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ACPI: thinkpad-acpi: driver sysfs conversion
[wrt350n-kernel.git] / drivers / misc / thinkpad_acpi.c
bloba31d00d570cb3774cd320b40f5a0b03317291a7f
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 #define TPACPI_SYSFS_VERSION 0x000100
26
27 /*
28 * Changelog:
29 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
30 * drivers/misc.
31 *
32 * 2006-11-22 0.13 new maintainer
33 * changelog now lives in git commit history, and will
34 * not be updated further in-file.
35 *
36 * 2005-08-17 0.12 fix compilation on 2.6.13-rc kernels
37 * 2005-03-17 0.11 support for 600e, 770x
38 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
39 * support for 770e, G41
40 * G40 and G41 don't have a thinklight
41 * temperatures no longer experimental
42 * experimental brightness control
43 * experimental volume control
44 * experimental fan enable/disable
45 * 2005-01-16 0.10 fix module loading on R30, R31
46 * 2005-01-16 0.9 support for 570, R30, R31
47 * ultrabay support on A22p, A3x
48 * limit arg for cmos, led, beep, drop experimental status
49 * more capable led control on A21e, A22p, T20-22, X20
50 * experimental temperatures and fan speed
51 * experimental embedded controller register dump
52 * mark more functions as __init, drop incorrect __exit
53 * use MODULE_VERSION
54 * thanks to Henrik Brix Andersen <brix@gentoo.org>
55 * fix parameter passing on module loading
56 * thanks to Rusty Russell <rusty@rustcorp.com.au>
57 * thanks to Jim Radford <radford@blackbean.org>
58 * 2004-11-08 0.8 fix init error case, don't return from a macro
59 * thanks to Chris Wright <chrisw@osdl.org>
60 * 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
61 * fix led control on A21e
62 * 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
63 * 2004-10-18 0.5 thinklight support on A21e, G40, R32, T20, T21, X20
64 * proc file format changed
65 * video_switch command
66 * experimental cmos control
67 * experimental led control
68 * experimental acpi sounds
69 * 2004-09-16 0.4 support for module parameters
70 * hotkey mask can be prefixed by 0x
71 * video output switching
72 * video expansion control
73 * ultrabay eject support
74 * removed lcd brightness/on/off control, didn't work
75 * 2004-08-17 0.3 support for R40
76 * lcd off, brightness control
77 * thinklight on/off
78 * 2004-08-14 0.2 support for T series, X20
79 * bluetooth enable/disable
80 * hotkey events disabled by default
81 * removed fan control, currently useless
82 * 2004-08-09 0.1 initial release, support for X series
83 */
84
85 #include "thinkpad_acpi.h"
86
87 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
88 MODULE_DESCRIPTION(IBM_DESC);
89 MODULE_VERSION(IBM_VERSION);
90 MODULE_LICENSE("GPL");
91
92 /* Please remove this in year 2009 */
93 MODULE_ALIAS("ibm_acpi");
94
95 #define __unused __attribute__ ((unused))
96
97 /****************************************************************************
98 ****************************************************************************
99 *
100 * ACPI Helpers and device model
101 *
102 ****************************************************************************
103 ****************************************************************************/
104
105 /*************************************************************************
106 * ACPI basic handles
107 */
108
109 static acpi_handle root_handle = NULL;
110
111 #define IBM_HANDLE(object, parent, paths...) \
112 static acpi_handle object##_handle; \
113 static acpi_handle *object##_parent = &parent##_handle; \
114 static char *object##_path; \
115 static char *object##_paths[] = { paths }
116
117 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
118 "\\_SB.PCI.ISA.EC", /* 570 */
119 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
120 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
121 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
122 "\\_SB.PCI0.ICH3.EC0", /* R31 */
123 "\\_SB.PCI0.LPC.EC", /* all others */
124 );
125
126 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
127 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
128
129
130 /*************************************************************************
131 * Misc ACPI handles
132 */
133
134 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
135 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
136 "\\CMS", /* R40, R40e */
137 ); /* all others */
138
139 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
140 "^HKEY", /* R30, R31 */
141 "HKEY", /* all others */
142 ); /* 570 */
143
144
145 /*************************************************************************
146 * ACPI helpers
147 */
148
149 static int acpi_evalf(acpi_handle handle,
150 void *res, char *method, char *fmt, ...)
151 {
152 char *fmt0 = fmt;
153 struct acpi_object_list params;
154 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
155 struct acpi_buffer result, *resultp;
156 union acpi_object out_obj;
157 acpi_status status;
158 va_list ap;
159 char res_type;
160 int success;
161 int quiet;
162
163 if (!*fmt) {
164 printk(IBM_ERR "acpi_evalf() called with empty format\n");
165 return 0;
166 }
167
168 if (*fmt == 'q') {
169 quiet = 1;
170 fmt++;
171 } else
172 quiet = 0;
173
174 res_type = *(fmt++);
175
176 params.count = 0;
177 params.pointer = &in_objs[0];
178
179 va_start(ap, fmt);
180 while (*fmt) {
181 char c = *(fmt++);
182 switch (c) {
183 case 'd': /* int */
184 in_objs[params.count].integer.value = va_arg(ap, int);
185 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
186 break;
187 /* add more types as needed */
188 default:
189 printk(IBM_ERR "acpi_evalf() called "
190 "with invalid format character '%c'\n", c);
191 return 0;
192 }
193 }
194 va_end(ap);
195
196 if (res_type != 'v') {
197 result.length = sizeof(out_obj);
198 result.pointer = &out_obj;
199 resultp = &result;
200 } else
201 resultp = NULL;
202
203 status = acpi_evaluate_object(handle, method, &params, resultp);
204
205 switch (res_type) {
206 case 'd': /* int */
207 if (res)
208 *(int *)res = out_obj.integer.value;
209 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
210 break;
211 case 'v': /* void */
212 success = status == AE_OK;
213 break;
214 /* add more types as needed */
215 default:
216 printk(IBM_ERR "acpi_evalf() called "
217 "with invalid format character '%c'\n", res_type);
218 return 0;
219 }
220
221 if (!success && !quiet)
222 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
223 method, fmt0, status);
224
225 return success;
226 }
227
228 static void __unused acpi_print_int(acpi_handle handle, char *method)
229 {
230 int i;
231
232 if (acpi_evalf(handle, &i, method, "d"))
233 printk(IBM_INFO "%s = 0x%x\n", method, i);
234 else
235 printk(IBM_ERR "error calling %s\n", method);
236 }
237
238 static int acpi_ec_read(int i, u8 * p)
239 {
240 int v;
241
242 if (ecrd_handle) {
243 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
244 return 0;
245 *p = v;
246 } else {
247 if (ec_read(i, p) < 0)
248 return 0;
249 }
250
251 return 1;
252 }
253
254 static int acpi_ec_write(int i, u8 v)
255 {
256 if (ecwr_handle) {
257 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
258 return 0;
259 } else {
260 if (ec_write(i, v) < 0)
261 return 0;
262 }
263
264 return 1;
265 }
266
267 static int _sta(acpi_handle handle)
268 {
269 int status;
270
271 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
272 status = 0;
273
274 return status;
275 }
276
277 static int issue_thinkpad_cmos_command(int cmos_cmd)
278 {
279 if (!cmos_handle)
280 return -ENXIO;
281
282 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
283 return -EIO;
284
285 return 0;
286 }
287
288 /*************************************************************************
289 * ACPI device model
290 */
291
292 static void drv_acpi_handle_init(char *name,
293 acpi_handle *handle, acpi_handle parent,
294 char **paths, int num_paths, char **path)
295 {
296 int i;
297 acpi_status status;
298
299 for (i = 0; i < num_paths; i++) {
300 status = acpi_get_handle(parent, paths[i], handle);
301 if (ACPI_SUCCESS(status)) {
302 *path = paths[i];
303 return;
304 }
305 }
306
307 *handle = NULL;
308 }
309
310 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
311 {
312 struct ibm_struct *ibm = data;
313
314 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
315 return;
316
317 ibm->acpi->notify(ibm, event);
318 }
319
320 static int __init setup_acpi_notify(struct ibm_struct *ibm)
321 {
322 acpi_status status;
323 int ret;
324
325 BUG_ON(!ibm->acpi);
326
327 if (!*ibm->acpi->handle)
328 return 0;
329
330 dbg_printk(TPACPI_DBG_INIT,
331 "setting up ACPI notify for %s\n", ibm->name);
332
333 ret = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
334 if (ret < 0) {
335 printk(IBM_ERR "%s device not present\n", ibm->name);
336 return -ENODEV;
337 }
338
339 acpi_driver_data(ibm->acpi->device) = ibm;
340 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
341 IBM_ACPI_EVENT_PREFIX,
342 ibm->name);
343
344 status = acpi_install_notify_handler(*ibm->acpi->handle,
345 ibm->acpi->type, dispatch_acpi_notify, ibm);
346 if (ACPI_FAILURE(status)) {
347 if (status == AE_ALREADY_EXISTS) {
348 printk(IBM_NOTICE "another device driver is already handling %s events\n",
349 ibm->name);
350 } else {
351 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
352 ibm->name, status);
353 }
354 return -ENODEV;
355 }
356 ibm->flags.acpi_notify_installed = 1;
357 return 0;
358 }
359
360 static int __init tpacpi_device_add(struct acpi_device *device)
361 {
362 return 0;
363 }
364
365 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
366 {
367 int ret;
368
369 dbg_printk(TPACPI_DBG_INIT,
370 "registering %s as an ACPI driver\n", ibm->name);
371
372 BUG_ON(!ibm->acpi);
373
374 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
375 if (!ibm->acpi->driver) {
376 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
377 return -ENOMEM;
378 }
379
380 sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
381 ibm->acpi->driver->ids = ibm->acpi->hid;
382 ibm->acpi->driver->ops.add = &tpacpi_device_add;
383
384 ret = acpi_bus_register_driver(ibm->acpi->driver);
385 if (ret < 0) {
386 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
387 ibm->acpi->hid, ret);
388 kfree(ibm->acpi->driver);
389 ibm->acpi->driver = NULL;
390 } else if (!ret)
391 ibm->flags.acpi_driver_registered = 1;
392
393 return ret;
394 }
395
396
397 /****************************************************************************
398 ****************************************************************************
399 *
400 * Procfs Helpers
401 *
402 ****************************************************************************
403 ****************************************************************************/
404
405 static int dispatch_procfs_read(char *page, char **start, off_t off,
406 int count, int *eof, void *data)
407 {
408 struct ibm_struct *ibm = data;
409 int len;
410
411 if (!ibm || !ibm->read)
412 return -EINVAL;
413
414 len = ibm->read(page);
415 if (len < 0)
416 return len;
417
418 if (len <= off + count)
419 *eof = 1;
420 *start = page + off;
421 len -= off;
422 if (len > count)
423 len = count;
424 if (len < 0)
425 len = 0;
426
427 return len;
428 }
429
430 static int dispatch_procfs_write(struct file *file,
431 const char __user * userbuf,
432 unsigned long count, void *data)
433 {
434 struct ibm_struct *ibm = data;
435 char *kernbuf;
436 int ret;
437
438 if (!ibm || !ibm->write)
439 return -EINVAL;
440
441 kernbuf = kmalloc(count + 2, GFP_KERNEL);
442 if (!kernbuf)
443 return -ENOMEM;
444
445 if (copy_from_user(kernbuf, userbuf, count)) {
446 kfree(kernbuf);
447 return -EFAULT;
448 }
449
450 kernbuf[count] = 0;
451 strcat(kernbuf, ",");
452 ret = ibm->write(kernbuf);
453 if (ret == 0)
454 ret = count;
455
456 kfree(kernbuf);
457
458 return ret;
459 }
460
461 static char *next_cmd(char **cmds)
462 {
463 char *start = *cmds;
464 char *end;
465
466 while ((end = strchr(start, ',')) && end == start)
467 start = end + 1;
468
469 if (!end)
470 return NULL;
471
472 *end = 0;
473 *cmds = end + 1;
474 return start;
475 }
476
477
478 /****************************************************************************
479 ****************************************************************************
480 *
481 * Device model: hwmon and platform
482 *
483 ****************************************************************************
484 ****************************************************************************/
485
486 static struct platform_device *tpacpi_pdev = NULL;
487 static struct class_device *tpacpi_hwmon = NULL;
488
489 static struct platform_driver tpacpi_pdriver = {
490 .driver = {
491 .name = IBM_DRVR_NAME,
492 .owner = THIS_MODULE,
493 },
494 };
495
496
497 /*************************************************************************
498 * thinkpad-acpi driver attributes
499 */
500
501 /* interface_version --------------------------------------------------- */
502 static ssize_t tpacpi_driver_interface_version_show(
503 struct device_driver *drv,
504 char *buf)
505 {
506 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
507 }
508
509 static DRIVER_ATTR(interface_version, S_IRUGO,
510 tpacpi_driver_interface_version_show, NULL);
511
512 /* debug_level --------------------------------------------------------- */
513 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
514 char *buf)
515 {
516 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
517 }
518
519 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
520 const char *buf, size_t count)
521 {
522 unsigned long t;
523 char *endp;
524
525 t = simple_strtoul(buf, &endp, 0);
526 while (*endp && isspace(*endp))
527 endp++;
528 if (*endp)
529 return -EINVAL;
530
531 dbg_level = t;
532
533 return count;
534 }
535
536 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
537 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
538
539 /* version ------------------------------------------------------------- */
540 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
541 char *buf)
542 {
543 return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
544 }
545
546 static DRIVER_ATTR(version, S_IRUGO,
547 tpacpi_driver_version_show, NULL);
548
549 /* --------------------------------------------------------------------- */
550
551 static struct driver_attribute* tpacpi_driver_attributes[] = {
552 &driver_attr_debug_level, &driver_attr_version,
553 &driver_attr_interface_version,
554 };
555
556 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
557 {
558 int i, res;
559
560 i = 0;
561 res = 0;
562 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
563 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
564 i++;
565 }
566
567 return res;
568 }
569
570 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
571 {
572 int i;
573
574 for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
575 driver_remove_file(drv, tpacpi_driver_attributes[i]);
576 }
577
578 /****************************************************************************
579 ****************************************************************************
580 *
581 * Subdrivers
582 *
583 ****************************************************************************
584 ****************************************************************************/
585
586 /*************************************************************************
587 * thinkpad-acpi init subdriver
588 */
589
590 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
591 {
592 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
593 printk(IBM_INFO "%s\n", IBM_URL);
594
595 if (ibm_thinkpad_ec_found)
596 printk(IBM_INFO "ThinkPad EC firmware %s\n",
597 ibm_thinkpad_ec_found);
598
599 return 0;
600 }
601
602 static int thinkpad_acpi_driver_read(char *p)
603 {
604 int len = 0;
605
606 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
607 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
608
609 return len;
610 }
611
612 static struct ibm_struct thinkpad_acpi_driver_data = {
613 .name = "driver",
614 .read = thinkpad_acpi_driver_read,
615 };
616
617 /*************************************************************************
618 * Hotkey subdriver
619 */
620
621 static int hotkey_orig_status;
622 static int hotkey_orig_mask;
623
624 static int __init hotkey_init(struct ibm_init_struct *iibm)
625 {
626 int res;
627
628 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
629
630 IBM_ACPIHANDLE_INIT(hkey);
631
632 /* hotkey not supported on 570 */
633 tp_features.hotkey = hkey_handle != NULL;
634
635 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
636 str_supported(tp_features.hotkey));
637
638 if (tp_features.hotkey) {
639 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
640 A30, R30, R31, T20-22, X20-21, X22-24 */
641 tp_features.hotkey_mask =
642 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
643
644 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
645 str_supported(tp_features.hotkey_mask));
646
647 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
648 if (res)
649 return res;
650 }
651
652 return (tp_features.hotkey)? 0 : 1;
653 }
654
655 static void hotkey_exit(void)
656 {
657 int res;
658
659 if (tp_features.hotkey) {
660 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
661 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
662 if (res)
663 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
664 }
665 }
666
667 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
668 {
669 int hkey;
670
671 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
672 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
673 else {
674 printk(IBM_ERR "unknown hotkey event %d\n", event);
675 acpi_bus_generate_event(ibm->acpi->device, event, 0);
676 }
677 }
678
679 static int hotkey_get(int *status, int *mask)
680 {
681 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
682 return -EIO;
683
684 if (tp_features.hotkey_mask)
685 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
686 return -EIO;
687
688 return 0;
689 }
690
691 static int hotkey_set(int status, int mask)
692 {
693 int i;
694
695 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
696 return -EIO;
697
698 if (tp_features.hotkey_mask)
699 for (i = 0; i < 32; i++) {
700 int bit = ((1 << i) & mask) != 0;
701 if (!acpi_evalf(hkey_handle,
702 NULL, "MHKM", "vdd", i + 1, bit))
703 return -EIO;
704 }
705
706 return 0;
707 }
708
709 static int hotkey_read(char *p)
710 {
711 int res, status, mask;
712 int len = 0;
713
714 if (!tp_features.hotkey) {
715 len += sprintf(p + len, "status:\t\tnot supported\n");
716 return len;
717 }
718
719 res = hotkey_get(&status, &mask);
720 if (res)
721 return res;
722
723 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
724 if (tp_features.hotkey_mask) {
725 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
726 len += sprintf(p + len,
727 "commands:\tenable, disable, reset, <mask>\n");
728 } else {
729 len += sprintf(p + len, "mask:\t\tnot supported\n");
730 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
731 }
732
733 return len;
734 }
735
736 static int hotkey_write(char *buf)
737 {
738 int res, status, mask;
739 char *cmd;
740 int do_cmd = 0;
741
742 if (!tp_features.hotkey)
743 return -ENODEV;
744
745 res = hotkey_get(&status, &mask);
746 if (res)
747 return res;
748
749 while ((cmd = next_cmd(&buf))) {
750 if (strlencmp(cmd, "enable") == 0) {
751 status = 1;
752 } else if (strlencmp(cmd, "disable") == 0) {
753 status = 0;
754 } else if (strlencmp(cmd, "reset") == 0) {
755 status = hotkey_orig_status;
756 mask = hotkey_orig_mask;
757 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
758 /* mask set */
759 } else if (sscanf(cmd, "%x", &mask) == 1) {
760 /* mask set */
761 } else
762 return -EINVAL;
763 do_cmd = 1;
764 }
765
766 if (do_cmd) {
767 res = hotkey_set(status, mask);
768 if (res)
769 return res;
770 }
771
772 return 0;
773 }
774
775 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
776 .hid = IBM_HKEY_HID,
777 .notify = hotkey_notify,
778 .handle = &hkey_handle,
779 .type = ACPI_DEVICE_NOTIFY,
780 };
781
782 static struct ibm_struct hotkey_driver_data = {
783 .name = "hotkey",
784 .read = hotkey_read,
785 .write = hotkey_write,
786 .exit = hotkey_exit,
787 .acpi = &ibm_hotkey_acpidriver,
788 };
789
790 /*************************************************************************
791 * Bluetooth subdriver
792 */
793
794 static int __init bluetooth_init(struct ibm_init_struct *iibm)
795 {
796 int status = 0;
797
798 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
799
800 IBM_ACPIHANDLE_INIT(hkey);
801
802 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
803 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
804 tp_features.bluetooth = hkey_handle &&
805 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
806
807 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
808 str_supported(tp_features.bluetooth),
809 status);
810
811 if (tp_features.bluetooth &&
812 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
813 /* no bluetooth hardware present in system */
814 tp_features.bluetooth = 0;
815 dbg_printk(TPACPI_DBG_INIT,
816 "bluetooth hardware not installed\n");
817 }
818
819 return (tp_features.bluetooth)? 0 : 1;
820 }
821
822 static int bluetooth_get_radiosw(void)
823 {
824 int status;
825
826 if (!tp_features.bluetooth)
827 return -ENODEV;
828
829 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
830 return -EIO;
831
832 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
833 }
834
835 static int bluetooth_set_radiosw(int radio_on)
836 {
837 int status;
838
839 if (!tp_features.bluetooth)
840 return -ENODEV;
841
842 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
843 return -EIO;
844 if (radio_on)
845 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
846 else
847 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
848 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
849 return -EIO;
850
851 return 0;
852 }
853
854 static int bluetooth_read(char *p)
855 {
856 int len = 0;
857 int status = bluetooth_get_radiosw();
858
859 if (!tp_features.bluetooth)
860 len += sprintf(p + len, "status:\t\tnot supported\n");
861 else {
862 len += sprintf(p + len, "status:\t\t%s\n",
863 (status)? "enabled" : "disabled");
864 len += sprintf(p + len, "commands:\tenable, disable\n");
865 }
866
867 return len;
868 }
869
870 static int bluetooth_write(char *buf)
871 {
872 char *cmd;
873
874 if (!tp_features.bluetooth)
875 return -ENODEV;
876
877 while ((cmd = next_cmd(&buf))) {
878 if (strlencmp(cmd, "enable") == 0) {
879 bluetooth_set_radiosw(1);
880 } else if (strlencmp(cmd, "disable") == 0) {
881 bluetooth_set_radiosw(0);
882 } else
883 return -EINVAL;
884 }
885
886 return 0;
887 }
888
889 static struct ibm_struct bluetooth_driver_data = {
890 .name = "bluetooth",
891 .read = bluetooth_read,
892 .write = bluetooth_write,
893 };
894
895 /*************************************************************************
896 * Wan subdriver
897 */
898
899 static int __init wan_init(struct ibm_init_struct *iibm)
900 {
901 int status = 0;
902
903 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
904
905 IBM_ACPIHANDLE_INIT(hkey);
906
907 tp_features.wan = hkey_handle &&
908 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
909
910 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
911 str_supported(tp_features.wan),
912 status);
913
914 if (tp_features.wan &&
915 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
916 /* no wan hardware present in system */
917 tp_features.wan = 0;
918 dbg_printk(TPACPI_DBG_INIT,
919 "wan hardware not installed\n");
920 }
921
922 return (tp_features.wan)? 0 : 1;
923 }
924
925 static int wan_get_radiosw(void)
926 {
927 int status;
928
929 if (!tp_features.wan)
930 return -ENODEV;
931
932 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
933 return -EIO;
934
935 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
936 }
937
938 static int wan_set_radiosw(int radio_on)
939 {
940 int status;
941
942 if (!tp_features.wan)
943 return -ENODEV;
944
945 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
946 return -EIO;
947 if (radio_on)
948 status |= TP_ACPI_WANCARD_RADIOSSW;
949 else
950 status &= ~TP_ACPI_WANCARD_RADIOSSW;
951 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
952 return -EIO;
953
954 return 0;
955 }
956
957 static int wan_read(char *p)
958 {
959 int len = 0;
960 int status = wan_get_radiosw();
961
962 if (!tp_features.wan)
963 len += sprintf(p + len, "status:\t\tnot supported\n");
964 else {
965 len += sprintf(p + len, "status:\t\t%s\n",
966 (status)? "enabled" : "disabled");
967 len += sprintf(p + len, "commands:\tenable, disable\n");
968 }
969
970 return len;
971 }
972
973 static int wan_write(char *buf)
974 {
975 char *cmd;
976
977 if (!tp_features.wan)
978 return -ENODEV;
979
980 while ((cmd = next_cmd(&buf))) {
981 if (strlencmp(cmd, "enable") == 0) {
982 wan_set_radiosw(1);
983 } else if (strlencmp(cmd, "disable") == 0) {
984 wan_set_radiosw(0);
985 } else
986 return -EINVAL;
987 }
988
989 return 0;
990 }
991
992 static struct ibm_struct wan_driver_data = {
993 .name = "wan",
994 .read = wan_read,
995 .write = wan_write,
996 .flags.experimental = 1,
997 };
998
999 /*************************************************************************
1000 * Video subdriver
1001 */
1002
1003 static enum video_access_mode video_supported;
1004 static int video_orig_autosw;
1005
1006 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1007 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1008 "\\_SB.PCI0.VID0", /* 770e */
1009 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1010 "\\_SB.PCI0.AGP.VID", /* all others */
1011 ); /* R30, R31 */
1012
1013 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1014
1015 static int __init video_init(struct ibm_init_struct *iibm)
1016 {
1017 int ivga;
1018
1019 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1020
1021 IBM_ACPIHANDLE_INIT(vid);
1022 IBM_ACPIHANDLE_INIT(vid2);
1023
1024 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1025 /* G41, assume IVGA doesn't change */
1026 vid_handle = vid2_handle;
1027
1028 if (!vid_handle)
1029 /* video switching not supported on R30, R31 */
1030 video_supported = TPACPI_VIDEO_NONE;
1031 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1032 /* 570 */
1033 video_supported = TPACPI_VIDEO_570;
1034 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1035 /* 600e/x, 770e, 770x */
1036 video_supported = TPACPI_VIDEO_770;
1037 else
1038 /* all others */
1039 video_supported = TPACPI_VIDEO_NEW;
1040
1041 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1042 str_supported(video_supported != TPACPI_VIDEO_NONE),
1043 video_supported);
1044
1045 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1046 }
1047
1048 static void video_exit(void)
1049 {
1050 dbg_printk(TPACPI_DBG_EXIT,
1051 "restoring original video autoswitch mode\n");
1052 if (video_autosw_set(video_orig_autosw))
1053 printk(IBM_ERR "error while trying to restore original "
1054 "video autoswitch mode\n");
1055 }
1056
1057 static int video_outputsw_get(void)
1058 {
1059 int status = 0;
1060 int i;
1061
1062 switch (video_supported) {
1063 case TPACPI_VIDEO_570:
1064 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1065 TP_ACPI_VIDEO_570_PHSCMD))
1066 return -EIO;
1067 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1068 break;
1069 case TPACPI_VIDEO_770:
1070 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1071 return -EIO;
1072 if (i)
1073 status |= TP_ACPI_VIDEO_S_LCD;
1074 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1075 return -EIO;
1076 if (i)
1077 status |= TP_ACPI_VIDEO_S_CRT;
1078 break;
1079 case TPACPI_VIDEO_NEW:
1080 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1081 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1082 return -EIO;
1083 if (i)
1084 status |= TP_ACPI_VIDEO_S_CRT;
1085
1086 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1087 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1088 return -EIO;
1089 if (i)
1090 status |= TP_ACPI_VIDEO_S_LCD;
1091 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1092 return -EIO;
1093 if (i)
1094 status |= TP_ACPI_VIDEO_S_DVI;
1095 break;
1096 default:
1097 return -ENOSYS;
1098 }
1099
1100 return status;
1101 }
1102
1103 static int video_outputsw_set(int status)
1104 {
1105 int autosw;
1106 int res = 0;
1107
1108 switch (video_supported) {
1109 case TPACPI_VIDEO_570:
1110 res = acpi_evalf(NULL, NULL,
1111 "\\_SB.PHS2", "vdd",
1112 TP_ACPI_VIDEO_570_PHS2CMD,
1113 status | TP_ACPI_VIDEO_570_PHS2SET);
1114 break;
1115 case TPACPI_VIDEO_770:
1116 autosw = video_autosw_get();
1117 if (autosw < 0)
1118 return autosw;
1119
1120 res = video_autosw_set(1);
1121 if (res)
1122 return res;
1123 res = acpi_evalf(vid_handle, NULL,
1124 "ASWT", "vdd", status * 0x100, 0);
1125 if (!autosw && video_autosw_set(autosw)) {
1126 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1127 return -EIO;
1128 }
1129 break;
1130 case TPACPI_VIDEO_NEW:
1131 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1132 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1133 break;
1134 default:
1135 return -ENOSYS;
1136 }
1137
1138 return (res)? 0 : -EIO;
1139 }
1140
1141 static int video_autosw_get(void)
1142 {
1143 int autosw = 0;
1144
1145 switch (video_supported) {
1146 case TPACPI_VIDEO_570:
1147 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1148 return -EIO;
1149 break;
1150 case TPACPI_VIDEO_770:
1151 case TPACPI_VIDEO_NEW:
1152 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1153 return -EIO;
1154 break;
1155 default:
1156 return -ENOSYS;
1157 }
1158
1159 return autosw & 1;
1160 }
1161
1162 static int video_autosw_set(int enable)
1163 {
1164 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1165 return -EIO;
1166 return 0;
1167 }
1168
1169 static int video_outputsw_cycle(void)
1170 {
1171 int autosw = video_autosw_get();
1172 int res;
1173
1174 if (autosw < 0)
1175 return autosw;
1176
1177 switch (video_supported) {
1178 case TPACPI_VIDEO_570:
1179 res = video_autosw_set(1);
1180 if (res)
1181 return res;
1182 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1183 break;
1184 case TPACPI_VIDEO_770:
1185 case TPACPI_VIDEO_NEW:
1186 res = video_autosw_set(1);
1187 if (res)
1188 return res;
1189 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1190 break;
1191 default:
1192 return -ENOSYS;
1193 }
1194 if (!autosw && video_autosw_set(autosw)) {
1195 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1196 return -EIO;
1197 }
1198
1199 return (res)? 0 : -EIO;
1200 }
1201
1202 static int video_expand_toggle(void)
1203 {
1204 switch (video_supported) {
1205 case TPACPI_VIDEO_570:
1206 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1207 0 : -EIO;
1208 case TPACPI_VIDEO_770:
1209 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1210 0 : -EIO;
1211 case TPACPI_VIDEO_NEW:
1212 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1213 0 : -EIO;
1214 default:
1215 return -ENOSYS;
1216 }
1217 /* not reached */
1218 }
1219
1220 static int video_read(char *p)
1221 {
1222 int status, autosw;
1223 int len = 0;
1224
1225 if (video_supported == TPACPI_VIDEO_NONE) {
1226 len += sprintf(p + len, "status:\t\tnot supported\n");
1227 return len;
1228 }
1229
1230 status = video_outputsw_get();
1231 if (status < 0)
1232 return status;
1233
1234 autosw = video_autosw_get();
1235 if (autosw < 0)
1236 return autosw;
1237
1238 len += sprintf(p + len, "status:\t\tsupported\n");
1239 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1240 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1241 if (video_supported == TPACPI_VIDEO_NEW)
1242 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1243 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1244 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1245 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1246 if (video_supported == TPACPI_VIDEO_NEW)
1247 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1248 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1249 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1250
1251 return len;
1252 }
1253
1254 static int video_write(char *buf)
1255 {
1256 char *cmd;
1257 int enable, disable, status;
1258 int res;
1259
1260 if (video_supported == TPACPI_VIDEO_NONE)
1261 return -ENODEV;
1262
1263 enable = 0;
1264 disable = 0;
1265
1266 while ((cmd = next_cmd(&buf))) {
1267 if (strlencmp(cmd, "lcd_enable") == 0) {
1268 enable |= TP_ACPI_VIDEO_S_LCD;
1269 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1270 disable |= TP_ACPI_VIDEO_S_LCD;
1271 } else if (strlencmp(cmd, "crt_enable") == 0) {
1272 enable |= TP_ACPI_VIDEO_S_CRT;
1273 } else if (strlencmp(cmd, "crt_disable") == 0) {
1274 disable |= TP_ACPI_VIDEO_S_CRT;
1275 } else if (video_supported == TPACPI_VIDEO_NEW &&
1276 strlencmp(cmd, "dvi_enable") == 0) {
1277 enable |= TP_ACPI_VIDEO_S_DVI;
1278 } else if (video_supported == TPACPI_VIDEO_NEW &&
1279 strlencmp(cmd, "dvi_disable") == 0) {
1280 disable |= TP_ACPI_VIDEO_S_DVI;
1281 } else if (strlencmp(cmd, "auto_enable") == 0) {
1282 res = video_autosw_set(1);
1283 if (res)
1284 return res;
1285 } else if (strlencmp(cmd, "auto_disable") == 0) {
1286 res = video_autosw_set(0);
1287 if (res)
1288 return res;
1289 } else if (strlencmp(cmd, "video_switch") == 0) {
1290 res = video_outputsw_cycle();
1291 if (res)
1292 return res;
1293 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1294 res = video_expand_toggle();
1295 if (res)
1296 return res;
1297 } else
1298 return -EINVAL;
1299 }
1300
1301 if (enable || disable) {
1302 status = video_outputsw_get();
1303 if (status < 0)
1304 return status;
1305 res = video_outputsw_set((status & ~disable) | enable);
1306 if (res)
1307 return res;
1308 }
1309
1310 return 0;
1311 }
1312
1313 static struct ibm_struct video_driver_data = {
1314 .name = "video",
1315 .read = video_read,
1316 .write = video_write,
1317 .exit = video_exit,
1318 };
1319
1320 /*************************************************************************
1321 * Light (thinklight) subdriver
1322 */
1323
1324 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1325 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1326
1327 static int __init light_init(struct ibm_init_struct *iibm)
1328 {
1329 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1330
1331 IBM_ACPIHANDLE_INIT(ledb);
1332 IBM_ACPIHANDLE_INIT(lght);
1333 IBM_ACPIHANDLE_INIT(cmos);
1334
1335 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1336 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1337
1338 if (tp_features.light)
1339 /* light status not supported on
1340 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1341 tp_features.light_status =
1342 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1343
1344 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1345 str_supported(tp_features.light));
1346
1347 return (tp_features.light)? 0 : 1;
1348 }
1349
1350 static int light_read(char *p)
1351 {
1352 int len = 0;
1353 int status = 0;
1354
1355 if (!tp_features.light) {
1356 len += sprintf(p + len, "status:\t\tnot supported\n");
1357 } else if (!tp_features.light_status) {
1358 len += sprintf(p + len, "status:\t\tunknown\n");
1359 len += sprintf(p + len, "commands:\ton, off\n");
1360 } else {
1361 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1362 return -EIO;
1363 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1364 len += sprintf(p + len, "commands:\ton, off\n");
1365 }
1366
1367 return len;
1368 }
1369
1370 static int light_write(char *buf)
1371 {
1372 int cmos_cmd, lght_cmd;
1373 char *cmd;
1374 int success;
1375
1376 if (!tp_features.light)
1377 return -ENODEV;
1378
1379 while ((cmd = next_cmd(&buf))) {
1380 if (strlencmp(cmd, "on") == 0) {
1381 cmos_cmd = 0x0c;
1382 lght_cmd = 1;
1383 } else if (strlencmp(cmd, "off") == 0) {
1384 cmos_cmd = 0x0d;
1385 lght_cmd = 0;
1386 } else
1387 return -EINVAL;
1388
1389 success = cmos_handle ?
1390 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1391 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1392 if (!success)
1393 return -EIO;
1394 }
1395
1396 return 0;
1397 }
1398
1399 static struct ibm_struct light_driver_data = {
1400 .name = "light",
1401 .read = light_read,
1402 .write = light_write,
1403 };
1404
1405 /*************************************************************************
1406 * Dock subdriver
1407 */
1408
1409 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1410
1411 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1412 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1413 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1414 "\\_SB.PCI.ISA.SLCE", /* 570 */
1415 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1416
1417 /* don't list other alternatives as we install a notify handler on the 570 */
1418 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1419
1420 #define dock_docked() (_sta(dock_handle) & 1)
1421
1422 static int __init dock_init(struct ibm_init_struct *iibm)
1423 {
1424 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1425
1426 IBM_ACPIHANDLE_INIT(dock);
1427 IBM_ACPIHANDLE_INIT(pci);
1428
1429 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1430 str_supported(dock_handle != NULL));
1431
1432 return (dock_handle)? 0 : 1;
1433 }
1434
1435 static void dock_notify(struct ibm_struct *ibm, u32 event)
1436 {
1437 int docked = dock_docked();
1438 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1439
1440 if (event == 1 && !pci) /* 570 */
1441 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1442 else if (event == 1 && pci) /* 570 */
1443 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1444 else if (event == 3 && docked)
1445 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1446 else if (event == 3 && !docked)
1447 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
1448 else if (event == 0 && docked)
1449 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1450 else {
1451 printk(IBM_ERR "unknown dock event %d, status %d\n",
1452 event, _sta(dock_handle));
1453 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
1454 }
1455 }
1456
1457 static int dock_read(char *p)
1458 {
1459 int len = 0;
1460 int docked = dock_docked();
1461
1462 if (!dock_handle)
1463 len += sprintf(p + len, "status:\t\tnot supported\n");
1464 else if (!docked)
1465 len += sprintf(p + len, "status:\t\tundocked\n");
1466 else {
1467 len += sprintf(p + len, "status:\t\tdocked\n");
1468 len += sprintf(p + len, "commands:\tdock, undock\n");
1469 }
1470
1471 return len;
1472 }
1473
1474 static int dock_write(char *buf)
1475 {
1476 char *cmd;
1477
1478 if (!dock_docked())
1479 return -ENODEV;
1480
1481 while ((cmd = next_cmd(&buf))) {
1482 if (strlencmp(cmd, "undock") == 0) {
1483 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1484 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1485 return -EIO;
1486 } else if (strlencmp(cmd, "dock") == 0) {
1487 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1488 return -EIO;
1489 } else
1490 return -EINVAL;
1491 }
1492
1493 return 0;
1494 }
1495
1496 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1497 {
1498 .notify = dock_notify,
1499 .handle = &dock_handle,
1500 .type = ACPI_SYSTEM_NOTIFY,
1501 },
1502 {
1503 .hid = IBM_PCI_HID,
1504 .notify = dock_notify,
1505 .handle = &pci_handle,
1506 .type = ACPI_SYSTEM_NOTIFY,
1507 },
1508 };
1509
1510 static struct ibm_struct dock_driver_data[2] = {
1511 {
1512 .name = "dock",
1513 .read = dock_read,
1514 .write = dock_write,
1515 .acpi = &ibm_dock_acpidriver[0],
1516 },
1517 {
1518 .name = "dock",
1519 .acpi = &ibm_dock_acpidriver[1],
1520 },
1521 };
1522
1523 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1524
1525 /*************************************************************************
1526 * Bay subdriver
1527 */
1528
1529 #ifdef CONFIG_THINKPAD_ACPI_BAY
1530 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1531 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1532 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1533 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1534 ); /* A21e, R30, R31 */
1535 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1536 "_EJ0", /* all others */
1537 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1538 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1539 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1540 ); /* all others */
1541 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1542 "_EJ0", /* 770x */
1543 ); /* all others */
1544
1545 static int __init bay_init(struct ibm_init_struct *iibm)
1546 {
1547 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1548
1549 IBM_ACPIHANDLE_INIT(bay);
1550 if (bay_handle)
1551 IBM_ACPIHANDLE_INIT(bay_ej);
1552 IBM_ACPIHANDLE_INIT(bay2);
1553 if (bay2_handle)
1554 IBM_ACPIHANDLE_INIT(bay2_ej);
1555
1556 tp_features.bay_status = bay_handle &&
1557 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1558 tp_features.bay_status2 = bay2_handle &&
1559 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1560
1561 tp_features.bay_eject = bay_handle && bay_ej_handle &&
1562 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1563 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1564 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1565
1566 vdbg_printk(TPACPI_DBG_INIT,
1567 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1568 str_supported(tp_features.bay_status),
1569 str_supported(tp_features.bay_eject),
1570 str_supported(tp_features.bay_status2),
1571 str_supported(tp_features.bay_eject2));
1572
1573 return (tp_features.bay_status || tp_features.bay_eject ||
1574 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1575 }
1576
1577 static void bay_notify(struct ibm_struct *ibm, u32 event)
1578 {
1579 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1580 }
1581
1582 #define bay_occupied(b) (_sta(b##_handle) & 1)
1583
1584 static int bay_read(char *p)
1585 {
1586 int len = 0;
1587 int occupied = bay_occupied(bay);
1588 int occupied2 = bay_occupied(bay2);
1589 int eject, eject2;
1590
1591 len += sprintf(p + len, "status:\t\t%s\n",
1592 tp_features.bay_status ?
1593 (occupied ? "occupied" : "unoccupied") :
1594 "not supported");
1595 if (tp_features.bay_status2)
1596 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1597 "occupied" : "unoccupied");
1598
1599 eject = tp_features.bay_eject && occupied;
1600 eject2 = tp_features.bay_eject2 && occupied2;
1601
1602 if (eject && eject2)
1603 len += sprintf(p + len, "commands:\teject, eject2\n");
1604 else if (eject)
1605 len += sprintf(p + len, "commands:\teject\n");
1606 else if (eject2)
1607 len += sprintf(p + len, "commands:\teject2\n");
1608
1609 return len;
1610 }
1611
1612 static int bay_write(char *buf)
1613 {
1614 char *cmd;
1615
1616 if (!tp_features.bay_eject && !tp_features.bay_eject2)
1617 return -ENODEV;
1618
1619 while ((cmd = next_cmd(&buf))) {
1620 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1621 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1622 return -EIO;
1623 } else if (tp_features.bay_eject2 &&
1624 strlencmp(cmd, "eject2") == 0) {
1625 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1626 return -EIO;
1627 } else
1628 return -EINVAL;
1629 }
1630
1631 return 0;
1632 }
1633
1634 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
1635 .notify = bay_notify,
1636 .handle = &bay_handle,
1637 .type = ACPI_SYSTEM_NOTIFY,
1638 };
1639
1640 static struct ibm_struct bay_driver_data = {
1641 .name = "bay",
1642 .read = bay_read,
1643 .write = bay_write,
1644 .acpi = &ibm_bay_acpidriver,
1645 };
1646
1647 #endif /* CONFIG_THINKPAD_ACPI_BAY */
1648
1649 /*************************************************************************
1650 * CMOS subdriver
1651 */
1652
1653 static int __init cmos_init(struct ibm_init_struct *iibm)
1654 {
1655 vdbg_printk(TPACPI_DBG_INIT,
1656 "initializing cmos commands subdriver\n");
1657
1658 IBM_ACPIHANDLE_INIT(cmos);
1659
1660 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1661 str_supported(cmos_handle != NULL));
1662 return (cmos_handle)? 0 : 1;
1663 }
1664
1665 static int cmos_read(char *p)
1666 {
1667 int len = 0;
1668
1669 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1670 R30, R31, T20-22, X20-21 */
1671 if (!cmos_handle)
1672 len += sprintf(p + len, "status:\t\tnot supported\n");
1673 else {
1674 len += sprintf(p + len, "status:\t\tsupported\n");
1675 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1676 }
1677
1678 return len;
1679 }
1680
1681 static int cmos_write(char *buf)
1682 {
1683 char *cmd;
1684 int cmos_cmd, res;
1685
1686 while ((cmd = next_cmd(&buf))) {
1687 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1688 cmos_cmd >= 0 && cmos_cmd <= 21) {
1689 /* cmos_cmd set */
1690 } else
1691 return -EINVAL;
1692
1693 res = issue_thinkpad_cmos_command(cmos_cmd);
1694 if (res)
1695 return res;
1696 }
1697
1698 return 0;
1699 }
1700
1701 static struct ibm_struct cmos_driver_data = {
1702 .name = "cmos",
1703 .read = cmos_read,
1704 .write = cmos_write,
1705 };
1706
1707 /*************************************************************************
1708 * LED subdriver
1709 */
1710
1711 static enum led_access_mode led_supported;
1712
1713 IBM_HANDLE(led, ec, "SLED", /* 570 */
1714 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1715 "LED", /* all others */
1716 ); /* R30, R31 */
1717
1718 static int __init led_init(struct ibm_init_struct *iibm)
1719 {
1720 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
1721
1722 IBM_ACPIHANDLE_INIT(led);
1723
1724 if (!led_handle)
1725 /* led not supported on R30, R31 */
1726 led_supported = TPACPI_LED_NONE;
1727 else if (strlencmp(led_path, "SLED") == 0)
1728 /* 570 */
1729 led_supported = TPACPI_LED_570;
1730 else if (strlencmp(led_path, "SYSL") == 0)
1731 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1732 led_supported = TPACPI_LED_OLD;
1733 else
1734 /* all others */
1735 led_supported = TPACPI_LED_NEW;
1736
1737 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
1738 str_supported(led_supported), led_supported);
1739
1740 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
1741 }
1742
1743 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1744
1745 static int led_read(char *p)
1746 {
1747 int len = 0;
1748
1749 if (!led_supported) {
1750 len += sprintf(p + len, "status:\t\tnot supported\n");
1751 return len;
1752 }
1753 len += sprintf(p + len, "status:\t\tsupported\n");
1754
1755 if (led_supported == TPACPI_LED_570) {
1756 /* 570 */
1757 int i, status;
1758 for (i = 0; i < 8; i++) {
1759 if (!acpi_evalf(ec_handle,
1760 &status, "GLED", "dd", 1 << i))
1761 return -EIO;
1762 len += sprintf(p + len, "%d:\t\t%s\n",
1763 i, led_status(status));
1764 }
1765 }
1766
1767 len += sprintf(p + len, "commands:\t"
1768 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1769
1770 return len;
1771 }
1772
1773 /* off, on, blink */
1774 static const int led_sled_arg1[] = { 0, 1, 3 };
1775 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1776 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1777 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1778
1779 static int led_write(char *buf)
1780 {
1781 char *cmd;
1782 int led, ind, ret;
1783
1784 if (!led_supported)
1785 return -ENODEV;
1786
1787 while ((cmd = next_cmd(&buf))) {
1788 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1789 return -EINVAL;
1790
1791 if (strstr(cmd, "off")) {
1792 ind = 0;
1793 } else if (strstr(cmd, "on")) {
1794 ind = 1;
1795 } else if (strstr(cmd, "blink")) {
1796 ind = 2;
1797 } else
1798 return -EINVAL;
1799
1800 if (led_supported == TPACPI_LED_570) {
1801 /* 570 */
1802 led = 1 << led;
1803 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1804 led, led_sled_arg1[ind]))
1805 return -EIO;
1806 } else if (led_supported == TPACPI_LED_OLD) {
1807 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1808 led = 1 << led;
1809 ret = ec_write(TPACPI_LED_EC_HLMS, led);
1810 if (ret >= 0)
1811 ret =
1812 ec_write(TPACPI_LED_EC_HLBL,
1813 led * led_exp_hlbl[ind]);
1814 if (ret >= 0)
1815 ret =
1816 ec_write(TPACPI_LED_EC_HLCL,
1817 led * led_exp_hlcl[ind]);
1818 if (ret < 0)
1819 return ret;
1820 } else {
1821 /* all others */
1822 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1823 led, led_led_arg1[ind]))
1824 return -EIO;
1825 }
1826 }
1827
1828 return 0;
1829 }
1830
1831 static struct ibm_struct led_driver_data = {
1832 .name = "led",
1833 .read = led_read,
1834 .write = led_write,
1835 };
1836
1837 /*************************************************************************
1838 * Beep subdriver
1839 */
1840
1841 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
1842
1843 static int __init beep_init(struct ibm_init_struct *iibm)
1844 {
1845 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
1846
1847 IBM_ACPIHANDLE_INIT(beep);
1848
1849 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
1850 str_supported(beep_handle != NULL));
1851
1852 return (beep_handle)? 0 : 1;
1853 }
1854
1855 static int beep_read(char *p)
1856 {
1857 int len = 0;
1858
1859 if (!beep_handle)
1860 len += sprintf(p + len, "status:\t\tnot supported\n");
1861 else {
1862 len += sprintf(p + len, "status:\t\tsupported\n");
1863 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1864 }
1865
1866 return len;
1867 }
1868
1869 static int beep_write(char *buf)
1870 {
1871 char *cmd;
1872 int beep_cmd;
1873
1874 if (!beep_handle)
1875 return -ENODEV;
1876
1877 while ((cmd = next_cmd(&buf))) {
1878 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1879 beep_cmd >= 0 && beep_cmd <= 17) {
1880 /* beep_cmd set */
1881 } else
1882 return -EINVAL;
1883 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1884 return -EIO;
1885 }
1886
1887 return 0;
1888 }
1889
1890 static struct ibm_struct beep_driver_data = {
1891 .name = "beep",
1892 .read = beep_read,
1893 .write = beep_write,
1894 };
1895
1896 /*************************************************************************
1897 * Thermal subdriver
1898 */
1899
1900 static enum thermal_access_mode thermal_read_mode;
1901
1902 static int __init thermal_init(struct ibm_init_struct *iibm)
1903 {
1904 u8 t, ta1, ta2;
1905 int i;
1906 int acpi_tmp7;
1907
1908 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
1909
1910 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1911
1912 if (ibm_thinkpad_ec_found && experimental) {
1913 /*
1914 * Direct EC access mode: sensors at registers
1915 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1916 * non-implemented, thermal sensors return 0x80 when
1917 * not available
1918 */
1919
1920 ta1 = ta2 = 0;
1921 for (i = 0; i < 8; i++) {
1922 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
1923 ta1 |= t;
1924 } else {
1925 ta1 = 0;
1926 break;
1927 }
1928 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
1929 ta2 |= t;
1930 } else {
1931 ta1 = 0;
1932 break;
1933 }
1934 }
1935 if (ta1 == 0) {
1936 /* This is sheer paranoia, but we handle it anyway */
1937 if (acpi_tmp7) {
1938 printk(IBM_ERR
1939 "ThinkPad ACPI EC access misbehaving, "
1940 "falling back to ACPI TMPx access mode\n");
1941 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1942 } else {
1943 printk(IBM_ERR
1944 "ThinkPad ACPI EC access misbehaving, "
1945 "disabling thermal sensors access\n");
1946 thermal_read_mode = TPACPI_THERMAL_NONE;
1947 }
1948 } else {
1949 thermal_read_mode =
1950 (ta2 != 0) ?
1951 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
1952 }
1953 } else if (acpi_tmp7) {
1954 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1955 /* 600e/x, 770e, 770x */
1956 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
1957 } else {
1958 /* Standard ACPI TMPx access, max 8 sensors */
1959 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1960 }
1961 } else {
1962 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1963 thermal_read_mode = TPACPI_THERMAL_NONE;
1964 }
1965
1966 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
1967 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
1968 thermal_read_mode);
1969
1970 return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
1971 }
1972
1973 /* idx is zero-based */
1974 static int thermal_get_sensor(int idx, s32 *value)
1975 {
1976 int t;
1977 s8 tmp;
1978 char tmpi[5];
1979
1980 t = TP_EC_THERMAL_TMP0;
1981
1982 switch (thermal_read_mode) {
1983 #if TPACPI_MAX_THERMAL_SENSORS >= 16
1984 case TPACPI_THERMAL_TPEC_16:
1985 if (idx >= 8 && idx <= 15) {
1986 t = TP_EC_THERMAL_TMP8;
1987 idx -= 8;
1988 }
1989 /* fallthrough */
1990 #endif
1991 case TPACPI_THERMAL_TPEC_8:
1992 if (idx <= 7) {
1993 if (!acpi_ec_read(t + idx, &tmp))
1994 return -EIO;
1995 *value = tmp * 1000;
1996 return 0;
1997 }
1998 break;
1999
2000 case TPACPI_THERMAL_ACPI_UPDT:
2001 if (idx <= 7) {
2002 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2003 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2004 return -EIO;
2005 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2006 return -EIO;
2007 *value = (t - 2732) * 100;
2008 return 0;
2009 }
2010 break;
2011
2012 case TPACPI_THERMAL_ACPI_TMP07:
2013 if (idx <= 7) {
2014 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2015 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2016 return -EIO;
2017 *value = t * 1000;
2018 return 0;
2019 }
2020 break;
2021
2022 case TPACPI_THERMAL_NONE:
2023 default:
2024 return -ENOSYS;
2025 }
2026
2027 return -EINVAL;
2028 }
2029
2030 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2031 {
2032 int res, i;
2033 int n;
2034
2035 n = 8;
2036 i = 0;
2037
2038 if (!s)
2039 return -EINVAL;
2040
2041 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2042 n = 16;
2043
2044 for(i = 0 ; i < n; i++) {
2045 res = thermal_get_sensor(i, &s->temp[i]);
2046 if (res)
2047 return res;
2048 }
2049
2050 return n;
2051 }
2052
2053 static int thermal_read(char *p)
2054 {
2055 int len = 0;
2056 int n, i;
2057 struct ibm_thermal_sensors_struct t;
2058
2059 n = thermal_get_sensors(&t);
2060 if (unlikely(n < 0))
2061 return n;
2062
2063 len += sprintf(p + len, "temperatures:\t");
2064
2065 if (n > 0) {
2066 for (i = 0; i < (n - 1); i++)
2067 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2068 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2069 } else
2070 len += sprintf(p + len, "not supported\n");
2071
2072 return len;
2073 }
2074
2075 static struct ibm_struct thermal_driver_data = {
2076 .name = "thermal",
2077 .read = thermal_read,
2078 };
2079
2080 /*************************************************************************
2081 * EC Dump subdriver
2082 */
2083
2084 static u8 ecdump_regs[256];
2085
2086 static int ecdump_read(char *p)
2087 {
2088 int len = 0;
2089 int i, j;
2090 u8 v;
2091
2092 len += sprintf(p + len, "EC "
2093 " +00 +01 +02 +03 +04 +05 +06 +07"
2094 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2095 for (i = 0; i < 256; i += 16) {
2096 len += sprintf(p + len, "EC 0x%02x:", i);
2097 for (j = 0; j < 16; j++) {
2098 if (!acpi_ec_read(i + j, &v))
2099 break;
2100 if (v != ecdump_regs[i + j])
2101 len += sprintf(p + len, " *%02x", v);
2102 else
2103 len += sprintf(p + len, " %02x", v);
2104 ecdump_regs[i + j] = v;
2105 }
2106 len += sprintf(p + len, "\n");
2107 if (j != 16)
2108 break;
2109 }
2110
2111 /* These are way too dangerous to advertise openly... */
2112 #if 0
2113 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2114 " (<offset> is 00-ff, <value> is 00-ff)\n");
2115 len += sprintf(p + len, "commands:\t0x<offset> <value> "
2116 " (<offset> is 00-ff, <value> is 0-255)\n");
2117 #endif
2118 return len;
2119 }
2120
2121 static int ecdump_write(char *buf)
2122 {
2123 char *cmd;
2124 int i, v;
2125
2126 while ((cmd = next_cmd(&buf))) {
2127 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2128 /* i and v set */
2129 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2130 /* i and v set */
2131 } else
2132 return -EINVAL;
2133 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2134 if (!acpi_ec_write(i, v))
2135 return -EIO;
2136 } else
2137 return -EINVAL;
2138 }
2139
2140 return 0;
2141 }
2142
2143 static struct ibm_struct ecdump_driver_data = {
2144 .name = "ecdump",
2145 .read = ecdump_read,
2146 .write = ecdump_write,
2147 .flags.experimental = 1,
2148 };
2149
2150 /*************************************************************************
2151 * Backlight/brightness subdriver
2152 */
2153
2154 static struct backlight_device *ibm_backlight_device = NULL;
2155
2156 static struct backlight_ops ibm_backlight_data = {
2157 .get_brightness = brightness_get,
2158 .update_status = brightness_update_status,
2159 };
2160
2161 static int __init brightness_init(struct ibm_init_struct *iibm)
2162 {
2163 int b;
2164
2165 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2166
2167 b = brightness_get(NULL);
2168 if (b < 0)
2169 return b;
2170
2171 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
2172 &ibm_backlight_data);
2173 if (IS_ERR(ibm_backlight_device)) {
2174 printk(IBM_ERR "Could not register backlight device\n");
2175 return PTR_ERR(ibm_backlight_device);
2176 }
2177 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2178
2179 ibm_backlight_device->props.max_brightness = 7;
2180 ibm_backlight_device->props.brightness = b;
2181 backlight_update_status(ibm_backlight_device);
2182
2183 return 0;
2184 }
2185
2186 static void brightness_exit(void)
2187 {
2188 if (ibm_backlight_device) {
2189 vdbg_printk(TPACPI_DBG_EXIT,
2190 "calling backlight_device_unregister()\n");
2191 backlight_device_unregister(ibm_backlight_device);
2192 ibm_backlight_device = NULL;
2193 }
2194 }
2195
2196 static int brightness_update_status(struct backlight_device *bd)
2197 {
2198 return brightness_set(
2199 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2200 bd->props.power == FB_BLANK_UNBLANK) ?
2201 bd->props.brightness : 0);
2202 }
2203
2204 static int brightness_get(struct backlight_device *bd)
2205 {
2206 u8 level;
2207 if (!acpi_ec_read(brightness_offset, &level))
2208 return -EIO;
2209
2210 level &= 0x7;
2211
2212 return level;
2213 }
2214
2215 static int brightness_set(int value)
2216 {
2217 int cmos_cmd, inc, i;
2218 int current_value = brightness_get(NULL);
2219
2220 value &= 7;
2221
2222 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2223 inc = value > current_value ? 1 : -1;
2224 for (i = current_value; i != value; i += inc) {
2225 if (issue_thinkpad_cmos_command(cmos_cmd))
2226 return -EIO;
2227 if (!acpi_ec_write(brightness_offset, i + inc))
2228 return -EIO;
2229 }
2230
2231 return 0;
2232 }
2233
2234 static int brightness_read(char *p)
2235 {
2236 int len = 0;
2237 int level;
2238
2239 if ((level = brightness_get(NULL)) < 0) {
2240 len += sprintf(p + len, "level:\t\tunreadable\n");
2241 } else {
2242 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2243 len += sprintf(p + len, "commands:\tup, down\n");
2244 len += sprintf(p + len, "commands:\tlevel <level>"
2245 " (<level> is 0-7)\n");
2246 }
2247
2248 return len;
2249 }
2250
2251 static int brightness_write(char *buf)
2252 {
2253 int level;
2254 int new_level;
2255 char *cmd;
2256
2257 while ((cmd = next_cmd(&buf))) {
2258 if ((level = brightness_get(NULL)) < 0)
2259 return level;
2260 level &= 7;
2261
2262 if (strlencmp(cmd, "up") == 0) {
2263 new_level = level == 7 ? 7 : level + 1;
2264 } else if (strlencmp(cmd, "down") == 0) {
2265 new_level = level == 0 ? 0 : level - 1;
2266 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2267 new_level >= 0 && new_level <= 7) {
2268 /* new_level set */
2269 } else
2270 return -EINVAL;
2271
2272 brightness_set(new_level);
2273 }
2274
2275 return 0;
2276 }
2277
2278 static struct ibm_struct brightness_driver_data = {
2279 .name = "brightness",
2280 .read = brightness_read,
2281 .write = brightness_write,
2282 .exit = brightness_exit,
2283 };
2284
2285 /*************************************************************************
2286 * Volume subdriver
2287 */
2288
2289 static int volume_read(char *p)
2290 {
2291 int len = 0;
2292 u8 level;
2293
2294 if (!acpi_ec_read(volume_offset, &level)) {
2295 len += sprintf(p + len, "level:\t\tunreadable\n");
2296 } else {
2297 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2298 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2299 len += sprintf(p + len, "commands:\tup, down, mute\n");
2300 len += sprintf(p + len, "commands:\tlevel <level>"
2301 " (<level> is 0-15)\n");
2302 }
2303
2304 return len;
2305 }
2306
2307 static int volume_write(char *buf)
2308 {
2309 int cmos_cmd, inc, i;
2310 u8 level, mute;
2311 int new_level, new_mute;
2312 char *cmd;
2313
2314 while ((cmd = next_cmd(&buf))) {
2315 if (!acpi_ec_read(volume_offset, &level))
2316 return -EIO;
2317 new_mute = mute = level & 0x40;
2318 new_level = level = level & 0xf;
2319
2320 if (strlencmp(cmd, "up") == 0) {
2321 if (mute)
2322 new_mute = 0;
2323 else
2324 new_level = level == 15 ? 15 : level + 1;
2325 } else if (strlencmp(cmd, "down") == 0) {
2326 if (mute)
2327 new_mute = 0;
2328 else
2329 new_level = level == 0 ? 0 : level - 1;
2330 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2331 new_level >= 0 && new_level <= 15) {
2332 /* new_level set */
2333 } else if (strlencmp(cmd, "mute") == 0) {
2334 new_mute = 0x40;
2335 } else
2336 return -EINVAL;
2337
2338 if (new_level != level) { /* mute doesn't change */
2339 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2340 inc = new_level > level ? 1 : -1;
2341
2342 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2343 !acpi_ec_write(volume_offset, level)))
2344 return -EIO;
2345
2346 for (i = level; i != new_level; i += inc)
2347 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2348 !acpi_ec_write(volume_offset, i + inc))
2349 return -EIO;
2350
2351 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2352 !acpi_ec_write(volume_offset,
2353 new_level + mute)))
2354 return -EIO;
2355 }
2356
2357 if (new_mute != mute) { /* level doesn't change */
2358 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2359
2360 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2361 !acpi_ec_write(volume_offset, level + new_mute))
2362 return -EIO;
2363 }
2364 }
2365
2366 return 0;
2367 }
2368
2369 static struct ibm_struct volume_driver_data = {
2370 .name = "volume",
2371 .read = volume_read,
2372 .write = volume_write,
2373 };
2374
2375 /*************************************************************************
2376 * Fan subdriver
2377 */
2378
2379 /*
2380 * FAN ACCESS MODES
2381 *
2382 * TPACPI_FAN_RD_ACPI_GFAN:
2383 * ACPI GFAN method: returns fan level
2384 *
2385 * see TPACPI_FAN_WR_ACPI_SFAN
2386 * EC 0x2f (HFSP) not available if GFAN exists
2387 *
2388 * TPACPI_FAN_WR_ACPI_SFAN:
2389 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2390 *
2391 * EC 0x2f (HFSP) might be available *for reading*, but do not use
2392 * it for writing.
2393 *
2394 * TPACPI_FAN_WR_TPEC:
2395 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
2396 * Supported on almost all ThinkPads
2397 *
2398 * Fan speed changes of any sort (including those caused by the
2399 * disengaged mode) are usually done slowly by the firmware as the
2400 * maximum ammount of fan duty cycle change per second seems to be
2401 * limited.
2402 *
2403 * Reading is not available if GFAN exists.
2404 * Writing is not available if SFAN exists.
2405 *
2406 * Bits
2407 * 7 automatic mode engaged;
2408 * (default operation mode of the ThinkPad)
2409 * fan level is ignored in this mode.
2410 * 6 full speed mode (takes precedence over bit 7);
2411 * not available on all thinkpads. May disable
2412 * the tachometer while the fan controller ramps up
2413 * the speed (which can take up to a few *minutes*).
2414 * Speeds up fan to 100% duty-cycle, which is far above
2415 * the standard RPM levels. It is not impossible that
2416 * it could cause hardware damage.
2417 * 5-3 unused in some models. Extra bits for fan level
2418 * in others, but still useless as all values above
2419 * 7 map to the same speed as level 7 in these models.
2420 * 2-0 fan level (0..7 usually)
2421 * 0x00 = stop
2422 * 0x07 = max (set when temperatures critical)
2423 * Some ThinkPads may have other levels, see
2424 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2425 *
2426 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2427 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2428 * does so, its initial value is meaningless (0x07).
2429 *
2430 * For firmware bugs, refer to:
2431 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2432 *
2433 * ----
2434 *
2435 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2436 * Main fan tachometer reading (in RPM)
2437 *
2438 * This register is present on all ThinkPads with a new-style EC, and
2439 * it is known not to be present on the A21m/e, and T22, as there is
2440 * something else in offset 0x84 according to the ACPI DSDT. Other
2441 * ThinkPads from this same time period (and earlier) probably lack the
2442 * tachometer as well.
2443 *
2444 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2445 * was never fixed by IBM to report the EC firmware version string
2446 * probably support the tachometer (like the early X models), so
2447 * detecting it is quite hard. We need more data to know for sure.
2448 *
2449 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2450 * might result.
2451 *
2452 * FIRMWARE BUG: may go stale while the EC is switching to full speed
2453 * mode.
2454 *
2455 * For firmware bugs, refer to:
2456 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2457 *
2458 * TPACPI_FAN_WR_ACPI_FANS:
2459 * ThinkPad X31, X40, X41. Not available in the X60.
2460 *
2461 * FANS ACPI handle: takes three arguments: low speed, medium speed,
2462 * high speed. ACPI DSDT seems to map these three speeds to levels
2463 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2464 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2465 *
2466 * The speeds are stored on handles
2467 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2468 *
2469 * There are three default speed sets, acessible as handles:
2470 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2471 *
2472 * ACPI DSDT switches which set is in use depending on various
2473 * factors.
2474 *
2475 * TPACPI_FAN_WR_TPEC is also available and should be used to
2476 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
2477 * but the ACPI tables just mention level 7.
2478 */
2479
2480 static enum fan_status_access_mode fan_status_access_mode;
2481 static enum fan_control_access_mode fan_control_access_mode;
2482 static enum fan_control_commands fan_control_commands;
2483
2484 static u8 fan_control_initial_status;
2485
2486 static void fan_watchdog_fire(struct work_struct *ignored);
2487 static int fan_watchdog_maxinterval;
2488 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
2489
2490 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
2491 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
2492 "\\FSPD", /* 600e/x, 770e, 770x */
2493 ); /* all others */
2494 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
2495 "JFNS", /* 770x-JL */
2496 ); /* all others */
2497
2498 static int __init fan_init(struct ibm_init_struct *iibm)
2499 {
2500 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
2501
2502 fan_status_access_mode = TPACPI_FAN_NONE;
2503 fan_control_access_mode = TPACPI_FAN_WR_NONE;
2504 fan_control_commands = 0;
2505 fan_watchdog_maxinterval = 0;
2506 tp_features.fan_ctrl_status_undef = 0;
2507
2508 IBM_ACPIHANDLE_INIT(fans);
2509 IBM_ACPIHANDLE_INIT(gfan);
2510 IBM_ACPIHANDLE_INIT(sfan);
2511
2512 if (gfan_handle) {
2513 /* 570, 600e/x, 770e, 770x */
2514 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
2515 } else {
2516 /* all other ThinkPads: note that even old-style
2517 * ThinkPad ECs supports the fan control register */
2518 if (likely(acpi_ec_read(fan_status_offset,
2519 &fan_control_initial_status))) {
2520 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
2521
2522 /* In some ThinkPads, neither the EC nor the ACPI
2523 * DSDT initialize the fan status, and it ends up
2524 * being set to 0x07 when it *could* be either
2525 * 0x07 or 0x80.
2526 *
2527 * Enable for TP-1Y (T43), TP-78 (R51e),
2528 * TP-76 (R52), TP-70 (T43, R52), which are known
2529 * to be buggy. */
2530 if (fan_control_initial_status == 0x07 &&
2531 ibm_thinkpad_ec_found &&
2532 ((ibm_thinkpad_ec_found[0] == '1' &&
2533 ibm_thinkpad_ec_found[1] == 'Y') ||
2534 (ibm_thinkpad_ec_found[0] == '7' &&
2535 (ibm_thinkpad_ec_found[1] == '6' ||
2536 ibm_thinkpad_ec_found[1] == '8' ||
2537 ibm_thinkpad_ec_found[1] == '0'))
2538 )) {
2539 printk(IBM_NOTICE
2540 "fan_init: initial fan status is "
2541 "unknown, assuming it is in auto "
2542 "mode\n");
2543 tp_features.fan_ctrl_status_undef = 1;
2544 }
2545 } else {
2546 printk(IBM_ERR
2547 "ThinkPad ACPI EC access misbehaving, "
2548 "fan status and control unavailable\n");
2549 return 1;
2550 }
2551 }
2552
2553 if (sfan_handle) {
2554 /* 570, 770x-JL */
2555 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
2556 fan_control_commands |=
2557 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
2558 } else {
2559 if (!gfan_handle) {
2560 /* gfan without sfan means no fan control */
2561 /* all other models implement TP EC 0x2f control */
2562
2563 if (fans_handle) {
2564 /* X31, X40, X41 */
2565 fan_control_access_mode =
2566 TPACPI_FAN_WR_ACPI_FANS;
2567 fan_control_commands |=
2568 TPACPI_FAN_CMD_SPEED |
2569 TPACPI_FAN_CMD_LEVEL |
2570 TPACPI_FAN_CMD_ENABLE;
2571 } else {
2572 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
2573 fan_control_commands |=
2574 TPACPI_FAN_CMD_LEVEL |
2575 TPACPI_FAN_CMD_ENABLE;
2576 }
2577 }
2578 }
2579
2580 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
2581 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
2582 fan_control_access_mode != TPACPI_FAN_WR_NONE),
2583 fan_status_access_mode, fan_control_access_mode);
2584
2585 return (fan_status_access_mode != TPACPI_FAN_NONE ||
2586 fan_control_access_mode != TPACPI_FAN_WR_NONE)?
2587 0 : 1;
2588 }
2589
2590 static int fan_get_status(u8 *status)
2591 {
2592 u8 s;
2593
2594 /* TODO:
2595 * Add TPACPI_FAN_RD_ACPI_FANS ? */
2596
2597 switch (fan_status_access_mode) {
2598 case TPACPI_FAN_RD_ACPI_GFAN:
2599 /* 570, 600e/x, 770e, 770x */
2600
2601 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
2602 return -EIO;
2603
2604 if (likely(status))
2605 *status = s & 0x07;
2606
2607 break;
2608
2609 case TPACPI_FAN_RD_TPEC:
2610 /* all except 570, 600e/x, 770e, 770x */
2611 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
2612 return -EIO;
2613
2614 if (likely(status))
2615 *status = s;
2616
2617 break;
2618
2619 default:
2620 return -ENXIO;
2621 }
2622
2623 return 0;
2624 }
2625
2626 static void fan_exit(void)
2627 {
2628 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
2629 cancel_delayed_work(&fan_watchdog_task);
2630 flush_scheduled_work();
2631 }
2632
2633 static int fan_get_speed(unsigned int *speed)
2634 {
2635 u8 hi, lo;
2636
2637 switch (fan_status_access_mode) {
2638 case TPACPI_FAN_RD_TPEC:
2639 /* all except 570, 600e/x, 770e, 770x */
2640 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
2641 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
2642 return -EIO;
2643
2644 if (likely(speed))
2645 *speed = (hi << 8) | lo;
2646
2647 break;
2648
2649 default:
2650 return -ENXIO;
2651 }
2652
2653 return 0;
2654 }
2655
2656 static void fan_watchdog_fire(struct work_struct *ignored)
2657 {
2658 int rc;
2659
2660 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2661 rc = fan_set_enable();
2662 if (rc < 0) {
2663 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
2664 "will try again later...\n", -rc);
2665 /* reschedule for later */
2666 fan_watchdog_reset();
2667 }
2668 }
2669
2670 static void fan_watchdog_reset(void)
2671 {
2672 static int fan_watchdog_active = 0;
2673
2674 if (fan_watchdog_active)
2675 cancel_delayed_work(&fan_watchdog_task);
2676
2677 if (fan_watchdog_maxinterval > 0) {
2678 fan_watchdog_active = 1;
2679 if (!schedule_delayed_work(&fan_watchdog_task,
2680 msecs_to_jiffies(fan_watchdog_maxinterval
2681 * 1000))) {
2682 printk(IBM_ERR "failed to schedule the fan watchdog, "
2683 "watchdog will not trigger\n");
2684 }
2685 } else
2686 fan_watchdog_active = 0;
2687 }
2688
2689 static int fan_set_level(int level)
2690 {
2691 switch (fan_control_access_mode) {
2692 case TPACPI_FAN_WR_ACPI_SFAN:
2693 if (level >= 0 && level <= 7) {
2694 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2695 return -EIO;
2696 } else
2697 return -EINVAL;
2698 break;
2699
2700 case TPACPI_FAN_WR_ACPI_FANS:
2701 case TPACPI_FAN_WR_TPEC:
2702 if ((level != TP_EC_FAN_AUTO) &&
2703 (level != TP_EC_FAN_FULLSPEED) &&
2704 ((level < 0) || (level > 7)))
2705 return -EINVAL;
2706
2707 if (!acpi_ec_write(fan_status_offset, level))
2708 return -EIO;
2709 else
2710 tp_features.fan_ctrl_status_undef = 0;
2711 break;
2712
2713 default:
2714 return -ENXIO;
2715 }
2716 return 0;
2717 }
2718
2719 static int fan_set_enable(void)
2720 {
2721 u8 s;
2722 int rc;
2723
2724 switch (fan_control_access_mode) {
2725 case TPACPI_FAN_WR_ACPI_FANS:
2726 case TPACPI_FAN_WR_TPEC:
2727 if ((rc = fan_get_status(&s)) < 0)
2728 return rc;
2729
2730 /* Don't go out of emergency fan mode */
2731 if (s != 7)
2732 s = TP_EC_FAN_AUTO;
2733
2734 if (!acpi_ec_write(fan_status_offset, s))
2735 return -EIO;
2736 else
2737 tp_features.fan_ctrl_status_undef = 0;
2738 break;
2739
2740 case TPACPI_FAN_WR_ACPI_SFAN:
2741 if ((rc = fan_get_status(&s)) < 0)
2742 return rc;
2743
2744 s &= 0x07;
2745
2746 /* Set fan to at least level 4 */
2747 if (s < 4)
2748 s = 4;
2749
2750 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2751 return -EIO;
2752 break;
2753
2754 default:
2755 return -ENXIO;
2756 }
2757 return 0;
2758 }
2759
2760 static int fan_set_disable(void)
2761 {
2762 switch (fan_control_access_mode) {
2763 case TPACPI_FAN_WR_ACPI_FANS:
2764 case TPACPI_FAN_WR_TPEC:
2765 if (!acpi_ec_write(fan_status_offset, 0x00))
2766 return -EIO;
2767 else
2768 tp_features.fan_ctrl_status_undef = 0;
2769 break;
2770
2771 case TPACPI_FAN_WR_ACPI_SFAN:
2772 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2773 return -EIO;
2774 break;
2775
2776 default:
2777 return -ENXIO;
2778 }
2779 return 0;
2780 }
2781
2782 static int fan_set_speed(int speed)
2783 {
2784 switch (fan_control_access_mode) {
2785 case TPACPI_FAN_WR_ACPI_FANS:
2786 if (speed >= 0 && speed <= 65535) {
2787 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2788 speed, speed, speed))
2789 return -EIO;
2790 } else
2791 return -EINVAL;
2792 break;
2793
2794 default:
2795 return -ENXIO;
2796 }
2797 return 0;
2798 }
2799
2800 static int fan_read(char *p)
2801 {
2802 int len = 0;
2803 int rc;
2804 u8 status;
2805 unsigned int speed = 0;
2806
2807 switch (fan_status_access_mode) {
2808 case TPACPI_FAN_RD_ACPI_GFAN:
2809 /* 570, 600e/x, 770e, 770x */
2810 if ((rc = fan_get_status(&status)) < 0)
2811 return rc;
2812
2813 len += sprintf(p + len, "status:\t\t%s\n"
2814 "level:\t\t%d\n",
2815 (status != 0) ? "enabled" : "disabled", status);
2816 break;
2817
2818 case TPACPI_FAN_RD_TPEC:
2819 /* all except 570, 600e/x, 770e, 770x */
2820 if ((rc = fan_get_status(&status)) < 0)
2821 return rc;
2822
2823 if (unlikely(tp_features.fan_ctrl_status_undef)) {
2824 if (status != fan_control_initial_status)
2825 tp_features.fan_ctrl_status_undef = 0;
2826 else
2827 /* Return most likely status. In fact, it
2828 * might be the only possible status */
2829 status = TP_EC_FAN_AUTO;
2830 }
2831
2832 len += sprintf(p + len, "status:\t\t%s\n",
2833 (status != 0) ? "enabled" : "disabled");
2834
2835 if ((rc = fan_get_speed(&speed)) < 0)
2836 return rc;
2837
2838 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2839
2840 if (status & TP_EC_FAN_FULLSPEED)
2841 /* Disengaged mode takes precedence */
2842 len += sprintf(p + len, "level:\t\tdisengaged\n");
2843 else if (status & TP_EC_FAN_AUTO)
2844 len += sprintf(p + len, "level:\t\tauto\n");
2845 else
2846 len += sprintf(p + len, "level:\t\t%d\n", status);
2847 break;
2848
2849 case TPACPI_FAN_NONE:
2850 default:
2851 len += sprintf(p + len, "status:\t\tnot supported\n");
2852 }
2853
2854 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
2855 len += sprintf(p + len, "commands:\tlevel <level>");
2856
2857 switch (fan_control_access_mode) {
2858 case TPACPI_FAN_WR_ACPI_SFAN:
2859 len += sprintf(p + len, " (<level> is 0-7)\n");
2860 break;
2861
2862 default:
2863 len += sprintf(p + len, " (<level> is 0-7, "
2864 "auto, disengaged)\n");
2865 break;
2866 }
2867 }
2868
2869 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
2870 len += sprintf(p + len, "commands:\tenable, disable\n"
2871 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2872 "1-120 (seconds))\n");
2873
2874 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
2875 len += sprintf(p + len, "commands:\tspeed <speed>"
2876 " (<speed> is 0-65535)\n");
2877
2878 return len;
2879 }
2880
2881 static int fan_write_cmd_level(const char *cmd, int *rc)
2882 {
2883 int level;
2884
2885 if (strlencmp(cmd, "level auto") == 0)
2886 level = TP_EC_FAN_AUTO;
2887 else if (strlencmp(cmd, "level disengaged") == 0)
2888 level = TP_EC_FAN_FULLSPEED;
2889 else if (sscanf(cmd, "level %d", &level) != 1)
2890 return 0;
2891
2892 if ((*rc = fan_set_level(level)) == -ENXIO)
2893 printk(IBM_ERR "level command accepted for unsupported "
2894 "access mode %d", fan_control_access_mode);
2895
2896 return 1;
2897 }
2898
2899 static int fan_write_cmd_enable(const char *cmd, int *rc)
2900 {
2901 if (strlencmp(cmd, "enable") != 0)
2902 return 0;
2903
2904 if ((*rc = fan_set_enable()) == -ENXIO)
2905 printk(IBM_ERR "enable command accepted for unsupported "
2906 "access mode %d", fan_control_access_mode);
2907
2908 return 1;
2909 }
2910
2911 static int fan_write_cmd_disable(const char *cmd, int *rc)
2912 {
2913 if (strlencmp(cmd, "disable") != 0)
2914 return 0;
2915
2916 if ((*rc = fan_set_disable()) == -ENXIO)
2917 printk(IBM_ERR "disable command accepted for unsupported "
2918 "access mode %d", fan_control_access_mode);
2919
2920 return 1;
2921 }
2922
2923 static int fan_write_cmd_speed(const char *cmd, int *rc)
2924 {
2925 int speed;
2926
2927 /* TODO:
2928 * Support speed <low> <medium> <high> ? */
2929
2930 if (sscanf(cmd, "speed %d", &speed) != 1)
2931 return 0;
2932
2933 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2934 printk(IBM_ERR "speed command accepted for unsupported "
2935 "access mode %d", fan_control_access_mode);
2936
2937 return 1;
2938 }
2939
2940 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2941 {
2942 int interval;
2943
2944 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2945 return 0;
2946
2947 if (interval < 0 || interval > 120)
2948 *rc = -EINVAL;
2949 else
2950 fan_watchdog_maxinterval = interval;
2951
2952 return 1;
2953 }
2954
2955 static int fan_write(char *buf)
2956 {
2957 char *cmd;
2958 int rc = 0;
2959
2960 while (!rc && (cmd = next_cmd(&buf))) {
2961 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
2962 fan_write_cmd_level(cmd, &rc)) &&
2963 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
2964 (fan_write_cmd_enable(cmd, &rc) ||
2965 fan_write_cmd_disable(cmd, &rc) ||
2966 fan_write_cmd_watchdog(cmd, &rc))) &&
2967 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
2968 fan_write_cmd_speed(cmd, &rc))
2969 )
2970 rc = -EINVAL;
2971 else if (!rc)
2972 fan_watchdog_reset();
2973 }
2974
2975 return rc;
2976 }
2977
2978 static struct ibm_struct fan_driver_data = {
2979 .name = "fan",
2980 .read = fan_read,
2981 .write = fan_write,
2982 .exit = fan_exit,
2983 .flags.experimental = 1,
2984 };
2985
2986 /****************************************************************************
2987 ****************************************************************************
2988 *
2989 * Infrastructure
2990 *
2991 ****************************************************************************
2992 ****************************************************************************/
2993
2994 /* /proc support */
2995 static struct proc_dir_entry *proc_dir = NULL;
2996
2997 /* Subdriver registry */
2998 static LIST_HEAD(tpacpi_all_drivers);
2999
3000
3001 /*
3002 * Module and infrastructure proble, init and exit handling
3003 */
3004
3005 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
3006 static const char * __init str_supported(int is_supported)
3007 {
3008 static char text_unsupported[] __initdata = "not supported";
3009
3010 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
3011 }
3012 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3013
3014 static int __init ibm_init(struct ibm_init_struct *iibm)
3015 {
3016 int ret;
3017 struct ibm_struct *ibm = iibm->data;
3018 struct proc_dir_entry *entry;
3019
3020 BUG_ON(ibm == NULL);
3021
3022 INIT_LIST_HEAD(&ibm->all_drivers);
3023
3024 if (ibm->flags.experimental && !experimental)
3025 return 0;
3026
3027 dbg_printk(TPACPI_DBG_INIT,
3028 "probing for %s\n", ibm->name);
3029
3030 if (iibm->init) {
3031 ret = iibm->init(iibm);
3032 if (ret > 0)
3033 return 0; /* probe failed */
3034 if (ret)
3035 return ret;
3036
3037 ibm->flags.init_called = 1;
3038 }
3039
3040 if (ibm->acpi) {
3041 if (ibm->acpi->hid) {
3042 ret = register_tpacpi_subdriver(ibm);
3043 if (ret)
3044 goto err_out;
3045 }
3046
3047 if (ibm->acpi->notify) {
3048 ret = setup_acpi_notify(ibm);
3049 if (ret == -ENODEV) {
3050 printk(IBM_NOTICE "disabling subdriver %s\n",
3051 ibm->name);
3052 ret = 0;
3053 goto err_out;
3054 }
3055 if (ret < 0)
3056 goto err_out;
3057 }
3058 }
3059
3060 dbg_printk(TPACPI_DBG_INIT,
3061 "%s installed\n", ibm->name);
3062
3063 if (ibm->read) {
3064 entry = create_proc_entry(ibm->name,
3065 S_IFREG | S_IRUGO | S_IWUSR,
3066 proc_dir);
3067 if (!entry) {
3068 printk(IBM_ERR "unable to create proc entry %s\n",
3069 ibm->name);
3070 ret = -ENODEV;
3071 goto err_out;
3072 }
3073 entry->owner = THIS_MODULE;
3074 entry->data = ibm;
3075 entry->read_proc = &dispatch_procfs_read;
3076 if (ibm->write)
3077 entry->write_proc = &dispatch_procfs_write;
3078 ibm->flags.proc_created = 1;
3079 }
3080
3081 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
3082
3083 return 0;
3084
3085 err_out:
3086 dbg_printk(TPACPI_DBG_INIT,
3087 "%s: at error exit path with result %d\n",
3088 ibm->name, ret);
3089
3090 ibm_exit(ibm);
3091 return (ret < 0)? ret : 0;
3092 }
3093
3094 static void ibm_exit(struct ibm_struct *ibm)
3095 {
3096 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
3097
3098 list_del_init(&ibm->all_drivers);
3099
3100 if (ibm->flags.acpi_notify_installed) {
3101 dbg_printk(TPACPI_DBG_EXIT,
3102 "%s: acpi_remove_notify_handler\n", ibm->name);
3103 BUG_ON(!ibm->acpi);
3104 acpi_remove_notify_handler(*ibm->acpi->handle,
3105 ibm->acpi->type,
3106 dispatch_acpi_notify);
3107 ibm->flags.acpi_notify_installed = 0;
3108 ibm->flags.acpi_notify_installed = 0;
3109 }
3110
3111 if (ibm->flags.proc_created) {
3112 dbg_printk(TPACPI_DBG_EXIT,
3113 "%s: remove_proc_entry\n", ibm->name);
3114 remove_proc_entry(ibm->name, proc_dir);
3115 ibm->flags.proc_created = 0;
3116 }
3117
3118 if (ibm->flags.acpi_driver_registered) {
3119 dbg_printk(TPACPI_DBG_EXIT,
3120 "%s: acpi_bus_unregister_driver\n", ibm->name);
3121 BUG_ON(!ibm->acpi);
3122 acpi_bus_unregister_driver(ibm->acpi->driver);
3123 kfree(ibm->acpi->driver);
3124 ibm->acpi->driver = NULL;
3125 ibm->flags.acpi_driver_registered = 0;
3126 }
3127
3128 if (ibm->flags.init_called && ibm->exit) {
3129 ibm->exit();
3130 ibm->flags.init_called = 0;
3131 }
3132
3133 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
3134 }
3135
3136 /* Probing */
3137
3138 static char *ibm_thinkpad_ec_found = NULL;
3139
3140 static char* __init check_dmi_for_ec(void)
3141 {
3142 struct dmi_device *dev = NULL;
3143 char ec_fw_string[18];
3144
3145 /*
3146 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
3147 * X32 or newer, all Z series; Some models must have an
3148 * up-to-date BIOS or they will not be detected.
3149 *
3150 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
3151 */
3152 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
3153 if (sscanf(dev->name,
3154 "IBM ThinkPad Embedded Controller -[%17c",
3155 ec_fw_string) == 1) {
3156 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
3157 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
3158 return kstrdup(ec_fw_string, GFP_KERNEL);
3159 }
3160 }
3161 return NULL;
3162 }
3163
3164 static int __init probe_for_thinkpad(void)
3165 {
3166 int is_thinkpad;
3167
3168 if (acpi_disabled)
3169 return -ENODEV;
3170
3171 /*
3172 * Non-ancient models have better DMI tagging, but very old models
3173 * don't.
3174 */
3175 is_thinkpad = dmi_name_in_vendors("ThinkPad");
3176
3177 /* ec is required because many other handles are relative to it */
3178 IBM_ACPIHANDLE_INIT(ec);
3179 if (!ec_handle) {
3180 if (is_thinkpad)
3181 printk(IBM_ERR
3182 "Not yet supported ThinkPad detected!\n");
3183 return -ENODEV;
3184 }
3185
3186 /*
3187 * Risks a regression on very old machines, but reduces potential
3188 * false positives a damn great deal
3189 */
3190 if (!is_thinkpad)
3191 is_thinkpad = dmi_name_in_vendors("IBM");
3192
3193 if (!is_thinkpad && !force_load)
3194 return -ENODEV;
3195
3196 return 0;
3197 }
3198
3199
3200 /* Module init, exit, parameters */
3201
3202 static struct ibm_init_struct ibms_init[] __initdata = {
3203 {
3204 .init = thinkpad_acpi_driver_init,
3205 .data = &thinkpad_acpi_driver_data,
3206 },
3207 {
3208 .init = hotkey_init,
3209 .data = &hotkey_driver_data,
3210 },
3211 {
3212 .init = bluetooth_init,
3213 .data = &bluetooth_driver_data,
3214 },
3215 {
3216 .init = wan_init,
3217 .data = &wan_driver_data,
3218 },
3219 {
3220 .init = video_init,
3221 .data = &video_driver_data,
3222 },
3223 {
3224 .init = light_init,
3225 .data = &light_driver_data,
3226 },
3227 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3228 {
3229 .init = dock_init,
3230 .data = &dock_driver_data[0],
3231 },
3232 {
3233 .data = &dock_driver_data[1],
3234 },
3235 #endif
3236 #ifdef CONFIG_THINKPAD_ACPI_BAY
3237 {
3238 .init = bay_init,
3239 .data = &bay_driver_data,
3240 },
3241 #endif
3242 {
3243 .init = cmos_init,
3244 .data = &cmos_driver_data,
3245 },
3246 {
3247 .init = led_init,
3248 .data = &led_driver_data,
3249 },
3250 {
3251 .init = beep_init,
3252 .data = &beep_driver_data,
3253 },
3254 {
3255 .init = thermal_init,
3256 .data = &thermal_driver_data,
3257 },
3258 {
3259 .data = &ecdump_driver_data,
3260 },
3261 {
3262 .init = brightness_init,
3263 .data = &brightness_driver_data,
3264 },
3265 {
3266 .data = &volume_driver_data,
3267 },
3268 {
3269 .init = fan_init,
3270 .data = &fan_driver_data,
3271 },
3272 };
3273
3274 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
3275 {
3276 unsigned int i;
3277 struct ibm_struct *ibm;
3278
3279 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3280 ibm = ibms_init[i].data;
3281 BUG_ON(ibm == NULL);
3282
3283 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
3284 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
3285 return -ENOSPC;
3286 strcpy(ibms_init[i].param, val);
3287 strcat(ibms_init[i].param, ",");
3288 return 0;
3289 }
3290 }
3291
3292 return -EINVAL;
3293 }
3294
3295 static int experimental;
3296 module_param(experimental, int, 0);
3297
3298 static u32 dbg_level;
3299 module_param_named(debug, dbg_level, uint, 0);
3300
3301 static int force_load;
3302 module_param(force_load, int, 0);
3303
3304 #define IBM_PARAM(feature) \
3305 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
3306
3307 IBM_PARAM(hotkey);
3308 IBM_PARAM(bluetooth);
3309 IBM_PARAM(video);
3310 IBM_PARAM(light);
3311 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3312 IBM_PARAM(dock);
3313 #endif
3314 #ifdef CONFIG_THINKPAD_ACPI_BAY
3315 IBM_PARAM(bay);
3316 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3317 IBM_PARAM(cmos);
3318 IBM_PARAM(led);
3319 IBM_PARAM(beep);
3320 IBM_PARAM(ecdump);
3321 IBM_PARAM(brightness);
3322 IBM_PARAM(volume);
3323 IBM_PARAM(fan);
3324
3325 static int __init thinkpad_acpi_module_init(void)
3326 {
3327 int ret, i;
3328
3329 /* Driver-level probe */
3330 ret = probe_for_thinkpad();
3331 if (ret)
3332 return ret;
3333
3334 /* Driver initialization */
3335 ibm_thinkpad_ec_found = check_dmi_for_ec();
3336 IBM_ACPIHANDLE_INIT(ecrd);
3337 IBM_ACPIHANDLE_INIT(ecwr);
3338
3339 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
3340 if (!proc_dir) {
3341 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
3342 thinkpad_acpi_module_exit();
3343 return -ENODEV;
3344 }
3345 proc_dir->owner = THIS_MODULE;
3346
3347 ret = platform_driver_register(&tpacpi_pdriver);
3348 if (ret) {
3349 printk(IBM_ERR "unable to register platform driver\n");
3350 thinkpad_acpi_module_exit();
3351 return ret;
3352 }
3353 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
3354 if (ret) {
3355 printk(IBM_ERR "unable to create sysfs driver attributes\n");
3356 thinkpad_acpi_module_exit();
3357 return ret;
3358 }
3359
3360
3361 /* Device initialization */
3362 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
3363 NULL, 0);
3364 if (IS_ERR(tpacpi_pdev)) {
3365 ret = PTR_ERR(tpacpi_pdev);
3366 tpacpi_pdev = NULL;
3367 printk(IBM_ERR "unable to register platform device\n");
3368 thinkpad_acpi_module_exit();
3369 return ret;
3370 }
3371 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
3372 if (IS_ERR(tpacpi_hwmon)) {
3373 ret = PTR_ERR(tpacpi_hwmon);
3374 tpacpi_hwmon = NULL;
3375 printk(IBM_ERR "unable to register hwmon device\n");
3376 thinkpad_acpi_module_exit();
3377 return ret;
3378 }
3379 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3380 ret = ibm_init(&ibms_init[i]);
3381 if (ret >= 0 && *ibms_init[i].param)
3382 ret = ibms_init[i].data->write(ibms_init[i].param);
3383 if (ret < 0) {
3384 thinkpad_acpi_module_exit();
3385 return ret;
3386 }
3387 }
3388
3389 return 0;
3390 }
3391
3392 static void thinkpad_acpi_module_exit(void)
3393 {
3394 struct ibm_struct *ibm, *itmp;
3395
3396 list_for_each_entry_safe_reverse(ibm, itmp,
3397 &tpacpi_all_drivers,
3398 all_drivers) {
3399 ibm_exit(ibm);
3400 }
3401
3402 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
3403
3404 if (tpacpi_hwmon)
3405 hwmon_device_unregister(tpacpi_hwmon);
3406
3407 if (tpacpi_pdev)
3408 platform_device_unregister(tpacpi_pdev);
3409
3410 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
3411 platform_driver_unregister(&tpacpi_pdriver);
3412
3413 if (proc_dir)
3414 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
3415
3416 kfree(ibm_thinkpad_ec_found);
3417 }
3418
3419 module_init(thinkpad_acpi_module_init);
3420 module_exit(thinkpad_acpi_module_exit);
WRT350N Kernel Patches