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thinkpad-acpi: name event constants
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blob3910f2f3eada1af94ce24e05c8b106da4bb2701a
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 0x020500
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 /* printk headers */
215 #define TPACPI_LOG TPACPI_FILE ": "
216 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
217 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
218 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
219 #define TPACPI_ERR KERN_ERR TPACPI_LOG
220 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
221 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
222 #define TPACPI_INFO KERN_INFO TPACPI_LOG
223 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
224
225 /* Debugging printk groups */
226 #define TPACPI_DBG_ALL 0xffff
227 #define TPACPI_DBG_DISCLOSETASK 0x8000
228 #define TPACPI_DBG_INIT 0x0001
229 #define TPACPI_DBG_EXIT 0x0002
230 #define TPACPI_DBG_RFKILL 0x0004
231 #define TPACPI_DBG_HKEY 0x0008
232 #define TPACPI_DBG_FAN 0x0010
233 #define TPACPI_DBG_BRGHT 0x0020
234
235 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
236 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
237 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
238
239
240 /****************************************************************************
241 * Driver-wide structs and misc. variables
242 */
243
244 struct ibm_struct;
245
246 struct tp_acpi_drv_struct {
247 const struct acpi_device_id *hid;
248 struct acpi_driver *driver;
249
250 void (*notify) (struct ibm_struct *, u32);
251 acpi_handle *handle;
252 u32 type;
253 struct acpi_device *device;
254 };
255
256 struct ibm_struct {
257 char *name;
258
259 int (*read) (char *);
260 int (*write) (char *);
261 void (*exit) (void);
262 void (*resume) (void);
263 void (*suspend) (pm_message_t state);
264 void (*shutdown) (void);
265
266 struct list_head all_drivers;
267
268 struct tp_acpi_drv_struct *acpi;
269
270 struct {
271 u8 acpi_driver_registered:1;
272 u8 acpi_notify_installed:1;
273 u8 proc_created:1;
274 u8 init_called:1;
275 u8 experimental:1;
276 } flags;
277 };
278
279 struct ibm_init_struct {
280 char param[32];
281
282 int (*init) (struct ibm_init_struct *);
283 struct ibm_struct *data;
284 };
285
286 static struct {
287 u32 bluetooth:1;
288 u32 hotkey:1;
289 u32 hotkey_mask:1;
290 u32 hotkey_wlsw:1;
291 u32 hotkey_tablet:1;
292 u32 light:1;
293 u32 light_status:1;
294 u32 bright_16levels:1;
295 u32 bright_acpimode:1;
296 u32 wan:1;
297 u32 uwb:1;
298 u32 fan_ctrl_status_undef:1;
299 u32 second_fan:1;
300 u32 beep_needs_two_args:1;
301 u32 input_device_registered:1;
302 u32 platform_drv_registered:1;
303 u32 platform_drv_attrs_registered:1;
304 u32 sensors_pdrv_registered:1;
305 u32 sensors_pdrv_attrs_registered:1;
306 u32 sensors_pdev_attrs_registered:1;
307 u32 hotkey_poll_active:1;
308 } tp_features;
309
310 static struct {
311 u16 hotkey_mask_ff:1;
312 } tp_warned;
313
314 struct thinkpad_id_data {
315 unsigned int vendor; /* ThinkPad vendor:
316 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
317
318 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
319 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
320
321 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
322 u16 ec_model;
323 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
324 u16 ec_release;
325
326 char *model_str; /* ThinkPad T43 */
327 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
328 };
329 static struct thinkpad_id_data thinkpad_id;
330
331 static enum {
332 TPACPI_LIFE_INIT = 0,
333 TPACPI_LIFE_RUNNING,
334 TPACPI_LIFE_EXITING,
335 } tpacpi_lifecycle;
336
337 static int experimental;
338 static u32 dbg_level;
339
340 static struct workqueue_struct *tpacpi_wq;
341
342 enum led_status_t {
343 TPACPI_LED_OFF = 0,
344 TPACPI_LED_ON,
345 TPACPI_LED_BLINK,
346 };
347
348 /* Special LED class that can defer work */
349 struct tpacpi_led_classdev {
350 struct led_classdev led_classdev;
351 struct work_struct work;
352 enum led_status_t new_state;
353 unsigned int led;
354 };
355
356 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
357 static int dbg_wlswemul;
358 static int tpacpi_wlsw_emulstate;
359 static int dbg_bluetoothemul;
360 static int tpacpi_bluetooth_emulstate;
361 static int dbg_wwanemul;
362 static int tpacpi_wwan_emulstate;
363 static int dbg_uwbemul;
364 static int tpacpi_uwb_emulstate;
365 #endif
366
367
368 /*************************************************************************
369 * Debugging helpers
370 */
371
372 #define dbg_printk(a_dbg_level, format, arg...) \
373 do { if (dbg_level & (a_dbg_level)) \
374 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
375 } while (0)
376
377 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
378 #define vdbg_printk dbg_printk
379 static const char *str_supported(int is_supported);
380 #else
381 #define vdbg_printk(a_dbg_level, format, arg...) \
382 do { } while (0)
383 #endif
384
385 static void tpacpi_log_usertask(const char * const what)
386 {
387 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
388 what, task_tgid_vnr(current));
389 }
390
391 #define tpacpi_disclose_usertask(what, format, arg...) \
392 do { \
393 if (unlikely( \
394 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
395 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
396 printk(TPACPI_DEBUG "%s: PID %d: " format, \
397 what, task_tgid_vnr(current), ## arg); \
398 } \
399 } while (0)
400
401 /*
402 * Quirk handling helpers
403 *
404 * ThinkPad IDs and versions seen in the field so far
405 * are two-characters from the set [0-9A-Z], i.e. base 36.
406 *
407 * We use values well outside that range as specials.
408 */
409
410 #define TPACPI_MATCH_ANY 0xffffU
411 #define TPACPI_MATCH_UNKNOWN 0U
412
413 /* TPID('1', 'Y') == 0x5931 */
414 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
415
416 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
417 { .vendor = PCI_VENDOR_ID_IBM, \
418 .bios = TPID(__id1, __id2), \
419 .ec = TPACPI_MATCH_ANY, \
420 .quirks = (__quirk) }
421
422 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
423 { .vendor = PCI_VENDOR_ID_LENOVO, \
424 .bios = TPID(__id1, __id2), \
425 .ec = TPACPI_MATCH_ANY, \
426 .quirks = (__quirk) }
427
428 struct tpacpi_quirk {
429 unsigned int vendor;
430 u16 bios;
431 u16 ec;
432 unsigned long quirks;
433 };
434
435 /**
436 * tpacpi_check_quirks() - search BIOS/EC version on a list
437 * @qlist: array of &struct tpacpi_quirk
438 * @qlist_size: number of elements in @qlist
439 *
440 * Iterates over a quirks list until one is found that matches the
441 * ThinkPad's vendor, BIOS and EC model.
442 *
443 * Returns 0 if nothing matches, otherwise returns the quirks field of
444 * the matching &struct tpacpi_quirk entry.
445 *
446 * The match criteria is: vendor, ec and bios much match.
447 */
448 static unsigned long __init tpacpi_check_quirks(
449 const struct tpacpi_quirk *qlist,
450 unsigned int qlist_size)
451 {
452 while (qlist_size) {
453 if ((qlist->vendor == thinkpad_id.vendor ||
454 qlist->vendor == TPACPI_MATCH_ANY) &&
455 (qlist->bios == thinkpad_id.bios_model ||
456 qlist->bios == TPACPI_MATCH_ANY) &&
457 (qlist->ec == thinkpad_id.ec_model ||
458 qlist->ec == TPACPI_MATCH_ANY))
459 return qlist->quirks;
460
461 qlist_size--;
462 qlist++;
463 }
464 return 0;
465 }
466
467
468 /****************************************************************************
469 ****************************************************************************
470 *
471 * ACPI Helpers and device model
472 *
473 ****************************************************************************
474 ****************************************************************************/
475
476 /*************************************************************************
477 * ACPI basic handles
478 */
479
480 static acpi_handle root_handle;
481
482 #define TPACPI_HANDLE(object, parent, paths...) \
483 static acpi_handle object##_handle; \
484 static acpi_handle *object##_parent = &parent##_handle; \
485 static char *object##_path; \
486 static char *object##_paths[] = { paths }
487
488 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
489 "\\_SB.PCI.ISA.EC", /* 570 */
490 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
491 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
492 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
493 "\\_SB.PCI0.ICH3.EC0", /* R31 */
494 "\\_SB.PCI0.LPC.EC", /* all others */
495 );
496
497 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
498 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
499
500 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
501 /* T4x, X31, X40 */
502 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
503 "\\CMS", /* R40, R40e */
504 ); /* all others */
505
506 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
507 "^HKEY", /* R30, R31 */
508 "HKEY", /* all others */
509 ); /* 570 */
510
511 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
512 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
513 "\\_SB.PCI0.VID0", /* 770e */
514 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
515 "\\_SB.PCI0.AGP.VID", /* all others */
516 ); /* R30, R31 */
517
518
519 /*************************************************************************
520 * ACPI helpers
521 */
522
523 static int acpi_evalf(acpi_handle handle,
524 void *res, char *method, char *fmt, ...)
525 {
526 char *fmt0 = fmt;
527 struct acpi_object_list params;
528 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
529 struct acpi_buffer result, *resultp;
530 union acpi_object out_obj;
531 acpi_status status;
532 va_list ap;
533 char res_type;
534 int success;
535 int quiet;
536
537 if (!*fmt) {
538 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
539 return 0;
540 }
541
542 if (*fmt == 'q') {
543 quiet = 1;
544 fmt++;
545 } else
546 quiet = 0;
547
548 res_type = *(fmt++);
549
550 params.count = 0;
551 params.pointer = &in_objs[0];
552
553 va_start(ap, fmt);
554 while (*fmt) {
555 char c = *(fmt++);
556 switch (c) {
557 case 'd': /* int */
558 in_objs[params.count].integer.value = va_arg(ap, int);
559 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
560 break;
561 /* add more types as needed */
562 default:
563 printk(TPACPI_ERR "acpi_evalf() called "
564 "with invalid format character '%c'\n", c);
565 return 0;
566 }
567 }
568 va_end(ap);
569
570 if (res_type != 'v') {
571 result.length = sizeof(out_obj);
572 result.pointer = &out_obj;
573 resultp = &result;
574 } else
575 resultp = NULL;
576
577 status = acpi_evaluate_object(handle, method, &params, resultp);
578
579 switch (res_type) {
580 case 'd': /* int */
581 if (res)
582 *(int *)res = out_obj.integer.value;
583 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
584 break;
585 case 'v': /* void */
586 success = status == AE_OK;
587 break;
588 /* add more types as needed */
589 default:
590 printk(TPACPI_ERR "acpi_evalf() called "
591 "with invalid format character '%c'\n", res_type);
592 return 0;
593 }
594
595 if (!success && !quiet)
596 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
597 method, fmt0, status);
598
599 return success;
600 }
601
602 static int acpi_ec_read(int i, u8 *p)
603 {
604 int v;
605
606 if (ecrd_handle) {
607 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
608 return 0;
609 *p = v;
610 } else {
611 if (ec_read(i, p) < 0)
612 return 0;
613 }
614
615 return 1;
616 }
617
618 static int acpi_ec_write(int i, u8 v)
619 {
620 if (ecwr_handle) {
621 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
622 return 0;
623 } else {
624 if (ec_write(i, v) < 0)
625 return 0;
626 }
627
628 return 1;
629 }
630
631 static int issue_thinkpad_cmos_command(int cmos_cmd)
632 {
633 if (!cmos_handle)
634 return -ENXIO;
635
636 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
637 return -EIO;
638
639 return 0;
640 }
641
642 /*************************************************************************
643 * ACPI device model
644 */
645
646 #define TPACPI_ACPIHANDLE_INIT(object) \
647 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
648 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
649
650 static void drv_acpi_handle_init(char *name,
651 acpi_handle *handle, acpi_handle parent,
652 char **paths, int num_paths, char **path)
653 {
654 int i;
655 acpi_status status;
656
657 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
658 name);
659
660 for (i = 0; i < num_paths; i++) {
661 status = acpi_get_handle(parent, paths[i], handle);
662 if (ACPI_SUCCESS(status)) {
663 *path = paths[i];
664 dbg_printk(TPACPI_DBG_INIT,
665 "Found ACPI handle %s for %s\n",
666 *path, name);
667 return;
668 }
669 }
670
671 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
672 name);
673 *handle = NULL;
674 }
675
676 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
677 {
678 struct ibm_struct *ibm = data;
679
680 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
681 return;
682
683 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
684 return;
685
686 ibm->acpi->notify(ibm, event);
687 }
688
689 static int __init setup_acpi_notify(struct ibm_struct *ibm)
690 {
691 acpi_status status;
692 int rc;
693
694 BUG_ON(!ibm->acpi);
695
696 if (!*ibm->acpi->handle)
697 return 0;
698
699 vdbg_printk(TPACPI_DBG_INIT,
700 "setting up ACPI notify for %s\n", ibm->name);
701
702 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
703 if (rc < 0) {
704 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
705 ibm->name, rc);
706 return -ENODEV;
707 }
708
709 ibm->acpi->device->driver_data = ibm;
710 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
711 TPACPI_ACPI_EVENT_PREFIX,
712 ibm->name);
713
714 status = acpi_install_notify_handler(*ibm->acpi->handle,
715 ibm->acpi->type, dispatch_acpi_notify, ibm);
716 if (ACPI_FAILURE(status)) {
717 if (status == AE_ALREADY_EXISTS) {
718 printk(TPACPI_NOTICE
719 "another device driver is already "
720 "handling %s events\n", ibm->name);
721 } else {
722 printk(TPACPI_ERR
723 "acpi_install_notify_handler(%s) failed: %d\n",
724 ibm->name, status);
725 }
726 return -ENODEV;
727 }
728 ibm->flags.acpi_notify_installed = 1;
729 return 0;
730 }
731
732 static int __init tpacpi_device_add(struct acpi_device *device)
733 {
734 return 0;
735 }
736
737 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
738 {
739 int rc;
740
741 dbg_printk(TPACPI_DBG_INIT,
742 "registering %s as an ACPI driver\n", ibm->name);
743
744 BUG_ON(!ibm->acpi);
745
746 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
747 if (!ibm->acpi->driver) {
748 printk(TPACPI_ERR
749 "failed to allocate memory for ibm->acpi->driver\n");
750 return -ENOMEM;
751 }
752
753 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
754 ibm->acpi->driver->ids = ibm->acpi->hid;
755
756 ibm->acpi->driver->ops.add = &tpacpi_device_add;
757
758 rc = acpi_bus_register_driver(ibm->acpi->driver);
759 if (rc < 0) {
760 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
761 ibm->name, rc);
762 kfree(ibm->acpi->driver);
763 ibm->acpi->driver = NULL;
764 } else if (!rc)
765 ibm->flags.acpi_driver_registered = 1;
766
767 return rc;
768 }
769
770
771 /****************************************************************************
772 ****************************************************************************
773 *
774 * Procfs Helpers
775 *
776 ****************************************************************************
777 ****************************************************************************/
778
779 static int dispatch_procfs_read(char *page, char **start, off_t off,
780 int count, int *eof, void *data)
781 {
782 struct ibm_struct *ibm = data;
783 int len;
784
785 if (!ibm || !ibm->read)
786 return -EINVAL;
787
788 len = ibm->read(page);
789 if (len < 0)
790 return len;
791
792 if (len <= off + count)
793 *eof = 1;
794 *start = page + off;
795 len -= off;
796 if (len > count)
797 len = count;
798 if (len < 0)
799 len = 0;
800
801 return len;
802 }
803
804 static int dispatch_procfs_write(struct file *file,
805 const char __user *userbuf,
806 unsigned long count, void *data)
807 {
808 struct ibm_struct *ibm = data;
809 char *kernbuf;
810 int ret;
811
812 if (!ibm || !ibm->write)
813 return -EINVAL;
814 if (count > PAGE_SIZE - 2)
815 return -EINVAL;
816
817 kernbuf = kmalloc(count + 2, GFP_KERNEL);
818 if (!kernbuf)
819 return -ENOMEM;
820
821 if (copy_from_user(kernbuf, userbuf, count)) {
822 kfree(kernbuf);
823 return -EFAULT;
824 }
825
826 kernbuf[count] = 0;
827 strcat(kernbuf, ",");
828 ret = ibm->write(kernbuf);
829 if (ret == 0)
830 ret = count;
831
832 kfree(kernbuf);
833
834 return ret;
835 }
836
837 static char *next_cmd(char **cmds)
838 {
839 char *start = *cmds;
840 char *end;
841
842 while ((end = strchr(start, ',')) && end == start)
843 start = end + 1;
844
845 if (!end)
846 return NULL;
847
848 *end = 0;
849 *cmds = end + 1;
850 return start;
851 }
852
853
854 /****************************************************************************
855 ****************************************************************************
856 *
857 * Device model: input, hwmon and platform
858 *
859 ****************************************************************************
860 ****************************************************************************/
861
862 static struct platform_device *tpacpi_pdev;
863 static struct platform_device *tpacpi_sensors_pdev;
864 static struct device *tpacpi_hwmon;
865 static struct input_dev *tpacpi_inputdev;
866 static struct mutex tpacpi_inputdev_send_mutex;
867 static LIST_HEAD(tpacpi_all_drivers);
868
869 static int tpacpi_suspend_handler(struct platform_device *pdev,
870 pm_message_t state)
871 {
872 struct ibm_struct *ibm, *itmp;
873
874 list_for_each_entry_safe(ibm, itmp,
875 &tpacpi_all_drivers,
876 all_drivers) {
877 if (ibm->suspend)
878 (ibm->suspend)(state);
879 }
880
881 return 0;
882 }
883
884 static int tpacpi_resume_handler(struct platform_device *pdev)
885 {
886 struct ibm_struct *ibm, *itmp;
887
888 list_for_each_entry_safe(ibm, itmp,
889 &tpacpi_all_drivers,
890 all_drivers) {
891 if (ibm->resume)
892 (ibm->resume)();
893 }
894
895 return 0;
896 }
897
898 static void tpacpi_shutdown_handler(struct platform_device *pdev)
899 {
900 struct ibm_struct *ibm, *itmp;
901
902 list_for_each_entry_safe(ibm, itmp,
903 &tpacpi_all_drivers,
904 all_drivers) {
905 if (ibm->shutdown)
906 (ibm->shutdown)();
907 }
908 }
909
910 static struct platform_driver tpacpi_pdriver = {
911 .driver = {
912 .name = TPACPI_DRVR_NAME,
913 .owner = THIS_MODULE,
914 },
915 .suspend = tpacpi_suspend_handler,
916 .resume = tpacpi_resume_handler,
917 .shutdown = tpacpi_shutdown_handler,
918 };
919
920 static struct platform_driver tpacpi_hwmon_pdriver = {
921 .driver = {
922 .name = TPACPI_HWMON_DRVR_NAME,
923 .owner = THIS_MODULE,
924 },
925 };
926
927 /*************************************************************************
928 * sysfs support helpers
929 */
930
931 struct attribute_set {
932 unsigned int members, max_members;
933 struct attribute_group group;
934 };
935
936 struct attribute_set_obj {
937 struct attribute_set s;
938 struct attribute *a;
939 } __attribute__((packed));
940
941 static struct attribute_set *create_attr_set(unsigned int max_members,
942 const char *name)
943 {
944 struct attribute_set_obj *sobj;
945
946 if (max_members == 0)
947 return NULL;
948
949 /* Allocates space for implicit NULL at the end too */
950 sobj = kzalloc(sizeof(struct attribute_set_obj) +
951 max_members * sizeof(struct attribute *),
952 GFP_KERNEL);
953 if (!sobj)
954 return NULL;
955 sobj->s.max_members = max_members;
956 sobj->s.group.attrs = &sobj->a;
957 sobj->s.group.name = name;
958
959 return &sobj->s;
960 }
961
962 #define destroy_attr_set(_set) \
963 kfree(_set);
964
965 /* not multi-threaded safe, use it in a single thread per set */
966 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
967 {
968 if (!s || !attr)
969 return -EINVAL;
970
971 if (s->members >= s->max_members)
972 return -ENOMEM;
973
974 s->group.attrs[s->members] = attr;
975 s->members++;
976
977 return 0;
978 }
979
980 static int add_many_to_attr_set(struct attribute_set *s,
981 struct attribute **attr,
982 unsigned int count)
983 {
984 int i, res;
985
986 for (i = 0; i < count; i++) {
987 res = add_to_attr_set(s, attr[i]);
988 if (res)
989 return res;
990 }
991
992 return 0;
993 }
994
995 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
996 {
997 sysfs_remove_group(kobj, &s->group);
998 destroy_attr_set(s);
999 }
1000
1001 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1002 sysfs_create_group(_kobj, &_attr_set->group)
1003
1004 static int parse_strtoul(const char *buf,
1005 unsigned long max, unsigned long *value)
1006 {
1007 char *endp;
1008
1009 while (*buf && isspace(*buf))
1010 buf++;
1011 *value = simple_strtoul(buf, &endp, 0);
1012 while (*endp && isspace(*endp))
1013 endp++;
1014 if (*endp || *value > max)
1015 return -EINVAL;
1016
1017 return 0;
1018 }
1019
1020 static void tpacpi_disable_brightness_delay(void)
1021 {
1022 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1023 printk(TPACPI_NOTICE
1024 "ACPI backlight control delay disabled\n");
1025 }
1026
1027 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1028 {
1029 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1030 union acpi_object *obj;
1031 int rc;
1032
1033 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1034 obj = (union acpi_object *)buffer.pointer;
1035 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1036 printk(TPACPI_ERR "Unknown _BCL data, "
1037 "please report this to %s\n", TPACPI_MAIL);
1038 rc = 0;
1039 } else {
1040 rc = obj->package.count;
1041 }
1042 } else {
1043 return 0;
1044 }
1045
1046 kfree(buffer.pointer);
1047 return rc;
1048 }
1049
1050 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1051 u32 lvl, void *context, void **rv)
1052 {
1053 char name[ACPI_PATH_SEGMENT_LENGTH];
1054 struct acpi_buffer buffer = { sizeof(name), &name };
1055
1056 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1057 !strncmp("_BCL", name, sizeof(name) - 1)) {
1058 BUG_ON(!rv || !*rv);
1059 **(int **)rv = tpacpi_query_bcl_levels(handle);
1060 return AE_CTRL_TERMINATE;
1061 } else {
1062 return AE_OK;
1063 }
1064 }
1065
1066 /*
1067 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1068 */
1069 static int __init tpacpi_check_std_acpi_brightness_support(void)
1070 {
1071 int status;
1072 int bcl_levels = 0;
1073 void *bcl_ptr = &bcl_levels;
1074
1075 if (!vid_handle) {
1076 TPACPI_ACPIHANDLE_INIT(vid);
1077 }
1078 if (!vid_handle)
1079 return 0;
1080
1081 /*
1082 * Search for a _BCL method, and execute it. This is safe on all
1083 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1084 * BIOS in ACPI backlight control mode. We do NOT have to care
1085 * about calling the _BCL method in an enabled video device, any
1086 * will do for our purposes.
1087 */
1088
1089 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1090 tpacpi_acpi_walk_find_bcl, NULL,
1091 &bcl_ptr);
1092
1093 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1094 tp_features.bright_acpimode = 1;
1095 return (bcl_levels - 2);
1096 }
1097
1098 return 0;
1099 }
1100
1101 static void printk_deprecated_attribute(const char * const what,
1102 const char * const details)
1103 {
1104 tpacpi_log_usertask("deprecated sysfs attribute");
1105 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1106 "will be removed. %s\n",
1107 what, details);
1108 }
1109
1110 /*************************************************************************
1111 * rfkill and radio control support helpers
1112 */
1113
1114 /*
1115 * ThinkPad-ACPI firmware handling model:
1116 *
1117 * WLSW (master wireless switch) is event-driven, and is common to all
1118 * firmware-controlled radios. It cannot be controlled, just monitored,
1119 * as expected. It overrides all radio state in firmware
1120 *
1121 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1122 * (TODO: verify how WLSW interacts with the returned radio state).
1123 *
1124 * The only time there are shadow radio state changes, is when
1125 * masked-off hotkeys are used.
1126 */
1127
1128 /*
1129 * Internal driver API for radio state:
1130 *
1131 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1132 * bool: true means radio blocked (off)
1133 */
1134 enum tpacpi_rfkill_state {
1135 TPACPI_RFK_RADIO_OFF = 0,
1136 TPACPI_RFK_RADIO_ON
1137 };
1138
1139 /* rfkill switches */
1140 enum tpacpi_rfk_id {
1141 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1142 TPACPI_RFK_WWAN_SW_ID,
1143 TPACPI_RFK_UWB_SW_ID,
1144 TPACPI_RFK_SW_MAX
1145 };
1146
1147 static const char *tpacpi_rfkill_names[] = {
1148 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1149 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1150 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1151 [TPACPI_RFK_SW_MAX] = NULL
1152 };
1153
1154 /* ThinkPad-ACPI rfkill subdriver */
1155 struct tpacpi_rfk {
1156 struct rfkill *rfkill;
1157 enum tpacpi_rfk_id id;
1158 const struct tpacpi_rfk_ops *ops;
1159 };
1160
1161 struct tpacpi_rfk_ops {
1162 /* firmware interface */
1163 int (*get_status)(void);
1164 int (*set_status)(const enum tpacpi_rfkill_state);
1165 };
1166
1167 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1168
1169 /* Query FW and update rfkill sw state for a given rfkill switch */
1170 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1171 {
1172 int status;
1173
1174 if (!tp_rfk)
1175 return -ENODEV;
1176
1177 status = (tp_rfk->ops->get_status)();
1178 if (status < 0)
1179 return status;
1180
1181 rfkill_set_sw_state(tp_rfk->rfkill,
1182 (status == TPACPI_RFK_RADIO_OFF));
1183
1184 return status;
1185 }
1186
1187 /* Query FW and update rfkill sw state for all rfkill switches */
1188 static void tpacpi_rfk_update_swstate_all(void)
1189 {
1190 unsigned int i;
1191
1192 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1193 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1194 }
1195
1196 /*
1197 * Sync the HW-blocking state of all rfkill switches,
1198 * do notice it causes the rfkill core to schedule uevents
1199 */
1200 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1201 {
1202 unsigned int i;
1203 struct tpacpi_rfk *tp_rfk;
1204
1205 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1206 tp_rfk = tpacpi_rfkill_switches[i];
1207 if (tp_rfk) {
1208 if (rfkill_set_hw_state(tp_rfk->rfkill,
1209 blocked)) {
1210 /* ignore -- we track sw block */
1211 }
1212 }
1213 }
1214 }
1215
1216 /* Call to get the WLSW state from the firmware */
1217 static int hotkey_get_wlsw(void);
1218
1219 /* Call to query WLSW state and update all rfkill switches */
1220 static bool tpacpi_rfk_check_hwblock_state(void)
1221 {
1222 int res = hotkey_get_wlsw();
1223 int hw_blocked;
1224
1225 /* When unknown or unsupported, we have to assume it is unblocked */
1226 if (res < 0)
1227 return false;
1228
1229 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1230 tpacpi_rfk_update_hwblock_state(hw_blocked);
1231
1232 return hw_blocked;
1233 }
1234
1235 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1236 {
1237 struct tpacpi_rfk *tp_rfk = data;
1238 int res;
1239
1240 dbg_printk(TPACPI_DBG_RFKILL,
1241 "request to change radio state to %s\n",
1242 blocked ? "blocked" : "unblocked");
1243
1244 /* try to set radio state */
1245 res = (tp_rfk->ops->set_status)(blocked ?
1246 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1247
1248 /* and update the rfkill core with whatever the FW really did */
1249 tpacpi_rfk_update_swstate(tp_rfk);
1250
1251 return (res < 0) ? res : 0;
1252 }
1253
1254 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1255 .set_block = tpacpi_rfk_hook_set_block,
1256 };
1257
1258 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1259 const struct tpacpi_rfk_ops *tp_rfkops,
1260 const enum rfkill_type rfktype,
1261 const char *name,
1262 const bool set_default)
1263 {
1264 struct tpacpi_rfk *atp_rfk;
1265 int res;
1266 bool sw_state = false;
1267 int sw_status;
1268
1269 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1270
1271 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1272 if (atp_rfk)
1273 atp_rfk->rfkill = rfkill_alloc(name,
1274 &tpacpi_pdev->dev,
1275 rfktype,
1276 &tpacpi_rfk_rfkill_ops,
1277 atp_rfk);
1278 if (!atp_rfk || !atp_rfk->rfkill) {
1279 printk(TPACPI_ERR
1280 "failed to allocate memory for rfkill class\n");
1281 kfree(atp_rfk);
1282 return -ENOMEM;
1283 }
1284
1285 atp_rfk->id = id;
1286 atp_rfk->ops = tp_rfkops;
1287
1288 sw_status = (tp_rfkops->get_status)();
1289 if (sw_status < 0) {
1290 printk(TPACPI_ERR
1291 "failed to read initial state for %s, error %d\n",
1292 name, sw_status);
1293 } else {
1294 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1295 if (set_default) {
1296 /* try to keep the initial state, since we ask the
1297 * firmware to preserve it across S5 in NVRAM */
1298 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1299 }
1300 }
1301 rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1302
1303 res = rfkill_register(atp_rfk->rfkill);
1304 if (res < 0) {
1305 printk(TPACPI_ERR
1306 "failed to register %s rfkill switch: %d\n",
1307 name, res);
1308 rfkill_destroy(atp_rfk->rfkill);
1309 kfree(atp_rfk);
1310 return res;
1311 }
1312
1313 tpacpi_rfkill_switches[id] = atp_rfk;
1314 return 0;
1315 }
1316
1317 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1318 {
1319 struct tpacpi_rfk *tp_rfk;
1320
1321 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1322
1323 tp_rfk = tpacpi_rfkill_switches[id];
1324 if (tp_rfk) {
1325 rfkill_unregister(tp_rfk->rfkill);
1326 rfkill_destroy(tp_rfk->rfkill);
1327 tpacpi_rfkill_switches[id] = NULL;
1328 kfree(tp_rfk);
1329 }
1330 }
1331
1332 static void printk_deprecated_rfkill_attribute(const char * const what)
1333 {
1334 printk_deprecated_attribute(what,
1335 "Please switch to generic rfkill before year 2010");
1336 }
1337
1338 /* sysfs <radio> enable ------------------------------------------------ */
1339 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1340 struct device_attribute *attr,
1341 char *buf)
1342 {
1343 int status;
1344
1345 printk_deprecated_rfkill_attribute(attr->attr.name);
1346
1347 /* This is in the ABI... */
1348 if (tpacpi_rfk_check_hwblock_state()) {
1349 status = TPACPI_RFK_RADIO_OFF;
1350 } else {
1351 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1352 if (status < 0)
1353 return status;
1354 }
1355
1356 return snprintf(buf, PAGE_SIZE, "%d\n",
1357 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1358 }
1359
1360 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1361 struct device_attribute *attr,
1362 const char *buf, size_t count)
1363 {
1364 unsigned long t;
1365 int res;
1366
1367 printk_deprecated_rfkill_attribute(attr->attr.name);
1368
1369 if (parse_strtoul(buf, 1, &t))
1370 return -EINVAL;
1371
1372 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1373
1374 /* This is in the ABI... */
1375 if (tpacpi_rfk_check_hwblock_state() && !!t)
1376 return -EPERM;
1377
1378 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1379 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1380 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1381
1382 return (res < 0) ? res : count;
1383 }
1384
1385 /* procfs -------------------------------------------------------------- */
1386 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1387 {
1388 int len = 0;
1389
1390 if (id >= TPACPI_RFK_SW_MAX)
1391 len += sprintf(p + len, "status:\t\tnot supported\n");
1392 else {
1393 int status;
1394
1395 /* This is in the ABI... */
1396 if (tpacpi_rfk_check_hwblock_state()) {
1397 status = TPACPI_RFK_RADIO_OFF;
1398 } else {
1399 status = tpacpi_rfk_update_swstate(
1400 tpacpi_rfkill_switches[id]);
1401 if (status < 0)
1402 return status;
1403 }
1404
1405 len += sprintf(p + len, "status:\t\t%s\n",
1406 (status == TPACPI_RFK_RADIO_ON) ?
1407 "enabled" : "disabled");
1408 len += sprintf(p + len, "commands:\tenable, disable\n");
1409 }
1410
1411 return len;
1412 }
1413
1414 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1415 {
1416 char *cmd;
1417 int status = -1;
1418 int res = 0;
1419
1420 if (id >= TPACPI_RFK_SW_MAX)
1421 return -ENODEV;
1422
1423 while ((cmd = next_cmd(&buf))) {
1424 if (strlencmp(cmd, "enable") == 0)
1425 status = TPACPI_RFK_RADIO_ON;
1426 else if (strlencmp(cmd, "disable") == 0)
1427 status = TPACPI_RFK_RADIO_OFF;
1428 else
1429 return -EINVAL;
1430 }
1431
1432 if (status != -1) {
1433 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1434 (status == TPACPI_RFK_RADIO_ON) ?
1435 "enable" : "disable",
1436 tpacpi_rfkill_names[id]);
1437 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1438 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1439 }
1440
1441 return res;
1442 }
1443
1444 /*************************************************************************
1445 * thinkpad-acpi driver attributes
1446 */
1447
1448 /* interface_version --------------------------------------------------- */
1449 static ssize_t tpacpi_driver_interface_version_show(
1450 struct device_driver *drv,
1451 char *buf)
1452 {
1453 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1454 }
1455
1456 static DRIVER_ATTR(interface_version, S_IRUGO,
1457 tpacpi_driver_interface_version_show, NULL);
1458
1459 /* debug_level --------------------------------------------------------- */
1460 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1461 char *buf)
1462 {
1463 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1464 }
1465
1466 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1467 const char *buf, size_t count)
1468 {
1469 unsigned long t;
1470
1471 if (parse_strtoul(buf, 0xffff, &t))
1472 return -EINVAL;
1473
1474 dbg_level = t;
1475
1476 return count;
1477 }
1478
1479 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1480 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1481
1482 /* version ------------------------------------------------------------- */
1483 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1484 char *buf)
1485 {
1486 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1487 TPACPI_DESC, TPACPI_VERSION);
1488 }
1489
1490 static DRIVER_ATTR(version, S_IRUGO,
1491 tpacpi_driver_version_show, NULL);
1492
1493 /* --------------------------------------------------------------------- */
1494
1495 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1496
1497 /* wlsw_emulstate ------------------------------------------------------ */
1498 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1499 char *buf)
1500 {
1501 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1502 }
1503
1504 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1505 const char *buf, size_t count)
1506 {
1507 unsigned long t;
1508
1509 if (parse_strtoul(buf, 1, &t))
1510 return -EINVAL;
1511
1512 if (tpacpi_wlsw_emulstate != !!t) {
1513 tpacpi_wlsw_emulstate = !!t;
1514 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1515 }
1516
1517 return count;
1518 }
1519
1520 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1521 tpacpi_driver_wlsw_emulstate_show,
1522 tpacpi_driver_wlsw_emulstate_store);
1523
1524 /* bluetooth_emulstate ------------------------------------------------- */
1525 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1526 struct device_driver *drv,
1527 char *buf)
1528 {
1529 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1530 }
1531
1532 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1533 struct device_driver *drv,
1534 const char *buf, size_t count)
1535 {
1536 unsigned long t;
1537
1538 if (parse_strtoul(buf, 1, &t))
1539 return -EINVAL;
1540
1541 tpacpi_bluetooth_emulstate = !!t;
1542
1543 return count;
1544 }
1545
1546 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1547 tpacpi_driver_bluetooth_emulstate_show,
1548 tpacpi_driver_bluetooth_emulstate_store);
1549
1550 /* wwan_emulstate ------------------------------------------------- */
1551 static ssize_t tpacpi_driver_wwan_emulstate_show(
1552 struct device_driver *drv,
1553 char *buf)
1554 {
1555 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1556 }
1557
1558 static ssize_t tpacpi_driver_wwan_emulstate_store(
1559 struct device_driver *drv,
1560 const char *buf, size_t count)
1561 {
1562 unsigned long t;
1563
1564 if (parse_strtoul(buf, 1, &t))
1565 return -EINVAL;
1566
1567 tpacpi_wwan_emulstate = !!t;
1568
1569 return count;
1570 }
1571
1572 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1573 tpacpi_driver_wwan_emulstate_show,
1574 tpacpi_driver_wwan_emulstate_store);
1575
1576 /* uwb_emulstate ------------------------------------------------- */
1577 static ssize_t tpacpi_driver_uwb_emulstate_show(
1578 struct device_driver *drv,
1579 char *buf)
1580 {
1581 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1582 }
1583
1584 static ssize_t tpacpi_driver_uwb_emulstate_store(
1585 struct device_driver *drv,
1586 const char *buf, size_t count)
1587 {
1588 unsigned long t;
1589
1590 if (parse_strtoul(buf, 1, &t))
1591 return -EINVAL;
1592
1593 tpacpi_uwb_emulstate = !!t;
1594
1595 return count;
1596 }
1597
1598 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1599 tpacpi_driver_uwb_emulstate_show,
1600 tpacpi_driver_uwb_emulstate_store);
1601 #endif
1602
1603 /* --------------------------------------------------------------------- */
1604
1605 static struct driver_attribute *tpacpi_driver_attributes[] = {
1606 &driver_attr_debug_level, &driver_attr_version,
1607 &driver_attr_interface_version,
1608 };
1609
1610 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1611 {
1612 int i, res;
1613
1614 i = 0;
1615 res = 0;
1616 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1617 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1618 i++;
1619 }
1620
1621 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1622 if (!res && dbg_wlswemul)
1623 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1624 if (!res && dbg_bluetoothemul)
1625 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1626 if (!res && dbg_wwanemul)
1627 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1628 if (!res && dbg_uwbemul)
1629 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1630 #endif
1631
1632 return res;
1633 }
1634
1635 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1636 {
1637 int i;
1638
1639 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1640 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1641
1642 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1643 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1644 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1645 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1646 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1647 #endif
1648 }
1649
1650 /*************************************************************************
1651 * Firmware Data
1652 */
1653
1654 /*
1655 * Table of recommended minimum BIOS versions
1656 *
1657 * Reasons for listing:
1658 * 1. Stable BIOS, listed because the unknown ammount of
1659 * bugs and bad ACPI behaviour on older versions
1660 *
1661 * 2. BIOS or EC fw with known bugs that trigger on Linux
1662 *
1663 * 3. BIOS with known reduced functionality in older versions
1664 *
1665 * We recommend the latest BIOS and EC version.
1666 * We only support the latest BIOS and EC fw version as a rule.
1667 *
1668 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1669 * Information from users in ThinkWiki
1670 *
1671 * WARNING: we use this table also to detect that the machine is
1672 * a ThinkPad in some cases, so don't remove entries lightly.
1673 */
1674
1675 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1676 { .vendor = (__v), \
1677 .bios = TPID(__id1, __id2), \
1678 .ec = TPACPI_MATCH_ANY, \
1679 .quirks = TPACPI_MATCH_ANY << 16 \
1680 | (__bv1) << 8 | (__bv2) }
1681
1682 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1683 __eid1, __eid2, __ev1, __ev2) \
1684 { .vendor = (__v), \
1685 .bios = TPID(__bid1, __bid2), \
1686 .ec = TPID(__eid1, __eid2), \
1687 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1688 | (__bv1) << 8 | (__bv2) }
1689
1690 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1691 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1692
1693 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1694 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1695 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1696
1697 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1698 __eid1, __eid2, __ev1, __ev2) \
1699 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1700 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1701
1702 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1703 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1704
1705 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1706 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1707 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1708
1709 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1710 __eid1, __eid2, __ev1, __ev2) \
1711 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1712 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1713
1714 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1715 /* Numeric models ------------------ */
1716 /* FW MODEL BIOS VERS */
1717 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1718 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1719 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1720 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1721 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1722 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1723 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1724 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1725 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1726
1727 /* A-series ------------------------- */
1728 /* FW MODEL BIOS VERS EC VERS */
1729 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1730 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1731 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1732 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1733 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1734 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1735 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1736 TPV_QI0('1', '3', '2', '0'), /* A22m */
1737 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1738 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1739 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1740
1741 /* G-series ------------------------- */
1742 /* FW MODEL BIOS VERS */
1743 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1744 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1745
1746 /* R-series, T-series --------------- */
1747 /* FW MODEL BIOS VERS EC VERS */
1748 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1749 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1750 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1751 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1752 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1753 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1754 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1755 T40/p, T41/p, T42/p (1) */
1756 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1757 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1758 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1759 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1760
1761 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1762 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1763 TPV_QI0('1', '6', '3', '2'), /* T22 */
1764 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1765 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1766 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1767
1768 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1769 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1770 TPV_QL0('7', 'E', 'D', '0'), /* R60e, R60i */
1771
1772 /* BIOS FW BIOS VERS EC FW EC VERS */
1773 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1774 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1775
1776 /* X-series ------------------------- */
1777 /* FW MODEL BIOS VERS EC VERS */
1778 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1779 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1780 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1781 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1782 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1783 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1784 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1785
1786 TPV_QL0('7', 'B', 'D', '7'), /* X60/s */
1787 TPV_QL0('7', 'J', '3', '0'), /* X60t */
1788
1789 /* (0) - older versions lack DMI EC fw string and functionality */
1790 /* (1) - older versions known to lack functionality */
1791 };
1792
1793 #undef TPV_QL1
1794 #undef TPV_QL0
1795 #undef TPV_QI2
1796 #undef TPV_QI1
1797 #undef TPV_QI0
1798 #undef TPV_Q_X
1799 #undef TPV_Q
1800
1801 static void __init tpacpi_check_outdated_fw(void)
1802 {
1803 unsigned long fwvers;
1804 u16 ec_version, bios_version;
1805
1806 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1807 ARRAY_SIZE(tpacpi_bios_version_qtable));
1808
1809 if (!fwvers)
1810 return;
1811
1812 bios_version = fwvers & 0xffffU;
1813 ec_version = (fwvers >> 16) & 0xffffU;
1814
1815 /* note that unknown versions are set to 0x0000 and we use that */
1816 if ((bios_version > thinkpad_id.bios_release) ||
1817 (ec_version > thinkpad_id.ec_release &&
1818 ec_version != TPACPI_MATCH_ANY)) {
1819 /*
1820 * The changelogs would let us track down the exact
1821 * reason, but it is just too much of a pain to track
1822 * it. We only list BIOSes that are either really
1823 * broken, or really stable to begin with, so it is
1824 * best if the user upgrades the firmware anyway.
1825 */
1826 printk(TPACPI_WARN
1827 "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1828 printk(TPACPI_WARN
1829 "WARNING: This firmware may be missing critical bug "
1830 "fixes and/or important features\n");
1831 }
1832 }
1833
1834 static bool __init tpacpi_is_fw_known(void)
1835 {
1836 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1837 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1838 }
1839
1840 /****************************************************************************
1841 ****************************************************************************
1842 *
1843 * Subdrivers
1844 *
1845 ****************************************************************************
1846 ****************************************************************************/
1847
1848 /*************************************************************************
1849 * thinkpad-acpi init subdriver
1850 */
1851
1852 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1853 {
1854 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1855 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1856
1857 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1858 (thinkpad_id.bios_version_str) ?
1859 thinkpad_id.bios_version_str : "unknown",
1860 (thinkpad_id.ec_version_str) ?
1861 thinkpad_id.ec_version_str : "unknown");
1862
1863 if (thinkpad_id.vendor && thinkpad_id.model_str)
1864 printk(TPACPI_INFO "%s %s, model %s\n",
1865 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1866 "IBM" : ((thinkpad_id.vendor ==
1867 PCI_VENDOR_ID_LENOVO) ?
1868 "Lenovo" : "Unknown vendor"),
1869 thinkpad_id.model_str,
1870 (thinkpad_id.nummodel_str) ?
1871 thinkpad_id.nummodel_str : "unknown");
1872
1873 tpacpi_check_outdated_fw();
1874 return 0;
1875 }
1876
1877 static int thinkpad_acpi_driver_read(char *p)
1878 {
1879 int len = 0;
1880
1881 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1882 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1883
1884 return len;
1885 }
1886
1887 static struct ibm_struct thinkpad_acpi_driver_data = {
1888 .name = "driver",
1889 .read = thinkpad_acpi_driver_read,
1890 };
1891
1892 /*************************************************************************
1893 * Hotkey subdriver
1894 */
1895
1896 /*
1897 * ThinkPad firmware event model
1898 *
1899 * The ThinkPad firmware has two main event interfaces: normal ACPI
1900 * notifications (which follow the ACPI standard), and a private event
1901 * interface.
1902 *
1903 * The private event interface also issues events for the hotkeys. As
1904 * the driver gained features, the event handling code ended up being
1905 * built around the hotkey subdriver. This will need to be refactored
1906 * to a more formal event API eventually.
1907 *
1908 * Some "hotkeys" are actually supposed to be used as event reports,
1909 * such as "brightness has changed", "volume has changed", depending on
1910 * the ThinkPad model and how the firmware is operating.
1911 *
1912 * Unlike other classes, hotkey-class events have mask/unmask control on
1913 * non-ancient firmware. However, how it behaves changes a lot with the
1914 * firmware model and version.
1915 */
1916
1917 enum { /* hot key scan codes (derived from ACPI DSDT) */
1918 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1919 TP_ACPI_HOTKEYSCAN_FNF2,
1920 TP_ACPI_HOTKEYSCAN_FNF3,
1921 TP_ACPI_HOTKEYSCAN_FNF4,
1922 TP_ACPI_HOTKEYSCAN_FNF5,
1923 TP_ACPI_HOTKEYSCAN_FNF6,
1924 TP_ACPI_HOTKEYSCAN_FNF7,
1925 TP_ACPI_HOTKEYSCAN_FNF8,
1926 TP_ACPI_HOTKEYSCAN_FNF9,
1927 TP_ACPI_HOTKEYSCAN_FNF10,
1928 TP_ACPI_HOTKEYSCAN_FNF11,
1929 TP_ACPI_HOTKEYSCAN_FNF12,
1930 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1931 TP_ACPI_HOTKEYSCAN_FNINSERT,
1932 TP_ACPI_HOTKEYSCAN_FNDELETE,
1933 TP_ACPI_HOTKEYSCAN_FNHOME,
1934 TP_ACPI_HOTKEYSCAN_FNEND,
1935 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1936 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1937 TP_ACPI_HOTKEYSCAN_FNSPACE,
1938 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1939 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1940 TP_ACPI_HOTKEYSCAN_MUTE,
1941 TP_ACPI_HOTKEYSCAN_THINKPAD,
1942 };
1943
1944 enum { /* Keys/events available through NVRAM polling */
1945 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1946 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1947 };
1948
1949 enum { /* Positions of some of the keys in hotkey masks */
1950 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1951 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1952 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1953 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1954 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1955 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1956 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1957 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1958 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1959 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1960 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1961 };
1962
1963 enum { /* NVRAM to ACPI HKEY group map */
1964 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1965 TP_ACPI_HKEY_ZOOM_MASK |
1966 TP_ACPI_HKEY_DISPSWTCH_MASK |
1967 TP_ACPI_HKEY_HIBERNATE_MASK,
1968 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1969 TP_ACPI_HKEY_BRGHTDWN_MASK,
1970 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1971 TP_ACPI_HKEY_VOLDWN_MASK |
1972 TP_ACPI_HKEY_MUTE_MASK,
1973 };
1974
1975 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1976 struct tp_nvram_state {
1977 u16 thinkpad_toggle:1;
1978 u16 zoom_toggle:1;
1979 u16 display_toggle:1;
1980 u16 thinklight_toggle:1;
1981 u16 hibernate_toggle:1;
1982 u16 displayexp_toggle:1;
1983 u16 display_state:1;
1984 u16 brightness_toggle:1;
1985 u16 volume_toggle:1;
1986 u16 mute:1;
1987
1988 u8 brightness_level;
1989 u8 volume_level;
1990 };
1991
1992 /* kthread for the hotkey poller */
1993 static struct task_struct *tpacpi_hotkey_task;
1994
1995 /* Acquired while the poller kthread is running, use to sync start/stop */
1996 static struct mutex hotkey_thread_mutex;
1997
1998 /*
1999 * Acquire mutex to write poller control variables as an
2000 * atomic block.
2001 *
2002 * Increment hotkey_config_change when changing them if you
2003 * want the kthread to forget old state.
2004 *
2005 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2006 */
2007 static struct mutex hotkey_thread_data_mutex;
2008 static unsigned int hotkey_config_change;
2009
2010 /*
2011 * hotkey poller control variables
2012 *
2013 * Must be atomic or readers will also need to acquire mutex
2014 *
2015 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2016 * should be used only when the changes need to be taken as
2017 * a block, OR when one needs to force the kthread to forget
2018 * old state.
2019 */
2020 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
2021 static unsigned int hotkey_poll_freq = 10; /* Hz */
2022
2023 #define HOTKEY_CONFIG_CRITICAL_START \
2024 do { \
2025 mutex_lock(&hotkey_thread_data_mutex); \
2026 hotkey_config_change++; \
2027 } while (0);
2028 #define HOTKEY_CONFIG_CRITICAL_END \
2029 mutex_unlock(&hotkey_thread_data_mutex);
2030
2031 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2032
2033 #define hotkey_source_mask 0U
2034 #define HOTKEY_CONFIG_CRITICAL_START
2035 #define HOTKEY_CONFIG_CRITICAL_END
2036
2037 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2038
2039 static struct mutex hotkey_mutex;
2040
2041 static enum { /* Reasons for waking up */
2042 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
2043 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
2044 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
2045 } hotkey_wakeup_reason;
2046
2047 static int hotkey_autosleep_ack;
2048
2049 static u32 hotkey_orig_mask; /* events the BIOS had enabled */
2050 static u32 hotkey_all_mask; /* all events supported in fw */
2051 static u32 hotkey_reserved_mask; /* events better left disabled */
2052 static u32 hotkey_driver_mask; /* events needed by the driver */
2053 static u32 hotkey_user_mask; /* events visible to userspace */
2054 static u32 hotkey_acpi_mask; /* events enabled in firmware */
2055
2056 static unsigned int hotkey_report_mode;
2057
2058 static u16 *hotkey_keycode_map;
2059
2060 static struct attribute_set *hotkey_dev_attributes;
2061
2062 static void tpacpi_driver_event(const unsigned int hkey_event);
2063 static void hotkey_driver_event(const unsigned int scancode);
2064
2065 /* HKEY.MHKG() return bits */
2066 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2067
2068 static int hotkey_get_wlsw(void)
2069 {
2070 int status;
2071
2072 if (!tp_features.hotkey_wlsw)
2073 return -ENODEV;
2074
2075 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2076 if (dbg_wlswemul)
2077 return (tpacpi_wlsw_emulstate) ?
2078 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2079 #endif
2080
2081 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2082 return -EIO;
2083
2084 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2085 }
2086
2087 static int hotkey_get_tablet_mode(int *status)
2088 {
2089 int s;
2090
2091 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2092 return -EIO;
2093
2094 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2095 return 0;
2096 }
2097
2098 /*
2099 * Reads current event mask from firmware, and updates
2100 * hotkey_acpi_mask accordingly. Also resets any bits
2101 * from hotkey_user_mask that are unavailable to be
2102 * delivered (shadow requirement of the userspace ABI).
2103 *
2104 * Call with hotkey_mutex held
2105 */
2106 static int hotkey_mask_get(void)
2107 {
2108 if (tp_features.hotkey_mask) {
2109 u32 m = 0;
2110
2111 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2112 return -EIO;
2113
2114 hotkey_acpi_mask = m;
2115 } else {
2116 /* no mask support doesn't mean no event support... */
2117 hotkey_acpi_mask = hotkey_all_mask;
2118 }
2119
2120 /* sync userspace-visible mask */
2121 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2122
2123 return 0;
2124 }
2125
2126 void static hotkey_mask_warn_incomplete_mask(void)
2127 {
2128 /* log only what the user can fix... */
2129 const u32 wantedmask = hotkey_driver_mask &
2130 ~(hotkey_acpi_mask | hotkey_source_mask) &
2131 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2132
2133 if (wantedmask)
2134 printk(TPACPI_NOTICE
2135 "required events 0x%08x not enabled!\n",
2136 wantedmask);
2137 }
2138
2139 /*
2140 * Set the firmware mask when supported
2141 *
2142 * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2143 *
2144 * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2145 *
2146 * Call with hotkey_mutex held
2147 */
2148 static int hotkey_mask_set(u32 mask)
2149 {
2150 int i;
2151 int rc = 0;
2152
2153 const u32 fwmask = mask & ~hotkey_source_mask;
2154
2155 if (tp_features.hotkey_mask) {
2156 for (i = 0; i < 32; i++) {
2157 if (!acpi_evalf(hkey_handle,
2158 NULL, "MHKM", "vdd", i + 1,
2159 !!(mask & (1 << i)))) {
2160 rc = -EIO;
2161 break;
2162 }
2163 }
2164 }
2165
2166 /*
2167 * We *must* make an inconditional call to hotkey_mask_get to
2168 * refresh hotkey_acpi_mask and update hotkey_user_mask
2169 *
2170 * Take the opportunity to also log when we cannot _enable_
2171 * a given event.
2172 */
2173 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2174 printk(TPACPI_NOTICE
2175 "asked for hotkey mask 0x%08x, but "
2176 "firmware forced it to 0x%08x\n",
2177 fwmask, hotkey_acpi_mask);
2178 }
2179
2180 hotkey_mask_warn_incomplete_mask();
2181
2182 return rc;
2183 }
2184
2185 /*
2186 * Sets hotkey_user_mask and tries to set the firmware mask
2187 *
2188 * Call with hotkey_mutex held
2189 */
2190 static int hotkey_user_mask_set(const u32 mask)
2191 {
2192 int rc;
2193
2194 /* Give people a chance to notice they are doing something that
2195 * is bound to go boom on their users sooner or later */
2196 if (!tp_warned.hotkey_mask_ff &&
2197 (mask == 0xffff || mask == 0xffffff ||
2198 mask == 0xffffffff)) {
2199 tp_warned.hotkey_mask_ff = 1;
2200 printk(TPACPI_NOTICE
2201 "setting the hotkey mask to 0x%08x is likely "
2202 "not the best way to go about it\n", mask);
2203 printk(TPACPI_NOTICE
2204 "please consider using the driver defaults, "
2205 "and refer to up-to-date thinkpad-acpi "
2206 "documentation\n");
2207 }
2208
2209 /* Try to enable what the user asked for, plus whatever we need.
2210 * this syncs everything but won't enable bits in hotkey_user_mask */
2211 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2212
2213 /* Enable the available bits in hotkey_user_mask */
2214 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2215
2216 return rc;
2217 }
2218
2219 /*
2220 * Sets the driver hotkey mask.
2221 *
2222 * Can be called even if the hotkey subdriver is inactive
2223 */
2224 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2225 {
2226 int rc;
2227
2228 /* Do the right thing if hotkey_init has not been called yet */
2229 if (!tp_features.hotkey) {
2230 hotkey_driver_mask = mask;
2231 return 0;
2232 }
2233
2234 mutex_lock(&hotkey_mutex);
2235
2236 HOTKEY_CONFIG_CRITICAL_START
2237 hotkey_driver_mask = mask;
2238 hotkey_source_mask |= (mask & ~hotkey_all_mask);
2239 HOTKEY_CONFIG_CRITICAL_END
2240
2241 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2242 ~hotkey_source_mask);
2243 mutex_unlock(&hotkey_mutex);
2244
2245 return rc;
2246 }
2247
2248 static int hotkey_status_get(int *status)
2249 {
2250 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2251 return -EIO;
2252
2253 return 0;
2254 }
2255
2256 static int hotkey_status_set(bool enable)
2257 {
2258 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2259 return -EIO;
2260
2261 return 0;
2262 }
2263
2264 static void tpacpi_input_send_tabletsw(void)
2265 {
2266 int state;
2267
2268 if (tp_features.hotkey_tablet &&
2269 !hotkey_get_tablet_mode(&state)) {
2270 mutex_lock(&tpacpi_inputdev_send_mutex);
2271
2272 input_report_switch(tpacpi_inputdev,
2273 SW_TABLET_MODE, !!state);
2274 input_sync(tpacpi_inputdev);
2275
2276 mutex_unlock(&tpacpi_inputdev_send_mutex);
2277 }
2278 }
2279
2280 /* Do NOT call without validating scancode first */
2281 static void tpacpi_input_send_key(const unsigned int scancode)
2282 {
2283 const unsigned int keycode = hotkey_keycode_map[scancode];
2284
2285 if (keycode != KEY_RESERVED) {
2286 mutex_lock(&tpacpi_inputdev_send_mutex);
2287
2288 input_report_key(tpacpi_inputdev, keycode, 1);
2289 if (keycode == KEY_UNKNOWN)
2290 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2291 scancode);
2292 input_sync(tpacpi_inputdev);
2293
2294 input_report_key(tpacpi_inputdev, keycode, 0);
2295 if (keycode == KEY_UNKNOWN)
2296 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2297 scancode);
2298 input_sync(tpacpi_inputdev);
2299
2300 mutex_unlock(&tpacpi_inputdev_send_mutex);
2301 }
2302 }
2303
2304 /* Do NOT call without validating scancode first */
2305 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2306 {
2307 hotkey_driver_event(scancode);
2308 if (hotkey_user_mask & (1 << scancode))
2309 tpacpi_input_send_key(scancode);
2310 }
2311
2312 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2313 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2314
2315 /* Do NOT call without validating scancode first */
2316 static void tpacpi_hotkey_send_key(unsigned int scancode)
2317 {
2318 tpacpi_input_send_key_masked(scancode);
2319 if (hotkey_report_mode < 2) {
2320 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2321 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2322 }
2323 }
2324
2325 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2326 {
2327 u8 d;
2328
2329 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2330 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2331 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2332 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2333 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2334 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2335 }
2336 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2337 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2338 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2339 }
2340 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2341 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2342 n->displayexp_toggle =
2343 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2344 }
2345 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2346 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2347 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2348 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2349 n->brightness_toggle =
2350 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2351 }
2352 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2353 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2354 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2355 >> TP_NVRAM_POS_LEVEL_VOLUME;
2356 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2357 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2358 }
2359 }
2360
2361 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2362 struct tp_nvram_state *newn,
2363 const u32 event_mask)
2364 {
2365
2366 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2367 do { \
2368 if ((event_mask & (1 << __scancode)) && \
2369 oldn->__member != newn->__member) \
2370 tpacpi_hotkey_send_key(__scancode); \
2371 } while (0)
2372
2373 #define TPACPI_MAY_SEND_KEY(__scancode) \
2374 do { \
2375 if (event_mask & (1 << __scancode)) \
2376 tpacpi_hotkey_send_key(__scancode); \
2377 } while (0)
2378
2379 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2380 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2381 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2382 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2383
2384 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2385
2386 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2387
2388 /* handle volume */
2389 if (oldn->volume_toggle != newn->volume_toggle) {
2390 if (oldn->mute != newn->mute) {
2391 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2392 }
2393 if (oldn->volume_level > newn->volume_level) {
2394 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2395 } else if (oldn->volume_level < newn->volume_level) {
2396 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2397 } else if (oldn->mute == newn->mute) {
2398 /* repeated key presses that didn't change state */
2399 if (newn->mute) {
2400 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2401 } else if (newn->volume_level != 0) {
2402 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2403 } else {
2404 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2405 }
2406 }
2407 }
2408
2409 /* handle brightness */
2410 if (oldn->brightness_toggle != newn->brightness_toggle) {
2411 if (oldn->brightness_level < newn->brightness_level) {
2412 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2413 } else if (oldn->brightness_level > newn->brightness_level) {
2414 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2415 } else {
2416 /* repeated key presses that didn't change state */
2417 if (newn->brightness_level != 0) {
2418 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2419 } else {
2420 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2421 }
2422 }
2423 }
2424
2425 #undef TPACPI_COMPARE_KEY
2426 #undef TPACPI_MAY_SEND_KEY
2427 }
2428
2429 /*
2430 * Polling driver
2431 *
2432 * We track all events in hotkey_source_mask all the time, since
2433 * most of them are edge-based. We only issue those requested by
2434 * hotkey_user_mask or hotkey_driver_mask, though.
2435 */
2436 static int hotkey_kthread(void *data)
2437 {
2438 struct tp_nvram_state s[2];
2439 u32 poll_mask, event_mask;
2440 unsigned int si, so;
2441 unsigned long t;
2442 unsigned int change_detector, must_reset;
2443 unsigned int poll_freq;
2444
2445 mutex_lock(&hotkey_thread_mutex);
2446
2447 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2448 goto exit;
2449
2450 set_freezable();
2451
2452 so = 0;
2453 si = 1;
2454 t = 0;
2455
2456 /* Initial state for compares */
2457 mutex_lock(&hotkey_thread_data_mutex);
2458 change_detector = hotkey_config_change;
2459 poll_mask = hotkey_source_mask;
2460 event_mask = hotkey_source_mask &
2461 (hotkey_driver_mask | hotkey_user_mask);
2462 poll_freq = hotkey_poll_freq;
2463 mutex_unlock(&hotkey_thread_data_mutex);
2464 hotkey_read_nvram(&s[so], poll_mask);
2465
2466 while (!kthread_should_stop()) {
2467 if (t == 0) {
2468 if (likely(poll_freq))
2469 t = 1000/poll_freq;
2470 else
2471 t = 100; /* should never happen... */
2472 }
2473 t = msleep_interruptible(t);
2474 if (unlikely(kthread_should_stop()))
2475 break;
2476 must_reset = try_to_freeze();
2477 if (t > 0 && !must_reset)
2478 continue;
2479
2480 mutex_lock(&hotkey_thread_data_mutex);
2481 if (must_reset || hotkey_config_change != change_detector) {
2482 /* forget old state on thaw or config change */
2483 si = so;
2484 t = 0;
2485 change_detector = hotkey_config_change;
2486 }
2487 poll_mask = hotkey_source_mask;
2488 event_mask = hotkey_source_mask &
2489 (hotkey_driver_mask | hotkey_user_mask);
2490 poll_freq = hotkey_poll_freq;
2491 mutex_unlock(&hotkey_thread_data_mutex);
2492
2493 if (likely(poll_mask)) {
2494 hotkey_read_nvram(&s[si], poll_mask);
2495 if (likely(si != so)) {
2496 hotkey_compare_and_issue_event(&s[so], &s[si],
2497 event_mask);
2498 }
2499 }
2500
2501 so = si;
2502 si ^= 1;
2503 }
2504
2505 exit:
2506 mutex_unlock(&hotkey_thread_mutex);
2507 return 0;
2508 }
2509
2510 /* call with hotkey_mutex held */
2511 static void hotkey_poll_stop_sync(void)
2512 {
2513 if (tpacpi_hotkey_task) {
2514 if (frozen(tpacpi_hotkey_task) ||
2515 freezing(tpacpi_hotkey_task))
2516 thaw_process(tpacpi_hotkey_task);
2517
2518 kthread_stop(tpacpi_hotkey_task);
2519 tpacpi_hotkey_task = NULL;
2520 mutex_lock(&hotkey_thread_mutex);
2521 /* at this point, the thread did exit */
2522 mutex_unlock(&hotkey_thread_mutex);
2523 }
2524 }
2525
2526 /* call with hotkey_mutex held */
2527 static void hotkey_poll_setup(bool may_warn)
2528 {
2529 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2530 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2531
2532 if (hotkey_poll_freq > 0 &&
2533 (poll_driver_mask ||
2534 (poll_user_mask && tpacpi_inputdev->users > 0))) {
2535 if (!tpacpi_hotkey_task) {
2536 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2537 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2538 if (IS_ERR(tpacpi_hotkey_task)) {
2539 tpacpi_hotkey_task = NULL;
2540 printk(TPACPI_ERR
2541 "could not create kernel thread "
2542 "for hotkey polling\n");
2543 }
2544 }
2545 } else {
2546 hotkey_poll_stop_sync();
2547 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2548 hotkey_poll_freq == 0) {
2549 printk(TPACPI_NOTICE
2550 "hot keys 0x%08x and/or events 0x%08x "
2551 "require polling, which is currently "
2552 "disabled\n",
2553 poll_user_mask, poll_driver_mask);
2554 }
2555 }
2556 }
2557
2558 static void hotkey_poll_setup_safe(bool may_warn)
2559 {
2560 mutex_lock(&hotkey_mutex);
2561 hotkey_poll_setup(may_warn);
2562 mutex_unlock(&hotkey_mutex);
2563 }
2564
2565 /* call with hotkey_mutex held */
2566 static void hotkey_poll_set_freq(unsigned int freq)
2567 {
2568 if (!freq)
2569 hotkey_poll_stop_sync();
2570
2571 hotkey_poll_freq = freq;
2572 }
2573
2574 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2575
2576 static void hotkey_poll_setup_safe(bool __unused)
2577 {
2578 }
2579
2580 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2581
2582 static int hotkey_inputdev_open(struct input_dev *dev)
2583 {
2584 switch (tpacpi_lifecycle) {
2585 case TPACPI_LIFE_INIT:
2586 /*
2587 * hotkey_init will call hotkey_poll_setup_safe
2588 * at the appropriate moment
2589 */
2590 return 0;
2591 case TPACPI_LIFE_EXITING:
2592 return -EBUSY;
2593 case TPACPI_LIFE_RUNNING:
2594 hotkey_poll_setup_safe(false);
2595 return 0;
2596 }
2597
2598 /* Should only happen if tpacpi_lifecycle is corrupt */
2599 BUG();
2600 return -EBUSY;
2601 }
2602
2603 static void hotkey_inputdev_close(struct input_dev *dev)
2604 {
2605 /* disable hotkey polling when possible */
2606 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2607 !(hotkey_source_mask & hotkey_driver_mask))
2608 hotkey_poll_setup_safe(false);
2609 }
2610
2611 /* sysfs hotkey enable ------------------------------------------------- */
2612 static ssize_t hotkey_enable_show(struct device *dev,
2613 struct device_attribute *attr,
2614 char *buf)
2615 {
2616 int res, status;
2617
2618 printk_deprecated_attribute("hotkey_enable",
2619 "Hotkey reporting is always enabled");
2620
2621 res = hotkey_status_get(&status);
2622 if (res)
2623 return res;
2624
2625 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2626 }
2627
2628 static ssize_t hotkey_enable_store(struct device *dev,
2629 struct device_attribute *attr,
2630 const char *buf, size_t count)
2631 {
2632 unsigned long t;
2633
2634 printk_deprecated_attribute("hotkey_enable",
2635 "Hotkeys can be disabled through hotkey_mask");
2636
2637 if (parse_strtoul(buf, 1, &t))
2638 return -EINVAL;
2639
2640 if (t == 0)
2641 return -EPERM;
2642
2643 return count;
2644 }
2645
2646 static struct device_attribute dev_attr_hotkey_enable =
2647 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2648 hotkey_enable_show, hotkey_enable_store);
2649
2650 /* sysfs hotkey mask --------------------------------------------------- */
2651 static ssize_t hotkey_mask_show(struct device *dev,
2652 struct device_attribute *attr,
2653 char *buf)
2654 {
2655 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2656 }
2657
2658 static ssize_t hotkey_mask_store(struct device *dev,
2659 struct device_attribute *attr,
2660 const char *buf, size_t count)
2661 {
2662 unsigned long t;
2663 int res;
2664
2665 if (parse_strtoul(buf, 0xffffffffUL, &t))
2666 return -EINVAL;
2667
2668 if (mutex_lock_killable(&hotkey_mutex))
2669 return -ERESTARTSYS;
2670
2671 res = hotkey_user_mask_set(t);
2672
2673 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2674 hotkey_poll_setup(true);
2675 #endif
2676
2677 mutex_unlock(&hotkey_mutex);
2678
2679 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2680
2681 return (res) ? res : count;
2682 }
2683
2684 static struct device_attribute dev_attr_hotkey_mask =
2685 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2686 hotkey_mask_show, hotkey_mask_store);
2687
2688 /* sysfs hotkey bios_enabled ------------------------------------------- */
2689 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2690 struct device_attribute *attr,
2691 char *buf)
2692 {
2693 return sprintf(buf, "0\n");
2694 }
2695
2696 static struct device_attribute dev_attr_hotkey_bios_enabled =
2697 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2698
2699 /* sysfs hotkey bios_mask ---------------------------------------------- */
2700 static ssize_t hotkey_bios_mask_show(struct device *dev,
2701 struct device_attribute *attr,
2702 char *buf)
2703 {
2704 printk_deprecated_attribute("hotkey_bios_mask",
2705 "This attribute is useless.");
2706 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2707 }
2708
2709 static struct device_attribute dev_attr_hotkey_bios_mask =
2710 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2711
2712 /* sysfs hotkey all_mask ----------------------------------------------- */
2713 static ssize_t hotkey_all_mask_show(struct device *dev,
2714 struct device_attribute *attr,
2715 char *buf)
2716 {
2717 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2718 hotkey_all_mask | hotkey_source_mask);
2719 }
2720
2721 static struct device_attribute dev_attr_hotkey_all_mask =
2722 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2723
2724 /* sysfs hotkey recommended_mask --------------------------------------- */
2725 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2726 struct device_attribute *attr,
2727 char *buf)
2728 {
2729 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2730 (hotkey_all_mask | hotkey_source_mask)
2731 & ~hotkey_reserved_mask);
2732 }
2733
2734 static struct device_attribute dev_attr_hotkey_recommended_mask =
2735 __ATTR(hotkey_recommended_mask, S_IRUGO,
2736 hotkey_recommended_mask_show, NULL);
2737
2738 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2739
2740 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2741 static ssize_t hotkey_source_mask_show(struct device *dev,
2742 struct device_attribute *attr,
2743 char *buf)
2744 {
2745 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2746 }
2747
2748 static ssize_t hotkey_source_mask_store(struct device *dev,
2749 struct device_attribute *attr,
2750 const char *buf, size_t count)
2751 {
2752 unsigned long t;
2753 u32 r_ev;
2754 int rc;
2755
2756 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2757 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2758 return -EINVAL;
2759
2760 if (mutex_lock_killable(&hotkey_mutex))
2761 return -ERESTARTSYS;
2762
2763 HOTKEY_CONFIG_CRITICAL_START
2764 hotkey_source_mask = t;
2765 HOTKEY_CONFIG_CRITICAL_END
2766
2767 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2768 ~hotkey_source_mask);
2769 hotkey_poll_setup(true);
2770
2771 /* check if events needed by the driver got disabled */
2772 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2773 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2774
2775 mutex_unlock(&hotkey_mutex);
2776
2777 if (rc < 0)
2778 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2779 "firmware event mask!\n");
2780
2781 if (r_ev)
2782 printk(TPACPI_NOTICE "hotkey_source_mask: "
2783 "some important events were disabled: "
2784 "0x%04x\n", r_ev);
2785
2786 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2787
2788 return (rc < 0) ? rc : count;
2789 }
2790
2791 static struct device_attribute dev_attr_hotkey_source_mask =
2792 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2793 hotkey_source_mask_show, hotkey_source_mask_store);
2794
2795 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2796 static ssize_t hotkey_poll_freq_show(struct device *dev,
2797 struct device_attribute *attr,
2798 char *buf)
2799 {
2800 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2801 }
2802
2803 static ssize_t hotkey_poll_freq_store(struct device *dev,
2804 struct device_attribute *attr,
2805 const char *buf, size_t count)
2806 {
2807 unsigned long t;
2808
2809 if (parse_strtoul(buf, 25, &t))
2810 return -EINVAL;
2811
2812 if (mutex_lock_killable(&hotkey_mutex))
2813 return -ERESTARTSYS;
2814
2815 hotkey_poll_set_freq(t);
2816 hotkey_poll_setup(true);
2817
2818 mutex_unlock(&hotkey_mutex);
2819
2820 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2821
2822 return count;
2823 }
2824
2825 static struct device_attribute dev_attr_hotkey_poll_freq =
2826 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2827 hotkey_poll_freq_show, hotkey_poll_freq_store);
2828
2829 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2830
2831 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2832 static ssize_t hotkey_radio_sw_show(struct device *dev,
2833 struct device_attribute *attr,
2834 char *buf)
2835 {
2836 int res;
2837 res = hotkey_get_wlsw();
2838 if (res < 0)
2839 return res;
2840
2841 /* Opportunistic update */
2842 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2843
2844 return snprintf(buf, PAGE_SIZE, "%d\n",
2845 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2846 }
2847
2848 static struct device_attribute dev_attr_hotkey_radio_sw =
2849 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2850
2851 static void hotkey_radio_sw_notify_change(void)
2852 {
2853 if (tp_features.hotkey_wlsw)
2854 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2855 "hotkey_radio_sw");
2856 }
2857
2858 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2859 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2860 struct device_attribute *attr,
2861 char *buf)
2862 {
2863 int res, s;
2864 res = hotkey_get_tablet_mode(&s);
2865 if (res < 0)
2866 return res;
2867
2868 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2869 }
2870
2871 static struct device_attribute dev_attr_hotkey_tablet_mode =
2872 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2873
2874 static void hotkey_tablet_mode_notify_change(void)
2875 {
2876 if (tp_features.hotkey_tablet)
2877 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2878 "hotkey_tablet_mode");
2879 }
2880
2881 /* sysfs hotkey report_mode -------------------------------------------- */
2882 static ssize_t hotkey_report_mode_show(struct device *dev,
2883 struct device_attribute *attr,
2884 char *buf)
2885 {
2886 return snprintf(buf, PAGE_SIZE, "%d\n",
2887 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2888 }
2889
2890 static struct device_attribute dev_attr_hotkey_report_mode =
2891 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2892
2893 /* sysfs wakeup reason (pollable) -------------------------------------- */
2894 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2895 struct device_attribute *attr,
2896 char *buf)
2897 {
2898 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2899 }
2900
2901 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2902 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2903
2904 static void hotkey_wakeup_reason_notify_change(void)
2905 {
2906 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2907 "wakeup_reason");
2908 }
2909
2910 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2911 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2912 struct device_attribute *attr,
2913 char *buf)
2914 {
2915 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2916 }
2917
2918 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2919 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2920 hotkey_wakeup_hotunplug_complete_show, NULL);
2921
2922 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2923 {
2924 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2925 "wakeup_hotunplug_complete");
2926 }
2927
2928 /* --------------------------------------------------------------------- */
2929
2930 static struct attribute *hotkey_attributes[] __initdata = {
2931 &dev_attr_hotkey_enable.attr,
2932 &dev_attr_hotkey_bios_enabled.attr,
2933 &dev_attr_hotkey_bios_mask.attr,
2934 &dev_attr_hotkey_report_mode.attr,
2935 &dev_attr_hotkey_wakeup_reason.attr,
2936 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2937 &dev_attr_hotkey_mask.attr,
2938 &dev_attr_hotkey_all_mask.attr,
2939 &dev_attr_hotkey_recommended_mask.attr,
2940 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2941 &dev_attr_hotkey_source_mask.attr,
2942 &dev_attr_hotkey_poll_freq.attr,
2943 #endif
2944 };
2945
2946 /*
2947 * Sync both the hw and sw blocking state of all switches
2948 */
2949 static void tpacpi_send_radiosw_update(void)
2950 {
2951 int wlsw;
2952
2953 /*
2954 * We must sync all rfkill controllers *before* issuing any
2955 * rfkill input events, or we will race the rfkill core input
2956 * handler.
2957 *
2958 * tpacpi_inputdev_send_mutex works as a syncronization point
2959 * for the above.
2960 *
2961 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2962 */
2963
2964 wlsw = hotkey_get_wlsw();
2965
2966 /* Sync hw blocking state first if it is hw-blocked */
2967 if (wlsw == TPACPI_RFK_RADIO_OFF)
2968 tpacpi_rfk_update_hwblock_state(true);
2969
2970 /* Sync sw blocking state */
2971 tpacpi_rfk_update_swstate_all();
2972
2973 /* Sync hw blocking state last if it is hw-unblocked */
2974 if (wlsw == TPACPI_RFK_RADIO_ON)
2975 tpacpi_rfk_update_hwblock_state(false);
2976
2977 /* Issue rfkill input event for WLSW switch */
2978 if (!(wlsw < 0)) {
2979 mutex_lock(&tpacpi_inputdev_send_mutex);
2980
2981 input_report_switch(tpacpi_inputdev,
2982 SW_RFKILL_ALL, (wlsw > 0));
2983 input_sync(tpacpi_inputdev);
2984
2985 mutex_unlock(&tpacpi_inputdev_send_mutex);
2986 }
2987
2988 /*
2989 * this can be unconditional, as we will poll state again
2990 * if userspace uses the notify to read data
2991 */
2992 hotkey_radio_sw_notify_change();
2993 }
2994
2995 static void hotkey_exit(void)
2996 {
2997 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2998 mutex_lock(&hotkey_mutex);
2999 hotkey_poll_stop_sync();
3000 mutex_unlock(&hotkey_mutex);
3001 #endif
3002
3003 if (hotkey_dev_attributes)
3004 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3005
3006 kfree(hotkey_keycode_map);
3007
3008 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3009 "restoring original HKEY status and mask\n");
3010 /* yes, there is a bitwise or below, we want the
3011 * functions to be called even if one of them fail */
3012 if (((tp_features.hotkey_mask &&
3013 hotkey_mask_set(hotkey_orig_mask)) |
3014 hotkey_status_set(false)) != 0)
3015 printk(TPACPI_ERR
3016 "failed to restore hot key mask "
3017 "to BIOS defaults\n");
3018 }
3019
3020 static void __init hotkey_unmap(const unsigned int scancode)
3021 {
3022 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3023 clear_bit(hotkey_keycode_map[scancode],
3024 tpacpi_inputdev->keybit);
3025 hotkey_keycode_map[scancode] = KEY_RESERVED;
3026 }
3027 }
3028
3029 /*
3030 * HKEY quirks:
3031 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12
3032 */
3033
3034 #define TPACPI_HK_Q_INIMASK 0x0001
3035
3036 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3037 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3038 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3039 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3040 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3041 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3042 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3043 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3044 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3045 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3046 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3047 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3048 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3049 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3050 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3051 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3052 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3053 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3054 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3055 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3056 };
3057
3058 static int __init hotkey_init(struct ibm_init_struct *iibm)
3059 {
3060 /* Requirements for changing the default keymaps:
3061 *
3062 * 1. Many of the keys are mapped to KEY_RESERVED for very
3063 * good reasons. Do not change them unless you have deep
3064 * knowledge on the IBM and Lenovo ThinkPad firmware for
3065 * the various ThinkPad models. The driver behaves
3066 * differently for KEY_RESERVED: such keys have their
3067 * hot key mask *unset* in mask_recommended, and also
3068 * in the initial hot key mask programmed into the
3069 * firmware at driver load time, which means the firm-
3070 * ware may react very differently if you change them to
3071 * something else;
3072 *
3073 * 2. You must be subscribed to the linux-thinkpad and
3074 * ibm-acpi-devel mailing lists, and you should read the
3075 * list archives since 2007 if you want to change the
3076 * keymaps. This requirement exists so that you will
3077 * know the past history of problems with the thinkpad-
3078 * acpi driver keymaps, and also that you will be
3079 * listening to any bug reports;
3080 *
3081 * 3. Do not send thinkpad-acpi specific patches directly to
3082 * for merging, *ever*. Send them to the linux-acpi
3083 * mailinglist for comments. Merging is to be done only
3084 * through acpi-test and the ACPI maintainer.
3085 *
3086 * If the above is too much to ask, don't change the keymap.
3087 * Ask the thinkpad-acpi maintainer to do it, instead.
3088 */
3089 static u16 ibm_keycode_map[] __initdata = {
3090 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3091 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
3092 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3093 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3094
3095 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3096 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3097 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3098 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3099
3100 /* brightness: firmware always reacts to them */
3101 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
3102 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
3103
3104 /* Thinklight: firmware always react to it */
3105 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3106
3107 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3108 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3109
3110 /* Volume: firmware always react to it and reprograms
3111 * the built-in *extra* mixer. Never map it to control
3112 * another mixer by default. */
3113 KEY_RESERVED, /* 0x14: VOLUME UP */
3114 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3115 KEY_RESERVED, /* 0x16: MUTE */
3116
3117 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3118
3119 /* (assignments unknown, please report if found) */
3120 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3121 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3122 };
3123 static u16 lenovo_keycode_map[] __initdata = {
3124 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3125 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
3126 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3127 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
3128
3129 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3130 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
3131 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
3132 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
3133
3134 /* These should be enabled --only-- when ACPI video
3135 * is disabled (i.e. in "vendor" mode), and are handled
3136 * in a special way by the init code */
3137 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
3138 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
3139
3140 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
3141
3142 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
3143 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
3144
3145 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3146 * react to it and reprograms the built-in *extra* mixer.
3147 * Never map it to control another mixer by default.
3148 *
3149 * T60?, T61, R60?, R61: firmware and EC tries to send
3150 * these over the regular keyboard, so these are no-ops,
3151 * but there are still weird bugs re. MUTE, so do not
3152 * change unless you get test reports from all Lenovo
3153 * models. May cause the BIOS to interfere with the
3154 * HDA mixer.
3155 */
3156 KEY_RESERVED, /* 0x14: VOLUME UP */
3157 KEY_RESERVED, /* 0x15: VOLUME DOWN */
3158 KEY_RESERVED, /* 0x16: MUTE */
3159
3160 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
3161
3162 /* (assignments unknown, please report if found) */
3163 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3164 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3165 };
3166
3167 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
3168 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
3169 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
3170
3171 int res, i;
3172 int status;
3173 int hkeyv;
3174
3175 unsigned long quirks;
3176
3177 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3178 "initializing hotkey subdriver\n");
3179
3180 BUG_ON(!tpacpi_inputdev);
3181 BUG_ON(tpacpi_inputdev->open != NULL ||
3182 tpacpi_inputdev->close != NULL);
3183
3184 TPACPI_ACPIHANDLE_INIT(hkey);
3185 mutex_init(&hotkey_mutex);
3186
3187 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3188 mutex_init(&hotkey_thread_mutex);
3189 mutex_init(&hotkey_thread_data_mutex);
3190 #endif
3191
3192 /* hotkey not supported on 570 */
3193 tp_features.hotkey = hkey_handle != NULL;
3194
3195 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3196 "hotkeys are %s\n",
3197 str_supported(tp_features.hotkey));
3198
3199 if (!tp_features.hotkey)
3200 return 1;
3201
3202 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3203 ARRAY_SIZE(tpacpi_hotkey_qtable));
3204
3205 tpacpi_disable_brightness_delay();
3206
3207 /* MUST have enough space for all attributes to be added to
3208 * hotkey_dev_attributes */
3209 hotkey_dev_attributes = create_attr_set(
3210 ARRAY_SIZE(hotkey_attributes) + 2,
3211 NULL);
3212 if (!hotkey_dev_attributes)
3213 return -ENOMEM;
3214 res = add_many_to_attr_set(hotkey_dev_attributes,
3215 hotkey_attributes,
3216 ARRAY_SIZE(hotkey_attributes));
3217 if (res)
3218 goto err_exit;
3219
3220 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3221 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3222 for HKEY interface version 0x100 */
3223 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3224 if ((hkeyv >> 8) != 1) {
3225 printk(TPACPI_ERR "unknown version of the "
3226 "HKEY interface: 0x%x\n", hkeyv);
3227 printk(TPACPI_ERR "please report this to %s\n",
3228 TPACPI_MAIL);
3229 } else {
3230 /*
3231 * MHKV 0x100 in A31, R40, R40e,
3232 * T4x, X31, and later
3233 */
3234 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3235 "firmware HKEY interface version: 0x%x\n",
3236 hkeyv);
3237
3238 /* Paranoia check AND init hotkey_all_mask */
3239 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3240 "MHKA", "qd")) {
3241 printk(TPACPI_ERR
3242 "missing MHKA handler, "
3243 "please report this to %s\n",
3244 TPACPI_MAIL);
3245 /* Fallback: pre-init for FN+F3,F4,F12 */
3246 hotkey_all_mask = 0x080cU;
3247 } else {
3248 tp_features.hotkey_mask = 1;
3249 }
3250 }
3251 }
3252
3253 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3254 "hotkey masks are %s\n",
3255 str_supported(tp_features.hotkey_mask));
3256
3257 /* Init hotkey_all_mask if not initialized yet */
3258 if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3259 (quirks & TPACPI_HK_Q_INIMASK))
3260 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
3261
3262 /* Init hotkey_acpi_mask and hotkey_orig_mask */
3263 if (tp_features.hotkey_mask) {
3264 /* hotkey_source_mask *must* be zero for
3265 * the first hotkey_mask_get to return hotkey_orig_mask */
3266 res = hotkey_mask_get();
3267 if (res)
3268 goto err_exit;
3269
3270 hotkey_orig_mask = hotkey_acpi_mask;
3271 } else {
3272 hotkey_orig_mask = hotkey_all_mask;
3273 hotkey_acpi_mask = hotkey_all_mask;
3274 }
3275
3276 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3277 if (dbg_wlswemul) {
3278 tp_features.hotkey_wlsw = 1;
3279 printk(TPACPI_INFO
3280 "radio switch emulation enabled\n");
3281 } else
3282 #endif
3283 /* Not all thinkpads have a hardware radio switch */
3284 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3285 tp_features.hotkey_wlsw = 1;
3286 printk(TPACPI_INFO
3287 "radio switch found; radios are %s\n",
3288 enabled(status, 0));
3289 }
3290 if (tp_features.hotkey_wlsw)
3291 res = add_to_attr_set(hotkey_dev_attributes,
3292 &dev_attr_hotkey_radio_sw.attr);
3293
3294 /* For X41t, X60t, X61t Tablets... */
3295 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3296 tp_features.hotkey_tablet = 1;
3297 printk(TPACPI_INFO
3298 "possible tablet mode switch found; "
3299 "ThinkPad in %s mode\n",
3300 (status & TP_HOTKEY_TABLET_MASK)?
3301 "tablet" : "laptop");
3302 res = add_to_attr_set(hotkey_dev_attributes,
3303 &dev_attr_hotkey_tablet_mode.attr);
3304 }
3305
3306 if (!res)
3307 res = register_attr_set_with_sysfs(
3308 hotkey_dev_attributes,
3309 &tpacpi_pdev->dev.kobj);
3310 if (res)
3311 goto err_exit;
3312
3313 /* Set up key map */
3314
3315 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3316 GFP_KERNEL);
3317 if (!hotkey_keycode_map) {
3318 printk(TPACPI_ERR
3319 "failed to allocate memory for key map\n");
3320 res = -ENOMEM;
3321 goto err_exit;
3322 }
3323
3324 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3325 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3326 "using Lenovo default hot key map\n");
3327 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3328 TPACPI_HOTKEY_MAP_SIZE);
3329 } else {
3330 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3331 "using IBM default hot key map\n");
3332 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3333 TPACPI_HOTKEY_MAP_SIZE);
3334 }
3335
3336 set_bit(EV_KEY, tpacpi_inputdev->evbit);
3337 set_bit(EV_MSC, tpacpi_inputdev->evbit);
3338 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3339 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3340 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3341 tpacpi_inputdev->keycode = hotkey_keycode_map;
3342 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3343 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3344 set_bit(hotkey_keycode_map[i],
3345 tpacpi_inputdev->keybit);
3346 } else {
3347 if (i < sizeof(hotkey_reserved_mask)*8)
3348 hotkey_reserved_mask |= 1 << i;
3349 }
3350 }
3351
3352 if (tp_features.hotkey_wlsw) {
3353 set_bit(EV_SW, tpacpi_inputdev->evbit);
3354 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3355 }
3356 if (tp_features.hotkey_tablet) {
3357 set_bit(EV_SW, tpacpi_inputdev->evbit);
3358 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3359 }
3360
3361 /* Do not issue duplicate brightness change events to
3362 * userspace */
3363 if (!tp_features.bright_acpimode)
3364 /* update bright_acpimode... */
3365 tpacpi_check_std_acpi_brightness_support();
3366
3367 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3368 printk(TPACPI_INFO
3369 "This ThinkPad has standard ACPI backlight "
3370 "brightness control, supported by the ACPI "
3371 "video driver\n");
3372 printk(TPACPI_NOTICE
3373 "Disabling thinkpad-acpi brightness events "
3374 "by default...\n");
3375
3376 /* Disable brightness up/down on Lenovo thinkpads when
3377 * ACPI is handling them, otherwise it is plain impossible
3378 * for userspace to do something even remotely sane */
3379 hotkey_reserved_mask |=
3380 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3381 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3382 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3383 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3384 }
3385
3386 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3387 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3388 & ~hotkey_all_mask
3389 & ~hotkey_reserved_mask;
3390
3391 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3392 "hotkey source mask 0x%08x, polling freq %u\n",
3393 hotkey_source_mask, hotkey_poll_freq);
3394 #endif
3395
3396 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3397 "enabling firmware HKEY event interface...\n");
3398 res = hotkey_status_set(true);
3399 if (res) {
3400 hotkey_exit();
3401 return res;
3402 }
3403 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3404 | hotkey_driver_mask)
3405 & ~hotkey_source_mask);
3406 if (res < 0 && res != -ENXIO) {
3407 hotkey_exit();
3408 return res;
3409 }
3410 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3411 & ~hotkey_reserved_mask;
3412 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3413 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3414 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3415
3416 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3417 "legacy ibm/hotkey event reporting over procfs %s\n",
3418 (hotkey_report_mode < 2) ?
3419 "enabled" : "disabled");
3420
3421 tpacpi_inputdev->open = &hotkey_inputdev_open;
3422 tpacpi_inputdev->close = &hotkey_inputdev_close;
3423
3424 hotkey_poll_setup_safe(true);
3425 tpacpi_send_radiosw_update();
3426 tpacpi_input_send_tabletsw();
3427
3428 return 0;
3429
3430 err_exit:
3431 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3432 hotkey_dev_attributes = NULL;
3433
3434 return (res < 0)? res : 1;
3435 }
3436
3437 static bool hotkey_notify_hotkey(const u32 hkey,
3438 bool *send_acpi_ev,
3439 bool *ignore_acpi_ev)
3440 {
3441 /* 0x1000-0x1FFF: key presses */
3442 unsigned int scancode = hkey & 0xfff;
3443 *send_acpi_ev = true;
3444 *ignore_acpi_ev = false;
3445
3446 if (scancode > 0 && scancode < 0x21) {
3447 scancode--;
3448 if (!(hotkey_source_mask & (1 << scancode))) {
3449 tpacpi_input_send_key_masked(scancode);
3450 *send_acpi_ev = false;
3451 } else {
3452 *ignore_acpi_ev = true;
3453 }
3454 return true;
3455 }
3456 return false;
3457 }
3458
3459 static bool hotkey_notify_wakeup(const u32 hkey,
3460 bool *send_acpi_ev,
3461 bool *ignore_acpi_ev)
3462 {
3463 /* 0x2000-0x2FFF: Wakeup reason */
3464 *send_acpi_ev = true;
3465 *ignore_acpi_ev = false;
3466
3467 switch (hkey) {
3468 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3469 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3470 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3471 *ignore_acpi_ev = true;
3472 break;
3473
3474 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3475 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3476 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3477 *ignore_acpi_ev = true;
3478 break;
3479
3480 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3481 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3482 printk(TPACPI_ALERT
3483 "EMERGENCY WAKEUP: battery almost empty\n");
3484 /* how to auto-heal: */
3485 /* 2313: woke up from S3, go to S4/S5 */
3486 /* 2413: woke up from S4, go to S5 */
3487 break;
3488
3489 default:
3490 return false;
3491 }
3492
3493 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3494 printk(TPACPI_INFO
3495 "woke up due to a hot-unplug "
3496 "request...\n");
3497 hotkey_wakeup_reason_notify_change();
3498 }
3499 return true;
3500 }
3501
3502 static bool hotkey_notify_usrevent(const u32 hkey,
3503 bool *send_acpi_ev,
3504 bool *ignore_acpi_ev)
3505 {
3506 /* 0x5000-0x5FFF: human interface helpers */
3507 *send_acpi_ev = true;
3508 *ignore_acpi_ev = false;
3509
3510 switch (hkey) {
3511 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */
3512 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */
3513 return true;
3514
3515 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */
3516 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3517 tpacpi_input_send_tabletsw();
3518 hotkey_tablet_mode_notify_change();
3519 *send_acpi_ev = false;
3520 return true;
3521
3522 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */
3523 case TP_HKEY_EV_LID_OPEN: /* Lid opened */
3524 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */
3525 /* do not propagate these events */
3526 *ignore_acpi_ev = true;
3527 return true;
3528
3529 default:
3530 return false;
3531 }
3532 }
3533
3534 static bool hotkey_notify_thermal(const u32 hkey,
3535 bool *send_acpi_ev,
3536 bool *ignore_acpi_ev)
3537 {
3538 /* 0x6000-0x6FFF: thermal alarms */
3539 *send_acpi_ev = true;
3540 *ignore_acpi_ev = false;
3541
3542 switch (hkey) {
3543 case TP_HKEY_EV_ALARM_BAT_HOT:
3544 printk(TPACPI_CRIT
3545 "THERMAL ALARM: battery is too hot!\n");
3546 /* recommended action: warn user through gui */
3547 return true;
3548 case TP_HKEY_EV_ALARM_BAT_XHOT:
3549 printk(TPACPI_ALERT
3550 "THERMAL EMERGENCY: battery is extremely hot!\n");
3551 /* recommended action: immediate sleep/hibernate */
3552 return true;
3553 case TP_HKEY_EV_ALARM_SENSOR_HOT:
3554 printk(TPACPI_CRIT
3555 "THERMAL ALARM: "
3556 "a sensor reports something is too hot!\n");
3557 /* recommended action: warn user through gui, that */
3558 /* some internal component is too hot */
3559 return true;
3560 case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3561 printk(TPACPI_ALERT
3562 "THERMAL EMERGENCY: "
3563 "a sensor reports something is extremely hot!\n");
3564 /* recommended action: immediate sleep/hibernate */
3565 return true;
3566 case TP_HKEY_EV_THM_TABLE_CHANGED:
3567 printk(TPACPI_INFO
3568 "EC reports that Thermal Table has changed\n");
3569 /* recommended action: do nothing, we don't have
3570 * Lenovo ATM information */
3571 return true;
3572 default:
3573 printk(TPACPI_ALERT
3574 "THERMAL ALERT: unknown thermal alarm received\n");
3575 return false;
3576 }
3577 }
3578
3579 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3580 {
3581 u32 hkey;
3582 bool send_acpi_ev;
3583 bool ignore_acpi_ev;
3584 bool known_ev;
3585
3586 if (event != 0x80) {
3587 printk(TPACPI_ERR
3588 "unknown HKEY notification event %d\n", event);
3589 /* forward it to userspace, maybe it knows how to handle it */
3590 acpi_bus_generate_netlink_event(
3591 ibm->acpi->device->pnp.device_class,
3592 dev_name(&ibm->acpi->device->dev),
3593 event, 0);
3594 return;
3595 }
3596
3597 while (1) {
3598 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3599 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3600 return;
3601 }
3602
3603 if (hkey == 0) {
3604 /* queue empty */
3605 return;
3606 }
3607
3608 send_acpi_ev = true;
3609 ignore_acpi_ev = false;
3610
3611 switch (hkey >> 12) {
3612 case 1:
3613 /* 0x1000-0x1FFF: key presses */
3614 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3615 &ignore_acpi_ev);
3616 break;
3617 case 2:
3618 /* 0x2000-0x2FFF: Wakeup reason */
3619 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3620 &ignore_acpi_ev);
3621 break;
3622 case 3:
3623 /* 0x3000-0x3FFF: bay-related wakeups */
3624 if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3625 hotkey_autosleep_ack = 1;
3626 printk(TPACPI_INFO
3627 "bay ejected\n");
3628 hotkey_wakeup_hotunplug_complete_notify_change();
3629 known_ev = true;
3630 } else {
3631 known_ev = false;
3632 }
3633 break;
3634 case 4:
3635 /* 0x4000-0x4FFF: dock-related wakeups */
3636 if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3637 hotkey_autosleep_ack = 1;
3638 printk(TPACPI_INFO
3639 "undocked\n");
3640 hotkey_wakeup_hotunplug_complete_notify_change();
3641 known_ev = true;
3642 } else {
3643 known_ev = false;
3644 }
3645 break;
3646 case 5:
3647 /* 0x5000-0x5FFF: human interface helpers */
3648 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3649 &ignore_acpi_ev);
3650 break;
3651 case 6:
3652 /* 0x6000-0x6FFF: thermal alarms */
3653 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3654 &ignore_acpi_ev);
3655 break;
3656 case 7:
3657 /* 0x7000-0x7FFF: misc */
3658 if (tp_features.hotkey_wlsw &&
3659 hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3660 tpacpi_send_radiosw_update();
3661 send_acpi_ev = 0;
3662 known_ev = true;
3663 break;
3664 }
3665 /* fallthrough to default */
3666 default:
3667 known_ev = false;
3668 }
3669 if (!known_ev) {
3670 printk(TPACPI_NOTICE
3671 "unhandled HKEY event 0x%04x\n", hkey);
3672 printk(TPACPI_NOTICE
3673 "please report the conditions when this "
3674 "event happened to %s\n", TPACPI_MAIL);
3675 }
3676
3677 /* Legacy events */
3678 if (!ignore_acpi_ev &&
3679 (send_acpi_ev || hotkey_report_mode < 2)) {
3680 acpi_bus_generate_proc_event(ibm->acpi->device,
3681 event, hkey);
3682 }
3683
3684 /* netlink events */
3685 if (!ignore_acpi_ev && send_acpi_ev) {
3686 acpi_bus_generate_netlink_event(
3687 ibm->acpi->device->pnp.device_class,
3688 dev_name(&ibm->acpi->device->dev),
3689 event, hkey);
3690 }
3691 }
3692 }
3693
3694 static void hotkey_suspend(pm_message_t state)
3695 {
3696 /* Do these on suspend, we get the events on early resume! */
3697 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3698 hotkey_autosleep_ack = 0;
3699 }
3700
3701 static void hotkey_resume(void)
3702 {
3703 tpacpi_disable_brightness_delay();
3704
3705 if (hotkey_status_set(true) < 0 ||
3706 hotkey_mask_set(hotkey_acpi_mask) < 0)
3707 printk(TPACPI_ERR
3708 "error while attempting to reset the event "
3709 "firmware interface\n");
3710
3711 tpacpi_send_radiosw_update();
3712 hotkey_tablet_mode_notify_change();
3713 hotkey_wakeup_reason_notify_change();
3714 hotkey_wakeup_hotunplug_complete_notify_change();
3715 hotkey_poll_setup_safe(false);
3716 }
3717
3718 /* procfs -------------------------------------------------------------- */
3719 static int hotkey_read(char *p)
3720 {
3721 int res, status;
3722 int len = 0;
3723
3724 if (!tp_features.hotkey) {
3725 len += sprintf(p + len, "status:\t\tnot supported\n");
3726 return len;
3727 }
3728
3729 if (mutex_lock_killable(&hotkey_mutex))
3730 return -ERESTARTSYS;
3731 res = hotkey_status_get(&status);
3732 if (!res)
3733 res = hotkey_mask_get();
3734 mutex_unlock(&hotkey_mutex);
3735 if (res)
3736 return res;
3737
3738 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3739 if (hotkey_all_mask) {
3740 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask);
3741 len += sprintf(p + len,
3742 "commands:\tenable, disable, reset, <mask>\n");
3743 } else {
3744 len += sprintf(p + len, "mask:\t\tnot supported\n");
3745 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3746 }
3747
3748 return len;
3749 }
3750
3751 static void hotkey_enabledisable_warn(bool enable)
3752 {
3753 tpacpi_log_usertask("procfs hotkey enable/disable");
3754 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3755 TPACPI_WARN
3756 "hotkey enable/disable functionality has been "
3757 "removed from the driver. Hotkeys are always "
3758 "enabled\n"))
3759 printk(TPACPI_ERR
3760 "Please remove the hotkey=enable module "
3761 "parameter, it is deprecated. Hotkeys are always "
3762 "enabled\n");
3763 }
3764
3765 static int hotkey_write(char *buf)
3766 {
3767 int res;
3768 u32 mask;
3769 char *cmd;
3770
3771 if (!tp_features.hotkey)
3772 return -ENODEV;
3773
3774 if (mutex_lock_killable(&hotkey_mutex))
3775 return -ERESTARTSYS;
3776
3777 mask = hotkey_user_mask;
3778
3779 res = 0;
3780 while ((cmd = next_cmd(&buf))) {
3781 if (strlencmp(cmd, "enable") == 0) {
3782 hotkey_enabledisable_warn(1);
3783 } else if (strlencmp(cmd, "disable") == 0) {
3784 hotkey_enabledisable_warn(0);
3785 res = -EPERM;
3786 } else if (strlencmp(cmd, "reset") == 0) {
3787 mask = (hotkey_all_mask | hotkey_source_mask)
3788 & ~hotkey_reserved_mask;
3789 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3790 /* mask set */
3791 } else if (sscanf(cmd, "%x", &mask) == 1) {
3792 /* mask set */
3793 } else {
3794 res = -EINVAL;
3795 goto errexit;
3796 }
3797 }
3798
3799 if (!res) {
3800 tpacpi_disclose_usertask("procfs hotkey",
3801 "set mask to 0x%08x\n", mask);
3802 res = hotkey_user_mask_set(mask);
3803 }
3804
3805 errexit:
3806 mutex_unlock(&hotkey_mutex);
3807 return res;
3808 }
3809
3810 static const struct acpi_device_id ibm_htk_device_ids[] = {
3811 {TPACPI_ACPI_HKEY_HID, 0},
3812 {"", 0},
3813 };
3814
3815 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3816 .hid = ibm_htk_device_ids,
3817 .notify = hotkey_notify,
3818 .handle = &hkey_handle,
3819 .type = ACPI_DEVICE_NOTIFY,
3820 };
3821
3822 static struct ibm_struct hotkey_driver_data = {
3823 .name = "hotkey",
3824 .read = hotkey_read,
3825 .write = hotkey_write,
3826 .exit = hotkey_exit,
3827 .resume = hotkey_resume,
3828 .suspend = hotkey_suspend,
3829 .acpi = &ibm_hotkey_acpidriver,
3830 };
3831
3832 /*************************************************************************
3833 * Bluetooth subdriver
3834 */
3835
3836 enum {
3837 /* ACPI GBDC/SBDC bits */
3838 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3839 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3840 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3841 off / last state */
3842 };
3843
3844 enum {
3845 /* ACPI \BLTH commands */
3846 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3847 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3848 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3849 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3850 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3851 };
3852
3853 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3854
3855 static void bluetooth_suspend(pm_message_t state)
3856 {
3857 /* Try to make sure radio will resume powered off */
3858 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3859 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3860 vdbg_printk(TPACPI_DBG_RFKILL,
3861 "bluetooth power down on resume request failed\n");
3862 }
3863
3864 static int bluetooth_get_status(void)
3865 {
3866 int status;
3867
3868 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3869 if (dbg_bluetoothemul)
3870 return (tpacpi_bluetooth_emulstate) ?
3871 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3872 #endif
3873
3874 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3875 return -EIO;
3876
3877 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3878 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3879 }
3880
3881 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3882 {
3883 int status;
3884
3885 vdbg_printk(TPACPI_DBG_RFKILL,
3886 "will attempt to %s bluetooth\n",
3887 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3888
3889 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3890 if (dbg_bluetoothemul) {
3891 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3892 return 0;
3893 }
3894 #endif
3895
3896 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3897 if (state == TPACPI_RFK_RADIO_ON)
3898 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3899 else
3900 status = 0;
3901
3902 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3903 return -EIO;
3904
3905 return 0;
3906 }
3907
3908 /* sysfs bluetooth enable ---------------------------------------------- */
3909 static ssize_t bluetooth_enable_show(struct device *dev,
3910 struct device_attribute *attr,
3911 char *buf)
3912 {
3913 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3914 attr, buf);
3915 }
3916
3917 static ssize_t bluetooth_enable_store(struct device *dev,
3918 struct device_attribute *attr,
3919 const char *buf, size_t count)
3920 {
3921 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3922 attr, buf, count);
3923 }
3924
3925 static struct device_attribute dev_attr_bluetooth_enable =
3926 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3927 bluetooth_enable_show, bluetooth_enable_store);
3928
3929 /* --------------------------------------------------------------------- */
3930
3931 static struct attribute *bluetooth_attributes[] = {
3932 &dev_attr_bluetooth_enable.attr,
3933 NULL
3934 };
3935
3936 static const struct attribute_group bluetooth_attr_group = {
3937 .attrs = bluetooth_attributes,
3938 };
3939
3940 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3941 .get_status = bluetooth_get_status,
3942 .set_status = bluetooth_set_status,
3943 };
3944
3945 static void bluetooth_shutdown(void)
3946 {
3947 /* Order firmware to save current state to NVRAM */
3948 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3949 TP_ACPI_BLTH_SAVE_STATE))
3950 printk(TPACPI_NOTICE
3951 "failed to save bluetooth state to NVRAM\n");
3952 else
3953 vdbg_printk(TPACPI_DBG_RFKILL,
3954 "bluestooth state saved to NVRAM\n");
3955 }
3956
3957 static void bluetooth_exit(void)
3958 {
3959 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3960 &bluetooth_attr_group);
3961
3962 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3963
3964 bluetooth_shutdown();
3965 }
3966
3967 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3968 {
3969 int res;
3970 int status = 0;
3971
3972 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3973 "initializing bluetooth subdriver\n");
3974
3975 TPACPI_ACPIHANDLE_INIT(hkey);
3976
3977 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3978 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3979 tp_features.bluetooth = hkey_handle &&
3980 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3981
3982 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3983 "bluetooth is %s, status 0x%02x\n",
3984 str_supported(tp_features.bluetooth),
3985 status);
3986
3987 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3988 if (dbg_bluetoothemul) {
3989 tp_features.bluetooth = 1;
3990 printk(TPACPI_INFO
3991 "bluetooth switch emulation enabled\n");
3992 } else
3993 #endif
3994 if (tp_features.bluetooth &&
3995 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3996 /* no bluetooth hardware present in system */
3997 tp_features.bluetooth = 0;
3998 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3999 "bluetooth hardware not installed\n");
4000 }
4001
4002 if (!tp_features.bluetooth)
4003 return 1;
4004
4005 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4006 &bluetooth_tprfk_ops,
4007 RFKILL_TYPE_BLUETOOTH,
4008 TPACPI_RFK_BLUETOOTH_SW_NAME,
4009 true);
4010 if (res)
4011 return res;
4012
4013 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4014 &bluetooth_attr_group);
4015 if (res) {
4016 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4017 return res;
4018 }
4019
4020 return 0;
4021 }
4022
4023 /* procfs -------------------------------------------------------------- */
4024 static int bluetooth_read(char *p)
4025 {
4026 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
4027 }
4028
4029 static int bluetooth_write(char *buf)
4030 {
4031 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4032 }
4033
4034 static struct ibm_struct bluetooth_driver_data = {
4035 .name = "bluetooth",
4036 .read = bluetooth_read,
4037 .write = bluetooth_write,
4038 .exit = bluetooth_exit,
4039 .suspend = bluetooth_suspend,
4040 .shutdown = bluetooth_shutdown,
4041 };
4042
4043 /*************************************************************************
4044 * Wan subdriver
4045 */
4046
4047 enum {
4048 /* ACPI GWAN/SWAN bits */
4049 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
4050 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
4051 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
4052 off / last state */
4053 };
4054
4055 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
4056
4057 static void wan_suspend(pm_message_t state)
4058 {
4059 /* Try to make sure radio will resume powered off */
4060 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
4061 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
4062 vdbg_printk(TPACPI_DBG_RFKILL,
4063 "WWAN power down on resume request failed\n");
4064 }
4065
4066 static int wan_get_status(void)
4067 {
4068 int status;
4069
4070 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4071 if (dbg_wwanemul)
4072 return (tpacpi_wwan_emulstate) ?
4073 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4074 #endif
4075
4076 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4077 return -EIO;
4078
4079 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4080 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4081 }
4082
4083 static int wan_set_status(enum tpacpi_rfkill_state state)
4084 {
4085 int status;
4086
4087 vdbg_printk(TPACPI_DBG_RFKILL,
4088 "will attempt to %s wwan\n",
4089 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4090
4091 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4092 if (dbg_wwanemul) {
4093 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4094 return 0;
4095 }
4096 #endif
4097
4098 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
4099 if (state == TPACPI_RFK_RADIO_ON)
4100 status = TP_ACPI_WANCARD_RADIOSSW;
4101 else
4102 status = 0;
4103
4104 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4105 return -EIO;
4106
4107 return 0;
4108 }
4109
4110 /* sysfs wan enable ---------------------------------------------------- */
4111 static ssize_t wan_enable_show(struct device *dev,
4112 struct device_attribute *attr,
4113 char *buf)
4114 {
4115 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4116 attr, buf);
4117 }
4118
4119 static ssize_t wan_enable_store(struct device *dev,
4120 struct device_attribute *attr,
4121 const char *buf, size_t count)
4122 {
4123 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4124 attr, buf, count);
4125 }
4126
4127 static struct device_attribute dev_attr_wan_enable =
4128 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4129 wan_enable_show, wan_enable_store);
4130
4131 /* --------------------------------------------------------------------- */
4132
4133 static struct attribute *wan_attributes[] = {
4134 &dev_attr_wan_enable.attr,
4135 NULL
4136 };
4137
4138 static const struct attribute_group wan_attr_group = {
4139 .attrs = wan_attributes,
4140 };
4141
4142 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4143 .get_status = wan_get_status,
4144 .set_status = wan_set_status,
4145 };
4146
4147 static void wan_shutdown(void)
4148 {
4149 /* Order firmware to save current state to NVRAM */
4150 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4151 TP_ACPI_WGSV_SAVE_STATE))
4152 printk(TPACPI_NOTICE
4153 "failed to save WWAN state to NVRAM\n");
4154 else
4155 vdbg_printk(TPACPI_DBG_RFKILL,
4156 "WWAN state saved to NVRAM\n");
4157 }
4158
4159 static void wan_exit(void)
4160 {
4161 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4162 &wan_attr_group);
4163
4164 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4165
4166 wan_shutdown();
4167 }
4168
4169 static int __init wan_init(struct ibm_init_struct *iibm)
4170 {
4171 int res;
4172 int status = 0;
4173
4174 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4175 "initializing wan subdriver\n");
4176
4177 TPACPI_ACPIHANDLE_INIT(hkey);
4178
4179 tp_features.wan = hkey_handle &&
4180 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4181
4182 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4183 "wan is %s, status 0x%02x\n",
4184 str_supported(tp_features.wan),
4185 status);
4186
4187 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4188 if (dbg_wwanemul) {
4189 tp_features.wan = 1;
4190 printk(TPACPI_INFO
4191 "wwan switch emulation enabled\n");
4192 } else
4193 #endif
4194 if (tp_features.wan &&
4195 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4196 /* no wan hardware present in system */
4197 tp_features.wan = 0;
4198 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4199 "wan hardware not installed\n");
4200 }
4201
4202 if (!tp_features.wan)
4203 return 1;
4204
4205 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4206 &wan_tprfk_ops,
4207 RFKILL_TYPE_WWAN,
4208 TPACPI_RFK_WWAN_SW_NAME,
4209 true);
4210 if (res)
4211 return res;
4212
4213 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4214 &wan_attr_group);
4215
4216 if (res) {
4217 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4218 return res;
4219 }
4220
4221 return 0;
4222 }
4223
4224 /* procfs -------------------------------------------------------------- */
4225 static int wan_read(char *p)
4226 {
4227 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4228 }
4229
4230 static int wan_write(char *buf)
4231 {
4232 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4233 }
4234
4235 static struct ibm_struct wan_driver_data = {
4236 .name = "wan",
4237 .read = wan_read,
4238 .write = wan_write,
4239 .exit = wan_exit,
4240 .suspend = wan_suspend,
4241 .shutdown = wan_shutdown,
4242 };
4243
4244 /*************************************************************************
4245 * UWB subdriver
4246 */
4247
4248 enum {
4249 /* ACPI GUWB/SUWB bits */
4250 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4251 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4252 };
4253
4254 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4255
4256 static int uwb_get_status(void)
4257 {
4258 int status;
4259
4260 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4261 if (dbg_uwbemul)
4262 return (tpacpi_uwb_emulstate) ?
4263 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4264 #endif
4265
4266 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4267 return -EIO;
4268
4269 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4270 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4271 }
4272
4273 static int uwb_set_status(enum tpacpi_rfkill_state state)
4274 {
4275 int status;
4276
4277 vdbg_printk(TPACPI_DBG_RFKILL,
4278 "will attempt to %s UWB\n",
4279 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4280
4281 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4282 if (dbg_uwbemul) {
4283 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4284 return 0;
4285 }
4286 #endif
4287
4288 if (state == TPACPI_RFK_RADIO_ON)
4289 status = TP_ACPI_UWB_RADIOSSW;
4290 else
4291 status = 0;
4292
4293 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4294 return -EIO;
4295
4296 return 0;
4297 }
4298
4299 /* --------------------------------------------------------------------- */
4300
4301 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4302 .get_status = uwb_get_status,
4303 .set_status = uwb_set_status,
4304 };
4305
4306 static void uwb_exit(void)
4307 {
4308 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4309 }
4310
4311 static int __init uwb_init(struct ibm_init_struct *iibm)
4312 {
4313 int res;
4314 int status = 0;
4315
4316 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4317 "initializing uwb subdriver\n");
4318
4319 TPACPI_ACPIHANDLE_INIT(hkey);
4320
4321 tp_features.uwb = hkey_handle &&
4322 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4323
4324 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4325 "uwb is %s, status 0x%02x\n",
4326 str_supported(tp_features.uwb),
4327 status);
4328
4329 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4330 if (dbg_uwbemul) {
4331 tp_features.uwb = 1;
4332 printk(TPACPI_INFO
4333 "uwb switch emulation enabled\n");
4334 } else
4335 #endif
4336 if (tp_features.uwb &&
4337 !(status & TP_ACPI_UWB_HWPRESENT)) {
4338 /* no uwb hardware present in system */
4339 tp_features.uwb = 0;
4340 dbg_printk(TPACPI_DBG_INIT,
4341 "uwb hardware not installed\n");
4342 }
4343
4344 if (!tp_features.uwb)
4345 return 1;
4346
4347 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4348 &uwb_tprfk_ops,
4349 RFKILL_TYPE_UWB,
4350 TPACPI_RFK_UWB_SW_NAME,
4351 false);
4352 return res;
4353 }
4354
4355 static struct ibm_struct uwb_driver_data = {
4356 .name = "uwb",
4357 .exit = uwb_exit,
4358 .flags.experimental = 1,
4359 };
4360
4361 /*************************************************************************
4362 * Video subdriver
4363 */
4364
4365 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4366
4367 enum video_access_mode {
4368 TPACPI_VIDEO_NONE = 0,
4369 TPACPI_VIDEO_570, /* 570 */
4370 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4371 TPACPI_VIDEO_NEW, /* all others */
4372 };
4373
4374 enum { /* video status flags, based on VIDEO_570 */
4375 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4376 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4377 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4378 };
4379
4380 enum { /* TPACPI_VIDEO_570 constants */
4381 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4382 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4383 * video_status_flags */
4384 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4385 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4386 };
4387
4388 static enum video_access_mode video_supported;
4389 static int video_orig_autosw;
4390
4391 static int video_autosw_get(void);
4392 static int video_autosw_set(int enable);
4393
4394 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4395
4396 static int __init video_init(struct ibm_init_struct *iibm)
4397 {
4398 int ivga;
4399
4400 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4401
4402 TPACPI_ACPIHANDLE_INIT(vid);
4403 TPACPI_ACPIHANDLE_INIT(vid2);
4404
4405 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4406 /* G41, assume IVGA doesn't change */
4407 vid_handle = vid2_handle;
4408
4409 if (!vid_handle)
4410 /* video switching not supported on R30, R31 */
4411 video_supported = TPACPI_VIDEO_NONE;
4412 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4413 /* 570 */
4414 video_supported = TPACPI_VIDEO_570;
4415 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4416 /* 600e/x, 770e, 770x */
4417 video_supported = TPACPI_VIDEO_770;
4418 else
4419 /* all others */
4420 video_supported = TPACPI_VIDEO_NEW;
4421
4422 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4423 str_supported(video_supported != TPACPI_VIDEO_NONE),
4424 video_supported);
4425
4426 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4427 }
4428
4429 static void video_exit(void)
4430 {
4431 dbg_printk(TPACPI_DBG_EXIT,
4432 "restoring original video autoswitch mode\n");
4433 if (video_autosw_set(video_orig_autosw))
4434 printk(TPACPI_ERR "error while trying to restore original "
4435 "video autoswitch mode\n");
4436 }
4437
4438 static int video_outputsw_get(void)
4439 {
4440 int status = 0;
4441 int i;
4442
4443 switch (video_supported) {
4444 case TPACPI_VIDEO_570:
4445 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4446 TP_ACPI_VIDEO_570_PHSCMD))
4447 return -EIO;
4448 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4449 break;
4450 case TPACPI_VIDEO_770:
4451 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4452 return -EIO;
4453 if (i)
4454 status |= TP_ACPI_VIDEO_S_LCD;
4455 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4456 return -EIO;
4457 if (i)
4458 status |= TP_ACPI_VIDEO_S_CRT;
4459 break;
4460 case TPACPI_VIDEO_NEW:
4461 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4462 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4463 return -EIO;
4464 if (i)
4465 status |= TP_ACPI_VIDEO_S_CRT;
4466
4467 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4468 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4469 return -EIO;
4470 if (i)
4471 status |= TP_ACPI_VIDEO_S_LCD;
4472 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4473 return -EIO;
4474 if (i)
4475 status |= TP_ACPI_VIDEO_S_DVI;
4476 break;
4477 default:
4478 return -ENOSYS;
4479 }
4480
4481 return status;
4482 }
4483
4484 static int video_outputsw_set(int status)
4485 {
4486 int autosw;
4487 int res = 0;
4488
4489 switch (video_supported) {
4490 case TPACPI_VIDEO_570:
4491 res = acpi_evalf(NULL, NULL,
4492 "\\_SB.PHS2", "vdd",
4493 TP_ACPI_VIDEO_570_PHS2CMD,
4494 status | TP_ACPI_VIDEO_570_PHS2SET);
4495 break;
4496 case TPACPI_VIDEO_770:
4497 autosw = video_autosw_get();
4498 if (autosw < 0)
4499 return autosw;
4500
4501 res = video_autosw_set(1);
4502 if (res)
4503 return res;
4504 res = acpi_evalf(vid_handle, NULL,
4505 "ASWT", "vdd", status * 0x100, 0);
4506 if (!autosw && video_autosw_set(autosw)) {
4507 printk(TPACPI_ERR
4508 "video auto-switch left enabled due to error\n");
4509 return -EIO;
4510 }
4511 break;
4512 case TPACPI_VIDEO_NEW:
4513 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4514 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4515 break;
4516 default:
4517 return -ENOSYS;
4518 }
4519
4520 return (res)? 0 : -EIO;
4521 }
4522
4523 static int video_autosw_get(void)
4524 {
4525 int autosw = 0;
4526
4527 switch (video_supported) {
4528 case TPACPI_VIDEO_570:
4529 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4530 return -EIO;
4531 break;
4532 case TPACPI_VIDEO_770:
4533 case TPACPI_VIDEO_NEW:
4534 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4535 return -EIO;
4536 break;
4537 default:
4538 return -ENOSYS;
4539 }
4540
4541 return autosw & 1;
4542 }
4543
4544 static int video_autosw_set(int enable)
4545 {
4546 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4547 return -EIO;
4548 return 0;
4549 }
4550
4551 static int video_outputsw_cycle(void)
4552 {
4553 int autosw = video_autosw_get();
4554 int res;
4555
4556 if (autosw < 0)
4557 return autosw;
4558
4559 switch (video_supported) {
4560 case TPACPI_VIDEO_570:
4561 res = video_autosw_set(1);
4562 if (res)
4563 return res;
4564 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4565 break;
4566 case TPACPI_VIDEO_770:
4567 case TPACPI_VIDEO_NEW:
4568 res = video_autosw_set(1);
4569 if (res)
4570 return res;
4571 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4572 break;
4573 default:
4574 return -ENOSYS;
4575 }
4576 if (!autosw && video_autosw_set(autosw)) {
4577 printk(TPACPI_ERR
4578 "video auto-switch left enabled due to error\n");
4579 return -EIO;
4580 }
4581
4582 return (res)? 0 : -EIO;
4583 }
4584
4585 static int video_expand_toggle(void)
4586 {
4587 switch (video_supported) {
4588 case TPACPI_VIDEO_570:
4589 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4590 0 : -EIO;
4591 case TPACPI_VIDEO_770:
4592 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4593 0 : -EIO;
4594 case TPACPI_VIDEO_NEW:
4595 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4596 0 : -EIO;
4597 default:
4598 return -ENOSYS;
4599 }
4600 /* not reached */
4601 }
4602
4603 static int video_read(char *p)
4604 {
4605 int status, autosw;
4606 int len = 0;
4607
4608 if (video_supported == TPACPI_VIDEO_NONE) {
4609 len += sprintf(p + len, "status:\t\tnot supported\n");
4610 return len;
4611 }
4612
4613 status = video_outputsw_get();
4614 if (status < 0)
4615 return status;
4616
4617 autosw = video_autosw_get();
4618 if (autosw < 0)
4619 return autosw;
4620
4621 len += sprintf(p + len, "status:\t\tsupported\n");
4622 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4623 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4624 if (video_supported == TPACPI_VIDEO_NEW)
4625 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4626 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4627 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4628 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4629 if (video_supported == TPACPI_VIDEO_NEW)
4630 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4631 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4632 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4633
4634 return len;
4635 }
4636
4637 static int video_write(char *buf)
4638 {
4639 char *cmd;
4640 int enable, disable, status;
4641 int res;
4642
4643 if (video_supported == TPACPI_VIDEO_NONE)
4644 return -ENODEV;
4645
4646 enable = 0;
4647 disable = 0;
4648
4649 while ((cmd = next_cmd(&buf))) {
4650 if (strlencmp(cmd, "lcd_enable") == 0) {
4651 enable |= TP_ACPI_VIDEO_S_LCD;
4652 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4653 disable |= TP_ACPI_VIDEO_S_LCD;
4654 } else if (strlencmp(cmd, "crt_enable") == 0) {
4655 enable |= TP_ACPI_VIDEO_S_CRT;
4656 } else if (strlencmp(cmd, "crt_disable") == 0) {
4657 disable |= TP_ACPI_VIDEO_S_CRT;
4658 } else if (video_supported == TPACPI_VIDEO_NEW &&
4659 strlencmp(cmd, "dvi_enable") == 0) {
4660 enable |= TP_ACPI_VIDEO_S_DVI;
4661 } else if (video_supported == TPACPI_VIDEO_NEW &&
4662 strlencmp(cmd, "dvi_disable") == 0) {
4663 disable |= TP_ACPI_VIDEO_S_DVI;
4664 } else if (strlencmp(cmd, "auto_enable") == 0) {
4665 res = video_autosw_set(1);
4666 if (res)
4667 return res;
4668 } else if (strlencmp(cmd, "auto_disable") == 0) {
4669 res = video_autosw_set(0);
4670 if (res)
4671 return res;
4672 } else if (strlencmp(cmd, "video_switch") == 0) {
4673 res = video_outputsw_cycle();
4674 if (res)
4675 return res;
4676 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4677 res = video_expand_toggle();
4678 if (res)
4679 return res;
4680 } else
4681 return -EINVAL;
4682 }
4683
4684 if (enable || disable) {
4685 status = video_outputsw_get();
4686 if (status < 0)
4687 return status;
4688 res = video_outputsw_set((status & ~disable) | enable);
4689 if (res)
4690 return res;
4691 }
4692
4693 return 0;
4694 }
4695
4696 static struct ibm_struct video_driver_data = {
4697 .name = "video",
4698 .read = video_read,
4699 .write = video_write,
4700 .exit = video_exit,
4701 };
4702
4703 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4704
4705 /*************************************************************************
4706 * Light (thinklight) subdriver
4707 */
4708
4709 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4710 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4711
4712 static int light_get_status(void)
4713 {
4714 int status = 0;
4715
4716 if (tp_features.light_status) {
4717 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4718 return -EIO;
4719 return (!!status);
4720 }
4721
4722 return -ENXIO;
4723 }
4724
4725 static int light_set_status(int status)
4726 {
4727 int rc;
4728
4729 if (tp_features.light) {
4730 if (cmos_handle) {
4731 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4732 (status)?
4733 TP_CMOS_THINKLIGHT_ON :
4734 TP_CMOS_THINKLIGHT_OFF);
4735 } else {
4736 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4737 (status)? 1 : 0);
4738 }
4739 return (rc)? 0 : -EIO;
4740 }
4741
4742 return -ENXIO;
4743 }
4744
4745 static void light_set_status_worker(struct work_struct *work)
4746 {
4747 struct tpacpi_led_classdev *data =
4748 container_of(work, struct tpacpi_led_classdev, work);
4749
4750 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4751 light_set_status((data->new_state != TPACPI_LED_OFF));
4752 }
4753
4754 static void light_sysfs_set(struct led_classdev *led_cdev,
4755 enum led_brightness brightness)
4756 {
4757 struct tpacpi_led_classdev *data =
4758 container_of(led_cdev,
4759 struct tpacpi_led_classdev,
4760 led_classdev);
4761 data->new_state = (brightness != LED_OFF) ?
4762 TPACPI_LED_ON : TPACPI_LED_OFF;
4763 queue_work(tpacpi_wq, &data->work);
4764 }
4765
4766 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4767 {
4768 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4769 }
4770
4771 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4772 .led_classdev = {
4773 .name = "tpacpi::thinklight",
4774 .brightness_set = &light_sysfs_set,
4775 .brightness_get = &light_sysfs_get,
4776 }
4777 };
4778
4779 static int __init light_init(struct ibm_init_struct *iibm)
4780 {
4781 int rc;
4782
4783 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4784
4785 TPACPI_ACPIHANDLE_INIT(ledb);
4786 TPACPI_ACPIHANDLE_INIT(lght);
4787 TPACPI_ACPIHANDLE_INIT(cmos);
4788 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4789
4790 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4791 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4792
4793 if (tp_features.light)
4794 /* light status not supported on
4795 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4796 tp_features.light_status =
4797 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4798
4799 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4800 str_supported(tp_features.light),
4801 str_supported(tp_features.light_status));
4802
4803 if (!tp_features.light)
4804 return 1;
4805
4806 rc = led_classdev_register(&tpacpi_pdev->dev,
4807 &tpacpi_led_thinklight.led_classdev);
4808
4809 if (rc < 0) {
4810 tp_features.light = 0;
4811 tp_features.light_status = 0;
4812 } else {
4813 rc = 0;
4814 }
4815
4816 return rc;
4817 }
4818
4819 static void light_exit(void)
4820 {
4821 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4822 if (work_pending(&tpacpi_led_thinklight.work))
4823 flush_workqueue(tpacpi_wq);
4824 }
4825
4826 static int light_read(char *p)
4827 {
4828 int len = 0;
4829 int status;
4830
4831 if (!tp_features.light) {
4832 len += sprintf(p + len, "status:\t\tnot supported\n");
4833 } else if (!tp_features.light_status) {
4834 len += sprintf(p + len, "status:\t\tunknown\n");
4835 len += sprintf(p + len, "commands:\ton, off\n");
4836 } else {
4837 status = light_get_status();
4838 if (status < 0)
4839 return status;
4840 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4841 len += sprintf(p + len, "commands:\ton, off\n");
4842 }
4843
4844 return len;
4845 }
4846
4847 static int light_write(char *buf)
4848 {
4849 char *cmd;
4850 int newstatus = 0;
4851
4852 if (!tp_features.light)
4853 return -ENODEV;
4854
4855 while ((cmd = next_cmd(&buf))) {
4856 if (strlencmp(cmd, "on") == 0) {
4857 newstatus = 1;
4858 } else if (strlencmp(cmd, "off") == 0) {
4859 newstatus = 0;
4860 } else
4861 return -EINVAL;
4862 }
4863
4864 return light_set_status(newstatus);
4865 }
4866
4867 static struct ibm_struct light_driver_data = {
4868 .name = "light",
4869 .read = light_read,
4870 .write = light_write,
4871 .exit = light_exit,
4872 };
4873
4874 /*************************************************************************
4875 * CMOS subdriver
4876 */
4877
4878 /* sysfs cmos_command -------------------------------------------------- */
4879 static ssize_t cmos_command_store(struct device *dev,
4880 struct device_attribute *attr,
4881 const char *buf, size_t count)
4882 {
4883 unsigned long cmos_cmd;
4884 int res;
4885
4886 if (parse_strtoul(buf, 21, &cmos_cmd))
4887 return -EINVAL;
4888
4889 res = issue_thinkpad_cmos_command(cmos_cmd);
4890 return (res)? res : count;
4891 }
4892
4893 static struct device_attribute dev_attr_cmos_command =
4894 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4895
4896 /* --------------------------------------------------------------------- */
4897
4898 static int __init cmos_init(struct ibm_init_struct *iibm)
4899 {
4900 int res;
4901
4902 vdbg_printk(TPACPI_DBG_INIT,
4903 "initializing cmos commands subdriver\n");
4904
4905 TPACPI_ACPIHANDLE_INIT(cmos);
4906
4907 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4908 str_supported(cmos_handle != NULL));
4909
4910 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4911 if (res)
4912 return res;
4913
4914 return (cmos_handle)? 0 : 1;
4915 }
4916
4917 static void cmos_exit(void)
4918 {
4919 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4920 }
4921
4922 static int cmos_read(char *p)
4923 {
4924 int len = 0;
4925
4926 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4927 R30, R31, T20-22, X20-21 */
4928 if (!cmos_handle)
4929 len += sprintf(p + len, "status:\t\tnot supported\n");
4930 else {
4931 len += sprintf(p + len, "status:\t\tsupported\n");
4932 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4933 }
4934
4935 return len;
4936 }
4937
4938 static int cmos_write(char *buf)
4939 {
4940 char *cmd;
4941 int cmos_cmd, res;
4942
4943 while ((cmd = next_cmd(&buf))) {
4944 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4945 cmos_cmd >= 0 && cmos_cmd <= 21) {
4946 /* cmos_cmd set */
4947 } else
4948 return -EINVAL;
4949
4950 res = issue_thinkpad_cmos_command(cmos_cmd);
4951 if (res)
4952 return res;
4953 }
4954
4955 return 0;
4956 }
4957
4958 static struct ibm_struct cmos_driver_data = {
4959 .name = "cmos",
4960 .read = cmos_read,
4961 .write = cmos_write,
4962 .exit = cmos_exit,
4963 };
4964
4965 /*************************************************************************
4966 * LED subdriver
4967 */
4968
4969 enum led_access_mode {
4970 TPACPI_LED_NONE = 0,
4971 TPACPI_LED_570, /* 570 */
4972 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4973 TPACPI_LED_NEW, /* all others */
4974 };
4975
4976 enum { /* For TPACPI_LED_OLD */
4977 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4978 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4979 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4980 };
4981
4982 static enum led_access_mode led_supported;
4983
4984 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4985 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4986 /* T20-22, X20-21 */
4987 "LED", /* all others */
4988 ); /* R30, R31 */
4989
4990 #define TPACPI_LED_NUMLEDS 16
4991 static struct tpacpi_led_classdev *tpacpi_leds;
4992 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4993 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4994 /* there's a limit of 19 chars + NULL before 2.6.26 */
4995 "tpacpi::power",
4996 "tpacpi:orange:batt",
4997 "tpacpi:green:batt",
4998 "tpacpi::dock_active",
4999 "tpacpi::bay_active",
5000 "tpacpi::dock_batt",
5001 "tpacpi::unknown_led",
5002 "tpacpi::standby",
5003 "tpacpi::dock_status1",
5004 "tpacpi::dock_status2",
5005 "tpacpi::unknown_led2",
5006 "tpacpi::unknown_led3",
5007 "tpacpi::thinkvantage",
5008 };
5009 #define TPACPI_SAFE_LEDS 0x1081U
5010
5011 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5012 {
5013 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5014 return false;
5015 #else
5016 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5017 #endif
5018 }
5019
5020 static int led_get_status(const unsigned int led)
5021 {
5022 int status;
5023 enum led_status_t led_s;
5024
5025 switch (led_supported) {
5026 case TPACPI_LED_570:
5027 if (!acpi_evalf(ec_handle,
5028 &status, "GLED", "dd", 1 << led))
5029 return -EIO;
5030 led_s = (status == 0)?
5031 TPACPI_LED_OFF :
5032 ((status == 1)?
5033 TPACPI_LED_ON :
5034 TPACPI_LED_BLINK);
5035 tpacpi_led_state_cache[led] = led_s;
5036 return led_s;
5037 default:
5038 return -ENXIO;
5039 }
5040
5041 /* not reached */
5042 }
5043
5044 static int led_set_status(const unsigned int led,
5045 const enum led_status_t ledstatus)
5046 {
5047 /* off, on, blink. Index is led_status_t */
5048 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5049 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5050
5051 int rc = 0;
5052
5053 switch (led_supported) {
5054 case TPACPI_LED_570:
5055 /* 570 */
5056 if (unlikely(led > 7))
5057 return -EINVAL;
5058 if (unlikely(tpacpi_is_led_restricted(led)))
5059 return -EPERM;
5060 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5061 (1 << led), led_sled_arg1[ledstatus]))
5062 rc = -EIO;
5063 break;
5064 case TPACPI_LED_OLD:
5065 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5066 if (unlikely(led > 7))
5067 return -EINVAL;
5068 if (unlikely(tpacpi_is_led_restricted(led)))
5069 return -EPERM;
5070 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5071 if (rc >= 0)
5072 rc = ec_write(TPACPI_LED_EC_HLBL,
5073 (ledstatus == TPACPI_LED_BLINK) << led);
5074 if (rc >= 0)
5075 rc = ec_write(TPACPI_LED_EC_HLCL,
5076 (ledstatus != TPACPI_LED_OFF) << led);
5077 break;
5078 case TPACPI_LED_NEW:
5079 /* all others */
5080 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5081 return -EINVAL;
5082 if (unlikely(tpacpi_is_led_restricted(led)))
5083 return -EPERM;
5084 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5085 led, led_led_arg1[ledstatus]))
5086 rc = -EIO;
5087 break;
5088 default:
5089 rc = -ENXIO;
5090 }
5091
5092 if (!rc)
5093 tpacpi_led_state_cache[led] = ledstatus;
5094
5095 return rc;
5096 }
5097
5098 static void led_set_status_worker(struct work_struct *work)
5099 {
5100 struct tpacpi_led_classdev *data =
5101 container_of(work, struct tpacpi_led_classdev, work);
5102
5103 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5104 led_set_status(data->led, data->new_state);
5105 }
5106
5107 static void led_sysfs_set(struct led_classdev *led_cdev,
5108 enum led_brightness brightness)
5109 {
5110 struct tpacpi_led_classdev *data = container_of(led_cdev,
5111 struct tpacpi_led_classdev, led_classdev);
5112
5113 if (brightness == LED_OFF)
5114 data->new_state = TPACPI_LED_OFF;
5115 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5116 data->new_state = TPACPI_LED_ON;
5117 else
5118 data->new_state = TPACPI_LED_BLINK;
5119
5120 queue_work(tpacpi_wq, &data->work);
5121 }
5122
5123 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5124 unsigned long *delay_on, unsigned long *delay_off)
5125 {
5126 struct tpacpi_led_classdev *data = container_of(led_cdev,
5127 struct tpacpi_led_classdev, led_classdev);
5128
5129 /* Can we choose the flash rate? */
5130 if (*delay_on == 0 && *delay_off == 0) {
5131 /* yes. set them to the hardware blink rate (1 Hz) */
5132 *delay_on = 500; /* ms */
5133 *delay_off = 500; /* ms */
5134 } else if ((*delay_on != 500) || (*delay_off != 500))
5135 return -EINVAL;
5136
5137 data->new_state = TPACPI_LED_BLINK;
5138 queue_work(tpacpi_wq, &data->work);
5139
5140 return 0;
5141 }
5142
5143 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5144 {
5145 int rc;
5146
5147 struct tpacpi_led_classdev *data = container_of(led_cdev,
5148 struct tpacpi_led_classdev, led_classdev);
5149
5150 rc = led_get_status(data->led);
5151
5152 if (rc == TPACPI_LED_OFF || rc < 0)
5153 rc = LED_OFF; /* no error handling in led class :( */
5154 else
5155 rc = LED_FULL;
5156
5157 return rc;
5158 }
5159
5160 static void led_exit(void)
5161 {
5162 unsigned int i;
5163
5164 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5165 if (tpacpi_leds[i].led_classdev.name)
5166 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5167 }
5168
5169 kfree(tpacpi_leds);
5170 }
5171
5172 static int __init tpacpi_init_led(unsigned int led)
5173 {
5174 int rc;
5175
5176 tpacpi_leds[led].led = led;
5177
5178 /* LEDs with no name don't get registered */
5179 if (!tpacpi_led_names[led])
5180 return 0;
5181
5182 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5183 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5184 if (led_supported == TPACPI_LED_570)
5185 tpacpi_leds[led].led_classdev.brightness_get =
5186 &led_sysfs_get;
5187
5188 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5189
5190 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5191
5192 rc = led_classdev_register(&tpacpi_pdev->dev,
5193 &tpacpi_leds[led].led_classdev);
5194 if (rc < 0)
5195 tpacpi_leds[led].led_classdev.name = NULL;
5196
5197 return rc;
5198 }
5199
5200 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5201 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5202 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5203 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5204
5205 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5206 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5207 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5208 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5209 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5210 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5211 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5212 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5213
5214 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5215 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5216 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5217 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5218 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5219
5220 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5221 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5222 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5223 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5224
5225 /* (1) - may have excess leds enabled on MSB */
5226
5227 /* Defaults (order matters, keep last, don't reorder!) */
5228 { /* Lenovo */
5229 .vendor = PCI_VENDOR_ID_LENOVO,
5230 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5231 .quirks = 0x1fffU,
5232 },
5233 { /* IBM ThinkPads with no EC version string */
5234 .vendor = PCI_VENDOR_ID_IBM,
5235 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5236 .quirks = 0x00ffU,
5237 },
5238 { /* IBM ThinkPads with EC version string */
5239 .vendor = PCI_VENDOR_ID_IBM,
5240 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5241 .quirks = 0x00bfU,
5242 },
5243 };
5244
5245 #undef TPACPI_LEDQ_IBM
5246 #undef TPACPI_LEDQ_LNV
5247
5248 static int __init led_init(struct ibm_init_struct *iibm)
5249 {
5250 unsigned int i;
5251 int rc;
5252 unsigned long useful_leds;
5253
5254 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5255
5256 TPACPI_ACPIHANDLE_INIT(led);
5257
5258 if (!led_handle)
5259 /* led not supported on R30, R31 */
5260 led_supported = TPACPI_LED_NONE;
5261 else if (strlencmp(led_path, "SLED") == 0)
5262 /* 570 */
5263 led_supported = TPACPI_LED_570;
5264 else if (strlencmp(led_path, "SYSL") == 0)
5265 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5266 led_supported = TPACPI_LED_OLD;
5267 else
5268 /* all others */
5269 led_supported = TPACPI_LED_NEW;
5270
5271 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5272 str_supported(led_supported), led_supported);
5273
5274 if (led_supported == TPACPI_LED_NONE)
5275 return 1;
5276
5277 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5278 GFP_KERNEL);
5279 if (!tpacpi_leds) {
5280 printk(TPACPI_ERR "Out of memory for LED data\n");
5281 return -ENOMEM;
5282 }
5283
5284 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5285 ARRAY_SIZE(led_useful_qtable));
5286
5287 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5288 if (!tpacpi_is_led_restricted(i) &&
5289 test_bit(i, &useful_leds)) {
5290 rc = tpacpi_init_led(i);
5291 if (rc < 0) {
5292 led_exit();
5293 return rc;
5294 }
5295 }
5296 }
5297
5298 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5299 printk(TPACPI_NOTICE
5300 "warning: userspace override of important "
5301 "firmware LEDs is enabled\n");
5302 #endif
5303 return 0;
5304 }
5305
5306 #define str_led_status(s) \
5307 ((s) == TPACPI_LED_OFF ? "off" : \
5308 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5309
5310 static int led_read(char *p)
5311 {
5312 int len = 0;
5313
5314 if (!led_supported) {
5315 len += sprintf(p + len, "status:\t\tnot supported\n");
5316 return len;
5317 }
5318 len += sprintf(p + len, "status:\t\tsupported\n");
5319
5320 if (led_supported == TPACPI_LED_570) {
5321 /* 570 */
5322 int i, status;
5323 for (i = 0; i < 8; i++) {
5324 status = led_get_status(i);
5325 if (status < 0)
5326 return -EIO;
5327 len += sprintf(p + len, "%d:\t\t%s\n",
5328 i, str_led_status(status));
5329 }
5330 }
5331
5332 len += sprintf(p + len, "commands:\t"
5333 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5334
5335 return len;
5336 }
5337
5338 static int led_write(char *buf)
5339 {
5340 char *cmd;
5341 int led, rc;
5342 enum led_status_t s;
5343
5344 if (!led_supported)
5345 return -ENODEV;
5346
5347 while ((cmd = next_cmd(&buf))) {
5348 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5349 return -EINVAL;
5350
5351 if (strstr(cmd, "off")) {
5352 s = TPACPI_LED_OFF;
5353 } else if (strstr(cmd, "on")) {
5354 s = TPACPI_LED_ON;
5355 } else if (strstr(cmd, "blink")) {
5356 s = TPACPI_LED_BLINK;
5357 } else {
5358 return -EINVAL;
5359 }
5360
5361 rc = led_set_status(led, s);
5362 if (rc < 0)
5363 return rc;
5364 }
5365
5366 return 0;
5367 }
5368
5369 static struct ibm_struct led_driver_data = {
5370 .name = "led",
5371 .read = led_read,
5372 .write = led_write,
5373 .exit = led_exit,
5374 };
5375
5376 /*************************************************************************
5377 * Beep subdriver
5378 */
5379
5380 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5381
5382 #define TPACPI_BEEP_Q1 0x0001
5383
5384 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5385 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5386 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5387 };
5388
5389 static int __init beep_init(struct ibm_init_struct *iibm)
5390 {
5391 unsigned long quirks;
5392
5393 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5394
5395 TPACPI_ACPIHANDLE_INIT(beep);
5396
5397 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5398 str_supported(beep_handle != NULL));
5399
5400 quirks = tpacpi_check_quirks(beep_quirk_table,
5401 ARRAY_SIZE(beep_quirk_table));
5402
5403 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5404
5405 return (beep_handle)? 0 : 1;
5406 }
5407
5408 static int beep_read(char *p)
5409 {
5410 int len = 0;
5411
5412 if (!beep_handle)
5413 len += sprintf(p + len, "status:\t\tnot supported\n");
5414 else {
5415 len += sprintf(p + len, "status:\t\tsupported\n");
5416 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5417 }
5418
5419 return len;
5420 }
5421
5422 static int beep_write(char *buf)
5423 {
5424 char *cmd;
5425 int beep_cmd;
5426
5427 if (!beep_handle)
5428 return -ENODEV;
5429
5430 while ((cmd = next_cmd(&buf))) {
5431 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5432 beep_cmd >= 0 && beep_cmd <= 17) {
5433 /* beep_cmd set */
5434 } else
5435 return -EINVAL;
5436 if (tp_features.beep_needs_two_args) {
5437 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5438 beep_cmd, 0))
5439 return -EIO;
5440 } else {
5441 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5442 beep_cmd))
5443 return -EIO;
5444 }
5445 }
5446
5447 return 0;
5448 }
5449
5450 static struct ibm_struct beep_driver_data = {
5451 .name = "beep",
5452 .read = beep_read,
5453 .write = beep_write,
5454 };
5455
5456 /*************************************************************************
5457 * Thermal subdriver
5458 */
5459
5460 enum thermal_access_mode {
5461 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5462 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5463 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5464 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5465 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5466 };
5467
5468 enum { /* TPACPI_THERMAL_TPEC_* */
5469 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5470 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5471 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5472 };
5473
5474 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5475 struct ibm_thermal_sensors_struct {
5476 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5477 };
5478
5479 static enum thermal_access_mode thermal_read_mode;
5480
5481 /* idx is zero-based */
5482 static int thermal_get_sensor(int idx, s32 *value)
5483 {
5484 int t;
5485 s8 tmp;
5486 char tmpi[5];
5487
5488 t = TP_EC_THERMAL_TMP0;
5489
5490 switch (thermal_read_mode) {
5491 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5492 case TPACPI_THERMAL_TPEC_16:
5493 if (idx >= 8 && idx <= 15) {
5494 t = TP_EC_THERMAL_TMP8;
5495 idx -= 8;
5496 }
5497 /* fallthrough */
5498 #endif
5499 case TPACPI_THERMAL_TPEC_8:
5500 if (idx <= 7) {
5501 if (!acpi_ec_read(t + idx, &tmp))
5502 return -EIO;
5503 *value = tmp * 1000;
5504 return 0;
5505 }
5506 break;
5507
5508 case TPACPI_THERMAL_ACPI_UPDT:
5509 if (idx <= 7) {
5510 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5511 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5512 return -EIO;
5513 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5514 return -EIO;
5515 *value = (t - 2732) * 100;
5516 return 0;
5517 }
5518 break;
5519
5520 case TPACPI_THERMAL_ACPI_TMP07:
5521 if (idx <= 7) {
5522 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5523 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5524 return -EIO;
5525 if (t > 127 || t < -127)
5526 t = TP_EC_THERMAL_TMP_NA;
5527 *value = t * 1000;
5528 return 0;
5529 }
5530 break;
5531
5532 case TPACPI_THERMAL_NONE:
5533 default:
5534 return -ENOSYS;
5535 }
5536
5537 return -EINVAL;
5538 }
5539
5540 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5541 {
5542 int res, i;
5543 int n;
5544
5545 n = 8;
5546 i = 0;
5547
5548 if (!s)
5549 return -EINVAL;
5550
5551 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5552 n = 16;
5553
5554 for (i = 0 ; i < n; i++) {
5555 res = thermal_get_sensor(i, &s->temp[i]);
5556 if (res)
5557 return res;
5558 }
5559
5560 return n;
5561 }
5562
5563 /* sysfs temp##_input -------------------------------------------------- */
5564
5565 static ssize_t thermal_temp_input_show(struct device *dev,
5566 struct device_attribute *attr,
5567 char *buf)
5568 {
5569 struct sensor_device_attribute *sensor_attr =
5570 to_sensor_dev_attr(attr);
5571 int idx = sensor_attr->index;
5572 s32 value;
5573 int res;
5574
5575 res = thermal_get_sensor(idx, &value);
5576 if (res)
5577 return res;
5578 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5579 return -ENXIO;
5580
5581 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5582 }
5583
5584 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5585 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5586 thermal_temp_input_show, NULL, _idxB)
5587
5588 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5589 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5590 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5591 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5592 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5593 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5594 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5595 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5596 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5597 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5598 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5599 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5600 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5601 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5602 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5603 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5604 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5605 };
5606
5607 #define THERMAL_ATTRS(X) \
5608 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5609
5610 static struct attribute *thermal_temp_input_attr[] = {
5611 THERMAL_ATTRS(8),
5612 THERMAL_ATTRS(9),
5613 THERMAL_ATTRS(10),
5614 THERMAL_ATTRS(11),
5615 THERMAL_ATTRS(12),
5616 THERMAL_ATTRS(13),
5617 THERMAL_ATTRS(14),
5618 THERMAL_ATTRS(15),
5619 THERMAL_ATTRS(0),
5620 THERMAL_ATTRS(1),
5621 THERMAL_ATTRS(2),
5622 THERMAL_ATTRS(3),
5623 THERMAL_ATTRS(4),
5624 THERMAL_ATTRS(5),
5625 THERMAL_ATTRS(6),
5626 THERMAL_ATTRS(7),
5627 NULL
5628 };
5629
5630 static const struct attribute_group thermal_temp_input16_group = {
5631 .attrs = thermal_temp_input_attr
5632 };
5633
5634 static const struct attribute_group thermal_temp_input8_group = {
5635 .attrs = &thermal_temp_input_attr[8]
5636 };
5637
5638 #undef THERMAL_SENSOR_ATTR_TEMP
5639 #undef THERMAL_ATTRS
5640
5641 /* --------------------------------------------------------------------- */
5642
5643 static int __init thermal_init(struct ibm_init_struct *iibm)
5644 {
5645 u8 t, ta1, ta2;
5646 int i;
5647 int acpi_tmp7;
5648 int res;
5649
5650 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5651
5652 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5653
5654 if (thinkpad_id.ec_model) {
5655 /*
5656 * Direct EC access mode: sensors at registers
5657 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5658 * non-implemented, thermal sensors return 0x80 when
5659 * not available
5660 */
5661
5662 ta1 = ta2 = 0;
5663 for (i = 0; i < 8; i++) {
5664 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5665 ta1 |= t;
5666 } else {
5667 ta1 = 0;
5668 break;
5669 }
5670 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5671 ta2 |= t;
5672 } else {
5673 ta1 = 0;
5674 break;
5675 }
5676 }
5677 if (ta1 == 0) {
5678 /* This is sheer paranoia, but we handle it anyway */
5679 if (acpi_tmp7) {
5680 printk(TPACPI_ERR
5681 "ThinkPad ACPI EC access misbehaving, "
5682 "falling back to ACPI TMPx access "
5683 "mode\n");
5684 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5685 } else {
5686 printk(TPACPI_ERR
5687 "ThinkPad ACPI EC access misbehaving, "
5688 "disabling thermal sensors access\n");
5689 thermal_read_mode = TPACPI_THERMAL_NONE;
5690 }
5691 } else {
5692 thermal_read_mode =
5693 (ta2 != 0) ?
5694 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5695 }
5696 } else if (acpi_tmp7) {
5697 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5698 /* 600e/x, 770e, 770x */
5699 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5700 } else {
5701 /* Standard ACPI TMPx access, max 8 sensors */
5702 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5703 }
5704 } else {
5705 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5706 thermal_read_mode = TPACPI_THERMAL_NONE;
5707 }
5708
5709 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5710 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5711 thermal_read_mode);
5712
5713 switch (thermal_read_mode) {
5714 case TPACPI_THERMAL_TPEC_16:
5715 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5716 &thermal_temp_input16_group);
5717 if (res)
5718 return res;
5719 break;
5720 case TPACPI_THERMAL_TPEC_8:
5721 case TPACPI_THERMAL_ACPI_TMP07:
5722 case TPACPI_THERMAL_ACPI_UPDT:
5723 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5724 &thermal_temp_input8_group);
5725 if (res)
5726 return res;
5727 break;
5728 case TPACPI_THERMAL_NONE:
5729 default:
5730 return 1;
5731 }
5732
5733 return 0;
5734 }
5735
5736 static void thermal_exit(void)
5737 {
5738 switch (thermal_read_mode) {
5739 case TPACPI_THERMAL_TPEC_16:
5740 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5741 &thermal_temp_input16_group);
5742 break;
5743 case TPACPI_THERMAL_TPEC_8:
5744 case TPACPI_THERMAL_ACPI_TMP07:
5745 case TPACPI_THERMAL_ACPI_UPDT:
5746 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5747 &thermal_temp_input16_group);
5748 break;
5749 case TPACPI_THERMAL_NONE:
5750 default:
5751 break;
5752 }
5753 }
5754
5755 static int thermal_read(char *p)
5756 {
5757 int len = 0;
5758 int n, i;
5759 struct ibm_thermal_sensors_struct t;
5760
5761 n = thermal_get_sensors(&t);
5762 if (unlikely(n < 0))
5763 return n;
5764
5765 len += sprintf(p + len, "temperatures:\t");
5766
5767 if (n > 0) {
5768 for (i = 0; i < (n - 1); i++)
5769 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5770 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5771 } else
5772 len += sprintf(p + len, "not supported\n");
5773
5774 return len;
5775 }
5776
5777 static struct ibm_struct thermal_driver_data = {
5778 .name = "thermal",
5779 .read = thermal_read,
5780 .exit = thermal_exit,
5781 };
5782
5783 /*************************************************************************
5784 * EC Dump subdriver
5785 */
5786
5787 static u8 ecdump_regs[256];
5788
5789 static int ecdump_read(char *p)
5790 {
5791 int len = 0;
5792 int i, j;
5793 u8 v;
5794
5795 len += sprintf(p + len, "EC "
5796 " +00 +01 +02 +03 +04 +05 +06 +07"
5797 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5798 for (i = 0; i < 256; i += 16) {
5799 len += sprintf(p + len, "EC 0x%02x:", i);
5800 for (j = 0; j < 16; j++) {
5801 if (!acpi_ec_read(i + j, &v))
5802 break;
5803 if (v != ecdump_regs[i + j])
5804 len += sprintf(p + len, " *%02x", v);
5805 else
5806 len += sprintf(p + len, " %02x", v);
5807 ecdump_regs[i + j] = v;
5808 }
5809 len += sprintf(p + len, "\n");
5810 if (j != 16)
5811 break;
5812 }
5813
5814 /* These are way too dangerous to advertise openly... */
5815 #if 0
5816 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5817 " (<offset> is 00-ff, <value> is 00-ff)\n");
5818 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5819 " (<offset> is 00-ff, <value> is 0-255)\n");
5820 #endif
5821 return len;
5822 }
5823
5824 static int ecdump_write(char *buf)
5825 {
5826 char *cmd;
5827 int i, v;
5828
5829 while ((cmd = next_cmd(&buf))) {
5830 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5831 /* i and v set */
5832 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5833 /* i and v set */
5834 } else
5835 return -EINVAL;
5836 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5837 if (!acpi_ec_write(i, v))
5838 return -EIO;
5839 } else
5840 return -EINVAL;
5841 }
5842
5843 return 0;
5844 }
5845
5846 static struct ibm_struct ecdump_driver_data = {
5847 .name = "ecdump",
5848 .read = ecdump_read,
5849 .write = ecdump_write,
5850 .flags.experimental = 1,
5851 };
5852
5853 /*************************************************************************
5854 * Backlight/brightness subdriver
5855 */
5856
5857 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5858
5859 /*
5860 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5861 * CMOS NVRAM byte 0x5E, bits 0-3.
5862 *
5863 * EC HBRV (0x31) has the following layout
5864 * Bit 7: unknown function
5865 * Bit 6: unknown function
5866 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5867 * Bit 4: must be set to zero to avoid problems
5868 * Bit 3-0: backlight brightness level
5869 *
5870 * brightness_get_raw returns status data in the HBRV layout
5871 *
5872 * WARNING: The X61 has been verified to use HBRV for something else, so
5873 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5874 * testing on the very early *60 Lenovo models...
5875 */
5876
5877 enum {
5878 TP_EC_BACKLIGHT = 0x31,
5879
5880 /* TP_EC_BACKLIGHT bitmasks */
5881 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5882 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5883 TP_EC_BACKLIGHT_MAPSW = 0x20,
5884 };
5885
5886 enum tpacpi_brightness_access_mode {
5887 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5888 TPACPI_BRGHT_MODE_EC, /* EC control */
5889 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5890 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5891 TPACPI_BRGHT_MODE_MAX
5892 };
5893
5894 static struct backlight_device *ibm_backlight_device;
5895
5896 static enum tpacpi_brightness_access_mode brightness_mode =
5897 TPACPI_BRGHT_MODE_MAX;
5898
5899 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5900
5901 static struct mutex brightness_mutex;
5902
5903 /* NVRAM brightness access,
5904 * call with brightness_mutex held! */
5905 static unsigned int tpacpi_brightness_nvram_get(void)
5906 {
5907 u8 lnvram;
5908
5909 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5910 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5911 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5912 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5913
5914 return lnvram;
5915 }
5916
5917 static void tpacpi_brightness_checkpoint_nvram(void)
5918 {
5919 u8 lec = 0;
5920 u8 b_nvram;
5921
5922 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5923 return;
5924
5925 vdbg_printk(TPACPI_DBG_BRGHT,
5926 "trying to checkpoint backlight level to NVRAM...\n");
5927
5928 if (mutex_lock_killable(&brightness_mutex) < 0)
5929 return;
5930
5931 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5932 goto unlock;
5933 lec &= TP_EC_BACKLIGHT_LVLMSK;
5934 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5935
5936 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5937 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5938 /* NVRAM needs update */
5939 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5940 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5941 b_nvram |= lec;
5942 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5943 dbg_printk(TPACPI_DBG_BRGHT,
5944 "updated NVRAM backlight level to %u (0x%02x)\n",
5945 (unsigned int) lec, (unsigned int) b_nvram);
5946 } else
5947 vdbg_printk(TPACPI_DBG_BRGHT,
5948 "NVRAM backlight level already is %u (0x%02x)\n",
5949 (unsigned int) lec, (unsigned int) b_nvram);
5950
5951 unlock:
5952 mutex_unlock(&brightness_mutex);
5953 }
5954
5955
5956 /* call with brightness_mutex held! */
5957 static int tpacpi_brightness_get_raw(int *status)
5958 {
5959 u8 lec = 0;
5960
5961 switch (brightness_mode) {
5962 case TPACPI_BRGHT_MODE_UCMS_STEP:
5963 *status = tpacpi_brightness_nvram_get();
5964 return 0;
5965 case TPACPI_BRGHT_MODE_EC:
5966 case TPACPI_BRGHT_MODE_ECNVRAM:
5967 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5968 return -EIO;
5969 *status = lec;
5970 return 0;
5971 default:
5972 return -ENXIO;
5973 }
5974 }
5975
5976 /* call with brightness_mutex held! */
5977 /* do NOT call with illegal backlight level value */
5978 static int tpacpi_brightness_set_ec(unsigned int value)
5979 {
5980 u8 lec = 0;
5981
5982 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5983 return -EIO;
5984
5985 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5986 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5987 (value & TP_EC_BACKLIGHT_LVLMSK))))
5988 return -EIO;
5989
5990 return 0;
5991 }
5992
5993 /* call with brightness_mutex held! */
5994 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5995 {
5996 int cmos_cmd, inc;
5997 unsigned int current_value, i;
5998
5999 current_value = tpacpi_brightness_nvram_get();
6000
6001 if (value == current_value)
6002 return 0;
6003
6004 cmos_cmd = (value > current_value) ?
6005 TP_CMOS_BRIGHTNESS_UP :
6006 TP_CMOS_BRIGHTNESS_DOWN;
6007 inc = (value > current_value) ? 1 : -1;
6008
6009 for (i = current_value; i != value; i += inc)
6010 if (issue_thinkpad_cmos_command(cmos_cmd))
6011 return -EIO;
6012
6013 return 0;
6014 }
6015
6016 /* May return EINTR which can always be mapped to ERESTARTSYS */
6017 static int brightness_set(unsigned int value)
6018 {
6019 int res;
6020
6021 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6022 value < 0)
6023 return -EINVAL;
6024
6025 vdbg_printk(TPACPI_DBG_BRGHT,
6026 "set backlight level to %d\n", value);
6027
6028 res = mutex_lock_killable(&brightness_mutex);
6029 if (res < 0)
6030 return res;
6031
6032 switch (brightness_mode) {
6033 case TPACPI_BRGHT_MODE_EC:
6034 case TPACPI_BRGHT_MODE_ECNVRAM:
6035 res = tpacpi_brightness_set_ec(value);
6036 break;
6037 case TPACPI_BRGHT_MODE_UCMS_STEP:
6038 res = tpacpi_brightness_set_ucmsstep(value);
6039 break;
6040 default:
6041 res = -ENXIO;
6042 }
6043
6044 mutex_unlock(&brightness_mutex);
6045 return res;
6046 }
6047
6048 /* sysfs backlight class ----------------------------------------------- */
6049
6050 static int brightness_update_status(struct backlight_device *bd)
6051 {
6052 unsigned int level =
6053 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6054 bd->props.power == FB_BLANK_UNBLANK) ?
6055 bd->props.brightness : 0;
6056
6057 dbg_printk(TPACPI_DBG_BRGHT,
6058 "backlight: attempt to set level to %d\n",
6059 level);
6060
6061 /* it is the backlight class's job (caller) to handle
6062 * EINTR and other errors properly */
6063 return brightness_set(level);
6064 }
6065
6066 static int brightness_get(struct backlight_device *bd)
6067 {
6068 int status, res;
6069
6070 res = mutex_lock_killable(&brightness_mutex);
6071 if (res < 0)
6072 return 0;
6073
6074 res = tpacpi_brightness_get_raw(&status);
6075
6076 mutex_unlock(&brightness_mutex);
6077
6078 if (res < 0)
6079 return 0;
6080
6081 return status & TP_EC_BACKLIGHT_LVLMSK;
6082 }
6083
6084 static struct backlight_ops ibm_backlight_data = {
6085 .get_brightness = brightness_get,
6086 .update_status = brightness_update_status,
6087 };
6088
6089 /* --------------------------------------------------------------------- */
6090
6091 /*
6092 * These are only useful for models that have only one possibility
6093 * of GPU. If the BIOS model handles both ATI and Intel, don't use
6094 * these quirks.
6095 */
6096 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
6097 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
6098 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
6099
6100 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6101 /* Models with ATI GPUs known to require ECNVRAM mode */
6102 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
6103
6104 /* Models with ATI GPUs that can use ECNVRAM */
6105 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6106 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6107 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6108 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6109
6110 /* Models with Intel Extreme Graphics 2 */
6111 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6112 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
6113 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
6114
6115 /* Models with Intel GMA900 */
6116 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
6117 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
6118 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
6119 };
6120
6121 static int __init brightness_init(struct ibm_init_struct *iibm)
6122 {
6123 int b;
6124 unsigned long quirks;
6125
6126 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6127
6128 mutex_init(&brightness_mutex);
6129
6130 quirks = tpacpi_check_quirks(brightness_quirk_table,
6131 ARRAY_SIZE(brightness_quirk_table));
6132
6133 /*
6134 * We always attempt to detect acpi support, so as to switch
6135 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6136 * going to publish a backlight interface
6137 */
6138 b = tpacpi_check_std_acpi_brightness_support();
6139 if (b > 0) {
6140
6141 if (acpi_video_backlight_support()) {
6142 if (brightness_enable > 1) {
6143 printk(TPACPI_NOTICE
6144 "Standard ACPI backlight interface "
6145 "available, not loading native one.\n");
6146 return 1;
6147 } else if (brightness_enable == 1) {
6148 printk(TPACPI_NOTICE
6149 "Backlight control force enabled, even if standard "
6150 "ACPI backlight interface is available\n");
6151 }
6152 } else {
6153 if (brightness_enable > 1) {
6154 printk(TPACPI_NOTICE
6155 "Standard ACPI backlight interface not "
6156 "available, thinkpad_acpi native "
6157 "brightness control enabled\n");
6158 }
6159 }
6160 }
6161
6162 if (!brightness_enable) {
6163 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6164 "brightness support disabled by "
6165 "module parameter\n");
6166 return 1;
6167 }
6168
6169 if (b > 16) {
6170 printk(TPACPI_ERR
6171 "Unsupported brightness interface, "
6172 "please contact %s\n", TPACPI_MAIL);
6173 return 1;
6174 }
6175 if (b == 16)
6176 tp_features.bright_16levels = 1;
6177
6178 /*
6179 * Check for module parameter bogosity, note that we
6180 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6181 * able to detect "unspecified"
6182 */
6183 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6184 return -EINVAL;
6185
6186 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6187 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6188 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6189 if (quirks & TPACPI_BRGHT_Q_EC)
6190 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6191 else
6192 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6193
6194 dbg_printk(TPACPI_DBG_BRGHT,
6195 "driver auto-selected brightness_mode=%d\n",
6196 brightness_mode);
6197 }
6198
6199 /* Safety */
6200 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6201 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6202 brightness_mode == TPACPI_BRGHT_MODE_EC))
6203 return -EINVAL;
6204
6205 if (tpacpi_brightness_get_raw(&b) < 0)
6206 return 1;
6207
6208 if (tp_features.bright_16levels)
6209 printk(TPACPI_INFO
6210 "detected a 16-level brightness capable ThinkPad\n");
6211
6212 ibm_backlight_device = backlight_device_register(
6213 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6214 &ibm_backlight_data);
6215 if (IS_ERR(ibm_backlight_device)) {
6216 int rc = PTR_ERR(ibm_backlight_device);
6217 ibm_backlight_device = NULL;
6218 printk(TPACPI_ERR "Could not register backlight device\n");
6219 return rc;
6220 }
6221 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6222 "brightness is supported\n");
6223
6224 if (quirks & TPACPI_BRGHT_Q_ASK) {
6225 printk(TPACPI_NOTICE
6226 "brightness: will use unverified default: "
6227 "brightness_mode=%d\n", brightness_mode);
6228 printk(TPACPI_NOTICE
6229 "brightness: please report to %s whether it works well "
6230 "or not on your ThinkPad\n", TPACPI_MAIL);
6231 }
6232
6233 ibm_backlight_device->props.max_brightness =
6234 (tp_features.bright_16levels)? 15 : 7;
6235 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6236 backlight_update_status(ibm_backlight_device);
6237
6238 return 0;
6239 }
6240
6241 static void brightness_suspend(pm_message_t state)
6242 {
6243 tpacpi_brightness_checkpoint_nvram();
6244 }
6245
6246 static void brightness_shutdown(void)
6247 {
6248 tpacpi_brightness_checkpoint_nvram();
6249 }
6250
6251 static void brightness_exit(void)
6252 {
6253 if (ibm_backlight_device) {
6254 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6255 "calling backlight_device_unregister()\n");
6256 backlight_device_unregister(ibm_backlight_device);
6257 }
6258
6259 tpacpi_brightness_checkpoint_nvram();
6260 }
6261
6262 static int brightness_read(char *p)
6263 {
6264 int len = 0;
6265 int level;
6266
6267 level = brightness_get(NULL);
6268 if (level < 0) {
6269 len += sprintf(p + len, "level:\t\tunreadable\n");
6270 } else {
6271 len += sprintf(p + len, "level:\t\t%d\n", level);
6272 len += sprintf(p + len, "commands:\tup, down\n");
6273 len += sprintf(p + len, "commands:\tlevel <level>"
6274 " (<level> is 0-%d)\n",
6275 (tp_features.bright_16levels) ? 15 : 7);
6276 }
6277
6278 return len;
6279 }
6280
6281 static int brightness_write(char *buf)
6282 {
6283 int level;
6284 int rc;
6285 char *cmd;
6286 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6287
6288 level = brightness_get(NULL);
6289 if (level < 0)
6290 return level;
6291
6292 while ((cmd = next_cmd(&buf))) {
6293 if (strlencmp(cmd, "up") == 0) {
6294 if (level < max_level)
6295 level++;
6296 } else if (strlencmp(cmd, "down") == 0) {
6297 if (level > 0)
6298 level--;
6299 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6300 level >= 0 && level <= max_level) {
6301 /* new level set */
6302 } else
6303 return -EINVAL;
6304 }
6305
6306 tpacpi_disclose_usertask("procfs brightness",
6307 "set level to %d\n", level);
6308
6309 /*
6310 * Now we know what the final level should be, so we try to set it.
6311 * Doing it this way makes the syscall restartable in case of EINTR
6312 */
6313 rc = brightness_set(level);
6314 return (rc == -EINTR)? ERESTARTSYS : rc;
6315 }
6316
6317 static struct ibm_struct brightness_driver_data = {
6318 .name = "brightness",
6319 .read = brightness_read,
6320 .write = brightness_write,
6321 .exit = brightness_exit,
6322 .suspend = brightness_suspend,
6323 .shutdown = brightness_shutdown,
6324 };
6325
6326 /*************************************************************************
6327 * Volume subdriver
6328 */
6329
6330 static int volume_offset = 0x30;
6331
6332 static int volume_read(char *p)
6333 {
6334 int len = 0;
6335 u8 level;
6336
6337 if (!acpi_ec_read(volume_offset, &level)) {
6338 len += sprintf(p + len, "level:\t\tunreadable\n");
6339 } else {
6340 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6341 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6342 len += sprintf(p + len, "commands:\tup, down, mute\n");
6343 len += sprintf(p + len, "commands:\tlevel <level>"
6344 " (<level> is 0-15)\n");
6345 }
6346
6347 return len;
6348 }
6349
6350 static int volume_write(char *buf)
6351 {
6352 int cmos_cmd, inc, i;
6353 u8 level, mute;
6354 int new_level, new_mute;
6355 char *cmd;
6356
6357 while ((cmd = next_cmd(&buf))) {
6358 if (!acpi_ec_read(volume_offset, &level))
6359 return -EIO;
6360 new_mute = mute = level & 0x40;
6361 new_level = level = level & 0xf;
6362
6363 if (strlencmp(cmd, "up") == 0) {
6364 if (mute)
6365 new_mute = 0;
6366 else
6367 new_level = level == 15 ? 15 : level + 1;
6368 } else if (strlencmp(cmd, "down") == 0) {
6369 if (mute)
6370 new_mute = 0;
6371 else
6372 new_level = level == 0 ? 0 : level - 1;
6373 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6374 new_level >= 0 && new_level <= 15) {
6375 /* new_level set */
6376 } else if (strlencmp(cmd, "mute") == 0) {
6377 new_mute = 0x40;
6378 } else
6379 return -EINVAL;
6380
6381 if (new_level != level) {
6382 /* mute doesn't change */
6383
6384 cmos_cmd = (new_level > level) ?
6385 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6386 inc = new_level > level ? 1 : -1;
6387
6388 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6389 !acpi_ec_write(volume_offset, level)))
6390 return -EIO;
6391
6392 for (i = level; i != new_level; i += inc)
6393 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6394 !acpi_ec_write(volume_offset, i + inc))
6395 return -EIO;
6396
6397 if (mute &&
6398 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6399 !acpi_ec_write(volume_offset, new_level + mute))) {
6400 return -EIO;
6401 }
6402 }
6403
6404 if (new_mute != mute) {
6405 /* level doesn't change */
6406
6407 cmos_cmd = (new_mute) ?
6408 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6409
6410 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6411 !acpi_ec_write(volume_offset, level + new_mute))
6412 return -EIO;
6413 }
6414 }
6415
6416 return 0;
6417 }
6418
6419 static struct ibm_struct volume_driver_data = {
6420 .name = "volume",
6421 .read = volume_read,
6422 .write = volume_write,
6423 };
6424
6425 /*************************************************************************
6426 * Fan subdriver
6427 */
6428
6429 /*
6430 * FAN ACCESS MODES
6431 *
6432 * TPACPI_FAN_RD_ACPI_GFAN:
6433 * ACPI GFAN method: returns fan level
6434 *
6435 * see TPACPI_FAN_WR_ACPI_SFAN
6436 * EC 0x2f (HFSP) not available if GFAN exists
6437 *
6438 * TPACPI_FAN_WR_ACPI_SFAN:
6439 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6440 *
6441 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6442 * it for writing.
6443 *
6444 * TPACPI_FAN_WR_TPEC:
6445 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6446 * Supported on almost all ThinkPads
6447 *
6448 * Fan speed changes of any sort (including those caused by the
6449 * disengaged mode) are usually done slowly by the firmware as the
6450 * maximum ammount of fan duty cycle change per second seems to be
6451 * limited.
6452 *
6453 * Reading is not available if GFAN exists.
6454 * Writing is not available if SFAN exists.
6455 *
6456 * Bits
6457 * 7 automatic mode engaged;
6458 * (default operation mode of the ThinkPad)
6459 * fan level is ignored in this mode.
6460 * 6 full speed mode (takes precedence over bit 7);
6461 * not available on all thinkpads. May disable
6462 * the tachometer while the fan controller ramps up
6463 * the speed (which can take up to a few *minutes*).
6464 * Speeds up fan to 100% duty-cycle, which is far above
6465 * the standard RPM levels. It is not impossible that
6466 * it could cause hardware damage.
6467 * 5-3 unused in some models. Extra bits for fan level
6468 * in others, but still useless as all values above
6469 * 7 map to the same speed as level 7 in these models.
6470 * 2-0 fan level (0..7 usually)
6471 * 0x00 = stop
6472 * 0x07 = max (set when temperatures critical)
6473 * Some ThinkPads may have other levels, see
6474 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6475 *
6476 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6477 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6478 * does so, its initial value is meaningless (0x07).
6479 *
6480 * For firmware bugs, refer to:
6481 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6482 *
6483 * ----
6484 *
6485 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6486 * Main fan tachometer reading (in RPM)
6487 *
6488 * This register is present on all ThinkPads with a new-style EC, and
6489 * it is known not to be present on the A21m/e, and T22, as there is
6490 * something else in offset 0x84 according to the ACPI DSDT. Other
6491 * ThinkPads from this same time period (and earlier) probably lack the
6492 * tachometer as well.
6493 *
6494 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6495 * was never fixed by IBM to report the EC firmware version string
6496 * probably support the tachometer (like the early X models), so
6497 * detecting it is quite hard. We need more data to know for sure.
6498 *
6499 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6500 * might result.
6501 *
6502 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6503 * mode.
6504 *
6505 * For firmware bugs, refer to:
6506 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6507 *
6508 * ----
6509 *
6510 * ThinkPad EC register 0x31 bit 0 (only on select models)
6511 *
6512 * When bit 0 of EC register 0x31 is zero, the tachometer registers
6513 * show the speed of the main fan. When bit 0 of EC register 0x31
6514 * is one, the tachometer registers show the speed of the auxiliary
6515 * fan.
6516 *
6517 * Fan control seems to affect both fans, regardless of the state
6518 * of this bit.
6519 *
6520 * So far, only the firmware for the X60/X61 non-tablet versions
6521 * seem to support this (firmware TP-7M).
6522 *
6523 * TPACPI_FAN_WR_ACPI_FANS:
6524 * ThinkPad X31, X40, X41. Not available in the X60.
6525 *
6526 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6527 * high speed. ACPI DSDT seems to map these three speeds to levels
6528 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6529 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6530 *
6531 * The speeds are stored on handles
6532 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6533 *
6534 * There are three default speed sets, acessible as handles:
6535 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6536 *
6537 * ACPI DSDT switches which set is in use depending on various
6538 * factors.
6539 *
6540 * TPACPI_FAN_WR_TPEC is also available and should be used to
6541 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6542 * but the ACPI tables just mention level 7.
6543 */
6544
6545 enum { /* Fan control constants */
6546 fan_status_offset = 0x2f, /* EC register 0x2f */
6547 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6548 * 0x84 must be read before 0x85 */
6549 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
6550 bit 0 selects which fan is active */
6551
6552 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6553 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6554
6555 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6556 };
6557
6558 enum fan_status_access_mode {
6559 TPACPI_FAN_NONE = 0, /* No fan status or control */
6560 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6561 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6562 };
6563
6564 enum fan_control_access_mode {
6565 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6566 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6567 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6568 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6569 };
6570
6571 enum fan_control_commands {
6572 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6573 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6574 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6575 * and also watchdog cmd */
6576 };
6577
6578 static int fan_control_allowed;
6579
6580 static enum fan_status_access_mode fan_status_access_mode;
6581 static enum fan_control_access_mode fan_control_access_mode;
6582 static enum fan_control_commands fan_control_commands;
6583
6584 static u8 fan_control_initial_status;
6585 static u8 fan_control_desired_level;
6586 static u8 fan_control_resume_level;
6587 static int fan_watchdog_maxinterval;
6588
6589 static struct mutex fan_mutex;
6590
6591 static void fan_watchdog_fire(struct work_struct *ignored);
6592 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6593
6594 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6595 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6596 "\\FSPD", /* 600e/x, 770e, 770x */
6597 ); /* all others */
6598 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6599 "JFNS", /* 770x-JL */
6600 ); /* all others */
6601
6602 /*
6603 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6604 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6605 * be in auto mode (0x80).
6606 *
6607 * This is corrected by any write to HFSP either by the driver, or
6608 * by the firmware.
6609 *
6610 * We assume 0x07 really means auto mode while this quirk is active,
6611 * as this is far more likely than the ThinkPad being in level 7,
6612 * which is only used by the firmware during thermal emergencies.
6613 *
6614 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6615 * TP-70 (T43, R52), which are known to be buggy.
6616 */
6617
6618 static void fan_quirk1_setup(void)
6619 {
6620 if (fan_control_initial_status == 0x07) {
6621 printk(TPACPI_NOTICE
6622 "fan_init: initial fan status is unknown, "
6623 "assuming it is in auto mode\n");
6624 tp_features.fan_ctrl_status_undef = 1;
6625 }
6626 }
6627
6628 static void fan_quirk1_handle(u8 *fan_status)
6629 {
6630 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6631 if (*fan_status != fan_control_initial_status) {
6632 /* something changed the HFSP regisnter since
6633 * driver init time, so it is not undefined
6634 * anymore */
6635 tp_features.fan_ctrl_status_undef = 0;
6636 } else {
6637 /* Return most likely status. In fact, it
6638 * might be the only possible status */
6639 *fan_status = TP_EC_FAN_AUTO;
6640 }
6641 }
6642 }
6643
6644 /* Select main fan on X60/X61, NOOP on others */
6645 static bool fan_select_fan1(void)
6646 {
6647 if (tp_features.second_fan) {
6648 u8 val;
6649
6650 if (ec_read(fan_select_offset, &val) < 0)
6651 return false;
6652 val &= 0xFEU;
6653 if (ec_write(fan_select_offset, val) < 0)
6654 return false;
6655 }
6656 return true;
6657 }
6658
6659 /* Select secondary fan on X60/X61 */
6660 static bool fan_select_fan2(void)
6661 {
6662 u8 val;
6663
6664 if (!tp_features.second_fan)
6665 return false;
6666
6667 if (ec_read(fan_select_offset, &val) < 0)
6668 return false;
6669 val |= 0x01U;
6670 if (ec_write(fan_select_offset, val) < 0)
6671 return false;
6672
6673 return true;
6674 }
6675
6676 /*
6677 * Call with fan_mutex held
6678 */
6679 static void fan_update_desired_level(u8 status)
6680 {
6681 if ((status &
6682 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6683 if (status > 7)
6684 fan_control_desired_level = 7;
6685 else
6686 fan_control_desired_level = status;
6687 }
6688 }
6689
6690 static int fan_get_status(u8 *status)
6691 {
6692 u8 s;
6693
6694 /* TODO:
6695 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6696
6697 switch (fan_status_access_mode) {
6698 case TPACPI_FAN_RD_ACPI_GFAN:
6699 /* 570, 600e/x, 770e, 770x */
6700
6701 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6702 return -EIO;
6703
6704 if (likely(status))
6705 *status = s & 0x07;
6706
6707 break;
6708
6709 case TPACPI_FAN_RD_TPEC:
6710 /* all except 570, 600e/x, 770e, 770x */
6711 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6712 return -EIO;
6713
6714 if (likely(status)) {
6715 *status = s;
6716 fan_quirk1_handle(status);
6717 }
6718
6719 break;
6720
6721 default:
6722 return -ENXIO;
6723 }
6724
6725 return 0;
6726 }
6727
6728 static int fan_get_status_safe(u8 *status)
6729 {
6730 int rc;
6731 u8 s;
6732
6733 if (mutex_lock_killable(&fan_mutex))
6734 return -ERESTARTSYS;
6735 rc = fan_get_status(&s);
6736 if (!rc)
6737 fan_update_desired_level(s);
6738 mutex_unlock(&fan_mutex);
6739
6740 if (status)
6741 *status = s;
6742
6743 return rc;
6744 }
6745
6746 static int fan_get_speed(unsigned int *speed)
6747 {
6748 u8 hi, lo;
6749
6750 switch (fan_status_access_mode) {
6751 case TPACPI_FAN_RD_TPEC:
6752 /* all except 570, 600e/x, 770e, 770x */
6753 if (unlikely(!fan_select_fan1()))
6754 return -EIO;
6755 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6756 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6757 return -EIO;
6758
6759 if (likely(speed))
6760 *speed = (hi << 8) | lo;
6761
6762 break;
6763
6764 default:
6765 return -ENXIO;
6766 }
6767
6768 return 0;
6769 }
6770
6771 static int fan2_get_speed(unsigned int *speed)
6772 {
6773 u8 hi, lo;
6774 bool rc;
6775
6776 switch (fan_status_access_mode) {
6777 case TPACPI_FAN_RD_TPEC:
6778 /* all except 570, 600e/x, 770e, 770x */
6779 if (unlikely(!fan_select_fan2()))
6780 return -EIO;
6781 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6782 !acpi_ec_read(fan_rpm_offset + 1, &hi);
6783 fan_select_fan1(); /* play it safe */
6784 if (rc)
6785 return -EIO;
6786
6787 if (likely(speed))
6788 *speed = (hi << 8) | lo;
6789
6790 break;
6791
6792 default:
6793 return -ENXIO;
6794 }
6795
6796 return 0;
6797 }
6798
6799 static int fan_set_level(int level)
6800 {
6801 if (!fan_control_allowed)
6802 return -EPERM;
6803
6804 switch (fan_control_access_mode) {
6805 case TPACPI_FAN_WR_ACPI_SFAN:
6806 if (level >= 0 && level <= 7) {
6807 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6808 return -EIO;
6809 } else
6810 return -EINVAL;
6811 break;
6812
6813 case TPACPI_FAN_WR_ACPI_FANS:
6814 case TPACPI_FAN_WR_TPEC:
6815 if (!(level & TP_EC_FAN_AUTO) &&
6816 !(level & TP_EC_FAN_FULLSPEED) &&
6817 ((level < 0) || (level > 7)))
6818 return -EINVAL;
6819
6820 /* safety net should the EC not support AUTO
6821 * or FULLSPEED mode bits and just ignore them */
6822 if (level & TP_EC_FAN_FULLSPEED)
6823 level |= 7; /* safety min speed 7 */
6824 else if (level & TP_EC_FAN_AUTO)
6825 level |= 4; /* safety min speed 4 */
6826
6827 if (!acpi_ec_write(fan_status_offset, level))
6828 return -EIO;
6829 else
6830 tp_features.fan_ctrl_status_undef = 0;
6831 break;
6832
6833 default:
6834 return -ENXIO;
6835 }
6836
6837 vdbg_printk(TPACPI_DBG_FAN,
6838 "fan control: set fan control register to 0x%02x\n", level);
6839 return 0;
6840 }
6841
6842 static int fan_set_level_safe(int level)
6843 {
6844 int rc;
6845
6846 if (!fan_control_allowed)
6847 return -EPERM;
6848
6849 if (mutex_lock_killable(&fan_mutex))
6850 return -ERESTARTSYS;
6851
6852 if (level == TPACPI_FAN_LAST_LEVEL)
6853 level = fan_control_desired_level;
6854
6855 rc = fan_set_level(level);
6856 if (!rc)
6857 fan_update_desired_level(level);
6858
6859 mutex_unlock(&fan_mutex);
6860 return rc;
6861 }
6862
6863 static int fan_set_enable(void)
6864 {
6865 u8 s;
6866 int rc;
6867
6868 if (!fan_control_allowed)
6869 return -EPERM;
6870
6871 if (mutex_lock_killable(&fan_mutex))
6872 return -ERESTARTSYS;
6873
6874 switch (fan_control_access_mode) {
6875 case TPACPI_FAN_WR_ACPI_FANS:
6876 case TPACPI_FAN_WR_TPEC:
6877 rc = fan_get_status(&s);
6878 if (rc < 0)
6879 break;
6880
6881 /* Don't go out of emergency fan mode */
6882 if (s != 7) {
6883 s &= 0x07;
6884 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6885 }
6886
6887 if (!acpi_ec_write(fan_status_offset, s))
6888 rc = -EIO;
6889 else {
6890 tp_features.fan_ctrl_status_undef = 0;
6891 rc = 0;
6892 }
6893 break;
6894
6895 case TPACPI_FAN_WR_ACPI_SFAN:
6896 rc = fan_get_status(&s);
6897 if (rc < 0)
6898 break;
6899
6900 s &= 0x07;
6901
6902 /* Set fan to at least level 4 */
6903 s |= 4;
6904
6905 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6906 rc = -EIO;
6907 else
6908 rc = 0;
6909 break;
6910
6911 default:
6912 rc = -ENXIO;
6913 }
6914
6915 mutex_unlock(&fan_mutex);
6916
6917 if (!rc)
6918 vdbg_printk(TPACPI_DBG_FAN,
6919 "fan control: set fan control register to 0x%02x\n",
6920 s);
6921 return rc;
6922 }
6923
6924 static int fan_set_disable(void)
6925 {
6926 int rc;
6927
6928 if (!fan_control_allowed)
6929 return -EPERM;
6930
6931 if (mutex_lock_killable(&fan_mutex))
6932 return -ERESTARTSYS;
6933
6934 rc = 0;
6935 switch (fan_control_access_mode) {
6936 case TPACPI_FAN_WR_ACPI_FANS:
6937 case TPACPI_FAN_WR_TPEC:
6938 if (!acpi_ec_write(fan_status_offset, 0x00))
6939 rc = -EIO;
6940 else {
6941 fan_control_desired_level = 0;
6942 tp_features.fan_ctrl_status_undef = 0;
6943 }
6944 break;
6945
6946 case TPACPI_FAN_WR_ACPI_SFAN:
6947 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6948 rc = -EIO;
6949 else
6950 fan_control_desired_level = 0;
6951 break;
6952
6953 default:
6954 rc = -ENXIO;
6955 }
6956
6957 if (!rc)
6958 vdbg_printk(TPACPI_DBG_FAN,
6959 "fan control: set fan control register to 0\n");
6960
6961 mutex_unlock(&fan_mutex);
6962 return rc;
6963 }
6964
6965 static int fan_set_speed(int speed)
6966 {
6967 int rc;
6968
6969 if (!fan_control_allowed)
6970 return -EPERM;
6971
6972 if (mutex_lock_killable(&fan_mutex))
6973 return -ERESTARTSYS;
6974
6975 rc = 0;
6976 switch (fan_control_access_mode) {
6977 case TPACPI_FAN_WR_ACPI_FANS:
6978 if (speed >= 0 && speed <= 65535) {
6979 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6980 speed, speed, speed))
6981 rc = -EIO;
6982 } else
6983 rc = -EINVAL;
6984 break;
6985
6986 default:
6987 rc = -ENXIO;
6988 }
6989
6990 mutex_unlock(&fan_mutex);
6991 return rc;
6992 }
6993
6994 static void fan_watchdog_reset(void)
6995 {
6996 static int fan_watchdog_active;
6997
6998 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6999 return;
7000
7001 if (fan_watchdog_active)
7002 cancel_delayed_work(&fan_watchdog_task);
7003
7004 if (fan_watchdog_maxinterval > 0 &&
7005 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7006 fan_watchdog_active = 1;
7007 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7008 msecs_to_jiffies(fan_watchdog_maxinterval
7009 * 1000))) {
7010 printk(TPACPI_ERR
7011 "failed to queue the fan watchdog, "
7012 "watchdog will not trigger\n");
7013 }
7014 } else
7015 fan_watchdog_active = 0;
7016 }
7017
7018 static void fan_watchdog_fire(struct work_struct *ignored)
7019 {
7020 int rc;
7021
7022 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7023 return;
7024
7025 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7026 rc = fan_set_enable();
7027 if (rc < 0) {
7028 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7029 "will try again later...\n", -rc);
7030 /* reschedule for later */
7031 fan_watchdog_reset();
7032 }
7033 }
7034
7035 /*
7036 * SYSFS fan layout: hwmon compatible (device)
7037 *
7038 * pwm*_enable:
7039 * 0: "disengaged" mode
7040 * 1: manual mode
7041 * 2: native EC "auto" mode (recommended, hardware default)
7042 *
7043 * pwm*: set speed in manual mode, ignored otherwise.
7044 * 0 is level 0; 255 is level 7. Intermediate points done with linear
7045 * interpolation.
7046 *
7047 * fan*_input: tachometer reading, RPM
7048 *
7049 *
7050 * SYSFS fan layout: extensions
7051 *
7052 * fan_watchdog (driver):
7053 * fan watchdog interval in seconds, 0 disables (default), max 120
7054 */
7055
7056 /* sysfs fan pwm1_enable ----------------------------------------------- */
7057 static ssize_t fan_pwm1_enable_show(struct device *dev,
7058 struct device_attribute *attr,
7059 char *buf)
7060 {
7061 int res, mode;
7062 u8 status;
7063
7064 res = fan_get_status_safe(&status);
7065 if (res)
7066 return res;
7067
7068 if (status & TP_EC_FAN_FULLSPEED) {
7069 mode = 0;
7070 } else if (status & TP_EC_FAN_AUTO) {
7071 mode = 2;
7072 } else
7073 mode = 1;
7074
7075 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7076 }
7077
7078 static ssize_t fan_pwm1_enable_store(struct device *dev,
7079 struct device_attribute *attr,
7080 const char *buf, size_t count)
7081 {
7082 unsigned long t;
7083 int res, level;
7084
7085 if (parse_strtoul(buf, 2, &t))
7086 return -EINVAL;
7087
7088 tpacpi_disclose_usertask("hwmon pwm1_enable",
7089 "set fan mode to %lu\n", t);
7090
7091 switch (t) {
7092 case 0:
7093 level = TP_EC_FAN_FULLSPEED;
7094 break;
7095 case 1:
7096 level = TPACPI_FAN_LAST_LEVEL;
7097 break;
7098 case 2:
7099 level = TP_EC_FAN_AUTO;
7100 break;
7101 case 3:
7102 /* reserved for software-controlled auto mode */
7103 return -ENOSYS;
7104 default:
7105 return -EINVAL;
7106 }
7107
7108 res = fan_set_level_safe(level);
7109 if (res == -ENXIO)
7110 return -EINVAL;
7111 else if (res < 0)
7112 return res;
7113
7114 fan_watchdog_reset();
7115
7116 return count;
7117 }
7118
7119 static struct device_attribute dev_attr_fan_pwm1_enable =
7120 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7121 fan_pwm1_enable_show, fan_pwm1_enable_store);
7122
7123 /* sysfs fan pwm1 ------------------------------------------------------ */
7124 static ssize_t fan_pwm1_show(struct device *dev,
7125 struct device_attribute *attr,
7126 char *buf)
7127 {
7128 int res;
7129 u8 status;
7130
7131 res = fan_get_status_safe(&status);
7132 if (res)
7133 return res;
7134
7135 if ((status &
7136 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7137 status = fan_control_desired_level;
7138
7139 if (status > 7)
7140 status = 7;
7141
7142 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7143 }
7144
7145 static ssize_t fan_pwm1_store(struct device *dev,
7146 struct device_attribute *attr,
7147 const char *buf, size_t count)
7148 {
7149 unsigned long s;
7150 int rc;
7151 u8 status, newlevel;
7152
7153 if (parse_strtoul(buf, 255, &s))
7154 return -EINVAL;
7155
7156 tpacpi_disclose_usertask("hwmon pwm1",
7157 "set fan speed to %lu\n", s);
7158
7159 /* scale down from 0-255 to 0-7 */
7160 newlevel = (s >> 5) & 0x07;
7161
7162 if (mutex_lock_killable(&fan_mutex))
7163 return -ERESTARTSYS;
7164
7165 rc = fan_get_status(&status);
7166 if (!rc && (status &
7167 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7168 rc = fan_set_level(newlevel);
7169 if (rc == -ENXIO)
7170 rc = -EINVAL;
7171 else if (!rc) {
7172 fan_update_desired_level(newlevel);
7173 fan_watchdog_reset();
7174 }
7175 }
7176
7177 mutex_unlock(&fan_mutex);
7178 return (rc)? rc : count;
7179 }
7180
7181 static struct device_attribute dev_attr_fan_pwm1 =
7182 __ATTR(pwm1, S_IWUSR | S_IRUGO,
7183 fan_pwm1_show, fan_pwm1_store);
7184
7185 /* sysfs fan fan1_input ------------------------------------------------ */
7186 static ssize_t fan_fan1_input_show(struct device *dev,
7187 struct device_attribute *attr,
7188 char *buf)
7189 {
7190 int res;
7191 unsigned int speed;
7192
7193 res = fan_get_speed(&speed);
7194 if (res < 0)
7195 return res;
7196
7197 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7198 }
7199
7200 static struct device_attribute dev_attr_fan_fan1_input =
7201 __ATTR(fan1_input, S_IRUGO,
7202 fan_fan1_input_show, NULL);
7203
7204 /* sysfs fan fan2_input ------------------------------------------------ */
7205 static ssize_t fan_fan2_input_show(struct device *dev,
7206 struct device_attribute *attr,
7207 char *buf)
7208 {
7209 int res;
7210 unsigned int speed;
7211
7212 res = fan2_get_speed(&speed);
7213 if (res < 0)
7214 return res;
7215
7216 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7217 }
7218
7219 static struct device_attribute dev_attr_fan_fan2_input =
7220 __ATTR(fan2_input, S_IRUGO,
7221 fan_fan2_input_show, NULL);
7222
7223 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7224 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7225 char *buf)
7226 {
7227 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7228 }
7229
7230 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7231 const char *buf, size_t count)
7232 {
7233 unsigned long t;
7234
7235 if (parse_strtoul(buf, 120, &t))
7236 return -EINVAL;
7237
7238 if (!fan_control_allowed)
7239 return -EPERM;
7240
7241 fan_watchdog_maxinterval = t;
7242 fan_watchdog_reset();
7243
7244 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7245
7246 return count;
7247 }
7248
7249 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7250 fan_fan_watchdog_show, fan_fan_watchdog_store);
7251
7252 /* --------------------------------------------------------------------- */
7253 static struct attribute *fan_attributes[] = {
7254 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7255 &dev_attr_fan_fan1_input.attr,
7256 NULL, /* for fan2_input */
7257 NULL
7258 };
7259
7260 static const struct attribute_group fan_attr_group = {
7261 .attrs = fan_attributes,
7262 };
7263
7264 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7265 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7266
7267 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7268 { .vendor = PCI_VENDOR_ID_IBM, \
7269 .bios = TPACPI_MATCH_ANY, \
7270 .ec = TPID(__id1, __id2), \
7271 .quirks = __quirks }
7272
7273 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7274 { .vendor = PCI_VENDOR_ID_LENOVO, \
7275 .bios = TPACPI_MATCH_ANY, \
7276 .ec = TPID(__id1, __id2), \
7277 .quirks = __quirks }
7278
7279 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7280 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7281 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7282 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7283 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7284 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7285 };
7286
7287 #undef TPACPI_FAN_QL
7288 #undef TPACPI_FAN_QI
7289
7290 static int __init fan_init(struct ibm_init_struct *iibm)
7291 {
7292 int rc;
7293 unsigned long quirks;
7294
7295 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7296 "initializing fan subdriver\n");
7297
7298 mutex_init(&fan_mutex);
7299 fan_status_access_mode = TPACPI_FAN_NONE;
7300 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7301 fan_control_commands = 0;
7302 fan_watchdog_maxinterval = 0;
7303 tp_features.fan_ctrl_status_undef = 0;
7304 tp_features.second_fan = 0;
7305 fan_control_desired_level = 7;
7306
7307 TPACPI_ACPIHANDLE_INIT(fans);
7308 TPACPI_ACPIHANDLE_INIT(gfan);
7309 TPACPI_ACPIHANDLE_INIT(sfan);
7310
7311 quirks = tpacpi_check_quirks(fan_quirk_table,
7312 ARRAY_SIZE(fan_quirk_table));
7313
7314 if (gfan_handle) {
7315 /* 570, 600e/x, 770e, 770x */
7316 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7317 } else {
7318 /* all other ThinkPads: note that even old-style
7319 * ThinkPad ECs supports the fan control register */
7320 if (likely(acpi_ec_read(fan_status_offset,
7321 &fan_control_initial_status))) {
7322 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7323 if (quirks & TPACPI_FAN_Q1)
7324 fan_quirk1_setup();
7325 if (quirks & TPACPI_FAN_2FAN) {
7326 tp_features.second_fan = 1;
7327 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7328 "secondary fan support enabled\n");
7329 }
7330 } else {
7331 printk(TPACPI_ERR
7332 "ThinkPad ACPI EC access misbehaving, "
7333 "fan status and control unavailable\n");
7334 return 1;
7335 }
7336 }
7337
7338 if (sfan_handle) {
7339 /* 570, 770x-JL */
7340 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7341 fan_control_commands |=
7342 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7343 } else {
7344 if (!gfan_handle) {
7345 /* gfan without sfan means no fan control */
7346 /* all other models implement TP EC 0x2f control */
7347
7348 if (fans_handle) {
7349 /* X31, X40, X41 */
7350 fan_control_access_mode =
7351 TPACPI_FAN_WR_ACPI_FANS;
7352 fan_control_commands |=
7353 TPACPI_FAN_CMD_SPEED |
7354 TPACPI_FAN_CMD_LEVEL |
7355 TPACPI_FAN_CMD_ENABLE;
7356 } else {
7357 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7358 fan_control_commands |=
7359 TPACPI_FAN_CMD_LEVEL |
7360 TPACPI_FAN_CMD_ENABLE;
7361 }
7362 }
7363 }
7364
7365 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7366 "fan is %s, modes %d, %d\n",
7367 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7368 fan_control_access_mode != TPACPI_FAN_WR_NONE),
7369 fan_status_access_mode, fan_control_access_mode);
7370
7371 /* fan control master switch */
7372 if (!fan_control_allowed) {
7373 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7374 fan_control_commands = 0;
7375 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7376 "fan control features disabled by parameter\n");
7377 }
7378
7379 /* update fan_control_desired_level */
7380 if (fan_status_access_mode != TPACPI_FAN_NONE)
7381 fan_get_status_safe(NULL);
7382
7383 if (fan_status_access_mode != TPACPI_FAN_NONE ||
7384 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7385 if (tp_features.second_fan) {
7386 /* attach second fan tachometer */
7387 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7388 &dev_attr_fan_fan2_input.attr;
7389 }
7390 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7391 &fan_attr_group);
7392 if (rc < 0)
7393 return rc;
7394
7395 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7396 &driver_attr_fan_watchdog);
7397 if (rc < 0) {
7398 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7399 &fan_attr_group);
7400 return rc;
7401 }
7402 return 0;
7403 } else
7404 return 1;
7405 }
7406
7407 static void fan_exit(void)
7408 {
7409 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7410 "cancelling any pending fan watchdog tasks\n");
7411
7412 /* FIXME: can we really do this unconditionally? */
7413 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7414 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7415 &driver_attr_fan_watchdog);
7416
7417 cancel_delayed_work(&fan_watchdog_task);
7418 flush_workqueue(tpacpi_wq);
7419 }
7420
7421 static void fan_suspend(pm_message_t state)
7422 {
7423 int rc;
7424
7425 if (!fan_control_allowed)
7426 return;
7427
7428 /* Store fan status in cache */
7429 fan_control_resume_level = 0;
7430 rc = fan_get_status_safe(&fan_control_resume_level);
7431 if (rc < 0)
7432 printk(TPACPI_NOTICE
7433 "failed to read fan level for later "
7434 "restore during resume: %d\n", rc);
7435
7436 /* if it is undefined, don't attempt to restore it.
7437 * KEEP THIS LAST */
7438 if (tp_features.fan_ctrl_status_undef)
7439 fan_control_resume_level = 0;
7440 }
7441
7442 static void fan_resume(void)
7443 {
7444 u8 current_level = 7;
7445 bool do_set = false;
7446 int rc;
7447
7448 /* DSDT *always* updates status on resume */
7449 tp_features.fan_ctrl_status_undef = 0;
7450
7451 if (!fan_control_allowed ||
7452 !fan_control_resume_level ||
7453 (fan_get_status_safe(&current_level) < 0))
7454 return;
7455
7456 switch (fan_control_access_mode) {
7457 case TPACPI_FAN_WR_ACPI_SFAN:
7458 /* never decrease fan level */
7459 do_set = (fan_control_resume_level > current_level);
7460 break;
7461 case TPACPI_FAN_WR_ACPI_FANS:
7462 case TPACPI_FAN_WR_TPEC:
7463 /* never decrease fan level, scale is:
7464 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7465 *
7466 * We expect the firmware to set either 7 or AUTO, but we
7467 * handle FULLSPEED out of paranoia.
7468 *
7469 * So, we can safely only restore FULLSPEED or 7, anything
7470 * else could slow the fan. Restoring AUTO is useless, at
7471 * best that's exactly what the DSDT already set (it is the
7472 * slower it uses).
7473 *
7474 * Always keep in mind that the DSDT *will* have set the
7475 * fans to what the vendor supposes is the best level. We
7476 * muck with it only to speed the fan up.
7477 */
7478 if (fan_control_resume_level != 7 &&
7479 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7480 return;
7481 else
7482 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7483 (current_level != fan_control_resume_level);
7484 break;
7485 default:
7486 return;
7487 }
7488 if (do_set) {
7489 printk(TPACPI_NOTICE
7490 "restoring fan level to 0x%02x\n",
7491 fan_control_resume_level);
7492 rc = fan_set_level_safe(fan_control_resume_level);
7493 if (rc < 0)
7494 printk(TPACPI_NOTICE
7495 "failed to restore fan level: %d\n", rc);
7496 }
7497 }
7498
7499 static int fan_read(char *p)
7500 {
7501 int len = 0;
7502 int rc;
7503 u8 status;
7504 unsigned int speed = 0;
7505
7506 switch (fan_status_access_mode) {
7507 case TPACPI_FAN_RD_ACPI_GFAN:
7508 /* 570, 600e/x, 770e, 770x */
7509 rc = fan_get_status_safe(&status);
7510 if (rc < 0)
7511 return rc;
7512
7513 len += sprintf(p + len, "status:\t\t%s\n"
7514 "level:\t\t%d\n",
7515 (status != 0) ? "enabled" : "disabled", status);
7516 break;
7517
7518 case TPACPI_FAN_RD_TPEC:
7519 /* all except 570, 600e/x, 770e, 770x */
7520 rc = fan_get_status_safe(&status);
7521 if (rc < 0)
7522 return rc;
7523
7524 len += sprintf(p + len, "status:\t\t%s\n",
7525 (status != 0) ? "enabled" : "disabled");
7526
7527 rc = fan_get_speed(&speed);
7528 if (rc < 0)
7529 return rc;
7530
7531 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7532
7533 if (status & TP_EC_FAN_FULLSPEED)
7534 /* Disengaged mode takes precedence */
7535 len += sprintf(p + len, "level:\t\tdisengaged\n");
7536 else if (status & TP_EC_FAN_AUTO)
7537 len += sprintf(p + len, "level:\t\tauto\n");
7538 else
7539 len += sprintf(p + len, "level:\t\t%d\n", status);
7540 break;
7541
7542 case TPACPI_FAN_NONE:
7543 default:
7544 len += sprintf(p + len, "status:\t\tnot supported\n");
7545 }
7546
7547 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7548 len += sprintf(p + len, "commands:\tlevel <level>");
7549
7550 switch (fan_control_access_mode) {
7551 case TPACPI_FAN_WR_ACPI_SFAN:
7552 len += sprintf(p + len, " (<level> is 0-7)\n");
7553 break;
7554
7555 default:
7556 len += sprintf(p + len, " (<level> is 0-7, "
7557 "auto, disengaged, full-speed)\n");
7558 break;
7559 }
7560 }
7561
7562 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7563 len += sprintf(p + len, "commands:\tenable, disable\n"
7564 "commands:\twatchdog <timeout> (<timeout> "
7565 "is 0 (off), 1-120 (seconds))\n");
7566
7567 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7568 len += sprintf(p + len, "commands:\tspeed <speed>"
7569 " (<speed> is 0-65535)\n");
7570
7571 return len;
7572 }
7573
7574 static int fan_write_cmd_level(const char *cmd, int *rc)
7575 {
7576 int level;
7577
7578 if (strlencmp(cmd, "level auto") == 0)
7579 level = TP_EC_FAN_AUTO;
7580 else if ((strlencmp(cmd, "level disengaged") == 0) |
7581 (strlencmp(cmd, "level full-speed") == 0))
7582 level = TP_EC_FAN_FULLSPEED;
7583 else if (sscanf(cmd, "level %d", &level) != 1)
7584 return 0;
7585
7586 *rc = fan_set_level_safe(level);
7587 if (*rc == -ENXIO)
7588 printk(TPACPI_ERR "level command accepted for unsupported "
7589 "access mode %d", fan_control_access_mode);
7590 else if (!*rc)
7591 tpacpi_disclose_usertask("procfs fan",
7592 "set level to %d\n", level);
7593
7594 return 1;
7595 }
7596
7597 static int fan_write_cmd_enable(const char *cmd, int *rc)
7598 {
7599 if (strlencmp(cmd, "enable") != 0)
7600 return 0;
7601
7602 *rc = fan_set_enable();
7603 if (*rc == -ENXIO)
7604 printk(TPACPI_ERR "enable command accepted for unsupported "
7605 "access mode %d", fan_control_access_mode);
7606 else if (!*rc)
7607 tpacpi_disclose_usertask("procfs fan", "enable\n");
7608
7609 return 1;
7610 }
7611
7612 static int fan_write_cmd_disable(const char *cmd, int *rc)
7613 {
7614 if (strlencmp(cmd, "disable") != 0)
7615 return 0;
7616
7617 *rc = fan_set_disable();
7618 if (*rc == -ENXIO)
7619 printk(TPACPI_ERR "disable command accepted for unsupported "
7620 "access mode %d", fan_control_access_mode);
7621 else if (!*rc)
7622 tpacpi_disclose_usertask("procfs fan", "disable\n");
7623
7624 return 1;
7625 }
7626
7627 static int fan_write_cmd_speed(const char *cmd, int *rc)
7628 {
7629 int speed;
7630
7631 /* TODO:
7632 * Support speed <low> <medium> <high> ? */
7633
7634 if (sscanf(cmd, "speed %d", &speed) != 1)
7635 return 0;
7636
7637 *rc = fan_set_speed(speed);
7638 if (*rc == -ENXIO)
7639 printk(TPACPI_ERR "speed command accepted for unsupported "
7640 "access mode %d", fan_control_access_mode);
7641 else if (!*rc)
7642 tpacpi_disclose_usertask("procfs fan",
7643 "set speed to %d\n", speed);
7644
7645 return 1;
7646 }
7647
7648 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7649 {
7650 int interval;
7651
7652 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7653 return 0;
7654
7655 if (interval < 0 || interval > 120)
7656 *rc = -EINVAL;
7657 else {
7658 fan_watchdog_maxinterval = interval;
7659 tpacpi_disclose_usertask("procfs fan",
7660 "set watchdog timer to %d\n",
7661 interval);
7662 }
7663
7664 return 1;
7665 }
7666
7667 static int fan_write(char *buf)
7668 {
7669 char *cmd;
7670 int rc = 0;
7671
7672 while (!rc && (cmd = next_cmd(&buf))) {
7673 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7674 fan_write_cmd_level(cmd, &rc)) &&
7675 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7676 (fan_write_cmd_enable(cmd, &rc) ||
7677 fan_write_cmd_disable(cmd, &rc) ||
7678 fan_write_cmd_watchdog(cmd, &rc))) &&
7679 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7680 fan_write_cmd_speed(cmd, &rc))
7681 )
7682 rc = -EINVAL;
7683 else if (!rc)
7684 fan_watchdog_reset();
7685 }
7686
7687 return rc;
7688 }
7689
7690 static struct ibm_struct fan_driver_data = {
7691 .name = "fan",
7692 .read = fan_read,
7693 .write = fan_write,
7694 .exit = fan_exit,
7695 .suspend = fan_suspend,
7696 .resume = fan_resume,
7697 };
7698
7699 /****************************************************************************
7700 ****************************************************************************
7701 *
7702 * Infrastructure
7703 *
7704 ****************************************************************************
7705 ****************************************************************************/
7706
7707 /*
7708 * HKEY event callout for other subdrivers go here
7709 * (yes, it is ugly, but it is quick, safe, and gets the job done
7710 */
7711 static void tpacpi_driver_event(const unsigned int hkey_event)
7712 {
7713 }
7714
7715
7716
7717 static void hotkey_driver_event(const unsigned int scancode)
7718 {
7719 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
7720 }
7721
7722 /* sysfs name ---------------------------------------------------------- */
7723 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7724 struct device_attribute *attr,
7725 char *buf)
7726 {
7727 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7728 }
7729
7730 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7731 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7732
7733 /* --------------------------------------------------------------------- */
7734
7735 /* /proc support */
7736 static struct proc_dir_entry *proc_dir;
7737
7738 /*
7739 * Module and infrastructure proble, init and exit handling
7740 */
7741
7742 static int force_load;
7743
7744 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7745 static const char * __init str_supported(int is_supported)
7746 {
7747 static char text_unsupported[] __initdata = "not supported";
7748
7749 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7750 }
7751 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7752
7753 static void ibm_exit(struct ibm_struct *ibm)
7754 {
7755 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7756
7757 list_del_init(&ibm->all_drivers);
7758
7759 if (ibm->flags.acpi_notify_installed) {
7760 dbg_printk(TPACPI_DBG_EXIT,
7761 "%s: acpi_remove_notify_handler\n", ibm->name);
7762 BUG_ON(!ibm->acpi);
7763 acpi_remove_notify_handler(*ibm->acpi->handle,
7764 ibm->acpi->type,
7765 dispatch_acpi_notify);
7766 ibm->flags.acpi_notify_installed = 0;
7767 ibm->flags.acpi_notify_installed = 0;
7768 }
7769
7770 if (ibm->flags.proc_created) {
7771 dbg_printk(TPACPI_DBG_EXIT,
7772 "%s: remove_proc_entry\n", ibm->name);
7773 remove_proc_entry(ibm->name, proc_dir);
7774 ibm->flags.proc_created = 0;
7775 }
7776
7777 if (ibm->flags.acpi_driver_registered) {
7778 dbg_printk(TPACPI_DBG_EXIT,
7779 "%s: acpi_bus_unregister_driver\n", ibm->name);
7780 BUG_ON(!ibm->acpi);
7781 acpi_bus_unregister_driver(ibm->acpi->driver);
7782 kfree(ibm->acpi->driver);
7783 ibm->acpi->driver = NULL;
7784 ibm->flags.acpi_driver_registered = 0;
7785 }
7786
7787 if (ibm->flags.init_called && ibm->exit) {
7788 ibm->exit();
7789 ibm->flags.init_called = 0;
7790 }
7791
7792 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7793 }
7794
7795 static int __init ibm_init(struct ibm_init_struct *iibm)
7796 {
7797 int ret;
7798 struct ibm_struct *ibm = iibm->data;
7799 struct proc_dir_entry *entry;
7800
7801 BUG_ON(ibm == NULL);
7802
7803 INIT_LIST_HEAD(&ibm->all_drivers);
7804
7805 if (ibm->flags.experimental && !experimental)
7806 return 0;
7807
7808 dbg_printk(TPACPI_DBG_INIT,
7809 "probing for %s\n", ibm->name);
7810
7811 if (iibm->init) {
7812 ret = iibm->init(iibm);
7813 if (ret > 0)
7814 return 0; /* probe failed */
7815 if (ret)
7816 return ret;
7817
7818 ibm->flags.init_called = 1;
7819 }
7820
7821 if (ibm->acpi) {
7822 if (ibm->acpi->hid) {
7823 ret = register_tpacpi_subdriver(ibm);
7824 if (ret)
7825 goto err_out;
7826 }
7827
7828 if (ibm->acpi->notify) {
7829 ret = setup_acpi_notify(ibm);
7830 if (ret == -ENODEV) {
7831 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7832 ibm->name);
7833 ret = 0;
7834 goto err_out;
7835 }
7836 if (ret < 0)
7837 goto err_out;
7838 }
7839 }
7840
7841 dbg_printk(TPACPI_DBG_INIT,
7842 "%s installed\n", ibm->name);
7843
7844 if (ibm->read) {
7845 entry = create_proc_entry(ibm->name,
7846 S_IFREG | S_IRUGO | S_IWUSR,
7847 proc_dir);
7848 if (!entry) {
7849 printk(TPACPI_ERR "unable to create proc entry %s\n",
7850 ibm->name);
7851 ret = -ENODEV;
7852 goto err_out;
7853 }
7854 entry->data = ibm;
7855 entry->read_proc = &dispatch_procfs_read;
7856 if (ibm->write)
7857 entry->write_proc = &dispatch_procfs_write;
7858 ibm->flags.proc_created = 1;
7859 }
7860
7861 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7862
7863 return 0;
7864
7865 err_out:
7866 dbg_printk(TPACPI_DBG_INIT,
7867 "%s: at error exit path with result %d\n",
7868 ibm->name, ret);
7869
7870 ibm_exit(ibm);
7871 return (ret < 0)? ret : 0;
7872 }
7873
7874 /* Probing */
7875
7876 static bool __pure __init tpacpi_is_fw_digit(const char c)
7877 {
7878 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7879 }
7880
7881 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7882 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7883 const char t)
7884 {
7885 return s && strlen(s) >= 8 &&
7886 tpacpi_is_fw_digit(s[0]) &&
7887 tpacpi_is_fw_digit(s[1]) &&
7888 s[2] == t && s[3] == 'T' &&
7889 tpacpi_is_fw_digit(s[4]) &&
7890 tpacpi_is_fw_digit(s[5]) &&
7891 s[6] == 'W' && s[7] == 'W';
7892 }
7893
7894 /* returns 0 - probe ok, or < 0 - probe error.
7895 * Probe ok doesn't mean thinkpad found.
7896 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7897 static int __must_check __init get_thinkpad_model_data(
7898 struct thinkpad_id_data *tp)
7899 {
7900 const struct dmi_device *dev = NULL;
7901 char ec_fw_string[18];
7902 char const *s;
7903
7904 if (!tp)
7905 return -EINVAL;
7906
7907 memset(tp, 0, sizeof(*tp));
7908
7909 if (dmi_name_in_vendors("IBM"))
7910 tp->vendor = PCI_VENDOR_ID_IBM;
7911 else if (dmi_name_in_vendors("LENOVO"))
7912 tp->vendor = PCI_VENDOR_ID_LENOVO;
7913 else
7914 return 0;
7915
7916 s = dmi_get_system_info(DMI_BIOS_VERSION);
7917 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7918 if (s && !tp->bios_version_str)
7919 return -ENOMEM;
7920
7921 /* Really ancient ThinkPad 240X will fail this, which is fine */
7922 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7923 return 0;
7924
7925 tp->bios_model = tp->bios_version_str[0]
7926 | (tp->bios_version_str[1] << 8);
7927 tp->bios_release = (tp->bios_version_str[4] << 8)
7928 | tp->bios_version_str[5];
7929
7930 /*
7931 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7932 * X32 or newer, all Z series; Some models must have an
7933 * up-to-date BIOS or they will not be detected.
7934 *
7935 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7936 */
7937 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7938 if (sscanf(dev->name,
7939 "IBM ThinkPad Embedded Controller -[%17c",
7940 ec_fw_string) == 1) {
7941 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7942 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7943
7944 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7945 if (!tp->ec_version_str)
7946 return -ENOMEM;
7947
7948 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7949 tp->ec_model = ec_fw_string[0]
7950 | (ec_fw_string[1] << 8);
7951 tp->ec_release = (ec_fw_string[4] << 8)
7952 | ec_fw_string[5];
7953 } else {
7954 printk(TPACPI_NOTICE
7955 "ThinkPad firmware release %s "
7956 "doesn't match the known patterns\n",
7957 ec_fw_string);
7958 printk(TPACPI_NOTICE
7959 "please report this to %s\n",
7960 TPACPI_MAIL);
7961 }
7962 break;
7963 }
7964 }
7965
7966 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7967 if (s && !strnicmp(s, "ThinkPad", 8)) {
7968 tp->model_str = kstrdup(s, GFP_KERNEL);
7969 if (!tp->model_str)
7970 return -ENOMEM;
7971 }
7972
7973 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7974 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7975 if (s && !tp->nummodel_str)
7976 return -ENOMEM;
7977
7978 return 0;
7979 }
7980
7981 static int __init probe_for_thinkpad(void)
7982 {
7983 int is_thinkpad;
7984
7985 if (acpi_disabled)
7986 return -ENODEV;
7987
7988 /*
7989 * Non-ancient models have better DMI tagging, but very old models
7990 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
7991 */
7992 is_thinkpad = (thinkpad_id.model_str != NULL) ||
7993 (thinkpad_id.ec_model != 0) ||
7994 tpacpi_is_fw_known();
7995
7996 /* ec is required because many other handles are relative to it */
7997 TPACPI_ACPIHANDLE_INIT(ec);
7998 if (!ec_handle) {
7999 if (is_thinkpad)
8000 printk(TPACPI_ERR
8001 "Not yet supported ThinkPad detected!\n");
8002 return -ENODEV;
8003 }
8004
8005 if (!is_thinkpad && !force_load)
8006 return -ENODEV;
8007
8008 return 0;
8009 }
8010
8011
8012 /* Module init, exit, parameters */
8013
8014 static struct ibm_init_struct ibms_init[] __initdata = {
8015 {
8016 .init = thinkpad_acpi_driver_init,
8017 .data = &thinkpad_acpi_driver_data,
8018 },
8019 {
8020 .init = hotkey_init,
8021 .data = &hotkey_driver_data,
8022 },
8023 {
8024 .init = bluetooth_init,
8025 .data = &bluetooth_driver_data,
8026 },
8027 {
8028 .init = wan_init,
8029 .data = &wan_driver_data,
8030 },
8031 {
8032 .init = uwb_init,
8033 .data = &uwb_driver_data,
8034 },
8035 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8036 {
8037 .init = video_init,
8038 .data = &video_driver_data,
8039 },
8040 #endif
8041 {
8042 .init = light_init,
8043 .data = &light_driver_data,
8044 },
8045 {
8046 .init = cmos_init,
8047 .data = &cmos_driver_data,
8048 },
8049 {
8050 .init = led_init,
8051 .data = &led_driver_data,
8052 },
8053 {
8054 .init = beep_init,
8055 .data = &beep_driver_data,
8056 },
8057 {
8058 .init = thermal_init,
8059 .data = &thermal_driver_data,
8060 },
8061 {
8062 .data = &ecdump_driver_data,
8063 },
8064 {
8065 .init = brightness_init,
8066 .data = &brightness_driver_data,
8067 },
8068 {
8069 .data = &volume_driver_data,
8070 },
8071 {
8072 .init = fan_init,
8073 .data = &fan_driver_data,
8074 },
8075 };
8076
8077 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8078 {
8079 unsigned int i;
8080 struct ibm_struct *ibm;
8081
8082 if (!kp || !kp->name || !val)
8083 return -EINVAL;
8084
8085 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8086 ibm = ibms_init[i].data;
8087 WARN_ON(ibm == NULL);
8088
8089 if (!ibm || !ibm->name)
8090 continue;
8091
8092 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8093 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8094 return -ENOSPC;
8095 strcpy(ibms_init[i].param, val);
8096 strcat(ibms_init[i].param, ",");
8097 return 0;
8098 }
8099 }
8100
8101 return -EINVAL;
8102 }
8103
8104 module_param(experimental, int, 0);
8105 MODULE_PARM_DESC(experimental,
8106 "Enables experimental features when non-zero");
8107
8108 module_param_named(debug, dbg_level, uint, 0);
8109 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8110
8111 module_param(force_load, bool, 0);
8112 MODULE_PARM_DESC(force_load,
8113 "Attempts to load the driver even on a "
8114 "mis-identified ThinkPad when true");
8115
8116 module_param_named(fan_control, fan_control_allowed, bool, 0);
8117 MODULE_PARM_DESC(fan_control,
8118 "Enables setting fan parameters features when true");
8119
8120 module_param_named(brightness_mode, brightness_mode, uint, 0);
8121 MODULE_PARM_DESC(brightness_mode,
8122 "Selects brightness control strategy: "
8123 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8124
8125 module_param(brightness_enable, uint, 0);
8126 MODULE_PARM_DESC(brightness_enable,
8127 "Enables backlight control when 1, disables when 0");
8128
8129 module_param(hotkey_report_mode, uint, 0);
8130 MODULE_PARM_DESC(hotkey_report_mode,
8131 "used for backwards compatibility with userspace, "
8132 "see documentation");
8133
8134 #define TPACPI_PARAM(feature) \
8135 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8136 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8137 "at module load, see documentation")
8138
8139 TPACPI_PARAM(hotkey);
8140 TPACPI_PARAM(bluetooth);
8141 TPACPI_PARAM(video);
8142 TPACPI_PARAM(light);
8143 TPACPI_PARAM(cmos);
8144 TPACPI_PARAM(led);
8145 TPACPI_PARAM(beep);
8146 TPACPI_PARAM(ecdump);
8147 TPACPI_PARAM(brightness);
8148 TPACPI_PARAM(volume);
8149 TPACPI_PARAM(fan);
8150
8151 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8152 module_param(dbg_wlswemul, uint, 0);
8153 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8154 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8155 MODULE_PARM_DESC(wlsw_state,
8156 "Initial state of the emulated WLSW switch");
8157
8158 module_param(dbg_bluetoothemul, uint, 0);
8159 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8160 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8161 MODULE_PARM_DESC(bluetooth_state,
8162 "Initial state of the emulated bluetooth switch");
8163
8164 module_param(dbg_wwanemul, uint, 0);
8165 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8166 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8167 MODULE_PARM_DESC(wwan_state,
8168 "Initial state of the emulated WWAN switch");
8169
8170 module_param(dbg_uwbemul, uint, 0);
8171 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8172 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8173 MODULE_PARM_DESC(uwb_state,
8174 "Initial state of the emulated UWB switch");
8175 #endif
8176
8177 static void thinkpad_acpi_module_exit(void)
8178 {
8179 struct ibm_struct *ibm, *itmp;
8180
8181 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8182
8183 list_for_each_entry_safe_reverse(ibm, itmp,
8184 &tpacpi_all_drivers,
8185 all_drivers) {
8186 ibm_exit(ibm);
8187 }
8188
8189 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8190
8191 if (tpacpi_inputdev) {
8192 if (tp_features.input_device_registered)
8193 input_unregister_device(tpacpi_inputdev);
8194 else
8195 input_free_device(tpacpi_inputdev);
8196 }
8197
8198 if (tpacpi_hwmon)
8199 hwmon_device_unregister(tpacpi_hwmon);
8200
8201 if (tp_features.sensors_pdev_attrs_registered)
8202 device_remove_file(&tpacpi_sensors_pdev->dev,
8203 &dev_attr_thinkpad_acpi_pdev_name);
8204 if (tpacpi_sensors_pdev)
8205 platform_device_unregister(tpacpi_sensors_pdev);
8206 if (tpacpi_pdev)
8207 platform_device_unregister(tpacpi_pdev);
8208
8209 if (tp_features.sensors_pdrv_attrs_registered)
8210 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8211 if (tp_features.platform_drv_attrs_registered)
8212 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8213
8214 if (tp_features.sensors_pdrv_registered)
8215 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8216
8217 if (tp_features.platform_drv_registered)
8218 platform_driver_unregister(&tpacpi_pdriver);
8219
8220 if (proc_dir)
8221 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8222
8223 if (tpacpi_wq)
8224 destroy_workqueue(tpacpi_wq);
8225
8226 kfree(thinkpad_id.bios_version_str);
8227 kfree(thinkpad_id.ec_version_str);
8228 kfree(thinkpad_id.model_str);
8229 }
8230
8231
8232 static int __init thinkpad_acpi_module_init(void)
8233 {
8234 int ret, i;
8235
8236 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8237
8238 /* Parameter checking */
8239 if (hotkey_report_mode > 2)
8240 return -EINVAL;
8241
8242 /* Driver-level probe */
8243
8244 ret = get_thinkpad_model_data(&thinkpad_id);
8245 if (ret) {
8246 printk(TPACPI_ERR
8247 "unable to get DMI data: %d\n", ret);
8248 thinkpad_acpi_module_exit();
8249 return ret;
8250 }
8251 ret = probe_for_thinkpad();
8252 if (ret) {
8253 thinkpad_acpi_module_exit();
8254 return ret;
8255 }
8256
8257 /* Driver initialization */
8258
8259 TPACPI_ACPIHANDLE_INIT(ecrd);
8260 TPACPI_ACPIHANDLE_INIT(ecwr);
8261
8262 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8263 if (!tpacpi_wq) {
8264 thinkpad_acpi_module_exit();
8265 return -ENOMEM;
8266 }
8267
8268 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8269 if (!proc_dir) {
8270 printk(TPACPI_ERR
8271 "unable to create proc dir " TPACPI_PROC_DIR);
8272 thinkpad_acpi_module_exit();
8273 return -ENODEV;
8274 }
8275
8276 ret = platform_driver_register(&tpacpi_pdriver);
8277 if (ret) {
8278 printk(TPACPI_ERR
8279 "unable to register main platform driver\n");
8280 thinkpad_acpi_module_exit();
8281 return ret;
8282 }
8283 tp_features.platform_drv_registered = 1;
8284
8285 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8286 if (ret) {
8287 printk(TPACPI_ERR
8288 "unable to register hwmon platform driver\n");
8289 thinkpad_acpi_module_exit();
8290 return ret;
8291 }
8292 tp_features.sensors_pdrv_registered = 1;
8293
8294 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8295 if (!ret) {
8296 tp_features.platform_drv_attrs_registered = 1;
8297 ret = tpacpi_create_driver_attributes(
8298 &tpacpi_hwmon_pdriver.driver);
8299 }
8300 if (ret) {
8301 printk(TPACPI_ERR
8302 "unable to create sysfs driver attributes\n");
8303 thinkpad_acpi_module_exit();
8304 return ret;
8305 }
8306 tp_features.sensors_pdrv_attrs_registered = 1;
8307
8308
8309 /* Device initialization */
8310 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8311 NULL, 0);
8312 if (IS_ERR(tpacpi_pdev)) {
8313 ret = PTR_ERR(tpacpi_pdev);
8314 tpacpi_pdev = NULL;
8315 printk(TPACPI_ERR "unable to register platform device\n");
8316 thinkpad_acpi_module_exit();
8317 return ret;
8318 }
8319 tpacpi_sensors_pdev = platform_device_register_simple(
8320 TPACPI_HWMON_DRVR_NAME,
8321 -1, NULL, 0);
8322 if (IS_ERR(tpacpi_sensors_pdev)) {
8323 ret = PTR_ERR(tpacpi_sensors_pdev);
8324 tpacpi_sensors_pdev = NULL;
8325 printk(TPACPI_ERR
8326 "unable to register hwmon platform device\n");
8327 thinkpad_acpi_module_exit();
8328 return ret;
8329 }
8330 ret = device_create_file(&tpacpi_sensors_pdev->dev,
8331 &dev_attr_thinkpad_acpi_pdev_name);
8332 if (ret) {
8333 printk(TPACPI_ERR
8334 "unable to create sysfs hwmon device attributes\n");
8335 thinkpad_acpi_module_exit();
8336 return ret;
8337 }
8338 tp_features.sensors_pdev_attrs_registered = 1;
8339 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8340 if (IS_ERR(tpacpi_hwmon)) {
8341 ret = PTR_ERR(tpacpi_hwmon);
8342 tpacpi_hwmon = NULL;
8343 printk(TPACPI_ERR "unable to register hwmon device\n");
8344 thinkpad_acpi_module_exit();
8345 return ret;
8346 }
8347 mutex_init(&tpacpi_inputdev_send_mutex);
8348 tpacpi_inputdev = input_allocate_device();
8349 if (!tpacpi_inputdev) {
8350 printk(TPACPI_ERR "unable to allocate input device\n");
8351 thinkpad_acpi_module_exit();
8352 return -ENOMEM;
8353 } else {
8354 /* Prepare input device, but don't register */
8355 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8356 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8357 tpacpi_inputdev->id.bustype = BUS_HOST;
8358 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8359 thinkpad_id.vendor :
8360 PCI_VENDOR_ID_IBM;
8361 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8362 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8363 }
8364 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8365 ret = ibm_init(&ibms_init[i]);
8366 if (ret >= 0 && *ibms_init[i].param)
8367 ret = ibms_init[i].data->write(ibms_init[i].param);
8368 if (ret < 0) {
8369 thinkpad_acpi_module_exit();
8370 return ret;
8371 }
8372 }
8373 ret = input_register_device(tpacpi_inputdev);
8374 if (ret < 0) {
8375 printk(TPACPI_ERR "unable to register input device\n");
8376 thinkpad_acpi_module_exit();
8377 return ret;
8378 } else {
8379 tp_features.input_device_registered = 1;
8380 }
8381
8382 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8383 return 0;
8384 }
8385
8386 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8387
8388 /*
8389 * This will autoload the driver in almost every ThinkPad
8390 * in widespread use.
8391 *
8392 * Only _VERY_ old models, like the 240, 240x and 570 lack
8393 * the HKEY event interface.
8394 */
8395 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8396
8397 /*
8398 * DMI matching for module autoloading
8399 *
8400 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8401 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8402 *
8403 * Only models listed in thinkwiki will be supported, so add yours
8404 * if it is not there yet.
8405 */
8406 #define IBM_BIOS_MODULE_ALIAS(__type) \
8407 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8408
8409 /* Ancient thinkpad BIOSes have to be identified by
8410 * BIOS type or model number, and there are far less
8411 * BIOS types than model numbers... */
8412 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
8413
8414 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8415 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8416 MODULE_DESCRIPTION(TPACPI_DESC);
8417 MODULE_VERSION(TPACPI_VERSION);
8418 MODULE_LICENSE("GPL");
8419
8420 module_init(thinkpad_acpi_module_init);
8421 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree