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thinkpad-acpi: log temperatures on termal alarm (v2)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blob6023f5b86b5c20d8af7fdb5b4df4dd3fb8ade788
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 0x020600
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
242 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
243 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
244 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
245
246
247 /****************************************************************************
248 * Driver-wide structs and misc. variables
249 */
250
251 struct ibm_struct;
252
253 struct tp_acpi_drv_struct {
254 const struct acpi_device_id *hid;
255 struct acpi_driver *driver;
256
257 void (*notify) (struct ibm_struct *, u32);
258 acpi_handle *handle;
259 u32 type;
260 struct acpi_device *device;
261 };
262
263 struct ibm_struct {
264 char *name;
265
266 int (*read) (char *);
267 int (*write) (char *);
268 void (*exit) (void);
269 void (*resume) (void);
270 void (*suspend) (pm_message_t state);
271 void (*shutdown) (void);
272
273 struct list_head all_drivers;
274
275 struct tp_acpi_drv_struct *acpi;
276
277 struct {
278 u8 acpi_driver_registered:1;
279 u8 acpi_notify_installed:1;
280 u8 proc_created:1;
281 u8 init_called:1;
282 u8 experimental:1;
283 } flags;
284 };
285
286 struct ibm_init_struct {
287 char param[32];
288
289 int (*init) (struct ibm_init_struct *);
290 struct ibm_struct *data;
291 };
292
293 static struct {
294 u32 bluetooth:1;
295 u32 hotkey:1;
296 u32 hotkey_mask:1;
297 u32 hotkey_wlsw:1;
298 u32 hotkey_tablet:1;
299 u32 light:1;
300 u32 light_status:1;
301 u32 bright_16levels:1;
302 u32 bright_acpimode:1;
303 u32 wan:1;
304 u32 uwb:1;
305 u32 fan_ctrl_status_undef:1;
306 u32 second_fan:1;
307 u32 beep_needs_two_args:1;
308 u32 input_device_registered:1;
309 u32 platform_drv_registered:1;
310 u32 platform_drv_attrs_registered:1;
311 u32 sensors_pdrv_registered:1;
312 u32 sensors_pdrv_attrs_registered:1;
313 u32 sensors_pdev_attrs_registered:1;
314 u32 hotkey_poll_active:1;
315 } tp_features;
316
317 static struct {
318 u16 hotkey_mask_ff:1;
319 } tp_warned;
320
321 struct thinkpad_id_data {
322 unsigned int vendor; /* ThinkPad vendor:
323 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
324
325 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
326 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
327
328 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
329 u16 ec_model;
330 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
331 u16 ec_release;
332
333 char *model_str; /* ThinkPad T43 */
334 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
335 };
336 static struct thinkpad_id_data thinkpad_id;
337
338 static enum {
339 TPACPI_LIFE_INIT = 0,
340 TPACPI_LIFE_RUNNING,
341 TPACPI_LIFE_EXITING,
342 } tpacpi_lifecycle;
343
344 static int experimental;
345 static u32 dbg_level;
346
347 static struct workqueue_struct *tpacpi_wq;
348
349 enum led_status_t {
350 TPACPI_LED_OFF = 0,
351 TPACPI_LED_ON,
352 TPACPI_LED_BLINK,
353 };
354
355 /* Special LED class that can defer work */
356 struct tpacpi_led_classdev {
357 struct led_classdev led_classdev;
358 struct work_struct work;
359 enum led_status_t new_state;
360 unsigned int led;
361 };
362
363 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
364 static int dbg_wlswemul;
365 static int tpacpi_wlsw_emulstate;
366 static int dbg_bluetoothemul;
367 static int tpacpi_bluetooth_emulstate;
368 static int dbg_wwanemul;
369 static int tpacpi_wwan_emulstate;
370 static int dbg_uwbemul;
371 static int tpacpi_uwb_emulstate;
372 #endif
373
374
375 /*************************************************************************
376 * Debugging helpers
377 */
378
379 #define dbg_printk(a_dbg_level, format, arg...) \
380 do { if (dbg_level & (a_dbg_level)) \
381 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
382 } while (0)
383
384 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
385 #define vdbg_printk dbg_printk
386 static const char *str_supported(int is_supported);
387 #else
388 #define vdbg_printk(a_dbg_level, format, arg...) \
389 do { } while (0)
390 #endif
391
392 static void tpacpi_log_usertask(const char * const what)
393 {
394 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
395 what, task_tgid_vnr(current));
396 }
397
398 #define tpacpi_disclose_usertask(what, format, arg...) \
399 do { \
400 if (unlikely( \
401 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
402 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
403 printk(TPACPI_DEBUG "%s: PID %d: " format, \
404 what, task_tgid_vnr(current), ## arg); \
405 } \
406 } while (0)
407
408 /*
409 * Quirk handling helpers
410 *
411 * ThinkPad IDs and versions seen in the field so far
412 * are two-characters from the set [0-9A-Z], i.e. base 36.
413 *
414 * We use values well outside that range as specials.
415 */
416
417 #define TPACPI_MATCH_ANY 0xffffU
418 #define TPACPI_MATCH_UNKNOWN 0U
419
420 /* TPID('1', 'Y') == 0x5931 */
421 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
422
423 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
424 { .vendor = PCI_VENDOR_ID_IBM, \
425 .bios = TPID(__id1, __id2), \
426 .ec = TPACPI_MATCH_ANY, \
427 .quirks = (__quirk) }
428
429 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
430 { .vendor = PCI_VENDOR_ID_LENOVO, \
431 .bios = TPID(__id1, __id2), \
432 .ec = TPACPI_MATCH_ANY, \
433 .quirks = (__quirk) }
434
435 struct tpacpi_quirk {
436 unsigned int vendor;
437 u16 bios;
438 u16 ec;
439 unsigned long quirks;
440 };
441
442 /**
443 * tpacpi_check_quirks() - search BIOS/EC version on a list
444 * @qlist: array of &struct tpacpi_quirk
445 * @qlist_size: number of elements in @qlist
446 *
447 * Iterates over a quirks list until one is found that matches the
448 * ThinkPad's vendor, BIOS and EC model.
449 *
450 * Returns 0 if nothing matches, otherwise returns the quirks field of
451 * the matching &struct tpacpi_quirk entry.
452 *
453 * The match criteria is: vendor, ec and bios much match.
454 */
455 static unsigned long __init tpacpi_check_quirks(
456 const struct tpacpi_quirk *qlist,
457 unsigned int qlist_size)
458 {
459 while (qlist_size) {
460 if ((qlist->vendor == thinkpad_id.vendor ||
461 qlist->vendor == TPACPI_MATCH_ANY) &&
462 (qlist->bios == thinkpad_id.bios_model ||
463 qlist->bios == TPACPI_MATCH_ANY) &&
464 (qlist->ec == thinkpad_id.ec_model ||
465 qlist->ec == TPACPI_MATCH_ANY))
466 return qlist->quirks;
467
468 qlist_size--;
469 qlist++;
470 }
471 return 0;
472 }
473
474
475 /****************************************************************************
476 ****************************************************************************
477 *
478 * ACPI Helpers and device model
479 *
480 ****************************************************************************
481 ****************************************************************************/
482
483 /*************************************************************************
484 * ACPI basic handles
485 */
486
487 static acpi_handle root_handle;
488
489 #define TPACPI_HANDLE(object, parent, paths...) \
490 static acpi_handle object##_handle; \
491 static acpi_handle *object##_parent = &parent##_handle; \
492 static char *object##_path; \
493 static char *object##_paths[] = { paths }
494
495 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
496 "\\_SB.PCI.ISA.EC", /* 570 */
497 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
498 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
499 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
500 "\\_SB.PCI0.ICH3.EC0", /* R31 */
501 "\\_SB.PCI0.LPC.EC", /* all others */
502 );
503
504 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
505 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
506
507 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
508 /* T4x, X31, X40 */
509 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
510 "\\CMS", /* R40, R40e */
511 ); /* all others */
512
513 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
514 "^HKEY", /* R30, R31 */
515 "HKEY", /* all others */
516 ); /* 570 */
517
518 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
519 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
520 "\\_SB.PCI0.VID0", /* 770e */
521 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
522 "\\_SB.PCI0.AGP.VID", /* all others */
523 ); /* R30, R31 */
524
525
526 /*************************************************************************
527 * ACPI helpers
528 */
529
530 static int acpi_evalf(acpi_handle handle,
531 void *res, char *method, char *fmt, ...)
532 {
533 char *fmt0 = fmt;
534 struct acpi_object_list params;
535 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
536 struct acpi_buffer result, *resultp;
537 union acpi_object out_obj;
538 acpi_status status;
539 va_list ap;
540 char res_type;
541 int success;
542 int quiet;
543
544 if (!*fmt) {
545 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
546 return 0;
547 }
548
549 if (*fmt == 'q') {
550 quiet = 1;
551 fmt++;
552 } else
553 quiet = 0;
554
555 res_type = *(fmt++);
556
557 params.count = 0;
558 params.pointer = &in_objs[0];
559
560 va_start(ap, fmt);
561 while (*fmt) {
562 char c = *(fmt++);
563 switch (c) {
564 case 'd': /* int */
565 in_objs[params.count].integer.value = va_arg(ap, int);
566 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
567 break;
568 /* add more types as needed */
569 default:
570 printk(TPACPI_ERR "acpi_evalf() called "
571 "with invalid format character '%c'\n", c);
572 return 0;
573 }
574 }
575 va_end(ap);
576
577 if (res_type != 'v') {
578 result.length = sizeof(out_obj);
579 result.pointer = &out_obj;
580 resultp = &result;
581 } else
582 resultp = NULL;
583
584 status = acpi_evaluate_object(handle, method, &params, resultp);
585
586 switch (res_type) {
587 case 'd': /* int */
588 if (res)
589 *(int *)res = out_obj.integer.value;
590 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
591 break;
592 case 'v': /* void */
593 success = status == AE_OK;
594 break;
595 /* add more types as needed */
596 default:
597 printk(TPACPI_ERR "acpi_evalf() called "
598 "with invalid format character '%c'\n", res_type);
599 return 0;
600 }
601
602 if (!success && !quiet)
603 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
604 method, fmt0, status);
605
606 return success;
607 }
608
609 static int acpi_ec_read(int i, u8 *p)
610 {
611 int v;
612
613 if (ecrd_handle) {
614 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
615 return 0;
616 *p = v;
617 } else {
618 if (ec_read(i, p) < 0)
619 return 0;
620 }
621
622 return 1;
623 }
624
625 static int acpi_ec_write(int i, u8 v)
626 {
627 if (ecwr_handle) {
628 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
629 return 0;
630 } else {
631 if (ec_write(i, v) < 0)
632 return 0;
633 }
634
635 return 1;
636 }
637
638 static int issue_thinkpad_cmos_command(int cmos_cmd)
639 {
640 if (!cmos_handle)
641 return -ENXIO;
642
643 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
644 return -EIO;
645
646 return 0;
647 }
648
649 /*************************************************************************
650 * ACPI device model
651 */
652
653 #define TPACPI_ACPIHANDLE_INIT(object) \
654 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
655 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
656
657 static void drv_acpi_handle_init(char *name,
658 acpi_handle *handle, acpi_handle parent,
659 char **paths, int num_paths, char **path)
660 {
661 int i;
662 acpi_status status;
663
664 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
665 name);
666
667 for (i = 0; i < num_paths; i++) {
668 status = acpi_get_handle(parent, paths[i], handle);
669 if (ACPI_SUCCESS(status)) {
670 *path = paths[i];
671 dbg_printk(TPACPI_DBG_INIT,
672 "Found ACPI handle %s for %s\n",
673 *path, name);
674 return;
675 }
676 }
677
678 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
679 name);
680 *handle = NULL;
681 }
682
683 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
684 {
685 struct ibm_struct *ibm = data;
686
687 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
688 return;
689
690 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
691 return;
692
693 ibm->acpi->notify(ibm, event);
694 }
695
696 static int __init setup_acpi_notify(struct ibm_struct *ibm)
697 {
698 acpi_status status;
699 int rc;
700
701 BUG_ON(!ibm->acpi);
702
703 if (!*ibm->acpi->handle)
704 return 0;
705
706 vdbg_printk(TPACPI_DBG_INIT,
707 "setting up ACPI notify for %s\n", ibm->name);
708
709 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
710 if (rc < 0) {
711 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
712 ibm->name, rc);
713 return -ENODEV;
714 }
715
716 acpi_driver_data(ibm->acpi->device) = ibm;
717 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
718 TPACPI_ACPI_EVENT_PREFIX,
719 ibm->name);
720
721 status = acpi_install_notify_handler(*ibm->acpi->handle,
722 ibm->acpi->type, dispatch_acpi_notify, ibm);
723 if (ACPI_FAILURE(status)) {
724 if (status == AE_ALREADY_EXISTS) {
725 printk(TPACPI_NOTICE
726 "another device driver is already "
727 "handling %s events\n", ibm->name);
728 } else {
729 printk(TPACPI_ERR
730 "acpi_install_notify_handler(%s) failed: %d\n",
731 ibm->name, status);
732 }
733 return -ENODEV;
734 }
735 ibm->flags.acpi_notify_installed = 1;
736 return 0;
737 }
738
739 static int __init tpacpi_device_add(struct acpi_device *device)
740 {
741 return 0;
742 }
743
744 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
745 {
746 int rc;
747
748 dbg_printk(TPACPI_DBG_INIT,
749 "registering %s as an ACPI driver\n", ibm->name);
750
751 BUG_ON(!ibm->acpi);
752
753 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
754 if (!ibm->acpi->driver) {
755 printk(TPACPI_ERR
756 "failed to allocate memory for ibm->acpi->driver\n");
757 return -ENOMEM;
758 }
759
760 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
761 ibm->acpi->driver->ids = ibm->acpi->hid;
762
763 ibm->acpi->driver->ops.add = &tpacpi_device_add;
764
765 rc = acpi_bus_register_driver(ibm->acpi->driver);
766 if (rc < 0) {
767 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
768 ibm->name, rc);
769 kfree(ibm->acpi->driver);
770 ibm->acpi->driver = NULL;
771 } else if (!rc)
772 ibm->flags.acpi_driver_registered = 1;
773
774 return rc;
775 }
776
777
778 /****************************************************************************
779 ****************************************************************************
780 *
781 * Procfs Helpers
782 *
783 ****************************************************************************
784 ****************************************************************************/
785
786 static int dispatch_procfs_read(char *page, char **start, off_t off,
787 int count, int *eof, void *data)
788 {
789 struct ibm_struct *ibm = data;
790 int len;
791
792 if (!ibm || !ibm->read)
793 return -EINVAL;
794
795 len = ibm->read(page);
796 if (len < 0)
797 return len;
798
799 if (len <= off + count)
800 *eof = 1;
801 *start = page + off;
802 len -= off;
803 if (len > count)
804 len = count;
805 if (len < 0)
806 len = 0;
807
808 return len;
809 }
810
811 static int dispatch_procfs_write(struct file *file,
812 const char __user *userbuf,
813 unsigned long count, void *data)
814 {
815 struct ibm_struct *ibm = data;
816 char *kernbuf;
817 int ret;
818
819 if (!ibm || !ibm->write)
820 return -EINVAL;
821 if (count > PAGE_SIZE - 2)
822 return -EINVAL;
823
824 kernbuf = kmalloc(count + 2, GFP_KERNEL);
825 if (!kernbuf)
826 return -ENOMEM;
827
828 if (copy_from_user(kernbuf, userbuf, count)) {
829 kfree(kernbuf);
830 return -EFAULT;
831 }
832
833 kernbuf[count] = 0;
834 strcat(kernbuf, ",");
835 ret = ibm->write(kernbuf);
836 if (ret == 0)
837 ret = count;
838
839 kfree(kernbuf);
840
841 return ret;
842 }
843
844 static char *next_cmd(char **cmds)
845 {
846 char *start = *cmds;
847 char *end;
848
849 while ((end = strchr(start, ',')) && end == start)
850 start = end + 1;
851
852 if (!end)
853 return NULL;
854
855 *end = 0;
856 *cmds = end + 1;
857 return start;
858 }
859
860
861 /****************************************************************************
862 ****************************************************************************
863 *
864 * Device model: input, hwmon and platform
865 *
866 ****************************************************************************
867 ****************************************************************************/
868
869 static struct platform_device *tpacpi_pdev;
870 static struct platform_device *tpacpi_sensors_pdev;
871 static struct device *tpacpi_hwmon;
872 static struct input_dev *tpacpi_inputdev;
873 static struct mutex tpacpi_inputdev_send_mutex;
874 static LIST_HEAD(tpacpi_all_drivers);
875
876 static int tpacpi_suspend_handler(struct platform_device *pdev,
877 pm_message_t state)
878 {
879 struct ibm_struct *ibm, *itmp;
880
881 list_for_each_entry_safe(ibm, itmp,
882 &tpacpi_all_drivers,
883 all_drivers) {
884 if (ibm->suspend)
885 (ibm->suspend)(state);
886 }
887
888 return 0;
889 }
890
891 static int tpacpi_resume_handler(struct platform_device *pdev)
892 {
893 struct ibm_struct *ibm, *itmp;
894
895 list_for_each_entry_safe(ibm, itmp,
896 &tpacpi_all_drivers,
897 all_drivers) {
898 if (ibm->resume)
899 (ibm->resume)();
900 }
901
902 return 0;
903 }
904
905 static void tpacpi_shutdown_handler(struct platform_device *pdev)
906 {
907 struct ibm_struct *ibm, *itmp;
908
909 list_for_each_entry_safe(ibm, itmp,
910 &tpacpi_all_drivers,
911 all_drivers) {
912 if (ibm->shutdown)
913 (ibm->shutdown)();
914 }
915 }
916
917 static struct platform_driver tpacpi_pdriver = {
918 .driver = {
919 .name = TPACPI_DRVR_NAME,
920 .owner = THIS_MODULE,
921 },
922 .suspend = tpacpi_suspend_handler,
923 .resume = tpacpi_resume_handler,
924 .shutdown = tpacpi_shutdown_handler,
925 };
926
927 static struct platform_driver tpacpi_hwmon_pdriver = {
928 .driver = {
929 .name = TPACPI_HWMON_DRVR_NAME,
930 .owner = THIS_MODULE,
931 },
932 };
933
934 /*************************************************************************
935 * sysfs support helpers
936 */
937
938 struct attribute_set {
939 unsigned int members, max_members;
940 struct attribute_group group;
941 };
942
943 struct attribute_set_obj {
944 struct attribute_set s;
945 struct attribute *a;
946 } __attribute__((packed));
947
948 static struct attribute_set *create_attr_set(unsigned int max_members,
949 const char *name)
950 {
951 struct attribute_set_obj *sobj;
952
953 if (max_members == 0)
954 return NULL;
955
956 /* Allocates space for implicit NULL at the end too */
957 sobj = kzalloc(sizeof(struct attribute_set_obj) +
958 max_members * sizeof(struct attribute *),
959 GFP_KERNEL);
960 if (!sobj)
961 return NULL;
962 sobj->s.max_members = max_members;
963 sobj->s.group.attrs = &sobj->a;
964 sobj->s.group.name = name;
965
966 return &sobj->s;
967 }
968
969 #define destroy_attr_set(_set) \
970 kfree(_set);
971
972 /* not multi-threaded safe, use it in a single thread per set */
973 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
974 {
975 if (!s || !attr)
976 return -EINVAL;
977
978 if (s->members >= s->max_members)
979 return -ENOMEM;
980
981 s->group.attrs[s->members] = attr;
982 s->members++;
983
984 return 0;
985 }
986
987 static int add_many_to_attr_set(struct attribute_set *s,
988 struct attribute **attr,
989 unsigned int count)
990 {
991 int i, res;
992
993 for (i = 0; i < count; i++) {
994 res = add_to_attr_set(s, attr[i]);
995 if (res)
996 return res;
997 }
998
999 return 0;
1000 }
1001
1002 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1003 {
1004 sysfs_remove_group(kobj, &s->group);
1005 destroy_attr_set(s);
1006 }
1007
1008 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1009 sysfs_create_group(_kobj, &_attr_set->group)
1010
1011 static int parse_strtoul(const char *buf,
1012 unsigned long max, unsigned long *value)
1013 {
1014 char *endp;
1015
1016 while (*buf && isspace(*buf))
1017 buf++;
1018 *value = simple_strtoul(buf, &endp, 0);
1019 while (*endp && isspace(*endp))
1020 endp++;
1021 if (*endp || *value > max)
1022 return -EINVAL;
1023
1024 return 0;
1025 }
1026
1027 static void tpacpi_disable_brightness_delay(void)
1028 {
1029 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1030 printk(TPACPI_NOTICE
1031 "ACPI backlight control delay disabled\n");
1032 }
1033
1034 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1035 {
1036 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1037 union acpi_object *obj;
1038 int rc;
1039
1040 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1041 obj = (union acpi_object *)buffer.pointer;
1042 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1043 printk(TPACPI_ERR "Unknown _BCL data, "
1044 "please report this to %s\n", TPACPI_MAIL);
1045 rc = 0;
1046 } else {
1047 rc = obj->package.count;
1048 }
1049 } else {
1050 return 0;
1051 }
1052
1053 kfree(buffer.pointer);
1054 return rc;
1055 }
1056
1057 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1058 u32 lvl, void *context, void **rv)
1059 {
1060 char name[ACPI_PATH_SEGMENT_LENGTH];
1061 struct acpi_buffer buffer = { sizeof(name), &name };
1062
1063 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1064 !strncmp("_BCL", name, sizeof(name) - 1)) {
1065 BUG_ON(!rv || !*rv);
1066 **(int **)rv = tpacpi_query_bcl_levels(handle);
1067 return AE_CTRL_TERMINATE;
1068 } else {
1069 return AE_OK;
1070 }
1071 }
1072
1073 /*
1074 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1075 */
1076 static int __init tpacpi_check_std_acpi_brightness_support(void)
1077 {
1078 int status;
1079 int bcl_levels = 0;
1080 void *bcl_ptr = &bcl_levels;
1081
1082 if (!vid_handle) {
1083 TPACPI_ACPIHANDLE_INIT(vid);
1084 }
1085 if (!vid_handle)
1086 return 0;
1087
1088 /*
1089 * Search for a _BCL method, and execute it. This is safe on all
1090 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1091 * BIOS in ACPI backlight control mode. We do NOT have to care
1092 * about calling the _BCL method in an enabled video device, any
1093 * will do for our purposes.
1094 */
1095
1096 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1097 tpacpi_acpi_walk_find_bcl, NULL,
1098 &bcl_ptr);
1099
1100 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1101 tp_features.bright_acpimode = 1;
1102 return (bcl_levels - 2);
1103 }
1104
1105 return 0;
1106 }
1107
1108 static int __init tpacpi_new_rfkill(const unsigned int id,
1109 struct rfkill **rfk,
1110 const enum rfkill_type rfktype,
1111 const char *name,
1112 const bool set_default,
1113 int (*toggle_radio)(void *, enum rfkill_state),
1114 int (*get_state)(void *, enum rfkill_state *))
1115 {
1116 int res;
1117 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
1118
1119 res = get_state(NULL, &initial_state);
1120 if (res < 0) {
1121 printk(TPACPI_ERR
1122 "failed to read initial state for %s, error %d; "
1123 "will turn radio off\n", name, res);
1124 } else if (set_default) {
1125 /* try to set the initial state as the default for the rfkill
1126 * type, since we ask the firmware to preserve it across S5 in
1127 * NVRAM */
1128 if (rfkill_set_default(rfktype,
1129 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1130 RFKILL_STATE_UNBLOCKED :
1131 RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
1132 vdbg_printk(TPACPI_DBG_RFKILL,
1133 "Default state for %s cannot be changed\n",
1134 name);
1135 }
1136
1137 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1138 if (!*rfk) {
1139 printk(TPACPI_ERR
1140 "failed to allocate memory for rfkill class\n");
1141 return -ENOMEM;
1142 }
1143
1144 (*rfk)->name = name;
1145 (*rfk)->get_state = get_state;
1146 (*rfk)->toggle_radio = toggle_radio;
1147 (*rfk)->state = initial_state;
1148
1149 res = rfkill_register(*rfk);
1150 if (res < 0) {
1151 printk(TPACPI_ERR
1152 "failed to register %s rfkill switch: %d\n",
1153 name, res);
1154 rfkill_free(*rfk);
1155 *rfk = NULL;
1156 return res;
1157 }
1158
1159 return 0;
1160 }
1161
1162 static void printk_deprecated_attribute(const char * const what,
1163 const char * const details)
1164 {
1165 tpacpi_log_usertask("deprecated sysfs attribute");
1166 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1167 "will be removed. %s\n",
1168 what, details);
1169 }
1170
1171 static void printk_deprecated_rfkill_attribute(const char * const what)
1172 {
1173 printk_deprecated_attribute(what,
1174 "Please switch to generic rfkill before year 2010");
1175 }
1176
1177 /*************************************************************************
1178 * thinkpad-acpi driver attributes
1179 */
1180
1181 /* interface_version --------------------------------------------------- */
1182 static ssize_t tpacpi_driver_interface_version_show(
1183 struct device_driver *drv,
1184 char *buf)
1185 {
1186 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1187 }
1188
1189 static DRIVER_ATTR(interface_version, S_IRUGO,
1190 tpacpi_driver_interface_version_show, NULL);
1191
1192 /* debug_level --------------------------------------------------------- */
1193 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1194 char *buf)
1195 {
1196 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1197 }
1198
1199 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1200 const char *buf, size_t count)
1201 {
1202 unsigned long t;
1203
1204 if (parse_strtoul(buf, 0xffff, &t))
1205 return -EINVAL;
1206
1207 dbg_level = t;
1208
1209 return count;
1210 }
1211
1212 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1213 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1214
1215 /* version ------------------------------------------------------------- */
1216 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1217 char *buf)
1218 {
1219 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1220 TPACPI_DESC, TPACPI_VERSION);
1221 }
1222
1223 static DRIVER_ATTR(version, S_IRUGO,
1224 tpacpi_driver_version_show, NULL);
1225
1226 /* --------------------------------------------------------------------- */
1227
1228 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1229
1230 static void tpacpi_send_radiosw_update(void);
1231
1232 /* wlsw_emulstate ------------------------------------------------------ */
1233 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1234 char *buf)
1235 {
1236 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1237 }
1238
1239 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1240 const char *buf, size_t count)
1241 {
1242 unsigned long t;
1243
1244 if (parse_strtoul(buf, 1, &t))
1245 return -EINVAL;
1246
1247 if (tpacpi_wlsw_emulstate != t) {
1248 tpacpi_wlsw_emulstate = !!t;
1249 tpacpi_send_radiosw_update();
1250 } else
1251 tpacpi_wlsw_emulstate = !!t;
1252
1253 return count;
1254 }
1255
1256 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1257 tpacpi_driver_wlsw_emulstate_show,
1258 tpacpi_driver_wlsw_emulstate_store);
1259
1260 /* bluetooth_emulstate ------------------------------------------------- */
1261 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1262 struct device_driver *drv,
1263 char *buf)
1264 {
1265 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1266 }
1267
1268 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1269 struct device_driver *drv,
1270 const char *buf, size_t count)
1271 {
1272 unsigned long t;
1273
1274 if (parse_strtoul(buf, 1, &t))
1275 return -EINVAL;
1276
1277 tpacpi_bluetooth_emulstate = !!t;
1278
1279 return count;
1280 }
1281
1282 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1283 tpacpi_driver_bluetooth_emulstate_show,
1284 tpacpi_driver_bluetooth_emulstate_store);
1285
1286 /* wwan_emulstate ------------------------------------------------- */
1287 static ssize_t tpacpi_driver_wwan_emulstate_show(
1288 struct device_driver *drv,
1289 char *buf)
1290 {
1291 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1292 }
1293
1294 static ssize_t tpacpi_driver_wwan_emulstate_store(
1295 struct device_driver *drv,
1296 const char *buf, size_t count)
1297 {
1298 unsigned long t;
1299
1300 if (parse_strtoul(buf, 1, &t))
1301 return -EINVAL;
1302
1303 tpacpi_wwan_emulstate = !!t;
1304
1305 return count;
1306 }
1307
1308 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1309 tpacpi_driver_wwan_emulstate_show,
1310 tpacpi_driver_wwan_emulstate_store);
1311
1312 /* uwb_emulstate ------------------------------------------------- */
1313 static ssize_t tpacpi_driver_uwb_emulstate_show(
1314 struct device_driver *drv,
1315 char *buf)
1316 {
1317 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1318 }
1319
1320 static ssize_t tpacpi_driver_uwb_emulstate_store(
1321 struct device_driver *drv,
1322 const char *buf, size_t count)
1323 {
1324 unsigned long t;
1325
1326 if (parse_strtoul(buf, 1, &t))
1327 return -EINVAL;
1328
1329 tpacpi_uwb_emulstate = !!t;
1330
1331 return count;
1332 }
1333
1334 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1335 tpacpi_driver_uwb_emulstate_show,
1336 tpacpi_driver_uwb_emulstate_store);
1337 #endif
1338
1339 /* --------------------------------------------------------------------- */
1340
1341 static struct driver_attribute *tpacpi_driver_attributes[] = {
1342 &driver_attr_debug_level, &driver_attr_version,
1343 &driver_attr_interface_version,
1344 };
1345
1346 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1347 {
1348 int i, res;
1349
1350 i = 0;
1351 res = 0;
1352 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1353 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1354 i++;
1355 }
1356
1357 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1358 if (!res && dbg_wlswemul)
1359 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1360 if (!res && dbg_bluetoothemul)
1361 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1362 if (!res && dbg_wwanemul)
1363 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1364 if (!res && dbg_uwbemul)
1365 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1366 #endif
1367
1368 return res;
1369 }
1370
1371 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1372 {
1373 int i;
1374
1375 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1376 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1377
1378 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1379 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1380 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1381 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1382 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1383 #endif
1384 }
1385
1386 /*************************************************************************
1387 * Firmware Data
1388 */
1389
1390 /*
1391 * Table of recommended minimum BIOS versions
1392 *
1393 * Reasons for listing:
1394 * 1. Stable BIOS, listed because the unknown ammount of
1395 * bugs and bad ACPI behaviour on older versions
1396 *
1397 * 2. BIOS or EC fw with known bugs that trigger on Linux
1398 *
1399 * 3. BIOS with known reduced functionality in older versions
1400 *
1401 * We recommend the latest BIOS and EC version.
1402 * We only support the latest BIOS and EC fw version as a rule.
1403 *
1404 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1405 * Information from users in ThinkWiki
1406 *
1407 * WARNING: we use this table also to detect that the machine is
1408 * a ThinkPad in some cases, so don't remove entries lightly.
1409 */
1410
1411 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1412 { .vendor = (__v), \
1413 .bios = TPID(__id1, __id2), \
1414 .ec = TPACPI_MATCH_ANY, \
1415 .quirks = TPACPI_MATCH_ANY << 16 \
1416 | (__bv1) << 8 | (__bv2) }
1417
1418 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1419 __eid, __ev1, __ev2) \
1420 { .vendor = (__v), \
1421 .bios = TPID(__bid1, __bid2), \
1422 .ec = __eid, \
1423 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1424 | (__bv1) << 8 | (__bv2) }
1425
1426 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1427 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1428
1429 /* Outdated IBM BIOSes often lack the EC id string */
1430 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1431 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1432 __bv1, __bv2, TPID(__id1, __id2), \
1433 __ev1, __ev2), \
1434 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1435 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1436 __ev1, __ev2)
1437
1438 /* Outdated IBM BIOSes often lack the EC id string */
1439 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1440 __eid1, __eid2, __ev1, __ev2) \
1441 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1442 __bv1, __bv2, TPID(__eid1, __eid2), \
1443 __ev1, __ev2), \
1444 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1445 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
1446 __ev1, __ev2)
1447
1448 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1449 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1450
1451 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1452 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1453 __bv1, __bv2, TPID(__id1, __id2), \
1454 __ev1, __ev2)
1455
1456 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1457 __eid1, __eid2, __ev1, __ev2) \
1458 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1459 __bv1, __bv2, TPID(__eid1, __eid2), \
1460 __ev1, __ev2)
1461
1462 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1463 /* Numeric models ------------------ */
1464 /* FW MODEL BIOS VERS */
1465 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1466 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1467 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1468 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1469 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1470 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1471 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1472 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1473 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1474
1475 /* A-series ------------------------- */
1476 /* FW MODEL BIOS VERS EC VERS */
1477 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1478 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1479 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1480 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1481 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1482 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1483 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1484 TPV_QI0('1', '3', '2', '0'), /* A22m */
1485 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1486 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1487 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1488
1489 /* G-series ------------------------- */
1490 /* FW MODEL BIOS VERS */
1491 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1492 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1493
1494 /* R-series, T-series --------------- */
1495 /* FW MODEL BIOS VERS EC VERS */
1496 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1497 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1498 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1499 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1500 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1501 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1502 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1503 T40/p, T41/p, T42/p (1) */
1504 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1505 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1506 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1507 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1508
1509 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1510 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1511 TPV_QI0('1', '6', '3', '2'), /* T22 */
1512 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1513 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1514 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1515
1516 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1517 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1518 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */
1519
1520 /* BIOS FW BIOS VERS EC FW EC VERS */
1521 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1522 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1523
1524 /* X-series ------------------------- */
1525 /* FW MODEL BIOS VERS EC VERS */
1526 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1527 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1528 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1529 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1530 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1531 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1532 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1533
1534 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */
1535 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */
1536
1537 /* (0) - older versions lack DMI EC fw string and functionality */
1538 /* (1) - older versions known to lack functionality */
1539 };
1540
1541 #undef TPV_QL1
1542 #undef TPV_QL0
1543 #undef TPV_QI2
1544 #undef TPV_QI1
1545 #undef TPV_QI0
1546 #undef TPV_Q_X
1547 #undef TPV_Q
1548
1549 static void __init tpacpi_check_outdated_fw(void)
1550 {
1551 unsigned long fwvers;
1552 u16 ec_version, bios_version;
1553
1554 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1555 ARRAY_SIZE(tpacpi_bios_version_qtable));
1556
1557 if (!fwvers)
1558 return;
1559
1560 bios_version = fwvers & 0xffffU;
1561 ec_version = (fwvers >> 16) & 0xffffU;
1562
1563 /* note that unknown versions are set to 0x0000 and we use that */
1564 if ((bios_version > thinkpad_id.bios_release) ||
1565 (ec_version > thinkpad_id.ec_release &&
1566 ec_version != TPACPI_MATCH_ANY)) {
1567 /*
1568 * The changelogs would let us track down the exact
1569 * reason, but it is just too much of a pain to track
1570 * it. We only list BIOSes that are either really
1571 * broken, or really stable to begin with, so it is
1572 * best if the user upgrades the firmware anyway.
1573 */
1574 printk(TPACPI_WARN
1575 "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1576 printk(TPACPI_WARN
1577 "WARNING: This firmware may be missing critical bug "
1578 "fixes and/or important features\n");
1579 }
1580 }
1581
1582 static bool __init tpacpi_is_fw_known(void)
1583 {
1584 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1585 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1586 }
1587
1588 /****************************************************************************
1589 ****************************************************************************
1590 *
1591 * Subdrivers
1592 *
1593 ****************************************************************************
1594 ****************************************************************************/
1595
1596 /*************************************************************************
1597 * thinkpad-acpi init subdriver
1598 */
1599
1600 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1601 {
1602 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1603 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1604
1605 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1606 (thinkpad_id.bios_version_str) ?
1607 thinkpad_id.bios_version_str : "unknown",
1608 (thinkpad_id.ec_version_str) ?
1609 thinkpad_id.ec_version_str : "unknown");
1610
1611 if (thinkpad_id.vendor && thinkpad_id.model_str)
1612 printk(TPACPI_INFO "%s %s, model %s\n",
1613 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1614 "IBM" : ((thinkpad_id.vendor ==
1615 PCI_VENDOR_ID_LENOVO) ?
1616 "Lenovo" : "Unknown vendor"),
1617 thinkpad_id.model_str,
1618 (thinkpad_id.nummodel_str) ?
1619 thinkpad_id.nummodel_str : "unknown");
1620
1621 tpacpi_check_outdated_fw();
1622 return 0;
1623 }
1624
1625 static int thinkpad_acpi_driver_read(char *p)
1626 {
1627 int len = 0;
1628
1629 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1630 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1631
1632 return len;
1633 }
1634
1635 static struct ibm_struct thinkpad_acpi_driver_data = {
1636 .name = "driver",
1637 .read = thinkpad_acpi_driver_read,
1638 };
1639
1640 /*************************************************************************
1641 * Hotkey subdriver
1642 */
1643
1644 /*
1645 * ThinkPad firmware event model
1646 *
1647 * The ThinkPad firmware has two main event interfaces: normal ACPI
1648 * notifications (which follow the ACPI standard), and a private event
1649 * interface.
1650 *
1651 * The private event interface also issues events for the hotkeys. As
1652 * the driver gained features, the event handling code ended up being
1653 * built around the hotkey subdriver. This will need to be refactored
1654 * to a more formal event API eventually.
1655 *
1656 * Some "hotkeys" are actually supposed to be used as event reports,
1657 * such as "brightness has changed", "volume has changed", depending on
1658 * the ThinkPad model and how the firmware is operating.
1659 *
1660 * Unlike other classes, hotkey-class events have mask/unmask control on
1661 * non-ancient firmware. However, how it behaves changes a lot with the
1662 * firmware model and version.
1663 */
1664
1665 enum { /* hot key scan codes (derived from ACPI DSDT) */
1666 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1667 TP_ACPI_HOTKEYSCAN_FNF2,
1668 TP_ACPI_HOTKEYSCAN_FNF3,
1669 TP_ACPI_HOTKEYSCAN_FNF4,
1670 TP_ACPI_HOTKEYSCAN_FNF5,
1671 TP_ACPI_HOTKEYSCAN_FNF6,
1672 TP_ACPI_HOTKEYSCAN_FNF7,
1673 TP_ACPI_HOTKEYSCAN_FNF8,
1674 TP_ACPI_HOTKEYSCAN_FNF9,
1675 TP_ACPI_HOTKEYSCAN_FNF10,
1676 TP_ACPI_HOTKEYSCAN_FNF11,
1677 TP_ACPI_HOTKEYSCAN_FNF12,
1678 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1679 TP_ACPI_HOTKEYSCAN_FNINSERT,
1680 TP_ACPI_HOTKEYSCAN_FNDELETE,
1681 TP_ACPI_HOTKEYSCAN_FNHOME,
1682 TP_ACPI_HOTKEYSCAN_FNEND,
1683 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1684 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1685 TP_ACPI_HOTKEYSCAN_FNSPACE,
1686 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1687 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1688 TP_ACPI_HOTKEYSCAN_MUTE,
1689 TP_ACPI_HOTKEYSCAN_THINKPAD,
1690 };
1691
1692 enum { /* Keys/events available through NVRAM polling */
1693 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1694 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1695 };
1696
1697 enum { /* Positions of some of the keys in hotkey masks */
1698 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1699 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1700 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1701 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1702 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1703 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1704 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1705 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1706 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1707 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1708 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1709 };
1710
1711 enum { /* NVRAM to ACPI HKEY group map */
1712 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1713 TP_ACPI_HKEY_ZOOM_MASK |
1714 TP_ACPI_HKEY_DISPSWTCH_MASK |
1715 TP_ACPI_HKEY_HIBERNATE_MASK,
1716 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1717 TP_ACPI_HKEY_BRGHTDWN_MASK,
1718 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1719 TP_ACPI_HKEY_VOLDWN_MASK |
1720 TP_ACPI_HKEY_MUTE_MASK,
1721 };
1722
1723 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1724 struct tp_nvram_state {
1725 u16 thinkpad_toggle:1;
1726 u16 zoom_toggle:1;
1727 u16 display_toggle:1;
1728 u16 thinklight_toggle:1;
1729 u16 hibernate_toggle:1;
1730 u16 displayexp_toggle:1;
1731 u16 display_state:1;
1732 u16 brightness_toggle:1;
1733 u16 volume_toggle:1;
1734 u16 mute:1;
1735
1736 u8 brightness_level;
1737 u8 volume_level;
1738 };
1739
1740 /* kthread for the hotkey poller */
1741 static struct task_struct *tpacpi_hotkey_task;
1742
1743 /* Acquired while the poller kthread is running, use to sync start/stop */
1744 static struct mutex hotkey_thread_mutex;
1745
1746 /*
1747 * Acquire mutex to write poller control variables as an
1748 * atomic block.
1749 *
1750 * Increment hotkey_config_change when changing them if you
1751 * want the kthread to forget old state.
1752 *
1753 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1754 */
1755 static struct mutex hotkey_thread_data_mutex;
1756 static unsigned int hotkey_config_change;
1757
1758 /*
1759 * hotkey poller control variables
1760 *
1761 * Must be atomic or readers will also need to acquire mutex
1762 *
1763 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1764 * should be used only when the changes need to be taken as
1765 * a block, OR when one needs to force the kthread to forget
1766 * old state.
1767 */
1768 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1769 static unsigned int hotkey_poll_freq = 10; /* Hz */
1770
1771 #define HOTKEY_CONFIG_CRITICAL_START \
1772 do { \
1773 mutex_lock(&hotkey_thread_data_mutex); \
1774 hotkey_config_change++; \
1775 } while (0);
1776 #define HOTKEY_CONFIG_CRITICAL_END \
1777 mutex_unlock(&hotkey_thread_data_mutex);
1778
1779 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1780
1781 #define hotkey_source_mask 0U
1782 #define HOTKEY_CONFIG_CRITICAL_START
1783 #define HOTKEY_CONFIG_CRITICAL_END
1784
1785 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1786
1787 static struct mutex hotkey_mutex;
1788
1789 static enum { /* Reasons for waking up */
1790 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1791 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1792 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1793 } hotkey_wakeup_reason;
1794
1795 static int hotkey_autosleep_ack;
1796
1797 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
1798 static u32 hotkey_all_mask; /* all events supported in fw */
1799 static u32 hotkey_reserved_mask; /* events better left disabled */
1800 static u32 hotkey_driver_mask; /* events needed by the driver */
1801 static u32 hotkey_user_mask; /* events visible to userspace */
1802 static u32 hotkey_acpi_mask; /* events enabled in firmware */
1803
1804 static unsigned int hotkey_report_mode;
1805
1806 static u16 *hotkey_keycode_map;
1807
1808 static struct attribute_set *hotkey_dev_attributes;
1809
1810 static void tpacpi_driver_event(const unsigned int hkey_event);
1811 static void hotkey_driver_event(const unsigned int scancode);
1812
1813 /* HKEY.MHKG() return bits */
1814 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1815
1816 static int hotkey_get_wlsw(int *status)
1817 {
1818 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1819 if (dbg_wlswemul) {
1820 *status = !!tpacpi_wlsw_emulstate;
1821 return 0;
1822 }
1823 #endif
1824 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1825 return -EIO;
1826 return 0;
1827 }
1828
1829 static int hotkey_get_tablet_mode(int *status)
1830 {
1831 int s;
1832
1833 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1834 return -EIO;
1835
1836 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1837 return 0;
1838 }
1839
1840 /*
1841 * Reads current event mask from firmware, and updates
1842 * hotkey_acpi_mask accordingly. Also resets any bits
1843 * from hotkey_user_mask that are unavailable to be
1844 * delivered (shadow requirement of the userspace ABI).
1845 *
1846 * Call with hotkey_mutex held
1847 */
1848 static int hotkey_mask_get(void)
1849 {
1850 if (tp_features.hotkey_mask) {
1851 u32 m = 0;
1852
1853 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1854 return -EIO;
1855
1856 hotkey_acpi_mask = m;
1857 } else {
1858 /* no mask support doesn't mean no event support... */
1859 hotkey_acpi_mask = hotkey_all_mask;
1860 }
1861
1862 /* sync userspace-visible mask */
1863 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
1864
1865 return 0;
1866 }
1867
1868 void static hotkey_mask_warn_incomplete_mask(void)
1869 {
1870 /* log only what the user can fix... */
1871 const u32 wantedmask = hotkey_driver_mask &
1872 ~(hotkey_acpi_mask | hotkey_source_mask) &
1873 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
1874
1875 if (wantedmask)
1876 printk(TPACPI_NOTICE
1877 "required events 0x%08x not enabled!\n",
1878 wantedmask);
1879 }
1880
1881 /*
1882 * Set the firmware mask when supported
1883 *
1884 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
1885 *
1886 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
1887 *
1888 * Call with hotkey_mutex held
1889 */
1890 static int hotkey_mask_set(u32 mask)
1891 {
1892 int i;
1893 int rc = 0;
1894
1895 const u32 fwmask = mask & ~hotkey_source_mask;
1896
1897 if (tp_features.hotkey_mask) {
1898 for (i = 0; i < 32; i++) {
1899 if (!acpi_evalf(hkey_handle,
1900 NULL, "MHKM", "vdd", i + 1,
1901 !!(mask & (1 << i)))) {
1902 rc = -EIO;
1903 break;
1904 }
1905 }
1906 }
1907
1908 /*
1909 * We *must* make an inconditional call to hotkey_mask_get to
1910 * refresh hotkey_acpi_mask and update hotkey_user_mask
1911 *
1912 * Take the opportunity to also log when we cannot _enable_
1913 * a given event.
1914 */
1915 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
1916 printk(TPACPI_NOTICE
1917 "asked for hotkey mask 0x%08x, but "
1918 "firmware forced it to 0x%08x\n",
1919 fwmask, hotkey_acpi_mask);
1920 }
1921
1922 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
1923 hotkey_mask_warn_incomplete_mask();
1924
1925 return rc;
1926 }
1927
1928 /*
1929 * Sets hotkey_user_mask and tries to set the firmware mask
1930 *
1931 * Call with hotkey_mutex held
1932 */
1933 static int hotkey_user_mask_set(const u32 mask)
1934 {
1935 int rc;
1936
1937 /* Give people a chance to notice they are doing something that
1938 * is bound to go boom on their users sooner or later */
1939 if (!tp_warned.hotkey_mask_ff &&
1940 (mask == 0xffff || mask == 0xffffff ||
1941 mask == 0xffffffff)) {
1942 tp_warned.hotkey_mask_ff = 1;
1943 printk(TPACPI_NOTICE
1944 "setting the hotkey mask to 0x%08x is likely "
1945 "not the best way to go about it\n", mask);
1946 printk(TPACPI_NOTICE
1947 "please consider using the driver defaults, "
1948 "and refer to up-to-date thinkpad-acpi "
1949 "documentation\n");
1950 }
1951
1952 /* Try to enable what the user asked for, plus whatever we need.
1953 * this syncs everything but won't enable bits in hotkey_user_mask */
1954 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
1955
1956 /* Enable the available bits in hotkey_user_mask */
1957 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
1958
1959 return rc;
1960 }
1961
1962 /*
1963 * Sets the driver hotkey mask.
1964 *
1965 * Can be called even if the hotkey subdriver is inactive
1966 */
1967 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
1968 {
1969 int rc;
1970
1971 /* Do the right thing if hotkey_init has not been called yet */
1972 if (!tp_features.hotkey) {
1973 hotkey_driver_mask = mask;
1974 return 0;
1975 }
1976
1977 mutex_lock(&hotkey_mutex);
1978
1979 HOTKEY_CONFIG_CRITICAL_START
1980 hotkey_driver_mask = mask;
1981 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1982 hotkey_source_mask |= (mask & ~hotkey_all_mask);
1983 #endif
1984 HOTKEY_CONFIG_CRITICAL_END
1985
1986 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
1987 ~hotkey_source_mask);
1988 mutex_unlock(&hotkey_mutex);
1989
1990 return rc;
1991 }
1992
1993 static int hotkey_status_get(int *status)
1994 {
1995 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1996 return -EIO;
1997
1998 return 0;
1999 }
2000
2001 static int hotkey_status_set(bool enable)
2002 {
2003 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2004 return -EIO;
2005
2006 return 0;
2007 }
2008
2009 static void tpacpi_input_send_tabletsw(void)
2010 {
2011 int state;
2012
2013 if (tp_features.hotkey_tablet &&
2014 !hotkey_get_tablet_mode(&state)) {
2015 mutex_lock(&tpacpi_inputdev_send_mutex);
2016
2017 input_report_switch(tpacpi_inputdev,
2018 SW_TABLET_MODE, !!state);
2019 input_sync(tpacpi_inputdev);
2020
2021 mutex_unlock(&tpacpi_inputdev_send_mutex);
2022 }
2023 }
2024
2025 /* Do NOT call without validating scancode first */
2026 static void tpacpi_input_send_key(const unsigned int scancode)
2027 {
2028 const unsigned int keycode = hotkey_keycode_map[scancode];
2029
2030 if (keycode != KEY_RESERVED) {
2031 mutex_lock(&tpacpi_inputdev_send_mutex);
2032
2033 input_report_key(tpacpi_inputdev, keycode, 1);
2034 if (keycode == KEY_UNKNOWN)
2035 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2036 scancode);
2037 input_sync(tpacpi_inputdev);
2038
2039 input_report_key(tpacpi_inputdev, keycode, 0);
2040 if (keycode == KEY_UNKNOWN)
2041 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2042 scancode);
2043 input_sync(tpacpi_inputdev);
2044
2045 mutex_unlock(&tpacpi_inputdev_send_mutex);
2046 }
2047 }
2048
2049 /* Do NOT call without validating scancode first */
2050 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2051 {
2052 hotkey_driver_event(scancode);
2053 if (hotkey_user_mask & (1 << scancode))
2054 tpacpi_input_send_key(scancode);
2055 }
2056
2057 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2058 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2059
2060 /* Do NOT call without validating scancode first */
2061 static void tpacpi_hotkey_send_key(unsigned int scancode)
2062 {
2063 tpacpi_input_send_key_masked(scancode);
2064 if (hotkey_report_mode < 2) {
2065 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2066 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2067 }
2068 }
2069
2070 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2071 {
2072 u8 d;
2073
2074 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2075 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2076 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2077 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2078 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2079 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2080 }
2081 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2082 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2083 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2084 }
2085 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2086 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2087 n->displayexp_toggle =
2088 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2089 }
2090 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2091 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2092 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2093 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2094 n->brightness_toggle =
2095 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2096 }
2097 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2098 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2099 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2100 >> TP_NVRAM_POS_LEVEL_VOLUME;
2101 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2102 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2103 }
2104 }
2105
2106 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2107 struct tp_nvram_state *newn,
2108 const u32 event_mask)
2109 {
2110
2111 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2112 do { \
2113 if ((event_mask & (1 << __scancode)) && \
2114 oldn->__member != newn->__member) \
2115 tpacpi_hotkey_send_key(__scancode); \
2116 } while (0)
2117
2118 #define TPACPI_MAY_SEND_KEY(__scancode) \
2119 do { \
2120 if (event_mask & (1 << __scancode)) \
2121 tpacpi_hotkey_send_key(__scancode); \
2122 } while (0)
2123
2124 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2125 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2126 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2127 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2128
2129 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2130
2131 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2132
2133 /* handle volume */
2134 if (oldn->volume_toggle != newn->volume_toggle) {
2135 if (oldn->mute != newn->mute) {
2136 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2137 }
2138 if (oldn->volume_level > newn->volume_level) {
2139 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2140 } else if (oldn->volume_level < newn->volume_level) {
2141 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2142 } else if (oldn->mute == newn->mute) {
2143 /* repeated key presses that didn't change state */
2144 if (newn->mute) {
2145 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2146 } else if (newn->volume_level != 0) {
2147 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2148 } else {
2149 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2150 }
2151 }
2152 }
2153
2154 /* handle brightness */
2155 if (oldn->brightness_toggle != newn->brightness_toggle) {
2156 if (oldn->brightness_level < newn->brightness_level) {
2157 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2158 } else if (oldn->brightness_level > newn->brightness_level) {
2159 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2160 } else {
2161 /* repeated key presses that didn't change state */
2162 if (newn->brightness_level != 0) {
2163 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2164 } else {
2165 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2166 }
2167 }
2168 }
2169
2170 #undef TPACPI_COMPARE_KEY
2171 #undef TPACPI_MAY_SEND_KEY
2172 }
2173
2174 /*
2175 * Polling driver
2176 *
2177 * We track all events in hotkey_source_mask all the time, since
2178 * most of them are edge-based. We only issue those requested by
2179 * hotkey_user_mask or hotkey_driver_mask, though.
2180 */
2181 static int hotkey_kthread(void *data)
2182 {
2183 struct tp_nvram_state s[2];
2184 u32 poll_mask, event_mask;
2185 unsigned int si, so;
2186 unsigned long t;
2187 unsigned int change_detector, must_reset;
2188 unsigned int poll_freq;
2189
2190 mutex_lock(&hotkey_thread_mutex);
2191
2192 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2193 goto exit;
2194
2195 set_freezable();
2196
2197 so = 0;
2198 si = 1;
2199 t = 0;
2200
2201 /* Initial state for compares */
2202 mutex_lock(&hotkey_thread_data_mutex);
2203 change_detector = hotkey_config_change;
2204 poll_mask = hotkey_source_mask;
2205 event_mask = hotkey_source_mask &
2206 (hotkey_driver_mask | hotkey_user_mask);
2207 poll_freq = hotkey_poll_freq;
2208 mutex_unlock(&hotkey_thread_data_mutex);
2209 hotkey_read_nvram(&s[so], poll_mask);
2210
2211 while (!kthread_should_stop()) {
2212 if (t == 0) {
2213 if (likely(poll_freq))
2214 t = 1000/poll_freq;
2215 else
2216 t = 100; /* should never happen... */
2217 }
2218 t = msleep_interruptible(t);
2219 if (unlikely(kthread_should_stop()))
2220 break;
2221 must_reset = try_to_freeze();
2222 if (t > 0 && !must_reset)
2223 continue;
2224
2225 mutex_lock(&hotkey_thread_data_mutex);
2226 if (must_reset || hotkey_config_change != change_detector) {
2227 /* forget old state on thaw or config change */
2228 si = so;
2229 t = 0;
2230 change_detector = hotkey_config_change;
2231 }
2232 poll_mask = hotkey_source_mask;
2233 event_mask = hotkey_source_mask &
2234 (hotkey_driver_mask | hotkey_user_mask);
2235 poll_freq = hotkey_poll_freq;
2236 mutex_unlock(&hotkey_thread_data_mutex);
2237
2238 if (likely(poll_mask)) {
2239 hotkey_read_nvram(&s[si], poll_mask);
2240 if (likely(si != so)) {
2241 hotkey_compare_and_issue_event(&s[so], &s[si],
2242 event_mask);
2243 }
2244 }
2245
2246 so = si;
2247 si ^= 1;
2248 }
2249
2250 exit:
2251 mutex_unlock(&hotkey_thread_mutex);
2252 return 0;
2253 }
2254
2255 /* call with hotkey_mutex held */
2256 static void hotkey_poll_stop_sync(void)
2257 {
2258 if (tpacpi_hotkey_task) {
2259 if (frozen(tpacpi_hotkey_task) ||
2260 freezing(tpacpi_hotkey_task))
2261 thaw_process(tpacpi_hotkey_task);
2262
2263 kthread_stop(tpacpi_hotkey_task);
2264 tpacpi_hotkey_task = NULL;
2265 mutex_lock(&hotkey_thread_mutex);
2266 /* at this point, the thread did exit */
2267 mutex_unlock(&hotkey_thread_mutex);
2268 }
2269 }
2270
2271 /* call with hotkey_mutex held */
2272 static void hotkey_poll_setup(bool may_warn)
2273 {
2274 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2275 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2276
2277 if (hotkey_poll_freq > 0 &&
2278 (poll_driver_mask ||
2279 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2280 if (!tpacpi_hotkey_task) {
2281 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2282 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2283 if (IS_ERR(tpacpi_hotkey_task)) {
2284 tpacpi_hotkey_task = NULL;
2285 printk(TPACPI_ERR
2286 "could not create kernel thread "
2287 "for hotkey polling\n");
2288 }
2289 }
2290 } else {
2291 hotkey_poll_stop_sync();
2292 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2293 hotkey_poll_freq == 0) {
2294 printk(TPACPI_NOTICE
2295 "hot keys 0x%08x and/or events 0x%08x "
2296 "require polling, which is currently "
2297 "disabled\n",
2298 poll_user_mask, poll_driver_mask);
2299 }
2300 }
2301 }
2302
2303 static void hotkey_poll_setup_safe(bool may_warn)
2304 {
2305 mutex_lock(&hotkey_mutex);
2306 hotkey_poll_setup(may_warn);
2307 mutex_unlock(&hotkey_mutex);
2308 }
2309
2310 /* call with hotkey_mutex held */
2311 static void hotkey_poll_set_freq(unsigned int freq)
2312 {
2313 if (!freq)
2314 hotkey_poll_stop_sync();
2315
2316 hotkey_poll_freq = freq;
2317 }
2318
2319 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2320
2321 static void hotkey_poll_setup_safe(bool __unused)
2322 {
2323 }
2324
2325 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2326
2327 static int hotkey_inputdev_open(struct input_dev *dev)
2328 {
2329 switch (tpacpi_lifecycle) {
2330 case TPACPI_LIFE_INIT:
2331 /*
2332 * hotkey_init will call hotkey_poll_setup_safe
2333 * at the appropriate moment
2334 */
2335 return 0;
2336 case TPACPI_LIFE_EXITING:
2337 return -EBUSY;
2338 case TPACPI_LIFE_RUNNING:
2339 hotkey_poll_setup_safe(false);
2340 return 0;
2341 }
2342
2343 /* Should only happen if tpacpi_lifecycle is corrupt */
2344 BUG();
2345 return -EBUSY;
2346 }
2347
2348 static void hotkey_inputdev_close(struct input_dev *dev)
2349 {
2350 /* disable hotkey polling when possible */
2351 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2352 !(hotkey_source_mask & hotkey_driver_mask))
2353 hotkey_poll_setup_safe(false);
2354 }
2355
2356 /* sysfs hotkey enable ------------------------------------------------- */
2357 static ssize_t hotkey_enable_show(struct device *dev,
2358 struct device_attribute *attr,
2359 char *buf)
2360 {
2361 int res, status;
2362
2363 printk_deprecated_attribute("hotkey_enable",
2364 "Hotkey reporting is always enabled");
2365
2366 res = hotkey_status_get(&status);
2367 if (res)
2368 return res;
2369
2370 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2371 }
2372
2373 static ssize_t hotkey_enable_store(struct device *dev,
2374 struct device_attribute *attr,
2375 const char *buf, size_t count)
2376 {
2377 unsigned long t;
2378
2379 printk_deprecated_attribute("hotkey_enable",
2380 "Hotkeys can be disabled through hotkey_mask");
2381
2382 if (parse_strtoul(buf, 1, &t))
2383 return -EINVAL;
2384
2385 if (t == 0)
2386 return -EPERM;
2387
2388 return count;
2389 }
2390
2391 static struct device_attribute dev_attr_hotkey_enable =
2392 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2393 hotkey_enable_show, hotkey_enable_store);
2394
2395 /* sysfs hotkey mask --------------------------------------------------- */
2396 static ssize_t hotkey_mask_show(struct device *dev,
2397 struct device_attribute *attr,
2398 char *buf)
2399 {
2400 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2401 }
2402
2403 static ssize_t hotkey_mask_store(struct device *dev,
2404 struct device_attribute *attr,
2405 const char *buf, size_t count)
2406 {
2407 unsigned long t;
2408 int res;
2409
2410 if (parse_strtoul(buf, 0xffffffffUL, &t))
2411 return -EINVAL;
2412
2413 if (mutex_lock_killable(&hotkey_mutex))
2414 return -ERESTARTSYS;
2415
2416 res = hotkey_user_mask_set(t);
2417
2418 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2419 hotkey_poll_setup(true);
2420 #endif
2421
2422 mutex_unlock(&hotkey_mutex);
2423
2424 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2425
2426 return (res) ? res : count;
2427 }
2428
2429 static struct device_attribute dev_attr_hotkey_mask =
2430 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2431 hotkey_mask_show, hotkey_mask_store);
2432
2433 /* sysfs hotkey bios_enabled ------------------------------------------- */
2434 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2435 struct device_attribute *attr,
2436 char *buf)
2437 {
2438 return sprintf(buf, "0\n");
2439 }
2440
2441 static struct device_attribute dev_attr_hotkey_bios_enabled =
2442 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2443
2444 /* sysfs hotkey bios_mask ---------------------------------------------- */
2445 static ssize_t hotkey_bios_mask_show(struct device *dev,
2446 struct device_attribute *attr,
2447 char *buf)
2448 {
2449 printk_deprecated_attribute("hotkey_bios_mask",
2450 "This attribute is useless.");
2451 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2452 }
2453
2454 static struct device_attribute dev_attr_hotkey_bios_mask =
2455 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2456
2457 /* sysfs hotkey all_mask ----------------------------------------------- */
2458 static ssize_t hotkey_all_mask_show(struct device *dev,
2459 struct device_attribute *attr,
2460 char *buf)
2461 {
2462 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2463 hotkey_all_mask | hotkey_source_mask);
2464 }
2465
2466 static struct device_attribute dev_attr_hotkey_all_mask =
2467 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2468
2469 /* sysfs hotkey recommended_mask --------------------------------------- */
2470 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2471 struct device_attribute *attr,
2472 char *buf)
2473 {
2474 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2475 (hotkey_all_mask | hotkey_source_mask)
2476 & ~hotkey_reserved_mask);
2477 }
2478
2479 static struct device_attribute dev_attr_hotkey_recommended_mask =
2480 __ATTR(hotkey_recommended_mask, S_IRUGO,
2481 hotkey_recommended_mask_show, NULL);
2482
2483 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2484
2485 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2486 static ssize_t hotkey_source_mask_show(struct device *dev,
2487 struct device_attribute *attr,
2488 char *buf)
2489 {
2490 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2491 }
2492
2493 static ssize_t hotkey_source_mask_store(struct device *dev,
2494 struct device_attribute *attr,
2495 const char *buf, size_t count)
2496 {
2497 unsigned long t;
2498 u32 r_ev;
2499 int rc;
2500
2501 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2502 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2503 return -EINVAL;
2504
2505 if (mutex_lock_killable(&hotkey_mutex))
2506 return -ERESTARTSYS;
2507
2508 HOTKEY_CONFIG_CRITICAL_START
2509 hotkey_source_mask = t;
2510 HOTKEY_CONFIG_CRITICAL_END
2511
2512 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2513 ~hotkey_source_mask);
2514 hotkey_poll_setup(true);
2515
2516 /* check if events needed by the driver got disabled */
2517 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2518 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2519
2520 mutex_unlock(&hotkey_mutex);
2521
2522 if (rc < 0)
2523 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2524 "firmware event mask!\n");
2525
2526 if (r_ev)
2527 printk(TPACPI_NOTICE "hotkey_source_mask: "
2528 "some important events were disabled: "
2529 "0x%04x\n", r_ev);
2530
2531 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2532
2533 return (rc < 0) ? rc : count;
2534 }
2535
2536 static struct device_attribute dev_attr_hotkey_source_mask =
2537 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2538 hotkey_source_mask_show, hotkey_source_mask_store);
2539
2540 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2541 static ssize_t hotkey_poll_freq_show(struct device *dev,
2542 struct device_attribute *attr,
2543 char *buf)
2544 {
2545 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2546 }
2547
2548 static ssize_t hotkey_poll_freq_store(struct device *dev,
2549 struct device_attribute *attr,
2550 const char *buf, size_t count)
2551 {
2552 unsigned long t;
2553
2554 if (parse_strtoul(buf, 25, &t))
2555 return -EINVAL;
2556
2557 if (mutex_lock_killable(&hotkey_mutex))
2558 return -ERESTARTSYS;
2559
2560 hotkey_poll_set_freq(t);
2561 hotkey_poll_setup(true);
2562
2563 mutex_unlock(&hotkey_mutex);
2564
2565 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2566
2567 return count;
2568 }
2569
2570 static struct device_attribute dev_attr_hotkey_poll_freq =
2571 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2572 hotkey_poll_freq_show, hotkey_poll_freq_store);
2573
2574 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2575
2576 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2577 static ssize_t hotkey_radio_sw_show(struct device *dev,
2578 struct device_attribute *attr,
2579 char *buf)
2580 {
2581 int res, s;
2582 res = hotkey_get_wlsw(&s);
2583 if (res < 0)
2584 return res;
2585
2586 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2587 }
2588
2589 static struct device_attribute dev_attr_hotkey_radio_sw =
2590 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2591
2592 static void hotkey_radio_sw_notify_change(void)
2593 {
2594 if (tp_features.hotkey_wlsw)
2595 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2596 "hotkey_radio_sw");
2597 }
2598
2599 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2600 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2601 struct device_attribute *attr,
2602 char *buf)
2603 {
2604 int res, s;
2605 res = hotkey_get_tablet_mode(&s);
2606 if (res < 0)
2607 return res;
2608
2609 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2610 }
2611
2612 static struct device_attribute dev_attr_hotkey_tablet_mode =
2613 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2614
2615 static void hotkey_tablet_mode_notify_change(void)
2616 {
2617 if (tp_features.hotkey_tablet)
2618 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2619 "hotkey_tablet_mode");
2620 }
2621
2622 /* sysfs hotkey report_mode -------------------------------------------- */
2623 static ssize_t hotkey_report_mode_show(struct device *dev,
2624 struct device_attribute *attr,
2625 char *buf)
2626 {
2627 return snprintf(buf, PAGE_SIZE, "%d\n",
2628 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2629 }
2630
2631 static struct device_attribute dev_attr_hotkey_report_mode =
2632 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2633
2634 /* sysfs wakeup reason (pollable) -------------------------------------- */
2635 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2636 struct device_attribute *attr,
2637 char *buf)
2638 {
2639 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2640 }
2641
2642 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2643 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2644
2645 static void hotkey_wakeup_reason_notify_change(void)
2646 {
2647 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2648 "wakeup_reason");
2649 }
2650
2651 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2652 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2653 struct device_attribute *attr,
2654 char *buf)
2655 {
2656 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2657 }
2658
2659 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2660 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2661 hotkey_wakeup_hotunplug_complete_show, NULL);
2662
2663 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2664 {
2665 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2666 "wakeup_hotunplug_complete");
2667 }
2668
2669 /* --------------------------------------------------------------------- */
2670
2671 static struct attribute *hotkey_attributes[] __initdata = {
2672 &dev_attr_hotkey_enable.attr,
2673 &dev_attr_hotkey_bios_enabled.attr,
2674 &dev_attr_hotkey_bios_mask.attr,
2675 &dev_attr_hotkey_report_mode.attr,
2676 &dev_attr_hotkey_wakeup_reason.attr,
2677 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2678 &dev_attr_hotkey_mask.attr,
2679 &dev_attr_hotkey_all_mask.attr,
2680 &dev_attr_hotkey_recommended_mask.attr,
2681 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2682 &dev_attr_hotkey_source_mask.attr,
2683 &dev_attr_hotkey_poll_freq.attr,
2684 #endif
2685 };
2686
2687 static void bluetooth_update_rfk(void);
2688 static void wan_update_rfk(void);
2689 static void uwb_update_rfk(void);
2690 static void tpacpi_send_radiosw_update(void)
2691 {
2692 int wlsw;
2693
2694 /* Sync these BEFORE sending any rfkill events */
2695 if (tp_features.bluetooth)
2696 bluetooth_update_rfk();
2697 if (tp_features.wan)
2698 wan_update_rfk();
2699 if (tp_features.uwb)
2700 uwb_update_rfk();
2701
2702 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2703 mutex_lock(&tpacpi_inputdev_send_mutex);
2704
2705 input_report_switch(tpacpi_inputdev,
2706 SW_RFKILL_ALL, !!wlsw);
2707 input_sync(tpacpi_inputdev);
2708
2709 mutex_unlock(&tpacpi_inputdev_send_mutex);
2710 }
2711 hotkey_radio_sw_notify_change();
2712 }
2713
2714 static void hotkey_exit(void)
2715 {
2716 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2717 mutex_lock(&hotkey_mutex);
2718 hotkey_poll_stop_sync();
2719 mutex_unlock(&hotkey_mutex);
2720 #endif
2721
2722 if (hotkey_dev_attributes)
2723 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2724
2725 kfree(hotkey_keycode_map);
2726
2727 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2728 "restoring original HKEY status and mask\n");
2729 /* yes, there is a bitwise or below, we want the
2730 * functions to be called even if one of them fail */
2731 if (((tp_features.hotkey_mask &&
2732 hotkey_mask_set(hotkey_orig_mask)) |
2733 hotkey_status_set(false)) != 0)
2734 printk(TPACPI_ERR
2735 "failed to restore hot key mask "
2736 "to BIOS defaults\n");
2737 }
2738
2739 static void __init hotkey_unmap(const unsigned int scancode)
2740 {
2741 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
2742 clear_bit(hotkey_keycode_map[scancode],
2743 tpacpi_inputdev->keybit);
2744 hotkey_keycode_map[scancode] = KEY_RESERVED;
2745 }
2746 }
2747
2748 /*
2749 * HKEY quirks:
2750 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
2751 */
2752
2753 #define TPACPI_HK_Q_INIMASK 0x0001
2754
2755 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
2756 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
2757 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
2758 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
2759 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
2760 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
2761 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
2762 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
2763 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
2764 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
2765 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
2766 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
2767 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
2768 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
2769 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
2770 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
2771 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
2772 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
2773 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
2774 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
2775 };
2776
2777 static int __init hotkey_init(struct ibm_init_struct *iibm)
2778 {
2779 /* Requirements for changing the default keymaps:
2780 *
2781 * 1. Many of the keys are mapped to KEY_RESERVED for very
2782 * good reasons. Do not change them unless you have deep
2783 * knowledge on the IBM and Lenovo ThinkPad firmware for
2784 * the various ThinkPad models. The driver behaves
2785 * differently for KEY_RESERVED: such keys have their
2786 * hot key mask *unset* in mask_recommended, and also
2787 * in the initial hot key mask programmed into the
2788 * firmware at driver load time, which means the firm-
2789 * ware may react very differently if you change them to
2790 * something else;
2791 *
2792 * 2. You must be subscribed to the linux-thinkpad and
2793 * ibm-acpi-devel mailing lists, and you should read the
2794 * list archives since 2007 if you want to change the
2795 * keymaps. This requirement exists so that you will
2796 * know the past history of problems with the thinkpad-
2797 * acpi driver keymaps, and also that you will be
2798 * listening to any bug reports;
2799 *
2800 * 3. Do not send thinkpad-acpi specific patches directly to
2801 * for merging, *ever*. Send them to the linux-acpi
2802 * mailinglist for comments. Merging is to be done only
2803 * through acpi-test and the ACPI maintainer.
2804 *
2805 * If the above is too much to ask, don't change the keymap.
2806 * Ask the thinkpad-acpi maintainer to do it, instead.
2807 */
2808 static u16 ibm_keycode_map[] __initdata = {
2809 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2810 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2811 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2812 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2813
2814 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2815 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2816 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2817 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2818
2819 /* brightness: firmware always reacts to them */
2820 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2821 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2822
2823 /* Thinklight: firmware always react to it */
2824 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2825
2826 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2827 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2828
2829 /* Volume: firmware always react to it and reprograms
2830 * the built-in *extra* mixer. Never map it to control
2831 * another mixer by default. */
2832 KEY_RESERVED, /* 0x14: VOLUME UP */
2833 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2834 KEY_RESERVED, /* 0x16: MUTE */
2835
2836 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2837
2838 /* (assignments unknown, please report if found) */
2839 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2840 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2841 };
2842 static u16 lenovo_keycode_map[] __initdata = {
2843 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2844 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2845 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2846 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2847
2848 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2849 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2850 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2851 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2852
2853 /* These should be enabled --only-- when ACPI video
2854 * is disabled (i.e. in "vendor" mode), and are handled
2855 * in a special way by the init code */
2856 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
2857 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
2858
2859 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2860
2861 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2862 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2863
2864 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2865 * react to it and reprograms the built-in *extra* mixer.
2866 * Never map it to control another mixer by default.
2867 *
2868 * T60?, T61, R60?, R61: firmware and EC tries to send
2869 * these over the regular keyboard, so these are no-ops,
2870 * but there are still weird bugs re. MUTE, so do not
2871 * change unless you get test reports from all Lenovo
2872 * models. May cause the BIOS to interfere with the
2873 * HDA mixer.
2874 */
2875 KEY_RESERVED, /* 0x14: VOLUME UP */
2876 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2877 KEY_RESERVED, /* 0x16: MUTE */
2878
2879 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2880
2881 /* (assignments unknown, please report if found) */
2882 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2883 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2884 };
2885
2886 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2887 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2888 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2889
2890 int res, i;
2891 int status;
2892 int hkeyv;
2893
2894 unsigned long quirks;
2895
2896 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2897 "initializing hotkey subdriver\n");
2898
2899 BUG_ON(!tpacpi_inputdev);
2900 BUG_ON(tpacpi_inputdev->open != NULL ||
2901 tpacpi_inputdev->close != NULL);
2902
2903 TPACPI_ACPIHANDLE_INIT(hkey);
2904 mutex_init(&hotkey_mutex);
2905
2906 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2907 mutex_init(&hotkey_thread_mutex);
2908 mutex_init(&hotkey_thread_data_mutex);
2909 #endif
2910
2911 /* hotkey not supported on 570 */
2912 tp_features.hotkey = hkey_handle != NULL;
2913
2914 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2915 "hotkeys are %s\n",
2916 str_supported(tp_features.hotkey));
2917
2918 if (!tp_features.hotkey)
2919 return 1;
2920
2921 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
2922 ARRAY_SIZE(tpacpi_hotkey_qtable));
2923
2924 tpacpi_disable_brightness_delay();
2925
2926 /* MUST have enough space for all attributes to be added to
2927 * hotkey_dev_attributes */
2928 hotkey_dev_attributes = create_attr_set(
2929 ARRAY_SIZE(hotkey_attributes) + 2,
2930 NULL);
2931 if (!hotkey_dev_attributes)
2932 return -ENOMEM;
2933 res = add_many_to_attr_set(hotkey_dev_attributes,
2934 hotkey_attributes,
2935 ARRAY_SIZE(hotkey_attributes));
2936 if (res)
2937 goto err_exit;
2938
2939 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
2940 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2941 for HKEY interface version 0x100 */
2942 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2943 if ((hkeyv >> 8) != 1) {
2944 printk(TPACPI_ERR "unknown version of the "
2945 "HKEY interface: 0x%x\n", hkeyv);
2946 printk(TPACPI_ERR "please report this to %s\n",
2947 TPACPI_MAIL);
2948 } else {
2949 /*
2950 * MHKV 0x100 in A31, R40, R40e,
2951 * T4x, X31, and later
2952 */
2953 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2954 "firmware HKEY interface version: 0x%x\n",
2955 hkeyv);
2956
2957 /* Paranoia check AND init hotkey_all_mask */
2958 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2959 "MHKA", "qd")) {
2960 printk(TPACPI_ERR
2961 "missing MHKA handler, "
2962 "please report this to %s\n",
2963 TPACPI_MAIL);
2964 /* Fallback: pre-init for FN+F3,F4,F12 */
2965 hotkey_all_mask = 0x080cU;
2966 } else {
2967 tp_features.hotkey_mask = 1;
2968 }
2969 }
2970 }
2971
2972 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2973 "hotkey masks are %s\n",
2974 str_supported(tp_features.hotkey_mask));
2975
2976 /* Init hotkey_all_mask if not initialized yet */
2977 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
2978 (quirks & TPACPI_HK_Q_INIMASK))
2979 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
2980
2981 /* Init hotkey_acpi_mask and hotkey_orig_mask */
2982 if (tp_features.hotkey_mask) {
2983 /* hotkey_source_mask *must* be zero for
2984 * the first hotkey_mask_get to return hotkey_orig_mask */
2985 res = hotkey_mask_get();
2986 if (res)
2987 goto err_exit;
2988
2989 hotkey_orig_mask = hotkey_acpi_mask;
2990 } else {
2991 hotkey_orig_mask = hotkey_all_mask;
2992 hotkey_acpi_mask = hotkey_all_mask;
2993 }
2994
2995 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2996 if (dbg_wlswemul) {
2997 tp_features.hotkey_wlsw = 1;
2998 printk(TPACPI_INFO
2999 "radio switch emulation enabled\n");
3000 } else
3001 #endif
3002 /* Not all thinkpads have a hardware radio switch */
3003 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3004 tp_features.hotkey_wlsw = 1;
3005 printk(TPACPI_INFO
3006 "radio switch found; radios are %s\n",
3007 enabled(status, 0));
3008 }
3009 if (tp_features.hotkey_wlsw)
3010 res = add_to_attr_set(hotkey_dev_attributes,
3011 &dev_attr_hotkey_radio_sw.attr);
3012
3013 /* For X41t, X60t, X61t Tablets... */
3014 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3015 tp_features.hotkey_tablet = 1;
3016 printk(TPACPI_INFO
3017 "possible tablet mode switch found; "
3018 "ThinkPad in %s mode\n",
3019 (status & TP_HOTKEY_TABLET_MASK)?
3020 "tablet" : "laptop");
3021 res = add_to_attr_set(hotkey_dev_attributes,
3022 &dev_attr_hotkey_tablet_mode.attr);
3023 }
3024
3025 if (!res)
3026 res = register_attr_set_with_sysfs(
3027 hotkey_dev_attributes,
3028 &tpacpi_pdev->dev.kobj);
3029 if (res)
3030 goto err_exit;
3031
3032 /* Set up key map */
3033
3034 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3035 GFP_KERNEL);
3036 if (!hotkey_keycode_map) {
3037 printk(TPACPI_ERR
3038 "failed to allocate memory for key map\n");
3039 res = -ENOMEM;
3040 goto err_exit;
3041 }
3042
3043 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3044 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3045 "using Lenovo default hot key map\n");
3046 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3047 TPACPI_HOTKEY_MAP_SIZE);
3048 } else {
3049 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3050 "using IBM default hot key map\n");
3051 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3052 TPACPI_HOTKEY_MAP_SIZE);
3053 }
3054
3055 set_bit(EV_KEY, tpacpi_inputdev->evbit);
3056 set_bit(EV_MSC, tpacpi_inputdev->evbit);
3057 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3058 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3059 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3060 tpacpi_inputdev->keycode = hotkey_keycode_map;
3061 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3062 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3063 set_bit(hotkey_keycode_map[i],
3064 tpacpi_inputdev->keybit);
3065 } else {
3066 if (i < sizeof(hotkey_reserved_mask)*8)
3067 hotkey_reserved_mask |= 1 << i;
3068 }
3069 }
3070
3071 if (tp_features.hotkey_wlsw) {
3072 set_bit(EV_SW, tpacpi_inputdev->evbit);
3073 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3074 }
3075 if (tp_features.hotkey_tablet) {
3076 set_bit(EV_SW, tpacpi_inputdev->evbit);
3077 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3078 }
3079
3080 /* Do not issue duplicate brightness change events to
3081 * userspace */
3082 if (!tp_features.bright_acpimode)
3083 /* update bright_acpimode... */
3084 tpacpi_check_std_acpi_brightness_support();
3085
3086 if (tp_features.bright_acpimode) {
3087 printk(TPACPI_INFO
3088 "This ThinkPad has standard ACPI backlight "
3089 "brightness control, supported by the ACPI "
3090 "video driver\n");
3091 printk(TPACPI_NOTICE
3092 "Disabling thinkpad-acpi brightness events "
3093 "by default...\n");
3094
3095 /* Disable brightness up/down on Lenovo thinkpads when
3096 * ACPI is handling them, otherwise it is plain impossible
3097 * for userspace to do something even remotely sane */
3098 hotkey_reserved_mask |=
3099 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3100 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3101 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3102 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3103 }
3104
3105 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3106 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3107 & ~hotkey_all_mask
3108 & ~hotkey_reserved_mask;
3109
3110 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3111 "hotkey source mask 0x%08x, polling freq %u\n",
3112 hotkey_source_mask, hotkey_poll_freq);
3113 #endif
3114
3115 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3116 "enabling firmware HKEY event interface...\n");
3117 res = hotkey_status_set(true);
3118 if (res) {
3119 hotkey_exit();
3120 return res;
3121 }
3122 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3123 | hotkey_driver_mask)
3124 & ~hotkey_source_mask);
3125 if (res < 0 && res != -ENXIO) {
3126 hotkey_exit();
3127 return res;
3128 }
3129 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3130 & ~hotkey_reserved_mask;
3131 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3132 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3133 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3134
3135 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3136 "legacy ibm/hotkey event reporting over procfs %s\n",
3137 (hotkey_report_mode < 2) ?
3138 "enabled" : "disabled");
3139
3140 tpacpi_inputdev->open = &hotkey_inputdev_open;
3141 tpacpi_inputdev->close = &hotkey_inputdev_close;
3142
3143 hotkey_poll_setup_safe(true);
3144 tpacpi_send_radiosw_update();
3145 tpacpi_input_send_tabletsw();
3146
3147 return 0;
3148
3149 err_exit:
3150 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3151 hotkey_dev_attributes = NULL;
3152
3153 return (res < 0)? res : 1;
3154 }
3155
3156 static bool hotkey_notify_hotkey(const u32 hkey,
3157 bool *send_acpi_ev,
3158 bool *ignore_acpi_ev)
3159 {
3160 /* 0x1000-0x1FFF: key presses */
3161 unsigned int scancode = hkey & 0xfff;
3162 *send_acpi_ev = true;
3163 *ignore_acpi_ev = false;
3164
3165 if (scancode > 0 && scancode < 0x21) {
3166 scancode--;
3167 if (!(hotkey_source_mask & (1 << scancode))) {
3168 tpacpi_input_send_key_masked(scancode);
3169 *send_acpi_ev = false;
3170 } else {
3171 *ignore_acpi_ev = true;
3172 }
3173 return true;
3174 }
3175 return false;
3176 }
3177
3178 static bool hotkey_notify_wakeup(const u32 hkey,
3179 bool *send_acpi_ev,
3180 bool *ignore_acpi_ev)
3181 {
3182 /* 0x2000-0x2FFF: Wakeup reason */
3183 *send_acpi_ev = true;
3184 *ignore_acpi_ev = false;
3185
3186 switch (hkey) {
3187 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3188 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3189 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3190 *ignore_acpi_ev = true;
3191 break;
3192
3193 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3194 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3195 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3196 *ignore_acpi_ev = true;
3197 break;
3198
3199 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3200 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3201 printk(TPACPI_ALERT
3202 "EMERGENCY WAKEUP: battery almost empty\n");
3203 /* how to auto-heal: */
3204 /* 2313: woke up from S3, go to S4/S5 */
3205 /* 2413: woke up from S4, go to S5 */
3206 break;
3207
3208 default:
3209 return false;
3210 }
3211
3212 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3213 printk(TPACPI_INFO
3214 "woke up due to a hot-unplug "
3215 "request...\n");
3216 hotkey_wakeup_reason_notify_change();
3217 }
3218 return true;
3219 }
3220
3221 static bool hotkey_notify_usrevent(const u32 hkey,
3222 bool *send_acpi_ev,
3223 bool *ignore_acpi_ev)
3224 {
3225 /* 0x5000-0x5FFF: human interface helpers */
3226 *send_acpi_ev = true;
3227 *ignore_acpi_ev = false;
3228
3229 switch (hkey) {
3230 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3231 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3232 return true;
3233
3234 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3235 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3236 tpacpi_input_send_tabletsw();
3237 hotkey_tablet_mode_notify_change();
3238 *send_acpi_ev = false;
3239 return true;
3240
3241 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3242 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3243 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3244 /* do not propagate these events */
3245 *ignore_acpi_ev = true;
3246 return true;
3247
3248 default:
3249 return false;
3250 }
3251 }
3252
3253 static void thermal_dump_all_sensors(void);
3254
3255 static bool hotkey_notify_thermal(const u32 hkey,
3256 bool *send_acpi_ev,
3257 bool *ignore_acpi_ev)
3258 {
3259 bool known = true;
3260
3261 /* 0x6000-0x6FFF: thermal alarms */
3262 *send_acpi_ev = true;
3263 *ignore_acpi_ev = false;
3264
3265 switch (hkey) {
3266 case TP_HKEY_EV_THM_TABLE_CHANGED:
3267 printk(TPACPI_INFO
3268 "EC reports that Thermal Table has changed\n");
3269 /* recommended action: do nothing, we don't have
3270 * Lenovo ATM information */
3271 return true;
3272 case TP_HKEY_EV_ALARM_BAT_HOT:
3273 printk(TPACPI_CRIT
3274 "THERMAL ALARM: battery is too hot!\n");
3275 /* recommended action: warn user through gui */
3276 break;
3277 case TP_HKEY_EV_ALARM_BAT_XHOT:
3278 printk(TPACPI_ALERT
3279 "THERMAL EMERGENCY: battery is extremely hot!\n");
3280 /* recommended action: immediate sleep/hibernate */
3281 break;
3282 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3283 printk(TPACPI_CRIT
3284 "THERMAL ALARM: "
3285 "a sensor reports something is too hot!\n");
3286 /* recommended action: warn user through gui, that */
3287 /* some internal component is too hot */
3288 break;
3289 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3290 printk(TPACPI_ALERT
3291 "THERMAL EMERGENCY: "
3292 "a sensor reports something is extremely hot!\n");
3293 /* recommended action: immediate sleep/hibernate */
3294 break;
3295 default:
3296 printk(TPACPI_ALERT
3297 "THERMAL ALERT: unknown thermal alarm received\n");
3298 known = false;
3299 }
3300
3301 thermal_dump_all_sensors();
3302
3303 return known;
3304 }
3305
3306 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3307 {
3308 u32 hkey;
3309 bool send_acpi_ev;
3310 bool ignore_acpi_ev;
3311 bool known_ev;
3312
3313 if (event != 0x80) {
3314 printk(TPACPI_ERR
3315 "unknown HKEY notification event %d\n", event);
3316 /* forward it to userspace, maybe it knows how to handle it */
3317 acpi_bus_generate_netlink_event(
3318 ibm->acpi->device->pnp.device_class,
3319 dev_name(&ibm->acpi->device->dev),
3320 event, 0);
3321 return;
3322 }
3323
3324 while (1) {
3325 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3326 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3327 return;
3328 }
3329
3330 if (hkey == 0) {
3331 /* queue empty */
3332 return;
3333 }
3334
3335 send_acpi_ev = true;
3336 ignore_acpi_ev = false;
3337
3338 switch (hkey >> 12) {
3339 case 1:
3340 /* 0x1000-0x1FFF: key presses */
3341 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3342 &ignore_acpi_ev);
3343 break;
3344 case 2:
3345 /* 0x2000-0x2FFF: Wakeup reason */
3346 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3347 &ignore_acpi_ev);
3348 break;
3349 case 3:
3350 /* 0x3000-0x3FFF: bay-related wakeups */
3351 if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3352 hotkey_autosleep_ack = 1;
3353 printk(TPACPI_INFO
3354 "bay ejected\n");
3355 hotkey_wakeup_hotunplug_complete_notify_change();
3356 known_ev = true;
3357 } else {
3358 known_ev = false;
3359 }
3360 break;
3361 case 4:
3362 /* 0x4000-0x4FFF: dock-related wakeups */
3363 if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3364 hotkey_autosleep_ack = 1;
3365 printk(TPACPI_INFO
3366 "undocked\n");
3367 hotkey_wakeup_hotunplug_complete_notify_change();
3368 known_ev = true;
3369 } else {
3370 known_ev = false;
3371 }
3372 break;
3373 case 5:
3374 /* 0x5000-0x5FFF: human interface helpers */
3375 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3376 &ignore_acpi_ev);
3377 break;
3378 case 6:
3379 /* 0x6000-0x6FFF: thermal alarms */
3380 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3381 &ignore_acpi_ev);
3382 break;
3383 case 7:
3384 /* 0x7000-0x7FFF: misc */
3385 if (tp_features.hotkey_wlsw &&
3386 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3387 tpacpi_send_radiosw_update();
3388 send_acpi_ev = 0;
3389 known_ev = true;
3390 break;
3391 }
3392 /* fallthrough to default */
3393 default:
3394 known_ev = false;
3395 }
3396 if (!known_ev) {
3397 printk(TPACPI_NOTICE
3398 "unhandled HKEY event 0x%04x\n", hkey);
3399 printk(TPACPI_NOTICE
3400 "please report the conditions when this "
3401 "event happened to %s\n", TPACPI_MAIL);
3402 }
3403
3404 /* Legacy events */
3405 if (!ignore_acpi_ev &&
3406 (send_acpi_ev || hotkey_report_mode < 2)) {
3407 acpi_bus_generate_proc_event(ibm->acpi->device,
3408 event, hkey);
3409 }
3410
3411 /* netlink events */
3412 if (!ignore_acpi_ev && send_acpi_ev) {
3413 acpi_bus_generate_netlink_event(
3414 ibm->acpi->device->pnp.device_class,
3415 dev_name(&ibm->acpi->device->dev),
3416 event, hkey);
3417 }
3418 }
3419 }
3420
3421 static void hotkey_suspend(pm_message_t state)
3422 {
3423 /* Do these on suspend, we get the events on early resume! */
3424 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3425 hotkey_autosleep_ack = 0;
3426 }
3427
3428 static void hotkey_resume(void)
3429 {
3430 tpacpi_disable_brightness_delay();
3431
3432 if (hotkey_status_set(true) < 0 ||
3433 hotkey_mask_set(hotkey_acpi_mask) < 0)
3434 printk(TPACPI_ERR
3435 "error while attempting to reset the event "
3436 "firmware interface\n");
3437
3438 tpacpi_send_radiosw_update();
3439 hotkey_tablet_mode_notify_change();
3440 hotkey_wakeup_reason_notify_change();
3441 hotkey_wakeup_hotunplug_complete_notify_change();
3442 hotkey_poll_setup_safe(false);
3443 }
3444
3445 /* procfs -------------------------------------------------------------- */
3446 static int hotkey_read(char *p)
3447 {
3448 int res, status;
3449 int len = 0;
3450
3451 if (!tp_features.hotkey) {
3452 len += sprintf(p + len, "status:\t\tnot supported\n");
3453 return len;
3454 }
3455
3456 if (mutex_lock_killable(&hotkey_mutex))
3457 return -ERESTARTSYS;
3458 res = hotkey_status_get(&status);
3459 if (!res)
3460 res = hotkey_mask_get();
3461 mutex_unlock(&hotkey_mutex);
3462 if (res)
3463 return res;
3464
3465 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3466 if (hotkey_all_mask) {
3467 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask);
3468 len += sprintf(p + len,
3469 "commands:\tenable, disable, reset, <mask>\n");
3470 } else {
3471 len += sprintf(p + len, "mask:\t\tnot supported\n");
3472 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3473 }
3474
3475 return len;
3476 }
3477
3478 static void hotkey_enabledisable_warn(bool enable)
3479 {
3480 tpacpi_log_usertask("procfs hotkey enable/disable");
3481 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3482 TPACPI_WARN
3483 "hotkey enable/disable functionality has been "
3484 "removed from the driver. Hotkeys are always "
3485 "enabled\n"))
3486 printk(TPACPI_ERR
3487 "Please remove the hotkey=enable module "
3488 "parameter, it is deprecated. Hotkeys are always "
3489 "enabled\n");
3490 }
3491
3492 static int hotkey_write(char *buf)
3493 {
3494 int res;
3495 u32 mask;
3496 char *cmd;
3497
3498 if (!tp_features.hotkey)
3499 return -ENODEV;
3500
3501 if (mutex_lock_killable(&hotkey_mutex))
3502 return -ERESTARTSYS;
3503
3504 mask = hotkey_user_mask;
3505
3506 res = 0;
3507 while ((cmd = next_cmd(&buf))) {
3508 if (strlencmp(cmd, "enable") == 0) {
3509 hotkey_enabledisable_warn(1);
3510 } else if (strlencmp(cmd, "disable") == 0) {
3511 hotkey_enabledisable_warn(0);
3512 res = -EPERM;
3513 } else if (strlencmp(cmd, "reset") == 0) {
3514 mask = (hotkey_all_mask | hotkey_source_mask)
3515 & ~hotkey_reserved_mask;
3516 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3517 /* mask set */
3518 } else if (sscanf(cmd, "%x", &mask) == 1) {
3519 /* mask set */
3520 } else {
3521 res = -EINVAL;
3522 goto errexit;
3523 }
3524 }
3525
3526 if (!res) {
3527 tpacpi_disclose_usertask("procfs hotkey",
3528 "set mask to 0x%08x\n", mask);
3529 res = hotkey_user_mask_set(mask);
3530 }
3531
3532 errexit:
3533 mutex_unlock(&hotkey_mutex);
3534 return res;
3535 }
3536
3537 static const struct acpi_device_id ibm_htk_device_ids[] = {
3538 {TPACPI_ACPI_HKEY_HID, 0},
3539 {"", 0},
3540 };
3541
3542 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3543 .hid = ibm_htk_device_ids,
3544 .notify = hotkey_notify,
3545 .handle = &hkey_handle,
3546 .type = ACPI_DEVICE_NOTIFY,
3547 };
3548
3549 static struct ibm_struct hotkey_driver_data = {
3550 .name = "hotkey",
3551 .read = hotkey_read,
3552 .write = hotkey_write,
3553 .exit = hotkey_exit,
3554 .resume = hotkey_resume,
3555 .suspend = hotkey_suspend,
3556 .acpi = &ibm_hotkey_acpidriver,
3557 };
3558
3559 /*************************************************************************
3560 * Bluetooth subdriver
3561 */
3562
3563 enum {
3564 /* ACPI GBDC/SBDC bits */
3565 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3566 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3567 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3568 off / last state */
3569 };
3570
3571 enum {
3572 /* ACPI \BLTH commands */
3573 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3574 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3575 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3576 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3577 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3578 };
3579
3580 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3581
3582 static struct rfkill *tpacpi_bluetooth_rfkill;
3583
3584 static void bluetooth_suspend(pm_message_t state)
3585 {
3586 /* Try to make sure radio will resume powered off */
3587 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3588 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3589 vdbg_printk(TPACPI_DBG_RFKILL,
3590 "bluetooth power down on resume request failed\n");
3591 }
3592
3593 static int bluetooth_get_radiosw(void)
3594 {
3595 int status;
3596
3597 if (!tp_features.bluetooth)
3598 return -ENODEV;
3599
3600 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
3601 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3602 return RFKILL_STATE_HARD_BLOCKED;
3603
3604 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3605 if (dbg_bluetoothemul)
3606 return (tpacpi_bluetooth_emulstate) ?
3607 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3608 #endif
3609
3610 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3611 return -EIO;
3612
3613 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3614 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3615 }
3616
3617 static void bluetooth_update_rfk(void)
3618 {
3619 int status;
3620
3621 if (!tpacpi_bluetooth_rfkill)
3622 return;
3623
3624 status = bluetooth_get_radiosw();
3625 if (status < 0)
3626 return;
3627 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3628
3629 vdbg_printk(TPACPI_DBG_RFKILL,
3630 "forced rfkill state to %d\n",
3631 status);
3632 }
3633
3634 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3635 {
3636 int status;
3637
3638 if (!tp_features.bluetooth)
3639 return -ENODEV;
3640
3641 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3642 * reason to risk weird behaviour. */
3643 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3644 && radio_on)
3645 return -EPERM;
3646
3647 vdbg_printk(TPACPI_DBG_RFKILL,
3648 "will %s bluetooth\n", radio_on ? "enable" : "disable");
3649
3650 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3651 if (dbg_bluetoothemul) {
3652 tpacpi_bluetooth_emulstate = !!radio_on;
3653 if (update_rfk)
3654 bluetooth_update_rfk();
3655 return 0;
3656 }
3657 #endif
3658
3659 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3660 if (radio_on)
3661 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3662 else
3663 status = 0;
3664 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3665 return -EIO;
3666
3667 if (update_rfk)
3668 bluetooth_update_rfk();
3669
3670 return 0;
3671 }
3672
3673 /* sysfs bluetooth enable ---------------------------------------------- */
3674 static ssize_t bluetooth_enable_show(struct device *dev,
3675 struct device_attribute *attr,
3676 char *buf)
3677 {
3678 int status;
3679
3680 printk_deprecated_rfkill_attribute("bluetooth_enable");
3681
3682 status = bluetooth_get_radiosw();
3683 if (status < 0)
3684 return status;
3685
3686 return snprintf(buf, PAGE_SIZE, "%d\n",
3687 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3688 }
3689
3690 static ssize_t bluetooth_enable_store(struct device *dev,
3691 struct device_attribute *attr,
3692 const char *buf, size_t count)
3693 {
3694 unsigned long t;
3695 int res;
3696
3697 printk_deprecated_rfkill_attribute("bluetooth_enable");
3698
3699 if (parse_strtoul(buf, 1, &t))
3700 return -EINVAL;
3701
3702 tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
3703
3704 res = bluetooth_set_radiosw(t, 1);
3705
3706 return (res) ? res : count;
3707 }
3708
3709 static struct device_attribute dev_attr_bluetooth_enable =
3710 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3711 bluetooth_enable_show, bluetooth_enable_store);
3712
3713 /* --------------------------------------------------------------------- */
3714
3715 static struct attribute *bluetooth_attributes[] = {
3716 &dev_attr_bluetooth_enable.attr,
3717 NULL
3718 };
3719
3720 static const struct attribute_group bluetooth_attr_group = {
3721 .attrs = bluetooth_attributes,
3722 };
3723
3724 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3725 {
3726 int bts = bluetooth_get_radiosw();
3727
3728 if (bts < 0)
3729 return bts;
3730
3731 *state = bts;
3732 return 0;
3733 }
3734
3735 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3736 {
3737 dbg_printk(TPACPI_DBG_RFKILL,
3738 "request to change radio state to %d\n", state);
3739 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3740 }
3741
3742 static void bluetooth_shutdown(void)
3743 {
3744 /* Order firmware to save current state to NVRAM */
3745 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3746 TP_ACPI_BLTH_SAVE_STATE))
3747 printk(TPACPI_NOTICE
3748 "failed to save bluetooth state to NVRAM\n");
3749 else
3750 vdbg_printk(TPACPI_DBG_RFKILL,
3751 "bluestooth state saved to NVRAM\n");
3752 }
3753
3754 static void bluetooth_exit(void)
3755 {
3756 bluetooth_shutdown();
3757
3758 if (tpacpi_bluetooth_rfkill)
3759 rfkill_unregister(tpacpi_bluetooth_rfkill);
3760
3761 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3762 &bluetooth_attr_group);
3763 }
3764
3765 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3766 {
3767 int res;
3768 int status = 0;
3769
3770 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3771 "initializing bluetooth subdriver\n");
3772
3773 TPACPI_ACPIHANDLE_INIT(hkey);
3774
3775 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3776 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3777 tp_features.bluetooth = hkey_handle &&
3778 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3779
3780 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3781 "bluetooth is %s, status 0x%02x\n",
3782 str_supported(tp_features.bluetooth),
3783 status);
3784
3785 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3786 if (dbg_bluetoothemul) {
3787 tp_features.bluetooth = 1;
3788 printk(TPACPI_INFO
3789 "bluetooth switch emulation enabled\n");
3790 } else
3791 #endif
3792 if (tp_features.bluetooth &&
3793 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3794 /* no bluetooth hardware present in system */
3795 tp_features.bluetooth = 0;
3796 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3797 "bluetooth hardware not installed\n");
3798 }
3799
3800 if (!tp_features.bluetooth)
3801 return 1;
3802
3803 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3804 &bluetooth_attr_group);
3805 if (res)
3806 return res;
3807
3808 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3809 &tpacpi_bluetooth_rfkill,
3810 RFKILL_TYPE_BLUETOOTH,
3811 TPACPI_RFK_BLUETOOTH_SW_NAME,
3812 true,
3813 tpacpi_bluetooth_rfk_set,
3814 tpacpi_bluetooth_rfk_get);
3815 if (res) {
3816 bluetooth_exit();
3817 return res;
3818 }
3819
3820 return 0;
3821 }
3822
3823 /* procfs -------------------------------------------------------------- */
3824 static int bluetooth_read(char *p)
3825 {
3826 int len = 0;
3827 int status = bluetooth_get_radiosw();
3828
3829 if (!tp_features.bluetooth)
3830 len += sprintf(p + len, "status:\t\tnot supported\n");
3831 else {
3832 len += sprintf(p + len, "status:\t\t%s\n",
3833 (status == RFKILL_STATE_UNBLOCKED) ?
3834 "enabled" : "disabled");
3835 len += sprintf(p + len, "commands:\tenable, disable\n");
3836 }
3837
3838 return len;
3839 }
3840
3841 static int bluetooth_write(char *buf)
3842 {
3843 char *cmd;
3844 int state = -1;
3845
3846 if (!tp_features.bluetooth)
3847 return -ENODEV;
3848
3849 while ((cmd = next_cmd(&buf))) {
3850 if (strlencmp(cmd, "enable") == 0) {
3851 state = 1;
3852 } else if (strlencmp(cmd, "disable") == 0) {
3853 state = 0;
3854 } else
3855 return -EINVAL;
3856 }
3857
3858 if (state != -1) {
3859 tpacpi_disclose_usertask("procfs bluetooth",
3860 "attempt to %s\n",
3861 state ? "enable" : "disable");
3862 bluetooth_set_radiosw(state, 1);
3863 }
3864
3865 return 0;
3866 }
3867
3868 static struct ibm_struct bluetooth_driver_data = {
3869 .name = "bluetooth",
3870 .read = bluetooth_read,
3871 .write = bluetooth_write,
3872 .exit = bluetooth_exit,
3873 .suspend = bluetooth_suspend,
3874 .shutdown = bluetooth_shutdown,
3875 };
3876
3877 /*************************************************************************
3878 * Wan subdriver
3879 */
3880
3881 enum {
3882 /* ACPI GWAN/SWAN bits */
3883 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3884 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3885 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3886 off / last state */
3887 };
3888
3889 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3890
3891 static struct rfkill *tpacpi_wan_rfkill;
3892
3893 static void wan_suspend(pm_message_t state)
3894 {
3895 /* Try to make sure radio will resume powered off */
3896 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3897 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3898 vdbg_printk(TPACPI_DBG_RFKILL,
3899 "WWAN power down on resume request failed\n");
3900 }
3901
3902 static int wan_get_radiosw(void)
3903 {
3904 int status;
3905
3906 if (!tp_features.wan)
3907 return -ENODEV;
3908
3909 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3910 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3911 return RFKILL_STATE_HARD_BLOCKED;
3912
3913 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3914 if (dbg_wwanemul)
3915 return (tpacpi_wwan_emulstate) ?
3916 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3917 #endif
3918
3919 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3920 return -EIO;
3921
3922 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3923 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3924 }
3925
3926 static void wan_update_rfk(void)
3927 {
3928 int status;
3929
3930 if (!tpacpi_wan_rfkill)
3931 return;
3932
3933 status = wan_get_radiosw();
3934 if (status < 0)
3935 return;
3936 rfkill_force_state(tpacpi_wan_rfkill, status);
3937
3938 vdbg_printk(TPACPI_DBG_RFKILL,
3939 "forced rfkill state to %d\n",
3940 status);
3941 }
3942
3943 static int wan_set_radiosw(int radio_on, int update_rfk)
3944 {
3945 int status;
3946
3947 if (!tp_features.wan)
3948 return -ENODEV;
3949
3950 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3951 * reason to risk weird behaviour. */
3952 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3953 && radio_on)
3954 return -EPERM;
3955
3956 vdbg_printk(TPACPI_DBG_RFKILL,
3957 "will %s WWAN\n", radio_on ? "enable" : "disable");
3958
3959 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3960 if (dbg_wwanemul) {
3961 tpacpi_wwan_emulstate = !!radio_on;
3962 if (update_rfk)
3963 wan_update_rfk();
3964 return 0;
3965 }
3966 #endif
3967
3968 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3969 if (radio_on)
3970 status = TP_ACPI_WANCARD_RADIOSSW;
3971 else
3972 status = 0;
3973 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3974 return -EIO;
3975
3976 if (update_rfk)
3977 wan_update_rfk();
3978
3979 return 0;
3980 }
3981
3982 /* sysfs wan enable ---------------------------------------------------- */
3983 static ssize_t wan_enable_show(struct device *dev,
3984 struct device_attribute *attr,
3985 char *buf)
3986 {
3987 int status;
3988
3989 printk_deprecated_rfkill_attribute("wwan_enable");
3990
3991 status = wan_get_radiosw();
3992 if (status < 0)
3993 return status;
3994
3995 return snprintf(buf, PAGE_SIZE, "%d\n",
3996 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3997 }
3998
3999 static ssize_t wan_enable_store(struct device *dev,
4000 struct device_attribute *attr,
4001 const char *buf, size_t count)
4002 {
4003 unsigned long t;
4004 int res;
4005
4006 printk_deprecated_rfkill_attribute("wwan_enable");
4007
4008 if (parse_strtoul(buf, 1, &t))
4009 return -EINVAL;
4010
4011 tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
4012
4013 res = wan_set_radiosw(t, 1);
4014
4015 return (res) ? res : count;
4016 }
4017
4018 static struct device_attribute dev_attr_wan_enable =
4019 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4020 wan_enable_show, wan_enable_store);
4021
4022 /* --------------------------------------------------------------------- */
4023
4024 static struct attribute *wan_attributes[] = {
4025 &dev_attr_wan_enable.attr,
4026 NULL
4027 };
4028
4029 static const struct attribute_group wan_attr_group = {
4030 .attrs = wan_attributes,
4031 };
4032
4033 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
4034 {
4035 int wans = wan_get_radiosw();
4036
4037 if (wans < 0)
4038 return wans;
4039
4040 *state = wans;
4041 return 0;
4042 }
4043
4044 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
4045 {
4046 dbg_printk(TPACPI_DBG_RFKILL,
4047 "request to change radio state to %d\n", state);
4048 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
4049 }
4050
4051 static void wan_shutdown(void)
4052 {
4053 /* Order firmware to save current state to NVRAM */
4054 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4055 TP_ACPI_WGSV_SAVE_STATE))
4056 printk(TPACPI_NOTICE
4057 "failed to save WWAN state to NVRAM\n");
4058 else
4059 vdbg_printk(TPACPI_DBG_RFKILL,
4060 "WWAN state saved to NVRAM\n");
4061 }
4062
4063 static void wan_exit(void)
4064 {
4065 wan_shutdown();
4066
4067 if (tpacpi_wan_rfkill)
4068 rfkill_unregister(tpacpi_wan_rfkill);
4069
4070 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4071 &wan_attr_group);
4072 }
4073
4074 static int __init wan_init(struct ibm_init_struct *iibm)
4075 {
4076 int res;
4077 int status = 0;
4078
4079 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4080 "initializing wan subdriver\n");
4081
4082 TPACPI_ACPIHANDLE_INIT(hkey);
4083
4084 tp_features.wan = hkey_handle &&
4085 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4086
4087 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4088 "wan is %s, status 0x%02x\n",
4089 str_supported(tp_features.wan),
4090 status);
4091
4092 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4093 if (dbg_wwanemul) {
4094 tp_features.wan = 1;
4095 printk(TPACPI_INFO
4096 "wwan switch emulation enabled\n");
4097 } else
4098 #endif
4099 if (tp_features.wan &&
4100 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4101 /* no wan hardware present in system */
4102 tp_features.wan = 0;
4103 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4104 "wan hardware not installed\n");
4105 }
4106
4107 if (!tp_features.wan)
4108 return 1;
4109
4110 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4111 &wan_attr_group);
4112 if (res)
4113 return res;
4114
4115 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4116 &tpacpi_wan_rfkill,
4117 RFKILL_TYPE_WWAN,
4118 TPACPI_RFK_WWAN_SW_NAME,
4119 true,
4120 tpacpi_wan_rfk_set,
4121 tpacpi_wan_rfk_get);
4122 if (res) {
4123 wan_exit();
4124 return res;
4125 }
4126
4127 return 0;
4128 }
4129
4130 /* procfs -------------------------------------------------------------- */
4131 static int wan_read(char *p)
4132 {
4133 int len = 0;
4134 int status = wan_get_radiosw();
4135
4136 tpacpi_disclose_usertask("procfs wan", "read");
4137
4138 if (!tp_features.wan)
4139 len += sprintf(p + len, "status:\t\tnot supported\n");
4140 else {
4141 len += sprintf(p + len, "status:\t\t%s\n",
4142 (status == RFKILL_STATE_UNBLOCKED) ?
4143 "enabled" : "disabled");
4144 len += sprintf(p + len, "commands:\tenable, disable\n");
4145 }
4146
4147 return len;
4148 }
4149
4150 static int wan_write(char *buf)
4151 {
4152 char *cmd;
4153 int state = -1;
4154
4155 if (!tp_features.wan)
4156 return -ENODEV;
4157
4158 while ((cmd = next_cmd(&buf))) {
4159 if (strlencmp(cmd, "enable") == 0) {
4160 state = 1;
4161 } else if (strlencmp(cmd, "disable") == 0) {
4162 state = 0;
4163 } else
4164 return -EINVAL;
4165 }
4166
4167 if (state != -1) {
4168 tpacpi_disclose_usertask("procfs wan",
4169 "attempt to %s\n",
4170 state ? "enable" : "disable");
4171 wan_set_radiosw(state, 1);
4172 }
4173
4174 return 0;
4175 }
4176
4177 static struct ibm_struct wan_driver_data = {
4178 .name = "wan",
4179 .read = wan_read,
4180 .write = wan_write,
4181 .exit = wan_exit,
4182 .suspend = wan_suspend,
4183 .shutdown = wan_shutdown,
4184 };
4185
4186 /*************************************************************************
4187 * UWB subdriver
4188 */
4189
4190 enum {
4191 /* ACPI GUWB/SUWB bits */
4192 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4193 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4194 };
4195
4196 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4197
4198 static struct rfkill *tpacpi_uwb_rfkill;
4199
4200 static int uwb_get_radiosw(void)
4201 {
4202 int status;
4203
4204 if (!tp_features.uwb)
4205 return -ENODEV;
4206
4207 /* WLSW overrides UWB in firmware/hardware, reflect that */
4208 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
4209 return RFKILL_STATE_HARD_BLOCKED;
4210
4211 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4212 if (dbg_uwbemul)
4213 return (tpacpi_uwb_emulstate) ?
4214 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
4215 #endif
4216
4217 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4218 return -EIO;
4219
4220 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4221 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
4222 }
4223
4224 static void uwb_update_rfk(void)
4225 {
4226 int status;
4227
4228 if (!tpacpi_uwb_rfkill)
4229 return;
4230
4231 status = uwb_get_radiosw();
4232 if (status < 0)
4233 return;
4234 rfkill_force_state(tpacpi_uwb_rfkill, status);
4235
4236 vdbg_printk(TPACPI_DBG_RFKILL,
4237 "forced rfkill state to %d\n",
4238 status);
4239 }
4240
4241 static int uwb_set_radiosw(int radio_on, int update_rfk)
4242 {
4243 int status;
4244
4245 if (!tp_features.uwb)
4246 return -ENODEV;
4247
4248 /* WLSW overrides UWB in firmware/hardware, but there is no
4249 * reason to risk weird behaviour. */
4250 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
4251 && radio_on)
4252 return -EPERM;
4253
4254 vdbg_printk(TPACPI_DBG_RFKILL,
4255 "will %s UWB\n", radio_on ? "enable" : "disable");
4256
4257 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4258 if (dbg_uwbemul) {
4259 tpacpi_uwb_emulstate = !!radio_on;
4260 if (update_rfk)
4261 uwb_update_rfk();
4262 return 0;
4263 }
4264 #endif
4265
4266 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
4267 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4268 return -EIO;
4269
4270 if (update_rfk)
4271 uwb_update_rfk();
4272
4273 return 0;
4274 }
4275
4276 /* --------------------------------------------------------------------- */
4277
4278 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
4279 {
4280 int uwbs = uwb_get_radiosw();
4281
4282 if (uwbs < 0)
4283 return uwbs;
4284
4285 *state = uwbs;
4286 return 0;
4287 }
4288
4289 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
4290 {
4291 dbg_printk(TPACPI_DBG_RFKILL,
4292 "request to change radio state to %d\n", state);
4293 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
4294 }
4295
4296 static void uwb_exit(void)
4297 {
4298 if (tpacpi_uwb_rfkill)
4299 rfkill_unregister(tpacpi_uwb_rfkill);
4300 }
4301
4302 static int __init uwb_init(struct ibm_init_struct *iibm)
4303 {
4304 int res;
4305 int status = 0;
4306
4307 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4308 "initializing uwb subdriver\n");
4309
4310 TPACPI_ACPIHANDLE_INIT(hkey);
4311
4312 tp_features.uwb = hkey_handle &&
4313 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4314
4315 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4316 "uwb is %s, status 0x%02x\n",
4317 str_supported(tp_features.uwb),
4318 status);
4319
4320 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4321 if (dbg_uwbemul) {
4322 tp_features.uwb = 1;
4323 printk(TPACPI_INFO
4324 "uwb switch emulation enabled\n");
4325 } else
4326 #endif
4327 if (tp_features.uwb &&
4328 !(status & TP_ACPI_UWB_HWPRESENT)) {
4329 /* no uwb hardware present in system */
4330 tp_features.uwb = 0;
4331 dbg_printk(TPACPI_DBG_INIT,
4332 "uwb hardware not installed\n");
4333 }
4334
4335 if (!tp_features.uwb)
4336 return 1;
4337
4338 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4339 &tpacpi_uwb_rfkill,
4340 RFKILL_TYPE_UWB,
4341 TPACPI_RFK_UWB_SW_NAME,
4342 false,
4343 tpacpi_uwb_rfk_set,
4344 tpacpi_uwb_rfk_get);
4345
4346 return res;
4347 }
4348
4349 static struct ibm_struct uwb_driver_data = {
4350 .name = "uwb",
4351 .exit = uwb_exit,
4352 .flags.experimental = 1,
4353 };
4354
4355 /*************************************************************************
4356 * Video subdriver
4357 */
4358
4359 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4360
4361 enum video_access_mode {
4362 TPACPI_VIDEO_NONE = 0,
4363 TPACPI_VIDEO_570, /* 570 */
4364 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4365 TPACPI_VIDEO_NEW, /* all others */
4366 };
4367
4368 enum { /* video status flags, based on VIDEO_570 */
4369 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4370 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4371 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4372 };
4373
4374 enum { /* TPACPI_VIDEO_570 constants */
4375 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4376 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4377 * video_status_flags */
4378 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4379 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4380 };
4381
4382 static enum video_access_mode video_supported;
4383 static int video_orig_autosw;
4384
4385 static int video_autosw_get(void);
4386 static int video_autosw_set(int enable);
4387
4388 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4389
4390 static int __init video_init(struct ibm_init_struct *iibm)
4391 {
4392 int ivga;
4393
4394 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4395
4396 TPACPI_ACPIHANDLE_INIT(vid);
4397 TPACPI_ACPIHANDLE_INIT(vid2);
4398
4399 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4400 /* G41, assume IVGA doesn't change */
4401 vid_handle = vid2_handle;
4402
4403 if (!vid_handle)
4404 /* video switching not supported on R30, R31 */
4405 video_supported = TPACPI_VIDEO_NONE;
4406 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4407 /* 570 */
4408 video_supported = TPACPI_VIDEO_570;
4409 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4410 /* 600e/x, 770e, 770x */
4411 video_supported = TPACPI_VIDEO_770;
4412 else
4413 /* all others */
4414 video_supported = TPACPI_VIDEO_NEW;
4415
4416 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4417 str_supported(video_supported != TPACPI_VIDEO_NONE),
4418 video_supported);
4419
4420 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4421 }
4422
4423 static void video_exit(void)
4424 {
4425 dbg_printk(TPACPI_DBG_EXIT,
4426 "restoring original video autoswitch mode\n");
4427 if (video_autosw_set(video_orig_autosw))
4428 printk(TPACPI_ERR "error while trying to restore original "
4429 "video autoswitch mode\n");
4430 }
4431
4432 static int video_outputsw_get(void)
4433 {
4434 int status = 0;
4435 int i;
4436
4437 switch (video_supported) {
4438 case TPACPI_VIDEO_570:
4439 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4440 TP_ACPI_VIDEO_570_PHSCMD))
4441 return -EIO;
4442 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4443 break;
4444 case TPACPI_VIDEO_770:
4445 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4446 return -EIO;
4447 if (i)
4448 status |= TP_ACPI_VIDEO_S_LCD;
4449 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4450 return -EIO;
4451 if (i)
4452 status |= TP_ACPI_VIDEO_S_CRT;
4453 break;
4454 case TPACPI_VIDEO_NEW:
4455 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4456 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4457 return -EIO;
4458 if (i)
4459 status |= TP_ACPI_VIDEO_S_CRT;
4460
4461 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4462 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4463 return -EIO;
4464 if (i)
4465 status |= TP_ACPI_VIDEO_S_LCD;
4466 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4467 return -EIO;
4468 if (i)
4469 status |= TP_ACPI_VIDEO_S_DVI;
4470 break;
4471 default:
4472 return -ENOSYS;
4473 }
4474
4475 return status;
4476 }
4477
4478 static int video_outputsw_set(int status)
4479 {
4480 int autosw;
4481 int res = 0;
4482
4483 switch (video_supported) {
4484 case TPACPI_VIDEO_570:
4485 res = acpi_evalf(NULL, NULL,
4486 "\\_SB.PHS2", "vdd",
4487 TP_ACPI_VIDEO_570_PHS2CMD,
4488 status | TP_ACPI_VIDEO_570_PHS2SET);
4489 break;
4490 case TPACPI_VIDEO_770:
4491 autosw = video_autosw_get();
4492 if (autosw < 0)
4493 return autosw;
4494
4495 res = video_autosw_set(1);
4496 if (res)
4497 return res;
4498 res = acpi_evalf(vid_handle, NULL,
4499 "ASWT", "vdd", status * 0x100, 0);
4500 if (!autosw && video_autosw_set(autosw)) {
4501 printk(TPACPI_ERR
4502 "video auto-switch left enabled due to error\n");
4503 return -EIO;
4504 }
4505 break;
4506 case TPACPI_VIDEO_NEW:
4507 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4508 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4509 break;
4510 default:
4511 return -ENOSYS;
4512 }
4513
4514 return (res)? 0 : -EIO;
4515 }
4516
4517 static int video_autosw_get(void)
4518 {
4519 int autosw = 0;
4520
4521 switch (video_supported) {
4522 case TPACPI_VIDEO_570:
4523 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4524 return -EIO;
4525 break;
4526 case TPACPI_VIDEO_770:
4527 case TPACPI_VIDEO_NEW:
4528 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4529 return -EIO;
4530 break;
4531 default:
4532 return -ENOSYS;
4533 }
4534
4535 return autosw & 1;
4536 }
4537
4538 static int video_autosw_set(int enable)
4539 {
4540 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4541 return -EIO;
4542 return 0;
4543 }
4544
4545 static int video_outputsw_cycle(void)
4546 {
4547 int autosw = video_autosw_get();
4548 int res;
4549
4550 if (autosw < 0)
4551 return autosw;
4552
4553 switch (video_supported) {
4554 case TPACPI_VIDEO_570:
4555 res = video_autosw_set(1);
4556 if (res)
4557 return res;
4558 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4559 break;
4560 case TPACPI_VIDEO_770:
4561 case TPACPI_VIDEO_NEW:
4562 res = video_autosw_set(1);
4563 if (res)
4564 return res;
4565 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4566 break;
4567 default:
4568 return -ENOSYS;
4569 }
4570 if (!autosw && video_autosw_set(autosw)) {
4571 printk(TPACPI_ERR
4572 "video auto-switch left enabled due to error\n");
4573 return -EIO;
4574 }
4575
4576 return (res)? 0 : -EIO;
4577 }
4578
4579 static int video_expand_toggle(void)
4580 {
4581 switch (video_supported) {
4582 case TPACPI_VIDEO_570:
4583 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4584 0 : -EIO;
4585 case TPACPI_VIDEO_770:
4586 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4587 0 : -EIO;
4588 case TPACPI_VIDEO_NEW:
4589 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4590 0 : -EIO;
4591 default:
4592 return -ENOSYS;
4593 }
4594 /* not reached */
4595 }
4596
4597 static int video_read(char *p)
4598 {
4599 int status, autosw;
4600 int len = 0;
4601
4602 if (video_supported == TPACPI_VIDEO_NONE) {
4603 len += sprintf(p + len, "status:\t\tnot supported\n");
4604 return len;
4605 }
4606
4607 status = video_outputsw_get();
4608 if (status < 0)
4609 return status;
4610
4611 autosw = video_autosw_get();
4612 if (autosw < 0)
4613 return autosw;
4614
4615 len += sprintf(p + len, "status:\t\tsupported\n");
4616 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4617 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4618 if (video_supported == TPACPI_VIDEO_NEW)
4619 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4620 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4621 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4622 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4623 if (video_supported == TPACPI_VIDEO_NEW)
4624 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4625 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4626 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4627
4628 return len;
4629 }
4630
4631 static int video_write(char *buf)
4632 {
4633 char *cmd;
4634 int enable, disable, status;
4635 int res;
4636
4637 if (video_supported == TPACPI_VIDEO_NONE)
4638 return -ENODEV;
4639
4640 enable = 0;
4641 disable = 0;
4642
4643 while ((cmd = next_cmd(&buf))) {
4644 if (strlencmp(cmd, "lcd_enable") == 0) {
4645 enable |= TP_ACPI_VIDEO_S_LCD;
4646 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4647 disable |= TP_ACPI_VIDEO_S_LCD;
4648 } else if (strlencmp(cmd, "crt_enable") == 0) {
4649 enable |= TP_ACPI_VIDEO_S_CRT;
4650 } else if (strlencmp(cmd, "crt_disable") == 0) {
4651 disable |= TP_ACPI_VIDEO_S_CRT;
4652 } else if (video_supported == TPACPI_VIDEO_NEW &&
4653 strlencmp(cmd, "dvi_enable") == 0) {
4654 enable |= TP_ACPI_VIDEO_S_DVI;
4655 } else if (video_supported == TPACPI_VIDEO_NEW &&
4656 strlencmp(cmd, "dvi_disable") == 0) {
4657 disable |= TP_ACPI_VIDEO_S_DVI;
4658 } else if (strlencmp(cmd, "auto_enable") == 0) {
4659 res = video_autosw_set(1);
4660 if (res)
4661 return res;
4662 } else if (strlencmp(cmd, "auto_disable") == 0) {
4663 res = video_autosw_set(0);
4664 if (res)
4665 return res;
4666 } else if (strlencmp(cmd, "video_switch") == 0) {
4667 res = video_outputsw_cycle();
4668 if (res)
4669 return res;
4670 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4671 res = video_expand_toggle();
4672 if (res)
4673 return res;
4674 } else
4675 return -EINVAL;
4676 }
4677
4678 if (enable || disable) {
4679 status = video_outputsw_get();
4680 if (status < 0)
4681 return status;
4682 res = video_outputsw_set((status & ~disable) | enable);
4683 if (res)
4684 return res;
4685 }
4686
4687 return 0;
4688 }
4689
4690 static struct ibm_struct video_driver_data = {
4691 .name = "video",
4692 .read = video_read,
4693 .write = video_write,
4694 .exit = video_exit,
4695 };
4696
4697 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4698
4699 /*************************************************************************
4700 * Light (thinklight) subdriver
4701 */
4702
4703 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4704 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4705
4706 static int light_get_status(void)
4707 {
4708 int status = 0;
4709
4710 if (tp_features.light_status) {
4711 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4712 return -EIO;
4713 return (!!status);
4714 }
4715
4716 return -ENXIO;
4717 }
4718
4719 static int light_set_status(int status)
4720 {
4721 int rc;
4722
4723 if (tp_features.light) {
4724 if (cmos_handle) {
4725 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4726 (status)?
4727 TP_CMOS_THINKLIGHT_ON :
4728 TP_CMOS_THINKLIGHT_OFF);
4729 } else {
4730 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4731 (status)? 1 : 0);
4732 }
4733 return (rc)? 0 : -EIO;
4734 }
4735
4736 return -ENXIO;
4737 }
4738
4739 static void light_set_status_worker(struct work_struct *work)
4740 {
4741 struct tpacpi_led_classdev *data =
4742 container_of(work, struct tpacpi_led_classdev, work);
4743
4744 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4745 light_set_status((data->new_state != TPACPI_LED_OFF));
4746 }
4747
4748 static void light_sysfs_set(struct led_classdev *led_cdev,
4749 enum led_brightness brightness)
4750 {
4751 struct tpacpi_led_classdev *data =
4752 container_of(led_cdev,
4753 struct tpacpi_led_classdev,
4754 led_classdev);
4755 data->new_state = (brightness != LED_OFF) ?
4756 TPACPI_LED_ON : TPACPI_LED_OFF;
4757 queue_work(tpacpi_wq, &data->work);
4758 }
4759
4760 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4761 {
4762 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4763 }
4764
4765 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4766 .led_classdev = {
4767 .name = "tpacpi::thinklight",
4768 .brightness_set = &light_sysfs_set,
4769 .brightness_get = &light_sysfs_get,
4770 }
4771 };
4772
4773 static int __init light_init(struct ibm_init_struct *iibm)
4774 {
4775 int rc;
4776
4777 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4778
4779 TPACPI_ACPIHANDLE_INIT(ledb);
4780 TPACPI_ACPIHANDLE_INIT(lght);
4781 TPACPI_ACPIHANDLE_INIT(cmos);
4782 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4783
4784 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4785 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4786
4787 if (tp_features.light)
4788 /* light status not supported on
4789 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4790 tp_features.light_status =
4791 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4792
4793 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4794 str_supported(tp_features.light),
4795 str_supported(tp_features.light_status));
4796
4797 if (!tp_features.light)
4798 return 1;
4799
4800 rc = led_classdev_register(&tpacpi_pdev->dev,
4801 &tpacpi_led_thinklight.led_classdev);
4802
4803 if (rc < 0) {
4804 tp_features.light = 0;
4805 tp_features.light_status = 0;
4806 } else {
4807 rc = 0;
4808 }
4809
4810 return rc;
4811 }
4812
4813 static void light_exit(void)
4814 {
4815 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4816 if (work_pending(&tpacpi_led_thinklight.work))
4817 flush_workqueue(tpacpi_wq);
4818 }
4819
4820 static int light_read(char *p)
4821 {
4822 int len = 0;
4823 int status;
4824
4825 if (!tp_features.light) {
4826 len += sprintf(p + len, "status:\t\tnot supported\n");
4827 } else if (!tp_features.light_status) {
4828 len += sprintf(p + len, "status:\t\tunknown\n");
4829 len += sprintf(p + len, "commands:\ton, off\n");
4830 } else {
4831 status = light_get_status();
4832 if (status < 0)
4833 return status;
4834 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4835 len += sprintf(p + len, "commands:\ton, off\n");
4836 }
4837
4838 return len;
4839 }
4840
4841 static int light_write(char *buf)
4842 {
4843 char *cmd;
4844 int newstatus = 0;
4845
4846 if (!tp_features.light)
4847 return -ENODEV;
4848
4849 while ((cmd = next_cmd(&buf))) {
4850 if (strlencmp(cmd, "on") == 0) {
4851 newstatus = 1;
4852 } else if (strlencmp(cmd, "off") == 0) {
4853 newstatus = 0;
4854 } else
4855 return -EINVAL;
4856 }
4857
4858 return light_set_status(newstatus);
4859 }
4860
4861 static struct ibm_struct light_driver_data = {
4862 .name = "light",
4863 .read = light_read,
4864 .write = light_write,
4865 .exit = light_exit,
4866 };
4867
4868 /*************************************************************************
4869 * CMOS subdriver
4870 */
4871
4872 /* sysfs cmos_command -------------------------------------------------- */
4873 static ssize_t cmos_command_store(struct device *dev,
4874 struct device_attribute *attr,
4875 const char *buf, size_t count)
4876 {
4877 unsigned long cmos_cmd;
4878 int res;
4879
4880 if (parse_strtoul(buf, 21, &cmos_cmd))
4881 return -EINVAL;
4882
4883 res = issue_thinkpad_cmos_command(cmos_cmd);
4884 return (res)? res : count;
4885 }
4886
4887 static struct device_attribute dev_attr_cmos_command =
4888 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4889
4890 /* --------------------------------------------------------------------- */
4891
4892 static int __init cmos_init(struct ibm_init_struct *iibm)
4893 {
4894 int res;
4895
4896 vdbg_printk(TPACPI_DBG_INIT,
4897 "initializing cmos commands subdriver\n");
4898
4899 TPACPI_ACPIHANDLE_INIT(cmos);
4900
4901 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4902 str_supported(cmos_handle != NULL));
4903
4904 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4905 if (res)
4906 return res;
4907
4908 return (cmos_handle)? 0 : 1;
4909 }
4910
4911 static void cmos_exit(void)
4912 {
4913 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4914 }
4915
4916 static int cmos_read(char *p)
4917 {
4918 int len = 0;
4919
4920 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4921 R30, R31, T20-22, X20-21 */
4922 if (!cmos_handle)
4923 len += sprintf(p + len, "status:\t\tnot supported\n");
4924 else {
4925 len += sprintf(p + len, "status:\t\tsupported\n");
4926 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4927 }
4928
4929 return len;
4930 }
4931
4932 static int cmos_write(char *buf)
4933 {
4934 char *cmd;
4935 int cmos_cmd, res;
4936
4937 while ((cmd = next_cmd(&buf))) {
4938 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4939 cmos_cmd >= 0 && cmos_cmd <= 21) {
4940 /* cmos_cmd set */
4941 } else
4942 return -EINVAL;
4943
4944 res = issue_thinkpad_cmos_command(cmos_cmd);
4945 if (res)
4946 return res;
4947 }
4948
4949 return 0;
4950 }
4951
4952 static struct ibm_struct cmos_driver_data = {
4953 .name = "cmos",
4954 .read = cmos_read,
4955 .write = cmos_write,
4956 .exit = cmos_exit,
4957 };
4958
4959 /*************************************************************************
4960 * LED subdriver
4961 */
4962
4963 enum led_access_mode {
4964 TPACPI_LED_NONE = 0,
4965 TPACPI_LED_570, /* 570 */
4966 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4967 TPACPI_LED_NEW, /* all others */
4968 };
4969
4970 enum { /* For TPACPI_LED_OLD */
4971 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4972 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4973 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4974 };
4975
4976 static enum led_access_mode led_supported;
4977
4978 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4979 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4980 /* T20-22, X20-21 */
4981 "LED", /* all others */
4982 ); /* R30, R31 */
4983
4984 #define TPACPI_LED_NUMLEDS 16
4985 static struct tpacpi_led_classdev *tpacpi_leds;
4986 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4987 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4988 /* there's a limit of 19 chars + NULL before 2.6.26 */
4989 "tpacpi::power",
4990 "tpacpi:orange:batt",
4991 "tpacpi:green:batt",
4992 "tpacpi::dock_active",
4993 "tpacpi::bay_active",
4994 "tpacpi::dock_batt",
4995 "tpacpi::unknown_led",
4996 "tpacpi::standby",
4997 "tpacpi::dock_status1",
4998 "tpacpi::dock_status2",
4999 "tpacpi::unknown_led2",
5000 "tpacpi::unknown_led3",
5001 "tpacpi::thinkvantage",
5002 };
5003 #define TPACPI_SAFE_LEDS 0x1081U
5004
5005 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5006 {
5007 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5008 return false;
5009 #else
5010 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5011 #endif
5012 }
5013
5014 static int led_get_status(const unsigned int led)
5015 {
5016 int status;
5017 enum led_status_t led_s;
5018
5019 switch (led_supported) {
5020 case TPACPI_LED_570:
5021 if (!acpi_evalf(ec_handle,
5022 &status, "GLED", "dd", 1 << led))
5023 return -EIO;
5024 led_s = (status == 0)?
5025 TPACPI_LED_OFF :
5026 ((status == 1)?
5027 TPACPI_LED_ON :
5028 TPACPI_LED_BLINK);
5029 tpacpi_led_state_cache[led] = led_s;
5030 return led_s;
5031 default:
5032 return -ENXIO;
5033 }
5034
5035 /* not reached */
5036 }
5037
5038 static int led_set_status(const unsigned int led,
5039 const enum led_status_t ledstatus)
5040 {
5041 /* off, on, blink. Index is led_status_t */
5042 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5043 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5044
5045 int rc = 0;
5046
5047 switch (led_supported) {
5048 case TPACPI_LED_570:
5049 /* 570 */
5050 if (unlikely(led > 7))
5051 return -EINVAL;
5052 if (unlikely(tpacpi_is_led_restricted(led)))
5053 return -EPERM;
5054 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5055 (1 << led), led_sled_arg1[ledstatus]))
5056 rc = -EIO;
5057 break;
5058 case TPACPI_LED_OLD:
5059 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5060 if (unlikely(led > 7))
5061 return -EINVAL;
5062 if (unlikely(tpacpi_is_led_restricted(led)))
5063 return -EPERM;
5064 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5065 if (rc >= 0)
5066 rc = ec_write(TPACPI_LED_EC_HLBL,
5067 (ledstatus == TPACPI_LED_BLINK) << led);
5068 if (rc >= 0)
5069 rc = ec_write(TPACPI_LED_EC_HLCL,
5070 (ledstatus != TPACPI_LED_OFF) << led);
5071 break;
5072 case TPACPI_LED_NEW:
5073 /* all others */
5074 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5075 return -EINVAL;
5076 if (unlikely(tpacpi_is_led_restricted(led)))
5077 return -EPERM;
5078 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5079 led, led_led_arg1[ledstatus]))
5080 rc = -EIO;
5081 break;
5082 default:
5083 rc = -ENXIO;
5084 }
5085
5086 if (!rc)
5087 tpacpi_led_state_cache[led] = ledstatus;
5088
5089 return rc;
5090 }
5091
5092 static void led_set_status_worker(struct work_struct *work)
5093 {
5094 struct tpacpi_led_classdev *data =
5095 container_of(work, struct tpacpi_led_classdev, work);
5096
5097 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5098 led_set_status(data->led, data->new_state);
5099 }
5100
5101 static void led_sysfs_set(struct led_classdev *led_cdev,
5102 enum led_brightness brightness)
5103 {
5104 struct tpacpi_led_classdev *data = container_of(led_cdev,
5105 struct tpacpi_led_classdev, led_classdev);
5106
5107 if (brightness == LED_OFF)
5108 data->new_state = TPACPI_LED_OFF;
5109 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5110 data->new_state = TPACPI_LED_ON;
5111 else
5112 data->new_state = TPACPI_LED_BLINK;
5113
5114 queue_work(tpacpi_wq, &data->work);
5115 }
5116
5117 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5118 unsigned long *delay_on, unsigned long *delay_off)
5119 {
5120 struct tpacpi_led_classdev *data = container_of(led_cdev,
5121 struct tpacpi_led_classdev, led_classdev);
5122
5123 /* Can we choose the flash rate? */
5124 if (*delay_on == 0 && *delay_off == 0) {
5125 /* yes. set them to the hardware blink rate (1 Hz) */
5126 *delay_on = 500; /* ms */
5127 *delay_off = 500; /* ms */
5128 } else if ((*delay_on != 500) || (*delay_off != 500))
5129 return -EINVAL;
5130
5131 data->new_state = TPACPI_LED_BLINK;
5132 queue_work(tpacpi_wq, &data->work);
5133
5134 return 0;
5135 }
5136
5137 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5138 {
5139 int rc;
5140
5141 struct tpacpi_led_classdev *data = container_of(led_cdev,
5142 struct tpacpi_led_classdev, led_classdev);
5143
5144 rc = led_get_status(data->led);
5145
5146 if (rc == TPACPI_LED_OFF || rc < 0)
5147 rc = LED_OFF; /* no error handling in led class :( */
5148 else
5149 rc = LED_FULL;
5150
5151 return rc;
5152 }
5153
5154 static void led_exit(void)
5155 {
5156 unsigned int i;
5157
5158 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5159 if (tpacpi_leds[i].led_classdev.name)
5160 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5161 }
5162
5163 kfree(tpacpi_leds);
5164 }
5165
5166 static int __init tpacpi_init_led(unsigned int led)
5167 {
5168 int rc;
5169
5170 tpacpi_leds[led].led = led;
5171
5172 /* LEDs with no name don't get registered */
5173 if (!tpacpi_led_names[led])
5174 return 0;
5175
5176 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5177 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5178 if (led_supported == TPACPI_LED_570)
5179 tpacpi_leds[led].led_classdev.brightness_get =
5180 &led_sysfs_get;
5181
5182 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5183
5184 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5185
5186 rc = led_classdev_register(&tpacpi_pdev->dev,
5187 &tpacpi_leds[led].led_classdev);
5188 if (rc < 0)
5189 tpacpi_leds[led].led_classdev.name = NULL;
5190
5191 return rc;
5192 }
5193
5194 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5195 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5196 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5197 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5198
5199 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5200 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5201 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5202 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5203 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5204 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5205 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5206 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5207
5208 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5209 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5210 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5211 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5212 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5213
5214 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5215 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5216 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5217 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5218
5219 /* (1) - may have excess leds enabled on MSB */
5220
5221 /* Defaults (order matters, keep last, don't reorder!) */
5222 { /* Lenovo */
5223 .vendor = PCI_VENDOR_ID_LENOVO,
5224 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5225 .quirks = 0x1fffU,
5226 },
5227 { /* IBM ThinkPads with no EC version string */
5228 .vendor = PCI_VENDOR_ID_IBM,
5229 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5230 .quirks = 0x00ffU,
5231 },
5232 { /* IBM ThinkPads with EC version string */
5233 .vendor = PCI_VENDOR_ID_IBM,
5234 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5235 .quirks = 0x00bfU,
5236 },
5237 };
5238
5239 #undef TPACPI_LEDQ_IBM
5240 #undef TPACPI_LEDQ_LNV
5241
5242 static int __init led_init(struct ibm_init_struct *iibm)
5243 {
5244 unsigned int i;
5245 int rc;
5246 unsigned long useful_leds;
5247
5248 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5249
5250 TPACPI_ACPIHANDLE_INIT(led);
5251
5252 if (!led_handle)
5253 /* led not supported on R30, R31 */
5254 led_supported = TPACPI_LED_NONE;
5255 else if (strlencmp(led_path, "SLED") == 0)
5256 /* 570 */
5257 led_supported = TPACPI_LED_570;
5258 else if (strlencmp(led_path, "SYSL") == 0)
5259 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5260 led_supported = TPACPI_LED_OLD;
5261 else
5262 /* all others */
5263 led_supported = TPACPI_LED_NEW;
5264
5265 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5266 str_supported(led_supported), led_supported);
5267
5268 if (led_supported == TPACPI_LED_NONE)
5269 return 1;
5270
5271 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5272 GFP_KERNEL);
5273 if (!tpacpi_leds) {
5274 printk(TPACPI_ERR "Out of memory for LED data\n");
5275 return -ENOMEM;
5276 }
5277
5278 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5279 ARRAY_SIZE(led_useful_qtable));
5280
5281 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5282 if (!tpacpi_is_led_restricted(i) &&
5283 test_bit(i, &useful_leds)) {
5284 rc = tpacpi_init_led(i);
5285 if (rc < 0) {
5286 led_exit();
5287 return rc;
5288 }
5289 }
5290 }
5291
5292 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5293 printk(TPACPI_NOTICE
5294 "warning: userspace override of important "
5295 "firmware LEDs is enabled\n");
5296 #endif
5297 return 0;
5298 }
5299
5300 #define str_led_status(s) \
5301 ((s) == TPACPI_LED_OFF ? "off" : \
5302 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5303
5304 static int led_read(char *p)
5305 {
5306 int len = 0;
5307
5308 if (!led_supported) {
5309 len += sprintf(p + len, "status:\t\tnot supported\n");
5310 return len;
5311 }
5312 len += sprintf(p + len, "status:\t\tsupported\n");
5313
5314 if (led_supported == TPACPI_LED_570) {
5315 /* 570 */
5316 int i, status;
5317 for (i = 0; i < 8; i++) {
5318 status = led_get_status(i);
5319 if (status < 0)
5320 return -EIO;
5321 len += sprintf(p + len, "%d:\t\t%s\n",
5322 i, str_led_status(status));
5323 }
5324 }
5325
5326 len += sprintf(p + len, "commands:\t"
5327 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5328
5329 return len;
5330 }
5331
5332 static int led_write(char *buf)
5333 {
5334 char *cmd;
5335 int led, rc;
5336 enum led_status_t s;
5337
5338 if (!led_supported)
5339 return -ENODEV;
5340
5341 while ((cmd = next_cmd(&buf))) {
5342 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5343 return -EINVAL;
5344
5345 if (strstr(cmd, "off")) {
5346 s = TPACPI_LED_OFF;
5347 } else if (strstr(cmd, "on")) {
5348 s = TPACPI_LED_ON;
5349 } else if (strstr(cmd, "blink")) {
5350 s = TPACPI_LED_BLINK;
5351 } else {
5352 return -EINVAL;
5353 }
5354
5355 rc = led_set_status(led, s);
5356 if (rc < 0)
5357 return rc;
5358 }
5359
5360 return 0;
5361 }
5362
5363 static struct ibm_struct led_driver_data = {
5364 .name = "led",
5365 .read = led_read,
5366 .write = led_write,
5367 .exit = led_exit,
5368 };
5369
5370 /*************************************************************************
5371 * Beep subdriver
5372 */
5373
5374 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5375
5376 #define TPACPI_BEEP_Q1 0x0001
5377
5378 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5379 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5380 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5381 };
5382
5383 static int __init beep_init(struct ibm_init_struct *iibm)
5384 {
5385 unsigned long quirks;
5386
5387 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5388
5389 TPACPI_ACPIHANDLE_INIT(beep);
5390
5391 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5392 str_supported(beep_handle != NULL));
5393
5394 quirks = tpacpi_check_quirks(beep_quirk_table,
5395 ARRAY_SIZE(beep_quirk_table));
5396
5397 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5398
5399 return (beep_handle)? 0 : 1;
5400 }
5401
5402 static int beep_read(char *p)
5403 {
5404 int len = 0;
5405
5406 if (!beep_handle)
5407 len += sprintf(p + len, "status:\t\tnot supported\n");
5408 else {
5409 len += sprintf(p + len, "status:\t\tsupported\n");
5410 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5411 }
5412
5413 return len;
5414 }
5415
5416 static int beep_write(char *buf)
5417 {
5418 char *cmd;
5419 int beep_cmd;
5420
5421 if (!beep_handle)
5422 return -ENODEV;
5423
5424 while ((cmd = next_cmd(&buf))) {
5425 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5426 beep_cmd >= 0 && beep_cmd <= 17) {
5427 /* beep_cmd set */
5428 } else
5429 return -EINVAL;
5430 if (tp_features.beep_needs_two_args) {
5431 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5432 beep_cmd, 0))
5433 return -EIO;
5434 } else {
5435 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5436 beep_cmd))
5437 return -EIO;
5438 }
5439 }
5440
5441 return 0;
5442 }
5443
5444 static struct ibm_struct beep_driver_data = {
5445 .name = "beep",
5446 .read = beep_read,
5447 .write = beep_write,
5448 };
5449
5450 /*************************************************************************
5451 * Thermal subdriver
5452 */
5453
5454 enum thermal_access_mode {
5455 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5456 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5457 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5458 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5459 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5460 };
5461
5462 enum { /* TPACPI_THERMAL_TPEC_* */
5463 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5464 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5465 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5466
5467 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5468 };
5469
5470
5471 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5472 struct ibm_thermal_sensors_struct {
5473 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5474 };
5475
5476 static enum thermal_access_mode thermal_read_mode;
5477
5478 /* idx is zero-based */
5479 static int thermal_get_sensor(int idx, s32 *value)
5480 {
5481 int t;
5482 s8 tmp;
5483 char tmpi[5];
5484
5485 t = TP_EC_THERMAL_TMP0;
5486
5487 switch (thermal_read_mode) {
5488 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5489 case TPACPI_THERMAL_TPEC_16:
5490 if (idx >= 8 && idx <= 15) {
5491 t = TP_EC_THERMAL_TMP8;
5492 idx -= 8;
5493 }
5494 /* fallthrough */
5495 #endif
5496 case TPACPI_THERMAL_TPEC_8:
5497 if (idx <= 7) {
5498 if (!acpi_ec_read(t + idx, &tmp))
5499 return -EIO;
5500 *value = tmp * 1000;
5501 return 0;
5502 }
5503 break;
5504
5505 case TPACPI_THERMAL_ACPI_UPDT:
5506 if (idx <= 7) {
5507 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5508 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5509 return -EIO;
5510 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5511 return -EIO;
5512 *value = (t - 2732) * 100;
5513 return 0;
5514 }
5515 break;
5516
5517 case TPACPI_THERMAL_ACPI_TMP07:
5518 if (idx <= 7) {
5519 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5520 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5521 return -EIO;
5522 if (t > 127 || t < -127)
5523 t = TP_EC_THERMAL_TMP_NA;
5524 *value = t * 1000;
5525 return 0;
5526 }
5527 break;
5528
5529 case TPACPI_THERMAL_NONE:
5530 default:
5531 return -ENOSYS;
5532 }
5533
5534 return -EINVAL;
5535 }
5536
5537 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5538 {
5539 int res, i;
5540 int n;
5541
5542 n = 8;
5543 i = 0;
5544
5545 if (!s)
5546 return -EINVAL;
5547
5548 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5549 n = 16;
5550
5551 for (i = 0 ; i < n; i++) {
5552 res = thermal_get_sensor(i, &s->temp[i]);
5553 if (res)
5554 return res;
5555 }
5556
5557 return n;
5558 }
5559
5560 static void thermal_dump_all_sensors(void)
5561 {
5562 int n, i;
5563 struct ibm_thermal_sensors_struct t;
5564
5565 n = thermal_get_sensors(&t);
5566 if (n <= 0)
5567 return;
5568
5569 printk(TPACPI_NOTICE
5570 "temperatures (Celsius):");
5571
5572 for (i = 0; i < n; i++) {
5573 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5574 printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5575 else
5576 printk(KERN_CONT " N/A");
5577 }
5578
5579 printk(KERN_CONT "\n");
5580 }
5581
5582 /* sysfs temp##_input -------------------------------------------------- */
5583
5584 static ssize_t thermal_temp_input_show(struct device *dev,
5585 struct device_attribute *attr,
5586 char *buf)
5587 {
5588 struct sensor_device_attribute *sensor_attr =
5589 to_sensor_dev_attr(attr);
5590 int idx = sensor_attr->index;
5591 s32 value;
5592 int res;
5593
5594 res = thermal_get_sensor(idx, &value);
5595 if (res)
5596 return res;
5597 if (value == TPACPI_THERMAL_SENSOR_NA)
5598 return -ENXIO;
5599
5600 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5601 }
5602
5603 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5604 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5605 thermal_temp_input_show, NULL, _idxB)
5606
5607 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5608 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5609 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5610 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5611 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5612 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5613 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5614 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5615 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5616 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5617 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5618 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5619 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5620 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5621 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5622 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5623 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5624 };
5625
5626 #define THERMAL_ATTRS(X) \
5627 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5628
5629 static struct attribute *thermal_temp_input_attr[] = {
5630 THERMAL_ATTRS(8),
5631 THERMAL_ATTRS(9),
5632 THERMAL_ATTRS(10),
5633 THERMAL_ATTRS(11),
5634 THERMAL_ATTRS(12),
5635 THERMAL_ATTRS(13),
5636 THERMAL_ATTRS(14),
5637 THERMAL_ATTRS(15),
5638 THERMAL_ATTRS(0),
5639 THERMAL_ATTRS(1),
5640 THERMAL_ATTRS(2),
5641 THERMAL_ATTRS(3),
5642 THERMAL_ATTRS(4),
5643 THERMAL_ATTRS(5),
5644 THERMAL_ATTRS(6),
5645 THERMAL_ATTRS(7),
5646 NULL
5647 };
5648
5649 static const struct attribute_group thermal_temp_input16_group = {
5650 .attrs = thermal_temp_input_attr
5651 };
5652
5653 static const struct attribute_group thermal_temp_input8_group = {
5654 .attrs = &thermal_temp_input_attr[8]
5655 };
5656
5657 #undef THERMAL_SENSOR_ATTR_TEMP
5658 #undef THERMAL_ATTRS
5659
5660 /* --------------------------------------------------------------------- */
5661
5662 static int __init thermal_init(struct ibm_init_struct *iibm)
5663 {
5664 u8 t, ta1, ta2;
5665 int i;
5666 int acpi_tmp7;
5667 int res;
5668
5669 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5670
5671 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5672
5673 if (thinkpad_id.ec_model) {
5674 /*
5675 * Direct EC access mode: sensors at registers
5676 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5677 * non-implemented, thermal sensors return 0x80 when
5678 * not available
5679 */
5680
5681 ta1 = ta2 = 0;
5682 for (i = 0; i < 8; i++) {
5683 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5684 ta1 |= t;
5685 } else {
5686 ta1 = 0;
5687 break;
5688 }
5689 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5690 ta2 |= t;
5691 } else {
5692 ta1 = 0;
5693 break;
5694 }
5695 }
5696 if (ta1 == 0) {
5697 /* This is sheer paranoia, but we handle it anyway */
5698 if (acpi_tmp7) {
5699 printk(TPACPI_ERR
5700 "ThinkPad ACPI EC access misbehaving, "
5701 "falling back to ACPI TMPx access "
5702 "mode\n");
5703 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5704 } else {
5705 printk(TPACPI_ERR
5706 "ThinkPad ACPI EC access misbehaving, "
5707 "disabling thermal sensors access\n");
5708 thermal_read_mode = TPACPI_THERMAL_NONE;
5709 }
5710 } else {
5711 thermal_read_mode =
5712 (ta2 != 0) ?
5713 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5714 }
5715 } else if (acpi_tmp7) {
5716 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5717 /* 600e/x, 770e, 770x */
5718 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5719 } else {
5720 /* Standard ACPI TMPx access, max 8 sensors */
5721 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5722 }
5723 } else {
5724 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5725 thermal_read_mode = TPACPI_THERMAL_NONE;
5726 }
5727
5728 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5729 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5730 thermal_read_mode);
5731
5732 switch (thermal_read_mode) {
5733 case TPACPI_THERMAL_TPEC_16:
5734 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5735 &thermal_temp_input16_group);
5736 if (res)
5737 return res;
5738 break;
5739 case TPACPI_THERMAL_TPEC_8:
5740 case TPACPI_THERMAL_ACPI_TMP07:
5741 case TPACPI_THERMAL_ACPI_UPDT:
5742 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5743 &thermal_temp_input8_group);
5744 if (res)
5745 return res;
5746 break;
5747 case TPACPI_THERMAL_NONE:
5748 default:
5749 return 1;
5750 }
5751
5752 return 0;
5753 }
5754
5755 static void thermal_exit(void)
5756 {
5757 switch (thermal_read_mode) {
5758 case TPACPI_THERMAL_TPEC_16:
5759 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5760 &thermal_temp_input16_group);
5761 break;
5762 case TPACPI_THERMAL_TPEC_8:
5763 case TPACPI_THERMAL_ACPI_TMP07:
5764 case TPACPI_THERMAL_ACPI_UPDT:
5765 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5766 &thermal_temp_input16_group);
5767 break;
5768 case TPACPI_THERMAL_NONE:
5769 default:
5770 break;
5771 }
5772 }
5773
5774 static int thermal_read(char *p)
5775 {
5776 int len = 0;
5777 int n, i;
5778 struct ibm_thermal_sensors_struct t;
5779
5780 n = thermal_get_sensors(&t);
5781 if (unlikely(n < 0))
5782 return n;
5783
5784 len += sprintf(p + len, "temperatures:\t");
5785
5786 if (n > 0) {
5787 for (i = 0; i < (n - 1); i++)
5788 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5789 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5790 } else
5791 len += sprintf(p + len, "not supported\n");
5792
5793 return len;
5794 }
5795
5796 static struct ibm_struct thermal_driver_data = {
5797 .name = "thermal",
5798 .read = thermal_read,
5799 .exit = thermal_exit,
5800 };
5801
5802 /*************************************************************************
5803 * EC Dump subdriver
5804 */
5805
5806 static u8 ecdump_regs[256];
5807
5808 static int ecdump_read(char *p)
5809 {
5810 int len = 0;
5811 int i, j;
5812 u8 v;
5813
5814 len += sprintf(p + len, "EC "
5815 " +00 +01 +02 +03 +04 +05 +06 +07"
5816 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5817 for (i = 0; i < 256; i += 16) {
5818 len += sprintf(p + len, "EC 0x%02x:", i);
5819 for (j = 0; j < 16; j++) {
5820 if (!acpi_ec_read(i + j, &v))
5821 break;
5822 if (v != ecdump_regs[i + j])
5823 len += sprintf(p + len, " *%02x", v);
5824 else
5825 len += sprintf(p + len, " %02x", v);
5826 ecdump_regs[i + j] = v;
5827 }
5828 len += sprintf(p + len, "\n");
5829 if (j != 16)
5830 break;
5831 }
5832
5833 /* These are way too dangerous to advertise openly... */
5834 #if 0
5835 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5836 " (<offset> is 00-ff, <value> is 00-ff)\n");
5837 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5838 " (<offset> is 00-ff, <value> is 0-255)\n");
5839 #endif
5840 return len;
5841 }
5842
5843 static int ecdump_write(char *buf)
5844 {
5845 char *cmd;
5846 int i, v;
5847
5848 while ((cmd = next_cmd(&buf))) {
5849 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5850 /* i and v set */
5851 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5852 /* i and v set */
5853 } else
5854 return -EINVAL;
5855 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5856 if (!acpi_ec_write(i, v))
5857 return -EIO;
5858 } else
5859 return -EINVAL;
5860 }
5861
5862 return 0;
5863 }
5864
5865 static struct ibm_struct ecdump_driver_data = {
5866 .name = "ecdump",
5867 .read = ecdump_read,
5868 .write = ecdump_write,
5869 .flags.experimental = 1,
5870 };
5871
5872 /*************************************************************************
5873 * Backlight/brightness subdriver
5874 */
5875
5876 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5877
5878 /*
5879 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5880 * CMOS NVRAM byte 0x5E, bits 0-3.
5881 *
5882 * EC HBRV (0x31) has the following layout
5883 * Bit 7: unknown function
5884 * Bit 6: unknown function
5885 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5886 * Bit 4: must be set to zero to avoid problems
5887 * Bit 3-0: backlight brightness level
5888 *
5889 * brightness_get_raw returns status data in the HBRV layout
5890 *
5891 * WARNING: The X61 has been verified to use HBRV for something else, so
5892 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5893 * testing on the very early *60 Lenovo models...
5894 */
5895
5896 enum {
5897 TP_EC_BACKLIGHT = 0x31,
5898
5899 /* TP_EC_BACKLIGHT bitmasks */
5900 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5901 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5902 TP_EC_BACKLIGHT_MAPSW = 0x20,
5903 };
5904
5905 enum tpacpi_brightness_access_mode {
5906 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5907 TPACPI_BRGHT_MODE_EC, /* EC control */
5908 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5909 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5910 TPACPI_BRGHT_MODE_MAX
5911 };
5912
5913 static struct backlight_device *ibm_backlight_device;
5914
5915 static enum tpacpi_brightness_access_mode brightness_mode =
5916 TPACPI_BRGHT_MODE_MAX;
5917
5918 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5919
5920 static struct mutex brightness_mutex;
5921
5922 /* NVRAM brightness access,
5923 * call with brightness_mutex held! */
5924 static unsigned int tpacpi_brightness_nvram_get(void)
5925 {
5926 u8 lnvram;
5927
5928 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5929 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5930 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5931 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5932
5933 return lnvram;
5934 }
5935
5936 static void tpacpi_brightness_checkpoint_nvram(void)
5937 {
5938 u8 lec = 0;
5939 u8 b_nvram;
5940
5941 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5942 return;
5943
5944 vdbg_printk(TPACPI_DBG_BRGHT,
5945 "trying to checkpoint backlight level to NVRAM...\n");
5946
5947 if (mutex_lock_killable(&brightness_mutex) < 0)
5948 return;
5949
5950 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5951 goto unlock;
5952 lec &= TP_EC_BACKLIGHT_LVLMSK;
5953 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5954
5955 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5956 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5957 /* NVRAM needs update */
5958 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5959 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5960 b_nvram |= lec;
5961 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5962 dbg_printk(TPACPI_DBG_BRGHT,
5963 "updated NVRAM backlight level to %u (0x%02x)\n",
5964 (unsigned int) lec, (unsigned int) b_nvram);
5965 } else
5966 vdbg_printk(TPACPI_DBG_BRGHT,
5967 "NVRAM backlight level already is %u (0x%02x)\n",
5968 (unsigned int) lec, (unsigned int) b_nvram);
5969
5970 unlock:
5971 mutex_unlock(&brightness_mutex);
5972 }
5973
5974
5975 /* call with brightness_mutex held! */
5976 static int tpacpi_brightness_get_raw(int *status)
5977 {
5978 u8 lec = 0;
5979
5980 switch (brightness_mode) {
5981 case TPACPI_BRGHT_MODE_UCMS_STEP:
5982 *status = tpacpi_brightness_nvram_get();
5983 return 0;
5984 case TPACPI_BRGHT_MODE_EC:
5985 case TPACPI_BRGHT_MODE_ECNVRAM:
5986 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5987 return -EIO;
5988 *status = lec;
5989 return 0;
5990 default:
5991 return -ENXIO;
5992 }
5993 }
5994
5995 /* call with brightness_mutex held! */
5996 /* do NOT call with illegal backlight level value */
5997 static int tpacpi_brightness_set_ec(unsigned int value)
5998 {
5999 u8 lec = 0;
6000
6001 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6002 return -EIO;
6003
6004 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6005 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6006 (value & TP_EC_BACKLIGHT_LVLMSK))))
6007 return -EIO;
6008
6009 return 0;
6010 }
6011
6012 /* call with brightness_mutex held! */
6013 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6014 {
6015 int cmos_cmd, inc;
6016 unsigned int current_value, i;
6017
6018 current_value = tpacpi_brightness_nvram_get();
6019
6020 if (value == current_value)
6021 return 0;
6022
6023 cmos_cmd = (value > current_value) ?
6024 TP_CMOS_BRIGHTNESS_UP :
6025 TP_CMOS_BRIGHTNESS_DOWN;
6026 inc = (value > current_value) ? 1 : -1;
6027
6028 for (i = current_value; i != value; i += inc)
6029 if (issue_thinkpad_cmos_command(cmos_cmd))
6030 return -EIO;
6031
6032 return 0;
6033 }
6034
6035 /* May return EINTR which can always be mapped to ERESTARTSYS */
6036 static int brightness_set(unsigned int value)
6037 {
6038 int res;
6039
6040 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6041 value < 0)
6042 return -EINVAL;
6043
6044 vdbg_printk(TPACPI_DBG_BRGHT,
6045 "set backlight level to %d\n", value);
6046
6047 res = mutex_lock_killable(&brightness_mutex);
6048 if (res < 0)
6049 return res;
6050
6051 switch (brightness_mode) {
6052 case TPACPI_BRGHT_MODE_EC:
6053 case TPACPI_BRGHT_MODE_ECNVRAM:
6054 res = tpacpi_brightness_set_ec(value);
6055 break;
6056 case TPACPI_BRGHT_MODE_UCMS_STEP:
6057 res = tpacpi_brightness_set_ucmsstep(value);
6058 break;
6059 default:
6060 res = -ENXIO;
6061 }
6062
6063 mutex_unlock(&brightness_mutex);
6064 return res;
6065 }
6066
6067 /* sysfs backlight class ----------------------------------------------- */
6068
6069 static int brightness_update_status(struct backlight_device *bd)
6070 {
6071 unsigned int level =
6072 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6073 bd->props.power == FB_BLANK_UNBLANK) ?
6074 bd->props.brightness : 0;
6075
6076 dbg_printk(TPACPI_DBG_BRGHT,
6077 "backlight: attempt to set level to %d\n",
6078 level);
6079
6080 /* it is the backlight class's job (caller) to handle
6081 * EINTR and other errors properly */
6082 return brightness_set(level);
6083 }
6084
6085 static int brightness_get(struct backlight_device *bd)
6086 {
6087 int status, res;
6088
6089 res = mutex_lock_killable(&brightness_mutex);
6090 if (res < 0)
6091 return 0;
6092
6093 res = tpacpi_brightness_get_raw(&status);
6094
6095 mutex_unlock(&brightness_mutex);
6096
6097 if (res < 0)
6098 return 0;
6099
6100 return status & TP_EC_BACKLIGHT_LVLMSK;
6101 }
6102
6103 static void tpacpi_brightness_notify_change(void)
6104 {
6105 backlight_force_update(ibm_backlight_device,
6106 BACKLIGHT_UPDATE_HOTKEY);
6107 }
6108
6109 static struct backlight_ops ibm_backlight_data = {
6110 .get_brightness = brightness_get,
6111 .update_status = brightness_update_status,
6112 };
6113
6114 /* --------------------------------------------------------------------- */
6115
6116 /*
6117 * These are only useful for models that have only one possibility
6118 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6119 * these quirks.
6120 */
6121 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6122 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6123 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6124
6125 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6126 /* Models with ATI GPUs known to require ECNVRAM mode */
6127 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6128
6129 /* Models with ATI GPUs that can use ECNVRAM */
6130 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6131 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6132 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6133 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6134
6135 /* Models with Intel Extreme Graphics 2 */
6136 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6137 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6138 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6139
6140 /* Models with Intel GMA900 */
6141 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6142 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6143 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6144 };
6145
6146 static int __init brightness_init(struct ibm_init_struct *iibm)
6147 {
6148 int b;
6149 unsigned long quirks;
6150
6151 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6152
6153 mutex_init(&brightness_mutex);
6154
6155 quirks = tpacpi_check_quirks(brightness_quirk_table,
6156 ARRAY_SIZE(brightness_quirk_table));
6157
6158 /*
6159 * We always attempt to detect acpi support, so as to switch
6160 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6161 * going to publish a backlight interface
6162 */
6163 b = tpacpi_check_std_acpi_brightness_support();
6164 if (b > 0) {
6165 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
6166 printk(TPACPI_NOTICE
6167 "Lenovo BIOS switched to ACPI backlight "
6168 "control mode\n");
6169 }
6170 if (brightness_enable > 1) {
6171 printk(TPACPI_NOTICE
6172 "standard ACPI backlight interface "
6173 "available, not loading native one...\n");
6174 return 1;
6175 }
6176 }
6177
6178 if (!brightness_enable) {
6179 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6180 "brightness support disabled by "
6181 "module parameter\n");
6182 return 1;
6183 }
6184
6185 if (b > 16) {
6186 printk(TPACPI_ERR
6187 "Unsupported brightness interface, "
6188 "please contact %s\n", TPACPI_MAIL);
6189 return 1;
6190 }
6191 if (b == 16)
6192 tp_features.bright_16levels = 1;
6193
6194 /*
6195 * Check for module parameter bogosity, note that we
6196 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6197 * able to detect "unspecified"
6198 */
6199 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6200 return -EINVAL;
6201
6202 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6203 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6204 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6205 if (quirks & TPACPI_BRGHT_Q_EC)
6206 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6207 else
6208 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6209
6210 dbg_printk(TPACPI_DBG_BRGHT,
6211 "driver auto-selected brightness_mode=%d\n",
6212 brightness_mode);
6213 }
6214
6215 /* Safety */
6216 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6217 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6218 brightness_mode == TPACPI_BRGHT_MODE_EC))
6219 return -EINVAL;
6220
6221 if (tpacpi_brightness_get_raw(&b) < 0)
6222 return 1;
6223
6224 if (tp_features.bright_16levels)
6225 printk(TPACPI_INFO
6226 "detected a 16-level brightness capable ThinkPad\n");
6227
6228 ibm_backlight_device = backlight_device_register(
6229 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6230 &ibm_backlight_data);
6231 if (IS_ERR(ibm_backlight_device)) {
6232 int rc = PTR_ERR(ibm_backlight_device);
6233 ibm_backlight_device = NULL;
6234 printk(TPACPI_ERR "Could not register backlight device\n");
6235 return rc;
6236 }
6237 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6238 "brightness is supported\n");
6239
6240 if (quirks & TPACPI_BRGHT_Q_ASK) {
6241 printk(TPACPI_NOTICE
6242 "brightness: will use unverified default: "
6243 "brightness_mode=%d\n", brightness_mode);
6244 printk(TPACPI_NOTICE
6245 "brightness: please report to %s whether it works well "
6246 "or not on your ThinkPad\n", TPACPI_MAIL);
6247 }
6248
6249 ibm_backlight_device->props.max_brightness =
6250 (tp_features.bright_16levels)? 15 : 7;
6251 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6252 backlight_update_status(ibm_backlight_device);
6253
6254 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6255 "brightness: registering brightness hotkeys "
6256 "as change notification\n");
6257 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6258 | TP_ACPI_HKEY_BRGHTUP_MASK
6259 | TP_ACPI_HKEY_BRGHTDWN_MASK);;
6260 return 0;
6261 }
6262
6263 static void brightness_suspend(pm_message_t state)
6264 {
6265 tpacpi_brightness_checkpoint_nvram();
6266 }
6267
6268 static void brightness_shutdown(void)
6269 {
6270 tpacpi_brightness_checkpoint_nvram();
6271 }
6272
6273 static void brightness_exit(void)
6274 {
6275 if (ibm_backlight_device) {
6276 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6277 "calling backlight_device_unregister()\n");
6278 backlight_device_unregister(ibm_backlight_device);
6279 }
6280
6281 tpacpi_brightness_checkpoint_nvram();
6282 }
6283
6284 static int brightness_read(char *p)
6285 {
6286 int len = 0;
6287 int level;
6288
6289 level = brightness_get(NULL);
6290 if (level < 0) {
6291 len += sprintf(p + len, "level:\t\tunreadable\n");
6292 } else {
6293 len += sprintf(p + len, "level:\t\t%d\n", level);
6294 len += sprintf(p + len, "commands:\tup, down\n");
6295 len += sprintf(p + len, "commands:\tlevel <level>"
6296 " (<level> is 0-%d)\n",
6297 (tp_features.bright_16levels) ? 15 : 7);
6298 }
6299
6300 return len;
6301 }
6302
6303 static int brightness_write(char *buf)
6304 {
6305 int level;
6306 int rc;
6307 char *cmd;
6308 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6309
6310 level = brightness_get(NULL);
6311 if (level < 0)
6312 return level;
6313
6314 while ((cmd = next_cmd(&buf))) {
6315 if (strlencmp(cmd, "up") == 0) {
6316 if (level < max_level)
6317 level++;
6318 } else if (strlencmp(cmd, "down") == 0) {
6319 if (level > 0)
6320 level--;
6321 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6322 level >= 0 && level <= max_level) {
6323 /* new level set */
6324 } else
6325 return -EINVAL;
6326 }
6327
6328 tpacpi_disclose_usertask("procfs brightness",
6329 "set level to %d\n", level);
6330
6331 /*
6332 * Now we know what the final level should be, so we try to set it.
6333 * Doing it this way makes the syscall restartable in case of EINTR
6334 */
6335 rc = brightness_set(level);
6336 if (!rc && ibm_backlight_device)
6337 backlight_force_update(ibm_backlight_device,
6338 BACKLIGHT_UPDATE_SYSFS);
6339 return (rc == -EINTR)? -ERESTARTSYS : rc;
6340 }
6341
6342 static struct ibm_struct brightness_driver_data = {
6343 .name = "brightness",
6344 .read = brightness_read,
6345 .write = brightness_write,
6346 .exit = brightness_exit,
6347 .suspend = brightness_suspend,
6348 .shutdown = brightness_shutdown,
6349 };
6350
6351 /*************************************************************************
6352 * Volume subdriver
6353 */
6354
6355 static int volume_offset = 0x30;
6356
6357 static int volume_read(char *p)
6358 {
6359 int len = 0;
6360 u8 level;
6361
6362 if (!acpi_ec_read(volume_offset, &level)) {
6363 len += sprintf(p + len, "level:\t\tunreadable\n");
6364 } else {
6365 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6366 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6367 len += sprintf(p + len, "commands:\tup, down, mute\n");
6368 len += sprintf(p + len, "commands:\tlevel <level>"
6369 " (<level> is 0-15)\n");
6370 }
6371
6372 return len;
6373 }
6374
6375 static int volume_write(char *buf)
6376 {
6377 int cmos_cmd, inc, i;
6378 u8 level, mute;
6379 int new_level, new_mute;
6380 char *cmd;
6381
6382 while ((cmd = next_cmd(&buf))) {
6383 if (!acpi_ec_read(volume_offset, &level))
6384 return -EIO;
6385 new_mute = mute = level & 0x40;
6386 new_level = level = level & 0xf;
6387
6388 if (strlencmp(cmd, "up") == 0) {
6389 if (mute)
6390 new_mute = 0;
6391 else
6392 new_level = level == 15 ? 15 : level + 1;
6393 } else if (strlencmp(cmd, "down") == 0) {
6394 if (mute)
6395 new_mute = 0;
6396 else
6397 new_level = level == 0 ? 0 : level - 1;
6398 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6399 new_level >= 0 && new_level <= 15) {
6400 /* new_level set */
6401 } else if (strlencmp(cmd, "mute") == 0) {
6402 new_mute = 0x40;
6403 } else
6404 return -EINVAL;
6405
6406 if (new_level != level) {
6407 /* mute doesn't change */
6408
6409 cmos_cmd = (new_level > level) ?
6410 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6411 inc = new_level > level ? 1 : -1;
6412
6413 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6414 !acpi_ec_write(volume_offset, level)))
6415 return -EIO;
6416
6417 for (i = level; i != new_level; i += inc)
6418 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6419 !acpi_ec_write(volume_offset, i + inc))
6420 return -EIO;
6421
6422 if (mute &&
6423 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6424 !acpi_ec_write(volume_offset, new_level + mute))) {
6425 return -EIO;
6426 }
6427 }
6428
6429 if (new_mute != mute) {
6430 /* level doesn't change */
6431
6432 cmos_cmd = (new_mute) ?
6433 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6434
6435 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6436 !acpi_ec_write(volume_offset, level + new_mute))
6437 return -EIO;
6438 }
6439 }
6440
6441 return 0;
6442 }
6443
6444 static struct ibm_struct volume_driver_data = {
6445 .name = "volume",
6446 .read = volume_read,
6447 .write = volume_write,
6448 };
6449
6450 /*************************************************************************
6451 * Fan subdriver
6452 */
6453
6454 /*
6455 * FAN ACCESS MODES
6456 *
6457 * TPACPI_FAN_RD_ACPI_GFAN:
6458 * ACPI GFAN method: returns fan level
6459 *
6460 * see TPACPI_FAN_WR_ACPI_SFAN
6461 * EC 0x2f (HFSP) not available if GFAN exists
6462 *
6463 * TPACPI_FAN_WR_ACPI_SFAN:
6464 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6465 *
6466 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6467 * it for writing.
6468 *
6469 * TPACPI_FAN_WR_TPEC:
6470 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6471 * Supported on almost all ThinkPads
6472 *
6473 * Fan speed changes of any sort (including those caused by the
6474 * disengaged mode) are usually done slowly by the firmware as the
6475 * maximum ammount of fan duty cycle change per second seems to be
6476 * limited.
6477 *
6478 * Reading is not available if GFAN exists.
6479 * Writing is not available if SFAN exists.
6480 *
6481 * Bits
6482 * 7 automatic mode engaged;
6483 * (default operation mode of the ThinkPad)
6484 * fan level is ignored in this mode.
6485 * 6 full speed mode (takes precedence over bit 7);
6486 * not available on all thinkpads. May disable
6487 * the tachometer while the fan controller ramps up
6488 * the speed (which can take up to a few *minutes*).
6489 * Speeds up fan to 100% duty-cycle, which is far above
6490 * the standard RPM levels. It is not impossible that
6491 * it could cause hardware damage.
6492 * 5-3 unused in some models. Extra bits for fan level
6493 * in others, but still useless as all values above
6494 * 7 map to the same speed as level 7 in these models.
6495 * 2-0 fan level (0..7 usually)
6496 * 0x00 = stop
6497 * 0x07 = max (set when temperatures critical)
6498 * Some ThinkPads may have other levels, see
6499 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6500 *
6501 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6502 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6503 * does so, its initial value is meaningless (0x07).
6504 *
6505 * For firmware bugs, refer to:
6506 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6507 *
6508 * ----
6509 *
6510 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6511 * Main fan tachometer reading (in RPM)
6512 *
6513 * This register is present on all ThinkPads with a new-style EC, and
6514 * it is known not to be present on the A21m/e, and T22, as there is
6515 * something else in offset 0x84 according to the ACPI DSDT. Other
6516 * ThinkPads from this same time period (and earlier) probably lack the
6517 * tachometer as well.
6518 *
6519 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6520 * was never fixed by IBM to report the EC firmware version string
6521 * probably support the tachometer (like the early X models), so
6522 * detecting it is quite hard. We need more data to know for sure.
6523 *
6524 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6525 * might result.
6526 *
6527 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6528 * mode.
6529 *
6530 * For firmware bugs, refer to:
6531 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6532 *
6533 * ----
6534 *
6535 * ThinkPad EC register 0x31 bit 0 (only on select models)
6536 *
6537 * When bit 0 of EC register 0x31 is zero, the tachometer registers
6538 * show the speed of the main fan. When bit 0 of EC register 0x31
6539 * is one, the tachometer registers show the speed of the auxiliary
6540 * fan.
6541 *
6542 * Fan control seems to affect both fans, regardless of the state
6543 * of this bit.
6544 *
6545 * So far, only the firmware for the X60/X61 non-tablet versions
6546 * seem to support this (firmware TP-7M).
6547 *
6548 * TPACPI_FAN_WR_ACPI_FANS:
6549 * ThinkPad X31, X40, X41. Not available in the X60.
6550 *
6551 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6552 * high speed. ACPI DSDT seems to map these three speeds to levels
6553 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6554 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6555 *
6556 * The speeds are stored on handles
6557 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6558 *
6559 * There are three default speed sets, acessible as handles:
6560 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6561 *
6562 * ACPI DSDT switches which set is in use depending on various
6563 * factors.
6564 *
6565 * TPACPI_FAN_WR_TPEC is also available and should be used to
6566 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6567 * but the ACPI tables just mention level 7.
6568 */
6569
6570 enum { /* Fan control constants */
6571 fan_status_offset = 0x2f, /* EC register 0x2f */
6572 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6573 * 0x84 must be read before 0x85 */
6574 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
6575 bit 0 selects which fan is active */
6576
6577 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6578 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6579
6580 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6581 };
6582
6583 enum fan_status_access_mode {
6584 TPACPI_FAN_NONE = 0, /* No fan status or control */
6585 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6586 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6587 };
6588
6589 enum fan_control_access_mode {
6590 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6591 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6592 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6593 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6594 };
6595
6596 enum fan_control_commands {
6597 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6598 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6599 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6600 * and also watchdog cmd */
6601 };
6602
6603 static int fan_control_allowed;
6604
6605 static enum fan_status_access_mode fan_status_access_mode;
6606 static enum fan_control_access_mode fan_control_access_mode;
6607 static enum fan_control_commands fan_control_commands;
6608
6609 static u8 fan_control_initial_status;
6610 static u8 fan_control_desired_level;
6611 static u8 fan_control_resume_level;
6612 static int fan_watchdog_maxinterval;
6613
6614 static struct mutex fan_mutex;
6615
6616 static void fan_watchdog_fire(struct work_struct *ignored);
6617 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6618
6619 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6620 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6621 "\\FSPD", /* 600e/x, 770e, 770x */
6622 ); /* all others */
6623 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6624 "JFNS", /* 770x-JL */
6625 ); /* all others */
6626
6627 /*
6628 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6629 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6630 * be in auto mode (0x80).
6631 *
6632 * This is corrected by any write to HFSP either by the driver, or
6633 * by the firmware.
6634 *
6635 * We assume 0x07 really means auto mode while this quirk is active,
6636 * as this is far more likely than the ThinkPad being in level 7,
6637 * which is only used by the firmware during thermal emergencies.
6638 *
6639 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6640 * TP-70 (T43, R52), which are known to be buggy.
6641 */
6642
6643 static void fan_quirk1_setup(void)
6644 {
6645 if (fan_control_initial_status == 0x07) {
6646 printk(TPACPI_NOTICE
6647 "fan_init: initial fan status is unknown, "
6648 "assuming it is in auto mode\n");
6649 tp_features.fan_ctrl_status_undef = 1;
6650 }
6651 }
6652
6653 static void fan_quirk1_handle(u8 *fan_status)
6654 {
6655 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6656 if (*fan_status != fan_control_initial_status) {
6657 /* something changed the HFSP regisnter since
6658 * driver init time, so it is not undefined
6659 * anymore */
6660 tp_features.fan_ctrl_status_undef = 0;
6661 } else {
6662 /* Return most likely status. In fact, it
6663 * might be the only possible status */
6664 *fan_status = TP_EC_FAN_AUTO;
6665 }
6666 }
6667 }
6668
6669 /* Select main fan on X60/X61, NOOP on others */
6670 static bool fan_select_fan1(void)
6671 {
6672 if (tp_features.second_fan) {
6673 u8 val;
6674
6675 if (ec_read(fan_select_offset, &val) < 0)
6676 return false;
6677 val &= 0xFEU;
6678 if (ec_write(fan_select_offset, val) < 0)
6679 return false;
6680 }
6681 return true;
6682 }
6683
6684 /* Select secondary fan on X60/X61 */
6685 static bool fan_select_fan2(void)
6686 {
6687 u8 val;
6688
6689 if (!tp_features.second_fan)
6690 return false;
6691
6692 if (ec_read(fan_select_offset, &val) < 0)
6693 return false;
6694 val |= 0x01U;
6695 if (ec_write(fan_select_offset, val) < 0)
6696 return false;
6697
6698 return true;
6699 }
6700
6701 /*
6702 * Call with fan_mutex held
6703 */
6704 static void fan_update_desired_level(u8 status)
6705 {
6706 if ((status &
6707 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6708 if (status > 7)
6709 fan_control_desired_level = 7;
6710 else
6711 fan_control_desired_level = status;
6712 }
6713 }
6714
6715 static int fan_get_status(u8 *status)
6716 {
6717 u8 s;
6718
6719 /* TODO:
6720 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6721
6722 switch (fan_status_access_mode) {
6723 case TPACPI_FAN_RD_ACPI_GFAN:
6724 /* 570, 600e/x, 770e, 770x */
6725
6726 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6727 return -EIO;
6728
6729 if (likely(status))
6730 *status = s & 0x07;
6731
6732 break;
6733
6734 case TPACPI_FAN_RD_TPEC:
6735 /* all except 570, 600e/x, 770e, 770x */
6736 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6737 return -EIO;
6738
6739 if (likely(status)) {
6740 *status = s;
6741 fan_quirk1_handle(status);
6742 }
6743
6744 break;
6745
6746 default:
6747 return -ENXIO;
6748 }
6749
6750 return 0;
6751 }
6752
6753 static int fan_get_status_safe(u8 *status)
6754 {
6755 int rc;
6756 u8 s;
6757
6758 if (mutex_lock_killable(&fan_mutex))
6759 return -ERESTARTSYS;
6760 rc = fan_get_status(&s);
6761 if (!rc)
6762 fan_update_desired_level(s);
6763 mutex_unlock(&fan_mutex);
6764
6765 if (status)
6766 *status = s;
6767
6768 return rc;
6769 }
6770
6771 static int fan_get_speed(unsigned int *speed)
6772 {
6773 u8 hi, lo;
6774
6775 switch (fan_status_access_mode) {
6776 case TPACPI_FAN_RD_TPEC:
6777 /* all except 570, 600e/x, 770e, 770x */
6778 if (unlikely(!fan_select_fan1()))
6779 return -EIO;
6780 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6781 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6782 return -EIO;
6783
6784 if (likely(speed))
6785 *speed = (hi << 8) | lo;
6786
6787 break;
6788
6789 default:
6790 return -ENXIO;
6791 }
6792
6793 return 0;
6794 }
6795
6796 static int fan2_get_speed(unsigned int *speed)
6797 {
6798 u8 hi, lo;
6799 bool rc;
6800
6801 switch (fan_status_access_mode) {
6802 case TPACPI_FAN_RD_TPEC:
6803 /* all except 570, 600e/x, 770e, 770x */
6804 if (unlikely(!fan_select_fan2()))
6805 return -EIO;
6806 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6807 !acpi_ec_read(fan_rpm_offset + 1, &hi);
6808 fan_select_fan1(); /* play it safe */
6809 if (rc)
6810 return -EIO;
6811
6812 if (likely(speed))
6813 *speed = (hi << 8) | lo;
6814
6815 break;
6816
6817 default:
6818 return -ENXIO;
6819 }
6820
6821 return 0;
6822 }
6823
6824 static int fan_set_level(int level)
6825 {
6826 if (!fan_control_allowed)
6827 return -EPERM;
6828
6829 switch (fan_control_access_mode) {
6830 case TPACPI_FAN_WR_ACPI_SFAN:
6831 if (level >= 0 && level <= 7) {
6832 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6833 return -EIO;
6834 } else
6835 return -EINVAL;
6836 break;
6837
6838 case TPACPI_FAN_WR_ACPI_FANS:
6839 case TPACPI_FAN_WR_TPEC:
6840 if (!(level & TP_EC_FAN_AUTO) &&
6841 !(level & TP_EC_FAN_FULLSPEED) &&
6842 ((level < 0) || (level > 7)))
6843 return -EINVAL;
6844
6845 /* safety net should the EC not support AUTO
6846 * or FULLSPEED mode bits and just ignore them */
6847 if (level & TP_EC_FAN_FULLSPEED)
6848 level |= 7; /* safety min speed 7 */
6849 else if (level & TP_EC_FAN_AUTO)
6850 level |= 4; /* safety min speed 4 */
6851
6852 if (!acpi_ec_write(fan_status_offset, level))
6853 return -EIO;
6854 else
6855 tp_features.fan_ctrl_status_undef = 0;
6856 break;
6857
6858 default:
6859 return -ENXIO;
6860 }
6861
6862 vdbg_printk(TPACPI_DBG_FAN,
6863 "fan control: set fan control register to 0x%02x\n", level);
6864 return 0;
6865 }
6866
6867 static int fan_set_level_safe(int level)
6868 {
6869 int rc;
6870
6871 if (!fan_control_allowed)
6872 return -EPERM;
6873
6874 if (mutex_lock_killable(&fan_mutex))
6875 return -ERESTARTSYS;
6876
6877 if (level == TPACPI_FAN_LAST_LEVEL)
6878 level = fan_control_desired_level;
6879
6880 rc = fan_set_level(level);
6881 if (!rc)
6882 fan_update_desired_level(level);
6883
6884 mutex_unlock(&fan_mutex);
6885 return rc;
6886 }
6887
6888 static int fan_set_enable(void)
6889 {
6890 u8 s;
6891 int rc;
6892
6893 if (!fan_control_allowed)
6894 return -EPERM;
6895
6896 if (mutex_lock_killable(&fan_mutex))
6897 return -ERESTARTSYS;
6898
6899 switch (fan_control_access_mode) {
6900 case TPACPI_FAN_WR_ACPI_FANS:
6901 case TPACPI_FAN_WR_TPEC:
6902 rc = fan_get_status(&s);
6903 if (rc < 0)
6904 break;
6905
6906 /* Don't go out of emergency fan mode */
6907 if (s != 7) {
6908 s &= 0x07;
6909 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6910 }
6911
6912 if (!acpi_ec_write(fan_status_offset, s))
6913 rc = -EIO;
6914 else {
6915 tp_features.fan_ctrl_status_undef = 0;
6916 rc = 0;
6917 }
6918 break;
6919
6920 case TPACPI_FAN_WR_ACPI_SFAN:
6921 rc = fan_get_status(&s);
6922 if (rc < 0)
6923 break;
6924
6925 s &= 0x07;
6926
6927 /* Set fan to at least level 4 */
6928 s |= 4;
6929
6930 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6931 rc = -EIO;
6932 else
6933 rc = 0;
6934 break;
6935
6936 default:
6937 rc = -ENXIO;
6938 }
6939
6940 mutex_unlock(&fan_mutex);
6941
6942 if (!rc)
6943 vdbg_printk(TPACPI_DBG_FAN,
6944 "fan control: set fan control register to 0x%02x\n",
6945 s);
6946 return rc;
6947 }
6948
6949 static int fan_set_disable(void)
6950 {
6951 int rc;
6952
6953 if (!fan_control_allowed)
6954 return -EPERM;
6955
6956 if (mutex_lock_killable(&fan_mutex))
6957 return -ERESTARTSYS;
6958
6959 rc = 0;
6960 switch (fan_control_access_mode) {
6961 case TPACPI_FAN_WR_ACPI_FANS:
6962 case TPACPI_FAN_WR_TPEC:
6963 if (!acpi_ec_write(fan_status_offset, 0x00))
6964 rc = -EIO;
6965 else {
6966 fan_control_desired_level = 0;
6967 tp_features.fan_ctrl_status_undef = 0;
6968 }
6969 break;
6970
6971 case TPACPI_FAN_WR_ACPI_SFAN:
6972 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6973 rc = -EIO;
6974 else
6975 fan_control_desired_level = 0;
6976 break;
6977
6978 default:
6979 rc = -ENXIO;
6980 }
6981
6982 if (!rc)
6983 vdbg_printk(TPACPI_DBG_FAN,
6984 "fan control: set fan control register to 0\n");
6985
6986 mutex_unlock(&fan_mutex);
6987 return rc;
6988 }
6989
6990 static int fan_set_speed(int speed)
6991 {
6992 int rc;
6993
6994 if (!fan_control_allowed)
6995 return -EPERM;
6996
6997 if (mutex_lock_killable(&fan_mutex))
6998 return -ERESTARTSYS;
6999
7000 rc = 0;
7001 switch (fan_control_access_mode) {
7002 case TPACPI_FAN_WR_ACPI_FANS:
7003 if (speed >= 0 && speed <= 65535) {
7004 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7005 speed, speed, speed))
7006 rc = -EIO;
7007 } else
7008 rc = -EINVAL;
7009 break;
7010
7011 default:
7012 rc = -ENXIO;
7013 }
7014
7015 mutex_unlock(&fan_mutex);
7016 return rc;
7017 }
7018
7019 static void fan_watchdog_reset(void)
7020 {
7021 static int fan_watchdog_active;
7022
7023 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7024 return;
7025
7026 if (fan_watchdog_active)
7027 cancel_delayed_work(&fan_watchdog_task);
7028
7029 if (fan_watchdog_maxinterval > 0 &&
7030 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7031 fan_watchdog_active = 1;
7032 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7033 msecs_to_jiffies(fan_watchdog_maxinterval
7034 * 1000))) {
7035 printk(TPACPI_ERR
7036 "failed to queue the fan watchdog, "
7037 "watchdog will not trigger\n");
7038 }
7039 } else
7040 fan_watchdog_active = 0;
7041 }
7042
7043 static void fan_watchdog_fire(struct work_struct *ignored)
7044 {
7045 int rc;
7046
7047 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7048 return;
7049
7050 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7051 rc = fan_set_enable();
7052 if (rc < 0) {
7053 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7054 "will try again later...\n", -rc);
7055 /* reschedule for later */
7056 fan_watchdog_reset();
7057 }
7058 }
7059
7060 /*
7061 * SYSFS fan layout: hwmon compatible (device)
7062 *
7063 * pwm*_enable:
7064 * 0: "disengaged" mode
7065 * 1: manual mode
7066 * 2: native EC "auto" mode (recommended, hardware default)
7067 *
7068 * pwm*: set speed in manual mode, ignored otherwise.
7069 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7070 * interpolation.
7071 *
7072 * fan*_input: tachometer reading, RPM
7073 *
7074 *
7075 * SYSFS fan layout: extensions
7076 *
7077 * fan_watchdog (driver):
7078 * fan watchdog interval in seconds, 0 disables (default), max 120
7079 */
7080
7081 /* sysfs fan pwm1_enable ----------------------------------------------- */
7082 static ssize_t fan_pwm1_enable_show(struct device *dev,
7083 struct device_attribute *attr,
7084 char *buf)
7085 {
7086 int res, mode;
7087 u8 status;
7088
7089 res = fan_get_status_safe(&status);
7090 if (res)
7091 return res;
7092
7093 if (status & TP_EC_FAN_FULLSPEED) {
7094 mode = 0;
7095 } else if (status & TP_EC_FAN_AUTO) {
7096 mode = 2;
7097 } else
7098 mode = 1;
7099
7100 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7101 }
7102
7103 static ssize_t fan_pwm1_enable_store(struct device *dev,
7104 struct device_attribute *attr,
7105 const char *buf, size_t count)
7106 {
7107 unsigned long t;
7108 int res, level;
7109
7110 if (parse_strtoul(buf, 2, &t))
7111 return -EINVAL;
7112
7113 tpacpi_disclose_usertask("hwmon pwm1_enable",
7114 "set fan mode to %lu\n", t);
7115
7116 switch (t) {
7117 case 0:
7118 level = TP_EC_FAN_FULLSPEED;
7119 break;
7120 case 1:
7121 level = TPACPI_FAN_LAST_LEVEL;
7122 break;
7123 case 2:
7124 level = TP_EC_FAN_AUTO;
7125 break;
7126 case 3:
7127 /* reserved for software-controlled auto mode */
7128 return -ENOSYS;
7129 default:
7130 return -EINVAL;
7131 }
7132
7133 res = fan_set_level_safe(level);
7134 if (res == -ENXIO)
7135 return -EINVAL;
7136 else if (res < 0)
7137 return res;
7138
7139 fan_watchdog_reset();
7140
7141 return count;
7142 }
7143
7144 static struct device_attribute dev_attr_fan_pwm1_enable =
7145 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7146 fan_pwm1_enable_show, fan_pwm1_enable_store);
7147
7148 /* sysfs fan pwm1 ------------------------------------------------------ */
7149 static ssize_t fan_pwm1_show(struct device *dev,
7150 struct device_attribute *attr,
7151 char *buf)
7152 {
7153 int res;
7154 u8 status;
7155
7156 res = fan_get_status_safe(&status);
7157 if (res)
7158 return res;
7159
7160 if ((status &
7161 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7162 status = fan_control_desired_level;
7163
7164 if (status > 7)
7165 status = 7;
7166
7167 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7168 }
7169
7170 static ssize_t fan_pwm1_store(struct device *dev,
7171 struct device_attribute *attr,
7172 const char *buf, size_t count)
7173 {
7174 unsigned long s;
7175 int rc;
7176 u8 status, newlevel;
7177
7178 if (parse_strtoul(buf, 255, &s))
7179 return -EINVAL;
7180
7181 tpacpi_disclose_usertask("hwmon pwm1",
7182 "set fan speed to %lu\n", s);
7183
7184 /* scale down from 0-255 to 0-7 */
7185 newlevel = (s >> 5) & 0x07;
7186
7187 if (mutex_lock_killable(&fan_mutex))
7188 return -ERESTARTSYS;
7189
7190 rc = fan_get_status(&status);
7191 if (!rc && (status &
7192 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7193 rc = fan_set_level(newlevel);
7194 if (rc == -ENXIO)
7195 rc = -EINVAL;
7196 else if (!rc) {
7197 fan_update_desired_level(newlevel);
7198 fan_watchdog_reset();
7199 }
7200 }
7201
7202 mutex_unlock(&fan_mutex);
7203 return (rc)? rc : count;
7204 }
7205
7206 static struct device_attribute dev_attr_fan_pwm1 =
7207 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7208 fan_pwm1_show, fan_pwm1_store);
7209
7210 /* sysfs fan fan1_input ------------------------------------------------ */
7211 static ssize_t fan_fan1_input_show(struct device *dev,
7212 struct device_attribute *attr,
7213 char *buf)
7214 {
7215 int res;
7216 unsigned int speed;
7217
7218 res = fan_get_speed(&speed);
7219 if (res < 0)
7220 return res;
7221
7222 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7223 }
7224
7225 static struct device_attribute dev_attr_fan_fan1_input =
7226 __ATTR(fan1_input, S_IRUGO,
7227 fan_fan1_input_show, NULL);
7228
7229 /* sysfs fan fan2_input ------------------------------------------------ */
7230 static ssize_t fan_fan2_input_show(struct device *dev,
7231 struct device_attribute *attr,
7232 char *buf)
7233 {
7234 int res;
7235 unsigned int speed;
7236
7237 res = fan2_get_speed(&speed);
7238 if (res < 0)
7239 return res;
7240
7241 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7242 }
7243
7244 static struct device_attribute dev_attr_fan_fan2_input =
7245 __ATTR(fan2_input, S_IRUGO,
7246 fan_fan2_input_show, NULL);
7247
7248 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7249 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7250 char *buf)
7251 {
7252 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7253 }
7254
7255 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7256 const char *buf, size_t count)
7257 {
7258 unsigned long t;
7259
7260 if (parse_strtoul(buf, 120, &t))
7261 return -EINVAL;
7262
7263 if (!fan_control_allowed)
7264 return -EPERM;
7265
7266 fan_watchdog_maxinterval = t;
7267 fan_watchdog_reset();
7268
7269 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7270
7271 return count;
7272 }
7273
7274 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7275 fan_fan_watchdog_show, fan_fan_watchdog_store);
7276
7277 /* --------------------------------------------------------------------- */
7278 static struct attribute *fan_attributes[] = {
7279 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7280 &dev_attr_fan_fan1_input.attr,
7281 NULL, /* for fan2_input */
7282 NULL
7283 };
7284
7285 static const struct attribute_group fan_attr_group = {
7286 .attrs = fan_attributes,
7287 };
7288
7289 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7290 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7291
7292 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7293 { .vendor = PCI_VENDOR_ID_IBM, \
7294 .bios = TPACPI_MATCH_ANY, \
7295 .ec = TPID(__id1, __id2), \
7296 .quirks = __quirks }
7297
7298 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7299 { .vendor = PCI_VENDOR_ID_LENOVO, \
7300 .bios = TPACPI_MATCH_ANY, \
7301 .ec = TPID(__id1, __id2), \
7302 .quirks = __quirks }
7303
7304 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7305 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7306 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7307 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7308 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7309 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7310 };
7311
7312 #undef TPACPI_FAN_QL
7313 #undef TPACPI_FAN_QI
7314
7315 static int __init fan_init(struct ibm_init_struct *iibm)
7316 {
7317 int rc;
7318 unsigned long quirks;
7319
7320 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7321 "initializing fan subdriver\n");
7322
7323 mutex_init(&fan_mutex);
7324 fan_status_access_mode = TPACPI_FAN_NONE;
7325 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7326 fan_control_commands = 0;
7327 fan_watchdog_maxinterval = 0;
7328 tp_features.fan_ctrl_status_undef = 0;
7329 tp_features.second_fan = 0;
7330 fan_control_desired_level = 7;
7331
7332 TPACPI_ACPIHANDLE_INIT(fans);
7333 TPACPI_ACPIHANDLE_INIT(gfan);
7334 TPACPI_ACPIHANDLE_INIT(sfan);
7335
7336 quirks = tpacpi_check_quirks(fan_quirk_table,
7337 ARRAY_SIZE(fan_quirk_table));
7338
7339 if (gfan_handle) {
7340 /* 570, 600e/x, 770e, 770x */
7341 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7342 } else {
7343 /* all other ThinkPads: note that even old-style
7344 * ThinkPad ECs supports the fan control register */
7345 if (likely(acpi_ec_read(fan_status_offset,
7346 &fan_control_initial_status))) {
7347 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7348 if (quirks & TPACPI_FAN_Q1)
7349 fan_quirk1_setup();
7350 if (quirks & TPACPI_FAN_2FAN) {
7351 tp_features.second_fan = 1;
7352 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7353 "secondary fan support enabled\n");
7354 }
7355 } else {
7356 printk(TPACPI_ERR
7357 "ThinkPad ACPI EC access misbehaving, "
7358 "fan status and control unavailable\n");
7359 return 1;
7360 }
7361 }
7362
7363 if (sfan_handle) {
7364 /* 570, 770x-JL */
7365 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7366 fan_control_commands |=
7367 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7368 } else {
7369 if (!gfan_handle) {
7370 /* gfan without sfan means no fan control */
7371 /* all other models implement TP EC 0x2f control */
7372
7373 if (fans_handle) {
7374 /* X31, X40, X41 */
7375 fan_control_access_mode =
7376 TPACPI_FAN_WR_ACPI_FANS;
7377 fan_control_commands |=
7378 TPACPI_FAN_CMD_SPEED |
7379 TPACPI_FAN_CMD_LEVEL |
7380 TPACPI_FAN_CMD_ENABLE;
7381 } else {
7382 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7383 fan_control_commands |=
7384 TPACPI_FAN_CMD_LEVEL |
7385 TPACPI_FAN_CMD_ENABLE;
7386 }
7387 }
7388 }
7389
7390 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7391 "fan is %s, modes %d, %d\n",
7392 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7393 fan_control_access_mode != TPACPI_FAN_WR_NONE),
7394 fan_status_access_mode, fan_control_access_mode);
7395
7396 /* fan control master switch */
7397 if (!fan_control_allowed) {
7398 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7399 fan_control_commands = 0;
7400 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7401 "fan control features disabled by parameter\n");
7402 }
7403
7404 /* update fan_control_desired_level */
7405 if (fan_status_access_mode != TPACPI_FAN_NONE)
7406 fan_get_status_safe(NULL);
7407
7408 if (fan_status_access_mode != TPACPI_FAN_NONE ||
7409 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7410 if (tp_features.second_fan) {
7411 /* attach second fan tachometer */
7412 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7413 &dev_attr_fan_fan2_input.attr;
7414 }
7415 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7416 &fan_attr_group);
7417 if (rc < 0)
7418 return rc;
7419
7420 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7421 &driver_attr_fan_watchdog);
7422 if (rc < 0) {
7423 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7424 &fan_attr_group);
7425 return rc;
7426 }
7427 return 0;
7428 } else
7429 return 1;
7430 }
7431
7432 static void fan_exit(void)
7433 {
7434 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7435 "cancelling any pending fan watchdog tasks\n");
7436
7437 /* FIXME: can we really do this unconditionally? */
7438 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7439 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7440 &driver_attr_fan_watchdog);
7441
7442 cancel_delayed_work(&fan_watchdog_task);
7443 flush_workqueue(tpacpi_wq);
7444 }
7445
7446 static void fan_suspend(pm_message_t state)
7447 {
7448 int rc;
7449
7450 if (!fan_control_allowed)
7451 return;
7452
7453 /* Store fan status in cache */
7454 fan_control_resume_level = 0;
7455 rc = fan_get_status_safe(&fan_control_resume_level);
7456 if (rc < 0)
7457 printk(TPACPI_NOTICE
7458 "failed to read fan level for later "
7459 "restore during resume: %d\n", rc);
7460
7461 /* if it is undefined, don't attempt to restore it.
7462 * KEEP THIS LAST */
7463 if (tp_features.fan_ctrl_status_undef)
7464 fan_control_resume_level = 0;
7465 }
7466
7467 static void fan_resume(void)
7468 {
7469 u8 current_level = 7;
7470 bool do_set = false;
7471 int rc;
7472
7473 /* DSDT *always* updates status on resume */
7474 tp_features.fan_ctrl_status_undef = 0;
7475
7476 if (!fan_control_allowed ||
7477 !fan_control_resume_level ||
7478 (fan_get_status_safe(&current_level) < 0))
7479 return;
7480
7481 switch (fan_control_access_mode) {
7482 case TPACPI_FAN_WR_ACPI_SFAN:
7483 /* never decrease fan level */
7484 do_set = (fan_control_resume_level > current_level);
7485 break;
7486 case TPACPI_FAN_WR_ACPI_FANS:
7487 case TPACPI_FAN_WR_TPEC:
7488 /* never decrease fan level, scale is:
7489 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7490 *
7491 * We expect the firmware to set either 7 or AUTO, but we
7492 * handle FULLSPEED out of paranoia.
7493 *
7494 * So, we can safely only restore FULLSPEED or 7, anything
7495 * else could slow the fan. Restoring AUTO is useless, at
7496 * best that's exactly what the DSDT already set (it is the
7497 * slower it uses).
7498 *
7499 * Always keep in mind that the DSDT *will* have set the
7500 * fans to what the vendor supposes is the best level. We
7501 * muck with it only to speed the fan up.
7502 */
7503 if (fan_control_resume_level != 7 &&
7504 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7505 return;
7506 else
7507 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7508 (current_level != fan_control_resume_level);
7509 break;
7510 default:
7511 return;
7512 }
7513 if (do_set) {
7514 printk(TPACPI_NOTICE
7515 "restoring fan level to 0x%02x\n",
7516 fan_control_resume_level);
7517 rc = fan_set_level_safe(fan_control_resume_level);
7518 if (rc < 0)
7519 printk(TPACPI_NOTICE
7520 "failed to restore fan level: %d\n", rc);
7521 }
7522 }
7523
7524 static int fan_read(char *p)
7525 {
7526 int len = 0;
7527 int rc;
7528 u8 status;
7529 unsigned int speed = 0;
7530
7531 switch (fan_status_access_mode) {
7532 case TPACPI_FAN_RD_ACPI_GFAN:
7533 /* 570, 600e/x, 770e, 770x */
7534 rc = fan_get_status_safe(&status);
7535 if (rc < 0)
7536 return rc;
7537
7538 len += sprintf(p + len, "status:\t\t%s\n"
7539 "level:\t\t%d\n",
7540 (status != 0) ? "enabled" : "disabled", status);
7541 break;
7542
7543 case TPACPI_FAN_RD_TPEC:
7544 /* all except 570, 600e/x, 770e, 770x */
7545 rc = fan_get_status_safe(&status);
7546 if (rc < 0)
7547 return rc;
7548
7549 len += sprintf(p + len, "status:\t\t%s\n",
7550 (status != 0) ? "enabled" : "disabled");
7551
7552 rc = fan_get_speed(&speed);
7553 if (rc < 0)
7554 return rc;
7555
7556 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7557
7558 if (status & TP_EC_FAN_FULLSPEED)
7559 /* Disengaged mode takes precedence */
7560 len += sprintf(p + len, "level:\t\tdisengaged\n");
7561 else if (status & TP_EC_FAN_AUTO)
7562 len += sprintf(p + len, "level:\t\tauto\n");
7563 else
7564 len += sprintf(p + len, "level:\t\t%d\n", status);
7565 break;
7566
7567 case TPACPI_FAN_NONE:
7568 default:
7569 len += sprintf(p + len, "status:\t\tnot supported\n");
7570 }
7571
7572 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7573 len += sprintf(p + len, "commands:\tlevel <level>");
7574
7575 switch (fan_control_access_mode) {
7576 case TPACPI_FAN_WR_ACPI_SFAN:
7577 len += sprintf(p + len, " (<level> is 0-7)\n");
7578 break;
7579
7580 default:
7581 len += sprintf(p + len, " (<level> is 0-7, "
7582 "auto, disengaged, full-speed)\n");
7583 break;
7584 }
7585 }
7586
7587 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7588 len += sprintf(p + len, "commands:\tenable, disable\n"
7589 "commands:\twatchdog <timeout> (<timeout> "
7590 "is 0 (off), 1-120 (seconds))\n");
7591
7592 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7593 len += sprintf(p + len, "commands:\tspeed <speed>"
7594 " (<speed> is 0-65535)\n");
7595
7596 return len;
7597 }
7598
7599 static int fan_write_cmd_level(const char *cmd, int *rc)
7600 {
7601 int level;
7602
7603 if (strlencmp(cmd, "level auto") == 0)
7604 level = TP_EC_FAN_AUTO;
7605 else if ((strlencmp(cmd, "level disengaged") == 0) |
7606 (strlencmp(cmd, "level full-speed") == 0))
7607 level = TP_EC_FAN_FULLSPEED;
7608 else if (sscanf(cmd, "level %d", &level) != 1)
7609 return 0;
7610
7611 *rc = fan_set_level_safe(level);
7612 if (*rc == -ENXIO)
7613 printk(TPACPI_ERR "level command accepted for unsupported "
7614 "access mode %d", fan_control_access_mode);
7615 else if (!*rc)
7616 tpacpi_disclose_usertask("procfs fan",
7617 "set level to %d\n", level);
7618
7619 return 1;
7620 }
7621
7622 static int fan_write_cmd_enable(const char *cmd, int *rc)
7623 {
7624 if (strlencmp(cmd, "enable") != 0)
7625 return 0;
7626
7627 *rc = fan_set_enable();
7628 if (*rc == -ENXIO)
7629 printk(TPACPI_ERR "enable command accepted for unsupported "
7630 "access mode %d", fan_control_access_mode);
7631 else if (!*rc)
7632 tpacpi_disclose_usertask("procfs fan", "enable\n");
7633
7634 return 1;
7635 }
7636
7637 static int fan_write_cmd_disable(const char *cmd, int *rc)
7638 {
7639 if (strlencmp(cmd, "disable") != 0)
7640 return 0;
7641
7642 *rc = fan_set_disable();
7643 if (*rc == -ENXIO)
7644 printk(TPACPI_ERR "disable command accepted for unsupported "
7645 "access mode %d", fan_control_access_mode);
7646 else if (!*rc)
7647 tpacpi_disclose_usertask("procfs fan", "disable\n");
7648
7649 return 1;
7650 }
7651
7652 static int fan_write_cmd_speed(const char *cmd, int *rc)
7653 {
7654 int speed;
7655
7656 /* TODO:
7657 * Support speed <low> <medium> <high> ? */
7658
7659 if (sscanf(cmd, "speed %d", &speed) != 1)
7660 return 0;
7661
7662 *rc = fan_set_speed(speed);
7663 if (*rc == -ENXIO)
7664 printk(TPACPI_ERR "speed command accepted for unsupported "
7665 "access mode %d", fan_control_access_mode);
7666 else if (!*rc)
7667 tpacpi_disclose_usertask("procfs fan",
7668 "set speed to %d\n", speed);
7669
7670 return 1;
7671 }
7672
7673 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7674 {
7675 int interval;
7676
7677 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7678 return 0;
7679
7680 if (interval < 0 || interval > 120)
7681 *rc = -EINVAL;
7682 else {
7683 fan_watchdog_maxinterval = interval;
7684 tpacpi_disclose_usertask("procfs fan",
7685 "set watchdog timer to %d\n",
7686 interval);
7687 }
7688
7689 return 1;
7690 }
7691
7692 static int fan_write(char *buf)
7693 {
7694 char *cmd;
7695 int rc = 0;
7696
7697 while (!rc && (cmd = next_cmd(&buf))) {
7698 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7699 fan_write_cmd_level(cmd, &rc)) &&
7700 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7701 (fan_write_cmd_enable(cmd, &rc) ||
7702 fan_write_cmd_disable(cmd, &rc) ||
7703 fan_write_cmd_watchdog(cmd, &rc))) &&
7704 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7705 fan_write_cmd_speed(cmd, &rc))
7706 )
7707 rc = -EINVAL;
7708 else if (!rc)
7709 fan_watchdog_reset();
7710 }
7711
7712 return rc;
7713 }
7714
7715 static struct ibm_struct fan_driver_data = {
7716 .name = "fan",
7717 .read = fan_read,
7718 .write = fan_write,
7719 .exit = fan_exit,
7720 .suspend = fan_suspend,
7721 .resume = fan_resume,
7722 };
7723
7724 /****************************************************************************
7725 ****************************************************************************
7726 *
7727 * Infrastructure
7728 *
7729 ****************************************************************************
7730 ****************************************************************************/
7731
7732 /*
7733 * HKEY event callout for other subdrivers go here
7734 * (yes, it is ugly, but it is quick, safe, and gets the job done
7735 */
7736 static void tpacpi_driver_event(const unsigned int hkey_event)
7737 {
7738 if (ibm_backlight_device) {
7739 switch (hkey_event) {
7740 case TP_HKEY_EV_BRGHT_UP:
7741 case TP_HKEY_EV_BRGHT_DOWN:
7742 tpacpi_brightness_notify_change();
7743 }
7744 }
7745 }
7746
7747
7748
7749 static void hotkey_driver_event(const unsigned int scancode)
7750 {
7751 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
7752 }
7753
7754 /* sysfs name ---------------------------------------------------------- */
7755 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7756 struct device_attribute *attr,
7757 char *buf)
7758 {
7759 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7760 }
7761
7762 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7763 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7764
7765 /* --------------------------------------------------------------------- */
7766
7767 /* /proc support */
7768 static struct proc_dir_entry *proc_dir;
7769
7770 /*
7771 * Module and infrastructure proble, init and exit handling
7772 */
7773
7774 static int force_load;
7775
7776 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7777 static const char * __init str_supported(int is_supported)
7778 {
7779 static char text_unsupported[] __initdata = "not supported";
7780
7781 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7782 }
7783 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7784
7785 static void ibm_exit(struct ibm_struct *ibm)
7786 {
7787 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7788
7789 list_del_init(&ibm->all_drivers);
7790
7791 if (ibm->flags.acpi_notify_installed) {
7792 dbg_printk(TPACPI_DBG_EXIT,
7793 "%s: acpi_remove_notify_handler\n", ibm->name);
7794 BUG_ON(!ibm->acpi);
7795 acpi_remove_notify_handler(*ibm->acpi->handle,
7796 ibm->acpi->type,
7797 dispatch_acpi_notify);
7798 ibm->flags.acpi_notify_installed = 0;
7799 ibm->flags.acpi_notify_installed = 0;
7800 }
7801
7802 if (ibm->flags.proc_created) {
7803 dbg_printk(TPACPI_DBG_EXIT,
7804 "%s: remove_proc_entry\n", ibm->name);
7805 remove_proc_entry(ibm->name, proc_dir);
7806 ibm->flags.proc_created = 0;
7807 }
7808
7809 if (ibm->flags.acpi_driver_registered) {
7810 dbg_printk(TPACPI_DBG_EXIT,
7811 "%s: acpi_bus_unregister_driver\n", ibm->name);
7812 BUG_ON(!ibm->acpi);
7813 acpi_bus_unregister_driver(ibm->acpi->driver);
7814 kfree(ibm->acpi->driver);
7815 ibm->acpi->driver = NULL;
7816 ibm->flags.acpi_driver_registered = 0;
7817 }
7818
7819 if (ibm->flags.init_called && ibm->exit) {
7820 ibm->exit();
7821 ibm->flags.init_called = 0;
7822 }
7823
7824 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7825 }
7826
7827 static int __init ibm_init(struct ibm_init_struct *iibm)
7828 {
7829 int ret;
7830 struct ibm_struct *ibm = iibm->data;
7831 struct proc_dir_entry *entry;
7832
7833 BUG_ON(ibm == NULL);
7834
7835 INIT_LIST_HEAD(&ibm->all_drivers);
7836
7837 if (ibm->flags.experimental && !experimental)
7838 return 0;
7839
7840 dbg_printk(TPACPI_DBG_INIT,
7841 "probing for %s\n", ibm->name);
7842
7843 if (iibm->init) {
7844 ret = iibm->init(iibm);
7845 if (ret > 0)
7846 return 0; /* probe failed */
7847 if (ret)
7848 return ret;
7849
7850 ibm->flags.init_called = 1;
7851 }
7852
7853 if (ibm->acpi) {
7854 if (ibm->acpi->hid) {
7855 ret = register_tpacpi_subdriver(ibm);
7856 if (ret)
7857 goto err_out;
7858 }
7859
7860 if (ibm->acpi->notify) {
7861 ret = setup_acpi_notify(ibm);
7862 if (ret == -ENODEV) {
7863 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7864 ibm->name);
7865 ret = 0;
7866 goto err_out;
7867 }
7868 if (ret < 0)
7869 goto err_out;
7870 }
7871 }
7872
7873 dbg_printk(TPACPI_DBG_INIT,
7874 "%s installed\n", ibm->name);
7875
7876 if (ibm->read) {
7877 entry = create_proc_entry(ibm->name,
7878 S_IFREG | S_IRUGO | S_IWUSR,
7879 proc_dir);
7880 if (!entry) {
7881 printk(TPACPI_ERR "unable to create proc entry %s\n",
7882 ibm->name);
7883 ret = -ENODEV;
7884 goto err_out;
7885 }
7886 entry->owner = THIS_MODULE;
7887 entry->data = ibm;
7888 entry->read_proc = &dispatch_procfs_read;
7889 if (ibm->write)
7890 entry->write_proc = &dispatch_procfs_write;
7891 ibm->flags.proc_created = 1;
7892 }
7893
7894 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7895
7896 return 0;
7897
7898 err_out:
7899 dbg_printk(TPACPI_DBG_INIT,
7900 "%s: at error exit path with result %d\n",
7901 ibm->name, ret);
7902
7903 ibm_exit(ibm);
7904 return (ret < 0)? ret : 0;
7905 }
7906
7907 /* Probing */
7908
7909 static bool __pure __init tpacpi_is_fw_digit(const char c)
7910 {
7911 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7912 }
7913
7914 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7915 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7916 const char t)
7917 {
7918 return s && strlen(s) >= 8 &&
7919 tpacpi_is_fw_digit(s[0]) &&
7920 tpacpi_is_fw_digit(s[1]) &&
7921 s[2] == t && s[3] == 'T' &&
7922 tpacpi_is_fw_digit(s[4]) &&
7923 tpacpi_is_fw_digit(s[5]) &&
7924 s[6] == 'W' && s[7] == 'W';
7925 }
7926
7927 /* returns 0 - probe ok, or < 0 - probe error.
7928 * Probe ok doesn't mean thinkpad found.
7929 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7930 static int __must_check __init get_thinkpad_model_data(
7931 struct thinkpad_id_data *tp)
7932 {
7933 const struct dmi_device *dev = NULL;
7934 char ec_fw_string[18];
7935 char const *s;
7936
7937 if (!tp)
7938 return -EINVAL;
7939
7940 memset(tp, 0, sizeof(*tp));
7941
7942 if (dmi_name_in_vendors("IBM"))
7943 tp->vendor = PCI_VENDOR_ID_IBM;
7944 else if (dmi_name_in_vendors("LENOVO"))
7945 tp->vendor = PCI_VENDOR_ID_LENOVO;
7946 else
7947 return 0;
7948
7949 s = dmi_get_system_info(DMI_BIOS_VERSION);
7950 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7951 if (s && !tp->bios_version_str)
7952 return -ENOMEM;
7953
7954 /* Really ancient ThinkPad 240X will fail this, which is fine */
7955 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7956 return 0;
7957
7958 tp->bios_model = tp->bios_version_str[0]
7959 | (tp->bios_version_str[1] << 8);
7960 tp->bios_release = (tp->bios_version_str[4] << 8)
7961 | tp->bios_version_str[5];
7962
7963 /*
7964 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7965 * X32 or newer, all Z series; Some models must have an
7966 * up-to-date BIOS or they will not be detected.
7967 *
7968 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7969 */
7970 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7971 if (sscanf(dev->name,
7972 "IBM ThinkPad Embedded Controller -[%17c",
7973 ec_fw_string) == 1) {
7974 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7975 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7976
7977 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7978 if (!tp->ec_version_str)
7979 return -ENOMEM;
7980
7981 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7982 tp->ec_model = ec_fw_string[0]
7983 | (ec_fw_string[1] << 8);
7984 tp->ec_release = (ec_fw_string[4] << 8)
7985 | ec_fw_string[5];
7986 } else {
7987 printk(TPACPI_NOTICE
7988 "ThinkPad firmware release %s "
7989 "doesn't match the known patterns\n",
7990 ec_fw_string);
7991 printk(TPACPI_NOTICE
7992 "please report this to %s\n",
7993 TPACPI_MAIL);
7994 }
7995 break;
7996 }
7997 }
7998
7999 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8000 if (s && !strnicmp(s, "ThinkPad", 8)) {
8001 tp->model_str = kstrdup(s, GFP_KERNEL);
8002 if (!tp->model_str)
8003 return -ENOMEM;
8004 }
8005
8006 s = dmi_get_system_info(DMI_PRODUCT_NAME);
8007 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8008 if (s && !tp->nummodel_str)
8009 return -ENOMEM;
8010
8011 return 0;
8012 }
8013
8014 static int __init probe_for_thinkpad(void)
8015 {
8016 int is_thinkpad;
8017
8018 if (acpi_disabled)
8019 return -ENODEV;
8020
8021 /*
8022 * Non-ancient models have better DMI tagging, but very old models
8023 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
8024 */
8025 is_thinkpad = (thinkpad_id.model_str != NULL) ||
8026 (thinkpad_id.ec_model != 0) ||
8027 tpacpi_is_fw_known();
8028
8029 /* ec is required because many other handles are relative to it */
8030 TPACPI_ACPIHANDLE_INIT(ec);
8031 if (!ec_handle) {
8032 if (is_thinkpad)
8033 printk(TPACPI_ERR
8034 "Not yet supported ThinkPad detected!\n");
8035 return -ENODEV;
8036 }
8037
8038 if (!is_thinkpad && !force_load)
8039 return -ENODEV;
8040
8041 return 0;
8042 }
8043
8044
8045 /* Module init, exit, parameters */
8046
8047 static struct ibm_init_struct ibms_init[] __initdata = {
8048 {
8049 .init = thinkpad_acpi_driver_init,
8050 .data = &thinkpad_acpi_driver_data,
8051 },
8052 {
8053 .init = hotkey_init,
8054 .data = &hotkey_driver_data,
8055 },
8056 {
8057 .init = bluetooth_init,
8058 .data = &bluetooth_driver_data,
8059 },
8060 {
8061 .init = wan_init,
8062 .data = &wan_driver_data,
8063 },
8064 {
8065 .init = uwb_init,
8066 .data = &uwb_driver_data,
8067 },
8068 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8069 {
8070 .init = video_init,
8071 .data = &video_driver_data,
8072 },
8073 #endif
8074 {
8075 .init = light_init,
8076 .data = &light_driver_data,
8077 },
8078 {
8079 .init = cmos_init,
8080 .data = &cmos_driver_data,
8081 },
8082 {
8083 .init = led_init,
8084 .data = &led_driver_data,
8085 },
8086 {
8087 .init = beep_init,
8088 .data = &beep_driver_data,
8089 },
8090 {
8091 .init = thermal_init,
8092 .data = &thermal_driver_data,
8093 },
8094 {
8095 .data = &ecdump_driver_data,
8096 },
8097 {
8098 .init = brightness_init,
8099 .data = &brightness_driver_data,
8100 },
8101 {
8102 .data = &volume_driver_data,
8103 },
8104 {
8105 .init = fan_init,
8106 .data = &fan_driver_data,
8107 },
8108 };
8109
8110 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8111 {
8112 unsigned int i;
8113 struct ibm_struct *ibm;
8114
8115 if (!kp || !kp->name || !val)
8116 return -EINVAL;
8117
8118 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8119 ibm = ibms_init[i].data;
8120 WARN_ON(ibm == NULL);
8121
8122 if (!ibm || !ibm->name)
8123 continue;
8124
8125 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8126 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8127 return -ENOSPC;
8128 strcpy(ibms_init[i].param, val);
8129 strcat(ibms_init[i].param, ",");
8130 return 0;
8131 }
8132 }
8133
8134 return -EINVAL;
8135 }
8136
8137 module_param(experimental, int, 0444);
8138 MODULE_PARM_DESC(experimental,
8139 "Enables experimental features when non-zero");
8140
8141 module_param_named(debug, dbg_level, uint, 0);
8142 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8143
8144 module_param(force_load, bool, 0444);
8145 MODULE_PARM_DESC(force_load,
8146 "Attempts to load the driver even on a "
8147 "mis-identified ThinkPad when true");
8148
8149 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8150 MODULE_PARM_DESC(fan_control,
8151 "Enables setting fan parameters features when true");
8152
8153 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8154 MODULE_PARM_DESC(brightness_mode,
8155 "Selects brightness control strategy: "
8156 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8157
8158 module_param(brightness_enable, uint, 0444);
8159 MODULE_PARM_DESC(brightness_enable,
8160 "Enables backlight control when 1, disables when 0");
8161
8162 module_param(hotkey_report_mode, uint, 0444);
8163 MODULE_PARM_DESC(hotkey_report_mode,
8164 "used for backwards compatibility with userspace, "
8165 "see documentation");
8166
8167 #define TPACPI_PARAM(feature) \
8168 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8169 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8170 "at module load, see documentation")
8171
8172 TPACPI_PARAM(hotkey);
8173 TPACPI_PARAM(bluetooth);
8174 TPACPI_PARAM(video);
8175 TPACPI_PARAM(light);
8176 TPACPI_PARAM(cmos);
8177 TPACPI_PARAM(led);
8178 TPACPI_PARAM(beep);
8179 TPACPI_PARAM(ecdump);
8180 TPACPI_PARAM(brightness);
8181 TPACPI_PARAM(volume);
8182 TPACPI_PARAM(fan);
8183
8184 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8185 module_param(dbg_wlswemul, uint, 0444);
8186 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8187 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8188 MODULE_PARM_DESC(wlsw_state,
8189 "Initial state of the emulated WLSW switch");
8190
8191 module_param(dbg_bluetoothemul, uint, 0444);
8192 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8193 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8194 MODULE_PARM_DESC(bluetooth_state,
8195 "Initial state of the emulated bluetooth switch");
8196
8197 module_param(dbg_wwanemul, uint, 0444);
8198 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8199 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8200 MODULE_PARM_DESC(wwan_state,
8201 "Initial state of the emulated WWAN switch");
8202
8203 module_param(dbg_uwbemul, uint, 0444);
8204 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8205 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8206 MODULE_PARM_DESC(uwb_state,
8207 "Initial state of the emulated UWB switch");
8208 #endif
8209
8210 static void thinkpad_acpi_module_exit(void)
8211 {
8212 struct ibm_struct *ibm, *itmp;
8213
8214 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8215
8216 list_for_each_entry_safe_reverse(ibm, itmp,
8217 &tpacpi_all_drivers,
8218 all_drivers) {
8219 ibm_exit(ibm);
8220 }
8221
8222 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8223
8224 if (tpacpi_inputdev) {
8225 if (tp_features.input_device_registered)
8226 input_unregister_device(tpacpi_inputdev);
8227 else
8228 input_free_device(tpacpi_inputdev);
8229 }
8230
8231 if (tpacpi_hwmon)
8232 hwmon_device_unregister(tpacpi_hwmon);
8233
8234 if (tp_features.sensors_pdev_attrs_registered)
8235 device_remove_file(&tpacpi_sensors_pdev->dev,
8236 &dev_attr_thinkpad_acpi_pdev_name);
8237 if (tpacpi_sensors_pdev)
8238 platform_device_unregister(tpacpi_sensors_pdev);
8239 if (tpacpi_pdev)
8240 platform_device_unregister(tpacpi_pdev);
8241
8242 if (tp_features.sensors_pdrv_attrs_registered)
8243 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8244 if (tp_features.platform_drv_attrs_registered)
8245 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8246
8247 if (tp_features.sensors_pdrv_registered)
8248 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8249
8250 if (tp_features.platform_drv_registered)
8251 platform_driver_unregister(&tpacpi_pdriver);
8252
8253 if (proc_dir)
8254 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8255
8256 if (tpacpi_wq)
8257 destroy_workqueue(tpacpi_wq);
8258
8259 kfree(thinkpad_id.bios_version_str);
8260 kfree(thinkpad_id.ec_version_str);
8261 kfree(thinkpad_id.model_str);
8262 }
8263
8264
8265 static int __init thinkpad_acpi_module_init(void)
8266 {
8267 int ret, i;
8268
8269 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8270
8271 /* Parameter checking */
8272 if (hotkey_report_mode > 2)
8273 return -EINVAL;
8274
8275 /* Driver-level probe */
8276
8277 ret = get_thinkpad_model_data(&thinkpad_id);
8278 if (ret) {
8279 printk(TPACPI_ERR
8280 "unable to get DMI data: %d\n", ret);
8281 thinkpad_acpi_module_exit();
8282 return ret;
8283 }
8284 ret = probe_for_thinkpad();
8285 if (ret) {
8286 thinkpad_acpi_module_exit();
8287 return ret;
8288 }
8289
8290 /* Driver initialization */
8291
8292 TPACPI_ACPIHANDLE_INIT(ecrd);
8293 TPACPI_ACPIHANDLE_INIT(ecwr);
8294
8295 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8296 if (!tpacpi_wq) {
8297 thinkpad_acpi_module_exit();
8298 return -ENOMEM;
8299 }
8300
8301 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8302 if (!proc_dir) {
8303 printk(TPACPI_ERR
8304 "unable to create proc dir " TPACPI_PROC_DIR);
8305 thinkpad_acpi_module_exit();
8306 return -ENODEV;
8307 }
8308 proc_dir->owner = THIS_MODULE;
8309
8310 ret = platform_driver_register(&tpacpi_pdriver);
8311 if (ret) {
8312 printk(TPACPI_ERR
8313 "unable to register main platform driver\n");
8314 thinkpad_acpi_module_exit();
8315 return ret;
8316 }
8317 tp_features.platform_drv_registered = 1;
8318
8319 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8320 if (ret) {
8321 printk(TPACPI_ERR
8322 "unable to register hwmon platform driver\n");
8323 thinkpad_acpi_module_exit();
8324 return ret;
8325 }
8326 tp_features.sensors_pdrv_registered = 1;
8327
8328 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8329 if (!ret) {
8330 tp_features.platform_drv_attrs_registered = 1;
8331 ret = tpacpi_create_driver_attributes(
8332 &tpacpi_hwmon_pdriver.driver);
8333 }
8334 if (ret) {
8335 printk(TPACPI_ERR
8336 "unable to create sysfs driver attributes\n");
8337 thinkpad_acpi_module_exit();
8338 return ret;
8339 }
8340 tp_features.sensors_pdrv_attrs_registered = 1;
8341
8342
8343 /* Device initialization */
8344 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8345 NULL, 0);
8346 if (IS_ERR(tpacpi_pdev)) {
8347 ret = PTR_ERR(tpacpi_pdev);
8348 tpacpi_pdev = NULL;
8349 printk(TPACPI_ERR "unable to register platform device\n");
8350 thinkpad_acpi_module_exit();
8351 return ret;
8352 }
8353 tpacpi_sensors_pdev = platform_device_register_simple(
8354 TPACPI_HWMON_DRVR_NAME,
8355 -1, NULL, 0);
8356 if (IS_ERR(tpacpi_sensors_pdev)) {
8357 ret = PTR_ERR(tpacpi_sensors_pdev);
8358 tpacpi_sensors_pdev = NULL;
8359 printk(TPACPI_ERR
8360 "unable to register hwmon platform device\n");
8361 thinkpad_acpi_module_exit();
8362 return ret;
8363 }
8364 ret = device_create_file(&tpacpi_sensors_pdev->dev,
8365 &dev_attr_thinkpad_acpi_pdev_name);
8366 if (ret) {
8367 printk(TPACPI_ERR
8368 "unable to create sysfs hwmon device attributes\n");
8369 thinkpad_acpi_module_exit();
8370 return ret;
8371 }
8372 tp_features.sensors_pdev_attrs_registered = 1;
8373 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8374 if (IS_ERR(tpacpi_hwmon)) {
8375 ret = PTR_ERR(tpacpi_hwmon);
8376 tpacpi_hwmon = NULL;
8377 printk(TPACPI_ERR "unable to register hwmon device\n");
8378 thinkpad_acpi_module_exit();
8379 return ret;
8380 }
8381 mutex_init(&tpacpi_inputdev_send_mutex);
8382 tpacpi_inputdev = input_allocate_device();
8383 if (!tpacpi_inputdev) {
8384 printk(TPACPI_ERR "unable to allocate input device\n");
8385 thinkpad_acpi_module_exit();
8386 return -ENOMEM;
8387 } else {
8388 /* Prepare input device, but don't register */
8389 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8390 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8391 tpacpi_inputdev->id.bustype = BUS_HOST;
8392 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8393 thinkpad_id.vendor :
8394 PCI_VENDOR_ID_IBM;
8395 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8396 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8397 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
8398 }
8399 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8400 ret = ibm_init(&ibms_init[i]);
8401 if (ret >= 0 && *ibms_init[i].param)
8402 ret = ibms_init[i].data->write(ibms_init[i].param);
8403 if (ret < 0) {
8404 thinkpad_acpi_module_exit();
8405 return ret;
8406 }
8407 }
8408 ret = input_register_device(tpacpi_inputdev);
8409 if (ret < 0) {
8410 printk(TPACPI_ERR "unable to register input device\n");
8411 thinkpad_acpi_module_exit();
8412 return ret;
8413 } else {
8414 tp_features.input_device_registered = 1;
8415 }
8416
8417 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8418 return 0;
8419 }
8420
8421 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8422
8423 /*
8424 * This will autoload the driver in almost every ThinkPad
8425 * in widespread use.
8426 *
8427 * Only _VERY_ old models, like the 240, 240x and 570 lack
8428 * the HKEY event interface.
8429 */
8430 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8431
8432 /*
8433 * DMI matching for module autoloading
8434 *
8435 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8436 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8437 *
8438 * Only models listed in thinkwiki will be supported, so add yours
8439 * if it is not there yet.
8440 */
8441 #define IBM_BIOS_MODULE_ALIAS(__type) \
8442 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8443
8444 /* Ancient thinkpad BIOSes have to be identified by
8445 * BIOS type or model number, and there are far less
8446 * BIOS types than model numbers... */
8447 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
8448
8449 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8450 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8451 MODULE_DESCRIPTION(TPACPI_DESC);
8452 MODULE_VERSION(TPACPI_VERSION);
8453 MODULE_LICENSE("GPL");
8454
8455 module_init(thinkpad_acpi_module_init);
8456 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree