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ACPI: thinkpad-acpi: protect fan and hotkey data structures
[wandboard.git] / drivers / misc / thinkpad_acpi.c
blobaa69ff0c1c91a7898ee2d8b314ec16b00cf3bc09
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
524 if (parse_strtoul(buf, 0xffff, &t))
525 return -EINVAL;
526
527 dbg_level = t;
528
529 return count;
530 }
531
532 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
533 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
534
535 /* version ------------------------------------------------------------- */
536 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
537 char *buf)
538 {
539 return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
540 }
541
542 static DRIVER_ATTR(version, S_IRUGO,
543 tpacpi_driver_version_show, NULL);
544
545 /* --------------------------------------------------------------------- */
546
547 static struct driver_attribute* tpacpi_driver_attributes[] = {
548 &driver_attr_debug_level, &driver_attr_version,
549 &driver_attr_interface_version,
550 };
551
552 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
553 {
554 int i, res;
555
556 i = 0;
557 res = 0;
558 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
559 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
560 i++;
561 }
562
563 return res;
564 }
565
566 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
567 {
568 int i;
569
570 for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
571 driver_remove_file(drv, tpacpi_driver_attributes[i]);
572 }
573
574 /*************************************************************************
575 * sysfs support helpers
576 */
577
578 struct attribute_set_obj {
579 struct attribute_set s;
580 struct attribute *a;
581 } __attribute__((packed));
582
583 static struct attribute_set *create_attr_set(unsigned int max_members,
584 const char* name)
585 {
586 struct attribute_set_obj *sobj;
587
588 if (max_members == 0)
589 return NULL;
590
591 /* Allocates space for implicit NULL at the end too */
592 sobj = kzalloc(sizeof(struct attribute_set_obj) +
593 max_members * sizeof(struct attribute *),
594 GFP_KERNEL);
595 if (!sobj)
596 return NULL;
597 sobj->s.max_members = max_members;
598 sobj->s.group.attrs = &sobj->a;
599 sobj->s.group.name = name;
600
601 return &sobj->s;
602 }
603
604 /* not multi-threaded safe, use it in a single thread per set */
605 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
606 {
607 if (!s || !attr)
608 return -EINVAL;
609
610 if (s->members >= s->max_members)
611 return -ENOMEM;
612
613 s->group.attrs[s->members] = attr;
614 s->members++;
615
616 return 0;
617 }
618
619 static int add_many_to_attr_set(struct attribute_set* s,
620 struct attribute **attr,
621 unsigned int count)
622 {
623 int i, res;
624
625 for (i = 0; i < count; i++) {
626 res = add_to_attr_set(s, attr[i]);
627 if (res)
628 return res;
629 }
630
631 return 0;
632 }
633
634 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
635 {
636 sysfs_remove_group(kobj, &s->group);
637 destroy_attr_set(s);
638 }
639
640 static int parse_strtoul(const char *buf,
641 unsigned long max, unsigned long *value)
642 {
643 char *endp;
644
645 *value = simple_strtoul(buf, &endp, 0);
646 while (*endp && isspace(*endp))
647 endp++;
648 if (*endp || *value > max)
649 return -EINVAL;
650
651 return 0;
652 }
653
654 /****************************************************************************
655 ****************************************************************************
656 *
657 * Subdrivers
658 *
659 ****************************************************************************
660 ****************************************************************************/
661
662 /*************************************************************************
663 * thinkpad-acpi init subdriver
664 */
665
666 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
667 {
668 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
669 printk(IBM_INFO "%s\n", IBM_URL);
670
671 if (ibm_thinkpad_ec_found)
672 printk(IBM_INFO "ThinkPad EC firmware %s\n",
673 ibm_thinkpad_ec_found);
674
675 return 0;
676 }
677
678 static int thinkpad_acpi_driver_read(char *p)
679 {
680 int len = 0;
681
682 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
683 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
684
685 return len;
686 }
687
688 static struct ibm_struct thinkpad_acpi_driver_data = {
689 .name = "driver",
690 .read = thinkpad_acpi_driver_read,
691 };
692
693 /*************************************************************************
694 * Hotkey subdriver
695 */
696
697 static int hotkey_orig_status;
698 static int hotkey_orig_mask;
699
700 static int __init hotkey_init(struct ibm_init_struct *iibm)
701 {
702 int res;
703
704 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
705
706 IBM_ACPIHANDLE_INIT(hkey);
707 mutex_init(&hotkey_mutex);
708
709 /* hotkey not supported on 570 */
710 tp_features.hotkey = hkey_handle != NULL;
711
712 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
713 str_supported(tp_features.hotkey));
714
715 if (tp_features.hotkey) {
716 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
717 A30, R30, R31, T20-22, X20-21, X22-24 */
718 tp_features.hotkey_mask =
719 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
720
721 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
722 str_supported(tp_features.hotkey_mask));
723
724 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
725 if (res)
726 return res;
727 }
728
729 return (tp_features.hotkey)? 0 : 1;
730 }
731
732 static void hotkey_exit(void)
733 {
734 int res;
735
736 if (tp_features.hotkey) {
737 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
738 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
739 if (res)
740 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
741 }
742 }
743
744 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
745 {
746 int hkey;
747
748 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
749 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
750 else {
751 printk(IBM_ERR "unknown hotkey event %d\n", event);
752 acpi_bus_generate_event(ibm->acpi->device, event, 0);
753 }
754 }
755
756 /*
757 * Call with hotkey_mutex held
758 */
759 static int hotkey_get(int *status, int *mask)
760 {
761 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
762 return -EIO;
763
764 if (tp_features.hotkey_mask)
765 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
766 return -EIO;
767
768 return 0;
769 }
770
771 /*
772 * Call with hotkey_mutex held
773 */
774 static int hotkey_set(int status, int mask)
775 {
776 int i;
777
778 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
779 return -EIO;
780
781 if (tp_features.hotkey_mask)
782 for (i = 0; i < 32; i++) {
783 int bit = ((1 << i) & mask) != 0;
784 if (!acpi_evalf(hkey_handle,
785 NULL, "MHKM", "vdd", i + 1, bit))
786 return -EIO;
787 }
788
789 return 0;
790 }
791
792 static int hotkey_read(char *p)
793 {
794 int res, status, mask;
795 int len = 0;
796
797 if (!tp_features.hotkey) {
798 len += sprintf(p + len, "status:\t\tnot supported\n");
799 return len;
800 }
801
802 res = mutex_lock_interruptible(&hotkey_mutex);
803 if (res < 0)
804 return res;
805 res = hotkey_get(&status, &mask);
806 mutex_unlock(&hotkey_mutex);
807 if (res)
808 return res;
809
810 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
811 if (tp_features.hotkey_mask) {
812 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
813 len += sprintf(p + len,
814 "commands:\tenable, disable, reset, <mask>\n");
815 } else {
816 len += sprintf(p + len, "mask:\t\tnot supported\n");
817 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
818 }
819
820 return len;
821 }
822
823 static int hotkey_write(char *buf)
824 {
825 int res, status, mask;
826 char *cmd;
827 int do_cmd = 0;
828
829 if (!tp_features.hotkey)
830 return -ENODEV;
831
832 res = mutex_lock_interruptible(&hotkey_mutex);
833 if (res < 0)
834 return res;
835
836 res = hotkey_get(&status, &mask);
837 if (res)
838 goto errexit;
839
840 res = 0;
841 while ((cmd = next_cmd(&buf))) {
842 if (strlencmp(cmd, "enable") == 0) {
843 status = 1;
844 } else if (strlencmp(cmd, "disable") == 0) {
845 status = 0;
846 } else if (strlencmp(cmd, "reset") == 0) {
847 status = hotkey_orig_status;
848 mask = hotkey_orig_mask;
849 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
850 /* mask set */
851 } else if (sscanf(cmd, "%x", &mask) == 1) {
852 /* mask set */
853 } else {
854 res = -EINVAL;
855 goto errexit;
856 }
857 do_cmd = 1;
858 }
859
860 if (do_cmd)
861 res = hotkey_set(status, mask);
862
863 errexit:
864 mutex_unlock(&hotkey_mutex);
865 return res;
866 }
867
868 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
869 .hid = IBM_HKEY_HID,
870 .notify = hotkey_notify,
871 .handle = &hkey_handle,
872 .type = ACPI_DEVICE_NOTIFY,
873 };
874
875 static struct ibm_struct hotkey_driver_data = {
876 .name = "hotkey",
877 .read = hotkey_read,
878 .write = hotkey_write,
879 .exit = hotkey_exit,
880 .acpi = &ibm_hotkey_acpidriver,
881 };
882
883 /*************************************************************************
884 * Bluetooth subdriver
885 */
886
887 static int __init bluetooth_init(struct ibm_init_struct *iibm)
888 {
889 int status = 0;
890
891 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
892
893 IBM_ACPIHANDLE_INIT(hkey);
894
895 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
896 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
897 tp_features.bluetooth = hkey_handle &&
898 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
899
900 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
901 str_supported(tp_features.bluetooth),
902 status);
903
904 if (tp_features.bluetooth &&
905 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
906 /* no bluetooth hardware present in system */
907 tp_features.bluetooth = 0;
908 dbg_printk(TPACPI_DBG_INIT,
909 "bluetooth hardware not installed\n");
910 }
911
912 return (tp_features.bluetooth)? 0 : 1;
913 }
914
915 static int bluetooth_get_radiosw(void)
916 {
917 int status;
918
919 if (!tp_features.bluetooth)
920 return -ENODEV;
921
922 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
923 return -EIO;
924
925 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
926 }
927
928 static int bluetooth_set_radiosw(int radio_on)
929 {
930 int status;
931
932 if (!tp_features.bluetooth)
933 return -ENODEV;
934
935 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
936 return -EIO;
937 if (radio_on)
938 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
939 else
940 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
941 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
942 return -EIO;
943
944 return 0;
945 }
946
947 static int bluetooth_read(char *p)
948 {
949 int len = 0;
950 int status = bluetooth_get_radiosw();
951
952 if (!tp_features.bluetooth)
953 len += sprintf(p + len, "status:\t\tnot supported\n");
954 else {
955 len += sprintf(p + len, "status:\t\t%s\n",
956 (status)? "enabled" : "disabled");
957 len += sprintf(p + len, "commands:\tenable, disable\n");
958 }
959
960 return len;
961 }
962
963 static int bluetooth_write(char *buf)
964 {
965 char *cmd;
966
967 if (!tp_features.bluetooth)
968 return -ENODEV;
969
970 while ((cmd = next_cmd(&buf))) {
971 if (strlencmp(cmd, "enable") == 0) {
972 bluetooth_set_radiosw(1);
973 } else if (strlencmp(cmd, "disable") == 0) {
974 bluetooth_set_radiosw(0);
975 } else
976 return -EINVAL;
977 }
978
979 return 0;
980 }
981
982 static struct ibm_struct bluetooth_driver_data = {
983 .name = "bluetooth",
984 .read = bluetooth_read,
985 .write = bluetooth_write,
986 };
987
988 /*************************************************************************
989 * Wan subdriver
990 */
991
992 static int __init wan_init(struct ibm_init_struct *iibm)
993 {
994 int status = 0;
995
996 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
997
998 IBM_ACPIHANDLE_INIT(hkey);
999
1000 tp_features.wan = hkey_handle &&
1001 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1002
1003 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1004 str_supported(tp_features.wan),
1005 status);
1006
1007 if (tp_features.wan &&
1008 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
1009 /* no wan hardware present in system */
1010 tp_features.wan = 0;
1011 dbg_printk(TPACPI_DBG_INIT,
1012 "wan hardware not installed\n");
1013 }
1014
1015 return (tp_features.wan)? 0 : 1;
1016 }
1017
1018 static int wan_get_radiosw(void)
1019 {
1020 int status;
1021
1022 if (!tp_features.wan)
1023 return -ENODEV;
1024
1025 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1026 return -EIO;
1027
1028 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1029 }
1030
1031 static int wan_set_radiosw(int radio_on)
1032 {
1033 int status;
1034
1035 if (!tp_features.wan)
1036 return -ENODEV;
1037
1038 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1039 return -EIO;
1040 if (radio_on)
1041 status |= TP_ACPI_WANCARD_RADIOSSW;
1042 else
1043 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1044 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1045 return -EIO;
1046
1047 return 0;
1048 }
1049
1050 static int wan_read(char *p)
1051 {
1052 int len = 0;
1053 int status = wan_get_radiosw();
1054
1055 if (!tp_features.wan)
1056 len += sprintf(p + len, "status:\t\tnot supported\n");
1057 else {
1058 len += sprintf(p + len, "status:\t\t%s\n",
1059 (status)? "enabled" : "disabled");
1060 len += sprintf(p + len, "commands:\tenable, disable\n");
1061 }
1062
1063 return len;
1064 }
1065
1066 static int wan_write(char *buf)
1067 {
1068 char *cmd;
1069
1070 if (!tp_features.wan)
1071 return -ENODEV;
1072
1073 while ((cmd = next_cmd(&buf))) {
1074 if (strlencmp(cmd, "enable") == 0) {
1075 wan_set_radiosw(1);
1076 } else if (strlencmp(cmd, "disable") == 0) {
1077 wan_set_radiosw(0);
1078 } else
1079 return -EINVAL;
1080 }
1081
1082 return 0;
1083 }
1084
1085 static struct ibm_struct wan_driver_data = {
1086 .name = "wan",
1087 .read = wan_read,
1088 .write = wan_write,
1089 .flags.experimental = 1,
1090 };
1091
1092 /*************************************************************************
1093 * Video subdriver
1094 */
1095
1096 static enum video_access_mode video_supported;
1097 static int video_orig_autosw;
1098
1099 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1100 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1101 "\\_SB.PCI0.VID0", /* 770e */
1102 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1103 "\\_SB.PCI0.AGP.VID", /* all others */
1104 ); /* R30, R31 */
1105
1106 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1107
1108 static int __init video_init(struct ibm_init_struct *iibm)
1109 {
1110 int ivga;
1111
1112 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1113
1114 IBM_ACPIHANDLE_INIT(vid);
1115 IBM_ACPIHANDLE_INIT(vid2);
1116
1117 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1118 /* G41, assume IVGA doesn't change */
1119 vid_handle = vid2_handle;
1120
1121 if (!vid_handle)
1122 /* video switching not supported on R30, R31 */
1123 video_supported = TPACPI_VIDEO_NONE;
1124 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1125 /* 570 */
1126 video_supported = TPACPI_VIDEO_570;
1127 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1128 /* 600e/x, 770e, 770x */
1129 video_supported = TPACPI_VIDEO_770;
1130 else
1131 /* all others */
1132 video_supported = TPACPI_VIDEO_NEW;
1133
1134 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1135 str_supported(video_supported != TPACPI_VIDEO_NONE),
1136 video_supported);
1137
1138 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1139 }
1140
1141 static void video_exit(void)
1142 {
1143 dbg_printk(TPACPI_DBG_EXIT,
1144 "restoring original video autoswitch mode\n");
1145 if (video_autosw_set(video_orig_autosw))
1146 printk(IBM_ERR "error while trying to restore original "
1147 "video autoswitch mode\n");
1148 }
1149
1150 static int video_outputsw_get(void)
1151 {
1152 int status = 0;
1153 int i;
1154
1155 switch (video_supported) {
1156 case TPACPI_VIDEO_570:
1157 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1158 TP_ACPI_VIDEO_570_PHSCMD))
1159 return -EIO;
1160 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1161 break;
1162 case TPACPI_VIDEO_770:
1163 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1164 return -EIO;
1165 if (i)
1166 status |= TP_ACPI_VIDEO_S_LCD;
1167 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1168 return -EIO;
1169 if (i)
1170 status |= TP_ACPI_VIDEO_S_CRT;
1171 break;
1172 case TPACPI_VIDEO_NEW:
1173 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1174 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1175 return -EIO;
1176 if (i)
1177 status |= TP_ACPI_VIDEO_S_CRT;
1178
1179 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1180 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1181 return -EIO;
1182 if (i)
1183 status |= TP_ACPI_VIDEO_S_LCD;
1184 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1185 return -EIO;
1186 if (i)
1187 status |= TP_ACPI_VIDEO_S_DVI;
1188 break;
1189 default:
1190 return -ENOSYS;
1191 }
1192
1193 return status;
1194 }
1195
1196 static int video_outputsw_set(int status)
1197 {
1198 int autosw;
1199 int res = 0;
1200
1201 switch (video_supported) {
1202 case TPACPI_VIDEO_570:
1203 res = acpi_evalf(NULL, NULL,
1204 "\\_SB.PHS2", "vdd",
1205 TP_ACPI_VIDEO_570_PHS2CMD,
1206 status | TP_ACPI_VIDEO_570_PHS2SET);
1207 break;
1208 case TPACPI_VIDEO_770:
1209 autosw = video_autosw_get();
1210 if (autosw < 0)
1211 return autosw;
1212
1213 res = video_autosw_set(1);
1214 if (res)
1215 return res;
1216 res = acpi_evalf(vid_handle, NULL,
1217 "ASWT", "vdd", status * 0x100, 0);
1218 if (!autosw && video_autosw_set(autosw)) {
1219 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1220 return -EIO;
1221 }
1222 break;
1223 case TPACPI_VIDEO_NEW:
1224 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1225 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1226 break;
1227 default:
1228 return -ENOSYS;
1229 }
1230
1231 return (res)? 0 : -EIO;
1232 }
1233
1234 static int video_autosw_get(void)
1235 {
1236 int autosw = 0;
1237
1238 switch (video_supported) {
1239 case TPACPI_VIDEO_570:
1240 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1241 return -EIO;
1242 break;
1243 case TPACPI_VIDEO_770:
1244 case TPACPI_VIDEO_NEW:
1245 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1246 return -EIO;
1247 break;
1248 default:
1249 return -ENOSYS;
1250 }
1251
1252 return autosw & 1;
1253 }
1254
1255 static int video_autosw_set(int enable)
1256 {
1257 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1258 return -EIO;
1259 return 0;
1260 }
1261
1262 static int video_outputsw_cycle(void)
1263 {
1264 int autosw = video_autosw_get();
1265 int res;
1266
1267 if (autosw < 0)
1268 return autosw;
1269
1270 switch (video_supported) {
1271 case TPACPI_VIDEO_570:
1272 res = video_autosw_set(1);
1273 if (res)
1274 return res;
1275 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1276 break;
1277 case TPACPI_VIDEO_770:
1278 case TPACPI_VIDEO_NEW:
1279 res = video_autosw_set(1);
1280 if (res)
1281 return res;
1282 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1283 break;
1284 default:
1285 return -ENOSYS;
1286 }
1287 if (!autosw && video_autosw_set(autosw)) {
1288 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1289 return -EIO;
1290 }
1291
1292 return (res)? 0 : -EIO;
1293 }
1294
1295 static int video_expand_toggle(void)
1296 {
1297 switch (video_supported) {
1298 case TPACPI_VIDEO_570:
1299 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1300 0 : -EIO;
1301 case TPACPI_VIDEO_770:
1302 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1303 0 : -EIO;
1304 case TPACPI_VIDEO_NEW:
1305 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1306 0 : -EIO;
1307 default:
1308 return -ENOSYS;
1309 }
1310 /* not reached */
1311 }
1312
1313 static int video_read(char *p)
1314 {
1315 int status, autosw;
1316 int len = 0;
1317
1318 if (video_supported == TPACPI_VIDEO_NONE) {
1319 len += sprintf(p + len, "status:\t\tnot supported\n");
1320 return len;
1321 }
1322
1323 status = video_outputsw_get();
1324 if (status < 0)
1325 return status;
1326
1327 autosw = video_autosw_get();
1328 if (autosw < 0)
1329 return autosw;
1330
1331 len += sprintf(p + len, "status:\t\tsupported\n");
1332 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1333 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1334 if (video_supported == TPACPI_VIDEO_NEW)
1335 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1336 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1337 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1338 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1339 if (video_supported == TPACPI_VIDEO_NEW)
1340 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1341 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1342 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1343
1344 return len;
1345 }
1346
1347 static int video_write(char *buf)
1348 {
1349 char *cmd;
1350 int enable, disable, status;
1351 int res;
1352
1353 if (video_supported == TPACPI_VIDEO_NONE)
1354 return -ENODEV;
1355
1356 enable = 0;
1357 disable = 0;
1358
1359 while ((cmd = next_cmd(&buf))) {
1360 if (strlencmp(cmd, "lcd_enable") == 0) {
1361 enable |= TP_ACPI_VIDEO_S_LCD;
1362 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1363 disable |= TP_ACPI_VIDEO_S_LCD;
1364 } else if (strlencmp(cmd, "crt_enable") == 0) {
1365 enable |= TP_ACPI_VIDEO_S_CRT;
1366 } else if (strlencmp(cmd, "crt_disable") == 0) {
1367 disable |= TP_ACPI_VIDEO_S_CRT;
1368 } else if (video_supported == TPACPI_VIDEO_NEW &&
1369 strlencmp(cmd, "dvi_enable") == 0) {
1370 enable |= TP_ACPI_VIDEO_S_DVI;
1371 } else if (video_supported == TPACPI_VIDEO_NEW &&
1372 strlencmp(cmd, "dvi_disable") == 0) {
1373 disable |= TP_ACPI_VIDEO_S_DVI;
1374 } else if (strlencmp(cmd, "auto_enable") == 0) {
1375 res = video_autosw_set(1);
1376 if (res)
1377 return res;
1378 } else if (strlencmp(cmd, "auto_disable") == 0) {
1379 res = video_autosw_set(0);
1380 if (res)
1381 return res;
1382 } else if (strlencmp(cmd, "video_switch") == 0) {
1383 res = video_outputsw_cycle();
1384 if (res)
1385 return res;
1386 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1387 res = video_expand_toggle();
1388 if (res)
1389 return res;
1390 } else
1391 return -EINVAL;
1392 }
1393
1394 if (enable || disable) {
1395 status = video_outputsw_get();
1396 if (status < 0)
1397 return status;
1398 res = video_outputsw_set((status & ~disable) | enable);
1399 if (res)
1400 return res;
1401 }
1402
1403 return 0;
1404 }
1405
1406 static struct ibm_struct video_driver_data = {
1407 .name = "video",
1408 .read = video_read,
1409 .write = video_write,
1410 .exit = video_exit,
1411 };
1412
1413 /*************************************************************************
1414 * Light (thinklight) subdriver
1415 */
1416
1417 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1418 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1419
1420 static int __init light_init(struct ibm_init_struct *iibm)
1421 {
1422 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1423
1424 IBM_ACPIHANDLE_INIT(ledb);
1425 IBM_ACPIHANDLE_INIT(lght);
1426 IBM_ACPIHANDLE_INIT(cmos);
1427
1428 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1429 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1430
1431 if (tp_features.light)
1432 /* light status not supported on
1433 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1434 tp_features.light_status =
1435 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1436
1437 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1438 str_supported(tp_features.light));
1439
1440 return (tp_features.light)? 0 : 1;
1441 }
1442
1443 static int light_read(char *p)
1444 {
1445 int len = 0;
1446 int status = 0;
1447
1448 if (!tp_features.light) {
1449 len += sprintf(p + len, "status:\t\tnot supported\n");
1450 } else if (!tp_features.light_status) {
1451 len += sprintf(p + len, "status:\t\tunknown\n");
1452 len += sprintf(p + len, "commands:\ton, off\n");
1453 } else {
1454 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1455 return -EIO;
1456 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1457 len += sprintf(p + len, "commands:\ton, off\n");
1458 }
1459
1460 return len;
1461 }
1462
1463 static int light_write(char *buf)
1464 {
1465 int cmos_cmd, lght_cmd;
1466 char *cmd;
1467 int success;
1468
1469 if (!tp_features.light)
1470 return -ENODEV;
1471
1472 while ((cmd = next_cmd(&buf))) {
1473 if (strlencmp(cmd, "on") == 0) {
1474 cmos_cmd = 0x0c;
1475 lght_cmd = 1;
1476 } else if (strlencmp(cmd, "off") == 0) {
1477 cmos_cmd = 0x0d;
1478 lght_cmd = 0;
1479 } else
1480 return -EINVAL;
1481
1482 success = cmos_handle ?
1483 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1484 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1485 if (!success)
1486 return -EIO;
1487 }
1488
1489 return 0;
1490 }
1491
1492 static struct ibm_struct light_driver_data = {
1493 .name = "light",
1494 .read = light_read,
1495 .write = light_write,
1496 };
1497
1498 /*************************************************************************
1499 * Dock subdriver
1500 */
1501
1502 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1503
1504 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1505 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1506 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1507 "\\_SB.PCI.ISA.SLCE", /* 570 */
1508 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1509
1510 /* don't list other alternatives as we install a notify handler on the 570 */
1511 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1512
1513 #define dock_docked() (_sta(dock_handle) & 1)
1514
1515 static int __init dock_init(struct ibm_init_struct *iibm)
1516 {
1517 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1518
1519 IBM_ACPIHANDLE_INIT(dock);
1520 IBM_ACPIHANDLE_INIT(pci);
1521
1522 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1523 str_supported(dock_handle != NULL));
1524
1525 return (dock_handle)? 0 : 1;
1526 }
1527
1528 static void dock_notify(struct ibm_struct *ibm, u32 event)
1529 {
1530 int docked = dock_docked();
1531 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1532
1533 if (event == 1 && !pci) /* 570 */
1534 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1535 else if (event == 1 && pci) /* 570 */
1536 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1537 else if (event == 3 && docked)
1538 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1539 else if (event == 3 && !docked)
1540 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
1541 else if (event == 0 && docked)
1542 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1543 else {
1544 printk(IBM_ERR "unknown dock event %d, status %d\n",
1545 event, _sta(dock_handle));
1546 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
1547 }
1548 }
1549
1550 static int dock_read(char *p)
1551 {
1552 int len = 0;
1553 int docked = dock_docked();
1554
1555 if (!dock_handle)
1556 len += sprintf(p + len, "status:\t\tnot supported\n");
1557 else if (!docked)
1558 len += sprintf(p + len, "status:\t\tundocked\n");
1559 else {
1560 len += sprintf(p + len, "status:\t\tdocked\n");
1561 len += sprintf(p + len, "commands:\tdock, undock\n");
1562 }
1563
1564 return len;
1565 }
1566
1567 static int dock_write(char *buf)
1568 {
1569 char *cmd;
1570
1571 if (!dock_docked())
1572 return -ENODEV;
1573
1574 while ((cmd = next_cmd(&buf))) {
1575 if (strlencmp(cmd, "undock") == 0) {
1576 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1577 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1578 return -EIO;
1579 } else if (strlencmp(cmd, "dock") == 0) {
1580 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1581 return -EIO;
1582 } else
1583 return -EINVAL;
1584 }
1585
1586 return 0;
1587 }
1588
1589 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1590 {
1591 .notify = dock_notify,
1592 .handle = &dock_handle,
1593 .type = ACPI_SYSTEM_NOTIFY,
1594 },
1595 {
1596 .hid = IBM_PCI_HID,
1597 .notify = dock_notify,
1598 .handle = &pci_handle,
1599 .type = ACPI_SYSTEM_NOTIFY,
1600 },
1601 };
1602
1603 static struct ibm_struct dock_driver_data[2] = {
1604 {
1605 .name = "dock",
1606 .read = dock_read,
1607 .write = dock_write,
1608 .acpi = &ibm_dock_acpidriver[0],
1609 },
1610 {
1611 .name = "dock",
1612 .acpi = &ibm_dock_acpidriver[1],
1613 },
1614 };
1615
1616 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1617
1618 /*************************************************************************
1619 * Bay subdriver
1620 */
1621
1622 #ifdef CONFIG_THINKPAD_ACPI_BAY
1623 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1624 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1625 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1626 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1627 ); /* A21e, R30, R31 */
1628 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1629 "_EJ0", /* all others */
1630 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1631 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1632 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1633 ); /* all others */
1634 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1635 "_EJ0", /* 770x */
1636 ); /* all others */
1637
1638 static int __init bay_init(struct ibm_init_struct *iibm)
1639 {
1640 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1641
1642 IBM_ACPIHANDLE_INIT(bay);
1643 if (bay_handle)
1644 IBM_ACPIHANDLE_INIT(bay_ej);
1645 IBM_ACPIHANDLE_INIT(bay2);
1646 if (bay2_handle)
1647 IBM_ACPIHANDLE_INIT(bay2_ej);
1648
1649 tp_features.bay_status = bay_handle &&
1650 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1651 tp_features.bay_status2 = bay2_handle &&
1652 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1653
1654 tp_features.bay_eject = bay_handle && bay_ej_handle &&
1655 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1656 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1657 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1658
1659 vdbg_printk(TPACPI_DBG_INIT,
1660 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1661 str_supported(tp_features.bay_status),
1662 str_supported(tp_features.bay_eject),
1663 str_supported(tp_features.bay_status2),
1664 str_supported(tp_features.bay_eject2));
1665
1666 return (tp_features.bay_status || tp_features.bay_eject ||
1667 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1668 }
1669
1670 static void bay_notify(struct ibm_struct *ibm, u32 event)
1671 {
1672 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1673 }
1674
1675 #define bay_occupied(b) (_sta(b##_handle) & 1)
1676
1677 static int bay_read(char *p)
1678 {
1679 int len = 0;
1680 int occupied = bay_occupied(bay);
1681 int occupied2 = bay_occupied(bay2);
1682 int eject, eject2;
1683
1684 len += sprintf(p + len, "status:\t\t%s\n",
1685 tp_features.bay_status ?
1686 (occupied ? "occupied" : "unoccupied") :
1687 "not supported");
1688 if (tp_features.bay_status2)
1689 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1690 "occupied" : "unoccupied");
1691
1692 eject = tp_features.bay_eject && occupied;
1693 eject2 = tp_features.bay_eject2 && occupied2;
1694
1695 if (eject && eject2)
1696 len += sprintf(p + len, "commands:\teject, eject2\n");
1697 else if (eject)
1698 len += sprintf(p + len, "commands:\teject\n");
1699 else if (eject2)
1700 len += sprintf(p + len, "commands:\teject2\n");
1701
1702 return len;
1703 }
1704
1705 static int bay_write(char *buf)
1706 {
1707 char *cmd;
1708
1709 if (!tp_features.bay_eject && !tp_features.bay_eject2)
1710 return -ENODEV;
1711
1712 while ((cmd = next_cmd(&buf))) {
1713 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1714 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1715 return -EIO;
1716 } else if (tp_features.bay_eject2 &&
1717 strlencmp(cmd, "eject2") == 0) {
1718 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1719 return -EIO;
1720 } else
1721 return -EINVAL;
1722 }
1723
1724 return 0;
1725 }
1726
1727 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
1728 .notify = bay_notify,
1729 .handle = &bay_handle,
1730 .type = ACPI_SYSTEM_NOTIFY,
1731 };
1732
1733 static struct ibm_struct bay_driver_data = {
1734 .name = "bay",
1735 .read = bay_read,
1736 .write = bay_write,
1737 .acpi = &ibm_bay_acpidriver,
1738 };
1739
1740 #endif /* CONFIG_THINKPAD_ACPI_BAY */
1741
1742 /*************************************************************************
1743 * CMOS subdriver
1744 */
1745
1746 static int __init cmos_init(struct ibm_init_struct *iibm)
1747 {
1748 vdbg_printk(TPACPI_DBG_INIT,
1749 "initializing cmos commands subdriver\n");
1750
1751 IBM_ACPIHANDLE_INIT(cmos);
1752
1753 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1754 str_supported(cmos_handle != NULL));
1755 return (cmos_handle)? 0 : 1;
1756 }
1757
1758 static int cmos_read(char *p)
1759 {
1760 int len = 0;
1761
1762 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1763 R30, R31, T20-22, X20-21 */
1764 if (!cmos_handle)
1765 len += sprintf(p + len, "status:\t\tnot supported\n");
1766 else {
1767 len += sprintf(p + len, "status:\t\tsupported\n");
1768 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1769 }
1770
1771 return len;
1772 }
1773
1774 static int cmos_write(char *buf)
1775 {
1776 char *cmd;
1777 int cmos_cmd, res;
1778
1779 while ((cmd = next_cmd(&buf))) {
1780 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1781 cmos_cmd >= 0 && cmos_cmd <= 21) {
1782 /* cmos_cmd set */
1783 } else
1784 return -EINVAL;
1785
1786 res = issue_thinkpad_cmos_command(cmos_cmd);
1787 if (res)
1788 return res;
1789 }
1790
1791 return 0;
1792 }
1793
1794 static struct ibm_struct cmos_driver_data = {
1795 .name = "cmos",
1796 .read = cmos_read,
1797 .write = cmos_write,
1798 };
1799
1800 /*************************************************************************
1801 * LED subdriver
1802 */
1803
1804 static enum led_access_mode led_supported;
1805
1806 IBM_HANDLE(led, ec, "SLED", /* 570 */
1807 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1808 "LED", /* all others */
1809 ); /* R30, R31 */
1810
1811 static int __init led_init(struct ibm_init_struct *iibm)
1812 {
1813 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
1814
1815 IBM_ACPIHANDLE_INIT(led);
1816
1817 if (!led_handle)
1818 /* led not supported on R30, R31 */
1819 led_supported = TPACPI_LED_NONE;
1820 else if (strlencmp(led_path, "SLED") == 0)
1821 /* 570 */
1822 led_supported = TPACPI_LED_570;
1823 else if (strlencmp(led_path, "SYSL") == 0)
1824 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1825 led_supported = TPACPI_LED_OLD;
1826 else
1827 /* all others */
1828 led_supported = TPACPI_LED_NEW;
1829
1830 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
1831 str_supported(led_supported), led_supported);
1832
1833 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
1834 }
1835
1836 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1837
1838 static int led_read(char *p)
1839 {
1840 int len = 0;
1841
1842 if (!led_supported) {
1843 len += sprintf(p + len, "status:\t\tnot supported\n");
1844 return len;
1845 }
1846 len += sprintf(p + len, "status:\t\tsupported\n");
1847
1848 if (led_supported == TPACPI_LED_570) {
1849 /* 570 */
1850 int i, status;
1851 for (i = 0; i < 8; i++) {
1852 if (!acpi_evalf(ec_handle,
1853 &status, "GLED", "dd", 1 << i))
1854 return -EIO;
1855 len += sprintf(p + len, "%d:\t\t%s\n",
1856 i, led_status(status));
1857 }
1858 }
1859
1860 len += sprintf(p + len, "commands:\t"
1861 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1862
1863 return len;
1864 }
1865
1866 /* off, on, blink */
1867 static const int led_sled_arg1[] = { 0, 1, 3 };
1868 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1869 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1870 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1871
1872 static int led_write(char *buf)
1873 {
1874 char *cmd;
1875 int led, ind, ret;
1876
1877 if (!led_supported)
1878 return -ENODEV;
1879
1880 while ((cmd = next_cmd(&buf))) {
1881 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1882 return -EINVAL;
1883
1884 if (strstr(cmd, "off")) {
1885 ind = 0;
1886 } else if (strstr(cmd, "on")) {
1887 ind = 1;
1888 } else if (strstr(cmd, "blink")) {
1889 ind = 2;
1890 } else
1891 return -EINVAL;
1892
1893 if (led_supported == TPACPI_LED_570) {
1894 /* 570 */
1895 led = 1 << led;
1896 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1897 led, led_sled_arg1[ind]))
1898 return -EIO;
1899 } else if (led_supported == TPACPI_LED_OLD) {
1900 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1901 led = 1 << led;
1902 ret = ec_write(TPACPI_LED_EC_HLMS, led);
1903 if (ret >= 0)
1904 ret =
1905 ec_write(TPACPI_LED_EC_HLBL,
1906 led * led_exp_hlbl[ind]);
1907 if (ret >= 0)
1908 ret =
1909 ec_write(TPACPI_LED_EC_HLCL,
1910 led * led_exp_hlcl[ind]);
1911 if (ret < 0)
1912 return ret;
1913 } else {
1914 /* all others */
1915 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1916 led, led_led_arg1[ind]))
1917 return -EIO;
1918 }
1919 }
1920
1921 return 0;
1922 }
1923
1924 static struct ibm_struct led_driver_data = {
1925 .name = "led",
1926 .read = led_read,
1927 .write = led_write,
1928 };
1929
1930 /*************************************************************************
1931 * Beep subdriver
1932 */
1933
1934 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
1935
1936 static int __init beep_init(struct ibm_init_struct *iibm)
1937 {
1938 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
1939
1940 IBM_ACPIHANDLE_INIT(beep);
1941
1942 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
1943 str_supported(beep_handle != NULL));
1944
1945 return (beep_handle)? 0 : 1;
1946 }
1947
1948 static int beep_read(char *p)
1949 {
1950 int len = 0;
1951
1952 if (!beep_handle)
1953 len += sprintf(p + len, "status:\t\tnot supported\n");
1954 else {
1955 len += sprintf(p + len, "status:\t\tsupported\n");
1956 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1957 }
1958
1959 return len;
1960 }
1961
1962 static int beep_write(char *buf)
1963 {
1964 char *cmd;
1965 int beep_cmd;
1966
1967 if (!beep_handle)
1968 return -ENODEV;
1969
1970 while ((cmd = next_cmd(&buf))) {
1971 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1972 beep_cmd >= 0 && beep_cmd <= 17) {
1973 /* beep_cmd set */
1974 } else
1975 return -EINVAL;
1976 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1977 return -EIO;
1978 }
1979
1980 return 0;
1981 }
1982
1983 static struct ibm_struct beep_driver_data = {
1984 .name = "beep",
1985 .read = beep_read,
1986 .write = beep_write,
1987 };
1988
1989 /*************************************************************************
1990 * Thermal subdriver
1991 */
1992
1993 static enum thermal_access_mode thermal_read_mode;
1994
1995 static int __init thermal_init(struct ibm_init_struct *iibm)
1996 {
1997 u8 t, ta1, ta2;
1998 int i;
1999 int acpi_tmp7;
2000
2001 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2002
2003 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2004
2005 if (ibm_thinkpad_ec_found && experimental) {
2006 /*
2007 * Direct EC access mode: sensors at registers
2008 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2009 * non-implemented, thermal sensors return 0x80 when
2010 * not available
2011 */
2012
2013 ta1 = ta2 = 0;
2014 for (i = 0; i < 8; i++) {
2015 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2016 ta1 |= t;
2017 } else {
2018 ta1 = 0;
2019 break;
2020 }
2021 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2022 ta2 |= t;
2023 } else {
2024 ta1 = 0;
2025 break;
2026 }
2027 }
2028 if (ta1 == 0) {
2029 /* This is sheer paranoia, but we handle it anyway */
2030 if (acpi_tmp7) {
2031 printk(IBM_ERR
2032 "ThinkPad ACPI EC access misbehaving, "
2033 "falling back to ACPI TMPx access mode\n");
2034 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2035 } else {
2036 printk(IBM_ERR
2037 "ThinkPad ACPI EC access misbehaving, "
2038 "disabling thermal sensors access\n");
2039 thermal_read_mode = TPACPI_THERMAL_NONE;
2040 }
2041 } else {
2042 thermal_read_mode =
2043 (ta2 != 0) ?
2044 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2045 }
2046 } else if (acpi_tmp7) {
2047 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2048 /* 600e/x, 770e, 770x */
2049 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2050 } else {
2051 /* Standard ACPI TMPx access, max 8 sensors */
2052 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2053 }
2054 } else {
2055 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2056 thermal_read_mode = TPACPI_THERMAL_NONE;
2057 }
2058
2059 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2060 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2061 thermal_read_mode);
2062
2063 return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
2064 }
2065
2066 /* idx is zero-based */
2067 static int thermal_get_sensor(int idx, s32 *value)
2068 {
2069 int t;
2070 s8 tmp;
2071 char tmpi[5];
2072
2073 t = TP_EC_THERMAL_TMP0;
2074
2075 switch (thermal_read_mode) {
2076 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2077 case TPACPI_THERMAL_TPEC_16:
2078 if (idx >= 8 && idx <= 15) {
2079 t = TP_EC_THERMAL_TMP8;
2080 idx -= 8;
2081 }
2082 /* fallthrough */
2083 #endif
2084 case TPACPI_THERMAL_TPEC_8:
2085 if (idx <= 7) {
2086 if (!acpi_ec_read(t + idx, &tmp))
2087 return -EIO;
2088 *value = tmp * 1000;
2089 return 0;
2090 }
2091 break;
2092
2093 case TPACPI_THERMAL_ACPI_UPDT:
2094 if (idx <= 7) {
2095 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2096 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2097 return -EIO;
2098 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2099 return -EIO;
2100 *value = (t - 2732) * 100;
2101 return 0;
2102 }
2103 break;
2104
2105 case TPACPI_THERMAL_ACPI_TMP07:
2106 if (idx <= 7) {
2107 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2108 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2109 return -EIO;
2110 *value = t * 1000;
2111 return 0;
2112 }
2113 break;
2114
2115 case TPACPI_THERMAL_NONE:
2116 default:
2117 return -ENOSYS;
2118 }
2119
2120 return -EINVAL;
2121 }
2122
2123 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2124 {
2125 int res, i;
2126 int n;
2127
2128 n = 8;
2129 i = 0;
2130
2131 if (!s)
2132 return -EINVAL;
2133
2134 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2135 n = 16;
2136
2137 for(i = 0 ; i < n; i++) {
2138 res = thermal_get_sensor(i, &s->temp[i]);
2139 if (res)
2140 return res;
2141 }
2142
2143 return n;
2144 }
2145
2146 static int thermal_read(char *p)
2147 {
2148 int len = 0;
2149 int n, i;
2150 struct ibm_thermal_sensors_struct t;
2151
2152 n = thermal_get_sensors(&t);
2153 if (unlikely(n < 0))
2154 return n;
2155
2156 len += sprintf(p + len, "temperatures:\t");
2157
2158 if (n > 0) {
2159 for (i = 0; i < (n - 1); i++)
2160 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2161 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2162 } else
2163 len += sprintf(p + len, "not supported\n");
2164
2165 return len;
2166 }
2167
2168 static struct ibm_struct thermal_driver_data = {
2169 .name = "thermal",
2170 .read = thermal_read,
2171 };
2172
2173 /*************************************************************************
2174 * EC Dump subdriver
2175 */
2176
2177 static u8 ecdump_regs[256];
2178
2179 static int ecdump_read(char *p)
2180 {
2181 int len = 0;
2182 int i, j;
2183 u8 v;
2184
2185 len += sprintf(p + len, "EC "
2186 " +00 +01 +02 +03 +04 +05 +06 +07"
2187 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2188 for (i = 0; i < 256; i += 16) {
2189 len += sprintf(p + len, "EC 0x%02x:", i);
2190 for (j = 0; j < 16; j++) {
2191 if (!acpi_ec_read(i + j, &v))
2192 break;
2193 if (v != ecdump_regs[i + j])
2194 len += sprintf(p + len, " *%02x", v);
2195 else
2196 len += sprintf(p + len, " %02x", v);
2197 ecdump_regs[i + j] = v;
2198 }
2199 len += sprintf(p + len, "\n");
2200 if (j != 16)
2201 break;
2202 }
2203
2204 /* These are way too dangerous to advertise openly... */
2205 #if 0
2206 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2207 " (<offset> is 00-ff, <value> is 00-ff)\n");
2208 len += sprintf(p + len, "commands:\t0x<offset> <value> "
2209 " (<offset> is 00-ff, <value> is 0-255)\n");
2210 #endif
2211 return len;
2212 }
2213
2214 static int ecdump_write(char *buf)
2215 {
2216 char *cmd;
2217 int i, v;
2218
2219 while ((cmd = next_cmd(&buf))) {
2220 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2221 /* i and v set */
2222 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2223 /* i and v set */
2224 } else
2225 return -EINVAL;
2226 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2227 if (!acpi_ec_write(i, v))
2228 return -EIO;
2229 } else
2230 return -EINVAL;
2231 }
2232
2233 return 0;
2234 }
2235
2236 static struct ibm_struct ecdump_driver_data = {
2237 .name = "ecdump",
2238 .read = ecdump_read,
2239 .write = ecdump_write,
2240 .flags.experimental = 1,
2241 };
2242
2243 /*************************************************************************
2244 * Backlight/brightness subdriver
2245 */
2246
2247 static struct backlight_device *ibm_backlight_device = NULL;
2248
2249 static struct backlight_ops ibm_backlight_data = {
2250 .get_brightness = brightness_get,
2251 .update_status = brightness_update_status,
2252 };
2253
2254 static int __init brightness_init(struct ibm_init_struct *iibm)
2255 {
2256 int b;
2257
2258 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2259
2260 b = brightness_get(NULL);
2261 if (b < 0)
2262 return b;
2263
2264 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
2265 &ibm_backlight_data);
2266 if (IS_ERR(ibm_backlight_device)) {
2267 printk(IBM_ERR "Could not register backlight device\n");
2268 return PTR_ERR(ibm_backlight_device);
2269 }
2270 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2271
2272 ibm_backlight_device->props.max_brightness = 7;
2273 ibm_backlight_device->props.brightness = b;
2274 backlight_update_status(ibm_backlight_device);
2275
2276 return 0;
2277 }
2278
2279 static void brightness_exit(void)
2280 {
2281 if (ibm_backlight_device) {
2282 vdbg_printk(TPACPI_DBG_EXIT,
2283 "calling backlight_device_unregister()\n");
2284 backlight_device_unregister(ibm_backlight_device);
2285 ibm_backlight_device = NULL;
2286 }
2287 }
2288
2289 static int brightness_update_status(struct backlight_device *bd)
2290 {
2291 return brightness_set(
2292 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2293 bd->props.power == FB_BLANK_UNBLANK) ?
2294 bd->props.brightness : 0);
2295 }
2296
2297 static int brightness_get(struct backlight_device *bd)
2298 {
2299 u8 level;
2300 if (!acpi_ec_read(brightness_offset, &level))
2301 return -EIO;
2302
2303 level &= 0x7;
2304
2305 return level;
2306 }
2307
2308 static int brightness_set(int value)
2309 {
2310 int cmos_cmd, inc, i;
2311 int current_value = brightness_get(NULL);
2312
2313 value &= 7;
2314
2315 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2316 inc = value > current_value ? 1 : -1;
2317 for (i = current_value; i != value; i += inc) {
2318 if (issue_thinkpad_cmos_command(cmos_cmd))
2319 return -EIO;
2320 if (!acpi_ec_write(brightness_offset, i + inc))
2321 return -EIO;
2322 }
2323
2324 return 0;
2325 }
2326
2327 static int brightness_read(char *p)
2328 {
2329 int len = 0;
2330 int level;
2331
2332 if ((level = brightness_get(NULL)) < 0) {
2333 len += sprintf(p + len, "level:\t\tunreadable\n");
2334 } else {
2335 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2336 len += sprintf(p + len, "commands:\tup, down\n");
2337 len += sprintf(p + len, "commands:\tlevel <level>"
2338 " (<level> is 0-7)\n");
2339 }
2340
2341 return len;
2342 }
2343
2344 static int brightness_write(char *buf)
2345 {
2346 int level;
2347 int new_level;
2348 char *cmd;
2349
2350 while ((cmd = next_cmd(&buf))) {
2351 if ((level = brightness_get(NULL)) < 0)
2352 return level;
2353 level &= 7;
2354
2355 if (strlencmp(cmd, "up") == 0) {
2356 new_level = level == 7 ? 7 : level + 1;
2357 } else if (strlencmp(cmd, "down") == 0) {
2358 new_level = level == 0 ? 0 : level - 1;
2359 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2360 new_level >= 0 && new_level <= 7) {
2361 /* new_level set */
2362 } else
2363 return -EINVAL;
2364
2365 brightness_set(new_level);
2366 }
2367
2368 return 0;
2369 }
2370
2371 static struct ibm_struct brightness_driver_data = {
2372 .name = "brightness",
2373 .read = brightness_read,
2374 .write = brightness_write,
2375 .exit = brightness_exit,
2376 };
2377
2378 /*************************************************************************
2379 * Volume subdriver
2380 */
2381
2382 static int volume_read(char *p)
2383 {
2384 int len = 0;
2385 u8 level;
2386
2387 if (!acpi_ec_read(volume_offset, &level)) {
2388 len += sprintf(p + len, "level:\t\tunreadable\n");
2389 } else {
2390 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2391 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2392 len += sprintf(p + len, "commands:\tup, down, mute\n");
2393 len += sprintf(p + len, "commands:\tlevel <level>"
2394 " (<level> is 0-15)\n");
2395 }
2396
2397 return len;
2398 }
2399
2400 static int volume_write(char *buf)
2401 {
2402 int cmos_cmd, inc, i;
2403 u8 level, mute;
2404 int new_level, new_mute;
2405 char *cmd;
2406
2407 while ((cmd = next_cmd(&buf))) {
2408 if (!acpi_ec_read(volume_offset, &level))
2409 return -EIO;
2410 new_mute = mute = level & 0x40;
2411 new_level = level = level & 0xf;
2412
2413 if (strlencmp(cmd, "up") == 0) {
2414 if (mute)
2415 new_mute = 0;
2416 else
2417 new_level = level == 15 ? 15 : level + 1;
2418 } else if (strlencmp(cmd, "down") == 0) {
2419 if (mute)
2420 new_mute = 0;
2421 else
2422 new_level = level == 0 ? 0 : level - 1;
2423 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2424 new_level >= 0 && new_level <= 15) {
2425 /* new_level set */
2426 } else if (strlencmp(cmd, "mute") == 0) {
2427 new_mute = 0x40;
2428 } else
2429 return -EINVAL;
2430
2431 if (new_level != level) { /* mute doesn't change */
2432 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2433 inc = new_level > level ? 1 : -1;
2434
2435 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2436 !acpi_ec_write(volume_offset, level)))
2437 return -EIO;
2438
2439 for (i = level; i != new_level; i += inc)
2440 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2441 !acpi_ec_write(volume_offset, i + inc))
2442 return -EIO;
2443
2444 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2445 !acpi_ec_write(volume_offset,
2446 new_level + mute)))
2447 return -EIO;
2448 }
2449
2450 if (new_mute != mute) { /* level doesn't change */
2451 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2452
2453 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2454 !acpi_ec_write(volume_offset, level + new_mute))
2455 return -EIO;
2456 }
2457 }
2458
2459 return 0;
2460 }
2461
2462 static struct ibm_struct volume_driver_data = {
2463 .name = "volume",
2464 .read = volume_read,
2465 .write = volume_write,
2466 };
2467
2468 /*************************************************************************
2469 * Fan subdriver
2470 */
2471
2472 /*
2473 * FAN ACCESS MODES
2474 *
2475 * TPACPI_FAN_RD_ACPI_GFAN:
2476 * ACPI GFAN method: returns fan level
2477 *
2478 * see TPACPI_FAN_WR_ACPI_SFAN
2479 * EC 0x2f (HFSP) not available if GFAN exists
2480 *
2481 * TPACPI_FAN_WR_ACPI_SFAN:
2482 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2483 *
2484 * EC 0x2f (HFSP) might be available *for reading*, but do not use
2485 * it for writing.
2486 *
2487 * TPACPI_FAN_WR_TPEC:
2488 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
2489 * Supported on almost all ThinkPads
2490 *
2491 * Fan speed changes of any sort (including those caused by the
2492 * disengaged mode) are usually done slowly by the firmware as the
2493 * maximum ammount of fan duty cycle change per second seems to be
2494 * limited.
2495 *
2496 * Reading is not available if GFAN exists.
2497 * Writing is not available if SFAN exists.
2498 *
2499 * Bits
2500 * 7 automatic mode engaged;
2501 * (default operation mode of the ThinkPad)
2502 * fan level is ignored in this mode.
2503 * 6 full speed mode (takes precedence over bit 7);
2504 * not available on all thinkpads. May disable
2505 * the tachometer while the fan controller ramps up
2506 * the speed (which can take up to a few *minutes*).
2507 * Speeds up fan to 100% duty-cycle, which is far above
2508 * the standard RPM levels. It is not impossible that
2509 * it could cause hardware damage.
2510 * 5-3 unused in some models. Extra bits for fan level
2511 * in others, but still useless as all values above
2512 * 7 map to the same speed as level 7 in these models.
2513 * 2-0 fan level (0..7 usually)
2514 * 0x00 = stop
2515 * 0x07 = max (set when temperatures critical)
2516 * Some ThinkPads may have other levels, see
2517 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2518 *
2519 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2520 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2521 * does so, its initial value is meaningless (0x07).
2522 *
2523 * For firmware bugs, refer to:
2524 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2525 *
2526 * ----
2527 *
2528 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2529 * Main fan tachometer reading (in RPM)
2530 *
2531 * This register is present on all ThinkPads with a new-style EC, and
2532 * it is known not to be present on the A21m/e, and T22, as there is
2533 * something else in offset 0x84 according to the ACPI DSDT. Other
2534 * ThinkPads from this same time period (and earlier) probably lack the
2535 * tachometer as well.
2536 *
2537 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2538 * was never fixed by IBM to report the EC firmware version string
2539 * probably support the tachometer (like the early X models), so
2540 * detecting it is quite hard. We need more data to know for sure.
2541 *
2542 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2543 * might result.
2544 *
2545 * FIRMWARE BUG: may go stale while the EC is switching to full speed
2546 * mode.
2547 *
2548 * For firmware bugs, refer to:
2549 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2550 *
2551 * TPACPI_FAN_WR_ACPI_FANS:
2552 * ThinkPad X31, X40, X41. Not available in the X60.
2553 *
2554 * FANS ACPI handle: takes three arguments: low speed, medium speed,
2555 * high speed. ACPI DSDT seems to map these three speeds to levels
2556 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2557 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2558 *
2559 * The speeds are stored on handles
2560 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2561 *
2562 * There are three default speed sets, acessible as handles:
2563 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2564 *
2565 * ACPI DSDT switches which set is in use depending on various
2566 * factors.
2567 *
2568 * TPACPI_FAN_WR_TPEC is also available and should be used to
2569 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
2570 * but the ACPI tables just mention level 7.
2571 */
2572
2573 static enum fan_status_access_mode fan_status_access_mode;
2574 static enum fan_control_access_mode fan_control_access_mode;
2575 static enum fan_control_commands fan_control_commands;
2576
2577 static u8 fan_control_initial_status;
2578
2579 static void fan_watchdog_fire(struct work_struct *ignored);
2580 static int fan_watchdog_maxinterval;
2581 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
2582
2583 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
2584 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
2585 "\\FSPD", /* 600e/x, 770e, 770x */
2586 ); /* all others */
2587 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
2588 "JFNS", /* 770x-JL */
2589 ); /* all others */
2590
2591 static int __init fan_init(struct ibm_init_struct *iibm)
2592 {
2593 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
2594
2595 mutex_init(&fan_mutex);
2596 fan_status_access_mode = TPACPI_FAN_NONE;
2597 fan_control_access_mode = TPACPI_FAN_WR_NONE;
2598 fan_control_commands = 0;
2599 fan_watchdog_maxinterval = 0;
2600 tp_features.fan_ctrl_status_undef = 0;
2601
2602 IBM_ACPIHANDLE_INIT(fans);
2603 IBM_ACPIHANDLE_INIT(gfan);
2604 IBM_ACPIHANDLE_INIT(sfan);
2605
2606 if (gfan_handle) {
2607 /* 570, 600e/x, 770e, 770x */
2608 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
2609 } else {
2610 /* all other ThinkPads: note that even old-style
2611 * ThinkPad ECs supports the fan control register */
2612 if (likely(acpi_ec_read(fan_status_offset,
2613 &fan_control_initial_status))) {
2614 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
2615
2616 /* In some ThinkPads, neither the EC nor the ACPI
2617 * DSDT initialize the fan status, and it ends up
2618 * being set to 0x07 when it *could* be either
2619 * 0x07 or 0x80.
2620 *
2621 * Enable for TP-1Y (T43), TP-78 (R51e),
2622 * TP-76 (R52), TP-70 (T43, R52), which are known
2623 * to be buggy. */
2624 if (fan_control_initial_status == 0x07 &&
2625 ibm_thinkpad_ec_found &&
2626 ((ibm_thinkpad_ec_found[0] == '1' &&
2627 ibm_thinkpad_ec_found[1] == 'Y') ||
2628 (ibm_thinkpad_ec_found[0] == '7' &&
2629 (ibm_thinkpad_ec_found[1] == '6' ||
2630 ibm_thinkpad_ec_found[1] == '8' ||
2631 ibm_thinkpad_ec_found[1] == '0'))
2632 )) {
2633 printk(IBM_NOTICE
2634 "fan_init: initial fan status is "
2635 "unknown, assuming it is in auto "
2636 "mode\n");
2637 tp_features.fan_ctrl_status_undef = 1;
2638 }
2639 } else {
2640 printk(IBM_ERR
2641 "ThinkPad ACPI EC access misbehaving, "
2642 "fan status and control unavailable\n");
2643 return 1;
2644 }
2645 }
2646
2647 if (sfan_handle) {
2648 /* 570, 770x-JL */
2649 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
2650 fan_control_commands |=
2651 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
2652 } else {
2653 if (!gfan_handle) {
2654 /* gfan without sfan means no fan control */
2655 /* all other models implement TP EC 0x2f control */
2656
2657 if (fans_handle) {
2658 /* X31, X40, X41 */
2659 fan_control_access_mode =
2660 TPACPI_FAN_WR_ACPI_FANS;
2661 fan_control_commands |=
2662 TPACPI_FAN_CMD_SPEED |
2663 TPACPI_FAN_CMD_LEVEL |
2664 TPACPI_FAN_CMD_ENABLE;
2665 } else {
2666 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
2667 fan_control_commands |=
2668 TPACPI_FAN_CMD_LEVEL |
2669 TPACPI_FAN_CMD_ENABLE;
2670 }
2671 }
2672 }
2673
2674 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
2675 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
2676 fan_control_access_mode != TPACPI_FAN_WR_NONE),
2677 fan_status_access_mode, fan_control_access_mode);
2678
2679 return (fan_status_access_mode != TPACPI_FAN_NONE ||
2680 fan_control_access_mode != TPACPI_FAN_WR_NONE)?
2681 0 : 1;
2682 }
2683
2684 static int fan_get_status(u8 *status)
2685 {
2686 u8 s;
2687
2688 /* TODO:
2689 * Add TPACPI_FAN_RD_ACPI_FANS ? */
2690
2691 switch (fan_status_access_mode) {
2692 case TPACPI_FAN_RD_ACPI_GFAN:
2693 /* 570, 600e/x, 770e, 770x */
2694
2695 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
2696 return -EIO;
2697
2698 if (likely(status))
2699 *status = s & 0x07;
2700
2701 break;
2702
2703 case TPACPI_FAN_RD_TPEC:
2704 /* all except 570, 600e/x, 770e, 770x */
2705 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
2706 return -EIO;
2707
2708 if (likely(status))
2709 *status = s;
2710
2711 break;
2712
2713 default:
2714 return -ENXIO;
2715 }
2716
2717 return 0;
2718 }
2719
2720 static void fan_exit(void)
2721 {
2722 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
2723 cancel_delayed_work(&fan_watchdog_task);
2724 flush_scheduled_work();
2725 }
2726
2727 static int fan_get_speed(unsigned int *speed)
2728 {
2729 u8 hi, lo;
2730
2731 switch (fan_status_access_mode) {
2732 case TPACPI_FAN_RD_TPEC:
2733 /* all except 570, 600e/x, 770e, 770x */
2734 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
2735 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
2736 return -EIO;
2737
2738 if (likely(speed))
2739 *speed = (hi << 8) | lo;
2740
2741 break;
2742
2743 default:
2744 return -ENXIO;
2745 }
2746
2747 return 0;
2748 }
2749
2750 static void fan_watchdog_fire(struct work_struct *ignored)
2751 {
2752 int rc;
2753
2754 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2755 rc = fan_set_enable();
2756 if (rc < 0) {
2757 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
2758 "will try again later...\n", -rc);
2759 /* reschedule for later */
2760 fan_watchdog_reset();
2761 }
2762 }
2763
2764 static void fan_watchdog_reset(void)
2765 {
2766 static int fan_watchdog_active = 0;
2767
2768 if (fan_watchdog_active)
2769 cancel_delayed_work(&fan_watchdog_task);
2770
2771 if (fan_watchdog_maxinterval > 0) {
2772 fan_watchdog_active = 1;
2773 if (!schedule_delayed_work(&fan_watchdog_task,
2774 msecs_to_jiffies(fan_watchdog_maxinterval
2775 * 1000))) {
2776 printk(IBM_ERR "failed to schedule the fan watchdog, "
2777 "watchdog will not trigger\n");
2778 }
2779 } else
2780 fan_watchdog_active = 0;
2781 }
2782
2783 static int fan_set_level(int level)
2784 {
2785 int res;
2786
2787 switch (fan_control_access_mode) {
2788 case TPACPI_FAN_WR_ACPI_SFAN:
2789 if (level >= 0 && level <= 7) {
2790 res = mutex_lock_interruptible(&fan_mutex);
2791 if (res < 0)
2792 return res;
2793 res = acpi_evalf(sfan_handle, NULL, NULL, "vd", level);
2794 mutex_unlock(&fan_mutex);
2795 if (!res)
2796 return -EIO;
2797 } else
2798 return -EINVAL;
2799 break;
2800
2801 case TPACPI_FAN_WR_ACPI_FANS:
2802 case TPACPI_FAN_WR_TPEC:
2803 if ((level != TP_EC_FAN_AUTO) &&
2804 (level != TP_EC_FAN_FULLSPEED) &&
2805 ((level < 0) || (level > 7)))
2806 return -EINVAL;
2807
2808 res = mutex_lock_interruptible(&fan_mutex);
2809 if (res < 0)
2810 return res;
2811 res = acpi_ec_write(fan_status_offset, level);
2812 mutex_unlock(&fan_mutex);
2813 if (!res)
2814 return -EIO;
2815 else
2816 tp_features.fan_ctrl_status_undef = 0;
2817 break;
2818
2819 default:
2820 return -ENXIO;
2821 }
2822 return 0;
2823 }
2824
2825 static int fan_set_enable(void)
2826 {
2827 u8 s;
2828 int rc;
2829
2830 rc = mutex_lock_interruptible(&fan_mutex);
2831 if (rc < 0)
2832 return rc;
2833
2834 switch (fan_control_access_mode) {
2835 case TPACPI_FAN_WR_ACPI_FANS:
2836 case TPACPI_FAN_WR_TPEC:
2837 rc = fan_get_status(&s);
2838 if (rc < 0)
2839 break;
2840
2841 /* Don't go out of emergency fan mode */
2842 if (s != 7)
2843 s = TP_EC_FAN_AUTO;
2844
2845 if (!acpi_ec_write(fan_status_offset, s))
2846 rc = -EIO;
2847 else {
2848 tp_features.fan_ctrl_status_undef = 0;
2849 rc = 0;
2850 }
2851 break;
2852
2853 case TPACPI_FAN_WR_ACPI_SFAN:
2854 rc = fan_get_status(&s);
2855 if (rc < 0)
2856 break;
2857
2858 s &= 0x07;
2859
2860 /* Set fan to at least level 4 */
2861 if (s < 4)
2862 s = 4;
2863
2864 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2865 rc= -EIO;
2866 else
2867 rc = 0;
2868 break;
2869
2870 default:
2871 rc = -ENXIO;
2872 }
2873
2874 mutex_unlock(&fan_mutex);
2875 return rc;
2876 }
2877
2878 static int fan_set_disable(void)
2879 {
2880 int rc;
2881
2882 rc = mutex_lock_interruptible(&fan_mutex);
2883 if (rc < 0)
2884 return rc;
2885
2886 rc = 0;
2887 switch (fan_control_access_mode) {
2888 case TPACPI_FAN_WR_ACPI_FANS:
2889 case TPACPI_FAN_WR_TPEC:
2890 if (!acpi_ec_write(fan_status_offset, 0x00))
2891 rc = -EIO;
2892 else
2893 tp_features.fan_ctrl_status_undef = 0;
2894 break;
2895
2896 case TPACPI_FAN_WR_ACPI_SFAN:
2897 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2898 rc = -EIO;
2899 break;
2900
2901 default:
2902 rc = -ENXIO;
2903 }
2904
2905 mutex_unlock(&fan_mutex);
2906 return rc;
2907 }
2908
2909 static int fan_set_speed(int speed)
2910 {
2911 int rc;
2912
2913 rc = mutex_lock_interruptible(&fan_mutex);
2914 if (rc < 0)
2915 return rc;
2916
2917 rc = 0;
2918 switch (fan_control_access_mode) {
2919 case TPACPI_FAN_WR_ACPI_FANS:
2920 if (speed >= 0 && speed <= 65535) {
2921 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2922 speed, speed, speed))
2923 rc = -EIO;
2924 } else
2925 rc = -EINVAL;
2926 break;
2927
2928 default:
2929 rc = -ENXIO;
2930 }
2931
2932 mutex_unlock(&fan_mutex);
2933 return rc;
2934 }
2935
2936 static int fan_read(char *p)
2937 {
2938 int len = 0;
2939 int rc;
2940 u8 status;
2941 unsigned int speed = 0;
2942
2943 switch (fan_status_access_mode) {
2944 case TPACPI_FAN_RD_ACPI_GFAN:
2945 /* 570, 600e/x, 770e, 770x */
2946 if ((rc = fan_get_status(&status)) < 0)
2947 return rc;
2948
2949 len += sprintf(p + len, "status:\t\t%s\n"
2950 "level:\t\t%d\n",
2951 (status != 0) ? "enabled" : "disabled", status);
2952 break;
2953
2954 case TPACPI_FAN_RD_TPEC:
2955 /* all except 570, 600e/x, 770e, 770x */
2956 if ((rc = fan_get_status(&status)) < 0)
2957 return rc;
2958
2959 if (unlikely(tp_features.fan_ctrl_status_undef)) {
2960 if (status != fan_control_initial_status)
2961 tp_features.fan_ctrl_status_undef = 0;
2962 else
2963 /* Return most likely status. In fact, it
2964 * might be the only possible status */
2965 status = TP_EC_FAN_AUTO;
2966 }
2967
2968 len += sprintf(p + len, "status:\t\t%s\n",
2969 (status != 0) ? "enabled" : "disabled");
2970
2971 if ((rc = fan_get_speed(&speed)) < 0)
2972 return rc;
2973
2974 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2975
2976 if (status & TP_EC_FAN_FULLSPEED)
2977 /* Disengaged mode takes precedence */
2978 len += sprintf(p + len, "level:\t\tdisengaged\n");
2979 else if (status & TP_EC_FAN_AUTO)
2980 len += sprintf(p + len, "level:\t\tauto\n");
2981 else
2982 len += sprintf(p + len, "level:\t\t%d\n", status);
2983 break;
2984
2985 case TPACPI_FAN_NONE:
2986 default:
2987 len += sprintf(p + len, "status:\t\tnot supported\n");
2988 }
2989
2990 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
2991 len += sprintf(p + len, "commands:\tlevel <level>");
2992
2993 switch (fan_control_access_mode) {
2994 case TPACPI_FAN_WR_ACPI_SFAN:
2995 len += sprintf(p + len, " (<level> is 0-7)\n");
2996 break;
2997
2998 default:
2999 len += sprintf(p + len, " (<level> is 0-7, "
3000 "auto, disengaged)\n");
3001 break;
3002 }
3003 }
3004
3005 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
3006 len += sprintf(p + len, "commands:\tenable, disable\n"
3007 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
3008 "1-120 (seconds))\n");
3009
3010 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
3011 len += sprintf(p + len, "commands:\tspeed <speed>"
3012 " (<speed> is 0-65535)\n");
3013
3014 return len;
3015 }
3016
3017 static int fan_write_cmd_level(const char *cmd, int *rc)
3018 {
3019 int level;
3020
3021 if (strlencmp(cmd, "level auto") == 0)
3022 level = TP_EC_FAN_AUTO;
3023 else if (strlencmp(cmd, "level disengaged") == 0)
3024 level = TP_EC_FAN_FULLSPEED;
3025 else if (sscanf(cmd, "level %d", &level) != 1)
3026 return 0;
3027
3028 if ((*rc = fan_set_level(level)) == -ENXIO)
3029 printk(IBM_ERR "level command accepted for unsupported "
3030 "access mode %d", fan_control_access_mode);
3031
3032 return 1;
3033 }
3034
3035 static int fan_write_cmd_enable(const char *cmd, int *rc)
3036 {
3037 if (strlencmp(cmd, "enable") != 0)
3038 return 0;
3039
3040 if ((*rc = fan_set_enable()) == -ENXIO)
3041 printk(IBM_ERR "enable command accepted for unsupported "
3042 "access mode %d", fan_control_access_mode);
3043
3044 return 1;
3045 }
3046
3047 static int fan_write_cmd_disable(const char *cmd, int *rc)
3048 {
3049 if (strlencmp(cmd, "disable") != 0)
3050 return 0;
3051
3052 if ((*rc = fan_set_disable()) == -ENXIO)
3053 printk(IBM_ERR "disable command accepted for unsupported "
3054 "access mode %d", fan_control_access_mode);
3055
3056 return 1;
3057 }
3058
3059 static int fan_write_cmd_speed(const char *cmd, int *rc)
3060 {
3061 int speed;
3062
3063 /* TODO:
3064 * Support speed <low> <medium> <high> ? */
3065
3066 if (sscanf(cmd, "speed %d", &speed) != 1)
3067 return 0;
3068
3069 if ((*rc = fan_set_speed(speed)) == -ENXIO)
3070 printk(IBM_ERR "speed command accepted for unsupported "
3071 "access mode %d", fan_control_access_mode);
3072
3073 return 1;
3074 }
3075
3076 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
3077 {
3078 int interval;
3079
3080 if (sscanf(cmd, "watchdog %d", &interval) != 1)
3081 return 0;
3082
3083 if (interval < 0 || interval > 120)
3084 *rc = -EINVAL;
3085 else
3086 fan_watchdog_maxinterval = interval;
3087
3088 return 1;
3089 }
3090
3091 static int fan_write(char *buf)
3092 {
3093 char *cmd;
3094 int rc = 0;
3095
3096 while (!rc && (cmd = next_cmd(&buf))) {
3097 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
3098 fan_write_cmd_level(cmd, &rc)) &&
3099 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
3100 (fan_write_cmd_enable(cmd, &rc) ||
3101 fan_write_cmd_disable(cmd, &rc) ||
3102 fan_write_cmd_watchdog(cmd, &rc))) &&
3103 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
3104 fan_write_cmd_speed(cmd, &rc))
3105 )
3106 rc = -EINVAL;
3107 else if (!rc)
3108 fan_watchdog_reset();
3109 }
3110
3111 return rc;
3112 }
3113
3114 static struct ibm_struct fan_driver_data = {
3115 .name = "fan",
3116 .read = fan_read,
3117 .write = fan_write,
3118 .exit = fan_exit,
3119 .flags.experimental = 1,
3120 };
3121
3122 /****************************************************************************
3123 ****************************************************************************
3124 *
3125 * Infrastructure
3126 *
3127 ****************************************************************************
3128 ****************************************************************************/
3129
3130 /* /proc support */
3131 static struct proc_dir_entry *proc_dir = NULL;
3132
3133 /* Subdriver registry */
3134 static LIST_HEAD(tpacpi_all_drivers);
3135
3136
3137 /*
3138 * Module and infrastructure proble, init and exit handling
3139 */
3140
3141 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
3142 static const char * __init str_supported(int is_supported)
3143 {
3144 static char text_unsupported[] __initdata = "not supported";
3145
3146 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
3147 }
3148 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3149
3150 static int __init ibm_init(struct ibm_init_struct *iibm)
3151 {
3152 int ret;
3153 struct ibm_struct *ibm = iibm->data;
3154 struct proc_dir_entry *entry;
3155
3156 BUG_ON(ibm == NULL);
3157
3158 INIT_LIST_HEAD(&ibm->all_drivers);
3159
3160 if (ibm->flags.experimental && !experimental)
3161 return 0;
3162
3163 dbg_printk(TPACPI_DBG_INIT,
3164 "probing for %s\n", ibm->name);
3165
3166 if (iibm->init) {
3167 ret = iibm->init(iibm);
3168 if (ret > 0)
3169 return 0; /* probe failed */
3170 if (ret)
3171 return ret;
3172
3173 ibm->flags.init_called = 1;
3174 }
3175
3176 if (ibm->acpi) {
3177 if (ibm->acpi->hid) {
3178 ret = register_tpacpi_subdriver(ibm);
3179 if (ret)
3180 goto err_out;
3181 }
3182
3183 if (ibm->acpi->notify) {
3184 ret = setup_acpi_notify(ibm);
3185 if (ret == -ENODEV) {
3186 printk(IBM_NOTICE "disabling subdriver %s\n",
3187 ibm->name);
3188 ret = 0;
3189 goto err_out;
3190 }
3191 if (ret < 0)
3192 goto err_out;
3193 }
3194 }
3195
3196 dbg_printk(TPACPI_DBG_INIT,
3197 "%s installed\n", ibm->name);
3198
3199 if (ibm->read) {
3200 entry = create_proc_entry(ibm->name,
3201 S_IFREG | S_IRUGO | S_IWUSR,
3202 proc_dir);
3203 if (!entry) {
3204 printk(IBM_ERR "unable to create proc entry %s\n",
3205 ibm->name);
3206 ret = -ENODEV;
3207 goto err_out;
3208 }
3209 entry->owner = THIS_MODULE;
3210 entry->data = ibm;
3211 entry->read_proc = &dispatch_procfs_read;
3212 if (ibm->write)
3213 entry->write_proc = &dispatch_procfs_write;
3214 ibm->flags.proc_created = 1;
3215 }
3216
3217 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
3218
3219 return 0;
3220
3221 err_out:
3222 dbg_printk(TPACPI_DBG_INIT,
3223 "%s: at error exit path with result %d\n",
3224 ibm->name, ret);
3225
3226 ibm_exit(ibm);
3227 return (ret < 0)? ret : 0;
3228 }
3229
3230 static void ibm_exit(struct ibm_struct *ibm)
3231 {
3232 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
3233
3234 list_del_init(&ibm->all_drivers);
3235
3236 if (ibm->flags.acpi_notify_installed) {
3237 dbg_printk(TPACPI_DBG_EXIT,
3238 "%s: acpi_remove_notify_handler\n", ibm->name);
3239 BUG_ON(!ibm->acpi);
3240 acpi_remove_notify_handler(*ibm->acpi->handle,
3241 ibm->acpi->type,
3242 dispatch_acpi_notify);
3243 ibm->flags.acpi_notify_installed = 0;
3244 ibm->flags.acpi_notify_installed = 0;
3245 }
3246
3247 if (ibm->flags.proc_created) {
3248 dbg_printk(TPACPI_DBG_EXIT,
3249 "%s: remove_proc_entry\n", ibm->name);
3250 remove_proc_entry(ibm->name, proc_dir);
3251 ibm->flags.proc_created = 0;
3252 }
3253
3254 if (ibm->flags.acpi_driver_registered) {
3255 dbg_printk(TPACPI_DBG_EXIT,
3256 "%s: acpi_bus_unregister_driver\n", ibm->name);
3257 BUG_ON(!ibm->acpi);
3258 acpi_bus_unregister_driver(ibm->acpi->driver);
3259 kfree(ibm->acpi->driver);
3260 ibm->acpi->driver = NULL;
3261 ibm->flags.acpi_driver_registered = 0;
3262 }
3263
3264 if (ibm->flags.init_called && ibm->exit) {
3265 ibm->exit();
3266 ibm->flags.init_called = 0;
3267 }
3268
3269 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
3270 }
3271
3272 /* Probing */
3273
3274 static char *ibm_thinkpad_ec_found = NULL;
3275
3276 static char* __init check_dmi_for_ec(void)
3277 {
3278 struct dmi_device *dev = NULL;
3279 char ec_fw_string[18];
3280
3281 /*
3282 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
3283 * X32 or newer, all Z series; Some models must have an
3284 * up-to-date BIOS or they will not be detected.
3285 *
3286 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
3287 */
3288 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
3289 if (sscanf(dev->name,
3290 "IBM ThinkPad Embedded Controller -[%17c",
3291 ec_fw_string) == 1) {
3292 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
3293 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
3294 return kstrdup(ec_fw_string, GFP_KERNEL);
3295 }
3296 }
3297 return NULL;
3298 }
3299
3300 static int __init probe_for_thinkpad(void)
3301 {
3302 int is_thinkpad;
3303
3304 if (acpi_disabled)
3305 return -ENODEV;
3306
3307 /*
3308 * Non-ancient models have better DMI tagging, but very old models
3309 * don't.
3310 */
3311 is_thinkpad = dmi_name_in_vendors("ThinkPad");
3312
3313 /* ec is required because many other handles are relative to it */
3314 IBM_ACPIHANDLE_INIT(ec);
3315 if (!ec_handle) {
3316 if (is_thinkpad)
3317 printk(IBM_ERR
3318 "Not yet supported ThinkPad detected!\n");
3319 return -ENODEV;
3320 }
3321
3322 /*
3323 * Risks a regression on very old machines, but reduces potential
3324 * false positives a damn great deal
3325 */
3326 if (!is_thinkpad)
3327 is_thinkpad = dmi_name_in_vendors("IBM");
3328
3329 if (!is_thinkpad && !force_load)
3330 return -ENODEV;
3331
3332 return 0;
3333 }
3334
3335
3336 /* Module init, exit, parameters */
3337
3338 static struct ibm_init_struct ibms_init[] __initdata = {
3339 {
3340 .init = thinkpad_acpi_driver_init,
3341 .data = &thinkpad_acpi_driver_data,
3342 },
3343 {
3344 .init = hotkey_init,
3345 .data = &hotkey_driver_data,
3346 },
3347 {
3348 .init = bluetooth_init,
3349 .data = &bluetooth_driver_data,
3350 },
3351 {
3352 .init = wan_init,
3353 .data = &wan_driver_data,
3354 },
3355 {
3356 .init = video_init,
3357 .data = &video_driver_data,
3358 },
3359 {
3360 .init = light_init,
3361 .data = &light_driver_data,
3362 },
3363 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3364 {
3365 .init = dock_init,
3366 .data = &dock_driver_data[0],
3367 },
3368 {
3369 .data = &dock_driver_data[1],
3370 },
3371 #endif
3372 #ifdef CONFIG_THINKPAD_ACPI_BAY
3373 {
3374 .init = bay_init,
3375 .data = &bay_driver_data,
3376 },
3377 #endif
3378 {
3379 .init = cmos_init,
3380 .data = &cmos_driver_data,
3381 },
3382 {
3383 .init = led_init,
3384 .data = &led_driver_data,
3385 },
3386 {
3387 .init = beep_init,
3388 .data = &beep_driver_data,
3389 },
3390 {
3391 .init = thermal_init,
3392 .data = &thermal_driver_data,
3393 },
3394 {
3395 .data = &ecdump_driver_data,
3396 },
3397 {
3398 .init = brightness_init,
3399 .data = &brightness_driver_data,
3400 },
3401 {
3402 .data = &volume_driver_data,
3403 },
3404 {
3405 .init = fan_init,
3406 .data = &fan_driver_data,
3407 },
3408 };
3409
3410 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
3411 {
3412 unsigned int i;
3413 struct ibm_struct *ibm;
3414
3415 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3416 ibm = ibms_init[i].data;
3417 BUG_ON(ibm == NULL);
3418
3419 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
3420 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
3421 return -ENOSPC;
3422 strcpy(ibms_init[i].param, val);
3423 strcat(ibms_init[i].param, ",");
3424 return 0;
3425 }
3426 }
3427
3428 return -EINVAL;
3429 }
3430
3431 static int experimental;
3432 module_param(experimental, int, 0);
3433
3434 static u32 dbg_level;
3435 module_param_named(debug, dbg_level, uint, 0);
3436
3437 static int force_load;
3438 module_param(force_load, int, 0);
3439
3440 #define IBM_PARAM(feature) \
3441 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
3442
3443 IBM_PARAM(hotkey);
3444 IBM_PARAM(bluetooth);
3445 IBM_PARAM(video);
3446 IBM_PARAM(light);
3447 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3448 IBM_PARAM(dock);
3449 #endif
3450 #ifdef CONFIG_THINKPAD_ACPI_BAY
3451 IBM_PARAM(bay);
3452 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3453 IBM_PARAM(cmos);
3454 IBM_PARAM(led);
3455 IBM_PARAM(beep);
3456 IBM_PARAM(ecdump);
3457 IBM_PARAM(brightness);
3458 IBM_PARAM(volume);
3459 IBM_PARAM(fan);
3460
3461 static int __init thinkpad_acpi_module_init(void)
3462 {
3463 int ret, i;
3464
3465 /* Driver-level probe */
3466 ret = probe_for_thinkpad();
3467 if (ret)
3468 return ret;
3469
3470 /* Driver initialization */
3471 ibm_thinkpad_ec_found = check_dmi_for_ec();
3472 IBM_ACPIHANDLE_INIT(ecrd);
3473 IBM_ACPIHANDLE_INIT(ecwr);
3474
3475 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
3476 if (!proc_dir) {
3477 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
3478 thinkpad_acpi_module_exit();
3479 return -ENODEV;
3480 }
3481 proc_dir->owner = THIS_MODULE;
3482
3483 ret = platform_driver_register(&tpacpi_pdriver);
3484 if (ret) {
3485 printk(IBM_ERR "unable to register platform driver\n");
3486 thinkpad_acpi_module_exit();
3487 return ret;
3488 }
3489 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
3490 if (ret) {
3491 printk(IBM_ERR "unable to create sysfs driver attributes\n");
3492 thinkpad_acpi_module_exit();
3493 return ret;
3494 }
3495
3496
3497 /* Device initialization */
3498 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
3499 NULL, 0);
3500 if (IS_ERR(tpacpi_pdev)) {
3501 ret = PTR_ERR(tpacpi_pdev);
3502 tpacpi_pdev = NULL;
3503 printk(IBM_ERR "unable to register platform device\n");
3504 thinkpad_acpi_module_exit();
3505 return ret;
3506 }
3507 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
3508 if (IS_ERR(tpacpi_hwmon)) {
3509 ret = PTR_ERR(tpacpi_hwmon);
3510 tpacpi_hwmon = NULL;
3511 printk(IBM_ERR "unable to register hwmon device\n");
3512 thinkpad_acpi_module_exit();
3513 return ret;
3514 }
3515 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3516 ret = ibm_init(&ibms_init[i]);
3517 if (ret >= 0 && *ibms_init[i].param)
3518 ret = ibms_init[i].data->write(ibms_init[i].param);
3519 if (ret < 0) {
3520 thinkpad_acpi_module_exit();
3521 return ret;
3522 }
3523 }
3524
3525 return 0;
3526 }
3527
3528 static void thinkpad_acpi_module_exit(void)
3529 {
3530 struct ibm_struct *ibm, *itmp;
3531
3532 list_for_each_entry_safe_reverse(ibm, itmp,
3533 &tpacpi_all_drivers,
3534 all_drivers) {
3535 ibm_exit(ibm);
3536 }
3537
3538 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
3539
3540 if (tpacpi_hwmon)
3541 hwmon_device_unregister(tpacpi_hwmon);
3542
3543 if (tpacpi_pdev)
3544 platform_device_unregister(tpacpi_pdev);
3545
3546 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
3547 platform_driver_unregister(&tpacpi_pdriver);
3548
3549 if (proc_dir)
3550 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
3551
3552 kfree(ibm_thinkpad_ec_found);
3553 }
3554
3555 module_init(thinkpad_acpi_module_init);
3556 module_exit(thinkpad_acpi_module_exit);
WandBoard kernel