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thinkpad-acpi: don't leave ERR_PTR() pointers around
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blobb789ee8bc14e227e90cae24e944c9f896e502900
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 rfkill_destroy(tp_rfk->rfkill);
1282 tpacpi_rfkill_switches[id] = NULL;
1283 kfree(tp_rfk);
1284 }
1285 }
1286
1287 static void printk_deprecated_rfkill_attribute(const char * const what)
1288 {
1289 printk_deprecated_attribute(what,
1290 "Please switch to generic rfkill before year 2010");
1291 }
1292
1293 /* sysfs <radio> enable ------------------------------------------------ */
1294 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1295 struct device_attribute *attr,
1296 char *buf)
1297 {
1298 int status;
1299
1300 printk_deprecated_rfkill_attribute(attr->attr.name);
1301
1302 /* This is in the ABI... */
1303 if (tpacpi_rfk_check_hwblock_state()) {
1304 status = TPACPI_RFK_RADIO_OFF;
1305 } else {
1306 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1307 if (status < 0)
1308 return status;
1309 }
1310
1311 return snprintf(buf, PAGE_SIZE, "%d\n",
1312 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1313 }
1314
1315 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1316 struct device_attribute *attr,
1317 const char *buf, size_t count)
1318 {
1319 unsigned long t;
1320 int res;
1321
1322 printk_deprecated_rfkill_attribute(attr->attr.name);
1323
1324 if (parse_strtoul(buf, 1, &t))
1325 return -EINVAL;
1326
1327 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1328
1329 /* This is in the ABI... */
1330 if (tpacpi_rfk_check_hwblock_state() && !!t)
1331 return -EPERM;
1332
1333 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1334 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1335 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1336
1337 return (res < 0) ? res : count;
1338 }
1339
1340 /* procfs -------------------------------------------------------------- */
1341 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1342 {
1343 int len = 0;
1344
1345 if (id >= TPACPI_RFK_SW_MAX)
1346 len += sprintf(p + len, "status:\t\tnot supported\n");
1347 else {
1348 int status;
1349
1350 /* This is in the ABI... */
1351 if (tpacpi_rfk_check_hwblock_state()) {
1352 status = TPACPI_RFK_RADIO_OFF;
1353 } else {
1354 status = tpacpi_rfk_update_swstate(
1355 tpacpi_rfkill_switches[id]);
1356 if (status < 0)
1357 return status;
1358 }
1359
1360 len += sprintf(p + len, "status:\t\t%s\n",
1361 (status == TPACPI_RFK_RADIO_ON) ?
1362 "enabled" : "disabled");
1363 len += sprintf(p + len, "commands:\tenable, disable\n");
1364 }
1365
1366 return len;
1367 }
1368
1369 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1370 {
1371 char *cmd;
1372 int status = -1;
1373 int res = 0;
1374
1375 if (id >= TPACPI_RFK_SW_MAX)
1376 return -ENODEV;
1377
1378 while ((cmd = next_cmd(&buf))) {
1379 if (strlencmp(cmd, "enable") == 0)
1380 status = TPACPI_RFK_RADIO_ON;
1381 else if (strlencmp(cmd, "disable") == 0)
1382 status = TPACPI_RFK_RADIO_OFF;
1383 else
1384 return -EINVAL;
1385 }
1386
1387 if (status != -1) {
1388 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1389 (status == TPACPI_RFK_RADIO_ON) ?
1390 "enable" : "disable",
1391 tpacpi_rfkill_names[id]);
1392 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1393 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1394 }
1395
1396 return res;
1397 }
1398
1399 /*************************************************************************
1400 * thinkpad-acpi driver attributes
1401 */
1402
1403 /* interface_version --------------------------------------------------- */
1404 static ssize_t tpacpi_driver_interface_version_show(
1405 struct device_driver *drv,
1406 char *buf)
1407 {
1408 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1409 }
1410
1411 static DRIVER_ATTR(interface_version, S_IRUGO,
1412 tpacpi_driver_interface_version_show, NULL);
1413
1414 /* debug_level --------------------------------------------------------- */
1415 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1416 char *buf)
1417 {
1418 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1419 }
1420
1421 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1422 const char *buf, size_t count)
1423 {
1424 unsigned long t;
1425
1426 if (parse_strtoul(buf, 0xffff, &t))
1427 return -EINVAL;
1428
1429 dbg_level = t;
1430
1431 return count;
1432 }
1433
1434 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1435 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1436
1437 /* version ------------------------------------------------------------- */
1438 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1439 char *buf)
1440 {
1441 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1442 TPACPI_DESC, TPACPI_VERSION);
1443 }
1444
1445 static DRIVER_ATTR(version, S_IRUGO,
1446 tpacpi_driver_version_show, NULL);
1447
1448 /* --------------------------------------------------------------------- */
1449
1450 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1451
1452 /* wlsw_emulstate ------------------------------------------------------ */
1453 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1454 char *buf)
1455 {
1456 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1457 }
1458
1459 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1460 const char *buf, size_t count)
1461 {
1462 unsigned long t;
1463
1464 if (parse_strtoul(buf, 1, &t))
1465 return -EINVAL;
1466
1467 if (tpacpi_wlsw_emulstate != !!t) {
1468 tpacpi_wlsw_emulstate = !!t;
1469 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1470 }
1471
1472 return count;
1473 }
1474
1475 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1476 tpacpi_driver_wlsw_emulstate_show,
1477 tpacpi_driver_wlsw_emulstate_store);
1478
1479 /* bluetooth_emulstate ------------------------------------------------- */
1480 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1481 struct device_driver *drv,
1482 char *buf)
1483 {
1484 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1485 }
1486
1487 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1488 struct device_driver *drv,
1489 const char *buf, size_t count)
1490 {
1491 unsigned long t;
1492
1493 if (parse_strtoul(buf, 1, &t))
1494 return -EINVAL;
1495
1496 tpacpi_bluetooth_emulstate = !!t;
1497
1498 return count;
1499 }
1500
1501 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1502 tpacpi_driver_bluetooth_emulstate_show,
1503 tpacpi_driver_bluetooth_emulstate_store);
1504
1505 /* wwan_emulstate ------------------------------------------------- */
1506 static ssize_t tpacpi_driver_wwan_emulstate_show(
1507 struct device_driver *drv,
1508 char *buf)
1509 {
1510 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1511 }
1512
1513 static ssize_t tpacpi_driver_wwan_emulstate_store(
1514 struct device_driver *drv,
1515 const char *buf, size_t count)
1516 {
1517 unsigned long t;
1518
1519 if (parse_strtoul(buf, 1, &t))
1520 return -EINVAL;
1521
1522 tpacpi_wwan_emulstate = !!t;
1523
1524 return count;
1525 }
1526
1527 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1528 tpacpi_driver_wwan_emulstate_show,
1529 tpacpi_driver_wwan_emulstate_store);
1530
1531 /* uwb_emulstate ------------------------------------------------- */
1532 static ssize_t tpacpi_driver_uwb_emulstate_show(
1533 struct device_driver *drv,
1534 char *buf)
1535 {
1536 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1537 }
1538
1539 static ssize_t tpacpi_driver_uwb_emulstate_store(
1540 struct device_driver *drv,
1541 const char *buf, size_t count)
1542 {
1543 unsigned long t;
1544
1545 if (parse_strtoul(buf, 1, &t))
1546 return -EINVAL;
1547
1548 tpacpi_uwb_emulstate = !!t;
1549
1550 return count;
1551 }
1552
1553 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1554 tpacpi_driver_uwb_emulstate_show,
1555 tpacpi_driver_uwb_emulstate_store);
1556 #endif
1557
1558 /* --------------------------------------------------------------------- */
1559
1560 static struct driver_attribute *tpacpi_driver_attributes[] = {
1561 &driver_attr_debug_level, &driver_attr_version,
1562 &driver_attr_interface_version,
1563 };
1564
1565 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1566 {
1567 int i, res;
1568
1569 i = 0;
1570 res = 0;
1571 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1572 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1573 i++;
1574 }
1575
1576 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1577 if (!res && dbg_wlswemul)
1578 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1579 if (!res && dbg_bluetoothemul)
1580 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1581 if (!res && dbg_wwanemul)
1582 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1583 if (!res && dbg_uwbemul)
1584 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1585 #endif
1586
1587 return res;
1588 }
1589
1590 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1591 {
1592 int i;
1593
1594 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1595 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1596
1597 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1598 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1599 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1600 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1601 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1602 #endif
1603 }
1604
1605 /*************************************************************************
1606 * Firmware Data
1607 */
1608
1609 /*
1610 * Table of recommended minimum BIOS versions
1611 *
1612 * Reasons for listing:
1613 * 1. Stable BIOS, listed because the unknown ammount of
1614 * bugs and bad ACPI behaviour on older versions
1615 *
1616 * 2. BIOS or EC fw with known bugs that trigger on Linux
1617 *
1618 * 3. BIOS with known reduced functionality in older versions
1619 *
1620 * We recommend the latest BIOS and EC version.
1621 * We only support the latest BIOS and EC fw version as a rule.
1622 *
1623 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1624 * Information from users in ThinkWiki
1625 *
1626 * WARNING: we use this table also to detect that the machine is
1627 * a ThinkPad in some cases, so don't remove entries lightly.
1628 */
1629
1630 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1631 { .vendor = (__v), \
1632 .bios = TPID(__id1, __id2), \
1633 .ec = TPACPI_MATCH_ANY, \
1634 .quirks = TPACPI_MATCH_ANY << 16 \
1635 | (__bv1) << 8 | (__bv2) }
1636
1637 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1638 __eid1, __eid2, __ev1, __ev2) \
1639 { .vendor = (__v), \
1640 .bios = TPID(__bid1, __bid2), \
1641 .ec = TPID(__eid1, __eid2), \
1642 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1643 | (__bv1) << 8 | (__bv2) }
1644
1645 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1646 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1647
1648 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1649 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1650 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1651
1652 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1653 __eid1, __eid2, __ev1, __ev2) \
1654 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1655 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1656
1657 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1658 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1659
1660 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1661 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1662 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1663
1664 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1665 __eid1, __eid2, __ev1, __ev2) \
1666 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1667 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1668
1669 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1670 /* Numeric models ------------------ */
1671 /* FW MODEL BIOS VERS */
1672 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1673 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1674 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1675 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1676 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1677 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1678 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1679 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1680 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1681
1682 /* A-series ------------------------- */
1683 /* FW MODEL BIOS VERS EC VERS */
1684 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1685 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1686 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1687 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1688 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1689 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1690 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1691 TPV_QI0('1', '3', '2', '0'), /* A22m */
1692 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1693 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1694 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1695
1696 /* G-series ------------------------- */
1697 /* FW MODEL BIOS VERS */
1698 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1699 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1700
1701 /* R-series, T-series --------------- */
1702 /* FW MODEL BIOS VERS EC VERS */
1703 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1704 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1705 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1706 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1707 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1708 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1709 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1710 T40/p, T41/p, T42/p (1) */
1711 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1712 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1713 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1714 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1715
1716 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1717 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1718 TPV_QI0('1', '6', '3', '2'), /* T22 */
1719 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1720 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1721 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1722
1723 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1724 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1725 TPV_QL0('7', 'E', 'D', '0'), /* R60e, R60i */
1726
1727 /* BIOS FW BIOS VERS EC FW EC VERS */
1728 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1729 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1730
1731 /* X-series ------------------------- */
1732 /* FW MODEL BIOS VERS EC VERS */
1733 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1734 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1735 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1736 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1737 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1738 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1739 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1740
1741 TPV_QL0('7', 'B', 'D', '7'), /* X60/s */
1742 TPV_QL0('7', 'J', '3', '0'), /* X60t */
1743
1744 /* (0) - older versions lack DMI EC fw string and functionality */
1745 /* (1) - older versions known to lack functionality */
1746 };
1747
1748 #undef TPV_QL1
1749 #undef TPV_QL0
1750 #undef TPV_QI2
1751 #undef TPV_QI1
1752 #undef TPV_QI0
1753 #undef TPV_Q_X
1754 #undef TPV_Q
1755
1756 static void __init tpacpi_check_outdated_fw(void)
1757 {
1758 unsigned long fwvers;
1759 u16 ec_version, bios_version;
1760
1761 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1762 ARRAY_SIZE(tpacpi_bios_version_qtable));
1763
1764 if (!fwvers)
1765 return;
1766
1767 bios_version = fwvers & 0xffffU;
1768 ec_version = (fwvers >> 16) & 0xffffU;
1769
1770 /* note that unknown versions are set to 0x0000 and we use that */
1771 if ((bios_version > thinkpad_id.bios_release) ||
1772 (ec_version > thinkpad_id.ec_release &&
1773 ec_version != TPACPI_MATCH_ANY)) {
1774 /*
1775 * The changelogs would let us track down the exact
1776 * reason, but it is just too much of a pain to track
1777 * it. We only list BIOSes that are either really
1778 * broken, or really stable to begin with, so it is
1779 * best if the user upgrades the firmware anyway.
1780 */
1781 printk(TPACPI_WARN
1782 "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1783 printk(TPACPI_WARN
1784 "WARNING: This firmware may be missing critical bug "
1785 "fixes and/or important features\n");
1786 }
1787 }
1788
1789 static bool __init tpacpi_is_fw_known(void)
1790 {
1791 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1792 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1793 }
1794
1795 /****************************************************************************
1796 ****************************************************************************
1797 *
1798 * Subdrivers
1799 *
1800 ****************************************************************************
1801 ****************************************************************************/
1802
1803 /*************************************************************************
1804 * thinkpad-acpi init subdriver
1805 */
1806
1807 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1808 {
1809 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1810 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1811
1812 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1813 (thinkpad_id.bios_version_str) ?
1814 thinkpad_id.bios_version_str : "unknown",
1815 (thinkpad_id.ec_version_str) ?
1816 thinkpad_id.ec_version_str : "unknown");
1817
1818 if (thinkpad_id.vendor && thinkpad_id.model_str)
1819 printk(TPACPI_INFO "%s %s, model %s\n",
1820 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1821 "IBM" : ((thinkpad_id.vendor ==
1822 PCI_VENDOR_ID_LENOVO) ?
1823 "Lenovo" : "Unknown vendor"),
1824 thinkpad_id.model_str,
1825 (thinkpad_id.nummodel_str) ?
1826 thinkpad_id.nummodel_str : "unknown");
1827
1828 tpacpi_check_outdated_fw();
1829 return 0;
1830 }
1831
1832 static int thinkpad_acpi_driver_read(char *p)
1833 {
1834 int len = 0;
1835
1836 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1837 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1838
1839 return len;
1840 }
1841
1842 static struct ibm_struct thinkpad_acpi_driver_data = {
1843 .name = "driver",
1844 .read = thinkpad_acpi_driver_read,
1845 };
1846
1847 /*************************************************************************
1848 * Hotkey subdriver
1849 */
1850
1851 enum { /* hot key scan codes (derived from ACPI DSDT) */
1852 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1853 TP_ACPI_HOTKEYSCAN_FNF2,
1854 TP_ACPI_HOTKEYSCAN_FNF3,
1855 TP_ACPI_HOTKEYSCAN_FNF4,
1856 TP_ACPI_HOTKEYSCAN_FNF5,
1857 TP_ACPI_HOTKEYSCAN_FNF6,
1858 TP_ACPI_HOTKEYSCAN_FNF7,
1859 TP_ACPI_HOTKEYSCAN_FNF8,
1860 TP_ACPI_HOTKEYSCAN_FNF9,
1861 TP_ACPI_HOTKEYSCAN_FNF10,
1862 TP_ACPI_HOTKEYSCAN_FNF11,
1863 TP_ACPI_HOTKEYSCAN_FNF12,
1864 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1865 TP_ACPI_HOTKEYSCAN_FNINSERT,
1866 TP_ACPI_HOTKEYSCAN_FNDELETE,
1867 TP_ACPI_HOTKEYSCAN_FNHOME,
1868 TP_ACPI_HOTKEYSCAN_FNEND,
1869 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1870 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1871 TP_ACPI_HOTKEYSCAN_FNSPACE,
1872 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1873 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1874 TP_ACPI_HOTKEYSCAN_MUTE,
1875 TP_ACPI_HOTKEYSCAN_THINKPAD,
1876 };
1877
1878 enum { /* Keys available through NVRAM polling */
1879 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1880 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1881 };
1882
1883 enum { /* Positions of some of the keys in hotkey masks */
1884 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1885 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1886 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1887 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1888 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1889 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1890 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1891 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1892 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1893 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1894 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1895 };
1896
1897 enum { /* NVRAM to ACPI HKEY group map */
1898 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1899 TP_ACPI_HKEY_ZOOM_MASK |
1900 TP_ACPI_HKEY_DISPSWTCH_MASK |
1901 TP_ACPI_HKEY_HIBERNATE_MASK,
1902 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1903 TP_ACPI_HKEY_BRGHTDWN_MASK,
1904 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1905 TP_ACPI_HKEY_VOLDWN_MASK |
1906 TP_ACPI_HKEY_MUTE_MASK,
1907 };
1908
1909 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1910 struct tp_nvram_state {
1911 u16 thinkpad_toggle:1;
1912 u16 zoom_toggle:1;
1913 u16 display_toggle:1;
1914 u16 thinklight_toggle:1;
1915 u16 hibernate_toggle:1;
1916 u16 displayexp_toggle:1;
1917 u16 display_state:1;
1918 u16 brightness_toggle:1;
1919 u16 volume_toggle:1;
1920 u16 mute:1;
1921
1922 u8 brightness_level;
1923 u8 volume_level;
1924 };
1925
1926 /* kthread for the hotkey poller */
1927 static struct task_struct *tpacpi_hotkey_task;
1928
1929 /* Acquired while the poller kthread is running, use to sync start/stop */
1930 static struct mutex hotkey_thread_mutex;
1931
1932 /*
1933 * Acquire mutex to write poller control variables.
1934 * Increment hotkey_config_change when changing them.
1935 *
1936 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1937 */
1938 static struct mutex hotkey_thread_data_mutex;
1939 static unsigned int hotkey_config_change;
1940
1941 /*
1942 * hotkey poller control variables
1943 *
1944 * Must be atomic or readers will also need to acquire mutex
1945 */
1946 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1947 static unsigned int hotkey_poll_freq = 10; /* Hz */
1948
1949 #define HOTKEY_CONFIG_CRITICAL_START \
1950 do { \
1951 mutex_lock(&hotkey_thread_data_mutex); \
1952 hotkey_config_change++; \
1953 } while (0);
1954 #define HOTKEY_CONFIG_CRITICAL_END \
1955 mutex_unlock(&hotkey_thread_data_mutex);
1956
1957 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1958
1959 #define hotkey_source_mask 0U
1960 #define HOTKEY_CONFIG_CRITICAL_START
1961 #define HOTKEY_CONFIG_CRITICAL_END
1962
1963 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1964
1965 static struct mutex hotkey_mutex;
1966
1967 static enum { /* Reasons for waking up */
1968 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1969 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1970 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1971 } hotkey_wakeup_reason;
1972
1973 static int hotkey_autosleep_ack;
1974
1975 static u32 hotkey_orig_mask;
1976 static u32 hotkey_all_mask;
1977 static u32 hotkey_reserved_mask;
1978 static u32 hotkey_mask;
1979
1980 static unsigned int hotkey_report_mode;
1981
1982 static u16 *hotkey_keycode_map;
1983
1984 static struct attribute_set *hotkey_dev_attributes;
1985
1986 /* HKEY.MHKG() return bits */
1987 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1988
1989 static int hotkey_get_wlsw(void)
1990 {
1991 int status;
1992
1993 if (!tp_features.hotkey_wlsw)
1994 return -ENODEV;
1995
1996 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1997 if (dbg_wlswemul)
1998 return (tpacpi_wlsw_emulstate) ?
1999 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2000 #endif
2001
2002 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2003 return -EIO;
2004
2005 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2006 }
2007
2008 static int hotkey_get_tablet_mode(int *status)
2009 {
2010 int s;
2011
2012 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2013 return -EIO;
2014
2015 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2016 return 0;
2017 }
2018
2019 /*
2020 * Call with hotkey_mutex held
2021 */
2022 static int hotkey_mask_get(void)
2023 {
2024 u32 m = 0;
2025
2026 if (tp_features.hotkey_mask) {
2027 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2028 return -EIO;
2029 }
2030 HOTKEY_CONFIG_CRITICAL_START
2031 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
2032 HOTKEY_CONFIG_CRITICAL_END
2033
2034 return 0;
2035 }
2036
2037 /*
2038 * Call with hotkey_mutex held
2039 */
2040 static int hotkey_mask_set(u32 mask)
2041 {
2042 int i;
2043 int rc = 0;
2044
2045 if (tp_features.hotkey_mask) {
2046 if (!tp_warned.hotkey_mask_ff &&
2047 (mask == 0xffff || mask == 0xffffff ||
2048 mask == 0xffffffff)) {
2049 tp_warned.hotkey_mask_ff = 1;
2050 printk(TPACPI_NOTICE
2051 "setting the hotkey mask to 0x%08x is likely "
2052 "not the best way to go about it\n", mask);
2053 printk(TPACPI_NOTICE
2054 "please consider using the driver defaults, "
2055 "and refer to up-to-date thinkpad-acpi "
2056 "documentation\n");
2057 }
2058
2059 HOTKEY_CONFIG_CRITICAL_START
2060 for (i = 0; i < 32; i++) {
2061 u32 m = 1 << i;
2062 /* enable in firmware mask only keys not in NVRAM
2063 * mode, but enable the key in the cached hotkey_mask
2064 * regardless of mode, or the key will end up
2065 * disabled by hotkey_mask_get() */
2066 if (!acpi_evalf(hkey_handle,
2067 NULL, "MHKM", "vdd", i + 1,
2068 !!((mask & ~hotkey_source_mask) & m))) {
2069 rc = -EIO;
2070 break;
2071 } else {
2072 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
2073 }
2074 }
2075 HOTKEY_CONFIG_CRITICAL_END
2076
2077 /* hotkey_mask_get must be called unconditionally below */
2078 if (!hotkey_mask_get() && !rc &&
2079 (hotkey_mask & ~hotkey_source_mask) !=
2080 (mask & ~hotkey_source_mask)) {
2081 printk(TPACPI_NOTICE
2082 "requested hot key mask 0x%08x, but "
2083 "firmware forced it to 0x%08x\n",
2084 mask, hotkey_mask);
2085 }
2086 } else {
2087 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2088 HOTKEY_CONFIG_CRITICAL_START
2089 hotkey_mask = mask & hotkey_source_mask;
2090 HOTKEY_CONFIG_CRITICAL_END
2091 hotkey_mask_get();
2092 if (hotkey_mask != mask) {
2093 printk(TPACPI_NOTICE
2094 "requested hot key mask 0x%08x, "
2095 "forced to 0x%08x (NVRAM poll mask is "
2096 "0x%08x): no firmware mask support\n",
2097 mask, hotkey_mask, hotkey_source_mask);
2098 }
2099 #else
2100 hotkey_mask_get();
2101 rc = -ENXIO;
2102 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2103 }
2104
2105 return rc;
2106 }
2107
2108 static int hotkey_status_get(int *status)
2109 {
2110 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2111 return -EIO;
2112
2113 return 0;
2114 }
2115
2116 static int hotkey_status_set(bool enable)
2117 {
2118 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2119 return -EIO;
2120
2121 return 0;
2122 }
2123
2124 static void tpacpi_input_send_tabletsw(void)
2125 {
2126 int state;
2127
2128 if (tp_features.hotkey_tablet &&
2129 !hotkey_get_tablet_mode(&state)) {
2130 mutex_lock(&tpacpi_inputdev_send_mutex);
2131
2132 input_report_switch(tpacpi_inputdev,
2133 SW_TABLET_MODE, !!state);
2134 input_sync(tpacpi_inputdev);
2135
2136 mutex_unlock(&tpacpi_inputdev_send_mutex);
2137 }
2138 }
2139
2140 static void tpacpi_input_send_key(unsigned int scancode)
2141 {
2142 unsigned int keycode;
2143
2144 keycode = hotkey_keycode_map[scancode];
2145
2146 if (keycode != KEY_RESERVED) {
2147 mutex_lock(&tpacpi_inputdev_send_mutex);
2148
2149 input_report_key(tpacpi_inputdev, keycode, 1);
2150 if (keycode == KEY_UNKNOWN)
2151 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2152 scancode);
2153 input_sync(tpacpi_inputdev);
2154
2155 input_report_key(tpacpi_inputdev, keycode, 0);
2156 if (keycode == KEY_UNKNOWN)
2157 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2158 scancode);
2159 input_sync(tpacpi_inputdev);
2160
2161 mutex_unlock(&tpacpi_inputdev_send_mutex);
2162 }
2163 }
2164
2165 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2166 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2167
2168 static void tpacpi_hotkey_send_key(unsigned int scancode)
2169 {
2170 tpacpi_input_send_key(scancode);
2171 if (hotkey_report_mode < 2) {
2172 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2173 0x80, 0x1001 + scancode);
2174 }
2175 }
2176
2177 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
2178 {
2179 u8 d;
2180
2181 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2182 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2183 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2184 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2185 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2186 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2187 }
2188 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2189 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2190 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2191 }
2192 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2193 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2194 n->displayexp_toggle =
2195 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2196 }
2197 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2198 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2199 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2200 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2201 n->brightness_toggle =
2202 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2203 }
2204 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2205 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2206 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2207 >> TP_NVRAM_POS_LEVEL_VOLUME;
2208 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2209 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2210 }
2211 }
2212
2213 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2214 do { \
2215 if ((mask & (1 << __scancode)) && \
2216 oldn->__member != newn->__member) \
2217 tpacpi_hotkey_send_key(__scancode); \
2218 } while (0)
2219
2220 #define TPACPI_MAY_SEND_KEY(__scancode) \
2221 do { if (mask & (1 << __scancode)) \
2222 tpacpi_hotkey_send_key(__scancode); } while (0)
2223
2224 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2225 struct tp_nvram_state *newn,
2226 u32 mask)
2227 {
2228 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2229 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2230 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2231 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2232
2233 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2234
2235 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2236
2237 /* handle volume */
2238 if (oldn->volume_toggle != newn->volume_toggle) {
2239 if (oldn->mute != newn->mute) {
2240 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2241 }
2242 if (oldn->volume_level > newn->volume_level) {
2243 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2244 } else if (oldn->volume_level < newn->volume_level) {
2245 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2246 } else if (oldn->mute == newn->mute) {
2247 /* repeated key presses that didn't change state */
2248 if (newn->mute) {
2249 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2250 } else if (newn->volume_level != 0) {
2251 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2252 } else {
2253 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2254 }
2255 }
2256 }
2257
2258 /* handle brightness */
2259 if (oldn->brightness_toggle != newn->brightness_toggle) {
2260 if (oldn->brightness_level < newn->brightness_level) {
2261 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2262 } else if (oldn->brightness_level > newn->brightness_level) {
2263 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2264 } else {
2265 /* repeated key presses that didn't change state */
2266 if (newn->brightness_level != 0) {
2267 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2268 } else {
2269 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2270 }
2271 }
2272 }
2273 }
2274
2275 #undef TPACPI_COMPARE_KEY
2276 #undef TPACPI_MAY_SEND_KEY
2277
2278 static int hotkey_kthread(void *data)
2279 {
2280 struct tp_nvram_state s[2];
2281 u32 mask;
2282 unsigned int si, so;
2283 unsigned long t;
2284 unsigned int change_detector, must_reset;
2285 unsigned int poll_freq;
2286
2287 mutex_lock(&hotkey_thread_mutex);
2288
2289 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2290 goto exit;
2291
2292 set_freezable();
2293
2294 so = 0;
2295 si = 1;
2296 t = 0;
2297
2298 /* Initial state for compares */
2299 mutex_lock(&hotkey_thread_data_mutex);
2300 change_detector = hotkey_config_change;
2301 mask = hotkey_source_mask & hotkey_mask;
2302 poll_freq = hotkey_poll_freq;
2303 mutex_unlock(&hotkey_thread_data_mutex);
2304 hotkey_read_nvram(&s[so], mask);
2305
2306 while (!kthread_should_stop()) {
2307 if (t == 0) {
2308 if (likely(poll_freq))
2309 t = 1000/poll_freq;
2310 else
2311 t = 100; /* should never happen... */
2312 }
2313 t = msleep_interruptible(t);
2314 if (unlikely(kthread_should_stop()))
2315 break;
2316 must_reset = try_to_freeze();
2317 if (t > 0 && !must_reset)
2318 continue;
2319
2320 mutex_lock(&hotkey_thread_data_mutex);
2321 if (must_reset || hotkey_config_change != change_detector) {
2322 /* forget old state on thaw or config change */
2323 si = so;
2324 t = 0;
2325 change_detector = hotkey_config_change;
2326 }
2327 mask = hotkey_source_mask & hotkey_mask;
2328 poll_freq = hotkey_poll_freq;
2329 mutex_unlock(&hotkey_thread_data_mutex);
2330
2331 if (likely(mask)) {
2332 hotkey_read_nvram(&s[si], mask);
2333 if (likely(si != so)) {
2334 hotkey_compare_and_issue_event(&s[so], &s[si],
2335 mask);
2336 }
2337 }
2338
2339 so = si;
2340 si ^= 1;
2341 }
2342
2343 exit:
2344 mutex_unlock(&hotkey_thread_mutex);
2345 return 0;
2346 }
2347
2348 /* call with hotkey_mutex held */
2349 static void hotkey_poll_stop_sync(void)
2350 {
2351 if (tpacpi_hotkey_task) {
2352 if (frozen(tpacpi_hotkey_task) ||
2353 freezing(tpacpi_hotkey_task))
2354 thaw_process(tpacpi_hotkey_task);
2355
2356 kthread_stop(tpacpi_hotkey_task);
2357 tpacpi_hotkey_task = NULL;
2358 mutex_lock(&hotkey_thread_mutex);
2359 /* at this point, the thread did exit */
2360 mutex_unlock(&hotkey_thread_mutex);
2361 }
2362 }
2363
2364 /* call with hotkey_mutex held */
2365 static void hotkey_poll_setup(bool may_warn)
2366 {
2367 u32 hotkeys_to_poll = hotkey_source_mask & hotkey_mask;
2368
2369 if (hotkeys_to_poll != 0 && hotkey_poll_freq > 0 &&
2370 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2371 if (!tpacpi_hotkey_task) {
2372 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2373 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2374 if (IS_ERR(tpacpi_hotkey_task)) {
2375 tpacpi_hotkey_task = NULL;
2376 printk(TPACPI_ERR
2377 "could not create kernel thread "
2378 "for hotkey polling\n");
2379 }
2380 }
2381 } else {
2382 hotkey_poll_stop_sync();
2383 if (may_warn && hotkeys_to_poll != 0 &&
2384 hotkey_poll_freq == 0) {
2385 printk(TPACPI_NOTICE
2386 "hot keys 0x%08x require polling, "
2387 "which is currently disabled\n",
2388 hotkeys_to_poll);
2389 }
2390 }
2391 }
2392
2393 static void hotkey_poll_setup_safe(bool may_warn)
2394 {
2395 mutex_lock(&hotkey_mutex);
2396 hotkey_poll_setup(may_warn);
2397 mutex_unlock(&hotkey_mutex);
2398 }
2399
2400 /* call with hotkey_mutex held */
2401 static void hotkey_poll_set_freq(unsigned int freq)
2402 {
2403 if (!freq)
2404 hotkey_poll_stop_sync();
2405
2406 HOTKEY_CONFIG_CRITICAL_START
2407 hotkey_poll_freq = freq;
2408 HOTKEY_CONFIG_CRITICAL_END
2409 }
2410
2411 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2412
2413 static void hotkey_poll_setup_safe(bool __unused)
2414 {
2415 }
2416
2417 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2418
2419 static int hotkey_inputdev_open(struct input_dev *dev)
2420 {
2421 switch (tpacpi_lifecycle) {
2422 case TPACPI_LIFE_INIT:
2423 /*
2424 * hotkey_init will call hotkey_poll_setup_safe
2425 * at the appropriate moment
2426 */
2427 return 0;
2428 case TPACPI_LIFE_EXITING:
2429 return -EBUSY;
2430 case TPACPI_LIFE_RUNNING:
2431 hotkey_poll_setup_safe(false);
2432 return 0;
2433 }
2434
2435 /* Should only happen if tpacpi_lifecycle is corrupt */
2436 BUG();
2437 return -EBUSY;
2438 }
2439
2440 static void hotkey_inputdev_close(struct input_dev *dev)
2441 {
2442 /* disable hotkey polling when possible */
2443 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2444 hotkey_poll_setup_safe(false);
2445 }
2446
2447 /* sysfs hotkey enable ------------------------------------------------- */
2448 static ssize_t hotkey_enable_show(struct device *dev,
2449 struct device_attribute *attr,
2450 char *buf)
2451 {
2452 int res, status;
2453
2454 printk_deprecated_attribute("hotkey_enable",
2455 "Hotkey reporting is always enabled");
2456
2457 res = hotkey_status_get(&status);
2458 if (res)
2459 return res;
2460
2461 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2462 }
2463
2464 static ssize_t hotkey_enable_store(struct device *dev,
2465 struct device_attribute *attr,
2466 const char *buf, size_t count)
2467 {
2468 unsigned long t;
2469
2470 printk_deprecated_attribute("hotkey_enable",
2471 "Hotkeys can be disabled through hotkey_mask");
2472
2473 if (parse_strtoul(buf, 1, &t))
2474 return -EINVAL;
2475
2476 if (t == 0)
2477 return -EPERM;
2478
2479 return count;
2480 }
2481
2482 static struct device_attribute dev_attr_hotkey_enable =
2483 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2484 hotkey_enable_show, hotkey_enable_store);
2485
2486 /* sysfs hotkey mask --------------------------------------------------- */
2487 static ssize_t hotkey_mask_show(struct device *dev,
2488 struct device_attribute *attr,
2489 char *buf)
2490 {
2491 int res;
2492
2493 if (mutex_lock_killable(&hotkey_mutex))
2494 return -ERESTARTSYS;
2495 res = hotkey_mask_get();
2496 mutex_unlock(&hotkey_mutex);
2497
2498 return (res)?
2499 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2500 }
2501
2502 static ssize_t hotkey_mask_store(struct device *dev,
2503 struct device_attribute *attr,
2504 const char *buf, size_t count)
2505 {
2506 unsigned long t;
2507 int res;
2508
2509 if (parse_strtoul(buf, 0xffffffffUL, &t))
2510 return -EINVAL;
2511
2512 if (mutex_lock_killable(&hotkey_mutex))
2513 return -ERESTARTSYS;
2514
2515 res = hotkey_mask_set(t);
2516
2517 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2518 hotkey_poll_setup(true);
2519 #endif
2520
2521 mutex_unlock(&hotkey_mutex);
2522
2523 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2524
2525 return (res) ? res : count;
2526 }
2527
2528 static struct device_attribute dev_attr_hotkey_mask =
2529 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2530 hotkey_mask_show, hotkey_mask_store);
2531
2532 /* sysfs hotkey bios_enabled ------------------------------------------- */
2533 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2534 struct device_attribute *attr,
2535 char *buf)
2536 {
2537 return sprintf(buf, "0\n");
2538 }
2539
2540 static struct device_attribute dev_attr_hotkey_bios_enabled =
2541 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2542
2543 /* sysfs hotkey bios_mask ---------------------------------------------- */
2544 static ssize_t hotkey_bios_mask_show(struct device *dev,
2545 struct device_attribute *attr,
2546 char *buf)
2547 {
2548 printk_deprecated_attribute("hotkey_bios_mask",
2549 "This attribute is useless.");
2550 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2551 }
2552
2553 static struct device_attribute dev_attr_hotkey_bios_mask =
2554 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2555
2556 /* sysfs hotkey all_mask ----------------------------------------------- */
2557 static ssize_t hotkey_all_mask_show(struct device *dev,
2558 struct device_attribute *attr,
2559 char *buf)
2560 {
2561 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2562 hotkey_all_mask | hotkey_source_mask);
2563 }
2564
2565 static struct device_attribute dev_attr_hotkey_all_mask =
2566 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2567
2568 /* sysfs hotkey recommended_mask --------------------------------------- */
2569 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2570 struct device_attribute *attr,
2571 char *buf)
2572 {
2573 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2574 (hotkey_all_mask | hotkey_source_mask)
2575 & ~hotkey_reserved_mask);
2576 }
2577
2578 static struct device_attribute dev_attr_hotkey_recommended_mask =
2579 __ATTR(hotkey_recommended_mask, S_IRUGO,
2580 hotkey_recommended_mask_show, NULL);
2581
2582 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2583
2584 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2585 static ssize_t hotkey_source_mask_show(struct device *dev,
2586 struct device_attribute *attr,
2587 char *buf)
2588 {
2589 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2590 }
2591
2592 static ssize_t hotkey_source_mask_store(struct device *dev,
2593 struct device_attribute *attr,
2594 const char *buf, size_t count)
2595 {
2596 unsigned long t;
2597
2598 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2599 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2600 return -EINVAL;
2601
2602 if (mutex_lock_killable(&hotkey_mutex))
2603 return -ERESTARTSYS;
2604
2605 HOTKEY_CONFIG_CRITICAL_START
2606 hotkey_source_mask = t;
2607 HOTKEY_CONFIG_CRITICAL_END
2608
2609 hotkey_poll_setup(true);
2610 hotkey_mask_set(hotkey_mask);
2611
2612 mutex_unlock(&hotkey_mutex);
2613
2614 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2615
2616 return count;
2617 }
2618
2619 static struct device_attribute dev_attr_hotkey_source_mask =
2620 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2621 hotkey_source_mask_show, hotkey_source_mask_store);
2622
2623 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2624 static ssize_t hotkey_poll_freq_show(struct device *dev,
2625 struct device_attribute *attr,
2626 char *buf)
2627 {
2628 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2629 }
2630
2631 static ssize_t hotkey_poll_freq_store(struct device *dev,
2632 struct device_attribute *attr,
2633 const char *buf, size_t count)
2634 {
2635 unsigned long t;
2636
2637 if (parse_strtoul(buf, 25, &t))
2638 return -EINVAL;
2639
2640 if (mutex_lock_killable(&hotkey_mutex))
2641 return -ERESTARTSYS;
2642
2643 hotkey_poll_set_freq(t);
2644 hotkey_poll_setup(true);
2645
2646 mutex_unlock(&hotkey_mutex);
2647
2648 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2649
2650 return count;
2651 }
2652
2653 static struct device_attribute dev_attr_hotkey_poll_freq =
2654 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2655 hotkey_poll_freq_show, hotkey_poll_freq_store);
2656
2657 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2658
2659 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2660 static ssize_t hotkey_radio_sw_show(struct device *dev,
2661 struct device_attribute *attr,
2662 char *buf)
2663 {
2664 int res;
2665 res = hotkey_get_wlsw();
2666 if (res < 0)
2667 return res;
2668
2669 /* Opportunistic update */
2670 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2671
2672 return snprintf(buf, PAGE_SIZE, "%d\n",
2673 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2674 }
2675
2676 static struct device_attribute dev_attr_hotkey_radio_sw =
2677 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2678
2679 static void hotkey_radio_sw_notify_change(void)
2680 {
2681 if (tp_features.hotkey_wlsw)
2682 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2683 "hotkey_radio_sw");
2684 }
2685
2686 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2687 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2688 struct device_attribute *attr,
2689 char *buf)
2690 {
2691 int res, s;
2692 res = hotkey_get_tablet_mode(&s);
2693 if (res < 0)
2694 return res;
2695
2696 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2697 }
2698
2699 static struct device_attribute dev_attr_hotkey_tablet_mode =
2700 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2701
2702 static void hotkey_tablet_mode_notify_change(void)
2703 {
2704 if (tp_features.hotkey_tablet)
2705 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2706 "hotkey_tablet_mode");
2707 }
2708
2709 /* sysfs hotkey report_mode -------------------------------------------- */
2710 static ssize_t hotkey_report_mode_show(struct device *dev,
2711 struct device_attribute *attr,
2712 char *buf)
2713 {
2714 return snprintf(buf, PAGE_SIZE, "%d\n",
2715 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2716 }
2717
2718 static struct device_attribute dev_attr_hotkey_report_mode =
2719 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2720
2721 /* sysfs wakeup reason (pollable) -------------------------------------- */
2722 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2723 struct device_attribute *attr,
2724 char *buf)
2725 {
2726 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2727 }
2728
2729 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2730 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2731
2732 static void hotkey_wakeup_reason_notify_change(void)
2733 {
2734 if (tp_features.hotkey_mask)
2735 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2736 "wakeup_reason");
2737 }
2738
2739 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2740 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2741 struct device_attribute *attr,
2742 char *buf)
2743 {
2744 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2745 }
2746
2747 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2748 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2749 hotkey_wakeup_hotunplug_complete_show, NULL);
2750
2751 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2752 {
2753 if (tp_features.hotkey_mask)
2754 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2755 "wakeup_hotunplug_complete");
2756 }
2757
2758 /* --------------------------------------------------------------------- */
2759
2760 static struct attribute *hotkey_attributes[] __initdata = {
2761 &dev_attr_hotkey_enable.attr,
2762 &dev_attr_hotkey_bios_enabled.attr,
2763 &dev_attr_hotkey_report_mode.attr,
2764 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2765 &dev_attr_hotkey_mask.attr,
2766 &dev_attr_hotkey_all_mask.attr,
2767 &dev_attr_hotkey_recommended_mask.attr,
2768 &dev_attr_hotkey_source_mask.attr,
2769 &dev_attr_hotkey_poll_freq.attr,
2770 #endif
2771 };
2772
2773 static struct attribute *hotkey_mask_attributes[] __initdata = {
2774 &dev_attr_hotkey_bios_mask.attr,
2775 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2776 &dev_attr_hotkey_mask.attr,
2777 &dev_attr_hotkey_all_mask.attr,
2778 &dev_attr_hotkey_recommended_mask.attr,
2779 #endif
2780 &dev_attr_hotkey_wakeup_reason.attr,
2781 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2782 };
2783
2784 /*
2785 * Sync both the hw and sw blocking state of all switches
2786 */
2787 static void tpacpi_send_radiosw_update(void)
2788 {
2789 int wlsw;
2790
2791 /*
2792 * We must sync all rfkill controllers *before* issuing any
2793 * rfkill input events, or we will race the rfkill core input
2794 * handler.
2795 *
2796 * tpacpi_inputdev_send_mutex works as a syncronization point
2797 * for the above.
2798 *
2799 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2800 */
2801
2802 wlsw = hotkey_get_wlsw();
2803
2804 /* Sync hw blocking state first if it is hw-blocked */
2805 if (wlsw == TPACPI_RFK_RADIO_OFF)
2806 tpacpi_rfk_update_hwblock_state(true);
2807
2808 /* Sync sw blocking state */
2809 tpacpi_rfk_update_swstate_all();
2810
2811 /* Sync hw blocking state last if it is hw-unblocked */
2812 if (wlsw == TPACPI_RFK_RADIO_ON)
2813 tpacpi_rfk_update_hwblock_state(false);
2814
2815 /* Issue rfkill input event for WLSW switch */
2816 if (!(wlsw < 0)) {
2817 mutex_lock(&tpacpi_inputdev_send_mutex);
2818
2819 input_report_switch(tpacpi_inputdev,
2820 SW_RFKILL_ALL, (wlsw > 0));
2821 input_sync(tpacpi_inputdev);
2822
2823 mutex_unlock(&tpacpi_inputdev_send_mutex);
2824 }
2825
2826 /*
2827 * this can be unconditional, as we will poll state again
2828 * if userspace uses the notify to read data
2829 */
2830 hotkey_radio_sw_notify_change();
2831 }
2832
2833 static void hotkey_exit(void)
2834 {
2835 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2836 mutex_lock(&hotkey_mutex);
2837 hotkey_poll_stop_sync();
2838 mutex_unlock(&hotkey_mutex);
2839 #endif
2840
2841 if (hotkey_dev_attributes)
2842 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2843
2844 kfree(hotkey_keycode_map);
2845
2846 if (tp_features.hotkey) {
2847 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2848 "restoring original hot key mask\n");
2849 /* no short-circuit boolean operator below! */
2850 if ((hotkey_mask_set(hotkey_orig_mask) |
2851 hotkey_status_set(false)) != 0)
2852 printk(TPACPI_ERR
2853 "failed to restore hot key mask "
2854 "to BIOS defaults\n");
2855 }
2856 }
2857
2858 static void __init hotkey_unmap(const unsigned int scancode)
2859 {
2860 if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
2861 clear_bit(hotkey_keycode_map[scancode],
2862 tpacpi_inputdev->keybit);
2863 hotkey_keycode_map[scancode] = KEY_RESERVED;
2864 }
2865 }
2866
2867 static int __init hotkey_init(struct ibm_init_struct *iibm)
2868 {
2869 /* Requirements for changing the default keymaps:
2870 *
2871 * 1. Many of the keys are mapped to KEY_RESERVED for very
2872 * good reasons. Do not change them unless you have deep
2873 * knowledge on the IBM and Lenovo ThinkPad firmware for
2874 * the various ThinkPad models. The driver behaves
2875 * differently for KEY_RESERVED: such keys have their
2876 * hot key mask *unset* in mask_recommended, and also
2877 * in the initial hot key mask programmed into the
2878 * firmware at driver load time, which means the firm-
2879 * ware may react very differently if you change them to
2880 * something else;
2881 *
2882 * 2. You must be subscribed to the linux-thinkpad and
2883 * ibm-acpi-devel mailing lists, and you should read the
2884 * list archives since 2007 if you want to change the
2885 * keymaps. This requirement exists so that you will
2886 * know the past history of problems with the thinkpad-
2887 * acpi driver keymaps, and also that you will be
2888 * listening to any bug reports;
2889 *
2890 * 3. Do not send thinkpad-acpi specific patches directly to
2891 * for merging, *ever*. Send them to the linux-acpi
2892 * mailinglist for comments. Merging is to be done only
2893 * through acpi-test and the ACPI maintainer.
2894 *
2895 * If the above is too much to ask, don't change the keymap.
2896 * Ask the thinkpad-acpi maintainer to do it, instead.
2897 */
2898 static u16 ibm_keycode_map[] __initdata = {
2899 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2900 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2901 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2902 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2903
2904 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2905 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2906 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2907 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2908
2909 /* brightness: firmware always reacts to them, unless
2910 * X.org did some tricks in the radeon BIOS scratch
2911 * registers of *some* models */
2912 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2913 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2914
2915 /* Thinklight: firmware always react to it */
2916 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2917
2918 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2919 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2920
2921 /* Volume: firmware always react to it and reprograms
2922 * the built-in *extra* mixer. Never map it to control
2923 * another mixer by default. */
2924 KEY_RESERVED, /* 0x14: VOLUME UP */
2925 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2926 KEY_RESERVED, /* 0x16: MUTE */
2927
2928 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2929
2930 /* (assignments unknown, please report if found) */
2931 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2932 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2933 };
2934 static u16 lenovo_keycode_map[] __initdata = {
2935 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2936 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2937 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2938 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2939
2940 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2941 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2942 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2943 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2944
2945 /* These should be enabled --only-- when ACPI video
2946 * is disabled (i.e. in "vendor" mode), and are handled
2947 * in a special way by the init code */
2948 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
2949 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
2950
2951 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2952
2953 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2954 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2955
2956 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2957 * react to it and reprograms the built-in *extra* mixer.
2958 * Never map it to control another mixer by default.
2959 *
2960 * T60?, T61, R60?, R61: firmware and EC tries to send
2961 * these over the regular keyboard, so these are no-ops,
2962 * but there are still weird bugs re. MUTE, so do not
2963 * change unless you get test reports from all Lenovo
2964 * models. May cause the BIOS to interfere with the
2965 * HDA mixer.
2966 */
2967 KEY_RESERVED, /* 0x14: VOLUME UP */
2968 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2969 KEY_RESERVED, /* 0x16: MUTE */
2970
2971 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2972
2973 /* (assignments unknown, please report if found) */
2974 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2975 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2976 };
2977
2978 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2979 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2980 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2981
2982 int res, i;
2983 int status;
2984 int hkeyv;
2985
2986 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2987 "initializing hotkey subdriver\n");
2988
2989 BUG_ON(!tpacpi_inputdev);
2990 BUG_ON(tpacpi_inputdev->open != NULL ||
2991 tpacpi_inputdev->close != NULL);
2992
2993 TPACPI_ACPIHANDLE_INIT(hkey);
2994 mutex_init(&hotkey_mutex);
2995
2996 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2997 mutex_init(&hotkey_thread_mutex);
2998 mutex_init(&hotkey_thread_data_mutex);
2999 #endif
3000
3001 /* hotkey not supported on 570 */
3002 tp_features.hotkey = hkey_handle != NULL;
3003
3004 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3005 "hotkeys are %s\n",
3006 str_supported(tp_features.hotkey));
3007
3008 if (!tp_features.hotkey)
3009 return 1;
3010
3011 tpacpi_disable_brightness_delay();
3012
3013 hotkey_dev_attributes = create_attr_set(13, NULL);
3014 if (!hotkey_dev_attributes)
3015 return -ENOMEM;
3016 res = add_many_to_attr_set(hotkey_dev_attributes,
3017 hotkey_attributes,
3018 ARRAY_SIZE(hotkey_attributes));
3019 if (res)
3020 goto err_exit;
3021
3022 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3023 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
3024 for HKEY interface version 0x100 */
3025 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3026 if ((hkeyv >> 8) != 1) {
3027 printk(TPACPI_ERR "unknown version of the "
3028 "HKEY interface: 0x%x\n", hkeyv);
3029 printk(TPACPI_ERR "please report this to %s\n",
3030 TPACPI_MAIL);
3031 } else {
3032 /*
3033 * MHKV 0x100 in A31, R40, R40e,
3034 * T4x, X31, and later
3035 */
3036 tp_features.hotkey_mask = 1;
3037 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3038 "firmware HKEY interface version: 0x%x\n",
3039 hkeyv);
3040 }
3041 }
3042
3043 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3044 "hotkey masks are %s\n",
3045 str_supported(tp_features.hotkey_mask));
3046
3047 if (tp_features.hotkey_mask) {
3048 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3049 "MHKA", "qd")) {
3050 printk(TPACPI_ERR
3051 "missing MHKA handler, "
3052 "please report this to %s\n",
3053 TPACPI_MAIL);
3054 /* FN+F12, FN+F4, FN+F3 */
3055 hotkey_all_mask = 0x080cU;
3056 }
3057 }
3058
3059 /* hotkey_source_mask *must* be zero for
3060 * the first hotkey_mask_get */
3061 if (tp_features.hotkey_mask) {
3062 res = hotkey_mask_get();
3063 if (res)
3064 goto err_exit;
3065
3066 hotkey_orig_mask = hotkey_mask;
3067 res = add_many_to_attr_set(
3068 hotkey_dev_attributes,
3069 hotkey_mask_attributes,
3070 ARRAY_SIZE(hotkey_mask_attributes));
3071 if (res)
3072 goto err_exit;
3073 }
3074
3075 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3076 if (dbg_wlswemul) {
3077 tp_features.hotkey_wlsw = 1;
3078 printk(TPACPI_INFO
3079 "radio switch emulation enabled\n");
3080 } else
3081 #endif
3082 /* Not all thinkpads have a hardware radio switch */
3083 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3084 tp_features.hotkey_wlsw = 1;
3085 printk(TPACPI_INFO
3086 "radio switch found; radios are %s\n",
3087 enabled(status, 0));
3088 }
3089 if (tp_features.hotkey_wlsw)
3090 res = add_to_attr_set(hotkey_dev_attributes,
3091 &dev_attr_hotkey_radio_sw.attr);
3092
3093 /* For X41t, X60t, X61t Tablets... */
3094 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3095 tp_features.hotkey_tablet = 1;
3096 printk(TPACPI_INFO
3097 "possible tablet mode switch found; "
3098 "ThinkPad in %s mode\n",
3099 (status & TP_HOTKEY_TABLET_MASK)?
3100 "tablet" : "laptop");
3101 res = add_to_attr_set(hotkey_dev_attributes,
3102 &dev_attr_hotkey_tablet_mode.attr);
3103 }
3104
3105 if (!res)
3106 res = register_attr_set_with_sysfs(
3107 hotkey_dev_attributes,
3108 &tpacpi_pdev->dev.kobj);
3109 if (res)
3110 goto err_exit;
3111
3112 /* Set up key map */
3113
3114 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3115 GFP_KERNEL);
3116 if (!hotkey_keycode_map) {
3117 printk(TPACPI_ERR
3118 "failed to allocate memory for key map\n");
3119 res = -ENOMEM;
3120 goto err_exit;
3121 }
3122
3123 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3124 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3125 "using Lenovo default hot key map\n");
3126 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3127 TPACPI_HOTKEY_MAP_SIZE);
3128 } else {
3129 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3130 "using IBM default hot key map\n");
3131 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3132 TPACPI_HOTKEY_MAP_SIZE);
3133 }
3134
3135 set_bit(EV_KEY, tpacpi_inputdev->evbit);
3136 set_bit(EV_MSC, tpacpi_inputdev->evbit);
3137 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3138 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3139 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3140 tpacpi_inputdev->keycode = hotkey_keycode_map;
3141 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3142 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3143 set_bit(hotkey_keycode_map[i],
3144 tpacpi_inputdev->keybit);
3145 } else {
3146 if (i < sizeof(hotkey_reserved_mask)*8)
3147 hotkey_reserved_mask |= 1 << i;
3148 }
3149 }
3150
3151 if (tp_features.hotkey_wlsw) {
3152 set_bit(EV_SW, tpacpi_inputdev->evbit);
3153 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3154 }
3155 if (tp_features.hotkey_tablet) {
3156 set_bit(EV_SW, tpacpi_inputdev->evbit);
3157 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3158 }
3159
3160 /* Do not issue duplicate brightness change events to
3161 * userspace */
3162 if (!tp_features.bright_acpimode)
3163 /* update bright_acpimode... */
3164 tpacpi_check_std_acpi_brightness_support();
3165
3166 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3167 printk(TPACPI_INFO
3168 "This ThinkPad has standard ACPI backlight "
3169 "brightness control, supported by the ACPI "
3170 "video driver\n");
3171 printk(TPACPI_NOTICE
3172 "Disabling thinkpad-acpi brightness events "
3173 "by default...\n");
3174
3175 /* Disable brightness up/down on Lenovo thinkpads when
3176 * ACPI is handling them, otherwise it is plain impossible
3177 * for userspace to do something even remotely sane */
3178 hotkey_reserved_mask |=
3179 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3180 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3181 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3182 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3183 }
3184
3185 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3186 if (tp_features.hotkey_mask) {
3187 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3188 & ~hotkey_all_mask
3189 & ~hotkey_reserved_mask;
3190 } else {
3191 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3192 & ~hotkey_reserved_mask;
3193 }
3194
3195 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3196 "hotkey source mask 0x%08x, polling freq %u\n",
3197 hotkey_source_mask, hotkey_poll_freq);
3198 #endif
3199
3200 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3201 "enabling firmware HKEY event interface...\n");
3202 res = hotkey_status_set(true);
3203 if (res) {
3204 hotkey_exit();
3205 return res;
3206 }
3207 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
3208 & ~hotkey_reserved_mask)
3209 | hotkey_orig_mask);
3210 if (res < 0 && res != -ENXIO) {
3211 hotkey_exit();
3212 return res;
3213 }
3214
3215 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3216 "legacy ibm/hotkey event reporting over procfs %s\n",
3217 (hotkey_report_mode < 2) ?
3218 "enabled" : "disabled");
3219
3220 tpacpi_inputdev->open = &hotkey_inputdev_open;
3221 tpacpi_inputdev->close = &hotkey_inputdev_close;
3222
3223 hotkey_poll_setup_safe(true);
3224 tpacpi_send_radiosw_update();
3225 tpacpi_input_send_tabletsw();
3226
3227 return 0;
3228
3229 err_exit:
3230 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3231 hotkey_dev_attributes = NULL;
3232
3233 return (res < 0)? res : 1;
3234 }
3235
3236 static bool hotkey_notify_hotkey(const u32 hkey,
3237 bool *send_acpi_ev,
3238 bool *ignore_acpi_ev)
3239 {
3240 /* 0x1000-0x1FFF: key presses */
3241 unsigned int scancode = hkey & 0xfff;
3242 *send_acpi_ev = true;
3243 *ignore_acpi_ev = false;
3244
3245 if (scancode > 0 && scancode < 0x21) {
3246 scancode--;
3247 if (!(hotkey_source_mask & (1 << scancode))) {
3248 tpacpi_input_send_key(scancode);
3249 *send_acpi_ev = false;
3250 } else {
3251 *ignore_acpi_ev = true;
3252 }
3253 return true;
3254 }
3255 return false;
3256 }
3257
3258 static bool hotkey_notify_wakeup(const u32 hkey,
3259 bool *send_acpi_ev,
3260 bool *ignore_acpi_ev)
3261 {
3262 /* 0x2000-0x2FFF: Wakeup reason */
3263 *send_acpi_ev = true;
3264 *ignore_acpi_ev = false;
3265
3266 switch (hkey) {
3267 case 0x2304: /* suspend, undock */
3268 case 0x2404: /* hibernation, undock */
3269 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3270 *ignore_acpi_ev = true;
3271 break;
3272
3273 case 0x2305: /* suspend, bay eject */
3274 case 0x2405: /* hibernation, bay eject */
3275 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3276 *ignore_acpi_ev = true;
3277 break;
3278
3279 case 0x2313: /* Battery on critical low level (S3) */
3280 case 0x2413: /* Battery on critical low level (S4) */
3281 printk(TPACPI_ALERT
3282 "EMERGENCY WAKEUP: battery almost empty\n");
3283 /* how to auto-heal: */
3284 /* 2313: woke up from S3, go to S4/S5 */
3285 /* 2413: woke up from S4, go to S5 */
3286 break;
3287
3288 default:
3289 return false;
3290 }
3291
3292 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3293 printk(TPACPI_INFO
3294 "woke up due to a hot-unplug "
3295 "request...\n");
3296 hotkey_wakeup_reason_notify_change();
3297 }
3298 return true;
3299 }
3300
3301 static bool hotkey_notify_usrevent(const u32 hkey,
3302 bool *send_acpi_ev,
3303 bool *ignore_acpi_ev)
3304 {
3305 /* 0x5000-0x5FFF: human interface helpers */
3306 *send_acpi_ev = true;
3307 *ignore_acpi_ev = false;
3308
3309 switch (hkey) {
3310 case 0x5010: /* Lenovo new BIOS: brightness changed */
3311 case 0x500b: /* X61t: tablet pen inserted into bay */
3312 case 0x500c: /* X61t: tablet pen removed from bay */
3313 return true;
3314
3315 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3316 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3317 tpacpi_input_send_tabletsw();
3318 hotkey_tablet_mode_notify_change();
3319 *send_acpi_ev = false;
3320 return true;
3321
3322 case 0x5001:
3323 case 0x5002:
3324 /* LID switch events. Do not propagate */
3325 *ignore_acpi_ev = true;
3326 return true;
3327
3328 default:
3329 return false;
3330 }
3331 }
3332
3333 static bool hotkey_notify_thermal(const u32 hkey,
3334 bool *send_acpi_ev,
3335 bool *ignore_acpi_ev)
3336 {
3337 /* 0x6000-0x6FFF: thermal alarms */
3338 *send_acpi_ev = true;
3339 *ignore_acpi_ev = false;
3340
3341 switch (hkey) {
3342 case 0x6011:
3343 printk(TPACPI_CRIT
3344 "THERMAL ALARM: battery is too hot!\n");
3345 /* recommended action: warn user through gui */
3346 return true;
3347 case 0x6012:
3348 printk(TPACPI_ALERT
3349 "THERMAL EMERGENCY: battery is extremely hot!\n");
3350 /* recommended action: immediate sleep/hibernate */
3351 return true;
3352 case 0x6021:
3353 printk(TPACPI_CRIT
3354 "THERMAL ALARM: "
3355 "a sensor reports something is too hot!\n");
3356 /* recommended action: warn user through gui, that */
3357 /* some internal component is too hot */
3358 return true;
3359 case 0x6022:
3360 printk(TPACPI_ALERT
3361 "THERMAL EMERGENCY: "
3362 "a sensor reports something is extremely hot!\n");
3363 /* recommended action: immediate sleep/hibernate */
3364 return true;
3365 case 0x6030:
3366 printk(TPACPI_INFO
3367 "EC reports that Thermal Table has changed\n");
3368 /* recommended action: do nothing, we don't have
3369 * Lenovo ATM information */
3370 return true;
3371 default:
3372 printk(TPACPI_ALERT
3373 "THERMAL ALERT: unknown thermal alarm received\n");
3374 return false;
3375 }
3376 }
3377
3378 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3379 {
3380 u32 hkey;
3381 bool send_acpi_ev;
3382 bool ignore_acpi_ev;
3383 bool known_ev;
3384
3385 if (event != 0x80) {
3386 printk(TPACPI_ERR
3387 "unknown HKEY notification event %d\n", event);
3388 /* forward it to userspace, maybe it knows how to handle it */
3389 acpi_bus_generate_netlink_event(
3390 ibm->acpi->device->pnp.device_class,
3391 dev_name(&ibm->acpi->device->dev),
3392 event, 0);
3393 return;
3394 }
3395
3396 while (1) {
3397 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3398 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3399 return;
3400 }
3401
3402 if (hkey == 0) {
3403 /* queue empty */
3404 return;
3405 }
3406
3407 send_acpi_ev = true;
3408 ignore_acpi_ev = false;
3409
3410 switch (hkey >> 12) {
3411 case 1:
3412 /* 0x1000-0x1FFF: key presses */
3413 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3414 &ignore_acpi_ev);
3415 break;
3416 case 2:
3417 /* 0x2000-0x2FFF: Wakeup reason */
3418 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3419 &ignore_acpi_ev);
3420 break;
3421 case 3:
3422 /* 0x3000-0x3FFF: bay-related wakeups */
3423 if (hkey == 0x3003) {
3424 hotkey_autosleep_ack = 1;
3425 printk(TPACPI_INFO
3426 "bay ejected\n");
3427 hotkey_wakeup_hotunplug_complete_notify_change();
3428 known_ev = true;
3429 } else {
3430 known_ev = false;
3431 }
3432 break;
3433 case 4:
3434 /* 0x4000-0x4FFF: dock-related wakeups */
3435 if (hkey == 0x4003) {
3436 hotkey_autosleep_ack = 1;
3437 printk(TPACPI_INFO
3438 "undocked\n");
3439 hotkey_wakeup_hotunplug_complete_notify_change();
3440 known_ev = true;
3441 } else {
3442 known_ev = false;
3443 }
3444 break;
3445 case 5:
3446 /* 0x5000-0x5FFF: human interface helpers */
3447 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3448 &ignore_acpi_ev);
3449 break;
3450 case 6:
3451 /* 0x6000-0x6FFF: thermal alarms */
3452 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3453 &ignore_acpi_ev);
3454 break;
3455 case 7:
3456 /* 0x7000-0x7FFF: misc */
3457 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3458 tpacpi_send_radiosw_update();
3459 send_acpi_ev = 0;
3460 known_ev = true;
3461 break;
3462 }
3463 /* fallthrough to default */
3464 default:
3465 known_ev = false;
3466 }
3467 if (!known_ev) {
3468 printk(TPACPI_NOTICE
3469 "unhandled HKEY event 0x%04x\n", hkey);
3470 printk(TPACPI_NOTICE
3471 "please report the conditions when this "
3472 "event happened to %s\n", TPACPI_MAIL);
3473 }
3474
3475 /* Legacy events */
3476 if (!ignore_acpi_ev &&
3477 (send_acpi_ev || hotkey_report_mode < 2)) {
3478 acpi_bus_generate_proc_event(ibm->acpi->device,
3479 event, hkey);
3480 }
3481
3482 /* netlink events */
3483 if (!ignore_acpi_ev && send_acpi_ev) {
3484 acpi_bus_generate_netlink_event(
3485 ibm->acpi->device->pnp.device_class,
3486 dev_name(&ibm->acpi->device->dev),
3487 event, hkey);
3488 }
3489 }
3490 }
3491
3492 static void hotkey_suspend(pm_message_t state)
3493 {
3494 /* Do these on suspend, we get the events on early resume! */
3495 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3496 hotkey_autosleep_ack = 0;
3497 }
3498
3499 static void hotkey_resume(void)
3500 {
3501 tpacpi_disable_brightness_delay();
3502
3503 if (hotkey_mask_get())
3504 printk(TPACPI_ERR
3505 "error while trying to read hot key mask "
3506 "from firmware\n");
3507 tpacpi_send_radiosw_update();
3508 hotkey_tablet_mode_notify_change();
3509 hotkey_wakeup_reason_notify_change();
3510 hotkey_wakeup_hotunplug_complete_notify_change();
3511 hotkey_poll_setup_safe(false);
3512 }
3513
3514 /* procfs -------------------------------------------------------------- */
3515 static int hotkey_read(char *p)
3516 {
3517 int res, status;
3518 int len = 0;
3519
3520 if (!tp_features.hotkey) {
3521 len += sprintf(p + len, "status:\t\tnot supported\n");
3522 return len;
3523 }
3524
3525 if (mutex_lock_killable(&hotkey_mutex))
3526 return -ERESTARTSYS;
3527 res = hotkey_status_get(&status);
3528 if (!res)
3529 res = hotkey_mask_get();
3530 mutex_unlock(&hotkey_mutex);
3531 if (res)
3532 return res;
3533
3534 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3535 if (tp_features.hotkey_mask) {
3536 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3537 len += sprintf(p + len,
3538 "commands:\tenable, disable, reset, <mask>\n");
3539 } else {
3540 len += sprintf(p + len, "mask:\t\tnot supported\n");
3541 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3542 }
3543
3544 return len;
3545 }
3546
3547 static void hotkey_enabledisable_warn(bool enable)
3548 {
3549 tpacpi_log_usertask("procfs hotkey enable/disable");
3550 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3551 TPACPI_WARN
3552 "hotkey enable/disable functionality has been "
3553 "removed from the driver. Hotkeys are always "
3554 "enabled\n"))
3555 printk(TPACPI_ERR
3556 "Please remove the hotkey=enable module "
3557 "parameter, it is deprecated. Hotkeys are always "
3558 "enabled\n");
3559 }
3560
3561 static int hotkey_write(char *buf)
3562 {
3563 int res;
3564 u32 mask;
3565 char *cmd;
3566
3567 if (!tp_features.hotkey)
3568 return -ENODEV;
3569
3570 if (mutex_lock_killable(&hotkey_mutex))
3571 return -ERESTARTSYS;
3572
3573 mask = hotkey_mask;
3574
3575 res = 0;
3576 while ((cmd = next_cmd(&buf))) {
3577 if (strlencmp(cmd, "enable") == 0) {
3578 hotkey_enabledisable_warn(1);
3579 } else if (strlencmp(cmd, "disable") == 0) {
3580 hotkey_enabledisable_warn(0);
3581 res = -EPERM;
3582 } else if (strlencmp(cmd, "reset") == 0) {
3583 mask = (hotkey_all_mask | hotkey_source_mask)
3584 & ~hotkey_reserved_mask;
3585 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3586 /* mask set */
3587 } else if (sscanf(cmd, "%x", &mask) == 1) {
3588 /* mask set */
3589 } else {
3590 res = -EINVAL;
3591 goto errexit;
3592 }
3593 }
3594
3595 if (!res)
3596 tpacpi_disclose_usertask("procfs hotkey",
3597 "set mask to 0x%08x\n", mask);
3598
3599 if (!res && mask != hotkey_mask)
3600 res = hotkey_mask_set(mask);
3601
3602 errexit:
3603 mutex_unlock(&hotkey_mutex);
3604 return res;
3605 }
3606
3607 static const struct acpi_device_id ibm_htk_device_ids[] = {
3608 {TPACPI_ACPI_HKEY_HID, 0},
3609 {"", 0},
3610 };
3611
3612 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3613 .hid = ibm_htk_device_ids,
3614 .notify = hotkey_notify,
3615 .handle = &hkey_handle,
3616 .type = ACPI_DEVICE_NOTIFY,
3617 };
3618
3619 static struct ibm_struct hotkey_driver_data = {
3620 .name = "hotkey",
3621 .read = hotkey_read,
3622 .write = hotkey_write,
3623 .exit = hotkey_exit,
3624 .resume = hotkey_resume,
3625 .suspend = hotkey_suspend,
3626 .acpi = &ibm_hotkey_acpidriver,
3627 };
3628
3629 /*************************************************************************
3630 * Bluetooth subdriver
3631 */
3632
3633 enum {
3634 /* ACPI GBDC/SBDC bits */
3635 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3636 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3637 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3638 off / last state */
3639 };
3640
3641 enum {
3642 /* ACPI \BLTH commands */
3643 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3644 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3645 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3646 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3647 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3648 };
3649
3650 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3651
3652 static void bluetooth_suspend(pm_message_t state)
3653 {
3654 /* Try to make sure radio will resume powered off */
3655 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3656 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3657 vdbg_printk(TPACPI_DBG_RFKILL,
3658 "bluetooth power down on resume request failed\n");
3659 }
3660
3661 static int bluetooth_get_status(void)
3662 {
3663 int status;
3664
3665 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3666 if (dbg_bluetoothemul)
3667 return (tpacpi_bluetooth_emulstate) ?
3668 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3669 #endif
3670
3671 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3672 return -EIO;
3673
3674 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3675 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3676 }
3677
3678 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3679 {
3680 int status;
3681
3682 vdbg_printk(TPACPI_DBG_RFKILL,
3683 "will attempt to %s bluetooth\n",
3684 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3685
3686 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3687 if (dbg_bluetoothemul) {
3688 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3689 return 0;
3690 }
3691 #endif
3692
3693 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3694 if (state == TPACPI_RFK_RADIO_ON)
3695 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3696 else
3697 status = 0;
3698
3699 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3700 return -EIO;
3701
3702 return 0;
3703 }
3704
3705 /* sysfs bluetooth enable ---------------------------------------------- */
3706 static ssize_t bluetooth_enable_show(struct device *dev,
3707 struct device_attribute *attr,
3708 char *buf)
3709 {
3710 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3711 attr, buf);
3712 }
3713
3714 static ssize_t bluetooth_enable_store(struct device *dev,
3715 struct device_attribute *attr,
3716 const char *buf, size_t count)
3717 {
3718 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3719 attr, buf, count);
3720 }
3721
3722 static struct device_attribute dev_attr_bluetooth_enable =
3723 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3724 bluetooth_enable_show, bluetooth_enable_store);
3725
3726 /* --------------------------------------------------------------------- */
3727
3728 static struct attribute *bluetooth_attributes[] = {
3729 &dev_attr_bluetooth_enable.attr,
3730 NULL
3731 };
3732
3733 static const struct attribute_group bluetooth_attr_group = {
3734 .attrs = bluetooth_attributes,
3735 };
3736
3737 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3738 .get_status = bluetooth_get_status,
3739 .set_status = bluetooth_set_status,
3740 };
3741
3742 static void bluetooth_shutdown(void)
3743 {
3744 /* Order firmware to save current state to NVRAM */
3745 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3746 TP_ACPI_BLTH_SAVE_STATE))
3747 printk(TPACPI_NOTICE
3748 "failed to save bluetooth state to NVRAM\n");
3749 else
3750 vdbg_printk(TPACPI_DBG_RFKILL,
3751 "bluestooth state saved to NVRAM\n");
3752 }
3753
3754 static void bluetooth_exit(void)
3755 {
3756 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3757 &bluetooth_attr_group);
3758
3759 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3760
3761 bluetooth_shutdown();
3762 }
3763
3764 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3765 {
3766 int res;
3767 int status = 0;
3768
3769 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3770 "initializing bluetooth subdriver\n");
3771
3772 TPACPI_ACPIHANDLE_INIT(hkey);
3773
3774 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3775 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3776 tp_features.bluetooth = hkey_handle &&
3777 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3778
3779 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3780 "bluetooth is %s, status 0x%02x\n",
3781 str_supported(tp_features.bluetooth),
3782 status);
3783
3784 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3785 if (dbg_bluetoothemul) {
3786 tp_features.bluetooth = 1;
3787 printk(TPACPI_INFO
3788 "bluetooth switch emulation enabled\n");
3789 } else
3790 #endif
3791 if (tp_features.bluetooth &&
3792 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3793 /* no bluetooth hardware present in system */
3794 tp_features.bluetooth = 0;
3795 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3796 "bluetooth hardware not installed\n");
3797 }
3798
3799 if (!tp_features.bluetooth)
3800 return 1;
3801
3802 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3803 &bluetooth_tprfk_ops,
3804 RFKILL_TYPE_BLUETOOTH,
3805 TPACPI_RFK_BLUETOOTH_SW_NAME,
3806 true);
3807 if (res)
3808 return res;
3809
3810 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3811 &bluetooth_attr_group);
3812 if (res) {
3813 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3814 return res;
3815 }
3816
3817 return 0;
3818 }
3819
3820 /* procfs -------------------------------------------------------------- */
3821 static int bluetooth_read(char *p)
3822 {
3823 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3824 }
3825
3826 static int bluetooth_write(char *buf)
3827 {
3828 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3829 }
3830
3831 static struct ibm_struct bluetooth_driver_data = {
3832 .name = "bluetooth",
3833 .read = bluetooth_read,
3834 .write = bluetooth_write,
3835 .exit = bluetooth_exit,
3836 .suspend = bluetooth_suspend,
3837 .shutdown = bluetooth_shutdown,
3838 };
3839
3840 /*************************************************************************
3841 * Wan subdriver
3842 */
3843
3844 enum {
3845 /* ACPI GWAN/SWAN bits */
3846 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3847 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3848 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3849 off / last state */
3850 };
3851
3852 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3853
3854 static void wan_suspend(pm_message_t state)
3855 {
3856 /* Try to make sure radio will resume powered off */
3857 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3858 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3859 vdbg_printk(TPACPI_DBG_RFKILL,
3860 "WWAN power down on resume request failed\n");
3861 }
3862
3863 static int wan_get_status(void)
3864 {
3865 int status;
3866
3867 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3868 if (dbg_wwanemul)
3869 return (tpacpi_wwan_emulstate) ?
3870 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3871 #endif
3872
3873 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3874 return -EIO;
3875
3876 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3877 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3878 }
3879
3880 static int wan_set_status(enum tpacpi_rfkill_state state)
3881 {
3882 int status;
3883
3884 vdbg_printk(TPACPI_DBG_RFKILL,
3885 "will attempt to %s wwan\n",
3886 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3887
3888 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3889 if (dbg_wwanemul) {
3890 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3891 return 0;
3892 }
3893 #endif
3894
3895 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3896 if (state == TPACPI_RFK_RADIO_ON)
3897 status = TP_ACPI_WANCARD_RADIOSSW;
3898 else
3899 status = 0;
3900
3901 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3902 return -EIO;
3903
3904 return 0;
3905 }
3906
3907 /* sysfs wan enable ---------------------------------------------------- */
3908 static ssize_t wan_enable_show(struct device *dev,
3909 struct device_attribute *attr,
3910 char *buf)
3911 {
3912 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3913 attr, buf);
3914 }
3915
3916 static ssize_t wan_enable_store(struct device *dev,
3917 struct device_attribute *attr,
3918 const char *buf, size_t count)
3919 {
3920 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3921 attr, buf, count);
3922 }
3923
3924 static struct device_attribute dev_attr_wan_enable =
3925 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3926 wan_enable_show, wan_enable_store);
3927
3928 /* --------------------------------------------------------------------- */
3929
3930 static struct attribute *wan_attributes[] = {
3931 &dev_attr_wan_enable.attr,
3932 NULL
3933 };
3934
3935 static const struct attribute_group wan_attr_group = {
3936 .attrs = wan_attributes,
3937 };
3938
3939 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3940 .get_status = wan_get_status,
3941 .set_status = wan_set_status,
3942 };
3943
3944 static void wan_shutdown(void)
3945 {
3946 /* Order firmware to save current state to NVRAM */
3947 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3948 TP_ACPI_WGSV_SAVE_STATE))
3949 printk(TPACPI_NOTICE
3950 "failed to save WWAN state to NVRAM\n");
3951 else
3952 vdbg_printk(TPACPI_DBG_RFKILL,
3953 "WWAN state saved to NVRAM\n");
3954 }
3955
3956 static void wan_exit(void)
3957 {
3958 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3959 &wan_attr_group);
3960
3961 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3962
3963 wan_shutdown();
3964 }
3965
3966 static int __init wan_init(struct ibm_init_struct *iibm)
3967 {
3968 int res;
3969 int status = 0;
3970
3971 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3972 "initializing wan subdriver\n");
3973
3974 TPACPI_ACPIHANDLE_INIT(hkey);
3975
3976 tp_features.wan = hkey_handle &&
3977 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3978
3979 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3980 "wan is %s, status 0x%02x\n",
3981 str_supported(tp_features.wan),
3982 status);
3983
3984 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3985 if (dbg_wwanemul) {
3986 tp_features.wan = 1;
3987 printk(TPACPI_INFO
3988 "wwan switch emulation enabled\n");
3989 } else
3990 #endif
3991 if (tp_features.wan &&
3992 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3993 /* no wan hardware present in system */
3994 tp_features.wan = 0;
3995 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3996 "wan hardware not installed\n");
3997 }
3998
3999 if (!tp_features.wan)
4000 return 1;
4001
4002 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4003 &wan_tprfk_ops,
4004 RFKILL_TYPE_WWAN,
4005 TPACPI_RFK_WWAN_SW_NAME,
4006 true);
4007 if (res)
4008 return res;
4009
4010 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4011 &wan_attr_group);
4012
4013 if (res) {
4014 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4015 return res;
4016 }
4017
4018 return 0;
4019 }
4020
4021 /* procfs -------------------------------------------------------------- */
4022 static int wan_read(char *p)
4023 {
4024 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4025 }
4026
4027 static int wan_write(char *buf)
4028 {
4029 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4030 }
4031
4032 static struct ibm_struct wan_driver_data = {
4033 .name = "wan",
4034 .read = wan_read,
4035 .write = wan_write,
4036 .exit = wan_exit,
4037 .suspend = wan_suspend,
4038 .shutdown = wan_shutdown,
4039 };
4040
4041 /*************************************************************************
4042 * UWB subdriver
4043 */
4044
4045 enum {
4046 /* ACPI GUWB/SUWB bits */
4047 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
4048 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
4049 };
4050
4051 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4052
4053 static int uwb_get_status(void)
4054 {
4055 int status;
4056
4057 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4058 if (dbg_uwbemul)
4059 return (tpacpi_uwb_emulstate) ?
4060 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4061 #endif
4062
4063 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4064 return -EIO;
4065
4066 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4067 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4068 }
4069
4070 static int uwb_set_status(enum tpacpi_rfkill_state state)
4071 {
4072 int status;
4073
4074 vdbg_printk(TPACPI_DBG_RFKILL,
4075 "will attempt to %s UWB\n",
4076 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4077
4078 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4079 if (dbg_uwbemul) {
4080 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4081 return 0;
4082 }
4083 #endif
4084
4085 if (state == TPACPI_RFK_RADIO_ON)
4086 status = TP_ACPI_UWB_RADIOSSW;
4087 else
4088 status = 0;
4089
4090 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4091 return -EIO;
4092
4093 return 0;
4094 }
4095
4096 /* --------------------------------------------------------------------- */
4097
4098 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4099 .get_status = uwb_get_status,
4100 .set_status = uwb_set_status,
4101 };
4102
4103 static void uwb_exit(void)
4104 {
4105 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4106 }
4107
4108 static int __init uwb_init(struct ibm_init_struct *iibm)
4109 {
4110 int res;
4111 int status = 0;
4112
4113 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4114 "initializing uwb subdriver\n");
4115
4116 TPACPI_ACPIHANDLE_INIT(hkey);
4117
4118 tp_features.uwb = hkey_handle &&
4119 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4120
4121 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4122 "uwb is %s, status 0x%02x\n",
4123 str_supported(tp_features.uwb),
4124 status);
4125
4126 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4127 if (dbg_uwbemul) {
4128 tp_features.uwb = 1;
4129 printk(TPACPI_INFO
4130 "uwb switch emulation enabled\n");
4131 } else
4132 #endif
4133 if (tp_features.uwb &&
4134 !(status & TP_ACPI_UWB_HWPRESENT)) {
4135 /* no uwb hardware present in system */
4136 tp_features.uwb = 0;
4137 dbg_printk(TPACPI_DBG_INIT,
4138 "uwb hardware not installed\n");
4139 }
4140
4141 if (!tp_features.uwb)
4142 return 1;
4143
4144 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4145 &uwb_tprfk_ops,
4146 RFKILL_TYPE_UWB,
4147 TPACPI_RFK_UWB_SW_NAME,
4148 false);
4149 return res;
4150 }
4151
4152 static struct ibm_struct uwb_driver_data = {
4153 .name = "uwb",
4154 .exit = uwb_exit,
4155 .flags.experimental = 1,
4156 };
4157
4158 /*************************************************************************
4159 * Video subdriver
4160 */
4161
4162 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4163
4164 enum video_access_mode {
4165 TPACPI_VIDEO_NONE = 0,
4166 TPACPI_VIDEO_570, /* 570 */
4167 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4168 TPACPI_VIDEO_NEW, /* all others */
4169 };
4170
4171 enum { /* video status flags, based on VIDEO_570 */
4172 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4173 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4174 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4175 };
4176
4177 enum { /* TPACPI_VIDEO_570 constants */
4178 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4179 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4180 * video_status_flags */
4181 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4182 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4183 };
4184
4185 static enum video_access_mode video_supported;
4186 static int video_orig_autosw;
4187
4188 static int video_autosw_get(void);
4189 static int video_autosw_set(int enable);
4190
4191 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4192
4193 static int __init video_init(struct ibm_init_struct *iibm)
4194 {
4195 int ivga;
4196
4197 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4198
4199 TPACPI_ACPIHANDLE_INIT(vid);
4200 TPACPI_ACPIHANDLE_INIT(vid2);
4201
4202 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4203 /* G41, assume IVGA doesn't change */
4204 vid_handle = vid2_handle;
4205
4206 if (!vid_handle)
4207 /* video switching not supported on R30, R31 */
4208 video_supported = TPACPI_VIDEO_NONE;
4209 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4210 /* 570 */
4211 video_supported = TPACPI_VIDEO_570;
4212 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4213 /* 600e/x, 770e, 770x */
4214 video_supported = TPACPI_VIDEO_770;
4215 else
4216 /* all others */
4217 video_supported = TPACPI_VIDEO_NEW;
4218
4219 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4220 str_supported(video_supported != TPACPI_VIDEO_NONE),
4221 video_supported);
4222
4223 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4224 }
4225
4226 static void video_exit(void)
4227 {
4228 dbg_printk(TPACPI_DBG_EXIT,
4229 "restoring original video autoswitch mode\n");
4230 if (video_autosw_set(video_orig_autosw))
4231 printk(TPACPI_ERR "error while trying to restore original "
4232 "video autoswitch mode\n");
4233 }
4234
4235 static int video_outputsw_get(void)
4236 {
4237 int status = 0;
4238 int i;
4239
4240 switch (video_supported) {
4241 case TPACPI_VIDEO_570:
4242 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4243 TP_ACPI_VIDEO_570_PHSCMD))
4244 return -EIO;
4245 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4246 break;
4247 case TPACPI_VIDEO_770:
4248 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4249 return -EIO;
4250 if (i)
4251 status |= TP_ACPI_VIDEO_S_LCD;
4252 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4253 return -EIO;
4254 if (i)
4255 status |= TP_ACPI_VIDEO_S_CRT;
4256 break;
4257 case TPACPI_VIDEO_NEW:
4258 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4259 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4260 return -EIO;
4261 if (i)
4262 status |= TP_ACPI_VIDEO_S_CRT;
4263
4264 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4265 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4266 return -EIO;
4267 if (i)
4268 status |= TP_ACPI_VIDEO_S_LCD;
4269 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4270 return -EIO;
4271 if (i)
4272 status |= TP_ACPI_VIDEO_S_DVI;
4273 break;
4274 default:
4275 return -ENOSYS;
4276 }
4277
4278 return status;
4279 }
4280
4281 static int video_outputsw_set(int status)
4282 {
4283 int autosw;
4284 int res = 0;
4285
4286 switch (video_supported) {
4287 case TPACPI_VIDEO_570:
4288 res = acpi_evalf(NULL, NULL,
4289 "\\_SB.PHS2", "vdd",
4290 TP_ACPI_VIDEO_570_PHS2CMD,
4291 status | TP_ACPI_VIDEO_570_PHS2SET);
4292 break;
4293 case TPACPI_VIDEO_770:
4294 autosw = video_autosw_get();
4295 if (autosw < 0)
4296 return autosw;
4297
4298 res = video_autosw_set(1);
4299 if (res)
4300 return res;
4301 res = acpi_evalf(vid_handle, NULL,
4302 "ASWT", "vdd", status * 0x100, 0);
4303 if (!autosw && video_autosw_set(autosw)) {
4304 printk(TPACPI_ERR
4305 "video auto-switch left enabled due to error\n");
4306 return -EIO;
4307 }
4308 break;
4309 case TPACPI_VIDEO_NEW:
4310 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4311 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4312 break;
4313 default:
4314 return -ENOSYS;
4315 }
4316
4317 return (res)? 0 : -EIO;
4318 }
4319
4320 static int video_autosw_get(void)
4321 {
4322 int autosw = 0;
4323
4324 switch (video_supported) {
4325 case TPACPI_VIDEO_570:
4326 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4327 return -EIO;
4328 break;
4329 case TPACPI_VIDEO_770:
4330 case TPACPI_VIDEO_NEW:
4331 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4332 return -EIO;
4333 break;
4334 default:
4335 return -ENOSYS;
4336 }
4337
4338 return autosw & 1;
4339 }
4340
4341 static int video_autosw_set(int enable)
4342 {
4343 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4344 return -EIO;
4345 return 0;
4346 }
4347
4348 static int video_outputsw_cycle(void)
4349 {
4350 int autosw = video_autosw_get();
4351 int res;
4352
4353 if (autosw < 0)
4354 return autosw;
4355
4356 switch (video_supported) {
4357 case TPACPI_VIDEO_570:
4358 res = video_autosw_set(1);
4359 if (res)
4360 return res;
4361 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4362 break;
4363 case TPACPI_VIDEO_770:
4364 case TPACPI_VIDEO_NEW:
4365 res = video_autosw_set(1);
4366 if (res)
4367 return res;
4368 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4369 break;
4370 default:
4371 return -ENOSYS;
4372 }
4373 if (!autosw && video_autosw_set(autosw)) {
4374 printk(TPACPI_ERR
4375 "video auto-switch left enabled due to error\n");
4376 return -EIO;
4377 }
4378
4379 return (res)? 0 : -EIO;
4380 }
4381
4382 static int video_expand_toggle(void)
4383 {
4384 switch (video_supported) {
4385 case TPACPI_VIDEO_570:
4386 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4387 0 : -EIO;
4388 case TPACPI_VIDEO_770:
4389 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4390 0 : -EIO;
4391 case TPACPI_VIDEO_NEW:
4392 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4393 0 : -EIO;
4394 default:
4395 return -ENOSYS;
4396 }
4397 /* not reached */
4398 }
4399
4400 static int video_read(char *p)
4401 {
4402 int status, autosw;
4403 int len = 0;
4404
4405 if (video_supported == TPACPI_VIDEO_NONE) {
4406 len += sprintf(p + len, "status:\t\tnot supported\n");
4407 return len;
4408 }
4409
4410 status = video_outputsw_get();
4411 if (status < 0)
4412 return status;
4413
4414 autosw = video_autosw_get();
4415 if (autosw < 0)
4416 return autosw;
4417
4418 len += sprintf(p + len, "status:\t\tsupported\n");
4419 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4420 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4421 if (video_supported == TPACPI_VIDEO_NEW)
4422 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4423 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4424 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4425 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4426 if (video_supported == TPACPI_VIDEO_NEW)
4427 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4428 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4429 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4430
4431 return len;
4432 }
4433
4434 static int video_write(char *buf)
4435 {
4436 char *cmd;
4437 int enable, disable, status;
4438 int res;
4439
4440 if (video_supported == TPACPI_VIDEO_NONE)
4441 return -ENODEV;
4442
4443 enable = 0;
4444 disable = 0;
4445
4446 while ((cmd = next_cmd(&buf))) {
4447 if (strlencmp(cmd, "lcd_enable") == 0) {
4448 enable |= TP_ACPI_VIDEO_S_LCD;
4449 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4450 disable |= TP_ACPI_VIDEO_S_LCD;
4451 } else if (strlencmp(cmd, "crt_enable") == 0) {
4452 enable |= TP_ACPI_VIDEO_S_CRT;
4453 } else if (strlencmp(cmd, "crt_disable") == 0) {
4454 disable |= TP_ACPI_VIDEO_S_CRT;
4455 } else if (video_supported == TPACPI_VIDEO_NEW &&
4456 strlencmp(cmd, "dvi_enable") == 0) {
4457 enable |= TP_ACPI_VIDEO_S_DVI;
4458 } else if (video_supported == TPACPI_VIDEO_NEW &&
4459 strlencmp(cmd, "dvi_disable") == 0) {
4460 disable |= TP_ACPI_VIDEO_S_DVI;
4461 } else if (strlencmp(cmd, "auto_enable") == 0) {
4462 res = video_autosw_set(1);
4463 if (res)
4464 return res;
4465 } else if (strlencmp(cmd, "auto_disable") == 0) {
4466 res = video_autosw_set(0);
4467 if (res)
4468 return res;
4469 } else if (strlencmp(cmd, "video_switch") == 0) {
4470 res = video_outputsw_cycle();
4471 if (res)
4472 return res;
4473 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4474 res = video_expand_toggle();
4475 if (res)
4476 return res;
4477 } else
4478 return -EINVAL;
4479 }
4480
4481 if (enable || disable) {
4482 status = video_outputsw_get();
4483 if (status < 0)
4484 return status;
4485 res = video_outputsw_set((status & ~disable) | enable);
4486 if (res)
4487 return res;
4488 }
4489
4490 return 0;
4491 }
4492
4493 static struct ibm_struct video_driver_data = {
4494 .name = "video",
4495 .read = video_read,
4496 .write = video_write,
4497 .exit = video_exit,
4498 };
4499
4500 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4501
4502 /*************************************************************************
4503 * Light (thinklight) subdriver
4504 */
4505
4506 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4507 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4508
4509 static int light_get_status(void)
4510 {
4511 int status = 0;
4512
4513 if (tp_features.light_status) {
4514 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4515 return -EIO;
4516 return (!!status);
4517 }
4518
4519 return -ENXIO;
4520 }
4521
4522 static int light_set_status(int status)
4523 {
4524 int rc;
4525
4526 if (tp_features.light) {
4527 if (cmos_handle) {
4528 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4529 (status)?
4530 TP_CMOS_THINKLIGHT_ON :
4531 TP_CMOS_THINKLIGHT_OFF);
4532 } else {
4533 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4534 (status)? 1 : 0);
4535 }
4536 return (rc)? 0 : -EIO;
4537 }
4538
4539 return -ENXIO;
4540 }
4541
4542 static void light_set_status_worker(struct work_struct *work)
4543 {
4544 struct tpacpi_led_classdev *data =
4545 container_of(work, struct tpacpi_led_classdev, work);
4546
4547 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4548 light_set_status((data->new_state != TPACPI_LED_OFF));
4549 }
4550
4551 static void light_sysfs_set(struct led_classdev *led_cdev,
4552 enum led_brightness brightness)
4553 {
4554 struct tpacpi_led_classdev *data =
4555 container_of(led_cdev,
4556 struct tpacpi_led_classdev,
4557 led_classdev);
4558 data->new_state = (brightness != LED_OFF) ?
4559 TPACPI_LED_ON : TPACPI_LED_OFF;
4560 queue_work(tpacpi_wq, &data->work);
4561 }
4562
4563 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4564 {
4565 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4566 }
4567
4568 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4569 .led_classdev = {
4570 .name = "tpacpi::thinklight",
4571 .brightness_set = &light_sysfs_set,
4572 .brightness_get = &light_sysfs_get,
4573 }
4574 };
4575
4576 static int __init light_init(struct ibm_init_struct *iibm)
4577 {
4578 int rc;
4579
4580 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4581
4582 TPACPI_ACPIHANDLE_INIT(ledb);
4583 TPACPI_ACPIHANDLE_INIT(lght);
4584 TPACPI_ACPIHANDLE_INIT(cmos);
4585 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4586
4587 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4588 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4589
4590 if (tp_features.light)
4591 /* light status not supported on
4592 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4593 tp_features.light_status =
4594 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4595
4596 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4597 str_supported(tp_features.light),
4598 str_supported(tp_features.light_status));
4599
4600 if (!tp_features.light)
4601 return 1;
4602
4603 rc = led_classdev_register(&tpacpi_pdev->dev,
4604 &tpacpi_led_thinklight.led_classdev);
4605
4606 if (rc < 0) {
4607 tp_features.light = 0;
4608 tp_features.light_status = 0;
4609 } else {
4610 rc = 0;
4611 }
4612
4613 return rc;
4614 }
4615
4616 static void light_exit(void)
4617 {
4618 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4619 if (work_pending(&tpacpi_led_thinklight.work))
4620 flush_workqueue(tpacpi_wq);
4621 }
4622
4623 static int light_read(char *p)
4624 {
4625 int len = 0;
4626 int status;
4627
4628 if (!tp_features.light) {
4629 len += sprintf(p + len, "status:\t\tnot supported\n");
4630 } else if (!tp_features.light_status) {
4631 len += sprintf(p + len, "status:\t\tunknown\n");
4632 len += sprintf(p + len, "commands:\ton, off\n");
4633 } else {
4634 status = light_get_status();
4635 if (status < 0)
4636 return status;
4637 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4638 len += sprintf(p + len, "commands:\ton, off\n");
4639 }
4640
4641 return len;
4642 }
4643
4644 static int light_write(char *buf)
4645 {
4646 char *cmd;
4647 int newstatus = 0;
4648
4649 if (!tp_features.light)
4650 return -ENODEV;
4651
4652 while ((cmd = next_cmd(&buf))) {
4653 if (strlencmp(cmd, "on") == 0) {
4654 newstatus = 1;
4655 } else if (strlencmp(cmd, "off") == 0) {
4656 newstatus = 0;
4657 } else
4658 return -EINVAL;
4659 }
4660
4661 return light_set_status(newstatus);
4662 }
4663
4664 static struct ibm_struct light_driver_data = {
4665 .name = "light",
4666 .read = light_read,
4667 .write = light_write,
4668 .exit = light_exit,
4669 };
4670
4671 /*************************************************************************
4672 * CMOS subdriver
4673 */
4674
4675 /* sysfs cmos_command -------------------------------------------------- */
4676 static ssize_t cmos_command_store(struct device *dev,
4677 struct device_attribute *attr,
4678 const char *buf, size_t count)
4679 {
4680 unsigned long cmos_cmd;
4681 int res;
4682
4683 if (parse_strtoul(buf, 21, &cmos_cmd))
4684 return -EINVAL;
4685
4686 res = issue_thinkpad_cmos_command(cmos_cmd);
4687 return (res)? res : count;
4688 }
4689
4690 static struct device_attribute dev_attr_cmos_command =
4691 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4692
4693 /* --------------------------------------------------------------------- */
4694
4695 static int __init cmos_init(struct ibm_init_struct *iibm)
4696 {
4697 int res;
4698
4699 vdbg_printk(TPACPI_DBG_INIT,
4700 "initializing cmos commands subdriver\n");
4701
4702 TPACPI_ACPIHANDLE_INIT(cmos);
4703
4704 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4705 str_supported(cmos_handle != NULL));
4706
4707 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4708 if (res)
4709 return res;
4710
4711 return (cmos_handle)? 0 : 1;
4712 }
4713
4714 static void cmos_exit(void)
4715 {
4716 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4717 }
4718
4719 static int cmos_read(char *p)
4720 {
4721 int len = 0;
4722
4723 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4724 R30, R31, T20-22, X20-21 */
4725 if (!cmos_handle)
4726 len += sprintf(p + len, "status:\t\tnot supported\n");
4727 else {
4728 len += sprintf(p + len, "status:\t\tsupported\n");
4729 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4730 }
4731
4732 return len;
4733 }
4734
4735 static int cmos_write(char *buf)
4736 {
4737 char *cmd;
4738 int cmos_cmd, res;
4739
4740 while ((cmd = next_cmd(&buf))) {
4741 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4742 cmos_cmd >= 0 && cmos_cmd <= 21) {
4743 /* cmos_cmd set */
4744 } else
4745 return -EINVAL;
4746
4747 res = issue_thinkpad_cmos_command(cmos_cmd);
4748 if (res)
4749 return res;
4750 }
4751
4752 return 0;
4753 }
4754
4755 static struct ibm_struct cmos_driver_data = {
4756 .name = "cmos",
4757 .read = cmos_read,
4758 .write = cmos_write,
4759 .exit = cmos_exit,
4760 };
4761
4762 /*************************************************************************
4763 * LED subdriver
4764 */
4765
4766 enum led_access_mode {
4767 TPACPI_LED_NONE = 0,
4768 TPACPI_LED_570, /* 570 */
4769 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4770 TPACPI_LED_NEW, /* all others */
4771 };
4772
4773 enum { /* For TPACPI_LED_OLD */
4774 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4775 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4776 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4777 };
4778
4779 static enum led_access_mode led_supported;
4780
4781 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4782 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4783 /* T20-22, X20-21 */
4784 "LED", /* all others */
4785 ); /* R30, R31 */
4786
4787 #define TPACPI_LED_NUMLEDS 16
4788 static struct tpacpi_led_classdev *tpacpi_leds;
4789 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4790 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4791 /* there's a limit of 19 chars + NULL before 2.6.26 */
4792 "tpacpi::power",
4793 "tpacpi:orange:batt",
4794 "tpacpi:green:batt",
4795 "tpacpi::dock_active",
4796 "tpacpi::bay_active",
4797 "tpacpi::dock_batt",
4798 "tpacpi::unknown_led",
4799 "tpacpi::standby",
4800 "tpacpi::dock_status1",
4801 "tpacpi::dock_status2",
4802 "tpacpi::unknown_led2",
4803 "tpacpi::unknown_led3",
4804 "tpacpi::thinkvantage",
4805 };
4806 #define TPACPI_SAFE_LEDS 0x1081U
4807
4808 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4809 {
4810 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4811 return false;
4812 #else
4813 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4814 #endif
4815 }
4816
4817 static int led_get_status(const unsigned int led)
4818 {
4819 int status;
4820 enum led_status_t led_s;
4821
4822 switch (led_supported) {
4823 case TPACPI_LED_570:
4824 if (!acpi_evalf(ec_handle,
4825 &status, "GLED", "dd", 1 << led))
4826 return -EIO;
4827 led_s = (status == 0)?
4828 TPACPI_LED_OFF :
4829 ((status == 1)?
4830 TPACPI_LED_ON :
4831 TPACPI_LED_BLINK);
4832 tpacpi_led_state_cache[led] = led_s;
4833 return led_s;
4834 default:
4835 return -ENXIO;
4836 }
4837
4838 /* not reached */
4839 }
4840
4841 static int led_set_status(const unsigned int led,
4842 const enum led_status_t ledstatus)
4843 {
4844 /* off, on, blink. Index is led_status_t */
4845 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4846 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4847
4848 int rc = 0;
4849
4850 switch (led_supported) {
4851 case TPACPI_LED_570:
4852 /* 570 */
4853 if (unlikely(led > 7))
4854 return -EINVAL;
4855 if (unlikely(tpacpi_is_led_restricted(led)))
4856 return -EPERM;
4857 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4858 (1 << led), led_sled_arg1[ledstatus]))
4859 rc = -EIO;
4860 break;
4861 case TPACPI_LED_OLD:
4862 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4863 if (unlikely(led > 7))
4864 return -EINVAL;
4865 if (unlikely(tpacpi_is_led_restricted(led)))
4866 return -EPERM;
4867 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4868 if (rc >= 0)
4869 rc = ec_write(TPACPI_LED_EC_HLBL,
4870 (ledstatus == TPACPI_LED_BLINK) << led);
4871 if (rc >= 0)
4872 rc = ec_write(TPACPI_LED_EC_HLCL,
4873 (ledstatus != TPACPI_LED_OFF) << led);
4874 break;
4875 case TPACPI_LED_NEW:
4876 /* all others */
4877 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4878 return -EINVAL;
4879 if (unlikely(tpacpi_is_led_restricted(led)))
4880 return -EPERM;
4881 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4882 led, led_led_arg1[ledstatus]))
4883 rc = -EIO;
4884 break;
4885 default:
4886 rc = -ENXIO;
4887 }
4888
4889 if (!rc)
4890 tpacpi_led_state_cache[led] = ledstatus;
4891
4892 return rc;
4893 }
4894
4895 static void led_set_status_worker(struct work_struct *work)
4896 {
4897 struct tpacpi_led_classdev *data =
4898 container_of(work, struct tpacpi_led_classdev, work);
4899
4900 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4901 led_set_status(data->led, data->new_state);
4902 }
4903
4904 static void led_sysfs_set(struct led_classdev *led_cdev,
4905 enum led_brightness brightness)
4906 {
4907 struct tpacpi_led_classdev *data = container_of(led_cdev,
4908 struct tpacpi_led_classdev, led_classdev);
4909
4910 if (brightness == LED_OFF)
4911 data->new_state = TPACPI_LED_OFF;
4912 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4913 data->new_state = TPACPI_LED_ON;
4914 else
4915 data->new_state = TPACPI_LED_BLINK;
4916
4917 queue_work(tpacpi_wq, &data->work);
4918 }
4919
4920 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4921 unsigned long *delay_on, unsigned long *delay_off)
4922 {
4923 struct tpacpi_led_classdev *data = container_of(led_cdev,
4924 struct tpacpi_led_classdev, led_classdev);
4925
4926 /* Can we choose the flash rate? */
4927 if (*delay_on == 0 && *delay_off == 0) {
4928 /* yes. set them to the hardware blink rate (1 Hz) */
4929 *delay_on = 500; /* ms */
4930 *delay_off = 500; /* ms */
4931 } else if ((*delay_on != 500) || (*delay_off != 500))
4932 return -EINVAL;
4933
4934 data->new_state = TPACPI_LED_BLINK;
4935 queue_work(tpacpi_wq, &data->work);
4936
4937 return 0;
4938 }
4939
4940 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4941 {
4942 int rc;
4943
4944 struct tpacpi_led_classdev *data = container_of(led_cdev,
4945 struct tpacpi_led_classdev, led_classdev);
4946
4947 rc = led_get_status(data->led);
4948
4949 if (rc == TPACPI_LED_OFF || rc < 0)
4950 rc = LED_OFF; /* no error handling in led class :( */
4951 else
4952 rc = LED_FULL;
4953
4954 return rc;
4955 }
4956
4957 static void led_exit(void)
4958 {
4959 unsigned int i;
4960
4961 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4962 if (tpacpi_leds[i].led_classdev.name)
4963 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4964 }
4965
4966 kfree(tpacpi_leds);
4967 }
4968
4969 static int __init tpacpi_init_led(unsigned int led)
4970 {
4971 int rc;
4972
4973 tpacpi_leds[led].led = led;
4974
4975 /* LEDs with no name don't get registered */
4976 if (!tpacpi_led_names[led])
4977 return 0;
4978
4979 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4980 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4981 if (led_supported == TPACPI_LED_570)
4982 tpacpi_leds[led].led_classdev.brightness_get =
4983 &led_sysfs_get;
4984
4985 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4986
4987 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4988
4989 rc = led_classdev_register(&tpacpi_pdev->dev,
4990 &tpacpi_leds[led].led_classdev);
4991 if (rc < 0)
4992 tpacpi_leds[led].led_classdev.name = NULL;
4993
4994 return rc;
4995 }
4996
4997 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
4998 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
4999 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5000 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5001
5002 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5003 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5004 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5005 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5006 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5007 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5008 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5009 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5010
5011 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5012 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5013 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5014 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5015 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5016
5017 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5018 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5019 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5020 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5021
5022 /* (1) - may have excess leds enabled on MSB */
5023
5024 /* Defaults (order matters, keep last, don't reorder!) */
5025 { /* Lenovo */
5026 .vendor = PCI_VENDOR_ID_LENOVO,
5027 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5028 .quirks = 0x1fffU,
5029 },
5030 { /* IBM ThinkPads with no EC version string */
5031 .vendor = PCI_VENDOR_ID_IBM,
5032 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5033 .quirks = 0x00ffU,
5034 },
5035 { /* IBM ThinkPads with EC version string */
5036 .vendor = PCI_VENDOR_ID_IBM,
5037 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5038 .quirks = 0x00bfU,
5039 },
5040 };
5041
5042 #undef TPACPI_LEDQ_IBM
5043 #undef TPACPI_LEDQ_LNV
5044
5045 static int __init led_init(struct ibm_init_struct *iibm)
5046 {
5047 unsigned int i;
5048 int rc;
5049 unsigned long useful_leds;
5050
5051 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5052
5053 TPACPI_ACPIHANDLE_INIT(led);
5054
5055 if (!led_handle)
5056 /* led not supported on R30, R31 */
5057 led_supported = TPACPI_LED_NONE;
5058 else if (strlencmp(led_path, "SLED") == 0)
5059 /* 570 */
5060 led_supported = TPACPI_LED_570;
5061 else if (strlencmp(led_path, "SYSL") == 0)
5062 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5063 led_supported = TPACPI_LED_OLD;
5064 else
5065 /* all others */
5066 led_supported = TPACPI_LED_NEW;
5067
5068 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5069 str_supported(led_supported), led_supported);
5070
5071 if (led_supported == TPACPI_LED_NONE)
5072 return 1;
5073
5074 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5075 GFP_KERNEL);
5076 if (!tpacpi_leds) {
5077 printk(TPACPI_ERR "Out of memory for LED data\n");
5078 return -ENOMEM;
5079 }
5080
5081 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5082 ARRAY_SIZE(led_useful_qtable));
5083
5084 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5085 if (!tpacpi_is_led_restricted(i) &&
5086 test_bit(i, &useful_leds)) {
5087 rc = tpacpi_init_led(i);
5088 if (rc < 0) {
5089 led_exit();
5090 return rc;
5091 }
5092 }
5093 }
5094
5095 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5096 printk(TPACPI_NOTICE
5097 "warning: userspace override of important "
5098 "firmware LEDs is enabled\n");
5099 #endif
5100 return 0;
5101 }
5102
5103 #define str_led_status(s) \
5104 ((s) == TPACPI_LED_OFF ? "off" : \
5105 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5106
5107 static int led_read(char *p)
5108 {
5109 int len = 0;
5110
5111 if (!led_supported) {
5112 len += sprintf(p + len, "status:\t\tnot supported\n");
5113 return len;
5114 }
5115 len += sprintf(p + len, "status:\t\tsupported\n");
5116
5117 if (led_supported == TPACPI_LED_570) {
5118 /* 570 */
5119 int i, status;
5120 for (i = 0; i < 8; i++) {
5121 status = led_get_status(i);
5122 if (status < 0)
5123 return -EIO;
5124 len += sprintf(p + len, "%d:\t\t%s\n",
5125 i, str_led_status(status));
5126 }
5127 }
5128
5129 len += sprintf(p + len, "commands:\t"
5130 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5131
5132 return len;
5133 }
5134
5135 static int led_write(char *buf)
5136 {
5137 char *cmd;
5138 int led, rc;
5139 enum led_status_t s;
5140
5141 if (!led_supported)
5142 return -ENODEV;
5143
5144 while ((cmd = next_cmd(&buf))) {
5145 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5146 return -EINVAL;
5147
5148 if (strstr(cmd, "off")) {
5149 s = TPACPI_LED_OFF;
5150 } else if (strstr(cmd, "on")) {
5151 s = TPACPI_LED_ON;
5152 } else if (strstr(cmd, "blink")) {
5153 s = TPACPI_LED_BLINK;
5154 } else {
5155 return -EINVAL;
5156 }
5157
5158 rc = led_set_status(led, s);
5159 if (rc < 0)
5160 return rc;
5161 }
5162
5163 return 0;
5164 }
5165
5166 static struct ibm_struct led_driver_data = {
5167 .name = "led",
5168 .read = led_read,
5169 .write = led_write,
5170 .exit = led_exit,
5171 };
5172
5173 /*************************************************************************
5174 * Beep subdriver
5175 */
5176
5177 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5178
5179 #define TPACPI_BEEP_Q1 0x0001
5180
5181 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5182 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5183 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5184 };
5185
5186 static int __init beep_init(struct ibm_init_struct *iibm)
5187 {
5188 unsigned long quirks;
5189
5190 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5191
5192 TPACPI_ACPIHANDLE_INIT(beep);
5193
5194 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5195 str_supported(beep_handle != NULL));
5196
5197 quirks = tpacpi_check_quirks(beep_quirk_table,
5198 ARRAY_SIZE(beep_quirk_table));
5199
5200 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5201
5202 return (beep_handle)? 0 : 1;
5203 }
5204
5205 static int beep_read(char *p)
5206 {
5207 int len = 0;
5208
5209 if (!beep_handle)
5210 len += sprintf(p + len, "status:\t\tnot supported\n");
5211 else {
5212 len += sprintf(p + len, "status:\t\tsupported\n");
5213 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5214 }
5215
5216 return len;
5217 }
5218
5219 static int beep_write(char *buf)
5220 {
5221 char *cmd;
5222 int beep_cmd;
5223
5224 if (!beep_handle)
5225 return -ENODEV;
5226
5227 while ((cmd = next_cmd(&buf))) {
5228 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5229 beep_cmd >= 0 && beep_cmd <= 17) {
5230 /* beep_cmd set */
5231 } else
5232 return -EINVAL;
5233 if (tp_features.beep_needs_two_args) {
5234 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5235 beep_cmd, 0))
5236 return -EIO;
5237 } else {
5238 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5239 beep_cmd))
5240 return -EIO;
5241 }
5242 }
5243
5244 return 0;
5245 }
5246
5247 static struct ibm_struct beep_driver_data = {
5248 .name = "beep",
5249 .read = beep_read,
5250 .write = beep_write,
5251 };
5252
5253 /*************************************************************************
5254 * Thermal subdriver
5255 */
5256
5257 enum thermal_access_mode {
5258 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5259 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5260 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5261 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5262 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5263 };
5264
5265 enum { /* TPACPI_THERMAL_TPEC_* */
5266 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5267 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5268 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5269 };
5270
5271 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5272 struct ibm_thermal_sensors_struct {
5273 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5274 };
5275
5276 static enum thermal_access_mode thermal_read_mode;
5277
5278 /* idx is zero-based */
5279 static int thermal_get_sensor(int idx, s32 *value)
5280 {
5281 int t;
5282 s8 tmp;
5283 char tmpi[5];
5284
5285 t = TP_EC_THERMAL_TMP0;
5286
5287 switch (thermal_read_mode) {
5288 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5289 case TPACPI_THERMAL_TPEC_16:
5290 if (idx >= 8 && idx <= 15) {
5291 t = TP_EC_THERMAL_TMP8;
5292 idx -= 8;
5293 }
5294 /* fallthrough */
5295 #endif
5296 case TPACPI_THERMAL_TPEC_8:
5297 if (idx <= 7) {
5298 if (!acpi_ec_read(t + idx, &tmp))
5299 return -EIO;
5300 *value = tmp * 1000;
5301 return 0;
5302 }
5303 break;
5304
5305 case TPACPI_THERMAL_ACPI_UPDT:
5306 if (idx <= 7) {
5307 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5308 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5309 return -EIO;
5310 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5311 return -EIO;
5312 *value = (t - 2732) * 100;
5313 return 0;
5314 }
5315 break;
5316
5317 case TPACPI_THERMAL_ACPI_TMP07:
5318 if (idx <= 7) {
5319 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5320 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5321 return -EIO;
5322 if (t > 127 || t < -127)
5323 t = TP_EC_THERMAL_TMP_NA;
5324 *value = t * 1000;
5325 return 0;
5326 }
5327 break;
5328
5329 case TPACPI_THERMAL_NONE:
5330 default:
5331 return -ENOSYS;
5332 }
5333
5334 return -EINVAL;
5335 }
5336
5337 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5338 {
5339 int res, i;
5340 int n;
5341
5342 n = 8;
5343 i = 0;
5344
5345 if (!s)
5346 return -EINVAL;
5347
5348 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5349 n = 16;
5350
5351 for (i = 0 ; i < n; i++) {
5352 res = thermal_get_sensor(i, &s->temp[i]);
5353 if (res)
5354 return res;
5355 }
5356
5357 return n;
5358 }
5359
5360 /* sysfs temp##_input -------------------------------------------------- */
5361
5362 static ssize_t thermal_temp_input_show(struct device *dev,
5363 struct device_attribute *attr,
5364 char *buf)
5365 {
5366 struct sensor_device_attribute *sensor_attr =
5367 to_sensor_dev_attr(attr);
5368 int idx = sensor_attr->index;
5369 s32 value;
5370 int res;
5371
5372 res = thermal_get_sensor(idx, &value);
5373 if (res)
5374 return res;
5375 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5376 return -ENXIO;
5377
5378 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5379 }
5380
5381 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5382 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5383 thermal_temp_input_show, NULL, _idxB)
5384
5385 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5386 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5387 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5388 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5389 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5390 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5391 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5392 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5393 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5394 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5395 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5396 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5397 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5398 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5399 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5400 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5401 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5402 };
5403
5404 #define THERMAL_ATTRS(X) \
5405 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5406
5407 static struct attribute *thermal_temp_input_attr[] = {
5408 THERMAL_ATTRS(8),
5409 THERMAL_ATTRS(9),
5410 THERMAL_ATTRS(10),
5411 THERMAL_ATTRS(11),
5412 THERMAL_ATTRS(12),
5413 THERMAL_ATTRS(13),
5414 THERMAL_ATTRS(14),
5415 THERMAL_ATTRS(15),
5416 THERMAL_ATTRS(0),
5417 THERMAL_ATTRS(1),
5418 THERMAL_ATTRS(2),
5419 THERMAL_ATTRS(3),
5420 THERMAL_ATTRS(4),
5421 THERMAL_ATTRS(5),
5422 THERMAL_ATTRS(6),
5423 THERMAL_ATTRS(7),
5424 NULL
5425 };
5426
5427 static const struct attribute_group thermal_temp_input16_group = {
5428 .attrs = thermal_temp_input_attr
5429 };
5430
5431 static const struct attribute_group thermal_temp_input8_group = {
5432 .attrs = &thermal_temp_input_attr[8]
5433 };
5434
5435 #undef THERMAL_SENSOR_ATTR_TEMP
5436 #undef THERMAL_ATTRS
5437
5438 /* --------------------------------------------------------------------- */
5439
5440 static int __init thermal_init(struct ibm_init_struct *iibm)
5441 {
5442 u8 t, ta1, ta2;
5443 int i;
5444 int acpi_tmp7;
5445 int res;
5446
5447 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5448
5449 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5450
5451 if (thinkpad_id.ec_model) {
5452 /*
5453 * Direct EC access mode: sensors at registers
5454 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5455 * non-implemented, thermal sensors return 0x80 when
5456 * not available
5457 */
5458
5459 ta1 = ta2 = 0;
5460 for (i = 0; i < 8; i++) {
5461 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5462 ta1 |= t;
5463 } else {
5464 ta1 = 0;
5465 break;
5466 }
5467 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5468 ta2 |= t;
5469 } else {
5470 ta1 = 0;
5471 break;
5472 }
5473 }
5474 if (ta1 == 0) {
5475 /* This is sheer paranoia, but we handle it anyway */
5476 if (acpi_tmp7) {
5477 printk(TPACPI_ERR
5478 "ThinkPad ACPI EC access misbehaving, "
5479 "falling back to ACPI TMPx access "
5480 "mode\n");
5481 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5482 } else {
5483 printk(TPACPI_ERR
5484 "ThinkPad ACPI EC access misbehaving, "
5485 "disabling thermal sensors access\n");
5486 thermal_read_mode = TPACPI_THERMAL_NONE;
5487 }
5488 } else {
5489 thermal_read_mode =
5490 (ta2 != 0) ?
5491 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5492 }
5493 } else if (acpi_tmp7) {
5494 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5495 /* 600e/x, 770e, 770x */
5496 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5497 } else {
5498 /* Standard ACPI TMPx access, max 8 sensors */
5499 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5500 }
5501 } else {
5502 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5503 thermal_read_mode = TPACPI_THERMAL_NONE;
5504 }
5505
5506 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5507 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5508 thermal_read_mode);
5509
5510 switch (thermal_read_mode) {
5511 case TPACPI_THERMAL_TPEC_16:
5512 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5513 &thermal_temp_input16_group);
5514 if (res)
5515 return res;
5516 break;
5517 case TPACPI_THERMAL_TPEC_8:
5518 case TPACPI_THERMAL_ACPI_TMP07:
5519 case TPACPI_THERMAL_ACPI_UPDT:
5520 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5521 &thermal_temp_input8_group);
5522 if (res)
5523 return res;
5524 break;
5525 case TPACPI_THERMAL_NONE:
5526 default:
5527 return 1;
5528 }
5529
5530 return 0;
5531 }
5532
5533 static void thermal_exit(void)
5534 {
5535 switch (thermal_read_mode) {
5536 case TPACPI_THERMAL_TPEC_16:
5537 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5538 &thermal_temp_input16_group);
5539 break;
5540 case TPACPI_THERMAL_TPEC_8:
5541 case TPACPI_THERMAL_ACPI_TMP07:
5542 case TPACPI_THERMAL_ACPI_UPDT:
5543 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5544 &thermal_temp_input16_group);
5545 break;
5546 case TPACPI_THERMAL_NONE:
5547 default:
5548 break;
5549 }
5550 }
5551
5552 static int thermal_read(char *p)
5553 {
5554 int len = 0;
5555 int n, i;
5556 struct ibm_thermal_sensors_struct t;
5557
5558 n = thermal_get_sensors(&t);
5559 if (unlikely(n < 0))
5560 return n;
5561
5562 len += sprintf(p + len, "temperatures:\t");
5563
5564 if (n > 0) {
5565 for (i = 0; i < (n - 1); i++)
5566 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5567 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5568 } else
5569 len += sprintf(p + len, "not supported\n");
5570
5571 return len;
5572 }
5573
5574 static struct ibm_struct thermal_driver_data = {
5575 .name = "thermal",
5576 .read = thermal_read,
5577 .exit = thermal_exit,
5578 };
5579
5580 /*************************************************************************
5581 * EC Dump subdriver
5582 */
5583
5584 static u8 ecdump_regs[256];
5585
5586 static int ecdump_read(char *p)
5587 {
5588 int len = 0;
5589 int i, j;
5590 u8 v;
5591
5592 len += sprintf(p + len, "EC "
5593 " +00 +01 +02 +03 +04 +05 +06 +07"
5594 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5595 for (i = 0; i < 256; i += 16) {
5596 len += sprintf(p + len, "EC 0x%02x:", i);
5597 for (j = 0; j < 16; j++) {
5598 if (!acpi_ec_read(i + j, &v))
5599 break;
5600 if (v != ecdump_regs[i + j])
5601 len += sprintf(p + len, " *%02x", v);
5602 else
5603 len += sprintf(p + len, " %02x", v);
5604 ecdump_regs[i + j] = v;
5605 }
5606 len += sprintf(p + len, "\n");
5607 if (j != 16)
5608 break;
5609 }
5610
5611 /* These are way too dangerous to advertise openly... */
5612 #if 0
5613 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5614 " (<offset> is 00-ff, <value> is 00-ff)\n");
5615 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5616 " (<offset> is 00-ff, <value> is 0-255)\n");
5617 #endif
5618 return len;
5619 }
5620
5621 static int ecdump_write(char *buf)
5622 {
5623 char *cmd;
5624 int i, v;
5625
5626 while ((cmd = next_cmd(&buf))) {
5627 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5628 /* i and v set */
5629 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5630 /* i and v set */
5631 } else
5632 return -EINVAL;
5633 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5634 if (!acpi_ec_write(i, v))
5635 return -EIO;
5636 } else
5637 return -EINVAL;
5638 }
5639
5640 return 0;
5641 }
5642
5643 static struct ibm_struct ecdump_driver_data = {
5644 .name = "ecdump",
5645 .read = ecdump_read,
5646 .write = ecdump_write,
5647 .flags.experimental = 1,
5648 };
5649
5650 /*************************************************************************
5651 * Backlight/brightness subdriver
5652 */
5653
5654 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5655
5656 /*
5657 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5658 * CMOS NVRAM byte 0x5E, bits 0-3.
5659 *
5660 * EC HBRV (0x31) has the following layout
5661 * Bit 7: unknown function
5662 * Bit 6: unknown function
5663 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5664 * Bit 4: must be set to zero to avoid problems
5665 * Bit 3-0: backlight brightness level
5666 *
5667 * brightness_get_raw returns status data in the HBRV layout
5668 *
5669 * WARNING: The X61 has been verified to use HBRV for something else, so
5670 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5671 * testing on the very early *60 Lenovo models...
5672 */
5673
5674 enum {
5675 TP_EC_BACKLIGHT = 0x31,
5676
5677 /* TP_EC_BACKLIGHT bitmasks */
5678 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5679 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5680 TP_EC_BACKLIGHT_MAPSW = 0x20,
5681 };
5682
5683 enum tpacpi_brightness_access_mode {
5684 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5685 TPACPI_BRGHT_MODE_EC, /* EC control */
5686 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5687 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5688 TPACPI_BRGHT_MODE_MAX
5689 };
5690
5691 static struct backlight_device *ibm_backlight_device;
5692
5693 static enum tpacpi_brightness_access_mode brightness_mode =
5694 TPACPI_BRGHT_MODE_MAX;
5695
5696 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5697
5698 static struct mutex brightness_mutex;
5699
5700 /* NVRAM brightness access,
5701 * call with brightness_mutex held! */
5702 static unsigned int tpacpi_brightness_nvram_get(void)
5703 {
5704 u8 lnvram;
5705
5706 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5707 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5708 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5709 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5710
5711 return lnvram;
5712 }
5713
5714 static void tpacpi_brightness_checkpoint_nvram(void)
5715 {
5716 u8 lec = 0;
5717 u8 b_nvram;
5718
5719 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5720 return;
5721
5722 vdbg_printk(TPACPI_DBG_BRGHT,
5723 "trying to checkpoint backlight level to NVRAM...\n");
5724
5725 if (mutex_lock_killable(&brightness_mutex) < 0)
5726 return;
5727
5728 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5729 goto unlock;
5730 lec &= TP_EC_BACKLIGHT_LVLMSK;
5731 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5732
5733 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5734 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5735 /* NVRAM needs update */
5736 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5737 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5738 b_nvram |= lec;
5739 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5740 dbg_printk(TPACPI_DBG_BRGHT,
5741 "updated NVRAM backlight level to %u (0x%02x)\n",
5742 (unsigned int) lec, (unsigned int) b_nvram);
5743 } else
5744 vdbg_printk(TPACPI_DBG_BRGHT,
5745 "NVRAM backlight level already is %u (0x%02x)\n",
5746 (unsigned int) lec, (unsigned int) b_nvram);
5747
5748 unlock:
5749 mutex_unlock(&brightness_mutex);
5750 }
5751
5752
5753 /* call with brightness_mutex held! */
5754 static int tpacpi_brightness_get_raw(int *status)
5755 {
5756 u8 lec = 0;
5757
5758 switch (brightness_mode) {
5759 case TPACPI_BRGHT_MODE_UCMS_STEP:
5760 *status = tpacpi_brightness_nvram_get();
5761 return 0;
5762 case TPACPI_BRGHT_MODE_EC:
5763 case TPACPI_BRGHT_MODE_ECNVRAM:
5764 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5765 return -EIO;
5766 *status = lec;
5767 return 0;
5768 default:
5769 return -ENXIO;
5770 }
5771 }
5772
5773 /* call with brightness_mutex held! */
5774 /* do NOT call with illegal backlight level value */
5775 static int tpacpi_brightness_set_ec(unsigned int value)
5776 {
5777 u8 lec = 0;
5778
5779 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5780 return -EIO;
5781
5782 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5783 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5784 (value & TP_EC_BACKLIGHT_LVLMSK))))
5785 return -EIO;
5786
5787 return 0;
5788 }
5789
5790 /* call with brightness_mutex held! */
5791 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5792 {
5793 int cmos_cmd, inc;
5794 unsigned int current_value, i;
5795
5796 current_value = tpacpi_brightness_nvram_get();
5797
5798 if (value == current_value)
5799 return 0;
5800
5801 cmos_cmd = (value > current_value) ?
5802 TP_CMOS_BRIGHTNESS_UP :
5803 TP_CMOS_BRIGHTNESS_DOWN;
5804 inc = (value > current_value) ? 1 : -1;
5805
5806 for (i = current_value; i != value; i += inc)
5807 if (issue_thinkpad_cmos_command(cmos_cmd))
5808 return -EIO;
5809
5810 return 0;
5811 }
5812
5813 /* May return EINTR which can always be mapped to ERESTARTSYS */
5814 static int brightness_set(unsigned int value)
5815 {
5816 int res;
5817
5818 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5819 value < 0)
5820 return -EINVAL;
5821
5822 vdbg_printk(TPACPI_DBG_BRGHT,
5823 "set backlight level to %d\n", value);
5824
5825 res = mutex_lock_killable(&brightness_mutex);
5826 if (res < 0)
5827 return res;
5828
5829 switch (brightness_mode) {
5830 case TPACPI_BRGHT_MODE_EC:
5831 case TPACPI_BRGHT_MODE_ECNVRAM:
5832 res = tpacpi_brightness_set_ec(value);
5833 break;
5834 case TPACPI_BRGHT_MODE_UCMS_STEP:
5835 res = tpacpi_brightness_set_ucmsstep(value);
5836 break;
5837 default:
5838 res = -ENXIO;
5839 }
5840
5841 mutex_unlock(&brightness_mutex);
5842 return res;
5843 }
5844
5845 /* sysfs backlight class ----------------------------------------------- */
5846
5847 static int brightness_update_status(struct backlight_device *bd)
5848 {
5849 unsigned int level =
5850 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5851 bd->props.power == FB_BLANK_UNBLANK) ?
5852 bd->props.brightness : 0;
5853
5854 dbg_printk(TPACPI_DBG_BRGHT,
5855 "backlight: attempt to set level to %d\n",
5856 level);
5857
5858 /* it is the backlight class's job (caller) to handle
5859 * EINTR and other errors properly */
5860 return brightness_set(level);
5861 }
5862
5863 static int brightness_get(struct backlight_device *bd)
5864 {
5865 int status, res;
5866
5867 res = mutex_lock_killable(&brightness_mutex);
5868 if (res < 0)
5869 return 0;
5870
5871 res = tpacpi_brightness_get_raw(&status);
5872
5873 mutex_unlock(&brightness_mutex);
5874
5875 if (res < 0)
5876 return 0;
5877
5878 return status & TP_EC_BACKLIGHT_LVLMSK;
5879 }
5880
5881 static struct backlight_ops ibm_backlight_data = {
5882 .get_brightness = brightness_get,
5883 .update_status = brightness_update_status,
5884 };
5885
5886 /* --------------------------------------------------------------------- */
5887
5888 /*
5889 * These are only useful for models that have only one possibility
5890 * of GPU. If the BIOS model handles both ATI and Intel, don't use
5891 * these quirks.
5892 */
5893 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
5894 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
5895 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
5896
5897 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
5898 /* Models with ATI GPUs known to require ECNVRAM mode */
5899 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
5900
5901 /* Models with ATI GPUs that can use ECNVRAM */
5902 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
5903 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5904 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5905 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5906
5907 /* Models with Intel Extreme Graphics 2 */
5908 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
5909 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5910 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5911
5912 /* Models with Intel GMA900 */
5913 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
5914 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
5915 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
5916 };
5917
5918 static int __init brightness_init(struct ibm_init_struct *iibm)
5919 {
5920 int b;
5921 unsigned long quirks;
5922
5923 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5924
5925 mutex_init(&brightness_mutex);
5926
5927 quirks = tpacpi_check_quirks(brightness_quirk_table,
5928 ARRAY_SIZE(brightness_quirk_table));
5929
5930 /*
5931 * We always attempt to detect acpi support, so as to switch
5932 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5933 * going to publish a backlight interface
5934 */
5935 b = tpacpi_check_std_acpi_brightness_support();
5936 if (b > 0) {
5937
5938 if (acpi_video_backlight_support()) {
5939 if (brightness_enable > 1) {
5940 printk(TPACPI_NOTICE
5941 "Standard ACPI backlight interface "
5942 "available, not loading native one.\n");
5943 return 1;
5944 } else if (brightness_enable == 1) {
5945 printk(TPACPI_NOTICE
5946 "Backlight control force enabled, even if standard "
5947 "ACPI backlight interface is available\n");
5948 }
5949 } else {
5950 if (brightness_enable > 1) {
5951 printk(TPACPI_NOTICE
5952 "Standard ACPI backlight interface not "
5953 "available, thinkpad_acpi native "
5954 "brightness control enabled\n");
5955 }
5956 }
5957 }
5958
5959 if (!brightness_enable) {
5960 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5961 "brightness support disabled by "
5962 "module parameter\n");
5963 return 1;
5964 }
5965
5966 if (b > 16) {
5967 printk(TPACPI_ERR
5968 "Unsupported brightness interface, "
5969 "please contact %s\n", TPACPI_MAIL);
5970 return 1;
5971 }
5972 if (b == 16)
5973 tp_features.bright_16levels = 1;
5974
5975 /*
5976 * Check for module parameter bogosity, note that we
5977 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5978 * able to detect "unspecified"
5979 */
5980 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5981 return -EINVAL;
5982
5983 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5984 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5985 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5986 if (quirks & TPACPI_BRGHT_Q_EC)
5987 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5988 else
5989 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5990
5991 dbg_printk(TPACPI_DBG_BRGHT,
5992 "driver auto-selected brightness_mode=%d\n",
5993 brightness_mode);
5994 }
5995
5996 /* Safety */
5997 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
5998 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
5999 brightness_mode == TPACPI_BRGHT_MODE_EC))
6000 return -EINVAL;
6001
6002 if (tpacpi_brightness_get_raw(&b) < 0)
6003 return 1;
6004
6005 if (tp_features.bright_16levels)
6006 printk(TPACPI_INFO
6007 "detected a 16-level brightness capable ThinkPad\n");
6008
6009 ibm_backlight_device = backlight_device_register(
6010 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6011 &ibm_backlight_data);
6012 if (IS_ERR(ibm_backlight_device)) {
6013 int rc = PTR_ERR(ibm_backlight_device);
6014 ibm_backlight_device = NULL;
6015 printk(TPACPI_ERR "Could not register backlight device\n");
6016 return rc;
6017 }
6018 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6019 "brightness is supported\n");
6020
6021 if (quirks & TPACPI_BRGHT_Q_ASK) {
6022 printk(TPACPI_NOTICE
6023 "brightness: will use unverified default: "
6024 "brightness_mode=%d\n", brightness_mode);
6025 printk(TPACPI_NOTICE
6026 "brightness: please report to %s whether it works well "
6027 "or not on your ThinkPad\n", TPACPI_MAIL);
6028 }
6029
6030 ibm_backlight_device->props.max_brightness =
6031 (tp_features.bright_16levels)? 15 : 7;
6032 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6033 backlight_update_status(ibm_backlight_device);
6034
6035 return 0;
6036 }
6037
6038 static void brightness_suspend(pm_message_t state)
6039 {
6040 tpacpi_brightness_checkpoint_nvram();
6041 }
6042
6043 static void brightness_shutdown(void)
6044 {
6045 tpacpi_brightness_checkpoint_nvram();
6046 }
6047
6048 static void brightness_exit(void)
6049 {
6050 if (ibm_backlight_device) {
6051 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6052 "calling backlight_device_unregister()\n");
6053 backlight_device_unregister(ibm_backlight_device);
6054 }
6055
6056 tpacpi_brightness_checkpoint_nvram();
6057 }
6058
6059 static int brightness_read(char *p)
6060 {
6061 int len = 0;
6062 int level;
6063
6064 level = brightness_get(NULL);
6065 if (level < 0) {
6066 len += sprintf(p + len, "level:\t\tunreadable\n");
6067 } else {
6068 len += sprintf(p + len, "level:\t\t%d\n", level);
6069 len += sprintf(p + len, "commands:\tup, down\n");
6070 len += sprintf(p + len, "commands:\tlevel <level>"
6071 " (<level> is 0-%d)\n",
6072 (tp_features.bright_16levels) ? 15 : 7);
6073 }
6074
6075 return len;
6076 }
6077
6078 static int brightness_write(char *buf)
6079 {
6080 int level;
6081 int rc;
6082 char *cmd;
6083 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6084
6085 level = brightness_get(NULL);
6086 if (level < 0)
6087 return level;
6088
6089 while ((cmd = next_cmd(&buf))) {
6090 if (strlencmp(cmd, "up") == 0) {
6091 if (level < max_level)
6092 level++;
6093 } else if (strlencmp(cmd, "down") == 0) {
6094 if (level > 0)
6095 level--;
6096 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6097 level >= 0 && level <= max_level) {
6098 /* new level set */
6099 } else
6100 return -EINVAL;
6101 }
6102
6103 tpacpi_disclose_usertask("procfs brightness",
6104 "set level to %d\n", level);
6105
6106 /*
6107 * Now we know what the final level should be, so we try to set it.
6108 * Doing it this way makes the syscall restartable in case of EINTR
6109 */
6110 rc = brightness_set(level);
6111 return (rc == -EINTR)? ERESTARTSYS : rc;
6112 }
6113
6114 static struct ibm_struct brightness_driver_data = {
6115 .name = "brightness",
6116 .read = brightness_read,
6117 .write = brightness_write,
6118 .exit = brightness_exit,
6119 .suspend = brightness_suspend,
6120 .shutdown = brightness_shutdown,
6121 };
6122
6123 /*************************************************************************
6124 * Volume subdriver
6125 */
6126
6127 static int volume_offset = 0x30;
6128
6129 static int volume_read(char *p)
6130 {
6131 int len = 0;
6132 u8 level;
6133
6134 if (!acpi_ec_read(volume_offset, &level)) {
6135 len += sprintf(p + len, "level:\t\tunreadable\n");
6136 } else {
6137 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6138 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6139 len += sprintf(p + len, "commands:\tup, down, mute\n");
6140 len += sprintf(p + len, "commands:\tlevel <level>"
6141 " (<level> is 0-15)\n");
6142 }
6143
6144 return len;
6145 }
6146
6147 static int volume_write(char *buf)
6148 {
6149 int cmos_cmd, inc, i;
6150 u8 level, mute;
6151 int new_level, new_mute;
6152 char *cmd;
6153
6154 while ((cmd = next_cmd(&buf))) {
6155 if (!acpi_ec_read(volume_offset, &level))
6156 return -EIO;
6157 new_mute = mute = level & 0x40;
6158 new_level = level = level & 0xf;
6159
6160 if (strlencmp(cmd, "up") == 0) {
6161 if (mute)
6162 new_mute = 0;
6163 else
6164 new_level = level == 15 ? 15 : level + 1;
6165 } else if (strlencmp(cmd, "down") == 0) {
6166 if (mute)
6167 new_mute = 0;
6168 else
6169 new_level = level == 0 ? 0 : level - 1;
6170 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6171 new_level >= 0 && new_level <= 15) {
6172 /* new_level set */
6173 } else if (strlencmp(cmd, "mute") == 0) {
6174 new_mute = 0x40;
6175 } else
6176 return -EINVAL;
6177
6178 if (new_level != level) {
6179 /* mute doesn't change */
6180
6181 cmos_cmd = (new_level > level) ?
6182 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6183 inc = new_level > level ? 1 : -1;
6184
6185 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6186 !acpi_ec_write(volume_offset, level)))
6187 return -EIO;
6188
6189 for (i = level; i != new_level; i += inc)
6190 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6191 !acpi_ec_write(volume_offset, i + inc))
6192 return -EIO;
6193
6194 if (mute &&
6195 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6196 !acpi_ec_write(volume_offset, new_level + mute))) {
6197 return -EIO;
6198 }
6199 }
6200
6201 if (new_mute != mute) {
6202 /* level doesn't change */
6203
6204 cmos_cmd = (new_mute) ?
6205 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6206
6207 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6208 !acpi_ec_write(volume_offset, level + new_mute))
6209 return -EIO;
6210 }
6211 }
6212
6213 return 0;
6214 }
6215
6216 static struct ibm_struct volume_driver_data = {
6217 .name = "volume",
6218 .read = volume_read,
6219 .write = volume_write,
6220 };
6221
6222 /*************************************************************************
6223 * Fan subdriver
6224 */
6225
6226 /*
6227 * FAN ACCESS MODES
6228 *
6229 * TPACPI_FAN_RD_ACPI_GFAN:
6230 * ACPI GFAN method: returns fan level
6231 *
6232 * see TPACPI_FAN_WR_ACPI_SFAN
6233 * EC 0x2f (HFSP) not available if GFAN exists
6234 *
6235 * TPACPI_FAN_WR_ACPI_SFAN:
6236 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6237 *
6238 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6239 * it for writing.
6240 *
6241 * TPACPI_FAN_WR_TPEC:
6242 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6243 * Supported on almost all ThinkPads
6244 *
6245 * Fan speed changes of any sort (including those caused by the
6246 * disengaged mode) are usually done slowly by the firmware as the
6247 * maximum ammount of fan duty cycle change per second seems to be
6248 * limited.
6249 *
6250 * Reading is not available if GFAN exists.
6251 * Writing is not available if SFAN exists.
6252 *
6253 * Bits
6254 * 7 automatic mode engaged;
6255 * (default operation mode of the ThinkPad)
6256 * fan level is ignored in this mode.
6257 * 6 full speed mode (takes precedence over bit 7);
6258 * not available on all thinkpads. May disable
6259 * the tachometer while the fan controller ramps up
6260 * the speed (which can take up to a few *minutes*).
6261 * Speeds up fan to 100% duty-cycle, which is far above
6262 * the standard RPM levels. It is not impossible that
6263 * it could cause hardware damage.
6264 * 5-3 unused in some models. Extra bits for fan level
6265 * in others, but still useless as all values above
6266 * 7 map to the same speed as level 7 in these models.
6267 * 2-0 fan level (0..7 usually)
6268 * 0x00 = stop
6269 * 0x07 = max (set when temperatures critical)
6270 * Some ThinkPads may have other levels, see
6271 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6272 *
6273 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6274 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6275 * does so, its initial value is meaningless (0x07).
6276 *
6277 * For firmware bugs, refer to:
6278 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6279 *
6280 * ----
6281 *
6282 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6283 * Main fan tachometer reading (in RPM)
6284 *
6285 * This register is present on all ThinkPads with a new-style EC, and
6286 * it is known not to be present on the A21m/e, and T22, as there is
6287 * something else in offset 0x84 according to the ACPI DSDT. Other
6288 * ThinkPads from this same time period (and earlier) probably lack the
6289 * tachometer as well.
6290 *
6291 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6292 * was never fixed by IBM to report the EC firmware version string
6293 * probably support the tachometer (like the early X models), so
6294 * detecting it is quite hard. We need more data to know for sure.
6295 *
6296 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6297 * might result.
6298 *
6299 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6300 * mode.
6301 *
6302 * For firmware bugs, refer to:
6303 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6304 *
6305 * ----
6306 *
6307 * ThinkPad EC register 0x31 bit 0 (only on select models)
6308 *
6309 * When bit 0 of EC register 0x31 is zero, the tachometer registers
6310 * show the speed of the main fan. When bit 0 of EC register 0x31
6311 * is one, the tachometer registers show the speed of the auxiliary
6312 * fan.
6313 *
6314 * Fan control seems to affect both fans, regardless of the state
6315 * of this bit.
6316 *
6317 * So far, only the firmware for the X60/X61 non-tablet versions
6318 * seem to support this (firmware TP-7M).
6319 *
6320 * TPACPI_FAN_WR_ACPI_FANS:
6321 * ThinkPad X31, X40, X41. Not available in the X60.
6322 *
6323 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6324 * high speed. ACPI DSDT seems to map these three speeds to levels
6325 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6326 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6327 *
6328 * The speeds are stored on handles
6329 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6330 *
6331 * There are three default speed sets, acessible as handles:
6332 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6333 *
6334 * ACPI DSDT switches which set is in use depending on various
6335 * factors.
6336 *
6337 * TPACPI_FAN_WR_TPEC is also available and should be used to
6338 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6339 * but the ACPI tables just mention level 7.
6340 */
6341
6342 enum { /* Fan control constants */
6343 fan_status_offset = 0x2f, /* EC register 0x2f */
6344 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6345 * 0x84 must be read before 0x85 */
6346 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
6347 bit 0 selects which fan is active */
6348
6349 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6350 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6351
6352 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6353 };
6354
6355 enum fan_status_access_mode {
6356 TPACPI_FAN_NONE = 0, /* No fan status or control */
6357 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6358 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6359 };
6360
6361 enum fan_control_access_mode {
6362 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6363 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6364 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6365 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6366 };
6367
6368 enum fan_control_commands {
6369 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6370 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6371 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6372 * and also watchdog cmd */
6373 };
6374
6375 static int fan_control_allowed;
6376
6377 static enum fan_status_access_mode fan_status_access_mode;
6378 static enum fan_control_access_mode fan_control_access_mode;
6379 static enum fan_control_commands fan_control_commands;
6380
6381 static u8 fan_control_initial_status;
6382 static u8 fan_control_desired_level;
6383 static u8 fan_control_resume_level;
6384 static int fan_watchdog_maxinterval;
6385
6386 static struct mutex fan_mutex;
6387
6388 static void fan_watchdog_fire(struct work_struct *ignored);
6389 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6390
6391 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6392 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6393 "\\FSPD", /* 600e/x, 770e, 770x */
6394 ); /* all others */
6395 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6396 "JFNS", /* 770x-JL */
6397 ); /* all others */
6398
6399 /*
6400 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6401 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6402 * be in auto mode (0x80).
6403 *
6404 * This is corrected by any write to HFSP either by the driver, or
6405 * by the firmware.
6406 *
6407 * We assume 0x07 really means auto mode while this quirk is active,
6408 * as this is far more likely than the ThinkPad being in level 7,
6409 * which is only used by the firmware during thermal emergencies.
6410 *
6411 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6412 * TP-70 (T43, R52), which are known to be buggy.
6413 */
6414
6415 static void fan_quirk1_setup(void)
6416 {
6417 if (fan_control_initial_status == 0x07) {
6418 printk(TPACPI_NOTICE
6419 "fan_init: initial fan status is unknown, "
6420 "assuming it is in auto mode\n");
6421 tp_features.fan_ctrl_status_undef = 1;
6422 }
6423 }
6424
6425 static void fan_quirk1_handle(u8 *fan_status)
6426 {
6427 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6428 if (*fan_status != fan_control_initial_status) {
6429 /* something changed the HFSP regisnter since
6430 * driver init time, so it is not undefined
6431 * anymore */
6432 tp_features.fan_ctrl_status_undef = 0;
6433 } else {
6434 /* Return most likely status. In fact, it
6435 * might be the only possible status */
6436 *fan_status = TP_EC_FAN_AUTO;
6437 }
6438 }
6439 }
6440
6441 /* Select main fan on X60/X61, NOOP on others */
6442 static bool fan_select_fan1(void)
6443 {
6444 if (tp_features.second_fan) {
6445 u8 val;
6446
6447 if (ec_read(fan_select_offset, &val) < 0)
6448 return false;
6449 val &= 0xFEU;
6450 if (ec_write(fan_select_offset, val) < 0)
6451 return false;
6452 }
6453 return true;
6454 }
6455
6456 /* Select secondary fan on X60/X61 */
6457 static bool fan_select_fan2(void)
6458 {
6459 u8 val;
6460
6461 if (!tp_features.second_fan)
6462 return false;
6463
6464 if (ec_read(fan_select_offset, &val) < 0)
6465 return false;
6466 val |= 0x01U;
6467 if (ec_write(fan_select_offset, val) < 0)
6468 return false;
6469
6470 return true;
6471 }
6472
6473 /*
6474 * Call with fan_mutex held
6475 */
6476 static void fan_update_desired_level(u8 status)
6477 {
6478 if ((status &
6479 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6480 if (status > 7)
6481 fan_control_desired_level = 7;
6482 else
6483 fan_control_desired_level = status;
6484 }
6485 }
6486
6487 static int fan_get_status(u8 *status)
6488 {
6489 u8 s;
6490
6491 /* TODO:
6492 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6493
6494 switch (fan_status_access_mode) {
6495 case TPACPI_FAN_RD_ACPI_GFAN:
6496 /* 570, 600e/x, 770e, 770x */
6497
6498 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6499 return -EIO;
6500
6501 if (likely(status))
6502 *status = s & 0x07;
6503
6504 break;
6505
6506 case TPACPI_FAN_RD_TPEC:
6507 /* all except 570, 600e/x, 770e, 770x */
6508 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6509 return -EIO;
6510
6511 if (likely(status)) {
6512 *status = s;
6513 fan_quirk1_handle(status);
6514 }
6515
6516 break;
6517
6518 default:
6519 return -ENXIO;
6520 }
6521
6522 return 0;
6523 }
6524
6525 static int fan_get_status_safe(u8 *status)
6526 {
6527 int rc;
6528 u8 s;
6529
6530 if (mutex_lock_killable(&fan_mutex))
6531 return -ERESTARTSYS;
6532 rc = fan_get_status(&s);
6533 if (!rc)
6534 fan_update_desired_level(s);
6535 mutex_unlock(&fan_mutex);
6536
6537 if (status)
6538 *status = s;
6539
6540 return rc;
6541 }
6542
6543 static int fan_get_speed(unsigned int *speed)
6544 {
6545 u8 hi, lo;
6546
6547 switch (fan_status_access_mode) {
6548 case TPACPI_FAN_RD_TPEC:
6549 /* all except 570, 600e/x, 770e, 770x */
6550 if (unlikely(!fan_select_fan1()))
6551 return -EIO;
6552 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6553 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6554 return -EIO;
6555
6556 if (likely(speed))
6557 *speed = (hi << 8) | lo;
6558
6559 break;
6560
6561 default:
6562 return -ENXIO;
6563 }
6564
6565 return 0;
6566 }
6567
6568 static int fan2_get_speed(unsigned int *speed)
6569 {
6570 u8 hi, lo;
6571 bool rc;
6572
6573 switch (fan_status_access_mode) {
6574 case TPACPI_FAN_RD_TPEC:
6575 /* all except 570, 600e/x, 770e, 770x */
6576 if (unlikely(!fan_select_fan2()))
6577 return -EIO;
6578 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6579 !acpi_ec_read(fan_rpm_offset + 1, &hi);
6580 fan_select_fan1(); /* play it safe */
6581 if (rc)
6582 return -EIO;
6583
6584 if (likely(speed))
6585 *speed = (hi << 8) | lo;
6586
6587 break;
6588
6589 default:
6590 return -ENXIO;
6591 }
6592
6593 return 0;
6594 }
6595
6596 static int fan_set_level(int level)
6597 {
6598 if (!fan_control_allowed)
6599 return -EPERM;
6600
6601 switch (fan_control_access_mode) {
6602 case TPACPI_FAN_WR_ACPI_SFAN:
6603 if (level >= 0 && level <= 7) {
6604 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6605 return -EIO;
6606 } else
6607 return -EINVAL;
6608 break;
6609
6610 case TPACPI_FAN_WR_ACPI_FANS:
6611 case TPACPI_FAN_WR_TPEC:
6612 if (!(level & TP_EC_FAN_AUTO) &&
6613 !(level & TP_EC_FAN_FULLSPEED) &&
6614 ((level < 0) || (level > 7)))
6615 return -EINVAL;
6616
6617 /* safety net should the EC not support AUTO
6618 * or FULLSPEED mode bits and just ignore them */
6619 if (level & TP_EC_FAN_FULLSPEED)
6620 level |= 7; /* safety min speed 7 */
6621 else if (level & TP_EC_FAN_AUTO)
6622 level |= 4; /* safety min speed 4 */
6623
6624 if (!acpi_ec_write(fan_status_offset, level))
6625 return -EIO;
6626 else
6627 tp_features.fan_ctrl_status_undef = 0;
6628 break;
6629
6630 default:
6631 return -ENXIO;
6632 }
6633
6634 vdbg_printk(TPACPI_DBG_FAN,
6635 "fan control: set fan control register to 0x%02x\n", level);
6636 return 0;
6637 }
6638
6639 static int fan_set_level_safe(int level)
6640 {
6641 int rc;
6642
6643 if (!fan_control_allowed)
6644 return -EPERM;
6645
6646 if (mutex_lock_killable(&fan_mutex))
6647 return -ERESTARTSYS;
6648
6649 if (level == TPACPI_FAN_LAST_LEVEL)
6650 level = fan_control_desired_level;
6651
6652 rc = fan_set_level(level);
6653 if (!rc)
6654 fan_update_desired_level(level);
6655
6656 mutex_unlock(&fan_mutex);
6657 return rc;
6658 }
6659
6660 static int fan_set_enable(void)
6661 {
6662 u8 s;
6663 int rc;
6664
6665 if (!fan_control_allowed)
6666 return -EPERM;
6667
6668 if (mutex_lock_killable(&fan_mutex))
6669 return -ERESTARTSYS;
6670
6671 switch (fan_control_access_mode) {
6672 case TPACPI_FAN_WR_ACPI_FANS:
6673 case TPACPI_FAN_WR_TPEC:
6674 rc = fan_get_status(&s);
6675 if (rc < 0)
6676 break;
6677
6678 /* Don't go out of emergency fan mode */
6679 if (s != 7) {
6680 s &= 0x07;
6681 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6682 }
6683
6684 if (!acpi_ec_write(fan_status_offset, s))
6685 rc = -EIO;
6686 else {
6687 tp_features.fan_ctrl_status_undef = 0;
6688 rc = 0;
6689 }
6690 break;
6691
6692 case TPACPI_FAN_WR_ACPI_SFAN:
6693 rc = fan_get_status(&s);
6694 if (rc < 0)
6695 break;
6696
6697 s &= 0x07;
6698
6699 /* Set fan to at least level 4 */
6700 s |= 4;
6701
6702 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6703 rc = -EIO;
6704 else
6705 rc = 0;
6706 break;
6707
6708 default:
6709 rc = -ENXIO;
6710 }
6711
6712 mutex_unlock(&fan_mutex);
6713
6714 if (!rc)
6715 vdbg_printk(TPACPI_DBG_FAN,
6716 "fan control: set fan control register to 0x%02x\n",
6717 s);
6718 return rc;
6719 }
6720
6721 static int fan_set_disable(void)
6722 {
6723 int rc;
6724
6725 if (!fan_control_allowed)
6726 return -EPERM;
6727
6728 if (mutex_lock_killable(&fan_mutex))
6729 return -ERESTARTSYS;
6730
6731 rc = 0;
6732 switch (fan_control_access_mode) {
6733 case TPACPI_FAN_WR_ACPI_FANS:
6734 case TPACPI_FAN_WR_TPEC:
6735 if (!acpi_ec_write(fan_status_offset, 0x00))
6736 rc = -EIO;
6737 else {
6738 fan_control_desired_level = 0;
6739 tp_features.fan_ctrl_status_undef = 0;
6740 }
6741 break;
6742
6743 case TPACPI_FAN_WR_ACPI_SFAN:
6744 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6745 rc = -EIO;
6746 else
6747 fan_control_desired_level = 0;
6748 break;
6749
6750 default:
6751 rc = -ENXIO;
6752 }
6753
6754 if (!rc)
6755 vdbg_printk(TPACPI_DBG_FAN,
6756 "fan control: set fan control register to 0\n");
6757
6758 mutex_unlock(&fan_mutex);
6759 return rc;
6760 }
6761
6762 static int fan_set_speed(int speed)
6763 {
6764 int rc;
6765
6766 if (!fan_control_allowed)
6767 return -EPERM;
6768
6769 if (mutex_lock_killable(&fan_mutex))
6770 return -ERESTARTSYS;
6771
6772 rc = 0;
6773 switch (fan_control_access_mode) {
6774 case TPACPI_FAN_WR_ACPI_FANS:
6775 if (speed >= 0 && speed <= 65535) {
6776 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6777 speed, speed, speed))
6778 rc = -EIO;
6779 } else
6780 rc = -EINVAL;
6781 break;
6782
6783 default:
6784 rc = -ENXIO;
6785 }
6786
6787 mutex_unlock(&fan_mutex);
6788 return rc;
6789 }
6790
6791 static void fan_watchdog_reset(void)
6792 {
6793 static int fan_watchdog_active;
6794
6795 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6796 return;
6797
6798 if (fan_watchdog_active)
6799 cancel_delayed_work(&fan_watchdog_task);
6800
6801 if (fan_watchdog_maxinterval > 0 &&
6802 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6803 fan_watchdog_active = 1;
6804 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6805 msecs_to_jiffies(fan_watchdog_maxinterval
6806 * 1000))) {
6807 printk(TPACPI_ERR
6808 "failed to queue the fan watchdog, "
6809 "watchdog will not trigger\n");
6810 }
6811 } else
6812 fan_watchdog_active = 0;
6813 }
6814
6815 static void fan_watchdog_fire(struct work_struct *ignored)
6816 {
6817 int rc;
6818
6819 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6820 return;
6821
6822 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6823 rc = fan_set_enable();
6824 if (rc < 0) {
6825 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6826 "will try again later...\n", -rc);
6827 /* reschedule for later */
6828 fan_watchdog_reset();
6829 }
6830 }
6831
6832 /*
6833 * SYSFS fan layout: hwmon compatible (device)
6834 *
6835 * pwm*_enable:
6836 * 0: "disengaged" mode
6837 * 1: manual mode
6838 * 2: native EC "auto" mode (recommended, hardware default)
6839 *
6840 * pwm*: set speed in manual mode, ignored otherwise.
6841 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6842 * interpolation.
6843 *
6844 * fan*_input: tachometer reading, RPM
6845 *
6846 *
6847 * SYSFS fan layout: extensions
6848 *
6849 * fan_watchdog (driver):
6850 * fan watchdog interval in seconds, 0 disables (default), max 120
6851 */
6852
6853 /* sysfs fan pwm1_enable ----------------------------------------------- */
6854 static ssize_t fan_pwm1_enable_show(struct device *dev,
6855 struct device_attribute *attr,
6856 char *buf)
6857 {
6858 int res, mode;
6859 u8 status;
6860
6861 res = fan_get_status_safe(&status);
6862 if (res)
6863 return res;
6864
6865 if (status & TP_EC_FAN_FULLSPEED) {
6866 mode = 0;
6867 } else if (status & TP_EC_FAN_AUTO) {
6868 mode = 2;
6869 } else
6870 mode = 1;
6871
6872 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6873 }
6874
6875 static ssize_t fan_pwm1_enable_store(struct device *dev,
6876 struct device_attribute *attr,
6877 const char *buf, size_t count)
6878 {
6879 unsigned long t;
6880 int res, level;
6881
6882 if (parse_strtoul(buf, 2, &t))
6883 return -EINVAL;
6884
6885 tpacpi_disclose_usertask("hwmon pwm1_enable",
6886 "set fan mode to %lu\n", t);
6887
6888 switch (t) {
6889 case 0:
6890 level = TP_EC_FAN_FULLSPEED;
6891 break;
6892 case 1:
6893 level = TPACPI_FAN_LAST_LEVEL;
6894 break;
6895 case 2:
6896 level = TP_EC_FAN_AUTO;
6897 break;
6898 case 3:
6899 /* reserved for software-controlled auto mode */
6900 return -ENOSYS;
6901 default:
6902 return -EINVAL;
6903 }
6904
6905 res = fan_set_level_safe(level);
6906 if (res == -ENXIO)
6907 return -EINVAL;
6908 else if (res < 0)
6909 return res;
6910
6911 fan_watchdog_reset();
6912
6913 return count;
6914 }
6915
6916 static struct device_attribute dev_attr_fan_pwm1_enable =
6917 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6918 fan_pwm1_enable_show, fan_pwm1_enable_store);
6919
6920 /* sysfs fan pwm1 ------------------------------------------------------ */
6921 static ssize_t fan_pwm1_show(struct device *dev,
6922 struct device_attribute *attr,
6923 char *buf)
6924 {
6925 int res;
6926 u8 status;
6927
6928 res = fan_get_status_safe(&status);
6929 if (res)
6930 return res;
6931
6932 if ((status &
6933 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6934 status = fan_control_desired_level;
6935
6936 if (status > 7)
6937 status = 7;
6938
6939 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6940 }
6941
6942 static ssize_t fan_pwm1_store(struct device *dev,
6943 struct device_attribute *attr,
6944 const char *buf, size_t count)
6945 {
6946 unsigned long s;
6947 int rc;
6948 u8 status, newlevel;
6949
6950 if (parse_strtoul(buf, 255, &s))
6951 return -EINVAL;
6952
6953 tpacpi_disclose_usertask("hwmon pwm1",
6954 "set fan speed to %lu\n", s);
6955
6956 /* scale down from 0-255 to 0-7 */
6957 newlevel = (s >> 5) & 0x07;
6958
6959 if (mutex_lock_killable(&fan_mutex))
6960 return -ERESTARTSYS;
6961
6962 rc = fan_get_status(&status);
6963 if (!rc && (status &
6964 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6965 rc = fan_set_level(newlevel);
6966 if (rc == -ENXIO)
6967 rc = -EINVAL;
6968 else if (!rc) {
6969 fan_update_desired_level(newlevel);
6970 fan_watchdog_reset();
6971 }
6972 }
6973
6974 mutex_unlock(&fan_mutex);
6975 return (rc)? rc : count;
6976 }
6977
6978 static struct device_attribute dev_attr_fan_pwm1 =
6979 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6980 fan_pwm1_show, fan_pwm1_store);
6981
6982 /* sysfs fan fan1_input ------------------------------------------------ */
6983 static ssize_t fan_fan1_input_show(struct device *dev,
6984 struct device_attribute *attr,
6985 char *buf)
6986 {
6987 int res;
6988 unsigned int speed;
6989
6990 res = fan_get_speed(&speed);
6991 if (res < 0)
6992 return res;
6993
6994 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6995 }
6996
6997 static struct device_attribute dev_attr_fan_fan1_input =
6998 __ATTR(fan1_input, S_IRUGO,
6999 fan_fan1_input_show, NULL);
7000
7001 /* sysfs fan fan2_input ------------------------------------------------ */
7002 static ssize_t fan_fan2_input_show(struct device *dev,
7003 struct device_attribute *attr,
7004 char *buf)
7005 {
7006 int res;
7007 unsigned int speed;
7008
7009 res = fan2_get_speed(&speed);
7010 if (res < 0)
7011 return res;
7012
7013 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7014 }
7015
7016 static struct device_attribute dev_attr_fan_fan2_input =
7017 __ATTR(fan2_input, S_IRUGO,
7018 fan_fan2_input_show, NULL);
7019
7020 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7021 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7022 char *buf)
7023 {
7024 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7025 }
7026
7027 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7028 const char *buf, size_t count)
7029 {
7030 unsigned long t;
7031
7032 if (parse_strtoul(buf, 120, &t))
7033 return -EINVAL;
7034
7035 if (!fan_control_allowed)
7036 return -EPERM;
7037
7038 fan_watchdog_maxinterval = t;
7039 fan_watchdog_reset();
7040
7041 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7042
7043 return count;
7044 }
7045
7046 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7047 fan_fan_watchdog_show, fan_fan_watchdog_store);
7048
7049 /* --------------------------------------------------------------------- */
7050 static struct attribute *fan_attributes[] = {
7051 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7052 &dev_attr_fan_fan1_input.attr,
7053 NULL, /* for fan2_input */
7054 NULL
7055 };
7056
7057 static const struct attribute_group fan_attr_group = {
7058 .attrs = fan_attributes,
7059 };
7060
7061 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7062 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7063
7064 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7065 { .vendor = PCI_VENDOR_ID_IBM, \
7066 .bios = TPACPI_MATCH_ANY, \
7067 .ec = TPID(__id1, __id2), \
7068 .quirks = __quirks }
7069
7070 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7071 { .vendor = PCI_VENDOR_ID_LENOVO, \
7072 .bios = TPACPI_MATCH_ANY, \
7073 .ec = TPID(__id1, __id2), \
7074 .quirks = __quirks }
7075
7076 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7077 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7078 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7079 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7080 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7081 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7082 };
7083
7084 #undef TPACPI_FAN_QL
7085 #undef TPACPI_FAN_QI
7086
7087 static int __init fan_init(struct ibm_init_struct *iibm)
7088 {
7089 int rc;
7090 unsigned long quirks;
7091
7092 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7093 "initializing fan subdriver\n");
7094
7095 mutex_init(&fan_mutex);
7096 fan_status_access_mode = TPACPI_FAN_NONE;
7097 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7098 fan_control_commands = 0;
7099 fan_watchdog_maxinterval = 0;
7100 tp_features.fan_ctrl_status_undef = 0;
7101 tp_features.second_fan = 0;
7102 fan_control_desired_level = 7;
7103
7104 TPACPI_ACPIHANDLE_INIT(fans);
7105 TPACPI_ACPIHANDLE_INIT(gfan);
7106 TPACPI_ACPIHANDLE_INIT(sfan);
7107
7108 quirks = tpacpi_check_quirks(fan_quirk_table,
7109 ARRAY_SIZE(fan_quirk_table));
7110
7111 if (gfan_handle) {
7112 /* 570, 600e/x, 770e, 770x */
7113 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7114 } else {
7115 /* all other ThinkPads: note that even old-style
7116 * ThinkPad ECs supports the fan control register */
7117 if (likely(acpi_ec_read(fan_status_offset,
7118 &fan_control_initial_status))) {
7119 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7120 if (quirks & TPACPI_FAN_Q1)
7121 fan_quirk1_setup();
7122 if (quirks & TPACPI_FAN_2FAN) {
7123 tp_features.second_fan = 1;
7124 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7125 "secondary fan support enabled\n");
7126 }
7127 } else {
7128 printk(TPACPI_ERR
7129 "ThinkPad ACPI EC access misbehaving, "
7130 "fan status and control unavailable\n");
7131 return 1;
7132 }
7133 }
7134
7135 if (sfan_handle) {
7136 /* 570, 770x-JL */
7137 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7138 fan_control_commands |=
7139 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7140 } else {
7141 if (!gfan_handle) {
7142 /* gfan without sfan means no fan control */
7143 /* all other models implement TP EC 0x2f control */
7144
7145 if (fans_handle) {
7146 /* X31, X40, X41 */
7147 fan_control_access_mode =
7148 TPACPI_FAN_WR_ACPI_FANS;
7149 fan_control_commands |=
7150 TPACPI_FAN_CMD_SPEED |
7151 TPACPI_FAN_CMD_LEVEL |
7152 TPACPI_FAN_CMD_ENABLE;
7153 } else {
7154 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7155 fan_control_commands |=
7156 TPACPI_FAN_CMD_LEVEL |
7157 TPACPI_FAN_CMD_ENABLE;
7158 }
7159 }
7160 }
7161
7162 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7163 "fan is %s, modes %d, %d\n",
7164 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7165 fan_control_access_mode != TPACPI_FAN_WR_NONE),
7166 fan_status_access_mode, fan_control_access_mode);
7167
7168 /* fan control master switch */
7169 if (!fan_control_allowed) {
7170 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7171 fan_control_commands = 0;
7172 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7173 "fan control features disabled by parameter\n");
7174 }
7175
7176 /* update fan_control_desired_level */
7177 if (fan_status_access_mode != TPACPI_FAN_NONE)
7178 fan_get_status_safe(NULL);
7179
7180 if (fan_status_access_mode != TPACPI_FAN_NONE ||
7181 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7182 if (tp_features.second_fan) {
7183 /* attach second fan tachometer */
7184 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7185 &dev_attr_fan_fan2_input.attr;
7186 }
7187 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7188 &fan_attr_group);
7189 if (rc < 0)
7190 return rc;
7191
7192 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7193 &driver_attr_fan_watchdog);
7194 if (rc < 0) {
7195 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7196 &fan_attr_group);
7197 return rc;
7198 }
7199 return 0;
7200 } else
7201 return 1;
7202 }
7203
7204 static void fan_exit(void)
7205 {
7206 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7207 "cancelling any pending fan watchdog tasks\n");
7208
7209 /* FIXME: can we really do this unconditionally? */
7210 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7211 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7212 &driver_attr_fan_watchdog);
7213
7214 cancel_delayed_work(&fan_watchdog_task);
7215 flush_workqueue(tpacpi_wq);
7216 }
7217
7218 static void fan_suspend(pm_message_t state)
7219 {
7220 int rc;
7221
7222 if (!fan_control_allowed)
7223 return;
7224
7225 /* Store fan status in cache */
7226 fan_control_resume_level = 0;
7227 rc = fan_get_status_safe(&fan_control_resume_level);
7228 if (rc < 0)
7229 printk(TPACPI_NOTICE
7230 "failed to read fan level for later "
7231 "restore during resume: %d\n", rc);
7232
7233 /* if it is undefined, don't attempt to restore it.
7234 * KEEP THIS LAST */
7235 if (tp_features.fan_ctrl_status_undef)
7236 fan_control_resume_level = 0;
7237 }
7238
7239 static void fan_resume(void)
7240 {
7241 u8 current_level = 7;
7242 bool do_set = false;
7243 int rc;
7244
7245 /* DSDT *always* updates status on resume */
7246 tp_features.fan_ctrl_status_undef = 0;
7247
7248 if (!fan_control_allowed ||
7249 !fan_control_resume_level ||
7250 (fan_get_status_safe(&current_level) < 0))
7251 return;
7252
7253 switch (fan_control_access_mode) {
7254 case TPACPI_FAN_WR_ACPI_SFAN:
7255 /* never decrease fan level */
7256 do_set = (fan_control_resume_level > current_level);
7257 break;
7258 case TPACPI_FAN_WR_ACPI_FANS:
7259 case TPACPI_FAN_WR_TPEC:
7260 /* never decrease fan level, scale is:
7261 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7262 *
7263 * We expect the firmware to set either 7 or AUTO, but we
7264 * handle FULLSPEED out of paranoia.
7265 *
7266 * So, we can safely only restore FULLSPEED or 7, anything
7267 * else could slow the fan. Restoring AUTO is useless, at
7268 * best that's exactly what the DSDT already set (it is the
7269 * slower it uses).
7270 *
7271 * Always keep in mind that the DSDT *will* have set the
7272 * fans to what the vendor supposes is the best level. We
7273 * muck with it only to speed the fan up.
7274 */
7275 if (fan_control_resume_level != 7 &&
7276 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7277 return;
7278 else
7279 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7280 (current_level != fan_control_resume_level);
7281 break;
7282 default:
7283 return;
7284 }
7285 if (do_set) {
7286 printk(TPACPI_NOTICE
7287 "restoring fan level to 0x%02x\n",
7288 fan_control_resume_level);
7289 rc = fan_set_level_safe(fan_control_resume_level);
7290 if (rc < 0)
7291 printk(TPACPI_NOTICE
7292 "failed to restore fan level: %d\n", rc);
7293 }
7294 }
7295
7296 static int fan_read(char *p)
7297 {
7298 int len = 0;
7299 int rc;
7300 u8 status;
7301 unsigned int speed = 0;
7302
7303 switch (fan_status_access_mode) {
7304 case TPACPI_FAN_RD_ACPI_GFAN:
7305 /* 570, 600e/x, 770e, 770x */
7306 rc = fan_get_status_safe(&status);
7307 if (rc < 0)
7308 return rc;
7309
7310 len += sprintf(p + len, "status:\t\t%s\n"
7311 "level:\t\t%d\n",
7312 (status != 0) ? "enabled" : "disabled", status);
7313 break;
7314
7315 case TPACPI_FAN_RD_TPEC:
7316 /* all except 570, 600e/x, 770e, 770x */
7317 rc = fan_get_status_safe(&status);
7318 if (rc < 0)
7319 return rc;
7320
7321 len += sprintf(p + len, "status:\t\t%s\n",
7322 (status != 0) ? "enabled" : "disabled");
7323
7324 rc = fan_get_speed(&speed);
7325 if (rc < 0)
7326 return rc;
7327
7328 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7329
7330 if (status & TP_EC_FAN_FULLSPEED)
7331 /* Disengaged mode takes precedence */
7332 len += sprintf(p + len, "level:\t\tdisengaged\n");
7333 else if (status & TP_EC_FAN_AUTO)
7334 len += sprintf(p + len, "level:\t\tauto\n");
7335 else
7336 len += sprintf(p + len, "level:\t\t%d\n", status);
7337 break;
7338
7339 case TPACPI_FAN_NONE:
7340 default:
7341 len += sprintf(p + len, "status:\t\tnot supported\n");
7342 }
7343
7344 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7345 len += sprintf(p + len, "commands:\tlevel <level>");
7346
7347 switch (fan_control_access_mode) {
7348 case TPACPI_FAN_WR_ACPI_SFAN:
7349 len += sprintf(p + len, " (<level> is 0-7)\n");
7350 break;
7351
7352 default:
7353 len += sprintf(p + len, " (<level> is 0-7, "
7354 "auto, disengaged, full-speed)\n");
7355 break;
7356 }
7357 }
7358
7359 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7360 len += sprintf(p + len, "commands:\tenable, disable\n"
7361 "commands:\twatchdog <timeout> (<timeout> "
7362 "is 0 (off), 1-120 (seconds))\n");
7363
7364 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7365 len += sprintf(p + len, "commands:\tspeed <speed>"
7366 " (<speed> is 0-65535)\n");
7367
7368 return len;
7369 }
7370
7371 static int fan_write_cmd_level(const char *cmd, int *rc)
7372 {
7373 int level;
7374
7375 if (strlencmp(cmd, "level auto") == 0)
7376 level = TP_EC_FAN_AUTO;
7377 else if ((strlencmp(cmd, "level disengaged") == 0) |
7378 (strlencmp(cmd, "level full-speed") == 0))
7379 level = TP_EC_FAN_FULLSPEED;
7380 else if (sscanf(cmd, "level %d", &level) != 1)
7381 return 0;
7382
7383 *rc = fan_set_level_safe(level);
7384 if (*rc == -ENXIO)
7385 printk(TPACPI_ERR "level command accepted for unsupported "
7386 "access mode %d", fan_control_access_mode);
7387 else if (!*rc)
7388 tpacpi_disclose_usertask("procfs fan",
7389 "set level to %d\n", level);
7390
7391 return 1;
7392 }
7393
7394 static int fan_write_cmd_enable(const char *cmd, int *rc)
7395 {
7396 if (strlencmp(cmd, "enable") != 0)
7397 return 0;
7398
7399 *rc = fan_set_enable();
7400 if (*rc == -ENXIO)
7401 printk(TPACPI_ERR "enable command accepted for unsupported "
7402 "access mode %d", fan_control_access_mode);
7403 else if (!*rc)
7404 tpacpi_disclose_usertask("procfs fan", "enable\n");
7405
7406 return 1;
7407 }
7408
7409 static int fan_write_cmd_disable(const char *cmd, int *rc)
7410 {
7411 if (strlencmp(cmd, "disable") != 0)
7412 return 0;
7413
7414 *rc = fan_set_disable();
7415 if (*rc == -ENXIO)
7416 printk(TPACPI_ERR "disable command accepted for unsupported "
7417 "access mode %d", fan_control_access_mode);
7418 else if (!*rc)
7419 tpacpi_disclose_usertask("procfs fan", "disable\n");
7420
7421 return 1;
7422 }
7423
7424 static int fan_write_cmd_speed(const char *cmd, int *rc)
7425 {
7426 int speed;
7427
7428 /* TODO:
7429 * Support speed <low> <medium> <high> ? */
7430
7431 if (sscanf(cmd, "speed %d", &speed) != 1)
7432 return 0;
7433
7434 *rc = fan_set_speed(speed);
7435 if (*rc == -ENXIO)
7436 printk(TPACPI_ERR "speed command accepted for unsupported "
7437 "access mode %d", fan_control_access_mode);
7438 else if (!*rc)
7439 tpacpi_disclose_usertask("procfs fan",
7440 "set speed to %d\n", speed);
7441
7442 return 1;
7443 }
7444
7445 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7446 {
7447 int interval;
7448
7449 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7450 return 0;
7451
7452 if (interval < 0 || interval > 120)
7453 *rc = -EINVAL;
7454 else {
7455 fan_watchdog_maxinterval = interval;
7456 tpacpi_disclose_usertask("procfs fan",
7457 "set watchdog timer to %d\n",
7458 interval);
7459 }
7460
7461 return 1;
7462 }
7463
7464 static int fan_write(char *buf)
7465 {
7466 char *cmd;
7467 int rc = 0;
7468
7469 while (!rc && (cmd = next_cmd(&buf))) {
7470 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7471 fan_write_cmd_level(cmd, &rc)) &&
7472 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7473 (fan_write_cmd_enable(cmd, &rc) ||
7474 fan_write_cmd_disable(cmd, &rc) ||
7475 fan_write_cmd_watchdog(cmd, &rc))) &&
7476 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7477 fan_write_cmd_speed(cmd, &rc))
7478 )
7479 rc = -EINVAL;
7480 else if (!rc)
7481 fan_watchdog_reset();
7482 }
7483
7484 return rc;
7485 }
7486
7487 static struct ibm_struct fan_driver_data = {
7488 .name = "fan",
7489 .read = fan_read,
7490 .write = fan_write,
7491 .exit = fan_exit,
7492 .suspend = fan_suspend,
7493 .resume = fan_resume,
7494 };
7495
7496 /****************************************************************************
7497 ****************************************************************************
7498 *
7499 * Infrastructure
7500 *
7501 ****************************************************************************
7502 ****************************************************************************/
7503
7504 /* sysfs name ---------------------------------------------------------- */
7505 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7506 struct device_attribute *attr,
7507 char *buf)
7508 {
7509 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7510 }
7511
7512 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7513 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7514
7515 /* --------------------------------------------------------------------- */
7516
7517 /* /proc support */
7518 static struct proc_dir_entry *proc_dir;
7519
7520 /*
7521 * Module and infrastructure proble, init and exit handling
7522 */
7523
7524 static int force_load;
7525
7526 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7527 static const char * __init str_supported(int is_supported)
7528 {
7529 static char text_unsupported[] __initdata = "not supported";
7530
7531 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7532 }
7533 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7534
7535 static void ibm_exit(struct ibm_struct *ibm)
7536 {
7537 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7538
7539 list_del_init(&ibm->all_drivers);
7540
7541 if (ibm->flags.acpi_notify_installed) {
7542 dbg_printk(TPACPI_DBG_EXIT,
7543 "%s: acpi_remove_notify_handler\n", ibm->name);
7544 BUG_ON(!ibm->acpi);
7545 acpi_remove_notify_handler(*ibm->acpi->handle,
7546 ibm->acpi->type,
7547 dispatch_acpi_notify);
7548 ibm->flags.acpi_notify_installed = 0;
7549 ibm->flags.acpi_notify_installed = 0;
7550 }
7551
7552 if (ibm->flags.proc_created) {
7553 dbg_printk(TPACPI_DBG_EXIT,
7554 "%s: remove_proc_entry\n", ibm->name);
7555 remove_proc_entry(ibm->name, proc_dir);
7556 ibm->flags.proc_created = 0;
7557 }
7558
7559 if (ibm->flags.acpi_driver_registered) {
7560 dbg_printk(TPACPI_DBG_EXIT,
7561 "%s: acpi_bus_unregister_driver\n", ibm->name);
7562 BUG_ON(!ibm->acpi);
7563 acpi_bus_unregister_driver(ibm->acpi->driver);
7564 kfree(ibm->acpi->driver);
7565 ibm->acpi->driver = NULL;
7566 ibm->flags.acpi_driver_registered = 0;
7567 }
7568
7569 if (ibm->flags.init_called && ibm->exit) {
7570 ibm->exit();
7571 ibm->flags.init_called = 0;
7572 }
7573
7574 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7575 }
7576
7577 static int __init ibm_init(struct ibm_init_struct *iibm)
7578 {
7579 int ret;
7580 struct ibm_struct *ibm = iibm->data;
7581 struct proc_dir_entry *entry;
7582
7583 BUG_ON(ibm == NULL);
7584
7585 INIT_LIST_HEAD(&ibm->all_drivers);
7586
7587 if (ibm->flags.experimental && !experimental)
7588 return 0;
7589
7590 dbg_printk(TPACPI_DBG_INIT,
7591 "probing for %s\n", ibm->name);
7592
7593 if (iibm->init) {
7594 ret = iibm->init(iibm);
7595 if (ret > 0)
7596 return 0; /* probe failed */
7597 if (ret)
7598 return ret;
7599
7600 ibm->flags.init_called = 1;
7601 }
7602
7603 if (ibm->acpi) {
7604 if (ibm->acpi->hid) {
7605 ret = register_tpacpi_subdriver(ibm);
7606 if (ret)
7607 goto err_out;
7608 }
7609
7610 if (ibm->acpi->notify) {
7611 ret = setup_acpi_notify(ibm);
7612 if (ret == -ENODEV) {
7613 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7614 ibm->name);
7615 ret = 0;
7616 goto err_out;
7617 }
7618 if (ret < 0)
7619 goto err_out;
7620 }
7621 }
7622
7623 dbg_printk(TPACPI_DBG_INIT,
7624 "%s installed\n", ibm->name);
7625
7626 if (ibm->read) {
7627 entry = create_proc_entry(ibm->name,
7628 S_IFREG | S_IRUGO | S_IWUSR,
7629 proc_dir);
7630 if (!entry) {
7631 printk(TPACPI_ERR "unable to create proc entry %s\n",
7632 ibm->name);
7633 ret = -ENODEV;
7634 goto err_out;
7635 }
7636 entry->data = ibm;
7637 entry->read_proc = &dispatch_procfs_read;
7638 if (ibm->write)
7639 entry->write_proc = &dispatch_procfs_write;
7640 ibm->flags.proc_created = 1;
7641 }
7642
7643 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7644
7645 return 0;
7646
7647 err_out:
7648 dbg_printk(TPACPI_DBG_INIT,
7649 "%s: at error exit path with result %d\n",
7650 ibm->name, ret);
7651
7652 ibm_exit(ibm);
7653 return (ret < 0)? ret : 0;
7654 }
7655
7656 /* Probing */
7657
7658 static bool __pure __init tpacpi_is_fw_digit(const char c)
7659 {
7660 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7661 }
7662
7663 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7664 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7665 const char t)
7666 {
7667 return s && strlen(s) >= 8 &&
7668 tpacpi_is_fw_digit(s[0]) &&
7669 tpacpi_is_fw_digit(s[1]) &&
7670 s[2] == t && s[3] == 'T' &&
7671 tpacpi_is_fw_digit(s[4]) &&
7672 tpacpi_is_fw_digit(s[5]) &&
7673 s[6] == 'W' && s[7] == 'W';
7674 }
7675
7676 /* returns 0 - probe ok, or < 0 - probe error.
7677 * Probe ok doesn't mean thinkpad found.
7678 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7679 static int __must_check __init get_thinkpad_model_data(
7680 struct thinkpad_id_data *tp)
7681 {
7682 const struct dmi_device *dev = NULL;
7683 char ec_fw_string[18];
7684 char const *s;
7685
7686 if (!tp)
7687 return -EINVAL;
7688
7689 memset(tp, 0, sizeof(*tp));
7690
7691 if (dmi_name_in_vendors("IBM"))
7692 tp->vendor = PCI_VENDOR_ID_IBM;
7693 else if (dmi_name_in_vendors("LENOVO"))
7694 tp->vendor = PCI_VENDOR_ID_LENOVO;
7695 else
7696 return 0;
7697
7698 s = dmi_get_system_info(DMI_BIOS_VERSION);
7699 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7700 if (s && !tp->bios_version_str)
7701 return -ENOMEM;
7702
7703 /* Really ancient ThinkPad 240X will fail this, which is fine */
7704 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7705 return 0;
7706
7707 tp->bios_model = tp->bios_version_str[0]
7708 | (tp->bios_version_str[1] << 8);
7709 tp->bios_release = (tp->bios_version_str[4] << 8)
7710 | tp->bios_version_str[5];
7711
7712 /*
7713 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7714 * X32 or newer, all Z series; Some models must have an
7715 * up-to-date BIOS or they will not be detected.
7716 *
7717 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7718 */
7719 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7720 if (sscanf(dev->name,
7721 "IBM ThinkPad Embedded Controller -[%17c",
7722 ec_fw_string) == 1) {
7723 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7724 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7725
7726 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7727 if (!tp->ec_version_str)
7728 return -ENOMEM;
7729
7730 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7731 tp->ec_model = ec_fw_string[0]
7732 | (ec_fw_string[1] << 8);
7733 tp->ec_release = (ec_fw_string[4] << 8)
7734 | ec_fw_string[5];
7735 } else {
7736 printk(TPACPI_NOTICE
7737 "ThinkPad firmware release %s "
7738 "doesn't match the known patterns\n",
7739 ec_fw_string);
7740 printk(TPACPI_NOTICE
7741 "please report this to %s\n",
7742 TPACPI_MAIL);
7743 }
7744 break;
7745 }
7746 }
7747
7748 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7749 if (s && !strnicmp(s, "ThinkPad", 8)) {
7750 tp->model_str = kstrdup(s, GFP_KERNEL);
7751 if (!tp->model_str)
7752 return -ENOMEM;
7753 }
7754
7755 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7756 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7757 if (s && !tp->nummodel_str)
7758 return -ENOMEM;
7759
7760 return 0;
7761 }
7762
7763 static int __init probe_for_thinkpad(void)
7764 {
7765 int is_thinkpad;
7766
7767 if (acpi_disabled)
7768 return -ENODEV;
7769
7770 /*
7771 * Non-ancient models have better DMI tagging, but very old models
7772 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
7773 */
7774 is_thinkpad = (thinkpad_id.model_str != NULL) ||
7775 (thinkpad_id.ec_model != 0) ||
7776 tpacpi_is_fw_known();
7777
7778 /* ec is required because many other handles are relative to it */
7779 TPACPI_ACPIHANDLE_INIT(ec);
7780 if (!ec_handle) {
7781 if (is_thinkpad)
7782 printk(TPACPI_ERR
7783 "Not yet supported ThinkPad detected!\n");
7784 return -ENODEV;
7785 }
7786
7787 if (!is_thinkpad && !force_load)
7788 return -ENODEV;
7789
7790 return 0;
7791 }
7792
7793
7794 /* Module init, exit, parameters */
7795
7796 static struct ibm_init_struct ibms_init[] __initdata = {
7797 {
7798 .init = thinkpad_acpi_driver_init,
7799 .data = &thinkpad_acpi_driver_data,
7800 },
7801 {
7802 .init = hotkey_init,
7803 .data = &hotkey_driver_data,
7804 },
7805 {
7806 .init = bluetooth_init,
7807 .data = &bluetooth_driver_data,
7808 },
7809 {
7810 .init = wan_init,
7811 .data = &wan_driver_data,
7812 },
7813 {
7814 .init = uwb_init,
7815 .data = &uwb_driver_data,
7816 },
7817 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7818 {
7819 .init = video_init,
7820 .data = &video_driver_data,
7821 },
7822 #endif
7823 {
7824 .init = light_init,
7825 .data = &light_driver_data,
7826 },
7827 {
7828 .init = cmos_init,
7829 .data = &cmos_driver_data,
7830 },
7831 {
7832 .init = led_init,
7833 .data = &led_driver_data,
7834 },
7835 {
7836 .init = beep_init,
7837 .data = &beep_driver_data,
7838 },
7839 {
7840 .init = thermal_init,
7841 .data = &thermal_driver_data,
7842 },
7843 {
7844 .data = &ecdump_driver_data,
7845 },
7846 {
7847 .init = brightness_init,
7848 .data = &brightness_driver_data,
7849 },
7850 {
7851 .data = &volume_driver_data,
7852 },
7853 {
7854 .init = fan_init,
7855 .data = &fan_driver_data,
7856 },
7857 };
7858
7859 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7860 {
7861 unsigned int i;
7862 struct ibm_struct *ibm;
7863
7864 if (!kp || !kp->name || !val)
7865 return -EINVAL;
7866
7867 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7868 ibm = ibms_init[i].data;
7869 WARN_ON(ibm == NULL);
7870
7871 if (!ibm || !ibm->name)
7872 continue;
7873
7874 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7875 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7876 return -ENOSPC;
7877 strcpy(ibms_init[i].param, val);
7878 strcat(ibms_init[i].param, ",");
7879 return 0;
7880 }
7881 }
7882
7883 return -EINVAL;
7884 }
7885
7886 module_param(experimental, int, 0);
7887 MODULE_PARM_DESC(experimental,
7888 "Enables experimental features when non-zero");
7889
7890 module_param_named(debug, dbg_level, uint, 0);
7891 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7892
7893 module_param(force_load, bool, 0);
7894 MODULE_PARM_DESC(force_load,
7895 "Attempts to load the driver even on a "
7896 "mis-identified ThinkPad when true");
7897
7898 module_param_named(fan_control, fan_control_allowed, bool, 0);
7899 MODULE_PARM_DESC(fan_control,
7900 "Enables setting fan parameters features when true");
7901
7902 module_param_named(brightness_mode, brightness_mode, uint, 0);
7903 MODULE_PARM_DESC(brightness_mode,
7904 "Selects brightness control strategy: "
7905 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7906
7907 module_param(brightness_enable, uint, 0);
7908 MODULE_PARM_DESC(brightness_enable,
7909 "Enables backlight control when 1, disables when 0");
7910
7911 module_param(hotkey_report_mode, uint, 0);
7912 MODULE_PARM_DESC(hotkey_report_mode,
7913 "used for backwards compatibility with userspace, "
7914 "see documentation");
7915
7916 #define TPACPI_PARAM(feature) \
7917 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7918 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7919 "at module load, see documentation")
7920
7921 TPACPI_PARAM(hotkey);
7922 TPACPI_PARAM(bluetooth);
7923 TPACPI_PARAM(video);
7924 TPACPI_PARAM(light);
7925 TPACPI_PARAM(cmos);
7926 TPACPI_PARAM(led);
7927 TPACPI_PARAM(beep);
7928 TPACPI_PARAM(ecdump);
7929 TPACPI_PARAM(brightness);
7930 TPACPI_PARAM(volume);
7931 TPACPI_PARAM(fan);
7932
7933 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7934 module_param(dbg_wlswemul, uint, 0);
7935 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7936 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7937 MODULE_PARM_DESC(wlsw_state,
7938 "Initial state of the emulated WLSW switch");
7939
7940 module_param(dbg_bluetoothemul, uint, 0);
7941 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7942 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7943 MODULE_PARM_DESC(bluetooth_state,
7944 "Initial state of the emulated bluetooth switch");
7945
7946 module_param(dbg_wwanemul, uint, 0);
7947 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7948 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7949 MODULE_PARM_DESC(wwan_state,
7950 "Initial state of the emulated WWAN switch");
7951
7952 module_param(dbg_uwbemul, uint, 0);
7953 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7954 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7955 MODULE_PARM_DESC(uwb_state,
7956 "Initial state of the emulated UWB switch");
7957 #endif
7958
7959 static void thinkpad_acpi_module_exit(void)
7960 {
7961 struct ibm_struct *ibm, *itmp;
7962
7963 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7964
7965 list_for_each_entry_safe_reverse(ibm, itmp,
7966 &tpacpi_all_drivers,
7967 all_drivers) {
7968 ibm_exit(ibm);
7969 }
7970
7971 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7972
7973 if (tpacpi_inputdev) {
7974 if (tp_features.input_device_registered)
7975 input_unregister_device(tpacpi_inputdev);
7976 else
7977 input_free_device(tpacpi_inputdev);
7978 }
7979
7980 if (tpacpi_hwmon)
7981 hwmon_device_unregister(tpacpi_hwmon);
7982
7983 if (tp_features.sensors_pdev_attrs_registered)
7984 device_remove_file(&tpacpi_sensors_pdev->dev,
7985 &dev_attr_thinkpad_acpi_pdev_name);
7986 if (tpacpi_sensors_pdev)
7987 platform_device_unregister(tpacpi_sensors_pdev);
7988 if (tpacpi_pdev)
7989 platform_device_unregister(tpacpi_pdev);
7990
7991 if (tp_features.sensors_pdrv_attrs_registered)
7992 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7993 if (tp_features.platform_drv_attrs_registered)
7994 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7995
7996 if (tp_features.sensors_pdrv_registered)
7997 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7998
7999 if (tp_features.platform_drv_registered)
8000 platform_driver_unregister(&tpacpi_pdriver);
8001
8002 if (proc_dir)
8003 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8004
8005 if (tpacpi_wq)
8006 destroy_workqueue(tpacpi_wq);
8007
8008 kfree(thinkpad_id.bios_version_str);
8009 kfree(thinkpad_id.ec_version_str);
8010 kfree(thinkpad_id.model_str);
8011 }
8012
8013
8014 static int __init thinkpad_acpi_module_init(void)
8015 {
8016 int ret, i;
8017
8018 tpacpi_lifecycle = TPACPI_LIFE_INIT;
8019
8020 /* Parameter checking */
8021 if (hotkey_report_mode > 2)
8022 return -EINVAL;
8023
8024 /* Driver-level probe */
8025
8026 ret = get_thinkpad_model_data(&thinkpad_id);
8027 if (ret) {
8028 printk(TPACPI_ERR
8029 "unable to get DMI data: %d\n", ret);
8030 thinkpad_acpi_module_exit();
8031 return ret;
8032 }
8033 ret = probe_for_thinkpad();
8034 if (ret) {
8035 thinkpad_acpi_module_exit();
8036 return ret;
8037 }
8038
8039 /* Driver initialization */
8040
8041 TPACPI_ACPIHANDLE_INIT(ecrd);
8042 TPACPI_ACPIHANDLE_INIT(ecwr);
8043
8044 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8045 if (!tpacpi_wq) {
8046 thinkpad_acpi_module_exit();
8047 return -ENOMEM;
8048 }
8049
8050 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8051 if (!proc_dir) {
8052 printk(TPACPI_ERR
8053 "unable to create proc dir " TPACPI_PROC_DIR);
8054 thinkpad_acpi_module_exit();
8055 return -ENODEV;
8056 }
8057
8058 ret = platform_driver_register(&tpacpi_pdriver);
8059 if (ret) {
8060 printk(TPACPI_ERR
8061 "unable to register main platform driver\n");
8062 thinkpad_acpi_module_exit();
8063 return ret;
8064 }
8065 tp_features.platform_drv_registered = 1;
8066
8067 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8068 if (ret) {
8069 printk(TPACPI_ERR
8070 "unable to register hwmon platform driver\n");
8071 thinkpad_acpi_module_exit();
8072 return ret;
8073 }
8074 tp_features.sensors_pdrv_registered = 1;
8075
8076 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8077 if (!ret) {
8078 tp_features.platform_drv_attrs_registered = 1;
8079 ret = tpacpi_create_driver_attributes(
8080 &tpacpi_hwmon_pdriver.driver);
8081 }
8082 if (ret) {
8083 printk(TPACPI_ERR
8084 "unable to create sysfs driver attributes\n");
8085 thinkpad_acpi_module_exit();
8086 return ret;
8087 }
8088 tp_features.sensors_pdrv_attrs_registered = 1;
8089
8090
8091 /* Device initialization */
8092 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8093 NULL, 0);
8094 if (IS_ERR(tpacpi_pdev)) {
8095 ret = PTR_ERR(tpacpi_pdev);
8096 tpacpi_pdev = NULL;
8097 printk(TPACPI_ERR "unable to register platform device\n");
8098 thinkpad_acpi_module_exit();
8099 return ret;
8100 }
8101 tpacpi_sensors_pdev = platform_device_register_simple(
8102 TPACPI_HWMON_DRVR_NAME,
8103 -1, NULL, 0);
8104 if (IS_ERR(tpacpi_sensors_pdev)) {
8105 ret = PTR_ERR(tpacpi_sensors_pdev);
8106 tpacpi_sensors_pdev = NULL;
8107 printk(TPACPI_ERR
8108 "unable to register hwmon platform device\n");
8109 thinkpad_acpi_module_exit();
8110 return ret;
8111 }
8112 ret = device_create_file(&tpacpi_sensors_pdev->dev,
8113 &dev_attr_thinkpad_acpi_pdev_name);
8114 if (ret) {
8115 printk(TPACPI_ERR
8116 "unable to create sysfs hwmon device attributes\n");
8117 thinkpad_acpi_module_exit();
8118 return ret;
8119 }
8120 tp_features.sensors_pdev_attrs_registered = 1;
8121 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8122 if (IS_ERR(tpacpi_hwmon)) {
8123 ret = PTR_ERR(tpacpi_hwmon);
8124 tpacpi_hwmon = NULL;
8125 printk(TPACPI_ERR "unable to register hwmon device\n");
8126 thinkpad_acpi_module_exit();
8127 return ret;
8128 }
8129 mutex_init(&tpacpi_inputdev_send_mutex);
8130 tpacpi_inputdev = input_allocate_device();
8131 if (!tpacpi_inputdev) {
8132 printk(TPACPI_ERR "unable to allocate input device\n");
8133 thinkpad_acpi_module_exit();
8134 return -ENOMEM;
8135 } else {
8136 /* Prepare input device, but don't register */
8137 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8138 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8139 tpacpi_inputdev->id.bustype = BUS_HOST;
8140 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8141 thinkpad_id.vendor :
8142 PCI_VENDOR_ID_IBM;
8143 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8144 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8145 }
8146 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8147 ret = ibm_init(&ibms_init[i]);
8148 if (ret >= 0 && *ibms_init[i].param)
8149 ret = ibms_init[i].data->write(ibms_init[i].param);
8150 if (ret < 0) {
8151 thinkpad_acpi_module_exit();
8152 return ret;
8153 }
8154 }
8155 ret = input_register_device(tpacpi_inputdev);
8156 if (ret < 0) {
8157 printk(TPACPI_ERR "unable to register input device\n");
8158 thinkpad_acpi_module_exit();
8159 return ret;
8160 } else {
8161 tp_features.input_device_registered = 1;
8162 }
8163
8164 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8165 return 0;
8166 }
8167
8168 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8169
8170 /*
8171 * This will autoload the driver in almost every ThinkPad
8172 * in widespread use.
8173 *
8174 * Only _VERY_ old models, like the 240, 240x and 570 lack
8175 * the HKEY event interface.
8176 */
8177 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8178
8179 /*
8180 * DMI matching for module autoloading
8181 *
8182 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8183 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8184 *
8185 * Only models listed in thinkwiki will be supported, so add yours
8186 * if it is not there yet.
8187 */
8188 #define IBM_BIOS_MODULE_ALIAS(__type) \
8189 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8190
8191 /* Ancient thinkpad BIOSes have to be identified by
8192 * BIOS type or model number, and there are far less
8193 * BIOS types than model numbers... */
8194 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
8195
8196 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8197 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8198 MODULE_DESCRIPTION(TPACPI_DESC);
8199 MODULE_VERSION(TPACPI_VERSION);
8200 MODULE_LICENSE("GPL");
8201
8202 module_init(thinkpad_acpi_module_init);
8203 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree