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ACPI: thinkpad-acpi: clean up hotkey subdriver
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blobc60a56eee894fe7eb8811b49bfb1876543c4a900
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2007 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 IBM_VERSION "0.14"
25
26 /*
27 * Changelog:
28 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
29 * drivers/misc.
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.
34 *
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
44 * 2005-01-16 0.10 fix module loading on R30, R31
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
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
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
82 */
83
84 #include "thinkpad_acpi.h"
85
86 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
87 MODULE_DESCRIPTION(IBM_DESC);
88 MODULE_VERSION(IBM_VERSION);
89 MODULE_LICENSE("GPL");
90
91 /* Please remove this in year 2009 */
92 MODULE_ALIAS("ibm_acpi");
93
94 #define __unused __attribute__ ((unused))
95
96 /****************************************************************************
97 ****************************************************************************
98 *
99 * ACPI Helpers and device model
100 *
101 ****************************************************************************
102 ****************************************************************************/
103
104 /*************************************************************************
105 * ACPI basic handles
106 */
107
108 static 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; \
113 static char *object##_path; \
114 static char *object##_paths[] = { paths }
115
116 IBM_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 */
123 );
124
125 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
126 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
127
128
129 /*************************************************************************
130 * Misc ACPI handles
131 */
132
133 IBM_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 */
136 ); /* all others */
137
138 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
139 "^HKEY", /* R30, R31 */
140 "HKEY", /* all others */
141 ); /* 570 */
142
143
144 /*************************************************************************
145 * ACPI helpers
146 */
147
148 static int acpi_evalf(acpi_handle handle,
149 void *res, char *method, char *fmt, ...)
150 {
151 char *fmt0 = fmt;
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;
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;
186 /* add more types as needed */
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
195 if (res_type != 'v') {
196 result.length = sizeof(out_obj);
197 result.pointer = &out_obj;
198 resultp = &result;
199 } else
200 resultp = NULL;
201
202 status = acpi_evaluate_object(handle, method, &params, resultp);
203
204 switch (res_type) {
205 case 'd': /* int */
206 if (res)
207 *(int *)res = out_obj.integer.value;
208 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
209 break;
210 case 'v': /* void */
211 success = status == AE_OK;
212 break;
213 /* add more types as needed */
214 default:
215 printk(IBM_ERR "acpi_evalf() called "
216 "with invalid format character '%c'\n", res_type);
217 return 0;
218 }
219
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
227 static 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
237 static 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
253 static 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
266 static 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
280 static void drv_acpi_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
298 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
299 {
300 struct ibm_struct *ibm = data;
301
302 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
303 return;
304
305 ibm->acpi->notify(ibm, event);
306 }
307
308 static int __init setup_acpi_notify(struct ibm_struct *ibm)
309 {
310 acpi_status status;
311 int ret;
312
313 BUG_ON(!ibm->acpi);
314
315 if (!*ibm->acpi->handle)
316 return 0;
317
318 dbg_printk(TPACPI_DBG_INIT,
319 "setting up ACPI notify for %s\n", ibm->name);
320
321 ret = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
322 if (ret < 0) {
323 printk(IBM_ERR "%s device not present\n", ibm->name);
324 return -ENODEV;
325 }
326
327 acpi_driver_data(ibm->acpi->device) = ibm;
328 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
329 IBM_ACPI_EVENT_PREFIX,
330 ibm->name);
331
332 status = acpi_install_notify_handler(*ibm->acpi->handle,
333 ibm->acpi->type, dispatch_acpi_notify, ibm);
334 if (ACPI_FAILURE(status)) {
335 if (status == AE_ALREADY_EXISTS) {
336 printk(IBM_NOTICE "another device driver is already handling %s events\n",
337 ibm->name);
338 } else {
339 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
340 ibm->name, status);
341 }
342 return -ENODEV;
343 }
344 ibm->flags.acpi_notify_installed = 1;
345 return 0;
346 }
347
348 static int __init tpacpi_device_add(struct acpi_device *device)
349 {
350 return 0;
351 }
352
353 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
354 {
355 int ret;
356
357 dbg_printk(TPACPI_DBG_INIT,
358 "registering %s as an ACPI driver\n", ibm->name);
359
360 BUG_ON(!ibm->acpi);
361
362 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
363 if (!ibm->acpi->driver) {
364 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
365 return -ENOMEM;
366 }
367
368 sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
369 ibm->acpi->driver->ids = ibm->acpi->hid;
370 ibm->acpi->driver->ops.add = &tpacpi_device_add;
371
372 ret = acpi_bus_register_driver(ibm->acpi->driver);
373 if (ret < 0) {
374 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
375 ibm->acpi->hid, ret);
376 kfree(ibm->acpi->driver);
377 ibm->acpi->driver = NULL;
378 } else if (!ret)
379 ibm->flags.acpi_driver_registered = 1;
380
381 return ret;
382 }
383
384
385 /****************************************************************************
386 ****************************************************************************
387 *
388 * Procfs Helpers
389 *
390 ****************************************************************************
391 ****************************************************************************/
392
393 static int dispatch_procfs_read(char *page, char **start, off_t off,
394 int count, int *eof, void *data)
395 {
396 struct ibm_struct *ibm = data;
397 int len;
398
399 if (!ibm || !ibm->read)
400 return -EINVAL;
401
402 len = ibm->read(page);
403 if (len < 0)
404 return len;
405
406 if (len <= off + count)
407 *eof = 1;
408 *start = page + off;
409 len -= off;
410 if (len > count)
411 len = count;
412 if (len < 0)
413 len = 0;
414
415 return len;
416 }
417
418 static int dispatch_procfs_write(struct file *file,
419 const char __user * userbuf,
420 unsigned long count, void *data)
421 {
422 struct ibm_struct *ibm = data;
423 char *kernbuf;
424 int ret;
425
426 if (!ibm || !ibm->write)
427 return -EINVAL;
428
429 kernbuf = kmalloc(count + 2, GFP_KERNEL);
430 if (!kernbuf)
431 return -ENOMEM;
432
433 if (copy_from_user(kernbuf, userbuf, count)) {
434 kfree(kernbuf);
435 return -EFAULT;
436 }
437
438 kernbuf[count] = 0;
439 strcat(kernbuf, ",");
440 ret = ibm->write(kernbuf);
441 if (ret == 0)
442 ret = count;
443
444 kfree(kernbuf);
445
446 return ret;
447 }
448
449 static char *next_cmd(char **cmds)
450 {
451 char *start = *cmds;
452 char *end;
453
454 while ((end = strchr(start, ',')) && end == start)
455 start = end + 1;
456
457 if (!end)
458 return NULL;
459
460 *end = 0;
461 *cmds = end + 1;
462 return start;
463 }
464
465
466 /****************************************************************************
467 ****************************************************************************
468 *
469 * Subdrivers
470 *
471 ****************************************************************************
472 ****************************************************************************/
473
474 /*************************************************************************
475 * thinkpad-acpi init subdriver
476 */
477
478 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
479 {
480 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
481 printk(IBM_INFO "%s\n", IBM_URL);
482
483 if (ibm_thinkpad_ec_found)
484 printk(IBM_INFO "ThinkPad EC firmware %s\n",
485 ibm_thinkpad_ec_found);
486
487 return 0;
488 }
489
490 static int thinkpad_acpi_driver_read(char *p)
491 {
492 int len = 0;
493
494 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
495 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
496
497 return len;
498 }
499
500 static struct ibm_struct thinkpad_acpi_driver_data = {
501 .name = "driver",
502 .read = thinkpad_acpi_driver_read,
503 };
504
505 /*************************************************************************
506 * Hotkey subdriver
507 */
508
509 static int hotkey_orig_status;
510 static int hotkey_orig_mask;
511
512 static int __init hotkey_init(struct ibm_init_struct *iibm)
513 {
514 int res;
515
516 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
517
518 IBM_ACPIHANDLE_INIT(hkey);
519
520 /* hotkey not supported on 570 */
521 tp_features.hotkey = hkey_handle != NULL;
522
523 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
524 str_supported(tp_features.hotkey));
525
526 if (tp_features.hotkey) {
527 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
528 A30, R30, R31, T20-22, X20-21, X22-24 */
529 tp_features.hotkey_mask =
530 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
531
532 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
533 str_supported(tp_features.hotkey_mask));
534
535 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
536 if (res)
537 return res;
538 }
539
540 return (tp_features.hotkey)? 0 : 1;
541 }
542
543 static void hotkey_exit(void)
544 {
545 int res;
546
547 if (tp_features.hotkey) {
548 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
549 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
550 if (res)
551 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
552 }
553 }
554
555 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
556 {
557 int hkey;
558
559 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
560 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
561 else {
562 printk(IBM_ERR "unknown hotkey event %d\n", event);
563 acpi_bus_generate_event(ibm->acpi->device, event, 0);
564 }
565 }
566
567 static int hotkey_get(int *status, int *mask)
568 {
569 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
570 return -EIO;
571
572 if (tp_features.hotkey_mask)
573 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
574 return -EIO;
575
576 return 0;
577 }
578
579 static int hotkey_set(int status, int mask)
580 {
581 int i;
582
583 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
584 return -EIO;
585
586 if (tp_features.hotkey_mask)
587 for (i = 0; i < 32; i++) {
588 int bit = ((1 << i) & mask) != 0;
589 if (!acpi_evalf(hkey_handle,
590 NULL, "MHKM", "vdd", i + 1, bit))
591 return -EIO;
592 }
593
594 return 0;
595 }
596
597 static int hotkey_read(char *p)
598 {
599 int res, status, mask;
600 int len = 0;
601
602 if (!tp_features.hotkey) {
603 len += sprintf(p + len, "status:\t\tnot supported\n");
604 return len;
605 }
606
607 res = hotkey_get(&status, &mask);
608 if (res)
609 return res;
610
611 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
612 if (tp_features.hotkey_mask) {
613 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
614 len += sprintf(p + len,
615 "commands:\tenable, disable, reset, <mask>\n");
616 } else {
617 len += sprintf(p + len, "mask:\t\tnot supported\n");
618 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
619 }
620
621 return len;
622 }
623
624 static int hotkey_write(char *buf)
625 {
626 int res, status, mask;
627 char *cmd;
628 int do_cmd = 0;
629
630 if (!tp_features.hotkey)
631 return -ENODEV;
632
633 res = hotkey_get(&status, &mask);
634 if (res)
635 return res;
636
637 while ((cmd = next_cmd(&buf))) {
638 if (strlencmp(cmd, "enable") == 0) {
639 status = 1;
640 } else if (strlencmp(cmd, "disable") == 0) {
641 status = 0;
642 } else if (strlencmp(cmd, "reset") == 0) {
643 status = hotkey_orig_status;
644 mask = hotkey_orig_mask;
645 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
646 /* mask set */
647 } else if (sscanf(cmd, "%x", &mask) == 1) {
648 /* mask set */
649 } else
650 return -EINVAL;
651 do_cmd = 1;
652 }
653
654 if (do_cmd) {
655 res = hotkey_set(status, mask);
656 if (res)
657 return res;
658 }
659
660 return 0;
661 }
662
663 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
664 .hid = IBM_HKEY_HID,
665 .notify = hotkey_notify,
666 .handle = &hkey_handle,
667 .type = ACPI_DEVICE_NOTIFY,
668 };
669
670 static struct ibm_struct hotkey_driver_data = {
671 .name = "hotkey",
672 .read = hotkey_read,
673 .write = hotkey_write,
674 .exit = hotkey_exit,
675 .acpi = &ibm_hotkey_acpidriver,
676 };
677
678 /*************************************************************************
679 * Bluetooth subdriver
680 */
681
682 static int __init bluetooth_init(struct ibm_init_struct *iibm)
683 {
684 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
685
686 IBM_ACPIHANDLE_INIT(hkey);
687
688 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
689 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
690 tp_features.bluetooth = hkey_handle &&
691 acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
692
693 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s\n",
694 str_supported(tp_features.bluetooth));
695
696 return (tp_features.bluetooth)? 0 : 1;
697 }
698
699 static int bluetooth_status(void)
700 {
701 int status;
702
703 if (!tp_features.bluetooth ||
704 !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
705 status = 0;
706
707 return status;
708 }
709
710 static int bluetooth_read(char *p)
711 {
712 int len = 0;
713 int status = bluetooth_status();
714
715 if (!tp_features.bluetooth)
716 len += sprintf(p + len, "status:\t\tnot supported\n");
717 else if (!(status & 1))
718 len += sprintf(p + len, "status:\t\tnot installed\n");
719 else {
720 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
721 len += sprintf(p + len, "commands:\tenable, disable\n");
722 }
723
724 return len;
725 }
726
727 static int bluetooth_write(char *buf)
728 {
729 int status = bluetooth_status();
730 char *cmd;
731 int do_cmd = 0;
732
733 if (!tp_features.bluetooth)
734 return -ENODEV;
735
736 while ((cmd = next_cmd(&buf))) {
737 if (strlencmp(cmd, "enable") == 0) {
738 status |= 2;
739 } else if (strlencmp(cmd, "disable") == 0) {
740 status &= ~2;
741 } else
742 return -EINVAL;
743 do_cmd = 1;
744 }
745
746 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
747 return -EIO;
748
749 return 0;
750 }
751
752 static struct ibm_struct bluetooth_driver_data = {
753 .name = "bluetooth",
754 .read = bluetooth_read,
755 .write = bluetooth_write,
756 };
757
758 /*************************************************************************
759 * Wan subdriver
760 */
761
762 static int __init wan_init(struct ibm_init_struct *iibm)
763 {
764 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
765
766 IBM_ACPIHANDLE_INIT(hkey);
767
768 tp_features.wan = hkey_handle &&
769 acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
770
771 vdbg_printk(TPACPI_DBG_INIT, "wan is %s\n",
772 str_supported(tp_features.wan));
773
774 return (tp_features.wan)? 0 : 1;
775 }
776
777 static int wan_status(void)
778 {
779 int status;
780
781 if (!tp_features.wan ||
782 !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
783 status = 0;
784
785 return status;
786 }
787
788 static int wan_read(char *p)
789 {
790 int len = 0;
791 int status = wan_status();
792
793 if (!tp_features.wan)
794 len += sprintf(p + len, "status:\t\tnot supported\n");
795 else if (!(status & 1))
796 len += sprintf(p + len, "status:\t\tnot installed\n");
797 else {
798 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
799 len += sprintf(p + len, "commands:\tenable, disable\n");
800 }
801
802 return len;
803 }
804
805 static int wan_write(char *buf)
806 {
807 int status = wan_status();
808 char *cmd;
809 int do_cmd = 0;
810
811 if (!tp_features.wan)
812 return -ENODEV;
813
814 while ((cmd = next_cmd(&buf))) {
815 if (strlencmp(cmd, "enable") == 0) {
816 status |= 2;
817 } else if (strlencmp(cmd, "disable") == 0) {
818 status &= ~2;
819 } else
820 return -EINVAL;
821 do_cmd = 1;
822 }
823
824 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
825 return -EIO;
826
827 return 0;
828 }
829
830 static struct ibm_struct wan_driver_data = {
831 .name = "wan",
832 .read = wan_read,
833 .write = wan_write,
834 .flags.experimental = 1,
835 };
836
837 /*************************************************************************
838 * Video subdriver
839 */
840
841 static enum video_access_mode video_supported;
842 static int video_orig_autosw;
843
844 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
845 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
846 "\\_SB.PCI0.VID0", /* 770e */
847 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
848 "\\_SB.PCI0.AGP.VID", /* all others */
849 ); /* R30, R31 */
850
851 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
852
853 static int __init video_init(struct ibm_init_struct *iibm)
854 {
855 int ivga;
856
857 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
858
859 IBM_ACPIHANDLE_INIT(vid);
860 IBM_ACPIHANDLE_INIT(vid2);
861
862 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
863 /* G41, assume IVGA doesn't change */
864 vid_handle = vid2_handle;
865
866 if (!vid_handle)
867 /* video switching not supported on R30, R31 */
868 video_supported = TPACPI_VIDEO_NONE;
869 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
870 /* 570 */
871 video_supported = TPACPI_VIDEO_570;
872 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
873 /* 600e/x, 770e, 770x */
874 video_supported = TPACPI_VIDEO_770;
875 else
876 /* all others */
877 video_supported = TPACPI_VIDEO_NEW;
878
879 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
880 str_supported(video_supported != TPACPI_VIDEO_NONE),
881 video_supported);
882
883 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
884 }
885
886 static void video_exit(void)
887 {
888 dbg_printk(TPACPI_DBG_EXIT, "restoring original video autoswitch mode\n");
889 acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
890 }
891
892 static int video_status(void)
893 {
894 int status = 0;
895 int i;
896
897 if (video_supported == TPACPI_VIDEO_570) {
898 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
899 status = i & 3;
900 } else if (video_supported == TPACPI_VIDEO_770) {
901 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
902 status |= 0x01 * i;
903 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
904 status |= 0x02 * i;
905 } else if (video_supported == TPACPI_VIDEO_NEW) {
906 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
907 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
908 status |= 0x02 * i;
909
910 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
911 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
912 status |= 0x01 * i;
913 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
914 status |= 0x08 * i;
915 }
916
917 return status;
918 }
919
920 static int video_autosw(void)
921 {
922 int autosw = 0;
923
924 if (video_supported == TPACPI_VIDEO_570)
925 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
926 else if (video_supported == TPACPI_VIDEO_770 ||
927 video_supported == TPACPI_VIDEO_NEW)
928 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
929
930 return autosw & 1;
931 }
932
933 static int video_switch(void)
934 {
935 int autosw = video_autosw();
936 int ret;
937
938 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
939 return -EIO;
940 ret = video_supported == TPACPI_VIDEO_570 ?
941 acpi_evalf(ec_handle, NULL, "_Q16", "v") :
942 acpi_evalf(vid_handle, NULL, "VSWT", "v");
943 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
944
945 return ret;
946 }
947
948 static int video_expand(void)
949 {
950 if (video_supported == TPACPI_VIDEO_570)
951 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
952 else if (video_supported == TPACPI_VIDEO_770)
953 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
954 else
955 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
956 }
957
958 static int video_switch2(int status)
959 {
960 int ret;
961
962 if (video_supported == TPACPI_VIDEO_570) {
963 ret = acpi_evalf(NULL, NULL,
964 "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
965 } else if (video_supported == TPACPI_VIDEO_770) {
966 int autosw = video_autosw();
967 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
968 return -EIO;
969
970 ret = acpi_evalf(vid_handle, NULL,
971 "ASWT", "vdd", status * 0x100, 0);
972
973 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
974 } else {
975 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
976 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
977 }
978
979 return ret;
980 }
981
982 static int video_read(char *p)
983 {
984 int status = video_status();
985 int autosw = video_autosw();
986 int len = 0;
987
988 if (!video_supported) {
989 len += sprintf(p + len, "status:\t\tnot supported\n");
990 return len;
991 }
992
993 len += sprintf(p + len, "status:\t\tsupported\n");
994 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
995 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
996 if (video_supported == TPACPI_VIDEO_NEW)
997 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
998 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
999 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1000 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1001 if (video_supported == TPACPI_VIDEO_NEW)
1002 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1003 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1004 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1005
1006 return len;
1007 }
1008
1009 static int video_write(char *buf)
1010 {
1011 char *cmd;
1012 int enable, disable, status;
1013
1014 if (!video_supported)
1015 return -ENODEV;
1016
1017 enable = disable = 0;
1018
1019 while ((cmd = next_cmd(&buf))) {
1020 if (strlencmp(cmd, "lcd_enable") == 0) {
1021 enable |= 0x01;
1022 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1023 disable |= 0x01;
1024 } else if (strlencmp(cmd, "crt_enable") == 0) {
1025 enable |= 0x02;
1026 } else if (strlencmp(cmd, "crt_disable") == 0) {
1027 disable |= 0x02;
1028 } else if (video_supported == TPACPI_VIDEO_NEW &&
1029 strlencmp(cmd, "dvi_enable") == 0) {
1030 enable |= 0x08;
1031 } else if (video_supported == TPACPI_VIDEO_NEW &&
1032 strlencmp(cmd, "dvi_disable") == 0) {
1033 disable |= 0x08;
1034 } else if (strlencmp(cmd, "auto_enable") == 0) {
1035 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
1036 return -EIO;
1037 } else if (strlencmp(cmd, "auto_disable") == 0) {
1038 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
1039 return -EIO;
1040 } else if (strlencmp(cmd, "video_switch") == 0) {
1041 if (!video_switch())
1042 return -EIO;
1043 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1044 if (!video_expand())
1045 return -EIO;
1046 } else
1047 return -EINVAL;
1048 }
1049
1050 if (enable || disable) {
1051 status = (video_status() & 0x0f & ~disable) | enable;
1052 if (!video_switch2(status))
1053 return -EIO;
1054 }
1055
1056 return 0;
1057 }
1058
1059 static struct ibm_struct video_driver_data = {
1060 .name = "video",
1061 .read = video_read,
1062 .write = video_write,
1063 .exit = video_exit,
1064 };
1065
1066 /*************************************************************************
1067 * Light (thinklight) subdriver
1068 */
1069
1070 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1071 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1072
1073 static int __init light_init(struct ibm_init_struct *iibm)
1074 {
1075 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1076
1077 IBM_ACPIHANDLE_INIT(ledb);
1078 IBM_ACPIHANDLE_INIT(lght);
1079 IBM_ACPIHANDLE_INIT(cmos);
1080
1081 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1082 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1083
1084 if (tp_features.light)
1085 /* light status not supported on
1086 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1087 tp_features.light_status =
1088 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1089
1090 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1091 str_supported(tp_features.light));
1092
1093 return (tp_features.light)? 0 : 1;
1094 }
1095
1096 static int light_read(char *p)
1097 {
1098 int len = 0;
1099 int status = 0;
1100
1101 if (!tp_features.light) {
1102 len += sprintf(p + len, "status:\t\tnot supported\n");
1103 } else if (!tp_features.light_status) {
1104 len += sprintf(p + len, "status:\t\tunknown\n");
1105 len += sprintf(p + len, "commands:\ton, off\n");
1106 } else {
1107 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1108 return -EIO;
1109 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1110 len += sprintf(p + len, "commands:\ton, off\n");
1111 }
1112
1113 return len;
1114 }
1115
1116 static int light_write(char *buf)
1117 {
1118 int cmos_cmd, lght_cmd;
1119 char *cmd;
1120 int success;
1121
1122 if (!tp_features.light)
1123 return -ENODEV;
1124
1125 while ((cmd = next_cmd(&buf))) {
1126 if (strlencmp(cmd, "on") == 0) {
1127 cmos_cmd = 0x0c;
1128 lght_cmd = 1;
1129 } else if (strlencmp(cmd, "off") == 0) {
1130 cmos_cmd = 0x0d;
1131 lght_cmd = 0;
1132 } else
1133 return -EINVAL;
1134
1135 success = cmos_handle ?
1136 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1137 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1138 if (!success)
1139 return -EIO;
1140 }
1141
1142 return 0;
1143 }
1144
1145 static struct ibm_struct light_driver_data = {
1146 .name = "light",
1147 .read = light_read,
1148 .write = light_write,
1149 };
1150
1151 /*************************************************************************
1152 * Dock subdriver
1153 */
1154
1155 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1156
1157 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1158 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1159 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1160 "\\_SB.PCI.ISA.SLCE", /* 570 */
1161 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1162
1163 /* don't list other alternatives as we install a notify handler on the 570 */
1164 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1165
1166 #define dock_docked() (_sta(dock_handle) & 1)
1167
1168 static int __init dock_init(struct ibm_init_struct *iibm)
1169 {
1170 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1171
1172 IBM_ACPIHANDLE_INIT(dock);
1173 IBM_ACPIHANDLE_INIT(pci);
1174
1175 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1176 str_supported(dock_handle != NULL));
1177
1178 return (dock_handle)? 0 : 1;
1179 }
1180
1181 static void dock_notify(struct ibm_struct *ibm, u32 event)
1182 {
1183 int docked = dock_docked();
1184 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1185
1186 if (event == 1 && !pci) /* 570 */
1187 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1188 else if (event == 1 && pci) /* 570 */
1189 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1190 else if (event == 3 && docked)
1191 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1192 else if (event == 3 && !docked)
1193 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
1194 else if (event == 0 && docked)
1195 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1196 else {
1197 printk(IBM_ERR "unknown dock event %d, status %d\n",
1198 event, _sta(dock_handle));
1199 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
1200 }
1201 }
1202
1203 static int dock_read(char *p)
1204 {
1205 int len = 0;
1206 int docked = dock_docked();
1207
1208 if (!dock_handle)
1209 len += sprintf(p + len, "status:\t\tnot supported\n");
1210 else if (!docked)
1211 len += sprintf(p + len, "status:\t\tundocked\n");
1212 else {
1213 len += sprintf(p + len, "status:\t\tdocked\n");
1214 len += sprintf(p + len, "commands:\tdock, undock\n");
1215 }
1216
1217 return len;
1218 }
1219
1220 static int dock_write(char *buf)
1221 {
1222 char *cmd;
1223
1224 if (!dock_docked())
1225 return -ENODEV;
1226
1227 while ((cmd = next_cmd(&buf))) {
1228 if (strlencmp(cmd, "undock") == 0) {
1229 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1230 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1231 return -EIO;
1232 } else if (strlencmp(cmd, "dock") == 0) {
1233 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1234 return -EIO;
1235 } else
1236 return -EINVAL;
1237 }
1238
1239 return 0;
1240 }
1241
1242 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1243 {
1244 .notify = dock_notify,
1245 .handle = &dock_handle,
1246 .type = ACPI_SYSTEM_NOTIFY,
1247 },
1248 {
1249 .hid = IBM_PCI_HID,
1250 .notify = dock_notify,
1251 .handle = &pci_handle,
1252 .type = ACPI_SYSTEM_NOTIFY,
1253 },
1254 };
1255
1256 static struct ibm_struct dock_driver_data[2] = {
1257 {
1258 .name = "dock",
1259 .read = dock_read,
1260 .write = dock_write,
1261 .acpi = &ibm_dock_acpidriver[0],
1262 },
1263 {
1264 .name = "dock",
1265 .acpi = &ibm_dock_acpidriver[1],
1266 },
1267 };
1268
1269 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1270
1271 /*************************************************************************
1272 * Bay subdriver
1273 */
1274
1275 #ifdef CONFIG_THINKPAD_ACPI_BAY
1276 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1277 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1278 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1279 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1280 ); /* A21e, R30, R31 */
1281 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1282 "_EJ0", /* all others */
1283 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1284 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1285 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1286 ); /* all others */
1287 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1288 "_EJ0", /* 770x */
1289 ); /* all others */
1290
1291 static int __init bay_init(struct ibm_init_struct *iibm)
1292 {
1293 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1294
1295 IBM_ACPIHANDLE_INIT(bay);
1296 if (bay_handle)
1297 IBM_ACPIHANDLE_INIT(bay_ej);
1298 IBM_ACPIHANDLE_INIT(bay2);
1299 if (bay2_handle)
1300 IBM_ACPIHANDLE_INIT(bay2_ej);
1301
1302 tp_features.bay_status = bay_handle &&
1303 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1304 tp_features.bay_status2 = bay2_handle &&
1305 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1306
1307 tp_features.bay_eject = bay_handle && bay_ej_handle &&
1308 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1309 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1310 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1311
1312 vdbg_printk(TPACPI_DBG_INIT,
1313 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1314 str_supported(tp_features.bay_status),
1315 str_supported(tp_features.bay_eject),
1316 str_supported(tp_features.bay_status2),
1317 str_supported(tp_features.bay_eject2));
1318
1319 return (tp_features.bay_status || tp_features.bay_eject ||
1320 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1321 }
1322
1323 static void bay_notify(struct ibm_struct *ibm, u32 event)
1324 {
1325 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1326 }
1327
1328 #define bay_occupied(b) (_sta(b##_handle) & 1)
1329
1330 static int bay_read(char *p)
1331 {
1332 int len = 0;
1333 int occupied = bay_occupied(bay);
1334 int occupied2 = bay_occupied(bay2);
1335 int eject, eject2;
1336
1337 len += sprintf(p + len, "status:\t\t%s\n",
1338 tp_features.bay_status ?
1339 (occupied ? "occupied" : "unoccupied") :
1340 "not supported");
1341 if (tp_features.bay_status2)
1342 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1343 "occupied" : "unoccupied");
1344
1345 eject = tp_features.bay_eject && occupied;
1346 eject2 = tp_features.bay_eject2 && occupied2;
1347
1348 if (eject && eject2)
1349 len += sprintf(p + len, "commands:\teject, eject2\n");
1350 else if (eject)
1351 len += sprintf(p + len, "commands:\teject\n");
1352 else if (eject2)
1353 len += sprintf(p + len, "commands:\teject2\n");
1354
1355 return len;
1356 }
1357
1358 static int bay_write(char *buf)
1359 {
1360 char *cmd;
1361
1362 if (!tp_features.bay_eject && !tp_features.bay_eject2)
1363 return -ENODEV;
1364
1365 while ((cmd = next_cmd(&buf))) {
1366 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1367 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1368 return -EIO;
1369 } else if (tp_features.bay_eject2 &&
1370 strlencmp(cmd, "eject2") == 0) {
1371 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1372 return -EIO;
1373 } else
1374 return -EINVAL;
1375 }
1376
1377 return 0;
1378 }
1379
1380 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
1381 .notify = bay_notify,
1382 .handle = &bay_handle,
1383 .type = ACPI_SYSTEM_NOTIFY,
1384 };
1385
1386 static struct ibm_struct bay_driver_data = {
1387 .name = "bay",
1388 .read = bay_read,
1389 .write = bay_write,
1390 .acpi = &ibm_bay_acpidriver,
1391 };
1392
1393 #endif /* CONFIG_THINKPAD_ACPI_BAY */
1394
1395 /*************************************************************************
1396 * CMOS subdriver
1397 */
1398
1399 static int __init cmos_init(struct ibm_init_struct *iibm)
1400 {
1401 vdbg_printk(TPACPI_DBG_INIT,
1402 "initializing cmos commands subdriver\n");
1403
1404 IBM_ACPIHANDLE_INIT(cmos);
1405
1406 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1407 str_supported(cmos_handle != NULL));
1408 return (cmos_handle)? 0 : 1;
1409 }
1410
1411 static int cmos_eval(int cmos_cmd)
1412 {
1413 if (cmos_handle)
1414 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1415 else
1416 return 1;
1417 }
1418
1419 static int cmos_read(char *p)
1420 {
1421 int len = 0;
1422
1423 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1424 R30, R31, T20-22, X20-21 */
1425 if (!cmos_handle)
1426 len += sprintf(p + len, "status:\t\tnot supported\n");
1427 else {
1428 len += sprintf(p + len, "status:\t\tsupported\n");
1429 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1430 }
1431
1432 return len;
1433 }
1434
1435 static int cmos_write(char *buf)
1436 {
1437 char *cmd;
1438 int cmos_cmd;
1439
1440 if (!cmos_handle)
1441 return -EINVAL;
1442
1443 while ((cmd = next_cmd(&buf))) {
1444 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1445 cmos_cmd >= 0 && cmos_cmd <= 21) {
1446 /* cmos_cmd set */
1447 } else
1448 return -EINVAL;
1449
1450 if (!cmos_eval(cmos_cmd))
1451 return -EIO;
1452 }
1453
1454 return 0;
1455 }
1456
1457 static struct ibm_struct cmos_driver_data = {
1458 .name = "cmos",
1459 .read = cmos_read,
1460 .write = cmos_write,
1461 };
1462
1463 /*************************************************************************
1464 * LED subdriver
1465 */
1466
1467 static enum led_access_mode led_supported;
1468
1469 IBM_HANDLE(led, ec, "SLED", /* 570 */
1470 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1471 "LED", /* all others */
1472 ); /* R30, R31 */
1473
1474 static int __init led_init(struct ibm_init_struct *iibm)
1475 {
1476 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
1477
1478 IBM_ACPIHANDLE_INIT(led);
1479
1480 if (!led_handle)
1481 /* led not supported on R30, R31 */
1482 led_supported = TPACPI_LED_NONE;
1483 else if (strlencmp(led_path, "SLED") == 0)
1484 /* 570 */
1485 led_supported = TPACPI_LED_570;
1486 else if (strlencmp(led_path, "SYSL") == 0)
1487 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1488 led_supported = TPACPI_LED_OLD;
1489 else
1490 /* all others */
1491 led_supported = TPACPI_LED_NEW;
1492
1493 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
1494 str_supported(led_supported), led_supported);
1495
1496 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
1497 }
1498
1499 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1500
1501 static int led_read(char *p)
1502 {
1503 int len = 0;
1504
1505 if (!led_supported) {
1506 len += sprintf(p + len, "status:\t\tnot supported\n");
1507 return len;
1508 }
1509 len += sprintf(p + len, "status:\t\tsupported\n");
1510
1511 if (led_supported == TPACPI_LED_570) {
1512 /* 570 */
1513 int i, status;
1514 for (i = 0; i < 8; i++) {
1515 if (!acpi_evalf(ec_handle,
1516 &status, "GLED", "dd", 1 << i))
1517 return -EIO;
1518 len += sprintf(p + len, "%d:\t\t%s\n",
1519 i, led_status(status));
1520 }
1521 }
1522
1523 len += sprintf(p + len, "commands:\t"
1524 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1525
1526 return len;
1527 }
1528
1529 /* off, on, blink */
1530 static const int led_sled_arg1[] = { 0, 1, 3 };
1531 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1532 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1533 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1534
1535 static int led_write(char *buf)
1536 {
1537 char *cmd;
1538 int led, ind, ret;
1539
1540 if (!led_supported)
1541 return -ENODEV;
1542
1543 while ((cmd = next_cmd(&buf))) {
1544 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1545 return -EINVAL;
1546
1547 if (strstr(cmd, "off")) {
1548 ind = 0;
1549 } else if (strstr(cmd, "on")) {
1550 ind = 1;
1551 } else if (strstr(cmd, "blink")) {
1552 ind = 2;
1553 } else
1554 return -EINVAL;
1555
1556 if (led_supported == TPACPI_LED_570) {
1557 /* 570 */
1558 led = 1 << led;
1559 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1560 led, led_sled_arg1[ind]))
1561 return -EIO;
1562 } else if (led_supported == TPACPI_LED_OLD) {
1563 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1564 led = 1 << led;
1565 ret = ec_write(TPACPI_LED_EC_HLMS, led);
1566 if (ret >= 0)
1567 ret =
1568 ec_write(TPACPI_LED_EC_HLBL,
1569 led * led_exp_hlbl[ind]);
1570 if (ret >= 0)
1571 ret =
1572 ec_write(TPACPI_LED_EC_HLCL,
1573 led * led_exp_hlcl[ind]);
1574 if (ret < 0)
1575 return ret;
1576 } else {
1577 /* all others */
1578 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1579 led, led_led_arg1[ind]))
1580 return -EIO;
1581 }
1582 }
1583
1584 return 0;
1585 }
1586
1587 static struct ibm_struct led_driver_data = {
1588 .name = "led",
1589 .read = led_read,
1590 .write = led_write,
1591 };
1592
1593 /*************************************************************************
1594 * Beep subdriver
1595 */
1596
1597 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
1598
1599 static int __init beep_init(struct ibm_init_struct *iibm)
1600 {
1601 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
1602
1603 IBM_ACPIHANDLE_INIT(beep);
1604
1605 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
1606 str_supported(beep_handle != NULL));
1607
1608 return (beep_handle)? 0 : 1;
1609 }
1610
1611 static int beep_read(char *p)
1612 {
1613 int len = 0;
1614
1615 if (!beep_handle)
1616 len += sprintf(p + len, "status:\t\tnot supported\n");
1617 else {
1618 len += sprintf(p + len, "status:\t\tsupported\n");
1619 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1620 }
1621
1622 return len;
1623 }
1624
1625 static int beep_write(char *buf)
1626 {
1627 char *cmd;
1628 int beep_cmd;
1629
1630 if (!beep_handle)
1631 return -ENODEV;
1632
1633 while ((cmd = next_cmd(&buf))) {
1634 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1635 beep_cmd >= 0 && beep_cmd <= 17) {
1636 /* beep_cmd set */
1637 } else
1638 return -EINVAL;
1639 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1640 return -EIO;
1641 }
1642
1643 return 0;
1644 }
1645
1646 static struct ibm_struct beep_driver_data = {
1647 .name = "beep",
1648 .read = beep_read,
1649 .write = beep_write,
1650 };
1651
1652 /*************************************************************************
1653 * Thermal subdriver
1654 */
1655
1656 static enum thermal_access_mode thermal_read_mode;
1657
1658 static int __init thermal_init(struct ibm_init_struct *iibm)
1659 {
1660 u8 t, ta1, ta2;
1661 int i;
1662 int acpi_tmp7;
1663
1664 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
1665
1666 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1667
1668 if (ibm_thinkpad_ec_found && experimental) {
1669 /*
1670 * Direct EC access mode: sensors at registers
1671 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1672 * non-implemented, thermal sensors return 0x80 when
1673 * not available
1674 */
1675
1676 ta1 = ta2 = 0;
1677 for (i = 0; i < 8; i++) {
1678 if (likely(acpi_ec_read(0x78 + i, &t))) {
1679 ta1 |= t;
1680 } else {
1681 ta1 = 0;
1682 break;
1683 }
1684 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1685 ta2 |= t;
1686 } else {
1687 ta1 = 0;
1688 break;
1689 }
1690 }
1691 if (ta1 == 0) {
1692 /* This is sheer paranoia, but we handle it anyway */
1693 if (acpi_tmp7) {
1694 printk(IBM_ERR
1695 "ThinkPad ACPI EC access misbehaving, "
1696 "falling back to ACPI TMPx access mode\n");
1697 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1698 } else {
1699 printk(IBM_ERR
1700 "ThinkPad ACPI EC access misbehaving, "
1701 "disabling thermal sensors access\n");
1702 thermal_read_mode = TPACPI_THERMAL_NONE;
1703 }
1704 } else {
1705 thermal_read_mode =
1706 (ta2 != 0) ?
1707 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
1708 }
1709 } else if (acpi_tmp7) {
1710 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1711 /* 600e/x, 770e, 770x */
1712 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
1713 } else {
1714 /* Standard ACPI TMPx access, max 8 sensors */
1715 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1716 }
1717 } else {
1718 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1719 thermal_read_mode = TPACPI_THERMAL_NONE;
1720 }
1721
1722 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
1723 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
1724 thermal_read_mode);
1725
1726 return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
1727 }
1728
1729 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1730 {
1731 int i, t;
1732 s8 tmp;
1733 char tmpi[] = "TMPi";
1734
1735 if (!s)
1736 return -EINVAL;
1737
1738 switch (thermal_read_mode) {
1739 #if TPACPI_MAX_THERMAL_SENSORS >= 16
1740 case TPACPI_THERMAL_TPEC_16:
1741 for (i = 0; i < 8; i++) {
1742 if (!acpi_ec_read(0xC0 + i, &tmp))
1743 return -EIO;
1744 s->temp[i + 8] = tmp * 1000;
1745 }
1746 /* fallthrough */
1747 #endif
1748 case TPACPI_THERMAL_TPEC_8:
1749 for (i = 0; i < 8; i++) {
1750 if (!acpi_ec_read(0x78 + i, &tmp))
1751 return -EIO;
1752 s->temp[i] = tmp * 1000;
1753 }
1754 return (thermal_read_mode == TPACPI_THERMAL_TPEC_16) ? 16 : 8;
1755
1756 case TPACPI_THERMAL_ACPI_UPDT:
1757 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1758 return -EIO;
1759 for (i = 0; i < 8; i++) {
1760 tmpi[3] = '0' + i;
1761 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1762 return -EIO;
1763 s->temp[i] = (t - 2732) * 100;
1764 }
1765 return 8;
1766
1767 case TPACPI_THERMAL_ACPI_TMP07:
1768 for (i = 0; i < 8; i++) {
1769 tmpi[3] = '0' + i;
1770 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1771 return -EIO;
1772 s->temp[i] = t * 1000;
1773 }
1774 return 8;
1775
1776 case TPACPI_THERMAL_NONE:
1777 default:
1778 return 0;
1779 }
1780 }
1781
1782 static int thermal_read(char *p)
1783 {
1784 int len = 0;
1785 int n, i;
1786 struct ibm_thermal_sensors_struct t;
1787
1788 n = thermal_get_sensors(&t);
1789 if (unlikely(n < 0))
1790 return n;
1791
1792 len += sprintf(p + len, "temperatures:\t");
1793
1794 if (n > 0) {
1795 for (i = 0; i < (n - 1); i++)
1796 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1797 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1798 } else
1799 len += sprintf(p + len, "not supported\n");
1800
1801 return len;
1802 }
1803
1804 static struct ibm_struct thermal_driver_data = {
1805 .name = "thermal",
1806 .read = thermal_read,
1807 };
1808
1809 /*************************************************************************
1810 * EC Dump subdriver
1811 */
1812
1813 static u8 ecdump_regs[256];
1814
1815 static int ecdump_read(char *p)
1816 {
1817 int len = 0;
1818 int i, j;
1819 u8 v;
1820
1821 len += sprintf(p + len, "EC "
1822 " +00 +01 +02 +03 +04 +05 +06 +07"
1823 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1824 for (i = 0; i < 256; i += 16) {
1825 len += sprintf(p + len, "EC 0x%02x:", i);
1826 for (j = 0; j < 16; j++) {
1827 if (!acpi_ec_read(i + j, &v))
1828 break;
1829 if (v != ecdump_regs[i + j])
1830 len += sprintf(p + len, " *%02x", v);
1831 else
1832 len += sprintf(p + len, " %02x", v);
1833 ecdump_regs[i + j] = v;
1834 }
1835 len += sprintf(p + len, "\n");
1836 if (j != 16)
1837 break;
1838 }
1839
1840 /* These are way too dangerous to advertise openly... */
1841 #if 0
1842 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1843 " (<offset> is 00-ff, <value> is 00-ff)\n");
1844 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1845 " (<offset> is 00-ff, <value> is 0-255)\n");
1846 #endif
1847 return len;
1848 }
1849
1850 static int ecdump_write(char *buf)
1851 {
1852 char *cmd;
1853 int i, v;
1854
1855 while ((cmd = next_cmd(&buf))) {
1856 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1857 /* i and v set */
1858 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1859 /* i and v set */
1860 } else
1861 return -EINVAL;
1862 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1863 if (!acpi_ec_write(i, v))
1864 return -EIO;
1865 } else
1866 return -EINVAL;
1867 }
1868
1869 return 0;
1870 }
1871
1872 static struct ibm_struct ecdump_driver_data = {
1873 .name = "ecdump",
1874 .read = ecdump_read,
1875 .write = ecdump_write,
1876 .flags.experimental = 1,
1877 };
1878
1879 /*************************************************************************
1880 * Backlight/brightness subdriver
1881 */
1882
1883 static struct backlight_device *ibm_backlight_device = NULL;
1884
1885 static struct backlight_ops ibm_backlight_data = {
1886 .get_brightness = brightness_get,
1887 .update_status = brightness_update_status,
1888 };
1889
1890 static int __init brightness_init(struct ibm_init_struct *iibm)
1891 {
1892 int b;
1893
1894 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
1895
1896 b = brightness_get(NULL);
1897 if (b < 0)
1898 return b;
1899
1900 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1901 &ibm_backlight_data);
1902 if (IS_ERR(ibm_backlight_device)) {
1903 printk(IBM_ERR "Could not register backlight device\n");
1904 return PTR_ERR(ibm_backlight_device);
1905 }
1906 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
1907
1908 ibm_backlight_device->props.max_brightness = 7;
1909 ibm_backlight_device->props.brightness = b;
1910 backlight_update_status(ibm_backlight_device);
1911
1912 return 0;
1913 }
1914
1915 static void brightness_exit(void)
1916 {
1917 if (ibm_backlight_device) {
1918 vdbg_printk(TPACPI_DBG_EXIT,
1919 "calling backlight_device_unregister()\n");
1920 backlight_device_unregister(ibm_backlight_device);
1921 ibm_backlight_device = NULL;
1922 }
1923 }
1924
1925 static int brightness_update_status(struct backlight_device *bd)
1926 {
1927 return brightness_set(
1928 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
1929 bd->props.power == FB_BLANK_UNBLANK) ?
1930 bd->props.brightness : 0);
1931 }
1932
1933 static int brightness_get(struct backlight_device *bd)
1934 {
1935 u8 level;
1936 if (!acpi_ec_read(brightness_offset, &level))
1937 return -EIO;
1938
1939 level &= 0x7;
1940
1941 return level;
1942 }
1943
1944 static int brightness_set(int value)
1945 {
1946 int cmos_cmd, inc, i;
1947 int current_value = brightness_get(NULL);
1948
1949 value &= 7;
1950
1951 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
1952 inc = value > current_value ? 1 : -1;
1953 for (i = current_value; i != value; i += inc) {
1954 if (!cmos_eval(cmos_cmd))
1955 return -EIO;
1956 if (!acpi_ec_write(brightness_offset, i + inc))
1957 return -EIO;
1958 }
1959
1960 return 0;
1961 }
1962
1963 static int brightness_read(char *p)
1964 {
1965 int len = 0;
1966 int level;
1967
1968 if ((level = brightness_get(NULL)) < 0) {
1969 len += sprintf(p + len, "level:\t\tunreadable\n");
1970 } else {
1971 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1972 len += sprintf(p + len, "commands:\tup, down\n");
1973 len += sprintf(p + len, "commands:\tlevel <level>"
1974 " (<level> is 0-7)\n");
1975 }
1976
1977 return len;
1978 }
1979
1980 static int brightness_write(char *buf)
1981 {
1982 int level;
1983 int new_level;
1984 char *cmd;
1985
1986 while ((cmd = next_cmd(&buf))) {
1987 if ((level = brightness_get(NULL)) < 0)
1988 return level;
1989 level &= 7;
1990
1991 if (strlencmp(cmd, "up") == 0) {
1992 new_level = level == 7 ? 7 : level + 1;
1993 } else if (strlencmp(cmd, "down") == 0) {
1994 new_level = level == 0 ? 0 : level - 1;
1995 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1996 new_level >= 0 && new_level <= 7) {
1997 /* new_level set */
1998 } else
1999 return -EINVAL;
2000
2001 brightness_set(new_level);
2002 }
2003
2004 return 0;
2005 }
2006
2007 static struct ibm_struct brightness_driver_data = {
2008 .name = "brightness",
2009 .read = brightness_read,
2010 .write = brightness_write,
2011 .exit = brightness_exit,
2012 };
2013
2014 /*************************************************************************
2015 * Volume subdriver
2016 */
2017
2018 static int volume_read(char *p)
2019 {
2020 int len = 0;
2021 u8 level;
2022
2023 if (!acpi_ec_read(volume_offset, &level)) {
2024 len += sprintf(p + len, "level:\t\tunreadable\n");
2025 } else {
2026 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2027 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2028 len += sprintf(p + len, "commands:\tup, down, mute\n");
2029 len += sprintf(p + len, "commands:\tlevel <level>"
2030 " (<level> is 0-15)\n");
2031 }
2032
2033 return len;
2034 }
2035
2036 static int volume_write(char *buf)
2037 {
2038 int cmos_cmd, inc, i;
2039 u8 level, mute;
2040 int new_level, new_mute;
2041 char *cmd;
2042
2043 while ((cmd = next_cmd(&buf))) {
2044 if (!acpi_ec_read(volume_offset, &level))
2045 return -EIO;
2046 new_mute = mute = level & 0x40;
2047 new_level = level = level & 0xf;
2048
2049 if (strlencmp(cmd, "up") == 0) {
2050 if (mute)
2051 new_mute = 0;
2052 else
2053 new_level = level == 15 ? 15 : level + 1;
2054 } else if (strlencmp(cmd, "down") == 0) {
2055 if (mute)
2056 new_mute = 0;
2057 else
2058 new_level = level == 0 ? 0 : level - 1;
2059 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2060 new_level >= 0 && new_level <= 15) {
2061 /* new_level set */
2062 } else if (strlencmp(cmd, "mute") == 0) {
2063 new_mute = 0x40;
2064 } else
2065 return -EINVAL;
2066
2067 if (new_level != level) { /* mute doesn't change */
2068 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2069 inc = new_level > level ? 1 : -1;
2070
2071 if (mute && (!cmos_eval(cmos_cmd) ||
2072 !acpi_ec_write(volume_offset, level)))
2073 return -EIO;
2074
2075 for (i = level; i != new_level; i += inc)
2076 if (!cmos_eval(cmos_cmd) ||
2077 !acpi_ec_write(volume_offset, i + inc))
2078 return -EIO;
2079
2080 if (mute && (!cmos_eval(TP_CMOS_VOLUME_MUTE) ||
2081 !acpi_ec_write(volume_offset,
2082 new_level + mute)))
2083 return -EIO;
2084 }
2085
2086 if (new_mute != mute) { /* level doesn't change */
2087 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2088
2089 if (!cmos_eval(cmos_cmd) ||
2090 !acpi_ec_write(volume_offset, level + new_mute))
2091 return -EIO;
2092 }
2093 }
2094
2095 return 0;
2096 }
2097
2098 static struct ibm_struct volume_driver_data = {
2099 .name = "volume",
2100 .read = volume_read,
2101 .write = volume_write,
2102 };
2103
2104 /*************************************************************************
2105 * Fan subdriver
2106 */
2107
2108 /*
2109 * FAN ACCESS MODES
2110 *
2111 * TPACPI_FAN_RD_ACPI_GFAN:
2112 * ACPI GFAN method: returns fan level
2113 *
2114 * see TPACPI_FAN_WR_ACPI_SFAN
2115 * EC 0x2f (HFSP) not available if GFAN exists
2116 *
2117 * TPACPI_FAN_WR_ACPI_SFAN:
2118 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2119 *
2120 * EC 0x2f (HFSP) might be available *for reading*, but do not use
2121 * it for writing.
2122 *
2123 * TPACPI_FAN_WR_TPEC:
2124 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
2125 * Supported on almost all ThinkPads
2126 *
2127 * Fan speed changes of any sort (including those caused by the
2128 * disengaged mode) are usually done slowly by the firmware as the
2129 * maximum ammount of fan duty cycle change per second seems to be
2130 * limited.
2131 *
2132 * Reading is not available if GFAN exists.
2133 * Writing is not available if SFAN exists.
2134 *
2135 * Bits
2136 * 7 automatic mode engaged;
2137 * (default operation mode of the ThinkPad)
2138 * fan level is ignored in this mode.
2139 * 6 full speed mode (takes precedence over bit 7);
2140 * not available on all thinkpads. May disable
2141 * the tachometer while the fan controller ramps up
2142 * the speed (which can take up to a few *minutes*).
2143 * Speeds up fan to 100% duty-cycle, which is far above
2144 * the standard RPM levels. It is not impossible that
2145 * it could cause hardware damage.
2146 * 5-3 unused in some models. Extra bits for fan level
2147 * in others, but still useless as all values above
2148 * 7 map to the same speed as level 7 in these models.
2149 * 2-0 fan level (0..7 usually)
2150 * 0x00 = stop
2151 * 0x07 = max (set when temperatures critical)
2152 * Some ThinkPads may have other levels, see
2153 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2154 *
2155 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2156 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2157 * does so, its initial value is meaningless (0x07).
2158 *
2159 * For firmware bugs, refer to:
2160 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2161 *
2162 * ----
2163 *
2164 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2165 * Main fan tachometer reading (in RPM)
2166 *
2167 * This register is present on all ThinkPads with a new-style EC, and
2168 * it is known not to be present on the A21m/e, and T22, as there is
2169 * something else in offset 0x84 according to the ACPI DSDT. Other
2170 * ThinkPads from this same time period (and earlier) probably lack the
2171 * tachometer as well.
2172 *
2173 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2174 * was never fixed by IBM to report the EC firmware version string
2175 * probably support the tachometer (like the early X models), so
2176 * detecting it is quite hard. We need more data to know for sure.
2177 *
2178 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2179 * might result.
2180 *
2181 * FIRMWARE BUG: may go stale while the EC is switching to full speed
2182 * mode.
2183 *
2184 * For firmware bugs, refer to:
2185 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2186 *
2187 * TPACPI_FAN_WR_ACPI_FANS:
2188 * ThinkPad X31, X40, X41. Not available in the X60.
2189 *
2190 * FANS ACPI handle: takes three arguments: low speed, medium speed,
2191 * high speed. ACPI DSDT seems to map these three speeds to levels
2192 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2193 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2194 *
2195 * The speeds are stored on handles
2196 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2197 *
2198 * There are three default speed sets, acessible as handles:
2199 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2200 *
2201 * ACPI DSDT switches which set is in use depending on various
2202 * factors.
2203 *
2204 * TPACPI_FAN_WR_TPEC is also available and should be used to
2205 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
2206 * but the ACPI tables just mention level 7.
2207 */
2208
2209 static enum fan_status_access_mode fan_status_access_mode;
2210 static enum fan_control_access_mode fan_control_access_mode;
2211 static enum fan_control_commands fan_control_commands;
2212
2213 static u8 fan_control_initial_status;
2214
2215 static void fan_watchdog_fire(struct work_struct *ignored);
2216 static int fan_watchdog_maxinterval;
2217 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
2218
2219 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
2220 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
2221 "\\FSPD", /* 600e/x, 770e, 770x */
2222 ); /* all others */
2223 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
2224 "JFNS", /* 770x-JL */
2225 ); /* all others */
2226
2227 static int __init fan_init(struct ibm_init_struct *iibm)
2228 {
2229 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
2230
2231 fan_status_access_mode = TPACPI_FAN_NONE;
2232 fan_control_access_mode = TPACPI_FAN_WR_NONE;
2233 fan_control_commands = 0;
2234 fan_watchdog_maxinterval = 0;
2235 tp_features.fan_ctrl_status_undef = 0;
2236
2237 IBM_ACPIHANDLE_INIT(fans);
2238 IBM_ACPIHANDLE_INIT(gfan);
2239 IBM_ACPIHANDLE_INIT(sfan);
2240
2241 if (gfan_handle) {
2242 /* 570, 600e/x, 770e, 770x */
2243 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
2244 } else {
2245 /* all other ThinkPads: note that even old-style
2246 * ThinkPad ECs supports the fan control register */
2247 if (likely(acpi_ec_read(fan_status_offset,
2248 &fan_control_initial_status))) {
2249 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
2250
2251 /* In some ThinkPads, neither the EC nor the ACPI
2252 * DSDT initialize the fan status, and it ends up
2253 * being set to 0x07 when it *could* be either
2254 * 0x07 or 0x80.
2255 *
2256 * Enable for TP-1Y (T43), TP-78 (R51e),
2257 * TP-76 (R52), TP-70 (T43, R52), which are known
2258 * to be buggy. */
2259 if (fan_control_initial_status == 0x07 &&
2260 ibm_thinkpad_ec_found &&
2261 ((ibm_thinkpad_ec_found[0] == '1' &&
2262 ibm_thinkpad_ec_found[1] == 'Y') ||
2263 (ibm_thinkpad_ec_found[0] == '7' &&
2264 (ibm_thinkpad_ec_found[1] == '6' ||
2265 ibm_thinkpad_ec_found[1] == '8' ||
2266 ibm_thinkpad_ec_found[1] == '0'))
2267 )) {
2268 printk(IBM_NOTICE
2269 "fan_init: initial fan status is "
2270 "unknown, assuming it is in auto "
2271 "mode\n");
2272 tp_features.fan_ctrl_status_undef = 1;
2273 }
2274 } else {
2275 printk(IBM_ERR
2276 "ThinkPad ACPI EC access misbehaving, "
2277 "fan status and control unavailable\n");
2278 return 1;
2279 }
2280 }
2281
2282 if (sfan_handle) {
2283 /* 570, 770x-JL */
2284 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
2285 fan_control_commands |=
2286 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
2287 } else {
2288 if (!gfan_handle) {
2289 /* gfan without sfan means no fan control */
2290 /* all other models implement TP EC 0x2f control */
2291
2292 if (fans_handle) {
2293 /* X31, X40, X41 */
2294 fan_control_access_mode =
2295 TPACPI_FAN_WR_ACPI_FANS;
2296 fan_control_commands |=
2297 TPACPI_FAN_CMD_SPEED |
2298 TPACPI_FAN_CMD_LEVEL |
2299 TPACPI_FAN_CMD_ENABLE;
2300 } else {
2301 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
2302 fan_control_commands |=
2303 TPACPI_FAN_CMD_LEVEL |
2304 TPACPI_FAN_CMD_ENABLE;
2305 }
2306 }
2307 }
2308
2309 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
2310 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
2311 fan_control_access_mode != TPACPI_FAN_WR_NONE),
2312 fan_status_access_mode, fan_control_access_mode);
2313
2314 return (fan_status_access_mode != TPACPI_FAN_NONE ||
2315 fan_control_access_mode != TPACPI_FAN_WR_NONE)?
2316 0 : 1;
2317 }
2318
2319 static int fan_get_status(u8 *status)
2320 {
2321 u8 s;
2322
2323 /* TODO:
2324 * Add TPACPI_FAN_RD_ACPI_FANS ? */
2325
2326 switch (fan_status_access_mode) {
2327 case TPACPI_FAN_RD_ACPI_GFAN:
2328 /* 570, 600e/x, 770e, 770x */
2329
2330 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
2331 return -EIO;
2332
2333 if (likely(status))
2334 *status = s & 0x07;
2335
2336 break;
2337
2338 case TPACPI_FAN_RD_TPEC:
2339 /* all except 570, 600e/x, 770e, 770x */
2340 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
2341 return -EIO;
2342
2343 if (likely(status))
2344 *status = s;
2345
2346 break;
2347
2348 default:
2349 return -ENXIO;
2350 }
2351
2352 return 0;
2353 }
2354
2355 static void fan_exit(void)
2356 {
2357 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending watchdogs\n");
2358 cancel_delayed_work(&fan_watchdog_task);
2359 flush_scheduled_work();
2360 }
2361
2362 static int fan_get_speed(unsigned int *speed)
2363 {
2364 u8 hi, lo;
2365
2366 switch (fan_status_access_mode) {
2367 case TPACPI_FAN_RD_TPEC:
2368 /* all except 570, 600e/x, 770e, 770x */
2369 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
2370 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
2371 return -EIO;
2372
2373 if (likely(speed))
2374 *speed = (hi << 8) | lo;
2375
2376 break;
2377
2378 default:
2379 return -ENXIO;
2380 }
2381
2382 return 0;
2383 }
2384
2385 static void fan_watchdog_fire(struct work_struct *ignored)
2386 {
2387 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2388 if (fan_set_enable()) {
2389 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2390 /* reschedule for later */
2391 fan_watchdog_reset();
2392 }
2393 }
2394
2395 static void fan_watchdog_reset(void)
2396 {
2397 static int fan_watchdog_active = 0;
2398
2399 if (fan_watchdog_active)
2400 cancel_delayed_work(&fan_watchdog_task);
2401
2402 if (fan_watchdog_maxinterval > 0) {
2403 fan_watchdog_active = 1;
2404 if (!schedule_delayed_work(&fan_watchdog_task,
2405 msecs_to_jiffies(fan_watchdog_maxinterval
2406 * 1000))) {
2407 printk(IBM_ERR "failed to schedule the fan watchdog, "
2408 "watchdog will not trigger\n");
2409 }
2410 } else
2411 fan_watchdog_active = 0;
2412 }
2413
2414 static int fan_set_level(int level)
2415 {
2416 switch (fan_control_access_mode) {
2417 case TPACPI_FAN_WR_ACPI_SFAN:
2418 if (level >= 0 && level <= 7) {
2419 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2420 return -EIO;
2421 } else
2422 return -EINVAL;
2423 break;
2424
2425 case TPACPI_FAN_WR_ACPI_FANS:
2426 case TPACPI_FAN_WR_TPEC:
2427 if ((level != TP_EC_FAN_AUTO) &&
2428 (level != TP_EC_FAN_FULLSPEED) &&
2429 ((level < 0) || (level > 7)))
2430 return -EINVAL;
2431
2432 if (!acpi_ec_write(fan_status_offset, level))
2433 return -EIO;
2434 else
2435 tp_features.fan_ctrl_status_undef = 0;
2436 break;
2437
2438 default:
2439 return -ENXIO;
2440 }
2441 return 0;
2442 }
2443
2444 static int fan_set_enable(void)
2445 {
2446 u8 s;
2447 int rc;
2448
2449 switch (fan_control_access_mode) {
2450 case TPACPI_FAN_WR_ACPI_FANS:
2451 case TPACPI_FAN_WR_TPEC:
2452 if ((rc = fan_get_status(&s)) < 0)
2453 return rc;
2454
2455 /* Don't go out of emergency fan mode */
2456 if (s != 7)
2457 s = TP_EC_FAN_AUTO;
2458
2459 if (!acpi_ec_write(fan_status_offset, s))
2460 return -EIO;
2461 else
2462 tp_features.fan_ctrl_status_undef = 0;
2463 break;
2464
2465 case TPACPI_FAN_WR_ACPI_SFAN:
2466 if ((rc = fan_get_status(&s)) < 0)
2467 return rc;
2468
2469 s &= 0x07;
2470
2471 /* Set fan to at least level 4 */
2472 if (s < 4)
2473 s = 4;
2474
2475 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2476 return -EIO;
2477 break;
2478
2479 default:
2480 return -ENXIO;
2481 }
2482 return 0;
2483 }
2484
2485 static int fan_set_disable(void)
2486 {
2487 switch (fan_control_access_mode) {
2488 case TPACPI_FAN_WR_ACPI_FANS:
2489 case TPACPI_FAN_WR_TPEC:
2490 if (!acpi_ec_write(fan_status_offset, 0x00))
2491 return -EIO;
2492 else
2493 tp_features.fan_ctrl_status_undef = 0;
2494 break;
2495
2496 case TPACPI_FAN_WR_ACPI_SFAN:
2497 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2498 return -EIO;
2499 break;
2500
2501 default:
2502 return -ENXIO;
2503 }
2504 return 0;
2505 }
2506
2507 static int fan_set_speed(int speed)
2508 {
2509 switch (fan_control_access_mode) {
2510 case TPACPI_FAN_WR_ACPI_FANS:
2511 if (speed >= 0 && speed <= 65535) {
2512 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2513 speed, speed, speed))
2514 return -EIO;
2515 } else
2516 return -EINVAL;
2517 break;
2518
2519 default:
2520 return -ENXIO;
2521 }
2522 return 0;
2523 }
2524
2525 static int fan_read(char *p)
2526 {
2527 int len = 0;
2528 int rc;
2529 u8 status;
2530 unsigned int speed = 0;
2531
2532 switch (fan_status_access_mode) {
2533 case TPACPI_FAN_RD_ACPI_GFAN:
2534 /* 570, 600e/x, 770e, 770x */
2535 if ((rc = fan_get_status(&status)) < 0)
2536 return rc;
2537
2538 len += sprintf(p + len, "status:\t\t%s\n"
2539 "level:\t\t%d\n",
2540 (status != 0) ? "enabled" : "disabled", status);
2541 break;
2542
2543 case TPACPI_FAN_RD_TPEC:
2544 /* all except 570, 600e/x, 770e, 770x */
2545 if ((rc = fan_get_status(&status)) < 0)
2546 return rc;
2547
2548 if (unlikely(tp_features.fan_ctrl_status_undef)) {
2549 if (status != fan_control_initial_status)
2550 tp_features.fan_ctrl_status_undef = 0;
2551 else
2552 /* Return most likely status. In fact, it
2553 * might be the only possible status */
2554 status = TP_EC_FAN_AUTO;
2555 }
2556
2557 len += sprintf(p + len, "status:\t\t%s\n",
2558 (status != 0) ? "enabled" : "disabled");
2559
2560 if ((rc = fan_get_speed(&speed)) < 0)
2561 return rc;
2562
2563 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2564
2565 if (status & TP_EC_FAN_FULLSPEED)
2566 /* Disengaged mode takes precedence */
2567 len += sprintf(p + len, "level:\t\tdisengaged\n");
2568 else if (status & TP_EC_FAN_AUTO)
2569 len += sprintf(p + len, "level:\t\tauto\n");
2570 else
2571 len += sprintf(p + len, "level:\t\t%d\n", status);
2572 break;
2573
2574 case TPACPI_FAN_NONE:
2575 default:
2576 len += sprintf(p + len, "status:\t\tnot supported\n");
2577 }
2578
2579 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
2580 len += sprintf(p + len, "commands:\tlevel <level>");
2581
2582 switch (fan_control_access_mode) {
2583 case TPACPI_FAN_WR_ACPI_SFAN:
2584 len += sprintf(p + len, " (<level> is 0-7)\n");
2585 break;
2586
2587 default:
2588 len += sprintf(p + len, " (<level> is 0-7, "
2589 "auto, disengaged)\n");
2590 break;
2591 }
2592 }
2593
2594 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
2595 len += sprintf(p + len, "commands:\tenable, disable\n"
2596 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2597 "1-120 (seconds))\n");
2598
2599 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
2600 len += sprintf(p + len, "commands:\tspeed <speed>"
2601 " (<speed> is 0-65535)\n");
2602
2603 return len;
2604 }
2605
2606 static int fan_write_cmd_level(const char *cmd, int *rc)
2607 {
2608 int level;
2609
2610 if (strlencmp(cmd, "level auto") == 0)
2611 level = TP_EC_FAN_AUTO;
2612 else if (strlencmp(cmd, "level disengaged") == 0)
2613 level = TP_EC_FAN_FULLSPEED;
2614 else if (sscanf(cmd, "level %d", &level) != 1)
2615 return 0;
2616
2617 if ((*rc = fan_set_level(level)) == -ENXIO)
2618 printk(IBM_ERR "level command accepted for unsupported "
2619 "access mode %d", fan_control_access_mode);
2620
2621 return 1;
2622 }
2623
2624 static int fan_write_cmd_enable(const char *cmd, int *rc)
2625 {
2626 if (strlencmp(cmd, "enable") != 0)
2627 return 0;
2628
2629 if ((*rc = fan_set_enable()) == -ENXIO)
2630 printk(IBM_ERR "enable command accepted for unsupported "
2631 "access mode %d", fan_control_access_mode);
2632
2633 return 1;
2634 }
2635
2636 static int fan_write_cmd_disable(const char *cmd, int *rc)
2637 {
2638 if (strlencmp(cmd, "disable") != 0)
2639 return 0;
2640
2641 if ((*rc = fan_set_disable()) == -ENXIO)
2642 printk(IBM_ERR "disable command accepted for unsupported "
2643 "access mode %d", fan_control_access_mode);
2644
2645 return 1;
2646 }
2647
2648 static int fan_write_cmd_speed(const char *cmd, int *rc)
2649 {
2650 int speed;
2651
2652 /* TODO:
2653 * Support speed <low> <medium> <high> ? */
2654
2655 if (sscanf(cmd, "speed %d", &speed) != 1)
2656 return 0;
2657
2658 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2659 printk(IBM_ERR "speed command accepted for unsupported "
2660 "access mode %d", fan_control_access_mode);
2661
2662 return 1;
2663 }
2664
2665 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2666 {
2667 int interval;
2668
2669 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2670 return 0;
2671
2672 if (interval < 0 || interval > 120)
2673 *rc = -EINVAL;
2674 else
2675 fan_watchdog_maxinterval = interval;
2676
2677 return 1;
2678 }
2679
2680 static int fan_write(char *buf)
2681 {
2682 char *cmd;
2683 int rc = 0;
2684
2685 while (!rc && (cmd = next_cmd(&buf))) {
2686 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
2687 fan_write_cmd_level(cmd, &rc)) &&
2688 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
2689 (fan_write_cmd_enable(cmd, &rc) ||
2690 fan_write_cmd_disable(cmd, &rc) ||
2691 fan_write_cmd_watchdog(cmd, &rc))) &&
2692 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
2693 fan_write_cmd_speed(cmd, &rc))
2694 )
2695 rc = -EINVAL;
2696 else if (!rc)
2697 fan_watchdog_reset();
2698 }
2699
2700 return rc;
2701 }
2702
2703 static struct ibm_struct fan_driver_data = {
2704 .name = "fan",
2705 .read = fan_read,
2706 .write = fan_write,
2707 .exit = fan_exit,
2708 .flags.experimental = 1,
2709 };
2710
2711 /****************************************************************************
2712 ****************************************************************************
2713 *
2714 * Infrastructure
2715 *
2716 ****************************************************************************
2717 ****************************************************************************/
2718
2719 /* /proc support */
2720 static struct proc_dir_entry *proc_dir = NULL;
2721
2722 /* Subdriver registry */
2723 static LIST_HEAD(tpacpi_all_drivers);
2724
2725
2726 /*
2727 * Module and infrastructure proble, init and exit handling
2728 */
2729
2730 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
2731 static const char * __init str_supported(int is_supported)
2732 {
2733 static char text_unsupported[] __initdata = "not supported";
2734
2735 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
2736 }
2737 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
2738
2739 static int __init ibm_init(struct ibm_init_struct *iibm)
2740 {
2741 int ret;
2742 struct ibm_struct *ibm = iibm->data;
2743 struct proc_dir_entry *entry;
2744
2745 BUG_ON(ibm == NULL);
2746
2747 INIT_LIST_HEAD(&ibm->all_drivers);
2748
2749 if (ibm->flags.experimental && !experimental)
2750 return 0;
2751
2752 dbg_printk(TPACPI_DBG_INIT,
2753 "probing for %s\n", ibm->name);
2754
2755 if (iibm->init) {
2756 ret = iibm->init(iibm);
2757 if (ret > 0)
2758 return 0; /* probe failed */
2759 if (ret)
2760 return ret;
2761
2762 ibm->flags.init_called = 1;
2763 }
2764
2765 if (ibm->acpi) {
2766 if (ibm->acpi->hid) {
2767 ret = register_tpacpi_subdriver(ibm);
2768 if (ret)
2769 goto err_out;
2770 }
2771
2772 if (ibm->acpi->notify) {
2773 ret = setup_acpi_notify(ibm);
2774 if (ret == -ENODEV) {
2775 printk(IBM_NOTICE "disabling subdriver %s\n",
2776 ibm->name);
2777 ret = 0;
2778 goto err_out;
2779 }
2780 if (ret < 0)
2781 goto err_out;
2782 }
2783 }
2784
2785 dbg_printk(TPACPI_DBG_INIT,
2786 "%s installed\n", ibm->name);
2787
2788 if (ibm->read) {
2789 entry = create_proc_entry(ibm->name,
2790 S_IFREG | S_IRUGO | S_IWUSR,
2791 proc_dir);
2792 if (!entry) {
2793 printk(IBM_ERR "unable to create proc entry %s\n",
2794 ibm->name);
2795 ret = -ENODEV;
2796 goto err_out;
2797 }
2798 entry->owner = THIS_MODULE;
2799 entry->data = ibm;
2800 entry->read_proc = &dispatch_procfs_read;
2801 if (ibm->write)
2802 entry->write_proc = &dispatch_procfs_write;
2803 ibm->flags.proc_created = 1;
2804 }
2805
2806 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
2807
2808 return 0;
2809
2810 err_out:
2811 dbg_printk(TPACPI_DBG_INIT,
2812 "%s: at error exit path with result %d\n",
2813 ibm->name, ret);
2814
2815 ibm_exit(ibm);
2816 return (ret < 0)? ret : 0;
2817 }
2818
2819 static void ibm_exit(struct ibm_struct *ibm)
2820 {
2821 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
2822
2823 list_del_init(&ibm->all_drivers);
2824
2825 if (ibm->flags.acpi_notify_installed) {
2826 dbg_printk(TPACPI_DBG_EXIT,
2827 "%s: acpi_remove_notify_handler\n", ibm->name);
2828 BUG_ON(!ibm->acpi);
2829 acpi_remove_notify_handler(*ibm->acpi->handle,
2830 ibm->acpi->type,
2831 dispatch_acpi_notify);
2832 ibm->flags.acpi_notify_installed = 0;
2833 ibm->flags.acpi_notify_installed = 0;
2834 }
2835
2836 if (ibm->flags.proc_created) {
2837 dbg_printk(TPACPI_DBG_EXIT,
2838 "%s: remove_proc_entry\n", ibm->name);
2839 remove_proc_entry(ibm->name, proc_dir);
2840 ibm->flags.proc_created = 0;
2841 }
2842
2843 if (ibm->flags.acpi_driver_registered) {
2844 dbg_printk(TPACPI_DBG_EXIT,
2845 "%s: acpi_bus_unregister_driver\n", ibm->name);
2846 BUG_ON(!ibm->acpi);
2847 acpi_bus_unregister_driver(ibm->acpi->driver);
2848 kfree(ibm->acpi->driver);
2849 ibm->acpi->driver = NULL;
2850 ibm->flags.acpi_driver_registered = 0;
2851 }
2852
2853 if (ibm->flags.init_called && ibm->exit) {
2854 ibm->exit();
2855 ibm->flags.init_called = 0;
2856 }
2857
2858 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
2859 }
2860
2861 /* Probing */
2862
2863 static char *ibm_thinkpad_ec_found = NULL;
2864
2865 static char* __init check_dmi_for_ec(void)
2866 {
2867 struct dmi_device *dev = NULL;
2868 char ec_fw_string[18];
2869
2870 /*
2871 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2872 * X32 or newer, all Z series; Some models must have an
2873 * up-to-date BIOS or they will not be detected.
2874 *
2875 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2876 */
2877 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2878 if (sscanf(dev->name,
2879 "IBM ThinkPad Embedded Controller -[%17c",
2880 ec_fw_string) == 1) {
2881 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2882 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2883 return kstrdup(ec_fw_string, GFP_KERNEL);
2884 }
2885 }
2886 return NULL;
2887 }
2888
2889 static int __init probe_for_thinkpad(void)
2890 {
2891 int is_thinkpad;
2892
2893 if (acpi_disabled)
2894 return -ENODEV;
2895
2896 /*
2897 * Non-ancient models have better DMI tagging, but very old models
2898 * don't.
2899 */
2900 is_thinkpad = dmi_name_in_vendors("ThinkPad");
2901
2902 /* ec is required because many other handles are relative to it */
2903 IBM_ACPIHANDLE_INIT(ec);
2904 if (!ec_handle) {
2905 if (is_thinkpad)
2906 printk(IBM_ERR
2907 "Not yet supported ThinkPad detected!\n");
2908 return -ENODEV;
2909 }
2910
2911 /*
2912 * Risks a regression on very old machines, but reduces potential
2913 * false positives a damn great deal
2914 */
2915 if (!is_thinkpad)
2916 is_thinkpad = dmi_name_in_vendors("IBM");
2917
2918 if (!is_thinkpad && !force_load)
2919 return -ENODEV;
2920
2921 return 0;
2922 }
2923
2924
2925 /* Module init, exit, parameters */
2926
2927 static struct ibm_init_struct ibms_init[] __initdata = {
2928 {
2929 .init = thinkpad_acpi_driver_init,
2930 .data = &thinkpad_acpi_driver_data,
2931 },
2932 {
2933 .init = hotkey_init,
2934 .data = &hotkey_driver_data,
2935 },
2936 {
2937 .init = bluetooth_init,
2938 .data = &bluetooth_driver_data,
2939 },
2940 {
2941 .init = wan_init,
2942 .data = &wan_driver_data,
2943 },
2944 {
2945 .init = video_init,
2946 .data = &video_driver_data,
2947 },
2948 {
2949 .init = light_init,
2950 .data = &light_driver_data,
2951 },
2952 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2953 {
2954 .init = dock_init,
2955 .data = &dock_driver_data[0],
2956 },
2957 {
2958 .data = &dock_driver_data[1],
2959 },
2960 #endif
2961 #ifdef CONFIG_THINKPAD_ACPI_BAY
2962 {
2963 .init = bay_init,
2964 .data = &bay_driver_data,
2965 },
2966 #endif
2967 {
2968 .init = cmos_init,
2969 .data = &cmos_driver_data,
2970 },
2971 {
2972 .init = led_init,
2973 .data = &led_driver_data,
2974 },
2975 {
2976 .init = beep_init,
2977 .data = &beep_driver_data,
2978 },
2979 {
2980 .init = thermal_init,
2981 .data = &thermal_driver_data,
2982 },
2983 {
2984 .data = &ecdump_driver_data,
2985 },
2986 {
2987 .init = brightness_init,
2988 .data = &brightness_driver_data,
2989 },
2990 {
2991 .data = &volume_driver_data,
2992 },
2993 {
2994 .init = fan_init,
2995 .data = &fan_driver_data,
2996 },
2997 };
2998
2999 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
3000 {
3001 unsigned int i;
3002 struct ibm_struct *ibm;
3003
3004 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3005 ibm = ibms_init[i].data;
3006 BUG_ON(ibm == NULL);
3007
3008 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
3009 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
3010 return -ENOSPC;
3011 strcpy(ibms_init[i].param, val);
3012 strcat(ibms_init[i].param, ",");
3013 return 0;
3014 }
3015 }
3016
3017 return -EINVAL;
3018 }
3019
3020 static int experimental;
3021 module_param(experimental, int, 0);
3022
3023 static u32 dbg_level;
3024 module_param_named(debug, dbg_level, uint, 0);
3025
3026 static int force_load;
3027 module_param(force_load, int, 0);
3028
3029 #define IBM_PARAM(feature) \
3030 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
3031
3032 IBM_PARAM(hotkey);
3033 IBM_PARAM(bluetooth);
3034 IBM_PARAM(video);
3035 IBM_PARAM(light);
3036 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3037 IBM_PARAM(dock);
3038 #endif
3039 #ifdef CONFIG_THINKPAD_ACPI_BAY
3040 IBM_PARAM(bay);
3041 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3042 IBM_PARAM(cmos);
3043 IBM_PARAM(led);
3044 IBM_PARAM(beep);
3045 IBM_PARAM(ecdump);
3046 IBM_PARAM(brightness);
3047 IBM_PARAM(volume);
3048 IBM_PARAM(fan);
3049
3050 static int __init thinkpad_acpi_module_init(void)
3051 {
3052 int ret, i;
3053
3054 ret = probe_for_thinkpad();
3055 if (ret)
3056 return ret;
3057
3058 ibm_thinkpad_ec_found = check_dmi_for_ec();
3059 IBM_ACPIHANDLE_INIT(ecrd);
3060 IBM_ACPIHANDLE_INIT(ecwr);
3061
3062 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
3063 if (!proc_dir) {
3064 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
3065 thinkpad_acpi_module_exit();
3066 return -ENODEV;
3067 }
3068 proc_dir->owner = THIS_MODULE;
3069
3070 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3071 ret = ibm_init(&ibms_init[i]);
3072 if (ret >= 0 && *ibms_init[i].param)
3073 ret = ibms_init[i].data->write(ibms_init[i].param);
3074 if (ret < 0) {
3075 thinkpad_acpi_module_exit();
3076 return ret;
3077 }
3078 }
3079
3080 return 0;
3081 }
3082
3083 static void thinkpad_acpi_module_exit(void)
3084 {
3085 struct ibm_struct *ibm, *itmp;
3086
3087 list_for_each_entry_safe_reverse(ibm, itmp,
3088 &tpacpi_all_drivers,
3089 all_drivers) {
3090 ibm_exit(ibm);
3091 }
3092
3093 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
3094
3095 if (proc_dir)
3096 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
3097
3098 kfree(ibm_thinkpad_ec_found);
3099 }
3100
3101 module_init(thinkpad_acpi_module_init);
3102 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree