iibm)
8308 {
8309 int rc;
8310 unsigned long quirks;
8311
8312 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8313 "initializing fan subdriver\n");
8314
8315 mutex_init(&fan_mutex);
8316 fan_status_access_mode = TPACPI_FAN_NONE;
8317 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8318 fan_control_commands = 0;
8319 fan_watchdog_maxinterval = 0;
8320 tp_features.fan_ctrl_status_undef = 0;
8321 tp_features.second_fan = 0;
8322 fan_control_desired_level = 7;
8323
8324 if (tpacpi_is_ibm()) {
8325 TPACPI_ACPIHANDLE_INIT(fans);
8326 TPACPI_ACPIHANDLE_INIT(gfan);
8327 TPACPI_ACPIHANDLE_INIT(sfan);
8328 }
8329
8330 quirks = tpacpi_check_quirks(fan_quirk_table,
8331 ARRAY_SIZE(fan_quirk_table));
8332
8333 if (gfan_handle) {
8334 /* 570, 600e/x, 770e, 770x */
8335 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8336 } else {
8337 /* all other ThinkPads: note that even old-style
8338 * ThinkPad ECs supports the fan control register */
8339 if (likely(acpi_ec_read(fan_status_offset,
8340 &fan_control_initial_status))) {
8341 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8342 if (quirks & TPACPI_FAN_Q1)
8343 fan_quirk1_setup();
8344 if (quirks & TPACPI_FAN_2FAN) {
8345 tp_features.second_fan = 1;
8346 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8347 "secondary fan support enabled\n");
8348 }
8349 } else {
8350 pr_err("ThinkPad ACPI EC access misbehaving, "
8351 "fan status and control unavailable\n");
8352 return 1;
8353 }
8354 }
8355
8356 if (sfan_handle) {
8357 /* 570, 770x-JL */
8358 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8359 fan_control_commands |=
8360 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8361 } else {
8362 if (!gfan_handle) {
8363 /* gfan without sfan means no fan control */
8364 /* all other models implement TP EC 0x2f control */
8365
8366 if (fans_handle) {
8367 /* X31, X40, X41 */
8368 fan_control_access_mode =
8369 TPACPI_FAN_WR_ACPI_FANS;
8370 fan_control_commands |=
8371 TPACPI_FAN_CMD_SPEED |
8372 TPACPI_FAN_CMD_LEVEL |
8373 TPACPI_FAN_CMD_ENABLE;
8374 } else {
8375 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8376 fan_control_commands |=
8377 TPACPI_FAN_CMD_LEVEL |
8378 TPACPI_FAN_CMD_ENABLE;
8379 }
8380 }
8381 }
8382
8383 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8384 "fan is %s, modes %d, %d\n",
8385 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8386 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8387 fan_status_access_mode, fan_control_access_mode);
8388
8389 /* fan control master switch */
8390 if (!fan_control_allowed) {
8391 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8392 fan_control_commands = 0;
8393 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8394 "fan control features disabled by parameter\n");
8395 }
8396
8397 /* update fan_control_desired_level */
8398 if (fan_status_access_mode != TPACPI_FAN_NONE)
8399 fan_get_status_safe(NULL);
8400
8401 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8402 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8403 if (tp_features.second_fan) {
8404 /* attach second fan tachometer */
8405 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8406 &dev_attr_fan2_input.attr;
8407 }
8408 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8409 &fan_attr_group);
8410 if (rc < 0)
8411 return rc;
8412
8413 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8414 &driver_attr_fan_watchdog);
8415 if (rc < 0) {
8416 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8417 &fan_attr_group);
8418 return rc;
8419 }
8420 return 0;
8421 } else
8422 return 1;
8423 }
8424
8425 static void fan_exit(void)
8426 {
8427 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8428 "cancelling any pending fan watchdog tasks\n");
8429
8430 /* FIXME: can we really do this unconditionally? */
8431 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8432 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8433 &driver_attr_fan_watchdog);
8434
8435 cancel_delayed_work(&fan_watchdog_task);
8436 flush_workqueue(tpacpi_wq);
8437 }
8438
8439 static void fan_suspend(void)
8440 {
8441 int rc;
8442
8443 if (!fan_control_allowed)
8444 return;
8445
8446 /* Store fan status in cache */
8447 fan_control_resume_level = 0;
8448 rc = fan_get_status_safe(&fan_control_resume_level);
8449 if (rc < 0)
8450 pr_notice("failed to read fan level for later "
8451 "restore during resume: %d\n", rc);
8452
8453 /* if it is undefined, don't attempt to restore it.
8454 * KEEP THIS LAST */
8455 if (tp_features.fan_ctrl_status_undef)
8456 fan_control_resume_level = 0;
8457 }
8458
8459 static void fan_resume(void)
8460 {
8461 u8 current_level = 7;
8462 bool do_set = false;
8463 int rc;
8464
8465 /* DSDT *always* updates status on resume */
8466 tp_features.fan_ctrl_status_undef = 0;
8467
8468 if (!fan_control_allowed ||
8469 !fan_control_resume_level ||
8470 (fan_get_status_safe(&current_level) < 0))
8471 return;
8472
8473 switch (fan_control_access_mode) {
8474 case TPACPI_FAN_WR_ACPI_SFAN:
8475 /* never decrease fan level */
8476 do_set = (fan_control_resume_level > current_level);
8477 break;
8478 case TPACPI_FAN_WR_ACPI_FANS:
8479 case TPACPI_FAN_WR_TPEC:
8480 /* never decrease fan level, scale is:
8481 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8482 *
8483 * We expect the firmware to set either 7 or AUTO, but we
8484 * handle FULLSPEED out of paranoia.
8485 *
8486 * So, we can safely only restore FULLSPEED or 7, anything
8487 * else could slow the fan. Restoring AUTO is useless, at
8488 * best that's exactly what the DSDT already set (it is the
8489 * slower it uses).
8490 *
8491 * Always keep in mind that the DSDT *will* have set the
8492 * fans to what the vendor supposes is the best level. We
8493 * muck with it only to speed the fan up.
8494 */
8495 if (fan_control_resume_level != 7 &&
8496 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8497 return;
8498 else
8499 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8500 (current_level != fan_control_resume_level);
8501 break;
8502 default:
8503 return;
8504 }
8505 if (do_set) {
8506 pr_notice("restoring fan level to 0x%02x\n",
8507 fan_control_resume_level);
8508 rc = fan_set_level_safe(fan_control_resume_level);
8509 if (rc < 0)
8510 pr_notice("failed to restore fan level: %d\n", rc);
8511 }
8512 }
8513
8514 static int fan_read(struct seq_file *m)
8515 {
8516 int rc;
8517 u8 status;
8518 unsigned int speed = 0;
8519
8520 switch (fan_status_access_mode) {
8521 case TPACPI_FAN_RD_ACPI_GFAN:
8522 /* 570, 600e/x, 770e, 770x */
8523 rc = fan_get_status_safe(&status);
8524 if (rc < 0)
8525 return rc;
8526
8527 seq_printf(m, "status:\t\t%s\n"
8528 "level:\t\t%d\n",
8529 (status != 0) ? "enabled" : "disabled", status);
8530 break;
8531
8532 case TPACPI_FAN_RD_TPEC:
8533 /* all except 570, 600e/x, 770e, 770x */
8534 rc = fan_get_status_safe(&status);
8535 if (rc < 0)
8536 return rc;
8537
8538 seq_printf(m, "status:\t\t%s\n",
8539 (status != 0) ? "enabled" : "disabled");
8540
8541 rc = fan_get_speed(&speed);
8542 if (rc < 0)
8543 return rc;
8544
8545 seq_printf(m, "speed:\t\t%d\n", speed);
8546
8547 if (status & TP_EC_FAN_FULLSPEED)
8548 /* Disengaged mode takes precedence */
8549 seq_printf(m, "level:\t\tdisengaged\n");
8550 else if (status & TP_EC_FAN_AUTO)
8551 seq_printf(m, "level:\t\tauto\n");
8552 else
8553 seq_printf(m, "level:\t\t%d\n", status);
8554 break;
8555
8556 case TPACPI_FAN_NONE:
8557 default:
8558 seq_printf(m, "status:\t\tnot supported\n");
8559 }
8560
8561 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8562 seq_printf(m, "commands:\tlevel <level>");
8563
8564 switch (fan_control_access_mode) {
8565 case TPACPI_FAN_WR_ACPI_SFAN:
8566 seq_printf(m, " (<level> is 0-7)\n");
8567 break;
8568
8569 default:
8570 seq_printf(m, " (<level> is 0-7, "
8571 "auto, disengaged, full-speed)\n");
8572 break;
8573 }
8574 }
8575
8576 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8577 seq_printf(m, "commands:\tenable, disable\n"
8578 "commands:\twatchdog <timeout> (<timeout> "
8579 "is 0 (off), 1-120 (seconds))\n");
8580
8581 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8582 seq_printf(m, "commands:\tspeed <speed>"
8583 " (<speed> is 0-65535)\n");
8584
8585 return 0;
8586 }
8587
8588 static int fan_write_cmd_level(const char *cmd, int *rc)
8589 {
8590 int level;
8591
8592 if (strlencmp(cmd, "level auto") == 0)
8593 level = TP_EC_FAN_AUTO;
8594 else if ((strlencmp(cmd, "level disengaged") == 0) |
8595 (strlencmp(cmd, "level full-speed") == 0))
8596 level = TP_EC_FAN_FULLSPEED;
8597 else if (sscanf(cmd, "level %d", &level) != 1)
8598 return 0;
8599
8600 *rc = fan_set_level_safe(level);
8601 if (*rc == -ENXIO)
8602 pr_err("level command accepted for unsupported access mode %d\n",
8603 fan_control_access_mode);
8604 else if (!*rc)
8605 tpacpi_disclose_usertask("procfs fan",
8606 "set level to %d\n", level);
8607
8608 return 1;
8609 }
8610
8611 static int fan_write_cmd_enable(const char *cmd, int *rc)
8612 {
8613 if (strlencmp(cmd, "enable") != 0)
8614 return 0;
8615
8616 *rc = fan_set_enable();
8617 if (*rc == -ENXIO)
8618 pr_err("enable command accepted for unsupported access mode %d\n",
8619 fan_control_access_mode);
8620 else if (!*rc)
8621 tpacpi_disclose_usertask("procfs fan", "enable\n");
8622
8623 return 1;
8624 }
8625
8626 static int fan_write_cmd_disable(const char *cmd, int *rc)
8627 {
8628 if (strlencmp(cmd, "disable") != 0)
8629 return 0;
8630
8631 *rc = fan_set_disable();
8632 if (*rc == -ENXIO)
8633 pr_err("disable command accepted for unsupported access mode %d\n",
8634 fan_control_access_mode);
8635 else if (!*rc)
8636 tpacpi_disclose_usertask("procfs fan", "disable\n");
8637
8638 return 1;
8639 }
8640
8641 static int fan_write_cmd_speed(const char *cmd, int *rc)
8642 {
8643 int speed;
8644
8645 /* TODO:
8646 * Support speed <low> <medium> <high> ? */
8647
8648 if (sscanf(cmd, "speed %d", &speed) != 1)
8649 return 0;
8650
8651 *rc = fan_set_speed(speed);
8652 if (*rc == -ENXIO)
8653 pr_err("speed command accepted for unsupported access mode %d\n",
8654 fan_control_access_mode);
8655 else if (!*rc)
8656 tpacpi_disclose_usertask("procfs fan",
8657 "set speed to %d\n", speed);
8658
8659 return 1;
8660 }
8661
8662 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8663 {
8664 int interval;
8665
8666 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8667 return 0;
8668
8669 if (interval < 0 || interval > 120)
8670 *rc = -EINVAL;
8671 else {
8672 fan_watchdog_maxinterval = interval;
8673 tpacpi_disclose_usertask("procfs fan",
8674 "set watchdog timer to %d\n",
8675 interval);
8676 }
8677
8678 return 1;
8679 }
8680
8681 static int fan_write(char *buf)
8682 {
8683 char *cmd;
8684 int rc = 0;
8685
8686 while (!rc && (cmd = next_cmd(&buf))) {
8687 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8688 fan_write_cmd_level(cmd, &rc)) &&
8689 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8690 (fan_write_cmd_enable(cmd, &rc) ||
8691 fan_write_cmd_disable(cmd, &rc) ||
8692 fan_write_cmd_watchdog(cmd, &rc))) &&
8693 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8694 fan_write_cmd_speed(cmd, &rc))
8695 )
8696 rc = -EINVAL;
8697 else if (!rc)
8698 fan_watchdog_reset();
8699 }
8700
8701 return rc;
8702 }
8703
8704 static struct ibm_struct fan_driver_data = {
8705 .name = "fan",
8706 .read = fan_read,
8707 .write = fan_write,
8708 .exit = fan_exit,
8709 .suspend = fan_suspend,
8710 .resume = fan_resume,
8711 };
8712
8713 /*************************************************************************
8714 * Mute LED subdriver
8715 */
8716
8717
8718 struct tp_led_table {
8719 acpi_string name;
8720 int on_value;
8721 int off_value;
8722 int state;
8723 };
8724
8725 static struct tp_led_table led_tables[] = {
8726 [TPACPI_LED_MUTE] = {
8727 .name = "SSMS",
8728 .on_value = 1,
8729 .off_value = 0,
8730 },
8731 [TPACPI_LED_MICMUTE] = {
8732 .name = "MMTS",
8733 .on_value = 2,
8734 .off_value = 0,
8735 },
8736 };
8737
8738 static int mute_led_on_off(struct tp_led_table *t, bool state)
8739 {
8740 acpi_handle temp;
8741 int output;
8742
8743 if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) {
8744 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
8745 return -EIO;
8746 }
8747
8748 if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
8749 state ? t->on_value : t->off_value))
8750 return -EIO;
8751
8752 t->state = state;
8753 return state;
8754 }
8755
8756 int tpacpi_led_set(int whichled, bool on)
8757 {
8758 struct tp_led_table *t;
8759
8760 if (whichled < 0 || whichled >= TPACPI_LED_MAX)
8761 return -EINVAL;
8762
8763 t = &led_tables[whichled];
8764 if (t->state < 0 || t->state == on)
8765 return t->state;
8766 return mute_led_on_off(t, on);
8767 }
8768 EXPORT_SYMBOL_GPL(tpacpi_led_set);
8769
8770 static int mute_led_init(struct ibm_init_struct *iibm)
8771 {
8772 acpi_handle temp;
8773 int i;
8774
8775 for (i = 0; i < TPACPI_LED_MAX; i++) {
8776 struct tp_led_table *t = &led_tables[i];
8777 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp)))
8778 mute_led_on_off(t, false);
8779 else
8780 t->state = -ENODEV;
8781 }
8782 return 0;
8783 }
8784
8785 static void mute_led_exit(void)
8786 {
8787 int i;
8788
8789 for (i = 0; i < TPACPI_LED_MAX; i++)
8790 tpacpi_led_set(i, false);
8791 }
8792
8793 static void mute_led_resume(void)
8794 {
8795 int i;
8796
8797 for (i = 0; i < TPACPI_LED_MAX; i++) {
8798 struct tp_led_table *t = &led_tables[i];
8799 if (t->state >= 0)
8800 mute_led_on_off(t, t->state);
8801 }
8802 }
8803
8804 static struct ibm_struct mute_led_driver_data = {
8805 .name = "mute_led",
8806 .exit = mute_led_exit,
8807 .resume = mute_led_resume,
8808 };
8809
8810 /****************************************************************************
8811 ****************************************************************************
8812 *
8813 * Infrastructure
8814 *
8815 ****************************************************************************
8816 ****************************************************************************/
8817
8818 /*
8819 * HKEY event callout for other subdrivers go here
8820 * (yes, it is ugly, but it is quick, safe, and gets the job done
8821 */
8822 static void tpacpi_driver_event(const unsigned int hkey_event)
8823 {
8824 if (ibm_backlight_device) {
8825 switch (hkey_event) {
8826 case TP_HKEY_EV_BRGHT_UP:
8827 case TP_HKEY_EV_BRGHT_DOWN:
8828 tpacpi_brightness_notify_change();
8829 }
8830 }
8831 if (alsa_card) {
8832 switch (hkey_event) {
8833 case TP_HKEY_EV_VOL_UP:
8834 case TP_HKEY_EV_VOL_DOWN:
8835 case TP_HKEY_EV_VOL_MUTE:
8836 volume_alsa_notify_change();
8837 }
8838 }
8839 }
8840
8841 static void hotkey_driver_event(const unsigned int scancode)
8842 {
8843 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8844 }
8845
8846 /* sysfs name ---------------------------------------------------------- */
8847 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8848 struct device_attribute *attr,
8849 char *buf)
8850 {
8851 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8852 }
8853
8854 static DEVICE_ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8855
8856 /* --------------------------------------------------------------------- */
8857
8858 /* /proc support */
8859 static struct proc_dir_entry *proc_dir;
8860
8861 /*
8862 * Module and infrastructure proble, init and exit handling
8863 */
8864
8865 static bool force_load;
8866
8867 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8868 static const char * __init str_supported(int is_supported)
8869 {
8870 static char text_unsupported[] __initdata = "not supported";
8871
8872 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
8873 }
8874 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8875
8876 static void ibm_exit(struct ibm_struct *ibm)
8877 {
8878 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8879
8880 list_del_init(&ibm->all_drivers);
8881
8882 if (ibm->flags.acpi_notify_installed) {
8883 dbg_printk(TPACPI_DBG_EXIT,
8884 "%s: acpi_remove_notify_handler\n", ibm->name);
8885 BUG_ON(!ibm->acpi);
8886 acpi_remove_notify_handler(*ibm->acpi->handle,
8887 ibm->acpi->type,
8888 dispatch_acpi_notify);
8889 ibm->flags.acpi_notify_installed = 0;
8890 }
8891
8892 if (ibm->flags.proc_created) {
8893 dbg_printk(TPACPI_DBG_EXIT,
8894 "%s: remove_proc_entry\n", ibm->name);
8895 remove_proc_entry(ibm->name, proc_dir);
8896 ibm->flags.proc_created = 0;
8897 }
8898
8899 if (ibm->flags.acpi_driver_registered) {
8900 dbg_printk(TPACPI_DBG_EXIT,
8901 "%s: acpi_bus_unregister_driver\n", ibm->name);
8902 BUG_ON(!ibm->acpi);
8903 acpi_bus_unregister_driver(ibm->acpi->driver);
8904 kfree(ibm->acpi->driver);
8905 ibm->acpi->driver = NULL;
8906 ibm->flags.acpi_driver_registered = 0;
8907 }
8908
8909 if (ibm->flags.init_called && ibm->exit) {
8910 ibm->exit();
8911 ibm->flags.init_called = 0;
8912 }
8913
8914 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8915 }
8916
8917 static int __init ibm_init(struct ibm_init_struct *iibm)
8918 {
8919 int ret;
8920 struct ibm_struct *ibm = iibm->data;
8921 struct proc_dir_entry *entry;
8922
8923 BUG_ON(ibm == NULL);
8924
8925 INIT_LIST_HEAD(&ibm->all_drivers);
8926
8927 if (ibm->flags.experimental && !experimental)
8928 return 0;
8929
8930 dbg_printk(TPACPI_DBG_INIT,
8931 "probing for %s\n", ibm->name);
8932
8933 if (iibm->init) {
8934 ret = iibm->init(iibm);
8935 if (ret > 0)
8936 return 0; /* probe failed */
8937 if (ret)
8938 return ret;
8939
8940 ibm->flags.init_called = 1;
8941 }
8942
8943 if (ibm->acpi) {
8944 if (ibm->acpi->hid) {
8945 ret = register_tpacpi_subdriver(ibm);
8946 if (ret)
8947 goto err_out;
8948 }
8949
8950 if (ibm->acpi->notify) {
8951 ret = setup_acpi_notify(ibm);
8952 if (ret == -ENODEV) {
8953 pr_notice("disabling subdriver %s\n",
8954 ibm->name);
8955 ret = 0;
8956 goto err_out;
8957 }
8958 if (ret < 0)
8959 goto err_out;
8960 }
8961 }
8962
8963 dbg_printk(TPACPI_DBG_INIT,
8964 "%s installed\n", ibm->name);
8965
8966 if (ibm->read) {
8967 umode_t mode = iibm->base_procfs_mode;
8968
8969 if (!mode)
8970 mode = S_IRUGO;
8971 if (ibm->write)
8972 mode |= S_IWUSR;
8973 entry = proc_create_data(ibm->name, mode, proc_dir,
8974 &dispatch_proc_fops, ibm);
8975 if (!entry) {
8976 pr_err("unable to create proc entry %s\n", ibm->name);
8977 ret = -ENODEV;
8978 goto err_out;
8979 }
8980 ibm->flags.proc_created = 1;
8981 }
8982
8983 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8984
8985 return 0;
8986
8987 err_out:
8988 dbg_printk(TPACPI_DBG_INIT,
8989 "%s: at error exit path with result %d\n",
8990 ibm->name, ret);
8991
8992 ibm_exit(ibm);
8993 return (ret < 0) ? ret : 0;
8994 }
8995
8996 /* Probing */
8997
8998 static bool __pure __init tpacpi_is_fw_digit(const char c)
8999 {
9000 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
9001 }
9002
9003 static bool __pure __init tpacpi_is_valid_fw_id(const char * const s,
9004 const char t)
9005 {
9006 /*
9007 * Most models: xxyTkkWW (#.##c)
9008 * Ancient 570/600 and -SL lacks (#.##c)
9009 */
9010 if (s && strlen(s) >= 8 &&
9011 tpacpi_is_fw_digit(s[0]) &&
9012 tpacpi_is_fw_digit(s[1]) &&
9013 s[2] == t &&
9014 (s[3] == 'T' || s[3] == 'N') &&
9015 tpacpi_is_fw_digit(s[4]) &&
9016 tpacpi_is_fw_digit(s[5]))
9017 return true;
9018
9019 /* New models: xxxyTkkW (#.##c); T550 and some others */
9020 return s && strlen(s) >= 8 &&
9021 tpacpi_is_fw_digit(s[0]) &&
9022 tpacpi_is_fw_digit(s[1]) &&
9023 tpacpi_is_fw_digit(s[2]) &&
9024 s[3] == t &&
9025 (s[4] == 'T' || s[4] == 'N') &&
9026 tpacpi_is_fw_digit(s[5]) &&
9027 tpacpi_is_fw_digit(s[6]);
9028 }
9029
9030 /* returns 0 - probe ok, or < 0 - probe error.
9031 * Probe ok doesn't mean thinkpad found.
9032 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
9033 static int __must_check __init get_thinkpad_model_data(
9034 struct thinkpad_id_data *tp)
9035 {
9036 const struct dmi_device *dev = NULL;
9037 char ec_fw_string[18];
9038 char const *s;
9039
9040 if (!tp)
9041 return -EINVAL;
9042
9043 memset(tp, 0, sizeof(*tp));
9044
9045 if (dmi_name_in_vendors("IBM"))
9046 tp->vendor = PCI_VENDOR_ID_IBM;
9047 else if (dmi_name_in_vendors("LENOVO"))
9048 tp->vendor = PCI_VENDOR_ID_LENOVO;
9049 else
9050 return 0;
9051
9052 s = dmi_get_system_info(DMI_BIOS_VERSION);
9053 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
9054 if (s && !tp->bios_version_str)
9055 return -ENOMEM;
9056
9057 /* Really ancient ThinkPad 240X will fail this, which is fine */
9058 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') ||
9059 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C')))
9060 return 0;
9061
9062 tp->bios_model = tp->bios_version_str[0]
9063 | (tp->bios_version_str[1] << 8);
9064 tp->bios_release = (tp->bios_version_str[4] << 8)
9065 | tp->bios_version_str[5];
9066
9067 /*
9068 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
9069 * X32 or newer, all Z series; Some models must have an
9070 * up-to-date BIOS or they will not be detected.
9071 *
9072 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9073 */
9074 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
9075 if (sscanf(dev->name,
9076 "IBM ThinkPad Embedded Controller -[%17c",
9077 ec_fw_string) == 1) {
9078 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
9079 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
9080
9081 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
9082 if (!tp->ec_version_str)
9083 return -ENOMEM;
9084
9085 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
9086 tp->ec_model = ec_fw_string[0]
9087 | (ec_fw_string[1] << 8);
9088 tp->ec_release = (ec_fw_string[4] << 8)
9089 | ec_fw_string[5];
9090 } else {
9091 pr_notice("ThinkPad firmware release %s "
9092 "doesn't match the known patterns\n",
9093 ec_fw_string);
9094 pr_notice("please report this to %s\n",
9095 TPACPI_MAIL);
9096 }
9097 break;
9098 }
9099 }
9100
9101 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
9102 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
9103 tp->model_str = kstrdup(s, GFP_KERNEL);
9104 if (!tp->model_str)
9105 return -ENOMEM;
9106 } else {
9107 s = dmi_get_system_info(DMI_BIOS_VENDOR);
9108 if (s && !(strncasecmp(s, "Lenovo", 6))) {
9109 tp->model_str = kstrdup(s, GFP_KERNEL);
9110 if (!tp->model_str)
9111 return -ENOMEM;
9112 }
9113 }
9114
9115 s = dmi_get_system_info(DMI_PRODUCT_NAME);
9116 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
9117 if (s && !tp->nummodel_str)
9118 return -ENOMEM;
9119
9120 return 0;
9121 }
9122
9123 static int __init probe_for_thinkpad(void)
9124 {
9125 int is_thinkpad;
9126
9127 if (acpi_disabled)
9128 return -ENODEV;
9129
9130 /* It would be dangerous to run the driver in this case */
9131 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
9132 return -ENODEV;
9133
9134 /*
9135 * Non-ancient models have better DMI tagging, but very old models
9136 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
9137 */
9138 is_thinkpad = (thinkpad_id.model_str != NULL) ||
9139 (thinkpad_id.ec_model != 0) ||
9140 tpacpi_is_fw_known();
9141
9142 /* The EC handler is required */
9143 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
9144 if (!ec_handle) {
9145 if (is_thinkpad)
9146 pr_err("Not yet supported ThinkPad detected!\n");
9147 return -ENODEV;
9148 }
9149
9150 if (!is_thinkpad && !force_load)
9151 return -ENODEV;
9152
9153 return 0;
9154 }
9155
9156 static void __init thinkpad_acpi_init_banner(void)
9157 {
9158 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
9159 pr_info("%s\n", TPACPI_URL);
9160
9161 pr_info("ThinkPad BIOS %s, EC %s\n",
9162 (thinkpad_id.bios_version_str) ?
9163 thinkpad_id.bios_version_str : "unknown",
9164 (thinkpad_id.ec_version_str) ?
9165 thinkpad_id.ec_version_str : "unknown");
9166
9167 BUG_ON(!thinkpad_id.vendor);
9168
9169 if (thinkpad_id.model_str)
9170 pr_info("%s %s, model %s\n",
9171 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
9172 "IBM" : ((thinkpad_id.vendor ==
9173 PCI_VENDOR_ID_LENOVO) ?
9174 "Lenovo" : "Unknown vendor"),
9175 thinkpad_id.model_str,
9176 (thinkpad_id.nummodel_str) ?
9177 thinkpad_id.nummodel_str : "unknown");
9178 }
9179
9180 /* Module init, exit, parameters */
9181
9182 static struct ibm_init_struct ibms_init[] __initdata = {
9183 {
9184 .data = &thinkpad_acpi_driver_data,
9185 },
9186 {
9187 .init = hotkey_init,
9188 .data = &hotkey_driver_data,
9189 },
9190 {
9191 .init = bluetooth_init,
9192 .data = &bluetooth_driver_data,
9193 },
9194 {
9195 .init = wan_init,
9196 .data = &wan_driver_data,
9197 },
9198 {
9199 .init = uwb_init,
9200 .data = &uwb_driver_data,
9201 },
9202 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
9203 {
9204 .init = video_init,
9205 .base_procfs_mode = S_IRUSR,
9206 .data = &video_driver_data,
9207 },
9208 #endif
9209 {
9210 .init = light_init,
9211 .data = &light_driver_data,
9212 },
9213 {
9214 .init = cmos_init,
9215 .data = &cmos_driver_data,
9216 },
9217 {
9218 .init = led_init,
9219 .data = &led_driver_data,
9220 },
9221 {
9222 .init = beep_init,
9223 .data = &beep_driver_data,
9224 },
9225 {
9226 .init = thermal_init,
9227 .data = &thermal_driver_data,
9228 },
9229 {
9230 .init = brightness_init,
9231 .data = &brightness_driver_data,
9232 },
9233 {
9234 .init = volume_init,
9235 .data = &volume_driver_data,
9236 },
9237 {
9238 .init = fan_init,
9239 .data = &fan_driver_data,
9240 },
9241 {
9242 .init = mute_led_init,
9243 .data = &mute_led_driver_data,
9244 },
9245 };
9246
9247 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
9248 {
9249 unsigned int i;
9250 struct ibm_struct *ibm;
9251
9252 if (!kp || !kp->name || !val)
9253 return -EINVAL;
9254
9255 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9256 ibm = ibms_init[i].data;
9257 WARN_ON(ibm == NULL);
9258
9259 if (!ibm || !ibm->name)
9260 continue;
9261
9262 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
9263 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
9264 return -ENOSPC;
9265 strcpy(ibms_init[i].param, val);
9266 strcat(ibms_init[i].param, ",");
9267 return 0;
9268 }
9269 }
9270
9271 return -EINVAL;
9272 }
9273
9274 module_param(experimental, int, 0444);
9275 MODULE_PARM_DESC(experimental,
9276 "Enables experimental features when non-zero");
9277
9278 module_param_named(debug, dbg_level, uint, 0);
9279 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
9280
9281 module_param(force_load, bool, 0444);
9282 MODULE_PARM_DESC(force_load,
9283 "Attempts to load the driver even on a "
9284 "mis-identified ThinkPad when true");
9285
9286 module_param_named(fan_control, fan_control_allowed, bool, 0444);
9287 MODULE_PARM_DESC(fan_control,
9288 "Enables setting fan parameters features when true");
9289
9290 module_param_named(brightness_mode, brightness_mode, uint, 0444);
9291 MODULE_PARM_DESC(brightness_mode,
9292 "Selects brightness control strategy: "
9293 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
9294
9295 module_param(brightness_enable, uint, 0444);
9296 MODULE_PARM_DESC(brightness_enable,
9297 "Enables backlight control when 1, disables when 0");
9298
9299 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
9300 module_param_named(volume_mode, volume_mode, uint, 0444);
9301 MODULE_PARM_DESC(volume_mode,
9302 "Selects volume control strategy: "
9303 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
9304
9305 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
9306 MODULE_PARM_DESC(volume_capabilities,
9307 "Selects the mixer capabilites: "
9308 "0=auto, 1=volume and mute, 2=mute only");
9309
9310 module_param_named(volume_control, volume_control_allowed, bool, 0444);
9311 MODULE_PARM_DESC(volume_control,
9312 "Enables software override for the console audio "
9313 "control when true");
9314
9315 module_param_named(software_mute, software_mute_requested, bool, 0444);
9316 MODULE_PARM_DESC(software_mute,
9317 "Request full software mute control");
9318
9319 /* ALSA module API parameters */
9320 module_param_named(index, alsa_index, int, 0444);
9321 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
9322 module_param_named(id, alsa_id, charp, 0444);
9323 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
9324 module_param_named(enable, alsa_enable, bool, 0444);
9325 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
9326 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
9327
9328 #define TPACPI_PARAM(feature) \
9329 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
9330 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
9331 "at module load, see documentation")
9332
9333 TPACPI_PARAM(hotkey);
9334 TPACPI_PARAM(bluetooth);
9335 TPACPI_PARAM(video);
9336 TPACPI_PARAM(light);
9337 TPACPI_PARAM(cmos);
9338 TPACPI_PARAM(led);
9339 TPACPI_PARAM(beep);
9340 TPACPI_PARAM(brightness);
9341 TPACPI_PARAM(volume);
9342 TPACPI_PARAM(fan);
9343
9344 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
9345 module_param(dbg_wlswemul, uint, 0444);
9346 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
9347 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
9348 MODULE_PARM_DESC(wlsw_state,
9349 "Initial state of the emulated WLSW switch");
9350
9351 module_param(dbg_bluetoothemul, uint, 0444);
9352 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
9353 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
9354 MODULE_PARM_DESC(bluetooth_state,
9355 "Initial state of the emulated bluetooth switch");
9356
9357 module_param(dbg_wwanemul, uint, 0444);
9358 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
9359 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
9360 MODULE_PARM_DESC(wwan_state,
9361 "Initial state of the emulated WWAN switch");
9362
9363 module_param(dbg_uwbemul, uint, 0444);
9364 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
9365 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
9366 MODULE_PARM_DESC(uwb_state,
9367 "Initial state of the emulated UWB switch");
9368 #endif
9369
9370 static void thinkpad_acpi_module_exit(void)
9371 {
9372 struct ibm_struct *ibm, *itmp;
9373
9374 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
9375
9376 list_for_each_entry_safe_reverse(ibm, itmp,
9377 &tpacpi_all_drivers,
9378 all_drivers) {
9379 ibm_exit(ibm);
9380 }
9381
9382 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
9383
9384 if (tpacpi_inputdev) {
9385 if (tp_features.input_device_registered)
9386 input_unregister_device(tpacpi_inputdev);
9387 else
9388 input_free_device(tpacpi_inputdev);
9389 kfree(hotkey_keycode_map);
9390 }
9391
9392 if (tpacpi_hwmon)
9393 hwmon_device_unregister(tpacpi_hwmon);
9394
9395 if (tp_features.sensors_pdev_attrs_registered)
9396 device_remove_file(&tpacpi_sensors_pdev->dev, &dev_attr_name);
9397 if (tpacpi_sensors_pdev)
9398 platform_device_unregister(tpacpi_sensors_pdev);
9399 if (tpacpi_pdev)
9400 platform_device_unregister(tpacpi_pdev);
9401
9402 if (tp_features.sensors_pdrv_attrs_registered)
9403 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
9404 if (tp_features.platform_drv_attrs_registered)
9405 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
9406
9407 if (tp_features.sensors_pdrv_registered)
9408 platform_driver_unregister(&tpacpi_hwmon_pdriver);
9409
9410 if (tp_features.platform_drv_registered)
9411 platform_driver_unregister(&tpacpi_pdriver);
9412
9413 if (proc_dir)
9414 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
9415
9416 if (tpacpi_wq)
9417 destroy_workqueue(tpacpi_wq);
9418
9419 kfree(thinkpad_id.bios_version_str);
9420 kfree(thinkpad_id.ec_version_str);
9421 kfree(thinkpad_id.model_str);
9422 kfree(thinkpad_id.nummodel_str);
9423 }
9424
9425
9426 static int __init thinkpad_acpi_module_init(void)
9427 {
9428 int ret, i;
9429
9430 tpacpi_lifecycle = TPACPI_LIFE_INIT;
9431
9432 /* Driver-level probe */
9433
9434 ret = get_thinkpad_model_data(&thinkpad_id);
9435 if (ret) {
9436 pr_err("unable to get DMI data: %d\n", ret);
9437 thinkpad_acpi_module_exit();
9438 return ret;
9439 }
9440 ret = probe_for_thinkpad();
9441 if (ret) {
9442 thinkpad_acpi_module_exit();
9443 return ret;
9444 }
9445
9446 /* Driver initialization */
9447
9448 thinkpad_acpi_init_banner();
9449 tpacpi_check_outdated_fw();
9450
9451 TPACPI_ACPIHANDLE_INIT(ecrd);
9452 TPACPI_ACPIHANDLE_INIT(ecwr);
9453
9454 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
9455 if (!tpacpi_wq) {
9456 thinkpad_acpi_module_exit();
9457 return -ENOMEM;
9458 }
9459
9460 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
9461 if (!proc_dir) {
9462 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
9463 thinkpad_acpi_module_exit();
9464 return -ENODEV;
9465 }
9466
9467 ret = platform_driver_register(&tpacpi_pdriver);
9468 if (ret) {
9469 pr_err("unable to register main platform driver\n");
9470 thinkpad_acpi_module_exit();
9471 return ret;
9472 }
9473 tp_features.platform_drv_registered = 1;
9474
9475 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9476 if (ret) {
9477 pr_err("unable to register hwmon platform driver\n");
9478 thinkpad_acpi_module_exit();
9479 return ret;
9480 }
9481 tp_features.sensors_pdrv_registered = 1;
9482
9483 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9484 if (!ret) {
9485 tp_features.platform_drv_attrs_registered = 1;
9486 ret = tpacpi_create_driver_attributes(
9487 &tpacpi_hwmon_pdriver.driver);
9488 }
9489 if (ret) {
9490 pr_err("unable to create sysfs driver attributes\n");
9491 thinkpad_acpi_module_exit();
9492 return ret;
9493 }
9494 tp_features.sensors_pdrv_attrs_registered = 1;
9495
9496
9497 /* Device initialization */
9498 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9499 NULL, 0);
9500 if (IS_ERR(tpacpi_pdev)) {
9501 ret = PTR_ERR(tpacpi_pdev);
9502 tpacpi_pdev = NULL;
9503 pr_err("unable to register platform device\n");
9504 thinkpad_acpi_module_exit();
9505 return ret;
9506 }
9507 tpacpi_sensors_pdev = platform_device_register_simple(
9508 TPACPI_HWMON_DRVR_NAME,
9509 -1, NULL, 0);
9510 if (IS_ERR(tpacpi_sensors_pdev)) {
9511 ret = PTR_ERR(tpacpi_sensors_pdev);
9512 tpacpi_sensors_pdev = NULL;
9513 pr_err("unable to register hwmon platform device\n");
9514 thinkpad_acpi_module_exit();
9515 return ret;
9516 }
9517 ret = device_create_file(&tpacpi_sensors_pdev->dev, &dev_attr_name);
9518 if (ret) {
9519 pr_err("unable to create sysfs hwmon device attributes\n");
9520 thinkpad_acpi_module_exit();
9521 return ret;
9522 }
9523 tp_features.sensors_pdev_attrs_registered = 1;
9524 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9525 if (IS_ERR(tpacpi_hwmon)) {
9526 ret = PTR_ERR(tpacpi_hwmon);
9527 tpacpi_hwmon = NULL;
9528 pr_err("unable to register hwmon device\n");
9529 thinkpad_acpi_module_exit();
9530 return ret;
9531 }
9532 mutex_init(&tpacpi_inputdev_send_mutex);
9533 tpacpi_inputdev = input_allocate_device();
9534 if (!tpacpi_inputdev) {
9535 thinkpad_acpi_module_exit();
9536 return -ENOMEM;
9537 } else {
9538 /* Prepare input device, but don't register */
9539 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9540 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9541 tpacpi_inputdev->id.bustype = BUS_HOST;
9542 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9543 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9544 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9545 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9546 }
9547
9548 /* Init subdriver dependencies */
9549 tpacpi_detect_brightness_capabilities();
9550
9551 /* Init subdrivers */
9552 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9553 ret = ibm_init(&ibms_init[i]);
9554 if (ret >= 0 && *ibms_init[i].param)
9555 ret = ibms_init[i].data->write(ibms_init[i].param);
9556 if (ret < 0) {
9557 thinkpad_acpi_module_exit();
9558 return ret;
9559 }
9560 }
9561
9562 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9563
9564 ret = input_register_device(tpacpi_inputdev);
9565 if (ret < 0) {
9566 pr_err("unable to register input device\n");
9567 thinkpad_acpi_module_exit();
9568 return ret;
9569 } else {
9570 tp_features.input_device_registered = 1;
9571 }
9572
9573 return 0;
9574 }
9575
9576 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9577
9578 /*
9579 * This will autoload the driver in almost every ThinkPad
9580 * in widespread use.
9581 *
9582 * Only _VERY_ old models, like the 240, 240x and 570 lack
9583 * the HKEY event interface.
9584 */
9585 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9586
9587 /*
9588 * DMI matching for module autoloading
9589 *
9590 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9591 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9592 *
9593 * Only models listed in thinkwiki will be supported, so add yours
9594 * if it is not there yet.
9595 */
9596 #define IBM_BIOS_MODULE_ALIAS(__type) \
9597 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9598
9599 /* Ancient thinkpad BIOSes have to be identified by
9600 * BIOS type or model number, and there are far less
9601 * BIOS types than model numbers... */
9602 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9603
9604 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9605 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9606 MODULE_DESCRIPTION(TPACPI_DESC);
9607 MODULE_VERSION(TPACPI_VERSION);
9608 MODULE_LICENSE("GPL");
9609
9610 module_init(thinkpad_acpi_module_init);
9611 module_exit(thinkpad_acpi_module_exit);
Linux kernel - Deliverables
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