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ACPI: thinkpad-acpi: add development version tag
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / platform / x86 / thinkpad_acpi.c
blobe387e70294f97e4fef982c5a01f5fa7b527f6d22
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define TPACPI_VERSION "0.22-20090417"
25 #define TPACPI_SYSFS_VERSION 0x020300
26
27 /*
28 * Changelog:
29 * 2007-10-20 changelog trimmed down
30 *
31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
32 * drivers/misc.
33 *
34 * 2006-11-22 0.13 new maintainer
35 * changelog now lives in git commit history, and will
36 * not be updated further in-file.
37 *
38 * 2005-03-17 0.11 support for 600e, 770x
39 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
40 *
41 * 2005-01-16 0.9 use MODULE_VERSION
42 * thanks to Henrik Brix Andersen <brix@gentoo.org>
43 * fix parameter passing on module loading
44 * thanks to Rusty Russell <rusty@rustcorp.com.au>
45 * thanks to Jim Radford <radford@blackbean.org>
46 * 2004-11-08 0.8 fix init error case, don't return from a macro
47 * thanks to Chris Wright <chrisw@osdl.org>
48 */
49
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/types.h>
54 #include <linux/string.h>
55 #include <linux/list.h>
56 #include <linux/mutex.h>
57 #include <linux/sched.h>
58 #include <linux/kthread.h>
59 #include <linux/freezer.h>
60 #include <linux/delay.h>
61
62 #include <linux/nvram.h>
63 #include <linux/proc_fs.h>
64 #include <linux/sysfs.h>
65 #include <linux/backlight.h>
66 #include <linux/fb.h>
67 #include <linux/platform_device.h>
68 #include <linux/hwmon.h>
69 #include <linux/hwmon-sysfs.h>
70 #include <linux/input.h>
71 #include <linux/leds.h>
72 #include <linux/rfkill.h>
73 #include <asm/uaccess.h>
74
75 #include <linux/dmi.h>
76 #include <linux/jiffies.h>
77 #include <linux/workqueue.h>
78
79 #include <acpi/acpi_drivers.h>
80
81 #include <linux/pci_ids.h>
82
83
84 /* ThinkPad CMOS commands */
85 #define TP_CMOS_VOLUME_DOWN 0
86 #define TP_CMOS_VOLUME_UP 1
87 #define TP_CMOS_VOLUME_MUTE 2
88 #define TP_CMOS_BRIGHTNESS_UP 4
89 #define TP_CMOS_BRIGHTNESS_DOWN 5
90 #define TP_CMOS_THINKLIGHT_ON 12
91 #define TP_CMOS_THINKLIGHT_OFF 13
92
93 /* NVRAM Addresses */
94 enum tp_nvram_addr {
95 TP_NVRAM_ADDR_HK2 = 0x57,
96 TP_NVRAM_ADDR_THINKLIGHT = 0x58,
97 TP_NVRAM_ADDR_VIDEO = 0x59,
98 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
99 TP_NVRAM_ADDR_MIXER = 0x60,
100 };
101
102 /* NVRAM bit masks */
103 enum {
104 TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
105 TP_NVRAM_MASK_HKT_ZOOM = 0x20,
106 TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
107 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
108 TP_NVRAM_MASK_THINKLIGHT = 0x10,
109 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
110 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
111 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
112 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
113 TP_NVRAM_MASK_MUTE = 0x40,
114 TP_NVRAM_MASK_HKT_VOLUME = 0x80,
115 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
116 TP_NVRAM_POS_LEVEL_VOLUME = 0,
117 };
118
119 /* ACPI HIDs */
120 #define TPACPI_ACPI_HKEY_HID "IBM0068"
121
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION 0x4101
125
126 /* ACPI \WGSV commands */
127 enum {
128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */
129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */
130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */
131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */
132 };
133
134 /* TP_ACPI_WGSV_GET_STATE bits */
135 enum {
136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */
137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */
138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */
139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */
140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */
141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */
142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */
143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */
144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */
145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */
146 };
147
148 /****************************************************************************
149 * Main driver
150 */
151
152 #define TPACPI_NAME "thinkpad"
153 #define TPACPI_DESC "ThinkPad ACPI Extras"
154 #define TPACPI_FILE TPACPI_NAME "_acpi"
155 #define TPACPI_URL "http://ibm-acpi.sf.net/"
156 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
157
158 #define TPACPI_PROC_DIR "ibm"
159 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
160 #define TPACPI_DRVR_NAME TPACPI_FILE
161 #define TPACPI_DRVR_SHORTNAME "tpacpi"
162 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
163
164 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
165 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
166
167 #define TPACPI_MAX_ACPI_ARGS 3
168
169 /* rfkill switches */
170 enum {
171 TPACPI_RFK_BLUETOOTH_SW_ID = 0,
172 TPACPI_RFK_WWAN_SW_ID,
173 TPACPI_RFK_UWB_SW_ID,
174 };
175
176 /* printk headers */
177 #define TPACPI_LOG TPACPI_FILE ": "
178 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG
179 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG
180 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG
181 #define TPACPI_ERR KERN_ERR TPACPI_LOG
182 #define TPACPI_WARN KERN_WARNING TPACPI_LOG
183 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
184 #define TPACPI_INFO KERN_INFO TPACPI_LOG
185 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
186
187 /* Debugging printk groups */
188 #define TPACPI_DBG_ALL 0xffff
189 #define TPACPI_DBG_DISCLOSETASK 0x8000
190 #define TPACPI_DBG_INIT 0x0001
191 #define TPACPI_DBG_EXIT 0x0002
192 #define TPACPI_DBG_RFKILL 0x0004
193 #define TPACPI_DBG_HKEY 0x0008
194 #define TPACPI_DBG_FAN 0x0010
195 #define TPACPI_DBG_BRGHT 0x0020
196
197 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
198 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
199 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
200
201
202 /****************************************************************************
203 * Driver-wide structs and misc. variables
204 */
205
206 struct ibm_struct;
207
208 struct tp_acpi_drv_struct {
209 const struct acpi_device_id *hid;
210 struct acpi_driver *driver;
211
212 void (*notify) (struct ibm_struct *, u32);
213 acpi_handle *handle;
214 u32 type;
215 struct acpi_device *device;
216 };
217
218 struct ibm_struct {
219 char *name;
220
221 int (*read) (char *);
222 int (*write) (char *);
223 void (*exit) (void);
224 void (*resume) (void);
225 void (*suspend) (pm_message_t state);
226 void (*shutdown) (void);
227
228 struct list_head all_drivers;
229
230 struct tp_acpi_drv_struct *acpi;
231
232 struct {
233 u8 acpi_driver_registered:1;
234 u8 acpi_notify_installed:1;
235 u8 proc_created:1;
236 u8 init_called:1;
237 u8 experimental:1;
238 } flags;
239 };
240
241 struct ibm_init_struct {
242 char param[32];
243
244 int (*init) (struct ibm_init_struct *);
245 struct ibm_struct *data;
246 };
247
248 static struct {
249 #ifdef CONFIG_THINKPAD_ACPI_BAY
250 u32 bay_status:1;
251 u32 bay_eject:1;
252 u32 bay_status2:1;
253 u32 bay_eject2:1;
254 #endif
255 u32 bluetooth:1;
256 u32 hotkey:1;
257 u32 hotkey_mask:1;
258 u32 hotkey_wlsw:1;
259 u32 hotkey_tablet:1;
260 u32 light:1;
261 u32 light_status:1;
262 u32 bright_16levels:1;
263 u32 bright_acpimode:1;
264 u32 wan:1;
265 u32 uwb:1;
266 u32 fan_ctrl_status_undef:1;
267 u32 input_device_registered:1;
268 u32 platform_drv_registered:1;
269 u32 platform_drv_attrs_registered:1;
270 u32 sensors_pdrv_registered:1;
271 u32 sensors_pdrv_attrs_registered:1;
272 u32 sensors_pdev_attrs_registered:1;
273 u32 hotkey_poll_active:1;
274 } tp_features;
275
276 static struct {
277 u16 hotkey_mask_ff:1;
278 } tp_warned;
279
280 struct thinkpad_id_data {
281 unsigned int vendor; /* ThinkPad vendor:
282 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
283
284 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
285 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
286
287 u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
288 u16 ec_model;
289
290 char *model_str; /* ThinkPad T43 */
291 char *nummodel_str; /* 9384A9C for a 9384-A9C model */
292 };
293 static struct thinkpad_id_data thinkpad_id;
294
295 static enum {
296 TPACPI_LIFE_INIT = 0,
297 TPACPI_LIFE_RUNNING,
298 TPACPI_LIFE_EXITING,
299 } tpacpi_lifecycle;
300
301 static int experimental;
302 static u32 dbg_level;
303
304 static struct workqueue_struct *tpacpi_wq;
305
306 /* Special LED class that can defer work */
307 struct tpacpi_led_classdev {
308 struct led_classdev led_classdev;
309 struct work_struct work;
310 enum led_brightness new_brightness;
311 unsigned int led;
312 };
313
314 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
315 static int dbg_wlswemul;
316 static int tpacpi_wlsw_emulstate;
317 static int dbg_bluetoothemul;
318 static int tpacpi_bluetooth_emulstate;
319 static int dbg_wwanemul;
320 static int tpacpi_wwan_emulstate;
321 static int dbg_uwbemul;
322 static int tpacpi_uwb_emulstate;
323 #endif
324
325
326 /*************************************************************************
327 * Debugging helpers
328 */
329
330 #define dbg_printk(a_dbg_level, format, arg...) \
331 do { if (dbg_level & (a_dbg_level)) \
332 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
333 } while (0)
334
335 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
336 #define vdbg_printk dbg_printk
337 static const char *str_supported(int is_supported);
338 #else
339 #define vdbg_printk(a_dbg_level, format, arg...) \
340 do { } while (0)
341 #endif
342
343 static void tpacpi_log_usertask(const char * const what)
344 {
345 printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
346 what, task_tgid_vnr(current));
347 }
348
349 #define tpacpi_disclose_usertask(what, format, arg...) \
350 do { \
351 if (unlikely( \
352 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
353 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
354 printk(TPACPI_DEBUG "%s: PID %d: " format, \
355 what, task_tgid_vnr(current), ## arg); \
356 } \
357 } while (0)
358
359 /****************************************************************************
360 ****************************************************************************
361 *
362 * ACPI Helpers and device model
363 *
364 ****************************************************************************
365 ****************************************************************************/
366
367 /*************************************************************************
368 * ACPI basic handles
369 */
370
371 static acpi_handle root_handle;
372
373 #define TPACPI_HANDLE(object, parent, paths...) \
374 static acpi_handle object##_handle; \
375 static acpi_handle *object##_parent = &parent##_handle; \
376 static char *object##_path; \
377 static char *object##_paths[] = { paths }
378
379 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
380 "\\_SB.PCI.ISA.EC", /* 570 */
381 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
382 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
383 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
384 "\\_SB.PCI0.ICH3.EC0", /* R31 */
385 "\\_SB.PCI0.LPC.EC", /* all others */
386 );
387
388 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
389 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
390
391 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */
392 /* T4x, X31, X40 */
393 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
394 "\\CMS", /* R40, R40e */
395 ); /* all others */
396
397 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
398 "^HKEY", /* R30, R31 */
399 "HKEY", /* all others */
400 ); /* 570 */
401
402 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
403 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
404 "\\_SB.PCI0.VID0", /* 770e */
405 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
406 "\\_SB.PCI0.AGP.VID", /* all others */
407 ); /* R30, R31 */
408
409
410 /*************************************************************************
411 * ACPI helpers
412 */
413
414 static int acpi_evalf(acpi_handle handle,
415 void *res, char *method, char *fmt, ...)
416 {
417 char *fmt0 = fmt;
418 struct acpi_object_list params;
419 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
420 struct acpi_buffer result, *resultp;
421 union acpi_object out_obj;
422 acpi_status status;
423 va_list ap;
424 char res_type;
425 int success;
426 int quiet;
427
428 if (!*fmt) {
429 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
430 return 0;
431 }
432
433 if (*fmt == 'q') {
434 quiet = 1;
435 fmt++;
436 } else
437 quiet = 0;
438
439 res_type = *(fmt++);
440
441 params.count = 0;
442 params.pointer = &in_objs[0];
443
444 va_start(ap, fmt);
445 while (*fmt) {
446 char c = *(fmt++);
447 switch (c) {
448 case 'd': /* int */
449 in_objs[params.count].integer.value = va_arg(ap, int);
450 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
451 break;
452 /* add more types as needed */
453 default:
454 printk(TPACPI_ERR "acpi_evalf() called "
455 "with invalid format character '%c'\n", c);
456 return 0;
457 }
458 }
459 va_end(ap);
460
461 if (res_type != 'v') {
462 result.length = sizeof(out_obj);
463 result.pointer = &out_obj;
464 resultp = &result;
465 } else
466 resultp = NULL;
467
468 status = acpi_evaluate_object(handle, method, &params, resultp);
469
470 switch (res_type) {
471 case 'd': /* int */
472 if (res)
473 *(int *)res = out_obj.integer.value;
474 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
475 break;
476 case 'v': /* void */
477 success = status == AE_OK;
478 break;
479 /* add more types as needed */
480 default:
481 printk(TPACPI_ERR "acpi_evalf() called "
482 "with invalid format character '%c'\n", res_type);
483 return 0;
484 }
485
486 if (!success && !quiet)
487 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
488 method, fmt0, status);
489
490 return success;
491 }
492
493 static int acpi_ec_read(int i, u8 *p)
494 {
495 int v;
496
497 if (ecrd_handle) {
498 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
499 return 0;
500 *p = v;
501 } else {
502 if (ec_read(i, p) < 0)
503 return 0;
504 }
505
506 return 1;
507 }
508
509 static int acpi_ec_write(int i, u8 v)
510 {
511 if (ecwr_handle) {
512 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
513 return 0;
514 } else {
515 if (ec_write(i, v) < 0)
516 return 0;
517 }
518
519 return 1;
520 }
521
522 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
523 static int _sta(acpi_handle handle)
524 {
525 int status;
526
527 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
528 status = 0;
529
530 return status;
531 }
532 #endif
533
534 static int issue_thinkpad_cmos_command(int cmos_cmd)
535 {
536 if (!cmos_handle)
537 return -ENXIO;
538
539 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
540 return -EIO;
541
542 return 0;
543 }
544
545 /*************************************************************************
546 * ACPI device model
547 */
548
549 #define TPACPI_ACPIHANDLE_INIT(object) \
550 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
551 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
552
553 static void drv_acpi_handle_init(char *name,
554 acpi_handle *handle, acpi_handle parent,
555 char **paths, int num_paths, char **path)
556 {
557 int i;
558 acpi_status status;
559
560 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
561 name);
562
563 for (i = 0; i < num_paths; i++) {
564 status = acpi_get_handle(parent, paths[i], handle);
565 if (ACPI_SUCCESS(status)) {
566 *path = paths[i];
567 dbg_printk(TPACPI_DBG_INIT,
568 "Found ACPI handle %s for %s\n",
569 *path, name);
570 return;
571 }
572 }
573
574 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
575 name);
576 *handle = NULL;
577 }
578
579 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
580 {
581 struct ibm_struct *ibm = data;
582
583 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
584 return;
585
586 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
587 return;
588
589 ibm->acpi->notify(ibm, event);
590 }
591
592 static int __init setup_acpi_notify(struct ibm_struct *ibm)
593 {
594 acpi_status status;
595 int rc;
596
597 BUG_ON(!ibm->acpi);
598
599 if (!*ibm->acpi->handle)
600 return 0;
601
602 vdbg_printk(TPACPI_DBG_INIT,
603 "setting up ACPI notify for %s\n", ibm->name);
604
605 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
606 if (rc < 0) {
607 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
608 ibm->name, rc);
609 return -ENODEV;
610 }
611
612 acpi_driver_data(ibm->acpi->device) = ibm;
613 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
614 TPACPI_ACPI_EVENT_PREFIX,
615 ibm->name);
616
617 status = acpi_install_notify_handler(*ibm->acpi->handle,
618 ibm->acpi->type, dispatch_acpi_notify, ibm);
619 if (ACPI_FAILURE(status)) {
620 if (status == AE_ALREADY_EXISTS) {
621 printk(TPACPI_NOTICE
622 "another device driver is already "
623 "handling %s events\n", ibm->name);
624 } else {
625 printk(TPACPI_ERR
626 "acpi_install_notify_handler(%s) failed: %d\n",
627 ibm->name, status);
628 }
629 return -ENODEV;
630 }
631 ibm->flags.acpi_notify_installed = 1;
632 return 0;
633 }
634
635 static int __init tpacpi_device_add(struct acpi_device *device)
636 {
637 return 0;
638 }
639
640 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
641 {
642 int rc;
643
644 dbg_printk(TPACPI_DBG_INIT,
645 "registering %s as an ACPI driver\n", ibm->name);
646
647 BUG_ON(!ibm->acpi);
648
649 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
650 if (!ibm->acpi->driver) {
651 printk(TPACPI_ERR
652 "failed to allocate memory for ibm->acpi->driver\n");
653 return -ENOMEM;
654 }
655
656 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
657 ibm->acpi->driver->ids = ibm->acpi->hid;
658
659 ibm->acpi->driver->ops.add = &tpacpi_device_add;
660
661 rc = acpi_bus_register_driver(ibm->acpi->driver);
662 if (rc < 0) {
663 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
664 ibm->name, rc);
665 kfree(ibm->acpi->driver);
666 ibm->acpi->driver = NULL;
667 } else if (!rc)
668 ibm->flags.acpi_driver_registered = 1;
669
670 return rc;
671 }
672
673
674 /****************************************************************************
675 ****************************************************************************
676 *
677 * Procfs Helpers
678 *
679 ****************************************************************************
680 ****************************************************************************/
681
682 static int dispatch_procfs_read(char *page, char **start, off_t off,
683 int count, int *eof, void *data)
684 {
685 struct ibm_struct *ibm = data;
686 int len;
687
688 if (!ibm || !ibm->read)
689 return -EINVAL;
690
691 len = ibm->read(page);
692 if (len < 0)
693 return len;
694
695 if (len <= off + count)
696 *eof = 1;
697 *start = page + off;
698 len -= off;
699 if (len > count)
700 len = count;
701 if (len < 0)
702 len = 0;
703
704 return len;
705 }
706
707 static int dispatch_procfs_write(struct file *file,
708 const char __user *userbuf,
709 unsigned long count, void *data)
710 {
711 struct ibm_struct *ibm = data;
712 char *kernbuf;
713 int ret;
714
715 if (!ibm || !ibm->write)
716 return -EINVAL;
717
718 kernbuf = kmalloc(count + 2, GFP_KERNEL);
719 if (!kernbuf)
720 return -ENOMEM;
721
722 if (copy_from_user(kernbuf, userbuf, count)) {
723 kfree(kernbuf);
724 return -EFAULT;
725 }
726
727 kernbuf[count] = 0;
728 strcat(kernbuf, ",");
729 ret = ibm->write(kernbuf);
730 if (ret == 0)
731 ret = count;
732
733 kfree(kernbuf);
734
735 return ret;
736 }
737
738 static char *next_cmd(char **cmds)
739 {
740 char *start = *cmds;
741 char *end;
742
743 while ((end = strchr(start, ',')) && end == start)
744 start = end + 1;
745
746 if (!end)
747 return NULL;
748
749 *end = 0;
750 *cmds = end + 1;
751 return start;
752 }
753
754
755 /****************************************************************************
756 ****************************************************************************
757 *
758 * Device model: input, hwmon and platform
759 *
760 ****************************************************************************
761 ****************************************************************************/
762
763 static struct platform_device *tpacpi_pdev;
764 static struct platform_device *tpacpi_sensors_pdev;
765 static struct device *tpacpi_hwmon;
766 static struct input_dev *tpacpi_inputdev;
767 static struct mutex tpacpi_inputdev_send_mutex;
768 static LIST_HEAD(tpacpi_all_drivers);
769
770 static int tpacpi_suspend_handler(struct platform_device *pdev,
771 pm_message_t state)
772 {
773 struct ibm_struct *ibm, *itmp;
774
775 list_for_each_entry_safe(ibm, itmp,
776 &tpacpi_all_drivers,
777 all_drivers) {
778 if (ibm->suspend)
779 (ibm->suspend)(state);
780 }
781
782 return 0;
783 }
784
785 static int tpacpi_resume_handler(struct platform_device *pdev)
786 {
787 struct ibm_struct *ibm, *itmp;
788
789 list_for_each_entry_safe(ibm, itmp,
790 &tpacpi_all_drivers,
791 all_drivers) {
792 if (ibm->resume)
793 (ibm->resume)();
794 }
795
796 return 0;
797 }
798
799 static void tpacpi_shutdown_handler(struct platform_device *pdev)
800 {
801 struct ibm_struct *ibm, *itmp;
802
803 list_for_each_entry_safe(ibm, itmp,
804 &tpacpi_all_drivers,
805 all_drivers) {
806 if (ibm->shutdown)
807 (ibm->shutdown)();
808 }
809 }
810
811 static struct platform_driver tpacpi_pdriver = {
812 .driver = {
813 .name = TPACPI_DRVR_NAME,
814 .owner = THIS_MODULE,
815 },
816 .suspend = tpacpi_suspend_handler,
817 .resume = tpacpi_resume_handler,
818 .shutdown = tpacpi_shutdown_handler,
819 };
820
821 static struct platform_driver tpacpi_hwmon_pdriver = {
822 .driver = {
823 .name = TPACPI_HWMON_DRVR_NAME,
824 .owner = THIS_MODULE,
825 },
826 };
827
828 /*************************************************************************
829 * sysfs support helpers
830 */
831
832 struct attribute_set {
833 unsigned int members, max_members;
834 struct attribute_group group;
835 };
836
837 struct attribute_set_obj {
838 struct attribute_set s;
839 struct attribute *a;
840 } __attribute__((packed));
841
842 static struct attribute_set *create_attr_set(unsigned int max_members,
843 const char *name)
844 {
845 struct attribute_set_obj *sobj;
846
847 if (max_members == 0)
848 return NULL;
849
850 /* Allocates space for implicit NULL at the end too */
851 sobj = kzalloc(sizeof(struct attribute_set_obj) +
852 max_members * sizeof(struct attribute *),
853 GFP_KERNEL);
854 if (!sobj)
855 return NULL;
856 sobj->s.max_members = max_members;
857 sobj->s.group.attrs = &sobj->a;
858 sobj->s.group.name = name;
859
860 return &sobj->s;
861 }
862
863 #define destroy_attr_set(_set) \
864 kfree(_set);
865
866 /* not multi-threaded safe, use it in a single thread per set */
867 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
868 {
869 if (!s || !attr)
870 return -EINVAL;
871
872 if (s->members >= s->max_members)
873 return -ENOMEM;
874
875 s->group.attrs[s->members] = attr;
876 s->members++;
877
878 return 0;
879 }
880
881 static int add_many_to_attr_set(struct attribute_set *s,
882 struct attribute **attr,
883 unsigned int count)
884 {
885 int i, res;
886
887 for (i = 0; i < count; i++) {
888 res = add_to_attr_set(s, attr[i]);
889 if (res)
890 return res;
891 }
892
893 return 0;
894 }
895
896 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
897 {
898 sysfs_remove_group(kobj, &s->group);
899 destroy_attr_set(s);
900 }
901
902 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
903 sysfs_create_group(_kobj, &_attr_set->group)
904
905 static int parse_strtoul(const char *buf,
906 unsigned long max, unsigned long *value)
907 {
908 char *endp;
909
910 while (*buf && isspace(*buf))
911 buf++;
912 *value = simple_strtoul(buf, &endp, 0);
913 while (*endp && isspace(*endp))
914 endp++;
915 if (*endp || *value > max)
916 return -EINVAL;
917
918 return 0;
919 }
920
921 static void tpacpi_disable_brightness_delay(void)
922 {
923 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
924 printk(TPACPI_NOTICE
925 "ACPI backlight control delay disabled\n");
926 }
927
928 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
929 {
930 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
931 union acpi_object *obj;
932 int rc;
933
934 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
935 obj = (union acpi_object *)buffer.pointer;
936 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
937 printk(TPACPI_ERR "Unknown _BCL data, "
938 "please report this to %s\n", TPACPI_MAIL);
939 rc = 0;
940 } else {
941 rc = obj->package.count;
942 }
943 } else {
944 return 0;
945 }
946
947 kfree(buffer.pointer);
948 return rc;
949 }
950
951 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
952 u32 lvl, void *context, void **rv)
953 {
954 char name[ACPI_PATH_SEGMENT_LENGTH];
955 struct acpi_buffer buffer = { sizeof(name), &name };
956
957 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
958 !strncmp("_BCL", name, sizeof(name) - 1)) {
959 BUG_ON(!rv || !*rv);
960 **(int **)rv = tpacpi_query_bcl_levels(handle);
961 return AE_CTRL_TERMINATE;
962 } else {
963 return AE_OK;
964 }
965 }
966
967 /*
968 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
969 */
970 static int __init tpacpi_check_std_acpi_brightness_support(void)
971 {
972 int status;
973 int bcl_levels = 0;
974 void *bcl_ptr = &bcl_levels;
975
976 if (!vid_handle) {
977 TPACPI_ACPIHANDLE_INIT(vid);
978 }
979 if (!vid_handle)
980 return 0;
981
982 /*
983 * Search for a _BCL method, and execute it. This is safe on all
984 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
985 * BIOS in ACPI backlight control mode. We do NOT have to care
986 * about calling the _BCL method in an enabled video device, any
987 * will do for our purposes.
988 */
989
990 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
991 tpacpi_acpi_walk_find_bcl, NULL,
992 &bcl_ptr);
993
994 if (ACPI_SUCCESS(status) && bcl_levels > 2) {
995 tp_features.bright_acpimode = 1;
996 return (bcl_levels - 2);
997 }
998
999 return 0;
1000 }
1001
1002 static int __init tpacpi_new_rfkill(const unsigned int id,
1003 struct rfkill **rfk,
1004 const enum rfkill_type rfktype,
1005 const char *name,
1006 const bool set_default,
1007 int (*toggle_radio)(void *, enum rfkill_state),
1008 int (*get_state)(void *, enum rfkill_state *))
1009 {
1010 int res;
1011 enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
1012
1013 res = get_state(NULL, &initial_state);
1014 if (res < 0) {
1015 printk(TPACPI_ERR
1016 "failed to read initial state for %s, error %d; "
1017 "will turn radio off\n", name, res);
1018 } else if (set_default) {
1019 /* try to set the initial state as the default for the rfkill
1020 * type, since we ask the firmware to preserve it across S5 in
1021 * NVRAM */
1022 if (rfkill_set_default(rfktype,
1023 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1024 RFKILL_STATE_UNBLOCKED :
1025 RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
1026 vdbg_printk(TPACPI_DBG_RFKILL,
1027 "Default state for %s cannot be changed\n",
1028 name);
1029 }
1030
1031 *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1032 if (!*rfk) {
1033 printk(TPACPI_ERR
1034 "failed to allocate memory for rfkill class\n");
1035 return -ENOMEM;
1036 }
1037
1038 (*rfk)->name = name;
1039 (*rfk)->get_state = get_state;
1040 (*rfk)->toggle_radio = toggle_radio;
1041 (*rfk)->state = initial_state;
1042
1043 res = rfkill_register(*rfk);
1044 if (res < 0) {
1045 printk(TPACPI_ERR
1046 "failed to register %s rfkill switch: %d\n",
1047 name, res);
1048 rfkill_free(*rfk);
1049 *rfk = NULL;
1050 return res;
1051 }
1052
1053 return 0;
1054 }
1055
1056 static void printk_deprecated_attribute(const char * const what,
1057 const char * const details)
1058 {
1059 tpacpi_log_usertask("deprecated sysfs attribute");
1060 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1061 "will be removed. %s\n",
1062 what, details);
1063 }
1064
1065 static void printk_deprecated_rfkill_attribute(const char * const what)
1066 {
1067 printk_deprecated_attribute(what,
1068 "Please switch to generic rfkill before year 2010");
1069 }
1070
1071 /*************************************************************************
1072 * thinkpad-acpi driver attributes
1073 */
1074
1075 /* interface_version --------------------------------------------------- */
1076 static ssize_t tpacpi_driver_interface_version_show(
1077 struct device_driver *drv,
1078 char *buf)
1079 {
1080 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1081 }
1082
1083 static DRIVER_ATTR(interface_version, S_IRUGO,
1084 tpacpi_driver_interface_version_show, NULL);
1085
1086 /* debug_level --------------------------------------------------------- */
1087 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1088 char *buf)
1089 {
1090 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1091 }
1092
1093 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1094 const char *buf, size_t count)
1095 {
1096 unsigned long t;
1097
1098 if (parse_strtoul(buf, 0xffff, &t))
1099 return -EINVAL;
1100
1101 dbg_level = t;
1102
1103 return count;
1104 }
1105
1106 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1107 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1108
1109 /* version ------------------------------------------------------------- */
1110 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1111 char *buf)
1112 {
1113 return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1114 TPACPI_DESC, TPACPI_VERSION);
1115 }
1116
1117 static DRIVER_ATTR(version, S_IRUGO,
1118 tpacpi_driver_version_show, NULL);
1119
1120 /* --------------------------------------------------------------------- */
1121
1122 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1123
1124 static void tpacpi_send_radiosw_update(void);
1125
1126 /* wlsw_emulstate ------------------------------------------------------ */
1127 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1128 char *buf)
1129 {
1130 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1131 }
1132
1133 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1134 const char *buf, size_t count)
1135 {
1136 unsigned long t;
1137
1138 if (parse_strtoul(buf, 1, &t))
1139 return -EINVAL;
1140
1141 if (tpacpi_wlsw_emulstate != t) {
1142 tpacpi_wlsw_emulstate = !!t;
1143 tpacpi_send_radiosw_update();
1144 } else
1145 tpacpi_wlsw_emulstate = !!t;
1146
1147 return count;
1148 }
1149
1150 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1151 tpacpi_driver_wlsw_emulstate_show,
1152 tpacpi_driver_wlsw_emulstate_store);
1153
1154 /* bluetooth_emulstate ------------------------------------------------- */
1155 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1156 struct device_driver *drv,
1157 char *buf)
1158 {
1159 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1160 }
1161
1162 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1163 struct device_driver *drv,
1164 const char *buf, size_t count)
1165 {
1166 unsigned long t;
1167
1168 if (parse_strtoul(buf, 1, &t))
1169 return -EINVAL;
1170
1171 tpacpi_bluetooth_emulstate = !!t;
1172
1173 return count;
1174 }
1175
1176 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1177 tpacpi_driver_bluetooth_emulstate_show,
1178 tpacpi_driver_bluetooth_emulstate_store);
1179
1180 /* wwan_emulstate ------------------------------------------------- */
1181 static ssize_t tpacpi_driver_wwan_emulstate_show(
1182 struct device_driver *drv,
1183 char *buf)
1184 {
1185 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1186 }
1187
1188 static ssize_t tpacpi_driver_wwan_emulstate_store(
1189 struct device_driver *drv,
1190 const char *buf, size_t count)
1191 {
1192 unsigned long t;
1193
1194 if (parse_strtoul(buf, 1, &t))
1195 return -EINVAL;
1196
1197 tpacpi_wwan_emulstate = !!t;
1198
1199 return count;
1200 }
1201
1202 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1203 tpacpi_driver_wwan_emulstate_show,
1204 tpacpi_driver_wwan_emulstate_store);
1205
1206 /* uwb_emulstate ------------------------------------------------- */
1207 static ssize_t tpacpi_driver_uwb_emulstate_show(
1208 struct device_driver *drv,
1209 char *buf)
1210 {
1211 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1212 }
1213
1214 static ssize_t tpacpi_driver_uwb_emulstate_store(
1215 struct device_driver *drv,
1216 const char *buf, size_t count)
1217 {
1218 unsigned long t;
1219
1220 if (parse_strtoul(buf, 1, &t))
1221 return -EINVAL;
1222
1223 tpacpi_uwb_emulstate = !!t;
1224
1225 return count;
1226 }
1227
1228 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1229 tpacpi_driver_uwb_emulstate_show,
1230 tpacpi_driver_uwb_emulstate_store);
1231 #endif
1232
1233 /* --------------------------------------------------------------------- */
1234
1235 static struct driver_attribute *tpacpi_driver_attributes[] = {
1236 &driver_attr_debug_level, &driver_attr_version,
1237 &driver_attr_interface_version,
1238 };
1239
1240 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1241 {
1242 int i, res;
1243
1244 i = 0;
1245 res = 0;
1246 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1247 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1248 i++;
1249 }
1250
1251 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1252 if (!res && dbg_wlswemul)
1253 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1254 if (!res && dbg_bluetoothemul)
1255 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1256 if (!res && dbg_wwanemul)
1257 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1258 if (!res && dbg_uwbemul)
1259 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1260 #endif
1261
1262 return res;
1263 }
1264
1265 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1266 {
1267 int i;
1268
1269 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1270 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1271
1272 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1273 driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1274 driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1275 driver_remove_file(drv, &driver_attr_wwan_emulstate);
1276 driver_remove_file(drv, &driver_attr_uwb_emulstate);
1277 #endif
1278 }
1279
1280 /****************************************************************************
1281 ****************************************************************************
1282 *
1283 * Subdrivers
1284 *
1285 ****************************************************************************
1286 ****************************************************************************/
1287
1288 /*************************************************************************
1289 * thinkpad-acpi init subdriver
1290 */
1291
1292 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1293 {
1294 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1295 printk(TPACPI_INFO "%s\n", TPACPI_URL);
1296
1297 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1298 (thinkpad_id.bios_version_str) ?
1299 thinkpad_id.bios_version_str : "unknown",
1300 (thinkpad_id.ec_version_str) ?
1301 thinkpad_id.ec_version_str : "unknown");
1302
1303 if (thinkpad_id.vendor && thinkpad_id.model_str)
1304 printk(TPACPI_INFO "%s %s, model %s\n",
1305 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1306 "IBM" : ((thinkpad_id.vendor ==
1307 PCI_VENDOR_ID_LENOVO) ?
1308 "Lenovo" : "Unknown vendor"),
1309 thinkpad_id.model_str,
1310 (thinkpad_id.nummodel_str) ?
1311 thinkpad_id.nummodel_str : "unknown");
1312
1313 return 0;
1314 }
1315
1316 static int thinkpad_acpi_driver_read(char *p)
1317 {
1318 int len = 0;
1319
1320 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1321 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1322
1323 return len;
1324 }
1325
1326 static struct ibm_struct thinkpad_acpi_driver_data = {
1327 .name = "driver",
1328 .read = thinkpad_acpi_driver_read,
1329 };
1330
1331 /*************************************************************************
1332 * Hotkey subdriver
1333 */
1334
1335 enum { /* hot key scan codes (derived from ACPI DSDT) */
1336 TP_ACPI_HOTKEYSCAN_FNF1 = 0,
1337 TP_ACPI_HOTKEYSCAN_FNF2,
1338 TP_ACPI_HOTKEYSCAN_FNF3,
1339 TP_ACPI_HOTKEYSCAN_FNF4,
1340 TP_ACPI_HOTKEYSCAN_FNF5,
1341 TP_ACPI_HOTKEYSCAN_FNF6,
1342 TP_ACPI_HOTKEYSCAN_FNF7,
1343 TP_ACPI_HOTKEYSCAN_FNF8,
1344 TP_ACPI_HOTKEYSCAN_FNF9,
1345 TP_ACPI_HOTKEYSCAN_FNF10,
1346 TP_ACPI_HOTKEYSCAN_FNF11,
1347 TP_ACPI_HOTKEYSCAN_FNF12,
1348 TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1349 TP_ACPI_HOTKEYSCAN_FNINSERT,
1350 TP_ACPI_HOTKEYSCAN_FNDELETE,
1351 TP_ACPI_HOTKEYSCAN_FNHOME,
1352 TP_ACPI_HOTKEYSCAN_FNEND,
1353 TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1354 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1355 TP_ACPI_HOTKEYSCAN_FNSPACE,
1356 TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1357 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1358 TP_ACPI_HOTKEYSCAN_MUTE,
1359 TP_ACPI_HOTKEYSCAN_THINKPAD,
1360 };
1361
1362 enum { /* Keys available through NVRAM polling */
1363 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1364 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
1365 };
1366
1367 enum { /* Positions of some of the keys in hotkey masks */
1368 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1369 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1370 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1371 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1372 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1373 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1374 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1375 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1376 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1377 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1378 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1379 };
1380
1381 enum { /* NVRAM to ACPI HKEY group map */
1382 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
1383 TP_ACPI_HKEY_ZOOM_MASK |
1384 TP_ACPI_HKEY_DISPSWTCH_MASK |
1385 TP_ACPI_HKEY_HIBERNATE_MASK,
1386 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
1387 TP_ACPI_HKEY_BRGHTDWN_MASK,
1388 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
1389 TP_ACPI_HKEY_VOLDWN_MASK |
1390 TP_ACPI_HKEY_MUTE_MASK,
1391 };
1392
1393 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1394 struct tp_nvram_state {
1395 u16 thinkpad_toggle:1;
1396 u16 zoom_toggle:1;
1397 u16 display_toggle:1;
1398 u16 thinklight_toggle:1;
1399 u16 hibernate_toggle:1;
1400 u16 displayexp_toggle:1;
1401 u16 display_state:1;
1402 u16 brightness_toggle:1;
1403 u16 volume_toggle:1;
1404 u16 mute:1;
1405
1406 u8 brightness_level;
1407 u8 volume_level;
1408 };
1409
1410 static struct task_struct *tpacpi_hotkey_task;
1411 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
1412 static int hotkey_poll_freq = 10; /* Hz */
1413 static struct mutex hotkey_thread_mutex;
1414 static struct mutex hotkey_thread_data_mutex;
1415 static unsigned int hotkey_config_change;
1416
1417 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1418
1419 #define hotkey_source_mask 0U
1420
1421 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1422
1423 static struct mutex hotkey_mutex;
1424
1425 static enum { /* Reasons for waking up */
1426 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
1427 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
1428 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
1429 } hotkey_wakeup_reason;
1430
1431 static int hotkey_autosleep_ack;
1432
1433 static u32 hotkey_orig_mask;
1434 static u32 hotkey_all_mask;
1435 static u32 hotkey_reserved_mask;
1436 static u32 hotkey_mask;
1437
1438 static unsigned int hotkey_report_mode;
1439
1440 static u16 *hotkey_keycode_map;
1441
1442 static struct attribute_set *hotkey_dev_attributes;
1443
1444 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1445 #define HOTKEY_CONFIG_CRITICAL_START \
1446 do { \
1447 mutex_lock(&hotkey_thread_data_mutex); \
1448 hotkey_config_change++; \
1449 } while (0);
1450 #define HOTKEY_CONFIG_CRITICAL_END \
1451 mutex_unlock(&hotkey_thread_data_mutex);
1452 #else
1453 #define HOTKEY_CONFIG_CRITICAL_START
1454 #define HOTKEY_CONFIG_CRITICAL_END
1455 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1456
1457 /* HKEY.MHKG() return bits */
1458 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1459
1460 static int hotkey_get_wlsw(int *status)
1461 {
1462 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1463 if (dbg_wlswemul) {
1464 *status = !!tpacpi_wlsw_emulstate;
1465 return 0;
1466 }
1467 #endif
1468 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1469 return -EIO;
1470 return 0;
1471 }
1472
1473 static int hotkey_get_tablet_mode(int *status)
1474 {
1475 int s;
1476
1477 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1478 return -EIO;
1479
1480 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1481 return 0;
1482 }
1483
1484 /*
1485 * Call with hotkey_mutex held
1486 */
1487 static int hotkey_mask_get(void)
1488 {
1489 u32 m = 0;
1490
1491 if (tp_features.hotkey_mask) {
1492 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1493 return -EIO;
1494 }
1495 hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1496
1497 return 0;
1498 }
1499
1500 /*
1501 * Call with hotkey_mutex held
1502 */
1503 static int hotkey_mask_set(u32 mask)
1504 {
1505 int i;
1506 int rc = 0;
1507
1508 if (tp_features.hotkey_mask) {
1509 if (!tp_warned.hotkey_mask_ff &&
1510 (mask == 0xffff || mask == 0xffffff ||
1511 mask == 0xffffffff)) {
1512 tp_warned.hotkey_mask_ff = 1;
1513 printk(TPACPI_NOTICE
1514 "setting the hotkey mask to 0x%08x is likely "
1515 "not the best way to go about it\n", mask);
1516 printk(TPACPI_NOTICE
1517 "please consider using the driver defaults, "
1518 "and refer to up-to-date thinkpad-acpi "
1519 "documentation\n");
1520 }
1521
1522 HOTKEY_CONFIG_CRITICAL_START
1523 for (i = 0; i < 32; i++) {
1524 u32 m = 1 << i;
1525 /* enable in firmware mask only keys not in NVRAM
1526 * mode, but enable the key in the cached hotkey_mask
1527 * regardless of mode, or the key will end up
1528 * disabled by hotkey_mask_get() */
1529 if (!acpi_evalf(hkey_handle,
1530 NULL, "MHKM", "vdd", i + 1,
1531 !!((mask & ~hotkey_source_mask) & m))) {
1532 rc = -EIO;
1533 break;
1534 } else {
1535 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1536 }
1537 }
1538 HOTKEY_CONFIG_CRITICAL_END
1539
1540 /* hotkey_mask_get must be called unconditionally below */
1541 if (!hotkey_mask_get() && !rc &&
1542 (hotkey_mask & ~hotkey_source_mask) !=
1543 (mask & ~hotkey_source_mask)) {
1544 printk(TPACPI_NOTICE
1545 "requested hot key mask 0x%08x, but "
1546 "firmware forced it to 0x%08x\n",
1547 mask, hotkey_mask);
1548 }
1549 } else {
1550 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1551 HOTKEY_CONFIG_CRITICAL_START
1552 hotkey_mask = mask & hotkey_source_mask;
1553 HOTKEY_CONFIG_CRITICAL_END
1554 hotkey_mask_get();
1555 if (hotkey_mask != mask) {
1556 printk(TPACPI_NOTICE
1557 "requested hot key mask 0x%08x, "
1558 "forced to 0x%08x (NVRAM poll mask is "
1559 "0x%08x): no firmware mask support\n",
1560 mask, hotkey_mask, hotkey_source_mask);
1561 }
1562 #else
1563 hotkey_mask_get();
1564 rc = -ENXIO;
1565 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1566 }
1567
1568 return rc;
1569 }
1570
1571 static int hotkey_status_get(int *status)
1572 {
1573 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1574 return -EIO;
1575
1576 return 0;
1577 }
1578
1579 static int hotkey_status_set(bool enable)
1580 {
1581 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1582 return -EIO;
1583
1584 return 0;
1585 }
1586
1587 static void tpacpi_input_send_tabletsw(void)
1588 {
1589 int state;
1590
1591 if (tp_features.hotkey_tablet &&
1592 !hotkey_get_tablet_mode(&state)) {
1593 mutex_lock(&tpacpi_inputdev_send_mutex);
1594
1595 input_report_switch(tpacpi_inputdev,
1596 SW_TABLET_MODE, !!state);
1597 input_sync(tpacpi_inputdev);
1598
1599 mutex_unlock(&tpacpi_inputdev_send_mutex);
1600 }
1601 }
1602
1603 static void tpacpi_input_send_key(unsigned int scancode)
1604 {
1605 unsigned int keycode;
1606
1607 keycode = hotkey_keycode_map[scancode];
1608
1609 if (keycode != KEY_RESERVED) {
1610 mutex_lock(&tpacpi_inputdev_send_mutex);
1611
1612 input_report_key(tpacpi_inputdev, keycode, 1);
1613 if (keycode == KEY_UNKNOWN)
1614 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1615 scancode);
1616 input_sync(tpacpi_inputdev);
1617
1618 input_report_key(tpacpi_inputdev, keycode, 0);
1619 if (keycode == KEY_UNKNOWN)
1620 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1621 scancode);
1622 input_sync(tpacpi_inputdev);
1623
1624 mutex_unlock(&tpacpi_inputdev_send_mutex);
1625 }
1626 }
1627
1628 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1629 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1630
1631 static void tpacpi_hotkey_send_key(unsigned int scancode)
1632 {
1633 tpacpi_input_send_key(scancode);
1634 if (hotkey_report_mode < 2) {
1635 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1636 0x80, 0x1001 + scancode);
1637 }
1638 }
1639
1640 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1641 {
1642 u8 d;
1643
1644 if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1645 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1646 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1647 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1648 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1649 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1650 }
1651 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1652 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1653 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1654 }
1655 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1656 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1657 n->displayexp_toggle =
1658 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1659 }
1660 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1661 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1662 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1663 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1664 n->brightness_toggle =
1665 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1666 }
1667 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1668 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1669 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1670 >> TP_NVRAM_POS_LEVEL_VOLUME;
1671 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1672 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1673 }
1674 }
1675
1676 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1677 do { \
1678 if ((mask & (1 << __scancode)) && \
1679 oldn->__member != newn->__member) \
1680 tpacpi_hotkey_send_key(__scancode); \
1681 } while (0)
1682
1683 #define TPACPI_MAY_SEND_KEY(__scancode) \
1684 do { if (mask & (1 << __scancode)) \
1685 tpacpi_hotkey_send_key(__scancode); } while (0)
1686
1687 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1688 struct tp_nvram_state *newn,
1689 u32 mask)
1690 {
1691 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1692 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1693 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1694 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1695
1696 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1697
1698 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1699
1700 /* handle volume */
1701 if (oldn->volume_toggle != newn->volume_toggle) {
1702 if (oldn->mute != newn->mute) {
1703 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1704 }
1705 if (oldn->volume_level > newn->volume_level) {
1706 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1707 } else if (oldn->volume_level < newn->volume_level) {
1708 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1709 } else if (oldn->mute == newn->mute) {
1710 /* repeated key presses that didn't change state */
1711 if (newn->mute) {
1712 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1713 } else if (newn->volume_level != 0) {
1714 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1715 } else {
1716 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1717 }
1718 }
1719 }
1720
1721 /* handle brightness */
1722 if (oldn->brightness_toggle != newn->brightness_toggle) {
1723 if (oldn->brightness_level < newn->brightness_level) {
1724 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1725 } else if (oldn->brightness_level > newn->brightness_level) {
1726 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1727 } else {
1728 /* repeated key presses that didn't change state */
1729 if (newn->brightness_level != 0) {
1730 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1731 } else {
1732 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1733 }
1734 }
1735 }
1736 }
1737
1738 #undef TPACPI_COMPARE_KEY
1739 #undef TPACPI_MAY_SEND_KEY
1740
1741 static int hotkey_kthread(void *data)
1742 {
1743 struct tp_nvram_state s[2];
1744 u32 mask;
1745 unsigned int si, so;
1746 unsigned long t;
1747 unsigned int change_detector, must_reset;
1748
1749 mutex_lock(&hotkey_thread_mutex);
1750
1751 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1752 goto exit;
1753
1754 set_freezable();
1755
1756 so = 0;
1757 si = 1;
1758 t = 0;
1759
1760 /* Initial state for compares */
1761 mutex_lock(&hotkey_thread_data_mutex);
1762 change_detector = hotkey_config_change;
1763 mask = hotkey_source_mask & hotkey_mask;
1764 mutex_unlock(&hotkey_thread_data_mutex);
1765 hotkey_read_nvram(&s[so], mask);
1766
1767 while (!kthread_should_stop() && hotkey_poll_freq) {
1768 if (t == 0)
1769 t = 1000/hotkey_poll_freq;
1770 t = msleep_interruptible(t);
1771 if (unlikely(kthread_should_stop()))
1772 break;
1773 must_reset = try_to_freeze();
1774 if (t > 0 && !must_reset)
1775 continue;
1776
1777 mutex_lock(&hotkey_thread_data_mutex);
1778 if (must_reset || hotkey_config_change != change_detector) {
1779 /* forget old state on thaw or config change */
1780 si = so;
1781 t = 0;
1782 change_detector = hotkey_config_change;
1783 }
1784 mask = hotkey_source_mask & hotkey_mask;
1785 mutex_unlock(&hotkey_thread_data_mutex);
1786
1787 if (likely(mask)) {
1788 hotkey_read_nvram(&s[si], mask);
1789 if (likely(si != so)) {
1790 hotkey_compare_and_issue_event(&s[so], &s[si],
1791 mask);
1792 }
1793 }
1794
1795 so = si;
1796 si ^= 1;
1797 }
1798
1799 exit:
1800 mutex_unlock(&hotkey_thread_mutex);
1801 return 0;
1802 }
1803
1804 static void hotkey_poll_stop_sync(void)
1805 {
1806 if (tpacpi_hotkey_task) {
1807 if (frozen(tpacpi_hotkey_task) ||
1808 freezing(tpacpi_hotkey_task))
1809 thaw_process(tpacpi_hotkey_task);
1810
1811 kthread_stop(tpacpi_hotkey_task);
1812 tpacpi_hotkey_task = NULL;
1813 mutex_lock(&hotkey_thread_mutex);
1814 /* at this point, the thread did exit */
1815 mutex_unlock(&hotkey_thread_mutex);
1816 }
1817 }
1818
1819 /* call with hotkey_mutex held */
1820 static void hotkey_poll_setup(int may_warn)
1821 {
1822 if ((hotkey_source_mask & hotkey_mask) != 0 &&
1823 hotkey_poll_freq > 0 &&
1824 (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1825 if (!tpacpi_hotkey_task) {
1826 tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1827 NULL, TPACPI_NVRAM_KTHREAD_NAME);
1828 if (IS_ERR(tpacpi_hotkey_task)) {
1829 tpacpi_hotkey_task = NULL;
1830 printk(TPACPI_ERR
1831 "could not create kernel thread "
1832 "for hotkey polling\n");
1833 }
1834 }
1835 } else {
1836 hotkey_poll_stop_sync();
1837 if (may_warn &&
1838 hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1839 printk(TPACPI_NOTICE
1840 "hot keys 0x%08x require polling, "
1841 "which is currently disabled\n",
1842 hotkey_source_mask);
1843 }
1844 }
1845 }
1846
1847 static void hotkey_poll_setup_safe(int may_warn)
1848 {
1849 mutex_lock(&hotkey_mutex);
1850 hotkey_poll_setup(may_warn);
1851 mutex_unlock(&hotkey_mutex);
1852 }
1853
1854 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1855
1856 static void hotkey_poll_setup_safe(int __unused)
1857 {
1858 }
1859
1860 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1861
1862 static int hotkey_inputdev_open(struct input_dev *dev)
1863 {
1864 switch (tpacpi_lifecycle) {
1865 case TPACPI_LIFE_INIT:
1866 /*
1867 * hotkey_init will call hotkey_poll_setup_safe
1868 * at the appropriate moment
1869 */
1870 return 0;
1871 case TPACPI_LIFE_EXITING:
1872 return -EBUSY;
1873 case TPACPI_LIFE_RUNNING:
1874 hotkey_poll_setup_safe(0);
1875 return 0;
1876 }
1877
1878 /* Should only happen if tpacpi_lifecycle is corrupt */
1879 BUG();
1880 return -EBUSY;
1881 }
1882
1883 static void hotkey_inputdev_close(struct input_dev *dev)
1884 {
1885 /* disable hotkey polling when possible */
1886 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1887 hotkey_poll_setup_safe(0);
1888 }
1889
1890 /* sysfs hotkey enable ------------------------------------------------- */
1891 static ssize_t hotkey_enable_show(struct device *dev,
1892 struct device_attribute *attr,
1893 char *buf)
1894 {
1895 int res, status;
1896
1897 printk_deprecated_attribute("hotkey_enable",
1898 "Hotkey reporting is always enabled");
1899
1900 res = hotkey_status_get(&status);
1901 if (res)
1902 return res;
1903
1904 return snprintf(buf, PAGE_SIZE, "%d\n", status);
1905 }
1906
1907 static ssize_t hotkey_enable_store(struct device *dev,
1908 struct device_attribute *attr,
1909 const char *buf, size_t count)
1910 {
1911 unsigned long t;
1912
1913 printk_deprecated_attribute("hotkey_enable",
1914 "Hotkeys can be disabled through hotkey_mask");
1915
1916 if (parse_strtoul(buf, 1, &t))
1917 return -EINVAL;
1918
1919 if (t == 0)
1920 return -EPERM;
1921
1922 return count;
1923 }
1924
1925 static struct device_attribute dev_attr_hotkey_enable =
1926 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1927 hotkey_enable_show, hotkey_enable_store);
1928
1929 /* sysfs hotkey mask --------------------------------------------------- */
1930 static ssize_t hotkey_mask_show(struct device *dev,
1931 struct device_attribute *attr,
1932 char *buf)
1933 {
1934 int res;
1935
1936 if (mutex_lock_killable(&hotkey_mutex))
1937 return -ERESTARTSYS;
1938 res = hotkey_mask_get();
1939 mutex_unlock(&hotkey_mutex);
1940
1941 return (res)?
1942 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1943 }
1944
1945 static ssize_t hotkey_mask_store(struct device *dev,
1946 struct device_attribute *attr,
1947 const char *buf, size_t count)
1948 {
1949 unsigned long t;
1950 int res;
1951
1952 if (parse_strtoul(buf, 0xffffffffUL, &t))
1953 return -EINVAL;
1954
1955 if (mutex_lock_killable(&hotkey_mutex))
1956 return -ERESTARTSYS;
1957
1958 res = hotkey_mask_set(t);
1959
1960 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1961 hotkey_poll_setup(1);
1962 #endif
1963
1964 mutex_unlock(&hotkey_mutex);
1965
1966 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
1967
1968 return (res) ? res : count;
1969 }
1970
1971 static struct device_attribute dev_attr_hotkey_mask =
1972 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1973 hotkey_mask_show, hotkey_mask_store);
1974
1975 /* sysfs hotkey bios_enabled ------------------------------------------- */
1976 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1977 struct device_attribute *attr,
1978 char *buf)
1979 {
1980 return sprintf(buf, "0\n");
1981 }
1982
1983 static struct device_attribute dev_attr_hotkey_bios_enabled =
1984 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1985
1986 /* sysfs hotkey bios_mask ---------------------------------------------- */
1987 static ssize_t hotkey_bios_mask_show(struct device *dev,
1988 struct device_attribute *attr,
1989 char *buf)
1990 {
1991 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1992 }
1993
1994 static struct device_attribute dev_attr_hotkey_bios_mask =
1995 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1996
1997 /* sysfs hotkey all_mask ----------------------------------------------- */
1998 static ssize_t hotkey_all_mask_show(struct device *dev,
1999 struct device_attribute *attr,
2000 char *buf)
2001 {
2002 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2003 hotkey_all_mask | hotkey_source_mask);
2004 }
2005
2006 static struct device_attribute dev_attr_hotkey_all_mask =
2007 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2008
2009 /* sysfs hotkey recommended_mask --------------------------------------- */
2010 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2011 struct device_attribute *attr,
2012 char *buf)
2013 {
2014 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2015 (hotkey_all_mask | hotkey_source_mask)
2016 & ~hotkey_reserved_mask);
2017 }
2018
2019 static struct device_attribute dev_attr_hotkey_recommended_mask =
2020 __ATTR(hotkey_recommended_mask, S_IRUGO,
2021 hotkey_recommended_mask_show, NULL);
2022
2023 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2024
2025 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2026 static ssize_t hotkey_source_mask_show(struct device *dev,
2027 struct device_attribute *attr,
2028 char *buf)
2029 {
2030 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2031 }
2032
2033 static ssize_t hotkey_source_mask_store(struct device *dev,
2034 struct device_attribute *attr,
2035 const char *buf, size_t count)
2036 {
2037 unsigned long t;
2038
2039 if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2040 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2041 return -EINVAL;
2042
2043 if (mutex_lock_killable(&hotkey_mutex))
2044 return -ERESTARTSYS;
2045
2046 HOTKEY_CONFIG_CRITICAL_START
2047 hotkey_source_mask = t;
2048 HOTKEY_CONFIG_CRITICAL_END
2049
2050 hotkey_poll_setup(1);
2051
2052 mutex_unlock(&hotkey_mutex);
2053
2054 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2055
2056 return count;
2057 }
2058
2059 static struct device_attribute dev_attr_hotkey_source_mask =
2060 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2061 hotkey_source_mask_show, hotkey_source_mask_store);
2062
2063 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2064 static ssize_t hotkey_poll_freq_show(struct device *dev,
2065 struct device_attribute *attr,
2066 char *buf)
2067 {
2068 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2069 }
2070
2071 static ssize_t hotkey_poll_freq_store(struct device *dev,
2072 struct device_attribute *attr,
2073 const char *buf, size_t count)
2074 {
2075 unsigned long t;
2076
2077 if (parse_strtoul(buf, 25, &t))
2078 return -EINVAL;
2079
2080 if (mutex_lock_killable(&hotkey_mutex))
2081 return -ERESTARTSYS;
2082
2083 hotkey_poll_freq = t;
2084
2085 hotkey_poll_setup(1);
2086 mutex_unlock(&hotkey_mutex);
2087
2088 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2089
2090 return count;
2091 }
2092
2093 static struct device_attribute dev_attr_hotkey_poll_freq =
2094 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2095 hotkey_poll_freq_show, hotkey_poll_freq_store);
2096
2097 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2098
2099 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2100 static ssize_t hotkey_radio_sw_show(struct device *dev,
2101 struct device_attribute *attr,
2102 char *buf)
2103 {
2104 int res, s;
2105 res = hotkey_get_wlsw(&s);
2106 if (res < 0)
2107 return res;
2108
2109 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2110 }
2111
2112 static struct device_attribute dev_attr_hotkey_radio_sw =
2113 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2114
2115 static void hotkey_radio_sw_notify_change(void)
2116 {
2117 if (tp_features.hotkey_wlsw)
2118 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2119 "hotkey_radio_sw");
2120 }
2121
2122 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2123 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2124 struct device_attribute *attr,
2125 char *buf)
2126 {
2127 int res, s;
2128 res = hotkey_get_tablet_mode(&s);
2129 if (res < 0)
2130 return res;
2131
2132 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2133 }
2134
2135 static struct device_attribute dev_attr_hotkey_tablet_mode =
2136 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2137
2138 static void hotkey_tablet_mode_notify_change(void)
2139 {
2140 if (tp_features.hotkey_tablet)
2141 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2142 "hotkey_tablet_mode");
2143 }
2144
2145 /* sysfs hotkey report_mode -------------------------------------------- */
2146 static ssize_t hotkey_report_mode_show(struct device *dev,
2147 struct device_attribute *attr,
2148 char *buf)
2149 {
2150 return snprintf(buf, PAGE_SIZE, "%d\n",
2151 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2152 }
2153
2154 static struct device_attribute dev_attr_hotkey_report_mode =
2155 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2156
2157 /* sysfs wakeup reason (pollable) -------------------------------------- */
2158 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2159 struct device_attribute *attr,
2160 char *buf)
2161 {
2162 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2163 }
2164
2165 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2166 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2167
2168 static void hotkey_wakeup_reason_notify_change(void)
2169 {
2170 if (tp_features.hotkey_mask)
2171 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2172 "wakeup_reason");
2173 }
2174
2175 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2176 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2177 struct device_attribute *attr,
2178 char *buf)
2179 {
2180 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2181 }
2182
2183 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2184 __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2185 hotkey_wakeup_hotunplug_complete_show, NULL);
2186
2187 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2188 {
2189 if (tp_features.hotkey_mask)
2190 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2191 "wakeup_hotunplug_complete");
2192 }
2193
2194 /* --------------------------------------------------------------------- */
2195
2196 static struct attribute *hotkey_attributes[] __initdata = {
2197 &dev_attr_hotkey_enable.attr,
2198 &dev_attr_hotkey_bios_enabled.attr,
2199 &dev_attr_hotkey_report_mode.attr,
2200 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2201 &dev_attr_hotkey_mask.attr,
2202 &dev_attr_hotkey_all_mask.attr,
2203 &dev_attr_hotkey_recommended_mask.attr,
2204 &dev_attr_hotkey_source_mask.attr,
2205 &dev_attr_hotkey_poll_freq.attr,
2206 #endif
2207 };
2208
2209 static struct attribute *hotkey_mask_attributes[] __initdata = {
2210 &dev_attr_hotkey_bios_mask.attr,
2211 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2212 &dev_attr_hotkey_mask.attr,
2213 &dev_attr_hotkey_all_mask.attr,
2214 &dev_attr_hotkey_recommended_mask.attr,
2215 #endif
2216 &dev_attr_hotkey_wakeup_reason.attr,
2217 &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2218 };
2219
2220 static void bluetooth_update_rfk(void);
2221 static void wan_update_rfk(void);
2222 static void uwb_update_rfk(void);
2223 static void tpacpi_send_radiosw_update(void)
2224 {
2225 int wlsw;
2226
2227 /* Sync these BEFORE sending any rfkill events */
2228 if (tp_features.bluetooth)
2229 bluetooth_update_rfk();
2230 if (tp_features.wan)
2231 wan_update_rfk();
2232 if (tp_features.uwb)
2233 uwb_update_rfk();
2234
2235 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2236 mutex_lock(&tpacpi_inputdev_send_mutex);
2237
2238 input_report_switch(tpacpi_inputdev,
2239 SW_RFKILL_ALL, !!wlsw);
2240 input_sync(tpacpi_inputdev);
2241
2242 mutex_unlock(&tpacpi_inputdev_send_mutex);
2243 }
2244 hotkey_radio_sw_notify_change();
2245 }
2246
2247 static void hotkey_exit(void)
2248 {
2249 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2250 hotkey_poll_stop_sync();
2251 #endif
2252
2253 if (hotkey_dev_attributes)
2254 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2255
2256 kfree(hotkey_keycode_map);
2257
2258 if (tp_features.hotkey) {
2259 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2260 "restoring original hot key mask\n");
2261 /* no short-circuit boolean operator below! */
2262 if ((hotkey_mask_set(hotkey_orig_mask) |
2263 hotkey_status_set(false)) != 0)
2264 printk(TPACPI_ERR
2265 "failed to restore hot key mask "
2266 "to BIOS defaults\n");
2267 }
2268 }
2269
2270 static int __init hotkey_init(struct ibm_init_struct *iibm)
2271 {
2272 /* Requirements for changing the default keymaps:
2273 *
2274 * 1. Many of the keys are mapped to KEY_RESERVED for very
2275 * good reasons. Do not change them unless you have deep
2276 * knowledge on the IBM and Lenovo ThinkPad firmware for
2277 * the various ThinkPad models. The driver behaves
2278 * differently for KEY_RESERVED: such keys have their
2279 * hot key mask *unset* in mask_recommended, and also
2280 * in the initial hot key mask programmed into the
2281 * firmware at driver load time, which means the firm-
2282 * ware may react very differently if you change them to
2283 * something else;
2284 *
2285 * 2. You must be subscribed to the linux-thinkpad and
2286 * ibm-acpi-devel mailing lists, and you should read the
2287 * list archives since 2007 if you want to change the
2288 * keymaps. This requirement exists so that you will
2289 * know the past history of problems with the thinkpad-
2290 * acpi driver keymaps, and also that you will be
2291 * listening to any bug reports;
2292 *
2293 * 3. Do not send thinkpad-acpi specific patches directly to
2294 * for merging, *ever*. Send them to the linux-acpi
2295 * mailinglist for comments. Merging is to be done only
2296 * through acpi-test and the ACPI maintainer.
2297 *
2298 * If the above is too much to ask, don't change the keymap.
2299 * Ask the thinkpad-acpi maintainer to do it, instead.
2300 */
2301 static u16 ibm_keycode_map[] __initdata = {
2302 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2303 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
2304 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2305 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2306
2307 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2308 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2309 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2310 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2311
2312 /* brightness: firmware always reacts to them, unless
2313 * X.org did some tricks in the radeon BIOS scratch
2314 * registers of *some* models */
2315 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2316 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2317
2318 /* Thinklight: firmware always react to it */
2319 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2320
2321 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2322 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2323
2324 /* Volume: firmware always react to it and reprograms
2325 * the built-in *extra* mixer. Never map it to control
2326 * another mixer by default. */
2327 KEY_RESERVED, /* 0x14: VOLUME UP */
2328 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2329 KEY_RESERVED, /* 0x16: MUTE */
2330
2331 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2332
2333 /* (assignments unknown, please report if found) */
2334 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2335 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2336 };
2337 static u16 lenovo_keycode_map[] __initdata = {
2338 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2339 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
2340 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2341 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
2342
2343 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2344 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
2345 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
2346 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
2347
2348 /* These either have to go through ACPI video, or
2349 * act like in the IBM ThinkPads, so don't ever
2350 * enable them by default */
2351 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
2352 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
2353
2354 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
2355
2356 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
2357 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
2358
2359 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2360 * react to it and reprograms the built-in *extra* mixer.
2361 * Never map it to control another mixer by default.
2362 *
2363 * T60?, T61, R60?, R61: firmware and EC tries to send
2364 * these over the regular keyboard, so these are no-ops,
2365 * but there are still weird bugs re. MUTE, so do not
2366 * change unless you get test reports from all Lenovo
2367 * models. May cause the BIOS to interfere with the
2368 * HDA mixer.
2369 */
2370 KEY_RESERVED, /* 0x14: VOLUME UP */
2371 KEY_RESERVED, /* 0x15: VOLUME DOWN */
2372 KEY_RESERVED, /* 0x16: MUTE */
2373
2374 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
2375
2376 /* (assignments unknown, please report if found) */
2377 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2378 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2379 };
2380
2381 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
2382 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
2383 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
2384
2385 int res, i;
2386 int status;
2387 int hkeyv;
2388
2389 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2390 "initializing hotkey subdriver\n");
2391
2392 BUG_ON(!tpacpi_inputdev);
2393 BUG_ON(tpacpi_inputdev->open != NULL ||
2394 tpacpi_inputdev->close != NULL);
2395
2396 TPACPI_ACPIHANDLE_INIT(hkey);
2397 mutex_init(&hotkey_mutex);
2398
2399 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2400 mutex_init(&hotkey_thread_mutex);
2401 mutex_init(&hotkey_thread_data_mutex);
2402 #endif
2403
2404 /* hotkey not supported on 570 */
2405 tp_features.hotkey = hkey_handle != NULL;
2406
2407 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2408 "hotkeys are %s\n",
2409 str_supported(tp_features.hotkey));
2410
2411 if (!tp_features.hotkey)
2412 return 1;
2413
2414 tpacpi_disable_brightness_delay();
2415
2416 hotkey_dev_attributes = create_attr_set(13, NULL);
2417 if (!hotkey_dev_attributes)
2418 return -ENOMEM;
2419 res = add_many_to_attr_set(hotkey_dev_attributes,
2420 hotkey_attributes,
2421 ARRAY_SIZE(hotkey_attributes));
2422 if (res)
2423 goto err_exit;
2424
2425 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2426 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
2427 for HKEY interface version 0x100 */
2428 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2429 if ((hkeyv >> 8) != 1) {
2430 printk(TPACPI_ERR "unknown version of the "
2431 "HKEY interface: 0x%x\n", hkeyv);
2432 printk(TPACPI_ERR "please report this to %s\n",
2433 TPACPI_MAIL);
2434 } else {
2435 /*
2436 * MHKV 0x100 in A31, R40, R40e,
2437 * T4x, X31, and later
2438 */
2439 tp_features.hotkey_mask = 1;
2440 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2441 "firmware HKEY interface version: 0x%x\n",
2442 hkeyv);
2443 }
2444 }
2445
2446 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2447 "hotkey masks are %s\n",
2448 str_supported(tp_features.hotkey_mask));
2449
2450 if (tp_features.hotkey_mask) {
2451 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2452 "MHKA", "qd")) {
2453 printk(TPACPI_ERR
2454 "missing MHKA handler, "
2455 "please report this to %s\n",
2456 TPACPI_MAIL);
2457 /* FN+F12, FN+F4, FN+F3 */
2458 hotkey_all_mask = 0x080cU;
2459 }
2460 }
2461
2462 /* hotkey_source_mask *must* be zero for
2463 * the first hotkey_mask_get */
2464 if (tp_features.hotkey_mask) {
2465 res = hotkey_mask_get();
2466 if (res)
2467 goto err_exit;
2468
2469 hotkey_orig_mask = hotkey_mask;
2470 res = add_many_to_attr_set(
2471 hotkey_dev_attributes,
2472 hotkey_mask_attributes,
2473 ARRAY_SIZE(hotkey_mask_attributes));
2474 if (res)
2475 goto err_exit;
2476 }
2477
2478 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2479 if (tp_features.hotkey_mask) {
2480 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2481 & ~hotkey_all_mask;
2482 } else {
2483 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2484 }
2485
2486 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2487 "hotkey source mask 0x%08x, polling freq %d\n",
2488 hotkey_source_mask, hotkey_poll_freq);
2489 #endif
2490
2491 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2492 if (dbg_wlswemul) {
2493 tp_features.hotkey_wlsw = 1;
2494 printk(TPACPI_INFO
2495 "radio switch emulation enabled\n");
2496 } else
2497 #endif
2498 /* Not all thinkpads have a hardware radio switch */
2499 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2500 tp_features.hotkey_wlsw = 1;
2501 printk(TPACPI_INFO
2502 "radio switch found; radios are %s\n",
2503 enabled(status, 0));
2504 }
2505 if (tp_features.hotkey_wlsw)
2506 res = add_to_attr_set(hotkey_dev_attributes,
2507 &dev_attr_hotkey_radio_sw.attr);
2508
2509 /* For X41t, X60t, X61t Tablets... */
2510 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2511 tp_features.hotkey_tablet = 1;
2512 printk(TPACPI_INFO
2513 "possible tablet mode switch found; "
2514 "ThinkPad in %s mode\n",
2515 (status & TP_HOTKEY_TABLET_MASK)?
2516 "tablet" : "laptop");
2517 res = add_to_attr_set(hotkey_dev_attributes,
2518 &dev_attr_hotkey_tablet_mode.attr);
2519 }
2520
2521 if (!res)
2522 res = register_attr_set_with_sysfs(
2523 hotkey_dev_attributes,
2524 &tpacpi_pdev->dev.kobj);
2525 if (res)
2526 goto err_exit;
2527
2528 /* Set up key map */
2529
2530 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2531 GFP_KERNEL);
2532 if (!hotkey_keycode_map) {
2533 printk(TPACPI_ERR
2534 "failed to allocate memory for key map\n");
2535 res = -ENOMEM;
2536 goto err_exit;
2537 }
2538
2539 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2540 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2541 "using Lenovo default hot key map\n");
2542 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2543 TPACPI_HOTKEY_MAP_SIZE);
2544 } else {
2545 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2546 "using IBM default hot key map\n");
2547 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2548 TPACPI_HOTKEY_MAP_SIZE);
2549 }
2550
2551 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2552 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2553 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2554 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2555 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2556 tpacpi_inputdev->keycode = hotkey_keycode_map;
2557 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2558 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2559 set_bit(hotkey_keycode_map[i],
2560 tpacpi_inputdev->keybit);
2561 } else {
2562 if (i < sizeof(hotkey_reserved_mask)*8)
2563 hotkey_reserved_mask |= 1 << i;
2564 }
2565 }
2566
2567 if (tp_features.hotkey_wlsw) {
2568 set_bit(EV_SW, tpacpi_inputdev->evbit);
2569 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2570 }
2571 if (tp_features.hotkey_tablet) {
2572 set_bit(EV_SW, tpacpi_inputdev->evbit);
2573 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2574 }
2575
2576 /* Do not issue duplicate brightness change events to
2577 * userspace */
2578 if (!tp_features.bright_acpimode)
2579 /* update bright_acpimode... */
2580 tpacpi_check_std_acpi_brightness_support();
2581
2582 if (tp_features.bright_acpimode) {
2583 printk(TPACPI_INFO
2584 "This ThinkPad has standard ACPI backlight "
2585 "brightness control, supported by the ACPI "
2586 "video driver\n");
2587 printk(TPACPI_NOTICE
2588 "Disabling thinkpad-acpi brightness events "
2589 "by default...\n");
2590
2591 /* The hotkey_reserved_mask change below is not
2592 * necessary while the keys are at KEY_RESERVED in the
2593 * default map, but better safe than sorry, leave it
2594 * here as a marker of what we have to do, especially
2595 * when we finally become able to set this at runtime
2596 * on response to X.org requests */
2597 hotkey_reserved_mask |=
2598 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2599 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2600 }
2601
2602 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2603 "enabling firmware HKEY event interface...\n");
2604 res = hotkey_status_set(true);
2605 if (res) {
2606 hotkey_exit();
2607 return res;
2608 }
2609 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2610 & ~hotkey_reserved_mask)
2611 | hotkey_orig_mask);
2612 if (res < 0 && res != -ENXIO) {
2613 hotkey_exit();
2614 return res;
2615 }
2616
2617 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2618 "legacy ibm/hotkey event reporting over procfs %s\n",
2619 (hotkey_report_mode < 2) ?
2620 "enabled" : "disabled");
2621
2622 tpacpi_inputdev->open = &hotkey_inputdev_open;
2623 tpacpi_inputdev->close = &hotkey_inputdev_close;
2624
2625 hotkey_poll_setup_safe(1);
2626 tpacpi_send_radiosw_update();
2627 tpacpi_input_send_tabletsw();
2628
2629 return 0;
2630
2631 err_exit:
2632 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2633 hotkey_dev_attributes = NULL;
2634
2635 return (res < 0)? res : 1;
2636 }
2637
2638 static bool hotkey_notify_hotkey(const u32 hkey,
2639 bool *send_acpi_ev,
2640 bool *ignore_acpi_ev)
2641 {
2642 /* 0x1000-0x1FFF: key presses */
2643 unsigned int scancode = hkey & 0xfff;
2644 *send_acpi_ev = true;
2645 *ignore_acpi_ev = false;
2646
2647 if (scancode > 0 && scancode < 0x21) {
2648 scancode--;
2649 if (!(hotkey_source_mask & (1 << scancode))) {
2650 tpacpi_input_send_key(scancode);
2651 *send_acpi_ev = false;
2652 } else {
2653 *ignore_acpi_ev = true;
2654 }
2655 return true;
2656 }
2657 return false;
2658 }
2659
2660 static bool hotkey_notify_wakeup(const u32 hkey,
2661 bool *send_acpi_ev,
2662 bool *ignore_acpi_ev)
2663 {
2664 /* 0x2000-0x2FFF: Wakeup reason */
2665 *send_acpi_ev = true;
2666 *ignore_acpi_ev = false;
2667
2668 switch (hkey) {
2669 case 0x2304: /* suspend, undock */
2670 case 0x2404: /* hibernation, undock */
2671 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2672 *ignore_acpi_ev = true;
2673 break;
2674
2675 case 0x2305: /* suspend, bay eject */
2676 case 0x2405: /* hibernation, bay eject */
2677 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2678 *ignore_acpi_ev = true;
2679 break;
2680
2681 case 0x2313: /* Battery on critical low level (S3) */
2682 case 0x2413: /* Battery on critical low level (S4) */
2683 printk(TPACPI_ALERT
2684 "EMERGENCY WAKEUP: battery almost empty\n");
2685 /* how to auto-heal: */
2686 /* 2313: woke up from S3, go to S4/S5 */
2687 /* 2413: woke up from S4, go to S5 */
2688 break;
2689
2690 default:
2691 return false;
2692 }
2693
2694 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2695 printk(TPACPI_INFO
2696 "woke up due to a hot-unplug "
2697 "request...\n");
2698 hotkey_wakeup_reason_notify_change();
2699 }
2700 return true;
2701 }
2702
2703 static bool hotkey_notify_usrevent(const u32 hkey,
2704 bool *send_acpi_ev,
2705 bool *ignore_acpi_ev)
2706 {
2707 /* 0x5000-0x5FFF: human interface helpers */
2708 *send_acpi_ev = true;
2709 *ignore_acpi_ev = false;
2710
2711 switch (hkey) {
2712 case 0x5010: /* Lenovo new BIOS: brightness changed */
2713 case 0x500b: /* X61t: tablet pen inserted into bay */
2714 case 0x500c: /* X61t: tablet pen removed from bay */
2715 return true;
2716
2717 case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2718 case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2719 tpacpi_input_send_tabletsw();
2720 hotkey_tablet_mode_notify_change();
2721 *send_acpi_ev = false;
2722 return true;
2723
2724 case 0x5001:
2725 case 0x5002:
2726 /* LID switch events. Do not propagate */
2727 *ignore_acpi_ev = true;
2728 return true;
2729
2730 default:
2731 return false;
2732 }
2733 }
2734
2735 static bool hotkey_notify_thermal(const u32 hkey,
2736 bool *send_acpi_ev,
2737 bool *ignore_acpi_ev)
2738 {
2739 /* 0x6000-0x6FFF: thermal alarms */
2740 *send_acpi_ev = true;
2741 *ignore_acpi_ev = false;
2742
2743 switch (hkey) {
2744 case 0x6011:
2745 printk(TPACPI_CRIT
2746 "THERMAL ALARM: battery is too hot!\n");
2747 /* recommended action: warn user through gui */
2748 return true;
2749 case 0x6012:
2750 printk(TPACPI_ALERT
2751 "THERMAL EMERGENCY: battery is extremely hot!\n");
2752 /* recommended action: immediate sleep/hibernate */
2753 return true;
2754 case 0x6021:
2755 printk(TPACPI_CRIT
2756 "THERMAL ALARM: "
2757 "a sensor reports something is too hot!\n");
2758 /* recommended action: warn user through gui, that */
2759 /* some internal component is too hot */
2760 return true;
2761 case 0x6022:
2762 printk(TPACPI_ALERT
2763 "THERMAL EMERGENCY: "
2764 "a sensor reports something is extremely hot!\n");
2765 /* recommended action: immediate sleep/hibernate */
2766 return true;
2767 case 0x6030:
2768 printk(TPACPI_INFO
2769 "EC reports that Thermal Table has changed\n");
2770 /* recommended action: do nothing, we don't have
2771 * Lenovo ATM information */
2772 return true;
2773 default:
2774 printk(TPACPI_ALERT
2775 "THERMAL ALERT: unknown thermal alarm received\n");
2776 return false;
2777 }
2778 }
2779
2780 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2781 {
2782 u32 hkey;
2783 bool send_acpi_ev;
2784 bool ignore_acpi_ev;
2785 bool known_ev;
2786
2787 if (event != 0x80) {
2788 printk(TPACPI_ERR
2789 "unknown HKEY notification event %d\n", event);
2790 /* forward it to userspace, maybe it knows how to handle it */
2791 acpi_bus_generate_netlink_event(
2792 ibm->acpi->device->pnp.device_class,
2793 dev_name(&ibm->acpi->device->dev),
2794 event, 0);
2795 return;
2796 }
2797
2798 while (1) {
2799 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2800 printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2801 return;
2802 }
2803
2804 if (hkey == 0) {
2805 /* queue empty */
2806 return;
2807 }
2808
2809 send_acpi_ev = true;
2810 ignore_acpi_ev = false;
2811
2812 switch (hkey >> 12) {
2813 case 1:
2814 /* 0x1000-0x1FFF: key presses */
2815 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2816 &ignore_acpi_ev);
2817 break;
2818 case 2:
2819 /* 0x2000-0x2FFF: Wakeup reason */
2820 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2821 &ignore_acpi_ev);
2822 break;
2823 case 3:
2824 /* 0x3000-0x3FFF: bay-related wakeups */
2825 if (hkey == 0x3003) {
2826 hotkey_autosleep_ack = 1;
2827 printk(TPACPI_INFO
2828 "bay ejected\n");
2829 hotkey_wakeup_hotunplug_complete_notify_change();
2830 known_ev = true;
2831 } else {
2832 known_ev = false;
2833 }
2834 break;
2835 case 4:
2836 /* 0x4000-0x4FFF: dock-related wakeups */
2837 if (hkey == 0x4003) {
2838 hotkey_autosleep_ack = 1;
2839 printk(TPACPI_INFO
2840 "undocked\n");
2841 hotkey_wakeup_hotunplug_complete_notify_change();
2842 known_ev = true;
2843 } else {
2844 known_ev = false;
2845 }
2846 break;
2847 case 5:
2848 /* 0x5000-0x5FFF: human interface helpers */
2849 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2850 &ignore_acpi_ev);
2851 break;
2852 case 6:
2853 /* 0x6000-0x6FFF: thermal alarms */
2854 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2855 &ignore_acpi_ev);
2856 break;
2857 case 7:
2858 /* 0x7000-0x7FFF: misc */
2859 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2860 tpacpi_send_radiosw_update();
2861 send_acpi_ev = 0;
2862 known_ev = true;
2863 break;
2864 }
2865 /* fallthrough to default */
2866 default:
2867 known_ev = false;
2868 }
2869 if (!known_ev) {
2870 printk(TPACPI_NOTICE
2871 "unhandled HKEY event 0x%04x\n", hkey);
2872 printk(TPACPI_NOTICE
2873 "please report the conditions when this "
2874 "event happened to %s\n", TPACPI_MAIL);
2875 }
2876
2877 /* Legacy events */
2878 if (!ignore_acpi_ev &&
2879 (send_acpi_ev || hotkey_report_mode < 2)) {
2880 acpi_bus_generate_proc_event(ibm->acpi->device,
2881 event, hkey);
2882 }
2883
2884 /* netlink events */
2885 if (!ignore_acpi_ev && send_acpi_ev) {
2886 acpi_bus_generate_netlink_event(
2887 ibm->acpi->device->pnp.device_class,
2888 dev_name(&ibm->acpi->device->dev),
2889 event, hkey);
2890 }
2891 }
2892 }
2893
2894 static void hotkey_suspend(pm_message_t state)
2895 {
2896 /* Do these on suspend, we get the events on early resume! */
2897 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2898 hotkey_autosleep_ack = 0;
2899 }
2900
2901 static void hotkey_resume(void)
2902 {
2903 tpacpi_disable_brightness_delay();
2904
2905 if (hotkey_mask_get())
2906 printk(TPACPI_ERR
2907 "error while trying to read hot key mask "
2908 "from firmware\n");
2909 tpacpi_send_radiosw_update();
2910 hotkey_tablet_mode_notify_change();
2911 hotkey_wakeup_reason_notify_change();
2912 hotkey_wakeup_hotunplug_complete_notify_change();
2913 hotkey_poll_setup_safe(0);
2914 }
2915
2916 /* procfs -------------------------------------------------------------- */
2917 static int hotkey_read(char *p)
2918 {
2919 int res, status;
2920 int len = 0;
2921
2922 if (!tp_features.hotkey) {
2923 len += sprintf(p + len, "status:\t\tnot supported\n");
2924 return len;
2925 }
2926
2927 if (mutex_lock_killable(&hotkey_mutex))
2928 return -ERESTARTSYS;
2929 res = hotkey_status_get(&status);
2930 if (!res)
2931 res = hotkey_mask_get();
2932 mutex_unlock(&hotkey_mutex);
2933 if (res)
2934 return res;
2935
2936 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2937 if (tp_features.hotkey_mask) {
2938 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2939 len += sprintf(p + len,
2940 "commands:\tenable, disable, reset, <mask>\n");
2941 } else {
2942 len += sprintf(p + len, "mask:\t\tnot supported\n");
2943 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2944 }
2945
2946 return len;
2947 }
2948
2949 static void hotkey_enabledisable_warn(void)
2950 {
2951 tpacpi_log_usertask("procfs hotkey enable/disable");
2952 WARN(1, TPACPI_WARN
2953 "hotkey enable/disable functionality has been "
2954 "removed from the driver. Hotkeys are always enabled.\n");
2955 }
2956
2957 static int hotkey_write(char *buf)
2958 {
2959 int res;
2960 u32 mask;
2961 char *cmd;
2962
2963 if (!tp_features.hotkey)
2964 return -ENODEV;
2965
2966 if (mutex_lock_killable(&hotkey_mutex))
2967 return -ERESTARTSYS;
2968
2969 mask = hotkey_mask;
2970
2971 res = 0;
2972 while ((cmd = next_cmd(&buf))) {
2973 if (strlencmp(cmd, "enable") == 0) {
2974 hotkey_enabledisable_warn();
2975 } else if (strlencmp(cmd, "disable") == 0) {
2976 hotkey_enabledisable_warn();
2977 res = -EPERM;
2978 } else if (strlencmp(cmd, "reset") == 0) {
2979 mask = hotkey_orig_mask;
2980 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2981 /* mask set */
2982 } else if (sscanf(cmd, "%x", &mask) == 1) {
2983 /* mask set */
2984 } else {
2985 res = -EINVAL;
2986 goto errexit;
2987 }
2988 }
2989
2990 if (!res)
2991 tpacpi_disclose_usertask("procfs hotkey",
2992 "set mask to 0x%08x\n", mask);
2993
2994 if (!res && mask != hotkey_mask)
2995 res = hotkey_mask_set(mask);
2996
2997 errexit:
2998 mutex_unlock(&hotkey_mutex);
2999 return res;
3000 }
3001
3002 static const struct acpi_device_id ibm_htk_device_ids[] = {
3003 {TPACPI_ACPI_HKEY_HID, 0},
3004 {"", 0},
3005 };
3006
3007 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3008 .hid = ibm_htk_device_ids,
3009 .notify = hotkey_notify,
3010 .handle = &hkey_handle,
3011 .type = ACPI_DEVICE_NOTIFY,
3012 };
3013
3014 static struct ibm_struct hotkey_driver_data = {
3015 .name = "hotkey",
3016 .read = hotkey_read,
3017 .write = hotkey_write,
3018 .exit = hotkey_exit,
3019 .resume = hotkey_resume,
3020 .suspend = hotkey_suspend,
3021 .acpi = &ibm_hotkey_acpidriver,
3022 };
3023
3024 /*************************************************************************
3025 * Bluetooth subdriver
3026 */
3027
3028 enum {
3029 /* ACPI GBDC/SBDC bits */
3030 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
3031 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
3032 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume:
3033 off / last state */
3034 };
3035
3036 enum {
3037 /* ACPI \BLTH commands */
3038 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */
3039 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */
3040 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */
3041 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */
3042 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
3043 };
3044
3045 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
3046
3047 static struct rfkill *tpacpi_bluetooth_rfkill;
3048
3049 static void bluetooth_suspend(pm_message_t state)
3050 {
3051 /* Try to make sure radio will resume powered off */
3052 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3053 TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3054 vdbg_printk(TPACPI_DBG_RFKILL,
3055 "bluetooth power down on resume request failed\n");
3056 }
3057
3058 static int bluetooth_get_radiosw(void)
3059 {
3060 int status;
3061
3062 if (!tp_features.bluetooth)
3063 return -ENODEV;
3064
3065 /* WLSW overrides bluetooth in firmware/hardware, reflect that */
3066 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3067 return RFKILL_STATE_HARD_BLOCKED;
3068
3069 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3070 if (dbg_bluetoothemul)
3071 return (tpacpi_bluetooth_emulstate) ?
3072 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3073 #endif
3074
3075 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3076 return -EIO;
3077
3078 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3079 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3080 }
3081
3082 static void bluetooth_update_rfk(void)
3083 {
3084 int status;
3085
3086 if (!tpacpi_bluetooth_rfkill)
3087 return;
3088
3089 status = bluetooth_get_radiosw();
3090 if (status < 0)
3091 return;
3092 rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3093
3094 vdbg_printk(TPACPI_DBG_RFKILL,
3095 "forced rfkill state to %d\n",
3096 status);
3097 }
3098
3099 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3100 {
3101 int status;
3102
3103 if (!tp_features.bluetooth)
3104 return -ENODEV;
3105
3106 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3107 * reason to risk weird behaviour. */
3108 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3109 && radio_on)
3110 return -EPERM;
3111
3112 vdbg_printk(TPACPI_DBG_RFKILL,
3113 "will %s bluetooth\n", radio_on ? "enable" : "disable");
3114
3115 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3116 if (dbg_bluetoothemul) {
3117 tpacpi_bluetooth_emulstate = !!radio_on;
3118 if (update_rfk)
3119 bluetooth_update_rfk();
3120 return 0;
3121 }
3122 #endif
3123
3124 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3125 if (radio_on)
3126 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3127 else
3128 status = 0;
3129 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3130 return -EIO;
3131
3132 if (update_rfk)
3133 bluetooth_update_rfk();
3134
3135 return 0;
3136 }
3137
3138 /* sysfs bluetooth enable ---------------------------------------------- */
3139 static ssize_t bluetooth_enable_show(struct device *dev,
3140 struct device_attribute *attr,
3141 char *buf)
3142 {
3143 int status;
3144
3145 printk_deprecated_rfkill_attribute("bluetooth_enable");
3146
3147 status = bluetooth_get_radiosw();
3148 if (status < 0)
3149 return status;
3150
3151 return snprintf(buf, PAGE_SIZE, "%d\n",
3152 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3153 }
3154
3155 static ssize_t bluetooth_enable_store(struct device *dev,
3156 struct device_attribute *attr,
3157 const char *buf, size_t count)
3158 {
3159 unsigned long t;
3160 int res;
3161
3162 printk_deprecated_rfkill_attribute("bluetooth_enable");
3163
3164 if (parse_strtoul(buf, 1, &t))
3165 return -EINVAL;
3166
3167 tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
3168
3169 res = bluetooth_set_radiosw(t, 1);
3170
3171 return (res) ? res : count;
3172 }
3173
3174 static struct device_attribute dev_attr_bluetooth_enable =
3175 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3176 bluetooth_enable_show, bluetooth_enable_store);
3177
3178 /* --------------------------------------------------------------------- */
3179
3180 static struct attribute *bluetooth_attributes[] = {
3181 &dev_attr_bluetooth_enable.attr,
3182 NULL
3183 };
3184
3185 static const struct attribute_group bluetooth_attr_group = {
3186 .attrs = bluetooth_attributes,
3187 };
3188
3189 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3190 {
3191 int bts = bluetooth_get_radiosw();
3192
3193 if (bts < 0)
3194 return bts;
3195
3196 *state = bts;
3197 return 0;
3198 }
3199
3200 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3201 {
3202 dbg_printk(TPACPI_DBG_RFKILL,
3203 "request to change radio state to %d\n", state);
3204 return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3205 }
3206
3207 static void bluetooth_shutdown(void)
3208 {
3209 /* Order firmware to save current state to NVRAM */
3210 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3211 TP_ACPI_BLTH_SAVE_STATE))
3212 printk(TPACPI_NOTICE
3213 "failed to save bluetooth state to NVRAM\n");
3214 else
3215 vdbg_printk(TPACPI_DBG_RFKILL,
3216 "bluestooth state saved to NVRAM\n");
3217 }
3218
3219 static void bluetooth_exit(void)
3220 {
3221 bluetooth_shutdown();
3222
3223 if (tpacpi_bluetooth_rfkill)
3224 rfkill_unregister(tpacpi_bluetooth_rfkill);
3225
3226 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3227 &bluetooth_attr_group);
3228 }
3229
3230 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3231 {
3232 int res;
3233 int status = 0;
3234
3235 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3236 "initializing bluetooth subdriver\n");
3237
3238 TPACPI_ACPIHANDLE_INIT(hkey);
3239
3240 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3241 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3242 tp_features.bluetooth = hkey_handle &&
3243 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3244
3245 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3246 "bluetooth is %s, status 0x%02x\n",
3247 str_supported(tp_features.bluetooth),
3248 status);
3249
3250 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3251 if (dbg_bluetoothemul) {
3252 tp_features.bluetooth = 1;
3253 printk(TPACPI_INFO
3254 "bluetooth switch emulation enabled\n");
3255 } else
3256 #endif
3257 if (tp_features.bluetooth &&
3258 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3259 /* no bluetooth hardware present in system */
3260 tp_features.bluetooth = 0;
3261 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3262 "bluetooth hardware not installed\n");
3263 }
3264
3265 if (!tp_features.bluetooth)
3266 return 1;
3267
3268 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3269 &bluetooth_attr_group);
3270 if (res)
3271 return res;
3272
3273 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3274 &tpacpi_bluetooth_rfkill,
3275 RFKILL_TYPE_BLUETOOTH,
3276 TPACPI_RFK_BLUETOOTH_SW_NAME,
3277 true,
3278 tpacpi_bluetooth_rfk_set,
3279 tpacpi_bluetooth_rfk_get);
3280 if (res) {
3281 bluetooth_exit();
3282 return res;
3283 }
3284
3285 return 0;
3286 }
3287
3288 /* procfs -------------------------------------------------------------- */
3289 static int bluetooth_read(char *p)
3290 {
3291 int len = 0;
3292 int status = bluetooth_get_radiosw();
3293
3294 if (!tp_features.bluetooth)
3295 len += sprintf(p + len, "status:\t\tnot supported\n");
3296 else {
3297 len += sprintf(p + len, "status:\t\t%s\n",
3298 (status == RFKILL_STATE_UNBLOCKED) ?
3299 "enabled" : "disabled");
3300 len += sprintf(p + len, "commands:\tenable, disable\n");
3301 }
3302
3303 return len;
3304 }
3305
3306 static int bluetooth_write(char *buf)
3307 {
3308 char *cmd;
3309 int state = -1;
3310
3311 if (!tp_features.bluetooth)
3312 return -ENODEV;
3313
3314 while ((cmd = next_cmd(&buf))) {
3315 if (strlencmp(cmd, "enable") == 0) {
3316 state = 1;
3317 } else if (strlencmp(cmd, "disable") == 0) {
3318 state = 0;
3319 } else
3320 return -EINVAL;
3321 }
3322
3323 if (state != -1) {
3324 tpacpi_disclose_usertask("procfs bluetooth",
3325 "attempt to %s\n",
3326 state ? "enable" : "disable");
3327 bluetooth_set_radiosw(state, 1);
3328 }
3329
3330 return 0;
3331 }
3332
3333 static struct ibm_struct bluetooth_driver_data = {
3334 .name = "bluetooth",
3335 .read = bluetooth_read,
3336 .write = bluetooth_write,
3337 .exit = bluetooth_exit,
3338 .suspend = bluetooth_suspend,
3339 .shutdown = bluetooth_shutdown,
3340 };
3341
3342 /*************************************************************************
3343 * Wan subdriver
3344 */
3345
3346 enum {
3347 /* ACPI GWAN/SWAN bits */
3348 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
3349 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
3350 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume:
3351 off / last state */
3352 };
3353
3354 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
3355
3356 static struct rfkill *tpacpi_wan_rfkill;
3357
3358 static void wan_suspend(pm_message_t state)
3359 {
3360 /* Try to make sure radio will resume powered off */
3361 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3362 TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3363 vdbg_printk(TPACPI_DBG_RFKILL,
3364 "WWAN power down on resume request failed\n");
3365 }
3366
3367 static int wan_get_radiosw(void)
3368 {
3369 int status;
3370
3371 if (!tp_features.wan)
3372 return -ENODEV;
3373
3374 /* WLSW overrides WWAN in firmware/hardware, reflect that */
3375 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3376 return RFKILL_STATE_HARD_BLOCKED;
3377
3378 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3379 if (dbg_wwanemul)
3380 return (tpacpi_wwan_emulstate) ?
3381 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3382 #endif
3383
3384 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3385 return -EIO;
3386
3387 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3388 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3389 }
3390
3391 static void wan_update_rfk(void)
3392 {
3393 int status;
3394
3395 if (!tpacpi_wan_rfkill)
3396 return;
3397
3398 status = wan_get_radiosw();
3399 if (status < 0)
3400 return;
3401 rfkill_force_state(tpacpi_wan_rfkill, status);
3402
3403 vdbg_printk(TPACPI_DBG_RFKILL,
3404 "forced rfkill state to %d\n",
3405 status);
3406 }
3407
3408 static int wan_set_radiosw(int radio_on, int update_rfk)
3409 {
3410 int status;
3411
3412 if (!tp_features.wan)
3413 return -ENODEV;
3414
3415 /* WLSW overrides bluetooth in firmware/hardware, but there is no
3416 * reason to risk weird behaviour. */
3417 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3418 && radio_on)
3419 return -EPERM;
3420
3421 vdbg_printk(TPACPI_DBG_RFKILL,
3422 "will %s WWAN\n", radio_on ? "enable" : "disable");
3423
3424 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3425 if (dbg_wwanemul) {
3426 tpacpi_wwan_emulstate = !!radio_on;
3427 if (update_rfk)
3428 wan_update_rfk();
3429 return 0;
3430 }
3431 #endif
3432
3433 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3434 if (radio_on)
3435 status = TP_ACPI_WANCARD_RADIOSSW;
3436 else
3437 status = 0;
3438 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3439 return -EIO;
3440
3441 if (update_rfk)
3442 wan_update_rfk();
3443
3444 return 0;
3445 }
3446
3447 /* sysfs wan enable ---------------------------------------------------- */
3448 static ssize_t wan_enable_show(struct device *dev,
3449 struct device_attribute *attr,
3450 char *buf)
3451 {
3452 int status;
3453
3454 printk_deprecated_rfkill_attribute("wwan_enable");
3455
3456 status = wan_get_radiosw();
3457 if (status < 0)
3458 return status;
3459
3460 return snprintf(buf, PAGE_SIZE, "%d\n",
3461 (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3462 }
3463
3464 static ssize_t wan_enable_store(struct device *dev,
3465 struct device_attribute *attr,
3466 const char *buf, size_t count)
3467 {
3468 unsigned long t;
3469 int res;
3470
3471 printk_deprecated_rfkill_attribute("wwan_enable");
3472
3473 if (parse_strtoul(buf, 1, &t))
3474 return -EINVAL;
3475
3476 tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
3477
3478 res = wan_set_radiosw(t, 1);
3479
3480 return (res) ? res : count;
3481 }
3482
3483 static struct device_attribute dev_attr_wan_enable =
3484 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3485 wan_enable_show, wan_enable_store);
3486
3487 /* --------------------------------------------------------------------- */
3488
3489 static struct attribute *wan_attributes[] = {
3490 &dev_attr_wan_enable.attr,
3491 NULL
3492 };
3493
3494 static const struct attribute_group wan_attr_group = {
3495 .attrs = wan_attributes,
3496 };
3497
3498 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3499 {
3500 int wans = wan_get_radiosw();
3501
3502 if (wans < 0)
3503 return wans;
3504
3505 *state = wans;
3506 return 0;
3507 }
3508
3509 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3510 {
3511 dbg_printk(TPACPI_DBG_RFKILL,
3512 "request to change radio state to %d\n", state);
3513 return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3514 }
3515
3516 static void wan_shutdown(void)
3517 {
3518 /* Order firmware to save current state to NVRAM */
3519 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3520 TP_ACPI_WGSV_SAVE_STATE))
3521 printk(TPACPI_NOTICE
3522 "failed to save WWAN state to NVRAM\n");
3523 else
3524 vdbg_printk(TPACPI_DBG_RFKILL,
3525 "WWAN state saved to NVRAM\n");
3526 }
3527
3528 static void wan_exit(void)
3529 {
3530 wan_shutdown();
3531
3532 if (tpacpi_wan_rfkill)
3533 rfkill_unregister(tpacpi_wan_rfkill);
3534
3535 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3536 &wan_attr_group);
3537 }
3538
3539 static int __init wan_init(struct ibm_init_struct *iibm)
3540 {
3541 int res;
3542 int status = 0;
3543
3544 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3545 "initializing wan subdriver\n");
3546
3547 TPACPI_ACPIHANDLE_INIT(hkey);
3548
3549 tp_features.wan = hkey_handle &&
3550 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3551
3552 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3553 "wan is %s, status 0x%02x\n",
3554 str_supported(tp_features.wan),
3555 status);
3556
3557 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3558 if (dbg_wwanemul) {
3559 tp_features.wan = 1;
3560 printk(TPACPI_INFO
3561 "wwan switch emulation enabled\n");
3562 } else
3563 #endif
3564 if (tp_features.wan &&
3565 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3566 /* no wan hardware present in system */
3567 tp_features.wan = 0;
3568 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3569 "wan hardware not installed\n");
3570 }
3571
3572 if (!tp_features.wan)
3573 return 1;
3574
3575 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3576 &wan_attr_group);
3577 if (res)
3578 return res;
3579
3580 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3581 &tpacpi_wan_rfkill,
3582 RFKILL_TYPE_WWAN,
3583 TPACPI_RFK_WWAN_SW_NAME,
3584 true,
3585 tpacpi_wan_rfk_set,
3586 tpacpi_wan_rfk_get);
3587 if (res) {
3588 wan_exit();
3589 return res;
3590 }
3591
3592 return 0;
3593 }
3594
3595 /* procfs -------------------------------------------------------------- */
3596 static int wan_read(char *p)
3597 {
3598 int len = 0;
3599 int status = wan_get_radiosw();
3600
3601 tpacpi_disclose_usertask("procfs wan", "read");
3602
3603 if (!tp_features.wan)
3604 len += sprintf(p + len, "status:\t\tnot supported\n");
3605 else {
3606 len += sprintf(p + len, "status:\t\t%s\n",
3607 (status == RFKILL_STATE_UNBLOCKED) ?
3608 "enabled" : "disabled");
3609 len += sprintf(p + len, "commands:\tenable, disable\n");
3610 }
3611
3612 return len;
3613 }
3614
3615 static int wan_write(char *buf)
3616 {
3617 char *cmd;
3618 int state = -1;
3619
3620 if (!tp_features.wan)
3621 return -ENODEV;
3622
3623 while ((cmd = next_cmd(&buf))) {
3624 if (strlencmp(cmd, "enable") == 0) {
3625 state = 1;
3626 } else if (strlencmp(cmd, "disable") == 0) {
3627 state = 0;
3628 } else
3629 return -EINVAL;
3630 }
3631
3632 if (state != -1) {
3633 tpacpi_disclose_usertask("procfs wan",
3634 "attempt to %s\n",
3635 state ? "enable" : "disable");
3636 wan_set_radiosw(state, 1);
3637 }
3638
3639 return 0;
3640 }
3641
3642 static struct ibm_struct wan_driver_data = {
3643 .name = "wan",
3644 .read = wan_read,
3645 .write = wan_write,
3646 .exit = wan_exit,
3647 .suspend = wan_suspend,
3648 .shutdown = wan_shutdown,
3649 };
3650
3651 /*************************************************************************
3652 * UWB subdriver
3653 */
3654
3655 enum {
3656 /* ACPI GUWB/SUWB bits */
3657 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
3658 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
3659 };
3660
3661 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
3662
3663 static struct rfkill *tpacpi_uwb_rfkill;
3664
3665 static int uwb_get_radiosw(void)
3666 {
3667 int status;
3668
3669 if (!tp_features.uwb)
3670 return -ENODEV;
3671
3672 /* WLSW overrides UWB in firmware/hardware, reflect that */
3673 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3674 return RFKILL_STATE_HARD_BLOCKED;
3675
3676 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3677 if (dbg_uwbemul)
3678 return (tpacpi_uwb_emulstate) ?
3679 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3680 #endif
3681
3682 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3683 return -EIO;
3684
3685 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3686 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3687 }
3688
3689 static void uwb_update_rfk(void)
3690 {
3691 int status;
3692
3693 if (!tpacpi_uwb_rfkill)
3694 return;
3695
3696 status = uwb_get_radiosw();
3697 if (status < 0)
3698 return;
3699 rfkill_force_state(tpacpi_uwb_rfkill, status);
3700
3701 vdbg_printk(TPACPI_DBG_RFKILL,
3702 "forced rfkill state to %d\n",
3703 status);
3704 }
3705
3706 static int uwb_set_radiosw(int radio_on, int update_rfk)
3707 {
3708 int status;
3709
3710 if (!tp_features.uwb)
3711 return -ENODEV;
3712
3713 /* WLSW overrides UWB in firmware/hardware, but there is no
3714 * reason to risk weird behaviour. */
3715 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3716 && radio_on)
3717 return -EPERM;
3718
3719 vdbg_printk(TPACPI_DBG_RFKILL,
3720 "will %s UWB\n", radio_on ? "enable" : "disable");
3721
3722 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3723 if (dbg_uwbemul) {
3724 tpacpi_uwb_emulstate = !!radio_on;
3725 if (update_rfk)
3726 uwb_update_rfk();
3727 return 0;
3728 }
3729 #endif
3730
3731 status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3732 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3733 return -EIO;
3734
3735 if (update_rfk)
3736 uwb_update_rfk();
3737
3738 return 0;
3739 }
3740
3741 /* --------------------------------------------------------------------- */
3742
3743 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3744 {
3745 int uwbs = uwb_get_radiosw();
3746
3747 if (uwbs < 0)
3748 return uwbs;
3749
3750 *state = uwbs;
3751 return 0;
3752 }
3753
3754 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3755 {
3756 dbg_printk(TPACPI_DBG_RFKILL,
3757 "request to change radio state to %d\n", state);
3758 return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3759 }
3760
3761 static void uwb_exit(void)
3762 {
3763 if (tpacpi_uwb_rfkill)
3764 rfkill_unregister(tpacpi_uwb_rfkill);
3765 }
3766
3767 static int __init uwb_init(struct ibm_init_struct *iibm)
3768 {
3769 int res;
3770 int status = 0;
3771
3772 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3773 "initializing uwb subdriver\n");
3774
3775 TPACPI_ACPIHANDLE_INIT(hkey);
3776
3777 tp_features.uwb = hkey_handle &&
3778 acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3779
3780 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3781 "uwb is %s, status 0x%02x\n",
3782 str_supported(tp_features.uwb),
3783 status);
3784
3785 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3786 if (dbg_uwbemul) {
3787 tp_features.uwb = 1;
3788 printk(TPACPI_INFO
3789 "uwb switch emulation enabled\n");
3790 } else
3791 #endif
3792 if (tp_features.uwb &&
3793 !(status & TP_ACPI_UWB_HWPRESENT)) {
3794 /* no uwb hardware present in system */
3795 tp_features.uwb = 0;
3796 dbg_printk(TPACPI_DBG_INIT,
3797 "uwb hardware not installed\n");
3798 }
3799
3800 if (!tp_features.uwb)
3801 return 1;
3802
3803 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3804 &tpacpi_uwb_rfkill,
3805 RFKILL_TYPE_UWB,
3806 TPACPI_RFK_UWB_SW_NAME,
3807 false,
3808 tpacpi_uwb_rfk_set,
3809 tpacpi_uwb_rfk_get);
3810
3811 return res;
3812 }
3813
3814 static struct ibm_struct uwb_driver_data = {
3815 .name = "uwb",
3816 .exit = uwb_exit,
3817 .flags.experimental = 1,
3818 };
3819
3820 /*************************************************************************
3821 * Video subdriver
3822 */
3823
3824 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3825
3826 enum video_access_mode {
3827 TPACPI_VIDEO_NONE = 0,
3828 TPACPI_VIDEO_570, /* 570 */
3829 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
3830 TPACPI_VIDEO_NEW, /* all others */
3831 };
3832
3833 enum { /* video status flags, based on VIDEO_570 */
3834 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
3835 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
3836 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
3837 };
3838
3839 enum { /* TPACPI_VIDEO_570 constants */
3840 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
3841 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
3842 * video_status_flags */
3843 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
3844 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
3845 };
3846
3847 static enum video_access_mode video_supported;
3848 static int video_orig_autosw;
3849
3850 static int video_autosw_get(void);
3851 static int video_autosw_set(int enable);
3852
3853 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
3854
3855 static int __init video_init(struct ibm_init_struct *iibm)
3856 {
3857 int ivga;
3858
3859 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3860
3861 TPACPI_ACPIHANDLE_INIT(vid);
3862 TPACPI_ACPIHANDLE_INIT(vid2);
3863
3864 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3865 /* G41, assume IVGA doesn't change */
3866 vid_handle = vid2_handle;
3867
3868 if (!vid_handle)
3869 /* video switching not supported on R30, R31 */
3870 video_supported = TPACPI_VIDEO_NONE;
3871 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3872 /* 570 */
3873 video_supported = TPACPI_VIDEO_570;
3874 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3875 /* 600e/x, 770e, 770x */
3876 video_supported = TPACPI_VIDEO_770;
3877 else
3878 /* all others */
3879 video_supported = TPACPI_VIDEO_NEW;
3880
3881 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3882 str_supported(video_supported != TPACPI_VIDEO_NONE),
3883 video_supported);
3884
3885 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3886 }
3887
3888 static void video_exit(void)
3889 {
3890 dbg_printk(TPACPI_DBG_EXIT,
3891 "restoring original video autoswitch mode\n");
3892 if (video_autosw_set(video_orig_autosw))
3893 printk(TPACPI_ERR "error while trying to restore original "
3894 "video autoswitch mode\n");
3895 }
3896
3897 static int video_outputsw_get(void)
3898 {
3899 int status = 0;
3900 int i;
3901
3902 switch (video_supported) {
3903 case TPACPI_VIDEO_570:
3904 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3905 TP_ACPI_VIDEO_570_PHSCMD))
3906 return -EIO;
3907 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3908 break;
3909 case TPACPI_VIDEO_770:
3910 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3911 return -EIO;
3912 if (i)
3913 status |= TP_ACPI_VIDEO_S_LCD;
3914 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3915 return -EIO;
3916 if (i)
3917 status |= TP_ACPI_VIDEO_S_CRT;
3918 break;
3919 case TPACPI_VIDEO_NEW:
3920 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3921 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3922 return -EIO;
3923 if (i)
3924 status |= TP_ACPI_VIDEO_S_CRT;
3925
3926 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3927 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3928 return -EIO;
3929 if (i)
3930 status |= TP_ACPI_VIDEO_S_LCD;
3931 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3932 return -EIO;
3933 if (i)
3934 status |= TP_ACPI_VIDEO_S_DVI;
3935 break;
3936 default:
3937 return -ENOSYS;
3938 }
3939
3940 return status;
3941 }
3942
3943 static int video_outputsw_set(int status)
3944 {
3945 int autosw;
3946 int res = 0;
3947
3948 switch (video_supported) {
3949 case TPACPI_VIDEO_570:
3950 res = acpi_evalf(NULL, NULL,
3951 "\\_SB.PHS2", "vdd",
3952 TP_ACPI_VIDEO_570_PHS2CMD,
3953 status | TP_ACPI_VIDEO_570_PHS2SET);
3954 break;
3955 case TPACPI_VIDEO_770:
3956 autosw = video_autosw_get();
3957 if (autosw < 0)
3958 return autosw;
3959
3960 res = video_autosw_set(1);
3961 if (res)
3962 return res;
3963 res = acpi_evalf(vid_handle, NULL,
3964 "ASWT", "vdd", status * 0x100, 0);
3965 if (!autosw && video_autosw_set(autosw)) {
3966 printk(TPACPI_ERR
3967 "video auto-switch left enabled due to error\n");
3968 return -EIO;
3969 }
3970 break;
3971 case TPACPI_VIDEO_NEW:
3972 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3973 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3974 break;
3975 default:
3976 return -ENOSYS;
3977 }
3978
3979 return (res)? 0 : -EIO;
3980 }
3981
3982 static int video_autosw_get(void)
3983 {
3984 int autosw = 0;
3985
3986 switch (video_supported) {
3987 case TPACPI_VIDEO_570:
3988 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3989 return -EIO;
3990 break;
3991 case TPACPI_VIDEO_770:
3992 case TPACPI_VIDEO_NEW:
3993 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3994 return -EIO;
3995 break;
3996 default:
3997 return -ENOSYS;
3998 }
3999
4000 return autosw & 1;
4001 }
4002
4003 static int video_autosw_set(int enable)
4004 {
4005 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4006 return -EIO;
4007 return 0;
4008 }
4009
4010 static int video_outputsw_cycle(void)
4011 {
4012 int autosw = video_autosw_get();
4013 int res;
4014
4015 if (autosw < 0)
4016 return autosw;
4017
4018 switch (video_supported) {
4019 case TPACPI_VIDEO_570:
4020 res = video_autosw_set(1);
4021 if (res)
4022 return res;
4023 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4024 break;
4025 case TPACPI_VIDEO_770:
4026 case TPACPI_VIDEO_NEW:
4027 res = video_autosw_set(1);
4028 if (res)
4029 return res;
4030 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4031 break;
4032 default:
4033 return -ENOSYS;
4034 }
4035 if (!autosw && video_autosw_set(autosw)) {
4036 printk(TPACPI_ERR
4037 "video auto-switch left enabled due to error\n");
4038 return -EIO;
4039 }
4040
4041 return (res)? 0 : -EIO;
4042 }
4043
4044 static int video_expand_toggle(void)
4045 {
4046 switch (video_supported) {
4047 case TPACPI_VIDEO_570:
4048 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4049 0 : -EIO;
4050 case TPACPI_VIDEO_770:
4051 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4052 0 : -EIO;
4053 case TPACPI_VIDEO_NEW:
4054 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4055 0 : -EIO;
4056 default:
4057 return -ENOSYS;
4058 }
4059 /* not reached */
4060 }
4061
4062 static int video_read(char *p)
4063 {
4064 int status, autosw;
4065 int len = 0;
4066
4067 if (video_supported == TPACPI_VIDEO_NONE) {
4068 len += sprintf(p + len, "status:\t\tnot supported\n");
4069 return len;
4070 }
4071
4072 status = video_outputsw_get();
4073 if (status < 0)
4074 return status;
4075
4076 autosw = video_autosw_get();
4077 if (autosw < 0)
4078 return autosw;
4079
4080 len += sprintf(p + len, "status:\t\tsupported\n");
4081 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4082 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4083 if (video_supported == TPACPI_VIDEO_NEW)
4084 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4085 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4086 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4087 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4088 if (video_supported == TPACPI_VIDEO_NEW)
4089 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4090 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4091 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4092
4093 return len;
4094 }
4095
4096 static int video_write(char *buf)
4097 {
4098 char *cmd;
4099 int enable, disable, status;
4100 int res;
4101
4102 if (video_supported == TPACPI_VIDEO_NONE)
4103 return -ENODEV;
4104
4105 enable = 0;
4106 disable = 0;
4107
4108 while ((cmd = next_cmd(&buf))) {
4109 if (strlencmp(cmd, "lcd_enable") == 0) {
4110 enable |= TP_ACPI_VIDEO_S_LCD;
4111 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4112 disable |= TP_ACPI_VIDEO_S_LCD;
4113 } else if (strlencmp(cmd, "crt_enable") == 0) {
4114 enable |= TP_ACPI_VIDEO_S_CRT;
4115 } else if (strlencmp(cmd, "crt_disable") == 0) {
4116 disable |= TP_ACPI_VIDEO_S_CRT;
4117 } else if (video_supported == TPACPI_VIDEO_NEW &&
4118 strlencmp(cmd, "dvi_enable") == 0) {
4119 enable |= TP_ACPI_VIDEO_S_DVI;
4120 } else if (video_supported == TPACPI_VIDEO_NEW &&
4121 strlencmp(cmd, "dvi_disable") == 0) {
4122 disable |= TP_ACPI_VIDEO_S_DVI;
4123 } else if (strlencmp(cmd, "auto_enable") == 0) {
4124 res = video_autosw_set(1);
4125 if (res)
4126 return res;
4127 } else if (strlencmp(cmd, "auto_disable") == 0) {
4128 res = video_autosw_set(0);
4129 if (res)
4130 return res;
4131 } else if (strlencmp(cmd, "video_switch") == 0) {
4132 res = video_outputsw_cycle();
4133 if (res)
4134 return res;
4135 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4136 res = video_expand_toggle();
4137 if (res)
4138 return res;
4139 } else
4140 return -EINVAL;
4141 }
4142
4143 if (enable || disable) {
4144 status = video_outputsw_get();
4145 if (status < 0)
4146 return status;
4147 res = video_outputsw_set((status & ~disable) | enable);
4148 if (res)
4149 return res;
4150 }
4151
4152 return 0;
4153 }
4154
4155 static struct ibm_struct video_driver_data = {
4156 .name = "video",
4157 .read = video_read,
4158 .write = video_write,
4159 .exit = video_exit,
4160 };
4161
4162 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4163
4164 /*************************************************************************
4165 * Light (thinklight) subdriver
4166 */
4167
4168 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
4169 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
4170
4171 static int light_get_status(void)
4172 {
4173 int status = 0;
4174
4175 if (tp_features.light_status) {
4176 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4177 return -EIO;
4178 return (!!status);
4179 }
4180
4181 return -ENXIO;
4182 }
4183
4184 static int light_set_status(int status)
4185 {
4186 int rc;
4187
4188 if (tp_features.light) {
4189 if (cmos_handle) {
4190 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4191 (status)?
4192 TP_CMOS_THINKLIGHT_ON :
4193 TP_CMOS_THINKLIGHT_OFF);
4194 } else {
4195 rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4196 (status)? 1 : 0);
4197 }
4198 return (rc)? 0 : -EIO;
4199 }
4200
4201 return -ENXIO;
4202 }
4203
4204 static void light_set_status_worker(struct work_struct *work)
4205 {
4206 struct tpacpi_led_classdev *data =
4207 container_of(work, struct tpacpi_led_classdev, work);
4208
4209 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4210 light_set_status((data->new_brightness != LED_OFF));
4211 }
4212
4213 static void light_sysfs_set(struct led_classdev *led_cdev,
4214 enum led_brightness brightness)
4215 {
4216 struct tpacpi_led_classdev *data =
4217 container_of(led_cdev,
4218 struct tpacpi_led_classdev,
4219 led_classdev);
4220 data->new_brightness = brightness;
4221 queue_work(tpacpi_wq, &data->work);
4222 }
4223
4224 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4225 {
4226 return (light_get_status() == 1)? LED_FULL : LED_OFF;
4227 }
4228
4229 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4230 .led_classdev = {
4231 .name = "tpacpi::thinklight",
4232 .brightness_set = &light_sysfs_set,
4233 .brightness_get = &light_sysfs_get,
4234 }
4235 };
4236
4237 static int __init light_init(struct ibm_init_struct *iibm)
4238 {
4239 int rc;
4240
4241 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4242
4243 TPACPI_ACPIHANDLE_INIT(ledb);
4244 TPACPI_ACPIHANDLE_INIT(lght);
4245 TPACPI_ACPIHANDLE_INIT(cmos);
4246 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4247
4248 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4249 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4250
4251 if (tp_features.light)
4252 /* light status not supported on
4253 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4254 tp_features.light_status =
4255 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4256
4257 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4258 str_supported(tp_features.light),
4259 str_supported(tp_features.light_status));
4260
4261 if (!tp_features.light)
4262 return 1;
4263
4264 rc = led_classdev_register(&tpacpi_pdev->dev,
4265 &tpacpi_led_thinklight.led_classdev);
4266
4267 if (rc < 0) {
4268 tp_features.light = 0;
4269 tp_features.light_status = 0;
4270 } else {
4271 rc = 0;
4272 }
4273
4274 return rc;
4275 }
4276
4277 static void light_exit(void)
4278 {
4279 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4280 if (work_pending(&tpacpi_led_thinklight.work))
4281 flush_workqueue(tpacpi_wq);
4282 }
4283
4284 static int light_read(char *p)
4285 {
4286 int len = 0;
4287 int status;
4288
4289 if (!tp_features.light) {
4290 len += sprintf(p + len, "status:\t\tnot supported\n");
4291 } else if (!tp_features.light_status) {
4292 len += sprintf(p + len, "status:\t\tunknown\n");
4293 len += sprintf(p + len, "commands:\ton, off\n");
4294 } else {
4295 status = light_get_status();
4296 if (status < 0)
4297 return status;
4298 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4299 len += sprintf(p + len, "commands:\ton, off\n");
4300 }
4301
4302 return len;
4303 }
4304
4305 static int light_write(char *buf)
4306 {
4307 char *cmd;
4308 int newstatus = 0;
4309
4310 if (!tp_features.light)
4311 return -ENODEV;
4312
4313 while ((cmd = next_cmd(&buf))) {
4314 if (strlencmp(cmd, "on") == 0) {
4315 newstatus = 1;
4316 } else if (strlencmp(cmd, "off") == 0) {
4317 newstatus = 0;
4318 } else
4319 return -EINVAL;
4320 }
4321
4322 return light_set_status(newstatus);
4323 }
4324
4325 static struct ibm_struct light_driver_data = {
4326 .name = "light",
4327 .read = light_read,
4328 .write = light_write,
4329 .exit = light_exit,
4330 };
4331
4332 /*************************************************************************
4333 * Dock subdriver
4334 */
4335
4336 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4337
4338 static void dock_notify(struct ibm_struct *ibm, u32 event);
4339 static int dock_read(char *p);
4340 static int dock_write(char *buf);
4341
4342 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4343 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4344 "\\_SB.PCI0.PCI1.DOCK", /* all others */
4345 "\\_SB.PCI.ISA.SLCE", /* 570 */
4346 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4347
4348 /* don't list other alternatives as we install a notify handler on the 570 */
4349 TPACPI_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
4350
4351 static const struct acpi_device_id ibm_pci_device_ids[] = {
4352 {PCI_ROOT_HID_STRING, 0},
4353 {"", 0},
4354 };
4355
4356 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4357 {
4358 .notify = dock_notify,
4359 .handle = &dock_handle,
4360 .type = ACPI_SYSTEM_NOTIFY,
4361 },
4362 {
4363 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4364 * We just use it to get notifications of dock hotplug
4365 * in very old thinkpads */
4366 .hid = ibm_pci_device_ids,
4367 .notify = dock_notify,
4368 .handle = &pci_handle,
4369 .type = ACPI_SYSTEM_NOTIFY,
4370 },
4371 };
4372
4373 static struct ibm_struct dock_driver_data[2] = {
4374 {
4375 .name = "dock",
4376 .read = dock_read,
4377 .write = dock_write,
4378 .acpi = &ibm_dock_acpidriver[0],
4379 },
4380 {
4381 .name = "dock",
4382 .acpi = &ibm_dock_acpidriver[1],
4383 },
4384 };
4385
4386 #define dock_docked() (_sta(dock_handle) & 1)
4387
4388 static int __init dock_init(struct ibm_init_struct *iibm)
4389 {
4390 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4391
4392 TPACPI_ACPIHANDLE_INIT(dock);
4393
4394 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4395 str_supported(dock_handle != NULL));
4396
4397 return (dock_handle)? 0 : 1;
4398 }
4399
4400 static int __init dock_init2(struct ibm_init_struct *iibm)
4401 {
4402 int dock2_needed;
4403
4404 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4405
4406 if (dock_driver_data[0].flags.acpi_driver_registered &&
4407 dock_driver_data[0].flags.acpi_notify_installed) {
4408 TPACPI_ACPIHANDLE_INIT(pci);
4409 dock2_needed = (pci_handle != NULL);
4410 vdbg_printk(TPACPI_DBG_INIT,
4411 "dock PCI handler for the TP 570 is %s\n",
4412 str_supported(dock2_needed));
4413 } else {
4414 vdbg_printk(TPACPI_DBG_INIT,
4415 "dock subdriver part 2 not required\n");
4416 dock2_needed = 0;
4417 }
4418
4419 return (dock2_needed)? 0 : 1;
4420 }
4421
4422 static void dock_notify(struct ibm_struct *ibm, u32 event)
4423 {
4424 int docked = dock_docked();
4425 int pci = ibm->acpi->hid && ibm->acpi->device &&
4426 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4427 int data;
4428
4429 if (event == 1 && !pci) /* 570 */
4430 data = 1; /* button */
4431 else if (event == 1 && pci) /* 570 */
4432 data = 3; /* dock */
4433 else if (event == 3 && docked)
4434 data = 1; /* button */
4435 else if (event == 3 && !docked)
4436 data = 2; /* undock */
4437 else if (event == 0 && docked)
4438 data = 3; /* dock */
4439 else {
4440 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4441 event, _sta(dock_handle));
4442 data = 0; /* unknown */
4443 }
4444 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4445 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4446 dev_name(&ibm->acpi->device->dev),
4447 event, data);
4448 }
4449
4450 static int dock_read(char *p)
4451 {
4452 int len = 0;
4453 int docked = dock_docked();
4454
4455 if (!dock_handle)
4456 len += sprintf(p + len, "status:\t\tnot supported\n");
4457 else if (!docked)
4458 len += sprintf(p + len, "status:\t\tundocked\n");
4459 else {
4460 len += sprintf(p + len, "status:\t\tdocked\n");
4461 len += sprintf(p + len, "commands:\tdock, undock\n");
4462 }
4463
4464 return len;
4465 }
4466
4467 static int dock_write(char *buf)
4468 {
4469 char *cmd;
4470
4471 if (!dock_docked())
4472 return -ENODEV;
4473
4474 while ((cmd = next_cmd(&buf))) {
4475 if (strlencmp(cmd, "undock") == 0) {
4476 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4477 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4478 return -EIO;
4479 } else if (strlencmp(cmd, "dock") == 0) {
4480 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4481 return -EIO;
4482 } else
4483 return -EINVAL;
4484 }
4485
4486 return 0;
4487 }
4488
4489 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4490
4491 /*************************************************************************
4492 * Bay subdriver
4493 */
4494
4495 #ifdef CONFIG_THINKPAD_ACPI_BAY
4496
4497 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
4498 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4499 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4500 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4501 ); /* A21e, R30, R31 */
4502 TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
4503 "_EJ0", /* all others */
4504 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4505 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
4506 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4507 ); /* all others */
4508 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
4509 "_EJ0", /* 770x */
4510 ); /* all others */
4511
4512 static int __init bay_init(struct ibm_init_struct *iibm)
4513 {
4514 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4515
4516 TPACPI_ACPIHANDLE_INIT(bay);
4517 if (bay_handle)
4518 TPACPI_ACPIHANDLE_INIT(bay_ej);
4519 TPACPI_ACPIHANDLE_INIT(bay2);
4520 if (bay2_handle)
4521 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4522
4523 tp_features.bay_status = bay_handle &&
4524 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4525 tp_features.bay_status2 = bay2_handle &&
4526 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4527
4528 tp_features.bay_eject = bay_handle && bay_ej_handle &&
4529 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4530 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4531 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4532
4533 vdbg_printk(TPACPI_DBG_INIT,
4534 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4535 str_supported(tp_features.bay_status),
4536 str_supported(tp_features.bay_eject),
4537 str_supported(tp_features.bay_status2),
4538 str_supported(tp_features.bay_eject2));
4539
4540 return (tp_features.bay_status || tp_features.bay_eject ||
4541 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4542 }
4543
4544 static void bay_notify(struct ibm_struct *ibm, u32 event)
4545 {
4546 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4547 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4548 dev_name(&ibm->acpi->device->dev),
4549 event, 0);
4550 }
4551
4552 #define bay_occupied(b) (_sta(b##_handle) & 1)
4553
4554 static int bay_read(char *p)
4555 {
4556 int len = 0;
4557 int occupied = bay_occupied(bay);
4558 int occupied2 = bay_occupied(bay2);
4559 int eject, eject2;
4560
4561 len += sprintf(p + len, "status:\t\t%s\n",
4562 tp_features.bay_status ?
4563 (occupied ? "occupied" : "unoccupied") :
4564 "not supported");
4565 if (tp_features.bay_status2)
4566 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4567 "occupied" : "unoccupied");
4568
4569 eject = tp_features.bay_eject && occupied;
4570 eject2 = tp_features.bay_eject2 && occupied2;
4571
4572 if (eject && eject2)
4573 len += sprintf(p + len, "commands:\teject, eject2\n");
4574 else if (eject)
4575 len += sprintf(p + len, "commands:\teject\n");
4576 else if (eject2)
4577 len += sprintf(p + len, "commands:\teject2\n");
4578
4579 return len;
4580 }
4581
4582 static int bay_write(char *buf)
4583 {
4584 char *cmd;
4585
4586 if (!tp_features.bay_eject && !tp_features.bay_eject2)
4587 return -ENODEV;
4588
4589 while ((cmd = next_cmd(&buf))) {
4590 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4591 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4592 return -EIO;
4593 } else if (tp_features.bay_eject2 &&
4594 strlencmp(cmd, "eject2") == 0) {
4595 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4596 return -EIO;
4597 } else
4598 return -EINVAL;
4599 }
4600
4601 return 0;
4602 }
4603
4604 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4605 .notify = bay_notify,
4606 .handle = &bay_handle,
4607 .type = ACPI_SYSTEM_NOTIFY,
4608 };
4609
4610 static struct ibm_struct bay_driver_data = {
4611 .name = "bay",
4612 .read = bay_read,
4613 .write = bay_write,
4614 .acpi = &ibm_bay_acpidriver,
4615 };
4616
4617 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4618
4619 /*************************************************************************
4620 * CMOS subdriver
4621 */
4622
4623 /* sysfs cmos_command -------------------------------------------------- */
4624 static ssize_t cmos_command_store(struct device *dev,
4625 struct device_attribute *attr,
4626 const char *buf, size_t count)
4627 {
4628 unsigned long cmos_cmd;
4629 int res;
4630
4631 if (parse_strtoul(buf, 21, &cmos_cmd))
4632 return -EINVAL;
4633
4634 res = issue_thinkpad_cmos_command(cmos_cmd);
4635 return (res)? res : count;
4636 }
4637
4638 static struct device_attribute dev_attr_cmos_command =
4639 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4640
4641 /* --------------------------------------------------------------------- */
4642
4643 static int __init cmos_init(struct ibm_init_struct *iibm)
4644 {
4645 int res;
4646
4647 vdbg_printk(TPACPI_DBG_INIT,
4648 "initializing cmos commands subdriver\n");
4649
4650 TPACPI_ACPIHANDLE_INIT(cmos);
4651
4652 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4653 str_supported(cmos_handle != NULL));
4654
4655 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4656 if (res)
4657 return res;
4658
4659 return (cmos_handle)? 0 : 1;
4660 }
4661
4662 static void cmos_exit(void)
4663 {
4664 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4665 }
4666
4667 static int cmos_read(char *p)
4668 {
4669 int len = 0;
4670
4671 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4672 R30, R31, T20-22, X20-21 */
4673 if (!cmos_handle)
4674 len += sprintf(p + len, "status:\t\tnot supported\n");
4675 else {
4676 len += sprintf(p + len, "status:\t\tsupported\n");
4677 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4678 }
4679
4680 return len;
4681 }
4682
4683 static int cmos_write(char *buf)
4684 {
4685 char *cmd;
4686 int cmos_cmd, res;
4687
4688 while ((cmd = next_cmd(&buf))) {
4689 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4690 cmos_cmd >= 0 && cmos_cmd <= 21) {
4691 /* cmos_cmd set */
4692 } else
4693 return -EINVAL;
4694
4695 res = issue_thinkpad_cmos_command(cmos_cmd);
4696 if (res)
4697 return res;
4698 }
4699
4700 return 0;
4701 }
4702
4703 static struct ibm_struct cmos_driver_data = {
4704 .name = "cmos",
4705 .read = cmos_read,
4706 .write = cmos_write,
4707 .exit = cmos_exit,
4708 };
4709
4710 /*************************************************************************
4711 * LED subdriver
4712 */
4713
4714 enum led_access_mode {
4715 TPACPI_LED_NONE = 0,
4716 TPACPI_LED_570, /* 570 */
4717 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4718 TPACPI_LED_NEW, /* all others */
4719 };
4720
4721 enum { /* For TPACPI_LED_OLD */
4722 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
4723 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
4724 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
4725 };
4726
4727 enum led_status_t {
4728 TPACPI_LED_OFF = 0,
4729 TPACPI_LED_ON,
4730 TPACPI_LED_BLINK,
4731 };
4732
4733 static enum led_access_mode led_supported;
4734
4735 TPACPI_HANDLE(led, ec, "SLED", /* 570 */
4736 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4737 /* T20-22, X20-21 */
4738 "LED", /* all others */
4739 ); /* R30, R31 */
4740
4741 #define TPACPI_LED_NUMLEDS 8
4742 static struct tpacpi_led_classdev *tpacpi_leds;
4743 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4744 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4745 /* there's a limit of 19 chars + NULL before 2.6.26 */
4746 "tpacpi::power",
4747 "tpacpi:orange:batt",
4748 "tpacpi:green:batt",
4749 "tpacpi::dock_active",
4750 "tpacpi::bay_active",
4751 "tpacpi::dock_batt",
4752 "tpacpi::unknown_led",
4753 "tpacpi::standby",
4754 };
4755 #define TPACPI_SAFE_LEDS 0x0081U
4756
4757 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4758 {
4759 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4760 return false;
4761 #else
4762 return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
4763 #endif
4764 }
4765
4766 static int led_get_status(const unsigned int led)
4767 {
4768 int status;
4769 enum led_status_t led_s;
4770
4771 switch (led_supported) {
4772 case TPACPI_LED_570:
4773 if (!acpi_evalf(ec_handle,
4774 &status, "GLED", "dd", 1 << led))
4775 return -EIO;
4776 led_s = (status == 0)?
4777 TPACPI_LED_OFF :
4778 ((status == 1)?
4779 TPACPI_LED_ON :
4780 TPACPI_LED_BLINK);
4781 tpacpi_led_state_cache[led] = led_s;
4782 return led_s;
4783 default:
4784 return -ENXIO;
4785 }
4786
4787 /* not reached */
4788 }
4789
4790 static int led_set_status(const unsigned int led,
4791 const enum led_status_t ledstatus)
4792 {
4793 /* off, on, blink. Index is led_status_t */
4794 static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4795 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4796
4797 int rc = 0;
4798
4799 switch (led_supported) {
4800 case TPACPI_LED_570:
4801 /* 570 */
4802 if (unlikely(led > 7))
4803 return -EINVAL;
4804 if (unlikely(tpacpi_is_led_restricted(led)))
4805 return -EPERM;
4806 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4807 (1 << led), led_sled_arg1[ledstatus]))
4808 rc = -EIO;
4809 break;
4810 case TPACPI_LED_OLD:
4811 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4812 if (unlikely(led > 7))
4813 return -EINVAL;
4814 if (unlikely(tpacpi_is_led_restricted(led)))
4815 return -EPERM;
4816 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4817 if (rc >= 0)
4818 rc = ec_write(TPACPI_LED_EC_HLBL,
4819 (ledstatus == TPACPI_LED_BLINK) << led);
4820 if (rc >= 0)
4821 rc = ec_write(TPACPI_LED_EC_HLCL,
4822 (ledstatus != TPACPI_LED_OFF) << led);
4823 break;
4824 case TPACPI_LED_NEW:
4825 /* all others */
4826 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4827 return -EINVAL;
4828 if (unlikely(tpacpi_is_led_restricted(led)))
4829 return -EPERM;
4830 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4831 led, led_led_arg1[ledstatus]))
4832 rc = -EIO;
4833 break;
4834 default:
4835 rc = -ENXIO;
4836 }
4837
4838 if (!rc)
4839 tpacpi_led_state_cache[led] = ledstatus;
4840
4841 return rc;
4842 }
4843
4844 static void led_sysfs_set_status(unsigned int led,
4845 enum led_brightness brightness)
4846 {
4847 led_set_status(led,
4848 (brightness == LED_OFF) ?
4849 TPACPI_LED_OFF :
4850 (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4851 TPACPI_LED_BLINK : TPACPI_LED_ON);
4852 }
4853
4854 static void led_set_status_worker(struct work_struct *work)
4855 {
4856 struct tpacpi_led_classdev *data =
4857 container_of(work, struct tpacpi_led_classdev, work);
4858
4859 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4860 led_sysfs_set_status(data->led, data->new_brightness);
4861 }
4862
4863 static void led_sysfs_set(struct led_classdev *led_cdev,
4864 enum led_brightness brightness)
4865 {
4866 struct tpacpi_led_classdev *data = container_of(led_cdev,
4867 struct tpacpi_led_classdev, led_classdev);
4868
4869 data->new_brightness = brightness;
4870 queue_work(tpacpi_wq, &data->work);
4871 }
4872
4873 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4874 unsigned long *delay_on, unsigned long *delay_off)
4875 {
4876 struct tpacpi_led_classdev *data = container_of(led_cdev,
4877 struct tpacpi_led_classdev, led_classdev);
4878
4879 /* Can we choose the flash rate? */
4880 if (*delay_on == 0 && *delay_off == 0) {
4881 /* yes. set them to the hardware blink rate (1 Hz) */
4882 *delay_on = 500; /* ms */
4883 *delay_off = 500; /* ms */
4884 } else if ((*delay_on != 500) || (*delay_off != 500))
4885 return -EINVAL;
4886
4887 data->new_brightness = TPACPI_LED_BLINK;
4888 queue_work(tpacpi_wq, &data->work);
4889
4890 return 0;
4891 }
4892
4893 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4894 {
4895 int rc;
4896
4897 struct tpacpi_led_classdev *data = container_of(led_cdev,
4898 struct tpacpi_led_classdev, led_classdev);
4899
4900 rc = led_get_status(data->led);
4901
4902 if (rc == TPACPI_LED_OFF || rc < 0)
4903 rc = LED_OFF; /* no error handling in led class :( */
4904 else
4905 rc = LED_FULL;
4906
4907 return rc;
4908 }
4909
4910 static void led_exit(void)
4911 {
4912 unsigned int i;
4913
4914 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4915 if (tpacpi_leds[i].led_classdev.name)
4916 led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4917 }
4918
4919 kfree(tpacpi_leds);
4920 }
4921
4922 static int __init tpacpi_init_led(unsigned int led)
4923 {
4924 int rc;
4925
4926 tpacpi_leds[led].led = led;
4927
4928 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4929 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4930 if (led_supported == TPACPI_LED_570)
4931 tpacpi_leds[led].led_classdev.brightness_get =
4932 &led_sysfs_get;
4933
4934 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4935
4936 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4937
4938 rc = led_classdev_register(&tpacpi_pdev->dev,
4939 &tpacpi_leds[led].led_classdev);
4940 if (rc < 0)
4941 tpacpi_leds[led].led_classdev.name = NULL;
4942
4943 return rc;
4944 }
4945
4946 static int __init led_init(struct ibm_init_struct *iibm)
4947 {
4948 unsigned int i;
4949 int rc;
4950
4951 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4952
4953 TPACPI_ACPIHANDLE_INIT(led);
4954
4955 if (!led_handle)
4956 /* led not supported on R30, R31 */
4957 led_supported = TPACPI_LED_NONE;
4958 else if (strlencmp(led_path, "SLED") == 0)
4959 /* 570 */
4960 led_supported = TPACPI_LED_570;
4961 else if (strlencmp(led_path, "SYSL") == 0)
4962 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4963 led_supported = TPACPI_LED_OLD;
4964 else
4965 /* all others */
4966 led_supported = TPACPI_LED_NEW;
4967
4968 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4969 str_supported(led_supported), led_supported);
4970
4971 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4972 GFP_KERNEL);
4973 if (!tpacpi_leds) {
4974 printk(TPACPI_ERR "Out of memory for LED data\n");
4975 return -ENOMEM;
4976 }
4977
4978 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4979 if (!tpacpi_is_led_restricted(i)) {
4980 rc = tpacpi_init_led(i);
4981 if (rc < 0) {
4982 led_exit();
4983 return rc;
4984 }
4985 }
4986 }
4987
4988 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4989 if (led_supported != TPACPI_LED_NONE)
4990 printk(TPACPI_NOTICE
4991 "warning: userspace override of important "
4992 "firmware LEDs is enabled\n");
4993 #endif
4994 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4995 }
4996
4997 #define str_led_status(s) \
4998 ((s) == TPACPI_LED_OFF ? "off" : \
4999 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5000
5001 static int led_read(char *p)
5002 {
5003 int len = 0;
5004
5005 if (!led_supported) {
5006 len += sprintf(p + len, "status:\t\tnot supported\n");
5007 return len;
5008 }
5009 len += sprintf(p + len, "status:\t\tsupported\n");
5010
5011 if (led_supported == TPACPI_LED_570) {
5012 /* 570 */
5013 int i, status;
5014 for (i = 0; i < 8; i++) {
5015 status = led_get_status(i);
5016 if (status < 0)
5017 return -EIO;
5018 len += sprintf(p + len, "%d:\t\t%s\n",
5019 i, str_led_status(status));
5020 }
5021 }
5022
5023 len += sprintf(p + len, "commands:\t"
5024 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
5025
5026 return len;
5027 }
5028
5029 static int led_write(char *buf)
5030 {
5031 char *cmd;
5032 int led, rc;
5033 enum led_status_t s;
5034
5035 if (!led_supported)
5036 return -ENODEV;
5037
5038 while ((cmd = next_cmd(&buf))) {
5039 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
5040 return -EINVAL;
5041
5042 if (strstr(cmd, "off")) {
5043 s = TPACPI_LED_OFF;
5044 } else if (strstr(cmd, "on")) {
5045 s = TPACPI_LED_ON;
5046 } else if (strstr(cmd, "blink")) {
5047 s = TPACPI_LED_BLINK;
5048 } else {
5049 return -EINVAL;
5050 }
5051
5052 rc = led_set_status(led, s);
5053 if (rc < 0)
5054 return rc;
5055 }
5056
5057 return 0;
5058 }
5059
5060 static struct ibm_struct led_driver_data = {
5061 .name = "led",
5062 .read = led_read,
5063 .write = led_write,
5064 .exit = led_exit,
5065 };
5066
5067 /*************************************************************************
5068 * Beep subdriver
5069 */
5070
5071 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
5072
5073 static int __init beep_init(struct ibm_init_struct *iibm)
5074 {
5075 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5076
5077 TPACPI_ACPIHANDLE_INIT(beep);
5078
5079 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5080 str_supported(beep_handle != NULL));
5081
5082 return (beep_handle)? 0 : 1;
5083 }
5084
5085 static int beep_read(char *p)
5086 {
5087 int len = 0;
5088
5089 if (!beep_handle)
5090 len += sprintf(p + len, "status:\t\tnot supported\n");
5091 else {
5092 len += sprintf(p + len, "status:\t\tsupported\n");
5093 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5094 }
5095
5096 return len;
5097 }
5098
5099 static int beep_write(char *buf)
5100 {
5101 char *cmd;
5102 int beep_cmd;
5103
5104 if (!beep_handle)
5105 return -ENODEV;
5106
5107 while ((cmd = next_cmd(&buf))) {
5108 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5109 beep_cmd >= 0 && beep_cmd <= 17) {
5110 /* beep_cmd set */
5111 } else
5112 return -EINVAL;
5113 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
5114 return -EIO;
5115 }
5116
5117 return 0;
5118 }
5119
5120 static struct ibm_struct beep_driver_data = {
5121 .name = "beep",
5122 .read = beep_read,
5123 .write = beep_write,
5124 };
5125
5126 /*************************************************************************
5127 * Thermal subdriver
5128 */
5129
5130 enum thermal_access_mode {
5131 TPACPI_THERMAL_NONE = 0, /* No thermal support */
5132 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
5133 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
5134 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
5135 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
5136 };
5137
5138 enum { /* TPACPI_THERMAL_TPEC_* */
5139 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
5140 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
5141 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
5142 };
5143
5144 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
5145 struct ibm_thermal_sensors_struct {
5146 s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5147 };
5148
5149 static enum thermal_access_mode thermal_read_mode;
5150
5151 /* idx is zero-based */
5152 static int thermal_get_sensor(int idx, s32 *value)
5153 {
5154 int t;
5155 s8 tmp;
5156 char tmpi[5];
5157
5158 t = TP_EC_THERMAL_TMP0;
5159
5160 switch (thermal_read_mode) {
5161 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5162 case TPACPI_THERMAL_TPEC_16:
5163 if (idx >= 8 && idx <= 15) {
5164 t = TP_EC_THERMAL_TMP8;
5165 idx -= 8;
5166 }
5167 /* fallthrough */
5168 #endif
5169 case TPACPI_THERMAL_TPEC_8:
5170 if (idx <= 7) {
5171 if (!acpi_ec_read(t + idx, &tmp))
5172 return -EIO;
5173 *value = tmp * 1000;
5174 return 0;
5175 }
5176 break;
5177
5178 case TPACPI_THERMAL_ACPI_UPDT:
5179 if (idx <= 7) {
5180 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5181 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5182 return -EIO;
5183 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5184 return -EIO;
5185 *value = (t - 2732) * 100;
5186 return 0;
5187 }
5188 break;
5189
5190 case TPACPI_THERMAL_ACPI_TMP07:
5191 if (idx <= 7) {
5192 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5193 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5194 return -EIO;
5195 if (t > 127 || t < -127)
5196 t = TP_EC_THERMAL_TMP_NA;
5197 *value = t * 1000;
5198 return 0;
5199 }
5200 break;
5201
5202 case TPACPI_THERMAL_NONE:
5203 default:
5204 return -ENOSYS;
5205 }
5206
5207 return -EINVAL;
5208 }
5209
5210 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5211 {
5212 int res, i;
5213 int n;
5214
5215 n = 8;
5216 i = 0;
5217
5218 if (!s)
5219 return -EINVAL;
5220
5221 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5222 n = 16;
5223
5224 for (i = 0 ; i < n; i++) {
5225 res = thermal_get_sensor(i, &s->temp[i]);
5226 if (res)
5227 return res;
5228 }
5229
5230 return n;
5231 }
5232
5233 /* sysfs temp##_input -------------------------------------------------- */
5234
5235 static ssize_t thermal_temp_input_show(struct device *dev,
5236 struct device_attribute *attr,
5237 char *buf)
5238 {
5239 struct sensor_device_attribute *sensor_attr =
5240 to_sensor_dev_attr(attr);
5241 int idx = sensor_attr->index;
5242 s32 value;
5243 int res;
5244
5245 res = thermal_get_sensor(idx, &value);
5246 if (res)
5247 return res;
5248 if (value == TP_EC_THERMAL_TMP_NA * 1000)
5249 return -ENXIO;
5250
5251 return snprintf(buf, PAGE_SIZE, "%d\n", value);
5252 }
5253
5254 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5255 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5256 thermal_temp_input_show, NULL, _idxB)
5257
5258 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5259 THERMAL_SENSOR_ATTR_TEMP(1, 0),
5260 THERMAL_SENSOR_ATTR_TEMP(2, 1),
5261 THERMAL_SENSOR_ATTR_TEMP(3, 2),
5262 THERMAL_SENSOR_ATTR_TEMP(4, 3),
5263 THERMAL_SENSOR_ATTR_TEMP(5, 4),
5264 THERMAL_SENSOR_ATTR_TEMP(6, 5),
5265 THERMAL_SENSOR_ATTR_TEMP(7, 6),
5266 THERMAL_SENSOR_ATTR_TEMP(8, 7),
5267 THERMAL_SENSOR_ATTR_TEMP(9, 8),
5268 THERMAL_SENSOR_ATTR_TEMP(10, 9),
5269 THERMAL_SENSOR_ATTR_TEMP(11, 10),
5270 THERMAL_SENSOR_ATTR_TEMP(12, 11),
5271 THERMAL_SENSOR_ATTR_TEMP(13, 12),
5272 THERMAL_SENSOR_ATTR_TEMP(14, 13),
5273 THERMAL_SENSOR_ATTR_TEMP(15, 14),
5274 THERMAL_SENSOR_ATTR_TEMP(16, 15),
5275 };
5276
5277 #define THERMAL_ATTRS(X) \
5278 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5279
5280 static struct attribute *thermal_temp_input_attr[] = {
5281 THERMAL_ATTRS(8),
5282 THERMAL_ATTRS(9),
5283 THERMAL_ATTRS(10),
5284 THERMAL_ATTRS(11),
5285 THERMAL_ATTRS(12),
5286 THERMAL_ATTRS(13),
5287 THERMAL_ATTRS(14),
5288 THERMAL_ATTRS(15),
5289 THERMAL_ATTRS(0),
5290 THERMAL_ATTRS(1),
5291 THERMAL_ATTRS(2),
5292 THERMAL_ATTRS(3),
5293 THERMAL_ATTRS(4),
5294 THERMAL_ATTRS(5),
5295 THERMAL_ATTRS(6),
5296 THERMAL_ATTRS(7),
5297 NULL
5298 };
5299
5300 static const struct attribute_group thermal_temp_input16_group = {
5301 .attrs = thermal_temp_input_attr
5302 };
5303
5304 static const struct attribute_group thermal_temp_input8_group = {
5305 .attrs = &thermal_temp_input_attr[8]
5306 };
5307
5308 #undef THERMAL_SENSOR_ATTR_TEMP
5309 #undef THERMAL_ATTRS
5310
5311 /* --------------------------------------------------------------------- */
5312
5313 static int __init thermal_init(struct ibm_init_struct *iibm)
5314 {
5315 u8 t, ta1, ta2;
5316 int i;
5317 int acpi_tmp7;
5318 int res;
5319
5320 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5321
5322 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5323
5324 if (thinkpad_id.ec_model) {
5325 /*
5326 * Direct EC access mode: sensors at registers
5327 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
5328 * non-implemented, thermal sensors return 0x80 when
5329 * not available
5330 */
5331
5332 ta1 = ta2 = 0;
5333 for (i = 0; i < 8; i++) {
5334 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5335 ta1 |= t;
5336 } else {
5337 ta1 = 0;
5338 break;
5339 }
5340 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5341 ta2 |= t;
5342 } else {
5343 ta1 = 0;
5344 break;
5345 }
5346 }
5347 if (ta1 == 0) {
5348 /* This is sheer paranoia, but we handle it anyway */
5349 if (acpi_tmp7) {
5350 printk(TPACPI_ERR
5351 "ThinkPad ACPI EC access misbehaving, "
5352 "falling back to ACPI TMPx access "
5353 "mode\n");
5354 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5355 } else {
5356 printk(TPACPI_ERR
5357 "ThinkPad ACPI EC access misbehaving, "
5358 "disabling thermal sensors access\n");
5359 thermal_read_mode = TPACPI_THERMAL_NONE;
5360 }
5361 } else {
5362 thermal_read_mode =
5363 (ta2 != 0) ?
5364 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5365 }
5366 } else if (acpi_tmp7) {
5367 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5368 /* 600e/x, 770e, 770x */
5369 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5370 } else {
5371 /* Standard ACPI TMPx access, max 8 sensors */
5372 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5373 }
5374 } else {
5375 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5376 thermal_read_mode = TPACPI_THERMAL_NONE;
5377 }
5378
5379 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5380 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5381 thermal_read_mode);
5382
5383 switch (thermal_read_mode) {
5384 case TPACPI_THERMAL_TPEC_16:
5385 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5386 &thermal_temp_input16_group);
5387 if (res)
5388 return res;
5389 break;
5390 case TPACPI_THERMAL_TPEC_8:
5391 case TPACPI_THERMAL_ACPI_TMP07:
5392 case TPACPI_THERMAL_ACPI_UPDT:
5393 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5394 &thermal_temp_input8_group);
5395 if (res)
5396 return res;
5397 break;
5398 case TPACPI_THERMAL_NONE:
5399 default:
5400 return 1;
5401 }
5402
5403 return 0;
5404 }
5405
5406 static void thermal_exit(void)
5407 {
5408 switch (thermal_read_mode) {
5409 case TPACPI_THERMAL_TPEC_16:
5410 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5411 &thermal_temp_input16_group);
5412 break;
5413 case TPACPI_THERMAL_TPEC_8:
5414 case TPACPI_THERMAL_ACPI_TMP07:
5415 case TPACPI_THERMAL_ACPI_UPDT:
5416 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5417 &thermal_temp_input16_group);
5418 break;
5419 case TPACPI_THERMAL_NONE:
5420 default:
5421 break;
5422 }
5423 }
5424
5425 static int thermal_read(char *p)
5426 {
5427 int len = 0;
5428 int n, i;
5429 struct ibm_thermal_sensors_struct t;
5430
5431 n = thermal_get_sensors(&t);
5432 if (unlikely(n < 0))
5433 return n;
5434
5435 len += sprintf(p + len, "temperatures:\t");
5436
5437 if (n > 0) {
5438 for (i = 0; i < (n - 1); i++)
5439 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5440 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5441 } else
5442 len += sprintf(p + len, "not supported\n");
5443
5444 return len;
5445 }
5446
5447 static struct ibm_struct thermal_driver_data = {
5448 .name = "thermal",
5449 .read = thermal_read,
5450 .exit = thermal_exit,
5451 };
5452
5453 /*************************************************************************
5454 * EC Dump subdriver
5455 */
5456
5457 static u8 ecdump_regs[256];
5458
5459 static int ecdump_read(char *p)
5460 {
5461 int len = 0;
5462 int i, j;
5463 u8 v;
5464
5465 len += sprintf(p + len, "EC "
5466 " +00 +01 +02 +03 +04 +05 +06 +07"
5467 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5468 for (i = 0; i < 256; i += 16) {
5469 len += sprintf(p + len, "EC 0x%02x:", i);
5470 for (j = 0; j < 16; j++) {
5471 if (!acpi_ec_read(i + j, &v))
5472 break;
5473 if (v != ecdump_regs[i + j])
5474 len += sprintf(p + len, " *%02x", v);
5475 else
5476 len += sprintf(p + len, " %02x", v);
5477 ecdump_regs[i + j] = v;
5478 }
5479 len += sprintf(p + len, "\n");
5480 if (j != 16)
5481 break;
5482 }
5483
5484 /* These are way too dangerous to advertise openly... */
5485 #if 0
5486 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5487 " (<offset> is 00-ff, <value> is 00-ff)\n");
5488 len += sprintf(p + len, "commands:\t0x<offset> <value> "
5489 " (<offset> is 00-ff, <value> is 0-255)\n");
5490 #endif
5491 return len;
5492 }
5493
5494 static int ecdump_write(char *buf)
5495 {
5496 char *cmd;
5497 int i, v;
5498
5499 while ((cmd = next_cmd(&buf))) {
5500 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5501 /* i and v set */
5502 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5503 /* i and v set */
5504 } else
5505 return -EINVAL;
5506 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5507 if (!acpi_ec_write(i, v))
5508 return -EIO;
5509 } else
5510 return -EINVAL;
5511 }
5512
5513 return 0;
5514 }
5515
5516 static struct ibm_struct ecdump_driver_data = {
5517 .name = "ecdump",
5518 .read = ecdump_read,
5519 .write = ecdump_write,
5520 .flags.experimental = 1,
5521 };
5522
5523 /*************************************************************************
5524 * Backlight/brightness subdriver
5525 */
5526
5527 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5528
5529 /*
5530 * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5531 * CMOS NVRAM byte 0x5E, bits 0-3.
5532 *
5533 * EC HBRV (0x31) has the following layout
5534 * Bit 7: unknown function
5535 * Bit 6: unknown function
5536 * Bit 5: Z: honour scale changes, NZ: ignore scale changes
5537 * Bit 4: must be set to zero to avoid problems
5538 * Bit 3-0: backlight brightness level
5539 *
5540 * brightness_get_raw returns status data in the HBRV layout
5541 */
5542
5543 enum {
5544 TP_EC_BACKLIGHT = 0x31,
5545
5546 /* TP_EC_BACKLIGHT bitmasks */
5547 TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5548 TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5549 TP_EC_BACKLIGHT_MAPSW = 0x20,
5550 };
5551
5552 enum tpacpi_brightness_access_mode {
5553 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
5554 TPACPI_BRGHT_MODE_EC, /* EC control */
5555 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
5556 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
5557 TPACPI_BRGHT_MODE_MAX
5558 };
5559
5560 static struct backlight_device *ibm_backlight_device;
5561
5562 static enum tpacpi_brightness_access_mode brightness_mode =
5563 TPACPI_BRGHT_MODE_MAX;
5564
5565 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5566
5567 static struct mutex brightness_mutex;
5568
5569 /* NVRAM brightness access,
5570 * call with brightness_mutex held! */
5571 static unsigned int tpacpi_brightness_nvram_get(void)
5572 {
5573 u8 lnvram;
5574
5575 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5576 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5577 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5578 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5579
5580 return lnvram;
5581 }
5582
5583 static void tpacpi_brightness_checkpoint_nvram(void)
5584 {
5585 u8 lec = 0;
5586 u8 b_nvram;
5587
5588 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5589 return;
5590
5591 vdbg_printk(TPACPI_DBG_BRGHT,
5592 "trying to checkpoint backlight level to NVRAM...\n");
5593
5594 if (mutex_lock_killable(&brightness_mutex) < 0)
5595 return;
5596
5597 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5598 goto unlock;
5599 lec &= TP_EC_BACKLIGHT_LVLMSK;
5600 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5601
5602 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5603 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5604 /* NVRAM needs update */
5605 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5606 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5607 b_nvram |= lec;
5608 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5609 dbg_printk(TPACPI_DBG_BRGHT,
5610 "updated NVRAM backlight level to %u (0x%02x)\n",
5611 (unsigned int) lec, (unsigned int) b_nvram);
5612 } else
5613 vdbg_printk(TPACPI_DBG_BRGHT,
5614 "NVRAM backlight level already is %u (0x%02x)\n",
5615 (unsigned int) lec, (unsigned int) b_nvram);
5616
5617 unlock:
5618 mutex_unlock(&brightness_mutex);
5619 }
5620
5621
5622 /* call with brightness_mutex held! */
5623 static int tpacpi_brightness_get_raw(int *status)
5624 {
5625 u8 lec = 0;
5626
5627 switch (brightness_mode) {
5628 case TPACPI_BRGHT_MODE_UCMS_STEP:
5629 *status = tpacpi_brightness_nvram_get();
5630 return 0;
5631 case TPACPI_BRGHT_MODE_EC:
5632 case TPACPI_BRGHT_MODE_ECNVRAM:
5633 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5634 return -EIO;
5635 *status = lec;
5636 return 0;
5637 default:
5638 return -ENXIO;
5639 }
5640 }
5641
5642 /* call with brightness_mutex held! */
5643 /* do NOT call with illegal backlight level value */
5644 static int tpacpi_brightness_set_ec(unsigned int value)
5645 {
5646 u8 lec = 0;
5647
5648 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5649 return -EIO;
5650
5651 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5652 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5653 (value & TP_EC_BACKLIGHT_LVLMSK))))
5654 return -EIO;
5655
5656 return 0;
5657 }
5658
5659 /* call with brightness_mutex held! */
5660 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5661 {
5662 int cmos_cmd, inc;
5663 unsigned int current_value, i;
5664
5665 current_value = tpacpi_brightness_nvram_get();
5666
5667 if (value == current_value)
5668 return 0;
5669
5670 cmos_cmd = (value > current_value) ?
5671 TP_CMOS_BRIGHTNESS_UP :
5672 TP_CMOS_BRIGHTNESS_DOWN;
5673 inc = (value > current_value) ? 1 : -1;
5674
5675 for (i = current_value; i != value; i += inc)
5676 if (issue_thinkpad_cmos_command(cmos_cmd))
5677 return -EIO;
5678
5679 return 0;
5680 }
5681
5682 /* May return EINTR which can always be mapped to ERESTARTSYS */
5683 static int brightness_set(unsigned int value)
5684 {
5685 int res;
5686
5687 if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5688 value < 0)
5689 return -EINVAL;
5690
5691 vdbg_printk(TPACPI_DBG_BRGHT,
5692 "set backlight level to %d\n", value);
5693
5694 res = mutex_lock_killable(&brightness_mutex);
5695 if (res < 0)
5696 return res;
5697
5698 switch (brightness_mode) {
5699 case TPACPI_BRGHT_MODE_EC:
5700 case TPACPI_BRGHT_MODE_ECNVRAM:
5701 res = tpacpi_brightness_set_ec(value);
5702 break;
5703 case TPACPI_BRGHT_MODE_UCMS_STEP:
5704 res = tpacpi_brightness_set_ucmsstep(value);
5705 break;
5706 default:
5707 res = -ENXIO;
5708 }
5709
5710 mutex_unlock(&brightness_mutex);
5711 return res;
5712 }
5713
5714 /* sysfs backlight class ----------------------------------------------- */
5715
5716 static int brightness_update_status(struct backlight_device *bd)
5717 {
5718 unsigned int level =
5719 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5720 bd->props.power == FB_BLANK_UNBLANK) ?
5721 bd->props.brightness : 0;
5722
5723 dbg_printk(TPACPI_DBG_BRGHT,
5724 "backlight: attempt to set level to %d\n",
5725 level);
5726
5727 /* it is the backlight class's job (caller) to handle
5728 * EINTR and other errors properly */
5729 return brightness_set(level);
5730 }
5731
5732 static int brightness_get(struct backlight_device *bd)
5733 {
5734 int status, res;
5735
5736 res = mutex_lock_killable(&brightness_mutex);
5737 if (res < 0)
5738 return 0;
5739
5740 res = tpacpi_brightness_get_raw(&status);
5741
5742 mutex_unlock(&brightness_mutex);
5743
5744 if (res < 0)
5745 return 0;
5746
5747 return status & TP_EC_BACKLIGHT_LVLMSK;
5748 }
5749
5750 static struct backlight_ops ibm_backlight_data = {
5751 .get_brightness = brightness_get,
5752 .update_status = brightness_update_status,
5753 };
5754
5755 /* --------------------------------------------------------------------- */
5756
5757 static int __init brightness_init(struct ibm_init_struct *iibm)
5758 {
5759 int b;
5760
5761 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5762
5763 mutex_init(&brightness_mutex);
5764
5765 /*
5766 * We always attempt to detect acpi support, so as to switch
5767 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5768 * going to publish a backlight interface
5769 */
5770 b = tpacpi_check_std_acpi_brightness_support();
5771 if (b > 0) {
5772 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
5773 printk(TPACPI_NOTICE
5774 "Lenovo BIOS switched to ACPI backlight "
5775 "control mode\n");
5776 }
5777 if (brightness_enable > 1) {
5778 printk(TPACPI_NOTICE
5779 "standard ACPI backlight interface "
5780 "available, not loading native one...\n");
5781 return 1;
5782 }
5783 }
5784
5785 if (!brightness_enable) {
5786 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5787 "brightness support disabled by "
5788 "module parameter\n");
5789 return 1;
5790 }
5791
5792 if (b > 16) {
5793 printk(TPACPI_ERR
5794 "Unsupported brightness interface, "
5795 "please contact %s\n", TPACPI_MAIL);
5796 return 1;
5797 }
5798 if (b == 16)
5799 tp_features.bright_16levels = 1;
5800
5801 /*
5802 * Check for module parameter bogosity, note that we
5803 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5804 * able to detect "unspecified"
5805 */
5806 if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5807 return -EINVAL;
5808
5809 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5810 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5811 brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5812 if (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) {
5813 /*
5814 * IBM models that define HBRV probably have
5815 * EC-based backlight level control
5816 */
5817 if (acpi_evalf(ec_handle, NULL, "HBRV", "qd"))
5818 /* T40-T43, R50-R52, R50e, R51e, X31-X41 */
5819 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5820 else
5821 /* all other IBM ThinkPads */
5822 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5823 } else
5824 /* All Lenovo ThinkPads */
5825 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5826
5827 dbg_printk(TPACPI_DBG_BRGHT,
5828 "selected brightness_mode=%d\n",
5829 brightness_mode);
5830 }
5831
5832 if (tpacpi_brightness_get_raw(&b) < 0)
5833 return 1;
5834
5835 if (tp_features.bright_16levels)
5836 printk(TPACPI_INFO
5837 "detected a 16-level brightness capable ThinkPad\n");
5838
5839 ibm_backlight_device = backlight_device_register(
5840 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5841 &ibm_backlight_data);
5842 if (IS_ERR(ibm_backlight_device)) {
5843 printk(TPACPI_ERR "Could not register backlight device\n");
5844 return PTR_ERR(ibm_backlight_device);
5845 }
5846 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5847 "brightness is supported\n");
5848
5849 ibm_backlight_device->props.max_brightness =
5850 (tp_features.bright_16levels)? 15 : 7;
5851 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5852 backlight_update_status(ibm_backlight_device);
5853
5854 return 0;
5855 }
5856
5857 static void brightness_suspend(pm_message_t state)
5858 {
5859 tpacpi_brightness_checkpoint_nvram();
5860 }
5861
5862 static void brightness_shutdown(void)
5863 {
5864 tpacpi_brightness_checkpoint_nvram();
5865 }
5866
5867 static void brightness_exit(void)
5868 {
5869 if (ibm_backlight_device) {
5870 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
5871 "calling backlight_device_unregister()\n");
5872 backlight_device_unregister(ibm_backlight_device);
5873 }
5874
5875 tpacpi_brightness_checkpoint_nvram();
5876 }
5877
5878 static int brightness_read(char *p)
5879 {
5880 int len = 0;
5881 int level;
5882
5883 level = brightness_get(NULL);
5884 if (level < 0) {
5885 len += sprintf(p + len, "level:\t\tunreadable\n");
5886 } else {
5887 len += sprintf(p + len, "level:\t\t%d\n", level);
5888 len += sprintf(p + len, "commands:\tup, down\n");
5889 len += sprintf(p + len, "commands:\tlevel <level>"
5890 " (<level> is 0-%d)\n",
5891 (tp_features.bright_16levels) ? 15 : 7);
5892 }
5893
5894 return len;
5895 }
5896
5897 static int brightness_write(char *buf)
5898 {
5899 int level;
5900 int rc;
5901 char *cmd;
5902 int max_level = (tp_features.bright_16levels) ? 15 : 7;
5903
5904 level = brightness_get(NULL);
5905 if (level < 0)
5906 return level;
5907
5908 while ((cmd = next_cmd(&buf))) {
5909 if (strlencmp(cmd, "up") == 0) {
5910 if (level < max_level)
5911 level++;
5912 } else if (strlencmp(cmd, "down") == 0) {
5913 if (level > 0)
5914 level--;
5915 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5916 level >= 0 && level <= max_level) {
5917 /* new level set */
5918 } else
5919 return -EINVAL;
5920 }
5921
5922 tpacpi_disclose_usertask("procfs brightness",
5923 "set level to %d\n", level);
5924
5925 /*
5926 * Now we know what the final level should be, so we try to set it.
5927 * Doing it this way makes the syscall restartable in case of EINTR
5928 */
5929 rc = brightness_set(level);
5930 return (rc == -EINTR)? ERESTARTSYS : rc;
5931 }
5932
5933 static struct ibm_struct brightness_driver_data = {
5934 .name = "brightness",
5935 .read = brightness_read,
5936 .write = brightness_write,
5937 .exit = brightness_exit,
5938 .suspend = brightness_suspend,
5939 .shutdown = brightness_shutdown,
5940 };
5941
5942 /*************************************************************************
5943 * Volume subdriver
5944 */
5945
5946 static int volume_offset = 0x30;
5947
5948 static int volume_read(char *p)
5949 {
5950 int len = 0;
5951 u8 level;
5952
5953 if (!acpi_ec_read(volume_offset, &level)) {
5954 len += sprintf(p + len, "level:\t\tunreadable\n");
5955 } else {
5956 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5957 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5958 len += sprintf(p + len, "commands:\tup, down, mute\n");
5959 len += sprintf(p + len, "commands:\tlevel <level>"
5960 " (<level> is 0-15)\n");
5961 }
5962
5963 return len;
5964 }
5965
5966 static int volume_write(char *buf)
5967 {
5968 int cmos_cmd, inc, i;
5969 u8 level, mute;
5970 int new_level, new_mute;
5971 char *cmd;
5972
5973 while ((cmd = next_cmd(&buf))) {
5974 if (!acpi_ec_read(volume_offset, &level))
5975 return -EIO;
5976 new_mute = mute = level & 0x40;
5977 new_level = level = level & 0xf;
5978
5979 if (strlencmp(cmd, "up") == 0) {
5980 if (mute)
5981 new_mute = 0;
5982 else
5983 new_level = level == 15 ? 15 : level + 1;
5984 } else if (strlencmp(cmd, "down") == 0) {
5985 if (mute)
5986 new_mute = 0;
5987 else
5988 new_level = level == 0 ? 0 : level - 1;
5989 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5990 new_level >= 0 && new_level <= 15) {
5991 /* new_level set */
5992 } else if (strlencmp(cmd, "mute") == 0) {
5993 new_mute = 0x40;
5994 } else
5995 return -EINVAL;
5996
5997 if (new_level != level) {
5998 /* mute doesn't change */
5999
6000 cmos_cmd = (new_level > level) ?
6001 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6002 inc = new_level > level ? 1 : -1;
6003
6004 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6005 !acpi_ec_write(volume_offset, level)))
6006 return -EIO;
6007
6008 for (i = level; i != new_level; i += inc)
6009 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6010 !acpi_ec_write(volume_offset, i + inc))
6011 return -EIO;
6012
6013 if (mute &&
6014 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6015 !acpi_ec_write(volume_offset, new_level + mute))) {
6016 return -EIO;
6017 }
6018 }
6019
6020 if (new_mute != mute) {
6021 /* level doesn't change */
6022
6023 cmos_cmd = (new_mute) ?
6024 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6025
6026 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6027 !acpi_ec_write(volume_offset, level + new_mute))
6028 return -EIO;
6029 }
6030 }
6031
6032 return 0;
6033 }
6034
6035 static struct ibm_struct volume_driver_data = {
6036 .name = "volume",
6037 .read = volume_read,
6038 .write = volume_write,
6039 };
6040
6041 /*************************************************************************
6042 * Fan subdriver
6043 */
6044
6045 /*
6046 * FAN ACCESS MODES
6047 *
6048 * TPACPI_FAN_RD_ACPI_GFAN:
6049 * ACPI GFAN method: returns fan level
6050 *
6051 * see TPACPI_FAN_WR_ACPI_SFAN
6052 * EC 0x2f (HFSP) not available if GFAN exists
6053 *
6054 * TPACPI_FAN_WR_ACPI_SFAN:
6055 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6056 *
6057 * EC 0x2f (HFSP) might be available *for reading*, but do not use
6058 * it for writing.
6059 *
6060 * TPACPI_FAN_WR_TPEC:
6061 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
6062 * Supported on almost all ThinkPads
6063 *
6064 * Fan speed changes of any sort (including those caused by the
6065 * disengaged mode) are usually done slowly by the firmware as the
6066 * maximum ammount of fan duty cycle change per second seems to be
6067 * limited.
6068 *
6069 * Reading is not available if GFAN exists.
6070 * Writing is not available if SFAN exists.
6071 *
6072 * Bits
6073 * 7 automatic mode engaged;
6074 * (default operation mode of the ThinkPad)
6075 * fan level is ignored in this mode.
6076 * 6 full speed mode (takes precedence over bit 7);
6077 * not available on all thinkpads. May disable
6078 * the tachometer while the fan controller ramps up
6079 * the speed (which can take up to a few *minutes*).
6080 * Speeds up fan to 100% duty-cycle, which is far above
6081 * the standard RPM levels. It is not impossible that
6082 * it could cause hardware damage.
6083 * 5-3 unused in some models. Extra bits for fan level
6084 * in others, but still useless as all values above
6085 * 7 map to the same speed as level 7 in these models.
6086 * 2-0 fan level (0..7 usually)
6087 * 0x00 = stop
6088 * 0x07 = max (set when temperatures critical)
6089 * Some ThinkPads may have other levels, see
6090 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6091 *
6092 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6093 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6094 * does so, its initial value is meaningless (0x07).
6095 *
6096 * For firmware bugs, refer to:
6097 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6098 *
6099 * ----
6100 *
6101 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6102 * Main fan tachometer reading (in RPM)
6103 *
6104 * This register is present on all ThinkPads with a new-style EC, and
6105 * it is known not to be present on the A21m/e, and T22, as there is
6106 * something else in offset 0x84 according to the ACPI DSDT. Other
6107 * ThinkPads from this same time period (and earlier) probably lack the
6108 * tachometer as well.
6109 *
6110 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
6111 * was never fixed by IBM to report the EC firmware version string
6112 * probably support the tachometer (like the early X models), so
6113 * detecting it is quite hard. We need more data to know for sure.
6114 *
6115 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6116 * might result.
6117 *
6118 * FIRMWARE BUG: may go stale while the EC is switching to full speed
6119 * mode.
6120 *
6121 * For firmware bugs, refer to:
6122 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6123 *
6124 * TPACPI_FAN_WR_ACPI_FANS:
6125 * ThinkPad X31, X40, X41. Not available in the X60.
6126 *
6127 * FANS ACPI handle: takes three arguments: low speed, medium speed,
6128 * high speed. ACPI DSDT seems to map these three speeds to levels
6129 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6130 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6131 *
6132 * The speeds are stored on handles
6133 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6134 *
6135 * There are three default speed sets, acessible as handles:
6136 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6137 *
6138 * ACPI DSDT switches which set is in use depending on various
6139 * factors.
6140 *
6141 * TPACPI_FAN_WR_TPEC is also available and should be used to
6142 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
6143 * but the ACPI tables just mention level 7.
6144 */
6145
6146 enum { /* Fan control constants */
6147 fan_status_offset = 0x2f, /* EC register 0x2f */
6148 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
6149 * 0x84 must be read before 0x85 */
6150
6151 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
6152 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
6153
6154 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
6155 };
6156
6157 enum fan_status_access_mode {
6158 TPACPI_FAN_NONE = 0, /* No fan status or control */
6159 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
6160 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6161 };
6162
6163 enum fan_control_access_mode {
6164 TPACPI_FAN_WR_NONE = 0, /* No fan control */
6165 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
6166 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
6167 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
6168 };
6169
6170 enum fan_control_commands {
6171 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
6172 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
6173 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
6174 * and also watchdog cmd */
6175 };
6176
6177 static int fan_control_allowed;
6178
6179 static enum fan_status_access_mode fan_status_access_mode;
6180 static enum fan_control_access_mode fan_control_access_mode;
6181 static enum fan_control_commands fan_control_commands;
6182
6183 static u8 fan_control_initial_status;
6184 static u8 fan_control_desired_level;
6185 static u8 fan_control_resume_level;
6186 static int fan_watchdog_maxinterval;
6187
6188 static struct mutex fan_mutex;
6189
6190 static void fan_watchdog_fire(struct work_struct *ignored);
6191 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6192
6193 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
6194 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6195 "\\FSPD", /* 600e/x, 770e, 770x */
6196 ); /* all others */
6197 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6198 "JFNS", /* 770x-JL */
6199 ); /* all others */
6200
6201 /*
6202 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6203 * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6204 * be in auto mode (0x80).
6205 *
6206 * This is corrected by any write to HFSP either by the driver, or
6207 * by the firmware.
6208 *
6209 * We assume 0x07 really means auto mode while this quirk is active,
6210 * as this is far more likely than the ThinkPad being in level 7,
6211 * which is only used by the firmware during thermal emergencies.
6212 */
6213
6214 static void fan_quirk1_detect(void)
6215 {
6216 /* In some ThinkPads, neither the EC nor the ACPI
6217 * DSDT initialize the HFSP register, and it ends up
6218 * being initially set to 0x07 when it *could* be
6219 * either 0x07 or 0x80.
6220 *
6221 * Enable for TP-1Y (T43), TP-78 (R51e),
6222 * TP-76 (R52), TP-70 (T43, R52), which are known
6223 * to be buggy. */
6224 if (fan_control_initial_status == 0x07) {
6225 switch (thinkpad_id.ec_model) {
6226 case 0x5931: /* TP-1Y */
6227 case 0x3837: /* TP-78 */
6228 case 0x3637: /* TP-76 */
6229 case 0x3037: /* TP-70 */
6230 printk(TPACPI_NOTICE
6231 "fan_init: initial fan status is unknown, "
6232 "assuming it is in auto mode\n");
6233 tp_features.fan_ctrl_status_undef = 1;
6234 ;;
6235 }
6236 }
6237 }
6238
6239 static void fan_quirk1_handle(u8 *fan_status)
6240 {
6241 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6242 if (*fan_status != fan_control_initial_status) {
6243 /* something changed the HFSP regisnter since
6244 * driver init time, so it is not undefined
6245 * anymore */
6246 tp_features.fan_ctrl_status_undef = 0;
6247 } else {
6248 /* Return most likely status. In fact, it
6249 * might be the only possible status */
6250 *fan_status = TP_EC_FAN_AUTO;
6251 }
6252 }
6253 }
6254
6255 /*
6256 * Call with fan_mutex held
6257 */
6258 static void fan_update_desired_level(u8 status)
6259 {
6260 if ((status &
6261 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6262 if (status > 7)
6263 fan_control_desired_level = 7;
6264 else
6265 fan_control_desired_level = status;
6266 }
6267 }
6268
6269 static int fan_get_status(u8 *status)
6270 {
6271 u8 s;
6272
6273 /* TODO:
6274 * Add TPACPI_FAN_RD_ACPI_FANS ? */
6275
6276 switch (fan_status_access_mode) {
6277 case TPACPI_FAN_RD_ACPI_GFAN:
6278 /* 570, 600e/x, 770e, 770x */
6279
6280 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6281 return -EIO;
6282
6283 if (likely(status))
6284 *status = s & 0x07;
6285
6286 break;
6287
6288 case TPACPI_FAN_RD_TPEC:
6289 /* all except 570, 600e/x, 770e, 770x */
6290 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6291 return -EIO;
6292
6293 if (likely(status)) {
6294 *status = s;
6295 fan_quirk1_handle(status);
6296 }
6297
6298 break;
6299
6300 default:
6301 return -ENXIO;
6302 }
6303
6304 return 0;
6305 }
6306
6307 static int fan_get_status_safe(u8 *status)
6308 {
6309 int rc;
6310 u8 s;
6311
6312 if (mutex_lock_killable(&fan_mutex))
6313 return -ERESTARTSYS;
6314 rc = fan_get_status(&s);
6315 if (!rc)
6316 fan_update_desired_level(s);
6317 mutex_unlock(&fan_mutex);
6318
6319 if (status)
6320 *status = s;
6321
6322 return rc;
6323 }
6324
6325 static int fan_get_speed(unsigned int *speed)
6326 {
6327 u8 hi, lo;
6328
6329 switch (fan_status_access_mode) {
6330 case TPACPI_FAN_RD_TPEC:
6331 /* all except 570, 600e/x, 770e, 770x */
6332 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6333 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6334 return -EIO;
6335
6336 if (likely(speed))
6337 *speed = (hi << 8) | lo;
6338
6339 break;
6340
6341 default:
6342 return -ENXIO;
6343 }
6344
6345 return 0;
6346 }
6347
6348 static int fan_set_level(int level)
6349 {
6350 if (!fan_control_allowed)
6351 return -EPERM;
6352
6353 switch (fan_control_access_mode) {
6354 case TPACPI_FAN_WR_ACPI_SFAN:
6355 if (level >= 0 && level <= 7) {
6356 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6357 return -EIO;
6358 } else
6359 return -EINVAL;
6360 break;
6361
6362 case TPACPI_FAN_WR_ACPI_FANS:
6363 case TPACPI_FAN_WR_TPEC:
6364 if (!(level & TP_EC_FAN_AUTO) &&
6365 !(level & TP_EC_FAN_FULLSPEED) &&
6366 ((level < 0) || (level > 7)))
6367 return -EINVAL;
6368
6369 /* safety net should the EC not support AUTO
6370 * or FULLSPEED mode bits and just ignore them */
6371 if (level & TP_EC_FAN_FULLSPEED)
6372 level |= 7; /* safety min speed 7 */
6373 else if (level & TP_EC_FAN_AUTO)
6374 level |= 4; /* safety min speed 4 */
6375
6376 if (!acpi_ec_write(fan_status_offset, level))
6377 return -EIO;
6378 else
6379 tp_features.fan_ctrl_status_undef = 0;
6380 break;
6381
6382 default:
6383 return -ENXIO;
6384 }
6385
6386 vdbg_printk(TPACPI_DBG_FAN,
6387 "fan control: set fan control register to 0x%02x\n", level);
6388 return 0;
6389 }
6390
6391 static int fan_set_level_safe(int level)
6392 {
6393 int rc;
6394
6395 if (!fan_control_allowed)
6396 return -EPERM;
6397
6398 if (mutex_lock_killable(&fan_mutex))
6399 return -ERESTARTSYS;
6400
6401 if (level == TPACPI_FAN_LAST_LEVEL)
6402 level = fan_control_desired_level;
6403
6404 rc = fan_set_level(level);
6405 if (!rc)
6406 fan_update_desired_level(level);
6407
6408 mutex_unlock(&fan_mutex);
6409 return rc;
6410 }
6411
6412 static int fan_set_enable(void)
6413 {
6414 u8 s;
6415 int rc;
6416
6417 if (!fan_control_allowed)
6418 return -EPERM;
6419
6420 if (mutex_lock_killable(&fan_mutex))
6421 return -ERESTARTSYS;
6422
6423 switch (fan_control_access_mode) {
6424 case TPACPI_FAN_WR_ACPI_FANS:
6425 case TPACPI_FAN_WR_TPEC:
6426 rc = fan_get_status(&s);
6427 if (rc < 0)
6428 break;
6429
6430 /* Don't go out of emergency fan mode */
6431 if (s != 7) {
6432 s &= 0x07;
6433 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6434 }
6435
6436 if (!acpi_ec_write(fan_status_offset, s))
6437 rc = -EIO;
6438 else {
6439 tp_features.fan_ctrl_status_undef = 0;
6440 rc = 0;
6441 }
6442 break;
6443
6444 case TPACPI_FAN_WR_ACPI_SFAN:
6445 rc = fan_get_status(&s);
6446 if (rc < 0)
6447 break;
6448
6449 s &= 0x07;
6450
6451 /* Set fan to at least level 4 */
6452 s |= 4;
6453
6454 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6455 rc = -EIO;
6456 else
6457 rc = 0;
6458 break;
6459
6460 default:
6461 rc = -ENXIO;
6462 }
6463
6464 mutex_unlock(&fan_mutex);
6465
6466 if (!rc)
6467 vdbg_printk(TPACPI_DBG_FAN,
6468 "fan control: set fan control register to 0x%02x\n",
6469 s);
6470 return rc;
6471 }
6472
6473 static int fan_set_disable(void)
6474 {
6475 int rc;
6476
6477 if (!fan_control_allowed)
6478 return -EPERM;
6479
6480 if (mutex_lock_killable(&fan_mutex))
6481 return -ERESTARTSYS;
6482
6483 rc = 0;
6484 switch (fan_control_access_mode) {
6485 case TPACPI_FAN_WR_ACPI_FANS:
6486 case TPACPI_FAN_WR_TPEC:
6487 if (!acpi_ec_write(fan_status_offset, 0x00))
6488 rc = -EIO;
6489 else {
6490 fan_control_desired_level = 0;
6491 tp_features.fan_ctrl_status_undef = 0;
6492 }
6493 break;
6494
6495 case TPACPI_FAN_WR_ACPI_SFAN:
6496 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6497 rc = -EIO;
6498 else
6499 fan_control_desired_level = 0;
6500 break;
6501
6502 default:
6503 rc = -ENXIO;
6504 }
6505
6506 if (!rc)
6507 vdbg_printk(TPACPI_DBG_FAN,
6508 "fan control: set fan control register to 0\n");
6509
6510 mutex_unlock(&fan_mutex);
6511 return rc;
6512 }
6513
6514 static int fan_set_speed(int speed)
6515 {
6516 int rc;
6517
6518 if (!fan_control_allowed)
6519 return -EPERM;
6520
6521 if (mutex_lock_killable(&fan_mutex))
6522 return -ERESTARTSYS;
6523
6524 rc = 0;
6525 switch (fan_control_access_mode) {
6526 case TPACPI_FAN_WR_ACPI_FANS:
6527 if (speed >= 0 && speed <= 65535) {
6528 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6529 speed, speed, speed))
6530 rc = -EIO;
6531 } else
6532 rc = -EINVAL;
6533 break;
6534
6535 default:
6536 rc = -ENXIO;
6537 }
6538
6539 mutex_unlock(&fan_mutex);
6540 return rc;
6541 }
6542
6543 static void fan_watchdog_reset(void)
6544 {
6545 static int fan_watchdog_active;
6546
6547 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6548 return;
6549
6550 if (fan_watchdog_active)
6551 cancel_delayed_work(&fan_watchdog_task);
6552
6553 if (fan_watchdog_maxinterval > 0 &&
6554 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6555 fan_watchdog_active = 1;
6556 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6557 msecs_to_jiffies(fan_watchdog_maxinterval
6558 * 1000))) {
6559 printk(TPACPI_ERR
6560 "failed to queue the fan watchdog, "
6561 "watchdog will not trigger\n");
6562 }
6563 } else
6564 fan_watchdog_active = 0;
6565 }
6566
6567 static void fan_watchdog_fire(struct work_struct *ignored)
6568 {
6569 int rc;
6570
6571 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6572 return;
6573
6574 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6575 rc = fan_set_enable();
6576 if (rc < 0) {
6577 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6578 "will try again later...\n", -rc);
6579 /* reschedule for later */
6580 fan_watchdog_reset();
6581 }
6582 }
6583
6584 /*
6585 * SYSFS fan layout: hwmon compatible (device)
6586 *
6587 * pwm*_enable:
6588 * 0: "disengaged" mode
6589 * 1: manual mode
6590 * 2: native EC "auto" mode (recommended, hardware default)
6591 *
6592 * pwm*: set speed in manual mode, ignored otherwise.
6593 * 0 is level 0; 255 is level 7. Intermediate points done with linear
6594 * interpolation.
6595 *
6596 * fan*_input: tachometer reading, RPM
6597 *
6598 *
6599 * SYSFS fan layout: extensions
6600 *
6601 * fan_watchdog (driver):
6602 * fan watchdog interval in seconds, 0 disables (default), max 120
6603 */
6604
6605 /* sysfs fan pwm1_enable ----------------------------------------------- */
6606 static ssize_t fan_pwm1_enable_show(struct device *dev,
6607 struct device_attribute *attr,
6608 char *buf)
6609 {
6610 int res, mode;
6611 u8 status;
6612
6613 res = fan_get_status_safe(&status);
6614 if (res)
6615 return res;
6616
6617 if (status & TP_EC_FAN_FULLSPEED) {
6618 mode = 0;
6619 } else if (status & TP_EC_FAN_AUTO) {
6620 mode = 2;
6621 } else
6622 mode = 1;
6623
6624 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6625 }
6626
6627 static ssize_t fan_pwm1_enable_store(struct device *dev,
6628 struct device_attribute *attr,
6629 const char *buf, size_t count)
6630 {
6631 unsigned long t;
6632 int res, level;
6633
6634 if (parse_strtoul(buf, 2, &t))
6635 return -EINVAL;
6636
6637 tpacpi_disclose_usertask("hwmon pwm1_enable",
6638 "set fan mode to %lu\n", t);
6639
6640 switch (t) {
6641 case 0:
6642 level = TP_EC_FAN_FULLSPEED;
6643 break;
6644 case 1:
6645 level = TPACPI_FAN_LAST_LEVEL;
6646 break;
6647 case 2:
6648 level = TP_EC_FAN_AUTO;
6649 break;
6650 case 3:
6651 /* reserved for software-controlled auto mode */
6652 return -ENOSYS;
6653 default:
6654 return -EINVAL;
6655 }
6656
6657 res = fan_set_level_safe(level);
6658 if (res == -ENXIO)
6659 return -EINVAL;
6660 else if (res < 0)
6661 return res;
6662
6663 fan_watchdog_reset();
6664
6665 return count;
6666 }
6667
6668 static struct device_attribute dev_attr_fan_pwm1_enable =
6669 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6670 fan_pwm1_enable_show, fan_pwm1_enable_store);
6671
6672 /* sysfs fan pwm1 ------------------------------------------------------ */
6673 static ssize_t fan_pwm1_show(struct device *dev,
6674 struct device_attribute *attr,
6675 char *buf)
6676 {
6677 int res;
6678 u8 status;
6679
6680 res = fan_get_status_safe(&status);
6681 if (res)
6682 return res;
6683
6684 if ((status &
6685 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6686 status = fan_control_desired_level;
6687
6688 if (status > 7)
6689 status = 7;
6690
6691 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6692 }
6693
6694 static ssize_t fan_pwm1_store(struct device *dev,
6695 struct device_attribute *attr,
6696 const char *buf, size_t count)
6697 {
6698 unsigned long s;
6699 int rc;
6700 u8 status, newlevel;
6701
6702 if (parse_strtoul(buf, 255, &s))
6703 return -EINVAL;
6704
6705 tpacpi_disclose_usertask("hwmon pwm1",
6706 "set fan speed to %lu\n", s);
6707
6708 /* scale down from 0-255 to 0-7 */
6709 newlevel = (s >> 5) & 0x07;
6710
6711 if (mutex_lock_killable(&fan_mutex))
6712 return -ERESTARTSYS;
6713
6714 rc = fan_get_status(&status);
6715 if (!rc && (status &
6716 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6717 rc = fan_set_level(newlevel);
6718 if (rc == -ENXIO)
6719 rc = -EINVAL;
6720 else if (!rc) {
6721 fan_update_desired_level(newlevel);
6722 fan_watchdog_reset();
6723 }
6724 }
6725
6726 mutex_unlock(&fan_mutex);
6727 return (rc)? rc : count;
6728 }
6729
6730 static struct device_attribute dev_attr_fan_pwm1 =
6731 __ATTR(pwm1, S_IWUSR | S_IRUGO,
6732 fan_pwm1_show, fan_pwm1_store);
6733
6734 /* sysfs fan fan1_input ------------------------------------------------ */
6735 static ssize_t fan_fan1_input_show(struct device *dev,
6736 struct device_attribute *attr,
6737 char *buf)
6738 {
6739 int res;
6740 unsigned int speed;
6741
6742 res = fan_get_speed(&speed);
6743 if (res < 0)
6744 return res;
6745
6746 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6747 }
6748
6749 static struct device_attribute dev_attr_fan_fan1_input =
6750 __ATTR(fan1_input, S_IRUGO,
6751 fan_fan1_input_show, NULL);
6752
6753 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6754 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6755 char *buf)
6756 {
6757 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6758 }
6759
6760 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6761 const char *buf, size_t count)
6762 {
6763 unsigned long t;
6764
6765 if (parse_strtoul(buf, 120, &t))
6766 return -EINVAL;
6767
6768 if (!fan_control_allowed)
6769 return -EPERM;
6770
6771 fan_watchdog_maxinterval = t;
6772 fan_watchdog_reset();
6773
6774 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
6775
6776 return count;
6777 }
6778
6779 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6780 fan_fan_watchdog_show, fan_fan_watchdog_store);
6781
6782 /* --------------------------------------------------------------------- */
6783 static struct attribute *fan_attributes[] = {
6784 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6785 &dev_attr_fan_fan1_input.attr,
6786 NULL
6787 };
6788
6789 static const struct attribute_group fan_attr_group = {
6790 .attrs = fan_attributes,
6791 };
6792
6793 static int __init fan_init(struct ibm_init_struct *iibm)
6794 {
6795 int rc;
6796
6797 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6798 "initializing fan subdriver\n");
6799
6800 mutex_init(&fan_mutex);
6801 fan_status_access_mode = TPACPI_FAN_NONE;
6802 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6803 fan_control_commands = 0;
6804 fan_watchdog_maxinterval = 0;
6805 tp_features.fan_ctrl_status_undef = 0;
6806 fan_control_desired_level = 7;
6807
6808 TPACPI_ACPIHANDLE_INIT(fans);
6809 TPACPI_ACPIHANDLE_INIT(gfan);
6810 TPACPI_ACPIHANDLE_INIT(sfan);
6811
6812 if (gfan_handle) {
6813 /* 570, 600e/x, 770e, 770x */
6814 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6815 } else {
6816 /* all other ThinkPads: note that even old-style
6817 * ThinkPad ECs supports the fan control register */
6818 if (likely(acpi_ec_read(fan_status_offset,
6819 &fan_control_initial_status))) {
6820 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6821 fan_quirk1_detect();
6822 } else {
6823 printk(TPACPI_ERR
6824 "ThinkPad ACPI EC access misbehaving, "
6825 "fan status and control unavailable\n");
6826 return 1;
6827 }
6828 }
6829
6830 if (sfan_handle) {
6831 /* 570, 770x-JL */
6832 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6833 fan_control_commands |=
6834 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6835 } else {
6836 if (!gfan_handle) {
6837 /* gfan without sfan means no fan control */
6838 /* all other models implement TP EC 0x2f control */
6839
6840 if (fans_handle) {
6841 /* X31, X40, X41 */
6842 fan_control_access_mode =
6843 TPACPI_FAN_WR_ACPI_FANS;
6844 fan_control_commands |=
6845 TPACPI_FAN_CMD_SPEED |
6846 TPACPI_FAN_CMD_LEVEL |
6847 TPACPI_FAN_CMD_ENABLE;
6848 } else {
6849 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6850 fan_control_commands |=
6851 TPACPI_FAN_CMD_LEVEL |
6852 TPACPI_FAN_CMD_ENABLE;
6853 }
6854 }
6855 }
6856
6857 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6858 "fan is %s, modes %d, %d\n",
6859 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6860 fan_control_access_mode != TPACPI_FAN_WR_NONE),
6861 fan_status_access_mode, fan_control_access_mode);
6862
6863 /* fan control master switch */
6864 if (!fan_control_allowed) {
6865 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6866 fan_control_commands = 0;
6867 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6868 "fan control features disabled by parameter\n");
6869 }
6870
6871 /* update fan_control_desired_level */
6872 if (fan_status_access_mode != TPACPI_FAN_NONE)
6873 fan_get_status_safe(NULL);
6874
6875 if (fan_status_access_mode != TPACPI_FAN_NONE ||
6876 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6877 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6878 &fan_attr_group);
6879 if (rc < 0)
6880 return rc;
6881
6882 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6883 &driver_attr_fan_watchdog);
6884 if (rc < 0) {
6885 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6886 &fan_attr_group);
6887 return rc;
6888 }
6889 return 0;
6890 } else
6891 return 1;
6892 }
6893
6894 static void fan_exit(void)
6895 {
6896 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
6897 "cancelling any pending fan watchdog tasks\n");
6898
6899 /* FIXME: can we really do this unconditionally? */
6900 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6901 driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6902 &driver_attr_fan_watchdog);
6903
6904 cancel_delayed_work(&fan_watchdog_task);
6905 flush_workqueue(tpacpi_wq);
6906 }
6907
6908 static void fan_suspend(pm_message_t state)
6909 {
6910 int rc;
6911
6912 if (!fan_control_allowed)
6913 return;
6914
6915 /* Store fan status in cache */
6916 fan_control_resume_level = 0;
6917 rc = fan_get_status_safe(&fan_control_resume_level);
6918 if (rc < 0)
6919 printk(TPACPI_NOTICE
6920 "failed to read fan level for later "
6921 "restore during resume: %d\n", rc);
6922
6923 /* if it is undefined, don't attempt to restore it.
6924 * KEEP THIS LAST */
6925 if (tp_features.fan_ctrl_status_undef)
6926 fan_control_resume_level = 0;
6927 }
6928
6929 static void fan_resume(void)
6930 {
6931 u8 current_level = 7;
6932 bool do_set = false;
6933 int rc;
6934
6935 /* DSDT *always* updates status on resume */
6936 tp_features.fan_ctrl_status_undef = 0;
6937
6938 if (!fan_control_allowed ||
6939 !fan_control_resume_level ||
6940 (fan_get_status_safe(&current_level) < 0))
6941 return;
6942
6943 switch (fan_control_access_mode) {
6944 case TPACPI_FAN_WR_ACPI_SFAN:
6945 /* never decrease fan level */
6946 do_set = (fan_control_resume_level > current_level);
6947 break;
6948 case TPACPI_FAN_WR_ACPI_FANS:
6949 case TPACPI_FAN_WR_TPEC:
6950 /* never decrease fan level, scale is:
6951 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6952 *
6953 * We expect the firmware to set either 7 or AUTO, but we
6954 * handle FULLSPEED out of paranoia.
6955 *
6956 * So, we can safely only restore FULLSPEED or 7, anything
6957 * else could slow the fan. Restoring AUTO is useless, at
6958 * best that's exactly what the DSDT already set (it is the
6959 * slower it uses).
6960 *
6961 * Always keep in mind that the DSDT *will* have set the
6962 * fans to what the vendor supposes is the best level. We
6963 * muck with it only to speed the fan up.
6964 */
6965 if (fan_control_resume_level != 7 &&
6966 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6967 return;
6968 else
6969 do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6970 (current_level != fan_control_resume_level);
6971 break;
6972 default:
6973 return;
6974 }
6975 if (do_set) {
6976 printk(TPACPI_NOTICE
6977 "restoring fan level to 0x%02x\n",
6978 fan_control_resume_level);
6979 rc = fan_set_level_safe(fan_control_resume_level);
6980 if (rc < 0)
6981 printk(TPACPI_NOTICE
6982 "failed to restore fan level: %d\n", rc);
6983 }
6984 }
6985
6986 static int fan_read(char *p)
6987 {
6988 int len = 0;
6989 int rc;
6990 u8 status;
6991 unsigned int speed = 0;
6992
6993 switch (fan_status_access_mode) {
6994 case TPACPI_FAN_RD_ACPI_GFAN:
6995 /* 570, 600e/x, 770e, 770x */
6996 rc = fan_get_status_safe(&status);
6997 if (rc < 0)
6998 return rc;
6999
7000 len += sprintf(p + len, "status:\t\t%s\n"
7001 "level:\t\t%d\n",
7002 (status != 0) ? "enabled" : "disabled", status);
7003 break;
7004
7005 case TPACPI_FAN_RD_TPEC:
7006 /* all except 570, 600e/x, 770e, 770x */
7007 rc = fan_get_status_safe(&status);
7008 if (rc < 0)
7009 return rc;
7010
7011 len += sprintf(p + len, "status:\t\t%s\n",
7012 (status != 0) ? "enabled" : "disabled");
7013
7014 rc = fan_get_speed(&speed);
7015 if (rc < 0)
7016 return rc;
7017
7018 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7019
7020 if (status & TP_EC_FAN_FULLSPEED)
7021 /* Disengaged mode takes precedence */
7022 len += sprintf(p + len, "level:\t\tdisengaged\n");
7023 else if (status & TP_EC_FAN_AUTO)
7024 len += sprintf(p + len, "level:\t\tauto\n");
7025 else
7026 len += sprintf(p + len, "level:\t\t%d\n", status);
7027 break;
7028
7029 case TPACPI_FAN_NONE:
7030 default:
7031 len += sprintf(p + len, "status:\t\tnot supported\n");
7032 }
7033
7034 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7035 len += sprintf(p + len, "commands:\tlevel <level>");
7036
7037 switch (fan_control_access_mode) {
7038 case TPACPI_FAN_WR_ACPI_SFAN:
7039 len += sprintf(p + len, " (<level> is 0-7)\n");
7040 break;
7041
7042 default:
7043 len += sprintf(p + len, " (<level> is 0-7, "
7044 "auto, disengaged, full-speed)\n");
7045 break;
7046 }
7047 }
7048
7049 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7050 len += sprintf(p + len, "commands:\tenable, disable\n"
7051 "commands:\twatchdog <timeout> (<timeout> "
7052 "is 0 (off), 1-120 (seconds))\n");
7053
7054 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7055 len += sprintf(p + len, "commands:\tspeed <speed>"
7056 " (<speed> is 0-65535)\n");
7057
7058 return len;
7059 }
7060
7061 static int fan_write_cmd_level(const char *cmd, int *rc)
7062 {
7063 int level;
7064
7065 if (strlencmp(cmd, "level auto") == 0)
7066 level = TP_EC_FAN_AUTO;
7067 else if ((strlencmp(cmd, "level disengaged") == 0) |
7068 (strlencmp(cmd, "level full-speed") == 0))
7069 level = TP_EC_FAN_FULLSPEED;
7070 else if (sscanf(cmd, "level %d", &level) != 1)
7071 return 0;
7072
7073 *rc = fan_set_level_safe(level);
7074 if (*rc == -ENXIO)
7075 printk(TPACPI_ERR "level command accepted for unsupported "
7076 "access mode %d", fan_control_access_mode);
7077 else if (!*rc)
7078 tpacpi_disclose_usertask("procfs fan",
7079 "set level to %d\n", level);
7080
7081 return 1;
7082 }
7083
7084 static int fan_write_cmd_enable(const char *cmd, int *rc)
7085 {
7086 if (strlencmp(cmd, "enable") != 0)
7087 return 0;
7088
7089 *rc = fan_set_enable();
7090 if (*rc == -ENXIO)
7091 printk(TPACPI_ERR "enable command accepted for unsupported "
7092 "access mode %d", fan_control_access_mode);
7093 else if (!*rc)
7094 tpacpi_disclose_usertask("procfs fan", "enable\n");
7095
7096 return 1;
7097 }
7098
7099 static int fan_write_cmd_disable(const char *cmd, int *rc)
7100 {
7101 if (strlencmp(cmd, "disable") != 0)
7102 return 0;
7103
7104 *rc = fan_set_disable();
7105 if (*rc == -ENXIO)
7106 printk(TPACPI_ERR "disable command accepted for unsupported "
7107 "access mode %d", fan_control_access_mode);
7108 else if (!*rc)
7109 tpacpi_disclose_usertask("procfs fan", "disable\n");
7110
7111 return 1;
7112 }
7113
7114 static int fan_write_cmd_speed(const char *cmd, int *rc)
7115 {
7116 int speed;
7117
7118 /* TODO:
7119 * Support speed <low> <medium> <high> ? */
7120
7121 if (sscanf(cmd, "speed %d", &speed) != 1)
7122 return 0;
7123
7124 *rc = fan_set_speed(speed);
7125 if (*rc == -ENXIO)
7126 printk(TPACPI_ERR "speed command accepted for unsupported "
7127 "access mode %d", fan_control_access_mode);
7128 else if (!*rc)
7129 tpacpi_disclose_usertask("procfs fan",
7130 "set speed to %d\n", speed);
7131
7132 return 1;
7133 }
7134
7135 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7136 {
7137 int interval;
7138
7139 if (sscanf(cmd, "watchdog %d", &interval) != 1)
7140 return 0;
7141
7142 if (interval < 0 || interval > 120)
7143 *rc = -EINVAL;
7144 else {
7145 fan_watchdog_maxinterval = interval;
7146 tpacpi_disclose_usertask("procfs fan",
7147 "set watchdog timer to %d\n",
7148 interval);
7149 }
7150
7151 return 1;
7152 }
7153
7154 static int fan_write(char *buf)
7155 {
7156 char *cmd;
7157 int rc = 0;
7158
7159 while (!rc && (cmd = next_cmd(&buf))) {
7160 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7161 fan_write_cmd_level(cmd, &rc)) &&
7162 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7163 (fan_write_cmd_enable(cmd, &rc) ||
7164 fan_write_cmd_disable(cmd, &rc) ||
7165 fan_write_cmd_watchdog(cmd, &rc))) &&
7166 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7167 fan_write_cmd_speed(cmd, &rc))
7168 )
7169 rc = -EINVAL;
7170 else if (!rc)
7171 fan_watchdog_reset();
7172 }
7173
7174 return rc;
7175 }
7176
7177 static struct ibm_struct fan_driver_data = {
7178 .name = "fan",
7179 .read = fan_read,
7180 .write = fan_write,
7181 .exit = fan_exit,
7182 .suspend = fan_suspend,
7183 .resume = fan_resume,
7184 };
7185
7186 /****************************************************************************
7187 ****************************************************************************
7188 *
7189 * Infrastructure
7190 *
7191 ****************************************************************************
7192 ****************************************************************************/
7193
7194 /* sysfs name ---------------------------------------------------------- */
7195 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7196 struct device_attribute *attr,
7197 char *buf)
7198 {
7199 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7200 }
7201
7202 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7203 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7204
7205 /* --------------------------------------------------------------------- */
7206
7207 /* /proc support */
7208 static struct proc_dir_entry *proc_dir;
7209
7210 /*
7211 * Module and infrastructure proble, init and exit handling
7212 */
7213
7214 static int force_load;
7215
7216 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7217 static const char * __init str_supported(int is_supported)
7218 {
7219 static char text_unsupported[] __initdata = "not supported";
7220
7221 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7222 }
7223 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7224
7225 static void ibm_exit(struct ibm_struct *ibm)
7226 {
7227 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7228
7229 list_del_init(&ibm->all_drivers);
7230
7231 if (ibm->flags.acpi_notify_installed) {
7232 dbg_printk(TPACPI_DBG_EXIT,
7233 "%s: acpi_remove_notify_handler\n", ibm->name);
7234 BUG_ON(!ibm->acpi);
7235 acpi_remove_notify_handler(*ibm->acpi->handle,
7236 ibm->acpi->type,
7237 dispatch_acpi_notify);
7238 ibm->flags.acpi_notify_installed = 0;
7239 ibm->flags.acpi_notify_installed = 0;
7240 }
7241
7242 if (ibm->flags.proc_created) {
7243 dbg_printk(TPACPI_DBG_EXIT,
7244 "%s: remove_proc_entry\n", ibm->name);
7245 remove_proc_entry(ibm->name, proc_dir);
7246 ibm->flags.proc_created = 0;
7247 }
7248
7249 if (ibm->flags.acpi_driver_registered) {
7250 dbg_printk(TPACPI_DBG_EXIT,
7251 "%s: acpi_bus_unregister_driver\n", ibm->name);
7252 BUG_ON(!ibm->acpi);
7253 acpi_bus_unregister_driver(ibm->acpi->driver);
7254 kfree(ibm->acpi->driver);
7255 ibm->acpi->driver = NULL;
7256 ibm->flags.acpi_driver_registered = 0;
7257 }
7258
7259 if (ibm->flags.init_called && ibm->exit) {
7260 ibm->exit();
7261 ibm->flags.init_called = 0;
7262 }
7263
7264 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7265 }
7266
7267 static int __init ibm_init(struct ibm_init_struct *iibm)
7268 {
7269 int ret;
7270 struct ibm_struct *ibm = iibm->data;
7271 struct proc_dir_entry *entry;
7272
7273 BUG_ON(ibm == NULL);
7274
7275 INIT_LIST_HEAD(&ibm->all_drivers);
7276
7277 if (ibm->flags.experimental && !experimental)
7278 return 0;
7279
7280 dbg_printk(TPACPI_DBG_INIT,
7281 "probing for %s\n", ibm->name);
7282
7283 if (iibm->init) {
7284 ret = iibm->init(iibm);
7285 if (ret > 0)
7286 return 0; /* probe failed */
7287 if (ret)
7288 return ret;
7289
7290 ibm->flags.init_called = 1;
7291 }
7292
7293 if (ibm->acpi) {
7294 if (ibm->acpi->hid) {
7295 ret = register_tpacpi_subdriver(ibm);
7296 if (ret)
7297 goto err_out;
7298 }
7299
7300 if (ibm->acpi->notify) {
7301 ret = setup_acpi_notify(ibm);
7302 if (ret == -ENODEV) {
7303 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7304 ibm->name);
7305 ret = 0;
7306 goto err_out;
7307 }
7308 if (ret < 0)
7309 goto err_out;
7310 }
7311 }
7312
7313 dbg_printk(TPACPI_DBG_INIT,
7314 "%s installed\n", ibm->name);
7315
7316 if (ibm->read) {
7317 entry = create_proc_entry(ibm->name,
7318 S_IFREG | S_IRUGO | S_IWUSR,
7319 proc_dir);
7320 if (!entry) {
7321 printk(TPACPI_ERR "unable to create proc entry %s\n",
7322 ibm->name);
7323 ret = -ENODEV;
7324 goto err_out;
7325 }
7326 entry->owner = THIS_MODULE;
7327 entry->data = ibm;
7328 entry->read_proc = &dispatch_procfs_read;
7329 if (ibm->write)
7330 entry->write_proc = &dispatch_procfs_write;
7331 ibm->flags.proc_created = 1;
7332 }
7333
7334 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7335
7336 return 0;
7337
7338 err_out:
7339 dbg_printk(TPACPI_DBG_INIT,
7340 "%s: at error exit path with result %d\n",
7341 ibm->name, ret);
7342
7343 ibm_exit(ibm);
7344 return (ret < 0)? ret : 0;
7345 }
7346
7347 /* Probing */
7348
7349 /* returns 0 - probe ok, or < 0 - probe error.
7350 * Probe ok doesn't mean thinkpad found.
7351 * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7352 static int __must_check __init get_thinkpad_model_data(
7353 struct thinkpad_id_data *tp)
7354 {
7355 const struct dmi_device *dev = NULL;
7356 char ec_fw_string[18];
7357 char const *s;
7358
7359 if (!tp)
7360 return -EINVAL;
7361
7362 memset(tp, 0, sizeof(*tp));
7363
7364 if (dmi_name_in_vendors("IBM"))
7365 tp->vendor = PCI_VENDOR_ID_IBM;
7366 else if (dmi_name_in_vendors("LENOVO"))
7367 tp->vendor = PCI_VENDOR_ID_LENOVO;
7368 else
7369 return 0;
7370
7371 s = dmi_get_system_info(DMI_BIOS_VERSION);
7372 tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7373 if (s && !tp->bios_version_str)
7374 return -ENOMEM;
7375 if (!tp->bios_version_str)
7376 return 0;
7377 tp->bios_model = tp->bios_version_str[0]
7378 | (tp->bios_version_str[1] << 8);
7379
7380 /*
7381 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7382 * X32 or newer, all Z series; Some models must have an
7383 * up-to-date BIOS or they will not be detected.
7384 *
7385 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7386 */
7387 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7388 if (sscanf(dev->name,
7389 "IBM ThinkPad Embedded Controller -[%17c",
7390 ec_fw_string) == 1) {
7391 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7392 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7393
7394 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7395 if (!tp->ec_version_str)
7396 return -ENOMEM;
7397 tp->ec_model = ec_fw_string[0]
7398 | (ec_fw_string[1] << 8);
7399 break;
7400 }
7401 }
7402
7403 s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7404 if (s && !strnicmp(s, "ThinkPad", 8)) {
7405 tp->model_str = kstrdup(s, GFP_KERNEL);
7406 if (!tp->model_str)
7407 return -ENOMEM;
7408 }
7409
7410 s = dmi_get_system_info(DMI_PRODUCT_NAME);
7411 tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7412 if (s && !tp->nummodel_str)
7413 return -ENOMEM;
7414
7415 return 0;
7416 }
7417
7418 static int __init probe_for_thinkpad(void)
7419 {
7420 int is_thinkpad;
7421
7422 if (acpi_disabled)
7423 return -ENODEV;
7424
7425 /*
7426 * Non-ancient models have better DMI tagging, but very old models
7427 * don't.
7428 */
7429 is_thinkpad = (thinkpad_id.model_str != NULL);
7430
7431 /* ec is required because many other handles are relative to it */
7432 TPACPI_ACPIHANDLE_INIT(ec);
7433 if (!ec_handle) {
7434 if (is_thinkpad)
7435 printk(TPACPI_ERR
7436 "Not yet supported ThinkPad detected!\n");
7437 return -ENODEV;
7438 }
7439
7440 /*
7441 * Risks a regression on very old machines, but reduces potential
7442 * false positives a damn great deal
7443 */
7444 if (!is_thinkpad)
7445 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7446
7447 if (!is_thinkpad && !force_load)
7448 return -ENODEV;
7449
7450 return 0;
7451 }
7452
7453
7454 /* Module init, exit, parameters */
7455
7456 static struct ibm_init_struct ibms_init[] __initdata = {
7457 {
7458 .init = thinkpad_acpi_driver_init,
7459 .data = &thinkpad_acpi_driver_data,
7460 },
7461 {
7462 .init = hotkey_init,
7463 .data = &hotkey_driver_data,
7464 },
7465 {
7466 .init = bluetooth_init,
7467 .data = &bluetooth_driver_data,
7468 },
7469 {
7470 .init = wan_init,
7471 .data = &wan_driver_data,
7472 },
7473 {
7474 .init = uwb_init,
7475 .data = &uwb_driver_data,
7476 },
7477 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7478 {
7479 .init = video_init,
7480 .data = &video_driver_data,
7481 },
7482 #endif
7483 {
7484 .init = light_init,
7485 .data = &light_driver_data,
7486 },
7487 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7488 {
7489 .init = dock_init,
7490 .data = &dock_driver_data[0],
7491 },
7492 {
7493 .init = dock_init2,
7494 .data = &dock_driver_data[1],
7495 },
7496 #endif
7497 #ifdef CONFIG_THINKPAD_ACPI_BAY
7498 {
7499 .init = bay_init,
7500 .data = &bay_driver_data,
7501 },
7502 #endif
7503 {
7504 .init = cmos_init,
7505 .data = &cmos_driver_data,
7506 },
7507 {
7508 .init = led_init,
7509 .data = &led_driver_data,
7510 },
7511 {
7512 .init = beep_init,
7513 .data = &beep_driver_data,
7514 },
7515 {
7516 .init = thermal_init,
7517 .data = &thermal_driver_data,
7518 },
7519 {
7520 .data = &ecdump_driver_data,
7521 },
7522 {
7523 .init = brightness_init,
7524 .data = &brightness_driver_data,
7525 },
7526 {
7527 .data = &volume_driver_data,
7528 },
7529 {
7530 .init = fan_init,
7531 .data = &fan_driver_data,
7532 },
7533 };
7534
7535 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7536 {
7537 unsigned int i;
7538 struct ibm_struct *ibm;
7539
7540 if (!kp || !kp->name || !val)
7541 return -EINVAL;
7542
7543 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7544 ibm = ibms_init[i].data;
7545 WARN_ON(ibm == NULL);
7546
7547 if (!ibm || !ibm->name)
7548 continue;
7549
7550 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7551 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7552 return -ENOSPC;
7553 strcpy(ibms_init[i].param, val);
7554 strcat(ibms_init[i].param, ",");
7555 return 0;
7556 }
7557 }
7558
7559 return -EINVAL;
7560 }
7561
7562 module_param(experimental, int, 0);
7563 MODULE_PARM_DESC(experimental,
7564 "Enables experimental features when non-zero");
7565
7566 module_param_named(debug, dbg_level, uint, 0);
7567 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7568
7569 module_param(force_load, bool, 0);
7570 MODULE_PARM_DESC(force_load,
7571 "Attempts to load the driver even on a "
7572 "mis-identified ThinkPad when true");
7573
7574 module_param_named(fan_control, fan_control_allowed, bool, 0);
7575 MODULE_PARM_DESC(fan_control,
7576 "Enables setting fan parameters features when true");
7577
7578 module_param_named(brightness_mode, brightness_mode, uint, 0);
7579 MODULE_PARM_DESC(brightness_mode,
7580 "Selects brightness control strategy: "
7581 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7582
7583 module_param(brightness_enable, uint, 0);
7584 MODULE_PARM_DESC(brightness_enable,
7585 "Enables backlight control when 1, disables when 0");
7586
7587 module_param(hotkey_report_mode, uint, 0);
7588 MODULE_PARM_DESC(hotkey_report_mode,
7589 "used for backwards compatibility with userspace, "
7590 "see documentation");
7591
7592 #define TPACPI_PARAM(feature) \
7593 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7594 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7595 "at module load, see documentation")
7596
7597 TPACPI_PARAM(hotkey);
7598 TPACPI_PARAM(bluetooth);
7599 TPACPI_PARAM(video);
7600 TPACPI_PARAM(light);
7601 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7602 TPACPI_PARAM(dock);
7603 #endif
7604 #ifdef CONFIG_THINKPAD_ACPI_BAY
7605 TPACPI_PARAM(bay);
7606 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7607 TPACPI_PARAM(cmos);
7608 TPACPI_PARAM(led);
7609 TPACPI_PARAM(beep);
7610 TPACPI_PARAM(ecdump);
7611 TPACPI_PARAM(brightness);
7612 TPACPI_PARAM(volume);
7613 TPACPI_PARAM(fan);
7614
7615 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7616 module_param(dbg_wlswemul, uint, 0);
7617 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7618 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7619 MODULE_PARM_DESC(wlsw_state,
7620 "Initial state of the emulated WLSW switch");
7621
7622 module_param(dbg_bluetoothemul, uint, 0);
7623 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7624 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7625 MODULE_PARM_DESC(bluetooth_state,
7626 "Initial state of the emulated bluetooth switch");
7627
7628 module_param(dbg_wwanemul, uint, 0);
7629 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7630 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7631 MODULE_PARM_DESC(wwan_state,
7632 "Initial state of the emulated WWAN switch");
7633
7634 module_param(dbg_uwbemul, uint, 0);
7635 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7636 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7637 MODULE_PARM_DESC(uwb_state,
7638 "Initial state of the emulated UWB switch");
7639 #endif
7640
7641 static void thinkpad_acpi_module_exit(void)
7642 {
7643 struct ibm_struct *ibm, *itmp;
7644
7645 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7646
7647 list_for_each_entry_safe_reverse(ibm, itmp,
7648 &tpacpi_all_drivers,
7649 all_drivers) {
7650 ibm_exit(ibm);
7651 }
7652
7653 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7654
7655 if (tpacpi_inputdev) {
7656 if (tp_features.input_device_registered)
7657 input_unregister_device(tpacpi_inputdev);
7658 else
7659 input_free_device(tpacpi_inputdev);
7660 }
7661
7662 if (tpacpi_hwmon)
7663 hwmon_device_unregister(tpacpi_hwmon);
7664
7665 if (tp_features.sensors_pdev_attrs_registered)
7666 device_remove_file(&tpacpi_sensors_pdev->dev,
7667 &dev_attr_thinkpad_acpi_pdev_name);
7668 if (tpacpi_sensors_pdev)
7669 platform_device_unregister(tpacpi_sensors_pdev);
7670 if (tpacpi_pdev)
7671 platform_device_unregister(tpacpi_pdev);
7672
7673 if (tp_features.sensors_pdrv_attrs_registered)
7674 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7675 if (tp_features.platform_drv_attrs_registered)
7676 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7677
7678 if (tp_features.sensors_pdrv_registered)
7679 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7680
7681 if (tp_features.platform_drv_registered)
7682 platform_driver_unregister(&tpacpi_pdriver);
7683
7684 if (proc_dir)
7685 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7686
7687 if (tpacpi_wq)
7688 destroy_workqueue(tpacpi_wq);
7689
7690 kfree(thinkpad_id.bios_version_str);
7691 kfree(thinkpad_id.ec_version_str);
7692 kfree(thinkpad_id.model_str);
7693 }
7694
7695
7696 static int __init thinkpad_acpi_module_init(void)
7697 {
7698 int ret, i;
7699
7700 tpacpi_lifecycle = TPACPI_LIFE_INIT;
7701
7702 /* Parameter checking */
7703 if (hotkey_report_mode > 2)
7704 return -EINVAL;
7705
7706 /* Driver-level probe */
7707
7708 ret = get_thinkpad_model_data(&thinkpad_id);
7709 if (ret) {
7710 printk(TPACPI_ERR
7711 "unable to get DMI data: %d\n", ret);
7712 thinkpad_acpi_module_exit();
7713 return ret;
7714 }
7715 ret = probe_for_thinkpad();
7716 if (ret) {
7717 thinkpad_acpi_module_exit();
7718 return ret;
7719 }
7720
7721 /* Driver initialization */
7722
7723 TPACPI_ACPIHANDLE_INIT(ecrd);
7724 TPACPI_ACPIHANDLE_INIT(ecwr);
7725
7726 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7727 if (!tpacpi_wq) {
7728 thinkpad_acpi_module_exit();
7729 return -ENOMEM;
7730 }
7731
7732 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7733 if (!proc_dir) {
7734 printk(TPACPI_ERR
7735 "unable to create proc dir " TPACPI_PROC_DIR);
7736 thinkpad_acpi_module_exit();
7737 return -ENODEV;
7738 }
7739 proc_dir->owner = THIS_MODULE;
7740
7741 ret = platform_driver_register(&tpacpi_pdriver);
7742 if (ret) {
7743 printk(TPACPI_ERR
7744 "unable to register main platform driver\n");
7745 thinkpad_acpi_module_exit();
7746 return ret;
7747 }
7748 tp_features.platform_drv_registered = 1;
7749
7750 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7751 if (ret) {
7752 printk(TPACPI_ERR
7753 "unable to register hwmon platform driver\n");
7754 thinkpad_acpi_module_exit();
7755 return ret;
7756 }
7757 tp_features.sensors_pdrv_registered = 1;
7758
7759 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7760 if (!ret) {
7761 tp_features.platform_drv_attrs_registered = 1;
7762 ret = tpacpi_create_driver_attributes(
7763 &tpacpi_hwmon_pdriver.driver);
7764 }
7765 if (ret) {
7766 printk(TPACPI_ERR
7767 "unable to create sysfs driver attributes\n");
7768 thinkpad_acpi_module_exit();
7769 return ret;
7770 }
7771 tp_features.sensors_pdrv_attrs_registered = 1;
7772
7773
7774 /* Device initialization */
7775 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7776 NULL, 0);
7777 if (IS_ERR(tpacpi_pdev)) {
7778 ret = PTR_ERR(tpacpi_pdev);
7779 tpacpi_pdev = NULL;
7780 printk(TPACPI_ERR "unable to register platform device\n");
7781 thinkpad_acpi_module_exit();
7782 return ret;
7783 }
7784 tpacpi_sensors_pdev = platform_device_register_simple(
7785 TPACPI_HWMON_DRVR_NAME,
7786 -1, NULL, 0);
7787 if (IS_ERR(tpacpi_sensors_pdev)) {
7788 ret = PTR_ERR(tpacpi_sensors_pdev);
7789 tpacpi_sensors_pdev = NULL;
7790 printk(TPACPI_ERR
7791 "unable to register hwmon platform device\n");
7792 thinkpad_acpi_module_exit();
7793 return ret;
7794 }
7795 ret = device_create_file(&tpacpi_sensors_pdev->dev,
7796 &dev_attr_thinkpad_acpi_pdev_name);
7797 if (ret) {
7798 printk(TPACPI_ERR
7799 "unable to create sysfs hwmon device attributes\n");
7800 thinkpad_acpi_module_exit();
7801 return ret;
7802 }
7803 tp_features.sensors_pdev_attrs_registered = 1;
7804 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7805 if (IS_ERR(tpacpi_hwmon)) {
7806 ret = PTR_ERR(tpacpi_hwmon);
7807 tpacpi_hwmon = NULL;
7808 printk(TPACPI_ERR "unable to register hwmon device\n");
7809 thinkpad_acpi_module_exit();
7810 return ret;
7811 }
7812 mutex_init(&tpacpi_inputdev_send_mutex);
7813 tpacpi_inputdev = input_allocate_device();
7814 if (!tpacpi_inputdev) {
7815 printk(TPACPI_ERR "unable to allocate input device\n");
7816 thinkpad_acpi_module_exit();
7817 return -ENOMEM;
7818 } else {
7819 /* Prepare input device, but don't register */
7820 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7821 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7822 tpacpi_inputdev->id.bustype = BUS_HOST;
7823 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7824 thinkpad_id.vendor :
7825 PCI_VENDOR_ID_IBM;
7826 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7827 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7828 }
7829 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7830 ret = ibm_init(&ibms_init[i]);
7831 if (ret >= 0 && *ibms_init[i].param)
7832 ret = ibms_init[i].data->write(ibms_init[i].param);
7833 if (ret < 0) {
7834 thinkpad_acpi_module_exit();
7835 return ret;
7836 }
7837 }
7838 ret = input_register_device(tpacpi_inputdev);
7839 if (ret < 0) {
7840 printk(TPACPI_ERR "unable to register input device\n");
7841 thinkpad_acpi_module_exit();
7842 return ret;
7843 } else {
7844 tp_features.input_device_registered = 1;
7845 }
7846
7847 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7848 return 0;
7849 }
7850
7851 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7852
7853 /*
7854 * DMI matching for module autoloading
7855 *
7856 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7857 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7858 *
7859 * Only models listed in thinkwiki will be supported, so add yours
7860 * if it is not there yet.
7861 */
7862 #define IBM_BIOS_MODULE_ALIAS(__type) \
7863 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7864
7865 /* Non-ancient thinkpads */
7866 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7867 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7868
7869 /* Ancient thinkpad BIOSes have to be identified by
7870 * BIOS type or model number, and there are far less
7871 * BIOS types than model numbers... */
7872 IBM_BIOS_MODULE_ALIAS("I[BDHIMNOTWVYZ]");
7873 IBM_BIOS_MODULE_ALIAS("1[0368A-GIKM-PST]");
7874 IBM_BIOS_MODULE_ALIAS("K[UX-Z]");
7875
7876 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7877 MODULE_DESCRIPTION(TPACPI_DESC);
7878 MODULE_VERSION(TPACPI_VERSION);
7879 MODULE_LICENSE("GPL");
7880
7881 module_init(thinkpad_acpi_module_init);
7882 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree