?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ACPI: thinkpad-acpi: preserve radio state across shutdown
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blob27d709bac98f50194f763a427d2963a4e3d06d73
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2008 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 "0.21"
25 #define TPACPI_SYSFS_VERSION 0x020200
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/kthread.h>
58 #include <linux/freezer.h>
59 #include <linux/delay.h>
60
61 #include <linux/nvram.h>
62 #include <linux/proc_fs.h>
63 #include <linux/sysfs.h>
64 #include <linux/backlight.h>
65 #include <linux/fb.h>
66 #include <linux/platform_device.h>
67 #include <linux/hwmon.h>
68 #include <linux/hwmon-sysfs.h>
69 #include <linux/input.h>
70 #include <linux/leds.h>
71 #include <linux/rfkill.h>
72 #include <asm/uaccess.h>
73
74 #include <linux/dmi.h>
75 #include <linux/jiffies.h>
76 #include <linux/workqueue.h>
77
78 #include <acpi/acpi_drivers.h>
79
80 #include <linux/pci_ids.h>
81
82
83 /* ThinkPad CMOS commands */
84 #define TP_CMOS_VOLUME_DOWN 0
85 #define TP_CMOS_VOLUME_UP 1
86 #define TP_CMOS_VOLUME_MUTE 2
87 #define TP_CMOS_BRIGHTNESS_UP 4
88 #define TP_CMOS_BRIGHTNESS_DOWN 5
89 #define TP_CMOS_THINKLIGHT_ON 12
90 #define TP_CMOS_THINKLIGHT_OFF 13
91
92 /* NVRAM Addresses */
93 enum tp_nvram_addr {
94 TP_NVRAM_ADDR_HK2 = 0x57,
95 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
96 TP_NVRAM_ADDR_VIDEO = 0x59,
97 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
98 TP_NVRAM_ADDR_MIXER = 0x60,
99 };
100
101 /* NVRAM bit masks */
102 enum {
103 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
104 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
105 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
106 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
107 TP_NVRAM_MASK_THINKLIGHT = 0x10,
108 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
109 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
110 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
111 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
112 TP_NVRAM_MASK_MUTE = 0x40,
113 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
114 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
115 TP_NVRAM_POS_LEVEL_VOLUME = 0,
116 };
117
118 /* ACPI HIDs */
119 #define TPACPI_ACPI_HKEY_HID "IBM0068"
120
121 /* Input IDs */
122 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
123 #define TPACPI_HKEY_INPUT_VERSION 0x4101
124
125 /* ACPI \WGSV commands */
126 enum {
127 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
128 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
129 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
130 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
131 };
132
133 /* TP_ACPI_WGSV_GET_STATE bits */
134 enum {
135 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
136 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
137 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
138 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
139 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
140 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
141 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
142 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
143 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
144 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
145 };
146
147 /****************************************************************************
148 * Main driver
149 */
150
151 #define TPACPI_NAME "thinkpad"
152 #define TPACPI_DESC "ThinkPad ACPI Extras"
153 #define TPACPI_FILE TPACPI_NAME "_acpi"
154 #define TPACPI_URL "http://ibm-acpi.sf.net/"
155 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
156
157 #define TPACPI_PROC_DIR "ibm"
158 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
159 #define TPACPI_DRVR_NAME TPACPI_FILE
160 #define TPACPI_DRVR_SHORTNAME "tpacpi"
161 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
162
163 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
164 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
165
166 #define TPACPI_MAX_ACPI_ARGS 3
167
168 /* rfkill switches */
169 enum {
170 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
171 TPACPI_RFK_WWAN_SW_ID,
172 };
173
174 /* Debugging */
175 #define TPACPI_LOG TPACPI_FILE ": "
176 #define TPACPI_ERR KERN_ERR TPACPI_LOG
177 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
178 #define TPACPI_INFO KERN_INFO TPACPI_LOG
179 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
180
181 #define TPACPI_DBG_ALL 0xffff
182 #define TPACPI_DBG_INIT 0x0001
183 #define TPACPI_DBG_EXIT 0x0002
184 #define dbg_printk(a_dbg_level, format, arg...) \
185 do { if (dbg_level & a_dbg_level) \
186 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
187 } while (0)
188 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
189 #define vdbg_printk(a_dbg_level, format, arg...) \
190 dbg_printk(a_dbg_level, format, ## arg)
191 static const char *str_supported(int is_supported);
192 #else
193 #define vdbg_printk(a_dbg_level, format, arg...)
194 #endif
195
196 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
197 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
198 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
199
200
201 /****************************************************************************
202 * Driver-wide structs and misc. variables
203 */
204
205 struct ibm_struct;
206
207 struct tp_acpi_drv_struct {
208 const struct acpi_device_id *hid;
209 struct acpi_driver *driver;
210
211 void (*notify) (struct ibm_struct *, u32);
212 acpi_handle *handle;
213 u32 type;
214 struct acpi_device *device;
215 };
216
217 struct ibm_struct {
218 char *name;
219
220 int (*read) (char *);
221 int (*write) (char *);
222 void (*exit) (void);
223 void (*resume) (void);
224 void (*suspend) (pm_message_t state);
225 void (*shutdown) (void);
226
227 struct list_head all_drivers;
228
229 struct tp_acpi_drv_struct *acpi;
230
231 struct {
232 u8 acpi_driver_registered:1;
233 u8 acpi_notify_installed:1;
234 u8 proc_created:1;
235 u8 init_called:1;
236 u8 experimental:1;
237 } flags;
238 };
239
240 struct ibm_init_struct {
241 char param[32];
242
243 int (*init) (struct ibm_init_struct *);
244 struct ibm_struct *data;
245 };
246
247 static struct {
248 #ifdef CONFIG_THINKPAD_ACPI_BAY
249 u32 bay_status:1;
250 u32 bay_eject:1;
251 u32 bay_status2:1;
252 u32 bay_eject2:1;
253 #endif
254 u32 bluetooth:1;
255 u32 hotkey:1;
256 u32 hotkey_mask:1;
257 u32 hotkey_wlsw:1;
258 u32 hotkey_tablet:1;
259 u32 light:1;
260 u32 light_status:1;
261 u32 bright_16levels:1;
262 u32 bright_acpimode:1;
263 u32 wan:1;
264 u32 fan_ctrl_status_undef:1;
265 u32 input_device_registered:1;
266 u32 platform_drv_registered:1;
267 u32 platform_drv_attrs_registered:1;
268 u32 sensors_pdrv_registered:1;
269 u32 sensors_pdrv_attrs_registered:1;
270 u32 sensors_pdev_attrs_registered:1;
271 u32 hotkey_poll_active:1;
272 } tp_features;
273
274 static struct {
275 u16 hotkey_mask_ff:1;
276 u16 bright_cmos_ec_unsync:1;
277 } tp_warned;
278
279 struct thinkpad_id_data {
280 unsigned int vendor; /* ThinkPad vendor:
281 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
282
283 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
284 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
285
286 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
287 u16 ec_model;
288
289 char *model_str; /* ThinkPad T43 */
290 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
291 };
292 static struct thinkpad_id_data thinkpad_id;
293
294 static enum {
295 TPACPI_LIFE_INIT = 0,
296 TPACPI_LIFE_RUNNING,
297 TPACPI_LIFE_EXITING,
298 } tpacpi_lifecycle;
299
300 static int experimental;
301 static u32 dbg_level;
302
303 static struct workqueue_struct *tpacpi_wq;
304
305 /* Special LED class that can defer work */
306 struct tpacpi_led_classdev {
307 struct led_classdev led_classdev;
308 struct work_struct work;
309 enum led_brightness new_brightness;
310 unsigned int led;
311 };
312
313 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
314 static int dbg_wlswemul;
315 static int tpacpi_wlsw_emulstate;
316 static int dbg_bluetoothemul;
317 static int tpacpi_bluetooth_emulstate;
318 static int dbg_wwanemul;
319 static int tpacpi_wwan_emulstate;
320 #endif
321
322
323 /****************************************************************************
324 ****************************************************************************
325 *
326 * ACPI Helpers and device model
327 *
328 ****************************************************************************
329 ****************************************************************************/
330
331 /*************************************************************************
332 * ACPI basic handles
333 */
334
335 static acpi_handle root_handle;
336
337 #define TPACPI_HANDLE(object, parent, paths...) \
338 static acpi_handle object##_handle; \
339 static acpi_handle *object##_parent = &parent##_handle; \
340 static char *object##_path; \
341 static char *object##_paths[] = { paths }
342
343 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
344 "\\_SB.PCI.ISA.EC", /* 570 */
345 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
346 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
347 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
348 "\\_SB.PCI0.ICH3.EC0", /* R31 */
349 "\\_SB.PCI0.LPC.EC", /* all others */
350 );
351
352 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
353 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
354
355 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
356 /* T4x, X31, X40 */
357 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
358 "\\CMS", /* R40, R40e */
359 ); /* all others */
360
361 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
362 "^HKEY", /* R30, R31 */
363 "HKEY", /* all others */
364 ); /* 570 */
365
366 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
367 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
368 "\\_SB.PCI0.VID0", /* 770e */
369 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
370 "\\_SB.PCI0.AGP.VID", /* all others */
371 ); /* R30, R31 */
372
373
374 /*************************************************************************
375 * ACPI helpers
376 */
377
378 static int acpi_evalf(acpi_handle handle,
379 void *res, char *method, char *fmt, ...)
380 {
381 char *fmt0 = fmt;
382 struct acpi_object_list params;
383 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
384 struct acpi_buffer result, *resultp;
385 union acpi_object out_obj;
386 acpi_status status;
387 va_list ap;
388 char res_type;
389 int success;
390 int quiet;
391
392 if (!*fmt) {
393 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
394 return 0;
395 }
396
397 if (*fmt == 'q') {
398 quiet = 1;
399 fmt++;
400 } else
401 quiet = 0;
402
403 res_type = *(fmt++);
404
405 params.count = 0;
406 params.pointer = &in_objs[0];
407
408 va_start(ap, fmt);
409 while (*fmt) {
410 char c = *(fmt++);
411 switch (c) {
412 case 'd': /* int */
413 in_objs[params.count].integer.value = va_arg(ap, int);
414 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
415 break;
416 /* add more types as needed */
417 default:
418 printk(TPACPI_ERR "acpi_evalf() called "
419 "with invalid format character '%c'\n", c);
420 return 0;
421 }
422 }
423 va_end(ap);
424
425 if (res_type != 'v') {
426 result.length = sizeof(out_obj);
427 result.pointer = &out_obj;
428 resultp = &result;
429 } else
430 resultp = NULL;
431
432 status = acpi_evaluate_object(handle, method, &params, resultp);
433
434 switch (res_type) {
435 case 'd': /* int */
436 if (res)
437 *(int *)res = out_obj.integer.value;
438 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
439 break;
440 case 'v': /* void */
441 success = status == AE_OK;
442 break;
443 /* add more types as needed */
444 default:
445 printk(TPACPI_ERR "acpi_evalf() called "
446 "with invalid format character '%c'\n", res_type);
447 return 0;
448 }
449
450 if (!success && !quiet)
451 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
452 method, fmt0, status);
453
454 return success;
455 }
456
457 static int acpi_ec_read(int i, u8 *p)
458 {
459 int v;
460
461 if (ecrd_handle) {
462 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
463 return 0;
464 *p = v;
465 } else {
466 if (ec_read(i, p) < 0)
467 return 0;
468 }
469
470 return 1;
471 }
472
473 static int acpi_ec_write(int i, u8 v)
474 {
475 if (ecwr_handle) {
476 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
477 return 0;
478 } else {
479 if (ec_write(i, v) < 0)
480 return 0;
481 }
482
483 return 1;
484 }
485
486 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
487 static int _sta(acpi_handle handle)
488 {
489 int status;
490
491 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
492 status = 0;
493
494 return status;
495 }
496 #endif
497
498 static int issue_thinkpad_cmos_command(int cmos_cmd)
499 {
500 if (!cmos_handle)
501 return -ENXIO;
502
503 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
504 return -EIO;
505
506 return 0;
507 }
508
509 /*************************************************************************
510 * ACPI device model
511 */
512
513 #define TPACPI_ACPIHANDLE_INIT(object) \
514 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
515 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
516
517 static void drv_acpi_handle_init(char *name,
518 acpi_handle *handle, acpi_handle parent,
519 char **paths, int num_paths, char **path)
520 {
521 int i;
522 acpi_status status;
523
524 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
525 name);
526
527 for (i = 0; i < num_paths; i++) {
528 status = acpi_get_handle(parent, paths[i], handle);
529 if (ACPI_SUCCESS(status)) {
530 *path = paths[i];
531 dbg_printk(TPACPI_DBG_INIT,
532 "Found ACPI handle %s for %s\n",
533 *path, name);
534 return;
535 }
536 }
537
538 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
539 name);
540 *handle = NULL;
541 }
542
543 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
544 {
545 struct ibm_struct *ibm = data;
546
547 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
548 return;
549
550 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
551 return;
552
553 ibm->acpi->notify(ibm, event);
554 }
555
556 static int __init setup_acpi_notify(struct ibm_struct *ibm)
557 {
558 acpi_status status;
559 int rc;
560
561 BUG_ON(!ibm->acpi);
562
563 if (!*ibm->acpi->handle)
564 return 0;
565
566 vdbg_printk(TPACPI_DBG_INIT,
567 "setting up ACPI notify for %s\n", ibm->name);
568
569 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
570 if (rc < 0) {
571 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
572 ibm->name, rc);
573 return -ENODEV;
574 }
575
576 ibm->acpi->device->driver_data = ibm;
577 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
578 TPACPI_ACPI_EVENT_PREFIX,
579 ibm->name);
580
581 status = acpi_install_notify_handler(*ibm->acpi->handle,
582 ibm->acpi->type, dispatch_acpi_notify, ibm);
583 if (ACPI_FAILURE(status)) {
584 if (status == AE_ALREADY_EXISTS) {
585 printk(TPACPI_NOTICE
586 "another device driver is already "
587 "handling %s events\n", ibm->name);
588 } else {
589 printk(TPACPI_ERR
590 "acpi_install_notify_handler(%s) failed: %d\n",
591 ibm->name, status);
592 }
593 return -ENODEV;
594 }
595 ibm->flags.acpi_notify_installed = 1;
596 return 0;
597 }
598
599 static int __init tpacpi_device_add(struct acpi_device *device)
600 {
601 return 0;
602 }
603
604 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
605 {
606 int rc;
607
608 dbg_printk(TPACPI_DBG_INIT,
609 "registering %s as an ACPI driver\n", ibm->name);
610
611 BUG_ON(!ibm->acpi);
612
613 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
614 if (!ibm->acpi->driver) {
615 printk(TPACPI_ERR
616 "failed to allocate memory for ibm->acpi->driver\n");
617 return -ENOMEM;
618 }
619
620 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
621 ibm->acpi->driver->ids = ibm->acpi->hid;
622
623 ibm->acpi->driver->ops.add = &tpacpi_device_add;
624
625 rc = acpi_bus_register_driver(ibm->acpi->driver);
626 if (rc < 0) {
627 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
628 ibm->name, rc);
629 kfree(ibm->acpi->driver);
630 ibm->acpi->driver = NULL;
631 } else if (!rc)
632 ibm->flags.acpi_driver_registered = 1;
633
634 return rc;
635 }
636
637
638 /****************************************************************************
639 ****************************************************************************
640 *
641 * Procfs Helpers
642 *
643 ****************************************************************************
644 ****************************************************************************/
645
646 static int dispatch_procfs_read(char *page, char **start, off_t off,
647 int count, int *eof, void *data)
648 {
649 struct ibm_struct *ibm = data;
650 int len;
651
652 if (!ibm || !ibm->read)
653 return -EINVAL;
654
655 len = ibm->read(page);
656 if (len < 0)
657 return len;
658
659 if (len <= off + count)
660 *eof = 1;
661 *start = page + off;
662 len -= off;
663 if (len > count)
664 len = count;
665 if (len < 0)
666 len = 0;
667
668 return len;
669 }
670
671 static int dispatch_procfs_write(struct file *file,
672 const char __user *userbuf,
673 unsigned long count, void *data)
674 {
675 struct ibm_struct *ibm = data;
676 char *kernbuf;
677 int ret;
678
679 if (!ibm || !ibm->write)
680 return -EINVAL;
681
682 kernbuf = kmalloc(count + 2, GFP_KERNEL);
683 if (!kernbuf)
684 return -ENOMEM;
685
686 if (copy_from_user(kernbuf, userbuf, count)) {
687 kfree(kernbuf);
688 return -EFAULT;
689 }
690
691 kernbuf[count] = 0;
692 strcat(kernbuf, ",");
693 ret = ibm->write(kernbuf);
694 if (ret == 0)
695 ret = count;
696
697 kfree(kernbuf);
698
699 return ret;
700 }
701
702 static char *next_cmd(char **cmds)
703 {
704 char *start = *cmds;
705 char *end;
706
707 while ((end = strchr(start, ',')) && end == start)
708 start = end + 1;
709
710 if (!end)
711 return NULL;
712
713 *end = 0;
714 *cmds = end + 1;
715 return start;
716 }
717
718
719 /****************************************************************************
720 ****************************************************************************
721 *
722 * Device model: input, hwmon and platform
723 *
724 ****************************************************************************
725 ****************************************************************************/
726
727 static struct platform_device *tpacpi_pdev;
728 static struct platform_device *tpacpi_sensors_pdev;
729 static struct device *tpacpi_hwmon;
730 static struct input_dev *tpacpi_inputdev;
731 static struct mutex tpacpi_inputdev_send_mutex;
732 static LIST_HEAD(tpacpi_all_drivers);
733
734 static int tpacpi_suspend_handler(struct platform_device *pdev,
735 pm_message_t state)
736 {
737 struct ibm_struct *ibm, *itmp;
738
739 list_for_each_entry_safe(ibm, itmp,
740 &tpacpi_all_drivers,
741 all_drivers) {
742 if (ibm->suspend)
743 (ibm->suspend)(state);
744 }
745
746 return 0;
747 }
748
749 static int tpacpi_resume_handler(struct platform_device *pdev)
750 {
751 struct ibm_struct *ibm, *itmp;
752
753 list_for_each_entry_safe(ibm, itmp,
754 &tpacpi_all_drivers,
755 all_drivers) {
756 if (ibm->resume)
757 (ibm->resume)();
758 }
759
760 return 0;
761 }
762
763 static void tpacpi_shutdown_handler(struct platform_device *pdev)
764 {
765 struct ibm_struct *ibm, *itmp;
766
767 list_for_each_entry_safe(ibm, itmp,
768 &tpacpi_all_drivers,
769 all_drivers) {
770 if (ibm->shutdown)
771 (ibm->shutdown)();
772 }
773 }
774
775 static struct platform_driver tpacpi_pdriver = {
776 .driver = {
777 .name = TPACPI_DRVR_NAME,
778 .owner = THIS_MODULE,
779 },
780 .suspend = tpacpi_suspend_handler,
781 .resume = tpacpi_resume_handler,
782 .shutdown = tpacpi_shutdown_handler,
783 };
784
785 static struct platform_driver tpacpi_hwmon_pdriver = {
786 .driver = {
787 .name = TPACPI_HWMON_DRVR_NAME,
788 .owner = THIS_MODULE,
789 },
790 };
791
792 /*************************************************************************
793 * sysfs support helpers
794 */
795
796 struct attribute_set {
797 unsigned int members, max_members;
798 struct attribute_group group;
799 };
800
801 struct attribute_set_obj {
802 struct attribute_set s;
803 struct attribute *a;
804 } __attribute__((packed));
805
806 static struct attribute_set *create_attr_set(unsigned int max_members,
807 const char *name)
808 {
809 struct attribute_set_obj *sobj;
810
811 if (max_members == 0)
812 return NULL;
813
814 /* Allocates space for implicit NULL at the end too */
815 sobj = kzalloc(sizeof(struct attribute_set_obj) +
816 max_members * sizeof(struct attribute *),
817 GFP_KERNEL);
818 if (!sobj)
819 return NULL;
820 sobj->s.max_members = max_members;
821 sobj->s.group.attrs = &sobj->a;
822 sobj->s.group.name = name;
823
824 return &sobj->s;
825 }
826
827 #define destroy_attr_set(_set) \
828 kfree(_set);
829
830 /* not multi-threaded safe, use it in a single thread per set */
831 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
832 {
833 if (!s || !attr)
834 return -EINVAL;
835
836 if (s->members >= s->max_members)
837 return -ENOMEM;
838
839 s->group.attrs[s->members] = attr;
840 s->members++;
841
842 return 0;
843 }
844
845 static int add_many_to_attr_set(struct attribute_set *s,
846 struct attribute **attr,
847 unsigned int count)
848 {
849 int i, res;
850
851 for (i = 0; i < count; i++) {
852 res = add_to_attr_set(s, attr[i]);
853 if (res)
854 return res;
855 }
856
857 return 0;
858 }
859
860 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
861 {
862 sysfs_remove_group(kobj, &s->group);
863 destroy_attr_set(s);
864 }
865
866 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
867 sysfs_create_group(_kobj, &_attr_set->group)
868
869 static int parse_strtoul(const char *buf,
870 unsigned long max, unsigned long *value)
871 {
872 char *endp;
873
874 while (*buf && isspace(*buf))
875 buf++;
876 *value = simple_strtoul(buf, &endp, 0);
877 while (*endp && isspace(*endp))
878 endp++;
879 if (*endp || *value > max)
880 return -EINVAL;
881
882 return 0;
883 }
884
885 static void tpacpi_disable_brightness_delay(void)
886 {
887 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
888 printk(TPACPI_NOTICE
889 "ACPI backlight control delay disabled\n");
890 }
891
892 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
893 {
894 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
895 union acpi_object *obj;
896 int rc;
897
898 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
899 obj = (union acpi_object *)buffer.pointer;
900 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
901 printk(TPACPI_ERR "Unknown _BCL data, "
902 "please report this to %s\n", TPACPI_MAIL);
903 rc = 0;
904 } else {
905 rc = obj->package.count;
906 }
907 } else {
908 return 0;
909 }
910
911 kfree(buffer.pointer);
912 return rc;
913 }
914
915 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
916 u32 lvl, void *context, void **rv)
917 {
918 char name[ACPI_PATH_SEGMENT_LENGTH];
919 struct acpi_buffer buffer = { sizeof(name), &name };
920
921 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
922 !strncmp("_BCL", name, sizeof(name) - 1)) {
923 BUG_ON(!rv || !*rv);
924 **(int **)rv = tpacpi_query_bcl_levels(handle);
925 return AE_CTRL_TERMINATE;
926 } else {
927 return AE_OK;
928 }
929 }
930
931 /*
932 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
933 */
934 static int __init tpacpi_check_std_acpi_brightness_support(void)
935 {
936 int status;
937 int bcl_levels = 0;
938 void *bcl_ptr = &bcl_levels;
939
940 if (!vid_handle) {
941 TPACPI_ACPIHANDLE_INIT(vid);
942 }
943 if (!vid_handle)
944 return 0;
945
946 /*
947 * Search for a _BCL method, and execute it. This is safe on all
948 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
949 * BIOS in ACPI backlight control mode. We do NOT have to care
950 * about calling the _BCL method in an enabled video device, any
951 * will do for our purposes.
952 */
953
954 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
955 tpacpi_acpi_walk_find_bcl, NULL,
956 &bcl_ptr);
957
958 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
959 tp_features.bright_acpimode = 1;
960 return (bcl_levels - 2);
961 }
962
963 return 0;
964 }
965
966 static int __init tpacpi_new_rfkill(const unsigned int id,
967 struct rfkill **rfk,
968 const enum rfkill_type rfktype,
969 const char *name,
970 int (*toggle_radio)(void *, enum rfkill_state),
971 int (*get_state)(void *, enum rfkill_state *))
972 {
973 int res;
974 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
975
976 res = get_state(NULL, &initial_state);
977 if (res < 0) {
978 printk(TPACPI_ERR
979 "failed to read initial state for %s, error %d; "
980 "will turn radio off\n", name, res);
981 } else {
982 /* try to set the initial state as the default for the rfkill
983 * type, since we ask the firmware to preserve it across S5 in
984 * NVRAM */
985 rfkill_set_default(rfktype,
986 (initial_state == RFKILL_STATE_UNBLOCKED) ?
987 RFKILL_STATE_UNBLOCKED :
988 RFKILL_STATE_SOFT_BLOCKED);
989 }
990
991 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
992 if (!*rfk) {
993 printk(TPACPI_ERR
994 "failed to allocate memory for rfkill class\n");
995 return -ENOMEM;
996 }
997
998 (*rfk)->name = name;
999 (*rfk)->get_state = get_state;
1000 (*rfk)->toggle_radio = toggle_radio;
1001 (*rfk)->state = initial_state;
1002
1003 res = rfkill_register(*rfk);
1004 if (res < 0) {
1005 printk(TPACPI_ERR
1006 "failed to register %s rfkill switch: %d\n",
1007 name, res);
1008 rfkill_free(*rfk);
1009 *rfk = NULL;
1010 return res;
1011 }
1012
1013 return 0;
1014 }
1015
1016 /*************************************************************************
1017 * thinkpad-acpi driver attributes
1018 */
1019
1020 /* interface_version --------------------------------------------------- */
1021 static ssize_t tpacpi_driver_interface_version_show(
1022 struct device_driver *drv,
1023 char *buf)
1024 {
1025 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1026 }
1027
1028 static DRIVER_ATTR(interface_version, S_IRUGO,
1029 tpacpi_driver_interface_version_show, NULL);
1030
1031 /* debug_level --------------------------------------------------------- */
1032 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1033 char *buf)
1034 {
1035 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1036 }
1037
1038 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1039 const char *buf, size_t count)
1040 {
1041 unsigned long t;
1042
1043 if (parse_strtoul(buf, 0xffff, &t))
1044 return -EINVAL;
1045
1046 dbg_level = t;
1047
1048 return count;
1049 }
1050
1051 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1052 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1053
1054 /* version ------------------------------------------------------------- */
1055 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1056 char *buf)
1057 {
1058 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1059 TPACPI_DESC, TPACPI_VERSION);
1060 }
1061
1062 static DRIVER_ATTR(version, S_IRUGO,
1063 tpacpi_driver_version_show, NULL);
1064
1065 /* --------------------------------------------------------------------- */
1066
1067 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1068
1069 static void tpacpi_send_radiosw_update(void);
1070
1071 /* wlsw_emulstate ------------------------------------------------------ */
1072 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1073 char *buf)
1074 {
1075 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1076 }
1077
1078 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1079 const char *buf, size_t count)
1080 {
1081 unsigned long t;
1082
1083 if (parse_strtoul(buf, 1, &t))
1084 return -EINVAL;
1085
1086 if (tpacpi_wlsw_emulstate != t) {
1087 tpacpi_wlsw_emulstate = !!t;
1088 tpacpi_send_radiosw_update();
1089 } else
1090 tpacpi_wlsw_emulstate = !!t;
1091
1092 return count;
1093 }
1094
1095 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1096 tpacpi_driver_wlsw_emulstate_show,
1097 tpacpi_driver_wlsw_emulstate_store);
1098
1099 /* bluetooth_emulstate ------------------------------------------------- */
1100 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1101 struct device_driver *drv,
1102 char *buf)
1103 {
1104 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1105 }
1106
1107 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1108 struct device_driver *drv,
1109 const char *buf, size_t count)
1110 {
1111 unsigned long t;
1112
1113 if (parse_strtoul(buf, 1, &t))
1114 return -EINVAL;
1115
1116 tpacpi_bluetooth_emulstate = !!t;
1117
1118 return count;
1119 }
1120
1121 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1122 tpacpi_driver_bluetooth_emulstate_show,
1123 tpacpi_driver_bluetooth_emulstate_store);
1124
1125 /* wwan_emulstate ------------------------------------------------- */
1126 static ssize_t tpacpi_driver_wwan_emulstate_show(
1127 struct device_driver *drv,
1128 char *buf)
1129 {
1130 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1131 }
1132
1133 static ssize_t tpacpi_driver_wwan_emulstate_store(
1134 struct device_driver *drv,
1135 const char *buf, size_t count)
1136 {
1137 unsigned long t;
1138
1139 if (parse_strtoul(buf, 1, &t))
1140 return -EINVAL;
1141
1142 tpacpi_wwan_emulstate = !!t;
1143
1144 return count;
1145 }
1146
1147 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1148 tpacpi_driver_wwan_emulstate_show,
1149 tpacpi_driver_wwan_emulstate_store);
1150
1151 #endif
1152
1153 /* --------------------------------------------------------------------- */
1154
1155 static struct driver_attribute *tpacpi_driver_attributes[] = {
1156 &driver_attr_debug_level, &driver_attr_version,
1157 &driver_attr_interface_version,
1158 };
1159
1160 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1161 {
1162 int i, res;
1163
1164 i = 0;
1165 res = 0;
1166 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1167 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1168 i++;
1169 }
1170
1171 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1172 if (!res && dbg_wlswemul)
1173 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1174 if (!res && dbg_bluetoothemul)
1175 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1176 if (!res && dbg_wwanemul)
1177 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1178 #endif
1179
1180 return res;
1181 }
1182
1183 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1184 {
1185 int i;
1186
1187 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1188 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1189
1190 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1191 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1192 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1193 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1194 #endif
1195 }
1196
1197 /****************************************************************************
1198 ****************************************************************************
1199 *
1200 * Subdrivers
1201 *
1202 ****************************************************************************
1203 ****************************************************************************/
1204
1205 /*************************************************************************
1206 * thinkpad-acpi init subdriver
1207 */
1208
1209 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1210 {
1211 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1212 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1213
1214 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1215 (thinkpad_id.bios_version_str) ?
1216 thinkpad_id.bios_version_str : "unknown",
1217 (thinkpad_id.ec_version_str) ?
1218 thinkpad_id.ec_version_str : "unknown");
1219
1220 if (thinkpad_id.vendor && thinkpad_id.model_str)
1221 printk(TPACPI_INFO "%s %s, model %s\n",
1222 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1223 "IBM" : ((thinkpad_id.vendor ==
1224 PCI_VENDOR_ID_LENOVO) ?
1225 "Lenovo" : "Unknown vendor"),
1226 thinkpad_id.model_str,
1227 (thinkpad_id.nummodel_str) ?
1228 thinkpad_id.nummodel_str : "unknown");
1229
1230 return 0;
1231 }
1232
1233 static int thinkpad_acpi_driver_read(char *p)
1234 {
1235 int len = 0;
1236
1237 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1238 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1239
1240 return len;
1241 }
1242
1243 static struct ibm_struct thinkpad_acpi_driver_data = {
1244 .name = "driver",
1245 .read = thinkpad_acpi_driver_read,
1246 };
1247
1248 /*************************************************************************
1249 * Hotkey subdriver
1250 */
1251
1252 enum { /* hot key scan codes (derived from ACPI DSDT) */
1253 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1254 TP_ACPI_HOTKEYSCAN_FNF2,
1255 TP_ACPI_HOTKEYSCAN_FNF3,
1256 TP_ACPI_HOTKEYSCAN_FNF4,
1257 TP_ACPI_HOTKEYSCAN_FNF5,
1258 TP_ACPI_HOTKEYSCAN_FNF6,
1259 TP_ACPI_HOTKEYSCAN_FNF7,
1260 TP_ACPI_HOTKEYSCAN_FNF8,
1261 TP_ACPI_HOTKEYSCAN_FNF9,
1262 TP_ACPI_HOTKEYSCAN_FNF10,
1263 TP_ACPI_HOTKEYSCAN_FNF11,
1264 TP_ACPI_HOTKEYSCAN_FNF12,
1265 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1266 TP_ACPI_HOTKEYSCAN_FNINSERT,
1267 TP_ACPI_HOTKEYSCAN_FNDELETE,
1268 TP_ACPI_HOTKEYSCAN_FNHOME,
1269 TP_ACPI_HOTKEYSCAN_FNEND,
1270 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1271 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1272 TP_ACPI_HOTKEYSCAN_FNSPACE,
1273 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1274 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1275 TP_ACPI_HOTKEYSCAN_MUTE,
1276 TP_ACPI_HOTKEYSCAN_THINKPAD,
1277 };
1278
1279 enum { /* Keys available through NVRAM polling */
1280 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1281 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1282 };
1283
1284 enum { /* Positions of some of the keys in hotkey masks */
1285 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1286 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1287 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1288 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1289 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1290 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1291 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1292 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1293 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1294 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1295 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1296 };
1297
1298 enum { /* NVRAM to ACPI HKEY group map */
1299 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1300 TP_ACPI_HKEY_ZOOM_MASK |
1301 TP_ACPI_HKEY_DISPSWTCH_MASK |
1302 TP_ACPI_HKEY_HIBERNATE_MASK,
1303 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1304 TP_ACPI_HKEY_BRGHTDWN_MASK,
1305 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1306 TP_ACPI_HKEY_VOLDWN_MASK |
1307 TP_ACPI_HKEY_MUTE_MASK,
1308 };
1309
1310 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1311 struct tp_nvram_state {
1312 u16 thinkpad_toggle:1;
1313 u16 zoom_toggle:1;
1314 u16 display_toggle:1;
1315 u16 thinklight_toggle:1;
1316 u16 hibernate_toggle:1;
1317 u16 displayexp_toggle:1;
1318 u16 display_state:1;
1319 u16 brightness_toggle:1;
1320 u16 volume_toggle:1;
1321 u16 mute:1;
1322
1323 u8 brightness_level;
1324 u8 volume_level;
1325 };
1326
1327 static struct task_struct *tpacpi_hotkey_task;
1328 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1329 static int hotkey_poll_freq = 10; /* Hz */
1330 static struct mutex hotkey_thread_mutex;
1331 static struct mutex hotkey_thread_data_mutex;
1332 static unsigned int hotkey_config_change;
1333
1334 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1335
1336 #define hotkey_source_mask 0U
1337
1338 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1339
1340 static struct mutex hotkey_mutex;
1341
1342 static enum { /* Reasons for waking up */
1343 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1344 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1345 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1346 } hotkey_wakeup_reason;
1347
1348 static int hotkey_autosleep_ack;
1349
1350 static int hotkey_orig_status;
1351 static u32 hotkey_orig_mask;
1352 static u32 hotkey_all_mask;
1353 static u32 hotkey_reserved_mask;
1354 static u32 hotkey_mask;
1355
1356 static unsigned int hotkey_report_mode;
1357
1358 static u16 *hotkey_keycode_map;
1359
1360 static struct attribute_set *hotkey_dev_attributes;
1361
1362 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1363 #define HOTKEY_CONFIG_CRITICAL_START \
1364 do { \
1365 mutex_lock(&hotkey_thread_data_mutex); \
1366 hotkey_config_change++; \
1367 } while (0);
1368 #define HOTKEY_CONFIG_CRITICAL_END \
1369 mutex_unlock(&hotkey_thread_data_mutex);
1370 #else
1371 #define HOTKEY_CONFIG_CRITICAL_START
1372 #define HOTKEY_CONFIG_CRITICAL_END
1373 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1374
1375 /* HKEY.MHKG() return bits */
1376 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1377
1378 static int hotkey_get_wlsw(int *status)
1379 {
1380 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1381 if (dbg_wlswemul) {
1382 *status = !!tpacpi_wlsw_emulstate;
1383 return 0;
1384 }
1385 #endif
1386 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1387 return -EIO;
1388 return 0;
1389 }
1390
1391 static int hotkey_get_tablet_mode(int *status)
1392 {
1393 int s;
1394
1395 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1396 return -EIO;
1397
1398 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1399 return 0;
1400 }
1401
1402 /*
1403 * Call with hotkey_mutex held
1404 */
1405 static int hotkey_mask_get(void)
1406 {
1407 u32 m = 0;
1408
1409 if (tp_features.hotkey_mask) {
1410 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1411 return -EIO;
1412 }
1413 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1414
1415 return 0;
1416 }
1417
1418 /*
1419 * Call with hotkey_mutex held
1420 */
1421 static int hotkey_mask_set(u32 mask)
1422 {
1423 int i;
1424 int rc = 0;
1425
1426 if (tp_features.hotkey_mask) {
1427 if (!tp_warned.hotkey_mask_ff &&
1428 (mask == 0xffff || mask == 0xffffff ||
1429 mask == 0xffffffff)) {
1430 tp_warned.hotkey_mask_ff = 1;
1431 printk(TPACPI_NOTICE
1432 "setting the hotkey mask to 0x%08x is likely "
1433 "not the best way to go about it\n", mask);
1434 printk(TPACPI_NOTICE
1435 "please consider using the driver defaults, "
1436 "and refer to up-to-date thinkpad-acpi "
1437 "documentation\n");
1438 }
1439
1440 HOTKEY_CONFIG_CRITICAL_START
1441 for (i = 0; i < 32; i++) {
1442 u32 m = 1 << i;
1443 /* enable in firmware mask only keys not in NVRAM
1444 * mode, but enable the key in the cached hotkey_mask
1445 * regardless of mode, or the key will end up
1446 * disabled by hotkey_mask_get() */
1447 if (!acpi_evalf(hkey_handle,
1448 NULL, "MHKM", "vdd", i + 1,
1449 !!((mask & ~hotkey_source_mask) & m))) {
1450 rc = -EIO;
1451 break;
1452 } else {
1453 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1454 }
1455 }
1456 HOTKEY_CONFIG_CRITICAL_END
1457
1458 /* hotkey_mask_get must be called unconditionally below */
1459 if (!hotkey_mask_get() && !rc &&
1460 (hotkey_mask & ~hotkey_source_mask) !=
1461 (mask & ~hotkey_source_mask)) {
1462 printk(TPACPI_NOTICE
1463 "requested hot key mask 0x%08x, but "
1464 "firmware forced it to 0x%08x\n",
1465 mask, hotkey_mask);
1466 }
1467 } else {
1468 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1469 HOTKEY_CONFIG_CRITICAL_START
1470 hotkey_mask = mask & hotkey_source_mask;
1471 HOTKEY_CONFIG_CRITICAL_END
1472 hotkey_mask_get();
1473 if (hotkey_mask != mask) {
1474 printk(TPACPI_NOTICE
1475 "requested hot key mask 0x%08x, "
1476 "forced to 0x%08x (NVRAM poll mask is "
1477 "0x%08x): no firmware mask support\n",
1478 mask, hotkey_mask, hotkey_source_mask);
1479 }
1480 #else
1481 hotkey_mask_get();
1482 rc = -ENXIO;
1483 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1484 }
1485
1486 return rc;
1487 }
1488
1489 static int hotkey_status_get(int *status)
1490 {
1491 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1492 return -EIO;
1493
1494 return 0;
1495 }
1496
1497 static int hotkey_status_set(int status)
1498 {
1499 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1500 return -EIO;
1501
1502 return 0;
1503 }
1504
1505 static void tpacpi_input_send_tabletsw(void)
1506 {
1507 int state;
1508
1509 if (tp_features.hotkey_tablet &&
1510 !hotkey_get_tablet_mode(&state)) {
1511 mutex_lock(&tpacpi_inputdev_send_mutex);
1512
1513 input_report_switch(tpacpi_inputdev,
1514 SW_TABLET_MODE, !!state);
1515 input_sync(tpacpi_inputdev);
1516
1517 mutex_unlock(&tpacpi_inputdev_send_mutex);
1518 }
1519 }
1520
1521 static void tpacpi_input_send_key(unsigned int scancode)
1522 {
1523 unsigned int keycode;
1524
1525 keycode = hotkey_keycode_map[scancode];
1526
1527 if (keycode != KEY_RESERVED) {
1528 mutex_lock(&tpacpi_inputdev_send_mutex);
1529
1530 input_report_key(tpacpi_inputdev, keycode, 1);
1531 if (keycode == KEY_UNKNOWN)
1532 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1533 scancode);
1534 input_sync(tpacpi_inputdev);
1535
1536 input_report_key(tpacpi_inputdev, keycode, 0);
1537 if (keycode == KEY_UNKNOWN)
1538 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1539 scancode);
1540 input_sync(tpacpi_inputdev);
1541
1542 mutex_unlock(&tpacpi_inputdev_send_mutex);
1543 }
1544 }
1545
1546 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1547 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1548
1549 static void tpacpi_hotkey_send_key(unsigned int scancode)
1550 {
1551 tpacpi_input_send_key(scancode);
1552 if (hotkey_report_mode < 2) {
1553 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1554 0x80, 0x1001 + scancode);
1555 }
1556 }
1557
1558 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1559 {
1560 u8 d;
1561
1562 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1563 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1564 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1565 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1566 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1567 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1568 }
1569 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1570 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1571 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1572 }
1573 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1574 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1575 n->displayexp_toggle =
1576 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1577 }
1578 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1579 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1580 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1581 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1582 n->brightness_toggle =
1583 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1584 }
1585 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1586 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1587 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1588 >> TP_NVRAM_POS_LEVEL_VOLUME;
1589 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1590 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1591 }
1592 }
1593
1594 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1595 do { \
1596 if ((mask & (1 << __scancode)) && \
1597 oldn->__member != newn->__member) \
1598 tpacpi_hotkey_send_key(__scancode); \
1599 } while (0)
1600
1601 #define TPACPI_MAY_SEND_KEY(__scancode) \
1602 do { if (mask & (1 << __scancode)) \
1603 tpacpi_hotkey_send_key(__scancode); } while (0)
1604
1605 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1606 struct tp_nvram_state *newn,
1607 u32 mask)
1608 {
1609 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1610 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1611 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1612 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1613
1614 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1615
1616 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1617
1618 /* handle volume */
1619 if (oldn->volume_toggle != newn->volume_toggle) {
1620 if (oldn->mute != newn->mute) {
1621 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1622 }
1623 if (oldn->volume_level > newn->volume_level) {
1624 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1625 } else if (oldn->volume_level < newn->volume_level) {
1626 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1627 } else if (oldn->mute == newn->mute) {
1628 /* repeated key presses that didn't change state */
1629 if (newn->mute) {
1630 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1631 } else if (newn->volume_level != 0) {
1632 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1633 } else {
1634 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1635 }
1636 }
1637 }
1638
1639 /* handle brightness */
1640 if (oldn->brightness_toggle != newn->brightness_toggle) {
1641 if (oldn->brightness_level < newn->brightness_level) {
1642 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1643 } else if (oldn->brightness_level > newn->brightness_level) {
1644 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1645 } else {
1646 /* repeated key presses that didn't change state */
1647 if (newn->brightness_level != 0) {
1648 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1649 } else {
1650 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1651 }
1652 }
1653 }
1654 }
1655
1656 #undef TPACPI_COMPARE_KEY
1657 #undef TPACPI_MAY_SEND_KEY
1658
1659 static int hotkey_kthread(void *data)
1660 {
1661 struct tp_nvram_state s[2];
1662 u32 mask;
1663 unsigned int si, so;
1664 unsigned long t;
1665 unsigned int change_detector, must_reset;
1666
1667 mutex_lock(&hotkey_thread_mutex);
1668
1669 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1670 goto exit;
1671
1672 set_freezable();
1673
1674 so = 0;
1675 si = 1;
1676 t = 0;
1677
1678 /* Initial state for compares */
1679 mutex_lock(&hotkey_thread_data_mutex);
1680 change_detector = hotkey_config_change;
1681 mask = hotkey_source_mask & hotkey_mask;
1682 mutex_unlock(&hotkey_thread_data_mutex);
1683 hotkey_read_nvram(&s[so], mask);
1684
1685 while (!kthread_should_stop() && hotkey_poll_freq) {
1686 if (t == 0)
1687 t = 1000/hotkey_poll_freq;
1688 t = msleep_interruptible(t);
1689 if (unlikely(kthread_should_stop()))
1690 break;
1691 must_reset = try_to_freeze();
1692 if (t > 0 && !must_reset)
1693 continue;
1694
1695 mutex_lock(&hotkey_thread_data_mutex);
1696 if (must_reset || hotkey_config_change != change_detector) {
1697 /* forget old state on thaw or config change */
1698 si = so;
1699 t = 0;
1700 change_detector = hotkey_config_change;
1701 }
1702 mask = hotkey_source_mask & hotkey_mask;
1703 mutex_unlock(&hotkey_thread_data_mutex);
1704
1705 if (likely(mask)) {
1706 hotkey_read_nvram(&s[si], mask);
1707 if (likely(si != so)) {
1708 hotkey_compare_and_issue_event(&s[so], &s[si],
1709 mask);
1710 }
1711 }
1712
1713 so = si;
1714 si ^= 1;
1715 }
1716
1717 exit:
1718 mutex_unlock(&hotkey_thread_mutex);
1719 return 0;
1720 }
1721
1722 static void hotkey_poll_stop_sync(void)
1723 {
1724 if (tpacpi_hotkey_task) {
1725 if (frozen(tpacpi_hotkey_task) ||
1726 freezing(tpacpi_hotkey_task))
1727 thaw_process(tpacpi_hotkey_task);
1728
1729 kthread_stop(tpacpi_hotkey_task);
1730 tpacpi_hotkey_task = NULL;
1731 mutex_lock(&hotkey_thread_mutex);
1732 /* at this point, the thread did exit */
1733 mutex_unlock(&hotkey_thread_mutex);
1734 }
1735 }
1736
1737 /* call with hotkey_mutex held */
1738 static void hotkey_poll_setup(int may_warn)
1739 {
1740 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1741 hotkey_poll_freq > 0 &&
1742 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1743 if (!tpacpi_hotkey_task) {
1744 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1745 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1746 if (IS_ERR(tpacpi_hotkey_task)) {
1747 tpacpi_hotkey_task = NULL;
1748 printk(TPACPI_ERR
1749 "could not create kernel thread "
1750 "for hotkey polling\n");
1751 }
1752 }
1753 } else {
1754 hotkey_poll_stop_sync();
1755 if (may_warn &&
1756 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1757 printk(TPACPI_NOTICE
1758 "hot keys 0x%08x require polling, "
1759 "which is currently disabled\n",
1760 hotkey_source_mask);
1761 }
1762 }
1763 }
1764
1765 static void hotkey_poll_setup_safe(int may_warn)
1766 {
1767 mutex_lock(&hotkey_mutex);
1768 hotkey_poll_setup(may_warn);
1769 mutex_unlock(&hotkey_mutex);
1770 }
1771
1772 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1773
1774 static void hotkey_poll_setup_safe(int __unused)
1775 {
1776 }
1777
1778 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1779
1780 static int hotkey_inputdev_open(struct input_dev *dev)
1781 {
1782 switch (tpacpi_lifecycle) {
1783 case TPACPI_LIFE_INIT:
1784 /*
1785 * hotkey_init will call hotkey_poll_setup_safe
1786 * at the appropriate moment
1787 */
1788 return 0;
1789 case TPACPI_LIFE_EXITING:
1790 return -EBUSY;
1791 case TPACPI_LIFE_RUNNING:
1792 hotkey_poll_setup_safe(0);
1793 return 0;
1794 }
1795
1796 /* Should only happen if tpacpi_lifecycle is corrupt */
1797 BUG();
1798 return -EBUSY;
1799 }
1800
1801 static void hotkey_inputdev_close(struct input_dev *dev)
1802 {
1803 /* disable hotkey polling when possible */
1804 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1805 hotkey_poll_setup_safe(0);
1806 }
1807
1808 /* sysfs hotkey enable ------------------------------------------------- */
1809 static ssize_t hotkey_enable_show(struct device *dev,
1810 struct device_attribute *attr,
1811 char *buf)
1812 {
1813 int res, status;
1814
1815 res = hotkey_status_get(&status);
1816 if (res)
1817 return res;
1818
1819 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1820 }
1821
1822 static ssize_t hotkey_enable_store(struct device *dev,
1823 struct device_attribute *attr,
1824 const char *buf, size_t count)
1825 {
1826 unsigned long t;
1827 int res;
1828
1829 if (parse_strtoul(buf, 1, &t))
1830 return -EINVAL;
1831
1832 res = hotkey_status_set(t);
1833
1834 return (res) ? res : count;
1835 }
1836
1837 static struct device_attribute dev_attr_hotkey_enable =
1838 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1839 hotkey_enable_show, hotkey_enable_store);
1840
1841 /* sysfs hotkey mask --------------------------------------------------- */
1842 static ssize_t hotkey_mask_show(struct device *dev,
1843 struct device_attribute *attr,
1844 char *buf)
1845 {
1846 int res;
1847
1848 if (mutex_lock_interruptible(&hotkey_mutex))
1849 return -ERESTARTSYS;
1850 res = hotkey_mask_get();
1851 mutex_unlock(&hotkey_mutex);
1852
1853 return (res)?
1854 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1855 }
1856
1857 static ssize_t hotkey_mask_store(struct device *dev,
1858 struct device_attribute *attr,
1859 const char *buf, size_t count)
1860 {
1861 unsigned long t;
1862 int res;
1863
1864 if (parse_strtoul(buf, 0xffffffffUL, &t))
1865 return -EINVAL;
1866
1867 if (mutex_lock_interruptible(&hotkey_mutex))
1868 return -ERESTARTSYS;
1869
1870 res = hotkey_mask_set(t);
1871
1872 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1873 hotkey_poll_setup(1);
1874 #endif
1875
1876 mutex_unlock(&hotkey_mutex);
1877
1878 return (res) ? res : count;
1879 }
1880
1881 static struct device_attribute dev_attr_hotkey_mask =
1882 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1883 hotkey_mask_show, hotkey_mask_store);
1884
1885 /* sysfs hotkey bios_enabled ------------------------------------------- */
1886 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1887 struct device_attribute *attr,
1888 char *buf)
1889 {
1890 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1891 }
1892
1893 static struct device_attribute dev_attr_hotkey_bios_enabled =
1894 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1895
1896 /* sysfs hotkey bios_mask ---------------------------------------------- */
1897 static ssize_t hotkey_bios_mask_show(struct device *dev,
1898 struct device_attribute *attr,
1899 char *buf)
1900 {
1901 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1902 }
1903
1904 static struct device_attribute dev_attr_hotkey_bios_mask =
1905 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1906
1907 /* sysfs hotkey all_mask ----------------------------------------------- */
1908 static ssize_t hotkey_all_mask_show(struct device *dev,
1909 struct device_attribute *attr,
1910 char *buf)
1911 {
1912 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1913 hotkey_all_mask | hotkey_source_mask);
1914 }
1915
1916 static struct device_attribute dev_attr_hotkey_all_mask =
1917 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1918
1919 /* sysfs hotkey recommended_mask --------------------------------------- */
1920 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1921 struct device_attribute *attr,
1922 char *buf)
1923 {
1924 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1925 (hotkey_all_mask | hotkey_source_mask)
1926 & ~hotkey_reserved_mask);
1927 }
1928
1929 static struct device_attribute dev_attr_hotkey_recommended_mask =
1930 __ATTR(hotkey_recommended_mask, S_IRUGO,
1931 hotkey_recommended_mask_show, NULL);
1932
1933 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1934
1935 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1936 static ssize_t hotkey_source_mask_show(struct device *dev,
1937 struct device_attribute *attr,
1938 char *buf)
1939 {
1940 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1941 }
1942
1943 static ssize_t hotkey_source_mask_store(struct device *dev,
1944 struct device_attribute *attr,
1945 const char *buf, size_t count)
1946 {
1947 unsigned long t;
1948
1949 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1950 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1951 return -EINVAL;
1952
1953 if (mutex_lock_interruptible(&hotkey_mutex))
1954 return -ERESTARTSYS;
1955
1956 HOTKEY_CONFIG_CRITICAL_START
1957 hotkey_source_mask = t;
1958 HOTKEY_CONFIG_CRITICAL_END
1959
1960 hotkey_poll_setup(1);
1961
1962 mutex_unlock(&hotkey_mutex);
1963
1964 return count;
1965 }
1966
1967 static struct device_attribute dev_attr_hotkey_source_mask =
1968 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1969 hotkey_source_mask_show, hotkey_source_mask_store);
1970
1971 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1972 static ssize_t hotkey_poll_freq_show(struct device *dev,
1973 struct device_attribute *attr,
1974 char *buf)
1975 {
1976 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1977 }
1978
1979 static ssize_t hotkey_poll_freq_store(struct device *dev,
1980 struct device_attribute *attr,
1981 const char *buf, size_t count)
1982 {
1983 unsigned long t;
1984
1985 if (parse_strtoul(buf, 25, &t))
1986 return -EINVAL;
1987
1988 if (mutex_lock_interruptible(&hotkey_mutex))
1989 return -ERESTARTSYS;
1990
1991 hotkey_poll_freq = t;
1992
1993 hotkey_poll_setup(1);
1994 mutex_unlock(&hotkey_mutex);
1995
1996 return count;
1997 }
1998
1999 static struct device_attribute dev_attr_hotkey_poll_freq =
2000 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2001 hotkey_poll_freq_show, hotkey_poll_freq_store);
2002
2003 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2004
2005 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2006 static ssize_t hotkey_radio_sw_show(struct device *dev,
2007 struct device_attribute *attr,
2008 char *buf)
2009 {
2010 int res, s;
2011 res = hotkey_get_wlsw(&s);
2012 if (res < 0)
2013 return res;
2014
2015 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2016 }
2017
2018 static struct device_attribute dev_attr_hotkey_radio_sw =
2019 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2020
2021 static void hotkey_radio_sw_notify_change(void)
2022 {
2023 if (tp_features.hotkey_wlsw)
2024 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2025 "hotkey_radio_sw");
2026 }
2027
2028 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2029 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2030 struct device_attribute *attr,
2031 char *buf)
2032 {
2033 int res, s;
2034 res = hotkey_get_tablet_mode(&s);
2035 if (res < 0)
2036 return res;
2037
2038 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2039 }
2040
2041 static struct device_attribute dev_attr_hotkey_tablet_mode =
2042 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2043
2044 static void hotkey_tablet_mode_notify_change(void)
2045 {
2046 if (tp_features.hotkey_tablet)
2047 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2048 "hotkey_tablet_mode");
2049 }
2050
2051 /* sysfs hotkey report_mode -------------------------------------------- */
2052 static ssize_t hotkey_report_mode_show(struct device *dev,
2053 struct device_attribute *attr,
2054 char *buf)
2055 {
2056 return snprintf(buf, PAGE_SIZE, "%d\n",
2057 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2058 }
2059
2060 static struct device_attribute dev_attr_hotkey_report_mode =
2061 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2062
2063 /* sysfs wakeup reason (pollable) -------------------------------------- */
2064 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2065 struct device_attribute *attr,
2066 char *buf)
2067 {
2068 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2069 }
2070
2071 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2072 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2073
2074 static void hotkey_wakeup_reason_notify_change(void)
2075 {
2076 if (tp_features.hotkey_mask)
2077 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2078 "wakeup_reason");
2079 }
2080
2081 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2082 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2083 struct device_attribute *attr,
2084 char *buf)
2085 {
2086 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2087 }
2088
2089 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2090 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2091 hotkey_wakeup_hotunplug_complete_show, NULL);
2092
2093 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2094 {
2095 if (tp_features.hotkey_mask)
2096 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2097 "wakeup_hotunplug_complete");
2098 }
2099
2100 /* --------------------------------------------------------------------- */
2101
2102 static struct attribute *hotkey_attributes[] __initdata = {
2103 &dev_attr_hotkey_enable.attr,
2104 &dev_attr_hotkey_bios_enabled.attr,
2105 &dev_attr_hotkey_report_mode.attr,
2106 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2107 &dev_attr_hotkey_mask.attr,
2108 &dev_attr_hotkey_all_mask.attr,
2109 &dev_attr_hotkey_recommended_mask.attr,
2110 &dev_attr_hotkey_source_mask.attr,
2111 &dev_attr_hotkey_poll_freq.attr,
2112 #endif
2113 };
2114
2115 static struct attribute *hotkey_mask_attributes[] __initdata = {
2116 &dev_attr_hotkey_bios_mask.attr,
2117 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2118 &dev_attr_hotkey_mask.attr,
2119 &dev_attr_hotkey_all_mask.attr,
2120 &dev_attr_hotkey_recommended_mask.attr,
2121 #endif
2122 &dev_attr_hotkey_wakeup_reason.attr,
2123 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2124 };
2125
2126 static void bluetooth_update_rfk(void);
2127 static void wan_update_rfk(void);
2128 static void tpacpi_send_radiosw_update(void)
2129 {
2130 int wlsw;
2131
2132 /* Sync these BEFORE sending any rfkill events */
2133 if (tp_features.bluetooth)
2134 bluetooth_update_rfk();
2135 if (tp_features.wan)
2136 wan_update_rfk();
2137
2138 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2139 mutex_lock(&tpacpi_inputdev_send_mutex);
2140
2141 input_report_switch(tpacpi_inputdev,
2142 SW_RFKILL_ALL, !!wlsw);
2143 input_sync(tpacpi_inputdev);
2144
2145 mutex_unlock(&tpacpi_inputdev_send_mutex);
2146 }
2147 hotkey_radio_sw_notify_change();
2148 }
2149
2150 static void hotkey_exit(void)
2151 {
2152 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2153 hotkey_poll_stop_sync();
2154 #endif
2155
2156 if (hotkey_dev_attributes)
2157 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2158
2159 kfree(hotkey_keycode_map);
2160
2161 if (tp_features.hotkey) {
2162 dbg_printk(TPACPI_DBG_EXIT,
2163 "restoring original hot key mask\n");
2164 /* no short-circuit boolean operator below! */
2165 if ((hotkey_mask_set(hotkey_orig_mask) |
2166 hotkey_status_set(hotkey_orig_status)) != 0)
2167 printk(TPACPI_ERR
2168 "failed to restore hot key mask "
2169 "to BIOS defaults\n");
2170 }
2171 }
2172
2173 static int __init hotkey_init(struct ibm_init_struct *iibm)
2174 {
2175 /* Requirements for changing the default keymaps:
2176 *
2177 * 1. Many of the keys are mapped to KEY_RESERVED for very
2178 * good reasons. Do not change them unless you have deep
2179 * knowledge on the IBM and Lenovo ThinkPad firmware for
2180 * the various ThinkPad models. The driver behaves
2181 * differently for KEY_RESERVED: such keys have their
2182 * hot key mask *unset* in mask_recommended, and also
2183 * in the initial hot key mask programmed into the
2184 * firmware at driver load time, which means the firm-
2185 * ware may react very differently if you change them to
2186 * something else;
2187 *
2188 * 2. You must be subscribed to the linux-thinkpad and
2189 * ibm-acpi-devel mailing lists, and you should read the
2190 * list archives since 2007 if you want to change the
2191 * keymaps. This requirement exists so that you will
2192 * know the past history of problems with the thinkpad-
2193 * acpi driver keymaps, and also that you will be
2194 * listening to any bug reports;
2195 *
2196 * 3. Do not send thinkpad-acpi specific patches directly to
2197 * for merging, *ever*. Send them to the linux-acpi
2198 * mailinglist for comments. Merging is to be done only
2199 * through acpi-test and the ACPI maintainer.
2200 *
2201 * If the above is too much to ask, don't change the keymap.
2202 * Ask the thinkpad-acpi maintainer to do it, instead.
2203 */
2204 static u16 ibm_keycode_map[] __initdata = {
2205 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2206 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2207 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2208 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2209
2210 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2211 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2212 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2213 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2214
2215 /* brightness: firmware always reacts to them, unless
2216 * X.org did some tricks in the radeon BIOS scratch
2217 * registers of *some* models */
2218 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2219 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2220
2221 /* Thinklight: firmware always react to it */
2222 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2223
2224 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2225 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2226
2227 /* Volume: firmware always react to it and reprograms
2228 * the built-in *extra* mixer. Never map it to control
2229 * another mixer by default. */
2230 KEY_RESERVED, /* 0x14: VOLUME UP */
2231 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2232 KEY_RESERVED, /* 0x16: MUTE */
2233
2234 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2235
2236 /* (assignments unknown, please report if found) */
2237 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2238 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2239 };
2240 static u16 lenovo_keycode_map[] __initdata = {
2241 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2242 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2243 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2244 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2245
2246 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2247 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2248 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2249 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2250
2251 /* These either have to go through ACPI video, or
2252 * act like in the IBM ThinkPads, so don't ever
2253 * enable them by default */
2254 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2255 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2256
2257 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2258
2259 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2260 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2261
2262 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2263 * react to it and reprograms the built-in *extra* mixer.
2264 * Never map it to control another mixer by default.
2265 *
2266 * T60?, T61, R60?, R61: firmware and EC tries to send
2267 * these over the regular keyboard, so these are no-ops,
2268 * but there are still weird bugs re. MUTE, so do not
2269 * change unless you get test reports from all Lenovo
2270 * models. May cause the BIOS to interfere with the
2271 * HDA mixer.
2272 */
2273 KEY_RESERVED, /* 0x14: VOLUME UP */
2274 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2275 KEY_RESERVED, /* 0x16: MUTE */
2276
2277 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2278
2279 /* (assignments unknown, please report if found) */
2280 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2281 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2282 };
2283
2284 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2285 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2286 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2287
2288 int res, i;
2289 int status;
2290 int hkeyv;
2291
2292 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2293
2294 BUG_ON(!tpacpi_inputdev);
2295 BUG_ON(tpacpi_inputdev->open != NULL ||
2296 tpacpi_inputdev->close != NULL);
2297
2298 TPACPI_ACPIHANDLE_INIT(hkey);
2299 mutex_init(&hotkey_mutex);
2300
2301 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2302 mutex_init(&hotkey_thread_mutex);
2303 mutex_init(&hotkey_thread_data_mutex);
2304 #endif
2305
2306 /* hotkey not supported on 570 */
2307 tp_features.hotkey = hkey_handle != NULL;
2308
2309 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2310 str_supported(tp_features.hotkey));
2311
2312 if (!tp_features.hotkey)
2313 return 1;
2314
2315 tpacpi_disable_brightness_delay();
2316
2317 hotkey_dev_attributes = create_attr_set(13, NULL);
2318 if (!hotkey_dev_attributes)
2319 return -ENOMEM;
2320 res = add_many_to_attr_set(hotkey_dev_attributes,
2321 hotkey_attributes,
2322 ARRAY_SIZE(hotkey_attributes));
2323 if (res)
2324 goto err_exit;
2325
2326 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2327 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2328 for HKEY interface version 0x100 */
2329 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2330 if ((hkeyv >> 8) != 1) {
2331 printk(TPACPI_ERR "unknown version of the "
2332 "HKEY interface: 0x%x\n", hkeyv);
2333 printk(TPACPI_ERR "please report this to %s\n",
2334 TPACPI_MAIL);
2335 } else {
2336 /*
2337 * MHKV 0x100 in A31, R40, R40e,
2338 * T4x, X31, and later
2339 */
2340 tp_features.hotkey_mask = 1;
2341 }
2342 }
2343
2344 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2345 str_supported(tp_features.hotkey_mask));
2346
2347 if (tp_features.hotkey_mask) {
2348 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2349 "MHKA", "qd")) {
2350 printk(TPACPI_ERR
2351 "missing MHKA handler, "
2352 "please report this to %s\n",
2353 TPACPI_MAIL);
2354 /* FN+F12, FN+F4, FN+F3 */
2355 hotkey_all_mask = 0x080cU;
2356 }
2357 }
2358
2359 /* hotkey_source_mask *must* be zero for
2360 * the first hotkey_mask_get */
2361 res = hotkey_status_get(&hotkey_orig_status);
2362 if (res)
2363 goto err_exit;
2364
2365 if (tp_features.hotkey_mask) {
2366 res = hotkey_mask_get();
2367 if (res)
2368 goto err_exit;
2369
2370 hotkey_orig_mask = hotkey_mask;
2371 res = add_many_to_attr_set(
2372 hotkey_dev_attributes,
2373 hotkey_mask_attributes,
2374 ARRAY_SIZE(hotkey_mask_attributes));
2375 if (res)
2376 goto err_exit;
2377 }
2378
2379 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2380 if (tp_features.hotkey_mask) {
2381 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2382 & ~hotkey_all_mask;
2383 } else {
2384 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2385 }
2386
2387 vdbg_printk(TPACPI_DBG_INIT,
2388 "hotkey source mask 0x%08x, polling freq %d\n",
2389 hotkey_source_mask, hotkey_poll_freq);
2390 #endif
2391
2392 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2393 if (dbg_wlswemul) {
2394 tp_features.hotkey_wlsw = 1;
2395 printk(TPACPI_INFO
2396 "radio switch emulation enabled\n");
2397 } else
2398 #endif
2399 /* Not all thinkpads have a hardware radio switch */
2400 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2401 tp_features.hotkey_wlsw = 1;
2402 printk(TPACPI_INFO
2403 "radio switch found; radios are %s\n",
2404 enabled(status, 0));
2405 }
2406 if (tp_features.hotkey_wlsw)
2407 res = add_to_attr_set(hotkey_dev_attributes,
2408 &dev_attr_hotkey_radio_sw.attr);
2409
2410 /* For X41t, X60t, X61t Tablets... */
2411 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2412 tp_features.hotkey_tablet = 1;
2413 printk(TPACPI_INFO
2414 "possible tablet mode switch found; "
2415 "ThinkPad in %s mode\n",
2416 (status & TP_HOTKEY_TABLET_MASK)?
2417 "tablet" : "laptop");
2418 res = add_to_attr_set(hotkey_dev_attributes,
2419 &dev_attr_hotkey_tablet_mode.attr);
2420 }
2421
2422 if (!res)
2423 res = register_attr_set_with_sysfs(
2424 hotkey_dev_attributes,
2425 &tpacpi_pdev->dev.kobj);
2426 if (res)
2427 goto err_exit;
2428
2429 /* Set up key map */
2430
2431 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2432 GFP_KERNEL);
2433 if (!hotkey_keycode_map) {
2434 printk(TPACPI_ERR
2435 "failed to allocate memory for key map\n");
2436 res = -ENOMEM;
2437 goto err_exit;
2438 }
2439
2440 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2441 dbg_printk(TPACPI_DBG_INIT,
2442 "using Lenovo default hot key map\n");
2443 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2444 TPACPI_HOTKEY_MAP_SIZE);
2445 } else {
2446 dbg_printk(TPACPI_DBG_INIT,
2447 "using IBM default hot key map\n");
2448 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2449 TPACPI_HOTKEY_MAP_SIZE);
2450 }
2451
2452 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2453 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2454 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2455 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2456 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2457 tpacpi_inputdev->keycode = hotkey_keycode_map;
2458 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2459 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2460 set_bit(hotkey_keycode_map[i],
2461 tpacpi_inputdev->keybit);
2462 } else {
2463 if (i < sizeof(hotkey_reserved_mask)*8)
2464 hotkey_reserved_mask |= 1 << i;
2465 }
2466 }
2467
2468 if (tp_features.hotkey_wlsw) {
2469 set_bit(EV_SW, tpacpi_inputdev->evbit);
2470 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2471 }
2472 if (tp_features.hotkey_tablet) {
2473 set_bit(EV_SW, tpacpi_inputdev->evbit);
2474 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2475 }
2476
2477 /* Do not issue duplicate brightness change events to
2478 * userspace */
2479 if (!tp_features.bright_acpimode)
2480 /* update bright_acpimode... */
2481 tpacpi_check_std_acpi_brightness_support();
2482
2483 if (tp_features.bright_acpimode) {
2484 printk(TPACPI_INFO
2485 "This ThinkPad has standard ACPI backlight "
2486 "brightness control, supported by the ACPI "
2487 "video driver\n");
2488 printk(TPACPI_NOTICE
2489 "Disabling thinkpad-acpi brightness events "
2490 "by default...\n");
2491
2492 /* The hotkey_reserved_mask change below is not
2493 * necessary while the keys are at KEY_RESERVED in the
2494 * default map, but better safe than sorry, leave it
2495 * here as a marker of what we have to do, especially
2496 * when we finally become able to set this at runtime
2497 * on response to X.org requests */
2498 hotkey_reserved_mask |=
2499 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2500 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2501 }
2502
2503 dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2504 res = hotkey_status_set(1);
2505 if (res) {
2506 hotkey_exit();
2507 return res;
2508 }
2509 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2510 & ~hotkey_reserved_mask)
2511 | hotkey_orig_mask);
2512 if (res < 0 && res != -ENXIO) {
2513 hotkey_exit();
2514 return res;
2515 }
2516
2517 dbg_printk(TPACPI_DBG_INIT,
2518 "legacy hot key reporting over procfs %s\n",
2519 (hotkey_report_mode < 2) ?
2520 "enabled" : "disabled");
2521
2522 tpacpi_inputdev->open = &hotkey_inputdev_open;
2523 tpacpi_inputdev->close = &hotkey_inputdev_close;
2524
2525 hotkey_poll_setup_safe(1);
2526 tpacpi_send_radiosw_update();
2527 tpacpi_input_send_tabletsw();
2528
2529 return 0;
2530
2531 err_exit:
2532 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2533 hotkey_dev_attributes = NULL;
2534
2535 return (res < 0)? res : 1;
2536 }
2537
2538 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2539 {
2540 u32 hkey;
2541 unsigned int scancode;
2542 int send_acpi_ev;
2543 int ignore_acpi_ev;
2544 int unk_ev;
2545
2546 if (event != 0x80) {
2547 printk(TPACPI_ERR
2548 "unknown HKEY notification event %d\n", event);
2549 /* forward it to userspace, maybe it knows how to handle it */
2550 acpi_bus_generate_netlink_event(
2551 ibm->acpi->device->pnp.device_class,
2552 dev_name(&ibm->acpi->device->dev),
2553 event, 0);
2554 return;
2555 }
2556
2557 while (1) {
2558 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2559 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2560 return;
2561 }
2562
2563 if (hkey == 0) {
2564 /* queue empty */
2565 return;
2566 }
2567
2568 send_acpi_ev = 1;
2569 ignore_acpi_ev = 0;
2570 unk_ev = 0;
2571
2572 switch (hkey >> 12) {
2573 case 1:
2574 /* 0x1000-0x1FFF: key presses */
2575 scancode = hkey & 0xfff;
2576 if (scancode > 0 && scancode < 0x21) {
2577 scancode--;
2578 if (!(hotkey_source_mask & (1 << scancode))) {
2579 tpacpi_input_send_key(scancode);
2580 send_acpi_ev = 0;
2581 } else {
2582 ignore_acpi_ev = 1;
2583 }
2584 } else {
2585 unk_ev = 1;
2586 }
2587 break;
2588 case 2:
2589 /* Wakeup reason */
2590 switch (hkey) {
2591 case 0x2304: /* suspend, undock */
2592 case 0x2404: /* hibernation, undock */
2593 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2594 ignore_acpi_ev = 1;
2595 break;
2596 case 0x2305: /* suspend, bay eject */
2597 case 0x2405: /* hibernation, bay eject */
2598 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2599 ignore_acpi_ev = 1;
2600 break;
2601 default:
2602 unk_ev = 1;
2603 }
2604 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2605 printk(TPACPI_INFO
2606 "woke up due to a hot-unplug "
2607 "request...\n");
2608 hotkey_wakeup_reason_notify_change();
2609 }
2610 break;
2611 case 3:
2612 /* bay-related wakeups */
2613 if (hkey == 0x3003) {
2614 hotkey_autosleep_ack = 1;
2615 printk(TPACPI_INFO
2616 "bay ejected\n");
2617 hotkey_wakeup_hotunplug_complete_notify_change();
2618 } else {
2619 unk_ev = 1;
2620 }
2621 break;
2622 case 4:
2623 /* dock-related wakeups */
2624 if (hkey == 0x4003) {
2625 hotkey_autosleep_ack = 1;
2626 printk(TPACPI_INFO
2627 "undocked\n");
2628 hotkey_wakeup_hotunplug_complete_notify_change();
2629 } else {
2630 unk_ev = 1;
2631 }
2632 break;
2633 case 5:
2634 /* 0x5000-0x5FFF: human interface helpers */
2635 switch (hkey) {
2636 case 0x5010: /* Lenovo new BIOS: brightness changed */
2637 case 0x500b: /* X61t: tablet pen inserted into bay */
2638 case 0x500c: /* X61t: tablet pen removed from bay */
2639 break;
2640 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2641 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2642 tpacpi_input_send_tabletsw();
2643 hotkey_tablet_mode_notify_change();
2644 send_acpi_ev = 0;
2645 break;
2646 case 0x5001:
2647 case 0x5002:
2648 /* LID switch events. Do not propagate */
2649 ignore_acpi_ev = 1;
2650 break;
2651 default:
2652 unk_ev = 1;
2653 }
2654 break;
2655 case 7:
2656 /* 0x7000-0x7FFF: misc */
2657 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2658 tpacpi_send_radiosw_update();
2659 send_acpi_ev = 0;
2660 break;
2661 }
2662 /* fallthrough to default */
2663 default:
2664 unk_ev = 1;
2665 }
2666 if (unk_ev) {
2667 printk(TPACPI_NOTICE
2668 "unhandled HKEY event 0x%04x\n", hkey);
2669 }
2670
2671 /* Legacy events */
2672 if (!ignore_acpi_ev &&
2673 (send_acpi_ev || hotkey_report_mode < 2)) {
2674 acpi_bus_generate_proc_event(ibm->acpi->device,
2675 event, hkey);
2676 }
2677
2678 /* netlink events */
2679 if (!ignore_acpi_ev && send_acpi_ev) {
2680 acpi_bus_generate_netlink_event(
2681 ibm->acpi->device->pnp.device_class,
2682 dev_name(&ibm->acpi->device->dev),
2683 event, hkey);
2684 }
2685 }
2686 }
2687
2688 static void hotkey_suspend(pm_message_t state)
2689 {
2690 /* Do these on suspend, we get the events on early resume! */
2691 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2692 hotkey_autosleep_ack = 0;
2693 }
2694
2695 static void hotkey_resume(void)
2696 {
2697 tpacpi_disable_brightness_delay();
2698
2699 if (hotkey_mask_get())
2700 printk(TPACPI_ERR
2701 "error while trying to read hot key mask "
2702 "from firmware\n");
2703 tpacpi_send_radiosw_update();
2704 hotkey_tablet_mode_notify_change();
2705 hotkey_wakeup_reason_notify_change();
2706 hotkey_wakeup_hotunplug_complete_notify_change();
2707 hotkey_poll_setup_safe(0);
2708 }
2709
2710 /* procfs -------------------------------------------------------------- */
2711 static int hotkey_read(char *p)
2712 {
2713 int res, status;
2714 int len = 0;
2715
2716 if (!tp_features.hotkey) {
2717 len += sprintf(p + len, "status:\t\tnot supported\n");
2718 return len;
2719 }
2720
2721 if (mutex_lock_interruptible(&hotkey_mutex))
2722 return -ERESTARTSYS;
2723 res = hotkey_status_get(&status);
2724 if (!res)
2725 res = hotkey_mask_get();
2726 mutex_unlock(&hotkey_mutex);
2727 if (res)
2728 return res;
2729
2730 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2731 if (tp_features.hotkey_mask) {
2732 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2733 len += sprintf(p + len,
2734 "commands:\tenable, disable, reset, <mask>\n");
2735 } else {
2736 len += sprintf(p + len, "mask:\t\tnot supported\n");
2737 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2738 }
2739
2740 return len;
2741 }
2742
2743 static int hotkey_write(char *buf)
2744 {
2745 int res, status;
2746 u32 mask;
2747 char *cmd;
2748
2749 if (!tp_features.hotkey)
2750 return -ENODEV;
2751
2752 if (mutex_lock_interruptible(&hotkey_mutex))
2753 return -ERESTARTSYS;
2754
2755 status = -1;
2756 mask = hotkey_mask;
2757
2758 res = 0;
2759 while ((cmd = next_cmd(&buf))) {
2760 if (strlencmp(cmd, "enable") == 0) {
2761 status = 1;
2762 } else if (strlencmp(cmd, "disable") == 0) {
2763 status = 0;
2764 } else if (strlencmp(cmd, "reset") == 0) {
2765 status = hotkey_orig_status;
2766 mask = hotkey_orig_mask;
2767 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2768 /* mask set */
2769 } else if (sscanf(cmd, "%x", &mask) == 1) {
2770 /* mask set */
2771 } else {
2772 res = -EINVAL;
2773 goto errexit;
2774 }
2775 }
2776 if (status != -1)
2777 res = hotkey_status_set(status);
2778
2779 if (!res && mask != hotkey_mask)
2780 res = hotkey_mask_set(mask);
2781
2782 errexit:
2783 mutex_unlock(&hotkey_mutex);
2784 return res;
2785 }
2786
2787 static const struct acpi_device_id ibm_htk_device_ids[] = {
2788 {TPACPI_ACPI_HKEY_HID, 0},
2789 {"", 0},
2790 };
2791
2792 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2793 .hid = ibm_htk_device_ids,
2794 .notify = hotkey_notify,
2795 .handle = &hkey_handle,
2796 .type = ACPI_DEVICE_NOTIFY,
2797 };
2798
2799 static struct ibm_struct hotkey_driver_data = {
2800 .name = "hotkey",
2801 .read = hotkey_read,
2802 .write = hotkey_write,
2803 .exit = hotkey_exit,
2804 .resume = hotkey_resume,
2805 .suspend = hotkey_suspend,
2806 .acpi = &ibm_hotkey_acpidriver,
2807 };
2808
2809 /*************************************************************************
2810 * Bluetooth subdriver
2811 */
2812
2813 enum {
2814 /* ACPI GBDC/SBDC bits */
2815 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
2816 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
2817 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
2818 off / last state */
2819 };
2820
2821 enum {
2822 /* ACPI \BLTH commands */
2823 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
2824 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
2825 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
2826 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
2827 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
2828 };
2829
2830 static struct rfkill *tpacpi_bluetooth_rfkill;
2831
2832 static void bluetooth_suspend(pm_message_t state)
2833 {
2834 /* Try to make sure radio will resume powered off */
2835 acpi_evalf(NULL, NULL, "\\BLTH", "vd",
2836 TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
2837 }
2838
2839 static int bluetooth_get_radiosw(void)
2840 {
2841 int status;
2842
2843 if (!tp_features.bluetooth)
2844 return -ENODEV;
2845
2846 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2847 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2848 return RFKILL_STATE_HARD_BLOCKED;
2849
2850 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2851 if (dbg_bluetoothemul)
2852 return (tpacpi_bluetooth_emulstate) ?
2853 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2854 #endif
2855
2856 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2857 return -EIO;
2858
2859 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
2860 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2861 }
2862
2863 static void bluetooth_update_rfk(void)
2864 {
2865 int status;
2866
2867 if (!tpacpi_bluetooth_rfkill)
2868 return;
2869
2870 status = bluetooth_get_radiosw();
2871 if (status < 0)
2872 return;
2873 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
2874 }
2875
2876 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
2877 {
2878 int status;
2879
2880 if (!tp_features.bluetooth)
2881 return -ENODEV;
2882
2883 /* WLSW overrides bluetooth in firmware/hardware, but there is no
2884 * reason to risk weird behaviour. */
2885 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
2886 && radio_on)
2887 return -EPERM;
2888
2889 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2890 if (dbg_bluetoothemul) {
2891 tpacpi_bluetooth_emulstate = !!radio_on;
2892 if (update_rfk)
2893 bluetooth_update_rfk();
2894 return 0;
2895 }
2896 #endif
2897
2898 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
2899 if (radio_on)
2900 status = TP_ACPI_BLUETOOTH_RADIOSSW;
2901 else
2902 status = 0;
2903 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2904 return -EIO;
2905
2906 if (update_rfk)
2907 bluetooth_update_rfk();
2908
2909 return 0;
2910 }
2911
2912 /* sysfs bluetooth enable ---------------------------------------------- */
2913 static ssize_t bluetooth_enable_show(struct device *dev,
2914 struct device_attribute *attr,
2915 char *buf)
2916 {
2917 int status;
2918
2919 status = bluetooth_get_radiosw();
2920 if (status < 0)
2921 return status;
2922
2923 return snprintf(buf, PAGE_SIZE, "%d\n",
2924 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
2925 }
2926
2927 static ssize_t bluetooth_enable_store(struct device *dev,
2928 struct device_attribute *attr,
2929 const char *buf, size_t count)
2930 {
2931 unsigned long t;
2932 int res;
2933
2934 if (parse_strtoul(buf, 1, &t))
2935 return -EINVAL;
2936
2937 res = bluetooth_set_radiosw(t, 1);
2938
2939 return (res) ? res : count;
2940 }
2941
2942 static struct device_attribute dev_attr_bluetooth_enable =
2943 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2944 bluetooth_enable_show, bluetooth_enable_store);
2945
2946 /* --------------------------------------------------------------------- */
2947
2948 static struct attribute *bluetooth_attributes[] = {
2949 &dev_attr_bluetooth_enable.attr,
2950 NULL
2951 };
2952
2953 static const struct attribute_group bluetooth_attr_group = {
2954 .attrs = bluetooth_attributes,
2955 };
2956
2957 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
2958 {
2959 int bts = bluetooth_get_radiosw();
2960
2961 if (bts < 0)
2962 return bts;
2963
2964 *state = bts;
2965 return 0;
2966 }
2967
2968 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
2969 {
2970 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
2971 }
2972
2973 static void bluetooth_shutdown(void)
2974 {
2975 /* Order firmware to save current state to NVRAM */
2976 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
2977 TP_ACPI_BLTH_SAVE_STATE))
2978 printk(TPACPI_NOTICE
2979 "failed to save bluetooth state to NVRAM\n");
2980 }
2981
2982 static void bluetooth_exit(void)
2983 {
2984 bluetooth_shutdown();
2985
2986 if (tpacpi_bluetooth_rfkill)
2987 rfkill_unregister(tpacpi_bluetooth_rfkill);
2988
2989 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2990 &bluetooth_attr_group);
2991 }
2992
2993 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2994 {
2995 int res;
2996 int status = 0;
2997
2998 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2999
3000 TPACPI_ACPIHANDLE_INIT(hkey);
3001
3002 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3003 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3004 tp_features.bluetooth = hkey_handle &&
3005 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3006
3007 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
3008 str_supported(tp_features.bluetooth),
3009 status);
3010
3011 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3012 if (dbg_bluetoothemul) {
3013 tp_features.bluetooth = 1;
3014 printk(TPACPI_INFO
3015 "bluetooth switch emulation enabled\n");
3016 } else
3017 #endif
3018 if (tp_features.bluetooth &&
3019 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3020 /* no bluetooth hardware present in system */
3021 tp_features.bluetooth = 0;
3022 dbg_printk(TPACPI_DBG_INIT,
3023 "bluetooth hardware not installed\n");
3024 }
3025
3026 if (!tp_features.bluetooth)
3027 return 1;
3028
3029 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3030 &bluetooth_attr_group);
3031 if (res)
3032 return res;
3033
3034 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3035 &tpacpi_bluetooth_rfkill,
3036 RFKILL_TYPE_BLUETOOTH,
3037 "tpacpi_bluetooth_sw",
3038 tpacpi_bluetooth_rfk_set,
3039 tpacpi_bluetooth_rfk_get);
3040 if (res) {
3041 bluetooth_exit();
3042 return res;
3043 }
3044
3045 return 0;
3046 }
3047
3048 /* procfs -------------------------------------------------------------- */
3049 static int bluetooth_read(char *p)
3050 {
3051 int len = 0;
3052 int status = bluetooth_get_radiosw();
3053
3054 if (!tp_features.bluetooth)
3055 len += sprintf(p + len, "status:\t\tnot supported\n");
3056 else {
3057 len += sprintf(p + len, "status:\t\t%s\n",
3058 (status == RFKILL_STATE_UNBLOCKED) ?
3059 "enabled" : "disabled");
3060 len += sprintf(p + len, "commands:\tenable, disable\n");
3061 }
3062
3063 return len;
3064 }
3065
3066 static int bluetooth_write(char *buf)
3067 {
3068 char *cmd;
3069
3070 if (!tp_features.bluetooth)
3071 return -ENODEV;
3072
3073 while ((cmd = next_cmd(&buf))) {
3074 if (strlencmp(cmd, "enable") == 0) {
3075 bluetooth_set_radiosw(1, 1);
3076 } else if (strlencmp(cmd, "disable") == 0) {
3077 bluetooth_set_radiosw(0, 1);
3078 } else
3079 return -EINVAL;
3080 }
3081
3082 return 0;
3083 }
3084
3085 static struct ibm_struct bluetooth_driver_data = {
3086 .name = "bluetooth",
3087 .read = bluetooth_read,
3088 .write = bluetooth_write,
3089 .exit = bluetooth_exit,
3090 .suspend = bluetooth_suspend,
3091 .shutdown = bluetooth_shutdown,
3092 };
3093
3094 /*************************************************************************
3095 * Wan subdriver
3096 */
3097
3098 enum {
3099 /* ACPI GWAN/SWAN bits */
3100 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3101 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3102 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3103 off / last state */
3104 };
3105
3106 static struct rfkill *tpacpi_wan_rfkill;
3107
3108 static void wan_suspend(pm_message_t state)
3109 {
3110 /* Try to make sure radio will resume powered off */
3111 acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3112 TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
3113 }
3114
3115 static int wan_get_radiosw(void)
3116 {
3117 int status;
3118
3119 if (!tp_features.wan)
3120 return -ENODEV;
3121
3122 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3123 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3124 return RFKILL_STATE_HARD_BLOCKED;
3125
3126 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3127 if (dbg_wwanemul)
3128 return (tpacpi_wwan_emulstate) ?
3129 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3130 #endif
3131
3132 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3133 return -EIO;
3134
3135 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3136 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3137 }
3138
3139 static void wan_update_rfk(void)
3140 {
3141 int status;
3142
3143 if (!tpacpi_wan_rfkill)
3144 return;
3145
3146 status = wan_get_radiosw();
3147 if (status < 0)
3148 return;
3149 rfkill_force_state(tpacpi_wan_rfkill, status);
3150 }
3151
3152 static int wan_set_radiosw(int radio_on, int update_rfk)
3153 {
3154 int status;
3155
3156 if (!tp_features.wan)
3157 return -ENODEV;
3158
3159 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3160 * reason to risk weird behaviour. */
3161 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3162 && radio_on)
3163 return -EPERM;
3164
3165 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3166 if (dbg_wwanemul) {
3167 tpacpi_wwan_emulstate = !!radio_on;
3168 if (update_rfk)
3169 wan_update_rfk();
3170 return 0;
3171 }
3172 #endif
3173
3174 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3175 if (radio_on)
3176 status = TP_ACPI_WANCARD_RADIOSSW;
3177 else
3178 status = 0;
3179 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3180 return -EIO;
3181
3182 if (update_rfk)
3183 wan_update_rfk();
3184
3185 return 0;
3186 }
3187
3188 /* sysfs wan enable ---------------------------------------------------- */
3189 static ssize_t wan_enable_show(struct device *dev,
3190 struct device_attribute *attr,
3191 char *buf)
3192 {
3193 int status;
3194
3195 status = wan_get_radiosw();
3196 if (status < 0)
3197 return status;
3198
3199 return snprintf(buf, PAGE_SIZE, "%d\n",
3200 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3201 }
3202
3203 static ssize_t wan_enable_store(struct device *dev,
3204 struct device_attribute *attr,
3205 const char *buf, size_t count)
3206 {
3207 unsigned long t;
3208 int res;
3209
3210 if (parse_strtoul(buf, 1, &t))
3211 return -EINVAL;
3212
3213 res = wan_set_radiosw(t, 1);
3214
3215 return (res) ? res : count;
3216 }
3217
3218 static struct device_attribute dev_attr_wan_enable =
3219 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3220 wan_enable_show, wan_enable_store);
3221
3222 /* --------------------------------------------------------------------- */
3223
3224 static struct attribute *wan_attributes[] = {
3225 &dev_attr_wan_enable.attr,
3226 NULL
3227 };
3228
3229 static const struct attribute_group wan_attr_group = {
3230 .attrs = wan_attributes,
3231 };
3232
3233 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3234 {
3235 int wans = wan_get_radiosw();
3236
3237 if (wans < 0)
3238 return wans;
3239
3240 *state = wans;
3241 return 0;
3242 }
3243
3244 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3245 {
3246 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3247 }
3248
3249 static void wan_shutdown(void)
3250 {
3251 /* Order firmware to save current state to NVRAM */
3252 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3253 TP_ACPI_WGSV_SAVE_STATE))
3254 printk(TPACPI_NOTICE
3255 "failed to save WWAN state to NVRAM\n");
3256 }
3257
3258 static void wan_exit(void)
3259 {
3260 wan_shutdown();
3261
3262 if (tpacpi_wan_rfkill)
3263 rfkill_unregister(tpacpi_wan_rfkill);
3264
3265 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3266 &wan_attr_group);
3267 }
3268
3269 static int __init wan_init(struct ibm_init_struct *iibm)
3270 {
3271 int res;
3272 int status = 0;
3273
3274 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3275
3276 TPACPI_ACPIHANDLE_INIT(hkey);
3277
3278 tp_features.wan = hkey_handle &&
3279 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3280
3281 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3282 str_supported(tp_features.wan),
3283 status);
3284
3285 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3286 if (dbg_wwanemul) {
3287 tp_features.wan = 1;
3288 printk(TPACPI_INFO
3289 "wwan switch emulation enabled\n");
3290 } else
3291 #endif
3292 if (tp_features.wan &&
3293 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3294 /* no wan hardware present in system */
3295 tp_features.wan = 0;
3296 dbg_printk(TPACPI_DBG_INIT,
3297 "wan hardware not installed\n");
3298 }
3299
3300 if (!tp_features.wan)
3301 return 1;
3302
3303 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3304 &wan_attr_group);
3305 if (res)
3306 return res;
3307
3308 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3309 &tpacpi_wan_rfkill,
3310 RFKILL_TYPE_WWAN,
3311 "tpacpi_wwan_sw",
3312 tpacpi_wan_rfk_set,
3313 tpacpi_wan_rfk_get);
3314 if (res) {
3315 wan_exit();
3316 return res;
3317 }
3318
3319 return 0;
3320 }
3321
3322 /* procfs -------------------------------------------------------------- */
3323 static int wan_read(char *p)
3324 {
3325 int len = 0;
3326 int status = wan_get_radiosw();
3327
3328 if (!tp_features.wan)
3329 len += sprintf(p + len, "status:\t\tnot supported\n");
3330 else {
3331 len += sprintf(p + len, "status:\t\t%s\n",
3332 (status == RFKILL_STATE_UNBLOCKED) ?
3333 "enabled" : "disabled");
3334 len += sprintf(p + len, "commands:\tenable, disable\n");
3335 }
3336
3337 return len;
3338 }
3339
3340 static int wan_write(char *buf)
3341 {
3342 char *cmd;
3343
3344 if (!tp_features.wan)
3345 return -ENODEV;
3346
3347 while ((cmd = next_cmd(&buf))) {
3348 if (strlencmp(cmd, "enable") == 0) {
3349 wan_set_radiosw(1, 1);
3350 } else if (strlencmp(cmd, "disable") == 0) {
3351 wan_set_radiosw(0, 1);
3352 } else
3353 return -EINVAL;
3354 }
3355
3356 return 0;
3357 }
3358
3359 static struct ibm_struct wan_driver_data = {
3360 .name = "wan",
3361 .read = wan_read,
3362 .write = wan_write,
3363 .exit = wan_exit,
3364 .suspend = wan_suspend,
3365 .shutdown = wan_shutdown,
3366 };
3367
3368 /*************************************************************************
3369 * Video subdriver
3370 */
3371
3372 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3373
3374 enum video_access_mode {
3375 TPACPI_VIDEO_NONE = 0,
3376 TPACPI_VIDEO_570, /* 570 */
3377 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3378 TPACPI_VIDEO_NEW, /* all others */
3379 };
3380
3381 enum { /* video status flags, based on VIDEO_570 */
3382 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3383 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3384 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3385 };
3386
3387 enum { /* TPACPI_VIDEO_570 constants */
3388 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3389 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3390 * video_status_flags */
3391 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3392 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3393 };
3394
3395 static enum video_access_mode video_supported;
3396 static int video_orig_autosw;
3397
3398 static int video_autosw_get(void);
3399 static int video_autosw_set(int enable);
3400
3401 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3402
3403 static int __init video_init(struct ibm_init_struct *iibm)
3404 {
3405 int ivga;
3406
3407 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3408
3409 TPACPI_ACPIHANDLE_INIT(vid);
3410 TPACPI_ACPIHANDLE_INIT(vid2);
3411
3412 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3413 /* G41, assume IVGA doesn't change */
3414 vid_handle = vid2_handle;
3415
3416 if (!vid_handle)
3417 /* video switching not supported on R30, R31 */
3418 video_supported = TPACPI_VIDEO_NONE;
3419 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3420 /* 570 */
3421 video_supported = TPACPI_VIDEO_570;
3422 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3423 /* 600e/x, 770e, 770x */
3424 video_supported = TPACPI_VIDEO_770;
3425 else
3426 /* all others */
3427 video_supported = TPACPI_VIDEO_NEW;
3428
3429 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3430 str_supported(video_supported != TPACPI_VIDEO_NONE),
3431 video_supported);
3432
3433 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3434 }
3435
3436 static void video_exit(void)
3437 {
3438 dbg_printk(TPACPI_DBG_EXIT,
3439 "restoring original video autoswitch mode\n");
3440 if (video_autosw_set(video_orig_autosw))
3441 printk(TPACPI_ERR "error while trying to restore original "
3442 "video autoswitch mode\n");
3443 }
3444
3445 static int video_outputsw_get(void)
3446 {
3447 int status = 0;
3448 int i;
3449
3450 switch (video_supported) {
3451 case TPACPI_VIDEO_570:
3452 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3453 TP_ACPI_VIDEO_570_PHSCMD))
3454 return -EIO;
3455 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3456 break;
3457 case TPACPI_VIDEO_770:
3458 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3459 return -EIO;
3460 if (i)
3461 status |= TP_ACPI_VIDEO_S_LCD;
3462 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3463 return -EIO;
3464 if (i)
3465 status |= TP_ACPI_VIDEO_S_CRT;
3466 break;
3467 case TPACPI_VIDEO_NEW:
3468 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3469 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3470 return -EIO;
3471 if (i)
3472 status |= TP_ACPI_VIDEO_S_CRT;
3473
3474 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3475 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3476 return -EIO;
3477 if (i)
3478 status |= TP_ACPI_VIDEO_S_LCD;
3479 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3480 return -EIO;
3481 if (i)
3482 status |= TP_ACPI_VIDEO_S_DVI;
3483 break;
3484 default:
3485 return -ENOSYS;
3486 }
3487
3488 return status;
3489 }
3490
3491 static int video_outputsw_set(int status)
3492 {
3493 int autosw;
3494 int res = 0;
3495
3496 switch (video_supported) {
3497 case TPACPI_VIDEO_570:
3498 res = acpi_evalf(NULL, NULL,
3499 "\\_SB.PHS2", "vdd",
3500 TP_ACPI_VIDEO_570_PHS2CMD,
3501 status | TP_ACPI_VIDEO_570_PHS2SET);
3502 break;
3503 case TPACPI_VIDEO_770:
3504 autosw = video_autosw_get();
3505 if (autosw < 0)
3506 return autosw;
3507
3508 res = video_autosw_set(1);
3509 if (res)
3510 return res;
3511 res = acpi_evalf(vid_handle, NULL,
3512 "ASWT", "vdd", status * 0x100, 0);
3513 if (!autosw && video_autosw_set(autosw)) {
3514 printk(TPACPI_ERR
3515 "video auto-switch left enabled due to error\n");
3516 return -EIO;
3517 }
3518 break;
3519 case TPACPI_VIDEO_NEW:
3520 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3521 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3522 break;
3523 default:
3524 return -ENOSYS;
3525 }
3526
3527 return (res)? 0 : -EIO;
3528 }
3529
3530 static int video_autosw_get(void)
3531 {
3532 int autosw = 0;
3533
3534 switch (video_supported) {
3535 case TPACPI_VIDEO_570:
3536 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3537 return -EIO;
3538 break;
3539 case TPACPI_VIDEO_770:
3540 case TPACPI_VIDEO_NEW:
3541 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3542 return -EIO;
3543 break;
3544 default:
3545 return -ENOSYS;
3546 }
3547
3548 return autosw & 1;
3549 }
3550
3551 static int video_autosw_set(int enable)
3552 {
3553 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3554 return -EIO;
3555 return 0;
3556 }
3557
3558 static int video_outputsw_cycle(void)
3559 {
3560 int autosw = video_autosw_get();
3561 int res;
3562
3563 if (autosw < 0)
3564 return autosw;
3565
3566 switch (video_supported) {
3567 case TPACPI_VIDEO_570:
3568 res = video_autosw_set(1);
3569 if (res)
3570 return res;
3571 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3572 break;
3573 case TPACPI_VIDEO_770:
3574 case TPACPI_VIDEO_NEW:
3575 res = video_autosw_set(1);
3576 if (res)
3577 return res;
3578 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3579 break;
3580 default:
3581 return -ENOSYS;
3582 }
3583 if (!autosw && video_autosw_set(autosw)) {
3584 printk(TPACPI_ERR
3585 "video auto-switch left enabled due to error\n");
3586 return -EIO;
3587 }
3588
3589 return (res)? 0 : -EIO;
3590 }
3591
3592 static int video_expand_toggle(void)
3593 {
3594 switch (video_supported) {
3595 case TPACPI_VIDEO_570:
3596 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3597 0 : -EIO;
3598 case TPACPI_VIDEO_770:
3599 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3600 0 : -EIO;
3601 case TPACPI_VIDEO_NEW:
3602 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3603 0 : -EIO;
3604 default:
3605 return -ENOSYS;
3606 }
3607 /* not reached */
3608 }
3609
3610 static int video_read(char *p)
3611 {
3612 int status, autosw;
3613 int len = 0;
3614
3615 if (video_supported == TPACPI_VIDEO_NONE) {
3616 len += sprintf(p + len, "status:\t\tnot supported\n");
3617 return len;
3618 }
3619
3620 status = video_outputsw_get();
3621 if (status < 0)
3622 return status;
3623
3624 autosw = video_autosw_get();
3625 if (autosw < 0)
3626 return autosw;
3627
3628 len += sprintf(p + len, "status:\t\tsupported\n");
3629 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3630 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3631 if (video_supported == TPACPI_VIDEO_NEW)
3632 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3633 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3634 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3635 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3636 if (video_supported == TPACPI_VIDEO_NEW)
3637 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3638 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3639 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3640
3641 return len;
3642 }
3643
3644 static int video_write(char *buf)
3645 {
3646 char *cmd;
3647 int enable, disable, status;
3648 int res;
3649
3650 if (video_supported == TPACPI_VIDEO_NONE)
3651 return -ENODEV;
3652
3653 enable = 0;
3654 disable = 0;
3655
3656 while ((cmd = next_cmd(&buf))) {
3657 if (strlencmp(cmd, "lcd_enable") == 0) {
3658 enable |= TP_ACPI_VIDEO_S_LCD;
3659 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3660 disable |= TP_ACPI_VIDEO_S_LCD;
3661 } else if (strlencmp(cmd, "crt_enable") == 0) {
3662 enable |= TP_ACPI_VIDEO_S_CRT;
3663 } else if (strlencmp(cmd, "crt_disable") == 0) {
3664 disable |= TP_ACPI_VIDEO_S_CRT;
3665 } else if (video_supported == TPACPI_VIDEO_NEW &&
3666 strlencmp(cmd, "dvi_enable") == 0) {
3667 enable |= TP_ACPI_VIDEO_S_DVI;
3668 } else if (video_supported == TPACPI_VIDEO_NEW &&
3669 strlencmp(cmd, "dvi_disable") == 0) {
3670 disable |= TP_ACPI_VIDEO_S_DVI;
3671 } else if (strlencmp(cmd, "auto_enable") == 0) {
3672 res = video_autosw_set(1);
3673 if (res)
3674 return res;
3675 } else if (strlencmp(cmd, "auto_disable") == 0) {
3676 res = video_autosw_set(0);
3677 if (res)
3678 return res;
3679 } else if (strlencmp(cmd, "video_switch") == 0) {
3680 res = video_outputsw_cycle();
3681 if (res)
3682 return res;
3683 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3684 res = video_expand_toggle();
3685 if (res)
3686 return res;
3687 } else
3688 return -EINVAL;
3689 }
3690
3691 if (enable || disable) {
3692 status = video_outputsw_get();
3693 if (status < 0)
3694 return status;
3695 res = video_outputsw_set((status & ~disable) | enable);
3696 if (res)
3697 return res;
3698 }
3699
3700 return 0;
3701 }
3702
3703 static struct ibm_struct video_driver_data = {
3704 .name = "video",
3705 .read = video_read,
3706 .write = video_write,
3707 .exit = video_exit,
3708 };
3709
3710 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3711
3712 /*************************************************************************
3713 * Light (thinklight) subdriver
3714 */
3715
3716 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
3717 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
3718
3719 static int light_get_status(void)
3720 {
3721 int status = 0;
3722
3723 if (tp_features.light_status) {
3724 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3725 return -EIO;
3726 return (!!status);
3727 }
3728
3729 return -ENXIO;
3730 }
3731
3732 static int light_set_status(int status)
3733 {
3734 int rc;
3735
3736 if (tp_features.light) {
3737 if (cmos_handle) {
3738 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3739 (status)?
3740 TP_CMOS_THINKLIGHT_ON :
3741 TP_CMOS_THINKLIGHT_OFF);
3742 } else {
3743 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3744 (status)? 1 : 0);
3745 }
3746 return (rc)? 0 : -EIO;
3747 }
3748
3749 return -ENXIO;
3750 }
3751
3752 static void light_set_status_worker(struct work_struct *work)
3753 {
3754 struct tpacpi_led_classdev *data =
3755 container_of(work, struct tpacpi_led_classdev, work);
3756
3757 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3758 light_set_status((data->new_brightness != LED_OFF));
3759 }
3760
3761 static void light_sysfs_set(struct led_classdev *led_cdev,
3762 enum led_brightness brightness)
3763 {
3764 struct tpacpi_led_classdev *data =
3765 container_of(led_cdev,
3766 struct tpacpi_led_classdev,
3767 led_classdev);
3768 data->new_brightness = brightness;
3769 queue_work(tpacpi_wq, &data->work);
3770 }
3771
3772 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3773 {
3774 return (light_get_status() == 1)? LED_FULL : LED_OFF;
3775 }
3776
3777 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3778 .led_classdev = {
3779 .name = "tpacpi::thinklight",
3780 .brightness_set = &light_sysfs_set,
3781 .brightness_get = &light_sysfs_get,
3782 }
3783 };
3784
3785 static int __init light_init(struct ibm_init_struct *iibm)
3786 {
3787 int rc;
3788
3789 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3790
3791 TPACPI_ACPIHANDLE_INIT(ledb);
3792 TPACPI_ACPIHANDLE_INIT(lght);
3793 TPACPI_ACPIHANDLE_INIT(cmos);
3794 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3795
3796 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3797 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3798
3799 if (tp_features.light)
3800 /* light status not supported on
3801 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3802 tp_features.light_status =
3803 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3804
3805 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
3806 str_supported(tp_features.light),
3807 str_supported(tp_features.light_status));
3808
3809 if (!tp_features.light)
3810 return 1;
3811
3812 rc = led_classdev_register(&tpacpi_pdev->dev,
3813 &tpacpi_led_thinklight.led_classdev);
3814
3815 if (rc < 0) {
3816 tp_features.light = 0;
3817 tp_features.light_status = 0;
3818 } else {
3819 rc = 0;
3820 }
3821
3822 return rc;
3823 }
3824
3825 static void light_exit(void)
3826 {
3827 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3828 if (work_pending(&tpacpi_led_thinklight.work))
3829 flush_workqueue(tpacpi_wq);
3830 }
3831
3832 static int light_read(char *p)
3833 {
3834 int len = 0;
3835 int status;
3836
3837 if (!tp_features.light) {
3838 len += sprintf(p + len, "status:\t\tnot supported\n");
3839 } else if (!tp_features.light_status) {
3840 len += sprintf(p + len, "status:\t\tunknown\n");
3841 len += sprintf(p + len, "commands:\ton, off\n");
3842 } else {
3843 status = light_get_status();
3844 if (status < 0)
3845 return status;
3846 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3847 len += sprintf(p + len, "commands:\ton, off\n");
3848 }
3849
3850 return len;
3851 }
3852
3853 static int light_write(char *buf)
3854 {
3855 char *cmd;
3856 int newstatus = 0;
3857
3858 if (!tp_features.light)
3859 return -ENODEV;
3860
3861 while ((cmd = next_cmd(&buf))) {
3862 if (strlencmp(cmd, "on") == 0) {
3863 newstatus = 1;
3864 } else if (strlencmp(cmd, "off") == 0) {
3865 newstatus = 0;
3866 } else
3867 return -EINVAL;
3868 }
3869
3870 return light_set_status(newstatus);
3871 }
3872
3873 static struct ibm_struct light_driver_data = {
3874 .name = "light",
3875 .read = light_read,
3876 .write = light_write,
3877 .exit = light_exit,
3878 };
3879
3880 /*************************************************************************
3881 * Dock subdriver
3882 */
3883
3884 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3885
3886 static void dock_notify(struct ibm_struct *ibm, u32 event);
3887 static int dock_read(char *p);
3888 static int dock_write(char *buf);
3889
3890 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3891 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3892 "\\_SB.PCI0.PCI1.DOCK", /* all others */
3893 "\\_SB.PCI.ISA.SLCE", /* 570 */
3894 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3895
3896 /* don't list other alternatives as we install a notify handler on the 570 */
3897 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
3898
3899 static const struct acpi_device_id ibm_pci_device_ids[] = {
3900 {PCI_ROOT_HID_STRING, 0},
3901 {"", 0},
3902 };
3903
3904 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3905 {
3906 .notify = dock_notify,
3907 .handle = &dock_handle,
3908 .type = ACPI_SYSTEM_NOTIFY,
3909 },
3910 {
3911 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3912 * We just use it to get notifications of dock hotplug
3913 * in very old thinkpads */
3914 .hid = ibm_pci_device_ids,
3915 .notify = dock_notify,
3916 .handle = &pci_handle,
3917 .type = ACPI_SYSTEM_NOTIFY,
3918 },
3919 };
3920
3921 static struct ibm_struct dock_driver_data[2] = {
3922 {
3923 .name = "dock",
3924 .read = dock_read,
3925 .write = dock_write,
3926 .acpi = &ibm_dock_acpidriver[0],
3927 },
3928 {
3929 .name = "dock",
3930 .acpi = &ibm_dock_acpidriver[1],
3931 },
3932 };
3933
3934 #define dock_docked() (_sta(dock_handle) & 1)
3935
3936 static int __init dock_init(struct ibm_init_struct *iibm)
3937 {
3938 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3939
3940 TPACPI_ACPIHANDLE_INIT(dock);
3941
3942 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3943 str_supported(dock_handle != NULL));
3944
3945 return (dock_handle)? 0 : 1;
3946 }
3947
3948 static int __init dock_init2(struct ibm_init_struct *iibm)
3949 {
3950 int dock2_needed;
3951
3952 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3953
3954 if (dock_driver_data[0].flags.acpi_driver_registered &&
3955 dock_driver_data[0].flags.acpi_notify_installed) {
3956 TPACPI_ACPIHANDLE_INIT(pci);
3957 dock2_needed = (pci_handle != NULL);
3958 vdbg_printk(TPACPI_DBG_INIT,
3959 "dock PCI handler for the TP 570 is %s\n",
3960 str_supported(dock2_needed));
3961 } else {
3962 vdbg_printk(TPACPI_DBG_INIT,
3963 "dock subdriver part 2 not required\n");
3964 dock2_needed = 0;
3965 }
3966
3967 return (dock2_needed)? 0 : 1;
3968 }
3969
3970 static void dock_notify(struct ibm_struct *ibm, u32 event)
3971 {
3972 int docked = dock_docked();
3973 int pci = ibm->acpi->hid && ibm->acpi->device &&
3974 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3975 int data;
3976
3977 if (event == 1 && !pci) /* 570 */
3978 data = 1; /* button */
3979 else if (event == 1 && pci) /* 570 */
3980 data = 3; /* dock */
3981 else if (event == 3 && docked)
3982 data = 1; /* button */
3983 else if (event == 3 && !docked)
3984 data = 2; /* undock */
3985 else if (event == 0 && docked)
3986 data = 3; /* dock */
3987 else {
3988 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3989 event, _sta(dock_handle));
3990 data = 0; /* unknown */
3991 }
3992 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3993 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3994 dev_name(&ibm->acpi->device->dev),
3995 event, data);
3996 }
3997
3998 static int dock_read(char *p)
3999 {
4000 int len = 0;
4001 int docked = dock_docked();
4002
4003 if (!dock_handle)
4004 len += sprintf(p + len, "status:\t\tnot supported\n");
4005 else if (!docked)
4006 len += sprintf(p + len, "status:\t\tundocked\n");
4007 else {
4008 len += sprintf(p + len, "status:\t\tdocked\n");
4009 len += sprintf(p + len, "commands:\tdock, undock\n");
4010 }
4011
4012 return len;
4013 }
4014
4015 static int dock_write(char *buf)
4016 {
4017 char *cmd;
4018
4019 if (!dock_docked())
4020 return -ENODEV;
4021
4022 while ((cmd = next_cmd(&buf))) {
4023 if (strlencmp(cmd, "undock") == 0) {
4024 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4025 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4026 return -EIO;
4027 } else if (strlencmp(cmd, "dock") == 0) {
4028 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4029 return -EIO;
4030 } else
4031 return -EINVAL;
4032 }
4033
4034 return 0;
4035 }
4036
4037 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4038
4039 /*************************************************************************
4040 * Bay subdriver
4041 */
4042
4043 #ifdef CONFIG_THINKPAD_ACPI_BAY
4044
4045 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4046 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4047 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4048 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4049 ); /* A21e, R30, R31 */
4050 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4051 "_EJ0", /* all others */
4052 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4053 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4054 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4055 ); /* all others */
4056 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4057 "_EJ0", /* 770x */
4058 ); /* all others */
4059
4060 static int __init bay_init(struct ibm_init_struct *iibm)
4061 {
4062 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4063
4064 TPACPI_ACPIHANDLE_INIT(bay);
4065 if (bay_handle)
4066 TPACPI_ACPIHANDLE_INIT(bay_ej);
4067 TPACPI_ACPIHANDLE_INIT(bay2);
4068 if (bay2_handle)
4069 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4070
4071 tp_features.bay_status = bay_handle &&
4072 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4073 tp_features.bay_status2 = bay2_handle &&
4074 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4075
4076 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4077 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4078 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4079 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4080
4081 vdbg_printk(TPACPI_DBG_INIT,
4082 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4083 str_supported(tp_features.bay_status),
4084 str_supported(tp_features.bay_eject),
4085 str_supported(tp_features.bay_status2),
4086 str_supported(tp_features.bay_eject2));
4087
4088 return (tp_features.bay_status || tp_features.bay_eject ||
4089 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4090 }
4091
4092 static void bay_notify(struct ibm_struct *ibm, u32 event)
4093 {
4094 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4095 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4096 dev_name(&ibm->acpi->device->dev),
4097 event, 0);
4098 }
4099
4100 #define bay_occupied(b) (_sta(b##_handle) & 1)
4101
4102 static int bay_read(char *p)
4103 {
4104 int len = 0;
4105 int occupied = bay_occupied(bay);
4106 int occupied2 = bay_occupied(bay2);
4107 int eject, eject2;
4108
4109 len += sprintf(p + len, "status:\t\t%s\n",
4110 tp_features.bay_status ?
4111 (occupied ? "occupied" : "unoccupied") :
4112 "not supported");
4113 if (tp_features.bay_status2)
4114 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4115 "occupied" : "unoccupied");
4116
4117 eject = tp_features.bay_eject && occupied;
4118 eject2 = tp_features.bay_eject2 && occupied2;
4119
4120 if (eject && eject2)
4121 len += sprintf(p + len, "commands:\teject, eject2\n");
4122 else if (eject)
4123 len += sprintf(p + len, "commands:\teject\n");
4124 else if (eject2)
4125 len += sprintf(p + len, "commands:\teject2\n");
4126
4127 return len;
4128 }
4129
4130 static int bay_write(char *buf)
4131 {
4132 char *cmd;
4133
4134 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4135 return -ENODEV;
4136
4137 while ((cmd = next_cmd(&buf))) {
4138 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4139 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4140 return -EIO;
4141 } else if (tp_features.bay_eject2 &&
4142 strlencmp(cmd, "eject2") == 0) {
4143 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4144 return -EIO;
4145 } else
4146 return -EINVAL;
4147 }
4148
4149 return 0;
4150 }
4151
4152 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4153 .notify = bay_notify,
4154 .handle = &bay_handle,
4155 .type = ACPI_SYSTEM_NOTIFY,
4156 };
4157
4158 static struct ibm_struct bay_driver_data = {
4159 .name = "bay",
4160 .read = bay_read,
4161 .write = bay_write,
4162 .acpi = &ibm_bay_acpidriver,
4163 };
4164
4165 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4166
4167 /*************************************************************************
4168 * CMOS subdriver
4169 */
4170
4171 /* sysfs cmos_command -------------------------------------------------- */
4172 static ssize_t cmos_command_store(struct device *dev,
4173 struct device_attribute *attr,
4174 const char *buf, size_t count)
4175 {
4176 unsigned long cmos_cmd;
4177 int res;
4178
4179 if (parse_strtoul(buf, 21, &cmos_cmd))
4180 return -EINVAL;
4181
4182 res = issue_thinkpad_cmos_command(cmos_cmd);
4183 return (res)? res : count;
4184 }
4185
4186 static struct device_attribute dev_attr_cmos_command =
4187 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4188
4189 /* --------------------------------------------------------------------- */
4190
4191 static int __init cmos_init(struct ibm_init_struct *iibm)
4192 {
4193 int res;
4194
4195 vdbg_printk(TPACPI_DBG_INIT,
4196 "initializing cmos commands subdriver\n");
4197
4198 TPACPI_ACPIHANDLE_INIT(cmos);
4199
4200 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4201 str_supported(cmos_handle != NULL));
4202
4203 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4204 if (res)
4205 return res;
4206
4207 return (cmos_handle)? 0 : 1;
4208 }
4209
4210 static void cmos_exit(void)
4211 {
4212 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4213 }
4214
4215 static int cmos_read(char *p)
4216 {
4217 int len = 0;
4218
4219 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4220 R30, R31, T20-22, X20-21 */
4221 if (!cmos_handle)
4222 len += sprintf(p + len, "status:\t\tnot supported\n");
4223 else {
4224 len += sprintf(p + len, "status:\t\tsupported\n");
4225 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4226 }
4227
4228 return len;
4229 }
4230
4231 static int cmos_write(char *buf)
4232 {
4233 char *cmd;
4234 int cmos_cmd, res;
4235
4236 while ((cmd = next_cmd(&buf))) {
4237 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4238 cmos_cmd >= 0 && cmos_cmd <= 21) {
4239 /* cmos_cmd set */
4240 } else
4241 return -EINVAL;
4242
4243 res = issue_thinkpad_cmos_command(cmos_cmd);
4244 if (res)
4245 return res;
4246 }
4247
4248 return 0;
4249 }
4250
4251 static struct ibm_struct cmos_driver_data = {
4252 .name = "cmos",
4253 .read = cmos_read,
4254 .write = cmos_write,
4255 .exit = cmos_exit,
4256 };
4257
4258 /*************************************************************************
4259 * LED subdriver
4260 */
4261
4262 enum led_access_mode {
4263 TPACPI_LED_NONE = 0,
4264 TPACPI_LED_570, /* 570 */
4265 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4266 TPACPI_LED_NEW, /* all others */
4267 };
4268
4269 enum { /* For TPACPI_LED_OLD */
4270 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4271 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4272 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4273 };
4274
4275 enum led_status_t {
4276 TPACPI_LED_OFF = 0,
4277 TPACPI_LED_ON,
4278 TPACPI_LED_BLINK,
4279 };
4280
4281 static enum led_access_mode led_supported;
4282
4283 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4284 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4285 /* T20-22, X20-21 */
4286 "LED", /* all others */
4287 ); /* R30, R31 */
4288
4289 #define TPACPI_LED_NUMLEDS 8
4290 static struct tpacpi_led_classdev *tpacpi_leds;
4291 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4292 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4293 /* there's a limit of 19 chars + NULL before 2.6.26 */
4294 "tpacpi::power",
4295 "tpacpi:orange:batt",
4296 "tpacpi:green:batt",
4297 "tpacpi::dock_active",
4298 "tpacpi::bay_active",
4299 "tpacpi::dock_batt",
4300 "tpacpi::unknown_led",
4301 "tpacpi::standby",
4302 };
4303
4304 static int led_get_status(const unsigned int led)
4305 {
4306 int status;
4307 enum led_status_t led_s;
4308
4309 switch (led_supported) {
4310 case TPACPI_LED_570:
4311 if (!acpi_evalf(ec_handle,
4312 &status, "GLED", "dd", 1 << led))
4313 return -EIO;
4314 led_s = (status == 0)?
4315 TPACPI_LED_OFF :
4316 ((status == 1)?
4317 TPACPI_LED_ON :
4318 TPACPI_LED_BLINK);
4319 tpacpi_led_state_cache[led] = led_s;
4320 return led_s;
4321 default:
4322 return -ENXIO;
4323 }
4324
4325 /* not reached */
4326 }
4327
4328 static int led_set_status(const unsigned int led,
4329 const enum led_status_t ledstatus)
4330 {
4331 /* off, on, blink. Index is led_status_t */
4332 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4333 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4334
4335 int rc = 0;
4336
4337 switch (led_supported) {
4338 case TPACPI_LED_570:
4339 /* 570 */
4340 if (led > 7)
4341 return -EINVAL;
4342 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4343 (1 << led), led_sled_arg1[ledstatus]))
4344 rc = -EIO;
4345 break;
4346 case TPACPI_LED_OLD:
4347 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4348 if (led > 7)
4349 return -EINVAL;
4350 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4351 if (rc >= 0)
4352 rc = ec_write(TPACPI_LED_EC_HLBL,
4353 (ledstatus == TPACPI_LED_BLINK) << led);
4354 if (rc >= 0)
4355 rc = ec_write(TPACPI_LED_EC_HLCL,
4356 (ledstatus != TPACPI_LED_OFF) << led);
4357 break;
4358 case TPACPI_LED_NEW:
4359 /* all others */
4360 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4361 led, led_led_arg1[ledstatus]))
4362 rc = -EIO;
4363 break;
4364 default:
4365 rc = -ENXIO;
4366 }
4367
4368 if (!rc)
4369 tpacpi_led_state_cache[led] = ledstatus;
4370
4371 return rc;
4372 }
4373
4374 static void led_sysfs_set_status(unsigned int led,
4375 enum led_brightness brightness)
4376 {
4377 led_set_status(led,
4378 (brightness == LED_OFF) ?
4379 TPACPI_LED_OFF :
4380 (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4381 TPACPI_LED_BLINK : TPACPI_LED_ON);
4382 }
4383
4384 static void led_set_status_worker(struct work_struct *work)
4385 {
4386 struct tpacpi_led_classdev *data =
4387 container_of(work, struct tpacpi_led_classdev, work);
4388
4389 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4390 led_sysfs_set_status(data->led, data->new_brightness);
4391 }
4392
4393 static void led_sysfs_set(struct led_classdev *led_cdev,
4394 enum led_brightness brightness)
4395 {
4396 struct tpacpi_led_classdev *data = container_of(led_cdev,
4397 struct tpacpi_led_classdev, led_classdev);
4398
4399 data->new_brightness = brightness;
4400 queue_work(tpacpi_wq, &data->work);
4401 }
4402
4403 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4404 unsigned long *delay_on, unsigned long *delay_off)
4405 {
4406 struct tpacpi_led_classdev *data = container_of(led_cdev,
4407 struct tpacpi_led_classdev, led_classdev);
4408
4409 /* Can we choose the flash rate? */
4410 if (*delay_on == 0 && *delay_off == 0) {
4411 /* yes. set them to the hardware blink rate (1 Hz) */
4412 *delay_on = 500; /* ms */
4413 *delay_off = 500; /* ms */
4414 } else if ((*delay_on != 500) || (*delay_off != 500))
4415 return -EINVAL;
4416
4417 data->new_brightness = TPACPI_LED_BLINK;
4418 queue_work(tpacpi_wq, &data->work);
4419
4420 return 0;
4421 }
4422
4423 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4424 {
4425 int rc;
4426
4427 struct tpacpi_led_classdev *data = container_of(led_cdev,
4428 struct tpacpi_led_classdev, led_classdev);
4429
4430 rc = led_get_status(data->led);
4431
4432 if (rc == TPACPI_LED_OFF || rc < 0)
4433 rc = LED_OFF; /* no error handling in led class :( */
4434 else
4435 rc = LED_FULL;
4436
4437 return rc;
4438 }
4439
4440 static void led_exit(void)
4441 {
4442 unsigned int i;
4443
4444 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4445 if (tpacpi_leds[i].led_classdev.name)
4446 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4447 }
4448
4449 kfree(tpacpi_leds);
4450 }
4451
4452 static int __init led_init(struct ibm_init_struct *iibm)
4453 {
4454 unsigned int i;
4455 int rc;
4456
4457 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4458
4459 TPACPI_ACPIHANDLE_INIT(led);
4460
4461 if (!led_handle)
4462 /* led not supported on R30, R31 */
4463 led_supported = TPACPI_LED_NONE;
4464 else if (strlencmp(led_path, "SLED") == 0)
4465 /* 570 */
4466 led_supported = TPACPI_LED_570;
4467 else if (strlencmp(led_path, "SYSL") == 0)
4468 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4469 led_supported = TPACPI_LED_OLD;
4470 else
4471 /* all others */
4472 led_supported = TPACPI_LED_NEW;
4473
4474 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4475 str_supported(led_supported), led_supported);
4476
4477 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4478 GFP_KERNEL);
4479 if (!tpacpi_leds) {
4480 printk(TPACPI_ERR "Out of memory for LED data\n");
4481 return -ENOMEM;
4482 }
4483
4484 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4485 tpacpi_leds[i].led = i;
4486
4487 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4488 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4489 if (led_supported == TPACPI_LED_570)
4490 tpacpi_leds[i].led_classdev.brightness_get =
4491 &led_sysfs_get;
4492
4493 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4494
4495 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4496
4497 rc = led_classdev_register(&tpacpi_pdev->dev,
4498 &tpacpi_leds[i].led_classdev);
4499 if (rc < 0) {
4500 tpacpi_leds[i].led_classdev.name = NULL;
4501 led_exit();
4502 return rc;
4503 }
4504 }
4505
4506 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4507 }
4508
4509 #define str_led_status(s) \
4510 ((s) == TPACPI_LED_OFF ? "off" : \
4511 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4512
4513 static int led_read(char *p)
4514 {
4515 int len = 0;
4516
4517 if (!led_supported) {
4518 len += sprintf(p + len, "status:\t\tnot supported\n");
4519 return len;
4520 }
4521 len += sprintf(p + len, "status:\t\tsupported\n");
4522
4523 if (led_supported == TPACPI_LED_570) {
4524 /* 570 */
4525 int i, status;
4526 for (i = 0; i < 8; i++) {
4527 status = led_get_status(i);
4528 if (status < 0)
4529 return -EIO;
4530 len += sprintf(p + len, "%d:\t\t%s\n",
4531 i, str_led_status(status));
4532 }
4533 }
4534
4535 len += sprintf(p + len, "commands:\t"
4536 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4537
4538 return len;
4539 }
4540
4541 static int led_write(char *buf)
4542 {
4543 char *cmd;
4544 int led, rc;
4545 enum led_status_t s;
4546
4547 if (!led_supported)
4548 return -ENODEV;
4549
4550 while ((cmd = next_cmd(&buf))) {
4551 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4552 return -EINVAL;
4553
4554 if (strstr(cmd, "off")) {
4555 s = TPACPI_LED_OFF;
4556 } else if (strstr(cmd, "on")) {
4557 s = TPACPI_LED_ON;
4558 } else if (strstr(cmd, "blink")) {
4559 s = TPACPI_LED_BLINK;
4560 } else {
4561 return -EINVAL;
4562 }
4563
4564 rc = led_set_status(led, s);
4565 if (rc < 0)
4566 return rc;
4567 }
4568
4569 return 0;
4570 }
4571
4572 static struct ibm_struct led_driver_data = {
4573 .name = "led",
4574 .read = led_read,
4575 .write = led_write,
4576 .exit = led_exit,
4577 };
4578
4579 /*************************************************************************
4580 * Beep subdriver
4581 */
4582
4583 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
4584
4585 static int __init beep_init(struct ibm_init_struct *iibm)
4586 {
4587 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4588
4589 TPACPI_ACPIHANDLE_INIT(beep);
4590
4591 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4592 str_supported(beep_handle != NULL));
4593
4594 return (beep_handle)? 0 : 1;
4595 }
4596
4597 static int beep_read(char *p)
4598 {
4599 int len = 0;
4600
4601 if (!beep_handle)
4602 len += sprintf(p + len, "status:\t\tnot supported\n");
4603 else {
4604 len += sprintf(p + len, "status:\t\tsupported\n");
4605 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4606 }
4607
4608 return len;
4609 }
4610
4611 static int beep_write(char *buf)
4612 {
4613 char *cmd;
4614 int beep_cmd;
4615
4616 if (!beep_handle)
4617 return -ENODEV;
4618
4619 while ((cmd = next_cmd(&buf))) {
4620 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4621 beep_cmd >= 0 && beep_cmd <= 17) {
4622 /* beep_cmd set */
4623 } else
4624 return -EINVAL;
4625 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4626 return -EIO;
4627 }
4628
4629 return 0;
4630 }
4631
4632 static struct ibm_struct beep_driver_data = {
4633 .name = "beep",
4634 .read = beep_read,
4635 .write = beep_write,
4636 };
4637
4638 /*************************************************************************
4639 * Thermal subdriver
4640 */
4641
4642 enum thermal_access_mode {
4643 TPACPI_THERMAL_NONE = 0, /* No thermal support */
4644 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
4645 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
4646 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
4647 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
4648 };
4649
4650 enum { /* TPACPI_THERMAL_TPEC_* */
4651 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
4652 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
4653 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
4654 };
4655
4656 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
4657 struct ibm_thermal_sensors_struct {
4658 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4659 };
4660
4661 static enum thermal_access_mode thermal_read_mode;
4662
4663 /* idx is zero-based */
4664 static int thermal_get_sensor(int idx, s32 *value)
4665 {
4666 int t;
4667 s8 tmp;
4668 char tmpi[5];
4669
4670 t = TP_EC_THERMAL_TMP0;
4671
4672 switch (thermal_read_mode) {
4673 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4674 case TPACPI_THERMAL_TPEC_16:
4675 if (idx >= 8 && idx <= 15) {
4676 t = TP_EC_THERMAL_TMP8;
4677 idx -= 8;
4678 }
4679 /* fallthrough */
4680 #endif
4681 case TPACPI_THERMAL_TPEC_8:
4682 if (idx <= 7) {
4683 if (!acpi_ec_read(t + idx, &tmp))
4684 return -EIO;
4685 *value = tmp * 1000;
4686 return 0;
4687 }
4688 break;
4689
4690 case TPACPI_THERMAL_ACPI_UPDT:
4691 if (idx <= 7) {
4692 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4693 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4694 return -EIO;
4695 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4696 return -EIO;
4697 *value = (t - 2732) * 100;
4698 return 0;
4699 }
4700 break;
4701
4702 case TPACPI_THERMAL_ACPI_TMP07:
4703 if (idx <= 7) {
4704 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4705 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4706 return -EIO;
4707 if (t > 127 || t < -127)
4708 t = TP_EC_THERMAL_TMP_NA;
4709 *value = t * 1000;
4710 return 0;
4711 }
4712 break;
4713
4714 case TPACPI_THERMAL_NONE:
4715 default:
4716 return -ENOSYS;
4717 }
4718
4719 return -EINVAL;
4720 }
4721
4722 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4723 {
4724 int res, i;
4725 int n;
4726
4727 n = 8;
4728 i = 0;
4729
4730 if (!s)
4731 return -EINVAL;
4732
4733 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4734 n = 16;
4735
4736 for (i = 0 ; i < n; i++) {
4737 res = thermal_get_sensor(i, &s->temp[i]);
4738 if (res)
4739 return res;
4740 }
4741
4742 return n;
4743 }
4744
4745 /* sysfs temp##_input -------------------------------------------------- */
4746
4747 static ssize_t thermal_temp_input_show(struct device *dev,
4748 struct device_attribute *attr,
4749 char *buf)
4750 {
4751 struct sensor_device_attribute *sensor_attr =
4752 to_sensor_dev_attr(attr);
4753 int idx = sensor_attr->index;
4754 s32 value;
4755 int res;
4756
4757 res = thermal_get_sensor(idx, &value);
4758 if (res)
4759 return res;
4760 if (value == TP_EC_THERMAL_TMP_NA * 1000)
4761 return -ENXIO;
4762
4763 return snprintf(buf, PAGE_SIZE, "%d\n", value);
4764 }
4765
4766 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4767 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4768 thermal_temp_input_show, NULL, _idxB)
4769
4770 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4771 THERMAL_SENSOR_ATTR_TEMP(1, 0),
4772 THERMAL_SENSOR_ATTR_TEMP(2, 1),
4773 THERMAL_SENSOR_ATTR_TEMP(3, 2),
4774 THERMAL_SENSOR_ATTR_TEMP(4, 3),
4775 THERMAL_SENSOR_ATTR_TEMP(5, 4),
4776 THERMAL_SENSOR_ATTR_TEMP(6, 5),
4777 THERMAL_SENSOR_ATTR_TEMP(7, 6),
4778 THERMAL_SENSOR_ATTR_TEMP(8, 7),
4779 THERMAL_SENSOR_ATTR_TEMP(9, 8),
4780 THERMAL_SENSOR_ATTR_TEMP(10, 9),
4781 THERMAL_SENSOR_ATTR_TEMP(11, 10),
4782 THERMAL_SENSOR_ATTR_TEMP(12, 11),
4783 THERMAL_SENSOR_ATTR_TEMP(13, 12),
4784 THERMAL_SENSOR_ATTR_TEMP(14, 13),
4785 THERMAL_SENSOR_ATTR_TEMP(15, 14),
4786 THERMAL_SENSOR_ATTR_TEMP(16, 15),
4787 };
4788
4789 #define THERMAL_ATTRS(X) \
4790 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4791
4792 static struct attribute *thermal_temp_input_attr[] = {
4793 THERMAL_ATTRS(8),
4794 THERMAL_ATTRS(9),
4795 THERMAL_ATTRS(10),
4796 THERMAL_ATTRS(11),
4797 THERMAL_ATTRS(12),
4798 THERMAL_ATTRS(13),
4799 THERMAL_ATTRS(14),
4800 THERMAL_ATTRS(15),
4801 THERMAL_ATTRS(0),
4802 THERMAL_ATTRS(1),
4803 THERMAL_ATTRS(2),
4804 THERMAL_ATTRS(3),
4805 THERMAL_ATTRS(4),
4806 THERMAL_ATTRS(5),
4807 THERMAL_ATTRS(6),
4808 THERMAL_ATTRS(7),
4809 NULL
4810 };
4811
4812 static const struct attribute_group thermal_temp_input16_group = {
4813 .attrs = thermal_temp_input_attr
4814 };
4815
4816 static const struct attribute_group thermal_temp_input8_group = {
4817 .attrs = &thermal_temp_input_attr[8]
4818 };
4819
4820 #undef THERMAL_SENSOR_ATTR_TEMP
4821 #undef THERMAL_ATTRS
4822
4823 /* --------------------------------------------------------------------- */
4824
4825 static int __init thermal_init(struct ibm_init_struct *iibm)
4826 {
4827 u8 t, ta1, ta2;
4828 int i;
4829 int acpi_tmp7;
4830 int res;
4831
4832 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4833
4834 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4835
4836 if (thinkpad_id.ec_model) {
4837 /*
4838 * Direct EC access mode: sensors at registers
4839 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
4840 * non-implemented, thermal sensors return 0x80 when
4841 * not available
4842 */
4843
4844 ta1 = ta2 = 0;
4845 for (i = 0; i < 8; i++) {
4846 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4847 ta1 |= t;
4848 } else {
4849 ta1 = 0;
4850 break;
4851 }
4852 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4853 ta2 |= t;
4854 } else {
4855 ta1 = 0;
4856 break;
4857 }
4858 }
4859 if (ta1 == 0) {
4860 /* This is sheer paranoia, but we handle it anyway */
4861 if (acpi_tmp7) {
4862 printk(TPACPI_ERR
4863 "ThinkPad ACPI EC access misbehaving, "
4864 "falling back to ACPI TMPx access "
4865 "mode\n");
4866 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4867 } else {
4868 printk(TPACPI_ERR
4869 "ThinkPad ACPI EC access misbehaving, "
4870 "disabling thermal sensors access\n");
4871 thermal_read_mode = TPACPI_THERMAL_NONE;
4872 }
4873 } else {
4874 thermal_read_mode =
4875 (ta2 != 0) ?
4876 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4877 }
4878 } else if (acpi_tmp7) {
4879 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4880 /* 600e/x, 770e, 770x */
4881 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4882 } else {
4883 /* Standard ACPI TMPx access, max 8 sensors */
4884 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4885 }
4886 } else {
4887 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4888 thermal_read_mode = TPACPI_THERMAL_NONE;
4889 }
4890
4891 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4892 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4893 thermal_read_mode);
4894
4895 switch (thermal_read_mode) {
4896 case TPACPI_THERMAL_TPEC_16:
4897 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4898 &thermal_temp_input16_group);
4899 if (res)
4900 return res;
4901 break;
4902 case TPACPI_THERMAL_TPEC_8:
4903 case TPACPI_THERMAL_ACPI_TMP07:
4904 case TPACPI_THERMAL_ACPI_UPDT:
4905 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4906 &thermal_temp_input8_group);
4907 if (res)
4908 return res;
4909 break;
4910 case TPACPI_THERMAL_NONE:
4911 default:
4912 return 1;
4913 }
4914
4915 return 0;
4916 }
4917
4918 static void thermal_exit(void)
4919 {
4920 switch (thermal_read_mode) {
4921 case TPACPI_THERMAL_TPEC_16:
4922 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4923 &thermal_temp_input16_group);
4924 break;
4925 case TPACPI_THERMAL_TPEC_8:
4926 case TPACPI_THERMAL_ACPI_TMP07:
4927 case TPACPI_THERMAL_ACPI_UPDT:
4928 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4929 &thermal_temp_input16_group);
4930 break;
4931 case TPACPI_THERMAL_NONE:
4932 default:
4933 break;
4934 }
4935 }
4936
4937 static int thermal_read(char *p)
4938 {
4939 int len = 0;
4940 int n, i;
4941 struct ibm_thermal_sensors_struct t;
4942
4943 n = thermal_get_sensors(&t);
4944 if (unlikely(n < 0))
4945 return n;
4946
4947 len += sprintf(p + len, "temperatures:\t");
4948
4949 if (n > 0) {
4950 for (i = 0; i < (n - 1); i++)
4951 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4952 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4953 } else
4954 len += sprintf(p + len, "not supported\n");
4955
4956 return len;
4957 }
4958
4959 static struct ibm_struct thermal_driver_data = {
4960 .name = "thermal",
4961 .read = thermal_read,
4962 .exit = thermal_exit,
4963 };
4964
4965 /*************************************************************************
4966 * EC Dump subdriver
4967 */
4968
4969 static u8 ecdump_regs[256];
4970
4971 static int ecdump_read(char *p)
4972 {
4973 int len = 0;
4974 int i, j;
4975 u8 v;
4976
4977 len += sprintf(p + len, "EC "
4978 " +00 +01 +02 +03 +04 +05 +06 +07"
4979 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4980 for (i = 0; i < 256; i += 16) {
4981 len += sprintf(p + len, "EC 0x%02x:", i);
4982 for (j = 0; j < 16; j++) {
4983 if (!acpi_ec_read(i + j, &v))
4984 break;
4985 if (v != ecdump_regs[i + j])
4986 len += sprintf(p + len, " *%02x", v);
4987 else
4988 len += sprintf(p + len, " %02x", v);
4989 ecdump_regs[i + j] = v;
4990 }
4991 len += sprintf(p + len, "\n");
4992 if (j != 16)
4993 break;
4994 }
4995
4996 /* These are way too dangerous to advertise openly... */
4997 #if 0
4998 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4999 " (<offset> is 00-ff, <value> is 00-ff)\n");
5000 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5001 " (<offset> is 00-ff, <value> is 0-255)\n");
5002 #endif
5003 return len;
5004 }
5005
5006 static int ecdump_write(char *buf)
5007 {
5008 char *cmd;
5009 int i, v;
5010
5011 while ((cmd = next_cmd(&buf))) {
5012 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5013 /* i and v set */
5014 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5015 /* i and v set */
5016 } else
5017 return -EINVAL;
5018 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5019 if (!acpi_ec_write(i, v))
5020 return -EIO;
5021 } else
5022 return -EINVAL;
5023 }
5024
5025 return 0;
5026 }
5027
5028 static struct ibm_struct ecdump_driver_data = {
5029 .name = "ecdump",
5030 .read = ecdump_read,
5031 .write = ecdump_write,
5032 .flags.experimental = 1,
5033 };
5034
5035 /*************************************************************************
5036 * Backlight/brightness subdriver
5037 */
5038
5039 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5040
5041 enum {
5042 TP_EC_BACKLIGHT = 0x31,
5043
5044 /* TP_EC_BACKLIGHT bitmasks */
5045 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5046 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5047 TP_EC_BACKLIGHT_MAPSW = 0x20,
5048 };
5049
5050 static struct backlight_device *ibm_backlight_device;
5051 static int brightness_mode;
5052 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5053
5054 static struct mutex brightness_mutex;
5055
5056 /*
5057 * ThinkPads can read brightness from two places: EC 0x31, or
5058 * CMOS NVRAM byte 0x5E, bits 0-3.
5059 *
5060 * EC 0x31 has the following layout
5061 * Bit 7: unknown function
5062 * Bit 6: unknown function
5063 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5064 * Bit 4: must be set to zero to avoid problems
5065 * Bit 3-0: backlight brightness level
5066 *
5067 * brightness_get_raw returns status data in the EC 0x31 layout
5068 */
5069 static int brightness_get_raw(int *status)
5070 {
5071 u8 lec = 0, lcmos = 0, level = 0;
5072
5073 if (brightness_mode & 1) {
5074 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5075 return -EIO;
5076 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5077 };
5078 if (brightness_mode & 2) {
5079 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5080 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5081 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5082 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5083 level = lcmos;
5084 }
5085
5086 if (brightness_mode == 3) {
5087 *status = lec; /* Prefer EC, CMOS is just a backing store */
5088 lec &= TP_EC_BACKLIGHT_LVLMSK;
5089 if (lec == lcmos)
5090 tp_warned.bright_cmos_ec_unsync = 0;
5091 else {
5092 if (!tp_warned.bright_cmos_ec_unsync) {
5093 printk(TPACPI_ERR
5094 "CMOS NVRAM (%u) and EC (%u) do not "
5095 "agree on display brightness level\n",
5096 (unsigned int) lcmos,
5097 (unsigned int) lec);
5098 tp_warned.bright_cmos_ec_unsync = 1;
5099 }
5100 return -EIO;
5101 }
5102 } else {
5103 *status = level;
5104 }
5105
5106 return 0;
5107 }
5108
5109 /* May return EINTR which can always be mapped to ERESTARTSYS */
5110 static int brightness_set(int value)
5111 {
5112 int cmos_cmd, inc, i, res;
5113 int current_value;
5114 int command_bits;
5115
5116 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5117 value < 0)
5118 return -EINVAL;
5119
5120 res = mutex_lock_interruptible(&brightness_mutex);
5121 if (res < 0)
5122 return res;
5123
5124 res = brightness_get_raw(&current_value);
5125 if (res < 0)
5126 goto errout;
5127
5128 command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5129 current_value &= TP_EC_BACKLIGHT_LVLMSK;
5130
5131 cmos_cmd = value > current_value ?
5132 TP_CMOS_BRIGHTNESS_UP :
5133 TP_CMOS_BRIGHTNESS_DOWN;
5134 inc = (value > current_value)? 1 : -1;
5135
5136 res = 0;
5137 for (i = current_value; i != value; i += inc) {
5138 if ((brightness_mode & 2) &&
5139 issue_thinkpad_cmos_command(cmos_cmd)) {
5140 res = -EIO;
5141 goto errout;
5142 }
5143 if ((brightness_mode & 1) &&
5144 !acpi_ec_write(TP_EC_BACKLIGHT,
5145 (i + inc) | command_bits)) {
5146 res = -EIO;
5147 goto errout;;
5148 }
5149 }
5150
5151 errout:
5152 mutex_unlock(&brightness_mutex);
5153 return res;
5154 }
5155
5156 /* sysfs backlight class ----------------------------------------------- */
5157
5158 static int brightness_update_status(struct backlight_device *bd)
5159 {
5160 /* it is the backlight class's job (caller) to handle
5161 * EINTR and other errors properly */
5162 return brightness_set(
5163 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5164 bd->props.power == FB_BLANK_UNBLANK) ?
5165 bd->props.brightness : 0);
5166 }
5167
5168 static int brightness_get(struct backlight_device *bd)
5169 {
5170 int status, res;
5171
5172 res = brightness_get_raw(&status);
5173 if (res < 0)
5174 return 0; /* FIXME: teach backlight about error handling */
5175
5176 return status & TP_EC_BACKLIGHT_LVLMSK;
5177 }
5178
5179 static struct backlight_ops ibm_backlight_data = {
5180 .get_brightness = brightness_get,
5181 .update_status = brightness_update_status,
5182 };
5183
5184 /* --------------------------------------------------------------------- */
5185
5186 static int __init brightness_init(struct ibm_init_struct *iibm)
5187 {
5188 int b;
5189
5190 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5191
5192 mutex_init(&brightness_mutex);
5193
5194 /*
5195 * We always attempt to detect acpi support, so as to switch
5196 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5197 * going to publish a backlight interface
5198 */
5199 b = tpacpi_check_std_acpi_brightness_support();
5200 if (b > 0) {
5201
5202 if (acpi_video_backlight_support()) {
5203 if (brightness_enable > 1) {
5204 printk(TPACPI_NOTICE
5205 "Standard ACPI backlight interface "
5206 "available, not loading native one.\n");
5207 return 1;
5208 } else if (brightness_enable == 1) {
5209 printk(TPACPI_NOTICE
5210 "Backlight control force enabled, even if standard "
5211 "ACPI backlight interface is available\n");
5212 }
5213 } else {
5214 if (brightness_enable > 1) {
5215 printk(TPACPI_NOTICE
5216 "Standard ACPI backlight interface not "
5217 "available, thinkpad_acpi native "
5218 "brightness control enabled\n");
5219 }
5220 }
5221 }
5222
5223 if (!brightness_enable) {
5224 dbg_printk(TPACPI_DBG_INIT,
5225 "brightness support disabled by "
5226 "module parameter\n");
5227 return 1;
5228 }
5229
5230 if (b > 16) {
5231 printk(TPACPI_ERR
5232 "Unsupported brightness interface, "
5233 "please contact %s\n", TPACPI_MAIL);
5234 return 1;
5235 }
5236 if (b == 16)
5237 tp_features.bright_16levels = 1;
5238
5239 if (!brightness_mode) {
5240 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5241 brightness_mode = 2;
5242 else
5243 brightness_mode = 3;
5244
5245 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5246 brightness_mode);
5247 }
5248
5249 if (brightness_mode > 3)
5250 return -EINVAL;
5251
5252 if (brightness_get_raw(&b) < 0)
5253 return 1;
5254
5255 if (tp_features.bright_16levels)
5256 printk(TPACPI_INFO
5257 "detected a 16-level brightness capable ThinkPad\n");
5258
5259 ibm_backlight_device = backlight_device_register(
5260 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5261 &ibm_backlight_data);
5262 if (IS_ERR(ibm_backlight_device)) {
5263 printk(TPACPI_ERR "Could not register backlight device\n");
5264 return PTR_ERR(ibm_backlight_device);
5265 }
5266 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5267
5268 ibm_backlight_device->props.max_brightness =
5269 (tp_features.bright_16levels)? 15 : 7;
5270 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5271 backlight_update_status(ibm_backlight_device);
5272
5273 return 0;
5274 }
5275
5276 static void brightness_exit(void)
5277 {
5278 if (ibm_backlight_device) {
5279 vdbg_printk(TPACPI_DBG_EXIT,
5280 "calling backlight_device_unregister()\n");
5281 backlight_device_unregister(ibm_backlight_device);
5282 }
5283 }
5284
5285 static int brightness_read(char *p)
5286 {
5287 int len = 0;
5288 int level;
5289
5290 level = brightness_get(NULL);
5291 if (level < 0) {
5292 len += sprintf(p + len, "level:\t\tunreadable\n");
5293 } else {
5294 len += sprintf(p + len, "level:\t\t%d\n", level);
5295 len += sprintf(p + len, "commands:\tup, down\n");
5296 len += sprintf(p + len, "commands:\tlevel <level>"
5297 " (<level> is 0-%d)\n",
5298 (tp_features.bright_16levels) ? 15 : 7);
5299 }
5300
5301 return len;
5302 }
5303
5304 static int brightness_write(char *buf)
5305 {
5306 int level;
5307 int rc;
5308 char *cmd;
5309 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5310
5311 level = brightness_get(NULL);
5312 if (level < 0)
5313 return level;
5314
5315 while ((cmd = next_cmd(&buf))) {
5316 if (strlencmp(cmd, "up") == 0) {
5317 if (level < max_level)
5318 level++;
5319 } else if (strlencmp(cmd, "down") == 0) {
5320 if (level > 0)
5321 level--;
5322 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5323 level >= 0 && level <= max_level) {
5324 /* new level set */
5325 } else
5326 return -EINVAL;
5327 }
5328
5329 /*
5330 * Now we know what the final level should be, so we try to set it.
5331 * Doing it this way makes the syscall restartable in case of EINTR
5332 */
5333 rc = brightness_set(level);
5334 return (rc == -EINTR)? ERESTARTSYS : rc;
5335 }
5336
5337 static struct ibm_struct brightness_driver_data = {
5338 .name = "brightness",
5339 .read = brightness_read,
5340 .write = brightness_write,
5341 .exit = brightness_exit,
5342 };
5343
5344 /*************************************************************************
5345 * Volume subdriver
5346 */
5347
5348 static int volume_offset = 0x30;
5349
5350 static int volume_read(char *p)
5351 {
5352 int len = 0;
5353 u8 level;
5354
5355 if (!acpi_ec_read(volume_offset, &level)) {
5356 len += sprintf(p + len, "level:\t\tunreadable\n");
5357 } else {
5358 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5359 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5360 len += sprintf(p + len, "commands:\tup, down, mute\n");
5361 len += sprintf(p + len, "commands:\tlevel <level>"
5362 " (<level> is 0-15)\n");
5363 }
5364
5365 return len;
5366 }
5367
5368 static int volume_write(char *buf)
5369 {
5370 int cmos_cmd, inc, i;
5371 u8 level, mute;
5372 int new_level, new_mute;
5373 char *cmd;
5374
5375 while ((cmd = next_cmd(&buf))) {
5376 if (!acpi_ec_read(volume_offset, &level))
5377 return -EIO;
5378 new_mute = mute = level & 0x40;
5379 new_level = level = level & 0xf;
5380
5381 if (strlencmp(cmd, "up") == 0) {
5382 if (mute)
5383 new_mute = 0;
5384 else
5385 new_level = level == 15 ? 15 : level + 1;
5386 } else if (strlencmp(cmd, "down") == 0) {
5387 if (mute)
5388 new_mute = 0;
5389 else
5390 new_level = level == 0 ? 0 : level - 1;
5391 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5392 new_level >= 0 && new_level <= 15) {
5393 /* new_level set */
5394 } else if (strlencmp(cmd, "mute") == 0) {
5395 new_mute = 0x40;
5396 } else
5397 return -EINVAL;
5398
5399 if (new_level != level) {
5400 /* mute doesn't change */
5401
5402 cmos_cmd = (new_level > level) ?
5403 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5404 inc = new_level > level ? 1 : -1;
5405
5406 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5407 !acpi_ec_write(volume_offset, level)))
5408 return -EIO;
5409
5410 for (i = level; i != new_level; i += inc)
5411 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5412 !acpi_ec_write(volume_offset, i + inc))
5413 return -EIO;
5414
5415 if (mute &&
5416 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5417 !acpi_ec_write(volume_offset, new_level + mute))) {
5418 return -EIO;
5419 }
5420 }
5421
5422 if (new_mute != mute) {
5423 /* level doesn't change */
5424
5425 cmos_cmd = (new_mute) ?
5426 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5427
5428 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5429 !acpi_ec_write(volume_offset, level + new_mute))
5430 return -EIO;
5431 }
5432 }
5433
5434 return 0;
5435 }
5436
5437 static struct ibm_struct volume_driver_data = {
5438 .name = "volume",
5439 .read = volume_read,
5440 .write = volume_write,
5441 };
5442
5443 /*************************************************************************
5444 * Fan subdriver
5445 */
5446
5447 /*
5448 * FAN ACCESS MODES
5449 *
5450 * TPACPI_FAN_RD_ACPI_GFAN:
5451 * ACPI GFAN method: returns fan level
5452 *
5453 * see TPACPI_FAN_WR_ACPI_SFAN
5454 * EC 0x2f (HFSP) not available if GFAN exists
5455 *
5456 * TPACPI_FAN_WR_ACPI_SFAN:
5457 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5458 *
5459 * EC 0x2f (HFSP) might be available *for reading*, but do not use
5460 * it for writing.
5461 *
5462 * TPACPI_FAN_WR_TPEC:
5463 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
5464 * Supported on almost all ThinkPads
5465 *
5466 * Fan speed changes of any sort (including those caused by the
5467 * disengaged mode) are usually done slowly by the firmware as the
5468 * maximum ammount of fan duty cycle change per second seems to be
5469 * limited.
5470 *
5471 * Reading is not available if GFAN exists.
5472 * Writing is not available if SFAN exists.
5473 *
5474 * Bits
5475 * 7 automatic mode engaged;
5476 * (default operation mode of the ThinkPad)
5477 * fan level is ignored in this mode.
5478 * 6 full speed mode (takes precedence over bit 7);
5479 * not available on all thinkpads. May disable
5480 * the tachometer while the fan controller ramps up
5481 * the speed (which can take up to a few *minutes*).
5482 * Speeds up fan to 100% duty-cycle, which is far above
5483 * the standard RPM levels. It is not impossible that
5484 * it could cause hardware damage.
5485 * 5-3 unused in some models. Extra bits for fan level
5486 * in others, but still useless as all values above
5487 * 7 map to the same speed as level 7 in these models.
5488 * 2-0 fan level (0..7 usually)
5489 * 0x00 = stop
5490 * 0x07 = max (set when temperatures critical)
5491 * Some ThinkPads may have other levels, see
5492 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5493 *
5494 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5495 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5496 * does so, its initial value is meaningless (0x07).
5497 *
5498 * For firmware bugs, refer to:
5499 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5500 *
5501 * ----
5502 *
5503 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5504 * Main fan tachometer reading (in RPM)
5505 *
5506 * This register is present on all ThinkPads with a new-style EC, and
5507 * it is known not to be present on the A21m/e, and T22, as there is
5508 * something else in offset 0x84 according to the ACPI DSDT. Other
5509 * ThinkPads from this same time period (and earlier) probably lack the
5510 * tachometer as well.
5511 *
5512 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5513 * was never fixed by IBM to report the EC firmware version string
5514 * probably support the tachometer (like the early X models), so
5515 * detecting it is quite hard. We need more data to know for sure.
5516 *
5517 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5518 * might result.
5519 *
5520 * FIRMWARE BUG: may go stale while the EC is switching to full speed
5521 * mode.
5522 *
5523 * For firmware bugs, refer to:
5524 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5525 *
5526 * TPACPI_FAN_WR_ACPI_FANS:
5527 * ThinkPad X31, X40, X41. Not available in the X60.
5528 *
5529 * FANS ACPI handle: takes three arguments: low speed, medium speed,
5530 * high speed. ACPI DSDT seems to map these three speeds to levels
5531 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5532 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5533 *
5534 * The speeds are stored on handles
5535 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5536 *
5537 * There are three default speed sets, acessible as handles:
5538 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5539 *
5540 * ACPI DSDT switches which set is in use depending on various
5541 * factors.
5542 *
5543 * TPACPI_FAN_WR_TPEC is also available and should be used to
5544 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
5545 * but the ACPI tables just mention level 7.
5546 */
5547
5548 enum { /* Fan control constants */
5549 fan_status_offset = 0x2f, /* EC register 0x2f */
5550 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
5551 * 0x84 must be read before 0x85 */
5552
5553 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
5554 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
5555
5556 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
5557 };
5558
5559 enum fan_status_access_mode {
5560 TPACPI_FAN_NONE = 0, /* No fan status or control */
5561 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
5562 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5563 };
5564
5565 enum fan_control_access_mode {
5566 TPACPI_FAN_WR_NONE = 0, /* No fan control */
5567 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
5568 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
5569 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
5570 };
5571
5572 enum fan_control_commands {
5573 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
5574 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
5575 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
5576 * and also watchdog cmd */
5577 };
5578
5579 static int fan_control_allowed;
5580
5581 static enum fan_status_access_mode fan_status_access_mode;
5582 static enum fan_control_access_mode fan_control_access_mode;
5583 static enum fan_control_commands fan_control_commands;
5584
5585 static u8 fan_control_initial_status;
5586 static u8 fan_control_desired_level;
5587 static u8 fan_control_resume_level;
5588 static int fan_watchdog_maxinterval;
5589
5590 static struct mutex fan_mutex;
5591
5592 static void fan_watchdog_fire(struct work_struct *ignored);
5593 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5594
5595 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
5596 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5597 "\\FSPD", /* 600e/x, 770e, 770x */
5598 ); /* all others */
5599 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5600 "JFNS", /* 770x-JL */
5601 ); /* all others */
5602
5603 /*
5604 * Call with fan_mutex held
5605 */
5606 static void fan_update_desired_level(u8 status)
5607 {
5608 if ((status &
5609 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5610 if (status > 7)
5611 fan_control_desired_level = 7;
5612 else
5613 fan_control_desired_level = status;
5614 }
5615 }
5616
5617 static int fan_get_status(u8 *status)
5618 {
5619 u8 s;
5620
5621 /* TODO:
5622 * Add TPACPI_FAN_RD_ACPI_FANS ? */
5623
5624 switch (fan_status_access_mode) {
5625 case TPACPI_FAN_RD_ACPI_GFAN:
5626 /* 570, 600e/x, 770e, 770x */
5627
5628 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5629 return -EIO;
5630
5631 if (likely(status))
5632 *status = s & 0x07;
5633
5634 break;
5635
5636 case TPACPI_FAN_RD_TPEC:
5637 /* all except 570, 600e/x, 770e, 770x */
5638 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5639 return -EIO;
5640
5641 if (likely(status))
5642 *status = s;
5643
5644 break;
5645
5646 default:
5647 return -ENXIO;
5648 }
5649
5650 return 0;
5651 }
5652
5653 static int fan_get_status_safe(u8 *status)
5654 {
5655 int rc;
5656 u8 s;
5657
5658 if (mutex_lock_interruptible(&fan_mutex))
5659 return -ERESTARTSYS;
5660 rc = fan_get_status(&s);
5661 if (!rc)
5662 fan_update_desired_level(s);
5663 mutex_unlock(&fan_mutex);
5664
5665 if (status)
5666 *status = s;
5667
5668 return rc;
5669 }
5670
5671 static int fan_get_speed(unsigned int *speed)
5672 {
5673 u8 hi, lo;
5674
5675 switch (fan_status_access_mode) {
5676 case TPACPI_FAN_RD_TPEC:
5677 /* all except 570, 600e/x, 770e, 770x */
5678 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5679 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5680 return -EIO;
5681
5682 if (likely(speed))
5683 *speed = (hi << 8) | lo;
5684
5685 break;
5686
5687 default:
5688 return -ENXIO;
5689 }
5690
5691 return 0;
5692 }
5693
5694 static int fan_set_level(int level)
5695 {
5696 if (!fan_control_allowed)
5697 return -EPERM;
5698
5699 switch (fan_control_access_mode) {
5700 case TPACPI_FAN_WR_ACPI_SFAN:
5701 if (level >= 0 && level <= 7) {
5702 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5703 return -EIO;
5704 } else
5705 return -EINVAL;
5706 break;
5707
5708 case TPACPI_FAN_WR_ACPI_FANS:
5709 case TPACPI_FAN_WR_TPEC:
5710 if (!(level & TP_EC_FAN_AUTO) &&
5711 !(level & TP_EC_FAN_FULLSPEED) &&
5712 ((level < 0) || (level > 7)))
5713 return -EINVAL;
5714
5715 /* safety net should the EC not support AUTO
5716 * or FULLSPEED mode bits and just ignore them */
5717 if (level & TP_EC_FAN_FULLSPEED)
5718 level |= 7; /* safety min speed 7 */
5719 else if (level & TP_EC_FAN_AUTO)
5720 level |= 4; /* safety min speed 4 */
5721
5722 if (!acpi_ec_write(fan_status_offset, level))
5723 return -EIO;
5724 else
5725 tp_features.fan_ctrl_status_undef = 0;
5726 break;
5727
5728 default:
5729 return -ENXIO;
5730 }
5731 return 0;
5732 }
5733
5734 static int fan_set_level_safe(int level)
5735 {
5736 int rc;
5737
5738 if (!fan_control_allowed)
5739 return -EPERM;
5740
5741 if (mutex_lock_interruptible(&fan_mutex))
5742 return -ERESTARTSYS;
5743
5744 if (level == TPACPI_FAN_LAST_LEVEL)
5745 level = fan_control_desired_level;
5746
5747 rc = fan_set_level(level);
5748 if (!rc)
5749 fan_update_desired_level(level);
5750
5751 mutex_unlock(&fan_mutex);
5752 return rc;
5753 }
5754
5755 static int fan_set_enable(void)
5756 {
5757 u8 s;
5758 int rc;
5759
5760 if (!fan_control_allowed)
5761 return -EPERM;
5762
5763 if (mutex_lock_interruptible(&fan_mutex))
5764 return -ERESTARTSYS;
5765
5766 switch (fan_control_access_mode) {
5767 case TPACPI_FAN_WR_ACPI_FANS:
5768 case TPACPI_FAN_WR_TPEC:
5769 rc = fan_get_status(&s);
5770 if (rc < 0)
5771 break;
5772
5773 /* Don't go out of emergency fan mode */
5774 if (s != 7) {
5775 s &= 0x07;
5776 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5777 }
5778
5779 if (!acpi_ec_write(fan_status_offset, s))
5780 rc = -EIO;
5781 else {
5782 tp_features.fan_ctrl_status_undef = 0;
5783 rc = 0;
5784 }
5785 break;
5786
5787 case TPACPI_FAN_WR_ACPI_SFAN:
5788 rc = fan_get_status(&s);
5789 if (rc < 0)
5790 break;
5791
5792 s &= 0x07;
5793
5794 /* Set fan to at least level 4 */
5795 s |= 4;
5796
5797 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5798 rc = -EIO;
5799 else
5800 rc = 0;
5801 break;
5802
5803 default:
5804 rc = -ENXIO;
5805 }
5806
5807 mutex_unlock(&fan_mutex);
5808 return rc;
5809 }
5810
5811 static int fan_set_disable(void)
5812 {
5813 int rc;
5814
5815 if (!fan_control_allowed)
5816 return -EPERM;
5817
5818 if (mutex_lock_interruptible(&fan_mutex))
5819 return -ERESTARTSYS;
5820
5821 rc = 0;
5822 switch (fan_control_access_mode) {
5823 case TPACPI_FAN_WR_ACPI_FANS:
5824 case TPACPI_FAN_WR_TPEC:
5825 if (!acpi_ec_write(fan_status_offset, 0x00))
5826 rc = -EIO;
5827 else {
5828 fan_control_desired_level = 0;
5829 tp_features.fan_ctrl_status_undef = 0;
5830 }
5831 break;
5832
5833 case TPACPI_FAN_WR_ACPI_SFAN:
5834 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5835 rc = -EIO;
5836 else
5837 fan_control_desired_level = 0;
5838 break;
5839
5840 default:
5841 rc = -ENXIO;
5842 }
5843
5844
5845 mutex_unlock(&fan_mutex);
5846 return rc;
5847 }
5848
5849 static int fan_set_speed(int speed)
5850 {
5851 int rc;
5852
5853 if (!fan_control_allowed)
5854 return -EPERM;
5855
5856 if (mutex_lock_interruptible(&fan_mutex))
5857 return -ERESTARTSYS;
5858
5859 rc = 0;
5860 switch (fan_control_access_mode) {
5861 case TPACPI_FAN_WR_ACPI_FANS:
5862 if (speed >= 0 && speed <= 65535) {
5863 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5864 speed, speed, speed))
5865 rc = -EIO;
5866 } else
5867 rc = -EINVAL;
5868 break;
5869
5870 default:
5871 rc = -ENXIO;
5872 }
5873
5874 mutex_unlock(&fan_mutex);
5875 return rc;
5876 }
5877
5878 static void fan_watchdog_reset(void)
5879 {
5880 static int fan_watchdog_active;
5881
5882 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5883 return;
5884
5885 if (fan_watchdog_active)
5886 cancel_delayed_work(&fan_watchdog_task);
5887
5888 if (fan_watchdog_maxinterval > 0 &&
5889 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5890 fan_watchdog_active = 1;
5891 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
5892 msecs_to_jiffies(fan_watchdog_maxinterval
5893 * 1000))) {
5894 printk(TPACPI_ERR
5895 "failed to queue the fan watchdog, "
5896 "watchdog will not trigger\n");
5897 }
5898 } else
5899 fan_watchdog_active = 0;
5900 }
5901
5902 static void fan_watchdog_fire(struct work_struct *ignored)
5903 {
5904 int rc;
5905
5906 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5907 return;
5908
5909 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5910 rc = fan_set_enable();
5911 if (rc < 0) {
5912 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5913 "will try again later...\n", -rc);
5914 /* reschedule for later */
5915 fan_watchdog_reset();
5916 }
5917 }
5918
5919 /*
5920 * SYSFS fan layout: hwmon compatible (device)
5921 *
5922 * pwm*_enable:
5923 * 0: "disengaged" mode
5924 * 1: manual mode
5925 * 2: native EC "auto" mode (recommended, hardware default)
5926 *
5927 * pwm*: set speed in manual mode, ignored otherwise.
5928 * 0 is level 0; 255 is level 7. Intermediate points done with linear
5929 * interpolation.
5930 *
5931 * fan*_input: tachometer reading, RPM
5932 *
5933 *
5934 * SYSFS fan layout: extensions
5935 *
5936 * fan_watchdog (driver):
5937 * fan watchdog interval in seconds, 0 disables (default), max 120
5938 */
5939
5940 /* sysfs fan pwm1_enable ----------------------------------------------- */
5941 static ssize_t fan_pwm1_enable_show(struct device *dev,
5942 struct device_attribute *attr,
5943 char *buf)
5944 {
5945 int res, mode;
5946 u8 status;
5947
5948 res = fan_get_status_safe(&status);
5949 if (res)
5950 return res;
5951
5952 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5953 if (status != fan_control_initial_status) {
5954 tp_features.fan_ctrl_status_undef = 0;
5955 } else {
5956 /* Return most likely status. In fact, it
5957 * might be the only possible status */
5958 status = TP_EC_FAN_AUTO;
5959 }
5960 }
5961
5962 if (status & TP_EC_FAN_FULLSPEED) {
5963 mode = 0;
5964 } else if (status & TP_EC_FAN_AUTO) {
5965 mode = 2;
5966 } else
5967 mode = 1;
5968
5969 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5970 }
5971
5972 static ssize_t fan_pwm1_enable_store(struct device *dev,
5973 struct device_attribute *attr,
5974 const char *buf, size_t count)
5975 {
5976 unsigned long t;
5977 int res, level;
5978
5979 if (parse_strtoul(buf, 2, &t))
5980 return -EINVAL;
5981
5982 switch (t) {
5983 case 0:
5984 level = TP_EC_FAN_FULLSPEED;
5985 break;
5986 case 1:
5987 level = TPACPI_FAN_LAST_LEVEL;
5988 break;
5989 case 2:
5990 level = TP_EC_FAN_AUTO;
5991 break;
5992 case 3:
5993 /* reserved for software-controlled auto mode */
5994 return -ENOSYS;
5995 default:
5996 return -EINVAL;
5997 }
5998
5999 res = fan_set_level_safe(level);
6000 if (res == -ENXIO)
6001 return -EINVAL;
6002 else if (res < 0)
6003 return res;
6004
6005 fan_watchdog_reset();
6006
6007 return count;
6008 }
6009
6010 static struct device_attribute dev_attr_fan_pwm1_enable =
6011 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6012 fan_pwm1_enable_show, fan_pwm1_enable_store);
6013
6014 /* sysfs fan pwm1 ------------------------------------------------------ */
6015 static ssize_t fan_pwm1_show(struct device *dev,
6016 struct device_attribute *attr,
6017 char *buf)
6018 {
6019 int res;
6020 u8 status;
6021
6022 res = fan_get_status_safe(&status);
6023 if (res)
6024 return res;
6025
6026 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6027 if (status != fan_control_initial_status) {
6028 tp_features.fan_ctrl_status_undef = 0;
6029 } else {
6030 status = TP_EC_FAN_AUTO;
6031 }
6032 }
6033
6034 if ((status &
6035 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6036 status = fan_control_desired_level;
6037
6038 if (status > 7)
6039 status = 7;
6040
6041 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6042 }
6043
6044 static ssize_t fan_pwm1_store(struct device *dev,
6045 struct device_attribute *attr,
6046 const char *buf, size_t count)
6047 {
6048 unsigned long s;
6049 int rc;
6050 u8 status, newlevel;
6051
6052 if (parse_strtoul(buf, 255, &s))
6053 return -EINVAL;
6054
6055 /* scale down from 0-255 to 0-7 */
6056 newlevel = (s >> 5) & 0x07;
6057
6058 if (mutex_lock_interruptible(&fan_mutex))
6059 return -ERESTARTSYS;
6060
6061 rc = fan_get_status(&status);
6062 if (!rc && (status &
6063 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6064 rc = fan_set_level(newlevel);
6065 if (rc == -ENXIO)
6066 rc = -EINVAL;
6067 else if (!rc) {
6068 fan_update_desired_level(newlevel);
6069 fan_watchdog_reset();
6070 }
6071 }
6072
6073 mutex_unlock(&fan_mutex);
6074 return (rc)? rc : count;
6075 }
6076
6077 static struct device_attribute dev_attr_fan_pwm1 =
6078 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6079 fan_pwm1_show, fan_pwm1_store);
6080
6081 /* sysfs fan fan1_input ------------------------------------------------ */
6082 static ssize_t fan_fan1_input_show(struct device *dev,
6083 struct device_attribute *attr,
6084 char *buf)
6085 {
6086 int res;
6087 unsigned int speed;
6088
6089 res = fan_get_speed(&speed);
6090 if (res < 0)
6091 return res;
6092
6093 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6094 }
6095
6096 static struct device_attribute dev_attr_fan_fan1_input =
6097 __ATTR(fan1_input, S_IRUGO,
6098 fan_fan1_input_show, NULL);
6099
6100 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6101 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6102 char *buf)
6103 {
6104 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6105 }
6106
6107 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6108 const char *buf, size_t count)
6109 {
6110 unsigned long t;
6111
6112 if (parse_strtoul(buf, 120, &t))
6113 return -EINVAL;
6114
6115 if (!fan_control_allowed)
6116 return -EPERM;
6117
6118 fan_watchdog_maxinterval = t;
6119 fan_watchdog_reset();
6120
6121 return count;
6122 }
6123
6124 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6125 fan_fan_watchdog_show, fan_fan_watchdog_store);
6126
6127 /* --------------------------------------------------------------------- */
6128 static struct attribute *fan_attributes[] = {
6129 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6130 &dev_attr_fan_fan1_input.attr,
6131 NULL
6132 };
6133
6134 static const struct attribute_group fan_attr_group = {
6135 .attrs = fan_attributes,
6136 };
6137
6138 static int __init fan_init(struct ibm_init_struct *iibm)
6139 {
6140 int rc;
6141
6142 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
6143
6144 mutex_init(&fan_mutex);
6145 fan_status_access_mode = TPACPI_FAN_NONE;
6146 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6147 fan_control_commands = 0;
6148 fan_watchdog_maxinterval = 0;
6149 tp_features.fan_ctrl_status_undef = 0;
6150 fan_control_desired_level = 7;
6151
6152 TPACPI_ACPIHANDLE_INIT(fans);
6153 TPACPI_ACPIHANDLE_INIT(gfan);
6154 TPACPI_ACPIHANDLE_INIT(sfan);
6155
6156 if (gfan_handle) {
6157 /* 570, 600e/x, 770e, 770x */
6158 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6159 } else {
6160 /* all other ThinkPads: note that even old-style
6161 * ThinkPad ECs supports the fan control register */
6162 if (likely(acpi_ec_read(fan_status_offset,
6163 &fan_control_initial_status))) {
6164 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6165
6166 /* In some ThinkPads, neither the EC nor the ACPI
6167 * DSDT initialize the fan status, and it ends up
6168 * being set to 0x07 when it *could* be either
6169 * 0x07 or 0x80.
6170 *
6171 * Enable for TP-1Y (T43), TP-78 (R51e),
6172 * TP-76 (R52), TP-70 (T43, R52), which are known
6173 * to be buggy. */
6174 if (fan_control_initial_status == 0x07) {
6175 switch (thinkpad_id.ec_model) {
6176 case 0x5931: /* TP-1Y */
6177 case 0x3837: /* TP-78 */
6178 case 0x3637: /* TP-76 */
6179 case 0x3037: /* TP-70 */
6180 printk(TPACPI_NOTICE
6181 "fan_init: initial fan status "
6182 "is unknown, assuming it is "
6183 "in auto mode\n");
6184 tp_features.fan_ctrl_status_undef = 1;
6185 ;;
6186 }
6187 }
6188 } else {
6189 printk(TPACPI_ERR
6190 "ThinkPad ACPI EC access misbehaving, "
6191 "fan status and control unavailable\n");
6192 return 1;
6193 }
6194 }
6195
6196 if (sfan_handle) {
6197 /* 570, 770x-JL */
6198 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6199 fan_control_commands |=
6200 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6201 } else {
6202 if (!gfan_handle) {
6203 /* gfan without sfan means no fan control */
6204 /* all other models implement TP EC 0x2f control */
6205
6206 if (fans_handle) {
6207 /* X31, X40, X41 */
6208 fan_control_access_mode =
6209 TPACPI_FAN_WR_ACPI_FANS;
6210 fan_control_commands |=
6211 TPACPI_FAN_CMD_SPEED |
6212 TPACPI_FAN_CMD_LEVEL |
6213 TPACPI_FAN_CMD_ENABLE;
6214 } else {
6215 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6216 fan_control_commands |=
6217 TPACPI_FAN_CMD_LEVEL |
6218 TPACPI_FAN_CMD_ENABLE;
6219 }
6220 }
6221 }
6222
6223 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
6224 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6225 fan_control_access_mode != TPACPI_FAN_WR_NONE),
6226 fan_status_access_mode, fan_control_access_mode);
6227
6228 /* fan control master switch */
6229 if (!fan_control_allowed) {
6230 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6231 fan_control_commands = 0;
6232 dbg_printk(TPACPI_DBG_INIT,
6233 "fan control features disabled by parameter\n");
6234 }
6235
6236 /* update fan_control_desired_level */
6237 if (fan_status_access_mode != TPACPI_FAN_NONE)
6238 fan_get_status_safe(NULL);
6239
6240 if (fan_status_access_mode != TPACPI_FAN_NONE ||
6241 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6242 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6243 &fan_attr_group);
6244 if (rc < 0)
6245 return rc;
6246
6247 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6248 &driver_attr_fan_watchdog);
6249 if (rc < 0) {
6250 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6251 &fan_attr_group);
6252 return rc;
6253 }
6254 return 0;
6255 } else
6256 return 1;
6257 }
6258
6259 static void fan_exit(void)
6260 {
6261 vdbg_printk(TPACPI_DBG_EXIT,
6262 "cancelling any pending fan watchdog tasks\n");
6263
6264 /* FIXME: can we really do this unconditionally? */
6265 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6266 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6267 &driver_attr_fan_watchdog);
6268
6269 cancel_delayed_work(&fan_watchdog_task);
6270 flush_workqueue(tpacpi_wq);
6271 }
6272
6273 static void fan_suspend(pm_message_t state)
6274 {
6275 int rc;
6276
6277 if (!fan_control_allowed)
6278 return;
6279
6280 /* Store fan status in cache */
6281 fan_control_resume_level = 0;
6282 rc = fan_get_status_safe(&fan_control_resume_level);
6283 if (rc < 0)
6284 printk(TPACPI_NOTICE
6285 "failed to read fan level for later "
6286 "restore during resume: %d\n", rc);
6287
6288 /* if it is undefined, don't attempt to restore it.
6289 * KEEP THIS LAST */
6290 if (tp_features.fan_ctrl_status_undef)
6291 fan_control_resume_level = 0;
6292 }
6293
6294 static void fan_resume(void)
6295 {
6296 u8 current_level = 7;
6297 bool do_set = false;
6298 int rc;
6299
6300 /* DSDT *always* updates status on resume */
6301 tp_features.fan_ctrl_status_undef = 0;
6302
6303 if (!fan_control_allowed ||
6304 !fan_control_resume_level ||
6305 (fan_get_status_safe(&current_level) < 0))
6306 return;
6307
6308 switch (fan_control_access_mode) {
6309 case TPACPI_FAN_WR_ACPI_SFAN:
6310 /* never decrease fan level */
6311 do_set = (fan_control_resume_level > current_level);
6312 break;
6313 case TPACPI_FAN_WR_ACPI_FANS:
6314 case TPACPI_FAN_WR_TPEC:
6315 /* never decrease fan level, scale is:
6316 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6317 *
6318 * We expect the firmware to set either 7 or AUTO, but we
6319 * handle FULLSPEED out of paranoia.
6320 *
6321 * So, we can safely only restore FULLSPEED or 7, anything
6322 * else could slow the fan. Restoring AUTO is useless, at
6323 * best that's exactly what the DSDT already set (it is the
6324 * slower it uses).
6325 *
6326 * Always keep in mind that the DSDT *will* have set the
6327 * fans to what the vendor supposes is the best level. We
6328 * muck with it only to speed the fan up.
6329 */
6330 if (fan_control_resume_level != 7 &&
6331 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6332 return;
6333 else
6334 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6335 (current_level != fan_control_resume_level);
6336 break;
6337 default:
6338 return;
6339 }
6340 if (do_set) {
6341 printk(TPACPI_NOTICE
6342 "restoring fan level to 0x%02x\n",
6343 fan_control_resume_level);
6344 rc = fan_set_level_safe(fan_control_resume_level);
6345 if (rc < 0)
6346 printk(TPACPI_NOTICE
6347 "failed to restore fan level: %d\n", rc);
6348 }
6349 }
6350
6351 static int fan_read(char *p)
6352 {
6353 int len = 0;
6354 int rc;
6355 u8 status;
6356 unsigned int speed = 0;
6357
6358 switch (fan_status_access_mode) {
6359 case TPACPI_FAN_RD_ACPI_GFAN:
6360 /* 570, 600e/x, 770e, 770x */
6361 rc = fan_get_status_safe(&status);
6362 if (rc < 0)
6363 return rc;
6364
6365 len += sprintf(p + len, "status:\t\t%s\n"
6366 "level:\t\t%d\n",
6367 (status != 0) ? "enabled" : "disabled", status);
6368 break;
6369
6370 case TPACPI_FAN_RD_TPEC:
6371 /* all except 570, 600e/x, 770e, 770x */
6372 rc = fan_get_status_safe(&status);
6373 if (rc < 0)
6374 return rc;
6375
6376 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6377 if (status != fan_control_initial_status)
6378 tp_features.fan_ctrl_status_undef = 0;
6379 else
6380 /* Return most likely status. In fact, it
6381 * might be the only possible status */
6382 status = TP_EC_FAN_AUTO;
6383 }
6384
6385 len += sprintf(p + len, "status:\t\t%s\n",
6386 (status != 0) ? "enabled" : "disabled");
6387
6388 rc = fan_get_speed(&speed);
6389 if (rc < 0)
6390 return rc;
6391
6392 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6393
6394 if (status & TP_EC_FAN_FULLSPEED)
6395 /* Disengaged mode takes precedence */
6396 len += sprintf(p + len, "level:\t\tdisengaged\n");
6397 else if (status & TP_EC_FAN_AUTO)
6398 len += sprintf(p + len, "level:\t\tauto\n");
6399 else
6400 len += sprintf(p + len, "level:\t\t%d\n", status);
6401 break;
6402
6403 case TPACPI_FAN_NONE:
6404 default:
6405 len += sprintf(p + len, "status:\t\tnot supported\n");
6406 }
6407
6408 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6409 len += sprintf(p + len, "commands:\tlevel <level>");
6410
6411 switch (fan_control_access_mode) {
6412 case TPACPI_FAN_WR_ACPI_SFAN:
6413 len += sprintf(p + len, " (<level> is 0-7)\n");
6414 break;
6415
6416 default:
6417 len += sprintf(p + len, " (<level> is 0-7, "
6418 "auto, disengaged, full-speed)\n");
6419 break;
6420 }
6421 }
6422
6423 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6424 len += sprintf(p + len, "commands:\tenable, disable\n"
6425 "commands:\twatchdog <timeout> (<timeout> "
6426 "is 0 (off), 1-120 (seconds))\n");
6427
6428 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6429 len += sprintf(p + len, "commands:\tspeed <speed>"
6430 " (<speed> is 0-65535)\n");
6431
6432 return len;
6433 }
6434
6435 static int fan_write_cmd_level(const char *cmd, int *rc)
6436 {
6437 int level;
6438
6439 if (strlencmp(cmd, "level auto") == 0)
6440 level = TP_EC_FAN_AUTO;
6441 else if ((strlencmp(cmd, "level disengaged") == 0) |
6442 (strlencmp(cmd, "level full-speed") == 0))
6443 level = TP_EC_FAN_FULLSPEED;
6444 else if (sscanf(cmd, "level %d", &level) != 1)
6445 return 0;
6446
6447 *rc = fan_set_level_safe(level);
6448 if (*rc == -ENXIO)
6449 printk(TPACPI_ERR "level command accepted for unsupported "
6450 "access mode %d", fan_control_access_mode);
6451
6452 return 1;
6453 }
6454
6455 static int fan_write_cmd_enable(const char *cmd, int *rc)
6456 {
6457 if (strlencmp(cmd, "enable") != 0)
6458 return 0;
6459
6460 *rc = fan_set_enable();
6461 if (*rc == -ENXIO)
6462 printk(TPACPI_ERR "enable command accepted for unsupported "
6463 "access mode %d", fan_control_access_mode);
6464
6465 return 1;
6466 }
6467
6468 static int fan_write_cmd_disable(const char *cmd, int *rc)
6469 {
6470 if (strlencmp(cmd, "disable") != 0)
6471 return 0;
6472
6473 *rc = fan_set_disable();
6474 if (*rc == -ENXIO)
6475 printk(TPACPI_ERR "disable command accepted for unsupported "
6476 "access mode %d", fan_control_access_mode);
6477
6478 return 1;
6479 }
6480
6481 static int fan_write_cmd_speed(const char *cmd, int *rc)
6482 {
6483 int speed;
6484
6485 /* TODO:
6486 * Support speed <low> <medium> <high> ? */
6487
6488 if (sscanf(cmd, "speed %d", &speed) != 1)
6489 return 0;
6490
6491 *rc = fan_set_speed(speed);
6492 if (*rc == -ENXIO)
6493 printk(TPACPI_ERR "speed command accepted for unsupported "
6494 "access mode %d", fan_control_access_mode);
6495
6496 return 1;
6497 }
6498
6499 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6500 {
6501 int interval;
6502
6503 if (sscanf(cmd, "watchdog %d", &interval) != 1)
6504 return 0;
6505
6506 if (interval < 0 || interval > 120)
6507 *rc = -EINVAL;
6508 else
6509 fan_watchdog_maxinterval = interval;
6510
6511 return 1;
6512 }
6513
6514 static int fan_write(char *buf)
6515 {
6516 char *cmd;
6517 int rc = 0;
6518
6519 while (!rc && (cmd = next_cmd(&buf))) {
6520 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6521 fan_write_cmd_level(cmd, &rc)) &&
6522 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6523 (fan_write_cmd_enable(cmd, &rc) ||
6524 fan_write_cmd_disable(cmd, &rc) ||
6525 fan_write_cmd_watchdog(cmd, &rc))) &&
6526 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6527 fan_write_cmd_speed(cmd, &rc))
6528 )
6529 rc = -EINVAL;
6530 else if (!rc)
6531 fan_watchdog_reset();
6532 }
6533
6534 return rc;
6535 }
6536
6537 static struct ibm_struct fan_driver_data = {
6538 .name = "fan",
6539 .read = fan_read,
6540 .write = fan_write,
6541 .exit = fan_exit,
6542 .suspend = fan_suspend,
6543 .resume = fan_resume,
6544 };
6545
6546 /****************************************************************************
6547 ****************************************************************************
6548 *
6549 * Infrastructure
6550 *
6551 ****************************************************************************
6552 ****************************************************************************/
6553
6554 /* sysfs name ---------------------------------------------------------- */
6555 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6556 struct device_attribute *attr,
6557 char *buf)
6558 {
6559 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6560 }
6561
6562 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6563 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6564
6565 /* --------------------------------------------------------------------- */
6566
6567 /* /proc support */
6568 static struct proc_dir_entry *proc_dir;
6569
6570 /*
6571 * Module and infrastructure proble, init and exit handling
6572 */
6573
6574 static int force_load;
6575
6576 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6577 static const char * __init str_supported(int is_supported)
6578 {
6579 static char text_unsupported[] __initdata = "not supported";
6580
6581 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6582 }
6583 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6584
6585 static void ibm_exit(struct ibm_struct *ibm)
6586 {
6587 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6588
6589 list_del_init(&ibm->all_drivers);
6590
6591 if (ibm->flags.acpi_notify_installed) {
6592 dbg_printk(TPACPI_DBG_EXIT,
6593 "%s: acpi_remove_notify_handler\n", ibm->name);
6594 BUG_ON(!ibm->acpi);
6595 acpi_remove_notify_handler(*ibm->acpi->handle,
6596 ibm->acpi->type,
6597 dispatch_acpi_notify);
6598 ibm->flags.acpi_notify_installed = 0;
6599 ibm->flags.acpi_notify_installed = 0;
6600 }
6601
6602 if (ibm->flags.proc_created) {
6603 dbg_printk(TPACPI_DBG_EXIT,
6604 "%s: remove_proc_entry\n", ibm->name);
6605 remove_proc_entry(ibm->name, proc_dir);
6606 ibm->flags.proc_created = 0;
6607 }
6608
6609 if (ibm->flags.acpi_driver_registered) {
6610 dbg_printk(TPACPI_DBG_EXIT,
6611 "%s: acpi_bus_unregister_driver\n", ibm->name);
6612 BUG_ON(!ibm->acpi);
6613 acpi_bus_unregister_driver(ibm->acpi->driver);
6614 kfree(ibm->acpi->driver);
6615 ibm->acpi->driver = NULL;
6616 ibm->flags.acpi_driver_registered = 0;
6617 }
6618
6619 if (ibm->flags.init_called && ibm->exit) {
6620 ibm->exit();
6621 ibm->flags.init_called = 0;
6622 }
6623
6624 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6625 }
6626
6627 static int __init ibm_init(struct ibm_init_struct *iibm)
6628 {
6629 int ret;
6630 struct ibm_struct *ibm = iibm->data;
6631 struct proc_dir_entry *entry;
6632
6633 BUG_ON(ibm == NULL);
6634
6635 INIT_LIST_HEAD(&ibm->all_drivers);
6636
6637 if (ibm->flags.experimental && !experimental)
6638 return 0;
6639
6640 dbg_printk(TPACPI_DBG_INIT,
6641 "probing for %s\n", ibm->name);
6642
6643 if (iibm->init) {
6644 ret = iibm->init(iibm);
6645 if (ret > 0)
6646 return 0; /* probe failed */
6647 if (ret)
6648 return ret;
6649
6650 ibm->flags.init_called = 1;
6651 }
6652
6653 if (ibm->acpi) {
6654 if (ibm->acpi->hid) {
6655 ret = register_tpacpi_subdriver(ibm);
6656 if (ret)
6657 goto err_out;
6658 }
6659
6660 if (ibm->acpi->notify) {
6661 ret = setup_acpi_notify(ibm);
6662 if (ret == -ENODEV) {
6663 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6664 ibm->name);
6665 ret = 0;
6666 goto err_out;
6667 }
6668 if (ret < 0)
6669 goto err_out;
6670 }
6671 }
6672
6673 dbg_printk(TPACPI_DBG_INIT,
6674 "%s installed\n", ibm->name);
6675
6676 if (ibm->read) {
6677 entry = create_proc_entry(ibm->name,
6678 S_IFREG | S_IRUGO | S_IWUSR,
6679 proc_dir);
6680 if (!entry) {
6681 printk(TPACPI_ERR "unable to create proc entry %s\n",
6682 ibm->name);
6683 ret = -ENODEV;
6684 goto err_out;
6685 }
6686 entry->owner = THIS_MODULE;
6687 entry->data = ibm;
6688 entry->read_proc = &dispatch_procfs_read;
6689 if (ibm->write)
6690 entry->write_proc = &dispatch_procfs_write;
6691 ibm->flags.proc_created = 1;
6692 }
6693
6694 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6695
6696 return 0;
6697
6698 err_out:
6699 dbg_printk(TPACPI_DBG_INIT,
6700 "%s: at error exit path with result %d\n",
6701 ibm->name, ret);
6702
6703 ibm_exit(ibm);
6704 return (ret < 0)? ret : 0;
6705 }
6706
6707 /* Probing */
6708
6709 /* returns 0 - probe ok, or < 0 - probe error.
6710 * Probe ok doesn't mean thinkpad found.
6711 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
6712 static int __must_check __init get_thinkpad_model_data(
6713 struct thinkpad_id_data *tp)
6714 {
6715 const struct dmi_device *dev = NULL;
6716 char ec_fw_string[18];
6717 char const *s;
6718
6719 if (!tp)
6720 return -EINVAL;
6721
6722 memset(tp, 0, sizeof(*tp));
6723
6724 if (dmi_name_in_vendors("IBM"))
6725 tp->vendor = PCI_VENDOR_ID_IBM;
6726 else if (dmi_name_in_vendors("LENOVO"))
6727 tp->vendor = PCI_VENDOR_ID_LENOVO;
6728 else
6729 return 0;
6730
6731 s = dmi_get_system_info(DMI_BIOS_VERSION);
6732 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
6733 if (s && !tp->bios_version_str)
6734 return -ENOMEM;
6735 if (!tp->bios_version_str)
6736 return 0;
6737 tp->bios_model = tp->bios_version_str[0]
6738 | (tp->bios_version_str[1] << 8);
6739
6740 /*
6741 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
6742 * X32 or newer, all Z series; Some models must have an
6743 * up-to-date BIOS or they will not be detected.
6744 *
6745 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6746 */
6747 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
6748 if (sscanf(dev->name,
6749 "IBM ThinkPad Embedded Controller -[%17c",
6750 ec_fw_string) == 1) {
6751 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
6752 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
6753
6754 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
6755 if (!tp->ec_version_str)
6756 return -ENOMEM;
6757 tp->ec_model = ec_fw_string[0]
6758 | (ec_fw_string[1] << 8);
6759 break;
6760 }
6761 }
6762
6763 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
6764 if (s && !strnicmp(s, "ThinkPad", 8)) {
6765 tp->model_str = kstrdup(s, GFP_KERNEL);
6766 if (!tp->model_str)
6767 return -ENOMEM;
6768 }
6769
6770 s = dmi_get_system_info(DMI_PRODUCT_NAME);
6771 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
6772 if (s && !tp->nummodel_str)
6773 return -ENOMEM;
6774
6775 return 0;
6776 }
6777
6778 static int __init probe_for_thinkpad(void)
6779 {
6780 int is_thinkpad;
6781
6782 if (acpi_disabled)
6783 return -ENODEV;
6784
6785 /*
6786 * Non-ancient models have better DMI tagging, but very old models
6787 * don't.
6788 */
6789 is_thinkpad = (thinkpad_id.model_str != NULL);
6790
6791 /* ec is required because many other handles are relative to it */
6792 TPACPI_ACPIHANDLE_INIT(ec);
6793 if (!ec_handle) {
6794 if (is_thinkpad)
6795 printk(TPACPI_ERR
6796 "Not yet supported ThinkPad detected!\n");
6797 return -ENODEV;
6798 }
6799
6800 /*
6801 * Risks a regression on very old machines, but reduces potential
6802 * false positives a damn great deal
6803 */
6804 if (!is_thinkpad)
6805 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6806
6807 if (!is_thinkpad && !force_load)
6808 return -ENODEV;
6809
6810 return 0;
6811 }
6812
6813
6814 /* Module init, exit, parameters */
6815
6816 static struct ibm_init_struct ibms_init[] __initdata = {
6817 {
6818 .init = thinkpad_acpi_driver_init,
6819 .data = &thinkpad_acpi_driver_data,
6820 },
6821 {
6822 .init = hotkey_init,
6823 .data = &hotkey_driver_data,
6824 },
6825 {
6826 .init = bluetooth_init,
6827 .data = &bluetooth_driver_data,
6828 },
6829 {
6830 .init = wan_init,
6831 .data = &wan_driver_data,
6832 },
6833 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6834 {
6835 .init = video_init,
6836 .data = &video_driver_data,
6837 },
6838 #endif
6839 {
6840 .init = light_init,
6841 .data = &light_driver_data,
6842 },
6843 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6844 {
6845 .init = dock_init,
6846 .data = &dock_driver_data[0],
6847 },
6848 {
6849 .init = dock_init2,
6850 .data = &dock_driver_data[1],
6851 },
6852 #endif
6853 #ifdef CONFIG_THINKPAD_ACPI_BAY
6854 {
6855 .init = bay_init,
6856 .data = &bay_driver_data,
6857 },
6858 #endif
6859 {
6860 .init = cmos_init,
6861 .data = &cmos_driver_data,
6862 },
6863 {
6864 .init = led_init,
6865 .data = &led_driver_data,
6866 },
6867 {
6868 .init = beep_init,
6869 .data = &beep_driver_data,
6870 },
6871 {
6872 .init = thermal_init,
6873 .data = &thermal_driver_data,
6874 },
6875 {
6876 .data = &ecdump_driver_data,
6877 },
6878 {
6879 .init = brightness_init,
6880 .data = &brightness_driver_data,
6881 },
6882 {
6883 .data = &volume_driver_data,
6884 },
6885 {
6886 .init = fan_init,
6887 .data = &fan_driver_data,
6888 },
6889 };
6890
6891 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6892 {
6893 unsigned int i;
6894 struct ibm_struct *ibm;
6895
6896 if (!kp || !kp->name || !val)
6897 return -EINVAL;
6898
6899 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6900 ibm = ibms_init[i].data;
6901 WARN_ON(ibm == NULL);
6902
6903 if (!ibm || !ibm->name)
6904 continue;
6905
6906 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6907 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6908 return -ENOSPC;
6909 strcpy(ibms_init[i].param, val);
6910 strcat(ibms_init[i].param, ",");
6911 return 0;
6912 }
6913 }
6914
6915 return -EINVAL;
6916 }
6917
6918 module_param(experimental, int, 0);
6919 MODULE_PARM_DESC(experimental,
6920 "Enables experimental features when non-zero");
6921
6922 module_param_named(debug, dbg_level, uint, 0);
6923 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6924
6925 module_param(force_load, bool, 0);
6926 MODULE_PARM_DESC(force_load,
6927 "Attempts to load the driver even on a "
6928 "mis-identified ThinkPad when true");
6929
6930 module_param_named(fan_control, fan_control_allowed, bool, 0);
6931 MODULE_PARM_DESC(fan_control,
6932 "Enables setting fan parameters features when true");
6933
6934 module_param_named(brightness_mode, brightness_mode, int, 0);
6935 MODULE_PARM_DESC(brightness_mode,
6936 "Selects brightness control strategy: "
6937 "0=auto, 1=EC, 2=CMOS, 3=both");
6938
6939 module_param(brightness_enable, uint, 0);
6940 MODULE_PARM_DESC(brightness_enable,
6941 "Enables backlight control when 1, disables when 0");
6942
6943 module_param(hotkey_report_mode, uint, 0);
6944 MODULE_PARM_DESC(hotkey_report_mode,
6945 "used for backwards compatibility with userspace, "
6946 "see documentation");
6947
6948 #define TPACPI_PARAM(feature) \
6949 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6950 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6951 "at module load, see documentation")
6952
6953 TPACPI_PARAM(hotkey);
6954 TPACPI_PARAM(bluetooth);
6955 TPACPI_PARAM(video);
6956 TPACPI_PARAM(light);
6957 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6958 TPACPI_PARAM(dock);
6959 #endif
6960 #ifdef CONFIG_THINKPAD_ACPI_BAY
6961 TPACPI_PARAM(bay);
6962 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6963 TPACPI_PARAM(cmos);
6964 TPACPI_PARAM(led);
6965 TPACPI_PARAM(beep);
6966 TPACPI_PARAM(ecdump);
6967 TPACPI_PARAM(brightness);
6968 TPACPI_PARAM(volume);
6969 TPACPI_PARAM(fan);
6970
6971 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
6972 module_param(dbg_wlswemul, uint, 0);
6973 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
6974 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
6975 MODULE_PARM_DESC(wlsw_state,
6976 "Initial state of the emulated WLSW switch");
6977
6978 module_param(dbg_bluetoothemul, uint, 0);
6979 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
6980 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
6981 MODULE_PARM_DESC(bluetooth_state,
6982 "Initial state of the emulated bluetooth switch");
6983
6984 module_param(dbg_wwanemul, uint, 0);
6985 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
6986 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
6987 MODULE_PARM_DESC(wwan_state,
6988 "Initial state of the emulated WWAN switch");
6989 #endif
6990
6991 static void thinkpad_acpi_module_exit(void)
6992 {
6993 struct ibm_struct *ibm, *itmp;
6994
6995 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6996
6997 list_for_each_entry_safe_reverse(ibm, itmp,
6998 &tpacpi_all_drivers,
6999 all_drivers) {
7000 ibm_exit(ibm);
7001 }
7002
7003 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7004
7005 if (tpacpi_inputdev) {
7006 if (tp_features.input_device_registered)
7007 input_unregister_device(tpacpi_inputdev);
7008 else
7009 input_free_device(tpacpi_inputdev);
7010 }
7011
7012 if (tpacpi_hwmon)
7013 hwmon_device_unregister(tpacpi_hwmon);
7014
7015 if (tp_features.sensors_pdev_attrs_registered)
7016 device_remove_file(&tpacpi_sensors_pdev->dev,
7017 &dev_attr_thinkpad_acpi_pdev_name);
7018 if (tpacpi_sensors_pdev)
7019 platform_device_unregister(tpacpi_sensors_pdev);
7020 if (tpacpi_pdev)
7021 platform_device_unregister(tpacpi_pdev);
7022
7023 if (tp_features.sensors_pdrv_attrs_registered)
7024 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7025 if (tp_features.platform_drv_attrs_registered)
7026 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7027
7028 if (tp_features.sensors_pdrv_registered)
7029 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7030
7031 if (tp_features.platform_drv_registered)
7032 platform_driver_unregister(&tpacpi_pdriver);
7033
7034 if (proc_dir)
7035 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7036
7037 if (tpacpi_wq)
7038 destroy_workqueue(tpacpi_wq);
7039
7040 kfree(thinkpad_id.bios_version_str);
7041 kfree(thinkpad_id.ec_version_str);
7042 kfree(thinkpad_id.model_str);
7043 }
7044
7045
7046 static int __init thinkpad_acpi_module_init(void)
7047 {
7048 int ret, i;
7049
7050 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7051
7052 /* Parameter checking */
7053 if (hotkey_report_mode > 2)
7054 return -EINVAL;
7055
7056 /* Driver-level probe */
7057
7058 ret = get_thinkpad_model_data(&thinkpad_id);
7059 if (ret) {
7060 printk(TPACPI_ERR
7061 "unable to get DMI data: %d\n", ret);
7062 thinkpad_acpi_module_exit();
7063 return ret;
7064 }
7065 ret = probe_for_thinkpad();
7066 if (ret) {
7067 thinkpad_acpi_module_exit();
7068 return ret;
7069 }
7070
7071 /* Driver initialization */
7072
7073 TPACPI_ACPIHANDLE_INIT(ecrd);
7074 TPACPI_ACPIHANDLE_INIT(ecwr);
7075
7076 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7077 if (!tpacpi_wq) {
7078 thinkpad_acpi_module_exit();
7079 return -ENOMEM;
7080 }
7081
7082 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7083 if (!proc_dir) {
7084 printk(TPACPI_ERR
7085 "unable to create proc dir " TPACPI_PROC_DIR);
7086 thinkpad_acpi_module_exit();
7087 return -ENODEV;
7088 }
7089 proc_dir->owner = THIS_MODULE;
7090
7091 ret = platform_driver_register(&tpacpi_pdriver);
7092 if (ret) {
7093 printk(TPACPI_ERR
7094 "unable to register main platform driver\n");
7095 thinkpad_acpi_module_exit();
7096 return ret;
7097 }
7098 tp_features.platform_drv_registered = 1;
7099
7100 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7101 if (ret) {
7102 printk(TPACPI_ERR
7103 "unable to register hwmon platform driver\n");
7104 thinkpad_acpi_module_exit();
7105 return ret;
7106 }
7107 tp_features.sensors_pdrv_registered = 1;
7108
7109 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7110 if (!ret) {
7111 tp_features.platform_drv_attrs_registered = 1;
7112 ret = tpacpi_create_driver_attributes(
7113 &tpacpi_hwmon_pdriver.driver);
7114 }
7115 if (ret) {
7116 printk(TPACPI_ERR
7117 "unable to create sysfs driver attributes\n");
7118 thinkpad_acpi_module_exit();
7119 return ret;
7120 }
7121 tp_features.sensors_pdrv_attrs_registered = 1;
7122
7123
7124 /* Device initialization */
7125 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7126 NULL, 0);
7127 if (IS_ERR(tpacpi_pdev)) {
7128 ret = PTR_ERR(tpacpi_pdev);
7129 tpacpi_pdev = NULL;
7130 printk(TPACPI_ERR "unable to register platform device\n");
7131 thinkpad_acpi_module_exit();
7132 return ret;
7133 }
7134 tpacpi_sensors_pdev = platform_device_register_simple(
7135 TPACPI_HWMON_DRVR_NAME,
7136 -1, NULL, 0);
7137 if (IS_ERR(tpacpi_sensors_pdev)) {
7138 ret = PTR_ERR(tpacpi_sensors_pdev);
7139 tpacpi_sensors_pdev = NULL;
7140 printk(TPACPI_ERR
7141 "unable to register hwmon platform device\n");
7142 thinkpad_acpi_module_exit();
7143 return ret;
7144 }
7145 ret = device_create_file(&tpacpi_sensors_pdev->dev,
7146 &dev_attr_thinkpad_acpi_pdev_name);
7147 if (ret) {
7148 printk(TPACPI_ERR
7149 "unable to create sysfs hwmon device attributes\n");
7150 thinkpad_acpi_module_exit();
7151 return ret;
7152 }
7153 tp_features.sensors_pdev_attrs_registered = 1;
7154 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7155 if (IS_ERR(tpacpi_hwmon)) {
7156 ret = PTR_ERR(tpacpi_hwmon);
7157 tpacpi_hwmon = NULL;
7158 printk(TPACPI_ERR "unable to register hwmon device\n");
7159 thinkpad_acpi_module_exit();
7160 return ret;
7161 }
7162 mutex_init(&tpacpi_inputdev_send_mutex);
7163 tpacpi_inputdev = input_allocate_device();
7164 if (!tpacpi_inputdev) {
7165 printk(TPACPI_ERR "unable to allocate input device\n");
7166 thinkpad_acpi_module_exit();
7167 return -ENOMEM;
7168 } else {
7169 /* Prepare input device, but don't register */
7170 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7171 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7172 tpacpi_inputdev->id.bustype = BUS_HOST;
7173 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7174 thinkpad_id.vendor :
7175 PCI_VENDOR_ID_IBM;
7176 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7177 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7178 }
7179 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7180 ret = ibm_init(&ibms_init[i]);
7181 if (ret >= 0 && *ibms_init[i].param)
7182 ret = ibms_init[i].data->write(ibms_init[i].param);
7183 if (ret < 0) {
7184 thinkpad_acpi_module_exit();
7185 return ret;
7186 }
7187 }
7188 ret = input_register_device(tpacpi_inputdev);
7189 if (ret < 0) {
7190 printk(TPACPI_ERR "unable to register input device\n");
7191 thinkpad_acpi_module_exit();
7192 return ret;
7193 } else {
7194 tp_features.input_device_registered = 1;
7195 }
7196
7197 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7198 return 0;
7199 }
7200
7201 /* Please remove this in year 2009 */
7202 MODULE_ALIAS("ibm_acpi");
7203
7204 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7205
7206 /*
7207 * DMI matching for module autoloading
7208 *
7209 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7210 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7211 *
7212 * Only models listed in thinkwiki will be supported, so add yours
7213 * if it is not there yet.
7214 */
7215 #define IBM_BIOS_MODULE_ALIAS(__type) \
7216 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
7217
7218 /* Non-ancient thinkpads */
7219 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7220 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7221
7222 /* Ancient thinkpad BIOSes have to be identified by
7223 * BIOS type or model number, and there are far less
7224 * BIOS types than model numbers... */
7225 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
7226 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
7227 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
7228
7229 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7230 MODULE_DESCRIPTION(TPACPI_DESC);
7231 MODULE_VERSION(TPACPI_VERSION);
7232 MODULE_LICENSE("GPL");
7233
7234 module_init(thinkpad_acpi_module_init);
7235 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree