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r-o-bind-mounts-elevate-write-count-for-some-ioctls-vs-forbid-user-to-change-file...
[linux-2.6/linux-trees-mm.git] / drivers / misc / thinkpad_acpi.c
blob8c943077528538ce1b77e0f44ac7c3d02eb34cbd
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 "0.17"
25 #define TPACPI_SYSFS_VERSION 0x020000
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 static enum {
121 TPACPI_LIFE_INIT = 0,
122 TPACPI_LIFE_RUNNING,
123 TPACPI_LIFE_EXITING,
124 } tpacpi_lifecycle;
125
126 /****************************************************************************
127 ****************************************************************************
128 *
129 * ACPI Helpers and device model
130 *
131 ****************************************************************************
132 ****************************************************************************/
133
134 /*************************************************************************
135 * ACPI basic handles
136 */
137
138 static acpi_handle root_handle;
139
140 #define IBM_HANDLE(object, parent, paths...) \
141 static acpi_handle object##_handle; \
142 static acpi_handle *object##_parent = &parent##_handle; \
143 static char *object##_path; \
144 static char *object##_paths[] = { paths }
145
146 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
147 "\\_SB.PCI.ISA.EC", /* 570 */
148 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
149 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
150 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
151 "\\_SB.PCI0.ICH3.EC0", /* R31 */
152 "\\_SB.PCI0.LPC.EC", /* all others */
153 );
154
155 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
156 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
157
158
159 /*************************************************************************
160 * Misc ACPI handles
161 */
162
163 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
164 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
165 "\\CMS", /* R40, R40e */
166 ); /* all others */
167
168 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
169 "^HKEY", /* R30, R31 */
170 "HKEY", /* all others */
171 ); /* 570 */
172
173
174 /*************************************************************************
175 * ACPI helpers
176 */
177
178 static int acpi_evalf(acpi_handle handle,
179 void *res, char *method, char *fmt, ...)
180 {
181 char *fmt0 = fmt;
182 struct acpi_object_list params;
183 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
184 struct acpi_buffer result, *resultp;
185 union acpi_object out_obj;
186 acpi_status status;
187 va_list ap;
188 char res_type;
189 int success;
190 int quiet;
191
192 if (!*fmt) {
193 printk(IBM_ERR "acpi_evalf() called with empty format\n");
194 return 0;
195 }
196
197 if (*fmt == 'q') {
198 quiet = 1;
199 fmt++;
200 } else
201 quiet = 0;
202
203 res_type = *(fmt++);
204
205 params.count = 0;
206 params.pointer = &in_objs[0];
207
208 va_start(ap, fmt);
209 while (*fmt) {
210 char c = *(fmt++);
211 switch (c) {
212 case 'd': /* int */
213 in_objs[params.count].integer.value = va_arg(ap, int);
214 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
215 break;
216 /* add more types as needed */
217 default:
218 printk(IBM_ERR "acpi_evalf() called "
219 "with invalid format character '%c'\n", c);
220 return 0;
221 }
222 }
223 va_end(ap);
224
225 if (res_type != 'v') {
226 result.length = sizeof(out_obj);
227 result.pointer = &out_obj;
228 resultp = &result;
229 } else
230 resultp = NULL;
231
232 status = acpi_evaluate_object(handle, method, &params, resultp);
233
234 switch (res_type) {
235 case 'd': /* int */
236 if (res)
237 *(int *)res = out_obj.integer.value;
238 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
239 break;
240 case 'v': /* void */
241 success = status == AE_OK;
242 break;
243 /* add more types as needed */
244 default:
245 printk(IBM_ERR "acpi_evalf() called "
246 "with invalid format character '%c'\n", res_type);
247 return 0;
248 }
249
250 if (!success && !quiet)
251 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
252 method, fmt0, status);
253
254 return success;
255 }
256
257 static void __unused acpi_print_int(acpi_handle handle, char *method)
258 {
259 int i;
260
261 if (acpi_evalf(handle, &i, method, "d"))
262 printk(IBM_INFO "%s = 0x%x\n", method, i);
263 else
264 printk(IBM_ERR "error calling %s\n", method);
265 }
266
267 static int acpi_ec_read(int i, u8 * p)
268 {
269 int v;
270
271 if (ecrd_handle) {
272 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
273 return 0;
274 *p = v;
275 } else {
276 if (ec_read(i, p) < 0)
277 return 0;
278 }
279
280 return 1;
281 }
282
283 static int acpi_ec_write(int i, u8 v)
284 {
285 if (ecwr_handle) {
286 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
287 return 0;
288 } else {
289 if (ec_write(i, v) < 0)
290 return 0;
291 }
292
293 return 1;
294 }
295
296 static int _sta(acpi_handle handle)
297 {
298 int status;
299
300 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
301 status = 0;
302
303 return status;
304 }
305
306 static int issue_thinkpad_cmos_command(int cmos_cmd)
307 {
308 if (!cmos_handle)
309 return -ENXIO;
310
311 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
312 return -EIO;
313
314 return 0;
315 }
316
317 /*************************************************************************
318 * ACPI device model
319 */
320
321 static void drv_acpi_handle_init(char *name,
322 acpi_handle *handle, acpi_handle parent,
323 char **paths, int num_paths, char **path)
324 {
325 int i;
326 acpi_status status;
327
328 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
329 name);
330
331 for (i = 0; i < num_paths; i++) {
332 status = acpi_get_handle(parent, paths[i], handle);
333 if (ACPI_SUCCESS(status)) {
334 *path = paths[i];
335 dbg_printk(TPACPI_DBG_INIT,
336 "Found ACPI handle %s for %s\n",
337 *path, name);
338 return;
339 }
340 }
341
342 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
343 name);
344 *handle = NULL;
345 }
346
347 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
348 {
349 struct ibm_struct *ibm = data;
350
351 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
352 return;
353
354 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
355 return;
356
357 ibm->acpi->notify(ibm, event);
358 }
359
360 static int __init setup_acpi_notify(struct ibm_struct *ibm)
361 {
362 acpi_status status;
363 int rc;
364
365 BUG_ON(!ibm->acpi);
366
367 if (!*ibm->acpi->handle)
368 return 0;
369
370 vdbg_printk(TPACPI_DBG_INIT,
371 "setting up ACPI notify for %s\n", ibm->name);
372
373 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
374 if (rc < 0) {
375 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
376 ibm->name, rc);
377 return -ENODEV;
378 }
379
380 acpi_driver_data(ibm->acpi->device) = ibm;
381 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
382 IBM_ACPI_EVENT_PREFIX,
383 ibm->name);
384
385 status = acpi_install_notify_handler(*ibm->acpi->handle,
386 ibm->acpi->type, dispatch_acpi_notify, ibm);
387 if (ACPI_FAILURE(status)) {
388 if (status == AE_ALREADY_EXISTS) {
389 printk(IBM_NOTICE "another device driver is already handling %s events\n",
390 ibm->name);
391 } else {
392 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
393 ibm->name, status);
394 }
395 return -ENODEV;
396 }
397 ibm->flags.acpi_notify_installed = 1;
398 return 0;
399 }
400
401 static int __init tpacpi_device_add(struct acpi_device *device)
402 {
403 return 0;
404 }
405
406 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
407 {
408 int rc;
409
410 dbg_printk(TPACPI_DBG_INIT,
411 "registering %s as an ACPI driver\n", ibm->name);
412
413 BUG_ON(!ibm->acpi);
414
415 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
416 if (!ibm->acpi->driver) {
417 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
418 return -ENOMEM;
419 }
420
421 sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
422 ibm->acpi->driver->ids = ibm->acpi->hid;
423
424 ibm->acpi->driver->ops.add = &tpacpi_device_add;
425
426 rc = acpi_bus_register_driver(ibm->acpi->driver);
427 if (rc < 0) {
428 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
429 ibm->name, rc);
430 kfree(ibm->acpi->driver);
431 ibm->acpi->driver = NULL;
432 } else if (!rc)
433 ibm->flags.acpi_driver_registered = 1;
434
435 return rc;
436 }
437
438
439 /****************************************************************************
440 ****************************************************************************
441 *
442 * Procfs Helpers
443 *
444 ****************************************************************************
445 ****************************************************************************/
446
447 static int dispatch_procfs_read(char *page, char **start, off_t off,
448 int count, int *eof, void *data)
449 {
450 struct ibm_struct *ibm = data;
451 int len;
452
453 if (!ibm || !ibm->read)
454 return -EINVAL;
455
456 len = ibm->read(page);
457 if (len < 0)
458 return len;
459
460 if (len <= off + count)
461 *eof = 1;
462 *start = page + off;
463 len -= off;
464 if (len > count)
465 len = count;
466 if (len < 0)
467 len = 0;
468
469 return len;
470 }
471
472 static int dispatch_procfs_write(struct file *file,
473 const char __user * userbuf,
474 unsigned long count, void *data)
475 {
476 struct ibm_struct *ibm = data;
477 char *kernbuf;
478 int ret;
479
480 if (!ibm || !ibm->write)
481 return -EINVAL;
482
483 kernbuf = kmalloc(count + 2, GFP_KERNEL);
484 if (!kernbuf)
485 return -ENOMEM;
486
487 if (copy_from_user(kernbuf, userbuf, count)) {
488 kfree(kernbuf);
489 return -EFAULT;
490 }
491
492 kernbuf[count] = 0;
493 strcat(kernbuf, ",");
494 ret = ibm->write(kernbuf);
495 if (ret == 0)
496 ret = count;
497
498 kfree(kernbuf);
499
500 return ret;
501 }
502
503 static char *next_cmd(char **cmds)
504 {
505 char *start = *cmds;
506 char *end;
507
508 while ((end = strchr(start, ',')) && end == start)
509 start = end + 1;
510
511 if (!end)
512 return NULL;
513
514 *end = 0;
515 *cmds = end + 1;
516 return start;
517 }
518
519
520 /****************************************************************************
521 ****************************************************************************
522 *
523 * Device model: input, hwmon and platform
524 *
525 ****************************************************************************
526 ****************************************************************************/
527
528 static struct platform_device *tpacpi_pdev;
529 static struct platform_device *tpacpi_sensors_pdev;
530 static struct device *tpacpi_hwmon;
531 static struct input_dev *tpacpi_inputdev;
532 static struct mutex tpacpi_inputdev_send_mutex;
533
534
535 static int tpacpi_resume_handler(struct platform_device *pdev)
536 {
537 struct ibm_struct *ibm, *itmp;
538
539 list_for_each_entry_safe(ibm, itmp,
540 &tpacpi_all_drivers,
541 all_drivers) {
542 if (ibm->resume)
543 (ibm->resume)();
544 }
545
546 return 0;
547 }
548
549 static struct platform_driver tpacpi_pdriver = {
550 .driver = {
551 .name = IBM_DRVR_NAME,
552 .owner = THIS_MODULE,
553 },
554 .resume = tpacpi_resume_handler,
555 };
556
557 static struct platform_driver tpacpi_hwmon_pdriver = {
558 .driver = {
559 .name = IBM_HWMON_DRVR_NAME,
560 .owner = THIS_MODULE,
561 },
562 };
563
564 /*************************************************************************
565 * thinkpad-acpi driver attributes
566 */
567
568 /* interface_version --------------------------------------------------- */
569 static ssize_t tpacpi_driver_interface_version_show(
570 struct device_driver *drv,
571 char *buf)
572 {
573 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
574 }
575
576 static DRIVER_ATTR(interface_version, S_IRUGO,
577 tpacpi_driver_interface_version_show, NULL);
578
579 /* debug_level --------------------------------------------------------- */
580 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
581 char *buf)
582 {
583 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
584 }
585
586 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
587 const char *buf, size_t count)
588 {
589 unsigned long t;
590
591 if (parse_strtoul(buf, 0xffff, &t))
592 return -EINVAL;
593
594 dbg_level = t;
595
596 return count;
597 }
598
599 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
600 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
601
602 /* version ------------------------------------------------------------- */
603 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
604 char *buf)
605 {
606 return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
607 }
608
609 static DRIVER_ATTR(version, S_IRUGO,
610 tpacpi_driver_version_show, NULL);
611
612 /* --------------------------------------------------------------------- */
613
614 static struct driver_attribute* tpacpi_driver_attributes[] = {
615 &driver_attr_debug_level, &driver_attr_version,
616 &driver_attr_interface_version,
617 };
618
619 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
620 {
621 int i, res;
622
623 i = 0;
624 res = 0;
625 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
626 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
627 i++;
628 }
629
630 return res;
631 }
632
633 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
634 {
635 int i;
636
637 for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
638 driver_remove_file(drv, tpacpi_driver_attributes[i]);
639 }
640
641 /*************************************************************************
642 * sysfs support helpers
643 */
644
645 struct attribute_set_obj {
646 struct attribute_set s;
647 struct attribute *a;
648 } __attribute__((packed));
649
650 static struct attribute_set *create_attr_set(unsigned int max_members,
651 const char* name)
652 {
653 struct attribute_set_obj *sobj;
654
655 if (max_members == 0)
656 return NULL;
657
658 /* Allocates space for implicit NULL at the end too */
659 sobj = kzalloc(sizeof(struct attribute_set_obj) +
660 max_members * sizeof(struct attribute *),
661 GFP_KERNEL);
662 if (!sobj)
663 return NULL;
664 sobj->s.max_members = max_members;
665 sobj->s.group.attrs = &sobj->a;
666 sobj->s.group.name = name;
667
668 return &sobj->s;
669 }
670
671 /* not multi-threaded safe, use it in a single thread per set */
672 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
673 {
674 if (!s || !attr)
675 return -EINVAL;
676
677 if (s->members >= s->max_members)
678 return -ENOMEM;
679
680 s->group.attrs[s->members] = attr;
681 s->members++;
682
683 return 0;
684 }
685
686 static int add_many_to_attr_set(struct attribute_set* s,
687 struct attribute **attr,
688 unsigned int count)
689 {
690 int i, res;
691
692 for (i = 0; i < count; i++) {
693 res = add_to_attr_set(s, attr[i]);
694 if (res)
695 return res;
696 }
697
698 return 0;
699 }
700
701 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
702 {
703 sysfs_remove_group(kobj, &s->group);
704 destroy_attr_set(s);
705 }
706
707 static int parse_strtoul(const char *buf,
708 unsigned long max, unsigned long *value)
709 {
710 char *endp;
711
712 while (*buf && isspace(*buf))
713 buf++;
714 *value = simple_strtoul(buf, &endp, 0);
715 while (*endp && isspace(*endp))
716 endp++;
717 if (*endp || *value > max)
718 return -EINVAL;
719
720 return 0;
721 }
722
723 /****************************************************************************
724 ****************************************************************************
725 *
726 * Subdrivers
727 *
728 ****************************************************************************
729 ****************************************************************************/
730
731 /*************************************************************************
732 * thinkpad-acpi init subdriver
733 */
734
735 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
736 {
737 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
738 printk(IBM_INFO "%s\n", IBM_URL);
739
740 printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
741 (thinkpad_id.bios_version_str) ?
742 thinkpad_id.bios_version_str : "unknown",
743 (thinkpad_id.ec_version_str) ?
744 thinkpad_id.ec_version_str : "unknown");
745
746 if (thinkpad_id.vendor && thinkpad_id.model_str)
747 printk(IBM_INFO "%s %s\n",
748 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
749 "IBM" : ((thinkpad_id.vendor ==
750 PCI_VENDOR_ID_LENOVO) ?
751 "Lenovo" : "Unknown vendor"),
752 thinkpad_id.model_str);
753
754 return 0;
755 }
756
757 static int thinkpad_acpi_driver_read(char *p)
758 {
759 int len = 0;
760
761 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
762 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
763
764 return len;
765 }
766
767 static struct ibm_struct thinkpad_acpi_driver_data = {
768 .name = "driver",
769 .read = thinkpad_acpi_driver_read,
770 };
771
772 /*************************************************************************
773 * Hotkey subdriver
774 */
775
776 static int hotkey_orig_status;
777 static u32 hotkey_orig_mask;
778 static u32 hotkey_all_mask;
779 static u32 hotkey_reserved_mask;
780
781 static u16 *hotkey_keycode_map;
782
783 static struct attribute_set *hotkey_dev_attributes;
784
785 static int hotkey_get_wlsw(int *status)
786 {
787 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
788 return -EIO;
789 return 0;
790 }
791
792 /* sysfs hotkey enable ------------------------------------------------- */
793 static ssize_t hotkey_enable_show(struct device *dev,
794 struct device_attribute *attr,
795 char *buf)
796 {
797 int res, status;
798 u32 mask;
799
800 res = hotkey_get(&status, &mask);
801 if (res)
802 return res;
803
804 return snprintf(buf, PAGE_SIZE, "%d\n", status);
805 }
806
807 static ssize_t hotkey_enable_store(struct device *dev,
808 struct device_attribute *attr,
809 const char *buf, size_t count)
810 {
811 unsigned long t;
812 int res, status;
813 u32 mask;
814
815 if (parse_strtoul(buf, 1, &t))
816 return -EINVAL;
817
818 res = hotkey_get(&status, &mask);
819 if (!res)
820 res = hotkey_set(t, mask);
821
822 return (res) ? res : count;
823 }
824
825 static struct device_attribute dev_attr_hotkey_enable =
826 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
827 hotkey_enable_show, hotkey_enable_store);
828
829 /* sysfs hotkey mask --------------------------------------------------- */
830 static ssize_t hotkey_mask_show(struct device *dev,
831 struct device_attribute *attr,
832 char *buf)
833 {
834 int res, status;
835 u32 mask;
836
837 res = hotkey_get(&status, &mask);
838 if (res)
839 return res;
840
841 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
842 }
843
844 static ssize_t hotkey_mask_store(struct device *dev,
845 struct device_attribute *attr,
846 const char *buf, size_t count)
847 {
848 unsigned long t;
849 int res, status;
850 u32 mask;
851
852 if (parse_strtoul(buf, 0xffffffffUL, &t))
853 return -EINVAL;
854
855 res = hotkey_get(&status, &mask);
856 if (!res)
857 hotkey_set(status, t);
858
859 return (res) ? res : count;
860 }
861
862 static struct device_attribute dev_attr_hotkey_mask =
863 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
864 hotkey_mask_show, hotkey_mask_store);
865
866 /* sysfs hotkey bios_enabled ------------------------------------------- */
867 static ssize_t hotkey_bios_enabled_show(struct device *dev,
868 struct device_attribute *attr,
869 char *buf)
870 {
871 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
872 }
873
874 static struct device_attribute dev_attr_hotkey_bios_enabled =
875 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
876
877 /* sysfs hotkey bios_mask ---------------------------------------------- */
878 static ssize_t hotkey_bios_mask_show(struct device *dev,
879 struct device_attribute *attr,
880 char *buf)
881 {
882 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
883 }
884
885 static struct device_attribute dev_attr_hotkey_bios_mask =
886 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
887
888 /* sysfs hotkey all_mask ----------------------------------------------- */
889 static ssize_t hotkey_all_mask_show(struct device *dev,
890 struct device_attribute *attr,
891 char *buf)
892 {
893 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
894 }
895
896 static struct device_attribute dev_attr_hotkey_all_mask =
897 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
898
899 /* sysfs hotkey recommended_mask --------------------------------------- */
900 static ssize_t hotkey_recommended_mask_show(struct device *dev,
901 struct device_attribute *attr,
902 char *buf)
903 {
904 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
905 hotkey_all_mask & ~hotkey_reserved_mask);
906 }
907
908 static struct device_attribute dev_attr_hotkey_recommended_mask =
909 __ATTR(hotkey_recommended_mask, S_IRUGO,
910 hotkey_recommended_mask_show, NULL);
911
912 /* sysfs hotkey radio_sw ----------------------------------------------- */
913 static ssize_t hotkey_radio_sw_show(struct device *dev,
914 struct device_attribute *attr,
915 char *buf)
916 {
917 int res, s;
918 res = hotkey_get_wlsw(&s);
919 if (res < 0)
920 return res;
921
922 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
923 }
924
925 static struct device_attribute dev_attr_hotkey_radio_sw =
926 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
927
928 /* sysfs hotkey report_mode -------------------------------------------- */
929 static ssize_t hotkey_report_mode_show(struct device *dev,
930 struct device_attribute *attr,
931 char *buf)
932 {
933 return snprintf(buf, PAGE_SIZE, "%d\n",
934 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
935 }
936
937 static struct device_attribute dev_attr_hotkey_report_mode =
938 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
939
940 /* --------------------------------------------------------------------- */
941
942 static struct attribute *hotkey_attributes[] __initdata = {
943 &dev_attr_hotkey_enable.attr,
944 &dev_attr_hotkey_report_mode.attr,
945 };
946
947 static struct attribute *hotkey_mask_attributes[] __initdata = {
948 &dev_attr_hotkey_mask.attr,
949 &dev_attr_hotkey_bios_enabled.attr,
950 &dev_attr_hotkey_bios_mask.attr,
951 &dev_attr_hotkey_all_mask.attr,
952 &dev_attr_hotkey_recommended_mask.attr,
953 };
954
955 static int __init hotkey_init(struct ibm_init_struct *iibm)
956 {
957
958 static u16 ibm_keycode_map[] __initdata = {
959 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
960 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
961 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
962 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
963 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
964 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
965 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
966 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
967 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
968 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
969 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
970 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
971 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
972 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
973 KEY_RESERVED, /* 0x14: VOLUME UP */
974 KEY_RESERVED, /* 0x15: VOLUME DOWN */
975 KEY_RESERVED, /* 0x16: MUTE */
976 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
977 /* (assignments unknown, please report if found) */
978 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
979 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
980 };
981 static u16 lenovo_keycode_map[] __initdata = {
982 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
983 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
984 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
985 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
986 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
987 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
988 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
989 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
990 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
991 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
992 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
993 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
994 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
995 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
996 KEY_RESERVED, /* 0x14: VOLUME UP */
997 KEY_RESERVED, /* 0x15: VOLUME DOWN */
998 KEY_RESERVED, /* 0x16: MUTE */
999 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
1000 /* (assignments unknown, please report if found) */
1001 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1002 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1003 };
1004
1005 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
1006 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
1007 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
1008
1009 int res, i;
1010 int status;
1011 int hkeyv;
1012
1013 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1014
1015 BUG_ON(!tpacpi_inputdev);
1016
1017 IBM_ACPIHANDLE_INIT(hkey);
1018 mutex_init(&hotkey_mutex);
1019
1020 /* hotkey not supported on 570 */
1021 tp_features.hotkey = hkey_handle != NULL;
1022
1023 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1024 str_supported(tp_features.hotkey));
1025
1026 if (tp_features.hotkey) {
1027 hotkey_dev_attributes = create_attr_set(8, NULL);
1028 if (!hotkey_dev_attributes)
1029 return -ENOMEM;
1030 res = add_many_to_attr_set(hotkey_dev_attributes,
1031 hotkey_attributes,
1032 ARRAY_SIZE(hotkey_attributes));
1033 if (res)
1034 return res;
1035
1036 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1037 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
1038 for HKEY interface version 0x100 */
1039 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1040 if ((hkeyv >> 8) != 1) {
1041 printk(IBM_ERR "unknown version of the "
1042 "HKEY interface: 0x%x\n", hkeyv);
1043 printk(IBM_ERR "please report this to %s\n",
1044 IBM_MAIL);
1045 } else {
1046 /*
1047 * MHKV 0x100 in A31, R40, R40e,
1048 * T4x, X31, and later
1049 * */
1050 tp_features.hotkey_mask = 1;
1051 }
1052 }
1053
1054 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1055 str_supported(tp_features.hotkey_mask));
1056
1057 if (tp_features.hotkey_mask) {
1058 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1059 "MHKA", "qd")) {
1060 printk(IBM_ERR
1061 "missing MHKA handler, "
1062 "please report this to %s\n",
1063 IBM_MAIL);
1064 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
1065 }
1066 }
1067
1068 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
1069 if (!res && tp_features.hotkey_mask) {
1070 res = add_many_to_attr_set(hotkey_dev_attributes,
1071 hotkey_mask_attributes,
1072 ARRAY_SIZE(hotkey_mask_attributes));
1073 }
1074
1075 /* Not all thinkpads have a hardware radio switch */
1076 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1077 tp_features.hotkey_wlsw = 1;
1078 printk(IBM_INFO
1079 "radio switch found; radios are %s\n",
1080 enabled(status, 0));
1081 res = add_to_attr_set(hotkey_dev_attributes,
1082 &dev_attr_hotkey_radio_sw.attr);
1083 }
1084
1085 if (!res)
1086 res = register_attr_set_with_sysfs(
1087 hotkey_dev_attributes,
1088 &tpacpi_pdev->dev.kobj);
1089 if (res)
1090 return res;
1091
1092 /* Set up key map */
1093
1094 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1095 GFP_KERNEL);
1096 if (!hotkey_keycode_map) {
1097 printk(IBM_ERR "failed to allocate memory for key map\n");
1098 return -ENOMEM;
1099 }
1100
1101 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1102 dbg_printk(TPACPI_DBG_INIT,
1103 "using Lenovo default hot key map\n");
1104 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1105 TPACPI_HOTKEY_MAP_SIZE);
1106 } else {
1107 dbg_printk(TPACPI_DBG_INIT,
1108 "using IBM default hot key map\n");
1109 memcpy(hotkey_keycode_map, &ibm_keycode_map,
1110 TPACPI_HOTKEY_MAP_SIZE);
1111 }
1112
1113 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1114 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1115 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1116 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1117 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1118 tpacpi_inputdev->keycode = hotkey_keycode_map;
1119 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1120 if (hotkey_keycode_map[i] != KEY_RESERVED) {
1121 set_bit(hotkey_keycode_map[i],
1122 tpacpi_inputdev->keybit);
1123 } else {
1124 if (i < sizeof(hotkey_reserved_mask)*8)
1125 hotkey_reserved_mask |= 1 << i;
1126 }
1127 }
1128
1129 if (tp_features.hotkey_wlsw) {
1130 set_bit(EV_SW, tpacpi_inputdev->evbit);
1131 set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1132 }
1133
1134 dbg_printk(TPACPI_DBG_INIT,
1135 "enabling hot key handling\n");
1136 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1137 | hotkey_orig_mask);
1138 if (res)
1139 return res;
1140
1141 dbg_printk(TPACPI_DBG_INIT,
1142 "legacy hot key reporting over procfs %s\n",
1143 (hotkey_report_mode < 2) ?
1144 "enabled" : "disabled");
1145 }
1146
1147 return (tp_features.hotkey)? 0 : 1;
1148 }
1149
1150 static void hotkey_exit(void)
1151 {
1152 int res;
1153
1154 if (tp_features.hotkey) {
1155 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1156 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1157 if (res)
1158 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1159 }
1160
1161 if (hotkey_dev_attributes) {
1162 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1163 hotkey_dev_attributes = NULL;
1164 }
1165 }
1166
1167 static void tpacpi_input_send_key(unsigned int scancode,
1168 unsigned int keycode)
1169 {
1170 if (keycode != KEY_RESERVED) {
1171 mutex_lock(&tpacpi_inputdev_send_mutex);
1172
1173 input_report_key(tpacpi_inputdev, keycode, 1);
1174 if (keycode == KEY_UNKNOWN)
1175 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1176 scancode);
1177 input_sync(tpacpi_inputdev);
1178
1179 input_report_key(tpacpi_inputdev, keycode, 0);
1180 if (keycode == KEY_UNKNOWN)
1181 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1182 scancode);
1183 input_sync(tpacpi_inputdev);
1184
1185 mutex_unlock(&tpacpi_inputdev_send_mutex);
1186 }
1187 }
1188
1189 static void tpacpi_input_send_radiosw(void)
1190 {
1191 int wlsw;
1192
1193 mutex_lock(&tpacpi_inputdev_send_mutex);
1194
1195 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1196 input_report_switch(tpacpi_inputdev,
1197 SW_RADIO, !!wlsw);
1198 input_sync(tpacpi_inputdev);
1199 }
1200
1201 mutex_unlock(&tpacpi_inputdev_send_mutex);
1202 }
1203
1204 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1205 {
1206 u32 hkey;
1207 unsigned int keycode, scancode;
1208 int send_acpi_ev;
1209 int ignore_acpi_ev;
1210
1211 if (event != 0x80) {
1212 printk(IBM_ERR "unknown HKEY notification event %d\n", event);
1213 /* forward it to userspace, maybe it knows how to handle it */
1214 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1215 ibm->acpi->device->dev.bus_id,
1216 event, 0);
1217 return;
1218 }
1219
1220 while (1) {
1221 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1222 printk(IBM_ERR "failed to retrieve HKEY event\n");
1223 return;
1224 }
1225
1226 if (hkey == 0) {
1227 /* queue empty */
1228 return;
1229 }
1230
1231 send_acpi_ev = 0;
1232 ignore_acpi_ev = 0;
1233
1234 switch (hkey >> 12) {
1235 case 1:
1236 /* 0x1000-0x1FFF: key presses */
1237 scancode = hkey & 0xfff;
1238 if (scancode > 0 && scancode < 0x21) {
1239 scancode--;
1240 keycode = hotkey_keycode_map[scancode];
1241 tpacpi_input_send_key(scancode, keycode);
1242 } else {
1243 printk(IBM_ERR
1244 "hotkey 0x%04x out of range for keyboard map\n",
1245 hkey);
1246 send_acpi_ev = 1;
1247 }
1248 break;
1249 case 5:
1250 /* 0x5000-0x5FFF: LID */
1251 /* we don't handle it through this path, just
1252 * eat up known LID events */
1253 if (hkey != 0x5001 && hkey != 0x5002) {
1254 printk(IBM_ERR
1255 "unknown LID-related HKEY event: 0x%04x\n",
1256 hkey);
1257 send_acpi_ev = 1;
1258 } else {
1259 ignore_acpi_ev = 1;
1260 }
1261 break;
1262 case 7:
1263 /* 0x7000-0x7FFF: misc */
1264 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1265 tpacpi_input_send_radiosw();
1266 break;
1267 }
1268 /* fallthrough to default */
1269 default:
1270 /* case 2: dock-related */
1271 /* 0x2305 - T43 waking up due to bay lever eject while aslept */
1272 /* case 3: ultra-bay related. maybe bay in dock? */
1273 /* 0x3003 - T43 after wake up by bay lever eject (0x2305) */
1274 printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
1275 send_acpi_ev = 1;
1276 }
1277
1278 /* Legacy events */
1279 if (!ignore_acpi_ev && (send_acpi_ev || hotkey_report_mode < 2)) {
1280 acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
1281 }
1282
1283 /* netlink events */
1284 if (!ignore_acpi_ev && send_acpi_ev) {
1285 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1286 ibm->acpi->device->dev.bus_id,
1287 event, hkey);
1288 }
1289 }
1290 }
1291
1292 static void hotkey_resume(void)
1293 {
1294 tpacpi_input_send_radiosw();
1295 }
1296
1297 /*
1298 * Call with hotkey_mutex held
1299 */
1300 static int hotkey_get(int *status, u32 *mask)
1301 {
1302 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1303 return -EIO;
1304
1305 if (tp_features.hotkey_mask)
1306 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1307 return -EIO;
1308
1309 return 0;
1310 }
1311
1312 /*
1313 * Call with hotkey_mutex held
1314 */
1315 static int hotkey_set(int status, u32 mask)
1316 {
1317 int i;
1318
1319 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1320 return -EIO;
1321
1322 if (tp_features.hotkey_mask)
1323 for (i = 0; i < 32; i++) {
1324 int bit = ((1 << i) & mask) != 0;
1325 if (!acpi_evalf(hkey_handle,
1326 NULL, "MHKM", "vdd", i + 1, bit))
1327 return -EIO;
1328 }
1329
1330 return 0;
1331 }
1332
1333 /* procfs -------------------------------------------------------------- */
1334 static int hotkey_read(char *p)
1335 {
1336 int res, status;
1337 u32 mask;
1338 int len = 0;
1339
1340 if (!tp_features.hotkey) {
1341 len += sprintf(p + len, "status:\t\tnot supported\n");
1342 return len;
1343 }
1344
1345 if (mutex_lock_interruptible(&hotkey_mutex))
1346 return -ERESTARTSYS;
1347 res = hotkey_get(&status, &mask);
1348 mutex_unlock(&hotkey_mutex);
1349 if (res)
1350 return res;
1351
1352 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1353 if (tp_features.hotkey_mask) {
1354 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1355 len += sprintf(p + len,
1356 "commands:\tenable, disable, reset, <mask>\n");
1357 } else {
1358 len += sprintf(p + len, "mask:\t\tnot supported\n");
1359 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1360 }
1361
1362 return len;
1363 }
1364
1365 static int hotkey_write(char *buf)
1366 {
1367 int res, status;
1368 u32 mask;
1369 char *cmd;
1370 int do_cmd = 0;
1371
1372 if (!tp_features.hotkey)
1373 return -ENODEV;
1374
1375 if (mutex_lock_interruptible(&hotkey_mutex))
1376 return -ERESTARTSYS;
1377
1378 res = hotkey_get(&status, &mask);
1379 if (res)
1380 goto errexit;
1381
1382 res = 0;
1383 while ((cmd = next_cmd(&buf))) {
1384 if (strlencmp(cmd, "enable") == 0) {
1385 status = 1;
1386 } else if (strlencmp(cmd, "disable") == 0) {
1387 status = 0;
1388 } else if (strlencmp(cmd, "reset") == 0) {
1389 status = hotkey_orig_status;
1390 mask = hotkey_orig_mask;
1391 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1392 /* mask set */
1393 } else if (sscanf(cmd, "%x", &mask) == 1) {
1394 /* mask set */
1395 } else {
1396 res = -EINVAL;
1397 goto errexit;
1398 }
1399 do_cmd = 1;
1400 }
1401
1402 if (do_cmd)
1403 res = hotkey_set(status, mask);
1404
1405 errexit:
1406 mutex_unlock(&hotkey_mutex);
1407 return res;
1408 }
1409
1410 static const struct acpi_device_id ibm_htk_device_ids[] = {
1411 {IBM_HKEY_HID, 0},
1412 {"", 0},
1413 };
1414
1415 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1416 .hid = ibm_htk_device_ids,
1417 .notify = hotkey_notify,
1418 .handle = &hkey_handle,
1419 .type = ACPI_DEVICE_NOTIFY,
1420 };
1421
1422 static struct ibm_struct hotkey_driver_data = {
1423 .name = "hotkey",
1424 .read = hotkey_read,
1425 .write = hotkey_write,
1426 .exit = hotkey_exit,
1427 .resume = hotkey_resume,
1428 .acpi = &ibm_hotkey_acpidriver,
1429 };
1430
1431 /*************************************************************************
1432 * Bluetooth subdriver
1433 */
1434
1435 /* sysfs bluetooth enable ---------------------------------------------- */
1436 static ssize_t bluetooth_enable_show(struct device *dev,
1437 struct device_attribute *attr,
1438 char *buf)
1439 {
1440 int status;
1441
1442 status = bluetooth_get_radiosw();
1443 if (status < 0)
1444 return status;
1445
1446 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1447 }
1448
1449 static ssize_t bluetooth_enable_store(struct device *dev,
1450 struct device_attribute *attr,
1451 const char *buf, size_t count)
1452 {
1453 unsigned long t;
1454 int res;
1455
1456 if (parse_strtoul(buf, 1, &t))
1457 return -EINVAL;
1458
1459 res = bluetooth_set_radiosw(t);
1460
1461 return (res) ? res : count;
1462 }
1463
1464 static struct device_attribute dev_attr_bluetooth_enable =
1465 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1466 bluetooth_enable_show, bluetooth_enable_store);
1467
1468 /* --------------------------------------------------------------------- */
1469
1470 static struct attribute *bluetooth_attributes[] = {
1471 &dev_attr_bluetooth_enable.attr,
1472 NULL
1473 };
1474
1475 static const struct attribute_group bluetooth_attr_group = {
1476 .attrs = bluetooth_attributes,
1477 };
1478
1479 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1480 {
1481 int res;
1482 int status = 0;
1483
1484 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1485
1486 IBM_ACPIHANDLE_INIT(hkey);
1487
1488 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1489 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1490 tp_features.bluetooth = hkey_handle &&
1491 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1492
1493 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1494 str_supported(tp_features.bluetooth),
1495 status);
1496
1497 if (tp_features.bluetooth) {
1498 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1499 /* no bluetooth hardware present in system */
1500 tp_features.bluetooth = 0;
1501 dbg_printk(TPACPI_DBG_INIT,
1502 "bluetooth hardware not installed\n");
1503 } else {
1504 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1505 &bluetooth_attr_group);
1506 if (res)
1507 return res;
1508 }
1509 }
1510
1511 return (tp_features.bluetooth)? 0 : 1;
1512 }
1513
1514 static void bluetooth_exit(void)
1515 {
1516 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1517 &bluetooth_attr_group);
1518 }
1519
1520 static int bluetooth_get_radiosw(void)
1521 {
1522 int status;
1523
1524 if (!tp_features.bluetooth)
1525 return -ENODEV;
1526
1527 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1528 return -EIO;
1529
1530 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1531 }
1532
1533 static int bluetooth_set_radiosw(int radio_on)
1534 {
1535 int status;
1536
1537 if (!tp_features.bluetooth)
1538 return -ENODEV;
1539
1540 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1541 return -EIO;
1542 if (radio_on)
1543 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1544 else
1545 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1546 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1547 return -EIO;
1548
1549 return 0;
1550 }
1551
1552 /* procfs -------------------------------------------------------------- */
1553 static int bluetooth_read(char *p)
1554 {
1555 int len = 0;
1556 int status = bluetooth_get_radiosw();
1557
1558 if (!tp_features.bluetooth)
1559 len += sprintf(p + len, "status:\t\tnot supported\n");
1560 else {
1561 len += sprintf(p + len, "status:\t\t%s\n",
1562 (status)? "enabled" : "disabled");
1563 len += sprintf(p + len, "commands:\tenable, disable\n");
1564 }
1565
1566 return len;
1567 }
1568
1569 static int bluetooth_write(char *buf)
1570 {
1571 char *cmd;
1572
1573 if (!tp_features.bluetooth)
1574 return -ENODEV;
1575
1576 while ((cmd = next_cmd(&buf))) {
1577 if (strlencmp(cmd, "enable") == 0) {
1578 bluetooth_set_radiosw(1);
1579 } else if (strlencmp(cmd, "disable") == 0) {
1580 bluetooth_set_radiosw(0);
1581 } else
1582 return -EINVAL;
1583 }
1584
1585 return 0;
1586 }
1587
1588 static struct ibm_struct bluetooth_driver_data = {
1589 .name = "bluetooth",
1590 .read = bluetooth_read,
1591 .write = bluetooth_write,
1592 .exit = bluetooth_exit,
1593 };
1594
1595 /*************************************************************************
1596 * Wan subdriver
1597 */
1598
1599 /* sysfs wan enable ---------------------------------------------------- */
1600 static ssize_t wan_enable_show(struct device *dev,
1601 struct device_attribute *attr,
1602 char *buf)
1603 {
1604 int status;
1605
1606 status = wan_get_radiosw();
1607 if (status < 0)
1608 return status;
1609
1610 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1611 }
1612
1613 static ssize_t wan_enable_store(struct device *dev,
1614 struct device_attribute *attr,
1615 const char *buf, size_t count)
1616 {
1617 unsigned long t;
1618 int res;
1619
1620 if (parse_strtoul(buf, 1, &t))
1621 return -EINVAL;
1622
1623 res = wan_set_radiosw(t);
1624
1625 return (res) ? res : count;
1626 }
1627
1628 static struct device_attribute dev_attr_wan_enable =
1629 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1630 wan_enable_show, wan_enable_store);
1631
1632 /* --------------------------------------------------------------------- */
1633
1634 static struct attribute *wan_attributes[] = {
1635 &dev_attr_wan_enable.attr,
1636 NULL
1637 };
1638
1639 static const struct attribute_group wan_attr_group = {
1640 .attrs = wan_attributes,
1641 };
1642
1643 static int __init wan_init(struct ibm_init_struct *iibm)
1644 {
1645 int res;
1646 int status = 0;
1647
1648 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1649
1650 IBM_ACPIHANDLE_INIT(hkey);
1651
1652 tp_features.wan = hkey_handle &&
1653 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1654
1655 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1656 str_supported(tp_features.wan),
1657 status);
1658
1659 if (tp_features.wan) {
1660 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1661 /* no wan hardware present in system */
1662 tp_features.wan = 0;
1663 dbg_printk(TPACPI_DBG_INIT,
1664 "wan hardware not installed\n");
1665 } else {
1666 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1667 &wan_attr_group);
1668 if (res)
1669 return res;
1670 }
1671 }
1672
1673 return (tp_features.wan)? 0 : 1;
1674 }
1675
1676 static void wan_exit(void)
1677 {
1678 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1679 &wan_attr_group);
1680 }
1681
1682 static int wan_get_radiosw(void)
1683 {
1684 int status;
1685
1686 if (!tp_features.wan)
1687 return -ENODEV;
1688
1689 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1690 return -EIO;
1691
1692 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1693 }
1694
1695 static int wan_set_radiosw(int radio_on)
1696 {
1697 int status;
1698
1699 if (!tp_features.wan)
1700 return -ENODEV;
1701
1702 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1703 return -EIO;
1704 if (radio_on)
1705 status |= TP_ACPI_WANCARD_RADIOSSW;
1706 else
1707 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1708 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1709 return -EIO;
1710
1711 return 0;
1712 }
1713
1714 /* procfs -------------------------------------------------------------- */
1715 static int wan_read(char *p)
1716 {
1717 int len = 0;
1718 int status = wan_get_radiosw();
1719
1720 if (!tp_features.wan)
1721 len += sprintf(p + len, "status:\t\tnot supported\n");
1722 else {
1723 len += sprintf(p + len, "status:\t\t%s\n",
1724 (status)? "enabled" : "disabled");
1725 len += sprintf(p + len, "commands:\tenable, disable\n");
1726 }
1727
1728 return len;
1729 }
1730
1731 static int wan_write(char *buf)
1732 {
1733 char *cmd;
1734
1735 if (!tp_features.wan)
1736 return -ENODEV;
1737
1738 while ((cmd = next_cmd(&buf))) {
1739 if (strlencmp(cmd, "enable") == 0) {
1740 wan_set_radiosw(1);
1741 } else if (strlencmp(cmd, "disable") == 0) {
1742 wan_set_radiosw(0);
1743 } else
1744 return -EINVAL;
1745 }
1746
1747 return 0;
1748 }
1749
1750 static struct ibm_struct wan_driver_data = {
1751 .name = "wan",
1752 .read = wan_read,
1753 .write = wan_write,
1754 .exit = wan_exit,
1755 .flags.experimental = 1,
1756 };
1757
1758 /*************************************************************************
1759 * Video subdriver
1760 */
1761
1762 static enum video_access_mode video_supported;
1763 static int video_orig_autosw;
1764
1765 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1766 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1767 "\\_SB.PCI0.VID0", /* 770e */
1768 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1769 "\\_SB.PCI0.AGP.VID", /* all others */
1770 ); /* R30, R31 */
1771
1772 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1773
1774 static int __init video_init(struct ibm_init_struct *iibm)
1775 {
1776 int ivga;
1777
1778 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1779
1780 IBM_ACPIHANDLE_INIT(vid);
1781 IBM_ACPIHANDLE_INIT(vid2);
1782
1783 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1784 /* G41, assume IVGA doesn't change */
1785 vid_handle = vid2_handle;
1786
1787 if (!vid_handle)
1788 /* video switching not supported on R30, R31 */
1789 video_supported = TPACPI_VIDEO_NONE;
1790 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1791 /* 570 */
1792 video_supported = TPACPI_VIDEO_570;
1793 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1794 /* 600e/x, 770e, 770x */
1795 video_supported = TPACPI_VIDEO_770;
1796 else
1797 /* all others */
1798 video_supported = TPACPI_VIDEO_NEW;
1799
1800 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1801 str_supported(video_supported != TPACPI_VIDEO_NONE),
1802 video_supported);
1803
1804 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1805 }
1806
1807 static void video_exit(void)
1808 {
1809 dbg_printk(TPACPI_DBG_EXIT,
1810 "restoring original video autoswitch mode\n");
1811 if (video_autosw_set(video_orig_autosw))
1812 printk(IBM_ERR "error while trying to restore original "
1813 "video autoswitch mode\n");
1814 }
1815
1816 static int video_outputsw_get(void)
1817 {
1818 int status = 0;
1819 int i;
1820
1821 switch (video_supported) {
1822 case TPACPI_VIDEO_570:
1823 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1824 TP_ACPI_VIDEO_570_PHSCMD))
1825 return -EIO;
1826 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1827 break;
1828 case TPACPI_VIDEO_770:
1829 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1830 return -EIO;
1831 if (i)
1832 status |= TP_ACPI_VIDEO_S_LCD;
1833 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1834 return -EIO;
1835 if (i)
1836 status |= TP_ACPI_VIDEO_S_CRT;
1837 break;
1838 case TPACPI_VIDEO_NEW:
1839 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1840 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1841 return -EIO;
1842 if (i)
1843 status |= TP_ACPI_VIDEO_S_CRT;
1844
1845 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1846 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1847 return -EIO;
1848 if (i)
1849 status |= TP_ACPI_VIDEO_S_LCD;
1850 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1851 return -EIO;
1852 if (i)
1853 status |= TP_ACPI_VIDEO_S_DVI;
1854 break;
1855 default:
1856 return -ENOSYS;
1857 }
1858
1859 return status;
1860 }
1861
1862 static int video_outputsw_set(int status)
1863 {
1864 int autosw;
1865 int res = 0;
1866
1867 switch (video_supported) {
1868 case TPACPI_VIDEO_570:
1869 res = acpi_evalf(NULL, NULL,
1870 "\\_SB.PHS2", "vdd",
1871 TP_ACPI_VIDEO_570_PHS2CMD,
1872 status | TP_ACPI_VIDEO_570_PHS2SET);
1873 break;
1874 case TPACPI_VIDEO_770:
1875 autosw = video_autosw_get();
1876 if (autosw < 0)
1877 return autosw;
1878
1879 res = video_autosw_set(1);
1880 if (res)
1881 return res;
1882 res = acpi_evalf(vid_handle, NULL,
1883 "ASWT", "vdd", status * 0x100, 0);
1884 if (!autosw && video_autosw_set(autosw)) {
1885 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1886 return -EIO;
1887 }
1888 break;
1889 case TPACPI_VIDEO_NEW:
1890 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1891 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1892 break;
1893 default:
1894 return -ENOSYS;
1895 }
1896
1897 return (res)? 0 : -EIO;
1898 }
1899
1900 static int video_autosw_get(void)
1901 {
1902 int autosw = 0;
1903
1904 switch (video_supported) {
1905 case TPACPI_VIDEO_570:
1906 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1907 return -EIO;
1908 break;
1909 case TPACPI_VIDEO_770:
1910 case TPACPI_VIDEO_NEW:
1911 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1912 return -EIO;
1913 break;
1914 default:
1915 return -ENOSYS;
1916 }
1917
1918 return autosw & 1;
1919 }
1920
1921 static int video_autosw_set(int enable)
1922 {
1923 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1924 return -EIO;
1925 return 0;
1926 }
1927
1928 static int video_outputsw_cycle(void)
1929 {
1930 int autosw = video_autosw_get();
1931 int res;
1932
1933 if (autosw < 0)
1934 return autosw;
1935
1936 switch (video_supported) {
1937 case TPACPI_VIDEO_570:
1938 res = video_autosw_set(1);
1939 if (res)
1940 return res;
1941 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1942 break;
1943 case TPACPI_VIDEO_770:
1944 case TPACPI_VIDEO_NEW:
1945 res = video_autosw_set(1);
1946 if (res)
1947 return res;
1948 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1949 break;
1950 default:
1951 return -ENOSYS;
1952 }
1953 if (!autosw && video_autosw_set(autosw)) {
1954 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1955 return -EIO;
1956 }
1957
1958 return (res)? 0 : -EIO;
1959 }
1960
1961 static int video_expand_toggle(void)
1962 {
1963 switch (video_supported) {
1964 case TPACPI_VIDEO_570:
1965 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1966 0 : -EIO;
1967 case TPACPI_VIDEO_770:
1968 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1969 0 : -EIO;
1970 case TPACPI_VIDEO_NEW:
1971 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1972 0 : -EIO;
1973 default:
1974 return -ENOSYS;
1975 }
1976 /* not reached */
1977 }
1978
1979 static int video_read(char *p)
1980 {
1981 int status, autosw;
1982 int len = 0;
1983
1984 if (video_supported == TPACPI_VIDEO_NONE) {
1985 len += sprintf(p + len, "status:\t\tnot supported\n");
1986 return len;
1987 }
1988
1989 status = video_outputsw_get();
1990 if (status < 0)
1991 return status;
1992
1993 autosw = video_autosw_get();
1994 if (autosw < 0)
1995 return autosw;
1996
1997 len += sprintf(p + len, "status:\t\tsupported\n");
1998 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1999 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
2000 if (video_supported == TPACPI_VIDEO_NEW)
2001 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
2002 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
2003 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
2004 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
2005 if (video_supported == TPACPI_VIDEO_NEW)
2006 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
2007 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
2008 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
2009
2010 return len;
2011 }
2012
2013 static int video_write(char *buf)
2014 {
2015 char *cmd;
2016 int enable, disable, status;
2017 int res;
2018
2019 if (video_supported == TPACPI_VIDEO_NONE)
2020 return -ENODEV;
2021
2022 enable = 0;
2023 disable = 0;
2024
2025 while ((cmd = next_cmd(&buf))) {
2026 if (strlencmp(cmd, "lcd_enable") == 0) {
2027 enable |= TP_ACPI_VIDEO_S_LCD;
2028 } else if (strlencmp(cmd, "lcd_disable") == 0) {
2029 disable |= TP_ACPI_VIDEO_S_LCD;
2030 } else if (strlencmp(cmd, "crt_enable") == 0) {
2031 enable |= TP_ACPI_VIDEO_S_CRT;
2032 } else if (strlencmp(cmd, "crt_disable") == 0) {
2033 disable |= TP_ACPI_VIDEO_S_CRT;
2034 } else if (video_supported == TPACPI_VIDEO_NEW &&
2035 strlencmp(cmd, "dvi_enable") == 0) {
2036 enable |= TP_ACPI_VIDEO_S_DVI;
2037 } else if (video_supported == TPACPI_VIDEO_NEW &&
2038 strlencmp(cmd, "dvi_disable") == 0) {
2039 disable |= TP_ACPI_VIDEO_S_DVI;
2040 } else if (strlencmp(cmd, "auto_enable") == 0) {
2041 res = video_autosw_set(1);
2042 if (res)
2043 return res;
2044 } else if (strlencmp(cmd, "auto_disable") == 0) {
2045 res = video_autosw_set(0);
2046 if (res)
2047 return res;
2048 } else if (strlencmp(cmd, "video_switch") == 0) {
2049 res = video_outputsw_cycle();
2050 if (res)
2051 return res;
2052 } else if (strlencmp(cmd, "expand_toggle") == 0) {
2053 res = video_expand_toggle();
2054 if (res)
2055 return res;
2056 } else
2057 return -EINVAL;
2058 }
2059
2060 if (enable || disable) {
2061 status = video_outputsw_get();
2062 if (status < 0)
2063 return status;
2064 res = video_outputsw_set((status & ~disable) | enable);
2065 if (res)
2066 return res;
2067 }
2068
2069 return 0;
2070 }
2071
2072 static struct ibm_struct video_driver_data = {
2073 .name = "video",
2074 .read = video_read,
2075 .write = video_write,
2076 .exit = video_exit,
2077 };
2078
2079 /*************************************************************************
2080 * Light (thinklight) subdriver
2081 */
2082
2083 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
2084 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
2085
2086 static int __init light_init(struct ibm_init_struct *iibm)
2087 {
2088 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
2089
2090 IBM_ACPIHANDLE_INIT(ledb);
2091 IBM_ACPIHANDLE_INIT(lght);
2092 IBM_ACPIHANDLE_INIT(cmos);
2093
2094 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
2095 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
2096
2097 if (tp_features.light)
2098 /* light status not supported on
2099 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
2100 tp_features.light_status =
2101 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
2102
2103 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
2104 str_supported(tp_features.light));
2105
2106 return (tp_features.light)? 0 : 1;
2107 }
2108
2109 static int light_read(char *p)
2110 {
2111 int len = 0;
2112 int status = 0;
2113
2114 if (!tp_features.light) {
2115 len += sprintf(p + len, "status:\t\tnot supported\n");
2116 } else if (!tp_features.light_status) {
2117 len += sprintf(p + len, "status:\t\tunknown\n");
2118 len += sprintf(p + len, "commands:\ton, off\n");
2119 } else {
2120 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
2121 return -EIO;
2122 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
2123 len += sprintf(p + len, "commands:\ton, off\n");
2124 }
2125
2126 return len;
2127 }
2128
2129 static int light_write(char *buf)
2130 {
2131 int cmos_cmd, lght_cmd;
2132 char *cmd;
2133 int success;
2134
2135 if (!tp_features.light)
2136 return -ENODEV;
2137
2138 while ((cmd = next_cmd(&buf))) {
2139 if (strlencmp(cmd, "on") == 0) {
2140 cmos_cmd = 0x0c;
2141 lght_cmd = 1;
2142 } else if (strlencmp(cmd, "off") == 0) {
2143 cmos_cmd = 0x0d;
2144 lght_cmd = 0;
2145 } else
2146 return -EINVAL;
2147
2148 success = cmos_handle ?
2149 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2150 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2151 if (!success)
2152 return -EIO;
2153 }
2154
2155 return 0;
2156 }
2157
2158 static struct ibm_struct light_driver_data = {
2159 .name = "light",
2160 .read = light_read,
2161 .write = light_write,
2162 };
2163
2164 /*************************************************************************
2165 * Dock subdriver
2166 */
2167
2168 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2169
2170 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
2171 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2172 "\\_SB.PCI0.PCI1.DOCK", /* all others */
2173 "\\_SB.PCI.ISA.SLCE", /* 570 */
2174 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2175
2176 /* don't list other alternatives as we install a notify handler on the 570 */
2177 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
2178
2179 static const struct acpi_device_id ibm_pci_device_ids[] = {
2180 {PCI_ROOT_HID_STRING, 0},
2181 {"", 0},
2182 };
2183
2184 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2185 {
2186 .notify = dock_notify,
2187 .handle = &dock_handle,
2188 .type = ACPI_SYSTEM_NOTIFY,
2189 },
2190 {
2191 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2192 * We just use it to get notifications of dock hotplug
2193 * in very old thinkpads */
2194 .hid = ibm_pci_device_ids,
2195 .notify = dock_notify,
2196 .handle = &pci_handle,
2197 .type = ACPI_SYSTEM_NOTIFY,
2198 },
2199 };
2200
2201 static struct ibm_struct dock_driver_data[2] = {
2202 {
2203 .name = "dock",
2204 .read = dock_read,
2205 .write = dock_write,
2206 .acpi = &ibm_dock_acpidriver[0],
2207 },
2208 {
2209 .name = "dock",
2210 .acpi = &ibm_dock_acpidriver[1],
2211 },
2212 };
2213
2214 #define dock_docked() (_sta(dock_handle) & 1)
2215
2216 static int __init dock_init(struct ibm_init_struct *iibm)
2217 {
2218 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2219
2220 IBM_ACPIHANDLE_INIT(dock);
2221
2222 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2223 str_supported(dock_handle != NULL));
2224
2225 return (dock_handle)? 0 : 1;
2226 }
2227
2228 static int __init dock_init2(struct ibm_init_struct *iibm)
2229 {
2230 int dock2_needed;
2231
2232 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2233
2234 if (dock_driver_data[0].flags.acpi_driver_registered &&
2235 dock_driver_data[0].flags.acpi_notify_installed) {
2236 IBM_ACPIHANDLE_INIT(pci);
2237 dock2_needed = (pci_handle != NULL);
2238 vdbg_printk(TPACPI_DBG_INIT,
2239 "dock PCI handler for the TP 570 is %s\n",
2240 str_supported(dock2_needed));
2241 } else {
2242 vdbg_printk(TPACPI_DBG_INIT,
2243 "dock subdriver part 2 not required\n");
2244 dock2_needed = 0;
2245 }
2246
2247 return (dock2_needed)? 0 : 1;
2248 }
2249
2250 static void dock_notify(struct ibm_struct *ibm, u32 event)
2251 {
2252 int docked = dock_docked();
2253 int pci = ibm->acpi->hid && ibm->acpi->device &&
2254 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
2255 int data;
2256
2257 if (event == 1 && !pci) /* 570 */
2258 data = 1; /* button */
2259 else if (event == 1 && pci) /* 570 */
2260 data = 3; /* dock */
2261 else if (event == 3 && docked)
2262 data = 1; /* button */
2263 else if (event == 3 && !docked)
2264 data = 2; /* undock */
2265 else if (event == 0 && docked)
2266 data = 3; /* dock */
2267 else {
2268 printk(IBM_ERR "unknown dock event %d, status %d\n",
2269 event, _sta(dock_handle));
2270 data = 0; /* unknown */
2271 }
2272 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
2273 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2274 ibm->acpi->device->dev.bus_id,
2275 event, data);
2276 }
2277
2278 static int dock_read(char *p)
2279 {
2280 int len = 0;
2281 int docked = dock_docked();
2282
2283 if (!dock_handle)
2284 len += sprintf(p + len, "status:\t\tnot supported\n");
2285 else if (!docked)
2286 len += sprintf(p + len, "status:\t\tundocked\n");
2287 else {
2288 len += sprintf(p + len, "status:\t\tdocked\n");
2289 len += sprintf(p + len, "commands:\tdock, undock\n");
2290 }
2291
2292 return len;
2293 }
2294
2295 static int dock_write(char *buf)
2296 {
2297 char *cmd;
2298
2299 if (!dock_docked())
2300 return -ENODEV;
2301
2302 while ((cmd = next_cmd(&buf))) {
2303 if (strlencmp(cmd, "undock") == 0) {
2304 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2305 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2306 return -EIO;
2307 } else if (strlencmp(cmd, "dock") == 0) {
2308 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2309 return -EIO;
2310 } else
2311 return -EINVAL;
2312 }
2313
2314 return 0;
2315 }
2316
2317 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2318
2319 /*************************************************************************
2320 * Bay subdriver
2321 */
2322
2323 #ifdef CONFIG_THINKPAD_ACPI_BAY
2324 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
2325 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2326 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2327 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2328 ); /* A21e, R30, R31 */
2329 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2330 "_EJ0", /* all others */
2331 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2332 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
2333 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2334 ); /* all others */
2335 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
2336 "_EJ0", /* 770x */
2337 ); /* all others */
2338
2339 static int __init bay_init(struct ibm_init_struct *iibm)
2340 {
2341 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2342
2343 IBM_ACPIHANDLE_INIT(bay);
2344 if (bay_handle)
2345 IBM_ACPIHANDLE_INIT(bay_ej);
2346 IBM_ACPIHANDLE_INIT(bay2);
2347 if (bay2_handle)
2348 IBM_ACPIHANDLE_INIT(bay2_ej);
2349
2350 tp_features.bay_status = bay_handle &&
2351 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2352 tp_features.bay_status2 = bay2_handle &&
2353 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2354
2355 tp_features.bay_eject = bay_handle && bay_ej_handle &&
2356 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2357 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2358 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2359
2360 vdbg_printk(TPACPI_DBG_INIT,
2361 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2362 str_supported(tp_features.bay_status),
2363 str_supported(tp_features.bay_eject),
2364 str_supported(tp_features.bay_status2),
2365 str_supported(tp_features.bay_eject2));
2366
2367 return (tp_features.bay_status || tp_features.bay_eject ||
2368 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2369 }
2370
2371 static void bay_notify(struct ibm_struct *ibm, u32 event)
2372 {
2373 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
2374 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2375 ibm->acpi->device->dev.bus_id,
2376 event, 0);
2377 }
2378
2379 #define bay_occupied(b) (_sta(b##_handle) & 1)
2380
2381 static int bay_read(char *p)
2382 {
2383 int len = 0;
2384 int occupied = bay_occupied(bay);
2385 int occupied2 = bay_occupied(bay2);
2386 int eject, eject2;
2387
2388 len += sprintf(p + len, "status:\t\t%s\n",
2389 tp_features.bay_status ?
2390 (occupied ? "occupied" : "unoccupied") :
2391 "not supported");
2392 if (tp_features.bay_status2)
2393 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2394 "occupied" : "unoccupied");
2395
2396 eject = tp_features.bay_eject && occupied;
2397 eject2 = tp_features.bay_eject2 && occupied2;
2398
2399 if (eject && eject2)
2400 len += sprintf(p + len, "commands:\teject, eject2\n");
2401 else if (eject)
2402 len += sprintf(p + len, "commands:\teject\n");
2403 else if (eject2)
2404 len += sprintf(p + len, "commands:\teject2\n");
2405
2406 return len;
2407 }
2408
2409 static int bay_write(char *buf)
2410 {
2411 char *cmd;
2412
2413 if (!tp_features.bay_eject && !tp_features.bay_eject2)
2414 return -ENODEV;
2415
2416 while ((cmd = next_cmd(&buf))) {
2417 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2418 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2419 return -EIO;
2420 } else if (tp_features.bay_eject2 &&
2421 strlencmp(cmd, "eject2") == 0) {
2422 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2423 return -EIO;
2424 } else
2425 return -EINVAL;
2426 }
2427
2428 return 0;
2429 }
2430
2431 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2432 .notify = bay_notify,
2433 .handle = &bay_handle,
2434 .type = ACPI_SYSTEM_NOTIFY,
2435 };
2436
2437 static struct ibm_struct bay_driver_data = {
2438 .name = "bay",
2439 .read = bay_read,
2440 .write = bay_write,
2441 .acpi = &ibm_bay_acpidriver,
2442 };
2443
2444 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2445
2446 /*************************************************************************
2447 * CMOS subdriver
2448 */
2449
2450 /* sysfs cmos_command -------------------------------------------------- */
2451 static ssize_t cmos_command_store(struct device *dev,
2452 struct device_attribute *attr,
2453 const char *buf, size_t count)
2454 {
2455 unsigned long cmos_cmd;
2456 int res;
2457
2458 if (parse_strtoul(buf, 21, &cmos_cmd))
2459 return -EINVAL;
2460
2461 res = issue_thinkpad_cmos_command(cmos_cmd);
2462 return (res)? res : count;
2463 }
2464
2465 static struct device_attribute dev_attr_cmos_command =
2466 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2467
2468 /* --------------------------------------------------------------------- */
2469
2470 static int __init cmos_init(struct ibm_init_struct *iibm)
2471 {
2472 int res;
2473
2474 vdbg_printk(TPACPI_DBG_INIT,
2475 "initializing cmos commands subdriver\n");
2476
2477 IBM_ACPIHANDLE_INIT(cmos);
2478
2479 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2480 str_supported(cmos_handle != NULL));
2481
2482 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2483 if (res)
2484 return res;
2485
2486 return (cmos_handle)? 0 : 1;
2487 }
2488
2489 static void cmos_exit(void)
2490 {
2491 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2492 }
2493
2494 static int cmos_read(char *p)
2495 {
2496 int len = 0;
2497
2498 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2499 R30, R31, T20-22, X20-21 */
2500 if (!cmos_handle)
2501 len += sprintf(p + len, "status:\t\tnot supported\n");
2502 else {
2503 len += sprintf(p + len, "status:\t\tsupported\n");
2504 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2505 }
2506
2507 return len;
2508 }
2509
2510 static int cmos_write(char *buf)
2511 {
2512 char *cmd;
2513 int cmos_cmd, res;
2514
2515 while ((cmd = next_cmd(&buf))) {
2516 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2517 cmos_cmd >= 0 && cmos_cmd <= 21) {
2518 /* cmos_cmd set */
2519 } else
2520 return -EINVAL;
2521
2522 res = issue_thinkpad_cmos_command(cmos_cmd);
2523 if (res)
2524 return res;
2525 }
2526
2527 return 0;
2528 }
2529
2530 static struct ibm_struct cmos_driver_data = {
2531 .name = "cmos",
2532 .read = cmos_read,
2533 .write = cmos_write,
2534 .exit = cmos_exit,
2535 };
2536
2537 /*************************************************************************
2538 * LED subdriver
2539 */
2540
2541 static enum led_access_mode led_supported;
2542
2543 IBM_HANDLE(led, ec, "SLED", /* 570 */
2544 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2545 "LED", /* all others */
2546 ); /* R30, R31 */
2547
2548 static int __init led_init(struct ibm_init_struct *iibm)
2549 {
2550 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2551
2552 IBM_ACPIHANDLE_INIT(led);
2553
2554 if (!led_handle)
2555 /* led not supported on R30, R31 */
2556 led_supported = TPACPI_LED_NONE;
2557 else if (strlencmp(led_path, "SLED") == 0)
2558 /* 570 */
2559 led_supported = TPACPI_LED_570;
2560 else if (strlencmp(led_path, "SYSL") == 0)
2561 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2562 led_supported = TPACPI_LED_OLD;
2563 else
2564 /* all others */
2565 led_supported = TPACPI_LED_NEW;
2566
2567 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2568 str_supported(led_supported), led_supported);
2569
2570 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2571 }
2572
2573 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2574
2575 static int led_read(char *p)
2576 {
2577 int len = 0;
2578
2579 if (!led_supported) {
2580 len += sprintf(p + len, "status:\t\tnot supported\n");
2581 return len;
2582 }
2583 len += sprintf(p + len, "status:\t\tsupported\n");
2584
2585 if (led_supported == TPACPI_LED_570) {
2586 /* 570 */
2587 int i, status;
2588 for (i = 0; i < 8; i++) {
2589 if (!acpi_evalf(ec_handle,
2590 &status, "GLED", "dd", 1 << i))
2591 return -EIO;
2592 len += sprintf(p + len, "%d:\t\t%s\n",
2593 i, led_status(status));
2594 }
2595 }
2596
2597 len += sprintf(p + len, "commands:\t"
2598 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2599
2600 return len;
2601 }
2602
2603 /* off, on, blink */
2604 static const int led_sled_arg1[] = { 0, 1, 3 };
2605 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
2606 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
2607 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2608
2609 static int led_write(char *buf)
2610 {
2611 char *cmd;
2612 int led, ind, ret;
2613
2614 if (!led_supported)
2615 return -ENODEV;
2616
2617 while ((cmd = next_cmd(&buf))) {
2618 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2619 return -EINVAL;
2620
2621 if (strstr(cmd, "off")) {
2622 ind = 0;
2623 } else if (strstr(cmd, "on")) {
2624 ind = 1;
2625 } else if (strstr(cmd, "blink")) {
2626 ind = 2;
2627 } else
2628 return -EINVAL;
2629
2630 if (led_supported == TPACPI_LED_570) {
2631 /* 570 */
2632 led = 1 << led;
2633 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2634 led, led_sled_arg1[ind]))
2635 return -EIO;
2636 } else if (led_supported == TPACPI_LED_OLD) {
2637 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2638 led = 1 << led;
2639 ret = ec_write(TPACPI_LED_EC_HLMS, led);
2640 if (ret >= 0)
2641 ret =
2642 ec_write(TPACPI_LED_EC_HLBL,
2643 led * led_exp_hlbl[ind]);
2644 if (ret >= 0)
2645 ret =
2646 ec_write(TPACPI_LED_EC_HLCL,
2647 led * led_exp_hlcl[ind]);
2648 if (ret < 0)
2649 return ret;
2650 } else {
2651 /* all others */
2652 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2653 led, led_led_arg1[ind]))
2654 return -EIO;
2655 }
2656 }
2657
2658 return 0;
2659 }
2660
2661 static struct ibm_struct led_driver_data = {
2662 .name = "led",
2663 .read = led_read,
2664 .write = led_write,
2665 };
2666
2667 /*************************************************************************
2668 * Beep subdriver
2669 */
2670
2671 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
2672
2673 static int __init beep_init(struct ibm_init_struct *iibm)
2674 {
2675 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2676
2677 IBM_ACPIHANDLE_INIT(beep);
2678
2679 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2680 str_supported(beep_handle != NULL));
2681
2682 return (beep_handle)? 0 : 1;
2683 }
2684
2685 static int beep_read(char *p)
2686 {
2687 int len = 0;
2688
2689 if (!beep_handle)
2690 len += sprintf(p + len, "status:\t\tnot supported\n");
2691 else {
2692 len += sprintf(p + len, "status:\t\tsupported\n");
2693 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2694 }
2695
2696 return len;
2697 }
2698
2699 static int beep_write(char *buf)
2700 {
2701 char *cmd;
2702 int beep_cmd;
2703
2704 if (!beep_handle)
2705 return -ENODEV;
2706
2707 while ((cmd = next_cmd(&buf))) {
2708 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2709 beep_cmd >= 0 && beep_cmd <= 17) {
2710 /* beep_cmd set */
2711 } else
2712 return -EINVAL;
2713 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2714 return -EIO;
2715 }
2716
2717 return 0;
2718 }
2719
2720 static struct ibm_struct beep_driver_data = {
2721 .name = "beep",
2722 .read = beep_read,
2723 .write = beep_write,
2724 };
2725
2726 /*************************************************************************
2727 * Thermal subdriver
2728 */
2729
2730 static enum thermal_access_mode thermal_read_mode;
2731
2732 /* sysfs temp##_input -------------------------------------------------- */
2733
2734 static ssize_t thermal_temp_input_show(struct device *dev,
2735 struct device_attribute *attr,
2736 char *buf)
2737 {
2738 struct sensor_device_attribute *sensor_attr =
2739 to_sensor_dev_attr(attr);
2740 int idx = sensor_attr->index;
2741 s32 value;
2742 int res;
2743
2744 res = thermal_get_sensor(idx, &value);
2745 if (res)
2746 return res;
2747 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2748 return -ENXIO;
2749
2750 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2751 }
2752
2753 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2754 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2755
2756 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2757 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2758 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2759 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2760 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2761 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2762 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2763 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2764 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2765 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2766 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2767 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2768 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2769 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2770 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2771 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2772 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2773 };
2774
2775 #define THERMAL_ATTRS(X) \
2776 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2777
2778 static struct attribute *thermal_temp_input_attr[] = {
2779 THERMAL_ATTRS(8),
2780 THERMAL_ATTRS(9),
2781 THERMAL_ATTRS(10),
2782 THERMAL_ATTRS(11),
2783 THERMAL_ATTRS(12),
2784 THERMAL_ATTRS(13),
2785 THERMAL_ATTRS(14),
2786 THERMAL_ATTRS(15),
2787 THERMAL_ATTRS(0),
2788 THERMAL_ATTRS(1),
2789 THERMAL_ATTRS(2),
2790 THERMAL_ATTRS(3),
2791 THERMAL_ATTRS(4),
2792 THERMAL_ATTRS(5),
2793 THERMAL_ATTRS(6),
2794 THERMAL_ATTRS(7),
2795 NULL
2796 };
2797
2798 static const struct attribute_group thermal_temp_input16_group = {
2799 .attrs = thermal_temp_input_attr
2800 };
2801
2802 static const struct attribute_group thermal_temp_input8_group = {
2803 .attrs = &thermal_temp_input_attr[8]
2804 };
2805
2806 #undef THERMAL_SENSOR_ATTR_TEMP
2807 #undef THERMAL_ATTRS
2808
2809 /* --------------------------------------------------------------------- */
2810
2811 static int __init thermal_init(struct ibm_init_struct *iibm)
2812 {
2813 u8 t, ta1, ta2;
2814 int i;
2815 int acpi_tmp7;
2816 int res;
2817
2818 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2819
2820 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2821
2822 if (thinkpad_id.ec_model) {
2823 /*
2824 * Direct EC access mode: sensors at registers
2825 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2826 * non-implemented, thermal sensors return 0x80 when
2827 * not available
2828 */
2829
2830 ta1 = ta2 = 0;
2831 for (i = 0; i < 8; i++) {
2832 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2833 ta1 |= t;
2834 } else {
2835 ta1 = 0;
2836 break;
2837 }
2838 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2839 ta2 |= t;
2840 } else {
2841 ta1 = 0;
2842 break;
2843 }
2844 }
2845 if (ta1 == 0) {
2846 /* This is sheer paranoia, but we handle it anyway */
2847 if (acpi_tmp7) {
2848 printk(IBM_ERR
2849 "ThinkPad ACPI EC access misbehaving, "
2850 "falling back to ACPI TMPx access mode\n");
2851 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2852 } else {
2853 printk(IBM_ERR
2854 "ThinkPad ACPI EC access misbehaving, "
2855 "disabling thermal sensors access\n");
2856 thermal_read_mode = TPACPI_THERMAL_NONE;
2857 }
2858 } else {
2859 thermal_read_mode =
2860 (ta2 != 0) ?
2861 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2862 }
2863 } else if (acpi_tmp7) {
2864 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2865 /* 600e/x, 770e, 770x */
2866 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2867 } else {
2868 /* Standard ACPI TMPx access, max 8 sensors */
2869 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2870 }
2871 } else {
2872 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2873 thermal_read_mode = TPACPI_THERMAL_NONE;
2874 }
2875
2876 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2877 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2878 thermal_read_mode);
2879
2880 switch(thermal_read_mode) {
2881 case TPACPI_THERMAL_TPEC_16:
2882 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
2883 &thermal_temp_input16_group);
2884 if (res)
2885 return res;
2886 break;
2887 case TPACPI_THERMAL_TPEC_8:
2888 case TPACPI_THERMAL_ACPI_TMP07:
2889 case TPACPI_THERMAL_ACPI_UPDT:
2890 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
2891 &thermal_temp_input8_group);
2892 if (res)
2893 return res;
2894 break;
2895 case TPACPI_THERMAL_NONE:
2896 default:
2897 return 1;
2898 }
2899
2900 return 0;
2901 }
2902
2903 static void thermal_exit(void)
2904 {
2905 switch(thermal_read_mode) {
2906 case TPACPI_THERMAL_TPEC_16:
2907 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
2908 &thermal_temp_input16_group);
2909 break;
2910 case TPACPI_THERMAL_TPEC_8:
2911 case TPACPI_THERMAL_ACPI_TMP07:
2912 case TPACPI_THERMAL_ACPI_UPDT:
2913 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
2914 &thermal_temp_input16_group);
2915 break;
2916 case TPACPI_THERMAL_NONE:
2917 default:
2918 break;
2919 }
2920 }
2921
2922 /* idx is zero-based */
2923 static int thermal_get_sensor(int idx, s32 *value)
2924 {
2925 int t;
2926 s8 tmp;
2927 char tmpi[5];
2928
2929 t = TP_EC_THERMAL_TMP0;
2930
2931 switch (thermal_read_mode) {
2932 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2933 case TPACPI_THERMAL_TPEC_16:
2934 if (idx >= 8 && idx <= 15) {
2935 t = TP_EC_THERMAL_TMP8;
2936 idx -= 8;
2937 }
2938 /* fallthrough */
2939 #endif
2940 case TPACPI_THERMAL_TPEC_8:
2941 if (idx <= 7) {
2942 if (!acpi_ec_read(t + idx, &tmp))
2943 return -EIO;
2944 *value = tmp * 1000;
2945 return 0;
2946 }
2947 break;
2948
2949 case TPACPI_THERMAL_ACPI_UPDT:
2950 if (idx <= 7) {
2951 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2952 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2953 return -EIO;
2954 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2955 return -EIO;
2956 *value = (t - 2732) * 100;
2957 return 0;
2958 }
2959 break;
2960
2961 case TPACPI_THERMAL_ACPI_TMP07:
2962 if (idx <= 7) {
2963 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2964 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2965 return -EIO;
2966 if (t > 127 || t < -127)
2967 t = TP_EC_THERMAL_TMP_NA;
2968 *value = t * 1000;
2969 return 0;
2970 }
2971 break;
2972
2973 case TPACPI_THERMAL_NONE:
2974 default:
2975 return -ENOSYS;
2976 }
2977
2978 return -EINVAL;
2979 }
2980
2981 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2982 {
2983 int res, i;
2984 int n;
2985
2986 n = 8;
2987 i = 0;
2988
2989 if (!s)
2990 return -EINVAL;
2991
2992 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2993 n = 16;
2994
2995 for(i = 0 ; i < n; i++) {
2996 res = thermal_get_sensor(i, &s->temp[i]);
2997 if (res)
2998 return res;
2999 }
3000
3001 return n;
3002 }
3003
3004 static int thermal_read(char *p)
3005 {
3006 int len = 0;
3007 int n, i;
3008 struct ibm_thermal_sensors_struct t;
3009
3010 n = thermal_get_sensors(&t);
3011 if (unlikely(n < 0))
3012 return n;
3013
3014 len += sprintf(p + len, "temperatures:\t");
3015
3016 if (n > 0) {
3017 for (i = 0; i < (n - 1); i++)
3018 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
3019 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
3020 } else
3021 len += sprintf(p + len, "not supported\n");
3022
3023 return len;
3024 }
3025
3026 static struct ibm_struct thermal_driver_data = {
3027 .name = "thermal",
3028 .read = thermal_read,
3029 .exit = thermal_exit,
3030 };
3031
3032 /*************************************************************************
3033 * EC Dump subdriver
3034 */
3035
3036 static u8 ecdump_regs[256];
3037
3038 static int ecdump_read(char *p)
3039 {
3040 int len = 0;
3041 int i, j;
3042 u8 v;
3043
3044 len += sprintf(p + len, "EC "
3045 " +00 +01 +02 +03 +04 +05 +06 +07"
3046 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
3047 for (i = 0; i < 256; i += 16) {
3048 len += sprintf(p + len, "EC 0x%02x:", i);
3049 for (j = 0; j < 16; j++) {
3050 if (!acpi_ec_read(i + j, &v))
3051 break;
3052 if (v != ecdump_regs[i + j])
3053 len += sprintf(p + len, " *%02x", v);
3054 else
3055 len += sprintf(p + len, " %02x", v);
3056 ecdump_regs[i + j] = v;
3057 }
3058 len += sprintf(p + len, "\n");
3059 if (j != 16)
3060 break;
3061 }
3062
3063 /* These are way too dangerous to advertise openly... */
3064 #if 0
3065 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
3066 " (<offset> is 00-ff, <value> is 00-ff)\n");
3067 len += sprintf(p + len, "commands:\t0x<offset> <value> "
3068 " (<offset> is 00-ff, <value> is 0-255)\n");
3069 #endif
3070 return len;
3071 }
3072
3073 static int ecdump_write(char *buf)
3074 {
3075 char *cmd;
3076 int i, v;
3077
3078 while ((cmd = next_cmd(&buf))) {
3079 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
3080 /* i and v set */
3081 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
3082 /* i and v set */
3083 } else
3084 return -EINVAL;
3085 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
3086 if (!acpi_ec_write(i, v))
3087 return -EIO;
3088 } else
3089 return -EINVAL;
3090 }
3091
3092 return 0;
3093 }
3094
3095 static struct ibm_struct ecdump_driver_data = {
3096 .name = "ecdump",
3097 .read = ecdump_read,
3098 .write = ecdump_write,
3099 .flags.experimental = 1,
3100 };
3101
3102 /*************************************************************************
3103 * Backlight/brightness subdriver
3104 */
3105
3106 static struct backlight_device *ibm_backlight_device;
3107
3108 static struct backlight_ops ibm_backlight_data = {
3109 .get_brightness = brightness_get,
3110 .update_status = brightness_update_status,
3111 };
3112
3113 static struct mutex brightness_mutex;
3114
3115 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
3116 {
3117 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
3118 union acpi_object *obj;
3119 int rc;
3120
3121 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
3122 obj = (union acpi_object *)buffer.pointer;
3123 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
3124 printk(IBM_ERR "Unknown BCLL data, "
3125 "please report this to %s\n", IBM_MAIL);
3126 rc = 0;
3127 } else {
3128 rc = obj->package.count;
3129 }
3130 } else {
3131 return 0;
3132 }
3133
3134 kfree(buffer.pointer);
3135 return rc;
3136 }
3137
3138 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
3139 void *context, void **rv)
3140 {
3141 char name[ACPI_PATH_SEGMENT_LENGTH];
3142 struct acpi_buffer buffer = { sizeof(name), &name };
3143
3144 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
3145 !strncmp("BCLL", name, sizeof(name) - 1)) {
3146 if (tpacpi_query_bcll_levels(handle) == 16) {
3147 *rv = handle;
3148 return AE_CTRL_TERMINATE;
3149 } else {
3150 return AE_OK;
3151 }
3152 } else {
3153 return AE_OK;
3154 }
3155 }
3156
3157 static int __init brightness_check_levels(void)
3158 {
3159 int status;
3160 void *found_node = NULL;
3161
3162 if (!vid_handle) {
3163 IBM_ACPIHANDLE_INIT(vid);
3164 }
3165 if (!vid_handle)
3166 return 0;
3167
3168 /* Search for a BCLL package with 16 levels */
3169 status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
3170 brightness_find_bcll, NULL, &found_node);
3171
3172 return (ACPI_SUCCESS(status) && found_node != NULL);
3173 }
3174
3175 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
3176 void *context, void **rv)
3177 {
3178 char name[ACPI_PATH_SEGMENT_LENGTH];
3179 struct acpi_buffer buffer = { sizeof(name), &name };
3180
3181 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
3182 !strncmp("_BCL", name, sizeof(name) - 1)) {
3183 *rv = handle;
3184 return AE_CTRL_TERMINATE;
3185 } else {
3186 return AE_OK;
3187 }
3188 }
3189
3190 static int __init brightness_check_std_acpi_support(void)
3191 {
3192 int status;
3193 void *found_node = NULL;
3194
3195 if (!vid_handle) {
3196 IBM_ACPIHANDLE_INIT(vid);
3197 }
3198 if (!vid_handle)
3199 return 0;
3200
3201 /* Search for a _BCL method, but don't execute it */
3202 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
3203 brightness_find_bcl, NULL, &found_node);
3204
3205 return (ACPI_SUCCESS(status) && found_node != NULL);
3206 }
3207
3208 static int __init brightness_init(struct ibm_init_struct *iibm)
3209 {
3210 int b;
3211
3212 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3213
3214 mutex_init(&brightness_mutex);
3215
3216 if (!brightness_enable) {
3217 dbg_printk(TPACPI_DBG_INIT,
3218 "brightness support disabled by module parameter\n");
3219 return 1;
3220 } else if (brightness_enable > 1) {
3221 if (brightness_check_std_acpi_support()) {
3222 printk(IBM_NOTICE
3223 "standard ACPI backlight interface available, not loading native one...\n");
3224 return 1;
3225 }
3226 }
3227
3228 if (!brightness_mode) {
3229 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3230 brightness_mode = 2;
3231 else
3232 brightness_mode = 3;
3233
3234 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3235 brightness_mode);
3236 }
3237
3238 if (brightness_mode > 3)
3239 return -EINVAL;
3240
3241 tp_features.bright_16levels =
3242 thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
3243 brightness_check_levels();
3244
3245 b = brightness_get(NULL);
3246 if (b < 0)
3247 return 1;
3248
3249 if (tp_features.bright_16levels)
3250 printk(IBM_INFO "detected a 16-level brightness capable ThinkPad\n");
3251
3252 ibm_backlight_device = backlight_device_register(
3253 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3254 &ibm_backlight_data);
3255 if (IS_ERR(ibm_backlight_device)) {
3256 printk(IBM_ERR "Could not register backlight device\n");
3257 return PTR_ERR(ibm_backlight_device);
3258 }
3259 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3260
3261 ibm_backlight_device->props.max_brightness =
3262 (tp_features.bright_16levels)? 15 : 7;
3263 ibm_backlight_device->props.brightness = b;
3264 backlight_update_status(ibm_backlight_device);
3265
3266 return 0;
3267 }
3268
3269 static void brightness_exit(void)
3270 {
3271 if (ibm_backlight_device) {
3272 vdbg_printk(TPACPI_DBG_EXIT,
3273 "calling backlight_device_unregister()\n");
3274 backlight_device_unregister(ibm_backlight_device);
3275 ibm_backlight_device = NULL;
3276 }
3277 }
3278
3279 static int brightness_update_status(struct backlight_device *bd)
3280 {
3281 /* it is the backlight class's job (caller) to handle
3282 * EINTR and other errors properly */
3283 return brightness_set(
3284 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3285 bd->props.power == FB_BLANK_UNBLANK) ?
3286 bd->props.brightness : 0);
3287 }
3288
3289 /*
3290 * ThinkPads can read brightness from two places: EC 0x31, or
3291 * CMOS NVRAM byte 0x5E, bits 0-3.
3292 */
3293 static int brightness_get(struct backlight_device *bd)
3294 {
3295 u8 lec = 0, lcmos = 0, level = 0;
3296
3297 if (brightness_mode & 1) {
3298 if (!acpi_ec_read(brightness_offset, &lec))
3299 return -EIO;
3300 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
3301 level = lec;
3302 };
3303 if (brightness_mode & 2) {
3304 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3305 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3306 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3307 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
3308 level = lcmos;
3309 }
3310
3311 if (brightness_mode == 3 && lec != lcmos) {
3312 printk(IBM_ERR
3313 "CMOS NVRAM (%u) and EC (%u) do not agree "
3314 "on display brightness level\n",
3315 (unsigned int) lcmos,
3316 (unsigned int) lec);
3317 return -EIO;
3318 }
3319
3320 return level;
3321 }
3322
3323 /* May return EINTR which can always be mapped to ERESTARTSYS */
3324 static int brightness_set(int value)
3325 {
3326 int cmos_cmd, inc, i, res;
3327 int current_value;
3328
3329 if (value > ((tp_features.bright_16levels)? 15 : 7))
3330 return -EINVAL;
3331
3332 res = mutex_lock_interruptible(&brightness_mutex);
3333 if (res < 0)
3334 return res;
3335
3336 current_value = brightness_get(NULL);
3337 if (current_value < 0) {
3338 res = current_value;
3339 goto errout;
3340 }
3341
3342 cmos_cmd = value > current_value ?
3343 TP_CMOS_BRIGHTNESS_UP :
3344 TP_CMOS_BRIGHTNESS_DOWN;
3345 inc = (value > current_value)? 1 : -1;
3346
3347 res = 0;
3348 for (i = current_value; i != value; i += inc) {
3349 if ((brightness_mode & 2) &&
3350 issue_thinkpad_cmos_command(cmos_cmd)) {
3351 res = -EIO;
3352 goto errout;
3353 }
3354 if ((brightness_mode & 1) &&
3355 !acpi_ec_write(brightness_offset, i + inc)) {
3356 res = -EIO;
3357 goto errout;;
3358 }
3359 }
3360
3361 errout:
3362 mutex_unlock(&brightness_mutex);
3363 return res;
3364 }
3365
3366 static int brightness_read(char *p)
3367 {
3368 int len = 0;
3369 int level;
3370
3371 if ((level = brightness_get(NULL)) < 0) {
3372 len += sprintf(p + len, "level:\t\tunreadable\n");
3373 } else {
3374 len += sprintf(p + len, "level:\t\t%d\n", level);
3375 len += sprintf(p + len, "commands:\tup, down\n");
3376 len += sprintf(p + len, "commands:\tlevel <level>"
3377 " (<level> is 0-%d)\n",
3378 (tp_features.bright_16levels) ? 15 : 7);
3379 }
3380
3381 return len;
3382 }
3383
3384 static int brightness_write(char *buf)
3385 {
3386 int level;
3387 int rc;
3388 char *cmd;
3389 int max_level = (tp_features.bright_16levels) ? 15 : 7;
3390
3391 level = brightness_get(NULL);
3392 if (level < 0)
3393 return level;
3394
3395 while ((cmd = next_cmd(&buf))) {
3396 if (strlencmp(cmd, "up") == 0) {
3397 if (level < max_level)
3398 level++;
3399 } else if (strlencmp(cmd, "down") == 0) {
3400 if (level > 0)
3401 level--;
3402 } else if (sscanf(cmd, "level %d", &level) == 1 &&
3403 level >= 0 && level <= max_level) {
3404 /* new level set */
3405 } else
3406 return -EINVAL;
3407 }
3408
3409 /*
3410 * Now we know what the final level should be, so we try to set it.
3411 * Doing it this way makes the syscall restartable in case of EINTR
3412 */
3413 rc = brightness_set(level);
3414 return (rc == -EINTR)? ERESTARTSYS : rc;
3415 }
3416
3417 static struct ibm_struct brightness_driver_data = {
3418 .name = "brightness",
3419 .read = brightness_read,
3420 .write = brightness_write,
3421 .exit = brightness_exit,
3422 };
3423
3424 /*************************************************************************
3425 * Volume subdriver
3426 */
3427
3428 static int volume_read(char *p)
3429 {
3430 int len = 0;
3431 u8 level;
3432
3433 if (!acpi_ec_read(volume_offset, &level)) {
3434 len += sprintf(p + len, "level:\t\tunreadable\n");
3435 } else {
3436 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3437 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3438 len += sprintf(p + len, "commands:\tup, down, mute\n");
3439 len += sprintf(p + len, "commands:\tlevel <level>"
3440 " (<level> is 0-15)\n");
3441 }
3442
3443 return len;
3444 }
3445
3446 static int volume_write(char *buf)
3447 {
3448 int cmos_cmd, inc, i;
3449 u8 level, mute;
3450 int new_level, new_mute;
3451 char *cmd;
3452
3453 while ((cmd = next_cmd(&buf))) {
3454 if (!acpi_ec_read(volume_offset, &level))
3455 return -EIO;
3456 new_mute = mute = level & 0x40;
3457 new_level = level = level & 0xf;
3458
3459 if (strlencmp(cmd, "up") == 0) {
3460 if (mute)
3461 new_mute = 0;
3462 else
3463 new_level = level == 15 ? 15 : level + 1;
3464 } else if (strlencmp(cmd, "down") == 0) {
3465 if (mute)
3466 new_mute = 0;
3467 else
3468 new_level = level == 0 ? 0 : level - 1;
3469 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3470 new_level >= 0 && new_level <= 15) {
3471 /* new_level set */
3472 } else if (strlencmp(cmd, "mute") == 0) {
3473 new_mute = 0x40;
3474 } else
3475 return -EINVAL;
3476
3477 if (new_level != level) { /* mute doesn't change */
3478 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3479 inc = new_level > level ? 1 : -1;
3480
3481 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3482 !acpi_ec_write(volume_offset, level)))
3483 return -EIO;
3484
3485 for (i = level; i != new_level; i += inc)
3486 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3487 !acpi_ec_write(volume_offset, i + inc))
3488 return -EIO;
3489
3490 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3491 !acpi_ec_write(volume_offset,
3492 new_level + mute)))
3493 return -EIO;
3494 }
3495
3496 if (new_mute != mute) { /* level doesn't change */
3497 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3498
3499 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3500 !acpi_ec_write(volume_offset, level + new_mute))
3501 return -EIO;
3502 }
3503 }
3504
3505 return 0;
3506 }
3507
3508 static struct ibm_struct volume_driver_data = {
3509 .name = "volume",
3510 .read = volume_read,
3511 .write = volume_write,
3512 };
3513
3514 /*************************************************************************
3515 * Fan subdriver
3516 */
3517
3518 /*
3519 * FAN ACCESS MODES
3520 *
3521 * TPACPI_FAN_RD_ACPI_GFAN:
3522 * ACPI GFAN method: returns fan level
3523 *
3524 * see TPACPI_FAN_WR_ACPI_SFAN
3525 * EC 0x2f (HFSP) not available if GFAN exists
3526 *
3527 * TPACPI_FAN_WR_ACPI_SFAN:
3528 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3529 *
3530 * EC 0x2f (HFSP) might be available *for reading*, but do not use
3531 * it for writing.
3532 *
3533 * TPACPI_FAN_WR_TPEC:
3534 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
3535 * Supported on almost all ThinkPads
3536 *
3537 * Fan speed changes of any sort (including those caused by the
3538 * disengaged mode) are usually done slowly by the firmware as the
3539 * maximum ammount of fan duty cycle change per second seems to be
3540 * limited.
3541 *
3542 * Reading is not available if GFAN exists.
3543 * Writing is not available if SFAN exists.
3544 *
3545 * Bits
3546 * 7 automatic mode engaged;
3547 * (default operation mode of the ThinkPad)
3548 * fan level is ignored in this mode.
3549 * 6 full speed mode (takes precedence over bit 7);
3550 * not available on all thinkpads. May disable
3551 * the tachometer while the fan controller ramps up
3552 * the speed (which can take up to a few *minutes*).
3553 * Speeds up fan to 100% duty-cycle, which is far above
3554 * the standard RPM levels. It is not impossible that
3555 * it could cause hardware damage.
3556 * 5-3 unused in some models. Extra bits for fan level
3557 * in others, but still useless as all values above
3558 * 7 map to the same speed as level 7 in these models.
3559 * 2-0 fan level (0..7 usually)
3560 * 0x00 = stop
3561 * 0x07 = max (set when temperatures critical)
3562 * Some ThinkPads may have other levels, see
3563 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3564 *
3565 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3566 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3567 * does so, its initial value is meaningless (0x07).
3568 *
3569 * For firmware bugs, refer to:
3570 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3571 *
3572 * ----
3573 *
3574 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3575 * Main fan tachometer reading (in RPM)
3576 *
3577 * This register is present on all ThinkPads with a new-style EC, and
3578 * it is known not to be present on the A21m/e, and T22, as there is
3579 * something else in offset 0x84 according to the ACPI DSDT. Other
3580 * ThinkPads from this same time period (and earlier) probably lack the
3581 * tachometer as well.
3582 *
3583 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3584 * was never fixed by IBM to report the EC firmware version string
3585 * probably support the tachometer (like the early X models), so
3586 * detecting it is quite hard. We need more data to know for sure.
3587 *
3588 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3589 * might result.
3590 *
3591 * FIRMWARE BUG: may go stale while the EC is switching to full speed
3592 * mode.
3593 *
3594 * For firmware bugs, refer to:
3595 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3596 *
3597 * TPACPI_FAN_WR_ACPI_FANS:
3598 * ThinkPad X31, X40, X41. Not available in the X60.
3599 *
3600 * FANS ACPI handle: takes three arguments: low speed, medium speed,
3601 * high speed. ACPI DSDT seems to map these three speeds to levels
3602 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3603 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3604 *
3605 * The speeds are stored on handles
3606 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3607 *
3608 * There are three default speed sets, acessible as handles:
3609 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3610 *
3611 * ACPI DSDT switches which set is in use depending on various
3612 * factors.
3613 *
3614 * TPACPI_FAN_WR_TPEC is also available and should be used to
3615 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
3616 * but the ACPI tables just mention level 7.
3617 */
3618
3619 static enum fan_status_access_mode fan_status_access_mode;
3620 static enum fan_control_access_mode fan_control_access_mode;
3621 static enum fan_control_commands fan_control_commands;
3622
3623 static u8 fan_control_initial_status;
3624 static u8 fan_control_desired_level;
3625
3626 static void fan_watchdog_fire(struct work_struct *ignored);
3627 static int fan_watchdog_maxinterval;
3628 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3629
3630 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
3631 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
3632 "\\FSPD", /* 600e/x, 770e, 770x */
3633 ); /* all others */
3634 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
3635 "JFNS", /* 770x-JL */
3636 ); /* all others */
3637
3638 /*
3639 * SYSFS fan layout: hwmon compatible (device)
3640 *
3641 * pwm*_enable:
3642 * 0: "disengaged" mode
3643 * 1: manual mode
3644 * 2: native EC "auto" mode (recommended, hardware default)
3645 *
3646 * pwm*: set speed in manual mode, ignored otherwise.
3647 * 0 is level 0; 255 is level 7. Intermediate points done with linear
3648 * interpolation.
3649 *
3650 * fan*_input: tachometer reading, RPM
3651 *
3652 *
3653 * SYSFS fan layout: extensions
3654 *
3655 * fan_watchdog (driver):
3656 * fan watchdog interval in seconds, 0 disables (default), max 120
3657 */
3658
3659 /* sysfs fan pwm1_enable ----------------------------------------------- */
3660 static ssize_t fan_pwm1_enable_show(struct device *dev,
3661 struct device_attribute *attr,
3662 char *buf)
3663 {
3664 int res, mode;
3665 u8 status;
3666
3667 res = fan_get_status_safe(&status);
3668 if (res)
3669 return res;
3670
3671 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3672 if (status != fan_control_initial_status) {
3673 tp_features.fan_ctrl_status_undef = 0;
3674 } else {
3675 /* Return most likely status. In fact, it
3676 * might be the only possible status */
3677 status = TP_EC_FAN_AUTO;
3678 }
3679 }
3680
3681 if (status & TP_EC_FAN_FULLSPEED) {
3682 mode = 0;
3683 } else if (status & TP_EC_FAN_AUTO) {
3684 mode = 2;
3685 } else
3686 mode = 1;
3687
3688 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3689 }
3690
3691 static ssize_t fan_pwm1_enable_store(struct device *dev,
3692 struct device_attribute *attr,
3693 const char *buf, size_t count)
3694 {
3695 unsigned long t;
3696 int res, level;
3697
3698 if (parse_strtoul(buf, 2, &t))
3699 return -EINVAL;
3700
3701 switch (t) {
3702 case 0:
3703 level = TP_EC_FAN_FULLSPEED;
3704 break;
3705 case 1:
3706 level = TPACPI_FAN_LAST_LEVEL;
3707 break;
3708 case 2:
3709 level = TP_EC_FAN_AUTO;
3710 break;
3711 case 3:
3712 /* reserved for software-controlled auto mode */
3713 return -ENOSYS;
3714 default:
3715 return -EINVAL;
3716 }
3717
3718 res = fan_set_level_safe(level);
3719 if (res == -ENXIO)
3720 return -EINVAL;
3721 else if (res < 0)
3722 return res;
3723
3724 fan_watchdog_reset();
3725
3726 return count;
3727 }
3728
3729 static struct device_attribute dev_attr_fan_pwm1_enable =
3730 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3731 fan_pwm1_enable_show, fan_pwm1_enable_store);
3732
3733 /* sysfs fan pwm1 ------------------------------------------------------ */
3734 static ssize_t fan_pwm1_show(struct device *dev,
3735 struct device_attribute *attr,
3736 char *buf)
3737 {
3738 int res;
3739 u8 status;
3740
3741 res = fan_get_status_safe(&status);
3742 if (res)
3743 return res;
3744
3745 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3746 if (status != fan_control_initial_status) {
3747 tp_features.fan_ctrl_status_undef = 0;
3748 } else {
3749 status = TP_EC_FAN_AUTO;
3750 }
3751 }
3752
3753 if ((status &
3754 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3755 status = fan_control_desired_level;
3756
3757 if (status > 7)
3758 status = 7;
3759
3760 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3761 }
3762
3763 static ssize_t fan_pwm1_store(struct device *dev,
3764 struct device_attribute *attr,
3765 const char *buf, size_t count)
3766 {
3767 unsigned long s;
3768 int rc;
3769 u8 status, newlevel;
3770
3771 if (parse_strtoul(buf, 255, &s))
3772 return -EINVAL;
3773
3774 /* scale down from 0-255 to 0-7 */
3775 newlevel = (s >> 5) & 0x07;
3776
3777 if (mutex_lock_interruptible(&fan_mutex))
3778 return -ERESTARTSYS;
3779
3780 rc = fan_get_status(&status);
3781 if (!rc && (status &
3782 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3783 rc = fan_set_level(newlevel);
3784 if (rc == -ENXIO)
3785 rc = -EINVAL;
3786 else if (!rc) {
3787 fan_update_desired_level(newlevel);
3788 fan_watchdog_reset();
3789 }
3790 }
3791
3792 mutex_unlock(&fan_mutex);
3793 return (rc)? rc : count;
3794 }
3795
3796 static struct device_attribute dev_attr_fan_pwm1 =
3797 __ATTR(pwm1, S_IWUSR | S_IRUGO,
3798 fan_pwm1_show, fan_pwm1_store);
3799
3800 /* sysfs fan fan1_input ------------------------------------------------ */
3801 static ssize_t fan_fan1_input_show(struct device *dev,
3802 struct device_attribute *attr,
3803 char *buf)
3804 {
3805 int res;
3806 unsigned int speed;
3807
3808 res = fan_get_speed(&speed);
3809 if (res < 0)
3810 return res;
3811
3812 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3813 }
3814
3815 static struct device_attribute dev_attr_fan_fan1_input =
3816 __ATTR(fan1_input, S_IRUGO,
3817 fan_fan1_input_show, NULL);
3818
3819 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
3820 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3821 char *buf)
3822 {
3823 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3824 }
3825
3826 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3827 const char *buf, size_t count)
3828 {
3829 unsigned long t;
3830
3831 if (parse_strtoul(buf, 120, &t))
3832 return -EINVAL;
3833
3834 if (!fan_control_allowed)
3835 return -EPERM;
3836
3837 fan_watchdog_maxinterval = t;
3838 fan_watchdog_reset();
3839
3840 return count;
3841 }
3842
3843 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3844 fan_fan_watchdog_show, fan_fan_watchdog_store);
3845
3846 /* --------------------------------------------------------------------- */
3847 static struct attribute *fan_attributes[] = {
3848 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3849 &dev_attr_fan_fan1_input.attr,
3850 NULL
3851 };
3852
3853 static const struct attribute_group fan_attr_group = {
3854 .attrs = fan_attributes,
3855 };
3856
3857 static int __init fan_init(struct ibm_init_struct *iibm)
3858 {
3859 int rc;
3860
3861 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3862
3863 mutex_init(&fan_mutex);
3864 fan_status_access_mode = TPACPI_FAN_NONE;
3865 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3866 fan_control_commands = 0;
3867 fan_watchdog_maxinterval = 0;
3868 tp_features.fan_ctrl_status_undef = 0;
3869 fan_control_desired_level = 7;
3870
3871 IBM_ACPIHANDLE_INIT(fans);
3872 IBM_ACPIHANDLE_INIT(gfan);
3873 IBM_ACPIHANDLE_INIT(sfan);
3874
3875 if (gfan_handle) {
3876 /* 570, 600e/x, 770e, 770x */
3877 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3878 } else {
3879 /* all other ThinkPads: note that even old-style
3880 * ThinkPad ECs supports the fan control register */
3881 if (likely(acpi_ec_read(fan_status_offset,
3882 &fan_control_initial_status))) {
3883 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3884
3885 /* In some ThinkPads, neither the EC nor the ACPI
3886 * DSDT initialize the fan status, and it ends up
3887 * being set to 0x07 when it *could* be either
3888 * 0x07 or 0x80.
3889 *
3890 * Enable for TP-1Y (T43), TP-78 (R51e),
3891 * TP-76 (R52), TP-70 (T43, R52), which are known
3892 * to be buggy. */
3893 if (fan_control_initial_status == 0x07) {
3894 switch (thinkpad_id.ec_model) {
3895 case 0x5931: /* TP-1Y */
3896 case 0x3837: /* TP-78 */
3897 case 0x3637: /* TP-76 */
3898 case 0x3037: /* TP-70 */
3899 printk(IBM_NOTICE
3900 "fan_init: initial fan status is "
3901 "unknown, assuming it is in auto "
3902 "mode\n");
3903 tp_features.fan_ctrl_status_undef = 1;
3904 ;;
3905 }
3906 }
3907 } else {
3908 printk(IBM_ERR
3909 "ThinkPad ACPI EC access misbehaving, "
3910 "fan status and control unavailable\n");
3911 return 1;
3912 }
3913 }
3914
3915 if (sfan_handle) {
3916 /* 570, 770x-JL */
3917 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3918 fan_control_commands |=
3919 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3920 } else {
3921 if (!gfan_handle) {
3922 /* gfan without sfan means no fan control */
3923 /* all other models implement TP EC 0x2f control */
3924
3925 if (fans_handle) {
3926 /* X31, X40, X41 */
3927 fan_control_access_mode =
3928 TPACPI_FAN_WR_ACPI_FANS;
3929 fan_control_commands |=
3930 TPACPI_FAN_CMD_SPEED |
3931 TPACPI_FAN_CMD_LEVEL |
3932 TPACPI_FAN_CMD_ENABLE;
3933 } else {
3934 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3935 fan_control_commands |=
3936 TPACPI_FAN_CMD_LEVEL |
3937 TPACPI_FAN_CMD_ENABLE;
3938 }
3939 }
3940 }
3941
3942 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3943 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3944 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3945 fan_status_access_mode, fan_control_access_mode);
3946
3947 /* fan control master switch */
3948 if (!fan_control_allowed) {
3949 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3950 fan_control_commands = 0;
3951 dbg_printk(TPACPI_DBG_INIT,
3952 "fan control features disabled by parameter\n");
3953 }
3954
3955 /* update fan_control_desired_level */
3956 if (fan_status_access_mode != TPACPI_FAN_NONE)
3957 fan_get_status_safe(NULL);
3958
3959 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3960 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3961 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
3962 &fan_attr_group);
3963 if (!(rc < 0))
3964 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
3965 &driver_attr_fan_watchdog);
3966 if (rc < 0)
3967 return rc;
3968 return 0;
3969 } else
3970 return 1;
3971 }
3972
3973 /*
3974 * Call with fan_mutex held
3975 */
3976 static void fan_update_desired_level(u8 status)
3977 {
3978 if ((status &
3979 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3980 if (status > 7)
3981 fan_control_desired_level = 7;
3982 else
3983 fan_control_desired_level = status;
3984 }
3985 }
3986
3987 static int fan_get_status(u8 *status)
3988 {
3989 u8 s;
3990
3991 /* TODO:
3992 * Add TPACPI_FAN_RD_ACPI_FANS ? */
3993
3994 switch (fan_status_access_mode) {
3995 case TPACPI_FAN_RD_ACPI_GFAN:
3996 /* 570, 600e/x, 770e, 770x */
3997
3998 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3999 return -EIO;
4000
4001 if (likely(status))
4002 *status = s & 0x07;
4003
4004 break;
4005
4006 case TPACPI_FAN_RD_TPEC:
4007 /* all except 570, 600e/x, 770e, 770x */
4008 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4009 return -EIO;
4010
4011 if (likely(status))
4012 *status = s;
4013
4014 break;
4015
4016 default:
4017 return -ENXIO;
4018 }
4019
4020 return 0;
4021 }
4022
4023 static int fan_get_status_safe(u8 *status)
4024 {
4025 int rc;
4026 u8 s;
4027
4028 if (mutex_lock_interruptible(&fan_mutex))
4029 return -ERESTARTSYS;
4030 rc = fan_get_status(&s);
4031 if (!rc)
4032 fan_update_desired_level(s);
4033 mutex_unlock(&fan_mutex);
4034
4035 if (status)
4036 *status = s;
4037
4038 return rc;
4039 }
4040
4041 static void fan_exit(void)
4042 {
4043 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
4044
4045 /* FIXME: can we really do this unconditionally? */
4046 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
4047 driver_remove_file(&tpacpi_hwmon_pdriver.driver, &driver_attr_fan_watchdog);
4048
4049 cancel_delayed_work(&fan_watchdog_task);
4050 flush_scheduled_work();
4051 }
4052
4053 static int fan_get_speed(unsigned int *speed)
4054 {
4055 u8 hi, lo;
4056
4057 switch (fan_status_access_mode) {
4058 case TPACPI_FAN_RD_TPEC:
4059 /* all except 570, 600e/x, 770e, 770x */
4060 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4061 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4062 return -EIO;
4063
4064 if (likely(speed))
4065 *speed = (hi << 8) | lo;
4066
4067 break;
4068
4069 default:
4070 return -ENXIO;
4071 }
4072
4073 return 0;
4074 }
4075
4076 static void fan_watchdog_fire(struct work_struct *ignored)
4077 {
4078 int rc;
4079
4080 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
4081 return;
4082
4083 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
4084 rc = fan_set_enable();
4085 if (rc < 0) {
4086 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
4087 "will try again later...\n", -rc);
4088 /* reschedule for later */
4089 fan_watchdog_reset();
4090 }
4091 }
4092
4093 static void fan_watchdog_reset(void)
4094 {
4095 static int fan_watchdog_active;
4096
4097 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
4098 return;
4099
4100 if (fan_watchdog_active)
4101 cancel_delayed_work(&fan_watchdog_task);
4102
4103 if (fan_watchdog_maxinterval > 0 &&
4104 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
4105 fan_watchdog_active = 1;
4106 if (!schedule_delayed_work(&fan_watchdog_task,
4107 msecs_to_jiffies(fan_watchdog_maxinterval
4108 * 1000))) {
4109 printk(IBM_ERR "failed to schedule the fan watchdog, "
4110 "watchdog will not trigger\n");
4111 }
4112 } else
4113 fan_watchdog_active = 0;
4114 }
4115
4116 static int fan_set_level(int level)
4117 {
4118 if (!fan_control_allowed)
4119 return -EPERM;
4120
4121 switch (fan_control_access_mode) {
4122 case TPACPI_FAN_WR_ACPI_SFAN:
4123 if (level >= 0 && level <= 7) {
4124 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4125 return -EIO;
4126 } else
4127 return -EINVAL;
4128 break;
4129
4130 case TPACPI_FAN_WR_ACPI_FANS:
4131 case TPACPI_FAN_WR_TPEC:
4132 if ((level != TP_EC_FAN_AUTO) &&
4133 (level != TP_EC_FAN_FULLSPEED) &&
4134 ((level < 0) || (level > 7)))
4135 return -EINVAL;
4136
4137 /* safety net should the EC not support AUTO
4138 * or FULLSPEED mode bits and just ignore them */
4139 if (level & TP_EC_FAN_FULLSPEED)
4140 level |= 7; /* safety min speed 7 */
4141 else if (level & TP_EC_FAN_FULLSPEED)
4142 level |= 4; /* safety min speed 4 */
4143
4144 if (!acpi_ec_write(fan_status_offset, level))
4145 return -EIO;
4146 else
4147 tp_features.fan_ctrl_status_undef = 0;
4148 break;
4149
4150 default:
4151 return -ENXIO;
4152 }
4153 return 0;
4154 }
4155
4156 static int fan_set_level_safe(int level)
4157 {
4158 int rc;
4159
4160 if (!fan_control_allowed)
4161 return -EPERM;
4162
4163 if (mutex_lock_interruptible(&fan_mutex))
4164 return -ERESTARTSYS;
4165
4166 if (level == TPACPI_FAN_LAST_LEVEL)
4167 level = fan_control_desired_level;
4168
4169 rc = fan_set_level(level);
4170 if (!rc)
4171 fan_update_desired_level(level);
4172
4173 mutex_unlock(&fan_mutex);
4174 return rc;
4175 }
4176
4177 static int fan_set_enable(void)
4178 {
4179 u8 s;
4180 int rc;
4181
4182 if (!fan_control_allowed)
4183 return -EPERM;
4184
4185 if (mutex_lock_interruptible(&fan_mutex))
4186 return -ERESTARTSYS;
4187
4188 switch (fan_control_access_mode) {
4189 case TPACPI_FAN_WR_ACPI_FANS:
4190 case TPACPI_FAN_WR_TPEC:
4191 rc = fan_get_status(&s);
4192 if (rc < 0)
4193 break;
4194
4195 /* Don't go out of emergency fan mode */
4196 if (s != 7) {
4197 s &= 0x07;
4198 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4199 }
4200
4201 if (!acpi_ec_write(fan_status_offset, s))
4202 rc = -EIO;
4203 else {
4204 tp_features.fan_ctrl_status_undef = 0;
4205 rc = 0;
4206 }
4207 break;
4208
4209 case TPACPI_FAN_WR_ACPI_SFAN:
4210 rc = fan_get_status(&s);
4211 if (rc < 0)
4212 break;
4213
4214 s &= 0x07;
4215
4216 /* Set fan to at least level 4 */
4217 s |= 4;
4218
4219 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4220 rc= -EIO;
4221 else
4222 rc = 0;
4223 break;
4224
4225 default:
4226 rc = -ENXIO;
4227 }
4228
4229 mutex_unlock(&fan_mutex);
4230 return rc;
4231 }
4232
4233 static int fan_set_disable(void)
4234 {
4235 int rc;
4236
4237 if (!fan_control_allowed)
4238 return -EPERM;
4239
4240 if (mutex_lock_interruptible(&fan_mutex))
4241 return -ERESTARTSYS;
4242
4243 rc = 0;
4244 switch (fan_control_access_mode) {
4245 case TPACPI_FAN_WR_ACPI_FANS:
4246 case TPACPI_FAN_WR_TPEC:
4247 if (!acpi_ec_write(fan_status_offset, 0x00))
4248 rc = -EIO;
4249 else {
4250 fan_control_desired_level = 0;
4251 tp_features.fan_ctrl_status_undef = 0;
4252 }
4253 break;
4254
4255 case TPACPI_FAN_WR_ACPI_SFAN:
4256 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4257 rc = -EIO;
4258 else
4259 fan_control_desired_level = 0;
4260 break;
4261
4262 default:
4263 rc = -ENXIO;
4264 }
4265
4266
4267 mutex_unlock(&fan_mutex);
4268 return rc;
4269 }
4270
4271 static int fan_set_speed(int speed)
4272 {
4273 int rc;
4274
4275 if (!fan_control_allowed)
4276 return -EPERM;
4277
4278 if (mutex_lock_interruptible(&fan_mutex))
4279 return -ERESTARTSYS;
4280
4281 rc = 0;
4282 switch (fan_control_access_mode) {
4283 case TPACPI_FAN_WR_ACPI_FANS:
4284 if (speed >= 0 && speed <= 65535) {
4285 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4286 speed, speed, speed))
4287 rc = -EIO;
4288 } else
4289 rc = -EINVAL;
4290 break;
4291
4292 default:
4293 rc = -ENXIO;
4294 }
4295
4296 mutex_unlock(&fan_mutex);
4297 return rc;
4298 }
4299
4300 static int fan_read(char *p)
4301 {
4302 int len = 0;
4303 int rc;
4304 u8 status;
4305 unsigned int speed = 0;
4306
4307 switch (fan_status_access_mode) {
4308 case TPACPI_FAN_RD_ACPI_GFAN:
4309 /* 570, 600e/x, 770e, 770x */
4310 if ((rc = fan_get_status_safe(&status)) < 0)
4311 return rc;
4312
4313 len += sprintf(p + len, "status:\t\t%s\n"
4314 "level:\t\t%d\n",
4315 (status != 0) ? "enabled" : "disabled", status);
4316 break;
4317
4318 case TPACPI_FAN_RD_TPEC:
4319 /* all except 570, 600e/x, 770e, 770x */
4320 if ((rc = fan_get_status_safe(&status)) < 0)
4321 return rc;
4322
4323 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4324 if (status != fan_control_initial_status)
4325 tp_features.fan_ctrl_status_undef = 0;
4326 else
4327 /* Return most likely status. In fact, it
4328 * might be the only possible status */
4329 status = TP_EC_FAN_AUTO;
4330 }
4331
4332 len += sprintf(p + len, "status:\t\t%s\n",
4333 (status != 0) ? "enabled" : "disabled");
4334
4335 if ((rc = fan_get_speed(&speed)) < 0)
4336 return rc;
4337
4338 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4339
4340 if (status & TP_EC_FAN_FULLSPEED)
4341 /* Disengaged mode takes precedence */
4342 len += sprintf(p + len, "level:\t\tdisengaged\n");
4343 else if (status & TP_EC_FAN_AUTO)
4344 len += sprintf(p + len, "level:\t\tauto\n");
4345 else
4346 len += sprintf(p + len, "level:\t\t%d\n", status);
4347 break;
4348
4349 case TPACPI_FAN_NONE:
4350 default:
4351 len += sprintf(p + len, "status:\t\tnot supported\n");
4352 }
4353
4354 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4355 len += sprintf(p + len, "commands:\tlevel <level>");
4356
4357 switch (fan_control_access_mode) {
4358 case TPACPI_FAN_WR_ACPI_SFAN:
4359 len += sprintf(p + len, " (<level> is 0-7)\n");
4360 break;
4361
4362 default:
4363 len += sprintf(p + len, " (<level> is 0-7, "
4364 "auto, disengaged, full-speed)\n");
4365 break;
4366 }
4367 }
4368
4369 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4370 len += sprintf(p + len, "commands:\tenable, disable\n"
4371 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4372 "1-120 (seconds))\n");
4373
4374 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4375 len += sprintf(p + len, "commands:\tspeed <speed>"
4376 " (<speed> is 0-65535)\n");
4377
4378 return len;
4379 }
4380
4381 static int fan_write_cmd_level(const char *cmd, int *rc)
4382 {
4383 int level;
4384
4385 if (strlencmp(cmd, "level auto") == 0)
4386 level = TP_EC_FAN_AUTO;
4387 else if ((strlencmp(cmd, "level disengaged") == 0) |
4388 (strlencmp(cmd, "level full-speed") == 0))
4389 level = TP_EC_FAN_FULLSPEED;
4390 else if (sscanf(cmd, "level %d", &level) != 1)
4391 return 0;
4392
4393 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4394 printk(IBM_ERR "level command accepted for unsupported "
4395 "access mode %d", fan_control_access_mode);
4396
4397 return 1;
4398 }
4399
4400 static int fan_write_cmd_enable(const char *cmd, int *rc)
4401 {
4402 if (strlencmp(cmd, "enable") != 0)
4403 return 0;
4404
4405 if ((*rc = fan_set_enable()) == -ENXIO)
4406 printk(IBM_ERR "enable command accepted for unsupported "
4407 "access mode %d", fan_control_access_mode);
4408
4409 return 1;
4410 }
4411
4412 static int fan_write_cmd_disable(const char *cmd, int *rc)
4413 {
4414 if (strlencmp(cmd, "disable") != 0)
4415 return 0;
4416
4417 if ((*rc = fan_set_disable()) == -ENXIO)
4418 printk(IBM_ERR "disable command accepted for unsupported "
4419 "access mode %d", fan_control_access_mode);
4420
4421 return 1;
4422 }
4423
4424 static int fan_write_cmd_speed(const char *cmd, int *rc)
4425 {
4426 int speed;
4427
4428 /* TODO:
4429 * Support speed <low> <medium> <high> ? */
4430
4431 if (sscanf(cmd, "speed %d", &speed) != 1)
4432 return 0;
4433
4434 if ((*rc = fan_set_speed(speed)) == -ENXIO)
4435 printk(IBM_ERR "speed command accepted for unsupported "
4436 "access mode %d", fan_control_access_mode);
4437
4438 return 1;
4439 }
4440
4441 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4442 {
4443 int interval;
4444
4445 if (sscanf(cmd, "watchdog %d", &interval) != 1)
4446 return 0;
4447
4448 if (interval < 0 || interval > 120)
4449 *rc = -EINVAL;
4450 else
4451 fan_watchdog_maxinterval = interval;
4452
4453 return 1;
4454 }
4455
4456 static int fan_write(char *buf)
4457 {
4458 char *cmd;
4459 int rc = 0;
4460
4461 while (!rc && (cmd = next_cmd(&buf))) {
4462 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4463 fan_write_cmd_level(cmd, &rc)) &&
4464 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4465 (fan_write_cmd_enable(cmd, &rc) ||
4466 fan_write_cmd_disable(cmd, &rc) ||
4467 fan_write_cmd_watchdog(cmd, &rc))) &&
4468 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4469 fan_write_cmd_speed(cmd, &rc))
4470 )
4471 rc = -EINVAL;
4472 else if (!rc)
4473 fan_watchdog_reset();
4474 }
4475
4476 return rc;
4477 }
4478
4479 static struct ibm_struct fan_driver_data = {
4480 .name = "fan",
4481 .read = fan_read,
4482 .write = fan_write,
4483 .exit = fan_exit,
4484 };
4485
4486 /****************************************************************************
4487 ****************************************************************************
4488 *
4489 * Infrastructure
4490 *
4491 ****************************************************************************
4492 ****************************************************************************/
4493
4494 /* sysfs name ---------------------------------------------------------- */
4495 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
4496 struct device_attribute *attr,
4497 char *buf)
4498 {
4499 return snprintf(buf, PAGE_SIZE, "%s\n", IBM_NAME);
4500 }
4501
4502 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
4503 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
4504
4505 /* --------------------------------------------------------------------- */
4506
4507 /* /proc support */
4508 static struct proc_dir_entry *proc_dir;
4509
4510 /* Subdriver registry */
4511 static LIST_HEAD(tpacpi_all_drivers);
4512
4513
4514 /*
4515 * Module and infrastructure proble, init and exit handling
4516 */
4517
4518 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4519 static const char * __init str_supported(int is_supported)
4520 {
4521 static char text_unsupported[] __initdata = "not supported";
4522
4523 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4524 }
4525 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4526
4527 static int __init ibm_init(struct ibm_init_struct *iibm)
4528 {
4529 int ret;
4530 struct ibm_struct *ibm = iibm->data;
4531 struct proc_dir_entry *entry;
4532
4533 BUG_ON(ibm == NULL);
4534
4535 INIT_LIST_HEAD(&ibm->all_drivers);
4536
4537 if (ibm->flags.experimental && !experimental)
4538 return 0;
4539
4540 dbg_printk(TPACPI_DBG_INIT,
4541 "probing for %s\n", ibm->name);
4542
4543 if (iibm->init) {
4544 ret = iibm->init(iibm);
4545 if (ret > 0)
4546 return 0; /* probe failed */
4547 if (ret)
4548 return ret;
4549
4550 ibm->flags.init_called = 1;
4551 }
4552
4553 if (ibm->acpi) {
4554 if (ibm->acpi->hid) {
4555 ret = register_tpacpi_subdriver(ibm);
4556 if (ret)
4557 goto err_out;
4558 }
4559
4560 if (ibm->acpi->notify) {
4561 ret = setup_acpi_notify(ibm);
4562 if (ret == -ENODEV) {
4563 printk(IBM_NOTICE "disabling subdriver %s\n",
4564 ibm->name);
4565 ret = 0;
4566 goto err_out;
4567 }
4568 if (ret < 0)
4569 goto err_out;
4570 }
4571 }
4572
4573 dbg_printk(TPACPI_DBG_INIT,
4574 "%s installed\n", ibm->name);
4575
4576 if (ibm->read) {
4577 entry = create_proc_entry(ibm->name,
4578 S_IFREG | S_IRUGO | S_IWUSR,
4579 proc_dir);
4580 if (!entry) {
4581 printk(IBM_ERR "unable to create proc entry %s\n",
4582 ibm->name);
4583 ret = -ENODEV;
4584 goto err_out;
4585 }
4586 entry->owner = THIS_MODULE;
4587 entry->data = ibm;
4588 entry->read_proc = &dispatch_procfs_read;
4589 if (ibm->write)
4590 entry->write_proc = &dispatch_procfs_write;
4591 ibm->flags.proc_created = 1;
4592 }
4593
4594 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4595
4596 return 0;
4597
4598 err_out:
4599 dbg_printk(TPACPI_DBG_INIT,
4600 "%s: at error exit path with result %d\n",
4601 ibm->name, ret);
4602
4603 ibm_exit(ibm);
4604 return (ret < 0)? ret : 0;
4605 }
4606
4607 static void ibm_exit(struct ibm_struct *ibm)
4608 {
4609 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4610
4611 list_del_init(&ibm->all_drivers);
4612
4613 if (ibm->flags.acpi_notify_installed) {
4614 dbg_printk(TPACPI_DBG_EXIT,
4615 "%s: acpi_remove_notify_handler\n", ibm->name);
4616 BUG_ON(!ibm->acpi);
4617 acpi_remove_notify_handler(*ibm->acpi->handle,
4618 ibm->acpi->type,
4619 dispatch_acpi_notify);
4620 ibm->flags.acpi_notify_installed = 0;
4621 ibm->flags.acpi_notify_installed = 0;
4622 }
4623
4624 if (ibm->flags.proc_created) {
4625 dbg_printk(TPACPI_DBG_EXIT,
4626 "%s: remove_proc_entry\n", ibm->name);
4627 remove_proc_entry(ibm->name, proc_dir);
4628 ibm->flags.proc_created = 0;
4629 }
4630
4631 if (ibm->flags.acpi_driver_registered) {
4632 dbg_printk(TPACPI_DBG_EXIT,
4633 "%s: acpi_bus_unregister_driver\n", ibm->name);
4634 BUG_ON(!ibm->acpi);
4635 acpi_bus_unregister_driver(ibm->acpi->driver);
4636 kfree(ibm->acpi->driver);
4637 ibm->acpi->driver = NULL;
4638 ibm->flags.acpi_driver_registered = 0;
4639 }
4640
4641 if (ibm->flags.init_called && ibm->exit) {
4642 ibm->exit();
4643 ibm->flags.init_called = 0;
4644 }
4645
4646 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4647 }
4648
4649 /* Probing */
4650
4651 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4652 {
4653 const struct dmi_device *dev = NULL;
4654 char ec_fw_string[18];
4655
4656 if (!tp)
4657 return;
4658
4659 memset(tp, 0, sizeof(*tp));
4660
4661 if (dmi_name_in_vendors("IBM"))
4662 tp->vendor = PCI_VENDOR_ID_IBM;
4663 else if (dmi_name_in_vendors("LENOVO"))
4664 tp->vendor = PCI_VENDOR_ID_LENOVO;
4665 else
4666 return;
4667
4668 tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4669 GFP_KERNEL);
4670 if (!tp->bios_version_str)
4671 return;
4672 tp->bios_model = tp->bios_version_str[0]
4673 | (tp->bios_version_str[1] << 8);
4674
4675 /*
4676 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4677 * X32 or newer, all Z series; Some models must have an
4678 * up-to-date BIOS or they will not be detected.
4679 *
4680 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4681 */
4682 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4683 if (sscanf(dev->name,
4684 "IBM ThinkPad Embedded Controller -[%17c",
4685 ec_fw_string) == 1) {
4686 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4687 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4688
4689 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4690 tp->ec_model = ec_fw_string[0]
4691 | (ec_fw_string[1] << 8);
4692 break;
4693 }
4694 }
4695
4696 tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4697 GFP_KERNEL);
4698 if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4699 kfree(tp->model_str);
4700 tp->model_str = NULL;
4701 }
4702 }
4703
4704 static int __init probe_for_thinkpad(void)
4705 {
4706 int is_thinkpad;
4707
4708 if (acpi_disabled)
4709 return -ENODEV;
4710
4711 /*
4712 * Non-ancient models have better DMI tagging, but very old models
4713 * don't.
4714 */
4715 is_thinkpad = (thinkpad_id.model_str != NULL);
4716
4717 /* ec is required because many other handles are relative to it */
4718 IBM_ACPIHANDLE_INIT(ec);
4719 if (!ec_handle) {
4720 if (is_thinkpad)
4721 printk(IBM_ERR
4722 "Not yet supported ThinkPad detected!\n");
4723 return -ENODEV;
4724 }
4725
4726 /*
4727 * Risks a regression on very old machines, but reduces potential
4728 * false positives a damn great deal
4729 */
4730 if (!is_thinkpad)
4731 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4732
4733 if (!is_thinkpad && !force_load)
4734 return -ENODEV;
4735
4736 return 0;
4737 }
4738
4739
4740 /* Module init, exit, parameters */
4741
4742 static struct ibm_init_struct ibms_init[] __initdata = {
4743 {
4744 .init = thinkpad_acpi_driver_init,
4745 .data = &thinkpad_acpi_driver_data,
4746 },
4747 {
4748 .init = hotkey_init,
4749 .data = &hotkey_driver_data,
4750 },
4751 {
4752 .init = bluetooth_init,
4753 .data = &bluetooth_driver_data,
4754 },
4755 {
4756 .init = wan_init,
4757 .data = &wan_driver_data,
4758 },
4759 {
4760 .init = video_init,
4761 .data = &video_driver_data,
4762 },
4763 {
4764 .init = light_init,
4765 .data = &light_driver_data,
4766 },
4767 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4768 {
4769 .init = dock_init,
4770 .data = &dock_driver_data[0],
4771 },
4772 {
4773 .init = dock_init2,
4774 .data = &dock_driver_data[1],
4775 },
4776 #endif
4777 #ifdef CONFIG_THINKPAD_ACPI_BAY
4778 {
4779 .init = bay_init,
4780 .data = &bay_driver_data,
4781 },
4782 #endif
4783 {
4784 .init = cmos_init,
4785 .data = &cmos_driver_data,
4786 },
4787 {
4788 .init = led_init,
4789 .data = &led_driver_data,
4790 },
4791 {
4792 .init = beep_init,
4793 .data = &beep_driver_data,
4794 },
4795 {
4796 .init = thermal_init,
4797 .data = &thermal_driver_data,
4798 },
4799 {
4800 .data = &ecdump_driver_data,
4801 },
4802 {
4803 .init = brightness_init,
4804 .data = &brightness_driver_data,
4805 },
4806 {
4807 .data = &volume_driver_data,
4808 },
4809 {
4810 .init = fan_init,
4811 .data = &fan_driver_data,
4812 },
4813 };
4814
4815 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4816 {
4817 unsigned int i;
4818 struct ibm_struct *ibm;
4819
4820 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4821 ibm = ibms_init[i].data;
4822 BUG_ON(ibm == NULL);
4823
4824 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4825 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4826 return -ENOSPC;
4827 strcpy(ibms_init[i].param, val);
4828 strcat(ibms_init[i].param, ",");
4829 return 0;
4830 }
4831 }
4832
4833 return -EINVAL;
4834 }
4835
4836 static int experimental;
4837 module_param(experimental, int, 0);
4838
4839 static u32 dbg_level;
4840 module_param_named(debug, dbg_level, uint, 0);
4841
4842 static int force_load;
4843 module_param(force_load, bool, 0);
4844
4845 static int fan_control_allowed;
4846 module_param_named(fan_control, fan_control_allowed, bool, 0);
4847
4848 static int brightness_mode;
4849 module_param_named(brightness_mode, brightness_mode, int, 0);
4850
4851 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4852 module_param(brightness_enable, uint, 0);
4853
4854 static unsigned int hotkey_report_mode;
4855 module_param(hotkey_report_mode, uint, 0);
4856
4857 #define IBM_PARAM(feature) \
4858 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4859
4860 IBM_PARAM(hotkey);
4861 IBM_PARAM(bluetooth);
4862 IBM_PARAM(video);
4863 IBM_PARAM(light);
4864 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4865 IBM_PARAM(dock);
4866 #endif
4867 #ifdef CONFIG_THINKPAD_ACPI_BAY
4868 IBM_PARAM(bay);
4869 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4870 IBM_PARAM(cmos);
4871 IBM_PARAM(led);
4872 IBM_PARAM(beep);
4873 IBM_PARAM(ecdump);
4874 IBM_PARAM(brightness);
4875 IBM_PARAM(volume);
4876 IBM_PARAM(fan);
4877
4878 static int __init thinkpad_acpi_module_init(void)
4879 {
4880 int ret, i;
4881
4882 tpacpi_lifecycle = TPACPI_LIFE_INIT;
4883
4884 /* Parameter checking */
4885 if (hotkey_report_mode > 2)
4886 return -EINVAL;
4887
4888 /* Driver-level probe */
4889
4890 get_thinkpad_model_data(&thinkpad_id);
4891 ret = probe_for_thinkpad();
4892 if (ret) {
4893 thinkpad_acpi_module_exit();
4894 return ret;
4895 }
4896
4897 /* Driver initialization */
4898
4899 IBM_ACPIHANDLE_INIT(ecrd);
4900 IBM_ACPIHANDLE_INIT(ecwr);
4901
4902 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4903 if (!proc_dir) {
4904 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4905 thinkpad_acpi_module_exit();
4906 return -ENODEV;
4907 }
4908 proc_dir->owner = THIS_MODULE;
4909
4910 ret = platform_driver_register(&tpacpi_pdriver);
4911 if (ret) {
4912 printk(IBM_ERR "unable to register main platform driver\n");
4913 thinkpad_acpi_module_exit();
4914 return ret;
4915 }
4916 tp_features.platform_drv_registered = 1;
4917
4918 ret = platform_driver_register(&tpacpi_hwmon_pdriver);
4919 if (ret) {
4920 printk(IBM_ERR "unable to register hwmon platform driver\n");
4921 thinkpad_acpi_module_exit();
4922 return ret;
4923 }
4924 tp_features.sensors_pdrv_registered = 1;
4925
4926 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4927 if (!ret) {
4928 tp_features.platform_drv_attrs_registered = 1;
4929 ret = tpacpi_create_driver_attributes(&tpacpi_hwmon_pdriver.driver);
4930 }
4931 if (ret) {
4932 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4933 thinkpad_acpi_module_exit();
4934 return ret;
4935 }
4936 tp_features.sensors_pdrv_attrs_registered = 1;
4937
4938
4939 /* Device initialization */
4940 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4941 NULL, 0);
4942 if (IS_ERR(tpacpi_pdev)) {
4943 ret = PTR_ERR(tpacpi_pdev);
4944 tpacpi_pdev = NULL;
4945 printk(IBM_ERR "unable to register platform device\n");
4946 thinkpad_acpi_module_exit();
4947 return ret;
4948 }
4949 tpacpi_sensors_pdev = platform_device_register_simple(
4950 IBM_HWMON_DRVR_NAME,
4951 -1, NULL, 0);
4952 if (IS_ERR(tpacpi_sensors_pdev)) {
4953 ret = PTR_ERR(tpacpi_sensors_pdev);
4954 tpacpi_sensors_pdev = NULL;
4955 printk(IBM_ERR "unable to register hwmon platform device\n");
4956 thinkpad_acpi_module_exit();
4957 return ret;
4958 }
4959 ret = device_create_file(&tpacpi_sensors_pdev->dev,
4960 &dev_attr_thinkpad_acpi_pdev_name);
4961 if (ret) {
4962 printk(IBM_ERR
4963 "unable to create sysfs hwmon device attributes\n");
4964 thinkpad_acpi_module_exit();
4965 return ret;
4966 }
4967 tp_features.sensors_pdev_attrs_registered = 1;
4968 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
4969 if (IS_ERR(tpacpi_hwmon)) {
4970 ret = PTR_ERR(tpacpi_hwmon);
4971 tpacpi_hwmon = NULL;
4972 printk(IBM_ERR "unable to register hwmon device\n");
4973 thinkpad_acpi_module_exit();
4974 return ret;
4975 }
4976 mutex_init(&tpacpi_inputdev_send_mutex);
4977 tpacpi_inputdev = input_allocate_device();
4978 if (!tpacpi_inputdev) {
4979 printk(IBM_ERR "unable to allocate input device\n");
4980 thinkpad_acpi_module_exit();
4981 return -ENOMEM;
4982 } else {
4983 /* Prepare input device, but don't register */
4984 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4985 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4986 tpacpi_inputdev->id.bustype = BUS_HOST;
4987 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
4988 thinkpad_id.vendor :
4989 PCI_VENDOR_ID_IBM;
4990 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4991 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4992 }
4993 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4994 ret = ibm_init(&ibms_init[i]);
4995 if (ret >= 0 && *ibms_init[i].param)
4996 ret = ibms_init[i].data->write(ibms_init[i].param);
4997 if (ret < 0) {
4998 thinkpad_acpi_module_exit();
4999 return ret;
5000 }
5001 }
5002 ret = input_register_device(tpacpi_inputdev);
5003 if (ret < 0) {
5004 printk(IBM_ERR "unable to register input device\n");
5005 thinkpad_acpi_module_exit();
5006 return ret;
5007 } else {
5008 tp_features.input_device_registered = 1;
5009 }
5010
5011 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
5012 return 0;
5013 }
5014
5015 static void thinkpad_acpi_module_exit(void)
5016 {
5017 struct ibm_struct *ibm, *itmp;
5018
5019 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
5020
5021 list_for_each_entry_safe_reverse(ibm, itmp,
5022 &tpacpi_all_drivers,
5023 all_drivers) {
5024 ibm_exit(ibm);
5025 }
5026
5027 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
5028
5029 if (tpacpi_inputdev) {
5030 if (tp_features.input_device_registered)
5031 input_unregister_device(tpacpi_inputdev);
5032 else
5033 input_free_device(tpacpi_inputdev);
5034 }
5035
5036 if (tpacpi_hwmon)
5037 hwmon_device_unregister(tpacpi_hwmon);
5038
5039 if (tp_features.sensors_pdev_attrs_registered)
5040 device_remove_file(&tpacpi_sensors_pdev->dev,
5041 &dev_attr_thinkpad_acpi_pdev_name);
5042 if (tpacpi_sensors_pdev)
5043 platform_device_unregister(tpacpi_sensors_pdev);
5044 if (tpacpi_pdev)
5045 platform_device_unregister(tpacpi_pdev);
5046
5047 if (tp_features.sensors_pdrv_attrs_registered)
5048 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
5049 if (tp_features.platform_drv_attrs_registered)
5050 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
5051
5052 if (tp_features.sensors_pdrv_registered)
5053 platform_driver_unregister(&tpacpi_hwmon_pdriver);
5054
5055 if (tp_features.platform_drv_registered)
5056 platform_driver_unregister(&tpacpi_pdriver);
5057
5058 if (proc_dir)
5059 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
5060
5061 kfree(thinkpad_id.bios_version_str);
5062 kfree(thinkpad_id.ec_version_str);
5063 kfree(thinkpad_id.model_str);
5064 }
5065
5066 module_init(thinkpad_acpi_module_init);
5067 module_exit(thinkpad_acpi_module_exit);
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