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ACPI: thinkpad-acpi: add sysfs support to hotkey subdriver
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blob91daa906beae5ce9072fca4091ec37b3618c859d
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(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(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(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(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,
828 TPACPI_HOTKEY_SYSFS_GROUP);
829 if (!hotkey_dev_attributes)
830 return -ENOMEM;
831 res = add_to_attr_set(hotkey_dev_attributes,
832 &dev_attr_hotkey_enable.attr);
833 if (res)
834 return res;
835
836 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
837 A30, R30, R31, T20-22, X20-21, X22-24 */
838 tp_features.hotkey_mask =
839 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
840
841 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
842 str_supported(tp_features.hotkey_mask));
843
844 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
845 if (!res && tp_features.hotkey_mask) {
846 res = add_many_to_attr_set(hotkey_dev_attributes,
847 hotkey_mask_attributes,
848 ARRAY_SIZE(hotkey_mask_attributes));
849 }
850 if (!res)
851 res = register_attr_set_with_sysfs(
852 hotkey_dev_attributes,
853 &tpacpi_pdev->dev.kobj);
854
855 if (res)
856 return res;
857 }
858
859 return (tp_features.hotkey)? 0 : 1;
860 }
861
862 static void hotkey_exit(void)
863 {
864 int res;
865
866 if (tp_features.hotkey) {
867 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
868 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
869 if (res)
870 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
871 }
872
873 if (hotkey_dev_attributes) {
874 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
875 hotkey_dev_attributes = NULL;
876 }
877 }
878
879 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
880 {
881 int hkey;
882
883 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
884 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
885 else {
886 printk(IBM_ERR "unknown hotkey event %d\n", event);
887 acpi_bus_generate_event(ibm->acpi->device, event, 0);
888 }
889 }
890
891 /*
892 * Call with hotkey_mutex held
893 */
894 static int hotkey_get(int *status, int *mask)
895 {
896 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
897 return -EIO;
898
899 if (tp_features.hotkey_mask)
900 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
901 return -EIO;
902
903 return 0;
904 }
905
906 /*
907 * Call with hotkey_mutex held
908 */
909 static int hotkey_set(int status, int mask)
910 {
911 int i;
912
913 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
914 return -EIO;
915
916 if (tp_features.hotkey_mask)
917 for (i = 0; i < 32; i++) {
918 int bit = ((1 << i) & mask) != 0;
919 if (!acpi_evalf(hkey_handle,
920 NULL, "MHKM", "vdd", i + 1, bit))
921 return -EIO;
922 }
923
924 return 0;
925 }
926
927 /* procfs -------------------------------------------------------------- */
928 static int hotkey_read(char *p)
929 {
930 int res, status, mask;
931 int len = 0;
932
933 if (!tp_features.hotkey) {
934 len += sprintf(p + len, "status:\t\tnot supported\n");
935 return len;
936 }
937
938 res = mutex_lock_interruptible(&hotkey_mutex);
939 if (res < 0)
940 return res;
941 res = hotkey_get(&status, &mask);
942 mutex_unlock(&hotkey_mutex);
943 if (res)
944 return res;
945
946 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
947 if (tp_features.hotkey_mask) {
948 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
949 len += sprintf(p + len,
950 "commands:\tenable, disable, reset, <mask>\n");
951 } else {
952 len += sprintf(p + len, "mask:\t\tnot supported\n");
953 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
954 }
955
956 return len;
957 }
958
959 static int hotkey_write(char *buf)
960 {
961 int res, status, mask;
962 char *cmd;
963 int do_cmd = 0;
964
965 if (!tp_features.hotkey)
966 return -ENODEV;
967
968 res = mutex_lock_interruptible(&hotkey_mutex);
969 if (res < 0)
970 return res;
971
972 res = hotkey_get(&status, &mask);
973 if (res)
974 goto errexit;
975
976 res = 0;
977 while ((cmd = next_cmd(&buf))) {
978 if (strlencmp(cmd, "enable") == 0) {
979 status = 1;
980 } else if (strlencmp(cmd, "disable") == 0) {
981 status = 0;
982 } else if (strlencmp(cmd, "reset") == 0) {
983 status = hotkey_orig_status;
984 mask = hotkey_orig_mask;
985 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
986 /* mask set */
987 } else if (sscanf(cmd, "%x", &mask) == 1) {
988 /* mask set */
989 } else {
990 res = -EINVAL;
991 goto errexit;
992 }
993 do_cmd = 1;
994 }
995
996 if (do_cmd)
997 res = hotkey_set(status, mask);
998
999 errexit:
1000 mutex_unlock(&hotkey_mutex);
1001 return res;
1002 }
1003
1004 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1005 .hid = IBM_HKEY_HID,
1006 .notify = hotkey_notify,
1007 .handle = &hkey_handle,
1008 .type = ACPI_DEVICE_NOTIFY,
1009 };
1010
1011 static struct ibm_struct hotkey_driver_data = {
1012 .name = "hotkey",
1013 .read = hotkey_read,
1014 .write = hotkey_write,
1015 .exit = hotkey_exit,
1016 .acpi = &ibm_hotkey_acpidriver,
1017 };
1018
1019 /*************************************************************************
1020 * Bluetooth subdriver
1021 */
1022
1023 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1024 {
1025 int status = 0;
1026
1027 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1028
1029 IBM_ACPIHANDLE_INIT(hkey);
1030
1031 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1032 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1033 tp_features.bluetooth = hkey_handle &&
1034 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1035
1036 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1037 str_supported(tp_features.bluetooth),
1038 status);
1039
1040 if (tp_features.bluetooth &&
1041 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1042 /* no bluetooth hardware present in system */
1043 tp_features.bluetooth = 0;
1044 dbg_printk(TPACPI_DBG_INIT,
1045 "bluetooth hardware not installed\n");
1046 }
1047
1048 return (tp_features.bluetooth)? 0 : 1;
1049 }
1050
1051 static int bluetooth_get_radiosw(void)
1052 {
1053 int status;
1054
1055 if (!tp_features.bluetooth)
1056 return -ENODEV;
1057
1058 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1059 return -EIO;
1060
1061 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1062 }
1063
1064 static int bluetooth_set_radiosw(int radio_on)
1065 {
1066 int status;
1067
1068 if (!tp_features.bluetooth)
1069 return -ENODEV;
1070
1071 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1072 return -EIO;
1073 if (radio_on)
1074 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1075 else
1076 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1077 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1078 return -EIO;
1079
1080 return 0;
1081 }
1082
1083 static int bluetooth_read(char *p)
1084 {
1085 int len = 0;
1086 int status = bluetooth_get_radiosw();
1087
1088 if (!tp_features.bluetooth)
1089 len += sprintf(p + len, "status:\t\tnot supported\n");
1090 else {
1091 len += sprintf(p + len, "status:\t\t%s\n",
1092 (status)? "enabled" : "disabled");
1093 len += sprintf(p + len, "commands:\tenable, disable\n");
1094 }
1095
1096 return len;
1097 }
1098
1099 static int bluetooth_write(char *buf)
1100 {
1101 char *cmd;
1102
1103 if (!tp_features.bluetooth)
1104 return -ENODEV;
1105
1106 while ((cmd = next_cmd(&buf))) {
1107 if (strlencmp(cmd, "enable") == 0) {
1108 bluetooth_set_radiosw(1);
1109 } else if (strlencmp(cmd, "disable") == 0) {
1110 bluetooth_set_radiosw(0);
1111 } else
1112 return -EINVAL;
1113 }
1114
1115 return 0;
1116 }
1117
1118 static struct ibm_struct bluetooth_driver_data = {
1119 .name = "bluetooth",
1120 .read = bluetooth_read,
1121 .write = bluetooth_write,
1122 };
1123
1124 /*************************************************************************
1125 * Wan subdriver
1126 */
1127
1128 static int __init wan_init(struct ibm_init_struct *iibm)
1129 {
1130 int status = 0;
1131
1132 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1133
1134 IBM_ACPIHANDLE_INIT(hkey);
1135
1136 tp_features.wan = hkey_handle &&
1137 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1138
1139 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1140 str_supported(tp_features.wan),
1141 status);
1142
1143 if (tp_features.wan &&
1144 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
1145 /* no wan hardware present in system */
1146 tp_features.wan = 0;
1147 dbg_printk(TPACPI_DBG_INIT,
1148 "wan hardware not installed\n");
1149 }
1150
1151 return (tp_features.wan)? 0 : 1;
1152 }
1153
1154 static int wan_get_radiosw(void)
1155 {
1156 int status;
1157
1158 if (!tp_features.wan)
1159 return -ENODEV;
1160
1161 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1162 return -EIO;
1163
1164 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1165 }
1166
1167 static int wan_set_radiosw(int radio_on)
1168 {
1169 int status;
1170
1171 if (!tp_features.wan)
1172 return -ENODEV;
1173
1174 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1175 return -EIO;
1176 if (radio_on)
1177 status |= TP_ACPI_WANCARD_RADIOSSW;
1178 else
1179 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1180 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1181 return -EIO;
1182
1183 return 0;
1184 }
1185
1186 static int wan_read(char *p)
1187 {
1188 int len = 0;
1189 int status = wan_get_radiosw();
1190
1191 if (!tp_features.wan)
1192 len += sprintf(p + len, "status:\t\tnot supported\n");
1193 else {
1194 len += sprintf(p + len, "status:\t\t%s\n",
1195 (status)? "enabled" : "disabled");
1196 len += sprintf(p + len, "commands:\tenable, disable\n");
1197 }
1198
1199 return len;
1200 }
1201
1202 static int wan_write(char *buf)
1203 {
1204 char *cmd;
1205
1206 if (!tp_features.wan)
1207 return -ENODEV;
1208
1209 while ((cmd = next_cmd(&buf))) {
1210 if (strlencmp(cmd, "enable") == 0) {
1211 wan_set_radiosw(1);
1212 } else if (strlencmp(cmd, "disable") == 0) {
1213 wan_set_radiosw(0);
1214 } else
1215 return -EINVAL;
1216 }
1217
1218 return 0;
1219 }
1220
1221 static struct ibm_struct wan_driver_data = {
1222 .name = "wan",
1223 .read = wan_read,
1224 .write = wan_write,
1225 .flags.experimental = 1,
1226 };
1227
1228 /*************************************************************************
1229 * Video subdriver
1230 */
1231
1232 static enum video_access_mode video_supported;
1233 static int video_orig_autosw;
1234
1235 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1236 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1237 "\\_SB.PCI0.VID0", /* 770e */
1238 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1239 "\\_SB.PCI0.AGP.VID", /* all others */
1240 ); /* R30, R31 */
1241
1242 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1243
1244 static int __init video_init(struct ibm_init_struct *iibm)
1245 {
1246 int ivga;
1247
1248 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1249
1250 IBM_ACPIHANDLE_INIT(vid);
1251 IBM_ACPIHANDLE_INIT(vid2);
1252
1253 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1254 /* G41, assume IVGA doesn't change */
1255 vid_handle = vid2_handle;
1256
1257 if (!vid_handle)
1258 /* video switching not supported on R30, R31 */
1259 video_supported = TPACPI_VIDEO_NONE;
1260 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1261 /* 570 */
1262 video_supported = TPACPI_VIDEO_570;
1263 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1264 /* 600e/x, 770e, 770x */
1265 video_supported = TPACPI_VIDEO_770;
1266 else
1267 /* all others */
1268 video_supported = TPACPI_VIDEO_NEW;
1269
1270 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1271 str_supported(video_supported != TPACPI_VIDEO_NONE),
1272 video_supported);
1273
1274 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1275 }
1276
1277 static void video_exit(void)
1278 {
1279 dbg_printk(TPACPI_DBG_EXIT,
1280 "restoring original video autoswitch mode\n");
1281 if (video_autosw_set(video_orig_autosw))
1282 printk(IBM_ERR "error while trying to restore original "
1283 "video autoswitch mode\n");
1284 }
1285
1286 static int video_outputsw_get(void)
1287 {
1288 int status = 0;
1289 int i;
1290
1291 switch (video_supported) {
1292 case TPACPI_VIDEO_570:
1293 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1294 TP_ACPI_VIDEO_570_PHSCMD))
1295 return -EIO;
1296 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1297 break;
1298 case TPACPI_VIDEO_770:
1299 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1300 return -EIO;
1301 if (i)
1302 status |= TP_ACPI_VIDEO_S_LCD;
1303 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1304 return -EIO;
1305 if (i)
1306 status |= TP_ACPI_VIDEO_S_CRT;
1307 break;
1308 case TPACPI_VIDEO_NEW:
1309 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1310 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1311 return -EIO;
1312 if (i)
1313 status |= TP_ACPI_VIDEO_S_CRT;
1314
1315 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1316 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1317 return -EIO;
1318 if (i)
1319 status |= TP_ACPI_VIDEO_S_LCD;
1320 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1321 return -EIO;
1322 if (i)
1323 status |= TP_ACPI_VIDEO_S_DVI;
1324 break;
1325 default:
1326 return -ENOSYS;
1327 }
1328
1329 return status;
1330 }
1331
1332 static int video_outputsw_set(int status)
1333 {
1334 int autosw;
1335 int res = 0;
1336
1337 switch (video_supported) {
1338 case TPACPI_VIDEO_570:
1339 res = acpi_evalf(NULL, NULL,
1340 "\\_SB.PHS2", "vdd",
1341 TP_ACPI_VIDEO_570_PHS2CMD,
1342 status | TP_ACPI_VIDEO_570_PHS2SET);
1343 break;
1344 case TPACPI_VIDEO_770:
1345 autosw = video_autosw_get();
1346 if (autosw < 0)
1347 return autosw;
1348
1349 res = video_autosw_set(1);
1350 if (res)
1351 return res;
1352 res = acpi_evalf(vid_handle, NULL,
1353 "ASWT", "vdd", status * 0x100, 0);
1354 if (!autosw && video_autosw_set(autosw)) {
1355 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1356 return -EIO;
1357 }
1358 break;
1359 case TPACPI_VIDEO_NEW:
1360 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1361 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1362 break;
1363 default:
1364 return -ENOSYS;
1365 }
1366
1367 return (res)? 0 : -EIO;
1368 }
1369
1370 static int video_autosw_get(void)
1371 {
1372 int autosw = 0;
1373
1374 switch (video_supported) {
1375 case TPACPI_VIDEO_570:
1376 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1377 return -EIO;
1378 break;
1379 case TPACPI_VIDEO_770:
1380 case TPACPI_VIDEO_NEW:
1381 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1382 return -EIO;
1383 break;
1384 default:
1385 return -ENOSYS;
1386 }
1387
1388 return autosw & 1;
1389 }
1390
1391 static int video_autosw_set(int enable)
1392 {
1393 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1394 return -EIO;
1395 return 0;
1396 }
1397
1398 static int video_outputsw_cycle(void)
1399 {
1400 int autosw = video_autosw_get();
1401 int res;
1402
1403 if (autosw < 0)
1404 return autosw;
1405
1406 switch (video_supported) {
1407 case TPACPI_VIDEO_570:
1408 res = video_autosw_set(1);
1409 if (res)
1410 return res;
1411 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1412 break;
1413 case TPACPI_VIDEO_770:
1414 case TPACPI_VIDEO_NEW:
1415 res = video_autosw_set(1);
1416 if (res)
1417 return res;
1418 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1419 break;
1420 default:
1421 return -ENOSYS;
1422 }
1423 if (!autosw && video_autosw_set(autosw)) {
1424 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1425 return -EIO;
1426 }
1427
1428 return (res)? 0 : -EIO;
1429 }
1430
1431 static int video_expand_toggle(void)
1432 {
1433 switch (video_supported) {
1434 case TPACPI_VIDEO_570:
1435 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1436 0 : -EIO;
1437 case TPACPI_VIDEO_770:
1438 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1439 0 : -EIO;
1440 case TPACPI_VIDEO_NEW:
1441 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1442 0 : -EIO;
1443 default:
1444 return -ENOSYS;
1445 }
1446 /* not reached */
1447 }
1448
1449 static int video_read(char *p)
1450 {
1451 int status, autosw;
1452 int len = 0;
1453
1454 if (video_supported == TPACPI_VIDEO_NONE) {
1455 len += sprintf(p + len, "status:\t\tnot supported\n");
1456 return len;
1457 }
1458
1459 status = video_outputsw_get();
1460 if (status < 0)
1461 return status;
1462
1463 autosw = video_autosw_get();
1464 if (autosw < 0)
1465 return autosw;
1466
1467 len += sprintf(p + len, "status:\t\tsupported\n");
1468 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1469 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1470 if (video_supported == TPACPI_VIDEO_NEW)
1471 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1472 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1473 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1474 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1475 if (video_supported == TPACPI_VIDEO_NEW)
1476 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1477 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1478 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1479
1480 return len;
1481 }
1482
1483 static int video_write(char *buf)
1484 {
1485 char *cmd;
1486 int enable, disable, status;
1487 int res;
1488
1489 if (video_supported == TPACPI_VIDEO_NONE)
1490 return -ENODEV;
1491
1492 enable = 0;
1493 disable = 0;
1494
1495 while ((cmd = next_cmd(&buf))) {
1496 if (strlencmp(cmd, "lcd_enable") == 0) {
1497 enable |= TP_ACPI_VIDEO_S_LCD;
1498 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1499 disable |= TP_ACPI_VIDEO_S_LCD;
1500 } else if (strlencmp(cmd, "crt_enable") == 0) {
1501 enable |= TP_ACPI_VIDEO_S_CRT;
1502 } else if (strlencmp(cmd, "crt_disable") == 0) {
1503 disable |= TP_ACPI_VIDEO_S_CRT;
1504 } else if (video_supported == TPACPI_VIDEO_NEW &&
1505 strlencmp(cmd, "dvi_enable") == 0) {
1506 enable |= TP_ACPI_VIDEO_S_DVI;
1507 } else if (video_supported == TPACPI_VIDEO_NEW &&
1508 strlencmp(cmd, "dvi_disable") == 0) {
1509 disable |= TP_ACPI_VIDEO_S_DVI;
1510 } else if (strlencmp(cmd, "auto_enable") == 0) {
1511 res = video_autosw_set(1);
1512 if (res)
1513 return res;
1514 } else if (strlencmp(cmd, "auto_disable") == 0) {
1515 res = video_autosw_set(0);
1516 if (res)
1517 return res;
1518 } else if (strlencmp(cmd, "video_switch") == 0) {
1519 res = video_outputsw_cycle();
1520 if (res)
1521 return res;
1522 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1523 res = video_expand_toggle();
1524 if (res)
1525 return res;
1526 } else
1527 return -EINVAL;
1528 }
1529
1530 if (enable || disable) {
1531 status = video_outputsw_get();
1532 if (status < 0)
1533 return status;
1534 res = video_outputsw_set((status & ~disable) | enable);
1535 if (res)
1536 return res;
1537 }
1538
1539 return 0;
1540 }
1541
1542 static struct ibm_struct video_driver_data = {
1543 .name = "video",
1544 .read = video_read,
1545 .write = video_write,
1546 .exit = video_exit,
1547 };
1548
1549 /*************************************************************************
1550 * Light (thinklight) subdriver
1551 */
1552
1553 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1554 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1555
1556 static int __init light_init(struct ibm_init_struct *iibm)
1557 {
1558 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1559
1560 IBM_ACPIHANDLE_INIT(ledb);
1561 IBM_ACPIHANDLE_INIT(lght);
1562 IBM_ACPIHANDLE_INIT(cmos);
1563
1564 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1565 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1566
1567 if (tp_features.light)
1568 /* light status not supported on
1569 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1570 tp_features.light_status =
1571 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1572
1573 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1574 str_supported(tp_features.light));
1575
1576 return (tp_features.light)? 0 : 1;
1577 }
1578
1579 static int light_read(char *p)
1580 {
1581 int len = 0;
1582 int status = 0;
1583
1584 if (!tp_features.light) {
1585 len += sprintf(p + len, "status:\t\tnot supported\n");
1586 } else if (!tp_features.light_status) {
1587 len += sprintf(p + len, "status:\t\tunknown\n");
1588 len += sprintf(p + len, "commands:\ton, off\n");
1589 } else {
1590 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1591 return -EIO;
1592 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1593 len += sprintf(p + len, "commands:\ton, off\n");
1594 }
1595
1596 return len;
1597 }
1598
1599 static int light_write(char *buf)
1600 {
1601 int cmos_cmd, lght_cmd;
1602 char *cmd;
1603 int success;
1604
1605 if (!tp_features.light)
1606 return -ENODEV;
1607
1608 while ((cmd = next_cmd(&buf))) {
1609 if (strlencmp(cmd, "on") == 0) {
1610 cmos_cmd = 0x0c;
1611 lght_cmd = 1;
1612 } else if (strlencmp(cmd, "off") == 0) {
1613 cmos_cmd = 0x0d;
1614 lght_cmd = 0;
1615 } else
1616 return -EINVAL;
1617
1618 success = cmos_handle ?
1619 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1620 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1621 if (!success)
1622 return -EIO;
1623 }
1624
1625 return 0;
1626 }
1627
1628 static struct ibm_struct light_driver_data = {
1629 .name = "light",
1630 .read = light_read,
1631 .write = light_write,
1632 };
1633
1634 /*************************************************************************
1635 * Dock subdriver
1636 */
1637
1638 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1639
1640 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1641 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1642 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1643 "\\_SB.PCI.ISA.SLCE", /* 570 */
1644 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1645
1646 /* don't list other alternatives as we install a notify handler on the 570 */
1647 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1648
1649 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1650 {
1651 .notify = dock_notify,
1652 .handle = &dock_handle,
1653 .type = ACPI_SYSTEM_NOTIFY,
1654 },
1655 {
1656 .hid = IBM_PCI_HID,
1657 .notify = dock_notify,
1658 .handle = &pci_handle,
1659 .type = ACPI_SYSTEM_NOTIFY,
1660 },
1661 };
1662
1663 static struct ibm_struct dock_driver_data[2] = {
1664 {
1665 .name = "dock",
1666 .read = dock_read,
1667 .write = dock_write,
1668 .acpi = &ibm_dock_acpidriver[0],
1669 },
1670 {
1671 .name = "dock",
1672 .acpi = &ibm_dock_acpidriver[1],
1673 },
1674 };
1675
1676 #define dock_docked() (_sta(dock_handle) & 1)
1677
1678 static int __init dock_init(struct ibm_init_struct *iibm)
1679 {
1680 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1681
1682 IBM_ACPIHANDLE_INIT(dock);
1683
1684 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1685 str_supported(dock_handle != NULL));
1686
1687 return (dock_handle)? 0 : 1;
1688 }
1689
1690 static int __init dock_init2(struct ibm_init_struct *iibm)
1691 {
1692 int dock2_needed;
1693
1694 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
1695
1696 if (dock_driver_data[0].flags.acpi_driver_registered &&
1697 dock_driver_data[0].flags.acpi_notify_installed) {
1698 IBM_ACPIHANDLE_INIT(pci);
1699 dock2_needed = (pci_handle != NULL);
1700 vdbg_printk(TPACPI_DBG_INIT,
1701 "dock PCI handler for the TP 570 is %s\n",
1702 str_supported(dock2_needed));
1703 } else {
1704 vdbg_printk(TPACPI_DBG_INIT,
1705 "dock subdriver part 2 not required\n");
1706 dock2_needed = 0;
1707 }
1708
1709 return (dock2_needed)? 0 : 1;
1710 }
1711
1712 static void dock_notify(struct ibm_struct *ibm, u32 event)
1713 {
1714 int docked = dock_docked();
1715 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1716
1717 if (event == 1 && !pci) /* 570 */
1718 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1719 else if (event == 1 && pci) /* 570 */
1720 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1721 else if (event == 3 && docked)
1722 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1723 else if (event == 3 && !docked)
1724 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
1725 else if (event == 0 && docked)
1726 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1727 else {
1728 printk(IBM_ERR "unknown dock event %d, status %d\n",
1729 event, _sta(dock_handle));
1730 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
1731 }
1732 }
1733
1734 static int dock_read(char *p)
1735 {
1736 int len = 0;
1737 int docked = dock_docked();
1738
1739 if (!dock_handle)
1740 len += sprintf(p + len, "status:\t\tnot supported\n");
1741 else if (!docked)
1742 len += sprintf(p + len, "status:\t\tundocked\n");
1743 else {
1744 len += sprintf(p + len, "status:\t\tdocked\n");
1745 len += sprintf(p + len, "commands:\tdock, undock\n");
1746 }
1747
1748 return len;
1749 }
1750
1751 static int dock_write(char *buf)
1752 {
1753 char *cmd;
1754
1755 if (!dock_docked())
1756 return -ENODEV;
1757
1758 while ((cmd = next_cmd(&buf))) {
1759 if (strlencmp(cmd, "undock") == 0) {
1760 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1761 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1762 return -EIO;
1763 } else if (strlencmp(cmd, "dock") == 0) {
1764 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1765 return -EIO;
1766 } else
1767 return -EINVAL;
1768 }
1769
1770 return 0;
1771 }
1772
1773 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1774
1775 /*************************************************************************
1776 * Bay subdriver
1777 */
1778
1779 #ifdef CONFIG_THINKPAD_ACPI_BAY
1780 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1781 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1782 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1783 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1784 ); /* A21e, R30, R31 */
1785 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1786 "_EJ0", /* all others */
1787 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1788 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1789 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1790 ); /* all others */
1791 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1792 "_EJ0", /* 770x */
1793 ); /* all others */
1794
1795 static int __init bay_init(struct ibm_init_struct *iibm)
1796 {
1797 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1798
1799 IBM_ACPIHANDLE_INIT(bay);
1800 if (bay_handle)
1801 IBM_ACPIHANDLE_INIT(bay_ej);
1802 IBM_ACPIHANDLE_INIT(bay2);
1803 if (bay2_handle)
1804 IBM_ACPIHANDLE_INIT(bay2_ej);
1805
1806 tp_features.bay_status = bay_handle &&
1807 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1808 tp_features.bay_status2 = bay2_handle &&
1809 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1810
1811 tp_features.bay_eject = bay_handle && bay_ej_handle &&
1812 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1813 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1814 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1815
1816 vdbg_printk(TPACPI_DBG_INIT,
1817 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1818 str_supported(tp_features.bay_status),
1819 str_supported(tp_features.bay_eject),
1820 str_supported(tp_features.bay_status2),
1821 str_supported(tp_features.bay_eject2));
1822
1823 return (tp_features.bay_status || tp_features.bay_eject ||
1824 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1825 }
1826
1827 static void bay_notify(struct ibm_struct *ibm, u32 event)
1828 {
1829 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1830 }
1831
1832 #define bay_occupied(b) (_sta(b##_handle) & 1)
1833
1834 static int bay_read(char *p)
1835 {
1836 int len = 0;
1837 int occupied = bay_occupied(bay);
1838 int occupied2 = bay_occupied(bay2);
1839 int eject, eject2;
1840
1841 len += sprintf(p + len, "status:\t\t%s\n",
1842 tp_features.bay_status ?
1843 (occupied ? "occupied" : "unoccupied") :
1844 "not supported");
1845 if (tp_features.bay_status2)
1846 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1847 "occupied" : "unoccupied");
1848
1849 eject = tp_features.bay_eject && occupied;
1850 eject2 = tp_features.bay_eject2 && occupied2;
1851
1852 if (eject && eject2)
1853 len += sprintf(p + len, "commands:\teject, eject2\n");
1854 else if (eject)
1855 len += sprintf(p + len, "commands:\teject\n");
1856 else if (eject2)
1857 len += sprintf(p + len, "commands:\teject2\n");
1858
1859 return len;
1860 }
1861
1862 static int bay_write(char *buf)
1863 {
1864 char *cmd;
1865
1866 if (!tp_features.bay_eject && !tp_features.bay_eject2)
1867 return -ENODEV;
1868
1869 while ((cmd = next_cmd(&buf))) {
1870 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1871 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1872 return -EIO;
1873 } else if (tp_features.bay_eject2 &&
1874 strlencmp(cmd, "eject2") == 0) {
1875 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1876 return -EIO;
1877 } else
1878 return -EINVAL;
1879 }
1880
1881 return 0;
1882 }
1883
1884 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
1885 .notify = bay_notify,
1886 .handle = &bay_handle,
1887 .type = ACPI_SYSTEM_NOTIFY,
1888 };
1889
1890 static struct ibm_struct bay_driver_data = {
1891 .name = "bay",
1892 .read = bay_read,
1893 .write = bay_write,
1894 .acpi = &ibm_bay_acpidriver,
1895 };
1896
1897 #endif /* CONFIG_THINKPAD_ACPI_BAY */
1898
1899 /*************************************************************************
1900 * CMOS subdriver
1901 */
1902
1903 /* sysfs cmos_command -------------------------------------------------- */
1904 static ssize_t cmos_command_store(struct device *dev,
1905 struct device_attribute *attr,
1906 const char *buf, size_t count)
1907 {
1908 unsigned long cmos_cmd;
1909 int res;
1910
1911 if (parse_strtoul(buf, 21, &cmos_cmd))
1912 return -EINVAL;
1913
1914 res = issue_thinkpad_cmos_command(cmos_cmd);
1915 return (res)? res : count;
1916 }
1917
1918 static struct device_attribute dev_attr_cmos_command =
1919 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
1920
1921 /* --------------------------------------------------------------------- */
1922
1923 static int __init cmos_init(struct ibm_init_struct *iibm)
1924 {
1925 int res;
1926
1927 vdbg_printk(TPACPI_DBG_INIT,
1928 "initializing cmos commands subdriver\n");
1929
1930 IBM_ACPIHANDLE_INIT(cmos);
1931
1932 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1933 str_supported(cmos_handle != NULL));
1934
1935 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
1936 if (res)
1937 return res;
1938
1939 return (cmos_handle)? 0 : 1;
1940 }
1941
1942 static void cmos_exit(void)
1943 {
1944 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
1945 }
1946
1947 static int cmos_read(char *p)
1948 {
1949 int len = 0;
1950
1951 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1952 R30, R31, T20-22, X20-21 */
1953 if (!cmos_handle)
1954 len += sprintf(p + len, "status:\t\tnot supported\n");
1955 else {
1956 len += sprintf(p + len, "status:\t\tsupported\n");
1957 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1958 }
1959
1960 return len;
1961 }
1962
1963 static int cmos_write(char *buf)
1964 {
1965 char *cmd;
1966 int cmos_cmd, res;
1967
1968 while ((cmd = next_cmd(&buf))) {
1969 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1970 cmos_cmd >= 0 && cmos_cmd <= 21) {
1971 /* cmos_cmd set */
1972 } else
1973 return -EINVAL;
1974
1975 res = issue_thinkpad_cmos_command(cmos_cmd);
1976 if (res)
1977 return res;
1978 }
1979
1980 return 0;
1981 }
1982
1983 static struct ibm_struct cmos_driver_data = {
1984 .name = "cmos",
1985 .read = cmos_read,
1986 .write = cmos_write,
1987 .exit = cmos_exit,
1988 };
1989
1990 /*************************************************************************
1991 * LED subdriver
1992 */
1993
1994 static enum led_access_mode led_supported;
1995
1996 IBM_HANDLE(led, ec, "SLED", /* 570 */
1997 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1998 "LED", /* all others */
1999 ); /* R30, R31 */
2000
2001 static int __init led_init(struct ibm_init_struct *iibm)
2002 {
2003 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2004
2005 IBM_ACPIHANDLE_INIT(led);
2006
2007 if (!led_handle)
2008 /* led not supported on R30, R31 */
2009 led_supported = TPACPI_LED_NONE;
2010 else if (strlencmp(led_path, "SLED") == 0)
2011 /* 570 */
2012 led_supported = TPACPI_LED_570;
2013 else if (strlencmp(led_path, "SYSL") == 0)
2014 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2015 led_supported = TPACPI_LED_OLD;
2016 else
2017 /* all others */
2018 led_supported = TPACPI_LED_NEW;
2019
2020 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2021 str_supported(led_supported), led_supported);
2022
2023 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2024 }
2025
2026 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2027
2028 static int led_read(char *p)
2029 {
2030 int len = 0;
2031
2032 if (!led_supported) {
2033 len += sprintf(p + len, "status:\t\tnot supported\n");
2034 return len;
2035 }
2036 len += sprintf(p + len, "status:\t\tsupported\n");
2037
2038 if (led_supported == TPACPI_LED_570) {
2039 /* 570 */
2040 int i, status;
2041 for (i = 0; i < 8; i++) {
2042 if (!acpi_evalf(ec_handle,
2043 &status, "GLED", "dd", 1 << i))
2044 return -EIO;
2045 len += sprintf(p + len, "%d:\t\t%s\n",
2046 i, led_status(status));
2047 }
2048 }
2049
2050 len += sprintf(p + len, "commands:\t"
2051 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2052
2053 return len;
2054 }
2055
2056 /* off, on, blink */
2057 static const int led_sled_arg1[] = { 0, 1, 3 };
2058 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
2059 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
2060 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2061
2062 static int led_write(char *buf)
2063 {
2064 char *cmd;
2065 int led, ind, ret;
2066
2067 if (!led_supported)
2068 return -ENODEV;
2069
2070 while ((cmd = next_cmd(&buf))) {
2071 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2072 return -EINVAL;
2073
2074 if (strstr(cmd, "off")) {
2075 ind = 0;
2076 } else if (strstr(cmd, "on")) {
2077 ind = 1;
2078 } else if (strstr(cmd, "blink")) {
2079 ind = 2;
2080 } else
2081 return -EINVAL;
2082
2083 if (led_supported == TPACPI_LED_570) {
2084 /* 570 */
2085 led = 1 << led;
2086 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2087 led, led_sled_arg1[ind]))
2088 return -EIO;
2089 } else if (led_supported == TPACPI_LED_OLD) {
2090 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2091 led = 1 << led;
2092 ret = ec_write(TPACPI_LED_EC_HLMS, led);
2093 if (ret >= 0)
2094 ret =
2095 ec_write(TPACPI_LED_EC_HLBL,
2096 led * led_exp_hlbl[ind]);
2097 if (ret >= 0)
2098 ret =
2099 ec_write(TPACPI_LED_EC_HLCL,
2100 led * led_exp_hlcl[ind]);
2101 if (ret < 0)
2102 return ret;
2103 } else {
2104 /* all others */
2105 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2106 led, led_led_arg1[ind]))
2107 return -EIO;
2108 }
2109 }
2110
2111 return 0;
2112 }
2113
2114 static struct ibm_struct led_driver_data = {
2115 .name = "led",
2116 .read = led_read,
2117 .write = led_write,
2118 };
2119
2120 /*************************************************************************
2121 * Beep subdriver
2122 */
2123
2124 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
2125
2126 static int __init beep_init(struct ibm_init_struct *iibm)
2127 {
2128 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2129
2130 IBM_ACPIHANDLE_INIT(beep);
2131
2132 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2133 str_supported(beep_handle != NULL));
2134
2135 return (beep_handle)? 0 : 1;
2136 }
2137
2138 static int beep_read(char *p)
2139 {
2140 int len = 0;
2141
2142 if (!beep_handle)
2143 len += sprintf(p + len, "status:\t\tnot supported\n");
2144 else {
2145 len += sprintf(p + len, "status:\t\tsupported\n");
2146 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2147 }
2148
2149 return len;
2150 }
2151
2152 static int beep_write(char *buf)
2153 {
2154 char *cmd;
2155 int beep_cmd;
2156
2157 if (!beep_handle)
2158 return -ENODEV;
2159
2160 while ((cmd = next_cmd(&buf))) {
2161 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2162 beep_cmd >= 0 && beep_cmd <= 17) {
2163 /* beep_cmd set */
2164 } else
2165 return -EINVAL;
2166 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2167 return -EIO;
2168 }
2169
2170 return 0;
2171 }
2172
2173 static struct ibm_struct beep_driver_data = {
2174 .name = "beep",
2175 .read = beep_read,
2176 .write = beep_write,
2177 };
2178
2179 /*************************************************************************
2180 * Thermal subdriver
2181 */
2182
2183 static enum thermal_access_mode thermal_read_mode;
2184
2185 /* sysfs temp##_input -------------------------------------------------- */
2186
2187 static ssize_t thermal_temp_input_show(struct device *dev,
2188 struct device_attribute *attr,
2189 char *buf)
2190 {
2191 struct sensor_device_attribute *sensor_attr =
2192 to_sensor_dev_attr(attr);
2193 int idx = sensor_attr->index;
2194 s32 value;
2195 int res;
2196
2197 res = thermal_get_sensor(idx, &value);
2198 if (res)
2199 return res;
2200 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2201 return -ENXIO;
2202
2203 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2204 }
2205
2206 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2207 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2208
2209 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2210 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2211 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2212 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2213 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2214 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2215 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2216 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2217 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2218 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2219 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2220 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2221 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2222 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2223 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2224 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2225 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2226 };
2227
2228 #define THERMAL_ATTRS(X) \
2229 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2230
2231 static struct attribute *thermal_temp_input_attr[] = {
2232 THERMAL_ATTRS(8),
2233 THERMAL_ATTRS(9),
2234 THERMAL_ATTRS(10),
2235 THERMAL_ATTRS(11),
2236 THERMAL_ATTRS(12),
2237 THERMAL_ATTRS(13),
2238 THERMAL_ATTRS(14),
2239 THERMAL_ATTRS(15),
2240 THERMAL_ATTRS(0),
2241 THERMAL_ATTRS(1),
2242 THERMAL_ATTRS(2),
2243 THERMAL_ATTRS(3),
2244 THERMAL_ATTRS(4),
2245 THERMAL_ATTRS(5),
2246 THERMAL_ATTRS(6),
2247 THERMAL_ATTRS(7),
2248 NULL
2249 };
2250
2251 static const struct attribute_group thermal_temp_input16_group = {
2252 .attrs = thermal_temp_input_attr
2253 };
2254
2255 static const struct attribute_group thermal_temp_input8_group = {
2256 .attrs = &thermal_temp_input_attr[8]
2257 };
2258
2259 #undef THERMAL_SENSOR_ATTR_TEMP
2260 #undef THERMAL_ATTRS
2261
2262 /* --------------------------------------------------------------------- */
2263
2264 static int __init thermal_init(struct ibm_init_struct *iibm)
2265 {
2266 u8 t, ta1, ta2;
2267 int i;
2268 int acpi_tmp7;
2269 int res;
2270
2271 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2272
2273 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2274
2275 if (ibm_thinkpad_ec_found && experimental) {
2276 /*
2277 * Direct EC access mode: sensors at registers
2278 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2279 * non-implemented, thermal sensors return 0x80 when
2280 * not available
2281 */
2282
2283 ta1 = ta2 = 0;
2284 for (i = 0; i < 8; i++) {
2285 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2286 ta1 |= t;
2287 } else {
2288 ta1 = 0;
2289 break;
2290 }
2291 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2292 ta2 |= t;
2293 } else {
2294 ta1 = 0;
2295 break;
2296 }
2297 }
2298 if (ta1 == 0) {
2299 /* This is sheer paranoia, but we handle it anyway */
2300 if (acpi_tmp7) {
2301 printk(IBM_ERR
2302 "ThinkPad ACPI EC access misbehaving, "
2303 "falling back to ACPI TMPx access mode\n");
2304 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2305 } else {
2306 printk(IBM_ERR
2307 "ThinkPad ACPI EC access misbehaving, "
2308 "disabling thermal sensors access\n");
2309 thermal_read_mode = TPACPI_THERMAL_NONE;
2310 }
2311 } else {
2312 thermal_read_mode =
2313 (ta2 != 0) ?
2314 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2315 }
2316 } else if (acpi_tmp7) {
2317 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2318 /* 600e/x, 770e, 770x */
2319 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2320 } else {
2321 /* Standard ACPI TMPx access, max 8 sensors */
2322 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2323 }
2324 } else {
2325 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2326 thermal_read_mode = TPACPI_THERMAL_NONE;
2327 }
2328
2329 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2330 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2331 thermal_read_mode);
2332
2333 switch(thermal_read_mode) {
2334 case TPACPI_THERMAL_TPEC_16:
2335 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2336 &thermal_temp_input16_group);
2337 if (res)
2338 return res;
2339 break;
2340 case TPACPI_THERMAL_TPEC_8:
2341 case TPACPI_THERMAL_ACPI_TMP07:
2342 case TPACPI_THERMAL_ACPI_UPDT:
2343 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2344 &thermal_temp_input8_group);
2345 if (res)
2346 return res;
2347 break;
2348 case TPACPI_THERMAL_NONE:
2349 default:
2350 return 1;
2351 }
2352
2353 return 0;
2354 }
2355
2356 static void thermal_exit(void)
2357 {
2358 switch(thermal_read_mode) {
2359 case TPACPI_THERMAL_TPEC_16:
2360 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2361 &thermal_temp_input16_group);
2362 break;
2363 case TPACPI_THERMAL_TPEC_8:
2364 case TPACPI_THERMAL_ACPI_TMP07:
2365 case TPACPI_THERMAL_ACPI_UPDT:
2366 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2367 &thermal_temp_input16_group);
2368 break;
2369 case TPACPI_THERMAL_NONE:
2370 default:
2371 break;
2372 }
2373 }
2374
2375 /* idx is zero-based */
2376 static int thermal_get_sensor(int idx, s32 *value)
2377 {
2378 int t;
2379 s8 tmp;
2380 char tmpi[5];
2381
2382 t = TP_EC_THERMAL_TMP0;
2383
2384 switch (thermal_read_mode) {
2385 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2386 case TPACPI_THERMAL_TPEC_16:
2387 if (idx >= 8 && idx <= 15) {
2388 t = TP_EC_THERMAL_TMP8;
2389 idx -= 8;
2390 }
2391 /* fallthrough */
2392 #endif
2393 case TPACPI_THERMAL_TPEC_8:
2394 if (idx <= 7) {
2395 if (!acpi_ec_read(t + idx, &tmp))
2396 return -EIO;
2397 *value = tmp * 1000;
2398 return 0;
2399 }
2400 break;
2401
2402 case TPACPI_THERMAL_ACPI_UPDT:
2403 if (idx <= 7) {
2404 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2405 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2406 return -EIO;
2407 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2408 return -EIO;
2409 *value = (t - 2732) * 100;
2410 return 0;
2411 }
2412 break;
2413
2414 case TPACPI_THERMAL_ACPI_TMP07:
2415 if (idx <= 7) {
2416 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2417 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2418 return -EIO;
2419 *value = t * 1000;
2420 return 0;
2421 }
2422 break;
2423
2424 case TPACPI_THERMAL_NONE:
2425 default:
2426 return -ENOSYS;
2427 }
2428
2429 return -EINVAL;
2430 }
2431
2432 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2433 {
2434 int res, i;
2435 int n;
2436
2437 n = 8;
2438 i = 0;
2439
2440 if (!s)
2441 return -EINVAL;
2442
2443 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2444 n = 16;
2445
2446 for(i = 0 ; i < n; i++) {
2447 res = thermal_get_sensor(i, &s->temp[i]);
2448 if (res)
2449 return res;
2450 }
2451
2452 return n;
2453 }
2454
2455 static int thermal_read(char *p)
2456 {
2457 int len = 0;
2458 int n, i;
2459 struct ibm_thermal_sensors_struct t;
2460
2461 n = thermal_get_sensors(&t);
2462 if (unlikely(n < 0))
2463 return n;
2464
2465 len += sprintf(p + len, "temperatures:\t");
2466
2467 if (n > 0) {
2468 for (i = 0; i < (n - 1); i++)
2469 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2470 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2471 } else
2472 len += sprintf(p + len, "not supported\n");
2473
2474 return len;
2475 }
2476
2477 static struct ibm_struct thermal_driver_data = {
2478 .name = "thermal",
2479 .read = thermal_read,
2480 .exit = thermal_exit,
2481 };
2482
2483 /*************************************************************************
2484 * EC Dump subdriver
2485 */
2486
2487 static u8 ecdump_regs[256];
2488
2489 static int ecdump_read(char *p)
2490 {
2491 int len = 0;
2492 int i, j;
2493 u8 v;
2494
2495 len += sprintf(p + len, "EC "
2496 " +00 +01 +02 +03 +04 +05 +06 +07"
2497 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2498 for (i = 0; i < 256; i += 16) {
2499 len += sprintf(p + len, "EC 0x%02x:", i);
2500 for (j = 0; j < 16; j++) {
2501 if (!acpi_ec_read(i + j, &v))
2502 break;
2503 if (v != ecdump_regs[i + j])
2504 len += sprintf(p + len, " *%02x", v);
2505 else
2506 len += sprintf(p + len, " %02x", v);
2507 ecdump_regs[i + j] = v;
2508 }
2509 len += sprintf(p + len, "\n");
2510 if (j != 16)
2511 break;
2512 }
2513
2514 /* These are way too dangerous to advertise openly... */
2515 #if 0
2516 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2517 " (<offset> is 00-ff, <value> is 00-ff)\n");
2518 len += sprintf(p + len, "commands:\t0x<offset> <value> "
2519 " (<offset> is 00-ff, <value> is 0-255)\n");
2520 #endif
2521 return len;
2522 }
2523
2524 static int ecdump_write(char *buf)
2525 {
2526 char *cmd;
2527 int i, v;
2528
2529 while ((cmd = next_cmd(&buf))) {
2530 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2531 /* i and v set */
2532 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2533 /* i and v set */
2534 } else
2535 return -EINVAL;
2536 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2537 if (!acpi_ec_write(i, v))
2538 return -EIO;
2539 } else
2540 return -EINVAL;
2541 }
2542
2543 return 0;
2544 }
2545
2546 static struct ibm_struct ecdump_driver_data = {
2547 .name = "ecdump",
2548 .read = ecdump_read,
2549 .write = ecdump_write,
2550 .flags.experimental = 1,
2551 };
2552
2553 /*************************************************************************
2554 * Backlight/brightness subdriver
2555 */
2556
2557 static struct backlight_device *ibm_backlight_device = NULL;
2558
2559 static struct backlight_ops ibm_backlight_data = {
2560 .get_brightness = brightness_get,
2561 .update_status = brightness_update_status,
2562 };
2563
2564 static int __init brightness_init(struct ibm_init_struct *iibm)
2565 {
2566 int b;
2567
2568 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2569
2570 b = brightness_get(NULL);
2571 if (b < 0)
2572 return b;
2573
2574 ibm_backlight_device = backlight_device_register(
2575 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2576 &ibm_backlight_data);
2577 if (IS_ERR(ibm_backlight_device)) {
2578 printk(IBM_ERR "Could not register backlight device\n");
2579 return PTR_ERR(ibm_backlight_device);
2580 }
2581 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2582
2583 ibm_backlight_device->props.max_brightness = 7;
2584 ibm_backlight_device->props.brightness = b;
2585 backlight_update_status(ibm_backlight_device);
2586
2587 return 0;
2588 }
2589
2590 static void brightness_exit(void)
2591 {
2592 if (ibm_backlight_device) {
2593 vdbg_printk(TPACPI_DBG_EXIT,
2594 "calling backlight_device_unregister()\n");
2595 backlight_device_unregister(ibm_backlight_device);
2596 ibm_backlight_device = NULL;
2597 }
2598 }
2599
2600 static int brightness_update_status(struct backlight_device *bd)
2601 {
2602 return brightness_set(
2603 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2604 bd->props.power == FB_BLANK_UNBLANK) ?
2605 bd->props.brightness : 0);
2606 }
2607
2608 static int brightness_get(struct backlight_device *bd)
2609 {
2610 u8 level;
2611 if (!acpi_ec_read(brightness_offset, &level))
2612 return -EIO;
2613
2614 level &= 0x7;
2615
2616 return level;
2617 }
2618
2619 static int brightness_set(int value)
2620 {
2621 int cmos_cmd, inc, i;
2622 int current_value = brightness_get(NULL);
2623
2624 value &= 7;
2625
2626 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2627 inc = value > current_value ? 1 : -1;
2628 for (i = current_value; i != value; i += inc) {
2629 if (issue_thinkpad_cmos_command(cmos_cmd))
2630 return -EIO;
2631 if (!acpi_ec_write(brightness_offset, i + inc))
2632 return -EIO;
2633 }
2634
2635 return 0;
2636 }
2637
2638 static int brightness_read(char *p)
2639 {
2640 int len = 0;
2641 int level;
2642
2643 if ((level = brightness_get(NULL)) < 0) {
2644 len += sprintf(p + len, "level:\t\tunreadable\n");
2645 } else {
2646 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2647 len += sprintf(p + len, "commands:\tup, down\n");
2648 len += sprintf(p + len, "commands:\tlevel <level>"
2649 " (<level> is 0-7)\n");
2650 }
2651
2652 return len;
2653 }
2654
2655 static int brightness_write(char *buf)
2656 {
2657 int level;
2658 int new_level;
2659 char *cmd;
2660
2661 while ((cmd = next_cmd(&buf))) {
2662 if ((level = brightness_get(NULL)) < 0)
2663 return level;
2664 level &= 7;
2665
2666 if (strlencmp(cmd, "up") == 0) {
2667 new_level = level == 7 ? 7 : level + 1;
2668 } else if (strlencmp(cmd, "down") == 0) {
2669 new_level = level == 0 ? 0 : level - 1;
2670 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2671 new_level >= 0 && new_level <= 7) {
2672 /* new_level set */
2673 } else
2674 return -EINVAL;
2675
2676 brightness_set(new_level);
2677 }
2678
2679 return 0;
2680 }
2681
2682 static struct ibm_struct brightness_driver_data = {
2683 .name = "brightness",
2684 .read = brightness_read,
2685 .write = brightness_write,
2686 .exit = brightness_exit,
2687 };
2688
2689 /*************************************************************************
2690 * Volume subdriver
2691 */
2692
2693 static int volume_read(char *p)
2694 {
2695 int len = 0;
2696 u8 level;
2697
2698 if (!acpi_ec_read(volume_offset, &level)) {
2699 len += sprintf(p + len, "level:\t\tunreadable\n");
2700 } else {
2701 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2702 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2703 len += sprintf(p + len, "commands:\tup, down, mute\n");
2704 len += sprintf(p + len, "commands:\tlevel <level>"
2705 " (<level> is 0-15)\n");
2706 }
2707
2708 return len;
2709 }
2710
2711 static int volume_write(char *buf)
2712 {
2713 int cmos_cmd, inc, i;
2714 u8 level, mute;
2715 int new_level, new_mute;
2716 char *cmd;
2717
2718 while ((cmd = next_cmd(&buf))) {
2719 if (!acpi_ec_read(volume_offset, &level))
2720 return -EIO;
2721 new_mute = mute = level & 0x40;
2722 new_level = level = level & 0xf;
2723
2724 if (strlencmp(cmd, "up") == 0) {
2725 if (mute)
2726 new_mute = 0;
2727 else
2728 new_level = level == 15 ? 15 : level + 1;
2729 } else if (strlencmp(cmd, "down") == 0) {
2730 if (mute)
2731 new_mute = 0;
2732 else
2733 new_level = level == 0 ? 0 : level - 1;
2734 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2735 new_level >= 0 && new_level <= 15) {
2736 /* new_level set */
2737 } else if (strlencmp(cmd, "mute") == 0) {
2738 new_mute = 0x40;
2739 } else
2740 return -EINVAL;
2741
2742 if (new_level != level) { /* mute doesn't change */
2743 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2744 inc = new_level > level ? 1 : -1;
2745
2746 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2747 !acpi_ec_write(volume_offset, level)))
2748 return -EIO;
2749
2750 for (i = level; i != new_level; i += inc)
2751 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2752 !acpi_ec_write(volume_offset, i + inc))
2753 return -EIO;
2754
2755 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2756 !acpi_ec_write(volume_offset,
2757 new_level + mute)))
2758 return -EIO;
2759 }
2760
2761 if (new_mute != mute) { /* level doesn't change */
2762 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2763
2764 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2765 !acpi_ec_write(volume_offset, level + new_mute))
2766 return -EIO;
2767 }
2768 }
2769
2770 return 0;
2771 }
2772
2773 static struct ibm_struct volume_driver_data = {
2774 .name = "volume",
2775 .read = volume_read,
2776 .write = volume_write,
2777 };
2778
2779 /*************************************************************************
2780 * Fan subdriver
2781 */
2782
2783 /*
2784 * FAN ACCESS MODES
2785 *
2786 * TPACPI_FAN_RD_ACPI_GFAN:
2787 * ACPI GFAN method: returns fan level
2788 *
2789 * see TPACPI_FAN_WR_ACPI_SFAN
2790 * EC 0x2f (HFSP) not available if GFAN exists
2791 *
2792 * TPACPI_FAN_WR_ACPI_SFAN:
2793 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2794 *
2795 * EC 0x2f (HFSP) might be available *for reading*, but do not use
2796 * it for writing.
2797 *
2798 * TPACPI_FAN_WR_TPEC:
2799 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
2800 * Supported on almost all ThinkPads
2801 *
2802 * Fan speed changes of any sort (including those caused by the
2803 * disengaged mode) are usually done slowly by the firmware as the
2804 * maximum ammount of fan duty cycle change per second seems to be
2805 * limited.
2806 *
2807 * Reading is not available if GFAN exists.
2808 * Writing is not available if SFAN exists.
2809 *
2810 * Bits
2811 * 7 automatic mode engaged;
2812 * (default operation mode of the ThinkPad)
2813 * fan level is ignored in this mode.
2814 * 6 full speed mode (takes precedence over bit 7);
2815 * not available on all thinkpads. May disable
2816 * the tachometer while the fan controller ramps up
2817 * the speed (which can take up to a few *minutes*).
2818 * Speeds up fan to 100% duty-cycle, which is far above
2819 * the standard RPM levels. It is not impossible that
2820 * it could cause hardware damage.
2821 * 5-3 unused in some models. Extra bits for fan level
2822 * in others, but still useless as all values above
2823 * 7 map to the same speed as level 7 in these models.
2824 * 2-0 fan level (0..7 usually)
2825 * 0x00 = stop
2826 * 0x07 = max (set when temperatures critical)
2827 * Some ThinkPads may have other levels, see
2828 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2829 *
2830 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2831 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2832 * does so, its initial value is meaningless (0x07).
2833 *
2834 * For firmware bugs, refer to:
2835 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2836 *
2837 * ----
2838 *
2839 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2840 * Main fan tachometer reading (in RPM)
2841 *
2842 * This register is present on all ThinkPads with a new-style EC, and
2843 * it is known not to be present on the A21m/e, and T22, as there is
2844 * something else in offset 0x84 according to the ACPI DSDT. Other
2845 * ThinkPads from this same time period (and earlier) probably lack the
2846 * tachometer as well.
2847 *
2848 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2849 * was never fixed by IBM to report the EC firmware version string
2850 * probably support the tachometer (like the early X models), so
2851 * detecting it is quite hard. We need more data to know for sure.
2852 *
2853 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2854 * might result.
2855 *
2856 * FIRMWARE BUG: may go stale while the EC is switching to full speed
2857 * mode.
2858 *
2859 * For firmware bugs, refer to:
2860 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2861 *
2862 * TPACPI_FAN_WR_ACPI_FANS:
2863 * ThinkPad X31, X40, X41. Not available in the X60.
2864 *
2865 * FANS ACPI handle: takes three arguments: low speed, medium speed,
2866 * high speed. ACPI DSDT seems to map these three speeds to levels
2867 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2868 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2869 *
2870 * The speeds are stored on handles
2871 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2872 *
2873 * There are three default speed sets, acessible as handles:
2874 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2875 *
2876 * ACPI DSDT switches which set is in use depending on various
2877 * factors.
2878 *
2879 * TPACPI_FAN_WR_TPEC is also available and should be used to
2880 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
2881 * but the ACPI tables just mention level 7.
2882 */
2883
2884 static enum fan_status_access_mode fan_status_access_mode;
2885 static enum fan_control_access_mode fan_control_access_mode;
2886 static enum fan_control_commands fan_control_commands;
2887
2888 static u8 fan_control_initial_status;
2889 static u8 fan_control_desired_level;
2890
2891 static void fan_watchdog_fire(struct work_struct *ignored);
2892 static int fan_watchdog_maxinterval;
2893 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
2894
2895 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
2896 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
2897 "\\FSPD", /* 600e/x, 770e, 770x */
2898 ); /* all others */
2899 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
2900 "JFNS", /* 770x-JL */
2901 ); /* all others */
2902
2903 /*
2904 * SYSFS fan layout: hwmon compatible (device)
2905 *
2906 * pwm*_enable:
2907 * 0: "disengaged" mode
2908 * 1: manual mode
2909 * 2: native EC "auto" mode (recommended, hardware default)
2910 *
2911 * pwm*: set speed in manual mode, ignored otherwise.
2912 * 0 is level 0; 255 is level 7. Intermediate points done with linear
2913 * interpolation.
2914 *
2915 * fan*_input: tachometer reading, RPM
2916 *
2917 *
2918 * SYSFS fan layout: extensions
2919 *
2920 * fan_watchdog (driver):
2921 * fan watchdog interval in seconds, 0 disables (default), max 120
2922 */
2923
2924 /* sysfs fan pwm1_enable ----------------------------------------------- */
2925 static ssize_t fan_pwm1_enable_show(struct device *dev,
2926 struct device_attribute *attr,
2927 char *buf)
2928 {
2929 int res, mode;
2930 u8 status;
2931
2932 res = fan_get_status_safe(&status);
2933 if (res)
2934 return res;
2935
2936 if (unlikely(tp_features.fan_ctrl_status_undef)) {
2937 if (status != fan_control_initial_status) {
2938 tp_features.fan_ctrl_status_undef = 0;
2939 } else {
2940 /* Return most likely status. In fact, it
2941 * might be the only possible status */
2942 status = TP_EC_FAN_AUTO;
2943 }
2944 }
2945
2946 if (status & TP_EC_FAN_FULLSPEED) {
2947 mode = 0;
2948 } else if (status & TP_EC_FAN_AUTO) {
2949 mode = 2;
2950 } else
2951 mode = 1;
2952
2953 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
2954 }
2955
2956 static ssize_t fan_pwm1_enable_store(struct device *dev,
2957 struct device_attribute *attr,
2958 const char *buf, size_t count)
2959 {
2960 unsigned long t;
2961 int res, level;
2962
2963 if (parse_strtoul(buf, 2, &t))
2964 return -EINVAL;
2965
2966 switch (t) {
2967 case 0:
2968 level = TP_EC_FAN_FULLSPEED;
2969 break;
2970 case 1:
2971 level = TPACPI_FAN_LAST_LEVEL;
2972 break;
2973 case 2:
2974 level = TP_EC_FAN_AUTO;
2975 break;
2976 case 3:
2977 /* reserved for software-controlled auto mode */
2978 return -ENOSYS;
2979 default:
2980 return -EINVAL;
2981 }
2982
2983 res = fan_set_level_safe(level);
2984 if (res == -ENXIO)
2985 return -EINVAL;
2986 else if (res < 0)
2987 return res;
2988
2989 fan_watchdog_reset();
2990
2991 return count;
2992 }
2993
2994 static struct device_attribute dev_attr_fan_pwm1_enable =
2995 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
2996 fan_pwm1_enable_show, fan_pwm1_enable_store);
2997
2998 /* sysfs fan pwm1 ------------------------------------------------------ */
2999 static ssize_t fan_pwm1_show(struct device *dev,
3000 struct device_attribute *attr,
3001 char *buf)
3002 {
3003 int res;
3004 u8 status;
3005
3006 res = fan_get_status_safe(&status);
3007 if (res)
3008 return res;
3009
3010 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3011 if (status != fan_control_initial_status) {
3012 tp_features.fan_ctrl_status_undef = 0;
3013 } else {
3014 status = TP_EC_FAN_AUTO;
3015 }
3016 }
3017
3018 if ((status &
3019 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3020 status = fan_control_desired_level;
3021
3022 if (status > 7)
3023 status = 7;
3024
3025 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3026 }
3027
3028 static ssize_t fan_pwm1_store(struct device *dev,
3029 struct device_attribute *attr,
3030 const char *buf, size_t count)
3031 {
3032 unsigned long s;
3033 int rc;
3034 u8 status, newlevel;
3035
3036 if (parse_strtoul(buf, 255, &s))
3037 return -EINVAL;
3038
3039 /* scale down from 0-255 to 0-7 */
3040 newlevel = (s >> 5) & 0x07;
3041
3042 rc = mutex_lock_interruptible(&fan_mutex);
3043 if (rc < 0)
3044 return rc;
3045
3046 rc = fan_get_status(&status);
3047 if (!rc && (status &
3048 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3049 rc = fan_set_level(newlevel);
3050 if (rc == -ENXIO)
3051 rc = -EINVAL;
3052 else if (!rc) {
3053 fan_update_desired_level(newlevel);
3054 fan_watchdog_reset();
3055 }
3056 }
3057
3058 mutex_unlock(&fan_mutex);
3059 return (rc)? rc : count;
3060 }
3061
3062 static struct device_attribute dev_attr_fan_pwm1 =
3063 __ATTR(pwm1, S_IWUSR | S_IRUGO,
3064 fan_pwm1_show, fan_pwm1_store);
3065
3066 /* sysfs fan fan1_input ------------------------------------------------ */
3067 static ssize_t fan_fan1_input_show(struct device *dev,
3068 struct device_attribute *attr,
3069 char *buf)
3070 {
3071 int res;
3072 unsigned int speed;
3073
3074 res = fan_get_speed(&speed);
3075 if (res < 0)
3076 return res;
3077
3078 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3079 }
3080
3081 static struct device_attribute dev_attr_fan_fan1_input =
3082 __ATTR(fan1_input, S_IRUGO,
3083 fan_fan1_input_show, NULL);
3084
3085 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3086 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3087 char *buf)
3088 {
3089 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3090 }
3091
3092 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3093 const char *buf, size_t count)
3094 {
3095 unsigned long t;
3096
3097 if (parse_strtoul(buf, 120, &t))
3098 return -EINVAL;
3099
3100 if (!fan_control_allowed)
3101 return -EPERM;
3102
3103 fan_watchdog_maxinterval = t;
3104 fan_watchdog_reset();
3105
3106 return count;
3107 }
3108
3109 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3110 fan_fan_watchdog_show, fan_fan_watchdog_store);
3111
3112 /* --------------------------------------------------------------------- */
3113 static struct attribute *fan_attributes[] = {
3114 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3115 &dev_attr_fan_fan1_input.attr,
3116 NULL
3117 };
3118
3119 static const struct attribute_group fan_attr_group = {
3120 .attrs = fan_attributes,
3121 };
3122
3123 static int __init fan_init(struct ibm_init_struct *iibm)
3124 {
3125 int rc;
3126
3127 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3128
3129 mutex_init(&fan_mutex);
3130 fan_status_access_mode = TPACPI_FAN_NONE;
3131 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3132 fan_control_commands = 0;
3133 fan_watchdog_maxinterval = 0;
3134 tp_features.fan_ctrl_status_undef = 0;
3135 fan_control_desired_level = 7;
3136
3137 IBM_ACPIHANDLE_INIT(fans);
3138 IBM_ACPIHANDLE_INIT(gfan);
3139 IBM_ACPIHANDLE_INIT(sfan);
3140
3141 if (gfan_handle) {
3142 /* 570, 600e/x, 770e, 770x */
3143 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3144 } else {
3145 /* all other ThinkPads: note that even old-style
3146 * ThinkPad ECs supports the fan control register */
3147 if (likely(acpi_ec_read(fan_status_offset,
3148 &fan_control_initial_status))) {
3149 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3150
3151 /* In some ThinkPads, neither the EC nor the ACPI
3152 * DSDT initialize the fan status, and it ends up
3153 * being set to 0x07 when it *could* be either
3154 * 0x07 or 0x80.
3155 *
3156 * Enable for TP-1Y (T43), TP-78 (R51e),
3157 * TP-76 (R52), TP-70 (T43, R52), which are known
3158 * to be buggy. */
3159 if (fan_control_initial_status == 0x07 &&
3160 ibm_thinkpad_ec_found &&
3161 ((ibm_thinkpad_ec_found[0] == '1' &&
3162 ibm_thinkpad_ec_found[1] == 'Y') ||
3163 (ibm_thinkpad_ec_found[0] == '7' &&
3164 (ibm_thinkpad_ec_found[1] == '6' ||
3165 ibm_thinkpad_ec_found[1] == '8' ||
3166 ibm_thinkpad_ec_found[1] == '0'))
3167 )) {
3168 printk(IBM_NOTICE
3169 "fan_init: initial fan status is "
3170 "unknown, assuming it is in auto "
3171 "mode\n");
3172 tp_features.fan_ctrl_status_undef = 1;
3173 }
3174 } else {
3175 printk(IBM_ERR
3176 "ThinkPad ACPI EC access misbehaving, "
3177 "fan status and control unavailable\n");
3178 return 1;
3179 }
3180 }
3181
3182 if (sfan_handle) {
3183 /* 570, 770x-JL */
3184 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3185 fan_control_commands |=
3186 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3187 } else {
3188 if (!gfan_handle) {
3189 /* gfan without sfan means no fan control */
3190 /* all other models implement TP EC 0x2f control */
3191
3192 if (fans_handle) {
3193 /* X31, X40, X41 */
3194 fan_control_access_mode =
3195 TPACPI_FAN_WR_ACPI_FANS;
3196 fan_control_commands |=
3197 TPACPI_FAN_CMD_SPEED |
3198 TPACPI_FAN_CMD_LEVEL |
3199 TPACPI_FAN_CMD_ENABLE;
3200 } else {
3201 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3202 fan_control_commands |=
3203 TPACPI_FAN_CMD_LEVEL |
3204 TPACPI_FAN_CMD_ENABLE;
3205 }
3206 }
3207 }
3208
3209 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3210 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3211 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3212 fan_status_access_mode, fan_control_access_mode);
3213
3214 /* fan control master switch */
3215 if (!fan_control_allowed) {
3216 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3217 fan_control_commands = 0;
3218 dbg_printk(TPACPI_DBG_INIT,
3219 "fan control features disabled by parameter\n");
3220 }
3221
3222 /* update fan_control_desired_level */
3223 if (fan_status_access_mode != TPACPI_FAN_NONE)
3224 fan_get_status_safe(NULL);
3225
3226 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3227 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3228 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3229 &fan_attr_group);
3230 if (!(rc < 0))
3231 rc = driver_create_file(&tpacpi_pdriver.driver,
3232 &driver_attr_fan_watchdog);
3233 if (rc < 0)
3234 return rc;
3235 return 0;
3236 } else
3237 return 1;
3238 }
3239
3240 /*
3241 * Call with fan_mutex held
3242 */
3243 static void fan_update_desired_level(u8 status)
3244 {
3245 if ((status &
3246 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3247 if (status > 7)
3248 fan_control_desired_level = 7;
3249 else
3250 fan_control_desired_level = status;
3251 }
3252 }
3253
3254 static int fan_get_status(u8 *status)
3255 {
3256 u8 s;
3257
3258 /* TODO:
3259 * Add TPACPI_FAN_RD_ACPI_FANS ? */
3260
3261 switch (fan_status_access_mode) {
3262 case TPACPI_FAN_RD_ACPI_GFAN:
3263 /* 570, 600e/x, 770e, 770x */
3264
3265 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3266 return -EIO;
3267
3268 if (likely(status))
3269 *status = s & 0x07;
3270
3271 break;
3272
3273 case TPACPI_FAN_RD_TPEC:
3274 /* all except 570, 600e/x, 770e, 770x */
3275 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3276 return -EIO;
3277
3278 if (likely(status))
3279 *status = s;
3280
3281 break;
3282
3283 default:
3284 return -ENXIO;
3285 }
3286
3287 return 0;
3288 }
3289
3290 static int fan_get_status_safe(u8 *status)
3291 {
3292 int rc;
3293 u8 s;
3294
3295 rc = mutex_lock_interruptible(&fan_mutex);
3296 if (rc < 0)
3297 return rc;
3298 rc = fan_get_status(&s);
3299 if (!rc)
3300 fan_update_desired_level(s);
3301 mutex_unlock(&fan_mutex);
3302
3303 if (status)
3304 *status = s;
3305
3306 return rc;
3307 }
3308
3309 static void fan_exit(void)
3310 {
3311 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3312
3313 /* FIXME: can we really do this unconditionally? */
3314 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3315 driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3316
3317 cancel_delayed_work(&fan_watchdog_task);
3318 flush_scheduled_work();
3319 }
3320
3321 static int fan_get_speed(unsigned int *speed)
3322 {
3323 u8 hi, lo;
3324
3325 switch (fan_status_access_mode) {
3326 case TPACPI_FAN_RD_TPEC:
3327 /* all except 570, 600e/x, 770e, 770x */
3328 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3329 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3330 return -EIO;
3331
3332 if (likely(speed))
3333 *speed = (hi << 8) | lo;
3334
3335 break;
3336
3337 default:
3338 return -ENXIO;
3339 }
3340
3341 return 0;
3342 }
3343
3344 static void fan_watchdog_fire(struct work_struct *ignored)
3345 {
3346 int rc;
3347
3348 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3349 rc = fan_set_enable();
3350 if (rc < 0) {
3351 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3352 "will try again later...\n", -rc);
3353 /* reschedule for later */
3354 fan_watchdog_reset();
3355 }
3356 }
3357
3358 static void fan_watchdog_reset(void)
3359 {
3360 static int fan_watchdog_active = 0;
3361
3362 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3363 return;
3364
3365 if (fan_watchdog_active)
3366 cancel_delayed_work(&fan_watchdog_task);
3367
3368 if (fan_watchdog_maxinterval > 0) {
3369 fan_watchdog_active = 1;
3370 if (!schedule_delayed_work(&fan_watchdog_task,
3371 msecs_to_jiffies(fan_watchdog_maxinterval
3372 * 1000))) {
3373 printk(IBM_ERR "failed to schedule the fan watchdog, "
3374 "watchdog will not trigger\n");
3375 }
3376 } else
3377 fan_watchdog_active = 0;
3378 }
3379
3380 static int fan_set_level(int level)
3381 {
3382 if (!fan_control_allowed)
3383 return -EPERM;
3384
3385 switch (fan_control_access_mode) {
3386 case TPACPI_FAN_WR_ACPI_SFAN:
3387 if (level >= 0 && level <= 7) {
3388 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3389 return -EIO;
3390 } else
3391 return -EINVAL;
3392 break;
3393
3394 case TPACPI_FAN_WR_ACPI_FANS:
3395 case TPACPI_FAN_WR_TPEC:
3396 if ((level != TP_EC_FAN_AUTO) &&
3397 (level != TP_EC_FAN_FULLSPEED) &&
3398 ((level < 0) || (level > 7)))
3399 return -EINVAL;
3400
3401 /* safety net should the EC not support AUTO
3402 * or FULLSPEED mode bits and just ignore them */
3403 if (level & TP_EC_FAN_FULLSPEED)
3404 level |= 7; /* safety min speed 7 */
3405 else if (level & TP_EC_FAN_FULLSPEED)
3406 level |= 4; /* safety min speed 4 */
3407
3408 if (!acpi_ec_write(fan_status_offset, level))
3409 return -EIO;
3410 else
3411 tp_features.fan_ctrl_status_undef = 0;
3412 break;
3413
3414 default:
3415 return -ENXIO;
3416 }
3417 return 0;
3418 }
3419
3420 static int fan_set_level_safe(int level)
3421 {
3422 int rc;
3423
3424 if (!fan_control_allowed)
3425 return -EPERM;
3426
3427 rc = mutex_lock_interruptible(&fan_mutex);
3428 if (rc < 0)
3429 return rc;
3430
3431 if (level == TPACPI_FAN_LAST_LEVEL)
3432 level = fan_control_desired_level;
3433
3434 rc = fan_set_level(level);
3435 if (!rc)
3436 fan_update_desired_level(level);
3437
3438 mutex_unlock(&fan_mutex);
3439 return rc;
3440 }
3441
3442 static int fan_set_enable(void)
3443 {
3444 u8 s;
3445 int rc;
3446
3447 if (!fan_control_allowed)
3448 return -EPERM;
3449
3450 rc = mutex_lock_interruptible(&fan_mutex);
3451 if (rc < 0)
3452 return rc;
3453
3454 switch (fan_control_access_mode) {
3455 case TPACPI_FAN_WR_ACPI_FANS:
3456 case TPACPI_FAN_WR_TPEC:
3457 rc = fan_get_status(&s);
3458 if (rc < 0)
3459 break;
3460
3461 /* Don't go out of emergency fan mode */
3462 if (s != 7) {
3463 s &= 0x07;
3464 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3465 }
3466
3467 if (!acpi_ec_write(fan_status_offset, s))
3468 rc = -EIO;
3469 else {
3470 tp_features.fan_ctrl_status_undef = 0;
3471 rc = 0;
3472 }
3473 break;
3474
3475 case TPACPI_FAN_WR_ACPI_SFAN:
3476 rc = fan_get_status(&s);
3477 if (rc < 0)
3478 break;
3479
3480 s &= 0x07;
3481
3482 /* Set fan to at least level 4 */
3483 s |= 4;
3484
3485 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3486 rc= -EIO;
3487 else
3488 rc = 0;
3489 break;
3490
3491 default:
3492 rc = -ENXIO;
3493 }
3494
3495 mutex_unlock(&fan_mutex);
3496 return rc;
3497 }
3498
3499 static int fan_set_disable(void)
3500 {
3501 int rc;
3502
3503 if (!fan_control_allowed)
3504 return -EPERM;
3505
3506 rc = mutex_lock_interruptible(&fan_mutex);
3507 if (rc < 0)
3508 return rc;
3509
3510 rc = 0;
3511 switch (fan_control_access_mode) {
3512 case TPACPI_FAN_WR_ACPI_FANS:
3513 case TPACPI_FAN_WR_TPEC:
3514 if (!acpi_ec_write(fan_status_offset, 0x00))
3515 rc = -EIO;
3516 else {
3517 fan_control_desired_level = 0;
3518 tp_features.fan_ctrl_status_undef = 0;
3519 }
3520 break;
3521
3522 case TPACPI_FAN_WR_ACPI_SFAN:
3523 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
3524 rc = -EIO;
3525 else
3526 fan_control_desired_level = 0;
3527 break;
3528
3529 default:
3530 rc = -ENXIO;
3531 }
3532
3533
3534 mutex_unlock(&fan_mutex);
3535 return rc;
3536 }
3537
3538 static int fan_set_speed(int speed)
3539 {
3540 int rc;
3541
3542 if (!fan_control_allowed)
3543 return -EPERM;
3544
3545 rc = mutex_lock_interruptible(&fan_mutex);
3546 if (rc < 0)
3547 return rc;
3548
3549 rc = 0;
3550 switch (fan_control_access_mode) {
3551 case TPACPI_FAN_WR_ACPI_FANS:
3552 if (speed >= 0 && speed <= 65535) {
3553 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3554 speed, speed, speed))
3555 rc = -EIO;
3556 } else
3557 rc = -EINVAL;
3558 break;
3559
3560 default:
3561 rc = -ENXIO;
3562 }
3563
3564 mutex_unlock(&fan_mutex);
3565 return rc;
3566 }
3567
3568 static int fan_read(char *p)
3569 {
3570 int len = 0;
3571 int rc;
3572 u8 status;
3573 unsigned int speed = 0;
3574
3575 switch (fan_status_access_mode) {
3576 case TPACPI_FAN_RD_ACPI_GFAN:
3577 /* 570, 600e/x, 770e, 770x */
3578 if ((rc = fan_get_status_safe(&status)) < 0)
3579 return rc;
3580
3581 len += sprintf(p + len, "status:\t\t%s\n"
3582 "level:\t\t%d\n",
3583 (status != 0) ? "enabled" : "disabled", status);
3584 break;
3585
3586 case TPACPI_FAN_RD_TPEC:
3587 /* all except 570, 600e/x, 770e, 770x */
3588 if ((rc = fan_get_status_safe(&status)) < 0)
3589 return rc;
3590
3591 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3592 if (status != fan_control_initial_status)
3593 tp_features.fan_ctrl_status_undef = 0;
3594 else
3595 /* Return most likely status. In fact, it
3596 * might be the only possible status */
3597 status = TP_EC_FAN_AUTO;
3598 }
3599
3600 len += sprintf(p + len, "status:\t\t%s\n",
3601 (status != 0) ? "enabled" : "disabled");
3602
3603 if ((rc = fan_get_speed(&speed)) < 0)
3604 return rc;
3605
3606 len += sprintf(p + len, "speed:\t\t%d\n", speed);
3607
3608 if (status & TP_EC_FAN_FULLSPEED)
3609 /* Disengaged mode takes precedence */
3610 len += sprintf(p + len, "level:\t\tdisengaged\n");
3611 else if (status & TP_EC_FAN_AUTO)
3612 len += sprintf(p + len, "level:\t\tauto\n");
3613 else
3614 len += sprintf(p + len, "level:\t\t%d\n", status);
3615 break;
3616
3617 case TPACPI_FAN_NONE:
3618 default:
3619 len += sprintf(p + len, "status:\t\tnot supported\n");
3620 }
3621
3622 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
3623 len += sprintf(p + len, "commands:\tlevel <level>");
3624
3625 switch (fan_control_access_mode) {
3626 case TPACPI_FAN_WR_ACPI_SFAN:
3627 len += sprintf(p + len, " (<level> is 0-7)\n");
3628 break;
3629
3630 default:
3631 len += sprintf(p + len, " (<level> is 0-7, "
3632 "auto, disengaged, full-speed)\n");
3633 break;
3634 }
3635 }
3636
3637 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
3638 len += sprintf(p + len, "commands:\tenable, disable\n"
3639 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
3640 "1-120 (seconds))\n");
3641
3642 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
3643 len += sprintf(p + len, "commands:\tspeed <speed>"
3644 " (<speed> is 0-65535)\n");
3645
3646 return len;
3647 }
3648
3649 static int fan_write_cmd_level(const char *cmd, int *rc)
3650 {
3651 int level;
3652
3653 if (strlencmp(cmd, "level auto") == 0)
3654 level = TP_EC_FAN_AUTO;
3655 else if ((strlencmp(cmd, "level disengaged") == 0) |
3656 (strlencmp(cmd, "level full-speed") == 0))
3657 level = TP_EC_FAN_FULLSPEED;
3658 else if (sscanf(cmd, "level %d", &level) != 1)
3659 return 0;
3660
3661 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
3662 printk(IBM_ERR "level command accepted for unsupported "
3663 "access mode %d", fan_control_access_mode);
3664
3665 return 1;
3666 }
3667
3668 static int fan_write_cmd_enable(const char *cmd, int *rc)
3669 {
3670 if (strlencmp(cmd, "enable") != 0)
3671 return 0;
3672
3673 if ((*rc = fan_set_enable()) == -ENXIO)
3674 printk(IBM_ERR "enable command accepted for unsupported "
3675 "access mode %d", fan_control_access_mode);
3676
3677 return 1;
3678 }
3679
3680 static int fan_write_cmd_disable(const char *cmd, int *rc)
3681 {
3682 if (strlencmp(cmd, "disable") != 0)
3683 return 0;
3684
3685 if ((*rc = fan_set_disable()) == -ENXIO)
3686 printk(IBM_ERR "disable command accepted for unsupported "
3687 "access mode %d", fan_control_access_mode);
3688
3689 return 1;
3690 }
3691
3692 static int fan_write_cmd_speed(const char *cmd, int *rc)
3693 {
3694 int speed;
3695
3696 /* TODO:
3697 * Support speed <low> <medium> <high> ? */
3698
3699 if (sscanf(cmd, "speed %d", &speed) != 1)
3700 return 0;
3701
3702 if ((*rc = fan_set_speed(speed)) == -ENXIO)
3703 printk(IBM_ERR "speed command accepted for unsupported "
3704 "access mode %d", fan_control_access_mode);
3705
3706 return 1;
3707 }
3708
3709 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
3710 {
3711 int interval;
3712
3713 if (sscanf(cmd, "watchdog %d", &interval) != 1)
3714 return 0;
3715
3716 if (interval < 0 || interval > 120)
3717 *rc = -EINVAL;
3718 else
3719 fan_watchdog_maxinterval = interval;
3720
3721 return 1;
3722 }
3723
3724 static int fan_write(char *buf)
3725 {
3726 char *cmd;
3727 int rc = 0;
3728
3729 while (!rc && (cmd = next_cmd(&buf))) {
3730 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
3731 fan_write_cmd_level(cmd, &rc)) &&
3732 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
3733 (fan_write_cmd_enable(cmd, &rc) ||
3734 fan_write_cmd_disable(cmd, &rc) ||
3735 fan_write_cmd_watchdog(cmd, &rc))) &&
3736 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
3737 fan_write_cmd_speed(cmd, &rc))
3738 )
3739 rc = -EINVAL;
3740 else if (!rc)
3741 fan_watchdog_reset();
3742 }
3743
3744 return rc;
3745 }
3746
3747 static struct ibm_struct fan_driver_data = {
3748 .name = "fan",
3749 .read = fan_read,
3750 .write = fan_write,
3751 .exit = fan_exit,
3752 };
3753
3754 /****************************************************************************
3755 ****************************************************************************
3756 *
3757 * Infrastructure
3758 *
3759 ****************************************************************************
3760 ****************************************************************************/
3761
3762 /* /proc support */
3763 static struct proc_dir_entry *proc_dir = NULL;
3764
3765 /* Subdriver registry */
3766 static LIST_HEAD(tpacpi_all_drivers);
3767
3768
3769 /*
3770 * Module and infrastructure proble, init and exit handling
3771 */
3772
3773 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
3774 static const char * __init str_supported(int is_supported)
3775 {
3776 static char text_unsupported[] __initdata = "not supported";
3777
3778 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
3779 }
3780 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3781
3782 static int __init ibm_init(struct ibm_init_struct *iibm)
3783 {
3784 int ret;
3785 struct ibm_struct *ibm = iibm->data;
3786 struct proc_dir_entry *entry;
3787
3788 BUG_ON(ibm == NULL);
3789
3790 INIT_LIST_HEAD(&ibm->all_drivers);
3791
3792 if (ibm->flags.experimental && !experimental)
3793 return 0;
3794
3795 dbg_printk(TPACPI_DBG_INIT,
3796 "probing for %s\n", ibm->name);
3797
3798 if (iibm->init) {
3799 ret = iibm->init(iibm);
3800 if (ret > 0)
3801 return 0; /* probe failed */
3802 if (ret)
3803 return ret;
3804
3805 ibm->flags.init_called = 1;
3806 }
3807
3808 if (ibm->acpi) {
3809 if (ibm->acpi->hid) {
3810 ret = register_tpacpi_subdriver(ibm);
3811 if (ret)
3812 goto err_out;
3813 }
3814
3815 if (ibm->acpi->notify) {
3816 ret = setup_acpi_notify(ibm);
3817 if (ret == -ENODEV) {
3818 printk(IBM_NOTICE "disabling subdriver %s\n",
3819 ibm->name);
3820 ret = 0;
3821 goto err_out;
3822 }
3823 if (ret < 0)
3824 goto err_out;
3825 }
3826 }
3827
3828 dbg_printk(TPACPI_DBG_INIT,
3829 "%s installed\n", ibm->name);
3830
3831 if (ibm->read) {
3832 entry = create_proc_entry(ibm->name,
3833 S_IFREG | S_IRUGO | S_IWUSR,
3834 proc_dir);
3835 if (!entry) {
3836 printk(IBM_ERR "unable to create proc entry %s\n",
3837 ibm->name);
3838 ret = -ENODEV;
3839 goto err_out;
3840 }
3841 entry->owner = THIS_MODULE;
3842 entry->data = ibm;
3843 entry->read_proc = &dispatch_procfs_read;
3844 if (ibm->write)
3845 entry->write_proc = &dispatch_procfs_write;
3846 ibm->flags.proc_created = 1;
3847 }
3848
3849 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
3850
3851 return 0;
3852
3853 err_out:
3854 dbg_printk(TPACPI_DBG_INIT,
3855 "%s: at error exit path with result %d\n",
3856 ibm->name, ret);
3857
3858 ibm_exit(ibm);
3859 return (ret < 0)? ret : 0;
3860 }
3861
3862 static void ibm_exit(struct ibm_struct *ibm)
3863 {
3864 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
3865
3866 list_del_init(&ibm->all_drivers);
3867
3868 if (ibm->flags.acpi_notify_installed) {
3869 dbg_printk(TPACPI_DBG_EXIT,
3870 "%s: acpi_remove_notify_handler\n", ibm->name);
3871 BUG_ON(!ibm->acpi);
3872 acpi_remove_notify_handler(*ibm->acpi->handle,
3873 ibm->acpi->type,
3874 dispatch_acpi_notify);
3875 ibm->flags.acpi_notify_installed = 0;
3876 ibm->flags.acpi_notify_installed = 0;
3877 }
3878
3879 if (ibm->flags.proc_created) {
3880 dbg_printk(TPACPI_DBG_EXIT,
3881 "%s: remove_proc_entry\n", ibm->name);
3882 remove_proc_entry(ibm->name, proc_dir);
3883 ibm->flags.proc_created = 0;
3884 }
3885
3886 if (ibm->flags.acpi_driver_registered) {
3887 dbg_printk(TPACPI_DBG_EXIT,
3888 "%s: acpi_bus_unregister_driver\n", ibm->name);
3889 BUG_ON(!ibm->acpi);
3890 acpi_bus_unregister_driver(ibm->acpi->driver);
3891 kfree(ibm->acpi->driver);
3892 ibm->acpi->driver = NULL;
3893 ibm->flags.acpi_driver_registered = 0;
3894 }
3895
3896 if (ibm->flags.init_called && ibm->exit) {
3897 ibm->exit();
3898 ibm->flags.init_called = 0;
3899 }
3900
3901 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
3902 }
3903
3904 /* Probing */
3905
3906 static char *ibm_thinkpad_ec_found = NULL;
3907
3908 static char* __init check_dmi_for_ec(void)
3909 {
3910 struct dmi_device *dev = NULL;
3911 char ec_fw_string[18];
3912
3913 /*
3914 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
3915 * X32 or newer, all Z series; Some models must have an
3916 * up-to-date BIOS or they will not be detected.
3917 *
3918 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
3919 */
3920 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
3921 if (sscanf(dev->name,
3922 "IBM ThinkPad Embedded Controller -[%17c",
3923 ec_fw_string) == 1) {
3924 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
3925 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
3926 return kstrdup(ec_fw_string, GFP_KERNEL);
3927 }
3928 }
3929 return NULL;
3930 }
3931
3932 static int __init probe_for_thinkpad(void)
3933 {
3934 int is_thinkpad;
3935
3936 if (acpi_disabled)
3937 return -ENODEV;
3938
3939 /*
3940 * Non-ancient models have better DMI tagging, but very old models
3941 * don't.
3942 */
3943 is_thinkpad = dmi_name_in_vendors("ThinkPad");
3944
3945 /* ec is required because many other handles are relative to it */
3946 IBM_ACPIHANDLE_INIT(ec);
3947 if (!ec_handle) {
3948 if (is_thinkpad)
3949 printk(IBM_ERR
3950 "Not yet supported ThinkPad detected!\n");
3951 return -ENODEV;
3952 }
3953
3954 /*
3955 * Risks a regression on very old machines, but reduces potential
3956 * false positives a damn great deal
3957 */
3958 if (!is_thinkpad)
3959 is_thinkpad = dmi_name_in_vendors("IBM");
3960
3961 if (!is_thinkpad && !force_load)
3962 return -ENODEV;
3963
3964 return 0;
3965 }
3966
3967
3968 /* Module init, exit, parameters */
3969
3970 static struct ibm_init_struct ibms_init[] __initdata = {
3971 {
3972 .init = thinkpad_acpi_driver_init,
3973 .data = &thinkpad_acpi_driver_data,
3974 },
3975 {
3976 .init = hotkey_init,
3977 .data = &hotkey_driver_data,
3978 },
3979 {
3980 .init = bluetooth_init,
3981 .data = &bluetooth_driver_data,
3982 },
3983 {
3984 .init = wan_init,
3985 .data = &wan_driver_data,
3986 },
3987 {
3988 .init = video_init,
3989 .data = &video_driver_data,
3990 },
3991 {
3992 .init = light_init,
3993 .data = &light_driver_data,
3994 },
3995 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3996 {
3997 .init = dock_init,
3998 .data = &dock_driver_data[0],
3999 },
4000 {
4001 .init = dock_init2,
4002 .data = &dock_driver_data[1],
4003 },
4004 #endif
4005 #ifdef CONFIG_THINKPAD_ACPI_BAY
4006 {
4007 .init = bay_init,
4008 .data = &bay_driver_data,
4009 },
4010 #endif
4011 {
4012 .init = cmos_init,
4013 .data = &cmos_driver_data,
4014 },
4015 {
4016 .init = led_init,
4017 .data = &led_driver_data,
4018 },
4019 {
4020 .init = beep_init,
4021 .data = &beep_driver_data,
4022 },
4023 {
4024 .init = thermal_init,
4025 .data = &thermal_driver_data,
4026 },
4027 {
4028 .data = &ecdump_driver_data,
4029 },
4030 {
4031 .init = brightness_init,
4032 .data = &brightness_driver_data,
4033 },
4034 {
4035 .data = &volume_driver_data,
4036 },
4037 {
4038 .init = fan_init,
4039 .data = &fan_driver_data,
4040 },
4041 };
4042
4043 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4044 {
4045 unsigned int i;
4046 struct ibm_struct *ibm;
4047
4048 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4049 ibm = ibms_init[i].data;
4050 BUG_ON(ibm == NULL);
4051
4052 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4053 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4054 return -ENOSPC;
4055 strcpy(ibms_init[i].param, val);
4056 strcat(ibms_init[i].param, ",");
4057 return 0;
4058 }
4059 }
4060
4061 return -EINVAL;
4062 }
4063
4064 static int experimental;
4065 module_param(experimental, int, 0);
4066
4067 static u32 dbg_level;
4068 module_param_named(debug, dbg_level, uint, 0);
4069
4070 static int force_load;
4071 module_param(force_load, int, 0);
4072
4073 static int fan_control_allowed;
4074 module_param_named(fan_control, fan_control_allowed, int, 0);
4075
4076 #define IBM_PARAM(feature) \
4077 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4078
4079 IBM_PARAM(hotkey);
4080 IBM_PARAM(bluetooth);
4081 IBM_PARAM(video);
4082 IBM_PARAM(light);
4083 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4084 IBM_PARAM(dock);
4085 #endif
4086 #ifdef CONFIG_THINKPAD_ACPI_BAY
4087 IBM_PARAM(bay);
4088 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4089 IBM_PARAM(cmos);
4090 IBM_PARAM(led);
4091 IBM_PARAM(beep);
4092 IBM_PARAM(ecdump);
4093 IBM_PARAM(brightness);
4094 IBM_PARAM(volume);
4095 IBM_PARAM(fan);
4096
4097 static int __init thinkpad_acpi_module_init(void)
4098 {
4099 int ret, i;
4100
4101 /* Driver-level probe */
4102 ret = probe_for_thinkpad();
4103 if (ret)
4104 return ret;
4105
4106 /* Driver initialization */
4107 ibm_thinkpad_ec_found = check_dmi_for_ec();
4108 IBM_ACPIHANDLE_INIT(ecrd);
4109 IBM_ACPIHANDLE_INIT(ecwr);
4110
4111 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4112 if (!proc_dir) {
4113 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4114 thinkpad_acpi_module_exit();
4115 return -ENODEV;
4116 }
4117 proc_dir->owner = THIS_MODULE;
4118
4119 ret = platform_driver_register(&tpacpi_pdriver);
4120 if (ret) {
4121 printk(IBM_ERR "unable to register platform driver\n");
4122 thinkpad_acpi_module_exit();
4123 return ret;
4124 }
4125 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4126 if (ret) {
4127 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4128 thinkpad_acpi_module_exit();
4129 return ret;
4130 }
4131
4132
4133 /* Device initialization */
4134 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4135 NULL, 0);
4136 if (IS_ERR(tpacpi_pdev)) {
4137 ret = PTR_ERR(tpacpi_pdev);
4138 tpacpi_pdev = NULL;
4139 printk(IBM_ERR "unable to register platform device\n");
4140 thinkpad_acpi_module_exit();
4141 return ret;
4142 }
4143 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4144 if (IS_ERR(tpacpi_hwmon)) {
4145 ret = PTR_ERR(tpacpi_hwmon);
4146 tpacpi_hwmon = NULL;
4147 printk(IBM_ERR "unable to register hwmon device\n");
4148 thinkpad_acpi_module_exit();
4149 return ret;
4150 }
4151 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4152 ret = ibm_init(&ibms_init[i]);
4153 if (ret >= 0 && *ibms_init[i].param)
4154 ret = ibms_init[i].data->write(ibms_init[i].param);
4155 if (ret < 0) {
4156 thinkpad_acpi_module_exit();
4157 return ret;
4158 }
4159 }
4160
4161 return 0;
4162 }
4163
4164 static void thinkpad_acpi_module_exit(void)
4165 {
4166 struct ibm_struct *ibm, *itmp;
4167
4168 list_for_each_entry_safe_reverse(ibm, itmp,
4169 &tpacpi_all_drivers,
4170 all_drivers) {
4171 ibm_exit(ibm);
4172 }
4173
4174 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4175
4176 if (tpacpi_hwmon)
4177 hwmon_device_unregister(tpacpi_hwmon);
4178
4179 if (tpacpi_pdev)
4180 platform_device_unregister(tpacpi_pdev);
4181
4182 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4183 platform_driver_unregister(&tpacpi_pdriver);
4184
4185 if (proc_dir)
4186 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4187
4188 kfree(ibm_thinkpad_ec_found);
4189 }
4190
4191 module_init(thinkpad_acpi_module_init);
4192 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree