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ALSA: hda_intel: add position_fix quirk for Asus K53E
[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 "0.24"
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
65 #include <linux/nvram.h>
66 #include <linux/proc_fs.h>
67 #include <linux/seq_file.h>
68 #include <linux/sysfs.h>
69 #include <linux/backlight.h>
70 #include <linux/fb.h>
71 #include <linux/platform_device.h>
72 #include <linux/hwmon.h>
73 #include <linux/hwmon-sysfs.h>
74 #include <linux/input.h>
75 #include <linux/leds.h>
76 #include <linux/rfkill.h>
77 #include <asm/uaccess.h>
78
79 #include <linux/dmi.h>
80 #include <linux/jiffies.h>
81 #include <linux/workqueue.h>
82
83 #include <sound/core.h>
84 #include <sound/control.h>
85 #include <sound/initval.h>
86
87 #include <acpi/acpi_drivers.h>
88
89 #include <linux/pci_ids.h>
90
91
92 /* ThinkPad CMOS commands */
93 #define TP_CMOS_VOLUME_DOWN 0
94 #define TP_CMOS_VOLUME_UP 1
95 #define TP_CMOS_VOLUME_MUTE 2
96 #define TP_CMOS_BRIGHTNESS_UP 4
97 #define TP_CMOS_BRIGHTNESS_DOWN 5
98 #define TP_CMOS_THINKLIGHT_ON 12
99 #define TP_CMOS_THINKLIGHT_OFF 13
100
101 /* NVRAM Addresses */
102 enum tp_nvram_addr {
103 TP_NVRAM_ADDR_HK2 = 0x57,
104 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
105 TP_NVRAM_ADDR_VIDEO = 0x59,
106 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
107 TP_NVRAM_ADDR_MIXER = 0x60,
108 };
109
110 /* NVRAM bit masks */
111 enum {
112 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
113 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
114 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
115 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
116 TP_NVRAM_MASK_THINKLIGHT = 0x10,
117 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
118 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
119 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
120 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
121 TP_NVRAM_MASK_MUTE = 0x40,
122 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
123 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
124 TP_NVRAM_POS_LEVEL_VOLUME = 0,
125 };
126
127 /* Misc NVRAM-related */
128 enum {
129 TP_NVRAM_LEVEL_VOLUME_MAX = 14,
130 };
131
132 /* ACPI HIDs */
133 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068"
134 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068"
135 #define TPACPI_ACPI_EC_HID "PNP0C09"
136
137 /* Input IDs */
138 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
139 #define TPACPI_HKEY_INPUT_VERSION 0x4101
140
141 /* ACPI \WGSV commands */
142 enum {
143 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
144 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
145 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
146 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
147 };
148
149 /* TP_ACPI_WGSV_GET_STATE bits */
150 enum {
151 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
152 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
153 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
154 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
155 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
156 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
157 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
158 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
159 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
160 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
161 };
162
163 /* HKEY events */
164 enum tpacpi_hkey_event_t {
165 /* Hotkey-related */
166 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
167 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
168 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
169 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
170 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
171 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
172
173 /* Reasons for waking up from S3/S4 */
174 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
175 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
176 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
177 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
178 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
179 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
180
181 /* Auto-sleep after eject request */
182 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
183 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
184
185 /* Misc bay events */
186 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
187 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
188 or port replicator */
189 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
190 dock or port replicator */
191
192 /* User-interface events */
193 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
194 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
195 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
196 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
197 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
198 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
199 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
200
201 /* Key-related user-interface events */
202 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */
203 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */
204
205 /* Thermal events */
206 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
207 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
208 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
209 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
210 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
211
212 TP_HKEY_EV_UNK_6040 = 0x6040, /* Related to AC change?
213 some sort of APM hint,
214 W520 */
215
216 /* Misc */
217 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
218 };
219
220 /****************************************************************************
221 * Main driver
222 */
223
224 #define TPACPI_NAME "thinkpad"
225 #define TPACPI_DESC "ThinkPad ACPI Extras"
226 #define TPACPI_FILE TPACPI_NAME "_acpi"
227 #define TPACPI_URL "http://ibm-acpi.sf.net/"
228 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
229
230 #define TPACPI_PROC_DIR "ibm"
231 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
232 #define TPACPI_DRVR_NAME TPACPI_FILE
233 #define TPACPI_DRVR_SHORTNAME "tpacpi"
234 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
235
236 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
237 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
238
239 #define TPACPI_MAX_ACPI_ARGS 3
240
241 /* Debugging printk groups */
242 #define TPACPI_DBG_ALL 0xffff
243 #define TPACPI_DBG_DISCLOSETASK 0x8000
244 #define TPACPI_DBG_INIT 0x0001
245 #define TPACPI_DBG_EXIT 0x0002
246 #define TPACPI_DBG_RFKILL 0x0004
247 #define TPACPI_DBG_HKEY 0x0008
248 #define TPACPI_DBG_FAN 0x0010
249 #define TPACPI_DBG_BRGHT 0x0020
250 #define TPACPI_DBG_MIXER 0x0040
251
252 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
253 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
254 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
255
256
257 /****************************************************************************
258 * Driver-wide structs and misc. variables
259 */
260
261 struct ibm_struct;
262
263 struct tp_acpi_drv_struct {
264 const struct acpi_device_id *hid;
265 struct acpi_driver *driver;
266
267 void (*notify) (struct ibm_struct *, u32);
268 acpi_handle *handle;
269 u32 type;
270 struct acpi_device *device;
271 };
272
273 struct ibm_struct {
274 char *name;
275
276 int (*read) (struct seq_file *);
277 int (*write) (char *);
278 void (*exit) (void);
279 void (*resume) (void);
280 void (*suspend) (void);
281 void (*shutdown) (void);
282
283 struct list_head all_drivers;
284
285 struct tp_acpi_drv_struct *acpi;
286
287 struct {
288 u8 acpi_driver_registered:1;
289 u8 acpi_notify_installed:1;
290 u8 proc_created:1;
291 u8 init_called:1;
292 u8 experimental:1;
293 } flags;
294 };
295
296 struct ibm_init_struct {
297 char param[32];
298
299 int (*init) (struct ibm_init_struct *);
300 umode_t base_procfs_mode;
301 struct ibm_struct *data;
302 };
303
304 static struct {
305 u32 bluetooth:1;
306 u32 hotkey:1;
307 u32 hotkey_mask:1;
308 u32 hotkey_wlsw:1;
309 u32 hotkey_tablet:1;
310 u32 light:1;
311 u32 light_status:1;
312 u32 bright_acpimode:1;
313 u32 bright_unkfw:1;
314 u32 wan:1;
315 u32 uwb:1;
316 u32 fan_ctrl_status_undef:1;
317 u32 second_fan:1;
318 u32 beep_needs_two_args:1;
319 u32 mixer_no_level_control:1;
320 u32 input_device_registered:1;
321 u32 platform_drv_registered:1;
322 u32 platform_drv_attrs_registered:1;
323 u32 sensors_pdrv_registered:1;
324 u32 sensors_pdrv_attrs_registered:1;
325 u32 sensors_pdev_attrs_registered:1;
326 u32 hotkey_poll_active:1;
327 } tp_features;
328
329 static struct {
330 u16 hotkey_mask_ff:1;
331 u16 volume_ctrl_forbidden:1;
332 } tp_warned;
333
334 struct thinkpad_id_data {
335 unsigned int vendor; /* ThinkPad vendor:
336 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
337
338 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
339 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
340
341 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
342 u16 ec_model;
343 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
344 u16 ec_release;
345
346 char *model_str; /* ThinkPad T43 */
347 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
348 };
349 static struct thinkpad_id_data thinkpad_id;
350
351 static enum {
352 TPACPI_LIFE_INIT = 0,
353 TPACPI_LIFE_RUNNING,
354 TPACPI_LIFE_EXITING,
355 } tpacpi_lifecycle;
356
357 static int experimental;
358 static u32 dbg_level;
359
360 static struct workqueue_struct *tpacpi_wq;
361
362 enum led_status_t {
363 TPACPI_LED_OFF = 0,
364 TPACPI_LED_ON,
365 TPACPI_LED_BLINK,
366 };
367
368 /* Special LED class that can defer work */
369 struct tpacpi_led_classdev {
370 struct led_classdev led_classdev;
371 struct work_struct work;
372 enum led_status_t new_state;
373 unsigned int led;
374 };
375
376 /* brightness level capabilities */
377 static unsigned int bright_maxlvl; /* 0 = unknown */
378
379 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
380 static int dbg_wlswemul;
381 static bool tpacpi_wlsw_emulstate;
382 static int dbg_bluetoothemul;
383 static bool tpacpi_bluetooth_emulstate;
384 static int dbg_wwanemul;
385 static bool tpacpi_wwan_emulstate;
386 static int dbg_uwbemul;
387 static bool tpacpi_uwb_emulstate;
388 #endif
389
390
391 /*************************************************************************
392 * Debugging helpers
393 */
394
395 #define dbg_printk(a_dbg_level, format, arg...) \
396 do { \
397 if (dbg_level & (a_dbg_level)) \
398 printk(KERN_DEBUG pr_fmt("%s: " format), \
399 __func__, ##arg); \
400 } while (0)
401
402 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
403 #define vdbg_printk dbg_printk
404 static const char *str_supported(int is_supported);
405 #else
406 static inline const char *str_supported(int is_supported) { return ""; }
407 #define vdbg_printk(a_dbg_level, format, arg...) \
408 no_printk(format, ##arg)
409 #endif
410
411 static void tpacpi_log_usertask(const char * const what)
412 {
413 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
414 what, task_tgid_vnr(current));
415 }
416
417 #define tpacpi_disclose_usertask(what, format, arg...) \
418 do { \
419 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \
420 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
421 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \
422 what, task_tgid_vnr(current), ## arg); \
423 } \
424 } while (0)
425
426 /*
427 * Quirk handling helpers
428 *
429 * ThinkPad IDs and versions seen in the field so far
430 * are two-characters from the set [0-9A-Z], i.e. base 36.
431 *
432 * We use values well outside that range as specials.
433 */
434
435 #define TPACPI_MATCH_ANY 0xffffU
436 #define TPACPI_MATCH_UNKNOWN 0U
437
438 /* TPID('1', 'Y') == 0x5931 */
439 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
440
441 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
442 { .vendor = PCI_VENDOR_ID_IBM, \
443 .bios = TPID(__id1, __id2), \
444 .ec = TPACPI_MATCH_ANY, \
445 .quirks = (__quirk) }
446
447 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
448 { .vendor = PCI_VENDOR_ID_LENOVO, \
449 .bios = TPID(__id1, __id2), \
450 .ec = TPACPI_MATCH_ANY, \
451 .quirks = (__quirk) }
452
453 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
454 { .vendor = PCI_VENDOR_ID_LENOVO, \
455 .bios = TPACPI_MATCH_ANY, \
456 .ec = TPID(__id1, __id2), \
457 .quirks = (__quirk) }
458
459 struct tpacpi_quirk {
460 unsigned int vendor;
461 u16 bios;
462 u16 ec;
463 unsigned long quirks;
464 };
465
466 /**
467 * tpacpi_check_quirks() - search BIOS/EC version on a list
468 * @qlist: array of &struct tpacpi_quirk
469 * @qlist_size: number of elements in @qlist
470 *
471 * Iterates over a quirks list until one is found that matches the
472 * ThinkPad's vendor, BIOS and EC model.
473 *
474 * Returns 0 if nothing matches, otherwise returns the quirks field of
475 * the matching &struct tpacpi_quirk entry.
476 *
477 * The match criteria is: vendor, ec and bios much match.
478 */
479 static unsigned long __init tpacpi_check_quirks(
480 const struct tpacpi_quirk *qlist,
481 unsigned int qlist_size)
482 {
483 while (qlist_size) {
484 if ((qlist->vendor == thinkpad_id.vendor ||
485 qlist->vendor == TPACPI_MATCH_ANY) &&
486 (qlist->bios == thinkpad_id.bios_model ||
487 qlist->bios == TPACPI_MATCH_ANY) &&
488 (qlist->ec == thinkpad_id.ec_model ||
489 qlist->ec == TPACPI_MATCH_ANY))
490 return qlist->quirks;
491
492 qlist_size--;
493 qlist++;
494 }
495 return 0;
496 }
497
498 static inline bool __pure __init tpacpi_is_lenovo(void)
499 {
500 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
501 }
502
503 static inline bool __pure __init tpacpi_is_ibm(void)
504 {
505 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
506 }
507
508 /****************************************************************************
509 ****************************************************************************
510 *
511 * ACPI Helpers and device model
512 *
513 ****************************************************************************
514 ****************************************************************************/
515
516 /*************************************************************************
517 * ACPI basic handles
518 */
519
520 static acpi_handle root_handle;
521 static acpi_handle ec_handle;
522
523 #define TPACPI_HANDLE(object, parent, paths...) \
524 static acpi_handle object##_handle; \
525 static const acpi_handle *object##_parent __initdata = \
526 &parent##_handle; \
527 static char *object##_paths[] __initdata = { paths }
528
529 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
530 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
531
532 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
533 /* T4x, X31, X40 */
534 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
535 "\\CMS", /* R40, R40e */
536 ); /* all others */
537
538 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
539 "^HKEY", /* R30, R31 */
540 "HKEY", /* all others */
541 ); /* 570 */
542
543 /*************************************************************************
544 * ACPI helpers
545 */
546
547 static int acpi_evalf(acpi_handle handle,
548 void *res, char *method, char *fmt, ...)
549 {
550 char *fmt0 = fmt;
551 struct acpi_object_list params;
552 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
553 struct acpi_buffer result, *resultp;
554 union acpi_object out_obj;
555 acpi_status status;
556 va_list ap;
557 char res_type;
558 int success;
559 int quiet;
560
561 if (!*fmt) {
562 pr_err("acpi_evalf() called with empty format\n");
563 return 0;
564 }
565
566 if (*fmt == 'q') {
567 quiet = 1;
568 fmt++;
569 } else
570 quiet = 0;
571
572 res_type = *(fmt++);
573
574 params.count = 0;
575 params.pointer = &in_objs[0];
576
577 va_start(ap, fmt);
578 while (*fmt) {
579 char c = *(fmt++);
580 switch (c) {
581 case 'd': /* int */
582 in_objs[params.count].integer.value = va_arg(ap, int);
583 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
584 break;
585 /* add more types as needed */
586 default:
587 pr_err("acpi_evalf() called "
588 "with invalid format character '%c'\n", c);
589 va_end(ap);
590 return 0;
591 }
592 }
593 va_end(ap);
594
595 if (res_type != 'v') {
596 result.length = sizeof(out_obj);
597 result.pointer = &out_obj;
598 resultp = &result;
599 } else
600 resultp = NULL;
601
602 status = acpi_evaluate_object(handle, method, &params, resultp);
603
604 switch (res_type) {
605 case 'd': /* int */
606 success = (status == AE_OK &&
607 out_obj.type == ACPI_TYPE_INTEGER);
608 if (success && res)
609 *(int *)res = out_obj.integer.value;
610 break;
611 case 'v': /* void */
612 success = status == AE_OK;
613 break;
614 /* add more types as needed */
615 default:
616 pr_err("acpi_evalf() called "
617 "with invalid format character '%c'\n", res_type);
618 return 0;
619 }
620
621 if (!success && !quiet)
622 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
623 method, fmt0, acpi_format_exception(status));
624
625 return success;
626 }
627
628 static int acpi_ec_read(int i, u8 *p)
629 {
630 int v;
631
632 if (ecrd_handle) {
633 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
634 return 0;
635 *p = v;
636 } else {
637 if (ec_read(i, p) < 0)
638 return 0;
639 }
640
641 return 1;
642 }
643
644 static int acpi_ec_write(int i, u8 v)
645 {
646 if (ecwr_handle) {
647 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
648 return 0;
649 } else {
650 if (ec_write(i, v) < 0)
651 return 0;
652 }
653
654 return 1;
655 }
656
657 static int issue_thinkpad_cmos_command(int cmos_cmd)
658 {
659 if (!cmos_handle)
660 return -ENXIO;
661
662 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
663 return -EIO;
664
665 return 0;
666 }
667
668 /*************************************************************************
669 * ACPI device model
670 */
671
672 #define TPACPI_ACPIHANDLE_INIT(object) \
673 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
674 object##_paths, ARRAY_SIZE(object##_paths))
675
676 static void __init drv_acpi_handle_init(const char *name,
677 acpi_handle *handle, const acpi_handle parent,
678 char **paths, const int num_paths)
679 {
680 int i;
681 acpi_status status;
682
683 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
684 name);
685
686 for (i = 0; i < num_paths; i++) {
687 status = acpi_get_handle(parent, paths[i], handle);
688 if (ACPI_SUCCESS(status)) {
689 dbg_printk(TPACPI_DBG_INIT,
690 "Found ACPI handle %s for %s\n",
691 paths[i], name);
692 return;
693 }
694 }
695
696 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
697 name);
698 *handle = NULL;
699 }
700
701 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
702 u32 level, void *context, void **return_value)
703 {
704 *(acpi_handle *)return_value = handle;
705
706 return AE_CTRL_TERMINATE;
707 }
708
709 static void __init tpacpi_acpi_handle_locate(const char *name,
710 const char *hid,
711 acpi_handle *handle)
712 {
713 acpi_status status;
714 acpi_handle device_found;
715
716 BUG_ON(!name || !hid || !handle);
717 vdbg_printk(TPACPI_DBG_INIT,
718 "trying to locate ACPI handle for %s, using HID %s\n",
719 name, hid);
720
721 memset(&device_found, 0, sizeof(device_found));
722 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
723 (void *)name, &device_found);
724
725 *handle = NULL;
726
727 if (ACPI_SUCCESS(status)) {
728 *handle = device_found;
729 dbg_printk(TPACPI_DBG_INIT,
730 "Found ACPI handle for %s\n", name);
731 } else {
732 vdbg_printk(TPACPI_DBG_INIT,
733 "Could not locate an ACPI handle for %s: %s\n",
734 name, acpi_format_exception(status));
735 }
736 }
737
738 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
739 {
740 struct ibm_struct *ibm = data;
741
742 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
743 return;
744
745 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
746 return;
747
748 ibm->acpi->notify(ibm, event);
749 }
750
751 static int __init setup_acpi_notify(struct ibm_struct *ibm)
752 {
753 acpi_status status;
754 int rc;
755
756 BUG_ON(!ibm->acpi);
757
758 if (!*ibm->acpi->handle)
759 return 0;
760
761 vdbg_printk(TPACPI_DBG_INIT,
762 "setting up ACPI notify for %s\n", ibm->name);
763
764 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
765 if (rc < 0) {
766 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
767 return -ENODEV;
768 }
769
770 ibm->acpi->device->driver_data = ibm;
771 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
772 TPACPI_ACPI_EVENT_PREFIX,
773 ibm->name);
774
775 status = acpi_install_notify_handler(*ibm->acpi->handle,
776 ibm->acpi->type, dispatch_acpi_notify, ibm);
777 if (ACPI_FAILURE(status)) {
778 if (status == AE_ALREADY_EXISTS) {
779 pr_notice("another device driver is already "
780 "handling %s events\n", ibm->name);
781 } else {
782 pr_err("acpi_install_notify_handler(%s) failed: %s\n",
783 ibm->name, acpi_format_exception(status));
784 }
785 return -ENODEV;
786 }
787 ibm->flags.acpi_notify_installed = 1;
788 return 0;
789 }
790
791 static int __init tpacpi_device_add(struct acpi_device *device)
792 {
793 return 0;
794 }
795
796 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
797 {
798 int rc;
799
800 dbg_printk(TPACPI_DBG_INIT,
801 "registering %s as an ACPI driver\n", ibm->name);
802
803 BUG_ON(!ibm->acpi);
804
805 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
806 if (!ibm->acpi->driver) {
807 pr_err("failed to allocate memory for ibm->acpi->driver\n");
808 return -ENOMEM;
809 }
810
811 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
812 ibm->acpi->driver->ids = ibm->acpi->hid;
813
814 ibm->acpi->driver->ops.add = &tpacpi_device_add;
815
816 rc = acpi_bus_register_driver(ibm->acpi->driver);
817 if (rc < 0) {
818 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
819 ibm->name, rc);
820 kfree(ibm->acpi->driver);
821 ibm->acpi->driver = NULL;
822 } else if (!rc)
823 ibm->flags.acpi_driver_registered = 1;
824
825 return rc;
826 }
827
828
829 /****************************************************************************
830 ****************************************************************************
831 *
832 * Procfs Helpers
833 *
834 ****************************************************************************
835 ****************************************************************************/
836
837 static int dispatch_proc_show(struct seq_file *m, void *v)
838 {
839 struct ibm_struct *ibm = m->private;
840
841 if (!ibm || !ibm->read)
842 return -EINVAL;
843 return ibm->read(m);
844 }
845
846 static int dispatch_proc_open(struct inode *inode, struct file *file)
847 {
848 return single_open(file, dispatch_proc_show, PDE(inode)->data);
849 }
850
851 static ssize_t dispatch_proc_write(struct file *file,
852 const char __user *userbuf,
853 size_t count, loff_t *pos)
854 {
855 struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
856 char *kernbuf;
857 int ret;
858
859 if (!ibm || !ibm->write)
860 return -EINVAL;
861 if (count > PAGE_SIZE - 2)
862 return -EINVAL;
863
864 kernbuf = kmalloc(count + 2, GFP_KERNEL);
865 if (!kernbuf)
866 return -ENOMEM;
867
868 if (copy_from_user(kernbuf, userbuf, count)) {
869 kfree(kernbuf);
870 return -EFAULT;
871 }
872
873 kernbuf[count] = 0;
874 strcat(kernbuf, ",");
875 ret = ibm->write(kernbuf);
876 if (ret == 0)
877 ret = count;
878
879 kfree(kernbuf);
880
881 return ret;
882 }
883
884 static const struct file_operations dispatch_proc_fops = {
885 .owner = THIS_MODULE,
886 .open = dispatch_proc_open,
887 .read = seq_read,
888 .llseek = seq_lseek,
889 .release = single_release,
890 .write = dispatch_proc_write,
891 };
892
893 static char *next_cmd(char **cmds)
894 {
895 char *start = *cmds;
896 char *end;
897
898 while ((end = strchr(start, ',')) && end == start)
899 start = end + 1;
900
901 if (!end)
902 return NULL;
903
904 *end = 0;
905 *cmds = end + 1;
906 return start;
907 }
908
909
910 /****************************************************************************
911 ****************************************************************************
912 *
913 * Device model: input, hwmon and platform
914 *
915 ****************************************************************************
916 ****************************************************************************/
917
918 static struct platform_device *tpacpi_pdev;
919 static struct platform_device *tpacpi_sensors_pdev;
920 static struct device *tpacpi_hwmon;
921 static struct input_dev *tpacpi_inputdev;
922 static struct mutex tpacpi_inputdev_send_mutex;
923 static LIST_HEAD(tpacpi_all_drivers);
924
925 static int tpacpi_suspend_handler(struct device *dev)
926 {
927 struct ibm_struct *ibm, *itmp;
928
929 list_for_each_entry_safe(ibm, itmp,
930 &tpacpi_all_drivers,
931 all_drivers) {
932 if (ibm->suspend)
933 (ibm->suspend)();
934 }
935
936 return 0;
937 }
938
939 static int tpacpi_resume_handler(struct device *dev)
940 {
941 struct ibm_struct *ibm, *itmp;
942
943 list_for_each_entry_safe(ibm, itmp,
944 &tpacpi_all_drivers,
945 all_drivers) {
946 if (ibm->resume)
947 (ibm->resume)();
948 }
949
950 return 0;
951 }
952
953 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
954 tpacpi_suspend_handler, tpacpi_resume_handler);
955
956 static void tpacpi_shutdown_handler(struct platform_device *pdev)
957 {
958 struct ibm_struct *ibm, *itmp;
959
960 list_for_each_entry_safe(ibm, itmp,
961 &tpacpi_all_drivers,
962 all_drivers) {
963 if (ibm->shutdown)
964 (ibm->shutdown)();
965 }
966 }
967
968 static struct platform_driver tpacpi_pdriver = {
969 .driver = {
970 .name = TPACPI_DRVR_NAME,
971 .owner = THIS_MODULE,
972 .pm = &tpacpi_pm,
973 },
974 .shutdown = tpacpi_shutdown_handler,
975 };
976
977 static struct platform_driver tpacpi_hwmon_pdriver = {
978 .driver = {
979 .name = TPACPI_HWMON_DRVR_NAME,
980 .owner = THIS_MODULE,
981 },
982 };
983
984 /*************************************************************************
985 * sysfs support helpers
986 */
987
988 struct attribute_set {
989 unsigned int members, max_members;
990 struct attribute_group group;
991 };
992
993 struct attribute_set_obj {
994 struct attribute_set s;
995 struct attribute *a;
996 } __attribute__((packed));
997
998 static struct attribute_set *create_attr_set(unsigned int max_members,
999 const char *name)
1000 {
1001 struct attribute_set_obj *sobj;
1002
1003 if (max_members == 0)
1004 return NULL;
1005
1006 /* Allocates space for implicit NULL at the end too */
1007 sobj = kzalloc(sizeof(struct attribute_set_obj) +
1008 max_members * sizeof(struct attribute *),
1009 GFP_KERNEL);
1010 if (!sobj)
1011 return NULL;
1012 sobj->s.max_members = max_members;
1013 sobj->s.group.attrs = &sobj->a;
1014 sobj->s.group.name = name;
1015
1016 return &sobj->s;
1017 }
1018
1019 #define destroy_attr_set(_set) \
1020 kfree(_set);
1021
1022 /* not multi-threaded safe, use it in a single thread per set */
1023 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1024 {
1025 if (!s || !attr)
1026 return -EINVAL;
1027
1028 if (s->members >= s->max_members)
1029 return -ENOMEM;
1030
1031 s->group.attrs[s->members] = attr;
1032 s->members++;
1033
1034 return 0;
1035 }
1036
1037 static int add_many_to_attr_set(struct attribute_set *s,
1038 struct attribute **attr,
1039 unsigned int count)
1040 {
1041 int i, res;
1042
1043 for (i = 0; i < count; i++) {
1044 res = add_to_attr_set(s, attr[i]);
1045 if (res)
1046 return res;
1047 }
1048
1049 return 0;
1050 }
1051
1052 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1053 {
1054 sysfs_remove_group(kobj, &s->group);
1055 destroy_attr_set(s);
1056 }
1057
1058 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1059 sysfs_create_group(_kobj, &_attr_set->group)
1060
1061 static int parse_strtoul(const char *buf,
1062 unsigned long max, unsigned long *value)
1063 {
1064 char *endp;
1065
1066 *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1067 endp = skip_spaces(endp);
1068 if (*endp || *value > max)
1069 return -EINVAL;
1070
1071 return 0;
1072 }
1073
1074 static void tpacpi_disable_brightness_delay(void)
1075 {
1076 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1077 pr_notice("ACPI backlight control delay disabled\n");
1078 }
1079
1080 static void printk_deprecated_attribute(const char * const what,
1081 const char * const details)
1082 {
1083 tpacpi_log_usertask("deprecated sysfs attribute");
1084 pr_warn("WARNING: sysfs attribute %s is deprecated and "
1085 "will be removed. %s\n",
1086 what, details);
1087 }
1088
1089 /*************************************************************************
1090 * rfkill and radio control support helpers
1091 */
1092
1093 /*
1094 * ThinkPad-ACPI firmware handling model:
1095 *
1096 * WLSW (master wireless switch) is event-driven, and is common to all
1097 * firmware-controlled radios. It cannot be controlled, just monitored,
1098 * as expected. It overrides all radio state in firmware
1099 *
1100 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1101 * (TODO: verify how WLSW interacts with the returned radio state).
1102 *
1103 * The only time there are shadow radio state changes, is when
1104 * masked-off hotkeys are used.
1105 */
1106
1107 /*
1108 * Internal driver API for radio state:
1109 *
1110 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1111 * bool: true means radio blocked (off)
1112 */
1113 enum tpacpi_rfkill_state {
1114 TPACPI_RFK_RADIO_OFF = 0,
1115 TPACPI_RFK_RADIO_ON
1116 };
1117
1118 /* rfkill switches */
1119 enum tpacpi_rfk_id {
1120 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1121 TPACPI_RFK_WWAN_SW_ID,
1122 TPACPI_RFK_UWB_SW_ID,
1123 TPACPI_RFK_SW_MAX
1124 };
1125
1126 static const char *tpacpi_rfkill_names[] = {
1127 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1128 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1129 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1130 [TPACPI_RFK_SW_MAX] = NULL
1131 };
1132
1133 /* ThinkPad-ACPI rfkill subdriver */
1134 struct tpacpi_rfk {
1135 struct rfkill *rfkill;
1136 enum tpacpi_rfk_id id;
1137 const struct tpacpi_rfk_ops *ops;
1138 };
1139
1140 struct tpacpi_rfk_ops {
1141 /* firmware interface */
1142 int (*get_status)(void);
1143 int (*set_status)(const enum tpacpi_rfkill_state);
1144 };
1145
1146 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1147
1148 /* Query FW and update rfkill sw state for a given rfkill switch */
1149 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1150 {
1151 int status;
1152
1153 if (!tp_rfk)
1154 return -ENODEV;
1155
1156 status = (tp_rfk->ops->get_status)();
1157 if (status < 0)
1158 return status;
1159
1160 rfkill_set_sw_state(tp_rfk->rfkill,
1161 (status == TPACPI_RFK_RADIO_OFF));
1162
1163 return status;
1164 }
1165
1166 /* Query FW and update rfkill sw state for all rfkill switches */
1167 static void tpacpi_rfk_update_swstate_all(void)
1168 {
1169 unsigned int i;
1170
1171 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1172 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1173 }
1174
1175 /*
1176 * Sync the HW-blocking state of all rfkill switches,
1177 * do notice it causes the rfkill core to schedule uevents
1178 */
1179 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1180 {
1181 unsigned int i;
1182 struct tpacpi_rfk *tp_rfk;
1183
1184 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1185 tp_rfk = tpacpi_rfkill_switches[i];
1186 if (tp_rfk) {
1187 if (rfkill_set_hw_state(tp_rfk->rfkill,
1188 blocked)) {
1189 /* ignore -- we track sw block */
1190 }
1191 }
1192 }
1193 }
1194
1195 /* Call to get the WLSW state from the firmware */
1196 static int hotkey_get_wlsw(void);
1197
1198 /* Call to query WLSW state and update all rfkill switches */
1199 static bool tpacpi_rfk_check_hwblock_state(void)
1200 {
1201 int res = hotkey_get_wlsw();
1202 int hw_blocked;
1203
1204 /* When unknown or unsupported, we have to assume it is unblocked */
1205 if (res < 0)
1206 return false;
1207
1208 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1209 tpacpi_rfk_update_hwblock_state(hw_blocked);
1210
1211 return hw_blocked;
1212 }
1213
1214 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1215 {
1216 struct tpacpi_rfk *tp_rfk = data;
1217 int res;
1218
1219 dbg_printk(TPACPI_DBG_RFKILL,
1220 "request to change radio state to %s\n",
1221 blocked ? "blocked" : "unblocked");
1222
1223 /* try to set radio state */
1224 res = (tp_rfk->ops->set_status)(blocked ?
1225 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1226
1227 /* and update the rfkill core with whatever the FW really did */
1228 tpacpi_rfk_update_swstate(tp_rfk);
1229
1230 return (res < 0) ? res : 0;
1231 }
1232
1233 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1234 .set_block = tpacpi_rfk_hook_set_block,
1235 };
1236
1237 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1238 const struct tpacpi_rfk_ops *tp_rfkops,
1239 const enum rfkill_type rfktype,
1240 const char *name,
1241 const bool set_default)
1242 {
1243 struct tpacpi_rfk *atp_rfk;
1244 int res;
1245 bool sw_state = false;
1246 bool hw_state;
1247 int sw_status;
1248
1249 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1250
1251 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1252 if (atp_rfk)
1253 atp_rfk->rfkill = rfkill_alloc(name,
1254 &tpacpi_pdev->dev,
1255 rfktype,
1256 &tpacpi_rfk_rfkill_ops,
1257 atp_rfk);
1258 if (!atp_rfk || !atp_rfk->rfkill) {
1259 pr_err("failed to allocate memory for rfkill class\n");
1260 kfree(atp_rfk);
1261 return -ENOMEM;
1262 }
1263
1264 atp_rfk->id = id;
1265 atp_rfk->ops = tp_rfkops;
1266
1267 sw_status = (tp_rfkops->get_status)();
1268 if (sw_status < 0) {
1269 pr_err("failed to read initial state for %s, error %d\n",
1270 name, sw_status);
1271 } else {
1272 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1273 if (set_default) {
1274 /* try to keep the initial state, since we ask the
1275 * firmware to preserve it across S5 in NVRAM */
1276 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1277 }
1278 }
1279 hw_state = tpacpi_rfk_check_hwblock_state();
1280 rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1281
1282 res = rfkill_register(atp_rfk->rfkill);
1283 if (res < 0) {
1284 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1285 rfkill_destroy(atp_rfk->rfkill);
1286 kfree(atp_rfk);
1287 return res;
1288 }
1289
1290 tpacpi_rfkill_switches[id] = atp_rfk;
1291
1292 pr_info("rfkill switch %s: radio is %sblocked\n",
1293 name, (sw_state || hw_state) ? "" : "un");
1294 return 0;
1295 }
1296
1297 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1298 {
1299 struct tpacpi_rfk *tp_rfk;
1300
1301 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1302
1303 tp_rfk = tpacpi_rfkill_switches[id];
1304 if (tp_rfk) {
1305 rfkill_unregister(tp_rfk->rfkill);
1306 rfkill_destroy(tp_rfk->rfkill);
1307 tpacpi_rfkill_switches[id] = NULL;
1308 kfree(tp_rfk);
1309 }
1310 }
1311
1312 static void printk_deprecated_rfkill_attribute(const char * const what)
1313 {
1314 printk_deprecated_attribute(what,
1315 "Please switch to generic rfkill before year 2010");
1316 }
1317
1318 /* sysfs <radio> enable ------------------------------------------------ */
1319 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1320 struct device_attribute *attr,
1321 char *buf)
1322 {
1323 int status;
1324
1325 printk_deprecated_rfkill_attribute(attr->attr.name);
1326
1327 /* This is in the ABI... */
1328 if (tpacpi_rfk_check_hwblock_state()) {
1329 status = TPACPI_RFK_RADIO_OFF;
1330 } else {
1331 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1332 if (status < 0)
1333 return status;
1334 }
1335
1336 return snprintf(buf, PAGE_SIZE, "%d\n",
1337 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1338 }
1339
1340 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1341 struct device_attribute *attr,
1342 const char *buf, size_t count)
1343 {
1344 unsigned long t;
1345 int res;
1346
1347 printk_deprecated_rfkill_attribute(attr->attr.name);
1348
1349 if (parse_strtoul(buf, 1, &t))
1350 return -EINVAL;
1351
1352 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1353
1354 /* This is in the ABI... */
1355 if (tpacpi_rfk_check_hwblock_state() && !!t)
1356 return -EPERM;
1357
1358 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1359 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1360 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1361
1362 return (res < 0) ? res : count;
1363 }
1364
1365 /* procfs -------------------------------------------------------------- */
1366 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1367 {
1368 if (id >= TPACPI_RFK_SW_MAX)
1369 seq_printf(m, "status:\t\tnot supported\n");
1370 else {
1371 int status;
1372
1373 /* This is in the ABI... */
1374 if (tpacpi_rfk_check_hwblock_state()) {
1375 status = TPACPI_RFK_RADIO_OFF;
1376 } else {
1377 status = tpacpi_rfk_update_swstate(
1378 tpacpi_rfkill_switches[id]);
1379 if (status < 0)
1380 return status;
1381 }
1382
1383 seq_printf(m, "status:\t\t%s\n",
1384 (status == TPACPI_RFK_RADIO_ON) ?
1385 "enabled" : "disabled");
1386 seq_printf(m, "commands:\tenable, disable\n");
1387 }
1388
1389 return 0;
1390 }
1391
1392 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1393 {
1394 char *cmd;
1395 int status = -1;
1396 int res = 0;
1397
1398 if (id >= TPACPI_RFK_SW_MAX)
1399 return -ENODEV;
1400
1401 while ((cmd = next_cmd(&buf))) {
1402 if (strlencmp(cmd, "enable") == 0)
1403 status = TPACPI_RFK_RADIO_ON;
1404 else if (strlencmp(cmd, "disable") == 0)
1405 status = TPACPI_RFK_RADIO_OFF;
1406 else
1407 return -EINVAL;
1408 }
1409
1410 if (status != -1) {
1411 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1412 (status == TPACPI_RFK_RADIO_ON) ?
1413 "enable" : "disable",
1414 tpacpi_rfkill_names[id]);
1415 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1416 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1417 }
1418
1419 return res;
1420 }
1421
1422 /*************************************************************************
1423 * thinkpad-acpi driver attributes
1424 */
1425
1426 /* interface_version --------------------------------------------------- */
1427 static ssize_t tpacpi_driver_interface_version_show(
1428 struct device_driver *drv,
1429 char *buf)
1430 {
1431 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1432 }
1433
1434 static DRIVER_ATTR(interface_version, S_IRUGO,
1435 tpacpi_driver_interface_version_show, NULL);
1436
1437 /* debug_level --------------------------------------------------------- */
1438 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1439 char *buf)
1440 {
1441 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1442 }
1443
1444 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1445 const char *buf, size_t count)
1446 {
1447 unsigned long t;
1448
1449 if (parse_strtoul(buf, 0xffff, &t))
1450 return -EINVAL;
1451
1452 dbg_level = t;
1453
1454 return count;
1455 }
1456
1457 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1458 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1459
1460 /* version ------------------------------------------------------------- */
1461 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1462 char *buf)
1463 {
1464 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1465 TPACPI_DESC, TPACPI_VERSION);
1466 }
1467
1468 static DRIVER_ATTR(version, S_IRUGO,
1469 tpacpi_driver_version_show, NULL);
1470
1471 /* --------------------------------------------------------------------- */
1472
1473 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1474
1475 /* wlsw_emulstate ------------------------------------------------------ */
1476 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1477 char *buf)
1478 {
1479 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1480 }
1481
1482 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1483 const char *buf, size_t count)
1484 {
1485 unsigned long t;
1486
1487 if (parse_strtoul(buf, 1, &t))
1488 return -EINVAL;
1489
1490 if (tpacpi_wlsw_emulstate != !!t) {
1491 tpacpi_wlsw_emulstate = !!t;
1492 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1493 }
1494
1495 return count;
1496 }
1497
1498 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1499 tpacpi_driver_wlsw_emulstate_show,
1500 tpacpi_driver_wlsw_emulstate_store);
1501
1502 /* bluetooth_emulstate ------------------------------------------------- */
1503 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1504 struct device_driver *drv,
1505 char *buf)
1506 {
1507 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1508 }
1509
1510 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1511 struct device_driver *drv,
1512 const char *buf, size_t count)
1513 {
1514 unsigned long t;
1515
1516 if (parse_strtoul(buf, 1, &t))
1517 return -EINVAL;
1518
1519 tpacpi_bluetooth_emulstate = !!t;
1520
1521 return count;
1522 }
1523
1524 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1525 tpacpi_driver_bluetooth_emulstate_show,
1526 tpacpi_driver_bluetooth_emulstate_store);
1527
1528 /* wwan_emulstate ------------------------------------------------- */
1529 static ssize_t tpacpi_driver_wwan_emulstate_show(
1530 struct device_driver *drv,
1531 char *buf)
1532 {
1533 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1534 }
1535
1536 static ssize_t tpacpi_driver_wwan_emulstate_store(
1537 struct device_driver *drv,
1538 const char *buf, size_t count)
1539 {
1540 unsigned long t;
1541
1542 if (parse_strtoul(buf, 1, &t))
1543 return -EINVAL;
1544
1545 tpacpi_wwan_emulstate = !!t;
1546
1547 return count;
1548 }
1549
1550 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1551 tpacpi_driver_wwan_emulstate_show,
1552 tpacpi_driver_wwan_emulstate_store);
1553
1554 /* uwb_emulstate ------------------------------------------------- */
1555 static ssize_t tpacpi_driver_uwb_emulstate_show(
1556 struct device_driver *drv,
1557 char *buf)
1558 {
1559 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1560 }
1561
1562 static ssize_t tpacpi_driver_uwb_emulstate_store(
1563 struct device_driver *drv,
1564 const char *buf, size_t count)
1565 {
1566 unsigned long t;
1567
1568 if (parse_strtoul(buf, 1, &t))
1569 return -EINVAL;
1570
1571 tpacpi_uwb_emulstate = !!t;
1572
1573 return count;
1574 }
1575
1576 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1577 tpacpi_driver_uwb_emulstate_show,
1578 tpacpi_driver_uwb_emulstate_store);
1579 #endif
1580
1581 /* --------------------------------------------------------------------- */
1582
1583 static struct driver_attribute *tpacpi_driver_attributes[] = {
1584 &driver_attr_debug_level, &driver_attr_version,
1585 &driver_attr_interface_version,
1586 };
1587
1588 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1589 {
1590 int i, res;
1591
1592 i = 0;
1593 res = 0;
1594 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1595 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1596 i++;
1597 }
1598
1599 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1600 if (!res && dbg_wlswemul)
1601 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1602 if (!res && dbg_bluetoothemul)
1603 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1604 if (!res && dbg_wwanemul)
1605 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1606 if (!res && dbg_uwbemul)
1607 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1608 #endif
1609
1610 return res;
1611 }
1612
1613 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1614 {
1615 int i;
1616
1617 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1618 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1619
1620 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1621 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1622 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1623 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1624 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1625 #endif
1626 }
1627
1628 /*************************************************************************
1629 * Firmware Data
1630 */
1631
1632 /*
1633 * Table of recommended minimum BIOS versions
1634 *
1635 * Reasons for listing:
1636 * 1. Stable BIOS, listed because the unknown amount of
1637 * bugs and bad ACPI behaviour on older versions
1638 *
1639 * 2. BIOS or EC fw with known bugs that trigger on Linux
1640 *
1641 * 3. BIOS with known reduced functionality in older versions
1642 *
1643 * We recommend the latest BIOS and EC version.
1644 * We only support the latest BIOS and EC fw version as a rule.
1645 *
1646 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1647 * Information from users in ThinkWiki
1648 *
1649 * WARNING: we use this table also to detect that the machine is
1650 * a ThinkPad in some cases, so don't remove entries lightly.
1651 */
1652
1653 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1654 { .vendor = (__v), \
1655 .bios = TPID(__id1, __id2), \
1656 .ec = TPACPI_MATCH_ANY, \
1657 .quirks = TPACPI_MATCH_ANY << 16 \
1658 | (__bv1) << 8 | (__bv2) }
1659
1660 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1661 __eid, __ev1, __ev2) \
1662 { .vendor = (__v), \
1663 .bios = TPID(__bid1, __bid2), \
1664 .ec = __eid, \
1665 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1666 | (__bv1) << 8 | (__bv2) }
1667
1668 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1669 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1670
1671 /* Outdated IBM BIOSes often lack the EC id string */
1672 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1673 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1674 __bv1, __bv2, TPID(__id1, __id2), \
1675 __ev1, __ev2), \
1676 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1677 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1678 __ev1, __ev2)
1679
1680 /* Outdated IBM BIOSes often lack the EC id string */
1681 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1682 __eid1, __eid2, __ev1, __ev2) \
1683 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1684 __bv1, __bv2, TPID(__eid1, __eid2), \
1685 __ev1, __ev2), \
1686 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1687 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1688 __ev1, __ev2)
1689
1690 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1691 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1692
1693 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1694 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1695 __bv1, __bv2, TPID(__id1, __id2), \
1696 __ev1, __ev2)
1697
1698 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1699 __eid1, __eid2, __ev1, __ev2) \
1700 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1701 __bv1, __bv2, TPID(__eid1, __eid2), \
1702 __ev1, __ev2)
1703
1704 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1705 /* Numeric models ------------------ */
1706 /* FW MODEL BIOS VERS */
1707 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1708 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1709 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1710 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1711 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1712 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1713 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1714 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1715 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1716
1717 /* A-series ------------------------- */
1718 /* FW MODEL BIOS VERS EC VERS */
1719 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1720 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1721 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1722 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1723 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1724 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1725 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1726 TPV_QI0('1', '3', '2', '0'), /* A22m */
1727 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1728 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1729 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1730
1731 /* G-series ------------------------- */
1732 /* FW MODEL BIOS VERS */
1733 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1734 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1735
1736 /* R-series, T-series --------------- */
1737 /* FW MODEL BIOS VERS EC VERS */
1738 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1739 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1740 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1741 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1742 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1743 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1744 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1745 T40/p, T41/p, T42/p (1) */
1746 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1747 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1748 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1749 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1750
1751 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1752 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1753 TPV_QI0('1', '6', '3', '2'), /* T22 */
1754 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1755 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1756 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1757
1758 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1759 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1760 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1761
1762 /* BIOS FW BIOS VERS EC FW EC VERS */
1763 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1764 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1765
1766 /* X-series ------------------------- */
1767 /* FW MODEL BIOS VERS EC VERS */
1768 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1769 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1770 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1771 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1772 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1773 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1774 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1775
1776 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1777 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1778
1779 /* (0) - older versions lack DMI EC fw string and functionality */
1780 /* (1) - older versions known to lack functionality */
1781 };
1782
1783 #undef TPV_QL1
1784 #undef TPV_QL0
1785 #undef TPV_QI2
1786 #undef TPV_QI1
1787 #undef TPV_QI0
1788 #undef TPV_Q_X
1789 #undef TPV_Q
1790
1791 static void __init tpacpi_check_outdated_fw(void)
1792 {
1793 unsigned long fwvers;
1794 u16 ec_version, bios_version;
1795
1796 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1797 ARRAY_SIZE(tpacpi_bios_version_qtable));
1798
1799 if (!fwvers)
1800 return;
1801
1802 bios_version = fwvers & 0xffffU;
1803 ec_version = (fwvers >> 16) & 0xffffU;
1804
1805 /* note that unknown versions are set to 0x0000 and we use that */
1806 if ((bios_version > thinkpad_id.bios_release) ||
1807 (ec_version > thinkpad_id.ec_release &&
1808 ec_version != TPACPI_MATCH_ANY)) {
1809 /*
1810 * The changelogs would let us track down the exact
1811 * reason, but it is just too much of a pain to track
1812 * it. We only list BIOSes that are either really
1813 * broken, or really stable to begin with, so it is
1814 * best if the user upgrades the firmware anyway.
1815 */
1816 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1817 pr_warn("WARNING: This firmware may be missing critical bug "
1818 "fixes and/or important features\n");
1819 }
1820 }
1821
1822 static bool __init tpacpi_is_fw_known(void)
1823 {
1824 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1825 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1826 }
1827
1828 /****************************************************************************
1829 ****************************************************************************
1830 *
1831 * Subdrivers
1832 *
1833 ****************************************************************************
1834 ****************************************************************************/
1835
1836 /*************************************************************************
1837 * thinkpad-acpi metadata subdriver
1838 */
1839
1840 static int thinkpad_acpi_driver_read(struct seq_file *m)
1841 {
1842 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1843 seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1844 return 0;
1845 }
1846
1847 static struct ibm_struct thinkpad_acpi_driver_data = {
1848 .name = "driver",
1849 .read = thinkpad_acpi_driver_read,
1850 };
1851
1852 /*************************************************************************
1853 * Hotkey subdriver
1854 */
1855
1856 /*
1857 * ThinkPad firmware event model
1858 *
1859 * The ThinkPad firmware has two main event interfaces: normal ACPI
1860 * notifications (which follow the ACPI standard), and a private event
1861 * interface.
1862 *
1863 * The private event interface also issues events for the hotkeys. As
1864 * the driver gained features, the event handling code ended up being
1865 * built around the hotkey subdriver. This will need to be refactored
1866 * to a more formal event API eventually.
1867 *
1868 * Some "hotkeys" are actually supposed to be used as event reports,
1869 * such as "brightness has changed", "volume has changed", depending on
1870 * the ThinkPad model and how the firmware is operating.
1871 *
1872 * Unlike other classes, hotkey-class events have mask/unmask control on
1873 * non-ancient firmware. However, how it behaves changes a lot with the
1874 * firmware model and version.
1875 */
1876
1877 enum { /* hot key scan codes (derived from ACPI DSDT) */
1878 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1879 TP_ACPI_HOTKEYSCAN_FNF2,
1880 TP_ACPI_HOTKEYSCAN_FNF3,
1881 TP_ACPI_HOTKEYSCAN_FNF4,
1882 TP_ACPI_HOTKEYSCAN_FNF5,
1883 TP_ACPI_HOTKEYSCAN_FNF6,
1884 TP_ACPI_HOTKEYSCAN_FNF7,
1885 TP_ACPI_HOTKEYSCAN_FNF8,
1886 TP_ACPI_HOTKEYSCAN_FNF9,
1887 TP_ACPI_HOTKEYSCAN_FNF10,
1888 TP_ACPI_HOTKEYSCAN_FNF11,
1889 TP_ACPI_HOTKEYSCAN_FNF12,
1890 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1891 TP_ACPI_HOTKEYSCAN_FNINSERT,
1892 TP_ACPI_HOTKEYSCAN_FNDELETE,
1893 TP_ACPI_HOTKEYSCAN_FNHOME,
1894 TP_ACPI_HOTKEYSCAN_FNEND,
1895 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1896 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1897 TP_ACPI_HOTKEYSCAN_FNSPACE,
1898 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1899 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1900 TP_ACPI_HOTKEYSCAN_MUTE,
1901 TP_ACPI_HOTKEYSCAN_THINKPAD,
1902 TP_ACPI_HOTKEYSCAN_UNK1,
1903 TP_ACPI_HOTKEYSCAN_UNK2,
1904 TP_ACPI_HOTKEYSCAN_UNK3,
1905 TP_ACPI_HOTKEYSCAN_UNK4,
1906 TP_ACPI_HOTKEYSCAN_UNK5,
1907 TP_ACPI_HOTKEYSCAN_UNK6,
1908 TP_ACPI_HOTKEYSCAN_UNK7,
1909 TP_ACPI_HOTKEYSCAN_UNK8,
1910
1911 /* Hotkey keymap size */
1912 TPACPI_HOTKEY_MAP_LEN
1913 };
1914
1915 enum { /* Keys/events available through NVRAM polling */
1916 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1917 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1918 };
1919
1920 enum { /* Positions of some of the keys in hotkey masks */
1921 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1922 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1923 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1924 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1925 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1926 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1927 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1928 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1929 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1930 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1931 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1932 };
1933
1934 enum { /* NVRAM to ACPI HKEY group map */
1935 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1936 TP_ACPI_HKEY_ZOOM_MASK |
1937 TP_ACPI_HKEY_DISPSWTCH_MASK |
1938 TP_ACPI_HKEY_HIBERNATE_MASK,
1939 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1940 TP_ACPI_HKEY_BRGHTDWN_MASK,
1941 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1942 TP_ACPI_HKEY_VOLDWN_MASK |
1943 TP_ACPI_HKEY_MUTE_MASK,
1944 };
1945
1946 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1947 struct tp_nvram_state {
1948 u16 thinkpad_toggle:1;
1949 u16 zoom_toggle:1;
1950 u16 display_toggle:1;
1951 u16 thinklight_toggle:1;
1952 u16 hibernate_toggle:1;
1953 u16 displayexp_toggle:1;
1954 u16 display_state:1;
1955 u16 brightness_toggle:1;
1956 u16 volume_toggle:1;
1957 u16 mute:1;
1958
1959 u8 brightness_level;
1960 u8 volume_level;
1961 };
1962
1963 /* kthread for the hotkey poller */
1964 static struct task_struct *tpacpi_hotkey_task;
1965
1966 /* Acquired while the poller kthread is running, use to sync start/stop */
1967 static struct mutex hotkey_thread_mutex;
1968
1969 /*
1970 * Acquire mutex to write poller control variables as an
1971 * atomic block.
1972 *
1973 * Increment hotkey_config_change when changing them if you
1974 * want the kthread to forget old state.
1975 *
1976 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1977 */
1978 static struct mutex hotkey_thread_data_mutex;
1979 static unsigned int hotkey_config_change;
1980
1981 /*
1982 * hotkey poller control variables
1983 *
1984 * Must be atomic or readers will also need to acquire mutex
1985 *
1986 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1987 * should be used only when the changes need to be taken as
1988 * a block, OR when one needs to force the kthread to forget
1989 * old state.
1990 */
1991 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1992 static unsigned int hotkey_poll_freq = 10; /* Hz */
1993
1994 #define HOTKEY_CONFIG_CRITICAL_START \
1995 do { \
1996 mutex_lock(&hotkey_thread_data_mutex); \
1997 hotkey_config_change++; \
1998 } while (0);
1999 #define HOTKEY_CONFIG_CRITICAL_END \
2000 mutex_unlock(&hotkey_thread_data_mutex);
2001
2002 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2003
2004 #define hotkey_source_mask 0U
2005 #define HOTKEY_CONFIG_CRITICAL_START
2006 #define HOTKEY_CONFIG_CRITICAL_END
2007
2008 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2009
2010 static struct mutex hotkey_mutex;
2011
2012 static enum { /* Reasons for waking up */
2013 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2014 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2015 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2016 } hotkey_wakeup_reason;
2017
2018 static int hotkey_autosleep_ack;
2019
2020 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2021 static u32 hotkey_all_mask; /* all events supported in fw */
2022 static u32 hotkey_reserved_mask; /* events better left disabled */
2023 static u32 hotkey_driver_mask; /* events needed by the driver */
2024 static u32 hotkey_user_mask; /* events visible to userspace */
2025 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2026
2027 static unsigned int hotkey_report_mode;
2028
2029 static u16 *hotkey_keycode_map;
2030
2031 static struct attribute_set *hotkey_dev_attributes;
2032
2033 static void tpacpi_driver_event(const unsigned int hkey_event);
2034 static void hotkey_driver_event(const unsigned int scancode);
2035 static void hotkey_poll_setup(const bool may_warn);
2036
2037 /* HKEY.MHKG() return bits */
2038 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2039
2040 static int hotkey_get_wlsw(void)
2041 {
2042 int status;
2043
2044 if (!tp_features.hotkey_wlsw)
2045 return -ENODEV;
2046
2047 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2048 if (dbg_wlswemul)
2049 return (tpacpi_wlsw_emulstate) ?
2050 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2051 #endif
2052
2053 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2054 return -EIO;
2055
2056 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2057 }
2058
2059 static int hotkey_get_tablet_mode(int *status)
2060 {
2061 int s;
2062
2063 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2064 return -EIO;
2065
2066 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2067 return 0;
2068 }
2069
2070 /*
2071 * Reads current event mask from firmware, and updates
2072 * hotkey_acpi_mask accordingly. Also resets any bits
2073 * from hotkey_user_mask that are unavailable to be
2074 * delivered (shadow requirement of the userspace ABI).
2075 *
2076 * Call with hotkey_mutex held
2077 */
2078 static int hotkey_mask_get(void)
2079 {
2080 if (tp_features.hotkey_mask) {
2081 u32 m = 0;
2082
2083 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2084 return -EIO;
2085
2086 hotkey_acpi_mask = m;
2087 } else {
2088 /* no mask support doesn't mean no event support... */
2089 hotkey_acpi_mask = hotkey_all_mask;
2090 }
2091
2092 /* sync userspace-visible mask */
2093 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2094
2095 return 0;
2096 }
2097
2098 void static hotkey_mask_warn_incomplete_mask(void)
2099 {
2100 /* log only what the user can fix... */
2101 const u32 wantedmask = hotkey_driver_mask &
2102 ~(hotkey_acpi_mask | hotkey_source_mask) &
2103 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2104
2105 if (wantedmask)
2106 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2107 }
2108
2109 /*
2110 * Set the firmware mask when supported
2111 *
2112 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2113 *
2114 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2115 *
2116 * Call with hotkey_mutex held
2117 */
2118 static int hotkey_mask_set(u32 mask)
2119 {
2120 int i;
2121 int rc = 0;
2122
2123 const u32 fwmask = mask & ~hotkey_source_mask;
2124
2125 if (tp_features.hotkey_mask) {
2126 for (i = 0; i < 32; i++) {
2127 if (!acpi_evalf(hkey_handle,
2128 NULL, "MHKM", "vdd", i + 1,
2129 !!(mask & (1 << i)))) {
2130 rc = -EIO;
2131 break;
2132 }
2133 }
2134 }
2135
2136 /*
2137 * We *must* make an inconditional call to hotkey_mask_get to
2138 * refresh hotkey_acpi_mask and update hotkey_user_mask
2139 *
2140 * Take the opportunity to also log when we cannot _enable_
2141 * a given event.
2142 */
2143 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2144 pr_notice("asked for hotkey mask 0x%08x, but "
2145 "firmware forced it to 0x%08x\n",
2146 fwmask, hotkey_acpi_mask);
2147 }
2148
2149 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2150 hotkey_mask_warn_incomplete_mask();
2151
2152 return rc;
2153 }
2154
2155 /*
2156 * Sets hotkey_user_mask and tries to set the firmware mask
2157 *
2158 * Call with hotkey_mutex held
2159 */
2160 static int hotkey_user_mask_set(const u32 mask)
2161 {
2162 int rc;
2163
2164 /* Give people a chance to notice they are doing something that
2165 * is bound to go boom on their users sooner or later */
2166 if (!tp_warned.hotkey_mask_ff &&
2167 (mask == 0xffff || mask == 0xffffff ||
2168 mask == 0xffffffff)) {
2169 tp_warned.hotkey_mask_ff = 1;
2170 pr_notice("setting the hotkey mask to 0x%08x is likely "
2171 "not the best way to go about it\n", mask);
2172 pr_notice("please consider using the driver defaults, "
2173 "and refer to up-to-date thinkpad-acpi "
2174 "documentation\n");
2175 }
2176
2177 /* Try to enable what the user asked for, plus whatever we need.
2178 * this syncs everything but won't enable bits in hotkey_user_mask */
2179 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2180
2181 /* Enable the available bits in hotkey_user_mask */
2182 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2183
2184 return rc;
2185 }
2186
2187 /*
2188 * Sets the driver hotkey mask.
2189 *
2190 * Can be called even if the hotkey subdriver is inactive
2191 */
2192 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2193 {
2194 int rc;
2195
2196 /* Do the right thing if hotkey_init has not been called yet */
2197 if (!tp_features.hotkey) {
2198 hotkey_driver_mask = mask;
2199 return 0;
2200 }
2201
2202 mutex_lock(&hotkey_mutex);
2203
2204 HOTKEY_CONFIG_CRITICAL_START
2205 hotkey_driver_mask = mask;
2206 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2207 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2208 #endif
2209 HOTKEY_CONFIG_CRITICAL_END
2210
2211 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2212 ~hotkey_source_mask);
2213 hotkey_poll_setup(true);
2214
2215 mutex_unlock(&hotkey_mutex);
2216
2217 return rc;
2218 }
2219
2220 static int hotkey_status_get(int *status)
2221 {
2222 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2223 return -EIO;
2224
2225 return 0;
2226 }
2227
2228 static int hotkey_status_set(bool enable)
2229 {
2230 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2231 return -EIO;
2232
2233 return 0;
2234 }
2235
2236 static void tpacpi_input_send_tabletsw(void)
2237 {
2238 int state;
2239
2240 if (tp_features.hotkey_tablet &&
2241 !hotkey_get_tablet_mode(&state)) {
2242 mutex_lock(&tpacpi_inputdev_send_mutex);
2243
2244 input_report_switch(tpacpi_inputdev,
2245 SW_TABLET_MODE, !!state);
2246 input_sync(tpacpi_inputdev);
2247
2248 mutex_unlock(&tpacpi_inputdev_send_mutex);
2249 }
2250 }
2251
2252 /* Do NOT call without validating scancode first */
2253 static void tpacpi_input_send_key(const unsigned int scancode)
2254 {
2255 const unsigned int keycode = hotkey_keycode_map[scancode];
2256
2257 if (keycode != KEY_RESERVED) {
2258 mutex_lock(&tpacpi_inputdev_send_mutex);
2259
2260 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2261 input_report_key(tpacpi_inputdev, keycode, 1);
2262 input_sync(tpacpi_inputdev);
2263
2264 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2265 input_report_key(tpacpi_inputdev, keycode, 0);
2266 input_sync(tpacpi_inputdev);
2267
2268 mutex_unlock(&tpacpi_inputdev_send_mutex);
2269 }
2270 }
2271
2272 /* Do NOT call without validating scancode first */
2273 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2274 {
2275 hotkey_driver_event(scancode);
2276 if (hotkey_user_mask & (1 << scancode))
2277 tpacpi_input_send_key(scancode);
2278 }
2279
2280 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2281 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2282
2283 /* Do NOT call without validating scancode first */
2284 static void tpacpi_hotkey_send_key(unsigned int scancode)
2285 {
2286 tpacpi_input_send_key_masked(scancode);
2287 if (hotkey_report_mode < 2) {
2288 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2289 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2290 }
2291 }
2292
2293 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2294 {
2295 u8 d;
2296
2297 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2298 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2299 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2300 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2301 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2302 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2303 }
2304 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2305 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2306 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2307 }
2308 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2309 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2310 n->displayexp_toggle =
2311 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2312 }
2313 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2314 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2315 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2316 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2317 n->brightness_toggle =
2318 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2319 }
2320 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2321 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2322 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2323 >> TP_NVRAM_POS_LEVEL_VOLUME;
2324 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2325 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2326 }
2327 }
2328
2329 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2330 struct tp_nvram_state *newn,
2331 const u32 event_mask)
2332 {
2333
2334 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2335 do { \
2336 if ((event_mask & (1 << __scancode)) && \
2337 oldn->__member != newn->__member) \
2338 tpacpi_hotkey_send_key(__scancode); \
2339 } while (0)
2340
2341 #define TPACPI_MAY_SEND_KEY(__scancode) \
2342 do { \
2343 if (event_mask & (1 << __scancode)) \
2344 tpacpi_hotkey_send_key(__scancode); \
2345 } while (0)
2346
2347 void issue_volchange(const unsigned int oldvol,
2348 const unsigned int newvol)
2349 {
2350 unsigned int i = oldvol;
2351
2352 while (i > newvol) {
2353 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2354 i--;
2355 }
2356 while (i < newvol) {
2357 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2358 i++;
2359 }
2360 }
2361
2362 void issue_brightnesschange(const unsigned int oldbrt,
2363 const unsigned int newbrt)
2364 {
2365 unsigned int i = oldbrt;
2366
2367 while (i > newbrt) {
2368 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2369 i--;
2370 }
2371 while (i < newbrt) {
2372 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2373 i++;
2374 }
2375 }
2376
2377 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2378 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2379 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2380 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2381
2382 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2383
2384 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2385
2386 /*
2387 * Handle volume
2388 *
2389 * This code is supposed to duplicate the IBM firmware behaviour:
2390 * - Pressing MUTE issues mute hotkey message, even when already mute
2391 * - Pressing Volume up/down issues volume up/down hotkey messages,
2392 * even when already at maximum or minimum volume
2393 * - The act of unmuting issues volume up/down notification,
2394 * depending which key was used to unmute
2395 *
2396 * We are constrained to what the NVRAM can tell us, which is not much
2397 * and certainly not enough if more than one volume hotkey was pressed
2398 * since the last poll cycle.
2399 *
2400 * Just to make our life interesting, some newer Lenovo ThinkPads have
2401 * bugs in the BIOS and may fail to update volume_toggle properly.
2402 */
2403 if (newn->mute) {
2404 /* muted */
2405 if (!oldn->mute ||
2406 oldn->volume_toggle != newn->volume_toggle ||
2407 oldn->volume_level != newn->volume_level) {
2408 /* recently muted, or repeated mute keypress, or
2409 * multiple presses ending in mute */
2410 issue_volchange(oldn->volume_level, newn->volume_level);
2411 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2412 }
2413 } else {
2414 /* unmute */
2415 if (oldn->mute) {
2416 /* recently unmuted, issue 'unmute' keypress */
2417 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2418 }
2419 if (oldn->volume_level != newn->volume_level) {
2420 issue_volchange(oldn->volume_level, newn->volume_level);
2421 } else if (oldn->volume_toggle != newn->volume_toggle) {
2422 /* repeated vol up/down keypress at end of scale ? */
2423 if (newn->volume_level == 0)
2424 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2425 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2426 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2427 }
2428 }
2429
2430 /* handle brightness */
2431 if (oldn->brightness_level != newn->brightness_level) {
2432 issue_brightnesschange(oldn->brightness_level,
2433 newn->brightness_level);
2434 } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2435 /* repeated key presses that didn't change state */
2436 if (newn->brightness_level == 0)
2437 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2438 else if (newn->brightness_level >= bright_maxlvl
2439 && !tp_features.bright_unkfw)
2440 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2441 }
2442
2443 #undef TPACPI_COMPARE_KEY
2444 #undef TPACPI_MAY_SEND_KEY
2445 }
2446
2447 /*
2448 * Polling driver
2449 *
2450 * We track all events in hotkey_source_mask all the time, since
2451 * most of them are edge-based. We only issue those requested by
2452 * hotkey_user_mask or hotkey_driver_mask, though.
2453 */
2454 static int hotkey_kthread(void *data)
2455 {
2456 struct tp_nvram_state s[2];
2457 u32 poll_mask, event_mask;
2458 unsigned int si, so;
2459 unsigned long t;
2460 unsigned int change_detector;
2461 unsigned int poll_freq;
2462 bool was_frozen;
2463
2464 mutex_lock(&hotkey_thread_mutex);
2465
2466 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2467 goto exit;
2468
2469 set_freezable();
2470
2471 so = 0;
2472 si = 1;
2473 t = 0;
2474
2475 /* Initial state for compares */
2476 mutex_lock(&hotkey_thread_data_mutex);
2477 change_detector = hotkey_config_change;
2478 poll_mask = hotkey_source_mask;
2479 event_mask = hotkey_source_mask &
2480 (hotkey_driver_mask | hotkey_user_mask);
2481 poll_freq = hotkey_poll_freq;
2482 mutex_unlock(&hotkey_thread_data_mutex);
2483 hotkey_read_nvram(&s[so], poll_mask);
2484
2485 while (!kthread_should_stop()) {
2486 if (t == 0) {
2487 if (likely(poll_freq))
2488 t = 1000/poll_freq;
2489 else
2490 t = 100; /* should never happen... */
2491 }
2492 t = msleep_interruptible(t);
2493 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2494 break;
2495
2496 if (t > 0 && !was_frozen)
2497 continue;
2498
2499 mutex_lock(&hotkey_thread_data_mutex);
2500 if (was_frozen || hotkey_config_change != change_detector) {
2501 /* forget old state on thaw or config change */
2502 si = so;
2503 t = 0;
2504 change_detector = hotkey_config_change;
2505 }
2506 poll_mask = hotkey_source_mask;
2507 event_mask = hotkey_source_mask &
2508 (hotkey_driver_mask | hotkey_user_mask);
2509 poll_freq = hotkey_poll_freq;
2510 mutex_unlock(&hotkey_thread_data_mutex);
2511
2512 if (likely(poll_mask)) {
2513 hotkey_read_nvram(&s[si], poll_mask);
2514 if (likely(si != so)) {
2515 hotkey_compare_and_issue_event(&s[so], &s[si],
2516 event_mask);
2517 }
2518 }
2519
2520 so = si;
2521 si ^= 1;
2522 }
2523
2524 exit:
2525 mutex_unlock(&hotkey_thread_mutex);
2526 return 0;
2527 }
2528
2529 /* call with hotkey_mutex held */
2530 static void hotkey_poll_stop_sync(void)
2531 {
2532 if (tpacpi_hotkey_task) {
2533 kthread_stop(tpacpi_hotkey_task);
2534 tpacpi_hotkey_task = NULL;
2535 mutex_lock(&hotkey_thread_mutex);
2536 /* at this point, the thread did exit */
2537 mutex_unlock(&hotkey_thread_mutex);
2538 }
2539 }
2540
2541 /* call with hotkey_mutex held */
2542 static void hotkey_poll_setup(const bool may_warn)
2543 {
2544 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2545 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2546
2547 if (hotkey_poll_freq > 0 &&
2548 (poll_driver_mask ||
2549 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2550 if (!tpacpi_hotkey_task) {
2551 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2552 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2553 if (IS_ERR(tpacpi_hotkey_task)) {
2554 tpacpi_hotkey_task = NULL;
2555 pr_err("could not create kernel thread "
2556 "for hotkey polling\n");
2557 }
2558 }
2559 } else {
2560 hotkey_poll_stop_sync();
2561 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2562 hotkey_poll_freq == 0) {
2563 pr_notice("hot keys 0x%08x and/or events 0x%08x "
2564 "require polling, which is currently "
2565 "disabled\n",
2566 poll_user_mask, poll_driver_mask);
2567 }
2568 }
2569 }
2570
2571 static void hotkey_poll_setup_safe(const bool may_warn)
2572 {
2573 mutex_lock(&hotkey_mutex);
2574 hotkey_poll_setup(may_warn);
2575 mutex_unlock(&hotkey_mutex);
2576 }
2577
2578 /* call with hotkey_mutex held */
2579 static void hotkey_poll_set_freq(unsigned int freq)
2580 {
2581 if (!freq)
2582 hotkey_poll_stop_sync();
2583
2584 hotkey_poll_freq = freq;
2585 }
2586
2587 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2588
2589 static void hotkey_poll_setup(const bool __unused)
2590 {
2591 }
2592
2593 static void hotkey_poll_setup_safe(const bool __unused)
2594 {
2595 }
2596
2597 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2598
2599 static int hotkey_inputdev_open(struct input_dev *dev)
2600 {
2601 switch (tpacpi_lifecycle) {
2602 case TPACPI_LIFE_INIT:
2603 case TPACPI_LIFE_RUNNING:
2604 hotkey_poll_setup_safe(false);
2605 return 0;
2606 case TPACPI_LIFE_EXITING:
2607 return -EBUSY;
2608 }
2609
2610 /* Should only happen if tpacpi_lifecycle is corrupt */
2611 BUG();
2612 return -EBUSY;
2613 }
2614
2615 static void hotkey_inputdev_close(struct input_dev *dev)
2616 {
2617 /* disable hotkey polling when possible */
2618 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2619 !(hotkey_source_mask & hotkey_driver_mask))
2620 hotkey_poll_setup_safe(false);
2621 }
2622
2623 /* sysfs hotkey enable ------------------------------------------------- */
2624 static ssize_t hotkey_enable_show(struct device *dev,
2625 struct device_attribute *attr,
2626 char *buf)
2627 {
2628 int res, status;
2629
2630 printk_deprecated_attribute("hotkey_enable",
2631 "Hotkey reporting is always enabled");
2632
2633 res = hotkey_status_get(&status);
2634 if (res)
2635 return res;
2636
2637 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2638 }
2639
2640 static ssize_t hotkey_enable_store(struct device *dev,
2641 struct device_attribute *attr,
2642 const char *buf, size_t count)
2643 {
2644 unsigned long t;
2645
2646 printk_deprecated_attribute("hotkey_enable",
2647 "Hotkeys can be disabled through hotkey_mask");
2648
2649 if (parse_strtoul(buf, 1, &t))
2650 return -EINVAL;
2651
2652 if (t == 0)
2653 return -EPERM;
2654
2655 return count;
2656 }
2657
2658 static struct device_attribute dev_attr_hotkey_enable =
2659 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2660 hotkey_enable_show, hotkey_enable_store);
2661
2662 /* sysfs hotkey mask --------------------------------------------------- */
2663 static ssize_t hotkey_mask_show(struct device *dev,
2664 struct device_attribute *attr,
2665 char *buf)
2666 {
2667 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2668 }
2669
2670 static ssize_t hotkey_mask_store(struct device *dev,
2671 struct device_attribute *attr,
2672 const char *buf, size_t count)
2673 {
2674 unsigned long t;
2675 int res;
2676
2677 if (parse_strtoul(buf, 0xffffffffUL, &t))
2678 return -EINVAL;
2679
2680 if (mutex_lock_killable(&hotkey_mutex))
2681 return -ERESTARTSYS;
2682
2683 res = hotkey_user_mask_set(t);
2684
2685 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2686 hotkey_poll_setup(true);
2687 #endif
2688
2689 mutex_unlock(&hotkey_mutex);
2690
2691 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2692
2693 return (res) ? res : count;
2694 }
2695
2696 static struct device_attribute dev_attr_hotkey_mask =
2697 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2698 hotkey_mask_show, hotkey_mask_store);
2699
2700 /* sysfs hotkey bios_enabled ------------------------------------------- */
2701 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2702 struct device_attribute *attr,
2703 char *buf)
2704 {
2705 return sprintf(buf, "0\n");
2706 }
2707
2708 static struct device_attribute dev_attr_hotkey_bios_enabled =
2709 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2710
2711 /* sysfs hotkey bios_mask ---------------------------------------------- */
2712 static ssize_t hotkey_bios_mask_show(struct device *dev,
2713 struct device_attribute *attr,
2714 char *buf)
2715 {
2716 printk_deprecated_attribute("hotkey_bios_mask",
2717 "This attribute is useless.");
2718 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2719 }
2720
2721 static struct device_attribute dev_attr_hotkey_bios_mask =
2722 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2723
2724 /* sysfs hotkey all_mask ----------------------------------------------- */
2725 static ssize_t hotkey_all_mask_show(struct device *dev,
2726 struct device_attribute *attr,
2727 char *buf)
2728 {
2729 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2730 hotkey_all_mask | hotkey_source_mask);
2731 }
2732
2733 static struct device_attribute dev_attr_hotkey_all_mask =
2734 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2735
2736 /* sysfs hotkey recommended_mask --------------------------------------- */
2737 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2738 struct device_attribute *attr,
2739 char *buf)
2740 {
2741 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2742 (hotkey_all_mask | hotkey_source_mask)
2743 & ~hotkey_reserved_mask);
2744 }
2745
2746 static struct device_attribute dev_attr_hotkey_recommended_mask =
2747 __ATTR(hotkey_recommended_mask, S_IRUGO,
2748 hotkey_recommended_mask_show, NULL);
2749
2750 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2751
2752 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2753 static ssize_t hotkey_source_mask_show(struct device *dev,
2754 struct device_attribute *attr,
2755 char *buf)
2756 {
2757 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2758 }
2759
2760 static ssize_t hotkey_source_mask_store(struct device *dev,
2761 struct device_attribute *attr,
2762 const char *buf, size_t count)
2763 {
2764 unsigned long t;
2765 u32 r_ev;
2766 int rc;
2767
2768 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2769 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2770 return -EINVAL;
2771
2772 if (mutex_lock_killable(&hotkey_mutex))
2773 return -ERESTARTSYS;
2774
2775 HOTKEY_CONFIG_CRITICAL_START
2776 hotkey_source_mask = t;
2777 HOTKEY_CONFIG_CRITICAL_END
2778
2779 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2780 ~hotkey_source_mask);
2781 hotkey_poll_setup(true);
2782
2783 /* check if events needed by the driver got disabled */
2784 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2785 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2786
2787 mutex_unlock(&hotkey_mutex);
2788
2789 if (rc < 0)
2790 pr_err("hotkey_source_mask: "
2791 "failed to update the firmware event mask!\n");
2792
2793 if (r_ev)
2794 pr_notice("hotkey_source_mask: "
2795 "some important events were disabled: 0x%04x\n",
2796 r_ev);
2797
2798 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2799
2800 return (rc < 0) ? rc : count;
2801 }
2802
2803 static struct device_attribute dev_attr_hotkey_source_mask =
2804 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2805 hotkey_source_mask_show, hotkey_source_mask_store);
2806
2807 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2808 static ssize_t hotkey_poll_freq_show(struct device *dev,
2809 struct device_attribute *attr,
2810 char *buf)
2811 {
2812 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2813 }
2814
2815 static ssize_t hotkey_poll_freq_store(struct device *dev,
2816 struct device_attribute *attr,
2817 const char *buf, size_t count)
2818 {
2819 unsigned long t;
2820
2821 if (parse_strtoul(buf, 25, &t))
2822 return -EINVAL;
2823
2824 if (mutex_lock_killable(&hotkey_mutex))
2825 return -ERESTARTSYS;
2826
2827 hotkey_poll_set_freq(t);
2828 hotkey_poll_setup(true);
2829
2830 mutex_unlock(&hotkey_mutex);
2831
2832 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2833
2834 return count;
2835 }
2836
2837 static struct device_attribute dev_attr_hotkey_poll_freq =
2838 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2839 hotkey_poll_freq_show, hotkey_poll_freq_store);
2840
2841 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2842
2843 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2844 static ssize_t hotkey_radio_sw_show(struct device *dev,
2845 struct device_attribute *attr,
2846 char *buf)
2847 {
2848 int res;
2849 res = hotkey_get_wlsw();
2850 if (res < 0)
2851 return res;
2852
2853 /* Opportunistic update */
2854 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2855
2856 return snprintf(buf, PAGE_SIZE, "%d\n",
2857 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2858 }
2859
2860 static struct device_attribute dev_attr_hotkey_radio_sw =
2861 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2862
2863 static void hotkey_radio_sw_notify_change(void)
2864 {
2865 if (tp_features.hotkey_wlsw)
2866 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2867 "hotkey_radio_sw");
2868 }
2869
2870 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2871 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2872 struct device_attribute *attr,
2873 char *buf)
2874 {
2875 int res, s;
2876 res = hotkey_get_tablet_mode(&s);
2877 if (res < 0)
2878 return res;
2879
2880 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2881 }
2882
2883 static struct device_attribute dev_attr_hotkey_tablet_mode =
2884 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
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 hotkey report_mode -------------------------------------------- */
2894 static ssize_t hotkey_report_mode_show(struct device *dev,
2895 struct device_attribute *attr,
2896 char *buf)
2897 {
2898 return snprintf(buf, PAGE_SIZE, "%d\n",
2899 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2900 }
2901
2902 static struct device_attribute dev_attr_hotkey_report_mode =
2903 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2904
2905 /* sysfs wakeup reason (pollable) -------------------------------------- */
2906 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2907 struct device_attribute *attr,
2908 char *buf)
2909 {
2910 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2911 }
2912
2913 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2914 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2915
2916 static void hotkey_wakeup_reason_notify_change(void)
2917 {
2918 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2919 "wakeup_reason");
2920 }
2921
2922 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2923 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2924 struct device_attribute *attr,
2925 char *buf)
2926 {
2927 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2928 }
2929
2930 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2931 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2932 hotkey_wakeup_hotunplug_complete_show, NULL);
2933
2934 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2935 {
2936 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2937 "wakeup_hotunplug_complete");
2938 }
2939
2940 /* --------------------------------------------------------------------- */
2941
2942 static struct attribute *hotkey_attributes[] __initdata = {
2943 &dev_attr_hotkey_enable.attr,
2944 &dev_attr_hotkey_bios_enabled.attr,
2945 &dev_attr_hotkey_bios_mask.attr,
2946 &dev_attr_hotkey_report_mode.attr,
2947 &dev_attr_hotkey_wakeup_reason.attr,
2948 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2949 &dev_attr_hotkey_mask.attr,
2950 &dev_attr_hotkey_all_mask.attr,
2951 &dev_attr_hotkey_recommended_mask.attr,
2952 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2953 &dev_attr_hotkey_source_mask.attr,
2954 &dev_attr_hotkey_poll_freq.attr,
2955 #endif
2956 };
2957
2958 /*
2959 * Sync both the hw and sw blocking state of all switches
2960 */
2961 static void tpacpi_send_radiosw_update(void)
2962 {
2963 int wlsw;
2964
2965 /*
2966 * We must sync all rfkill controllers *before* issuing any
2967 * rfkill input events, or we will race the rfkill core input
2968 * handler.
2969 *
2970 * tpacpi_inputdev_send_mutex works as a synchronization point
2971 * for the above.
2972 *
2973 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2974 */
2975
2976 wlsw = hotkey_get_wlsw();
2977
2978 /* Sync hw blocking state first if it is hw-blocked */
2979 if (wlsw == TPACPI_RFK_RADIO_OFF)
2980 tpacpi_rfk_update_hwblock_state(true);
2981
2982 /* Sync sw blocking state */
2983 tpacpi_rfk_update_swstate_all();
2984
2985 /* Sync hw blocking state last if it is hw-unblocked */
2986 if (wlsw == TPACPI_RFK_RADIO_ON)
2987 tpacpi_rfk_update_hwblock_state(false);
2988
2989 /* Issue rfkill input event for WLSW switch */
2990 if (!(wlsw < 0)) {
2991 mutex_lock(&tpacpi_inputdev_send_mutex);
2992
2993 input_report_switch(tpacpi_inputdev,
2994 SW_RFKILL_ALL, (wlsw > 0));
2995 input_sync(tpacpi_inputdev);
2996
2997 mutex_unlock(&tpacpi_inputdev_send_mutex);
2998 }
2999
3000 /*
3001 * this can be unconditional, as we will poll state again
3002 * if userspace uses the notify to read data
3003 */
3004 hotkey_radio_sw_notify_change();
3005 }
3006
3007 static void hotkey_exit(void)
3008 {
3009 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3010 mutex_lock(&hotkey_mutex);
3011 hotkey_poll_stop_sync();
3012 mutex_unlock(&hotkey_mutex);
3013 #endif
3014
3015 if (hotkey_dev_attributes)
3016 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3017
3018 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3019 "restoring original HKEY status and mask\n");
3020 /* yes, there is a bitwise or below, we want the
3021 * functions to be called even if one of them fail */
3022 if (((tp_features.hotkey_mask &&
3023 hotkey_mask_set(hotkey_orig_mask)) |
3024 hotkey_status_set(false)) != 0)
3025 pr_err("failed to restore hot key mask "
3026 "to BIOS defaults\n");
3027 }
3028
3029 static void __init hotkey_unmap(const unsigned int scancode)
3030 {
3031 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3032 clear_bit(hotkey_keycode_map[scancode],
3033 tpacpi_inputdev->keybit);
3034 hotkey_keycode_map[scancode] = KEY_RESERVED;
3035 }
3036 }
3037
3038 /*
3039 * HKEY quirks:
3040 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3041 */
3042
3043 #define TPACPI_HK_Q_INIMASK 0x0001
3044
3045 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3046 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3047 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3048 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3049 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3050 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3051 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3052 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3053 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3054 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3055 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3056 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3057 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3058 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3059 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3060 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3061 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3062 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3063 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3064 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3065 };
3066
3067 typedef u16 tpacpi_keymap_entry_t;
3068 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3069
3070 static int __init hotkey_init(struct ibm_init_struct *iibm)
3071 {
3072 /* Requirements for changing the default keymaps:
3073 *
3074 * 1. Many of the keys are mapped to KEY_RESERVED for very
3075 * good reasons. Do not change them unless you have deep
3076 * knowledge on the IBM and Lenovo ThinkPad firmware for
3077 * the various ThinkPad models. The driver behaves
3078 * differently for KEY_RESERVED: such keys have their
3079 * hot key mask *unset* in mask_recommended, and also
3080 * in the initial hot key mask programmed into the
3081 * firmware at driver load time, which means the firm-
3082 * ware may react very differently if you change them to
3083 * something else;
3084 *
3085 * 2. You must be subscribed to the linux-thinkpad and
3086 * ibm-acpi-devel mailing lists, and you should read the
3087 * list archives since 2007 if you want to change the
3088 * keymaps. This requirement exists so that you will
3089 * know the past history of problems with the thinkpad-
3090 * acpi driver keymaps, and also that you will be
3091 * listening to any bug reports;
3092 *
3093 * 3. Do not send thinkpad-acpi specific patches directly to
3094 * for merging, *ever*. Send them to the linux-acpi
3095 * mailinglist for comments. Merging is to be done only
3096 * through acpi-test and the ACPI maintainer.
3097 *
3098 * If the above is too much to ask, don't change the keymap.
3099 * Ask the thinkpad-acpi maintainer to do it, instead.
3100 */
3101
3102 enum keymap_index {
3103 TPACPI_KEYMAP_IBM_GENERIC = 0,
3104 TPACPI_KEYMAP_LENOVO_GENERIC,
3105 };
3106
3107 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3108 /* Generic keymap for IBM ThinkPads */
3109 [TPACPI_KEYMAP_IBM_GENERIC] = {
3110 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3111 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP,
3112 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3113 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3114
3115 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3116 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3117 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3118 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3119
3120 /* brightness: firmware always reacts to them */
3121 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3122 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3123
3124 /* Thinklight: firmware always react to it */
3125 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3126
3127 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3128 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3129
3130 /* Volume: firmware always react to it and reprograms
3131 * the built-in *extra* mixer. Never map it to control
3132 * another mixer by default. */
3133 KEY_RESERVED, /* 0x14: VOLUME UP */
3134 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3135 KEY_RESERVED, /* 0x16: MUTE */
3136
3137 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3138
3139 /* (assignments unknown, please report if found) */
3140 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3141 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3142 },
3143
3144 /* Generic keymap for Lenovo ThinkPads */
3145 [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3146 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3147 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3148 KEY_WLAN, KEY_CAMERA, 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 /* These should be enabled --only-- when ACPI video
3157 * is disabled (i.e. in "vendor" mode), and are handled
3158 * in a special way by the init code */
3159 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3160 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3161
3162 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3163
3164 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3165 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3166
3167 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3168 * react to it and reprograms the built-in *extra* mixer.
3169 * Never map it to control another mixer by default.
3170 *
3171 * T60?, T61, R60?, R61: firmware and EC tries to send
3172 * these over the regular keyboard, so these are no-ops,
3173 * but there are still weird bugs re. MUTE, so do not
3174 * change unless you get test reports from all Lenovo
3175 * models. May cause the BIOS to interfere with the
3176 * HDA mixer.
3177 */
3178 KEY_RESERVED, /* 0x14: VOLUME UP */
3179 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3180 KEY_RESERVED, /* 0x16: MUTE */
3181
3182 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3183
3184 /* (assignments unknown, please report if found) */
3185 KEY_UNKNOWN, KEY_UNKNOWN,
3186
3187 /*
3188 * The mic mute button only sends 0x1a. It does not
3189 * automatically mute the mic or change the mute light.
3190 */
3191 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */
3192
3193 /* (assignments unknown, please report if found) */
3194 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3195 KEY_UNKNOWN,
3196 },
3197 };
3198
3199 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3200 /* Generic maps (fallback) */
3201 {
3202 .vendor = PCI_VENDOR_ID_IBM,
3203 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3204 .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3205 },
3206 {
3207 .vendor = PCI_VENDOR_ID_LENOVO,
3208 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3209 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3210 },
3211 };
3212
3213 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t)
3214 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t)
3215
3216 int res, i;
3217 int status;
3218 int hkeyv;
3219 bool radiosw_state = false;
3220 bool tabletsw_state = false;
3221
3222 unsigned long quirks;
3223 unsigned long keymap_id;
3224
3225 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3226 "initializing hotkey subdriver\n");
3227
3228 BUG_ON(!tpacpi_inputdev);
3229 BUG_ON(tpacpi_inputdev->open != NULL ||
3230 tpacpi_inputdev->close != NULL);
3231
3232 TPACPI_ACPIHANDLE_INIT(hkey);
3233 mutex_init(&hotkey_mutex);
3234
3235 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3236 mutex_init(&hotkey_thread_mutex);
3237 mutex_init(&hotkey_thread_data_mutex);
3238 #endif
3239
3240 /* hotkey not supported on 570 */
3241 tp_features.hotkey = hkey_handle != NULL;
3242
3243 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3244 "hotkeys are %s\n",
3245 str_supported(tp_features.hotkey));
3246
3247 if (!tp_features.hotkey)
3248 return 1;
3249
3250 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3251 ARRAY_SIZE(tpacpi_hotkey_qtable));
3252
3253 tpacpi_disable_brightness_delay();
3254
3255 /* MUST have enough space for all attributes to be added to
3256 * hotkey_dev_attributes */
3257 hotkey_dev_attributes = create_attr_set(
3258 ARRAY_SIZE(hotkey_attributes) + 2,
3259 NULL);
3260 if (!hotkey_dev_attributes)
3261 return -ENOMEM;
3262 res = add_many_to_attr_set(hotkey_dev_attributes,
3263 hotkey_attributes,
3264 ARRAY_SIZE(hotkey_attributes));
3265 if (res)
3266 goto err_exit;
3267
3268 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3269 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3270 for HKEY interface version 0x100 */
3271 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3272 if ((hkeyv >> 8) != 1) {
3273 pr_err("unknown version of the HKEY interface: 0x%x\n",
3274 hkeyv);
3275 pr_err("please report this to %s\n", TPACPI_MAIL);
3276 } else {
3277 /*
3278 * MHKV 0x100 in A31, R40, R40e,
3279 * T4x, X31, and later
3280 */
3281 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3282 "firmware HKEY interface version: 0x%x\n",
3283 hkeyv);
3284
3285 /* Paranoia check AND init hotkey_all_mask */
3286 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3287 "MHKA", "qd")) {
3288 pr_err("missing MHKA handler, "
3289 "please report this to %s\n",
3290 TPACPI_MAIL);
3291 /* Fallback: pre-init for FN+F3,F4,F12 */
3292 hotkey_all_mask = 0x080cU;
3293 } else {
3294 tp_features.hotkey_mask = 1;
3295 }
3296 }
3297 }
3298
3299 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3300 "hotkey masks are %s\n",
3301 str_supported(tp_features.hotkey_mask));
3302
3303 /* Init hotkey_all_mask if not initialized yet */
3304 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3305 (quirks & TPACPI_HK_Q_INIMASK))
3306 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3307
3308 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3309 if (tp_features.hotkey_mask) {
3310 /* hotkey_source_mask *must* be zero for
3311 * the first hotkey_mask_get to return hotkey_orig_mask */
3312 res = hotkey_mask_get();
3313 if (res)
3314 goto err_exit;
3315
3316 hotkey_orig_mask = hotkey_acpi_mask;
3317 } else {
3318 hotkey_orig_mask = hotkey_all_mask;
3319 hotkey_acpi_mask = hotkey_all_mask;
3320 }
3321
3322 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3323 if (dbg_wlswemul) {
3324 tp_features.hotkey_wlsw = 1;
3325 radiosw_state = !!tpacpi_wlsw_emulstate;
3326 pr_info("radio switch emulation enabled\n");
3327 } else
3328 #endif
3329 /* Not all thinkpads have a hardware radio switch */
3330 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3331 tp_features.hotkey_wlsw = 1;
3332 radiosw_state = !!status;
3333 pr_info("radio switch found; radios are %s\n",
3334 enabled(status, 0));
3335 }
3336 if (tp_features.hotkey_wlsw)
3337 res = add_to_attr_set(hotkey_dev_attributes,
3338 &dev_attr_hotkey_radio_sw.attr);
3339
3340 /* For X41t, X60t, X61t Tablets... */
3341 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3342 tp_features.hotkey_tablet = 1;
3343 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3344 pr_info("possible tablet mode switch found; "
3345 "ThinkPad in %s mode\n",
3346 (tabletsw_state) ? "tablet" : "laptop");
3347 res = add_to_attr_set(hotkey_dev_attributes,
3348 &dev_attr_hotkey_tablet_mode.attr);
3349 }
3350
3351 if (!res)
3352 res = register_attr_set_with_sysfs(
3353 hotkey_dev_attributes,
3354 &tpacpi_pdev->dev.kobj);
3355 if (res)
3356 goto err_exit;
3357
3358 /* Set up key map */
3359 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3360 GFP_KERNEL);
3361 if (!hotkey_keycode_map) {
3362 pr_err("failed to allocate memory for key map\n");
3363 res = -ENOMEM;
3364 goto err_exit;
3365 }
3366
3367 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3368 ARRAY_SIZE(tpacpi_keymap_qtable));
3369 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3370 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3371 "using keymap number %lu\n", keymap_id);
3372
3373 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3374 TPACPI_HOTKEY_MAP_SIZE);
3375
3376 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3377 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3378 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3379 tpacpi_inputdev->keycode = hotkey_keycode_map;
3380 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3381 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3382 input_set_capability(tpacpi_inputdev, EV_KEY,
3383 hotkey_keycode_map[i]);
3384 } else {
3385 if (i < sizeof(hotkey_reserved_mask)*8)
3386 hotkey_reserved_mask |= 1 << i;
3387 }
3388 }
3389
3390 if (tp_features.hotkey_wlsw) {
3391 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3392 input_report_switch(tpacpi_inputdev,
3393 SW_RFKILL_ALL, radiosw_state);
3394 }
3395 if (tp_features.hotkey_tablet) {
3396 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3397 input_report_switch(tpacpi_inputdev,
3398 SW_TABLET_MODE, tabletsw_state);
3399 }
3400
3401 /* Do not issue duplicate brightness change events to
3402 * userspace. tpacpi_detect_brightness_capabilities() must have
3403 * been called before this point */
3404 if (acpi_video_backlight_support()) {
3405 pr_info("This ThinkPad has standard ACPI backlight "
3406 "brightness control, supported by the ACPI "
3407 "video driver\n");
3408 pr_notice("Disabling thinkpad-acpi brightness events "
3409 "by default...\n");
3410
3411 /* Disable brightness up/down on Lenovo thinkpads when
3412 * ACPI is handling them, otherwise it is plain impossible
3413 * for userspace to do something even remotely sane */
3414 hotkey_reserved_mask |=
3415 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3416 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3417 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3418 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3419 }
3420
3421 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3422 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3423 & ~hotkey_all_mask
3424 & ~hotkey_reserved_mask;
3425
3426 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3427 "hotkey source mask 0x%08x, polling freq %u\n",
3428 hotkey_source_mask, hotkey_poll_freq);
3429 #endif
3430
3431 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3432 "enabling firmware HKEY event interface...\n");
3433 res = hotkey_status_set(true);
3434 if (res) {
3435 hotkey_exit();
3436 return res;
3437 }
3438 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3439 | hotkey_driver_mask)
3440 & ~hotkey_source_mask);
3441 if (res < 0 && res != -ENXIO) {
3442 hotkey_exit();
3443 return res;
3444 }
3445 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3446 & ~hotkey_reserved_mask;
3447 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3448 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3449 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3450
3451 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3452 "legacy ibm/hotkey event reporting over procfs %s\n",
3453 (hotkey_report_mode < 2) ?
3454 "enabled" : "disabled");
3455
3456 tpacpi_inputdev->open = &hotkey_inputdev_open;
3457 tpacpi_inputdev->close = &hotkey_inputdev_close;
3458
3459 hotkey_poll_setup_safe(true);
3460
3461 return 0;
3462
3463 err_exit:
3464 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3465 hotkey_dev_attributes = NULL;
3466
3467 return (res < 0)? res : 1;
3468 }
3469
3470 static bool hotkey_notify_hotkey(const u32 hkey,
3471 bool *send_acpi_ev,
3472 bool *ignore_acpi_ev)
3473 {
3474 /* 0x1000-0x1FFF: key presses */
3475 unsigned int scancode = hkey & 0xfff;
3476 *send_acpi_ev = true;
3477 *ignore_acpi_ev = false;
3478
3479 /* HKEY event 0x1001 is scancode 0x00 */
3480 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3481 scancode--;
3482 if (!(hotkey_source_mask & (1 << scancode))) {
3483 tpacpi_input_send_key_masked(scancode);
3484 *send_acpi_ev = false;
3485 } else {
3486 *ignore_acpi_ev = true;
3487 }
3488 return true;
3489 }
3490 return false;
3491 }
3492
3493 static bool hotkey_notify_wakeup(const u32 hkey,
3494 bool *send_acpi_ev,
3495 bool *ignore_acpi_ev)
3496 {
3497 /* 0x2000-0x2FFF: Wakeup reason */
3498 *send_acpi_ev = true;
3499 *ignore_acpi_ev = false;
3500
3501 switch (hkey) {
3502 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3503 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3504 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3505 *ignore_acpi_ev = true;
3506 break;
3507
3508 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3509 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3510 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3511 *ignore_acpi_ev = true;
3512 break;
3513
3514 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3515 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3516 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3517 /* how to auto-heal: */
3518 /* 2313: woke up from S3, go to S4/S5 */
3519 /* 2413: woke up from S4, go to S5 */
3520 break;
3521
3522 default:
3523 return false;
3524 }
3525
3526 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3527 pr_info("woke up due to a hot-unplug request...\n");
3528 hotkey_wakeup_reason_notify_change();
3529 }
3530 return true;
3531 }
3532
3533 static bool hotkey_notify_dockevent(const u32 hkey,
3534 bool *send_acpi_ev,
3535 bool *ignore_acpi_ev)
3536 {
3537 /* 0x4000-0x4FFF: dock-related events */
3538 *send_acpi_ev = true;
3539 *ignore_acpi_ev = false;
3540
3541 switch (hkey) {
3542 case TP_HKEY_EV_UNDOCK_ACK:
3543 /* ACPI undock operation completed after wakeup */
3544 hotkey_autosleep_ack = 1;
3545 pr_info("undocked\n");
3546 hotkey_wakeup_hotunplug_complete_notify_change();
3547 return true;
3548
3549 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3550 pr_info("docked into hotplug port replicator\n");
3551 return true;
3552 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3553 pr_info("undocked from hotplug port replicator\n");
3554 return true;
3555
3556 default:
3557 return false;
3558 }
3559 }
3560
3561 static bool hotkey_notify_usrevent(const u32 hkey,
3562 bool *send_acpi_ev,
3563 bool *ignore_acpi_ev)
3564 {
3565 /* 0x5000-0x5FFF: human interface helpers */
3566 *send_acpi_ev = true;
3567 *ignore_acpi_ev = false;
3568
3569 switch (hkey) {
3570 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3571 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3572 return true;
3573
3574 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3575 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3576 tpacpi_input_send_tabletsw();
3577 hotkey_tablet_mode_notify_change();
3578 *send_acpi_ev = false;
3579 return true;
3580
3581 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3582 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3583 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3584 /* do not propagate these events */
3585 *ignore_acpi_ev = true;
3586 return true;
3587
3588 default:
3589 return false;
3590 }
3591 }
3592
3593 static void thermal_dump_all_sensors(void);
3594
3595 static bool hotkey_notify_6xxx(const u32 hkey,
3596 bool *send_acpi_ev,
3597 bool *ignore_acpi_ev)
3598 {
3599 bool known = true;
3600
3601 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3602 *send_acpi_ev = true;
3603 *ignore_acpi_ev = false;
3604
3605 switch (hkey) {
3606 case TP_HKEY_EV_THM_TABLE_CHANGED:
3607 pr_info("EC reports that Thermal Table has changed\n");
3608 /* recommended action: do nothing, we don't have
3609 * Lenovo ATM information */
3610 return true;
3611 case TP_HKEY_EV_ALARM_BAT_HOT:
3612 pr_crit("THERMAL ALARM: battery is too hot!\n");
3613 /* recommended action: warn user through gui */
3614 break;
3615 case TP_HKEY_EV_ALARM_BAT_XHOT:
3616 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3617 /* recommended action: immediate sleep/hibernate */
3618 break;
3619 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3620 pr_crit("THERMAL ALARM: "
3621 "a sensor reports something is too hot!\n");
3622 /* recommended action: warn user through gui, that */
3623 /* some internal component is too hot */
3624 break;
3625 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3626 pr_alert("THERMAL EMERGENCY: "
3627 "a sensor reports something is extremely hot!\n");
3628 /* recommended action: immediate sleep/hibernate */
3629 break;
3630
3631 case TP_HKEY_EV_KEY_NUMLOCK:
3632 case TP_HKEY_EV_KEY_FN:
3633 /* key press events, we just ignore them as long as the EC
3634 * is still reporting them in the normal keyboard stream */
3635 *send_acpi_ev = false;
3636 *ignore_acpi_ev = true;
3637 return true;
3638
3639 default:
3640 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3641 known = false;
3642 }
3643
3644 thermal_dump_all_sensors();
3645
3646 return known;
3647 }
3648
3649 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3650 {
3651 u32 hkey;
3652 bool send_acpi_ev;
3653 bool ignore_acpi_ev;
3654 bool known_ev;
3655
3656 if (event != 0x80) {
3657 pr_err("unknown HKEY notification event %d\n", event);
3658 /* forward it to userspace, maybe it knows how to handle it */
3659 acpi_bus_generate_netlink_event(
3660 ibm->acpi->device->pnp.device_class,
3661 dev_name(&ibm->acpi->device->dev),
3662 event, 0);
3663 return;
3664 }
3665
3666 while (1) {
3667 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3668 pr_err("failed to retrieve HKEY event\n");
3669 return;
3670 }
3671
3672 if (hkey == 0) {
3673 /* queue empty */
3674 return;
3675 }
3676
3677 send_acpi_ev = true;
3678 ignore_acpi_ev = false;
3679
3680 switch (hkey >> 12) {
3681 case 1:
3682 /* 0x1000-0x1FFF: key presses */
3683 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3684 &ignore_acpi_ev);
3685 break;
3686 case 2:
3687 /* 0x2000-0x2FFF: Wakeup reason */
3688 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3689 &ignore_acpi_ev);
3690 break;
3691 case 3:
3692 /* 0x3000-0x3FFF: bay-related wakeups */
3693 switch (hkey) {
3694 case TP_HKEY_EV_BAYEJ_ACK:
3695 hotkey_autosleep_ack = 1;
3696 pr_info("bay ejected\n");
3697 hotkey_wakeup_hotunplug_complete_notify_change();
3698 known_ev = true;
3699 break;
3700 case TP_HKEY_EV_OPTDRV_EJ:
3701 /* FIXME: kick libata if SATA link offline */
3702 known_ev = true;
3703 break;
3704 default:
3705 known_ev = false;
3706 }
3707 break;
3708 case 4:
3709 /* 0x4000-0x4FFF: dock-related events */
3710 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3711 &ignore_acpi_ev);
3712 break;
3713 case 5:
3714 /* 0x5000-0x5FFF: human interface helpers */
3715 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3716 &ignore_acpi_ev);
3717 break;
3718 case 6:
3719 /* 0x6000-0x6FFF: thermal alarms/notices and
3720 * keyboard events */
3721 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3722 &ignore_acpi_ev);
3723 break;
3724 case 7:
3725 /* 0x7000-0x7FFF: misc */
3726 if (tp_features.hotkey_wlsw &&
3727 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3728 tpacpi_send_radiosw_update();
3729 send_acpi_ev = 0;
3730 known_ev = true;
3731 break;
3732 }
3733 /* fallthrough to default */
3734 default:
3735 known_ev = false;
3736 }
3737 if (!known_ev) {
3738 pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3739 pr_notice("please report the conditions when this "
3740 "event happened to %s\n", TPACPI_MAIL);
3741 }
3742
3743 /* Legacy events */
3744 if (!ignore_acpi_ev &&
3745 (send_acpi_ev || hotkey_report_mode < 2)) {
3746 acpi_bus_generate_proc_event(ibm->acpi->device,
3747 event, hkey);
3748 }
3749
3750 /* netlink events */
3751 if (!ignore_acpi_ev && send_acpi_ev) {
3752 acpi_bus_generate_netlink_event(
3753 ibm->acpi->device->pnp.device_class,
3754 dev_name(&ibm->acpi->device->dev),
3755 event, hkey);
3756 }
3757 }
3758 }
3759
3760 static void hotkey_suspend(void)
3761 {
3762 /* Do these on suspend, we get the events on early resume! */
3763 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3764 hotkey_autosleep_ack = 0;
3765 }
3766
3767 static void hotkey_resume(void)
3768 {
3769 tpacpi_disable_brightness_delay();
3770
3771 if (hotkey_status_set(true) < 0 ||
3772 hotkey_mask_set(hotkey_acpi_mask) < 0)
3773 pr_err("error while attempting to reset the event "
3774 "firmware interface\n");
3775
3776 tpacpi_send_radiosw_update();
3777 hotkey_tablet_mode_notify_change();
3778 hotkey_wakeup_reason_notify_change();
3779 hotkey_wakeup_hotunplug_complete_notify_change();
3780 hotkey_poll_setup_safe(false);
3781 }
3782
3783 /* procfs -------------------------------------------------------------- */
3784 static int hotkey_read(struct seq_file *m)
3785 {
3786 int res, status;
3787
3788 if (!tp_features.hotkey) {
3789 seq_printf(m, "status:\t\tnot supported\n");
3790 return 0;
3791 }
3792
3793 if (mutex_lock_killable(&hotkey_mutex))
3794 return -ERESTARTSYS;
3795 res = hotkey_status_get(&status);
3796 if (!res)
3797 res = hotkey_mask_get();
3798 mutex_unlock(&hotkey_mutex);
3799 if (res)
3800 return res;
3801
3802 seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3803 if (hotkey_all_mask) {
3804 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3805 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3806 } else {
3807 seq_printf(m, "mask:\t\tnot supported\n");
3808 seq_printf(m, "commands:\tenable, disable, reset\n");
3809 }
3810
3811 return 0;
3812 }
3813
3814 static void hotkey_enabledisable_warn(bool enable)
3815 {
3816 tpacpi_log_usertask("procfs hotkey enable/disable");
3817 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3818 pr_fmt("hotkey enable/disable functionality has been "
3819 "removed from the driver. "
3820 "Hotkeys are always enabled.\n")))
3821 pr_err("Please remove the hotkey=enable module "
3822 "parameter, it is deprecated. "
3823 "Hotkeys are always enabled.\n");
3824 }
3825
3826 static int hotkey_write(char *buf)
3827 {
3828 int res;
3829 u32 mask;
3830 char *cmd;
3831
3832 if (!tp_features.hotkey)
3833 return -ENODEV;
3834
3835 if (mutex_lock_killable(&hotkey_mutex))
3836 return -ERESTARTSYS;
3837
3838 mask = hotkey_user_mask;
3839
3840 res = 0;
3841 while ((cmd = next_cmd(&buf))) {
3842 if (strlencmp(cmd, "enable") == 0) {
3843 hotkey_enabledisable_warn(1);
3844 } else if (strlencmp(cmd, "disable") == 0) {
3845 hotkey_enabledisable_warn(0);
3846 res = -EPERM;
3847 } else if (strlencmp(cmd, "reset") == 0) {
3848 mask = (hotkey_all_mask | hotkey_source_mask)
3849 & ~hotkey_reserved_mask;
3850 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3851 /* mask set */
3852 } else if (sscanf(cmd, "%x", &mask) == 1) {
3853 /* mask set */
3854 } else {
3855 res = -EINVAL;
3856 goto errexit;
3857 }
3858 }
3859
3860 if (!res) {
3861 tpacpi_disclose_usertask("procfs hotkey",
3862 "set mask to 0x%08x\n", mask);
3863 res = hotkey_user_mask_set(mask);
3864 }
3865
3866 errexit:
3867 mutex_unlock(&hotkey_mutex);
3868 return res;
3869 }
3870
3871 static const struct acpi_device_id ibm_htk_device_ids[] = {
3872 {TPACPI_ACPI_IBM_HKEY_HID, 0},
3873 {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3874 {"", 0},
3875 };
3876
3877 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3878 .hid = ibm_htk_device_ids,
3879 .notify = hotkey_notify,
3880 .handle = &hkey_handle,
3881 .type = ACPI_DEVICE_NOTIFY,
3882 };
3883
3884 static struct ibm_struct hotkey_driver_data = {
3885 .name = "hotkey",
3886 .read = hotkey_read,
3887 .write = hotkey_write,
3888 .exit = hotkey_exit,
3889 .resume = hotkey_resume,
3890 .suspend = hotkey_suspend,
3891 .acpi = &ibm_hotkey_acpidriver,
3892 };
3893
3894 /*************************************************************************
3895 * Bluetooth subdriver
3896 */
3897
3898 enum {
3899 /* ACPI GBDC/SBDC bits */
3900 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3901 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3902 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3903 0 = disable, 1 = enable */
3904 };
3905
3906 enum {
3907 /* ACPI \BLTH commands */
3908 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3909 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3910 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3911 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3912 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3913 };
3914
3915 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3916
3917 static int bluetooth_get_status(void)
3918 {
3919 int status;
3920
3921 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3922 if (dbg_bluetoothemul)
3923 return (tpacpi_bluetooth_emulstate) ?
3924 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3925 #endif
3926
3927 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3928 return -EIO;
3929
3930 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3931 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3932 }
3933
3934 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3935 {
3936 int status;
3937
3938 vdbg_printk(TPACPI_DBG_RFKILL,
3939 "will attempt to %s bluetooth\n",
3940 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3941
3942 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3943 if (dbg_bluetoothemul) {
3944 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3945 return 0;
3946 }
3947 #endif
3948
3949 if (state == TPACPI_RFK_RADIO_ON)
3950 status = TP_ACPI_BLUETOOTH_RADIOSSW
3951 | TP_ACPI_BLUETOOTH_RESUMECTRL;
3952 else
3953 status = 0;
3954
3955 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3956 return -EIO;
3957
3958 return 0;
3959 }
3960
3961 /* sysfs bluetooth enable ---------------------------------------------- */
3962 static ssize_t bluetooth_enable_show(struct device *dev,
3963 struct device_attribute *attr,
3964 char *buf)
3965 {
3966 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3967 attr, buf);
3968 }
3969
3970 static ssize_t bluetooth_enable_store(struct device *dev,
3971 struct device_attribute *attr,
3972 const char *buf, size_t count)
3973 {
3974 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3975 attr, buf, count);
3976 }
3977
3978 static struct device_attribute dev_attr_bluetooth_enable =
3979 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3980 bluetooth_enable_show, bluetooth_enable_store);
3981
3982 /* --------------------------------------------------------------------- */
3983
3984 static struct attribute *bluetooth_attributes[] = {
3985 &dev_attr_bluetooth_enable.attr,
3986 NULL
3987 };
3988
3989 static const struct attribute_group bluetooth_attr_group = {
3990 .attrs = bluetooth_attributes,
3991 };
3992
3993 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3994 .get_status = bluetooth_get_status,
3995 .set_status = bluetooth_set_status,
3996 };
3997
3998 static void bluetooth_shutdown(void)
3999 {
4000 /* Order firmware to save current state to NVRAM */
4001 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4002 TP_ACPI_BLTH_SAVE_STATE))
4003 pr_notice("failed to save bluetooth state to NVRAM\n");
4004 else
4005 vdbg_printk(TPACPI_DBG_RFKILL,
4006 "bluetooth state saved to NVRAM\n");
4007 }
4008
4009 static void bluetooth_exit(void)
4010 {
4011 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4012 &bluetooth_attr_group);
4013
4014 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4015
4016 bluetooth_shutdown();
4017 }
4018
4019 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4020 {
4021 int res;
4022 int status = 0;
4023
4024 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4025 "initializing bluetooth subdriver\n");
4026
4027 TPACPI_ACPIHANDLE_INIT(hkey);
4028
4029 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4030 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4031 tp_features.bluetooth = hkey_handle &&
4032 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4033
4034 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4035 "bluetooth is %s, status 0x%02x\n",
4036 str_supported(tp_features.bluetooth),
4037 status);
4038
4039 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4040 if (dbg_bluetoothemul) {
4041 tp_features.bluetooth = 1;
4042 pr_info("bluetooth switch emulation enabled\n");
4043 } else
4044 #endif
4045 if (tp_features.bluetooth &&
4046 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4047 /* no bluetooth hardware present in system */
4048 tp_features.bluetooth = 0;
4049 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4050 "bluetooth hardware not installed\n");
4051 }
4052
4053 if (!tp_features.bluetooth)
4054 return 1;
4055
4056 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4057 &bluetooth_tprfk_ops,
4058 RFKILL_TYPE_BLUETOOTH,
4059 TPACPI_RFK_BLUETOOTH_SW_NAME,
4060 true);
4061 if (res)
4062 return res;
4063
4064 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4065 &bluetooth_attr_group);
4066 if (res) {
4067 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4068 return res;
4069 }
4070
4071 return 0;
4072 }
4073
4074 /* procfs -------------------------------------------------------------- */
4075 static int bluetooth_read(struct seq_file *m)
4076 {
4077 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4078 }
4079
4080 static int bluetooth_write(char *buf)
4081 {
4082 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4083 }
4084
4085 static struct ibm_struct bluetooth_driver_data = {
4086 .name = "bluetooth",
4087 .read = bluetooth_read,
4088 .write = bluetooth_write,
4089 .exit = bluetooth_exit,
4090 .shutdown = bluetooth_shutdown,
4091 };
4092
4093 /*************************************************************************
4094 * Wan subdriver
4095 */
4096
4097 enum {
4098 /* ACPI GWAN/SWAN bits */
4099 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4100 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4101 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4102 0 = disable, 1 = enable */
4103 };
4104
4105 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4106
4107 static int wan_get_status(void)
4108 {
4109 int status;
4110
4111 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4112 if (dbg_wwanemul)
4113 return (tpacpi_wwan_emulstate) ?
4114 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4115 #endif
4116
4117 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4118 return -EIO;
4119
4120 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4121 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4122 }
4123
4124 static int wan_set_status(enum tpacpi_rfkill_state state)
4125 {
4126 int status;
4127
4128 vdbg_printk(TPACPI_DBG_RFKILL,
4129 "will attempt to %s wwan\n",
4130 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4131
4132 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4133 if (dbg_wwanemul) {
4134 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4135 return 0;
4136 }
4137 #endif
4138
4139 if (state == TPACPI_RFK_RADIO_ON)
4140 status = TP_ACPI_WANCARD_RADIOSSW
4141 | TP_ACPI_WANCARD_RESUMECTRL;
4142 else
4143 status = 0;
4144
4145 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4146 return -EIO;
4147
4148 return 0;
4149 }
4150
4151 /* sysfs wan enable ---------------------------------------------------- */
4152 static ssize_t wan_enable_show(struct device *dev,
4153 struct device_attribute *attr,
4154 char *buf)
4155 {
4156 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4157 attr, buf);
4158 }
4159
4160 static ssize_t wan_enable_store(struct device *dev,
4161 struct device_attribute *attr,
4162 const char *buf, size_t count)
4163 {
4164 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4165 attr, buf, count);
4166 }
4167
4168 static struct device_attribute dev_attr_wan_enable =
4169 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4170 wan_enable_show, wan_enable_store);
4171
4172 /* --------------------------------------------------------------------- */
4173
4174 static struct attribute *wan_attributes[] = {
4175 &dev_attr_wan_enable.attr,
4176 NULL
4177 };
4178
4179 static const struct attribute_group wan_attr_group = {
4180 .attrs = wan_attributes,
4181 };
4182
4183 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4184 .get_status = wan_get_status,
4185 .set_status = wan_set_status,
4186 };
4187
4188 static void wan_shutdown(void)
4189 {
4190 /* Order firmware to save current state to NVRAM */
4191 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4192 TP_ACPI_WGSV_SAVE_STATE))
4193 pr_notice("failed to save WWAN state to NVRAM\n");
4194 else
4195 vdbg_printk(TPACPI_DBG_RFKILL,
4196 "WWAN state saved to NVRAM\n");
4197 }
4198
4199 static void wan_exit(void)
4200 {
4201 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4202 &wan_attr_group);
4203
4204 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4205
4206 wan_shutdown();
4207 }
4208
4209 static int __init wan_init(struct ibm_init_struct *iibm)
4210 {
4211 int res;
4212 int status = 0;
4213
4214 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4215 "initializing wan subdriver\n");
4216
4217 TPACPI_ACPIHANDLE_INIT(hkey);
4218
4219 tp_features.wan = hkey_handle &&
4220 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4221
4222 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4223 "wan is %s, status 0x%02x\n",
4224 str_supported(tp_features.wan),
4225 status);
4226
4227 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4228 if (dbg_wwanemul) {
4229 tp_features.wan = 1;
4230 pr_info("wwan switch emulation enabled\n");
4231 } else
4232 #endif
4233 if (tp_features.wan &&
4234 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4235 /* no wan hardware present in system */
4236 tp_features.wan = 0;
4237 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4238 "wan hardware not installed\n");
4239 }
4240
4241 if (!tp_features.wan)
4242 return 1;
4243
4244 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4245 &wan_tprfk_ops,
4246 RFKILL_TYPE_WWAN,
4247 TPACPI_RFK_WWAN_SW_NAME,
4248 true);
4249 if (res)
4250 return res;
4251
4252 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4253 &wan_attr_group);
4254
4255 if (res) {
4256 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4257 return res;
4258 }
4259
4260 return 0;
4261 }
4262
4263 /* procfs -------------------------------------------------------------- */
4264 static int wan_read(struct seq_file *m)
4265 {
4266 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4267 }
4268
4269 static int wan_write(char *buf)
4270 {
4271 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4272 }
4273
4274 static struct ibm_struct wan_driver_data = {
4275 .name = "wan",
4276 .read = wan_read,
4277 .write = wan_write,
4278 .exit = wan_exit,
4279 .shutdown = wan_shutdown,
4280 };
4281
4282 /*************************************************************************
4283 * UWB subdriver
4284 */
4285
4286 enum {
4287 /* ACPI GUWB/SUWB bits */
4288 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4289 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4290 };
4291
4292 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4293
4294 static int uwb_get_status(void)
4295 {
4296 int status;
4297
4298 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4299 if (dbg_uwbemul)
4300 return (tpacpi_uwb_emulstate) ?
4301 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4302 #endif
4303
4304 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4305 return -EIO;
4306
4307 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4308 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4309 }
4310
4311 static int uwb_set_status(enum tpacpi_rfkill_state state)
4312 {
4313 int status;
4314
4315 vdbg_printk(TPACPI_DBG_RFKILL,
4316 "will attempt to %s UWB\n",
4317 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4318
4319 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4320 if (dbg_uwbemul) {
4321 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4322 return 0;
4323 }
4324 #endif
4325
4326 if (state == TPACPI_RFK_RADIO_ON)
4327 status = TP_ACPI_UWB_RADIOSSW;
4328 else
4329 status = 0;
4330
4331 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4332 return -EIO;
4333
4334 return 0;
4335 }
4336
4337 /* --------------------------------------------------------------------- */
4338
4339 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4340 .get_status = uwb_get_status,
4341 .set_status = uwb_set_status,
4342 };
4343
4344 static void uwb_exit(void)
4345 {
4346 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4347 }
4348
4349 static int __init uwb_init(struct ibm_init_struct *iibm)
4350 {
4351 int res;
4352 int status = 0;
4353
4354 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4355 "initializing uwb subdriver\n");
4356
4357 TPACPI_ACPIHANDLE_INIT(hkey);
4358
4359 tp_features.uwb = hkey_handle &&
4360 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4361
4362 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4363 "uwb is %s, status 0x%02x\n",
4364 str_supported(tp_features.uwb),
4365 status);
4366
4367 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4368 if (dbg_uwbemul) {
4369 tp_features.uwb = 1;
4370 pr_info("uwb switch emulation enabled\n");
4371 } else
4372 #endif
4373 if (tp_features.uwb &&
4374 !(status & TP_ACPI_UWB_HWPRESENT)) {
4375 /* no uwb hardware present in system */
4376 tp_features.uwb = 0;
4377 dbg_printk(TPACPI_DBG_INIT,
4378 "uwb hardware not installed\n");
4379 }
4380
4381 if (!tp_features.uwb)
4382 return 1;
4383
4384 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4385 &uwb_tprfk_ops,
4386 RFKILL_TYPE_UWB,
4387 TPACPI_RFK_UWB_SW_NAME,
4388 false);
4389 return res;
4390 }
4391
4392 static struct ibm_struct uwb_driver_data = {
4393 .name = "uwb",
4394 .exit = uwb_exit,
4395 .flags.experimental = 1,
4396 };
4397
4398 /*************************************************************************
4399 * Video subdriver
4400 */
4401
4402 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4403
4404 enum video_access_mode {
4405 TPACPI_VIDEO_NONE = 0,
4406 TPACPI_VIDEO_570, /* 570 */
4407 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4408 TPACPI_VIDEO_NEW, /* all others */
4409 };
4410
4411 enum { /* video status flags, based on VIDEO_570 */
4412 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4413 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4414 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4415 };
4416
4417 enum { /* TPACPI_VIDEO_570 constants */
4418 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4419 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4420 * video_status_flags */
4421 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4422 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4423 };
4424
4425 static enum video_access_mode video_supported;
4426 static int video_orig_autosw;
4427
4428 static int video_autosw_get(void);
4429 static int video_autosw_set(int enable);
4430
4431 TPACPI_HANDLE(vid, root,
4432 "\\_SB.PCI.AGP.VGA", /* 570 */
4433 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
4434 "\\_SB.PCI0.VID0", /* 770e */
4435 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
4436 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */
4437 "\\_SB.PCI0.AGP.VID", /* all others */
4438 ); /* R30, R31 */
4439
4440 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4441
4442 static int __init video_init(struct ibm_init_struct *iibm)
4443 {
4444 int ivga;
4445
4446 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4447
4448 TPACPI_ACPIHANDLE_INIT(vid);
4449 if (tpacpi_is_ibm())
4450 TPACPI_ACPIHANDLE_INIT(vid2);
4451
4452 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4453 /* G41, assume IVGA doesn't change */
4454 vid_handle = vid2_handle;
4455
4456 if (!vid_handle)
4457 /* video switching not supported on R30, R31 */
4458 video_supported = TPACPI_VIDEO_NONE;
4459 else if (tpacpi_is_ibm() &&
4460 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4461 /* 570 */
4462 video_supported = TPACPI_VIDEO_570;
4463 else if (tpacpi_is_ibm() &&
4464 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4465 /* 600e/x, 770e, 770x */
4466 video_supported = TPACPI_VIDEO_770;
4467 else
4468 /* all others */
4469 video_supported = TPACPI_VIDEO_NEW;
4470
4471 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4472 str_supported(video_supported != TPACPI_VIDEO_NONE),
4473 video_supported);
4474
4475 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4476 }
4477
4478 static void video_exit(void)
4479 {
4480 dbg_printk(TPACPI_DBG_EXIT,
4481 "restoring original video autoswitch mode\n");
4482 if (video_autosw_set(video_orig_autosw))
4483 pr_err("error while trying to restore original "
4484 "video autoswitch mode\n");
4485 }
4486
4487 static int video_outputsw_get(void)
4488 {
4489 int status = 0;
4490 int i;
4491
4492 switch (video_supported) {
4493 case TPACPI_VIDEO_570:
4494 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4495 TP_ACPI_VIDEO_570_PHSCMD))
4496 return -EIO;
4497 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4498 break;
4499 case TPACPI_VIDEO_770:
4500 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4501 return -EIO;
4502 if (i)
4503 status |= TP_ACPI_VIDEO_S_LCD;
4504 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4505 return -EIO;
4506 if (i)
4507 status |= TP_ACPI_VIDEO_S_CRT;
4508 break;
4509 case TPACPI_VIDEO_NEW:
4510 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4511 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4512 return -EIO;
4513 if (i)
4514 status |= TP_ACPI_VIDEO_S_CRT;
4515
4516 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4517 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4518 return -EIO;
4519 if (i)
4520 status |= TP_ACPI_VIDEO_S_LCD;
4521 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4522 return -EIO;
4523 if (i)
4524 status |= TP_ACPI_VIDEO_S_DVI;
4525 break;
4526 default:
4527 return -ENOSYS;
4528 }
4529
4530 return status;
4531 }
4532
4533 static int video_outputsw_set(int status)
4534 {
4535 int autosw;
4536 int res = 0;
4537
4538 switch (video_supported) {
4539 case TPACPI_VIDEO_570:
4540 res = acpi_evalf(NULL, NULL,
4541 "\\_SB.PHS2", "vdd",
4542 TP_ACPI_VIDEO_570_PHS2CMD,
4543 status | TP_ACPI_VIDEO_570_PHS2SET);
4544 break;
4545 case TPACPI_VIDEO_770:
4546 autosw = video_autosw_get();
4547 if (autosw < 0)
4548 return autosw;
4549
4550 res = video_autosw_set(1);
4551 if (res)
4552 return res;
4553 res = acpi_evalf(vid_handle, NULL,
4554 "ASWT", "vdd", status * 0x100, 0);
4555 if (!autosw && video_autosw_set(autosw)) {
4556 pr_err("video auto-switch left enabled due to error\n");
4557 return -EIO;
4558 }
4559 break;
4560 case TPACPI_VIDEO_NEW:
4561 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4562 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4563 break;
4564 default:
4565 return -ENOSYS;
4566 }
4567
4568 return (res)? 0 : -EIO;
4569 }
4570
4571 static int video_autosw_get(void)
4572 {
4573 int autosw = 0;
4574
4575 switch (video_supported) {
4576 case TPACPI_VIDEO_570:
4577 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4578 return -EIO;
4579 break;
4580 case TPACPI_VIDEO_770:
4581 case TPACPI_VIDEO_NEW:
4582 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4583 return -EIO;
4584 break;
4585 default:
4586 return -ENOSYS;
4587 }
4588
4589 return autosw & 1;
4590 }
4591
4592 static int video_autosw_set(int enable)
4593 {
4594 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4595 return -EIO;
4596 return 0;
4597 }
4598
4599 static int video_outputsw_cycle(void)
4600 {
4601 int autosw = video_autosw_get();
4602 int res;
4603
4604 if (autosw < 0)
4605 return autosw;
4606
4607 switch (video_supported) {
4608 case TPACPI_VIDEO_570:
4609 res = video_autosw_set(1);
4610 if (res)
4611 return res;
4612 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4613 break;
4614 case TPACPI_VIDEO_770:
4615 case TPACPI_VIDEO_NEW:
4616 res = video_autosw_set(1);
4617 if (res)
4618 return res;
4619 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4620 break;
4621 default:
4622 return -ENOSYS;
4623 }
4624 if (!autosw && video_autosw_set(autosw)) {
4625 pr_err("video auto-switch left enabled due to error\n");
4626 return -EIO;
4627 }
4628
4629 return (res)? 0 : -EIO;
4630 }
4631
4632 static int video_expand_toggle(void)
4633 {
4634 switch (video_supported) {
4635 case TPACPI_VIDEO_570:
4636 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4637 0 : -EIO;
4638 case TPACPI_VIDEO_770:
4639 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4640 0 : -EIO;
4641 case TPACPI_VIDEO_NEW:
4642 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4643 0 : -EIO;
4644 default:
4645 return -ENOSYS;
4646 }
4647 /* not reached */
4648 }
4649
4650 static int video_read(struct seq_file *m)
4651 {
4652 int status, autosw;
4653
4654 if (video_supported == TPACPI_VIDEO_NONE) {
4655 seq_printf(m, "status:\t\tnot supported\n");
4656 return 0;
4657 }
4658
4659 /* Even reads can crash X.org, so... */
4660 if (!capable(CAP_SYS_ADMIN))
4661 return -EPERM;
4662
4663 status = video_outputsw_get();
4664 if (status < 0)
4665 return status;
4666
4667 autosw = video_autosw_get();
4668 if (autosw < 0)
4669 return autosw;
4670
4671 seq_printf(m, "status:\t\tsupported\n");
4672 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4673 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4674 if (video_supported == TPACPI_VIDEO_NEW)
4675 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4676 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4677 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4678 seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4679 if (video_supported == TPACPI_VIDEO_NEW)
4680 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4681 seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4682 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4683
4684 return 0;
4685 }
4686
4687 static int video_write(char *buf)
4688 {
4689 char *cmd;
4690 int enable, disable, status;
4691 int res;
4692
4693 if (video_supported == TPACPI_VIDEO_NONE)
4694 return -ENODEV;
4695
4696 /* Even reads can crash X.org, let alone writes... */
4697 if (!capable(CAP_SYS_ADMIN))
4698 return -EPERM;
4699
4700 enable = 0;
4701 disable = 0;
4702
4703 while ((cmd = next_cmd(&buf))) {
4704 if (strlencmp(cmd, "lcd_enable") == 0) {
4705 enable |= TP_ACPI_VIDEO_S_LCD;
4706 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4707 disable |= TP_ACPI_VIDEO_S_LCD;
4708 } else if (strlencmp(cmd, "crt_enable") == 0) {
4709 enable |= TP_ACPI_VIDEO_S_CRT;
4710 } else if (strlencmp(cmd, "crt_disable") == 0) {
4711 disable |= TP_ACPI_VIDEO_S_CRT;
4712 } else if (video_supported == TPACPI_VIDEO_NEW &&
4713 strlencmp(cmd, "dvi_enable") == 0) {
4714 enable |= TP_ACPI_VIDEO_S_DVI;
4715 } else if (video_supported == TPACPI_VIDEO_NEW &&
4716 strlencmp(cmd, "dvi_disable") == 0) {
4717 disable |= TP_ACPI_VIDEO_S_DVI;
4718 } else if (strlencmp(cmd, "auto_enable") == 0) {
4719 res = video_autosw_set(1);
4720 if (res)
4721 return res;
4722 } else if (strlencmp(cmd, "auto_disable") == 0) {
4723 res = video_autosw_set(0);
4724 if (res)
4725 return res;
4726 } else if (strlencmp(cmd, "video_switch") == 0) {
4727 res = video_outputsw_cycle();
4728 if (res)
4729 return res;
4730 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4731 res = video_expand_toggle();
4732 if (res)
4733 return res;
4734 } else
4735 return -EINVAL;
4736 }
4737
4738 if (enable || disable) {
4739 status = video_outputsw_get();
4740 if (status < 0)
4741 return status;
4742 res = video_outputsw_set((status & ~disable) | enable);
4743 if (res)
4744 return res;
4745 }
4746
4747 return 0;
4748 }
4749
4750 static struct ibm_struct video_driver_data = {
4751 .name = "video",
4752 .read = video_read,
4753 .write = video_write,
4754 .exit = video_exit,
4755 };
4756
4757 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4758
4759 /*************************************************************************
4760 * Light (thinklight) subdriver
4761 */
4762
4763 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4764 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4765
4766 static int light_get_status(void)
4767 {
4768 int status = 0;
4769
4770 if (tp_features.light_status) {
4771 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4772 return -EIO;
4773 return (!!status);
4774 }
4775
4776 return -ENXIO;
4777 }
4778
4779 static int light_set_status(int status)
4780 {
4781 int rc;
4782
4783 if (tp_features.light) {
4784 if (cmos_handle) {
4785 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4786 (status)?
4787 TP_CMOS_THINKLIGHT_ON :
4788 TP_CMOS_THINKLIGHT_OFF);
4789 } else {
4790 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4791 (status)? 1 : 0);
4792 }
4793 return (rc)? 0 : -EIO;
4794 }
4795
4796 return -ENXIO;
4797 }
4798
4799 static void light_set_status_worker(struct work_struct *work)
4800 {
4801 struct tpacpi_led_classdev *data =
4802 container_of(work, struct tpacpi_led_classdev, work);
4803
4804 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4805 light_set_status((data->new_state != TPACPI_LED_OFF));
4806 }
4807
4808 static void light_sysfs_set(struct led_classdev *led_cdev,
4809 enum led_brightness brightness)
4810 {
4811 struct tpacpi_led_classdev *data =
4812 container_of(led_cdev,
4813 struct tpacpi_led_classdev,
4814 led_classdev);
4815 data->new_state = (brightness != LED_OFF) ?
4816 TPACPI_LED_ON : TPACPI_LED_OFF;
4817 queue_work(tpacpi_wq, &data->work);
4818 }
4819
4820 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4821 {
4822 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4823 }
4824
4825 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4826 .led_classdev = {
4827 .name = "tpacpi::thinklight",
4828 .brightness_set = &light_sysfs_set,
4829 .brightness_get = &light_sysfs_get,
4830 }
4831 };
4832
4833 static int __init light_init(struct ibm_init_struct *iibm)
4834 {
4835 int rc;
4836
4837 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4838
4839 if (tpacpi_is_ibm()) {
4840 TPACPI_ACPIHANDLE_INIT(ledb);
4841 TPACPI_ACPIHANDLE_INIT(lght);
4842 }
4843 TPACPI_ACPIHANDLE_INIT(cmos);
4844 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4845
4846 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4847 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4848
4849 if (tp_features.light)
4850 /* light status not supported on
4851 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4852 tp_features.light_status =
4853 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4854
4855 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4856 str_supported(tp_features.light),
4857 str_supported(tp_features.light_status));
4858
4859 if (!tp_features.light)
4860 return 1;
4861
4862 rc = led_classdev_register(&tpacpi_pdev->dev,
4863 &tpacpi_led_thinklight.led_classdev);
4864
4865 if (rc < 0) {
4866 tp_features.light = 0;
4867 tp_features.light_status = 0;
4868 } else {
4869 rc = 0;
4870 }
4871
4872 return rc;
4873 }
4874
4875 static void light_exit(void)
4876 {
4877 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4878 if (work_pending(&tpacpi_led_thinklight.work))
4879 flush_workqueue(tpacpi_wq);
4880 }
4881
4882 static int light_read(struct seq_file *m)
4883 {
4884 int status;
4885
4886 if (!tp_features.light) {
4887 seq_printf(m, "status:\t\tnot supported\n");
4888 } else if (!tp_features.light_status) {
4889 seq_printf(m, "status:\t\tunknown\n");
4890 seq_printf(m, "commands:\ton, off\n");
4891 } else {
4892 status = light_get_status();
4893 if (status < 0)
4894 return status;
4895 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4896 seq_printf(m, "commands:\ton, off\n");
4897 }
4898
4899 return 0;
4900 }
4901
4902 static int light_write(char *buf)
4903 {
4904 char *cmd;
4905 int newstatus = 0;
4906
4907 if (!tp_features.light)
4908 return -ENODEV;
4909
4910 while ((cmd = next_cmd(&buf))) {
4911 if (strlencmp(cmd, "on") == 0) {
4912 newstatus = 1;
4913 } else if (strlencmp(cmd, "off") == 0) {
4914 newstatus = 0;
4915 } else
4916 return -EINVAL;
4917 }
4918
4919 return light_set_status(newstatus);
4920 }
4921
4922 static struct ibm_struct light_driver_data = {
4923 .name = "light",
4924 .read = light_read,
4925 .write = light_write,
4926 .exit = light_exit,
4927 };
4928
4929 /*************************************************************************
4930 * CMOS subdriver
4931 */
4932
4933 /* sysfs cmos_command -------------------------------------------------- */
4934 static ssize_t cmos_command_store(struct device *dev,
4935 struct device_attribute *attr,
4936 const char *buf, size_t count)
4937 {
4938 unsigned long cmos_cmd;
4939 int res;
4940
4941 if (parse_strtoul(buf, 21, &cmos_cmd))
4942 return -EINVAL;
4943
4944 res = issue_thinkpad_cmos_command(cmos_cmd);
4945 return (res)? res : count;
4946 }
4947
4948 static struct device_attribute dev_attr_cmos_command =
4949 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4950
4951 /* --------------------------------------------------------------------- */
4952
4953 static int __init cmos_init(struct ibm_init_struct *iibm)
4954 {
4955 int res;
4956
4957 vdbg_printk(TPACPI_DBG_INIT,
4958 "initializing cmos commands subdriver\n");
4959
4960 TPACPI_ACPIHANDLE_INIT(cmos);
4961
4962 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4963 str_supported(cmos_handle != NULL));
4964
4965 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4966 if (res)
4967 return res;
4968
4969 return (cmos_handle)? 0 : 1;
4970 }
4971
4972 static void cmos_exit(void)
4973 {
4974 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4975 }
4976
4977 static int cmos_read(struct seq_file *m)
4978 {
4979 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4980 R30, R31, T20-22, X20-21 */
4981 if (!cmos_handle)
4982 seq_printf(m, "status:\t\tnot supported\n");
4983 else {
4984 seq_printf(m, "status:\t\tsupported\n");
4985 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4986 }
4987
4988 return 0;
4989 }
4990
4991 static int cmos_write(char *buf)
4992 {
4993 char *cmd;
4994 int cmos_cmd, res;
4995
4996 while ((cmd = next_cmd(&buf))) {
4997 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4998 cmos_cmd >= 0 && cmos_cmd <= 21) {
4999 /* cmos_cmd set */
5000 } else
5001 return -EINVAL;
5002
5003 res = issue_thinkpad_cmos_command(cmos_cmd);
5004 if (res)
5005 return res;
5006 }
5007
5008 return 0;
5009 }
5010
5011 static struct ibm_struct cmos_driver_data = {
5012 .name = "cmos",
5013 .read = cmos_read,
5014 .write = cmos_write,
5015 .exit = cmos_exit,
5016 };
5017
5018 /*************************************************************************
5019 * LED subdriver
5020 */
5021
5022 enum led_access_mode {
5023 TPACPI_LED_NONE = 0,
5024 TPACPI_LED_570, /* 570 */
5025 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5026 TPACPI_LED_NEW, /* all others */
5027 };
5028
5029 enum { /* For TPACPI_LED_OLD */
5030 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
5031 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
5032 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
5033 };
5034
5035 static enum led_access_mode led_supported;
5036
5037 static acpi_handle led_handle;
5038
5039 #define TPACPI_LED_NUMLEDS 16
5040 static struct tpacpi_led_classdev *tpacpi_leds;
5041 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5042 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5043 /* there's a limit of 19 chars + NULL before 2.6.26 */
5044 "tpacpi::power",
5045 "tpacpi:orange:batt",
5046 "tpacpi:green:batt",
5047 "tpacpi::dock_active",
5048 "tpacpi::bay_active",
5049 "tpacpi::dock_batt",
5050 "tpacpi::unknown_led",
5051 "tpacpi::standby",
5052 "tpacpi::dock_status1",
5053 "tpacpi::dock_status2",
5054 "tpacpi::unknown_led2",
5055 "tpacpi::unknown_led3",
5056 "tpacpi::thinkvantage",
5057 };
5058 #define TPACPI_SAFE_LEDS 0x1081U
5059
5060 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5061 {
5062 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5063 return false;
5064 #else
5065 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5066 #endif
5067 }
5068
5069 static int led_get_status(const unsigned int led)
5070 {
5071 int status;
5072 enum led_status_t led_s;
5073
5074 switch (led_supported) {
5075 case TPACPI_LED_570:
5076 if (!acpi_evalf(ec_handle,
5077 &status, "GLED", "dd", 1 << led))
5078 return -EIO;
5079 led_s = (status == 0)?
5080 TPACPI_LED_OFF :
5081 ((status == 1)?
5082 TPACPI_LED_ON :
5083 TPACPI_LED_BLINK);
5084 tpacpi_led_state_cache[led] = led_s;
5085 return led_s;
5086 default:
5087 return -ENXIO;
5088 }
5089
5090 /* not reached */
5091 }
5092
5093 static int led_set_status(const unsigned int led,
5094 const enum led_status_t ledstatus)
5095 {
5096 /* off, on, blink. Index is led_status_t */
5097 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5098 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5099
5100 int rc = 0;
5101
5102 switch (led_supported) {
5103 case TPACPI_LED_570:
5104 /* 570 */
5105 if (unlikely(led > 7))
5106 return -EINVAL;
5107 if (unlikely(tpacpi_is_led_restricted(led)))
5108 return -EPERM;
5109 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5110 (1 << led), led_sled_arg1[ledstatus]))
5111 rc = -EIO;
5112 break;
5113 case TPACPI_LED_OLD:
5114 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5115 if (unlikely(led > 7))
5116 return -EINVAL;
5117 if (unlikely(tpacpi_is_led_restricted(led)))
5118 return -EPERM;
5119 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5120 if (rc >= 0)
5121 rc = ec_write(TPACPI_LED_EC_HLBL,
5122 (ledstatus == TPACPI_LED_BLINK) << led);
5123 if (rc >= 0)
5124 rc = ec_write(TPACPI_LED_EC_HLCL,
5125 (ledstatus != TPACPI_LED_OFF) << led);
5126 break;
5127 case TPACPI_LED_NEW:
5128 /* all others */
5129 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5130 return -EINVAL;
5131 if (unlikely(tpacpi_is_led_restricted(led)))
5132 return -EPERM;
5133 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5134 led, led_led_arg1[ledstatus]))
5135 rc = -EIO;
5136 break;
5137 default:
5138 rc = -ENXIO;
5139 }
5140
5141 if (!rc)
5142 tpacpi_led_state_cache[led] = ledstatus;
5143
5144 return rc;
5145 }
5146
5147 static void led_set_status_worker(struct work_struct *work)
5148 {
5149 struct tpacpi_led_classdev *data =
5150 container_of(work, struct tpacpi_led_classdev, work);
5151
5152 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5153 led_set_status(data->led, data->new_state);
5154 }
5155
5156 static void led_sysfs_set(struct led_classdev *led_cdev,
5157 enum led_brightness brightness)
5158 {
5159 struct tpacpi_led_classdev *data = container_of(led_cdev,
5160 struct tpacpi_led_classdev, led_classdev);
5161
5162 if (brightness == LED_OFF)
5163 data->new_state = TPACPI_LED_OFF;
5164 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5165 data->new_state = TPACPI_LED_ON;
5166 else
5167 data->new_state = TPACPI_LED_BLINK;
5168
5169 queue_work(tpacpi_wq, &data->work);
5170 }
5171
5172 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5173 unsigned long *delay_on, unsigned long *delay_off)
5174 {
5175 struct tpacpi_led_classdev *data = container_of(led_cdev,
5176 struct tpacpi_led_classdev, led_classdev);
5177
5178 /* Can we choose the flash rate? */
5179 if (*delay_on == 0 && *delay_off == 0) {
5180 /* yes. set them to the hardware blink rate (1 Hz) */
5181 *delay_on = 500; /* ms */
5182 *delay_off = 500; /* ms */
5183 } else if ((*delay_on != 500) || (*delay_off != 500))
5184 return -EINVAL;
5185
5186 data->new_state = TPACPI_LED_BLINK;
5187 queue_work(tpacpi_wq, &data->work);
5188
5189 return 0;
5190 }
5191
5192 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5193 {
5194 int rc;
5195
5196 struct tpacpi_led_classdev *data = container_of(led_cdev,
5197 struct tpacpi_led_classdev, led_classdev);
5198
5199 rc = led_get_status(data->led);
5200
5201 if (rc == TPACPI_LED_OFF || rc < 0)
5202 rc = LED_OFF; /* no error handling in led class :( */
5203 else
5204 rc = LED_FULL;
5205
5206 return rc;
5207 }
5208
5209 static void led_exit(void)
5210 {
5211 unsigned int i;
5212
5213 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5214 if (tpacpi_leds[i].led_classdev.name)
5215 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5216 }
5217
5218 flush_workqueue(tpacpi_wq);
5219 kfree(tpacpi_leds);
5220 }
5221
5222 static int __init tpacpi_init_led(unsigned int led)
5223 {
5224 int rc;
5225
5226 tpacpi_leds[led].led = led;
5227
5228 /* LEDs with no name don't get registered */
5229 if (!tpacpi_led_names[led])
5230 return 0;
5231
5232 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5233 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5234 if (led_supported == TPACPI_LED_570)
5235 tpacpi_leds[led].led_classdev.brightness_get =
5236 &led_sysfs_get;
5237
5238 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5239
5240 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5241
5242 rc = led_classdev_register(&tpacpi_pdev->dev,
5243 &tpacpi_leds[led].led_classdev);
5244 if (rc < 0)
5245 tpacpi_leds[led].led_classdev.name = NULL;
5246
5247 return rc;
5248 }
5249
5250 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5251 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5252 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5253 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5254
5255 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5256 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5257 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5258 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5259 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5260 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5261 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5262 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5263
5264 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5265 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5266 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5267 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5268 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5269
5270 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5271 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5272 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5273 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5274
5275 /* (1) - may have excess leds enabled on MSB */
5276
5277 /* Defaults (order matters, keep last, don't reorder!) */
5278 { /* Lenovo */
5279 .vendor = PCI_VENDOR_ID_LENOVO,
5280 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5281 .quirks = 0x1fffU,
5282 },
5283 { /* IBM ThinkPads with no EC version string */
5284 .vendor = PCI_VENDOR_ID_IBM,
5285 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5286 .quirks = 0x00ffU,
5287 },
5288 { /* IBM ThinkPads with EC version string */
5289 .vendor = PCI_VENDOR_ID_IBM,
5290 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5291 .quirks = 0x00bfU,
5292 },
5293 };
5294
5295 #undef TPACPI_LEDQ_IBM
5296 #undef TPACPI_LEDQ_LNV
5297
5298 static enum led_access_mode __init led_init_detect_mode(void)
5299 {
5300 acpi_status status;
5301
5302 if (tpacpi_is_ibm()) {
5303 /* 570 */
5304 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5305 if (ACPI_SUCCESS(status))
5306 return TPACPI_LED_570;
5307
5308 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5309 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5310 if (ACPI_SUCCESS(status))
5311 return TPACPI_LED_OLD;
5312 }
5313
5314 /* most others */
5315 status = acpi_get_handle(ec_handle, "LED", &led_handle);
5316 if (ACPI_SUCCESS(status))
5317 return TPACPI_LED_NEW;
5318
5319 /* R30, R31, and unknown firmwares */
5320 led_handle = NULL;
5321 return TPACPI_LED_NONE;
5322 }
5323
5324 static int __init led_init(struct ibm_init_struct *iibm)
5325 {
5326 unsigned int i;
5327 int rc;
5328 unsigned long useful_leds;
5329
5330 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5331
5332 led_supported = led_init_detect_mode();
5333
5334 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5335 str_supported(led_supported), led_supported);
5336
5337 if (led_supported == TPACPI_LED_NONE)
5338 return 1;
5339
5340 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5341 GFP_KERNEL);
5342 if (!tpacpi_leds) {
5343 pr_err("Out of memory for LED data\n");
5344 return -ENOMEM;
5345 }
5346
5347 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5348 ARRAY_SIZE(led_useful_qtable));
5349
5350 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5351 if (!tpacpi_is_led_restricted(i) &&
5352 test_bit(i, &useful_leds)) {
5353 rc = tpacpi_init_led(i);
5354 if (rc < 0) {
5355 led_exit();
5356 return rc;
5357 }
5358 }
5359 }
5360
5361 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5362 pr_notice("warning: userspace override of important "
5363 "firmware LEDs is enabled\n");
5364 #endif
5365 return 0;
5366 }
5367
5368 #define str_led_status(s) \
5369 ((s) == TPACPI_LED_OFF ? "off" : \
5370 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5371
5372 static int led_read(struct seq_file *m)
5373 {
5374 if (!led_supported) {
5375 seq_printf(m, "status:\t\tnot supported\n");
5376 return 0;
5377 }
5378 seq_printf(m, "status:\t\tsupported\n");
5379
5380 if (led_supported == TPACPI_LED_570) {
5381 /* 570 */
5382 int i, status;
5383 for (i = 0; i < 8; i++) {
5384 status = led_get_status(i);
5385 if (status < 0)
5386 return -EIO;
5387 seq_printf(m, "%d:\t\t%s\n",
5388 i, str_led_status(status));
5389 }
5390 }
5391
5392 seq_printf(m, "commands:\t"
5393 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5394
5395 return 0;
5396 }
5397
5398 static int led_write(char *buf)
5399 {
5400 char *cmd;
5401 int led, rc;
5402 enum led_status_t s;
5403
5404 if (!led_supported)
5405 return -ENODEV;
5406
5407 while ((cmd = next_cmd(&buf))) {
5408 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5409 return -EINVAL;
5410
5411 if (strstr(cmd, "off")) {
5412 s = TPACPI_LED_OFF;
5413 } else if (strstr(cmd, "on")) {
5414 s = TPACPI_LED_ON;
5415 } else if (strstr(cmd, "blink")) {
5416 s = TPACPI_LED_BLINK;
5417 } else {
5418 return -EINVAL;
5419 }
5420
5421 rc = led_set_status(led, s);
5422 if (rc < 0)
5423 return rc;
5424 }
5425
5426 return 0;
5427 }
5428
5429 static struct ibm_struct led_driver_data = {
5430 .name = "led",
5431 .read = led_read,
5432 .write = led_write,
5433 .exit = led_exit,
5434 };
5435
5436 /*************************************************************************
5437 * Beep subdriver
5438 */
5439
5440 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5441
5442 #define TPACPI_BEEP_Q1 0x0001
5443
5444 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5445 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5446 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5447 };
5448
5449 static int __init beep_init(struct ibm_init_struct *iibm)
5450 {
5451 unsigned long quirks;
5452
5453 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5454
5455 TPACPI_ACPIHANDLE_INIT(beep);
5456
5457 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5458 str_supported(beep_handle != NULL));
5459
5460 quirks = tpacpi_check_quirks(beep_quirk_table,
5461 ARRAY_SIZE(beep_quirk_table));
5462
5463 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5464
5465 return (beep_handle)? 0 : 1;
5466 }
5467
5468 static int beep_read(struct seq_file *m)
5469 {
5470 if (!beep_handle)
5471 seq_printf(m, "status:\t\tnot supported\n");
5472 else {
5473 seq_printf(m, "status:\t\tsupported\n");
5474 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5475 }
5476
5477 return 0;
5478 }
5479
5480 static int beep_write(char *buf)
5481 {
5482 char *cmd;
5483 int beep_cmd;
5484
5485 if (!beep_handle)
5486 return -ENODEV;
5487
5488 while ((cmd = next_cmd(&buf))) {
5489 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5490 beep_cmd >= 0 && beep_cmd <= 17) {
5491 /* beep_cmd set */
5492 } else
5493 return -EINVAL;
5494 if (tp_features.beep_needs_two_args) {
5495 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5496 beep_cmd, 0))
5497 return -EIO;
5498 } else {
5499 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5500 beep_cmd))
5501 return -EIO;
5502 }
5503 }
5504
5505 return 0;
5506 }
5507
5508 static struct ibm_struct beep_driver_data = {
5509 .name = "beep",
5510 .read = beep_read,
5511 .write = beep_write,
5512 };
5513
5514 /*************************************************************************
5515 * Thermal subdriver
5516 */
5517
5518 enum thermal_access_mode {
5519 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5520 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5521 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5522 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5523 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5524 };
5525
5526 enum { /* TPACPI_THERMAL_TPEC_* */
5527 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5528 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5529 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5530
5531 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5532 };
5533
5534
5535 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5536 struct ibm_thermal_sensors_struct {
5537 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5538 };
5539
5540 static enum thermal_access_mode thermal_read_mode;
5541
5542 /* idx is zero-based */
5543 static int thermal_get_sensor(int idx, s32 *value)
5544 {
5545 int t;
5546 s8 tmp;
5547 char tmpi[5];
5548
5549 t = TP_EC_THERMAL_TMP0;
5550
5551 switch (thermal_read_mode) {
5552 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5553 case TPACPI_THERMAL_TPEC_16:
5554 if (idx >= 8 && idx <= 15) {
5555 t = TP_EC_THERMAL_TMP8;
5556 idx -= 8;
5557 }
5558 /* fallthrough */
5559 #endif
5560 case TPACPI_THERMAL_TPEC_8:
5561 if (idx <= 7) {
5562 if (!acpi_ec_read(t + idx, &tmp))
5563 return -EIO;
5564 *value = tmp * 1000;
5565 return 0;
5566 }
5567 break;
5568
5569 case TPACPI_THERMAL_ACPI_UPDT:
5570 if (idx <= 7) {
5571 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5572 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5573 return -EIO;
5574 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5575 return -EIO;
5576 *value = (t - 2732) * 100;
5577 return 0;
5578 }
5579 break;
5580
5581 case TPACPI_THERMAL_ACPI_TMP07:
5582 if (idx <= 7) {
5583 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5584 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5585 return -EIO;
5586 if (t > 127 || t < -127)
5587 t = TP_EC_THERMAL_TMP_NA;
5588 *value = t * 1000;
5589 return 0;
5590 }
5591 break;
5592
5593 case TPACPI_THERMAL_NONE:
5594 default:
5595 return -ENOSYS;
5596 }
5597
5598 return -EINVAL;
5599 }
5600
5601 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5602 {
5603 int res, i;
5604 int n;
5605
5606 n = 8;
5607 i = 0;
5608
5609 if (!s)
5610 return -EINVAL;
5611
5612 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5613 n = 16;
5614
5615 for (i = 0 ; i < n; i++) {
5616 res = thermal_get_sensor(i, &s->temp[i]);
5617 if (res)
5618 return res;
5619 }
5620
5621 return n;
5622 }
5623
5624 static void thermal_dump_all_sensors(void)
5625 {
5626 int n, i;
5627 struct ibm_thermal_sensors_struct t;
5628
5629 n = thermal_get_sensors(&t);
5630 if (n <= 0)
5631 return;
5632
5633 pr_notice("temperatures (Celsius):");
5634
5635 for (i = 0; i < n; i++) {
5636 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5637 pr_cont(" %d", (int)(t.temp[i] / 1000));
5638 else
5639 pr_cont(" N/A");
5640 }
5641
5642 pr_cont("\n");
5643 }
5644
5645 /* sysfs temp##_input -------------------------------------------------- */
5646
5647 static ssize_t thermal_temp_input_show(struct device *dev,
5648 struct device_attribute *attr,
5649 char *buf)
5650 {
5651 struct sensor_device_attribute *sensor_attr =
5652 to_sensor_dev_attr(attr);
5653 int idx = sensor_attr->index;
5654 s32 value;
5655 int res;
5656
5657 res = thermal_get_sensor(idx, &value);
5658 if (res)
5659 return res;
5660 if (value == TPACPI_THERMAL_SENSOR_NA)
5661 return -ENXIO;
5662
5663 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5664 }
5665
5666 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5667 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5668 thermal_temp_input_show, NULL, _idxB)
5669
5670 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5671 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5672 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5673 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5674 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5675 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5676 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5677 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5678 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5679 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5680 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5681 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5682 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5683 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5684 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5685 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5686 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5687 };
5688
5689 #define THERMAL_ATTRS(X) \
5690 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5691
5692 static struct attribute *thermal_temp_input_attr[] = {
5693 THERMAL_ATTRS(8),
5694 THERMAL_ATTRS(9),
5695 THERMAL_ATTRS(10),
5696 THERMAL_ATTRS(11),
5697 THERMAL_ATTRS(12),
5698 THERMAL_ATTRS(13),
5699 THERMAL_ATTRS(14),
5700 THERMAL_ATTRS(15),
5701 THERMAL_ATTRS(0),
5702 THERMAL_ATTRS(1),
5703 THERMAL_ATTRS(2),
5704 THERMAL_ATTRS(3),
5705 THERMAL_ATTRS(4),
5706 THERMAL_ATTRS(5),
5707 THERMAL_ATTRS(6),
5708 THERMAL_ATTRS(7),
5709 NULL
5710 };
5711
5712 static const struct attribute_group thermal_temp_input16_group = {
5713 .attrs = thermal_temp_input_attr
5714 };
5715
5716 static const struct attribute_group thermal_temp_input8_group = {
5717 .attrs = &thermal_temp_input_attr[8]
5718 };
5719
5720 #undef THERMAL_SENSOR_ATTR_TEMP
5721 #undef THERMAL_ATTRS
5722
5723 /* --------------------------------------------------------------------- */
5724
5725 static int __init thermal_init(struct ibm_init_struct *iibm)
5726 {
5727 u8 t, ta1, ta2;
5728 int i;
5729 int acpi_tmp7;
5730 int res;
5731
5732 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5733
5734 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5735
5736 if (thinkpad_id.ec_model) {
5737 /*
5738 * Direct EC access mode: sensors at registers
5739 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5740 * non-implemented, thermal sensors return 0x80 when
5741 * not available
5742 */
5743
5744 ta1 = ta2 = 0;
5745 for (i = 0; i < 8; i++) {
5746 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5747 ta1 |= t;
5748 } else {
5749 ta1 = 0;
5750 break;
5751 }
5752 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5753 ta2 |= t;
5754 } else {
5755 ta1 = 0;
5756 break;
5757 }
5758 }
5759 if (ta1 == 0) {
5760 /* This is sheer paranoia, but we handle it anyway */
5761 if (acpi_tmp7) {
5762 pr_err("ThinkPad ACPI EC access misbehaving, "
5763 "falling back to ACPI TMPx access "
5764 "mode\n");
5765 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5766 } else {
5767 pr_err("ThinkPad ACPI EC access misbehaving, "
5768 "disabling thermal sensors access\n");
5769 thermal_read_mode = TPACPI_THERMAL_NONE;
5770 }
5771 } else {
5772 thermal_read_mode =
5773 (ta2 != 0) ?
5774 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5775 }
5776 } else if (acpi_tmp7) {
5777 if (tpacpi_is_ibm() &&
5778 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5779 /* 600e/x, 770e, 770x */
5780 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5781 } else {
5782 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5783 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5784 }
5785 } else {
5786 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5787 thermal_read_mode = TPACPI_THERMAL_NONE;
5788 }
5789
5790 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5791 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5792 thermal_read_mode);
5793
5794 switch (thermal_read_mode) {
5795 case TPACPI_THERMAL_TPEC_16:
5796 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5797 &thermal_temp_input16_group);
5798 if (res)
5799 return res;
5800 break;
5801 case TPACPI_THERMAL_TPEC_8:
5802 case TPACPI_THERMAL_ACPI_TMP07:
5803 case TPACPI_THERMAL_ACPI_UPDT:
5804 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5805 &thermal_temp_input8_group);
5806 if (res)
5807 return res;
5808 break;
5809 case TPACPI_THERMAL_NONE:
5810 default:
5811 return 1;
5812 }
5813
5814 return 0;
5815 }
5816
5817 static void thermal_exit(void)
5818 {
5819 switch (thermal_read_mode) {
5820 case TPACPI_THERMAL_TPEC_16:
5821 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5822 &thermal_temp_input16_group);
5823 break;
5824 case TPACPI_THERMAL_TPEC_8:
5825 case TPACPI_THERMAL_ACPI_TMP07:
5826 case TPACPI_THERMAL_ACPI_UPDT:
5827 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5828 &thermal_temp_input8_group);
5829 break;
5830 case TPACPI_THERMAL_NONE:
5831 default:
5832 break;
5833 }
5834 }
5835
5836 static int thermal_read(struct seq_file *m)
5837 {
5838 int n, i;
5839 struct ibm_thermal_sensors_struct t;
5840
5841 n = thermal_get_sensors(&t);
5842 if (unlikely(n < 0))
5843 return n;
5844
5845 seq_printf(m, "temperatures:\t");
5846
5847 if (n > 0) {
5848 for (i = 0; i < (n - 1); i++)
5849 seq_printf(m, "%d ", t.temp[i] / 1000);
5850 seq_printf(m, "%d\n", t.temp[i] / 1000);
5851 } else
5852 seq_printf(m, "not supported\n");
5853
5854 return 0;
5855 }
5856
5857 static struct ibm_struct thermal_driver_data = {
5858 .name = "thermal",
5859 .read = thermal_read,
5860 .exit = thermal_exit,
5861 };
5862
5863 /*************************************************************************
5864 * Backlight/brightness subdriver
5865 */
5866
5867 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5868
5869 /*
5870 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5871 * CMOS NVRAM byte 0x5E, bits 0-3.
5872 *
5873 * EC HBRV (0x31) has the following layout
5874 * Bit 7: unknown function
5875 * Bit 6: unknown function
5876 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5877 * Bit 4: must be set to zero to avoid problems
5878 * Bit 3-0: backlight brightness level
5879 *
5880 * brightness_get_raw returns status data in the HBRV layout
5881 *
5882 * WARNING: The X61 has been verified to use HBRV for something else, so
5883 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5884 * testing on the very early *60 Lenovo models...
5885 */
5886
5887 enum {
5888 TP_EC_BACKLIGHT = 0x31,
5889
5890 /* TP_EC_BACKLIGHT bitmasks */
5891 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5892 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5893 TP_EC_BACKLIGHT_MAPSW = 0x20,
5894 };
5895
5896 enum tpacpi_brightness_access_mode {
5897 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5898 TPACPI_BRGHT_MODE_EC, /* EC control */
5899 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5900 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5901 TPACPI_BRGHT_MODE_MAX
5902 };
5903
5904 static struct backlight_device *ibm_backlight_device;
5905
5906 static enum tpacpi_brightness_access_mode brightness_mode =
5907 TPACPI_BRGHT_MODE_MAX;
5908
5909 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5910
5911 static struct mutex brightness_mutex;
5912
5913 /* NVRAM brightness access,
5914 * call with brightness_mutex held! */
5915 static unsigned int tpacpi_brightness_nvram_get(void)
5916 {
5917 u8 lnvram;
5918
5919 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5920 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5921 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5922 lnvram &= bright_maxlvl;
5923
5924 return lnvram;
5925 }
5926
5927 static void tpacpi_brightness_checkpoint_nvram(void)
5928 {
5929 u8 lec = 0;
5930 u8 b_nvram;
5931
5932 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5933 return;
5934
5935 vdbg_printk(TPACPI_DBG_BRGHT,
5936 "trying to checkpoint backlight level to NVRAM...\n");
5937
5938 if (mutex_lock_killable(&brightness_mutex) < 0)
5939 return;
5940
5941 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5942 goto unlock;
5943 lec &= TP_EC_BACKLIGHT_LVLMSK;
5944 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5945
5946 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5947 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5948 /* NVRAM needs update */
5949 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5950 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5951 b_nvram |= lec;
5952 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5953 dbg_printk(TPACPI_DBG_BRGHT,
5954 "updated NVRAM backlight level to %u (0x%02x)\n",
5955 (unsigned int) lec, (unsigned int) b_nvram);
5956 } else
5957 vdbg_printk(TPACPI_DBG_BRGHT,
5958 "NVRAM backlight level already is %u (0x%02x)\n",
5959 (unsigned int) lec, (unsigned int) b_nvram);
5960
5961 unlock:
5962 mutex_unlock(&brightness_mutex);
5963 }
5964
5965
5966 /* call with brightness_mutex held! */
5967 static int tpacpi_brightness_get_raw(int *status)
5968 {
5969 u8 lec = 0;
5970
5971 switch (brightness_mode) {
5972 case TPACPI_BRGHT_MODE_UCMS_STEP:
5973 *status = tpacpi_brightness_nvram_get();
5974 return 0;
5975 case TPACPI_BRGHT_MODE_EC:
5976 case TPACPI_BRGHT_MODE_ECNVRAM:
5977 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5978 return -EIO;
5979 *status = lec;
5980 return 0;
5981 default:
5982 return -ENXIO;
5983 }
5984 }
5985
5986 /* call with brightness_mutex held! */
5987 /* do NOT call with illegal backlight level value */
5988 static int tpacpi_brightness_set_ec(unsigned int value)
5989 {
5990 u8 lec = 0;
5991
5992 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5993 return -EIO;
5994
5995 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5996 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5997 (value & TP_EC_BACKLIGHT_LVLMSK))))
5998 return -EIO;
5999
6000 return 0;
6001 }
6002
6003 /* call with brightness_mutex held! */
6004 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6005 {
6006 int cmos_cmd, inc;
6007 unsigned int current_value, i;
6008
6009 current_value = tpacpi_brightness_nvram_get();
6010
6011 if (value == current_value)
6012 return 0;
6013
6014 cmos_cmd = (value > current_value) ?
6015 TP_CMOS_BRIGHTNESS_UP :
6016 TP_CMOS_BRIGHTNESS_DOWN;
6017 inc = (value > current_value) ? 1 : -1;
6018
6019 for (i = current_value; i != value; i += inc)
6020 if (issue_thinkpad_cmos_command(cmos_cmd))
6021 return -EIO;
6022
6023 return 0;
6024 }
6025
6026 /* May return EINTR which can always be mapped to ERESTARTSYS */
6027 static int brightness_set(unsigned int value)
6028 {
6029 int res;
6030
6031 if (value > bright_maxlvl || value < 0)
6032 return -EINVAL;
6033
6034 vdbg_printk(TPACPI_DBG_BRGHT,
6035 "set backlight level to %d\n", value);
6036
6037 res = mutex_lock_killable(&brightness_mutex);
6038 if (res < 0)
6039 return res;
6040
6041 switch (brightness_mode) {
6042 case TPACPI_BRGHT_MODE_EC:
6043 case TPACPI_BRGHT_MODE_ECNVRAM:
6044 res = tpacpi_brightness_set_ec(value);
6045 break;
6046 case TPACPI_BRGHT_MODE_UCMS_STEP:
6047 res = tpacpi_brightness_set_ucmsstep(value);
6048 break;
6049 default:
6050 res = -ENXIO;
6051 }
6052
6053 mutex_unlock(&brightness_mutex);
6054 return res;
6055 }
6056
6057 /* sysfs backlight class ----------------------------------------------- */
6058
6059 static int brightness_update_status(struct backlight_device *bd)
6060 {
6061 unsigned int level =
6062 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6063 bd->props.power == FB_BLANK_UNBLANK) ?
6064 bd->props.brightness : 0;
6065
6066 dbg_printk(TPACPI_DBG_BRGHT,
6067 "backlight: attempt to set level to %d\n",
6068 level);
6069
6070 /* it is the backlight class's job (caller) to handle
6071 * EINTR and other errors properly */
6072 return brightness_set(level);
6073 }
6074
6075 static int brightness_get(struct backlight_device *bd)
6076 {
6077 int status, res;
6078
6079 res = mutex_lock_killable(&brightness_mutex);
6080 if (res < 0)
6081 return 0;
6082
6083 res = tpacpi_brightness_get_raw(&status);
6084
6085 mutex_unlock(&brightness_mutex);
6086
6087 if (res < 0)
6088 return 0;
6089
6090 return status & TP_EC_BACKLIGHT_LVLMSK;
6091 }
6092
6093 static void tpacpi_brightness_notify_change(void)
6094 {
6095 backlight_force_update(ibm_backlight_device,
6096 BACKLIGHT_UPDATE_HOTKEY);
6097 }
6098
6099 static const struct backlight_ops ibm_backlight_data = {
6100 .get_brightness = brightness_get,
6101 .update_status = brightness_update_status,
6102 };
6103
6104 /* --------------------------------------------------------------------- */
6105
6106 /*
6107 * Call _BCL method of video device. On some ThinkPads this will
6108 * switch the firmware to the ACPI brightness control mode.
6109 */
6110
6111 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6112 {
6113 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6114 union acpi_object *obj;
6115 int rc;
6116
6117 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6118 obj = (union acpi_object *)buffer.pointer;
6119 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6120 pr_err("Unknown _BCL data, please report this to %s\n",
6121 TPACPI_MAIL);
6122 rc = 0;
6123 } else {
6124 rc = obj->package.count;
6125 }
6126 } else {
6127 return 0;
6128 }
6129
6130 kfree(buffer.pointer);
6131 return rc;
6132 }
6133
6134
6135 /*
6136 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6137 */
6138 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6139 {
6140 acpi_handle video_device;
6141 int bcl_levels = 0;
6142
6143 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6144 if (video_device)
6145 bcl_levels = tpacpi_query_bcl_levels(video_device);
6146
6147 tp_features.bright_acpimode = (bcl_levels > 0);
6148
6149 return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6150 }
6151
6152 /*
6153 * These are only useful for models that have only one possibility
6154 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6155 * these quirks.
6156 */
6157 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6158 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6159 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6160
6161 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6162 /* Models with ATI GPUs known to require ECNVRAM mode */
6163 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6164
6165 /* Models with ATI GPUs that can use ECNVRAM */
6166 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */
6167 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6168 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */
6169 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6170
6171 /* Models with Intel Extreme Graphics 2 */
6172 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */
6173 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6174 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6175
6176 /* Models with Intel GMA900 */
6177 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6178 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6179 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6180 };
6181
6182 /*
6183 * Returns < 0 for error, otherwise sets tp_features.bright_*
6184 * and bright_maxlvl.
6185 */
6186 static void __init tpacpi_detect_brightness_capabilities(void)
6187 {
6188 unsigned int b;
6189
6190 vdbg_printk(TPACPI_DBG_INIT,
6191 "detecting firmware brightness interface capabilities\n");
6192
6193 /* we could run a quirks check here (same table used by
6194 * brightness_init) if needed */
6195
6196 /*
6197 * We always attempt to detect acpi support, so as to switch
6198 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6199 * going to publish a backlight interface
6200 */
6201 b = tpacpi_check_std_acpi_brightness_support();
6202 switch (b) {
6203 case 16:
6204 bright_maxlvl = 15;
6205 pr_info("detected a 16-level brightness capable ThinkPad\n");
6206 break;
6207 case 8:
6208 case 0:
6209 bright_maxlvl = 7;
6210 pr_info("detected a 8-level brightness capable ThinkPad\n");
6211 break;
6212 default:
6213 pr_err("Unsupported brightness interface, "
6214 "please contact %s\n", TPACPI_MAIL);
6215 tp_features.bright_unkfw = 1;
6216 bright_maxlvl = b - 1;
6217 }
6218 }
6219
6220 static int __init brightness_init(struct ibm_init_struct *iibm)
6221 {
6222 struct backlight_properties props;
6223 int b;
6224 unsigned long quirks;
6225
6226 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6227
6228 mutex_init(&brightness_mutex);
6229
6230 quirks = tpacpi_check_quirks(brightness_quirk_table,
6231 ARRAY_SIZE(brightness_quirk_table));
6232
6233 /* tpacpi_detect_brightness_capabilities() must have run already */
6234
6235 /* if it is unknown, we don't handle it: it wouldn't be safe */
6236 if (tp_features.bright_unkfw)
6237 return 1;
6238
6239 if (!brightness_enable) {
6240 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6241 "brightness support disabled by "
6242 "module parameter\n");
6243 return 1;
6244 }
6245
6246 if (acpi_video_backlight_support()) {
6247 if (brightness_enable > 1) {
6248 pr_info("Standard ACPI backlight interface "
6249 "available, not loading native one\n");
6250 return 1;
6251 } else if (brightness_enable == 1) {
6252 pr_warn("Cannot enable backlight brightness support, "
6253 "ACPI is already handling it. Refer to the "
6254 "acpi_backlight kernel parameter.\n");
6255 return 1;
6256 }
6257 } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6258 pr_notice("Standard ACPI backlight interface not "
6259 "available, thinkpad_acpi native "
6260 "brightness control enabled\n");
6261 }
6262
6263 /*
6264 * Check for module parameter bogosity, note that we
6265 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6266 * able to detect "unspecified"
6267 */
6268 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6269 return -EINVAL;
6270
6271 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6272 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6273 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6274 if (quirks & TPACPI_BRGHT_Q_EC)
6275 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6276 else
6277 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6278
6279 dbg_printk(TPACPI_DBG_BRGHT,
6280 "driver auto-selected brightness_mode=%d\n",
6281 brightness_mode);
6282 }
6283
6284 /* Safety */
6285 if (!tpacpi_is_ibm() &&
6286 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6287 brightness_mode == TPACPI_BRGHT_MODE_EC))
6288 return -EINVAL;
6289
6290 if (tpacpi_brightness_get_raw(&b) < 0)
6291 return 1;
6292
6293 memset(&props, 0, sizeof(struct backlight_properties));
6294 props.type = BACKLIGHT_PLATFORM;
6295 props.max_brightness = bright_maxlvl;
6296 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6297 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6298 NULL, NULL,
6299 &ibm_backlight_data,
6300 &props);
6301 if (IS_ERR(ibm_backlight_device)) {
6302 int rc = PTR_ERR(ibm_backlight_device);
6303 ibm_backlight_device = NULL;
6304 pr_err("Could not register backlight device\n");
6305 return rc;
6306 }
6307 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6308 "brightness is supported\n");
6309
6310 if (quirks & TPACPI_BRGHT_Q_ASK) {
6311 pr_notice("brightness: will use unverified default: "
6312 "brightness_mode=%d\n", brightness_mode);
6313 pr_notice("brightness: please report to %s whether it works well "
6314 "or not on your ThinkPad\n", TPACPI_MAIL);
6315 }
6316
6317 /* Added by mistake in early 2007. Probably useless, but it could
6318 * be working around some unknown firmware problem where the value
6319 * read at startup doesn't match the real hardware state... so leave
6320 * it in place just in case */
6321 backlight_update_status(ibm_backlight_device);
6322
6323 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6324 "brightness: registering brightness hotkeys "
6325 "as change notification\n");
6326 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6327 | TP_ACPI_HKEY_BRGHTUP_MASK
6328 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6329 return 0;
6330 }
6331
6332 static void brightness_suspend(void)
6333 {
6334 tpacpi_brightness_checkpoint_nvram();
6335 }
6336
6337 static void brightness_shutdown(void)
6338 {
6339 tpacpi_brightness_checkpoint_nvram();
6340 }
6341
6342 static void brightness_exit(void)
6343 {
6344 if (ibm_backlight_device) {
6345 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6346 "calling backlight_device_unregister()\n");
6347 backlight_device_unregister(ibm_backlight_device);
6348 }
6349
6350 tpacpi_brightness_checkpoint_nvram();
6351 }
6352
6353 static int brightness_read(struct seq_file *m)
6354 {
6355 int level;
6356
6357 level = brightness_get(NULL);
6358 if (level < 0) {
6359 seq_printf(m, "level:\t\tunreadable\n");
6360 } else {
6361 seq_printf(m, "level:\t\t%d\n", level);
6362 seq_printf(m, "commands:\tup, down\n");
6363 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6364 bright_maxlvl);
6365 }
6366
6367 return 0;
6368 }
6369
6370 static int brightness_write(char *buf)
6371 {
6372 int level;
6373 int rc;
6374 char *cmd;
6375
6376 level = brightness_get(NULL);
6377 if (level < 0)
6378 return level;
6379
6380 while ((cmd = next_cmd(&buf))) {
6381 if (strlencmp(cmd, "up") == 0) {
6382 if (level < bright_maxlvl)
6383 level++;
6384 } else if (strlencmp(cmd, "down") == 0) {
6385 if (level > 0)
6386 level--;
6387 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6388 level >= 0 && level <= bright_maxlvl) {
6389 /* new level set */
6390 } else
6391 return -EINVAL;
6392 }
6393
6394 tpacpi_disclose_usertask("procfs brightness",
6395 "set level to %d\n", level);
6396
6397 /*
6398 * Now we know what the final level should be, so we try to set it.
6399 * Doing it this way makes the syscall restartable in case of EINTR
6400 */
6401 rc = brightness_set(level);
6402 if (!rc && ibm_backlight_device)
6403 backlight_force_update(ibm_backlight_device,
6404 BACKLIGHT_UPDATE_SYSFS);
6405 return (rc == -EINTR)? -ERESTARTSYS : rc;
6406 }
6407
6408 static struct ibm_struct brightness_driver_data = {
6409 .name = "brightness",
6410 .read = brightness_read,
6411 .write = brightness_write,
6412 .exit = brightness_exit,
6413 .suspend = brightness_suspend,
6414 .shutdown = brightness_shutdown,
6415 };
6416
6417 /*************************************************************************
6418 * Volume subdriver
6419 */
6420
6421 /*
6422 * IBM ThinkPads have a simple volume controller with MUTE gating.
6423 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6424 *
6425 * Since the *61 series (and probably also the later *60 series), Lenovo
6426 * ThinkPads only implement the MUTE gate.
6427 *
6428 * EC register 0x30
6429 * Bit 6: MUTE (1 mutes sound)
6430 * Bit 3-0: Volume
6431 * Other bits should be zero as far as we know.
6432 *
6433 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6434 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6435 * such as bit 7 which is used to detect repeated presses of MUTE,
6436 * and we leave them unchanged.
6437 */
6438
6439 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6440
6441 #define TPACPI_ALSA_DRVNAME "ThinkPad EC"
6442 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6443 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6444
6445 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
6446 static char *alsa_id = "ThinkPadEC";
6447 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
6448
6449 struct tpacpi_alsa_data {
6450 struct snd_card *card;
6451 struct snd_ctl_elem_id *ctl_mute_id;
6452 struct snd_ctl_elem_id *ctl_vol_id;
6453 };
6454
6455 static struct snd_card *alsa_card;
6456
6457 enum {
6458 TP_EC_AUDIO = 0x30,
6459
6460 /* TP_EC_AUDIO bits */
6461 TP_EC_AUDIO_MUTESW = 6,
6462
6463 /* TP_EC_AUDIO bitmasks */
6464 TP_EC_AUDIO_LVL_MSK = 0x0F,
6465 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6466
6467 /* Maximum volume */
6468 TP_EC_VOLUME_MAX = 14,
6469 };
6470
6471 enum tpacpi_volume_access_mode {
6472 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6473 TPACPI_VOL_MODE_EC, /* Pure EC control */
6474 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6475 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6476 TPACPI_VOL_MODE_MAX
6477 };
6478
6479 enum tpacpi_volume_capabilities {
6480 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6481 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6482 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6483 TPACPI_VOL_CAP_MAX
6484 };
6485
6486 static enum tpacpi_volume_access_mode volume_mode =
6487 TPACPI_VOL_MODE_MAX;
6488
6489 static enum tpacpi_volume_capabilities volume_capabilities;
6490 static bool volume_control_allowed;
6491
6492 /*
6493 * Used to syncronize writers to TP_EC_AUDIO and
6494 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6495 */
6496 static struct mutex volume_mutex;
6497
6498 static void tpacpi_volume_checkpoint_nvram(void)
6499 {
6500 u8 lec = 0;
6501 u8 b_nvram;
6502 u8 ec_mask;
6503
6504 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6505 return;
6506 if (!volume_control_allowed)
6507 return;
6508
6509 vdbg_printk(TPACPI_DBG_MIXER,
6510 "trying to checkpoint mixer state to NVRAM...\n");
6511
6512 if (tp_features.mixer_no_level_control)
6513 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6514 else
6515 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6516
6517 if (mutex_lock_killable(&volume_mutex) < 0)
6518 return;
6519
6520 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6521 goto unlock;
6522 lec &= ec_mask;
6523 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6524
6525 if (lec != (b_nvram & ec_mask)) {
6526 /* NVRAM needs update */
6527 b_nvram &= ~ec_mask;
6528 b_nvram |= lec;
6529 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6530 dbg_printk(TPACPI_DBG_MIXER,
6531 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6532 (unsigned int) lec, (unsigned int) b_nvram);
6533 } else {
6534 vdbg_printk(TPACPI_DBG_MIXER,
6535 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6536 (unsigned int) lec, (unsigned int) b_nvram);
6537 }
6538
6539 unlock:
6540 mutex_unlock(&volume_mutex);
6541 }
6542
6543 static int volume_get_status_ec(u8 *status)
6544 {
6545 u8 s;
6546
6547 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6548 return -EIO;
6549
6550 *status = s;
6551
6552 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6553
6554 return 0;
6555 }
6556
6557 static int volume_get_status(u8 *status)
6558 {
6559 return volume_get_status_ec(status);
6560 }
6561
6562 static int volume_set_status_ec(const u8 status)
6563 {
6564 if (!acpi_ec_write(TP_EC_AUDIO, status))
6565 return -EIO;
6566
6567 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6568
6569 return 0;
6570 }
6571
6572 static int volume_set_status(const u8 status)
6573 {
6574 return volume_set_status_ec(status);
6575 }
6576
6577 /* returns < 0 on error, 0 on no change, 1 on change */
6578 static int __volume_set_mute_ec(const bool mute)
6579 {
6580 int rc;
6581 u8 s, n;
6582
6583 if (mutex_lock_killable(&volume_mutex) < 0)
6584 return -EINTR;
6585
6586 rc = volume_get_status_ec(&s);
6587 if (rc)
6588 goto unlock;
6589
6590 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6591 s & ~TP_EC_AUDIO_MUTESW_MSK;
6592
6593 if (n != s) {
6594 rc = volume_set_status_ec(n);
6595 if (!rc)
6596 rc = 1;
6597 }
6598
6599 unlock:
6600 mutex_unlock(&volume_mutex);
6601 return rc;
6602 }
6603
6604 static int volume_alsa_set_mute(const bool mute)
6605 {
6606 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6607 (mute) ? "" : "un");
6608 return __volume_set_mute_ec(mute);
6609 }
6610
6611 static int volume_set_mute(const bool mute)
6612 {
6613 int rc;
6614
6615 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6616 (mute) ? "" : "un");
6617
6618 rc = __volume_set_mute_ec(mute);
6619 return (rc < 0) ? rc : 0;
6620 }
6621
6622 /* returns < 0 on error, 0 on no change, 1 on change */
6623 static int __volume_set_volume_ec(const u8 vol)
6624 {
6625 int rc;
6626 u8 s, n;
6627
6628 if (vol > TP_EC_VOLUME_MAX)
6629 return -EINVAL;
6630
6631 if (mutex_lock_killable(&volume_mutex) < 0)
6632 return -EINTR;
6633
6634 rc = volume_get_status_ec(&s);
6635 if (rc)
6636 goto unlock;
6637
6638 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6639
6640 if (n != s) {
6641 rc = volume_set_status_ec(n);
6642 if (!rc)
6643 rc = 1;
6644 }
6645
6646 unlock:
6647 mutex_unlock(&volume_mutex);
6648 return rc;
6649 }
6650
6651 static int volume_alsa_set_volume(const u8 vol)
6652 {
6653 dbg_printk(TPACPI_DBG_MIXER,
6654 "ALSA: trying to set volume level to %hu\n", vol);
6655 return __volume_set_volume_ec(vol);
6656 }
6657
6658 static void volume_alsa_notify_change(void)
6659 {
6660 struct tpacpi_alsa_data *d;
6661
6662 if (alsa_card && alsa_card->private_data) {
6663 d = alsa_card->private_data;
6664 if (d->ctl_mute_id)
6665 snd_ctl_notify(alsa_card,
6666 SNDRV_CTL_EVENT_MASK_VALUE,
6667 d->ctl_mute_id);
6668 if (d->ctl_vol_id)
6669 snd_ctl_notify(alsa_card,
6670 SNDRV_CTL_EVENT_MASK_VALUE,
6671 d->ctl_vol_id);
6672 }
6673 }
6674
6675 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6676 struct snd_ctl_elem_info *uinfo)
6677 {
6678 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6679 uinfo->count = 1;
6680 uinfo->value.integer.min = 0;
6681 uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6682 return 0;
6683 }
6684
6685 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6686 struct snd_ctl_elem_value *ucontrol)
6687 {
6688 u8 s;
6689 int rc;
6690
6691 rc = volume_get_status(&s);
6692 if (rc < 0)
6693 return rc;
6694
6695 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6696 return 0;
6697 }
6698
6699 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6700 struct snd_ctl_elem_value *ucontrol)
6701 {
6702 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6703 ucontrol->value.integer.value[0]);
6704 return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6705 }
6706
6707 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6708
6709 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6710 struct snd_ctl_elem_value *ucontrol)
6711 {
6712 u8 s;
6713 int rc;
6714
6715 rc = volume_get_status(&s);
6716 if (rc < 0)
6717 return rc;
6718
6719 ucontrol->value.integer.value[0] =
6720 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6721 return 0;
6722 }
6723
6724 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6725 struct snd_ctl_elem_value *ucontrol)
6726 {
6727 tpacpi_disclose_usertask("ALSA", "%smute\n",
6728 ucontrol->value.integer.value[0] ?
6729 "un" : "");
6730 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6731 }
6732
6733 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = {
6734 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6735 .name = "Console Playback Volume",
6736 .index = 0,
6737 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6738 .info = volume_alsa_vol_info,
6739 .get = volume_alsa_vol_get,
6740 };
6741
6742 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = {
6743 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6744 .name = "Console Playback Switch",
6745 .index = 0,
6746 .access = SNDRV_CTL_ELEM_ACCESS_READ,
6747 .info = volume_alsa_mute_info,
6748 .get = volume_alsa_mute_get,
6749 };
6750
6751 static void volume_suspend(void)
6752 {
6753 tpacpi_volume_checkpoint_nvram();
6754 }
6755
6756 static void volume_resume(void)
6757 {
6758 volume_alsa_notify_change();
6759 }
6760
6761 static void volume_shutdown(void)
6762 {
6763 tpacpi_volume_checkpoint_nvram();
6764 }
6765
6766 static void volume_exit(void)
6767 {
6768 if (alsa_card) {
6769 snd_card_free(alsa_card);
6770 alsa_card = NULL;
6771 }
6772
6773 tpacpi_volume_checkpoint_nvram();
6774 }
6775
6776 static int __init volume_create_alsa_mixer(void)
6777 {
6778 struct snd_card *card;
6779 struct tpacpi_alsa_data *data;
6780 struct snd_kcontrol *ctl_vol;
6781 struct snd_kcontrol *ctl_mute;
6782 int rc;
6783
6784 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6785 sizeof(struct tpacpi_alsa_data), &card);
6786 if (rc < 0 || !card) {
6787 pr_err("Failed to create ALSA card structures: %d\n", rc);
6788 return 1;
6789 }
6790
6791 BUG_ON(!card->private_data);
6792 data = card->private_data;
6793 data->card = card;
6794
6795 strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6796 sizeof(card->driver));
6797 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6798 sizeof(card->shortname));
6799 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6800 (thinkpad_id.ec_version_str) ?
6801 thinkpad_id.ec_version_str : "(unknown)");
6802 snprintf(card->longname, sizeof(card->longname),
6803 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6804 (thinkpad_id.ec_version_str) ?
6805 thinkpad_id.ec_version_str : "unknown");
6806
6807 if (volume_control_allowed) {
6808 volume_alsa_control_vol.put = volume_alsa_vol_put;
6809 volume_alsa_control_vol.access =
6810 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6811
6812 volume_alsa_control_mute.put = volume_alsa_mute_put;
6813 volume_alsa_control_mute.access =
6814 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6815 }
6816
6817 if (!tp_features.mixer_no_level_control) {
6818 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6819 rc = snd_ctl_add(card, ctl_vol);
6820 if (rc < 0) {
6821 pr_err("Failed to create ALSA volume control: %d\n",
6822 rc);
6823 goto err_exit;
6824 }
6825 data->ctl_vol_id = &ctl_vol->id;
6826 }
6827
6828 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6829 rc = snd_ctl_add(card, ctl_mute);
6830 if (rc < 0) {
6831 pr_err("Failed to create ALSA mute control: %d\n", rc);
6832 goto err_exit;
6833 }
6834 data->ctl_mute_id = &ctl_mute->id;
6835
6836 snd_card_set_dev(card, &tpacpi_pdev->dev);
6837 rc = snd_card_register(card);
6838 if (rc < 0) {
6839 pr_err("Failed to register ALSA card: %d\n", rc);
6840 goto err_exit;
6841 }
6842
6843 alsa_card = card;
6844 return 0;
6845
6846 err_exit:
6847 snd_card_free(card);
6848 return 1;
6849 }
6850
6851 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6852 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6853
6854 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6855 /* Whitelist volume level on all IBM by default */
6856 { .vendor = PCI_VENDOR_ID_IBM,
6857 .bios = TPACPI_MATCH_ANY,
6858 .ec = TPACPI_MATCH_ANY,
6859 .quirks = TPACPI_VOL_Q_LEVEL },
6860
6861 /* Lenovo models with volume control (needs confirmation) */
6862 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6863 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6864 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6865 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6866 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6867 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6868 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6869
6870 /* Whitelist mute-only on all Lenovo by default */
6871 { .vendor = PCI_VENDOR_ID_LENOVO,
6872 .bios = TPACPI_MATCH_ANY,
6873 .ec = TPACPI_MATCH_ANY,
6874 .quirks = TPACPI_VOL_Q_MUTEONLY }
6875 };
6876
6877 static int __init volume_init(struct ibm_init_struct *iibm)
6878 {
6879 unsigned long quirks;
6880 int rc;
6881
6882 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6883
6884 mutex_init(&volume_mutex);
6885
6886 /*
6887 * Check for module parameter bogosity, note that we
6888 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6889 * able to detect "unspecified"
6890 */
6891 if (volume_mode > TPACPI_VOL_MODE_MAX)
6892 return -EINVAL;
6893
6894 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6895 pr_err("UCMS step volume mode not implemented, "
6896 "please contact %s\n", TPACPI_MAIL);
6897 return 1;
6898 }
6899
6900 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6901 return -EINVAL;
6902
6903 /*
6904 * The ALSA mixer is our primary interface.
6905 * When disabled, don't install the subdriver at all
6906 */
6907 if (!alsa_enable) {
6908 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6909 "ALSA mixer disabled by parameter, "
6910 "not loading volume subdriver...\n");
6911 return 1;
6912 }
6913
6914 quirks = tpacpi_check_quirks(volume_quirk_table,
6915 ARRAY_SIZE(volume_quirk_table));
6916
6917 switch (volume_capabilities) {
6918 case TPACPI_VOL_CAP_AUTO:
6919 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6920 tp_features.mixer_no_level_control = 1;
6921 else if (quirks & TPACPI_VOL_Q_LEVEL)
6922 tp_features.mixer_no_level_control = 0;
6923 else
6924 return 1; /* no mixer */
6925 break;
6926 case TPACPI_VOL_CAP_VOLMUTE:
6927 tp_features.mixer_no_level_control = 0;
6928 break;
6929 case TPACPI_VOL_CAP_MUTEONLY:
6930 tp_features.mixer_no_level_control = 1;
6931 break;
6932 default:
6933 return 1;
6934 }
6935
6936 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6937 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6938 "using user-supplied volume_capabilities=%d\n",
6939 volume_capabilities);
6940
6941 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6942 volume_mode == TPACPI_VOL_MODE_MAX) {
6943 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6944
6945 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6946 "driver auto-selected volume_mode=%d\n",
6947 volume_mode);
6948 } else {
6949 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6950 "using user-supplied volume_mode=%d\n",
6951 volume_mode);
6952 }
6953
6954 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6955 "mute is supported, volume control is %s\n",
6956 str_supported(!tp_features.mixer_no_level_control));
6957
6958 rc = volume_create_alsa_mixer();
6959 if (rc) {
6960 pr_err("Could not create the ALSA mixer interface\n");
6961 return rc;
6962 }
6963
6964 pr_info("Console audio control enabled, mode: %s\n",
6965 (volume_control_allowed) ?
6966 "override (read/write)" :
6967 "monitor (read only)");
6968
6969 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6970 "registering volume hotkeys as change notification\n");
6971 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6972 | TP_ACPI_HKEY_VOLUP_MASK
6973 | TP_ACPI_HKEY_VOLDWN_MASK
6974 | TP_ACPI_HKEY_MUTE_MASK);
6975
6976 return 0;
6977 }
6978
6979 static int volume_read(struct seq_file *m)
6980 {
6981 u8 status;
6982
6983 if (volume_get_status(&status) < 0) {
6984 seq_printf(m, "level:\t\tunreadable\n");
6985 } else {
6986 if (tp_features.mixer_no_level_control)
6987 seq_printf(m, "level:\t\tunsupported\n");
6988 else
6989 seq_printf(m, "level:\t\t%d\n",
6990 status & TP_EC_AUDIO_LVL_MSK);
6991
6992 seq_printf(m, "mute:\t\t%s\n",
6993 onoff(status, TP_EC_AUDIO_MUTESW));
6994
6995 if (volume_control_allowed) {
6996 seq_printf(m, "commands:\tunmute, mute\n");
6997 if (!tp_features.mixer_no_level_control) {
6998 seq_printf(m,
6999 "commands:\tup, down\n");
7000 seq_printf(m,
7001 "commands:\tlevel <level>"
7002 " (<level> is 0-%d)\n",
7003 TP_EC_VOLUME_MAX);
7004 }
7005 }
7006 }
7007
7008 return 0;
7009 }
7010
7011 static int volume_write(char *buf)
7012 {
7013 u8 s;
7014 u8 new_level, new_mute;
7015 int l;
7016 char *cmd;
7017 int rc;
7018
7019 /*
7020 * We do allow volume control at driver startup, so that the
7021 * user can set initial state through the volume=... parameter hack.
7022 */
7023 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7024 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7025 tp_warned.volume_ctrl_forbidden = 1;
7026 pr_notice("Console audio control in monitor mode, "
7027 "changes are not allowed\n");
7028 pr_notice("Use the volume_control=1 module parameter "
7029 "to enable volume control\n");
7030 }
7031 return -EPERM;
7032 }
7033
7034 rc = volume_get_status(&s);
7035 if (rc < 0)
7036 return rc;
7037
7038 new_level = s & TP_EC_AUDIO_LVL_MSK;
7039 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
7040
7041 while ((cmd = next_cmd(&buf))) {
7042 if (!tp_features.mixer_no_level_control) {
7043 if (strlencmp(cmd, "up") == 0) {
7044 if (new_mute)
7045 new_mute = 0;
7046 else if (new_level < TP_EC_VOLUME_MAX)
7047 new_level++;
7048 continue;
7049 } else if (strlencmp(cmd, "down") == 0) {
7050 if (new_mute)
7051 new_mute = 0;
7052 else if (new_level > 0)
7053 new_level--;
7054 continue;
7055 } else if (sscanf(cmd, "level %u", &l) == 1 &&
7056 l >= 0 && l <= TP_EC_VOLUME_MAX) {
7057 new_level = l;
7058 continue;
7059 }
7060 }
7061 if (strlencmp(cmd, "mute") == 0)
7062 new_mute = TP_EC_AUDIO_MUTESW_MSK;
7063 else if (strlencmp(cmd, "unmute") == 0)
7064 new_mute = 0;
7065 else
7066 return -EINVAL;
7067 }
7068
7069 if (tp_features.mixer_no_level_control) {
7070 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7071 new_mute ? "" : "un");
7072 rc = volume_set_mute(!!new_mute);
7073 } else {
7074 tpacpi_disclose_usertask("procfs volume",
7075 "%smute and set level to %d\n",
7076 new_mute ? "" : "un", new_level);
7077 rc = volume_set_status(new_mute | new_level);
7078 }
7079 volume_alsa_notify_change();
7080
7081 return (rc == -EINTR) ? -ERESTARTSYS : rc;
7082 }
7083
7084 static struct ibm_struct volume_driver_data = {
7085 .name = "volume",
7086 .read = volume_read,
7087 .write = volume_write,
7088 .exit = volume_exit,
7089 .suspend = volume_suspend,
7090 .resume = volume_resume,
7091 .shutdown = volume_shutdown,
7092 };
7093
7094 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7095
7096 #define alsa_card NULL
7097
7098 static void inline volume_alsa_notify_change(void)
7099 {
7100 }
7101
7102 static int __init volume_init(struct ibm_init_struct *iibm)
7103 {
7104 pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7105
7106 return 1;
7107 }
7108
7109 static struct ibm_struct volume_driver_data = {
7110 .name = "volume",
7111 };
7112
7113 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7114
7115 /*************************************************************************
7116 * Fan subdriver
7117 */
7118
7119 /*
7120 * FAN ACCESS MODES
7121 *
7122 * TPACPI_FAN_RD_ACPI_GFAN:
7123 * ACPI GFAN method: returns fan level
7124 *
7125 * see TPACPI_FAN_WR_ACPI_SFAN
7126 * EC 0x2f (HFSP) not available if GFAN exists
7127 *
7128 * TPACPI_FAN_WR_ACPI_SFAN:
7129 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7130 *
7131 * EC 0x2f (HFSP) might be available *for reading*, but do not use
7132 * it for writing.
7133 *
7134 * TPACPI_FAN_WR_TPEC:
7135 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
7136 * Supported on almost all ThinkPads
7137 *
7138 * Fan speed changes of any sort (including those caused by the
7139 * disengaged mode) are usually done slowly by the firmware as the
7140 * maximum amount of fan duty cycle change per second seems to be
7141 * limited.
7142 *
7143 * Reading is not available if GFAN exists.
7144 * Writing is not available if SFAN exists.
7145 *
7146 * Bits
7147 * 7 automatic mode engaged;
7148 * (default operation mode of the ThinkPad)
7149 * fan level is ignored in this mode.
7150 * 6 full speed mode (takes precedence over bit 7);
7151 * not available on all thinkpads. May disable
7152 * the tachometer while the fan controller ramps up
7153 * the speed (which can take up to a few *minutes*).
7154 * Speeds up fan to 100% duty-cycle, which is far above
7155 * the standard RPM levels. It is not impossible that
7156 * it could cause hardware damage.
7157 * 5-3 unused in some models. Extra bits for fan level
7158 * in others, but still useless as all values above
7159 * 7 map to the same speed as level 7 in these models.
7160 * 2-0 fan level (0..7 usually)
7161 * 0x00 = stop
7162 * 0x07 = max (set when temperatures critical)
7163 * Some ThinkPads may have other levels, see
7164 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7165 *
7166 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7167 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7168 * does so, its initial value is meaningless (0x07).
7169 *
7170 * For firmware bugs, refer to:
7171 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7172 *
7173 * ----
7174 *
7175 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7176 * Main fan tachometer reading (in RPM)
7177 *
7178 * This register is present on all ThinkPads with a new-style EC, and
7179 * it is known not to be present on the A21m/e, and T22, as there is
7180 * something else in offset 0x84 according to the ACPI DSDT. Other
7181 * ThinkPads from this same time period (and earlier) probably lack the
7182 * tachometer as well.
7183 *
7184 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7185 * was never fixed by IBM to report the EC firmware version string
7186 * probably support the tachometer (like the early X models), so
7187 * detecting it is quite hard. We need more data to know for sure.
7188 *
7189 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7190 * might result.
7191 *
7192 * FIRMWARE BUG: may go stale while the EC is switching to full speed
7193 * mode.
7194 *
7195 * For firmware bugs, refer to:
7196 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7197 *
7198 * ----
7199 *
7200 * ThinkPad EC register 0x31 bit 0 (only on select models)
7201 *
7202 * When bit 0 of EC register 0x31 is zero, the tachometer registers
7203 * show the speed of the main fan. When bit 0 of EC register 0x31
7204 * is one, the tachometer registers show the speed of the auxiliary
7205 * fan.
7206 *
7207 * Fan control seems to affect both fans, regardless of the state
7208 * of this bit.
7209 *
7210 * So far, only the firmware for the X60/X61 non-tablet versions
7211 * seem to support this (firmware TP-7M).
7212 *
7213 * TPACPI_FAN_WR_ACPI_FANS:
7214 * ThinkPad X31, X40, X41. Not available in the X60.
7215 *
7216 * FANS ACPI handle: takes three arguments: low speed, medium speed,
7217 * high speed. ACPI DSDT seems to map these three speeds to levels
7218 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7219 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7220 *
7221 * The speeds are stored on handles
7222 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7223 *
7224 * There are three default speed sets, accessible as handles:
7225 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7226 *
7227 * ACPI DSDT switches which set is in use depending on various
7228 * factors.
7229 *
7230 * TPACPI_FAN_WR_TPEC is also available and should be used to
7231 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
7232 * but the ACPI tables just mention level 7.
7233 */
7234
7235 enum { /* Fan control constants */
7236 fan_status_offset = 0x2f, /* EC register 0x2f */
7237 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
7238 * 0x84 must be read before 0x85 */
7239 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
7240 bit 0 selects which fan is active */
7241
7242 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
7243 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
7244
7245 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
7246 };
7247
7248 enum fan_status_access_mode {
7249 TPACPI_FAN_NONE = 0, /* No fan status or control */
7250 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
7251 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7252 };
7253
7254 enum fan_control_access_mode {
7255 TPACPI_FAN_WR_NONE = 0, /* No fan control */
7256 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
7257 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
7258 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
7259 };
7260
7261 enum fan_control_commands {
7262 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
7263 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
7264 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
7265 * and also watchdog cmd */
7266 };
7267
7268 static bool fan_control_allowed;
7269
7270 static enum fan_status_access_mode fan_status_access_mode;
7271 static enum fan_control_access_mode fan_control_access_mode;
7272 static enum fan_control_commands fan_control_commands;
7273
7274 static u8 fan_control_initial_status;
7275 static u8 fan_control_desired_level;
7276 static u8 fan_control_resume_level;
7277 static int fan_watchdog_maxinterval;
7278
7279 static struct mutex fan_mutex;
7280
7281 static void fan_watchdog_fire(struct work_struct *ignored);
7282 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7283
7284 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
7285 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7286 "\\FSPD", /* 600e/x, 770e, 770x */
7287 ); /* all others */
7288 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7289 "JFNS", /* 770x-JL */
7290 ); /* all others */
7291
7292 /*
7293 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7294 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7295 * be in auto mode (0x80).
7296 *
7297 * This is corrected by any write to HFSP either by the driver, or
7298 * by the firmware.
7299 *
7300 * We assume 0x07 really means auto mode while this quirk is active,
7301 * as this is far more likely than the ThinkPad being in level 7,
7302 * which is only used by the firmware during thermal emergencies.
7303 *
7304 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7305 * TP-70 (T43, R52), which are known to be buggy.
7306 */
7307
7308 static void fan_quirk1_setup(void)
7309 {
7310 if (fan_control_initial_status == 0x07) {
7311 pr_notice("fan_init: initial fan status is unknown, "
7312 "assuming it is in auto mode\n");
7313 tp_features.fan_ctrl_status_undef = 1;
7314 }
7315 }
7316
7317 static void fan_quirk1_handle(u8 *fan_status)
7318 {
7319 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7320 if (*fan_status != fan_control_initial_status) {
7321 /* something changed the HFSP regisnter since
7322 * driver init time, so it is not undefined
7323 * anymore */
7324 tp_features.fan_ctrl_status_undef = 0;
7325 } else {
7326 /* Return most likely status. In fact, it
7327 * might be the only possible status */
7328 *fan_status = TP_EC_FAN_AUTO;
7329 }
7330 }
7331 }
7332
7333 /* Select main fan on X60/X61, NOOP on others */
7334 static bool fan_select_fan1(void)
7335 {
7336 if (tp_features.second_fan) {
7337 u8 val;
7338
7339 if (ec_read(fan_select_offset, &val) < 0)
7340 return false;
7341 val &= 0xFEU;
7342 if (ec_write(fan_select_offset, val) < 0)
7343 return false;
7344 }
7345 return true;
7346 }
7347
7348 /* Select secondary fan on X60/X61 */
7349 static bool fan_select_fan2(void)
7350 {
7351 u8 val;
7352
7353 if (!tp_features.second_fan)
7354 return false;
7355
7356 if (ec_read(fan_select_offset, &val) < 0)
7357 return false;
7358 val |= 0x01U;
7359 if (ec_write(fan_select_offset, val) < 0)
7360 return false;
7361
7362 return true;
7363 }
7364
7365 /*
7366 * Call with fan_mutex held
7367 */
7368 static void fan_update_desired_level(u8 status)
7369 {
7370 if ((status &
7371 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7372 if (status > 7)
7373 fan_control_desired_level = 7;
7374 else
7375 fan_control_desired_level = status;
7376 }
7377 }
7378
7379 static int fan_get_status(u8 *status)
7380 {
7381 u8 s;
7382
7383 /* TODO:
7384 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7385
7386 switch (fan_status_access_mode) {
7387 case TPACPI_FAN_RD_ACPI_GFAN:
7388 /* 570, 600e/x, 770e, 770x */
7389
7390 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
7391 return -EIO;
7392
7393 if (likely(status))
7394 *status = s & 0x07;
7395
7396 break;
7397
7398 case TPACPI_FAN_RD_TPEC:
7399 /* all except 570, 600e/x, 770e, 770x */
7400 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7401 return -EIO;
7402
7403 if (likely(status)) {
7404 *status = s;
7405 fan_quirk1_handle(status);
7406 }
7407
7408 break;
7409
7410 default:
7411 return -ENXIO;
7412 }
7413
7414 return 0;
7415 }
7416
7417 static int fan_get_status_safe(u8 *status)
7418 {
7419 int rc;
7420 u8 s;
7421
7422 if (mutex_lock_killable(&fan_mutex))
7423 return -ERESTARTSYS;
7424 rc = fan_get_status(&s);
7425 if (!rc)
7426 fan_update_desired_level(s);
7427 mutex_unlock(&fan_mutex);
7428
7429 if (status)
7430 *status = s;
7431
7432 return rc;
7433 }
7434
7435 static int fan_get_speed(unsigned int *speed)
7436 {
7437 u8 hi, lo;
7438
7439 switch (fan_status_access_mode) {
7440 case TPACPI_FAN_RD_TPEC:
7441 /* all except 570, 600e/x, 770e, 770x */
7442 if (unlikely(!fan_select_fan1()))
7443 return -EIO;
7444 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7445 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7446 return -EIO;
7447
7448 if (likely(speed))
7449 *speed = (hi << 8) | lo;
7450
7451 break;
7452
7453 default:
7454 return -ENXIO;
7455 }
7456
7457 return 0;
7458 }
7459
7460 static int fan2_get_speed(unsigned int *speed)
7461 {
7462 u8 hi, lo;
7463 bool rc;
7464
7465 switch (fan_status_access_mode) {
7466 case TPACPI_FAN_RD_TPEC:
7467 /* all except 570, 600e/x, 770e, 770x */
7468 if (unlikely(!fan_select_fan2()))
7469 return -EIO;
7470 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7471 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7472 fan_select_fan1(); /* play it safe */
7473 if (rc)
7474 return -EIO;
7475
7476 if (likely(speed))
7477 *speed = (hi << 8) | lo;
7478
7479 break;
7480
7481 default:
7482 return -ENXIO;
7483 }
7484
7485 return 0;
7486 }
7487
7488 static int fan_set_level(int level)
7489 {
7490 if (!fan_control_allowed)
7491 return -EPERM;
7492
7493 switch (fan_control_access_mode) {
7494 case TPACPI_FAN_WR_ACPI_SFAN:
7495 if (level >= 0 && level <= 7) {
7496 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7497 return -EIO;
7498 } else
7499 return -EINVAL;
7500 break;
7501
7502 case TPACPI_FAN_WR_ACPI_FANS:
7503 case TPACPI_FAN_WR_TPEC:
7504 if (!(level & TP_EC_FAN_AUTO) &&
7505 !(level & TP_EC_FAN_FULLSPEED) &&
7506 ((level < 0) || (level > 7)))
7507 return -EINVAL;
7508
7509 /* safety net should the EC not support AUTO
7510 * or FULLSPEED mode bits and just ignore them */
7511 if (level & TP_EC_FAN_FULLSPEED)
7512 level |= 7; /* safety min speed 7 */
7513 else if (level & TP_EC_FAN_AUTO)
7514 level |= 4; /* safety min speed 4 */
7515
7516 if (!acpi_ec_write(fan_status_offset, level))
7517 return -EIO;
7518 else
7519 tp_features.fan_ctrl_status_undef = 0;
7520 break;
7521
7522 default:
7523 return -ENXIO;
7524 }
7525
7526 vdbg_printk(TPACPI_DBG_FAN,
7527 "fan control: set fan control register to 0x%02x\n", level);
7528 return 0;
7529 }
7530
7531 static int fan_set_level_safe(int level)
7532 {
7533 int rc;
7534
7535 if (!fan_control_allowed)
7536 return -EPERM;
7537
7538 if (mutex_lock_killable(&fan_mutex))
7539 return -ERESTARTSYS;
7540
7541 if (level == TPACPI_FAN_LAST_LEVEL)
7542 level = fan_control_desired_level;
7543
7544 rc = fan_set_level(level);
7545 if (!rc)
7546 fan_update_desired_level(level);
7547
7548 mutex_unlock(&fan_mutex);
7549 return rc;
7550 }
7551
7552 static int fan_set_enable(void)
7553 {
7554 u8 s;
7555 int rc;
7556
7557 if (!fan_control_allowed)
7558 return -EPERM;
7559
7560 if (mutex_lock_killable(&fan_mutex))
7561 return -ERESTARTSYS;
7562
7563 switch (fan_control_access_mode) {
7564 case TPACPI_FAN_WR_ACPI_FANS:
7565 case TPACPI_FAN_WR_TPEC:
7566 rc = fan_get_status(&s);
7567 if (rc < 0)
7568 break;
7569
7570 /* Don't go out of emergency fan mode */
7571 if (s != 7) {
7572 s &= 0x07;
7573 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7574 }
7575
7576 if (!acpi_ec_write(fan_status_offset, s))
7577 rc = -EIO;
7578 else {
7579 tp_features.fan_ctrl_status_undef = 0;
7580 rc = 0;
7581 }
7582 break;
7583
7584 case TPACPI_FAN_WR_ACPI_SFAN:
7585 rc = fan_get_status(&s);
7586 if (rc < 0)
7587 break;
7588
7589 s &= 0x07;
7590
7591 /* Set fan to at least level 4 */
7592 s |= 4;
7593
7594 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7595 rc = -EIO;
7596 else
7597 rc = 0;
7598 break;
7599
7600 default:
7601 rc = -ENXIO;
7602 }
7603
7604 mutex_unlock(&fan_mutex);
7605
7606 if (!rc)
7607 vdbg_printk(TPACPI_DBG_FAN,
7608 "fan control: set fan control register to 0x%02x\n",
7609 s);
7610 return rc;
7611 }
7612
7613 static int fan_set_disable(void)
7614 {
7615 int rc;
7616
7617 if (!fan_control_allowed)
7618 return -EPERM;
7619
7620 if (mutex_lock_killable(&fan_mutex))
7621 return -ERESTARTSYS;
7622
7623 rc = 0;
7624 switch (fan_control_access_mode) {
7625 case TPACPI_FAN_WR_ACPI_FANS:
7626 case TPACPI_FAN_WR_TPEC:
7627 if (!acpi_ec_write(fan_status_offset, 0x00))
7628 rc = -EIO;
7629 else {
7630 fan_control_desired_level = 0;
7631 tp_features.fan_ctrl_status_undef = 0;
7632 }
7633 break;
7634
7635 case TPACPI_FAN_WR_ACPI_SFAN:
7636 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7637 rc = -EIO;
7638 else
7639 fan_control_desired_level = 0;
7640 break;
7641
7642 default:
7643 rc = -ENXIO;
7644 }
7645
7646 if (!rc)
7647 vdbg_printk(TPACPI_DBG_FAN,
7648 "fan control: set fan control register to 0\n");
7649
7650 mutex_unlock(&fan_mutex);
7651 return rc;
7652 }
7653
7654 static int fan_set_speed(int speed)
7655 {
7656 int rc;
7657
7658 if (!fan_control_allowed)
7659 return -EPERM;
7660
7661 if (mutex_lock_killable(&fan_mutex))
7662 return -ERESTARTSYS;
7663
7664 rc = 0;
7665 switch (fan_control_access_mode) {
7666 case TPACPI_FAN_WR_ACPI_FANS:
7667 if (speed >= 0 && speed <= 65535) {
7668 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7669 speed, speed, speed))
7670 rc = -EIO;
7671 } else
7672 rc = -EINVAL;
7673 break;
7674
7675 default:
7676 rc = -ENXIO;
7677 }
7678
7679 mutex_unlock(&fan_mutex);
7680 return rc;
7681 }
7682
7683 static void fan_watchdog_reset(void)
7684 {
7685 static int fan_watchdog_active;
7686
7687 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7688 return;
7689
7690 if (fan_watchdog_active)
7691 cancel_delayed_work(&fan_watchdog_task);
7692
7693 if (fan_watchdog_maxinterval > 0 &&
7694 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7695 fan_watchdog_active = 1;
7696 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7697 msecs_to_jiffies(fan_watchdog_maxinterval
7698 * 1000))) {
7699 pr_err("failed to queue the fan watchdog, "
7700 "watchdog will not trigger\n");
7701 }
7702 } else
7703 fan_watchdog_active = 0;
7704 }
7705
7706 static void fan_watchdog_fire(struct work_struct *ignored)
7707 {
7708 int rc;
7709
7710 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7711 return;
7712
7713 pr_notice("fan watchdog: enabling fan\n");
7714 rc = fan_set_enable();
7715 if (rc < 0) {
7716 pr_err("fan watchdog: error %d while enabling fan, "
7717 "will try again later...\n", -rc);
7718 /* reschedule for later */
7719 fan_watchdog_reset();
7720 }
7721 }
7722
7723 /*
7724 * SYSFS fan layout: hwmon compatible (device)
7725 *
7726 * pwm*_enable:
7727 * 0: "disengaged" mode
7728 * 1: manual mode
7729 * 2: native EC "auto" mode (recommended, hardware default)
7730 *
7731 * pwm*: set speed in manual mode, ignored otherwise.
7732 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7733 * interpolation.
7734 *
7735 * fan*_input: tachometer reading, RPM
7736 *
7737 *
7738 * SYSFS fan layout: extensions
7739 *
7740 * fan_watchdog (driver):
7741 * fan watchdog interval in seconds, 0 disables (default), max 120
7742 */
7743
7744 /* sysfs fan pwm1_enable ----------------------------------------------- */
7745 static ssize_t fan_pwm1_enable_show(struct device *dev,
7746 struct device_attribute *attr,
7747 char *buf)
7748 {
7749 int res, mode;
7750 u8 status;
7751
7752 res = fan_get_status_safe(&status);
7753 if (res)
7754 return res;
7755
7756 if (status & TP_EC_FAN_FULLSPEED) {
7757 mode = 0;
7758 } else if (status & TP_EC_FAN_AUTO) {
7759 mode = 2;
7760 } else
7761 mode = 1;
7762
7763 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7764 }
7765
7766 static ssize_t fan_pwm1_enable_store(struct device *dev,
7767 struct device_attribute *attr,
7768 const char *buf, size_t count)
7769 {
7770 unsigned long t;
7771 int res, level;
7772
7773 if (parse_strtoul(buf, 2, &t))
7774 return -EINVAL;
7775
7776 tpacpi_disclose_usertask("hwmon pwm1_enable",
7777 "set fan mode to %lu\n", t);
7778
7779 switch (t) {
7780 case 0:
7781 level = TP_EC_FAN_FULLSPEED;
7782 break;
7783 case 1:
7784 level = TPACPI_FAN_LAST_LEVEL;
7785 break;
7786 case 2:
7787 level = TP_EC_FAN_AUTO;
7788 break;
7789 case 3:
7790 /* reserved for software-controlled auto mode */
7791 return -ENOSYS;
7792 default:
7793 return -EINVAL;
7794 }
7795
7796 res = fan_set_level_safe(level);
7797 if (res == -ENXIO)
7798 return -EINVAL;
7799 else if (res < 0)
7800 return res;
7801
7802 fan_watchdog_reset();
7803
7804 return count;
7805 }
7806
7807 static struct device_attribute dev_attr_fan_pwm1_enable =
7808 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7809 fan_pwm1_enable_show, fan_pwm1_enable_store);
7810
7811 /* sysfs fan pwm1 ------------------------------------------------------ */
7812 static ssize_t fan_pwm1_show(struct device *dev,
7813 struct device_attribute *attr,
7814 char *buf)
7815 {
7816 int res;
7817 u8 status;
7818
7819 res = fan_get_status_safe(&status);
7820 if (res)
7821 return res;
7822
7823 if ((status &
7824 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7825 status = fan_control_desired_level;
7826
7827 if (status > 7)
7828 status = 7;
7829
7830 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7831 }
7832
7833 static ssize_t fan_pwm1_store(struct device *dev,
7834 struct device_attribute *attr,
7835 const char *buf, size_t count)
7836 {
7837 unsigned long s;
7838 int rc;
7839 u8 status, newlevel;
7840
7841 if (parse_strtoul(buf, 255, &s))
7842 return -EINVAL;
7843
7844 tpacpi_disclose_usertask("hwmon pwm1",
7845 "set fan speed to %lu\n", s);
7846
7847 /* scale down from 0-255 to 0-7 */
7848 newlevel = (s >> 5) & 0x07;
7849
7850 if (mutex_lock_killable(&fan_mutex))
7851 return -ERESTARTSYS;
7852
7853 rc = fan_get_status(&status);
7854 if (!rc && (status &
7855 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7856 rc = fan_set_level(newlevel);
7857 if (rc == -ENXIO)
7858 rc = -EINVAL;
7859 else if (!rc) {
7860 fan_update_desired_level(newlevel);
7861 fan_watchdog_reset();
7862 }
7863 }
7864
7865 mutex_unlock(&fan_mutex);
7866 return (rc)? rc : count;
7867 }
7868
7869 static struct device_attribute dev_attr_fan_pwm1 =
7870 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7871 fan_pwm1_show, fan_pwm1_store);
7872
7873 /* sysfs fan fan1_input ------------------------------------------------ */
7874 static ssize_t fan_fan1_input_show(struct device *dev,
7875 struct device_attribute *attr,
7876 char *buf)
7877 {
7878 int res;
7879 unsigned int speed;
7880
7881 res = fan_get_speed(&speed);
7882 if (res < 0)
7883 return res;
7884
7885 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7886 }
7887
7888 static struct device_attribute dev_attr_fan_fan1_input =
7889 __ATTR(fan1_input, S_IRUGO,
7890 fan_fan1_input_show, NULL);
7891
7892 /* sysfs fan fan2_input ------------------------------------------------ */
7893 static ssize_t fan_fan2_input_show(struct device *dev,
7894 struct device_attribute *attr,
7895 char *buf)
7896 {
7897 int res;
7898 unsigned int speed;
7899
7900 res = fan2_get_speed(&speed);
7901 if (res < 0)
7902 return res;
7903
7904 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7905 }
7906
7907 static struct device_attribute dev_attr_fan_fan2_input =
7908 __ATTR(fan2_input, S_IRUGO,
7909 fan_fan2_input_show, NULL);
7910
7911 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7912 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7913 char *buf)
7914 {
7915 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7916 }
7917
7918 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7919 const char *buf, size_t count)
7920 {
7921 unsigned long t;
7922
7923 if (parse_strtoul(buf, 120, &t))
7924 return -EINVAL;
7925
7926 if (!fan_control_allowed)
7927 return -EPERM;
7928
7929 fan_watchdog_maxinterval = t;
7930 fan_watchdog_reset();
7931
7932 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7933
7934 return count;
7935 }
7936
7937 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7938 fan_fan_watchdog_show, fan_fan_watchdog_store);
7939
7940 /* --------------------------------------------------------------------- */
7941 static struct attribute *fan_attributes[] = {
7942 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7943 &dev_attr_fan_fan1_input.attr,
7944 NULL, /* for fan2_input */
7945 NULL
7946 };
7947
7948 static const struct attribute_group fan_attr_group = {
7949 .attrs = fan_attributes,
7950 };
7951
7952 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7953 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7954
7955 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7956 { .vendor = PCI_VENDOR_ID_IBM, \
7957 .bios = TPACPI_MATCH_ANY, \
7958 .ec = TPID(__id1, __id2), \
7959 .quirks = __quirks }
7960
7961 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7962 { .vendor = PCI_VENDOR_ID_LENOVO, \
7963 .bios = TPACPI_MATCH_ANY, \
7964 .ec = TPID(__id1, __id2), \
7965 .quirks = __quirks }
7966
7967 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7968 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7969 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7970 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7971 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7972 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7973 };
7974
7975 #undef TPACPI_FAN_QL
7976 #undef TPACPI_FAN_QI
7977
7978 static int __init fan_init(struct ibm_init_struct *iibm)
7979 {
7980 int rc;
7981 unsigned long quirks;
7982
7983 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7984 "initializing fan subdriver\n");
7985
7986 mutex_init(&fan_mutex);
7987 fan_status_access_mode = TPACPI_FAN_NONE;
7988 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7989 fan_control_commands = 0;
7990 fan_watchdog_maxinterval = 0;
7991 tp_features.fan_ctrl_status_undef = 0;
7992 tp_features.second_fan = 0;
7993 fan_control_desired_level = 7;
7994
7995 if (tpacpi_is_ibm()) {
7996 TPACPI_ACPIHANDLE_INIT(fans);
7997 TPACPI_ACPIHANDLE_INIT(gfan);
7998 TPACPI_ACPIHANDLE_INIT(sfan);
7999 }
8000
8001 quirks = tpacpi_check_quirks(fan_quirk_table,
8002 ARRAY_SIZE(fan_quirk_table));
8003
8004 if (gfan_handle) {
8005 /* 570, 600e/x, 770e, 770x */
8006 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8007 } else {
8008 /* all other ThinkPads: note that even old-style
8009 * ThinkPad ECs supports the fan control register */
8010 if (likely(acpi_ec_read(fan_status_offset,
8011 &fan_control_initial_status))) {
8012 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8013 if (quirks & TPACPI_FAN_Q1)
8014 fan_quirk1_setup();
8015 if (quirks & TPACPI_FAN_2FAN) {
8016 tp_features.second_fan = 1;
8017 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8018 "secondary fan support enabled\n");
8019 }
8020 } else {
8021 pr_err("ThinkPad ACPI EC access misbehaving, "
8022 "fan status and control unavailable\n");
8023 return 1;
8024 }
8025 }
8026
8027 if (sfan_handle) {
8028 /* 570, 770x-JL */
8029 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8030 fan_control_commands |=
8031 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8032 } else {
8033 if (!gfan_handle) {
8034 /* gfan without sfan means no fan control */
8035 /* all other models implement TP EC 0x2f control */
8036
8037 if (fans_handle) {
8038 /* X31, X40, X41 */
8039 fan_control_access_mode =
8040 TPACPI_FAN_WR_ACPI_FANS;
8041 fan_control_commands |=
8042 TPACPI_FAN_CMD_SPEED |
8043 TPACPI_FAN_CMD_LEVEL |
8044 TPACPI_FAN_CMD_ENABLE;
8045 } else {
8046 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8047 fan_control_commands |=
8048 TPACPI_FAN_CMD_LEVEL |
8049 TPACPI_FAN_CMD_ENABLE;
8050 }
8051 }
8052 }
8053
8054 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8055 "fan is %s, modes %d, %d\n",
8056 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8057 fan_control_access_mode != TPACPI_FAN_WR_NONE),
8058 fan_status_access_mode, fan_control_access_mode);
8059
8060 /* fan control master switch */
8061 if (!fan_control_allowed) {
8062 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8063 fan_control_commands = 0;
8064 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8065 "fan control features disabled by parameter\n");
8066 }
8067
8068 /* update fan_control_desired_level */
8069 if (fan_status_access_mode != TPACPI_FAN_NONE)
8070 fan_get_status_safe(NULL);
8071
8072 if (fan_status_access_mode != TPACPI_FAN_NONE ||
8073 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8074 if (tp_features.second_fan) {
8075 /* attach second fan tachometer */
8076 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8077 &dev_attr_fan_fan2_input.attr;
8078 }
8079 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8080 &fan_attr_group);
8081 if (rc < 0)
8082 return rc;
8083
8084 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8085 &driver_attr_fan_watchdog);
8086 if (rc < 0) {
8087 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8088 &fan_attr_group);
8089 return rc;
8090 }
8091 return 0;
8092 } else
8093 return 1;
8094 }
8095
8096 static void fan_exit(void)
8097 {
8098 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8099 "cancelling any pending fan watchdog tasks\n");
8100
8101 /* FIXME: can we really do this unconditionally? */
8102 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8103 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8104 &driver_attr_fan_watchdog);
8105
8106 cancel_delayed_work(&fan_watchdog_task);
8107 flush_workqueue(tpacpi_wq);
8108 }
8109
8110 static void fan_suspend(void)
8111 {
8112 int rc;
8113
8114 if (!fan_control_allowed)
8115 return;
8116
8117 /* Store fan status in cache */
8118 fan_control_resume_level = 0;
8119 rc = fan_get_status_safe(&fan_control_resume_level);
8120 if (rc < 0)
8121 pr_notice("failed to read fan level for later "
8122 "restore during resume: %d\n", rc);
8123
8124 /* if it is undefined, don't attempt to restore it.
8125 * KEEP THIS LAST */
8126 if (tp_features.fan_ctrl_status_undef)
8127 fan_control_resume_level = 0;
8128 }
8129
8130 static void fan_resume(void)
8131 {
8132 u8 current_level = 7;
8133 bool do_set = false;
8134 int rc;
8135
8136 /* DSDT *always* updates status on resume */
8137 tp_features.fan_ctrl_status_undef = 0;
8138
8139 if (!fan_control_allowed ||
8140 !fan_control_resume_level ||
8141 (fan_get_status_safe(&current_level) < 0))
8142 return;
8143
8144 switch (fan_control_access_mode) {
8145 case TPACPI_FAN_WR_ACPI_SFAN:
8146 /* never decrease fan level */
8147 do_set = (fan_control_resume_level > current_level);
8148 break;
8149 case TPACPI_FAN_WR_ACPI_FANS:
8150 case TPACPI_FAN_WR_TPEC:
8151 /* never decrease fan level, scale is:
8152 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8153 *
8154 * We expect the firmware to set either 7 or AUTO, but we
8155 * handle FULLSPEED out of paranoia.
8156 *
8157 * So, we can safely only restore FULLSPEED or 7, anything
8158 * else could slow the fan. Restoring AUTO is useless, at
8159 * best that's exactly what the DSDT already set (it is the
8160 * slower it uses).
8161 *
8162 * Always keep in mind that the DSDT *will* have set the
8163 * fans to what the vendor supposes is the best level. We
8164 * muck with it only to speed the fan up.
8165 */
8166 if (fan_control_resume_level != 7 &&
8167 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8168 return;
8169 else
8170 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8171 (current_level != fan_control_resume_level);
8172 break;
8173 default:
8174 return;
8175 }
8176 if (do_set) {
8177 pr_notice("restoring fan level to 0x%02x\n",
8178 fan_control_resume_level);
8179 rc = fan_set_level_safe(fan_control_resume_level);
8180 if (rc < 0)
8181 pr_notice("failed to restore fan level: %d\n", rc);
8182 }
8183 }
8184
8185 static int fan_read(struct seq_file *m)
8186 {
8187 int rc;
8188 u8 status;
8189 unsigned int speed = 0;
8190
8191 switch (fan_status_access_mode) {
8192 case TPACPI_FAN_RD_ACPI_GFAN:
8193 /* 570, 600e/x, 770e, 770x */
8194 rc = fan_get_status_safe(&status);
8195 if (rc < 0)
8196 return rc;
8197
8198 seq_printf(m, "status:\t\t%s\n"
8199 "level:\t\t%d\n",
8200 (status != 0) ? "enabled" : "disabled", status);
8201 break;
8202
8203 case TPACPI_FAN_RD_TPEC:
8204 /* all except 570, 600e/x, 770e, 770x */
8205 rc = fan_get_status_safe(&status);
8206 if (rc < 0)
8207 return rc;
8208
8209 seq_printf(m, "status:\t\t%s\n",
8210 (status != 0) ? "enabled" : "disabled");
8211
8212 rc = fan_get_speed(&speed);
8213 if (rc < 0)
8214 return rc;
8215
8216 seq_printf(m, "speed:\t\t%d\n", speed);
8217
8218 if (status & TP_EC_FAN_FULLSPEED)
8219 /* Disengaged mode takes precedence */
8220 seq_printf(m, "level:\t\tdisengaged\n");
8221 else if (status & TP_EC_FAN_AUTO)
8222 seq_printf(m, "level:\t\tauto\n");
8223 else
8224 seq_printf(m, "level:\t\t%d\n", status);
8225 break;
8226
8227 case TPACPI_FAN_NONE:
8228 default:
8229 seq_printf(m, "status:\t\tnot supported\n");
8230 }
8231
8232 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8233 seq_printf(m, "commands:\tlevel <level>");
8234
8235 switch (fan_control_access_mode) {
8236 case TPACPI_FAN_WR_ACPI_SFAN:
8237 seq_printf(m, " (<level> is 0-7)\n");
8238 break;
8239
8240 default:
8241 seq_printf(m, " (<level> is 0-7, "
8242 "auto, disengaged, full-speed)\n");
8243 break;
8244 }
8245 }
8246
8247 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8248 seq_printf(m, "commands:\tenable, disable\n"
8249 "commands:\twatchdog <timeout> (<timeout> "
8250 "is 0 (off), 1-120 (seconds))\n");
8251
8252 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8253 seq_printf(m, "commands:\tspeed <speed>"
8254 " (<speed> is 0-65535)\n");
8255
8256 return 0;
8257 }
8258
8259 static int fan_write_cmd_level(const char *cmd, int *rc)
8260 {
8261 int level;
8262
8263 if (strlencmp(cmd, "level auto") == 0)
8264 level = TP_EC_FAN_AUTO;
8265 else if ((strlencmp(cmd, "level disengaged") == 0) |
8266 (strlencmp(cmd, "level full-speed") == 0))
8267 level = TP_EC_FAN_FULLSPEED;
8268 else if (sscanf(cmd, "level %d", &level) != 1)
8269 return 0;
8270
8271 *rc = fan_set_level_safe(level);
8272 if (*rc == -ENXIO)
8273 pr_err("level command accepted for unsupported access mode %d\n",
8274 fan_control_access_mode);
8275 else if (!*rc)
8276 tpacpi_disclose_usertask("procfs fan",
8277 "set level to %d\n", level);
8278
8279 return 1;
8280 }
8281
8282 static int fan_write_cmd_enable(const char *cmd, int *rc)
8283 {
8284 if (strlencmp(cmd, "enable") != 0)
8285 return 0;
8286
8287 *rc = fan_set_enable();
8288 if (*rc == -ENXIO)
8289 pr_err("enable command accepted for unsupported access mode %d\n",
8290 fan_control_access_mode);
8291 else if (!*rc)
8292 tpacpi_disclose_usertask("procfs fan", "enable\n");
8293
8294 return 1;
8295 }
8296
8297 static int fan_write_cmd_disable(const char *cmd, int *rc)
8298 {
8299 if (strlencmp(cmd, "disable") != 0)
8300 return 0;
8301
8302 *rc = fan_set_disable();
8303 if (*rc == -ENXIO)
8304 pr_err("disable command accepted for unsupported access mode %d\n",
8305 fan_control_access_mode);
8306 else if (!*rc)
8307 tpacpi_disclose_usertask("procfs fan", "disable\n");
8308
8309 return 1;
8310 }
8311
8312 static int fan_write_cmd_speed(const char *cmd, int *rc)
8313 {
8314 int speed;
8315
8316 /* TODO:
8317 * Support speed <low> <medium> <high> ? */
8318
8319 if (sscanf(cmd, "speed %d", &speed) != 1)
8320 return 0;
8321
8322 *rc = fan_set_speed(speed);
8323 if (*rc == -ENXIO)
8324 pr_err("speed command accepted for unsupported access mode %d\n",
8325 fan_control_access_mode);
8326 else if (!*rc)
8327 tpacpi_disclose_usertask("procfs fan",
8328 "set speed to %d\n", speed);
8329
8330 return 1;
8331 }
8332
8333 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8334 {
8335 int interval;
8336
8337 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8338 return 0;
8339
8340 if (interval < 0 || interval > 120)
8341 *rc = -EINVAL;
8342 else {
8343 fan_watchdog_maxinterval = interval;
8344 tpacpi_disclose_usertask("procfs fan",
8345 "set watchdog timer to %d\n",
8346 interval);
8347 }
8348
8349 return 1;
8350 }
8351
8352 static int fan_write(char *buf)
8353 {
8354 char *cmd;
8355 int rc = 0;
8356
8357 while (!rc && (cmd = next_cmd(&buf))) {
8358 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8359 fan_write_cmd_level(cmd, &rc)) &&
8360 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8361 (fan_write_cmd_enable(cmd, &rc) ||
8362 fan_write_cmd_disable(cmd, &rc) ||
8363 fan_write_cmd_watchdog(cmd, &rc))) &&
8364 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8365 fan_write_cmd_speed(cmd, &rc))
8366 )
8367 rc = -EINVAL;
8368 else if (!rc)
8369 fan_watchdog_reset();
8370 }
8371
8372 return rc;
8373 }
8374
8375 static struct ibm_struct fan_driver_data = {
8376 .name = "fan",
8377 .read = fan_read,
8378 .write = fan_write,
8379 .exit = fan_exit,
8380 .suspend = fan_suspend,
8381 .resume = fan_resume,
8382 };
8383
8384 /****************************************************************************
8385 ****************************************************************************
8386 *
8387 * Infrastructure
8388 *
8389 ****************************************************************************
8390 ****************************************************************************/
8391
8392 /*
8393 * HKEY event callout for other subdrivers go here
8394 * (yes, it is ugly, but it is quick, safe, and gets the job done
8395 */
8396 static void tpacpi_driver_event(const unsigned int hkey_event)
8397 {
8398 if (ibm_backlight_device) {
8399 switch (hkey_event) {
8400 case TP_HKEY_EV_BRGHT_UP:
8401 case TP_HKEY_EV_BRGHT_DOWN:
8402 tpacpi_brightness_notify_change();
8403 }
8404 }
8405 if (alsa_card) {
8406 switch (hkey_event) {
8407 case TP_HKEY_EV_VOL_UP:
8408 case TP_HKEY_EV_VOL_DOWN:
8409 case TP_HKEY_EV_VOL_MUTE:
8410 volume_alsa_notify_change();
8411 }
8412 }
8413 }
8414
8415 static void hotkey_driver_event(const unsigned int scancode)
8416 {
8417 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8418 }
8419
8420 /* sysfs name ---------------------------------------------------------- */
8421 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8422 struct device_attribute *attr,
8423 char *buf)
8424 {
8425 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8426 }
8427
8428 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8429 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8430
8431 /* --------------------------------------------------------------------- */
8432
8433 /* /proc support */
8434 static struct proc_dir_entry *proc_dir;
8435
8436 /*
8437 * Module and infrastructure proble, init and exit handling
8438 */
8439
8440 static bool force_load;
8441
8442 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8443 static const char * __init str_supported(int is_supported)
8444 {
8445 static char text_unsupported[] __initdata = "not supported";
8446
8447 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8448 }
8449 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8450
8451 static void ibm_exit(struct ibm_struct *ibm)
8452 {
8453 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8454
8455 list_del_init(&ibm->all_drivers);
8456
8457 if (ibm->flags.acpi_notify_installed) {
8458 dbg_printk(TPACPI_DBG_EXIT,
8459 "%s: acpi_remove_notify_handler\n", ibm->name);
8460 BUG_ON(!ibm->acpi);
8461 acpi_remove_notify_handler(*ibm->acpi->handle,
8462 ibm->acpi->type,
8463 dispatch_acpi_notify);
8464 ibm->flags.acpi_notify_installed = 0;
8465 }
8466
8467 if (ibm->flags.proc_created) {
8468 dbg_printk(TPACPI_DBG_EXIT,
8469 "%s: remove_proc_entry\n", ibm->name);
8470 remove_proc_entry(ibm->name, proc_dir);
8471 ibm->flags.proc_created = 0;
8472 }
8473
8474 if (ibm->flags.acpi_driver_registered) {
8475 dbg_printk(TPACPI_DBG_EXIT,
8476 "%s: acpi_bus_unregister_driver\n", ibm->name);
8477 BUG_ON(!ibm->acpi);
8478 acpi_bus_unregister_driver(ibm->acpi->driver);
8479 kfree(ibm->acpi->driver);
8480 ibm->acpi->driver = NULL;
8481 ibm->flags.acpi_driver_registered = 0;
8482 }
8483
8484 if (ibm->flags.init_called && ibm->exit) {
8485 ibm->exit();
8486 ibm->flags.init_called = 0;
8487 }
8488
8489 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8490 }
8491
8492 static int __init ibm_init(struct ibm_init_struct *iibm)
8493 {
8494 int ret;
8495 struct ibm_struct *ibm = iibm->data;
8496 struct proc_dir_entry *entry;
8497
8498 BUG_ON(ibm == NULL);
8499
8500 INIT_LIST_HEAD(&ibm->all_drivers);
8501
8502 if (ibm->flags.experimental && !experimental)
8503 return 0;
8504
8505 dbg_printk(TPACPI_DBG_INIT,
8506 "probing for %s\n", ibm->name);
8507
8508 if (iibm->init) {
8509 ret = iibm->init(iibm);
8510 if (ret > 0)
8511 return 0; /* probe failed */
8512 if (ret)
8513 return ret;
8514
8515 ibm->flags.init_called = 1;
8516 }
8517
8518 if (ibm->acpi) {
8519 if (ibm->acpi->hid) {
8520 ret = register_tpacpi_subdriver(ibm);
8521 if (ret)
8522 goto err_out;
8523 }
8524
8525 if (ibm->acpi->notify) {
8526 ret = setup_acpi_notify(ibm);
8527 if (ret == -ENODEV) {
8528 pr_notice("disabling subdriver %s\n",
8529 ibm->name);
8530 ret = 0;
8531 goto err_out;
8532 }
8533 if (ret < 0)
8534 goto err_out;
8535 }
8536 }
8537
8538 dbg_printk(TPACPI_DBG_INIT,
8539 "%s installed\n", ibm->name);
8540
8541 if (ibm->read) {
8542 umode_t mode = iibm->base_procfs_mode;
8543
8544 if (!mode)
8545 mode = S_IRUGO;
8546 if (ibm->write)
8547 mode |= S_IWUSR;
8548 entry = proc_create_data(ibm->name, mode, proc_dir,
8549 &dispatch_proc_fops, ibm);
8550 if (!entry) {
8551 pr_err("unable to create proc entry %s\n", ibm->name);
8552 ret = -ENODEV;
8553 goto err_out;
8554 }
8555 ibm->flags.proc_created = 1;
8556 }
8557
8558 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8559
8560 return 0;
8561
8562 err_out:
8563 dbg_printk(TPACPI_DBG_INIT,
8564 "%s: at error exit path with result %d\n",
8565 ibm->name, ret);
8566
8567 ibm_exit(ibm);
8568 return (ret < 0)? ret : 0;
8569 }
8570
8571 /* Probing */
8572
8573 static bool __pure __init tpacpi_is_fw_digit(const char c)
8574 {
8575 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8576 }
8577
8578 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8579 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8580 const char t)
8581 {
8582 return s && strlen(s) >= 8 &&
8583 tpacpi_is_fw_digit(s[0]) &&
8584 tpacpi_is_fw_digit(s[1]) &&
8585 s[2] == t && s[3] == 'T' &&
8586 tpacpi_is_fw_digit(s[4]) &&
8587 tpacpi_is_fw_digit(s[5]);
8588 }
8589
8590 /* returns 0 - probe ok, or < 0 - probe error.
8591 * Probe ok doesn't mean thinkpad found.
8592 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8593 static int __must_check __init get_thinkpad_model_data(
8594 struct thinkpad_id_data *tp)
8595 {
8596 const struct dmi_device *dev = NULL;
8597 char ec_fw_string[18];
8598 char const *s;
8599
8600 if (!tp)
8601 return -EINVAL;
8602
8603 memset(tp, 0, sizeof(*tp));
8604
8605 if (dmi_name_in_vendors("IBM"))
8606 tp->vendor = PCI_VENDOR_ID_IBM;
8607 else if (dmi_name_in_vendors("LENOVO"))
8608 tp->vendor = PCI_VENDOR_ID_LENOVO;
8609 else
8610 return 0;
8611
8612 s = dmi_get_system_info(DMI_BIOS_VERSION);
8613 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8614 if (s && !tp->bios_version_str)
8615 return -ENOMEM;
8616
8617 /* Really ancient ThinkPad 240X will fail this, which is fine */
8618 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8619 return 0;
8620
8621 tp->bios_model = tp->bios_version_str[0]
8622 | (tp->bios_version_str[1] << 8);
8623 tp->bios_release = (tp->bios_version_str[4] << 8)
8624 | tp->bios_version_str[5];
8625
8626 /*
8627 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8628 * X32 or newer, all Z series; Some models must have an
8629 * up-to-date BIOS or they will not be detected.
8630 *
8631 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8632 */
8633 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8634 if (sscanf(dev->name,
8635 "IBM ThinkPad Embedded Controller -[%17c",
8636 ec_fw_string) == 1) {
8637 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8638 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8639
8640 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8641 if (!tp->ec_version_str)
8642 return -ENOMEM;
8643
8644 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8645 tp->ec_model = ec_fw_string[0]
8646 | (ec_fw_string[1] << 8);
8647 tp->ec_release = (ec_fw_string[4] << 8)
8648 | ec_fw_string[5];
8649 } else {
8650 pr_notice("ThinkPad firmware release %s "
8651 "doesn't match the known patterns\n",
8652 ec_fw_string);
8653 pr_notice("please report this to %s\n",
8654 TPACPI_MAIL);
8655 }
8656 break;
8657 }
8658 }
8659
8660 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8661 if (s && !(strnicmp(s, "ThinkPad", 8) && strnicmp(s, "Lenovo", 6))) {
8662 tp->model_str = kstrdup(s, GFP_KERNEL);
8663 if (!tp->model_str)
8664 return -ENOMEM;
8665 }
8666
8667 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8668 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8669 if (s && !tp->nummodel_str)
8670 return -ENOMEM;
8671
8672 return 0;
8673 }
8674
8675 static int __init probe_for_thinkpad(void)
8676 {
8677 int is_thinkpad;
8678
8679 if (acpi_disabled)
8680 return -ENODEV;
8681
8682 /* It would be dangerous to run the driver in this case */
8683 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
8684 return -ENODEV;
8685
8686 /*
8687 * Non-ancient models have better DMI tagging, but very old models
8688 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8689 */
8690 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8691 (thinkpad_id.ec_model != 0) ||
8692 tpacpi_is_fw_known();
8693
8694 /* The EC handler is required */
8695 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
8696 if (!ec_handle) {
8697 if (is_thinkpad)
8698 pr_err("Not yet supported ThinkPad detected!\n");
8699 return -ENODEV;
8700 }
8701
8702 if (!is_thinkpad && !force_load)
8703 return -ENODEV;
8704
8705 return 0;
8706 }
8707
8708 static void __init thinkpad_acpi_init_banner(void)
8709 {
8710 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
8711 pr_info("%s\n", TPACPI_URL);
8712
8713 pr_info("ThinkPad BIOS %s, EC %s\n",
8714 (thinkpad_id.bios_version_str) ?
8715 thinkpad_id.bios_version_str : "unknown",
8716 (thinkpad_id.ec_version_str) ?
8717 thinkpad_id.ec_version_str : "unknown");
8718
8719 BUG_ON(!thinkpad_id.vendor);
8720
8721 if (thinkpad_id.model_str)
8722 pr_info("%s %s, model %s\n",
8723 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
8724 "IBM" : ((thinkpad_id.vendor ==
8725 PCI_VENDOR_ID_LENOVO) ?
8726 "Lenovo" : "Unknown vendor"),
8727 thinkpad_id.model_str,
8728 (thinkpad_id.nummodel_str) ?
8729 thinkpad_id.nummodel_str : "unknown");
8730 }
8731
8732 /* Module init, exit, parameters */
8733
8734 static struct ibm_init_struct ibms_init[] __initdata = {
8735 {
8736 .data = &thinkpad_acpi_driver_data,
8737 },
8738 {
8739 .init = hotkey_init,
8740 .data = &hotkey_driver_data,
8741 },
8742 {
8743 .init = bluetooth_init,
8744 .data = &bluetooth_driver_data,
8745 },
8746 {
8747 .init = wan_init,
8748 .data = &wan_driver_data,
8749 },
8750 {
8751 .init = uwb_init,
8752 .data = &uwb_driver_data,
8753 },
8754 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8755 {
8756 .init = video_init,
8757 .base_procfs_mode = S_IRUSR,
8758 .data = &video_driver_data,
8759 },
8760 #endif
8761 {
8762 .init = light_init,
8763 .data = &light_driver_data,
8764 },
8765 {
8766 .init = cmos_init,
8767 .data = &cmos_driver_data,
8768 },
8769 {
8770 .init = led_init,
8771 .data = &led_driver_data,
8772 },
8773 {
8774 .init = beep_init,
8775 .data = &beep_driver_data,
8776 },
8777 {
8778 .init = thermal_init,
8779 .data = &thermal_driver_data,
8780 },
8781 {
8782 .init = brightness_init,
8783 .data = &brightness_driver_data,
8784 },
8785 {
8786 .init = volume_init,
8787 .data = &volume_driver_data,
8788 },
8789 {
8790 .init = fan_init,
8791 .data = &fan_driver_data,
8792 },
8793 };
8794
8795 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8796 {
8797 unsigned int i;
8798 struct ibm_struct *ibm;
8799
8800 if (!kp || !kp->name || !val)
8801 return -EINVAL;
8802
8803 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8804 ibm = ibms_init[i].data;
8805 WARN_ON(ibm == NULL);
8806
8807 if (!ibm || !ibm->name)
8808 continue;
8809
8810 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8811 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8812 return -ENOSPC;
8813 strcpy(ibms_init[i].param, val);
8814 strcat(ibms_init[i].param, ",");
8815 return 0;
8816 }
8817 }
8818
8819 return -EINVAL;
8820 }
8821
8822 module_param(experimental, int, 0444);
8823 MODULE_PARM_DESC(experimental,
8824 "Enables experimental features when non-zero");
8825
8826 module_param_named(debug, dbg_level, uint, 0);
8827 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8828
8829 module_param(force_load, bool, 0444);
8830 MODULE_PARM_DESC(force_load,
8831 "Attempts to load the driver even on a "
8832 "mis-identified ThinkPad when true");
8833
8834 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8835 MODULE_PARM_DESC(fan_control,
8836 "Enables setting fan parameters features when true");
8837
8838 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8839 MODULE_PARM_DESC(brightness_mode,
8840 "Selects brightness control strategy: "
8841 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8842
8843 module_param(brightness_enable, uint, 0444);
8844 MODULE_PARM_DESC(brightness_enable,
8845 "Enables backlight control when 1, disables when 0");
8846
8847 module_param(hotkey_report_mode, uint, 0444);
8848 MODULE_PARM_DESC(hotkey_report_mode,
8849 "used for backwards compatibility with userspace, "
8850 "see documentation");
8851
8852 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8853 module_param_named(volume_mode, volume_mode, uint, 0444);
8854 MODULE_PARM_DESC(volume_mode,
8855 "Selects volume control strategy: "
8856 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8857
8858 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8859 MODULE_PARM_DESC(volume_capabilities,
8860 "Selects the mixer capabilites: "
8861 "0=auto, 1=volume and mute, 2=mute only");
8862
8863 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8864 MODULE_PARM_DESC(volume_control,
8865 "Enables software override for the console audio "
8866 "control when true");
8867
8868 /* ALSA module API parameters */
8869 module_param_named(index, alsa_index, int, 0444);
8870 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8871 module_param_named(id, alsa_id, charp, 0444);
8872 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8873 module_param_named(enable, alsa_enable, bool, 0444);
8874 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8875 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8876
8877 #define TPACPI_PARAM(feature) \
8878 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8879 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8880 "at module load, see documentation")
8881
8882 TPACPI_PARAM(hotkey);
8883 TPACPI_PARAM(bluetooth);
8884 TPACPI_PARAM(video);
8885 TPACPI_PARAM(light);
8886 TPACPI_PARAM(cmos);
8887 TPACPI_PARAM(led);
8888 TPACPI_PARAM(beep);
8889 TPACPI_PARAM(brightness);
8890 TPACPI_PARAM(volume);
8891 TPACPI_PARAM(fan);
8892
8893 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8894 module_param(dbg_wlswemul, uint, 0444);
8895 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8896 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8897 MODULE_PARM_DESC(wlsw_state,
8898 "Initial state of the emulated WLSW switch");
8899
8900 module_param(dbg_bluetoothemul, uint, 0444);
8901 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8902 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8903 MODULE_PARM_DESC(bluetooth_state,
8904 "Initial state of the emulated bluetooth switch");
8905
8906 module_param(dbg_wwanemul, uint, 0444);
8907 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8908 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8909 MODULE_PARM_DESC(wwan_state,
8910 "Initial state of the emulated WWAN switch");
8911
8912 module_param(dbg_uwbemul, uint, 0444);
8913 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8914 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8915 MODULE_PARM_DESC(uwb_state,
8916 "Initial state of the emulated UWB switch");
8917 #endif
8918
8919 static void thinkpad_acpi_module_exit(void)
8920 {
8921 struct ibm_struct *ibm, *itmp;
8922
8923 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8924
8925 list_for_each_entry_safe_reverse(ibm, itmp,
8926 &tpacpi_all_drivers,
8927 all_drivers) {
8928 ibm_exit(ibm);
8929 }
8930
8931 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8932
8933 if (tpacpi_inputdev) {
8934 if (tp_features.input_device_registered)
8935 input_unregister_device(tpacpi_inputdev);
8936 else
8937 input_free_device(tpacpi_inputdev);
8938 kfree(hotkey_keycode_map);
8939 }
8940
8941 if (tpacpi_hwmon)
8942 hwmon_device_unregister(tpacpi_hwmon);
8943
8944 if (tp_features.sensors_pdev_attrs_registered)
8945 device_remove_file(&tpacpi_sensors_pdev->dev,
8946 &dev_attr_thinkpad_acpi_pdev_name);
8947 if (tpacpi_sensors_pdev)
8948 platform_device_unregister(tpacpi_sensors_pdev);
8949 if (tpacpi_pdev)
8950 platform_device_unregister(tpacpi_pdev);
8951
8952 if (tp_features.sensors_pdrv_attrs_registered)
8953 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8954 if (tp_features.platform_drv_attrs_registered)
8955 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8956
8957 if (tp_features.sensors_pdrv_registered)
8958 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8959
8960 if (tp_features.platform_drv_registered)
8961 platform_driver_unregister(&tpacpi_pdriver);
8962
8963 if (proc_dir)
8964 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8965
8966 if (tpacpi_wq)
8967 destroy_workqueue(tpacpi_wq);
8968
8969 kfree(thinkpad_id.bios_version_str);
8970 kfree(thinkpad_id.ec_version_str);
8971 kfree(thinkpad_id.model_str);
8972 kfree(thinkpad_id.nummodel_str);
8973 }
8974
8975
8976 static int __init thinkpad_acpi_module_init(void)
8977 {
8978 int ret, i;
8979
8980 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8981
8982 /* Parameter checking */
8983 if (hotkey_report_mode > 2)
8984 return -EINVAL;
8985
8986 /* Driver-level probe */
8987
8988 ret = get_thinkpad_model_data(&thinkpad_id);
8989 if (ret) {
8990 pr_err("unable to get DMI data: %d\n", ret);
8991 thinkpad_acpi_module_exit();
8992 return ret;
8993 }
8994 ret = probe_for_thinkpad();
8995 if (ret) {
8996 thinkpad_acpi_module_exit();
8997 return ret;
8998 }
8999
9000 /* Driver initialization */
9001
9002 thinkpad_acpi_init_banner();
9003 tpacpi_check_outdated_fw();
9004
9005 TPACPI_ACPIHANDLE_INIT(ecrd);
9006 TPACPI_ACPIHANDLE_INIT(ecwr);
9007
9008 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
9009 if (!tpacpi_wq) {
9010 thinkpad_acpi_module_exit();
9011 return -ENOMEM;
9012 }
9013
9014 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
9015 if (!proc_dir) {
9016 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
9017 thinkpad_acpi_module_exit();
9018 return -ENODEV;
9019 }
9020
9021 ret = platform_driver_register(&tpacpi_pdriver);
9022 if (ret) {
9023 pr_err("unable to register main platform driver\n");
9024 thinkpad_acpi_module_exit();
9025 return ret;
9026 }
9027 tp_features.platform_drv_registered = 1;
9028
9029 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9030 if (ret) {
9031 pr_err("unable to register hwmon platform driver\n");
9032 thinkpad_acpi_module_exit();
9033 return ret;
9034 }
9035 tp_features.sensors_pdrv_registered = 1;
9036
9037 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9038 if (!ret) {
9039 tp_features.platform_drv_attrs_registered = 1;
9040 ret = tpacpi_create_driver_attributes(
9041 &tpacpi_hwmon_pdriver.driver);
9042 }
9043 if (ret) {
9044 pr_err("unable to create sysfs driver attributes\n");
9045 thinkpad_acpi_module_exit();
9046 return ret;
9047 }
9048 tp_features.sensors_pdrv_attrs_registered = 1;
9049
9050
9051 /* Device initialization */
9052 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9053 NULL, 0);
9054 if (IS_ERR(tpacpi_pdev)) {
9055 ret = PTR_ERR(tpacpi_pdev);
9056 tpacpi_pdev = NULL;
9057 pr_err("unable to register platform device\n");
9058 thinkpad_acpi_module_exit();
9059 return ret;
9060 }
9061 tpacpi_sensors_pdev = platform_device_register_simple(
9062 TPACPI_HWMON_DRVR_NAME,
9063 -1, NULL, 0);
9064 if (IS_ERR(tpacpi_sensors_pdev)) {
9065 ret = PTR_ERR(tpacpi_sensors_pdev);
9066 tpacpi_sensors_pdev = NULL;
9067 pr_err("unable to register hwmon platform device\n");
9068 thinkpad_acpi_module_exit();
9069 return ret;
9070 }
9071 ret = device_create_file(&tpacpi_sensors_pdev->dev,
9072 &dev_attr_thinkpad_acpi_pdev_name);
9073 if (ret) {
9074 pr_err("unable to create sysfs hwmon device attributes\n");
9075 thinkpad_acpi_module_exit();
9076 return ret;
9077 }
9078 tp_features.sensors_pdev_attrs_registered = 1;
9079 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9080 if (IS_ERR(tpacpi_hwmon)) {
9081 ret = PTR_ERR(tpacpi_hwmon);
9082 tpacpi_hwmon = NULL;
9083 pr_err("unable to register hwmon device\n");
9084 thinkpad_acpi_module_exit();
9085 return ret;
9086 }
9087 mutex_init(&tpacpi_inputdev_send_mutex);
9088 tpacpi_inputdev = input_allocate_device();
9089 if (!tpacpi_inputdev) {
9090 pr_err("unable to allocate input device\n");
9091 thinkpad_acpi_module_exit();
9092 return -ENOMEM;
9093 } else {
9094 /* Prepare input device, but don't register */
9095 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9096 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9097 tpacpi_inputdev->id.bustype = BUS_HOST;
9098 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9099 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9100 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9101 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9102 }
9103
9104 /* Init subdriver dependencies */
9105 tpacpi_detect_brightness_capabilities();
9106
9107 /* Init subdrivers */
9108 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9109 ret = ibm_init(&ibms_init[i]);
9110 if (ret >= 0 && *ibms_init[i].param)
9111 ret = ibms_init[i].data->write(ibms_init[i].param);
9112 if (ret < 0) {
9113 thinkpad_acpi_module_exit();
9114 return ret;
9115 }
9116 }
9117
9118 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9119
9120 ret = input_register_device(tpacpi_inputdev);
9121 if (ret < 0) {
9122 pr_err("unable to register input device\n");
9123 thinkpad_acpi_module_exit();
9124 return ret;
9125 } else {
9126 tp_features.input_device_registered = 1;
9127 }
9128
9129 return 0;
9130 }
9131
9132 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9133
9134 /*
9135 * This will autoload the driver in almost every ThinkPad
9136 * in widespread use.
9137 *
9138 * Only _VERY_ old models, like the 240, 240x and 570 lack
9139 * the HKEY event interface.
9140 */
9141 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9142
9143 /*
9144 * DMI matching for module autoloading
9145 *
9146 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9147 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9148 *
9149 * Only models listed in thinkwiki will be supported, so add yours
9150 * if it is not there yet.
9151 */
9152 #define IBM_BIOS_MODULE_ALIAS(__type) \
9153 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9154
9155 /* Ancient thinkpad BIOSes have to be identified by
9156 * BIOS type or model number, and there are far less
9157 * BIOS types than model numbers... */
9158 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
9159
9160 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9161 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9162 MODULE_DESCRIPTION(TPACPI_DESC);
9163 MODULE_VERSION(TPACPI_VERSION);
9164 MODULE_LICENSE("GPL");
9165
9166 module_init(thinkpad_acpi_module_init);
9167 module_exit(thinkpad_acpi_module_exit);
Linux kernel - Deliverables
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