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thinkpad-acpi: disable volume control
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blob20ebad10162d46636e125092c4eb425b801e13b6
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 TPACPI_VERSION "0.23"
25 #define TPACPI_SYSFS_VERSION 0x020700
26
27 /*
28 * Changelog:
29 * 2007-10-20 changelog trimmed down
30 *
31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
32 * drivers/misc.
33 *
34 * 2006-11-22 0.13 new maintainer
35 * changelog now lives in git commit history, and will
36 * not be updated further in-file.
37 *
38 * 2005-03-17 0.11 support for 600e, 770x
39 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
40 *
41 * 2005-01-16 0.9 use MODULE_VERSION
42 * thanks to Henrik Brix Andersen <brix@gentoo.org>
43 * fix parameter passing on module loading
44 * thanks to Rusty Russell <rusty@rustcorp.com.au>
45 * thanks to Jim Radford <radford@blackbean.org>
46 * 2004-11-08 0.8 fix init error case, don't return from a macro
47 * thanks to Chris Wright <chrisw@osdl.org>
48 */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/sched.h>
58 #include <linux/kthread.h>
59 #include <linux/freezer.h>
60 #include <linux/delay.h>
61
62 #include <linux/nvram.h>
63 #include <linux/proc_fs.h>
64 #include <linux/sysfs.h>
65 #include <linux/backlight.h>
66 #include <linux/fb.h>
67 #include <linux/platform_device.h>
68 #include <linux/hwmon.h>
69 #include <linux/hwmon-sysfs.h>
70 #include <linux/input.h>
71 #include <linux/leds.h>
72 #include <linux/rfkill.h>
73 #include <asm/uaccess.h>
74
75 #include <linux/dmi.h>
76 #include <linux/jiffies.h>
77 #include <linux/workqueue.h>
78
79 #include <acpi/acpi_drivers.h>
80
81 #include <linux/pci_ids.h>
82
83
84 /* ThinkPad CMOS commands */
85 #define TP_CMOS_VOLUME_DOWN 0
86 #define TP_CMOS_VOLUME_UP 1
87 #define TP_CMOS_VOLUME_MUTE 2
88 #define TP_CMOS_BRIGHTNESS_UP 4
89 #define TP_CMOS_BRIGHTNESS_DOWN 5
90 #define TP_CMOS_THINKLIGHT_ON 12
91 #define TP_CMOS_THINKLIGHT_OFF 13
92
93 /* NVRAM Addresses */
94 enum tp_nvram_addr {
95 TP_NVRAM_ADDR_HK2 = 0x57,
96 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
97 TP_NVRAM_ADDR_VIDEO = 0x59,
98 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
99 TP_NVRAM_ADDR_MIXER = 0x60,
100 };
101
102 /* NVRAM bit masks */
103 enum {
104 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
105 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
106 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
107 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
108 TP_NVRAM_MASK_THINKLIGHT = 0x10,
109 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
110 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
111 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
112 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
113 TP_NVRAM_MASK_MUTE = 0x40,
114 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
115 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
116 TP_NVRAM_POS_LEVEL_VOLUME = 0,
117 };
118
119 /* ACPI HIDs */
120 #define TPACPI_ACPI_HKEY_HID "IBM0068"
121
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION 0x4101
125
126 /* ACPI \WGSV commands */
127 enum {
128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
132 };
133
134 /* TP_ACPI_WGSV_GET_STATE bits */
135 enum {
136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
146 };
147
148 /* HKEY events */
149 enum tpacpi_hkey_event_t {
150 /* Hotkey-related */
151 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
152 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
153 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
154 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
155 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
156 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
157
158 /* Reasons for waking up from S3/S4 */
159 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */
160 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */
161 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */
162 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */
163 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */
164 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */
165
166 /* Auto-sleep after eject request */
167 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */
168 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */
169
170 /* Misc bay events */
171 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
172
173 /* User-interface events */
174 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
175 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */
176 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */
177 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */
178 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */
179 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */
180 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */
181
182 /* Thermal events */
183 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */
184 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */
185 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */
186 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */
187 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */
188
189 /* Misc */
190 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
191 };
192
193 /****************************************************************************
194 * Main driver
195 */
196
197 #define TPACPI_NAME "thinkpad"
198 #define TPACPI_DESC "ThinkPad ACPI Extras"
199 #define TPACPI_FILE TPACPI_NAME "_acpi"
200 #define TPACPI_URL "http://ibm-acpi.sf.net/"
201 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
202
203 #define TPACPI_PROC_DIR "ibm"
204 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
205 #define TPACPI_DRVR_NAME TPACPI_FILE
206 #define TPACPI_DRVR_SHORTNAME "tpacpi"
207 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
208
209 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
210 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
211
212 #define TPACPI_MAX_ACPI_ARGS 3
213
214 /* rfkill switches */
215 enum {
216 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
217 TPACPI_RFK_WWAN_SW_ID,
218 TPACPI_RFK_UWB_SW_ID,
219 };
220
221 /* printk headers */
222 #define TPACPI_LOG TPACPI_FILE ": "
223 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
224 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
225 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
226 #define TPACPI_ERR KERN_ERR TPACPI_LOG
227 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
228 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
229 #define TPACPI_INFO KERN_INFO TPACPI_LOG
230 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
231
232 /* Debugging printk groups */
233 #define TPACPI_DBG_ALL 0xffff
234 #define TPACPI_DBG_DISCLOSETASK 0x8000
235 #define TPACPI_DBG_INIT 0x0001
236 #define TPACPI_DBG_EXIT 0x0002
237 #define TPACPI_DBG_RFKILL 0x0004
238 #define TPACPI_DBG_HKEY 0x0008
239 #define TPACPI_DBG_FAN 0x0010
240 #define TPACPI_DBG_BRGHT 0x0020
241 #define TPACPI_DBG_MIXER 0x0040
242
243 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
244 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
245 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
246
247
248 /****************************************************************************
249 * Driver-wide structs and misc. variables
250 */
251
252 struct ibm_struct;
253
254 struct tp_acpi_drv_struct {
255 const struct acpi_device_id *hid;
256 struct acpi_driver *driver;
257
258 void (*notify) (struct ibm_struct *, u32);
259 acpi_handle *handle;
260 u32 type;
261 struct acpi_device *device;
262 };
263
264 struct ibm_struct {
265 char *name;
266
267 int (*read) (char *);
268 int (*write) (char *);
269 void (*exit) (void);
270 void (*resume) (void);
271 void (*suspend) (pm_message_t state);
272 void (*shutdown) (void);
273
274 struct list_head all_drivers;
275
276 struct tp_acpi_drv_struct *acpi;
277
278 struct {
279 u8 acpi_driver_registered:1;
280 u8 acpi_notify_installed:1;
281 u8 proc_created:1;
282 u8 init_called:1;
283 u8 experimental:1;
284 } flags;
285 };
286
287 struct ibm_init_struct {
288 char param[32];
289
290 int (*init) (struct ibm_init_struct *);
291 struct ibm_struct *data;
292 };
293
294 static struct {
295 u32 bluetooth:1;
296 u32 hotkey:1;
297 u32 hotkey_mask:1;
298 u32 hotkey_wlsw:1;
299 u32 hotkey_tablet:1;
300 u32 light:1;
301 u32 light_status:1;
302 u32 bright_16levels:1;
303 u32 bright_acpimode:1;
304 u32 wan:1;
305 u32 uwb:1;
306 u32 fan_ctrl_status_undef:1;
307 u32 second_fan:1;
308 u32 beep_needs_two_args:1;
309 u32 mixer_no_level_control:1;
310 u32 input_device_registered:1;
311 u32 platform_drv_registered:1;
312 u32 platform_drv_attrs_registered:1;
313 u32 sensors_pdrv_registered:1;
314 u32 sensors_pdrv_attrs_registered:1;
315 u32 sensors_pdev_attrs_registered:1;
316 u32 hotkey_poll_active:1;
317 } tp_features;
318
319 static struct {
320 u16 hotkey_mask_ff:1;
321 u16 volume_ctrl_forbidden:1;
322 } tp_warned;
323
324 struct thinkpad_id_data {
325 unsigned int vendor; /* ThinkPad vendor:
326 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
327
328 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
329 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
330
331 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
332 u16 ec_model;
333 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
334 u16 ec_release;
335
336 char *model_str; /* ThinkPad T43 */
337 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
338 };
339 static struct thinkpad_id_data thinkpad_id;
340
341 static enum {
342 TPACPI_LIFE_INIT = 0,
343 TPACPI_LIFE_RUNNING,
344 TPACPI_LIFE_EXITING,
345 } tpacpi_lifecycle;
346
347 static int experimental;
348 static u32 dbg_level;
349
350 static struct workqueue_struct *tpacpi_wq;
351
352 enum led_status_t {
353 TPACPI_LED_OFF = 0,
354 TPACPI_LED_ON,
355 TPACPI_LED_BLINK,
356 };
357
358 /* Special LED class that can defer work */
359 struct tpacpi_led_classdev {
360 struct led_classdev led_classdev;
361 struct work_struct work;
362 enum led_status_t new_state;
363 unsigned int led;
364 };
365
366 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
367 static int dbg_wlswemul;
368 static int tpacpi_wlsw_emulstate;
369 static int dbg_bluetoothemul;
370 static int tpacpi_bluetooth_emulstate;
371 static int dbg_wwanemul;
372 static int tpacpi_wwan_emulstate;
373 static int dbg_uwbemul;
374 static int tpacpi_uwb_emulstate;
375 #endif
376
377
378 /*************************************************************************
379 * Debugging helpers
380 */
381
382 #define dbg_printk(a_dbg_level, format, arg...) \
383 do { if (dbg_level & (a_dbg_level)) \
384 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
385 } while (0)
386
387 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
388 #define vdbg_printk dbg_printk
389 static const char *str_supported(int is_supported);
390 #else
391 #define vdbg_printk(a_dbg_level, format, arg...) \
392 do { } while (0)
393 #endif
394
395 static void tpacpi_log_usertask(const char * const what)
396 {
397 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
398 what, task_tgid_vnr(current));
399 }
400
401 #define tpacpi_disclose_usertask(what, format, arg...) \
402 do { \
403 if (unlikely( \
404 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
405 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
406 printk(TPACPI_DEBUG "%s: PID %d: " format, \
407 what, task_tgid_vnr(current), ## arg); \
408 } \
409 } while (0)
410
411 /*
412 * Quirk handling helpers
413 *
414 * ThinkPad IDs and versions seen in the field so far
415 * are two-characters from the set [0-9A-Z], i.e. base 36.
416 *
417 * We use values well outside that range as specials.
418 */
419
420 #define TPACPI_MATCH_ANY 0xffffU
421 #define TPACPI_MATCH_UNKNOWN 0U
422
423 /* TPID('1', 'Y') == 0x5931 */
424 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
425
426 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
427 { .vendor = PCI_VENDOR_ID_IBM, \
428 .bios = TPID(__id1, __id2), \
429 .ec = TPACPI_MATCH_ANY, \
430 .quirks = (__quirk) }
431
432 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
433 { .vendor = PCI_VENDOR_ID_LENOVO, \
434 .bios = TPID(__id1, __id2), \
435 .ec = TPACPI_MATCH_ANY, \
436 .quirks = (__quirk) }
437
438 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \
439 { .vendor = PCI_VENDOR_ID_LENOVO, \
440 .bios = TPACPI_MATCH_ANY, \
441 .ec = TPID(__id1, __id2), \
442 .quirks = (__quirk) }
443
444 struct tpacpi_quirk {
445 unsigned int vendor;
446 u16 bios;
447 u16 ec;
448 unsigned long quirks;
449 };
450
451 /**
452 * tpacpi_check_quirks() - search BIOS/EC version on a list
453 * @qlist: array of &struct tpacpi_quirk
454 * @qlist_size: number of elements in @qlist
455 *
456 * Iterates over a quirks list until one is found that matches the
457 * ThinkPad's vendor, BIOS and EC model.
458 *
459 * Returns 0 if nothing matches, otherwise returns the quirks field of
460 * the matching &struct tpacpi_quirk entry.
461 *
462 * The match criteria is: vendor, ec and bios much match.
463 */
464 static unsigned long __init tpacpi_check_quirks(
465 const struct tpacpi_quirk *qlist,
466 unsigned int qlist_size)
467 {
468 while (qlist_size) {
469 if ((qlist->vendor == thinkpad_id.vendor ||
470 qlist->vendor == TPACPI_MATCH_ANY) &&
471 (qlist->bios == thinkpad_id.bios_model ||
472 qlist->bios == TPACPI_MATCH_ANY) &&
473 (qlist->ec == thinkpad_id.ec_model ||
474 qlist->ec == TPACPI_MATCH_ANY))
475 return qlist->quirks;
476
477 qlist_size--;
478 qlist++;
479 }
480 return 0;
481 }
482
483
484 /****************************************************************************
485 ****************************************************************************
486 *
487 * ACPI Helpers and device model
488 *
489 ****************************************************************************
490 ****************************************************************************/
491
492 /*************************************************************************
493 * ACPI basic handles
494 */
495
496 static acpi_handle root_handle;
497
498 #define TPACPI_HANDLE(object, parent, paths...) \
499 static acpi_handle object##_handle; \
500 static acpi_handle *object##_parent = &parent##_handle; \
501 static char *object##_path; \
502 static char *object##_paths[] = { paths }
503
504 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
505 "\\_SB.PCI.ISA.EC", /* 570 */
506 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
507 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
508 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
509 "\\_SB.PCI0.ICH3.EC0", /* R31 */
510 "\\_SB.PCI0.LPC.EC", /* all others */
511 );
512
513 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
514 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
515
516 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
517 /* T4x, X31, X40 */
518 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
519 "\\CMS", /* R40, R40e */
520 ); /* all others */
521
522 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
523 "^HKEY", /* R30, R31 */
524 "HKEY", /* all others */
525 ); /* 570 */
526
527 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
528 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
529 "\\_SB.PCI0.VID0", /* 770e */
530 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
531 "\\_SB.PCI0.AGP.VID", /* all others */
532 ); /* R30, R31 */
533
534
535 /*************************************************************************
536 * ACPI helpers
537 */
538
539 static int acpi_evalf(acpi_handle handle,
540 void *res, char *method, char *fmt, ...)
541 {
542 char *fmt0 = fmt;
543 struct acpi_object_list params;
544 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
545 struct acpi_buffer result, *resultp;
546 union acpi_object out_obj;
547 acpi_status status;
548 va_list ap;
549 char res_type;
550 int success;
551 int quiet;
552
553 if (!*fmt) {
554 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
555 return 0;
556 }
557
558 if (*fmt == 'q') {
559 quiet = 1;
560 fmt++;
561 } else
562 quiet = 0;
563
564 res_type = *(fmt++);
565
566 params.count = 0;
567 params.pointer = &in_objs[0];
568
569 va_start(ap, fmt);
570 while (*fmt) {
571 char c = *(fmt++);
572 switch (c) {
573 case 'd': /* int */
574 in_objs[params.count].integer.value = va_arg(ap, int);
575 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
576 break;
577 /* add more types as needed */
578 default:
579 printk(TPACPI_ERR "acpi_evalf() called "
580 "with invalid format character '%c'\n", c);
581 return 0;
582 }
583 }
584 va_end(ap);
585
586 if (res_type != 'v') {
587 result.length = sizeof(out_obj);
588 result.pointer = &out_obj;
589 resultp = &result;
590 } else
591 resultp = NULL;
592
593 status = acpi_evaluate_object(handle, method, &params, resultp);
594
595 switch (res_type) {
596 case 'd': /* int */
597 if (res)
598 *(int *)res = out_obj.integer.value;
599 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
600 break;
601 case 'v': /* void */
602 success = status == AE_OK;
603 break;
604 /* add more types as needed */
605 default:
606 printk(TPACPI_ERR "acpi_evalf() called "
607 "with invalid format character '%c'\n", res_type);
608 return 0;
609 }
610
611 if (!success && !quiet)
612 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
613 method, fmt0, status);
614
615 return success;
616 }
617
618 static int acpi_ec_read(int i, u8 *p)
619 {
620 int v;
621
622 if (ecrd_handle) {
623 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
624 return 0;
625 *p = v;
626 } else {
627 if (ec_read(i, p) < 0)
628 return 0;
629 }
630
631 return 1;
632 }
633
634 static int acpi_ec_write(int i, u8 v)
635 {
636 if (ecwr_handle) {
637 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
638 return 0;
639 } else {
640 if (ec_write(i, v) < 0)
641 return 0;
642 }
643
644 return 1;
645 }
646
647 static int issue_thinkpad_cmos_command(int cmos_cmd)
648 {
649 if (!cmos_handle)
650 return -ENXIO;
651
652 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
653 return -EIO;
654
655 return 0;
656 }
657
658 /*************************************************************************
659 * ACPI device model
660 */
661
662 #define TPACPI_ACPIHANDLE_INIT(object) \
663 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
664 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
665
666 static void drv_acpi_handle_init(char *name,
667 acpi_handle *handle, acpi_handle parent,
668 char **paths, int num_paths, char **path)
669 {
670 int i;
671 acpi_status status;
672
673 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
674 name);
675
676 for (i = 0; i < num_paths; i++) {
677 status = acpi_get_handle(parent, paths[i], handle);
678 if (ACPI_SUCCESS(status)) {
679 *path = paths[i];
680 dbg_printk(TPACPI_DBG_INIT,
681 "Found ACPI handle %s for %s\n",
682 *path, name);
683 return;
684 }
685 }
686
687 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
688 name);
689 *handle = NULL;
690 }
691
692 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
693 {
694 struct ibm_struct *ibm = data;
695
696 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
697 return;
698
699 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
700 return;
701
702 ibm->acpi->notify(ibm, event);
703 }
704
705 static int __init setup_acpi_notify(struct ibm_struct *ibm)
706 {
707 acpi_status status;
708 int rc;
709
710 BUG_ON(!ibm->acpi);
711
712 if (!*ibm->acpi->handle)
713 return 0;
714
715 vdbg_printk(TPACPI_DBG_INIT,
716 "setting up ACPI notify for %s\n", ibm->name);
717
718 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
719 if (rc < 0) {
720 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
721 ibm->name, rc);
722 return -ENODEV;
723 }
724
725 ibm->acpi->device->driver_data = ibm;
726 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
727 TPACPI_ACPI_EVENT_PREFIX,
728 ibm->name);
729
730 status = acpi_install_notify_handler(*ibm->acpi->handle,
731 ibm->acpi->type, dispatch_acpi_notify, ibm);
732 if (ACPI_FAILURE(status)) {
733 if (status == AE_ALREADY_EXISTS) {
734 printk(TPACPI_NOTICE
735 "another device driver is already "
736 "handling %s events\n", ibm->name);
737 } else {
738 printk(TPACPI_ERR
739 "acpi_install_notify_handler(%s) failed: %d\n",
740 ibm->name, status);
741 }
742 return -ENODEV;
743 }
744 ibm->flags.acpi_notify_installed = 1;
745 return 0;
746 }
747
748 static int __init tpacpi_device_add(struct acpi_device *device)
749 {
750 return 0;
751 }
752
753 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
754 {
755 int rc;
756
757 dbg_printk(TPACPI_DBG_INIT,
758 "registering %s as an ACPI driver\n", ibm->name);
759
760 BUG_ON(!ibm->acpi);
761
762 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
763 if (!ibm->acpi->driver) {
764 printk(TPACPI_ERR
765 "failed to allocate memory for ibm->acpi->driver\n");
766 return -ENOMEM;
767 }
768
769 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
770 ibm->acpi->driver->ids = ibm->acpi->hid;
771
772 ibm->acpi->driver->ops.add = &tpacpi_device_add;
773
774 rc = acpi_bus_register_driver(ibm->acpi->driver);
775 if (rc < 0) {
776 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
777 ibm->name, rc);
778 kfree(ibm->acpi->driver);
779 ibm->acpi->driver = NULL;
780 } else if (!rc)
781 ibm->flags.acpi_driver_registered = 1;
782
783 return rc;
784 }
785
786
787 /****************************************************************************
788 ****************************************************************************
789 *
790 * Procfs Helpers
791 *
792 ****************************************************************************
793 ****************************************************************************/
794
795 static int dispatch_procfs_read(char *page, char **start, off_t off,
796 int count, int *eof, void *data)
797 {
798 struct ibm_struct *ibm = data;
799 int len;
800
801 if (!ibm || !ibm->read)
802 return -EINVAL;
803
804 len = ibm->read(page);
805 if (len < 0)
806 return len;
807
808 if (len <= off + count)
809 *eof = 1;
810 *start = page + off;
811 len -= off;
812 if (len > count)
813 len = count;
814 if (len < 0)
815 len = 0;
816
817 return len;
818 }
819
820 static int dispatch_procfs_write(struct file *file,
821 const char __user *userbuf,
822 unsigned long count, void *data)
823 {
824 struct ibm_struct *ibm = data;
825 char *kernbuf;
826 int ret;
827
828 if (!ibm || !ibm->write)
829 return -EINVAL;
830 if (count > PAGE_SIZE - 2)
831 return -EINVAL;
832
833 kernbuf = kmalloc(count + 2, GFP_KERNEL);
834 if (!kernbuf)
835 return -ENOMEM;
836
837 if (copy_from_user(kernbuf, userbuf, count)) {
838 kfree(kernbuf);
839 return -EFAULT;
840 }
841
842 kernbuf[count] = 0;
843 strcat(kernbuf, ",");
844 ret = ibm->write(kernbuf);
845 if (ret == 0)
846 ret = count;
847
848 kfree(kernbuf);
849
850 return ret;
851 }
852
853 static char *next_cmd(char **cmds)
854 {
855 char *start = *cmds;
856 char *end;
857
858 while ((end = strchr(start, ',')) && end == start)
859 start = end + 1;
860
861 if (!end)
862 return NULL;
863
864 *end = 0;
865 *cmds = end + 1;
866 return start;
867 }
868
869
870 /****************************************************************************
871 ****************************************************************************
872 *
873 * Device model: input, hwmon and platform
874 *
875 ****************************************************************************
876 ****************************************************************************/
877
878 static struct platform_device *tpacpi_pdev;
879 static struct platform_device *tpacpi_sensors_pdev;
880 static struct device *tpacpi_hwmon;
881 static struct input_dev *tpacpi_inputdev;
882 static struct mutex tpacpi_inputdev_send_mutex;
883 static LIST_HEAD(tpacpi_all_drivers);
884
885 static int tpacpi_suspend_handler(struct platform_device *pdev,
886 pm_message_t state)
887 {
888 struct ibm_struct *ibm, *itmp;
889
890 list_for_each_entry_safe(ibm, itmp,
891 &tpacpi_all_drivers,
892 all_drivers) {
893 if (ibm->suspend)
894 (ibm->suspend)(state);
895 }
896
897 return 0;
898 }
899
900 static int tpacpi_resume_handler(struct platform_device *pdev)
901 {
902 struct ibm_struct *ibm, *itmp;
903
904 list_for_each_entry_safe(ibm, itmp,
905 &tpacpi_all_drivers,
906 all_drivers) {
907 if (ibm->resume)
908 (ibm->resume)();
909 }
910
911 return 0;
912 }
913
914 static void tpacpi_shutdown_handler(struct platform_device *pdev)
915 {
916 struct ibm_struct *ibm, *itmp;
917
918 list_for_each_entry_safe(ibm, itmp,
919 &tpacpi_all_drivers,
920 all_drivers) {
921 if (ibm->shutdown)
922 (ibm->shutdown)();
923 }
924 }
925
926 static struct platform_driver tpacpi_pdriver = {
927 .driver = {
928 .name = TPACPI_DRVR_NAME,
929 .owner = THIS_MODULE,
930 },
931 .suspend = tpacpi_suspend_handler,
932 .resume = tpacpi_resume_handler,
933 .shutdown = tpacpi_shutdown_handler,
934 };
935
936 static struct platform_driver tpacpi_hwmon_pdriver = {
937 .driver = {
938 .name = TPACPI_HWMON_DRVR_NAME,
939 .owner = THIS_MODULE,
940 },
941 };
942
943 /*************************************************************************
944 * sysfs support helpers
945 */
946
947 struct attribute_set {
948 unsigned int members, max_members;
949 struct attribute_group group;
950 };
951
952 struct attribute_set_obj {
953 struct attribute_set s;
954 struct attribute *a;
955 } __attribute__((packed));
956
957 static struct attribute_set *create_attr_set(unsigned int max_members,
958 const char *name)
959 {
960 struct attribute_set_obj *sobj;
961
962 if (max_members == 0)
963 return NULL;
964
965 /* Allocates space for implicit NULL at the end too */
966 sobj = kzalloc(sizeof(struct attribute_set_obj) +
967 max_members * sizeof(struct attribute *),
968 GFP_KERNEL);
969 if (!sobj)
970 return NULL;
971 sobj->s.max_members = max_members;
972 sobj->s.group.attrs = &sobj->a;
973 sobj->s.group.name = name;
974
975 return &sobj->s;
976 }
977
978 #define destroy_attr_set(_set) \
979 kfree(_set);
980
981 /* not multi-threaded safe, use it in a single thread per set */
982 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
983 {
984 if (!s || !attr)
985 return -EINVAL;
986
987 if (s->members >= s->max_members)
988 return -ENOMEM;
989
990 s->group.attrs[s->members] = attr;
991 s->members++;
992
993 return 0;
994 }
995
996 static int add_many_to_attr_set(struct attribute_set *s,
997 struct attribute **attr,
998 unsigned int count)
999 {
1000 int i, res;
1001
1002 for (i = 0; i < count; i++) {
1003 res = add_to_attr_set(s, attr[i]);
1004 if (res)
1005 return res;
1006 }
1007
1008 return 0;
1009 }
1010
1011 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1012 {
1013 sysfs_remove_group(kobj, &s->group);
1014 destroy_attr_set(s);
1015 }
1016
1017 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1018 sysfs_create_group(_kobj, &_attr_set->group)
1019
1020 static int parse_strtoul(const char *buf,
1021 unsigned long max, unsigned long *value)
1022 {
1023 char *endp;
1024
1025 while (*buf && isspace(*buf))
1026 buf++;
1027 *value = simple_strtoul(buf, &endp, 0);
1028 while (*endp && isspace(*endp))
1029 endp++;
1030 if (*endp || *value > max)
1031 return -EINVAL;
1032
1033 return 0;
1034 }
1035
1036 static void tpacpi_disable_brightness_delay(void)
1037 {
1038 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1039 printk(TPACPI_NOTICE
1040 "ACPI backlight control delay disabled\n");
1041 }
1042
1043 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1044 {
1045 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1046 union acpi_object *obj;
1047 int rc;
1048
1049 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1050 obj = (union acpi_object *)buffer.pointer;
1051 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1052 printk(TPACPI_ERR "Unknown _BCL data, "
1053 "please report this to %s\n", TPACPI_MAIL);
1054 rc = 0;
1055 } else {
1056 rc = obj->package.count;
1057 }
1058 } else {
1059 return 0;
1060 }
1061
1062 kfree(buffer.pointer);
1063 return rc;
1064 }
1065
1066 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1067 u32 lvl, void *context, void **rv)
1068 {
1069 char name[ACPI_PATH_SEGMENT_LENGTH];
1070 struct acpi_buffer buffer = { sizeof(name), &name };
1071
1072 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1073 !strncmp("_BCL", name, sizeof(name) - 1)) {
1074 BUG_ON(!rv || !*rv);
1075 **(int **)rv = tpacpi_query_bcl_levels(handle);
1076 return AE_CTRL_TERMINATE;
1077 } else {
1078 return AE_OK;
1079 }
1080 }
1081
1082 /*
1083 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1084 */
1085 static int __init tpacpi_check_std_acpi_brightness_support(void)
1086 {
1087 int status;
1088 int bcl_levels = 0;
1089 void *bcl_ptr = &bcl_levels;
1090
1091 if (!vid_handle) {
1092 TPACPI_ACPIHANDLE_INIT(vid);
1093 }
1094 if (!vid_handle)
1095 return 0;
1096
1097 /*
1098 * Search for a _BCL method, and execute it. This is safe on all
1099 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1100 * BIOS in ACPI backlight control mode. We do NOT have to care
1101 * about calling the _BCL method in an enabled video device, any
1102 * will do for our purposes.
1103 */
1104
1105 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1106 tpacpi_acpi_walk_find_bcl, NULL,
1107 &bcl_ptr);
1108
1109 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1110 tp_features.bright_acpimode = 1;
1111 return (bcl_levels - 2);
1112 }
1113
1114 return 0;
1115 }
1116
1117 static int __init tpacpi_new_rfkill(const unsigned int id,
1118 struct rfkill **rfk,
1119 const enum rfkill_type rfktype,
1120 const char *name,
1121 const bool set_default,
1122 int (*toggle_radio)(void *, enum rfkill_state),
1123 int (*get_state)(void *, enum rfkill_state *))
1124 {
1125 int res;
1126 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
1127
1128 res = get_state(NULL, &initial_state);
1129 if (res < 0) {
1130 printk(TPACPI_ERR
1131 "failed to read initial state for %s, error %d; "
1132 "will turn radio off\n", name, res);
1133 } else if (set_default) {
1134 /* try to set the initial state as the default for the rfkill
1135 * type, since we ask the firmware to preserve it across S5 in
1136 * NVRAM */
1137 if (rfkill_set_default(rfktype,
1138 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1139 RFKILL_STATE_UNBLOCKED :
1140 RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
1141 vdbg_printk(TPACPI_DBG_RFKILL,
1142 "Default state for %s cannot be changed\n",
1143 name);
1144 }
1145
1146 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1147 if (!*rfk) {
1148 printk(TPACPI_ERR
1149 "failed to allocate memory for rfkill class\n");
1150 return -ENOMEM;
1151 }
1152
1153 (*rfk)->name = name;
1154 (*rfk)->get_state = get_state;
1155 (*rfk)->toggle_radio = toggle_radio;
1156 (*rfk)->state = initial_state;
1157
1158 res = rfkill_register(*rfk);
1159 if (res < 0) {
1160 printk(TPACPI_ERR
1161 "failed to register %s rfkill switch: %d\n",
1162 name, res);
1163 rfkill_free(*rfk);
1164 *rfk = NULL;
1165 return res;
1166 }
1167
1168 printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n",
1169 name, (initial_state == RFKILL_STATE_UNBLOCKED) ?
1170 "un" : (initial_state == RFKILL_STATE_SOFT_BLOCKED) ?
1171 "soft-" : "hard-");
1172 return 0;
1173 }
1174
1175 static void printk_deprecated_attribute(const char * const what,
1176 const char * const details)
1177 {
1178 tpacpi_log_usertask("deprecated sysfs attribute");
1179 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1180 "will be removed. %s\n",
1181 what, details);
1182 }
1183
1184 static void printk_deprecated_rfkill_attribute(const char * const what)
1185 {
1186 printk_deprecated_attribute(what,
1187 "Please switch to generic rfkill before year 2010");
1188 }
1189
1190 /*************************************************************************
1191 * thinkpad-acpi driver attributes
1192 */
1193
1194 /* interface_version --------------------------------------------------- */
1195 static ssize_t tpacpi_driver_interface_version_show(
1196 struct device_driver *drv,
1197 char *buf)
1198 {
1199 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1200 }
1201
1202 static DRIVER_ATTR(interface_version, S_IRUGO,
1203 tpacpi_driver_interface_version_show, NULL);
1204
1205 /* debug_level --------------------------------------------------------- */
1206 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1207 char *buf)
1208 {
1209 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1210 }
1211
1212 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1213 const char *buf, size_t count)
1214 {
1215 unsigned long t;
1216
1217 if (parse_strtoul(buf, 0xffff, &t))
1218 return -EINVAL;
1219
1220 dbg_level = t;
1221
1222 return count;
1223 }
1224
1225 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1226 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1227
1228 /* version ------------------------------------------------------------- */
1229 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1230 char *buf)
1231 {
1232 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1233 TPACPI_DESC, TPACPI_VERSION);
1234 }
1235
1236 static DRIVER_ATTR(version, S_IRUGO,
1237 tpacpi_driver_version_show, NULL);
1238
1239 /* --------------------------------------------------------------------- */
1240
1241 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1242
1243 static void tpacpi_send_radiosw_update(void);
1244
1245 /* wlsw_emulstate ------------------------------------------------------ */
1246 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1247 char *buf)
1248 {
1249 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1250 }
1251
1252 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1253 const char *buf, size_t count)
1254 {
1255 unsigned long t;
1256
1257 if (parse_strtoul(buf, 1, &t))
1258 return -EINVAL;
1259
1260 if (tpacpi_wlsw_emulstate != t) {
1261 tpacpi_wlsw_emulstate = !!t;
1262 tpacpi_send_radiosw_update();
1263 } else
1264 tpacpi_wlsw_emulstate = !!t;
1265
1266 return count;
1267 }
1268
1269 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1270 tpacpi_driver_wlsw_emulstate_show,
1271 tpacpi_driver_wlsw_emulstate_store);
1272
1273 /* bluetooth_emulstate ------------------------------------------------- */
1274 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1275 struct device_driver *drv,
1276 char *buf)
1277 {
1278 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1279 }
1280
1281 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1282 struct device_driver *drv,
1283 const char *buf, size_t count)
1284 {
1285 unsigned long t;
1286
1287 if (parse_strtoul(buf, 1, &t))
1288 return -EINVAL;
1289
1290 tpacpi_bluetooth_emulstate = !!t;
1291
1292 return count;
1293 }
1294
1295 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1296 tpacpi_driver_bluetooth_emulstate_show,
1297 tpacpi_driver_bluetooth_emulstate_store);
1298
1299 /* wwan_emulstate ------------------------------------------------- */
1300 static ssize_t tpacpi_driver_wwan_emulstate_show(
1301 struct device_driver *drv,
1302 char *buf)
1303 {
1304 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1305 }
1306
1307 static ssize_t tpacpi_driver_wwan_emulstate_store(
1308 struct device_driver *drv,
1309 const char *buf, size_t count)
1310 {
1311 unsigned long t;
1312
1313 if (parse_strtoul(buf, 1, &t))
1314 return -EINVAL;
1315
1316 tpacpi_wwan_emulstate = !!t;
1317
1318 return count;
1319 }
1320
1321 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1322 tpacpi_driver_wwan_emulstate_show,
1323 tpacpi_driver_wwan_emulstate_store);
1324
1325 /* uwb_emulstate ------------------------------------------------- */
1326 static ssize_t tpacpi_driver_uwb_emulstate_show(
1327 struct device_driver *drv,
1328 char *buf)
1329 {
1330 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1331 }
1332
1333 static ssize_t tpacpi_driver_uwb_emulstate_store(
1334 struct device_driver *drv,
1335 const char *buf, size_t count)
1336 {
1337 unsigned long t;
1338
1339 if (parse_strtoul(buf, 1, &t))
1340 return -EINVAL;
1341
1342 tpacpi_uwb_emulstate = !!t;
1343
1344 return count;
1345 }
1346
1347 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1348 tpacpi_driver_uwb_emulstate_show,
1349 tpacpi_driver_uwb_emulstate_store);
1350 #endif
1351
1352 /* --------------------------------------------------------------------- */
1353
1354 static struct driver_attribute *tpacpi_driver_attributes[] = {
1355 &driver_attr_debug_level, &driver_attr_version,
1356 &driver_attr_interface_version,
1357 };
1358
1359 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1360 {
1361 int i, res;
1362
1363 i = 0;
1364 res = 0;
1365 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1366 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1367 i++;
1368 }
1369
1370 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1371 if (!res && dbg_wlswemul)
1372 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1373 if (!res && dbg_bluetoothemul)
1374 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1375 if (!res && dbg_wwanemul)
1376 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1377 if (!res && dbg_uwbemul)
1378 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1379 #endif
1380
1381 return res;
1382 }
1383
1384 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1385 {
1386 int i;
1387
1388 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1389 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1390
1391 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1392 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1393 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1394 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1395 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1396 #endif
1397 }
1398
1399 /*************************************************************************
1400 * Firmware Data
1401 */
1402
1403 /*
1404 * Table of recommended minimum BIOS versions
1405 *
1406 * Reasons for listing:
1407 * 1. Stable BIOS, listed because the unknown ammount of
1408 * bugs and bad ACPI behaviour on older versions
1409 *
1410 * 2. BIOS or EC fw with known bugs that trigger on Linux
1411 *
1412 * 3. BIOS with known reduced functionality in older versions
1413 *
1414 * We recommend the latest BIOS and EC version.
1415 * We only support the latest BIOS and EC fw version as a rule.
1416 *
1417 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1418 * Information from users in ThinkWiki
1419 *
1420 * WARNING: we use this table also to detect that the machine is
1421 * a ThinkPad in some cases, so don't remove entries lightly.
1422 */
1423
1424 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1425 { .vendor = (__v), \
1426 .bios = TPID(__id1, __id2), \
1427 .ec = TPACPI_MATCH_ANY, \
1428 .quirks = TPACPI_MATCH_ANY << 16 \
1429 | (__bv1) << 8 | (__bv2) }
1430
1431 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1432 __eid, __ev1, __ev2) \
1433 { .vendor = (__v), \
1434 .bios = TPID(__bid1, __bid2), \
1435 .ec = __eid, \
1436 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1437 | (__bv1) << 8 | (__bv2) }
1438
1439 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1440 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1441
1442 /* Outdated IBM BIOSes often lack the EC id string */
1443 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1444 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1445 __bv1, __bv2, TPID(__id1, __id2), \
1446 __ev1, __ev2), \
1447 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1448 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1449 __ev1, __ev2)
1450
1451 /* Outdated IBM BIOSes often lack the EC id string */
1452 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1453 __eid1, __eid2, __ev1, __ev2) \
1454 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1455 __bv1, __bv2, TPID(__eid1, __eid2), \
1456 __ev1, __ev2), \
1457 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1458 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1459 __ev1, __ev2)
1460
1461 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1462 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1463
1464 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1465 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1466 __bv1, __bv2, TPID(__id1, __id2), \
1467 __ev1, __ev2)
1468
1469 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1470 __eid1, __eid2, __ev1, __ev2) \
1471 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1472 __bv1, __bv2, TPID(__eid1, __eid2), \
1473 __ev1, __ev2)
1474
1475 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1476 /* Numeric models ------------------ */
1477 /* FW MODEL BIOS VERS */
1478 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1479 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1480 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1481 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1482 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1483 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1484 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1485 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1486 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1487
1488 /* A-series ------------------------- */
1489 /* FW MODEL BIOS VERS EC VERS */
1490 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1491 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1492 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1493 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1494 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1495 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1496 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1497 TPV_QI0('1', '3', '2', '0'), /* A22m */
1498 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1499 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1500 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1501
1502 /* G-series ------------------------- */
1503 /* FW MODEL BIOS VERS */
1504 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1505 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1506
1507 /* R-series, T-series --------------- */
1508 /* FW MODEL BIOS VERS EC VERS */
1509 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1510 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1511 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1512 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1513 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1514 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1515 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1516 T40/p, T41/p, T42/p (1) */
1517 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1518 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1519 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1520 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1521
1522 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1523 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1524 TPV_QI0('1', '6', '3', '2'), /* T22 */
1525 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1526 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1527 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1528
1529 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1530 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1531 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1532
1533 /* BIOS FW BIOS VERS EC FW EC VERS */
1534 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1535 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1536
1537 /* X-series ------------------------- */
1538 /* FW MODEL BIOS VERS EC VERS */
1539 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1540 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1541 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1542 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1543 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1544 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1545 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1546
1547 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1548 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1549
1550 /* (0) - older versions lack DMI EC fw string and functionality */
1551 /* (1) - older versions known to lack functionality */
1552 };
1553
1554 #undef TPV_QL1
1555 #undef TPV_QL0
1556 #undef TPV_QI2
1557 #undef TPV_QI1
1558 #undef TPV_QI0
1559 #undef TPV_Q_X
1560 #undef TPV_Q
1561
1562 static void __init tpacpi_check_outdated_fw(void)
1563 {
1564 unsigned long fwvers;
1565 u16 ec_version, bios_version;
1566
1567 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1568 ARRAY_SIZE(tpacpi_bios_version_qtable));
1569
1570 if (!fwvers)
1571 return;
1572
1573 bios_version = fwvers & 0xffffU;
1574 ec_version = (fwvers >> 16) & 0xffffU;
1575
1576 /* note that unknown versions are set to 0x0000 and we use that */
1577 if ((bios_version > thinkpad_id.bios_release) ||
1578 (ec_version > thinkpad_id.ec_release &&
1579 ec_version != TPACPI_MATCH_ANY)) {
1580 /*
1581 * The changelogs would let us track down the exact
1582 * reason, but it is just too much of a pain to track
1583 * it. We only list BIOSes that are either really
1584 * broken, or really stable to begin with, so it is
1585 * best if the user upgrades the firmware anyway.
1586 */
1587 printk(TPACPI_WARN
1588 "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1589 printk(TPACPI_WARN
1590 "WARNING: This firmware may be missing critical bug "
1591 "fixes and/or important features\n");
1592 }
1593 }
1594
1595 static bool __init tpacpi_is_fw_known(void)
1596 {
1597 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1598 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1599 }
1600
1601 /****************************************************************************
1602 ****************************************************************************
1603 *
1604 * Subdrivers
1605 *
1606 ****************************************************************************
1607 ****************************************************************************/
1608
1609 /*************************************************************************
1610 * thinkpad-acpi init subdriver
1611 */
1612
1613 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1614 {
1615 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1616 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1617
1618 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1619 (thinkpad_id.bios_version_str) ?
1620 thinkpad_id.bios_version_str : "unknown",
1621 (thinkpad_id.ec_version_str) ?
1622 thinkpad_id.ec_version_str : "unknown");
1623
1624 if (thinkpad_id.vendor && thinkpad_id.model_str)
1625 printk(TPACPI_INFO "%s %s, model %s\n",
1626 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1627 "IBM" : ((thinkpad_id.vendor ==
1628 PCI_VENDOR_ID_LENOVO) ?
1629 "Lenovo" : "Unknown vendor"),
1630 thinkpad_id.model_str,
1631 (thinkpad_id.nummodel_str) ?
1632 thinkpad_id.nummodel_str : "unknown");
1633
1634 tpacpi_check_outdated_fw();
1635 return 0;
1636 }
1637
1638 static int thinkpad_acpi_driver_read(char *p)
1639 {
1640 int len = 0;
1641
1642 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1643 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1644
1645 return len;
1646 }
1647
1648 static struct ibm_struct thinkpad_acpi_driver_data = {
1649 .name = "driver",
1650 .read = thinkpad_acpi_driver_read,
1651 };
1652
1653 /*************************************************************************
1654 * Hotkey subdriver
1655 */
1656
1657 /*
1658 * ThinkPad firmware event model
1659 *
1660 * The ThinkPad firmware has two main event interfaces: normal ACPI
1661 * notifications (which follow the ACPI standard), and a private event
1662 * interface.
1663 *
1664 * The private event interface also issues events for the hotkeys. As
1665 * the driver gained features, the event handling code ended up being
1666 * built around the hotkey subdriver. This will need to be refactored
1667 * to a more formal event API eventually.
1668 *
1669 * Some "hotkeys" are actually supposed to be used as event reports,
1670 * such as "brightness has changed", "volume has changed", depending on
1671 * the ThinkPad model and how the firmware is operating.
1672 *
1673 * Unlike other classes, hotkey-class events have mask/unmask control on
1674 * non-ancient firmware. However, how it behaves changes a lot with the
1675 * firmware model and version.
1676 */
1677
1678 enum { /* hot key scan codes (derived from ACPI DSDT) */
1679 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1680 TP_ACPI_HOTKEYSCAN_FNF2,
1681 TP_ACPI_HOTKEYSCAN_FNF3,
1682 TP_ACPI_HOTKEYSCAN_FNF4,
1683 TP_ACPI_HOTKEYSCAN_FNF5,
1684 TP_ACPI_HOTKEYSCAN_FNF6,
1685 TP_ACPI_HOTKEYSCAN_FNF7,
1686 TP_ACPI_HOTKEYSCAN_FNF8,
1687 TP_ACPI_HOTKEYSCAN_FNF9,
1688 TP_ACPI_HOTKEYSCAN_FNF10,
1689 TP_ACPI_HOTKEYSCAN_FNF11,
1690 TP_ACPI_HOTKEYSCAN_FNF12,
1691 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1692 TP_ACPI_HOTKEYSCAN_FNINSERT,
1693 TP_ACPI_HOTKEYSCAN_FNDELETE,
1694 TP_ACPI_HOTKEYSCAN_FNHOME,
1695 TP_ACPI_HOTKEYSCAN_FNEND,
1696 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1697 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1698 TP_ACPI_HOTKEYSCAN_FNSPACE,
1699 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1700 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1701 TP_ACPI_HOTKEYSCAN_MUTE,
1702 TP_ACPI_HOTKEYSCAN_THINKPAD,
1703 };
1704
1705 enum { /* Keys/events available through NVRAM polling */
1706 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1707 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1708 };
1709
1710 enum { /* Positions of some of the keys in hotkey masks */
1711 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1712 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1713 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1714 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1715 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1716 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1717 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1718 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1719 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1720 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1721 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1722 };
1723
1724 enum { /* NVRAM to ACPI HKEY group map */
1725 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1726 TP_ACPI_HKEY_ZOOM_MASK |
1727 TP_ACPI_HKEY_DISPSWTCH_MASK |
1728 TP_ACPI_HKEY_HIBERNATE_MASK,
1729 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1730 TP_ACPI_HKEY_BRGHTDWN_MASK,
1731 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1732 TP_ACPI_HKEY_VOLDWN_MASK |
1733 TP_ACPI_HKEY_MUTE_MASK,
1734 };
1735
1736 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1737 struct tp_nvram_state {
1738 u16 thinkpad_toggle:1;
1739 u16 zoom_toggle:1;
1740 u16 display_toggle:1;
1741 u16 thinklight_toggle:1;
1742 u16 hibernate_toggle:1;
1743 u16 displayexp_toggle:1;
1744 u16 display_state:1;
1745 u16 brightness_toggle:1;
1746 u16 volume_toggle:1;
1747 u16 mute:1;
1748
1749 u8 brightness_level;
1750 u8 volume_level;
1751 };
1752
1753 /* kthread for the hotkey poller */
1754 static struct task_struct *tpacpi_hotkey_task;
1755
1756 /* Acquired while the poller kthread is running, use to sync start/stop */
1757 static struct mutex hotkey_thread_mutex;
1758
1759 /*
1760 * Acquire mutex to write poller control variables as an
1761 * atomic block.
1762 *
1763 * Increment hotkey_config_change when changing them if you
1764 * want the kthread to forget old state.
1765 *
1766 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1767 */
1768 static struct mutex hotkey_thread_data_mutex;
1769 static unsigned int hotkey_config_change;
1770
1771 /*
1772 * hotkey poller control variables
1773 *
1774 * Must be atomic or readers will also need to acquire mutex
1775 *
1776 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1777 * should be used only when the changes need to be taken as
1778 * a block, OR when one needs to force the kthread to forget
1779 * old state.
1780 */
1781 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1782 static unsigned int hotkey_poll_freq = 10; /* Hz */
1783
1784 #define HOTKEY_CONFIG_CRITICAL_START \
1785 do { \
1786 mutex_lock(&hotkey_thread_data_mutex); \
1787 hotkey_config_change++; \
1788 } while (0);
1789 #define HOTKEY_CONFIG_CRITICAL_END \
1790 mutex_unlock(&hotkey_thread_data_mutex);
1791
1792 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1793
1794 #define hotkey_source_mask 0U
1795 #define HOTKEY_CONFIG_CRITICAL_START
1796 #define HOTKEY_CONFIG_CRITICAL_END
1797
1798 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1799
1800 static struct mutex hotkey_mutex;
1801
1802 static enum { /* Reasons for waking up */
1803 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1804 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1805 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1806 } hotkey_wakeup_reason;
1807
1808 static int hotkey_autosleep_ack;
1809
1810 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
1811 static u32 hotkey_all_mask; /* all events supported in fw */
1812 static u32 hotkey_reserved_mask; /* events better left disabled */
1813 static u32 hotkey_driver_mask; /* events needed by the driver */
1814 static u32 hotkey_user_mask; /* events visible to userspace */
1815 static u32 hotkey_acpi_mask; /* events enabled in firmware */
1816
1817 static unsigned int hotkey_report_mode;
1818
1819 static u16 *hotkey_keycode_map;
1820
1821 static struct attribute_set *hotkey_dev_attributes;
1822
1823 static void tpacpi_driver_event(const unsigned int hkey_event);
1824 static void hotkey_driver_event(const unsigned int scancode);
1825
1826 /* HKEY.MHKG() return bits */
1827 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1828
1829 static int hotkey_get_wlsw(int *status)
1830 {
1831 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1832 if (dbg_wlswemul) {
1833 *status = !!tpacpi_wlsw_emulstate;
1834 return 0;
1835 }
1836 #endif
1837 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1838 return -EIO;
1839 return 0;
1840 }
1841
1842 static int hotkey_get_tablet_mode(int *status)
1843 {
1844 int s;
1845
1846 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1847 return -EIO;
1848
1849 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1850 return 0;
1851 }
1852
1853 /*
1854 * Reads current event mask from firmware, and updates
1855 * hotkey_acpi_mask accordingly. Also resets any bits
1856 * from hotkey_user_mask that are unavailable to be
1857 * delivered (shadow requirement of the userspace ABI).
1858 *
1859 * Call with hotkey_mutex held
1860 */
1861 static int hotkey_mask_get(void)
1862 {
1863 if (tp_features.hotkey_mask) {
1864 u32 m = 0;
1865
1866 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1867 return -EIO;
1868
1869 hotkey_acpi_mask = m;
1870 } else {
1871 /* no mask support doesn't mean no event support... */
1872 hotkey_acpi_mask = hotkey_all_mask;
1873 }
1874
1875 /* sync userspace-visible mask */
1876 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
1877
1878 return 0;
1879 }
1880
1881 void static hotkey_mask_warn_incomplete_mask(void)
1882 {
1883 /* log only what the user can fix... */
1884 const u32 wantedmask = hotkey_driver_mask &
1885 ~(hotkey_acpi_mask | hotkey_source_mask) &
1886 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
1887
1888 if (wantedmask)
1889 printk(TPACPI_NOTICE
1890 "required events 0x%08x not enabled!\n",
1891 wantedmask);
1892 }
1893
1894 /*
1895 * Set the firmware mask when supported
1896 *
1897 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
1898 *
1899 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
1900 *
1901 * Call with hotkey_mutex held
1902 */
1903 static int hotkey_mask_set(u32 mask)
1904 {
1905 int i;
1906 int rc = 0;
1907
1908 const u32 fwmask = mask & ~hotkey_source_mask;
1909
1910 if (tp_features.hotkey_mask) {
1911 for (i = 0; i < 32; i++) {
1912 if (!acpi_evalf(hkey_handle,
1913 NULL, "MHKM", "vdd", i + 1,
1914 !!(mask & (1 << i)))) {
1915 rc = -EIO;
1916 break;
1917 }
1918 }
1919 }
1920
1921 /*
1922 * We *must* make an inconditional call to hotkey_mask_get to
1923 * refresh hotkey_acpi_mask and update hotkey_user_mask
1924 *
1925 * Take the opportunity to also log when we cannot _enable_
1926 * a given event.
1927 */
1928 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
1929 printk(TPACPI_NOTICE
1930 "asked for hotkey mask 0x%08x, but "
1931 "firmware forced it to 0x%08x\n",
1932 fwmask, hotkey_acpi_mask);
1933 }
1934
1935 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
1936 hotkey_mask_warn_incomplete_mask();
1937
1938 return rc;
1939 }
1940
1941 /*
1942 * Sets hotkey_user_mask and tries to set the firmware mask
1943 *
1944 * Call with hotkey_mutex held
1945 */
1946 static int hotkey_user_mask_set(const u32 mask)
1947 {
1948 int rc;
1949
1950 /* Give people a chance to notice they are doing something that
1951 * is bound to go boom on their users sooner or later */
1952 if (!tp_warned.hotkey_mask_ff &&
1953 (mask == 0xffff || mask == 0xffffff ||
1954 mask == 0xffffffff)) {
1955 tp_warned.hotkey_mask_ff = 1;
1956 printk(TPACPI_NOTICE
1957 "setting the hotkey mask to 0x%08x is likely "
1958 "not the best way to go about it\n", mask);
1959 printk(TPACPI_NOTICE
1960 "please consider using the driver defaults, "
1961 "and refer to up-to-date thinkpad-acpi "
1962 "documentation\n");
1963 }
1964
1965 /* Try to enable what the user asked for, plus whatever we need.
1966 * this syncs everything but won't enable bits in hotkey_user_mask */
1967 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
1968
1969 /* Enable the available bits in hotkey_user_mask */
1970 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
1971
1972 return rc;
1973 }
1974
1975 /*
1976 * Sets the driver hotkey mask.
1977 *
1978 * Can be called even if the hotkey subdriver is inactive
1979 */
1980 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
1981 {
1982 int rc;
1983
1984 /* Do the right thing if hotkey_init has not been called yet */
1985 if (!tp_features.hotkey) {
1986 hotkey_driver_mask = mask;
1987 return 0;
1988 }
1989
1990 mutex_lock(&hotkey_mutex);
1991
1992 HOTKEY_CONFIG_CRITICAL_START
1993 hotkey_driver_mask = mask;
1994 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1995 hotkey_source_mask |= (mask & ~hotkey_all_mask);
1996 #endif
1997 HOTKEY_CONFIG_CRITICAL_END
1998
1999 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2000 ~hotkey_source_mask);
2001 mutex_unlock(&hotkey_mutex);
2002
2003 return rc;
2004 }
2005
2006 static int hotkey_status_get(int *status)
2007 {
2008 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2009 return -EIO;
2010
2011 return 0;
2012 }
2013
2014 static int hotkey_status_set(bool enable)
2015 {
2016 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2017 return -EIO;
2018
2019 return 0;
2020 }
2021
2022 static void tpacpi_input_send_tabletsw(void)
2023 {
2024 int state;
2025
2026 if (tp_features.hotkey_tablet &&
2027 !hotkey_get_tablet_mode(&state)) {
2028 mutex_lock(&tpacpi_inputdev_send_mutex);
2029
2030 input_report_switch(tpacpi_inputdev,
2031 SW_TABLET_MODE, !!state);
2032 input_sync(tpacpi_inputdev);
2033
2034 mutex_unlock(&tpacpi_inputdev_send_mutex);
2035 }
2036 }
2037
2038 /* Do NOT call without validating scancode first */
2039 static void tpacpi_input_send_key(const unsigned int scancode)
2040 {
2041 const unsigned int keycode = hotkey_keycode_map[scancode];
2042
2043 if (keycode != KEY_RESERVED) {
2044 mutex_lock(&tpacpi_inputdev_send_mutex);
2045
2046 input_report_key(tpacpi_inputdev, keycode, 1);
2047 if (keycode == KEY_UNKNOWN)
2048 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2049 scancode);
2050 input_sync(tpacpi_inputdev);
2051
2052 input_report_key(tpacpi_inputdev, keycode, 0);
2053 if (keycode == KEY_UNKNOWN)
2054 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2055 scancode);
2056 input_sync(tpacpi_inputdev);
2057
2058 mutex_unlock(&tpacpi_inputdev_send_mutex);
2059 }
2060 }
2061
2062 /* Do NOT call without validating scancode first */
2063 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2064 {
2065 hotkey_driver_event(scancode);
2066 if (hotkey_user_mask & (1 << scancode))
2067 tpacpi_input_send_key(scancode);
2068 }
2069
2070 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2071 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2072
2073 /* Do NOT call without validating scancode first */
2074 static void tpacpi_hotkey_send_key(unsigned int scancode)
2075 {
2076 tpacpi_input_send_key_masked(scancode);
2077 if (hotkey_report_mode < 2) {
2078 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2079 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2080 }
2081 }
2082
2083 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2084 {
2085 u8 d;
2086
2087 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2088 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2089 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2090 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2091 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2092 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2093 }
2094 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2095 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2096 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2097 }
2098 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2099 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2100 n->displayexp_toggle =
2101 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2102 }
2103 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2104 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2105 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2106 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2107 n->brightness_toggle =
2108 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2109 }
2110 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2111 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2112 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2113 >> TP_NVRAM_POS_LEVEL_VOLUME;
2114 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2115 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2116 }
2117 }
2118
2119 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2120 struct tp_nvram_state *newn,
2121 const u32 event_mask)
2122 {
2123
2124 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2125 do { \
2126 if ((event_mask & (1 << __scancode)) && \
2127 oldn->__member != newn->__member) \
2128 tpacpi_hotkey_send_key(__scancode); \
2129 } while (0)
2130
2131 #define TPACPI_MAY_SEND_KEY(__scancode) \
2132 do { \
2133 if (event_mask & (1 << __scancode)) \
2134 tpacpi_hotkey_send_key(__scancode); \
2135 } while (0)
2136
2137 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2138 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2139 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2140 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2141
2142 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2143
2144 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2145
2146 /* handle volume */
2147 if (oldn->volume_toggle != newn->volume_toggle) {
2148 if (oldn->mute != newn->mute) {
2149 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2150 }
2151 if (oldn->volume_level > newn->volume_level) {
2152 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2153 } else if (oldn->volume_level < newn->volume_level) {
2154 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2155 } else if (oldn->mute == newn->mute) {
2156 /* repeated key presses that didn't change state */
2157 if (newn->mute) {
2158 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2159 } else if (newn->volume_level != 0) {
2160 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2161 } else {
2162 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2163 }
2164 }
2165 }
2166
2167 /* handle brightness */
2168 if (oldn->brightness_toggle != newn->brightness_toggle) {
2169 if (oldn->brightness_level < newn->brightness_level) {
2170 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2171 } else if (oldn->brightness_level > newn->brightness_level) {
2172 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2173 } else {
2174 /* repeated key presses that didn't change state */
2175 if (newn->brightness_level != 0) {
2176 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2177 } else {
2178 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2179 }
2180 }
2181 }
2182
2183 #undef TPACPI_COMPARE_KEY
2184 #undef TPACPI_MAY_SEND_KEY
2185 }
2186
2187 /*
2188 * Polling driver
2189 *
2190 * We track all events in hotkey_source_mask all the time, since
2191 * most of them are edge-based. We only issue those requested by
2192 * hotkey_user_mask or hotkey_driver_mask, though.
2193 */
2194 static int hotkey_kthread(void *data)
2195 {
2196 struct tp_nvram_state s[2];
2197 u32 poll_mask, event_mask;
2198 unsigned int si, so;
2199 unsigned long t;
2200 unsigned int change_detector, must_reset;
2201 unsigned int poll_freq;
2202
2203 mutex_lock(&hotkey_thread_mutex);
2204
2205 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2206 goto exit;
2207
2208 set_freezable();
2209
2210 so = 0;
2211 si = 1;
2212 t = 0;
2213
2214 /* Initial state for compares */
2215 mutex_lock(&hotkey_thread_data_mutex);
2216 change_detector = hotkey_config_change;
2217 poll_mask = hotkey_source_mask;
2218 event_mask = hotkey_source_mask &
2219 (hotkey_driver_mask | hotkey_user_mask);
2220 poll_freq = hotkey_poll_freq;
2221 mutex_unlock(&hotkey_thread_data_mutex);
2222 hotkey_read_nvram(&s[so], poll_mask);
2223
2224 while (!kthread_should_stop()) {
2225 if (t == 0) {
2226 if (likely(poll_freq))
2227 t = 1000/poll_freq;
2228 else
2229 t = 100; /* should never happen... */
2230 }
2231 t = msleep_interruptible(t);
2232 if (unlikely(kthread_should_stop()))
2233 break;
2234 must_reset = try_to_freeze();
2235 if (t > 0 && !must_reset)
2236 continue;
2237
2238 mutex_lock(&hotkey_thread_data_mutex);
2239 if (must_reset || hotkey_config_change != change_detector) {
2240 /* forget old state on thaw or config change */
2241 si = so;
2242 t = 0;
2243 change_detector = hotkey_config_change;
2244 }
2245 poll_mask = hotkey_source_mask;
2246 event_mask = hotkey_source_mask &
2247 (hotkey_driver_mask | hotkey_user_mask);
2248 poll_freq = hotkey_poll_freq;
2249 mutex_unlock(&hotkey_thread_data_mutex);
2250
2251 if (likely(poll_mask)) {
2252 hotkey_read_nvram(&s[si], poll_mask);
2253 if (likely(si != so)) {
2254 hotkey_compare_and_issue_event(&s[so], &s[si],
2255 event_mask);
2256 }
2257 }
2258
2259 so = si;
2260 si ^= 1;
2261 }
2262
2263 exit:
2264 mutex_unlock(&hotkey_thread_mutex);
2265 return 0;
2266 }
2267
2268 /* call with hotkey_mutex held */
2269 static void hotkey_poll_stop_sync(void)
2270 {
2271 if (tpacpi_hotkey_task) {
2272 if (frozen(tpacpi_hotkey_task) ||
2273 freezing(tpacpi_hotkey_task))
2274 thaw_process(tpacpi_hotkey_task);
2275
2276 kthread_stop(tpacpi_hotkey_task);
2277 tpacpi_hotkey_task = NULL;
2278 mutex_lock(&hotkey_thread_mutex);
2279 /* at this point, the thread did exit */
2280 mutex_unlock(&hotkey_thread_mutex);
2281 }
2282 }
2283
2284 /* call with hotkey_mutex held */
2285 static void hotkey_poll_setup(bool may_warn)
2286 {
2287 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2288 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2289
2290 if (hotkey_poll_freq > 0 &&
2291 (poll_driver_mask ||
2292 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2293 if (!tpacpi_hotkey_task) {
2294 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2295 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2296 if (IS_ERR(tpacpi_hotkey_task)) {
2297 tpacpi_hotkey_task = NULL;
2298 printk(TPACPI_ERR
2299 "could not create kernel thread "
2300 "for hotkey polling\n");
2301 }
2302 }
2303 } else {
2304 hotkey_poll_stop_sync();
2305 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2306 hotkey_poll_freq == 0) {
2307 printk(TPACPI_NOTICE
2308 "hot keys 0x%08x and/or events 0x%08x "
2309 "require polling, which is currently "
2310 "disabled\n",
2311 poll_user_mask, poll_driver_mask);
2312 }
2313 }
2314 }
2315
2316 static void hotkey_poll_setup_safe(bool may_warn)
2317 {
2318 mutex_lock(&hotkey_mutex);
2319 hotkey_poll_setup(may_warn);
2320 mutex_unlock(&hotkey_mutex);
2321 }
2322
2323 /* call with hotkey_mutex held */
2324 static void hotkey_poll_set_freq(unsigned int freq)
2325 {
2326 if (!freq)
2327 hotkey_poll_stop_sync();
2328
2329 hotkey_poll_freq = freq;
2330 }
2331
2332 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2333
2334 static void hotkey_poll_setup_safe(bool __unused)
2335 {
2336 }
2337
2338 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2339
2340 static int hotkey_inputdev_open(struct input_dev *dev)
2341 {
2342 switch (tpacpi_lifecycle) {
2343 case TPACPI_LIFE_INIT:
2344 /*
2345 * hotkey_init will call hotkey_poll_setup_safe
2346 * at the appropriate moment
2347 */
2348 return 0;
2349 case TPACPI_LIFE_EXITING:
2350 return -EBUSY;
2351 case TPACPI_LIFE_RUNNING:
2352 hotkey_poll_setup_safe(false);
2353 return 0;
2354 }
2355
2356 /* Should only happen if tpacpi_lifecycle is corrupt */
2357 BUG();
2358 return -EBUSY;
2359 }
2360
2361 static void hotkey_inputdev_close(struct input_dev *dev)
2362 {
2363 /* disable hotkey polling when possible */
2364 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2365 !(hotkey_source_mask & hotkey_driver_mask))
2366 hotkey_poll_setup_safe(false);
2367 }
2368
2369 /* sysfs hotkey enable ------------------------------------------------- */
2370 static ssize_t hotkey_enable_show(struct device *dev,
2371 struct device_attribute *attr,
2372 char *buf)
2373 {
2374 int res, status;
2375
2376 printk_deprecated_attribute("hotkey_enable",
2377 "Hotkey reporting is always enabled");
2378
2379 res = hotkey_status_get(&status);
2380 if (res)
2381 return res;
2382
2383 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2384 }
2385
2386 static ssize_t hotkey_enable_store(struct device *dev,
2387 struct device_attribute *attr,
2388 const char *buf, size_t count)
2389 {
2390 unsigned long t;
2391
2392 printk_deprecated_attribute("hotkey_enable",
2393 "Hotkeys can be disabled through hotkey_mask");
2394
2395 if (parse_strtoul(buf, 1, &t))
2396 return -EINVAL;
2397
2398 if (t == 0)
2399 return -EPERM;
2400
2401 return count;
2402 }
2403
2404 static struct device_attribute dev_attr_hotkey_enable =
2405 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2406 hotkey_enable_show, hotkey_enable_store);
2407
2408 /* sysfs hotkey mask --------------------------------------------------- */
2409 static ssize_t hotkey_mask_show(struct device *dev,
2410 struct device_attribute *attr,
2411 char *buf)
2412 {
2413 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2414 }
2415
2416 static ssize_t hotkey_mask_store(struct device *dev,
2417 struct device_attribute *attr,
2418 const char *buf, size_t count)
2419 {
2420 unsigned long t;
2421 int res;
2422
2423 if (parse_strtoul(buf, 0xffffffffUL, &t))
2424 return -EINVAL;
2425
2426 if (mutex_lock_killable(&hotkey_mutex))
2427 return -ERESTARTSYS;
2428
2429 res = hotkey_user_mask_set(t);
2430
2431 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2432 hotkey_poll_setup(true);
2433 #endif
2434
2435 mutex_unlock(&hotkey_mutex);
2436
2437 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2438
2439 return (res) ? res : count;
2440 }
2441
2442 static struct device_attribute dev_attr_hotkey_mask =
2443 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2444 hotkey_mask_show, hotkey_mask_store);
2445
2446 /* sysfs hotkey bios_enabled ------------------------------------------- */
2447 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2448 struct device_attribute *attr,
2449 char *buf)
2450 {
2451 return sprintf(buf, "0\n");
2452 }
2453
2454 static struct device_attribute dev_attr_hotkey_bios_enabled =
2455 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2456
2457 /* sysfs hotkey bios_mask ---------------------------------------------- */
2458 static ssize_t hotkey_bios_mask_show(struct device *dev,
2459 struct device_attribute *attr,
2460 char *buf)
2461 {
2462 printk_deprecated_attribute("hotkey_bios_mask",
2463 "This attribute is useless.");
2464 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2465 }
2466
2467 static struct device_attribute dev_attr_hotkey_bios_mask =
2468 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2469
2470 /* sysfs hotkey all_mask ----------------------------------------------- */
2471 static ssize_t hotkey_all_mask_show(struct device *dev,
2472 struct device_attribute *attr,
2473 char *buf)
2474 {
2475 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2476 hotkey_all_mask | hotkey_source_mask);
2477 }
2478
2479 static struct device_attribute dev_attr_hotkey_all_mask =
2480 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2481
2482 /* sysfs hotkey recommended_mask --------------------------------------- */
2483 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2484 struct device_attribute *attr,
2485 char *buf)
2486 {
2487 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2488 (hotkey_all_mask | hotkey_source_mask)
2489 & ~hotkey_reserved_mask);
2490 }
2491
2492 static struct device_attribute dev_attr_hotkey_recommended_mask =
2493 __ATTR(hotkey_recommended_mask, S_IRUGO,
2494 hotkey_recommended_mask_show, NULL);
2495
2496 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2497
2498 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2499 static ssize_t hotkey_source_mask_show(struct device *dev,
2500 struct device_attribute *attr,
2501 char *buf)
2502 {
2503 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2504 }
2505
2506 static ssize_t hotkey_source_mask_store(struct device *dev,
2507 struct device_attribute *attr,
2508 const char *buf, size_t count)
2509 {
2510 unsigned long t;
2511 u32 r_ev;
2512 int rc;
2513
2514 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2515 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2516 return -EINVAL;
2517
2518 if (mutex_lock_killable(&hotkey_mutex))
2519 return -ERESTARTSYS;
2520
2521 HOTKEY_CONFIG_CRITICAL_START
2522 hotkey_source_mask = t;
2523 HOTKEY_CONFIG_CRITICAL_END
2524
2525 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2526 ~hotkey_source_mask);
2527 hotkey_poll_setup(true);
2528
2529 /* check if events needed by the driver got disabled */
2530 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2531 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2532
2533 mutex_unlock(&hotkey_mutex);
2534
2535 if (rc < 0)
2536 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2537 "firmware event mask!\n");
2538
2539 if (r_ev)
2540 printk(TPACPI_NOTICE "hotkey_source_mask: "
2541 "some important events were disabled: "
2542 "0x%04x\n", r_ev);
2543
2544 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2545
2546 return (rc < 0) ? rc : count;
2547 }
2548
2549 static struct device_attribute dev_attr_hotkey_source_mask =
2550 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2551 hotkey_source_mask_show, hotkey_source_mask_store);
2552
2553 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2554 static ssize_t hotkey_poll_freq_show(struct device *dev,
2555 struct device_attribute *attr,
2556 char *buf)
2557 {
2558 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2559 }
2560
2561 static ssize_t hotkey_poll_freq_store(struct device *dev,
2562 struct device_attribute *attr,
2563 const char *buf, size_t count)
2564 {
2565 unsigned long t;
2566
2567 if (parse_strtoul(buf, 25, &t))
2568 return -EINVAL;
2569
2570 if (mutex_lock_killable(&hotkey_mutex))
2571 return -ERESTARTSYS;
2572
2573 hotkey_poll_set_freq(t);
2574 hotkey_poll_setup(true);
2575
2576 mutex_unlock(&hotkey_mutex);
2577
2578 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2579
2580 return count;
2581 }
2582
2583 static struct device_attribute dev_attr_hotkey_poll_freq =
2584 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2585 hotkey_poll_freq_show, hotkey_poll_freq_store);
2586
2587 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2588
2589 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2590 static ssize_t hotkey_radio_sw_show(struct device *dev,
2591 struct device_attribute *attr,
2592 char *buf)
2593 {
2594 int res, s;
2595 res = hotkey_get_wlsw(&s);
2596 if (res < 0)
2597 return res;
2598
2599 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2600 }
2601
2602 static struct device_attribute dev_attr_hotkey_radio_sw =
2603 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2604
2605 static void hotkey_radio_sw_notify_change(void)
2606 {
2607 if (tp_features.hotkey_wlsw)
2608 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2609 "hotkey_radio_sw");
2610 }
2611
2612 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2613 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2614 struct device_attribute *attr,
2615 char *buf)
2616 {
2617 int res, s;
2618 res = hotkey_get_tablet_mode(&s);
2619 if (res < 0)
2620 return res;
2621
2622 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2623 }
2624
2625 static struct device_attribute dev_attr_hotkey_tablet_mode =
2626 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2627
2628 static void hotkey_tablet_mode_notify_change(void)
2629 {
2630 if (tp_features.hotkey_tablet)
2631 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2632 "hotkey_tablet_mode");
2633 }
2634
2635 /* sysfs hotkey report_mode -------------------------------------------- */
2636 static ssize_t hotkey_report_mode_show(struct device *dev,
2637 struct device_attribute *attr,
2638 char *buf)
2639 {
2640 return snprintf(buf, PAGE_SIZE, "%d\n",
2641 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2642 }
2643
2644 static struct device_attribute dev_attr_hotkey_report_mode =
2645 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2646
2647 /* sysfs wakeup reason (pollable) -------------------------------------- */
2648 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2649 struct device_attribute *attr,
2650 char *buf)
2651 {
2652 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2653 }
2654
2655 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2656 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2657
2658 static void hotkey_wakeup_reason_notify_change(void)
2659 {
2660 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2661 "wakeup_reason");
2662 }
2663
2664 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2665 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2666 struct device_attribute *attr,
2667 char *buf)
2668 {
2669 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2670 }
2671
2672 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2673 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2674 hotkey_wakeup_hotunplug_complete_show, NULL);
2675
2676 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2677 {
2678 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2679 "wakeup_hotunplug_complete");
2680 }
2681
2682 /* --------------------------------------------------------------------- */
2683
2684 static struct attribute *hotkey_attributes[] __initdata = {
2685 &dev_attr_hotkey_enable.attr,
2686 &dev_attr_hotkey_bios_enabled.attr,
2687 &dev_attr_hotkey_bios_mask.attr,
2688 &dev_attr_hotkey_report_mode.attr,
2689 &dev_attr_hotkey_wakeup_reason.attr,
2690 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2691 &dev_attr_hotkey_mask.attr,
2692 &dev_attr_hotkey_all_mask.attr,
2693 &dev_attr_hotkey_recommended_mask.attr,
2694 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2695 &dev_attr_hotkey_source_mask.attr,
2696 &dev_attr_hotkey_poll_freq.attr,
2697 #endif
2698 };
2699
2700 static void bluetooth_update_rfk(void);
2701 static void wan_update_rfk(void);
2702 static void uwb_update_rfk(void);
2703 static void tpacpi_send_radiosw_update(void)
2704 {
2705 int wlsw;
2706
2707 /* Sync these BEFORE sending any rfkill events */
2708 if (tp_features.bluetooth)
2709 bluetooth_update_rfk();
2710 if (tp_features.wan)
2711 wan_update_rfk();
2712 if (tp_features.uwb)
2713 uwb_update_rfk();
2714
2715 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2716 mutex_lock(&tpacpi_inputdev_send_mutex);
2717
2718 input_report_switch(tpacpi_inputdev,
2719 SW_RFKILL_ALL, !!wlsw);
2720 input_sync(tpacpi_inputdev);
2721
2722 mutex_unlock(&tpacpi_inputdev_send_mutex);
2723 }
2724 hotkey_radio_sw_notify_change();
2725 }
2726
2727 static void hotkey_exit(void)
2728 {
2729 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2730 mutex_lock(&hotkey_mutex);
2731 hotkey_poll_stop_sync();
2732 mutex_unlock(&hotkey_mutex);
2733 #endif
2734
2735 if (hotkey_dev_attributes)
2736 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2737
2738 kfree(hotkey_keycode_map);
2739
2740 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2741 "restoring original HKEY status and mask\n");
2742 /* yes, there is a bitwise or below, we want the
2743 * functions to be called even if one of them fail */
2744 if (((tp_features.hotkey_mask &&
2745 hotkey_mask_set(hotkey_orig_mask)) |
2746 hotkey_status_set(false)) != 0)
2747 printk(TPACPI_ERR
2748 "failed to restore hot key mask "
2749 "to BIOS defaults\n");
2750 }
2751
2752 static void __init hotkey_unmap(const unsigned int scancode)
2753 {
2754 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
2755 clear_bit(hotkey_keycode_map[scancode],
2756 tpacpi_inputdev->keybit);
2757 hotkey_keycode_map[scancode] = KEY_RESERVED;
2758 }
2759 }
2760
2761 /*
2762 * HKEY quirks:
2763 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
2764 */
2765
2766 #define TPACPI_HK_Q_INIMASK 0x0001
2767
2768 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
2769 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
2770 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
2771 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
2772 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
2773 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
2774 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
2775 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
2776 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
2777 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
2778 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
2779 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
2780 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
2781 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
2782 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
2783 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
2784 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
2785 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
2786 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
2787 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
2788 };
2789
2790 static int __init hotkey_init(struct ibm_init_struct *iibm)
2791 {
2792 /* Requirements for changing the default keymaps:
2793 *
2794 * 1. Many of the keys are mapped to KEY_RESERVED for very
2795 * good reasons. Do not change them unless you have deep
2796 * knowledge on the IBM and Lenovo ThinkPad firmware for
2797 * the various ThinkPad models. The driver behaves
2798 * differently for KEY_RESERVED: such keys have their
2799 * hot key mask *unset* in mask_recommended, and also
2800 * in the initial hot key mask programmed into the
2801 * firmware at driver load time, which means the firm-
2802 * ware may react very differently if you change them to
2803 * something else;
2804 *
2805 * 2. You must be subscribed to the linux-thinkpad and
2806 * ibm-acpi-devel mailing lists, and you should read the
2807 * list archives since 2007 if you want to change the
2808 * keymaps. This requirement exists so that you will
2809 * know the past history of problems with the thinkpad-
2810 * acpi driver keymaps, and also that you will be
2811 * listening to any bug reports;
2812 *
2813 * 3. Do not send thinkpad-acpi specific patches directly to
2814 * for merging, *ever*. Send them to the linux-acpi
2815 * mailinglist for comments. Merging is to be done only
2816 * through acpi-test and the ACPI maintainer.
2817 *
2818 * If the above is too much to ask, don't change the keymap.
2819 * Ask the thinkpad-acpi maintainer to do it, instead.
2820 */
2821 static u16 ibm_keycode_map[] __initdata = {
2822 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2823 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2824 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2825 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2826
2827 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2828 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2829 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2830 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2831
2832 /* brightness: firmware always reacts to them */
2833 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2834 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2835
2836 /* Thinklight: firmware always react to it */
2837 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2838
2839 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2840 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2841
2842 /* Volume: firmware always react to it and reprograms
2843 * the built-in *extra* mixer. Never map it to control
2844 * another mixer by default. */
2845 KEY_RESERVED, /* 0x14: VOLUME UP */
2846 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2847 KEY_RESERVED, /* 0x16: MUTE */
2848
2849 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2850
2851 /* (assignments unknown, please report if found) */
2852 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2853 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2854 };
2855 static u16 lenovo_keycode_map[] __initdata = {
2856 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2857 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2858 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2859 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2860
2861 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2862 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2863 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2864 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2865
2866 /* These should be enabled --only-- when ACPI video
2867 * is disabled (i.e. in "vendor" mode), and are handled
2868 * in a special way by the init code */
2869 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
2870 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
2871
2872 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2873
2874 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2875 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2876
2877 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2878 * react to it and reprograms the built-in *extra* mixer.
2879 * Never map it to control another mixer by default.
2880 *
2881 * T60?, T61, R60?, R61: firmware and EC tries to send
2882 * these over the regular keyboard, so these are no-ops,
2883 * but there are still weird bugs re. MUTE, so do not
2884 * change unless you get test reports from all Lenovo
2885 * models. May cause the BIOS to interfere with the
2886 * HDA mixer.
2887 */
2888 KEY_RESERVED, /* 0x14: VOLUME UP */
2889 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2890 KEY_RESERVED, /* 0x16: MUTE */
2891
2892 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2893
2894 /* (assignments unknown, please report if found) */
2895 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2896 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2897 };
2898
2899 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2900 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2901 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2902
2903 int res, i;
2904 int status;
2905 int hkeyv;
2906 bool radiosw_state = false;
2907 bool tabletsw_state = false;
2908
2909 unsigned long quirks;
2910
2911 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2912 "initializing hotkey subdriver\n");
2913
2914 BUG_ON(!tpacpi_inputdev);
2915 BUG_ON(tpacpi_inputdev->open != NULL ||
2916 tpacpi_inputdev->close != NULL);
2917
2918 TPACPI_ACPIHANDLE_INIT(hkey);
2919 mutex_init(&hotkey_mutex);
2920
2921 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2922 mutex_init(&hotkey_thread_mutex);
2923 mutex_init(&hotkey_thread_data_mutex);
2924 #endif
2925
2926 /* hotkey not supported on 570 */
2927 tp_features.hotkey = hkey_handle != NULL;
2928
2929 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2930 "hotkeys are %s\n",
2931 str_supported(tp_features.hotkey));
2932
2933 if (!tp_features.hotkey)
2934 return 1;
2935
2936 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
2937 ARRAY_SIZE(tpacpi_hotkey_qtable));
2938
2939 tpacpi_disable_brightness_delay();
2940
2941 /* MUST have enough space for all attributes to be added to
2942 * hotkey_dev_attributes */
2943 hotkey_dev_attributes = create_attr_set(
2944 ARRAY_SIZE(hotkey_attributes) + 2,
2945 NULL);
2946 if (!hotkey_dev_attributes)
2947 return -ENOMEM;
2948 res = add_many_to_attr_set(hotkey_dev_attributes,
2949 hotkey_attributes,
2950 ARRAY_SIZE(hotkey_attributes));
2951 if (res)
2952 goto err_exit;
2953
2954 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
2955 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2956 for HKEY interface version 0x100 */
2957 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2958 if ((hkeyv >> 8) != 1) {
2959 printk(TPACPI_ERR "unknown version of the "
2960 "HKEY interface: 0x%x\n", hkeyv);
2961 printk(TPACPI_ERR "please report this to %s\n",
2962 TPACPI_MAIL);
2963 } else {
2964 /*
2965 * MHKV 0x100 in A31, R40, R40e,
2966 * T4x, X31, and later
2967 */
2968 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2969 "firmware HKEY interface version: 0x%x\n",
2970 hkeyv);
2971
2972 /* Paranoia check AND init hotkey_all_mask */
2973 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2974 "MHKA", "qd")) {
2975 printk(TPACPI_ERR
2976 "missing MHKA handler, "
2977 "please report this to %s\n",
2978 TPACPI_MAIL);
2979 /* Fallback: pre-init for FN+F3,F4,F12 */
2980 hotkey_all_mask = 0x080cU;
2981 } else {
2982 tp_features.hotkey_mask = 1;
2983 }
2984 }
2985 }
2986
2987 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2988 "hotkey masks are %s\n",
2989 str_supported(tp_features.hotkey_mask));
2990
2991 /* Init hotkey_all_mask if not initialized yet */
2992 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
2993 (quirks & TPACPI_HK_Q_INIMASK))
2994 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
2995
2996 /* Init hotkey_acpi_mask and hotkey_orig_mask */
2997 if (tp_features.hotkey_mask) {
2998 /* hotkey_source_mask *must* be zero for
2999 * the first hotkey_mask_get to return hotkey_orig_mask */
3000 res = hotkey_mask_get();
3001 if (res)
3002 goto err_exit;
3003
3004 hotkey_orig_mask = hotkey_acpi_mask;
3005 } else {
3006 hotkey_orig_mask = hotkey_all_mask;
3007 hotkey_acpi_mask = hotkey_all_mask;
3008 }
3009
3010 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3011 if (dbg_wlswemul) {
3012 tp_features.hotkey_wlsw = 1;
3013 radiosw_state = !!tpacpi_wlsw_emulstate;
3014 printk(TPACPI_INFO
3015 "radio switch emulation enabled\n");
3016 } else
3017 #endif
3018 /* Not all thinkpads have a hardware radio switch */
3019 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3020 tp_features.hotkey_wlsw = 1;
3021 radiosw_state = !!status;
3022 printk(TPACPI_INFO
3023 "radio switch found; radios are %s\n",
3024 enabled(status, 0));
3025 }
3026 if (tp_features.hotkey_wlsw)
3027 res = add_to_attr_set(hotkey_dev_attributes,
3028 &dev_attr_hotkey_radio_sw.attr);
3029
3030 /* For X41t, X60t, X61t Tablets... */
3031 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3032 tp_features.hotkey_tablet = 1;
3033 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3034 printk(TPACPI_INFO
3035 "possible tablet mode switch found; "
3036 "ThinkPad in %s mode\n",
3037 (tabletsw_state) ? "tablet" : "laptop");
3038 res = add_to_attr_set(hotkey_dev_attributes,
3039 &dev_attr_hotkey_tablet_mode.attr);
3040 }
3041
3042 if (!res)
3043 res = register_attr_set_with_sysfs(
3044 hotkey_dev_attributes,
3045 &tpacpi_pdev->dev.kobj);
3046 if (res)
3047 goto err_exit;
3048
3049 /* Set up key map */
3050
3051 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3052 GFP_KERNEL);
3053 if (!hotkey_keycode_map) {
3054 printk(TPACPI_ERR
3055 "failed to allocate memory for key map\n");
3056 res = -ENOMEM;
3057 goto err_exit;
3058 }
3059
3060 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3061 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3062 "using Lenovo default hot key map\n");
3063 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3064 TPACPI_HOTKEY_MAP_SIZE);
3065 } else {
3066 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3067 "using IBM default hot key map\n");
3068 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3069 TPACPI_HOTKEY_MAP_SIZE);
3070 }
3071
3072 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3073 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3074 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3075 tpacpi_inputdev->keycode = hotkey_keycode_map;
3076 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3077 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3078 input_set_capability(tpacpi_inputdev, EV_KEY,
3079 hotkey_keycode_map[i]);
3080 } else {
3081 if (i < sizeof(hotkey_reserved_mask)*8)
3082 hotkey_reserved_mask |= 1 << i;
3083 }
3084 }
3085
3086 if (tp_features.hotkey_wlsw) {
3087 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3088 input_report_switch(tpacpi_inputdev,
3089 SW_RFKILL_ALL, radiosw_state);
3090 }
3091 if (tp_features.hotkey_tablet) {
3092 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3093 input_report_switch(tpacpi_inputdev,
3094 SW_TABLET_MODE, tabletsw_state);
3095 }
3096
3097 /* Do not issue duplicate brightness change events to
3098 * userspace */
3099 if (!tp_features.bright_acpimode)
3100 /* update bright_acpimode... */
3101 tpacpi_check_std_acpi_brightness_support();
3102
3103 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3104 printk(TPACPI_INFO
3105 "This ThinkPad has standard ACPI backlight "
3106 "brightness control, supported by the ACPI "
3107 "video driver\n");
3108 printk(TPACPI_NOTICE
3109 "Disabling thinkpad-acpi brightness events "
3110 "by default...\n");
3111
3112 /* Disable brightness up/down on Lenovo thinkpads when
3113 * ACPI is handling them, otherwise it is plain impossible
3114 * for userspace to do something even remotely sane */
3115 hotkey_reserved_mask |=
3116 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3117 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3118 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3119 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3120 }
3121
3122 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3123 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3124 & ~hotkey_all_mask
3125 & ~hotkey_reserved_mask;
3126
3127 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3128 "hotkey source mask 0x%08x, polling freq %u\n",
3129 hotkey_source_mask, hotkey_poll_freq);
3130 #endif
3131
3132 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3133 "enabling firmware HKEY event interface...\n");
3134 res = hotkey_status_set(true);
3135 if (res) {
3136 hotkey_exit();
3137 return res;
3138 }
3139 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3140 | hotkey_driver_mask)
3141 & ~hotkey_source_mask);
3142 if (res < 0 && res != -ENXIO) {
3143 hotkey_exit();
3144 return res;
3145 }
3146 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3147 & ~hotkey_reserved_mask;
3148 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3149 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3150 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3151
3152 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3153 "legacy ibm/hotkey event reporting over procfs %s\n",
3154 (hotkey_report_mode < 2) ?
3155 "enabled" : "disabled");
3156
3157 tpacpi_inputdev->open = &hotkey_inputdev_open;
3158 tpacpi_inputdev->close = &hotkey_inputdev_close;
3159
3160 hotkey_poll_setup_safe(true);
3161
3162 return 0;
3163
3164 err_exit:
3165 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3166 hotkey_dev_attributes = NULL;
3167
3168 return (res < 0)? res : 1;
3169 }
3170
3171 static bool hotkey_notify_hotkey(const u32 hkey,
3172 bool *send_acpi_ev,
3173 bool *ignore_acpi_ev)
3174 {
3175 /* 0x1000-0x1FFF: key presses */
3176 unsigned int scancode = hkey & 0xfff;
3177 *send_acpi_ev = true;
3178 *ignore_acpi_ev = false;
3179
3180 if (scancode > 0 && scancode < 0x21) {
3181 scancode--;
3182 if (!(hotkey_source_mask & (1 << scancode))) {
3183 tpacpi_input_send_key_masked(scancode);
3184 *send_acpi_ev = false;
3185 } else {
3186 *ignore_acpi_ev = true;
3187 }
3188 return true;
3189 }
3190 return false;
3191 }
3192
3193 static bool hotkey_notify_wakeup(const u32 hkey,
3194 bool *send_acpi_ev,
3195 bool *ignore_acpi_ev)
3196 {
3197 /* 0x2000-0x2FFF: Wakeup reason */
3198 *send_acpi_ev = true;
3199 *ignore_acpi_ev = false;
3200
3201 switch (hkey) {
3202 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3203 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3204 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3205 *ignore_acpi_ev = true;
3206 break;
3207
3208 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3209 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3210 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3211 *ignore_acpi_ev = true;
3212 break;
3213
3214 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3215 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3216 printk(TPACPI_ALERT
3217 "EMERGENCY WAKEUP: battery almost empty\n");
3218 /* how to auto-heal: */
3219 /* 2313: woke up from S3, go to S4/S5 */
3220 /* 2413: woke up from S4, go to S5 */
3221 break;
3222
3223 default:
3224 return false;
3225 }
3226
3227 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3228 printk(TPACPI_INFO
3229 "woke up due to a hot-unplug "
3230 "request...\n");
3231 hotkey_wakeup_reason_notify_change();
3232 }
3233 return true;
3234 }
3235
3236 static bool hotkey_notify_usrevent(const u32 hkey,
3237 bool *send_acpi_ev,
3238 bool *ignore_acpi_ev)
3239 {
3240 /* 0x5000-0x5FFF: human interface helpers */
3241 *send_acpi_ev = true;
3242 *ignore_acpi_ev = false;
3243
3244 switch (hkey) {
3245 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3246 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3247 return true;
3248
3249 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3250 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3251 tpacpi_input_send_tabletsw();
3252 hotkey_tablet_mode_notify_change();
3253 *send_acpi_ev = false;
3254 return true;
3255
3256 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3257 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3258 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3259 /* do not propagate these events */
3260 *ignore_acpi_ev = true;
3261 return true;
3262
3263 default:
3264 return false;
3265 }
3266 }
3267
3268 static void thermal_dump_all_sensors(void);
3269
3270 static bool hotkey_notify_thermal(const u32 hkey,
3271 bool *send_acpi_ev,
3272 bool *ignore_acpi_ev)
3273 {
3274 bool known = true;
3275
3276 /* 0x6000-0x6FFF: thermal alarms */
3277 *send_acpi_ev = true;
3278 *ignore_acpi_ev = false;
3279
3280 switch (hkey) {
3281 case TP_HKEY_EV_THM_TABLE_CHANGED:
3282 printk(TPACPI_INFO
3283 "EC reports that Thermal Table has changed\n");
3284 /* recommended action: do nothing, we don't have
3285 * Lenovo ATM information */
3286 return true;
3287 case TP_HKEY_EV_ALARM_BAT_HOT:
3288 printk(TPACPI_CRIT
3289 "THERMAL ALARM: battery is too hot!\n");
3290 /* recommended action: warn user through gui */
3291 break;
3292 case TP_HKEY_EV_ALARM_BAT_XHOT:
3293 printk(TPACPI_ALERT
3294 "THERMAL EMERGENCY: battery is extremely hot!\n");
3295 /* recommended action: immediate sleep/hibernate */
3296 break;
3297 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3298 printk(TPACPI_CRIT
3299 "THERMAL ALARM: "
3300 "a sensor reports something is too hot!\n");
3301 /* recommended action: warn user through gui, that */
3302 /* some internal component is too hot */
3303 break;
3304 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3305 printk(TPACPI_ALERT
3306 "THERMAL EMERGENCY: "
3307 "a sensor reports something is extremely hot!\n");
3308 /* recommended action: immediate sleep/hibernate */
3309 break;
3310 default:
3311 printk(TPACPI_ALERT
3312 "THERMAL ALERT: unknown thermal alarm received\n");
3313 known = false;
3314 }
3315
3316 thermal_dump_all_sensors();
3317
3318 return known;
3319 }
3320
3321 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3322 {
3323 u32 hkey;
3324 bool send_acpi_ev;
3325 bool ignore_acpi_ev;
3326 bool known_ev;
3327
3328 if (event != 0x80) {
3329 printk(TPACPI_ERR
3330 "unknown HKEY notification event %d\n", event);
3331 /* forward it to userspace, maybe it knows how to handle it */
3332 acpi_bus_generate_netlink_event(
3333 ibm->acpi->device->pnp.device_class,
3334 dev_name(&ibm->acpi->device->dev),
3335 event, 0);
3336 return;
3337 }
3338
3339 while (1) {
3340 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3341 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3342 return;
3343 }
3344
3345 if (hkey == 0) {
3346 /* queue empty */
3347 return;
3348 }
3349
3350 send_acpi_ev = true;
3351 ignore_acpi_ev = false;
3352
3353 switch (hkey >> 12) {
3354 case 1:
3355 /* 0x1000-0x1FFF: key presses */
3356 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3357 &ignore_acpi_ev);
3358 break;
3359 case 2:
3360 /* 0x2000-0x2FFF: Wakeup reason */
3361 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3362 &ignore_acpi_ev);
3363 break;
3364 case 3:
3365 /* 0x3000-0x3FFF: bay-related wakeups */
3366 if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3367 hotkey_autosleep_ack = 1;
3368 printk(TPACPI_INFO
3369 "bay ejected\n");
3370 hotkey_wakeup_hotunplug_complete_notify_change();
3371 known_ev = true;
3372 } else {
3373 known_ev = false;
3374 }
3375 break;
3376 case 4:
3377 /* 0x4000-0x4FFF: dock-related wakeups */
3378 if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3379 hotkey_autosleep_ack = 1;
3380 printk(TPACPI_INFO
3381 "undocked\n");
3382 hotkey_wakeup_hotunplug_complete_notify_change();
3383 known_ev = true;
3384 } else {
3385 known_ev = false;
3386 }
3387 break;
3388 case 5:
3389 /* 0x5000-0x5FFF: human interface helpers */
3390 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3391 &ignore_acpi_ev);
3392 break;
3393 case 6:
3394 /* 0x6000-0x6FFF: thermal alarms */
3395 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3396 &ignore_acpi_ev);
3397 break;
3398 case 7:
3399 /* 0x7000-0x7FFF: misc */
3400 if (tp_features.hotkey_wlsw &&
3401 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3402 tpacpi_send_radiosw_update();
3403 send_acpi_ev = 0;
3404 known_ev = true;
3405 break;
3406 }
3407 /* fallthrough to default */
3408 default:
3409 known_ev = false;
3410 }
3411 if (!known_ev) {
3412 printk(TPACPI_NOTICE
3413 "unhandled HKEY event 0x%04x\n", hkey);
3414 printk(TPACPI_NOTICE
3415 "please report the conditions when this "
3416 "event happened to %s\n", TPACPI_MAIL);
3417 }
3418
3419 /* Legacy events */
3420 if (!ignore_acpi_ev &&
3421 (send_acpi_ev || hotkey_report_mode < 2)) {
3422 acpi_bus_generate_proc_event(ibm->acpi->device,
3423 event, hkey);
3424 }
3425
3426 /* netlink events */
3427 if (!ignore_acpi_ev && send_acpi_ev) {
3428 acpi_bus_generate_netlink_event(
3429 ibm->acpi->device->pnp.device_class,
3430 dev_name(&ibm->acpi->device->dev),
3431 event, hkey);
3432 }
3433 }
3434 }
3435
3436 static void hotkey_suspend(pm_message_t state)
3437 {
3438 /* Do these on suspend, we get the events on early resume! */
3439 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3440 hotkey_autosleep_ack = 0;
3441 }
3442
3443 static void hotkey_resume(void)
3444 {
3445 tpacpi_disable_brightness_delay();
3446
3447 if (hotkey_status_set(true) < 0 ||
3448 hotkey_mask_set(hotkey_acpi_mask) < 0)
3449 printk(TPACPI_ERR
3450 "error while attempting to reset the event "
3451 "firmware interface\n");
3452
3453 tpacpi_send_radiosw_update();
3454 hotkey_tablet_mode_notify_change();
3455 hotkey_wakeup_reason_notify_change();
3456 hotkey_wakeup_hotunplug_complete_notify_change();
3457 hotkey_poll_setup_safe(false);
3458 }
3459
3460 /* procfs -------------------------------------------------------------- */
3461 static int hotkey_read(char *p)
3462 {
3463 int res, status;
3464 int len = 0;
3465
3466 if (!tp_features.hotkey) {
3467 len += sprintf(p + len, "status:\t\tnot supported\n");
3468 return len;
3469 }
3470
3471 if (mutex_lock_killable(&hotkey_mutex))
3472 return -ERESTARTSYS;
3473 res = hotkey_status_get(&status);
3474 if (!res)
3475 res = hotkey_mask_get();
3476 mutex_unlock(&hotkey_mutex);
3477 if (res)
3478 return res;
3479
3480 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3481 if (hotkey_all_mask) {
3482 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask);
3483 len += sprintf(p + len,
3484 "commands:\tenable, disable, reset, <mask>\n");
3485 } else {
3486 len += sprintf(p + len, "mask:\t\tnot supported\n");
3487 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3488 }
3489
3490 return len;
3491 }
3492
3493 static void hotkey_enabledisable_warn(bool enable)
3494 {
3495 tpacpi_log_usertask("procfs hotkey enable/disable");
3496 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3497 TPACPI_WARN
3498 "hotkey enable/disable functionality has been "
3499 "removed from the driver. Hotkeys are always "
3500 "enabled\n"))
3501 printk(TPACPI_ERR
3502 "Please remove the hotkey=enable module "
3503 "parameter, it is deprecated. Hotkeys are always "
3504 "enabled\n");
3505 }
3506
3507 static int hotkey_write(char *buf)
3508 {
3509 int res;
3510 u32 mask;
3511 char *cmd;
3512
3513 if (!tp_features.hotkey)
3514 return -ENODEV;
3515
3516 if (mutex_lock_killable(&hotkey_mutex))
3517 return -ERESTARTSYS;
3518
3519 mask = hotkey_user_mask;
3520
3521 res = 0;
3522 while ((cmd = next_cmd(&buf))) {
3523 if (strlencmp(cmd, "enable") == 0) {
3524 hotkey_enabledisable_warn(1);
3525 } else if (strlencmp(cmd, "disable") == 0) {
3526 hotkey_enabledisable_warn(0);
3527 res = -EPERM;
3528 } else if (strlencmp(cmd, "reset") == 0) {
3529 mask = (hotkey_all_mask | hotkey_source_mask)
3530 & ~hotkey_reserved_mask;
3531 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3532 /* mask set */
3533 } else if (sscanf(cmd, "%x", &mask) == 1) {
3534 /* mask set */
3535 } else {
3536 res = -EINVAL;
3537 goto errexit;
3538 }
3539 }
3540
3541 if (!res) {
3542 tpacpi_disclose_usertask("procfs hotkey",
3543 "set mask to 0x%08x\n", mask);
3544 res = hotkey_user_mask_set(mask);
3545 }
3546
3547 errexit:
3548 mutex_unlock(&hotkey_mutex);
3549 return res;
3550 }
3551
3552 static const struct acpi_device_id ibm_htk_device_ids[] = {
3553 {TPACPI_ACPI_HKEY_HID, 0},
3554 {"", 0},
3555 };
3556
3557 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3558 .hid = ibm_htk_device_ids,
3559 .notify = hotkey_notify,
3560 .handle = &hkey_handle,
3561 .type = ACPI_DEVICE_NOTIFY,
3562 };
3563
3564 static struct ibm_struct hotkey_driver_data = {
3565 .name = "hotkey",
3566 .read = hotkey_read,
3567 .write = hotkey_write,
3568 .exit = hotkey_exit,
3569 .resume = hotkey_resume,
3570 .suspend = hotkey_suspend,
3571 .acpi = &ibm_hotkey_acpidriver,
3572 };
3573
3574 /*************************************************************************
3575 * Bluetooth subdriver
3576 */
3577
3578 enum {
3579 /* ACPI GBDC/SBDC bits */
3580 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3581 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3582 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3583 off / last state */
3584 };
3585
3586 enum {
3587 /* ACPI \BLTH commands */
3588 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3589 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3590 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3591 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3592 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3593 };
3594
3595 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3596
3597 static struct rfkill *tpacpi_bluetooth_rfkill;
3598
3599 static void bluetooth_suspend(pm_message_t state)
3600 {
3601 /* Try to make sure radio will resume powered off */
3602 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3603 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3604 vdbg_printk(TPACPI_DBG_RFKILL,
3605 "bluetooth power down on resume request failed\n");
3606 }
3607
3608 static int bluetooth_get_radiosw(void)
3609 {
3610 int status;
3611
3612 if (!tp_features.bluetooth)
3613 return -ENODEV;
3614
3615 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
3616 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3617 return RFKILL_STATE_HARD_BLOCKED;
3618
3619 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3620 if (dbg_bluetoothemul)
3621 return (tpacpi_bluetooth_emulstate) ?
3622 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3623 #endif
3624
3625 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3626 return -EIO;
3627
3628 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3629 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3630 }
3631
3632 static void bluetooth_update_rfk(void)
3633 {
3634 int status;
3635
3636 if (!tpacpi_bluetooth_rfkill)
3637 return;
3638
3639 status = bluetooth_get_radiosw();
3640 if (status < 0)
3641 return;
3642 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3643
3644 vdbg_printk(TPACPI_DBG_RFKILL,
3645 "forced rfkill state to %d\n",
3646 status);
3647 }
3648
3649 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3650 {
3651 int status;
3652
3653 if (!tp_features.bluetooth)
3654 return -ENODEV;
3655
3656 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3657 * reason to risk weird behaviour. */
3658 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3659 && radio_on)
3660 return -EPERM;
3661
3662 vdbg_printk(TPACPI_DBG_RFKILL,
3663 "will %s bluetooth\n", radio_on ? "enable" : "disable");
3664
3665 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3666 if (dbg_bluetoothemul) {
3667 tpacpi_bluetooth_emulstate = !!radio_on;
3668 if (update_rfk)
3669 bluetooth_update_rfk();
3670 return 0;
3671 }
3672 #endif
3673
3674 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3675 if (radio_on)
3676 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3677 else
3678 status = 0;
3679 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3680 return -EIO;
3681
3682 if (update_rfk)
3683 bluetooth_update_rfk();
3684
3685 return 0;
3686 }
3687
3688 /* sysfs bluetooth enable ---------------------------------------------- */
3689 static ssize_t bluetooth_enable_show(struct device *dev,
3690 struct device_attribute *attr,
3691 char *buf)
3692 {
3693 int status;
3694
3695 printk_deprecated_rfkill_attribute("bluetooth_enable");
3696
3697 status = bluetooth_get_radiosw();
3698 if (status < 0)
3699 return status;
3700
3701 return snprintf(buf, PAGE_SIZE, "%d\n",
3702 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3703 }
3704
3705 static ssize_t bluetooth_enable_store(struct device *dev,
3706 struct device_attribute *attr,
3707 const char *buf, size_t count)
3708 {
3709 unsigned long t;
3710 int res;
3711
3712 printk_deprecated_rfkill_attribute("bluetooth_enable");
3713
3714 if (parse_strtoul(buf, 1, &t))
3715 return -EINVAL;
3716
3717 tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
3718
3719 res = bluetooth_set_radiosw(t, 1);
3720
3721 return (res) ? res : count;
3722 }
3723
3724 static struct device_attribute dev_attr_bluetooth_enable =
3725 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3726 bluetooth_enable_show, bluetooth_enable_store);
3727
3728 /* --------------------------------------------------------------------- */
3729
3730 static struct attribute *bluetooth_attributes[] = {
3731 &dev_attr_bluetooth_enable.attr,
3732 NULL
3733 };
3734
3735 static const struct attribute_group bluetooth_attr_group = {
3736 .attrs = bluetooth_attributes,
3737 };
3738
3739 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3740 {
3741 int bts = bluetooth_get_radiosw();
3742
3743 if (bts < 0)
3744 return bts;
3745
3746 *state = bts;
3747 return 0;
3748 }
3749
3750 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3751 {
3752 dbg_printk(TPACPI_DBG_RFKILL,
3753 "request to change radio state to %d\n", state);
3754 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3755 }
3756
3757 static void bluetooth_shutdown(void)
3758 {
3759 /* Order firmware to save current state to NVRAM */
3760 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3761 TP_ACPI_BLTH_SAVE_STATE))
3762 printk(TPACPI_NOTICE
3763 "failed to save bluetooth state to NVRAM\n");
3764 else
3765 vdbg_printk(TPACPI_DBG_RFKILL,
3766 "bluestooth state saved to NVRAM\n");
3767 }
3768
3769 static void bluetooth_exit(void)
3770 {
3771 bluetooth_shutdown();
3772
3773 if (tpacpi_bluetooth_rfkill)
3774 rfkill_unregister(tpacpi_bluetooth_rfkill);
3775
3776 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3777 &bluetooth_attr_group);
3778 }
3779
3780 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3781 {
3782 int res;
3783 int status = 0;
3784
3785 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3786 "initializing bluetooth subdriver\n");
3787
3788 TPACPI_ACPIHANDLE_INIT(hkey);
3789
3790 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3791 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3792 tp_features.bluetooth = hkey_handle &&
3793 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3794
3795 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3796 "bluetooth is %s, status 0x%02x\n",
3797 str_supported(tp_features.bluetooth),
3798 status);
3799
3800 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3801 if (dbg_bluetoothemul) {
3802 tp_features.bluetooth = 1;
3803 printk(TPACPI_INFO
3804 "bluetooth switch emulation enabled\n");
3805 } else
3806 #endif
3807 if (tp_features.bluetooth &&
3808 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3809 /* no bluetooth hardware present in system */
3810 tp_features.bluetooth = 0;
3811 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3812 "bluetooth hardware not installed\n");
3813 }
3814
3815 if (!tp_features.bluetooth)
3816 return 1;
3817
3818 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3819 &bluetooth_attr_group);
3820 if (res)
3821 return res;
3822
3823 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3824 &tpacpi_bluetooth_rfkill,
3825 RFKILL_TYPE_BLUETOOTH,
3826 TPACPI_RFK_BLUETOOTH_SW_NAME,
3827 true,
3828 tpacpi_bluetooth_rfk_set,
3829 tpacpi_bluetooth_rfk_get);
3830 if (res) {
3831 bluetooth_exit();
3832 return res;
3833 }
3834
3835 return 0;
3836 }
3837
3838 /* procfs -------------------------------------------------------------- */
3839 static int bluetooth_read(char *p)
3840 {
3841 int len = 0;
3842 int status = bluetooth_get_radiosw();
3843
3844 if (!tp_features.bluetooth)
3845 len += sprintf(p + len, "status:\t\tnot supported\n");
3846 else {
3847 len += sprintf(p + len, "status:\t\t%s\n",
3848 (status == RFKILL_STATE_UNBLOCKED) ?
3849 "enabled" : "disabled");
3850 len += sprintf(p + len, "commands:\tenable, disable\n");
3851 }
3852
3853 return len;
3854 }
3855
3856 static int bluetooth_write(char *buf)
3857 {
3858 char *cmd;
3859 int state = -1;
3860
3861 if (!tp_features.bluetooth)
3862 return -ENODEV;
3863
3864 while ((cmd = next_cmd(&buf))) {
3865 if (strlencmp(cmd, "enable") == 0) {
3866 state = 1;
3867 } else if (strlencmp(cmd, "disable") == 0) {
3868 state = 0;
3869 } else
3870 return -EINVAL;
3871 }
3872
3873 if (state != -1) {
3874 tpacpi_disclose_usertask("procfs bluetooth",
3875 "attempt to %s\n",
3876 state ? "enable" : "disable");
3877 bluetooth_set_radiosw(state, 1);
3878 }
3879
3880 return 0;
3881 }
3882
3883 static struct ibm_struct bluetooth_driver_data = {
3884 .name = "bluetooth",
3885 .read = bluetooth_read,
3886 .write = bluetooth_write,
3887 .exit = bluetooth_exit,
3888 .suspend = bluetooth_suspend,
3889 .shutdown = bluetooth_shutdown,
3890 };
3891
3892 /*************************************************************************
3893 * Wan subdriver
3894 */
3895
3896 enum {
3897 /* ACPI GWAN/SWAN bits */
3898 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3899 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3900 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3901 off / last state */
3902 };
3903
3904 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3905
3906 static struct rfkill *tpacpi_wan_rfkill;
3907
3908 static void wan_suspend(pm_message_t state)
3909 {
3910 /* Try to make sure radio will resume powered off */
3911 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3912 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3913 vdbg_printk(TPACPI_DBG_RFKILL,
3914 "WWAN power down on resume request failed\n");
3915 }
3916
3917 static int wan_get_radiosw(void)
3918 {
3919 int status;
3920
3921 if (!tp_features.wan)
3922 return -ENODEV;
3923
3924 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3925 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3926 return RFKILL_STATE_HARD_BLOCKED;
3927
3928 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3929 if (dbg_wwanemul)
3930 return (tpacpi_wwan_emulstate) ?
3931 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3932 #endif
3933
3934 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3935 return -EIO;
3936
3937 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3938 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3939 }
3940
3941 static void wan_update_rfk(void)
3942 {
3943 int status;
3944
3945 if (!tpacpi_wan_rfkill)
3946 return;
3947
3948 status = wan_get_radiosw();
3949 if (status < 0)
3950 return;
3951 rfkill_force_state(tpacpi_wan_rfkill, status);
3952
3953 vdbg_printk(TPACPI_DBG_RFKILL,
3954 "forced rfkill state to %d\n",
3955 status);
3956 }
3957
3958 static int wan_set_radiosw(int radio_on, int update_rfk)
3959 {
3960 int status;
3961
3962 if (!tp_features.wan)
3963 return -ENODEV;
3964
3965 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3966 * reason to risk weird behaviour. */
3967 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3968 && radio_on)
3969 return -EPERM;
3970
3971 vdbg_printk(TPACPI_DBG_RFKILL,
3972 "will %s WWAN\n", radio_on ? "enable" : "disable");
3973
3974 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3975 if (dbg_wwanemul) {
3976 tpacpi_wwan_emulstate = !!radio_on;
3977 if (update_rfk)
3978 wan_update_rfk();
3979 return 0;
3980 }
3981 #endif
3982
3983 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3984 if (radio_on)
3985 status = TP_ACPI_WANCARD_RADIOSSW;
3986 else
3987 status = 0;
3988 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3989 return -EIO;
3990
3991 if (update_rfk)
3992 wan_update_rfk();
3993
3994 return 0;
3995 }
3996
3997 /* sysfs wan enable ---------------------------------------------------- */
3998 static ssize_t wan_enable_show(struct device *dev,
3999 struct device_attribute *attr,
4000 char *buf)
4001 {
4002 int status;
4003
4004 printk_deprecated_rfkill_attribute("wwan_enable");
4005
4006 status = wan_get_radiosw();
4007 if (status < 0)
4008 return status;
4009
4010 return snprintf(buf, PAGE_SIZE, "%d\n",
4011 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
4012 }
4013
4014 static ssize_t wan_enable_store(struct device *dev,
4015 struct device_attribute *attr,
4016 const char *buf, size_t count)
4017 {
4018 unsigned long t;
4019 int res;
4020
4021 printk_deprecated_rfkill_attribute("wwan_enable");
4022
4023 if (parse_strtoul(buf, 1, &t))
4024 return -EINVAL;
4025
4026 tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
4027
4028 res = wan_set_radiosw(t, 1);
4029
4030 return (res) ? res : count;
4031 }
4032
4033 static struct device_attribute dev_attr_wan_enable =
4034 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4035 wan_enable_show, wan_enable_store);
4036
4037 /* --------------------------------------------------------------------- */
4038
4039 static struct attribute *wan_attributes[] = {
4040 &dev_attr_wan_enable.attr,
4041 NULL
4042 };
4043
4044 static const struct attribute_group wan_attr_group = {
4045 .attrs = wan_attributes,
4046 };
4047
4048 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
4049 {
4050 int wans = wan_get_radiosw();
4051
4052 if (wans < 0)
4053 return wans;
4054
4055 *state = wans;
4056 return 0;
4057 }
4058
4059 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
4060 {
4061 dbg_printk(TPACPI_DBG_RFKILL,
4062 "request to change radio state to %d\n", state);
4063 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
4064 }
4065
4066 static void wan_shutdown(void)
4067 {
4068 /* Order firmware to save current state to NVRAM */
4069 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4070 TP_ACPI_WGSV_SAVE_STATE))
4071 printk(TPACPI_NOTICE
4072 "failed to save WWAN state to NVRAM\n");
4073 else
4074 vdbg_printk(TPACPI_DBG_RFKILL,
4075 "WWAN state saved to NVRAM\n");
4076 }
4077
4078 static void wan_exit(void)
4079 {
4080 wan_shutdown();
4081
4082 if (tpacpi_wan_rfkill)
4083 rfkill_unregister(tpacpi_wan_rfkill);
4084
4085 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4086 &wan_attr_group);
4087 }
4088
4089 static int __init wan_init(struct ibm_init_struct *iibm)
4090 {
4091 int res;
4092 int status = 0;
4093
4094 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4095 "initializing wan subdriver\n");
4096
4097 TPACPI_ACPIHANDLE_INIT(hkey);
4098
4099 tp_features.wan = hkey_handle &&
4100 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4101
4102 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4103 "wan is %s, status 0x%02x\n",
4104 str_supported(tp_features.wan),
4105 status);
4106
4107 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4108 if (dbg_wwanemul) {
4109 tp_features.wan = 1;
4110 printk(TPACPI_INFO
4111 "wwan switch emulation enabled\n");
4112 } else
4113 #endif
4114 if (tp_features.wan &&
4115 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4116 /* no wan hardware present in system */
4117 tp_features.wan = 0;
4118 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4119 "wan hardware not installed\n");
4120 }
4121
4122 if (!tp_features.wan)
4123 return 1;
4124
4125 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4126 &wan_attr_group);
4127 if (res)
4128 return res;
4129
4130 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4131 &tpacpi_wan_rfkill,
4132 RFKILL_TYPE_WWAN,
4133 TPACPI_RFK_WWAN_SW_NAME,
4134 true,
4135 tpacpi_wan_rfk_set,
4136 tpacpi_wan_rfk_get);
4137 if (res) {
4138 wan_exit();
4139 return res;
4140 }
4141
4142 return 0;
4143 }
4144
4145 /* procfs -------------------------------------------------------------- */
4146 static int wan_read(char *p)
4147 {
4148 int len = 0;
4149 int status = wan_get_radiosw();
4150
4151 tpacpi_disclose_usertask("procfs wan", "read");
4152
4153 if (!tp_features.wan)
4154 len += sprintf(p + len, "status:\t\tnot supported\n");
4155 else {
4156 len += sprintf(p + len, "status:\t\t%s\n",
4157 (status == RFKILL_STATE_UNBLOCKED) ?
4158 "enabled" : "disabled");
4159 len += sprintf(p + len, "commands:\tenable, disable\n");
4160 }
4161
4162 return len;
4163 }
4164
4165 static int wan_write(char *buf)
4166 {
4167 char *cmd;
4168 int state = -1;
4169
4170 if (!tp_features.wan)
4171 return -ENODEV;
4172
4173 while ((cmd = next_cmd(&buf))) {
4174 if (strlencmp(cmd, "enable") == 0) {
4175 state = 1;
4176 } else if (strlencmp(cmd, "disable") == 0) {
4177 state = 0;
4178 } else
4179 return -EINVAL;
4180 }
4181
4182 if (state != -1) {
4183 tpacpi_disclose_usertask("procfs wan",
4184 "attempt to %s\n",
4185 state ? "enable" : "disable");
4186 wan_set_radiosw(state, 1);
4187 }
4188
4189 return 0;
4190 }
4191
4192 static struct ibm_struct wan_driver_data = {
4193 .name = "wan",
4194 .read = wan_read,
4195 .write = wan_write,
4196 .exit = wan_exit,
4197 .suspend = wan_suspend,
4198 .shutdown = wan_shutdown,
4199 };
4200
4201 /*************************************************************************
4202 * UWB subdriver
4203 */
4204
4205 enum {
4206 /* ACPI GUWB/SUWB bits */
4207 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4208 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4209 };
4210
4211 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4212
4213 static struct rfkill *tpacpi_uwb_rfkill;
4214
4215 static int uwb_get_radiosw(void)
4216 {
4217 int status;
4218
4219 if (!tp_features.uwb)
4220 return -ENODEV;
4221
4222 /* WLSW overrides UWB in firmware/hardware, reflect that */
4223 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
4224 return RFKILL_STATE_HARD_BLOCKED;
4225
4226 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4227 if (dbg_uwbemul)
4228 return (tpacpi_uwb_emulstate) ?
4229 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
4230 #endif
4231
4232 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4233 return -EIO;
4234
4235 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4236 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
4237 }
4238
4239 static void uwb_update_rfk(void)
4240 {
4241 int status;
4242
4243 if (!tpacpi_uwb_rfkill)
4244 return;
4245
4246 status = uwb_get_radiosw();
4247 if (status < 0)
4248 return;
4249 rfkill_force_state(tpacpi_uwb_rfkill, status);
4250
4251 vdbg_printk(TPACPI_DBG_RFKILL,
4252 "forced rfkill state to %d\n",
4253 status);
4254 }
4255
4256 static int uwb_set_radiosw(int radio_on, int update_rfk)
4257 {
4258 int status;
4259
4260 if (!tp_features.uwb)
4261 return -ENODEV;
4262
4263 /* WLSW overrides UWB in firmware/hardware, but there is no
4264 * reason to risk weird behaviour. */
4265 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
4266 && radio_on)
4267 return -EPERM;
4268
4269 vdbg_printk(TPACPI_DBG_RFKILL,
4270 "will %s UWB\n", radio_on ? "enable" : "disable");
4271
4272 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4273 if (dbg_uwbemul) {
4274 tpacpi_uwb_emulstate = !!radio_on;
4275 if (update_rfk)
4276 uwb_update_rfk();
4277 return 0;
4278 }
4279 #endif
4280
4281 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
4282 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4283 return -EIO;
4284
4285 if (update_rfk)
4286 uwb_update_rfk();
4287
4288 return 0;
4289 }
4290
4291 /* --------------------------------------------------------------------- */
4292
4293 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
4294 {
4295 int uwbs = uwb_get_radiosw();
4296
4297 if (uwbs < 0)
4298 return uwbs;
4299
4300 *state = uwbs;
4301 return 0;
4302 }
4303
4304 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
4305 {
4306 dbg_printk(TPACPI_DBG_RFKILL,
4307 "request to change radio state to %d\n", state);
4308 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
4309 }
4310
4311 static void uwb_exit(void)
4312 {
4313 if (tpacpi_uwb_rfkill)
4314 rfkill_unregister(tpacpi_uwb_rfkill);
4315 }
4316
4317 static int __init uwb_init(struct ibm_init_struct *iibm)
4318 {
4319 int res;
4320 int status = 0;
4321
4322 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4323 "initializing uwb subdriver\n");
4324
4325 TPACPI_ACPIHANDLE_INIT(hkey);
4326
4327 tp_features.uwb = hkey_handle &&
4328 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4329
4330 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4331 "uwb is %s, status 0x%02x\n",
4332 str_supported(tp_features.uwb),
4333 status);
4334
4335 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4336 if (dbg_uwbemul) {
4337 tp_features.uwb = 1;
4338 printk(TPACPI_INFO
4339 "uwb switch emulation enabled\n");
4340 } else
4341 #endif
4342 if (tp_features.uwb &&
4343 !(status & TP_ACPI_UWB_HWPRESENT)) {
4344 /* no uwb hardware present in system */
4345 tp_features.uwb = 0;
4346 dbg_printk(TPACPI_DBG_INIT,
4347 "uwb hardware not installed\n");
4348 }
4349
4350 if (!tp_features.uwb)
4351 return 1;
4352
4353 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4354 &tpacpi_uwb_rfkill,
4355 RFKILL_TYPE_UWB,
4356 TPACPI_RFK_UWB_SW_NAME,
4357 false,
4358 tpacpi_uwb_rfk_set,
4359 tpacpi_uwb_rfk_get);
4360
4361 return res;
4362 }
4363
4364 static struct ibm_struct uwb_driver_data = {
4365 .name = "uwb",
4366 .exit = uwb_exit,
4367 .flags.experimental = 1,
4368 };
4369
4370 /*************************************************************************
4371 * Video subdriver
4372 */
4373
4374 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4375
4376 enum video_access_mode {
4377 TPACPI_VIDEO_NONE = 0,
4378 TPACPI_VIDEO_570, /* 570 */
4379 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4380 TPACPI_VIDEO_NEW, /* all others */
4381 };
4382
4383 enum { /* video status flags, based on VIDEO_570 */
4384 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4385 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4386 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4387 };
4388
4389 enum { /* TPACPI_VIDEO_570 constants */
4390 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4391 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4392 * video_status_flags */
4393 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4394 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4395 };
4396
4397 static enum video_access_mode video_supported;
4398 static int video_orig_autosw;
4399
4400 static int video_autosw_get(void);
4401 static int video_autosw_set(int enable);
4402
4403 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4404
4405 static int __init video_init(struct ibm_init_struct *iibm)
4406 {
4407 int ivga;
4408
4409 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4410
4411 TPACPI_ACPIHANDLE_INIT(vid);
4412 TPACPI_ACPIHANDLE_INIT(vid2);
4413
4414 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4415 /* G41, assume IVGA doesn't change */
4416 vid_handle = vid2_handle;
4417
4418 if (!vid_handle)
4419 /* video switching not supported on R30, R31 */
4420 video_supported = TPACPI_VIDEO_NONE;
4421 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4422 /* 570 */
4423 video_supported = TPACPI_VIDEO_570;
4424 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4425 /* 600e/x, 770e, 770x */
4426 video_supported = TPACPI_VIDEO_770;
4427 else
4428 /* all others */
4429 video_supported = TPACPI_VIDEO_NEW;
4430
4431 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4432 str_supported(video_supported != TPACPI_VIDEO_NONE),
4433 video_supported);
4434
4435 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4436 }
4437
4438 static void video_exit(void)
4439 {
4440 dbg_printk(TPACPI_DBG_EXIT,
4441 "restoring original video autoswitch mode\n");
4442 if (video_autosw_set(video_orig_autosw))
4443 printk(TPACPI_ERR "error while trying to restore original "
4444 "video autoswitch mode\n");
4445 }
4446
4447 static int video_outputsw_get(void)
4448 {
4449 int status = 0;
4450 int i;
4451
4452 switch (video_supported) {
4453 case TPACPI_VIDEO_570:
4454 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4455 TP_ACPI_VIDEO_570_PHSCMD))
4456 return -EIO;
4457 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4458 break;
4459 case TPACPI_VIDEO_770:
4460 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4461 return -EIO;
4462 if (i)
4463 status |= TP_ACPI_VIDEO_S_LCD;
4464 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4465 return -EIO;
4466 if (i)
4467 status |= TP_ACPI_VIDEO_S_CRT;
4468 break;
4469 case TPACPI_VIDEO_NEW:
4470 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4471 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4472 return -EIO;
4473 if (i)
4474 status |= TP_ACPI_VIDEO_S_CRT;
4475
4476 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4477 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4478 return -EIO;
4479 if (i)
4480 status |= TP_ACPI_VIDEO_S_LCD;
4481 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4482 return -EIO;
4483 if (i)
4484 status |= TP_ACPI_VIDEO_S_DVI;
4485 break;
4486 default:
4487 return -ENOSYS;
4488 }
4489
4490 return status;
4491 }
4492
4493 static int video_outputsw_set(int status)
4494 {
4495 int autosw;
4496 int res = 0;
4497
4498 switch (video_supported) {
4499 case TPACPI_VIDEO_570:
4500 res = acpi_evalf(NULL, NULL,
4501 "\\_SB.PHS2", "vdd",
4502 TP_ACPI_VIDEO_570_PHS2CMD,
4503 status | TP_ACPI_VIDEO_570_PHS2SET);
4504 break;
4505 case TPACPI_VIDEO_770:
4506 autosw = video_autosw_get();
4507 if (autosw < 0)
4508 return autosw;
4509
4510 res = video_autosw_set(1);
4511 if (res)
4512 return res;
4513 res = acpi_evalf(vid_handle, NULL,
4514 "ASWT", "vdd", status * 0x100, 0);
4515 if (!autosw && video_autosw_set(autosw)) {
4516 printk(TPACPI_ERR
4517 "video auto-switch left enabled due to error\n");
4518 return -EIO;
4519 }
4520 break;
4521 case TPACPI_VIDEO_NEW:
4522 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4523 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4524 break;
4525 default:
4526 return -ENOSYS;
4527 }
4528
4529 return (res)? 0 : -EIO;
4530 }
4531
4532 static int video_autosw_get(void)
4533 {
4534 int autosw = 0;
4535
4536 switch (video_supported) {
4537 case TPACPI_VIDEO_570:
4538 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4539 return -EIO;
4540 break;
4541 case TPACPI_VIDEO_770:
4542 case TPACPI_VIDEO_NEW:
4543 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4544 return -EIO;
4545 break;
4546 default:
4547 return -ENOSYS;
4548 }
4549
4550 return autosw & 1;
4551 }
4552
4553 static int video_autosw_set(int enable)
4554 {
4555 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4556 return -EIO;
4557 return 0;
4558 }
4559
4560 static int video_outputsw_cycle(void)
4561 {
4562 int autosw = video_autosw_get();
4563 int res;
4564
4565 if (autosw < 0)
4566 return autosw;
4567
4568 switch (video_supported) {
4569 case TPACPI_VIDEO_570:
4570 res = video_autosw_set(1);
4571 if (res)
4572 return res;
4573 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4574 break;
4575 case TPACPI_VIDEO_770:
4576 case TPACPI_VIDEO_NEW:
4577 res = video_autosw_set(1);
4578 if (res)
4579 return res;
4580 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4581 break;
4582 default:
4583 return -ENOSYS;
4584 }
4585 if (!autosw && video_autosw_set(autosw)) {
4586 printk(TPACPI_ERR
4587 "video auto-switch left enabled due to error\n");
4588 return -EIO;
4589 }
4590
4591 return (res)? 0 : -EIO;
4592 }
4593
4594 static int video_expand_toggle(void)
4595 {
4596 switch (video_supported) {
4597 case TPACPI_VIDEO_570:
4598 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4599 0 : -EIO;
4600 case TPACPI_VIDEO_770:
4601 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4602 0 : -EIO;
4603 case TPACPI_VIDEO_NEW:
4604 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4605 0 : -EIO;
4606 default:
4607 return -ENOSYS;
4608 }
4609 /* not reached */
4610 }
4611
4612 static int video_read(char *p)
4613 {
4614 int status, autosw;
4615 int len = 0;
4616
4617 if (video_supported == TPACPI_VIDEO_NONE) {
4618 len += sprintf(p + len, "status:\t\tnot supported\n");
4619 return len;
4620 }
4621
4622 status = video_outputsw_get();
4623 if (status < 0)
4624 return status;
4625
4626 autosw = video_autosw_get();
4627 if (autosw < 0)
4628 return autosw;
4629
4630 len += sprintf(p + len, "status:\t\tsupported\n");
4631 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4632 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4633 if (video_supported == TPACPI_VIDEO_NEW)
4634 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4635 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4636 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4637 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4638 if (video_supported == TPACPI_VIDEO_NEW)
4639 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4640 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4641 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4642
4643 return len;
4644 }
4645
4646 static int video_write(char *buf)
4647 {
4648 char *cmd;
4649 int enable, disable, status;
4650 int res;
4651
4652 if (video_supported == TPACPI_VIDEO_NONE)
4653 return -ENODEV;
4654
4655 enable = 0;
4656 disable = 0;
4657
4658 while ((cmd = next_cmd(&buf))) {
4659 if (strlencmp(cmd, "lcd_enable") == 0) {
4660 enable |= TP_ACPI_VIDEO_S_LCD;
4661 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4662 disable |= TP_ACPI_VIDEO_S_LCD;
4663 } else if (strlencmp(cmd, "crt_enable") == 0) {
4664 enable |= TP_ACPI_VIDEO_S_CRT;
4665 } else if (strlencmp(cmd, "crt_disable") == 0) {
4666 disable |= TP_ACPI_VIDEO_S_CRT;
4667 } else if (video_supported == TPACPI_VIDEO_NEW &&
4668 strlencmp(cmd, "dvi_enable") == 0) {
4669 enable |= TP_ACPI_VIDEO_S_DVI;
4670 } else if (video_supported == TPACPI_VIDEO_NEW &&
4671 strlencmp(cmd, "dvi_disable") == 0) {
4672 disable |= TP_ACPI_VIDEO_S_DVI;
4673 } else if (strlencmp(cmd, "auto_enable") == 0) {
4674 res = video_autosw_set(1);
4675 if (res)
4676 return res;
4677 } else if (strlencmp(cmd, "auto_disable") == 0) {
4678 res = video_autosw_set(0);
4679 if (res)
4680 return res;
4681 } else if (strlencmp(cmd, "video_switch") == 0) {
4682 res = video_outputsw_cycle();
4683 if (res)
4684 return res;
4685 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4686 res = video_expand_toggle();
4687 if (res)
4688 return res;
4689 } else
4690 return -EINVAL;
4691 }
4692
4693 if (enable || disable) {
4694 status = video_outputsw_get();
4695 if (status < 0)
4696 return status;
4697 res = video_outputsw_set((status & ~disable) | enable);
4698 if (res)
4699 return res;
4700 }
4701
4702 return 0;
4703 }
4704
4705 static struct ibm_struct video_driver_data = {
4706 .name = "video",
4707 .read = video_read,
4708 .write = video_write,
4709 .exit = video_exit,
4710 };
4711
4712 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4713
4714 /*************************************************************************
4715 * Light (thinklight) subdriver
4716 */
4717
4718 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4719 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4720
4721 static int light_get_status(void)
4722 {
4723 int status = 0;
4724
4725 if (tp_features.light_status) {
4726 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4727 return -EIO;
4728 return (!!status);
4729 }
4730
4731 return -ENXIO;
4732 }
4733
4734 static int light_set_status(int status)
4735 {
4736 int rc;
4737
4738 if (tp_features.light) {
4739 if (cmos_handle) {
4740 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4741 (status)?
4742 TP_CMOS_THINKLIGHT_ON :
4743 TP_CMOS_THINKLIGHT_OFF);
4744 } else {
4745 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4746 (status)? 1 : 0);
4747 }
4748 return (rc)? 0 : -EIO;
4749 }
4750
4751 return -ENXIO;
4752 }
4753
4754 static void light_set_status_worker(struct work_struct *work)
4755 {
4756 struct tpacpi_led_classdev *data =
4757 container_of(work, struct tpacpi_led_classdev, work);
4758
4759 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4760 light_set_status((data->new_state != TPACPI_LED_OFF));
4761 }
4762
4763 static void light_sysfs_set(struct led_classdev *led_cdev,
4764 enum led_brightness brightness)
4765 {
4766 struct tpacpi_led_classdev *data =
4767 container_of(led_cdev,
4768 struct tpacpi_led_classdev,
4769 led_classdev);
4770 data->new_state = (brightness != LED_OFF) ?
4771 TPACPI_LED_ON : TPACPI_LED_OFF;
4772 queue_work(tpacpi_wq, &data->work);
4773 }
4774
4775 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4776 {
4777 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4778 }
4779
4780 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4781 .led_classdev = {
4782 .name = "tpacpi::thinklight",
4783 .brightness_set = &light_sysfs_set,
4784 .brightness_get = &light_sysfs_get,
4785 }
4786 };
4787
4788 static int __init light_init(struct ibm_init_struct *iibm)
4789 {
4790 int rc;
4791
4792 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4793
4794 TPACPI_ACPIHANDLE_INIT(ledb);
4795 TPACPI_ACPIHANDLE_INIT(lght);
4796 TPACPI_ACPIHANDLE_INIT(cmos);
4797 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4798
4799 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4800 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4801
4802 if (tp_features.light)
4803 /* light status not supported on
4804 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4805 tp_features.light_status =
4806 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4807
4808 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4809 str_supported(tp_features.light),
4810 str_supported(tp_features.light_status));
4811
4812 if (!tp_features.light)
4813 return 1;
4814
4815 rc = led_classdev_register(&tpacpi_pdev->dev,
4816 &tpacpi_led_thinklight.led_classdev);
4817
4818 if (rc < 0) {
4819 tp_features.light = 0;
4820 tp_features.light_status = 0;
4821 } else {
4822 rc = 0;
4823 }
4824
4825 return rc;
4826 }
4827
4828 static void light_exit(void)
4829 {
4830 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4831 if (work_pending(&tpacpi_led_thinklight.work))
4832 flush_workqueue(tpacpi_wq);
4833 }
4834
4835 static int light_read(char *p)
4836 {
4837 int len = 0;
4838 int status;
4839
4840 if (!tp_features.light) {
4841 len += sprintf(p + len, "status:\t\tnot supported\n");
4842 } else if (!tp_features.light_status) {
4843 len += sprintf(p + len, "status:\t\tunknown\n");
4844 len += sprintf(p + len, "commands:\ton, off\n");
4845 } else {
4846 status = light_get_status();
4847 if (status < 0)
4848 return status;
4849 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4850 len += sprintf(p + len, "commands:\ton, off\n");
4851 }
4852
4853 return len;
4854 }
4855
4856 static int light_write(char *buf)
4857 {
4858 char *cmd;
4859 int newstatus = 0;
4860
4861 if (!tp_features.light)
4862 return -ENODEV;
4863
4864 while ((cmd = next_cmd(&buf))) {
4865 if (strlencmp(cmd, "on") == 0) {
4866 newstatus = 1;
4867 } else if (strlencmp(cmd, "off") == 0) {
4868 newstatus = 0;
4869 } else
4870 return -EINVAL;
4871 }
4872
4873 return light_set_status(newstatus);
4874 }
4875
4876 static struct ibm_struct light_driver_data = {
4877 .name = "light",
4878 .read = light_read,
4879 .write = light_write,
4880 .exit = light_exit,
4881 };
4882
4883 /*************************************************************************
4884 * CMOS subdriver
4885 */
4886
4887 /* sysfs cmos_command -------------------------------------------------- */
4888 static ssize_t cmos_command_store(struct device *dev,
4889 struct device_attribute *attr,
4890 const char *buf, size_t count)
4891 {
4892 unsigned long cmos_cmd;
4893 int res;
4894
4895 if (parse_strtoul(buf, 21, &cmos_cmd))
4896 return -EINVAL;
4897
4898 res = issue_thinkpad_cmos_command(cmos_cmd);
4899 return (res)? res : count;
4900 }
4901
4902 static struct device_attribute dev_attr_cmos_command =
4903 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4904
4905 /* --------------------------------------------------------------------- */
4906
4907 static int __init cmos_init(struct ibm_init_struct *iibm)
4908 {
4909 int res;
4910
4911 vdbg_printk(TPACPI_DBG_INIT,
4912 "initializing cmos commands subdriver\n");
4913
4914 TPACPI_ACPIHANDLE_INIT(cmos);
4915
4916 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4917 str_supported(cmos_handle != NULL));
4918
4919 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4920 if (res)
4921 return res;
4922
4923 return (cmos_handle)? 0 : 1;
4924 }
4925
4926 static void cmos_exit(void)
4927 {
4928 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4929 }
4930
4931 static int cmos_read(char *p)
4932 {
4933 int len = 0;
4934
4935 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4936 R30, R31, T20-22, X20-21 */
4937 if (!cmos_handle)
4938 len += sprintf(p + len, "status:\t\tnot supported\n");
4939 else {
4940 len += sprintf(p + len, "status:\t\tsupported\n");
4941 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4942 }
4943
4944 return len;
4945 }
4946
4947 static int cmos_write(char *buf)
4948 {
4949 char *cmd;
4950 int cmos_cmd, res;
4951
4952 while ((cmd = next_cmd(&buf))) {
4953 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4954 cmos_cmd >= 0 && cmos_cmd <= 21) {
4955 /* cmos_cmd set */
4956 } else
4957 return -EINVAL;
4958
4959 res = issue_thinkpad_cmos_command(cmos_cmd);
4960 if (res)
4961 return res;
4962 }
4963
4964 return 0;
4965 }
4966
4967 static struct ibm_struct cmos_driver_data = {
4968 .name = "cmos",
4969 .read = cmos_read,
4970 .write = cmos_write,
4971 .exit = cmos_exit,
4972 };
4973
4974 /*************************************************************************
4975 * LED subdriver
4976 */
4977
4978 enum led_access_mode {
4979 TPACPI_LED_NONE = 0,
4980 TPACPI_LED_570, /* 570 */
4981 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4982 TPACPI_LED_NEW, /* all others */
4983 };
4984
4985 enum { /* For TPACPI_LED_OLD */
4986 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4987 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4988 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4989 };
4990
4991 static enum led_access_mode led_supported;
4992
4993 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4994 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4995 /* T20-22, X20-21 */
4996 "LED", /* all others */
4997 ); /* R30, R31 */
4998
4999 #define TPACPI_LED_NUMLEDS 16
5000 static struct tpacpi_led_classdev *tpacpi_leds;
5001 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5002 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5003 /* there's a limit of 19 chars + NULL before 2.6.26 */
5004 "tpacpi::power",
5005 "tpacpi:orange:batt",
5006 "tpacpi:green:batt",
5007 "tpacpi::dock_active",
5008 "tpacpi::bay_active",
5009 "tpacpi::dock_batt",
5010 "tpacpi::unknown_led",
5011 "tpacpi::standby",
5012 "tpacpi::dock_status1",
5013 "tpacpi::dock_status2",
5014 "tpacpi::unknown_led2",
5015 "tpacpi::unknown_led3",
5016 "tpacpi::thinkvantage",
5017 };
5018 #define TPACPI_SAFE_LEDS 0x1081U
5019
5020 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5021 {
5022 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5023 return false;
5024 #else
5025 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5026 #endif
5027 }
5028
5029 static int led_get_status(const unsigned int led)
5030 {
5031 int status;
5032 enum led_status_t led_s;
5033
5034 switch (led_supported) {
5035 case TPACPI_LED_570:
5036 if (!acpi_evalf(ec_handle,
5037 &status, "GLED", "dd", 1 << led))
5038 return -EIO;
5039 led_s = (status == 0)?
5040 TPACPI_LED_OFF :
5041 ((status == 1)?
5042 TPACPI_LED_ON :
5043 TPACPI_LED_BLINK);
5044 tpacpi_led_state_cache[led] = led_s;
5045 return led_s;
5046 default:
5047 return -ENXIO;
5048 }
5049
5050 /* not reached */
5051 }
5052
5053 static int led_set_status(const unsigned int led,
5054 const enum led_status_t ledstatus)
5055 {
5056 /* off, on, blink. Index is led_status_t */
5057 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5058 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5059
5060 int rc = 0;
5061
5062 switch (led_supported) {
5063 case TPACPI_LED_570:
5064 /* 570 */
5065 if (unlikely(led > 7))
5066 return -EINVAL;
5067 if (unlikely(tpacpi_is_led_restricted(led)))
5068 return -EPERM;
5069 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5070 (1 << led), led_sled_arg1[ledstatus]))
5071 rc = -EIO;
5072 break;
5073 case TPACPI_LED_OLD:
5074 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5075 if (unlikely(led > 7))
5076 return -EINVAL;
5077 if (unlikely(tpacpi_is_led_restricted(led)))
5078 return -EPERM;
5079 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5080 if (rc >= 0)
5081 rc = ec_write(TPACPI_LED_EC_HLBL,
5082 (ledstatus == TPACPI_LED_BLINK) << led);
5083 if (rc >= 0)
5084 rc = ec_write(TPACPI_LED_EC_HLCL,
5085 (ledstatus != TPACPI_LED_OFF) << led);
5086 break;
5087 case TPACPI_LED_NEW:
5088 /* all others */
5089 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5090 return -EINVAL;
5091 if (unlikely(tpacpi_is_led_restricted(led)))
5092 return -EPERM;
5093 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5094 led, led_led_arg1[ledstatus]))
5095 rc = -EIO;
5096 break;
5097 default:
5098 rc = -ENXIO;
5099 }
5100
5101 if (!rc)
5102 tpacpi_led_state_cache[led] = ledstatus;
5103
5104 return rc;
5105 }
5106
5107 static void led_set_status_worker(struct work_struct *work)
5108 {
5109 struct tpacpi_led_classdev *data =
5110 container_of(work, struct tpacpi_led_classdev, work);
5111
5112 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5113 led_set_status(data->led, data->new_state);
5114 }
5115
5116 static void led_sysfs_set(struct led_classdev *led_cdev,
5117 enum led_brightness brightness)
5118 {
5119 struct tpacpi_led_classdev *data = container_of(led_cdev,
5120 struct tpacpi_led_classdev, led_classdev);
5121
5122 if (brightness == LED_OFF)
5123 data->new_state = TPACPI_LED_OFF;
5124 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5125 data->new_state = TPACPI_LED_ON;
5126 else
5127 data->new_state = TPACPI_LED_BLINK;
5128
5129 queue_work(tpacpi_wq, &data->work);
5130 }
5131
5132 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5133 unsigned long *delay_on, unsigned long *delay_off)
5134 {
5135 struct tpacpi_led_classdev *data = container_of(led_cdev,
5136 struct tpacpi_led_classdev, led_classdev);
5137
5138 /* Can we choose the flash rate? */
5139 if (*delay_on == 0 && *delay_off == 0) {
5140 /* yes. set them to the hardware blink rate (1 Hz) */
5141 *delay_on = 500; /* ms */
5142 *delay_off = 500; /* ms */
5143 } else if ((*delay_on != 500) || (*delay_off != 500))
5144 return -EINVAL;
5145
5146 data->new_state = TPACPI_LED_BLINK;
5147 queue_work(tpacpi_wq, &data->work);
5148
5149 return 0;
5150 }
5151
5152 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5153 {
5154 int rc;
5155
5156 struct tpacpi_led_classdev *data = container_of(led_cdev,
5157 struct tpacpi_led_classdev, led_classdev);
5158
5159 rc = led_get_status(data->led);
5160
5161 if (rc == TPACPI_LED_OFF || rc < 0)
5162 rc = LED_OFF; /* no error handling in led class :( */
5163 else
5164 rc = LED_FULL;
5165
5166 return rc;
5167 }
5168
5169 static void led_exit(void)
5170 {
5171 unsigned int i;
5172
5173 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5174 if (tpacpi_leds[i].led_classdev.name)
5175 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5176 }
5177
5178 kfree(tpacpi_leds);
5179 }
5180
5181 static int __init tpacpi_init_led(unsigned int led)
5182 {
5183 int rc;
5184
5185 tpacpi_leds[led].led = led;
5186
5187 /* LEDs with no name don't get registered */
5188 if (!tpacpi_led_names[led])
5189 return 0;
5190
5191 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5192 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5193 if (led_supported == TPACPI_LED_570)
5194 tpacpi_leds[led].led_classdev.brightness_get =
5195 &led_sysfs_get;
5196
5197 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5198
5199 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5200
5201 rc = led_classdev_register(&tpacpi_pdev->dev,
5202 &tpacpi_leds[led].led_classdev);
5203 if (rc < 0)
5204 tpacpi_leds[led].led_classdev.name = NULL;
5205
5206 return rc;
5207 }
5208
5209 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5210 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5211 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5212 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5213
5214 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5215 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5216 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5217 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5218 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5219 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5220 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5221 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5222
5223 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5224 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5225 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5226 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5227 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5228
5229 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5230 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5231 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5232 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5233
5234 /* (1) - may have excess leds enabled on MSB */
5235
5236 /* Defaults (order matters, keep last, don't reorder!) */
5237 { /* Lenovo */
5238 .vendor = PCI_VENDOR_ID_LENOVO,
5239 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5240 .quirks = 0x1fffU,
5241 },
5242 { /* IBM ThinkPads with no EC version string */
5243 .vendor = PCI_VENDOR_ID_IBM,
5244 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5245 .quirks = 0x00ffU,
5246 },
5247 { /* IBM ThinkPads with EC version string */
5248 .vendor = PCI_VENDOR_ID_IBM,
5249 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5250 .quirks = 0x00bfU,
5251 },
5252 };
5253
5254 #undef TPACPI_LEDQ_IBM
5255 #undef TPACPI_LEDQ_LNV
5256
5257 static int __init led_init(struct ibm_init_struct *iibm)
5258 {
5259 unsigned int i;
5260 int rc;
5261 unsigned long useful_leds;
5262
5263 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5264
5265 TPACPI_ACPIHANDLE_INIT(led);
5266
5267 if (!led_handle)
5268 /* led not supported on R30, R31 */
5269 led_supported = TPACPI_LED_NONE;
5270 else if (strlencmp(led_path, "SLED") == 0)
5271 /* 570 */
5272 led_supported = TPACPI_LED_570;
5273 else if (strlencmp(led_path, "SYSL") == 0)
5274 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5275 led_supported = TPACPI_LED_OLD;
5276 else
5277 /* all others */
5278 led_supported = TPACPI_LED_NEW;
5279
5280 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5281 str_supported(led_supported), led_supported);
5282
5283 if (led_supported == TPACPI_LED_NONE)
5284 return 1;
5285
5286 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5287 GFP_KERNEL);
5288 if (!tpacpi_leds) {
5289 printk(TPACPI_ERR "Out of memory for LED data\n");
5290 return -ENOMEM;
5291 }
5292
5293 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5294 ARRAY_SIZE(led_useful_qtable));
5295
5296 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5297 if (!tpacpi_is_led_restricted(i) &&
5298 test_bit(i, &useful_leds)) {
5299 rc = tpacpi_init_led(i);
5300 if (rc < 0) {
5301 led_exit();
5302 return rc;
5303 }
5304 }
5305 }
5306
5307 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5308 printk(TPACPI_NOTICE
5309 "warning: userspace override of important "
5310 "firmware LEDs is enabled\n");
5311 #endif
5312 return 0;
5313 }
5314
5315 #define str_led_status(s) \
5316 ((s) == TPACPI_LED_OFF ? "off" : \
5317 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5318
5319 static int led_read(char *p)
5320 {
5321 int len = 0;
5322
5323 if (!led_supported) {
5324 len += sprintf(p + len, "status:\t\tnot supported\n");
5325 return len;
5326 }
5327 len += sprintf(p + len, "status:\t\tsupported\n");
5328
5329 if (led_supported == TPACPI_LED_570) {
5330 /* 570 */
5331 int i, status;
5332 for (i = 0; i < 8; i++) {
5333 status = led_get_status(i);
5334 if (status < 0)
5335 return -EIO;
5336 len += sprintf(p + len, "%d:\t\t%s\n",
5337 i, str_led_status(status));
5338 }
5339 }
5340
5341 len += sprintf(p + len, "commands:\t"
5342 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5343
5344 return len;
5345 }
5346
5347 static int led_write(char *buf)
5348 {
5349 char *cmd;
5350 int led, rc;
5351 enum led_status_t s;
5352
5353 if (!led_supported)
5354 return -ENODEV;
5355
5356 while ((cmd = next_cmd(&buf))) {
5357 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5358 return -EINVAL;
5359
5360 if (strstr(cmd, "off")) {
5361 s = TPACPI_LED_OFF;
5362 } else if (strstr(cmd, "on")) {
5363 s = TPACPI_LED_ON;
5364 } else if (strstr(cmd, "blink")) {
5365 s = TPACPI_LED_BLINK;
5366 } else {
5367 return -EINVAL;
5368 }
5369
5370 rc = led_set_status(led, s);
5371 if (rc < 0)
5372 return rc;
5373 }
5374
5375 return 0;
5376 }
5377
5378 static struct ibm_struct led_driver_data = {
5379 .name = "led",
5380 .read = led_read,
5381 .write = led_write,
5382 .exit = led_exit,
5383 };
5384
5385 /*************************************************************************
5386 * Beep subdriver
5387 */
5388
5389 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5390
5391 #define TPACPI_BEEP_Q1 0x0001
5392
5393 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5394 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5395 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5396 };
5397
5398 static int __init beep_init(struct ibm_init_struct *iibm)
5399 {
5400 unsigned long quirks;
5401
5402 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5403
5404 TPACPI_ACPIHANDLE_INIT(beep);
5405
5406 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5407 str_supported(beep_handle != NULL));
5408
5409 quirks = tpacpi_check_quirks(beep_quirk_table,
5410 ARRAY_SIZE(beep_quirk_table));
5411
5412 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5413
5414 return (beep_handle)? 0 : 1;
5415 }
5416
5417 static int beep_read(char *p)
5418 {
5419 int len = 0;
5420
5421 if (!beep_handle)
5422 len += sprintf(p + len, "status:\t\tnot supported\n");
5423 else {
5424 len += sprintf(p + len, "status:\t\tsupported\n");
5425 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5426 }
5427
5428 return len;
5429 }
5430
5431 static int beep_write(char *buf)
5432 {
5433 char *cmd;
5434 int beep_cmd;
5435
5436 if (!beep_handle)
5437 return -ENODEV;
5438
5439 while ((cmd = next_cmd(&buf))) {
5440 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5441 beep_cmd >= 0 && beep_cmd <= 17) {
5442 /* beep_cmd set */
5443 } else
5444 return -EINVAL;
5445 if (tp_features.beep_needs_two_args) {
5446 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5447 beep_cmd, 0))
5448 return -EIO;
5449 } else {
5450 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5451 beep_cmd))
5452 return -EIO;
5453 }
5454 }
5455
5456 return 0;
5457 }
5458
5459 static struct ibm_struct beep_driver_data = {
5460 .name = "beep",
5461 .read = beep_read,
5462 .write = beep_write,
5463 };
5464
5465 /*************************************************************************
5466 * Thermal subdriver
5467 */
5468
5469 enum thermal_access_mode {
5470 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5471 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5472 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5473 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5474 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5475 };
5476
5477 enum { /* TPACPI_THERMAL_TPEC_* */
5478 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5479 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5480 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5481
5482 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5483 };
5484
5485
5486 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5487 struct ibm_thermal_sensors_struct {
5488 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5489 };
5490
5491 static enum thermal_access_mode thermal_read_mode;
5492
5493 /* idx is zero-based */
5494 static int thermal_get_sensor(int idx, s32 *value)
5495 {
5496 int t;
5497 s8 tmp;
5498 char tmpi[5];
5499
5500 t = TP_EC_THERMAL_TMP0;
5501
5502 switch (thermal_read_mode) {
5503 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5504 case TPACPI_THERMAL_TPEC_16:
5505 if (idx >= 8 && idx <= 15) {
5506 t = TP_EC_THERMAL_TMP8;
5507 idx -= 8;
5508 }
5509 /* fallthrough */
5510 #endif
5511 case TPACPI_THERMAL_TPEC_8:
5512 if (idx <= 7) {
5513 if (!acpi_ec_read(t + idx, &tmp))
5514 return -EIO;
5515 *value = tmp * 1000;
5516 return 0;
5517 }
5518 break;
5519
5520 case TPACPI_THERMAL_ACPI_UPDT:
5521 if (idx <= 7) {
5522 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5523 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5524 return -EIO;
5525 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5526 return -EIO;
5527 *value = (t - 2732) * 100;
5528 return 0;
5529 }
5530 break;
5531
5532 case TPACPI_THERMAL_ACPI_TMP07:
5533 if (idx <= 7) {
5534 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5535 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5536 return -EIO;
5537 if (t > 127 || t < -127)
5538 t = TP_EC_THERMAL_TMP_NA;
5539 *value = t * 1000;
5540 return 0;
5541 }
5542 break;
5543
5544 case TPACPI_THERMAL_NONE:
5545 default:
5546 return -ENOSYS;
5547 }
5548
5549 return -EINVAL;
5550 }
5551
5552 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5553 {
5554 int res, i;
5555 int n;
5556
5557 n = 8;
5558 i = 0;
5559
5560 if (!s)
5561 return -EINVAL;
5562
5563 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5564 n = 16;
5565
5566 for (i = 0 ; i < n; i++) {
5567 res = thermal_get_sensor(i, &s->temp[i]);
5568 if (res)
5569 return res;
5570 }
5571
5572 return n;
5573 }
5574
5575 static void thermal_dump_all_sensors(void)
5576 {
5577 int n, i;
5578 struct ibm_thermal_sensors_struct t;
5579
5580 n = thermal_get_sensors(&t);
5581 if (n <= 0)
5582 return;
5583
5584 printk(TPACPI_NOTICE
5585 "temperatures (Celsius):");
5586
5587 for (i = 0; i < n; i++) {
5588 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5589 printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5590 else
5591 printk(KERN_CONT " N/A");
5592 }
5593
5594 printk(KERN_CONT "\n");
5595 }
5596
5597 /* sysfs temp##_input -------------------------------------------------- */
5598
5599 static ssize_t thermal_temp_input_show(struct device *dev,
5600 struct device_attribute *attr,
5601 char *buf)
5602 {
5603 struct sensor_device_attribute *sensor_attr =
5604 to_sensor_dev_attr(attr);
5605 int idx = sensor_attr->index;
5606 s32 value;
5607 int res;
5608
5609 res = thermal_get_sensor(idx, &value);
5610 if (res)
5611 return res;
5612 if (value == TPACPI_THERMAL_SENSOR_NA)
5613 return -ENXIO;
5614
5615 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5616 }
5617
5618 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5619 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5620 thermal_temp_input_show, NULL, _idxB)
5621
5622 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5623 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5624 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5625 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5626 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5627 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5628 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5629 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5630 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5631 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5632 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5633 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5634 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5635 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5636 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5637 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5638 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5639 };
5640
5641 #define THERMAL_ATTRS(X) \
5642 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5643
5644 static struct attribute *thermal_temp_input_attr[] = {
5645 THERMAL_ATTRS(8),
5646 THERMAL_ATTRS(9),
5647 THERMAL_ATTRS(10),
5648 THERMAL_ATTRS(11),
5649 THERMAL_ATTRS(12),
5650 THERMAL_ATTRS(13),
5651 THERMAL_ATTRS(14),
5652 THERMAL_ATTRS(15),
5653 THERMAL_ATTRS(0),
5654 THERMAL_ATTRS(1),
5655 THERMAL_ATTRS(2),
5656 THERMAL_ATTRS(3),
5657 THERMAL_ATTRS(4),
5658 THERMAL_ATTRS(5),
5659 THERMAL_ATTRS(6),
5660 THERMAL_ATTRS(7),
5661 NULL
5662 };
5663
5664 static const struct attribute_group thermal_temp_input16_group = {
5665 .attrs = thermal_temp_input_attr
5666 };
5667
5668 static const struct attribute_group thermal_temp_input8_group = {
5669 .attrs = &thermal_temp_input_attr[8]
5670 };
5671
5672 #undef THERMAL_SENSOR_ATTR_TEMP
5673 #undef THERMAL_ATTRS
5674
5675 /* --------------------------------------------------------------------- */
5676
5677 static int __init thermal_init(struct ibm_init_struct *iibm)
5678 {
5679 u8 t, ta1, ta2;
5680 int i;
5681 int acpi_tmp7;
5682 int res;
5683
5684 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5685
5686 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5687
5688 if (thinkpad_id.ec_model) {
5689 /*
5690 * Direct EC access mode: sensors at registers
5691 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5692 * non-implemented, thermal sensors return 0x80 when
5693 * not available
5694 */
5695
5696 ta1 = ta2 = 0;
5697 for (i = 0; i < 8; i++) {
5698 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5699 ta1 |= t;
5700 } else {
5701 ta1 = 0;
5702 break;
5703 }
5704 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5705 ta2 |= t;
5706 } else {
5707 ta1 = 0;
5708 break;
5709 }
5710 }
5711 if (ta1 == 0) {
5712 /* This is sheer paranoia, but we handle it anyway */
5713 if (acpi_tmp7) {
5714 printk(TPACPI_ERR
5715 "ThinkPad ACPI EC access misbehaving, "
5716 "falling back to ACPI TMPx access "
5717 "mode\n");
5718 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5719 } else {
5720 printk(TPACPI_ERR
5721 "ThinkPad ACPI EC access misbehaving, "
5722 "disabling thermal sensors access\n");
5723 thermal_read_mode = TPACPI_THERMAL_NONE;
5724 }
5725 } else {
5726 thermal_read_mode =
5727 (ta2 != 0) ?
5728 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5729 }
5730 } else if (acpi_tmp7) {
5731 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5732 /* 600e/x, 770e, 770x */
5733 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5734 } else {
5735 /* Standard ACPI TMPx access, max 8 sensors */
5736 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5737 }
5738 } else {
5739 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5740 thermal_read_mode = TPACPI_THERMAL_NONE;
5741 }
5742
5743 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5744 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5745 thermal_read_mode);
5746
5747 switch (thermal_read_mode) {
5748 case TPACPI_THERMAL_TPEC_16:
5749 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5750 &thermal_temp_input16_group);
5751 if (res)
5752 return res;
5753 break;
5754 case TPACPI_THERMAL_TPEC_8:
5755 case TPACPI_THERMAL_ACPI_TMP07:
5756 case TPACPI_THERMAL_ACPI_UPDT:
5757 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5758 &thermal_temp_input8_group);
5759 if (res)
5760 return res;
5761 break;
5762 case TPACPI_THERMAL_NONE:
5763 default:
5764 return 1;
5765 }
5766
5767 return 0;
5768 }
5769
5770 static void thermal_exit(void)
5771 {
5772 switch (thermal_read_mode) {
5773 case TPACPI_THERMAL_TPEC_16:
5774 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5775 &thermal_temp_input16_group);
5776 break;
5777 case TPACPI_THERMAL_TPEC_8:
5778 case TPACPI_THERMAL_ACPI_TMP07:
5779 case TPACPI_THERMAL_ACPI_UPDT:
5780 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5781 &thermal_temp_input16_group);
5782 break;
5783 case TPACPI_THERMAL_NONE:
5784 default:
5785 break;
5786 }
5787 }
5788
5789 static int thermal_read(char *p)
5790 {
5791 int len = 0;
5792 int n, i;
5793 struct ibm_thermal_sensors_struct t;
5794
5795 n = thermal_get_sensors(&t);
5796 if (unlikely(n < 0))
5797 return n;
5798
5799 len += sprintf(p + len, "temperatures:\t");
5800
5801 if (n > 0) {
5802 for (i = 0; i < (n - 1); i++)
5803 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5804 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5805 } else
5806 len += sprintf(p + len, "not supported\n");
5807
5808 return len;
5809 }
5810
5811 static struct ibm_struct thermal_driver_data = {
5812 .name = "thermal",
5813 .read = thermal_read,
5814 .exit = thermal_exit,
5815 };
5816
5817 /*************************************************************************
5818 * EC Dump subdriver
5819 */
5820
5821 static u8 ecdump_regs[256];
5822
5823 static int ecdump_read(char *p)
5824 {
5825 int len = 0;
5826 int i, j;
5827 u8 v;
5828
5829 len += sprintf(p + len, "EC "
5830 " +00 +01 +02 +03 +04 +05 +06 +07"
5831 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5832 for (i = 0; i < 256; i += 16) {
5833 len += sprintf(p + len, "EC 0x%02x:", i);
5834 for (j = 0; j < 16; j++) {
5835 if (!acpi_ec_read(i + j, &v))
5836 break;
5837 if (v != ecdump_regs[i + j])
5838 len += sprintf(p + len, " *%02x", v);
5839 else
5840 len += sprintf(p + len, " %02x", v);
5841 ecdump_regs[i + j] = v;
5842 }
5843 len += sprintf(p + len, "\n");
5844 if (j != 16)
5845 break;
5846 }
5847
5848 /* These are way too dangerous to advertise openly... */
5849 #if 0
5850 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5851 " (<offset> is 00-ff, <value> is 00-ff)\n");
5852 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5853 " (<offset> is 00-ff, <value> is 0-255)\n");
5854 #endif
5855 return len;
5856 }
5857
5858 static int ecdump_write(char *buf)
5859 {
5860 char *cmd;
5861 int i, v;
5862
5863 while ((cmd = next_cmd(&buf))) {
5864 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5865 /* i and v set */
5866 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5867 /* i and v set */
5868 } else
5869 return -EINVAL;
5870 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5871 if (!acpi_ec_write(i, v))
5872 return -EIO;
5873 } else
5874 return -EINVAL;
5875 }
5876
5877 return 0;
5878 }
5879
5880 static struct ibm_struct ecdump_driver_data = {
5881 .name = "ecdump",
5882 .read = ecdump_read,
5883 .write = ecdump_write,
5884 .flags.experimental = 1,
5885 };
5886
5887 /*************************************************************************
5888 * Backlight/brightness subdriver
5889 */
5890
5891 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5892
5893 /*
5894 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5895 * CMOS NVRAM byte 0x5E, bits 0-3.
5896 *
5897 * EC HBRV (0x31) has the following layout
5898 * Bit 7: unknown function
5899 * Bit 6: unknown function
5900 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5901 * Bit 4: must be set to zero to avoid problems
5902 * Bit 3-0: backlight brightness level
5903 *
5904 * brightness_get_raw returns status data in the HBRV layout
5905 *
5906 * WARNING: The X61 has been verified to use HBRV for something else, so
5907 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5908 * testing on the very early *60 Lenovo models...
5909 */
5910
5911 enum {
5912 TP_EC_BACKLIGHT = 0x31,
5913
5914 /* TP_EC_BACKLIGHT bitmasks */
5915 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5916 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5917 TP_EC_BACKLIGHT_MAPSW = 0x20,
5918 };
5919
5920 enum tpacpi_brightness_access_mode {
5921 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5922 TPACPI_BRGHT_MODE_EC, /* EC control */
5923 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5924 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5925 TPACPI_BRGHT_MODE_MAX
5926 };
5927
5928 static struct backlight_device *ibm_backlight_device;
5929
5930 static enum tpacpi_brightness_access_mode brightness_mode =
5931 TPACPI_BRGHT_MODE_MAX;
5932
5933 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5934
5935 static struct mutex brightness_mutex;
5936
5937 /* NVRAM brightness access,
5938 * call with brightness_mutex held! */
5939 static unsigned int tpacpi_brightness_nvram_get(void)
5940 {
5941 u8 lnvram;
5942
5943 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5944 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5945 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5946 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5947
5948 return lnvram;
5949 }
5950
5951 static void tpacpi_brightness_checkpoint_nvram(void)
5952 {
5953 u8 lec = 0;
5954 u8 b_nvram;
5955
5956 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5957 return;
5958
5959 vdbg_printk(TPACPI_DBG_BRGHT,
5960 "trying to checkpoint backlight level to NVRAM...\n");
5961
5962 if (mutex_lock_killable(&brightness_mutex) < 0)
5963 return;
5964
5965 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5966 goto unlock;
5967 lec &= TP_EC_BACKLIGHT_LVLMSK;
5968 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5969
5970 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5971 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5972 /* NVRAM needs update */
5973 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5974 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5975 b_nvram |= lec;
5976 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5977 dbg_printk(TPACPI_DBG_BRGHT,
5978 "updated NVRAM backlight level to %u (0x%02x)\n",
5979 (unsigned int) lec, (unsigned int) b_nvram);
5980 } else
5981 vdbg_printk(TPACPI_DBG_BRGHT,
5982 "NVRAM backlight level already is %u (0x%02x)\n",
5983 (unsigned int) lec, (unsigned int) b_nvram);
5984
5985 unlock:
5986 mutex_unlock(&brightness_mutex);
5987 }
5988
5989
5990 /* call with brightness_mutex held! */
5991 static int tpacpi_brightness_get_raw(int *status)
5992 {
5993 u8 lec = 0;
5994
5995 switch (brightness_mode) {
5996 case TPACPI_BRGHT_MODE_UCMS_STEP:
5997 *status = tpacpi_brightness_nvram_get();
5998 return 0;
5999 case TPACPI_BRGHT_MODE_EC:
6000 case TPACPI_BRGHT_MODE_ECNVRAM:
6001 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6002 return -EIO;
6003 *status = lec;
6004 return 0;
6005 default:
6006 return -ENXIO;
6007 }
6008 }
6009
6010 /* call with brightness_mutex held! */
6011 /* do NOT call with illegal backlight level value */
6012 static int tpacpi_brightness_set_ec(unsigned int value)
6013 {
6014 u8 lec = 0;
6015
6016 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6017 return -EIO;
6018
6019 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6020 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6021 (value & TP_EC_BACKLIGHT_LVLMSK))))
6022 return -EIO;
6023
6024 return 0;
6025 }
6026
6027 /* call with brightness_mutex held! */
6028 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6029 {
6030 int cmos_cmd, inc;
6031 unsigned int current_value, i;
6032
6033 current_value = tpacpi_brightness_nvram_get();
6034
6035 if (value == current_value)
6036 return 0;
6037
6038 cmos_cmd = (value > current_value) ?
6039 TP_CMOS_BRIGHTNESS_UP :
6040 TP_CMOS_BRIGHTNESS_DOWN;
6041 inc = (value > current_value) ? 1 : -1;
6042
6043 for (i = current_value; i != value; i += inc)
6044 if (issue_thinkpad_cmos_command(cmos_cmd))
6045 return -EIO;
6046
6047 return 0;
6048 }
6049
6050 /* May return EINTR which can always be mapped to ERESTARTSYS */
6051 static int brightness_set(unsigned int value)
6052 {
6053 int res;
6054
6055 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6056 value < 0)
6057 return -EINVAL;
6058
6059 vdbg_printk(TPACPI_DBG_BRGHT,
6060 "set backlight level to %d\n", value);
6061
6062 res = mutex_lock_killable(&brightness_mutex);
6063 if (res < 0)
6064 return res;
6065
6066 switch (brightness_mode) {
6067 case TPACPI_BRGHT_MODE_EC:
6068 case TPACPI_BRGHT_MODE_ECNVRAM:
6069 res = tpacpi_brightness_set_ec(value);
6070 break;
6071 case TPACPI_BRGHT_MODE_UCMS_STEP:
6072 res = tpacpi_brightness_set_ucmsstep(value);
6073 break;
6074 default:
6075 res = -ENXIO;
6076 }
6077
6078 mutex_unlock(&brightness_mutex);
6079 return res;
6080 }
6081
6082 /* sysfs backlight class ----------------------------------------------- */
6083
6084 static int brightness_update_status(struct backlight_device *bd)
6085 {
6086 unsigned int level =
6087 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6088 bd->props.power == FB_BLANK_UNBLANK) ?
6089 bd->props.brightness : 0;
6090
6091 dbg_printk(TPACPI_DBG_BRGHT,
6092 "backlight: attempt to set level to %d\n",
6093 level);
6094
6095 /* it is the backlight class's job (caller) to handle
6096 * EINTR and other errors properly */
6097 return brightness_set(level);
6098 }
6099
6100 static int brightness_get(struct backlight_device *bd)
6101 {
6102 int status, res;
6103
6104 res = mutex_lock_killable(&brightness_mutex);
6105 if (res < 0)
6106 return 0;
6107
6108 res = tpacpi_brightness_get_raw(&status);
6109
6110 mutex_unlock(&brightness_mutex);
6111
6112 if (res < 0)
6113 return 0;
6114
6115 return status & TP_EC_BACKLIGHT_LVLMSK;
6116 }
6117
6118 static void tpacpi_brightness_notify_change(void)
6119 {
6120 backlight_force_update(ibm_backlight_device,
6121 BACKLIGHT_UPDATE_HOTKEY);
6122 }
6123
6124 static struct backlight_ops ibm_backlight_data = {
6125 .get_brightness = brightness_get,
6126 .update_status = brightness_update_status,
6127 };
6128
6129 /* --------------------------------------------------------------------- */
6130
6131 /*
6132 * These are only useful for models that have only one possibility
6133 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6134 * these quirks.
6135 */
6136 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6137 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6138 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6139
6140 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6141 /* Models with ATI GPUs known to require ECNVRAM mode */
6142 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6143
6144 /* Models with ATI GPUs that can use ECNVRAM */
6145 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6146 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6147 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6148 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6149
6150 /* Models with Intel Extreme Graphics 2 */
6151 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6152 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6153 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6154
6155 /* Models with Intel GMA900 */
6156 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6157 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6158 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6159 };
6160
6161 static int __init brightness_init(struct ibm_init_struct *iibm)
6162 {
6163 int b;
6164 unsigned long quirks;
6165
6166 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6167
6168 mutex_init(&brightness_mutex);
6169
6170 quirks = tpacpi_check_quirks(brightness_quirk_table,
6171 ARRAY_SIZE(brightness_quirk_table));
6172
6173 /*
6174 * We always attempt to detect acpi support, so as to switch
6175 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6176 * going to publish a backlight interface
6177 */
6178 b = tpacpi_check_std_acpi_brightness_support();
6179 if (b > 0) {
6180
6181 if (acpi_video_backlight_support()) {
6182 if (brightness_enable > 1) {
6183 printk(TPACPI_NOTICE
6184 "Standard ACPI backlight interface "
6185 "available, not loading native one.\n");
6186 return 1;
6187 } else if (brightness_enable == 1) {
6188 printk(TPACPI_NOTICE
6189 "Backlight control force enabled, even if standard "
6190 "ACPI backlight interface is available\n");
6191 }
6192 } else {
6193 if (brightness_enable > 1) {
6194 printk(TPACPI_NOTICE
6195 "Standard ACPI backlight interface not "
6196 "available, thinkpad_acpi native "
6197 "brightness control enabled\n");
6198 }
6199 }
6200 }
6201
6202 if (!brightness_enable) {
6203 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6204 "brightness support disabled by "
6205 "module parameter\n");
6206 return 1;
6207 }
6208
6209 if (b > 16) {
6210 printk(TPACPI_ERR
6211 "Unsupported brightness interface, "
6212 "please contact %s\n", TPACPI_MAIL);
6213 return 1;
6214 }
6215 if (b == 16)
6216 tp_features.bright_16levels = 1;
6217
6218 /*
6219 * Check for module parameter bogosity, note that we
6220 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6221 * able to detect "unspecified"
6222 */
6223 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6224 return -EINVAL;
6225
6226 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6227 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6228 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6229 if (quirks & TPACPI_BRGHT_Q_EC)
6230 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6231 else
6232 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6233
6234 dbg_printk(TPACPI_DBG_BRGHT,
6235 "driver auto-selected brightness_mode=%d\n",
6236 brightness_mode);
6237 }
6238
6239 /* Safety */
6240 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6241 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6242 brightness_mode == TPACPI_BRGHT_MODE_EC))
6243 return -EINVAL;
6244
6245 if (tpacpi_brightness_get_raw(&b) < 0)
6246 return 1;
6247
6248 if (tp_features.bright_16levels)
6249 printk(TPACPI_INFO
6250 "detected a 16-level brightness capable ThinkPad\n");
6251
6252 ibm_backlight_device = backlight_device_register(
6253 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6254 &ibm_backlight_data);
6255 if (IS_ERR(ibm_backlight_device)) {
6256 int rc = PTR_ERR(ibm_backlight_device);
6257 ibm_backlight_device = NULL;
6258 printk(TPACPI_ERR "Could not register backlight device\n");
6259 return rc;
6260 }
6261 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6262 "brightness is supported\n");
6263
6264 if (quirks & TPACPI_BRGHT_Q_ASK) {
6265 printk(TPACPI_NOTICE
6266 "brightness: will use unverified default: "
6267 "brightness_mode=%d\n", brightness_mode);
6268 printk(TPACPI_NOTICE
6269 "brightness: please report to %s whether it works well "
6270 "or not on your ThinkPad\n", TPACPI_MAIL);
6271 }
6272
6273 ibm_backlight_device->props.max_brightness =
6274 (tp_features.bright_16levels)? 15 : 7;
6275 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6276 backlight_update_status(ibm_backlight_device);
6277
6278 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6279 "brightness: registering brightness hotkeys "
6280 "as change notification\n");
6281 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6282 | TP_ACPI_HKEY_BRGHTUP_MASK
6283 | TP_ACPI_HKEY_BRGHTDWN_MASK);;
6284 return 0;
6285 }
6286
6287 static void brightness_suspend(pm_message_t state)
6288 {
6289 tpacpi_brightness_checkpoint_nvram();
6290 }
6291
6292 static void brightness_shutdown(void)
6293 {
6294 tpacpi_brightness_checkpoint_nvram();
6295 }
6296
6297 static void brightness_exit(void)
6298 {
6299 if (ibm_backlight_device) {
6300 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6301 "calling backlight_device_unregister()\n");
6302 backlight_device_unregister(ibm_backlight_device);
6303 }
6304
6305 tpacpi_brightness_checkpoint_nvram();
6306 }
6307
6308 static int brightness_read(char *p)
6309 {
6310 int len = 0;
6311 int level;
6312
6313 level = brightness_get(NULL);
6314 if (level < 0) {
6315 len += sprintf(p + len, "level:\t\tunreadable\n");
6316 } else {
6317 len += sprintf(p + len, "level:\t\t%d\n", level);
6318 len += sprintf(p + len, "commands:\tup, down\n");
6319 len += sprintf(p + len, "commands:\tlevel <level>"
6320 " (<level> is 0-%d)\n",
6321 (tp_features.bright_16levels) ? 15 : 7);
6322 }
6323
6324 return len;
6325 }
6326
6327 static int brightness_write(char *buf)
6328 {
6329 int level;
6330 int rc;
6331 char *cmd;
6332 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6333
6334 level = brightness_get(NULL);
6335 if (level < 0)
6336 return level;
6337
6338 while ((cmd = next_cmd(&buf))) {
6339 if (strlencmp(cmd, "up") == 0) {
6340 if (level < max_level)
6341 level++;
6342 } else if (strlencmp(cmd, "down") == 0) {
6343 if (level > 0)
6344 level--;
6345 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6346 level >= 0 && level <= max_level) {
6347 /* new level set */
6348 } else
6349 return -EINVAL;
6350 }
6351
6352 tpacpi_disclose_usertask("procfs brightness",
6353 "set level to %d\n", level);
6354
6355 /*
6356 * Now we know what the final level should be, so we try to set it.
6357 * Doing it this way makes the syscall restartable in case of EINTR
6358 */
6359 rc = brightness_set(level);
6360 if (!rc && ibm_backlight_device)
6361 backlight_force_update(ibm_backlight_device,
6362 BACKLIGHT_UPDATE_SYSFS);
6363 return (rc == -EINTR)? -ERESTARTSYS : rc;
6364 }
6365
6366 static struct ibm_struct brightness_driver_data = {
6367 .name = "brightness",
6368 .read = brightness_read,
6369 .write = brightness_write,
6370 .exit = brightness_exit,
6371 .suspend = brightness_suspend,
6372 .shutdown = brightness_shutdown,
6373 };
6374
6375 /*************************************************************************
6376 * Volume subdriver
6377 */
6378
6379 /*
6380 * IBM ThinkPads have a simple volume controller with MUTE gating.
6381 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6382 *
6383 * Since the *61 series (and probably also the later *60 series), Lenovo
6384 * ThinkPads only implement the MUTE gate.
6385 *
6386 * EC register 0x30
6387 * Bit 6: MUTE (1 mutes sound)
6388 * Bit 3-0: Volume
6389 * Other bits should be zero as far as we know.
6390 *
6391 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6392 * bits 3-0 (volume). Other bits in NVRAM may have other functions,
6393 * such as bit 7 which is used to detect repeated presses of MUTE,
6394 * and we leave them unchanged.
6395 */
6396
6397 enum {
6398 TP_EC_AUDIO = 0x30,
6399
6400 /* TP_EC_AUDIO bits */
6401 TP_EC_AUDIO_MUTESW = 6,
6402
6403 /* TP_EC_AUDIO bitmasks */
6404 TP_EC_AUDIO_LVL_MSK = 0x0F,
6405 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6406
6407 /* Maximum volume */
6408 TP_EC_VOLUME_MAX = 14,
6409 };
6410
6411 enum tpacpi_volume_access_mode {
6412 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */
6413 TPACPI_VOL_MODE_EC, /* Pure EC control */
6414 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */
6415 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */
6416 TPACPI_VOL_MODE_MAX
6417 };
6418
6419 enum tpacpi_volume_capabilities {
6420 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */
6421 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */
6422 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */
6423 TPACPI_VOL_CAP_MAX
6424 };
6425
6426 static enum tpacpi_volume_access_mode volume_mode =
6427 TPACPI_VOL_MODE_MAX;
6428
6429 static enum tpacpi_volume_capabilities volume_capabilities;
6430 static int volume_control_allowed;
6431
6432 /*
6433 * Used to syncronize writers to TP_EC_AUDIO and
6434 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6435 */
6436 static struct mutex volume_mutex;
6437
6438 static void tpacpi_volume_checkpoint_nvram(void)
6439 {
6440 u8 lec = 0;
6441 u8 b_nvram;
6442 u8 ec_mask;
6443
6444 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6445 return;
6446 if (!volume_control_allowed)
6447 return;
6448
6449 vdbg_printk(TPACPI_DBG_MIXER,
6450 "trying to checkpoint mixer state to NVRAM...\n");
6451
6452 if (tp_features.mixer_no_level_control)
6453 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6454 else
6455 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6456
6457 if (mutex_lock_killable(&volume_mutex) < 0)
6458 return;
6459
6460 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6461 goto unlock;
6462 lec &= ec_mask;
6463 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6464
6465 if (lec != (b_nvram & ec_mask)) {
6466 /* NVRAM needs update */
6467 b_nvram &= ~ec_mask;
6468 b_nvram |= lec;
6469 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6470 dbg_printk(TPACPI_DBG_MIXER,
6471 "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6472 (unsigned int) lec, (unsigned int) b_nvram);
6473 } else {
6474 vdbg_printk(TPACPI_DBG_MIXER,
6475 "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6476 (unsigned int) lec, (unsigned int) b_nvram);
6477 }
6478
6479 unlock:
6480 mutex_unlock(&volume_mutex);
6481 }
6482
6483 static int volume_get_status_ec(u8 *status)
6484 {
6485 u8 s;
6486
6487 if (!acpi_ec_read(TP_EC_AUDIO, &s))
6488 return -EIO;
6489
6490 *status = s;
6491
6492 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6493
6494 return 0;
6495 }
6496
6497 static int volume_get_status(u8 *status)
6498 {
6499 return volume_get_status_ec(status);
6500 }
6501
6502 static int volume_set_status_ec(const u8 status)
6503 {
6504 if (!acpi_ec_write(TP_EC_AUDIO, status))
6505 return -EIO;
6506
6507 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6508
6509 return 0;
6510 }
6511
6512 static int volume_set_status(const u8 status)
6513 {
6514 return volume_set_status_ec(status);
6515 }
6516
6517 static int volume_set_mute_ec(const bool mute)
6518 {
6519 int rc;
6520 u8 s, n;
6521
6522 if (mutex_lock_killable(&volume_mutex) < 0)
6523 return -EINTR;
6524
6525 rc = volume_get_status_ec(&s);
6526 if (rc)
6527 goto unlock;
6528
6529 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6530 s & ~TP_EC_AUDIO_MUTESW_MSK;
6531
6532 if (n != s)
6533 rc = volume_set_status_ec(n);
6534
6535 unlock:
6536 mutex_unlock(&volume_mutex);
6537 return rc;
6538 }
6539
6540 static int volume_set_mute(const bool mute)
6541 {
6542 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6543 (mute) ? "" : "un");
6544 return volume_set_mute_ec(mute);
6545 }
6546
6547 static int volume_set_volume_ec(const u8 vol)
6548 {
6549 int rc;
6550 u8 s, n;
6551
6552 if (vol > TP_EC_VOLUME_MAX)
6553 return -EINVAL;
6554
6555 if (mutex_lock_killable(&volume_mutex) < 0)
6556 return -EINTR;
6557
6558 rc = volume_get_status_ec(&s);
6559 if (rc)
6560 goto unlock;
6561
6562 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6563
6564 if (n != s)
6565 rc = volume_set_status_ec(n);
6566
6567 unlock:
6568 mutex_unlock(&volume_mutex);
6569 return rc;
6570 }
6571
6572 static int volume_set_volume(const u8 vol)
6573 {
6574 dbg_printk(TPACPI_DBG_MIXER,
6575 "trying to set volume level to %hu\n", vol);
6576 return volume_set_volume_ec(vol);
6577 }
6578
6579 static void volume_suspend(pm_message_t state)
6580 {
6581 tpacpi_volume_checkpoint_nvram();
6582 }
6583
6584 static void volume_shutdown(void)
6585 {
6586 tpacpi_volume_checkpoint_nvram();
6587 }
6588
6589 static void volume_exit(void)
6590 {
6591 tpacpi_volume_checkpoint_nvram();
6592 }
6593
6594 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */
6595 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */
6596
6597 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6598 /* Whitelist volume level on all IBM by default */
6599 { .vendor = PCI_VENDOR_ID_IBM,
6600 .bios = TPACPI_MATCH_ANY,
6601 .ec = TPACPI_MATCH_ANY,
6602 .quirks = TPACPI_VOL_Q_LEVEL },
6603
6604 /* Lenovo models with volume control (needs confirmation) */
6605 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6606 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6607 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6608 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6609 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6610 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6611 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6612
6613 /* Whitelist mute-only on all Lenovo by default */
6614 { .vendor = PCI_VENDOR_ID_LENOVO,
6615 .bios = TPACPI_MATCH_ANY,
6616 .ec = TPACPI_MATCH_ANY,
6617 .quirks = TPACPI_VOL_Q_MUTEONLY }
6618 };
6619
6620 static int __init volume_init(struct ibm_init_struct *iibm)
6621 {
6622 unsigned long quirks;
6623
6624 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6625
6626 mutex_init(&volume_mutex);
6627
6628 /*
6629 * Check for module parameter bogosity, note that we
6630 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6631 * able to detect "unspecified"
6632 */
6633 if (volume_mode > TPACPI_VOL_MODE_MAX)
6634 return -EINVAL;
6635
6636 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6637 printk(TPACPI_ERR
6638 "UCMS step volume mode not implemented, "
6639 "please contact %s\n", TPACPI_MAIL);
6640 return 1;
6641 }
6642
6643 if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6644 return -EINVAL;
6645
6646 quirks = tpacpi_check_quirks(volume_quirk_table,
6647 ARRAY_SIZE(volume_quirk_table));
6648
6649 switch (volume_capabilities) {
6650 case TPACPI_VOL_CAP_AUTO:
6651 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6652 tp_features.mixer_no_level_control = 1;
6653 else if (quirks & TPACPI_VOL_Q_LEVEL)
6654 tp_features.mixer_no_level_control = 0;
6655 else
6656 return 1; /* no mixer */
6657 break;
6658 case TPACPI_VOL_CAP_VOLMUTE:
6659 tp_features.mixer_no_level_control = 0;
6660 break;
6661 case TPACPI_VOL_CAP_MUTEONLY:
6662 tp_features.mixer_no_level_control = 1;
6663 break;
6664 default:
6665 return 1;
6666 }
6667
6668 if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6669 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6670 "using user-supplied volume_capabilities=%d\n",
6671 volume_capabilities);
6672
6673 if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6674 volume_mode == TPACPI_VOL_MODE_MAX) {
6675 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6676
6677 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6678 "driver auto-selected volume_mode=%d\n",
6679 volume_mode);
6680 } else {
6681 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6682 "using user-supplied volume_mode=%d\n",
6683 volume_mode);
6684 }
6685
6686 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6687 "mute is supported, volume control is %s\n",
6688 str_supported(!tp_features.mixer_no_level_control));
6689
6690 printk(TPACPI_INFO
6691 "Console audio control enabled, mode: %s\n",
6692 (volume_control_allowed) ?
6693 "override (read/write)" :
6694 "monitor (read only)");
6695
6696 return 0;
6697 }
6698
6699 static int volume_read(char *p)
6700 {
6701 int len = 0;
6702 u8 status;
6703
6704 if (volume_get_status(&status) < 0) {
6705 len += sprintf(p + len, "level:\t\tunreadable\n");
6706 } else {
6707 if (tp_features.mixer_no_level_control)
6708 len += sprintf(p + len, "level:\t\tunsupported\n");
6709 else
6710 len += sprintf(p + len, "level:\t\t%d\n",
6711 status & TP_EC_AUDIO_LVL_MSK);
6712
6713 len += sprintf(p + len, "mute:\t\t%s\n",
6714 onoff(status, TP_EC_AUDIO_MUTESW));
6715
6716 if (volume_control_allowed) {
6717 len += sprintf(p + len, "commands:\tunmute, mute\n");
6718 if (!tp_features.mixer_no_level_control) {
6719 len += sprintf(p + len,
6720 "commands:\tup, down\n");
6721 len += sprintf(p + len,
6722 "commands:\tlevel <level>"
6723 " (<level> is 0-%d)\n",
6724 TP_EC_VOLUME_MAX);
6725 }
6726 }
6727 }
6728
6729 return len;
6730 }
6731
6732 static int volume_write(char *buf)
6733 {
6734 u8 s;
6735 u8 new_level, new_mute;
6736 int l;
6737 char *cmd;
6738 int rc;
6739
6740 /*
6741 * We do allow volume control at driver startup, so that the
6742 * user can set initial state through the volume=... parameter hack.
6743 */
6744 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
6745 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
6746 tp_warned.volume_ctrl_forbidden = 1;
6747 printk(TPACPI_NOTICE
6748 "Console audio control in monitor mode, "
6749 "changes are not allowed.\n");
6750 printk(TPACPI_NOTICE
6751 "Use the volume_control=1 module parameter "
6752 "to enable volume control\n");
6753 }
6754 return -EPERM;
6755 }
6756
6757 rc = volume_get_status(&s);
6758 if (rc < 0)
6759 return rc;
6760
6761 new_level = s & TP_EC_AUDIO_LVL_MSK;
6762 new_mute = s & TP_EC_AUDIO_MUTESW_MSK;
6763
6764 while ((cmd = next_cmd(&buf))) {
6765 if (!tp_features.mixer_no_level_control) {
6766 if (strlencmp(cmd, "up") == 0) {
6767 if (new_mute)
6768 new_mute = 0;
6769 else if (new_level < TP_EC_VOLUME_MAX)
6770 new_level++;
6771 continue;
6772 } else if (strlencmp(cmd, "down") == 0) {
6773 if (new_mute)
6774 new_mute = 0;
6775 else if (new_level > 0)
6776 new_level--;
6777 continue;
6778 } else if (sscanf(cmd, "level %u", &l) == 1 &&
6779 l >= 0 && l <= TP_EC_VOLUME_MAX) {
6780 new_level = l;
6781 continue;
6782 }
6783 }
6784 if (strlencmp(cmd, "mute") == 0)
6785 new_mute = TP_EC_AUDIO_MUTESW_MSK;
6786 else if (strlencmp(cmd, "unmute") == 0)
6787 new_mute = 0;
6788 else
6789 return -EINVAL;
6790 }
6791
6792 if (tp_features.mixer_no_level_control) {
6793 tpacpi_disclose_usertask("procfs volume", "%smute\n",
6794 new_mute ? "" : "un");
6795 rc = volume_set_mute(!!new_mute);
6796 } else {
6797 tpacpi_disclose_usertask("procfs volume",
6798 "%smute and set level to %d\n",
6799 new_mute ? "" : "un", new_level);
6800 rc = volume_set_status(new_mute | new_level);
6801 }
6802
6803 return (rc == -EINTR) ? -ERESTARTSYS : rc;
6804 }
6805
6806 static struct ibm_struct volume_driver_data = {
6807 .name = "volume",
6808 .read = volume_read,
6809 .write = volume_write,
6810 .exit = volume_exit,
6811 .suspend = volume_suspend,
6812 .shutdown = volume_shutdown,
6813 };
6814
6815 /*************************************************************************
6816 * Fan subdriver
6817 */
6818
6819 /*
6820 * FAN ACCESS MODES
6821 *
6822 * TPACPI_FAN_RD_ACPI_GFAN:
6823 * ACPI GFAN method: returns fan level
6824 *
6825 * see TPACPI_FAN_WR_ACPI_SFAN
6826 * EC 0x2f (HFSP) not available if GFAN exists
6827 *
6828 * TPACPI_FAN_WR_ACPI_SFAN:
6829 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6830 *
6831 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6832 * it for writing.
6833 *
6834 * TPACPI_FAN_WR_TPEC:
6835 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6836 * Supported on almost all ThinkPads
6837 *
6838 * Fan speed changes of any sort (including those caused by the
6839 * disengaged mode) are usually done slowly by the firmware as the
6840 * maximum ammount of fan duty cycle change per second seems to be
6841 * limited.
6842 *
6843 * Reading is not available if GFAN exists.
6844 * Writing is not available if SFAN exists.
6845 *
6846 * Bits
6847 * 7 automatic mode engaged;
6848 * (default operation mode of the ThinkPad)
6849 * fan level is ignored in this mode.
6850 * 6 full speed mode (takes precedence over bit 7);
6851 * not available on all thinkpads. May disable
6852 * the tachometer while the fan controller ramps up
6853 * the speed (which can take up to a few *minutes*).
6854 * Speeds up fan to 100% duty-cycle, which is far above
6855 * the standard RPM levels. It is not impossible that
6856 * it could cause hardware damage.
6857 * 5-3 unused in some models. Extra bits for fan level
6858 * in others, but still useless as all values above
6859 * 7 map to the same speed as level 7 in these models.
6860 * 2-0 fan level (0..7 usually)
6861 * 0x00 = stop
6862 * 0x07 = max (set when temperatures critical)
6863 * Some ThinkPads may have other levels, see
6864 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6865 *
6866 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6867 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6868 * does so, its initial value is meaningless (0x07).
6869 *
6870 * For firmware bugs, refer to:
6871 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6872 *
6873 * ----
6874 *
6875 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6876 * Main fan tachometer reading (in RPM)
6877 *
6878 * This register is present on all ThinkPads with a new-style EC, and
6879 * it is known not to be present on the A21m/e, and T22, as there is
6880 * something else in offset 0x84 according to the ACPI DSDT. Other
6881 * ThinkPads from this same time period (and earlier) probably lack the
6882 * tachometer as well.
6883 *
6884 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6885 * was never fixed by IBM to report the EC firmware version string
6886 * probably support the tachometer (like the early X models), so
6887 * detecting it is quite hard. We need more data to know for sure.
6888 *
6889 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6890 * might result.
6891 *
6892 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6893 * mode.
6894 *
6895 * For firmware bugs, refer to:
6896 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6897 *
6898 * ----
6899 *
6900 * ThinkPad EC register 0x31 bit 0 (only on select models)
6901 *
6902 * When bit 0 of EC register 0x31 is zero, the tachometer registers
6903 * show the speed of the main fan. When bit 0 of EC register 0x31
6904 * is one, the tachometer registers show the speed of the auxiliary
6905 * fan.
6906 *
6907 * Fan control seems to affect both fans, regardless of the state
6908 * of this bit.
6909 *
6910 * So far, only the firmware for the X60/X61 non-tablet versions
6911 * seem to support this (firmware TP-7M).
6912 *
6913 * TPACPI_FAN_WR_ACPI_FANS:
6914 * ThinkPad X31, X40, X41. Not available in the X60.
6915 *
6916 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6917 * high speed. ACPI DSDT seems to map these three speeds to levels
6918 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6919 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6920 *
6921 * The speeds are stored on handles
6922 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6923 *
6924 * There are three default speed sets, acessible as handles:
6925 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6926 *
6927 * ACPI DSDT switches which set is in use depending on various
6928 * factors.
6929 *
6930 * TPACPI_FAN_WR_TPEC is also available and should be used to
6931 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6932 * but the ACPI tables just mention level 7.
6933 */
6934
6935 enum { /* Fan control constants */
6936 fan_status_offset = 0x2f, /* EC register 0x2f */
6937 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6938 * 0x84 must be read before 0x85 */
6939 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
6940 bit 0 selects which fan is active */
6941
6942 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6943 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6944
6945 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6946 };
6947
6948 enum fan_status_access_mode {
6949 TPACPI_FAN_NONE = 0, /* No fan status or control */
6950 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6951 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6952 };
6953
6954 enum fan_control_access_mode {
6955 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6956 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6957 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6958 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6959 };
6960
6961 enum fan_control_commands {
6962 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6963 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6964 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6965 * and also watchdog cmd */
6966 };
6967
6968 static int fan_control_allowed;
6969
6970 static enum fan_status_access_mode fan_status_access_mode;
6971 static enum fan_control_access_mode fan_control_access_mode;
6972 static enum fan_control_commands fan_control_commands;
6973
6974 static u8 fan_control_initial_status;
6975 static u8 fan_control_desired_level;
6976 static u8 fan_control_resume_level;
6977 static int fan_watchdog_maxinterval;
6978
6979 static struct mutex fan_mutex;
6980
6981 static void fan_watchdog_fire(struct work_struct *ignored);
6982 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6983
6984 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6985 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6986 "\\FSPD", /* 600e/x, 770e, 770x */
6987 ); /* all others */
6988 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6989 "JFNS", /* 770x-JL */
6990 ); /* all others */
6991
6992 /*
6993 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6994 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6995 * be in auto mode (0x80).
6996 *
6997 * This is corrected by any write to HFSP either by the driver, or
6998 * by the firmware.
6999 *
7000 * We assume 0x07 really means auto mode while this quirk is active,
7001 * as this is far more likely than the ThinkPad being in level 7,
7002 * which is only used by the firmware during thermal emergencies.
7003 *
7004 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7005 * TP-70 (T43, R52), which are known to be buggy.
7006 */
7007
7008 static void fan_quirk1_setup(void)
7009 {
7010 if (fan_control_initial_status == 0x07) {
7011 printk(TPACPI_NOTICE
7012 "fan_init: initial fan status is unknown, "
7013 "assuming it is in auto mode\n");
7014 tp_features.fan_ctrl_status_undef = 1;
7015 }
7016 }
7017
7018 static void fan_quirk1_handle(u8 *fan_status)
7019 {
7020 if (unlikely(tp_features.fan_ctrl_status_undef)) {
7021 if (*fan_status != fan_control_initial_status) {
7022 /* something changed the HFSP regisnter since
7023 * driver init time, so it is not undefined
7024 * anymore */
7025 tp_features.fan_ctrl_status_undef = 0;
7026 } else {
7027 /* Return most likely status. In fact, it
7028 * might be the only possible status */
7029 *fan_status = TP_EC_FAN_AUTO;
7030 }
7031 }
7032 }
7033
7034 /* Select main fan on X60/X61, NOOP on others */
7035 static bool fan_select_fan1(void)
7036 {
7037 if (tp_features.second_fan) {
7038 u8 val;
7039
7040 if (ec_read(fan_select_offset, &val) < 0)
7041 return false;
7042 val &= 0xFEU;
7043 if (ec_write(fan_select_offset, val) < 0)
7044 return false;
7045 }
7046 return true;
7047 }
7048
7049 /* Select secondary fan on X60/X61 */
7050 static bool fan_select_fan2(void)
7051 {
7052 u8 val;
7053
7054 if (!tp_features.second_fan)
7055 return false;
7056
7057 if (ec_read(fan_select_offset, &val) < 0)
7058 return false;
7059 val |= 0x01U;
7060 if (ec_write(fan_select_offset, val) < 0)
7061 return false;
7062
7063 return true;
7064 }
7065
7066 /*
7067 * Call with fan_mutex held
7068 */
7069 static void fan_update_desired_level(u8 status)
7070 {
7071 if ((status &
7072 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7073 if (status > 7)
7074 fan_control_desired_level = 7;
7075 else
7076 fan_control_desired_level = status;
7077 }
7078 }
7079
7080 static int fan_get_status(u8 *status)
7081 {
7082 u8 s;
7083
7084 /* TODO:
7085 * Add TPACPI_FAN_RD_ACPI_FANS ? */
7086
7087 switch (fan_status_access_mode) {
7088 case TPACPI_FAN_RD_ACPI_GFAN:
7089 /* 570, 600e/x, 770e, 770x */
7090
7091 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
7092 return -EIO;
7093
7094 if (likely(status))
7095 *status = s & 0x07;
7096
7097 break;
7098
7099 case TPACPI_FAN_RD_TPEC:
7100 /* all except 570, 600e/x, 770e, 770x */
7101 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7102 return -EIO;
7103
7104 if (likely(status)) {
7105 *status = s;
7106 fan_quirk1_handle(status);
7107 }
7108
7109 break;
7110
7111 default:
7112 return -ENXIO;
7113 }
7114
7115 return 0;
7116 }
7117
7118 static int fan_get_status_safe(u8 *status)
7119 {
7120 int rc;
7121 u8 s;
7122
7123 if (mutex_lock_killable(&fan_mutex))
7124 return -ERESTARTSYS;
7125 rc = fan_get_status(&s);
7126 if (!rc)
7127 fan_update_desired_level(s);
7128 mutex_unlock(&fan_mutex);
7129
7130 if (status)
7131 *status = s;
7132
7133 return rc;
7134 }
7135
7136 static int fan_get_speed(unsigned int *speed)
7137 {
7138 u8 hi, lo;
7139
7140 switch (fan_status_access_mode) {
7141 case TPACPI_FAN_RD_TPEC:
7142 /* all except 570, 600e/x, 770e, 770x */
7143 if (unlikely(!fan_select_fan1()))
7144 return -EIO;
7145 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7146 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7147 return -EIO;
7148
7149 if (likely(speed))
7150 *speed = (hi << 8) | lo;
7151
7152 break;
7153
7154 default:
7155 return -ENXIO;
7156 }
7157
7158 return 0;
7159 }
7160
7161 static int fan2_get_speed(unsigned int *speed)
7162 {
7163 u8 hi, lo;
7164 bool rc;
7165
7166 switch (fan_status_access_mode) {
7167 case TPACPI_FAN_RD_TPEC:
7168 /* all except 570, 600e/x, 770e, 770x */
7169 if (unlikely(!fan_select_fan2()))
7170 return -EIO;
7171 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7172 !acpi_ec_read(fan_rpm_offset + 1, &hi);
7173 fan_select_fan1(); /* play it safe */
7174 if (rc)
7175 return -EIO;
7176
7177 if (likely(speed))
7178 *speed = (hi << 8) | lo;
7179
7180 break;
7181
7182 default:
7183 return -ENXIO;
7184 }
7185
7186 return 0;
7187 }
7188
7189 static int fan_set_level(int level)
7190 {
7191 if (!fan_control_allowed)
7192 return -EPERM;
7193
7194 switch (fan_control_access_mode) {
7195 case TPACPI_FAN_WR_ACPI_SFAN:
7196 if (level >= 0 && level <= 7) {
7197 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7198 return -EIO;
7199 } else
7200 return -EINVAL;
7201 break;
7202
7203 case TPACPI_FAN_WR_ACPI_FANS:
7204 case TPACPI_FAN_WR_TPEC:
7205 if (!(level & TP_EC_FAN_AUTO) &&
7206 !(level & TP_EC_FAN_FULLSPEED) &&
7207 ((level < 0) || (level > 7)))
7208 return -EINVAL;
7209
7210 /* safety net should the EC not support AUTO
7211 * or FULLSPEED mode bits and just ignore them */
7212 if (level & TP_EC_FAN_FULLSPEED)
7213 level |= 7; /* safety min speed 7 */
7214 else if (level & TP_EC_FAN_AUTO)
7215 level |= 4; /* safety min speed 4 */
7216
7217 if (!acpi_ec_write(fan_status_offset, level))
7218 return -EIO;
7219 else
7220 tp_features.fan_ctrl_status_undef = 0;
7221 break;
7222
7223 default:
7224 return -ENXIO;
7225 }
7226
7227 vdbg_printk(TPACPI_DBG_FAN,
7228 "fan control: set fan control register to 0x%02x\n", level);
7229 return 0;
7230 }
7231
7232 static int fan_set_level_safe(int level)
7233 {
7234 int rc;
7235
7236 if (!fan_control_allowed)
7237 return -EPERM;
7238
7239 if (mutex_lock_killable(&fan_mutex))
7240 return -ERESTARTSYS;
7241
7242 if (level == TPACPI_FAN_LAST_LEVEL)
7243 level = fan_control_desired_level;
7244
7245 rc = fan_set_level(level);
7246 if (!rc)
7247 fan_update_desired_level(level);
7248
7249 mutex_unlock(&fan_mutex);
7250 return rc;
7251 }
7252
7253 static int fan_set_enable(void)
7254 {
7255 u8 s;
7256 int rc;
7257
7258 if (!fan_control_allowed)
7259 return -EPERM;
7260
7261 if (mutex_lock_killable(&fan_mutex))
7262 return -ERESTARTSYS;
7263
7264 switch (fan_control_access_mode) {
7265 case TPACPI_FAN_WR_ACPI_FANS:
7266 case TPACPI_FAN_WR_TPEC:
7267 rc = fan_get_status(&s);
7268 if (rc < 0)
7269 break;
7270
7271 /* Don't go out of emergency fan mode */
7272 if (s != 7) {
7273 s &= 0x07;
7274 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7275 }
7276
7277 if (!acpi_ec_write(fan_status_offset, s))
7278 rc = -EIO;
7279 else {
7280 tp_features.fan_ctrl_status_undef = 0;
7281 rc = 0;
7282 }
7283 break;
7284
7285 case TPACPI_FAN_WR_ACPI_SFAN:
7286 rc = fan_get_status(&s);
7287 if (rc < 0)
7288 break;
7289
7290 s &= 0x07;
7291
7292 /* Set fan to at least level 4 */
7293 s |= 4;
7294
7295 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7296 rc = -EIO;
7297 else
7298 rc = 0;
7299 break;
7300
7301 default:
7302 rc = -ENXIO;
7303 }
7304
7305 mutex_unlock(&fan_mutex);
7306
7307 if (!rc)
7308 vdbg_printk(TPACPI_DBG_FAN,
7309 "fan control: set fan control register to 0x%02x\n",
7310 s);
7311 return rc;
7312 }
7313
7314 static int fan_set_disable(void)
7315 {
7316 int rc;
7317
7318 if (!fan_control_allowed)
7319 return -EPERM;
7320
7321 if (mutex_lock_killable(&fan_mutex))
7322 return -ERESTARTSYS;
7323
7324 rc = 0;
7325 switch (fan_control_access_mode) {
7326 case TPACPI_FAN_WR_ACPI_FANS:
7327 case TPACPI_FAN_WR_TPEC:
7328 if (!acpi_ec_write(fan_status_offset, 0x00))
7329 rc = -EIO;
7330 else {
7331 fan_control_desired_level = 0;
7332 tp_features.fan_ctrl_status_undef = 0;
7333 }
7334 break;
7335
7336 case TPACPI_FAN_WR_ACPI_SFAN:
7337 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7338 rc = -EIO;
7339 else
7340 fan_control_desired_level = 0;
7341 break;
7342
7343 default:
7344 rc = -ENXIO;
7345 }
7346
7347 if (!rc)
7348 vdbg_printk(TPACPI_DBG_FAN,
7349 "fan control: set fan control register to 0\n");
7350
7351 mutex_unlock(&fan_mutex);
7352 return rc;
7353 }
7354
7355 static int fan_set_speed(int speed)
7356 {
7357 int rc;
7358
7359 if (!fan_control_allowed)
7360 return -EPERM;
7361
7362 if (mutex_lock_killable(&fan_mutex))
7363 return -ERESTARTSYS;
7364
7365 rc = 0;
7366 switch (fan_control_access_mode) {
7367 case TPACPI_FAN_WR_ACPI_FANS:
7368 if (speed >= 0 && speed <= 65535) {
7369 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7370 speed, speed, speed))
7371 rc = -EIO;
7372 } else
7373 rc = -EINVAL;
7374 break;
7375
7376 default:
7377 rc = -ENXIO;
7378 }
7379
7380 mutex_unlock(&fan_mutex);
7381 return rc;
7382 }
7383
7384 static void fan_watchdog_reset(void)
7385 {
7386 static int fan_watchdog_active;
7387
7388 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7389 return;
7390
7391 if (fan_watchdog_active)
7392 cancel_delayed_work(&fan_watchdog_task);
7393
7394 if (fan_watchdog_maxinterval > 0 &&
7395 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7396 fan_watchdog_active = 1;
7397 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7398 msecs_to_jiffies(fan_watchdog_maxinterval
7399 * 1000))) {
7400 printk(TPACPI_ERR
7401 "failed to queue the fan watchdog, "
7402 "watchdog will not trigger\n");
7403 }
7404 } else
7405 fan_watchdog_active = 0;
7406 }
7407
7408 static void fan_watchdog_fire(struct work_struct *ignored)
7409 {
7410 int rc;
7411
7412 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7413 return;
7414
7415 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7416 rc = fan_set_enable();
7417 if (rc < 0) {
7418 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7419 "will try again later...\n", -rc);
7420 /* reschedule for later */
7421 fan_watchdog_reset();
7422 }
7423 }
7424
7425 /*
7426 * SYSFS fan layout: hwmon compatible (device)
7427 *
7428 * pwm*_enable:
7429 * 0: "disengaged" mode
7430 * 1: manual mode
7431 * 2: native EC "auto" mode (recommended, hardware default)
7432 *
7433 * pwm*: set speed in manual mode, ignored otherwise.
7434 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7435 * interpolation.
7436 *
7437 * fan*_input: tachometer reading, RPM
7438 *
7439 *
7440 * SYSFS fan layout: extensions
7441 *
7442 * fan_watchdog (driver):
7443 * fan watchdog interval in seconds, 0 disables (default), max 120
7444 */
7445
7446 /* sysfs fan pwm1_enable ----------------------------------------------- */
7447 static ssize_t fan_pwm1_enable_show(struct device *dev,
7448 struct device_attribute *attr,
7449 char *buf)
7450 {
7451 int res, mode;
7452 u8 status;
7453
7454 res = fan_get_status_safe(&status);
7455 if (res)
7456 return res;
7457
7458 if (status & TP_EC_FAN_FULLSPEED) {
7459 mode = 0;
7460 } else if (status & TP_EC_FAN_AUTO) {
7461 mode = 2;
7462 } else
7463 mode = 1;
7464
7465 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7466 }
7467
7468 static ssize_t fan_pwm1_enable_store(struct device *dev,
7469 struct device_attribute *attr,
7470 const char *buf, size_t count)
7471 {
7472 unsigned long t;
7473 int res, level;
7474
7475 if (parse_strtoul(buf, 2, &t))
7476 return -EINVAL;
7477
7478 tpacpi_disclose_usertask("hwmon pwm1_enable",
7479 "set fan mode to %lu\n", t);
7480
7481 switch (t) {
7482 case 0:
7483 level = TP_EC_FAN_FULLSPEED;
7484 break;
7485 case 1:
7486 level = TPACPI_FAN_LAST_LEVEL;
7487 break;
7488 case 2:
7489 level = TP_EC_FAN_AUTO;
7490 break;
7491 case 3:
7492 /* reserved for software-controlled auto mode */
7493 return -ENOSYS;
7494 default:
7495 return -EINVAL;
7496 }
7497
7498 res = fan_set_level_safe(level);
7499 if (res == -ENXIO)
7500 return -EINVAL;
7501 else if (res < 0)
7502 return res;
7503
7504 fan_watchdog_reset();
7505
7506 return count;
7507 }
7508
7509 static struct device_attribute dev_attr_fan_pwm1_enable =
7510 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7511 fan_pwm1_enable_show, fan_pwm1_enable_store);
7512
7513 /* sysfs fan pwm1 ------------------------------------------------------ */
7514 static ssize_t fan_pwm1_show(struct device *dev,
7515 struct device_attribute *attr,
7516 char *buf)
7517 {
7518 int res;
7519 u8 status;
7520
7521 res = fan_get_status_safe(&status);
7522 if (res)
7523 return res;
7524
7525 if ((status &
7526 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7527 status = fan_control_desired_level;
7528
7529 if (status > 7)
7530 status = 7;
7531
7532 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7533 }
7534
7535 static ssize_t fan_pwm1_store(struct device *dev,
7536 struct device_attribute *attr,
7537 const char *buf, size_t count)
7538 {
7539 unsigned long s;
7540 int rc;
7541 u8 status, newlevel;
7542
7543 if (parse_strtoul(buf, 255, &s))
7544 return -EINVAL;
7545
7546 tpacpi_disclose_usertask("hwmon pwm1",
7547 "set fan speed to %lu\n", s);
7548
7549 /* scale down from 0-255 to 0-7 */
7550 newlevel = (s >> 5) & 0x07;
7551
7552 if (mutex_lock_killable(&fan_mutex))
7553 return -ERESTARTSYS;
7554
7555 rc = fan_get_status(&status);
7556 if (!rc && (status &
7557 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7558 rc = fan_set_level(newlevel);
7559 if (rc == -ENXIO)
7560 rc = -EINVAL;
7561 else if (!rc) {
7562 fan_update_desired_level(newlevel);
7563 fan_watchdog_reset();
7564 }
7565 }
7566
7567 mutex_unlock(&fan_mutex);
7568 return (rc)? rc : count;
7569 }
7570
7571 static struct device_attribute dev_attr_fan_pwm1 =
7572 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7573 fan_pwm1_show, fan_pwm1_store);
7574
7575 /* sysfs fan fan1_input ------------------------------------------------ */
7576 static ssize_t fan_fan1_input_show(struct device *dev,
7577 struct device_attribute *attr,
7578 char *buf)
7579 {
7580 int res;
7581 unsigned int speed;
7582
7583 res = fan_get_speed(&speed);
7584 if (res < 0)
7585 return res;
7586
7587 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7588 }
7589
7590 static struct device_attribute dev_attr_fan_fan1_input =
7591 __ATTR(fan1_input, S_IRUGO,
7592 fan_fan1_input_show, NULL);
7593
7594 /* sysfs fan fan2_input ------------------------------------------------ */
7595 static ssize_t fan_fan2_input_show(struct device *dev,
7596 struct device_attribute *attr,
7597 char *buf)
7598 {
7599 int res;
7600 unsigned int speed;
7601
7602 res = fan2_get_speed(&speed);
7603 if (res < 0)
7604 return res;
7605
7606 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7607 }
7608
7609 static struct device_attribute dev_attr_fan_fan2_input =
7610 __ATTR(fan2_input, S_IRUGO,
7611 fan_fan2_input_show, NULL);
7612
7613 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7614 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7615 char *buf)
7616 {
7617 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7618 }
7619
7620 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7621 const char *buf, size_t count)
7622 {
7623 unsigned long t;
7624
7625 if (parse_strtoul(buf, 120, &t))
7626 return -EINVAL;
7627
7628 if (!fan_control_allowed)
7629 return -EPERM;
7630
7631 fan_watchdog_maxinterval = t;
7632 fan_watchdog_reset();
7633
7634 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7635
7636 return count;
7637 }
7638
7639 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7640 fan_fan_watchdog_show, fan_fan_watchdog_store);
7641
7642 /* --------------------------------------------------------------------- */
7643 static struct attribute *fan_attributes[] = {
7644 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7645 &dev_attr_fan_fan1_input.attr,
7646 NULL, /* for fan2_input */
7647 NULL
7648 };
7649
7650 static const struct attribute_group fan_attr_group = {
7651 .attrs = fan_attributes,
7652 };
7653
7654 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7655 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7656
7657 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7658 { .vendor = PCI_VENDOR_ID_IBM, \
7659 .bios = TPACPI_MATCH_ANY, \
7660 .ec = TPID(__id1, __id2), \
7661 .quirks = __quirks }
7662
7663 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7664 { .vendor = PCI_VENDOR_ID_LENOVO, \
7665 .bios = TPACPI_MATCH_ANY, \
7666 .ec = TPID(__id1, __id2), \
7667 .quirks = __quirks }
7668
7669 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7670 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7671 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7672 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7673 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7674 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7675 };
7676
7677 #undef TPACPI_FAN_QL
7678 #undef TPACPI_FAN_QI
7679
7680 static int __init fan_init(struct ibm_init_struct *iibm)
7681 {
7682 int rc;
7683 unsigned long quirks;
7684
7685 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7686 "initializing fan subdriver\n");
7687
7688 mutex_init(&fan_mutex);
7689 fan_status_access_mode = TPACPI_FAN_NONE;
7690 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7691 fan_control_commands = 0;
7692 fan_watchdog_maxinterval = 0;
7693 tp_features.fan_ctrl_status_undef = 0;
7694 tp_features.second_fan = 0;
7695 fan_control_desired_level = 7;
7696
7697 TPACPI_ACPIHANDLE_INIT(fans);
7698 TPACPI_ACPIHANDLE_INIT(gfan);
7699 TPACPI_ACPIHANDLE_INIT(sfan);
7700
7701 quirks = tpacpi_check_quirks(fan_quirk_table,
7702 ARRAY_SIZE(fan_quirk_table));
7703
7704 if (gfan_handle) {
7705 /* 570, 600e/x, 770e, 770x */
7706 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7707 } else {
7708 /* all other ThinkPads: note that even old-style
7709 * ThinkPad ECs supports the fan control register */
7710 if (likely(acpi_ec_read(fan_status_offset,
7711 &fan_control_initial_status))) {
7712 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7713 if (quirks & TPACPI_FAN_Q1)
7714 fan_quirk1_setup();
7715 if (quirks & TPACPI_FAN_2FAN) {
7716 tp_features.second_fan = 1;
7717 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7718 "secondary fan support enabled\n");
7719 }
7720 } else {
7721 printk(TPACPI_ERR
7722 "ThinkPad ACPI EC access misbehaving, "
7723 "fan status and control unavailable\n");
7724 return 1;
7725 }
7726 }
7727
7728 if (sfan_handle) {
7729 /* 570, 770x-JL */
7730 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7731 fan_control_commands |=
7732 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7733 } else {
7734 if (!gfan_handle) {
7735 /* gfan without sfan means no fan control */
7736 /* all other models implement TP EC 0x2f control */
7737
7738 if (fans_handle) {
7739 /* X31, X40, X41 */
7740 fan_control_access_mode =
7741 TPACPI_FAN_WR_ACPI_FANS;
7742 fan_control_commands |=
7743 TPACPI_FAN_CMD_SPEED |
7744 TPACPI_FAN_CMD_LEVEL |
7745 TPACPI_FAN_CMD_ENABLE;
7746 } else {
7747 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7748 fan_control_commands |=
7749 TPACPI_FAN_CMD_LEVEL |
7750 TPACPI_FAN_CMD_ENABLE;
7751 }
7752 }
7753 }
7754
7755 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7756 "fan is %s, modes %d, %d\n",
7757 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7758 fan_control_access_mode != TPACPI_FAN_WR_NONE),
7759 fan_status_access_mode, fan_control_access_mode);
7760
7761 /* fan control master switch */
7762 if (!fan_control_allowed) {
7763 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7764 fan_control_commands = 0;
7765 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7766 "fan control features disabled by parameter\n");
7767 }
7768
7769 /* update fan_control_desired_level */
7770 if (fan_status_access_mode != TPACPI_FAN_NONE)
7771 fan_get_status_safe(NULL);
7772
7773 if (fan_status_access_mode != TPACPI_FAN_NONE ||
7774 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7775 if (tp_features.second_fan) {
7776 /* attach second fan tachometer */
7777 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7778 &dev_attr_fan_fan2_input.attr;
7779 }
7780 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7781 &fan_attr_group);
7782 if (rc < 0)
7783 return rc;
7784
7785 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7786 &driver_attr_fan_watchdog);
7787 if (rc < 0) {
7788 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7789 &fan_attr_group);
7790 return rc;
7791 }
7792 return 0;
7793 } else
7794 return 1;
7795 }
7796
7797 static void fan_exit(void)
7798 {
7799 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7800 "cancelling any pending fan watchdog tasks\n");
7801
7802 /* FIXME: can we really do this unconditionally? */
7803 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7804 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7805 &driver_attr_fan_watchdog);
7806
7807 cancel_delayed_work(&fan_watchdog_task);
7808 flush_workqueue(tpacpi_wq);
7809 }
7810
7811 static void fan_suspend(pm_message_t state)
7812 {
7813 int rc;
7814
7815 if (!fan_control_allowed)
7816 return;
7817
7818 /* Store fan status in cache */
7819 fan_control_resume_level = 0;
7820 rc = fan_get_status_safe(&fan_control_resume_level);
7821 if (rc < 0)
7822 printk(TPACPI_NOTICE
7823 "failed to read fan level for later "
7824 "restore during resume: %d\n", rc);
7825
7826 /* if it is undefined, don't attempt to restore it.
7827 * KEEP THIS LAST */
7828 if (tp_features.fan_ctrl_status_undef)
7829 fan_control_resume_level = 0;
7830 }
7831
7832 static void fan_resume(void)
7833 {
7834 u8 current_level = 7;
7835 bool do_set = false;
7836 int rc;
7837
7838 /* DSDT *always* updates status on resume */
7839 tp_features.fan_ctrl_status_undef = 0;
7840
7841 if (!fan_control_allowed ||
7842 !fan_control_resume_level ||
7843 (fan_get_status_safe(&current_level) < 0))
7844 return;
7845
7846 switch (fan_control_access_mode) {
7847 case TPACPI_FAN_WR_ACPI_SFAN:
7848 /* never decrease fan level */
7849 do_set = (fan_control_resume_level > current_level);
7850 break;
7851 case TPACPI_FAN_WR_ACPI_FANS:
7852 case TPACPI_FAN_WR_TPEC:
7853 /* never decrease fan level, scale is:
7854 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7855 *
7856 * We expect the firmware to set either 7 or AUTO, but we
7857 * handle FULLSPEED out of paranoia.
7858 *
7859 * So, we can safely only restore FULLSPEED or 7, anything
7860 * else could slow the fan. Restoring AUTO is useless, at
7861 * best that's exactly what the DSDT already set (it is the
7862 * slower it uses).
7863 *
7864 * Always keep in mind that the DSDT *will* have set the
7865 * fans to what the vendor supposes is the best level. We
7866 * muck with it only to speed the fan up.
7867 */
7868 if (fan_control_resume_level != 7 &&
7869 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7870 return;
7871 else
7872 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7873 (current_level != fan_control_resume_level);
7874 break;
7875 default:
7876 return;
7877 }
7878 if (do_set) {
7879 printk(TPACPI_NOTICE
7880 "restoring fan level to 0x%02x\n",
7881 fan_control_resume_level);
7882 rc = fan_set_level_safe(fan_control_resume_level);
7883 if (rc < 0)
7884 printk(TPACPI_NOTICE
7885 "failed to restore fan level: %d\n", rc);
7886 }
7887 }
7888
7889 static int fan_read(char *p)
7890 {
7891 int len = 0;
7892 int rc;
7893 u8 status;
7894 unsigned int speed = 0;
7895
7896 switch (fan_status_access_mode) {
7897 case TPACPI_FAN_RD_ACPI_GFAN:
7898 /* 570, 600e/x, 770e, 770x */
7899 rc = fan_get_status_safe(&status);
7900 if (rc < 0)
7901 return rc;
7902
7903 len += sprintf(p + len, "status:\t\t%s\n"
7904 "level:\t\t%d\n",
7905 (status != 0) ? "enabled" : "disabled", status);
7906 break;
7907
7908 case TPACPI_FAN_RD_TPEC:
7909 /* all except 570, 600e/x, 770e, 770x */
7910 rc = fan_get_status_safe(&status);
7911 if (rc < 0)
7912 return rc;
7913
7914 len += sprintf(p + len, "status:\t\t%s\n",
7915 (status != 0) ? "enabled" : "disabled");
7916
7917 rc = fan_get_speed(&speed);
7918 if (rc < 0)
7919 return rc;
7920
7921 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7922
7923 if (status & TP_EC_FAN_FULLSPEED)
7924 /* Disengaged mode takes precedence */
7925 len += sprintf(p + len, "level:\t\tdisengaged\n");
7926 else if (status & TP_EC_FAN_AUTO)
7927 len += sprintf(p + len, "level:\t\tauto\n");
7928 else
7929 len += sprintf(p + len, "level:\t\t%d\n", status);
7930 break;
7931
7932 case TPACPI_FAN_NONE:
7933 default:
7934 len += sprintf(p + len, "status:\t\tnot supported\n");
7935 }
7936
7937 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7938 len += sprintf(p + len, "commands:\tlevel <level>");
7939
7940 switch (fan_control_access_mode) {
7941 case TPACPI_FAN_WR_ACPI_SFAN:
7942 len += sprintf(p + len, " (<level> is 0-7)\n");
7943 break;
7944
7945 default:
7946 len += sprintf(p + len, " (<level> is 0-7, "
7947 "auto, disengaged, full-speed)\n");
7948 break;
7949 }
7950 }
7951
7952 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7953 len += sprintf(p + len, "commands:\tenable, disable\n"
7954 "commands:\twatchdog <timeout> (<timeout> "
7955 "is 0 (off), 1-120 (seconds))\n");
7956
7957 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7958 len += sprintf(p + len, "commands:\tspeed <speed>"
7959 " (<speed> is 0-65535)\n");
7960
7961 return len;
7962 }
7963
7964 static int fan_write_cmd_level(const char *cmd, int *rc)
7965 {
7966 int level;
7967
7968 if (strlencmp(cmd, "level auto") == 0)
7969 level = TP_EC_FAN_AUTO;
7970 else if ((strlencmp(cmd, "level disengaged") == 0) |
7971 (strlencmp(cmd, "level full-speed") == 0))
7972 level = TP_EC_FAN_FULLSPEED;
7973 else if (sscanf(cmd, "level %d", &level) != 1)
7974 return 0;
7975
7976 *rc = fan_set_level_safe(level);
7977 if (*rc == -ENXIO)
7978 printk(TPACPI_ERR "level command accepted for unsupported "
7979 "access mode %d", fan_control_access_mode);
7980 else if (!*rc)
7981 tpacpi_disclose_usertask("procfs fan",
7982 "set level to %d\n", level);
7983
7984 return 1;
7985 }
7986
7987 static int fan_write_cmd_enable(const char *cmd, int *rc)
7988 {
7989 if (strlencmp(cmd, "enable") != 0)
7990 return 0;
7991
7992 *rc = fan_set_enable();
7993 if (*rc == -ENXIO)
7994 printk(TPACPI_ERR "enable command accepted for unsupported "
7995 "access mode %d", fan_control_access_mode);
7996 else if (!*rc)
7997 tpacpi_disclose_usertask("procfs fan", "enable\n");
7998
7999 return 1;
8000 }
8001
8002 static int fan_write_cmd_disable(const char *cmd, int *rc)
8003 {
8004 if (strlencmp(cmd, "disable") != 0)
8005 return 0;
8006
8007 *rc = fan_set_disable();
8008 if (*rc == -ENXIO)
8009 printk(TPACPI_ERR "disable command accepted for unsupported "
8010 "access mode %d", fan_control_access_mode);
8011 else if (!*rc)
8012 tpacpi_disclose_usertask("procfs fan", "disable\n");
8013
8014 return 1;
8015 }
8016
8017 static int fan_write_cmd_speed(const char *cmd, int *rc)
8018 {
8019 int speed;
8020
8021 /* TODO:
8022 * Support speed <low> <medium> <high> ? */
8023
8024 if (sscanf(cmd, "speed %d", &speed) != 1)
8025 return 0;
8026
8027 *rc = fan_set_speed(speed);
8028 if (*rc == -ENXIO)
8029 printk(TPACPI_ERR "speed command accepted for unsupported "
8030 "access mode %d", fan_control_access_mode);
8031 else if (!*rc)
8032 tpacpi_disclose_usertask("procfs fan",
8033 "set speed to %d\n", speed);
8034
8035 return 1;
8036 }
8037
8038 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8039 {
8040 int interval;
8041
8042 if (sscanf(cmd, "watchdog %d", &interval) != 1)
8043 return 0;
8044
8045 if (interval < 0 || interval > 120)
8046 *rc = -EINVAL;
8047 else {
8048 fan_watchdog_maxinterval = interval;
8049 tpacpi_disclose_usertask("procfs fan",
8050 "set watchdog timer to %d\n",
8051 interval);
8052 }
8053
8054 return 1;
8055 }
8056
8057 static int fan_write(char *buf)
8058 {
8059 char *cmd;
8060 int rc = 0;
8061
8062 while (!rc && (cmd = next_cmd(&buf))) {
8063 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8064 fan_write_cmd_level(cmd, &rc)) &&
8065 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8066 (fan_write_cmd_enable(cmd, &rc) ||
8067 fan_write_cmd_disable(cmd, &rc) ||
8068 fan_write_cmd_watchdog(cmd, &rc))) &&
8069 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8070 fan_write_cmd_speed(cmd, &rc))
8071 )
8072 rc = -EINVAL;
8073 else if (!rc)
8074 fan_watchdog_reset();
8075 }
8076
8077 return rc;
8078 }
8079
8080 static struct ibm_struct fan_driver_data = {
8081 .name = "fan",
8082 .read = fan_read,
8083 .write = fan_write,
8084 .exit = fan_exit,
8085 .suspend = fan_suspend,
8086 .resume = fan_resume,
8087 };
8088
8089 /****************************************************************************
8090 ****************************************************************************
8091 *
8092 * Infrastructure
8093 *
8094 ****************************************************************************
8095 ****************************************************************************/
8096
8097 /*
8098 * HKEY event callout for other subdrivers go here
8099 * (yes, it is ugly, but it is quick, safe, and gets the job done
8100 */
8101 static void tpacpi_driver_event(const unsigned int hkey_event)
8102 {
8103 if (ibm_backlight_device) {
8104 switch (hkey_event) {
8105 case TP_HKEY_EV_BRGHT_UP:
8106 case TP_HKEY_EV_BRGHT_DOWN:
8107 tpacpi_brightness_notify_change();
8108 }
8109 }
8110 }
8111
8112
8113
8114 static void hotkey_driver_event(const unsigned int scancode)
8115 {
8116 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8117 }
8118
8119 /* sysfs name ---------------------------------------------------------- */
8120 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8121 struct device_attribute *attr,
8122 char *buf)
8123 {
8124 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8125 }
8126
8127 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8128 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8129
8130 /* --------------------------------------------------------------------- */
8131
8132 /* /proc support */
8133 static struct proc_dir_entry *proc_dir;
8134
8135 /*
8136 * Module and infrastructure proble, init and exit handling
8137 */
8138
8139 static int force_load;
8140
8141 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8142 static const char * __init str_supported(int is_supported)
8143 {
8144 static char text_unsupported[] __initdata = "not supported";
8145
8146 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8147 }
8148 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8149
8150 static void ibm_exit(struct ibm_struct *ibm)
8151 {
8152 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8153
8154 list_del_init(&ibm->all_drivers);
8155
8156 if (ibm->flags.acpi_notify_installed) {
8157 dbg_printk(TPACPI_DBG_EXIT,
8158 "%s: acpi_remove_notify_handler\n", ibm->name);
8159 BUG_ON(!ibm->acpi);
8160 acpi_remove_notify_handler(*ibm->acpi->handle,
8161 ibm->acpi->type,
8162 dispatch_acpi_notify);
8163 ibm->flags.acpi_notify_installed = 0;
8164 ibm->flags.acpi_notify_installed = 0;
8165 }
8166
8167 if (ibm->flags.proc_created) {
8168 dbg_printk(TPACPI_DBG_EXIT,
8169 "%s: remove_proc_entry\n", ibm->name);
8170 remove_proc_entry(ibm->name, proc_dir);
8171 ibm->flags.proc_created = 0;
8172 }
8173
8174 if (ibm->flags.acpi_driver_registered) {
8175 dbg_printk(TPACPI_DBG_EXIT,
8176 "%s: acpi_bus_unregister_driver\n", ibm->name);
8177 BUG_ON(!ibm->acpi);
8178 acpi_bus_unregister_driver(ibm->acpi->driver);
8179 kfree(ibm->acpi->driver);
8180 ibm->acpi->driver = NULL;
8181 ibm->flags.acpi_driver_registered = 0;
8182 }
8183
8184 if (ibm->flags.init_called && ibm->exit) {
8185 ibm->exit();
8186 ibm->flags.init_called = 0;
8187 }
8188
8189 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8190 }
8191
8192 static int __init ibm_init(struct ibm_init_struct *iibm)
8193 {
8194 int ret;
8195 struct ibm_struct *ibm = iibm->data;
8196 struct proc_dir_entry *entry;
8197
8198 BUG_ON(ibm == NULL);
8199
8200 INIT_LIST_HEAD(&ibm->all_drivers);
8201
8202 if (ibm->flags.experimental && !experimental)
8203 return 0;
8204
8205 dbg_printk(TPACPI_DBG_INIT,
8206 "probing for %s\n", ibm->name);
8207
8208 if (iibm->init) {
8209 ret = iibm->init(iibm);
8210 if (ret > 0)
8211 return 0; /* probe failed */
8212 if (ret)
8213 return ret;
8214
8215 ibm->flags.init_called = 1;
8216 }
8217
8218 if (ibm->acpi) {
8219 if (ibm->acpi->hid) {
8220 ret = register_tpacpi_subdriver(ibm);
8221 if (ret)
8222 goto err_out;
8223 }
8224
8225 if (ibm->acpi->notify) {
8226 ret = setup_acpi_notify(ibm);
8227 if (ret == -ENODEV) {
8228 printk(TPACPI_NOTICE "disabling subdriver %s\n",
8229 ibm->name);
8230 ret = 0;
8231 goto err_out;
8232 }
8233 if (ret < 0)
8234 goto err_out;
8235 }
8236 }
8237
8238 dbg_printk(TPACPI_DBG_INIT,
8239 "%s installed\n", ibm->name);
8240
8241 if (ibm->read) {
8242 entry = create_proc_entry(ibm->name,
8243 S_IFREG | S_IRUGO | S_IWUSR,
8244 proc_dir);
8245 if (!entry) {
8246 printk(TPACPI_ERR "unable to create proc entry %s\n",
8247 ibm->name);
8248 ret = -ENODEV;
8249 goto err_out;
8250 }
8251 entry->data = ibm;
8252 entry->read_proc = &dispatch_procfs_read;
8253 if (ibm->write)
8254 entry->write_proc = &dispatch_procfs_write;
8255 ibm->flags.proc_created = 1;
8256 }
8257
8258 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8259
8260 return 0;
8261
8262 err_out:
8263 dbg_printk(TPACPI_DBG_INIT,
8264 "%s: at error exit path with result %d\n",
8265 ibm->name, ret);
8266
8267 ibm_exit(ibm);
8268 return (ret < 0)? ret : 0;
8269 }
8270
8271 /* Probing */
8272
8273 static bool __pure __init tpacpi_is_fw_digit(const char c)
8274 {
8275 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8276 }
8277
8278 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8279 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8280 const char t)
8281 {
8282 return s && strlen(s) >= 8 &&
8283 tpacpi_is_fw_digit(s[0]) &&
8284 tpacpi_is_fw_digit(s[1]) &&
8285 s[2] == t && s[3] == 'T' &&
8286 tpacpi_is_fw_digit(s[4]) &&
8287 tpacpi_is_fw_digit(s[5]) &&
8288 s[6] == 'W' && s[7] == 'W';
8289 }
8290
8291 /* returns 0 - probe ok, or < 0 - probe error.
8292 * Probe ok doesn't mean thinkpad found.
8293 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8294 static int __must_check __init get_thinkpad_model_data(
8295 struct thinkpad_id_data *tp)
8296 {
8297 const struct dmi_device *dev = NULL;
8298 char ec_fw_string[18];
8299 char const *s;
8300
8301 if (!tp)
8302 return -EINVAL;
8303
8304 memset(tp, 0, sizeof(*tp));
8305
8306 if (dmi_name_in_vendors("IBM"))
8307 tp->vendor = PCI_VENDOR_ID_IBM;
8308 else if (dmi_name_in_vendors("LENOVO"))
8309 tp->vendor = PCI_VENDOR_ID_LENOVO;
8310 else
8311 return 0;
8312
8313 s = dmi_get_system_info(DMI_BIOS_VERSION);
8314 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8315 if (s && !tp->bios_version_str)
8316 return -ENOMEM;
8317
8318 /* Really ancient ThinkPad 240X will fail this, which is fine */
8319 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8320 return 0;
8321
8322 tp->bios_model = tp->bios_version_str[0]
8323 | (tp->bios_version_str[1] << 8);
8324 tp->bios_release = (tp->bios_version_str[4] << 8)
8325 | tp->bios_version_str[5];
8326
8327 /*
8328 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8329 * X32 or newer, all Z series; Some models must have an
8330 * up-to-date BIOS or they will not be detected.
8331 *
8332 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8333 */
8334 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8335 if (sscanf(dev->name,
8336 "IBM ThinkPad Embedded Controller -[%17c",
8337 ec_fw_string) == 1) {
8338 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8339 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8340
8341 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8342 if (!tp->ec_version_str)
8343 return -ENOMEM;
8344
8345 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8346 tp->ec_model = ec_fw_string[0]
8347 | (ec_fw_string[1] << 8);
8348 tp->ec_release = (ec_fw_string[4] << 8)
8349 | ec_fw_string[5];
8350 } else {
8351 printk(TPACPI_NOTICE
8352 "ThinkPad firmware release %s "
8353 "doesn't match the known patterns\n",
8354 ec_fw_string);
8355 printk(TPACPI_NOTICE
8356 "please report this to %s\n",
8357 TPACPI_MAIL);
8358 }
8359 break;
8360 }
8361 }
8362
8363 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8364 if (s && !strnicmp(s, "ThinkPad", 8)) {
8365 tp->model_str = kstrdup(s, GFP_KERNEL);
8366 if (!tp->model_str)
8367 return -ENOMEM;
8368 }
8369
8370 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8371 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8372 if (s && !tp->nummodel_str)
8373 return -ENOMEM;
8374
8375 return 0;
8376 }
8377
8378 static int __init probe_for_thinkpad(void)
8379 {
8380 int is_thinkpad;
8381
8382 if (acpi_disabled)
8383 return -ENODEV;
8384
8385 /*
8386 * Non-ancient models have better DMI tagging, but very old models
8387 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8388 */
8389 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8390 (thinkpad_id.ec_model != 0) ||
8391 tpacpi_is_fw_known();
8392
8393 /* ec is required because many other handles are relative to it */
8394 TPACPI_ACPIHANDLE_INIT(ec);
8395 if (!ec_handle) {
8396 if (is_thinkpad)
8397 printk(TPACPI_ERR
8398 "Not yet supported ThinkPad detected!\n");
8399 return -ENODEV;
8400 }
8401
8402 if (!is_thinkpad && !force_load)
8403 return -ENODEV;
8404
8405 return 0;
8406 }
8407
8408
8409 /* Module init, exit, parameters */
8410
8411 static struct ibm_init_struct ibms_init[] __initdata = {
8412 {
8413 .init = thinkpad_acpi_driver_init,
8414 .data = &thinkpad_acpi_driver_data,
8415 },
8416 {
8417 .init = hotkey_init,
8418 .data = &hotkey_driver_data,
8419 },
8420 {
8421 .init = bluetooth_init,
8422 .data = &bluetooth_driver_data,
8423 },
8424 {
8425 .init = wan_init,
8426 .data = &wan_driver_data,
8427 },
8428 {
8429 .init = uwb_init,
8430 .data = &uwb_driver_data,
8431 },
8432 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8433 {
8434 .init = video_init,
8435 .data = &video_driver_data,
8436 },
8437 #endif
8438 {
8439 .init = light_init,
8440 .data = &light_driver_data,
8441 },
8442 {
8443 .init = cmos_init,
8444 .data = &cmos_driver_data,
8445 },
8446 {
8447 .init = led_init,
8448 .data = &led_driver_data,
8449 },
8450 {
8451 .init = beep_init,
8452 .data = &beep_driver_data,
8453 },
8454 {
8455 .init = thermal_init,
8456 .data = &thermal_driver_data,
8457 },
8458 {
8459 .data = &ecdump_driver_data,
8460 },
8461 {
8462 .init = brightness_init,
8463 .data = &brightness_driver_data,
8464 },
8465 {
8466 .init = volume_init,
8467 .data = &volume_driver_data,
8468 },
8469 {
8470 .init = fan_init,
8471 .data = &fan_driver_data,
8472 },
8473 };
8474
8475 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8476 {
8477 unsigned int i;
8478 struct ibm_struct *ibm;
8479
8480 if (!kp || !kp->name || !val)
8481 return -EINVAL;
8482
8483 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8484 ibm = ibms_init[i].data;
8485 WARN_ON(ibm == NULL);
8486
8487 if (!ibm || !ibm->name)
8488 continue;
8489
8490 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8491 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8492 return -ENOSPC;
8493 strcpy(ibms_init[i].param, val);
8494 strcat(ibms_init[i].param, ",");
8495 return 0;
8496 }
8497 }
8498
8499 return -EINVAL;
8500 }
8501
8502 module_param(experimental, int, 0444);
8503 MODULE_PARM_DESC(experimental,
8504 "Enables experimental features when non-zero");
8505
8506 module_param_named(debug, dbg_level, uint, 0);
8507 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8508
8509 module_param(force_load, bool, 0444);
8510 MODULE_PARM_DESC(force_load,
8511 "Attempts to load the driver even on a "
8512 "mis-identified ThinkPad when true");
8513
8514 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8515 MODULE_PARM_DESC(fan_control,
8516 "Enables setting fan parameters features when true");
8517
8518 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8519 MODULE_PARM_DESC(brightness_mode,
8520 "Selects brightness control strategy: "
8521 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8522
8523 module_param(brightness_enable, uint, 0444);
8524 MODULE_PARM_DESC(brightness_enable,
8525 "Enables backlight control when 1, disables when 0");
8526
8527 module_param(hotkey_report_mode, uint, 0444);
8528 MODULE_PARM_DESC(hotkey_report_mode,
8529 "used for backwards compatibility with userspace, "
8530 "see documentation");
8531
8532 module_param_named(volume_mode, volume_mode, uint, 0444);
8533 MODULE_PARM_DESC(volume_mode,
8534 "Selects volume control strategy: "
8535 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8536
8537 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8538 MODULE_PARM_DESC(volume_capabilities,
8539 "Selects the mixer capabilites: "
8540 "0=auto, 1=volume and mute, 2=mute only");
8541
8542 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8543 MODULE_PARM_DESC(volume_control,
8544 "Enables software override for the console audio "
8545 "control when true");
8546
8547 #define TPACPI_PARAM(feature) \
8548 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8549 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8550 "at module load, see documentation")
8551
8552 TPACPI_PARAM(hotkey);
8553 TPACPI_PARAM(bluetooth);
8554 TPACPI_PARAM(video);
8555 TPACPI_PARAM(light);
8556 TPACPI_PARAM(cmos);
8557 TPACPI_PARAM(led);
8558 TPACPI_PARAM(beep);
8559 TPACPI_PARAM(ecdump);
8560 TPACPI_PARAM(brightness);
8561 TPACPI_PARAM(volume);
8562 TPACPI_PARAM(fan);
8563
8564 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8565 module_param(dbg_wlswemul, uint, 0444);
8566 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8567 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8568 MODULE_PARM_DESC(wlsw_state,
8569 "Initial state of the emulated WLSW switch");
8570
8571 module_param(dbg_bluetoothemul, uint, 0444);
8572 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8573 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8574 MODULE_PARM_DESC(bluetooth_state,
8575 "Initial state of the emulated bluetooth switch");
8576
8577 module_param(dbg_wwanemul, uint, 0444);
8578 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8579 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8580 MODULE_PARM_DESC(wwan_state,
8581 "Initial state of the emulated WWAN switch");
8582
8583 module_param(dbg_uwbemul, uint, 0444);
8584 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8585 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8586 MODULE_PARM_DESC(uwb_state,
8587 "Initial state of the emulated UWB switch");
8588 #endif
8589
8590 static void thinkpad_acpi_module_exit(void)
8591 {
8592 struct ibm_struct *ibm, *itmp;
8593
8594 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8595
8596 list_for_each_entry_safe_reverse(ibm, itmp,
8597 &tpacpi_all_drivers,
8598 all_drivers) {
8599 ibm_exit(ibm);
8600 }
8601
8602 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8603
8604 if (tpacpi_inputdev) {
8605 if (tp_features.input_device_registered)
8606 input_unregister_device(tpacpi_inputdev);
8607 else
8608 input_free_device(tpacpi_inputdev);
8609 }
8610
8611 if (tpacpi_hwmon)
8612 hwmon_device_unregister(tpacpi_hwmon);
8613
8614 if (tp_features.sensors_pdev_attrs_registered)
8615 device_remove_file(&tpacpi_sensors_pdev->dev,
8616 &dev_attr_thinkpad_acpi_pdev_name);
8617 if (tpacpi_sensors_pdev)
8618 platform_device_unregister(tpacpi_sensors_pdev);
8619 if (tpacpi_pdev)
8620 platform_device_unregister(tpacpi_pdev);
8621
8622 if (tp_features.sensors_pdrv_attrs_registered)
8623 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8624 if (tp_features.platform_drv_attrs_registered)
8625 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8626
8627 if (tp_features.sensors_pdrv_registered)
8628 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8629
8630 if (tp_features.platform_drv_registered)
8631 platform_driver_unregister(&tpacpi_pdriver);
8632
8633 if (proc_dir)
8634 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8635
8636 if (tpacpi_wq)
8637 destroy_workqueue(tpacpi_wq);
8638
8639 kfree(thinkpad_id.bios_version_str);
8640 kfree(thinkpad_id.ec_version_str);
8641 kfree(thinkpad_id.model_str);
8642 }
8643
8644
8645 static int __init thinkpad_acpi_module_init(void)
8646 {
8647 int ret, i;
8648
8649 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8650
8651 /* Parameter checking */
8652 if (hotkey_report_mode > 2)
8653 return -EINVAL;
8654
8655 /* Driver-level probe */
8656
8657 ret = get_thinkpad_model_data(&thinkpad_id);
8658 if (ret) {
8659 printk(TPACPI_ERR
8660 "unable to get DMI data: %d\n", ret);
8661 thinkpad_acpi_module_exit();
8662 return ret;
8663 }
8664 ret = probe_for_thinkpad();
8665 if (ret) {
8666 thinkpad_acpi_module_exit();
8667 return ret;
8668 }
8669
8670 /* Driver initialization */
8671
8672 TPACPI_ACPIHANDLE_INIT(ecrd);
8673 TPACPI_ACPIHANDLE_INIT(ecwr);
8674
8675 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8676 if (!tpacpi_wq) {
8677 thinkpad_acpi_module_exit();
8678 return -ENOMEM;
8679 }
8680
8681 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8682 if (!proc_dir) {
8683 printk(TPACPI_ERR
8684 "unable to create proc dir " TPACPI_PROC_DIR);
8685 thinkpad_acpi_module_exit();
8686 return -ENODEV;
8687 }
8688
8689 ret = platform_driver_register(&tpacpi_pdriver);
8690 if (ret) {
8691 printk(TPACPI_ERR
8692 "unable to register main platform driver\n");
8693 thinkpad_acpi_module_exit();
8694 return ret;
8695 }
8696 tp_features.platform_drv_registered = 1;
8697
8698 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8699 if (ret) {
8700 printk(TPACPI_ERR
8701 "unable to register hwmon platform driver\n");
8702 thinkpad_acpi_module_exit();
8703 return ret;
8704 }
8705 tp_features.sensors_pdrv_registered = 1;
8706
8707 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8708 if (!ret) {
8709 tp_features.platform_drv_attrs_registered = 1;
8710 ret = tpacpi_create_driver_attributes(
8711 &tpacpi_hwmon_pdriver.driver);
8712 }
8713 if (ret) {
8714 printk(TPACPI_ERR
8715 "unable to create sysfs driver attributes\n");
8716 thinkpad_acpi_module_exit();
8717 return ret;
8718 }
8719 tp_features.sensors_pdrv_attrs_registered = 1;
8720
8721
8722 /* Device initialization */
8723 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8724 NULL, 0);
8725 if (IS_ERR(tpacpi_pdev)) {
8726 ret = PTR_ERR(tpacpi_pdev);
8727 tpacpi_pdev = NULL;
8728 printk(TPACPI_ERR "unable to register platform device\n");
8729 thinkpad_acpi_module_exit();
8730 return ret;
8731 }
8732 tpacpi_sensors_pdev = platform_device_register_simple(
8733 TPACPI_HWMON_DRVR_NAME,
8734 -1, NULL, 0);
8735 if (IS_ERR(tpacpi_sensors_pdev)) {
8736 ret = PTR_ERR(tpacpi_sensors_pdev);
8737 tpacpi_sensors_pdev = NULL;
8738 printk(TPACPI_ERR
8739 "unable to register hwmon platform device\n");
8740 thinkpad_acpi_module_exit();
8741 return ret;
8742 }
8743 ret = device_create_file(&tpacpi_sensors_pdev->dev,
8744 &dev_attr_thinkpad_acpi_pdev_name);
8745 if (ret) {
8746 printk(TPACPI_ERR
8747 "unable to create sysfs hwmon device attributes\n");
8748 thinkpad_acpi_module_exit();
8749 return ret;
8750 }
8751 tp_features.sensors_pdev_attrs_registered = 1;
8752 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8753 if (IS_ERR(tpacpi_hwmon)) {
8754 ret = PTR_ERR(tpacpi_hwmon);
8755 tpacpi_hwmon = NULL;
8756 printk(TPACPI_ERR "unable to register hwmon device\n");
8757 thinkpad_acpi_module_exit();
8758 return ret;
8759 }
8760 mutex_init(&tpacpi_inputdev_send_mutex);
8761 tpacpi_inputdev = input_allocate_device();
8762 if (!tpacpi_inputdev) {
8763 printk(TPACPI_ERR "unable to allocate input device\n");
8764 thinkpad_acpi_module_exit();
8765 return -ENOMEM;
8766 } else {
8767 /* Prepare input device, but don't register */
8768 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8769 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8770 tpacpi_inputdev->id.bustype = BUS_HOST;
8771 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8772 thinkpad_id.vendor :
8773 PCI_VENDOR_ID_IBM;
8774 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8775 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8776 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
8777 }
8778 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8779 ret = ibm_init(&ibms_init[i]);
8780 if (ret >= 0 && *ibms_init[i].param)
8781 ret = ibms_init[i].data->write(ibms_init[i].param);
8782 if (ret < 0) {
8783 thinkpad_acpi_module_exit();
8784 return ret;
8785 }
8786 }
8787 ret = input_register_device(tpacpi_inputdev);
8788 if (ret < 0) {
8789 printk(TPACPI_ERR "unable to register input device\n");
8790 thinkpad_acpi_module_exit();
8791 return ret;
8792 } else {
8793 tp_features.input_device_registered = 1;
8794 }
8795
8796 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8797 return 0;
8798 }
8799
8800 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8801
8802 /*
8803 * This will autoload the driver in almost every ThinkPad
8804 * in widespread use.
8805 *
8806 * Only _VERY_ old models, like the 240, 240x and 570 lack
8807 * the HKEY event interface.
8808 */
8809 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8810
8811 /*
8812 * DMI matching for module autoloading
8813 *
8814 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8815 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8816 *
8817 * Only models listed in thinkwiki will be supported, so add yours
8818 * if it is not there yet.
8819 */
8820 #define IBM_BIOS_MODULE_ALIAS(__type) \
8821 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8822
8823 /* Ancient thinkpad BIOSes have to be identified by
8824 * BIOS type or model number, and there are far less
8825 * BIOS types than model numbers... */
8826 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
8827
8828 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8829 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8830 MODULE_DESCRIPTION(TPACPI_DESC);
8831 MODULE_VERSION(TPACPI_VERSION);
8832 MODULE_LICENSE("GPL");
8833
8834 module_init(thinkpad_acpi_module_init);
8835 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree