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ACPI: thinkpad-acpi: add debug mode
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / misc / thinkpad_acpi.c
CommitLineData
1da177e4 1/*
643f12db 2 * thinkpad_acpi.c - ThinkPad ACPI Extras
1da177e4
LT		 3 *
4 *
78f81cc4 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
a62bc916 6 * Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
1da177e4
LT		 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
a62bc916
HMH		 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
78f81cc4
BD		 22 */
23
643f12db 24#define IBM_VERSION "0.14"
78f81cc4
BD		 25
26/*
1da177e4 27 * Changelog:
643f12db
HMH		 28 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
29 * drivers/misc.
f9ff43a6
HMH		 30 *
31 * 2006-11-22 0.13 new maintainer
32 * changelog now lives in git commit history, and will
33 * not be updated further in-file.
837ca6dd 34 *
78f81cc4
BD		 35 * 2005-08-17 0.12 fix compilation on 2.6.13-rc kernels
36 * 2005-03-17 0.11 support for 600e, 770x
37 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
38 * support for 770e, G41
39 * G40 and G41 don't have a thinklight
40 * temperatures no longer experimental
41 * experimental brightness control
42 * experimental volume control
43 * experimental fan enable/disable
837ca6dd 44 * 2005-01-16 0.10 fix module loading on R30, R31
78f81cc4
BD		 45 * 2005-01-16 0.9 support for 570, R30, R31
46 * ultrabay support on A22p, A3x
47 * limit arg for cmos, led, beep, drop experimental status
48 * more capable led control on A21e, A22p, T20-22, X20
49 * experimental temperatures and fan speed
50 * experimental embedded controller register dump
51 * mark more functions as __init, drop incorrect __exit
52 * use MODULE_VERSION
53 * thanks to Henrik Brix Andersen <brix@gentoo.org>
54 * fix parameter passing on module loading
55 * thanks to Rusty Russell <rusty@rustcorp.com.au>
56 * thanks to Jim Radford <radford@blackbean.org>
57 * 2004-11-08 0.8 fix init error case, don't return from a macro
58 * thanks to Chris Wright <chrisw@osdl.org>
59 * 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
60 * fix led control on A21e
61 * 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
1da177e4
LT		 62 * 2004-10-18 0.5 thinklight support on A21e, G40, R32, T20, T21, X20
63 * proc file format changed
64 * video_switch command
65 * experimental cmos control
66 * experimental led control
67 * experimental acpi sounds
78f81cc4
BD		 68 * 2004-09-16 0.4 support for module parameters
69 * hotkey mask can be prefixed by 0x
70 * video output switching
71 * video expansion control
72 * ultrabay eject support
73 * removed lcd brightness/on/off control, didn't work
74 * 2004-08-17 0.3 support for R40
75 * lcd off, brightness control
76 * thinklight on/off
77 * 2004-08-14 0.2 support for T series, X20
78 * bluetooth enable/disable
79 * hotkey events disabled by default
80 * removed fan control, currently useless
81 * 2004-08-09 0.1 initial release, support for X series
1da177e4
LT		 82 */
83
f21f85de 84#include "thinkpad_acpi.h"
1da177e4 85
f9ff43a6 86MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
78f81cc4
BD		 87MODULE_DESCRIPTION(IBM_DESC);
88MODULE_VERSION(IBM_VERSION);
89MODULE_LICENSE("GPL");
90
d903ac54
HMH		 91/* Please remove this in year 2009 */
92MODULE_ALIAS("ibm_acpi");
93
1da177e4
LT		 94#define __unused __attribute__ ((unused))
95
56b6aeb0
HMH		 96/****************************************************************************
97 ****************************************************************************
98 *
99 * ACPI Helpers and device model
100 *
101 ****************************************************************************
102 ****************************************************************************/
103
104/*************************************************************************
105 * ACPI basic handles
106 */
1da177e4
LT		 107
108static acpi_handle root_handle = NULL;
109
110#define IBM_HANDLE(object, parent, paths...) \
111 static acpi_handle object##_handle; \
112 static acpi_handle *object##_parent = &parent##_handle; \
78f81cc4 113 static char *object##_path; \
1da177e4
LT		 114 static char *object##_paths[] = { paths }
115
78f81cc4
BD		 116IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
117 "\\_SB.PCI.ISA.EC", /* 570 */
118 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
119 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
120 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
121 "\\_SB.PCI0.ICH3.EC0", /* R31 */
122 "\\_SB.PCI0.LPC.EC", /* all others */
56b6aeb0 123 );
78f81cc4 124
56b6aeb0
HMH		 125IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
126IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
78f81cc4 127
56b6aeb0
HMH		 128
129/*************************************************************************
130 * Misc ACPI handles
131 */
78f81cc4
BD		 132
133IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
134 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
135 "\\CMS", /* R40, R40e */
56b6aeb0 136 ); /* all others */
78f81cc4
BD		 137
138IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
139 "^HKEY", /* R30, R31 */
140 "HKEY", /* all others */
56b6aeb0 141 ); /* 570 */
78f81cc4 142
78f81cc4 143
56b6aeb0
HMH		 144/*************************************************************************
145 * ACPI helpers
a8b7a662
HMH		 146 */
147
1da177e4
LT		 148static int acpi_evalf(acpi_handle handle,
149 void *res, char *method, char *fmt, ...)
150{
151 char *fmt0 = fmt;
78f81cc4
BD		 152 struct acpi_object_list params;
153 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
154 struct acpi_buffer result, *resultp;
155 union acpi_object out_obj;
156 acpi_status status;
157 va_list ap;
158 char res_type;
159 int success;
160 int quiet;
1da177e4
LT		 161
162 if (!*fmt) {
163 printk(IBM_ERR "acpi_evalf() called with empty format\n");
164 return 0;
165 }
166
167 if (*fmt == 'q') {
168 quiet = 1;
169 fmt++;
170 } else
171 quiet = 0;
172
173 res_type = *(fmt++);
174
175 params.count = 0;
176 params.pointer = &in_objs[0];
177
178 va_start(ap, fmt);
179 while (*fmt) {
180 char c = *(fmt++);
181 switch (c) {
182 case 'd': /* int */
183 in_objs[params.count].integer.value = va_arg(ap, int);
184 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
185 break;
78f81cc4 186 /* add more types as needed */
1da177e4
LT		 187 default:
188 printk(IBM_ERR "acpi_evalf() called "
189 "with invalid format character '%c'\n", c);
190 return 0;
191 }
192 }
193 va_end(ap);
194
78f81cc4
BD		 195 if (res_type != 'v') {
196 result.length = sizeof(out_obj);
197 result.pointer = &out_obj;
198 resultp = &result;
199 } else
200 resultp = NULL;
1da177e4 201
78f81cc4 202 status = acpi_evaluate_object(handle, method, &params, resultp);
1da177e4
LT		 203
204 switch (res_type) {
78f81cc4 205 case 'd': /* int */
1da177e4
LT		 206 if (res)
207 *(int *)res = out_obj.integer.value;
208 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
209 break;
78f81cc4 210 case 'v': /* void */
1da177e4
LT		 211 success = status == AE_OK;
212 break;
78f81cc4 213 /* add more types as needed */
1da177e4
LT		 214 default:
215 printk(IBM_ERR "acpi_evalf() called "
216 "with invalid format character '%c'\n", res_type);
217 return 0;
218 }
219
56b6aeb0
HMH		 220 if (!success && !quiet)
221 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
222 method, fmt0, status);
223
224 return success;
225}
226
227static void __unused acpi_print_int(acpi_handle handle, char *method)
228{
229 int i;
230
231 if (acpi_evalf(handle, &i, method, "d"))
232 printk(IBM_INFO "%s = 0x%x\n", method, i);
233 else
234 printk(IBM_ERR "error calling %s\n", method);
235}
236
237static int acpi_ec_read(int i, u8 * p)
238{
239 int v;
240
241 if (ecrd_handle) {
242 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
243 return 0;
244 *p = v;
245 } else {
246 if (ec_read(i, p) < 0)
247 return 0;
248 }
249
250 return 1;
251}
252
253static int acpi_ec_write(int i, u8 v)
254{
255 if (ecwr_handle) {
256 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
257 return 0;
258 } else {
259 if (ec_write(i, v) < 0)
260 return 0;
261 }
262
263 return 1;
264}
265
266static int _sta(acpi_handle handle)
267{
268 int status;
269
270 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
271 status = 0;
272
273 return status;
274}
275
276/*************************************************************************
277 * ACPI device model
278 */
279
280static void __init ibm_handle_init(char *name,
281 acpi_handle * handle, acpi_handle parent,
282 char **paths, int num_paths, char **path)
283{
284 int i;
285 acpi_status status;
286
287 for (i = 0; i < num_paths; i++) {
288 status = acpi_get_handle(parent, paths[i], handle);
289 if (ACPI_SUCCESS(status)) {
290 *path = paths[i];
291 return;
292 }
293 }
294
295 *handle = NULL;
296}
297
298static void dispatch_notify(acpi_handle handle, u32 event, void *data)
299{
300 struct ibm_struct *ibm = data;
301
302 if (!ibm || !ibm->notify)
303 return;
304
305 ibm->notify(ibm, event);
306}
307
308static int __init setup_notify(struct ibm_struct *ibm)
309{
310 acpi_status status;
311 int ret;
312
313 if (!*ibm->handle)
314 return 0;
315
316 ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
317 if (ret < 0) {
318 printk(IBM_ERR "%s device not present\n", ibm->name);
319 return -ENODEV;
320 }
321
322 acpi_driver_data(ibm->device) = ibm;
643f12db
HMH		 323 sprintf(acpi_device_class(ibm->device), "%s/%s",
324 IBM_ACPI_EVENT_PREFIX,
325 ibm->name);
56b6aeb0
HMH		 326
327 status = acpi_install_notify_handler(*ibm->handle, ibm->type,
328 dispatch_notify, ibm);
329 if (ACPI_FAILURE(status)) {
330 if (status == AE_ALREADY_EXISTS) {
331 printk(IBM_NOTICE "another device driver is already handling %s events\n",
332 ibm->name);
333 } else {
334 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
335 ibm->name, status);
336 }
337 return -ENODEV;
338 }
339 ibm->notify_installed = 1;
340 return 0;
341}
342
343static int __init ibm_device_add(struct acpi_device *device)
344{
345 return 0;
346}
347
6700121b 348static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
56b6aeb0
HMH		 349{
350 int ret;
351
352 ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
353 if (!ibm->driver) {
354 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
355 return -1;
356 }
357
358 sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
359 ibm->driver->ids = ibm->hid;
360 ibm->driver->ops.add = &ibm_device_add;
361
362 ret = acpi_bus_register_driver(ibm->driver);
363 if (ret < 0) {
364 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
365 ibm->hid, ret);
366 kfree(ibm->driver);
367 }
368
369 return ret;
370}
371
372
373/****************************************************************************
374 ****************************************************************************
375 *
376 * Procfs Helpers
377 *
378 ****************************************************************************
379 ****************************************************************************/
380
381static int dispatch_read(char *page, char **start, off_t off, int count,
382 int *eof, void *data)
383{
384 struct ibm_struct *ibm = data;
385 int len;
386
387 if (!ibm || !ibm->read)
388 return -EINVAL;
389
390 len = ibm->read(page);
391 if (len < 0)
392 return len;
393
394 if (len <= off + count)
395 *eof = 1;
396 *start = page + off;
397 len -= off;
398 if (len > count)
399 len = count;
400 if (len < 0)
401 len = 0;
402
403 return len;
404}
405
406static int dispatch_write(struct file *file, const char __user * userbuf,
407 unsigned long count, void *data)
408{
409 struct ibm_struct *ibm = data;
410 char *kernbuf;
411 int ret;
412
413 if (!ibm || !ibm->write)
414 return -EINVAL;
415
416 kernbuf = kmalloc(count + 2, GFP_KERNEL);
417 if (!kernbuf)
418 return -ENOMEM;
1da177e4 419
56b6aeb0
HMH		 420 if (copy_from_user(kernbuf, userbuf, count)) {
421 kfree(kernbuf);
422 return -EFAULT;
423 }
1da177e4 424
56b6aeb0
HMH		 425 kernbuf[count] = 0;
426 strcat(kernbuf, ",");
427 ret = ibm->write(kernbuf);
428 if (ret == 0)
429 ret = count;
1da177e4 430
56b6aeb0
HMH		 431 kfree(kernbuf);
432
433 return ret;
1da177e4
LT		 434}
435
436static char *next_cmd(char **cmds)
437{
438 char *start = *cmds;
439 char *end;
440
441 while ((end = strchr(start, ',')) && end == start)
442 start = end + 1;
443
444 if (!end)
445 return NULL;
446
447 *end = 0;
448 *cmds = end + 1;
449 return start;
450}
451
56b6aeb0
HMH		 452
453/****************************************************************************
454 ****************************************************************************
455 *
456 * Subdrivers
457 *
458 ****************************************************************************
459 ****************************************************************************/
460
461/*************************************************************************
142cfc90 462 * thinkpad-acpi init subdriver
56b6aeb0
HMH		 463 */
464
643f12db 465static int thinkpad_acpi_driver_init(void)
1da177e4
LT		 466{
467 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
468 printk(IBM_INFO "%s\n", IBM_URL);
469
3945ac36
HMH		 470 if (ibm_thinkpad_ec_found)
471 printk(IBM_INFO "ThinkPad EC firmware %s\n",
472 ibm_thinkpad_ec_found);
473
1da177e4
LT		 474 return 0;
475}
476
643f12db 477static int thinkpad_acpi_driver_read(char *p)
1da177e4
LT		 478{
479 int len = 0;
480
481 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
482 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
483
484 return len;
485}
486
56b6aeb0
HMH		 487/*************************************************************************
488 * Hotkey subdriver
489 */
490
78f81cc4
BD		 491static int hotkey_supported;
492static int hotkey_mask_supported;
493static int hotkey_orig_status;
494static int hotkey_orig_mask;
495
56b6aeb0
HMH		 496static int hotkey_init(void)
497{
498 /* hotkey not supported on 570 */
499 hotkey_supported = hkey_handle != NULL;
500
501 if (hotkey_supported) {
502 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
503 A30, R30, R31, T20-22, X20-21, X22-24 */
504 hotkey_mask_supported =
505 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
506
507 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
508 return -ENODEV;
509 }
510
511 return 0;
512}
513
514static void hotkey_exit(void)
515{
516 if (hotkey_supported)
517 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
518}
519
520static void hotkey_notify(struct ibm_struct *ibm, u32 event)
521{
522 int hkey;
523
524 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
525 acpi_bus_generate_event(ibm->device, event, hkey);
526 else {
527 printk(IBM_ERR "unknown hotkey event %d\n", event);
528 acpi_bus_generate_event(ibm->device, event, 0);
529 }
530}
531
78f81cc4 532static int hotkey_get(int *status, int *mask)
1da177e4
LT		 533{
534 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
78f81cc4
BD		 535 return 0;
536
537 if (hotkey_mask_supported)
538 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
539 return 0;
540
541 return 1;
1da177e4
LT		 542}
543
78f81cc4 544static int hotkey_set(int status, int mask)
1da177e4
LT		 545{
546 int i;
547
548 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1da177e4
LT		 549 return 0;
550
78f81cc4
BD		 551 if (hotkey_mask_supported)
552 for (i = 0; i < 32; i++) {
553 int bit = ((1 << i) & mask) != 0;
554 if (!acpi_evalf(hkey_handle,
555 NULL, "MHKM", "vdd", i + 1, bit))
556 return 0;
557 }
1da177e4 558
78f81cc4 559 return 1;
1da177e4
LT		 560}
561
78f81cc4 562static int hotkey_read(char *p)
1da177e4
LT		 563{
564 int status, mask;
565 int len = 0;
566
78f81cc4
BD		 567 if (!hotkey_supported) {
568 len += sprintf(p + len, "status:\t\tnot supported\n");
569 return len;
570 }
571
572 if (!hotkey_get(&status, &mask))
1da177e4
LT		 573 return -EIO;
574
575 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
78f81cc4 576 if (hotkey_mask_supported) {
1da177e4
LT		 577 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
578 len += sprintf(p + len,
579 "commands:\tenable, disable, reset, <mask>\n");
580 } else {
581 len += sprintf(p + len, "mask:\t\tnot supported\n");
582 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
583 }
584
585 return len;
586}
587
78f81cc4 588static int hotkey_write(char *buf)
1da177e4
LT		 589{
590 int status, mask;
591 char *cmd;
592 int do_cmd = 0;
593
78f81cc4 594 if (!hotkey_supported)
1da177e4
LT		 595 return -ENODEV;
596
78f81cc4
BD		 597 if (!hotkey_get(&status, &mask))
598 return -EIO;
599
1da177e4
LT		 600 while ((cmd = next_cmd(&buf))) {
601 if (strlencmp(cmd, "enable") == 0) {
602 status = 1;
603 } else if (strlencmp(cmd, "disable") == 0) {
604 status = 0;
605 } else if (strlencmp(cmd, "reset") == 0) {
78f81cc4
BD		 606 status = hotkey_orig_status;
607 mask = hotkey_orig_mask;
1da177e4
LT		 608 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
609 /* mask set */
610 } else if (sscanf(cmd, "%x", &mask) == 1) {
611 /* mask set */
612 } else
613 return -EINVAL;
614 do_cmd = 1;
615 }
616
78f81cc4 617 if (do_cmd && !hotkey_set(status, mask))
1da177e4
LT		 618 return -EIO;
619
620 return 0;
78f81cc4 621}
1da177e4 622
56b6aeb0
HMH		 623/*************************************************************************
624 * Bluetooth subdriver
625 */
1da177e4 626
78f81cc4
BD		 627static int bluetooth_supported;
628
629static int bluetooth_init(void)
1da177e4 630{
78f81cc4
BD		 631 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
632 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
633 bluetooth_supported = hkey_handle &&
634 acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
1da177e4
LT		 635
636 return 0;
637}
638
78f81cc4 639static int bluetooth_status(void)
1da177e4
LT		 640{
641 int status;
642
78f81cc4
BD		 643 if (!bluetooth_supported ||
644 !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1da177e4
LT		 645 status = 0;
646
647 return status;
648}
649
78f81cc4 650static int bluetooth_read(char *p)
1da177e4
LT		 651{
652 int len = 0;
78f81cc4 653 int status = bluetooth_status();
1da177e4 654
78f81cc4 655 if (!bluetooth_supported)
1da177e4
LT		 656 len += sprintf(p + len, "status:\t\tnot supported\n");
657 else if (!(status & 1))
658 len += sprintf(p + len, "status:\t\tnot installed\n");
659 else {
660 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
661 len += sprintf(p + len, "commands:\tenable, disable\n");
662 }
663
664 return len;
665}
666
78f81cc4 667static int bluetooth_write(char *buf)
1da177e4 668{
78f81cc4 669 int status = bluetooth_status();
1da177e4
LT		 670 char *cmd;
671 int do_cmd = 0;
672
78f81cc4
BD		 673 if (!bluetooth_supported)
674 return -ENODEV;
1da177e4
LT		 675
676 while ((cmd = next_cmd(&buf))) {
677 if (strlencmp(cmd, "enable") == 0) {
678 status |= 2;
679 } else if (strlencmp(cmd, "disable") == 0) {
680 status &= ~2;
681 } else
682 return -EINVAL;
683 do_cmd = 1;
684 }
685
686 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
78f81cc4 687 return -EIO;
1da177e4
LT		 688
689 return 0;
690}
691
56b6aeb0
HMH		 692/*************************************************************************
693 * Wan subdriver
694 */
695
42adb53c
JF		 696static int wan_supported;
697
698static int wan_init(void)
699{
700 wan_supported = hkey_handle &&
701 acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
702
703 return 0;
704}
705
706static int wan_status(void)
707{
708 int status;
709
8d297264 710 if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
42adb53c
JF		 711 status = 0;
712
713 return status;
714}
715
716static int wan_read(char *p)
717{
718 int len = 0;
719 int status = wan_status();
720
721 if (!wan_supported)
722 len += sprintf(p + len, "status:\t\tnot supported\n");
723 else if (!(status & 1))
724 len += sprintf(p + len, "status:\t\tnot installed\n");
725 else {
726 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
727 len += sprintf(p + len, "commands:\tenable, disable\n");
728 }
729
730 return len;
731}
732
733static int wan_write(char *buf)
734{
735 int status = wan_status();
736 char *cmd;
737 int do_cmd = 0;
738
739 if (!wan_supported)
740 return -ENODEV;
741
742 while ((cmd = next_cmd(&buf))) {
743 if (strlencmp(cmd, "enable") == 0) {
744 status |= 2;
745 } else if (strlencmp(cmd, "disable") == 0) {
746 status &= ~2;
747 } else
748 return -EINVAL;
749 do_cmd = 1;
750 }
751
752 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
753 return -EIO;
754
755 return 0;
756}
757
56b6aeb0
HMH		 758/*************************************************************************
759 * Video subdriver
760 */
761
9a8e1738
HMH		 762static enum video_access_mode video_supported;
763static int video_orig_autosw;
78f81cc4 764
56b6aeb0
HMH		 765IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
766 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
767 "\\_SB.PCI0.VID0", /* 770e */
768 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
769 "\\_SB.PCI0.AGP.VID", /* all others */
770 ); /* R30, R31 */
771
772IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
773
78f81cc4 774static int video_init(void)
1da177e4 775{
78f81cc4
BD		 776 int ivga;
777
778 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
779 /* G41, assume IVGA doesn't change */
780 vid_handle = vid2_handle;
781
782 if (!vid_handle)
783 /* video switching not supported on R30, R31 */
efa27145 784 video_supported = TPACPI_VIDEO_NONE;
78f81cc4
BD		 785 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
786 /* 570 */
efa27145 787 video_supported = TPACPI_VIDEO_570;
78f81cc4
BD		 788 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
789 /* 600e/x, 770e, 770x */
efa27145 790 video_supported = TPACPI_VIDEO_770;
78f81cc4
BD		 791 else
792 /* all others */
efa27145 793 video_supported = TPACPI_VIDEO_NEW;
1da177e4
LT		 794
795 return 0;
796}
797
56b6aeb0
HMH		 798static void video_exit(void)
799{
800 acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
801}
802
78f81cc4 803static int video_status(void)
1da177e4
LT		 804{
805 int status = 0;
806 int i;
807
efa27145 808 if (video_supported == TPACPI_VIDEO_570) {
78f81cc4
BD		 809 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
810 status = i & 3;
efa27145 811 } else if (video_supported == TPACPI_VIDEO_770) {
78f81cc4
BD		 812 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
813 status |= 0x01 * i;
814 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
815 status |= 0x02 * i;
efa27145 816 } else if (video_supported == TPACPI_VIDEO_NEW) {
78f81cc4
BD		 817 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
818 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
819 status |= 0x02 * i;
820
821 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
822 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
823 status |= 0x01 * i;
824 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
825 status |= 0x08 * i;
826 }
827
828 return status;
829}
1da177e4 830
78f81cc4
BD		 831static int video_autosw(void)
832{
833 int autosw = 0;
1da177e4 834
efa27145 835 if (video_supported == TPACPI_VIDEO_570)
78f81cc4 836 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
efa27145
HMH		 837 else if (video_supported == TPACPI_VIDEO_770 ||
838 video_supported == TPACPI_VIDEO_NEW)
78f81cc4 839 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
1da177e4 840
78f81cc4 841 return autosw & 1;
1da177e4
LT		 842}
843
78f81cc4
BD		 844static int video_switch(void)
845{
846 int autosw = video_autosw();
847 int ret;
848
849 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
850 return -EIO;
efa27145 851 ret = video_supported == TPACPI_VIDEO_570 ?
78f81cc4
BD		 852 acpi_evalf(ec_handle, NULL, "_Q16", "v") :
853 acpi_evalf(vid_handle, NULL, "VSWT", "v");
854 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
855
856 return ret;
857}
858
859static int video_expand(void)
860{
efa27145 861 if (video_supported == TPACPI_VIDEO_570)
78f81cc4 862 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
efa27145 863 else if (video_supported == TPACPI_VIDEO_770)
78f81cc4
BD		 864 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
865 else
866 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
867}
868
869static int video_switch2(int status)
870{
871 int ret;
872
efa27145 873 if (video_supported == TPACPI_VIDEO_570) {
78f81cc4
BD		 874 ret = acpi_evalf(NULL, NULL,
875 "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
efa27145 876 } else if (video_supported == TPACPI_VIDEO_770) {
78f81cc4
BD		 877 int autosw = video_autosw();
878 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
879 return -EIO;
880
881 ret = acpi_evalf(vid_handle, NULL,
882 "ASWT", "vdd", status * 0x100, 0);
883
884 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
885 } else {
886 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
887 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
888 }
889
890 return ret;
891}
892
56b6aeb0
HMH		 893static int video_read(char *p)
894{
895 int status = video_status();
896 int autosw = video_autosw();
897 int len = 0;
898
899 if (!video_supported) {
900 len += sprintf(p + len, "status:\t\tnot supported\n");
901 return len;
902 }
903
904 len += sprintf(p + len, "status:\t\tsupported\n");
905 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
906 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
efa27145 907 if (video_supported == TPACPI_VIDEO_NEW)
56b6aeb0
HMH		 908 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
909 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
910 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
911 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
efa27145 912 if (video_supported == TPACPI_VIDEO_NEW)
56b6aeb0
HMH		 913 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
914 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
915 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
916
917 return len;
918}
919
78f81cc4 920static int video_write(char *buf)
1da177e4
LT		 921{
922 char *cmd;
923 int enable, disable, status;
924
78f81cc4
BD		 925 if (!video_supported)
926 return -ENODEV;
927
1da177e4
LT		 928 enable = disable = 0;
929
930 while ((cmd = next_cmd(&buf))) {
931 if (strlencmp(cmd, "lcd_enable") == 0) {
932 enable |= 0x01;
933 } else if (strlencmp(cmd, "lcd_disable") == 0) {
934 disable |= 0x01;
935 } else if (strlencmp(cmd, "crt_enable") == 0) {
936 enable |= 0x02;
937 } else if (strlencmp(cmd, "crt_disable") == 0) {
938 disable |= 0x02;
efa27145 939 } else if (video_supported == TPACPI_VIDEO_NEW &&
78f81cc4 940 strlencmp(cmd, "dvi_enable") == 0) {
1da177e4 941 enable |= 0x08;
efa27145 942 } else if (video_supported == TPACPI_VIDEO_NEW &&
78f81cc4 943 strlencmp(cmd, "dvi_disable") == 0) {
1da177e4
LT		 944 disable |= 0x08;
945 } else if (strlencmp(cmd, "auto_enable") == 0) {
946 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
947 return -EIO;
948 } else if (strlencmp(cmd, "auto_disable") == 0) {
949 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
950 return -EIO;
951 } else if (strlencmp(cmd, "video_switch") == 0) {
78f81cc4 952 if (!video_switch())
1da177e4
LT		 953 return -EIO;
954 } else if (strlencmp(cmd, "expand_toggle") == 0) {
78f81cc4 955 if (!video_expand())
1da177e4
LT		 956 return -EIO;
957 } else
958 return -EINVAL;
959 }
960
961 if (enable || disable) {
78f81cc4
BD		 962 status = (video_status() & 0x0f & ~disable) | enable;
963 if (!video_switch2(status))
1da177e4
LT		 964 return -EIO;
965 }
966
967 return 0;
968}
969
56b6aeb0
HMH		 970/*************************************************************************
971 * Light (thinklight) subdriver
972 */
1da177e4 973
78f81cc4
BD		 974static int light_supported;
975static int light_status_supported;
976
56b6aeb0
HMH		 977IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
978IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
979
78f81cc4 980static int light_init(void)
1da177e4 981{
78f81cc4
BD		 982 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
983 light_supported = (cmos_handle || lght_handle) && !ledb_handle;
984
985 if (light_supported)
986 /* light status not supported on
987 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
988 light_status_supported = acpi_evalf(ec_handle, NULL,
989 "KBLT", "qv");
1da177e4
LT		 990
991 return 0;
992}
993
78f81cc4 994static int light_read(char *p)
1da177e4
LT		 995{
996 int len = 0;
997 int status = 0;
998
78f81cc4
BD		 999 if (!light_supported) {
1000 len += sprintf(p + len, "status:\t\tnot supported\n");
1001 } else if (!light_status_supported) {
1002 len += sprintf(p + len, "status:\t\tunknown\n");
1003 len += sprintf(p + len, "commands:\ton, off\n");
1004 } else {
1da177e4
LT		 1005 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1006 return -EIO;
1007 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
78f81cc4
BD		 1008 len += sprintf(p + len, "commands:\ton, off\n");
1009 }
1da177e4
LT		 1010
1011 return len;
1012}
1013
78f81cc4 1014static int light_write(char *buf)
1da177e4
LT		 1015{
1016 int cmos_cmd, lght_cmd;
1017 char *cmd;
1018 int success;
78f81cc4
BD		 1019
1020 if (!light_supported)
1021 return -ENODEV;
1022
1da177e4
LT		 1023 while ((cmd = next_cmd(&buf))) {
1024 if (strlencmp(cmd, "on") == 0) {
1025 cmos_cmd = 0x0c;
1026 lght_cmd = 1;
1027 } else if (strlencmp(cmd, "off") == 0) {
1028 cmos_cmd = 0x0d;
1029 lght_cmd = 0;
1030 } else
1031 return -EINVAL;
78f81cc4 1032
1da177e4 1033 success = cmos_handle ?
78f81cc4
BD		 1034 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1035 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1da177e4
LT		 1036 if (!success)
1037 return -EIO;
1038 }
1039
1040 return 0;
1041}
1042
56b6aeb0
HMH		 1043/*************************************************************************
1044 * Dock subdriver
1045 */
1da177e4 1046
56b6aeb0
HMH		 1047/* don't list other alternatives as we install a notify handler on the 570 */
1048IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
d2fadbbb 1049
85998248 1050#ifdef CONFIG_THINKPAD_ACPI_DOCK
56b6aeb0
HMH		 1051
1052IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1053 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1054 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1055 "\\_SB.PCI.ISA.SLCE", /* 570 */
1056 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1057
1da177e4
LT		 1058#define dock_docked() (_sta(dock_handle) & 1)
1059
56b6aeb0
HMH		 1060static void dock_notify(struct ibm_struct *ibm, u32 event)
1061{
1062 int docked = dock_docked();
1063 int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1064
1065 if (event == 1 && !pci) /* 570 */
1066 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1067 else if (event == 1 && pci) /* 570 */
1068 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1069 else if (event == 3 && docked)
1070 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1071 else if (event == 3 && !docked)
1072 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1073 else if (event == 0 && docked)
1074 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1075 else {
1076 printk(IBM_ERR "unknown dock event %d, status %d\n",
1077 event, _sta(dock_handle));
1078 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1079 }
1080}
1081
78f81cc4 1082static int dock_read(char *p)
1da177e4
LT		 1083{
1084 int len = 0;
1085 int docked = dock_docked();
1086
1087 if (!dock_handle)
1088 len += sprintf(p + len, "status:\t\tnot supported\n");
1089 else if (!docked)
1090 len += sprintf(p + len, "status:\t\tundocked\n");
1091 else {
1092 len += sprintf(p + len, "status:\t\tdocked\n");
1093 len += sprintf(p + len, "commands:\tdock, undock\n");
1094 }
1095
1096 return len;
1097}
1098
78f81cc4 1099static int dock_write(char *buf)
1da177e4
LT		 1100{
1101 char *cmd;
1102
1103 if (!dock_docked())
78f81cc4 1104 return -ENODEV;
1da177e4
LT		 1105
1106 while ((cmd = next_cmd(&buf))) {
1107 if (strlencmp(cmd, "undock") == 0) {
78f81cc4
BD		 1108 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1109 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
56b6aeb0
HMH		 1110 return -EIO;
1111 } else if (strlencmp(cmd, "dock") == 0) {
1112 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1113 return -EIO;
1114 } else
1115 return -EINVAL;
1da177e4 1116 }
56b6aeb0
HMH		 1117
1118 return 0;
1da177e4 1119}
56b6aeb0 1120
85998248 1121#endif /* CONFIG_THINKPAD_ACPI_DOCK */
56b6aeb0
HMH		 1122
1123/*************************************************************************
1124 * Bay subdriver
1125 */
1da177e4 1126
85998248 1127#ifdef CONFIG_THINKPAD_ACPI_BAY
78f81cc4
BD		 1128static int bay_status_supported;
1129static int bay_status2_supported;
1130static int bay_eject_supported;
1131static int bay_eject2_supported;
1da177e4 1132
56b6aeb0
HMH		 1133IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1134 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1135 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1136 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1137 ); /* A21e, R30, R31 */
1138IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1139 "_EJ0", /* all others */
1140 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1141IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1142 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1143 ); /* all others */
1144IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1145 "_EJ0", /* 770x */
1146 ); /* all others */
1147
78f81cc4 1148static int bay_init(void)
1da177e4 1149{
78f81cc4
BD		 1150 bay_status_supported = bay_handle &&
1151 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1152 bay_status2_supported = bay2_handle &&
1153 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1154
1155 bay_eject_supported = bay_handle && bay_ej_handle &&
1156 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1157 bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1158 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1da177e4
LT		 1159
1160 return 0;
1161}
1162
56b6aeb0
HMH		 1163static void bay_notify(struct ibm_struct *ibm, u32 event)
1164{
1165 acpi_bus_generate_event(ibm->device, event, 0);
1166}
1167
78f81cc4
BD		 1168#define bay_occupied(b) (_sta(b##_handle) & 1)
1169
1170static int bay_read(char *p)
1da177e4
LT		 1171{
1172 int len = 0;
78f81cc4
BD		 1173 int occupied = bay_occupied(bay);
1174 int occupied2 = bay_occupied(bay2);
1175 int eject, eject2;
1176
1177 len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1178 (occupied ? "occupied" : "unoccupied") :
1179 "not supported");
1180 if (bay_status2_supported)
1181 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1182 "occupied" : "unoccupied");
1183
1184 eject = bay_eject_supported && occupied;
1185 eject2 = bay_eject2_supported && occupied2;
1186
1187 if (eject && eject2)
1188 len += sprintf(p + len, "commands:\teject, eject2\n");
1189 else if (eject)
1da177e4 1190 len += sprintf(p + len, "commands:\teject\n");
78f81cc4
BD		 1191 else if (eject2)
1192 len += sprintf(p + len, "commands:\teject2\n");
1da177e4
LT		 1193
1194 return len;
1195}
1196
78f81cc4 1197static int bay_write(char *buf)
1da177e4
LT		 1198{
1199 char *cmd;
1200
78f81cc4
BD		 1201 if (!bay_eject_supported && !bay_eject2_supported)
1202 return -ENODEV;
1203
1da177e4 1204 while ((cmd = next_cmd(&buf))) {
78f81cc4
BD		 1205 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1206 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1207 return -EIO;
1208 } else if (bay_eject2_supported &&
1209 strlencmp(cmd, "eject2") == 0) {
1210 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1da177e4
LT		 1211 return -EIO;
1212 } else
1213 return -EINVAL;
1214 }
1215
1216 return 0;
78f81cc4 1217}
85998248 1218#endif /* CONFIG_THINKPAD_ACPI_BAY */
1da177e4 1219
56b6aeb0
HMH		 1220/*************************************************************************
1221 * CMOS subdriver
1222 */
1223
1224static int cmos_eval(int cmos_cmd)
1da177e4 1225{
56b6aeb0
HMH		 1226 if (cmos_handle)
1227 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1228 else
1229 return 1;
1da177e4
LT		 1230}
1231
78f81cc4 1232static int cmos_read(char *p)
1da177e4
LT		 1233{
1234 int len = 0;
1235
78f81cc4
BD		 1236 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1237 R30, R31, T20-22, X20-21 */
1da177e4
LT		 1238 if (!cmos_handle)
1239 len += sprintf(p + len, "status:\t\tnot supported\n");
1240 else {
1241 len += sprintf(p + len, "status:\t\tsupported\n");
78f81cc4 1242 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1da177e4
LT		 1243 }
1244
1245 return len;
1246}
1247
78f81cc4 1248static int cmos_write(char *buf)
1da177e4
LT		 1249{
1250 char *cmd;
1251 int cmos_cmd;
1252
1253 if (!cmos_handle)
1254 return -EINVAL;
1255
1256 while ((cmd = next_cmd(&buf))) {
78f81cc4
BD		 1257 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1258 cmos_cmd >= 0 && cmos_cmd <= 21) {
1da177e4
LT		 1259 /* cmos_cmd set */
1260 } else
1261 return -EINVAL;
1262
78f81cc4 1263 if (!cmos_eval(cmos_cmd))
1da177e4
LT		 1264 return -EIO;
1265 }
1266
1267 return 0;
78f81cc4
BD		 1268}
1269
56b6aeb0
HMH		 1270
1271/*************************************************************************
1272 * LED subdriver
1273 */
1274
9a8e1738 1275static enum led_access_mode led_supported;
78f81cc4 1276
56b6aeb0
HMH		 1277IBM_HANDLE(led, ec, "SLED", /* 570 */
1278 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1279 "LED", /* all others */
1280 ); /* R30, R31 */
1281
78f81cc4
BD		 1282static int led_init(void)
1283{
1284 if (!led_handle)
1285 /* led not supported on R30, R31 */
efa27145 1286 led_supported = TPACPI_LED_NONE;
78f81cc4
BD		 1287 else if (strlencmp(led_path, "SLED") == 0)
1288 /* 570 */
efa27145 1289 led_supported = TPACPI_LED_570;
78f81cc4
BD		 1290 else if (strlencmp(led_path, "SYSL") == 0)
1291 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
efa27145 1292 led_supported = TPACPI_LED_OLD;
78f81cc4
BD		 1293 else
1294 /* all others */
efa27145 1295 led_supported = TPACPI_LED_NEW;
78f81cc4
BD		 1296
1297 return 0;
1298}
1299
1300#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1301
1302static int led_read(char *p)
1da177e4
LT		 1303{
1304 int len = 0;
1305
78f81cc4
BD		 1306 if (!led_supported) {
1307 len += sprintf(p + len, "status:\t\tnot supported\n");
1308 return len;
1309 }
1310 len += sprintf(p + len, "status:\t\tsupported\n");
1311
efa27145 1312 if (led_supported == TPACPI_LED_570) {
78f81cc4
BD		 1313 /* 570 */
1314 int i, status;
1315 for (i = 0; i < 8; i++) {
1316 if (!acpi_evalf(ec_handle,
1317 &status, "GLED", "dd", 1 << i))
1318 return -EIO;
1319 len += sprintf(p + len, "%d:\t\t%s\n",
1320 i, led_status(status));
1321 }
1322 }
1323
1da177e4 1324 len += sprintf(p + len, "commands:\t"
78f81cc4 1325 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1da177e4
LT		 1326
1327 return len;
1328}
1329
78f81cc4
BD		 1330/* off, on, blink */
1331static const int led_sled_arg1[] = { 0, 1, 3 };
1332static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1333static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1334static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1335
78f81cc4 1336static int led_write(char *buf)
1da177e4
LT		 1337{
1338 char *cmd;
78f81cc4
BD		 1339 int led, ind, ret;
1340
1341 if (!led_supported)
1342 return -ENODEV;
1da177e4
LT		 1343
1344 while ((cmd = next_cmd(&buf))) {
78f81cc4 1345 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1da177e4
LT		 1346 return -EINVAL;
1347
78f81cc4
BD		 1348 if (strstr(cmd, "off")) {
1349 ind = 0;
1da177e4 1350 } else if (strstr(cmd, "on")) {
78f81cc4
BD		 1351 ind = 1;
1352 } else if (strstr(cmd, "blink")) {
1353 ind = 2;
1da177e4
LT		 1354 } else
1355 return -EINVAL;
78f81cc4 1356
efa27145 1357 if (led_supported == TPACPI_LED_570) {
78f81cc4
BD		 1358 /* 570 */
1359 led = 1 << led;
1da177e4 1360 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
78f81cc4 1361 led, led_sled_arg1[ind]))
1da177e4 1362 return -EIO;
efa27145 1363 } else if (led_supported == TPACPI_LED_OLD) {
78f81cc4
BD		 1364 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1365 led = 1 << led;
efa27145 1366 ret = ec_write(TPACPI_LED_EC_HLMS, led);
78f81cc4
BD		 1367 if (ret >= 0)
1368 ret =
efa27145 1369 ec_write(TPACPI_LED_EC_HLBL,
e062e034 1370 led * led_exp_hlbl[ind]);
78f81cc4
BD		 1371 if (ret >= 0)
1372 ret =
efa27145 1373 ec_write(TPACPI_LED_EC_HLCL,
e062e034 1374 led * led_exp_hlcl[ind]);
78f81cc4
BD		 1375 if (ret < 0)
1376 return ret;
1377 } else {
1378 /* all others */
1379 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1380 led, led_led_arg1[ind]))
1da177e4 1381 return -EIO;
78f81cc4
BD		 1382 }
1383 }
1384
1385 return 0;
1386}
1387
56b6aeb0
HMH		 1388/*************************************************************************
1389 * Beep subdriver
1390 */
1391
1392IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
1393
78f81cc4
BD		 1394static int beep_read(char *p)
1395{
1396 int len = 0;
1397
1398 if (!beep_handle)
1399 len += sprintf(p + len, "status:\t\tnot supported\n");
1400 else {
1401 len += sprintf(p + len, "status:\t\tsupported\n");
1402 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1403 }
1404
1405 return len;
1406}
1407
1408static int beep_write(char *buf)
1409{
1410 char *cmd;
1411 int beep_cmd;
1412
1413 if (!beep_handle)
1414 return -ENODEV;
1415
1416 while ((cmd = next_cmd(&buf))) {
1417 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1418 beep_cmd >= 0 && beep_cmd <= 17) {
1419 /* beep_cmd set */
1420 } else
1421 return -EINVAL;
1422 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1423 return -EIO;
1424 }
1425
1426 return 0;
1427}
1428
56b6aeb0
HMH		 1429/*************************************************************************
1430 * Thermal subdriver
1431 */
78f81cc4 1432
a26f878a 1433static enum thermal_access_mode thermal_read_mode;
78f81cc4
BD		 1434
1435static int thermal_init(void)
1436{
60eb0b35
HMH		 1437 u8 t, ta1, ta2;
1438 int i;
1439 int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1440
1441 if (ibm_thinkpad_ec_found && experimental) {
1442 /*
1443 * Direct EC access mode: sensors at registers
1444 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1445 * non-implemented, thermal sensors return 0x80 when
1446 * not available
1447 */
78f81cc4 1448
60eb0b35
HMH		 1449 ta1 = ta2 = 0;
1450 for (i = 0; i < 8; i++) {
1451 if (likely(acpi_ec_read(0x78 + i, &t))) {
1452 ta1 |= t;
1453 } else {
1454 ta1 = 0;
1455 break;
1456 }
1457 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1458 ta2 |= t;
1459 } else {
1460 ta1 = 0;
1461 break;
1462 }
1463 }
1464 if (ta1 == 0) {
1465 /* This is sheer paranoia, but we handle it anyway */
1466 if (acpi_tmp7) {
1467 printk(IBM_ERR
1468 "ThinkPad ACPI EC access misbehaving, "
1469 "falling back to ACPI TMPx access mode\n");
efa27145 1470 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
60eb0b35
HMH		 1471 } else {
1472 printk(IBM_ERR
1473 "ThinkPad ACPI EC access misbehaving, "
1474 "disabling thermal sensors access\n");
efa27145 1475 thermal_read_mode = TPACPI_THERMAL_NONE;
60eb0b35
HMH		 1476 }
1477 } else {
1478 thermal_read_mode =
1479 (ta2 != 0) ?
efa27145 1480 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
60eb0b35
HMH		 1481 }
1482 } else if (acpi_tmp7) {
a26f878a
HMH		 1483 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1484 /* 600e/x, 770e, 770x */
efa27145 1485 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
a26f878a
HMH		 1486 } else {
1487 /* Standard ACPI TMPx access, max 8 sensors */
efa27145 1488 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
a26f878a
HMH		 1489 }
1490 } else {
1491 /* temperatures not supported on 570, G4x, R30, R31, R32 */
efa27145 1492 thermal_read_mode = TPACPI_THERMAL_NONE;
a26f878a 1493 }
78f81cc4
BD		 1494
1495 return 0;
1496}
1497
a26f878a 1498static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
78f81cc4 1499{
a26f878a 1500 int i, t;
60eb0b35 1501 s8 tmp;
a26f878a 1502 char tmpi[] = "TMPi";
78f81cc4 1503
a26f878a
HMH		 1504 if (!s)
1505 return -EINVAL;
78f81cc4 1506
a26f878a 1507 switch (thermal_read_mode) {
efa27145
HMH		 1508#if TPACPI_MAX_THERMAL_SENSORS >= 16
1509 case TPACPI_THERMAL_TPEC_16:
60eb0b35
HMH		 1510 for (i = 0; i < 8; i++) {
1511 if (!acpi_ec_read(0xC0 + i, &tmp))
1512 return -EIO;
1513 s->temp[i + 8] = tmp * 1000;
1514 }
1515 /* fallthrough */
1516#endif
efa27145 1517 case TPACPI_THERMAL_TPEC_8:
60eb0b35
HMH		 1518 for (i = 0; i < 8; i++) {
1519 if (!acpi_ec_read(0x78 + i, &tmp))
78f81cc4 1520 return -EIO;
60eb0b35
HMH		 1521 s->temp[i] = tmp * 1000;
1522 }
efa27145 1523 return (thermal_read_mode == TPACPI_THERMAL_TPEC_16) ? 16 : 8;
78f81cc4 1524
efa27145 1525 case TPACPI_THERMAL_ACPI_UPDT:
a26f878a
HMH		 1526 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1527 return -EIO;
78f81cc4
BD		 1528 for (i = 0; i < 8; i++) {
1529 tmpi[3] = '0' + i;
1530 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1531 return -EIO;
a26f878a 1532 s->temp[i] = (t - 2732) * 100;
78f81cc4 1533 }
a26f878a 1534 return 8;
78f81cc4 1535
efa27145 1536 case TPACPI_THERMAL_ACPI_TMP07:
78f81cc4
BD		 1537 for (i = 0; i < 8; i++) {
1538 tmpi[3] = '0' + i;
1539 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1540 return -EIO;
a26f878a 1541 s->temp[i] = t * 1000;
78f81cc4 1542 }
a26f878a 1543 return 8;
78f81cc4 1544
efa27145 1545 case TPACPI_THERMAL_NONE:
a26f878a
HMH		 1546 default:
1547 return 0;
78f81cc4 1548 }
a26f878a
HMH		 1549}
1550
1551static int thermal_read(char *p)
1552{
1553 int len = 0;
1554 int n, i;
1555 struct ibm_thermal_sensors_struct t;
1556
1557 n = thermal_get_sensors(&t);
1558 if (unlikely(n < 0))
1559 return n;
1560
1561 len += sprintf(p + len, "temperatures:\t");
1562
1563 if (n > 0) {
1564 for (i = 0; i < (n - 1); i++)
1565 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1566 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1567 } else
1568 len += sprintf(p + len, "not supported\n");
78f81cc4
BD		 1569
1570 return len;
1571}
1572
56b6aeb0
HMH		 1573/*************************************************************************
1574 * EC Dump subdriver
1575 */
1576
78f81cc4
BD		 1577static u8 ecdump_regs[256];
1578
1579static int ecdump_read(char *p)
1580{
1581 int len = 0;
1582 int i, j;
1583 u8 v;
1584
1585 len += sprintf(p + len, "EC "
1586 " +00 +01 +02 +03 +04 +05 +06 +07"
1587 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1588 for (i = 0; i < 256; i += 16) {
1589 len += sprintf(p + len, "EC 0x%02x:", i);
1590 for (j = 0; j < 16; j++) {
1591 if (!acpi_ec_read(i + j, &v))
1592 break;
1593 if (v != ecdump_regs[i + j])
1594 len += sprintf(p + len, " *%02x", v);
1595 else
1596 len += sprintf(p + len, " %02x", v);
1597 ecdump_regs[i + j] = v;
1598 }
1599 len += sprintf(p + len, "\n");
1600 if (j != 16)
1601 break;
1602 }
1603
1604 /* These are way too dangerous to advertise openly... */
1605#if 0
1606 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1607 " (<offset> is 00-ff, <value> is 00-ff)\n");
1608 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1609 " (<offset> is 00-ff, <value> is 0-255)\n");
1610#endif
1611 return len;
1612}
1613
1614static int ecdump_write(char *buf)
1615{
1616 char *cmd;
1617 int i, v;
1618
1619 while ((cmd = next_cmd(&buf))) {
1620 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1621 /* i and v set */
1622 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1623 /* i and v set */
1624 } else
1625 return -EINVAL;
1626 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1627 if (!acpi_ec_write(i, v))
1da177e4
LT		 1628 return -EIO;
1629 } else
1630 return -EINVAL;
1631 }
1632
1633 return 0;
78f81cc4
BD		 1634}
1635
56b6aeb0
HMH		 1636/*************************************************************************
1637 * Backlight/brightness subdriver
1638 */
1639
1640static struct backlight_device *ibm_backlight_device = NULL;
1641
1642static struct backlight_ops ibm_backlight_data = {
1643 .get_brightness = brightness_get,
1644 .update_status = brightness_update_status,
1645};
1646
1647static int brightness_init(void)
1648{
1649 int b;
1650
1651 b = brightness_get(NULL);
1652 if (b < 0)
1653 return b;
1654
1655 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1656 &ibm_backlight_data);
1657 if (IS_ERR(ibm_backlight_device)) {
1658 printk(IBM_ERR "Could not register backlight device\n");
1659 return PTR_ERR(ibm_backlight_device);
1660 }
1661
1662 ibm_backlight_device->props.max_brightness = 7;
1663 ibm_backlight_device->props.brightness = b;
1664 backlight_update_status(ibm_backlight_device);
1665
1666 return 0;
1667}
1668
1669static void brightness_exit(void)
1670{
1671 if (ibm_backlight_device) {
1672 backlight_device_unregister(ibm_backlight_device);
1673 ibm_backlight_device = NULL;
1674 }
1675}
1676
1677static int brightness_update_status(struct backlight_device *bd)
1678{
1679 return brightness_set(
1680 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
1681 bd->props.power == FB_BLANK_UNBLANK) ?
1682 bd->props.brightness : 0);
1683}
1684
8acb0250
HM		 1685static int brightness_get(struct backlight_device *bd)
1686{
8d297264
HMH		 1687 u8 level;
1688 if (!acpi_ec_read(brightness_offset, &level))
1689 return -EIO;
8acb0250 1690
8d297264 1691 level &= 0x7;
fb87a811 1692
8d297264 1693 return level;
8acb0250
HM		 1694}
1695
8acb0250 1696static int brightness_set(int value)
1da177e4 1697{
78f81cc4 1698 int cmos_cmd, inc, i;
8acb0250
HM		 1699 int current_value = brightness_get(NULL);
1700
1701 value &= 7;
1702
56b6aeb0 1703 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
8acb0250
HM		 1704 inc = value > current_value ? 1 : -1;
1705 for (i = current_value; i != value; i += inc) {
1706 if (!cmos_eval(cmos_cmd))
1707 return -EIO;
1708 if (!acpi_ec_write(brightness_offset, i + inc))
1709 return -EIO;
1710 }
1711
1712 return 0;
1713}
1714
56b6aeb0
HMH		 1715static int brightness_read(char *p)
1716{
1717 int len = 0;
1718 int level;
1719
1720 if ((level = brightness_get(NULL)) < 0) {
1721 len += sprintf(p + len, "level:\t\tunreadable\n");
1722 } else {
1723 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1724 len += sprintf(p + len, "commands:\tup, down\n");
1725 len += sprintf(p + len, "commands:\tlevel <level>"
1726 " (<level> is 0-7)\n");
1727 }
1728
1729 return len;
1730}
1731
8acb0250
HM		 1732static int brightness_write(char *buf)
1733{
1734 int level;
78f81cc4 1735 int new_level;
1da177e4 1736 char *cmd;
1da177e4
LT		 1737
1738 while ((cmd = next_cmd(&buf))) {
8acb0250
HM		 1739 if ((level = brightness_get(NULL)) < 0)
1740 return level;
78f81cc4
BD		 1741 level &= 7;
1742
1743 if (strlencmp(cmd, "up") == 0) {
1744 new_level = level == 7 ? 7 : level + 1;
1745 } else if (strlencmp(cmd, "down") == 0) {
1746 new_level = level == 0 ? 0 : level - 1;
1747 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1748 new_level >= 0 && new_level <= 7) {
1749 /* new_level set */
1750 } else
1751 return -EINVAL;
1752
8acb0250 1753 brightness_set(new_level);
78f81cc4
BD		 1754 }
1755
1756 return 0;
1757}
1758
56b6aeb0
HMH		 1759/*************************************************************************
1760 * Volume subdriver
1761 */
fb87a811 1762
78f81cc4
BD		 1763static int volume_read(char *p)
1764{
1765 int len = 0;
1766 u8 level;
1767
1768 if (!acpi_ec_read(volume_offset, &level)) {
1769 len += sprintf(p + len, "level:\t\tunreadable\n");
1770 } else {
1771 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1772 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1773 len += sprintf(p + len, "commands:\tup, down, mute\n");
1774 len += sprintf(p + len, "commands:\tlevel <level>"
1775 " (<level> is 0-15)\n");
1776 }
1777
1778 return len;
1779}
1780
78f81cc4
BD		 1781static int volume_write(char *buf)
1782{
1783 int cmos_cmd, inc, i;
1784 u8 level, mute;
1785 int new_level, new_mute;
1786 char *cmd;
1787
1788 while ((cmd = next_cmd(&buf))) {
1789 if (!acpi_ec_read(volume_offset, &level))
1790 return -EIO;
1791 new_mute = mute = level & 0x40;
1792 new_level = level = level & 0xf;
1793
1794 if (strlencmp(cmd, "up") == 0) {
1795 if (mute)
1796 new_mute = 0;
1797 else
1798 new_level = level == 15 ? 15 : level + 1;
1799 } else if (strlencmp(cmd, "down") == 0) {
1800 if (mute)
1801 new_mute = 0;
1802 else
1803 new_level = level == 0 ? 0 : level - 1;
1804 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1805 new_level >= 0 && new_level <= 15) {
1806 /* new_level set */
1807 } else if (strlencmp(cmd, "mute") == 0) {
1808 new_mute = 0x40;
1da177e4
LT		 1809 } else
1810 return -EINVAL;
1811
78f81cc4 1812 if (new_level != level) { /* mute doesn't change */
56b6aeb0 1813 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
78f81cc4
BD		 1814 inc = new_level > level ? 1 : -1;
1815
1816 if (mute && (!cmos_eval(cmos_cmd) ||
1817 !acpi_ec_write(volume_offset, level)))
1818 return -EIO;
1819
1820 for (i = level; i != new_level; i += inc)
1821 if (!cmos_eval(cmos_cmd) ||
1822 !acpi_ec_write(volume_offset, i + inc))
1823 return -EIO;
1824
e062e034 1825 if (mute && (!cmos_eval(TP_CMOS_VOLUME_MUTE) ||
78f81cc4
BD		 1826 !acpi_ec_write(volume_offset,
1827 new_level + mute)))
1828 return -EIO;
1829 }
1830
1831 if (new_mute != mute) { /* level doesn't change */
56b6aeb0 1832 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
78f81cc4
BD		 1833
1834 if (!cmos_eval(cmos_cmd) ||
1835 !acpi_ec_write(volume_offset, level + new_mute))
1836 return -EIO;
1837 }
1838 }
1839
1840 return 0;
1841}
1842
56b6aeb0
HMH		 1843
1844/*************************************************************************
1845 * Fan subdriver
1846 */
1847
1848/*
1849 * FAN ACCESS MODES
1850 *
efa27145 1851 * TPACPI_FAN_RD_ACPI_GFAN:
56b6aeb0
HMH		 1852 * ACPI GFAN method: returns fan level
1853 *
efa27145 1854 * see TPACPI_FAN_WR_ACPI_SFAN
f51d1a39 1855 * EC 0x2f (HFSP) not available if GFAN exists
56b6aeb0 1856 *
efa27145 1857 * TPACPI_FAN_WR_ACPI_SFAN:
56b6aeb0
HMH		 1858 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
1859 *
f51d1a39
HMH		 1860 * EC 0x2f (HFSP) might be available *for reading*, but do not use
1861 * it for writing.
56b6aeb0 1862 *
efa27145 1863 * TPACPI_FAN_WR_TPEC:
f51d1a39
HMH		 1864 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
1865 * Supported on almost all ThinkPads
56b6aeb0
HMH		 1866 *
1867 * Fan speed changes of any sort (including those caused by the
1868 * disengaged mode) are usually done slowly by the firmware as the
1869 * maximum ammount of fan duty cycle change per second seems to be
1870 * limited.
1871 *
1872 * Reading is not available if GFAN exists.
1873 * Writing is not available if SFAN exists.
1874 *
1875 * Bits
1876 * 7 automatic mode engaged;
1877 * (default operation mode of the ThinkPad)
1878 * fan level is ignored in this mode.
f51d1a39 1879 * 6 full speed mode (takes precedence over bit 7);
56b6aeb0 1880 * not available on all thinkpads. May disable
f51d1a39
HMH		 1881 * the tachometer while the fan controller ramps up
1882 * the speed (which can take up to a few *minutes*).
1883 * Speeds up fan to 100% duty-cycle, which is far above
1884 * the standard RPM levels. It is not impossible that
1885 * it could cause hardware damage.
56b6aeb0
HMH		 1886 * 5-3 unused in some models. Extra bits for fan level
1887 * in others, but still useless as all values above
1888 * 7 map to the same speed as level 7 in these models.
1889 * 2-0 fan level (0..7 usually)
1890 * 0x00 = stop
1891 * 0x07 = max (set when temperatures critical)
1892 * Some ThinkPads may have other levels, see
efa27145 1893 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
56b6aeb0
HMH		 1894 *
1895 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
1896 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
1897 * does so, its initial value is meaningless (0x07).
1898 *
1899 * For firmware bugs, refer to:
1900 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
1901 *
1902 * ----
1903 *
1904 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
1905 * Main fan tachometer reading (in RPM)
1906 *
1907 * This register is present on all ThinkPads with a new-style EC, and
1908 * it is known not to be present on the A21m/e, and T22, as there is
1909 * something else in offset 0x84 according to the ACPI DSDT. Other
1910 * ThinkPads from this same time period (and earlier) probably lack the
1911 * tachometer as well.
1912 *
1913 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
1914 * was never fixed by IBM to report the EC firmware version string
1915 * probably support the tachometer (like the early X models), so
1916 * detecting it is quite hard. We need more data to know for sure.
1917 *
1918 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
1919 * might result.
1920 *
f51d1a39
HMH		 1921 * FIRMWARE BUG: may go stale while the EC is switching to full speed
1922 * mode.
56b6aeb0
HMH		 1923 *
1924 * For firmware bugs, refer to:
1925 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
1926 *
efa27145 1927 * TPACPI_FAN_WR_ACPI_FANS:
56b6aeb0
HMH		 1928 * ThinkPad X31, X40, X41. Not available in the X60.
1929 *
1930 * FANS ACPI handle: takes three arguments: low speed, medium speed,
1931 * high speed. ACPI DSDT seems to map these three speeds to levels
1932 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
1933 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
1934 *
1935 * The speeds are stored on handles
1936 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
1937 *
1938 * There are three default speed sets, acessible as handles:
1939 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
1940 *
1941 * ACPI DSDT switches which set is in use depending on various
1942 * factors.
1943 *
efa27145 1944 * TPACPI_FAN_WR_TPEC is also available and should be used to
56b6aeb0
HMH		 1945 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
1946 * but the ACPI tables just mention level 7.
1947 */
1948
69ba91cb
HMH		 1949static enum fan_status_access_mode fan_status_access_mode;
1950static enum fan_control_access_mode fan_control_access_mode;
1951static enum fan_control_commands fan_control_commands;
78f81cc4 1952
778b4d74
HMH		 1953static int fan_control_status_known;
1954static u8 fan_control_initial_status;
1955
25c68a33 1956static void fan_watchdog_fire(struct work_struct *ignored);
16663a87 1957static int fan_watchdog_maxinterval;
25c68a33 1958static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
16663a87 1959
56b6aeb0
HMH		 1960IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
1961IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
1962 "\\FSPD", /* 600e/x, 770e, 770x */
1963 ); /* all others */
1964IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
1965 "JFNS", /* 770x-JL */
1966 ); /* all others */
1967
69ba91cb 1968static int fan_init(void)
78f81cc4 1969{
efa27145
HMH		 1970 fan_status_access_mode = TPACPI_FAN_NONE;
1971 fan_control_access_mode = TPACPI_FAN_WR_NONE;
69ba91cb 1972 fan_control_commands = 0;
778b4d74 1973 fan_control_status_known = 1;
16663a87 1974 fan_watchdog_maxinterval = 0;
78f81cc4
BD		 1975
1976 if (gfan_handle) {
1977 /* 570, 600e/x, 770e, 770x */
efa27145 1978 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
69ba91cb
HMH		 1979 } else {
1980 /* all other ThinkPads: note that even old-style
1981 * ThinkPad ECs supports the fan control register */
778b4d74
HMH		 1982 if (likely(acpi_ec_read(fan_status_offset,
1983 &fan_control_initial_status))) {
efa27145 1984 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
778b4d74
HMH		 1985
1986 /* In some ThinkPads, neither the EC nor the ACPI
1987 * DSDT initialize the fan status, and it ends up
1988 * being set to 0x07 when it *could* be either
1989 * 0x07 or 0x80.
1990 *
1991 * Enable for TP-1Y (T43), TP-78 (R51e),
1992 * TP-76 (R52), TP-70 (T43, R52), which are known
1993 * to be buggy. */
1994 if (fan_control_initial_status == 0x07 &&
1995 ibm_thinkpad_ec_found &&
1996 ((ibm_thinkpad_ec_found[0] == '1' &&
1997 ibm_thinkpad_ec_found[1] == 'Y') ||
1998 (ibm_thinkpad_ec_found[0] == '7' &&
1999 (ibm_thinkpad_ec_found[1] == '6' ||
2000 ibm_thinkpad_ec_found[1] == '8' ||
2001 ibm_thinkpad_ec_found[1] == '0'))
2002 )) {
2003 printk(IBM_NOTICE
2004 "fan_init: initial fan status is "
2005 "unknown, assuming it is in auto "
2006 "mode\n");
2007 fan_control_status_known = 0;
2008 }
69ba91cb
HMH		 2009 } else {
2010 printk(IBM_ERR
2011 "ThinkPad ACPI EC access misbehaving, "
2012 "fan status and control unavailable\n");
2013 return 0;
2014 }
2015 }
78f81cc4 2016
69ba91cb
HMH		 2017 if (sfan_handle) {
2018 /* 570, 770x-JL */
efa27145 2019 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
1c6a334e 2020 fan_control_commands |=
efa27145 2021 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
78f81cc4 2022 } else {
69ba91cb
HMH		 2023 if (!gfan_handle) {
2024 /* gfan without sfan means no fan control */
2025 /* all other models implement TP EC 0x2f control */
2026
2027 if (fans_handle) {
a8b7a662 2028 /* X31, X40, X41 */
69ba91cb 2029 fan_control_access_mode =
efa27145 2030 TPACPI_FAN_WR_ACPI_FANS;
69ba91cb 2031 fan_control_commands |=
efa27145
HMH		 2032 TPACPI_FAN_CMD_SPEED |
2033 TPACPI_FAN_CMD_LEVEL |
2034 TPACPI_FAN_CMD_ENABLE;
69ba91cb 2035 } else {
efa27145 2036 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
a12095c2 2037 fan_control_commands |=
efa27145
HMH		 2038 TPACPI_FAN_CMD_LEVEL |
2039 TPACPI_FAN_CMD_ENABLE;
69ba91cb
HMH		 2040 }
2041 }
2042 }
2043
2044 return 0;
2045}
78f81cc4 2046
c52f0aa5 2047static int fan_get_status(u8 *status)
78f81cc4 2048{
c52f0aa5 2049 u8 s;
78f81cc4 2050
a8b7a662 2051 /* TODO:
efa27145 2052 * Add TPACPI_FAN_RD_ACPI_FANS ? */
a8b7a662 2053
3ef8a609 2054 switch (fan_status_access_mode) {
efa27145 2055 case TPACPI_FAN_RD_ACPI_GFAN:
78f81cc4 2056 /* 570, 600e/x, 770e, 770x */
c52f0aa5
HMH		 2057
2058 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1da177e4 2059 return -EIO;
78f81cc4 2060
c52f0aa5
HMH		 2061 if (likely(status))
2062 *status = s & 0x07;
3ef8a609
HMH		 2063
2064 break;
2065
efa27145 2066 case TPACPI_FAN_RD_TPEC:
78f81cc4 2067 /* all except 570, 600e/x, 770e, 770x */
c52f0aa5 2068 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3ef8a609 2069 return -EIO;
78f81cc4 2070
c52f0aa5
HMH		 2071 if (likely(status))
2072 *status = s;
2073
2074 break;
2075
2076 default:
2077 return -ENXIO;
78f81cc4
BD		 2078 }
2079
c52f0aa5
HMH		 2080 return 0;
2081}
2082
56b6aeb0
HMH		 2083static void fan_exit(void)
2084{
2085 cancel_delayed_work(&fan_watchdog_task);
2086 flush_scheduled_work();
2087}
2088
c52f0aa5
HMH		 2089static int fan_get_speed(unsigned int *speed)
2090{
2091 u8 hi, lo;
2092
2093 switch (fan_status_access_mode) {
efa27145 2094 case TPACPI_FAN_RD_TPEC:
78f81cc4 2095 /* all except 570, 600e/x, 770e, 770x */
3ef8a609
HMH		 2096 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
2097 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
2098 return -EIO;
3ef8a609 2099
c52f0aa5
HMH		 2100 if (likely(speed))
2101 *speed = (hi << 8) | lo;
2102
2103 break;
2104
2105 default:
2106 return -ENXIO;
2107 }
2108
2109 return 0;
2110}
2111
56b6aeb0 2112static void fan_watchdog_fire(struct work_struct *ignored)
16663a87 2113{
56b6aeb0
HMH		 2114 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2115 if (fan_set_enable()) {
2116 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2117 /* reschedule for later */
2118 fan_watchdog_reset();
2119 }
16663a87
HMH		 2120}
2121
2122static void fan_watchdog_reset(void)
2123{
2124 static int fan_watchdog_active = 0;
2125
2126 if (fan_watchdog_active)
2127 cancel_delayed_work(&fan_watchdog_task);
2128
2129 if (fan_watchdog_maxinterval > 0) {
2130 fan_watchdog_active = 1;
2131 if (!schedule_delayed_work(&fan_watchdog_task,
2132 msecs_to_jiffies(fan_watchdog_maxinterval
2133 * 1000))) {
2134 printk(IBM_ERR "failed to schedule the fan watchdog, "
2135 "watchdog will not trigger\n");
2136 }
2137 } else
2138 fan_watchdog_active = 0;
2139}
2140
18ad7996 2141static int fan_set_level(int level)
78f81cc4 2142{
18ad7996 2143 switch (fan_control_access_mode) {
efa27145 2144 case TPACPI_FAN_WR_ACPI_SFAN:
18ad7996 2145 if (level >= 0 && level <= 7) {
78f81cc4
BD		 2146 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2147 return -EIO;
18ad7996
HMH		 2148 } else
2149 return -EINVAL;
2150 break;
2151
efa27145
HMH		 2152 case TPACPI_FAN_WR_ACPI_FANS:
2153 case TPACPI_FAN_WR_TPEC:
2154 if ((level != TP_EC_FAN_AUTO) &&
2155 (level != TP_EC_FAN_FULLSPEED) &&
a12095c2
HMH		 2156 ((level < 0) || (level > 7)))
2157 return -EINVAL;
2158
2159 if (!acpi_ec_write(fan_status_offset, level))
2160 return -EIO;
778b4d74
HMH		 2161 else
2162 fan_control_status_known = 1;
a12095c2
HMH		 2163 break;
2164
18ad7996
HMH		 2165 default:
2166 return -ENXIO;
2167 }
2168 return 0;
2169}
2170
2171static int fan_set_enable(void)
2172{
1c6a334e
HMH		 2173 u8 s;
2174 int rc;
2175
18ad7996 2176 switch (fan_control_access_mode) {
efa27145
HMH		 2177 case TPACPI_FAN_WR_ACPI_FANS:
2178 case TPACPI_FAN_WR_TPEC:
1c6a334e
HMH		 2179 if ((rc = fan_get_status(&s)) < 0)
2180 return rc;
2181
2182 /* Don't go out of emergency fan mode */
2183 if (s != 7)
efa27145 2184 s = TP_EC_FAN_AUTO;
1c6a334e
HMH		 2185
2186 if (!acpi_ec_write(fan_status_offset, s))
2187 return -EIO;
778b4d74
HMH		 2188 else
2189 fan_control_status_known = 1;
1c6a334e
HMH		 2190 break;
2191
efa27145 2192 case TPACPI_FAN_WR_ACPI_SFAN:
1c6a334e
HMH		 2193 if ((rc = fan_get_status(&s)) < 0)
2194 return rc;
2195
2196 s &= 0x07;
2197
2198 /* Set fan to at least level 4 */
2199 if (s < 4)
2200 s = 4;
2201
2202 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
18ad7996
HMH		 2203 return -EIO;
2204 break;
2205
2206 default:
2207 return -ENXIO;
2208 }
2209 return 0;
2210}
2211
2212static int fan_set_disable(void)
2213{
2214 switch (fan_control_access_mode) {
efa27145
HMH		 2215 case TPACPI_FAN_WR_ACPI_FANS:
2216 case TPACPI_FAN_WR_TPEC:
18ad7996
HMH		 2217 if (!acpi_ec_write(fan_status_offset, 0x00))
2218 return -EIO;
778b4d74
HMH		 2219 else
2220 fan_control_status_known = 1;
18ad7996
HMH		 2221 break;
2222
efa27145 2223 case TPACPI_FAN_WR_ACPI_SFAN:
1c6a334e
HMH		 2224 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2225 return -EIO;
2226 break;
2227
18ad7996
HMH		 2228 default:
2229 return -ENXIO;
2230 }
56b6aeb0
HMH		 2231 return 0;
2232}
2233
2234static int fan_set_speed(int speed)
2235{
2236 switch (fan_control_access_mode) {
efa27145 2237 case TPACPI_FAN_WR_ACPI_FANS:
56b6aeb0
HMH		 2238 if (speed >= 0 && speed <= 65535) {
2239 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2240 speed, speed, speed))
2241 return -EIO;
2242 } else
2243 return -EINVAL;
2244 break;
2245
2246 default:
2247 return -ENXIO;
2248 }
2249 return 0;
2250}
2251
2252static int fan_read(char *p)
2253{
2254 int len = 0;
2255 int rc;
2256 u8 status;
2257 unsigned int speed = 0;
2258
2259 switch (fan_status_access_mode) {
efa27145 2260 case TPACPI_FAN_RD_ACPI_GFAN:
56b6aeb0
HMH		 2261 /* 570, 600e/x, 770e, 770x */
2262 if ((rc = fan_get_status(&status)) < 0)
2263 return rc;
2264
2265 len += sprintf(p + len, "status:\t\t%s\n"
2266 "level:\t\t%d\n",
2267 (status != 0) ? "enabled" : "disabled", status);
2268 break;
2269
efa27145 2270 case TPACPI_FAN_RD_TPEC:
56b6aeb0
HMH		 2271 /* all except 570, 600e/x, 770e, 770x */
2272 if ((rc = fan_get_status(&status)) < 0)
2273 return rc;
2274
2275 if (unlikely(!fan_control_status_known)) {
2276 if (status != fan_control_initial_status)
2277 fan_control_status_known = 1;
2278 else
2279 /* Return most likely status. In fact, it
2280 * might be the only possible status */
efa27145 2281 status = TP_EC_FAN_AUTO;
56b6aeb0
HMH		 2282 }
2283
2284 len += sprintf(p + len, "status:\t\t%s\n",
2285 (status != 0) ? "enabled" : "disabled");
2286
56b6aeb0
HMH		 2287 if ((rc = fan_get_speed(&speed)) < 0)
2288 return rc;
2289
2290 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2291
efa27145 2292 if (status & TP_EC_FAN_FULLSPEED)
56b6aeb0
HMH		 2293 /* Disengaged mode takes precedence */
2294 len += sprintf(p + len, "level:\t\tdisengaged\n");
efa27145 2295 else if (status & TP_EC_FAN_AUTO)
56b6aeb0
HMH		 2296 len += sprintf(p + len, "level:\t\tauto\n");
2297 else
2298 len += sprintf(p + len, "level:\t\t%d\n", status);
2299 break;
2300
efa27145 2301 case TPACPI_FAN_NONE:
56b6aeb0
HMH		 2302 default:
2303 len += sprintf(p + len, "status:\t\tnot supported\n");
2304 }
2305
efa27145 2306 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
56b6aeb0
HMH		 2307 len += sprintf(p + len, "commands:\tlevel <level>");
2308
2309 switch (fan_control_access_mode) {
efa27145 2310 case TPACPI_FAN_WR_ACPI_SFAN:
56b6aeb0
HMH		 2311 len += sprintf(p + len, " (<level> is 0-7)\n");
2312 break;
2313
2314 default:
2315 len += sprintf(p + len, " (<level> is 0-7, "
2316 "auto, disengaged)\n");
2317 break;
2318 }
2319 }
18ad7996 2320
efa27145 2321 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
56b6aeb0
HMH		 2322 len += sprintf(p + len, "commands:\tenable, disable\n"
2323 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2324 "1-120 (seconds))\n");
1da177e4 2325
efa27145 2326 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
56b6aeb0
HMH		 2327 len += sprintf(p + len, "commands:\tspeed <speed>"
2328 " (<speed> is 0-65535)\n");
2329
2330 return len;
78f81cc4
BD		 2331}
2332
18ad7996
HMH		 2333static int fan_write_cmd_level(const char *cmd, int *rc)
2334{
2335 int level;
2336
a12095c2 2337 if (strlencmp(cmd, "level auto") == 0)
efa27145 2338 level = TP_EC_FAN_AUTO;
a12095c2 2339 else if (strlencmp(cmd, "level disengaged") == 0)
efa27145 2340 level = TP_EC_FAN_FULLSPEED;
a12095c2 2341 else if (sscanf(cmd, "level %d", &level) != 1)
18ad7996
HMH		 2342 return 0;
2343
2344 if ((*rc = fan_set_level(level)) == -ENXIO)
2345 printk(IBM_ERR "level command accepted for unsupported "
2346 "access mode %d", fan_control_access_mode);
2347
2348 return 1;
2349}
2350
2351static int fan_write_cmd_enable(const char *cmd, int *rc)
2352{
2353 if (strlencmp(cmd, "enable") != 0)
2354 return 0;
2355
2356 if ((*rc = fan_set_enable()) == -ENXIO)
2357 printk(IBM_ERR "enable command accepted for unsupported "
2358 "access mode %d", fan_control_access_mode);
2359
2360 return 1;
2361}
2362
2363static int fan_write_cmd_disable(const char *cmd, int *rc)
2364{
2365 if (strlencmp(cmd, "disable") != 0)
2366 return 0;
2367
2368 if ((*rc = fan_set_disable()) == -ENXIO)
2369 printk(IBM_ERR "disable command accepted for unsupported "
2370 "access mode %d", fan_control_access_mode);
2371
2372 return 1;
2373}
2374
2375static int fan_write_cmd_speed(const char *cmd, int *rc)
2376{
2377 int speed;
2378
a8b7a662
HMH		 2379 /* TODO:
2380 * Support speed <low> <medium> <high> ? */
2381
18ad7996
HMH		 2382 if (sscanf(cmd, "speed %d", &speed) != 1)
2383 return 0;
2384
2385 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2386 printk(IBM_ERR "speed command accepted for unsupported "
2387 "access mode %d", fan_control_access_mode);
2388
2389 return 1;
2390}
2391
16663a87
HMH		 2392static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2393{
2394 int interval;
2395
2396 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2397 return 0;
2398
2399 if (interval < 0 || interval > 120)
2400 *rc = -EINVAL;
2401 else
2402 fan_watchdog_maxinterval = interval;
2403
2404 return 1;
2405}
2406
18ad7996
HMH		 2407static int fan_write(char *buf)
2408{
2409 char *cmd;
2410 int rc = 0;
2411
2412 while (!rc && (cmd = next_cmd(&buf))) {
efa27145 2413 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
18ad7996 2414 fan_write_cmd_level(cmd, &rc)) &&
efa27145 2415 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
18ad7996 2416 (fan_write_cmd_enable(cmd, &rc) ||
16663a87
HMH		 2417 fan_write_cmd_disable(cmd, &rc) ||
2418 fan_write_cmd_watchdog(cmd, &rc))) &&
efa27145 2419 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
18ad7996
HMH		 2420 fan_write_cmd_speed(cmd, &rc))
2421 )
2422 rc = -EINVAL;
16663a87
HMH		 2423 else if (!rc)
2424 fan_watchdog_reset();
18ad7996
HMH		 2425 }
2426
2427 return rc;
2428}
2429
56b6aeb0
HMH		 2430/****************************************************************************
2431 ****************************************************************************
2432 *
2433 * Infrastructure
2434 *
2435 ****************************************************************************
2436 ****************************************************************************/
2437
2438/* /proc support */
2439static struct proc_dir_entry *proc_dir = NULL;
16663a87 2440
56b6aeb0 2441/* Subdriver registry */
1da177e4
LT		 2442static struct ibm_struct ibms[] = {
2443 {
78f81cc4 2444 .name = "driver",
643f12db
HMH		 2445 .init = thinkpad_acpi_driver_init,
2446 .read = thinkpad_acpi_driver_read,
78f81cc4
BD		 2447 },
2448 {
2449 .name = "hotkey",
2450 .hid = IBM_HKEY_HID,
2451 .init = hotkey_init,
2452 .read = hotkey_read,
2453 .write = hotkey_write,
2454 .exit = hotkey_exit,
2455 .notify = hotkey_notify,
2456 .handle = &hkey_handle,
2457 .type = ACPI_DEVICE_NOTIFY,
2458 },
2459 {
2460 .name = "bluetooth",
2461 .init = bluetooth_init,
2462 .read = bluetooth_read,
2463 .write = bluetooth_write,
2464 },
42adb53c
JF		 2465 {
2466 .name = "wan",
2467 .init = wan_init,
2468 .read = wan_read,
2469 .write = wan_write,
2470 .experimental = 1,
2471 },
78f81cc4
BD		 2472 {
2473 .name = "video",
2474 .init = video_init,
2475 .read = video_read,
2476 .write = video_write,
2477 .exit = video_exit,
2478 },
1da177e4 2479 {
78f81cc4
BD		 2480 .name = "light",
2481 .init = light_init,
2482 .read = light_read,
2483 .write = light_write,
2484 },
85998248 2485#ifdef CONFIG_THINKPAD_ACPI_DOCK
1da177e4 2486 {
78f81cc4
BD		 2487 .name = "dock",
2488 .read = dock_read,
2489 .write = dock_write,
2490 .notify = dock_notify,
2491 .handle = &dock_handle,
2492 .type = ACPI_SYSTEM_NOTIFY,
2493 },
1da177e4 2494 {
78f81cc4
BD		 2495 .name = "dock",
2496 .hid = IBM_PCI_HID,
2497 .notify = dock_notify,
2498 .handle = &pci_handle,
2499 .type = ACPI_SYSTEM_NOTIFY,
2500 },
63e5f248 2501#endif
85998248 2502#ifdef CONFIG_THINKPAD_ACPI_BAY
1da177e4 2503 {
78f81cc4
BD		 2504 .name = "bay",
2505 .init = bay_init,
2506 .read = bay_read,
2507 .write = bay_write,
2508 .notify = bay_notify,
2509 .handle = &bay_handle,
2510 .type = ACPI_SYSTEM_NOTIFY,
2511 },
85998248 2512#endif /* CONFIG_THINKPAD_ACPI_BAY */
1da177e4 2513 {
78f81cc4
BD		 2514 .name = "cmos",
2515 .read = cmos_read,
2516 .write = cmos_write,
2517 },
1da177e4 2518 {
78f81cc4
BD		 2519 .name = "led",
2520 .init = led_init,
2521 .read = led_read,
2522 .write = led_write,
2523 },
1da177e4 2524 {
78f81cc4
BD		 2525 .name = "beep",
2526 .read = beep_read,
2527 .write = beep_write,
2528 },
1da177e4 2529 {
78f81cc4
BD		 2530 .name = "thermal",
2531 .init = thermal_init,
2532 .read = thermal_read,
2533 },
1da177e4 2534 {
78f81cc4
BD		 2535 .name = "ecdump",
2536 .read = ecdump_read,
2537 .write = ecdump_write,
2538 .experimental = 1,
2539 },
2540 {
2541 .name = "brightness",
2542 .read = brightness_read,
2543 .write = brightness_write,
fb87a811
HMH		 2544 .init = brightness_init,
2545 .exit = brightness_exit,
78f81cc4
BD		 2546 },
2547 {
2548 .name = "volume",
2549 .read = volume_read,
2550 .write = volume_write,
78f81cc4
BD		 2551 },
2552 {
2553 .name = "fan",
2554 .read = fan_read,
2555 .write = fan_write,
69ba91cb 2556 .init = fan_init,
16663a87 2557 .exit = fan_exit,
78f81cc4
BD		 2558 .experimental = 1,
2559 },
1da177e4 2560};
1da177e4 2561
56b6aeb0
HMH		 2562/*
2563 * Module and infrastructure proble, init and exit handling
2564 */
1da177e4 2565
78f81cc4 2566static int __init ibm_init(struct ibm_struct *ibm)
1da177e4
LT		 2567{
2568 int ret;
2569 struct proc_dir_entry *entry;
2570
2571 if (ibm->experimental && !experimental)
2572 return 0;
2573
2574 if (ibm->hid) {
6700121b 2575 ret = register_tpacpi_subdriver(ibm);
1da177e4
LT		 2576 if (ret < 0)
2577 return ret;
2578 ibm->driver_registered = 1;
2579 }
2580
2581 if (ibm->init) {
78f81cc4 2582 ret = ibm->init();
1da177e4
LT		 2583 if (ret != 0)
2584 return ret;
2585 ibm->init_called = 1;
2586 }
2587
78f81cc4
BD		 2588 if (ibm->read) {
2589 entry = create_proc_entry(ibm->name,
2590 S_IFREG | S_IRUGO | S_IWUSR,
2591 proc_dir);
2592 if (!entry) {
2593 printk(IBM_ERR "unable to create proc entry %s\n",
2594 ibm->name);
2595 return -ENODEV;
2596 }
2597 entry->owner = THIS_MODULE;
2598 entry->data = ibm;
1da177e4 2599 entry->read_proc = &dispatch_read;
78f81cc4
BD		 2600 if (ibm->write)
2601 entry->write_proc = &dispatch_write;
2602 ibm->proc_created = 1;
2603 }
1da177e4
LT		 2604
2605 if (ibm->notify) {
2606 ret = setup_notify(ibm);
96e89afe
HMH		 2607 if (ret == -ENODEV) {
2608 printk(IBM_NOTICE "disabling subdriver %s\n",
2609 ibm->name);
2610 ibm_exit(ibm);
2611 return 0;
2612 }
1da177e4
LT		 2613 if (ret < 0)
2614 return ret;
2615 }
2616
2617 return 0;
2618}
2619
2620static void ibm_exit(struct ibm_struct *ibm)
2621{
2622 if (ibm->notify_installed)
2623 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2624 dispatch_notify);
2625
2626 if (ibm->proc_created)
2627 remove_proc_entry(ibm->name, proc_dir);
2628
2629 if (ibm->init_called && ibm->exit)
78f81cc4 2630 ibm->exit();
1da177e4
LT		 2631
2632 if (ibm->driver_registered) {
2633 acpi_bus_unregister_driver(ibm->driver);
2634 kfree(ibm->driver);
2635 }
2636}
2637
56b6aeb0
HMH		 2638/* Probing */
2639
2640static char *ibm_thinkpad_ec_found = NULL;
2641
2642static char* __init check_dmi_for_ec(void)
1da177e4 2643{
56b6aeb0
HMH		 2644 struct dmi_device *dev = NULL;
2645 char ec_fw_string[18];
1da177e4 2646
56b6aeb0
HMH		 2647 /*
2648 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2649 * X32 or newer, all Z series; Some models must have an
2650 * up-to-date BIOS or they will not be detected.
2651 *
2652 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2653 */
2654 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2655 if (sscanf(dev->name,
2656 "IBM ThinkPad Embedded Controller -[%17c",
2657 ec_fw_string) == 1) {
2658 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2659 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2660 return kstrdup(ec_fw_string, GFP_KERNEL);
78f81cc4 2661 }
1da177e4 2662 }
56b6aeb0 2663 return NULL;
1da177e4
LT		 2664}
2665
56b6aeb0 2666/* Module init, exit, parameters */
1da177e4 2667
3945ac36 2668static int __init set_ibm_param(const char *val, struct kernel_param *kp)
1da177e4
LT		 2669{
2670 unsigned int i;
1da177e4 2671
78f81cc4
BD		 2672 for (i = 0; i < ARRAY_SIZE(ibms); i++)
2673 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2674 if (strlen(val) > sizeof(ibms[i].param) - 2)
2675 return -ENOSPC;
2676 strcpy(ibms[i].param, val);
2677 strcat(ibms[i].param, ",");
2678 return 0;
2679 }
1da177e4 2680
1da177e4
LT		 2681 return -EINVAL;
2682}
2683
56b6aeb0
HMH		 2684static int experimental;
2685module_param(experimental, int, 0);
2686
132ce091
HMH		 2687static u32 dbg_level;
2688module_param_named(debug, dbg_level, uint, 0);
2689
1da177e4
LT		 2690#define IBM_PARAM(feature) \
2691 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2692
78f81cc4
BD		 2693IBM_PARAM(hotkey);
2694IBM_PARAM(bluetooth);
2695IBM_PARAM(video);
2696IBM_PARAM(light);
85998248 2697#ifdef CONFIG_THINKPAD_ACPI_DOCK
78f81cc4 2698IBM_PARAM(dock);
63e5f248 2699#endif
85998248 2700#ifdef CONFIG_THINKPAD_ACPI_BAY
78f81cc4 2701IBM_PARAM(bay);
85998248 2702#endif /* CONFIG_THINKPAD_ACPI_BAY */
78f81cc4
BD		 2703IBM_PARAM(cmos);
2704IBM_PARAM(led);
2705IBM_PARAM(beep);
2706IBM_PARAM(ecdump);
2707IBM_PARAM(brightness);
2708IBM_PARAM(volume);
2709IBM_PARAM(fan);
2710
1def7115 2711static int __init thinkpad_acpi_module_init(void)
1da177e4
LT		 2712{
2713 int ret, i;
2714
2715 if (acpi_disabled)
2716 return -ENODEV;
2717
78f81cc4
BD		 2718 /* ec is required because many other handles are relative to it */
2719 IBM_HANDLE_INIT(ec);
2720 if (!ec_handle) {
2721 printk(IBM_ERR "ec object not found\n");
1da177e4 2722 return -ENODEV;
78f81cc4 2723 }
1da177e4 2724
60eb0b35
HMH		 2725 /* Models with newer firmware report the EC in DMI */
2726 ibm_thinkpad_ec_found = check_dmi_for_ec();
2727
1da177e4 2728 /* these handles are not required */
78f81cc4
BD		 2729 IBM_HANDLE_INIT(vid);
2730 IBM_HANDLE_INIT(vid2);
2731 IBM_HANDLE_INIT(ledb);
2732 IBM_HANDLE_INIT(led);
2733 IBM_HANDLE_INIT(hkey);
2734 IBM_HANDLE_INIT(lght);
2735 IBM_HANDLE_INIT(cmos);
85998248 2736#ifdef CONFIG_THINKPAD_ACPI_DOCK
78f81cc4 2737 IBM_HANDLE_INIT(dock);
63e5f248 2738#endif
78f81cc4 2739 IBM_HANDLE_INIT(pci);
85998248 2740#ifdef CONFIG_THINKPAD_ACPI_BAY
78f81cc4
BD		 2741 IBM_HANDLE_INIT(bay);
2742 if (bay_handle)
2743 IBM_HANDLE_INIT(bay_ej);
2744 IBM_HANDLE_INIT(bay2);
2745 if (bay2_handle)
2746 IBM_HANDLE_INIT(bay2_ej);
85998248 2747#endif /* CONFIG_THINKPAD_ACPI_BAY */
78f81cc4
BD		 2748 IBM_HANDLE_INIT(beep);
2749 IBM_HANDLE_INIT(ecrd);
2750 IBM_HANDLE_INIT(ecwr);
2751 IBM_HANDLE_INIT(fans);
2752 IBM_HANDLE_INIT(gfan);
2753 IBM_HANDLE_INIT(sfan);
1da177e4
LT		 2754
2755 proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2756 if (!proc_dir) {
2757 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
1def7115 2758 thinkpad_acpi_module_exit();
1da177e4
LT		 2759 return -ENODEV;
2760 }
2761 proc_dir->owner = THIS_MODULE;
78f81cc4
BD		 2762
2763 for (i = 0; i < ARRAY_SIZE(ibms); i++) {
1da177e4 2764 ret = ibm_init(&ibms[i]);
78f81cc4
BD		 2765 if (ret >= 0 && *ibms[i].param)
2766 ret = ibms[i].write(ibms[i].param);
1da177e4 2767 if (ret < 0) {
1def7115 2768 thinkpad_acpi_module_exit();
1da177e4
LT		 2769 return ret;
2770 }
2771 }
2772
2773 return 0;
2774}
2775
1def7115 2776static void thinkpad_acpi_module_exit(void)
56b6aeb0
HMH		 2777{
2778 int i;
2779
2780 for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2781 ibm_exit(&ibms[i]);
2782
2783 if (proc_dir)
2784 remove_proc_entry(IBM_DIR, acpi_root_dir);
2785
2786 if (ibm_thinkpad_ec_found)
2787 kfree(ibm_thinkpad_ec_found);
2788}
2789
1def7115
HMH		 2790module_init(thinkpad_acpi_module_init);
2791module_exit(thinkpad_acpi_module_exit);
kernel source for telekom puls (alcatel/mediatek)