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ACPI: thinkpad-acpi: cleanup video subdriver
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blobeba327408516e260645d631089dfcb39d3049d89
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 int status = 0;
685
686 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
687
688 IBM_ACPIHANDLE_INIT(hkey);
689
690 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
691 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
692 tp_features.bluetooth = hkey_handle &&
693 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
694
695 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
696 str_supported(tp_features.bluetooth),
697 status);
698
699 if (tp_features.bluetooth &&
700 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
701 /* no bluetooth hardware present in system */
702 tp_features.bluetooth = 0;
703 dbg_printk(TPACPI_DBG_INIT,
704 "bluetooth hardware not installed\n");
705 }
706
707 return (tp_features.bluetooth)? 0 : 1;
708 }
709
710 static int bluetooth_get_radiosw(void)
711 {
712 int status;
713
714 if (!tp_features.bluetooth)
715 return -ENODEV;
716
717 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
718 return -EIO;
719
720 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
721 }
722
723 static int bluetooth_set_radiosw(int radio_on)
724 {
725 int status;
726
727 if (!tp_features.bluetooth)
728 return -ENODEV;
729
730 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
731 return -EIO;
732 if (radio_on)
733 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
734 else
735 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
736 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
737 return -EIO;
738
739 return 0;
740 }
741
742 static int bluetooth_read(char *p)
743 {
744 int len = 0;
745 int status = bluetooth_get_radiosw();
746
747 if (!tp_features.bluetooth)
748 len += sprintf(p + len, "status:\t\tnot supported\n");
749 else {
750 len += sprintf(p + len, "status:\t\t%s\n",
751 (status)? "enabled" : "disabled");
752 len += sprintf(p + len, "commands:\tenable, disable\n");
753 }
754
755 return len;
756 }
757
758 static int bluetooth_write(char *buf)
759 {
760 char *cmd;
761
762 if (!tp_features.bluetooth)
763 return -ENODEV;
764
765 while ((cmd = next_cmd(&buf))) {
766 if (strlencmp(cmd, "enable") == 0) {
767 bluetooth_set_radiosw(1);
768 } else if (strlencmp(cmd, "disable") == 0) {
769 bluetooth_set_radiosw(0);
770 } else
771 return -EINVAL;
772 }
773
774 return 0;
775 }
776
777 static struct ibm_struct bluetooth_driver_data = {
778 .name = "bluetooth",
779 .read = bluetooth_read,
780 .write = bluetooth_write,
781 };
782
783 /*************************************************************************
784 * Wan subdriver
785 */
786
787 static int __init wan_init(struct ibm_init_struct *iibm)
788 {
789 int status = 0;
790
791 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
792
793 IBM_ACPIHANDLE_INIT(hkey);
794
795 tp_features.wan = hkey_handle &&
796 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
797
798 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
799 str_supported(tp_features.wan),
800 status);
801
802 if (tp_features.wan &&
803 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
804 /* no wan hardware present in system */
805 tp_features.wan = 0;
806 dbg_printk(TPACPI_DBG_INIT,
807 "wan hardware not installed\n");
808 }
809
810 return (tp_features.wan)? 0 : 1;
811 }
812
813 static int wan_get_radiosw(void)
814 {
815 int status;
816
817 if (!tp_features.wan)
818 return -ENODEV;
819
820 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
821 return -EIO;
822
823 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
824 }
825
826 static int wan_set_radiosw(int radio_on)
827 {
828 int status;
829
830 if (!tp_features.wan)
831 return -ENODEV;
832
833 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
834 return -EIO;
835 if (radio_on)
836 status |= TP_ACPI_WANCARD_RADIOSSW;
837 else
838 status &= ~TP_ACPI_WANCARD_RADIOSSW;
839 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
840 return -EIO;
841
842 return 0;
843 }
844
845 static int wan_read(char *p)
846 {
847 int len = 0;
848 int status = wan_get_radiosw();
849
850 if (!tp_features.wan)
851 len += sprintf(p + len, "status:\t\tnot supported\n");
852 else {
853 len += sprintf(p + len, "status:\t\t%s\n",
854 (status)? "enabled" : "disabled");
855 len += sprintf(p + len, "commands:\tenable, disable\n");
856 }
857
858 return len;
859 }
860
861 static int wan_write(char *buf)
862 {
863 char *cmd;
864
865 if (!tp_features.wan)
866 return -ENODEV;
867
868 while ((cmd = next_cmd(&buf))) {
869 if (strlencmp(cmd, "enable") == 0) {
870 wan_set_radiosw(1);
871 } else if (strlencmp(cmd, "disable") == 0) {
872 wan_set_radiosw(0);
873 } else
874 return -EINVAL;
875 }
876
877 return 0;
878 }
879
880 static struct ibm_struct wan_driver_data = {
881 .name = "wan",
882 .read = wan_read,
883 .write = wan_write,
884 .flags.experimental = 1,
885 };
886
887 /*************************************************************************
888 * Video subdriver
889 */
890
891 static enum video_access_mode video_supported;
892 static int video_orig_autosw;
893
894 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
895 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
896 "\\_SB.PCI0.VID0", /* 770e */
897 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
898 "\\_SB.PCI0.AGP.VID", /* all others */
899 ); /* R30, R31 */
900
901 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
902
903 static int __init video_init(struct ibm_init_struct *iibm)
904 {
905 int ivga;
906
907 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
908
909 IBM_ACPIHANDLE_INIT(vid);
910 IBM_ACPIHANDLE_INIT(vid2);
911
912 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
913 /* G41, assume IVGA doesn't change */
914 vid_handle = vid2_handle;
915
916 if (!vid_handle)
917 /* video switching not supported on R30, R31 */
918 video_supported = TPACPI_VIDEO_NONE;
919 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
920 /* 570 */
921 video_supported = TPACPI_VIDEO_570;
922 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
923 /* 600e/x, 770e, 770x */
924 video_supported = TPACPI_VIDEO_770;
925 else
926 /* all others */
927 video_supported = TPACPI_VIDEO_NEW;
928
929 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
930 str_supported(video_supported != TPACPI_VIDEO_NONE),
931 video_supported);
932
933 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
934 }
935
936 static void video_exit(void)
937 {
938 dbg_printk(TPACPI_DBG_EXIT,
939 "restoring original video autoswitch mode\n");
940 if (video_autosw_set(video_orig_autosw))
941 printk(IBM_ERR "error while trying to restore original "
942 "video autoswitch mode\n");
943 }
944
945 static int video_outputsw_get(void)
946 {
947 int status = 0;
948 int i;
949
950 switch (video_supported) {
951 case TPACPI_VIDEO_570:
952 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
953 TP_ACPI_VIDEO_570_PHSCMD))
954 return -EIO;
955 status = i & TP_ACPI_VIDEO_570_PHSMASK;
956 break;
957 case TPACPI_VIDEO_770:
958 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
959 return -EIO;
960 if (i)
961 status |= TP_ACPI_VIDEO_S_LCD;
962 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
963 return -EIO;
964 if (i)
965 status |= TP_ACPI_VIDEO_S_CRT;
966 break;
967 case TPACPI_VIDEO_NEW:
968 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
969 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
970 return -EIO;
971 if (i)
972 status |= TP_ACPI_VIDEO_S_CRT;
973
974 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
975 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
976 return -EIO;
977 if (i)
978 status |= TP_ACPI_VIDEO_S_LCD;
979 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
980 return -EIO;
981 if (i)
982 status |= TP_ACPI_VIDEO_S_DVI;
983 break;
984 default:
985 return -ENOSYS;
986 }
987
988 return status;
989 }
990
991 static int video_outputsw_set(int status)
992 {
993 int autosw;
994 int res = 0;
995
996 switch (video_supported) {
997 case TPACPI_VIDEO_570:
998 res = acpi_evalf(NULL, NULL,
999 "\\_SB.PHS2", "vdd",
1000 TP_ACPI_VIDEO_570_PHS2CMD,
1001 status | TP_ACPI_VIDEO_570_PHS2SET);
1002 break;
1003 case TPACPI_VIDEO_770:
1004 autosw = video_autosw_get();
1005 if (autosw < 0)
1006 return autosw;
1007
1008 res = video_autosw_set(1);
1009 if (res)
1010 return res;
1011 res = acpi_evalf(vid_handle, NULL,
1012 "ASWT", "vdd", status * 0x100, 0);
1013 if (!autosw && video_autosw_set(autosw)) {
1014 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1015 return -EIO;
1016 }
1017 break;
1018 case TPACPI_VIDEO_NEW:
1019 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1020 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1021 break;
1022 default:
1023 return -ENOSYS;
1024 }
1025
1026 return (res)? 0 : -EIO;
1027 }
1028
1029 static int video_autosw_get(void)
1030 {
1031 int autosw = 0;
1032
1033 switch (video_supported) {
1034 case TPACPI_VIDEO_570:
1035 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1036 return -EIO;
1037 break;
1038 case TPACPI_VIDEO_770:
1039 case TPACPI_VIDEO_NEW:
1040 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1041 return -EIO;
1042 break;
1043 default:
1044 return -ENOSYS;
1045 }
1046
1047 return autosw & 1;
1048 }
1049
1050 static int video_autosw_set(int enable)
1051 {
1052 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1053 return -EIO;
1054 return 0;
1055 }
1056
1057 static int video_outputsw_cycle(void)
1058 {
1059 int autosw = video_autosw_get();
1060 int res;
1061
1062 if (autosw < 0)
1063 return autosw;
1064
1065 switch (video_supported) {
1066 case TPACPI_VIDEO_570:
1067 res = video_autosw_set(1);
1068 if (res)
1069 return res;
1070 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1071 break;
1072 case TPACPI_VIDEO_770:
1073 case TPACPI_VIDEO_NEW:
1074 res = video_autosw_set(1);
1075 if (res)
1076 return res;
1077 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1078 break;
1079 default:
1080 return -ENOSYS;
1081 }
1082 if (!autosw && video_autosw_set(autosw)) {
1083 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1084 return -EIO;
1085 }
1086
1087 return (res)? 0 : -EIO;
1088 }
1089
1090 static int video_expand_toggle(void)
1091 {
1092 switch (video_supported) {
1093 case TPACPI_VIDEO_570:
1094 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1095 0 : -EIO;
1096 case TPACPI_VIDEO_770:
1097 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1098 0 : -EIO;
1099 case TPACPI_VIDEO_NEW:
1100 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1101 0 : -EIO;
1102 default:
1103 return -ENOSYS;
1104 }
1105 /* not reached */
1106 }
1107
1108 static int video_read(char *p)
1109 {
1110 int status, autosw;
1111 int len = 0;
1112
1113 if (video_supported == TPACPI_VIDEO_NONE) {
1114 len += sprintf(p + len, "status:\t\tnot supported\n");
1115 return len;
1116 }
1117
1118 status = video_outputsw_get();
1119 if (status < 0)
1120 return status;
1121
1122 autosw = video_autosw_get();
1123 if (autosw < 0)
1124 return autosw;
1125
1126 len += sprintf(p + len, "status:\t\tsupported\n");
1127 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1128 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1129 if (video_supported == TPACPI_VIDEO_NEW)
1130 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1131 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1132 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1133 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1134 if (video_supported == TPACPI_VIDEO_NEW)
1135 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1136 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1137 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1138
1139 return len;
1140 }
1141
1142 static int video_write(char *buf)
1143 {
1144 char *cmd;
1145 int enable, disable, status;
1146 int res;
1147
1148 if (video_supported == TPACPI_VIDEO_NONE)
1149 return -ENODEV;
1150
1151 enable = 0;
1152 disable = 0;
1153
1154 while ((cmd = next_cmd(&buf))) {
1155 if (strlencmp(cmd, "lcd_enable") == 0) {
1156 enable |= TP_ACPI_VIDEO_S_LCD;
1157 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1158 disable |= TP_ACPI_VIDEO_S_LCD;
1159 } else if (strlencmp(cmd, "crt_enable") == 0) {
1160 enable |= TP_ACPI_VIDEO_S_CRT;
1161 } else if (strlencmp(cmd, "crt_disable") == 0) {
1162 disable |= TP_ACPI_VIDEO_S_CRT;
1163 } else if (video_supported == TPACPI_VIDEO_NEW &&
1164 strlencmp(cmd, "dvi_enable") == 0) {
1165 enable |= TP_ACPI_VIDEO_S_DVI;
1166 } else if (video_supported == TPACPI_VIDEO_NEW &&
1167 strlencmp(cmd, "dvi_disable") == 0) {
1168 disable |= TP_ACPI_VIDEO_S_DVI;
1169 } else if (strlencmp(cmd, "auto_enable") == 0) {
1170 res = video_autosw_set(1);
1171 if (res)
1172 return res;
1173 } else if (strlencmp(cmd, "auto_disable") == 0) {
1174 res = video_autosw_set(0);
1175 if (res)
1176 return res;
1177 } else if (strlencmp(cmd, "video_switch") == 0) {
1178 res = video_outputsw_cycle();
1179 if (res)
1180 return res;
1181 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1182 res = video_expand_toggle();
1183 if (res)
1184 return res;
1185 } else
1186 return -EINVAL;
1187 }
1188
1189 if (enable || disable) {
1190 status = video_outputsw_get();
1191 if (status < 0)
1192 return status;
1193 res = video_outputsw_set((status & ~disable) | enable);
1194 if (res)
1195 return res;
1196 }
1197
1198 return 0;
1199 }
1200
1201 static struct ibm_struct video_driver_data = {
1202 .name = "video",
1203 .read = video_read,
1204 .write = video_write,
1205 .exit = video_exit,
1206 };
1207
1208 /*************************************************************************
1209 * Light (thinklight) subdriver
1210 */
1211
1212 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1213 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1214
1215 static int __init light_init(struct ibm_init_struct *iibm)
1216 {
1217 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1218
1219 IBM_ACPIHANDLE_INIT(ledb);
1220 IBM_ACPIHANDLE_INIT(lght);
1221 IBM_ACPIHANDLE_INIT(cmos);
1222
1223 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1224 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1225
1226 if (tp_features.light)
1227 /* light status not supported on
1228 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1229 tp_features.light_status =
1230 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1231
1232 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1233 str_supported(tp_features.light));
1234
1235 return (tp_features.light)? 0 : 1;
1236 }
1237
1238 static int light_read(char *p)
1239 {
1240 int len = 0;
1241 int status = 0;
1242
1243 if (!tp_features.light) {
1244 len += sprintf(p + len, "status:\t\tnot supported\n");
1245 } else if (!tp_features.light_status) {
1246 len += sprintf(p + len, "status:\t\tunknown\n");
1247 len += sprintf(p + len, "commands:\ton, off\n");
1248 } else {
1249 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1250 return -EIO;
1251 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1252 len += sprintf(p + len, "commands:\ton, off\n");
1253 }
1254
1255 return len;
1256 }
1257
1258 static int light_write(char *buf)
1259 {
1260 int cmos_cmd, lght_cmd;
1261 char *cmd;
1262 int success;
1263
1264 if (!tp_features.light)
1265 return -ENODEV;
1266
1267 while ((cmd = next_cmd(&buf))) {
1268 if (strlencmp(cmd, "on") == 0) {
1269 cmos_cmd = 0x0c;
1270 lght_cmd = 1;
1271 } else if (strlencmp(cmd, "off") == 0) {
1272 cmos_cmd = 0x0d;
1273 lght_cmd = 0;
1274 } else
1275 return -EINVAL;
1276
1277 success = cmos_handle ?
1278 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1279 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1280 if (!success)
1281 return -EIO;
1282 }
1283
1284 return 0;
1285 }
1286
1287 static struct ibm_struct light_driver_data = {
1288 .name = "light",
1289 .read = light_read,
1290 .write = light_write,
1291 };
1292
1293 /*************************************************************************
1294 * Dock subdriver
1295 */
1296
1297 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1298
1299 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1300 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1301 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1302 "\\_SB.PCI.ISA.SLCE", /* 570 */
1303 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1304
1305 /* don't list other alternatives as we install a notify handler on the 570 */
1306 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1307
1308 #define dock_docked() (_sta(dock_handle) & 1)
1309
1310 static int __init dock_init(struct ibm_init_struct *iibm)
1311 {
1312 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1313
1314 IBM_ACPIHANDLE_INIT(dock);
1315 IBM_ACPIHANDLE_INIT(pci);
1316
1317 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1318 str_supported(dock_handle != NULL));
1319
1320 return (dock_handle)? 0 : 1;
1321 }
1322
1323 static void dock_notify(struct ibm_struct *ibm, u32 event)
1324 {
1325 int docked = dock_docked();
1326 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1327
1328 if (event == 1 && !pci) /* 570 */
1329 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1330 else if (event == 1 && pci) /* 570 */
1331 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1332 else if (event == 3 && docked)
1333 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1334 else if (event == 3 && !docked)
1335 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
1336 else if (event == 0 && docked)
1337 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1338 else {
1339 printk(IBM_ERR "unknown dock event %d, status %d\n",
1340 event, _sta(dock_handle));
1341 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
1342 }
1343 }
1344
1345 static int dock_read(char *p)
1346 {
1347 int len = 0;
1348 int docked = dock_docked();
1349
1350 if (!dock_handle)
1351 len += sprintf(p + len, "status:\t\tnot supported\n");
1352 else if (!docked)
1353 len += sprintf(p + len, "status:\t\tundocked\n");
1354 else {
1355 len += sprintf(p + len, "status:\t\tdocked\n");
1356 len += sprintf(p + len, "commands:\tdock, undock\n");
1357 }
1358
1359 return len;
1360 }
1361
1362 static int dock_write(char *buf)
1363 {
1364 char *cmd;
1365
1366 if (!dock_docked())
1367 return -ENODEV;
1368
1369 while ((cmd = next_cmd(&buf))) {
1370 if (strlencmp(cmd, "undock") == 0) {
1371 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1372 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1373 return -EIO;
1374 } else if (strlencmp(cmd, "dock") == 0) {
1375 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1376 return -EIO;
1377 } else
1378 return -EINVAL;
1379 }
1380
1381 return 0;
1382 }
1383
1384 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1385 {
1386 .notify = dock_notify,
1387 .handle = &dock_handle,
1388 .type = ACPI_SYSTEM_NOTIFY,
1389 },
1390 {
1391 .hid = IBM_PCI_HID,
1392 .notify = dock_notify,
1393 .handle = &pci_handle,
1394 .type = ACPI_SYSTEM_NOTIFY,
1395 },
1396 };
1397
1398 static struct ibm_struct dock_driver_data[2] = {
1399 {
1400 .name = "dock",
1401 .read = dock_read,
1402 .write = dock_write,
1403 .acpi = &ibm_dock_acpidriver[0],
1404 },
1405 {
1406 .name = "dock",
1407 .acpi = &ibm_dock_acpidriver[1],
1408 },
1409 };
1410
1411 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1412
1413 /*************************************************************************
1414 * Bay subdriver
1415 */
1416
1417 #ifdef CONFIG_THINKPAD_ACPI_BAY
1418 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1419 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1420 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1421 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1422 ); /* A21e, R30, R31 */
1423 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1424 "_EJ0", /* all others */
1425 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1426 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1427 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1428 ); /* all others */
1429 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1430 "_EJ0", /* 770x */
1431 ); /* all others */
1432
1433 static int __init bay_init(struct ibm_init_struct *iibm)
1434 {
1435 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1436
1437 IBM_ACPIHANDLE_INIT(bay);
1438 if (bay_handle)
1439 IBM_ACPIHANDLE_INIT(bay_ej);
1440 IBM_ACPIHANDLE_INIT(bay2);
1441 if (bay2_handle)
1442 IBM_ACPIHANDLE_INIT(bay2_ej);
1443
1444 tp_features.bay_status = bay_handle &&
1445 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1446 tp_features.bay_status2 = bay2_handle &&
1447 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1448
1449 tp_features.bay_eject = bay_handle && bay_ej_handle &&
1450 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1451 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1452 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1453
1454 vdbg_printk(TPACPI_DBG_INIT,
1455 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1456 str_supported(tp_features.bay_status),
1457 str_supported(tp_features.bay_eject),
1458 str_supported(tp_features.bay_status2),
1459 str_supported(tp_features.bay_eject2));
1460
1461 return (tp_features.bay_status || tp_features.bay_eject ||
1462 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1463 }
1464
1465 static void bay_notify(struct ibm_struct *ibm, u32 event)
1466 {
1467 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1468 }
1469
1470 #define bay_occupied(b) (_sta(b##_handle) & 1)
1471
1472 static int bay_read(char *p)
1473 {
1474 int len = 0;
1475 int occupied = bay_occupied(bay);
1476 int occupied2 = bay_occupied(bay2);
1477 int eject, eject2;
1478
1479 len += sprintf(p + len, "status:\t\t%s\n",
1480 tp_features.bay_status ?
1481 (occupied ? "occupied" : "unoccupied") :
1482 "not supported");
1483 if (tp_features.bay_status2)
1484 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1485 "occupied" : "unoccupied");
1486
1487 eject = tp_features.bay_eject && occupied;
1488 eject2 = tp_features.bay_eject2 && occupied2;
1489
1490 if (eject && eject2)
1491 len += sprintf(p + len, "commands:\teject, eject2\n");
1492 else if (eject)
1493 len += sprintf(p + len, "commands:\teject\n");
1494 else if (eject2)
1495 len += sprintf(p + len, "commands:\teject2\n");
1496
1497 return len;
1498 }
1499
1500 static int bay_write(char *buf)
1501 {
1502 char *cmd;
1503
1504 if (!tp_features.bay_eject && !tp_features.bay_eject2)
1505 return -ENODEV;
1506
1507 while ((cmd = next_cmd(&buf))) {
1508 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1509 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1510 return -EIO;
1511 } else if (tp_features.bay_eject2 &&
1512 strlencmp(cmd, "eject2") == 0) {
1513 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1514 return -EIO;
1515 } else
1516 return -EINVAL;
1517 }
1518
1519 return 0;
1520 }
1521
1522 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
1523 .notify = bay_notify,
1524 .handle = &bay_handle,
1525 .type = ACPI_SYSTEM_NOTIFY,
1526 };
1527
1528 static struct ibm_struct bay_driver_data = {
1529 .name = "bay",
1530 .read = bay_read,
1531 .write = bay_write,
1532 .acpi = &ibm_bay_acpidriver,
1533 };
1534
1535 #endif /* CONFIG_THINKPAD_ACPI_BAY */
1536
1537 /*************************************************************************
1538 * CMOS subdriver
1539 */
1540
1541 static int __init cmos_init(struct ibm_init_struct *iibm)
1542 {
1543 vdbg_printk(TPACPI_DBG_INIT,
1544 "initializing cmos commands subdriver\n");
1545
1546 IBM_ACPIHANDLE_INIT(cmos);
1547
1548 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1549 str_supported(cmos_handle != NULL));
1550 return (cmos_handle)? 0 : 1;
1551 }
1552
1553 static int cmos_eval(int cmos_cmd)
1554 {
1555 if (cmos_handle)
1556 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1557 else
1558 return 1;
1559 }
1560
1561 static int cmos_read(char *p)
1562 {
1563 int len = 0;
1564
1565 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1566 R30, R31, T20-22, X20-21 */
1567 if (!cmos_handle)
1568 len += sprintf(p + len, "status:\t\tnot supported\n");
1569 else {
1570 len += sprintf(p + len, "status:\t\tsupported\n");
1571 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1572 }
1573
1574 return len;
1575 }
1576
1577 static int cmos_write(char *buf)
1578 {
1579 char *cmd;
1580 int cmos_cmd;
1581
1582 if (!cmos_handle)
1583 return -EINVAL;
1584
1585 while ((cmd = next_cmd(&buf))) {
1586 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1587 cmos_cmd >= 0 && cmos_cmd <= 21) {
1588 /* cmos_cmd set */
1589 } else
1590 return -EINVAL;
1591
1592 if (!cmos_eval(cmos_cmd))
1593 return -EIO;
1594 }
1595
1596 return 0;
1597 }
1598
1599 static struct ibm_struct cmos_driver_data = {
1600 .name = "cmos",
1601 .read = cmos_read,
1602 .write = cmos_write,
1603 };
1604
1605 /*************************************************************************
1606 * LED subdriver
1607 */
1608
1609 static enum led_access_mode led_supported;
1610
1611 IBM_HANDLE(led, ec, "SLED", /* 570 */
1612 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1613 "LED", /* all others */
1614 ); /* R30, R31 */
1615
1616 static int __init led_init(struct ibm_init_struct *iibm)
1617 {
1618 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
1619
1620 IBM_ACPIHANDLE_INIT(led);
1621
1622 if (!led_handle)
1623 /* led not supported on R30, R31 */
1624 led_supported = TPACPI_LED_NONE;
1625 else if (strlencmp(led_path, "SLED") == 0)
1626 /* 570 */
1627 led_supported = TPACPI_LED_570;
1628 else if (strlencmp(led_path, "SYSL") == 0)
1629 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1630 led_supported = TPACPI_LED_OLD;
1631 else
1632 /* all others */
1633 led_supported = TPACPI_LED_NEW;
1634
1635 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
1636 str_supported(led_supported), led_supported);
1637
1638 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
1639 }
1640
1641 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1642
1643 static int led_read(char *p)
1644 {
1645 int len = 0;
1646
1647 if (!led_supported) {
1648 len += sprintf(p + len, "status:\t\tnot supported\n");
1649 return len;
1650 }
1651 len += sprintf(p + len, "status:\t\tsupported\n");
1652
1653 if (led_supported == TPACPI_LED_570) {
1654 /* 570 */
1655 int i, status;
1656 for (i = 0; i < 8; i++) {
1657 if (!acpi_evalf(ec_handle,
1658 &status, "GLED", "dd", 1 << i))
1659 return -EIO;
1660 len += sprintf(p + len, "%d:\t\t%s\n",
1661 i, led_status(status));
1662 }
1663 }
1664
1665 len += sprintf(p + len, "commands:\t"
1666 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1667
1668 return len;
1669 }
1670
1671 /* off, on, blink */
1672 static const int led_sled_arg1[] = { 0, 1, 3 };
1673 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1674 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1675 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1676
1677 static int led_write(char *buf)
1678 {
1679 char *cmd;
1680 int led, ind, ret;
1681
1682 if (!led_supported)
1683 return -ENODEV;
1684
1685 while ((cmd = next_cmd(&buf))) {
1686 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1687 return -EINVAL;
1688
1689 if (strstr(cmd, "off")) {
1690 ind = 0;
1691 } else if (strstr(cmd, "on")) {
1692 ind = 1;
1693 } else if (strstr(cmd, "blink")) {
1694 ind = 2;
1695 } else
1696 return -EINVAL;
1697
1698 if (led_supported == TPACPI_LED_570) {
1699 /* 570 */
1700 led = 1 << led;
1701 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1702 led, led_sled_arg1[ind]))
1703 return -EIO;
1704 } else if (led_supported == TPACPI_LED_OLD) {
1705 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1706 led = 1 << led;
1707 ret = ec_write(TPACPI_LED_EC_HLMS, led);
1708 if (ret >= 0)
1709 ret =
1710 ec_write(TPACPI_LED_EC_HLBL,
1711 led * led_exp_hlbl[ind]);
1712 if (ret >= 0)
1713 ret =
1714 ec_write(TPACPI_LED_EC_HLCL,
1715 led * led_exp_hlcl[ind]);
1716 if (ret < 0)
1717 return ret;
1718 } else {
1719 /* all others */
1720 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1721 led, led_led_arg1[ind]))
1722 return -EIO;
1723 }
1724 }
1725
1726 return 0;
1727 }
1728
1729 static struct ibm_struct led_driver_data = {
1730 .name = "led",
1731 .read = led_read,
1732 .write = led_write,
1733 };
1734
1735 /*************************************************************************
1736 * Beep subdriver
1737 */
1738
1739 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
1740
1741 static int __init beep_init(struct ibm_init_struct *iibm)
1742 {
1743 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
1744
1745 IBM_ACPIHANDLE_INIT(beep);
1746
1747 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
1748 str_supported(beep_handle != NULL));
1749
1750 return (beep_handle)? 0 : 1;
1751 }
1752
1753 static int beep_read(char *p)
1754 {
1755 int len = 0;
1756
1757 if (!beep_handle)
1758 len += sprintf(p + len, "status:\t\tnot supported\n");
1759 else {
1760 len += sprintf(p + len, "status:\t\tsupported\n");
1761 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1762 }
1763
1764 return len;
1765 }
1766
1767 static int beep_write(char *buf)
1768 {
1769 char *cmd;
1770 int beep_cmd;
1771
1772 if (!beep_handle)
1773 return -ENODEV;
1774
1775 while ((cmd = next_cmd(&buf))) {
1776 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1777 beep_cmd >= 0 && beep_cmd <= 17) {
1778 /* beep_cmd set */
1779 } else
1780 return -EINVAL;
1781 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1782 return -EIO;
1783 }
1784
1785 return 0;
1786 }
1787
1788 static struct ibm_struct beep_driver_data = {
1789 .name = "beep",
1790 .read = beep_read,
1791 .write = beep_write,
1792 };
1793
1794 /*************************************************************************
1795 * Thermal subdriver
1796 */
1797
1798 static enum thermal_access_mode thermal_read_mode;
1799
1800 static int __init thermal_init(struct ibm_init_struct *iibm)
1801 {
1802 u8 t, ta1, ta2;
1803 int i;
1804 int acpi_tmp7;
1805
1806 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
1807
1808 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1809
1810 if (ibm_thinkpad_ec_found && experimental) {
1811 /*
1812 * Direct EC access mode: sensors at registers
1813 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1814 * non-implemented, thermal sensors return 0x80 when
1815 * not available
1816 */
1817
1818 ta1 = ta2 = 0;
1819 for (i = 0; i < 8; i++) {
1820 if (likely(acpi_ec_read(0x78 + i, &t))) {
1821 ta1 |= t;
1822 } else {
1823 ta1 = 0;
1824 break;
1825 }
1826 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1827 ta2 |= t;
1828 } else {
1829 ta1 = 0;
1830 break;
1831 }
1832 }
1833 if (ta1 == 0) {
1834 /* This is sheer paranoia, but we handle it anyway */
1835 if (acpi_tmp7) {
1836 printk(IBM_ERR
1837 "ThinkPad ACPI EC access misbehaving, "
1838 "falling back to ACPI TMPx access mode\n");
1839 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1840 } else {
1841 printk(IBM_ERR
1842 "ThinkPad ACPI EC access misbehaving, "
1843 "disabling thermal sensors access\n");
1844 thermal_read_mode = TPACPI_THERMAL_NONE;
1845 }
1846 } else {
1847 thermal_read_mode =
1848 (ta2 != 0) ?
1849 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
1850 }
1851 } else if (acpi_tmp7) {
1852 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1853 /* 600e/x, 770e, 770x */
1854 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
1855 } else {
1856 /* Standard ACPI TMPx access, max 8 sensors */
1857 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1858 }
1859 } else {
1860 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1861 thermal_read_mode = TPACPI_THERMAL_NONE;
1862 }
1863
1864 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
1865 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
1866 thermal_read_mode);
1867
1868 return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
1869 }
1870
1871 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1872 {
1873 int i, t;
1874 s8 tmp;
1875 char tmpi[] = "TMPi";
1876
1877 if (!s)
1878 return -EINVAL;
1879
1880 switch (thermal_read_mode) {
1881 #if TPACPI_MAX_THERMAL_SENSORS >= 16
1882 case TPACPI_THERMAL_TPEC_16:
1883 for (i = 0; i < 8; i++) {
1884 if (!acpi_ec_read(0xC0 + i, &tmp))
1885 return -EIO;
1886 s->temp[i + 8] = tmp * 1000;
1887 }
1888 /* fallthrough */
1889 #endif
1890 case TPACPI_THERMAL_TPEC_8:
1891 for (i = 0; i < 8; i++) {
1892 if (!acpi_ec_read(0x78 + i, &tmp))
1893 return -EIO;
1894 s->temp[i] = tmp * 1000;
1895 }
1896 return (thermal_read_mode == TPACPI_THERMAL_TPEC_16) ? 16 : 8;
1897
1898 case TPACPI_THERMAL_ACPI_UPDT:
1899 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1900 return -EIO;
1901 for (i = 0; i < 8; i++) {
1902 tmpi[3] = '0' + i;
1903 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1904 return -EIO;
1905 s->temp[i] = (t - 2732) * 100;
1906 }
1907 return 8;
1908
1909 case TPACPI_THERMAL_ACPI_TMP07:
1910 for (i = 0; i < 8; i++) {
1911 tmpi[3] = '0' + i;
1912 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1913 return -EIO;
1914 s->temp[i] = t * 1000;
1915 }
1916 return 8;
1917
1918 case TPACPI_THERMAL_NONE:
1919 default:
1920 return 0;
1921 }
1922 }
1923
1924 static int thermal_read(char *p)
1925 {
1926 int len = 0;
1927 int n, i;
1928 struct ibm_thermal_sensors_struct t;
1929
1930 n = thermal_get_sensors(&t);
1931 if (unlikely(n < 0))
1932 return n;
1933
1934 len += sprintf(p + len, "temperatures:\t");
1935
1936 if (n > 0) {
1937 for (i = 0; i < (n - 1); i++)
1938 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1939 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1940 } else
1941 len += sprintf(p + len, "not supported\n");
1942
1943 return len;
1944 }
1945
1946 static struct ibm_struct thermal_driver_data = {
1947 .name = "thermal",
1948 .read = thermal_read,
1949 };
1950
1951 /*************************************************************************
1952 * EC Dump subdriver
1953 */
1954
1955 static u8 ecdump_regs[256];
1956
1957 static int ecdump_read(char *p)
1958 {
1959 int len = 0;
1960 int i, j;
1961 u8 v;
1962
1963 len += sprintf(p + len, "EC "
1964 " +00 +01 +02 +03 +04 +05 +06 +07"
1965 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1966 for (i = 0; i < 256; i += 16) {
1967 len += sprintf(p + len, "EC 0x%02x:", i);
1968 for (j = 0; j < 16; j++) {
1969 if (!acpi_ec_read(i + j, &v))
1970 break;
1971 if (v != ecdump_regs[i + j])
1972 len += sprintf(p + len, " *%02x", v);
1973 else
1974 len += sprintf(p + len, " %02x", v);
1975 ecdump_regs[i + j] = v;
1976 }
1977 len += sprintf(p + len, "\n");
1978 if (j != 16)
1979 break;
1980 }
1981
1982 /* These are way too dangerous to advertise openly... */
1983 #if 0
1984 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1985 " (<offset> is 00-ff, <value> is 00-ff)\n");
1986 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1987 " (<offset> is 00-ff, <value> is 0-255)\n");
1988 #endif
1989 return len;
1990 }
1991
1992 static int ecdump_write(char *buf)
1993 {
1994 char *cmd;
1995 int i, v;
1996
1997 while ((cmd = next_cmd(&buf))) {
1998 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1999 /* i and v set */
2000 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2001 /* i and v set */
2002 } else
2003 return -EINVAL;
2004 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2005 if (!acpi_ec_write(i, v))
2006 return -EIO;
2007 } else
2008 return -EINVAL;
2009 }
2010
2011 return 0;
2012 }
2013
2014 static struct ibm_struct ecdump_driver_data = {
2015 .name = "ecdump",
2016 .read = ecdump_read,
2017 .write = ecdump_write,
2018 .flags.experimental = 1,
2019 };
2020
2021 /*************************************************************************
2022 * Backlight/brightness subdriver
2023 */
2024
2025 static struct backlight_device *ibm_backlight_device = NULL;
2026
2027 static struct backlight_ops ibm_backlight_data = {
2028 .get_brightness = brightness_get,
2029 .update_status = brightness_update_status,
2030 };
2031
2032 static int __init brightness_init(struct ibm_init_struct *iibm)
2033 {
2034 int b;
2035
2036 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2037
2038 b = brightness_get(NULL);
2039 if (b < 0)
2040 return b;
2041
2042 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
2043 &ibm_backlight_data);
2044 if (IS_ERR(ibm_backlight_device)) {
2045 printk(IBM_ERR "Could not register backlight device\n");
2046 return PTR_ERR(ibm_backlight_device);
2047 }
2048 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2049
2050 ibm_backlight_device->props.max_brightness = 7;
2051 ibm_backlight_device->props.brightness = b;
2052 backlight_update_status(ibm_backlight_device);
2053
2054 return 0;
2055 }
2056
2057 static void brightness_exit(void)
2058 {
2059 if (ibm_backlight_device) {
2060 vdbg_printk(TPACPI_DBG_EXIT,
2061 "calling backlight_device_unregister()\n");
2062 backlight_device_unregister(ibm_backlight_device);
2063 ibm_backlight_device = NULL;
2064 }
2065 }
2066
2067 static int brightness_update_status(struct backlight_device *bd)
2068 {
2069 return brightness_set(
2070 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2071 bd->props.power == FB_BLANK_UNBLANK) ?
2072 bd->props.brightness : 0);
2073 }
2074
2075 static int brightness_get(struct backlight_device *bd)
2076 {
2077 u8 level;
2078 if (!acpi_ec_read(brightness_offset, &level))
2079 return -EIO;
2080
2081 level &= 0x7;
2082
2083 return level;
2084 }
2085
2086 static int brightness_set(int value)
2087 {
2088 int cmos_cmd, inc, i;
2089 int current_value = brightness_get(NULL);
2090
2091 value &= 7;
2092
2093 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2094 inc = value > current_value ? 1 : -1;
2095 for (i = current_value; i != value; i += inc) {
2096 if (!cmos_eval(cmos_cmd))
2097 return -EIO;
2098 if (!acpi_ec_write(brightness_offset, i + inc))
2099 return -EIO;
2100 }
2101
2102 return 0;
2103 }
2104
2105 static int brightness_read(char *p)
2106 {
2107 int len = 0;
2108 int level;
2109
2110 if ((level = brightness_get(NULL)) < 0) {
2111 len += sprintf(p + len, "level:\t\tunreadable\n");
2112 } else {
2113 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2114 len += sprintf(p + len, "commands:\tup, down\n");
2115 len += sprintf(p + len, "commands:\tlevel <level>"
2116 " (<level> is 0-7)\n");
2117 }
2118
2119 return len;
2120 }
2121
2122 static int brightness_write(char *buf)
2123 {
2124 int level;
2125 int new_level;
2126 char *cmd;
2127
2128 while ((cmd = next_cmd(&buf))) {
2129 if ((level = brightness_get(NULL)) < 0)
2130 return level;
2131 level &= 7;
2132
2133 if (strlencmp(cmd, "up") == 0) {
2134 new_level = level == 7 ? 7 : level + 1;
2135 } else if (strlencmp(cmd, "down") == 0) {
2136 new_level = level == 0 ? 0 : level - 1;
2137 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2138 new_level >= 0 && new_level <= 7) {
2139 /* new_level set */
2140 } else
2141 return -EINVAL;
2142
2143 brightness_set(new_level);
2144 }
2145
2146 return 0;
2147 }
2148
2149 static struct ibm_struct brightness_driver_data = {
2150 .name = "brightness",
2151 .read = brightness_read,
2152 .write = brightness_write,
2153 .exit = brightness_exit,
2154 };
2155
2156 /*************************************************************************
2157 * Volume subdriver
2158 */
2159
2160 static int volume_read(char *p)
2161 {
2162 int len = 0;
2163 u8 level;
2164
2165 if (!acpi_ec_read(volume_offset, &level)) {
2166 len += sprintf(p + len, "level:\t\tunreadable\n");
2167 } else {
2168 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2169 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2170 len += sprintf(p + len, "commands:\tup, down, mute\n");
2171 len += sprintf(p + len, "commands:\tlevel <level>"
2172 " (<level> is 0-15)\n");
2173 }
2174
2175 return len;
2176 }
2177
2178 static int volume_write(char *buf)
2179 {
2180 int cmos_cmd, inc, i;
2181 u8 level, mute;
2182 int new_level, new_mute;
2183 char *cmd;
2184
2185 while ((cmd = next_cmd(&buf))) {
2186 if (!acpi_ec_read(volume_offset, &level))
2187 return -EIO;
2188 new_mute = mute = level & 0x40;
2189 new_level = level = level & 0xf;
2190
2191 if (strlencmp(cmd, "up") == 0) {
2192 if (mute)
2193 new_mute = 0;
2194 else
2195 new_level = level == 15 ? 15 : level + 1;
2196 } else if (strlencmp(cmd, "down") == 0) {
2197 if (mute)
2198 new_mute = 0;
2199 else
2200 new_level = level == 0 ? 0 : level - 1;
2201 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2202 new_level >= 0 && new_level <= 15) {
2203 /* new_level set */
2204 } else if (strlencmp(cmd, "mute") == 0) {
2205 new_mute = 0x40;
2206 } else
2207 return -EINVAL;
2208
2209 if (new_level != level) { /* mute doesn't change */
2210 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2211 inc = new_level > level ? 1 : -1;
2212
2213 if (mute && (!cmos_eval(cmos_cmd) ||
2214 !acpi_ec_write(volume_offset, level)))
2215 return -EIO;
2216
2217 for (i = level; i != new_level; i += inc)
2218 if (!cmos_eval(cmos_cmd) ||
2219 !acpi_ec_write(volume_offset, i + inc))
2220 return -EIO;
2221
2222 if (mute && (!cmos_eval(TP_CMOS_VOLUME_MUTE) ||
2223 !acpi_ec_write(volume_offset,
2224 new_level + mute)))
2225 return -EIO;
2226 }
2227
2228 if (new_mute != mute) { /* level doesn't change */
2229 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2230
2231 if (!cmos_eval(cmos_cmd) ||
2232 !acpi_ec_write(volume_offset, level + new_mute))
2233 return -EIO;
2234 }
2235 }
2236
2237 return 0;
2238 }
2239
2240 static struct ibm_struct volume_driver_data = {
2241 .name = "volume",
2242 .read = volume_read,
2243 .write = volume_write,
2244 };
2245
2246 /*************************************************************************
2247 * Fan subdriver
2248 */
2249
2250 /*
2251 * FAN ACCESS MODES
2252 *
2253 * TPACPI_FAN_RD_ACPI_GFAN:
2254 * ACPI GFAN method: returns fan level
2255 *
2256 * see TPACPI_FAN_WR_ACPI_SFAN
2257 * EC 0x2f (HFSP) not available if GFAN exists
2258 *
2259 * TPACPI_FAN_WR_ACPI_SFAN:
2260 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2261 *
2262 * EC 0x2f (HFSP) might be available *for reading*, but do not use
2263 * it for writing.
2264 *
2265 * TPACPI_FAN_WR_TPEC:
2266 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
2267 * Supported on almost all ThinkPads
2268 *
2269 * Fan speed changes of any sort (including those caused by the
2270 * disengaged mode) are usually done slowly by the firmware as the
2271 * maximum ammount of fan duty cycle change per second seems to be
2272 * limited.
2273 *
2274 * Reading is not available if GFAN exists.
2275 * Writing is not available if SFAN exists.
2276 *
2277 * Bits
2278 * 7 automatic mode engaged;
2279 * (default operation mode of the ThinkPad)
2280 * fan level is ignored in this mode.
2281 * 6 full speed mode (takes precedence over bit 7);
2282 * not available on all thinkpads. May disable
2283 * the tachometer while the fan controller ramps up
2284 * the speed (which can take up to a few *minutes*).
2285 * Speeds up fan to 100% duty-cycle, which is far above
2286 * the standard RPM levels. It is not impossible that
2287 * it could cause hardware damage.
2288 * 5-3 unused in some models. Extra bits for fan level
2289 * in others, but still useless as all values above
2290 * 7 map to the same speed as level 7 in these models.
2291 * 2-0 fan level (0..7 usually)
2292 * 0x00 = stop
2293 * 0x07 = max (set when temperatures critical)
2294 * Some ThinkPads may have other levels, see
2295 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2296 *
2297 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2298 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2299 * does so, its initial value is meaningless (0x07).
2300 *
2301 * For firmware bugs, refer to:
2302 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2303 *
2304 * ----
2305 *
2306 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2307 * Main fan tachometer reading (in RPM)
2308 *
2309 * This register is present on all ThinkPads with a new-style EC, and
2310 * it is known not to be present on the A21m/e, and T22, as there is
2311 * something else in offset 0x84 according to the ACPI DSDT. Other
2312 * ThinkPads from this same time period (and earlier) probably lack the
2313 * tachometer as well.
2314 *
2315 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2316 * was never fixed by IBM to report the EC firmware version string
2317 * probably support the tachometer (like the early X models), so
2318 * detecting it is quite hard. We need more data to know for sure.
2319 *
2320 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2321 * might result.
2322 *
2323 * FIRMWARE BUG: may go stale while the EC is switching to full speed
2324 * mode.
2325 *
2326 * For firmware bugs, refer to:
2327 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2328 *
2329 * TPACPI_FAN_WR_ACPI_FANS:
2330 * ThinkPad X31, X40, X41. Not available in the X60.
2331 *
2332 * FANS ACPI handle: takes three arguments: low speed, medium speed,
2333 * high speed. ACPI DSDT seems to map these three speeds to levels
2334 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2335 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2336 *
2337 * The speeds are stored on handles
2338 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2339 *
2340 * There are three default speed sets, acessible as handles:
2341 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2342 *
2343 * ACPI DSDT switches which set is in use depending on various
2344 * factors.
2345 *
2346 * TPACPI_FAN_WR_TPEC is also available and should be used to
2347 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
2348 * but the ACPI tables just mention level 7.
2349 */
2350
2351 static enum fan_status_access_mode fan_status_access_mode;
2352 static enum fan_control_access_mode fan_control_access_mode;
2353 static enum fan_control_commands fan_control_commands;
2354
2355 static u8 fan_control_initial_status;
2356
2357 static void fan_watchdog_fire(struct work_struct *ignored);
2358 static int fan_watchdog_maxinterval;
2359 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
2360
2361 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
2362 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
2363 "\\FSPD", /* 600e/x, 770e, 770x */
2364 ); /* all others */
2365 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
2366 "JFNS", /* 770x-JL */
2367 ); /* all others */
2368
2369 static int __init fan_init(struct ibm_init_struct *iibm)
2370 {
2371 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
2372
2373 fan_status_access_mode = TPACPI_FAN_NONE;
2374 fan_control_access_mode = TPACPI_FAN_WR_NONE;
2375 fan_control_commands = 0;
2376 fan_watchdog_maxinterval = 0;
2377 tp_features.fan_ctrl_status_undef = 0;
2378
2379 IBM_ACPIHANDLE_INIT(fans);
2380 IBM_ACPIHANDLE_INIT(gfan);
2381 IBM_ACPIHANDLE_INIT(sfan);
2382
2383 if (gfan_handle) {
2384 /* 570, 600e/x, 770e, 770x */
2385 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
2386 } else {
2387 /* all other ThinkPads: note that even old-style
2388 * ThinkPad ECs supports the fan control register */
2389 if (likely(acpi_ec_read(fan_status_offset,
2390 &fan_control_initial_status))) {
2391 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
2392
2393 /* In some ThinkPads, neither the EC nor the ACPI
2394 * DSDT initialize the fan status, and it ends up
2395 * being set to 0x07 when it *could* be either
2396 * 0x07 or 0x80.
2397 *
2398 * Enable for TP-1Y (T43), TP-78 (R51e),
2399 * TP-76 (R52), TP-70 (T43, R52), which are known
2400 * to be buggy. */
2401 if (fan_control_initial_status == 0x07 &&
2402 ibm_thinkpad_ec_found &&
2403 ((ibm_thinkpad_ec_found[0] == '1' &&
2404 ibm_thinkpad_ec_found[1] == 'Y') ||
2405 (ibm_thinkpad_ec_found[0] == '7' &&
2406 (ibm_thinkpad_ec_found[1] == '6' ||
2407 ibm_thinkpad_ec_found[1] == '8' ||
2408 ibm_thinkpad_ec_found[1] == '0'))
2409 )) {
2410 printk(IBM_NOTICE
2411 "fan_init: initial fan status is "
2412 "unknown, assuming it is in auto "
2413 "mode\n");
2414 tp_features.fan_ctrl_status_undef = 1;
2415 }
2416 } else {
2417 printk(IBM_ERR
2418 "ThinkPad ACPI EC access misbehaving, "
2419 "fan status and control unavailable\n");
2420 return 1;
2421 }
2422 }
2423
2424 if (sfan_handle) {
2425 /* 570, 770x-JL */
2426 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
2427 fan_control_commands |=
2428 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
2429 } else {
2430 if (!gfan_handle) {
2431 /* gfan without sfan means no fan control */
2432 /* all other models implement TP EC 0x2f control */
2433
2434 if (fans_handle) {
2435 /* X31, X40, X41 */
2436 fan_control_access_mode =
2437 TPACPI_FAN_WR_ACPI_FANS;
2438 fan_control_commands |=
2439 TPACPI_FAN_CMD_SPEED |
2440 TPACPI_FAN_CMD_LEVEL |
2441 TPACPI_FAN_CMD_ENABLE;
2442 } else {
2443 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
2444 fan_control_commands |=
2445 TPACPI_FAN_CMD_LEVEL |
2446 TPACPI_FAN_CMD_ENABLE;
2447 }
2448 }
2449 }
2450
2451 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
2452 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
2453 fan_control_access_mode != TPACPI_FAN_WR_NONE),
2454 fan_status_access_mode, fan_control_access_mode);
2455
2456 return (fan_status_access_mode != TPACPI_FAN_NONE ||
2457 fan_control_access_mode != TPACPI_FAN_WR_NONE)?
2458 0 : 1;
2459 }
2460
2461 static int fan_get_status(u8 *status)
2462 {
2463 u8 s;
2464
2465 /* TODO:
2466 * Add TPACPI_FAN_RD_ACPI_FANS ? */
2467
2468 switch (fan_status_access_mode) {
2469 case TPACPI_FAN_RD_ACPI_GFAN:
2470 /* 570, 600e/x, 770e, 770x */
2471
2472 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
2473 return -EIO;
2474
2475 if (likely(status))
2476 *status = s & 0x07;
2477
2478 break;
2479
2480 case TPACPI_FAN_RD_TPEC:
2481 /* all except 570, 600e/x, 770e, 770x */
2482 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
2483 return -EIO;
2484
2485 if (likely(status))
2486 *status = s;
2487
2488 break;
2489
2490 default:
2491 return -ENXIO;
2492 }
2493
2494 return 0;
2495 }
2496
2497 static void fan_exit(void)
2498 {
2499 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending watchdogs\n");
2500 cancel_delayed_work(&fan_watchdog_task);
2501 flush_scheduled_work();
2502 }
2503
2504 static int fan_get_speed(unsigned int *speed)
2505 {
2506 u8 hi, lo;
2507
2508 switch (fan_status_access_mode) {
2509 case TPACPI_FAN_RD_TPEC:
2510 /* all except 570, 600e/x, 770e, 770x */
2511 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
2512 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
2513 return -EIO;
2514
2515 if (likely(speed))
2516 *speed = (hi << 8) | lo;
2517
2518 break;
2519
2520 default:
2521 return -ENXIO;
2522 }
2523
2524 return 0;
2525 }
2526
2527 static void fan_watchdog_fire(struct work_struct *ignored)
2528 {
2529 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2530 if (fan_set_enable()) {
2531 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2532 /* reschedule for later */
2533 fan_watchdog_reset();
2534 }
2535 }
2536
2537 static void fan_watchdog_reset(void)
2538 {
2539 static int fan_watchdog_active = 0;
2540
2541 if (fan_watchdog_active)
2542 cancel_delayed_work(&fan_watchdog_task);
2543
2544 if (fan_watchdog_maxinterval > 0) {
2545 fan_watchdog_active = 1;
2546 if (!schedule_delayed_work(&fan_watchdog_task,
2547 msecs_to_jiffies(fan_watchdog_maxinterval
2548 * 1000))) {
2549 printk(IBM_ERR "failed to schedule the fan watchdog, "
2550 "watchdog will not trigger\n");
2551 }
2552 } else
2553 fan_watchdog_active = 0;
2554 }
2555
2556 static int fan_set_level(int level)
2557 {
2558 switch (fan_control_access_mode) {
2559 case TPACPI_FAN_WR_ACPI_SFAN:
2560 if (level >= 0 && level <= 7) {
2561 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2562 return -EIO;
2563 } else
2564 return -EINVAL;
2565 break;
2566
2567 case TPACPI_FAN_WR_ACPI_FANS:
2568 case TPACPI_FAN_WR_TPEC:
2569 if ((level != TP_EC_FAN_AUTO) &&
2570 (level != TP_EC_FAN_FULLSPEED) &&
2571 ((level < 0) || (level > 7)))
2572 return -EINVAL;
2573
2574 if (!acpi_ec_write(fan_status_offset, level))
2575 return -EIO;
2576 else
2577 tp_features.fan_ctrl_status_undef = 0;
2578 break;
2579
2580 default:
2581 return -ENXIO;
2582 }
2583 return 0;
2584 }
2585
2586 static int fan_set_enable(void)
2587 {
2588 u8 s;
2589 int rc;
2590
2591 switch (fan_control_access_mode) {
2592 case TPACPI_FAN_WR_ACPI_FANS:
2593 case TPACPI_FAN_WR_TPEC:
2594 if ((rc = fan_get_status(&s)) < 0)
2595 return rc;
2596
2597 /* Don't go out of emergency fan mode */
2598 if (s != 7)
2599 s = TP_EC_FAN_AUTO;
2600
2601 if (!acpi_ec_write(fan_status_offset, s))
2602 return -EIO;
2603 else
2604 tp_features.fan_ctrl_status_undef = 0;
2605 break;
2606
2607 case TPACPI_FAN_WR_ACPI_SFAN:
2608 if ((rc = fan_get_status(&s)) < 0)
2609 return rc;
2610
2611 s &= 0x07;
2612
2613 /* Set fan to at least level 4 */
2614 if (s < 4)
2615 s = 4;
2616
2617 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2618 return -EIO;
2619 break;
2620
2621 default:
2622 return -ENXIO;
2623 }
2624 return 0;
2625 }
2626
2627 static int fan_set_disable(void)
2628 {
2629 switch (fan_control_access_mode) {
2630 case TPACPI_FAN_WR_ACPI_FANS:
2631 case TPACPI_FAN_WR_TPEC:
2632 if (!acpi_ec_write(fan_status_offset, 0x00))
2633 return -EIO;
2634 else
2635 tp_features.fan_ctrl_status_undef = 0;
2636 break;
2637
2638 case TPACPI_FAN_WR_ACPI_SFAN:
2639 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2640 return -EIO;
2641 break;
2642
2643 default:
2644 return -ENXIO;
2645 }
2646 return 0;
2647 }
2648
2649 static int fan_set_speed(int speed)
2650 {
2651 switch (fan_control_access_mode) {
2652 case TPACPI_FAN_WR_ACPI_FANS:
2653 if (speed >= 0 && speed <= 65535) {
2654 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2655 speed, speed, speed))
2656 return -EIO;
2657 } else
2658 return -EINVAL;
2659 break;
2660
2661 default:
2662 return -ENXIO;
2663 }
2664 return 0;
2665 }
2666
2667 static int fan_read(char *p)
2668 {
2669 int len = 0;
2670 int rc;
2671 u8 status;
2672 unsigned int speed = 0;
2673
2674 switch (fan_status_access_mode) {
2675 case TPACPI_FAN_RD_ACPI_GFAN:
2676 /* 570, 600e/x, 770e, 770x */
2677 if ((rc = fan_get_status(&status)) < 0)
2678 return rc;
2679
2680 len += sprintf(p + len, "status:\t\t%s\n"
2681 "level:\t\t%d\n",
2682 (status != 0) ? "enabled" : "disabled", status);
2683 break;
2684
2685 case TPACPI_FAN_RD_TPEC:
2686 /* all except 570, 600e/x, 770e, 770x */
2687 if ((rc = fan_get_status(&status)) < 0)
2688 return rc;
2689
2690 if (unlikely(tp_features.fan_ctrl_status_undef)) {
2691 if (status != fan_control_initial_status)
2692 tp_features.fan_ctrl_status_undef = 0;
2693 else
2694 /* Return most likely status. In fact, it
2695 * might be the only possible status */
2696 status = TP_EC_FAN_AUTO;
2697 }
2698
2699 len += sprintf(p + len, "status:\t\t%s\n",
2700 (status != 0) ? "enabled" : "disabled");
2701
2702 if ((rc = fan_get_speed(&speed)) < 0)
2703 return rc;
2704
2705 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2706
2707 if (status & TP_EC_FAN_FULLSPEED)
2708 /* Disengaged mode takes precedence */
2709 len += sprintf(p + len, "level:\t\tdisengaged\n");
2710 else if (status & TP_EC_FAN_AUTO)
2711 len += sprintf(p + len, "level:\t\tauto\n");
2712 else
2713 len += sprintf(p + len, "level:\t\t%d\n", status);
2714 break;
2715
2716 case TPACPI_FAN_NONE:
2717 default:
2718 len += sprintf(p + len, "status:\t\tnot supported\n");
2719 }
2720
2721 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
2722 len += sprintf(p + len, "commands:\tlevel <level>");
2723
2724 switch (fan_control_access_mode) {
2725 case TPACPI_FAN_WR_ACPI_SFAN:
2726 len += sprintf(p + len, " (<level> is 0-7)\n");
2727 break;
2728
2729 default:
2730 len += sprintf(p + len, " (<level> is 0-7, "
2731 "auto, disengaged)\n");
2732 break;
2733 }
2734 }
2735
2736 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
2737 len += sprintf(p + len, "commands:\tenable, disable\n"
2738 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2739 "1-120 (seconds))\n");
2740
2741 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
2742 len += sprintf(p + len, "commands:\tspeed <speed>"
2743 " (<speed> is 0-65535)\n");
2744
2745 return len;
2746 }
2747
2748 static int fan_write_cmd_level(const char *cmd, int *rc)
2749 {
2750 int level;
2751
2752 if (strlencmp(cmd, "level auto") == 0)
2753 level = TP_EC_FAN_AUTO;
2754 else if (strlencmp(cmd, "level disengaged") == 0)
2755 level = TP_EC_FAN_FULLSPEED;
2756 else if (sscanf(cmd, "level %d", &level) != 1)
2757 return 0;
2758
2759 if ((*rc = fan_set_level(level)) == -ENXIO)
2760 printk(IBM_ERR "level command accepted for unsupported "
2761 "access mode %d", fan_control_access_mode);
2762
2763 return 1;
2764 }
2765
2766 static int fan_write_cmd_enable(const char *cmd, int *rc)
2767 {
2768 if (strlencmp(cmd, "enable") != 0)
2769 return 0;
2770
2771 if ((*rc = fan_set_enable()) == -ENXIO)
2772 printk(IBM_ERR "enable command accepted for unsupported "
2773 "access mode %d", fan_control_access_mode);
2774
2775 return 1;
2776 }
2777
2778 static int fan_write_cmd_disable(const char *cmd, int *rc)
2779 {
2780 if (strlencmp(cmd, "disable") != 0)
2781 return 0;
2782
2783 if ((*rc = fan_set_disable()) == -ENXIO)
2784 printk(IBM_ERR "disable command accepted for unsupported "
2785 "access mode %d", fan_control_access_mode);
2786
2787 return 1;
2788 }
2789
2790 static int fan_write_cmd_speed(const char *cmd, int *rc)
2791 {
2792 int speed;
2793
2794 /* TODO:
2795 * Support speed <low> <medium> <high> ? */
2796
2797 if (sscanf(cmd, "speed %d", &speed) != 1)
2798 return 0;
2799
2800 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2801 printk(IBM_ERR "speed command accepted for unsupported "
2802 "access mode %d", fan_control_access_mode);
2803
2804 return 1;
2805 }
2806
2807 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2808 {
2809 int interval;
2810
2811 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2812 return 0;
2813
2814 if (interval < 0 || interval > 120)
2815 *rc = -EINVAL;
2816 else
2817 fan_watchdog_maxinterval = interval;
2818
2819 return 1;
2820 }
2821
2822 static int fan_write(char *buf)
2823 {
2824 char *cmd;
2825 int rc = 0;
2826
2827 while (!rc && (cmd = next_cmd(&buf))) {
2828 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
2829 fan_write_cmd_level(cmd, &rc)) &&
2830 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
2831 (fan_write_cmd_enable(cmd, &rc) ||
2832 fan_write_cmd_disable(cmd, &rc) ||
2833 fan_write_cmd_watchdog(cmd, &rc))) &&
2834 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
2835 fan_write_cmd_speed(cmd, &rc))
2836 )
2837 rc = -EINVAL;
2838 else if (!rc)
2839 fan_watchdog_reset();
2840 }
2841
2842 return rc;
2843 }
2844
2845 static struct ibm_struct fan_driver_data = {
2846 .name = "fan",
2847 .read = fan_read,
2848 .write = fan_write,
2849 .exit = fan_exit,
2850 .flags.experimental = 1,
2851 };
2852
2853 /****************************************************************************
2854 ****************************************************************************
2855 *
2856 * Infrastructure
2857 *
2858 ****************************************************************************
2859 ****************************************************************************/
2860
2861 /* /proc support */
2862 static struct proc_dir_entry *proc_dir = NULL;
2863
2864 /* Subdriver registry */
2865 static LIST_HEAD(tpacpi_all_drivers);
2866
2867
2868 /*
2869 * Module and infrastructure proble, init and exit handling
2870 */
2871
2872 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
2873 static const char * __init str_supported(int is_supported)
2874 {
2875 static char text_unsupported[] __initdata = "not supported";
2876
2877 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
2878 }
2879 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
2880
2881 static int __init ibm_init(struct ibm_init_struct *iibm)
2882 {
2883 int ret;
2884 struct ibm_struct *ibm = iibm->data;
2885 struct proc_dir_entry *entry;
2886
2887 BUG_ON(ibm == NULL);
2888
2889 INIT_LIST_HEAD(&ibm->all_drivers);
2890
2891 if (ibm->flags.experimental && !experimental)
2892 return 0;
2893
2894 dbg_printk(TPACPI_DBG_INIT,
2895 "probing for %s\n", ibm->name);
2896
2897 if (iibm->init) {
2898 ret = iibm->init(iibm);
2899 if (ret > 0)
2900 return 0; /* probe failed */
2901 if (ret)
2902 return ret;
2903
2904 ibm->flags.init_called = 1;
2905 }
2906
2907 if (ibm->acpi) {
2908 if (ibm->acpi->hid) {
2909 ret = register_tpacpi_subdriver(ibm);
2910 if (ret)
2911 goto err_out;
2912 }
2913
2914 if (ibm->acpi->notify) {
2915 ret = setup_acpi_notify(ibm);
2916 if (ret == -ENODEV) {
2917 printk(IBM_NOTICE "disabling subdriver %s\n",
2918 ibm->name);
2919 ret = 0;
2920 goto err_out;
2921 }
2922 if (ret < 0)
2923 goto err_out;
2924 }
2925 }
2926
2927 dbg_printk(TPACPI_DBG_INIT,
2928 "%s installed\n", ibm->name);
2929
2930 if (ibm->read) {
2931 entry = create_proc_entry(ibm->name,
2932 S_IFREG | S_IRUGO | S_IWUSR,
2933 proc_dir);
2934 if (!entry) {
2935 printk(IBM_ERR "unable to create proc entry %s\n",
2936 ibm->name);
2937 ret = -ENODEV;
2938 goto err_out;
2939 }
2940 entry->owner = THIS_MODULE;
2941 entry->data = ibm;
2942 entry->read_proc = &dispatch_procfs_read;
2943 if (ibm->write)
2944 entry->write_proc = &dispatch_procfs_write;
2945 ibm->flags.proc_created = 1;
2946 }
2947
2948 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
2949
2950 return 0;
2951
2952 err_out:
2953 dbg_printk(TPACPI_DBG_INIT,
2954 "%s: at error exit path with result %d\n",
2955 ibm->name, ret);
2956
2957 ibm_exit(ibm);
2958 return (ret < 0)? ret : 0;
2959 }
2960
2961 static void ibm_exit(struct ibm_struct *ibm)
2962 {
2963 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
2964
2965 list_del_init(&ibm->all_drivers);
2966
2967 if (ibm->flags.acpi_notify_installed) {
2968 dbg_printk(TPACPI_DBG_EXIT,
2969 "%s: acpi_remove_notify_handler\n", ibm->name);
2970 BUG_ON(!ibm->acpi);
2971 acpi_remove_notify_handler(*ibm->acpi->handle,
2972 ibm->acpi->type,
2973 dispatch_acpi_notify);
2974 ibm->flags.acpi_notify_installed = 0;
2975 ibm->flags.acpi_notify_installed = 0;
2976 }
2977
2978 if (ibm->flags.proc_created) {
2979 dbg_printk(TPACPI_DBG_EXIT,
2980 "%s: remove_proc_entry\n", ibm->name);
2981 remove_proc_entry(ibm->name, proc_dir);
2982 ibm->flags.proc_created = 0;
2983 }
2984
2985 if (ibm->flags.acpi_driver_registered) {
2986 dbg_printk(TPACPI_DBG_EXIT,
2987 "%s: acpi_bus_unregister_driver\n", ibm->name);
2988 BUG_ON(!ibm->acpi);
2989 acpi_bus_unregister_driver(ibm->acpi->driver);
2990 kfree(ibm->acpi->driver);
2991 ibm->acpi->driver = NULL;
2992 ibm->flags.acpi_driver_registered = 0;
2993 }
2994
2995 if (ibm->flags.init_called && ibm->exit) {
2996 ibm->exit();
2997 ibm->flags.init_called = 0;
2998 }
2999
3000 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
3001 }
3002
3003 /* Probing */
3004
3005 static char *ibm_thinkpad_ec_found = NULL;
3006
3007 static char* __init check_dmi_for_ec(void)
3008 {
3009 struct dmi_device *dev = NULL;
3010 char ec_fw_string[18];
3011
3012 /*
3013 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
3014 * X32 or newer, all Z series; Some models must have an
3015 * up-to-date BIOS or they will not be detected.
3016 *
3017 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
3018 */
3019 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
3020 if (sscanf(dev->name,
3021 "IBM ThinkPad Embedded Controller -[%17c",
3022 ec_fw_string) == 1) {
3023 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
3024 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
3025 return kstrdup(ec_fw_string, GFP_KERNEL);
3026 }
3027 }
3028 return NULL;
3029 }
3030
3031 static int __init probe_for_thinkpad(void)
3032 {
3033 int is_thinkpad;
3034
3035 if (acpi_disabled)
3036 return -ENODEV;
3037
3038 /*
3039 * Non-ancient models have better DMI tagging, but very old models
3040 * don't.
3041 */
3042 is_thinkpad = dmi_name_in_vendors("ThinkPad");
3043
3044 /* ec is required because many other handles are relative to it */
3045 IBM_ACPIHANDLE_INIT(ec);
3046 if (!ec_handle) {
3047 if (is_thinkpad)
3048 printk(IBM_ERR
3049 "Not yet supported ThinkPad detected!\n");
3050 return -ENODEV;
3051 }
3052
3053 /*
3054 * Risks a regression on very old machines, but reduces potential
3055 * false positives a damn great deal
3056 */
3057 if (!is_thinkpad)
3058 is_thinkpad = dmi_name_in_vendors("IBM");
3059
3060 if (!is_thinkpad && !force_load)
3061 return -ENODEV;
3062
3063 return 0;
3064 }
3065
3066
3067 /* Module init, exit, parameters */
3068
3069 static struct ibm_init_struct ibms_init[] __initdata = {
3070 {
3071 .init = thinkpad_acpi_driver_init,
3072 .data = &thinkpad_acpi_driver_data,
3073 },
3074 {
3075 .init = hotkey_init,
3076 .data = &hotkey_driver_data,
3077 },
3078 {
3079 .init = bluetooth_init,
3080 .data = &bluetooth_driver_data,
3081 },
3082 {
3083 .init = wan_init,
3084 .data = &wan_driver_data,
3085 },
3086 {
3087 .init = video_init,
3088 .data = &video_driver_data,
3089 },
3090 {
3091 .init = light_init,
3092 .data = &light_driver_data,
3093 },
3094 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3095 {
3096 .init = dock_init,
3097 .data = &dock_driver_data[0],
3098 },
3099 {
3100 .data = &dock_driver_data[1],
3101 },
3102 #endif
3103 #ifdef CONFIG_THINKPAD_ACPI_BAY
3104 {
3105 .init = bay_init,
3106 .data = &bay_driver_data,
3107 },
3108 #endif
3109 {
3110 .init = cmos_init,
3111 .data = &cmos_driver_data,
3112 },
3113 {
3114 .init = led_init,
3115 .data = &led_driver_data,
3116 },
3117 {
3118 .init = beep_init,
3119 .data = &beep_driver_data,
3120 },
3121 {
3122 .init = thermal_init,
3123 .data = &thermal_driver_data,
3124 },
3125 {
3126 .data = &ecdump_driver_data,
3127 },
3128 {
3129 .init = brightness_init,
3130 .data = &brightness_driver_data,
3131 },
3132 {
3133 .data = &volume_driver_data,
3134 },
3135 {
3136 .init = fan_init,
3137 .data = &fan_driver_data,
3138 },
3139 };
3140
3141 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
3142 {
3143 unsigned int i;
3144 struct ibm_struct *ibm;
3145
3146 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3147 ibm = ibms_init[i].data;
3148 BUG_ON(ibm == NULL);
3149
3150 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
3151 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
3152 return -ENOSPC;
3153 strcpy(ibms_init[i].param, val);
3154 strcat(ibms_init[i].param, ",");
3155 return 0;
3156 }
3157 }
3158
3159 return -EINVAL;
3160 }
3161
3162 static int experimental;
3163 module_param(experimental, int, 0);
3164
3165 static u32 dbg_level;
3166 module_param_named(debug, dbg_level, uint, 0);
3167
3168 static int force_load;
3169 module_param(force_load, int, 0);
3170
3171 #define IBM_PARAM(feature) \
3172 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
3173
3174 IBM_PARAM(hotkey);
3175 IBM_PARAM(bluetooth);
3176 IBM_PARAM(video);
3177 IBM_PARAM(light);
3178 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3179 IBM_PARAM(dock);
3180 #endif
3181 #ifdef CONFIG_THINKPAD_ACPI_BAY
3182 IBM_PARAM(bay);
3183 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3184 IBM_PARAM(cmos);
3185 IBM_PARAM(led);
3186 IBM_PARAM(beep);
3187 IBM_PARAM(ecdump);
3188 IBM_PARAM(brightness);
3189 IBM_PARAM(volume);
3190 IBM_PARAM(fan);
3191
3192 static int __init thinkpad_acpi_module_init(void)
3193 {
3194 int ret, i;
3195
3196 ret = probe_for_thinkpad();
3197 if (ret)
3198 return ret;
3199
3200 ibm_thinkpad_ec_found = check_dmi_for_ec();
3201 IBM_ACPIHANDLE_INIT(ecrd);
3202 IBM_ACPIHANDLE_INIT(ecwr);
3203
3204 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
3205 if (!proc_dir) {
3206 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
3207 thinkpad_acpi_module_exit();
3208 return -ENODEV;
3209 }
3210 proc_dir->owner = THIS_MODULE;
3211
3212 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3213 ret = ibm_init(&ibms_init[i]);
3214 if (ret >= 0 && *ibms_init[i].param)
3215 ret = ibms_init[i].data->write(ibms_init[i].param);
3216 if (ret < 0) {
3217 thinkpad_acpi_module_exit();
3218 return ret;
3219 }
3220 }
3221
3222 return 0;
3223 }
3224
3225 static void thinkpad_acpi_module_exit(void)
3226 {
3227 struct ibm_struct *ibm, *itmp;
3228
3229 list_for_each_entry_safe_reverse(ibm, itmp,
3230 &tpacpi_all_drivers,
3231 all_drivers) {
3232 ibm_exit(ibm);
3233 }
3234
3235 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
3236
3237 if (proc_dir)
3238 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
3239
3240 kfree(ibm_thinkpad_ec_found);
3241 }
3242
3243 module_init(thinkpad_acpi_module_init);
3244 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree