?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ACPI: thinkpad-acpi: checkpoint sysfs interface version due to hotkey
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blob3fa5903cea45b16c70f07f7e2e89f77caf70ab37
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 0x000200
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 /*
96 * DMI matching for module autoloading
97 *
98 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
99 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
100 *
101 * Only models listed in thinkwiki will be supported, so add yours
102 * if it is not there yet.
103 */
104 #define IBM_BIOS_MODULE_ALIAS(__type) \
105 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
106
107 /* Non-ancient thinkpads */
108 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
109 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
110
111 /* Ancient thinkpad BIOSes have to be identified by
112 * BIOS type or model number, and there are far less
113 * BIOS types than model numbers... */
114 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
115 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
116 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
117
118 #define __unused __attribute__ ((unused))
119
120 /****************************************************************************
121 ****************************************************************************
122 *
123 * ACPI Helpers and device model
124 *
125 ****************************************************************************
126 ****************************************************************************/
127
128 /*************************************************************************
129 * ACPI basic handles
130 */
131
132 static acpi_handle root_handle;
133
134 #define IBM_HANDLE(object, parent, paths...) \
135 static acpi_handle object##_handle; \
136 static acpi_handle *object##_parent = &parent##_handle; \
137 static char *object##_path; \
138 static char *object##_paths[] = { paths }
139
140 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
141 "\\_SB.PCI.ISA.EC", /* 570 */
142 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
143 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
144 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
145 "\\_SB.PCI0.ICH3.EC0", /* R31 */
146 "\\_SB.PCI0.LPC.EC", /* all others */
147 );
148
149 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
150 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
151
152
153 /*************************************************************************
154 * Misc ACPI handles
155 */
156
157 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
158 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
159 "\\CMS", /* R40, R40e */
160 ); /* all others */
161
162 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
163 "^HKEY", /* R30, R31 */
164 "HKEY", /* all others */
165 ); /* 570 */
166
167
168 /*************************************************************************
169 * ACPI helpers
170 */
171
172 static int acpi_evalf(acpi_handle handle,
173 void *res, char *method, char *fmt, ...)
174 {
175 char *fmt0 = fmt;
176 struct acpi_object_list params;
177 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
178 struct acpi_buffer result, *resultp;
179 union acpi_object out_obj;
180 acpi_status status;
181 va_list ap;
182 char res_type;
183 int success;
184 int quiet;
185
186 if (!*fmt) {
187 printk(IBM_ERR "acpi_evalf() called with empty format\n");
188 return 0;
189 }
190
191 if (*fmt == 'q') {
192 quiet = 1;
193 fmt++;
194 } else
195 quiet = 0;
196
197 res_type = *(fmt++);
198
199 params.count = 0;
200 params.pointer = &in_objs[0];
201
202 va_start(ap, fmt);
203 while (*fmt) {
204 char c = *(fmt++);
205 switch (c) {
206 case 'd': /* int */
207 in_objs[params.count].integer.value = va_arg(ap, int);
208 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
209 break;
210 /* add more types as needed */
211 default:
212 printk(IBM_ERR "acpi_evalf() called "
213 "with invalid format character '%c'\n", c);
214 return 0;
215 }
216 }
217 va_end(ap);
218
219 if (res_type != 'v') {
220 result.length = sizeof(out_obj);
221 result.pointer = &out_obj;
222 resultp = &result;
223 } else
224 resultp = NULL;
225
226 status = acpi_evaluate_object(handle, method, &params, resultp);
227
228 switch (res_type) {
229 case 'd': /* int */
230 if (res)
231 *(int *)res = out_obj.integer.value;
232 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
233 break;
234 case 'v': /* void */
235 success = status == AE_OK;
236 break;
237 /* add more types as needed */
238 default:
239 printk(IBM_ERR "acpi_evalf() called "
240 "with invalid format character '%c'\n", res_type);
241 return 0;
242 }
243
244 if (!success && !quiet)
245 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
246 method, fmt0, status);
247
248 return success;
249 }
250
251 static void __unused acpi_print_int(acpi_handle handle, char *method)
252 {
253 int i;
254
255 if (acpi_evalf(handle, &i, method, "d"))
256 printk(IBM_INFO "%s = 0x%x\n", method, i);
257 else
258 printk(IBM_ERR "error calling %s\n", method);
259 }
260
261 static int acpi_ec_read(int i, u8 * p)
262 {
263 int v;
264
265 if (ecrd_handle) {
266 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
267 return 0;
268 *p = v;
269 } else {
270 if (ec_read(i, p) < 0)
271 return 0;
272 }
273
274 return 1;
275 }
276
277 static int acpi_ec_write(int i, u8 v)
278 {
279 if (ecwr_handle) {
280 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
281 return 0;
282 } else {
283 if (ec_write(i, v) < 0)
284 return 0;
285 }
286
287 return 1;
288 }
289
290 static int _sta(acpi_handle handle)
291 {
292 int status;
293
294 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
295 status = 0;
296
297 return status;
298 }
299
300 static int issue_thinkpad_cmos_command(int cmos_cmd)
301 {
302 if (!cmos_handle)
303 return -ENXIO;
304
305 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
306 return -EIO;
307
308 return 0;
309 }
310
311 /*************************************************************************
312 * ACPI device model
313 */
314
315 static void drv_acpi_handle_init(char *name,
316 acpi_handle *handle, acpi_handle parent,
317 char **paths, int num_paths, char **path)
318 {
319 int i;
320 acpi_status status;
321
322 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
323 name);
324
325 for (i = 0; i < num_paths; i++) {
326 status = acpi_get_handle(parent, paths[i], handle);
327 if (ACPI_SUCCESS(status)) {
328 *path = paths[i];
329 dbg_printk(TPACPI_DBG_INIT,
330 "Found ACPI handle %s for %s\n",
331 *path, name);
332 return;
333 }
334 }
335
336 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
337 name);
338 *handle = NULL;
339 }
340
341 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
342 {
343 struct ibm_struct *ibm = data;
344
345 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
346 return;
347
348 ibm->acpi->notify(ibm, event);
349 }
350
351 static int __init setup_acpi_notify(struct ibm_struct *ibm)
352 {
353 acpi_status status;
354 int rc;
355
356 BUG_ON(!ibm->acpi);
357
358 if (!*ibm->acpi->handle)
359 return 0;
360
361 vdbg_printk(TPACPI_DBG_INIT,
362 "setting up ACPI notify for %s\n", ibm->name);
363
364 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
365 if (rc < 0) {
366 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
367 ibm->name, rc);
368 return -ENODEV;
369 }
370
371 acpi_driver_data(ibm->acpi->device) = ibm;
372 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
373 IBM_ACPI_EVENT_PREFIX,
374 ibm->name);
375
376 status = acpi_install_notify_handler(*ibm->acpi->handle,
377 ibm->acpi->type, dispatch_acpi_notify, ibm);
378 if (ACPI_FAILURE(status)) {
379 if (status == AE_ALREADY_EXISTS) {
380 printk(IBM_NOTICE "another device driver is already handling %s events\n",
381 ibm->name);
382 } else {
383 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
384 ibm->name, status);
385 }
386 return -ENODEV;
387 }
388 ibm->flags.acpi_notify_installed = 1;
389 return 0;
390 }
391
392 static int __init tpacpi_device_add(struct acpi_device *device)
393 {
394 return 0;
395 }
396
397 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
398 {
399 int rc;
400
401 dbg_printk(TPACPI_DBG_INIT,
402 "registering %s as an ACPI driver\n", ibm->name);
403
404 BUG_ON(!ibm->acpi);
405
406 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
407 if (!ibm->acpi->driver) {
408 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
409 return -ENOMEM;
410 }
411
412 sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
413 ibm->acpi->driver->ids = ibm->acpi->hid;
414 ibm->acpi->driver->ops.add = &tpacpi_device_add;
415
416 rc = acpi_bus_register_driver(ibm->acpi->driver);
417 if (rc < 0) {
418 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
419 ibm->acpi->hid, rc);
420 kfree(ibm->acpi->driver);
421 ibm->acpi->driver = NULL;
422 } else if (!rc)
423 ibm->flags.acpi_driver_registered = 1;
424
425 return rc;
426 }
427
428
429 /****************************************************************************
430 ****************************************************************************
431 *
432 * Procfs Helpers
433 *
434 ****************************************************************************
435 ****************************************************************************/
436
437 static int dispatch_procfs_read(char *page, char **start, off_t off,
438 int count, int *eof, void *data)
439 {
440 struct ibm_struct *ibm = data;
441 int len;
442
443 if (!ibm || !ibm->read)
444 return -EINVAL;
445
446 len = ibm->read(page);
447 if (len < 0)
448 return len;
449
450 if (len <= off + count)
451 *eof = 1;
452 *start = page + off;
453 len -= off;
454 if (len > count)
455 len = count;
456 if (len < 0)
457 len = 0;
458
459 return len;
460 }
461
462 static int dispatch_procfs_write(struct file *file,
463 const char __user * userbuf,
464 unsigned long count, void *data)
465 {
466 struct ibm_struct *ibm = data;
467 char *kernbuf;
468 int ret;
469
470 if (!ibm || !ibm->write)
471 return -EINVAL;
472
473 kernbuf = kmalloc(count + 2, GFP_KERNEL);
474 if (!kernbuf)
475 return -ENOMEM;
476
477 if (copy_from_user(kernbuf, userbuf, count)) {
478 kfree(kernbuf);
479 return -EFAULT;
480 }
481
482 kernbuf[count] = 0;
483 strcat(kernbuf, ",");
484 ret = ibm->write(kernbuf);
485 if (ret == 0)
486 ret = count;
487
488 kfree(kernbuf);
489
490 return ret;
491 }
492
493 static char *next_cmd(char **cmds)
494 {
495 char *start = *cmds;
496 char *end;
497
498 while ((end = strchr(start, ',')) && end == start)
499 start = end + 1;
500
501 if (!end)
502 return NULL;
503
504 *end = 0;
505 *cmds = end + 1;
506 return start;
507 }
508
509
510 /****************************************************************************
511 ****************************************************************************
512 *
513 * Device model: hwmon and platform
514 *
515 ****************************************************************************
516 ****************************************************************************/
517
518 static struct platform_device *tpacpi_pdev;
519 static struct class_device *tpacpi_hwmon;
520
521 static struct platform_driver tpacpi_pdriver = {
522 .driver = {
523 .name = IBM_DRVR_NAME,
524 .owner = THIS_MODULE,
525 },
526 };
527
528
529 /*************************************************************************
530 * thinkpad-acpi driver attributes
531 */
532
533 /* interface_version --------------------------------------------------- */
534 static ssize_t tpacpi_driver_interface_version_show(
535 struct device_driver *drv,
536 char *buf)
537 {
538 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
539 }
540
541 static DRIVER_ATTR(interface_version, S_IRUGO,
542 tpacpi_driver_interface_version_show, NULL);
543
544 /* debug_level --------------------------------------------------------- */
545 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
546 char *buf)
547 {
548 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
549 }
550
551 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
552 const char *buf, size_t count)
553 {
554 unsigned long t;
555
556 if (parse_strtoul(buf, 0xffff, &t))
557 return -EINVAL;
558
559 dbg_level = t;
560
561 return count;
562 }
563
564 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
565 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
566
567 /* version ------------------------------------------------------------- */
568 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
569 char *buf)
570 {
571 return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
572 }
573
574 static DRIVER_ATTR(version, S_IRUGO,
575 tpacpi_driver_version_show, NULL);
576
577 /* --------------------------------------------------------------------- */
578
579 static struct driver_attribute* tpacpi_driver_attributes[] = {
580 &driver_attr_debug_level, &driver_attr_version,
581 &driver_attr_interface_version,
582 };
583
584 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
585 {
586 int i, res;
587
588 i = 0;
589 res = 0;
590 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
591 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
592 i++;
593 }
594
595 return res;
596 }
597
598 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
599 {
600 int i;
601
602 for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
603 driver_remove_file(drv, tpacpi_driver_attributes[i]);
604 }
605
606 /*************************************************************************
607 * sysfs support helpers
608 */
609
610 struct attribute_set_obj {
611 struct attribute_set s;
612 struct attribute *a;
613 } __attribute__((packed));
614
615 static struct attribute_set *create_attr_set(unsigned int max_members,
616 const char* name)
617 {
618 struct attribute_set_obj *sobj;
619
620 if (max_members == 0)
621 return NULL;
622
623 /* Allocates space for implicit NULL at the end too */
624 sobj = kzalloc(sizeof(struct attribute_set_obj) +
625 max_members * sizeof(struct attribute *),
626 GFP_KERNEL);
627 if (!sobj)
628 return NULL;
629 sobj->s.max_members = max_members;
630 sobj->s.group.attrs = &sobj->a;
631 sobj->s.group.name = name;
632
633 return &sobj->s;
634 }
635
636 /* not multi-threaded safe, use it in a single thread per set */
637 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
638 {
639 if (!s || !attr)
640 return -EINVAL;
641
642 if (s->members >= s->max_members)
643 return -ENOMEM;
644
645 s->group.attrs[s->members] = attr;
646 s->members++;
647
648 return 0;
649 }
650
651 static int add_many_to_attr_set(struct attribute_set* s,
652 struct attribute **attr,
653 unsigned int count)
654 {
655 int i, res;
656
657 for (i = 0; i < count; i++) {
658 res = add_to_attr_set(s, attr[i]);
659 if (res)
660 return res;
661 }
662
663 return 0;
664 }
665
666 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
667 {
668 sysfs_remove_group(kobj, &s->group);
669 destroy_attr_set(s);
670 }
671
672 static int parse_strtoul(const char *buf,
673 unsigned long max, unsigned long *value)
674 {
675 char *endp;
676
677 *value = simple_strtoul(buf, &endp, 0);
678 while (*endp && isspace(*endp))
679 endp++;
680 if (*endp || *value > max)
681 return -EINVAL;
682
683 return 0;
684 }
685
686 /****************************************************************************
687 ****************************************************************************
688 *
689 * Subdrivers
690 *
691 ****************************************************************************
692 ****************************************************************************/
693
694 /*************************************************************************
695 * thinkpad-acpi init subdriver
696 */
697
698 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
699 {
700 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
701 printk(IBM_INFO "%s\n", IBM_URL);
702
703 if (ibm_thinkpad_ec_found)
704 printk(IBM_INFO "ThinkPad EC firmware %s\n",
705 ibm_thinkpad_ec_found);
706
707 return 0;
708 }
709
710 static int thinkpad_acpi_driver_read(char *p)
711 {
712 int len = 0;
713
714 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
715 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
716
717 return len;
718 }
719
720 static struct ibm_struct thinkpad_acpi_driver_data = {
721 .name = "driver",
722 .read = thinkpad_acpi_driver_read,
723 };
724
725 /*************************************************************************
726 * Hotkey subdriver
727 */
728
729 static int hotkey_orig_status;
730 static u32 hotkey_orig_mask;
731 static u32 hotkey_all_mask;
732 static u32 hotkey_reserved_mask = 0x00778000;
733
734 static struct attribute_set *hotkey_dev_attributes;
735
736 static int hotkey_get_wlsw(int *status)
737 {
738 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
739 return -EIO;
740 return 0;
741 }
742
743 /* sysfs hotkey enable ------------------------------------------------- */
744 static ssize_t hotkey_enable_show(struct device *dev,
745 struct device_attribute *attr,
746 char *buf)
747 {
748 int res, status;
749 u32 mask;
750
751 res = hotkey_get(&status, &mask);
752 if (res)
753 return res;
754
755 return snprintf(buf, PAGE_SIZE, "%d\n", status);
756 }
757
758 static ssize_t hotkey_enable_store(struct device *dev,
759 struct device_attribute *attr,
760 const char *buf, size_t count)
761 {
762 unsigned long t;
763 int res, status;
764 u32 mask;
765
766 if (parse_strtoul(buf, 1, &t))
767 return -EINVAL;
768
769 res = hotkey_get(&status, &mask);
770 if (!res)
771 res = hotkey_set(t, mask);
772
773 return (res) ? res : count;
774 }
775
776 static struct device_attribute dev_attr_hotkey_enable =
777 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
778 hotkey_enable_show, hotkey_enable_store);
779
780 /* sysfs hotkey mask --------------------------------------------------- */
781 static ssize_t hotkey_mask_show(struct device *dev,
782 struct device_attribute *attr,
783 char *buf)
784 {
785 int res, status;
786 u32 mask;
787
788 res = hotkey_get(&status, &mask);
789 if (res)
790 return res;
791
792 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
793 }
794
795 static ssize_t hotkey_mask_store(struct device *dev,
796 struct device_attribute *attr,
797 const char *buf, size_t count)
798 {
799 unsigned long t;
800 int res, status;
801 u32 mask;
802
803 if (parse_strtoul(buf, 0xffffffffUL, &t))
804 return -EINVAL;
805
806 res = hotkey_get(&status, &mask);
807 if (!res)
808 hotkey_set(status, t);
809
810 return (res) ? res : count;
811 }
812
813 static struct device_attribute dev_attr_hotkey_mask =
814 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
815 hotkey_mask_show, hotkey_mask_store);
816
817 /* sysfs hotkey bios_enabled ------------------------------------------- */
818 static ssize_t hotkey_bios_enabled_show(struct device *dev,
819 struct device_attribute *attr,
820 char *buf)
821 {
822 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
823 }
824
825 static struct device_attribute dev_attr_hotkey_bios_enabled =
826 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
827
828 /* sysfs hotkey bios_mask ---------------------------------------------- */
829 static ssize_t hotkey_bios_mask_show(struct device *dev,
830 struct device_attribute *attr,
831 char *buf)
832 {
833 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
834 }
835
836 static struct device_attribute dev_attr_hotkey_bios_mask =
837 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
838
839 /* sysfs hotkey all_mask ----------------------------------------------- */
840 static ssize_t hotkey_all_mask_show(struct device *dev,
841 struct device_attribute *attr,
842 char *buf)
843 {
844 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
845 }
846
847 static struct device_attribute dev_attr_hotkey_all_mask =
848 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
849
850 /* sysfs hotkey recommended_mask --------------------------------------- */
851 static ssize_t hotkey_recommended_mask_show(struct device *dev,
852 struct device_attribute *attr,
853 char *buf)
854 {
855 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
856 hotkey_all_mask & ~hotkey_reserved_mask);
857 }
858
859 static struct device_attribute dev_attr_hotkey_recommended_mask =
860 __ATTR(hotkey_recommended_mask, S_IRUGO,
861 hotkey_recommended_mask_show, NULL);
862
863 /* sysfs hotkey radio_sw ----------------------------------------------- */
864 static ssize_t hotkey_radio_sw_show(struct device *dev,
865 struct device_attribute *attr,
866 char *buf)
867 {
868 int res, s;
869 res = hotkey_get_wlsw(&s);
870 if (res < 0)
871 return res;
872
873 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
874 }
875
876 static struct device_attribute dev_attr_hotkey_radio_sw =
877 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
878
879 /* --------------------------------------------------------------------- */
880
881 static struct attribute *hotkey_mask_attributes[] = {
882 &dev_attr_hotkey_mask.attr,
883 &dev_attr_hotkey_bios_enabled.attr,
884 &dev_attr_hotkey_bios_mask.attr,
885 &dev_attr_hotkey_all_mask.attr,
886 &dev_attr_hotkey_recommended_mask.attr,
887 };
888
889 static int __init hotkey_init(struct ibm_init_struct *iibm)
890 {
891 int res;
892 int status;
893
894 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
895
896 IBM_ACPIHANDLE_INIT(hkey);
897 mutex_init(&hotkey_mutex);
898
899 /* hotkey not supported on 570 */
900 tp_features.hotkey = hkey_handle != NULL;
901
902 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
903 str_supported(tp_features.hotkey));
904
905 if (tp_features.hotkey) {
906 hotkey_dev_attributes = create_attr_set(7, NULL);
907 if (!hotkey_dev_attributes)
908 return -ENOMEM;
909 res = add_to_attr_set(hotkey_dev_attributes,
910 &dev_attr_hotkey_enable.attr);
911 if (res)
912 return res;
913
914 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
915 A30, R30, R31, T20-22, X20-21, X22-24 */
916 tp_features.hotkey_mask =
917 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
918
919 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
920 str_supported(tp_features.hotkey_mask));
921
922 if (tp_features.hotkey_mask) {
923 /* MHKA available in A31, R40, R40e, T4x, X31, and later */
924 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
925 "MHKA", "qd"))
926 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
927 }
928
929 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
930 if (!res && tp_features.hotkey_mask) {
931 res = add_many_to_attr_set(hotkey_dev_attributes,
932 hotkey_mask_attributes,
933 ARRAY_SIZE(hotkey_mask_attributes));
934 }
935
936 /* Not all thinkpads have a hardware radio switch */
937 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
938 tp_features.hotkey_wlsw = 1;
939 printk(IBM_INFO
940 "radio switch found; radios are %s\n",
941 enabled(status, 0));
942 res = add_to_attr_set(hotkey_dev_attributes,
943 &dev_attr_hotkey_radio_sw.attr);
944 }
945
946 if (!res)
947 res = register_attr_set_with_sysfs(
948 hotkey_dev_attributes,
949 &tpacpi_pdev->dev.kobj);
950 if (res)
951 return res;
952 }
953
954 return (tp_features.hotkey)? 0 : 1;
955 }
956
957 static void hotkey_exit(void)
958 {
959 int res;
960
961 if (tp_features.hotkey) {
962 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
963 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
964 if (res)
965 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
966 }
967
968 if (hotkey_dev_attributes) {
969 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
970 hotkey_dev_attributes = NULL;
971 }
972 }
973
974 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
975 {
976 int hkey;
977
978 if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
979 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
980 } else {
981 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
982 acpi_bus_generate_event(ibm->acpi->device, event, 0);
983 }
984 }
985
986 /*
987 * Call with hotkey_mutex held
988 */
989 static int hotkey_get(int *status, u32 *mask)
990 {
991 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
992 return -EIO;
993
994 if (tp_features.hotkey_mask)
995 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
996 return -EIO;
997
998 return 0;
999 }
1000
1001 /*
1002 * Call with hotkey_mutex held
1003 */
1004 static int hotkey_set(int status, u32 mask)
1005 {
1006 int i;
1007
1008 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1009 return -EIO;
1010
1011 if (tp_features.hotkey_mask)
1012 for (i = 0; i < 32; i++) {
1013 int bit = ((1 << i) & mask) != 0;
1014 if (!acpi_evalf(hkey_handle,
1015 NULL, "MHKM", "vdd", i + 1, bit))
1016 return -EIO;
1017 }
1018
1019 return 0;
1020 }
1021
1022 /* procfs -------------------------------------------------------------- */
1023 static int hotkey_read(char *p)
1024 {
1025 int res, status;
1026 u32 mask;
1027 int len = 0;
1028
1029 if (!tp_features.hotkey) {
1030 len += sprintf(p + len, "status:\t\tnot supported\n");
1031 return len;
1032 }
1033
1034 res = mutex_lock_interruptible(&hotkey_mutex);
1035 if (res < 0)
1036 return res;
1037 res = hotkey_get(&status, &mask);
1038 mutex_unlock(&hotkey_mutex);
1039 if (res)
1040 return res;
1041
1042 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1043 if (tp_features.hotkey_mask) {
1044 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1045 len += sprintf(p + len,
1046 "commands:\tenable, disable, reset, <mask>\n");
1047 } else {
1048 len += sprintf(p + len, "mask:\t\tnot supported\n");
1049 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1050 }
1051
1052 return len;
1053 }
1054
1055 static int hotkey_write(char *buf)
1056 {
1057 int res, status;
1058 u32 mask;
1059 char *cmd;
1060 int do_cmd = 0;
1061
1062 if (!tp_features.hotkey)
1063 return -ENODEV;
1064
1065 res = mutex_lock_interruptible(&hotkey_mutex);
1066 if (res < 0)
1067 return res;
1068
1069 res = hotkey_get(&status, &mask);
1070 if (res)
1071 goto errexit;
1072
1073 res = 0;
1074 while ((cmd = next_cmd(&buf))) {
1075 if (strlencmp(cmd, "enable") == 0) {
1076 status = 1;
1077 } else if (strlencmp(cmd, "disable") == 0) {
1078 status = 0;
1079 } else if (strlencmp(cmd, "reset") == 0) {
1080 status = hotkey_orig_status;
1081 mask = hotkey_orig_mask;
1082 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1083 /* mask set */
1084 } else if (sscanf(cmd, "%x", &mask) == 1) {
1085 /* mask set */
1086 } else {
1087 res = -EINVAL;
1088 goto errexit;
1089 }
1090 do_cmd = 1;
1091 }
1092
1093 if (do_cmd)
1094 res = hotkey_set(status, mask);
1095
1096 errexit:
1097 mutex_unlock(&hotkey_mutex);
1098 return res;
1099 }
1100
1101 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1102 .hid = IBM_HKEY_HID,
1103 .notify = hotkey_notify,
1104 .handle = &hkey_handle,
1105 .type = ACPI_DEVICE_NOTIFY,
1106 };
1107
1108 static struct ibm_struct hotkey_driver_data = {
1109 .name = "hotkey",
1110 .read = hotkey_read,
1111 .write = hotkey_write,
1112 .exit = hotkey_exit,
1113 .acpi = &ibm_hotkey_acpidriver,
1114 };
1115
1116 /*************************************************************************
1117 * Bluetooth subdriver
1118 */
1119
1120 /* sysfs bluetooth enable ---------------------------------------------- */
1121 static ssize_t bluetooth_enable_show(struct device *dev,
1122 struct device_attribute *attr,
1123 char *buf)
1124 {
1125 int status;
1126
1127 status = bluetooth_get_radiosw();
1128 if (status < 0)
1129 return status;
1130
1131 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1132 }
1133
1134 static ssize_t bluetooth_enable_store(struct device *dev,
1135 struct device_attribute *attr,
1136 const char *buf, size_t count)
1137 {
1138 unsigned long t;
1139 int res;
1140
1141 if (parse_strtoul(buf, 1, &t))
1142 return -EINVAL;
1143
1144 res = bluetooth_set_radiosw(t);
1145
1146 return (res) ? res : count;
1147 }
1148
1149 static struct device_attribute dev_attr_bluetooth_enable =
1150 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1151 bluetooth_enable_show, bluetooth_enable_store);
1152
1153 /* --------------------------------------------------------------------- */
1154
1155 static struct attribute *bluetooth_attributes[] = {
1156 &dev_attr_bluetooth_enable.attr,
1157 NULL
1158 };
1159
1160 static const struct attribute_group bluetooth_attr_group = {
1161 .attrs = bluetooth_attributes,
1162 };
1163
1164 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1165 {
1166 int res;
1167 int status = 0;
1168
1169 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1170
1171 IBM_ACPIHANDLE_INIT(hkey);
1172
1173 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1174 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1175 tp_features.bluetooth = hkey_handle &&
1176 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1177
1178 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1179 str_supported(tp_features.bluetooth),
1180 status);
1181
1182 if (tp_features.bluetooth) {
1183 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1184 /* no bluetooth hardware present in system */
1185 tp_features.bluetooth = 0;
1186 dbg_printk(TPACPI_DBG_INIT,
1187 "bluetooth hardware not installed\n");
1188 } else {
1189 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1190 &bluetooth_attr_group);
1191 if (res)
1192 return res;
1193 }
1194 }
1195
1196 return (tp_features.bluetooth)? 0 : 1;
1197 }
1198
1199 static void bluetooth_exit(void)
1200 {
1201 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1202 &bluetooth_attr_group);
1203 }
1204
1205 static int bluetooth_get_radiosw(void)
1206 {
1207 int status;
1208
1209 if (!tp_features.bluetooth)
1210 return -ENODEV;
1211
1212 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1213 return -EIO;
1214
1215 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1216 }
1217
1218 static int bluetooth_set_radiosw(int radio_on)
1219 {
1220 int status;
1221
1222 if (!tp_features.bluetooth)
1223 return -ENODEV;
1224
1225 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1226 return -EIO;
1227 if (radio_on)
1228 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1229 else
1230 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1231 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1232 return -EIO;
1233
1234 return 0;
1235 }
1236
1237 /* procfs -------------------------------------------------------------- */
1238 static int bluetooth_read(char *p)
1239 {
1240 int len = 0;
1241 int status = bluetooth_get_radiosw();
1242
1243 if (!tp_features.bluetooth)
1244 len += sprintf(p + len, "status:\t\tnot supported\n");
1245 else {
1246 len += sprintf(p + len, "status:\t\t%s\n",
1247 (status)? "enabled" : "disabled");
1248 len += sprintf(p + len, "commands:\tenable, disable\n");
1249 }
1250
1251 return len;
1252 }
1253
1254 static int bluetooth_write(char *buf)
1255 {
1256 char *cmd;
1257
1258 if (!tp_features.bluetooth)
1259 return -ENODEV;
1260
1261 while ((cmd = next_cmd(&buf))) {
1262 if (strlencmp(cmd, "enable") == 0) {
1263 bluetooth_set_radiosw(1);
1264 } else if (strlencmp(cmd, "disable") == 0) {
1265 bluetooth_set_radiosw(0);
1266 } else
1267 return -EINVAL;
1268 }
1269
1270 return 0;
1271 }
1272
1273 static struct ibm_struct bluetooth_driver_data = {
1274 .name = "bluetooth",
1275 .read = bluetooth_read,
1276 .write = bluetooth_write,
1277 .exit = bluetooth_exit,
1278 };
1279
1280 /*************************************************************************
1281 * Wan subdriver
1282 */
1283
1284 /* sysfs wan enable ---------------------------------------------------- */
1285 static ssize_t wan_enable_show(struct device *dev,
1286 struct device_attribute *attr,
1287 char *buf)
1288 {
1289 int status;
1290
1291 status = wan_get_radiosw();
1292 if (status < 0)
1293 return status;
1294
1295 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1296 }
1297
1298 static ssize_t wan_enable_store(struct device *dev,
1299 struct device_attribute *attr,
1300 const char *buf, size_t count)
1301 {
1302 unsigned long t;
1303 int res;
1304
1305 if (parse_strtoul(buf, 1, &t))
1306 return -EINVAL;
1307
1308 res = wan_set_radiosw(t);
1309
1310 return (res) ? res : count;
1311 }
1312
1313 static struct device_attribute dev_attr_wan_enable =
1314 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1315 wan_enable_show, wan_enable_store);
1316
1317 /* --------------------------------------------------------------------- */
1318
1319 static struct attribute *wan_attributes[] = {
1320 &dev_attr_wan_enable.attr,
1321 NULL
1322 };
1323
1324 static const struct attribute_group wan_attr_group = {
1325 .attrs = wan_attributes,
1326 };
1327
1328 static int __init wan_init(struct ibm_init_struct *iibm)
1329 {
1330 int res;
1331 int status = 0;
1332
1333 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1334
1335 IBM_ACPIHANDLE_INIT(hkey);
1336
1337 tp_features.wan = hkey_handle &&
1338 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1339
1340 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1341 str_supported(tp_features.wan),
1342 status);
1343
1344 if (tp_features.wan) {
1345 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1346 /* no wan hardware present in system */
1347 tp_features.wan = 0;
1348 dbg_printk(TPACPI_DBG_INIT,
1349 "wan hardware not installed\n");
1350 } else {
1351 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1352 &wan_attr_group);
1353 if (res)
1354 return res;
1355 }
1356 }
1357
1358 return (tp_features.wan)? 0 : 1;
1359 }
1360
1361 static void wan_exit(void)
1362 {
1363 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1364 &wan_attr_group);
1365 }
1366
1367 static int wan_get_radiosw(void)
1368 {
1369 int status;
1370
1371 if (!tp_features.wan)
1372 return -ENODEV;
1373
1374 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1375 return -EIO;
1376
1377 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1378 }
1379
1380 static int wan_set_radiosw(int radio_on)
1381 {
1382 int status;
1383
1384 if (!tp_features.wan)
1385 return -ENODEV;
1386
1387 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1388 return -EIO;
1389 if (radio_on)
1390 status |= TP_ACPI_WANCARD_RADIOSSW;
1391 else
1392 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1393 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1394 return -EIO;
1395
1396 return 0;
1397 }
1398
1399 /* procfs -------------------------------------------------------------- */
1400 static int wan_read(char *p)
1401 {
1402 int len = 0;
1403 int status = wan_get_radiosw();
1404
1405 if (!tp_features.wan)
1406 len += sprintf(p + len, "status:\t\tnot supported\n");
1407 else {
1408 len += sprintf(p + len, "status:\t\t%s\n",
1409 (status)? "enabled" : "disabled");
1410 len += sprintf(p + len, "commands:\tenable, disable\n");
1411 }
1412
1413 return len;
1414 }
1415
1416 static int wan_write(char *buf)
1417 {
1418 char *cmd;
1419
1420 if (!tp_features.wan)
1421 return -ENODEV;
1422
1423 while ((cmd = next_cmd(&buf))) {
1424 if (strlencmp(cmd, "enable") == 0) {
1425 wan_set_radiosw(1);
1426 } else if (strlencmp(cmd, "disable") == 0) {
1427 wan_set_radiosw(0);
1428 } else
1429 return -EINVAL;
1430 }
1431
1432 return 0;
1433 }
1434
1435 static struct ibm_struct wan_driver_data = {
1436 .name = "wan",
1437 .read = wan_read,
1438 .write = wan_write,
1439 .exit = wan_exit,
1440 .flags.experimental = 1,
1441 };
1442
1443 /*************************************************************************
1444 * Video subdriver
1445 */
1446
1447 static enum video_access_mode video_supported;
1448 static int video_orig_autosw;
1449
1450 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1451 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1452 "\\_SB.PCI0.VID0", /* 770e */
1453 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1454 "\\_SB.PCI0.AGP.VID", /* all others */
1455 ); /* R30, R31 */
1456
1457 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1458
1459 static int __init video_init(struct ibm_init_struct *iibm)
1460 {
1461 int ivga;
1462
1463 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1464
1465 IBM_ACPIHANDLE_INIT(vid);
1466 IBM_ACPIHANDLE_INIT(vid2);
1467
1468 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1469 /* G41, assume IVGA doesn't change */
1470 vid_handle = vid2_handle;
1471
1472 if (!vid_handle)
1473 /* video switching not supported on R30, R31 */
1474 video_supported = TPACPI_VIDEO_NONE;
1475 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1476 /* 570 */
1477 video_supported = TPACPI_VIDEO_570;
1478 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1479 /* 600e/x, 770e, 770x */
1480 video_supported = TPACPI_VIDEO_770;
1481 else
1482 /* all others */
1483 video_supported = TPACPI_VIDEO_NEW;
1484
1485 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1486 str_supported(video_supported != TPACPI_VIDEO_NONE),
1487 video_supported);
1488
1489 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1490 }
1491
1492 static void video_exit(void)
1493 {
1494 dbg_printk(TPACPI_DBG_EXIT,
1495 "restoring original video autoswitch mode\n");
1496 if (video_autosw_set(video_orig_autosw))
1497 printk(IBM_ERR "error while trying to restore original "
1498 "video autoswitch mode\n");
1499 }
1500
1501 static int video_outputsw_get(void)
1502 {
1503 int status = 0;
1504 int i;
1505
1506 switch (video_supported) {
1507 case TPACPI_VIDEO_570:
1508 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1509 TP_ACPI_VIDEO_570_PHSCMD))
1510 return -EIO;
1511 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1512 break;
1513 case TPACPI_VIDEO_770:
1514 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1515 return -EIO;
1516 if (i)
1517 status |= TP_ACPI_VIDEO_S_LCD;
1518 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1519 return -EIO;
1520 if (i)
1521 status |= TP_ACPI_VIDEO_S_CRT;
1522 break;
1523 case TPACPI_VIDEO_NEW:
1524 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1525 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1526 return -EIO;
1527 if (i)
1528 status |= TP_ACPI_VIDEO_S_CRT;
1529
1530 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1531 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1532 return -EIO;
1533 if (i)
1534 status |= TP_ACPI_VIDEO_S_LCD;
1535 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1536 return -EIO;
1537 if (i)
1538 status |= TP_ACPI_VIDEO_S_DVI;
1539 break;
1540 default:
1541 return -ENOSYS;
1542 }
1543
1544 return status;
1545 }
1546
1547 static int video_outputsw_set(int status)
1548 {
1549 int autosw;
1550 int res = 0;
1551
1552 switch (video_supported) {
1553 case TPACPI_VIDEO_570:
1554 res = acpi_evalf(NULL, NULL,
1555 "\\_SB.PHS2", "vdd",
1556 TP_ACPI_VIDEO_570_PHS2CMD,
1557 status | TP_ACPI_VIDEO_570_PHS2SET);
1558 break;
1559 case TPACPI_VIDEO_770:
1560 autosw = video_autosw_get();
1561 if (autosw < 0)
1562 return autosw;
1563
1564 res = video_autosw_set(1);
1565 if (res)
1566 return res;
1567 res = acpi_evalf(vid_handle, NULL,
1568 "ASWT", "vdd", status * 0x100, 0);
1569 if (!autosw && video_autosw_set(autosw)) {
1570 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1571 return -EIO;
1572 }
1573 break;
1574 case TPACPI_VIDEO_NEW:
1575 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1576 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1577 break;
1578 default:
1579 return -ENOSYS;
1580 }
1581
1582 return (res)? 0 : -EIO;
1583 }
1584
1585 static int video_autosw_get(void)
1586 {
1587 int autosw = 0;
1588
1589 switch (video_supported) {
1590 case TPACPI_VIDEO_570:
1591 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1592 return -EIO;
1593 break;
1594 case TPACPI_VIDEO_770:
1595 case TPACPI_VIDEO_NEW:
1596 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1597 return -EIO;
1598 break;
1599 default:
1600 return -ENOSYS;
1601 }
1602
1603 return autosw & 1;
1604 }
1605
1606 static int video_autosw_set(int enable)
1607 {
1608 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1609 return -EIO;
1610 return 0;
1611 }
1612
1613 static int video_outputsw_cycle(void)
1614 {
1615 int autosw = video_autosw_get();
1616 int res;
1617
1618 if (autosw < 0)
1619 return autosw;
1620
1621 switch (video_supported) {
1622 case TPACPI_VIDEO_570:
1623 res = video_autosw_set(1);
1624 if (res)
1625 return res;
1626 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1627 break;
1628 case TPACPI_VIDEO_770:
1629 case TPACPI_VIDEO_NEW:
1630 res = video_autosw_set(1);
1631 if (res)
1632 return res;
1633 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1634 break;
1635 default:
1636 return -ENOSYS;
1637 }
1638 if (!autosw && video_autosw_set(autosw)) {
1639 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1640 return -EIO;
1641 }
1642
1643 return (res)? 0 : -EIO;
1644 }
1645
1646 static int video_expand_toggle(void)
1647 {
1648 switch (video_supported) {
1649 case TPACPI_VIDEO_570:
1650 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1651 0 : -EIO;
1652 case TPACPI_VIDEO_770:
1653 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1654 0 : -EIO;
1655 case TPACPI_VIDEO_NEW:
1656 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1657 0 : -EIO;
1658 default:
1659 return -ENOSYS;
1660 }
1661 /* not reached */
1662 }
1663
1664 static int video_read(char *p)
1665 {
1666 int status, autosw;
1667 int len = 0;
1668
1669 if (video_supported == TPACPI_VIDEO_NONE) {
1670 len += sprintf(p + len, "status:\t\tnot supported\n");
1671 return len;
1672 }
1673
1674 status = video_outputsw_get();
1675 if (status < 0)
1676 return status;
1677
1678 autosw = video_autosw_get();
1679 if (autosw < 0)
1680 return autosw;
1681
1682 len += sprintf(p + len, "status:\t\tsupported\n");
1683 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1684 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1685 if (video_supported == TPACPI_VIDEO_NEW)
1686 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1687 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1688 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1689 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1690 if (video_supported == TPACPI_VIDEO_NEW)
1691 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1692 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1693 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1694
1695 return len;
1696 }
1697
1698 static int video_write(char *buf)
1699 {
1700 char *cmd;
1701 int enable, disable, status;
1702 int res;
1703
1704 if (video_supported == TPACPI_VIDEO_NONE)
1705 return -ENODEV;
1706
1707 enable = 0;
1708 disable = 0;
1709
1710 while ((cmd = next_cmd(&buf))) {
1711 if (strlencmp(cmd, "lcd_enable") == 0) {
1712 enable |= TP_ACPI_VIDEO_S_LCD;
1713 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1714 disable |= TP_ACPI_VIDEO_S_LCD;
1715 } else if (strlencmp(cmd, "crt_enable") == 0) {
1716 enable |= TP_ACPI_VIDEO_S_CRT;
1717 } else if (strlencmp(cmd, "crt_disable") == 0) {
1718 disable |= TP_ACPI_VIDEO_S_CRT;
1719 } else if (video_supported == TPACPI_VIDEO_NEW &&
1720 strlencmp(cmd, "dvi_enable") == 0) {
1721 enable |= TP_ACPI_VIDEO_S_DVI;
1722 } else if (video_supported == TPACPI_VIDEO_NEW &&
1723 strlencmp(cmd, "dvi_disable") == 0) {
1724 disable |= TP_ACPI_VIDEO_S_DVI;
1725 } else if (strlencmp(cmd, "auto_enable") == 0) {
1726 res = video_autosw_set(1);
1727 if (res)
1728 return res;
1729 } else if (strlencmp(cmd, "auto_disable") == 0) {
1730 res = video_autosw_set(0);
1731 if (res)
1732 return res;
1733 } else if (strlencmp(cmd, "video_switch") == 0) {
1734 res = video_outputsw_cycle();
1735 if (res)
1736 return res;
1737 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1738 res = video_expand_toggle();
1739 if (res)
1740 return res;
1741 } else
1742 return -EINVAL;
1743 }
1744
1745 if (enable || disable) {
1746 status = video_outputsw_get();
1747 if (status < 0)
1748 return status;
1749 res = video_outputsw_set((status & ~disable) | enable);
1750 if (res)
1751 return res;
1752 }
1753
1754 return 0;
1755 }
1756
1757 static struct ibm_struct video_driver_data = {
1758 .name = "video",
1759 .read = video_read,
1760 .write = video_write,
1761 .exit = video_exit,
1762 };
1763
1764 /*************************************************************************
1765 * Light (thinklight) subdriver
1766 */
1767
1768 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1769 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1770
1771 static int __init light_init(struct ibm_init_struct *iibm)
1772 {
1773 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1774
1775 IBM_ACPIHANDLE_INIT(ledb);
1776 IBM_ACPIHANDLE_INIT(lght);
1777 IBM_ACPIHANDLE_INIT(cmos);
1778
1779 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1780 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1781
1782 if (tp_features.light)
1783 /* light status not supported on
1784 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1785 tp_features.light_status =
1786 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1787
1788 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1789 str_supported(tp_features.light));
1790
1791 return (tp_features.light)? 0 : 1;
1792 }
1793
1794 static int light_read(char *p)
1795 {
1796 int len = 0;
1797 int status = 0;
1798
1799 if (!tp_features.light) {
1800 len += sprintf(p + len, "status:\t\tnot supported\n");
1801 } else if (!tp_features.light_status) {
1802 len += sprintf(p + len, "status:\t\tunknown\n");
1803 len += sprintf(p + len, "commands:\ton, off\n");
1804 } else {
1805 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1806 return -EIO;
1807 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1808 len += sprintf(p + len, "commands:\ton, off\n");
1809 }
1810
1811 return len;
1812 }
1813
1814 static int light_write(char *buf)
1815 {
1816 int cmos_cmd, lght_cmd;
1817 char *cmd;
1818 int success;
1819
1820 if (!tp_features.light)
1821 return -ENODEV;
1822
1823 while ((cmd = next_cmd(&buf))) {
1824 if (strlencmp(cmd, "on") == 0) {
1825 cmos_cmd = 0x0c;
1826 lght_cmd = 1;
1827 } else if (strlencmp(cmd, "off") == 0) {
1828 cmos_cmd = 0x0d;
1829 lght_cmd = 0;
1830 } else
1831 return -EINVAL;
1832
1833 success = cmos_handle ?
1834 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1835 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1836 if (!success)
1837 return -EIO;
1838 }
1839
1840 return 0;
1841 }
1842
1843 static struct ibm_struct light_driver_data = {
1844 .name = "light",
1845 .read = light_read,
1846 .write = light_write,
1847 };
1848
1849 /*************************************************************************
1850 * Dock subdriver
1851 */
1852
1853 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1854
1855 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1856 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1857 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1858 "\\_SB.PCI.ISA.SLCE", /* 570 */
1859 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1860
1861 /* don't list other alternatives as we install a notify handler on the 570 */
1862 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1863
1864 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1865 {
1866 .notify = dock_notify,
1867 .handle = &dock_handle,
1868 .type = ACPI_SYSTEM_NOTIFY,
1869 },
1870 {
1871 .hid = IBM_PCI_HID,
1872 .notify = dock_notify,
1873 .handle = &pci_handle,
1874 .type = ACPI_SYSTEM_NOTIFY,
1875 },
1876 };
1877
1878 static struct ibm_struct dock_driver_data[2] = {
1879 {
1880 .name = "dock",
1881 .read = dock_read,
1882 .write = dock_write,
1883 .acpi = &ibm_dock_acpidriver[0],
1884 },
1885 {
1886 .name = "dock",
1887 .acpi = &ibm_dock_acpidriver[1],
1888 },
1889 };
1890
1891 #define dock_docked() (_sta(dock_handle) & 1)
1892
1893 static int __init dock_init(struct ibm_init_struct *iibm)
1894 {
1895 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1896
1897 IBM_ACPIHANDLE_INIT(dock);
1898
1899 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1900 str_supported(dock_handle != NULL));
1901
1902 return (dock_handle)? 0 : 1;
1903 }
1904
1905 static int __init dock_init2(struct ibm_init_struct *iibm)
1906 {
1907 int dock2_needed;
1908
1909 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
1910
1911 if (dock_driver_data[0].flags.acpi_driver_registered &&
1912 dock_driver_data[0].flags.acpi_notify_installed) {
1913 IBM_ACPIHANDLE_INIT(pci);
1914 dock2_needed = (pci_handle != NULL);
1915 vdbg_printk(TPACPI_DBG_INIT,
1916 "dock PCI handler for the TP 570 is %s\n",
1917 str_supported(dock2_needed));
1918 } else {
1919 vdbg_printk(TPACPI_DBG_INIT,
1920 "dock subdriver part 2 not required\n");
1921 dock2_needed = 0;
1922 }
1923
1924 return (dock2_needed)? 0 : 1;
1925 }
1926
1927 static void dock_notify(struct ibm_struct *ibm, u32 event)
1928 {
1929 int docked = dock_docked();
1930 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1931
1932 if (event == 1 && !pci) /* 570 */
1933 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1934 else if (event == 1 && pci) /* 570 */
1935 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1936 else if (event == 3 && docked)
1937 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1938 else if (event == 3 && !docked)
1939 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
1940 else if (event == 0 && docked)
1941 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1942 else {
1943 printk(IBM_ERR "unknown dock event %d, status %d\n",
1944 event, _sta(dock_handle));
1945 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
1946 }
1947 }
1948
1949 static int dock_read(char *p)
1950 {
1951 int len = 0;
1952 int docked = dock_docked();
1953
1954 if (!dock_handle)
1955 len += sprintf(p + len, "status:\t\tnot supported\n");
1956 else if (!docked)
1957 len += sprintf(p + len, "status:\t\tundocked\n");
1958 else {
1959 len += sprintf(p + len, "status:\t\tdocked\n");
1960 len += sprintf(p + len, "commands:\tdock, undock\n");
1961 }
1962
1963 return len;
1964 }
1965
1966 static int dock_write(char *buf)
1967 {
1968 char *cmd;
1969
1970 if (!dock_docked())
1971 return -ENODEV;
1972
1973 while ((cmd = next_cmd(&buf))) {
1974 if (strlencmp(cmd, "undock") == 0) {
1975 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1976 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1977 return -EIO;
1978 } else if (strlencmp(cmd, "dock") == 0) {
1979 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1980 return -EIO;
1981 } else
1982 return -EINVAL;
1983 }
1984
1985 return 0;
1986 }
1987
1988 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1989
1990 /*************************************************************************
1991 * Bay subdriver
1992 */
1993
1994 #ifdef CONFIG_THINKPAD_ACPI_BAY
1995 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1996 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1997 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1998 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1999 ); /* A21e, R30, R31 */
2000 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2001 "_EJ0", /* all others */
2002 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2003 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
2004 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2005 ); /* all others */
2006 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
2007 "_EJ0", /* 770x */
2008 ); /* all others */
2009
2010 static int __init bay_init(struct ibm_init_struct *iibm)
2011 {
2012 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2013
2014 IBM_ACPIHANDLE_INIT(bay);
2015 if (bay_handle)
2016 IBM_ACPIHANDLE_INIT(bay_ej);
2017 IBM_ACPIHANDLE_INIT(bay2);
2018 if (bay2_handle)
2019 IBM_ACPIHANDLE_INIT(bay2_ej);
2020
2021 tp_features.bay_status = bay_handle &&
2022 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2023 tp_features.bay_status2 = bay2_handle &&
2024 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2025
2026 tp_features.bay_eject = bay_handle && bay_ej_handle &&
2027 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2028 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2029 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2030
2031 vdbg_printk(TPACPI_DBG_INIT,
2032 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2033 str_supported(tp_features.bay_status),
2034 str_supported(tp_features.bay_eject),
2035 str_supported(tp_features.bay_status2),
2036 str_supported(tp_features.bay_eject2));
2037
2038 return (tp_features.bay_status || tp_features.bay_eject ||
2039 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2040 }
2041
2042 static void bay_notify(struct ibm_struct *ibm, u32 event)
2043 {
2044 acpi_bus_generate_event(ibm->acpi->device, event, 0);
2045 }
2046
2047 #define bay_occupied(b) (_sta(b##_handle) & 1)
2048
2049 static int bay_read(char *p)
2050 {
2051 int len = 0;
2052 int occupied = bay_occupied(bay);
2053 int occupied2 = bay_occupied(bay2);
2054 int eject, eject2;
2055
2056 len += sprintf(p + len, "status:\t\t%s\n",
2057 tp_features.bay_status ?
2058 (occupied ? "occupied" : "unoccupied") :
2059 "not supported");
2060 if (tp_features.bay_status2)
2061 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2062 "occupied" : "unoccupied");
2063
2064 eject = tp_features.bay_eject && occupied;
2065 eject2 = tp_features.bay_eject2 && occupied2;
2066
2067 if (eject && eject2)
2068 len += sprintf(p + len, "commands:\teject, eject2\n");
2069 else if (eject)
2070 len += sprintf(p + len, "commands:\teject\n");
2071 else if (eject2)
2072 len += sprintf(p + len, "commands:\teject2\n");
2073
2074 return len;
2075 }
2076
2077 static int bay_write(char *buf)
2078 {
2079 char *cmd;
2080
2081 if (!tp_features.bay_eject && !tp_features.bay_eject2)
2082 return -ENODEV;
2083
2084 while ((cmd = next_cmd(&buf))) {
2085 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2086 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2087 return -EIO;
2088 } else if (tp_features.bay_eject2 &&
2089 strlencmp(cmd, "eject2") == 0) {
2090 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2091 return -EIO;
2092 } else
2093 return -EINVAL;
2094 }
2095
2096 return 0;
2097 }
2098
2099 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2100 .notify = bay_notify,
2101 .handle = &bay_handle,
2102 .type = ACPI_SYSTEM_NOTIFY,
2103 };
2104
2105 static struct ibm_struct bay_driver_data = {
2106 .name = "bay",
2107 .read = bay_read,
2108 .write = bay_write,
2109 .acpi = &ibm_bay_acpidriver,
2110 };
2111
2112 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2113
2114 /*************************************************************************
2115 * CMOS subdriver
2116 */
2117
2118 /* sysfs cmos_command -------------------------------------------------- */
2119 static ssize_t cmos_command_store(struct device *dev,
2120 struct device_attribute *attr,
2121 const char *buf, size_t count)
2122 {
2123 unsigned long cmos_cmd;
2124 int res;
2125
2126 if (parse_strtoul(buf, 21, &cmos_cmd))
2127 return -EINVAL;
2128
2129 res = issue_thinkpad_cmos_command(cmos_cmd);
2130 return (res)? res : count;
2131 }
2132
2133 static struct device_attribute dev_attr_cmos_command =
2134 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2135
2136 /* --------------------------------------------------------------------- */
2137
2138 static int __init cmos_init(struct ibm_init_struct *iibm)
2139 {
2140 int res;
2141
2142 vdbg_printk(TPACPI_DBG_INIT,
2143 "initializing cmos commands subdriver\n");
2144
2145 IBM_ACPIHANDLE_INIT(cmos);
2146
2147 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2148 str_supported(cmos_handle != NULL));
2149
2150 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2151 if (res)
2152 return res;
2153
2154 return (cmos_handle)? 0 : 1;
2155 }
2156
2157 static void cmos_exit(void)
2158 {
2159 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2160 }
2161
2162 static int cmos_read(char *p)
2163 {
2164 int len = 0;
2165
2166 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2167 R30, R31, T20-22, X20-21 */
2168 if (!cmos_handle)
2169 len += sprintf(p + len, "status:\t\tnot supported\n");
2170 else {
2171 len += sprintf(p + len, "status:\t\tsupported\n");
2172 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2173 }
2174
2175 return len;
2176 }
2177
2178 static int cmos_write(char *buf)
2179 {
2180 char *cmd;
2181 int cmos_cmd, res;
2182
2183 while ((cmd = next_cmd(&buf))) {
2184 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2185 cmos_cmd >= 0 && cmos_cmd <= 21) {
2186 /* cmos_cmd set */
2187 } else
2188 return -EINVAL;
2189
2190 res = issue_thinkpad_cmos_command(cmos_cmd);
2191 if (res)
2192 return res;
2193 }
2194
2195 return 0;
2196 }
2197
2198 static struct ibm_struct cmos_driver_data = {
2199 .name = "cmos",
2200 .read = cmos_read,
2201 .write = cmos_write,
2202 .exit = cmos_exit,
2203 };
2204
2205 /*************************************************************************
2206 * LED subdriver
2207 */
2208
2209 static enum led_access_mode led_supported;
2210
2211 IBM_HANDLE(led, ec, "SLED", /* 570 */
2212 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2213 "LED", /* all others */
2214 ); /* R30, R31 */
2215
2216 static int __init led_init(struct ibm_init_struct *iibm)
2217 {
2218 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2219
2220 IBM_ACPIHANDLE_INIT(led);
2221
2222 if (!led_handle)
2223 /* led not supported on R30, R31 */
2224 led_supported = TPACPI_LED_NONE;
2225 else if (strlencmp(led_path, "SLED") == 0)
2226 /* 570 */
2227 led_supported = TPACPI_LED_570;
2228 else if (strlencmp(led_path, "SYSL") == 0)
2229 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2230 led_supported = TPACPI_LED_OLD;
2231 else
2232 /* all others */
2233 led_supported = TPACPI_LED_NEW;
2234
2235 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2236 str_supported(led_supported), led_supported);
2237
2238 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2239 }
2240
2241 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2242
2243 static int led_read(char *p)
2244 {
2245 int len = 0;
2246
2247 if (!led_supported) {
2248 len += sprintf(p + len, "status:\t\tnot supported\n");
2249 return len;
2250 }
2251 len += sprintf(p + len, "status:\t\tsupported\n");
2252
2253 if (led_supported == TPACPI_LED_570) {
2254 /* 570 */
2255 int i, status;
2256 for (i = 0; i < 8; i++) {
2257 if (!acpi_evalf(ec_handle,
2258 &status, "GLED", "dd", 1 << i))
2259 return -EIO;
2260 len += sprintf(p + len, "%d:\t\t%s\n",
2261 i, led_status(status));
2262 }
2263 }
2264
2265 len += sprintf(p + len, "commands:\t"
2266 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2267
2268 return len;
2269 }
2270
2271 /* off, on, blink */
2272 static const int led_sled_arg1[] = { 0, 1, 3 };
2273 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
2274 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
2275 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2276
2277 static int led_write(char *buf)
2278 {
2279 char *cmd;
2280 int led, ind, ret;
2281
2282 if (!led_supported)
2283 return -ENODEV;
2284
2285 while ((cmd = next_cmd(&buf))) {
2286 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2287 return -EINVAL;
2288
2289 if (strstr(cmd, "off")) {
2290 ind = 0;
2291 } else if (strstr(cmd, "on")) {
2292 ind = 1;
2293 } else if (strstr(cmd, "blink")) {
2294 ind = 2;
2295 } else
2296 return -EINVAL;
2297
2298 if (led_supported == TPACPI_LED_570) {
2299 /* 570 */
2300 led = 1 << led;
2301 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2302 led, led_sled_arg1[ind]))
2303 return -EIO;
2304 } else if (led_supported == TPACPI_LED_OLD) {
2305 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2306 led = 1 << led;
2307 ret = ec_write(TPACPI_LED_EC_HLMS, led);
2308 if (ret >= 0)
2309 ret =
2310 ec_write(TPACPI_LED_EC_HLBL,
2311 led * led_exp_hlbl[ind]);
2312 if (ret >= 0)
2313 ret =
2314 ec_write(TPACPI_LED_EC_HLCL,
2315 led * led_exp_hlcl[ind]);
2316 if (ret < 0)
2317 return ret;
2318 } else {
2319 /* all others */
2320 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2321 led, led_led_arg1[ind]))
2322 return -EIO;
2323 }
2324 }
2325
2326 return 0;
2327 }
2328
2329 static struct ibm_struct led_driver_data = {
2330 .name = "led",
2331 .read = led_read,
2332 .write = led_write,
2333 };
2334
2335 /*************************************************************************
2336 * Beep subdriver
2337 */
2338
2339 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
2340
2341 static int __init beep_init(struct ibm_init_struct *iibm)
2342 {
2343 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2344
2345 IBM_ACPIHANDLE_INIT(beep);
2346
2347 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2348 str_supported(beep_handle != NULL));
2349
2350 return (beep_handle)? 0 : 1;
2351 }
2352
2353 static int beep_read(char *p)
2354 {
2355 int len = 0;
2356
2357 if (!beep_handle)
2358 len += sprintf(p + len, "status:\t\tnot supported\n");
2359 else {
2360 len += sprintf(p + len, "status:\t\tsupported\n");
2361 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2362 }
2363
2364 return len;
2365 }
2366
2367 static int beep_write(char *buf)
2368 {
2369 char *cmd;
2370 int beep_cmd;
2371
2372 if (!beep_handle)
2373 return -ENODEV;
2374
2375 while ((cmd = next_cmd(&buf))) {
2376 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2377 beep_cmd >= 0 && beep_cmd <= 17) {
2378 /* beep_cmd set */
2379 } else
2380 return -EINVAL;
2381 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2382 return -EIO;
2383 }
2384
2385 return 0;
2386 }
2387
2388 static struct ibm_struct beep_driver_data = {
2389 .name = "beep",
2390 .read = beep_read,
2391 .write = beep_write,
2392 };
2393
2394 /*************************************************************************
2395 * Thermal subdriver
2396 */
2397
2398 static enum thermal_access_mode thermal_read_mode;
2399
2400 /* sysfs temp##_input -------------------------------------------------- */
2401
2402 static ssize_t thermal_temp_input_show(struct device *dev,
2403 struct device_attribute *attr,
2404 char *buf)
2405 {
2406 struct sensor_device_attribute *sensor_attr =
2407 to_sensor_dev_attr(attr);
2408 int idx = sensor_attr->index;
2409 s32 value;
2410 int res;
2411
2412 res = thermal_get_sensor(idx, &value);
2413 if (res)
2414 return res;
2415 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2416 return -ENXIO;
2417
2418 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2419 }
2420
2421 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2422 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2423
2424 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2425 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2426 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2427 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2428 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2429 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2430 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2431 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2432 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2433 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2434 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2435 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2436 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2437 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2438 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2439 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2440 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2441 };
2442
2443 #define THERMAL_ATTRS(X) \
2444 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2445
2446 static struct attribute *thermal_temp_input_attr[] = {
2447 THERMAL_ATTRS(8),
2448 THERMAL_ATTRS(9),
2449 THERMAL_ATTRS(10),
2450 THERMAL_ATTRS(11),
2451 THERMAL_ATTRS(12),
2452 THERMAL_ATTRS(13),
2453 THERMAL_ATTRS(14),
2454 THERMAL_ATTRS(15),
2455 THERMAL_ATTRS(0),
2456 THERMAL_ATTRS(1),
2457 THERMAL_ATTRS(2),
2458 THERMAL_ATTRS(3),
2459 THERMAL_ATTRS(4),
2460 THERMAL_ATTRS(5),
2461 THERMAL_ATTRS(6),
2462 THERMAL_ATTRS(7),
2463 NULL
2464 };
2465
2466 static const struct attribute_group thermal_temp_input16_group = {
2467 .attrs = thermal_temp_input_attr
2468 };
2469
2470 static const struct attribute_group thermal_temp_input8_group = {
2471 .attrs = &thermal_temp_input_attr[8]
2472 };
2473
2474 #undef THERMAL_SENSOR_ATTR_TEMP
2475 #undef THERMAL_ATTRS
2476
2477 /* --------------------------------------------------------------------- */
2478
2479 static int __init thermal_init(struct ibm_init_struct *iibm)
2480 {
2481 u8 t, ta1, ta2;
2482 int i;
2483 int acpi_tmp7;
2484 int res;
2485
2486 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2487
2488 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2489
2490 if (ibm_thinkpad_ec_found && experimental) {
2491 /*
2492 * Direct EC access mode: sensors at registers
2493 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2494 * non-implemented, thermal sensors return 0x80 when
2495 * not available
2496 */
2497
2498 ta1 = ta2 = 0;
2499 for (i = 0; i < 8; i++) {
2500 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2501 ta1 |= t;
2502 } else {
2503 ta1 = 0;
2504 break;
2505 }
2506 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2507 ta2 |= t;
2508 } else {
2509 ta1 = 0;
2510 break;
2511 }
2512 }
2513 if (ta1 == 0) {
2514 /* This is sheer paranoia, but we handle it anyway */
2515 if (acpi_tmp7) {
2516 printk(IBM_ERR
2517 "ThinkPad ACPI EC access misbehaving, "
2518 "falling back to ACPI TMPx access mode\n");
2519 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2520 } else {
2521 printk(IBM_ERR
2522 "ThinkPad ACPI EC access misbehaving, "
2523 "disabling thermal sensors access\n");
2524 thermal_read_mode = TPACPI_THERMAL_NONE;
2525 }
2526 } else {
2527 thermal_read_mode =
2528 (ta2 != 0) ?
2529 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2530 }
2531 } else if (acpi_tmp7) {
2532 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2533 /* 600e/x, 770e, 770x */
2534 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2535 } else {
2536 /* Standard ACPI TMPx access, max 8 sensors */
2537 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2538 }
2539 } else {
2540 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2541 thermal_read_mode = TPACPI_THERMAL_NONE;
2542 }
2543
2544 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2545 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2546 thermal_read_mode);
2547
2548 switch(thermal_read_mode) {
2549 case TPACPI_THERMAL_TPEC_16:
2550 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2551 &thermal_temp_input16_group);
2552 if (res)
2553 return res;
2554 break;
2555 case TPACPI_THERMAL_TPEC_8:
2556 case TPACPI_THERMAL_ACPI_TMP07:
2557 case TPACPI_THERMAL_ACPI_UPDT:
2558 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2559 &thermal_temp_input8_group);
2560 if (res)
2561 return res;
2562 break;
2563 case TPACPI_THERMAL_NONE:
2564 default:
2565 return 1;
2566 }
2567
2568 return 0;
2569 }
2570
2571 static void thermal_exit(void)
2572 {
2573 switch(thermal_read_mode) {
2574 case TPACPI_THERMAL_TPEC_16:
2575 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2576 &thermal_temp_input16_group);
2577 break;
2578 case TPACPI_THERMAL_TPEC_8:
2579 case TPACPI_THERMAL_ACPI_TMP07:
2580 case TPACPI_THERMAL_ACPI_UPDT:
2581 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2582 &thermal_temp_input16_group);
2583 break;
2584 case TPACPI_THERMAL_NONE:
2585 default:
2586 break;
2587 }
2588 }
2589
2590 /* idx is zero-based */
2591 static int thermal_get_sensor(int idx, s32 *value)
2592 {
2593 int t;
2594 s8 tmp;
2595 char tmpi[5];
2596
2597 t = TP_EC_THERMAL_TMP0;
2598
2599 switch (thermal_read_mode) {
2600 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2601 case TPACPI_THERMAL_TPEC_16:
2602 if (idx >= 8 && idx <= 15) {
2603 t = TP_EC_THERMAL_TMP8;
2604 idx -= 8;
2605 }
2606 /* fallthrough */
2607 #endif
2608 case TPACPI_THERMAL_TPEC_8:
2609 if (idx <= 7) {
2610 if (!acpi_ec_read(t + idx, &tmp))
2611 return -EIO;
2612 *value = tmp * 1000;
2613 return 0;
2614 }
2615 break;
2616
2617 case TPACPI_THERMAL_ACPI_UPDT:
2618 if (idx <= 7) {
2619 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2620 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2621 return -EIO;
2622 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2623 return -EIO;
2624 *value = (t - 2732) * 100;
2625 return 0;
2626 }
2627 break;
2628
2629 case TPACPI_THERMAL_ACPI_TMP07:
2630 if (idx <= 7) {
2631 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2632 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2633 return -EIO;
2634 *value = t * 1000;
2635 return 0;
2636 }
2637 break;
2638
2639 case TPACPI_THERMAL_NONE:
2640 default:
2641 return -ENOSYS;
2642 }
2643
2644 return -EINVAL;
2645 }
2646
2647 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2648 {
2649 int res, i;
2650 int n;
2651
2652 n = 8;
2653 i = 0;
2654
2655 if (!s)
2656 return -EINVAL;
2657
2658 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2659 n = 16;
2660
2661 for(i = 0 ; i < n; i++) {
2662 res = thermal_get_sensor(i, &s->temp[i]);
2663 if (res)
2664 return res;
2665 }
2666
2667 return n;
2668 }
2669
2670 static int thermal_read(char *p)
2671 {
2672 int len = 0;
2673 int n, i;
2674 struct ibm_thermal_sensors_struct t;
2675
2676 n = thermal_get_sensors(&t);
2677 if (unlikely(n < 0))
2678 return n;
2679
2680 len += sprintf(p + len, "temperatures:\t");
2681
2682 if (n > 0) {
2683 for (i = 0; i < (n - 1); i++)
2684 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2685 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2686 } else
2687 len += sprintf(p + len, "not supported\n");
2688
2689 return len;
2690 }
2691
2692 static struct ibm_struct thermal_driver_data = {
2693 .name = "thermal",
2694 .read = thermal_read,
2695 .exit = thermal_exit,
2696 };
2697
2698 /*************************************************************************
2699 * EC Dump subdriver
2700 */
2701
2702 static u8 ecdump_regs[256];
2703
2704 static int ecdump_read(char *p)
2705 {
2706 int len = 0;
2707 int i, j;
2708 u8 v;
2709
2710 len += sprintf(p + len, "EC "
2711 " +00 +01 +02 +03 +04 +05 +06 +07"
2712 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2713 for (i = 0; i < 256; i += 16) {
2714 len += sprintf(p + len, "EC 0x%02x:", i);
2715 for (j = 0; j < 16; j++) {
2716 if (!acpi_ec_read(i + j, &v))
2717 break;
2718 if (v != ecdump_regs[i + j])
2719 len += sprintf(p + len, " *%02x", v);
2720 else
2721 len += sprintf(p + len, " %02x", v);
2722 ecdump_regs[i + j] = v;
2723 }
2724 len += sprintf(p + len, "\n");
2725 if (j != 16)
2726 break;
2727 }
2728
2729 /* These are way too dangerous to advertise openly... */
2730 #if 0
2731 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2732 " (<offset> is 00-ff, <value> is 00-ff)\n");
2733 len += sprintf(p + len, "commands:\t0x<offset> <value> "
2734 " (<offset> is 00-ff, <value> is 0-255)\n");
2735 #endif
2736 return len;
2737 }
2738
2739 static int ecdump_write(char *buf)
2740 {
2741 char *cmd;
2742 int i, v;
2743
2744 while ((cmd = next_cmd(&buf))) {
2745 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2746 /* i and v set */
2747 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2748 /* i and v set */
2749 } else
2750 return -EINVAL;
2751 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2752 if (!acpi_ec_write(i, v))
2753 return -EIO;
2754 } else
2755 return -EINVAL;
2756 }
2757
2758 return 0;
2759 }
2760
2761 static struct ibm_struct ecdump_driver_data = {
2762 .name = "ecdump",
2763 .read = ecdump_read,
2764 .write = ecdump_write,
2765 .flags.experimental = 1,
2766 };
2767
2768 /*************************************************************************
2769 * Backlight/brightness subdriver
2770 */
2771
2772 static struct backlight_device *ibm_backlight_device;
2773
2774 static struct backlight_properties ibm_backlight_data = {
2775 .owner = THIS_MODULE,
2776 .get_brightness = brightness_get,
2777 .update_status = brightness_update_status,
2778 .max_brightness = 7,
2779 };
2780
2781 static int __init brightness_init(struct ibm_init_struct *iibm)
2782 {
2783 int b;
2784
2785 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2786
2787 b = brightness_get(NULL);
2788 if (b < 0)
2789 return b;
2790
2791 ibm_backlight_device = backlight_device_register(
2792 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2793 &ibm_backlight_data);
2794 if (IS_ERR(ibm_backlight_device)) {
2795 printk(IBM_ERR "Could not register backlight device\n");
2796 return PTR_ERR(ibm_backlight_device);
2797 }
2798 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2799
2800 ibm_backlight_device->props->brightness = b;
2801 brightness_update_status(ibm_backlight_device);
2802
2803 return 0;
2804 }
2805
2806 static void brightness_exit(void)
2807 {
2808 if (ibm_backlight_device) {
2809 vdbg_printk(TPACPI_DBG_EXIT,
2810 "calling backlight_device_unregister()\n");
2811 backlight_device_unregister(ibm_backlight_device);
2812 ibm_backlight_device = NULL;
2813 }
2814 }
2815
2816 static int brightness_update_status(struct backlight_device *bd)
2817 {
2818 return brightness_set(
2819 (bd->props->fb_blank == FB_BLANK_UNBLANK &&
2820 bd->props->power == FB_BLANK_UNBLANK) ?
2821 bd->props->brightness : 0);
2822 }
2823
2824 static int brightness_get(struct backlight_device *bd)
2825 {
2826 u8 level;
2827 if (!acpi_ec_read(brightness_offset, &level))
2828 return -EIO;
2829
2830 level &= 0x7;
2831
2832 return level;
2833 }
2834
2835 static int brightness_set(int value)
2836 {
2837 int cmos_cmd, inc, i;
2838 int current_value = brightness_get(NULL);
2839
2840 value &= 7;
2841
2842 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2843 inc = value > current_value ? 1 : -1;
2844 for (i = current_value; i != value; i += inc) {
2845 if (issue_thinkpad_cmos_command(cmos_cmd))
2846 return -EIO;
2847 if (!acpi_ec_write(brightness_offset, i + inc))
2848 return -EIO;
2849 }
2850
2851 return 0;
2852 }
2853
2854 static int brightness_read(char *p)
2855 {
2856 int len = 0;
2857 int level;
2858
2859 if ((level = brightness_get(NULL)) < 0) {
2860 len += sprintf(p + len, "level:\t\tunreadable\n");
2861 } else {
2862 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2863 len += sprintf(p + len, "commands:\tup, down\n");
2864 len += sprintf(p + len, "commands:\tlevel <level>"
2865 " (<level> is 0-7)\n");
2866 }
2867
2868 return len;
2869 }
2870
2871 static int brightness_write(char *buf)
2872 {
2873 int level;
2874 int new_level;
2875 char *cmd;
2876
2877 while ((cmd = next_cmd(&buf))) {
2878 if ((level = brightness_get(NULL)) < 0)
2879 return level;
2880 level &= 7;
2881
2882 if (strlencmp(cmd, "up") == 0) {
2883 new_level = level == 7 ? 7 : level + 1;
2884 } else if (strlencmp(cmd, "down") == 0) {
2885 new_level = level == 0 ? 0 : level - 1;
2886 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2887 new_level >= 0 && new_level <= 7) {
2888 /* new_level set */
2889 } else
2890 return -EINVAL;
2891
2892 brightness_set(new_level);
2893 }
2894
2895 return 0;
2896 }
2897
2898 static struct ibm_struct brightness_driver_data = {
2899 .name = "brightness",
2900 .read = brightness_read,
2901 .write = brightness_write,
2902 .exit = brightness_exit,
2903 };
2904
2905 /*************************************************************************
2906 * Volume subdriver
2907 */
2908
2909 static int volume_read(char *p)
2910 {
2911 int len = 0;
2912 u8 level;
2913
2914 if (!acpi_ec_read(volume_offset, &level)) {
2915 len += sprintf(p + len, "level:\t\tunreadable\n");
2916 } else {
2917 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2918 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2919 len += sprintf(p + len, "commands:\tup, down, mute\n");
2920 len += sprintf(p + len, "commands:\tlevel <level>"
2921 " (<level> is 0-15)\n");
2922 }
2923
2924 return len;
2925 }
2926
2927 static int volume_write(char *buf)
2928 {
2929 int cmos_cmd, inc, i;
2930 u8 level, mute;
2931 int new_level, new_mute;
2932 char *cmd;
2933
2934 while ((cmd = next_cmd(&buf))) {
2935 if (!acpi_ec_read(volume_offset, &level))
2936 return -EIO;
2937 new_mute = mute = level & 0x40;
2938 new_level = level = level & 0xf;
2939
2940 if (strlencmp(cmd, "up") == 0) {
2941 if (mute)
2942 new_mute = 0;
2943 else
2944 new_level = level == 15 ? 15 : level + 1;
2945 } else if (strlencmp(cmd, "down") == 0) {
2946 if (mute)
2947 new_mute = 0;
2948 else
2949 new_level = level == 0 ? 0 : level - 1;
2950 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2951 new_level >= 0 && new_level <= 15) {
2952 /* new_level set */
2953 } else if (strlencmp(cmd, "mute") == 0) {
2954 new_mute = 0x40;
2955 } else
2956 return -EINVAL;
2957
2958 if (new_level != level) { /* mute doesn't change */
2959 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2960 inc = new_level > level ? 1 : -1;
2961
2962 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2963 !acpi_ec_write(volume_offset, level)))
2964 return -EIO;
2965
2966 for (i = level; i != new_level; i += inc)
2967 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2968 !acpi_ec_write(volume_offset, i + inc))
2969 return -EIO;
2970
2971 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2972 !acpi_ec_write(volume_offset,
2973 new_level + mute)))
2974 return -EIO;
2975 }
2976
2977 if (new_mute != mute) { /* level doesn't change */
2978 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2979
2980 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2981 !acpi_ec_write(volume_offset, level + new_mute))
2982 return -EIO;
2983 }
2984 }
2985
2986 return 0;
2987 }
2988
2989 static struct ibm_struct volume_driver_data = {
2990 .name = "volume",
2991 .read = volume_read,
2992 .write = volume_write,
2993 };
2994
2995 /*************************************************************************
2996 * Fan subdriver
2997 */
2998
2999 /*
3000 * FAN ACCESS MODES
3001 *
3002 * TPACPI_FAN_RD_ACPI_GFAN:
3003 * ACPI GFAN method: returns fan level
3004 *
3005 * see TPACPI_FAN_WR_ACPI_SFAN
3006 * EC 0x2f (HFSP) not available if GFAN exists
3007 *
3008 * TPACPI_FAN_WR_ACPI_SFAN:
3009 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3010 *
3011 * EC 0x2f (HFSP) might be available *for reading*, but do not use
3012 * it for writing.
3013 *
3014 * TPACPI_FAN_WR_TPEC:
3015 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
3016 * Supported on almost all ThinkPads
3017 *
3018 * Fan speed changes of any sort (including those caused by the
3019 * disengaged mode) are usually done slowly by the firmware as the
3020 * maximum ammount of fan duty cycle change per second seems to be
3021 * limited.
3022 *
3023 * Reading is not available if GFAN exists.
3024 * Writing is not available if SFAN exists.
3025 *
3026 * Bits
3027 * 7 automatic mode engaged;
3028 * (default operation mode of the ThinkPad)
3029 * fan level is ignored in this mode.
3030 * 6 full speed mode (takes precedence over bit 7);
3031 * not available on all thinkpads. May disable
3032 * the tachometer while the fan controller ramps up
3033 * the speed (which can take up to a few *minutes*).
3034 * Speeds up fan to 100% duty-cycle, which is far above
3035 * the standard RPM levels. It is not impossible that
3036 * it could cause hardware damage.
3037 * 5-3 unused in some models. Extra bits for fan level
3038 * in others, but still useless as all values above
3039 * 7 map to the same speed as level 7 in these models.
3040 * 2-0 fan level (0..7 usually)
3041 * 0x00 = stop
3042 * 0x07 = max (set when temperatures critical)
3043 * Some ThinkPads may have other levels, see
3044 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3045 *
3046 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3047 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3048 * does so, its initial value is meaningless (0x07).
3049 *
3050 * For firmware bugs, refer to:
3051 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3052 *
3053 * ----
3054 *
3055 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3056 * Main fan tachometer reading (in RPM)
3057 *
3058 * This register is present on all ThinkPads with a new-style EC, and
3059 * it is known not to be present on the A21m/e, and T22, as there is
3060 * something else in offset 0x84 according to the ACPI DSDT. Other
3061 * ThinkPads from this same time period (and earlier) probably lack the
3062 * tachometer as well.
3063 *
3064 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3065 * was never fixed by IBM to report the EC firmware version string
3066 * probably support the tachometer (like the early X models), so
3067 * detecting it is quite hard. We need more data to know for sure.
3068 *
3069 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3070 * might result.
3071 *
3072 * FIRMWARE BUG: may go stale while the EC is switching to full speed
3073 * mode.
3074 *
3075 * For firmware bugs, refer to:
3076 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3077 *
3078 * TPACPI_FAN_WR_ACPI_FANS:
3079 * ThinkPad X31, X40, X41. Not available in the X60.
3080 *
3081 * FANS ACPI handle: takes three arguments: low speed, medium speed,
3082 * high speed. ACPI DSDT seems to map these three speeds to levels
3083 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3084 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3085 *
3086 * The speeds are stored on handles
3087 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3088 *
3089 * There are three default speed sets, acessible as handles:
3090 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3091 *
3092 * ACPI DSDT switches which set is in use depending on various
3093 * factors.
3094 *
3095 * TPACPI_FAN_WR_TPEC is also available and should be used to
3096 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
3097 * but the ACPI tables just mention level 7.
3098 */
3099
3100 static enum fan_status_access_mode fan_status_access_mode;
3101 static enum fan_control_access_mode fan_control_access_mode;
3102 static enum fan_control_commands fan_control_commands;
3103
3104 static u8 fan_control_initial_status;
3105 static u8 fan_control_desired_level;
3106
3107 static void fan_watchdog_fire(struct work_struct *ignored);
3108 static int fan_watchdog_maxinterval;
3109 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3110
3111 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
3112 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
3113 "\\FSPD", /* 600e/x, 770e, 770x */
3114 ); /* all others */
3115 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
3116 "JFNS", /* 770x-JL */
3117 ); /* all others */
3118
3119 /*
3120 * SYSFS fan layout: hwmon compatible (device)
3121 *
3122 * pwm*_enable:
3123 * 0: "disengaged" mode
3124 * 1: manual mode
3125 * 2: native EC "auto" mode (recommended, hardware default)
3126 *
3127 * pwm*: set speed in manual mode, ignored otherwise.
3128 * 0 is level 0; 255 is level 7. Intermediate points done with linear
3129 * interpolation.
3130 *
3131 * fan*_input: tachometer reading, RPM
3132 *
3133 *
3134 * SYSFS fan layout: extensions
3135 *
3136 * fan_watchdog (driver):
3137 * fan watchdog interval in seconds, 0 disables (default), max 120
3138 */
3139
3140 /* sysfs fan pwm1_enable ----------------------------------------------- */
3141 static ssize_t fan_pwm1_enable_show(struct device *dev,
3142 struct device_attribute *attr,
3143 char *buf)
3144 {
3145 int res, mode;
3146 u8 status;
3147
3148 res = fan_get_status_safe(&status);
3149 if (res)
3150 return res;
3151
3152 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3153 if (status != fan_control_initial_status) {
3154 tp_features.fan_ctrl_status_undef = 0;
3155 } else {
3156 /* Return most likely status. In fact, it
3157 * might be the only possible status */
3158 status = TP_EC_FAN_AUTO;
3159 }
3160 }
3161
3162 if (status & TP_EC_FAN_FULLSPEED) {
3163 mode = 0;
3164 } else if (status & TP_EC_FAN_AUTO) {
3165 mode = 2;
3166 } else
3167 mode = 1;
3168
3169 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3170 }
3171
3172 static ssize_t fan_pwm1_enable_store(struct device *dev,
3173 struct device_attribute *attr,
3174 const char *buf, size_t count)
3175 {
3176 unsigned long t;
3177 int res, level;
3178
3179 if (parse_strtoul(buf, 2, &t))
3180 return -EINVAL;
3181
3182 switch (t) {
3183 case 0:
3184 level = TP_EC_FAN_FULLSPEED;
3185 break;
3186 case 1:
3187 level = TPACPI_FAN_LAST_LEVEL;
3188 break;
3189 case 2:
3190 level = TP_EC_FAN_AUTO;
3191 break;
3192 case 3:
3193 /* reserved for software-controlled auto mode */
3194 return -ENOSYS;
3195 default:
3196 return -EINVAL;
3197 }
3198
3199 res = fan_set_level_safe(level);
3200 if (res == -ENXIO)
3201 return -EINVAL;
3202 else if (res < 0)
3203 return res;
3204
3205 fan_watchdog_reset();
3206
3207 return count;
3208 }
3209
3210 static struct device_attribute dev_attr_fan_pwm1_enable =
3211 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3212 fan_pwm1_enable_show, fan_pwm1_enable_store);
3213
3214 /* sysfs fan pwm1 ------------------------------------------------------ */
3215 static ssize_t fan_pwm1_show(struct device *dev,
3216 struct device_attribute *attr,
3217 char *buf)
3218 {
3219 int res;
3220 u8 status;
3221
3222 res = fan_get_status_safe(&status);
3223 if (res)
3224 return res;
3225
3226 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3227 if (status != fan_control_initial_status) {
3228 tp_features.fan_ctrl_status_undef = 0;
3229 } else {
3230 status = TP_EC_FAN_AUTO;
3231 }
3232 }
3233
3234 if ((status &
3235 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3236 status = fan_control_desired_level;
3237
3238 if (status > 7)
3239 status = 7;
3240
3241 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3242 }
3243
3244 static ssize_t fan_pwm1_store(struct device *dev,
3245 struct device_attribute *attr,
3246 const char *buf, size_t count)
3247 {
3248 unsigned long s;
3249 int rc;
3250 u8 status, newlevel;
3251
3252 if (parse_strtoul(buf, 255, &s))
3253 return -EINVAL;
3254
3255 /* scale down from 0-255 to 0-7 */
3256 newlevel = (s >> 5) & 0x07;
3257
3258 rc = mutex_lock_interruptible(&fan_mutex);
3259 if (rc < 0)
3260 return rc;
3261
3262 rc = fan_get_status(&status);
3263 if (!rc && (status &
3264 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3265 rc = fan_set_level(newlevel);
3266 if (rc == -ENXIO)
3267 rc = -EINVAL;
3268 else if (!rc) {
3269 fan_update_desired_level(newlevel);
3270 fan_watchdog_reset();
3271 }
3272 }
3273
3274 mutex_unlock(&fan_mutex);
3275 return (rc)? rc : count;
3276 }
3277
3278 static struct device_attribute dev_attr_fan_pwm1 =
3279 __ATTR(pwm1, S_IWUSR | S_IRUGO,
3280 fan_pwm1_show, fan_pwm1_store);
3281
3282 /* sysfs fan fan1_input ------------------------------------------------ */
3283 static ssize_t fan_fan1_input_show(struct device *dev,
3284 struct device_attribute *attr,
3285 char *buf)
3286 {
3287 int res;
3288 unsigned int speed;
3289
3290 res = fan_get_speed(&speed);
3291 if (res < 0)
3292 return res;
3293
3294 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3295 }
3296
3297 static struct device_attribute dev_attr_fan_fan1_input =
3298 __ATTR(fan1_input, S_IRUGO,
3299 fan_fan1_input_show, NULL);
3300
3301 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3302 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3303 char *buf)
3304 {
3305 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3306 }
3307
3308 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3309 const char *buf, size_t count)
3310 {
3311 unsigned long t;
3312
3313 if (parse_strtoul(buf, 120, &t))
3314 return -EINVAL;
3315
3316 if (!fan_control_allowed)
3317 return -EPERM;
3318
3319 fan_watchdog_maxinterval = t;
3320 fan_watchdog_reset();
3321
3322 return count;
3323 }
3324
3325 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3326 fan_fan_watchdog_show, fan_fan_watchdog_store);
3327
3328 /* --------------------------------------------------------------------- */
3329 static struct attribute *fan_attributes[] = {
3330 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3331 &dev_attr_fan_fan1_input.attr,
3332 NULL
3333 };
3334
3335 static const struct attribute_group fan_attr_group = {
3336 .attrs = fan_attributes,
3337 };
3338
3339 static int __init fan_init(struct ibm_init_struct *iibm)
3340 {
3341 int rc;
3342
3343 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3344
3345 mutex_init(&fan_mutex);
3346 fan_status_access_mode = TPACPI_FAN_NONE;
3347 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3348 fan_control_commands = 0;
3349 fan_watchdog_maxinterval = 0;
3350 tp_features.fan_ctrl_status_undef = 0;
3351 fan_control_desired_level = 7;
3352
3353 IBM_ACPIHANDLE_INIT(fans);
3354 IBM_ACPIHANDLE_INIT(gfan);
3355 IBM_ACPIHANDLE_INIT(sfan);
3356
3357 if (gfan_handle) {
3358 /* 570, 600e/x, 770e, 770x */
3359 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3360 } else {
3361 /* all other ThinkPads: note that even old-style
3362 * ThinkPad ECs supports the fan control register */
3363 if (likely(acpi_ec_read(fan_status_offset,
3364 &fan_control_initial_status))) {
3365 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3366
3367 /* In some ThinkPads, neither the EC nor the ACPI
3368 * DSDT initialize the fan status, and it ends up
3369 * being set to 0x07 when it *could* be either
3370 * 0x07 or 0x80.
3371 *
3372 * Enable for TP-1Y (T43), TP-78 (R51e),
3373 * TP-76 (R52), TP-70 (T43, R52), which are known
3374 * to be buggy. */
3375 if (fan_control_initial_status == 0x07 &&
3376 ibm_thinkpad_ec_found &&
3377 ((ibm_thinkpad_ec_found[0] == '1' &&
3378 ibm_thinkpad_ec_found[1] == 'Y') ||
3379 (ibm_thinkpad_ec_found[0] == '7' &&
3380 (ibm_thinkpad_ec_found[1] == '6' ||
3381 ibm_thinkpad_ec_found[1] == '8' ||
3382 ibm_thinkpad_ec_found[1] == '0'))
3383 )) {
3384 printk(IBM_NOTICE
3385 "fan_init: initial fan status is "
3386 "unknown, assuming it is in auto "
3387 "mode\n");
3388 tp_features.fan_ctrl_status_undef = 1;
3389 }
3390 } else {
3391 printk(IBM_ERR
3392 "ThinkPad ACPI EC access misbehaving, "
3393 "fan status and control unavailable\n");
3394 return 1;
3395 }
3396 }
3397
3398 if (sfan_handle) {
3399 /* 570, 770x-JL */
3400 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3401 fan_control_commands |=
3402 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3403 } else {
3404 if (!gfan_handle) {
3405 /* gfan without sfan means no fan control */
3406 /* all other models implement TP EC 0x2f control */
3407
3408 if (fans_handle) {
3409 /* X31, X40, X41 */
3410 fan_control_access_mode =
3411 TPACPI_FAN_WR_ACPI_FANS;
3412 fan_control_commands |=
3413 TPACPI_FAN_CMD_SPEED |
3414 TPACPI_FAN_CMD_LEVEL |
3415 TPACPI_FAN_CMD_ENABLE;
3416 } else {
3417 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3418 fan_control_commands |=
3419 TPACPI_FAN_CMD_LEVEL |
3420 TPACPI_FAN_CMD_ENABLE;
3421 }
3422 }
3423 }
3424
3425 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3426 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3427 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3428 fan_status_access_mode, fan_control_access_mode);
3429
3430 /* fan control master switch */
3431 if (!fan_control_allowed) {
3432 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3433 fan_control_commands = 0;
3434 dbg_printk(TPACPI_DBG_INIT,
3435 "fan control features disabled by parameter\n");
3436 }
3437
3438 /* update fan_control_desired_level */
3439 if (fan_status_access_mode != TPACPI_FAN_NONE)
3440 fan_get_status_safe(NULL);
3441
3442 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3443 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3444 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3445 &fan_attr_group);
3446 if (!(rc < 0))
3447 rc = driver_create_file(&tpacpi_pdriver.driver,
3448 &driver_attr_fan_watchdog);
3449 if (rc < 0)
3450 return rc;
3451 return 0;
3452 } else
3453 return 1;
3454 }
3455
3456 /*
3457 * Call with fan_mutex held
3458 */
3459 static void fan_update_desired_level(u8 status)
3460 {
3461 if ((status &
3462 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3463 if (status > 7)
3464 fan_control_desired_level = 7;
3465 else
3466 fan_control_desired_level = status;
3467 }
3468 }
3469
3470 static int fan_get_status(u8 *status)
3471 {
3472 u8 s;
3473
3474 /* TODO:
3475 * Add TPACPI_FAN_RD_ACPI_FANS ? */
3476
3477 switch (fan_status_access_mode) {
3478 case TPACPI_FAN_RD_ACPI_GFAN:
3479 /* 570, 600e/x, 770e, 770x */
3480
3481 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3482 return -EIO;
3483
3484 if (likely(status))
3485 *status = s & 0x07;
3486
3487 break;
3488
3489 case TPACPI_FAN_RD_TPEC:
3490 /* all except 570, 600e/x, 770e, 770x */
3491 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3492 return -EIO;
3493
3494 if (likely(status))
3495 *status = s;
3496
3497 break;
3498
3499 default:
3500 return -ENXIO;
3501 }
3502
3503 return 0;
3504 }
3505
3506 static int fan_get_status_safe(u8 *status)
3507 {
3508 int rc;
3509 u8 s;
3510
3511 rc = mutex_lock_interruptible(&fan_mutex);
3512 if (rc < 0)
3513 return rc;
3514 rc = fan_get_status(&s);
3515 if (!rc)
3516 fan_update_desired_level(s);
3517 mutex_unlock(&fan_mutex);
3518
3519 if (status)
3520 *status = s;
3521
3522 return rc;
3523 }
3524
3525 static void fan_exit(void)
3526 {
3527 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3528
3529 /* FIXME: can we really do this unconditionally? */
3530 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3531 driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3532
3533 cancel_delayed_work(&fan_watchdog_task);
3534 flush_scheduled_work();
3535 }
3536
3537 static int fan_get_speed(unsigned int *speed)
3538 {
3539 u8 hi, lo;
3540
3541 switch (fan_status_access_mode) {
3542 case TPACPI_FAN_RD_TPEC:
3543 /* all except 570, 600e/x, 770e, 770x */
3544 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3545 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3546 return -EIO;
3547
3548 if (likely(speed))
3549 *speed = (hi << 8) | lo;
3550
3551 break;
3552
3553 default:
3554 return -ENXIO;
3555 }
3556
3557 return 0;
3558 }
3559
3560 static void fan_watchdog_fire(struct work_struct *ignored)
3561 {
3562 int rc;
3563
3564 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3565 rc = fan_set_enable();
3566 if (rc < 0) {
3567 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3568 "will try again later...\n", -rc);
3569 /* reschedule for later */
3570 fan_watchdog_reset();
3571 }
3572 }
3573
3574 static void fan_watchdog_reset(void)
3575 {
3576 static int fan_watchdog_active;
3577
3578 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3579 return;
3580
3581 if (fan_watchdog_active)
3582 cancel_delayed_work(&fan_watchdog_task);
3583
3584 if (fan_watchdog_maxinterval > 0) {
3585 fan_watchdog_active = 1;
3586 if (!schedule_delayed_work(&fan_watchdog_task,
3587 msecs_to_jiffies(fan_watchdog_maxinterval
3588 * 1000))) {
3589 printk(IBM_ERR "failed to schedule the fan watchdog, "
3590 "watchdog will not trigger\n");
3591 }
3592 } else
3593 fan_watchdog_active = 0;
3594 }
3595
3596 static int fan_set_level(int level)
3597 {
3598 if (!fan_control_allowed)
3599 return -EPERM;
3600
3601 switch (fan_control_access_mode) {
3602 case TPACPI_FAN_WR_ACPI_SFAN:
3603 if (level >= 0 && level <= 7) {
3604 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3605 return -EIO;
3606 } else
3607 return -EINVAL;
3608 break;
3609
3610 case TPACPI_FAN_WR_ACPI_FANS:
3611 case TPACPI_FAN_WR_TPEC:
3612 if ((level != TP_EC_FAN_AUTO) &&
3613 (level != TP_EC_FAN_FULLSPEED) &&
3614 ((level < 0) || (level > 7)))
3615 return -EINVAL;
3616
3617 /* safety net should the EC not support AUTO
3618 * or FULLSPEED mode bits and just ignore them */
3619 if (level & TP_EC_FAN_FULLSPEED)
3620 level |= 7; /* safety min speed 7 */
3621 else if (level & TP_EC_FAN_FULLSPEED)
3622 level |= 4; /* safety min speed 4 */
3623
3624 if (!acpi_ec_write(fan_status_offset, level))
3625 return -EIO;
3626 else
3627 tp_features.fan_ctrl_status_undef = 0;
3628 break;
3629
3630 default:
3631 return -ENXIO;
3632 }
3633 return 0;
3634 }
3635
3636 static int fan_set_level_safe(int level)
3637 {
3638 int rc;
3639
3640 if (!fan_control_allowed)
3641 return -EPERM;
3642
3643 rc = mutex_lock_interruptible(&fan_mutex);
3644 if (rc < 0)
3645 return rc;
3646
3647 if (level == TPACPI_FAN_LAST_LEVEL)
3648 level = fan_control_desired_level;
3649
3650 rc = fan_set_level(level);
3651 if (!rc)
3652 fan_update_desired_level(level);
3653
3654 mutex_unlock(&fan_mutex);
3655 return rc;
3656 }
3657
3658 static int fan_set_enable(void)
3659 {
3660 u8 s;
3661 int rc;
3662
3663 if (!fan_control_allowed)
3664 return -EPERM;
3665
3666 rc = mutex_lock_interruptible(&fan_mutex);
3667 if (rc < 0)
3668 return rc;
3669
3670 switch (fan_control_access_mode) {
3671 case TPACPI_FAN_WR_ACPI_FANS:
3672 case TPACPI_FAN_WR_TPEC:
3673 rc = fan_get_status(&s);
3674 if (rc < 0)
3675 break;
3676
3677 /* Don't go out of emergency fan mode */
3678 if (s != 7) {
3679 s &= 0x07;
3680 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3681 }
3682
3683 if (!acpi_ec_write(fan_status_offset, s))
3684 rc = -EIO;
3685 else {
3686 tp_features.fan_ctrl_status_undef = 0;
3687 rc = 0;
3688 }
3689 break;
3690
3691 case TPACPI_FAN_WR_ACPI_SFAN:
3692 rc = fan_get_status(&s);
3693 if (rc < 0)
3694 break;
3695
3696 s &= 0x07;
3697
3698 /* Set fan to at least level 4 */
3699 s |= 4;
3700
3701 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3702 rc= -EIO;
3703 else
3704 rc = 0;
3705 break;
3706
3707 default:
3708 rc = -ENXIO;
3709 }
3710
3711 mutex_unlock(&fan_mutex);
3712 return rc;
3713 }
3714
3715 static int fan_set_disable(void)
3716 {
3717 int rc;
3718
3719 if (!fan_control_allowed)
3720 return -EPERM;
3721
3722 rc = mutex_lock_interruptible(&fan_mutex);
3723 if (rc < 0)
3724 return rc;
3725
3726 rc = 0;
3727 switch (fan_control_access_mode) {
3728 case TPACPI_FAN_WR_ACPI_FANS:
3729 case TPACPI_FAN_WR_TPEC:
3730 if (!acpi_ec_write(fan_status_offset, 0x00))
3731 rc = -EIO;
3732 else {
3733 fan_control_desired_level = 0;
3734 tp_features.fan_ctrl_status_undef = 0;
3735 }
3736 break;
3737
3738 case TPACPI_FAN_WR_ACPI_SFAN:
3739 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
3740 rc = -EIO;
3741 else
3742 fan_control_desired_level = 0;
3743 break;
3744
3745 default:
3746 rc = -ENXIO;
3747 }
3748
3749
3750 mutex_unlock(&fan_mutex);
3751 return rc;
3752 }
3753
3754 static int fan_set_speed(int speed)
3755 {
3756 int rc;
3757
3758 if (!fan_control_allowed)
3759 return -EPERM;
3760
3761 rc = mutex_lock_interruptible(&fan_mutex);
3762 if (rc < 0)
3763 return rc;
3764
3765 rc = 0;
3766 switch (fan_control_access_mode) {
3767 case TPACPI_FAN_WR_ACPI_FANS:
3768 if (speed >= 0 && speed <= 65535) {
3769 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3770 speed, speed, speed))
3771 rc = -EIO;
3772 } else
3773 rc = -EINVAL;
3774 break;
3775
3776 default:
3777 rc = -ENXIO;
3778 }
3779
3780 mutex_unlock(&fan_mutex);
3781 return rc;
3782 }
3783
3784 static int fan_read(char *p)
3785 {
3786 int len = 0;
3787 int rc;
3788 u8 status;
3789 unsigned int speed = 0;
3790
3791 switch (fan_status_access_mode) {
3792 case TPACPI_FAN_RD_ACPI_GFAN:
3793 /* 570, 600e/x, 770e, 770x */
3794 if ((rc = fan_get_status_safe(&status)) < 0)
3795 return rc;
3796
3797 len += sprintf(p + len, "status:\t\t%s\n"
3798 "level:\t\t%d\n",
3799 (status != 0) ? "enabled" : "disabled", status);
3800 break;
3801
3802 case TPACPI_FAN_RD_TPEC:
3803 /* all except 570, 600e/x, 770e, 770x */
3804 if ((rc = fan_get_status_safe(&status)) < 0)
3805 return rc;
3806
3807 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3808 if (status != fan_control_initial_status)
3809 tp_features.fan_ctrl_status_undef = 0;
3810 else
3811 /* Return most likely status. In fact, it
3812 * might be the only possible status */
3813 status = TP_EC_FAN_AUTO;
3814 }
3815
3816 len += sprintf(p + len, "status:\t\t%s\n",
3817 (status != 0) ? "enabled" : "disabled");
3818
3819 if ((rc = fan_get_speed(&speed)) < 0)
3820 return rc;
3821
3822 len += sprintf(p + len, "speed:\t\t%d\n", speed);
3823
3824 if (status & TP_EC_FAN_FULLSPEED)
3825 /* Disengaged mode takes precedence */
3826 len += sprintf(p + len, "level:\t\tdisengaged\n");
3827 else if (status & TP_EC_FAN_AUTO)
3828 len += sprintf(p + len, "level:\t\tauto\n");
3829 else
3830 len += sprintf(p + len, "level:\t\t%d\n", status);
3831 break;
3832
3833 case TPACPI_FAN_NONE:
3834 default:
3835 len += sprintf(p + len, "status:\t\tnot supported\n");
3836 }
3837
3838 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
3839 len += sprintf(p + len, "commands:\tlevel <level>");
3840
3841 switch (fan_control_access_mode) {
3842 case TPACPI_FAN_WR_ACPI_SFAN:
3843 len += sprintf(p + len, " (<level> is 0-7)\n");
3844 break;
3845
3846 default:
3847 len += sprintf(p + len, " (<level> is 0-7, "
3848 "auto, disengaged, full-speed)\n");
3849 break;
3850 }
3851 }
3852
3853 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
3854 len += sprintf(p + len, "commands:\tenable, disable\n"
3855 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
3856 "1-120 (seconds))\n");
3857
3858 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
3859 len += sprintf(p + len, "commands:\tspeed <speed>"
3860 " (<speed> is 0-65535)\n");
3861
3862 return len;
3863 }
3864
3865 static int fan_write_cmd_level(const char *cmd, int *rc)
3866 {
3867 int level;
3868
3869 if (strlencmp(cmd, "level auto") == 0)
3870 level = TP_EC_FAN_AUTO;
3871 else if ((strlencmp(cmd, "level disengaged") == 0) |
3872 (strlencmp(cmd, "level full-speed") == 0))
3873 level = TP_EC_FAN_FULLSPEED;
3874 else if (sscanf(cmd, "level %d", &level) != 1)
3875 return 0;
3876
3877 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
3878 printk(IBM_ERR "level command accepted for unsupported "
3879 "access mode %d", fan_control_access_mode);
3880
3881 return 1;
3882 }
3883
3884 static int fan_write_cmd_enable(const char *cmd, int *rc)
3885 {
3886 if (strlencmp(cmd, "enable") != 0)
3887 return 0;
3888
3889 if ((*rc = fan_set_enable()) == -ENXIO)
3890 printk(IBM_ERR "enable command accepted for unsupported "
3891 "access mode %d", fan_control_access_mode);
3892
3893 return 1;
3894 }
3895
3896 static int fan_write_cmd_disable(const char *cmd, int *rc)
3897 {
3898 if (strlencmp(cmd, "disable") != 0)
3899 return 0;
3900
3901 if ((*rc = fan_set_disable()) == -ENXIO)
3902 printk(IBM_ERR "disable command accepted for unsupported "
3903 "access mode %d", fan_control_access_mode);
3904
3905 return 1;
3906 }
3907
3908 static int fan_write_cmd_speed(const char *cmd, int *rc)
3909 {
3910 int speed;
3911
3912 /* TODO:
3913 * Support speed <low> <medium> <high> ? */
3914
3915 if (sscanf(cmd, "speed %d", &speed) != 1)
3916 return 0;
3917
3918 if ((*rc = fan_set_speed(speed)) == -ENXIO)
3919 printk(IBM_ERR "speed command accepted for unsupported "
3920 "access mode %d", fan_control_access_mode);
3921
3922 return 1;
3923 }
3924
3925 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
3926 {
3927 int interval;
3928
3929 if (sscanf(cmd, "watchdog %d", &interval) != 1)
3930 return 0;
3931
3932 if (interval < 0 || interval > 120)
3933 *rc = -EINVAL;
3934 else
3935 fan_watchdog_maxinterval = interval;
3936
3937 return 1;
3938 }
3939
3940 static int fan_write(char *buf)
3941 {
3942 char *cmd;
3943 int rc = 0;
3944
3945 while (!rc && (cmd = next_cmd(&buf))) {
3946 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
3947 fan_write_cmd_level(cmd, &rc)) &&
3948 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
3949 (fan_write_cmd_enable(cmd, &rc) ||
3950 fan_write_cmd_disable(cmd, &rc) ||
3951 fan_write_cmd_watchdog(cmd, &rc))) &&
3952 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
3953 fan_write_cmd_speed(cmd, &rc))
3954 )
3955 rc = -EINVAL;
3956 else if (!rc)
3957 fan_watchdog_reset();
3958 }
3959
3960 return rc;
3961 }
3962
3963 static struct ibm_struct fan_driver_data = {
3964 .name = "fan",
3965 .read = fan_read,
3966 .write = fan_write,
3967 .exit = fan_exit,
3968 };
3969
3970 /****************************************************************************
3971 ****************************************************************************
3972 *
3973 * Infrastructure
3974 *
3975 ****************************************************************************
3976 ****************************************************************************/
3977
3978 /* /proc support */
3979 static struct proc_dir_entry *proc_dir;
3980
3981 /* Subdriver registry */
3982 static LIST_HEAD(tpacpi_all_drivers);
3983
3984
3985 /*
3986 * Module and infrastructure proble, init and exit handling
3987 */
3988
3989 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
3990 static const char * __init str_supported(int is_supported)
3991 {
3992 static char text_unsupported[] __initdata = "not supported";
3993
3994 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
3995 }
3996 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3997
3998 static int __init ibm_init(struct ibm_init_struct *iibm)
3999 {
4000 int ret;
4001 struct ibm_struct *ibm = iibm->data;
4002 struct proc_dir_entry *entry;
4003
4004 BUG_ON(ibm == NULL);
4005
4006 INIT_LIST_HEAD(&ibm->all_drivers);
4007
4008 if (ibm->flags.experimental && !experimental)
4009 return 0;
4010
4011 dbg_printk(TPACPI_DBG_INIT,
4012 "probing for %s\n", ibm->name);
4013
4014 if (iibm->init) {
4015 ret = iibm->init(iibm);
4016 if (ret > 0)
4017 return 0; /* probe failed */
4018 if (ret)
4019 return ret;
4020
4021 ibm->flags.init_called = 1;
4022 }
4023
4024 if (ibm->acpi) {
4025 if (ibm->acpi->hid) {
4026 ret = register_tpacpi_subdriver(ibm);
4027 if (ret)
4028 goto err_out;
4029 }
4030
4031 if (ibm->acpi->notify) {
4032 ret = setup_acpi_notify(ibm);
4033 if (ret == -ENODEV) {
4034 printk(IBM_NOTICE "disabling subdriver %s\n",
4035 ibm->name);
4036 ret = 0;
4037 goto err_out;
4038 }
4039 if (ret < 0)
4040 goto err_out;
4041 }
4042 }
4043
4044 dbg_printk(TPACPI_DBG_INIT,
4045 "%s installed\n", ibm->name);
4046
4047 if (ibm->read) {
4048 entry = create_proc_entry(ibm->name,
4049 S_IFREG | S_IRUGO | S_IWUSR,
4050 proc_dir);
4051 if (!entry) {
4052 printk(IBM_ERR "unable to create proc entry %s\n",
4053 ibm->name);
4054 ret = -ENODEV;
4055 goto err_out;
4056 }
4057 entry->owner = THIS_MODULE;
4058 entry->data = ibm;
4059 entry->read_proc = &dispatch_procfs_read;
4060 if (ibm->write)
4061 entry->write_proc = &dispatch_procfs_write;
4062 ibm->flags.proc_created = 1;
4063 }
4064
4065 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4066
4067 return 0;
4068
4069 err_out:
4070 dbg_printk(TPACPI_DBG_INIT,
4071 "%s: at error exit path with result %d\n",
4072 ibm->name, ret);
4073
4074 ibm_exit(ibm);
4075 return (ret < 0)? ret : 0;
4076 }
4077
4078 static void ibm_exit(struct ibm_struct *ibm)
4079 {
4080 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4081
4082 list_del_init(&ibm->all_drivers);
4083
4084 if (ibm->flags.acpi_notify_installed) {
4085 dbg_printk(TPACPI_DBG_EXIT,
4086 "%s: acpi_remove_notify_handler\n", ibm->name);
4087 BUG_ON(!ibm->acpi);
4088 acpi_remove_notify_handler(*ibm->acpi->handle,
4089 ibm->acpi->type,
4090 dispatch_acpi_notify);
4091 ibm->flags.acpi_notify_installed = 0;
4092 ibm->flags.acpi_notify_installed = 0;
4093 }
4094
4095 if (ibm->flags.proc_created) {
4096 dbg_printk(TPACPI_DBG_EXIT,
4097 "%s: remove_proc_entry\n", ibm->name);
4098 remove_proc_entry(ibm->name, proc_dir);
4099 ibm->flags.proc_created = 0;
4100 }
4101
4102 if (ibm->flags.acpi_driver_registered) {
4103 dbg_printk(TPACPI_DBG_EXIT,
4104 "%s: acpi_bus_unregister_driver\n", ibm->name);
4105 BUG_ON(!ibm->acpi);
4106 acpi_bus_unregister_driver(ibm->acpi->driver);
4107 kfree(ibm->acpi->driver);
4108 ibm->acpi->driver = NULL;
4109 ibm->flags.acpi_driver_registered = 0;
4110 }
4111
4112 if (ibm->flags.init_called && ibm->exit) {
4113 ibm->exit();
4114 ibm->flags.init_called = 0;
4115 }
4116
4117 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4118 }
4119
4120 /* Probing */
4121
4122 static char *ibm_thinkpad_ec_found;
4123
4124 static char* __init check_dmi_for_ec(void)
4125 {
4126 struct dmi_device *dev = NULL;
4127 char ec_fw_string[18];
4128
4129 /*
4130 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4131 * X32 or newer, all Z series; Some models must have an
4132 * up-to-date BIOS or they will not be detected.
4133 *
4134 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4135 */
4136 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4137 if (sscanf(dev->name,
4138 "IBM ThinkPad Embedded Controller -[%17c",
4139 ec_fw_string) == 1) {
4140 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4141 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4142 return kstrdup(ec_fw_string, GFP_KERNEL);
4143 }
4144 }
4145 return NULL;
4146 }
4147
4148 static int __init probe_for_thinkpad(void)
4149 {
4150 int is_thinkpad;
4151
4152 if (acpi_disabled)
4153 return -ENODEV;
4154
4155 /*
4156 * Non-ancient models have better DMI tagging, but very old models
4157 * don't.
4158 */
4159 is_thinkpad = dmi_name_in_vendors("ThinkPad");
4160
4161 /* ec is required because many other handles are relative to it */
4162 IBM_ACPIHANDLE_INIT(ec);
4163 if (!ec_handle) {
4164 if (is_thinkpad)
4165 printk(IBM_ERR
4166 "Not yet supported ThinkPad detected!\n");
4167 return -ENODEV;
4168 }
4169
4170 /*
4171 * Risks a regression on very old machines, but reduces potential
4172 * false positives a damn great deal
4173 */
4174 if (!is_thinkpad)
4175 is_thinkpad = dmi_name_in_vendors("IBM");
4176
4177 if (!is_thinkpad && !force_load)
4178 return -ENODEV;
4179
4180 return 0;
4181 }
4182
4183
4184 /* Module init, exit, parameters */
4185
4186 static struct ibm_init_struct ibms_init[] __initdata = {
4187 {
4188 .init = thinkpad_acpi_driver_init,
4189 .data = &thinkpad_acpi_driver_data,
4190 },
4191 {
4192 .init = hotkey_init,
4193 .data = &hotkey_driver_data,
4194 },
4195 {
4196 .init = bluetooth_init,
4197 .data = &bluetooth_driver_data,
4198 },
4199 {
4200 .init = wan_init,
4201 .data = &wan_driver_data,
4202 },
4203 {
4204 .init = video_init,
4205 .data = &video_driver_data,
4206 },
4207 {
4208 .init = light_init,
4209 .data = &light_driver_data,
4210 },
4211 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4212 {
4213 .init = dock_init,
4214 .data = &dock_driver_data[0],
4215 },
4216 {
4217 .init = dock_init2,
4218 .data = &dock_driver_data[1],
4219 },
4220 #endif
4221 #ifdef CONFIG_THINKPAD_ACPI_BAY
4222 {
4223 .init = bay_init,
4224 .data = &bay_driver_data,
4225 },
4226 #endif
4227 {
4228 .init = cmos_init,
4229 .data = &cmos_driver_data,
4230 },
4231 {
4232 .init = led_init,
4233 .data = &led_driver_data,
4234 },
4235 {
4236 .init = beep_init,
4237 .data = &beep_driver_data,
4238 },
4239 {
4240 .init = thermal_init,
4241 .data = &thermal_driver_data,
4242 },
4243 {
4244 .data = &ecdump_driver_data,
4245 },
4246 {
4247 .init = brightness_init,
4248 .data = &brightness_driver_data,
4249 },
4250 {
4251 .data = &volume_driver_data,
4252 },
4253 {
4254 .init = fan_init,
4255 .data = &fan_driver_data,
4256 },
4257 };
4258
4259 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4260 {
4261 unsigned int i;
4262 struct ibm_struct *ibm;
4263
4264 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4265 ibm = ibms_init[i].data;
4266 BUG_ON(ibm == NULL);
4267
4268 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4269 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4270 return -ENOSPC;
4271 strcpy(ibms_init[i].param, val);
4272 strcat(ibms_init[i].param, ",");
4273 return 0;
4274 }
4275 }
4276
4277 return -EINVAL;
4278 }
4279
4280 static int experimental;
4281 module_param(experimental, int, 0);
4282
4283 static u32 dbg_level;
4284 module_param_named(debug, dbg_level, uint, 0);
4285
4286 static int force_load;
4287 module_param(force_load, int, 0);
4288
4289 static int fan_control_allowed;
4290 module_param_named(fan_control, fan_control_allowed, int, 0);
4291
4292 #define IBM_PARAM(feature) \
4293 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4294
4295 IBM_PARAM(hotkey);
4296 IBM_PARAM(bluetooth);
4297 IBM_PARAM(video);
4298 IBM_PARAM(light);
4299 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4300 IBM_PARAM(dock);
4301 #endif
4302 #ifdef CONFIG_THINKPAD_ACPI_BAY
4303 IBM_PARAM(bay);
4304 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4305 IBM_PARAM(cmos);
4306 IBM_PARAM(led);
4307 IBM_PARAM(beep);
4308 IBM_PARAM(ecdump);
4309 IBM_PARAM(brightness);
4310 IBM_PARAM(volume);
4311 IBM_PARAM(fan);
4312
4313 static int __init thinkpad_acpi_module_init(void)
4314 {
4315 int ret, i;
4316
4317 /* Driver-level probe */
4318 ret = probe_for_thinkpad();
4319 if (ret)
4320 return ret;
4321
4322 /* Driver initialization */
4323 ibm_thinkpad_ec_found = check_dmi_for_ec();
4324 IBM_ACPIHANDLE_INIT(ecrd);
4325 IBM_ACPIHANDLE_INIT(ecwr);
4326
4327 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4328 if (!proc_dir) {
4329 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4330 thinkpad_acpi_module_exit();
4331 return -ENODEV;
4332 }
4333 proc_dir->owner = THIS_MODULE;
4334
4335 ret = platform_driver_register(&tpacpi_pdriver);
4336 if (ret) {
4337 printk(IBM_ERR "unable to register platform driver\n");
4338 thinkpad_acpi_module_exit();
4339 return ret;
4340 }
4341 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4342 if (ret) {
4343 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4344 thinkpad_acpi_module_exit();
4345 return ret;
4346 }
4347
4348
4349 /* Device initialization */
4350 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4351 NULL, 0);
4352 if (IS_ERR(tpacpi_pdev)) {
4353 ret = PTR_ERR(tpacpi_pdev);
4354 tpacpi_pdev = NULL;
4355 printk(IBM_ERR "unable to register platform device\n");
4356 thinkpad_acpi_module_exit();
4357 return ret;
4358 }
4359 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4360 if (IS_ERR(tpacpi_hwmon)) {
4361 ret = PTR_ERR(tpacpi_hwmon);
4362 tpacpi_hwmon = NULL;
4363 printk(IBM_ERR "unable to register hwmon device\n");
4364 thinkpad_acpi_module_exit();
4365 return ret;
4366 }
4367 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4368 ret = ibm_init(&ibms_init[i]);
4369 if (ret >= 0 && *ibms_init[i].param)
4370 ret = ibms_init[i].data->write(ibms_init[i].param);
4371 if (ret < 0) {
4372 thinkpad_acpi_module_exit();
4373 return ret;
4374 }
4375 }
4376
4377 return 0;
4378 }
4379
4380 static void thinkpad_acpi_module_exit(void)
4381 {
4382 struct ibm_struct *ibm, *itmp;
4383
4384 list_for_each_entry_safe_reverse(ibm, itmp,
4385 &tpacpi_all_drivers,
4386 all_drivers) {
4387 ibm_exit(ibm);
4388 }
4389
4390 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4391
4392 if (tpacpi_hwmon)
4393 hwmon_device_unregister(tpacpi_hwmon);
4394
4395 if (tpacpi_pdev)
4396 platform_device_unregister(tpacpi_pdev);
4397
4398 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4399 platform_driver_unregister(&tpacpi_pdriver);
4400
4401 if (proc_dir)
4402 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4403
4404 kfree(ibm_thinkpad_ec_found);
4405 }
4406
4407 module_init(thinkpad_acpi_module_init);
4408 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree