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ACPI: thinkpad-acpi: dequeue all pending hot key events at once (v2.2)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blob3efe81b1b73c455847e7a9a6222800ee9d411f73
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 "0.16"
25 #define TPACPI_SYSFS_VERSION 0x010000
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 class_device *tpacpi_hwmon;
530 static struct input_dev *tpacpi_inputdev;
531 static struct mutex tpacpi_inputdev_send_mutex;
532
533
534 static int tpacpi_resume_handler(struct platform_device *pdev)
535 {
536 struct ibm_struct *ibm, *itmp;
537
538 list_for_each_entry_safe(ibm, itmp,
539 &tpacpi_all_drivers,
540 all_drivers) {
541 if (ibm->resume)
542 (ibm->resume)();
543 }
544
545 return 0;
546 }
547
548 static struct platform_driver tpacpi_pdriver = {
549 .driver = {
550 .name = IBM_DRVR_NAME,
551 .owner = THIS_MODULE,
552 },
553 .resume = tpacpi_resume_handler,
554 };
555
556
557 /*************************************************************************
558 * thinkpad-acpi driver attributes
559 */
560
561 /* interface_version --------------------------------------------------- */
562 static ssize_t tpacpi_driver_interface_version_show(
563 struct device_driver *drv,
564 char *buf)
565 {
566 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
567 }
568
569 static DRIVER_ATTR(interface_version, S_IRUGO,
570 tpacpi_driver_interface_version_show, NULL);
571
572 /* debug_level --------------------------------------------------------- */
573 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
574 char *buf)
575 {
576 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
577 }
578
579 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
580 const char *buf, size_t count)
581 {
582 unsigned long t;
583
584 if (parse_strtoul(buf, 0xffff, &t))
585 return -EINVAL;
586
587 dbg_level = t;
588
589 return count;
590 }
591
592 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
593 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
594
595 /* version ------------------------------------------------------------- */
596 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
597 char *buf)
598 {
599 return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
600 }
601
602 static DRIVER_ATTR(version, S_IRUGO,
603 tpacpi_driver_version_show, NULL);
604
605 /* --------------------------------------------------------------------- */
606
607 static struct driver_attribute* tpacpi_driver_attributes[] = {
608 &driver_attr_debug_level, &driver_attr_version,
609 &driver_attr_interface_version,
610 };
611
612 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
613 {
614 int i, res;
615
616 i = 0;
617 res = 0;
618 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
619 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
620 i++;
621 }
622
623 return res;
624 }
625
626 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
627 {
628 int i;
629
630 for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
631 driver_remove_file(drv, tpacpi_driver_attributes[i]);
632 }
633
634 /*************************************************************************
635 * sysfs support helpers
636 */
637
638 struct attribute_set_obj {
639 struct attribute_set s;
640 struct attribute *a;
641 } __attribute__((packed));
642
643 static struct attribute_set *create_attr_set(unsigned int max_members,
644 const char* name)
645 {
646 struct attribute_set_obj *sobj;
647
648 if (max_members == 0)
649 return NULL;
650
651 /* Allocates space for implicit NULL at the end too */
652 sobj = kzalloc(sizeof(struct attribute_set_obj) +
653 max_members * sizeof(struct attribute *),
654 GFP_KERNEL);
655 if (!sobj)
656 return NULL;
657 sobj->s.max_members = max_members;
658 sobj->s.group.attrs = &sobj->a;
659 sobj->s.group.name = name;
660
661 return &sobj->s;
662 }
663
664 /* not multi-threaded safe, use it in a single thread per set */
665 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
666 {
667 if (!s || !attr)
668 return -EINVAL;
669
670 if (s->members >= s->max_members)
671 return -ENOMEM;
672
673 s->group.attrs[s->members] = attr;
674 s->members++;
675
676 return 0;
677 }
678
679 static int add_many_to_attr_set(struct attribute_set* s,
680 struct attribute **attr,
681 unsigned int count)
682 {
683 int i, res;
684
685 for (i = 0; i < count; i++) {
686 res = add_to_attr_set(s, attr[i]);
687 if (res)
688 return res;
689 }
690
691 return 0;
692 }
693
694 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
695 {
696 sysfs_remove_group(kobj, &s->group);
697 destroy_attr_set(s);
698 }
699
700 static int parse_strtoul(const char *buf,
701 unsigned long max, unsigned long *value)
702 {
703 char *endp;
704
705 *value = simple_strtoul(buf, &endp, 0);
706 while (*endp && isspace(*endp))
707 endp++;
708 if (*endp || *value > max)
709 return -EINVAL;
710
711 return 0;
712 }
713
714 /****************************************************************************
715 ****************************************************************************
716 *
717 * Subdrivers
718 *
719 ****************************************************************************
720 ****************************************************************************/
721
722 /*************************************************************************
723 * thinkpad-acpi init subdriver
724 */
725
726 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
727 {
728 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
729 printk(IBM_INFO "%s\n", IBM_URL);
730
731 printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
732 (thinkpad_id.bios_version_str) ?
733 thinkpad_id.bios_version_str : "unknown",
734 (thinkpad_id.ec_version_str) ?
735 thinkpad_id.ec_version_str : "unknown");
736
737 if (thinkpad_id.vendor && thinkpad_id.model_str)
738 printk(IBM_INFO "%s %s\n",
739 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
740 "IBM" : ((thinkpad_id.vendor ==
741 PCI_VENDOR_ID_LENOVO) ?
742 "Lenovo" : "Unknown vendor"),
743 thinkpad_id.model_str);
744
745 return 0;
746 }
747
748 static int thinkpad_acpi_driver_read(char *p)
749 {
750 int len = 0;
751
752 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
753 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
754
755 return len;
756 }
757
758 static struct ibm_struct thinkpad_acpi_driver_data = {
759 .name = "driver",
760 .read = thinkpad_acpi_driver_read,
761 };
762
763 /*************************************************************************
764 * Hotkey subdriver
765 */
766
767 static int hotkey_orig_status;
768 static u32 hotkey_orig_mask;
769 static u32 hotkey_all_mask;
770 static u32 hotkey_reserved_mask;
771
772 static u16 *hotkey_keycode_map;
773
774 static struct attribute_set *hotkey_dev_attributes;
775
776 static int hotkey_get_wlsw(int *status)
777 {
778 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
779 return -EIO;
780 return 0;
781 }
782
783 /* sysfs hotkey enable ------------------------------------------------- */
784 static ssize_t hotkey_enable_show(struct device *dev,
785 struct device_attribute *attr,
786 char *buf)
787 {
788 int res, status;
789 u32 mask;
790
791 res = hotkey_get(&status, &mask);
792 if (res)
793 return res;
794
795 return snprintf(buf, PAGE_SIZE, "%d\n", status);
796 }
797
798 static ssize_t hotkey_enable_store(struct device *dev,
799 struct device_attribute *attr,
800 const char *buf, size_t count)
801 {
802 unsigned long t;
803 int res, status;
804 u32 mask;
805
806 if (parse_strtoul(buf, 1, &t))
807 return -EINVAL;
808
809 res = hotkey_get(&status, &mask);
810 if (!res)
811 res = hotkey_set(t, mask);
812
813 return (res) ? res : count;
814 }
815
816 static struct device_attribute dev_attr_hotkey_enable =
817 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
818 hotkey_enable_show, hotkey_enable_store);
819
820 /* sysfs hotkey mask --------------------------------------------------- */
821 static ssize_t hotkey_mask_show(struct device *dev,
822 struct device_attribute *attr,
823 char *buf)
824 {
825 int res, status;
826 u32 mask;
827
828 res = hotkey_get(&status, &mask);
829 if (res)
830 return res;
831
832 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
833 }
834
835 static ssize_t hotkey_mask_store(struct device *dev,
836 struct device_attribute *attr,
837 const char *buf, size_t count)
838 {
839 unsigned long t;
840 int res, status;
841 u32 mask;
842
843 if (parse_strtoul(buf, 0xffffffffUL, &t))
844 return -EINVAL;
845
846 res = hotkey_get(&status, &mask);
847 if (!res)
848 hotkey_set(status, t);
849
850 return (res) ? res : count;
851 }
852
853 static struct device_attribute dev_attr_hotkey_mask =
854 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
855 hotkey_mask_show, hotkey_mask_store);
856
857 /* sysfs hotkey bios_enabled ------------------------------------------- */
858 static ssize_t hotkey_bios_enabled_show(struct device *dev,
859 struct device_attribute *attr,
860 char *buf)
861 {
862 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
863 }
864
865 static struct device_attribute dev_attr_hotkey_bios_enabled =
866 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
867
868 /* sysfs hotkey bios_mask ---------------------------------------------- */
869 static ssize_t hotkey_bios_mask_show(struct device *dev,
870 struct device_attribute *attr,
871 char *buf)
872 {
873 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
874 }
875
876 static struct device_attribute dev_attr_hotkey_bios_mask =
877 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
878
879 /* sysfs hotkey all_mask ----------------------------------------------- */
880 static ssize_t hotkey_all_mask_show(struct device *dev,
881 struct device_attribute *attr,
882 char *buf)
883 {
884 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
885 }
886
887 static struct device_attribute dev_attr_hotkey_all_mask =
888 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
889
890 /* sysfs hotkey recommended_mask --------------------------------------- */
891 static ssize_t hotkey_recommended_mask_show(struct device *dev,
892 struct device_attribute *attr,
893 char *buf)
894 {
895 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
896 hotkey_all_mask & ~hotkey_reserved_mask);
897 }
898
899 static struct device_attribute dev_attr_hotkey_recommended_mask =
900 __ATTR(hotkey_recommended_mask, S_IRUGO,
901 hotkey_recommended_mask_show, NULL);
902
903 /* sysfs hotkey radio_sw ----------------------------------------------- */
904 static ssize_t hotkey_radio_sw_show(struct device *dev,
905 struct device_attribute *attr,
906 char *buf)
907 {
908 int res, s;
909 res = hotkey_get_wlsw(&s);
910 if (res < 0)
911 return res;
912
913 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
914 }
915
916 static struct device_attribute dev_attr_hotkey_radio_sw =
917 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
918
919 /* sysfs hotkey report_mode -------------------------------------------- */
920 static ssize_t hotkey_report_mode_show(struct device *dev,
921 struct device_attribute *attr,
922 char *buf)
923 {
924 return snprintf(buf, PAGE_SIZE, "%d\n",
925 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
926 }
927
928 static struct device_attribute dev_attr_hotkey_report_mode =
929 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
930
931 /* --------------------------------------------------------------------- */
932
933 static struct attribute *hotkey_attributes[] __initdata = {
934 &dev_attr_hotkey_enable.attr,
935 &dev_attr_hotkey_report_mode.attr,
936 };
937
938 static struct attribute *hotkey_mask_attributes[] __initdata = {
939 &dev_attr_hotkey_mask.attr,
940 &dev_attr_hotkey_bios_enabled.attr,
941 &dev_attr_hotkey_bios_mask.attr,
942 &dev_attr_hotkey_all_mask.attr,
943 &dev_attr_hotkey_recommended_mask.attr,
944 };
945
946 static int __init hotkey_init(struct ibm_init_struct *iibm)
947 {
948
949 static u16 ibm_keycode_map[] __initdata = {
950 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
951 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
952 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
953 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
954 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
955 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
956 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
957 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
958 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
959 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
960 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
961 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
962 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
963 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
964 KEY_RESERVED, /* 0x14: VOLUME UP */
965 KEY_RESERVED, /* 0x15: VOLUME DOWN */
966 KEY_RESERVED, /* 0x16: MUTE */
967 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
968 /* (assignments unknown, please report if found) */
969 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
970 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
971 };
972 static u16 lenovo_keycode_map[] __initdata = {
973 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
974 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
975 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
976 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
977 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
978 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
979 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
980 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
981 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
982 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
983 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
984 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
985 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
986 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
987 KEY_RESERVED, /* 0x14: VOLUME UP */
988 KEY_RESERVED, /* 0x15: VOLUME DOWN */
989 KEY_RESERVED, /* 0x16: MUTE */
990 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
991 /* (assignments unknown, please report if found) */
992 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
993 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
994 };
995
996 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
997 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
998 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
999
1000 int res, i;
1001 int status;
1002 int hkeyv;
1003
1004 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1005
1006 BUG_ON(!tpacpi_inputdev);
1007
1008 IBM_ACPIHANDLE_INIT(hkey);
1009 mutex_init(&hotkey_mutex);
1010
1011 /* hotkey not supported on 570 */
1012 tp_features.hotkey = hkey_handle != NULL;
1013
1014 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1015 str_supported(tp_features.hotkey));
1016
1017 if (tp_features.hotkey) {
1018 hotkey_dev_attributes = create_attr_set(8, NULL);
1019 if (!hotkey_dev_attributes)
1020 return -ENOMEM;
1021 res = add_many_to_attr_set(hotkey_dev_attributes,
1022 hotkey_attributes,
1023 ARRAY_SIZE(hotkey_attributes));
1024 if (res)
1025 return res;
1026
1027 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1028 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
1029 for HKEY interface version 0x100 */
1030 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1031 if ((hkeyv >> 8) != 1) {
1032 printk(IBM_ERR "unknown version of the "
1033 "HKEY interface: 0x%x\n", hkeyv);
1034 printk(IBM_ERR "please report this to %s\n",
1035 IBM_MAIL);
1036 } else {
1037 /*
1038 * MHKV 0x100 in A31, R40, R40e,
1039 * T4x, X31, and later
1040 * */
1041 tp_features.hotkey_mask = 1;
1042 }
1043 }
1044
1045 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1046 str_supported(tp_features.hotkey_mask));
1047
1048 if (tp_features.hotkey_mask) {
1049 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1050 "MHKA", "qd")) {
1051 printk(IBM_ERR
1052 "missing MHKA handler, "
1053 "please report this to %s\n",
1054 IBM_MAIL);
1055 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
1056 }
1057 }
1058
1059 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
1060 if (!res && tp_features.hotkey_mask) {
1061 res = add_many_to_attr_set(hotkey_dev_attributes,
1062 hotkey_mask_attributes,
1063 ARRAY_SIZE(hotkey_mask_attributes));
1064 }
1065
1066 /* Not all thinkpads have a hardware radio switch */
1067 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1068 tp_features.hotkey_wlsw = 1;
1069 printk(IBM_INFO
1070 "radio switch found; radios are %s\n",
1071 enabled(status, 0));
1072 res = add_to_attr_set(hotkey_dev_attributes,
1073 &dev_attr_hotkey_radio_sw.attr);
1074 }
1075
1076 if (!res)
1077 res = register_attr_set_with_sysfs(
1078 hotkey_dev_attributes,
1079 &tpacpi_pdev->dev.kobj);
1080 if (res)
1081 return res;
1082
1083 /* Set up key map */
1084
1085 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1086 GFP_KERNEL);
1087 if (!hotkey_keycode_map) {
1088 printk(IBM_ERR "failed to allocate memory for key map\n");
1089 return -ENOMEM;
1090 }
1091
1092 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1093 dbg_printk(TPACPI_DBG_INIT,
1094 "using Lenovo default hot key map\n");
1095 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1096 TPACPI_HOTKEY_MAP_SIZE);
1097 } else {
1098 dbg_printk(TPACPI_DBG_INIT,
1099 "using IBM default hot key map\n");
1100 memcpy(hotkey_keycode_map, &ibm_keycode_map,
1101 TPACPI_HOTKEY_MAP_SIZE);
1102 }
1103
1104 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1105 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1106 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1107 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1108 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1109 tpacpi_inputdev->keycode = hotkey_keycode_map;
1110 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1111 if (hotkey_keycode_map[i] != KEY_RESERVED) {
1112 set_bit(hotkey_keycode_map[i],
1113 tpacpi_inputdev->keybit);
1114 } else {
1115 if (i < sizeof(hotkey_reserved_mask)*8)
1116 hotkey_reserved_mask |= 1 << i;
1117 }
1118 }
1119
1120 if (tp_features.hotkey_wlsw) {
1121 set_bit(EV_SW, tpacpi_inputdev->evbit);
1122 set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1123 }
1124
1125 dbg_printk(TPACPI_DBG_INIT,
1126 "enabling hot key handling\n");
1127 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1128 | hotkey_orig_mask);
1129 if (res)
1130 return res;
1131
1132 dbg_printk(TPACPI_DBG_INIT,
1133 "legacy hot key reporting over procfs %s\n",
1134 (hotkey_report_mode < 2) ?
1135 "enabled" : "disabled");
1136 }
1137
1138 return (tp_features.hotkey)? 0 : 1;
1139 }
1140
1141 static void hotkey_exit(void)
1142 {
1143 int res;
1144
1145 if (tp_features.hotkey) {
1146 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1147 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1148 if (res)
1149 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1150 }
1151
1152 if (hotkey_dev_attributes) {
1153 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1154 hotkey_dev_attributes = NULL;
1155 }
1156 }
1157
1158 static void tpacpi_input_send_key(unsigned int scancode,
1159 unsigned int keycode)
1160 {
1161 if (keycode != KEY_RESERVED) {
1162 mutex_lock(&tpacpi_inputdev_send_mutex);
1163
1164 input_report_key(tpacpi_inputdev, keycode, 1);
1165 if (keycode == KEY_UNKNOWN)
1166 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1167 scancode);
1168 input_sync(tpacpi_inputdev);
1169
1170 input_report_key(tpacpi_inputdev, keycode, 0);
1171 if (keycode == KEY_UNKNOWN)
1172 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1173 scancode);
1174 input_sync(tpacpi_inputdev);
1175
1176 mutex_unlock(&tpacpi_inputdev_send_mutex);
1177 }
1178 }
1179
1180 static void tpacpi_input_send_radiosw(void)
1181 {
1182 int wlsw;
1183
1184 mutex_lock(&tpacpi_inputdev_send_mutex);
1185
1186 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1187 input_report_switch(tpacpi_inputdev,
1188 SW_RADIO, !!wlsw);
1189 input_sync(tpacpi_inputdev);
1190 }
1191
1192 mutex_unlock(&tpacpi_inputdev_send_mutex);
1193 }
1194
1195 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1196 {
1197 u32 hkey;
1198 unsigned int keycode, scancode;
1199 int send_acpi_ev;
1200
1201 if (event != 0x80) {
1202 printk(IBM_ERR "unknown HKEY notification event %d\n", event);
1203 /* forward it to userspace, maybe it knows how to handle it */
1204 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1205 ibm->acpi->device->dev.bus_id,
1206 event, 0);
1207 return;
1208 }
1209
1210 while (1) {
1211 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1212 printk(IBM_ERR "failed to retrieve HKEY event\n");
1213 return;
1214 }
1215
1216 if (hkey == 0) {
1217 /* queue empty */
1218 return;
1219 }
1220
1221 send_acpi_ev = 0;
1222
1223 switch (hkey >> 12) {
1224 case 1:
1225 /* 0x1000-0x1FFF: key presses */
1226 scancode = hkey & 0xfff;
1227 if (scancode > 0 && scancode < 0x21) {
1228 scancode--;
1229 keycode = hotkey_keycode_map[scancode];
1230 tpacpi_input_send_key(scancode, keycode);
1231 } else {
1232 printk(IBM_ERR
1233 "hotkey 0x%04x out of range for keyboard map\n",
1234 hkey);
1235 send_acpi_ev = 1;
1236 }
1237 break;
1238 case 5:
1239 /* 0x5000-0x5FFF: LID */
1240 /* we don't handle it through this path, just
1241 * eat up known LID events */
1242 if (hkey != 0x5001 && hkey != 0x5002) {
1243 printk(IBM_ERR
1244 "unknown LID-related HKEY event: 0x%04x\n",
1245 hkey);
1246 send_acpi_ev = 1;
1247 }
1248 break;
1249 case 7:
1250 /* 0x7000-0x7FFF: misc */
1251 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1252 tpacpi_input_send_radiosw();
1253 break;
1254 }
1255 /* fallthrough to default */
1256 default:
1257 /* case 2: dock-related */
1258 /* 0x2305 - T43 waking up due to bay lever eject while aslept */
1259 /* case 3: ultra-bay related. maybe bay in dock? */
1260 /* 0x3003 - T43 after wake up by bay lever eject (0x2305) */
1261 printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
1262 send_acpi_ev = 1;
1263 }
1264
1265 /* Legacy events */
1266 if (send_acpi_ev || hotkey_report_mode < 2)
1267 acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
1268
1269 /* netlink events */
1270 if (send_acpi_ev) {
1271 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1272 ibm->acpi->device->dev.bus_id,
1273 event, hkey);
1274 }
1275 }
1276 }
1277
1278 static void hotkey_resume(void)
1279 {
1280 tpacpi_input_send_radiosw();
1281 }
1282
1283 /*
1284 * Call with hotkey_mutex held
1285 */
1286 static int hotkey_get(int *status, u32 *mask)
1287 {
1288 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1289 return -EIO;
1290
1291 if (tp_features.hotkey_mask)
1292 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1293 return -EIO;
1294
1295 return 0;
1296 }
1297
1298 /*
1299 * Call with hotkey_mutex held
1300 */
1301 static int hotkey_set(int status, u32 mask)
1302 {
1303 int i;
1304
1305 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1306 return -EIO;
1307
1308 if (tp_features.hotkey_mask)
1309 for (i = 0; i < 32; i++) {
1310 int bit = ((1 << i) & mask) != 0;
1311 if (!acpi_evalf(hkey_handle,
1312 NULL, "MHKM", "vdd", i + 1, bit))
1313 return -EIO;
1314 }
1315
1316 return 0;
1317 }
1318
1319 /* procfs -------------------------------------------------------------- */
1320 static int hotkey_read(char *p)
1321 {
1322 int res, status;
1323 u32 mask;
1324 int len = 0;
1325
1326 if (!tp_features.hotkey) {
1327 len += sprintf(p + len, "status:\t\tnot supported\n");
1328 return len;
1329 }
1330
1331 res = mutex_lock_interruptible(&hotkey_mutex);
1332 if (res < 0)
1333 return res;
1334 res = hotkey_get(&status, &mask);
1335 mutex_unlock(&hotkey_mutex);
1336 if (res)
1337 return res;
1338
1339 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1340 if (tp_features.hotkey_mask) {
1341 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1342 len += sprintf(p + len,
1343 "commands:\tenable, disable, reset, <mask>\n");
1344 } else {
1345 len += sprintf(p + len, "mask:\t\tnot supported\n");
1346 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1347 }
1348
1349 return len;
1350 }
1351
1352 static int hotkey_write(char *buf)
1353 {
1354 int res, status;
1355 u32 mask;
1356 char *cmd;
1357 int do_cmd = 0;
1358
1359 if (!tp_features.hotkey)
1360 return -ENODEV;
1361
1362 res = mutex_lock_interruptible(&hotkey_mutex);
1363 if (res < 0)
1364 return res;
1365
1366 res = hotkey_get(&status, &mask);
1367 if (res)
1368 goto errexit;
1369
1370 res = 0;
1371 while ((cmd = next_cmd(&buf))) {
1372 if (strlencmp(cmd, "enable") == 0) {
1373 status = 1;
1374 } else if (strlencmp(cmd, "disable") == 0) {
1375 status = 0;
1376 } else if (strlencmp(cmd, "reset") == 0) {
1377 status = hotkey_orig_status;
1378 mask = hotkey_orig_mask;
1379 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1380 /* mask set */
1381 } else if (sscanf(cmd, "%x", &mask) == 1) {
1382 /* mask set */
1383 } else {
1384 res = -EINVAL;
1385 goto errexit;
1386 }
1387 do_cmd = 1;
1388 }
1389
1390 if (do_cmd)
1391 res = hotkey_set(status, mask);
1392
1393 errexit:
1394 mutex_unlock(&hotkey_mutex);
1395 return res;
1396 }
1397
1398 static const struct acpi_device_id ibm_htk_device_ids[] = {
1399 {IBM_HKEY_HID, 0},
1400 {"", 0},
1401 };
1402
1403 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1404 .hid = ibm_htk_device_ids,
1405 .notify = hotkey_notify,
1406 .handle = &hkey_handle,
1407 .type = ACPI_DEVICE_NOTIFY,
1408 };
1409
1410 static struct ibm_struct hotkey_driver_data = {
1411 .name = "hotkey",
1412 .read = hotkey_read,
1413 .write = hotkey_write,
1414 .exit = hotkey_exit,
1415 .resume = hotkey_resume,
1416 .acpi = &ibm_hotkey_acpidriver,
1417 };
1418
1419 /*************************************************************************
1420 * Bluetooth subdriver
1421 */
1422
1423 /* sysfs bluetooth enable ---------------------------------------------- */
1424 static ssize_t bluetooth_enable_show(struct device *dev,
1425 struct device_attribute *attr,
1426 char *buf)
1427 {
1428 int status;
1429
1430 status = bluetooth_get_radiosw();
1431 if (status < 0)
1432 return status;
1433
1434 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1435 }
1436
1437 static ssize_t bluetooth_enable_store(struct device *dev,
1438 struct device_attribute *attr,
1439 const char *buf, size_t count)
1440 {
1441 unsigned long t;
1442 int res;
1443
1444 if (parse_strtoul(buf, 1, &t))
1445 return -EINVAL;
1446
1447 res = bluetooth_set_radiosw(t);
1448
1449 return (res) ? res : count;
1450 }
1451
1452 static struct device_attribute dev_attr_bluetooth_enable =
1453 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1454 bluetooth_enable_show, bluetooth_enable_store);
1455
1456 /* --------------------------------------------------------------------- */
1457
1458 static struct attribute *bluetooth_attributes[] = {
1459 &dev_attr_bluetooth_enable.attr,
1460 NULL
1461 };
1462
1463 static const struct attribute_group bluetooth_attr_group = {
1464 .attrs = bluetooth_attributes,
1465 };
1466
1467 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1468 {
1469 int res;
1470 int status = 0;
1471
1472 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1473
1474 IBM_ACPIHANDLE_INIT(hkey);
1475
1476 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1477 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1478 tp_features.bluetooth = hkey_handle &&
1479 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1480
1481 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1482 str_supported(tp_features.bluetooth),
1483 status);
1484
1485 if (tp_features.bluetooth) {
1486 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1487 /* no bluetooth hardware present in system */
1488 tp_features.bluetooth = 0;
1489 dbg_printk(TPACPI_DBG_INIT,
1490 "bluetooth hardware not installed\n");
1491 } else {
1492 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1493 &bluetooth_attr_group);
1494 if (res)
1495 return res;
1496 }
1497 }
1498
1499 return (tp_features.bluetooth)? 0 : 1;
1500 }
1501
1502 static void bluetooth_exit(void)
1503 {
1504 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1505 &bluetooth_attr_group);
1506 }
1507
1508 static int bluetooth_get_radiosw(void)
1509 {
1510 int status;
1511
1512 if (!tp_features.bluetooth)
1513 return -ENODEV;
1514
1515 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1516 return -EIO;
1517
1518 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1519 }
1520
1521 static int bluetooth_set_radiosw(int radio_on)
1522 {
1523 int status;
1524
1525 if (!tp_features.bluetooth)
1526 return -ENODEV;
1527
1528 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1529 return -EIO;
1530 if (radio_on)
1531 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1532 else
1533 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1534 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1535 return -EIO;
1536
1537 return 0;
1538 }
1539
1540 /* procfs -------------------------------------------------------------- */
1541 static int bluetooth_read(char *p)
1542 {
1543 int len = 0;
1544 int status = bluetooth_get_radiosw();
1545
1546 if (!tp_features.bluetooth)
1547 len += sprintf(p + len, "status:\t\tnot supported\n");
1548 else {
1549 len += sprintf(p + len, "status:\t\t%s\n",
1550 (status)? "enabled" : "disabled");
1551 len += sprintf(p + len, "commands:\tenable, disable\n");
1552 }
1553
1554 return len;
1555 }
1556
1557 static int bluetooth_write(char *buf)
1558 {
1559 char *cmd;
1560
1561 if (!tp_features.bluetooth)
1562 return -ENODEV;
1563
1564 while ((cmd = next_cmd(&buf))) {
1565 if (strlencmp(cmd, "enable") == 0) {
1566 bluetooth_set_radiosw(1);
1567 } else if (strlencmp(cmd, "disable") == 0) {
1568 bluetooth_set_radiosw(0);
1569 } else
1570 return -EINVAL;
1571 }
1572
1573 return 0;
1574 }
1575
1576 static struct ibm_struct bluetooth_driver_data = {
1577 .name = "bluetooth",
1578 .read = bluetooth_read,
1579 .write = bluetooth_write,
1580 .exit = bluetooth_exit,
1581 };
1582
1583 /*************************************************************************
1584 * Wan subdriver
1585 */
1586
1587 /* sysfs wan enable ---------------------------------------------------- */
1588 static ssize_t wan_enable_show(struct device *dev,
1589 struct device_attribute *attr,
1590 char *buf)
1591 {
1592 int status;
1593
1594 status = wan_get_radiosw();
1595 if (status < 0)
1596 return status;
1597
1598 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1599 }
1600
1601 static ssize_t wan_enable_store(struct device *dev,
1602 struct device_attribute *attr,
1603 const char *buf, size_t count)
1604 {
1605 unsigned long t;
1606 int res;
1607
1608 if (parse_strtoul(buf, 1, &t))
1609 return -EINVAL;
1610
1611 res = wan_set_radiosw(t);
1612
1613 return (res) ? res : count;
1614 }
1615
1616 static struct device_attribute dev_attr_wan_enable =
1617 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1618 wan_enable_show, wan_enable_store);
1619
1620 /* --------------------------------------------------------------------- */
1621
1622 static struct attribute *wan_attributes[] = {
1623 &dev_attr_wan_enable.attr,
1624 NULL
1625 };
1626
1627 static const struct attribute_group wan_attr_group = {
1628 .attrs = wan_attributes,
1629 };
1630
1631 static int __init wan_init(struct ibm_init_struct *iibm)
1632 {
1633 int res;
1634 int status = 0;
1635
1636 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1637
1638 IBM_ACPIHANDLE_INIT(hkey);
1639
1640 tp_features.wan = hkey_handle &&
1641 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1642
1643 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1644 str_supported(tp_features.wan),
1645 status);
1646
1647 if (tp_features.wan) {
1648 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1649 /* no wan hardware present in system */
1650 tp_features.wan = 0;
1651 dbg_printk(TPACPI_DBG_INIT,
1652 "wan hardware not installed\n");
1653 } else {
1654 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1655 &wan_attr_group);
1656 if (res)
1657 return res;
1658 }
1659 }
1660
1661 return (tp_features.wan)? 0 : 1;
1662 }
1663
1664 static void wan_exit(void)
1665 {
1666 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1667 &wan_attr_group);
1668 }
1669
1670 static int wan_get_radiosw(void)
1671 {
1672 int status;
1673
1674 if (!tp_features.wan)
1675 return -ENODEV;
1676
1677 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1678 return -EIO;
1679
1680 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1681 }
1682
1683 static int wan_set_radiosw(int radio_on)
1684 {
1685 int status;
1686
1687 if (!tp_features.wan)
1688 return -ENODEV;
1689
1690 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1691 return -EIO;
1692 if (radio_on)
1693 status |= TP_ACPI_WANCARD_RADIOSSW;
1694 else
1695 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1696 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1697 return -EIO;
1698
1699 return 0;
1700 }
1701
1702 /* procfs -------------------------------------------------------------- */
1703 static int wan_read(char *p)
1704 {
1705 int len = 0;
1706 int status = wan_get_radiosw();
1707
1708 if (!tp_features.wan)
1709 len += sprintf(p + len, "status:\t\tnot supported\n");
1710 else {
1711 len += sprintf(p + len, "status:\t\t%s\n",
1712 (status)? "enabled" : "disabled");
1713 len += sprintf(p + len, "commands:\tenable, disable\n");
1714 }
1715
1716 return len;
1717 }
1718
1719 static int wan_write(char *buf)
1720 {
1721 char *cmd;
1722
1723 if (!tp_features.wan)
1724 return -ENODEV;
1725
1726 while ((cmd = next_cmd(&buf))) {
1727 if (strlencmp(cmd, "enable") == 0) {
1728 wan_set_radiosw(1);
1729 } else if (strlencmp(cmd, "disable") == 0) {
1730 wan_set_radiosw(0);
1731 } else
1732 return -EINVAL;
1733 }
1734
1735 return 0;
1736 }
1737
1738 static struct ibm_struct wan_driver_data = {
1739 .name = "wan",
1740 .read = wan_read,
1741 .write = wan_write,
1742 .exit = wan_exit,
1743 .flags.experimental = 1,
1744 };
1745
1746 /*************************************************************************
1747 * Video subdriver
1748 */
1749
1750 static enum video_access_mode video_supported;
1751 static int video_orig_autosw;
1752
1753 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1754 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1755 "\\_SB.PCI0.VID0", /* 770e */
1756 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1757 "\\_SB.PCI0.AGP.VID", /* all others */
1758 ); /* R30, R31 */
1759
1760 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1761
1762 static int __init video_init(struct ibm_init_struct *iibm)
1763 {
1764 int ivga;
1765
1766 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1767
1768 IBM_ACPIHANDLE_INIT(vid);
1769 IBM_ACPIHANDLE_INIT(vid2);
1770
1771 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1772 /* G41, assume IVGA doesn't change */
1773 vid_handle = vid2_handle;
1774
1775 if (!vid_handle)
1776 /* video switching not supported on R30, R31 */
1777 video_supported = TPACPI_VIDEO_NONE;
1778 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1779 /* 570 */
1780 video_supported = TPACPI_VIDEO_570;
1781 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1782 /* 600e/x, 770e, 770x */
1783 video_supported = TPACPI_VIDEO_770;
1784 else
1785 /* all others */
1786 video_supported = TPACPI_VIDEO_NEW;
1787
1788 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1789 str_supported(video_supported != TPACPI_VIDEO_NONE),
1790 video_supported);
1791
1792 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1793 }
1794
1795 static void video_exit(void)
1796 {
1797 dbg_printk(TPACPI_DBG_EXIT,
1798 "restoring original video autoswitch mode\n");
1799 if (video_autosw_set(video_orig_autosw))
1800 printk(IBM_ERR "error while trying to restore original "
1801 "video autoswitch mode\n");
1802 }
1803
1804 static int video_outputsw_get(void)
1805 {
1806 int status = 0;
1807 int i;
1808
1809 switch (video_supported) {
1810 case TPACPI_VIDEO_570:
1811 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1812 TP_ACPI_VIDEO_570_PHSCMD))
1813 return -EIO;
1814 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1815 break;
1816 case TPACPI_VIDEO_770:
1817 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1818 return -EIO;
1819 if (i)
1820 status |= TP_ACPI_VIDEO_S_LCD;
1821 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1822 return -EIO;
1823 if (i)
1824 status |= TP_ACPI_VIDEO_S_CRT;
1825 break;
1826 case TPACPI_VIDEO_NEW:
1827 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1828 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1829 return -EIO;
1830 if (i)
1831 status |= TP_ACPI_VIDEO_S_CRT;
1832
1833 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1834 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1835 return -EIO;
1836 if (i)
1837 status |= TP_ACPI_VIDEO_S_LCD;
1838 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1839 return -EIO;
1840 if (i)
1841 status |= TP_ACPI_VIDEO_S_DVI;
1842 break;
1843 default:
1844 return -ENOSYS;
1845 }
1846
1847 return status;
1848 }
1849
1850 static int video_outputsw_set(int status)
1851 {
1852 int autosw;
1853 int res = 0;
1854
1855 switch (video_supported) {
1856 case TPACPI_VIDEO_570:
1857 res = acpi_evalf(NULL, NULL,
1858 "\\_SB.PHS2", "vdd",
1859 TP_ACPI_VIDEO_570_PHS2CMD,
1860 status | TP_ACPI_VIDEO_570_PHS2SET);
1861 break;
1862 case TPACPI_VIDEO_770:
1863 autosw = video_autosw_get();
1864 if (autosw < 0)
1865 return autosw;
1866
1867 res = video_autosw_set(1);
1868 if (res)
1869 return res;
1870 res = acpi_evalf(vid_handle, NULL,
1871 "ASWT", "vdd", status * 0x100, 0);
1872 if (!autosw && video_autosw_set(autosw)) {
1873 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1874 return -EIO;
1875 }
1876 break;
1877 case TPACPI_VIDEO_NEW:
1878 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1879 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1880 break;
1881 default:
1882 return -ENOSYS;
1883 }
1884
1885 return (res)? 0 : -EIO;
1886 }
1887
1888 static int video_autosw_get(void)
1889 {
1890 int autosw = 0;
1891
1892 switch (video_supported) {
1893 case TPACPI_VIDEO_570:
1894 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1895 return -EIO;
1896 break;
1897 case TPACPI_VIDEO_770:
1898 case TPACPI_VIDEO_NEW:
1899 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1900 return -EIO;
1901 break;
1902 default:
1903 return -ENOSYS;
1904 }
1905
1906 return autosw & 1;
1907 }
1908
1909 static int video_autosw_set(int enable)
1910 {
1911 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1912 return -EIO;
1913 return 0;
1914 }
1915
1916 static int video_outputsw_cycle(void)
1917 {
1918 int autosw = video_autosw_get();
1919 int res;
1920
1921 if (autosw < 0)
1922 return autosw;
1923
1924 switch (video_supported) {
1925 case TPACPI_VIDEO_570:
1926 res = video_autosw_set(1);
1927 if (res)
1928 return res;
1929 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1930 break;
1931 case TPACPI_VIDEO_770:
1932 case TPACPI_VIDEO_NEW:
1933 res = video_autosw_set(1);
1934 if (res)
1935 return res;
1936 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1937 break;
1938 default:
1939 return -ENOSYS;
1940 }
1941 if (!autosw && video_autosw_set(autosw)) {
1942 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1943 return -EIO;
1944 }
1945
1946 return (res)? 0 : -EIO;
1947 }
1948
1949 static int video_expand_toggle(void)
1950 {
1951 switch (video_supported) {
1952 case TPACPI_VIDEO_570:
1953 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1954 0 : -EIO;
1955 case TPACPI_VIDEO_770:
1956 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1957 0 : -EIO;
1958 case TPACPI_VIDEO_NEW:
1959 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1960 0 : -EIO;
1961 default:
1962 return -ENOSYS;
1963 }
1964 /* not reached */
1965 }
1966
1967 static int video_read(char *p)
1968 {
1969 int status, autosw;
1970 int len = 0;
1971
1972 if (video_supported == TPACPI_VIDEO_NONE) {
1973 len += sprintf(p + len, "status:\t\tnot supported\n");
1974 return len;
1975 }
1976
1977 status = video_outputsw_get();
1978 if (status < 0)
1979 return status;
1980
1981 autosw = video_autosw_get();
1982 if (autosw < 0)
1983 return autosw;
1984
1985 len += sprintf(p + len, "status:\t\tsupported\n");
1986 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1987 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1988 if (video_supported == TPACPI_VIDEO_NEW)
1989 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1990 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1991 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1992 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1993 if (video_supported == TPACPI_VIDEO_NEW)
1994 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1995 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1996 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1997
1998 return len;
1999 }
2000
2001 static int video_write(char *buf)
2002 {
2003 char *cmd;
2004 int enable, disable, status;
2005 int res;
2006
2007 if (video_supported == TPACPI_VIDEO_NONE)
2008 return -ENODEV;
2009
2010 enable = 0;
2011 disable = 0;
2012
2013 while ((cmd = next_cmd(&buf))) {
2014 if (strlencmp(cmd, "lcd_enable") == 0) {
2015 enable |= TP_ACPI_VIDEO_S_LCD;
2016 } else if (strlencmp(cmd, "lcd_disable") == 0) {
2017 disable |= TP_ACPI_VIDEO_S_LCD;
2018 } else if (strlencmp(cmd, "crt_enable") == 0) {
2019 enable |= TP_ACPI_VIDEO_S_CRT;
2020 } else if (strlencmp(cmd, "crt_disable") == 0) {
2021 disable |= TP_ACPI_VIDEO_S_CRT;
2022 } else if (video_supported == TPACPI_VIDEO_NEW &&
2023 strlencmp(cmd, "dvi_enable") == 0) {
2024 enable |= TP_ACPI_VIDEO_S_DVI;
2025 } else if (video_supported == TPACPI_VIDEO_NEW &&
2026 strlencmp(cmd, "dvi_disable") == 0) {
2027 disable |= TP_ACPI_VIDEO_S_DVI;
2028 } else if (strlencmp(cmd, "auto_enable") == 0) {
2029 res = video_autosw_set(1);
2030 if (res)
2031 return res;
2032 } else if (strlencmp(cmd, "auto_disable") == 0) {
2033 res = video_autosw_set(0);
2034 if (res)
2035 return res;
2036 } else if (strlencmp(cmd, "video_switch") == 0) {
2037 res = video_outputsw_cycle();
2038 if (res)
2039 return res;
2040 } else if (strlencmp(cmd, "expand_toggle") == 0) {
2041 res = video_expand_toggle();
2042 if (res)
2043 return res;
2044 } else
2045 return -EINVAL;
2046 }
2047
2048 if (enable || disable) {
2049 status = video_outputsw_get();
2050 if (status < 0)
2051 return status;
2052 res = video_outputsw_set((status & ~disable) | enable);
2053 if (res)
2054 return res;
2055 }
2056
2057 return 0;
2058 }
2059
2060 static struct ibm_struct video_driver_data = {
2061 .name = "video",
2062 .read = video_read,
2063 .write = video_write,
2064 .exit = video_exit,
2065 };
2066
2067 /*************************************************************************
2068 * Light (thinklight) subdriver
2069 */
2070
2071 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
2072 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
2073
2074 static int __init light_init(struct ibm_init_struct *iibm)
2075 {
2076 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
2077
2078 IBM_ACPIHANDLE_INIT(ledb);
2079 IBM_ACPIHANDLE_INIT(lght);
2080 IBM_ACPIHANDLE_INIT(cmos);
2081
2082 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
2083 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
2084
2085 if (tp_features.light)
2086 /* light status not supported on
2087 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
2088 tp_features.light_status =
2089 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
2090
2091 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
2092 str_supported(tp_features.light));
2093
2094 return (tp_features.light)? 0 : 1;
2095 }
2096
2097 static int light_read(char *p)
2098 {
2099 int len = 0;
2100 int status = 0;
2101
2102 if (!tp_features.light) {
2103 len += sprintf(p + len, "status:\t\tnot supported\n");
2104 } else if (!tp_features.light_status) {
2105 len += sprintf(p + len, "status:\t\tunknown\n");
2106 len += sprintf(p + len, "commands:\ton, off\n");
2107 } else {
2108 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
2109 return -EIO;
2110 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
2111 len += sprintf(p + len, "commands:\ton, off\n");
2112 }
2113
2114 return len;
2115 }
2116
2117 static int light_write(char *buf)
2118 {
2119 int cmos_cmd, lght_cmd;
2120 char *cmd;
2121 int success;
2122
2123 if (!tp_features.light)
2124 return -ENODEV;
2125
2126 while ((cmd = next_cmd(&buf))) {
2127 if (strlencmp(cmd, "on") == 0) {
2128 cmos_cmd = 0x0c;
2129 lght_cmd = 1;
2130 } else if (strlencmp(cmd, "off") == 0) {
2131 cmos_cmd = 0x0d;
2132 lght_cmd = 0;
2133 } else
2134 return -EINVAL;
2135
2136 success = cmos_handle ?
2137 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2138 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2139 if (!success)
2140 return -EIO;
2141 }
2142
2143 return 0;
2144 }
2145
2146 static struct ibm_struct light_driver_data = {
2147 .name = "light",
2148 .read = light_read,
2149 .write = light_write,
2150 };
2151
2152 /*************************************************************************
2153 * Dock subdriver
2154 */
2155
2156 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2157
2158 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
2159 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2160 "\\_SB.PCI0.PCI1.DOCK", /* all others */
2161 "\\_SB.PCI.ISA.SLCE", /* 570 */
2162 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2163
2164 /* don't list other alternatives as we install a notify handler on the 570 */
2165 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
2166
2167 static const struct acpi_device_id ibm_pci_device_ids[] = {
2168 {PCI_ROOT_HID_STRING, 0},
2169 {"", 0},
2170 };
2171
2172 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2173 {
2174 .notify = dock_notify,
2175 .handle = &dock_handle,
2176 .type = ACPI_SYSTEM_NOTIFY,
2177 },
2178 {
2179 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2180 * We just use it to get notifications of dock hotplug
2181 * in very old thinkpads */
2182 .hid = ibm_pci_device_ids,
2183 .notify = dock_notify,
2184 .handle = &pci_handle,
2185 .type = ACPI_SYSTEM_NOTIFY,
2186 },
2187 };
2188
2189 static struct ibm_struct dock_driver_data[2] = {
2190 {
2191 .name = "dock",
2192 .read = dock_read,
2193 .write = dock_write,
2194 .acpi = &ibm_dock_acpidriver[0],
2195 },
2196 {
2197 .name = "dock",
2198 .acpi = &ibm_dock_acpidriver[1],
2199 },
2200 };
2201
2202 #define dock_docked() (_sta(dock_handle) & 1)
2203
2204 static int __init dock_init(struct ibm_init_struct *iibm)
2205 {
2206 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2207
2208 IBM_ACPIHANDLE_INIT(dock);
2209
2210 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2211 str_supported(dock_handle != NULL));
2212
2213 return (dock_handle)? 0 : 1;
2214 }
2215
2216 static int __init dock_init2(struct ibm_init_struct *iibm)
2217 {
2218 int dock2_needed;
2219
2220 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2221
2222 if (dock_driver_data[0].flags.acpi_driver_registered &&
2223 dock_driver_data[0].flags.acpi_notify_installed) {
2224 IBM_ACPIHANDLE_INIT(pci);
2225 dock2_needed = (pci_handle != NULL);
2226 vdbg_printk(TPACPI_DBG_INIT,
2227 "dock PCI handler for the TP 570 is %s\n",
2228 str_supported(dock2_needed));
2229 } else {
2230 vdbg_printk(TPACPI_DBG_INIT,
2231 "dock subdriver part 2 not required\n");
2232 dock2_needed = 0;
2233 }
2234
2235 return (dock2_needed)? 0 : 1;
2236 }
2237
2238 static void dock_notify(struct ibm_struct *ibm, u32 event)
2239 {
2240 int docked = dock_docked();
2241 int pci = ibm->acpi->hid && ibm->acpi->device &&
2242 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
2243 int data;
2244
2245 if (event == 1 && !pci) /* 570 */
2246 data = 1; /* button */
2247 else if (event == 1 && pci) /* 570 */
2248 data = 3; /* dock */
2249 else if (event == 3 && docked)
2250 data = 1; /* button */
2251 else if (event == 3 && !docked)
2252 data = 2; /* undock */
2253 else if (event == 0 && docked)
2254 data = 3; /* dock */
2255 else {
2256 printk(IBM_ERR "unknown dock event %d, status %d\n",
2257 event, _sta(dock_handle));
2258 data = 0; /* unknown */
2259 }
2260 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
2261 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2262 ibm->acpi->device->dev.bus_id,
2263 event, data);
2264 }
2265
2266 static int dock_read(char *p)
2267 {
2268 int len = 0;
2269 int docked = dock_docked();
2270
2271 if (!dock_handle)
2272 len += sprintf(p + len, "status:\t\tnot supported\n");
2273 else if (!docked)
2274 len += sprintf(p + len, "status:\t\tundocked\n");
2275 else {
2276 len += sprintf(p + len, "status:\t\tdocked\n");
2277 len += sprintf(p + len, "commands:\tdock, undock\n");
2278 }
2279
2280 return len;
2281 }
2282
2283 static int dock_write(char *buf)
2284 {
2285 char *cmd;
2286
2287 if (!dock_docked())
2288 return -ENODEV;
2289
2290 while ((cmd = next_cmd(&buf))) {
2291 if (strlencmp(cmd, "undock") == 0) {
2292 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2293 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2294 return -EIO;
2295 } else if (strlencmp(cmd, "dock") == 0) {
2296 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2297 return -EIO;
2298 } else
2299 return -EINVAL;
2300 }
2301
2302 return 0;
2303 }
2304
2305 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2306
2307 /*************************************************************************
2308 * Bay subdriver
2309 */
2310
2311 #ifdef CONFIG_THINKPAD_ACPI_BAY
2312 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
2313 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2314 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2315 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2316 ); /* A21e, R30, R31 */
2317 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2318 "_EJ0", /* all others */
2319 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2320 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
2321 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2322 ); /* all others */
2323 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
2324 "_EJ0", /* 770x */
2325 ); /* all others */
2326
2327 static int __init bay_init(struct ibm_init_struct *iibm)
2328 {
2329 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2330
2331 IBM_ACPIHANDLE_INIT(bay);
2332 if (bay_handle)
2333 IBM_ACPIHANDLE_INIT(bay_ej);
2334 IBM_ACPIHANDLE_INIT(bay2);
2335 if (bay2_handle)
2336 IBM_ACPIHANDLE_INIT(bay2_ej);
2337
2338 tp_features.bay_status = bay_handle &&
2339 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2340 tp_features.bay_status2 = bay2_handle &&
2341 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2342
2343 tp_features.bay_eject = bay_handle && bay_ej_handle &&
2344 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2345 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2346 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2347
2348 vdbg_printk(TPACPI_DBG_INIT,
2349 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2350 str_supported(tp_features.bay_status),
2351 str_supported(tp_features.bay_eject),
2352 str_supported(tp_features.bay_status2),
2353 str_supported(tp_features.bay_eject2));
2354
2355 return (tp_features.bay_status || tp_features.bay_eject ||
2356 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2357 }
2358
2359 static void bay_notify(struct ibm_struct *ibm, u32 event)
2360 {
2361 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
2362 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2363 ibm->acpi->device->dev.bus_id,
2364 event, 0);
2365 }
2366
2367 #define bay_occupied(b) (_sta(b##_handle) & 1)
2368
2369 static int bay_read(char *p)
2370 {
2371 int len = 0;
2372 int occupied = bay_occupied(bay);
2373 int occupied2 = bay_occupied(bay2);
2374 int eject, eject2;
2375
2376 len += sprintf(p + len, "status:\t\t%s\n",
2377 tp_features.bay_status ?
2378 (occupied ? "occupied" : "unoccupied") :
2379 "not supported");
2380 if (tp_features.bay_status2)
2381 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2382 "occupied" : "unoccupied");
2383
2384 eject = tp_features.bay_eject && occupied;
2385 eject2 = tp_features.bay_eject2 && occupied2;
2386
2387 if (eject && eject2)
2388 len += sprintf(p + len, "commands:\teject, eject2\n");
2389 else if (eject)
2390 len += sprintf(p + len, "commands:\teject\n");
2391 else if (eject2)
2392 len += sprintf(p + len, "commands:\teject2\n");
2393
2394 return len;
2395 }
2396
2397 static int bay_write(char *buf)
2398 {
2399 char *cmd;
2400
2401 if (!tp_features.bay_eject && !tp_features.bay_eject2)
2402 return -ENODEV;
2403
2404 while ((cmd = next_cmd(&buf))) {
2405 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2406 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2407 return -EIO;
2408 } else if (tp_features.bay_eject2 &&
2409 strlencmp(cmd, "eject2") == 0) {
2410 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2411 return -EIO;
2412 } else
2413 return -EINVAL;
2414 }
2415
2416 return 0;
2417 }
2418
2419 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2420 .notify = bay_notify,
2421 .handle = &bay_handle,
2422 .type = ACPI_SYSTEM_NOTIFY,
2423 };
2424
2425 static struct ibm_struct bay_driver_data = {
2426 .name = "bay",
2427 .read = bay_read,
2428 .write = bay_write,
2429 .acpi = &ibm_bay_acpidriver,
2430 };
2431
2432 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2433
2434 /*************************************************************************
2435 * CMOS subdriver
2436 */
2437
2438 /* sysfs cmos_command -------------------------------------------------- */
2439 static ssize_t cmos_command_store(struct device *dev,
2440 struct device_attribute *attr,
2441 const char *buf, size_t count)
2442 {
2443 unsigned long cmos_cmd;
2444 int res;
2445
2446 if (parse_strtoul(buf, 21, &cmos_cmd))
2447 return -EINVAL;
2448
2449 res = issue_thinkpad_cmos_command(cmos_cmd);
2450 return (res)? res : count;
2451 }
2452
2453 static struct device_attribute dev_attr_cmos_command =
2454 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2455
2456 /* --------------------------------------------------------------------- */
2457
2458 static int __init cmos_init(struct ibm_init_struct *iibm)
2459 {
2460 int res;
2461
2462 vdbg_printk(TPACPI_DBG_INIT,
2463 "initializing cmos commands subdriver\n");
2464
2465 IBM_ACPIHANDLE_INIT(cmos);
2466
2467 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2468 str_supported(cmos_handle != NULL));
2469
2470 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2471 if (res)
2472 return res;
2473
2474 return (cmos_handle)? 0 : 1;
2475 }
2476
2477 static void cmos_exit(void)
2478 {
2479 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2480 }
2481
2482 static int cmos_read(char *p)
2483 {
2484 int len = 0;
2485
2486 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2487 R30, R31, T20-22, X20-21 */
2488 if (!cmos_handle)
2489 len += sprintf(p + len, "status:\t\tnot supported\n");
2490 else {
2491 len += sprintf(p + len, "status:\t\tsupported\n");
2492 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2493 }
2494
2495 return len;
2496 }
2497
2498 static int cmos_write(char *buf)
2499 {
2500 char *cmd;
2501 int cmos_cmd, res;
2502
2503 while ((cmd = next_cmd(&buf))) {
2504 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2505 cmos_cmd >= 0 && cmos_cmd <= 21) {
2506 /* cmos_cmd set */
2507 } else
2508 return -EINVAL;
2509
2510 res = issue_thinkpad_cmos_command(cmos_cmd);
2511 if (res)
2512 return res;
2513 }
2514
2515 return 0;
2516 }
2517
2518 static struct ibm_struct cmos_driver_data = {
2519 .name = "cmos",
2520 .read = cmos_read,
2521 .write = cmos_write,
2522 .exit = cmos_exit,
2523 };
2524
2525 /*************************************************************************
2526 * LED subdriver
2527 */
2528
2529 static enum led_access_mode led_supported;
2530
2531 IBM_HANDLE(led, ec, "SLED", /* 570 */
2532 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2533 "LED", /* all others */
2534 ); /* R30, R31 */
2535
2536 static int __init led_init(struct ibm_init_struct *iibm)
2537 {
2538 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2539
2540 IBM_ACPIHANDLE_INIT(led);
2541
2542 if (!led_handle)
2543 /* led not supported on R30, R31 */
2544 led_supported = TPACPI_LED_NONE;
2545 else if (strlencmp(led_path, "SLED") == 0)
2546 /* 570 */
2547 led_supported = TPACPI_LED_570;
2548 else if (strlencmp(led_path, "SYSL") == 0)
2549 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2550 led_supported = TPACPI_LED_OLD;
2551 else
2552 /* all others */
2553 led_supported = TPACPI_LED_NEW;
2554
2555 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2556 str_supported(led_supported), led_supported);
2557
2558 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2559 }
2560
2561 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2562
2563 static int led_read(char *p)
2564 {
2565 int len = 0;
2566
2567 if (!led_supported) {
2568 len += sprintf(p + len, "status:\t\tnot supported\n");
2569 return len;
2570 }
2571 len += sprintf(p + len, "status:\t\tsupported\n");
2572
2573 if (led_supported == TPACPI_LED_570) {
2574 /* 570 */
2575 int i, status;
2576 for (i = 0; i < 8; i++) {
2577 if (!acpi_evalf(ec_handle,
2578 &status, "GLED", "dd", 1 << i))
2579 return -EIO;
2580 len += sprintf(p + len, "%d:\t\t%s\n",
2581 i, led_status(status));
2582 }
2583 }
2584
2585 len += sprintf(p + len, "commands:\t"
2586 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2587
2588 return len;
2589 }
2590
2591 /* off, on, blink */
2592 static const int led_sled_arg1[] = { 0, 1, 3 };
2593 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
2594 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
2595 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2596
2597 static int led_write(char *buf)
2598 {
2599 char *cmd;
2600 int led, ind, ret;
2601
2602 if (!led_supported)
2603 return -ENODEV;
2604
2605 while ((cmd = next_cmd(&buf))) {
2606 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2607 return -EINVAL;
2608
2609 if (strstr(cmd, "off")) {
2610 ind = 0;
2611 } else if (strstr(cmd, "on")) {
2612 ind = 1;
2613 } else if (strstr(cmd, "blink")) {
2614 ind = 2;
2615 } else
2616 return -EINVAL;
2617
2618 if (led_supported == TPACPI_LED_570) {
2619 /* 570 */
2620 led = 1 << led;
2621 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2622 led, led_sled_arg1[ind]))
2623 return -EIO;
2624 } else if (led_supported == TPACPI_LED_OLD) {
2625 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2626 led = 1 << led;
2627 ret = ec_write(TPACPI_LED_EC_HLMS, led);
2628 if (ret >= 0)
2629 ret =
2630 ec_write(TPACPI_LED_EC_HLBL,
2631 led * led_exp_hlbl[ind]);
2632 if (ret >= 0)
2633 ret =
2634 ec_write(TPACPI_LED_EC_HLCL,
2635 led * led_exp_hlcl[ind]);
2636 if (ret < 0)
2637 return ret;
2638 } else {
2639 /* all others */
2640 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2641 led, led_led_arg1[ind]))
2642 return -EIO;
2643 }
2644 }
2645
2646 return 0;
2647 }
2648
2649 static struct ibm_struct led_driver_data = {
2650 .name = "led",
2651 .read = led_read,
2652 .write = led_write,
2653 };
2654
2655 /*************************************************************************
2656 * Beep subdriver
2657 */
2658
2659 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
2660
2661 static int __init beep_init(struct ibm_init_struct *iibm)
2662 {
2663 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2664
2665 IBM_ACPIHANDLE_INIT(beep);
2666
2667 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2668 str_supported(beep_handle != NULL));
2669
2670 return (beep_handle)? 0 : 1;
2671 }
2672
2673 static int beep_read(char *p)
2674 {
2675 int len = 0;
2676
2677 if (!beep_handle)
2678 len += sprintf(p + len, "status:\t\tnot supported\n");
2679 else {
2680 len += sprintf(p + len, "status:\t\tsupported\n");
2681 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2682 }
2683
2684 return len;
2685 }
2686
2687 static int beep_write(char *buf)
2688 {
2689 char *cmd;
2690 int beep_cmd;
2691
2692 if (!beep_handle)
2693 return -ENODEV;
2694
2695 while ((cmd = next_cmd(&buf))) {
2696 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2697 beep_cmd >= 0 && beep_cmd <= 17) {
2698 /* beep_cmd set */
2699 } else
2700 return -EINVAL;
2701 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2702 return -EIO;
2703 }
2704
2705 return 0;
2706 }
2707
2708 static struct ibm_struct beep_driver_data = {
2709 .name = "beep",
2710 .read = beep_read,
2711 .write = beep_write,
2712 };
2713
2714 /*************************************************************************
2715 * Thermal subdriver
2716 */
2717
2718 static enum thermal_access_mode thermal_read_mode;
2719
2720 /* sysfs temp##_input -------------------------------------------------- */
2721
2722 static ssize_t thermal_temp_input_show(struct device *dev,
2723 struct device_attribute *attr,
2724 char *buf)
2725 {
2726 struct sensor_device_attribute *sensor_attr =
2727 to_sensor_dev_attr(attr);
2728 int idx = sensor_attr->index;
2729 s32 value;
2730 int res;
2731
2732 res = thermal_get_sensor(idx, &value);
2733 if (res)
2734 return res;
2735 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2736 return -ENXIO;
2737
2738 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2739 }
2740
2741 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2742 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2743
2744 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2745 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2746 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2747 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2748 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2749 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2750 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2751 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2752 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2753 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2754 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2755 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2756 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2757 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2758 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2759 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2760 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2761 };
2762
2763 #define THERMAL_ATTRS(X) \
2764 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2765
2766 static struct attribute *thermal_temp_input_attr[] = {
2767 THERMAL_ATTRS(8),
2768 THERMAL_ATTRS(9),
2769 THERMAL_ATTRS(10),
2770 THERMAL_ATTRS(11),
2771 THERMAL_ATTRS(12),
2772 THERMAL_ATTRS(13),
2773 THERMAL_ATTRS(14),
2774 THERMAL_ATTRS(15),
2775 THERMAL_ATTRS(0),
2776 THERMAL_ATTRS(1),
2777 THERMAL_ATTRS(2),
2778 THERMAL_ATTRS(3),
2779 THERMAL_ATTRS(4),
2780 THERMAL_ATTRS(5),
2781 THERMAL_ATTRS(6),
2782 THERMAL_ATTRS(7),
2783 NULL
2784 };
2785
2786 static const struct attribute_group thermal_temp_input16_group = {
2787 .attrs = thermal_temp_input_attr
2788 };
2789
2790 static const struct attribute_group thermal_temp_input8_group = {
2791 .attrs = &thermal_temp_input_attr[8]
2792 };
2793
2794 #undef THERMAL_SENSOR_ATTR_TEMP
2795 #undef THERMAL_ATTRS
2796
2797 /* --------------------------------------------------------------------- */
2798
2799 static int __init thermal_init(struct ibm_init_struct *iibm)
2800 {
2801 u8 t, ta1, ta2;
2802 int i;
2803 int acpi_tmp7;
2804 int res;
2805
2806 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2807
2808 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2809
2810 if (thinkpad_id.ec_model) {
2811 /*
2812 * Direct EC access mode: sensors at registers
2813 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2814 * non-implemented, thermal sensors return 0x80 when
2815 * not available
2816 */
2817
2818 ta1 = ta2 = 0;
2819 for (i = 0; i < 8; i++) {
2820 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2821 ta1 |= t;
2822 } else {
2823 ta1 = 0;
2824 break;
2825 }
2826 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2827 ta2 |= t;
2828 } else {
2829 ta1 = 0;
2830 break;
2831 }
2832 }
2833 if (ta1 == 0) {
2834 /* This is sheer paranoia, but we handle it anyway */
2835 if (acpi_tmp7) {
2836 printk(IBM_ERR
2837 "ThinkPad ACPI EC access misbehaving, "
2838 "falling back to ACPI TMPx access mode\n");
2839 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2840 } else {
2841 printk(IBM_ERR
2842 "ThinkPad ACPI EC access misbehaving, "
2843 "disabling thermal sensors access\n");
2844 thermal_read_mode = TPACPI_THERMAL_NONE;
2845 }
2846 } else {
2847 thermal_read_mode =
2848 (ta2 != 0) ?
2849 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2850 }
2851 } else if (acpi_tmp7) {
2852 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2853 /* 600e/x, 770e, 770x */
2854 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2855 } else {
2856 /* Standard ACPI TMPx access, max 8 sensors */
2857 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2858 }
2859 } else {
2860 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2861 thermal_read_mode = TPACPI_THERMAL_NONE;
2862 }
2863
2864 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2865 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2866 thermal_read_mode);
2867
2868 switch(thermal_read_mode) {
2869 case TPACPI_THERMAL_TPEC_16:
2870 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2871 &thermal_temp_input16_group);
2872 if (res)
2873 return res;
2874 break;
2875 case TPACPI_THERMAL_TPEC_8:
2876 case TPACPI_THERMAL_ACPI_TMP07:
2877 case TPACPI_THERMAL_ACPI_UPDT:
2878 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2879 &thermal_temp_input8_group);
2880 if (res)
2881 return res;
2882 break;
2883 case TPACPI_THERMAL_NONE:
2884 default:
2885 return 1;
2886 }
2887
2888 return 0;
2889 }
2890
2891 static void thermal_exit(void)
2892 {
2893 switch(thermal_read_mode) {
2894 case TPACPI_THERMAL_TPEC_16:
2895 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2896 &thermal_temp_input16_group);
2897 break;
2898 case TPACPI_THERMAL_TPEC_8:
2899 case TPACPI_THERMAL_ACPI_TMP07:
2900 case TPACPI_THERMAL_ACPI_UPDT:
2901 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2902 &thermal_temp_input16_group);
2903 break;
2904 case TPACPI_THERMAL_NONE:
2905 default:
2906 break;
2907 }
2908 }
2909
2910 /* idx is zero-based */
2911 static int thermal_get_sensor(int idx, s32 *value)
2912 {
2913 int t;
2914 s8 tmp;
2915 char tmpi[5];
2916
2917 t = TP_EC_THERMAL_TMP0;
2918
2919 switch (thermal_read_mode) {
2920 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2921 case TPACPI_THERMAL_TPEC_16:
2922 if (idx >= 8 && idx <= 15) {
2923 t = TP_EC_THERMAL_TMP8;
2924 idx -= 8;
2925 }
2926 /* fallthrough */
2927 #endif
2928 case TPACPI_THERMAL_TPEC_8:
2929 if (idx <= 7) {
2930 if (!acpi_ec_read(t + idx, &tmp))
2931 return -EIO;
2932 *value = tmp * 1000;
2933 return 0;
2934 }
2935 break;
2936
2937 case TPACPI_THERMAL_ACPI_UPDT:
2938 if (idx <= 7) {
2939 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2940 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2941 return -EIO;
2942 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2943 return -EIO;
2944 *value = (t - 2732) * 100;
2945 return 0;
2946 }
2947 break;
2948
2949 case TPACPI_THERMAL_ACPI_TMP07:
2950 if (idx <= 7) {
2951 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2952 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2953 return -EIO;
2954 if (t > 127 || t < -127)
2955 t = TP_EC_THERMAL_TMP_NA;
2956 *value = t * 1000;
2957 return 0;
2958 }
2959 break;
2960
2961 case TPACPI_THERMAL_NONE:
2962 default:
2963 return -ENOSYS;
2964 }
2965
2966 return -EINVAL;
2967 }
2968
2969 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2970 {
2971 int res, i;
2972 int n;
2973
2974 n = 8;
2975 i = 0;
2976
2977 if (!s)
2978 return -EINVAL;
2979
2980 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2981 n = 16;
2982
2983 for(i = 0 ; i < n; i++) {
2984 res = thermal_get_sensor(i, &s->temp[i]);
2985 if (res)
2986 return res;
2987 }
2988
2989 return n;
2990 }
2991
2992 static int thermal_read(char *p)
2993 {
2994 int len = 0;
2995 int n, i;
2996 struct ibm_thermal_sensors_struct t;
2997
2998 n = thermal_get_sensors(&t);
2999 if (unlikely(n < 0))
3000 return n;
3001
3002 len += sprintf(p + len, "temperatures:\t");
3003
3004 if (n > 0) {
3005 for (i = 0; i < (n - 1); i++)
3006 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
3007 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
3008 } else
3009 len += sprintf(p + len, "not supported\n");
3010
3011 return len;
3012 }
3013
3014 static struct ibm_struct thermal_driver_data = {
3015 .name = "thermal",
3016 .read = thermal_read,
3017 .exit = thermal_exit,
3018 };
3019
3020 /*************************************************************************
3021 * EC Dump subdriver
3022 */
3023
3024 static u8 ecdump_regs[256];
3025
3026 static int ecdump_read(char *p)
3027 {
3028 int len = 0;
3029 int i, j;
3030 u8 v;
3031
3032 len += sprintf(p + len, "EC "
3033 " +00 +01 +02 +03 +04 +05 +06 +07"
3034 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
3035 for (i = 0; i < 256; i += 16) {
3036 len += sprintf(p + len, "EC 0x%02x:", i);
3037 for (j = 0; j < 16; j++) {
3038 if (!acpi_ec_read(i + j, &v))
3039 break;
3040 if (v != ecdump_regs[i + j])
3041 len += sprintf(p + len, " *%02x", v);
3042 else
3043 len += sprintf(p + len, " %02x", v);
3044 ecdump_regs[i + j] = v;
3045 }
3046 len += sprintf(p + len, "\n");
3047 if (j != 16)
3048 break;
3049 }
3050
3051 /* These are way too dangerous to advertise openly... */
3052 #if 0
3053 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
3054 " (<offset> is 00-ff, <value> is 00-ff)\n");
3055 len += sprintf(p + len, "commands:\t0x<offset> <value> "
3056 " (<offset> is 00-ff, <value> is 0-255)\n");
3057 #endif
3058 return len;
3059 }
3060
3061 static int ecdump_write(char *buf)
3062 {
3063 char *cmd;
3064 int i, v;
3065
3066 while ((cmd = next_cmd(&buf))) {
3067 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
3068 /* i and v set */
3069 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
3070 /* i and v set */
3071 } else
3072 return -EINVAL;
3073 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
3074 if (!acpi_ec_write(i, v))
3075 return -EIO;
3076 } else
3077 return -EINVAL;
3078 }
3079
3080 return 0;
3081 }
3082
3083 static struct ibm_struct ecdump_driver_data = {
3084 .name = "ecdump",
3085 .read = ecdump_read,
3086 .write = ecdump_write,
3087 .flags.experimental = 1,
3088 };
3089
3090 /*************************************************************************
3091 * Backlight/brightness subdriver
3092 */
3093
3094 static struct backlight_device *ibm_backlight_device;
3095
3096 static struct backlight_ops ibm_backlight_data = {
3097 .get_brightness = brightness_get,
3098 .update_status = brightness_update_status,
3099 };
3100
3101 static struct mutex brightness_mutex;
3102
3103 static int __init brightness_init(struct ibm_init_struct *iibm)
3104 {
3105 int b;
3106
3107 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3108
3109 mutex_init(&brightness_mutex);
3110
3111 if (!brightness_mode) {
3112 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3113 brightness_mode = 2;
3114 else
3115 brightness_mode = 3;
3116
3117 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3118 brightness_mode);
3119 }
3120
3121 if (brightness_mode > 3)
3122 return -EINVAL;
3123
3124 b = brightness_get(NULL);
3125 if (b < 0)
3126 return 1;
3127
3128 ibm_backlight_device = backlight_device_register(
3129 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3130 &ibm_backlight_data);
3131 if (IS_ERR(ibm_backlight_device)) {
3132 printk(IBM_ERR "Could not register backlight device\n");
3133 return PTR_ERR(ibm_backlight_device);
3134 }
3135 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3136
3137 ibm_backlight_device->props.max_brightness = 7;
3138 ibm_backlight_device->props.brightness = b;
3139 backlight_update_status(ibm_backlight_device);
3140
3141 return 0;
3142 }
3143
3144 static void brightness_exit(void)
3145 {
3146 if (ibm_backlight_device) {
3147 vdbg_printk(TPACPI_DBG_EXIT,
3148 "calling backlight_device_unregister()\n");
3149 backlight_device_unregister(ibm_backlight_device);
3150 ibm_backlight_device = NULL;
3151 }
3152 }
3153
3154 static int brightness_update_status(struct backlight_device *bd)
3155 {
3156 return brightness_set(
3157 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3158 bd->props.power == FB_BLANK_UNBLANK) ?
3159 bd->props.brightness : 0);
3160 }
3161
3162 /*
3163 * ThinkPads can read brightness from two places: EC 0x31, or
3164 * CMOS NVRAM byte 0x5E, bits 0-3.
3165 */
3166 static int brightness_get(struct backlight_device *bd)
3167 {
3168 u8 lec = 0, lcmos = 0, level = 0;
3169
3170 if (brightness_mode & 1) {
3171 if (!acpi_ec_read(brightness_offset, &lec))
3172 return -EIO;
3173 lec &= 7;
3174 level = lec;
3175 };
3176 if (brightness_mode & 2) {
3177 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3178 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3179 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3180 level = lcmos;
3181 }
3182
3183 if (brightness_mode == 3 && lec != lcmos) {
3184 printk(IBM_ERR
3185 "CMOS NVRAM (%u) and EC (%u) do not agree "
3186 "on display brightness level\n",
3187 (unsigned int) lcmos,
3188 (unsigned int) lec);
3189 return -EIO;
3190 }
3191
3192 return level;
3193 }
3194
3195 static int brightness_set(int value)
3196 {
3197 int cmos_cmd, inc, i, res;
3198 int current_value;
3199
3200 if (value > 7)
3201 return -EINVAL;
3202
3203 res = mutex_lock_interruptible(&brightness_mutex);
3204 if (res < 0)
3205 return res;
3206
3207 current_value = brightness_get(NULL);
3208 if (current_value < 0) {
3209 res = current_value;
3210 goto errout;
3211 }
3212
3213 cmos_cmd = value > current_value ?
3214 TP_CMOS_BRIGHTNESS_UP :
3215 TP_CMOS_BRIGHTNESS_DOWN;
3216 inc = value > current_value ? 1 : -1;
3217
3218 res = 0;
3219 for (i = current_value; i != value; i += inc) {
3220 if ((brightness_mode & 2) &&
3221 issue_thinkpad_cmos_command(cmos_cmd)) {
3222 res = -EIO;
3223 goto errout;
3224 }
3225 if ((brightness_mode & 1) &&
3226 !acpi_ec_write(brightness_offset, i + inc)) {
3227 res = -EIO;
3228 goto errout;;
3229 }
3230 }
3231
3232 errout:
3233 mutex_unlock(&brightness_mutex);
3234 return res;
3235 }
3236
3237 static int brightness_read(char *p)
3238 {
3239 int len = 0;
3240 int level;
3241
3242 if ((level = brightness_get(NULL)) < 0) {
3243 len += sprintf(p + len, "level:\t\tunreadable\n");
3244 } else {
3245 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
3246 len += sprintf(p + len, "commands:\tup, down\n");
3247 len += sprintf(p + len, "commands:\tlevel <level>"
3248 " (<level> is 0-7)\n");
3249 }
3250
3251 return len;
3252 }
3253
3254 static int brightness_write(char *buf)
3255 {
3256 int level;
3257 int new_level;
3258 char *cmd;
3259
3260 while ((cmd = next_cmd(&buf))) {
3261 if ((level = brightness_get(NULL)) < 0)
3262 return level;
3263 level &= 7;
3264
3265 if (strlencmp(cmd, "up") == 0) {
3266 new_level = level == 7 ? 7 : level + 1;
3267 } else if (strlencmp(cmd, "down") == 0) {
3268 new_level = level == 0 ? 0 : level - 1;
3269 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3270 new_level >= 0 && new_level <= 7) {
3271 /* new_level set */
3272 } else
3273 return -EINVAL;
3274
3275 brightness_set(new_level);
3276 }
3277
3278 return 0;
3279 }
3280
3281 static struct ibm_struct brightness_driver_data = {
3282 .name = "brightness",
3283 .read = brightness_read,
3284 .write = brightness_write,
3285 .exit = brightness_exit,
3286 };
3287
3288 /*************************************************************************
3289 * Volume subdriver
3290 */
3291
3292 static int volume_read(char *p)
3293 {
3294 int len = 0;
3295 u8 level;
3296
3297 if (!acpi_ec_read(volume_offset, &level)) {
3298 len += sprintf(p + len, "level:\t\tunreadable\n");
3299 } else {
3300 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3301 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3302 len += sprintf(p + len, "commands:\tup, down, mute\n");
3303 len += sprintf(p + len, "commands:\tlevel <level>"
3304 " (<level> is 0-15)\n");
3305 }
3306
3307 return len;
3308 }
3309
3310 static int volume_write(char *buf)
3311 {
3312 int cmos_cmd, inc, i;
3313 u8 level, mute;
3314 int new_level, new_mute;
3315 char *cmd;
3316
3317 while ((cmd = next_cmd(&buf))) {
3318 if (!acpi_ec_read(volume_offset, &level))
3319 return -EIO;
3320 new_mute = mute = level & 0x40;
3321 new_level = level = level & 0xf;
3322
3323 if (strlencmp(cmd, "up") == 0) {
3324 if (mute)
3325 new_mute = 0;
3326 else
3327 new_level = level == 15 ? 15 : level + 1;
3328 } else if (strlencmp(cmd, "down") == 0) {
3329 if (mute)
3330 new_mute = 0;
3331 else
3332 new_level = level == 0 ? 0 : level - 1;
3333 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3334 new_level >= 0 && new_level <= 15) {
3335 /* new_level set */
3336 } else if (strlencmp(cmd, "mute") == 0) {
3337 new_mute = 0x40;
3338 } else
3339 return -EINVAL;
3340
3341 if (new_level != level) { /* mute doesn't change */
3342 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3343 inc = new_level > level ? 1 : -1;
3344
3345 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3346 !acpi_ec_write(volume_offset, level)))
3347 return -EIO;
3348
3349 for (i = level; i != new_level; i += inc)
3350 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3351 !acpi_ec_write(volume_offset, i + inc))
3352 return -EIO;
3353
3354 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3355 !acpi_ec_write(volume_offset,
3356 new_level + mute)))
3357 return -EIO;
3358 }
3359
3360 if (new_mute != mute) { /* level doesn't change */
3361 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3362
3363 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3364 !acpi_ec_write(volume_offset, level + new_mute))
3365 return -EIO;
3366 }
3367 }
3368
3369 return 0;
3370 }
3371
3372 static struct ibm_struct volume_driver_data = {
3373 .name = "volume",
3374 .read = volume_read,
3375 .write = volume_write,
3376 };
3377
3378 /*************************************************************************
3379 * Fan subdriver
3380 */
3381
3382 /*
3383 * FAN ACCESS MODES
3384 *
3385 * TPACPI_FAN_RD_ACPI_GFAN:
3386 * ACPI GFAN method: returns fan level
3387 *
3388 * see TPACPI_FAN_WR_ACPI_SFAN
3389 * EC 0x2f (HFSP) not available if GFAN exists
3390 *
3391 * TPACPI_FAN_WR_ACPI_SFAN:
3392 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3393 *
3394 * EC 0x2f (HFSP) might be available *for reading*, but do not use
3395 * it for writing.
3396 *
3397 * TPACPI_FAN_WR_TPEC:
3398 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
3399 * Supported on almost all ThinkPads
3400 *
3401 * Fan speed changes of any sort (including those caused by the
3402 * disengaged mode) are usually done slowly by the firmware as the
3403 * maximum ammount of fan duty cycle change per second seems to be
3404 * limited.
3405 *
3406 * Reading is not available if GFAN exists.
3407 * Writing is not available if SFAN exists.
3408 *
3409 * Bits
3410 * 7 automatic mode engaged;
3411 * (default operation mode of the ThinkPad)
3412 * fan level is ignored in this mode.
3413 * 6 full speed mode (takes precedence over bit 7);
3414 * not available on all thinkpads. May disable
3415 * the tachometer while the fan controller ramps up
3416 * the speed (which can take up to a few *minutes*).
3417 * Speeds up fan to 100% duty-cycle, which is far above
3418 * the standard RPM levels. It is not impossible that
3419 * it could cause hardware damage.
3420 * 5-3 unused in some models. Extra bits for fan level
3421 * in others, but still useless as all values above
3422 * 7 map to the same speed as level 7 in these models.
3423 * 2-0 fan level (0..7 usually)
3424 * 0x00 = stop
3425 * 0x07 = max (set when temperatures critical)
3426 * Some ThinkPads may have other levels, see
3427 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3428 *
3429 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3430 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3431 * does so, its initial value is meaningless (0x07).
3432 *
3433 * For firmware bugs, refer to:
3434 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3435 *
3436 * ----
3437 *
3438 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3439 * Main fan tachometer reading (in RPM)
3440 *
3441 * This register is present on all ThinkPads with a new-style EC, and
3442 * it is known not to be present on the A21m/e, and T22, as there is
3443 * something else in offset 0x84 according to the ACPI DSDT. Other
3444 * ThinkPads from this same time period (and earlier) probably lack the
3445 * tachometer as well.
3446 *
3447 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3448 * was never fixed by IBM to report the EC firmware version string
3449 * probably support the tachometer (like the early X models), so
3450 * detecting it is quite hard. We need more data to know for sure.
3451 *
3452 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3453 * might result.
3454 *
3455 * FIRMWARE BUG: may go stale while the EC is switching to full speed
3456 * mode.
3457 *
3458 * For firmware bugs, refer to:
3459 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3460 *
3461 * TPACPI_FAN_WR_ACPI_FANS:
3462 * ThinkPad X31, X40, X41. Not available in the X60.
3463 *
3464 * FANS ACPI handle: takes three arguments: low speed, medium speed,
3465 * high speed. ACPI DSDT seems to map these three speeds to levels
3466 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3467 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3468 *
3469 * The speeds are stored on handles
3470 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3471 *
3472 * There are three default speed sets, acessible as handles:
3473 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3474 *
3475 * ACPI DSDT switches which set is in use depending on various
3476 * factors.
3477 *
3478 * TPACPI_FAN_WR_TPEC is also available and should be used to
3479 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
3480 * but the ACPI tables just mention level 7.
3481 */
3482
3483 static enum fan_status_access_mode fan_status_access_mode;
3484 static enum fan_control_access_mode fan_control_access_mode;
3485 static enum fan_control_commands fan_control_commands;
3486
3487 static u8 fan_control_initial_status;
3488 static u8 fan_control_desired_level;
3489
3490 static void fan_watchdog_fire(struct work_struct *ignored);
3491 static int fan_watchdog_maxinterval;
3492 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3493
3494 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
3495 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
3496 "\\FSPD", /* 600e/x, 770e, 770x */
3497 ); /* all others */
3498 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
3499 "JFNS", /* 770x-JL */
3500 ); /* all others */
3501
3502 /*
3503 * SYSFS fan layout: hwmon compatible (device)
3504 *
3505 * pwm*_enable:
3506 * 0: "disengaged" mode
3507 * 1: manual mode
3508 * 2: native EC "auto" mode (recommended, hardware default)
3509 *
3510 * pwm*: set speed in manual mode, ignored otherwise.
3511 * 0 is level 0; 255 is level 7. Intermediate points done with linear
3512 * interpolation.
3513 *
3514 * fan*_input: tachometer reading, RPM
3515 *
3516 *
3517 * SYSFS fan layout: extensions
3518 *
3519 * fan_watchdog (driver):
3520 * fan watchdog interval in seconds, 0 disables (default), max 120
3521 */
3522
3523 /* sysfs fan pwm1_enable ----------------------------------------------- */
3524 static ssize_t fan_pwm1_enable_show(struct device *dev,
3525 struct device_attribute *attr,
3526 char *buf)
3527 {
3528 int res, mode;
3529 u8 status;
3530
3531 res = fan_get_status_safe(&status);
3532 if (res)
3533 return res;
3534
3535 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3536 if (status != fan_control_initial_status) {
3537 tp_features.fan_ctrl_status_undef = 0;
3538 } else {
3539 /* Return most likely status. In fact, it
3540 * might be the only possible status */
3541 status = TP_EC_FAN_AUTO;
3542 }
3543 }
3544
3545 if (status & TP_EC_FAN_FULLSPEED) {
3546 mode = 0;
3547 } else if (status & TP_EC_FAN_AUTO) {
3548 mode = 2;
3549 } else
3550 mode = 1;
3551
3552 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3553 }
3554
3555 static ssize_t fan_pwm1_enable_store(struct device *dev,
3556 struct device_attribute *attr,
3557 const char *buf, size_t count)
3558 {
3559 unsigned long t;
3560 int res, level;
3561
3562 if (parse_strtoul(buf, 2, &t))
3563 return -EINVAL;
3564
3565 switch (t) {
3566 case 0:
3567 level = TP_EC_FAN_FULLSPEED;
3568 break;
3569 case 1:
3570 level = TPACPI_FAN_LAST_LEVEL;
3571 break;
3572 case 2:
3573 level = TP_EC_FAN_AUTO;
3574 break;
3575 case 3:
3576 /* reserved for software-controlled auto mode */
3577 return -ENOSYS;
3578 default:
3579 return -EINVAL;
3580 }
3581
3582 res = fan_set_level_safe(level);
3583 if (res == -ENXIO)
3584 return -EINVAL;
3585 else if (res < 0)
3586 return res;
3587
3588 fan_watchdog_reset();
3589
3590 return count;
3591 }
3592
3593 static struct device_attribute dev_attr_fan_pwm1_enable =
3594 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3595 fan_pwm1_enable_show, fan_pwm1_enable_store);
3596
3597 /* sysfs fan pwm1 ------------------------------------------------------ */
3598 static ssize_t fan_pwm1_show(struct device *dev,
3599 struct device_attribute *attr,
3600 char *buf)
3601 {
3602 int res;
3603 u8 status;
3604
3605 res = fan_get_status_safe(&status);
3606 if (res)
3607 return res;
3608
3609 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3610 if (status != fan_control_initial_status) {
3611 tp_features.fan_ctrl_status_undef = 0;
3612 } else {
3613 status = TP_EC_FAN_AUTO;
3614 }
3615 }
3616
3617 if ((status &
3618 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3619 status = fan_control_desired_level;
3620
3621 if (status > 7)
3622 status = 7;
3623
3624 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3625 }
3626
3627 static ssize_t fan_pwm1_store(struct device *dev,
3628 struct device_attribute *attr,
3629 const char *buf, size_t count)
3630 {
3631 unsigned long s;
3632 int rc;
3633 u8 status, newlevel;
3634
3635 if (parse_strtoul(buf, 255, &s))
3636 return -EINVAL;
3637
3638 /* scale down from 0-255 to 0-7 */
3639 newlevel = (s >> 5) & 0x07;
3640
3641 rc = mutex_lock_interruptible(&fan_mutex);
3642 if (rc < 0)
3643 return rc;
3644
3645 rc = fan_get_status(&status);
3646 if (!rc && (status &
3647 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3648 rc = fan_set_level(newlevel);
3649 if (rc == -ENXIO)
3650 rc = -EINVAL;
3651 else if (!rc) {
3652 fan_update_desired_level(newlevel);
3653 fan_watchdog_reset();
3654 }
3655 }
3656
3657 mutex_unlock(&fan_mutex);
3658 return (rc)? rc : count;
3659 }
3660
3661 static struct device_attribute dev_attr_fan_pwm1 =
3662 __ATTR(pwm1, S_IWUSR | S_IRUGO,
3663 fan_pwm1_show, fan_pwm1_store);
3664
3665 /* sysfs fan fan1_input ------------------------------------------------ */
3666 static ssize_t fan_fan1_input_show(struct device *dev,
3667 struct device_attribute *attr,
3668 char *buf)
3669 {
3670 int res;
3671 unsigned int speed;
3672
3673 res = fan_get_speed(&speed);
3674 if (res < 0)
3675 return res;
3676
3677 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3678 }
3679
3680 static struct device_attribute dev_attr_fan_fan1_input =
3681 __ATTR(fan1_input, S_IRUGO,
3682 fan_fan1_input_show, NULL);
3683
3684 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3685 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3686 char *buf)
3687 {
3688 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3689 }
3690
3691 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3692 const char *buf, size_t count)
3693 {
3694 unsigned long t;
3695
3696 if (parse_strtoul(buf, 120, &t))
3697 return -EINVAL;
3698
3699 if (!fan_control_allowed)
3700 return -EPERM;
3701
3702 fan_watchdog_maxinterval = t;
3703 fan_watchdog_reset();
3704
3705 return count;
3706 }
3707
3708 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3709 fan_fan_watchdog_show, fan_fan_watchdog_store);
3710
3711 /* --------------------------------------------------------------------- */
3712 static struct attribute *fan_attributes[] = {
3713 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3714 &dev_attr_fan_fan1_input.attr,
3715 NULL
3716 };
3717
3718 static const struct attribute_group fan_attr_group = {
3719 .attrs = fan_attributes,
3720 };
3721
3722 static int __init fan_init(struct ibm_init_struct *iibm)
3723 {
3724 int rc;
3725
3726 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3727
3728 mutex_init(&fan_mutex);
3729 fan_status_access_mode = TPACPI_FAN_NONE;
3730 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3731 fan_control_commands = 0;
3732 fan_watchdog_maxinterval = 0;
3733 tp_features.fan_ctrl_status_undef = 0;
3734 fan_control_desired_level = 7;
3735
3736 IBM_ACPIHANDLE_INIT(fans);
3737 IBM_ACPIHANDLE_INIT(gfan);
3738 IBM_ACPIHANDLE_INIT(sfan);
3739
3740 if (gfan_handle) {
3741 /* 570, 600e/x, 770e, 770x */
3742 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3743 } else {
3744 /* all other ThinkPads: note that even old-style
3745 * ThinkPad ECs supports the fan control register */
3746 if (likely(acpi_ec_read(fan_status_offset,
3747 &fan_control_initial_status))) {
3748 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3749
3750 /* In some ThinkPads, neither the EC nor the ACPI
3751 * DSDT initialize the fan status, and it ends up
3752 * being set to 0x07 when it *could* be either
3753 * 0x07 or 0x80.
3754 *
3755 * Enable for TP-1Y (T43), TP-78 (R51e),
3756 * TP-76 (R52), TP-70 (T43, R52), which are known
3757 * to be buggy. */
3758 if (fan_control_initial_status == 0x07) {
3759 switch (thinkpad_id.ec_model) {
3760 case 0x5931: /* TP-1Y */
3761 case 0x3837: /* TP-78 */
3762 case 0x3637: /* TP-76 */
3763 case 0x3037: /* TP-70 */
3764 printk(IBM_NOTICE
3765 "fan_init: initial fan status is "
3766 "unknown, assuming it is in auto "
3767 "mode\n");
3768 tp_features.fan_ctrl_status_undef = 1;
3769 ;;
3770 }
3771 }
3772 } else {
3773 printk(IBM_ERR
3774 "ThinkPad ACPI EC access misbehaving, "
3775 "fan status and control unavailable\n");
3776 return 1;
3777 }
3778 }
3779
3780 if (sfan_handle) {
3781 /* 570, 770x-JL */
3782 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3783 fan_control_commands |=
3784 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3785 } else {
3786 if (!gfan_handle) {
3787 /* gfan without sfan means no fan control */
3788 /* all other models implement TP EC 0x2f control */
3789
3790 if (fans_handle) {
3791 /* X31, X40, X41 */
3792 fan_control_access_mode =
3793 TPACPI_FAN_WR_ACPI_FANS;
3794 fan_control_commands |=
3795 TPACPI_FAN_CMD_SPEED |
3796 TPACPI_FAN_CMD_LEVEL |
3797 TPACPI_FAN_CMD_ENABLE;
3798 } else {
3799 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3800 fan_control_commands |=
3801 TPACPI_FAN_CMD_LEVEL |
3802 TPACPI_FAN_CMD_ENABLE;
3803 }
3804 }
3805 }
3806
3807 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3808 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3809 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3810 fan_status_access_mode, fan_control_access_mode);
3811
3812 /* fan control master switch */
3813 if (!fan_control_allowed) {
3814 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3815 fan_control_commands = 0;
3816 dbg_printk(TPACPI_DBG_INIT,
3817 "fan control features disabled by parameter\n");
3818 }
3819
3820 /* update fan_control_desired_level */
3821 if (fan_status_access_mode != TPACPI_FAN_NONE)
3822 fan_get_status_safe(NULL);
3823
3824 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3825 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3826 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3827 &fan_attr_group);
3828 if (!(rc < 0))
3829 rc = driver_create_file(&tpacpi_pdriver.driver,
3830 &driver_attr_fan_watchdog);
3831 if (rc < 0)
3832 return rc;
3833 return 0;
3834 } else
3835 return 1;
3836 }
3837
3838 /*
3839 * Call with fan_mutex held
3840 */
3841 static void fan_update_desired_level(u8 status)
3842 {
3843 if ((status &
3844 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3845 if (status > 7)
3846 fan_control_desired_level = 7;
3847 else
3848 fan_control_desired_level = status;
3849 }
3850 }
3851
3852 static int fan_get_status(u8 *status)
3853 {
3854 u8 s;
3855
3856 /* TODO:
3857 * Add TPACPI_FAN_RD_ACPI_FANS ? */
3858
3859 switch (fan_status_access_mode) {
3860 case TPACPI_FAN_RD_ACPI_GFAN:
3861 /* 570, 600e/x, 770e, 770x */
3862
3863 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3864 return -EIO;
3865
3866 if (likely(status))
3867 *status = s & 0x07;
3868
3869 break;
3870
3871 case TPACPI_FAN_RD_TPEC:
3872 /* all except 570, 600e/x, 770e, 770x */
3873 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3874 return -EIO;
3875
3876 if (likely(status))
3877 *status = s;
3878
3879 break;
3880
3881 default:
3882 return -ENXIO;
3883 }
3884
3885 return 0;
3886 }
3887
3888 static int fan_get_status_safe(u8 *status)
3889 {
3890 int rc;
3891 u8 s;
3892
3893 rc = mutex_lock_interruptible(&fan_mutex);
3894 if (rc < 0)
3895 return rc;
3896 rc = fan_get_status(&s);
3897 if (!rc)
3898 fan_update_desired_level(s);
3899 mutex_unlock(&fan_mutex);
3900
3901 if (status)
3902 *status = s;
3903
3904 return rc;
3905 }
3906
3907 static void fan_exit(void)
3908 {
3909 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3910
3911 /* FIXME: can we really do this unconditionally? */
3912 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3913 driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3914
3915 cancel_delayed_work(&fan_watchdog_task);
3916 flush_scheduled_work();
3917 }
3918
3919 static int fan_get_speed(unsigned int *speed)
3920 {
3921 u8 hi, lo;
3922
3923 switch (fan_status_access_mode) {
3924 case TPACPI_FAN_RD_TPEC:
3925 /* all except 570, 600e/x, 770e, 770x */
3926 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3927 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3928 return -EIO;
3929
3930 if (likely(speed))
3931 *speed = (hi << 8) | lo;
3932
3933 break;
3934
3935 default:
3936 return -ENXIO;
3937 }
3938
3939 return 0;
3940 }
3941
3942 static void fan_watchdog_fire(struct work_struct *ignored)
3943 {
3944 int rc;
3945
3946 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
3947 return;
3948
3949 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3950 rc = fan_set_enable();
3951 if (rc < 0) {
3952 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3953 "will try again later...\n", -rc);
3954 /* reschedule for later */
3955 fan_watchdog_reset();
3956 }
3957 }
3958
3959 static void fan_watchdog_reset(void)
3960 {
3961 static int fan_watchdog_active;
3962
3963 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3964 return;
3965
3966 if (fan_watchdog_active)
3967 cancel_delayed_work(&fan_watchdog_task);
3968
3969 if (fan_watchdog_maxinterval > 0 &&
3970 tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
3971 fan_watchdog_active = 1;
3972 if (!schedule_delayed_work(&fan_watchdog_task,
3973 msecs_to_jiffies(fan_watchdog_maxinterval
3974 * 1000))) {
3975 printk(IBM_ERR "failed to schedule the fan watchdog, "
3976 "watchdog will not trigger\n");
3977 }
3978 } else
3979 fan_watchdog_active = 0;
3980 }
3981
3982 static int fan_set_level(int level)
3983 {
3984 if (!fan_control_allowed)
3985 return -EPERM;
3986
3987 switch (fan_control_access_mode) {
3988 case TPACPI_FAN_WR_ACPI_SFAN:
3989 if (level >= 0 && level <= 7) {
3990 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3991 return -EIO;
3992 } else
3993 return -EINVAL;
3994 break;
3995
3996 case TPACPI_FAN_WR_ACPI_FANS:
3997 case TPACPI_FAN_WR_TPEC:
3998 if ((level != TP_EC_FAN_AUTO) &&
3999 (level != TP_EC_FAN_FULLSPEED) &&
4000 ((level < 0) || (level > 7)))
4001 return -EINVAL;
4002
4003 /* safety net should the EC not support AUTO
4004 * or FULLSPEED mode bits and just ignore them */
4005 if (level & TP_EC_FAN_FULLSPEED)
4006 level |= 7; /* safety min speed 7 */
4007 else if (level & TP_EC_FAN_FULLSPEED)
4008 level |= 4; /* safety min speed 4 */
4009
4010 if (!acpi_ec_write(fan_status_offset, level))
4011 return -EIO;
4012 else
4013 tp_features.fan_ctrl_status_undef = 0;
4014 break;
4015
4016 default:
4017 return -ENXIO;
4018 }
4019 return 0;
4020 }
4021
4022 static int fan_set_level_safe(int level)
4023 {
4024 int rc;
4025
4026 if (!fan_control_allowed)
4027 return -EPERM;
4028
4029 rc = mutex_lock_interruptible(&fan_mutex);
4030 if (rc < 0)
4031 return rc;
4032
4033 if (level == TPACPI_FAN_LAST_LEVEL)
4034 level = fan_control_desired_level;
4035
4036 rc = fan_set_level(level);
4037 if (!rc)
4038 fan_update_desired_level(level);
4039
4040 mutex_unlock(&fan_mutex);
4041 return rc;
4042 }
4043
4044 static int fan_set_enable(void)
4045 {
4046 u8 s;
4047 int rc;
4048
4049 if (!fan_control_allowed)
4050 return -EPERM;
4051
4052 rc = mutex_lock_interruptible(&fan_mutex);
4053 if (rc < 0)
4054 return rc;
4055
4056 switch (fan_control_access_mode) {
4057 case TPACPI_FAN_WR_ACPI_FANS:
4058 case TPACPI_FAN_WR_TPEC:
4059 rc = fan_get_status(&s);
4060 if (rc < 0)
4061 break;
4062
4063 /* Don't go out of emergency fan mode */
4064 if (s != 7) {
4065 s &= 0x07;
4066 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4067 }
4068
4069 if (!acpi_ec_write(fan_status_offset, s))
4070 rc = -EIO;
4071 else {
4072 tp_features.fan_ctrl_status_undef = 0;
4073 rc = 0;
4074 }
4075 break;
4076
4077 case TPACPI_FAN_WR_ACPI_SFAN:
4078 rc = fan_get_status(&s);
4079 if (rc < 0)
4080 break;
4081
4082 s &= 0x07;
4083
4084 /* Set fan to at least level 4 */
4085 s |= 4;
4086
4087 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4088 rc= -EIO;
4089 else
4090 rc = 0;
4091 break;
4092
4093 default:
4094 rc = -ENXIO;
4095 }
4096
4097 mutex_unlock(&fan_mutex);
4098 return rc;
4099 }
4100
4101 static int fan_set_disable(void)
4102 {
4103 int rc;
4104
4105 if (!fan_control_allowed)
4106 return -EPERM;
4107
4108 rc = mutex_lock_interruptible(&fan_mutex);
4109 if (rc < 0)
4110 return rc;
4111
4112 rc = 0;
4113 switch (fan_control_access_mode) {
4114 case TPACPI_FAN_WR_ACPI_FANS:
4115 case TPACPI_FAN_WR_TPEC:
4116 if (!acpi_ec_write(fan_status_offset, 0x00))
4117 rc = -EIO;
4118 else {
4119 fan_control_desired_level = 0;
4120 tp_features.fan_ctrl_status_undef = 0;
4121 }
4122 break;
4123
4124 case TPACPI_FAN_WR_ACPI_SFAN:
4125 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4126 rc = -EIO;
4127 else
4128 fan_control_desired_level = 0;
4129 break;
4130
4131 default:
4132 rc = -ENXIO;
4133 }
4134
4135
4136 mutex_unlock(&fan_mutex);
4137 return rc;
4138 }
4139
4140 static int fan_set_speed(int speed)
4141 {
4142 int rc;
4143
4144 if (!fan_control_allowed)
4145 return -EPERM;
4146
4147 rc = mutex_lock_interruptible(&fan_mutex);
4148 if (rc < 0)
4149 return rc;
4150
4151 rc = 0;
4152 switch (fan_control_access_mode) {
4153 case TPACPI_FAN_WR_ACPI_FANS:
4154 if (speed >= 0 && speed <= 65535) {
4155 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4156 speed, speed, speed))
4157 rc = -EIO;
4158 } else
4159 rc = -EINVAL;
4160 break;
4161
4162 default:
4163 rc = -ENXIO;
4164 }
4165
4166 mutex_unlock(&fan_mutex);
4167 return rc;
4168 }
4169
4170 static int fan_read(char *p)
4171 {
4172 int len = 0;
4173 int rc;
4174 u8 status;
4175 unsigned int speed = 0;
4176
4177 switch (fan_status_access_mode) {
4178 case TPACPI_FAN_RD_ACPI_GFAN:
4179 /* 570, 600e/x, 770e, 770x */
4180 if ((rc = fan_get_status_safe(&status)) < 0)
4181 return rc;
4182
4183 len += sprintf(p + len, "status:\t\t%s\n"
4184 "level:\t\t%d\n",
4185 (status != 0) ? "enabled" : "disabled", status);
4186 break;
4187
4188 case TPACPI_FAN_RD_TPEC:
4189 /* all except 570, 600e/x, 770e, 770x */
4190 if ((rc = fan_get_status_safe(&status)) < 0)
4191 return rc;
4192
4193 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4194 if (status != fan_control_initial_status)
4195 tp_features.fan_ctrl_status_undef = 0;
4196 else
4197 /* Return most likely status. In fact, it
4198 * might be the only possible status */
4199 status = TP_EC_FAN_AUTO;
4200 }
4201
4202 len += sprintf(p + len, "status:\t\t%s\n",
4203 (status != 0) ? "enabled" : "disabled");
4204
4205 if ((rc = fan_get_speed(&speed)) < 0)
4206 return rc;
4207
4208 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4209
4210 if (status & TP_EC_FAN_FULLSPEED)
4211 /* Disengaged mode takes precedence */
4212 len += sprintf(p + len, "level:\t\tdisengaged\n");
4213 else if (status & TP_EC_FAN_AUTO)
4214 len += sprintf(p + len, "level:\t\tauto\n");
4215 else
4216 len += sprintf(p + len, "level:\t\t%d\n", status);
4217 break;
4218
4219 case TPACPI_FAN_NONE:
4220 default:
4221 len += sprintf(p + len, "status:\t\tnot supported\n");
4222 }
4223
4224 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4225 len += sprintf(p + len, "commands:\tlevel <level>");
4226
4227 switch (fan_control_access_mode) {
4228 case TPACPI_FAN_WR_ACPI_SFAN:
4229 len += sprintf(p + len, " (<level> is 0-7)\n");
4230 break;
4231
4232 default:
4233 len += sprintf(p + len, " (<level> is 0-7, "
4234 "auto, disengaged, full-speed)\n");
4235 break;
4236 }
4237 }
4238
4239 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4240 len += sprintf(p + len, "commands:\tenable, disable\n"
4241 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4242 "1-120 (seconds))\n");
4243
4244 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4245 len += sprintf(p + len, "commands:\tspeed <speed>"
4246 " (<speed> is 0-65535)\n");
4247
4248 return len;
4249 }
4250
4251 static int fan_write_cmd_level(const char *cmd, int *rc)
4252 {
4253 int level;
4254
4255 if (strlencmp(cmd, "level auto") == 0)
4256 level = TP_EC_FAN_AUTO;
4257 else if ((strlencmp(cmd, "level disengaged") == 0) |
4258 (strlencmp(cmd, "level full-speed") == 0))
4259 level = TP_EC_FAN_FULLSPEED;
4260 else if (sscanf(cmd, "level %d", &level) != 1)
4261 return 0;
4262
4263 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4264 printk(IBM_ERR "level command accepted for unsupported "
4265 "access mode %d", fan_control_access_mode);
4266
4267 return 1;
4268 }
4269
4270 static int fan_write_cmd_enable(const char *cmd, int *rc)
4271 {
4272 if (strlencmp(cmd, "enable") != 0)
4273 return 0;
4274
4275 if ((*rc = fan_set_enable()) == -ENXIO)
4276 printk(IBM_ERR "enable command accepted for unsupported "
4277 "access mode %d", fan_control_access_mode);
4278
4279 return 1;
4280 }
4281
4282 static int fan_write_cmd_disable(const char *cmd, int *rc)
4283 {
4284 if (strlencmp(cmd, "disable") != 0)
4285 return 0;
4286
4287 if ((*rc = fan_set_disable()) == -ENXIO)
4288 printk(IBM_ERR "disable command accepted for unsupported "
4289 "access mode %d", fan_control_access_mode);
4290
4291 return 1;
4292 }
4293
4294 static int fan_write_cmd_speed(const char *cmd, int *rc)
4295 {
4296 int speed;
4297
4298 /* TODO:
4299 * Support speed <low> <medium> <high> ? */
4300
4301 if (sscanf(cmd, "speed %d", &speed) != 1)
4302 return 0;
4303
4304 if ((*rc = fan_set_speed(speed)) == -ENXIO)
4305 printk(IBM_ERR "speed command accepted for unsupported "
4306 "access mode %d", fan_control_access_mode);
4307
4308 return 1;
4309 }
4310
4311 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4312 {
4313 int interval;
4314
4315 if (sscanf(cmd, "watchdog %d", &interval) != 1)
4316 return 0;
4317
4318 if (interval < 0 || interval > 120)
4319 *rc = -EINVAL;
4320 else
4321 fan_watchdog_maxinterval = interval;
4322
4323 return 1;
4324 }
4325
4326 static int fan_write(char *buf)
4327 {
4328 char *cmd;
4329 int rc = 0;
4330
4331 while (!rc && (cmd = next_cmd(&buf))) {
4332 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4333 fan_write_cmd_level(cmd, &rc)) &&
4334 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4335 (fan_write_cmd_enable(cmd, &rc) ||
4336 fan_write_cmd_disable(cmd, &rc) ||
4337 fan_write_cmd_watchdog(cmd, &rc))) &&
4338 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4339 fan_write_cmd_speed(cmd, &rc))
4340 )
4341 rc = -EINVAL;
4342 else if (!rc)
4343 fan_watchdog_reset();
4344 }
4345
4346 return rc;
4347 }
4348
4349 static struct ibm_struct fan_driver_data = {
4350 .name = "fan",
4351 .read = fan_read,
4352 .write = fan_write,
4353 .exit = fan_exit,
4354 };
4355
4356 /****************************************************************************
4357 ****************************************************************************
4358 *
4359 * Infrastructure
4360 *
4361 ****************************************************************************
4362 ****************************************************************************/
4363
4364 /* /proc support */
4365 static struct proc_dir_entry *proc_dir;
4366
4367 /* Subdriver registry */
4368 static LIST_HEAD(tpacpi_all_drivers);
4369
4370
4371 /*
4372 * Module and infrastructure proble, init and exit handling
4373 */
4374
4375 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4376 static const char * __init str_supported(int is_supported)
4377 {
4378 static char text_unsupported[] __initdata = "not supported";
4379
4380 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4381 }
4382 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4383
4384 static int __init ibm_init(struct ibm_init_struct *iibm)
4385 {
4386 int ret;
4387 struct ibm_struct *ibm = iibm->data;
4388 struct proc_dir_entry *entry;
4389
4390 BUG_ON(ibm == NULL);
4391
4392 INIT_LIST_HEAD(&ibm->all_drivers);
4393
4394 if (ibm->flags.experimental && !experimental)
4395 return 0;
4396
4397 dbg_printk(TPACPI_DBG_INIT,
4398 "probing for %s\n", ibm->name);
4399
4400 if (iibm->init) {
4401 ret = iibm->init(iibm);
4402 if (ret > 0)
4403 return 0; /* probe failed */
4404 if (ret)
4405 return ret;
4406
4407 ibm->flags.init_called = 1;
4408 }
4409
4410 if (ibm->acpi) {
4411 if (ibm->acpi->hid) {
4412 ret = register_tpacpi_subdriver(ibm);
4413 if (ret)
4414 goto err_out;
4415 }
4416
4417 if (ibm->acpi->notify) {
4418 ret = setup_acpi_notify(ibm);
4419 if (ret == -ENODEV) {
4420 printk(IBM_NOTICE "disabling subdriver %s\n",
4421 ibm->name);
4422 ret = 0;
4423 goto err_out;
4424 }
4425 if (ret < 0)
4426 goto err_out;
4427 }
4428 }
4429
4430 dbg_printk(TPACPI_DBG_INIT,
4431 "%s installed\n", ibm->name);
4432
4433 if (ibm->read) {
4434 entry = create_proc_entry(ibm->name,
4435 S_IFREG | S_IRUGO | S_IWUSR,
4436 proc_dir);
4437 if (!entry) {
4438 printk(IBM_ERR "unable to create proc entry %s\n",
4439 ibm->name);
4440 ret = -ENODEV;
4441 goto err_out;
4442 }
4443 entry->owner = THIS_MODULE;
4444 entry->data = ibm;
4445 entry->read_proc = &dispatch_procfs_read;
4446 if (ibm->write)
4447 entry->write_proc = &dispatch_procfs_write;
4448 ibm->flags.proc_created = 1;
4449 }
4450
4451 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4452
4453 return 0;
4454
4455 err_out:
4456 dbg_printk(TPACPI_DBG_INIT,
4457 "%s: at error exit path with result %d\n",
4458 ibm->name, ret);
4459
4460 ibm_exit(ibm);
4461 return (ret < 0)? ret : 0;
4462 }
4463
4464 static void ibm_exit(struct ibm_struct *ibm)
4465 {
4466 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4467
4468 list_del_init(&ibm->all_drivers);
4469
4470 if (ibm->flags.acpi_notify_installed) {
4471 dbg_printk(TPACPI_DBG_EXIT,
4472 "%s: acpi_remove_notify_handler\n", ibm->name);
4473 BUG_ON(!ibm->acpi);
4474 acpi_remove_notify_handler(*ibm->acpi->handle,
4475 ibm->acpi->type,
4476 dispatch_acpi_notify);
4477 ibm->flags.acpi_notify_installed = 0;
4478 ibm->flags.acpi_notify_installed = 0;
4479 }
4480
4481 if (ibm->flags.proc_created) {
4482 dbg_printk(TPACPI_DBG_EXIT,
4483 "%s: remove_proc_entry\n", ibm->name);
4484 remove_proc_entry(ibm->name, proc_dir);
4485 ibm->flags.proc_created = 0;
4486 }
4487
4488 if (ibm->flags.acpi_driver_registered) {
4489 dbg_printk(TPACPI_DBG_EXIT,
4490 "%s: acpi_bus_unregister_driver\n", ibm->name);
4491 BUG_ON(!ibm->acpi);
4492 acpi_bus_unregister_driver(ibm->acpi->driver);
4493 kfree(ibm->acpi->driver);
4494 ibm->acpi->driver = NULL;
4495 ibm->flags.acpi_driver_registered = 0;
4496 }
4497
4498 if (ibm->flags.init_called && ibm->exit) {
4499 ibm->exit();
4500 ibm->flags.init_called = 0;
4501 }
4502
4503 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4504 }
4505
4506 /* Probing */
4507
4508 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4509 {
4510 struct dmi_device *dev = NULL;
4511 char ec_fw_string[18];
4512
4513 if (!tp)
4514 return;
4515
4516 memset(tp, 0, sizeof(*tp));
4517
4518 if (dmi_name_in_vendors("IBM"))
4519 tp->vendor = PCI_VENDOR_ID_IBM;
4520 else if (dmi_name_in_vendors("LENOVO"))
4521 tp->vendor = PCI_VENDOR_ID_LENOVO;
4522 else
4523 return;
4524
4525 tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4526 GFP_KERNEL);
4527 if (!tp->bios_version_str)
4528 return;
4529 tp->bios_model = tp->bios_version_str[0]
4530 | (tp->bios_version_str[1] << 8);
4531
4532 /*
4533 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4534 * X32 or newer, all Z series; Some models must have an
4535 * up-to-date BIOS or they will not be detected.
4536 *
4537 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4538 */
4539 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4540 if (sscanf(dev->name,
4541 "IBM ThinkPad Embedded Controller -[%17c",
4542 ec_fw_string) == 1) {
4543 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4544 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4545
4546 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4547 tp->ec_model = ec_fw_string[0]
4548 | (ec_fw_string[1] << 8);
4549 break;
4550 }
4551 }
4552
4553 tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4554 GFP_KERNEL);
4555 if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4556 kfree(tp->model_str);
4557 tp->model_str = NULL;
4558 }
4559 }
4560
4561 static int __init probe_for_thinkpad(void)
4562 {
4563 int is_thinkpad;
4564
4565 if (acpi_disabled)
4566 return -ENODEV;
4567
4568 /*
4569 * Non-ancient models have better DMI tagging, but very old models
4570 * don't.
4571 */
4572 is_thinkpad = (thinkpad_id.model_str != NULL);
4573
4574 /* ec is required because many other handles are relative to it */
4575 IBM_ACPIHANDLE_INIT(ec);
4576 if (!ec_handle) {
4577 if (is_thinkpad)
4578 printk(IBM_ERR
4579 "Not yet supported ThinkPad detected!\n");
4580 return -ENODEV;
4581 }
4582
4583 /*
4584 * Risks a regression on very old machines, but reduces potential
4585 * false positives a damn great deal
4586 */
4587 if (!is_thinkpad)
4588 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4589
4590 if (!is_thinkpad && !force_load)
4591 return -ENODEV;
4592
4593 return 0;
4594 }
4595
4596
4597 /* Module init, exit, parameters */
4598
4599 static struct ibm_init_struct ibms_init[] __initdata = {
4600 {
4601 .init = thinkpad_acpi_driver_init,
4602 .data = &thinkpad_acpi_driver_data,
4603 },
4604 {
4605 .init = hotkey_init,
4606 .data = &hotkey_driver_data,
4607 },
4608 {
4609 .init = bluetooth_init,
4610 .data = &bluetooth_driver_data,
4611 },
4612 {
4613 .init = wan_init,
4614 .data = &wan_driver_data,
4615 },
4616 {
4617 .init = video_init,
4618 .data = &video_driver_data,
4619 },
4620 {
4621 .init = light_init,
4622 .data = &light_driver_data,
4623 },
4624 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4625 {
4626 .init = dock_init,
4627 .data = &dock_driver_data[0],
4628 },
4629 {
4630 .init = dock_init2,
4631 .data = &dock_driver_data[1],
4632 },
4633 #endif
4634 #ifdef CONFIG_THINKPAD_ACPI_BAY
4635 {
4636 .init = bay_init,
4637 .data = &bay_driver_data,
4638 },
4639 #endif
4640 {
4641 .init = cmos_init,
4642 .data = &cmos_driver_data,
4643 },
4644 {
4645 .init = led_init,
4646 .data = &led_driver_data,
4647 },
4648 {
4649 .init = beep_init,
4650 .data = &beep_driver_data,
4651 },
4652 {
4653 .init = thermal_init,
4654 .data = &thermal_driver_data,
4655 },
4656 {
4657 .data = &ecdump_driver_data,
4658 },
4659 {
4660 .init = brightness_init,
4661 .data = &brightness_driver_data,
4662 },
4663 {
4664 .data = &volume_driver_data,
4665 },
4666 {
4667 .init = fan_init,
4668 .data = &fan_driver_data,
4669 },
4670 };
4671
4672 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4673 {
4674 unsigned int i;
4675 struct ibm_struct *ibm;
4676
4677 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4678 ibm = ibms_init[i].data;
4679 BUG_ON(ibm == NULL);
4680
4681 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4682 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4683 return -ENOSPC;
4684 strcpy(ibms_init[i].param, val);
4685 strcat(ibms_init[i].param, ",");
4686 return 0;
4687 }
4688 }
4689
4690 return -EINVAL;
4691 }
4692
4693 static int experimental;
4694 module_param(experimental, int, 0);
4695
4696 static u32 dbg_level;
4697 module_param_named(debug, dbg_level, uint, 0);
4698
4699 static int force_load;
4700 module_param(force_load, bool, 0);
4701
4702 static int fan_control_allowed;
4703 module_param_named(fan_control, fan_control_allowed, bool, 0);
4704
4705 static int brightness_mode;
4706 module_param_named(brightness_mode, brightness_mode, int, 0);
4707
4708 static unsigned int hotkey_report_mode;
4709 module_param(hotkey_report_mode, uint, 0);
4710
4711 #define IBM_PARAM(feature) \
4712 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4713
4714 IBM_PARAM(hotkey);
4715 IBM_PARAM(bluetooth);
4716 IBM_PARAM(video);
4717 IBM_PARAM(light);
4718 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4719 IBM_PARAM(dock);
4720 #endif
4721 #ifdef CONFIG_THINKPAD_ACPI_BAY
4722 IBM_PARAM(bay);
4723 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4724 IBM_PARAM(cmos);
4725 IBM_PARAM(led);
4726 IBM_PARAM(beep);
4727 IBM_PARAM(ecdump);
4728 IBM_PARAM(brightness);
4729 IBM_PARAM(volume);
4730 IBM_PARAM(fan);
4731
4732 static int __init thinkpad_acpi_module_init(void)
4733 {
4734 int ret, i;
4735
4736 tpacpi_lifecycle = TPACPI_LIFE_INIT;
4737
4738 /* Parameter checking */
4739 if (hotkey_report_mode > 2)
4740 return -EINVAL;
4741
4742 /* Driver-level probe */
4743
4744 get_thinkpad_model_data(&thinkpad_id);
4745 ret = probe_for_thinkpad();
4746 if (ret) {
4747 thinkpad_acpi_module_exit();
4748 return ret;
4749 }
4750
4751 /* Driver initialization */
4752
4753 IBM_ACPIHANDLE_INIT(ecrd);
4754 IBM_ACPIHANDLE_INIT(ecwr);
4755
4756 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4757 if (!proc_dir) {
4758 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4759 thinkpad_acpi_module_exit();
4760 return -ENODEV;
4761 }
4762 proc_dir->owner = THIS_MODULE;
4763
4764 ret = platform_driver_register(&tpacpi_pdriver);
4765 if (ret) {
4766 printk(IBM_ERR "unable to register platform driver\n");
4767 thinkpad_acpi_module_exit();
4768 return ret;
4769 }
4770 tp_features.platform_drv_registered = 1;
4771
4772 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4773 if (ret) {
4774 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4775 thinkpad_acpi_module_exit();
4776 return ret;
4777 }
4778 tp_features.platform_drv_attrs_registered = 1;
4779
4780
4781 /* Device initialization */
4782 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4783 NULL, 0);
4784 if (IS_ERR(tpacpi_pdev)) {
4785 ret = PTR_ERR(tpacpi_pdev);
4786 tpacpi_pdev = NULL;
4787 printk(IBM_ERR "unable to register platform device\n");
4788 thinkpad_acpi_module_exit();
4789 return ret;
4790 }
4791 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4792 if (IS_ERR(tpacpi_hwmon)) {
4793 ret = PTR_ERR(tpacpi_hwmon);
4794 tpacpi_hwmon = NULL;
4795 printk(IBM_ERR "unable to register hwmon device\n");
4796 thinkpad_acpi_module_exit();
4797 return ret;
4798 }
4799 mutex_init(&tpacpi_inputdev_send_mutex);
4800 tpacpi_inputdev = input_allocate_device();
4801 if (!tpacpi_inputdev) {
4802 printk(IBM_ERR "unable to allocate input device\n");
4803 thinkpad_acpi_module_exit();
4804 return -ENOMEM;
4805 } else {
4806 /* Prepare input device, but don't register */
4807 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4808 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4809 tpacpi_inputdev->id.bustype = BUS_HOST;
4810 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
4811 thinkpad_id.vendor :
4812 PCI_VENDOR_ID_IBM;
4813 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4814 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4815 }
4816 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4817 ret = ibm_init(&ibms_init[i]);
4818 if (ret >= 0 && *ibms_init[i].param)
4819 ret = ibms_init[i].data->write(ibms_init[i].param);
4820 if (ret < 0) {
4821 thinkpad_acpi_module_exit();
4822 return ret;
4823 }
4824 }
4825 ret = input_register_device(tpacpi_inputdev);
4826 if (ret < 0) {
4827 printk(IBM_ERR "unable to register input device\n");
4828 thinkpad_acpi_module_exit();
4829 return ret;
4830 } else {
4831 tp_features.input_device_registered = 1;
4832 }
4833
4834 tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
4835 return 0;
4836 }
4837
4838 static void thinkpad_acpi_module_exit(void)
4839 {
4840 struct ibm_struct *ibm, *itmp;
4841
4842 tpacpi_lifecycle = TPACPI_LIFE_EXITING;
4843
4844 list_for_each_entry_safe_reverse(ibm, itmp,
4845 &tpacpi_all_drivers,
4846 all_drivers) {
4847 ibm_exit(ibm);
4848 }
4849
4850 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4851
4852 if (tpacpi_inputdev) {
4853 if (tp_features.input_device_registered)
4854 input_unregister_device(tpacpi_inputdev);
4855 else
4856 input_free_device(tpacpi_inputdev);
4857 }
4858
4859 if (tpacpi_hwmon)
4860 hwmon_device_unregister(tpacpi_hwmon);
4861
4862 if (tpacpi_pdev)
4863 platform_device_unregister(tpacpi_pdev);
4864
4865 if (tp_features.platform_drv_attrs_registered)
4866 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4867
4868 if (tp_features.platform_drv_registered)
4869 platform_driver_unregister(&tpacpi_pdriver);
4870
4871 if (proc_dir)
4872 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4873
4874 kfree(thinkpad_id.bios_version_str);
4875 kfree(thinkpad_id.ec_version_str);
4876 kfree(thinkpad_id.model_str);
4877 }
4878
4879 module_init(thinkpad_acpi_module_init);
4880 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree