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ACPI: thinkpad-acpi: clean up CMOS commands subdriver
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blob8829d3c6b44407da1c7a51841ace417d3755c4a4
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 static int issue_thinkpad_cmos_command(int cmos_cmd)
277 {
278 if (!cmos_handle)
279 return -ENXIO;
280
281 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
282 return -EIO;
283
284 return 0;
285 }
286
287 /*************************************************************************
288 * ACPI device model
289 */
290
291 static void drv_acpi_handle_init(char *name,
292 acpi_handle *handle, acpi_handle parent,
293 char **paths, int num_paths, char **path)
294 {
295 int i;
296 acpi_status status;
297
298 for (i = 0; i < num_paths; i++) {
299 status = acpi_get_handle(parent, paths[i], handle);
300 if (ACPI_SUCCESS(status)) {
301 *path = paths[i];
302 return;
303 }
304 }
305
306 *handle = NULL;
307 }
308
309 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
310 {
311 struct ibm_struct *ibm = data;
312
313 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
314 return;
315
316 ibm->acpi->notify(ibm, event);
317 }
318
319 static int __init setup_acpi_notify(struct ibm_struct *ibm)
320 {
321 acpi_status status;
322 int ret;
323
324 BUG_ON(!ibm->acpi);
325
326 if (!*ibm->acpi->handle)
327 return 0;
328
329 dbg_printk(TPACPI_DBG_INIT,
330 "setting up ACPI notify for %s\n", ibm->name);
331
332 ret = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
333 if (ret < 0) {
334 printk(IBM_ERR "%s device not present\n", ibm->name);
335 return -ENODEV;
336 }
337
338 acpi_driver_data(ibm->acpi->device) = ibm;
339 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
340 IBM_ACPI_EVENT_PREFIX,
341 ibm->name);
342
343 status = acpi_install_notify_handler(*ibm->acpi->handle,
344 ibm->acpi->type, dispatch_acpi_notify, ibm);
345 if (ACPI_FAILURE(status)) {
346 if (status == AE_ALREADY_EXISTS) {
347 printk(IBM_NOTICE "another device driver is already handling %s events\n",
348 ibm->name);
349 } else {
350 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
351 ibm->name, status);
352 }
353 return -ENODEV;
354 }
355 ibm->flags.acpi_notify_installed = 1;
356 return 0;
357 }
358
359 static int __init tpacpi_device_add(struct acpi_device *device)
360 {
361 return 0;
362 }
363
364 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
365 {
366 int ret;
367
368 dbg_printk(TPACPI_DBG_INIT,
369 "registering %s as an ACPI driver\n", ibm->name);
370
371 BUG_ON(!ibm->acpi);
372
373 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
374 if (!ibm->acpi->driver) {
375 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
376 return -ENOMEM;
377 }
378
379 sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
380 ibm->acpi->driver->ids = ibm->acpi->hid;
381 ibm->acpi->driver->ops.add = &tpacpi_device_add;
382
383 ret = acpi_bus_register_driver(ibm->acpi->driver);
384 if (ret < 0) {
385 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
386 ibm->acpi->hid, ret);
387 kfree(ibm->acpi->driver);
388 ibm->acpi->driver = NULL;
389 } else if (!ret)
390 ibm->flags.acpi_driver_registered = 1;
391
392 return ret;
393 }
394
395
396 /****************************************************************************
397 ****************************************************************************
398 *
399 * Procfs Helpers
400 *
401 ****************************************************************************
402 ****************************************************************************/
403
404 static int dispatch_procfs_read(char *page, char **start, off_t off,
405 int count, int *eof, void *data)
406 {
407 struct ibm_struct *ibm = data;
408 int len;
409
410 if (!ibm || !ibm->read)
411 return -EINVAL;
412
413 len = ibm->read(page);
414 if (len < 0)
415 return len;
416
417 if (len <= off + count)
418 *eof = 1;
419 *start = page + off;
420 len -= off;
421 if (len > count)
422 len = count;
423 if (len < 0)
424 len = 0;
425
426 return len;
427 }
428
429 static int dispatch_procfs_write(struct file *file,
430 const char __user * userbuf,
431 unsigned long count, void *data)
432 {
433 struct ibm_struct *ibm = data;
434 char *kernbuf;
435 int ret;
436
437 if (!ibm || !ibm->write)
438 return -EINVAL;
439
440 kernbuf = kmalloc(count + 2, GFP_KERNEL);
441 if (!kernbuf)
442 return -ENOMEM;
443
444 if (copy_from_user(kernbuf, userbuf, count)) {
445 kfree(kernbuf);
446 return -EFAULT;
447 }
448
449 kernbuf[count] = 0;
450 strcat(kernbuf, ",");
451 ret = ibm->write(kernbuf);
452 if (ret == 0)
453 ret = count;
454
455 kfree(kernbuf);
456
457 return ret;
458 }
459
460 static char *next_cmd(char **cmds)
461 {
462 char *start = *cmds;
463 char *end;
464
465 while ((end = strchr(start, ',')) && end == start)
466 start = end + 1;
467
468 if (!end)
469 return NULL;
470
471 *end = 0;
472 *cmds = end + 1;
473 return start;
474 }
475
476
477 /****************************************************************************
478 ****************************************************************************
479 *
480 * Subdrivers
481 *
482 ****************************************************************************
483 ****************************************************************************/
484
485 /*************************************************************************
486 * thinkpad-acpi init subdriver
487 */
488
489 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
490 {
491 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
492 printk(IBM_INFO "%s\n", IBM_URL);
493
494 if (ibm_thinkpad_ec_found)
495 printk(IBM_INFO "ThinkPad EC firmware %s\n",
496 ibm_thinkpad_ec_found);
497
498 return 0;
499 }
500
501 static int thinkpad_acpi_driver_read(char *p)
502 {
503 int len = 0;
504
505 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
506 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
507
508 return len;
509 }
510
511 static struct ibm_struct thinkpad_acpi_driver_data = {
512 .name = "driver",
513 .read = thinkpad_acpi_driver_read,
514 };
515
516 /*************************************************************************
517 * Hotkey subdriver
518 */
519
520 static int hotkey_orig_status;
521 static int hotkey_orig_mask;
522
523 static int __init hotkey_init(struct ibm_init_struct *iibm)
524 {
525 int res;
526
527 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
528
529 IBM_ACPIHANDLE_INIT(hkey);
530
531 /* hotkey not supported on 570 */
532 tp_features.hotkey = hkey_handle != NULL;
533
534 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
535 str_supported(tp_features.hotkey));
536
537 if (tp_features.hotkey) {
538 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
539 A30, R30, R31, T20-22, X20-21, X22-24 */
540 tp_features.hotkey_mask =
541 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
542
543 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
544 str_supported(tp_features.hotkey_mask));
545
546 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
547 if (res)
548 return res;
549 }
550
551 return (tp_features.hotkey)? 0 : 1;
552 }
553
554 static void hotkey_exit(void)
555 {
556 int res;
557
558 if (tp_features.hotkey) {
559 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
560 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
561 if (res)
562 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
563 }
564 }
565
566 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
567 {
568 int hkey;
569
570 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
571 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
572 else {
573 printk(IBM_ERR "unknown hotkey event %d\n", event);
574 acpi_bus_generate_event(ibm->acpi->device, event, 0);
575 }
576 }
577
578 static int hotkey_get(int *status, int *mask)
579 {
580 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
581 return -EIO;
582
583 if (tp_features.hotkey_mask)
584 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
585 return -EIO;
586
587 return 0;
588 }
589
590 static int hotkey_set(int status, int mask)
591 {
592 int i;
593
594 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
595 return -EIO;
596
597 if (tp_features.hotkey_mask)
598 for (i = 0; i < 32; i++) {
599 int bit = ((1 << i) & mask) != 0;
600 if (!acpi_evalf(hkey_handle,
601 NULL, "MHKM", "vdd", i + 1, bit))
602 return -EIO;
603 }
604
605 return 0;
606 }
607
608 static int hotkey_read(char *p)
609 {
610 int res, status, mask;
611 int len = 0;
612
613 if (!tp_features.hotkey) {
614 len += sprintf(p + len, "status:\t\tnot supported\n");
615 return len;
616 }
617
618 res = hotkey_get(&status, &mask);
619 if (res)
620 return res;
621
622 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
623 if (tp_features.hotkey_mask) {
624 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
625 len += sprintf(p + len,
626 "commands:\tenable, disable, reset, <mask>\n");
627 } else {
628 len += sprintf(p + len, "mask:\t\tnot supported\n");
629 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
630 }
631
632 return len;
633 }
634
635 static int hotkey_write(char *buf)
636 {
637 int res, status, mask;
638 char *cmd;
639 int do_cmd = 0;
640
641 if (!tp_features.hotkey)
642 return -ENODEV;
643
644 res = hotkey_get(&status, &mask);
645 if (res)
646 return res;
647
648 while ((cmd = next_cmd(&buf))) {
649 if (strlencmp(cmd, "enable") == 0) {
650 status = 1;
651 } else if (strlencmp(cmd, "disable") == 0) {
652 status = 0;
653 } else if (strlencmp(cmd, "reset") == 0) {
654 status = hotkey_orig_status;
655 mask = hotkey_orig_mask;
656 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
657 /* mask set */
658 } else if (sscanf(cmd, "%x", &mask) == 1) {
659 /* mask set */
660 } else
661 return -EINVAL;
662 do_cmd = 1;
663 }
664
665 if (do_cmd) {
666 res = hotkey_set(status, mask);
667 if (res)
668 return res;
669 }
670
671 return 0;
672 }
673
674 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
675 .hid = IBM_HKEY_HID,
676 .notify = hotkey_notify,
677 .handle = &hkey_handle,
678 .type = ACPI_DEVICE_NOTIFY,
679 };
680
681 static struct ibm_struct hotkey_driver_data = {
682 .name = "hotkey",
683 .read = hotkey_read,
684 .write = hotkey_write,
685 .exit = hotkey_exit,
686 .acpi = &ibm_hotkey_acpidriver,
687 };
688
689 /*************************************************************************
690 * Bluetooth subdriver
691 */
692
693 static int __init bluetooth_init(struct ibm_init_struct *iibm)
694 {
695 int status = 0;
696
697 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
698
699 IBM_ACPIHANDLE_INIT(hkey);
700
701 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
702 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
703 tp_features.bluetooth = hkey_handle &&
704 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
705
706 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
707 str_supported(tp_features.bluetooth),
708 status);
709
710 if (tp_features.bluetooth &&
711 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
712 /* no bluetooth hardware present in system */
713 tp_features.bluetooth = 0;
714 dbg_printk(TPACPI_DBG_INIT,
715 "bluetooth hardware not installed\n");
716 }
717
718 return (tp_features.bluetooth)? 0 : 1;
719 }
720
721 static int bluetooth_get_radiosw(void)
722 {
723 int status;
724
725 if (!tp_features.bluetooth)
726 return -ENODEV;
727
728 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
729 return -EIO;
730
731 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
732 }
733
734 static int bluetooth_set_radiosw(int radio_on)
735 {
736 int status;
737
738 if (!tp_features.bluetooth)
739 return -ENODEV;
740
741 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
742 return -EIO;
743 if (radio_on)
744 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
745 else
746 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
747 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
748 return -EIO;
749
750 return 0;
751 }
752
753 static int bluetooth_read(char *p)
754 {
755 int len = 0;
756 int status = bluetooth_get_radiosw();
757
758 if (!tp_features.bluetooth)
759 len += sprintf(p + len, "status:\t\tnot supported\n");
760 else {
761 len += sprintf(p + len, "status:\t\t%s\n",
762 (status)? "enabled" : "disabled");
763 len += sprintf(p + len, "commands:\tenable, disable\n");
764 }
765
766 return len;
767 }
768
769 static int bluetooth_write(char *buf)
770 {
771 char *cmd;
772
773 if (!tp_features.bluetooth)
774 return -ENODEV;
775
776 while ((cmd = next_cmd(&buf))) {
777 if (strlencmp(cmd, "enable") == 0) {
778 bluetooth_set_radiosw(1);
779 } else if (strlencmp(cmd, "disable") == 0) {
780 bluetooth_set_radiosw(0);
781 } else
782 return -EINVAL;
783 }
784
785 return 0;
786 }
787
788 static struct ibm_struct bluetooth_driver_data = {
789 .name = "bluetooth",
790 .read = bluetooth_read,
791 .write = bluetooth_write,
792 };
793
794 /*************************************************************************
795 * Wan subdriver
796 */
797
798 static int __init wan_init(struct ibm_init_struct *iibm)
799 {
800 int status = 0;
801
802 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
803
804 IBM_ACPIHANDLE_INIT(hkey);
805
806 tp_features.wan = hkey_handle &&
807 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
808
809 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
810 str_supported(tp_features.wan),
811 status);
812
813 if (tp_features.wan &&
814 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
815 /* no wan hardware present in system */
816 tp_features.wan = 0;
817 dbg_printk(TPACPI_DBG_INIT,
818 "wan hardware not installed\n");
819 }
820
821 return (tp_features.wan)? 0 : 1;
822 }
823
824 static int wan_get_radiosw(void)
825 {
826 int status;
827
828 if (!tp_features.wan)
829 return -ENODEV;
830
831 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
832 return -EIO;
833
834 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
835 }
836
837 static int wan_set_radiosw(int radio_on)
838 {
839 int status;
840
841 if (!tp_features.wan)
842 return -ENODEV;
843
844 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
845 return -EIO;
846 if (radio_on)
847 status |= TP_ACPI_WANCARD_RADIOSSW;
848 else
849 status &= ~TP_ACPI_WANCARD_RADIOSSW;
850 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
851 return -EIO;
852
853 return 0;
854 }
855
856 static int wan_read(char *p)
857 {
858 int len = 0;
859 int status = wan_get_radiosw();
860
861 if (!tp_features.wan)
862 len += sprintf(p + len, "status:\t\tnot supported\n");
863 else {
864 len += sprintf(p + len, "status:\t\t%s\n",
865 (status)? "enabled" : "disabled");
866 len += sprintf(p + len, "commands:\tenable, disable\n");
867 }
868
869 return len;
870 }
871
872 static int wan_write(char *buf)
873 {
874 char *cmd;
875
876 if (!tp_features.wan)
877 return -ENODEV;
878
879 while ((cmd = next_cmd(&buf))) {
880 if (strlencmp(cmd, "enable") == 0) {
881 wan_set_radiosw(1);
882 } else if (strlencmp(cmd, "disable") == 0) {
883 wan_set_radiosw(0);
884 } else
885 return -EINVAL;
886 }
887
888 return 0;
889 }
890
891 static struct ibm_struct wan_driver_data = {
892 .name = "wan",
893 .read = wan_read,
894 .write = wan_write,
895 .flags.experimental = 1,
896 };
897
898 /*************************************************************************
899 * Video subdriver
900 */
901
902 static enum video_access_mode video_supported;
903 static int video_orig_autosw;
904
905 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
906 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
907 "\\_SB.PCI0.VID0", /* 770e */
908 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
909 "\\_SB.PCI0.AGP.VID", /* all others */
910 ); /* R30, R31 */
911
912 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
913
914 static int __init video_init(struct ibm_init_struct *iibm)
915 {
916 int ivga;
917
918 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
919
920 IBM_ACPIHANDLE_INIT(vid);
921 IBM_ACPIHANDLE_INIT(vid2);
922
923 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
924 /* G41, assume IVGA doesn't change */
925 vid_handle = vid2_handle;
926
927 if (!vid_handle)
928 /* video switching not supported on R30, R31 */
929 video_supported = TPACPI_VIDEO_NONE;
930 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
931 /* 570 */
932 video_supported = TPACPI_VIDEO_570;
933 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
934 /* 600e/x, 770e, 770x */
935 video_supported = TPACPI_VIDEO_770;
936 else
937 /* all others */
938 video_supported = TPACPI_VIDEO_NEW;
939
940 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
941 str_supported(video_supported != TPACPI_VIDEO_NONE),
942 video_supported);
943
944 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
945 }
946
947 static void video_exit(void)
948 {
949 dbg_printk(TPACPI_DBG_EXIT,
950 "restoring original video autoswitch mode\n");
951 if (video_autosw_set(video_orig_autosw))
952 printk(IBM_ERR "error while trying to restore original "
953 "video autoswitch mode\n");
954 }
955
956 static int video_outputsw_get(void)
957 {
958 int status = 0;
959 int i;
960
961 switch (video_supported) {
962 case TPACPI_VIDEO_570:
963 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
964 TP_ACPI_VIDEO_570_PHSCMD))
965 return -EIO;
966 status = i & TP_ACPI_VIDEO_570_PHSMASK;
967 break;
968 case TPACPI_VIDEO_770:
969 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
970 return -EIO;
971 if (i)
972 status |= TP_ACPI_VIDEO_S_LCD;
973 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
974 return -EIO;
975 if (i)
976 status |= TP_ACPI_VIDEO_S_CRT;
977 break;
978 case TPACPI_VIDEO_NEW:
979 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
980 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
981 return -EIO;
982 if (i)
983 status |= TP_ACPI_VIDEO_S_CRT;
984
985 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
986 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
987 return -EIO;
988 if (i)
989 status |= TP_ACPI_VIDEO_S_LCD;
990 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
991 return -EIO;
992 if (i)
993 status |= TP_ACPI_VIDEO_S_DVI;
994 break;
995 default:
996 return -ENOSYS;
997 }
998
999 return status;
1000 }
1001
1002 static int video_outputsw_set(int status)
1003 {
1004 int autosw;
1005 int res = 0;
1006
1007 switch (video_supported) {
1008 case TPACPI_VIDEO_570:
1009 res = acpi_evalf(NULL, NULL,
1010 "\\_SB.PHS2", "vdd",
1011 TP_ACPI_VIDEO_570_PHS2CMD,
1012 status | TP_ACPI_VIDEO_570_PHS2SET);
1013 break;
1014 case TPACPI_VIDEO_770:
1015 autosw = video_autosw_get();
1016 if (autosw < 0)
1017 return autosw;
1018
1019 res = video_autosw_set(1);
1020 if (res)
1021 return res;
1022 res = acpi_evalf(vid_handle, NULL,
1023 "ASWT", "vdd", status * 0x100, 0);
1024 if (!autosw && video_autosw_set(autosw)) {
1025 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1026 return -EIO;
1027 }
1028 break;
1029 case TPACPI_VIDEO_NEW:
1030 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1031 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1032 break;
1033 default:
1034 return -ENOSYS;
1035 }
1036
1037 return (res)? 0 : -EIO;
1038 }
1039
1040 static int video_autosw_get(void)
1041 {
1042 int autosw = 0;
1043
1044 switch (video_supported) {
1045 case TPACPI_VIDEO_570:
1046 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1047 return -EIO;
1048 break;
1049 case TPACPI_VIDEO_770:
1050 case TPACPI_VIDEO_NEW:
1051 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1052 return -EIO;
1053 break;
1054 default:
1055 return -ENOSYS;
1056 }
1057
1058 return autosw & 1;
1059 }
1060
1061 static int video_autosw_set(int enable)
1062 {
1063 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1064 return -EIO;
1065 return 0;
1066 }
1067
1068 static int video_outputsw_cycle(void)
1069 {
1070 int autosw = video_autosw_get();
1071 int res;
1072
1073 if (autosw < 0)
1074 return autosw;
1075
1076 switch (video_supported) {
1077 case TPACPI_VIDEO_570:
1078 res = video_autosw_set(1);
1079 if (res)
1080 return res;
1081 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1082 break;
1083 case TPACPI_VIDEO_770:
1084 case TPACPI_VIDEO_NEW:
1085 res = video_autosw_set(1);
1086 if (res)
1087 return res;
1088 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1089 break;
1090 default:
1091 return -ENOSYS;
1092 }
1093 if (!autosw && video_autosw_set(autosw)) {
1094 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1095 return -EIO;
1096 }
1097
1098 return (res)? 0 : -EIO;
1099 }
1100
1101 static int video_expand_toggle(void)
1102 {
1103 switch (video_supported) {
1104 case TPACPI_VIDEO_570:
1105 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1106 0 : -EIO;
1107 case TPACPI_VIDEO_770:
1108 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1109 0 : -EIO;
1110 case TPACPI_VIDEO_NEW:
1111 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1112 0 : -EIO;
1113 default:
1114 return -ENOSYS;
1115 }
1116 /* not reached */
1117 }
1118
1119 static int video_read(char *p)
1120 {
1121 int status, autosw;
1122 int len = 0;
1123
1124 if (video_supported == TPACPI_VIDEO_NONE) {
1125 len += sprintf(p + len, "status:\t\tnot supported\n");
1126 return len;
1127 }
1128
1129 status = video_outputsw_get();
1130 if (status < 0)
1131 return status;
1132
1133 autosw = video_autosw_get();
1134 if (autosw < 0)
1135 return autosw;
1136
1137 len += sprintf(p + len, "status:\t\tsupported\n");
1138 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1139 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1140 if (video_supported == TPACPI_VIDEO_NEW)
1141 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1142 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1143 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1144 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1145 if (video_supported == TPACPI_VIDEO_NEW)
1146 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1147 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1148 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1149
1150 return len;
1151 }
1152
1153 static int video_write(char *buf)
1154 {
1155 char *cmd;
1156 int enable, disable, status;
1157 int res;
1158
1159 if (video_supported == TPACPI_VIDEO_NONE)
1160 return -ENODEV;
1161
1162 enable = 0;
1163 disable = 0;
1164
1165 while ((cmd = next_cmd(&buf))) {
1166 if (strlencmp(cmd, "lcd_enable") == 0) {
1167 enable |= TP_ACPI_VIDEO_S_LCD;
1168 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1169 disable |= TP_ACPI_VIDEO_S_LCD;
1170 } else if (strlencmp(cmd, "crt_enable") == 0) {
1171 enable |= TP_ACPI_VIDEO_S_CRT;
1172 } else if (strlencmp(cmd, "crt_disable") == 0) {
1173 disable |= TP_ACPI_VIDEO_S_CRT;
1174 } else if (video_supported == TPACPI_VIDEO_NEW &&
1175 strlencmp(cmd, "dvi_enable") == 0) {
1176 enable |= TP_ACPI_VIDEO_S_DVI;
1177 } else if (video_supported == TPACPI_VIDEO_NEW &&
1178 strlencmp(cmd, "dvi_disable") == 0) {
1179 disable |= TP_ACPI_VIDEO_S_DVI;
1180 } else if (strlencmp(cmd, "auto_enable") == 0) {
1181 res = video_autosw_set(1);
1182 if (res)
1183 return res;
1184 } else if (strlencmp(cmd, "auto_disable") == 0) {
1185 res = video_autosw_set(0);
1186 if (res)
1187 return res;
1188 } else if (strlencmp(cmd, "video_switch") == 0) {
1189 res = video_outputsw_cycle();
1190 if (res)
1191 return res;
1192 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1193 res = video_expand_toggle();
1194 if (res)
1195 return res;
1196 } else
1197 return -EINVAL;
1198 }
1199
1200 if (enable || disable) {
1201 status = video_outputsw_get();
1202 if (status < 0)
1203 return status;
1204 res = video_outputsw_set((status & ~disable) | enable);
1205 if (res)
1206 return res;
1207 }
1208
1209 return 0;
1210 }
1211
1212 static struct ibm_struct video_driver_data = {
1213 .name = "video",
1214 .read = video_read,
1215 .write = video_write,
1216 .exit = video_exit,
1217 };
1218
1219 /*************************************************************************
1220 * Light (thinklight) subdriver
1221 */
1222
1223 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1224 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1225
1226 static int __init light_init(struct ibm_init_struct *iibm)
1227 {
1228 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1229
1230 IBM_ACPIHANDLE_INIT(ledb);
1231 IBM_ACPIHANDLE_INIT(lght);
1232 IBM_ACPIHANDLE_INIT(cmos);
1233
1234 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1235 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1236
1237 if (tp_features.light)
1238 /* light status not supported on
1239 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1240 tp_features.light_status =
1241 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1242
1243 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1244 str_supported(tp_features.light));
1245
1246 return (tp_features.light)? 0 : 1;
1247 }
1248
1249 static int light_read(char *p)
1250 {
1251 int len = 0;
1252 int status = 0;
1253
1254 if (!tp_features.light) {
1255 len += sprintf(p + len, "status:\t\tnot supported\n");
1256 } else if (!tp_features.light_status) {
1257 len += sprintf(p + len, "status:\t\tunknown\n");
1258 len += sprintf(p + len, "commands:\ton, off\n");
1259 } else {
1260 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1261 return -EIO;
1262 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1263 len += sprintf(p + len, "commands:\ton, off\n");
1264 }
1265
1266 return len;
1267 }
1268
1269 static int light_write(char *buf)
1270 {
1271 int cmos_cmd, lght_cmd;
1272 char *cmd;
1273 int success;
1274
1275 if (!tp_features.light)
1276 return -ENODEV;
1277
1278 while ((cmd = next_cmd(&buf))) {
1279 if (strlencmp(cmd, "on") == 0) {
1280 cmos_cmd = 0x0c;
1281 lght_cmd = 1;
1282 } else if (strlencmp(cmd, "off") == 0) {
1283 cmos_cmd = 0x0d;
1284 lght_cmd = 0;
1285 } else
1286 return -EINVAL;
1287
1288 success = cmos_handle ?
1289 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1290 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1291 if (!success)
1292 return -EIO;
1293 }
1294
1295 return 0;
1296 }
1297
1298 static struct ibm_struct light_driver_data = {
1299 .name = "light",
1300 .read = light_read,
1301 .write = light_write,
1302 };
1303
1304 /*************************************************************************
1305 * Dock subdriver
1306 */
1307
1308 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1309
1310 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1311 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1312 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1313 "\\_SB.PCI.ISA.SLCE", /* 570 */
1314 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1315
1316 /* don't list other alternatives as we install a notify handler on the 570 */
1317 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1318
1319 #define dock_docked() (_sta(dock_handle) & 1)
1320
1321 static int __init dock_init(struct ibm_init_struct *iibm)
1322 {
1323 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1324
1325 IBM_ACPIHANDLE_INIT(dock);
1326 IBM_ACPIHANDLE_INIT(pci);
1327
1328 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1329 str_supported(dock_handle != NULL));
1330
1331 return (dock_handle)? 0 : 1;
1332 }
1333
1334 static void dock_notify(struct ibm_struct *ibm, u32 event)
1335 {
1336 int docked = dock_docked();
1337 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1338
1339 if (event == 1 && !pci) /* 570 */
1340 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1341 else if (event == 1 && pci) /* 570 */
1342 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1343 else if (event == 3 && docked)
1344 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1345 else if (event == 3 && !docked)
1346 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
1347 else if (event == 0 && docked)
1348 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1349 else {
1350 printk(IBM_ERR "unknown dock event %d, status %d\n",
1351 event, _sta(dock_handle));
1352 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
1353 }
1354 }
1355
1356 static int dock_read(char *p)
1357 {
1358 int len = 0;
1359 int docked = dock_docked();
1360
1361 if (!dock_handle)
1362 len += sprintf(p + len, "status:\t\tnot supported\n");
1363 else if (!docked)
1364 len += sprintf(p + len, "status:\t\tundocked\n");
1365 else {
1366 len += sprintf(p + len, "status:\t\tdocked\n");
1367 len += sprintf(p + len, "commands:\tdock, undock\n");
1368 }
1369
1370 return len;
1371 }
1372
1373 static int dock_write(char *buf)
1374 {
1375 char *cmd;
1376
1377 if (!dock_docked())
1378 return -ENODEV;
1379
1380 while ((cmd = next_cmd(&buf))) {
1381 if (strlencmp(cmd, "undock") == 0) {
1382 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1383 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1384 return -EIO;
1385 } else if (strlencmp(cmd, "dock") == 0) {
1386 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1387 return -EIO;
1388 } else
1389 return -EINVAL;
1390 }
1391
1392 return 0;
1393 }
1394
1395 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1396 {
1397 .notify = dock_notify,
1398 .handle = &dock_handle,
1399 .type = ACPI_SYSTEM_NOTIFY,
1400 },
1401 {
1402 .hid = IBM_PCI_HID,
1403 .notify = dock_notify,
1404 .handle = &pci_handle,
1405 .type = ACPI_SYSTEM_NOTIFY,
1406 },
1407 };
1408
1409 static struct ibm_struct dock_driver_data[2] = {
1410 {
1411 .name = "dock",
1412 .read = dock_read,
1413 .write = dock_write,
1414 .acpi = &ibm_dock_acpidriver[0],
1415 },
1416 {
1417 .name = "dock",
1418 .acpi = &ibm_dock_acpidriver[1],
1419 },
1420 };
1421
1422 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1423
1424 /*************************************************************************
1425 * Bay subdriver
1426 */
1427
1428 #ifdef CONFIG_THINKPAD_ACPI_BAY
1429 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1430 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1431 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1432 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1433 ); /* A21e, R30, R31 */
1434 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1435 "_EJ0", /* all others */
1436 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1437 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1438 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1439 ); /* all others */
1440 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1441 "_EJ0", /* 770x */
1442 ); /* all others */
1443
1444 static int __init bay_init(struct ibm_init_struct *iibm)
1445 {
1446 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1447
1448 IBM_ACPIHANDLE_INIT(bay);
1449 if (bay_handle)
1450 IBM_ACPIHANDLE_INIT(bay_ej);
1451 IBM_ACPIHANDLE_INIT(bay2);
1452 if (bay2_handle)
1453 IBM_ACPIHANDLE_INIT(bay2_ej);
1454
1455 tp_features.bay_status = bay_handle &&
1456 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1457 tp_features.bay_status2 = bay2_handle &&
1458 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1459
1460 tp_features.bay_eject = bay_handle && bay_ej_handle &&
1461 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1462 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1463 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1464
1465 vdbg_printk(TPACPI_DBG_INIT,
1466 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1467 str_supported(tp_features.bay_status),
1468 str_supported(tp_features.bay_eject),
1469 str_supported(tp_features.bay_status2),
1470 str_supported(tp_features.bay_eject2));
1471
1472 return (tp_features.bay_status || tp_features.bay_eject ||
1473 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1474 }
1475
1476 static void bay_notify(struct ibm_struct *ibm, u32 event)
1477 {
1478 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1479 }
1480
1481 #define bay_occupied(b) (_sta(b##_handle) & 1)
1482
1483 static int bay_read(char *p)
1484 {
1485 int len = 0;
1486 int occupied = bay_occupied(bay);
1487 int occupied2 = bay_occupied(bay2);
1488 int eject, eject2;
1489
1490 len += sprintf(p + len, "status:\t\t%s\n",
1491 tp_features.bay_status ?
1492 (occupied ? "occupied" : "unoccupied") :
1493 "not supported");
1494 if (tp_features.bay_status2)
1495 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1496 "occupied" : "unoccupied");
1497
1498 eject = tp_features.bay_eject && occupied;
1499 eject2 = tp_features.bay_eject2 && occupied2;
1500
1501 if (eject && eject2)
1502 len += sprintf(p + len, "commands:\teject, eject2\n");
1503 else if (eject)
1504 len += sprintf(p + len, "commands:\teject\n");
1505 else if (eject2)
1506 len += sprintf(p + len, "commands:\teject2\n");
1507
1508 return len;
1509 }
1510
1511 static int bay_write(char *buf)
1512 {
1513 char *cmd;
1514
1515 if (!tp_features.bay_eject && !tp_features.bay_eject2)
1516 return -ENODEV;
1517
1518 while ((cmd = next_cmd(&buf))) {
1519 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1520 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1521 return -EIO;
1522 } else if (tp_features.bay_eject2 &&
1523 strlencmp(cmd, "eject2") == 0) {
1524 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1525 return -EIO;
1526 } else
1527 return -EINVAL;
1528 }
1529
1530 return 0;
1531 }
1532
1533 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
1534 .notify = bay_notify,
1535 .handle = &bay_handle,
1536 .type = ACPI_SYSTEM_NOTIFY,
1537 };
1538
1539 static struct ibm_struct bay_driver_data = {
1540 .name = "bay",
1541 .read = bay_read,
1542 .write = bay_write,
1543 .acpi = &ibm_bay_acpidriver,
1544 };
1545
1546 #endif /* CONFIG_THINKPAD_ACPI_BAY */
1547
1548 /*************************************************************************
1549 * CMOS subdriver
1550 */
1551
1552 static int __init cmos_init(struct ibm_init_struct *iibm)
1553 {
1554 vdbg_printk(TPACPI_DBG_INIT,
1555 "initializing cmos commands subdriver\n");
1556
1557 IBM_ACPIHANDLE_INIT(cmos);
1558
1559 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1560 str_supported(cmos_handle != NULL));
1561 return (cmos_handle)? 0 : 1;
1562 }
1563
1564 static int cmos_read(char *p)
1565 {
1566 int len = 0;
1567
1568 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1569 R30, R31, T20-22, X20-21 */
1570 if (!cmos_handle)
1571 len += sprintf(p + len, "status:\t\tnot supported\n");
1572 else {
1573 len += sprintf(p + len, "status:\t\tsupported\n");
1574 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1575 }
1576
1577 return len;
1578 }
1579
1580 static int cmos_write(char *buf)
1581 {
1582 char *cmd;
1583 int cmos_cmd, res;
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 res = issue_thinkpad_cmos_command(cmos_cmd);
1593 if (res)
1594 return res;
1595 }
1596
1597 return 0;
1598 }
1599
1600 static struct ibm_struct cmos_driver_data = {
1601 .name = "cmos",
1602 .read = cmos_read,
1603 .write = cmos_write,
1604 };
1605
1606 /*************************************************************************
1607 * LED subdriver
1608 */
1609
1610 static enum led_access_mode led_supported;
1611
1612 IBM_HANDLE(led, ec, "SLED", /* 570 */
1613 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1614 "LED", /* all others */
1615 ); /* R30, R31 */
1616
1617 static int __init led_init(struct ibm_init_struct *iibm)
1618 {
1619 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
1620
1621 IBM_ACPIHANDLE_INIT(led);
1622
1623 if (!led_handle)
1624 /* led not supported on R30, R31 */
1625 led_supported = TPACPI_LED_NONE;
1626 else if (strlencmp(led_path, "SLED") == 0)
1627 /* 570 */
1628 led_supported = TPACPI_LED_570;
1629 else if (strlencmp(led_path, "SYSL") == 0)
1630 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1631 led_supported = TPACPI_LED_OLD;
1632 else
1633 /* all others */
1634 led_supported = TPACPI_LED_NEW;
1635
1636 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
1637 str_supported(led_supported), led_supported);
1638
1639 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
1640 }
1641
1642 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1643
1644 static int led_read(char *p)
1645 {
1646 int len = 0;
1647
1648 if (!led_supported) {
1649 len += sprintf(p + len, "status:\t\tnot supported\n");
1650 return len;
1651 }
1652 len += sprintf(p + len, "status:\t\tsupported\n");
1653
1654 if (led_supported == TPACPI_LED_570) {
1655 /* 570 */
1656 int i, status;
1657 for (i = 0; i < 8; i++) {
1658 if (!acpi_evalf(ec_handle,
1659 &status, "GLED", "dd", 1 << i))
1660 return -EIO;
1661 len += sprintf(p + len, "%d:\t\t%s\n",
1662 i, led_status(status));
1663 }
1664 }
1665
1666 len += sprintf(p + len, "commands:\t"
1667 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1668
1669 return len;
1670 }
1671
1672 /* off, on, blink */
1673 static const int led_sled_arg1[] = { 0, 1, 3 };
1674 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1675 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1676 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1677
1678 static int led_write(char *buf)
1679 {
1680 char *cmd;
1681 int led, ind, ret;
1682
1683 if (!led_supported)
1684 return -ENODEV;
1685
1686 while ((cmd = next_cmd(&buf))) {
1687 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1688 return -EINVAL;
1689
1690 if (strstr(cmd, "off")) {
1691 ind = 0;
1692 } else if (strstr(cmd, "on")) {
1693 ind = 1;
1694 } else if (strstr(cmd, "blink")) {
1695 ind = 2;
1696 } else
1697 return -EINVAL;
1698
1699 if (led_supported == TPACPI_LED_570) {
1700 /* 570 */
1701 led = 1 << led;
1702 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1703 led, led_sled_arg1[ind]))
1704 return -EIO;
1705 } else if (led_supported == TPACPI_LED_OLD) {
1706 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1707 led = 1 << led;
1708 ret = ec_write(TPACPI_LED_EC_HLMS, led);
1709 if (ret >= 0)
1710 ret =
1711 ec_write(TPACPI_LED_EC_HLBL,
1712 led * led_exp_hlbl[ind]);
1713 if (ret >= 0)
1714 ret =
1715 ec_write(TPACPI_LED_EC_HLCL,
1716 led * led_exp_hlcl[ind]);
1717 if (ret < 0)
1718 return ret;
1719 } else {
1720 /* all others */
1721 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1722 led, led_led_arg1[ind]))
1723 return -EIO;
1724 }
1725 }
1726
1727 return 0;
1728 }
1729
1730 static struct ibm_struct led_driver_data = {
1731 .name = "led",
1732 .read = led_read,
1733 .write = led_write,
1734 };
1735
1736 /*************************************************************************
1737 * Beep subdriver
1738 */
1739
1740 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
1741
1742 static int __init beep_init(struct ibm_init_struct *iibm)
1743 {
1744 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
1745
1746 IBM_ACPIHANDLE_INIT(beep);
1747
1748 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
1749 str_supported(beep_handle != NULL));
1750
1751 return (beep_handle)? 0 : 1;
1752 }
1753
1754 static int beep_read(char *p)
1755 {
1756 int len = 0;
1757
1758 if (!beep_handle)
1759 len += sprintf(p + len, "status:\t\tnot supported\n");
1760 else {
1761 len += sprintf(p + len, "status:\t\tsupported\n");
1762 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1763 }
1764
1765 return len;
1766 }
1767
1768 static int beep_write(char *buf)
1769 {
1770 char *cmd;
1771 int beep_cmd;
1772
1773 if (!beep_handle)
1774 return -ENODEV;
1775
1776 while ((cmd = next_cmd(&buf))) {
1777 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1778 beep_cmd >= 0 && beep_cmd <= 17) {
1779 /* beep_cmd set */
1780 } else
1781 return -EINVAL;
1782 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1783 return -EIO;
1784 }
1785
1786 return 0;
1787 }
1788
1789 static struct ibm_struct beep_driver_data = {
1790 .name = "beep",
1791 .read = beep_read,
1792 .write = beep_write,
1793 };
1794
1795 /*************************************************************************
1796 * Thermal subdriver
1797 */
1798
1799 static enum thermal_access_mode thermal_read_mode;
1800
1801 static int __init thermal_init(struct ibm_init_struct *iibm)
1802 {
1803 u8 t, ta1, ta2;
1804 int i;
1805 int acpi_tmp7;
1806
1807 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
1808
1809 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1810
1811 if (ibm_thinkpad_ec_found && experimental) {
1812 /*
1813 * Direct EC access mode: sensors at registers
1814 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1815 * non-implemented, thermal sensors return 0x80 when
1816 * not available
1817 */
1818
1819 ta1 = ta2 = 0;
1820 for (i = 0; i < 8; i++) {
1821 if (likely(acpi_ec_read(0x78 + i, &t))) {
1822 ta1 |= t;
1823 } else {
1824 ta1 = 0;
1825 break;
1826 }
1827 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1828 ta2 |= t;
1829 } else {
1830 ta1 = 0;
1831 break;
1832 }
1833 }
1834 if (ta1 == 0) {
1835 /* This is sheer paranoia, but we handle it anyway */
1836 if (acpi_tmp7) {
1837 printk(IBM_ERR
1838 "ThinkPad ACPI EC access misbehaving, "
1839 "falling back to ACPI TMPx access mode\n");
1840 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1841 } else {
1842 printk(IBM_ERR
1843 "ThinkPad ACPI EC access misbehaving, "
1844 "disabling thermal sensors access\n");
1845 thermal_read_mode = TPACPI_THERMAL_NONE;
1846 }
1847 } else {
1848 thermal_read_mode =
1849 (ta2 != 0) ?
1850 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
1851 }
1852 } else if (acpi_tmp7) {
1853 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1854 /* 600e/x, 770e, 770x */
1855 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
1856 } else {
1857 /* Standard ACPI TMPx access, max 8 sensors */
1858 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1859 }
1860 } else {
1861 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1862 thermal_read_mode = TPACPI_THERMAL_NONE;
1863 }
1864
1865 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
1866 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
1867 thermal_read_mode);
1868
1869 return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
1870 }
1871
1872 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1873 {
1874 int i, t;
1875 s8 tmp;
1876 char tmpi[] = "TMPi";
1877
1878 if (!s)
1879 return -EINVAL;
1880
1881 switch (thermal_read_mode) {
1882 #if TPACPI_MAX_THERMAL_SENSORS >= 16
1883 case TPACPI_THERMAL_TPEC_16:
1884 for (i = 0; i < 8; i++) {
1885 if (!acpi_ec_read(0xC0 + i, &tmp))
1886 return -EIO;
1887 s->temp[i + 8] = tmp * 1000;
1888 }
1889 /* fallthrough */
1890 #endif
1891 case TPACPI_THERMAL_TPEC_8:
1892 for (i = 0; i < 8; i++) {
1893 if (!acpi_ec_read(0x78 + i, &tmp))
1894 return -EIO;
1895 s->temp[i] = tmp * 1000;
1896 }
1897 return (thermal_read_mode == TPACPI_THERMAL_TPEC_16) ? 16 : 8;
1898
1899 case TPACPI_THERMAL_ACPI_UPDT:
1900 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1901 return -EIO;
1902 for (i = 0; i < 8; i++) {
1903 tmpi[3] = '0' + i;
1904 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1905 return -EIO;
1906 s->temp[i] = (t - 2732) * 100;
1907 }
1908 return 8;
1909
1910 case TPACPI_THERMAL_ACPI_TMP07:
1911 for (i = 0; i < 8; i++) {
1912 tmpi[3] = '0' + i;
1913 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1914 return -EIO;
1915 s->temp[i] = t * 1000;
1916 }
1917 return 8;
1918
1919 case TPACPI_THERMAL_NONE:
1920 default:
1921 return 0;
1922 }
1923 }
1924
1925 static int thermal_read(char *p)
1926 {
1927 int len = 0;
1928 int n, i;
1929 struct ibm_thermal_sensors_struct t;
1930
1931 n = thermal_get_sensors(&t);
1932 if (unlikely(n < 0))
1933 return n;
1934
1935 len += sprintf(p + len, "temperatures:\t");
1936
1937 if (n > 0) {
1938 for (i = 0; i < (n - 1); i++)
1939 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1940 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1941 } else
1942 len += sprintf(p + len, "not supported\n");
1943
1944 return len;
1945 }
1946
1947 static struct ibm_struct thermal_driver_data = {
1948 .name = "thermal",
1949 .read = thermal_read,
1950 };
1951
1952 /*************************************************************************
1953 * EC Dump subdriver
1954 */
1955
1956 static u8 ecdump_regs[256];
1957
1958 static int ecdump_read(char *p)
1959 {
1960 int len = 0;
1961 int i, j;
1962 u8 v;
1963
1964 len += sprintf(p + len, "EC "
1965 " +00 +01 +02 +03 +04 +05 +06 +07"
1966 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1967 for (i = 0; i < 256; i += 16) {
1968 len += sprintf(p + len, "EC 0x%02x:", i);
1969 for (j = 0; j < 16; j++) {
1970 if (!acpi_ec_read(i + j, &v))
1971 break;
1972 if (v != ecdump_regs[i + j])
1973 len += sprintf(p + len, " *%02x", v);
1974 else
1975 len += sprintf(p + len, " %02x", v);
1976 ecdump_regs[i + j] = v;
1977 }
1978 len += sprintf(p + len, "\n");
1979 if (j != 16)
1980 break;
1981 }
1982
1983 /* These are way too dangerous to advertise openly... */
1984 #if 0
1985 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1986 " (<offset> is 00-ff, <value> is 00-ff)\n");
1987 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1988 " (<offset> is 00-ff, <value> is 0-255)\n");
1989 #endif
1990 return len;
1991 }
1992
1993 static int ecdump_write(char *buf)
1994 {
1995 char *cmd;
1996 int i, v;
1997
1998 while ((cmd = next_cmd(&buf))) {
1999 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2000 /* i and v set */
2001 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2002 /* i and v set */
2003 } else
2004 return -EINVAL;
2005 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2006 if (!acpi_ec_write(i, v))
2007 return -EIO;
2008 } else
2009 return -EINVAL;
2010 }
2011
2012 return 0;
2013 }
2014
2015 static struct ibm_struct ecdump_driver_data = {
2016 .name = "ecdump",
2017 .read = ecdump_read,
2018 .write = ecdump_write,
2019 .flags.experimental = 1,
2020 };
2021
2022 /*************************************************************************
2023 * Backlight/brightness subdriver
2024 */
2025
2026 static struct backlight_device *ibm_backlight_device = NULL;
2027
2028 static struct backlight_ops ibm_backlight_data = {
2029 .get_brightness = brightness_get,
2030 .update_status = brightness_update_status,
2031 };
2032
2033 static int __init brightness_init(struct ibm_init_struct *iibm)
2034 {
2035 int b;
2036
2037 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2038
2039 b = brightness_get(NULL);
2040 if (b < 0)
2041 return b;
2042
2043 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
2044 &ibm_backlight_data);
2045 if (IS_ERR(ibm_backlight_device)) {
2046 printk(IBM_ERR "Could not register backlight device\n");
2047 return PTR_ERR(ibm_backlight_device);
2048 }
2049 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2050
2051 ibm_backlight_device->props.max_brightness = 7;
2052 ibm_backlight_device->props.brightness = b;
2053 backlight_update_status(ibm_backlight_device);
2054
2055 return 0;
2056 }
2057
2058 static void brightness_exit(void)
2059 {
2060 if (ibm_backlight_device) {
2061 vdbg_printk(TPACPI_DBG_EXIT,
2062 "calling backlight_device_unregister()\n");
2063 backlight_device_unregister(ibm_backlight_device);
2064 ibm_backlight_device = NULL;
2065 }
2066 }
2067
2068 static int brightness_update_status(struct backlight_device *bd)
2069 {
2070 return brightness_set(
2071 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2072 bd->props.power == FB_BLANK_UNBLANK) ?
2073 bd->props.brightness : 0);
2074 }
2075
2076 static int brightness_get(struct backlight_device *bd)
2077 {
2078 u8 level;
2079 if (!acpi_ec_read(brightness_offset, &level))
2080 return -EIO;
2081
2082 level &= 0x7;
2083
2084 return level;
2085 }
2086
2087 static int brightness_set(int value)
2088 {
2089 int cmos_cmd, inc, i;
2090 int current_value = brightness_get(NULL);
2091
2092 value &= 7;
2093
2094 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2095 inc = value > current_value ? 1 : -1;
2096 for (i = current_value; i != value; i += inc) {
2097 if (issue_thinkpad_cmos_command(cmos_cmd))
2098 return -EIO;
2099 if (!acpi_ec_write(brightness_offset, i + inc))
2100 return -EIO;
2101 }
2102
2103 return 0;
2104 }
2105
2106 static int brightness_read(char *p)
2107 {
2108 int len = 0;
2109 int level;
2110
2111 if ((level = brightness_get(NULL)) < 0) {
2112 len += sprintf(p + len, "level:\t\tunreadable\n");
2113 } else {
2114 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2115 len += sprintf(p + len, "commands:\tup, down\n");
2116 len += sprintf(p + len, "commands:\tlevel <level>"
2117 " (<level> is 0-7)\n");
2118 }
2119
2120 return len;
2121 }
2122
2123 static int brightness_write(char *buf)
2124 {
2125 int level;
2126 int new_level;
2127 char *cmd;
2128
2129 while ((cmd = next_cmd(&buf))) {
2130 if ((level = brightness_get(NULL)) < 0)
2131 return level;
2132 level &= 7;
2133
2134 if (strlencmp(cmd, "up") == 0) {
2135 new_level = level == 7 ? 7 : level + 1;
2136 } else if (strlencmp(cmd, "down") == 0) {
2137 new_level = level == 0 ? 0 : level - 1;
2138 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2139 new_level >= 0 && new_level <= 7) {
2140 /* new_level set */
2141 } else
2142 return -EINVAL;
2143
2144 brightness_set(new_level);
2145 }
2146
2147 return 0;
2148 }
2149
2150 static struct ibm_struct brightness_driver_data = {
2151 .name = "brightness",
2152 .read = brightness_read,
2153 .write = brightness_write,
2154 .exit = brightness_exit,
2155 };
2156
2157 /*************************************************************************
2158 * Volume subdriver
2159 */
2160
2161 static int volume_read(char *p)
2162 {
2163 int len = 0;
2164 u8 level;
2165
2166 if (!acpi_ec_read(volume_offset, &level)) {
2167 len += sprintf(p + len, "level:\t\tunreadable\n");
2168 } else {
2169 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2170 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2171 len += sprintf(p + len, "commands:\tup, down, mute\n");
2172 len += sprintf(p + len, "commands:\tlevel <level>"
2173 " (<level> is 0-15)\n");
2174 }
2175
2176 return len;
2177 }
2178
2179 static int volume_write(char *buf)
2180 {
2181 int cmos_cmd, inc, i;
2182 u8 level, mute;
2183 int new_level, new_mute;
2184 char *cmd;
2185
2186 while ((cmd = next_cmd(&buf))) {
2187 if (!acpi_ec_read(volume_offset, &level))
2188 return -EIO;
2189 new_mute = mute = level & 0x40;
2190 new_level = level = level & 0xf;
2191
2192 if (strlencmp(cmd, "up") == 0) {
2193 if (mute)
2194 new_mute = 0;
2195 else
2196 new_level = level == 15 ? 15 : level + 1;
2197 } else if (strlencmp(cmd, "down") == 0) {
2198 if (mute)
2199 new_mute = 0;
2200 else
2201 new_level = level == 0 ? 0 : level - 1;
2202 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2203 new_level >= 0 && new_level <= 15) {
2204 /* new_level set */
2205 } else if (strlencmp(cmd, "mute") == 0) {
2206 new_mute = 0x40;
2207 } else
2208 return -EINVAL;
2209
2210 if (new_level != level) { /* mute doesn't change */
2211 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2212 inc = new_level > level ? 1 : -1;
2213
2214 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2215 !acpi_ec_write(volume_offset, level)))
2216 return -EIO;
2217
2218 for (i = level; i != new_level; i += inc)
2219 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2220 !acpi_ec_write(volume_offset, i + inc))
2221 return -EIO;
2222
2223 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2224 !acpi_ec_write(volume_offset,
2225 new_level + mute)))
2226 return -EIO;
2227 }
2228
2229 if (new_mute != mute) { /* level doesn't change */
2230 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2231
2232 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2233 !acpi_ec_write(volume_offset, level + new_mute))
2234 return -EIO;
2235 }
2236 }
2237
2238 return 0;
2239 }
2240
2241 static struct ibm_struct volume_driver_data = {
2242 .name = "volume",
2243 .read = volume_read,
2244 .write = volume_write,
2245 };
2246
2247 /*************************************************************************
2248 * Fan subdriver
2249 */
2250
2251 /*
2252 * FAN ACCESS MODES
2253 *
2254 * TPACPI_FAN_RD_ACPI_GFAN:
2255 * ACPI GFAN method: returns fan level
2256 *
2257 * see TPACPI_FAN_WR_ACPI_SFAN
2258 * EC 0x2f (HFSP) not available if GFAN exists
2259 *
2260 * TPACPI_FAN_WR_ACPI_SFAN:
2261 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2262 *
2263 * EC 0x2f (HFSP) might be available *for reading*, but do not use
2264 * it for writing.
2265 *
2266 * TPACPI_FAN_WR_TPEC:
2267 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
2268 * Supported on almost all ThinkPads
2269 *
2270 * Fan speed changes of any sort (including those caused by the
2271 * disengaged mode) are usually done slowly by the firmware as the
2272 * maximum ammount of fan duty cycle change per second seems to be
2273 * limited.
2274 *
2275 * Reading is not available if GFAN exists.
2276 * Writing is not available if SFAN exists.
2277 *
2278 * Bits
2279 * 7 automatic mode engaged;
2280 * (default operation mode of the ThinkPad)
2281 * fan level is ignored in this mode.
2282 * 6 full speed mode (takes precedence over bit 7);
2283 * not available on all thinkpads. May disable
2284 * the tachometer while the fan controller ramps up
2285 * the speed (which can take up to a few *minutes*).
2286 * Speeds up fan to 100% duty-cycle, which is far above
2287 * the standard RPM levels. It is not impossible that
2288 * it could cause hardware damage.
2289 * 5-3 unused in some models. Extra bits for fan level
2290 * in others, but still useless as all values above
2291 * 7 map to the same speed as level 7 in these models.
2292 * 2-0 fan level (0..7 usually)
2293 * 0x00 = stop
2294 * 0x07 = max (set when temperatures critical)
2295 * Some ThinkPads may have other levels, see
2296 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2297 *
2298 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2299 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2300 * does so, its initial value is meaningless (0x07).
2301 *
2302 * For firmware bugs, refer to:
2303 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2304 *
2305 * ----
2306 *
2307 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2308 * Main fan tachometer reading (in RPM)
2309 *
2310 * This register is present on all ThinkPads with a new-style EC, and
2311 * it is known not to be present on the A21m/e, and T22, as there is
2312 * something else in offset 0x84 according to the ACPI DSDT. Other
2313 * ThinkPads from this same time period (and earlier) probably lack the
2314 * tachometer as well.
2315 *
2316 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2317 * was never fixed by IBM to report the EC firmware version string
2318 * probably support the tachometer (like the early X models), so
2319 * detecting it is quite hard. We need more data to know for sure.
2320 *
2321 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2322 * might result.
2323 *
2324 * FIRMWARE BUG: may go stale while the EC is switching to full speed
2325 * mode.
2326 *
2327 * For firmware bugs, refer to:
2328 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2329 *
2330 * TPACPI_FAN_WR_ACPI_FANS:
2331 * ThinkPad X31, X40, X41. Not available in the X60.
2332 *
2333 * FANS ACPI handle: takes three arguments: low speed, medium speed,
2334 * high speed. ACPI DSDT seems to map these three speeds to levels
2335 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2336 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2337 *
2338 * The speeds are stored on handles
2339 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2340 *
2341 * There are three default speed sets, acessible as handles:
2342 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2343 *
2344 * ACPI DSDT switches which set is in use depending on various
2345 * factors.
2346 *
2347 * TPACPI_FAN_WR_TPEC is also available and should be used to
2348 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
2349 * but the ACPI tables just mention level 7.
2350 */
2351
2352 static enum fan_status_access_mode fan_status_access_mode;
2353 static enum fan_control_access_mode fan_control_access_mode;
2354 static enum fan_control_commands fan_control_commands;
2355
2356 static u8 fan_control_initial_status;
2357
2358 static void fan_watchdog_fire(struct work_struct *ignored);
2359 static int fan_watchdog_maxinterval;
2360 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
2361
2362 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
2363 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
2364 "\\FSPD", /* 600e/x, 770e, 770x */
2365 ); /* all others */
2366 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
2367 "JFNS", /* 770x-JL */
2368 ); /* all others */
2369
2370 static int __init fan_init(struct ibm_init_struct *iibm)
2371 {
2372 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
2373
2374 fan_status_access_mode = TPACPI_FAN_NONE;
2375 fan_control_access_mode = TPACPI_FAN_WR_NONE;
2376 fan_control_commands = 0;
2377 fan_watchdog_maxinterval = 0;
2378 tp_features.fan_ctrl_status_undef = 0;
2379
2380 IBM_ACPIHANDLE_INIT(fans);
2381 IBM_ACPIHANDLE_INIT(gfan);
2382 IBM_ACPIHANDLE_INIT(sfan);
2383
2384 if (gfan_handle) {
2385 /* 570, 600e/x, 770e, 770x */
2386 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
2387 } else {
2388 /* all other ThinkPads: note that even old-style
2389 * ThinkPad ECs supports the fan control register */
2390 if (likely(acpi_ec_read(fan_status_offset,
2391 &fan_control_initial_status))) {
2392 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
2393
2394 /* In some ThinkPads, neither the EC nor the ACPI
2395 * DSDT initialize the fan status, and it ends up
2396 * being set to 0x07 when it *could* be either
2397 * 0x07 or 0x80.
2398 *
2399 * Enable for TP-1Y (T43), TP-78 (R51e),
2400 * TP-76 (R52), TP-70 (T43, R52), which are known
2401 * to be buggy. */
2402 if (fan_control_initial_status == 0x07 &&
2403 ibm_thinkpad_ec_found &&
2404 ((ibm_thinkpad_ec_found[0] == '1' &&
2405 ibm_thinkpad_ec_found[1] == 'Y') ||
2406 (ibm_thinkpad_ec_found[0] == '7' &&
2407 (ibm_thinkpad_ec_found[1] == '6' ||
2408 ibm_thinkpad_ec_found[1] == '8' ||
2409 ibm_thinkpad_ec_found[1] == '0'))
2410 )) {
2411 printk(IBM_NOTICE
2412 "fan_init: initial fan status is "
2413 "unknown, assuming it is in auto "
2414 "mode\n");
2415 tp_features.fan_ctrl_status_undef = 1;
2416 }
2417 } else {
2418 printk(IBM_ERR
2419 "ThinkPad ACPI EC access misbehaving, "
2420 "fan status and control unavailable\n");
2421 return 1;
2422 }
2423 }
2424
2425 if (sfan_handle) {
2426 /* 570, 770x-JL */
2427 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
2428 fan_control_commands |=
2429 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
2430 } else {
2431 if (!gfan_handle) {
2432 /* gfan without sfan means no fan control */
2433 /* all other models implement TP EC 0x2f control */
2434
2435 if (fans_handle) {
2436 /* X31, X40, X41 */
2437 fan_control_access_mode =
2438 TPACPI_FAN_WR_ACPI_FANS;
2439 fan_control_commands |=
2440 TPACPI_FAN_CMD_SPEED |
2441 TPACPI_FAN_CMD_LEVEL |
2442 TPACPI_FAN_CMD_ENABLE;
2443 } else {
2444 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
2445 fan_control_commands |=
2446 TPACPI_FAN_CMD_LEVEL |
2447 TPACPI_FAN_CMD_ENABLE;
2448 }
2449 }
2450 }
2451
2452 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
2453 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
2454 fan_control_access_mode != TPACPI_FAN_WR_NONE),
2455 fan_status_access_mode, fan_control_access_mode);
2456
2457 return (fan_status_access_mode != TPACPI_FAN_NONE ||
2458 fan_control_access_mode != TPACPI_FAN_WR_NONE)?
2459 0 : 1;
2460 }
2461
2462 static int fan_get_status(u8 *status)
2463 {
2464 u8 s;
2465
2466 /* TODO:
2467 * Add TPACPI_FAN_RD_ACPI_FANS ? */
2468
2469 switch (fan_status_access_mode) {
2470 case TPACPI_FAN_RD_ACPI_GFAN:
2471 /* 570, 600e/x, 770e, 770x */
2472
2473 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
2474 return -EIO;
2475
2476 if (likely(status))
2477 *status = s & 0x07;
2478
2479 break;
2480
2481 case TPACPI_FAN_RD_TPEC:
2482 /* all except 570, 600e/x, 770e, 770x */
2483 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
2484 return -EIO;
2485
2486 if (likely(status))
2487 *status = s;
2488
2489 break;
2490
2491 default:
2492 return -ENXIO;
2493 }
2494
2495 return 0;
2496 }
2497
2498 static void fan_exit(void)
2499 {
2500 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending watchdogs\n");
2501 cancel_delayed_work(&fan_watchdog_task);
2502 flush_scheduled_work();
2503 }
2504
2505 static int fan_get_speed(unsigned int *speed)
2506 {
2507 u8 hi, lo;
2508
2509 switch (fan_status_access_mode) {
2510 case TPACPI_FAN_RD_TPEC:
2511 /* all except 570, 600e/x, 770e, 770x */
2512 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
2513 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
2514 return -EIO;
2515
2516 if (likely(speed))
2517 *speed = (hi << 8) | lo;
2518
2519 break;
2520
2521 default:
2522 return -ENXIO;
2523 }
2524
2525 return 0;
2526 }
2527
2528 static void fan_watchdog_fire(struct work_struct *ignored)
2529 {
2530 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2531 if (fan_set_enable()) {
2532 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2533 /* reschedule for later */
2534 fan_watchdog_reset();
2535 }
2536 }
2537
2538 static void fan_watchdog_reset(void)
2539 {
2540 static int fan_watchdog_active = 0;
2541
2542 if (fan_watchdog_active)
2543 cancel_delayed_work(&fan_watchdog_task);
2544
2545 if (fan_watchdog_maxinterval > 0) {
2546 fan_watchdog_active = 1;
2547 if (!schedule_delayed_work(&fan_watchdog_task,
2548 msecs_to_jiffies(fan_watchdog_maxinterval
2549 * 1000))) {
2550 printk(IBM_ERR "failed to schedule the fan watchdog, "
2551 "watchdog will not trigger\n");
2552 }
2553 } else
2554 fan_watchdog_active = 0;
2555 }
2556
2557 static int fan_set_level(int level)
2558 {
2559 switch (fan_control_access_mode) {
2560 case TPACPI_FAN_WR_ACPI_SFAN:
2561 if (level >= 0 && level <= 7) {
2562 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2563 return -EIO;
2564 } else
2565 return -EINVAL;
2566 break;
2567
2568 case TPACPI_FAN_WR_ACPI_FANS:
2569 case TPACPI_FAN_WR_TPEC:
2570 if ((level != TP_EC_FAN_AUTO) &&
2571 (level != TP_EC_FAN_FULLSPEED) &&
2572 ((level < 0) || (level > 7)))
2573 return -EINVAL;
2574
2575 if (!acpi_ec_write(fan_status_offset, level))
2576 return -EIO;
2577 else
2578 tp_features.fan_ctrl_status_undef = 0;
2579 break;
2580
2581 default:
2582 return -ENXIO;
2583 }
2584 return 0;
2585 }
2586
2587 static int fan_set_enable(void)
2588 {
2589 u8 s;
2590 int rc;
2591
2592 switch (fan_control_access_mode) {
2593 case TPACPI_FAN_WR_ACPI_FANS:
2594 case TPACPI_FAN_WR_TPEC:
2595 if ((rc = fan_get_status(&s)) < 0)
2596 return rc;
2597
2598 /* Don't go out of emergency fan mode */
2599 if (s != 7)
2600 s = TP_EC_FAN_AUTO;
2601
2602 if (!acpi_ec_write(fan_status_offset, s))
2603 return -EIO;
2604 else
2605 tp_features.fan_ctrl_status_undef = 0;
2606 break;
2607
2608 case TPACPI_FAN_WR_ACPI_SFAN:
2609 if ((rc = fan_get_status(&s)) < 0)
2610 return rc;
2611
2612 s &= 0x07;
2613
2614 /* Set fan to at least level 4 */
2615 if (s < 4)
2616 s = 4;
2617
2618 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2619 return -EIO;
2620 break;
2621
2622 default:
2623 return -ENXIO;
2624 }
2625 return 0;
2626 }
2627
2628 static int fan_set_disable(void)
2629 {
2630 switch (fan_control_access_mode) {
2631 case TPACPI_FAN_WR_ACPI_FANS:
2632 case TPACPI_FAN_WR_TPEC:
2633 if (!acpi_ec_write(fan_status_offset, 0x00))
2634 return -EIO;
2635 else
2636 tp_features.fan_ctrl_status_undef = 0;
2637 break;
2638
2639 case TPACPI_FAN_WR_ACPI_SFAN:
2640 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2641 return -EIO;
2642 break;
2643
2644 default:
2645 return -ENXIO;
2646 }
2647 return 0;
2648 }
2649
2650 static int fan_set_speed(int speed)
2651 {
2652 switch (fan_control_access_mode) {
2653 case TPACPI_FAN_WR_ACPI_FANS:
2654 if (speed >= 0 && speed <= 65535) {
2655 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2656 speed, speed, speed))
2657 return -EIO;
2658 } else
2659 return -EINVAL;
2660 break;
2661
2662 default:
2663 return -ENXIO;
2664 }
2665 return 0;
2666 }
2667
2668 static int fan_read(char *p)
2669 {
2670 int len = 0;
2671 int rc;
2672 u8 status;
2673 unsigned int speed = 0;
2674
2675 switch (fan_status_access_mode) {
2676 case TPACPI_FAN_RD_ACPI_GFAN:
2677 /* 570, 600e/x, 770e, 770x */
2678 if ((rc = fan_get_status(&status)) < 0)
2679 return rc;
2680
2681 len += sprintf(p + len, "status:\t\t%s\n"
2682 "level:\t\t%d\n",
2683 (status != 0) ? "enabled" : "disabled", status);
2684 break;
2685
2686 case TPACPI_FAN_RD_TPEC:
2687 /* all except 570, 600e/x, 770e, 770x */
2688 if ((rc = fan_get_status(&status)) < 0)
2689 return rc;
2690
2691 if (unlikely(tp_features.fan_ctrl_status_undef)) {
2692 if (status != fan_control_initial_status)
2693 tp_features.fan_ctrl_status_undef = 0;
2694 else
2695 /* Return most likely status. In fact, it
2696 * might be the only possible status */
2697 status = TP_EC_FAN_AUTO;
2698 }
2699
2700 len += sprintf(p + len, "status:\t\t%s\n",
2701 (status != 0) ? "enabled" : "disabled");
2702
2703 if ((rc = fan_get_speed(&speed)) < 0)
2704 return rc;
2705
2706 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2707
2708 if (status & TP_EC_FAN_FULLSPEED)
2709 /* Disengaged mode takes precedence */
2710 len += sprintf(p + len, "level:\t\tdisengaged\n");
2711 else if (status & TP_EC_FAN_AUTO)
2712 len += sprintf(p + len, "level:\t\tauto\n");
2713 else
2714 len += sprintf(p + len, "level:\t\t%d\n", status);
2715 break;
2716
2717 case TPACPI_FAN_NONE:
2718 default:
2719 len += sprintf(p + len, "status:\t\tnot supported\n");
2720 }
2721
2722 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
2723 len += sprintf(p + len, "commands:\tlevel <level>");
2724
2725 switch (fan_control_access_mode) {
2726 case TPACPI_FAN_WR_ACPI_SFAN:
2727 len += sprintf(p + len, " (<level> is 0-7)\n");
2728 break;
2729
2730 default:
2731 len += sprintf(p + len, " (<level> is 0-7, "
2732 "auto, disengaged)\n");
2733 break;
2734 }
2735 }
2736
2737 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
2738 len += sprintf(p + len, "commands:\tenable, disable\n"
2739 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2740 "1-120 (seconds))\n");
2741
2742 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
2743 len += sprintf(p + len, "commands:\tspeed <speed>"
2744 " (<speed> is 0-65535)\n");
2745
2746 return len;
2747 }
2748
2749 static int fan_write_cmd_level(const char *cmd, int *rc)
2750 {
2751 int level;
2752
2753 if (strlencmp(cmd, "level auto") == 0)
2754 level = TP_EC_FAN_AUTO;
2755 else if (strlencmp(cmd, "level disengaged") == 0)
2756 level = TP_EC_FAN_FULLSPEED;
2757 else if (sscanf(cmd, "level %d", &level) != 1)
2758 return 0;
2759
2760 if ((*rc = fan_set_level(level)) == -ENXIO)
2761 printk(IBM_ERR "level command accepted for unsupported "
2762 "access mode %d", fan_control_access_mode);
2763
2764 return 1;
2765 }
2766
2767 static int fan_write_cmd_enable(const char *cmd, int *rc)
2768 {
2769 if (strlencmp(cmd, "enable") != 0)
2770 return 0;
2771
2772 if ((*rc = fan_set_enable()) == -ENXIO)
2773 printk(IBM_ERR "enable command accepted for unsupported "
2774 "access mode %d", fan_control_access_mode);
2775
2776 return 1;
2777 }
2778
2779 static int fan_write_cmd_disable(const char *cmd, int *rc)
2780 {
2781 if (strlencmp(cmd, "disable") != 0)
2782 return 0;
2783
2784 if ((*rc = fan_set_disable()) == -ENXIO)
2785 printk(IBM_ERR "disable command accepted for unsupported "
2786 "access mode %d", fan_control_access_mode);
2787
2788 return 1;
2789 }
2790
2791 static int fan_write_cmd_speed(const char *cmd, int *rc)
2792 {
2793 int speed;
2794
2795 /* TODO:
2796 * Support speed <low> <medium> <high> ? */
2797
2798 if (sscanf(cmd, "speed %d", &speed) != 1)
2799 return 0;
2800
2801 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2802 printk(IBM_ERR "speed command accepted for unsupported "
2803 "access mode %d", fan_control_access_mode);
2804
2805 return 1;
2806 }
2807
2808 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2809 {
2810 int interval;
2811
2812 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2813 return 0;
2814
2815 if (interval < 0 || interval > 120)
2816 *rc = -EINVAL;
2817 else
2818 fan_watchdog_maxinterval = interval;
2819
2820 return 1;
2821 }
2822
2823 static int fan_write(char *buf)
2824 {
2825 char *cmd;
2826 int rc = 0;
2827
2828 while (!rc && (cmd = next_cmd(&buf))) {
2829 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
2830 fan_write_cmd_level(cmd, &rc)) &&
2831 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
2832 (fan_write_cmd_enable(cmd, &rc) ||
2833 fan_write_cmd_disable(cmd, &rc) ||
2834 fan_write_cmd_watchdog(cmd, &rc))) &&
2835 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
2836 fan_write_cmd_speed(cmd, &rc))
2837 )
2838 rc = -EINVAL;
2839 else if (!rc)
2840 fan_watchdog_reset();
2841 }
2842
2843 return rc;
2844 }
2845
2846 static struct ibm_struct fan_driver_data = {
2847 .name = "fan",
2848 .read = fan_read,
2849 .write = fan_write,
2850 .exit = fan_exit,
2851 .flags.experimental = 1,
2852 };
2853
2854 /****************************************************************************
2855 ****************************************************************************
2856 *
2857 * Infrastructure
2858 *
2859 ****************************************************************************
2860 ****************************************************************************/
2861
2862 /* /proc support */
2863 static struct proc_dir_entry *proc_dir = NULL;
2864
2865 /* Subdriver registry */
2866 static LIST_HEAD(tpacpi_all_drivers);
2867
2868
2869 /*
2870 * Module and infrastructure proble, init and exit handling
2871 */
2872
2873 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
2874 static const char * __init str_supported(int is_supported)
2875 {
2876 static char text_unsupported[] __initdata = "not supported";
2877
2878 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
2879 }
2880 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
2881
2882 static int __init ibm_init(struct ibm_init_struct *iibm)
2883 {
2884 int ret;
2885 struct ibm_struct *ibm = iibm->data;
2886 struct proc_dir_entry *entry;
2887
2888 BUG_ON(ibm == NULL);
2889
2890 INIT_LIST_HEAD(&ibm->all_drivers);
2891
2892 if (ibm->flags.experimental && !experimental)
2893 return 0;
2894
2895 dbg_printk(TPACPI_DBG_INIT,
2896 "probing for %s\n", ibm->name);
2897
2898 if (iibm->init) {
2899 ret = iibm->init(iibm);
2900 if (ret > 0)
2901 return 0; /* probe failed */
2902 if (ret)
2903 return ret;
2904
2905 ibm->flags.init_called = 1;
2906 }
2907
2908 if (ibm->acpi) {
2909 if (ibm->acpi->hid) {
2910 ret = register_tpacpi_subdriver(ibm);
2911 if (ret)
2912 goto err_out;
2913 }
2914
2915 if (ibm->acpi->notify) {
2916 ret = setup_acpi_notify(ibm);
2917 if (ret == -ENODEV) {
2918 printk(IBM_NOTICE "disabling subdriver %s\n",
2919 ibm->name);
2920 ret = 0;
2921 goto err_out;
2922 }
2923 if (ret < 0)
2924 goto err_out;
2925 }
2926 }
2927
2928 dbg_printk(TPACPI_DBG_INIT,
2929 "%s installed\n", ibm->name);
2930
2931 if (ibm->read) {
2932 entry = create_proc_entry(ibm->name,
2933 S_IFREG | S_IRUGO | S_IWUSR,
2934 proc_dir);
2935 if (!entry) {
2936 printk(IBM_ERR "unable to create proc entry %s\n",
2937 ibm->name);
2938 ret = -ENODEV;
2939 goto err_out;
2940 }
2941 entry->owner = THIS_MODULE;
2942 entry->data = ibm;
2943 entry->read_proc = &dispatch_procfs_read;
2944 if (ibm->write)
2945 entry->write_proc = &dispatch_procfs_write;
2946 ibm->flags.proc_created = 1;
2947 }
2948
2949 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
2950
2951 return 0;
2952
2953 err_out:
2954 dbg_printk(TPACPI_DBG_INIT,
2955 "%s: at error exit path with result %d\n",
2956 ibm->name, ret);
2957
2958 ibm_exit(ibm);
2959 return (ret < 0)? ret : 0;
2960 }
2961
2962 static void ibm_exit(struct ibm_struct *ibm)
2963 {
2964 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
2965
2966 list_del_init(&ibm->all_drivers);
2967
2968 if (ibm->flags.acpi_notify_installed) {
2969 dbg_printk(TPACPI_DBG_EXIT,
2970 "%s: acpi_remove_notify_handler\n", ibm->name);
2971 BUG_ON(!ibm->acpi);
2972 acpi_remove_notify_handler(*ibm->acpi->handle,
2973 ibm->acpi->type,
2974 dispatch_acpi_notify);
2975 ibm->flags.acpi_notify_installed = 0;
2976 ibm->flags.acpi_notify_installed = 0;
2977 }
2978
2979 if (ibm->flags.proc_created) {
2980 dbg_printk(TPACPI_DBG_EXIT,
2981 "%s: remove_proc_entry\n", ibm->name);
2982 remove_proc_entry(ibm->name, proc_dir);
2983 ibm->flags.proc_created = 0;
2984 }
2985
2986 if (ibm->flags.acpi_driver_registered) {
2987 dbg_printk(TPACPI_DBG_EXIT,
2988 "%s: acpi_bus_unregister_driver\n", ibm->name);
2989 BUG_ON(!ibm->acpi);
2990 acpi_bus_unregister_driver(ibm->acpi->driver);
2991 kfree(ibm->acpi->driver);
2992 ibm->acpi->driver = NULL;
2993 ibm->flags.acpi_driver_registered = 0;
2994 }
2995
2996 if (ibm->flags.init_called && ibm->exit) {
2997 ibm->exit();
2998 ibm->flags.init_called = 0;
2999 }
3000
3001 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
3002 }
3003
3004 /* Probing */
3005
3006 static char *ibm_thinkpad_ec_found = NULL;
3007
3008 static char* __init check_dmi_for_ec(void)
3009 {
3010 struct dmi_device *dev = NULL;
3011 char ec_fw_string[18];
3012
3013 /*
3014 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
3015 * X32 or newer, all Z series; Some models must have an
3016 * up-to-date BIOS or they will not be detected.
3017 *
3018 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
3019 */
3020 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
3021 if (sscanf(dev->name,
3022 "IBM ThinkPad Embedded Controller -[%17c",
3023 ec_fw_string) == 1) {
3024 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
3025 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
3026 return kstrdup(ec_fw_string, GFP_KERNEL);
3027 }
3028 }
3029 return NULL;
3030 }
3031
3032 static int __init probe_for_thinkpad(void)
3033 {
3034 int is_thinkpad;
3035
3036 if (acpi_disabled)
3037 return -ENODEV;
3038
3039 /*
3040 * Non-ancient models have better DMI tagging, but very old models
3041 * don't.
3042 */
3043 is_thinkpad = dmi_name_in_vendors("ThinkPad");
3044
3045 /* ec is required because many other handles are relative to it */
3046 IBM_ACPIHANDLE_INIT(ec);
3047 if (!ec_handle) {
3048 if (is_thinkpad)
3049 printk(IBM_ERR
3050 "Not yet supported ThinkPad detected!\n");
3051 return -ENODEV;
3052 }
3053
3054 /*
3055 * Risks a regression on very old machines, but reduces potential
3056 * false positives a damn great deal
3057 */
3058 if (!is_thinkpad)
3059 is_thinkpad = dmi_name_in_vendors("IBM");
3060
3061 if (!is_thinkpad && !force_load)
3062 return -ENODEV;
3063
3064 return 0;
3065 }
3066
3067
3068 /* Module init, exit, parameters */
3069
3070 static struct ibm_init_struct ibms_init[] __initdata = {
3071 {
3072 .init = thinkpad_acpi_driver_init,
3073 .data = &thinkpad_acpi_driver_data,
3074 },
3075 {
3076 .init = hotkey_init,
3077 .data = &hotkey_driver_data,
3078 },
3079 {
3080 .init = bluetooth_init,
3081 .data = &bluetooth_driver_data,
3082 },
3083 {
3084 .init = wan_init,
3085 .data = &wan_driver_data,
3086 },
3087 {
3088 .init = video_init,
3089 .data = &video_driver_data,
3090 },
3091 {
3092 .init = light_init,
3093 .data = &light_driver_data,
3094 },
3095 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3096 {
3097 .init = dock_init,
3098 .data = &dock_driver_data[0],
3099 },
3100 {
3101 .data = &dock_driver_data[1],
3102 },
3103 #endif
3104 #ifdef CONFIG_THINKPAD_ACPI_BAY
3105 {
3106 .init = bay_init,
3107 .data = &bay_driver_data,
3108 },
3109 #endif
3110 {
3111 .init = cmos_init,
3112 .data = &cmos_driver_data,
3113 },
3114 {
3115 .init = led_init,
3116 .data = &led_driver_data,
3117 },
3118 {
3119 .init = beep_init,
3120 .data = &beep_driver_data,
3121 },
3122 {
3123 .init = thermal_init,
3124 .data = &thermal_driver_data,
3125 },
3126 {
3127 .data = &ecdump_driver_data,
3128 },
3129 {
3130 .init = brightness_init,
3131 .data = &brightness_driver_data,
3132 },
3133 {
3134 .data = &volume_driver_data,
3135 },
3136 {
3137 .init = fan_init,
3138 .data = &fan_driver_data,
3139 },
3140 };
3141
3142 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
3143 {
3144 unsigned int i;
3145 struct ibm_struct *ibm;
3146
3147 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3148 ibm = ibms_init[i].data;
3149 BUG_ON(ibm == NULL);
3150
3151 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
3152 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
3153 return -ENOSPC;
3154 strcpy(ibms_init[i].param, val);
3155 strcat(ibms_init[i].param, ",");
3156 return 0;
3157 }
3158 }
3159
3160 return -EINVAL;
3161 }
3162
3163 static int experimental;
3164 module_param(experimental, int, 0);
3165
3166 static u32 dbg_level;
3167 module_param_named(debug, dbg_level, uint, 0);
3168
3169 static int force_load;
3170 module_param(force_load, int, 0);
3171
3172 #define IBM_PARAM(feature) \
3173 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
3174
3175 IBM_PARAM(hotkey);
3176 IBM_PARAM(bluetooth);
3177 IBM_PARAM(video);
3178 IBM_PARAM(light);
3179 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3180 IBM_PARAM(dock);
3181 #endif
3182 #ifdef CONFIG_THINKPAD_ACPI_BAY
3183 IBM_PARAM(bay);
3184 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3185 IBM_PARAM(cmos);
3186 IBM_PARAM(led);
3187 IBM_PARAM(beep);
3188 IBM_PARAM(ecdump);
3189 IBM_PARAM(brightness);
3190 IBM_PARAM(volume);
3191 IBM_PARAM(fan);
3192
3193 static int __init thinkpad_acpi_module_init(void)
3194 {
3195 int ret, i;
3196
3197 ret = probe_for_thinkpad();
3198 if (ret)
3199 return ret;
3200
3201 ibm_thinkpad_ec_found = check_dmi_for_ec();
3202 IBM_ACPIHANDLE_INIT(ecrd);
3203 IBM_ACPIHANDLE_INIT(ecwr);
3204
3205 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
3206 if (!proc_dir) {
3207 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
3208 thinkpad_acpi_module_exit();
3209 return -ENODEV;
3210 }
3211 proc_dir->owner = THIS_MODULE;
3212
3213 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3214 ret = ibm_init(&ibms_init[i]);
3215 if (ret >= 0 && *ibms_init[i].param)
3216 ret = ibms_init[i].data->write(ibms_init[i].param);
3217 if (ret < 0) {
3218 thinkpad_acpi_module_exit();
3219 return ret;
3220 }
3221 }
3222
3223 return 0;
3224 }
3225
3226 static void thinkpad_acpi_module_exit(void)
3227 {
3228 struct ibm_struct *ibm, *itmp;
3229
3230 list_for_each_entry_safe_reverse(ibm, itmp,
3231 &tpacpi_all_drivers,
3232 all_drivers) {
3233 ibm_exit(ibm);
3234 }
3235
3236 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
3237
3238 if (proc_dir)
3239 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
3240
3241 kfree(ibm_thinkpad_ec_found);
3242 }
3243
3244 module_init(thinkpad_acpi_module_init);
3245 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree