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thinkpad-acpi: restrict access to some firmware LEDs
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blobca87f790c6a83d40e85303d58b9767d0bede0910
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 "0.22"
25 #define TPACPI_SYSFS_VERSION 0x020300
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 /* rfkill switches */
170 enum {
171 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
172 TPACPI_RFK_WWAN_SW_ID,
173 TPACPI_RFK_UWB_SW_ID,
174 };
175
176 /* printk headers */
177 #define TPACPI_LOG TPACPI_FILE ": "
178 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
179 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
180 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
181 #define TPACPI_ERR KERN_ERR TPACPI_LOG
182 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
183 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
184 #define TPACPI_INFO KERN_INFO TPACPI_LOG
185 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
186
187 /* Debugging printk groups */
188 #define TPACPI_DBG_ALL 0xffff
189 #define TPACPI_DBG_DISCLOSETASK 0x8000
190 #define TPACPI_DBG_INIT 0x0001
191 #define TPACPI_DBG_EXIT 0x0002
192
193 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
194 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
195 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
196
197
198 /****************************************************************************
199 * Driver-wide structs and misc. variables
200 */
201
202 struct ibm_struct;
203
204 struct tp_acpi_drv_struct {
205 const struct acpi_device_id *hid;
206 struct acpi_driver *driver;
207
208 void (*notify) (struct ibm_struct *, u32);
209 acpi_handle *handle;
210 u32 type;
211 struct acpi_device *device;
212 };
213
214 struct ibm_struct {
215 char *name;
216
217 int (*read) (char *);
218 int (*write) (char *);
219 void (*exit) (void);
220 void (*resume) (void);
221 void (*suspend) (pm_message_t state);
222 void (*shutdown) (void);
223
224 struct list_head all_drivers;
225
226 struct tp_acpi_drv_struct *acpi;
227
228 struct {
229 u8 acpi_driver_registered:1;
230 u8 acpi_notify_installed:1;
231 u8 proc_created:1;
232 u8 init_called:1;
233 u8 experimental:1;
234 } flags;
235 };
236
237 struct ibm_init_struct {
238 char param[32];
239
240 int (*init) (struct ibm_init_struct *);
241 struct ibm_struct *data;
242 };
243
244 static struct {
245 #ifdef CONFIG_THINKPAD_ACPI_BAY
246 u32 bay_status:1;
247 u32 bay_eject:1;
248 u32 bay_status2:1;
249 u32 bay_eject2:1;
250 #endif
251 u32 bluetooth:1;
252 u32 hotkey:1;
253 u32 hotkey_mask:1;
254 u32 hotkey_wlsw:1;
255 u32 hotkey_tablet:1;
256 u32 light:1;
257 u32 light_status:1;
258 u32 bright_16levels:1;
259 u32 bright_acpimode:1;
260 u32 wan:1;
261 u32 uwb:1;
262 u32 fan_ctrl_status_undef:1;
263 u32 input_device_registered:1;
264 u32 platform_drv_registered:1;
265 u32 platform_drv_attrs_registered:1;
266 u32 sensors_pdrv_registered:1;
267 u32 sensors_pdrv_attrs_registered:1;
268 u32 sensors_pdev_attrs_registered:1;
269 u32 hotkey_poll_active:1;
270 } tp_features;
271
272 static struct {
273 u16 hotkey_mask_ff:1;
274 u16 bright_cmos_ec_unsync:1;
275 } tp_warned;
276
277 struct thinkpad_id_data {
278 unsigned int vendor; /* ThinkPad vendor:
279 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
280
281 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
282 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
283
284 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
285 u16 ec_model;
286
287 char *model_str; /* ThinkPad T43 */
288 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
289 };
290 static struct thinkpad_id_data thinkpad_id;
291
292 static enum {
293 TPACPI_LIFE_INIT = 0,
294 TPACPI_LIFE_RUNNING,
295 TPACPI_LIFE_EXITING,
296 } tpacpi_lifecycle;
297
298 static int experimental;
299 static u32 dbg_level;
300
301 static struct workqueue_struct *tpacpi_wq;
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_brightness new_brightness;
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 ****************************************************************************
358 *
359 * ACPI Helpers and device model
360 *
361 ****************************************************************************
362 ****************************************************************************/
363
364 /*************************************************************************
365 * ACPI basic handles
366 */
367
368 static acpi_handle root_handle;
369
370 #define TPACPI_HANDLE(object, parent, paths...) \
371 static acpi_handle object##_handle; \
372 static acpi_handle *object##_parent = &parent##_handle; \
373 static char *object##_path; \
374 static char *object##_paths[] = { paths }
375
376 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
377 "\\_SB.PCI.ISA.EC", /* 570 */
378 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
379 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
380 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
381 "\\_SB.PCI0.ICH3.EC0", /* R31 */
382 "\\_SB.PCI0.LPC.EC", /* all others */
383 );
384
385 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
386 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
387
388 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
389 /* T4x, X31, X40 */
390 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
391 "\\CMS", /* R40, R40e */
392 ); /* all others */
393
394 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
395 "^HKEY", /* R30, R31 */
396 "HKEY", /* all others */
397 ); /* 570 */
398
399 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
400 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
401 "\\_SB.PCI0.VID0", /* 770e */
402 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
403 "\\_SB.PCI0.AGP.VID", /* all others */
404 ); /* R30, R31 */
405
406
407 /*************************************************************************
408 * ACPI helpers
409 */
410
411 static int acpi_evalf(acpi_handle handle,
412 void *res, char *method, char *fmt, ...)
413 {
414 char *fmt0 = fmt;
415 struct acpi_object_list params;
416 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
417 struct acpi_buffer result, *resultp;
418 union acpi_object out_obj;
419 acpi_status status;
420 va_list ap;
421 char res_type;
422 int success;
423 int quiet;
424
425 if (!*fmt) {
426 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
427 return 0;
428 }
429
430 if (*fmt == 'q') {
431 quiet = 1;
432 fmt++;
433 } else
434 quiet = 0;
435
436 res_type = *(fmt++);
437
438 params.count = 0;
439 params.pointer = &in_objs[0];
440
441 va_start(ap, fmt);
442 while (*fmt) {
443 char c = *(fmt++);
444 switch (c) {
445 case 'd': /* int */
446 in_objs[params.count].integer.value = va_arg(ap, int);
447 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
448 break;
449 /* add more types as needed */
450 default:
451 printk(TPACPI_ERR "acpi_evalf() called "
452 "with invalid format character '%c'\n", c);
453 return 0;
454 }
455 }
456 va_end(ap);
457
458 if (res_type != 'v') {
459 result.length = sizeof(out_obj);
460 result.pointer = &out_obj;
461 resultp = &result;
462 } else
463 resultp = NULL;
464
465 status = acpi_evaluate_object(handle, method, &params, resultp);
466
467 switch (res_type) {
468 case 'd': /* int */
469 if (res)
470 *(int *)res = out_obj.integer.value;
471 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
472 break;
473 case 'v': /* void */
474 success = status == AE_OK;
475 break;
476 /* add more types as needed */
477 default:
478 printk(TPACPI_ERR "acpi_evalf() called "
479 "with invalid format character '%c'\n", res_type);
480 return 0;
481 }
482
483 if (!success && !quiet)
484 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
485 method, fmt0, status);
486
487 return success;
488 }
489
490 static int acpi_ec_read(int i, u8 *p)
491 {
492 int v;
493
494 if (ecrd_handle) {
495 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
496 return 0;
497 *p = v;
498 } else {
499 if (ec_read(i, p) < 0)
500 return 0;
501 }
502
503 return 1;
504 }
505
506 static int acpi_ec_write(int i, u8 v)
507 {
508 if (ecwr_handle) {
509 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
510 return 0;
511 } else {
512 if (ec_write(i, v) < 0)
513 return 0;
514 }
515
516 return 1;
517 }
518
519 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
520 static int _sta(acpi_handle handle)
521 {
522 int status;
523
524 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
525 status = 0;
526
527 return status;
528 }
529 #endif
530
531 static int issue_thinkpad_cmos_command(int cmos_cmd)
532 {
533 if (!cmos_handle)
534 return -ENXIO;
535
536 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
537 return -EIO;
538
539 return 0;
540 }
541
542 /*************************************************************************
543 * ACPI device model
544 */
545
546 #define TPACPI_ACPIHANDLE_INIT(object) \
547 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
548 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
549
550 static void drv_acpi_handle_init(char *name,
551 acpi_handle *handle, acpi_handle parent,
552 char **paths, int num_paths, char **path)
553 {
554 int i;
555 acpi_status status;
556
557 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
558 name);
559
560 for (i = 0; i < num_paths; i++) {
561 status = acpi_get_handle(parent, paths[i], handle);
562 if (ACPI_SUCCESS(status)) {
563 *path = paths[i];
564 dbg_printk(TPACPI_DBG_INIT,
565 "Found ACPI handle %s for %s\n",
566 *path, name);
567 return;
568 }
569 }
570
571 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
572 name);
573 *handle = NULL;
574 }
575
576 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
577 {
578 struct ibm_struct *ibm = data;
579
580 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
581 return;
582
583 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
584 return;
585
586 ibm->acpi->notify(ibm, event);
587 }
588
589 static int __init setup_acpi_notify(struct ibm_struct *ibm)
590 {
591 acpi_status status;
592 int rc;
593
594 BUG_ON(!ibm->acpi);
595
596 if (!*ibm->acpi->handle)
597 return 0;
598
599 vdbg_printk(TPACPI_DBG_INIT,
600 "setting up ACPI notify for %s\n", ibm->name);
601
602 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
603 if (rc < 0) {
604 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
605 ibm->name, rc);
606 return -ENODEV;
607 }
608
609 acpi_driver_data(ibm->acpi->device) = ibm;
610 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
611 TPACPI_ACPI_EVENT_PREFIX,
612 ibm->name);
613
614 status = acpi_install_notify_handler(*ibm->acpi->handle,
615 ibm->acpi->type, dispatch_acpi_notify, ibm);
616 if (ACPI_FAILURE(status)) {
617 if (status == AE_ALREADY_EXISTS) {
618 printk(TPACPI_NOTICE
619 "another device driver is already "
620 "handling %s events\n", ibm->name);
621 } else {
622 printk(TPACPI_ERR
623 "acpi_install_notify_handler(%s) failed: %d\n",
624 ibm->name, status);
625 }
626 return -ENODEV;
627 }
628 ibm->flags.acpi_notify_installed = 1;
629 return 0;
630 }
631
632 static int __init tpacpi_device_add(struct acpi_device *device)
633 {
634 return 0;
635 }
636
637 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
638 {
639 int rc;
640
641 dbg_printk(TPACPI_DBG_INIT,
642 "registering %s as an ACPI driver\n", ibm->name);
643
644 BUG_ON(!ibm->acpi);
645
646 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
647 if (!ibm->acpi->driver) {
648 printk(TPACPI_ERR
649 "failed to allocate memory for ibm->acpi->driver\n");
650 return -ENOMEM;
651 }
652
653 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
654 ibm->acpi->driver->ids = ibm->acpi->hid;
655
656 ibm->acpi->driver->ops.add = &tpacpi_device_add;
657
658 rc = acpi_bus_register_driver(ibm->acpi->driver);
659 if (rc < 0) {
660 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
661 ibm->name, rc);
662 kfree(ibm->acpi->driver);
663 ibm->acpi->driver = NULL;
664 } else if (!rc)
665 ibm->flags.acpi_driver_registered = 1;
666
667 return rc;
668 }
669
670
671 /****************************************************************************
672 ****************************************************************************
673 *
674 * Procfs Helpers
675 *
676 ****************************************************************************
677 ****************************************************************************/
678
679 static int dispatch_procfs_read(char *page, char **start, off_t off,
680 int count, int *eof, void *data)
681 {
682 struct ibm_struct *ibm = data;
683 int len;
684
685 if (!ibm || !ibm->read)
686 return -EINVAL;
687
688 len = ibm->read(page);
689 if (len < 0)
690 return len;
691
692 if (len <= off + count)
693 *eof = 1;
694 *start = page + off;
695 len -= off;
696 if (len > count)
697 len = count;
698 if (len < 0)
699 len = 0;
700
701 return len;
702 }
703
704 static int dispatch_procfs_write(struct file *file,
705 const char __user *userbuf,
706 unsigned long count, void *data)
707 {
708 struct ibm_struct *ibm = data;
709 char *kernbuf;
710 int ret;
711
712 if (!ibm || !ibm->write)
713 return -EINVAL;
714
715 kernbuf = kmalloc(count + 2, GFP_KERNEL);
716 if (!kernbuf)
717 return -ENOMEM;
718
719 if (copy_from_user(kernbuf, userbuf, count)) {
720 kfree(kernbuf);
721 return -EFAULT;
722 }
723
724 kernbuf[count] = 0;
725 strcat(kernbuf, ",");
726 ret = ibm->write(kernbuf);
727 if (ret == 0)
728 ret = count;
729
730 kfree(kernbuf);
731
732 return ret;
733 }
734
735 static char *next_cmd(char **cmds)
736 {
737 char *start = *cmds;
738 char *end;
739
740 while ((end = strchr(start, ',')) && end == start)
741 start = end + 1;
742
743 if (!end)
744 return NULL;
745
746 *end = 0;
747 *cmds = end + 1;
748 return start;
749 }
750
751
752 /****************************************************************************
753 ****************************************************************************
754 *
755 * Device model: input, hwmon and platform
756 *
757 ****************************************************************************
758 ****************************************************************************/
759
760 static struct platform_device *tpacpi_pdev;
761 static struct platform_device *tpacpi_sensors_pdev;
762 static struct device *tpacpi_hwmon;
763 static struct input_dev *tpacpi_inputdev;
764 static struct mutex tpacpi_inputdev_send_mutex;
765 static LIST_HEAD(tpacpi_all_drivers);
766
767 static int tpacpi_suspend_handler(struct platform_device *pdev,
768 pm_message_t state)
769 {
770 struct ibm_struct *ibm, *itmp;
771
772 list_for_each_entry_safe(ibm, itmp,
773 &tpacpi_all_drivers,
774 all_drivers) {
775 if (ibm->suspend)
776 (ibm->suspend)(state);
777 }
778
779 return 0;
780 }
781
782 static int tpacpi_resume_handler(struct platform_device *pdev)
783 {
784 struct ibm_struct *ibm, *itmp;
785
786 list_for_each_entry_safe(ibm, itmp,
787 &tpacpi_all_drivers,
788 all_drivers) {
789 if (ibm->resume)
790 (ibm->resume)();
791 }
792
793 return 0;
794 }
795
796 static void tpacpi_shutdown_handler(struct platform_device *pdev)
797 {
798 struct ibm_struct *ibm, *itmp;
799
800 list_for_each_entry_safe(ibm, itmp,
801 &tpacpi_all_drivers,
802 all_drivers) {
803 if (ibm->shutdown)
804 (ibm->shutdown)();
805 }
806 }
807
808 static struct platform_driver tpacpi_pdriver = {
809 .driver = {
810 .name = TPACPI_DRVR_NAME,
811 .owner = THIS_MODULE,
812 },
813 .suspend = tpacpi_suspend_handler,
814 .resume = tpacpi_resume_handler,
815 .shutdown = tpacpi_shutdown_handler,
816 };
817
818 static struct platform_driver tpacpi_hwmon_pdriver = {
819 .driver = {
820 .name = TPACPI_HWMON_DRVR_NAME,
821 .owner = THIS_MODULE,
822 },
823 };
824
825 /*************************************************************************
826 * sysfs support helpers
827 */
828
829 struct attribute_set {
830 unsigned int members, max_members;
831 struct attribute_group group;
832 };
833
834 struct attribute_set_obj {
835 struct attribute_set s;
836 struct attribute *a;
837 } __attribute__((packed));
838
839 static struct attribute_set *create_attr_set(unsigned int max_members,
840 const char *name)
841 {
842 struct attribute_set_obj *sobj;
843
844 if (max_members == 0)
845 return NULL;
846
847 /* Allocates space for implicit NULL at the end too */
848 sobj = kzalloc(sizeof(struct attribute_set_obj) +
849 max_members * sizeof(struct attribute *),
850 GFP_KERNEL);
851 if (!sobj)
852 return NULL;
853 sobj->s.max_members = max_members;
854 sobj->s.group.attrs = &sobj->a;
855 sobj->s.group.name = name;
856
857 return &sobj->s;
858 }
859
860 #define destroy_attr_set(_set) \
861 kfree(_set);
862
863 /* not multi-threaded safe, use it in a single thread per set */
864 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
865 {
866 if (!s || !attr)
867 return -EINVAL;
868
869 if (s->members >= s->max_members)
870 return -ENOMEM;
871
872 s->group.attrs[s->members] = attr;
873 s->members++;
874
875 return 0;
876 }
877
878 static int add_many_to_attr_set(struct attribute_set *s,
879 struct attribute **attr,
880 unsigned int count)
881 {
882 int i, res;
883
884 for (i = 0; i < count; i++) {
885 res = add_to_attr_set(s, attr[i]);
886 if (res)
887 return res;
888 }
889
890 return 0;
891 }
892
893 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
894 {
895 sysfs_remove_group(kobj, &s->group);
896 destroy_attr_set(s);
897 }
898
899 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
900 sysfs_create_group(_kobj, &_attr_set->group)
901
902 static int parse_strtoul(const char *buf,
903 unsigned long max, unsigned long *value)
904 {
905 char *endp;
906
907 while (*buf && isspace(*buf))
908 buf++;
909 *value = simple_strtoul(buf, &endp, 0);
910 while (*endp && isspace(*endp))
911 endp++;
912 if (*endp || *value > max)
913 return -EINVAL;
914
915 return 0;
916 }
917
918 static void tpacpi_disable_brightness_delay(void)
919 {
920 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
921 printk(TPACPI_NOTICE
922 "ACPI backlight control delay disabled\n");
923 }
924
925 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
926 {
927 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
928 union acpi_object *obj;
929 int rc;
930
931 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
932 obj = (union acpi_object *)buffer.pointer;
933 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
934 printk(TPACPI_ERR "Unknown _BCL data, "
935 "please report this to %s\n", TPACPI_MAIL);
936 rc = 0;
937 } else {
938 rc = obj->package.count;
939 }
940 } else {
941 return 0;
942 }
943
944 kfree(buffer.pointer);
945 return rc;
946 }
947
948 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
949 u32 lvl, void *context, void **rv)
950 {
951 char name[ACPI_PATH_SEGMENT_LENGTH];
952 struct acpi_buffer buffer = { sizeof(name), &name };
953
954 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
955 !strncmp("_BCL", name, sizeof(name) - 1)) {
956 BUG_ON(!rv || !*rv);
957 **(int **)rv = tpacpi_query_bcl_levels(handle);
958 return AE_CTRL_TERMINATE;
959 } else {
960 return AE_OK;
961 }
962 }
963
964 /*
965 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
966 */
967 static int __init tpacpi_check_std_acpi_brightness_support(void)
968 {
969 int status;
970 int bcl_levels = 0;
971 void *bcl_ptr = &bcl_levels;
972
973 if (!vid_handle) {
974 TPACPI_ACPIHANDLE_INIT(vid);
975 }
976 if (!vid_handle)
977 return 0;
978
979 /*
980 * Search for a _BCL method, and execute it. This is safe on all
981 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
982 * BIOS in ACPI backlight control mode. We do NOT have to care
983 * about calling the _BCL method in an enabled video device, any
984 * will do for our purposes.
985 */
986
987 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
988 tpacpi_acpi_walk_find_bcl, NULL,
989 &bcl_ptr);
990
991 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
992 tp_features.bright_acpimode = 1;
993 return (bcl_levels - 2);
994 }
995
996 return 0;
997 }
998
999 static int __init tpacpi_new_rfkill(const unsigned int id,
1000 struct rfkill **rfk,
1001 const enum rfkill_type rfktype,
1002 const char *name,
1003 const bool set_default,
1004 int (*toggle_radio)(void *, enum rfkill_state),
1005 int (*get_state)(void *, enum rfkill_state *))
1006 {
1007 int res;
1008 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
1009
1010 res = get_state(NULL, &initial_state);
1011 if (res < 0) {
1012 printk(TPACPI_ERR
1013 "failed to read initial state for %s, error %d; "
1014 "will turn radio off\n", name, res);
1015 } else if (set_default) {
1016 /* try to set the initial state as the default for the rfkill
1017 * type, since we ask the firmware to preserve it across S5 in
1018 * NVRAM */
1019 rfkill_set_default(rfktype,
1020 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1021 RFKILL_STATE_UNBLOCKED :
1022 RFKILL_STATE_SOFT_BLOCKED);
1023 }
1024
1025 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1026 if (!*rfk) {
1027 printk(TPACPI_ERR
1028 "failed to allocate memory for rfkill class\n");
1029 return -ENOMEM;
1030 }
1031
1032 (*rfk)->name = name;
1033 (*rfk)->get_state = get_state;
1034 (*rfk)->toggle_radio = toggle_radio;
1035 (*rfk)->state = initial_state;
1036
1037 res = rfkill_register(*rfk);
1038 if (res < 0) {
1039 printk(TPACPI_ERR
1040 "failed to register %s rfkill switch: %d\n",
1041 name, res);
1042 rfkill_free(*rfk);
1043 *rfk = NULL;
1044 return res;
1045 }
1046
1047 return 0;
1048 }
1049
1050 static void printk_deprecated_attribute(const char * const what,
1051 const char * const details)
1052 {
1053 tpacpi_log_usertask("deprecated sysfs attribute");
1054 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1055 "will be removed. %s\n",
1056 what, details);
1057 }
1058
1059 static void printk_deprecated_rfkill_attribute(const char * const what)
1060 {
1061 printk_deprecated_attribute(what,
1062 "Please switch to generic rfkill before year 2010");
1063 }
1064
1065 /*************************************************************************
1066 * thinkpad-acpi driver attributes
1067 */
1068
1069 /* interface_version --------------------------------------------------- */
1070 static ssize_t tpacpi_driver_interface_version_show(
1071 struct device_driver *drv,
1072 char *buf)
1073 {
1074 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1075 }
1076
1077 static DRIVER_ATTR(interface_version, S_IRUGO,
1078 tpacpi_driver_interface_version_show, NULL);
1079
1080 /* debug_level --------------------------------------------------------- */
1081 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1082 char *buf)
1083 {
1084 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1085 }
1086
1087 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1088 const char *buf, size_t count)
1089 {
1090 unsigned long t;
1091
1092 if (parse_strtoul(buf, 0xffff, &t))
1093 return -EINVAL;
1094
1095 dbg_level = t;
1096
1097 return count;
1098 }
1099
1100 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1101 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1102
1103 /* version ------------------------------------------------------------- */
1104 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1105 char *buf)
1106 {
1107 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1108 TPACPI_DESC, TPACPI_VERSION);
1109 }
1110
1111 static DRIVER_ATTR(version, S_IRUGO,
1112 tpacpi_driver_version_show, NULL);
1113
1114 /* --------------------------------------------------------------------- */
1115
1116 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1117
1118 static void tpacpi_send_radiosw_update(void);
1119
1120 /* wlsw_emulstate ------------------------------------------------------ */
1121 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1122 char *buf)
1123 {
1124 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1125 }
1126
1127 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1128 const char *buf, size_t count)
1129 {
1130 unsigned long t;
1131
1132 if (parse_strtoul(buf, 1, &t))
1133 return -EINVAL;
1134
1135 if (tpacpi_wlsw_emulstate != t) {
1136 tpacpi_wlsw_emulstate = !!t;
1137 tpacpi_send_radiosw_update();
1138 } else
1139 tpacpi_wlsw_emulstate = !!t;
1140
1141 return count;
1142 }
1143
1144 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1145 tpacpi_driver_wlsw_emulstate_show,
1146 tpacpi_driver_wlsw_emulstate_store);
1147
1148 /* bluetooth_emulstate ------------------------------------------------- */
1149 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1150 struct device_driver *drv,
1151 char *buf)
1152 {
1153 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1154 }
1155
1156 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1157 struct device_driver *drv,
1158 const char *buf, size_t count)
1159 {
1160 unsigned long t;
1161
1162 if (parse_strtoul(buf, 1, &t))
1163 return -EINVAL;
1164
1165 tpacpi_bluetooth_emulstate = !!t;
1166
1167 return count;
1168 }
1169
1170 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1171 tpacpi_driver_bluetooth_emulstate_show,
1172 tpacpi_driver_bluetooth_emulstate_store);
1173
1174 /* wwan_emulstate ------------------------------------------------- */
1175 static ssize_t tpacpi_driver_wwan_emulstate_show(
1176 struct device_driver *drv,
1177 char *buf)
1178 {
1179 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1180 }
1181
1182 static ssize_t tpacpi_driver_wwan_emulstate_store(
1183 struct device_driver *drv,
1184 const char *buf, size_t count)
1185 {
1186 unsigned long t;
1187
1188 if (parse_strtoul(buf, 1, &t))
1189 return -EINVAL;
1190
1191 tpacpi_wwan_emulstate = !!t;
1192
1193 return count;
1194 }
1195
1196 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1197 tpacpi_driver_wwan_emulstate_show,
1198 tpacpi_driver_wwan_emulstate_store);
1199
1200 /* uwb_emulstate ------------------------------------------------- */
1201 static ssize_t tpacpi_driver_uwb_emulstate_show(
1202 struct device_driver *drv,
1203 char *buf)
1204 {
1205 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1206 }
1207
1208 static ssize_t tpacpi_driver_uwb_emulstate_store(
1209 struct device_driver *drv,
1210 const char *buf, size_t count)
1211 {
1212 unsigned long t;
1213
1214 if (parse_strtoul(buf, 1, &t))
1215 return -EINVAL;
1216
1217 tpacpi_uwb_emulstate = !!t;
1218
1219 return count;
1220 }
1221
1222 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1223 tpacpi_driver_uwb_emulstate_show,
1224 tpacpi_driver_uwb_emulstate_store);
1225 #endif
1226
1227 /* --------------------------------------------------------------------- */
1228
1229 static struct driver_attribute *tpacpi_driver_attributes[] = {
1230 &driver_attr_debug_level, &driver_attr_version,
1231 &driver_attr_interface_version,
1232 };
1233
1234 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1235 {
1236 int i, res;
1237
1238 i = 0;
1239 res = 0;
1240 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1241 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1242 i++;
1243 }
1244
1245 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1246 if (!res && dbg_wlswemul)
1247 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1248 if (!res && dbg_bluetoothemul)
1249 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1250 if (!res && dbg_wwanemul)
1251 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1252 if (!res && dbg_uwbemul)
1253 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1254 #endif
1255
1256 return res;
1257 }
1258
1259 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1260 {
1261 int i;
1262
1263 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1264 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1265
1266 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1267 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1268 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1269 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1270 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1271 #endif
1272 }
1273
1274 /****************************************************************************
1275 ****************************************************************************
1276 *
1277 * Subdrivers
1278 *
1279 ****************************************************************************
1280 ****************************************************************************/
1281
1282 /*************************************************************************
1283 * thinkpad-acpi init subdriver
1284 */
1285
1286 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1287 {
1288 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1289 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1290
1291 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1292 (thinkpad_id.bios_version_str) ?
1293 thinkpad_id.bios_version_str : "unknown",
1294 (thinkpad_id.ec_version_str) ?
1295 thinkpad_id.ec_version_str : "unknown");
1296
1297 if (thinkpad_id.vendor && thinkpad_id.model_str)
1298 printk(TPACPI_INFO "%s %s, model %s\n",
1299 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1300 "IBM" : ((thinkpad_id.vendor ==
1301 PCI_VENDOR_ID_LENOVO) ?
1302 "Lenovo" : "Unknown vendor"),
1303 thinkpad_id.model_str,
1304 (thinkpad_id.nummodel_str) ?
1305 thinkpad_id.nummodel_str : "unknown");
1306
1307 return 0;
1308 }
1309
1310 static int thinkpad_acpi_driver_read(char *p)
1311 {
1312 int len = 0;
1313
1314 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1315 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1316
1317 return len;
1318 }
1319
1320 static struct ibm_struct thinkpad_acpi_driver_data = {
1321 .name = "driver",
1322 .read = thinkpad_acpi_driver_read,
1323 };
1324
1325 /*************************************************************************
1326 * Hotkey subdriver
1327 */
1328
1329 enum { /* hot key scan codes (derived from ACPI DSDT) */
1330 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1331 TP_ACPI_HOTKEYSCAN_FNF2,
1332 TP_ACPI_HOTKEYSCAN_FNF3,
1333 TP_ACPI_HOTKEYSCAN_FNF4,
1334 TP_ACPI_HOTKEYSCAN_FNF5,
1335 TP_ACPI_HOTKEYSCAN_FNF6,
1336 TP_ACPI_HOTKEYSCAN_FNF7,
1337 TP_ACPI_HOTKEYSCAN_FNF8,
1338 TP_ACPI_HOTKEYSCAN_FNF9,
1339 TP_ACPI_HOTKEYSCAN_FNF10,
1340 TP_ACPI_HOTKEYSCAN_FNF11,
1341 TP_ACPI_HOTKEYSCAN_FNF12,
1342 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1343 TP_ACPI_HOTKEYSCAN_FNINSERT,
1344 TP_ACPI_HOTKEYSCAN_FNDELETE,
1345 TP_ACPI_HOTKEYSCAN_FNHOME,
1346 TP_ACPI_HOTKEYSCAN_FNEND,
1347 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1348 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1349 TP_ACPI_HOTKEYSCAN_FNSPACE,
1350 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1351 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1352 TP_ACPI_HOTKEYSCAN_MUTE,
1353 TP_ACPI_HOTKEYSCAN_THINKPAD,
1354 };
1355
1356 enum { /* Keys available through NVRAM polling */
1357 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1358 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1359 };
1360
1361 enum { /* Positions of some of the keys in hotkey masks */
1362 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1363 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1364 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1365 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1366 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1367 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1368 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1369 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1370 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1371 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1372 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1373 };
1374
1375 enum { /* NVRAM to ACPI HKEY group map */
1376 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1377 TP_ACPI_HKEY_ZOOM_MASK |
1378 TP_ACPI_HKEY_DISPSWTCH_MASK |
1379 TP_ACPI_HKEY_HIBERNATE_MASK,
1380 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1381 TP_ACPI_HKEY_BRGHTDWN_MASK,
1382 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1383 TP_ACPI_HKEY_VOLDWN_MASK |
1384 TP_ACPI_HKEY_MUTE_MASK,
1385 };
1386
1387 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1388 struct tp_nvram_state {
1389 u16 thinkpad_toggle:1;
1390 u16 zoom_toggle:1;
1391 u16 display_toggle:1;
1392 u16 thinklight_toggle:1;
1393 u16 hibernate_toggle:1;
1394 u16 displayexp_toggle:1;
1395 u16 display_state:1;
1396 u16 brightness_toggle:1;
1397 u16 volume_toggle:1;
1398 u16 mute:1;
1399
1400 u8 brightness_level;
1401 u8 volume_level;
1402 };
1403
1404 static struct task_struct *tpacpi_hotkey_task;
1405 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1406 static int hotkey_poll_freq = 10; /* Hz */
1407 static struct mutex hotkey_thread_mutex;
1408 static struct mutex hotkey_thread_data_mutex;
1409 static unsigned int hotkey_config_change;
1410
1411 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1412
1413 #define hotkey_source_mask 0U
1414
1415 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1416
1417 static struct mutex hotkey_mutex;
1418
1419 static enum { /* Reasons for waking up */
1420 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1421 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1422 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1423 } hotkey_wakeup_reason;
1424
1425 static int hotkey_autosleep_ack;
1426
1427 static u32 hotkey_orig_mask;
1428 static u32 hotkey_all_mask;
1429 static u32 hotkey_reserved_mask;
1430 static u32 hotkey_mask;
1431
1432 static unsigned int hotkey_report_mode;
1433
1434 static u16 *hotkey_keycode_map;
1435
1436 static struct attribute_set *hotkey_dev_attributes;
1437
1438 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1439 #define HOTKEY_CONFIG_CRITICAL_START \
1440 do { \
1441 mutex_lock(&hotkey_thread_data_mutex); \
1442 hotkey_config_change++; \
1443 } while (0);
1444 #define HOTKEY_CONFIG_CRITICAL_END \
1445 mutex_unlock(&hotkey_thread_data_mutex);
1446 #else
1447 #define HOTKEY_CONFIG_CRITICAL_START
1448 #define HOTKEY_CONFIG_CRITICAL_END
1449 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1450
1451 /* HKEY.MHKG() return bits */
1452 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1453
1454 static int hotkey_get_wlsw(int *status)
1455 {
1456 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1457 if (dbg_wlswemul) {
1458 *status = !!tpacpi_wlsw_emulstate;
1459 return 0;
1460 }
1461 #endif
1462 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1463 return -EIO;
1464 return 0;
1465 }
1466
1467 static int hotkey_get_tablet_mode(int *status)
1468 {
1469 int s;
1470
1471 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1472 return -EIO;
1473
1474 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1475 return 0;
1476 }
1477
1478 /*
1479 * Call with hotkey_mutex held
1480 */
1481 static int hotkey_mask_get(void)
1482 {
1483 u32 m = 0;
1484
1485 if (tp_features.hotkey_mask) {
1486 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1487 return -EIO;
1488 }
1489 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1490
1491 return 0;
1492 }
1493
1494 /*
1495 * Call with hotkey_mutex held
1496 */
1497 static int hotkey_mask_set(u32 mask)
1498 {
1499 int i;
1500 int rc = 0;
1501
1502 if (tp_features.hotkey_mask) {
1503 if (!tp_warned.hotkey_mask_ff &&
1504 (mask == 0xffff || mask == 0xffffff ||
1505 mask == 0xffffffff)) {
1506 tp_warned.hotkey_mask_ff = 1;
1507 printk(TPACPI_NOTICE
1508 "setting the hotkey mask to 0x%08x is likely "
1509 "not the best way to go about it\n", mask);
1510 printk(TPACPI_NOTICE
1511 "please consider using the driver defaults, "
1512 "and refer to up-to-date thinkpad-acpi "
1513 "documentation\n");
1514 }
1515
1516 HOTKEY_CONFIG_CRITICAL_START
1517 for (i = 0; i < 32; i++) {
1518 u32 m = 1 << i;
1519 /* enable in firmware mask only keys not in NVRAM
1520 * mode, but enable the key in the cached hotkey_mask
1521 * regardless of mode, or the key will end up
1522 * disabled by hotkey_mask_get() */
1523 if (!acpi_evalf(hkey_handle,
1524 NULL, "MHKM", "vdd", i + 1,
1525 !!((mask & ~hotkey_source_mask) & m))) {
1526 rc = -EIO;
1527 break;
1528 } else {
1529 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1530 }
1531 }
1532 HOTKEY_CONFIG_CRITICAL_END
1533
1534 /* hotkey_mask_get must be called unconditionally below */
1535 if (!hotkey_mask_get() && !rc &&
1536 (hotkey_mask & ~hotkey_source_mask) !=
1537 (mask & ~hotkey_source_mask)) {
1538 printk(TPACPI_NOTICE
1539 "requested hot key mask 0x%08x, but "
1540 "firmware forced it to 0x%08x\n",
1541 mask, hotkey_mask);
1542 }
1543 } else {
1544 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1545 HOTKEY_CONFIG_CRITICAL_START
1546 hotkey_mask = mask & hotkey_source_mask;
1547 HOTKEY_CONFIG_CRITICAL_END
1548 hotkey_mask_get();
1549 if (hotkey_mask != mask) {
1550 printk(TPACPI_NOTICE
1551 "requested hot key mask 0x%08x, "
1552 "forced to 0x%08x (NVRAM poll mask is "
1553 "0x%08x): no firmware mask support\n",
1554 mask, hotkey_mask, hotkey_source_mask);
1555 }
1556 #else
1557 hotkey_mask_get();
1558 rc = -ENXIO;
1559 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1560 }
1561
1562 return rc;
1563 }
1564
1565 static int hotkey_status_get(int *status)
1566 {
1567 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1568 return -EIO;
1569
1570 return 0;
1571 }
1572
1573 static int hotkey_status_set(bool enable)
1574 {
1575 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1576 return -EIO;
1577
1578 return 0;
1579 }
1580
1581 static void tpacpi_input_send_tabletsw(void)
1582 {
1583 int state;
1584
1585 if (tp_features.hotkey_tablet &&
1586 !hotkey_get_tablet_mode(&state)) {
1587 mutex_lock(&tpacpi_inputdev_send_mutex);
1588
1589 input_report_switch(tpacpi_inputdev,
1590 SW_TABLET_MODE, !!state);
1591 input_sync(tpacpi_inputdev);
1592
1593 mutex_unlock(&tpacpi_inputdev_send_mutex);
1594 }
1595 }
1596
1597 static void tpacpi_input_send_key(unsigned int scancode)
1598 {
1599 unsigned int keycode;
1600
1601 keycode = hotkey_keycode_map[scancode];
1602
1603 if (keycode != KEY_RESERVED) {
1604 mutex_lock(&tpacpi_inputdev_send_mutex);
1605
1606 input_report_key(tpacpi_inputdev, keycode, 1);
1607 if (keycode == KEY_UNKNOWN)
1608 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1609 scancode);
1610 input_sync(tpacpi_inputdev);
1611
1612 input_report_key(tpacpi_inputdev, keycode, 0);
1613 if (keycode == KEY_UNKNOWN)
1614 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1615 scancode);
1616 input_sync(tpacpi_inputdev);
1617
1618 mutex_unlock(&tpacpi_inputdev_send_mutex);
1619 }
1620 }
1621
1622 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1623 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1624
1625 static void tpacpi_hotkey_send_key(unsigned int scancode)
1626 {
1627 tpacpi_input_send_key(scancode);
1628 if (hotkey_report_mode < 2) {
1629 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1630 0x80, 0x1001 + scancode);
1631 }
1632 }
1633
1634 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1635 {
1636 u8 d;
1637
1638 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1639 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1640 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1641 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1642 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1643 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1644 }
1645 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1646 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1647 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1648 }
1649 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1650 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1651 n->displayexp_toggle =
1652 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1653 }
1654 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1655 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1656 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1657 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1658 n->brightness_toggle =
1659 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1660 }
1661 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1662 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1663 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1664 >> TP_NVRAM_POS_LEVEL_VOLUME;
1665 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1666 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1667 }
1668 }
1669
1670 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1671 do { \
1672 if ((mask & (1 << __scancode)) && \
1673 oldn->__member != newn->__member) \
1674 tpacpi_hotkey_send_key(__scancode); \
1675 } while (0)
1676
1677 #define TPACPI_MAY_SEND_KEY(__scancode) \
1678 do { if (mask & (1 << __scancode)) \
1679 tpacpi_hotkey_send_key(__scancode); } while (0)
1680
1681 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1682 struct tp_nvram_state *newn,
1683 u32 mask)
1684 {
1685 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1686 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1687 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1688 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1689
1690 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1691
1692 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1693
1694 /* handle volume */
1695 if (oldn->volume_toggle != newn->volume_toggle) {
1696 if (oldn->mute != newn->mute) {
1697 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1698 }
1699 if (oldn->volume_level > newn->volume_level) {
1700 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1701 } else if (oldn->volume_level < newn->volume_level) {
1702 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1703 } else if (oldn->mute == newn->mute) {
1704 /* repeated key presses that didn't change state */
1705 if (newn->mute) {
1706 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1707 } else if (newn->volume_level != 0) {
1708 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1709 } else {
1710 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1711 }
1712 }
1713 }
1714
1715 /* handle brightness */
1716 if (oldn->brightness_toggle != newn->brightness_toggle) {
1717 if (oldn->brightness_level < newn->brightness_level) {
1718 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1719 } else if (oldn->brightness_level > newn->brightness_level) {
1720 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1721 } else {
1722 /* repeated key presses that didn't change state */
1723 if (newn->brightness_level != 0) {
1724 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1725 } else {
1726 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1727 }
1728 }
1729 }
1730 }
1731
1732 #undef TPACPI_COMPARE_KEY
1733 #undef TPACPI_MAY_SEND_KEY
1734
1735 static int hotkey_kthread(void *data)
1736 {
1737 struct tp_nvram_state s[2];
1738 u32 mask;
1739 unsigned int si, so;
1740 unsigned long t;
1741 unsigned int change_detector, must_reset;
1742
1743 mutex_lock(&hotkey_thread_mutex);
1744
1745 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1746 goto exit;
1747
1748 set_freezable();
1749
1750 so = 0;
1751 si = 1;
1752 t = 0;
1753
1754 /* Initial state for compares */
1755 mutex_lock(&hotkey_thread_data_mutex);
1756 change_detector = hotkey_config_change;
1757 mask = hotkey_source_mask & hotkey_mask;
1758 mutex_unlock(&hotkey_thread_data_mutex);
1759 hotkey_read_nvram(&s[so], mask);
1760
1761 while (!kthread_should_stop() && hotkey_poll_freq) {
1762 if (t == 0)
1763 t = 1000/hotkey_poll_freq;
1764 t = msleep_interruptible(t);
1765 if (unlikely(kthread_should_stop()))
1766 break;
1767 must_reset = try_to_freeze();
1768 if (t > 0 && !must_reset)
1769 continue;
1770
1771 mutex_lock(&hotkey_thread_data_mutex);
1772 if (must_reset || hotkey_config_change != change_detector) {
1773 /* forget old state on thaw or config change */
1774 si = so;
1775 t = 0;
1776 change_detector = hotkey_config_change;
1777 }
1778 mask = hotkey_source_mask & hotkey_mask;
1779 mutex_unlock(&hotkey_thread_data_mutex);
1780
1781 if (likely(mask)) {
1782 hotkey_read_nvram(&s[si], mask);
1783 if (likely(si != so)) {
1784 hotkey_compare_and_issue_event(&s[so], &s[si],
1785 mask);
1786 }
1787 }
1788
1789 so = si;
1790 si ^= 1;
1791 }
1792
1793 exit:
1794 mutex_unlock(&hotkey_thread_mutex);
1795 return 0;
1796 }
1797
1798 static void hotkey_poll_stop_sync(void)
1799 {
1800 if (tpacpi_hotkey_task) {
1801 if (frozen(tpacpi_hotkey_task) ||
1802 freezing(tpacpi_hotkey_task))
1803 thaw_process(tpacpi_hotkey_task);
1804
1805 kthread_stop(tpacpi_hotkey_task);
1806 tpacpi_hotkey_task = NULL;
1807 mutex_lock(&hotkey_thread_mutex);
1808 /* at this point, the thread did exit */
1809 mutex_unlock(&hotkey_thread_mutex);
1810 }
1811 }
1812
1813 /* call with hotkey_mutex held */
1814 static void hotkey_poll_setup(int may_warn)
1815 {
1816 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1817 hotkey_poll_freq > 0 &&
1818 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1819 if (!tpacpi_hotkey_task) {
1820 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1821 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1822 if (IS_ERR(tpacpi_hotkey_task)) {
1823 tpacpi_hotkey_task = NULL;
1824 printk(TPACPI_ERR
1825 "could not create kernel thread "
1826 "for hotkey polling\n");
1827 }
1828 }
1829 } else {
1830 hotkey_poll_stop_sync();
1831 if (may_warn &&
1832 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1833 printk(TPACPI_NOTICE
1834 "hot keys 0x%08x require polling, "
1835 "which is currently disabled\n",
1836 hotkey_source_mask);
1837 }
1838 }
1839 }
1840
1841 static void hotkey_poll_setup_safe(int may_warn)
1842 {
1843 mutex_lock(&hotkey_mutex);
1844 hotkey_poll_setup(may_warn);
1845 mutex_unlock(&hotkey_mutex);
1846 }
1847
1848 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1849
1850 static void hotkey_poll_setup_safe(int __unused)
1851 {
1852 }
1853
1854 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1855
1856 static int hotkey_inputdev_open(struct input_dev *dev)
1857 {
1858 switch (tpacpi_lifecycle) {
1859 case TPACPI_LIFE_INIT:
1860 /*
1861 * hotkey_init will call hotkey_poll_setup_safe
1862 * at the appropriate moment
1863 */
1864 return 0;
1865 case TPACPI_LIFE_EXITING:
1866 return -EBUSY;
1867 case TPACPI_LIFE_RUNNING:
1868 hotkey_poll_setup_safe(0);
1869 return 0;
1870 }
1871
1872 /* Should only happen if tpacpi_lifecycle is corrupt */
1873 BUG();
1874 return -EBUSY;
1875 }
1876
1877 static void hotkey_inputdev_close(struct input_dev *dev)
1878 {
1879 /* disable hotkey polling when possible */
1880 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1881 hotkey_poll_setup_safe(0);
1882 }
1883
1884 /* sysfs hotkey enable ------------------------------------------------- */
1885 static ssize_t hotkey_enable_show(struct device *dev,
1886 struct device_attribute *attr,
1887 char *buf)
1888 {
1889 int res, status;
1890
1891 printk_deprecated_attribute("hotkey_enable",
1892 "Hotkey reporting is always enabled");
1893
1894 res = hotkey_status_get(&status);
1895 if (res)
1896 return res;
1897
1898 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1899 }
1900
1901 static ssize_t hotkey_enable_store(struct device *dev,
1902 struct device_attribute *attr,
1903 const char *buf, size_t count)
1904 {
1905 unsigned long t;
1906
1907 printk_deprecated_attribute("hotkey_enable",
1908 "Hotkeys can be disabled through hotkey_mask");
1909
1910 if (parse_strtoul(buf, 1, &t))
1911 return -EINVAL;
1912
1913 if (t == 0)
1914 return -EPERM;
1915
1916 return count;
1917 }
1918
1919 static struct device_attribute dev_attr_hotkey_enable =
1920 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1921 hotkey_enable_show, hotkey_enable_store);
1922
1923 /* sysfs hotkey mask --------------------------------------------------- */
1924 static ssize_t hotkey_mask_show(struct device *dev,
1925 struct device_attribute *attr,
1926 char *buf)
1927 {
1928 int res;
1929
1930 if (mutex_lock_killable(&hotkey_mutex))
1931 return -ERESTARTSYS;
1932 res = hotkey_mask_get();
1933 mutex_unlock(&hotkey_mutex);
1934
1935 return (res)?
1936 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1937 }
1938
1939 static ssize_t hotkey_mask_store(struct device *dev,
1940 struct device_attribute *attr,
1941 const char *buf, size_t count)
1942 {
1943 unsigned long t;
1944 int res;
1945
1946 if (parse_strtoul(buf, 0xffffffffUL, &t))
1947 return -EINVAL;
1948
1949 if (mutex_lock_killable(&hotkey_mutex))
1950 return -ERESTARTSYS;
1951
1952 res = hotkey_mask_set(t);
1953
1954 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1955 hotkey_poll_setup(1);
1956 #endif
1957
1958 mutex_unlock(&hotkey_mutex);
1959
1960 return (res) ? res : count;
1961 }
1962
1963 static struct device_attribute dev_attr_hotkey_mask =
1964 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1965 hotkey_mask_show, hotkey_mask_store);
1966
1967 /* sysfs hotkey bios_enabled ------------------------------------------- */
1968 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1969 struct device_attribute *attr,
1970 char *buf)
1971 {
1972 return sprintf(buf, "0\n");
1973 }
1974
1975 static struct device_attribute dev_attr_hotkey_bios_enabled =
1976 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1977
1978 /* sysfs hotkey bios_mask ---------------------------------------------- */
1979 static ssize_t hotkey_bios_mask_show(struct device *dev,
1980 struct device_attribute *attr,
1981 char *buf)
1982 {
1983 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1984 }
1985
1986 static struct device_attribute dev_attr_hotkey_bios_mask =
1987 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1988
1989 /* sysfs hotkey all_mask ----------------------------------------------- */
1990 static ssize_t hotkey_all_mask_show(struct device *dev,
1991 struct device_attribute *attr,
1992 char *buf)
1993 {
1994 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1995 hotkey_all_mask | hotkey_source_mask);
1996 }
1997
1998 static struct device_attribute dev_attr_hotkey_all_mask =
1999 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2000
2001 /* sysfs hotkey recommended_mask --------------------------------------- */
2002 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2003 struct device_attribute *attr,
2004 char *buf)
2005 {
2006 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2007 (hotkey_all_mask | hotkey_source_mask)
2008 & ~hotkey_reserved_mask);
2009 }
2010
2011 static struct device_attribute dev_attr_hotkey_recommended_mask =
2012 __ATTR(hotkey_recommended_mask, S_IRUGO,
2013 hotkey_recommended_mask_show, NULL);
2014
2015 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2016
2017 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2018 static ssize_t hotkey_source_mask_show(struct device *dev,
2019 struct device_attribute *attr,
2020 char *buf)
2021 {
2022 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2023 }
2024
2025 static ssize_t hotkey_source_mask_store(struct device *dev,
2026 struct device_attribute *attr,
2027 const char *buf, size_t count)
2028 {
2029 unsigned long t;
2030
2031 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2032 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2033 return -EINVAL;
2034
2035 if (mutex_lock_killable(&hotkey_mutex))
2036 return -ERESTARTSYS;
2037
2038 HOTKEY_CONFIG_CRITICAL_START
2039 hotkey_source_mask = t;
2040 HOTKEY_CONFIG_CRITICAL_END
2041
2042 hotkey_poll_setup(1);
2043
2044 mutex_unlock(&hotkey_mutex);
2045
2046 return count;
2047 }
2048
2049 static struct device_attribute dev_attr_hotkey_source_mask =
2050 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2051 hotkey_source_mask_show, hotkey_source_mask_store);
2052
2053 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2054 static ssize_t hotkey_poll_freq_show(struct device *dev,
2055 struct device_attribute *attr,
2056 char *buf)
2057 {
2058 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2059 }
2060
2061 static ssize_t hotkey_poll_freq_store(struct device *dev,
2062 struct device_attribute *attr,
2063 const char *buf, size_t count)
2064 {
2065 unsigned long t;
2066
2067 if (parse_strtoul(buf, 25, &t))
2068 return -EINVAL;
2069
2070 if (mutex_lock_killable(&hotkey_mutex))
2071 return -ERESTARTSYS;
2072
2073 hotkey_poll_freq = t;
2074
2075 hotkey_poll_setup(1);
2076 mutex_unlock(&hotkey_mutex);
2077
2078 return count;
2079 }
2080
2081 static struct device_attribute dev_attr_hotkey_poll_freq =
2082 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2083 hotkey_poll_freq_show, hotkey_poll_freq_store);
2084
2085 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2086
2087 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2088 static ssize_t hotkey_radio_sw_show(struct device *dev,
2089 struct device_attribute *attr,
2090 char *buf)
2091 {
2092 int res, s;
2093 res = hotkey_get_wlsw(&s);
2094 if (res < 0)
2095 return res;
2096
2097 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2098 }
2099
2100 static struct device_attribute dev_attr_hotkey_radio_sw =
2101 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2102
2103 static void hotkey_radio_sw_notify_change(void)
2104 {
2105 if (tp_features.hotkey_wlsw)
2106 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2107 "hotkey_radio_sw");
2108 }
2109
2110 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2111 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2112 struct device_attribute *attr,
2113 char *buf)
2114 {
2115 int res, s;
2116 res = hotkey_get_tablet_mode(&s);
2117 if (res < 0)
2118 return res;
2119
2120 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2121 }
2122
2123 static struct device_attribute dev_attr_hotkey_tablet_mode =
2124 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2125
2126 static void hotkey_tablet_mode_notify_change(void)
2127 {
2128 if (tp_features.hotkey_tablet)
2129 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2130 "hotkey_tablet_mode");
2131 }
2132
2133 /* sysfs hotkey report_mode -------------------------------------------- */
2134 static ssize_t hotkey_report_mode_show(struct device *dev,
2135 struct device_attribute *attr,
2136 char *buf)
2137 {
2138 return snprintf(buf, PAGE_SIZE, "%d\n",
2139 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2140 }
2141
2142 static struct device_attribute dev_attr_hotkey_report_mode =
2143 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2144
2145 /* sysfs wakeup reason (pollable) -------------------------------------- */
2146 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2147 struct device_attribute *attr,
2148 char *buf)
2149 {
2150 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2151 }
2152
2153 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2154 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2155
2156 static void hotkey_wakeup_reason_notify_change(void)
2157 {
2158 if (tp_features.hotkey_mask)
2159 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2160 "wakeup_reason");
2161 }
2162
2163 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2164 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2165 struct device_attribute *attr,
2166 char *buf)
2167 {
2168 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2169 }
2170
2171 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2172 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2173 hotkey_wakeup_hotunplug_complete_show, NULL);
2174
2175 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2176 {
2177 if (tp_features.hotkey_mask)
2178 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2179 "wakeup_hotunplug_complete");
2180 }
2181
2182 /* --------------------------------------------------------------------- */
2183
2184 static struct attribute *hotkey_attributes[] __initdata = {
2185 &dev_attr_hotkey_enable.attr,
2186 &dev_attr_hotkey_bios_enabled.attr,
2187 &dev_attr_hotkey_report_mode.attr,
2188 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2189 &dev_attr_hotkey_mask.attr,
2190 &dev_attr_hotkey_all_mask.attr,
2191 &dev_attr_hotkey_recommended_mask.attr,
2192 &dev_attr_hotkey_source_mask.attr,
2193 &dev_attr_hotkey_poll_freq.attr,
2194 #endif
2195 };
2196
2197 static struct attribute *hotkey_mask_attributes[] __initdata = {
2198 &dev_attr_hotkey_bios_mask.attr,
2199 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2200 &dev_attr_hotkey_mask.attr,
2201 &dev_attr_hotkey_all_mask.attr,
2202 &dev_attr_hotkey_recommended_mask.attr,
2203 #endif
2204 &dev_attr_hotkey_wakeup_reason.attr,
2205 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2206 };
2207
2208 static void bluetooth_update_rfk(void);
2209 static void wan_update_rfk(void);
2210 static void uwb_update_rfk(void);
2211 static void tpacpi_send_radiosw_update(void)
2212 {
2213 int wlsw;
2214
2215 /* Sync these BEFORE sending any rfkill events */
2216 if (tp_features.bluetooth)
2217 bluetooth_update_rfk();
2218 if (tp_features.wan)
2219 wan_update_rfk();
2220 if (tp_features.uwb)
2221 uwb_update_rfk();
2222
2223 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2224 mutex_lock(&tpacpi_inputdev_send_mutex);
2225
2226 input_report_switch(tpacpi_inputdev,
2227 SW_RFKILL_ALL, !!wlsw);
2228 input_sync(tpacpi_inputdev);
2229
2230 mutex_unlock(&tpacpi_inputdev_send_mutex);
2231 }
2232 hotkey_radio_sw_notify_change();
2233 }
2234
2235 static void hotkey_exit(void)
2236 {
2237 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2238 hotkey_poll_stop_sync();
2239 #endif
2240
2241 if (hotkey_dev_attributes)
2242 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2243
2244 kfree(hotkey_keycode_map);
2245
2246 if (tp_features.hotkey) {
2247 dbg_printk(TPACPI_DBG_EXIT,
2248 "restoring original hot key mask\n");
2249 /* no short-circuit boolean operator below! */
2250 if ((hotkey_mask_set(hotkey_orig_mask) |
2251 hotkey_status_set(false)) != 0)
2252 printk(TPACPI_ERR
2253 "failed to restore hot key mask "
2254 "to BIOS defaults\n");
2255 }
2256 }
2257
2258 static int __init hotkey_init(struct ibm_init_struct *iibm)
2259 {
2260 /* Requirements for changing the default keymaps:
2261 *
2262 * 1. Many of the keys are mapped to KEY_RESERVED for very
2263 * good reasons. Do not change them unless you have deep
2264 * knowledge on the IBM and Lenovo ThinkPad firmware for
2265 * the various ThinkPad models. The driver behaves
2266 * differently for KEY_RESERVED: such keys have their
2267 * hot key mask *unset* in mask_recommended, and also
2268 * in the initial hot key mask programmed into the
2269 * firmware at driver load time, which means the firm-
2270 * ware may react very differently if you change them to
2271 * something else;
2272 *
2273 * 2. You must be subscribed to the linux-thinkpad and
2274 * ibm-acpi-devel mailing lists, and you should read the
2275 * list archives since 2007 if you want to change the
2276 * keymaps. This requirement exists so that you will
2277 * know the past history of problems with the thinkpad-
2278 * acpi driver keymaps, and also that you will be
2279 * listening to any bug reports;
2280 *
2281 * 3. Do not send thinkpad-acpi specific patches directly to
2282 * for merging, *ever*. Send them to the linux-acpi
2283 * mailinglist for comments. Merging is to be done only
2284 * through acpi-test and the ACPI maintainer.
2285 *
2286 * If the above is too much to ask, don't change the keymap.
2287 * Ask the thinkpad-acpi maintainer to do it, instead.
2288 */
2289 static u16 ibm_keycode_map[] __initdata = {
2290 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2291 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2292 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2293 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2294
2295 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2296 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2297 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2298 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2299
2300 /* brightness: firmware always reacts to them, unless
2301 * X.org did some tricks in the radeon BIOS scratch
2302 * registers of *some* models */
2303 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2304 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2305
2306 /* Thinklight: firmware always react to it */
2307 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2308
2309 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2310 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2311
2312 /* Volume: firmware always react to it and reprograms
2313 * the built-in *extra* mixer. Never map it to control
2314 * another mixer by default. */
2315 KEY_RESERVED, /* 0x14: VOLUME UP */
2316 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2317 KEY_RESERVED, /* 0x16: MUTE */
2318
2319 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2320
2321 /* (assignments unknown, please report if found) */
2322 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2323 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2324 };
2325 static u16 lenovo_keycode_map[] __initdata = {
2326 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2327 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2328 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2329 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2330
2331 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2332 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2333 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2334 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2335
2336 /* These either have to go through ACPI video, or
2337 * act like in the IBM ThinkPads, so don't ever
2338 * enable them by default */
2339 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2340 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2341
2342 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2343
2344 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2345 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2346
2347 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2348 * react to it and reprograms the built-in *extra* mixer.
2349 * Never map it to control another mixer by default.
2350 *
2351 * T60?, T61, R60?, R61: firmware and EC tries to send
2352 * these over the regular keyboard, so these are no-ops,
2353 * but there are still weird bugs re. MUTE, so do not
2354 * change unless you get test reports from all Lenovo
2355 * models. May cause the BIOS to interfere with the
2356 * HDA mixer.
2357 */
2358 KEY_RESERVED, /* 0x14: VOLUME UP */
2359 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2360 KEY_RESERVED, /* 0x16: MUTE */
2361
2362 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2363
2364 /* (assignments unknown, please report if found) */
2365 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2366 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2367 };
2368
2369 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2370 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2371 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2372
2373 int res, i;
2374 int status;
2375 int hkeyv;
2376
2377 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2378
2379 BUG_ON(!tpacpi_inputdev);
2380 BUG_ON(tpacpi_inputdev->open != NULL ||
2381 tpacpi_inputdev->close != NULL);
2382
2383 TPACPI_ACPIHANDLE_INIT(hkey);
2384 mutex_init(&hotkey_mutex);
2385
2386 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2387 mutex_init(&hotkey_thread_mutex);
2388 mutex_init(&hotkey_thread_data_mutex);
2389 #endif
2390
2391 /* hotkey not supported on 570 */
2392 tp_features.hotkey = hkey_handle != NULL;
2393
2394 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2395 str_supported(tp_features.hotkey));
2396
2397 if (!tp_features.hotkey)
2398 return 1;
2399
2400 tpacpi_disable_brightness_delay();
2401
2402 hotkey_dev_attributes = create_attr_set(13, NULL);
2403 if (!hotkey_dev_attributes)
2404 return -ENOMEM;
2405 res = add_many_to_attr_set(hotkey_dev_attributes,
2406 hotkey_attributes,
2407 ARRAY_SIZE(hotkey_attributes));
2408 if (res)
2409 goto err_exit;
2410
2411 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2412 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2413 for HKEY interface version 0x100 */
2414 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2415 if ((hkeyv >> 8) != 1) {
2416 printk(TPACPI_ERR "unknown version of the "
2417 "HKEY interface: 0x%x\n", hkeyv);
2418 printk(TPACPI_ERR "please report this to %s\n",
2419 TPACPI_MAIL);
2420 } else {
2421 /*
2422 * MHKV 0x100 in A31, R40, R40e,
2423 * T4x, X31, and later
2424 */
2425 tp_features.hotkey_mask = 1;
2426 }
2427 }
2428
2429 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2430 str_supported(tp_features.hotkey_mask));
2431
2432 if (tp_features.hotkey_mask) {
2433 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2434 "MHKA", "qd")) {
2435 printk(TPACPI_ERR
2436 "missing MHKA handler, "
2437 "please report this to %s\n",
2438 TPACPI_MAIL);
2439 /* FN+F12, FN+F4, FN+F3 */
2440 hotkey_all_mask = 0x080cU;
2441 }
2442 }
2443
2444 /* hotkey_source_mask *must* be zero for
2445 * the first hotkey_mask_get */
2446 if (tp_features.hotkey_mask) {
2447 res = hotkey_mask_get();
2448 if (res)
2449 goto err_exit;
2450
2451 hotkey_orig_mask = hotkey_mask;
2452 res = add_many_to_attr_set(
2453 hotkey_dev_attributes,
2454 hotkey_mask_attributes,
2455 ARRAY_SIZE(hotkey_mask_attributes));
2456 if (res)
2457 goto err_exit;
2458 }
2459
2460 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2461 if (tp_features.hotkey_mask) {
2462 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2463 & ~hotkey_all_mask;
2464 } else {
2465 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2466 }
2467
2468 vdbg_printk(TPACPI_DBG_INIT,
2469 "hotkey source mask 0x%08x, polling freq %d\n",
2470 hotkey_source_mask, hotkey_poll_freq);
2471 #endif
2472
2473 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2474 if (dbg_wlswemul) {
2475 tp_features.hotkey_wlsw = 1;
2476 printk(TPACPI_INFO
2477 "radio switch emulation enabled\n");
2478 } else
2479 #endif
2480 /* Not all thinkpads have a hardware radio switch */
2481 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2482 tp_features.hotkey_wlsw = 1;
2483 printk(TPACPI_INFO
2484 "radio switch found; radios are %s\n",
2485 enabled(status, 0));
2486 }
2487 if (tp_features.hotkey_wlsw)
2488 res = add_to_attr_set(hotkey_dev_attributes,
2489 &dev_attr_hotkey_radio_sw.attr);
2490
2491 /* For X41t, X60t, X61t Tablets... */
2492 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2493 tp_features.hotkey_tablet = 1;
2494 printk(TPACPI_INFO
2495 "possible tablet mode switch found; "
2496 "ThinkPad in %s mode\n",
2497 (status & TP_HOTKEY_TABLET_MASK)?
2498 "tablet" : "laptop");
2499 res = add_to_attr_set(hotkey_dev_attributes,
2500 &dev_attr_hotkey_tablet_mode.attr);
2501 }
2502
2503 if (!res)
2504 res = register_attr_set_with_sysfs(
2505 hotkey_dev_attributes,
2506 &tpacpi_pdev->dev.kobj);
2507 if (res)
2508 goto err_exit;
2509
2510 /* Set up key map */
2511
2512 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2513 GFP_KERNEL);
2514 if (!hotkey_keycode_map) {
2515 printk(TPACPI_ERR
2516 "failed to allocate memory for key map\n");
2517 res = -ENOMEM;
2518 goto err_exit;
2519 }
2520
2521 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2522 dbg_printk(TPACPI_DBG_INIT,
2523 "using Lenovo default hot key map\n");
2524 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2525 TPACPI_HOTKEY_MAP_SIZE);
2526 } else {
2527 dbg_printk(TPACPI_DBG_INIT,
2528 "using IBM default hot key map\n");
2529 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2530 TPACPI_HOTKEY_MAP_SIZE);
2531 }
2532
2533 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2534 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2535 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2536 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2537 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2538 tpacpi_inputdev->keycode = hotkey_keycode_map;
2539 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2540 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2541 set_bit(hotkey_keycode_map[i],
2542 tpacpi_inputdev->keybit);
2543 } else {
2544 if (i < sizeof(hotkey_reserved_mask)*8)
2545 hotkey_reserved_mask |= 1 << i;
2546 }
2547 }
2548
2549 if (tp_features.hotkey_wlsw) {
2550 set_bit(EV_SW, tpacpi_inputdev->evbit);
2551 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2552 }
2553 if (tp_features.hotkey_tablet) {
2554 set_bit(EV_SW, tpacpi_inputdev->evbit);
2555 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2556 }
2557
2558 /* Do not issue duplicate brightness change events to
2559 * userspace */
2560 if (!tp_features.bright_acpimode)
2561 /* update bright_acpimode... */
2562 tpacpi_check_std_acpi_brightness_support();
2563
2564 if (tp_features.bright_acpimode) {
2565 printk(TPACPI_INFO
2566 "This ThinkPad has standard ACPI backlight "
2567 "brightness control, supported by the ACPI "
2568 "video driver\n");
2569 printk(TPACPI_NOTICE
2570 "Disabling thinkpad-acpi brightness events "
2571 "by default...\n");
2572
2573 /* The hotkey_reserved_mask change below is not
2574 * necessary while the keys are at KEY_RESERVED in the
2575 * default map, but better safe than sorry, leave it
2576 * here as a marker of what we have to do, especially
2577 * when we finally become able to set this at runtime
2578 * on response to X.org requests */
2579 hotkey_reserved_mask |=
2580 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2581 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2582 }
2583
2584 dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2585 res = hotkey_status_set(true);
2586 if (res) {
2587 hotkey_exit();
2588 return res;
2589 }
2590 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2591 & ~hotkey_reserved_mask)
2592 | hotkey_orig_mask);
2593 if (res < 0 && res != -ENXIO) {
2594 hotkey_exit();
2595 return res;
2596 }
2597
2598 dbg_printk(TPACPI_DBG_INIT,
2599 "legacy hot key reporting over procfs %s\n",
2600 (hotkey_report_mode < 2) ?
2601 "enabled" : "disabled");
2602
2603 tpacpi_inputdev->open = &hotkey_inputdev_open;
2604 tpacpi_inputdev->close = &hotkey_inputdev_close;
2605
2606 hotkey_poll_setup_safe(1);
2607 tpacpi_send_radiosw_update();
2608 tpacpi_input_send_tabletsw();
2609
2610 return 0;
2611
2612 err_exit:
2613 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2614 hotkey_dev_attributes = NULL;
2615
2616 return (res < 0)? res : 1;
2617 }
2618
2619 static bool hotkey_notify_hotkey(const u32 hkey,
2620 bool *send_acpi_ev,
2621 bool *ignore_acpi_ev)
2622 {
2623 /* 0x1000-0x1FFF: key presses */
2624 unsigned int scancode = hkey & 0xfff;
2625 *send_acpi_ev = true;
2626 *ignore_acpi_ev = false;
2627
2628 if (scancode > 0 && scancode < 0x21) {
2629 scancode--;
2630 if (!(hotkey_source_mask & (1 << scancode))) {
2631 tpacpi_input_send_key(scancode);
2632 *send_acpi_ev = false;
2633 } else {
2634 *ignore_acpi_ev = true;
2635 }
2636 return true;
2637 }
2638 return false;
2639 }
2640
2641 static bool hotkey_notify_wakeup(const u32 hkey,
2642 bool *send_acpi_ev,
2643 bool *ignore_acpi_ev)
2644 {
2645 /* 0x2000-0x2FFF: Wakeup reason */
2646 *send_acpi_ev = true;
2647 *ignore_acpi_ev = false;
2648
2649 switch (hkey) {
2650 case 0x2304: /* suspend, undock */
2651 case 0x2404: /* hibernation, undock */
2652 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2653 *ignore_acpi_ev = true;
2654 break;
2655
2656 case 0x2305: /* suspend, bay eject */
2657 case 0x2405: /* hibernation, bay eject */
2658 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2659 *ignore_acpi_ev = true;
2660 break;
2661
2662 case 0x2313: /* Battery on critical low level (S3) */
2663 case 0x2413: /* Battery on critical low level (S4) */
2664 printk(TPACPI_ALERT
2665 "EMERGENCY WAKEUP: battery almost empty\n");
2666 /* how to auto-heal: */
2667 /* 2313: woke up from S3, go to S4/S5 */
2668 /* 2413: woke up from S4, go to S5 */
2669 break;
2670
2671 default:
2672 return false;
2673 }
2674
2675 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2676 printk(TPACPI_INFO
2677 "woke up due to a hot-unplug "
2678 "request...\n");
2679 hotkey_wakeup_reason_notify_change();
2680 }
2681 return true;
2682 }
2683
2684 static bool hotkey_notify_usrevent(const u32 hkey,
2685 bool *send_acpi_ev,
2686 bool *ignore_acpi_ev)
2687 {
2688 /* 0x5000-0x5FFF: human interface helpers */
2689 *send_acpi_ev = true;
2690 *ignore_acpi_ev = false;
2691
2692 switch (hkey) {
2693 case 0x5010: /* Lenovo new BIOS: brightness changed */
2694 case 0x500b: /* X61t: tablet pen inserted into bay */
2695 case 0x500c: /* X61t: tablet pen removed from bay */
2696 return true;
2697
2698 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2699 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2700 tpacpi_input_send_tabletsw();
2701 hotkey_tablet_mode_notify_change();
2702 *send_acpi_ev = false;
2703 return true;
2704
2705 case 0x5001:
2706 case 0x5002:
2707 /* LID switch events. Do not propagate */
2708 *ignore_acpi_ev = true;
2709 return true;
2710
2711 default:
2712 return false;
2713 }
2714 }
2715
2716 static bool hotkey_notify_thermal(const u32 hkey,
2717 bool *send_acpi_ev,
2718 bool *ignore_acpi_ev)
2719 {
2720 /* 0x6000-0x6FFF: thermal alarms */
2721 *send_acpi_ev = true;
2722 *ignore_acpi_ev = false;
2723
2724 switch (hkey) {
2725 case 0x6011:
2726 printk(TPACPI_CRIT
2727 "THERMAL ALARM: battery is too hot!\n");
2728 /* recommended action: warn user through gui */
2729 return true;
2730 case 0x6012:
2731 printk(TPACPI_ALERT
2732 "THERMAL EMERGENCY: battery is extremely hot!\n");
2733 /* recommended action: immediate sleep/hibernate */
2734 return true;
2735 case 0x6021:
2736 printk(TPACPI_CRIT
2737 "THERMAL ALARM: "
2738 "a sensor reports something is too hot!\n");
2739 /* recommended action: warn user through gui, that */
2740 /* some internal component is too hot */
2741 return true;
2742 case 0x6022:
2743 printk(TPACPI_ALERT
2744 "THERMAL EMERGENCY: "
2745 "a sensor reports something is extremely hot!\n");
2746 /* recommended action: immediate sleep/hibernate */
2747 return true;
2748 case 0x6030:
2749 printk(TPACPI_INFO
2750 "EC reports that Thermal Table has changed\n");
2751 /* recommended action: do nothing, we don't have
2752 * Lenovo ATM information */
2753 return true;
2754 default:
2755 printk(TPACPI_ALERT
2756 "THERMAL ALERT: unknown thermal alarm received\n");
2757 return false;
2758 }
2759 }
2760
2761 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2762 {
2763 u32 hkey;
2764 bool send_acpi_ev;
2765 bool ignore_acpi_ev;
2766 bool known_ev;
2767
2768 if (event != 0x80) {
2769 printk(TPACPI_ERR
2770 "unknown HKEY notification event %d\n", event);
2771 /* forward it to userspace, maybe it knows how to handle it */
2772 acpi_bus_generate_netlink_event(
2773 ibm->acpi->device->pnp.device_class,
2774 dev_name(&ibm->acpi->device->dev),
2775 event, 0);
2776 return;
2777 }
2778
2779 while (1) {
2780 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2781 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2782 return;
2783 }
2784
2785 if (hkey == 0) {
2786 /* queue empty */
2787 return;
2788 }
2789
2790 send_acpi_ev = true;
2791 ignore_acpi_ev = false;
2792
2793 switch (hkey >> 12) {
2794 case 1:
2795 /* 0x1000-0x1FFF: key presses */
2796 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2797 &ignore_acpi_ev);
2798 break;
2799 case 2:
2800 /* 0x2000-0x2FFF: Wakeup reason */
2801 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2802 &ignore_acpi_ev);
2803 break;
2804 case 3:
2805 /* 0x3000-0x3FFF: bay-related wakeups */
2806 if (hkey == 0x3003) {
2807 hotkey_autosleep_ack = 1;
2808 printk(TPACPI_INFO
2809 "bay ejected\n");
2810 hotkey_wakeup_hotunplug_complete_notify_change();
2811 known_ev = true;
2812 } else {
2813 known_ev = false;
2814 }
2815 break;
2816 case 4:
2817 /* 0x4000-0x4FFF: dock-related wakeups */
2818 if (hkey == 0x4003) {
2819 hotkey_autosleep_ack = 1;
2820 printk(TPACPI_INFO
2821 "undocked\n");
2822 hotkey_wakeup_hotunplug_complete_notify_change();
2823 known_ev = true;
2824 } else {
2825 known_ev = false;
2826 }
2827 break;
2828 case 5:
2829 /* 0x5000-0x5FFF: human interface helpers */
2830 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2831 &ignore_acpi_ev);
2832 break;
2833 case 6:
2834 /* 0x6000-0x6FFF: thermal alarms */
2835 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2836 &ignore_acpi_ev);
2837 break;
2838 case 7:
2839 /* 0x7000-0x7FFF: misc */
2840 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2841 tpacpi_send_radiosw_update();
2842 send_acpi_ev = 0;
2843 known_ev = true;
2844 break;
2845 }
2846 /* fallthrough to default */
2847 default:
2848 known_ev = false;
2849 }
2850 if (!known_ev) {
2851 printk(TPACPI_NOTICE
2852 "unhandled HKEY event 0x%04x\n", hkey);
2853 printk(TPACPI_NOTICE
2854 "please report the conditions when this "
2855 "event happened to %s\n", TPACPI_MAIL);
2856 }
2857
2858 /* Legacy events */
2859 if (!ignore_acpi_ev &&
2860 (send_acpi_ev || hotkey_report_mode < 2)) {
2861 acpi_bus_generate_proc_event(ibm->acpi->device,
2862 event, hkey);
2863 }
2864
2865 /* netlink events */
2866 if (!ignore_acpi_ev && send_acpi_ev) {
2867 acpi_bus_generate_netlink_event(
2868 ibm->acpi->device->pnp.device_class,
2869 dev_name(&ibm->acpi->device->dev),
2870 event, hkey);
2871 }
2872 }
2873 }
2874
2875 static void hotkey_suspend(pm_message_t state)
2876 {
2877 /* Do these on suspend, we get the events on early resume! */
2878 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2879 hotkey_autosleep_ack = 0;
2880 }
2881
2882 static void hotkey_resume(void)
2883 {
2884 tpacpi_disable_brightness_delay();
2885
2886 if (hotkey_mask_get())
2887 printk(TPACPI_ERR
2888 "error while trying to read hot key mask "
2889 "from firmware\n");
2890 tpacpi_send_radiosw_update();
2891 hotkey_tablet_mode_notify_change();
2892 hotkey_wakeup_reason_notify_change();
2893 hotkey_wakeup_hotunplug_complete_notify_change();
2894 hotkey_poll_setup_safe(0);
2895 }
2896
2897 /* procfs -------------------------------------------------------------- */
2898 static int hotkey_read(char *p)
2899 {
2900 int res, status;
2901 int len = 0;
2902
2903 if (!tp_features.hotkey) {
2904 len += sprintf(p + len, "status:\t\tnot supported\n");
2905 return len;
2906 }
2907
2908 if (mutex_lock_killable(&hotkey_mutex))
2909 return -ERESTARTSYS;
2910 res = hotkey_status_get(&status);
2911 if (!res)
2912 res = hotkey_mask_get();
2913 mutex_unlock(&hotkey_mutex);
2914 if (res)
2915 return res;
2916
2917 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2918 if (tp_features.hotkey_mask) {
2919 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2920 len += sprintf(p + len,
2921 "commands:\tenable, disable, reset, <mask>\n");
2922 } else {
2923 len += sprintf(p + len, "mask:\t\tnot supported\n");
2924 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2925 }
2926
2927 return len;
2928 }
2929
2930 static void hotkey_enabledisable_warn(void)
2931 {
2932 tpacpi_log_usertask("procfs hotkey enable/disable");
2933 WARN(1, TPACPI_WARN
2934 "hotkey enable/disable functionality has been "
2935 "removed from the driver. Hotkeys are always enabled.\n");
2936 }
2937
2938 static int hotkey_write(char *buf)
2939 {
2940 int res;
2941 u32 mask;
2942 char *cmd;
2943
2944 if (!tp_features.hotkey)
2945 return -ENODEV;
2946
2947 if (mutex_lock_killable(&hotkey_mutex))
2948 return -ERESTARTSYS;
2949
2950 mask = hotkey_mask;
2951
2952 res = 0;
2953 while ((cmd = next_cmd(&buf))) {
2954 if (strlencmp(cmd, "enable") == 0) {
2955 hotkey_enabledisable_warn();
2956 } else if (strlencmp(cmd, "disable") == 0) {
2957 hotkey_enabledisable_warn();
2958 res = -EPERM;
2959 } else if (strlencmp(cmd, "reset") == 0) {
2960 mask = hotkey_orig_mask;
2961 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2962 /* mask set */
2963 } else if (sscanf(cmd, "%x", &mask) == 1) {
2964 /* mask set */
2965 } else {
2966 res = -EINVAL;
2967 goto errexit;
2968 }
2969 }
2970 if (!res && mask != hotkey_mask)
2971 res = hotkey_mask_set(mask);
2972
2973 errexit:
2974 mutex_unlock(&hotkey_mutex);
2975 return res;
2976 }
2977
2978 static const struct acpi_device_id ibm_htk_device_ids[] = {
2979 {TPACPI_ACPI_HKEY_HID, 0},
2980 {"", 0},
2981 };
2982
2983 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2984 .hid = ibm_htk_device_ids,
2985 .notify = hotkey_notify,
2986 .handle = &hkey_handle,
2987 .type = ACPI_DEVICE_NOTIFY,
2988 };
2989
2990 static struct ibm_struct hotkey_driver_data = {
2991 .name = "hotkey",
2992 .read = hotkey_read,
2993 .write = hotkey_write,
2994 .exit = hotkey_exit,
2995 .resume = hotkey_resume,
2996 .suspend = hotkey_suspend,
2997 .acpi = &ibm_hotkey_acpidriver,
2998 };
2999
3000 /*************************************************************************
3001 * Bluetooth subdriver
3002 */
3003
3004 enum {
3005 /* ACPI GBDC/SBDC bits */
3006 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3007 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3008 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3009 off / last state */
3010 };
3011
3012 enum {
3013 /* ACPI \BLTH commands */
3014 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3015 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3016 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3017 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3018 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3019 };
3020
3021 static struct rfkill *tpacpi_bluetooth_rfkill;
3022
3023 static void bluetooth_suspend(pm_message_t state)
3024 {
3025 /* Try to make sure radio will resume powered off */
3026 acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3027 TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
3028 }
3029
3030 static int bluetooth_get_radiosw(void)
3031 {
3032 int status;
3033
3034 if (!tp_features.bluetooth)
3035 return -ENODEV;
3036
3037 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
3038 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3039 return RFKILL_STATE_HARD_BLOCKED;
3040
3041 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3042 if (dbg_bluetoothemul)
3043 return (tpacpi_bluetooth_emulstate) ?
3044 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3045 #endif
3046
3047 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3048 return -EIO;
3049
3050 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3051 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3052 }
3053
3054 static void bluetooth_update_rfk(void)
3055 {
3056 int status;
3057
3058 if (!tpacpi_bluetooth_rfkill)
3059 return;
3060
3061 status = bluetooth_get_radiosw();
3062 if (status < 0)
3063 return;
3064 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3065 }
3066
3067 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3068 {
3069 int status;
3070
3071 if (!tp_features.bluetooth)
3072 return -ENODEV;
3073
3074 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3075 * reason to risk weird behaviour. */
3076 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3077 && radio_on)
3078 return -EPERM;
3079
3080 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3081 if (dbg_bluetoothemul) {
3082 tpacpi_bluetooth_emulstate = !!radio_on;
3083 if (update_rfk)
3084 bluetooth_update_rfk();
3085 return 0;
3086 }
3087 #endif
3088
3089 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3090 if (radio_on)
3091 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3092 else
3093 status = 0;
3094 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3095 return -EIO;
3096
3097 if (update_rfk)
3098 bluetooth_update_rfk();
3099
3100 return 0;
3101 }
3102
3103 /* sysfs bluetooth enable ---------------------------------------------- */
3104 static ssize_t bluetooth_enable_show(struct device *dev,
3105 struct device_attribute *attr,
3106 char *buf)
3107 {
3108 int status;
3109
3110 printk_deprecated_rfkill_attribute("bluetooth_enable");
3111
3112 status = bluetooth_get_radiosw();
3113 if (status < 0)
3114 return status;
3115
3116 return snprintf(buf, PAGE_SIZE, "%d\n",
3117 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3118 }
3119
3120 static ssize_t bluetooth_enable_store(struct device *dev,
3121 struct device_attribute *attr,
3122 const char *buf, size_t count)
3123 {
3124 unsigned long t;
3125 int res;
3126
3127 printk_deprecated_rfkill_attribute("bluetooth_enable");
3128
3129 if (parse_strtoul(buf, 1, &t))
3130 return -EINVAL;
3131
3132 res = bluetooth_set_radiosw(t, 1);
3133
3134 return (res) ? res : count;
3135 }
3136
3137 static struct device_attribute dev_attr_bluetooth_enable =
3138 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3139 bluetooth_enable_show, bluetooth_enable_store);
3140
3141 /* --------------------------------------------------------------------- */
3142
3143 static struct attribute *bluetooth_attributes[] = {
3144 &dev_attr_bluetooth_enable.attr,
3145 NULL
3146 };
3147
3148 static const struct attribute_group bluetooth_attr_group = {
3149 .attrs = bluetooth_attributes,
3150 };
3151
3152 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3153 {
3154 int bts = bluetooth_get_radiosw();
3155
3156 if (bts < 0)
3157 return bts;
3158
3159 *state = bts;
3160 return 0;
3161 }
3162
3163 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3164 {
3165 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3166 }
3167
3168 static void bluetooth_shutdown(void)
3169 {
3170 /* Order firmware to save current state to NVRAM */
3171 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3172 TP_ACPI_BLTH_SAVE_STATE))
3173 printk(TPACPI_NOTICE
3174 "failed to save bluetooth state to NVRAM\n");
3175 }
3176
3177 static void bluetooth_exit(void)
3178 {
3179 bluetooth_shutdown();
3180
3181 if (tpacpi_bluetooth_rfkill)
3182 rfkill_unregister(tpacpi_bluetooth_rfkill);
3183
3184 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3185 &bluetooth_attr_group);
3186 }
3187
3188 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3189 {
3190 int res;
3191 int status = 0;
3192
3193 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
3194
3195 TPACPI_ACPIHANDLE_INIT(hkey);
3196
3197 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3198 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3199 tp_features.bluetooth = hkey_handle &&
3200 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3201
3202 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
3203 str_supported(tp_features.bluetooth),
3204 status);
3205
3206 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3207 if (dbg_bluetoothemul) {
3208 tp_features.bluetooth = 1;
3209 printk(TPACPI_INFO
3210 "bluetooth switch emulation enabled\n");
3211 } else
3212 #endif
3213 if (tp_features.bluetooth &&
3214 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3215 /* no bluetooth hardware present in system */
3216 tp_features.bluetooth = 0;
3217 dbg_printk(TPACPI_DBG_INIT,
3218 "bluetooth hardware not installed\n");
3219 }
3220
3221 if (!tp_features.bluetooth)
3222 return 1;
3223
3224 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3225 &bluetooth_attr_group);
3226 if (res)
3227 return res;
3228
3229 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3230 &tpacpi_bluetooth_rfkill,
3231 RFKILL_TYPE_BLUETOOTH,
3232 "tpacpi_bluetooth_sw",
3233 true,
3234 tpacpi_bluetooth_rfk_set,
3235 tpacpi_bluetooth_rfk_get);
3236 if (res) {
3237 bluetooth_exit();
3238 return res;
3239 }
3240
3241 return 0;
3242 }
3243
3244 /* procfs -------------------------------------------------------------- */
3245 static int bluetooth_read(char *p)
3246 {
3247 int len = 0;
3248 int status = bluetooth_get_radiosw();
3249
3250 if (!tp_features.bluetooth)
3251 len += sprintf(p + len, "status:\t\tnot supported\n");
3252 else {
3253 len += sprintf(p + len, "status:\t\t%s\n",
3254 (status == RFKILL_STATE_UNBLOCKED) ?
3255 "enabled" : "disabled");
3256 len += sprintf(p + len, "commands:\tenable, disable\n");
3257 }
3258
3259 return len;
3260 }
3261
3262 static int bluetooth_write(char *buf)
3263 {
3264 char *cmd;
3265
3266 if (!tp_features.bluetooth)
3267 return -ENODEV;
3268
3269 while ((cmd = next_cmd(&buf))) {
3270 if (strlencmp(cmd, "enable") == 0) {
3271 bluetooth_set_radiosw(1, 1);
3272 } else if (strlencmp(cmd, "disable") == 0) {
3273 bluetooth_set_radiosw(0, 1);
3274 } else
3275 return -EINVAL;
3276 }
3277
3278 return 0;
3279 }
3280
3281 static struct ibm_struct bluetooth_driver_data = {
3282 .name = "bluetooth",
3283 .read = bluetooth_read,
3284 .write = bluetooth_write,
3285 .exit = bluetooth_exit,
3286 .suspend = bluetooth_suspend,
3287 .shutdown = bluetooth_shutdown,
3288 };
3289
3290 /*************************************************************************
3291 * Wan subdriver
3292 */
3293
3294 enum {
3295 /* ACPI GWAN/SWAN bits */
3296 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3297 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3298 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3299 off / last state */
3300 };
3301
3302 static struct rfkill *tpacpi_wan_rfkill;
3303
3304 static void wan_suspend(pm_message_t state)
3305 {
3306 /* Try to make sure radio will resume powered off */
3307 acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3308 TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
3309 }
3310
3311 static int wan_get_radiosw(void)
3312 {
3313 int status;
3314
3315 if (!tp_features.wan)
3316 return -ENODEV;
3317
3318 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3319 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3320 return RFKILL_STATE_HARD_BLOCKED;
3321
3322 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3323 if (dbg_wwanemul)
3324 return (tpacpi_wwan_emulstate) ?
3325 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3326 #endif
3327
3328 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3329 return -EIO;
3330
3331 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3332 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3333 }
3334
3335 static void wan_update_rfk(void)
3336 {
3337 int status;
3338
3339 if (!tpacpi_wan_rfkill)
3340 return;
3341
3342 status = wan_get_radiosw();
3343 if (status < 0)
3344 return;
3345 rfkill_force_state(tpacpi_wan_rfkill, status);
3346 }
3347
3348 static int wan_set_radiosw(int radio_on, int update_rfk)
3349 {
3350 int status;
3351
3352 if (!tp_features.wan)
3353 return -ENODEV;
3354
3355 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3356 * reason to risk weird behaviour. */
3357 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3358 && radio_on)
3359 return -EPERM;
3360
3361 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3362 if (dbg_wwanemul) {
3363 tpacpi_wwan_emulstate = !!radio_on;
3364 if (update_rfk)
3365 wan_update_rfk();
3366 return 0;
3367 }
3368 #endif
3369
3370 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3371 if (radio_on)
3372 status = TP_ACPI_WANCARD_RADIOSSW;
3373 else
3374 status = 0;
3375 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3376 return -EIO;
3377
3378 if (update_rfk)
3379 wan_update_rfk();
3380
3381 return 0;
3382 }
3383
3384 /* sysfs wan enable ---------------------------------------------------- */
3385 static ssize_t wan_enable_show(struct device *dev,
3386 struct device_attribute *attr,
3387 char *buf)
3388 {
3389 int status;
3390
3391 printk_deprecated_rfkill_attribute("wwan_enable");
3392
3393 status = wan_get_radiosw();
3394 if (status < 0)
3395 return status;
3396
3397 return snprintf(buf, PAGE_SIZE, "%d\n",
3398 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3399 }
3400
3401 static ssize_t wan_enable_store(struct device *dev,
3402 struct device_attribute *attr,
3403 const char *buf, size_t count)
3404 {
3405 unsigned long t;
3406 int res;
3407
3408 printk_deprecated_rfkill_attribute("wwan_enable");
3409
3410 if (parse_strtoul(buf, 1, &t))
3411 return -EINVAL;
3412
3413 res = wan_set_radiosw(t, 1);
3414
3415 return (res) ? res : count;
3416 }
3417
3418 static struct device_attribute dev_attr_wan_enable =
3419 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3420 wan_enable_show, wan_enable_store);
3421
3422 /* --------------------------------------------------------------------- */
3423
3424 static struct attribute *wan_attributes[] = {
3425 &dev_attr_wan_enable.attr,
3426 NULL
3427 };
3428
3429 static const struct attribute_group wan_attr_group = {
3430 .attrs = wan_attributes,
3431 };
3432
3433 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3434 {
3435 int wans = wan_get_radiosw();
3436
3437 if (wans < 0)
3438 return wans;
3439
3440 *state = wans;
3441 return 0;
3442 }
3443
3444 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3445 {
3446 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3447 }
3448
3449 static void wan_shutdown(void)
3450 {
3451 /* Order firmware to save current state to NVRAM */
3452 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3453 TP_ACPI_WGSV_SAVE_STATE))
3454 printk(TPACPI_NOTICE
3455 "failed to save WWAN state to NVRAM\n");
3456 }
3457
3458 static void wan_exit(void)
3459 {
3460 wan_shutdown();
3461
3462 if (tpacpi_wan_rfkill)
3463 rfkill_unregister(tpacpi_wan_rfkill);
3464
3465 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3466 &wan_attr_group);
3467 }
3468
3469 static int __init wan_init(struct ibm_init_struct *iibm)
3470 {
3471 int res;
3472 int status = 0;
3473
3474 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3475
3476 TPACPI_ACPIHANDLE_INIT(hkey);
3477
3478 tp_features.wan = hkey_handle &&
3479 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3480
3481 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3482 str_supported(tp_features.wan),
3483 status);
3484
3485 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3486 if (dbg_wwanemul) {
3487 tp_features.wan = 1;
3488 printk(TPACPI_INFO
3489 "wwan switch emulation enabled\n");
3490 } else
3491 #endif
3492 if (tp_features.wan &&
3493 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3494 /* no wan hardware present in system */
3495 tp_features.wan = 0;
3496 dbg_printk(TPACPI_DBG_INIT,
3497 "wan hardware not installed\n");
3498 }
3499
3500 if (!tp_features.wan)
3501 return 1;
3502
3503 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3504 &wan_attr_group);
3505 if (res)
3506 return res;
3507
3508 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3509 &tpacpi_wan_rfkill,
3510 RFKILL_TYPE_WWAN,
3511 "tpacpi_wwan_sw",
3512 true,
3513 tpacpi_wan_rfk_set,
3514 tpacpi_wan_rfk_get);
3515 if (res) {
3516 wan_exit();
3517 return res;
3518 }
3519
3520 return 0;
3521 }
3522
3523 /* procfs -------------------------------------------------------------- */
3524 static int wan_read(char *p)
3525 {
3526 int len = 0;
3527 int status = wan_get_radiosw();
3528
3529 if (!tp_features.wan)
3530 len += sprintf(p + len, "status:\t\tnot supported\n");
3531 else {
3532 len += sprintf(p + len, "status:\t\t%s\n",
3533 (status == RFKILL_STATE_UNBLOCKED) ?
3534 "enabled" : "disabled");
3535 len += sprintf(p + len, "commands:\tenable, disable\n");
3536 }
3537
3538 return len;
3539 }
3540
3541 static int wan_write(char *buf)
3542 {
3543 char *cmd;
3544
3545 if (!tp_features.wan)
3546 return -ENODEV;
3547
3548 while ((cmd = next_cmd(&buf))) {
3549 if (strlencmp(cmd, "enable") == 0) {
3550 wan_set_radiosw(1, 1);
3551 } else if (strlencmp(cmd, "disable") == 0) {
3552 wan_set_radiosw(0, 1);
3553 } else
3554 return -EINVAL;
3555 }
3556
3557 return 0;
3558 }
3559
3560 static struct ibm_struct wan_driver_data = {
3561 .name = "wan",
3562 .read = wan_read,
3563 .write = wan_write,
3564 .exit = wan_exit,
3565 .suspend = wan_suspend,
3566 .shutdown = wan_shutdown,
3567 };
3568
3569 /*************************************************************************
3570 * UWB subdriver
3571 */
3572
3573 enum {
3574 /* ACPI GUWB/SUWB bits */
3575 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3576 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3577 };
3578
3579 static struct rfkill *tpacpi_uwb_rfkill;
3580
3581 static int uwb_get_radiosw(void)
3582 {
3583 int status;
3584
3585 if (!tp_features.uwb)
3586 return -ENODEV;
3587
3588 /* WLSW overrides UWB in firmware/hardware, reflect that */
3589 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3590 return RFKILL_STATE_HARD_BLOCKED;
3591
3592 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3593 if (dbg_uwbemul)
3594 return (tpacpi_uwb_emulstate) ?
3595 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3596 #endif
3597
3598 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3599 return -EIO;
3600
3601 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3602 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3603 }
3604
3605 static void uwb_update_rfk(void)
3606 {
3607 int status;
3608
3609 if (!tpacpi_uwb_rfkill)
3610 return;
3611
3612 status = uwb_get_radiosw();
3613 if (status < 0)
3614 return;
3615 rfkill_force_state(tpacpi_uwb_rfkill, status);
3616 }
3617
3618 static int uwb_set_radiosw(int radio_on, int update_rfk)
3619 {
3620 int status;
3621
3622 if (!tp_features.uwb)
3623 return -ENODEV;
3624
3625 /* WLSW overrides UWB in firmware/hardware, but there is no
3626 * reason to risk weird behaviour. */
3627 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3628 && radio_on)
3629 return -EPERM;
3630
3631 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3632 if (dbg_uwbemul) {
3633 tpacpi_uwb_emulstate = !!radio_on;
3634 if (update_rfk)
3635 uwb_update_rfk();
3636 return 0;
3637 }
3638 #endif
3639
3640 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3641 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3642 return -EIO;
3643
3644 if (update_rfk)
3645 uwb_update_rfk();
3646
3647 return 0;
3648 }
3649
3650 /* --------------------------------------------------------------------- */
3651
3652 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3653 {
3654 int uwbs = uwb_get_radiosw();
3655
3656 if (uwbs < 0)
3657 return uwbs;
3658
3659 *state = uwbs;
3660 return 0;
3661 }
3662
3663 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3664 {
3665 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3666 }
3667
3668 static void uwb_exit(void)
3669 {
3670 if (tpacpi_uwb_rfkill)
3671 rfkill_unregister(tpacpi_uwb_rfkill);
3672 }
3673
3674 static int __init uwb_init(struct ibm_init_struct *iibm)
3675 {
3676 int res;
3677 int status = 0;
3678
3679 vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
3680
3681 TPACPI_ACPIHANDLE_INIT(hkey);
3682
3683 tp_features.uwb = hkey_handle &&
3684 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3685
3686 vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
3687 str_supported(tp_features.uwb),
3688 status);
3689
3690 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3691 if (dbg_uwbemul) {
3692 tp_features.uwb = 1;
3693 printk(TPACPI_INFO
3694 "uwb switch emulation enabled\n");
3695 } else
3696 #endif
3697 if (tp_features.uwb &&
3698 !(status & TP_ACPI_UWB_HWPRESENT)) {
3699 /* no uwb hardware present in system */
3700 tp_features.uwb = 0;
3701 dbg_printk(TPACPI_DBG_INIT,
3702 "uwb hardware not installed\n");
3703 }
3704
3705 if (!tp_features.uwb)
3706 return 1;
3707
3708 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3709 &tpacpi_uwb_rfkill,
3710 RFKILL_TYPE_UWB,
3711 "tpacpi_uwb_sw",
3712 false,
3713 tpacpi_uwb_rfk_set,
3714 tpacpi_uwb_rfk_get);
3715
3716 return res;
3717 }
3718
3719 static struct ibm_struct uwb_driver_data = {
3720 .name = "uwb",
3721 .exit = uwb_exit,
3722 .flags.experimental = 1,
3723 };
3724
3725 /*************************************************************************
3726 * Video subdriver
3727 */
3728
3729 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3730
3731 enum video_access_mode {
3732 TPACPI_VIDEO_NONE = 0,
3733 TPACPI_VIDEO_570, /* 570 */
3734 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3735 TPACPI_VIDEO_NEW, /* all others */
3736 };
3737
3738 enum { /* video status flags, based on VIDEO_570 */
3739 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3740 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3741 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3742 };
3743
3744 enum { /* TPACPI_VIDEO_570 constants */
3745 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3746 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3747 * video_status_flags */
3748 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3749 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3750 };
3751
3752 static enum video_access_mode video_supported;
3753 static int video_orig_autosw;
3754
3755 static int video_autosw_get(void);
3756 static int video_autosw_set(int enable);
3757
3758 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3759
3760 static int __init video_init(struct ibm_init_struct *iibm)
3761 {
3762 int ivga;
3763
3764 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3765
3766 TPACPI_ACPIHANDLE_INIT(vid);
3767 TPACPI_ACPIHANDLE_INIT(vid2);
3768
3769 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3770 /* G41, assume IVGA doesn't change */
3771 vid_handle = vid2_handle;
3772
3773 if (!vid_handle)
3774 /* video switching not supported on R30, R31 */
3775 video_supported = TPACPI_VIDEO_NONE;
3776 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3777 /* 570 */
3778 video_supported = TPACPI_VIDEO_570;
3779 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3780 /* 600e/x, 770e, 770x */
3781 video_supported = TPACPI_VIDEO_770;
3782 else
3783 /* all others */
3784 video_supported = TPACPI_VIDEO_NEW;
3785
3786 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3787 str_supported(video_supported != TPACPI_VIDEO_NONE),
3788 video_supported);
3789
3790 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3791 }
3792
3793 static void video_exit(void)
3794 {
3795 dbg_printk(TPACPI_DBG_EXIT,
3796 "restoring original video autoswitch mode\n");
3797 if (video_autosw_set(video_orig_autosw))
3798 printk(TPACPI_ERR "error while trying to restore original "
3799 "video autoswitch mode\n");
3800 }
3801
3802 static int video_outputsw_get(void)
3803 {
3804 int status = 0;
3805 int i;
3806
3807 switch (video_supported) {
3808 case TPACPI_VIDEO_570:
3809 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3810 TP_ACPI_VIDEO_570_PHSCMD))
3811 return -EIO;
3812 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3813 break;
3814 case TPACPI_VIDEO_770:
3815 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3816 return -EIO;
3817 if (i)
3818 status |= TP_ACPI_VIDEO_S_LCD;
3819 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3820 return -EIO;
3821 if (i)
3822 status |= TP_ACPI_VIDEO_S_CRT;
3823 break;
3824 case TPACPI_VIDEO_NEW:
3825 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3826 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3827 return -EIO;
3828 if (i)
3829 status |= TP_ACPI_VIDEO_S_CRT;
3830
3831 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3832 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3833 return -EIO;
3834 if (i)
3835 status |= TP_ACPI_VIDEO_S_LCD;
3836 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3837 return -EIO;
3838 if (i)
3839 status |= TP_ACPI_VIDEO_S_DVI;
3840 break;
3841 default:
3842 return -ENOSYS;
3843 }
3844
3845 return status;
3846 }
3847
3848 static int video_outputsw_set(int status)
3849 {
3850 int autosw;
3851 int res = 0;
3852
3853 switch (video_supported) {
3854 case TPACPI_VIDEO_570:
3855 res = acpi_evalf(NULL, NULL,
3856 "\\_SB.PHS2", "vdd",
3857 TP_ACPI_VIDEO_570_PHS2CMD,
3858 status | TP_ACPI_VIDEO_570_PHS2SET);
3859 break;
3860 case TPACPI_VIDEO_770:
3861 autosw = video_autosw_get();
3862 if (autosw < 0)
3863 return autosw;
3864
3865 res = video_autosw_set(1);
3866 if (res)
3867 return res;
3868 res = acpi_evalf(vid_handle, NULL,
3869 "ASWT", "vdd", status * 0x100, 0);
3870 if (!autosw && video_autosw_set(autosw)) {
3871 printk(TPACPI_ERR
3872 "video auto-switch left enabled due to error\n");
3873 return -EIO;
3874 }
3875 break;
3876 case TPACPI_VIDEO_NEW:
3877 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3878 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3879 break;
3880 default:
3881 return -ENOSYS;
3882 }
3883
3884 return (res)? 0 : -EIO;
3885 }
3886
3887 static int video_autosw_get(void)
3888 {
3889 int autosw = 0;
3890
3891 switch (video_supported) {
3892 case TPACPI_VIDEO_570:
3893 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3894 return -EIO;
3895 break;
3896 case TPACPI_VIDEO_770:
3897 case TPACPI_VIDEO_NEW:
3898 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3899 return -EIO;
3900 break;
3901 default:
3902 return -ENOSYS;
3903 }
3904
3905 return autosw & 1;
3906 }
3907
3908 static int video_autosw_set(int enable)
3909 {
3910 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3911 return -EIO;
3912 return 0;
3913 }
3914
3915 static int video_outputsw_cycle(void)
3916 {
3917 int autosw = video_autosw_get();
3918 int res;
3919
3920 if (autosw < 0)
3921 return autosw;
3922
3923 switch (video_supported) {
3924 case TPACPI_VIDEO_570:
3925 res = video_autosw_set(1);
3926 if (res)
3927 return res;
3928 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3929 break;
3930 case TPACPI_VIDEO_770:
3931 case TPACPI_VIDEO_NEW:
3932 res = video_autosw_set(1);
3933 if (res)
3934 return res;
3935 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3936 break;
3937 default:
3938 return -ENOSYS;
3939 }
3940 if (!autosw && video_autosw_set(autosw)) {
3941 printk(TPACPI_ERR
3942 "video auto-switch left enabled due to error\n");
3943 return -EIO;
3944 }
3945
3946 return (res)? 0 : -EIO;
3947 }
3948
3949 static int video_expand_toggle(void)
3950 {
3951 switch (video_supported) {
3952 case TPACPI_VIDEO_570:
3953 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3954 0 : -EIO;
3955 case TPACPI_VIDEO_770:
3956 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3957 0 : -EIO;
3958 case TPACPI_VIDEO_NEW:
3959 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3960 0 : -EIO;
3961 default:
3962 return -ENOSYS;
3963 }
3964 /* not reached */
3965 }
3966
3967 static int video_read(char *p)
3968 {
3969 int status, autosw;
3970 int len = 0;
3971
3972 if (video_supported == TPACPI_VIDEO_NONE) {
3973 len += sprintf(p + len, "status:\t\tnot supported\n");
3974 return len;
3975 }
3976
3977 status = video_outputsw_get();
3978 if (status < 0)
3979 return status;
3980
3981 autosw = video_autosw_get();
3982 if (autosw < 0)
3983 return autosw;
3984
3985 len += sprintf(p + len, "status:\t\tsupported\n");
3986 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3987 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3988 if (video_supported == TPACPI_VIDEO_NEW)
3989 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3990 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3991 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3992 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3993 if (video_supported == TPACPI_VIDEO_NEW)
3994 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3995 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3996 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3997
3998 return len;
3999 }
4000
4001 static int video_write(char *buf)
4002 {
4003 char *cmd;
4004 int enable, disable, status;
4005 int res;
4006
4007 if (video_supported == TPACPI_VIDEO_NONE)
4008 return -ENODEV;
4009
4010 enable = 0;
4011 disable = 0;
4012
4013 while ((cmd = next_cmd(&buf))) {
4014 if (strlencmp(cmd, "lcd_enable") == 0) {
4015 enable |= TP_ACPI_VIDEO_S_LCD;
4016 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4017 disable |= TP_ACPI_VIDEO_S_LCD;
4018 } else if (strlencmp(cmd, "crt_enable") == 0) {
4019 enable |= TP_ACPI_VIDEO_S_CRT;
4020 } else if (strlencmp(cmd, "crt_disable") == 0) {
4021 disable |= TP_ACPI_VIDEO_S_CRT;
4022 } else if (video_supported == TPACPI_VIDEO_NEW &&
4023 strlencmp(cmd, "dvi_enable") == 0) {
4024 enable |= TP_ACPI_VIDEO_S_DVI;
4025 } else if (video_supported == TPACPI_VIDEO_NEW &&
4026 strlencmp(cmd, "dvi_disable") == 0) {
4027 disable |= TP_ACPI_VIDEO_S_DVI;
4028 } else if (strlencmp(cmd, "auto_enable") == 0) {
4029 res = video_autosw_set(1);
4030 if (res)
4031 return res;
4032 } else if (strlencmp(cmd, "auto_disable") == 0) {
4033 res = video_autosw_set(0);
4034 if (res)
4035 return res;
4036 } else if (strlencmp(cmd, "video_switch") == 0) {
4037 res = video_outputsw_cycle();
4038 if (res)
4039 return res;
4040 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4041 res = video_expand_toggle();
4042 if (res)
4043 return res;
4044 } else
4045 return -EINVAL;
4046 }
4047
4048 if (enable || disable) {
4049 status = video_outputsw_get();
4050 if (status < 0)
4051 return status;
4052 res = video_outputsw_set((status & ~disable) | enable);
4053 if (res)
4054 return res;
4055 }
4056
4057 return 0;
4058 }
4059
4060 static struct ibm_struct video_driver_data = {
4061 .name = "video",
4062 .read = video_read,
4063 .write = video_write,
4064 .exit = video_exit,
4065 };
4066
4067 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4068
4069 /*************************************************************************
4070 * Light (thinklight) subdriver
4071 */
4072
4073 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4074 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4075
4076 static int light_get_status(void)
4077 {
4078 int status = 0;
4079
4080 if (tp_features.light_status) {
4081 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4082 return -EIO;
4083 return (!!status);
4084 }
4085
4086 return -ENXIO;
4087 }
4088
4089 static int light_set_status(int status)
4090 {
4091 int rc;
4092
4093 if (tp_features.light) {
4094 if (cmos_handle) {
4095 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4096 (status)?
4097 TP_CMOS_THINKLIGHT_ON :
4098 TP_CMOS_THINKLIGHT_OFF);
4099 } else {
4100 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4101 (status)? 1 : 0);
4102 }
4103 return (rc)? 0 : -EIO;
4104 }
4105
4106 return -ENXIO;
4107 }
4108
4109 static void light_set_status_worker(struct work_struct *work)
4110 {
4111 struct tpacpi_led_classdev *data =
4112 container_of(work, struct tpacpi_led_classdev, work);
4113
4114 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4115 light_set_status((data->new_brightness != LED_OFF));
4116 }
4117
4118 static void light_sysfs_set(struct led_classdev *led_cdev,
4119 enum led_brightness brightness)
4120 {
4121 struct tpacpi_led_classdev *data =
4122 container_of(led_cdev,
4123 struct tpacpi_led_classdev,
4124 led_classdev);
4125 data->new_brightness = brightness;
4126 queue_work(tpacpi_wq, &data->work);
4127 }
4128
4129 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4130 {
4131 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4132 }
4133
4134 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4135 .led_classdev = {
4136 .name = "tpacpi::thinklight",
4137 .brightness_set = &light_sysfs_set,
4138 .brightness_get = &light_sysfs_get,
4139 }
4140 };
4141
4142 static int __init light_init(struct ibm_init_struct *iibm)
4143 {
4144 int rc;
4145
4146 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4147
4148 TPACPI_ACPIHANDLE_INIT(ledb);
4149 TPACPI_ACPIHANDLE_INIT(lght);
4150 TPACPI_ACPIHANDLE_INIT(cmos);
4151 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4152
4153 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4154 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4155
4156 if (tp_features.light)
4157 /* light status not supported on
4158 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4159 tp_features.light_status =
4160 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4161
4162 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4163 str_supported(tp_features.light),
4164 str_supported(tp_features.light_status));
4165
4166 if (!tp_features.light)
4167 return 1;
4168
4169 rc = led_classdev_register(&tpacpi_pdev->dev,
4170 &tpacpi_led_thinklight.led_classdev);
4171
4172 if (rc < 0) {
4173 tp_features.light = 0;
4174 tp_features.light_status = 0;
4175 } else {
4176 rc = 0;
4177 }
4178
4179 return rc;
4180 }
4181
4182 static void light_exit(void)
4183 {
4184 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4185 if (work_pending(&tpacpi_led_thinklight.work))
4186 flush_workqueue(tpacpi_wq);
4187 }
4188
4189 static int light_read(char *p)
4190 {
4191 int len = 0;
4192 int status;
4193
4194 if (!tp_features.light) {
4195 len += sprintf(p + len, "status:\t\tnot supported\n");
4196 } else if (!tp_features.light_status) {
4197 len += sprintf(p + len, "status:\t\tunknown\n");
4198 len += sprintf(p + len, "commands:\ton, off\n");
4199 } else {
4200 status = light_get_status();
4201 if (status < 0)
4202 return status;
4203 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4204 len += sprintf(p + len, "commands:\ton, off\n");
4205 }
4206
4207 return len;
4208 }
4209
4210 static int light_write(char *buf)
4211 {
4212 char *cmd;
4213 int newstatus = 0;
4214
4215 if (!tp_features.light)
4216 return -ENODEV;
4217
4218 while ((cmd = next_cmd(&buf))) {
4219 if (strlencmp(cmd, "on") == 0) {
4220 newstatus = 1;
4221 } else if (strlencmp(cmd, "off") == 0) {
4222 newstatus = 0;
4223 } else
4224 return -EINVAL;
4225 }
4226
4227 return light_set_status(newstatus);
4228 }
4229
4230 static struct ibm_struct light_driver_data = {
4231 .name = "light",
4232 .read = light_read,
4233 .write = light_write,
4234 .exit = light_exit,
4235 };
4236
4237 /*************************************************************************
4238 * Dock subdriver
4239 */
4240
4241 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4242
4243 static void dock_notify(struct ibm_struct *ibm, u32 event);
4244 static int dock_read(char *p);
4245 static int dock_write(char *buf);
4246
4247 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4248 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4249 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4250 "\\_SB.PCI.ISA.SLCE", /* 570 */
4251 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4252
4253 /* don't list other alternatives as we install a notify handler on the 570 */
4254 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4255
4256 static const struct acpi_device_id ibm_pci_device_ids[] = {
4257 {PCI_ROOT_HID_STRING, 0},
4258 {"", 0},
4259 };
4260
4261 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4262 {
4263 .notify = dock_notify,
4264 .handle = &dock_handle,
4265 .type = ACPI_SYSTEM_NOTIFY,
4266 },
4267 {
4268 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4269 * We just use it to get notifications of dock hotplug
4270 * in very old thinkpads */
4271 .hid = ibm_pci_device_ids,
4272 .notify = dock_notify,
4273 .handle = &pci_handle,
4274 .type = ACPI_SYSTEM_NOTIFY,
4275 },
4276 };
4277
4278 static struct ibm_struct dock_driver_data[2] = {
4279 {
4280 .name = "dock",
4281 .read = dock_read,
4282 .write = dock_write,
4283 .acpi = &ibm_dock_acpidriver[0],
4284 },
4285 {
4286 .name = "dock",
4287 .acpi = &ibm_dock_acpidriver[1],
4288 },
4289 };
4290
4291 #define dock_docked() (_sta(dock_handle) & 1)
4292
4293 static int __init dock_init(struct ibm_init_struct *iibm)
4294 {
4295 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4296
4297 TPACPI_ACPIHANDLE_INIT(dock);
4298
4299 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4300 str_supported(dock_handle != NULL));
4301
4302 return (dock_handle)? 0 : 1;
4303 }
4304
4305 static int __init dock_init2(struct ibm_init_struct *iibm)
4306 {
4307 int dock2_needed;
4308
4309 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4310
4311 if (dock_driver_data[0].flags.acpi_driver_registered &&
4312 dock_driver_data[0].flags.acpi_notify_installed) {
4313 TPACPI_ACPIHANDLE_INIT(pci);
4314 dock2_needed = (pci_handle != NULL);
4315 vdbg_printk(TPACPI_DBG_INIT,
4316 "dock PCI handler for the TP 570 is %s\n",
4317 str_supported(dock2_needed));
4318 } else {
4319 vdbg_printk(TPACPI_DBG_INIT,
4320 "dock subdriver part 2 not required\n");
4321 dock2_needed = 0;
4322 }
4323
4324 return (dock2_needed)? 0 : 1;
4325 }
4326
4327 static void dock_notify(struct ibm_struct *ibm, u32 event)
4328 {
4329 int docked = dock_docked();
4330 int pci = ibm->acpi->hid && ibm->acpi->device &&
4331 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4332 int data;
4333
4334 if (event == 1 && !pci) /* 570 */
4335 data = 1; /* button */
4336 else if (event == 1 && pci) /* 570 */
4337 data = 3; /* dock */
4338 else if (event == 3 && docked)
4339 data = 1; /* button */
4340 else if (event == 3 && !docked)
4341 data = 2; /* undock */
4342 else if (event == 0 && docked)
4343 data = 3; /* dock */
4344 else {
4345 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4346 event, _sta(dock_handle));
4347 data = 0; /* unknown */
4348 }
4349 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4350 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4351 dev_name(&ibm->acpi->device->dev),
4352 event, data);
4353 }
4354
4355 static int dock_read(char *p)
4356 {
4357 int len = 0;
4358 int docked = dock_docked();
4359
4360 if (!dock_handle)
4361 len += sprintf(p + len, "status:\t\tnot supported\n");
4362 else if (!docked)
4363 len += sprintf(p + len, "status:\t\tundocked\n");
4364 else {
4365 len += sprintf(p + len, "status:\t\tdocked\n");
4366 len += sprintf(p + len, "commands:\tdock, undock\n");
4367 }
4368
4369 return len;
4370 }
4371
4372 static int dock_write(char *buf)
4373 {
4374 char *cmd;
4375
4376 if (!dock_docked())
4377 return -ENODEV;
4378
4379 while ((cmd = next_cmd(&buf))) {
4380 if (strlencmp(cmd, "undock") == 0) {
4381 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4382 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4383 return -EIO;
4384 } else if (strlencmp(cmd, "dock") == 0) {
4385 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4386 return -EIO;
4387 } else
4388 return -EINVAL;
4389 }
4390
4391 return 0;
4392 }
4393
4394 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4395
4396 /*************************************************************************
4397 * Bay subdriver
4398 */
4399
4400 #ifdef CONFIG_THINKPAD_ACPI_BAY
4401
4402 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4403 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4404 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4405 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4406 ); /* A21e, R30, R31 */
4407 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4408 "_EJ0", /* all others */
4409 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4410 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4411 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4412 ); /* all others */
4413 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4414 "_EJ0", /* 770x */
4415 ); /* all others */
4416
4417 static int __init bay_init(struct ibm_init_struct *iibm)
4418 {
4419 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4420
4421 TPACPI_ACPIHANDLE_INIT(bay);
4422 if (bay_handle)
4423 TPACPI_ACPIHANDLE_INIT(bay_ej);
4424 TPACPI_ACPIHANDLE_INIT(bay2);
4425 if (bay2_handle)
4426 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4427
4428 tp_features.bay_status = bay_handle &&
4429 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4430 tp_features.bay_status2 = bay2_handle &&
4431 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4432
4433 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4434 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4435 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4436 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4437
4438 vdbg_printk(TPACPI_DBG_INIT,
4439 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4440 str_supported(tp_features.bay_status),
4441 str_supported(tp_features.bay_eject),
4442 str_supported(tp_features.bay_status2),
4443 str_supported(tp_features.bay_eject2));
4444
4445 return (tp_features.bay_status || tp_features.bay_eject ||
4446 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4447 }
4448
4449 static void bay_notify(struct ibm_struct *ibm, u32 event)
4450 {
4451 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4452 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4453 dev_name(&ibm->acpi->device->dev),
4454 event, 0);
4455 }
4456
4457 #define bay_occupied(b) (_sta(b##_handle) & 1)
4458
4459 static int bay_read(char *p)
4460 {
4461 int len = 0;
4462 int occupied = bay_occupied(bay);
4463 int occupied2 = bay_occupied(bay2);
4464 int eject, eject2;
4465
4466 len += sprintf(p + len, "status:\t\t%s\n",
4467 tp_features.bay_status ?
4468 (occupied ? "occupied" : "unoccupied") :
4469 "not supported");
4470 if (tp_features.bay_status2)
4471 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4472 "occupied" : "unoccupied");
4473
4474 eject = tp_features.bay_eject && occupied;
4475 eject2 = tp_features.bay_eject2 && occupied2;
4476
4477 if (eject && eject2)
4478 len += sprintf(p + len, "commands:\teject, eject2\n");
4479 else if (eject)
4480 len += sprintf(p + len, "commands:\teject\n");
4481 else if (eject2)
4482 len += sprintf(p + len, "commands:\teject2\n");
4483
4484 return len;
4485 }
4486
4487 static int bay_write(char *buf)
4488 {
4489 char *cmd;
4490
4491 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4492 return -ENODEV;
4493
4494 while ((cmd = next_cmd(&buf))) {
4495 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4496 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4497 return -EIO;
4498 } else if (tp_features.bay_eject2 &&
4499 strlencmp(cmd, "eject2") == 0) {
4500 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4501 return -EIO;
4502 } else
4503 return -EINVAL;
4504 }
4505
4506 return 0;
4507 }
4508
4509 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4510 .notify = bay_notify,
4511 .handle = &bay_handle,
4512 .type = ACPI_SYSTEM_NOTIFY,
4513 };
4514
4515 static struct ibm_struct bay_driver_data = {
4516 .name = "bay",
4517 .read = bay_read,
4518 .write = bay_write,
4519 .acpi = &ibm_bay_acpidriver,
4520 };
4521
4522 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4523
4524 /*************************************************************************
4525 * CMOS subdriver
4526 */
4527
4528 /* sysfs cmos_command -------------------------------------------------- */
4529 static ssize_t cmos_command_store(struct device *dev,
4530 struct device_attribute *attr,
4531 const char *buf, size_t count)
4532 {
4533 unsigned long cmos_cmd;
4534 int res;
4535
4536 if (parse_strtoul(buf, 21, &cmos_cmd))
4537 return -EINVAL;
4538
4539 res = issue_thinkpad_cmos_command(cmos_cmd);
4540 return (res)? res : count;
4541 }
4542
4543 static struct device_attribute dev_attr_cmos_command =
4544 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4545
4546 /* --------------------------------------------------------------------- */
4547
4548 static int __init cmos_init(struct ibm_init_struct *iibm)
4549 {
4550 int res;
4551
4552 vdbg_printk(TPACPI_DBG_INIT,
4553 "initializing cmos commands subdriver\n");
4554
4555 TPACPI_ACPIHANDLE_INIT(cmos);
4556
4557 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4558 str_supported(cmos_handle != NULL));
4559
4560 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4561 if (res)
4562 return res;
4563
4564 return (cmos_handle)? 0 : 1;
4565 }
4566
4567 static void cmos_exit(void)
4568 {
4569 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4570 }
4571
4572 static int cmos_read(char *p)
4573 {
4574 int len = 0;
4575
4576 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4577 R30, R31, T20-22, X20-21 */
4578 if (!cmos_handle)
4579 len += sprintf(p + len, "status:\t\tnot supported\n");
4580 else {
4581 len += sprintf(p + len, "status:\t\tsupported\n");
4582 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4583 }
4584
4585 return len;
4586 }
4587
4588 static int cmos_write(char *buf)
4589 {
4590 char *cmd;
4591 int cmos_cmd, res;
4592
4593 while ((cmd = next_cmd(&buf))) {
4594 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4595 cmos_cmd >= 0 && cmos_cmd <= 21) {
4596 /* cmos_cmd set */
4597 } else
4598 return -EINVAL;
4599
4600 res = issue_thinkpad_cmos_command(cmos_cmd);
4601 if (res)
4602 return res;
4603 }
4604
4605 return 0;
4606 }
4607
4608 static struct ibm_struct cmos_driver_data = {
4609 .name = "cmos",
4610 .read = cmos_read,
4611 .write = cmos_write,
4612 .exit = cmos_exit,
4613 };
4614
4615 /*************************************************************************
4616 * LED subdriver
4617 */
4618
4619 enum led_access_mode {
4620 TPACPI_LED_NONE = 0,
4621 TPACPI_LED_570, /* 570 */
4622 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4623 TPACPI_LED_NEW, /* all others */
4624 };
4625
4626 enum { /* For TPACPI_LED_OLD */
4627 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4628 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4629 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4630 };
4631
4632 enum led_status_t {
4633 TPACPI_LED_OFF = 0,
4634 TPACPI_LED_ON,
4635 TPACPI_LED_BLINK,
4636 };
4637
4638 static enum led_access_mode led_supported;
4639
4640 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4641 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4642 /* T20-22, X20-21 */
4643 "LED", /* all others */
4644 ); /* R30, R31 */
4645
4646 #define TPACPI_LED_NUMLEDS 8
4647 static struct tpacpi_led_classdev *tpacpi_leds;
4648 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4649 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4650 /* there's a limit of 19 chars + NULL before 2.6.26 */
4651 "tpacpi::power",
4652 "tpacpi:orange:batt",
4653 "tpacpi:green:batt",
4654 "tpacpi::dock_active",
4655 "tpacpi::bay_active",
4656 "tpacpi::dock_batt",
4657 "tpacpi::unknown_led",
4658 "tpacpi::standby",
4659 };
4660 #define TPACPI_SAFE_LEDS 0x0081U
4661
4662 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4663 {
4664 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4665 return false;
4666 #else
4667 return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
4668 #endif
4669 }
4670
4671 static int led_get_status(const unsigned int led)
4672 {
4673 int status;
4674 enum led_status_t led_s;
4675
4676 switch (led_supported) {
4677 case TPACPI_LED_570:
4678 if (!acpi_evalf(ec_handle,
4679 &status, "GLED", "dd", 1 << led))
4680 return -EIO;
4681 led_s = (status == 0)?
4682 TPACPI_LED_OFF :
4683 ((status == 1)?
4684 TPACPI_LED_ON :
4685 TPACPI_LED_BLINK);
4686 tpacpi_led_state_cache[led] = led_s;
4687 return led_s;
4688 default:
4689 return -ENXIO;
4690 }
4691
4692 /* not reached */
4693 }
4694
4695 static int led_set_status(const unsigned int led,
4696 const enum led_status_t ledstatus)
4697 {
4698 /* off, on, blink. Index is led_status_t */
4699 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4700 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4701
4702 int rc = 0;
4703
4704 switch (led_supported) {
4705 case TPACPI_LED_570:
4706 /* 570 */
4707 if (unlikely(led > 7))
4708 return -EINVAL;
4709 if (unlikely(tpacpi_is_led_restricted(led)))
4710 return -EPERM;
4711 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4712 (1 << led), led_sled_arg1[ledstatus]))
4713 rc = -EIO;
4714 break;
4715 case TPACPI_LED_OLD:
4716 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4717 if (unlikely(led > 7))
4718 return -EINVAL;
4719 if (unlikely(tpacpi_is_led_restricted(led)))
4720 return -EPERM;
4721 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4722 if (rc >= 0)
4723 rc = ec_write(TPACPI_LED_EC_HLBL,
4724 (ledstatus == TPACPI_LED_BLINK) << led);
4725 if (rc >= 0)
4726 rc = ec_write(TPACPI_LED_EC_HLCL,
4727 (ledstatus != TPACPI_LED_OFF) << led);
4728 break;
4729 case TPACPI_LED_NEW:
4730 /* all others */
4731 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4732 return -EINVAL;
4733 if (unlikely(tpacpi_is_led_restricted(led)))
4734 return -EPERM;
4735 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4736 led, led_led_arg1[ledstatus]))
4737 rc = -EIO;
4738 break;
4739 default:
4740 rc = -ENXIO;
4741 }
4742
4743 if (!rc)
4744 tpacpi_led_state_cache[led] = ledstatus;
4745
4746 return rc;
4747 }
4748
4749 static void led_sysfs_set_status(unsigned int led,
4750 enum led_brightness brightness)
4751 {
4752 led_set_status(led,
4753 (brightness == LED_OFF) ?
4754 TPACPI_LED_OFF :
4755 (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4756 TPACPI_LED_BLINK : TPACPI_LED_ON);
4757 }
4758
4759 static void led_set_status_worker(struct work_struct *work)
4760 {
4761 struct tpacpi_led_classdev *data =
4762 container_of(work, struct tpacpi_led_classdev, work);
4763
4764 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4765 led_sysfs_set_status(data->led, data->new_brightness);
4766 }
4767
4768 static void led_sysfs_set(struct led_classdev *led_cdev,
4769 enum led_brightness brightness)
4770 {
4771 struct tpacpi_led_classdev *data = container_of(led_cdev,
4772 struct tpacpi_led_classdev, led_classdev);
4773
4774 data->new_brightness = brightness;
4775 queue_work(tpacpi_wq, &data->work);
4776 }
4777
4778 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4779 unsigned long *delay_on, unsigned long *delay_off)
4780 {
4781 struct tpacpi_led_classdev *data = container_of(led_cdev,
4782 struct tpacpi_led_classdev, led_classdev);
4783
4784 /* Can we choose the flash rate? */
4785 if (*delay_on == 0 && *delay_off == 0) {
4786 /* yes. set them to the hardware blink rate (1 Hz) */
4787 *delay_on = 500; /* ms */
4788 *delay_off = 500; /* ms */
4789 } else if ((*delay_on != 500) || (*delay_off != 500))
4790 return -EINVAL;
4791
4792 data->new_brightness = TPACPI_LED_BLINK;
4793 queue_work(tpacpi_wq, &data->work);
4794
4795 return 0;
4796 }
4797
4798 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4799 {
4800 int rc;
4801
4802 struct tpacpi_led_classdev *data = container_of(led_cdev,
4803 struct tpacpi_led_classdev, led_classdev);
4804
4805 rc = led_get_status(data->led);
4806
4807 if (rc == TPACPI_LED_OFF || rc < 0)
4808 rc = LED_OFF; /* no error handling in led class :( */
4809 else
4810 rc = LED_FULL;
4811
4812 return rc;
4813 }
4814
4815 static void led_exit(void)
4816 {
4817 unsigned int i;
4818
4819 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4820 if (tpacpi_leds[i].led_classdev.name)
4821 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4822 }
4823
4824 kfree(tpacpi_leds);
4825 }
4826
4827 static int __init tpacpi_init_led(unsigned int led)
4828 {
4829 int rc;
4830
4831 tpacpi_leds[led].led = led;
4832
4833 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4834 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4835 if (led_supported == TPACPI_LED_570)
4836 tpacpi_leds[led].led_classdev.brightness_get =
4837 &led_sysfs_get;
4838
4839 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4840
4841 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4842
4843 rc = led_classdev_register(&tpacpi_pdev->dev,
4844 &tpacpi_leds[led].led_classdev);
4845 if (rc < 0)
4846 tpacpi_leds[led].led_classdev.name = NULL;
4847
4848 return rc;
4849 }
4850
4851 static int __init led_init(struct ibm_init_struct *iibm)
4852 {
4853 unsigned int i;
4854 int rc;
4855
4856 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4857
4858 TPACPI_ACPIHANDLE_INIT(led);
4859
4860 if (!led_handle)
4861 /* led not supported on R30, R31 */
4862 led_supported = TPACPI_LED_NONE;
4863 else if (strlencmp(led_path, "SLED") == 0)
4864 /* 570 */
4865 led_supported = TPACPI_LED_570;
4866 else if (strlencmp(led_path, "SYSL") == 0)
4867 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4868 led_supported = TPACPI_LED_OLD;
4869 else
4870 /* all others */
4871 led_supported = TPACPI_LED_NEW;
4872
4873 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4874 str_supported(led_supported), led_supported);
4875
4876 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4877 GFP_KERNEL);
4878 if (!tpacpi_leds) {
4879 printk(TPACPI_ERR "Out of memory for LED data\n");
4880 return -ENOMEM;
4881 }
4882
4883 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4884 if (!tpacpi_is_led_restricted(i)) {
4885 rc = tpacpi_init_led(i);
4886 if (rc < 0) {
4887 led_exit();
4888 return rc;
4889 }
4890 }
4891 }
4892
4893 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4894 if (led_supported != TPACPI_LED_NONE)
4895 printk(TPACPI_NOTICE
4896 "warning: userspace override of important "
4897 "firmware LEDs is enabled\n");
4898 #endif
4899 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4900 }
4901
4902 #define str_led_status(s) \
4903 ((s) == TPACPI_LED_OFF ? "off" : \
4904 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4905
4906 static int led_read(char *p)
4907 {
4908 int len = 0;
4909
4910 if (!led_supported) {
4911 len += sprintf(p + len, "status:\t\tnot supported\n");
4912 return len;
4913 }
4914 len += sprintf(p + len, "status:\t\tsupported\n");
4915
4916 if (led_supported == TPACPI_LED_570) {
4917 /* 570 */
4918 int i, status;
4919 for (i = 0; i < 8; i++) {
4920 status = led_get_status(i);
4921 if (status < 0)
4922 return -EIO;
4923 len += sprintf(p + len, "%d:\t\t%s\n",
4924 i, str_led_status(status));
4925 }
4926 }
4927
4928 len += sprintf(p + len, "commands:\t"
4929 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4930
4931 return len;
4932 }
4933
4934 static int led_write(char *buf)
4935 {
4936 char *cmd;
4937 int led, rc;
4938 enum led_status_t s;
4939
4940 if (!led_supported)
4941 return -ENODEV;
4942
4943 while ((cmd = next_cmd(&buf))) {
4944 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4945 return -EINVAL;
4946
4947 if (strstr(cmd, "off")) {
4948 s = TPACPI_LED_OFF;
4949 } else if (strstr(cmd, "on")) {
4950 s = TPACPI_LED_ON;
4951 } else if (strstr(cmd, "blink")) {
4952 s = TPACPI_LED_BLINK;
4953 } else {
4954 return -EINVAL;
4955 }
4956
4957 rc = led_set_status(led, s);
4958 if (rc < 0)
4959 return rc;
4960 }
4961
4962 return 0;
4963 }
4964
4965 static struct ibm_struct led_driver_data = {
4966 .name = "led",
4967 .read = led_read,
4968 .write = led_write,
4969 .exit = led_exit,
4970 };
4971
4972 /*************************************************************************
4973 * Beep subdriver
4974 */
4975
4976 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
4977
4978 static int __init beep_init(struct ibm_init_struct *iibm)
4979 {
4980 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4981
4982 TPACPI_ACPIHANDLE_INIT(beep);
4983
4984 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4985 str_supported(beep_handle != NULL));
4986
4987 return (beep_handle)? 0 : 1;
4988 }
4989
4990 static int beep_read(char *p)
4991 {
4992 int len = 0;
4993
4994 if (!beep_handle)
4995 len += sprintf(p + len, "status:\t\tnot supported\n");
4996 else {
4997 len += sprintf(p + len, "status:\t\tsupported\n");
4998 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4999 }
5000
5001 return len;
5002 }
5003
5004 static int beep_write(char *buf)
5005 {
5006 char *cmd;
5007 int beep_cmd;
5008
5009 if (!beep_handle)
5010 return -ENODEV;
5011
5012 while ((cmd = next_cmd(&buf))) {
5013 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5014 beep_cmd >= 0 && beep_cmd <= 17) {
5015 /* beep_cmd set */
5016 } else
5017 return -EINVAL;
5018 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
5019 return -EIO;
5020 }
5021
5022 return 0;
5023 }
5024
5025 static struct ibm_struct beep_driver_data = {
5026 .name = "beep",
5027 .read = beep_read,
5028 .write = beep_write,
5029 };
5030
5031 /*************************************************************************
5032 * Thermal subdriver
5033 */
5034
5035 enum thermal_access_mode {
5036 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5037 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5038 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5039 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5040 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5041 };
5042
5043 enum { /* TPACPI_THERMAL_TPEC_* */
5044 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5045 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5046 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5047 };
5048
5049 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5050 struct ibm_thermal_sensors_struct {
5051 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5052 };
5053
5054 static enum thermal_access_mode thermal_read_mode;
5055
5056 /* idx is zero-based */
5057 static int thermal_get_sensor(int idx, s32 *value)
5058 {
5059 int t;
5060 s8 tmp;
5061 char tmpi[5];
5062
5063 t = TP_EC_THERMAL_TMP0;
5064
5065 switch (thermal_read_mode) {
5066 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5067 case TPACPI_THERMAL_TPEC_16:
5068 if (idx >= 8 && idx <= 15) {
5069 t = TP_EC_THERMAL_TMP8;
5070 idx -= 8;
5071 }
5072 /* fallthrough */
5073 #endif
5074 case TPACPI_THERMAL_TPEC_8:
5075 if (idx <= 7) {
5076 if (!acpi_ec_read(t + idx, &tmp))
5077 return -EIO;
5078 *value = tmp * 1000;
5079 return 0;
5080 }
5081 break;
5082
5083 case TPACPI_THERMAL_ACPI_UPDT:
5084 if (idx <= 7) {
5085 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5086 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5087 return -EIO;
5088 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5089 return -EIO;
5090 *value = (t - 2732) * 100;
5091 return 0;
5092 }
5093 break;
5094
5095 case TPACPI_THERMAL_ACPI_TMP07:
5096 if (idx <= 7) {
5097 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5098 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5099 return -EIO;
5100 if (t > 127 || t < -127)
5101 t = TP_EC_THERMAL_TMP_NA;
5102 *value = t * 1000;
5103 return 0;
5104 }
5105 break;
5106
5107 case TPACPI_THERMAL_NONE:
5108 default:
5109 return -ENOSYS;
5110 }
5111
5112 return -EINVAL;
5113 }
5114
5115 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5116 {
5117 int res, i;
5118 int n;
5119
5120 n = 8;
5121 i = 0;
5122
5123 if (!s)
5124 return -EINVAL;
5125
5126 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5127 n = 16;
5128
5129 for (i = 0 ; i < n; i++) {
5130 res = thermal_get_sensor(i, &s->temp[i]);
5131 if (res)
5132 return res;
5133 }
5134
5135 return n;
5136 }
5137
5138 /* sysfs temp##_input -------------------------------------------------- */
5139
5140 static ssize_t thermal_temp_input_show(struct device *dev,
5141 struct device_attribute *attr,
5142 char *buf)
5143 {
5144 struct sensor_device_attribute *sensor_attr =
5145 to_sensor_dev_attr(attr);
5146 int idx = sensor_attr->index;
5147 s32 value;
5148 int res;
5149
5150 res = thermal_get_sensor(idx, &value);
5151 if (res)
5152 return res;
5153 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5154 return -ENXIO;
5155
5156 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5157 }
5158
5159 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5160 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5161 thermal_temp_input_show, NULL, _idxB)
5162
5163 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5164 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5165 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5166 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5167 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5168 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5169 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5170 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5171 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5172 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5173 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5174 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5175 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5176 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5177 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5178 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5179 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5180 };
5181
5182 #define THERMAL_ATTRS(X) \
5183 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5184
5185 static struct attribute *thermal_temp_input_attr[] = {
5186 THERMAL_ATTRS(8),
5187 THERMAL_ATTRS(9),
5188 THERMAL_ATTRS(10),
5189 THERMAL_ATTRS(11),
5190 THERMAL_ATTRS(12),
5191 THERMAL_ATTRS(13),
5192 THERMAL_ATTRS(14),
5193 THERMAL_ATTRS(15),
5194 THERMAL_ATTRS(0),
5195 THERMAL_ATTRS(1),
5196 THERMAL_ATTRS(2),
5197 THERMAL_ATTRS(3),
5198 THERMAL_ATTRS(4),
5199 THERMAL_ATTRS(5),
5200 THERMAL_ATTRS(6),
5201 THERMAL_ATTRS(7),
5202 NULL
5203 };
5204
5205 static const struct attribute_group thermal_temp_input16_group = {
5206 .attrs = thermal_temp_input_attr
5207 };
5208
5209 static const struct attribute_group thermal_temp_input8_group = {
5210 .attrs = &thermal_temp_input_attr[8]
5211 };
5212
5213 #undef THERMAL_SENSOR_ATTR_TEMP
5214 #undef THERMAL_ATTRS
5215
5216 /* --------------------------------------------------------------------- */
5217
5218 static int __init thermal_init(struct ibm_init_struct *iibm)
5219 {
5220 u8 t, ta1, ta2;
5221 int i;
5222 int acpi_tmp7;
5223 int res;
5224
5225 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5226
5227 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5228
5229 if (thinkpad_id.ec_model) {
5230 /*
5231 * Direct EC access mode: sensors at registers
5232 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5233 * non-implemented, thermal sensors return 0x80 when
5234 * not available
5235 */
5236
5237 ta1 = ta2 = 0;
5238 for (i = 0; i < 8; i++) {
5239 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5240 ta1 |= t;
5241 } else {
5242 ta1 = 0;
5243 break;
5244 }
5245 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5246 ta2 |= t;
5247 } else {
5248 ta1 = 0;
5249 break;
5250 }
5251 }
5252 if (ta1 == 0) {
5253 /* This is sheer paranoia, but we handle it anyway */
5254 if (acpi_tmp7) {
5255 printk(TPACPI_ERR
5256 "ThinkPad ACPI EC access misbehaving, "
5257 "falling back to ACPI TMPx access "
5258 "mode\n");
5259 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5260 } else {
5261 printk(TPACPI_ERR
5262 "ThinkPad ACPI EC access misbehaving, "
5263 "disabling thermal sensors access\n");
5264 thermal_read_mode = TPACPI_THERMAL_NONE;
5265 }
5266 } else {
5267 thermal_read_mode =
5268 (ta2 != 0) ?
5269 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5270 }
5271 } else if (acpi_tmp7) {
5272 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5273 /* 600e/x, 770e, 770x */
5274 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5275 } else {
5276 /* Standard ACPI TMPx access, max 8 sensors */
5277 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5278 }
5279 } else {
5280 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5281 thermal_read_mode = TPACPI_THERMAL_NONE;
5282 }
5283
5284 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5285 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5286 thermal_read_mode);
5287
5288 switch (thermal_read_mode) {
5289 case TPACPI_THERMAL_TPEC_16:
5290 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5291 &thermal_temp_input16_group);
5292 if (res)
5293 return res;
5294 break;
5295 case TPACPI_THERMAL_TPEC_8:
5296 case TPACPI_THERMAL_ACPI_TMP07:
5297 case TPACPI_THERMAL_ACPI_UPDT:
5298 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5299 &thermal_temp_input8_group);
5300 if (res)
5301 return res;
5302 break;
5303 case TPACPI_THERMAL_NONE:
5304 default:
5305 return 1;
5306 }
5307
5308 return 0;
5309 }
5310
5311 static void thermal_exit(void)
5312 {
5313 switch (thermal_read_mode) {
5314 case TPACPI_THERMAL_TPEC_16:
5315 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5316 &thermal_temp_input16_group);
5317 break;
5318 case TPACPI_THERMAL_TPEC_8:
5319 case TPACPI_THERMAL_ACPI_TMP07:
5320 case TPACPI_THERMAL_ACPI_UPDT:
5321 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5322 &thermal_temp_input16_group);
5323 break;
5324 case TPACPI_THERMAL_NONE:
5325 default:
5326 break;
5327 }
5328 }
5329
5330 static int thermal_read(char *p)
5331 {
5332 int len = 0;
5333 int n, i;
5334 struct ibm_thermal_sensors_struct t;
5335
5336 n = thermal_get_sensors(&t);
5337 if (unlikely(n < 0))
5338 return n;
5339
5340 len += sprintf(p + len, "temperatures:\t");
5341
5342 if (n > 0) {
5343 for (i = 0; i < (n - 1); i++)
5344 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5345 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5346 } else
5347 len += sprintf(p + len, "not supported\n");
5348
5349 return len;
5350 }
5351
5352 static struct ibm_struct thermal_driver_data = {
5353 .name = "thermal",
5354 .read = thermal_read,
5355 .exit = thermal_exit,
5356 };
5357
5358 /*************************************************************************
5359 * EC Dump subdriver
5360 */
5361
5362 static u8 ecdump_regs[256];
5363
5364 static int ecdump_read(char *p)
5365 {
5366 int len = 0;
5367 int i, j;
5368 u8 v;
5369
5370 len += sprintf(p + len, "EC "
5371 " +00 +01 +02 +03 +04 +05 +06 +07"
5372 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5373 for (i = 0; i < 256; i += 16) {
5374 len += sprintf(p + len, "EC 0x%02x:", i);
5375 for (j = 0; j < 16; j++) {
5376 if (!acpi_ec_read(i + j, &v))
5377 break;
5378 if (v != ecdump_regs[i + j])
5379 len += sprintf(p + len, " *%02x", v);
5380 else
5381 len += sprintf(p + len, " %02x", v);
5382 ecdump_regs[i + j] = v;
5383 }
5384 len += sprintf(p + len, "\n");
5385 if (j != 16)
5386 break;
5387 }
5388
5389 /* These are way too dangerous to advertise openly... */
5390 #if 0
5391 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5392 " (<offset> is 00-ff, <value> is 00-ff)\n");
5393 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5394 " (<offset> is 00-ff, <value> is 0-255)\n");
5395 #endif
5396 return len;
5397 }
5398
5399 static int ecdump_write(char *buf)
5400 {
5401 char *cmd;
5402 int i, v;
5403
5404 while ((cmd = next_cmd(&buf))) {
5405 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5406 /* i and v set */
5407 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5408 /* i and v set */
5409 } else
5410 return -EINVAL;
5411 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5412 if (!acpi_ec_write(i, v))
5413 return -EIO;
5414 } else
5415 return -EINVAL;
5416 }
5417
5418 return 0;
5419 }
5420
5421 static struct ibm_struct ecdump_driver_data = {
5422 .name = "ecdump",
5423 .read = ecdump_read,
5424 .write = ecdump_write,
5425 .flags.experimental = 1,
5426 };
5427
5428 /*************************************************************************
5429 * Backlight/brightness subdriver
5430 */
5431
5432 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5433
5434 enum {
5435 TP_EC_BACKLIGHT = 0x31,
5436
5437 /* TP_EC_BACKLIGHT bitmasks */
5438 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5439 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5440 TP_EC_BACKLIGHT_MAPSW = 0x20,
5441 };
5442
5443 static struct backlight_device *ibm_backlight_device;
5444 static int brightness_mode;
5445 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5446
5447 static struct mutex brightness_mutex;
5448
5449 /*
5450 * ThinkPads can read brightness from two places: EC 0x31, or
5451 * CMOS NVRAM byte 0x5E, bits 0-3.
5452 *
5453 * EC 0x31 has the following layout
5454 * Bit 7: unknown function
5455 * Bit 6: unknown function
5456 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5457 * Bit 4: must be set to zero to avoid problems
5458 * Bit 3-0: backlight brightness level
5459 *
5460 * brightness_get_raw returns status data in the EC 0x31 layout
5461 */
5462 static int brightness_get_raw(int *status)
5463 {
5464 u8 lec = 0, lcmos = 0, level = 0;
5465
5466 if (brightness_mode & 1) {
5467 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5468 return -EIO;
5469 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5470 };
5471 if (brightness_mode & 2) {
5472 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5473 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5474 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5475 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5476 level = lcmos;
5477 }
5478
5479 if (brightness_mode == 3) {
5480 *status = lec; /* Prefer EC, CMOS is just a backing store */
5481 lec &= TP_EC_BACKLIGHT_LVLMSK;
5482 if (lec == lcmos)
5483 tp_warned.bright_cmos_ec_unsync = 0;
5484 else {
5485 if (!tp_warned.bright_cmos_ec_unsync) {
5486 printk(TPACPI_ERR
5487 "CMOS NVRAM (%u) and EC (%u) do not "
5488 "agree on display brightness level\n",
5489 (unsigned int) lcmos,
5490 (unsigned int) lec);
5491 tp_warned.bright_cmos_ec_unsync = 1;
5492 }
5493 return -EIO;
5494 }
5495 } else {
5496 *status = level;
5497 }
5498
5499 return 0;
5500 }
5501
5502 /* May return EINTR which can always be mapped to ERESTARTSYS */
5503 static int brightness_set(int value)
5504 {
5505 int cmos_cmd, inc, i, res;
5506 int current_value;
5507 int command_bits;
5508
5509 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5510 value < 0)
5511 return -EINVAL;
5512
5513 res = mutex_lock_killable(&brightness_mutex);
5514 if (res < 0)
5515 return res;
5516
5517 res = brightness_get_raw(&current_value);
5518 if (res < 0)
5519 goto errout;
5520
5521 command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5522 current_value &= TP_EC_BACKLIGHT_LVLMSK;
5523
5524 cmos_cmd = value > current_value ?
5525 TP_CMOS_BRIGHTNESS_UP :
5526 TP_CMOS_BRIGHTNESS_DOWN;
5527 inc = (value > current_value)? 1 : -1;
5528
5529 res = 0;
5530 for (i = current_value; i != value; i += inc) {
5531 if ((brightness_mode & 2) &&
5532 issue_thinkpad_cmos_command(cmos_cmd)) {
5533 res = -EIO;
5534 goto errout;
5535 }
5536 if ((brightness_mode & 1) &&
5537 !acpi_ec_write(TP_EC_BACKLIGHT,
5538 (i + inc) | command_bits)) {
5539 res = -EIO;
5540 goto errout;;
5541 }
5542 }
5543
5544 errout:
5545 mutex_unlock(&brightness_mutex);
5546 return res;
5547 }
5548
5549 /* sysfs backlight class ----------------------------------------------- */
5550
5551 static int brightness_update_status(struct backlight_device *bd)
5552 {
5553 /* it is the backlight class's job (caller) to handle
5554 * EINTR and other errors properly */
5555 return brightness_set(
5556 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5557 bd->props.power == FB_BLANK_UNBLANK) ?
5558 bd->props.brightness : 0);
5559 }
5560
5561 static int brightness_get(struct backlight_device *bd)
5562 {
5563 int status, res;
5564
5565 res = brightness_get_raw(&status);
5566 if (res < 0)
5567 return 0; /* FIXME: teach backlight about error handling */
5568
5569 return status & TP_EC_BACKLIGHT_LVLMSK;
5570 }
5571
5572 static struct backlight_ops ibm_backlight_data = {
5573 .get_brightness = brightness_get,
5574 .update_status = brightness_update_status,
5575 };
5576
5577 /* --------------------------------------------------------------------- */
5578
5579 static int __init brightness_init(struct ibm_init_struct *iibm)
5580 {
5581 int b;
5582
5583 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5584
5585 mutex_init(&brightness_mutex);
5586
5587 /*
5588 * We always attempt to detect acpi support, so as to switch
5589 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5590 * going to publish a backlight interface
5591 */
5592 b = tpacpi_check_std_acpi_brightness_support();
5593 if (b > 0) {
5594 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
5595 printk(TPACPI_NOTICE
5596 "Lenovo BIOS switched to ACPI backlight "
5597 "control mode\n");
5598 }
5599 if (brightness_enable > 1) {
5600 printk(TPACPI_NOTICE
5601 "standard ACPI backlight interface "
5602 "available, not loading native one...\n");
5603 return 1;
5604 }
5605 }
5606
5607 if (!brightness_enable) {
5608 dbg_printk(TPACPI_DBG_INIT,
5609 "brightness support disabled by "
5610 "module parameter\n");
5611 return 1;
5612 }
5613
5614 if (b > 16) {
5615 printk(TPACPI_ERR
5616 "Unsupported brightness interface, "
5617 "please contact %s\n", TPACPI_MAIL);
5618 return 1;
5619 }
5620 if (b == 16)
5621 tp_features.bright_16levels = 1;
5622
5623 if (!brightness_mode) {
5624 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5625 brightness_mode = 2;
5626 else
5627 brightness_mode = 3;
5628
5629 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5630 brightness_mode);
5631 }
5632
5633 if (brightness_mode > 3)
5634 return -EINVAL;
5635
5636 if (brightness_get_raw(&b) < 0)
5637 return 1;
5638
5639 if (tp_features.bright_16levels)
5640 printk(TPACPI_INFO
5641 "detected a 16-level brightness capable ThinkPad\n");
5642
5643 ibm_backlight_device = backlight_device_register(
5644 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5645 &ibm_backlight_data);
5646 if (IS_ERR(ibm_backlight_device)) {
5647 printk(TPACPI_ERR "Could not register backlight device\n");
5648 return PTR_ERR(ibm_backlight_device);
5649 }
5650 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5651
5652 ibm_backlight_device->props.max_brightness =
5653 (tp_features.bright_16levels)? 15 : 7;
5654 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5655 backlight_update_status(ibm_backlight_device);
5656
5657 return 0;
5658 }
5659
5660 static void brightness_exit(void)
5661 {
5662 if (ibm_backlight_device) {
5663 vdbg_printk(TPACPI_DBG_EXIT,
5664 "calling backlight_device_unregister()\n");
5665 backlight_device_unregister(ibm_backlight_device);
5666 }
5667 }
5668
5669 static int brightness_read(char *p)
5670 {
5671 int len = 0;
5672 int level;
5673
5674 level = brightness_get(NULL);
5675 if (level < 0) {
5676 len += sprintf(p + len, "level:\t\tunreadable\n");
5677 } else {
5678 len += sprintf(p + len, "level:\t\t%d\n", level);
5679 len += sprintf(p + len, "commands:\tup, down\n");
5680 len += sprintf(p + len, "commands:\tlevel <level>"
5681 " (<level> is 0-%d)\n",
5682 (tp_features.bright_16levels) ? 15 : 7);
5683 }
5684
5685 return len;
5686 }
5687
5688 static int brightness_write(char *buf)
5689 {
5690 int level;
5691 int rc;
5692 char *cmd;
5693 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5694
5695 level = brightness_get(NULL);
5696 if (level < 0)
5697 return level;
5698
5699 while ((cmd = next_cmd(&buf))) {
5700 if (strlencmp(cmd, "up") == 0) {
5701 if (level < max_level)
5702 level++;
5703 } else if (strlencmp(cmd, "down") == 0) {
5704 if (level > 0)
5705 level--;
5706 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5707 level >= 0 && level <= max_level) {
5708 /* new level set */
5709 } else
5710 return -EINVAL;
5711 }
5712
5713 /*
5714 * Now we know what the final level should be, so we try to set it.
5715 * Doing it this way makes the syscall restartable in case of EINTR
5716 */
5717 rc = brightness_set(level);
5718 return (rc == -EINTR)? ERESTARTSYS : rc;
5719 }
5720
5721 static struct ibm_struct brightness_driver_data = {
5722 .name = "brightness",
5723 .read = brightness_read,
5724 .write = brightness_write,
5725 .exit = brightness_exit,
5726 };
5727
5728 /*************************************************************************
5729 * Volume subdriver
5730 */
5731
5732 static int volume_offset = 0x30;
5733
5734 static int volume_read(char *p)
5735 {
5736 int len = 0;
5737 u8 level;
5738
5739 if (!acpi_ec_read(volume_offset, &level)) {
5740 len += sprintf(p + len, "level:\t\tunreadable\n");
5741 } else {
5742 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5743 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5744 len += sprintf(p + len, "commands:\tup, down, mute\n");
5745 len += sprintf(p + len, "commands:\tlevel <level>"
5746 " (<level> is 0-15)\n");
5747 }
5748
5749 return len;
5750 }
5751
5752 static int volume_write(char *buf)
5753 {
5754 int cmos_cmd, inc, i;
5755 u8 level, mute;
5756 int new_level, new_mute;
5757 char *cmd;
5758
5759 while ((cmd = next_cmd(&buf))) {
5760 if (!acpi_ec_read(volume_offset, &level))
5761 return -EIO;
5762 new_mute = mute = level & 0x40;
5763 new_level = level = level & 0xf;
5764
5765 if (strlencmp(cmd, "up") == 0) {
5766 if (mute)
5767 new_mute = 0;
5768 else
5769 new_level = level == 15 ? 15 : level + 1;
5770 } else if (strlencmp(cmd, "down") == 0) {
5771 if (mute)
5772 new_mute = 0;
5773 else
5774 new_level = level == 0 ? 0 : level - 1;
5775 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5776 new_level >= 0 && new_level <= 15) {
5777 /* new_level set */
5778 } else if (strlencmp(cmd, "mute") == 0) {
5779 new_mute = 0x40;
5780 } else
5781 return -EINVAL;
5782
5783 if (new_level != level) {
5784 /* mute doesn't change */
5785
5786 cmos_cmd = (new_level > level) ?
5787 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5788 inc = new_level > level ? 1 : -1;
5789
5790 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5791 !acpi_ec_write(volume_offset, level)))
5792 return -EIO;
5793
5794 for (i = level; i != new_level; i += inc)
5795 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5796 !acpi_ec_write(volume_offset, i + inc))
5797 return -EIO;
5798
5799 if (mute &&
5800 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5801 !acpi_ec_write(volume_offset, new_level + mute))) {
5802 return -EIO;
5803 }
5804 }
5805
5806 if (new_mute != mute) {
5807 /* level doesn't change */
5808
5809 cmos_cmd = (new_mute) ?
5810 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5811
5812 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5813 !acpi_ec_write(volume_offset, level + new_mute))
5814 return -EIO;
5815 }
5816 }
5817
5818 return 0;
5819 }
5820
5821 static struct ibm_struct volume_driver_data = {
5822 .name = "volume",
5823 .read = volume_read,
5824 .write = volume_write,
5825 };
5826
5827 /*************************************************************************
5828 * Fan subdriver
5829 */
5830
5831 /*
5832 * FAN ACCESS MODES
5833 *
5834 * TPACPI_FAN_RD_ACPI_GFAN:
5835 * ACPI GFAN method: returns fan level
5836 *
5837 * see TPACPI_FAN_WR_ACPI_SFAN
5838 * EC 0x2f (HFSP) not available if GFAN exists
5839 *
5840 * TPACPI_FAN_WR_ACPI_SFAN:
5841 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5842 *
5843 * EC 0x2f (HFSP) might be available *for reading*, but do not use
5844 * it for writing.
5845 *
5846 * TPACPI_FAN_WR_TPEC:
5847 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
5848 * Supported on almost all ThinkPads
5849 *
5850 * Fan speed changes of any sort (including those caused by the
5851 * disengaged mode) are usually done slowly by the firmware as the
5852 * maximum ammount of fan duty cycle change per second seems to be
5853 * limited.
5854 *
5855 * Reading is not available if GFAN exists.
5856 * Writing is not available if SFAN exists.
5857 *
5858 * Bits
5859 * 7 automatic mode engaged;
5860 * (default operation mode of the ThinkPad)
5861 * fan level is ignored in this mode.
5862 * 6 full speed mode (takes precedence over bit 7);
5863 * not available on all thinkpads. May disable
5864 * the tachometer while the fan controller ramps up
5865 * the speed (which can take up to a few *minutes*).
5866 * Speeds up fan to 100% duty-cycle, which is far above
5867 * the standard RPM levels. It is not impossible that
5868 * it could cause hardware damage.
5869 * 5-3 unused in some models. Extra bits for fan level
5870 * in others, but still useless as all values above
5871 * 7 map to the same speed as level 7 in these models.
5872 * 2-0 fan level (0..7 usually)
5873 * 0x00 = stop
5874 * 0x07 = max (set when temperatures critical)
5875 * Some ThinkPads may have other levels, see
5876 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5877 *
5878 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5879 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5880 * does so, its initial value is meaningless (0x07).
5881 *
5882 * For firmware bugs, refer to:
5883 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5884 *
5885 * ----
5886 *
5887 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5888 * Main fan tachometer reading (in RPM)
5889 *
5890 * This register is present on all ThinkPads with a new-style EC, and
5891 * it is known not to be present on the A21m/e, and T22, as there is
5892 * something else in offset 0x84 according to the ACPI DSDT. Other
5893 * ThinkPads from this same time period (and earlier) probably lack the
5894 * tachometer as well.
5895 *
5896 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
5897 * was never fixed by IBM to report the EC firmware version string
5898 * probably support the tachometer (like the early X models), so
5899 * detecting it is quite hard. We need more data to know for sure.
5900 *
5901 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5902 * might result.
5903 *
5904 * FIRMWARE BUG: may go stale while the EC is switching to full speed
5905 * mode.
5906 *
5907 * For firmware bugs, refer to:
5908 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5909 *
5910 * TPACPI_FAN_WR_ACPI_FANS:
5911 * ThinkPad X31, X40, X41. Not available in the X60.
5912 *
5913 * FANS ACPI handle: takes three arguments: low speed, medium speed,
5914 * high speed. ACPI DSDT seems to map these three speeds to levels
5915 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5916 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5917 *
5918 * The speeds are stored on handles
5919 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5920 *
5921 * There are three default speed sets, acessible as handles:
5922 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5923 *
5924 * ACPI DSDT switches which set is in use depending on various
5925 * factors.
5926 *
5927 * TPACPI_FAN_WR_TPEC is also available and should be used to
5928 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
5929 * but the ACPI tables just mention level 7.
5930 */
5931
5932 enum { /* Fan control constants */
5933 fan_status_offset = 0x2f, /* EC register 0x2f */
5934 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
5935 * 0x84 must be read before 0x85 */
5936
5937 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
5938 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
5939
5940 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
5941 };
5942
5943 enum fan_status_access_mode {
5944 TPACPI_FAN_NONE = 0, /* No fan status or control */
5945 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
5946 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5947 };
5948
5949 enum fan_control_access_mode {
5950 TPACPI_FAN_WR_NONE = 0, /* No fan control */
5951 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
5952 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
5953 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
5954 };
5955
5956 enum fan_control_commands {
5957 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
5958 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
5959 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
5960 * and also watchdog cmd */
5961 };
5962
5963 static int fan_control_allowed;
5964
5965 static enum fan_status_access_mode fan_status_access_mode;
5966 static enum fan_control_access_mode fan_control_access_mode;
5967 static enum fan_control_commands fan_control_commands;
5968
5969 static u8 fan_control_initial_status;
5970 static u8 fan_control_desired_level;
5971 static u8 fan_control_resume_level;
5972 static int fan_watchdog_maxinterval;
5973
5974 static struct mutex fan_mutex;
5975
5976 static void fan_watchdog_fire(struct work_struct *ignored);
5977 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5978
5979 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
5980 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5981 "\\FSPD", /* 600e/x, 770e, 770x */
5982 ); /* all others */
5983 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5984 "JFNS", /* 770x-JL */
5985 ); /* all others */
5986
5987 /*
5988 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
5989 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
5990 * be in auto mode (0x80).
5991 *
5992 * This is corrected by any write to HFSP either by the driver, or
5993 * by the firmware.
5994 *
5995 * We assume 0x07 really means auto mode while this quirk is active,
5996 * as this is far more likely than the ThinkPad being in level 7,
5997 * which is only used by the firmware during thermal emergencies.
5998 */
5999
6000 static void fan_quirk1_detect(void)
6001 {
6002 /* In some ThinkPads, neither the EC nor the ACPI
6003 * DSDT initialize the HFSP register, and it ends up
6004 * being initially set to 0x07 when it *could* be
6005 * either 0x07 or 0x80.
6006 *
6007 * Enable for TP-1Y (T43), TP-78 (R51e),
6008 * TP-76 (R52), TP-70 (T43, R52), which are known
6009 * to be buggy. */
6010 if (fan_control_initial_status == 0x07) {
6011 switch (thinkpad_id.ec_model) {
6012 case 0x5931: /* TP-1Y */
6013 case 0x3837: /* TP-78 */
6014 case 0x3637: /* TP-76 */
6015 case 0x3037: /* TP-70 */
6016 printk(TPACPI_NOTICE
6017 "fan_init: initial fan status is unknown, "
6018 "assuming it is in auto mode\n");
6019 tp_features.fan_ctrl_status_undef = 1;
6020 ;;
6021 }
6022 }
6023 }
6024
6025 static void fan_quirk1_handle(u8 *fan_status)
6026 {
6027 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6028 if (*fan_status != fan_control_initial_status) {
6029 /* something changed the HFSP regisnter since
6030 * driver init time, so it is not undefined
6031 * anymore */
6032 tp_features.fan_ctrl_status_undef = 0;
6033 } else {
6034 /* Return most likely status. In fact, it
6035 * might be the only possible status */
6036 *fan_status = TP_EC_FAN_AUTO;
6037 }
6038 }
6039 }
6040
6041 /*
6042 * Call with fan_mutex held
6043 */
6044 static void fan_update_desired_level(u8 status)
6045 {
6046 if ((status &
6047 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6048 if (status > 7)
6049 fan_control_desired_level = 7;
6050 else
6051 fan_control_desired_level = status;
6052 }
6053 }
6054
6055 static int fan_get_status(u8 *status)
6056 {
6057 u8 s;
6058
6059 /* TODO:
6060 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6061
6062 switch (fan_status_access_mode) {
6063 case TPACPI_FAN_RD_ACPI_GFAN:
6064 /* 570, 600e/x, 770e, 770x */
6065
6066 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6067 return -EIO;
6068
6069 if (likely(status))
6070 *status = s & 0x07;
6071
6072 break;
6073
6074 case TPACPI_FAN_RD_TPEC:
6075 /* all except 570, 600e/x, 770e, 770x */
6076 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6077 return -EIO;
6078
6079 if (likely(status)) {
6080 *status = s;
6081 fan_quirk1_handle(status);
6082 }
6083
6084 break;
6085
6086 default:
6087 return -ENXIO;
6088 }
6089
6090 return 0;
6091 }
6092
6093 static int fan_get_status_safe(u8 *status)
6094 {
6095 int rc;
6096 u8 s;
6097
6098 if (mutex_lock_killable(&fan_mutex))
6099 return -ERESTARTSYS;
6100 rc = fan_get_status(&s);
6101 if (!rc)
6102 fan_update_desired_level(s);
6103 mutex_unlock(&fan_mutex);
6104
6105 if (status)
6106 *status = s;
6107
6108 return rc;
6109 }
6110
6111 static int fan_get_speed(unsigned int *speed)
6112 {
6113 u8 hi, lo;
6114
6115 switch (fan_status_access_mode) {
6116 case TPACPI_FAN_RD_TPEC:
6117 /* all except 570, 600e/x, 770e, 770x */
6118 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6119 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6120 return -EIO;
6121
6122 if (likely(speed))
6123 *speed = (hi << 8) | lo;
6124
6125 break;
6126
6127 default:
6128 return -ENXIO;
6129 }
6130
6131 return 0;
6132 }
6133
6134 static int fan_set_level(int level)
6135 {
6136 if (!fan_control_allowed)
6137 return -EPERM;
6138
6139 switch (fan_control_access_mode) {
6140 case TPACPI_FAN_WR_ACPI_SFAN:
6141 if (level >= 0 && level <= 7) {
6142 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6143 return -EIO;
6144 } else
6145 return -EINVAL;
6146 break;
6147
6148 case TPACPI_FAN_WR_ACPI_FANS:
6149 case TPACPI_FAN_WR_TPEC:
6150 if (!(level & TP_EC_FAN_AUTO) &&
6151 !(level & TP_EC_FAN_FULLSPEED) &&
6152 ((level < 0) || (level > 7)))
6153 return -EINVAL;
6154
6155 /* safety net should the EC not support AUTO
6156 * or FULLSPEED mode bits and just ignore them */
6157 if (level & TP_EC_FAN_FULLSPEED)
6158 level |= 7; /* safety min speed 7 */
6159 else if (level & TP_EC_FAN_AUTO)
6160 level |= 4; /* safety min speed 4 */
6161
6162 if (!acpi_ec_write(fan_status_offset, level))
6163 return -EIO;
6164 else
6165 tp_features.fan_ctrl_status_undef = 0;
6166 break;
6167
6168 default:
6169 return -ENXIO;
6170 }
6171 return 0;
6172 }
6173
6174 static int fan_set_level_safe(int level)
6175 {
6176 int rc;
6177
6178 if (!fan_control_allowed)
6179 return -EPERM;
6180
6181 if (mutex_lock_killable(&fan_mutex))
6182 return -ERESTARTSYS;
6183
6184 if (level == TPACPI_FAN_LAST_LEVEL)
6185 level = fan_control_desired_level;
6186
6187 rc = fan_set_level(level);
6188 if (!rc)
6189 fan_update_desired_level(level);
6190
6191 mutex_unlock(&fan_mutex);
6192 return rc;
6193 }
6194
6195 static int fan_set_enable(void)
6196 {
6197 u8 s;
6198 int rc;
6199
6200 if (!fan_control_allowed)
6201 return -EPERM;
6202
6203 if (mutex_lock_killable(&fan_mutex))
6204 return -ERESTARTSYS;
6205
6206 switch (fan_control_access_mode) {
6207 case TPACPI_FAN_WR_ACPI_FANS:
6208 case TPACPI_FAN_WR_TPEC:
6209 rc = fan_get_status(&s);
6210 if (rc < 0)
6211 break;
6212
6213 /* Don't go out of emergency fan mode */
6214 if (s != 7) {
6215 s &= 0x07;
6216 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6217 }
6218
6219 if (!acpi_ec_write(fan_status_offset, s))
6220 rc = -EIO;
6221 else {
6222 tp_features.fan_ctrl_status_undef = 0;
6223 rc = 0;
6224 }
6225 break;
6226
6227 case TPACPI_FAN_WR_ACPI_SFAN:
6228 rc = fan_get_status(&s);
6229 if (rc < 0)
6230 break;
6231
6232 s &= 0x07;
6233
6234 /* Set fan to at least level 4 */
6235 s |= 4;
6236
6237 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6238 rc = -EIO;
6239 else
6240 rc = 0;
6241 break;
6242
6243 default:
6244 rc = -ENXIO;
6245 }
6246
6247 mutex_unlock(&fan_mutex);
6248 return rc;
6249 }
6250
6251 static int fan_set_disable(void)
6252 {
6253 int rc;
6254
6255 if (!fan_control_allowed)
6256 return -EPERM;
6257
6258 if (mutex_lock_killable(&fan_mutex))
6259 return -ERESTARTSYS;
6260
6261 rc = 0;
6262 switch (fan_control_access_mode) {
6263 case TPACPI_FAN_WR_ACPI_FANS:
6264 case TPACPI_FAN_WR_TPEC:
6265 if (!acpi_ec_write(fan_status_offset, 0x00))
6266 rc = -EIO;
6267 else {
6268 fan_control_desired_level = 0;
6269 tp_features.fan_ctrl_status_undef = 0;
6270 }
6271 break;
6272
6273 case TPACPI_FAN_WR_ACPI_SFAN:
6274 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6275 rc = -EIO;
6276 else
6277 fan_control_desired_level = 0;
6278 break;
6279
6280 default:
6281 rc = -ENXIO;
6282 }
6283
6284
6285 mutex_unlock(&fan_mutex);
6286 return rc;
6287 }
6288
6289 static int fan_set_speed(int speed)
6290 {
6291 int rc;
6292
6293 if (!fan_control_allowed)
6294 return -EPERM;
6295
6296 if (mutex_lock_killable(&fan_mutex))
6297 return -ERESTARTSYS;
6298
6299 rc = 0;
6300 switch (fan_control_access_mode) {
6301 case TPACPI_FAN_WR_ACPI_FANS:
6302 if (speed >= 0 && speed <= 65535) {
6303 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6304 speed, speed, speed))
6305 rc = -EIO;
6306 } else
6307 rc = -EINVAL;
6308 break;
6309
6310 default:
6311 rc = -ENXIO;
6312 }
6313
6314 mutex_unlock(&fan_mutex);
6315 return rc;
6316 }
6317
6318 static void fan_watchdog_reset(void)
6319 {
6320 static int fan_watchdog_active;
6321
6322 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6323 return;
6324
6325 if (fan_watchdog_active)
6326 cancel_delayed_work(&fan_watchdog_task);
6327
6328 if (fan_watchdog_maxinterval > 0 &&
6329 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6330 fan_watchdog_active = 1;
6331 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6332 msecs_to_jiffies(fan_watchdog_maxinterval
6333 * 1000))) {
6334 printk(TPACPI_ERR
6335 "failed to queue the fan watchdog, "
6336 "watchdog will not trigger\n");
6337 }
6338 } else
6339 fan_watchdog_active = 0;
6340 }
6341
6342 static void fan_watchdog_fire(struct work_struct *ignored)
6343 {
6344 int rc;
6345
6346 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6347 return;
6348
6349 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6350 rc = fan_set_enable();
6351 if (rc < 0) {
6352 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6353 "will try again later...\n", -rc);
6354 /* reschedule for later */
6355 fan_watchdog_reset();
6356 }
6357 }
6358
6359 /*
6360 * SYSFS fan layout: hwmon compatible (device)
6361 *
6362 * pwm*_enable:
6363 * 0: "disengaged" mode
6364 * 1: manual mode
6365 * 2: native EC "auto" mode (recommended, hardware default)
6366 *
6367 * pwm*: set speed in manual mode, ignored otherwise.
6368 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6369 * interpolation.
6370 *
6371 * fan*_input: tachometer reading, RPM
6372 *
6373 *
6374 * SYSFS fan layout: extensions
6375 *
6376 * fan_watchdog (driver):
6377 * fan watchdog interval in seconds, 0 disables (default), max 120
6378 */
6379
6380 /* sysfs fan pwm1_enable ----------------------------------------------- */
6381 static ssize_t fan_pwm1_enable_show(struct device *dev,
6382 struct device_attribute *attr,
6383 char *buf)
6384 {
6385 int res, mode;
6386 u8 status;
6387
6388 res = fan_get_status_safe(&status);
6389 if (res)
6390 return res;
6391
6392 if (status & TP_EC_FAN_FULLSPEED) {
6393 mode = 0;
6394 } else if (status & TP_EC_FAN_AUTO) {
6395 mode = 2;
6396 } else
6397 mode = 1;
6398
6399 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6400 }
6401
6402 static ssize_t fan_pwm1_enable_store(struct device *dev,
6403 struct device_attribute *attr,
6404 const char *buf, size_t count)
6405 {
6406 unsigned long t;
6407 int res, level;
6408
6409 if (parse_strtoul(buf, 2, &t))
6410 return -EINVAL;
6411
6412 switch (t) {
6413 case 0:
6414 level = TP_EC_FAN_FULLSPEED;
6415 break;
6416 case 1:
6417 level = TPACPI_FAN_LAST_LEVEL;
6418 break;
6419 case 2:
6420 level = TP_EC_FAN_AUTO;
6421 break;
6422 case 3:
6423 /* reserved for software-controlled auto mode */
6424 return -ENOSYS;
6425 default:
6426 return -EINVAL;
6427 }
6428
6429 res = fan_set_level_safe(level);
6430 if (res == -ENXIO)
6431 return -EINVAL;
6432 else if (res < 0)
6433 return res;
6434
6435 fan_watchdog_reset();
6436
6437 return count;
6438 }
6439
6440 static struct device_attribute dev_attr_fan_pwm1_enable =
6441 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6442 fan_pwm1_enable_show, fan_pwm1_enable_store);
6443
6444 /* sysfs fan pwm1 ------------------------------------------------------ */
6445 static ssize_t fan_pwm1_show(struct device *dev,
6446 struct device_attribute *attr,
6447 char *buf)
6448 {
6449 int res;
6450 u8 status;
6451
6452 res = fan_get_status_safe(&status);
6453 if (res)
6454 return res;
6455
6456 if ((status &
6457 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6458 status = fan_control_desired_level;
6459
6460 if (status > 7)
6461 status = 7;
6462
6463 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6464 }
6465
6466 static ssize_t fan_pwm1_store(struct device *dev,
6467 struct device_attribute *attr,
6468 const char *buf, size_t count)
6469 {
6470 unsigned long s;
6471 int rc;
6472 u8 status, newlevel;
6473
6474 if (parse_strtoul(buf, 255, &s))
6475 return -EINVAL;
6476
6477 /* scale down from 0-255 to 0-7 */
6478 newlevel = (s >> 5) & 0x07;
6479
6480 if (mutex_lock_killable(&fan_mutex))
6481 return -ERESTARTSYS;
6482
6483 rc = fan_get_status(&status);
6484 if (!rc && (status &
6485 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6486 rc = fan_set_level(newlevel);
6487 if (rc == -ENXIO)
6488 rc = -EINVAL;
6489 else if (!rc) {
6490 fan_update_desired_level(newlevel);
6491 fan_watchdog_reset();
6492 }
6493 }
6494
6495 mutex_unlock(&fan_mutex);
6496 return (rc)? rc : count;
6497 }
6498
6499 static struct device_attribute dev_attr_fan_pwm1 =
6500 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6501 fan_pwm1_show, fan_pwm1_store);
6502
6503 /* sysfs fan fan1_input ------------------------------------------------ */
6504 static ssize_t fan_fan1_input_show(struct device *dev,
6505 struct device_attribute *attr,
6506 char *buf)
6507 {
6508 int res;
6509 unsigned int speed;
6510
6511 res = fan_get_speed(&speed);
6512 if (res < 0)
6513 return res;
6514
6515 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6516 }
6517
6518 static struct device_attribute dev_attr_fan_fan1_input =
6519 __ATTR(fan1_input, S_IRUGO,
6520 fan_fan1_input_show, NULL);
6521
6522 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6523 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6524 char *buf)
6525 {
6526 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6527 }
6528
6529 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6530 const char *buf, size_t count)
6531 {
6532 unsigned long t;
6533
6534 if (parse_strtoul(buf, 120, &t))
6535 return -EINVAL;
6536
6537 if (!fan_control_allowed)
6538 return -EPERM;
6539
6540 fan_watchdog_maxinterval = t;
6541 fan_watchdog_reset();
6542
6543 return count;
6544 }
6545
6546 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6547 fan_fan_watchdog_show, fan_fan_watchdog_store);
6548
6549 /* --------------------------------------------------------------------- */
6550 static struct attribute *fan_attributes[] = {
6551 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6552 &dev_attr_fan_fan1_input.attr,
6553 NULL
6554 };
6555
6556 static const struct attribute_group fan_attr_group = {
6557 .attrs = fan_attributes,
6558 };
6559
6560 static int __init fan_init(struct ibm_init_struct *iibm)
6561 {
6562 int rc;
6563
6564 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
6565
6566 mutex_init(&fan_mutex);
6567 fan_status_access_mode = TPACPI_FAN_NONE;
6568 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6569 fan_control_commands = 0;
6570 fan_watchdog_maxinterval = 0;
6571 tp_features.fan_ctrl_status_undef = 0;
6572 fan_control_desired_level = 7;
6573
6574 TPACPI_ACPIHANDLE_INIT(fans);
6575 TPACPI_ACPIHANDLE_INIT(gfan);
6576 TPACPI_ACPIHANDLE_INIT(sfan);
6577
6578 if (gfan_handle) {
6579 /* 570, 600e/x, 770e, 770x */
6580 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6581 } else {
6582 /* all other ThinkPads: note that even old-style
6583 * ThinkPad ECs supports the fan control register */
6584 if (likely(acpi_ec_read(fan_status_offset,
6585 &fan_control_initial_status))) {
6586 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6587 fan_quirk1_detect();
6588 } else {
6589 printk(TPACPI_ERR
6590 "ThinkPad ACPI EC access misbehaving, "
6591 "fan status and control unavailable\n");
6592 return 1;
6593 }
6594 }
6595
6596 if (sfan_handle) {
6597 /* 570, 770x-JL */
6598 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6599 fan_control_commands |=
6600 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6601 } else {
6602 if (!gfan_handle) {
6603 /* gfan without sfan means no fan control */
6604 /* all other models implement TP EC 0x2f control */
6605
6606 if (fans_handle) {
6607 /* X31, X40, X41 */
6608 fan_control_access_mode =
6609 TPACPI_FAN_WR_ACPI_FANS;
6610 fan_control_commands |=
6611 TPACPI_FAN_CMD_SPEED |
6612 TPACPI_FAN_CMD_LEVEL |
6613 TPACPI_FAN_CMD_ENABLE;
6614 } else {
6615 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6616 fan_control_commands |=
6617 TPACPI_FAN_CMD_LEVEL |
6618 TPACPI_FAN_CMD_ENABLE;
6619 }
6620 }
6621 }
6622
6623 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
6624 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6625 fan_control_access_mode != TPACPI_FAN_WR_NONE),
6626 fan_status_access_mode, fan_control_access_mode);
6627
6628 /* fan control master switch */
6629 if (!fan_control_allowed) {
6630 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6631 fan_control_commands = 0;
6632 dbg_printk(TPACPI_DBG_INIT,
6633 "fan control features disabled by parameter\n");
6634 }
6635
6636 /* update fan_control_desired_level */
6637 if (fan_status_access_mode != TPACPI_FAN_NONE)
6638 fan_get_status_safe(NULL);
6639
6640 if (fan_status_access_mode != TPACPI_FAN_NONE ||
6641 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6642 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6643 &fan_attr_group);
6644 if (rc < 0)
6645 return rc;
6646
6647 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6648 &driver_attr_fan_watchdog);
6649 if (rc < 0) {
6650 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6651 &fan_attr_group);
6652 return rc;
6653 }
6654 return 0;
6655 } else
6656 return 1;
6657 }
6658
6659 static void fan_exit(void)
6660 {
6661 vdbg_printk(TPACPI_DBG_EXIT,
6662 "cancelling any pending fan watchdog tasks\n");
6663
6664 /* FIXME: can we really do this unconditionally? */
6665 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6666 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6667 &driver_attr_fan_watchdog);
6668
6669 cancel_delayed_work(&fan_watchdog_task);
6670 flush_workqueue(tpacpi_wq);
6671 }
6672
6673 static void fan_suspend(pm_message_t state)
6674 {
6675 int rc;
6676
6677 if (!fan_control_allowed)
6678 return;
6679
6680 /* Store fan status in cache */
6681 fan_control_resume_level = 0;
6682 rc = fan_get_status_safe(&fan_control_resume_level);
6683 if (rc < 0)
6684 printk(TPACPI_NOTICE
6685 "failed to read fan level for later "
6686 "restore during resume: %d\n", rc);
6687
6688 /* if it is undefined, don't attempt to restore it.
6689 * KEEP THIS LAST */
6690 if (tp_features.fan_ctrl_status_undef)
6691 fan_control_resume_level = 0;
6692 }
6693
6694 static void fan_resume(void)
6695 {
6696 u8 current_level = 7;
6697 bool do_set = false;
6698 int rc;
6699
6700 /* DSDT *always* updates status on resume */
6701 tp_features.fan_ctrl_status_undef = 0;
6702
6703 if (!fan_control_allowed ||
6704 !fan_control_resume_level ||
6705 (fan_get_status_safe(&current_level) < 0))
6706 return;
6707
6708 switch (fan_control_access_mode) {
6709 case TPACPI_FAN_WR_ACPI_SFAN:
6710 /* never decrease fan level */
6711 do_set = (fan_control_resume_level > current_level);
6712 break;
6713 case TPACPI_FAN_WR_ACPI_FANS:
6714 case TPACPI_FAN_WR_TPEC:
6715 /* never decrease fan level, scale is:
6716 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6717 *
6718 * We expect the firmware to set either 7 or AUTO, but we
6719 * handle FULLSPEED out of paranoia.
6720 *
6721 * So, we can safely only restore FULLSPEED or 7, anything
6722 * else could slow the fan. Restoring AUTO is useless, at
6723 * best that's exactly what the DSDT already set (it is the
6724 * slower it uses).
6725 *
6726 * Always keep in mind that the DSDT *will* have set the
6727 * fans to what the vendor supposes is the best level. We
6728 * muck with it only to speed the fan up.
6729 */
6730 if (fan_control_resume_level != 7 &&
6731 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6732 return;
6733 else
6734 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6735 (current_level != fan_control_resume_level);
6736 break;
6737 default:
6738 return;
6739 }
6740 if (do_set) {
6741 printk(TPACPI_NOTICE
6742 "restoring fan level to 0x%02x\n",
6743 fan_control_resume_level);
6744 rc = fan_set_level_safe(fan_control_resume_level);
6745 if (rc < 0)
6746 printk(TPACPI_NOTICE
6747 "failed to restore fan level: %d\n", rc);
6748 }
6749 }
6750
6751 static int fan_read(char *p)
6752 {
6753 int len = 0;
6754 int rc;
6755 u8 status;
6756 unsigned int speed = 0;
6757
6758 switch (fan_status_access_mode) {
6759 case TPACPI_FAN_RD_ACPI_GFAN:
6760 /* 570, 600e/x, 770e, 770x */
6761 rc = fan_get_status_safe(&status);
6762 if (rc < 0)
6763 return rc;
6764
6765 len += sprintf(p + len, "status:\t\t%s\n"
6766 "level:\t\t%d\n",
6767 (status != 0) ? "enabled" : "disabled", status);
6768 break;
6769
6770 case TPACPI_FAN_RD_TPEC:
6771 /* all except 570, 600e/x, 770e, 770x */
6772 rc = fan_get_status_safe(&status);
6773 if (rc < 0)
6774 return rc;
6775
6776 len += sprintf(p + len, "status:\t\t%s\n",
6777 (status != 0) ? "enabled" : "disabled");
6778
6779 rc = fan_get_speed(&speed);
6780 if (rc < 0)
6781 return rc;
6782
6783 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6784
6785 if (status & TP_EC_FAN_FULLSPEED)
6786 /* Disengaged mode takes precedence */
6787 len += sprintf(p + len, "level:\t\tdisengaged\n");
6788 else if (status & TP_EC_FAN_AUTO)
6789 len += sprintf(p + len, "level:\t\tauto\n");
6790 else
6791 len += sprintf(p + len, "level:\t\t%d\n", status);
6792 break;
6793
6794 case TPACPI_FAN_NONE:
6795 default:
6796 len += sprintf(p + len, "status:\t\tnot supported\n");
6797 }
6798
6799 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6800 len += sprintf(p + len, "commands:\tlevel <level>");
6801
6802 switch (fan_control_access_mode) {
6803 case TPACPI_FAN_WR_ACPI_SFAN:
6804 len += sprintf(p + len, " (<level> is 0-7)\n");
6805 break;
6806
6807 default:
6808 len += sprintf(p + len, " (<level> is 0-7, "
6809 "auto, disengaged, full-speed)\n");
6810 break;
6811 }
6812 }
6813
6814 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6815 len += sprintf(p + len, "commands:\tenable, disable\n"
6816 "commands:\twatchdog <timeout> (<timeout> "
6817 "is 0 (off), 1-120 (seconds))\n");
6818
6819 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6820 len += sprintf(p + len, "commands:\tspeed <speed>"
6821 " (<speed> is 0-65535)\n");
6822
6823 return len;
6824 }
6825
6826 static int fan_write_cmd_level(const char *cmd, int *rc)
6827 {
6828 int level;
6829
6830 if (strlencmp(cmd, "level auto") == 0)
6831 level = TP_EC_FAN_AUTO;
6832 else if ((strlencmp(cmd, "level disengaged") == 0) |
6833 (strlencmp(cmd, "level full-speed") == 0))
6834 level = TP_EC_FAN_FULLSPEED;
6835 else if (sscanf(cmd, "level %d", &level) != 1)
6836 return 0;
6837
6838 *rc = fan_set_level_safe(level);
6839 if (*rc == -ENXIO)
6840 printk(TPACPI_ERR "level command accepted for unsupported "
6841 "access mode %d", fan_control_access_mode);
6842
6843 return 1;
6844 }
6845
6846 static int fan_write_cmd_enable(const char *cmd, int *rc)
6847 {
6848 if (strlencmp(cmd, "enable") != 0)
6849 return 0;
6850
6851 *rc = fan_set_enable();
6852 if (*rc == -ENXIO)
6853 printk(TPACPI_ERR "enable command accepted for unsupported "
6854 "access mode %d", fan_control_access_mode);
6855
6856 return 1;
6857 }
6858
6859 static int fan_write_cmd_disable(const char *cmd, int *rc)
6860 {
6861 if (strlencmp(cmd, "disable") != 0)
6862 return 0;
6863
6864 *rc = fan_set_disable();
6865 if (*rc == -ENXIO)
6866 printk(TPACPI_ERR "disable command accepted for unsupported "
6867 "access mode %d", fan_control_access_mode);
6868
6869 return 1;
6870 }
6871
6872 static int fan_write_cmd_speed(const char *cmd, int *rc)
6873 {
6874 int speed;
6875
6876 /* TODO:
6877 * Support speed <low> <medium> <high> ? */
6878
6879 if (sscanf(cmd, "speed %d", &speed) != 1)
6880 return 0;
6881
6882 *rc = fan_set_speed(speed);
6883 if (*rc == -ENXIO)
6884 printk(TPACPI_ERR "speed command accepted for unsupported "
6885 "access mode %d", fan_control_access_mode);
6886
6887 return 1;
6888 }
6889
6890 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6891 {
6892 int interval;
6893
6894 if (sscanf(cmd, "watchdog %d", &interval) != 1)
6895 return 0;
6896
6897 if (interval < 0 || interval > 120)
6898 *rc = -EINVAL;
6899 else
6900 fan_watchdog_maxinterval = interval;
6901
6902 return 1;
6903 }
6904
6905 static int fan_write(char *buf)
6906 {
6907 char *cmd;
6908 int rc = 0;
6909
6910 while (!rc && (cmd = next_cmd(&buf))) {
6911 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6912 fan_write_cmd_level(cmd, &rc)) &&
6913 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6914 (fan_write_cmd_enable(cmd, &rc) ||
6915 fan_write_cmd_disable(cmd, &rc) ||
6916 fan_write_cmd_watchdog(cmd, &rc))) &&
6917 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6918 fan_write_cmd_speed(cmd, &rc))
6919 )
6920 rc = -EINVAL;
6921 else if (!rc)
6922 fan_watchdog_reset();
6923 }
6924
6925 return rc;
6926 }
6927
6928 static struct ibm_struct fan_driver_data = {
6929 .name = "fan",
6930 .read = fan_read,
6931 .write = fan_write,
6932 .exit = fan_exit,
6933 .suspend = fan_suspend,
6934 .resume = fan_resume,
6935 };
6936
6937 /****************************************************************************
6938 ****************************************************************************
6939 *
6940 * Infrastructure
6941 *
6942 ****************************************************************************
6943 ****************************************************************************/
6944
6945 /* sysfs name ---------------------------------------------------------- */
6946 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6947 struct device_attribute *attr,
6948 char *buf)
6949 {
6950 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6951 }
6952
6953 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6954 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6955
6956 /* --------------------------------------------------------------------- */
6957
6958 /* /proc support */
6959 static struct proc_dir_entry *proc_dir;
6960
6961 /*
6962 * Module and infrastructure proble, init and exit handling
6963 */
6964
6965 static int force_load;
6966
6967 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6968 static const char * __init str_supported(int is_supported)
6969 {
6970 static char text_unsupported[] __initdata = "not supported";
6971
6972 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6973 }
6974 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6975
6976 static void ibm_exit(struct ibm_struct *ibm)
6977 {
6978 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6979
6980 list_del_init(&ibm->all_drivers);
6981
6982 if (ibm->flags.acpi_notify_installed) {
6983 dbg_printk(TPACPI_DBG_EXIT,
6984 "%s: acpi_remove_notify_handler\n", ibm->name);
6985 BUG_ON(!ibm->acpi);
6986 acpi_remove_notify_handler(*ibm->acpi->handle,
6987 ibm->acpi->type,
6988 dispatch_acpi_notify);
6989 ibm->flags.acpi_notify_installed = 0;
6990 ibm->flags.acpi_notify_installed = 0;
6991 }
6992
6993 if (ibm->flags.proc_created) {
6994 dbg_printk(TPACPI_DBG_EXIT,
6995 "%s: remove_proc_entry\n", ibm->name);
6996 remove_proc_entry(ibm->name, proc_dir);
6997 ibm->flags.proc_created = 0;
6998 }
6999
7000 if (ibm->flags.acpi_driver_registered) {
7001 dbg_printk(TPACPI_DBG_EXIT,
7002 "%s: acpi_bus_unregister_driver\n", ibm->name);
7003 BUG_ON(!ibm->acpi);
7004 acpi_bus_unregister_driver(ibm->acpi->driver);
7005 kfree(ibm->acpi->driver);
7006 ibm->acpi->driver = NULL;
7007 ibm->flags.acpi_driver_registered = 0;
7008 }
7009
7010 if (ibm->flags.init_called && ibm->exit) {
7011 ibm->exit();
7012 ibm->flags.init_called = 0;
7013 }
7014
7015 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7016 }
7017
7018 static int __init ibm_init(struct ibm_init_struct *iibm)
7019 {
7020 int ret;
7021 struct ibm_struct *ibm = iibm->data;
7022 struct proc_dir_entry *entry;
7023
7024 BUG_ON(ibm == NULL);
7025
7026 INIT_LIST_HEAD(&ibm->all_drivers);
7027
7028 if (ibm->flags.experimental && !experimental)
7029 return 0;
7030
7031 dbg_printk(TPACPI_DBG_INIT,
7032 "probing for %s\n", ibm->name);
7033
7034 if (iibm->init) {
7035 ret = iibm->init(iibm);
7036 if (ret > 0)
7037 return 0; /* probe failed */
7038 if (ret)
7039 return ret;
7040
7041 ibm->flags.init_called = 1;
7042 }
7043
7044 if (ibm->acpi) {
7045 if (ibm->acpi->hid) {
7046 ret = register_tpacpi_subdriver(ibm);
7047 if (ret)
7048 goto err_out;
7049 }
7050
7051 if (ibm->acpi->notify) {
7052 ret = setup_acpi_notify(ibm);
7053 if (ret == -ENODEV) {
7054 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7055 ibm->name);
7056 ret = 0;
7057 goto err_out;
7058 }
7059 if (ret < 0)
7060 goto err_out;
7061 }
7062 }
7063
7064 dbg_printk(TPACPI_DBG_INIT,
7065 "%s installed\n", ibm->name);
7066
7067 if (ibm->read) {
7068 entry = create_proc_entry(ibm->name,
7069 S_IFREG | S_IRUGO | S_IWUSR,
7070 proc_dir);
7071 if (!entry) {
7072 printk(TPACPI_ERR "unable to create proc entry %s\n",
7073 ibm->name);
7074 ret = -ENODEV;
7075 goto err_out;
7076 }
7077 entry->owner = THIS_MODULE;
7078 entry->data = ibm;
7079 entry->read_proc = &dispatch_procfs_read;
7080 if (ibm->write)
7081 entry->write_proc = &dispatch_procfs_write;
7082 ibm->flags.proc_created = 1;
7083 }
7084
7085 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7086
7087 return 0;
7088
7089 err_out:
7090 dbg_printk(TPACPI_DBG_INIT,
7091 "%s: at error exit path with result %d\n",
7092 ibm->name, ret);
7093
7094 ibm_exit(ibm);
7095 return (ret < 0)? ret : 0;
7096 }
7097
7098 /* Probing */
7099
7100 /* returns 0 - probe ok, or < 0 - probe error.
7101 * Probe ok doesn't mean thinkpad found.
7102 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7103 static int __must_check __init get_thinkpad_model_data(
7104 struct thinkpad_id_data *tp)
7105 {
7106 const struct dmi_device *dev = NULL;
7107 char ec_fw_string[18];
7108 char const *s;
7109
7110 if (!tp)
7111 return -EINVAL;
7112
7113 memset(tp, 0, sizeof(*tp));
7114
7115 if (dmi_name_in_vendors("IBM"))
7116 tp->vendor = PCI_VENDOR_ID_IBM;
7117 else if (dmi_name_in_vendors("LENOVO"))
7118 tp->vendor = PCI_VENDOR_ID_LENOVO;
7119 else
7120 return 0;
7121
7122 s = dmi_get_system_info(DMI_BIOS_VERSION);
7123 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7124 if (s && !tp->bios_version_str)
7125 return -ENOMEM;
7126 if (!tp->bios_version_str)
7127 return 0;
7128 tp->bios_model = tp->bios_version_str[0]
7129 | (tp->bios_version_str[1] << 8);
7130
7131 /*
7132 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7133 * X32 or newer, all Z series; Some models must have an
7134 * up-to-date BIOS or they will not be detected.
7135 *
7136 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7137 */
7138 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7139 if (sscanf(dev->name,
7140 "IBM ThinkPad Embedded Controller -[%17c",
7141 ec_fw_string) == 1) {
7142 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7143 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7144
7145 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7146 if (!tp->ec_version_str)
7147 return -ENOMEM;
7148 tp->ec_model = ec_fw_string[0]
7149 | (ec_fw_string[1] << 8);
7150 break;
7151 }
7152 }
7153
7154 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7155 if (s && !strnicmp(s, "ThinkPad", 8)) {
7156 tp->model_str = kstrdup(s, GFP_KERNEL);
7157 if (!tp->model_str)
7158 return -ENOMEM;
7159 }
7160
7161 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7162 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7163 if (s && !tp->nummodel_str)
7164 return -ENOMEM;
7165
7166 return 0;
7167 }
7168
7169 static int __init probe_for_thinkpad(void)
7170 {
7171 int is_thinkpad;
7172
7173 if (acpi_disabled)
7174 return -ENODEV;
7175
7176 /*
7177 * Non-ancient models have better DMI tagging, but very old models
7178 * don't.
7179 */
7180 is_thinkpad = (thinkpad_id.model_str != NULL);
7181
7182 /* ec is required because many other handles are relative to it */
7183 TPACPI_ACPIHANDLE_INIT(ec);
7184 if (!ec_handle) {
7185 if (is_thinkpad)
7186 printk(TPACPI_ERR
7187 "Not yet supported ThinkPad detected!\n");
7188 return -ENODEV;
7189 }
7190
7191 /*
7192 * Risks a regression on very old machines, but reduces potential
7193 * false positives a damn great deal
7194 */
7195 if (!is_thinkpad)
7196 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7197
7198 if (!is_thinkpad && !force_load)
7199 return -ENODEV;
7200
7201 return 0;
7202 }
7203
7204
7205 /* Module init, exit, parameters */
7206
7207 static struct ibm_init_struct ibms_init[] __initdata = {
7208 {
7209 .init = thinkpad_acpi_driver_init,
7210 .data = &thinkpad_acpi_driver_data,
7211 },
7212 {
7213 .init = hotkey_init,
7214 .data = &hotkey_driver_data,
7215 },
7216 {
7217 .init = bluetooth_init,
7218 .data = &bluetooth_driver_data,
7219 },
7220 {
7221 .init = wan_init,
7222 .data = &wan_driver_data,
7223 },
7224 {
7225 .init = uwb_init,
7226 .data = &uwb_driver_data,
7227 },
7228 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7229 {
7230 .init = video_init,
7231 .data = &video_driver_data,
7232 },
7233 #endif
7234 {
7235 .init = light_init,
7236 .data = &light_driver_data,
7237 },
7238 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7239 {
7240 .init = dock_init,
7241 .data = &dock_driver_data[0],
7242 },
7243 {
7244 .init = dock_init2,
7245 .data = &dock_driver_data[1],
7246 },
7247 #endif
7248 #ifdef CONFIG_THINKPAD_ACPI_BAY
7249 {
7250 .init = bay_init,
7251 .data = &bay_driver_data,
7252 },
7253 #endif
7254 {
7255 .init = cmos_init,
7256 .data = &cmos_driver_data,
7257 },
7258 {
7259 .init = led_init,
7260 .data = &led_driver_data,
7261 },
7262 {
7263 .init = beep_init,
7264 .data = &beep_driver_data,
7265 },
7266 {
7267 .init = thermal_init,
7268 .data = &thermal_driver_data,
7269 },
7270 {
7271 .data = &ecdump_driver_data,
7272 },
7273 {
7274 .init = brightness_init,
7275 .data = &brightness_driver_data,
7276 },
7277 {
7278 .data = &volume_driver_data,
7279 },
7280 {
7281 .init = fan_init,
7282 .data = &fan_driver_data,
7283 },
7284 };
7285
7286 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7287 {
7288 unsigned int i;
7289 struct ibm_struct *ibm;
7290
7291 if (!kp || !kp->name || !val)
7292 return -EINVAL;
7293
7294 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7295 ibm = ibms_init[i].data;
7296 WARN_ON(ibm == NULL);
7297
7298 if (!ibm || !ibm->name)
7299 continue;
7300
7301 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7302 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7303 return -ENOSPC;
7304 strcpy(ibms_init[i].param, val);
7305 strcat(ibms_init[i].param, ",");
7306 return 0;
7307 }
7308 }
7309
7310 return -EINVAL;
7311 }
7312
7313 module_param(experimental, int, 0);
7314 MODULE_PARM_DESC(experimental,
7315 "Enables experimental features when non-zero");
7316
7317 module_param_named(debug, dbg_level, uint, 0);
7318 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7319
7320 module_param(force_load, bool, 0);
7321 MODULE_PARM_DESC(force_load,
7322 "Attempts to load the driver even on a "
7323 "mis-identified ThinkPad when true");
7324
7325 module_param_named(fan_control, fan_control_allowed, bool, 0);
7326 MODULE_PARM_DESC(fan_control,
7327 "Enables setting fan parameters features when true");
7328
7329 module_param_named(brightness_mode, brightness_mode, int, 0);
7330 MODULE_PARM_DESC(brightness_mode,
7331 "Selects brightness control strategy: "
7332 "0=auto, 1=EC, 2=CMOS, 3=both");
7333
7334 module_param(brightness_enable, uint, 0);
7335 MODULE_PARM_DESC(brightness_enable,
7336 "Enables backlight control when 1, disables when 0");
7337
7338 module_param(hotkey_report_mode, uint, 0);
7339 MODULE_PARM_DESC(hotkey_report_mode,
7340 "used for backwards compatibility with userspace, "
7341 "see documentation");
7342
7343 #define TPACPI_PARAM(feature) \
7344 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7345 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7346 "at module load, see documentation")
7347
7348 TPACPI_PARAM(hotkey);
7349 TPACPI_PARAM(bluetooth);
7350 TPACPI_PARAM(video);
7351 TPACPI_PARAM(light);
7352 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7353 TPACPI_PARAM(dock);
7354 #endif
7355 #ifdef CONFIG_THINKPAD_ACPI_BAY
7356 TPACPI_PARAM(bay);
7357 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7358 TPACPI_PARAM(cmos);
7359 TPACPI_PARAM(led);
7360 TPACPI_PARAM(beep);
7361 TPACPI_PARAM(ecdump);
7362 TPACPI_PARAM(brightness);
7363 TPACPI_PARAM(volume);
7364 TPACPI_PARAM(fan);
7365
7366 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7367 module_param(dbg_wlswemul, uint, 0);
7368 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7369 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7370 MODULE_PARM_DESC(wlsw_state,
7371 "Initial state of the emulated WLSW switch");
7372
7373 module_param(dbg_bluetoothemul, uint, 0);
7374 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7375 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7376 MODULE_PARM_DESC(bluetooth_state,
7377 "Initial state of the emulated bluetooth switch");
7378
7379 module_param(dbg_wwanemul, uint, 0);
7380 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7381 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7382 MODULE_PARM_DESC(wwan_state,
7383 "Initial state of the emulated WWAN switch");
7384
7385 module_param(dbg_uwbemul, uint, 0);
7386 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7387 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7388 MODULE_PARM_DESC(uwb_state,
7389 "Initial state of the emulated UWB switch");
7390 #endif
7391
7392 static void thinkpad_acpi_module_exit(void)
7393 {
7394 struct ibm_struct *ibm, *itmp;
7395
7396 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7397
7398 list_for_each_entry_safe_reverse(ibm, itmp,
7399 &tpacpi_all_drivers,
7400 all_drivers) {
7401 ibm_exit(ibm);
7402 }
7403
7404 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7405
7406 if (tpacpi_inputdev) {
7407 if (tp_features.input_device_registered)
7408 input_unregister_device(tpacpi_inputdev);
7409 else
7410 input_free_device(tpacpi_inputdev);
7411 }
7412
7413 if (tpacpi_hwmon)
7414 hwmon_device_unregister(tpacpi_hwmon);
7415
7416 if (tp_features.sensors_pdev_attrs_registered)
7417 device_remove_file(&tpacpi_sensors_pdev->dev,
7418 &dev_attr_thinkpad_acpi_pdev_name);
7419 if (tpacpi_sensors_pdev)
7420 platform_device_unregister(tpacpi_sensors_pdev);
7421 if (tpacpi_pdev)
7422 platform_device_unregister(tpacpi_pdev);
7423
7424 if (tp_features.sensors_pdrv_attrs_registered)
7425 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7426 if (tp_features.platform_drv_attrs_registered)
7427 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7428
7429 if (tp_features.sensors_pdrv_registered)
7430 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7431
7432 if (tp_features.platform_drv_registered)
7433 platform_driver_unregister(&tpacpi_pdriver);
7434
7435 if (proc_dir)
7436 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7437
7438 if (tpacpi_wq)
7439 destroy_workqueue(tpacpi_wq);
7440
7441 kfree(thinkpad_id.bios_version_str);
7442 kfree(thinkpad_id.ec_version_str);
7443 kfree(thinkpad_id.model_str);
7444 }
7445
7446
7447 static int __init thinkpad_acpi_module_init(void)
7448 {
7449 int ret, i;
7450
7451 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7452
7453 /* Parameter checking */
7454 if (hotkey_report_mode > 2)
7455 return -EINVAL;
7456
7457 /* Driver-level probe */
7458
7459 ret = get_thinkpad_model_data(&thinkpad_id);
7460 if (ret) {
7461 printk(TPACPI_ERR
7462 "unable to get DMI data: %d\n", ret);
7463 thinkpad_acpi_module_exit();
7464 return ret;
7465 }
7466 ret = probe_for_thinkpad();
7467 if (ret) {
7468 thinkpad_acpi_module_exit();
7469 return ret;
7470 }
7471
7472 /* Driver initialization */
7473
7474 TPACPI_ACPIHANDLE_INIT(ecrd);
7475 TPACPI_ACPIHANDLE_INIT(ecwr);
7476
7477 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7478 if (!tpacpi_wq) {
7479 thinkpad_acpi_module_exit();
7480 return -ENOMEM;
7481 }
7482
7483 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7484 if (!proc_dir) {
7485 printk(TPACPI_ERR
7486 "unable to create proc dir " TPACPI_PROC_DIR);
7487 thinkpad_acpi_module_exit();
7488 return -ENODEV;
7489 }
7490 proc_dir->owner = THIS_MODULE;
7491
7492 ret = platform_driver_register(&tpacpi_pdriver);
7493 if (ret) {
7494 printk(TPACPI_ERR
7495 "unable to register main platform driver\n");
7496 thinkpad_acpi_module_exit();
7497 return ret;
7498 }
7499 tp_features.platform_drv_registered = 1;
7500
7501 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7502 if (ret) {
7503 printk(TPACPI_ERR
7504 "unable to register hwmon platform driver\n");
7505 thinkpad_acpi_module_exit();
7506 return ret;
7507 }
7508 tp_features.sensors_pdrv_registered = 1;
7509
7510 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7511 if (!ret) {
7512 tp_features.platform_drv_attrs_registered = 1;
7513 ret = tpacpi_create_driver_attributes(
7514 &tpacpi_hwmon_pdriver.driver);
7515 }
7516 if (ret) {
7517 printk(TPACPI_ERR
7518 "unable to create sysfs driver attributes\n");
7519 thinkpad_acpi_module_exit();
7520 return ret;
7521 }
7522 tp_features.sensors_pdrv_attrs_registered = 1;
7523
7524
7525 /* Device initialization */
7526 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7527 NULL, 0);
7528 if (IS_ERR(tpacpi_pdev)) {
7529 ret = PTR_ERR(tpacpi_pdev);
7530 tpacpi_pdev = NULL;
7531 printk(TPACPI_ERR "unable to register platform device\n");
7532 thinkpad_acpi_module_exit();
7533 return ret;
7534 }
7535 tpacpi_sensors_pdev = platform_device_register_simple(
7536 TPACPI_HWMON_DRVR_NAME,
7537 -1, NULL, 0);
7538 if (IS_ERR(tpacpi_sensors_pdev)) {
7539 ret = PTR_ERR(tpacpi_sensors_pdev);
7540 tpacpi_sensors_pdev = NULL;
7541 printk(TPACPI_ERR
7542 "unable to register hwmon platform device\n");
7543 thinkpad_acpi_module_exit();
7544 return ret;
7545 }
7546 ret = device_create_file(&tpacpi_sensors_pdev->dev,
7547 &dev_attr_thinkpad_acpi_pdev_name);
7548 if (ret) {
7549 printk(TPACPI_ERR
7550 "unable to create sysfs hwmon device attributes\n");
7551 thinkpad_acpi_module_exit();
7552 return ret;
7553 }
7554 tp_features.sensors_pdev_attrs_registered = 1;
7555 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7556 if (IS_ERR(tpacpi_hwmon)) {
7557 ret = PTR_ERR(tpacpi_hwmon);
7558 tpacpi_hwmon = NULL;
7559 printk(TPACPI_ERR "unable to register hwmon device\n");
7560 thinkpad_acpi_module_exit();
7561 return ret;
7562 }
7563 mutex_init(&tpacpi_inputdev_send_mutex);
7564 tpacpi_inputdev = input_allocate_device();
7565 if (!tpacpi_inputdev) {
7566 printk(TPACPI_ERR "unable to allocate input device\n");
7567 thinkpad_acpi_module_exit();
7568 return -ENOMEM;
7569 } else {
7570 /* Prepare input device, but don't register */
7571 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7572 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7573 tpacpi_inputdev->id.bustype = BUS_HOST;
7574 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7575 thinkpad_id.vendor :
7576 PCI_VENDOR_ID_IBM;
7577 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7578 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7579 }
7580 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7581 ret = ibm_init(&ibms_init[i]);
7582 if (ret >= 0 && *ibms_init[i].param)
7583 ret = ibms_init[i].data->write(ibms_init[i].param);
7584 if (ret < 0) {
7585 thinkpad_acpi_module_exit();
7586 return ret;
7587 }
7588 }
7589 ret = input_register_device(tpacpi_inputdev);
7590 if (ret < 0) {
7591 printk(TPACPI_ERR "unable to register input device\n");
7592 thinkpad_acpi_module_exit();
7593 return ret;
7594 } else {
7595 tp_features.input_device_registered = 1;
7596 }
7597
7598 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7599 return 0;
7600 }
7601
7602 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7603
7604 /*
7605 * DMI matching for module autoloading
7606 *
7607 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7608 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7609 *
7610 * Only models listed in thinkwiki will be supported, so add yours
7611 * if it is not there yet.
7612 */
7613 #define IBM_BIOS_MODULE_ALIAS(__type) \
7614 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7615
7616 /* Non-ancient thinkpads */
7617 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7618 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7619
7620 /* Ancient thinkpad BIOSes have to be identified by
7621 * BIOS type or model number, and there are far less
7622 * BIOS types than model numbers... */
7623 IBM_BIOS_MODULE_ALIAS("I[BDHIMNOTWVYZ]");
7624 IBM_BIOS_MODULE_ALIAS("1[0368A-GIKM-PST]");
7625 IBM_BIOS_MODULE_ALIAS("K[UX-Z]");
7626
7627 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7628 MODULE_DESCRIPTION(TPACPI_DESC);
7629 MODULE_VERSION(TPACPI_VERSION);
7630 MODULE_LICENSE("GPL");
7631
7632 module_init(thinkpad_acpi_module_init);
7633 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree