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thinkpad-acpi: be more strict when detecting a ThinkPad
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blobd69ab3f0bdbc3c127fb9cec5bd14ec54a57b6828
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define TPACPI_VERSION "0.23"
25 #define TPACPI_SYSFS_VERSION 0x020400
26
27 /*
28 * Changelog:
29 * 2007-10-20 changelog trimmed down
30 *
31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
32 * drivers/misc.
33 *
34 * 2006-11-22 0.13 new maintainer
35 * changelog now lives in git commit history, and will
36 * not be updated further in-file.
37 *
38 * 2005-03-17 0.11 support for 600e, 770x
39 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
40 *
41 * 2005-01-16 0.9 use MODULE_VERSION
42 * thanks to Henrik Brix Andersen <brix@gentoo.org>
43 * fix parameter passing on module loading
44 * thanks to Rusty Russell <rusty@rustcorp.com.au>
45 * thanks to Jim Radford <radford@blackbean.org>
46 * 2004-11-08 0.8 fix init error case, don't return from a macro
47 * thanks to Chris Wright <chrisw@osdl.org>
48 */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/sched.h>
58 #include <linux/kthread.h>
59 #include <linux/freezer.h>
60 #include <linux/delay.h>
61
62 #include <linux/nvram.h>
63 #include <linux/proc_fs.h>
64 #include <linux/sysfs.h>
65 #include <linux/backlight.h>
66 #include <linux/fb.h>
67 #include <linux/platform_device.h>
68 #include <linux/hwmon.h>
69 #include <linux/hwmon-sysfs.h>
70 #include <linux/input.h>
71 #include <linux/leds.h>
72 #include <linux/rfkill.h>
73 #include <asm/uaccess.h>
74
75 #include <linux/dmi.h>
76 #include <linux/jiffies.h>
77 #include <linux/workqueue.h>
78
79 #include <acpi/acpi_drivers.h>
80
81 #include <linux/pci_ids.h>
82
83
84 /* ThinkPad CMOS commands */
85 #define TP_CMOS_VOLUME_DOWN 0
86 #define TP_CMOS_VOLUME_UP 1
87 #define TP_CMOS_VOLUME_MUTE 2
88 #define TP_CMOS_BRIGHTNESS_UP 4
89 #define TP_CMOS_BRIGHTNESS_DOWN 5
90 #define TP_CMOS_THINKLIGHT_ON 12
91 #define TP_CMOS_THINKLIGHT_OFF 13
92
93 /* NVRAM Addresses */
94 enum tp_nvram_addr {
95 TP_NVRAM_ADDR_HK2 = 0x57,
96 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
97 TP_NVRAM_ADDR_VIDEO = 0x59,
98 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
99 TP_NVRAM_ADDR_MIXER = 0x60,
100 };
101
102 /* NVRAM bit masks */
103 enum {
104 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
105 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
106 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
107 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
108 TP_NVRAM_MASK_THINKLIGHT = 0x10,
109 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
110 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
111 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
112 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
113 TP_NVRAM_MASK_MUTE = 0x40,
114 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
115 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
116 TP_NVRAM_POS_LEVEL_VOLUME = 0,
117 };
118
119 /* ACPI HIDs */
120 #define TPACPI_ACPI_HKEY_HID "IBM0068"
121
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION 0x4101
125
126 /* ACPI \WGSV commands */
127 enum {
128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
132 };
133
134 /* TP_ACPI_WGSV_GET_STATE bits */
135 enum {
136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
146 };
147
148 /****************************************************************************
149 * Main driver
150 */
151
152 #define TPACPI_NAME "thinkpad"
153 #define TPACPI_DESC "ThinkPad ACPI Extras"
154 #define TPACPI_FILE TPACPI_NAME "_acpi"
155 #define TPACPI_URL "http://ibm-acpi.sf.net/"
156 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
157
158 #define TPACPI_PROC_DIR "ibm"
159 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
160 #define TPACPI_DRVR_NAME TPACPI_FILE
161 #define TPACPI_DRVR_SHORTNAME "tpacpi"
162 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
163
164 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
165 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
166
167 #define TPACPI_MAX_ACPI_ARGS 3
168
169 /* printk headers */
170 #define TPACPI_LOG TPACPI_FILE ": "
171 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
172 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
173 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
174 #define TPACPI_ERR KERN_ERR TPACPI_LOG
175 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
176 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
177 #define TPACPI_INFO KERN_INFO TPACPI_LOG
178 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
179
180 /* Debugging printk groups */
181 #define TPACPI_DBG_ALL 0xffff
182 #define TPACPI_DBG_DISCLOSETASK 0x8000
183 #define TPACPI_DBG_INIT 0x0001
184 #define TPACPI_DBG_EXIT 0x0002
185 #define TPACPI_DBG_RFKILL 0x0004
186 #define TPACPI_DBG_HKEY 0x0008
187 #define TPACPI_DBG_FAN 0x0010
188 #define TPACPI_DBG_BRGHT 0x0020
189
190 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
191 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
192 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
193
194
195 /****************************************************************************
196 * Driver-wide structs and misc. variables
197 */
198
199 struct ibm_struct;
200
201 struct tp_acpi_drv_struct {
202 const struct acpi_device_id *hid;
203 struct acpi_driver *driver;
204
205 void (*notify) (struct ibm_struct *, u32);
206 acpi_handle *handle;
207 u32 type;
208 struct acpi_device *device;
209 };
210
211 struct ibm_struct {
212 char *name;
213
214 int (*read) (char *);
215 int (*write) (char *);
216 void (*exit) (void);
217 void (*resume) (void);
218 void (*suspend) (pm_message_t state);
219 void (*shutdown) (void);
220
221 struct list_head all_drivers;
222
223 struct tp_acpi_drv_struct *acpi;
224
225 struct {
226 u8 acpi_driver_registered:1;
227 u8 acpi_notify_installed:1;
228 u8 proc_created:1;
229 u8 init_called:1;
230 u8 experimental:1;
231 } flags;
232 };
233
234 struct ibm_init_struct {
235 char param[32];
236
237 int (*init) (struct ibm_init_struct *);
238 struct ibm_struct *data;
239 };
240
241 static struct {
242 u32 bluetooth:1;
243 u32 hotkey:1;
244 u32 hotkey_mask:1;
245 u32 hotkey_wlsw:1;
246 u32 hotkey_tablet:1;
247 u32 light:1;
248 u32 light_status:1;
249 u32 bright_16levels:1;
250 u32 bright_acpimode:1;
251 u32 wan:1;
252 u32 uwb:1;
253 u32 fan_ctrl_status_undef:1;
254 u32 second_fan:1;
255 u32 beep_needs_two_args:1;
256 u32 input_device_registered:1;
257 u32 platform_drv_registered:1;
258 u32 platform_drv_attrs_registered:1;
259 u32 sensors_pdrv_registered:1;
260 u32 sensors_pdrv_attrs_registered:1;
261 u32 sensors_pdev_attrs_registered:1;
262 u32 hotkey_poll_active:1;
263 } tp_features;
264
265 static struct {
266 u16 hotkey_mask_ff:1;
267 } tp_warned;
268
269 struct thinkpad_id_data {
270 unsigned int vendor; /* ThinkPad vendor:
271 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
272
273 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
274 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
275
276 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */
277 u16 ec_model;
278 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */
279 u16 ec_release;
280
281 char *model_str; /* ThinkPad T43 */
282 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
283 };
284 static struct thinkpad_id_data thinkpad_id;
285
286 static enum {
287 TPACPI_LIFE_INIT = 0,
288 TPACPI_LIFE_RUNNING,
289 TPACPI_LIFE_EXITING,
290 } tpacpi_lifecycle;
291
292 static int experimental;
293 static u32 dbg_level;
294
295 static struct workqueue_struct *tpacpi_wq;
296
297 enum led_status_t {
298 TPACPI_LED_OFF = 0,
299 TPACPI_LED_ON,
300 TPACPI_LED_BLINK,
301 };
302
303 /* Special LED class that can defer work */
304 struct tpacpi_led_classdev {
305 struct led_classdev led_classdev;
306 struct work_struct work;
307 enum led_status_t new_state;
308 unsigned int led;
309 };
310
311 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
312 static int dbg_wlswemul;
313 static int tpacpi_wlsw_emulstate;
314 static int dbg_bluetoothemul;
315 static int tpacpi_bluetooth_emulstate;
316 static int dbg_wwanemul;
317 static int tpacpi_wwan_emulstate;
318 static int dbg_uwbemul;
319 static int tpacpi_uwb_emulstate;
320 #endif
321
322
323 /*************************************************************************
324 * Debugging helpers
325 */
326
327 #define dbg_printk(a_dbg_level, format, arg...) \
328 do { if (dbg_level & (a_dbg_level)) \
329 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
330 } while (0)
331
332 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
333 #define vdbg_printk dbg_printk
334 static const char *str_supported(int is_supported);
335 #else
336 #define vdbg_printk(a_dbg_level, format, arg...) \
337 do { } while (0)
338 #endif
339
340 static void tpacpi_log_usertask(const char * const what)
341 {
342 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
343 what, task_tgid_vnr(current));
344 }
345
346 #define tpacpi_disclose_usertask(what, format, arg...) \
347 do { \
348 if (unlikely( \
349 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
350 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
351 printk(TPACPI_DEBUG "%s: PID %d: " format, \
352 what, task_tgid_vnr(current), ## arg); \
353 } \
354 } while (0)
355
356 /*
357 * Quirk handling helpers
358 *
359 * ThinkPad IDs and versions seen in the field so far
360 * are two-characters from the set [0-9A-Z], i.e. base 36.
361 *
362 * We use values well outside that range as specials.
363 */
364
365 #define TPACPI_MATCH_ANY 0xffffU
366 #define TPACPI_MATCH_UNKNOWN 0U
367
368 /* TPID('1', 'Y') == 0x5931 */
369 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
370
371 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \
372 { .vendor = PCI_VENDOR_ID_IBM, \
373 .bios = TPID(__id1, __id2), \
374 .ec = TPACPI_MATCH_ANY, \
375 .quirks = (__quirk) }
376
377 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \
378 { .vendor = PCI_VENDOR_ID_LENOVO, \
379 .bios = TPID(__id1, __id2), \
380 .ec = TPACPI_MATCH_ANY, \
381 .quirks = (__quirk) }
382
383 struct tpacpi_quirk {
384 unsigned int vendor;
385 u16 bios;
386 u16 ec;
387 unsigned long quirks;
388 };
389
390 /**
391 * tpacpi_check_quirks() - search BIOS/EC version on a list
392 * @qlist: array of &struct tpacpi_quirk
393 * @qlist_size: number of elements in @qlist
394 *
395 * Iterates over a quirks list until one is found that matches the
396 * ThinkPad's vendor, BIOS and EC model.
397 *
398 * Returns 0 if nothing matches, otherwise returns the quirks field of
399 * the matching &struct tpacpi_quirk entry.
400 *
401 * The match criteria is: vendor, ec and bios much match.
402 */
403 static unsigned long __init tpacpi_check_quirks(
404 const struct tpacpi_quirk *qlist,
405 unsigned int qlist_size)
406 {
407 while (qlist_size) {
408 if ((qlist->vendor == thinkpad_id.vendor ||
409 qlist->vendor == TPACPI_MATCH_ANY) &&
410 (qlist->bios == thinkpad_id.bios_model ||
411 qlist->bios == TPACPI_MATCH_ANY) &&
412 (qlist->ec == thinkpad_id.ec_model ||
413 qlist->ec == TPACPI_MATCH_ANY))
414 return qlist->quirks;
415
416 qlist_size--;
417 qlist++;
418 }
419 return 0;
420 }
421
422
423 /****************************************************************************
424 ****************************************************************************
425 *
426 * ACPI Helpers and device model
427 *
428 ****************************************************************************
429 ****************************************************************************/
430
431 /*************************************************************************
432 * ACPI basic handles
433 */
434
435 static acpi_handle root_handle;
436
437 #define TPACPI_HANDLE(object, parent, paths...) \
438 static acpi_handle object##_handle; \
439 static acpi_handle *object##_parent = &parent##_handle; \
440 static char *object##_path; \
441 static char *object##_paths[] = { paths }
442
443 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
444 "\\_SB.PCI.ISA.EC", /* 570 */
445 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
446 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
447 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
448 "\\_SB.PCI0.ICH3.EC0", /* R31 */
449 "\\_SB.PCI0.LPC.EC", /* all others */
450 );
451
452 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
453 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
454
455 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
456 /* T4x, X31, X40 */
457 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
458 "\\CMS", /* R40, R40e */
459 ); /* all others */
460
461 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
462 "^HKEY", /* R30, R31 */
463 "HKEY", /* all others */
464 ); /* 570 */
465
466 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
467 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
468 "\\_SB.PCI0.VID0", /* 770e */
469 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
470 "\\_SB.PCI0.AGP.VID", /* all others */
471 ); /* R30, R31 */
472
473
474 /*************************************************************************
475 * ACPI helpers
476 */
477
478 static int acpi_evalf(acpi_handle handle,
479 void *res, char *method, char *fmt, ...)
480 {
481 char *fmt0 = fmt;
482 struct acpi_object_list params;
483 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
484 struct acpi_buffer result, *resultp;
485 union acpi_object out_obj;
486 acpi_status status;
487 va_list ap;
488 char res_type;
489 int success;
490 int quiet;
491
492 if (!*fmt) {
493 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
494 return 0;
495 }
496
497 if (*fmt == 'q') {
498 quiet = 1;
499 fmt++;
500 } else
501 quiet = 0;
502
503 res_type = *(fmt++);
504
505 params.count = 0;
506 params.pointer = &in_objs[0];
507
508 va_start(ap, fmt);
509 while (*fmt) {
510 char c = *(fmt++);
511 switch (c) {
512 case 'd': /* int */
513 in_objs[params.count].integer.value = va_arg(ap, int);
514 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
515 break;
516 /* add more types as needed */
517 default:
518 printk(TPACPI_ERR "acpi_evalf() called "
519 "with invalid format character '%c'\n", c);
520 return 0;
521 }
522 }
523 va_end(ap);
524
525 if (res_type != 'v') {
526 result.length = sizeof(out_obj);
527 result.pointer = &out_obj;
528 resultp = &result;
529 } else
530 resultp = NULL;
531
532 status = acpi_evaluate_object(handle, method, &params, resultp);
533
534 switch (res_type) {
535 case 'd': /* int */
536 if (res)
537 *(int *)res = out_obj.integer.value;
538 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
539 break;
540 case 'v': /* void */
541 success = status == AE_OK;
542 break;
543 /* add more types as needed */
544 default:
545 printk(TPACPI_ERR "acpi_evalf() called "
546 "with invalid format character '%c'\n", res_type);
547 return 0;
548 }
549
550 if (!success && !quiet)
551 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
552 method, fmt0, status);
553
554 return success;
555 }
556
557 static int acpi_ec_read(int i, u8 *p)
558 {
559 int v;
560
561 if (ecrd_handle) {
562 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
563 return 0;
564 *p = v;
565 } else {
566 if (ec_read(i, p) < 0)
567 return 0;
568 }
569
570 return 1;
571 }
572
573 static int acpi_ec_write(int i, u8 v)
574 {
575 if (ecwr_handle) {
576 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
577 return 0;
578 } else {
579 if (ec_write(i, v) < 0)
580 return 0;
581 }
582
583 return 1;
584 }
585
586 static int issue_thinkpad_cmos_command(int cmos_cmd)
587 {
588 if (!cmos_handle)
589 return -ENXIO;
590
591 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
592 return -EIO;
593
594 return 0;
595 }
596
597 /*************************************************************************
598 * ACPI device model
599 */
600
601 #define TPACPI_ACPIHANDLE_INIT(object) \
602 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
603 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
604
605 static void drv_acpi_handle_init(char *name,
606 acpi_handle *handle, acpi_handle parent,
607 char **paths, int num_paths, char **path)
608 {
609 int i;
610 acpi_status status;
611
612 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
613 name);
614
615 for (i = 0; i < num_paths; i++) {
616 status = acpi_get_handle(parent, paths[i], handle);
617 if (ACPI_SUCCESS(status)) {
618 *path = paths[i];
619 dbg_printk(TPACPI_DBG_INIT,
620 "Found ACPI handle %s for %s\n",
621 *path, name);
622 return;
623 }
624 }
625
626 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
627 name);
628 *handle = NULL;
629 }
630
631 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
632 {
633 struct ibm_struct *ibm = data;
634
635 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
636 return;
637
638 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
639 return;
640
641 ibm->acpi->notify(ibm, event);
642 }
643
644 static int __init setup_acpi_notify(struct ibm_struct *ibm)
645 {
646 acpi_status status;
647 int rc;
648
649 BUG_ON(!ibm->acpi);
650
651 if (!*ibm->acpi->handle)
652 return 0;
653
654 vdbg_printk(TPACPI_DBG_INIT,
655 "setting up ACPI notify for %s\n", ibm->name);
656
657 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
658 if (rc < 0) {
659 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
660 ibm->name, rc);
661 return -ENODEV;
662 }
663
664 ibm->acpi->device->driver_data = ibm;
665 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
666 TPACPI_ACPI_EVENT_PREFIX,
667 ibm->name);
668
669 status = acpi_install_notify_handler(*ibm->acpi->handle,
670 ibm->acpi->type, dispatch_acpi_notify, ibm);
671 if (ACPI_FAILURE(status)) {
672 if (status == AE_ALREADY_EXISTS) {
673 printk(TPACPI_NOTICE
674 "another device driver is already "
675 "handling %s events\n", ibm->name);
676 } else {
677 printk(TPACPI_ERR
678 "acpi_install_notify_handler(%s) failed: %d\n",
679 ibm->name, status);
680 }
681 return -ENODEV;
682 }
683 ibm->flags.acpi_notify_installed = 1;
684 return 0;
685 }
686
687 static int __init tpacpi_device_add(struct acpi_device *device)
688 {
689 return 0;
690 }
691
692 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
693 {
694 int rc;
695
696 dbg_printk(TPACPI_DBG_INIT,
697 "registering %s as an ACPI driver\n", ibm->name);
698
699 BUG_ON(!ibm->acpi);
700
701 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
702 if (!ibm->acpi->driver) {
703 printk(TPACPI_ERR
704 "failed to allocate memory for ibm->acpi->driver\n");
705 return -ENOMEM;
706 }
707
708 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
709 ibm->acpi->driver->ids = ibm->acpi->hid;
710
711 ibm->acpi->driver->ops.add = &tpacpi_device_add;
712
713 rc = acpi_bus_register_driver(ibm->acpi->driver);
714 if (rc < 0) {
715 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
716 ibm->name, rc);
717 kfree(ibm->acpi->driver);
718 ibm->acpi->driver = NULL;
719 } else if (!rc)
720 ibm->flags.acpi_driver_registered = 1;
721
722 return rc;
723 }
724
725
726 /****************************************************************************
727 ****************************************************************************
728 *
729 * Procfs Helpers
730 *
731 ****************************************************************************
732 ****************************************************************************/
733
734 static int dispatch_procfs_read(char *page, char **start, off_t off,
735 int count, int *eof, void *data)
736 {
737 struct ibm_struct *ibm = data;
738 int len;
739
740 if (!ibm || !ibm->read)
741 return -EINVAL;
742
743 len = ibm->read(page);
744 if (len < 0)
745 return len;
746
747 if (len <= off + count)
748 *eof = 1;
749 *start = page + off;
750 len -= off;
751 if (len > count)
752 len = count;
753 if (len < 0)
754 len = 0;
755
756 return len;
757 }
758
759 static int dispatch_procfs_write(struct file *file,
760 const char __user *userbuf,
761 unsigned long count, void *data)
762 {
763 struct ibm_struct *ibm = data;
764 char *kernbuf;
765 int ret;
766
767 if (!ibm || !ibm->write)
768 return -EINVAL;
769 if (count > PAGE_SIZE - 2)
770 return -EINVAL;
771
772 kernbuf = kmalloc(count + 2, GFP_KERNEL);
773 if (!kernbuf)
774 return -ENOMEM;
775
776 if (copy_from_user(kernbuf, userbuf, count)) {
777 kfree(kernbuf);
778 return -EFAULT;
779 }
780
781 kernbuf[count] = 0;
782 strcat(kernbuf, ",");
783 ret = ibm->write(kernbuf);
784 if (ret == 0)
785 ret = count;
786
787 kfree(kernbuf);
788
789 return ret;
790 }
791
792 static char *next_cmd(char **cmds)
793 {
794 char *start = *cmds;
795 char *end;
796
797 while ((end = strchr(start, ',')) && end == start)
798 start = end + 1;
799
800 if (!end)
801 return NULL;
802
803 *end = 0;
804 *cmds = end + 1;
805 return start;
806 }
807
808
809 /****************************************************************************
810 ****************************************************************************
811 *
812 * Device model: input, hwmon and platform
813 *
814 ****************************************************************************
815 ****************************************************************************/
816
817 static struct platform_device *tpacpi_pdev;
818 static struct platform_device *tpacpi_sensors_pdev;
819 static struct device *tpacpi_hwmon;
820 static struct input_dev *tpacpi_inputdev;
821 static struct mutex tpacpi_inputdev_send_mutex;
822 static LIST_HEAD(tpacpi_all_drivers);
823
824 static int tpacpi_suspend_handler(struct platform_device *pdev,
825 pm_message_t state)
826 {
827 struct ibm_struct *ibm, *itmp;
828
829 list_for_each_entry_safe(ibm, itmp,
830 &tpacpi_all_drivers,
831 all_drivers) {
832 if (ibm->suspend)
833 (ibm->suspend)(state);
834 }
835
836 return 0;
837 }
838
839 static int tpacpi_resume_handler(struct platform_device *pdev)
840 {
841 struct ibm_struct *ibm, *itmp;
842
843 list_for_each_entry_safe(ibm, itmp,
844 &tpacpi_all_drivers,
845 all_drivers) {
846 if (ibm->resume)
847 (ibm->resume)();
848 }
849
850 return 0;
851 }
852
853 static void tpacpi_shutdown_handler(struct platform_device *pdev)
854 {
855 struct ibm_struct *ibm, *itmp;
856
857 list_for_each_entry_safe(ibm, itmp,
858 &tpacpi_all_drivers,
859 all_drivers) {
860 if (ibm->shutdown)
861 (ibm->shutdown)();
862 }
863 }
864
865 static struct platform_driver tpacpi_pdriver = {
866 .driver = {
867 .name = TPACPI_DRVR_NAME,
868 .owner = THIS_MODULE,
869 },
870 .suspend = tpacpi_suspend_handler,
871 .resume = tpacpi_resume_handler,
872 .shutdown = tpacpi_shutdown_handler,
873 };
874
875 static struct platform_driver tpacpi_hwmon_pdriver = {
876 .driver = {
877 .name = TPACPI_HWMON_DRVR_NAME,
878 .owner = THIS_MODULE,
879 },
880 };
881
882 /*************************************************************************
883 * sysfs support helpers
884 */
885
886 struct attribute_set {
887 unsigned int members, max_members;
888 struct attribute_group group;
889 };
890
891 struct attribute_set_obj {
892 struct attribute_set s;
893 struct attribute *a;
894 } __attribute__((packed));
895
896 static struct attribute_set *create_attr_set(unsigned int max_members,
897 const char *name)
898 {
899 struct attribute_set_obj *sobj;
900
901 if (max_members == 0)
902 return NULL;
903
904 /* Allocates space for implicit NULL at the end too */
905 sobj = kzalloc(sizeof(struct attribute_set_obj) +
906 max_members * sizeof(struct attribute *),
907 GFP_KERNEL);
908 if (!sobj)
909 return NULL;
910 sobj->s.max_members = max_members;
911 sobj->s.group.attrs = &sobj->a;
912 sobj->s.group.name = name;
913
914 return &sobj->s;
915 }
916
917 #define destroy_attr_set(_set) \
918 kfree(_set);
919
920 /* not multi-threaded safe, use it in a single thread per set */
921 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
922 {
923 if (!s || !attr)
924 return -EINVAL;
925
926 if (s->members >= s->max_members)
927 return -ENOMEM;
928
929 s->group.attrs[s->members] = attr;
930 s->members++;
931
932 return 0;
933 }
934
935 static int add_many_to_attr_set(struct attribute_set *s,
936 struct attribute **attr,
937 unsigned int count)
938 {
939 int i, res;
940
941 for (i = 0; i < count; i++) {
942 res = add_to_attr_set(s, attr[i]);
943 if (res)
944 return res;
945 }
946
947 return 0;
948 }
949
950 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
951 {
952 sysfs_remove_group(kobj, &s->group);
953 destroy_attr_set(s);
954 }
955
956 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
957 sysfs_create_group(_kobj, &_attr_set->group)
958
959 static int parse_strtoul(const char *buf,
960 unsigned long max, unsigned long *value)
961 {
962 char *endp;
963
964 while (*buf && isspace(*buf))
965 buf++;
966 *value = simple_strtoul(buf, &endp, 0);
967 while (*endp && isspace(*endp))
968 endp++;
969 if (*endp || *value > max)
970 return -EINVAL;
971
972 return 0;
973 }
974
975 static void tpacpi_disable_brightness_delay(void)
976 {
977 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
978 printk(TPACPI_NOTICE
979 "ACPI backlight control delay disabled\n");
980 }
981
982 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
983 {
984 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
985 union acpi_object *obj;
986 int rc;
987
988 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
989 obj = (union acpi_object *)buffer.pointer;
990 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
991 printk(TPACPI_ERR "Unknown _BCL data, "
992 "please report this to %s\n", TPACPI_MAIL);
993 rc = 0;
994 } else {
995 rc = obj->package.count;
996 }
997 } else {
998 return 0;
999 }
1000
1001 kfree(buffer.pointer);
1002 return rc;
1003 }
1004
1005 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1006 u32 lvl, void *context, void **rv)
1007 {
1008 char name[ACPI_PATH_SEGMENT_LENGTH];
1009 struct acpi_buffer buffer = { sizeof(name), &name };
1010
1011 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1012 !strncmp("_BCL", name, sizeof(name) - 1)) {
1013 BUG_ON(!rv || !*rv);
1014 **(int **)rv = tpacpi_query_bcl_levels(handle);
1015 return AE_CTRL_TERMINATE;
1016 } else {
1017 return AE_OK;
1018 }
1019 }
1020
1021 /*
1022 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1023 */
1024 static int __init tpacpi_check_std_acpi_brightness_support(void)
1025 {
1026 int status;
1027 int bcl_levels = 0;
1028 void *bcl_ptr = &bcl_levels;
1029
1030 if (!vid_handle) {
1031 TPACPI_ACPIHANDLE_INIT(vid);
1032 }
1033 if (!vid_handle)
1034 return 0;
1035
1036 /*
1037 * Search for a _BCL method, and execute it. This is safe on all
1038 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1039 * BIOS in ACPI backlight control mode. We do NOT have to care
1040 * about calling the _BCL method in an enabled video device, any
1041 * will do for our purposes.
1042 */
1043
1044 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1045 tpacpi_acpi_walk_find_bcl, NULL,
1046 &bcl_ptr);
1047
1048 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1049 tp_features.bright_acpimode = 1;
1050 return (bcl_levels - 2);
1051 }
1052
1053 return 0;
1054 }
1055
1056 static void printk_deprecated_attribute(const char * const what,
1057 const char * const details)
1058 {
1059 tpacpi_log_usertask("deprecated sysfs attribute");
1060 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1061 "will be removed. %s\n",
1062 what, details);
1063 }
1064
1065 /*************************************************************************
1066 * rfkill and radio control support helpers
1067 */
1068
1069 /*
1070 * ThinkPad-ACPI firmware handling model:
1071 *
1072 * WLSW (master wireless switch) is event-driven, and is common to all
1073 * firmware-controlled radios. It cannot be controlled, just monitored,
1074 * as expected. It overrides all radio state in firmware
1075 *
1076 * The kernel, a masked-off hotkey, and WLSW can change the radio state
1077 * (TODO: verify how WLSW interacts with the returned radio state).
1078 *
1079 * The only time there are shadow radio state changes, is when
1080 * masked-off hotkeys are used.
1081 */
1082
1083 /*
1084 * Internal driver API for radio state:
1085 *
1086 * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1087 * bool: true means radio blocked (off)
1088 */
1089 enum tpacpi_rfkill_state {
1090 TPACPI_RFK_RADIO_OFF = 0,
1091 TPACPI_RFK_RADIO_ON
1092 };
1093
1094 /* rfkill switches */
1095 enum tpacpi_rfk_id {
1096 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1097 TPACPI_RFK_WWAN_SW_ID,
1098 TPACPI_RFK_UWB_SW_ID,
1099 TPACPI_RFK_SW_MAX
1100 };
1101
1102 static const char *tpacpi_rfkill_names[] = {
1103 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1104 [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1105 [TPACPI_RFK_UWB_SW_ID] = "uwb",
1106 [TPACPI_RFK_SW_MAX] = NULL
1107 };
1108
1109 /* ThinkPad-ACPI rfkill subdriver */
1110 struct tpacpi_rfk {
1111 struct rfkill *rfkill;
1112 enum tpacpi_rfk_id id;
1113 const struct tpacpi_rfk_ops *ops;
1114 };
1115
1116 struct tpacpi_rfk_ops {
1117 /* firmware interface */
1118 int (*get_status)(void);
1119 int (*set_status)(const enum tpacpi_rfkill_state);
1120 };
1121
1122 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1123
1124 /* Query FW and update rfkill sw state for a given rfkill switch */
1125 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1126 {
1127 int status;
1128
1129 if (!tp_rfk)
1130 return -ENODEV;
1131
1132 status = (tp_rfk->ops->get_status)();
1133 if (status < 0)
1134 return status;
1135
1136 rfkill_set_sw_state(tp_rfk->rfkill,
1137 (status == TPACPI_RFK_RADIO_OFF));
1138
1139 return status;
1140 }
1141
1142 /* Query FW and update rfkill sw state for all rfkill switches */
1143 static void tpacpi_rfk_update_swstate_all(void)
1144 {
1145 unsigned int i;
1146
1147 for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1148 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1149 }
1150
1151 /*
1152 * Sync the HW-blocking state of all rfkill switches,
1153 * do notice it causes the rfkill core to schedule uevents
1154 */
1155 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1156 {
1157 unsigned int i;
1158 struct tpacpi_rfk *tp_rfk;
1159
1160 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1161 tp_rfk = tpacpi_rfkill_switches[i];
1162 if (tp_rfk) {
1163 if (rfkill_set_hw_state(tp_rfk->rfkill,
1164 blocked)) {
1165 /* ignore -- we track sw block */
1166 }
1167 }
1168 }
1169 }
1170
1171 /* Call to get the WLSW state from the firmware */
1172 static int hotkey_get_wlsw(void);
1173
1174 /* Call to query WLSW state and update all rfkill switches */
1175 static bool tpacpi_rfk_check_hwblock_state(void)
1176 {
1177 int res = hotkey_get_wlsw();
1178 int hw_blocked;
1179
1180 /* When unknown or unsupported, we have to assume it is unblocked */
1181 if (res < 0)
1182 return false;
1183
1184 hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1185 tpacpi_rfk_update_hwblock_state(hw_blocked);
1186
1187 return hw_blocked;
1188 }
1189
1190 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1191 {
1192 struct tpacpi_rfk *tp_rfk = data;
1193 int res;
1194
1195 dbg_printk(TPACPI_DBG_RFKILL,
1196 "request to change radio state to %s\n",
1197 blocked ? "blocked" : "unblocked");
1198
1199 /* try to set radio state */
1200 res = (tp_rfk->ops->set_status)(blocked ?
1201 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1202
1203 /* and update the rfkill core with whatever the FW really did */
1204 tpacpi_rfk_update_swstate(tp_rfk);
1205
1206 return (res < 0) ? res : 0;
1207 }
1208
1209 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1210 .set_block = tpacpi_rfk_hook_set_block,
1211 };
1212
1213 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1214 const struct tpacpi_rfk_ops *tp_rfkops,
1215 const enum rfkill_type rfktype,
1216 const char *name,
1217 const bool set_default)
1218 {
1219 struct tpacpi_rfk *atp_rfk;
1220 int res;
1221 bool sw_state = false;
1222 int sw_status;
1223
1224 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1225
1226 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1227 if (atp_rfk)
1228 atp_rfk->rfkill = rfkill_alloc(name,
1229 &tpacpi_pdev->dev,
1230 rfktype,
1231 &tpacpi_rfk_rfkill_ops,
1232 atp_rfk);
1233 if (!atp_rfk || !atp_rfk->rfkill) {
1234 printk(TPACPI_ERR
1235 "failed to allocate memory for rfkill class\n");
1236 kfree(atp_rfk);
1237 return -ENOMEM;
1238 }
1239
1240 atp_rfk->id = id;
1241 atp_rfk->ops = tp_rfkops;
1242
1243 sw_status = (tp_rfkops->get_status)();
1244 if (sw_status < 0) {
1245 printk(TPACPI_ERR
1246 "failed to read initial state for %s, error %d\n",
1247 name, sw_status);
1248 } else {
1249 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1250 if (set_default) {
1251 /* try to keep the initial state, since we ask the
1252 * firmware to preserve it across S5 in NVRAM */
1253 rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1254 }
1255 }
1256 rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1257
1258 res = rfkill_register(atp_rfk->rfkill);
1259 if (res < 0) {
1260 printk(TPACPI_ERR
1261 "failed to register %s rfkill switch: %d\n",
1262 name, res);
1263 rfkill_destroy(atp_rfk->rfkill);
1264 kfree(atp_rfk);
1265 return res;
1266 }
1267
1268 tpacpi_rfkill_switches[id] = atp_rfk;
1269 return 0;
1270 }
1271
1272 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1273 {
1274 struct tpacpi_rfk *tp_rfk;
1275
1276 BUG_ON(id >= TPACPI_RFK_SW_MAX);
1277
1278 tp_rfk = tpacpi_rfkill_switches[id];
1279 if (tp_rfk) {
1280 rfkill_unregister(tp_rfk->rfkill);
1281 tpacpi_rfkill_switches[id] = NULL;
1282 kfree(tp_rfk);
1283 }
1284 }
1285
1286 static void printk_deprecated_rfkill_attribute(const char * const what)
1287 {
1288 printk_deprecated_attribute(what,
1289 "Please switch to generic rfkill before year 2010");
1290 }
1291
1292 /* sysfs <radio> enable ------------------------------------------------ */
1293 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1294 struct device_attribute *attr,
1295 char *buf)
1296 {
1297 int status;
1298
1299 printk_deprecated_rfkill_attribute(attr->attr.name);
1300
1301 /* This is in the ABI... */
1302 if (tpacpi_rfk_check_hwblock_state()) {
1303 status = TPACPI_RFK_RADIO_OFF;
1304 } else {
1305 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1306 if (status < 0)
1307 return status;
1308 }
1309
1310 return snprintf(buf, PAGE_SIZE, "%d\n",
1311 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1312 }
1313
1314 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1315 struct device_attribute *attr,
1316 const char *buf, size_t count)
1317 {
1318 unsigned long t;
1319 int res;
1320
1321 printk_deprecated_rfkill_attribute(attr->attr.name);
1322
1323 if (parse_strtoul(buf, 1, &t))
1324 return -EINVAL;
1325
1326 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1327
1328 /* This is in the ABI... */
1329 if (tpacpi_rfk_check_hwblock_state() && !!t)
1330 return -EPERM;
1331
1332 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1333 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1334 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1335
1336 return (res < 0) ? res : count;
1337 }
1338
1339 /* procfs -------------------------------------------------------------- */
1340 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1341 {
1342 int len = 0;
1343
1344 if (id >= TPACPI_RFK_SW_MAX)
1345 len += sprintf(p + len, "status:\t\tnot supported\n");
1346 else {
1347 int status;
1348
1349 /* This is in the ABI... */
1350 if (tpacpi_rfk_check_hwblock_state()) {
1351 status = TPACPI_RFK_RADIO_OFF;
1352 } else {
1353 status = tpacpi_rfk_update_swstate(
1354 tpacpi_rfkill_switches[id]);
1355 if (status < 0)
1356 return status;
1357 }
1358
1359 len += sprintf(p + len, "status:\t\t%s\n",
1360 (status == TPACPI_RFK_RADIO_ON) ?
1361 "enabled" : "disabled");
1362 len += sprintf(p + len, "commands:\tenable, disable\n");
1363 }
1364
1365 return len;
1366 }
1367
1368 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1369 {
1370 char *cmd;
1371 int status = -1;
1372 int res = 0;
1373
1374 if (id >= TPACPI_RFK_SW_MAX)
1375 return -ENODEV;
1376
1377 while ((cmd = next_cmd(&buf))) {
1378 if (strlencmp(cmd, "enable") == 0)
1379 status = TPACPI_RFK_RADIO_ON;
1380 else if (strlencmp(cmd, "disable") == 0)
1381 status = TPACPI_RFK_RADIO_OFF;
1382 else
1383 return -EINVAL;
1384 }
1385
1386 if (status != -1) {
1387 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1388 (status == TPACPI_RFK_RADIO_ON) ?
1389 "enable" : "disable",
1390 tpacpi_rfkill_names[id]);
1391 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1392 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1393 }
1394
1395 return res;
1396 }
1397
1398 /*************************************************************************
1399 * thinkpad-acpi driver attributes
1400 */
1401
1402 /* interface_version --------------------------------------------------- */
1403 static ssize_t tpacpi_driver_interface_version_show(
1404 struct device_driver *drv,
1405 char *buf)
1406 {
1407 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1408 }
1409
1410 static DRIVER_ATTR(interface_version, S_IRUGO,
1411 tpacpi_driver_interface_version_show, NULL);
1412
1413 /* debug_level --------------------------------------------------------- */
1414 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1415 char *buf)
1416 {
1417 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1418 }
1419
1420 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1421 const char *buf, size_t count)
1422 {
1423 unsigned long t;
1424
1425 if (parse_strtoul(buf, 0xffff, &t))
1426 return -EINVAL;
1427
1428 dbg_level = t;
1429
1430 return count;
1431 }
1432
1433 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1434 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1435
1436 /* version ------------------------------------------------------------- */
1437 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1438 char *buf)
1439 {
1440 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1441 TPACPI_DESC, TPACPI_VERSION);
1442 }
1443
1444 static DRIVER_ATTR(version, S_IRUGO,
1445 tpacpi_driver_version_show, NULL);
1446
1447 /* --------------------------------------------------------------------- */
1448
1449 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1450
1451 /* wlsw_emulstate ------------------------------------------------------ */
1452 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1453 char *buf)
1454 {
1455 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1456 }
1457
1458 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1459 const char *buf, size_t count)
1460 {
1461 unsigned long t;
1462
1463 if (parse_strtoul(buf, 1, &t))
1464 return -EINVAL;
1465
1466 if (tpacpi_wlsw_emulstate != !!t) {
1467 tpacpi_wlsw_emulstate = !!t;
1468 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */
1469 }
1470
1471 return count;
1472 }
1473
1474 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1475 tpacpi_driver_wlsw_emulstate_show,
1476 tpacpi_driver_wlsw_emulstate_store);
1477
1478 /* bluetooth_emulstate ------------------------------------------------- */
1479 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1480 struct device_driver *drv,
1481 char *buf)
1482 {
1483 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1484 }
1485
1486 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1487 struct device_driver *drv,
1488 const char *buf, size_t count)
1489 {
1490 unsigned long t;
1491
1492 if (parse_strtoul(buf, 1, &t))
1493 return -EINVAL;
1494
1495 tpacpi_bluetooth_emulstate = !!t;
1496
1497 return count;
1498 }
1499
1500 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1501 tpacpi_driver_bluetooth_emulstate_show,
1502 tpacpi_driver_bluetooth_emulstate_store);
1503
1504 /* wwan_emulstate ------------------------------------------------- */
1505 static ssize_t tpacpi_driver_wwan_emulstate_show(
1506 struct device_driver *drv,
1507 char *buf)
1508 {
1509 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1510 }
1511
1512 static ssize_t tpacpi_driver_wwan_emulstate_store(
1513 struct device_driver *drv,
1514 const char *buf, size_t count)
1515 {
1516 unsigned long t;
1517
1518 if (parse_strtoul(buf, 1, &t))
1519 return -EINVAL;
1520
1521 tpacpi_wwan_emulstate = !!t;
1522
1523 return count;
1524 }
1525
1526 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1527 tpacpi_driver_wwan_emulstate_show,
1528 tpacpi_driver_wwan_emulstate_store);
1529
1530 /* uwb_emulstate ------------------------------------------------- */
1531 static ssize_t tpacpi_driver_uwb_emulstate_show(
1532 struct device_driver *drv,
1533 char *buf)
1534 {
1535 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1536 }
1537
1538 static ssize_t tpacpi_driver_uwb_emulstate_store(
1539 struct device_driver *drv,
1540 const char *buf, size_t count)
1541 {
1542 unsigned long t;
1543
1544 if (parse_strtoul(buf, 1, &t))
1545 return -EINVAL;
1546
1547 tpacpi_uwb_emulstate = !!t;
1548
1549 return count;
1550 }
1551
1552 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1553 tpacpi_driver_uwb_emulstate_show,
1554 tpacpi_driver_uwb_emulstate_store);
1555 #endif
1556
1557 /* --------------------------------------------------------------------- */
1558
1559 static struct driver_attribute *tpacpi_driver_attributes[] = {
1560 &driver_attr_debug_level, &driver_attr_version,
1561 &driver_attr_interface_version,
1562 };
1563
1564 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1565 {
1566 int i, res;
1567
1568 i = 0;
1569 res = 0;
1570 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1571 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1572 i++;
1573 }
1574
1575 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1576 if (!res && dbg_wlswemul)
1577 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1578 if (!res && dbg_bluetoothemul)
1579 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1580 if (!res && dbg_wwanemul)
1581 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1582 if (!res && dbg_uwbemul)
1583 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1584 #endif
1585
1586 return res;
1587 }
1588
1589 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1590 {
1591 int i;
1592
1593 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1594 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1595
1596 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1597 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1598 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1599 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1600 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1601 #endif
1602 }
1603
1604 /*************************************************************************
1605 * Firmware Data
1606 */
1607
1608 /*
1609 * Table of recommended minimum BIOS versions
1610 *
1611 * Reasons for listing:
1612 * 1. Stable BIOS, listed because the unknown ammount of
1613 * bugs and bad ACPI behaviour on older versions
1614 *
1615 * 2. BIOS or EC fw with known bugs that trigger on Linux
1616 *
1617 * 3. BIOS with known reduced functionality in older versions
1618 *
1619 * We recommend the latest BIOS and EC version.
1620 * We only support the latest BIOS and EC fw version as a rule.
1621 *
1622 * Sources: IBM ThinkPad Public Web Documents (update changelogs),
1623 * Information from users in ThinkWiki
1624 *
1625 * WARNING: we use this table also to detect that the machine is
1626 * a ThinkPad in some cases, so don't remove entries lightly.
1627 */
1628
1629 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \
1630 { .vendor = (__v), \
1631 .bios = TPID(__id1, __id2), \
1632 .ec = TPACPI_MATCH_ANY, \
1633 .quirks = TPACPI_MATCH_ANY << 16 \
1634 | (__bv1) << 8 | (__bv2) }
1635
1636 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
1637 __eid1, __eid2, __ev1, __ev2) \
1638 { .vendor = (__v), \
1639 .bios = TPID(__bid1, __bid2), \
1640 .ec = TPID(__eid1, __eid2), \
1641 .quirks = (__ev1) << 24 | (__ev2) << 16 \
1642 | (__bv1) << 8 | (__bv2) }
1643
1644 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1645 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1646
1647 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1648 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
1649 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1650
1651 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
1652 __eid1, __eid2, __ev1, __ev2) \
1653 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
1654 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1655
1656 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1657 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1658
1659 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1660 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
1661 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1662
1663 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
1664 __eid1, __eid2, __ev1, __ev2) \
1665 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
1666 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1667
1668 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1669 /* Numeric models ------------------ */
1670 /* FW MODEL BIOS VERS */
1671 TPV_QI0('I', 'M', '6', '5'), /* 570 */
1672 TPV_QI0('I', 'U', '2', '6'), /* 570E */
1673 TPV_QI0('I', 'B', '5', '4'), /* 600 */
1674 TPV_QI0('I', 'H', '4', '7'), /* 600E */
1675 TPV_QI0('I', 'N', '3', '6'), /* 600E */
1676 TPV_QI0('I', 'T', '5', '5'), /* 600X */
1677 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */
1678 TPV_QI0('I', 'I', '4', '2'), /* 770X */
1679 TPV_QI0('I', 'O', '2', '3'), /* 770Z */
1680
1681 /* A-series ------------------------- */
1682 /* FW MODEL BIOS VERS EC VERS */
1683 TPV_QI0('I', 'W', '5', '9'), /* A20m */
1684 TPV_QI0('I', 'V', '6', '9'), /* A20p */
1685 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */
1686 TPV_QI0('K', 'U', '3', '6'), /* A21e */
1687 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */
1688 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */
1689 TPV_QI0('1', 'B', '1', '7'), /* A22e */
1690 TPV_QI0('1', '3', '2', '0'), /* A22m */
1691 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */
1692 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */
1693 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */
1694
1695 /* G-series ------------------------- */
1696 /* FW MODEL BIOS VERS */
1697 TPV_QI0('1', 'T', 'A', '6'), /* G40 */
1698 TPV_QI0('1', 'X', '5', '7'), /* G41 */
1699
1700 /* R-series, T-series --------------- */
1701 /* FW MODEL BIOS VERS EC VERS */
1702 TPV_QI0('1', 'C', 'F', '0'), /* R30 */
1703 TPV_QI0('1', 'F', 'F', '1'), /* R31 */
1704 TPV_QI0('1', 'M', '9', '7'), /* R32 */
1705 TPV_QI0('1', 'O', '6', '1'), /* R40 */
1706 TPV_QI0('1', 'P', '6', '5'), /* R40 */
1707 TPV_QI0('1', 'S', '7', '0'), /* R40e */
1708 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51,
1709 T40/p, T41/p, T42/p (1) */
1710 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */
1711 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */
1712 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */
1713 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */
1714
1715 TPV_QI0('I', 'Y', '6', '1'), /* T20 */
1716 TPV_QI0('K', 'Z', '3', '4'), /* T21 */
1717 TPV_QI0('1', '6', '3', '2'), /* T22 */
1718 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */
1719 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */
1720 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */
1721
1722 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */
1723 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */
1724 TPV_QL0('7', 'E', 'D', '0'), /* R60e, R60i */
1725
1726 /* BIOS FW BIOS VERS EC FW EC VERS */
1727 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */
1728 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */
1729
1730 /* X-series ------------------------- */
1731 /* FW MODEL BIOS VERS EC VERS */
1732 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */
1733 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */
1734 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */
1735 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */
1736 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */
1737 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */
1738 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */
1739
1740 TPV_QL0('7', 'B', 'D', '7'), /* X60/s */
1741 TPV_QL0('7', 'J', '3', '0'), /* X60t */
1742
1743 /* (0) - older versions lack DMI EC fw string and functionality */
1744 /* (1) - older versions known to lack functionality */
1745 };
1746
1747 #undef TPV_QL1
1748 #undef TPV_QL0
1749 #undef TPV_QI2
1750 #undef TPV_QI1
1751 #undef TPV_QI0
1752 #undef TPV_Q_X
1753 #undef TPV_Q
1754
1755 static void __init tpacpi_check_outdated_fw(void)
1756 {
1757 unsigned long fwvers;
1758 u16 ec_version, bios_version;
1759
1760 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1761 ARRAY_SIZE(tpacpi_bios_version_qtable));
1762
1763 if (!fwvers)
1764 return;
1765
1766 bios_version = fwvers & 0xffffU;
1767 ec_version = (fwvers >> 16) & 0xffffU;
1768
1769 /* note that unknown versions are set to 0x0000 and we use that */
1770 if ((bios_version > thinkpad_id.bios_release) ||
1771 (ec_version > thinkpad_id.ec_release &&
1772 ec_version != TPACPI_MATCH_ANY)) {
1773 /*
1774 * The changelogs would let us track down the exact
1775 * reason, but it is just too much of a pain to track
1776 * it. We only list BIOSes that are either really
1777 * broken, or really stable to begin with, so it is
1778 * best if the user upgrades the firmware anyway.
1779 */
1780 printk(TPACPI_WARN
1781 "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1782 printk(TPACPI_WARN
1783 "WARNING: This firmware may be missing critical bug "
1784 "fixes and/or important features\n");
1785 }
1786 }
1787
1788 static bool __init tpacpi_is_fw_known(void)
1789 {
1790 return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1791 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1792 }
1793
1794 /****************************************************************************
1795 ****************************************************************************
1796 *
1797 * Subdrivers
1798 *
1799 ****************************************************************************
1800 ****************************************************************************/
1801
1802 /*************************************************************************
1803 * thinkpad-acpi init subdriver
1804 */
1805
1806 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1807 {
1808 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1809 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1810
1811 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1812 (thinkpad_id.bios_version_str) ?
1813 thinkpad_id.bios_version_str : "unknown",
1814 (thinkpad_id.ec_version_str) ?
1815 thinkpad_id.ec_version_str : "unknown");
1816
1817 if (thinkpad_id.vendor && thinkpad_id.model_str)
1818 printk(TPACPI_INFO "%s %s, model %s\n",
1819 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1820 "IBM" : ((thinkpad_id.vendor ==
1821 PCI_VENDOR_ID_LENOVO) ?
1822 "Lenovo" : "Unknown vendor"),
1823 thinkpad_id.model_str,
1824 (thinkpad_id.nummodel_str) ?
1825 thinkpad_id.nummodel_str : "unknown");
1826
1827 tpacpi_check_outdated_fw();
1828 return 0;
1829 }
1830
1831 static int thinkpad_acpi_driver_read(char *p)
1832 {
1833 int len = 0;
1834
1835 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1836 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1837
1838 return len;
1839 }
1840
1841 static struct ibm_struct thinkpad_acpi_driver_data = {
1842 .name = "driver",
1843 .read = thinkpad_acpi_driver_read,
1844 };
1845
1846 /*************************************************************************
1847 * Hotkey subdriver
1848 */
1849
1850 enum { /* hot key scan codes (derived from ACPI DSDT) */
1851 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1852 TP_ACPI_HOTKEYSCAN_FNF2,
1853 TP_ACPI_HOTKEYSCAN_FNF3,
1854 TP_ACPI_HOTKEYSCAN_FNF4,
1855 TP_ACPI_HOTKEYSCAN_FNF5,
1856 TP_ACPI_HOTKEYSCAN_FNF6,
1857 TP_ACPI_HOTKEYSCAN_FNF7,
1858 TP_ACPI_HOTKEYSCAN_FNF8,
1859 TP_ACPI_HOTKEYSCAN_FNF9,
1860 TP_ACPI_HOTKEYSCAN_FNF10,
1861 TP_ACPI_HOTKEYSCAN_FNF11,
1862 TP_ACPI_HOTKEYSCAN_FNF12,
1863 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1864 TP_ACPI_HOTKEYSCAN_FNINSERT,
1865 TP_ACPI_HOTKEYSCAN_FNDELETE,
1866 TP_ACPI_HOTKEYSCAN_FNHOME,
1867 TP_ACPI_HOTKEYSCAN_FNEND,
1868 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1869 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1870 TP_ACPI_HOTKEYSCAN_FNSPACE,
1871 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1872 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1873 TP_ACPI_HOTKEYSCAN_MUTE,
1874 TP_ACPI_HOTKEYSCAN_THINKPAD,
1875 };
1876
1877 enum { /* Keys available through NVRAM polling */
1878 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1879 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1880 };
1881
1882 enum { /* Positions of some of the keys in hotkey masks */
1883 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1884 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1885 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1886 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1887 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1888 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1889 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1890 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1891 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1892 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1893 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1894 };
1895
1896 enum { /* NVRAM to ACPI HKEY group map */
1897 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1898 TP_ACPI_HKEY_ZOOM_MASK |
1899 TP_ACPI_HKEY_DISPSWTCH_MASK |
1900 TP_ACPI_HKEY_HIBERNATE_MASK,
1901 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1902 TP_ACPI_HKEY_BRGHTDWN_MASK,
1903 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1904 TP_ACPI_HKEY_VOLDWN_MASK |
1905 TP_ACPI_HKEY_MUTE_MASK,
1906 };
1907
1908 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1909 struct tp_nvram_state {
1910 u16 thinkpad_toggle:1;
1911 u16 zoom_toggle:1;
1912 u16 display_toggle:1;
1913 u16 thinklight_toggle:1;
1914 u16 hibernate_toggle:1;
1915 u16 displayexp_toggle:1;
1916 u16 display_state:1;
1917 u16 brightness_toggle:1;
1918 u16 volume_toggle:1;
1919 u16 mute:1;
1920
1921 u8 brightness_level;
1922 u8 volume_level;
1923 };
1924
1925 static struct task_struct *tpacpi_hotkey_task;
1926 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1927 static int hotkey_poll_freq = 10; /* Hz */
1928 static struct mutex hotkey_thread_mutex;
1929 static struct mutex hotkey_thread_data_mutex;
1930 static unsigned int hotkey_config_change;
1931
1932 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1933
1934 #define hotkey_source_mask 0U
1935
1936 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1937
1938 static struct mutex hotkey_mutex;
1939
1940 static enum { /* Reasons for waking up */
1941 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1942 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1943 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1944 } hotkey_wakeup_reason;
1945
1946 static int hotkey_autosleep_ack;
1947
1948 static u32 hotkey_orig_mask;
1949 static u32 hotkey_all_mask;
1950 static u32 hotkey_reserved_mask;
1951 static u32 hotkey_mask;
1952
1953 static unsigned int hotkey_report_mode;
1954
1955 static u16 *hotkey_keycode_map;
1956
1957 static struct attribute_set *hotkey_dev_attributes;
1958
1959 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1960 #define HOTKEY_CONFIG_CRITICAL_START \
1961 do { \
1962 mutex_lock(&hotkey_thread_data_mutex); \
1963 hotkey_config_change++; \
1964 } while (0);
1965 #define HOTKEY_CONFIG_CRITICAL_END \
1966 mutex_unlock(&hotkey_thread_data_mutex);
1967 #else
1968 #define HOTKEY_CONFIG_CRITICAL_START
1969 #define HOTKEY_CONFIG_CRITICAL_END
1970 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1971
1972 /* HKEY.MHKG() return bits */
1973 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1974
1975 static int hotkey_get_wlsw(void)
1976 {
1977 int status;
1978
1979 if (!tp_features.hotkey_wlsw)
1980 return -ENODEV;
1981
1982 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1983 if (dbg_wlswemul)
1984 return (tpacpi_wlsw_emulstate) ?
1985 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1986 #endif
1987
1988 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
1989 return -EIO;
1990
1991 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1992 }
1993
1994 static int hotkey_get_tablet_mode(int *status)
1995 {
1996 int s;
1997
1998 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1999 return -EIO;
2000
2001 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2002 return 0;
2003 }
2004
2005 /*
2006 * Call with hotkey_mutex held
2007 */
2008 static int hotkey_mask_get(void)
2009 {
2010 u32 m = 0;
2011
2012 if (tp_features.hotkey_mask) {
2013 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2014 return -EIO;
2015 }
2016 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
2017
2018 return 0;
2019 }
2020
2021 /*
2022 * Call with hotkey_mutex held
2023 */
2024 static int hotkey_mask_set(u32 mask)
2025 {
2026 int i;
2027 int rc = 0;
2028
2029 if (tp_features.hotkey_mask) {
2030 if (!tp_warned.hotkey_mask_ff &&
2031 (mask == 0xffff || mask == 0xffffff ||
2032 mask == 0xffffffff)) {
2033 tp_warned.hotkey_mask_ff = 1;
2034 printk(TPACPI_NOTICE
2035 "setting the hotkey mask to 0x%08x is likely "
2036 "not the best way to go about it\n", mask);
2037 printk(TPACPI_NOTICE
2038 "please consider using the driver defaults, "
2039 "and refer to up-to-date thinkpad-acpi "
2040 "documentation\n");
2041 }
2042
2043 HOTKEY_CONFIG_CRITICAL_START
2044 for (i = 0; i < 32; i++) {
2045 u32 m = 1 << i;
2046 /* enable in firmware mask only keys not in NVRAM
2047 * mode, but enable the key in the cached hotkey_mask
2048 * regardless of mode, or the key will end up
2049 * disabled by hotkey_mask_get() */
2050 if (!acpi_evalf(hkey_handle,
2051 NULL, "MHKM", "vdd", i + 1,
2052 !!((mask & ~hotkey_source_mask) & m))) {
2053 rc = -EIO;
2054 break;
2055 } else {
2056 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
2057 }
2058 }
2059 HOTKEY_CONFIG_CRITICAL_END
2060
2061 /* hotkey_mask_get must be called unconditionally below */
2062 if (!hotkey_mask_get() && !rc &&
2063 (hotkey_mask & ~hotkey_source_mask) !=
2064 (mask & ~hotkey_source_mask)) {
2065 printk(TPACPI_NOTICE
2066 "requested hot key mask 0x%08x, but "
2067 "firmware forced it to 0x%08x\n",
2068 mask, hotkey_mask);
2069 }
2070 } else {
2071 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2072 HOTKEY_CONFIG_CRITICAL_START
2073 hotkey_mask = mask & hotkey_source_mask;
2074 HOTKEY_CONFIG_CRITICAL_END
2075 hotkey_mask_get();
2076 if (hotkey_mask != mask) {
2077 printk(TPACPI_NOTICE
2078 "requested hot key mask 0x%08x, "
2079 "forced to 0x%08x (NVRAM poll mask is "
2080 "0x%08x): no firmware mask support\n",
2081 mask, hotkey_mask, hotkey_source_mask);
2082 }
2083 #else
2084 hotkey_mask_get();
2085 rc = -ENXIO;
2086 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2087 }
2088
2089 return rc;
2090 }
2091
2092 static int hotkey_status_get(int *status)
2093 {
2094 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2095 return -EIO;
2096
2097 return 0;
2098 }
2099
2100 static int hotkey_status_set(bool enable)
2101 {
2102 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2103 return -EIO;
2104
2105 return 0;
2106 }
2107
2108 static void tpacpi_input_send_tabletsw(void)
2109 {
2110 int state;
2111
2112 if (tp_features.hotkey_tablet &&
2113 !hotkey_get_tablet_mode(&state)) {
2114 mutex_lock(&tpacpi_inputdev_send_mutex);
2115
2116 input_report_switch(tpacpi_inputdev,
2117 SW_TABLET_MODE, !!state);
2118 input_sync(tpacpi_inputdev);
2119
2120 mutex_unlock(&tpacpi_inputdev_send_mutex);
2121 }
2122 }
2123
2124 static void tpacpi_input_send_key(unsigned int scancode)
2125 {
2126 unsigned int keycode;
2127
2128 keycode = hotkey_keycode_map[scancode];
2129
2130 if (keycode != KEY_RESERVED) {
2131 mutex_lock(&tpacpi_inputdev_send_mutex);
2132
2133 input_report_key(tpacpi_inputdev, keycode, 1);
2134 if (keycode == KEY_UNKNOWN)
2135 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2136 scancode);
2137 input_sync(tpacpi_inputdev);
2138
2139 input_report_key(tpacpi_inputdev, keycode, 0);
2140 if (keycode == KEY_UNKNOWN)
2141 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2142 scancode);
2143 input_sync(tpacpi_inputdev);
2144
2145 mutex_unlock(&tpacpi_inputdev_send_mutex);
2146 }
2147 }
2148
2149 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2150 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2151
2152 static void tpacpi_hotkey_send_key(unsigned int scancode)
2153 {
2154 tpacpi_input_send_key(scancode);
2155 if (hotkey_report_mode < 2) {
2156 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2157 0x80, 0x1001 + scancode);
2158 }
2159 }
2160
2161 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
2162 {
2163 u8 d;
2164
2165 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2166 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2167 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2168 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2169 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2170 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2171 }
2172 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2173 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2174 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2175 }
2176 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2177 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2178 n->displayexp_toggle =
2179 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2180 }
2181 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2182 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2183 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2184 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2185 n->brightness_toggle =
2186 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2187 }
2188 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2189 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2190 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2191 >> TP_NVRAM_POS_LEVEL_VOLUME;
2192 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2193 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2194 }
2195 }
2196
2197 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2198 do { \
2199 if ((mask & (1 << __scancode)) && \
2200 oldn->__member != newn->__member) \
2201 tpacpi_hotkey_send_key(__scancode); \
2202 } while (0)
2203
2204 #define TPACPI_MAY_SEND_KEY(__scancode) \
2205 do { if (mask & (1 << __scancode)) \
2206 tpacpi_hotkey_send_key(__scancode); } while (0)
2207
2208 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2209 struct tp_nvram_state *newn,
2210 u32 mask)
2211 {
2212 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2213 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2214 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2215 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2216
2217 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2218
2219 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2220
2221 /* handle volume */
2222 if (oldn->volume_toggle != newn->volume_toggle) {
2223 if (oldn->mute != newn->mute) {
2224 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2225 }
2226 if (oldn->volume_level > newn->volume_level) {
2227 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2228 } else if (oldn->volume_level < newn->volume_level) {
2229 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2230 } else if (oldn->mute == newn->mute) {
2231 /* repeated key presses that didn't change state */
2232 if (newn->mute) {
2233 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2234 } else if (newn->volume_level != 0) {
2235 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2236 } else {
2237 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2238 }
2239 }
2240 }
2241
2242 /* handle brightness */
2243 if (oldn->brightness_toggle != newn->brightness_toggle) {
2244 if (oldn->brightness_level < newn->brightness_level) {
2245 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2246 } else if (oldn->brightness_level > newn->brightness_level) {
2247 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2248 } else {
2249 /* repeated key presses that didn't change state */
2250 if (newn->brightness_level != 0) {
2251 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2252 } else {
2253 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2254 }
2255 }
2256 }
2257 }
2258
2259 #undef TPACPI_COMPARE_KEY
2260 #undef TPACPI_MAY_SEND_KEY
2261
2262 static int hotkey_kthread(void *data)
2263 {
2264 struct tp_nvram_state s[2];
2265 u32 mask;
2266 unsigned int si, so;
2267 unsigned long t;
2268 unsigned int change_detector, must_reset;
2269
2270 mutex_lock(&hotkey_thread_mutex);
2271
2272 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2273 goto exit;
2274
2275 set_freezable();
2276
2277 so = 0;
2278 si = 1;
2279 t = 0;
2280
2281 /* Initial state for compares */
2282 mutex_lock(&hotkey_thread_data_mutex);
2283 change_detector = hotkey_config_change;
2284 mask = hotkey_source_mask & hotkey_mask;
2285 mutex_unlock(&hotkey_thread_data_mutex);
2286 hotkey_read_nvram(&s[so], mask);
2287
2288 while (!kthread_should_stop() && hotkey_poll_freq) {
2289 if (t == 0)
2290 t = 1000/hotkey_poll_freq;
2291 t = msleep_interruptible(t);
2292 if (unlikely(kthread_should_stop()))
2293 break;
2294 must_reset = try_to_freeze();
2295 if (t > 0 && !must_reset)
2296 continue;
2297
2298 mutex_lock(&hotkey_thread_data_mutex);
2299 if (must_reset || hotkey_config_change != change_detector) {
2300 /* forget old state on thaw or config change */
2301 si = so;
2302 t = 0;
2303 change_detector = hotkey_config_change;
2304 }
2305 mask = hotkey_source_mask & hotkey_mask;
2306 mutex_unlock(&hotkey_thread_data_mutex);
2307
2308 if (likely(mask)) {
2309 hotkey_read_nvram(&s[si], mask);
2310 if (likely(si != so)) {
2311 hotkey_compare_and_issue_event(&s[so], &s[si],
2312 mask);
2313 }
2314 }
2315
2316 so = si;
2317 si ^= 1;
2318 }
2319
2320 exit:
2321 mutex_unlock(&hotkey_thread_mutex);
2322 return 0;
2323 }
2324
2325 static void hotkey_poll_stop_sync(void)
2326 {
2327 if (tpacpi_hotkey_task) {
2328 if (frozen(tpacpi_hotkey_task) ||
2329 freezing(tpacpi_hotkey_task))
2330 thaw_process(tpacpi_hotkey_task);
2331
2332 kthread_stop(tpacpi_hotkey_task);
2333 tpacpi_hotkey_task = NULL;
2334 mutex_lock(&hotkey_thread_mutex);
2335 /* at this point, the thread did exit */
2336 mutex_unlock(&hotkey_thread_mutex);
2337 }
2338 }
2339
2340 /* call with hotkey_mutex held */
2341 static void hotkey_poll_setup(int may_warn)
2342 {
2343 if ((hotkey_source_mask & hotkey_mask) != 0 &&
2344 hotkey_poll_freq > 0 &&
2345 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2346 if (!tpacpi_hotkey_task) {
2347 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2348 NULL, TPACPI_NVRAM_KTHREAD_NAME);
2349 if (IS_ERR(tpacpi_hotkey_task)) {
2350 tpacpi_hotkey_task = NULL;
2351 printk(TPACPI_ERR
2352 "could not create kernel thread "
2353 "for hotkey polling\n");
2354 }
2355 }
2356 } else {
2357 hotkey_poll_stop_sync();
2358 if (may_warn &&
2359 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
2360 printk(TPACPI_NOTICE
2361 "hot keys 0x%08x require polling, "
2362 "which is currently disabled\n",
2363 hotkey_source_mask);
2364 }
2365 }
2366 }
2367
2368 static void hotkey_poll_setup_safe(int may_warn)
2369 {
2370 mutex_lock(&hotkey_mutex);
2371 hotkey_poll_setup(may_warn);
2372 mutex_unlock(&hotkey_mutex);
2373 }
2374
2375 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2376
2377 static void hotkey_poll_setup_safe(int __unused)
2378 {
2379 }
2380
2381 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2382
2383 static int hotkey_inputdev_open(struct input_dev *dev)
2384 {
2385 switch (tpacpi_lifecycle) {
2386 case TPACPI_LIFE_INIT:
2387 /*
2388 * hotkey_init will call hotkey_poll_setup_safe
2389 * at the appropriate moment
2390 */
2391 return 0;
2392 case TPACPI_LIFE_EXITING:
2393 return -EBUSY;
2394 case TPACPI_LIFE_RUNNING:
2395 hotkey_poll_setup_safe(0);
2396 return 0;
2397 }
2398
2399 /* Should only happen if tpacpi_lifecycle is corrupt */
2400 BUG();
2401 return -EBUSY;
2402 }
2403
2404 static void hotkey_inputdev_close(struct input_dev *dev)
2405 {
2406 /* disable hotkey polling when possible */
2407 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2408 hotkey_poll_setup_safe(0);
2409 }
2410
2411 /* sysfs hotkey enable ------------------------------------------------- */
2412 static ssize_t hotkey_enable_show(struct device *dev,
2413 struct device_attribute *attr,
2414 char *buf)
2415 {
2416 int res, status;
2417
2418 printk_deprecated_attribute("hotkey_enable",
2419 "Hotkey reporting is always enabled");
2420
2421 res = hotkey_status_get(&status);
2422 if (res)
2423 return res;
2424
2425 return snprintf(buf, PAGE_SIZE, "%d\n", status);
2426 }
2427
2428 static ssize_t hotkey_enable_store(struct device *dev,
2429 struct device_attribute *attr,
2430 const char *buf, size_t count)
2431 {
2432 unsigned long t;
2433
2434 printk_deprecated_attribute("hotkey_enable",
2435 "Hotkeys can be disabled through hotkey_mask");
2436
2437 if (parse_strtoul(buf, 1, &t))
2438 return -EINVAL;
2439
2440 if (t == 0)
2441 return -EPERM;
2442
2443 return count;
2444 }
2445
2446 static struct device_attribute dev_attr_hotkey_enable =
2447 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2448 hotkey_enable_show, hotkey_enable_store);
2449
2450 /* sysfs hotkey mask --------------------------------------------------- */
2451 static ssize_t hotkey_mask_show(struct device *dev,
2452 struct device_attribute *attr,
2453 char *buf)
2454 {
2455 int res;
2456
2457 if (mutex_lock_killable(&hotkey_mutex))
2458 return -ERESTARTSYS;
2459 res = hotkey_mask_get();
2460 mutex_unlock(&hotkey_mutex);
2461
2462 return (res)?
2463 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2464 }
2465
2466 static ssize_t hotkey_mask_store(struct device *dev,
2467 struct device_attribute *attr,
2468 const char *buf, size_t count)
2469 {
2470 unsigned long t;
2471 int res;
2472
2473 if (parse_strtoul(buf, 0xffffffffUL, &t))
2474 return -EINVAL;
2475
2476 if (mutex_lock_killable(&hotkey_mutex))
2477 return -ERESTARTSYS;
2478
2479 res = hotkey_mask_set(t);
2480
2481 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2482 hotkey_poll_setup(1);
2483 #endif
2484
2485 mutex_unlock(&hotkey_mutex);
2486
2487 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2488
2489 return (res) ? res : count;
2490 }
2491
2492 static struct device_attribute dev_attr_hotkey_mask =
2493 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2494 hotkey_mask_show, hotkey_mask_store);
2495
2496 /* sysfs hotkey bios_enabled ------------------------------------------- */
2497 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2498 struct device_attribute *attr,
2499 char *buf)
2500 {
2501 return sprintf(buf, "0\n");
2502 }
2503
2504 static struct device_attribute dev_attr_hotkey_bios_enabled =
2505 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2506
2507 /* sysfs hotkey bios_mask ---------------------------------------------- */
2508 static ssize_t hotkey_bios_mask_show(struct device *dev,
2509 struct device_attribute *attr,
2510 char *buf)
2511 {
2512 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2513 }
2514
2515 static struct device_attribute dev_attr_hotkey_bios_mask =
2516 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2517
2518 /* sysfs hotkey all_mask ----------------------------------------------- */
2519 static ssize_t hotkey_all_mask_show(struct device *dev,
2520 struct device_attribute *attr,
2521 char *buf)
2522 {
2523 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2524 hotkey_all_mask | hotkey_source_mask);
2525 }
2526
2527 static struct device_attribute dev_attr_hotkey_all_mask =
2528 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2529
2530 /* sysfs hotkey recommended_mask --------------------------------------- */
2531 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2532 struct device_attribute *attr,
2533 char *buf)
2534 {
2535 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2536 (hotkey_all_mask | hotkey_source_mask)
2537 & ~hotkey_reserved_mask);
2538 }
2539
2540 static struct device_attribute dev_attr_hotkey_recommended_mask =
2541 __ATTR(hotkey_recommended_mask, S_IRUGO,
2542 hotkey_recommended_mask_show, NULL);
2543
2544 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2545
2546 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2547 static ssize_t hotkey_source_mask_show(struct device *dev,
2548 struct device_attribute *attr,
2549 char *buf)
2550 {
2551 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2552 }
2553
2554 static ssize_t hotkey_source_mask_store(struct device *dev,
2555 struct device_attribute *attr,
2556 const char *buf, size_t count)
2557 {
2558 unsigned long t;
2559
2560 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2561 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2562 return -EINVAL;
2563
2564 if (mutex_lock_killable(&hotkey_mutex))
2565 return -ERESTARTSYS;
2566
2567 HOTKEY_CONFIG_CRITICAL_START
2568 hotkey_source_mask = t;
2569 HOTKEY_CONFIG_CRITICAL_END
2570
2571 hotkey_poll_setup(1);
2572
2573 mutex_unlock(&hotkey_mutex);
2574
2575 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2576
2577 return count;
2578 }
2579
2580 static struct device_attribute dev_attr_hotkey_source_mask =
2581 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2582 hotkey_source_mask_show, hotkey_source_mask_store);
2583
2584 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2585 static ssize_t hotkey_poll_freq_show(struct device *dev,
2586 struct device_attribute *attr,
2587 char *buf)
2588 {
2589 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2590 }
2591
2592 static ssize_t hotkey_poll_freq_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, 25, &t))
2599 return -EINVAL;
2600
2601 if (mutex_lock_killable(&hotkey_mutex))
2602 return -ERESTARTSYS;
2603
2604 hotkey_poll_freq = t;
2605
2606 hotkey_poll_setup(1);
2607 mutex_unlock(&hotkey_mutex);
2608
2609 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2610
2611 return count;
2612 }
2613
2614 static struct device_attribute dev_attr_hotkey_poll_freq =
2615 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2616 hotkey_poll_freq_show, hotkey_poll_freq_store);
2617
2618 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2619
2620 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2621 static ssize_t hotkey_radio_sw_show(struct device *dev,
2622 struct device_attribute *attr,
2623 char *buf)
2624 {
2625 int res;
2626 res = hotkey_get_wlsw();
2627 if (res < 0)
2628 return res;
2629
2630 /* Opportunistic update */
2631 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2632
2633 return snprintf(buf, PAGE_SIZE, "%d\n",
2634 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2635 }
2636
2637 static struct device_attribute dev_attr_hotkey_radio_sw =
2638 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2639
2640 static void hotkey_radio_sw_notify_change(void)
2641 {
2642 if (tp_features.hotkey_wlsw)
2643 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2644 "hotkey_radio_sw");
2645 }
2646
2647 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2648 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2649 struct device_attribute *attr,
2650 char *buf)
2651 {
2652 int res, s;
2653 res = hotkey_get_tablet_mode(&s);
2654 if (res < 0)
2655 return res;
2656
2657 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2658 }
2659
2660 static struct device_attribute dev_attr_hotkey_tablet_mode =
2661 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2662
2663 static void hotkey_tablet_mode_notify_change(void)
2664 {
2665 if (tp_features.hotkey_tablet)
2666 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2667 "hotkey_tablet_mode");
2668 }
2669
2670 /* sysfs hotkey report_mode -------------------------------------------- */
2671 static ssize_t hotkey_report_mode_show(struct device *dev,
2672 struct device_attribute *attr,
2673 char *buf)
2674 {
2675 return snprintf(buf, PAGE_SIZE, "%d\n",
2676 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2677 }
2678
2679 static struct device_attribute dev_attr_hotkey_report_mode =
2680 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2681
2682 /* sysfs wakeup reason (pollable) -------------------------------------- */
2683 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2684 struct device_attribute *attr,
2685 char *buf)
2686 {
2687 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2688 }
2689
2690 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2691 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2692
2693 static void hotkey_wakeup_reason_notify_change(void)
2694 {
2695 if (tp_features.hotkey_mask)
2696 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2697 "wakeup_reason");
2698 }
2699
2700 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2701 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2702 struct device_attribute *attr,
2703 char *buf)
2704 {
2705 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2706 }
2707
2708 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2709 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2710 hotkey_wakeup_hotunplug_complete_show, NULL);
2711
2712 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2713 {
2714 if (tp_features.hotkey_mask)
2715 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2716 "wakeup_hotunplug_complete");
2717 }
2718
2719 /* --------------------------------------------------------------------- */
2720
2721 static struct attribute *hotkey_attributes[] __initdata = {
2722 &dev_attr_hotkey_enable.attr,
2723 &dev_attr_hotkey_bios_enabled.attr,
2724 &dev_attr_hotkey_report_mode.attr,
2725 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2726 &dev_attr_hotkey_mask.attr,
2727 &dev_attr_hotkey_all_mask.attr,
2728 &dev_attr_hotkey_recommended_mask.attr,
2729 &dev_attr_hotkey_source_mask.attr,
2730 &dev_attr_hotkey_poll_freq.attr,
2731 #endif
2732 };
2733
2734 static struct attribute *hotkey_mask_attributes[] __initdata = {
2735 &dev_attr_hotkey_bios_mask.attr,
2736 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2737 &dev_attr_hotkey_mask.attr,
2738 &dev_attr_hotkey_all_mask.attr,
2739 &dev_attr_hotkey_recommended_mask.attr,
2740 #endif
2741 &dev_attr_hotkey_wakeup_reason.attr,
2742 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2743 };
2744
2745 /*
2746 * Sync both the hw and sw blocking state of all switches
2747 */
2748 static void tpacpi_send_radiosw_update(void)
2749 {
2750 int wlsw;
2751
2752 /*
2753 * We must sync all rfkill controllers *before* issuing any
2754 * rfkill input events, or we will race the rfkill core input
2755 * handler.
2756 *
2757 * tpacpi_inputdev_send_mutex works as a syncronization point
2758 * for the above.
2759 *
2760 * We optimize to avoid numerous calls to hotkey_get_wlsw.
2761 */
2762
2763 wlsw = hotkey_get_wlsw();
2764
2765 /* Sync hw blocking state first if it is hw-blocked */
2766 if (wlsw == TPACPI_RFK_RADIO_OFF)
2767 tpacpi_rfk_update_hwblock_state(true);
2768
2769 /* Sync sw blocking state */
2770 tpacpi_rfk_update_swstate_all();
2771
2772 /* Sync hw blocking state last if it is hw-unblocked */
2773 if (wlsw == TPACPI_RFK_RADIO_ON)
2774 tpacpi_rfk_update_hwblock_state(false);
2775
2776 /* Issue rfkill input event for WLSW switch */
2777 if (!(wlsw < 0)) {
2778 mutex_lock(&tpacpi_inputdev_send_mutex);
2779
2780 input_report_switch(tpacpi_inputdev,
2781 SW_RFKILL_ALL, (wlsw > 0));
2782 input_sync(tpacpi_inputdev);
2783
2784 mutex_unlock(&tpacpi_inputdev_send_mutex);
2785 }
2786
2787 /*
2788 * this can be unconditional, as we will poll state again
2789 * if userspace uses the notify to read data
2790 */
2791 hotkey_radio_sw_notify_change();
2792 }
2793
2794 static void hotkey_exit(void)
2795 {
2796 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2797 hotkey_poll_stop_sync();
2798 #endif
2799
2800 if (hotkey_dev_attributes)
2801 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2802
2803 kfree(hotkey_keycode_map);
2804
2805 if (tp_features.hotkey) {
2806 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2807 "restoring original hot key mask\n");
2808 /* no short-circuit boolean operator below! */
2809 if ((hotkey_mask_set(hotkey_orig_mask) |
2810 hotkey_status_set(false)) != 0)
2811 printk(TPACPI_ERR
2812 "failed to restore hot key mask "
2813 "to BIOS defaults\n");
2814 }
2815 }
2816
2817 static int __init hotkey_init(struct ibm_init_struct *iibm)
2818 {
2819 /* Requirements for changing the default keymaps:
2820 *
2821 * 1. Many of the keys are mapped to KEY_RESERVED for very
2822 * good reasons. Do not change them unless you have deep
2823 * knowledge on the IBM and Lenovo ThinkPad firmware for
2824 * the various ThinkPad models. The driver behaves
2825 * differently for KEY_RESERVED: such keys have their
2826 * hot key mask *unset* in mask_recommended, and also
2827 * in the initial hot key mask programmed into the
2828 * firmware at driver load time, which means the firm-
2829 * ware may react very differently if you change them to
2830 * something else;
2831 *
2832 * 2. You must be subscribed to the linux-thinkpad and
2833 * ibm-acpi-devel mailing lists, and you should read the
2834 * list archives since 2007 if you want to change the
2835 * keymaps. This requirement exists so that you will
2836 * know the past history of problems with the thinkpad-
2837 * acpi driver keymaps, and also that you will be
2838 * listening to any bug reports;
2839 *
2840 * 3. Do not send thinkpad-acpi specific patches directly to
2841 * for merging, *ever*. Send them to the linux-acpi
2842 * mailinglist for comments. Merging is to be done only
2843 * through acpi-test and the ACPI maintainer.
2844 *
2845 * If the above is too much to ask, don't change the keymap.
2846 * Ask the thinkpad-acpi maintainer to do it, instead.
2847 */
2848 static u16 ibm_keycode_map[] __initdata = {
2849 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2850 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2851 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2852 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2853
2854 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2855 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2856 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2857 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2858
2859 /* brightness: firmware always reacts to them, unless
2860 * X.org did some tricks in the radeon BIOS scratch
2861 * registers of *some* models */
2862 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2863 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2864
2865 /* Thinklight: firmware always react to it */
2866 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2867
2868 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2869 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2870
2871 /* Volume: firmware always react to it and reprograms
2872 * the built-in *extra* mixer. Never map it to control
2873 * another mixer by default. */
2874 KEY_RESERVED, /* 0x14: VOLUME UP */
2875 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2876 KEY_RESERVED, /* 0x16: MUTE */
2877
2878 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2879
2880 /* (assignments unknown, please report if found) */
2881 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2882 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2883 };
2884 static u16 lenovo_keycode_map[] __initdata = {
2885 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2886 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2887 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2888 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2889
2890 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2891 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2892 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2893 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2894
2895 /* These either have to go through ACPI video, or
2896 * act like in the IBM ThinkPads, so don't ever
2897 * enable them by default */
2898 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2899 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2900
2901 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2902
2903 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2904 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2905
2906 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2907 * react to it and reprograms the built-in *extra* mixer.
2908 * Never map it to control another mixer by default.
2909 *
2910 * T60?, T61, R60?, R61: firmware and EC tries to send
2911 * these over the regular keyboard, so these are no-ops,
2912 * but there are still weird bugs re. MUTE, so do not
2913 * change unless you get test reports from all Lenovo
2914 * models. May cause the BIOS to interfere with the
2915 * HDA mixer.
2916 */
2917 KEY_RESERVED, /* 0x14: VOLUME UP */
2918 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2919 KEY_RESERVED, /* 0x16: MUTE */
2920
2921 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2922
2923 /* (assignments unknown, please report if found) */
2924 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2925 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2926 };
2927
2928 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2929 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2930 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2931
2932 int res, i;
2933 int status;
2934 int hkeyv;
2935
2936 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2937 "initializing hotkey subdriver\n");
2938
2939 BUG_ON(!tpacpi_inputdev);
2940 BUG_ON(tpacpi_inputdev->open != NULL ||
2941 tpacpi_inputdev->close != NULL);
2942
2943 TPACPI_ACPIHANDLE_INIT(hkey);
2944 mutex_init(&hotkey_mutex);
2945
2946 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2947 mutex_init(&hotkey_thread_mutex);
2948 mutex_init(&hotkey_thread_data_mutex);
2949 #endif
2950
2951 /* hotkey not supported on 570 */
2952 tp_features.hotkey = hkey_handle != NULL;
2953
2954 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2955 "hotkeys are %s\n",
2956 str_supported(tp_features.hotkey));
2957
2958 if (!tp_features.hotkey)
2959 return 1;
2960
2961 tpacpi_disable_brightness_delay();
2962
2963 hotkey_dev_attributes = create_attr_set(13, NULL);
2964 if (!hotkey_dev_attributes)
2965 return -ENOMEM;
2966 res = add_many_to_attr_set(hotkey_dev_attributes,
2967 hotkey_attributes,
2968 ARRAY_SIZE(hotkey_attributes));
2969 if (res)
2970 goto err_exit;
2971
2972 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2973 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2974 for HKEY interface version 0x100 */
2975 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2976 if ((hkeyv >> 8) != 1) {
2977 printk(TPACPI_ERR "unknown version of the "
2978 "HKEY interface: 0x%x\n", hkeyv);
2979 printk(TPACPI_ERR "please report this to %s\n",
2980 TPACPI_MAIL);
2981 } else {
2982 /*
2983 * MHKV 0x100 in A31, R40, R40e,
2984 * T4x, X31, and later
2985 */
2986 tp_features.hotkey_mask = 1;
2987 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2988 "firmware HKEY interface version: 0x%x\n",
2989 hkeyv);
2990 }
2991 }
2992
2993 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2994 "hotkey masks are %s\n",
2995 str_supported(tp_features.hotkey_mask));
2996
2997 if (tp_features.hotkey_mask) {
2998 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2999 "MHKA", "qd")) {
3000 printk(TPACPI_ERR
3001 "missing MHKA handler, "
3002 "please report this to %s\n",
3003 TPACPI_MAIL);
3004 /* FN+F12, FN+F4, FN+F3 */
3005 hotkey_all_mask = 0x080cU;
3006 }
3007 }
3008
3009 /* hotkey_source_mask *must* be zero for
3010 * the first hotkey_mask_get */
3011 if (tp_features.hotkey_mask) {
3012 res = hotkey_mask_get();
3013 if (res)
3014 goto err_exit;
3015
3016 hotkey_orig_mask = hotkey_mask;
3017 res = add_many_to_attr_set(
3018 hotkey_dev_attributes,
3019 hotkey_mask_attributes,
3020 ARRAY_SIZE(hotkey_mask_attributes));
3021 if (res)
3022 goto err_exit;
3023 }
3024
3025 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3026 if (tp_features.hotkey_mask) {
3027 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3028 & ~hotkey_all_mask;
3029 } else {
3030 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
3031 }
3032
3033 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3034 "hotkey source mask 0x%08x, polling freq %d\n",
3035 hotkey_source_mask, hotkey_poll_freq);
3036 #endif
3037
3038 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3039 if (dbg_wlswemul) {
3040 tp_features.hotkey_wlsw = 1;
3041 printk(TPACPI_INFO
3042 "radio switch emulation enabled\n");
3043 } else
3044 #endif
3045 /* Not all thinkpads have a hardware radio switch */
3046 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3047 tp_features.hotkey_wlsw = 1;
3048 printk(TPACPI_INFO
3049 "radio switch found; radios are %s\n",
3050 enabled(status, 0));
3051 }
3052 if (tp_features.hotkey_wlsw)
3053 res = add_to_attr_set(hotkey_dev_attributes,
3054 &dev_attr_hotkey_radio_sw.attr);
3055
3056 /* For X41t, X60t, X61t Tablets... */
3057 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3058 tp_features.hotkey_tablet = 1;
3059 printk(TPACPI_INFO
3060 "possible tablet mode switch found; "
3061 "ThinkPad in %s mode\n",
3062 (status & TP_HOTKEY_TABLET_MASK)?
3063 "tablet" : "laptop");
3064 res = add_to_attr_set(hotkey_dev_attributes,
3065 &dev_attr_hotkey_tablet_mode.attr);
3066 }
3067
3068 if (!res)
3069 res = register_attr_set_with_sysfs(
3070 hotkey_dev_attributes,
3071 &tpacpi_pdev->dev.kobj);
3072 if (res)
3073 goto err_exit;
3074
3075 /* Set up key map */
3076
3077 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3078 GFP_KERNEL);
3079 if (!hotkey_keycode_map) {
3080 printk(TPACPI_ERR
3081 "failed to allocate memory for key map\n");
3082 res = -ENOMEM;
3083 goto err_exit;
3084 }
3085
3086 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3087 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3088 "using Lenovo default hot key map\n");
3089 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3090 TPACPI_HOTKEY_MAP_SIZE);
3091 } else {
3092 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3093 "using IBM default hot key map\n");
3094 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3095 TPACPI_HOTKEY_MAP_SIZE);
3096 }
3097
3098 set_bit(EV_KEY, tpacpi_inputdev->evbit);
3099 set_bit(EV_MSC, tpacpi_inputdev->evbit);
3100 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3101 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3102 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3103 tpacpi_inputdev->keycode = hotkey_keycode_map;
3104 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3105 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3106 set_bit(hotkey_keycode_map[i],
3107 tpacpi_inputdev->keybit);
3108 } else {
3109 if (i < sizeof(hotkey_reserved_mask)*8)
3110 hotkey_reserved_mask |= 1 << i;
3111 }
3112 }
3113
3114 if (tp_features.hotkey_wlsw) {
3115 set_bit(EV_SW, tpacpi_inputdev->evbit);
3116 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3117 }
3118 if (tp_features.hotkey_tablet) {
3119 set_bit(EV_SW, tpacpi_inputdev->evbit);
3120 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3121 }
3122
3123 /* Do not issue duplicate brightness change events to
3124 * userspace */
3125 if (!tp_features.bright_acpimode)
3126 /* update bright_acpimode... */
3127 tpacpi_check_std_acpi_brightness_support();
3128
3129 if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3130 printk(TPACPI_INFO
3131 "This ThinkPad has standard ACPI backlight "
3132 "brightness control, supported by the ACPI "
3133 "video driver\n");
3134 printk(TPACPI_NOTICE
3135 "Disabling thinkpad-acpi brightness events "
3136 "by default...\n");
3137
3138 /* The hotkey_reserved_mask change below is not
3139 * necessary while the keys are at KEY_RESERVED in the
3140 * default map, but better safe than sorry, leave it
3141 * here as a marker of what we have to do, especially
3142 * when we finally become able to set this at runtime
3143 * on response to X.org requests */
3144 hotkey_reserved_mask |=
3145 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3146 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3147 }
3148
3149 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3150 "enabling firmware HKEY event interface...\n");
3151 res = hotkey_status_set(true);
3152 if (res) {
3153 hotkey_exit();
3154 return res;
3155 }
3156 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
3157 & ~hotkey_reserved_mask)
3158 | hotkey_orig_mask);
3159 if (res < 0 && res != -ENXIO) {
3160 hotkey_exit();
3161 return res;
3162 }
3163
3164 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3165 "legacy ibm/hotkey event reporting over procfs %s\n",
3166 (hotkey_report_mode < 2) ?
3167 "enabled" : "disabled");
3168
3169 tpacpi_inputdev->open = &hotkey_inputdev_open;
3170 tpacpi_inputdev->close = &hotkey_inputdev_close;
3171
3172 hotkey_poll_setup_safe(1);
3173 tpacpi_send_radiosw_update();
3174 tpacpi_input_send_tabletsw();
3175
3176 return 0;
3177
3178 err_exit:
3179 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3180 hotkey_dev_attributes = NULL;
3181
3182 return (res < 0)? res : 1;
3183 }
3184
3185 static bool hotkey_notify_hotkey(const u32 hkey,
3186 bool *send_acpi_ev,
3187 bool *ignore_acpi_ev)
3188 {
3189 /* 0x1000-0x1FFF: key presses */
3190 unsigned int scancode = hkey & 0xfff;
3191 *send_acpi_ev = true;
3192 *ignore_acpi_ev = false;
3193
3194 if (scancode > 0 && scancode < 0x21) {
3195 scancode--;
3196 if (!(hotkey_source_mask & (1 << scancode))) {
3197 tpacpi_input_send_key(scancode);
3198 *send_acpi_ev = false;
3199 } else {
3200 *ignore_acpi_ev = true;
3201 }
3202 return true;
3203 }
3204 return false;
3205 }
3206
3207 static bool hotkey_notify_wakeup(const u32 hkey,
3208 bool *send_acpi_ev,
3209 bool *ignore_acpi_ev)
3210 {
3211 /* 0x2000-0x2FFF: Wakeup reason */
3212 *send_acpi_ev = true;
3213 *ignore_acpi_ev = false;
3214
3215 switch (hkey) {
3216 case 0x2304: /* suspend, undock */
3217 case 0x2404: /* hibernation, undock */
3218 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3219 *ignore_acpi_ev = true;
3220 break;
3221
3222 case 0x2305: /* suspend, bay eject */
3223 case 0x2405: /* hibernation, bay eject */
3224 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3225 *ignore_acpi_ev = true;
3226 break;
3227
3228 case 0x2313: /* Battery on critical low level (S3) */
3229 case 0x2413: /* Battery on critical low level (S4) */
3230 printk(TPACPI_ALERT
3231 "EMERGENCY WAKEUP: battery almost empty\n");
3232 /* how to auto-heal: */
3233 /* 2313: woke up from S3, go to S4/S5 */
3234 /* 2413: woke up from S4, go to S5 */
3235 break;
3236
3237 default:
3238 return false;
3239 }
3240
3241 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3242 printk(TPACPI_INFO
3243 "woke up due to a hot-unplug "
3244 "request...\n");
3245 hotkey_wakeup_reason_notify_change();
3246 }
3247 return true;
3248 }
3249
3250 static bool hotkey_notify_usrevent(const u32 hkey,
3251 bool *send_acpi_ev,
3252 bool *ignore_acpi_ev)
3253 {
3254 /* 0x5000-0x5FFF: human interface helpers */
3255 *send_acpi_ev = true;
3256 *ignore_acpi_ev = false;
3257
3258 switch (hkey) {
3259 case 0x5010: /* Lenovo new BIOS: brightness changed */
3260 case 0x500b: /* X61t: tablet pen inserted into bay */
3261 case 0x500c: /* X61t: tablet pen removed from bay */
3262 return true;
3263
3264 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3265 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3266 tpacpi_input_send_tabletsw();
3267 hotkey_tablet_mode_notify_change();
3268 *send_acpi_ev = false;
3269 return true;
3270
3271 case 0x5001:
3272 case 0x5002:
3273 /* LID switch events. Do not propagate */
3274 *ignore_acpi_ev = true;
3275 return true;
3276
3277 default:
3278 return false;
3279 }
3280 }
3281
3282 static bool hotkey_notify_thermal(const u32 hkey,
3283 bool *send_acpi_ev,
3284 bool *ignore_acpi_ev)
3285 {
3286 /* 0x6000-0x6FFF: thermal alarms */
3287 *send_acpi_ev = true;
3288 *ignore_acpi_ev = false;
3289
3290 switch (hkey) {
3291 case 0x6011:
3292 printk(TPACPI_CRIT
3293 "THERMAL ALARM: battery is too hot!\n");
3294 /* recommended action: warn user through gui */
3295 return true;
3296 case 0x6012:
3297 printk(TPACPI_ALERT
3298 "THERMAL EMERGENCY: battery is extremely hot!\n");
3299 /* recommended action: immediate sleep/hibernate */
3300 return true;
3301 case 0x6021:
3302 printk(TPACPI_CRIT
3303 "THERMAL ALARM: "
3304 "a sensor reports something is too hot!\n");
3305 /* recommended action: warn user through gui, that */
3306 /* some internal component is too hot */
3307 return true;
3308 case 0x6022:
3309 printk(TPACPI_ALERT
3310 "THERMAL EMERGENCY: "
3311 "a sensor reports something is extremely hot!\n");
3312 /* recommended action: immediate sleep/hibernate */
3313 return true;
3314 case 0x6030:
3315 printk(TPACPI_INFO
3316 "EC reports that Thermal Table has changed\n");
3317 /* recommended action: do nothing, we don't have
3318 * Lenovo ATM information */
3319 return true;
3320 default:
3321 printk(TPACPI_ALERT
3322 "THERMAL ALERT: unknown thermal alarm received\n");
3323 return false;
3324 }
3325 }
3326
3327 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3328 {
3329 u32 hkey;
3330 bool send_acpi_ev;
3331 bool ignore_acpi_ev;
3332 bool known_ev;
3333
3334 if (event != 0x80) {
3335 printk(TPACPI_ERR
3336 "unknown HKEY notification event %d\n", event);
3337 /* forward it to userspace, maybe it knows how to handle it */
3338 acpi_bus_generate_netlink_event(
3339 ibm->acpi->device->pnp.device_class,
3340 dev_name(&ibm->acpi->device->dev),
3341 event, 0);
3342 return;
3343 }
3344
3345 while (1) {
3346 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3347 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3348 return;
3349 }
3350
3351 if (hkey == 0) {
3352 /* queue empty */
3353 return;
3354 }
3355
3356 send_acpi_ev = true;
3357 ignore_acpi_ev = false;
3358
3359 switch (hkey >> 12) {
3360 case 1:
3361 /* 0x1000-0x1FFF: key presses */
3362 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3363 &ignore_acpi_ev);
3364 break;
3365 case 2:
3366 /* 0x2000-0x2FFF: Wakeup reason */
3367 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3368 &ignore_acpi_ev);
3369 break;
3370 case 3:
3371 /* 0x3000-0x3FFF: bay-related wakeups */
3372 if (hkey == 0x3003) {
3373 hotkey_autosleep_ack = 1;
3374 printk(TPACPI_INFO
3375 "bay ejected\n");
3376 hotkey_wakeup_hotunplug_complete_notify_change();
3377 known_ev = true;
3378 } else {
3379 known_ev = false;
3380 }
3381 break;
3382 case 4:
3383 /* 0x4000-0x4FFF: dock-related wakeups */
3384 if (hkey == 0x4003) {
3385 hotkey_autosleep_ack = 1;
3386 printk(TPACPI_INFO
3387 "undocked\n");
3388 hotkey_wakeup_hotunplug_complete_notify_change();
3389 known_ev = true;
3390 } else {
3391 known_ev = false;
3392 }
3393 break;
3394 case 5:
3395 /* 0x5000-0x5FFF: human interface helpers */
3396 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3397 &ignore_acpi_ev);
3398 break;
3399 case 6:
3400 /* 0x6000-0x6FFF: thermal alarms */
3401 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3402 &ignore_acpi_ev);
3403 break;
3404 case 7:
3405 /* 0x7000-0x7FFF: misc */
3406 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3407 tpacpi_send_radiosw_update();
3408 send_acpi_ev = 0;
3409 known_ev = true;
3410 break;
3411 }
3412 /* fallthrough to default */
3413 default:
3414 known_ev = false;
3415 }
3416 if (!known_ev) {
3417 printk(TPACPI_NOTICE
3418 "unhandled HKEY event 0x%04x\n", hkey);
3419 printk(TPACPI_NOTICE
3420 "please report the conditions when this "
3421 "event happened to %s\n", TPACPI_MAIL);
3422 }
3423
3424 /* Legacy events */
3425 if (!ignore_acpi_ev &&
3426 (send_acpi_ev || hotkey_report_mode < 2)) {
3427 acpi_bus_generate_proc_event(ibm->acpi->device,
3428 event, hkey);
3429 }
3430
3431 /* netlink events */
3432 if (!ignore_acpi_ev && send_acpi_ev) {
3433 acpi_bus_generate_netlink_event(
3434 ibm->acpi->device->pnp.device_class,
3435 dev_name(&ibm->acpi->device->dev),
3436 event, hkey);
3437 }
3438 }
3439 }
3440
3441 static void hotkey_suspend(pm_message_t state)
3442 {
3443 /* Do these on suspend, we get the events on early resume! */
3444 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3445 hotkey_autosleep_ack = 0;
3446 }
3447
3448 static void hotkey_resume(void)
3449 {
3450 tpacpi_disable_brightness_delay();
3451
3452 if (hotkey_mask_get())
3453 printk(TPACPI_ERR
3454 "error while trying to read hot key mask "
3455 "from firmware\n");
3456 tpacpi_send_radiosw_update();
3457 hotkey_tablet_mode_notify_change();
3458 hotkey_wakeup_reason_notify_change();
3459 hotkey_wakeup_hotunplug_complete_notify_change();
3460 hotkey_poll_setup_safe(0);
3461 }
3462
3463 /* procfs -------------------------------------------------------------- */
3464 static int hotkey_read(char *p)
3465 {
3466 int res, status;
3467 int len = 0;
3468
3469 if (!tp_features.hotkey) {
3470 len += sprintf(p + len, "status:\t\tnot supported\n");
3471 return len;
3472 }
3473
3474 if (mutex_lock_killable(&hotkey_mutex))
3475 return -ERESTARTSYS;
3476 res = hotkey_status_get(&status);
3477 if (!res)
3478 res = hotkey_mask_get();
3479 mutex_unlock(&hotkey_mutex);
3480 if (res)
3481 return res;
3482
3483 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3484 if (tp_features.hotkey_mask) {
3485 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3486 len += sprintf(p + len,
3487 "commands:\tenable, disable, reset, <mask>\n");
3488 } else {
3489 len += sprintf(p + len, "mask:\t\tnot supported\n");
3490 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3491 }
3492
3493 return len;
3494 }
3495
3496 static void hotkey_enabledisable_warn(bool enable)
3497 {
3498 tpacpi_log_usertask("procfs hotkey enable/disable");
3499 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3500 TPACPI_WARN
3501 "hotkey enable/disable functionality has been "
3502 "removed from the driver. Hotkeys are always "
3503 "enabled\n"))
3504 printk(TPACPI_ERR
3505 "Please remove the hotkey=enable module "
3506 "parameter, it is deprecated. Hotkeys are always "
3507 "enabled\n");
3508 }
3509
3510 static int hotkey_write(char *buf)
3511 {
3512 int res;
3513 u32 mask;
3514 char *cmd;
3515
3516 if (!tp_features.hotkey)
3517 return -ENODEV;
3518
3519 if (mutex_lock_killable(&hotkey_mutex))
3520 return -ERESTARTSYS;
3521
3522 mask = hotkey_mask;
3523
3524 res = 0;
3525 while ((cmd = next_cmd(&buf))) {
3526 if (strlencmp(cmd, "enable") == 0) {
3527 hotkey_enabledisable_warn(1);
3528 } else if (strlencmp(cmd, "disable") == 0) {
3529 hotkey_enabledisable_warn(0);
3530 res = -EPERM;
3531 } else if (strlencmp(cmd, "reset") == 0) {
3532 mask = hotkey_orig_mask;
3533 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3534 /* mask set */
3535 } else if (sscanf(cmd, "%x", &mask) == 1) {
3536 /* mask set */
3537 } else {
3538 res = -EINVAL;
3539 goto errexit;
3540 }
3541 }
3542
3543 if (!res)
3544 tpacpi_disclose_usertask("procfs hotkey",
3545 "set mask to 0x%08x\n", mask);
3546
3547 if (!res && mask != hotkey_mask)
3548 res = hotkey_mask_set(mask);
3549
3550 errexit:
3551 mutex_unlock(&hotkey_mutex);
3552 return res;
3553 }
3554
3555 static const struct acpi_device_id ibm_htk_device_ids[] = {
3556 {TPACPI_ACPI_HKEY_HID, 0},
3557 {"", 0},
3558 };
3559
3560 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3561 .hid = ibm_htk_device_ids,
3562 .notify = hotkey_notify,
3563 .handle = &hkey_handle,
3564 .type = ACPI_DEVICE_NOTIFY,
3565 };
3566
3567 static struct ibm_struct hotkey_driver_data = {
3568 .name = "hotkey",
3569 .read = hotkey_read,
3570 .write = hotkey_write,
3571 .exit = hotkey_exit,
3572 .resume = hotkey_resume,
3573 .suspend = hotkey_suspend,
3574 .acpi = &ibm_hotkey_acpidriver,
3575 };
3576
3577 /*************************************************************************
3578 * Bluetooth subdriver
3579 */
3580
3581 enum {
3582 /* ACPI GBDC/SBDC bits */
3583 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3584 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3585 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3586 off / last state */
3587 };
3588
3589 enum {
3590 /* ACPI \BLTH commands */
3591 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3592 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3593 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3594 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3595 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3596 };
3597
3598 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3599
3600 static void bluetooth_suspend(pm_message_t state)
3601 {
3602 /* Try to make sure radio will resume powered off */
3603 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3604 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3605 vdbg_printk(TPACPI_DBG_RFKILL,
3606 "bluetooth power down on resume request failed\n");
3607 }
3608
3609 static int bluetooth_get_status(void)
3610 {
3611 int status;
3612
3613 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3614 if (dbg_bluetoothemul)
3615 return (tpacpi_bluetooth_emulstate) ?
3616 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3617 #endif
3618
3619 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3620 return -EIO;
3621
3622 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3623 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3624 }
3625
3626 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3627 {
3628 int status;
3629
3630 vdbg_printk(TPACPI_DBG_RFKILL,
3631 "will attempt to %s bluetooth\n",
3632 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3633
3634 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3635 if (dbg_bluetoothemul) {
3636 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3637 return 0;
3638 }
3639 #endif
3640
3641 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3642 if (state == TPACPI_RFK_RADIO_ON)
3643 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3644 else
3645 status = 0;
3646
3647 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3648 return -EIO;
3649
3650 return 0;
3651 }
3652
3653 /* sysfs bluetooth enable ---------------------------------------------- */
3654 static ssize_t bluetooth_enable_show(struct device *dev,
3655 struct device_attribute *attr,
3656 char *buf)
3657 {
3658 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3659 attr, buf);
3660 }
3661
3662 static ssize_t bluetooth_enable_store(struct device *dev,
3663 struct device_attribute *attr,
3664 const char *buf, size_t count)
3665 {
3666 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3667 attr, buf, count);
3668 }
3669
3670 static struct device_attribute dev_attr_bluetooth_enable =
3671 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3672 bluetooth_enable_show, bluetooth_enable_store);
3673
3674 /* --------------------------------------------------------------------- */
3675
3676 static struct attribute *bluetooth_attributes[] = {
3677 &dev_attr_bluetooth_enable.attr,
3678 NULL
3679 };
3680
3681 static const struct attribute_group bluetooth_attr_group = {
3682 .attrs = bluetooth_attributes,
3683 };
3684
3685 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3686 .get_status = bluetooth_get_status,
3687 .set_status = bluetooth_set_status,
3688 };
3689
3690 static void bluetooth_shutdown(void)
3691 {
3692 /* Order firmware to save current state to NVRAM */
3693 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3694 TP_ACPI_BLTH_SAVE_STATE))
3695 printk(TPACPI_NOTICE
3696 "failed to save bluetooth state to NVRAM\n");
3697 else
3698 vdbg_printk(TPACPI_DBG_RFKILL,
3699 "bluestooth state saved to NVRAM\n");
3700 }
3701
3702 static void bluetooth_exit(void)
3703 {
3704 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3705 &bluetooth_attr_group);
3706
3707 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3708
3709 bluetooth_shutdown();
3710 }
3711
3712 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3713 {
3714 int res;
3715 int status = 0;
3716
3717 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3718 "initializing bluetooth subdriver\n");
3719
3720 TPACPI_ACPIHANDLE_INIT(hkey);
3721
3722 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3723 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3724 tp_features.bluetooth = hkey_handle &&
3725 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3726
3727 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3728 "bluetooth is %s, status 0x%02x\n",
3729 str_supported(tp_features.bluetooth),
3730 status);
3731
3732 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3733 if (dbg_bluetoothemul) {
3734 tp_features.bluetooth = 1;
3735 printk(TPACPI_INFO
3736 "bluetooth switch emulation enabled\n");
3737 } else
3738 #endif
3739 if (tp_features.bluetooth &&
3740 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3741 /* no bluetooth hardware present in system */
3742 tp_features.bluetooth = 0;
3743 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3744 "bluetooth hardware not installed\n");
3745 }
3746
3747 if (!tp_features.bluetooth)
3748 return 1;
3749
3750 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3751 &bluetooth_tprfk_ops,
3752 RFKILL_TYPE_BLUETOOTH,
3753 TPACPI_RFK_BLUETOOTH_SW_NAME,
3754 true);
3755 if (res)
3756 return res;
3757
3758 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3759 &bluetooth_attr_group);
3760 if (res) {
3761 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3762 return res;
3763 }
3764
3765 return 0;
3766 }
3767
3768 /* procfs -------------------------------------------------------------- */
3769 static int bluetooth_read(char *p)
3770 {
3771 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3772 }
3773
3774 static int bluetooth_write(char *buf)
3775 {
3776 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3777 }
3778
3779 static struct ibm_struct bluetooth_driver_data = {
3780 .name = "bluetooth",
3781 .read = bluetooth_read,
3782 .write = bluetooth_write,
3783 .exit = bluetooth_exit,
3784 .suspend = bluetooth_suspend,
3785 .shutdown = bluetooth_shutdown,
3786 };
3787
3788 /*************************************************************************
3789 * Wan subdriver
3790 */
3791
3792 enum {
3793 /* ACPI GWAN/SWAN bits */
3794 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3795 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3796 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3797 off / last state */
3798 };
3799
3800 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3801
3802 static void wan_suspend(pm_message_t state)
3803 {
3804 /* Try to make sure radio will resume powered off */
3805 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3806 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3807 vdbg_printk(TPACPI_DBG_RFKILL,
3808 "WWAN power down on resume request failed\n");
3809 }
3810
3811 static int wan_get_status(void)
3812 {
3813 int status;
3814
3815 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3816 if (dbg_wwanemul)
3817 return (tpacpi_wwan_emulstate) ?
3818 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3819 #endif
3820
3821 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3822 return -EIO;
3823
3824 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3825 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3826 }
3827
3828 static int wan_set_status(enum tpacpi_rfkill_state state)
3829 {
3830 int status;
3831
3832 vdbg_printk(TPACPI_DBG_RFKILL,
3833 "will attempt to %s wwan\n",
3834 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3835
3836 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3837 if (dbg_wwanemul) {
3838 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3839 return 0;
3840 }
3841 #endif
3842
3843 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3844 if (state == TPACPI_RFK_RADIO_ON)
3845 status = TP_ACPI_WANCARD_RADIOSSW;
3846 else
3847 status = 0;
3848
3849 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3850 return -EIO;
3851
3852 return 0;
3853 }
3854
3855 /* sysfs wan enable ---------------------------------------------------- */
3856 static ssize_t wan_enable_show(struct device *dev,
3857 struct device_attribute *attr,
3858 char *buf)
3859 {
3860 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3861 attr, buf);
3862 }
3863
3864 static ssize_t wan_enable_store(struct device *dev,
3865 struct device_attribute *attr,
3866 const char *buf, size_t count)
3867 {
3868 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3869 attr, buf, count);
3870 }
3871
3872 static struct device_attribute dev_attr_wan_enable =
3873 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3874 wan_enable_show, wan_enable_store);
3875
3876 /* --------------------------------------------------------------------- */
3877
3878 static struct attribute *wan_attributes[] = {
3879 &dev_attr_wan_enable.attr,
3880 NULL
3881 };
3882
3883 static const struct attribute_group wan_attr_group = {
3884 .attrs = wan_attributes,
3885 };
3886
3887 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3888 .get_status = wan_get_status,
3889 .set_status = wan_set_status,
3890 };
3891
3892 static void wan_shutdown(void)
3893 {
3894 /* Order firmware to save current state to NVRAM */
3895 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3896 TP_ACPI_WGSV_SAVE_STATE))
3897 printk(TPACPI_NOTICE
3898 "failed to save WWAN state to NVRAM\n");
3899 else
3900 vdbg_printk(TPACPI_DBG_RFKILL,
3901 "WWAN state saved to NVRAM\n");
3902 }
3903
3904 static void wan_exit(void)
3905 {
3906 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3907 &wan_attr_group);
3908
3909 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3910
3911 wan_shutdown();
3912 }
3913
3914 static int __init wan_init(struct ibm_init_struct *iibm)
3915 {
3916 int res;
3917 int status = 0;
3918
3919 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3920 "initializing wan subdriver\n");
3921
3922 TPACPI_ACPIHANDLE_INIT(hkey);
3923
3924 tp_features.wan = hkey_handle &&
3925 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3926
3927 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3928 "wan is %s, status 0x%02x\n",
3929 str_supported(tp_features.wan),
3930 status);
3931
3932 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3933 if (dbg_wwanemul) {
3934 tp_features.wan = 1;
3935 printk(TPACPI_INFO
3936 "wwan switch emulation enabled\n");
3937 } else
3938 #endif
3939 if (tp_features.wan &&
3940 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3941 /* no wan hardware present in system */
3942 tp_features.wan = 0;
3943 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3944 "wan hardware not installed\n");
3945 }
3946
3947 if (!tp_features.wan)
3948 return 1;
3949
3950 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3951 &wan_tprfk_ops,
3952 RFKILL_TYPE_WWAN,
3953 TPACPI_RFK_WWAN_SW_NAME,
3954 true);
3955 if (res)
3956 return res;
3957
3958 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3959 &wan_attr_group);
3960
3961 if (res) {
3962 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3963 return res;
3964 }
3965
3966 return 0;
3967 }
3968
3969 /* procfs -------------------------------------------------------------- */
3970 static int wan_read(char *p)
3971 {
3972 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
3973 }
3974
3975 static int wan_write(char *buf)
3976 {
3977 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
3978 }
3979
3980 static struct ibm_struct wan_driver_data = {
3981 .name = "wan",
3982 .read = wan_read,
3983 .write = wan_write,
3984 .exit = wan_exit,
3985 .suspend = wan_suspend,
3986 .shutdown = wan_shutdown,
3987 };
3988
3989 /*************************************************************************
3990 * UWB subdriver
3991 */
3992
3993 enum {
3994 /* ACPI GUWB/SUWB bits */
3995 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3996 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3997 };
3998
3999 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
4000
4001 static int uwb_get_status(void)
4002 {
4003 int status;
4004
4005 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4006 if (dbg_uwbemul)
4007 return (tpacpi_uwb_emulstate) ?
4008 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4009 #endif
4010
4011 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4012 return -EIO;
4013
4014 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4015 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4016 }
4017
4018 static int uwb_set_status(enum tpacpi_rfkill_state state)
4019 {
4020 int status;
4021
4022 vdbg_printk(TPACPI_DBG_RFKILL,
4023 "will attempt to %s UWB\n",
4024 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4025
4026 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4027 if (dbg_uwbemul) {
4028 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4029 return 0;
4030 }
4031 #endif
4032
4033 if (state == TPACPI_RFK_RADIO_ON)
4034 status = TP_ACPI_UWB_RADIOSSW;
4035 else
4036 status = 0;
4037
4038 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4039 return -EIO;
4040
4041 return 0;
4042 }
4043
4044 /* --------------------------------------------------------------------- */
4045
4046 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4047 .get_status = uwb_get_status,
4048 .set_status = uwb_set_status,
4049 };
4050
4051 static void uwb_exit(void)
4052 {
4053 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4054 }
4055
4056 static int __init uwb_init(struct ibm_init_struct *iibm)
4057 {
4058 int res;
4059 int status = 0;
4060
4061 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4062 "initializing uwb subdriver\n");
4063
4064 TPACPI_ACPIHANDLE_INIT(hkey);
4065
4066 tp_features.uwb = hkey_handle &&
4067 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4068
4069 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4070 "uwb is %s, status 0x%02x\n",
4071 str_supported(tp_features.uwb),
4072 status);
4073
4074 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4075 if (dbg_uwbemul) {
4076 tp_features.uwb = 1;
4077 printk(TPACPI_INFO
4078 "uwb switch emulation enabled\n");
4079 } else
4080 #endif
4081 if (tp_features.uwb &&
4082 !(status & TP_ACPI_UWB_HWPRESENT)) {
4083 /* no uwb hardware present in system */
4084 tp_features.uwb = 0;
4085 dbg_printk(TPACPI_DBG_INIT,
4086 "uwb hardware not installed\n");
4087 }
4088
4089 if (!tp_features.uwb)
4090 return 1;
4091
4092 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4093 &uwb_tprfk_ops,
4094 RFKILL_TYPE_UWB,
4095 TPACPI_RFK_UWB_SW_NAME,
4096 false);
4097 return res;
4098 }
4099
4100 static struct ibm_struct uwb_driver_data = {
4101 .name = "uwb",
4102 .exit = uwb_exit,
4103 .flags.experimental = 1,
4104 };
4105
4106 /*************************************************************************
4107 * Video subdriver
4108 */
4109
4110 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4111
4112 enum video_access_mode {
4113 TPACPI_VIDEO_NONE = 0,
4114 TPACPI_VIDEO_570, /* 570 */
4115 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
4116 TPACPI_VIDEO_NEW, /* all others */
4117 };
4118
4119 enum { /* video status flags, based on VIDEO_570 */
4120 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
4121 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
4122 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
4123 };
4124
4125 enum { /* TPACPI_VIDEO_570 constants */
4126 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
4127 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
4128 * video_status_flags */
4129 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
4130 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
4131 };
4132
4133 static enum video_access_mode video_supported;
4134 static int video_orig_autosw;
4135
4136 static int video_autosw_get(void);
4137 static int video_autosw_set(int enable);
4138
4139 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
4140
4141 static int __init video_init(struct ibm_init_struct *iibm)
4142 {
4143 int ivga;
4144
4145 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4146
4147 TPACPI_ACPIHANDLE_INIT(vid);
4148 TPACPI_ACPIHANDLE_INIT(vid2);
4149
4150 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4151 /* G41, assume IVGA doesn't change */
4152 vid_handle = vid2_handle;
4153
4154 if (!vid_handle)
4155 /* video switching not supported on R30, R31 */
4156 video_supported = TPACPI_VIDEO_NONE;
4157 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4158 /* 570 */
4159 video_supported = TPACPI_VIDEO_570;
4160 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4161 /* 600e/x, 770e, 770x */
4162 video_supported = TPACPI_VIDEO_770;
4163 else
4164 /* all others */
4165 video_supported = TPACPI_VIDEO_NEW;
4166
4167 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4168 str_supported(video_supported != TPACPI_VIDEO_NONE),
4169 video_supported);
4170
4171 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4172 }
4173
4174 static void video_exit(void)
4175 {
4176 dbg_printk(TPACPI_DBG_EXIT,
4177 "restoring original video autoswitch mode\n");
4178 if (video_autosw_set(video_orig_autosw))
4179 printk(TPACPI_ERR "error while trying to restore original "
4180 "video autoswitch mode\n");
4181 }
4182
4183 static int video_outputsw_get(void)
4184 {
4185 int status = 0;
4186 int i;
4187
4188 switch (video_supported) {
4189 case TPACPI_VIDEO_570:
4190 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4191 TP_ACPI_VIDEO_570_PHSCMD))
4192 return -EIO;
4193 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4194 break;
4195 case TPACPI_VIDEO_770:
4196 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4197 return -EIO;
4198 if (i)
4199 status |= TP_ACPI_VIDEO_S_LCD;
4200 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4201 return -EIO;
4202 if (i)
4203 status |= TP_ACPI_VIDEO_S_CRT;
4204 break;
4205 case TPACPI_VIDEO_NEW:
4206 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4207 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4208 return -EIO;
4209 if (i)
4210 status |= TP_ACPI_VIDEO_S_CRT;
4211
4212 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4213 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4214 return -EIO;
4215 if (i)
4216 status |= TP_ACPI_VIDEO_S_LCD;
4217 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4218 return -EIO;
4219 if (i)
4220 status |= TP_ACPI_VIDEO_S_DVI;
4221 break;
4222 default:
4223 return -ENOSYS;
4224 }
4225
4226 return status;
4227 }
4228
4229 static int video_outputsw_set(int status)
4230 {
4231 int autosw;
4232 int res = 0;
4233
4234 switch (video_supported) {
4235 case TPACPI_VIDEO_570:
4236 res = acpi_evalf(NULL, NULL,
4237 "\\_SB.PHS2", "vdd",
4238 TP_ACPI_VIDEO_570_PHS2CMD,
4239 status | TP_ACPI_VIDEO_570_PHS2SET);
4240 break;
4241 case TPACPI_VIDEO_770:
4242 autosw = video_autosw_get();
4243 if (autosw < 0)
4244 return autosw;
4245
4246 res = video_autosw_set(1);
4247 if (res)
4248 return res;
4249 res = acpi_evalf(vid_handle, NULL,
4250 "ASWT", "vdd", status * 0x100, 0);
4251 if (!autosw && video_autosw_set(autosw)) {
4252 printk(TPACPI_ERR
4253 "video auto-switch left enabled due to error\n");
4254 return -EIO;
4255 }
4256 break;
4257 case TPACPI_VIDEO_NEW:
4258 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4259 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4260 break;
4261 default:
4262 return -ENOSYS;
4263 }
4264
4265 return (res)? 0 : -EIO;
4266 }
4267
4268 static int video_autosw_get(void)
4269 {
4270 int autosw = 0;
4271
4272 switch (video_supported) {
4273 case TPACPI_VIDEO_570:
4274 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4275 return -EIO;
4276 break;
4277 case TPACPI_VIDEO_770:
4278 case TPACPI_VIDEO_NEW:
4279 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4280 return -EIO;
4281 break;
4282 default:
4283 return -ENOSYS;
4284 }
4285
4286 return autosw & 1;
4287 }
4288
4289 static int video_autosw_set(int enable)
4290 {
4291 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4292 return -EIO;
4293 return 0;
4294 }
4295
4296 static int video_outputsw_cycle(void)
4297 {
4298 int autosw = video_autosw_get();
4299 int res;
4300
4301 if (autosw < 0)
4302 return autosw;
4303
4304 switch (video_supported) {
4305 case TPACPI_VIDEO_570:
4306 res = video_autosw_set(1);
4307 if (res)
4308 return res;
4309 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4310 break;
4311 case TPACPI_VIDEO_770:
4312 case TPACPI_VIDEO_NEW:
4313 res = video_autosw_set(1);
4314 if (res)
4315 return res;
4316 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4317 break;
4318 default:
4319 return -ENOSYS;
4320 }
4321 if (!autosw && video_autosw_set(autosw)) {
4322 printk(TPACPI_ERR
4323 "video auto-switch left enabled due to error\n");
4324 return -EIO;
4325 }
4326
4327 return (res)? 0 : -EIO;
4328 }
4329
4330 static int video_expand_toggle(void)
4331 {
4332 switch (video_supported) {
4333 case TPACPI_VIDEO_570:
4334 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4335 0 : -EIO;
4336 case TPACPI_VIDEO_770:
4337 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4338 0 : -EIO;
4339 case TPACPI_VIDEO_NEW:
4340 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4341 0 : -EIO;
4342 default:
4343 return -ENOSYS;
4344 }
4345 /* not reached */
4346 }
4347
4348 static int video_read(char *p)
4349 {
4350 int status, autosw;
4351 int len = 0;
4352
4353 if (video_supported == TPACPI_VIDEO_NONE) {
4354 len += sprintf(p + len, "status:\t\tnot supported\n");
4355 return len;
4356 }
4357
4358 status = video_outputsw_get();
4359 if (status < 0)
4360 return status;
4361
4362 autosw = video_autosw_get();
4363 if (autosw < 0)
4364 return autosw;
4365
4366 len += sprintf(p + len, "status:\t\tsupported\n");
4367 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4368 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4369 if (video_supported == TPACPI_VIDEO_NEW)
4370 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4371 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4372 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4373 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4374 if (video_supported == TPACPI_VIDEO_NEW)
4375 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4376 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4377 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4378
4379 return len;
4380 }
4381
4382 static int video_write(char *buf)
4383 {
4384 char *cmd;
4385 int enable, disable, status;
4386 int res;
4387
4388 if (video_supported == TPACPI_VIDEO_NONE)
4389 return -ENODEV;
4390
4391 enable = 0;
4392 disable = 0;
4393
4394 while ((cmd = next_cmd(&buf))) {
4395 if (strlencmp(cmd, "lcd_enable") == 0) {
4396 enable |= TP_ACPI_VIDEO_S_LCD;
4397 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4398 disable |= TP_ACPI_VIDEO_S_LCD;
4399 } else if (strlencmp(cmd, "crt_enable") == 0) {
4400 enable |= TP_ACPI_VIDEO_S_CRT;
4401 } else if (strlencmp(cmd, "crt_disable") == 0) {
4402 disable |= TP_ACPI_VIDEO_S_CRT;
4403 } else if (video_supported == TPACPI_VIDEO_NEW &&
4404 strlencmp(cmd, "dvi_enable") == 0) {
4405 enable |= TP_ACPI_VIDEO_S_DVI;
4406 } else if (video_supported == TPACPI_VIDEO_NEW &&
4407 strlencmp(cmd, "dvi_disable") == 0) {
4408 disable |= TP_ACPI_VIDEO_S_DVI;
4409 } else if (strlencmp(cmd, "auto_enable") == 0) {
4410 res = video_autosw_set(1);
4411 if (res)
4412 return res;
4413 } else if (strlencmp(cmd, "auto_disable") == 0) {
4414 res = video_autosw_set(0);
4415 if (res)
4416 return res;
4417 } else if (strlencmp(cmd, "video_switch") == 0) {
4418 res = video_outputsw_cycle();
4419 if (res)
4420 return res;
4421 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4422 res = video_expand_toggle();
4423 if (res)
4424 return res;
4425 } else
4426 return -EINVAL;
4427 }
4428
4429 if (enable || disable) {
4430 status = video_outputsw_get();
4431 if (status < 0)
4432 return status;
4433 res = video_outputsw_set((status & ~disable) | enable);
4434 if (res)
4435 return res;
4436 }
4437
4438 return 0;
4439 }
4440
4441 static struct ibm_struct video_driver_data = {
4442 .name = "video",
4443 .read = video_read,
4444 .write = video_write,
4445 .exit = video_exit,
4446 };
4447
4448 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4449
4450 /*************************************************************************
4451 * Light (thinklight) subdriver
4452 */
4453
4454 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4455 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4456
4457 static int light_get_status(void)
4458 {
4459 int status = 0;
4460
4461 if (tp_features.light_status) {
4462 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4463 return -EIO;
4464 return (!!status);
4465 }
4466
4467 return -ENXIO;
4468 }
4469
4470 static int light_set_status(int status)
4471 {
4472 int rc;
4473
4474 if (tp_features.light) {
4475 if (cmos_handle) {
4476 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4477 (status)?
4478 TP_CMOS_THINKLIGHT_ON :
4479 TP_CMOS_THINKLIGHT_OFF);
4480 } else {
4481 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4482 (status)? 1 : 0);
4483 }
4484 return (rc)? 0 : -EIO;
4485 }
4486
4487 return -ENXIO;
4488 }
4489
4490 static void light_set_status_worker(struct work_struct *work)
4491 {
4492 struct tpacpi_led_classdev *data =
4493 container_of(work, struct tpacpi_led_classdev, work);
4494
4495 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4496 light_set_status((data->new_state != TPACPI_LED_OFF));
4497 }
4498
4499 static void light_sysfs_set(struct led_classdev *led_cdev,
4500 enum led_brightness brightness)
4501 {
4502 struct tpacpi_led_classdev *data =
4503 container_of(led_cdev,
4504 struct tpacpi_led_classdev,
4505 led_classdev);
4506 data->new_state = (brightness != LED_OFF) ?
4507 TPACPI_LED_ON : TPACPI_LED_OFF;
4508 queue_work(tpacpi_wq, &data->work);
4509 }
4510
4511 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4512 {
4513 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4514 }
4515
4516 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4517 .led_classdev = {
4518 .name = "tpacpi::thinklight",
4519 .brightness_set = &light_sysfs_set,
4520 .brightness_get = &light_sysfs_get,
4521 }
4522 };
4523
4524 static int __init light_init(struct ibm_init_struct *iibm)
4525 {
4526 int rc;
4527
4528 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4529
4530 TPACPI_ACPIHANDLE_INIT(ledb);
4531 TPACPI_ACPIHANDLE_INIT(lght);
4532 TPACPI_ACPIHANDLE_INIT(cmos);
4533 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4534
4535 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4536 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4537
4538 if (tp_features.light)
4539 /* light status not supported on
4540 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4541 tp_features.light_status =
4542 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4543
4544 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4545 str_supported(tp_features.light),
4546 str_supported(tp_features.light_status));
4547
4548 if (!tp_features.light)
4549 return 1;
4550
4551 rc = led_classdev_register(&tpacpi_pdev->dev,
4552 &tpacpi_led_thinklight.led_classdev);
4553
4554 if (rc < 0) {
4555 tp_features.light = 0;
4556 tp_features.light_status = 0;
4557 } else {
4558 rc = 0;
4559 }
4560
4561 return rc;
4562 }
4563
4564 static void light_exit(void)
4565 {
4566 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4567 if (work_pending(&tpacpi_led_thinklight.work))
4568 flush_workqueue(tpacpi_wq);
4569 }
4570
4571 static int light_read(char *p)
4572 {
4573 int len = 0;
4574 int status;
4575
4576 if (!tp_features.light) {
4577 len += sprintf(p + len, "status:\t\tnot supported\n");
4578 } else if (!tp_features.light_status) {
4579 len += sprintf(p + len, "status:\t\tunknown\n");
4580 len += sprintf(p + len, "commands:\ton, off\n");
4581 } else {
4582 status = light_get_status();
4583 if (status < 0)
4584 return status;
4585 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4586 len += sprintf(p + len, "commands:\ton, off\n");
4587 }
4588
4589 return len;
4590 }
4591
4592 static int light_write(char *buf)
4593 {
4594 char *cmd;
4595 int newstatus = 0;
4596
4597 if (!tp_features.light)
4598 return -ENODEV;
4599
4600 while ((cmd = next_cmd(&buf))) {
4601 if (strlencmp(cmd, "on") == 0) {
4602 newstatus = 1;
4603 } else if (strlencmp(cmd, "off") == 0) {
4604 newstatus = 0;
4605 } else
4606 return -EINVAL;
4607 }
4608
4609 return light_set_status(newstatus);
4610 }
4611
4612 static struct ibm_struct light_driver_data = {
4613 .name = "light",
4614 .read = light_read,
4615 .write = light_write,
4616 .exit = light_exit,
4617 };
4618
4619 /*************************************************************************
4620 * CMOS subdriver
4621 */
4622
4623 /* sysfs cmos_command -------------------------------------------------- */
4624 static ssize_t cmos_command_store(struct device *dev,
4625 struct device_attribute *attr,
4626 const char *buf, size_t count)
4627 {
4628 unsigned long cmos_cmd;
4629 int res;
4630
4631 if (parse_strtoul(buf, 21, &cmos_cmd))
4632 return -EINVAL;
4633
4634 res = issue_thinkpad_cmos_command(cmos_cmd);
4635 return (res)? res : count;
4636 }
4637
4638 static struct device_attribute dev_attr_cmos_command =
4639 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4640
4641 /* --------------------------------------------------------------------- */
4642
4643 static int __init cmos_init(struct ibm_init_struct *iibm)
4644 {
4645 int res;
4646
4647 vdbg_printk(TPACPI_DBG_INIT,
4648 "initializing cmos commands subdriver\n");
4649
4650 TPACPI_ACPIHANDLE_INIT(cmos);
4651
4652 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4653 str_supported(cmos_handle != NULL));
4654
4655 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4656 if (res)
4657 return res;
4658
4659 return (cmos_handle)? 0 : 1;
4660 }
4661
4662 static void cmos_exit(void)
4663 {
4664 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4665 }
4666
4667 static int cmos_read(char *p)
4668 {
4669 int len = 0;
4670
4671 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4672 R30, R31, T20-22, X20-21 */
4673 if (!cmos_handle)
4674 len += sprintf(p + len, "status:\t\tnot supported\n");
4675 else {
4676 len += sprintf(p + len, "status:\t\tsupported\n");
4677 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4678 }
4679
4680 return len;
4681 }
4682
4683 static int cmos_write(char *buf)
4684 {
4685 char *cmd;
4686 int cmos_cmd, res;
4687
4688 while ((cmd = next_cmd(&buf))) {
4689 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4690 cmos_cmd >= 0 && cmos_cmd <= 21) {
4691 /* cmos_cmd set */
4692 } else
4693 return -EINVAL;
4694
4695 res = issue_thinkpad_cmos_command(cmos_cmd);
4696 if (res)
4697 return res;
4698 }
4699
4700 return 0;
4701 }
4702
4703 static struct ibm_struct cmos_driver_data = {
4704 .name = "cmos",
4705 .read = cmos_read,
4706 .write = cmos_write,
4707 .exit = cmos_exit,
4708 };
4709
4710 /*************************************************************************
4711 * LED subdriver
4712 */
4713
4714 enum led_access_mode {
4715 TPACPI_LED_NONE = 0,
4716 TPACPI_LED_570, /* 570 */
4717 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4718 TPACPI_LED_NEW, /* all others */
4719 };
4720
4721 enum { /* For TPACPI_LED_OLD */
4722 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4723 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4724 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4725 };
4726
4727 static enum led_access_mode led_supported;
4728
4729 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4730 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4731 /* T20-22, X20-21 */
4732 "LED", /* all others */
4733 ); /* R30, R31 */
4734
4735 #define TPACPI_LED_NUMLEDS 16
4736 static struct tpacpi_led_classdev *tpacpi_leds;
4737 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4738 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4739 /* there's a limit of 19 chars + NULL before 2.6.26 */
4740 "tpacpi::power",
4741 "tpacpi:orange:batt",
4742 "tpacpi:green:batt",
4743 "tpacpi::dock_active",
4744 "tpacpi::bay_active",
4745 "tpacpi::dock_batt",
4746 "tpacpi::unknown_led",
4747 "tpacpi::standby",
4748 "tpacpi::dock_status1",
4749 "tpacpi::dock_status2",
4750 "tpacpi::unknown_led2",
4751 "tpacpi::unknown_led3",
4752 "tpacpi::thinkvantage",
4753 };
4754 #define TPACPI_SAFE_LEDS 0x1081U
4755
4756 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4757 {
4758 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4759 return false;
4760 #else
4761 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4762 #endif
4763 }
4764
4765 static int led_get_status(const unsigned int led)
4766 {
4767 int status;
4768 enum led_status_t led_s;
4769
4770 switch (led_supported) {
4771 case TPACPI_LED_570:
4772 if (!acpi_evalf(ec_handle,
4773 &status, "GLED", "dd", 1 << led))
4774 return -EIO;
4775 led_s = (status == 0)?
4776 TPACPI_LED_OFF :
4777 ((status == 1)?
4778 TPACPI_LED_ON :
4779 TPACPI_LED_BLINK);
4780 tpacpi_led_state_cache[led] = led_s;
4781 return led_s;
4782 default:
4783 return -ENXIO;
4784 }
4785
4786 /* not reached */
4787 }
4788
4789 static int led_set_status(const unsigned int led,
4790 const enum led_status_t ledstatus)
4791 {
4792 /* off, on, blink. Index is led_status_t */
4793 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4794 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4795
4796 int rc = 0;
4797
4798 switch (led_supported) {
4799 case TPACPI_LED_570:
4800 /* 570 */
4801 if (unlikely(led > 7))
4802 return -EINVAL;
4803 if (unlikely(tpacpi_is_led_restricted(led)))
4804 return -EPERM;
4805 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4806 (1 << led), led_sled_arg1[ledstatus]))
4807 rc = -EIO;
4808 break;
4809 case TPACPI_LED_OLD:
4810 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4811 if (unlikely(led > 7))
4812 return -EINVAL;
4813 if (unlikely(tpacpi_is_led_restricted(led)))
4814 return -EPERM;
4815 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4816 if (rc >= 0)
4817 rc = ec_write(TPACPI_LED_EC_HLBL,
4818 (ledstatus == TPACPI_LED_BLINK) << led);
4819 if (rc >= 0)
4820 rc = ec_write(TPACPI_LED_EC_HLCL,
4821 (ledstatus != TPACPI_LED_OFF) << led);
4822 break;
4823 case TPACPI_LED_NEW:
4824 /* all others */
4825 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4826 return -EINVAL;
4827 if (unlikely(tpacpi_is_led_restricted(led)))
4828 return -EPERM;
4829 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4830 led, led_led_arg1[ledstatus]))
4831 rc = -EIO;
4832 break;
4833 default:
4834 rc = -ENXIO;
4835 }
4836
4837 if (!rc)
4838 tpacpi_led_state_cache[led] = ledstatus;
4839
4840 return rc;
4841 }
4842
4843 static void led_set_status_worker(struct work_struct *work)
4844 {
4845 struct tpacpi_led_classdev *data =
4846 container_of(work, struct tpacpi_led_classdev, work);
4847
4848 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4849 led_set_status(data->led, data->new_state);
4850 }
4851
4852 static void led_sysfs_set(struct led_classdev *led_cdev,
4853 enum led_brightness brightness)
4854 {
4855 struct tpacpi_led_classdev *data = container_of(led_cdev,
4856 struct tpacpi_led_classdev, led_classdev);
4857
4858 if (brightness == LED_OFF)
4859 data->new_state = TPACPI_LED_OFF;
4860 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4861 data->new_state = TPACPI_LED_ON;
4862 else
4863 data->new_state = TPACPI_LED_BLINK;
4864
4865 queue_work(tpacpi_wq, &data->work);
4866 }
4867
4868 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4869 unsigned long *delay_on, unsigned long *delay_off)
4870 {
4871 struct tpacpi_led_classdev *data = container_of(led_cdev,
4872 struct tpacpi_led_classdev, led_classdev);
4873
4874 /* Can we choose the flash rate? */
4875 if (*delay_on == 0 && *delay_off == 0) {
4876 /* yes. set them to the hardware blink rate (1 Hz) */
4877 *delay_on = 500; /* ms */
4878 *delay_off = 500; /* ms */
4879 } else if ((*delay_on != 500) || (*delay_off != 500))
4880 return -EINVAL;
4881
4882 data->new_state = TPACPI_LED_BLINK;
4883 queue_work(tpacpi_wq, &data->work);
4884
4885 return 0;
4886 }
4887
4888 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4889 {
4890 int rc;
4891
4892 struct tpacpi_led_classdev *data = container_of(led_cdev,
4893 struct tpacpi_led_classdev, led_classdev);
4894
4895 rc = led_get_status(data->led);
4896
4897 if (rc == TPACPI_LED_OFF || rc < 0)
4898 rc = LED_OFF; /* no error handling in led class :( */
4899 else
4900 rc = LED_FULL;
4901
4902 return rc;
4903 }
4904
4905 static void led_exit(void)
4906 {
4907 unsigned int i;
4908
4909 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4910 if (tpacpi_leds[i].led_classdev.name)
4911 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4912 }
4913
4914 kfree(tpacpi_leds);
4915 }
4916
4917 static int __init tpacpi_init_led(unsigned int led)
4918 {
4919 int rc;
4920
4921 tpacpi_leds[led].led = led;
4922
4923 /* LEDs with no name don't get registered */
4924 if (!tpacpi_led_names[led])
4925 return 0;
4926
4927 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4928 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4929 if (led_supported == TPACPI_LED_570)
4930 tpacpi_leds[led].led_classdev.brightness_get =
4931 &led_sysfs_get;
4932
4933 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4934
4935 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4936
4937 rc = led_classdev_register(&tpacpi_pdev->dev,
4938 &tpacpi_leds[led].led_classdev);
4939 if (rc < 0)
4940 tpacpi_leds[led].led_classdev.name = NULL;
4941
4942 return rc;
4943 }
4944
4945 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
4946 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
4947 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
4948 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
4949
4950 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
4951 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
4952 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
4953 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
4954 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
4955 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
4956 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
4957 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
4958
4959 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
4960 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
4961 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
4962 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
4963 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
4964
4965 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
4966 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
4967 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
4968 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
4969
4970 /* (1) - may have excess leds enabled on MSB */
4971
4972 /* Defaults (order matters, keep last, don't reorder!) */
4973 { /* Lenovo */
4974 .vendor = PCI_VENDOR_ID_LENOVO,
4975 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
4976 .quirks = 0x1fffU,
4977 },
4978 { /* IBM ThinkPads with no EC version string */
4979 .vendor = PCI_VENDOR_ID_IBM,
4980 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
4981 .quirks = 0x00ffU,
4982 },
4983 { /* IBM ThinkPads with EC version string */
4984 .vendor = PCI_VENDOR_ID_IBM,
4985 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
4986 .quirks = 0x00bfU,
4987 },
4988 };
4989
4990 #undef TPACPI_LEDQ_IBM
4991 #undef TPACPI_LEDQ_LNV
4992
4993 static int __init led_init(struct ibm_init_struct *iibm)
4994 {
4995 unsigned int i;
4996 int rc;
4997 unsigned long useful_leds;
4998
4999 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5000
5001 TPACPI_ACPIHANDLE_INIT(led);
5002
5003 if (!led_handle)
5004 /* led not supported on R30, R31 */
5005 led_supported = TPACPI_LED_NONE;
5006 else if (strlencmp(led_path, "SLED") == 0)
5007 /* 570 */
5008 led_supported = TPACPI_LED_570;
5009 else if (strlencmp(led_path, "SYSL") == 0)
5010 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5011 led_supported = TPACPI_LED_OLD;
5012 else
5013 /* all others */
5014 led_supported = TPACPI_LED_NEW;
5015
5016 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5017 str_supported(led_supported), led_supported);
5018
5019 if (led_supported == TPACPI_LED_NONE)
5020 return 1;
5021
5022 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5023 GFP_KERNEL);
5024 if (!tpacpi_leds) {
5025 printk(TPACPI_ERR "Out of memory for LED data\n");
5026 return -ENOMEM;
5027 }
5028
5029 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5030 ARRAY_SIZE(led_useful_qtable));
5031
5032 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5033 if (!tpacpi_is_led_restricted(i) &&
5034 test_bit(i, &useful_leds)) {
5035 rc = tpacpi_init_led(i);
5036 if (rc < 0) {
5037 led_exit();
5038 return rc;
5039 }
5040 }
5041 }
5042
5043 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5044 printk(TPACPI_NOTICE
5045 "warning: userspace override of important "
5046 "firmware LEDs is enabled\n");
5047 #endif
5048 return 0;
5049 }
5050
5051 #define str_led_status(s) \
5052 ((s) == TPACPI_LED_OFF ? "off" : \
5053 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5054
5055 static int led_read(char *p)
5056 {
5057 int len = 0;
5058
5059 if (!led_supported) {
5060 len += sprintf(p + len, "status:\t\tnot supported\n");
5061 return len;
5062 }
5063 len += sprintf(p + len, "status:\t\tsupported\n");
5064
5065 if (led_supported == TPACPI_LED_570) {
5066 /* 570 */
5067 int i, status;
5068 for (i = 0; i < 8; i++) {
5069 status = led_get_status(i);
5070 if (status < 0)
5071 return -EIO;
5072 len += sprintf(p + len, "%d:\t\t%s\n",
5073 i, str_led_status(status));
5074 }
5075 }
5076
5077 len += sprintf(p + len, "commands:\t"
5078 "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5079
5080 return len;
5081 }
5082
5083 static int led_write(char *buf)
5084 {
5085 char *cmd;
5086 int led, rc;
5087 enum led_status_t s;
5088
5089 if (!led_supported)
5090 return -ENODEV;
5091
5092 while ((cmd = next_cmd(&buf))) {
5093 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5094 return -EINVAL;
5095
5096 if (strstr(cmd, "off")) {
5097 s = TPACPI_LED_OFF;
5098 } else if (strstr(cmd, "on")) {
5099 s = TPACPI_LED_ON;
5100 } else if (strstr(cmd, "blink")) {
5101 s = TPACPI_LED_BLINK;
5102 } else {
5103 return -EINVAL;
5104 }
5105
5106 rc = led_set_status(led, s);
5107 if (rc < 0)
5108 return rc;
5109 }
5110
5111 return 0;
5112 }
5113
5114 static struct ibm_struct led_driver_data = {
5115 .name = "led",
5116 .read = led_read,
5117 .write = led_write,
5118 .exit = led_exit,
5119 };
5120
5121 /*************************************************************************
5122 * Beep subdriver
5123 */
5124
5125 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5126
5127 #define TPACPI_BEEP_Q1 0x0001
5128
5129 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5130 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5131 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5132 };
5133
5134 static int __init beep_init(struct ibm_init_struct *iibm)
5135 {
5136 unsigned long quirks;
5137
5138 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5139
5140 TPACPI_ACPIHANDLE_INIT(beep);
5141
5142 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5143 str_supported(beep_handle != NULL));
5144
5145 quirks = tpacpi_check_quirks(beep_quirk_table,
5146 ARRAY_SIZE(beep_quirk_table));
5147
5148 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5149
5150 return (beep_handle)? 0 : 1;
5151 }
5152
5153 static int beep_read(char *p)
5154 {
5155 int len = 0;
5156
5157 if (!beep_handle)
5158 len += sprintf(p + len, "status:\t\tnot supported\n");
5159 else {
5160 len += sprintf(p + len, "status:\t\tsupported\n");
5161 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5162 }
5163
5164 return len;
5165 }
5166
5167 static int beep_write(char *buf)
5168 {
5169 char *cmd;
5170 int beep_cmd;
5171
5172 if (!beep_handle)
5173 return -ENODEV;
5174
5175 while ((cmd = next_cmd(&buf))) {
5176 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5177 beep_cmd >= 0 && beep_cmd <= 17) {
5178 /* beep_cmd set */
5179 } else
5180 return -EINVAL;
5181 if (tp_features.beep_needs_two_args) {
5182 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5183 beep_cmd, 0))
5184 return -EIO;
5185 } else {
5186 if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5187 beep_cmd))
5188 return -EIO;
5189 }
5190 }
5191
5192 return 0;
5193 }
5194
5195 static struct ibm_struct beep_driver_data = {
5196 .name = "beep",
5197 .read = beep_read,
5198 .write = beep_write,
5199 };
5200
5201 /*************************************************************************
5202 * Thermal subdriver
5203 */
5204
5205 enum thermal_access_mode {
5206 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5207 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5208 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5209 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5210 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5211 };
5212
5213 enum { /* TPACPI_THERMAL_TPEC_* */
5214 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5215 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5216 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5217 };
5218
5219 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5220 struct ibm_thermal_sensors_struct {
5221 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5222 };
5223
5224 static enum thermal_access_mode thermal_read_mode;
5225
5226 /* idx is zero-based */
5227 static int thermal_get_sensor(int idx, s32 *value)
5228 {
5229 int t;
5230 s8 tmp;
5231 char tmpi[5];
5232
5233 t = TP_EC_THERMAL_TMP0;
5234
5235 switch (thermal_read_mode) {
5236 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5237 case TPACPI_THERMAL_TPEC_16:
5238 if (idx >= 8 && idx <= 15) {
5239 t = TP_EC_THERMAL_TMP8;
5240 idx -= 8;
5241 }
5242 /* fallthrough */
5243 #endif
5244 case TPACPI_THERMAL_TPEC_8:
5245 if (idx <= 7) {
5246 if (!acpi_ec_read(t + idx, &tmp))
5247 return -EIO;
5248 *value = tmp * 1000;
5249 return 0;
5250 }
5251 break;
5252
5253 case TPACPI_THERMAL_ACPI_UPDT:
5254 if (idx <= 7) {
5255 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5256 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5257 return -EIO;
5258 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5259 return -EIO;
5260 *value = (t - 2732) * 100;
5261 return 0;
5262 }
5263 break;
5264
5265 case TPACPI_THERMAL_ACPI_TMP07:
5266 if (idx <= 7) {
5267 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5268 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5269 return -EIO;
5270 if (t > 127 || t < -127)
5271 t = TP_EC_THERMAL_TMP_NA;
5272 *value = t * 1000;
5273 return 0;
5274 }
5275 break;
5276
5277 case TPACPI_THERMAL_NONE:
5278 default:
5279 return -ENOSYS;
5280 }
5281
5282 return -EINVAL;
5283 }
5284
5285 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5286 {
5287 int res, i;
5288 int n;
5289
5290 n = 8;
5291 i = 0;
5292
5293 if (!s)
5294 return -EINVAL;
5295
5296 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5297 n = 16;
5298
5299 for (i = 0 ; i < n; i++) {
5300 res = thermal_get_sensor(i, &s->temp[i]);
5301 if (res)
5302 return res;
5303 }
5304
5305 return n;
5306 }
5307
5308 /* sysfs temp##_input -------------------------------------------------- */
5309
5310 static ssize_t thermal_temp_input_show(struct device *dev,
5311 struct device_attribute *attr,
5312 char *buf)
5313 {
5314 struct sensor_device_attribute *sensor_attr =
5315 to_sensor_dev_attr(attr);
5316 int idx = sensor_attr->index;
5317 s32 value;
5318 int res;
5319
5320 res = thermal_get_sensor(idx, &value);
5321 if (res)
5322 return res;
5323 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5324 return -ENXIO;
5325
5326 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5327 }
5328
5329 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5330 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5331 thermal_temp_input_show, NULL, _idxB)
5332
5333 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5334 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5335 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5336 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5337 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5338 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5339 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5340 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5341 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5342 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5343 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5344 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5345 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5346 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5347 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5348 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5349 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5350 };
5351
5352 #define THERMAL_ATTRS(X) \
5353 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5354
5355 static struct attribute *thermal_temp_input_attr[] = {
5356 THERMAL_ATTRS(8),
5357 THERMAL_ATTRS(9),
5358 THERMAL_ATTRS(10),
5359 THERMAL_ATTRS(11),
5360 THERMAL_ATTRS(12),
5361 THERMAL_ATTRS(13),
5362 THERMAL_ATTRS(14),
5363 THERMAL_ATTRS(15),
5364 THERMAL_ATTRS(0),
5365 THERMAL_ATTRS(1),
5366 THERMAL_ATTRS(2),
5367 THERMAL_ATTRS(3),
5368 THERMAL_ATTRS(4),
5369 THERMAL_ATTRS(5),
5370 THERMAL_ATTRS(6),
5371 THERMAL_ATTRS(7),
5372 NULL
5373 };
5374
5375 static const struct attribute_group thermal_temp_input16_group = {
5376 .attrs = thermal_temp_input_attr
5377 };
5378
5379 static const struct attribute_group thermal_temp_input8_group = {
5380 .attrs = &thermal_temp_input_attr[8]
5381 };
5382
5383 #undef THERMAL_SENSOR_ATTR_TEMP
5384 #undef THERMAL_ATTRS
5385
5386 /* --------------------------------------------------------------------- */
5387
5388 static int __init thermal_init(struct ibm_init_struct *iibm)
5389 {
5390 u8 t, ta1, ta2;
5391 int i;
5392 int acpi_tmp7;
5393 int res;
5394
5395 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5396
5397 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5398
5399 if (thinkpad_id.ec_model) {
5400 /*
5401 * Direct EC access mode: sensors at registers
5402 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5403 * non-implemented, thermal sensors return 0x80 when
5404 * not available
5405 */
5406
5407 ta1 = ta2 = 0;
5408 for (i = 0; i < 8; i++) {
5409 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5410 ta1 |= t;
5411 } else {
5412 ta1 = 0;
5413 break;
5414 }
5415 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5416 ta2 |= t;
5417 } else {
5418 ta1 = 0;
5419 break;
5420 }
5421 }
5422 if (ta1 == 0) {
5423 /* This is sheer paranoia, but we handle it anyway */
5424 if (acpi_tmp7) {
5425 printk(TPACPI_ERR
5426 "ThinkPad ACPI EC access misbehaving, "
5427 "falling back to ACPI TMPx access "
5428 "mode\n");
5429 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5430 } else {
5431 printk(TPACPI_ERR
5432 "ThinkPad ACPI EC access misbehaving, "
5433 "disabling thermal sensors access\n");
5434 thermal_read_mode = TPACPI_THERMAL_NONE;
5435 }
5436 } else {
5437 thermal_read_mode =
5438 (ta2 != 0) ?
5439 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5440 }
5441 } else if (acpi_tmp7) {
5442 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5443 /* 600e/x, 770e, 770x */
5444 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5445 } else {
5446 /* Standard ACPI TMPx access, max 8 sensors */
5447 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5448 }
5449 } else {
5450 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5451 thermal_read_mode = TPACPI_THERMAL_NONE;
5452 }
5453
5454 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5455 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5456 thermal_read_mode);
5457
5458 switch (thermal_read_mode) {
5459 case TPACPI_THERMAL_TPEC_16:
5460 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5461 &thermal_temp_input16_group);
5462 if (res)
5463 return res;
5464 break;
5465 case TPACPI_THERMAL_TPEC_8:
5466 case TPACPI_THERMAL_ACPI_TMP07:
5467 case TPACPI_THERMAL_ACPI_UPDT:
5468 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5469 &thermal_temp_input8_group);
5470 if (res)
5471 return res;
5472 break;
5473 case TPACPI_THERMAL_NONE:
5474 default:
5475 return 1;
5476 }
5477
5478 return 0;
5479 }
5480
5481 static void thermal_exit(void)
5482 {
5483 switch (thermal_read_mode) {
5484 case TPACPI_THERMAL_TPEC_16:
5485 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5486 &thermal_temp_input16_group);
5487 break;
5488 case TPACPI_THERMAL_TPEC_8:
5489 case TPACPI_THERMAL_ACPI_TMP07:
5490 case TPACPI_THERMAL_ACPI_UPDT:
5491 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5492 &thermal_temp_input16_group);
5493 break;
5494 case TPACPI_THERMAL_NONE:
5495 default:
5496 break;
5497 }
5498 }
5499
5500 static int thermal_read(char *p)
5501 {
5502 int len = 0;
5503 int n, i;
5504 struct ibm_thermal_sensors_struct t;
5505
5506 n = thermal_get_sensors(&t);
5507 if (unlikely(n < 0))
5508 return n;
5509
5510 len += sprintf(p + len, "temperatures:\t");
5511
5512 if (n > 0) {
5513 for (i = 0; i < (n - 1); i++)
5514 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5515 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5516 } else
5517 len += sprintf(p + len, "not supported\n");
5518
5519 return len;
5520 }
5521
5522 static struct ibm_struct thermal_driver_data = {
5523 .name = "thermal",
5524 .read = thermal_read,
5525 .exit = thermal_exit,
5526 };
5527
5528 /*************************************************************************
5529 * EC Dump subdriver
5530 */
5531
5532 static u8 ecdump_regs[256];
5533
5534 static int ecdump_read(char *p)
5535 {
5536 int len = 0;
5537 int i, j;
5538 u8 v;
5539
5540 len += sprintf(p + len, "EC "
5541 " +00 +01 +02 +03 +04 +05 +06 +07"
5542 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5543 for (i = 0; i < 256; i += 16) {
5544 len += sprintf(p + len, "EC 0x%02x:", i);
5545 for (j = 0; j < 16; j++) {
5546 if (!acpi_ec_read(i + j, &v))
5547 break;
5548 if (v != ecdump_regs[i + j])
5549 len += sprintf(p + len, " *%02x", v);
5550 else
5551 len += sprintf(p + len, " %02x", v);
5552 ecdump_regs[i + j] = v;
5553 }
5554 len += sprintf(p + len, "\n");
5555 if (j != 16)
5556 break;
5557 }
5558
5559 /* These are way too dangerous to advertise openly... */
5560 #if 0
5561 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5562 " (<offset> is 00-ff, <value> is 00-ff)\n");
5563 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5564 " (<offset> is 00-ff, <value> is 0-255)\n");
5565 #endif
5566 return len;
5567 }
5568
5569 static int ecdump_write(char *buf)
5570 {
5571 char *cmd;
5572 int i, v;
5573
5574 while ((cmd = next_cmd(&buf))) {
5575 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5576 /* i and v set */
5577 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5578 /* i and v set */
5579 } else
5580 return -EINVAL;
5581 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5582 if (!acpi_ec_write(i, v))
5583 return -EIO;
5584 } else
5585 return -EINVAL;
5586 }
5587
5588 return 0;
5589 }
5590
5591 static struct ibm_struct ecdump_driver_data = {
5592 .name = "ecdump",
5593 .read = ecdump_read,
5594 .write = ecdump_write,
5595 .flags.experimental = 1,
5596 };
5597
5598 /*************************************************************************
5599 * Backlight/brightness subdriver
5600 */
5601
5602 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5603
5604 /*
5605 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5606 * CMOS NVRAM byte 0x5E, bits 0-3.
5607 *
5608 * EC HBRV (0x31) has the following layout
5609 * Bit 7: unknown function
5610 * Bit 6: unknown function
5611 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5612 * Bit 4: must be set to zero to avoid problems
5613 * Bit 3-0: backlight brightness level
5614 *
5615 * brightness_get_raw returns status data in the HBRV layout
5616 *
5617 * WARNING: The X61 has been verified to use HBRV for something else, so
5618 * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5619 * testing on the very early *60 Lenovo models...
5620 */
5621
5622 enum {
5623 TP_EC_BACKLIGHT = 0x31,
5624
5625 /* TP_EC_BACKLIGHT bitmasks */
5626 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5627 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5628 TP_EC_BACKLIGHT_MAPSW = 0x20,
5629 };
5630
5631 enum tpacpi_brightness_access_mode {
5632 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5633 TPACPI_BRGHT_MODE_EC, /* EC control */
5634 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5635 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5636 TPACPI_BRGHT_MODE_MAX
5637 };
5638
5639 static struct backlight_device *ibm_backlight_device;
5640
5641 static enum tpacpi_brightness_access_mode brightness_mode =
5642 TPACPI_BRGHT_MODE_MAX;
5643
5644 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5645
5646 static struct mutex brightness_mutex;
5647
5648 /* NVRAM brightness access,
5649 * call with brightness_mutex held! */
5650 static unsigned int tpacpi_brightness_nvram_get(void)
5651 {
5652 u8 lnvram;
5653
5654 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5655 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5656 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5657 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5658
5659 return lnvram;
5660 }
5661
5662 static void tpacpi_brightness_checkpoint_nvram(void)
5663 {
5664 u8 lec = 0;
5665 u8 b_nvram;
5666
5667 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5668 return;
5669
5670 vdbg_printk(TPACPI_DBG_BRGHT,
5671 "trying to checkpoint backlight level to NVRAM...\n");
5672
5673 if (mutex_lock_killable(&brightness_mutex) < 0)
5674 return;
5675
5676 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5677 goto unlock;
5678 lec &= TP_EC_BACKLIGHT_LVLMSK;
5679 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5680
5681 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5682 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5683 /* NVRAM needs update */
5684 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5685 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5686 b_nvram |= lec;
5687 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5688 dbg_printk(TPACPI_DBG_BRGHT,
5689 "updated NVRAM backlight level to %u (0x%02x)\n",
5690 (unsigned int) lec, (unsigned int) b_nvram);
5691 } else
5692 vdbg_printk(TPACPI_DBG_BRGHT,
5693 "NVRAM backlight level already is %u (0x%02x)\n",
5694 (unsigned int) lec, (unsigned int) b_nvram);
5695
5696 unlock:
5697 mutex_unlock(&brightness_mutex);
5698 }
5699
5700
5701 /* call with brightness_mutex held! */
5702 static int tpacpi_brightness_get_raw(int *status)
5703 {
5704 u8 lec = 0;
5705
5706 switch (brightness_mode) {
5707 case TPACPI_BRGHT_MODE_UCMS_STEP:
5708 *status = tpacpi_brightness_nvram_get();
5709 return 0;
5710 case TPACPI_BRGHT_MODE_EC:
5711 case TPACPI_BRGHT_MODE_ECNVRAM:
5712 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5713 return -EIO;
5714 *status = lec;
5715 return 0;
5716 default:
5717 return -ENXIO;
5718 }
5719 }
5720
5721 /* call with brightness_mutex held! */
5722 /* do NOT call with illegal backlight level value */
5723 static int tpacpi_brightness_set_ec(unsigned int value)
5724 {
5725 u8 lec = 0;
5726
5727 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5728 return -EIO;
5729
5730 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5731 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5732 (value & TP_EC_BACKLIGHT_LVLMSK))))
5733 return -EIO;
5734
5735 return 0;
5736 }
5737
5738 /* call with brightness_mutex held! */
5739 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5740 {
5741 int cmos_cmd, inc;
5742 unsigned int current_value, i;
5743
5744 current_value = tpacpi_brightness_nvram_get();
5745
5746 if (value == current_value)
5747 return 0;
5748
5749 cmos_cmd = (value > current_value) ?
5750 TP_CMOS_BRIGHTNESS_UP :
5751 TP_CMOS_BRIGHTNESS_DOWN;
5752 inc = (value > current_value) ? 1 : -1;
5753
5754 for (i = current_value; i != value; i += inc)
5755 if (issue_thinkpad_cmos_command(cmos_cmd))
5756 return -EIO;
5757
5758 return 0;
5759 }
5760
5761 /* May return EINTR which can always be mapped to ERESTARTSYS */
5762 static int brightness_set(unsigned int value)
5763 {
5764 int res;
5765
5766 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5767 value < 0)
5768 return -EINVAL;
5769
5770 vdbg_printk(TPACPI_DBG_BRGHT,
5771 "set backlight level to %d\n", value);
5772
5773 res = mutex_lock_killable(&brightness_mutex);
5774 if (res < 0)
5775 return res;
5776
5777 switch (brightness_mode) {
5778 case TPACPI_BRGHT_MODE_EC:
5779 case TPACPI_BRGHT_MODE_ECNVRAM:
5780 res = tpacpi_brightness_set_ec(value);
5781 break;
5782 case TPACPI_BRGHT_MODE_UCMS_STEP:
5783 res = tpacpi_brightness_set_ucmsstep(value);
5784 break;
5785 default:
5786 res = -ENXIO;
5787 }
5788
5789 mutex_unlock(&brightness_mutex);
5790 return res;
5791 }
5792
5793 /* sysfs backlight class ----------------------------------------------- */
5794
5795 static int brightness_update_status(struct backlight_device *bd)
5796 {
5797 unsigned int level =
5798 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5799 bd->props.power == FB_BLANK_UNBLANK) ?
5800 bd->props.brightness : 0;
5801
5802 dbg_printk(TPACPI_DBG_BRGHT,
5803 "backlight: attempt to set level to %d\n",
5804 level);
5805
5806 /* it is the backlight class's job (caller) to handle
5807 * EINTR and other errors properly */
5808 return brightness_set(level);
5809 }
5810
5811 static int brightness_get(struct backlight_device *bd)
5812 {
5813 int status, res;
5814
5815 res = mutex_lock_killable(&brightness_mutex);
5816 if (res < 0)
5817 return 0;
5818
5819 res = tpacpi_brightness_get_raw(&status);
5820
5821 mutex_unlock(&brightness_mutex);
5822
5823 if (res < 0)
5824 return 0;
5825
5826 return status & TP_EC_BACKLIGHT_LVLMSK;
5827 }
5828
5829 static struct backlight_ops ibm_backlight_data = {
5830 .get_brightness = brightness_get,
5831 .update_status = brightness_update_status,
5832 };
5833
5834 /* --------------------------------------------------------------------- */
5835
5836 /*
5837 * These are only useful for models that have only one possibility
5838 * of GPU. If the BIOS model handles both ATI and Intel, don't use
5839 * these quirks.
5840 */
5841 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */
5842 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */
5843 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */
5844
5845 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
5846 /* Models with ATI GPUs known to require ECNVRAM mode */
5847 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */
5848
5849 /* Models with ATI GPUs that can use ECNVRAM */
5850 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
5851 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5852 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5853 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5854
5855 /* Models with Intel Extreme Graphics 2 */
5856 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
5857 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5858 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5859
5860 /* Models with Intel GMA900 */
5861 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */
5862 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */
5863 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */
5864 };
5865
5866 static int __init brightness_init(struct ibm_init_struct *iibm)
5867 {
5868 int b;
5869 unsigned long quirks;
5870
5871 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5872
5873 mutex_init(&brightness_mutex);
5874
5875 quirks = tpacpi_check_quirks(brightness_quirk_table,
5876 ARRAY_SIZE(brightness_quirk_table));
5877
5878 /*
5879 * We always attempt to detect acpi support, so as to switch
5880 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5881 * going to publish a backlight interface
5882 */
5883 b = tpacpi_check_std_acpi_brightness_support();
5884 if (b > 0) {
5885
5886 if (acpi_video_backlight_support()) {
5887 if (brightness_enable > 1) {
5888 printk(TPACPI_NOTICE
5889 "Standard ACPI backlight interface "
5890 "available, not loading native one.\n");
5891 return 1;
5892 } else if (brightness_enable == 1) {
5893 printk(TPACPI_NOTICE
5894 "Backlight control force enabled, even if standard "
5895 "ACPI backlight interface is available\n");
5896 }
5897 } else {
5898 if (brightness_enable > 1) {
5899 printk(TPACPI_NOTICE
5900 "Standard ACPI backlight interface not "
5901 "available, thinkpad_acpi native "
5902 "brightness control enabled\n");
5903 }
5904 }
5905 }
5906
5907 if (!brightness_enable) {
5908 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5909 "brightness support disabled by "
5910 "module parameter\n");
5911 return 1;
5912 }
5913
5914 if (b > 16) {
5915 printk(TPACPI_ERR
5916 "Unsupported brightness interface, "
5917 "please contact %s\n", TPACPI_MAIL);
5918 return 1;
5919 }
5920 if (b == 16)
5921 tp_features.bright_16levels = 1;
5922
5923 /*
5924 * Check for module parameter bogosity, note that we
5925 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5926 * able to detect "unspecified"
5927 */
5928 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5929 return -EINVAL;
5930
5931 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5932 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5933 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5934 if (quirks & TPACPI_BRGHT_Q_EC)
5935 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5936 else
5937 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5938
5939 dbg_printk(TPACPI_DBG_BRGHT,
5940 "driver auto-selected brightness_mode=%d\n",
5941 brightness_mode);
5942 }
5943
5944 /* Safety */
5945 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
5946 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
5947 brightness_mode == TPACPI_BRGHT_MODE_EC))
5948 return -EINVAL;
5949
5950 if (tpacpi_brightness_get_raw(&b) < 0)
5951 return 1;
5952
5953 if (tp_features.bright_16levels)
5954 printk(TPACPI_INFO
5955 "detected a 16-level brightness capable ThinkPad\n");
5956
5957 ibm_backlight_device = backlight_device_register(
5958 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5959 &ibm_backlight_data);
5960 if (IS_ERR(ibm_backlight_device)) {
5961 printk(TPACPI_ERR "Could not register backlight device\n");
5962 return PTR_ERR(ibm_backlight_device);
5963 }
5964 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5965 "brightness is supported\n");
5966
5967 if (quirks & TPACPI_BRGHT_Q_ASK) {
5968 printk(TPACPI_NOTICE
5969 "brightness: will use unverified default: "
5970 "brightness_mode=%d\n", brightness_mode);
5971 printk(TPACPI_NOTICE
5972 "brightness: please report to %s whether it works well "
5973 "or not on your ThinkPad\n", TPACPI_MAIL);
5974 }
5975
5976 ibm_backlight_device->props.max_brightness =
5977 (tp_features.bright_16levels)? 15 : 7;
5978 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5979 backlight_update_status(ibm_backlight_device);
5980
5981 return 0;
5982 }
5983
5984 static void brightness_suspend(pm_message_t state)
5985 {
5986 tpacpi_brightness_checkpoint_nvram();
5987 }
5988
5989 static void brightness_shutdown(void)
5990 {
5991 tpacpi_brightness_checkpoint_nvram();
5992 }
5993
5994 static void brightness_exit(void)
5995 {
5996 if (ibm_backlight_device) {
5997 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
5998 "calling backlight_device_unregister()\n");
5999 backlight_device_unregister(ibm_backlight_device);
6000 }
6001
6002 tpacpi_brightness_checkpoint_nvram();
6003 }
6004
6005 static int brightness_read(char *p)
6006 {
6007 int len = 0;
6008 int level;
6009
6010 level = brightness_get(NULL);
6011 if (level < 0) {
6012 len += sprintf(p + len, "level:\t\tunreadable\n");
6013 } else {
6014 len += sprintf(p + len, "level:\t\t%d\n", level);
6015 len += sprintf(p + len, "commands:\tup, down\n");
6016 len += sprintf(p + len, "commands:\tlevel <level>"
6017 " (<level> is 0-%d)\n",
6018 (tp_features.bright_16levels) ? 15 : 7);
6019 }
6020
6021 return len;
6022 }
6023
6024 static int brightness_write(char *buf)
6025 {
6026 int level;
6027 int rc;
6028 char *cmd;
6029 int max_level = (tp_features.bright_16levels) ? 15 : 7;
6030
6031 level = brightness_get(NULL);
6032 if (level < 0)
6033 return level;
6034
6035 while ((cmd = next_cmd(&buf))) {
6036 if (strlencmp(cmd, "up") == 0) {
6037 if (level < max_level)
6038 level++;
6039 } else if (strlencmp(cmd, "down") == 0) {
6040 if (level > 0)
6041 level--;
6042 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6043 level >= 0 && level <= max_level) {
6044 /* new level set */
6045 } else
6046 return -EINVAL;
6047 }
6048
6049 tpacpi_disclose_usertask("procfs brightness",
6050 "set level to %d\n", level);
6051
6052 /*
6053 * Now we know what the final level should be, so we try to set it.
6054 * Doing it this way makes the syscall restartable in case of EINTR
6055 */
6056 rc = brightness_set(level);
6057 return (rc == -EINTR)? ERESTARTSYS : rc;
6058 }
6059
6060 static struct ibm_struct brightness_driver_data = {
6061 .name = "brightness",
6062 .read = brightness_read,
6063 .write = brightness_write,
6064 .exit = brightness_exit,
6065 .suspend = brightness_suspend,
6066 .shutdown = brightness_shutdown,
6067 };
6068
6069 /*************************************************************************
6070 * Volume subdriver
6071 */
6072
6073 static int volume_offset = 0x30;
6074
6075 static int volume_read(char *p)
6076 {
6077 int len = 0;
6078 u8 level;
6079
6080 if (!acpi_ec_read(volume_offset, &level)) {
6081 len += sprintf(p + len, "level:\t\tunreadable\n");
6082 } else {
6083 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6084 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6085 len += sprintf(p + len, "commands:\tup, down, mute\n");
6086 len += sprintf(p + len, "commands:\tlevel <level>"
6087 " (<level> is 0-15)\n");
6088 }
6089
6090 return len;
6091 }
6092
6093 static int volume_write(char *buf)
6094 {
6095 int cmos_cmd, inc, i;
6096 u8 level, mute;
6097 int new_level, new_mute;
6098 char *cmd;
6099
6100 while ((cmd = next_cmd(&buf))) {
6101 if (!acpi_ec_read(volume_offset, &level))
6102 return -EIO;
6103 new_mute = mute = level & 0x40;
6104 new_level = level = level & 0xf;
6105
6106 if (strlencmp(cmd, "up") == 0) {
6107 if (mute)
6108 new_mute = 0;
6109 else
6110 new_level = level == 15 ? 15 : level + 1;
6111 } else if (strlencmp(cmd, "down") == 0) {
6112 if (mute)
6113 new_mute = 0;
6114 else
6115 new_level = level == 0 ? 0 : level - 1;
6116 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6117 new_level >= 0 && new_level <= 15) {
6118 /* new_level set */
6119 } else if (strlencmp(cmd, "mute") == 0) {
6120 new_mute = 0x40;
6121 } else
6122 return -EINVAL;
6123
6124 if (new_level != level) {
6125 /* mute doesn't change */
6126
6127 cmos_cmd = (new_level > level) ?
6128 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6129 inc = new_level > level ? 1 : -1;
6130
6131 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6132 !acpi_ec_write(volume_offset, level)))
6133 return -EIO;
6134
6135 for (i = level; i != new_level; i += inc)
6136 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6137 !acpi_ec_write(volume_offset, i + inc))
6138 return -EIO;
6139
6140 if (mute &&
6141 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6142 !acpi_ec_write(volume_offset, new_level + mute))) {
6143 return -EIO;
6144 }
6145 }
6146
6147 if (new_mute != mute) {
6148 /* level doesn't change */
6149
6150 cmos_cmd = (new_mute) ?
6151 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6152
6153 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6154 !acpi_ec_write(volume_offset, level + new_mute))
6155 return -EIO;
6156 }
6157 }
6158
6159 return 0;
6160 }
6161
6162 static struct ibm_struct volume_driver_data = {
6163 .name = "volume",
6164 .read = volume_read,
6165 .write = volume_write,
6166 };
6167
6168 /*************************************************************************
6169 * Fan subdriver
6170 */
6171
6172 /*
6173 * FAN ACCESS MODES
6174 *
6175 * TPACPI_FAN_RD_ACPI_GFAN:
6176 * ACPI GFAN method: returns fan level
6177 *
6178 * see TPACPI_FAN_WR_ACPI_SFAN
6179 * EC 0x2f (HFSP) not available if GFAN exists
6180 *
6181 * TPACPI_FAN_WR_ACPI_SFAN:
6182 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6183 *
6184 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6185 * it for writing.
6186 *
6187 * TPACPI_FAN_WR_TPEC:
6188 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6189 * Supported on almost all ThinkPads
6190 *
6191 * Fan speed changes of any sort (including those caused by the
6192 * disengaged mode) are usually done slowly by the firmware as the
6193 * maximum ammount of fan duty cycle change per second seems to be
6194 * limited.
6195 *
6196 * Reading is not available if GFAN exists.
6197 * Writing is not available if SFAN exists.
6198 *
6199 * Bits
6200 * 7 automatic mode engaged;
6201 * (default operation mode of the ThinkPad)
6202 * fan level is ignored in this mode.
6203 * 6 full speed mode (takes precedence over bit 7);
6204 * not available on all thinkpads. May disable
6205 * the tachometer while the fan controller ramps up
6206 * the speed (which can take up to a few *minutes*).
6207 * Speeds up fan to 100% duty-cycle, which is far above
6208 * the standard RPM levels. It is not impossible that
6209 * it could cause hardware damage.
6210 * 5-3 unused in some models. Extra bits for fan level
6211 * in others, but still useless as all values above
6212 * 7 map to the same speed as level 7 in these models.
6213 * 2-0 fan level (0..7 usually)
6214 * 0x00 = stop
6215 * 0x07 = max (set when temperatures critical)
6216 * Some ThinkPads may have other levels, see
6217 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6218 *
6219 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6220 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6221 * does so, its initial value is meaningless (0x07).
6222 *
6223 * For firmware bugs, refer to:
6224 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6225 *
6226 * ----
6227 *
6228 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6229 * Main fan tachometer reading (in RPM)
6230 *
6231 * This register is present on all ThinkPads with a new-style EC, and
6232 * it is known not to be present on the A21m/e, and T22, as there is
6233 * something else in offset 0x84 according to the ACPI DSDT. Other
6234 * ThinkPads from this same time period (and earlier) probably lack the
6235 * tachometer as well.
6236 *
6237 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6238 * was never fixed by IBM to report the EC firmware version string
6239 * probably support the tachometer (like the early X models), so
6240 * detecting it is quite hard. We need more data to know for sure.
6241 *
6242 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6243 * might result.
6244 *
6245 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6246 * mode.
6247 *
6248 * For firmware bugs, refer to:
6249 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6250 *
6251 * ----
6252 *
6253 * ThinkPad EC register 0x31 bit 0 (only on select models)
6254 *
6255 * When bit 0 of EC register 0x31 is zero, the tachometer registers
6256 * show the speed of the main fan. When bit 0 of EC register 0x31
6257 * is one, the tachometer registers show the speed of the auxiliary
6258 * fan.
6259 *
6260 * Fan control seems to affect both fans, regardless of the state
6261 * of this bit.
6262 *
6263 * So far, only the firmware for the X60/X61 non-tablet versions
6264 * seem to support this (firmware TP-7M).
6265 *
6266 * TPACPI_FAN_WR_ACPI_FANS:
6267 * ThinkPad X31, X40, X41. Not available in the X60.
6268 *
6269 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6270 * high speed. ACPI DSDT seems to map these three speeds to levels
6271 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6272 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6273 *
6274 * The speeds are stored on handles
6275 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6276 *
6277 * There are three default speed sets, acessible as handles:
6278 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6279 *
6280 * ACPI DSDT switches which set is in use depending on various
6281 * factors.
6282 *
6283 * TPACPI_FAN_WR_TPEC is also available and should be used to
6284 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6285 * but the ACPI tables just mention level 7.
6286 */
6287
6288 enum { /* Fan control constants */
6289 fan_status_offset = 0x2f, /* EC register 0x2f */
6290 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6291 * 0x84 must be read before 0x85 */
6292 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M)
6293 bit 0 selects which fan is active */
6294
6295 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6296 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6297
6298 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6299 };
6300
6301 enum fan_status_access_mode {
6302 TPACPI_FAN_NONE = 0, /* No fan status or control */
6303 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6304 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6305 };
6306
6307 enum fan_control_access_mode {
6308 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6309 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6310 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6311 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6312 };
6313
6314 enum fan_control_commands {
6315 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6316 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6317 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6318 * and also watchdog cmd */
6319 };
6320
6321 static int fan_control_allowed;
6322
6323 static enum fan_status_access_mode fan_status_access_mode;
6324 static enum fan_control_access_mode fan_control_access_mode;
6325 static enum fan_control_commands fan_control_commands;
6326
6327 static u8 fan_control_initial_status;
6328 static u8 fan_control_desired_level;
6329 static u8 fan_control_resume_level;
6330 static int fan_watchdog_maxinterval;
6331
6332 static struct mutex fan_mutex;
6333
6334 static void fan_watchdog_fire(struct work_struct *ignored);
6335 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6336
6337 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6338 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6339 "\\FSPD", /* 600e/x, 770e, 770x */
6340 ); /* all others */
6341 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6342 "JFNS", /* 770x-JL */
6343 ); /* all others */
6344
6345 /*
6346 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6347 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6348 * be in auto mode (0x80).
6349 *
6350 * This is corrected by any write to HFSP either by the driver, or
6351 * by the firmware.
6352 *
6353 * We assume 0x07 really means auto mode while this quirk is active,
6354 * as this is far more likely than the ThinkPad being in level 7,
6355 * which is only used by the firmware during thermal emergencies.
6356 *
6357 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6358 * TP-70 (T43, R52), which are known to be buggy.
6359 */
6360
6361 static void fan_quirk1_setup(void)
6362 {
6363 if (fan_control_initial_status == 0x07) {
6364 printk(TPACPI_NOTICE
6365 "fan_init: initial fan status is unknown, "
6366 "assuming it is in auto mode\n");
6367 tp_features.fan_ctrl_status_undef = 1;
6368 }
6369 }
6370
6371 static void fan_quirk1_handle(u8 *fan_status)
6372 {
6373 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6374 if (*fan_status != fan_control_initial_status) {
6375 /* something changed the HFSP regisnter since
6376 * driver init time, so it is not undefined
6377 * anymore */
6378 tp_features.fan_ctrl_status_undef = 0;
6379 } else {
6380 /* Return most likely status. In fact, it
6381 * might be the only possible status */
6382 *fan_status = TP_EC_FAN_AUTO;
6383 }
6384 }
6385 }
6386
6387 /* Select main fan on X60/X61, NOOP on others */
6388 static bool fan_select_fan1(void)
6389 {
6390 if (tp_features.second_fan) {
6391 u8 val;
6392
6393 if (ec_read(fan_select_offset, &val) < 0)
6394 return false;
6395 val &= 0xFEU;
6396 if (ec_write(fan_select_offset, val) < 0)
6397 return false;
6398 }
6399 return true;
6400 }
6401
6402 /* Select secondary fan on X60/X61 */
6403 static bool fan_select_fan2(void)
6404 {
6405 u8 val;
6406
6407 if (!tp_features.second_fan)
6408 return false;
6409
6410 if (ec_read(fan_select_offset, &val) < 0)
6411 return false;
6412 val |= 0x01U;
6413 if (ec_write(fan_select_offset, val) < 0)
6414 return false;
6415
6416 return true;
6417 }
6418
6419 /*
6420 * Call with fan_mutex held
6421 */
6422 static void fan_update_desired_level(u8 status)
6423 {
6424 if ((status &
6425 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6426 if (status > 7)
6427 fan_control_desired_level = 7;
6428 else
6429 fan_control_desired_level = status;
6430 }
6431 }
6432
6433 static int fan_get_status(u8 *status)
6434 {
6435 u8 s;
6436
6437 /* TODO:
6438 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6439
6440 switch (fan_status_access_mode) {
6441 case TPACPI_FAN_RD_ACPI_GFAN:
6442 /* 570, 600e/x, 770e, 770x */
6443
6444 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6445 return -EIO;
6446
6447 if (likely(status))
6448 *status = s & 0x07;
6449
6450 break;
6451
6452 case TPACPI_FAN_RD_TPEC:
6453 /* all except 570, 600e/x, 770e, 770x */
6454 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6455 return -EIO;
6456
6457 if (likely(status)) {
6458 *status = s;
6459 fan_quirk1_handle(status);
6460 }
6461
6462 break;
6463
6464 default:
6465 return -ENXIO;
6466 }
6467
6468 return 0;
6469 }
6470
6471 static int fan_get_status_safe(u8 *status)
6472 {
6473 int rc;
6474 u8 s;
6475
6476 if (mutex_lock_killable(&fan_mutex))
6477 return -ERESTARTSYS;
6478 rc = fan_get_status(&s);
6479 if (!rc)
6480 fan_update_desired_level(s);
6481 mutex_unlock(&fan_mutex);
6482
6483 if (status)
6484 *status = s;
6485
6486 return rc;
6487 }
6488
6489 static int fan_get_speed(unsigned int *speed)
6490 {
6491 u8 hi, lo;
6492
6493 switch (fan_status_access_mode) {
6494 case TPACPI_FAN_RD_TPEC:
6495 /* all except 570, 600e/x, 770e, 770x */
6496 if (unlikely(!fan_select_fan1()))
6497 return -EIO;
6498 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6499 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6500 return -EIO;
6501
6502 if (likely(speed))
6503 *speed = (hi << 8) | lo;
6504
6505 break;
6506
6507 default:
6508 return -ENXIO;
6509 }
6510
6511 return 0;
6512 }
6513
6514 static int fan2_get_speed(unsigned int *speed)
6515 {
6516 u8 hi, lo;
6517 bool rc;
6518
6519 switch (fan_status_access_mode) {
6520 case TPACPI_FAN_RD_TPEC:
6521 /* all except 570, 600e/x, 770e, 770x */
6522 if (unlikely(!fan_select_fan2()))
6523 return -EIO;
6524 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6525 !acpi_ec_read(fan_rpm_offset + 1, &hi);
6526 fan_select_fan1(); /* play it safe */
6527 if (rc)
6528 return -EIO;
6529
6530 if (likely(speed))
6531 *speed = (hi << 8) | lo;
6532
6533 break;
6534
6535 default:
6536 return -ENXIO;
6537 }
6538
6539 return 0;
6540 }
6541
6542 static int fan_set_level(int level)
6543 {
6544 if (!fan_control_allowed)
6545 return -EPERM;
6546
6547 switch (fan_control_access_mode) {
6548 case TPACPI_FAN_WR_ACPI_SFAN:
6549 if (level >= 0 && level <= 7) {
6550 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6551 return -EIO;
6552 } else
6553 return -EINVAL;
6554 break;
6555
6556 case TPACPI_FAN_WR_ACPI_FANS:
6557 case TPACPI_FAN_WR_TPEC:
6558 if (!(level & TP_EC_FAN_AUTO) &&
6559 !(level & TP_EC_FAN_FULLSPEED) &&
6560 ((level < 0) || (level > 7)))
6561 return -EINVAL;
6562
6563 /* safety net should the EC not support AUTO
6564 * or FULLSPEED mode bits and just ignore them */
6565 if (level & TP_EC_FAN_FULLSPEED)
6566 level |= 7; /* safety min speed 7 */
6567 else if (level & TP_EC_FAN_AUTO)
6568 level |= 4; /* safety min speed 4 */
6569
6570 if (!acpi_ec_write(fan_status_offset, level))
6571 return -EIO;
6572 else
6573 tp_features.fan_ctrl_status_undef = 0;
6574 break;
6575
6576 default:
6577 return -ENXIO;
6578 }
6579
6580 vdbg_printk(TPACPI_DBG_FAN,
6581 "fan control: set fan control register to 0x%02x\n", level);
6582 return 0;
6583 }
6584
6585 static int fan_set_level_safe(int level)
6586 {
6587 int rc;
6588
6589 if (!fan_control_allowed)
6590 return -EPERM;
6591
6592 if (mutex_lock_killable(&fan_mutex))
6593 return -ERESTARTSYS;
6594
6595 if (level == TPACPI_FAN_LAST_LEVEL)
6596 level = fan_control_desired_level;
6597
6598 rc = fan_set_level(level);
6599 if (!rc)
6600 fan_update_desired_level(level);
6601
6602 mutex_unlock(&fan_mutex);
6603 return rc;
6604 }
6605
6606 static int fan_set_enable(void)
6607 {
6608 u8 s;
6609 int rc;
6610
6611 if (!fan_control_allowed)
6612 return -EPERM;
6613
6614 if (mutex_lock_killable(&fan_mutex))
6615 return -ERESTARTSYS;
6616
6617 switch (fan_control_access_mode) {
6618 case TPACPI_FAN_WR_ACPI_FANS:
6619 case TPACPI_FAN_WR_TPEC:
6620 rc = fan_get_status(&s);
6621 if (rc < 0)
6622 break;
6623
6624 /* Don't go out of emergency fan mode */
6625 if (s != 7) {
6626 s &= 0x07;
6627 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6628 }
6629
6630 if (!acpi_ec_write(fan_status_offset, s))
6631 rc = -EIO;
6632 else {
6633 tp_features.fan_ctrl_status_undef = 0;
6634 rc = 0;
6635 }
6636 break;
6637
6638 case TPACPI_FAN_WR_ACPI_SFAN:
6639 rc = fan_get_status(&s);
6640 if (rc < 0)
6641 break;
6642
6643 s &= 0x07;
6644
6645 /* Set fan to at least level 4 */
6646 s |= 4;
6647
6648 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6649 rc = -EIO;
6650 else
6651 rc = 0;
6652 break;
6653
6654 default:
6655 rc = -ENXIO;
6656 }
6657
6658 mutex_unlock(&fan_mutex);
6659
6660 if (!rc)
6661 vdbg_printk(TPACPI_DBG_FAN,
6662 "fan control: set fan control register to 0x%02x\n",
6663 s);
6664 return rc;
6665 }
6666
6667 static int fan_set_disable(void)
6668 {
6669 int rc;
6670
6671 if (!fan_control_allowed)
6672 return -EPERM;
6673
6674 if (mutex_lock_killable(&fan_mutex))
6675 return -ERESTARTSYS;
6676
6677 rc = 0;
6678 switch (fan_control_access_mode) {
6679 case TPACPI_FAN_WR_ACPI_FANS:
6680 case TPACPI_FAN_WR_TPEC:
6681 if (!acpi_ec_write(fan_status_offset, 0x00))
6682 rc = -EIO;
6683 else {
6684 fan_control_desired_level = 0;
6685 tp_features.fan_ctrl_status_undef = 0;
6686 }
6687 break;
6688
6689 case TPACPI_FAN_WR_ACPI_SFAN:
6690 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6691 rc = -EIO;
6692 else
6693 fan_control_desired_level = 0;
6694 break;
6695
6696 default:
6697 rc = -ENXIO;
6698 }
6699
6700 if (!rc)
6701 vdbg_printk(TPACPI_DBG_FAN,
6702 "fan control: set fan control register to 0\n");
6703
6704 mutex_unlock(&fan_mutex);
6705 return rc;
6706 }
6707
6708 static int fan_set_speed(int speed)
6709 {
6710 int rc;
6711
6712 if (!fan_control_allowed)
6713 return -EPERM;
6714
6715 if (mutex_lock_killable(&fan_mutex))
6716 return -ERESTARTSYS;
6717
6718 rc = 0;
6719 switch (fan_control_access_mode) {
6720 case TPACPI_FAN_WR_ACPI_FANS:
6721 if (speed >= 0 && speed <= 65535) {
6722 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6723 speed, speed, speed))
6724 rc = -EIO;
6725 } else
6726 rc = -EINVAL;
6727 break;
6728
6729 default:
6730 rc = -ENXIO;
6731 }
6732
6733 mutex_unlock(&fan_mutex);
6734 return rc;
6735 }
6736
6737 static void fan_watchdog_reset(void)
6738 {
6739 static int fan_watchdog_active;
6740
6741 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6742 return;
6743
6744 if (fan_watchdog_active)
6745 cancel_delayed_work(&fan_watchdog_task);
6746
6747 if (fan_watchdog_maxinterval > 0 &&
6748 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6749 fan_watchdog_active = 1;
6750 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6751 msecs_to_jiffies(fan_watchdog_maxinterval
6752 * 1000))) {
6753 printk(TPACPI_ERR
6754 "failed to queue the fan watchdog, "
6755 "watchdog will not trigger\n");
6756 }
6757 } else
6758 fan_watchdog_active = 0;
6759 }
6760
6761 static void fan_watchdog_fire(struct work_struct *ignored)
6762 {
6763 int rc;
6764
6765 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6766 return;
6767
6768 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6769 rc = fan_set_enable();
6770 if (rc < 0) {
6771 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6772 "will try again later...\n", -rc);
6773 /* reschedule for later */
6774 fan_watchdog_reset();
6775 }
6776 }
6777
6778 /*
6779 * SYSFS fan layout: hwmon compatible (device)
6780 *
6781 * pwm*_enable:
6782 * 0: "disengaged" mode
6783 * 1: manual mode
6784 * 2: native EC "auto" mode (recommended, hardware default)
6785 *
6786 * pwm*: set speed in manual mode, ignored otherwise.
6787 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6788 * interpolation.
6789 *
6790 * fan*_input: tachometer reading, RPM
6791 *
6792 *
6793 * SYSFS fan layout: extensions
6794 *
6795 * fan_watchdog (driver):
6796 * fan watchdog interval in seconds, 0 disables (default), max 120
6797 */
6798
6799 /* sysfs fan pwm1_enable ----------------------------------------------- */
6800 static ssize_t fan_pwm1_enable_show(struct device *dev,
6801 struct device_attribute *attr,
6802 char *buf)
6803 {
6804 int res, mode;
6805 u8 status;
6806
6807 res = fan_get_status_safe(&status);
6808 if (res)
6809 return res;
6810
6811 if (status & TP_EC_FAN_FULLSPEED) {
6812 mode = 0;
6813 } else if (status & TP_EC_FAN_AUTO) {
6814 mode = 2;
6815 } else
6816 mode = 1;
6817
6818 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6819 }
6820
6821 static ssize_t fan_pwm1_enable_store(struct device *dev,
6822 struct device_attribute *attr,
6823 const char *buf, size_t count)
6824 {
6825 unsigned long t;
6826 int res, level;
6827
6828 if (parse_strtoul(buf, 2, &t))
6829 return -EINVAL;
6830
6831 tpacpi_disclose_usertask("hwmon pwm1_enable",
6832 "set fan mode to %lu\n", t);
6833
6834 switch (t) {
6835 case 0:
6836 level = TP_EC_FAN_FULLSPEED;
6837 break;
6838 case 1:
6839 level = TPACPI_FAN_LAST_LEVEL;
6840 break;
6841 case 2:
6842 level = TP_EC_FAN_AUTO;
6843 break;
6844 case 3:
6845 /* reserved for software-controlled auto mode */
6846 return -ENOSYS;
6847 default:
6848 return -EINVAL;
6849 }
6850
6851 res = fan_set_level_safe(level);
6852 if (res == -ENXIO)
6853 return -EINVAL;
6854 else if (res < 0)
6855 return res;
6856
6857 fan_watchdog_reset();
6858
6859 return count;
6860 }
6861
6862 static struct device_attribute dev_attr_fan_pwm1_enable =
6863 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6864 fan_pwm1_enable_show, fan_pwm1_enable_store);
6865
6866 /* sysfs fan pwm1 ------------------------------------------------------ */
6867 static ssize_t fan_pwm1_show(struct device *dev,
6868 struct device_attribute *attr,
6869 char *buf)
6870 {
6871 int res;
6872 u8 status;
6873
6874 res = fan_get_status_safe(&status);
6875 if (res)
6876 return res;
6877
6878 if ((status &
6879 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6880 status = fan_control_desired_level;
6881
6882 if (status > 7)
6883 status = 7;
6884
6885 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6886 }
6887
6888 static ssize_t fan_pwm1_store(struct device *dev,
6889 struct device_attribute *attr,
6890 const char *buf, size_t count)
6891 {
6892 unsigned long s;
6893 int rc;
6894 u8 status, newlevel;
6895
6896 if (parse_strtoul(buf, 255, &s))
6897 return -EINVAL;
6898
6899 tpacpi_disclose_usertask("hwmon pwm1",
6900 "set fan speed to %lu\n", s);
6901
6902 /* scale down from 0-255 to 0-7 */
6903 newlevel = (s >> 5) & 0x07;
6904
6905 if (mutex_lock_killable(&fan_mutex))
6906 return -ERESTARTSYS;
6907
6908 rc = fan_get_status(&status);
6909 if (!rc && (status &
6910 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6911 rc = fan_set_level(newlevel);
6912 if (rc == -ENXIO)
6913 rc = -EINVAL;
6914 else if (!rc) {
6915 fan_update_desired_level(newlevel);
6916 fan_watchdog_reset();
6917 }
6918 }
6919
6920 mutex_unlock(&fan_mutex);
6921 return (rc)? rc : count;
6922 }
6923
6924 static struct device_attribute dev_attr_fan_pwm1 =
6925 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6926 fan_pwm1_show, fan_pwm1_store);
6927
6928 /* sysfs fan fan1_input ------------------------------------------------ */
6929 static ssize_t fan_fan1_input_show(struct device *dev,
6930 struct device_attribute *attr,
6931 char *buf)
6932 {
6933 int res;
6934 unsigned int speed;
6935
6936 res = fan_get_speed(&speed);
6937 if (res < 0)
6938 return res;
6939
6940 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6941 }
6942
6943 static struct device_attribute dev_attr_fan_fan1_input =
6944 __ATTR(fan1_input, S_IRUGO,
6945 fan_fan1_input_show, NULL);
6946
6947 /* sysfs fan fan2_input ------------------------------------------------ */
6948 static ssize_t fan_fan2_input_show(struct device *dev,
6949 struct device_attribute *attr,
6950 char *buf)
6951 {
6952 int res;
6953 unsigned int speed;
6954
6955 res = fan2_get_speed(&speed);
6956 if (res < 0)
6957 return res;
6958
6959 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6960 }
6961
6962 static struct device_attribute dev_attr_fan_fan2_input =
6963 __ATTR(fan2_input, S_IRUGO,
6964 fan_fan2_input_show, NULL);
6965
6966 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6967 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6968 char *buf)
6969 {
6970 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6971 }
6972
6973 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6974 const char *buf, size_t count)
6975 {
6976 unsigned long t;
6977
6978 if (parse_strtoul(buf, 120, &t))
6979 return -EINVAL;
6980
6981 if (!fan_control_allowed)
6982 return -EPERM;
6983
6984 fan_watchdog_maxinterval = t;
6985 fan_watchdog_reset();
6986
6987 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
6988
6989 return count;
6990 }
6991
6992 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6993 fan_fan_watchdog_show, fan_fan_watchdog_store);
6994
6995 /* --------------------------------------------------------------------- */
6996 static struct attribute *fan_attributes[] = {
6997 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6998 &dev_attr_fan_fan1_input.attr,
6999 NULL, /* for fan2_input */
7000 NULL
7001 };
7002
7003 static const struct attribute_group fan_attr_group = {
7004 .attrs = fan_attributes,
7005 };
7006
7007 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */
7008 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */
7009
7010 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \
7011 { .vendor = PCI_VENDOR_ID_IBM, \
7012 .bios = TPACPI_MATCH_ANY, \
7013 .ec = TPID(__id1, __id2), \
7014 .quirks = __quirks }
7015
7016 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \
7017 { .vendor = PCI_VENDOR_ID_LENOVO, \
7018 .bios = TPACPI_MATCH_ANY, \
7019 .ec = TPID(__id1, __id2), \
7020 .quirks = __quirks }
7021
7022 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7023 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7024 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7025 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7026 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7027 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7028 };
7029
7030 #undef TPACPI_FAN_QL
7031 #undef TPACPI_FAN_QI
7032
7033 static int __init fan_init(struct ibm_init_struct *iibm)
7034 {
7035 int rc;
7036 unsigned long quirks;
7037
7038 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7039 "initializing fan subdriver\n");
7040
7041 mutex_init(&fan_mutex);
7042 fan_status_access_mode = TPACPI_FAN_NONE;
7043 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7044 fan_control_commands = 0;
7045 fan_watchdog_maxinterval = 0;
7046 tp_features.fan_ctrl_status_undef = 0;
7047 tp_features.second_fan = 0;
7048 fan_control_desired_level = 7;
7049
7050 TPACPI_ACPIHANDLE_INIT(fans);
7051 TPACPI_ACPIHANDLE_INIT(gfan);
7052 TPACPI_ACPIHANDLE_INIT(sfan);
7053
7054 quirks = tpacpi_check_quirks(fan_quirk_table,
7055 ARRAY_SIZE(fan_quirk_table));
7056
7057 if (gfan_handle) {
7058 /* 570, 600e/x, 770e, 770x */
7059 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7060 } else {
7061 /* all other ThinkPads: note that even old-style
7062 * ThinkPad ECs supports the fan control register */
7063 if (likely(acpi_ec_read(fan_status_offset,
7064 &fan_control_initial_status))) {
7065 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7066 if (quirks & TPACPI_FAN_Q1)
7067 fan_quirk1_setup();
7068 if (quirks & TPACPI_FAN_2FAN) {
7069 tp_features.second_fan = 1;
7070 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7071 "secondary fan support enabled\n");
7072 }
7073 } else {
7074 printk(TPACPI_ERR
7075 "ThinkPad ACPI EC access misbehaving, "
7076 "fan status and control unavailable\n");
7077 return 1;
7078 }
7079 }
7080
7081 if (sfan_handle) {
7082 /* 570, 770x-JL */
7083 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7084 fan_control_commands |=
7085 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7086 } else {
7087 if (!gfan_handle) {
7088 /* gfan without sfan means no fan control */
7089 /* all other models implement TP EC 0x2f control */
7090
7091 if (fans_handle) {
7092 /* X31, X40, X41 */
7093 fan_control_access_mode =
7094 TPACPI_FAN_WR_ACPI_FANS;
7095 fan_control_commands |=
7096 TPACPI_FAN_CMD_SPEED |
7097 TPACPI_FAN_CMD_LEVEL |
7098 TPACPI_FAN_CMD_ENABLE;
7099 } else {
7100 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7101 fan_control_commands |=
7102 TPACPI_FAN_CMD_LEVEL |
7103 TPACPI_FAN_CMD_ENABLE;
7104 }
7105 }
7106 }
7107
7108 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7109 "fan is %s, modes %d, %d\n",
7110 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7111 fan_control_access_mode != TPACPI_FAN_WR_NONE),
7112 fan_status_access_mode, fan_control_access_mode);
7113
7114 /* fan control master switch */
7115 if (!fan_control_allowed) {
7116 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7117 fan_control_commands = 0;
7118 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7119 "fan control features disabled by parameter\n");
7120 }
7121
7122 /* update fan_control_desired_level */
7123 if (fan_status_access_mode != TPACPI_FAN_NONE)
7124 fan_get_status_safe(NULL);
7125
7126 if (fan_status_access_mode != TPACPI_FAN_NONE ||
7127 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7128 if (tp_features.second_fan) {
7129 /* attach second fan tachometer */
7130 fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7131 &dev_attr_fan_fan2_input.attr;
7132 }
7133 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7134 &fan_attr_group);
7135 if (rc < 0)
7136 return rc;
7137
7138 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7139 &driver_attr_fan_watchdog);
7140 if (rc < 0) {
7141 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7142 &fan_attr_group);
7143 return rc;
7144 }
7145 return 0;
7146 } else
7147 return 1;
7148 }
7149
7150 static void fan_exit(void)
7151 {
7152 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7153 "cancelling any pending fan watchdog tasks\n");
7154
7155 /* FIXME: can we really do this unconditionally? */
7156 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7157 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7158 &driver_attr_fan_watchdog);
7159
7160 cancel_delayed_work(&fan_watchdog_task);
7161 flush_workqueue(tpacpi_wq);
7162 }
7163
7164 static void fan_suspend(pm_message_t state)
7165 {
7166 int rc;
7167
7168 if (!fan_control_allowed)
7169 return;
7170
7171 /* Store fan status in cache */
7172 fan_control_resume_level = 0;
7173 rc = fan_get_status_safe(&fan_control_resume_level);
7174 if (rc < 0)
7175 printk(TPACPI_NOTICE
7176 "failed to read fan level for later "
7177 "restore during resume: %d\n", rc);
7178
7179 /* if it is undefined, don't attempt to restore it.
7180 * KEEP THIS LAST */
7181 if (tp_features.fan_ctrl_status_undef)
7182 fan_control_resume_level = 0;
7183 }
7184
7185 static void fan_resume(void)
7186 {
7187 u8 current_level = 7;
7188 bool do_set = false;
7189 int rc;
7190
7191 /* DSDT *always* updates status on resume */
7192 tp_features.fan_ctrl_status_undef = 0;
7193
7194 if (!fan_control_allowed ||
7195 !fan_control_resume_level ||
7196 (fan_get_status_safe(&current_level) < 0))
7197 return;
7198
7199 switch (fan_control_access_mode) {
7200 case TPACPI_FAN_WR_ACPI_SFAN:
7201 /* never decrease fan level */
7202 do_set = (fan_control_resume_level > current_level);
7203 break;
7204 case TPACPI_FAN_WR_ACPI_FANS:
7205 case TPACPI_FAN_WR_TPEC:
7206 /* never decrease fan level, scale is:
7207 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7208 *
7209 * We expect the firmware to set either 7 or AUTO, but we
7210 * handle FULLSPEED out of paranoia.
7211 *
7212 * So, we can safely only restore FULLSPEED or 7, anything
7213 * else could slow the fan. Restoring AUTO is useless, at
7214 * best that's exactly what the DSDT already set (it is the
7215 * slower it uses).
7216 *
7217 * Always keep in mind that the DSDT *will* have set the
7218 * fans to what the vendor supposes is the best level. We
7219 * muck with it only to speed the fan up.
7220 */
7221 if (fan_control_resume_level != 7 &&
7222 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7223 return;
7224 else
7225 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7226 (current_level != fan_control_resume_level);
7227 break;
7228 default:
7229 return;
7230 }
7231 if (do_set) {
7232 printk(TPACPI_NOTICE
7233 "restoring fan level to 0x%02x\n",
7234 fan_control_resume_level);
7235 rc = fan_set_level_safe(fan_control_resume_level);
7236 if (rc < 0)
7237 printk(TPACPI_NOTICE
7238 "failed to restore fan level: %d\n", rc);
7239 }
7240 }
7241
7242 static int fan_read(char *p)
7243 {
7244 int len = 0;
7245 int rc;
7246 u8 status;
7247 unsigned int speed = 0;
7248
7249 switch (fan_status_access_mode) {
7250 case TPACPI_FAN_RD_ACPI_GFAN:
7251 /* 570, 600e/x, 770e, 770x */
7252 rc = fan_get_status_safe(&status);
7253 if (rc < 0)
7254 return rc;
7255
7256 len += sprintf(p + len, "status:\t\t%s\n"
7257 "level:\t\t%d\n",
7258 (status != 0) ? "enabled" : "disabled", status);
7259 break;
7260
7261 case TPACPI_FAN_RD_TPEC:
7262 /* all except 570, 600e/x, 770e, 770x */
7263 rc = fan_get_status_safe(&status);
7264 if (rc < 0)
7265 return rc;
7266
7267 len += sprintf(p + len, "status:\t\t%s\n",
7268 (status != 0) ? "enabled" : "disabled");
7269
7270 rc = fan_get_speed(&speed);
7271 if (rc < 0)
7272 return rc;
7273
7274 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7275
7276 if (status & TP_EC_FAN_FULLSPEED)
7277 /* Disengaged mode takes precedence */
7278 len += sprintf(p + len, "level:\t\tdisengaged\n");
7279 else if (status & TP_EC_FAN_AUTO)
7280 len += sprintf(p + len, "level:\t\tauto\n");
7281 else
7282 len += sprintf(p + len, "level:\t\t%d\n", status);
7283 break;
7284
7285 case TPACPI_FAN_NONE:
7286 default:
7287 len += sprintf(p + len, "status:\t\tnot supported\n");
7288 }
7289
7290 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7291 len += sprintf(p + len, "commands:\tlevel <level>");
7292
7293 switch (fan_control_access_mode) {
7294 case TPACPI_FAN_WR_ACPI_SFAN:
7295 len += sprintf(p + len, " (<level> is 0-7)\n");
7296 break;
7297
7298 default:
7299 len += sprintf(p + len, " (<level> is 0-7, "
7300 "auto, disengaged, full-speed)\n");
7301 break;
7302 }
7303 }
7304
7305 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7306 len += sprintf(p + len, "commands:\tenable, disable\n"
7307 "commands:\twatchdog <timeout> (<timeout> "
7308 "is 0 (off), 1-120 (seconds))\n");
7309
7310 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7311 len += sprintf(p + len, "commands:\tspeed <speed>"
7312 " (<speed> is 0-65535)\n");
7313
7314 return len;
7315 }
7316
7317 static int fan_write_cmd_level(const char *cmd, int *rc)
7318 {
7319 int level;
7320
7321 if (strlencmp(cmd, "level auto") == 0)
7322 level = TP_EC_FAN_AUTO;
7323 else if ((strlencmp(cmd, "level disengaged") == 0) |
7324 (strlencmp(cmd, "level full-speed") == 0))
7325 level = TP_EC_FAN_FULLSPEED;
7326 else if (sscanf(cmd, "level %d", &level) != 1)
7327 return 0;
7328
7329 *rc = fan_set_level_safe(level);
7330 if (*rc == -ENXIO)
7331 printk(TPACPI_ERR "level command accepted for unsupported "
7332 "access mode %d", fan_control_access_mode);
7333 else if (!*rc)
7334 tpacpi_disclose_usertask("procfs fan",
7335 "set level to %d\n", level);
7336
7337 return 1;
7338 }
7339
7340 static int fan_write_cmd_enable(const char *cmd, int *rc)
7341 {
7342 if (strlencmp(cmd, "enable") != 0)
7343 return 0;
7344
7345 *rc = fan_set_enable();
7346 if (*rc == -ENXIO)
7347 printk(TPACPI_ERR "enable command accepted for unsupported "
7348 "access mode %d", fan_control_access_mode);
7349 else if (!*rc)
7350 tpacpi_disclose_usertask("procfs fan", "enable\n");
7351
7352 return 1;
7353 }
7354
7355 static int fan_write_cmd_disable(const char *cmd, int *rc)
7356 {
7357 if (strlencmp(cmd, "disable") != 0)
7358 return 0;
7359
7360 *rc = fan_set_disable();
7361 if (*rc == -ENXIO)
7362 printk(TPACPI_ERR "disable command accepted for unsupported "
7363 "access mode %d", fan_control_access_mode);
7364 else if (!*rc)
7365 tpacpi_disclose_usertask("procfs fan", "disable\n");
7366
7367 return 1;
7368 }
7369
7370 static int fan_write_cmd_speed(const char *cmd, int *rc)
7371 {
7372 int speed;
7373
7374 /* TODO:
7375 * Support speed <low> <medium> <high> ? */
7376
7377 if (sscanf(cmd, "speed %d", &speed) != 1)
7378 return 0;
7379
7380 *rc = fan_set_speed(speed);
7381 if (*rc == -ENXIO)
7382 printk(TPACPI_ERR "speed command accepted for unsupported "
7383 "access mode %d", fan_control_access_mode);
7384 else if (!*rc)
7385 tpacpi_disclose_usertask("procfs fan",
7386 "set speed to %d\n", speed);
7387
7388 return 1;
7389 }
7390
7391 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7392 {
7393 int interval;
7394
7395 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7396 return 0;
7397
7398 if (interval < 0 || interval > 120)
7399 *rc = -EINVAL;
7400 else {
7401 fan_watchdog_maxinterval = interval;
7402 tpacpi_disclose_usertask("procfs fan",
7403 "set watchdog timer to %d\n",
7404 interval);
7405 }
7406
7407 return 1;
7408 }
7409
7410 static int fan_write(char *buf)
7411 {
7412 char *cmd;
7413 int rc = 0;
7414
7415 while (!rc && (cmd = next_cmd(&buf))) {
7416 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7417 fan_write_cmd_level(cmd, &rc)) &&
7418 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7419 (fan_write_cmd_enable(cmd, &rc) ||
7420 fan_write_cmd_disable(cmd, &rc) ||
7421 fan_write_cmd_watchdog(cmd, &rc))) &&
7422 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7423 fan_write_cmd_speed(cmd, &rc))
7424 )
7425 rc = -EINVAL;
7426 else if (!rc)
7427 fan_watchdog_reset();
7428 }
7429
7430 return rc;
7431 }
7432
7433 static struct ibm_struct fan_driver_data = {
7434 .name = "fan",
7435 .read = fan_read,
7436 .write = fan_write,
7437 .exit = fan_exit,
7438 .suspend = fan_suspend,
7439 .resume = fan_resume,
7440 };
7441
7442 /****************************************************************************
7443 ****************************************************************************
7444 *
7445 * Infrastructure
7446 *
7447 ****************************************************************************
7448 ****************************************************************************/
7449
7450 /* sysfs name ---------------------------------------------------------- */
7451 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7452 struct device_attribute *attr,
7453 char *buf)
7454 {
7455 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7456 }
7457
7458 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7459 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7460
7461 /* --------------------------------------------------------------------- */
7462
7463 /* /proc support */
7464 static struct proc_dir_entry *proc_dir;
7465
7466 /*
7467 * Module and infrastructure proble, init and exit handling
7468 */
7469
7470 static int force_load;
7471
7472 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7473 static const char * __init str_supported(int is_supported)
7474 {
7475 static char text_unsupported[] __initdata = "not supported";
7476
7477 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7478 }
7479 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7480
7481 static void ibm_exit(struct ibm_struct *ibm)
7482 {
7483 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7484
7485 list_del_init(&ibm->all_drivers);
7486
7487 if (ibm->flags.acpi_notify_installed) {
7488 dbg_printk(TPACPI_DBG_EXIT,
7489 "%s: acpi_remove_notify_handler\n", ibm->name);
7490 BUG_ON(!ibm->acpi);
7491 acpi_remove_notify_handler(*ibm->acpi->handle,
7492 ibm->acpi->type,
7493 dispatch_acpi_notify);
7494 ibm->flags.acpi_notify_installed = 0;
7495 ibm->flags.acpi_notify_installed = 0;
7496 }
7497
7498 if (ibm->flags.proc_created) {
7499 dbg_printk(TPACPI_DBG_EXIT,
7500 "%s: remove_proc_entry\n", ibm->name);
7501 remove_proc_entry(ibm->name, proc_dir);
7502 ibm->flags.proc_created = 0;
7503 }
7504
7505 if (ibm->flags.acpi_driver_registered) {
7506 dbg_printk(TPACPI_DBG_EXIT,
7507 "%s: acpi_bus_unregister_driver\n", ibm->name);
7508 BUG_ON(!ibm->acpi);
7509 acpi_bus_unregister_driver(ibm->acpi->driver);
7510 kfree(ibm->acpi->driver);
7511 ibm->acpi->driver = NULL;
7512 ibm->flags.acpi_driver_registered = 0;
7513 }
7514
7515 if (ibm->flags.init_called && ibm->exit) {
7516 ibm->exit();
7517 ibm->flags.init_called = 0;
7518 }
7519
7520 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7521 }
7522
7523 static int __init ibm_init(struct ibm_init_struct *iibm)
7524 {
7525 int ret;
7526 struct ibm_struct *ibm = iibm->data;
7527 struct proc_dir_entry *entry;
7528
7529 BUG_ON(ibm == NULL);
7530
7531 INIT_LIST_HEAD(&ibm->all_drivers);
7532
7533 if (ibm->flags.experimental && !experimental)
7534 return 0;
7535
7536 dbg_printk(TPACPI_DBG_INIT,
7537 "probing for %s\n", ibm->name);
7538
7539 if (iibm->init) {
7540 ret = iibm->init(iibm);
7541 if (ret > 0)
7542 return 0; /* probe failed */
7543 if (ret)
7544 return ret;
7545
7546 ibm->flags.init_called = 1;
7547 }
7548
7549 if (ibm->acpi) {
7550 if (ibm->acpi->hid) {
7551 ret = register_tpacpi_subdriver(ibm);
7552 if (ret)
7553 goto err_out;
7554 }
7555
7556 if (ibm->acpi->notify) {
7557 ret = setup_acpi_notify(ibm);
7558 if (ret == -ENODEV) {
7559 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7560 ibm->name);
7561 ret = 0;
7562 goto err_out;
7563 }
7564 if (ret < 0)
7565 goto err_out;
7566 }
7567 }
7568
7569 dbg_printk(TPACPI_DBG_INIT,
7570 "%s installed\n", ibm->name);
7571
7572 if (ibm->read) {
7573 entry = create_proc_entry(ibm->name,
7574 S_IFREG | S_IRUGO | S_IWUSR,
7575 proc_dir);
7576 if (!entry) {
7577 printk(TPACPI_ERR "unable to create proc entry %s\n",
7578 ibm->name);
7579 ret = -ENODEV;
7580 goto err_out;
7581 }
7582 entry->data = ibm;
7583 entry->read_proc = &dispatch_procfs_read;
7584 if (ibm->write)
7585 entry->write_proc = &dispatch_procfs_write;
7586 ibm->flags.proc_created = 1;
7587 }
7588
7589 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7590
7591 return 0;
7592
7593 err_out:
7594 dbg_printk(TPACPI_DBG_INIT,
7595 "%s: at error exit path with result %d\n",
7596 ibm->name, ret);
7597
7598 ibm_exit(ibm);
7599 return (ret < 0)? ret : 0;
7600 }
7601
7602 /* Probing */
7603
7604 static bool __pure __init tpacpi_is_fw_digit(const char c)
7605 {
7606 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7607 }
7608
7609 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7610 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7611 const char t)
7612 {
7613 return s && strlen(s) >= 8 &&
7614 tpacpi_is_fw_digit(s[0]) &&
7615 tpacpi_is_fw_digit(s[1]) &&
7616 s[2] == t && s[3] == 'T' &&
7617 tpacpi_is_fw_digit(s[4]) &&
7618 tpacpi_is_fw_digit(s[5]) &&
7619 s[6] == 'W' && s[7] == 'W';
7620 }
7621
7622 /* returns 0 - probe ok, or < 0 - probe error.
7623 * Probe ok doesn't mean thinkpad found.
7624 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7625 static int __must_check __init get_thinkpad_model_data(
7626 struct thinkpad_id_data *tp)
7627 {
7628 const struct dmi_device *dev = NULL;
7629 char ec_fw_string[18];
7630 char const *s;
7631
7632 if (!tp)
7633 return -EINVAL;
7634
7635 memset(tp, 0, sizeof(*tp));
7636
7637 if (dmi_name_in_vendors("IBM"))
7638 tp->vendor = PCI_VENDOR_ID_IBM;
7639 else if (dmi_name_in_vendors("LENOVO"))
7640 tp->vendor = PCI_VENDOR_ID_LENOVO;
7641 else
7642 return 0;
7643
7644 s = dmi_get_system_info(DMI_BIOS_VERSION);
7645 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7646 if (s && !tp->bios_version_str)
7647 return -ENOMEM;
7648
7649 /* Really ancient ThinkPad 240X will fail this, which is fine */
7650 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7651 return 0;
7652
7653 tp->bios_model = tp->bios_version_str[0]
7654 | (tp->bios_version_str[1] << 8);
7655 tp->bios_release = (tp->bios_version_str[4] << 8)
7656 | tp->bios_version_str[5];
7657
7658 /*
7659 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7660 * X32 or newer, all Z series; Some models must have an
7661 * up-to-date BIOS or they will not be detected.
7662 *
7663 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7664 */
7665 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7666 if (sscanf(dev->name,
7667 "IBM ThinkPad Embedded Controller -[%17c",
7668 ec_fw_string) == 1) {
7669 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7670 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7671
7672 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7673 if (!tp->ec_version_str)
7674 return -ENOMEM;
7675
7676 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7677 tp->ec_model = ec_fw_string[0]
7678 | (ec_fw_string[1] << 8);
7679 tp->ec_release = (ec_fw_string[4] << 8)
7680 | ec_fw_string[5];
7681 } else {
7682 printk(TPACPI_NOTICE
7683 "ThinkPad firmware release %s "
7684 "doesn't match the known patterns\n",
7685 ec_fw_string);
7686 printk(TPACPI_NOTICE
7687 "please report this to %s\n",
7688 TPACPI_MAIL);
7689 }
7690 break;
7691 }
7692 }
7693
7694 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7695 if (s && !strnicmp(s, "ThinkPad", 8)) {
7696 tp->model_str = kstrdup(s, GFP_KERNEL);
7697 if (!tp->model_str)
7698 return -ENOMEM;
7699 }
7700
7701 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7702 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7703 if (s && !tp->nummodel_str)
7704 return -ENOMEM;
7705
7706 return 0;
7707 }
7708
7709 static int __init probe_for_thinkpad(void)
7710 {
7711 int is_thinkpad;
7712
7713 if (acpi_disabled)
7714 return -ENODEV;
7715
7716 /*
7717 * Non-ancient models have better DMI tagging, but very old models
7718 * don't. tpacpi_is_fw_known() is a cheat to help in that case.
7719 */
7720 is_thinkpad = (thinkpad_id.model_str != NULL) ||
7721 (thinkpad_id.ec_model != 0) ||
7722 tpacpi_is_fw_known();
7723
7724 /* ec is required because many other handles are relative to it */
7725 TPACPI_ACPIHANDLE_INIT(ec);
7726 if (!ec_handle) {
7727 if (is_thinkpad)
7728 printk(TPACPI_ERR
7729 "Not yet supported ThinkPad detected!\n");
7730 return -ENODEV;
7731 }
7732
7733 if (!is_thinkpad && !force_load)
7734 return -ENODEV;
7735
7736 return 0;
7737 }
7738
7739
7740 /* Module init, exit, parameters */
7741
7742 static struct ibm_init_struct ibms_init[] __initdata = {
7743 {
7744 .init = thinkpad_acpi_driver_init,
7745 .data = &thinkpad_acpi_driver_data,
7746 },
7747 {
7748 .init = hotkey_init,
7749 .data = &hotkey_driver_data,
7750 },
7751 {
7752 .init = bluetooth_init,
7753 .data = &bluetooth_driver_data,
7754 },
7755 {
7756 .init = wan_init,
7757 .data = &wan_driver_data,
7758 },
7759 {
7760 .init = uwb_init,
7761 .data = &uwb_driver_data,
7762 },
7763 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7764 {
7765 .init = video_init,
7766 .data = &video_driver_data,
7767 },
7768 #endif
7769 {
7770 .init = light_init,
7771 .data = &light_driver_data,
7772 },
7773 {
7774 .init = cmos_init,
7775 .data = &cmos_driver_data,
7776 },
7777 {
7778 .init = led_init,
7779 .data = &led_driver_data,
7780 },
7781 {
7782 .init = beep_init,
7783 .data = &beep_driver_data,
7784 },
7785 {
7786 .init = thermal_init,
7787 .data = &thermal_driver_data,
7788 },
7789 {
7790 .data = &ecdump_driver_data,
7791 },
7792 {
7793 .init = brightness_init,
7794 .data = &brightness_driver_data,
7795 },
7796 {
7797 .data = &volume_driver_data,
7798 },
7799 {
7800 .init = fan_init,
7801 .data = &fan_driver_data,
7802 },
7803 };
7804
7805 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7806 {
7807 unsigned int i;
7808 struct ibm_struct *ibm;
7809
7810 if (!kp || !kp->name || !val)
7811 return -EINVAL;
7812
7813 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7814 ibm = ibms_init[i].data;
7815 WARN_ON(ibm == NULL);
7816
7817 if (!ibm || !ibm->name)
7818 continue;
7819
7820 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7821 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7822 return -ENOSPC;
7823 strcpy(ibms_init[i].param, val);
7824 strcat(ibms_init[i].param, ",");
7825 return 0;
7826 }
7827 }
7828
7829 return -EINVAL;
7830 }
7831
7832 module_param(experimental, int, 0);
7833 MODULE_PARM_DESC(experimental,
7834 "Enables experimental features when non-zero");
7835
7836 module_param_named(debug, dbg_level, uint, 0);
7837 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7838
7839 module_param(force_load, bool, 0);
7840 MODULE_PARM_DESC(force_load,
7841 "Attempts to load the driver even on a "
7842 "mis-identified ThinkPad when true");
7843
7844 module_param_named(fan_control, fan_control_allowed, bool, 0);
7845 MODULE_PARM_DESC(fan_control,
7846 "Enables setting fan parameters features when true");
7847
7848 module_param_named(brightness_mode, brightness_mode, uint, 0);
7849 MODULE_PARM_DESC(brightness_mode,
7850 "Selects brightness control strategy: "
7851 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7852
7853 module_param(brightness_enable, uint, 0);
7854 MODULE_PARM_DESC(brightness_enable,
7855 "Enables backlight control when 1, disables when 0");
7856
7857 module_param(hotkey_report_mode, uint, 0);
7858 MODULE_PARM_DESC(hotkey_report_mode,
7859 "used for backwards compatibility with userspace, "
7860 "see documentation");
7861
7862 #define TPACPI_PARAM(feature) \
7863 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7864 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7865 "at module load, see documentation")
7866
7867 TPACPI_PARAM(hotkey);
7868 TPACPI_PARAM(bluetooth);
7869 TPACPI_PARAM(video);
7870 TPACPI_PARAM(light);
7871 TPACPI_PARAM(cmos);
7872 TPACPI_PARAM(led);
7873 TPACPI_PARAM(beep);
7874 TPACPI_PARAM(ecdump);
7875 TPACPI_PARAM(brightness);
7876 TPACPI_PARAM(volume);
7877 TPACPI_PARAM(fan);
7878
7879 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7880 module_param(dbg_wlswemul, uint, 0);
7881 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7882 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7883 MODULE_PARM_DESC(wlsw_state,
7884 "Initial state of the emulated WLSW switch");
7885
7886 module_param(dbg_bluetoothemul, uint, 0);
7887 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7888 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7889 MODULE_PARM_DESC(bluetooth_state,
7890 "Initial state of the emulated bluetooth switch");
7891
7892 module_param(dbg_wwanemul, uint, 0);
7893 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7894 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7895 MODULE_PARM_DESC(wwan_state,
7896 "Initial state of the emulated WWAN switch");
7897
7898 module_param(dbg_uwbemul, uint, 0);
7899 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7900 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7901 MODULE_PARM_DESC(uwb_state,
7902 "Initial state of the emulated UWB switch");
7903 #endif
7904
7905 static void thinkpad_acpi_module_exit(void)
7906 {
7907 struct ibm_struct *ibm, *itmp;
7908
7909 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7910
7911 list_for_each_entry_safe_reverse(ibm, itmp,
7912 &tpacpi_all_drivers,
7913 all_drivers) {
7914 ibm_exit(ibm);
7915 }
7916
7917 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7918
7919 if (tpacpi_inputdev) {
7920 if (tp_features.input_device_registered)
7921 input_unregister_device(tpacpi_inputdev);
7922 else
7923 input_free_device(tpacpi_inputdev);
7924 }
7925
7926 if (tpacpi_hwmon)
7927 hwmon_device_unregister(tpacpi_hwmon);
7928
7929 if (tp_features.sensors_pdev_attrs_registered)
7930 device_remove_file(&tpacpi_sensors_pdev->dev,
7931 &dev_attr_thinkpad_acpi_pdev_name);
7932 if (tpacpi_sensors_pdev)
7933 platform_device_unregister(tpacpi_sensors_pdev);
7934 if (tpacpi_pdev)
7935 platform_device_unregister(tpacpi_pdev);
7936
7937 if (tp_features.sensors_pdrv_attrs_registered)
7938 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7939 if (tp_features.platform_drv_attrs_registered)
7940 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7941
7942 if (tp_features.sensors_pdrv_registered)
7943 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7944
7945 if (tp_features.platform_drv_registered)
7946 platform_driver_unregister(&tpacpi_pdriver);
7947
7948 if (proc_dir)
7949 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7950
7951 if (tpacpi_wq)
7952 destroy_workqueue(tpacpi_wq);
7953
7954 kfree(thinkpad_id.bios_version_str);
7955 kfree(thinkpad_id.ec_version_str);
7956 kfree(thinkpad_id.model_str);
7957 }
7958
7959
7960 static int __init thinkpad_acpi_module_init(void)
7961 {
7962 int ret, i;
7963
7964 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7965
7966 /* Parameter checking */
7967 if (hotkey_report_mode > 2)
7968 return -EINVAL;
7969
7970 /* Driver-level probe */
7971
7972 ret = get_thinkpad_model_data(&thinkpad_id);
7973 if (ret) {
7974 printk(TPACPI_ERR
7975 "unable to get DMI data: %d\n", ret);
7976 thinkpad_acpi_module_exit();
7977 return ret;
7978 }
7979 ret = probe_for_thinkpad();
7980 if (ret) {
7981 thinkpad_acpi_module_exit();
7982 return ret;
7983 }
7984
7985 /* Driver initialization */
7986
7987 TPACPI_ACPIHANDLE_INIT(ecrd);
7988 TPACPI_ACPIHANDLE_INIT(ecwr);
7989
7990 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7991 if (!tpacpi_wq) {
7992 thinkpad_acpi_module_exit();
7993 return -ENOMEM;
7994 }
7995
7996 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7997 if (!proc_dir) {
7998 printk(TPACPI_ERR
7999 "unable to create proc dir " TPACPI_PROC_DIR);
8000 thinkpad_acpi_module_exit();
8001 return -ENODEV;
8002 }
8003
8004 ret = platform_driver_register(&tpacpi_pdriver);
8005 if (ret) {
8006 printk(TPACPI_ERR
8007 "unable to register main platform driver\n");
8008 thinkpad_acpi_module_exit();
8009 return ret;
8010 }
8011 tp_features.platform_drv_registered = 1;
8012
8013 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8014 if (ret) {
8015 printk(TPACPI_ERR
8016 "unable to register hwmon platform driver\n");
8017 thinkpad_acpi_module_exit();
8018 return ret;
8019 }
8020 tp_features.sensors_pdrv_registered = 1;
8021
8022 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8023 if (!ret) {
8024 tp_features.platform_drv_attrs_registered = 1;
8025 ret = tpacpi_create_driver_attributes(
8026 &tpacpi_hwmon_pdriver.driver);
8027 }
8028 if (ret) {
8029 printk(TPACPI_ERR
8030 "unable to create sysfs driver attributes\n");
8031 thinkpad_acpi_module_exit();
8032 return ret;
8033 }
8034 tp_features.sensors_pdrv_attrs_registered = 1;
8035
8036
8037 /* Device initialization */
8038 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8039 NULL, 0);
8040 if (IS_ERR(tpacpi_pdev)) {
8041 ret = PTR_ERR(tpacpi_pdev);
8042 tpacpi_pdev = NULL;
8043 printk(TPACPI_ERR "unable to register platform device\n");
8044 thinkpad_acpi_module_exit();
8045 return ret;
8046 }
8047 tpacpi_sensors_pdev = platform_device_register_simple(
8048 TPACPI_HWMON_DRVR_NAME,
8049 -1, NULL, 0);
8050 if (IS_ERR(tpacpi_sensors_pdev)) {
8051 ret = PTR_ERR(tpacpi_sensors_pdev);
8052 tpacpi_sensors_pdev = NULL;
8053 printk(TPACPI_ERR
8054 "unable to register hwmon platform device\n");
8055 thinkpad_acpi_module_exit();
8056 return ret;
8057 }
8058 ret = device_create_file(&tpacpi_sensors_pdev->dev,
8059 &dev_attr_thinkpad_acpi_pdev_name);
8060 if (ret) {
8061 printk(TPACPI_ERR
8062 "unable to create sysfs hwmon device attributes\n");
8063 thinkpad_acpi_module_exit();
8064 return ret;
8065 }
8066 tp_features.sensors_pdev_attrs_registered = 1;
8067 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8068 if (IS_ERR(tpacpi_hwmon)) {
8069 ret = PTR_ERR(tpacpi_hwmon);
8070 tpacpi_hwmon = NULL;
8071 printk(TPACPI_ERR "unable to register hwmon device\n");
8072 thinkpad_acpi_module_exit();
8073 return ret;
8074 }
8075 mutex_init(&tpacpi_inputdev_send_mutex);
8076 tpacpi_inputdev = input_allocate_device();
8077 if (!tpacpi_inputdev) {
8078 printk(TPACPI_ERR "unable to allocate input device\n");
8079 thinkpad_acpi_module_exit();
8080 return -ENOMEM;
8081 } else {
8082 /* Prepare input device, but don't register */
8083 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8084 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8085 tpacpi_inputdev->id.bustype = BUS_HOST;
8086 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8087 thinkpad_id.vendor :
8088 PCI_VENDOR_ID_IBM;
8089 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8090 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8091 }
8092 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8093 ret = ibm_init(&ibms_init[i]);
8094 if (ret >= 0 && *ibms_init[i].param)
8095 ret = ibms_init[i].data->write(ibms_init[i].param);
8096 if (ret < 0) {
8097 thinkpad_acpi_module_exit();
8098 return ret;
8099 }
8100 }
8101 ret = input_register_device(tpacpi_inputdev);
8102 if (ret < 0) {
8103 printk(TPACPI_ERR "unable to register input device\n");
8104 thinkpad_acpi_module_exit();
8105 return ret;
8106 } else {
8107 tp_features.input_device_registered = 1;
8108 }
8109
8110 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8111 return 0;
8112 }
8113
8114 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8115
8116 /*
8117 * This will autoload the driver in almost every ThinkPad
8118 * in widespread use.
8119 *
8120 * Only _VERY_ old models, like the 240, 240x and 570 lack
8121 * the HKEY event interface.
8122 */
8123 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8124
8125 /*
8126 * DMI matching for module autoloading
8127 *
8128 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8129 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8130 *
8131 * Only models listed in thinkwiki will be supported, so add yours
8132 * if it is not there yet.
8133 */
8134 #define IBM_BIOS_MODULE_ALIAS(__type) \
8135 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8136
8137 /* Ancient thinkpad BIOSes have to be identified by
8138 * BIOS type or model number, and there are far less
8139 * BIOS types than model numbers... */
8140 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */
8141
8142 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8143 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8144 MODULE_DESCRIPTION(TPACPI_DESC);
8145 MODULE_VERSION(TPACPI_VERSION);
8146 MODULE_LICENSE("GPL");
8147
8148 module_init(thinkpad_acpi_module_init);
8149 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree