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Pull acpi-debug into release branch
[deliverable/linux.git] / drivers / misc / thinkpad_acpi.c
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 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
300 name);
301
302 for (i = 0; i < num_paths; i++) {
303 status = acpi_get_handle(parent, paths[i], handle);
304 if (ACPI_SUCCESS(status)) {
305 *path = paths[i];
306 dbg_printk(TPACPI_DBG_INIT,
307 "Found ACPI handle %s for %s\n",
308 *path, name);
309 return;
310 }
311 }
312
313 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
314 name);
315 *handle = NULL;
316 }
317
318 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
319 {
320 struct ibm_struct *ibm = data;
321
322 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
323 return;
324
325 ibm->acpi->notify(ibm, event);
326 }
327
328 static int __init setup_acpi_notify(struct ibm_struct *ibm)
329 {
330 acpi_status status;
331 int rc;
332
333 BUG_ON(!ibm->acpi);
334
335 if (!*ibm->acpi->handle)
336 return 0;
337
338 vdbg_printk(TPACPI_DBG_INIT,
339 "setting up ACPI notify for %s\n", ibm->name);
340
341 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
342 if (rc < 0) {
343 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
344 ibm->name, rc);
345 return -ENODEV;
346 }
347
348 acpi_driver_data(ibm->acpi->device) = ibm;
349 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
350 IBM_ACPI_EVENT_PREFIX,
351 ibm->name);
352
353 status = acpi_install_notify_handler(*ibm->acpi->handle,
354 ibm->acpi->type, dispatch_acpi_notify, ibm);
355 if (ACPI_FAILURE(status)) {
356 if (status == AE_ALREADY_EXISTS) {
357 printk(IBM_NOTICE "another device driver is already handling %s events\n",
358 ibm->name);
359 } else {
360 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
361 ibm->name, status);
362 }
363 return -ENODEV;
364 }
365 ibm->flags.acpi_notify_installed = 1;
366 return 0;
367 }
368
369 static int __init tpacpi_device_add(struct acpi_device *device)
370 {
371 return 0;
372 }
373
374 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
375 {
376 int rc;
377
378 dbg_printk(TPACPI_DBG_INIT,
379 "registering %s as an ACPI driver\n", ibm->name);
380
381 BUG_ON(!ibm->acpi);
382
383 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
384 if (!ibm->acpi->driver) {
385 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
386 return -ENOMEM;
387 }
388
389 sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
390 ibm->acpi->driver->ids = ibm->acpi->hid;
391 ibm->acpi->driver->ops.add = &tpacpi_device_add;
392
393 rc = acpi_bus_register_driver(ibm->acpi->driver);
394 if (rc < 0) {
395 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
396 ibm->acpi->hid, rc);
397 kfree(ibm->acpi->driver);
398 ibm->acpi->driver = NULL;
399 } else if (!rc)
400 ibm->flags.acpi_driver_registered = 1;
401
402 return rc;
403 }
404
405
406 /****************************************************************************
407 ****************************************************************************
408 *
409 * Procfs Helpers
410 *
411 ****************************************************************************
412 ****************************************************************************/
413
414 static int dispatch_procfs_read(char *page, char **start, off_t off,
415 int count, int *eof, void *data)
416 {
417 struct ibm_struct *ibm = data;
418 int len;
419
420 if (!ibm || !ibm->read)
421 return -EINVAL;
422
423 len = ibm->read(page);
424 if (len < 0)
425 return len;
426
427 if (len <= off + count)
428 *eof = 1;
429 *start = page + off;
430 len -= off;
431 if (len > count)
432 len = count;
433 if (len < 0)
434 len = 0;
435
436 return len;
437 }
438
439 static int dispatch_procfs_write(struct file *file,
440 const char __user * userbuf,
441 unsigned long count, void *data)
442 {
443 struct ibm_struct *ibm = data;
444 char *kernbuf;
445 int ret;
446
447 if (!ibm || !ibm->write)
448 return -EINVAL;
449
450 kernbuf = kmalloc(count + 2, GFP_KERNEL);
451 if (!kernbuf)
452 return -ENOMEM;
453
454 if (copy_from_user(kernbuf, userbuf, count)) {
455 kfree(kernbuf);
456 return -EFAULT;
457 }
458
459 kernbuf[count] = 0;
460 strcat(kernbuf, ",");
461 ret = ibm->write(kernbuf);
462 if (ret == 0)
463 ret = count;
464
465 kfree(kernbuf);
466
467 return ret;
468 }
469
470 static char *next_cmd(char **cmds)
471 {
472 char *start = *cmds;
473 char *end;
474
475 while ((end = strchr(start, ',')) && end == start)
476 start = end + 1;
477
478 if (!end)
479 return NULL;
480
481 *end = 0;
482 *cmds = end + 1;
483 return start;
484 }
485
486
487 /****************************************************************************
488 ****************************************************************************
489 *
490 * Device model: hwmon and platform
491 *
492 ****************************************************************************
493 ****************************************************************************/
494
495 static struct platform_device *tpacpi_pdev = NULL;
496 static struct class_device *tpacpi_hwmon = NULL;
497
498 static struct platform_driver tpacpi_pdriver = {
499 .driver = {
500 .name = IBM_DRVR_NAME,
501 .owner = THIS_MODULE,
502 },
503 };
504
505
506 /*************************************************************************
507 * thinkpad-acpi driver attributes
508 */
509
510 /* interface_version --------------------------------------------------- */
511 static ssize_t tpacpi_driver_interface_version_show(
512 struct device_driver *drv,
513 char *buf)
514 {
515 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
516 }
517
518 static DRIVER_ATTR(interface_version, S_IRUGO,
519 tpacpi_driver_interface_version_show, NULL);
520
521 /* debug_level --------------------------------------------------------- */
522 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
523 char *buf)
524 {
525 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
526 }
527
528 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
529 const char *buf, size_t count)
530 {
531 unsigned long t;
532
533 if (parse_strtoul(buf, 0xffff, &t))
534 return -EINVAL;
535
536 dbg_level = t;
537
538 return count;
539 }
540
541 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
542 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
543
544 /* version ------------------------------------------------------------- */
545 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
546 char *buf)
547 {
548 return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
549 }
550
551 static DRIVER_ATTR(version, S_IRUGO,
552 tpacpi_driver_version_show, NULL);
553
554 /* --------------------------------------------------------------------- */
555
556 static struct driver_attribute* tpacpi_driver_attributes[] = {
557 &driver_attr_debug_level, &driver_attr_version,
558 &driver_attr_interface_version,
559 };
560
561 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
562 {
563 int i, res;
564
565 i = 0;
566 res = 0;
567 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
568 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
569 i++;
570 }
571
572 return res;
573 }
574
575 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
576 {
577 int i;
578
579 for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
580 driver_remove_file(drv, tpacpi_driver_attributes[i]);
581 }
582
583 /*************************************************************************
584 * sysfs support helpers
585 */
586
587 struct attribute_set_obj {
588 struct attribute_set s;
589 struct attribute *a;
590 } __attribute__((packed));
591
592 static struct attribute_set *create_attr_set(unsigned int max_members,
593 const char* name)
594 {
595 struct attribute_set_obj *sobj;
596
597 if (max_members == 0)
598 return NULL;
599
600 /* Allocates space for implicit NULL at the end too */
601 sobj = kzalloc(sizeof(struct attribute_set_obj) +
602 max_members * sizeof(struct attribute *),
603 GFP_KERNEL);
604 if (!sobj)
605 return NULL;
606 sobj->s.max_members = max_members;
607 sobj->s.group.attrs = &sobj->a;
608 sobj->s.group.name = name;
609
610 return &sobj->s;
611 }
612
613 /* not multi-threaded safe, use it in a single thread per set */
614 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
615 {
616 if (!s || !attr)
617 return -EINVAL;
618
619 if (s->members >= s->max_members)
620 return -ENOMEM;
621
622 s->group.attrs[s->members] = attr;
623 s->members++;
624
625 return 0;
626 }
627
628 static int add_many_to_attr_set(struct attribute_set* s,
629 struct attribute **attr,
630 unsigned int count)
631 {
632 int i, res;
633
634 for (i = 0; i < count; i++) {
635 res = add_to_attr_set(s, attr[i]);
636 if (res)
637 return res;
638 }
639
640 return 0;
641 }
642
643 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
644 {
645 sysfs_remove_group(kobj, &s->group);
646 destroy_attr_set(s);
647 }
648
649 static int parse_strtoul(const char *buf,
650 unsigned long max, unsigned long *value)
651 {
652 char *endp;
653
654 *value = simple_strtoul(buf, &endp, 0);
655 while (*endp && isspace(*endp))
656 endp++;
657 if (*endp || *value > max)
658 return -EINVAL;
659
660 return 0;
661 }
662
663 /****************************************************************************
664 ****************************************************************************
665 *
666 * Subdrivers
667 *
668 ****************************************************************************
669 ****************************************************************************/
670
671 /*************************************************************************
672 * thinkpad-acpi init subdriver
673 */
674
675 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
676 {
677 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
678 printk(IBM_INFO "%s\n", IBM_URL);
679
680 if (ibm_thinkpad_ec_found)
681 printk(IBM_INFO "ThinkPad EC firmware %s\n",
682 ibm_thinkpad_ec_found);
683
684 return 0;
685 }
686
687 static int thinkpad_acpi_driver_read(char *p)
688 {
689 int len = 0;
690
691 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
692 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
693
694 return len;
695 }
696
697 static struct ibm_struct thinkpad_acpi_driver_data = {
698 .name = "driver",
699 .read = thinkpad_acpi_driver_read,
700 };
701
702 /*************************************************************************
703 * Hotkey subdriver
704 */
705
706 static int hotkey_orig_status;
707 static int hotkey_orig_mask;
708
709 static struct attribute_set *hotkey_dev_attributes = NULL;
710
711 /* sysfs hotkey enable ------------------------------------------------- */
712 static ssize_t hotkey_enable_show(struct device *dev,
713 struct device_attribute *attr,
714 char *buf)
715 {
716 int res, status, mask;
717
718 res = hotkey_get(&status, &mask);
719 if (res)
720 return res;
721
722 return snprintf(buf, PAGE_SIZE, "%d\n", status);
723 }
724
725 static ssize_t hotkey_enable_store(struct device *dev,
726 struct device_attribute *attr,
727 const char *buf, size_t count)
728 {
729 unsigned long t;
730 int res, status, mask;
731
732 if (parse_strtoul(buf, 1, &t))
733 return -EINVAL;
734
735 res = hotkey_get(&status, &mask);
736 if (!res)
737 res = hotkey_set(t, mask);
738
739 return (res) ? res : count;
740 }
741
742 static struct device_attribute dev_attr_hotkey_enable =
743 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
744 hotkey_enable_show, hotkey_enable_store);
745
746 /* sysfs hotkey mask --------------------------------------------------- */
747 static ssize_t hotkey_mask_show(struct device *dev,
748 struct device_attribute *attr,
749 char *buf)
750 {
751 int res, status, mask;
752
753 res = hotkey_get(&status, &mask);
754 if (res)
755 return res;
756
757 return snprintf(buf, PAGE_SIZE, "0x%04x\n", mask);
758 }
759
760 static ssize_t hotkey_mask_store(struct device *dev,
761 struct device_attribute *attr,
762 const char *buf, size_t count)
763 {
764 unsigned long t;
765 int res, status, mask;
766
767 if (parse_strtoul(buf, 0xffff, &t))
768 return -EINVAL;
769
770 res = hotkey_get(&status, &mask);
771 if (!res)
772 hotkey_set(status, t);
773
774 return (res) ? res : count;
775 }
776
777 static struct device_attribute dev_attr_hotkey_mask =
778 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
779 hotkey_mask_show, hotkey_mask_store);
780
781 /* sysfs hotkey bios_enabled ------------------------------------------- */
782 static ssize_t hotkey_bios_enabled_show(struct device *dev,
783 struct device_attribute *attr,
784 char *buf)
785 {
786 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
787 }
788
789 static struct device_attribute dev_attr_hotkey_bios_enabled =
790 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
791
792 /* sysfs hotkey bios_mask ---------------------------------------------- */
793 static ssize_t hotkey_bios_mask_show(struct device *dev,
794 struct device_attribute *attr,
795 char *buf)
796 {
797 return snprintf(buf, PAGE_SIZE, "0x%04x\n", hotkey_orig_mask);
798 }
799
800 static struct device_attribute dev_attr_hotkey_bios_mask =
801 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
802
803 /* --------------------------------------------------------------------- */
804
805 static struct attribute *hotkey_mask_attributes[] = {
806 &dev_attr_hotkey_mask.attr,
807 &dev_attr_hotkey_bios_enabled.attr,
808 &dev_attr_hotkey_bios_mask.attr,
809 };
810
811 static int __init hotkey_init(struct ibm_init_struct *iibm)
812 {
813 int res;
814
815 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
816
817 IBM_ACPIHANDLE_INIT(hkey);
818 mutex_init(&hotkey_mutex);
819
820 /* hotkey not supported on 570 */
821 tp_features.hotkey = hkey_handle != NULL;
822
823 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
824 str_supported(tp_features.hotkey));
825
826 if (tp_features.hotkey) {
827 hotkey_dev_attributes = create_attr_set(4, NULL);
828 if (!hotkey_dev_attributes)
829 return -ENOMEM;
830 res = add_to_attr_set(hotkey_dev_attributes,
831 &dev_attr_hotkey_enable.attr);
832 if (res)
833 return res;
834
835 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
836 A30, R30, R31, T20-22, X20-21, X22-24 */
837 tp_features.hotkey_mask =
838 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
839
840 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
841 str_supported(tp_features.hotkey_mask));
842
843 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
844 if (!res && tp_features.hotkey_mask) {
845 res = add_many_to_attr_set(hotkey_dev_attributes,
846 hotkey_mask_attributes,
847 ARRAY_SIZE(hotkey_mask_attributes));
848 }
849 if (!res)
850 res = register_attr_set_with_sysfs(
851 hotkey_dev_attributes,
852 &tpacpi_pdev->dev.kobj);
853
854 if (res)
855 return res;
856 }
857
858 return (tp_features.hotkey)? 0 : 1;
859 }
860
861 static void hotkey_exit(void)
862 {
863 int res;
864
865 if (tp_features.hotkey) {
866 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
867 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
868 if (res)
869 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
870 }
871
872 if (hotkey_dev_attributes) {
873 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
874 hotkey_dev_attributes = NULL;
875 }
876 }
877
878 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
879 {
880 int hkey;
881
882 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
883 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
884 else {
885 printk(IBM_ERR "unknown hotkey event %d\n", event);
886 acpi_bus_generate_event(ibm->acpi->device, event, 0);
887 }
888 }
889
890 /*
891 * Call with hotkey_mutex held
892 */
893 static int hotkey_get(int *status, int *mask)
894 {
895 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
896 return -EIO;
897
898 if (tp_features.hotkey_mask)
899 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
900 return -EIO;
901
902 return 0;
903 }
904
905 /*
906 * Call with hotkey_mutex held
907 */
908 static int hotkey_set(int status, int mask)
909 {
910 int i;
911
912 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
913 return -EIO;
914
915 if (tp_features.hotkey_mask)
916 for (i = 0; i < 32; i++) {
917 int bit = ((1 << i) & mask) != 0;
918 if (!acpi_evalf(hkey_handle,
919 NULL, "MHKM", "vdd", i + 1, bit))
920 return -EIO;
921 }
922
923 return 0;
924 }
925
926 /* procfs -------------------------------------------------------------- */
927 static int hotkey_read(char *p)
928 {
929 int res, status, mask;
930 int len = 0;
931
932 if (!tp_features.hotkey) {
933 len += sprintf(p + len, "status:\t\tnot supported\n");
934 return len;
935 }
936
937 res = mutex_lock_interruptible(&hotkey_mutex);
938 if (res < 0)
939 return res;
940 res = hotkey_get(&status, &mask);
941 mutex_unlock(&hotkey_mutex);
942 if (res)
943 return res;
944
945 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
946 if (tp_features.hotkey_mask) {
947 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
948 len += sprintf(p + len,
949 "commands:\tenable, disable, reset, <mask>\n");
950 } else {
951 len += sprintf(p + len, "mask:\t\tnot supported\n");
952 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
953 }
954
955 return len;
956 }
957
958 static int hotkey_write(char *buf)
959 {
960 int res, status, mask;
961 char *cmd;
962 int do_cmd = 0;
963
964 if (!tp_features.hotkey)
965 return -ENODEV;
966
967 res = mutex_lock_interruptible(&hotkey_mutex);
968 if (res < 0)
969 return res;
970
971 res = hotkey_get(&status, &mask);
972 if (res)
973 goto errexit;
974
975 res = 0;
976 while ((cmd = next_cmd(&buf))) {
977 if (strlencmp(cmd, "enable") == 0) {
978 status = 1;
979 } else if (strlencmp(cmd, "disable") == 0) {
980 status = 0;
981 } else if (strlencmp(cmd, "reset") == 0) {
982 status = hotkey_orig_status;
983 mask = hotkey_orig_mask;
984 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
985 /* mask set */
986 } else if (sscanf(cmd, "%x", &mask) == 1) {
987 /* mask set */
988 } else {
989 res = -EINVAL;
990 goto errexit;
991 }
992 do_cmd = 1;
993 }
994
995 if (do_cmd)
996 res = hotkey_set(status, mask);
997
998 errexit:
999 mutex_unlock(&hotkey_mutex);
1000 return res;
1001 }
1002
1003 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1004 .hid = IBM_HKEY_HID,
1005 .notify = hotkey_notify,
1006 .handle = &hkey_handle,
1007 .type = ACPI_DEVICE_NOTIFY,
1008 };
1009
1010 static struct ibm_struct hotkey_driver_data = {
1011 .name = "hotkey",
1012 .read = hotkey_read,
1013 .write = hotkey_write,
1014 .exit = hotkey_exit,
1015 .acpi = &ibm_hotkey_acpidriver,
1016 };
1017
1018 /*************************************************************************
1019 * Bluetooth subdriver
1020 */
1021
1022 /* sysfs bluetooth enable ---------------------------------------------- */
1023 static ssize_t bluetooth_enable_show(struct device *dev,
1024 struct device_attribute *attr,
1025 char *buf)
1026 {
1027 int status;
1028
1029 status = bluetooth_get_radiosw();
1030 if (status < 0)
1031 return status;
1032
1033 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1034 }
1035
1036 static ssize_t bluetooth_enable_store(struct device *dev,
1037 struct device_attribute *attr,
1038 const char *buf, size_t count)
1039 {
1040 unsigned long t;
1041 int res;
1042
1043 if (parse_strtoul(buf, 1, &t))
1044 return -EINVAL;
1045
1046 res = bluetooth_set_radiosw(t);
1047
1048 return (res) ? res : count;
1049 }
1050
1051 static struct device_attribute dev_attr_bluetooth_enable =
1052 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1053 bluetooth_enable_show, bluetooth_enable_store);
1054
1055 /* --------------------------------------------------------------------- */
1056
1057 static struct attribute *bluetooth_attributes[] = {
1058 &dev_attr_bluetooth_enable.attr,
1059 NULL
1060 };
1061
1062 static const struct attribute_group bluetooth_attr_group = {
1063 .attrs = bluetooth_attributes,
1064 };
1065
1066 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1067 {
1068 int res;
1069 int status = 0;
1070
1071 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1072
1073 IBM_ACPIHANDLE_INIT(hkey);
1074
1075 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1076 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1077 tp_features.bluetooth = hkey_handle &&
1078 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1079
1080 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1081 str_supported(tp_features.bluetooth),
1082 status);
1083
1084 if (tp_features.bluetooth) {
1085 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1086 /* no bluetooth hardware present in system */
1087 tp_features.bluetooth = 0;
1088 dbg_printk(TPACPI_DBG_INIT,
1089 "bluetooth hardware not installed\n");
1090 } else {
1091 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1092 &bluetooth_attr_group);
1093 if (res)
1094 return res;
1095 }
1096 }
1097
1098 return (tp_features.bluetooth)? 0 : 1;
1099 }
1100
1101 static void bluetooth_exit(void)
1102 {
1103 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1104 &bluetooth_attr_group);
1105 }
1106
1107 static int bluetooth_get_radiosw(void)
1108 {
1109 int status;
1110
1111 if (!tp_features.bluetooth)
1112 return -ENODEV;
1113
1114 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1115 return -EIO;
1116
1117 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1118 }
1119
1120 static int bluetooth_set_radiosw(int radio_on)
1121 {
1122 int status;
1123
1124 if (!tp_features.bluetooth)
1125 return -ENODEV;
1126
1127 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1128 return -EIO;
1129 if (radio_on)
1130 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1131 else
1132 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1133 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1134 return -EIO;
1135
1136 return 0;
1137 }
1138
1139 /* procfs -------------------------------------------------------------- */
1140 static int bluetooth_read(char *p)
1141 {
1142 int len = 0;
1143 int status = bluetooth_get_radiosw();
1144
1145 if (!tp_features.bluetooth)
1146 len += sprintf(p + len, "status:\t\tnot supported\n");
1147 else {
1148 len += sprintf(p + len, "status:\t\t%s\n",
1149 (status)? "enabled" : "disabled");
1150 len += sprintf(p + len, "commands:\tenable, disable\n");
1151 }
1152
1153 return len;
1154 }
1155
1156 static int bluetooth_write(char *buf)
1157 {
1158 char *cmd;
1159
1160 if (!tp_features.bluetooth)
1161 return -ENODEV;
1162
1163 while ((cmd = next_cmd(&buf))) {
1164 if (strlencmp(cmd, "enable") == 0) {
1165 bluetooth_set_radiosw(1);
1166 } else if (strlencmp(cmd, "disable") == 0) {
1167 bluetooth_set_radiosw(0);
1168 } else
1169 return -EINVAL;
1170 }
1171
1172 return 0;
1173 }
1174
1175 static struct ibm_struct bluetooth_driver_data = {
1176 .name = "bluetooth",
1177 .read = bluetooth_read,
1178 .write = bluetooth_write,
1179 .exit = bluetooth_exit,
1180 };
1181
1182 /*************************************************************************
1183 * Wan subdriver
1184 */
1185
1186 /* sysfs wan enable ---------------------------------------------------- */
1187 static ssize_t wan_enable_show(struct device *dev,
1188 struct device_attribute *attr,
1189 char *buf)
1190 {
1191 int status;
1192
1193 status = wan_get_radiosw();
1194 if (status < 0)
1195 return status;
1196
1197 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1198 }
1199
1200 static ssize_t wan_enable_store(struct device *dev,
1201 struct device_attribute *attr,
1202 const char *buf, size_t count)
1203 {
1204 unsigned long t;
1205 int res;
1206
1207 if (parse_strtoul(buf, 1, &t))
1208 return -EINVAL;
1209
1210 res = wan_set_radiosw(t);
1211
1212 return (res) ? res : count;
1213 }
1214
1215 static struct device_attribute dev_attr_wan_enable =
1216 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1217 wan_enable_show, wan_enable_store);
1218
1219 /* --------------------------------------------------------------------- */
1220
1221 static struct attribute *wan_attributes[] = {
1222 &dev_attr_wan_enable.attr,
1223 NULL
1224 };
1225
1226 static const struct attribute_group wan_attr_group = {
1227 .attrs = wan_attributes,
1228 };
1229
1230 static int __init wan_init(struct ibm_init_struct *iibm)
1231 {
1232 int res;
1233 int status = 0;
1234
1235 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1236
1237 IBM_ACPIHANDLE_INIT(hkey);
1238
1239 tp_features.wan = hkey_handle &&
1240 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1241
1242 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1243 str_supported(tp_features.wan),
1244 status);
1245
1246 if (tp_features.wan) {
1247 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1248 /* no wan hardware present in system */
1249 tp_features.wan = 0;
1250 dbg_printk(TPACPI_DBG_INIT,
1251 "wan hardware not installed\n");
1252 } else {
1253 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1254 &wan_attr_group);
1255 if (res)
1256 return res;
1257 }
1258 }
1259
1260 return (tp_features.wan)? 0 : 1;
1261 }
1262
1263 static void wan_exit(void)
1264 {
1265 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1266 &wan_attr_group);
1267 }
1268
1269 static int wan_get_radiosw(void)
1270 {
1271 int status;
1272
1273 if (!tp_features.wan)
1274 return -ENODEV;
1275
1276 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1277 return -EIO;
1278
1279 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1280 }
1281
1282 static int wan_set_radiosw(int radio_on)
1283 {
1284 int status;
1285
1286 if (!tp_features.wan)
1287 return -ENODEV;
1288
1289 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1290 return -EIO;
1291 if (radio_on)
1292 status |= TP_ACPI_WANCARD_RADIOSSW;
1293 else
1294 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1295 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1296 return -EIO;
1297
1298 return 0;
1299 }
1300
1301 /* procfs -------------------------------------------------------------- */
1302 static int wan_read(char *p)
1303 {
1304 int len = 0;
1305 int status = wan_get_radiosw();
1306
1307 if (!tp_features.wan)
1308 len += sprintf(p + len, "status:\t\tnot supported\n");
1309 else {
1310 len += sprintf(p + len, "status:\t\t%s\n",
1311 (status)? "enabled" : "disabled");
1312 len += sprintf(p + len, "commands:\tenable, disable\n");
1313 }
1314
1315 return len;
1316 }
1317
1318 static int wan_write(char *buf)
1319 {
1320 char *cmd;
1321
1322 if (!tp_features.wan)
1323 return -ENODEV;
1324
1325 while ((cmd = next_cmd(&buf))) {
1326 if (strlencmp(cmd, "enable") == 0) {
1327 wan_set_radiosw(1);
1328 } else if (strlencmp(cmd, "disable") == 0) {
1329 wan_set_radiosw(0);
1330 } else
1331 return -EINVAL;
1332 }
1333
1334 return 0;
1335 }
1336
1337 static struct ibm_struct wan_driver_data = {
1338 .name = "wan",
1339 .read = wan_read,
1340 .write = wan_write,
1341 .exit = wan_exit,
1342 .flags.experimental = 1,
1343 };
1344
1345 /*************************************************************************
1346 * Video subdriver
1347 */
1348
1349 static enum video_access_mode video_supported;
1350 static int video_orig_autosw;
1351
1352 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1353 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1354 "\\_SB.PCI0.VID0", /* 770e */
1355 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1356 "\\_SB.PCI0.AGP.VID", /* all others */
1357 ); /* R30, R31 */
1358
1359 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1360
1361 static int __init video_init(struct ibm_init_struct *iibm)
1362 {
1363 int ivga;
1364
1365 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1366
1367 IBM_ACPIHANDLE_INIT(vid);
1368 IBM_ACPIHANDLE_INIT(vid2);
1369
1370 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1371 /* G41, assume IVGA doesn't change */
1372 vid_handle = vid2_handle;
1373
1374 if (!vid_handle)
1375 /* video switching not supported on R30, R31 */
1376 video_supported = TPACPI_VIDEO_NONE;
1377 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1378 /* 570 */
1379 video_supported = TPACPI_VIDEO_570;
1380 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1381 /* 600e/x, 770e, 770x */
1382 video_supported = TPACPI_VIDEO_770;
1383 else
1384 /* all others */
1385 video_supported = TPACPI_VIDEO_NEW;
1386
1387 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1388 str_supported(video_supported != TPACPI_VIDEO_NONE),
1389 video_supported);
1390
1391 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1392 }
1393
1394 static void video_exit(void)
1395 {
1396 dbg_printk(TPACPI_DBG_EXIT,
1397 "restoring original video autoswitch mode\n");
1398 if (video_autosw_set(video_orig_autosw))
1399 printk(IBM_ERR "error while trying to restore original "
1400 "video autoswitch mode\n");
1401 }
1402
1403 static int video_outputsw_get(void)
1404 {
1405 int status = 0;
1406 int i;
1407
1408 switch (video_supported) {
1409 case TPACPI_VIDEO_570:
1410 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1411 TP_ACPI_VIDEO_570_PHSCMD))
1412 return -EIO;
1413 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1414 break;
1415 case TPACPI_VIDEO_770:
1416 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1417 return -EIO;
1418 if (i)
1419 status |= TP_ACPI_VIDEO_S_LCD;
1420 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1421 return -EIO;
1422 if (i)
1423 status |= TP_ACPI_VIDEO_S_CRT;
1424 break;
1425 case TPACPI_VIDEO_NEW:
1426 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1427 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1428 return -EIO;
1429 if (i)
1430 status |= TP_ACPI_VIDEO_S_CRT;
1431
1432 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1433 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1434 return -EIO;
1435 if (i)
1436 status |= TP_ACPI_VIDEO_S_LCD;
1437 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1438 return -EIO;
1439 if (i)
1440 status |= TP_ACPI_VIDEO_S_DVI;
1441 break;
1442 default:
1443 return -ENOSYS;
1444 }
1445
1446 return status;
1447 }
1448
1449 static int video_outputsw_set(int status)
1450 {
1451 int autosw;
1452 int res = 0;
1453
1454 switch (video_supported) {
1455 case TPACPI_VIDEO_570:
1456 res = acpi_evalf(NULL, NULL,
1457 "\\_SB.PHS2", "vdd",
1458 TP_ACPI_VIDEO_570_PHS2CMD,
1459 status | TP_ACPI_VIDEO_570_PHS2SET);
1460 break;
1461 case TPACPI_VIDEO_770:
1462 autosw = video_autosw_get();
1463 if (autosw < 0)
1464 return autosw;
1465
1466 res = video_autosw_set(1);
1467 if (res)
1468 return res;
1469 res = acpi_evalf(vid_handle, NULL,
1470 "ASWT", "vdd", status * 0x100, 0);
1471 if (!autosw && video_autosw_set(autosw)) {
1472 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1473 return -EIO;
1474 }
1475 break;
1476 case TPACPI_VIDEO_NEW:
1477 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1478 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1479 break;
1480 default:
1481 return -ENOSYS;
1482 }
1483
1484 return (res)? 0 : -EIO;
1485 }
1486
1487 static int video_autosw_get(void)
1488 {
1489 int autosw = 0;
1490
1491 switch (video_supported) {
1492 case TPACPI_VIDEO_570:
1493 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1494 return -EIO;
1495 break;
1496 case TPACPI_VIDEO_770:
1497 case TPACPI_VIDEO_NEW:
1498 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1499 return -EIO;
1500 break;
1501 default:
1502 return -ENOSYS;
1503 }
1504
1505 return autosw & 1;
1506 }
1507
1508 static int video_autosw_set(int enable)
1509 {
1510 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1511 return -EIO;
1512 return 0;
1513 }
1514
1515 static int video_outputsw_cycle(void)
1516 {
1517 int autosw = video_autosw_get();
1518 int res;
1519
1520 if (autosw < 0)
1521 return autosw;
1522
1523 switch (video_supported) {
1524 case TPACPI_VIDEO_570:
1525 res = video_autosw_set(1);
1526 if (res)
1527 return res;
1528 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1529 break;
1530 case TPACPI_VIDEO_770:
1531 case TPACPI_VIDEO_NEW:
1532 res = video_autosw_set(1);
1533 if (res)
1534 return res;
1535 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1536 break;
1537 default:
1538 return -ENOSYS;
1539 }
1540 if (!autosw && video_autosw_set(autosw)) {
1541 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1542 return -EIO;
1543 }
1544
1545 return (res)? 0 : -EIO;
1546 }
1547
1548 static int video_expand_toggle(void)
1549 {
1550 switch (video_supported) {
1551 case TPACPI_VIDEO_570:
1552 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1553 0 : -EIO;
1554 case TPACPI_VIDEO_770:
1555 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1556 0 : -EIO;
1557 case TPACPI_VIDEO_NEW:
1558 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1559 0 : -EIO;
1560 default:
1561 return -ENOSYS;
1562 }
1563 /* not reached */
1564 }
1565
1566 static int video_read(char *p)
1567 {
1568 int status, autosw;
1569 int len = 0;
1570
1571 if (video_supported == TPACPI_VIDEO_NONE) {
1572 len += sprintf(p + len, "status:\t\tnot supported\n");
1573 return len;
1574 }
1575
1576 status = video_outputsw_get();
1577 if (status < 0)
1578 return status;
1579
1580 autosw = video_autosw_get();
1581 if (autosw < 0)
1582 return autosw;
1583
1584 len += sprintf(p + len, "status:\t\tsupported\n");
1585 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1586 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1587 if (video_supported == TPACPI_VIDEO_NEW)
1588 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1589 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1590 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1591 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1592 if (video_supported == TPACPI_VIDEO_NEW)
1593 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1594 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1595 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1596
1597 return len;
1598 }
1599
1600 static int video_write(char *buf)
1601 {
1602 char *cmd;
1603 int enable, disable, status;
1604 int res;
1605
1606 if (video_supported == TPACPI_VIDEO_NONE)
1607 return -ENODEV;
1608
1609 enable = 0;
1610 disable = 0;
1611
1612 while ((cmd = next_cmd(&buf))) {
1613 if (strlencmp(cmd, "lcd_enable") == 0) {
1614 enable |= TP_ACPI_VIDEO_S_LCD;
1615 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1616 disable |= TP_ACPI_VIDEO_S_LCD;
1617 } else if (strlencmp(cmd, "crt_enable") == 0) {
1618 enable |= TP_ACPI_VIDEO_S_CRT;
1619 } else if (strlencmp(cmd, "crt_disable") == 0) {
1620 disable |= TP_ACPI_VIDEO_S_CRT;
1621 } else if (video_supported == TPACPI_VIDEO_NEW &&
1622 strlencmp(cmd, "dvi_enable") == 0) {
1623 enable |= TP_ACPI_VIDEO_S_DVI;
1624 } else if (video_supported == TPACPI_VIDEO_NEW &&
1625 strlencmp(cmd, "dvi_disable") == 0) {
1626 disable |= TP_ACPI_VIDEO_S_DVI;
1627 } else if (strlencmp(cmd, "auto_enable") == 0) {
1628 res = video_autosw_set(1);
1629 if (res)
1630 return res;
1631 } else if (strlencmp(cmd, "auto_disable") == 0) {
1632 res = video_autosw_set(0);
1633 if (res)
1634 return res;
1635 } else if (strlencmp(cmd, "video_switch") == 0) {
1636 res = video_outputsw_cycle();
1637 if (res)
1638 return res;
1639 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1640 res = video_expand_toggle();
1641 if (res)
1642 return res;
1643 } else
1644 return -EINVAL;
1645 }
1646
1647 if (enable || disable) {
1648 status = video_outputsw_get();
1649 if (status < 0)
1650 return status;
1651 res = video_outputsw_set((status & ~disable) | enable);
1652 if (res)
1653 return res;
1654 }
1655
1656 return 0;
1657 }
1658
1659 static struct ibm_struct video_driver_data = {
1660 .name = "video",
1661 .read = video_read,
1662 .write = video_write,
1663 .exit = video_exit,
1664 };
1665
1666 /*************************************************************************
1667 * Light (thinklight) subdriver
1668 */
1669
1670 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1671 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1672
1673 static int __init light_init(struct ibm_init_struct *iibm)
1674 {
1675 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1676
1677 IBM_ACPIHANDLE_INIT(ledb);
1678 IBM_ACPIHANDLE_INIT(lght);
1679 IBM_ACPIHANDLE_INIT(cmos);
1680
1681 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1682 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1683
1684 if (tp_features.light)
1685 /* light status not supported on
1686 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1687 tp_features.light_status =
1688 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1689
1690 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1691 str_supported(tp_features.light));
1692
1693 return (tp_features.light)? 0 : 1;
1694 }
1695
1696 static int light_read(char *p)
1697 {
1698 int len = 0;
1699 int status = 0;
1700
1701 if (!tp_features.light) {
1702 len += sprintf(p + len, "status:\t\tnot supported\n");
1703 } else if (!tp_features.light_status) {
1704 len += sprintf(p + len, "status:\t\tunknown\n");
1705 len += sprintf(p + len, "commands:\ton, off\n");
1706 } else {
1707 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1708 return -EIO;
1709 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1710 len += sprintf(p + len, "commands:\ton, off\n");
1711 }
1712
1713 return len;
1714 }
1715
1716 static int light_write(char *buf)
1717 {
1718 int cmos_cmd, lght_cmd;
1719 char *cmd;
1720 int success;
1721
1722 if (!tp_features.light)
1723 return -ENODEV;
1724
1725 while ((cmd = next_cmd(&buf))) {
1726 if (strlencmp(cmd, "on") == 0) {
1727 cmos_cmd = 0x0c;
1728 lght_cmd = 1;
1729 } else if (strlencmp(cmd, "off") == 0) {
1730 cmos_cmd = 0x0d;
1731 lght_cmd = 0;
1732 } else
1733 return -EINVAL;
1734
1735 success = cmos_handle ?
1736 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1737 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1738 if (!success)
1739 return -EIO;
1740 }
1741
1742 return 0;
1743 }
1744
1745 static struct ibm_struct light_driver_data = {
1746 .name = "light",
1747 .read = light_read,
1748 .write = light_write,
1749 };
1750
1751 /*************************************************************************
1752 * Dock subdriver
1753 */
1754
1755 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1756
1757 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1758 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1759 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1760 "\\_SB.PCI.ISA.SLCE", /* 570 */
1761 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1762
1763 /* don't list other alternatives as we install a notify handler on the 570 */
1764 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1765
1766 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1767 {
1768 .notify = dock_notify,
1769 .handle = &dock_handle,
1770 .type = ACPI_SYSTEM_NOTIFY,
1771 },
1772 {
1773 .hid = IBM_PCI_HID,
1774 .notify = dock_notify,
1775 .handle = &pci_handle,
1776 .type = ACPI_SYSTEM_NOTIFY,
1777 },
1778 };
1779
1780 static struct ibm_struct dock_driver_data[2] = {
1781 {
1782 .name = "dock",
1783 .read = dock_read,
1784 .write = dock_write,
1785 .acpi = &ibm_dock_acpidriver[0],
1786 },
1787 {
1788 .name = "dock",
1789 .acpi = &ibm_dock_acpidriver[1],
1790 },
1791 };
1792
1793 #define dock_docked() (_sta(dock_handle) & 1)
1794
1795 static int __init dock_init(struct ibm_init_struct *iibm)
1796 {
1797 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1798
1799 IBM_ACPIHANDLE_INIT(dock);
1800
1801 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1802 str_supported(dock_handle != NULL));
1803
1804 return (dock_handle)? 0 : 1;
1805 }
1806
1807 static int __init dock_init2(struct ibm_init_struct *iibm)
1808 {
1809 int dock2_needed;
1810
1811 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
1812
1813 if (dock_driver_data[0].flags.acpi_driver_registered &&
1814 dock_driver_data[0].flags.acpi_notify_installed) {
1815 IBM_ACPIHANDLE_INIT(pci);
1816 dock2_needed = (pci_handle != NULL);
1817 vdbg_printk(TPACPI_DBG_INIT,
1818 "dock PCI handler for the TP 570 is %s\n",
1819 str_supported(dock2_needed));
1820 } else {
1821 vdbg_printk(TPACPI_DBG_INIT,
1822 "dock subdriver part 2 not required\n");
1823 dock2_needed = 0;
1824 }
1825
1826 return (dock2_needed)? 0 : 1;
1827 }
1828
1829 static void dock_notify(struct ibm_struct *ibm, u32 event)
1830 {
1831 int docked = dock_docked();
1832 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1833
1834 if (event == 1 && !pci) /* 570 */
1835 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1836 else if (event == 1 && pci) /* 570 */
1837 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1838 else if (event == 3 && docked)
1839 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1840 else if (event == 3 && !docked)
1841 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
1842 else if (event == 0 && docked)
1843 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1844 else {
1845 printk(IBM_ERR "unknown dock event %d, status %d\n",
1846 event, _sta(dock_handle));
1847 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
1848 }
1849 }
1850
1851 static int dock_read(char *p)
1852 {
1853 int len = 0;
1854 int docked = dock_docked();
1855
1856 if (!dock_handle)
1857 len += sprintf(p + len, "status:\t\tnot supported\n");
1858 else if (!docked)
1859 len += sprintf(p + len, "status:\t\tundocked\n");
1860 else {
1861 len += sprintf(p + len, "status:\t\tdocked\n");
1862 len += sprintf(p + len, "commands:\tdock, undock\n");
1863 }
1864
1865 return len;
1866 }
1867
1868 static int dock_write(char *buf)
1869 {
1870 char *cmd;
1871
1872 if (!dock_docked())
1873 return -ENODEV;
1874
1875 while ((cmd = next_cmd(&buf))) {
1876 if (strlencmp(cmd, "undock") == 0) {
1877 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1878 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1879 return -EIO;
1880 } else if (strlencmp(cmd, "dock") == 0) {
1881 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1882 return -EIO;
1883 } else
1884 return -EINVAL;
1885 }
1886
1887 return 0;
1888 }
1889
1890 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1891
1892 /*************************************************************************
1893 * Bay subdriver
1894 */
1895
1896 #ifdef CONFIG_THINKPAD_ACPI_BAY
1897 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1898 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1899 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1900 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1901 ); /* A21e, R30, R31 */
1902 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1903 "_EJ0", /* all others */
1904 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1905 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1906 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1907 ); /* all others */
1908 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1909 "_EJ0", /* 770x */
1910 ); /* all others */
1911
1912 static int __init bay_init(struct ibm_init_struct *iibm)
1913 {
1914 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1915
1916 IBM_ACPIHANDLE_INIT(bay);
1917 if (bay_handle)
1918 IBM_ACPIHANDLE_INIT(bay_ej);
1919 IBM_ACPIHANDLE_INIT(bay2);
1920 if (bay2_handle)
1921 IBM_ACPIHANDLE_INIT(bay2_ej);
1922
1923 tp_features.bay_status = bay_handle &&
1924 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1925 tp_features.bay_status2 = bay2_handle &&
1926 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1927
1928 tp_features.bay_eject = bay_handle && bay_ej_handle &&
1929 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1930 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1931 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1932
1933 vdbg_printk(TPACPI_DBG_INIT,
1934 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1935 str_supported(tp_features.bay_status),
1936 str_supported(tp_features.bay_eject),
1937 str_supported(tp_features.bay_status2),
1938 str_supported(tp_features.bay_eject2));
1939
1940 return (tp_features.bay_status || tp_features.bay_eject ||
1941 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1942 }
1943
1944 static void bay_notify(struct ibm_struct *ibm, u32 event)
1945 {
1946 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1947 }
1948
1949 #define bay_occupied(b) (_sta(b##_handle) & 1)
1950
1951 static int bay_read(char *p)
1952 {
1953 int len = 0;
1954 int occupied = bay_occupied(bay);
1955 int occupied2 = bay_occupied(bay2);
1956 int eject, eject2;
1957
1958 len += sprintf(p + len, "status:\t\t%s\n",
1959 tp_features.bay_status ?
1960 (occupied ? "occupied" : "unoccupied") :
1961 "not supported");
1962 if (tp_features.bay_status2)
1963 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1964 "occupied" : "unoccupied");
1965
1966 eject = tp_features.bay_eject && occupied;
1967 eject2 = tp_features.bay_eject2 && occupied2;
1968
1969 if (eject && eject2)
1970 len += sprintf(p + len, "commands:\teject, eject2\n");
1971 else if (eject)
1972 len += sprintf(p + len, "commands:\teject\n");
1973 else if (eject2)
1974 len += sprintf(p + len, "commands:\teject2\n");
1975
1976 return len;
1977 }
1978
1979 static int bay_write(char *buf)
1980 {
1981 char *cmd;
1982
1983 if (!tp_features.bay_eject && !tp_features.bay_eject2)
1984 return -ENODEV;
1985
1986 while ((cmd = next_cmd(&buf))) {
1987 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1988 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1989 return -EIO;
1990 } else if (tp_features.bay_eject2 &&
1991 strlencmp(cmd, "eject2") == 0) {
1992 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1993 return -EIO;
1994 } else
1995 return -EINVAL;
1996 }
1997
1998 return 0;
1999 }
2000
2001 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2002 .notify = bay_notify,
2003 .handle = &bay_handle,
2004 .type = ACPI_SYSTEM_NOTIFY,
2005 };
2006
2007 static struct ibm_struct bay_driver_data = {
2008 .name = "bay",
2009 .read = bay_read,
2010 .write = bay_write,
2011 .acpi = &ibm_bay_acpidriver,
2012 };
2013
2014 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2015
2016 /*************************************************************************
2017 * CMOS subdriver
2018 */
2019
2020 /* sysfs cmos_command -------------------------------------------------- */
2021 static ssize_t cmos_command_store(struct device *dev,
2022 struct device_attribute *attr,
2023 const char *buf, size_t count)
2024 {
2025 unsigned long cmos_cmd;
2026 int res;
2027
2028 if (parse_strtoul(buf, 21, &cmos_cmd))
2029 return -EINVAL;
2030
2031 res = issue_thinkpad_cmos_command(cmos_cmd);
2032 return (res)? res : count;
2033 }
2034
2035 static struct device_attribute dev_attr_cmos_command =
2036 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2037
2038 /* --------------------------------------------------------------------- */
2039
2040 static int __init cmos_init(struct ibm_init_struct *iibm)
2041 {
2042 int res;
2043
2044 vdbg_printk(TPACPI_DBG_INIT,
2045 "initializing cmos commands subdriver\n");
2046
2047 IBM_ACPIHANDLE_INIT(cmos);
2048
2049 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2050 str_supported(cmos_handle != NULL));
2051
2052 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2053 if (res)
2054 return res;
2055
2056 return (cmos_handle)? 0 : 1;
2057 }
2058
2059 static void cmos_exit(void)
2060 {
2061 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2062 }
2063
2064 static int cmos_read(char *p)
2065 {
2066 int len = 0;
2067
2068 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2069 R30, R31, T20-22, X20-21 */
2070 if (!cmos_handle)
2071 len += sprintf(p + len, "status:\t\tnot supported\n");
2072 else {
2073 len += sprintf(p + len, "status:\t\tsupported\n");
2074 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2075 }
2076
2077 return len;
2078 }
2079
2080 static int cmos_write(char *buf)
2081 {
2082 char *cmd;
2083 int cmos_cmd, res;
2084
2085 while ((cmd = next_cmd(&buf))) {
2086 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2087 cmos_cmd >= 0 && cmos_cmd <= 21) {
2088 /* cmos_cmd set */
2089 } else
2090 return -EINVAL;
2091
2092 res = issue_thinkpad_cmos_command(cmos_cmd);
2093 if (res)
2094 return res;
2095 }
2096
2097 return 0;
2098 }
2099
2100 static struct ibm_struct cmos_driver_data = {
2101 .name = "cmos",
2102 .read = cmos_read,
2103 .write = cmos_write,
2104 .exit = cmos_exit,
2105 };
2106
2107 /*************************************************************************
2108 * LED subdriver
2109 */
2110
2111 static enum led_access_mode led_supported;
2112
2113 IBM_HANDLE(led, ec, "SLED", /* 570 */
2114 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2115 "LED", /* all others */
2116 ); /* R30, R31 */
2117
2118 static int __init led_init(struct ibm_init_struct *iibm)
2119 {
2120 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2121
2122 IBM_ACPIHANDLE_INIT(led);
2123
2124 if (!led_handle)
2125 /* led not supported on R30, R31 */
2126 led_supported = TPACPI_LED_NONE;
2127 else if (strlencmp(led_path, "SLED") == 0)
2128 /* 570 */
2129 led_supported = TPACPI_LED_570;
2130 else if (strlencmp(led_path, "SYSL") == 0)
2131 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2132 led_supported = TPACPI_LED_OLD;
2133 else
2134 /* all others */
2135 led_supported = TPACPI_LED_NEW;
2136
2137 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2138 str_supported(led_supported), led_supported);
2139
2140 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2141 }
2142
2143 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2144
2145 static int led_read(char *p)
2146 {
2147 int len = 0;
2148
2149 if (!led_supported) {
2150 len += sprintf(p + len, "status:\t\tnot supported\n");
2151 return len;
2152 }
2153 len += sprintf(p + len, "status:\t\tsupported\n");
2154
2155 if (led_supported == TPACPI_LED_570) {
2156 /* 570 */
2157 int i, status;
2158 for (i = 0; i < 8; i++) {
2159 if (!acpi_evalf(ec_handle,
2160 &status, "GLED", "dd", 1 << i))
2161 return -EIO;
2162 len += sprintf(p + len, "%d:\t\t%s\n",
2163 i, led_status(status));
2164 }
2165 }
2166
2167 len += sprintf(p + len, "commands:\t"
2168 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2169
2170 return len;
2171 }
2172
2173 /* off, on, blink */
2174 static const int led_sled_arg1[] = { 0, 1, 3 };
2175 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
2176 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
2177 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2178
2179 static int led_write(char *buf)
2180 {
2181 char *cmd;
2182 int led, ind, ret;
2183
2184 if (!led_supported)
2185 return -ENODEV;
2186
2187 while ((cmd = next_cmd(&buf))) {
2188 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2189 return -EINVAL;
2190
2191 if (strstr(cmd, "off")) {
2192 ind = 0;
2193 } else if (strstr(cmd, "on")) {
2194 ind = 1;
2195 } else if (strstr(cmd, "blink")) {
2196 ind = 2;
2197 } else
2198 return -EINVAL;
2199
2200 if (led_supported == TPACPI_LED_570) {
2201 /* 570 */
2202 led = 1 << led;
2203 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2204 led, led_sled_arg1[ind]))
2205 return -EIO;
2206 } else if (led_supported == TPACPI_LED_OLD) {
2207 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2208 led = 1 << led;
2209 ret = ec_write(TPACPI_LED_EC_HLMS, led);
2210 if (ret >= 0)
2211 ret =
2212 ec_write(TPACPI_LED_EC_HLBL,
2213 led * led_exp_hlbl[ind]);
2214 if (ret >= 0)
2215 ret =
2216 ec_write(TPACPI_LED_EC_HLCL,
2217 led * led_exp_hlcl[ind]);
2218 if (ret < 0)
2219 return ret;
2220 } else {
2221 /* all others */
2222 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2223 led, led_led_arg1[ind]))
2224 return -EIO;
2225 }
2226 }
2227
2228 return 0;
2229 }
2230
2231 static struct ibm_struct led_driver_data = {
2232 .name = "led",
2233 .read = led_read,
2234 .write = led_write,
2235 };
2236
2237 /*************************************************************************
2238 * Beep subdriver
2239 */
2240
2241 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
2242
2243 static int __init beep_init(struct ibm_init_struct *iibm)
2244 {
2245 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2246
2247 IBM_ACPIHANDLE_INIT(beep);
2248
2249 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2250 str_supported(beep_handle != NULL));
2251
2252 return (beep_handle)? 0 : 1;
2253 }
2254
2255 static int beep_read(char *p)
2256 {
2257 int len = 0;
2258
2259 if (!beep_handle)
2260 len += sprintf(p + len, "status:\t\tnot supported\n");
2261 else {
2262 len += sprintf(p + len, "status:\t\tsupported\n");
2263 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2264 }
2265
2266 return len;
2267 }
2268
2269 static int beep_write(char *buf)
2270 {
2271 char *cmd;
2272 int beep_cmd;
2273
2274 if (!beep_handle)
2275 return -ENODEV;
2276
2277 while ((cmd = next_cmd(&buf))) {
2278 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2279 beep_cmd >= 0 && beep_cmd <= 17) {
2280 /* beep_cmd set */
2281 } else
2282 return -EINVAL;
2283 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2284 return -EIO;
2285 }
2286
2287 return 0;
2288 }
2289
2290 static struct ibm_struct beep_driver_data = {
2291 .name = "beep",
2292 .read = beep_read,
2293 .write = beep_write,
2294 };
2295
2296 /*************************************************************************
2297 * Thermal subdriver
2298 */
2299
2300 static enum thermal_access_mode thermal_read_mode;
2301
2302 /* sysfs temp##_input -------------------------------------------------- */
2303
2304 static ssize_t thermal_temp_input_show(struct device *dev,
2305 struct device_attribute *attr,
2306 char *buf)
2307 {
2308 struct sensor_device_attribute *sensor_attr =
2309 to_sensor_dev_attr(attr);
2310 int idx = sensor_attr->index;
2311 s32 value;
2312 int res;
2313
2314 res = thermal_get_sensor(idx, &value);
2315 if (res)
2316 return res;
2317 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2318 return -ENXIO;
2319
2320 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2321 }
2322
2323 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2324 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2325
2326 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2327 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2328 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2329 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2330 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2331 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2332 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2333 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2334 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2335 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2336 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2337 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2338 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2339 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2340 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2341 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2342 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2343 };
2344
2345 #define THERMAL_ATTRS(X) \
2346 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2347
2348 static struct attribute *thermal_temp_input_attr[] = {
2349 THERMAL_ATTRS(8),
2350 THERMAL_ATTRS(9),
2351 THERMAL_ATTRS(10),
2352 THERMAL_ATTRS(11),
2353 THERMAL_ATTRS(12),
2354 THERMAL_ATTRS(13),
2355 THERMAL_ATTRS(14),
2356 THERMAL_ATTRS(15),
2357 THERMAL_ATTRS(0),
2358 THERMAL_ATTRS(1),
2359 THERMAL_ATTRS(2),
2360 THERMAL_ATTRS(3),
2361 THERMAL_ATTRS(4),
2362 THERMAL_ATTRS(5),
2363 THERMAL_ATTRS(6),
2364 THERMAL_ATTRS(7),
2365 NULL
2366 };
2367
2368 static const struct attribute_group thermal_temp_input16_group = {
2369 .attrs = thermal_temp_input_attr
2370 };
2371
2372 static const struct attribute_group thermal_temp_input8_group = {
2373 .attrs = &thermal_temp_input_attr[8]
2374 };
2375
2376 #undef THERMAL_SENSOR_ATTR_TEMP
2377 #undef THERMAL_ATTRS
2378
2379 /* --------------------------------------------------------------------- */
2380
2381 static int __init thermal_init(struct ibm_init_struct *iibm)
2382 {
2383 u8 t, ta1, ta2;
2384 int i;
2385 int acpi_tmp7;
2386 int res;
2387
2388 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2389
2390 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2391
2392 if (ibm_thinkpad_ec_found && experimental) {
2393 /*
2394 * Direct EC access mode: sensors at registers
2395 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2396 * non-implemented, thermal sensors return 0x80 when
2397 * not available
2398 */
2399
2400 ta1 = ta2 = 0;
2401 for (i = 0; i < 8; i++) {
2402 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2403 ta1 |= t;
2404 } else {
2405 ta1 = 0;
2406 break;
2407 }
2408 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2409 ta2 |= t;
2410 } else {
2411 ta1 = 0;
2412 break;
2413 }
2414 }
2415 if (ta1 == 0) {
2416 /* This is sheer paranoia, but we handle it anyway */
2417 if (acpi_tmp7) {
2418 printk(IBM_ERR
2419 "ThinkPad ACPI EC access misbehaving, "
2420 "falling back to ACPI TMPx access mode\n");
2421 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2422 } else {
2423 printk(IBM_ERR
2424 "ThinkPad ACPI EC access misbehaving, "
2425 "disabling thermal sensors access\n");
2426 thermal_read_mode = TPACPI_THERMAL_NONE;
2427 }
2428 } else {
2429 thermal_read_mode =
2430 (ta2 != 0) ?
2431 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2432 }
2433 } else if (acpi_tmp7) {
2434 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2435 /* 600e/x, 770e, 770x */
2436 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2437 } else {
2438 /* Standard ACPI TMPx access, max 8 sensors */
2439 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2440 }
2441 } else {
2442 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2443 thermal_read_mode = TPACPI_THERMAL_NONE;
2444 }
2445
2446 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2447 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2448 thermal_read_mode);
2449
2450 switch(thermal_read_mode) {
2451 case TPACPI_THERMAL_TPEC_16:
2452 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2453 &thermal_temp_input16_group);
2454 if (res)
2455 return res;
2456 break;
2457 case TPACPI_THERMAL_TPEC_8:
2458 case TPACPI_THERMAL_ACPI_TMP07:
2459 case TPACPI_THERMAL_ACPI_UPDT:
2460 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2461 &thermal_temp_input8_group);
2462 if (res)
2463 return res;
2464 break;
2465 case TPACPI_THERMAL_NONE:
2466 default:
2467 return 1;
2468 }
2469
2470 return 0;
2471 }
2472
2473 static void thermal_exit(void)
2474 {
2475 switch(thermal_read_mode) {
2476 case TPACPI_THERMAL_TPEC_16:
2477 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2478 &thermal_temp_input16_group);
2479 break;
2480 case TPACPI_THERMAL_TPEC_8:
2481 case TPACPI_THERMAL_ACPI_TMP07:
2482 case TPACPI_THERMAL_ACPI_UPDT:
2483 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2484 &thermal_temp_input16_group);
2485 break;
2486 case TPACPI_THERMAL_NONE:
2487 default:
2488 break;
2489 }
2490 }
2491
2492 /* idx is zero-based */
2493 static int thermal_get_sensor(int idx, s32 *value)
2494 {
2495 int t;
2496 s8 tmp;
2497 char tmpi[5];
2498
2499 t = TP_EC_THERMAL_TMP0;
2500
2501 switch (thermal_read_mode) {
2502 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2503 case TPACPI_THERMAL_TPEC_16:
2504 if (idx >= 8 && idx <= 15) {
2505 t = TP_EC_THERMAL_TMP8;
2506 idx -= 8;
2507 }
2508 /* fallthrough */
2509 #endif
2510 case TPACPI_THERMAL_TPEC_8:
2511 if (idx <= 7) {
2512 if (!acpi_ec_read(t + idx, &tmp))
2513 return -EIO;
2514 *value = tmp * 1000;
2515 return 0;
2516 }
2517 break;
2518
2519 case TPACPI_THERMAL_ACPI_UPDT:
2520 if (idx <= 7) {
2521 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2522 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2523 return -EIO;
2524 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2525 return -EIO;
2526 *value = (t - 2732) * 100;
2527 return 0;
2528 }
2529 break;
2530
2531 case TPACPI_THERMAL_ACPI_TMP07:
2532 if (idx <= 7) {
2533 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2534 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2535 return -EIO;
2536 *value = t * 1000;
2537 return 0;
2538 }
2539 break;
2540
2541 case TPACPI_THERMAL_NONE:
2542 default:
2543 return -ENOSYS;
2544 }
2545
2546 return -EINVAL;
2547 }
2548
2549 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2550 {
2551 int res, i;
2552 int n;
2553
2554 n = 8;
2555 i = 0;
2556
2557 if (!s)
2558 return -EINVAL;
2559
2560 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2561 n = 16;
2562
2563 for(i = 0 ; i < n; i++) {
2564 res = thermal_get_sensor(i, &s->temp[i]);
2565 if (res)
2566 return res;
2567 }
2568
2569 return n;
2570 }
2571
2572 static int thermal_read(char *p)
2573 {
2574 int len = 0;
2575 int n, i;
2576 struct ibm_thermal_sensors_struct t;
2577
2578 n = thermal_get_sensors(&t);
2579 if (unlikely(n < 0))
2580 return n;
2581
2582 len += sprintf(p + len, "temperatures:\t");
2583
2584 if (n > 0) {
2585 for (i = 0; i < (n - 1); i++)
2586 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2587 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2588 } else
2589 len += sprintf(p + len, "not supported\n");
2590
2591 return len;
2592 }
2593
2594 static struct ibm_struct thermal_driver_data = {
2595 .name = "thermal",
2596 .read = thermal_read,
2597 .exit = thermal_exit,
2598 };
2599
2600 /*************************************************************************
2601 * EC Dump subdriver
2602 */
2603
2604 static u8 ecdump_regs[256];
2605
2606 static int ecdump_read(char *p)
2607 {
2608 int len = 0;
2609 int i, j;
2610 u8 v;
2611
2612 len += sprintf(p + len, "EC "
2613 " +00 +01 +02 +03 +04 +05 +06 +07"
2614 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2615 for (i = 0; i < 256; i += 16) {
2616 len += sprintf(p + len, "EC 0x%02x:", i);
2617 for (j = 0; j < 16; j++) {
2618 if (!acpi_ec_read(i + j, &v))
2619 break;
2620 if (v != ecdump_regs[i + j])
2621 len += sprintf(p + len, " *%02x", v);
2622 else
2623 len += sprintf(p + len, " %02x", v);
2624 ecdump_regs[i + j] = v;
2625 }
2626 len += sprintf(p + len, "\n");
2627 if (j != 16)
2628 break;
2629 }
2630
2631 /* These are way too dangerous to advertise openly... */
2632 #if 0
2633 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2634 " (<offset> is 00-ff, <value> is 00-ff)\n");
2635 len += sprintf(p + len, "commands:\t0x<offset> <value> "
2636 " (<offset> is 00-ff, <value> is 0-255)\n");
2637 #endif
2638 return len;
2639 }
2640
2641 static int ecdump_write(char *buf)
2642 {
2643 char *cmd;
2644 int i, v;
2645
2646 while ((cmd = next_cmd(&buf))) {
2647 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2648 /* i and v set */
2649 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2650 /* i and v set */
2651 } else
2652 return -EINVAL;
2653 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2654 if (!acpi_ec_write(i, v))
2655 return -EIO;
2656 } else
2657 return -EINVAL;
2658 }
2659
2660 return 0;
2661 }
2662
2663 static struct ibm_struct ecdump_driver_data = {
2664 .name = "ecdump",
2665 .read = ecdump_read,
2666 .write = ecdump_write,
2667 .flags.experimental = 1,
2668 };
2669
2670 /*************************************************************************
2671 * Backlight/brightness subdriver
2672 */
2673
2674 static struct backlight_device *ibm_backlight_device = NULL;
2675
2676 static struct backlight_ops ibm_backlight_data = {
2677 .get_brightness = brightness_get,
2678 .update_status = brightness_update_status,
2679 };
2680
2681 static int __init brightness_init(struct ibm_init_struct *iibm)
2682 {
2683 int b;
2684
2685 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2686
2687 b = brightness_get(NULL);
2688 if (b < 0)
2689 return b;
2690
2691 ibm_backlight_device = backlight_device_register(
2692 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2693 &ibm_backlight_data);
2694 if (IS_ERR(ibm_backlight_device)) {
2695 printk(IBM_ERR "Could not register backlight device\n");
2696 return PTR_ERR(ibm_backlight_device);
2697 }
2698 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2699
2700 ibm_backlight_device->props.max_brightness = 7;
2701 ibm_backlight_device->props.brightness = b;
2702 backlight_update_status(ibm_backlight_device);
2703
2704 return 0;
2705 }
2706
2707 static void brightness_exit(void)
2708 {
2709 if (ibm_backlight_device) {
2710 vdbg_printk(TPACPI_DBG_EXIT,
2711 "calling backlight_device_unregister()\n");
2712 backlight_device_unregister(ibm_backlight_device);
2713 ibm_backlight_device = NULL;
2714 }
2715 }
2716
2717 static int brightness_update_status(struct backlight_device *bd)
2718 {
2719 return brightness_set(
2720 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2721 bd->props.power == FB_BLANK_UNBLANK) ?
2722 bd->props.brightness : 0);
2723 }
2724
2725 static int brightness_get(struct backlight_device *bd)
2726 {
2727 u8 level;
2728 if (!acpi_ec_read(brightness_offset, &level))
2729 return -EIO;
2730
2731 level &= 0x7;
2732
2733 return level;
2734 }
2735
2736 static int brightness_set(int value)
2737 {
2738 int cmos_cmd, inc, i;
2739 int current_value = brightness_get(NULL);
2740
2741 value &= 7;
2742
2743 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2744 inc = value > current_value ? 1 : -1;
2745 for (i = current_value; i != value; i += inc) {
2746 if (issue_thinkpad_cmos_command(cmos_cmd))
2747 return -EIO;
2748 if (!acpi_ec_write(brightness_offset, i + inc))
2749 return -EIO;
2750 }
2751
2752 return 0;
2753 }
2754
2755 static int brightness_read(char *p)
2756 {
2757 int len = 0;
2758 int level;
2759
2760 if ((level = brightness_get(NULL)) < 0) {
2761 len += sprintf(p + len, "level:\t\tunreadable\n");
2762 } else {
2763 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2764 len += sprintf(p + len, "commands:\tup, down\n");
2765 len += sprintf(p + len, "commands:\tlevel <level>"
2766 " (<level> is 0-7)\n");
2767 }
2768
2769 return len;
2770 }
2771
2772 static int brightness_write(char *buf)
2773 {
2774 int level;
2775 int new_level;
2776 char *cmd;
2777
2778 while ((cmd = next_cmd(&buf))) {
2779 if ((level = brightness_get(NULL)) < 0)
2780 return level;
2781 level &= 7;
2782
2783 if (strlencmp(cmd, "up") == 0) {
2784 new_level = level == 7 ? 7 : level + 1;
2785 } else if (strlencmp(cmd, "down") == 0) {
2786 new_level = level == 0 ? 0 : level - 1;
2787 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2788 new_level >= 0 && new_level <= 7) {
2789 /* new_level set */
2790 } else
2791 return -EINVAL;
2792
2793 brightness_set(new_level);
2794 }
2795
2796 return 0;
2797 }
2798
2799 static struct ibm_struct brightness_driver_data = {
2800 .name = "brightness",
2801 .read = brightness_read,
2802 .write = brightness_write,
2803 .exit = brightness_exit,
2804 };
2805
2806 /*************************************************************************
2807 * Volume subdriver
2808 */
2809
2810 static int volume_read(char *p)
2811 {
2812 int len = 0;
2813 u8 level;
2814
2815 if (!acpi_ec_read(volume_offset, &level)) {
2816 len += sprintf(p + len, "level:\t\tunreadable\n");
2817 } else {
2818 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2819 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2820 len += sprintf(p + len, "commands:\tup, down, mute\n");
2821 len += sprintf(p + len, "commands:\tlevel <level>"
2822 " (<level> is 0-15)\n");
2823 }
2824
2825 return len;
2826 }
2827
2828 static int volume_write(char *buf)
2829 {
2830 int cmos_cmd, inc, i;
2831 u8 level, mute;
2832 int new_level, new_mute;
2833 char *cmd;
2834
2835 while ((cmd = next_cmd(&buf))) {
2836 if (!acpi_ec_read(volume_offset, &level))
2837 return -EIO;
2838 new_mute = mute = level & 0x40;
2839 new_level = level = level & 0xf;
2840
2841 if (strlencmp(cmd, "up") == 0) {
2842 if (mute)
2843 new_mute = 0;
2844 else
2845 new_level = level == 15 ? 15 : level + 1;
2846 } else if (strlencmp(cmd, "down") == 0) {
2847 if (mute)
2848 new_mute = 0;
2849 else
2850 new_level = level == 0 ? 0 : level - 1;
2851 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2852 new_level >= 0 && new_level <= 15) {
2853 /* new_level set */
2854 } else if (strlencmp(cmd, "mute") == 0) {
2855 new_mute = 0x40;
2856 } else
2857 return -EINVAL;
2858
2859 if (new_level != level) { /* mute doesn't change */
2860 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2861 inc = new_level > level ? 1 : -1;
2862
2863 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2864 !acpi_ec_write(volume_offset, level)))
2865 return -EIO;
2866
2867 for (i = level; i != new_level; i += inc)
2868 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2869 !acpi_ec_write(volume_offset, i + inc))
2870 return -EIO;
2871
2872 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2873 !acpi_ec_write(volume_offset,
2874 new_level + mute)))
2875 return -EIO;
2876 }
2877
2878 if (new_mute != mute) { /* level doesn't change */
2879 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2880
2881 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2882 !acpi_ec_write(volume_offset, level + new_mute))
2883 return -EIO;
2884 }
2885 }
2886
2887 return 0;
2888 }
2889
2890 static struct ibm_struct volume_driver_data = {
2891 .name = "volume",
2892 .read = volume_read,
2893 .write = volume_write,
2894 };
2895
2896 /*************************************************************************
2897 * Fan subdriver
2898 */
2899
2900 /*
2901 * FAN ACCESS MODES
2902 *
2903 * TPACPI_FAN_RD_ACPI_GFAN:
2904 * ACPI GFAN method: returns fan level
2905 *
2906 * see TPACPI_FAN_WR_ACPI_SFAN
2907 * EC 0x2f (HFSP) not available if GFAN exists
2908 *
2909 * TPACPI_FAN_WR_ACPI_SFAN:
2910 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2911 *
2912 * EC 0x2f (HFSP) might be available *for reading*, but do not use
2913 * it for writing.
2914 *
2915 * TPACPI_FAN_WR_TPEC:
2916 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
2917 * Supported on almost all ThinkPads
2918 *
2919 * Fan speed changes of any sort (including those caused by the
2920 * disengaged mode) are usually done slowly by the firmware as the
2921 * maximum ammount of fan duty cycle change per second seems to be
2922 * limited.
2923 *
2924 * Reading is not available if GFAN exists.
2925 * Writing is not available if SFAN exists.
2926 *
2927 * Bits
2928 * 7 automatic mode engaged;
2929 * (default operation mode of the ThinkPad)
2930 * fan level is ignored in this mode.
2931 * 6 full speed mode (takes precedence over bit 7);
2932 * not available on all thinkpads. May disable
2933 * the tachometer while the fan controller ramps up
2934 * the speed (which can take up to a few *minutes*).
2935 * Speeds up fan to 100% duty-cycle, which is far above
2936 * the standard RPM levels. It is not impossible that
2937 * it could cause hardware damage.
2938 * 5-3 unused in some models. Extra bits for fan level
2939 * in others, but still useless as all values above
2940 * 7 map to the same speed as level 7 in these models.
2941 * 2-0 fan level (0..7 usually)
2942 * 0x00 = stop
2943 * 0x07 = max (set when temperatures critical)
2944 * Some ThinkPads may have other levels, see
2945 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2946 *
2947 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2948 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2949 * does so, its initial value is meaningless (0x07).
2950 *
2951 * For firmware bugs, refer to:
2952 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2953 *
2954 * ----
2955 *
2956 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2957 * Main fan tachometer reading (in RPM)
2958 *
2959 * This register is present on all ThinkPads with a new-style EC, and
2960 * it is known not to be present on the A21m/e, and T22, as there is
2961 * something else in offset 0x84 according to the ACPI DSDT. Other
2962 * ThinkPads from this same time period (and earlier) probably lack the
2963 * tachometer as well.
2964 *
2965 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2966 * was never fixed by IBM to report the EC firmware version string
2967 * probably support the tachometer (like the early X models), so
2968 * detecting it is quite hard. We need more data to know for sure.
2969 *
2970 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2971 * might result.
2972 *
2973 * FIRMWARE BUG: may go stale while the EC is switching to full speed
2974 * mode.
2975 *
2976 * For firmware bugs, refer to:
2977 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2978 *
2979 * TPACPI_FAN_WR_ACPI_FANS:
2980 * ThinkPad X31, X40, X41. Not available in the X60.
2981 *
2982 * FANS ACPI handle: takes three arguments: low speed, medium speed,
2983 * high speed. ACPI DSDT seems to map these three speeds to levels
2984 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2985 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2986 *
2987 * The speeds are stored on handles
2988 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2989 *
2990 * There are three default speed sets, acessible as handles:
2991 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2992 *
2993 * ACPI DSDT switches which set is in use depending on various
2994 * factors.
2995 *
2996 * TPACPI_FAN_WR_TPEC is also available and should be used to
2997 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
2998 * but the ACPI tables just mention level 7.
2999 */
3000
3001 static enum fan_status_access_mode fan_status_access_mode;
3002 static enum fan_control_access_mode fan_control_access_mode;
3003 static enum fan_control_commands fan_control_commands;
3004
3005 static u8 fan_control_initial_status;
3006 static u8 fan_control_desired_level;
3007
3008 static void fan_watchdog_fire(struct work_struct *ignored);
3009 static int fan_watchdog_maxinterval;
3010 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3011
3012 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
3013 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
3014 "\\FSPD", /* 600e/x, 770e, 770x */
3015 ); /* all others */
3016 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
3017 "JFNS", /* 770x-JL */
3018 ); /* all others */
3019
3020 /*
3021 * SYSFS fan layout: hwmon compatible (device)
3022 *
3023 * pwm*_enable:
3024 * 0: "disengaged" mode
3025 * 1: manual mode
3026 * 2: native EC "auto" mode (recommended, hardware default)
3027 *
3028 * pwm*: set speed in manual mode, ignored otherwise.
3029 * 0 is level 0; 255 is level 7. Intermediate points done with linear
3030 * interpolation.
3031 *
3032 * fan*_input: tachometer reading, RPM
3033 *
3034 *
3035 * SYSFS fan layout: extensions
3036 *
3037 * fan_watchdog (driver):
3038 * fan watchdog interval in seconds, 0 disables (default), max 120
3039 */
3040
3041 /* sysfs fan pwm1_enable ----------------------------------------------- */
3042 static ssize_t fan_pwm1_enable_show(struct device *dev,
3043 struct device_attribute *attr,
3044 char *buf)
3045 {
3046 int res, mode;
3047 u8 status;
3048
3049 res = fan_get_status_safe(&status);
3050 if (res)
3051 return res;
3052
3053 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3054 if (status != fan_control_initial_status) {
3055 tp_features.fan_ctrl_status_undef = 0;
3056 } else {
3057 /* Return most likely status. In fact, it
3058 * might be the only possible status */
3059 status = TP_EC_FAN_AUTO;
3060 }
3061 }
3062
3063 if (status & TP_EC_FAN_FULLSPEED) {
3064 mode = 0;
3065 } else if (status & TP_EC_FAN_AUTO) {
3066 mode = 2;
3067 } else
3068 mode = 1;
3069
3070 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3071 }
3072
3073 static ssize_t fan_pwm1_enable_store(struct device *dev,
3074 struct device_attribute *attr,
3075 const char *buf, size_t count)
3076 {
3077 unsigned long t;
3078 int res, level;
3079
3080 if (parse_strtoul(buf, 2, &t))
3081 return -EINVAL;
3082
3083 switch (t) {
3084 case 0:
3085 level = TP_EC_FAN_FULLSPEED;
3086 break;
3087 case 1:
3088 level = TPACPI_FAN_LAST_LEVEL;
3089 break;
3090 case 2:
3091 level = TP_EC_FAN_AUTO;
3092 break;
3093 case 3:
3094 /* reserved for software-controlled auto mode */
3095 return -ENOSYS;
3096 default:
3097 return -EINVAL;
3098 }
3099
3100 res = fan_set_level_safe(level);
3101 if (res == -ENXIO)
3102 return -EINVAL;
3103 else if (res < 0)
3104 return res;
3105
3106 fan_watchdog_reset();
3107
3108 return count;
3109 }
3110
3111 static struct device_attribute dev_attr_fan_pwm1_enable =
3112 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3113 fan_pwm1_enable_show, fan_pwm1_enable_store);
3114
3115 /* sysfs fan pwm1 ------------------------------------------------------ */
3116 static ssize_t fan_pwm1_show(struct device *dev,
3117 struct device_attribute *attr,
3118 char *buf)
3119 {
3120 int res;
3121 u8 status;
3122
3123 res = fan_get_status_safe(&status);
3124 if (res)
3125 return res;
3126
3127 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3128 if (status != fan_control_initial_status) {
3129 tp_features.fan_ctrl_status_undef = 0;
3130 } else {
3131 status = TP_EC_FAN_AUTO;
3132 }
3133 }
3134
3135 if ((status &
3136 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3137 status = fan_control_desired_level;
3138
3139 if (status > 7)
3140 status = 7;
3141
3142 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3143 }
3144
3145 static ssize_t fan_pwm1_store(struct device *dev,
3146 struct device_attribute *attr,
3147 const char *buf, size_t count)
3148 {
3149 unsigned long s;
3150 int rc;
3151 u8 status, newlevel;
3152
3153 if (parse_strtoul(buf, 255, &s))
3154 return -EINVAL;
3155
3156 /* scale down from 0-255 to 0-7 */
3157 newlevel = (s >> 5) & 0x07;
3158
3159 rc = mutex_lock_interruptible(&fan_mutex);
3160 if (rc < 0)
3161 return rc;
3162
3163 rc = fan_get_status(&status);
3164 if (!rc && (status &
3165 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3166 rc = fan_set_level(newlevel);
3167 if (rc == -ENXIO)
3168 rc = -EINVAL;
3169 else if (!rc) {
3170 fan_update_desired_level(newlevel);
3171 fan_watchdog_reset();
3172 }
3173 }
3174
3175 mutex_unlock(&fan_mutex);
3176 return (rc)? rc : count;
3177 }
3178
3179 static struct device_attribute dev_attr_fan_pwm1 =
3180 __ATTR(pwm1, S_IWUSR | S_IRUGO,
3181 fan_pwm1_show, fan_pwm1_store);
3182
3183 /* sysfs fan fan1_input ------------------------------------------------ */
3184 static ssize_t fan_fan1_input_show(struct device *dev,
3185 struct device_attribute *attr,
3186 char *buf)
3187 {
3188 int res;
3189 unsigned int speed;
3190
3191 res = fan_get_speed(&speed);
3192 if (res < 0)
3193 return res;
3194
3195 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3196 }
3197
3198 static struct device_attribute dev_attr_fan_fan1_input =
3199 __ATTR(fan1_input, S_IRUGO,
3200 fan_fan1_input_show, NULL);
3201
3202 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3203 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3204 char *buf)
3205 {
3206 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3207 }
3208
3209 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3210 const char *buf, size_t count)
3211 {
3212 unsigned long t;
3213
3214 if (parse_strtoul(buf, 120, &t))
3215 return -EINVAL;
3216
3217 if (!fan_control_allowed)
3218 return -EPERM;
3219
3220 fan_watchdog_maxinterval = t;
3221 fan_watchdog_reset();
3222
3223 return count;
3224 }
3225
3226 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3227 fan_fan_watchdog_show, fan_fan_watchdog_store);
3228
3229 /* --------------------------------------------------------------------- */
3230 static struct attribute *fan_attributes[] = {
3231 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3232 &dev_attr_fan_fan1_input.attr,
3233 NULL
3234 };
3235
3236 static const struct attribute_group fan_attr_group = {
3237 .attrs = fan_attributes,
3238 };
3239
3240 static int __init fan_init(struct ibm_init_struct *iibm)
3241 {
3242 int rc;
3243
3244 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3245
3246 mutex_init(&fan_mutex);
3247 fan_status_access_mode = TPACPI_FAN_NONE;
3248 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3249 fan_control_commands = 0;
3250 fan_watchdog_maxinterval = 0;
3251 tp_features.fan_ctrl_status_undef = 0;
3252 fan_control_desired_level = 7;
3253
3254 IBM_ACPIHANDLE_INIT(fans);
3255 IBM_ACPIHANDLE_INIT(gfan);
3256 IBM_ACPIHANDLE_INIT(sfan);
3257
3258 if (gfan_handle) {
3259 /* 570, 600e/x, 770e, 770x */
3260 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3261 } else {
3262 /* all other ThinkPads: note that even old-style
3263 * ThinkPad ECs supports the fan control register */
3264 if (likely(acpi_ec_read(fan_status_offset,
3265 &fan_control_initial_status))) {
3266 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3267
3268 /* In some ThinkPads, neither the EC nor the ACPI
3269 * DSDT initialize the fan status, and it ends up
3270 * being set to 0x07 when it *could* be either
3271 * 0x07 or 0x80.
3272 *
3273 * Enable for TP-1Y (T43), TP-78 (R51e),
3274 * TP-76 (R52), TP-70 (T43, R52), which are known
3275 * to be buggy. */
3276 if (fan_control_initial_status == 0x07 &&
3277 ibm_thinkpad_ec_found &&
3278 ((ibm_thinkpad_ec_found[0] == '1' &&
3279 ibm_thinkpad_ec_found[1] == 'Y') ||
3280 (ibm_thinkpad_ec_found[0] == '7' &&
3281 (ibm_thinkpad_ec_found[1] == '6' ||
3282 ibm_thinkpad_ec_found[1] == '8' ||
3283 ibm_thinkpad_ec_found[1] == '0'))
3284 )) {
3285 printk(IBM_NOTICE
3286 "fan_init: initial fan status is "
3287 "unknown, assuming it is in auto "
3288 "mode\n");
3289 tp_features.fan_ctrl_status_undef = 1;
3290 }
3291 } else {
3292 printk(IBM_ERR
3293 "ThinkPad ACPI EC access misbehaving, "
3294 "fan status and control unavailable\n");
3295 return 1;
3296 }
3297 }
3298
3299 if (sfan_handle) {
3300 /* 570, 770x-JL */
3301 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3302 fan_control_commands |=
3303 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3304 } else {
3305 if (!gfan_handle) {
3306 /* gfan without sfan means no fan control */
3307 /* all other models implement TP EC 0x2f control */
3308
3309 if (fans_handle) {
3310 /* X31, X40, X41 */
3311 fan_control_access_mode =
3312 TPACPI_FAN_WR_ACPI_FANS;
3313 fan_control_commands |=
3314 TPACPI_FAN_CMD_SPEED |
3315 TPACPI_FAN_CMD_LEVEL |
3316 TPACPI_FAN_CMD_ENABLE;
3317 } else {
3318 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3319 fan_control_commands |=
3320 TPACPI_FAN_CMD_LEVEL |
3321 TPACPI_FAN_CMD_ENABLE;
3322 }
3323 }
3324 }
3325
3326 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3327 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3328 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3329 fan_status_access_mode, fan_control_access_mode);
3330
3331 /* fan control master switch */
3332 if (!fan_control_allowed) {
3333 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3334 fan_control_commands = 0;
3335 dbg_printk(TPACPI_DBG_INIT,
3336 "fan control features disabled by parameter\n");
3337 }
3338
3339 /* update fan_control_desired_level */
3340 if (fan_status_access_mode != TPACPI_FAN_NONE)
3341 fan_get_status_safe(NULL);
3342
3343 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3344 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3345 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3346 &fan_attr_group);
3347 if (!(rc < 0))
3348 rc = driver_create_file(&tpacpi_pdriver.driver,
3349 &driver_attr_fan_watchdog);
3350 if (rc < 0)
3351 return rc;
3352 return 0;
3353 } else
3354 return 1;
3355 }
3356
3357 /*
3358 * Call with fan_mutex held
3359 */
3360 static void fan_update_desired_level(u8 status)
3361 {
3362 if ((status &
3363 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3364 if (status > 7)
3365 fan_control_desired_level = 7;
3366 else
3367 fan_control_desired_level = status;
3368 }
3369 }
3370
3371 static int fan_get_status(u8 *status)
3372 {
3373 u8 s;
3374
3375 /* TODO:
3376 * Add TPACPI_FAN_RD_ACPI_FANS ? */
3377
3378 switch (fan_status_access_mode) {
3379 case TPACPI_FAN_RD_ACPI_GFAN:
3380 /* 570, 600e/x, 770e, 770x */
3381
3382 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3383 return -EIO;
3384
3385 if (likely(status))
3386 *status = s & 0x07;
3387
3388 break;
3389
3390 case TPACPI_FAN_RD_TPEC:
3391 /* all except 570, 600e/x, 770e, 770x */
3392 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3393 return -EIO;
3394
3395 if (likely(status))
3396 *status = s;
3397
3398 break;
3399
3400 default:
3401 return -ENXIO;
3402 }
3403
3404 return 0;
3405 }
3406
3407 static int fan_get_status_safe(u8 *status)
3408 {
3409 int rc;
3410 u8 s;
3411
3412 rc = mutex_lock_interruptible(&fan_mutex);
3413 if (rc < 0)
3414 return rc;
3415 rc = fan_get_status(&s);
3416 if (!rc)
3417 fan_update_desired_level(s);
3418 mutex_unlock(&fan_mutex);
3419
3420 if (status)
3421 *status = s;
3422
3423 return rc;
3424 }
3425
3426 static void fan_exit(void)
3427 {
3428 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3429
3430 /* FIXME: can we really do this unconditionally? */
3431 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3432 driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3433
3434 cancel_delayed_work(&fan_watchdog_task);
3435 flush_scheduled_work();
3436 }
3437
3438 static int fan_get_speed(unsigned int *speed)
3439 {
3440 u8 hi, lo;
3441
3442 switch (fan_status_access_mode) {
3443 case TPACPI_FAN_RD_TPEC:
3444 /* all except 570, 600e/x, 770e, 770x */
3445 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3446 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3447 return -EIO;
3448
3449 if (likely(speed))
3450 *speed = (hi << 8) | lo;
3451
3452 break;
3453
3454 default:
3455 return -ENXIO;
3456 }
3457
3458 return 0;
3459 }
3460
3461 static void fan_watchdog_fire(struct work_struct *ignored)
3462 {
3463 int rc;
3464
3465 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3466 rc = fan_set_enable();
3467 if (rc < 0) {
3468 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3469 "will try again later...\n", -rc);
3470 /* reschedule for later */
3471 fan_watchdog_reset();
3472 }
3473 }
3474
3475 static void fan_watchdog_reset(void)
3476 {
3477 static int fan_watchdog_active = 0;
3478
3479 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3480 return;
3481
3482 if (fan_watchdog_active)
3483 cancel_delayed_work(&fan_watchdog_task);
3484
3485 if (fan_watchdog_maxinterval > 0) {
3486 fan_watchdog_active = 1;
3487 if (!schedule_delayed_work(&fan_watchdog_task,
3488 msecs_to_jiffies(fan_watchdog_maxinterval
3489 * 1000))) {
3490 printk(IBM_ERR "failed to schedule the fan watchdog, "
3491 "watchdog will not trigger\n");
3492 }
3493 } else
3494 fan_watchdog_active = 0;
3495 }
3496
3497 static int fan_set_level(int level)
3498 {
3499 if (!fan_control_allowed)
3500 return -EPERM;
3501
3502 switch (fan_control_access_mode) {
3503 case TPACPI_FAN_WR_ACPI_SFAN:
3504 if (level >= 0 && level <= 7) {
3505 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3506 return -EIO;
3507 } else
3508 return -EINVAL;
3509 break;
3510
3511 case TPACPI_FAN_WR_ACPI_FANS:
3512 case TPACPI_FAN_WR_TPEC:
3513 if ((level != TP_EC_FAN_AUTO) &&
3514 (level != TP_EC_FAN_FULLSPEED) &&
3515 ((level < 0) || (level > 7)))
3516 return -EINVAL;
3517
3518 /* safety net should the EC not support AUTO
3519 * or FULLSPEED mode bits and just ignore them */
3520 if (level & TP_EC_FAN_FULLSPEED)
3521 level |= 7; /* safety min speed 7 */
3522 else if (level & TP_EC_FAN_FULLSPEED)
3523 level |= 4; /* safety min speed 4 */
3524
3525 if (!acpi_ec_write(fan_status_offset, level))
3526 return -EIO;
3527 else
3528 tp_features.fan_ctrl_status_undef = 0;
3529 break;
3530
3531 default:
3532 return -ENXIO;
3533 }
3534 return 0;
3535 }
3536
3537 static int fan_set_level_safe(int level)
3538 {
3539 int rc;
3540
3541 if (!fan_control_allowed)
3542 return -EPERM;
3543
3544 rc = mutex_lock_interruptible(&fan_mutex);
3545 if (rc < 0)
3546 return rc;
3547
3548 if (level == TPACPI_FAN_LAST_LEVEL)
3549 level = fan_control_desired_level;
3550
3551 rc = fan_set_level(level);
3552 if (!rc)
3553 fan_update_desired_level(level);
3554
3555 mutex_unlock(&fan_mutex);
3556 return rc;
3557 }
3558
3559 static int fan_set_enable(void)
3560 {
3561 u8 s;
3562 int rc;
3563
3564 if (!fan_control_allowed)
3565 return -EPERM;
3566
3567 rc = mutex_lock_interruptible(&fan_mutex);
3568 if (rc < 0)
3569 return rc;
3570
3571 switch (fan_control_access_mode) {
3572 case TPACPI_FAN_WR_ACPI_FANS:
3573 case TPACPI_FAN_WR_TPEC:
3574 rc = fan_get_status(&s);
3575 if (rc < 0)
3576 break;
3577
3578 /* Don't go out of emergency fan mode */
3579 if (s != 7) {
3580 s &= 0x07;
3581 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3582 }
3583
3584 if (!acpi_ec_write(fan_status_offset, s))
3585 rc = -EIO;
3586 else {
3587 tp_features.fan_ctrl_status_undef = 0;
3588 rc = 0;
3589 }
3590 break;
3591
3592 case TPACPI_FAN_WR_ACPI_SFAN:
3593 rc = fan_get_status(&s);
3594 if (rc < 0)
3595 break;
3596
3597 s &= 0x07;
3598
3599 /* Set fan to at least level 4 */
3600 s |= 4;
3601
3602 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3603 rc= -EIO;
3604 else
3605 rc = 0;
3606 break;
3607
3608 default:
3609 rc = -ENXIO;
3610 }
3611
3612 mutex_unlock(&fan_mutex);
3613 return rc;
3614 }
3615
3616 static int fan_set_disable(void)
3617 {
3618 int rc;
3619
3620 if (!fan_control_allowed)
3621 return -EPERM;
3622
3623 rc = mutex_lock_interruptible(&fan_mutex);
3624 if (rc < 0)
3625 return rc;
3626
3627 rc = 0;
3628 switch (fan_control_access_mode) {
3629 case TPACPI_FAN_WR_ACPI_FANS:
3630 case TPACPI_FAN_WR_TPEC:
3631 if (!acpi_ec_write(fan_status_offset, 0x00))
3632 rc = -EIO;
3633 else {
3634 fan_control_desired_level = 0;
3635 tp_features.fan_ctrl_status_undef = 0;
3636 }
3637 break;
3638
3639 case TPACPI_FAN_WR_ACPI_SFAN:
3640 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
3641 rc = -EIO;
3642 else
3643 fan_control_desired_level = 0;
3644 break;
3645
3646 default:
3647 rc = -ENXIO;
3648 }
3649
3650
3651 mutex_unlock(&fan_mutex);
3652 return rc;
3653 }
3654
3655 static int fan_set_speed(int speed)
3656 {
3657 int rc;
3658
3659 if (!fan_control_allowed)
3660 return -EPERM;
3661
3662 rc = mutex_lock_interruptible(&fan_mutex);
3663 if (rc < 0)
3664 return rc;
3665
3666 rc = 0;
3667 switch (fan_control_access_mode) {
3668 case TPACPI_FAN_WR_ACPI_FANS:
3669 if (speed >= 0 && speed <= 65535) {
3670 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3671 speed, speed, speed))
3672 rc = -EIO;
3673 } else
3674 rc = -EINVAL;
3675 break;
3676
3677 default:
3678 rc = -ENXIO;
3679 }
3680
3681 mutex_unlock(&fan_mutex);
3682 return rc;
3683 }
3684
3685 static int fan_read(char *p)
3686 {
3687 int len = 0;
3688 int rc;
3689 u8 status;
3690 unsigned int speed = 0;
3691
3692 switch (fan_status_access_mode) {
3693 case TPACPI_FAN_RD_ACPI_GFAN:
3694 /* 570, 600e/x, 770e, 770x */
3695 if ((rc = fan_get_status_safe(&status)) < 0)
3696 return rc;
3697
3698 len += sprintf(p + len, "status:\t\t%s\n"
3699 "level:\t\t%d\n",
3700 (status != 0) ? "enabled" : "disabled", status);
3701 break;
3702
3703 case TPACPI_FAN_RD_TPEC:
3704 /* all except 570, 600e/x, 770e, 770x */
3705 if ((rc = fan_get_status_safe(&status)) < 0)
3706 return rc;
3707
3708 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3709 if (status != fan_control_initial_status)
3710 tp_features.fan_ctrl_status_undef = 0;
3711 else
3712 /* Return most likely status. In fact, it
3713 * might be the only possible status */
3714 status = TP_EC_FAN_AUTO;
3715 }
3716
3717 len += sprintf(p + len, "status:\t\t%s\n",
3718 (status != 0) ? "enabled" : "disabled");
3719
3720 if ((rc = fan_get_speed(&speed)) < 0)
3721 return rc;
3722
3723 len += sprintf(p + len, "speed:\t\t%d\n", speed);
3724
3725 if (status & TP_EC_FAN_FULLSPEED)
3726 /* Disengaged mode takes precedence */
3727 len += sprintf(p + len, "level:\t\tdisengaged\n");
3728 else if (status & TP_EC_FAN_AUTO)
3729 len += sprintf(p + len, "level:\t\tauto\n");
3730 else
3731 len += sprintf(p + len, "level:\t\t%d\n", status);
3732 break;
3733
3734 case TPACPI_FAN_NONE:
3735 default:
3736 len += sprintf(p + len, "status:\t\tnot supported\n");
3737 }
3738
3739 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
3740 len += sprintf(p + len, "commands:\tlevel <level>");
3741
3742 switch (fan_control_access_mode) {
3743 case TPACPI_FAN_WR_ACPI_SFAN:
3744 len += sprintf(p + len, " (<level> is 0-7)\n");
3745 break;
3746
3747 default:
3748 len += sprintf(p + len, " (<level> is 0-7, "
3749 "auto, disengaged, full-speed)\n");
3750 break;
3751 }
3752 }
3753
3754 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
3755 len += sprintf(p + len, "commands:\tenable, disable\n"
3756 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
3757 "1-120 (seconds))\n");
3758
3759 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
3760 len += sprintf(p + len, "commands:\tspeed <speed>"
3761 " (<speed> is 0-65535)\n");
3762
3763 return len;
3764 }
3765
3766 static int fan_write_cmd_level(const char *cmd, int *rc)
3767 {
3768 int level;
3769
3770 if (strlencmp(cmd, "level auto") == 0)
3771 level = TP_EC_FAN_AUTO;
3772 else if ((strlencmp(cmd, "level disengaged") == 0) |
3773 (strlencmp(cmd, "level full-speed") == 0))
3774 level = TP_EC_FAN_FULLSPEED;
3775 else if (sscanf(cmd, "level %d", &level) != 1)
3776 return 0;
3777
3778 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
3779 printk(IBM_ERR "level command accepted for unsupported "
3780 "access mode %d", fan_control_access_mode);
3781
3782 return 1;
3783 }
3784
3785 static int fan_write_cmd_enable(const char *cmd, int *rc)
3786 {
3787 if (strlencmp(cmd, "enable") != 0)
3788 return 0;
3789
3790 if ((*rc = fan_set_enable()) == -ENXIO)
3791 printk(IBM_ERR "enable command accepted for unsupported "
3792 "access mode %d", fan_control_access_mode);
3793
3794 return 1;
3795 }
3796
3797 static int fan_write_cmd_disable(const char *cmd, int *rc)
3798 {
3799 if (strlencmp(cmd, "disable") != 0)
3800 return 0;
3801
3802 if ((*rc = fan_set_disable()) == -ENXIO)
3803 printk(IBM_ERR "disable command accepted for unsupported "
3804 "access mode %d", fan_control_access_mode);
3805
3806 return 1;
3807 }
3808
3809 static int fan_write_cmd_speed(const char *cmd, int *rc)
3810 {
3811 int speed;
3812
3813 /* TODO:
3814 * Support speed <low> <medium> <high> ? */
3815
3816 if (sscanf(cmd, "speed %d", &speed) != 1)
3817 return 0;
3818
3819 if ((*rc = fan_set_speed(speed)) == -ENXIO)
3820 printk(IBM_ERR "speed command accepted for unsupported "
3821 "access mode %d", fan_control_access_mode);
3822
3823 return 1;
3824 }
3825
3826 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
3827 {
3828 int interval;
3829
3830 if (sscanf(cmd, "watchdog %d", &interval) != 1)
3831 return 0;
3832
3833 if (interval < 0 || interval > 120)
3834 *rc = -EINVAL;
3835 else
3836 fan_watchdog_maxinterval = interval;
3837
3838 return 1;
3839 }
3840
3841 static int fan_write(char *buf)
3842 {
3843 char *cmd;
3844 int rc = 0;
3845
3846 while (!rc && (cmd = next_cmd(&buf))) {
3847 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
3848 fan_write_cmd_level(cmd, &rc)) &&
3849 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
3850 (fan_write_cmd_enable(cmd, &rc) ||
3851 fan_write_cmd_disable(cmd, &rc) ||
3852 fan_write_cmd_watchdog(cmd, &rc))) &&
3853 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
3854 fan_write_cmd_speed(cmd, &rc))
3855 )
3856 rc = -EINVAL;
3857 else if (!rc)
3858 fan_watchdog_reset();
3859 }
3860
3861 return rc;
3862 }
3863
3864 static struct ibm_struct fan_driver_data = {
3865 .name = "fan",
3866 .read = fan_read,
3867 .write = fan_write,
3868 .exit = fan_exit,
3869 };
3870
3871 /****************************************************************************
3872 ****************************************************************************
3873 *
3874 * Infrastructure
3875 *
3876 ****************************************************************************
3877 ****************************************************************************/
3878
3879 /* /proc support */
3880 static struct proc_dir_entry *proc_dir = NULL;
3881
3882 /* Subdriver registry */
3883 static LIST_HEAD(tpacpi_all_drivers);
3884
3885
3886 /*
3887 * Module and infrastructure proble, init and exit handling
3888 */
3889
3890 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
3891 static const char * __init str_supported(int is_supported)
3892 {
3893 static char text_unsupported[] __initdata = "not supported";
3894
3895 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
3896 }
3897 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3898
3899 static int __init ibm_init(struct ibm_init_struct *iibm)
3900 {
3901 int ret;
3902 struct ibm_struct *ibm = iibm->data;
3903 struct proc_dir_entry *entry;
3904
3905 BUG_ON(ibm == NULL);
3906
3907 INIT_LIST_HEAD(&ibm->all_drivers);
3908
3909 if (ibm->flags.experimental && !experimental)
3910 return 0;
3911
3912 dbg_printk(TPACPI_DBG_INIT,
3913 "probing for %s\n", ibm->name);
3914
3915 if (iibm->init) {
3916 ret = iibm->init(iibm);
3917 if (ret > 0)
3918 return 0; /* probe failed */
3919 if (ret)
3920 return ret;
3921
3922 ibm->flags.init_called = 1;
3923 }
3924
3925 if (ibm->acpi) {
3926 if (ibm->acpi->hid) {
3927 ret = register_tpacpi_subdriver(ibm);
3928 if (ret)
3929 goto err_out;
3930 }
3931
3932 if (ibm->acpi->notify) {
3933 ret = setup_acpi_notify(ibm);
3934 if (ret == -ENODEV) {
3935 printk(IBM_NOTICE "disabling subdriver %s\n",
3936 ibm->name);
3937 ret = 0;
3938 goto err_out;
3939 }
3940 if (ret < 0)
3941 goto err_out;
3942 }
3943 }
3944
3945 dbg_printk(TPACPI_DBG_INIT,
3946 "%s installed\n", ibm->name);
3947
3948 if (ibm->read) {
3949 entry = create_proc_entry(ibm->name,
3950 S_IFREG | S_IRUGO | S_IWUSR,
3951 proc_dir);
3952 if (!entry) {
3953 printk(IBM_ERR "unable to create proc entry %s\n",
3954 ibm->name);
3955 ret = -ENODEV;
3956 goto err_out;
3957 }
3958 entry->owner = THIS_MODULE;
3959 entry->data = ibm;
3960 entry->read_proc = &dispatch_procfs_read;
3961 if (ibm->write)
3962 entry->write_proc = &dispatch_procfs_write;
3963 ibm->flags.proc_created = 1;
3964 }
3965
3966 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
3967
3968 return 0;
3969
3970 err_out:
3971 dbg_printk(TPACPI_DBG_INIT,
3972 "%s: at error exit path with result %d\n",
3973 ibm->name, ret);
3974
3975 ibm_exit(ibm);
3976 return (ret < 0)? ret : 0;
3977 }
3978
3979 static void ibm_exit(struct ibm_struct *ibm)
3980 {
3981 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
3982
3983 list_del_init(&ibm->all_drivers);
3984
3985 if (ibm->flags.acpi_notify_installed) {
3986 dbg_printk(TPACPI_DBG_EXIT,
3987 "%s: acpi_remove_notify_handler\n", ibm->name);
3988 BUG_ON(!ibm->acpi);
3989 acpi_remove_notify_handler(*ibm->acpi->handle,
3990 ibm->acpi->type,
3991 dispatch_acpi_notify);
3992 ibm->flags.acpi_notify_installed = 0;
3993 ibm->flags.acpi_notify_installed = 0;
3994 }
3995
3996 if (ibm->flags.proc_created) {
3997 dbg_printk(TPACPI_DBG_EXIT,
3998 "%s: remove_proc_entry\n", ibm->name);
3999 remove_proc_entry(ibm->name, proc_dir);
4000 ibm->flags.proc_created = 0;
4001 }
4002
4003 if (ibm->flags.acpi_driver_registered) {
4004 dbg_printk(TPACPI_DBG_EXIT,
4005 "%s: acpi_bus_unregister_driver\n", ibm->name);
4006 BUG_ON(!ibm->acpi);
4007 acpi_bus_unregister_driver(ibm->acpi->driver);
4008 kfree(ibm->acpi->driver);
4009 ibm->acpi->driver = NULL;
4010 ibm->flags.acpi_driver_registered = 0;
4011 }
4012
4013 if (ibm->flags.init_called && ibm->exit) {
4014 ibm->exit();
4015 ibm->flags.init_called = 0;
4016 }
4017
4018 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4019 }
4020
4021 /* Probing */
4022
4023 static char *ibm_thinkpad_ec_found = NULL;
4024
4025 static char* __init check_dmi_for_ec(void)
4026 {
4027 struct dmi_device *dev = NULL;
4028 char ec_fw_string[18];
4029
4030 /*
4031 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4032 * X32 or newer, all Z series; Some models must have an
4033 * up-to-date BIOS or they will not be detected.
4034 *
4035 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4036 */
4037 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4038 if (sscanf(dev->name,
4039 "IBM ThinkPad Embedded Controller -[%17c",
4040 ec_fw_string) == 1) {
4041 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4042 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4043 return kstrdup(ec_fw_string, GFP_KERNEL);
4044 }
4045 }
4046 return NULL;
4047 }
4048
4049 static int __init probe_for_thinkpad(void)
4050 {
4051 int is_thinkpad;
4052
4053 if (acpi_disabled)
4054 return -ENODEV;
4055
4056 /*
4057 * Non-ancient models have better DMI tagging, but very old models
4058 * don't.
4059 */
4060 is_thinkpad = dmi_name_in_vendors("ThinkPad");
4061
4062 /* ec is required because many other handles are relative to it */
4063 IBM_ACPIHANDLE_INIT(ec);
4064 if (!ec_handle) {
4065 if (is_thinkpad)
4066 printk(IBM_ERR
4067 "Not yet supported ThinkPad detected!\n");
4068 return -ENODEV;
4069 }
4070
4071 /*
4072 * Risks a regression on very old machines, but reduces potential
4073 * false positives a damn great deal
4074 */
4075 if (!is_thinkpad)
4076 is_thinkpad = dmi_name_in_vendors("IBM");
4077
4078 if (!is_thinkpad && !force_load)
4079 return -ENODEV;
4080
4081 return 0;
4082 }
4083
4084
4085 /* Module init, exit, parameters */
4086
4087 static struct ibm_init_struct ibms_init[] __initdata = {
4088 {
4089 .init = thinkpad_acpi_driver_init,
4090 .data = &thinkpad_acpi_driver_data,
4091 },
4092 {
4093 .init = hotkey_init,
4094 .data = &hotkey_driver_data,
4095 },
4096 {
4097 .init = bluetooth_init,
4098 .data = &bluetooth_driver_data,
4099 },
4100 {
4101 .init = wan_init,
4102 .data = &wan_driver_data,
4103 },
4104 {
4105 .init = video_init,
4106 .data = &video_driver_data,
4107 },
4108 {
4109 .init = light_init,
4110 .data = &light_driver_data,
4111 },
4112 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4113 {
4114 .init = dock_init,
4115 .data = &dock_driver_data[0],
4116 },
4117 {
4118 .init = dock_init2,
4119 .data = &dock_driver_data[1],
4120 },
4121 #endif
4122 #ifdef CONFIG_THINKPAD_ACPI_BAY
4123 {
4124 .init = bay_init,
4125 .data = &bay_driver_data,
4126 },
4127 #endif
4128 {
4129 .init = cmos_init,
4130 .data = &cmos_driver_data,
4131 },
4132 {
4133 .init = led_init,
4134 .data = &led_driver_data,
4135 },
4136 {
4137 .init = beep_init,
4138 .data = &beep_driver_data,
4139 },
4140 {
4141 .init = thermal_init,
4142 .data = &thermal_driver_data,
4143 },
4144 {
4145 .data = &ecdump_driver_data,
4146 },
4147 {
4148 .init = brightness_init,
4149 .data = &brightness_driver_data,
4150 },
4151 {
4152 .data = &volume_driver_data,
4153 },
4154 {
4155 .init = fan_init,
4156 .data = &fan_driver_data,
4157 },
4158 };
4159
4160 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4161 {
4162 unsigned int i;
4163 struct ibm_struct *ibm;
4164
4165 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4166 ibm = ibms_init[i].data;
4167 BUG_ON(ibm == NULL);
4168
4169 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4170 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4171 return -ENOSPC;
4172 strcpy(ibms_init[i].param, val);
4173 strcat(ibms_init[i].param, ",");
4174 return 0;
4175 }
4176 }
4177
4178 return -EINVAL;
4179 }
4180
4181 static int experimental;
4182 module_param(experimental, int, 0);
4183
4184 static u32 dbg_level;
4185 module_param_named(debug, dbg_level, uint, 0);
4186
4187 static int force_load;
4188 module_param(force_load, int, 0);
4189
4190 static int fan_control_allowed;
4191 module_param_named(fan_control, fan_control_allowed, int, 0);
4192
4193 #define IBM_PARAM(feature) \
4194 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4195
4196 IBM_PARAM(hotkey);
4197 IBM_PARAM(bluetooth);
4198 IBM_PARAM(video);
4199 IBM_PARAM(light);
4200 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4201 IBM_PARAM(dock);
4202 #endif
4203 #ifdef CONFIG_THINKPAD_ACPI_BAY
4204 IBM_PARAM(bay);
4205 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4206 IBM_PARAM(cmos);
4207 IBM_PARAM(led);
4208 IBM_PARAM(beep);
4209 IBM_PARAM(ecdump);
4210 IBM_PARAM(brightness);
4211 IBM_PARAM(volume);
4212 IBM_PARAM(fan);
4213
4214 static int __init thinkpad_acpi_module_init(void)
4215 {
4216 int ret, i;
4217
4218 /* Driver-level probe */
4219 ret = probe_for_thinkpad();
4220 if (ret)
4221 return ret;
4222
4223 /* Driver initialization */
4224 ibm_thinkpad_ec_found = check_dmi_for_ec();
4225 IBM_ACPIHANDLE_INIT(ecrd);
4226 IBM_ACPIHANDLE_INIT(ecwr);
4227
4228 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4229 if (!proc_dir) {
4230 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4231 thinkpad_acpi_module_exit();
4232 return -ENODEV;
4233 }
4234 proc_dir->owner = THIS_MODULE;
4235
4236 ret = platform_driver_register(&tpacpi_pdriver);
4237 if (ret) {
4238 printk(IBM_ERR "unable to register platform driver\n");
4239 thinkpad_acpi_module_exit();
4240 return ret;
4241 }
4242 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4243 if (ret) {
4244 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4245 thinkpad_acpi_module_exit();
4246 return ret;
4247 }
4248
4249
4250 /* Device initialization */
4251 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4252 NULL, 0);
4253 if (IS_ERR(tpacpi_pdev)) {
4254 ret = PTR_ERR(tpacpi_pdev);
4255 tpacpi_pdev = NULL;
4256 printk(IBM_ERR "unable to register platform device\n");
4257 thinkpad_acpi_module_exit();
4258 return ret;
4259 }
4260 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4261 if (IS_ERR(tpacpi_hwmon)) {
4262 ret = PTR_ERR(tpacpi_hwmon);
4263 tpacpi_hwmon = NULL;
4264 printk(IBM_ERR "unable to register hwmon device\n");
4265 thinkpad_acpi_module_exit();
4266 return ret;
4267 }
4268 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4269 ret = ibm_init(&ibms_init[i]);
4270 if (ret >= 0 && *ibms_init[i].param)
4271 ret = ibms_init[i].data->write(ibms_init[i].param);
4272 if (ret < 0) {
4273 thinkpad_acpi_module_exit();
4274 return ret;
4275 }
4276 }
4277
4278 return 0;
4279 }
4280
4281 static void thinkpad_acpi_module_exit(void)
4282 {
4283 struct ibm_struct *ibm, *itmp;
4284
4285 list_for_each_entry_safe_reverse(ibm, itmp,
4286 &tpacpi_all_drivers,
4287 all_drivers) {
4288 ibm_exit(ibm);
4289 }
4290
4291 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4292
4293 if (tpacpi_hwmon)
4294 hwmon_device_unregister(tpacpi_hwmon);
4295
4296 if (tpacpi_pdev)
4297 platform_device_unregister(tpacpi_pdev);
4298
4299 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4300 platform_driver_unregister(&tpacpi_pdriver);
4301
4302 if (proc_dir)
4303 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4304
4305 kfree(ibm_thinkpad_ec_found);
4306 }
4307
4308 module_init(thinkpad_acpi_module_init);
4309 module_exit(thinkpad_acpi_module_exit);
Linux kernel - Deliverables
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