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thinkpad-acpi: report brightness events when required
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blob955adf67e8f0138f711e3dba80e3c250cd178997
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 0x020400
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 /****************************************************************************
149 * Main driver
150 */
151
152 #define TPACPI_NAME "thinkpad"
153 #define TPACPI_DESC "ThinkPad ACPI Extras"
154 #define TPACPI_FILE TPACPI_NAME "_acpi"
155 #define TPACPI_URL "http://ibm-acpi.sf.net/"
156 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
157
158 #define TPACPI_PROC_DIR "ibm"
159 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
160 #define TPACPI_DRVR_NAME TPACPI_FILE
161 #define TPACPI_DRVR_SHORTNAME "tpacpi"
162 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
163
164 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
165 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
166
167 #define TPACPI_MAX_ACPI_ARGS 3
168
169 /* printk headers */
170 #define TPACPI_LOG TPACPI_FILE ": "
171 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
172 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
173 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
174 #define TPACPI_ERR KERN_ERR TPACPI_LOG
175 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
176 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
177 #define TPACPI_INFO KERN_INFO TPACPI_LOG
178 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
179
180 /* Debugging printk groups */
181 #define TPACPI_DBG_ALL 0xffff
182 #define TPACPI_DBG_DISCLOSETASK 0x8000
183 #define TPACPI_DBG_INIT 0x0001
184 #define TPACPI_DBG_EXIT 0x0002
185 #define TPACPI_DBG_RFKILL 0x0004
186 #define TPACPI_DBG_HKEY 0x0008
187 #define TPACPI_DBG_FAN 0x0010
188 #define TPACPI_DBG_BRGHT 0x0020
189
190 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
191 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
192 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
193
194
195 /****************************************************************************
196 * Driver-wide structs and misc. variables
197 */
198
199 struct ibm_struct;
200
201 struct tp_acpi_drv_struct {
202 const struct acpi_device_id *hid;
203 struct acpi_driver *driver;
204
205 void (*notify) (struct ibm_struct *, u32);
206 acpi_handle *handle;
207 u32 type;
208 struct acpi_device *device;
209 };
210
211 struct ibm_struct {
212 char *name;
213
214 int (*read) (char *);
215 int (*write) (char *);
216 void (*exit) (void);
217 void (*resume) (void);
218 void (*suspend) (pm_message_t state);
219 void (*shutdown) (void);
220
221 struct list_head all_drivers;
222
223 struct tp_acpi_drv_struct *acpi;
224
225 struct {
226 u8 acpi_driver_registered:1;
227 u8 acpi_notify_installed:1;
228 u8 proc_created:1;
229 u8 init_called:1;
230 u8 experimental:1;
231 } flags;
232 };
233
234 struct ibm_init_struct {
235 char param[32];
236
237 int (*init) (struct ibm_init_struct *);
238 struct ibm_struct *data;
239 };
240
241 static struct {
242 u32 bluetooth:1;
243 u32 hotkey:1;
244 u32 hotkey_mask:1;
245 u32 hotkey_wlsw:1;
246 u32 hotkey_tablet:1;
247 u32 light:1;
248 u32 light_status:1;
249 u32 bright_16levels:1;
250 u32 bright_acpimode:1;
251 u32 wan:1;
252 u32 uwb:1;
253 u32 fan_ctrl_status_undef:1;
254 u32 second_fan:1;
255 u32 beep_needs_two_args:1;
256 u32 input_device_registered:1;
257 u32 platform_drv_registered:1;
258 u32 platform_drv_attrs_registered:1;
259 u32 sensors_pdrv_registered:1;
260 u32 sensors_pdrv_attrs_registered:1;
261 u32 sensors_pdev_attrs_registered:1;
262 u32 hotkey_poll_active:1;
263 } tp_features;
264
265 static struct {
266 u16 hotkey_mask_ff:1;
267 } tp_warned;
268
269 struct thinkpad_id_data {
270 unsigned int vendor; /* ThinkPad vendor:
271 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
272
273 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
274 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
275
276 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
277 u16 ec_model;
278 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
279 u16 ec_release;
280
281 char *model_str; /* ThinkPad T43 */
282 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
283 };
284 static struct thinkpad_id_data thinkpad_id;
285
286 static enum {
287 TPACPI_LIFE_INIT = 0,
288 TPACPI_LIFE_RUNNING,
289 TPACPI_LIFE_EXITING,
290 } tpacpi_lifecycle;
291
292 static int experimental;
293 static u32 dbg_level;
294
295 static struct workqueue_struct *tpacpi_wq;
296
297 enum led_status_t {
298 TPACPI_LED_OFF = 0,
299 TPACPI_LED_ON,
300 TPACPI_LED_BLINK,
301 };
302
303 /* Special LED class that can defer work */
304 struct tpacpi_led_classdev {
305 struct led_classdev led_classdev;
306 struct work_struct work;
307 enum led_status_t new_state;
308 unsigned int led;
309 };
310
311 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
312 static int dbg_wlswemul;
313 static int tpacpi_wlsw_emulstate;
314 static int dbg_bluetoothemul;
315 static int tpacpi_bluetooth_emulstate;
316 static int dbg_wwanemul;
317 static int tpacpi_wwan_emulstate;
318 static int dbg_uwbemul;
319 static int tpacpi_uwb_emulstate;
320 #endif
321
322
323 /*************************************************************************
324 * Debugging helpers
325 */
326
327 #define dbg_printk(a_dbg_level, format, arg...) \
328 do { if (dbg_level & (a_dbg_level)) \
329 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
330 } while (0)
331
332 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
333 #define vdbg_printk dbg_printk
334 static const char *str_supported(int is_supported);
335 #else
336 #define vdbg_printk(a_dbg_level, format, arg...) \
337 do { } while (0)
338 #endif
339
340 static void tpacpi_log_usertask(const char * const what)
341 {
342 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
343 what, task_tgid_vnr(current));
344 }
345
346 #define tpacpi_disclose_usertask(what, format, arg...) \
347 do { \
348 if (unlikely( \
349 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
350 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
351 printk(TPACPI_DEBUG "%s: PID %d: " format, \
352 what, task_tgid_vnr(current), ## arg); \
353 } \
354 } while (0)
355
356 /*
357 * Quirk handling helpers
358 *
359 * ThinkPad IDs and versions seen in the field so far
360 * are two-characters from the set [0-9A-Z], i.e. base 36.
361 *
362 * We use values well outside that range as specials.
363 */
364
365 #define TPACPI_MATCH_ANY 0xffffU
366 #define TPACPI_MATCH_UNKNOWN 0U
367
368 /* TPID('1', 'Y') == 0x5931 */
369 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
370
371 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
372 { .vendor = PCI_VENDOR_ID_IBM, \
373 .bios = TPID(__id1, __id2), \
374 .ec = TPACPI_MATCH_ANY, \
375 .quirks = (__quirk) }
376
377 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
378 { .vendor = PCI_VENDOR_ID_LENOVO, \
379 .bios = TPID(__id1, __id2), \
380 .ec = TPACPI_MATCH_ANY, \
381 .quirks = (__quirk) }
382
383 struct tpacpi_quirk {
384 unsigned int vendor;
385 u16 bios;
386 u16 ec;
387 unsigned long quirks;
388 };
389
390 /**
391 * tpacpi_check_quirks() - search BIOS/EC version on a list
392 * @qlist: array of &struct tpacpi_quirk
393 * @qlist_size: number of elements in @qlist
394 *
395 * Iterates over a quirks list until one is found that matches the
396 * ThinkPad's vendor, BIOS and EC model.
397 *
398 * Returns 0 if nothing matches, otherwise returns the quirks field of
399 * the matching &struct tpacpi_quirk entry.
400 *
401 * The match criteria is: vendor, ec and bios much match.
402 */
403 static unsigned long __init tpacpi_check_quirks(
404 const struct tpacpi_quirk *qlist,
405 unsigned int qlist_size)
406 {
407 while (qlist_size) {
408 if ((qlist->vendor == thinkpad_id.vendor ||
409 qlist->vendor == TPACPI_MATCH_ANY) &&
410 (qlist->bios == thinkpad_id.bios_model ||
411 qlist->bios == TPACPI_MATCH_ANY) &&
412 (qlist->ec == thinkpad_id.ec_model ||
413 qlist->ec == TPACPI_MATCH_ANY))
414 return qlist->quirks;
415
416 qlist_size--;
417 qlist++;
418 }
419 return 0;
420 }
421
422
423 /****************************************************************************
424 ****************************************************************************
425 *
426 * ACPI Helpers and device model
427 *
428 ****************************************************************************
429 ****************************************************************************/
430
431 /*************************************************************************
432 * ACPI basic handles
433 */
434
435 static acpi_handle root_handle;
436
437 #define TPACPI_HANDLE(object, parent, paths...) \
438 static acpi_handle object##_handle; \
439 static acpi_handle *object##_parent = &parent##_handle; \
440 static char *object##_path; \
441 static char *object##_paths[] = { paths }
442
443 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
444 "\\_SB.PCI.ISA.EC", /* 570 */
445 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
446 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
447 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
448 "\\_SB.PCI0.ICH3.EC0", /* R31 */
449 "\\_SB.PCI0.LPC.EC", /* all others */
450 );
451
452 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
453 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
454
455 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
456 /* T4x, X31, X40 */
457 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
458 "\\CMS", /* R40, R40e */
459 ); /* all others */
460
461 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
462 "^HKEY", /* R30, R31 */
463 "HKEY", /* all others */
464 ); /* 570 */
465
466 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
467 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
468 "\\_SB.PCI0.VID0", /* 770e */
469 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
470 "\\_SB.PCI0.AGP.VID", /* all others */
471 ); /* R30, R31 */
472
473
474 /*************************************************************************
475 * ACPI helpers
476 */
477
478 static int acpi_evalf(acpi_handle handle,
479 void *res, char *method, char *fmt, ...)
480 {
481 char *fmt0 = fmt;
482 struct acpi_object_list params;
483 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
484 struct acpi_buffer result, *resultp;
485 union acpi_object out_obj;
486 acpi_status status;
487 va_list ap;
488 char res_type;
489 int success;
490 int quiet;
491
492 if (!*fmt) {
493 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
494 return 0;
495 }
496
497 if (*fmt == 'q') {
498 quiet = 1;
499 fmt++;
500 } else
501 quiet = 0;
502
503 res_type = *(fmt++);
504
505 params.count = 0;
506 params.pointer = &in_objs[0];
507
508 va_start(ap, fmt);
509 while (*fmt) {
510 char c = *(fmt++);
511 switch (c) {
512 case 'd': /* int */
513 in_objs[params.count].integer.value = va_arg(ap, int);
514 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
515 break;
516 /* add more types as needed */
517 default:
518 printk(TPACPI_ERR "acpi_evalf() called "
519 "with invalid format character '%c'\n", c);
520 return 0;
521 }
522 }
523 va_end(ap);
524
525 if (res_type != 'v') {
526 result.length = sizeof(out_obj);
527 result.pointer = &out_obj;
528 resultp = &result;
529 } else
530 resultp = NULL;
531
532 status = acpi_evaluate_object(handle, method, &params, resultp);
533
534 switch (res_type) {
535 case 'd': /* int */
536 if (res)
537 *(int *)res = out_obj.integer.value;
538 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
539 break;
540 case 'v': /* void */
541 success = status == AE_OK;
542 break;
543 /* add more types as needed */
544 default:
545 printk(TPACPI_ERR "acpi_evalf() called "
546 "with invalid format character '%c'\n", res_type);
547 return 0;
548 }
549
550 if (!success && !quiet)
551 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
552 method, fmt0, status);
553
554 return success;
555 }
556
557 static int acpi_ec_read(int i, u8 *p)
558 {
559 int v;
560
561 if (ecrd_handle) {
562 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
563 return 0;
564 *p = v;
565 } else {
566 if (ec_read(i, p) < 0)
567 return 0;
568 }
569
570 return 1;
571 }
572
573 static int acpi_ec_write(int i, u8 v)
574 {
575 if (ecwr_handle) {
576 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
577 return 0;
578 } else {
579 if (ec_write(i, v) < 0)
580 return 0;
581 }
582
583 return 1;
584 }
585
586 static int issue_thinkpad_cmos_command(int cmos_cmd)
587 {
588 if (!cmos_handle)
589 return -ENXIO;
590
591 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
592 return -EIO;
593
594 return 0;
595 }
596
597 /*************************************************************************
598 * ACPI device model
599 */
600
601 #define TPACPI_ACPIHANDLE_INIT(object) \
602 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
603 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
604
605 static void drv_acpi_handle_init(char *name,
606 acpi_handle *handle, acpi_handle parent,
607 char **paths, int num_paths, char **path)
608 {
609 int i;
610 acpi_status status;
611
612 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
613 name);
614
615 for (i = 0; i < num_paths; i++) {
616 status = acpi_get_handle(parent, paths[i], handle);
617 if (ACPI_SUCCESS(status)) {
618 *path = paths[i];
619 dbg_printk(TPACPI_DBG_INIT,
620 "Found ACPI handle %s for %s\n",
621 *path, name);
622 return;
623 }
624 }
625
626 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
627 name);
628 *handle = NULL;
629 }
630
631 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
632 {
633 struct ibm_struct *ibm = data;
634
635 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
636 return;
637
638 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
639 return;
640
641 ibm->acpi->notify(ibm, event);
642 }
643
644 static int __init setup_acpi_notify(struct ibm_struct *ibm)
645 {
646 acpi_status status;
647 int rc;
648
649 BUG_ON(!ibm->acpi);
650
651 if (!*ibm->acpi->handle)
652 return 0;
653
654 vdbg_printk(TPACPI_DBG_INIT,
655 "setting up ACPI notify for %s\n", ibm->name);
656
657 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
658 if (rc < 0) {
659 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
660 ibm->name, rc);
661 return -ENODEV;
662 }
663
664 ibm->acpi->device->driver_data = ibm;
665 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
666 TPACPI_ACPI_EVENT_PREFIX,
667 ibm->name);
668
669 status = acpi_install_notify_handler(*ibm->acpi->handle,
670 ibm->acpi->type, dispatch_acpi_notify, ibm);
671 if (ACPI_FAILURE(status)) {
672 if (status == AE_ALREADY_EXISTS) {
673 printk(TPACPI_NOTICE
674 "another device driver is already "
675 "handling %s events\n", ibm->name);
676 } else {
677 printk(TPACPI_ERR
678 "acpi_install_notify_handler(%s) failed: %d\n",
679 ibm->name, status);
680 }
681 return -ENODEV;
682 }
683 ibm->flags.acpi_notify_installed = 1;
684 return 0;
685 }
686
687 static int __init tpacpi_device_add(struct acpi_device *device)
688 {
689 return 0;
690 }
691
692 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
693 {
694 int rc;
695
696 dbg_printk(TPACPI_DBG_INIT,
697 "registering %s as an ACPI driver\n", ibm->name);
698
699 BUG_ON(!ibm->acpi);
700
701 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
702 if (!ibm->acpi->driver) {
703 printk(TPACPI_ERR
704 "failed to allocate memory for ibm->acpi->driver\n");
705 return -ENOMEM;
706 }
707
708 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
709 ibm->acpi->driver->ids = ibm->acpi->hid;
710
711 ibm->acpi->driver->ops.add = &tpacpi_device_add;
712
713 rc = acpi_bus_register_driver(ibm->acpi->driver);
714 if (rc < 0) {
715 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
716 ibm->name, rc);
717 kfree(ibm->acpi->driver);
718 ibm->acpi->driver = NULL;
719 } else if (!rc)
720 ibm->flags.acpi_driver_registered = 1;
721
722 return rc;
723 }
724
725
726 /****************************************************************************
727 ****************************************************************************
728 *
729 * Procfs Helpers
730 *
731 ****************************************************************************
732 ****************************************************************************/
733
734 static int dispatch_procfs_read(char *page, char **start, off_t off,
735 int count, int *eof, void *data)
736 {
737 struct ibm_struct *ibm = data;
738 int len;
739
740 if (!ibm || !ibm->read)
741 return -EINVAL;
742
743 len = ibm->read(page);
744 if (len < 0)
745 return len;
746
747 if (len <= off + count)
748 *eof = 1;
749 *start = page + off;
750 len -= off;
751 if (len > count)
752 len = count;
753 if (len < 0)
754 len = 0;
755
756 return len;
757 }
758
759 static int dispatch_procfs_write(struct file *file,
760 const char __user *userbuf,
761 unsigned long count, void *data)
762 {
763 struct ibm_struct *ibm = data;
764 char *kernbuf;
765 int ret;
766
767 if (!ibm || !ibm->write)
768 return -EINVAL;
769 if (count > PAGE_SIZE - 2)
770 return -EINVAL;
771
772 kernbuf = kmalloc(count + 2, GFP_KERNEL);
773 if (!kernbuf)
774 return -ENOMEM;
775
776 if (copy_from_user(kernbuf, userbuf, count)) {
777 kfree(kernbuf);
778 return -EFAULT;
779 }
780
781 kernbuf[count] = 0;
782 strcat(kernbuf, ",");
783 ret = ibm->write(kernbuf);
784 if (ret == 0)
785 ret = count;
786
787 kfree(kernbuf);
788
789 return ret;
790 }
791
792 static char *next_cmd(char **cmds)
793 {
794 char *start = *cmds;
795 char *end;
796
797 while ((end = strchr(start, ',')) && end == start)
798 start = end + 1;
799
800 if (!end)
801 return NULL;
802
803 *end = 0;
804 *cmds = end + 1;
805 return start;
806 }
807
808
809 /****************************************************************************
810 ****************************************************************************
811 *
812 * Device model: input, hwmon and platform
813 *
814 ****************************************************************************
815 ****************************************************************************/
816
817 static struct platform_device *tpacpi_pdev;
818 static struct platform_device *tpacpi_sensors_pdev;
819 static struct device *tpacpi_hwmon;
820 static struct input_dev *tpacpi_inputdev;
821 static struct mutex tpacpi_inputdev_send_mutex;
822 static LIST_HEAD(tpacpi_all_drivers);
823
824 static int tpacpi_suspend_handler(struct platform_device *pdev,
825 pm_message_t state)
826 {
827 struct ibm_struct *ibm, *itmp;
828
829 list_for_each_entry_safe(ibm, itmp,
830 &tpacpi_all_drivers,
831 all_drivers) {
832 if (ibm->suspend)
833 (ibm->suspend)(state);
834 }
835
836 return 0;
837 }
838
839 static int tpacpi_resume_handler(struct platform_device *pdev)
840 {
841 struct ibm_struct *ibm, *itmp;
842
843 list_for_each_entry_safe(ibm, itmp,
844 &tpacpi_all_drivers,
845 all_drivers) {
846 if (ibm->resume)
847 (ibm->resume)();
848 }
849
850 return 0;
851 }
852
853 static void tpacpi_shutdown_handler(struct platform_device *pdev)
854 {
855 struct ibm_struct *ibm, *itmp;
856
857 list_for_each_entry_safe(ibm, itmp,
858 &tpacpi_all_drivers,
859 all_drivers) {
860 if (ibm->shutdown)
861 (ibm->shutdown)();
862 }
863 }
864
865 static struct platform_driver tpacpi_pdriver = {
866 .driver = {
867 .name = TPACPI_DRVR_NAME,
868 .owner = THIS_MODULE,
869 },
870 .suspend = tpacpi_suspend_handler,
871 .resume = tpacpi_resume_handler,
872 .shutdown = tpacpi_shutdown_handler,
873 };
874
875 static struct platform_driver tpacpi_hwmon_pdriver = {
876 .driver = {
877 .name = TPACPI_HWMON_DRVR_NAME,
878 .owner = THIS_MODULE,
879 },
880 };
881
882 /*************************************************************************
883 * sysfs support helpers
884 */
885
886 struct attribute_set {
887 unsigned int members, max_members;
888 struct attribute_group group;
889 };
890
891 struct attribute_set_obj {
892 struct attribute_set s;
893 struct attribute *a;
894 } __attribute__((packed));
895
896 static struct attribute_set *create_attr_set(unsigned int max_members,
897 const char *name)
898 {
899 struct attribute_set_obj *sobj;
900
901 if (max_members == 0)
902 return NULL;
903
904 /* Allocates space for implicit NULL at the end too */
905 sobj = kzalloc(sizeof(struct attribute_set_obj) +
906 max_members * sizeof(struct attribute *),
907 GFP_KERNEL);
908 if (!sobj)
909 return NULL;
910 sobj->s.max_members = max_members;
911 sobj->s.group.attrs = &sobj->a;
912 sobj->s.group.name = name;
913
914 return &sobj->s;
915 }
916
917 #define destroy_attr_set(_set) \
918 kfree(_set);
919
920 /* not multi-threaded safe, use it in a single thread per set */
921 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
922 {
923 if (!s || !attr)
924 return -EINVAL;
925
926 if (s->members >= s->max_members)
927 return -ENOMEM;
928
929 s->group.attrs[s->members] = attr;
930 s->members++;
931
932 return 0;
933 }
934
935 static int add_many_to_attr_set(struct attribute_set *s,
936 struct attribute **attr,
937 unsigned int count)
938 {
939 int i, res;
940
941 for (i = 0; i < count; i++) {
942 res = add_to_attr_set(s, attr[i]);
943 if (res)
944 return res;
945 }
946
947 return 0;
948 }
949
950 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
951 {
952 sysfs_remove_group(kobj, &s->group);
953 destroy_attr_set(s);
954 }
955
956 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
957 sysfs_create_group(_kobj, &_attr_set->group)
958
959 static int parse_strtoul(const char *buf,
960 unsigned long max, unsigned long *value)
961 {
962 char *endp;
963
964 while (*buf && isspace(*buf))
965 buf++;
966 *value = simple_strtoul(buf, &endp, 0);
967 while (*endp && isspace(*endp))
968 endp++;
969 if (*endp || *value > max)
970 return -EINVAL;
971
972 return 0;
973 }
974
975 static void tpacpi_disable_brightness_delay(void)
976 {
977 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
978 printk(TPACPI_NOTICE
979 "ACPI backlight control delay disabled\n");
980 }
981
982 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
983 {
984 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
985 union acpi_object *obj;
986 int rc;
987
988 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
989 obj = (union acpi_object *)buffer.pointer;
990 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
991 printk(TPACPI_ERR "Unknown _BCL data, "
992 "please report this to %s\n", TPACPI_MAIL);
993 rc = 0;
994 } else {
995 rc = obj->package.count;
996 }
997 } else {
998 return 0;
999 }
1000
1001 kfree(buffer.pointer);
1002 return rc;
1003 }
1004
1005 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1006 u32 lvl, void *context, void **rv)
1007 {
1008 char name[ACPI_PATH_SEGMENT_LENGTH];
1009 struct acpi_buffer buffer = { sizeof(name), &name };
1010
1011 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1012 !strncmp("_BCL", name, sizeof(name) - 1)) {
1013 BUG_ON(!rv || !*rv);
1014 **(int **)rv = tpacpi_query_bcl_levels(handle);
1015 return AE_CTRL_TERMINATE;
1016 } else {
1017 return AE_OK;
1018 }
1019 }
1020
1021 /*
1022 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1023 */
1024 static int __init tpacpi_check_std_acpi_brightness_support(void)
1025 {
1026 int status;
1027 int bcl_levels = 0;
1028 void *bcl_ptr = &bcl_levels;
1029
1030 if (!vid_handle) {
1031 TPACPI_ACPIHANDLE_INIT(vid);
1032 }
1033 if (!vid_handle)
1034 return 0;
1035
1036 /*
1037 * Search for a _BCL method, and execute it. This is safe on all
1038 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1039 * BIOS in ACPI backlight control mode. We do NOT have to care
1040 * about calling the _BCL method in an enabled video device, any
1041 * will do for our purposes.
1042 */
1043
1044 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1045 tpacpi_acpi_walk_find_bcl, NULL,
1046 &bcl_ptr);
1047
1048 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1049 tp_features.bright_acpimode = 1;
1050 return (bcl_levels - 2);
1051 }
1052
1053 return 0;
1054 }
1055
1056 static void printk_deprecated_attribute(const char * const what,
1057 const char * const details)
1058 {
1059 tpacpi_log_usertask("deprecated sysfs attribute");
1060 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1061 "will be removed. %s\n",
1062 what, details);
1063 }
1064
1065 /*************************************************************************
1066 * rfkill and radio control support helpers
1067 */
1068
1069 /*
1070 * ThinkPad-ACPI firmware handling model:
1071 *
1072 * WLSW (master wireless switch) is event-driven, and is common to all
1073 * firmware-controlled radios. It cannot be controlled, just monitored,
1074 * as expected. It overrides all radio state in firmware
1075 *
1076 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1077 * (TODO: verify how WLSW interacts with the returned radio state).
1078 *
1079 * The only time there are shadow radio state changes, is when
1080 * masked-off hotkeys are used.
1081 */
1082
1083 /*
1084 * Internal driver API for radio state:
1085 *
1086 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1087 * bool: true means radio blocked (off)
1088 */
1089 enum tpacpi_rfkill_state {
1090 TPACPI_RFK_RADIO_OFF = 0,
1091 TPACPI_RFK_RADIO_ON
1092 };
1093
1094 /* rfkill switches */
1095 enum tpacpi_rfk_id {
1096 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1097 TPACPI_RFK_WWAN_SW_ID,
1098 TPACPI_RFK_UWB_SW_ID,
1099 TPACPI_RFK_SW_MAX
1100 };
1101
1102 static const char *tpacpi_rfkill_names[] = {
1103 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1104 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1105 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1106 [TPACPI_RFK_SW_MAX] = NULL
1107 };
1108
1109 /* ThinkPad-ACPI rfkill subdriver */
1110 struct tpacpi_rfk {
1111 struct rfkill *rfkill;
1112 enum tpacpi_rfk_id id;
1113 const struct tpacpi_rfk_ops *ops;
1114 };
1115
1116 struct tpacpi_rfk_ops {
1117 /* firmware interface */
1118 int (*get_status)(void);
1119 int (*set_status)(const enum tpacpi_rfkill_state);
1120 };
1121
1122 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1123
1124 /* Query FW and update rfkill sw state for a given rfkill switch */
1125 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1126 {
1127 int status;
1128
1129 if (!tp_rfk)
1130 return -ENODEV;
1131
1132 status = (tp_rfk->ops->get_status)();
1133 if (status < 0)
1134 return status;
1135
1136 rfkill_set_sw_state(tp_rfk->rfkill,
1137 (status == TPACPI_RFK_RADIO_OFF));
1138
1139 return status;
1140 }
1141
1142 /* Query FW and update rfkill sw state for all rfkill switches */
1143 static void tpacpi_rfk_update_swstate_all(void)
1144 {
1145 unsigned int i;
1146
1147 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1148 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1149 }
1150
1151 /*
1152 * Sync the HW-blocking state of all rfkill switches,
1153 * do notice it causes the rfkill core to schedule uevents
1154 */
1155 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1156 {
1157 unsigned int i;
1158 struct tpacpi_rfk *tp_rfk;
1159
1160 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1161 tp_rfk = tpacpi_rfkill_switches[i];
1162 if (tp_rfk) {
1163 if (rfkill_set_hw_state(tp_rfk->rfkill,
1164 blocked)) {
1165 /* ignore -- we track sw block */
1166 }
1167 }
1168 }
1169 }
1170
1171 /* Call to get the WLSW state from the firmware */
1172 static int hotkey_get_wlsw(void);
1173
1174 /* Call to query WLSW state and update all rfkill switches */
1175 static bool tpacpi_rfk_check_hwblock_state(void)
1176 {
1177 int res = hotkey_get_wlsw();
1178 int hw_blocked;
1179
1180 /* When unknown or unsupported, we have to assume it is unblocked */
1181 if (res < 0)
1182 return false;
1183
1184 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1185 tpacpi_rfk_update_hwblock_state(hw_blocked);
1186
1187 return hw_blocked;
1188 }
1189
1190 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1191 {
1192 struct tpacpi_rfk *tp_rfk = data;
1193 int res;
1194
1195 dbg_printk(TPACPI_DBG_RFKILL,
1196 "request to change radio state to %s\n",
1197 blocked ? "blocked" : "unblocked");
1198
1199 /* try to set radio state */
1200 res = (tp_rfk->ops->set_status)(blocked ?
1201 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1202
1203 /* and update the rfkill core with whatever the FW really did */
1204 tpacpi_rfk_update_swstate(tp_rfk);
1205
1206 return (res < 0) ? res : 0;
1207 }
1208
1209 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1210 .set_block = tpacpi_rfk_hook_set_block,
1211 };
1212
1213 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1214 const struct tpacpi_rfk_ops *tp_rfkops,
1215 const enum rfkill_type rfktype,
1216 const char *name,
1217 const bool set_default)
1218 {
1219 struct tpacpi_rfk *atp_rfk;
1220 int res;
1221 bool sw_state = false;
1222 int sw_status;
1223
1224 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1225
1226 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1227 if (atp_rfk)
1228 atp_rfk->rfkill = rfkill_alloc(name,
1229 &tpacpi_pdev->dev,
1230 rfktype,
1231 &tpacpi_rfk_rfkill_ops,
1232 atp_rfk);
1233 if (!atp_rfk || !atp_rfk->rfkill) {
1234 printk(TPACPI_ERR
1235 "failed to allocate memory for rfkill class\n");
1236 kfree(atp_rfk);
1237 return -ENOMEM;
1238 }
1239
1240 atp_rfk->id = id;
1241 atp_rfk->ops = tp_rfkops;
1242
1243 sw_status = (tp_rfkops->get_status)();
1244 if (sw_status < 0) {
1245 printk(TPACPI_ERR
1246 "failed to read initial state for %s, error %d\n",
1247 name, sw_status);
1248 } else {
1249 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1250 if (set_default) {
1251 /* try to keep the initial state, since we ask the
1252 * firmware to preserve it across S5 in NVRAM */
1253 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1254 }
1255 }
1256 rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1257
1258 res = rfkill_register(atp_rfk->rfkill);
1259 if (res < 0) {
1260 printk(TPACPI_ERR
1261 "failed to register %s rfkill switch: %d\n",
1262 name, res);
1263 rfkill_destroy(atp_rfk->rfkill);
1264 kfree(atp_rfk);
1265 return res;
1266 }
1267
1268 tpacpi_rfkill_switches[id] = atp_rfk;
1269 return 0;
1270 }
1271
1272 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1273 {
1274 struct tpacpi_rfk *tp_rfk;
1275
1276 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1277
1278 tp_rfk = tpacpi_rfkill_switches[id];
1279 if (tp_rfk) {
1280 rfkill_unregister(tp_rfk->rfkill);
1281 tpacpi_rfkill_switches[id] = NULL;
1282 kfree(tp_rfk);
1283 }
1284 }
1285
1286 static void printk_deprecated_rfkill_attribute(const char * const what)
1287 {
1288 printk_deprecated_attribute(what,
1289 "Please switch to generic rfkill before year 2010");
1290 }
1291
1292 /* sysfs <radio> enable ------------------------------------------------ */
1293 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1294 struct device_attribute *attr,
1295 char *buf)
1296 {
1297 int status;
1298
1299 printk_deprecated_rfkill_attribute(attr->attr.name);
1300
1301 /* This is in the ABI... */
1302 if (tpacpi_rfk_check_hwblock_state()) {
1303 status = TPACPI_RFK_RADIO_OFF;
1304 } else {
1305 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1306 if (status < 0)
1307 return status;
1308 }
1309
1310 return snprintf(buf, PAGE_SIZE, "%d\n",
1311 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1312 }
1313
1314 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1315 struct device_attribute *attr,
1316 const char *buf, size_t count)
1317 {
1318 unsigned long t;
1319 int res;
1320
1321 printk_deprecated_rfkill_attribute(attr->attr.name);
1322
1323 if (parse_strtoul(buf, 1, &t))
1324 return -EINVAL;
1325
1326 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1327
1328 /* This is in the ABI... */
1329 if (tpacpi_rfk_check_hwblock_state() && !!t)
1330 return -EPERM;
1331
1332 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1333 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1334 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1335
1336 return (res < 0) ? res : count;
1337 }
1338
1339 /* procfs -------------------------------------------------------------- */
1340 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1341 {
1342 int len = 0;
1343
1344 if (id >= TPACPI_RFK_SW_MAX)
1345 len += sprintf(p + len, "status:\t\tnot supported\n");
1346 else {
1347 int status;
1348
1349 /* This is in the ABI... */
1350 if (tpacpi_rfk_check_hwblock_state()) {
1351 status = TPACPI_RFK_RADIO_OFF;
1352 } else {
1353 status = tpacpi_rfk_update_swstate(
1354 tpacpi_rfkill_switches[id]);
1355 if (status < 0)
1356 return status;
1357 }
1358
1359 len += sprintf(p + len, "status:\t\t%s\n",
1360 (status == TPACPI_RFK_RADIO_ON) ?
1361 "enabled" : "disabled");
1362 len += sprintf(p + len, "commands:\tenable, disable\n");
1363 }
1364
1365 return len;
1366 }
1367
1368 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1369 {
1370 char *cmd;
1371 int status = -1;
1372 int res = 0;
1373
1374 if (id >= TPACPI_RFK_SW_MAX)
1375 return -ENODEV;
1376
1377 while ((cmd = next_cmd(&buf))) {
1378 if (strlencmp(cmd, "enable") == 0)
1379 status = TPACPI_RFK_RADIO_ON;
1380 else if (strlencmp(cmd, "disable") == 0)
1381 status = TPACPI_RFK_RADIO_OFF;
1382 else
1383 return -EINVAL;
1384 }
1385
1386 if (status != -1) {
1387 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1388 (status == TPACPI_RFK_RADIO_ON) ?
1389 "enable" : "disable",
1390 tpacpi_rfkill_names[id]);
1391 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1392 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1393 }
1394
1395 return res;
1396 }
1397
1398 /*************************************************************************
1399 * thinkpad-acpi driver attributes
1400 */
1401
1402 /* interface_version --------------------------------------------------- */
1403 static ssize_t tpacpi_driver_interface_version_show(
1404 struct device_driver *drv,
1405 char *buf)
1406 {
1407 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1408 }
1409
1410 static DRIVER_ATTR(interface_version, S_IRUGO,
1411 tpacpi_driver_interface_version_show, NULL);
1412
1413 /* debug_level --------------------------------------------------------- */
1414 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1415 char *buf)
1416 {
1417 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1418 }
1419
1420 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1421 const char *buf, size_t count)
1422 {
1423 unsigned long t;
1424
1425 if (parse_strtoul(buf, 0xffff, &t))
1426 return -EINVAL;
1427
1428 dbg_level = t;
1429
1430 return count;
1431 }
1432
1433 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1434 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1435
1436 /* version ------------------------------------------------------------- */
1437 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1438 char *buf)
1439 {
1440 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1441 TPACPI_DESC, TPACPI_VERSION);
1442 }
1443
1444 static DRIVER_ATTR(version, S_IRUGO,
1445 tpacpi_driver_version_show, NULL);
1446
1447 /* --------------------------------------------------------------------- */
1448
1449 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1450
1451 /* wlsw_emulstate ------------------------------------------------------ */
1452 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1453 char *buf)
1454 {
1455 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1456 }
1457
1458 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1459 const char *buf, size_t count)
1460 {
1461 unsigned long t;
1462
1463 if (parse_strtoul(buf, 1, &t))
1464 return -EINVAL;
1465
1466 if (tpacpi_wlsw_emulstate != !!t) {
1467 tpacpi_wlsw_emulstate = !!t;
1468 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1469 }
1470
1471 return count;
1472 }
1473
1474 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1475 tpacpi_driver_wlsw_emulstate_show,
1476 tpacpi_driver_wlsw_emulstate_store);
1477
1478 /* bluetooth_emulstate ------------------------------------------------- */
1479 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1480 struct device_driver *drv,
1481 char *buf)
1482 {
1483 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1484 }
1485
1486 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1487 struct device_driver *drv,
1488 const char *buf, size_t count)
1489 {
1490 unsigned long t;
1491
1492 if (parse_strtoul(buf, 1, &t))
1493 return -EINVAL;
1494
1495 tpacpi_bluetooth_emulstate = !!t;
1496
1497 return count;
1498 }
1499
1500 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1501 tpacpi_driver_bluetooth_emulstate_show,
1502 tpacpi_driver_bluetooth_emulstate_store);
1503
1504 /* wwan_emulstate ------------------------------------------------- */
1505 static ssize_t tpacpi_driver_wwan_emulstate_show(
1506 struct device_driver *drv,
1507 char *buf)
1508 {
1509 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1510 }
1511
1512 static ssize_t tpacpi_driver_wwan_emulstate_store(
1513 struct device_driver *drv,
1514 const char *buf, size_t count)
1515 {
1516 unsigned long t;
1517
1518 if (parse_strtoul(buf, 1, &t))
1519 return -EINVAL;
1520
1521 tpacpi_wwan_emulstate = !!t;
1522
1523 return count;
1524 }
1525
1526 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1527 tpacpi_driver_wwan_emulstate_show,
1528 tpacpi_driver_wwan_emulstate_store);
1529
1530 /* uwb_emulstate ------------------------------------------------- */
1531 static ssize_t tpacpi_driver_uwb_emulstate_show(
1532 struct device_driver *drv,
1533 char *buf)
1534 {
1535 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1536 }
1537
1538 static ssize_t tpacpi_driver_uwb_emulstate_store(
1539 struct device_driver *drv,
1540 const char *buf, size_t count)
1541 {
1542 unsigned long t;
1543
1544 if (parse_strtoul(buf, 1, &t))
1545 return -EINVAL;
1546
1547 tpacpi_uwb_emulstate = !!t;
1548
1549 return count;
1550 }
1551
1552 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1553 tpacpi_driver_uwb_emulstate_show,
1554 tpacpi_driver_uwb_emulstate_store);
1555 #endif
1556
1557 /* --------------------------------------------------------------------- */
1558
1559 static struct driver_attribute *tpacpi_driver_attributes[] = {
1560 &driver_attr_debug_level, &driver_attr_version,
1561 &driver_attr_interface_version,
1562 };
1563
1564 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1565 {
1566 int i, res;
1567
1568 i = 0;
1569 res = 0;
1570 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1571 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1572 i++;
1573 }
1574
1575 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1576 if (!res && dbg_wlswemul)
1577 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1578 if (!res && dbg_bluetoothemul)
1579 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1580 if (!res && dbg_wwanemul)
1581 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1582 if (!res && dbg_uwbemul)
1583 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1584 #endif
1585
1586 return res;
1587 }
1588
1589 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1590 {
1591 int i;
1592
1593 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1594 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1595
1596 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1597 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1598 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1599 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1600 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1601 #endif
1602 }
1603
1604 /*************************************************************************
1605 * Firmware Data
1606 */
1607
1608 /*
1609 * Table of recommended minimum BIOS versions
1610 *
1611 * Reasons for listing:
1612 * 1. Stable BIOS, listed because the unknown ammount of
1613 * bugs and bad ACPI behaviour on older versions
1614 *
1615 * 2. BIOS or EC fw with known bugs that trigger on Linux
1616 *
1617 * 3. BIOS with known reduced functionality in older versions
1618 *
1619 * We recommend the latest BIOS and EC version.
1620 * We only support the latest BIOS and EC fw version as a rule.
1621 *
1622 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1623 * Information from users in ThinkWiki
1624 *
1625 * WARNING: we use this table also to detect that the machine is
1626 * a ThinkPad in some cases, so don't remove entries lightly.
1627 */
1628
1629 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1630 { .vendor = (__v), \
1631 .bios = TPID(__id1, __id2), \
1632 .ec = TPACPI_MATCH_ANY, \
1633 .quirks = TPACPI_MATCH_ANY << 16 \
1634 | (__bv1) << 8 | (__bv2) }
1635
1636 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1637 __eid1, __eid2, __ev1, __ev2) \
1638 { .vendor = (__v), \
1639 .bios = TPID(__bid1, __bid2), \
1640 .ec = TPID(__eid1, __eid2), \
1641 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1642 | (__bv1) << 8 | (__bv2) }
1643
1644 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1645 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1646
1647 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1648 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1649 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1650
1651 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1652 __eid1, __eid2, __ev1, __ev2) \
1653 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1654 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1655
1656 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1657 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1658
1659 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1660 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1661 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1662
1663 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1664 __eid1, __eid2, __ev1, __ev2) \
1665 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1666 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1667
1668 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1669 /* Numeric models ------------------ */
1670 /* FW MODEL BIOS VERS */
1671 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1672 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1673 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1674 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1675 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1676 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1677 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1678 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1679 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1680
1681 /* A-series ------------------------- */
1682 /* FW MODEL BIOS VERS EC VERS */
1683 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1684 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1685 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1686 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1687 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1688 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1689 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1690 TPV_QI0('1', '3', '2', '0'), /* A22m */
1691 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1692 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1693 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1694
1695 /* G-series ------------------------- */
1696 /* FW MODEL BIOS VERS */
1697 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1698 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1699
1700 /* R-series, T-series --------------- */
1701 /* FW MODEL BIOS VERS EC VERS */
1702 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1703 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1704 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1705 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1706 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1707 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1708 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1709 T40/p, T41/p, T42/p (1) */
1710 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1711 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1712 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1713 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1714
1715 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1716 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1717 TPV_QI0('1', '6', '3', '2'), /* T22 */
1718 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1719 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1720 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1721
1722 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1723 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1724 TPV_QL0('7', 'E', 'D', '0'), /* R60e, R60i */
1725
1726 /* BIOS FW BIOS VERS EC FW EC VERS */
1727 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1728 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1729
1730 /* X-series ------------------------- */
1731 /* FW MODEL BIOS VERS EC VERS */
1732 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1733 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1734 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1735 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1736 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1737 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1738 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1739
1740 TPV_QL0('7', 'B', 'D', '7'), /* X60/s */
1741 TPV_QL0('7', 'J', '3', '0'), /* X60t */
1742
1743 /* (0) - older versions lack DMI EC fw string and functionality */
1744 /* (1) - older versions known to lack functionality */
1745 };
1746
1747 #undef TPV_QL1
1748 #undef TPV_QL0
1749 #undef TPV_QI2
1750 #undef TPV_QI1
1751 #undef TPV_QI0
1752 #undef TPV_Q_X
1753 #undef TPV_Q
1754
1755 static void __init tpacpi_check_outdated_fw(void)
1756 {
1757 unsigned long fwvers;
1758 u16 ec_version, bios_version;
1759
1760 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1761 ARRAY_SIZE(tpacpi_bios_version_qtable));
1762
1763 if (!fwvers)
1764 return;
1765
1766 bios_version = fwvers & 0xffffU;
1767 ec_version = (fwvers >> 16) & 0xffffU;
1768
1769 /* note that unknown versions are set to 0x0000 and we use that */
1770 if ((bios_version > thinkpad_id.bios_release) ||
1771 (ec_version > thinkpad_id.ec_release &&
1772 ec_version != TPACPI_MATCH_ANY)) {
1773 /*
1774 * The changelogs would let us track down the exact
1775 * reason, but it is just too much of a pain to track
1776 * it. We only list BIOSes that are either really
1777 * broken, or really stable to begin with, so it is
1778 * best if the user upgrades the firmware anyway.
1779 */
1780 printk(TPACPI_WARN
1781 "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1782 printk(TPACPI_WARN
1783 "WARNING: This firmware may be missing critical bug "
1784 "fixes and/or important features\n");
1785 }
1786 }
1787
1788 static bool __init tpacpi_is_fw_known(void)
1789 {
1790 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1791 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1792 }
1793
1794 /****************************************************************************
1795 ****************************************************************************
1796 *
1797 * Subdrivers
1798 *
1799 ****************************************************************************
1800 ****************************************************************************/
1801
1802 /*************************************************************************
1803 * thinkpad-acpi init subdriver
1804 */
1805
1806 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1807 {
1808 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1809 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1810
1811 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1812 (thinkpad_id.bios_version_str) ?
1813 thinkpad_id.bios_version_str : "unknown",
1814 (thinkpad_id.ec_version_str) ?
1815 thinkpad_id.ec_version_str : "unknown");
1816
1817 if (thinkpad_id.vendor && thinkpad_id.model_str)
1818 printk(TPACPI_INFO "%s %s, model %s\n",
1819 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1820 "IBM" : ((thinkpad_id.vendor ==
1821 PCI_VENDOR_ID_LENOVO) ?
1822 "Lenovo" : "Unknown vendor"),
1823 thinkpad_id.model_str,
1824 (thinkpad_id.nummodel_str) ?
1825 thinkpad_id.nummodel_str : "unknown");
1826
1827 tpacpi_check_outdated_fw();
1828 return 0;
1829 }
1830
1831 static int thinkpad_acpi_driver_read(char *p)
1832 {
1833 int len = 0;
1834
1835 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1836 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1837
1838 return len;
1839 }
1840
1841 static struct ibm_struct thinkpad_acpi_driver_data = {
1842 .name = "driver",
1843 .read = thinkpad_acpi_driver_read,
1844 };
1845
1846 /*************************************************************************
1847 * Hotkey subdriver
1848 */
1849
1850 enum { /* hot key scan codes (derived from ACPI DSDT) */
1851 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1852 TP_ACPI_HOTKEYSCAN_FNF2,
1853 TP_ACPI_HOTKEYSCAN_FNF3,
1854 TP_ACPI_HOTKEYSCAN_FNF4,
1855 TP_ACPI_HOTKEYSCAN_FNF5,
1856 TP_ACPI_HOTKEYSCAN_FNF6,
1857 TP_ACPI_HOTKEYSCAN_FNF7,
1858 TP_ACPI_HOTKEYSCAN_FNF8,
1859 TP_ACPI_HOTKEYSCAN_FNF9,
1860 TP_ACPI_HOTKEYSCAN_FNF10,
1861 TP_ACPI_HOTKEYSCAN_FNF11,
1862 TP_ACPI_HOTKEYSCAN_FNF12,
1863 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1864 TP_ACPI_HOTKEYSCAN_FNINSERT,
1865 TP_ACPI_HOTKEYSCAN_FNDELETE,
1866 TP_ACPI_HOTKEYSCAN_FNHOME,
1867 TP_ACPI_HOTKEYSCAN_FNEND,
1868 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1869 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1870 TP_ACPI_HOTKEYSCAN_FNSPACE,
1871 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1872 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1873 TP_ACPI_HOTKEYSCAN_MUTE,
1874 TP_ACPI_HOTKEYSCAN_THINKPAD,
1875 };
1876
1877 enum { /* Keys available through NVRAM polling */
1878 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1879 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1880 };
1881
1882 enum { /* Positions of some of the keys in hotkey masks */
1883 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1884 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1885 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1886 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1887 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1888 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1889 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1890 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1891 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1892 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1893 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1894 };
1895
1896 enum { /* NVRAM to ACPI HKEY group map */
1897 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1898 TP_ACPI_HKEY_ZOOM_MASK |
1899 TP_ACPI_HKEY_DISPSWTCH_MASK |
1900 TP_ACPI_HKEY_HIBERNATE_MASK,
1901 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1902 TP_ACPI_HKEY_BRGHTDWN_MASK,
1903 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1904 TP_ACPI_HKEY_VOLDWN_MASK |
1905 TP_ACPI_HKEY_MUTE_MASK,
1906 };
1907
1908 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1909 struct tp_nvram_state {
1910 u16 thinkpad_toggle:1;
1911 u16 zoom_toggle:1;
1912 u16 display_toggle:1;
1913 u16 thinklight_toggle:1;
1914 u16 hibernate_toggle:1;
1915 u16 displayexp_toggle:1;
1916 u16 display_state:1;
1917 u16 brightness_toggle:1;
1918 u16 volume_toggle:1;
1919 u16 mute:1;
1920
1921 u8 brightness_level;
1922 u8 volume_level;
1923 };
1924
1925 /* kthread for the hotkey poller */
1926 static struct task_struct *tpacpi_hotkey_task;
1927
1928 /* Acquired while the poller kthread is running, use to sync start/stop */
1929 static struct mutex hotkey_thread_mutex;
1930
1931 /*
1932 * Acquire mutex to write poller control variables.
1933 * Increment hotkey_config_change when changing them.
1934 *
1935 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1936 */
1937 static struct mutex hotkey_thread_data_mutex;
1938 static unsigned int hotkey_config_change;
1939
1940 /*
1941 * hotkey poller control variables
1942 *
1943 * Must be atomic or readers will also need to acquire mutex
1944 */
1945 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1946 static unsigned int hotkey_poll_freq = 10; /* Hz */
1947
1948 #define HOTKEY_CONFIG_CRITICAL_START \
1949 do { \
1950 mutex_lock(&hotkey_thread_data_mutex); \
1951 hotkey_config_change++; \
1952 } while (0);
1953 #define HOTKEY_CONFIG_CRITICAL_END \
1954 mutex_unlock(&hotkey_thread_data_mutex);
1955
1956 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1957
1958 #define hotkey_source_mask 0U
1959 #define HOTKEY_CONFIG_CRITICAL_START
1960 #define HOTKEY_CONFIG_CRITICAL_END
1961
1962 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1963
1964 static struct mutex hotkey_mutex;
1965
1966 static enum { /* Reasons for waking up */
1967 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1968 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1969 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1970 } hotkey_wakeup_reason;
1971
1972 static int hotkey_autosleep_ack;
1973
1974 static u32 hotkey_orig_mask;
1975 static u32 hotkey_all_mask;
1976 static u32 hotkey_reserved_mask;
1977 static u32 hotkey_mask;
1978
1979 static unsigned int hotkey_report_mode;
1980
1981 static u16 *hotkey_keycode_map;
1982
1983 static struct attribute_set *hotkey_dev_attributes;
1984
1985 /* HKEY.MHKG() return bits */
1986 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1987
1988 static int hotkey_get_wlsw(void)
1989 {
1990 int status;
1991
1992 if (!tp_features.hotkey_wlsw)
1993 return -ENODEV;
1994
1995 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1996 if (dbg_wlswemul)
1997 return (tpacpi_wlsw_emulstate) ?
1998 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1999 #endif
2000
2001 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2002 return -EIO;
2003
2004 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2005 }
2006
2007 static int hotkey_get_tablet_mode(int *status)
2008 {
2009 int s;
2010
2011 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2012 return -EIO;
2013
2014 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2015 return 0;
2016 }
2017
2018 /*
2019 * Call with hotkey_mutex held
2020 */
2021 static int hotkey_mask_get(void)
2022 {
2023 u32 m = 0;
2024
2025 if (tp_features.hotkey_mask) {
2026 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2027 return -EIO;
2028 }
2029 HOTKEY_CONFIG_CRITICAL_START
2030 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
2031 HOTKEY_CONFIG_CRITICAL_END
2032
2033 return 0;
2034 }
2035
2036 /*
2037 * Call with hotkey_mutex held
2038 */
2039 static int hotkey_mask_set(u32 mask)
2040 {
2041 int i;
2042 int rc = 0;
2043
2044 if (tp_features.hotkey_mask) {
2045 if (!tp_warned.hotkey_mask_ff &&
2046 (mask == 0xffff || mask == 0xffffff ||
2047 mask == 0xffffffff)) {
2048 tp_warned.hotkey_mask_ff = 1;
2049 printk(TPACPI_NOTICE
2050 "setting the hotkey mask to 0x%08x is likely "
2051 "not the best way to go about it\n", mask);
2052 printk(TPACPI_NOTICE
2053 "please consider using the driver defaults, "
2054 "and refer to up-to-date thinkpad-acpi "
2055 "documentation\n");
2056 }
2057
2058 HOTKEY_CONFIG_CRITICAL_START
2059 for (i = 0; i < 32; i++) {
2060 u32 m = 1 << i;
2061 /* enable in firmware mask only keys not in NVRAM
2062 * mode, but enable the key in the cached hotkey_mask
2063 * regardless of mode, or the key will end up
2064 * disabled by hotkey_mask_get() */
2065 if (!acpi_evalf(hkey_handle,
2066 NULL, "MHKM", "vdd", i + 1,
2067 !!((mask & ~hotkey_source_mask) & m))) {
2068 rc = -EIO;
2069 break;
2070 } else {
2071 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
2072 }
2073 }
2074 HOTKEY_CONFIG_CRITICAL_END
2075
2076 /* hotkey_mask_get must be called unconditionally below */
2077 if (!hotkey_mask_get() && !rc &&
2078 (hotkey_mask & ~hotkey_source_mask) !=
2079 (mask & ~hotkey_source_mask)) {
2080 printk(TPACPI_NOTICE
2081 "requested hot key mask 0x%08x, but "
2082 "firmware forced it to 0x%08x\n",
2083 mask, hotkey_mask);
2084 }
2085 } else {
2086 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2087 HOTKEY_CONFIG_CRITICAL_START
2088 hotkey_mask = mask & hotkey_source_mask;
2089 HOTKEY_CONFIG_CRITICAL_END
2090 hotkey_mask_get();
2091 if (hotkey_mask != mask) {
2092 printk(TPACPI_NOTICE
2093 "requested hot key mask 0x%08x, "
2094 "forced to 0x%08x (NVRAM poll mask is "
2095 "0x%08x): no firmware mask support\n",
2096 mask, hotkey_mask, hotkey_source_mask);
2097 }
2098 #else
2099 hotkey_mask_get();
2100 rc = -ENXIO;
2101 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2102 }
2103
2104 return rc;
2105 }
2106
2107 static int hotkey_status_get(int *status)
2108 {
2109 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2110 return -EIO;
2111
2112 return 0;
2113 }
2114
2115 static int hotkey_status_set(bool enable)
2116 {
2117 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2118 return -EIO;
2119
2120 return 0;
2121 }
2122
2123 static void tpacpi_input_send_tabletsw(void)
2124 {
2125 int state;
2126
2127 if (tp_features.hotkey_tablet &&
2128 !hotkey_get_tablet_mode(&state)) {
2129 mutex_lock(&tpacpi_inputdev_send_mutex);
2130
2131 input_report_switch(tpacpi_inputdev,
2132 SW_TABLET_MODE, !!state);
2133 input_sync(tpacpi_inputdev);
2134
2135 mutex_unlock(&tpacpi_inputdev_send_mutex);
2136 }
2137 }
2138
2139 static void tpacpi_input_send_key(unsigned int scancode)
2140 {
2141 unsigned int keycode;
2142
2143 keycode = hotkey_keycode_map[scancode];
2144
2145 if (keycode != KEY_RESERVED) {
2146 mutex_lock(&tpacpi_inputdev_send_mutex);
2147
2148 input_report_key(tpacpi_inputdev, keycode, 1);
2149 if (keycode == KEY_UNKNOWN)
2150 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2151 scancode);
2152 input_sync(tpacpi_inputdev);
2153
2154 input_report_key(tpacpi_inputdev, keycode, 0);
2155 if (keycode == KEY_UNKNOWN)
2156 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2157 scancode);
2158 input_sync(tpacpi_inputdev);
2159
2160 mutex_unlock(&tpacpi_inputdev_send_mutex);
2161 }
2162 }
2163
2164 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2165 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2166
2167 static void tpacpi_hotkey_send_key(unsigned int scancode)
2168 {
2169 tpacpi_input_send_key(scancode);
2170 if (hotkey_report_mode < 2) {
2171 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2172 0x80, 0x1001 + scancode);
2173 }
2174 }
2175
2176 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
2177 {
2178 u8 d;
2179
2180 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2181 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2182 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2183 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2184 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2185 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2186 }
2187 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2188 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2189 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2190 }
2191 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2192 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2193 n->displayexp_toggle =
2194 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2195 }
2196 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2197 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2198 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2199 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2200 n->brightness_toggle =
2201 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2202 }
2203 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2204 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2205 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2206 >> TP_NVRAM_POS_LEVEL_VOLUME;
2207 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2208 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2209 }
2210 }
2211
2212 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2213 do { \
2214 if ((mask & (1 << __scancode)) && \
2215 oldn->__member != newn->__member) \
2216 tpacpi_hotkey_send_key(__scancode); \
2217 } while (0)
2218
2219 #define TPACPI_MAY_SEND_KEY(__scancode) \
2220 do { if (mask & (1 << __scancode)) \
2221 tpacpi_hotkey_send_key(__scancode); } while (0)
2222
2223 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2224 struct tp_nvram_state *newn,
2225 u32 mask)
2226 {
2227 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2228 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2229 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2230 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2231
2232 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2233
2234 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2235
2236 /* handle volume */
2237 if (oldn->volume_toggle != newn->volume_toggle) {
2238 if (oldn->mute != newn->mute) {
2239 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2240 }
2241 if (oldn->volume_level > newn->volume_level) {
2242 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2243 } else if (oldn->volume_level < newn->volume_level) {
2244 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2245 } else if (oldn->mute == newn->mute) {
2246 /* repeated key presses that didn't change state */
2247 if (newn->mute) {
2248 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2249 } else if (newn->volume_level != 0) {
2250 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2251 } else {
2252 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2253 }
2254 }
2255 }
2256
2257 /* handle brightness */
2258 if (oldn->brightness_toggle != newn->brightness_toggle) {
2259 if (oldn->brightness_level < newn->brightness_level) {
2260 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2261 } else if (oldn->brightness_level > newn->brightness_level) {
2262 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2263 } else {
2264 /* repeated key presses that didn't change state */
2265 if (newn->brightness_level != 0) {
2266 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2267 } else {
2268 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2269 }
2270 }
2271 }
2272 }
2273
2274 #undef TPACPI_COMPARE_KEY
2275 #undef TPACPI_MAY_SEND_KEY
2276
2277 static int hotkey_kthread(void *data)
2278 {
2279 struct tp_nvram_state s[2];
2280 u32 mask;
2281 unsigned int si, so;
2282 unsigned long t;
2283 unsigned int change_detector, must_reset;
2284 unsigned int poll_freq;
2285
2286 mutex_lock(&hotkey_thread_mutex);
2287
2288 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2289 goto exit;
2290
2291 set_freezable();
2292
2293 so = 0;
2294 si = 1;
2295 t = 0;
2296
2297 /* Initial state for compares */
2298 mutex_lock(&hotkey_thread_data_mutex);
2299 change_detector = hotkey_config_change;
2300 mask = hotkey_source_mask & hotkey_mask;
2301 poll_freq = hotkey_poll_freq;
2302 mutex_unlock(&hotkey_thread_data_mutex);
2303 hotkey_read_nvram(&s[so], mask);
2304
2305 while (!kthread_should_stop()) {
2306 if (t == 0) {
2307 if (likely(poll_freq))
2308 t = 1000/poll_freq;
2309 else
2310 t = 100; /* should never happen... */
2311 }
2312 t = msleep_interruptible(t);
2313 if (unlikely(kthread_should_stop()))
2314 break;
2315 must_reset = try_to_freeze();
2316 if (t > 0 && !must_reset)
2317 continue;
2318
2319 mutex_lock(&hotkey_thread_data_mutex);
2320 if (must_reset || hotkey_config_change != change_detector) {
2321 /* forget old state on thaw or config change */
2322 si = so;
2323 t = 0;
2324 change_detector = hotkey_config_change;
2325 }
2326 mask = hotkey_source_mask & hotkey_mask;
2327 poll_freq = hotkey_poll_freq;
2328 mutex_unlock(&hotkey_thread_data_mutex);
2329
2330 if (likely(mask)) {
2331 hotkey_read_nvram(&s[si], mask);
2332 if (likely(si != so)) {
2333 hotkey_compare_and_issue_event(&s[so], &s[si],
2334 mask);
2335 }
2336 }
2337
2338 so = si;
2339 si ^= 1;
2340 }
2341
2342 exit:
2343 mutex_unlock(&hotkey_thread_mutex);
2344 return 0;
2345 }
2346
2347 /* call with hotkey_mutex held */
2348 static void hotkey_poll_stop_sync(void)
2349 {
2350 if (tpacpi_hotkey_task) {
2351 if (frozen(tpacpi_hotkey_task) ||
2352 freezing(tpacpi_hotkey_task))
2353 thaw_process(tpacpi_hotkey_task);
2354
2355 kthread_stop(tpacpi_hotkey_task);
2356 tpacpi_hotkey_task = NULL;
2357 mutex_lock(&hotkey_thread_mutex);
2358 /* at this point, the thread did exit */
2359 mutex_unlock(&hotkey_thread_mutex);
2360 }
2361 }
2362
2363 /* call with hotkey_mutex held */
2364 static void hotkey_poll_setup(bool may_warn)
2365 {
2366 u32 hotkeys_to_poll = hotkey_source_mask & hotkey_mask;
2367
2368 if (hotkeys_to_poll != 0 && hotkey_poll_freq > 0 &&
2369 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2370 if (!tpacpi_hotkey_task) {
2371 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2372 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2373 if (IS_ERR(tpacpi_hotkey_task)) {
2374 tpacpi_hotkey_task = NULL;
2375 printk(TPACPI_ERR
2376 "could not create kernel thread "
2377 "for hotkey polling\n");
2378 }
2379 }
2380 } else {
2381 hotkey_poll_stop_sync();
2382 if (may_warn && hotkeys_to_poll != 0 &&
2383 hotkey_poll_freq == 0) {
2384 printk(TPACPI_NOTICE
2385 "hot keys 0x%08x require polling, "
2386 "which is currently disabled\n",
2387 hotkeys_to_poll);
2388 }
2389 }
2390 }
2391
2392 static void hotkey_poll_setup_safe(bool may_warn)
2393 {
2394 mutex_lock(&hotkey_mutex);
2395 hotkey_poll_setup(may_warn);
2396 mutex_unlock(&hotkey_mutex);
2397 }
2398
2399 /* call with hotkey_mutex held */
2400 static void hotkey_poll_set_freq(unsigned int freq)
2401 {
2402 if (!freq)
2403 hotkey_poll_stop_sync();
2404
2405 HOTKEY_CONFIG_CRITICAL_START
2406 hotkey_poll_freq = freq;
2407 HOTKEY_CONFIG_CRITICAL_END
2408 }
2409
2410 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2411
2412 static void hotkey_poll_setup_safe(bool __unused)
2413 {
2414 }
2415
2416 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2417
2418 static int hotkey_inputdev_open(struct input_dev *dev)
2419 {
2420 switch (tpacpi_lifecycle) {
2421 case TPACPI_LIFE_INIT:
2422 /*
2423 * hotkey_init will call hotkey_poll_setup_safe
2424 * at the appropriate moment
2425 */
2426 return 0;
2427 case TPACPI_LIFE_EXITING:
2428 return -EBUSY;
2429 case TPACPI_LIFE_RUNNING:
2430 hotkey_poll_setup_safe(false);
2431 return 0;
2432 }
2433
2434 /* Should only happen if tpacpi_lifecycle is corrupt */
2435 BUG();
2436 return -EBUSY;
2437 }
2438
2439 static void hotkey_inputdev_close(struct input_dev *dev)
2440 {
2441 /* disable hotkey polling when possible */
2442 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2443 hotkey_poll_setup_safe(false);
2444 }
2445
2446 /* sysfs hotkey enable ------------------------------------------------- */
2447 static ssize_t hotkey_enable_show(struct device *dev,
2448 struct device_attribute *attr,
2449 char *buf)
2450 {
2451 int res, status;
2452
2453 printk_deprecated_attribute("hotkey_enable",
2454 "Hotkey reporting is always enabled");
2455
2456 res = hotkey_status_get(&status);
2457 if (res)
2458 return res;
2459
2460 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2461 }
2462
2463 static ssize_t hotkey_enable_store(struct device *dev,
2464 struct device_attribute *attr,
2465 const char *buf, size_t count)
2466 {
2467 unsigned long t;
2468
2469 printk_deprecated_attribute("hotkey_enable",
2470 "Hotkeys can be disabled through hotkey_mask");
2471
2472 if (parse_strtoul(buf, 1, &t))
2473 return -EINVAL;
2474
2475 if (t == 0)
2476 return -EPERM;
2477
2478 return count;
2479 }
2480
2481 static struct device_attribute dev_attr_hotkey_enable =
2482 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2483 hotkey_enable_show, hotkey_enable_store);
2484
2485 /* sysfs hotkey mask --------------------------------------------------- */
2486 static ssize_t hotkey_mask_show(struct device *dev,
2487 struct device_attribute *attr,
2488 char *buf)
2489 {
2490 int res;
2491
2492 if (mutex_lock_killable(&hotkey_mutex))
2493 return -ERESTARTSYS;
2494 res = hotkey_mask_get();
2495 mutex_unlock(&hotkey_mutex);
2496
2497 return (res)?
2498 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2499 }
2500
2501 static ssize_t hotkey_mask_store(struct device *dev,
2502 struct device_attribute *attr,
2503 const char *buf, size_t count)
2504 {
2505 unsigned long t;
2506 int res;
2507
2508 if (parse_strtoul(buf, 0xffffffffUL, &t))
2509 return -EINVAL;
2510
2511 if (mutex_lock_killable(&hotkey_mutex))
2512 return -ERESTARTSYS;
2513
2514 res = hotkey_mask_set(t);
2515
2516 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2517 hotkey_poll_setup(true);
2518 #endif
2519
2520 mutex_unlock(&hotkey_mutex);
2521
2522 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2523
2524 return (res) ? res : count;
2525 }
2526
2527 static struct device_attribute dev_attr_hotkey_mask =
2528 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2529 hotkey_mask_show, hotkey_mask_store);
2530
2531 /* sysfs hotkey bios_enabled ------------------------------------------- */
2532 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2533 struct device_attribute *attr,
2534 char *buf)
2535 {
2536 return sprintf(buf, "0\n");
2537 }
2538
2539 static struct device_attribute dev_attr_hotkey_bios_enabled =
2540 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2541
2542 /* sysfs hotkey bios_mask ---------------------------------------------- */
2543 static ssize_t hotkey_bios_mask_show(struct device *dev,
2544 struct device_attribute *attr,
2545 char *buf)
2546 {
2547 printk_deprecated_attribute("hotkey_bios_mask",
2548 "This attribute is useless.");
2549 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2550 }
2551
2552 static struct device_attribute dev_attr_hotkey_bios_mask =
2553 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2554
2555 /* sysfs hotkey all_mask ----------------------------------------------- */
2556 static ssize_t hotkey_all_mask_show(struct device *dev,
2557 struct device_attribute *attr,
2558 char *buf)
2559 {
2560 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2561 hotkey_all_mask | hotkey_source_mask);
2562 }
2563
2564 static struct device_attribute dev_attr_hotkey_all_mask =
2565 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2566
2567 /* sysfs hotkey recommended_mask --------------------------------------- */
2568 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2569 struct device_attribute *attr,
2570 char *buf)
2571 {
2572 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2573 (hotkey_all_mask | hotkey_source_mask)
2574 & ~hotkey_reserved_mask);
2575 }
2576
2577 static struct device_attribute dev_attr_hotkey_recommended_mask =
2578 __ATTR(hotkey_recommended_mask, S_IRUGO,
2579 hotkey_recommended_mask_show, NULL);
2580
2581 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2582
2583 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2584 static ssize_t hotkey_source_mask_show(struct device *dev,
2585 struct device_attribute *attr,
2586 char *buf)
2587 {
2588 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2589 }
2590
2591 static ssize_t hotkey_source_mask_store(struct device *dev,
2592 struct device_attribute *attr,
2593 const char *buf, size_t count)
2594 {
2595 unsigned long t;
2596
2597 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2598 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2599 return -EINVAL;
2600
2601 if (mutex_lock_killable(&hotkey_mutex))
2602 return -ERESTARTSYS;
2603
2604 HOTKEY_CONFIG_CRITICAL_START
2605 hotkey_source_mask = t;
2606 HOTKEY_CONFIG_CRITICAL_END
2607
2608 hotkey_poll_setup(true);
2609 hotkey_mask_set(hotkey_mask);
2610
2611 mutex_unlock(&hotkey_mutex);
2612
2613 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2614
2615 return count;
2616 }
2617
2618 static struct device_attribute dev_attr_hotkey_source_mask =
2619 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2620 hotkey_source_mask_show, hotkey_source_mask_store);
2621
2622 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2623 static ssize_t hotkey_poll_freq_show(struct device *dev,
2624 struct device_attribute *attr,
2625 char *buf)
2626 {
2627 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2628 }
2629
2630 static ssize_t hotkey_poll_freq_store(struct device *dev,
2631 struct device_attribute *attr,
2632 const char *buf, size_t count)
2633 {
2634 unsigned long t;
2635
2636 if (parse_strtoul(buf, 25, &t))
2637 return -EINVAL;
2638
2639 if (mutex_lock_killable(&hotkey_mutex))
2640 return -ERESTARTSYS;
2641
2642 hotkey_poll_set_freq(t);
2643 hotkey_poll_setup(true);
2644
2645 mutex_unlock(&hotkey_mutex);
2646
2647 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2648
2649 return count;
2650 }
2651
2652 static struct device_attribute dev_attr_hotkey_poll_freq =
2653 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2654 hotkey_poll_freq_show, hotkey_poll_freq_store);
2655
2656 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2657
2658 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2659 static ssize_t hotkey_radio_sw_show(struct device *dev,
2660 struct device_attribute *attr,
2661 char *buf)
2662 {
2663 int res;
2664 res = hotkey_get_wlsw();
2665 if (res < 0)
2666 return res;
2667
2668 /* Opportunistic update */
2669 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2670
2671 return snprintf(buf, PAGE_SIZE, "%d\n",
2672 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2673 }
2674
2675 static struct device_attribute dev_attr_hotkey_radio_sw =
2676 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2677
2678 static void hotkey_radio_sw_notify_change(void)
2679 {
2680 if (tp_features.hotkey_wlsw)
2681 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2682 "hotkey_radio_sw");
2683 }
2684
2685 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2686 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2687 struct device_attribute *attr,
2688 char *buf)
2689 {
2690 int res, s;
2691 res = hotkey_get_tablet_mode(&s);
2692 if (res < 0)
2693 return res;
2694
2695 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2696 }
2697
2698 static struct device_attribute dev_attr_hotkey_tablet_mode =
2699 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2700
2701 static void hotkey_tablet_mode_notify_change(void)
2702 {
2703 if (tp_features.hotkey_tablet)
2704 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2705 "hotkey_tablet_mode");
2706 }
2707
2708 /* sysfs hotkey report_mode -------------------------------------------- */
2709 static ssize_t hotkey_report_mode_show(struct device *dev,
2710 struct device_attribute *attr,
2711 char *buf)
2712 {
2713 return snprintf(buf, PAGE_SIZE, "%d\n",
2714 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2715 }
2716
2717 static struct device_attribute dev_attr_hotkey_report_mode =
2718 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2719
2720 /* sysfs wakeup reason (pollable) -------------------------------------- */
2721 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2722 struct device_attribute *attr,
2723 char *buf)
2724 {
2725 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2726 }
2727
2728 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2729 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2730
2731 static void hotkey_wakeup_reason_notify_change(void)
2732 {
2733 if (tp_features.hotkey_mask)
2734 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2735 "wakeup_reason");
2736 }
2737
2738 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2739 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2740 struct device_attribute *attr,
2741 char *buf)
2742 {
2743 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2744 }
2745
2746 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2747 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2748 hotkey_wakeup_hotunplug_complete_show, NULL);
2749
2750 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2751 {
2752 if (tp_features.hotkey_mask)
2753 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2754 "wakeup_hotunplug_complete");
2755 }
2756
2757 /* --------------------------------------------------------------------- */
2758
2759 static struct attribute *hotkey_attributes[] __initdata = {
2760 &dev_attr_hotkey_enable.attr,
2761 &dev_attr_hotkey_bios_enabled.attr,
2762 &dev_attr_hotkey_report_mode.attr,
2763 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2764 &dev_attr_hotkey_mask.attr,
2765 &dev_attr_hotkey_all_mask.attr,
2766 &dev_attr_hotkey_recommended_mask.attr,
2767 &dev_attr_hotkey_source_mask.attr,
2768 &dev_attr_hotkey_poll_freq.attr,
2769 #endif
2770 };
2771
2772 static struct attribute *hotkey_mask_attributes[] __initdata = {
2773 &dev_attr_hotkey_bios_mask.attr,
2774 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2775 &dev_attr_hotkey_mask.attr,
2776 &dev_attr_hotkey_all_mask.attr,
2777 &dev_attr_hotkey_recommended_mask.attr,
2778 #endif
2779 &dev_attr_hotkey_wakeup_reason.attr,
2780 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2781 };
2782
2783 /*
2784 * Sync both the hw and sw blocking state of all switches
2785 */
2786 static void tpacpi_send_radiosw_update(void)
2787 {
2788 int wlsw;
2789
2790 /*
2791 * We must sync all rfkill controllers *before* issuing any
2792 * rfkill input events, or we will race the rfkill core input
2793 * handler.
2794 *
2795 * tpacpi_inputdev_send_mutex works as a syncronization point
2796 * for the above.
2797 *
2798 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2799 */
2800
2801 wlsw = hotkey_get_wlsw();
2802
2803 /* Sync hw blocking state first if it is hw-blocked */
2804 if (wlsw == TPACPI_RFK_RADIO_OFF)
2805 tpacpi_rfk_update_hwblock_state(true);
2806
2807 /* Sync sw blocking state */
2808 tpacpi_rfk_update_swstate_all();
2809
2810 /* Sync hw blocking state last if it is hw-unblocked */
2811 if (wlsw == TPACPI_RFK_RADIO_ON)
2812 tpacpi_rfk_update_hwblock_state(false);
2813
2814 /* Issue rfkill input event for WLSW switch */
2815 if (!(wlsw < 0)) {
2816 mutex_lock(&tpacpi_inputdev_send_mutex);
2817
2818 input_report_switch(tpacpi_inputdev,
2819 SW_RFKILL_ALL, (wlsw > 0));
2820 input_sync(tpacpi_inputdev);
2821
2822 mutex_unlock(&tpacpi_inputdev_send_mutex);
2823 }
2824
2825 /*
2826 * this can be unconditional, as we will poll state again
2827 * if userspace uses the notify to read data
2828 */
2829 hotkey_radio_sw_notify_change();
2830 }
2831
2832 static void hotkey_exit(void)
2833 {
2834 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2835 mutex_lock(&hotkey_mutex);
2836 hotkey_poll_stop_sync();
2837 mutex_unlock(&hotkey_mutex);
2838 #endif
2839
2840 if (hotkey_dev_attributes)
2841 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2842
2843 kfree(hotkey_keycode_map);
2844
2845 if (tp_features.hotkey) {
2846 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2847 "restoring original hot key mask\n");
2848 /* no short-circuit boolean operator below! */
2849 if ((hotkey_mask_set(hotkey_orig_mask) |
2850 hotkey_status_set(false)) != 0)
2851 printk(TPACPI_ERR
2852 "failed to restore hot key mask "
2853 "to BIOS defaults\n");
2854 }
2855 }
2856
2857 static void __init hotkey_unmap(const unsigned int scancode)
2858 {
2859 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
2860 clear_bit(hotkey_keycode_map[scancode],
2861 tpacpi_inputdev->keybit);
2862 hotkey_keycode_map[scancode] = KEY_RESERVED;
2863 }
2864 }
2865
2866 static int __init hotkey_init(struct ibm_init_struct *iibm)
2867 {
2868 /* Requirements for changing the default keymaps:
2869 *
2870 * 1. Many of the keys are mapped to KEY_RESERVED for very
2871 * good reasons. Do not change them unless you have deep
2872 * knowledge on the IBM and Lenovo ThinkPad firmware for
2873 * the various ThinkPad models. The driver behaves
2874 * differently for KEY_RESERVED: such keys have their
2875 * hot key mask *unset* in mask_recommended, and also
2876 * in the initial hot key mask programmed into the
2877 * firmware at driver load time, which means the firm-
2878 * ware may react very differently if you change them to
2879 * something else;
2880 *
2881 * 2. You must be subscribed to the linux-thinkpad and
2882 * ibm-acpi-devel mailing lists, and you should read the
2883 * list archives since 2007 if you want to change the
2884 * keymaps. This requirement exists so that you will
2885 * know the past history of problems with the thinkpad-
2886 * acpi driver keymaps, and also that you will be
2887 * listening to any bug reports;
2888 *
2889 * 3. Do not send thinkpad-acpi specific patches directly to
2890 * for merging, *ever*. Send them to the linux-acpi
2891 * mailinglist for comments. Merging is to be done only
2892 * through acpi-test and the ACPI maintainer.
2893 *
2894 * If the above is too much to ask, don't change the keymap.
2895 * Ask the thinkpad-acpi maintainer to do it, instead.
2896 */
2897 static u16 ibm_keycode_map[] __initdata = {
2898 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2899 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2900 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2901 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2902
2903 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2904 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2905 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2906 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2907
2908 /* brightness: firmware always reacts to them, unless
2909 * X.org did some tricks in the radeon BIOS scratch
2910 * registers of *some* models */
2911 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2912 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2913
2914 /* Thinklight: firmware always react to it */
2915 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2916
2917 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2918 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2919
2920 /* Volume: firmware always react to it and reprograms
2921 * the built-in *extra* mixer. Never map it to control
2922 * another mixer by default. */
2923 KEY_RESERVED, /* 0x14: VOLUME UP */
2924 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2925 KEY_RESERVED, /* 0x16: MUTE */
2926
2927 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2928
2929 /* (assignments unknown, please report if found) */
2930 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2931 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2932 };
2933 static u16 lenovo_keycode_map[] __initdata = {
2934 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2935 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2936 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2937 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2938
2939 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2940 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2941 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2942 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2943
2944 /* These should be enabled --only-- when ACPI video
2945 * is disabled (i.e. in "vendor" mode), and are handled
2946 * in a special way by the init code */
2947 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
2948 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
2949
2950 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2951
2952 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2953 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2954
2955 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2956 * react to it and reprograms the built-in *extra* mixer.
2957 * Never map it to control another mixer by default.
2958 *
2959 * T60?, T61, R60?, R61: firmware and EC tries to send
2960 * these over the regular keyboard, so these are no-ops,
2961 * but there are still weird bugs re. MUTE, so do not
2962 * change unless you get test reports from all Lenovo
2963 * models. May cause the BIOS to interfere with the
2964 * HDA mixer.
2965 */
2966 KEY_RESERVED, /* 0x14: VOLUME UP */
2967 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2968 KEY_RESERVED, /* 0x16: MUTE */
2969
2970 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2971
2972 /* (assignments unknown, please report if found) */
2973 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2974 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2975 };
2976
2977 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2978 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2979 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2980
2981 int res, i;
2982 int status;
2983 int hkeyv;
2984
2985 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2986 "initializing hotkey subdriver\n");
2987
2988 BUG_ON(!tpacpi_inputdev);
2989 BUG_ON(tpacpi_inputdev->open != NULL ||
2990 tpacpi_inputdev->close != NULL);
2991
2992 TPACPI_ACPIHANDLE_INIT(hkey);
2993 mutex_init(&hotkey_mutex);
2994
2995 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2996 mutex_init(&hotkey_thread_mutex);
2997 mutex_init(&hotkey_thread_data_mutex);
2998 #endif
2999
3000 /* hotkey not supported on 570 */
3001 tp_features.hotkey = hkey_handle != NULL;
3002
3003 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3004 "hotkeys are %s\n",
3005 str_supported(tp_features.hotkey));
3006
3007 if (!tp_features.hotkey)
3008 return 1;
3009
3010 tpacpi_disable_brightness_delay();
3011
3012 hotkey_dev_attributes = create_attr_set(13, NULL);
3013 if (!hotkey_dev_attributes)
3014 return -ENOMEM;
3015 res = add_many_to_attr_set(hotkey_dev_attributes,
3016 hotkey_attributes,
3017 ARRAY_SIZE(hotkey_attributes));
3018 if (res)
3019 goto err_exit;
3020
3021 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3022 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3023 for HKEY interface version 0x100 */
3024 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3025 if ((hkeyv >> 8) != 1) {
3026 printk(TPACPI_ERR "unknown version of the "
3027 "HKEY interface: 0x%x\n", hkeyv);
3028 printk(TPACPI_ERR "please report this to %s\n",
3029 TPACPI_MAIL);
3030 } else {
3031 /*
3032 * MHKV 0x100 in A31, R40, R40e,
3033 * T4x, X31, and later
3034 */
3035 tp_features.hotkey_mask = 1;
3036 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3037 "firmware HKEY interface version: 0x%x\n",
3038 hkeyv);
3039 }
3040 }
3041
3042 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3043 "hotkey masks are %s\n",
3044 str_supported(tp_features.hotkey_mask));
3045
3046 if (tp_features.hotkey_mask) {
3047 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3048 "MHKA", "qd")) {
3049 printk(TPACPI_ERR
3050 "missing MHKA handler, "
3051 "please report this to %s\n",
3052 TPACPI_MAIL);
3053 /* FN+F12, FN+F4, FN+F3 */
3054 hotkey_all_mask = 0x080cU;
3055 }
3056 }
3057
3058 /* hotkey_source_mask *must* be zero for
3059 * the first hotkey_mask_get */
3060 if (tp_features.hotkey_mask) {
3061 res = hotkey_mask_get();
3062 if (res)
3063 goto err_exit;
3064
3065 hotkey_orig_mask = hotkey_mask;
3066 res = add_many_to_attr_set(
3067 hotkey_dev_attributes,
3068 hotkey_mask_attributes,
3069 ARRAY_SIZE(hotkey_mask_attributes));
3070 if (res)
3071 goto err_exit;
3072 }
3073
3074 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3075 if (dbg_wlswemul) {
3076 tp_features.hotkey_wlsw = 1;
3077 printk(TPACPI_INFO
3078 "radio switch emulation enabled\n");
3079 } else
3080 #endif
3081 /* Not all thinkpads have a hardware radio switch */
3082 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3083 tp_features.hotkey_wlsw = 1;
3084 printk(TPACPI_INFO
3085 "radio switch found; radios are %s\n",
3086 enabled(status, 0));
3087 }
3088 if (tp_features.hotkey_wlsw)
3089 res = add_to_attr_set(hotkey_dev_attributes,
3090 &dev_attr_hotkey_radio_sw.attr);
3091
3092 /* For X41t, X60t, X61t Tablets... */
3093 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3094 tp_features.hotkey_tablet = 1;
3095 printk(TPACPI_INFO
3096 "possible tablet mode switch found; "
3097 "ThinkPad in %s mode\n",
3098 (status & TP_HOTKEY_TABLET_MASK)?
3099 "tablet" : "laptop");
3100 res = add_to_attr_set(hotkey_dev_attributes,
3101 &dev_attr_hotkey_tablet_mode.attr);
3102 }
3103
3104 if (!res)
3105 res = register_attr_set_with_sysfs(
3106 hotkey_dev_attributes,
3107 &tpacpi_pdev->dev.kobj);
3108 if (res)
3109 goto err_exit;
3110
3111 /* Set up key map */
3112
3113 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3114 GFP_KERNEL);
3115 if (!hotkey_keycode_map) {
3116 printk(TPACPI_ERR
3117 "failed to allocate memory for key map\n");
3118 res = -ENOMEM;
3119 goto err_exit;
3120 }
3121
3122 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3123 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3124 "using Lenovo default hot key map\n");
3125 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3126 TPACPI_HOTKEY_MAP_SIZE);
3127 } else {
3128 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3129 "using IBM default hot key map\n");
3130 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3131 TPACPI_HOTKEY_MAP_SIZE);
3132 }
3133
3134 set_bit(EV_KEY, tpacpi_inputdev->evbit);
3135 set_bit(EV_MSC, tpacpi_inputdev->evbit);
3136 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3137 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3138 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3139 tpacpi_inputdev->keycode = hotkey_keycode_map;
3140 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3141 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3142 set_bit(hotkey_keycode_map[i],
3143 tpacpi_inputdev->keybit);
3144 } else {
3145 if (i < sizeof(hotkey_reserved_mask)*8)
3146 hotkey_reserved_mask |= 1 << i;
3147 }
3148 }
3149
3150 if (tp_features.hotkey_wlsw) {
3151 set_bit(EV_SW, tpacpi_inputdev->evbit);
3152 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3153 }
3154 if (tp_features.hotkey_tablet) {
3155 set_bit(EV_SW, tpacpi_inputdev->evbit);
3156 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3157 }
3158
3159 /* Do not issue duplicate brightness change events to
3160 * userspace */
3161 if (!tp_features.bright_acpimode)
3162 /* update bright_acpimode... */
3163 tpacpi_check_std_acpi_brightness_support();
3164
3165 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3166 printk(TPACPI_INFO
3167 "This ThinkPad has standard ACPI backlight "
3168 "brightness control, supported by the ACPI "
3169 "video driver\n");
3170 printk(TPACPI_NOTICE
3171 "Disabling thinkpad-acpi brightness events "
3172 "by default...\n");
3173
3174 /* Disable brightness up/down on Lenovo thinkpads when
3175 * ACPI is handling them, otherwise it is plain impossible
3176 * for userspace to do something even remotely sane */
3177 hotkey_reserved_mask |=
3178 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3179 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3180 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3181 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3182 }
3183
3184 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3185 if (tp_features.hotkey_mask) {
3186 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3187 & ~hotkey_all_mask
3188 & ~hotkey_reserved_mask;
3189 } else {
3190 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3191 & ~hotkey_reserved_mask;
3192 }
3193
3194 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3195 "hotkey source mask 0x%08x, polling freq %u\n",
3196 hotkey_source_mask, hotkey_poll_freq);
3197 #endif
3198
3199 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3200 "enabling firmware HKEY event interface...\n");
3201 res = hotkey_status_set(true);
3202 if (res) {
3203 hotkey_exit();
3204 return res;
3205 }
3206 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
3207 & ~hotkey_reserved_mask)
3208 | hotkey_orig_mask);
3209 if (res < 0 && res != -ENXIO) {
3210 hotkey_exit();
3211 return res;
3212 }
3213
3214 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3215 "legacy ibm/hotkey event reporting over procfs %s\n",
3216 (hotkey_report_mode < 2) ?
3217 "enabled" : "disabled");
3218
3219 tpacpi_inputdev->open = &hotkey_inputdev_open;
3220 tpacpi_inputdev->close = &hotkey_inputdev_close;
3221
3222 hotkey_poll_setup_safe(true);
3223 tpacpi_send_radiosw_update();
3224 tpacpi_input_send_tabletsw();
3225
3226 return 0;
3227
3228 err_exit:
3229 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3230 hotkey_dev_attributes = NULL;
3231
3232 return (res < 0)? res : 1;
3233 }
3234
3235 static bool hotkey_notify_hotkey(const u32 hkey,
3236 bool *send_acpi_ev,
3237 bool *ignore_acpi_ev)
3238 {
3239 /* 0x1000-0x1FFF: key presses */
3240 unsigned int scancode = hkey & 0xfff;
3241 *send_acpi_ev = true;
3242 *ignore_acpi_ev = false;
3243
3244 if (scancode > 0 && scancode < 0x21) {
3245 scancode--;
3246 if (!(hotkey_source_mask & (1 << scancode))) {
3247 tpacpi_input_send_key(scancode);
3248 *send_acpi_ev = false;
3249 } else {
3250 *ignore_acpi_ev = true;
3251 }
3252 return true;
3253 }
3254 return false;
3255 }
3256
3257 static bool hotkey_notify_wakeup(const u32 hkey,
3258 bool *send_acpi_ev,
3259 bool *ignore_acpi_ev)
3260 {
3261 /* 0x2000-0x2FFF: Wakeup reason */
3262 *send_acpi_ev = true;
3263 *ignore_acpi_ev = false;
3264
3265 switch (hkey) {
3266 case 0x2304: /* suspend, undock */
3267 case 0x2404: /* hibernation, undock */
3268 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3269 *ignore_acpi_ev = true;
3270 break;
3271
3272 case 0x2305: /* suspend, bay eject */
3273 case 0x2405: /* hibernation, bay eject */
3274 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3275 *ignore_acpi_ev = true;
3276 break;
3277
3278 case 0x2313: /* Battery on critical low level (S3) */
3279 case 0x2413: /* Battery on critical low level (S4) */
3280 printk(TPACPI_ALERT
3281 "EMERGENCY WAKEUP: battery almost empty\n");
3282 /* how to auto-heal: */
3283 /* 2313: woke up from S3, go to S4/S5 */
3284 /* 2413: woke up from S4, go to S5 */
3285 break;
3286
3287 default:
3288 return false;
3289 }
3290
3291 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3292 printk(TPACPI_INFO
3293 "woke up due to a hot-unplug "
3294 "request...\n");
3295 hotkey_wakeup_reason_notify_change();
3296 }
3297 return true;
3298 }
3299
3300 static bool hotkey_notify_usrevent(const u32 hkey,
3301 bool *send_acpi_ev,
3302 bool *ignore_acpi_ev)
3303 {
3304 /* 0x5000-0x5FFF: human interface helpers */
3305 *send_acpi_ev = true;
3306 *ignore_acpi_ev = false;
3307
3308 switch (hkey) {
3309 case 0x5010: /* Lenovo new BIOS: brightness changed */
3310 case 0x500b: /* X61t: tablet pen inserted into bay */
3311 case 0x500c: /* X61t: tablet pen removed from bay */
3312 return true;
3313
3314 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3315 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3316 tpacpi_input_send_tabletsw();
3317 hotkey_tablet_mode_notify_change();
3318 *send_acpi_ev = false;
3319 return true;
3320
3321 case 0x5001:
3322 case 0x5002:
3323 /* LID switch events. Do not propagate */
3324 *ignore_acpi_ev = true;
3325 return true;
3326
3327 default:
3328 return false;
3329 }
3330 }
3331
3332 static bool hotkey_notify_thermal(const u32 hkey,
3333 bool *send_acpi_ev,
3334 bool *ignore_acpi_ev)
3335 {
3336 /* 0x6000-0x6FFF: thermal alarms */
3337 *send_acpi_ev = true;
3338 *ignore_acpi_ev = false;
3339
3340 switch (hkey) {
3341 case 0x6011:
3342 printk(TPACPI_CRIT
3343 "THERMAL ALARM: battery is too hot!\n");
3344 /* recommended action: warn user through gui */
3345 return true;
3346 case 0x6012:
3347 printk(TPACPI_ALERT
3348 "THERMAL EMERGENCY: battery is extremely hot!\n");
3349 /* recommended action: immediate sleep/hibernate */
3350 return true;
3351 case 0x6021:
3352 printk(TPACPI_CRIT
3353 "THERMAL ALARM: "
3354 "a sensor reports something is too hot!\n");
3355 /* recommended action: warn user through gui, that */
3356 /* some internal component is too hot */
3357 return true;
3358 case 0x6022:
3359 printk(TPACPI_ALERT
3360 "THERMAL EMERGENCY: "
3361 "a sensor reports something is extremely hot!\n");
3362 /* recommended action: immediate sleep/hibernate */
3363 return true;
3364 case 0x6030:
3365 printk(TPACPI_INFO
3366 "EC reports that Thermal Table has changed\n");
3367 /* recommended action: do nothing, we don't have
3368 * Lenovo ATM information */
3369 return true;
3370 default:
3371 printk(TPACPI_ALERT
3372 "THERMAL ALERT: unknown thermal alarm received\n");
3373 return false;
3374 }
3375 }
3376
3377 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3378 {
3379 u32 hkey;
3380 bool send_acpi_ev;
3381 bool ignore_acpi_ev;
3382 bool known_ev;
3383
3384 if (event != 0x80) {
3385 printk(TPACPI_ERR
3386 "unknown HKEY notification event %d\n", event);
3387 /* forward it to userspace, maybe it knows how to handle it */
3388 acpi_bus_generate_netlink_event(
3389 ibm->acpi->device->pnp.device_class,
3390 dev_name(&ibm->acpi->device->dev),
3391 event, 0);
3392 return;
3393 }
3394
3395 while (1) {
3396 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3397 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3398 return;
3399 }
3400
3401 if (hkey == 0) {
3402 /* queue empty */
3403 return;
3404 }
3405
3406 send_acpi_ev = true;
3407 ignore_acpi_ev = false;
3408
3409 switch (hkey >> 12) {
3410 case 1:
3411 /* 0x1000-0x1FFF: key presses */
3412 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3413 &ignore_acpi_ev);
3414 break;
3415 case 2:
3416 /* 0x2000-0x2FFF: Wakeup reason */
3417 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3418 &ignore_acpi_ev);
3419 break;
3420 case 3:
3421 /* 0x3000-0x3FFF: bay-related wakeups */
3422 if (hkey == 0x3003) {
3423 hotkey_autosleep_ack = 1;
3424 printk(TPACPI_INFO
3425 "bay ejected\n");
3426 hotkey_wakeup_hotunplug_complete_notify_change();
3427 known_ev = true;
3428 } else {
3429 known_ev = false;
3430 }
3431 break;
3432 case 4:
3433 /* 0x4000-0x4FFF: dock-related wakeups */
3434 if (hkey == 0x4003) {
3435 hotkey_autosleep_ack = 1;
3436 printk(TPACPI_INFO
3437 "undocked\n");
3438 hotkey_wakeup_hotunplug_complete_notify_change();
3439 known_ev = true;
3440 } else {
3441 known_ev = false;
3442 }
3443 break;
3444 case 5:
3445 /* 0x5000-0x5FFF: human interface helpers */
3446 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3447 &ignore_acpi_ev);
3448 break;
3449 case 6:
3450 /* 0x6000-0x6FFF: thermal alarms */
3451 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3452 &ignore_acpi_ev);
3453 break;
3454 case 7:
3455 /* 0x7000-0x7FFF: misc */
3456 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3457 tpacpi_send_radiosw_update();
3458 send_acpi_ev = 0;
3459 known_ev = true;
3460 break;
3461 }
3462 /* fallthrough to default */
3463 default:
3464 known_ev = false;
3465 }
3466 if (!known_ev) {
3467 printk(TPACPI_NOTICE
3468 "unhandled HKEY event 0x%04x\n", hkey);
3469 printk(TPACPI_NOTICE
3470 "please report the conditions when this "
3471 "event happened to %s\n", TPACPI_MAIL);
3472 }
3473
3474 /* Legacy events */
3475 if (!ignore_acpi_ev &&
3476 (send_acpi_ev || hotkey_report_mode < 2)) {
3477 acpi_bus_generate_proc_event(ibm->acpi->device,
3478 event, hkey);
3479 }
3480
3481 /* netlink events */
3482 if (!ignore_acpi_ev && send_acpi_ev) {
3483 acpi_bus_generate_netlink_event(
3484 ibm->acpi->device->pnp.device_class,
3485 dev_name(&ibm->acpi->device->dev),
3486 event, hkey);
3487 }
3488 }
3489 }
3490
3491 static void hotkey_suspend(pm_message_t state)
3492 {
3493 /* Do these on suspend, we get the events on early resume! */
3494 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3495 hotkey_autosleep_ack = 0;
3496 }
3497
3498 static void hotkey_resume(void)
3499 {
3500 tpacpi_disable_brightness_delay();
3501
3502 if (hotkey_mask_get())
3503 printk(TPACPI_ERR
3504 "error while trying to read hot key mask "
3505 "from firmware\n");
3506 tpacpi_send_radiosw_update();
3507 hotkey_tablet_mode_notify_change();
3508 hotkey_wakeup_reason_notify_change();
3509 hotkey_wakeup_hotunplug_complete_notify_change();
3510 hotkey_poll_setup_safe(false);
3511 }
3512
3513 /* procfs -------------------------------------------------------------- */
3514 static int hotkey_read(char *p)
3515 {
3516 int res, status;
3517 int len = 0;
3518
3519 if (!tp_features.hotkey) {
3520 len += sprintf(p + len, "status:\t\tnot supported\n");
3521 return len;
3522 }
3523
3524 if (mutex_lock_killable(&hotkey_mutex))
3525 return -ERESTARTSYS;
3526 res = hotkey_status_get(&status);
3527 if (!res)
3528 res = hotkey_mask_get();
3529 mutex_unlock(&hotkey_mutex);
3530 if (res)
3531 return res;
3532
3533 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3534 if (tp_features.hotkey_mask) {
3535 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3536 len += sprintf(p + len,
3537 "commands:\tenable, disable, reset, <mask>\n");
3538 } else {
3539 len += sprintf(p + len, "mask:\t\tnot supported\n");
3540 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3541 }
3542
3543 return len;
3544 }
3545
3546 static void hotkey_enabledisable_warn(bool enable)
3547 {
3548 tpacpi_log_usertask("procfs hotkey enable/disable");
3549 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3550 TPACPI_WARN
3551 "hotkey enable/disable functionality has been "
3552 "removed from the driver. Hotkeys are always "
3553 "enabled\n"))
3554 printk(TPACPI_ERR
3555 "Please remove the hotkey=enable module "
3556 "parameter, it is deprecated. Hotkeys are always "
3557 "enabled\n");
3558 }
3559
3560 static int hotkey_write(char *buf)
3561 {
3562 int res;
3563 u32 mask;
3564 char *cmd;
3565
3566 if (!tp_features.hotkey)
3567 return -ENODEV;
3568
3569 if (mutex_lock_killable(&hotkey_mutex))
3570 return -ERESTARTSYS;
3571
3572 mask = hotkey_mask;
3573
3574 res = 0;
3575 while ((cmd = next_cmd(&buf))) {
3576 if (strlencmp(cmd, "enable") == 0) {
3577 hotkey_enabledisable_warn(1);
3578 } else if (strlencmp(cmd, "disable") == 0) {
3579 hotkey_enabledisable_warn(0);
3580 res = -EPERM;
3581 } else if (strlencmp(cmd, "reset") == 0) {
3582 mask = (hotkey_all_mask | hotkey_source_mask)
3583 & ~hotkey_reserved_mask;
3584 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3585 /* mask set */
3586 } else if (sscanf(cmd, "%x", &mask) == 1) {
3587 /* mask set */
3588 } else {
3589 res = -EINVAL;
3590 goto errexit;
3591 }
3592 }
3593
3594 if (!res)
3595 tpacpi_disclose_usertask("procfs hotkey",
3596 "set mask to 0x%08x\n", mask);
3597
3598 if (!res && mask != hotkey_mask)
3599 res = hotkey_mask_set(mask);
3600
3601 errexit:
3602 mutex_unlock(&hotkey_mutex);
3603 return res;
3604 }
3605
3606 static const struct acpi_device_id ibm_htk_device_ids[] = {
3607 {TPACPI_ACPI_HKEY_HID, 0},
3608 {"", 0},
3609 };
3610
3611 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3612 .hid = ibm_htk_device_ids,
3613 .notify = hotkey_notify,
3614 .handle = &hkey_handle,
3615 .type = ACPI_DEVICE_NOTIFY,
3616 };
3617
3618 static struct ibm_struct hotkey_driver_data = {
3619 .name = "hotkey",
3620 .read = hotkey_read,
3621 .write = hotkey_write,
3622 .exit = hotkey_exit,
3623 .resume = hotkey_resume,
3624 .suspend = hotkey_suspend,
3625 .acpi = &ibm_hotkey_acpidriver,
3626 };
3627
3628 /*************************************************************************
3629 * Bluetooth subdriver
3630 */
3631
3632 enum {
3633 /* ACPI GBDC/SBDC bits */
3634 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3635 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3636 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3637 off / last state */
3638 };
3639
3640 enum {
3641 /* ACPI \BLTH commands */
3642 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3643 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3644 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3645 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3646 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3647 };
3648
3649 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3650
3651 static void bluetooth_suspend(pm_message_t state)
3652 {
3653 /* Try to make sure radio will resume powered off */
3654 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3655 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3656 vdbg_printk(TPACPI_DBG_RFKILL,
3657 "bluetooth power down on resume request failed\n");
3658 }
3659
3660 static int bluetooth_get_status(void)
3661 {
3662 int status;
3663
3664 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3665 if (dbg_bluetoothemul)
3666 return (tpacpi_bluetooth_emulstate) ?
3667 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3668 #endif
3669
3670 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3671 return -EIO;
3672
3673 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3674 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3675 }
3676
3677 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3678 {
3679 int status;
3680
3681 vdbg_printk(TPACPI_DBG_RFKILL,
3682 "will attempt to %s bluetooth\n",
3683 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3684
3685 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3686 if (dbg_bluetoothemul) {
3687 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3688 return 0;
3689 }
3690 #endif
3691
3692 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3693 if (state == TPACPI_RFK_RADIO_ON)
3694 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3695 else
3696 status = 0;
3697
3698 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3699 return -EIO;
3700
3701 return 0;
3702 }
3703
3704 /* sysfs bluetooth enable ---------------------------------------------- */
3705 static ssize_t bluetooth_enable_show(struct device *dev,
3706 struct device_attribute *attr,
3707 char *buf)
3708 {
3709 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3710 attr, buf);
3711 }
3712
3713 static ssize_t bluetooth_enable_store(struct device *dev,
3714 struct device_attribute *attr,
3715 const char *buf, size_t count)
3716 {
3717 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3718 attr, buf, count);
3719 }
3720
3721 static struct device_attribute dev_attr_bluetooth_enable =
3722 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3723 bluetooth_enable_show, bluetooth_enable_store);
3724
3725 /* --------------------------------------------------------------------- */
3726
3727 static struct attribute *bluetooth_attributes[] = {
3728 &dev_attr_bluetooth_enable.attr,
3729 NULL
3730 };
3731
3732 static const struct attribute_group bluetooth_attr_group = {
3733 .attrs = bluetooth_attributes,
3734 };
3735
3736 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3737 .get_status = bluetooth_get_status,
3738 .set_status = bluetooth_set_status,
3739 };
3740
3741 static void bluetooth_shutdown(void)
3742 {
3743 /* Order firmware to save current state to NVRAM */
3744 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3745 TP_ACPI_BLTH_SAVE_STATE))
3746 printk(TPACPI_NOTICE
3747 "failed to save bluetooth state to NVRAM\n");
3748 else
3749 vdbg_printk(TPACPI_DBG_RFKILL,
3750 "bluestooth state saved to NVRAM\n");
3751 }
3752
3753 static void bluetooth_exit(void)
3754 {
3755 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3756 &bluetooth_attr_group);
3757
3758 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3759
3760 bluetooth_shutdown();
3761 }
3762
3763 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3764 {
3765 int res;
3766 int status = 0;
3767
3768 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3769 "initializing bluetooth subdriver\n");
3770
3771 TPACPI_ACPIHANDLE_INIT(hkey);
3772
3773 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3774 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3775 tp_features.bluetooth = hkey_handle &&
3776 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3777
3778 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3779 "bluetooth is %s, status 0x%02x\n",
3780 str_supported(tp_features.bluetooth),
3781 status);
3782
3783 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3784 if (dbg_bluetoothemul) {
3785 tp_features.bluetooth = 1;
3786 printk(TPACPI_INFO
3787 "bluetooth switch emulation enabled\n");
3788 } else
3789 #endif
3790 if (tp_features.bluetooth &&
3791 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3792 /* no bluetooth hardware present in system */
3793 tp_features.bluetooth = 0;
3794 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3795 "bluetooth hardware not installed\n");
3796 }
3797
3798 if (!tp_features.bluetooth)
3799 return 1;
3800
3801 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3802 &bluetooth_tprfk_ops,
3803 RFKILL_TYPE_BLUETOOTH,
3804 TPACPI_RFK_BLUETOOTH_SW_NAME,
3805 true);
3806 if (res)
3807 return res;
3808
3809 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3810 &bluetooth_attr_group);
3811 if (res) {
3812 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3813 return res;
3814 }
3815
3816 return 0;
3817 }
3818
3819 /* procfs -------------------------------------------------------------- */
3820 static int bluetooth_read(char *p)
3821 {
3822 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3823 }
3824
3825 static int bluetooth_write(char *buf)
3826 {
3827 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3828 }
3829
3830 static struct ibm_struct bluetooth_driver_data = {
3831 .name = "bluetooth",
3832 .read = bluetooth_read,
3833 .write = bluetooth_write,
3834 .exit = bluetooth_exit,
3835 .suspend = bluetooth_suspend,
3836 .shutdown = bluetooth_shutdown,
3837 };
3838
3839 /*************************************************************************
3840 * Wan subdriver
3841 */
3842
3843 enum {
3844 /* ACPI GWAN/SWAN bits */
3845 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3846 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3847 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3848 off / last state */
3849 };
3850
3851 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3852
3853 static void wan_suspend(pm_message_t state)
3854 {
3855 /* Try to make sure radio will resume powered off */
3856 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3857 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3858 vdbg_printk(TPACPI_DBG_RFKILL,
3859 "WWAN power down on resume request failed\n");
3860 }
3861
3862 static int wan_get_status(void)
3863 {
3864 int status;
3865
3866 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3867 if (dbg_wwanemul)
3868 return (tpacpi_wwan_emulstate) ?
3869 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3870 #endif
3871
3872 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3873 return -EIO;
3874
3875 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3876 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3877 }
3878
3879 static int wan_set_status(enum tpacpi_rfkill_state state)
3880 {
3881 int status;
3882
3883 vdbg_printk(TPACPI_DBG_RFKILL,
3884 "will attempt to %s wwan\n",
3885 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3886
3887 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3888 if (dbg_wwanemul) {
3889 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3890 return 0;
3891 }
3892 #endif
3893
3894 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3895 if (state == TPACPI_RFK_RADIO_ON)
3896 status = TP_ACPI_WANCARD_RADIOSSW;
3897 else
3898 status = 0;
3899
3900 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3901 return -EIO;
3902
3903 return 0;
3904 }
3905
3906 /* sysfs wan enable ---------------------------------------------------- */
3907 static ssize_t wan_enable_show(struct device *dev,
3908 struct device_attribute *attr,
3909 char *buf)
3910 {
3911 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3912 attr, buf);
3913 }
3914
3915 static ssize_t wan_enable_store(struct device *dev,
3916 struct device_attribute *attr,
3917 const char *buf, size_t count)
3918 {
3919 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3920 attr, buf, count);
3921 }
3922
3923 static struct device_attribute dev_attr_wan_enable =
3924 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3925 wan_enable_show, wan_enable_store);
3926
3927 /* --------------------------------------------------------------------- */
3928
3929 static struct attribute *wan_attributes[] = {
3930 &dev_attr_wan_enable.attr,
3931 NULL
3932 };
3933
3934 static const struct attribute_group wan_attr_group = {
3935 .attrs = wan_attributes,
3936 };
3937
3938 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3939 .get_status = wan_get_status,
3940 .set_status = wan_set_status,
3941 };
3942
3943 static void wan_shutdown(void)
3944 {
3945 /* Order firmware to save current state to NVRAM */
3946 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3947 TP_ACPI_WGSV_SAVE_STATE))
3948 printk(TPACPI_NOTICE
3949 "failed to save WWAN state to NVRAM\n");
3950 else
3951 vdbg_printk(TPACPI_DBG_RFKILL,
3952 "WWAN state saved to NVRAM\n");
3953 }
3954
3955 static void wan_exit(void)
3956 {
3957 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3958 &wan_attr_group);
3959
3960 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3961
3962 wan_shutdown();
3963 }
3964
3965 static int __init wan_init(struct ibm_init_struct *iibm)
3966 {
3967 int res;
3968 int status = 0;
3969
3970 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3971 "initializing wan subdriver\n");
3972
3973 TPACPI_ACPIHANDLE_INIT(hkey);
3974
3975 tp_features.wan = hkey_handle &&
3976 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3977
3978 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3979 "wan is %s, status 0x%02x\n",
3980 str_supported(tp_features.wan),
3981 status);
3982
3983 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3984 if (dbg_wwanemul) {
3985 tp_features.wan = 1;
3986 printk(TPACPI_INFO
3987 "wwan switch emulation enabled\n");
3988 } else
3989 #endif
3990 if (tp_features.wan &&
3991 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3992 /* no wan hardware present in system */
3993 tp_features.wan = 0;
3994 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3995 "wan hardware not installed\n");
3996 }
3997
3998 if (!tp_features.wan)
3999 return 1;
4000
4001 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4002 &wan_tprfk_ops,
4003 RFKILL_TYPE_WWAN,
4004 TPACPI_RFK_WWAN_SW_NAME,
4005 true);
4006 if (res)
4007 return res;
4008
4009 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4010 &wan_attr_group);
4011
4012 if (res) {
4013 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4014 return res;
4015 }
4016
4017 return 0;
4018 }
4019
4020 /* procfs -------------------------------------------------------------- */
4021 static int wan_read(char *p)
4022 {
4023 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4024 }
4025
4026 static int wan_write(char *buf)
4027 {
4028 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4029 }
4030
4031 static struct ibm_struct wan_driver_data = {
4032 .name = "wan",
4033 .read = wan_read,
4034 .write = wan_write,
4035 .exit = wan_exit,
4036 .suspend = wan_suspend,
4037 .shutdown = wan_shutdown,
4038 };
4039
4040 /*************************************************************************
4041 * UWB subdriver
4042 */
4043
4044 enum {
4045 /* ACPI GUWB/SUWB bits */
4046 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4047 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4048 };
4049
4050 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4051
4052 static int uwb_get_status(void)
4053 {
4054 int status;
4055
4056 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4057 if (dbg_uwbemul)
4058 return (tpacpi_uwb_emulstate) ?
4059 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4060 #endif
4061
4062 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4063 return -EIO;
4064
4065 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4066 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4067 }
4068
4069 static int uwb_set_status(enum tpacpi_rfkill_state state)
4070 {
4071 int status;
4072
4073 vdbg_printk(TPACPI_DBG_RFKILL,
4074 "will attempt to %s UWB\n",
4075 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4076
4077 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4078 if (dbg_uwbemul) {
4079 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4080 return 0;
4081 }
4082 #endif
4083
4084 if (state == TPACPI_RFK_RADIO_ON)
4085 status = TP_ACPI_UWB_RADIOSSW;
4086 else
4087 status = 0;
4088
4089 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4090 return -EIO;
4091
4092 return 0;
4093 }
4094
4095 /* --------------------------------------------------------------------- */
4096
4097 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4098 .get_status = uwb_get_status,
4099 .set_status = uwb_set_status,
4100 };
4101
4102 static void uwb_exit(void)
4103 {
4104 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4105 }
4106
4107 static int __init uwb_init(struct ibm_init_struct *iibm)
4108 {
4109 int res;
4110 int status = 0;
4111
4112 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4113 "initializing uwb subdriver\n");
4114
4115 TPACPI_ACPIHANDLE_INIT(hkey);
4116
4117 tp_features.uwb = hkey_handle &&
4118 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4119
4120 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4121 "uwb is %s, status 0x%02x\n",
4122 str_supported(tp_features.uwb),
4123 status);
4124
4125 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4126 if (dbg_uwbemul) {
4127 tp_features.uwb = 1;
4128 printk(TPACPI_INFO
4129 "uwb switch emulation enabled\n");
4130 } else
4131 #endif
4132 if (tp_features.uwb &&
4133 !(status & TP_ACPI_UWB_HWPRESENT)) {
4134 /* no uwb hardware present in system */
4135 tp_features.uwb = 0;
4136 dbg_printk(TPACPI_DBG_INIT,
4137 "uwb hardware not installed\n");
4138 }
4139
4140 if (!tp_features.uwb)
4141 return 1;
4142
4143 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4144 &uwb_tprfk_ops,
4145 RFKILL_TYPE_UWB,
4146 TPACPI_RFK_UWB_SW_NAME,
4147 false);
4148 return res;
4149 }
4150
4151 static struct ibm_struct uwb_driver_data = {
4152 .name = "uwb",
4153 .exit = uwb_exit,
4154 .flags.experimental = 1,
4155 };
4156
4157 /*************************************************************************
4158 * Video subdriver
4159 */
4160
4161 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4162
4163 enum video_access_mode {
4164 TPACPI_VIDEO_NONE = 0,
4165 TPACPI_VIDEO_570, /* 570 */
4166 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4167 TPACPI_VIDEO_NEW, /* all others */
4168 };
4169
4170 enum { /* video status flags, based on VIDEO_570 */
4171 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4172 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4173 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4174 };
4175
4176 enum { /* TPACPI_VIDEO_570 constants */
4177 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4178 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4179 * video_status_flags */
4180 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4181 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4182 };
4183
4184 static enum video_access_mode video_supported;
4185 static int video_orig_autosw;
4186
4187 static int video_autosw_get(void);
4188 static int video_autosw_set(int enable);
4189
4190 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4191
4192 static int __init video_init(struct ibm_init_struct *iibm)
4193 {
4194 int ivga;
4195
4196 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4197
4198 TPACPI_ACPIHANDLE_INIT(vid);
4199 TPACPI_ACPIHANDLE_INIT(vid2);
4200
4201 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4202 /* G41, assume IVGA doesn't change */
4203 vid_handle = vid2_handle;
4204
4205 if (!vid_handle)
4206 /* video switching not supported on R30, R31 */
4207 video_supported = TPACPI_VIDEO_NONE;
4208 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4209 /* 570 */
4210 video_supported = TPACPI_VIDEO_570;
4211 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4212 /* 600e/x, 770e, 770x */
4213 video_supported = TPACPI_VIDEO_770;
4214 else
4215 /* all others */
4216 video_supported = TPACPI_VIDEO_NEW;
4217
4218 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4219 str_supported(video_supported != TPACPI_VIDEO_NONE),
4220 video_supported);
4221
4222 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4223 }
4224
4225 static void video_exit(void)
4226 {
4227 dbg_printk(TPACPI_DBG_EXIT,
4228 "restoring original video autoswitch mode\n");
4229 if (video_autosw_set(video_orig_autosw))
4230 printk(TPACPI_ERR "error while trying to restore original "
4231 "video autoswitch mode\n");
4232 }
4233
4234 static int video_outputsw_get(void)
4235 {
4236 int status = 0;
4237 int i;
4238
4239 switch (video_supported) {
4240 case TPACPI_VIDEO_570:
4241 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4242 TP_ACPI_VIDEO_570_PHSCMD))
4243 return -EIO;
4244 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4245 break;
4246 case TPACPI_VIDEO_770:
4247 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4248 return -EIO;
4249 if (i)
4250 status |= TP_ACPI_VIDEO_S_LCD;
4251 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4252 return -EIO;
4253 if (i)
4254 status |= TP_ACPI_VIDEO_S_CRT;
4255 break;
4256 case TPACPI_VIDEO_NEW:
4257 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4258 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4259 return -EIO;
4260 if (i)
4261 status |= TP_ACPI_VIDEO_S_CRT;
4262
4263 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4264 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4265 return -EIO;
4266 if (i)
4267 status |= TP_ACPI_VIDEO_S_LCD;
4268 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4269 return -EIO;
4270 if (i)
4271 status |= TP_ACPI_VIDEO_S_DVI;
4272 break;
4273 default:
4274 return -ENOSYS;
4275 }
4276
4277 return status;
4278 }
4279
4280 static int video_outputsw_set(int status)
4281 {
4282 int autosw;
4283 int res = 0;
4284
4285 switch (video_supported) {
4286 case TPACPI_VIDEO_570:
4287 res = acpi_evalf(NULL, NULL,
4288 "\\_SB.PHS2", "vdd",
4289 TP_ACPI_VIDEO_570_PHS2CMD,
4290 status | TP_ACPI_VIDEO_570_PHS2SET);
4291 break;
4292 case TPACPI_VIDEO_770:
4293 autosw = video_autosw_get();
4294 if (autosw < 0)
4295 return autosw;
4296
4297 res = video_autosw_set(1);
4298 if (res)
4299 return res;
4300 res = acpi_evalf(vid_handle, NULL,
4301 "ASWT", "vdd", status * 0x100, 0);
4302 if (!autosw && video_autosw_set(autosw)) {
4303 printk(TPACPI_ERR
4304 "video auto-switch left enabled due to error\n");
4305 return -EIO;
4306 }
4307 break;
4308 case TPACPI_VIDEO_NEW:
4309 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4310 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4311 break;
4312 default:
4313 return -ENOSYS;
4314 }
4315
4316 return (res)? 0 : -EIO;
4317 }
4318
4319 static int video_autosw_get(void)
4320 {
4321 int autosw = 0;
4322
4323 switch (video_supported) {
4324 case TPACPI_VIDEO_570:
4325 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4326 return -EIO;
4327 break;
4328 case TPACPI_VIDEO_770:
4329 case TPACPI_VIDEO_NEW:
4330 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4331 return -EIO;
4332 break;
4333 default:
4334 return -ENOSYS;
4335 }
4336
4337 return autosw & 1;
4338 }
4339
4340 static int video_autosw_set(int enable)
4341 {
4342 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4343 return -EIO;
4344 return 0;
4345 }
4346
4347 static int video_outputsw_cycle(void)
4348 {
4349 int autosw = video_autosw_get();
4350 int res;
4351
4352 if (autosw < 0)
4353 return autosw;
4354
4355 switch (video_supported) {
4356 case TPACPI_VIDEO_570:
4357 res = video_autosw_set(1);
4358 if (res)
4359 return res;
4360 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4361 break;
4362 case TPACPI_VIDEO_770:
4363 case TPACPI_VIDEO_NEW:
4364 res = video_autosw_set(1);
4365 if (res)
4366 return res;
4367 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4368 break;
4369 default:
4370 return -ENOSYS;
4371 }
4372 if (!autosw && video_autosw_set(autosw)) {
4373 printk(TPACPI_ERR
4374 "video auto-switch left enabled due to error\n");
4375 return -EIO;
4376 }
4377
4378 return (res)? 0 : -EIO;
4379 }
4380
4381 static int video_expand_toggle(void)
4382 {
4383 switch (video_supported) {
4384 case TPACPI_VIDEO_570:
4385 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4386 0 : -EIO;
4387 case TPACPI_VIDEO_770:
4388 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4389 0 : -EIO;
4390 case TPACPI_VIDEO_NEW:
4391 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4392 0 : -EIO;
4393 default:
4394 return -ENOSYS;
4395 }
4396 /* not reached */
4397 }
4398
4399 static int video_read(char *p)
4400 {
4401 int status, autosw;
4402 int len = 0;
4403
4404 if (video_supported == TPACPI_VIDEO_NONE) {
4405 len += sprintf(p + len, "status:\t\tnot supported\n");
4406 return len;
4407 }
4408
4409 status = video_outputsw_get();
4410 if (status < 0)
4411 return status;
4412
4413 autosw = video_autosw_get();
4414 if (autosw < 0)
4415 return autosw;
4416
4417 len += sprintf(p + len, "status:\t\tsupported\n");
4418 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4419 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4420 if (video_supported == TPACPI_VIDEO_NEW)
4421 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4422 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4423 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4424 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4425 if (video_supported == TPACPI_VIDEO_NEW)
4426 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4427 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4428 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4429
4430 return len;
4431 }
4432
4433 static int video_write(char *buf)
4434 {
4435 char *cmd;
4436 int enable, disable, status;
4437 int res;
4438
4439 if (video_supported == TPACPI_VIDEO_NONE)
4440 return -ENODEV;
4441
4442 enable = 0;
4443 disable = 0;
4444
4445 while ((cmd = next_cmd(&buf))) {
4446 if (strlencmp(cmd, "lcd_enable") == 0) {
4447 enable |= TP_ACPI_VIDEO_S_LCD;
4448 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4449 disable |= TP_ACPI_VIDEO_S_LCD;
4450 } else if (strlencmp(cmd, "crt_enable") == 0) {
4451 enable |= TP_ACPI_VIDEO_S_CRT;
4452 } else if (strlencmp(cmd, "crt_disable") == 0) {
4453 disable |= TP_ACPI_VIDEO_S_CRT;
4454 } else if (video_supported == TPACPI_VIDEO_NEW &&
4455 strlencmp(cmd, "dvi_enable") == 0) {
4456 enable |= TP_ACPI_VIDEO_S_DVI;
4457 } else if (video_supported == TPACPI_VIDEO_NEW &&
4458 strlencmp(cmd, "dvi_disable") == 0) {
4459 disable |= TP_ACPI_VIDEO_S_DVI;
4460 } else if (strlencmp(cmd, "auto_enable") == 0) {
4461 res = video_autosw_set(1);
4462 if (res)
4463 return res;
4464 } else if (strlencmp(cmd, "auto_disable") == 0) {
4465 res = video_autosw_set(0);
4466 if (res)
4467 return res;
4468 } else if (strlencmp(cmd, "video_switch") == 0) {
4469 res = video_outputsw_cycle();
4470 if (res)
4471 return res;
4472 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4473 res = video_expand_toggle();
4474 if (res)
4475 return res;
4476 } else
4477 return -EINVAL;
4478 }
4479
4480 if (enable || disable) {
4481 status = video_outputsw_get();
4482 if (status < 0)
4483 return status;
4484 res = video_outputsw_set((status & ~disable) | enable);
4485 if (res)
4486 return res;
4487 }
4488
4489 return 0;
4490 }
4491
4492 static struct ibm_struct video_driver_data = {
4493 .name = "video",
4494 .read = video_read,
4495 .write = video_write,
4496 .exit = video_exit,
4497 };
4498
4499 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4500
4501 /*************************************************************************
4502 * Light (thinklight) subdriver
4503 */
4504
4505 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4506 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4507
4508 static int light_get_status(void)
4509 {
4510 int status = 0;
4511
4512 if (tp_features.light_status) {
4513 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4514 return -EIO;
4515 return (!!status);
4516 }
4517
4518 return -ENXIO;
4519 }
4520
4521 static int light_set_status(int status)
4522 {
4523 int rc;
4524
4525 if (tp_features.light) {
4526 if (cmos_handle) {
4527 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4528 (status)?
4529 TP_CMOS_THINKLIGHT_ON :
4530 TP_CMOS_THINKLIGHT_OFF);
4531 } else {
4532 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4533 (status)? 1 : 0);
4534 }
4535 return (rc)? 0 : -EIO;
4536 }
4537
4538 return -ENXIO;
4539 }
4540
4541 static void light_set_status_worker(struct work_struct *work)
4542 {
4543 struct tpacpi_led_classdev *data =
4544 container_of(work, struct tpacpi_led_classdev, work);
4545
4546 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4547 light_set_status((data->new_state != TPACPI_LED_OFF));
4548 }
4549
4550 static void light_sysfs_set(struct led_classdev *led_cdev,
4551 enum led_brightness brightness)
4552 {
4553 struct tpacpi_led_classdev *data =
4554 container_of(led_cdev,
4555 struct tpacpi_led_classdev,
4556 led_classdev);
4557 data->new_state = (brightness != LED_OFF) ?
4558 TPACPI_LED_ON : TPACPI_LED_OFF;
4559 queue_work(tpacpi_wq, &data->work);
4560 }
4561
4562 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4563 {
4564 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4565 }
4566
4567 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4568 .led_classdev = {
4569 .name = "tpacpi::thinklight",
4570 .brightness_set = &light_sysfs_set,
4571 .brightness_get = &light_sysfs_get,
4572 }
4573 };
4574
4575 static int __init light_init(struct ibm_init_struct *iibm)
4576 {
4577 int rc;
4578
4579 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4580
4581 TPACPI_ACPIHANDLE_INIT(ledb);
4582 TPACPI_ACPIHANDLE_INIT(lght);
4583 TPACPI_ACPIHANDLE_INIT(cmos);
4584 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4585
4586 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4587 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4588
4589 if (tp_features.light)
4590 /* light status not supported on
4591 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4592 tp_features.light_status =
4593 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4594
4595 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4596 str_supported(tp_features.light),
4597 str_supported(tp_features.light_status));
4598
4599 if (!tp_features.light)
4600 return 1;
4601
4602 rc = led_classdev_register(&tpacpi_pdev->dev,
4603 &tpacpi_led_thinklight.led_classdev);
4604
4605 if (rc < 0) {
4606 tp_features.light = 0;
4607 tp_features.light_status = 0;
4608 } else {
4609 rc = 0;
4610 }
4611
4612 return rc;
4613 }
4614
4615 static void light_exit(void)
4616 {
4617 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4618 if (work_pending(&tpacpi_led_thinklight.work))
4619 flush_workqueue(tpacpi_wq);
4620 }
4621
4622 static int light_read(char *p)
4623 {
4624 int len = 0;
4625 int status;
4626
4627 if (!tp_features.light) {
4628 len += sprintf(p + len, "status:\t\tnot supported\n");
4629 } else if (!tp_features.light_status) {
4630 len += sprintf(p + len, "status:\t\tunknown\n");
4631 len += sprintf(p + len, "commands:\ton, off\n");
4632 } else {
4633 status = light_get_status();
4634 if (status < 0)
4635 return status;
4636 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4637 len += sprintf(p + len, "commands:\ton, off\n");
4638 }
4639
4640 return len;
4641 }
4642
4643 static int light_write(char *buf)
4644 {
4645 char *cmd;
4646 int newstatus = 0;
4647
4648 if (!tp_features.light)
4649 return -ENODEV;
4650
4651 while ((cmd = next_cmd(&buf))) {
4652 if (strlencmp(cmd, "on") == 0) {
4653 newstatus = 1;
4654 } else if (strlencmp(cmd, "off") == 0) {
4655 newstatus = 0;
4656 } else
4657 return -EINVAL;
4658 }
4659
4660 return light_set_status(newstatus);
4661 }
4662
4663 static struct ibm_struct light_driver_data = {
4664 .name = "light",
4665 .read = light_read,
4666 .write = light_write,
4667 .exit = light_exit,
4668 };
4669
4670 /*************************************************************************
4671 * CMOS subdriver
4672 */
4673
4674 /* sysfs cmos_command -------------------------------------------------- */
4675 static ssize_t cmos_command_store(struct device *dev,
4676 struct device_attribute *attr,
4677 const char *buf, size_t count)
4678 {
4679 unsigned long cmos_cmd;
4680 int res;
4681
4682 if (parse_strtoul(buf, 21, &cmos_cmd))
4683 return -EINVAL;
4684
4685 res = issue_thinkpad_cmos_command(cmos_cmd);
4686 return (res)? res : count;
4687 }
4688
4689 static struct device_attribute dev_attr_cmos_command =
4690 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4691
4692 /* --------------------------------------------------------------------- */
4693
4694 static int __init cmos_init(struct ibm_init_struct *iibm)
4695 {
4696 int res;
4697
4698 vdbg_printk(TPACPI_DBG_INIT,
4699 "initializing cmos commands subdriver\n");
4700
4701 TPACPI_ACPIHANDLE_INIT(cmos);
4702
4703 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4704 str_supported(cmos_handle != NULL));
4705
4706 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4707 if (res)
4708 return res;
4709
4710 return (cmos_handle)? 0 : 1;
4711 }
4712
4713 static void cmos_exit(void)
4714 {
4715 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4716 }
4717
4718 static int cmos_read(char *p)
4719 {
4720 int len = 0;
4721
4722 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4723 R30, R31, T20-22, X20-21 */
4724 if (!cmos_handle)
4725 len += sprintf(p + len, "status:\t\tnot supported\n");
4726 else {
4727 len += sprintf(p + len, "status:\t\tsupported\n");
4728 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4729 }
4730
4731 return len;
4732 }
4733
4734 static int cmos_write(char *buf)
4735 {
4736 char *cmd;
4737 int cmos_cmd, res;
4738
4739 while ((cmd = next_cmd(&buf))) {
4740 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4741 cmos_cmd >= 0 && cmos_cmd <= 21) {
4742 /* cmos_cmd set */
4743 } else
4744 return -EINVAL;
4745
4746 res = issue_thinkpad_cmos_command(cmos_cmd);
4747 if (res)
4748 return res;
4749 }
4750
4751 return 0;
4752 }
4753
4754 static struct ibm_struct cmos_driver_data = {
4755 .name = "cmos",
4756 .read = cmos_read,
4757 .write = cmos_write,
4758 .exit = cmos_exit,
4759 };
4760
4761 /*************************************************************************
4762 * LED subdriver
4763 */
4764
4765 enum led_access_mode {
4766 TPACPI_LED_NONE = 0,
4767 TPACPI_LED_570, /* 570 */
4768 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4769 TPACPI_LED_NEW, /* all others */
4770 };
4771
4772 enum { /* For TPACPI_LED_OLD */
4773 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4774 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4775 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4776 };
4777
4778 static enum led_access_mode led_supported;
4779
4780 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4781 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4782 /* T20-22, X20-21 */
4783 "LED", /* all others */
4784 ); /* R30, R31 */
4785
4786 #define TPACPI_LED_NUMLEDS 16
4787 static struct tpacpi_led_classdev *tpacpi_leds;
4788 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4789 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4790 /* there's a limit of 19 chars + NULL before 2.6.26 */
4791 "tpacpi::power",
4792 "tpacpi:orange:batt",
4793 "tpacpi:green:batt",
4794 "tpacpi::dock_active",
4795 "tpacpi::bay_active",
4796 "tpacpi::dock_batt",
4797 "tpacpi::unknown_led",
4798 "tpacpi::standby",
4799 "tpacpi::dock_status1",
4800 "tpacpi::dock_status2",
4801 "tpacpi::unknown_led2",
4802 "tpacpi::unknown_led3",
4803 "tpacpi::thinkvantage",
4804 };
4805 #define TPACPI_SAFE_LEDS 0x1081U
4806
4807 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4808 {
4809 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4810 return false;
4811 #else
4812 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4813 #endif
4814 }
4815
4816 static int led_get_status(const unsigned int led)
4817 {
4818 int status;
4819 enum led_status_t led_s;
4820
4821 switch (led_supported) {
4822 case TPACPI_LED_570:
4823 if (!acpi_evalf(ec_handle,
4824 &status, "GLED", "dd", 1 << led))
4825 return -EIO;
4826 led_s = (status == 0)?
4827 TPACPI_LED_OFF :
4828 ((status == 1)?
4829 TPACPI_LED_ON :
4830 TPACPI_LED_BLINK);
4831 tpacpi_led_state_cache[led] = led_s;
4832 return led_s;
4833 default:
4834 return -ENXIO;
4835 }
4836
4837 /* not reached */
4838 }
4839
4840 static int led_set_status(const unsigned int led,
4841 const enum led_status_t ledstatus)
4842 {
4843 /* off, on, blink. Index is led_status_t */
4844 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4845 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4846
4847 int rc = 0;
4848
4849 switch (led_supported) {
4850 case TPACPI_LED_570:
4851 /* 570 */
4852 if (unlikely(led > 7))
4853 return -EINVAL;
4854 if (unlikely(tpacpi_is_led_restricted(led)))
4855 return -EPERM;
4856 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4857 (1 << led), led_sled_arg1[ledstatus]))
4858 rc = -EIO;
4859 break;
4860 case TPACPI_LED_OLD:
4861 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4862 if (unlikely(led > 7))
4863 return -EINVAL;
4864 if (unlikely(tpacpi_is_led_restricted(led)))
4865 return -EPERM;
4866 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4867 if (rc >= 0)
4868 rc = ec_write(TPACPI_LED_EC_HLBL,
4869 (ledstatus == TPACPI_LED_BLINK) << led);
4870 if (rc >= 0)
4871 rc = ec_write(TPACPI_LED_EC_HLCL,
4872 (ledstatus != TPACPI_LED_OFF) << led);
4873 break;
4874 case TPACPI_LED_NEW:
4875 /* all others */
4876 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4877 return -EINVAL;
4878 if (unlikely(tpacpi_is_led_restricted(led)))
4879 return -EPERM;
4880 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4881 led, led_led_arg1[ledstatus]))
4882 rc = -EIO;
4883 break;
4884 default:
4885 rc = -ENXIO;
4886 }
4887
4888 if (!rc)
4889 tpacpi_led_state_cache[led] = ledstatus;
4890
4891 return rc;
4892 }
4893
4894 static void led_set_status_worker(struct work_struct *work)
4895 {
4896 struct tpacpi_led_classdev *data =
4897 container_of(work, struct tpacpi_led_classdev, work);
4898
4899 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4900 led_set_status(data->led, data->new_state);
4901 }
4902
4903 static void led_sysfs_set(struct led_classdev *led_cdev,
4904 enum led_brightness brightness)
4905 {
4906 struct tpacpi_led_classdev *data = container_of(led_cdev,
4907 struct tpacpi_led_classdev, led_classdev);
4908
4909 if (brightness == LED_OFF)
4910 data->new_state = TPACPI_LED_OFF;
4911 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4912 data->new_state = TPACPI_LED_ON;
4913 else
4914 data->new_state = TPACPI_LED_BLINK;
4915
4916 queue_work(tpacpi_wq, &data->work);
4917 }
4918
4919 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4920 unsigned long *delay_on, unsigned long *delay_off)
4921 {
4922 struct tpacpi_led_classdev *data = container_of(led_cdev,
4923 struct tpacpi_led_classdev, led_classdev);
4924
4925 /* Can we choose the flash rate? */
4926 if (*delay_on == 0 && *delay_off == 0) {
4927 /* yes. set them to the hardware blink rate (1 Hz) */
4928 *delay_on = 500; /* ms */
4929 *delay_off = 500; /* ms */
4930 } else if ((*delay_on != 500) || (*delay_off != 500))
4931 return -EINVAL;
4932
4933 data->new_state = TPACPI_LED_BLINK;
4934 queue_work(tpacpi_wq, &data->work);
4935
4936 return 0;
4937 }
4938
4939 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4940 {
4941 int rc;
4942
4943 struct tpacpi_led_classdev *data = container_of(led_cdev,
4944 struct tpacpi_led_classdev, led_classdev);
4945
4946 rc = led_get_status(data->led);
4947
4948 if (rc == TPACPI_LED_OFF || rc < 0)
4949 rc = LED_OFF; /* no error handling in led class :( */
4950 else
4951 rc = LED_FULL;
4952
4953 return rc;
4954 }
4955
4956 static void led_exit(void)
4957 {
4958 unsigned int i;
4959
4960 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4961 if (tpacpi_leds[i].led_classdev.name)
4962 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4963 }
4964
4965 kfree(tpacpi_leds);
4966 }
4967
4968 static int __init tpacpi_init_led(unsigned int led)
4969 {
4970 int rc;
4971
4972 tpacpi_leds[led].led = led;
4973
4974 /* LEDs with no name don't get registered */
4975 if (!tpacpi_led_names[led])
4976 return 0;
4977
4978 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4979 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4980 if (led_supported == TPACPI_LED_570)
4981 tpacpi_leds[led].led_classdev.brightness_get =
4982 &led_sysfs_get;
4983
4984 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4985
4986 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4987
4988 rc = led_classdev_register(&tpacpi_pdev->dev,
4989 &tpacpi_leds[led].led_classdev);
4990 if (rc < 0)
4991 tpacpi_leds[led].led_classdev.name = NULL;
4992
4993 return rc;
4994 }
4995
4996 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
4997 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
4998 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
4999 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5000
5001 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5002 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5003 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5004 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5005 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5006 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5007 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5008 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5009
5010 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5011 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5012 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5013 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5014 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5015
5016 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5017 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5018 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5019 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5020
5021 /* (1) - may have excess leds enabled on MSB */
5022
5023 /* Defaults (order matters, keep last, don't reorder!) */
5024 { /* Lenovo */
5025 .vendor = PCI_VENDOR_ID_LENOVO,
5026 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5027 .quirks = 0x1fffU,
5028 },
5029 { /* IBM ThinkPads with no EC version string */
5030 .vendor = PCI_VENDOR_ID_IBM,
5031 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5032 .quirks = 0x00ffU,
5033 },
5034 { /* IBM ThinkPads with EC version string */
5035 .vendor = PCI_VENDOR_ID_IBM,
5036 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5037 .quirks = 0x00bfU,
5038 },
5039 };
5040
5041 #undef TPACPI_LEDQ_IBM
5042 #undef TPACPI_LEDQ_LNV
5043
5044 static int __init led_init(struct ibm_init_struct *iibm)
5045 {
5046 unsigned int i;
5047 int rc;
5048 unsigned long useful_leds;
5049
5050 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5051
5052 TPACPI_ACPIHANDLE_INIT(led);
5053
5054 if (!led_handle)
5055 /* led not supported on R30, R31 */
5056 led_supported = TPACPI_LED_NONE;
5057 else if (strlencmp(led_path, "SLED") == 0)
5058 /* 570 */
5059 led_supported = TPACPI_LED_570;
5060 else if (strlencmp(led_path, "SYSL") == 0)
5061 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5062 led_supported = TPACPI_LED_OLD;
5063 else
5064 /* all others */
5065 led_supported = TPACPI_LED_NEW;
5066
5067 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5068 str_supported(led_supported), led_supported);
5069
5070 if (led_supported == TPACPI_LED_NONE)
5071 return 1;
5072
5073 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5074 GFP_KERNEL);
5075 if (!tpacpi_leds) {
5076 printk(TPACPI_ERR "Out of memory for LED data\n");
5077 return -ENOMEM;
5078 }
5079
5080 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5081 ARRAY_SIZE(led_useful_qtable));
5082
5083 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5084 if (!tpacpi_is_led_restricted(i) &&
5085 test_bit(i, &useful_leds)) {
5086 rc = tpacpi_init_led(i);
5087 if (rc < 0) {
5088 led_exit();
5089 return rc;
5090 }
5091 }
5092 }
5093
5094 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5095 printk(TPACPI_NOTICE
5096 "warning: userspace override of important "
5097 "firmware LEDs is enabled\n");
5098 #endif
5099 return 0;
5100 }
5101
5102 #define str_led_status(s) \
5103 ((s) == TPACPI_LED_OFF ? "off" : \
5104 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5105
5106 static int led_read(char *p)
5107 {
5108 int len = 0;
5109
5110 if (!led_supported) {
5111 len += sprintf(p + len, "status:\t\tnot supported\n");
5112 return len;
5113 }
5114 len += sprintf(p + len, "status:\t\tsupported\n");
5115
5116 if (led_supported == TPACPI_LED_570) {
5117 /* 570 */
5118 int i, status;
5119 for (i = 0; i < 8; i++) {
5120 status = led_get_status(i);
5121 if (status < 0)
5122 return -EIO;
5123 len += sprintf(p + len, "%d:\t\t%s\n",
5124 i, str_led_status(status));
5125 }
5126 }
5127
5128 len += sprintf(p + len, "commands:\t"
5129 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5130
5131 return len;
5132 }
5133
5134 static int led_write(char *buf)
5135 {
5136 char *cmd;
5137 int led, rc;
5138 enum led_status_t s;
5139
5140 if (!led_supported)
5141 return -ENODEV;
5142
5143 while ((cmd = next_cmd(&buf))) {
5144 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5145 return -EINVAL;
5146
5147 if (strstr(cmd, "off")) {
5148 s = TPACPI_LED_OFF;
5149 } else if (strstr(cmd, "on")) {
5150 s = TPACPI_LED_ON;
5151 } else if (strstr(cmd, "blink")) {
5152 s = TPACPI_LED_BLINK;
5153 } else {
5154 return -EINVAL;
5155 }
5156
5157 rc = led_set_status(led, s);
5158 if (rc < 0)
5159 return rc;
5160 }
5161
5162 return 0;
5163 }
5164
5165 static struct ibm_struct led_driver_data = {
5166 .name = "led",
5167 .read = led_read,
5168 .write = led_write,
5169 .exit = led_exit,
5170 };
5171
5172 /*************************************************************************
5173 * Beep subdriver
5174 */
5175
5176 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5177
5178 #define TPACPI_BEEP_Q1 0x0001
5179
5180 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5181 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5182 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5183 };
5184
5185 static int __init beep_init(struct ibm_init_struct *iibm)
5186 {
5187 unsigned long quirks;
5188
5189 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5190
5191 TPACPI_ACPIHANDLE_INIT(beep);
5192
5193 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5194 str_supported(beep_handle != NULL));
5195
5196 quirks = tpacpi_check_quirks(beep_quirk_table,
5197 ARRAY_SIZE(beep_quirk_table));
5198
5199 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5200
5201 return (beep_handle)? 0 : 1;
5202 }
5203
5204 static int beep_read(char *p)
5205 {
5206 int len = 0;
5207
5208 if (!beep_handle)
5209 len += sprintf(p + len, "status:\t\tnot supported\n");
5210 else {
5211 len += sprintf(p + len, "status:\t\tsupported\n");
5212 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5213 }
5214
5215 return len;
5216 }
5217
5218 static int beep_write(char *buf)
5219 {
5220 char *cmd;
5221 int beep_cmd;
5222
5223 if (!beep_handle)
5224 return -ENODEV;
5225
5226 while ((cmd = next_cmd(&buf))) {
5227 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5228 beep_cmd >= 0 && beep_cmd <= 17) {
5229 /* beep_cmd set */
5230 } else
5231 return -EINVAL;
5232 if (tp_features.beep_needs_two_args) {
5233 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5234 beep_cmd, 0))
5235 return -EIO;
5236 } else {
5237 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5238 beep_cmd))
5239 return -EIO;
5240 }
5241 }
5242
5243 return 0;
5244 }
5245
5246 static struct ibm_struct beep_driver_data = {
5247 .name = "beep",
5248 .read = beep_read,
5249 .write = beep_write,
5250 };
5251
5252 /*************************************************************************
5253 * Thermal subdriver
5254 */
5255
5256 enum thermal_access_mode {
5257 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5258 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5259 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5260 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5261 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5262 };
5263
5264 enum { /* TPACPI_THERMAL_TPEC_* */
5265 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5266 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5267 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5268 };
5269
5270 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5271 struct ibm_thermal_sensors_struct {
5272 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5273 };
5274
5275 static enum thermal_access_mode thermal_read_mode;
5276
5277 /* idx is zero-based */
5278 static int thermal_get_sensor(int idx, s32 *value)
5279 {
5280 int t;
5281 s8 tmp;
5282 char tmpi[5];
5283
5284 t = TP_EC_THERMAL_TMP0;
5285
5286 switch (thermal_read_mode) {
5287 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5288 case TPACPI_THERMAL_TPEC_16:
5289 if (idx >= 8 && idx <= 15) {
5290 t = TP_EC_THERMAL_TMP8;
5291 idx -= 8;
5292 }
5293 /* fallthrough */
5294 #endif
5295 case TPACPI_THERMAL_TPEC_8:
5296 if (idx <= 7) {
5297 if (!acpi_ec_read(t + idx, &tmp))
5298 return -EIO;
5299 *value = tmp * 1000;
5300 return 0;
5301 }
5302 break;
5303
5304 case TPACPI_THERMAL_ACPI_UPDT:
5305 if (idx <= 7) {
5306 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5307 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5308 return -EIO;
5309 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5310 return -EIO;
5311 *value = (t - 2732) * 100;
5312 return 0;
5313 }
5314 break;
5315
5316 case TPACPI_THERMAL_ACPI_TMP07:
5317 if (idx <= 7) {
5318 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5319 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5320 return -EIO;
5321 if (t > 127 || t < -127)
5322 t = TP_EC_THERMAL_TMP_NA;
5323 *value = t * 1000;
5324 return 0;
5325 }
5326 break;
5327
5328 case TPACPI_THERMAL_NONE:
5329 default:
5330 return -ENOSYS;
5331 }
5332
5333 return -EINVAL;
5334 }
5335
5336 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5337 {
5338 int res, i;
5339 int n;
5340
5341 n = 8;
5342 i = 0;
5343
5344 if (!s)
5345 return -EINVAL;
5346
5347 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5348 n = 16;
5349
5350 for (i = 0 ; i < n; i++) {
5351 res = thermal_get_sensor(i, &s->temp[i]);
5352 if (res)
5353 return res;
5354 }
5355
5356 return n;
5357 }
5358
5359 /* sysfs temp##_input -------------------------------------------------- */
5360
5361 static ssize_t thermal_temp_input_show(struct device *dev,
5362 struct device_attribute *attr,
5363 char *buf)
5364 {
5365 struct sensor_device_attribute *sensor_attr =
5366 to_sensor_dev_attr(attr);
5367 int idx = sensor_attr->index;
5368 s32 value;
5369 int res;
5370
5371 res = thermal_get_sensor(idx, &value);
5372 if (res)
5373 return res;
5374 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5375 return -ENXIO;
5376
5377 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5378 }
5379
5380 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5381 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5382 thermal_temp_input_show, NULL, _idxB)
5383
5384 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5385 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5386 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5387 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5388 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5389 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5390 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5391 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5392 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5393 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5394 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5395 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5396 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5397 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5398 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5399 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5400 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5401 };
5402
5403 #define THERMAL_ATTRS(X) \
5404 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5405
5406 static struct attribute *thermal_temp_input_attr[] = {
5407 THERMAL_ATTRS(8),
5408 THERMAL_ATTRS(9),
5409 THERMAL_ATTRS(10),
5410 THERMAL_ATTRS(11),
5411 THERMAL_ATTRS(12),
5412 THERMAL_ATTRS(13),
5413 THERMAL_ATTRS(14),
5414 THERMAL_ATTRS(15),
5415 THERMAL_ATTRS(0),
5416 THERMAL_ATTRS(1),
5417 THERMAL_ATTRS(2),
5418 THERMAL_ATTRS(3),
5419 THERMAL_ATTRS(4),
5420 THERMAL_ATTRS(5),
5421 THERMAL_ATTRS(6),
5422 THERMAL_ATTRS(7),
5423 NULL
5424 };
5425
5426 static const struct attribute_group thermal_temp_input16_group = {
5427 .attrs = thermal_temp_input_attr
5428 };
5429
5430 static const struct attribute_group thermal_temp_input8_group = {
5431 .attrs = &thermal_temp_input_attr[8]
5432 };
5433
5434 #undef THERMAL_SENSOR_ATTR_TEMP
5435 #undef THERMAL_ATTRS
5436
5437 /* --------------------------------------------------------------------- */
5438
5439 static int __init thermal_init(struct ibm_init_struct *iibm)
5440 {
5441 u8 t, ta1, ta2;
5442 int i;
5443 int acpi_tmp7;
5444 int res;
5445
5446 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5447
5448 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5449
5450 if (thinkpad_id.ec_model) {
5451 /*
5452 * Direct EC access mode: sensors at registers
5453 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5454 * non-implemented, thermal sensors return 0x80 when
5455 * not available
5456 */
5457
5458 ta1 = ta2 = 0;
5459 for (i = 0; i < 8; i++) {
5460 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5461 ta1 |= t;
5462 } else {
5463 ta1 = 0;
5464 break;
5465 }
5466 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5467 ta2 |= t;
5468 } else {
5469 ta1 = 0;
5470 break;
5471 }
5472 }
5473 if (ta1 == 0) {
5474 /* This is sheer paranoia, but we handle it anyway */
5475 if (acpi_tmp7) {
5476 printk(TPACPI_ERR
5477 "ThinkPad ACPI EC access misbehaving, "
5478 "falling back to ACPI TMPx access "
5479 "mode\n");
5480 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5481 } else {
5482 printk(TPACPI_ERR
5483 "ThinkPad ACPI EC access misbehaving, "
5484 "disabling thermal sensors access\n");
5485 thermal_read_mode = TPACPI_THERMAL_NONE;
5486 }
5487 } else {
5488 thermal_read_mode =
5489 (ta2 != 0) ?
5490 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5491 }
5492 } else if (acpi_tmp7) {
5493 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5494 /* 600e/x, 770e, 770x */
5495 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5496 } else {
5497 /* Standard ACPI TMPx access, max 8 sensors */
5498 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5499 }
5500 } else {
5501 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5502 thermal_read_mode = TPACPI_THERMAL_NONE;
5503 }
5504
5505 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5506 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5507 thermal_read_mode);
5508
5509 switch (thermal_read_mode) {
5510 case TPACPI_THERMAL_TPEC_16:
5511 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5512 &thermal_temp_input16_group);
5513 if (res)
5514 return res;
5515 break;
5516 case TPACPI_THERMAL_TPEC_8:
5517 case TPACPI_THERMAL_ACPI_TMP07:
5518 case TPACPI_THERMAL_ACPI_UPDT:
5519 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5520 &thermal_temp_input8_group);
5521 if (res)
5522 return res;
5523 break;
5524 case TPACPI_THERMAL_NONE:
5525 default:
5526 return 1;
5527 }
5528
5529 return 0;
5530 }
5531
5532 static void thermal_exit(void)
5533 {
5534 switch (thermal_read_mode) {
5535 case TPACPI_THERMAL_TPEC_16:
5536 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5537 &thermal_temp_input16_group);
5538 break;
5539 case TPACPI_THERMAL_TPEC_8:
5540 case TPACPI_THERMAL_ACPI_TMP07:
5541 case TPACPI_THERMAL_ACPI_UPDT:
5542 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5543 &thermal_temp_input16_group);
5544 break;
5545 case TPACPI_THERMAL_NONE:
5546 default:
5547 break;
5548 }
5549 }
5550
5551 static int thermal_read(char *p)
5552 {
5553 int len = 0;
5554 int n, i;
5555 struct ibm_thermal_sensors_struct t;
5556
5557 n = thermal_get_sensors(&t);
5558 if (unlikely(n < 0))
5559 return n;
5560
5561 len += sprintf(p + len, "temperatures:\t");
5562
5563 if (n > 0) {
5564 for (i = 0; i < (n - 1); i++)
5565 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5566 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5567 } else
5568 len += sprintf(p + len, "not supported\n");
5569
5570 return len;
5571 }
5572
5573 static struct ibm_struct thermal_driver_data = {
5574 .name = "thermal",
5575 .read = thermal_read,
5576 .exit = thermal_exit,
5577 };
5578
5579 /*************************************************************************
5580 * EC Dump subdriver
5581 */
5582
5583 static u8 ecdump_regs[256];
5584
5585 static int ecdump_read(char *p)
5586 {
5587 int len = 0;
5588 int i, j;
5589 u8 v;
5590
5591 len += sprintf(p + len, "EC "
5592 " +00 +01 +02 +03 +04 +05 +06 +07"
5593 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5594 for (i = 0; i < 256; i += 16) {
5595 len += sprintf(p + len, "EC 0x%02x:", i);
5596 for (j = 0; j < 16; j++) {
5597 if (!acpi_ec_read(i + j, &v))
5598 break;
5599 if (v != ecdump_regs[i + j])
5600 len += sprintf(p + len, " *%02x", v);
5601 else
5602 len += sprintf(p + len, " %02x", v);
5603 ecdump_regs[i + j] = v;
5604 }
5605 len += sprintf(p + len, "\n");
5606 if (j != 16)
5607 break;
5608 }
5609
5610 /* These are way too dangerous to advertise openly... */
5611 #if 0
5612 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5613 " (<offset> is 00-ff, <value> is 00-ff)\n");
5614 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5615 " (<offset> is 00-ff, <value> is 0-255)\n");
5616 #endif
5617 return len;
5618 }
5619
5620 static int ecdump_write(char *buf)
5621 {
5622 char *cmd;
5623 int i, v;
5624
5625 while ((cmd = next_cmd(&buf))) {
5626 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5627 /* i and v set */
5628 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5629 /* i and v set */
5630 } else
5631 return -EINVAL;
5632 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5633 if (!acpi_ec_write(i, v))
5634 return -EIO;
5635 } else
5636 return -EINVAL;
5637 }
5638
5639 return 0;
5640 }
5641
5642 static struct ibm_struct ecdump_driver_data = {
5643 .name = "ecdump",
5644 .read = ecdump_read,
5645 .write = ecdump_write,
5646 .flags.experimental = 1,
5647 };
5648
5649 /*************************************************************************
5650 * Backlight/brightness subdriver
5651 */
5652
5653 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5654
5655 /*
5656 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5657 * CMOS NVRAM byte 0x5E, bits 0-3.
5658 *
5659 * EC HBRV (0x31) has the following layout
5660 * Bit 7: unknown function
5661 * Bit 6: unknown function
5662 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5663 * Bit 4: must be set to zero to avoid problems
5664 * Bit 3-0: backlight brightness level
5665 *
5666 * brightness_get_raw returns status data in the HBRV layout
5667 *
5668 * WARNING: The X61 has been verified to use HBRV for something else, so
5669 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5670 * testing on the very early *60 Lenovo models...
5671 */
5672
5673 enum {
5674 TP_EC_BACKLIGHT = 0x31,
5675
5676 /* TP_EC_BACKLIGHT bitmasks */
5677 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5678 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5679 TP_EC_BACKLIGHT_MAPSW = 0x20,
5680 };
5681
5682 enum tpacpi_brightness_access_mode {
5683 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5684 TPACPI_BRGHT_MODE_EC, /* EC control */
5685 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5686 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5687 TPACPI_BRGHT_MODE_MAX
5688 };
5689
5690 static struct backlight_device *ibm_backlight_device;
5691
5692 static enum tpacpi_brightness_access_mode brightness_mode =
5693 TPACPI_BRGHT_MODE_MAX;
5694
5695 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5696
5697 static struct mutex brightness_mutex;
5698
5699 /* NVRAM brightness access,
5700 * call with brightness_mutex held! */
5701 static unsigned int tpacpi_brightness_nvram_get(void)
5702 {
5703 u8 lnvram;
5704
5705 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5706 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5707 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5708 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5709
5710 return lnvram;
5711 }
5712
5713 static void tpacpi_brightness_checkpoint_nvram(void)
5714 {
5715 u8 lec = 0;
5716 u8 b_nvram;
5717
5718 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5719 return;
5720
5721 vdbg_printk(TPACPI_DBG_BRGHT,
5722 "trying to checkpoint backlight level to NVRAM...\n");
5723
5724 if (mutex_lock_killable(&brightness_mutex) < 0)
5725 return;
5726
5727 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5728 goto unlock;
5729 lec &= TP_EC_BACKLIGHT_LVLMSK;
5730 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5731
5732 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5733 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5734 /* NVRAM needs update */
5735 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5736 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5737 b_nvram |= lec;
5738 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5739 dbg_printk(TPACPI_DBG_BRGHT,
5740 "updated NVRAM backlight level to %u (0x%02x)\n",
5741 (unsigned int) lec, (unsigned int) b_nvram);
5742 } else
5743 vdbg_printk(TPACPI_DBG_BRGHT,
5744 "NVRAM backlight level already is %u (0x%02x)\n",
5745 (unsigned int) lec, (unsigned int) b_nvram);
5746
5747 unlock:
5748 mutex_unlock(&brightness_mutex);
5749 }
5750
5751
5752 /* call with brightness_mutex held! */
5753 static int tpacpi_brightness_get_raw(int *status)
5754 {
5755 u8 lec = 0;
5756
5757 switch (brightness_mode) {
5758 case TPACPI_BRGHT_MODE_UCMS_STEP:
5759 *status = tpacpi_brightness_nvram_get();
5760 return 0;
5761 case TPACPI_BRGHT_MODE_EC:
5762 case TPACPI_BRGHT_MODE_ECNVRAM:
5763 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5764 return -EIO;
5765 *status = lec;
5766 return 0;
5767 default:
5768 return -ENXIO;
5769 }
5770 }
5771
5772 /* call with brightness_mutex held! */
5773 /* do NOT call with illegal backlight level value */
5774 static int tpacpi_brightness_set_ec(unsigned int value)
5775 {
5776 u8 lec = 0;
5777
5778 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5779 return -EIO;
5780
5781 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5782 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5783 (value & TP_EC_BACKLIGHT_LVLMSK))))
5784 return -EIO;
5785
5786 return 0;
5787 }
5788
5789 /* call with brightness_mutex held! */
5790 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5791 {
5792 int cmos_cmd, inc;
5793 unsigned int current_value, i;
5794
5795 current_value = tpacpi_brightness_nvram_get();
5796
5797 if (value == current_value)
5798 return 0;
5799
5800 cmos_cmd = (value > current_value) ?
5801 TP_CMOS_BRIGHTNESS_UP :
5802 TP_CMOS_BRIGHTNESS_DOWN;
5803 inc = (value > current_value) ? 1 : -1;
5804
5805 for (i = current_value; i != value; i += inc)
5806 if (issue_thinkpad_cmos_command(cmos_cmd))
5807 return -EIO;
5808
5809 return 0;
5810 }
5811
5812 /* May return EINTR which can always be mapped to ERESTARTSYS */
5813 static int brightness_set(unsigned int value)
5814 {
5815 int res;
5816
5817 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5818 value < 0)
5819 return -EINVAL;
5820
5821 vdbg_printk(TPACPI_DBG_BRGHT,
5822 "set backlight level to %d\n", value);
5823
5824 res = mutex_lock_killable(&brightness_mutex);
5825 if (res < 0)
5826 return res;
5827
5828 switch (brightness_mode) {
5829 case TPACPI_BRGHT_MODE_EC:
5830 case TPACPI_BRGHT_MODE_ECNVRAM:
5831 res = tpacpi_brightness_set_ec(value);
5832 break;
5833 case TPACPI_BRGHT_MODE_UCMS_STEP:
5834 res = tpacpi_brightness_set_ucmsstep(value);
5835 break;
5836 default:
5837 res = -ENXIO;
5838 }
5839
5840 mutex_unlock(&brightness_mutex);
5841 return res;
5842 }
5843
5844 /* sysfs backlight class ----------------------------------------------- */
5845
5846 static int brightness_update_status(struct backlight_device *bd)
5847 {
5848 unsigned int level =
5849 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5850 bd->props.power == FB_BLANK_UNBLANK) ?
5851 bd->props.brightness : 0;
5852
5853 dbg_printk(TPACPI_DBG_BRGHT,
5854 "backlight: attempt to set level to %d\n",
5855 level);
5856
5857 /* it is the backlight class's job (caller) to handle
5858 * EINTR and other errors properly */
5859 return brightness_set(level);
5860 }
5861
5862 static int brightness_get(struct backlight_device *bd)
5863 {
5864 int status, res;
5865
5866 res = mutex_lock_killable(&brightness_mutex);
5867 if (res < 0)
5868 return 0;
5869
5870 res = tpacpi_brightness_get_raw(&status);
5871
5872 mutex_unlock(&brightness_mutex);
5873
5874 if (res < 0)
5875 return 0;
5876
5877 return status & TP_EC_BACKLIGHT_LVLMSK;
5878 }
5879
5880 static struct backlight_ops ibm_backlight_data = {
5881 .get_brightness = brightness_get,
5882 .update_status = brightness_update_status,
5883 };
5884
5885 /* --------------------------------------------------------------------- */
5886
5887 /*
5888 * These are only useful for models that have only one possibility
5889 * of GPU. If the BIOS model handles both ATI and Intel, don't use
5890 * these quirks.
5891 */
5892 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
5893 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
5894 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
5895
5896 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
5897 /* Models with ATI GPUs known to require ECNVRAM mode */
5898 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
5899
5900 /* Models with ATI GPUs that can use ECNVRAM */
5901 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
5902 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5903 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5904 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5905
5906 /* Models with Intel Extreme Graphics 2 */
5907 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
5908 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5909 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5910
5911 /* Models with Intel GMA900 */
5912 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
5913 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
5914 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
5915 };
5916
5917 static int __init brightness_init(struct ibm_init_struct *iibm)
5918 {
5919 int b;
5920 unsigned long quirks;
5921
5922 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5923
5924 mutex_init(&brightness_mutex);
5925
5926 quirks = tpacpi_check_quirks(brightness_quirk_table,
5927 ARRAY_SIZE(brightness_quirk_table));
5928
5929 /*
5930 * We always attempt to detect acpi support, so as to switch
5931 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5932 * going to publish a backlight interface
5933 */
5934 b = tpacpi_check_std_acpi_brightness_support();
5935 if (b > 0) {
5936
5937 if (acpi_video_backlight_support()) {
5938 if (brightness_enable > 1) {
5939 printk(TPACPI_NOTICE
5940 "Standard ACPI backlight interface "
5941 "available, not loading native one.\n");
5942 return 1;
5943 } else if (brightness_enable == 1) {
5944 printk(TPACPI_NOTICE
5945 "Backlight control force enabled, even if standard "
5946 "ACPI backlight interface is available\n");
5947 }
5948 } else {
5949 if (brightness_enable > 1) {
5950 printk(TPACPI_NOTICE
5951 "Standard ACPI backlight interface not "
5952 "available, thinkpad_acpi native "
5953 "brightness control enabled\n");
5954 }
5955 }
5956 }
5957
5958 if (!brightness_enable) {
5959 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5960 "brightness support disabled by "
5961 "module parameter\n");
5962 return 1;
5963 }
5964
5965 if (b > 16) {
5966 printk(TPACPI_ERR
5967 "Unsupported brightness interface, "
5968 "please contact %s\n", TPACPI_MAIL);
5969 return 1;
5970 }
5971 if (b == 16)
5972 tp_features.bright_16levels = 1;
5973
5974 /*
5975 * Check for module parameter bogosity, note that we
5976 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5977 * able to detect "unspecified"
5978 */
5979 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5980 return -EINVAL;
5981
5982 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5983 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5984 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5985 if (quirks & TPACPI_BRGHT_Q_EC)
5986 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5987 else
5988 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5989
5990 dbg_printk(TPACPI_DBG_BRGHT,
5991 "driver auto-selected brightness_mode=%d\n",
5992 brightness_mode);
5993 }
5994
5995 /* Safety */
5996 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
5997 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
5998 brightness_mode == TPACPI_BRGHT_MODE_EC))
5999 return -EINVAL;
6000
6001 if (tpacpi_brightness_get_raw(&b) < 0)
6002 return 1;
6003
6004 if (tp_features.bright_16levels)
6005 printk(TPACPI_INFO
6006 "detected a 16-level brightness capable ThinkPad\n");
6007
6008 ibm_backlight_device = backlight_device_register(
6009 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6010 &ibm_backlight_data);
6011 if (IS_ERR(ibm_backlight_device)) {
6012 printk(TPACPI_ERR "Could not register backlight device\n");
6013 return PTR_ERR(ibm_backlight_device);
6014 }
6015 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6016 "brightness is supported\n");
6017
6018 if (quirks & TPACPI_BRGHT_Q_ASK) {
6019 printk(TPACPI_NOTICE
6020 "brightness: will use unverified default: "
6021 "brightness_mode=%d\n", brightness_mode);
6022 printk(TPACPI_NOTICE
6023 "brightness: please report to %s whether it works well "
6024 "or not on your ThinkPad\n", TPACPI_MAIL);
6025 }
6026
6027 ibm_backlight_device->props.max_brightness =
6028 (tp_features.bright_16levels)? 15 : 7;
6029 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6030 backlight_update_status(ibm_backlight_device);
6031
6032 return 0;
6033 }
6034
6035 static void brightness_suspend(pm_message_t state)
6036 {
6037 tpacpi_brightness_checkpoint_nvram();
6038 }
6039
6040 static void brightness_shutdown(void)
6041 {
6042 tpacpi_brightness_checkpoint_nvram();
6043 }
6044
6045 static void brightness_exit(void)
6046 {
6047 if (ibm_backlight_device) {
6048 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6049 "calling backlight_device_unregister()\n");
6050 backlight_device_unregister(ibm_backlight_device);
6051 }
6052
6053 tpacpi_brightness_checkpoint_nvram();
6054 }
6055
6056 static int brightness_read(char *p)
6057 {
6058 int len = 0;
6059 int level;
6060
6061 level = brightness_get(NULL);
6062 if (level < 0) {
6063 len += sprintf(p + len, "level:\t\tunreadable\n");
6064 } else {
6065 len += sprintf(p + len, "level:\t\t%d\n", level);
6066 len += sprintf(p + len, "commands:\tup, down\n");
6067 len += sprintf(p + len, "commands:\tlevel <level>"
6068 " (<level> is 0-%d)\n",
6069 (tp_features.bright_16levels) ? 15 : 7);
6070 }
6071
6072 return len;
6073 }
6074
6075 static int brightness_write(char *buf)
6076 {
6077 int level;
6078 int rc;
6079 char *cmd;
6080 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6081
6082 level = brightness_get(NULL);
6083 if (level < 0)
6084 return level;
6085
6086 while ((cmd = next_cmd(&buf))) {
6087 if (strlencmp(cmd, "up") == 0) {
6088 if (level < max_level)
6089 level++;
6090 } else if (strlencmp(cmd, "down") == 0) {
6091 if (level > 0)
6092 level--;
6093 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6094 level >= 0 && level <= max_level) {
6095 /* new level set */
6096 } else
6097 return -EINVAL;
6098 }
6099
6100 tpacpi_disclose_usertask("procfs brightness",
6101 "set level to %d\n", level);
6102
6103 /*
6104 * Now we know what the final level should be, so we try to set it.
6105 * Doing it this way makes the syscall restartable in case of EINTR
6106 */
6107 rc = brightness_set(level);
6108 return (rc == -EINTR)? ERESTARTSYS : rc;
6109 }
6110
6111 static struct ibm_struct brightness_driver_data = {
6112 .name = "brightness",
6113 .read = brightness_read,
6114 .write = brightness_write,
6115 .exit = brightness_exit,
6116 .suspend = brightness_suspend,
6117 .shutdown = brightness_shutdown,
6118 };
6119
6120 /*************************************************************************
6121 * Volume subdriver
6122 */
6123
6124 static int volume_offset = 0x30;
6125
6126 static int volume_read(char *p)
6127 {
6128 int len = 0;
6129 u8 level;
6130
6131 if (!acpi_ec_read(volume_offset, &level)) {
6132 len += sprintf(p + len, "level:\t\tunreadable\n");
6133 } else {
6134 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6135 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6136 len += sprintf(p + len, "commands:\tup, down, mute\n");
6137 len += sprintf(p + len, "commands:\tlevel <level>"
6138 " (<level> is 0-15)\n");
6139 }
6140
6141 return len;
6142 }
6143
6144 static int volume_write(char *buf)
6145 {
6146 int cmos_cmd, inc, i;
6147 u8 level, mute;
6148 int new_level, new_mute;
6149 char *cmd;
6150
6151 while ((cmd = next_cmd(&buf))) {
6152 if (!acpi_ec_read(volume_offset, &level))
6153 return -EIO;
6154 new_mute = mute = level & 0x40;
6155 new_level = level = level & 0xf;
6156
6157 if (strlencmp(cmd, "up") == 0) {
6158 if (mute)
6159 new_mute = 0;
6160 else
6161 new_level = level == 15 ? 15 : level + 1;
6162 } else if (strlencmp(cmd, "down") == 0) {
6163 if (mute)
6164 new_mute = 0;
6165 else
6166 new_level = level == 0 ? 0 : level - 1;
6167 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6168 new_level >= 0 && new_level <= 15) {
6169 /* new_level set */
6170 } else if (strlencmp(cmd, "mute") == 0) {
6171 new_mute = 0x40;
6172 } else
6173 return -EINVAL;
6174
6175 if (new_level != level) {
6176 /* mute doesn't change */
6177
6178 cmos_cmd = (new_level > level) ?
6179 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6180 inc = new_level > level ? 1 : -1;
6181
6182 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6183 !acpi_ec_write(volume_offset, level)))
6184 return -EIO;
6185
6186 for (i = level; i != new_level; i += inc)
6187 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6188 !acpi_ec_write(volume_offset, i + inc))
6189 return -EIO;
6190
6191 if (mute &&
6192 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6193 !acpi_ec_write(volume_offset, new_level + mute))) {
6194 return -EIO;
6195 }
6196 }
6197
6198 if (new_mute != mute) {
6199 /* level doesn't change */
6200
6201 cmos_cmd = (new_mute) ?
6202 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6203
6204 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6205 !acpi_ec_write(volume_offset, level + new_mute))
6206 return -EIO;
6207 }
6208 }
6209
6210 return 0;
6211 }
6212
6213 static struct ibm_struct volume_driver_data = {
6214 .name = "volume",
6215 .read = volume_read,
6216 .write = volume_write,
6217 };
6218
6219 /*************************************************************************
6220 * Fan subdriver
6221 */
6222
6223 /*
6224 * FAN ACCESS MODES
6225 *
6226 * TPACPI_FAN_RD_ACPI_GFAN:
6227 * ACPI GFAN method: returns fan level
6228 *
6229 * see TPACPI_FAN_WR_ACPI_SFAN
6230 * EC 0x2f (HFSP) not available if GFAN exists
6231 *
6232 * TPACPI_FAN_WR_ACPI_SFAN:
6233 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6234 *
6235 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6236 * it for writing.
6237 *
6238 * TPACPI_FAN_WR_TPEC:
6239 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6240 * Supported on almost all ThinkPads
6241 *
6242 * Fan speed changes of any sort (including those caused by the
6243 * disengaged mode) are usually done slowly by the firmware as the
6244 * maximum ammount of fan duty cycle change per second seems to be
6245 * limited.
6246 *
6247 * Reading is not available if GFAN exists.
6248 * Writing is not available if SFAN exists.
6249 *
6250 * Bits
6251 * 7 automatic mode engaged;
6252 * (default operation mode of the ThinkPad)
6253 * fan level is ignored in this mode.
6254 * 6 full speed mode (takes precedence over bit 7);
6255 * not available on all thinkpads. May disable
6256 * the tachometer while the fan controller ramps up
6257 * the speed (which can take up to a few *minutes*).
6258 * Speeds up fan to 100% duty-cycle, which is far above
6259 * the standard RPM levels. It is not impossible that
6260 * it could cause hardware damage.
6261 * 5-3 unused in some models. Extra bits for fan level
6262 * in others, but still useless as all values above
6263 * 7 map to the same speed as level 7 in these models.
6264 * 2-0 fan level (0..7 usually)
6265 * 0x00 = stop
6266 * 0x07 = max (set when temperatures critical)
6267 * Some ThinkPads may have other levels, see
6268 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6269 *
6270 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6271 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6272 * does so, its initial value is meaningless (0x07).
6273 *
6274 * For firmware bugs, refer to:
6275 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6276 *
6277 * ----
6278 *
6279 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6280 * Main fan tachometer reading (in RPM)
6281 *
6282 * This register is present on all ThinkPads with a new-style EC, and
6283 * it is known not to be present on the A21m/e, and T22, as there is
6284 * something else in offset 0x84 according to the ACPI DSDT. Other
6285 * ThinkPads from this same time period (and earlier) probably lack the
6286 * tachometer as well.
6287 *
6288 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6289 * was never fixed by IBM to report the EC firmware version string
6290 * probably support the tachometer (like the early X models), so
6291 * detecting it is quite hard. We need more data to know for sure.
6292 *
6293 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6294 * might result.
6295 *
6296 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6297 * mode.
6298 *
6299 * For firmware bugs, refer to:
6300 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6301 *
6302 * ----
6303 *
6304 * ThinkPad EC register 0x31 bit 0 (only on select models)
6305 *
6306 * When bit 0 of EC register 0x31 is zero, the tachometer registers
6307 * show the speed of the main fan. When bit 0 of EC register 0x31
6308 * is one, the tachometer registers show the speed of the auxiliary
6309 * fan.
6310 *
6311 * Fan control seems to affect both fans, regardless of the state
6312 * of this bit.
6313 *
6314 * So far, only the firmware for the X60/X61 non-tablet versions
6315 * seem to support this (firmware TP-7M).
6316 *
6317 * TPACPI_FAN_WR_ACPI_FANS:
6318 * ThinkPad X31, X40, X41. Not available in the X60.
6319 *
6320 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6321 * high speed. ACPI DSDT seems to map these three speeds to levels
6322 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6323 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6324 *
6325 * The speeds are stored on handles
6326 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6327 *
6328 * There are three default speed sets, acessible as handles:
6329 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6330 *
6331 * ACPI DSDT switches which set is in use depending on various
6332 * factors.
6333 *
6334 * TPACPI_FAN_WR_TPEC is also available and should be used to
6335 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6336 * but the ACPI tables just mention level 7.
6337 */
6338
6339 enum { /* Fan control constants */
6340 fan_status_offset = 0x2f, /* EC register 0x2f */
6341 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6342 * 0x84 must be read before 0x85 */
6343 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
6344 bit 0 selects which fan is active */
6345
6346 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6347 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6348
6349 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6350 };
6351
6352 enum fan_status_access_mode {
6353 TPACPI_FAN_NONE = 0, /* No fan status or control */
6354 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6355 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6356 };
6357
6358 enum fan_control_access_mode {
6359 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6360 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6361 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6362 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6363 };
6364
6365 enum fan_control_commands {
6366 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6367 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6368 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6369 * and also watchdog cmd */
6370 };
6371
6372 static int fan_control_allowed;
6373
6374 static enum fan_status_access_mode fan_status_access_mode;
6375 static enum fan_control_access_mode fan_control_access_mode;
6376 static enum fan_control_commands fan_control_commands;
6377
6378 static u8 fan_control_initial_status;
6379 static u8 fan_control_desired_level;
6380 static u8 fan_control_resume_level;
6381 static int fan_watchdog_maxinterval;
6382
6383 static struct mutex fan_mutex;
6384
6385 static void fan_watchdog_fire(struct work_struct *ignored);
6386 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6387
6388 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6389 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6390 "\\FSPD", /* 600e/x, 770e, 770x */
6391 ); /* all others */
6392 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6393 "JFNS", /* 770x-JL */
6394 ); /* all others */
6395
6396 /*
6397 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6398 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6399 * be in auto mode (0x80).
6400 *
6401 * This is corrected by any write to HFSP either by the driver, or
6402 * by the firmware.
6403 *
6404 * We assume 0x07 really means auto mode while this quirk is active,
6405 * as this is far more likely than the ThinkPad being in level 7,
6406 * which is only used by the firmware during thermal emergencies.
6407 *
6408 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6409 * TP-70 (T43, R52), which are known to be buggy.
6410 */
6411
6412 static void fan_quirk1_setup(void)
6413 {
6414 if (fan_control_initial_status == 0x07) {
6415 printk(TPACPI_NOTICE
6416 "fan_init: initial fan status is unknown, "
6417 "assuming it is in auto mode\n");
6418 tp_features.fan_ctrl_status_undef = 1;
6419 }
6420 }
6421
6422 static void fan_quirk1_handle(u8 *fan_status)
6423 {
6424 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6425 if (*fan_status != fan_control_initial_status) {
6426 /* something changed the HFSP regisnter since
6427 * driver init time, so it is not undefined
6428 * anymore */
6429 tp_features.fan_ctrl_status_undef = 0;
6430 } else {
6431 /* Return most likely status. In fact, it
6432 * might be the only possible status */
6433 *fan_status = TP_EC_FAN_AUTO;
6434 }
6435 }
6436 }
6437
6438 /* Select main fan on X60/X61, NOOP on others */
6439 static bool fan_select_fan1(void)
6440 {
6441 if (tp_features.second_fan) {
6442 u8 val;
6443
6444 if (ec_read(fan_select_offset, &val) < 0)
6445 return false;
6446 val &= 0xFEU;
6447 if (ec_write(fan_select_offset, val) < 0)
6448 return false;
6449 }
6450 return true;
6451 }
6452
6453 /* Select secondary fan on X60/X61 */
6454 static bool fan_select_fan2(void)
6455 {
6456 u8 val;
6457
6458 if (!tp_features.second_fan)
6459 return false;
6460
6461 if (ec_read(fan_select_offset, &val) < 0)
6462 return false;
6463 val |= 0x01U;
6464 if (ec_write(fan_select_offset, val) < 0)
6465 return false;
6466
6467 return true;
6468 }
6469
6470 /*
6471 * Call with fan_mutex held
6472 */
6473 static void fan_update_desired_level(u8 status)
6474 {
6475 if ((status &
6476 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6477 if (status > 7)
6478 fan_control_desired_level = 7;
6479 else
6480 fan_control_desired_level = status;
6481 }
6482 }
6483
6484 static int fan_get_status(u8 *status)
6485 {
6486 u8 s;
6487
6488 /* TODO:
6489 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6490
6491 switch (fan_status_access_mode) {
6492 case TPACPI_FAN_RD_ACPI_GFAN:
6493 /* 570, 600e/x, 770e, 770x */
6494
6495 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6496 return -EIO;
6497
6498 if (likely(status))
6499 *status = s & 0x07;
6500
6501 break;
6502
6503 case TPACPI_FAN_RD_TPEC:
6504 /* all except 570, 600e/x, 770e, 770x */
6505 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6506 return -EIO;
6507
6508 if (likely(status)) {
6509 *status = s;
6510 fan_quirk1_handle(status);
6511 }
6512
6513 break;
6514
6515 default:
6516 return -ENXIO;
6517 }
6518
6519 return 0;
6520 }
6521
6522 static int fan_get_status_safe(u8 *status)
6523 {
6524 int rc;
6525 u8 s;
6526
6527 if (mutex_lock_killable(&fan_mutex))
6528 return -ERESTARTSYS;
6529 rc = fan_get_status(&s);
6530 if (!rc)
6531 fan_update_desired_level(s);
6532 mutex_unlock(&fan_mutex);
6533
6534 if (status)
6535 *status = s;
6536
6537 return rc;
6538 }
6539
6540 static int fan_get_speed(unsigned int *speed)
6541 {
6542 u8 hi, lo;
6543
6544 switch (fan_status_access_mode) {
6545 case TPACPI_FAN_RD_TPEC:
6546 /* all except 570, 600e/x, 770e, 770x */
6547 if (unlikely(!fan_select_fan1()))
6548 return -EIO;
6549 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6550 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6551 return -EIO;
6552
6553 if (likely(speed))
6554 *speed = (hi << 8) | lo;
6555
6556 break;
6557
6558 default:
6559 return -ENXIO;
6560 }
6561
6562 return 0;
6563 }
6564
6565 static int fan2_get_speed(unsigned int *speed)
6566 {
6567 u8 hi, lo;
6568 bool rc;
6569
6570 switch (fan_status_access_mode) {
6571 case TPACPI_FAN_RD_TPEC:
6572 /* all except 570, 600e/x, 770e, 770x */
6573 if (unlikely(!fan_select_fan2()))
6574 return -EIO;
6575 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6576 !acpi_ec_read(fan_rpm_offset + 1, &hi);
6577 fan_select_fan1(); /* play it safe */
6578 if (rc)
6579 return -EIO;
6580
6581 if (likely(speed))
6582 *speed = (hi << 8) | lo;
6583
6584 break;
6585
6586 default:
6587 return -ENXIO;
6588 }
6589
6590 return 0;
6591 }
6592
6593 static int fan_set_level(int level)
6594 {
6595 if (!fan_control_allowed)
6596 return -EPERM;
6597
6598 switch (fan_control_access_mode) {
6599 case TPACPI_FAN_WR_ACPI_SFAN:
6600 if (level >= 0 && level <= 7) {
6601 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6602 return -EIO;
6603 } else
6604 return -EINVAL;
6605 break;
6606
6607 case TPACPI_FAN_WR_ACPI_FANS:
6608 case TPACPI_FAN_WR_TPEC:
6609 if (!(level & TP_EC_FAN_AUTO) &&
6610 !(level & TP_EC_FAN_FULLSPEED) &&
6611 ((level < 0) || (level > 7)))
6612 return -EINVAL;
6613
6614 /* safety net should the EC not support AUTO
6615 * or FULLSPEED mode bits and just ignore them */
6616 if (level & TP_EC_FAN_FULLSPEED)
6617 level |= 7; /* safety min speed 7 */
6618 else if (level & TP_EC_FAN_AUTO)
6619 level |= 4; /* safety min speed 4 */
6620
6621 if (!acpi_ec_write(fan_status_offset, level))
6622 return -EIO;
6623 else
6624 tp_features.fan_ctrl_status_undef = 0;
6625 break;
6626
6627 default:
6628 return -ENXIO;
6629 }
6630
6631 vdbg_printk(TPACPI_DBG_FAN,
6632 "fan control: set fan control register to 0x%02x\n", level);
6633 return 0;
6634 }
6635
6636 static int fan_set_level_safe(int level)
6637 {
6638 int rc;
6639
6640 if (!fan_control_allowed)
6641 return -EPERM;
6642
6643 if (mutex_lock_killable(&fan_mutex))
6644 return -ERESTARTSYS;
6645
6646 if (level == TPACPI_FAN_LAST_LEVEL)
6647 level = fan_control_desired_level;
6648
6649 rc = fan_set_level(level);
6650 if (!rc)
6651 fan_update_desired_level(level);
6652
6653 mutex_unlock(&fan_mutex);
6654 return rc;
6655 }
6656
6657 static int fan_set_enable(void)
6658 {
6659 u8 s;
6660 int rc;
6661
6662 if (!fan_control_allowed)
6663 return -EPERM;
6664
6665 if (mutex_lock_killable(&fan_mutex))
6666 return -ERESTARTSYS;
6667
6668 switch (fan_control_access_mode) {
6669 case TPACPI_FAN_WR_ACPI_FANS:
6670 case TPACPI_FAN_WR_TPEC:
6671 rc = fan_get_status(&s);
6672 if (rc < 0)
6673 break;
6674
6675 /* Don't go out of emergency fan mode */
6676 if (s != 7) {
6677 s &= 0x07;
6678 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6679 }
6680
6681 if (!acpi_ec_write(fan_status_offset, s))
6682 rc = -EIO;
6683 else {
6684 tp_features.fan_ctrl_status_undef = 0;
6685 rc = 0;
6686 }
6687 break;
6688
6689 case TPACPI_FAN_WR_ACPI_SFAN:
6690 rc = fan_get_status(&s);
6691 if (rc < 0)
6692 break;
6693
6694 s &= 0x07;
6695
6696 /* Set fan to at least level 4 */
6697 s |= 4;
6698
6699 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6700 rc = -EIO;
6701 else
6702 rc = 0;
6703 break;
6704
6705 default:
6706 rc = -ENXIO;
6707 }
6708
6709 mutex_unlock(&fan_mutex);
6710
6711 if (!rc)
6712 vdbg_printk(TPACPI_DBG_FAN,
6713 "fan control: set fan control register to 0x%02x\n",
6714 s);
6715 return rc;
6716 }
6717
6718 static int fan_set_disable(void)
6719 {
6720 int rc;
6721
6722 if (!fan_control_allowed)
6723 return -EPERM;
6724
6725 if (mutex_lock_killable(&fan_mutex))
6726 return -ERESTARTSYS;
6727
6728 rc = 0;
6729 switch (fan_control_access_mode) {
6730 case TPACPI_FAN_WR_ACPI_FANS:
6731 case TPACPI_FAN_WR_TPEC:
6732 if (!acpi_ec_write(fan_status_offset, 0x00))
6733 rc = -EIO;
6734 else {
6735 fan_control_desired_level = 0;
6736 tp_features.fan_ctrl_status_undef = 0;
6737 }
6738 break;
6739
6740 case TPACPI_FAN_WR_ACPI_SFAN:
6741 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6742 rc = -EIO;
6743 else
6744 fan_control_desired_level = 0;
6745 break;
6746
6747 default:
6748 rc = -ENXIO;
6749 }
6750
6751 if (!rc)
6752 vdbg_printk(TPACPI_DBG_FAN,
6753 "fan control: set fan control register to 0\n");
6754
6755 mutex_unlock(&fan_mutex);
6756 return rc;
6757 }
6758
6759 static int fan_set_speed(int speed)
6760 {
6761 int rc;
6762
6763 if (!fan_control_allowed)
6764 return -EPERM;
6765
6766 if (mutex_lock_killable(&fan_mutex))
6767 return -ERESTARTSYS;
6768
6769 rc = 0;
6770 switch (fan_control_access_mode) {
6771 case TPACPI_FAN_WR_ACPI_FANS:
6772 if (speed >= 0 && speed <= 65535) {
6773 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6774 speed, speed, speed))
6775 rc = -EIO;
6776 } else
6777 rc = -EINVAL;
6778 break;
6779
6780 default:
6781 rc = -ENXIO;
6782 }
6783
6784 mutex_unlock(&fan_mutex);
6785 return rc;
6786 }
6787
6788 static void fan_watchdog_reset(void)
6789 {
6790 static int fan_watchdog_active;
6791
6792 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6793 return;
6794
6795 if (fan_watchdog_active)
6796 cancel_delayed_work(&fan_watchdog_task);
6797
6798 if (fan_watchdog_maxinterval > 0 &&
6799 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6800 fan_watchdog_active = 1;
6801 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6802 msecs_to_jiffies(fan_watchdog_maxinterval
6803 * 1000))) {
6804 printk(TPACPI_ERR
6805 "failed to queue the fan watchdog, "
6806 "watchdog will not trigger\n");
6807 }
6808 } else
6809 fan_watchdog_active = 0;
6810 }
6811
6812 static void fan_watchdog_fire(struct work_struct *ignored)
6813 {
6814 int rc;
6815
6816 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6817 return;
6818
6819 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6820 rc = fan_set_enable();
6821 if (rc < 0) {
6822 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6823 "will try again later...\n", -rc);
6824 /* reschedule for later */
6825 fan_watchdog_reset();
6826 }
6827 }
6828
6829 /*
6830 * SYSFS fan layout: hwmon compatible (device)
6831 *
6832 * pwm*_enable:
6833 * 0: "disengaged" mode
6834 * 1: manual mode
6835 * 2: native EC "auto" mode (recommended, hardware default)
6836 *
6837 * pwm*: set speed in manual mode, ignored otherwise.
6838 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6839 * interpolation.
6840 *
6841 * fan*_input: tachometer reading, RPM
6842 *
6843 *
6844 * SYSFS fan layout: extensions
6845 *
6846 * fan_watchdog (driver):
6847 * fan watchdog interval in seconds, 0 disables (default), max 120
6848 */
6849
6850 /* sysfs fan pwm1_enable ----------------------------------------------- */
6851 static ssize_t fan_pwm1_enable_show(struct device *dev,
6852 struct device_attribute *attr,
6853 char *buf)
6854 {
6855 int res, mode;
6856 u8 status;
6857
6858 res = fan_get_status_safe(&status);
6859 if (res)
6860 return res;
6861
6862 if (status & TP_EC_FAN_FULLSPEED) {
6863 mode = 0;
6864 } else if (status & TP_EC_FAN_AUTO) {
6865 mode = 2;
6866 } else
6867 mode = 1;
6868
6869 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6870 }
6871
6872 static ssize_t fan_pwm1_enable_store(struct device *dev,
6873 struct device_attribute *attr,
6874 const char *buf, size_t count)
6875 {
6876 unsigned long t;
6877 int res, level;
6878
6879 if (parse_strtoul(buf, 2, &t))
6880 return -EINVAL;
6881
6882 tpacpi_disclose_usertask("hwmon pwm1_enable",
6883 "set fan mode to %lu\n", t);
6884
6885 switch (t) {
6886 case 0:
6887 level = TP_EC_FAN_FULLSPEED;
6888 break;
6889 case 1:
6890 level = TPACPI_FAN_LAST_LEVEL;
6891 break;
6892 case 2:
6893 level = TP_EC_FAN_AUTO;
6894 break;
6895 case 3:
6896 /* reserved for software-controlled auto mode */
6897 return -ENOSYS;
6898 default:
6899 return -EINVAL;
6900 }
6901
6902 res = fan_set_level_safe(level);
6903 if (res == -ENXIO)
6904 return -EINVAL;
6905 else if (res < 0)
6906 return res;
6907
6908 fan_watchdog_reset();
6909
6910 return count;
6911 }
6912
6913 static struct device_attribute dev_attr_fan_pwm1_enable =
6914 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6915 fan_pwm1_enable_show, fan_pwm1_enable_store);
6916
6917 /* sysfs fan pwm1 ------------------------------------------------------ */
6918 static ssize_t fan_pwm1_show(struct device *dev,
6919 struct device_attribute *attr,
6920 char *buf)
6921 {
6922 int res;
6923 u8 status;
6924
6925 res = fan_get_status_safe(&status);
6926 if (res)
6927 return res;
6928
6929 if ((status &
6930 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6931 status = fan_control_desired_level;
6932
6933 if (status > 7)
6934 status = 7;
6935
6936 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6937 }
6938
6939 static ssize_t fan_pwm1_store(struct device *dev,
6940 struct device_attribute *attr,
6941 const char *buf, size_t count)
6942 {
6943 unsigned long s;
6944 int rc;
6945 u8 status, newlevel;
6946
6947 if (parse_strtoul(buf, 255, &s))
6948 return -EINVAL;
6949
6950 tpacpi_disclose_usertask("hwmon pwm1",
6951 "set fan speed to %lu\n", s);
6952
6953 /* scale down from 0-255 to 0-7 */
6954 newlevel = (s >> 5) & 0x07;
6955
6956 if (mutex_lock_killable(&fan_mutex))
6957 return -ERESTARTSYS;
6958
6959 rc = fan_get_status(&status);
6960 if (!rc && (status &
6961 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6962 rc = fan_set_level(newlevel);
6963 if (rc == -ENXIO)
6964 rc = -EINVAL;
6965 else if (!rc) {
6966 fan_update_desired_level(newlevel);
6967 fan_watchdog_reset();
6968 }
6969 }
6970
6971 mutex_unlock(&fan_mutex);
6972 return (rc)? rc : count;
6973 }
6974
6975 static struct device_attribute dev_attr_fan_pwm1 =
6976 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6977 fan_pwm1_show, fan_pwm1_store);
6978
6979 /* sysfs fan fan1_input ------------------------------------------------ */
6980 static ssize_t fan_fan1_input_show(struct device *dev,
6981 struct device_attribute *attr,
6982 char *buf)
6983 {
6984 int res;
6985 unsigned int speed;
6986
6987 res = fan_get_speed(&speed);
6988 if (res < 0)
6989 return res;
6990
6991 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6992 }
6993
6994 static struct device_attribute dev_attr_fan_fan1_input =
6995 __ATTR(fan1_input, S_IRUGO,
6996 fan_fan1_input_show, NULL);
6997
6998 /* sysfs fan fan2_input ------------------------------------------------ */
6999 static ssize_t fan_fan2_input_show(struct device *dev,
7000 struct device_attribute *attr,
7001 char *buf)
7002 {
7003 int res;
7004 unsigned int speed;
7005
7006 res = fan2_get_speed(&speed);
7007 if (res < 0)
7008 return res;
7009
7010 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7011 }
7012
7013 static struct device_attribute dev_attr_fan_fan2_input =
7014 __ATTR(fan2_input, S_IRUGO,
7015 fan_fan2_input_show, NULL);
7016
7017 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7018 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7019 char *buf)
7020 {
7021 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7022 }
7023
7024 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7025 const char *buf, size_t count)
7026 {
7027 unsigned long t;
7028
7029 if (parse_strtoul(buf, 120, &t))
7030 return -EINVAL;
7031
7032 if (!fan_control_allowed)
7033 return -EPERM;
7034
7035 fan_watchdog_maxinterval = t;
7036 fan_watchdog_reset();
7037
7038 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7039
7040 return count;
7041 }
7042
7043 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7044 fan_fan_watchdog_show, fan_fan_watchdog_store);
7045
7046 /* --------------------------------------------------------------------- */
7047 static struct attribute *fan_attributes[] = {
7048 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7049 &dev_attr_fan_fan1_input.attr,
7050 NULL, /* for fan2_input */
7051 NULL
7052 };
7053
7054 static const struct attribute_group fan_attr_group = {
7055 .attrs = fan_attributes,
7056 };
7057
7058 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7059 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7060
7061 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7062 { .vendor = PCI_VENDOR_ID_IBM, \
7063 .bios = TPACPI_MATCH_ANY, \
7064 .ec = TPID(__id1, __id2), \
7065 .quirks = __quirks }
7066
7067 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7068 { .vendor = PCI_VENDOR_ID_LENOVO, \
7069 .bios = TPACPI_MATCH_ANY, \
7070 .ec = TPID(__id1, __id2), \
7071 .quirks = __quirks }
7072
7073 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7074 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7075 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7076 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7077 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7078 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7079 };
7080
7081 #undef TPACPI_FAN_QL
7082 #undef TPACPI_FAN_QI
7083
7084 static int __init fan_init(struct ibm_init_struct *iibm)
7085 {
7086 int rc;
7087 unsigned long quirks;
7088
7089 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7090 "initializing fan subdriver\n");
7091
7092 mutex_init(&fan_mutex);
7093 fan_status_access_mode = TPACPI_FAN_NONE;
7094 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7095 fan_control_commands = 0;
7096 fan_watchdog_maxinterval = 0;
7097 tp_features.fan_ctrl_status_undef = 0;
7098 tp_features.second_fan = 0;
7099 fan_control_desired_level = 7;
7100
7101 TPACPI_ACPIHANDLE_INIT(fans);
7102 TPACPI_ACPIHANDLE_INIT(gfan);
7103 TPACPI_ACPIHANDLE_INIT(sfan);
7104
7105 quirks = tpacpi_check_quirks(fan_quirk_table,
7106 ARRAY_SIZE(fan_quirk_table));
7107
7108 if (gfan_handle) {
7109 /* 570, 600e/x, 770e, 770x */
7110 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7111 } else {
7112 /* all other ThinkPads: note that even old-style
7113 * ThinkPad ECs supports the fan control register */
7114 if (likely(acpi_ec_read(fan_status_offset,
7115 &fan_control_initial_status))) {
7116 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7117 if (quirks & TPACPI_FAN_Q1)
7118 fan_quirk1_setup();
7119 if (quirks & TPACPI_FAN_2FAN) {
7120 tp_features.second_fan = 1;
7121 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7122 "secondary fan support enabled\n");
7123 }
7124 } else {
7125 printk(TPACPI_ERR
7126 "ThinkPad ACPI EC access misbehaving, "
7127 "fan status and control unavailable\n");
7128 return 1;
7129 }
7130 }
7131
7132 if (sfan_handle) {
7133 /* 570, 770x-JL */
7134 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7135 fan_control_commands |=
7136 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7137 } else {
7138 if (!gfan_handle) {
7139 /* gfan without sfan means no fan control */
7140 /* all other models implement TP EC 0x2f control */
7141
7142 if (fans_handle) {
7143 /* X31, X40, X41 */
7144 fan_control_access_mode =
7145 TPACPI_FAN_WR_ACPI_FANS;
7146 fan_control_commands |=
7147 TPACPI_FAN_CMD_SPEED |
7148 TPACPI_FAN_CMD_LEVEL |
7149 TPACPI_FAN_CMD_ENABLE;
7150 } else {
7151 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7152 fan_control_commands |=
7153 TPACPI_FAN_CMD_LEVEL |
7154 TPACPI_FAN_CMD_ENABLE;
7155 }
7156 }
7157 }
7158
7159 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7160 "fan is %s, modes %d, %d\n",
7161 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7162 fan_control_access_mode != TPACPI_FAN_WR_NONE),
7163 fan_status_access_mode, fan_control_access_mode);
7164
7165 /* fan control master switch */
7166 if (!fan_control_allowed) {
7167 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7168 fan_control_commands = 0;
7169 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7170 "fan control features disabled by parameter\n");
7171 }
7172
7173 /* update fan_control_desired_level */
7174 if (fan_status_access_mode != TPACPI_FAN_NONE)
7175 fan_get_status_safe(NULL);
7176
7177 if (fan_status_access_mode != TPACPI_FAN_NONE ||
7178 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7179 if (tp_features.second_fan) {
7180 /* attach second fan tachometer */
7181 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7182 &dev_attr_fan_fan2_input.attr;
7183 }
7184 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7185 &fan_attr_group);
7186 if (rc < 0)
7187 return rc;
7188
7189 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7190 &driver_attr_fan_watchdog);
7191 if (rc < 0) {
7192 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7193 &fan_attr_group);
7194 return rc;
7195 }
7196 return 0;
7197 } else
7198 return 1;
7199 }
7200
7201 static void fan_exit(void)
7202 {
7203 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7204 "cancelling any pending fan watchdog tasks\n");
7205
7206 /* FIXME: can we really do this unconditionally? */
7207 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7208 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7209 &driver_attr_fan_watchdog);
7210
7211 cancel_delayed_work(&fan_watchdog_task);
7212 flush_workqueue(tpacpi_wq);
7213 }
7214
7215 static void fan_suspend(pm_message_t state)
7216 {
7217 int rc;
7218
7219 if (!fan_control_allowed)
7220 return;
7221
7222 /* Store fan status in cache */
7223 fan_control_resume_level = 0;
7224 rc = fan_get_status_safe(&fan_control_resume_level);
7225 if (rc < 0)
7226 printk(TPACPI_NOTICE
7227 "failed to read fan level for later "
7228 "restore during resume: %d\n", rc);
7229
7230 /* if it is undefined, don't attempt to restore it.
7231 * KEEP THIS LAST */
7232 if (tp_features.fan_ctrl_status_undef)
7233 fan_control_resume_level = 0;
7234 }
7235
7236 static void fan_resume(void)
7237 {
7238 u8 current_level = 7;
7239 bool do_set = false;
7240 int rc;
7241
7242 /* DSDT *always* updates status on resume */
7243 tp_features.fan_ctrl_status_undef = 0;
7244
7245 if (!fan_control_allowed ||
7246 !fan_control_resume_level ||
7247 (fan_get_status_safe(&current_level) < 0))
7248 return;
7249
7250 switch (fan_control_access_mode) {
7251 case TPACPI_FAN_WR_ACPI_SFAN:
7252 /* never decrease fan level */
7253 do_set = (fan_control_resume_level > current_level);
7254 break;
7255 case TPACPI_FAN_WR_ACPI_FANS:
7256 case TPACPI_FAN_WR_TPEC:
7257 /* never decrease fan level, scale is:
7258 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7259 *
7260 * We expect the firmware to set either 7 or AUTO, but we
7261 * handle FULLSPEED out of paranoia.
7262 *
7263 * So, we can safely only restore FULLSPEED or 7, anything
7264 * else could slow the fan. Restoring AUTO is useless, at
7265 * best that's exactly what the DSDT already set (it is the
7266 * slower it uses).
7267 *
7268 * Always keep in mind that the DSDT *will* have set the
7269 * fans to what the vendor supposes is the best level. We
7270 * muck with it only to speed the fan up.
7271 */
7272 if (fan_control_resume_level != 7 &&
7273 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7274 return;
7275 else
7276 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7277 (current_level != fan_control_resume_level);
7278 break;
7279 default:
7280 return;
7281 }
7282 if (do_set) {
7283 printk(TPACPI_NOTICE
7284 "restoring fan level to 0x%02x\n",
7285 fan_control_resume_level);
7286 rc = fan_set_level_safe(fan_control_resume_level);
7287 if (rc < 0)
7288 printk(TPACPI_NOTICE
7289 "failed to restore fan level: %d\n", rc);
7290 }
7291 }
7292
7293 static int fan_read(char *p)
7294 {
7295 int len = 0;
7296 int rc;
7297 u8 status;
7298 unsigned int speed = 0;
7299
7300 switch (fan_status_access_mode) {
7301 case TPACPI_FAN_RD_ACPI_GFAN:
7302 /* 570, 600e/x, 770e, 770x */
7303 rc = fan_get_status_safe(&status);
7304 if (rc < 0)
7305 return rc;
7306
7307 len += sprintf(p + len, "status:\t\t%s\n"
7308 "level:\t\t%d\n",
7309 (status != 0) ? "enabled" : "disabled", status);
7310 break;
7311
7312 case TPACPI_FAN_RD_TPEC:
7313 /* all except 570, 600e/x, 770e, 770x */
7314 rc = fan_get_status_safe(&status);
7315 if (rc < 0)
7316 return rc;
7317
7318 len += sprintf(p + len, "status:\t\t%s\n",
7319 (status != 0) ? "enabled" : "disabled");
7320
7321 rc = fan_get_speed(&speed);
7322 if (rc < 0)
7323 return rc;
7324
7325 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7326
7327 if (status & TP_EC_FAN_FULLSPEED)
7328 /* Disengaged mode takes precedence */
7329 len += sprintf(p + len, "level:\t\tdisengaged\n");
7330 else if (status & TP_EC_FAN_AUTO)
7331 len += sprintf(p + len, "level:\t\tauto\n");
7332 else
7333 len += sprintf(p + len, "level:\t\t%d\n", status);
7334 break;
7335
7336 case TPACPI_FAN_NONE:
7337 default:
7338 len += sprintf(p + len, "status:\t\tnot supported\n");
7339 }
7340
7341 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7342 len += sprintf(p + len, "commands:\tlevel <level>");
7343
7344 switch (fan_control_access_mode) {
7345 case TPACPI_FAN_WR_ACPI_SFAN:
7346 len += sprintf(p + len, " (<level> is 0-7)\n");
7347 break;
7348
7349 default:
7350 len += sprintf(p + len, " (<level> is 0-7, "
7351 "auto, disengaged, full-speed)\n");
7352 break;
7353 }
7354 }
7355
7356 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7357 len += sprintf(p + len, "commands:\tenable, disable\n"
7358 "commands:\twatchdog <timeout> (<timeout> "
7359 "is 0 (off), 1-120 (seconds))\n");
7360
7361 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7362 len += sprintf(p + len, "commands:\tspeed <speed>"
7363 " (<speed> is 0-65535)\n");
7364
7365 return len;
7366 }
7367
7368 static int fan_write_cmd_level(const char *cmd, int *rc)
7369 {
7370 int level;
7371
7372 if (strlencmp(cmd, "level auto") == 0)
7373 level = TP_EC_FAN_AUTO;
7374 else if ((strlencmp(cmd, "level disengaged") == 0) |
7375 (strlencmp(cmd, "level full-speed") == 0))
7376 level = TP_EC_FAN_FULLSPEED;
7377 else if (sscanf(cmd, "level %d", &level) != 1)
7378 return 0;
7379
7380 *rc = fan_set_level_safe(level);
7381 if (*rc == -ENXIO)
7382 printk(TPACPI_ERR "level command accepted for unsupported "
7383 "access mode %d", fan_control_access_mode);
7384 else if (!*rc)
7385 tpacpi_disclose_usertask("procfs fan",
7386 "set level to %d\n", level);
7387
7388 return 1;
7389 }
7390
7391 static int fan_write_cmd_enable(const char *cmd, int *rc)
7392 {
7393 if (strlencmp(cmd, "enable") != 0)
7394 return 0;
7395
7396 *rc = fan_set_enable();
7397 if (*rc == -ENXIO)
7398 printk(TPACPI_ERR "enable command accepted for unsupported "
7399 "access mode %d", fan_control_access_mode);
7400 else if (!*rc)
7401 tpacpi_disclose_usertask("procfs fan", "enable\n");
7402
7403 return 1;
7404 }
7405
7406 static int fan_write_cmd_disable(const char *cmd, int *rc)
7407 {
7408 if (strlencmp(cmd, "disable") != 0)
7409 return 0;
7410
7411 *rc = fan_set_disable();
7412 if (*rc == -ENXIO)
7413 printk(TPACPI_ERR "disable command accepted for unsupported "
7414 "access mode %d", fan_control_access_mode);
7415 else if (!*rc)
7416 tpacpi_disclose_usertask("procfs fan", "disable\n");
7417
7418 return 1;
7419 }
7420
7421 static int fan_write_cmd_speed(const char *cmd, int *rc)
7422 {
7423 int speed;
7424
7425 /* TODO:
7426 * Support speed <low> <medium> <high> ? */
7427
7428 if (sscanf(cmd, "speed %d", &speed) != 1)
7429 return 0;
7430
7431 *rc = fan_set_speed(speed);
7432 if (*rc == -ENXIO)
7433 printk(TPACPI_ERR "speed command accepted for unsupported "
7434 "access mode %d", fan_control_access_mode);
7435 else if (!*rc)
7436 tpacpi_disclose_usertask("procfs fan",
7437 "set speed to %d\n", speed);
7438
7439 return 1;
7440 }
7441
7442 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7443 {
7444 int interval;
7445
7446 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7447 return 0;
7448
7449 if (interval < 0 || interval > 120)
7450 *rc = -EINVAL;
7451 else {
7452 fan_watchdog_maxinterval = interval;
7453 tpacpi_disclose_usertask("procfs fan",
7454 "set watchdog timer to %d\n",
7455 interval);
7456 }
7457
7458 return 1;
7459 }
7460
7461 static int fan_write(char *buf)
7462 {
7463 char *cmd;
7464 int rc = 0;
7465
7466 while (!rc && (cmd = next_cmd(&buf))) {
7467 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7468 fan_write_cmd_level(cmd, &rc)) &&
7469 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7470 (fan_write_cmd_enable(cmd, &rc) ||
7471 fan_write_cmd_disable(cmd, &rc) ||
7472 fan_write_cmd_watchdog(cmd, &rc))) &&
7473 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7474 fan_write_cmd_speed(cmd, &rc))
7475 )
7476 rc = -EINVAL;
7477 else if (!rc)
7478 fan_watchdog_reset();
7479 }
7480
7481 return rc;
7482 }
7483
7484 static struct ibm_struct fan_driver_data = {
7485 .name = "fan",
7486 .read = fan_read,
7487 .write = fan_write,
7488 .exit = fan_exit,
7489 .suspend = fan_suspend,
7490 .resume = fan_resume,
7491 };
7492
7493 /****************************************************************************
7494 ****************************************************************************
7495 *
7496 * Infrastructure
7497 *
7498 ****************************************************************************
7499 ****************************************************************************/
7500
7501 /* sysfs name ---------------------------------------------------------- */
7502 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7503 struct device_attribute *attr,
7504 char *buf)
7505 {
7506 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7507 }
7508
7509 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7510 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7511
7512 /* --------------------------------------------------------------------- */
7513
7514 /* /proc support */
7515 static struct proc_dir_entry *proc_dir;
7516
7517 /*
7518 * Module and infrastructure proble, init and exit handling
7519 */
7520
7521 static int force_load;
7522
7523 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7524 static const char * __init str_supported(int is_supported)
7525 {
7526 static char text_unsupported[] __initdata = "not supported";
7527
7528 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7529 }
7530 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7531
7532 static void ibm_exit(struct ibm_struct *ibm)
7533 {
7534 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7535
7536 list_del_init(&ibm->all_drivers);
7537
7538 if (ibm->flags.acpi_notify_installed) {
7539 dbg_printk(TPACPI_DBG_EXIT,
7540 "%s: acpi_remove_notify_handler\n", ibm->name);
7541 BUG_ON(!ibm->acpi);
7542 acpi_remove_notify_handler(*ibm->acpi->handle,
7543 ibm->acpi->type,
7544 dispatch_acpi_notify);
7545 ibm->flags.acpi_notify_installed = 0;
7546 ibm->flags.acpi_notify_installed = 0;
7547 }
7548
7549 if (ibm->flags.proc_created) {
7550 dbg_printk(TPACPI_DBG_EXIT,
7551 "%s: remove_proc_entry\n", ibm->name);
7552 remove_proc_entry(ibm->name, proc_dir);
7553 ibm->flags.proc_created = 0;
7554 }
7555
7556 if (ibm->flags.acpi_driver_registered) {
7557 dbg_printk(TPACPI_DBG_EXIT,
7558 "%s: acpi_bus_unregister_driver\n", ibm->name);
7559 BUG_ON(!ibm->acpi);
7560 acpi_bus_unregister_driver(ibm->acpi->driver);
7561 kfree(ibm->acpi->driver);
7562 ibm->acpi->driver = NULL;
7563 ibm->flags.acpi_driver_registered = 0;
7564 }
7565
7566 if (ibm->flags.init_called && ibm->exit) {
7567 ibm->exit();
7568 ibm->flags.init_called = 0;
7569 }
7570
7571 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7572 }
7573
7574 static int __init ibm_init(struct ibm_init_struct *iibm)
7575 {
7576 int ret;
7577 struct ibm_struct *ibm = iibm->data;
7578 struct proc_dir_entry *entry;
7579
7580 BUG_ON(ibm == NULL);
7581
7582 INIT_LIST_HEAD(&ibm->all_drivers);
7583
7584 if (ibm->flags.experimental && !experimental)
7585 return 0;
7586
7587 dbg_printk(TPACPI_DBG_INIT,
7588 "probing for %s\n", ibm->name);
7589
7590 if (iibm->init) {
7591 ret = iibm->init(iibm);
7592 if (ret > 0)
7593 return 0; /* probe failed */
7594 if (ret)
7595 return ret;
7596
7597 ibm->flags.init_called = 1;
7598 }
7599
7600 if (ibm->acpi) {
7601 if (ibm->acpi->hid) {
7602 ret = register_tpacpi_subdriver(ibm);
7603 if (ret)
7604 goto err_out;
7605 }
7606
7607 if (ibm->acpi->notify) {
7608 ret = setup_acpi_notify(ibm);
7609 if (ret == -ENODEV) {
7610 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7611 ibm->name);
7612 ret = 0;
7613 goto err_out;
7614 }
7615 if (ret < 0)
7616 goto err_out;
7617 }
7618 }
7619
7620 dbg_printk(TPACPI_DBG_INIT,
7621 "%s installed\n", ibm->name);
7622
7623 if (ibm->read) {
7624 entry = create_proc_entry(ibm->name,
7625 S_IFREG | S_IRUGO | S_IWUSR,
7626 proc_dir);
7627 if (!entry) {
7628 printk(TPACPI_ERR "unable to create proc entry %s\n",
7629 ibm->name);
7630 ret = -ENODEV;
7631 goto err_out;
7632 }
7633 entry->data = ibm;
7634 entry->read_proc = &dispatch_procfs_read;
7635 if (ibm->write)
7636 entry->write_proc = &dispatch_procfs_write;
7637 ibm->flags.proc_created = 1;
7638 }
7639
7640 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7641
7642 return 0;
7643
7644 err_out:
7645 dbg_printk(TPACPI_DBG_INIT,
7646 "%s: at error exit path with result %d\n",
7647 ibm->name, ret);
7648
7649 ibm_exit(ibm);
7650 return (ret < 0)? ret : 0;
7651 }
7652
7653 /* Probing */
7654
7655 static bool __pure __init tpacpi_is_fw_digit(const char c)
7656 {
7657 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7658 }
7659
7660 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7661 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7662 const char t)
7663 {
7664 return s && strlen(s) >= 8 &&
7665 tpacpi_is_fw_digit(s[0]) &&
7666 tpacpi_is_fw_digit(s[1]) &&
7667 s[2] == t && s[3] == 'T' &&
7668 tpacpi_is_fw_digit(s[4]) &&
7669 tpacpi_is_fw_digit(s[5]) &&
7670 s[6] == 'W' && s[7] == 'W';
7671 }
7672
7673 /* returns 0 - probe ok, or < 0 - probe error.
7674 * Probe ok doesn't mean thinkpad found.
7675 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7676 static int __must_check __init get_thinkpad_model_data(
7677 struct thinkpad_id_data *tp)
7678 {
7679 const struct dmi_device *dev = NULL;
7680 char ec_fw_string[18];
7681 char const *s;
7682
7683 if (!tp)
7684 return -EINVAL;
7685
7686 memset(tp, 0, sizeof(*tp));
7687
7688 if (dmi_name_in_vendors("IBM"))
7689 tp->vendor = PCI_VENDOR_ID_IBM;
7690 else if (dmi_name_in_vendors("LENOVO"))
7691 tp->vendor = PCI_VENDOR_ID_LENOVO;
7692 else
7693 return 0;
7694
7695 s = dmi_get_system_info(DMI_BIOS_VERSION);
7696 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7697 if (s && !tp->bios_version_str)
7698 return -ENOMEM;
7699
7700 /* Really ancient ThinkPad 240X will fail this, which is fine */
7701 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7702 return 0;
7703
7704 tp->bios_model = tp->bios_version_str[0]
7705 | (tp->bios_version_str[1] << 8);
7706 tp->bios_release = (tp->bios_version_str[4] << 8)
7707 | tp->bios_version_str[5];
7708
7709 /*
7710 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7711 * X32 or newer, all Z series; Some models must have an
7712 * up-to-date BIOS or they will not be detected.
7713 *
7714 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7715 */
7716 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7717 if (sscanf(dev->name,
7718 "IBM ThinkPad Embedded Controller -[%17c",
7719 ec_fw_string) == 1) {
7720 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7721 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7722
7723 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7724 if (!tp->ec_version_str)
7725 return -ENOMEM;
7726
7727 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7728 tp->ec_model = ec_fw_string[0]
7729 | (ec_fw_string[1] << 8);
7730 tp->ec_release = (ec_fw_string[4] << 8)
7731 | ec_fw_string[5];
7732 } else {
7733 printk(TPACPI_NOTICE
7734 "ThinkPad firmware release %s "
7735 "doesn't match the known patterns\n",
7736 ec_fw_string);
7737 printk(TPACPI_NOTICE
7738 "please report this to %s\n",
7739 TPACPI_MAIL);
7740 }
7741 break;
7742 }
7743 }
7744
7745 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7746 if (s && !strnicmp(s, "ThinkPad", 8)) {
7747 tp->model_str = kstrdup(s, GFP_KERNEL);
7748 if (!tp->model_str)
7749 return -ENOMEM;
7750 }
7751
7752 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7753 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7754 if (s && !tp->nummodel_str)
7755 return -ENOMEM;
7756
7757 return 0;
7758 }
7759
7760 static int __init probe_for_thinkpad(void)
7761 {
7762 int is_thinkpad;
7763
7764 if (acpi_disabled)
7765 return -ENODEV;
7766
7767 /*
7768 * Non-ancient models have better DMI tagging, but very old models
7769 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
7770 */
7771 is_thinkpad = (thinkpad_id.model_str != NULL) ||
7772 (thinkpad_id.ec_model != 0) ||
7773 tpacpi_is_fw_known();
7774
7775 /* ec is required because many other handles are relative to it */
7776 TPACPI_ACPIHANDLE_INIT(ec);
7777 if (!ec_handle) {
7778 if (is_thinkpad)
7779 printk(TPACPI_ERR
7780 "Not yet supported ThinkPad detected!\n");
7781 return -ENODEV;
7782 }
7783
7784 if (!is_thinkpad && !force_load)
7785 return -ENODEV;
7786
7787 return 0;
7788 }
7789
7790
7791 /* Module init, exit, parameters */
7792
7793 static struct ibm_init_struct ibms_init[] __initdata = {
7794 {
7795 .init = thinkpad_acpi_driver_init,
7796 .data = &thinkpad_acpi_driver_data,
7797 },
7798 {
7799 .init = hotkey_init,
7800 .data = &hotkey_driver_data,
7801 },
7802 {
7803 .init = bluetooth_init,
7804 .data = &bluetooth_driver_data,
7805 },
7806 {
7807 .init = wan_init,
7808 .data = &wan_driver_data,
7809 },
7810 {
7811 .init = uwb_init,
7812 .data = &uwb_driver_data,
7813 },
7814 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7815 {
7816 .init = video_init,
7817 .data = &video_driver_data,
7818 },
7819 #endif
7820 {
7821 .init = light_init,
7822 .data = &light_driver_data,
7823 },
7824 {
7825 .init = cmos_init,
7826 .data = &cmos_driver_data,
7827 },
7828 {
7829 .init = led_init,
7830 .data = &led_driver_data,
7831 },
7832 {
7833 .init = beep_init,
7834 .data = &beep_driver_data,
7835 },
7836 {
7837 .init = thermal_init,
7838 .data = &thermal_driver_data,
7839 },
7840 {
7841 .data = &ecdump_driver_data,
7842 },
7843 {
7844 .init = brightness_init,
7845 .data = &brightness_driver_data,
7846 },
7847 {
7848 .data = &volume_driver_data,
7849 },
7850 {
7851 .init = fan_init,
7852 .data = &fan_driver_data,
7853 },
7854 };
7855
7856 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7857 {
7858 unsigned int i;
7859 struct ibm_struct *ibm;
7860
7861 if (!kp || !kp->name || !val)
7862 return -EINVAL;
7863
7864 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7865 ibm = ibms_init[i].data;
7866 WARN_ON(ibm == NULL);
7867
7868 if (!ibm || !ibm->name)
7869 continue;
7870
7871 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7872 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7873 return -ENOSPC;
7874 strcpy(ibms_init[i].param, val);
7875 strcat(ibms_init[i].param, ",");
7876 return 0;
7877 }
7878 }
7879
7880 return -EINVAL;
7881 }
7882
7883 module_param(experimental, int, 0);
7884 MODULE_PARM_DESC(experimental,
7885 "Enables experimental features when non-zero");
7886
7887 module_param_named(debug, dbg_level, uint, 0);
7888 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7889
7890 module_param(force_load, bool, 0);
7891 MODULE_PARM_DESC(force_load,
7892 "Attempts to load the driver even on a "
7893 "mis-identified ThinkPad when true");
7894
7895 module_param_named(fan_control, fan_control_allowed, bool, 0);
7896 MODULE_PARM_DESC(fan_control,
7897 "Enables setting fan parameters features when true");
7898
7899 module_param_named(brightness_mode, brightness_mode, uint, 0);
7900 MODULE_PARM_DESC(brightness_mode,
7901 "Selects brightness control strategy: "
7902 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7903
7904 module_param(brightness_enable, uint, 0);
7905 MODULE_PARM_DESC(brightness_enable,
7906 "Enables backlight control when 1, disables when 0");
7907
7908 module_param(hotkey_report_mode, uint, 0);
7909 MODULE_PARM_DESC(hotkey_report_mode,
7910 "used for backwards compatibility with userspace, "
7911 "see documentation");
7912
7913 #define TPACPI_PARAM(feature) \
7914 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7915 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7916 "at module load, see documentation")
7917
7918 TPACPI_PARAM(hotkey);
7919 TPACPI_PARAM(bluetooth);
7920 TPACPI_PARAM(video);
7921 TPACPI_PARAM(light);
7922 TPACPI_PARAM(cmos);
7923 TPACPI_PARAM(led);
7924 TPACPI_PARAM(beep);
7925 TPACPI_PARAM(ecdump);
7926 TPACPI_PARAM(brightness);
7927 TPACPI_PARAM(volume);
7928 TPACPI_PARAM(fan);
7929
7930 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7931 module_param(dbg_wlswemul, uint, 0);
7932 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7933 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7934 MODULE_PARM_DESC(wlsw_state,
7935 "Initial state of the emulated WLSW switch");
7936
7937 module_param(dbg_bluetoothemul, uint, 0);
7938 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7939 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7940 MODULE_PARM_DESC(bluetooth_state,
7941 "Initial state of the emulated bluetooth switch");
7942
7943 module_param(dbg_wwanemul, uint, 0);
7944 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7945 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7946 MODULE_PARM_DESC(wwan_state,
7947 "Initial state of the emulated WWAN switch");
7948
7949 module_param(dbg_uwbemul, uint, 0);
7950 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7951 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7952 MODULE_PARM_DESC(uwb_state,
7953 "Initial state of the emulated UWB switch");
7954 #endif
7955
7956 static void thinkpad_acpi_module_exit(void)
7957 {
7958 struct ibm_struct *ibm, *itmp;
7959
7960 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7961
7962 list_for_each_entry_safe_reverse(ibm, itmp,
7963 &tpacpi_all_drivers,
7964 all_drivers) {
7965 ibm_exit(ibm);
7966 }
7967
7968 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7969
7970 if (tpacpi_inputdev) {
7971 if (tp_features.input_device_registered)
7972 input_unregister_device(tpacpi_inputdev);
7973 else
7974 input_free_device(tpacpi_inputdev);
7975 }
7976
7977 if (tpacpi_hwmon)
7978 hwmon_device_unregister(tpacpi_hwmon);
7979
7980 if (tp_features.sensors_pdev_attrs_registered)
7981 device_remove_file(&tpacpi_sensors_pdev->dev,
7982 &dev_attr_thinkpad_acpi_pdev_name);
7983 if (tpacpi_sensors_pdev)
7984 platform_device_unregister(tpacpi_sensors_pdev);
7985 if (tpacpi_pdev)
7986 platform_device_unregister(tpacpi_pdev);
7987
7988 if (tp_features.sensors_pdrv_attrs_registered)
7989 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7990 if (tp_features.platform_drv_attrs_registered)
7991 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7992
7993 if (tp_features.sensors_pdrv_registered)
7994 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7995
7996 if (tp_features.platform_drv_registered)
7997 platform_driver_unregister(&tpacpi_pdriver);
7998
7999 if (proc_dir)
8000 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8001
8002 if (tpacpi_wq)
8003 destroy_workqueue(tpacpi_wq);
8004
8005 kfree(thinkpad_id.bios_version_str);
8006 kfree(thinkpad_id.ec_version_str);
8007 kfree(thinkpad_id.model_str);
8008 }
8009
8010
8011 static int __init thinkpad_acpi_module_init(void)
8012 {
8013 int ret, i;
8014
8015 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8016
8017 /* Parameter checking */
8018 if (hotkey_report_mode > 2)
8019 return -EINVAL;
8020
8021 /* Driver-level probe */
8022
8023 ret = get_thinkpad_model_data(&thinkpad_id);
8024 if (ret) {
8025 printk(TPACPI_ERR
8026 "unable to get DMI data: %d\n", ret);
8027 thinkpad_acpi_module_exit();
8028 return ret;
8029 }
8030 ret = probe_for_thinkpad();
8031 if (ret) {
8032 thinkpad_acpi_module_exit();
8033 return ret;
8034 }
8035
8036 /* Driver initialization */
8037
8038 TPACPI_ACPIHANDLE_INIT(ecrd);
8039 TPACPI_ACPIHANDLE_INIT(ecwr);
8040
8041 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8042 if (!tpacpi_wq) {
8043 thinkpad_acpi_module_exit();
8044 return -ENOMEM;
8045 }
8046
8047 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8048 if (!proc_dir) {
8049 printk(TPACPI_ERR
8050 "unable to create proc dir " TPACPI_PROC_DIR);
8051 thinkpad_acpi_module_exit();
8052 return -ENODEV;
8053 }
8054
8055 ret = platform_driver_register(&tpacpi_pdriver);
8056 if (ret) {
8057 printk(TPACPI_ERR
8058 "unable to register main platform driver\n");
8059 thinkpad_acpi_module_exit();
8060 return ret;
8061 }
8062 tp_features.platform_drv_registered = 1;
8063
8064 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8065 if (ret) {
8066 printk(TPACPI_ERR
8067 "unable to register hwmon platform driver\n");
8068 thinkpad_acpi_module_exit();
8069 return ret;
8070 }
8071 tp_features.sensors_pdrv_registered = 1;
8072
8073 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8074 if (!ret) {
8075 tp_features.platform_drv_attrs_registered = 1;
8076 ret = tpacpi_create_driver_attributes(
8077 &tpacpi_hwmon_pdriver.driver);
8078 }
8079 if (ret) {
8080 printk(TPACPI_ERR
8081 "unable to create sysfs driver attributes\n");
8082 thinkpad_acpi_module_exit();
8083 return ret;
8084 }
8085 tp_features.sensors_pdrv_attrs_registered = 1;
8086
8087
8088 /* Device initialization */
8089 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8090 NULL, 0);
8091 if (IS_ERR(tpacpi_pdev)) {
8092 ret = PTR_ERR(tpacpi_pdev);
8093 tpacpi_pdev = NULL;
8094 printk(TPACPI_ERR "unable to register platform device\n");
8095 thinkpad_acpi_module_exit();
8096 return ret;
8097 }
8098 tpacpi_sensors_pdev = platform_device_register_simple(
8099 TPACPI_HWMON_DRVR_NAME,
8100 -1, NULL, 0);
8101 if (IS_ERR(tpacpi_sensors_pdev)) {
8102 ret = PTR_ERR(tpacpi_sensors_pdev);
8103 tpacpi_sensors_pdev = NULL;
8104 printk(TPACPI_ERR
8105 "unable to register hwmon platform device\n");
8106 thinkpad_acpi_module_exit();
8107 return ret;
8108 }
8109 ret = device_create_file(&tpacpi_sensors_pdev->dev,
8110 &dev_attr_thinkpad_acpi_pdev_name);
8111 if (ret) {
8112 printk(TPACPI_ERR
8113 "unable to create sysfs hwmon device attributes\n");
8114 thinkpad_acpi_module_exit();
8115 return ret;
8116 }
8117 tp_features.sensors_pdev_attrs_registered = 1;
8118 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8119 if (IS_ERR(tpacpi_hwmon)) {
8120 ret = PTR_ERR(tpacpi_hwmon);
8121 tpacpi_hwmon = NULL;
8122 printk(TPACPI_ERR "unable to register hwmon device\n");
8123 thinkpad_acpi_module_exit();
8124 return ret;
8125 }
8126 mutex_init(&tpacpi_inputdev_send_mutex);
8127 tpacpi_inputdev = input_allocate_device();
8128 if (!tpacpi_inputdev) {
8129 printk(TPACPI_ERR "unable to allocate input device\n");
8130 thinkpad_acpi_module_exit();
8131 return -ENOMEM;
8132 } else {
8133 /* Prepare input device, but don't register */
8134 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8135 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8136 tpacpi_inputdev->id.bustype = BUS_HOST;
8137 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8138 thinkpad_id.vendor :
8139 PCI_VENDOR_ID_IBM;
8140 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8141 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8142 }
8143 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8144 ret = ibm_init(&ibms_init[i]);
8145 if (ret >= 0 && *ibms_init[i].param)
8146 ret = ibms_init[i].data->write(ibms_init[i].param);
8147 if (ret < 0) {
8148 thinkpad_acpi_module_exit();
8149 return ret;
8150 }
8151 }
8152 ret = input_register_device(tpacpi_inputdev);
8153 if (ret < 0) {
8154 printk(TPACPI_ERR "unable to register input device\n");
8155 thinkpad_acpi_module_exit();
8156 return ret;
8157 } else {
8158 tp_features.input_device_registered = 1;
8159 }
8160
8161 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8162 return 0;
8163 }
8164
8165 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8166
8167 /*
8168 * This will autoload the driver in almost every ThinkPad
8169 * in widespread use.
8170 *
8171 * Only _VERY_ old models, like the 240, 240x and 570 lack
8172 * the HKEY event interface.
8173 */
8174 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8175
8176 /*
8177 * DMI matching for module autoloading
8178 *
8179 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8180 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8181 *
8182 * Only models listed in thinkwiki will be supported, so add yours
8183 * if it is not there yet.
8184 */
8185 #define IBM_BIOS_MODULE_ALIAS(__type) \
8186 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8187
8188 /* Ancient thinkpad BIOSes have to be identified by
8189 * BIOS type or model number, and there are far less
8190 * BIOS types than model numbers... */
8191 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
8192
8193 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8194 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8195 MODULE_DESCRIPTION(TPACPI_DESC);
8196 MODULE_VERSION(TPACPI_VERSION);
8197 MODULE_LICENSE("GPL");
8198
8199 module_init(thinkpad_acpi_module_init);
8200 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree