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ACPI: thinkpad-acpi: checkpoint sysfs interface version due to input layer
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blob89160d8b771e288ae8eb7e58908521887fb18449
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define IBM_VERSION "0.14"
25 #define TPACPI_SYSFS_VERSION 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 /****************************************************************************
121 ****************************************************************************
122 *
123 * ACPI Helpers and device model
124 *
125 ****************************************************************************
126 ****************************************************************************/
127
128 /*************************************************************************
129 * ACPI basic handles
130 */
131
132 static acpi_handle root_handle;
133
134 #define IBM_HANDLE(object, parent, paths...) \
135 static acpi_handle object##_handle; \
136 static acpi_handle *object##_parent = &parent##_handle; \
137 static char *object##_path; \
138 static char *object##_paths[] = { paths }
139
140 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
141 "\\_SB.PCI.ISA.EC", /* 570 */
142 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
143 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
144 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
145 "\\_SB.PCI0.ICH3.EC0", /* R31 */
146 "\\_SB.PCI0.LPC.EC", /* all others */
147 );
148
149 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
150 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
151
152
153 /*************************************************************************
154 * Misc ACPI handles
155 */
156
157 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
158 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
159 "\\CMS", /* R40, R40e */
160 ); /* all others */
161
162 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
163 "^HKEY", /* R30, R31 */
164 "HKEY", /* all others */
165 ); /* 570 */
166
167
168 /*************************************************************************
169 * ACPI helpers
170 */
171
172 static int acpi_evalf(acpi_handle handle,
173 void *res, char *method, char *fmt, ...)
174 {
175 char *fmt0 = fmt;
176 struct acpi_object_list params;
177 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
178 struct acpi_buffer result, *resultp;
179 union acpi_object out_obj;
180 acpi_status status;
181 va_list ap;
182 char res_type;
183 int success;
184 int quiet;
185
186 if (!*fmt) {
187 printk(IBM_ERR "acpi_evalf() called with empty format\n");
188 return 0;
189 }
190
191 if (*fmt == 'q') {
192 quiet = 1;
193 fmt++;
194 } else
195 quiet = 0;
196
197 res_type = *(fmt++);
198
199 params.count = 0;
200 params.pointer = &in_objs[0];
201
202 va_start(ap, fmt);
203 while (*fmt) {
204 char c = *(fmt++);
205 switch (c) {
206 case 'd': /* int */
207 in_objs[params.count].integer.value = va_arg(ap, int);
208 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
209 break;
210 /* add more types as needed */
211 default:
212 printk(IBM_ERR "acpi_evalf() called "
213 "with invalid format character '%c'\n", c);
214 return 0;
215 }
216 }
217 va_end(ap);
218
219 if (res_type != 'v') {
220 result.length = sizeof(out_obj);
221 result.pointer = &out_obj;
222 resultp = &result;
223 } else
224 resultp = NULL;
225
226 status = acpi_evaluate_object(handle, method, &params, resultp);
227
228 switch (res_type) {
229 case 'd': /* int */
230 if (res)
231 *(int *)res = out_obj.integer.value;
232 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
233 break;
234 case 'v': /* void */
235 success = status == AE_OK;
236 break;
237 /* add more types as needed */
238 default:
239 printk(IBM_ERR "acpi_evalf() called "
240 "with invalid format character '%c'\n", res_type);
241 return 0;
242 }
243
244 if (!success && !quiet)
245 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
246 method, fmt0, status);
247
248 return success;
249 }
250
251 static void __unused acpi_print_int(acpi_handle handle, char *method)
252 {
253 int i;
254
255 if (acpi_evalf(handle, &i, method, "d"))
256 printk(IBM_INFO "%s = 0x%x\n", method, i);
257 else
258 printk(IBM_ERR "error calling %s\n", method);
259 }
260
261 static int acpi_ec_read(int i, u8 * p)
262 {
263 int v;
264
265 if (ecrd_handle) {
266 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
267 return 0;
268 *p = v;
269 } else {
270 if (ec_read(i, p) < 0)
271 return 0;
272 }
273
274 return 1;
275 }
276
277 static int acpi_ec_write(int i, u8 v)
278 {
279 if (ecwr_handle) {
280 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
281 return 0;
282 } else {
283 if (ec_write(i, v) < 0)
284 return 0;
285 }
286
287 return 1;
288 }
289
290 static int _sta(acpi_handle handle)
291 {
292 int status;
293
294 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
295 status = 0;
296
297 return status;
298 }
299
300 static int issue_thinkpad_cmos_command(int cmos_cmd)
301 {
302 if (!cmos_handle)
303 return -ENXIO;
304
305 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
306 return -EIO;
307
308 return 0;
309 }
310
311 /*************************************************************************
312 * ACPI device model
313 */
314
315 static void drv_acpi_handle_init(char *name,
316 acpi_handle *handle, acpi_handle parent,
317 char **paths, int num_paths, char **path)
318 {
319 int i;
320 acpi_status status;
321
322 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
323 name);
324
325 for (i = 0; i < num_paths; i++) {
326 status = acpi_get_handle(parent, paths[i], handle);
327 if (ACPI_SUCCESS(status)) {
328 *path = paths[i];
329 dbg_printk(TPACPI_DBG_INIT,
330 "Found ACPI handle %s for %s\n",
331 *path, name);
332 return;
333 }
334 }
335
336 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
337 name);
338 *handle = NULL;
339 }
340
341 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
342 {
343 struct ibm_struct *ibm = data;
344
345 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
346 return;
347
348 ibm->acpi->notify(ibm, event);
349 }
350
351 static int __init setup_acpi_notify(struct ibm_struct *ibm)
352 {
353 acpi_status status;
354 int rc;
355
356 BUG_ON(!ibm->acpi);
357
358 if (!*ibm->acpi->handle)
359 return 0;
360
361 vdbg_printk(TPACPI_DBG_INIT,
362 "setting up ACPI notify for %s\n", ibm->name);
363
364 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
365 if (rc < 0) {
366 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
367 ibm->name, rc);
368 return -ENODEV;
369 }
370
371 acpi_driver_data(ibm->acpi->device) = ibm;
372 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
373 IBM_ACPI_EVENT_PREFIX,
374 ibm->name);
375
376 status = acpi_install_notify_handler(*ibm->acpi->handle,
377 ibm->acpi->type, dispatch_acpi_notify, ibm);
378 if (ACPI_FAILURE(status)) {
379 if (status == AE_ALREADY_EXISTS) {
380 printk(IBM_NOTICE "another device driver is already handling %s events\n",
381 ibm->name);
382 } else {
383 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
384 ibm->name, status);
385 }
386 return -ENODEV;
387 }
388 ibm->flags.acpi_notify_installed = 1;
389 return 0;
390 }
391
392 static int __init tpacpi_device_add(struct acpi_device *device)
393 {
394 return 0;
395 }
396
397 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
398 {
399 int rc;
400
401 dbg_printk(TPACPI_DBG_INIT,
402 "registering %s as an ACPI driver\n", ibm->name);
403
404 BUG_ON(!ibm->acpi);
405
406 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
407 if (!ibm->acpi->driver) {
408 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
409 return -ENOMEM;
410 }
411
412 sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
413 ibm->acpi->driver->ids = ibm->acpi->hid;
414 ibm->acpi->driver->ops.add = &tpacpi_device_add;
415
416 rc = acpi_bus_register_driver(ibm->acpi->driver);
417 if (rc < 0) {
418 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
419 ibm->acpi->hid, rc);
420 kfree(ibm->acpi->driver);
421 ibm->acpi->driver = NULL;
422 } else if (!rc)
423 ibm->flags.acpi_driver_registered = 1;
424
425 return rc;
426 }
427
428
429 /****************************************************************************
430 ****************************************************************************
431 *
432 * Procfs Helpers
433 *
434 ****************************************************************************
435 ****************************************************************************/
436
437 static int dispatch_procfs_read(char *page, char **start, off_t off,
438 int count, int *eof, void *data)
439 {
440 struct ibm_struct *ibm = data;
441 int len;
442
443 if (!ibm || !ibm->read)
444 return -EINVAL;
445
446 len = ibm->read(page);
447 if (len < 0)
448 return len;
449
450 if (len <= off + count)
451 *eof = 1;
452 *start = page + off;
453 len -= off;
454 if (len > count)
455 len = count;
456 if (len < 0)
457 len = 0;
458
459 return len;
460 }
461
462 static int dispatch_procfs_write(struct file *file,
463 const char __user * userbuf,
464 unsigned long count, void *data)
465 {
466 struct ibm_struct *ibm = data;
467 char *kernbuf;
468 int ret;
469
470 if (!ibm || !ibm->write)
471 return -EINVAL;
472
473 kernbuf = kmalloc(count + 2, GFP_KERNEL);
474 if (!kernbuf)
475 return -ENOMEM;
476
477 if (copy_from_user(kernbuf, userbuf, count)) {
478 kfree(kernbuf);
479 return -EFAULT;
480 }
481
482 kernbuf[count] = 0;
483 strcat(kernbuf, ",");
484 ret = ibm->write(kernbuf);
485 if (ret == 0)
486 ret = count;
487
488 kfree(kernbuf);
489
490 return ret;
491 }
492
493 static char *next_cmd(char **cmds)
494 {
495 char *start = *cmds;
496 char *end;
497
498 while ((end = strchr(start, ',')) && end == start)
499 start = end + 1;
500
501 if (!end)
502 return NULL;
503
504 *end = 0;
505 *cmds = end + 1;
506 return start;
507 }
508
509
510 /****************************************************************************
511 ****************************************************************************
512 *
513 * Device model: input, hwmon and platform
514 *
515 ****************************************************************************
516 ****************************************************************************/
517
518 static struct platform_device *tpacpi_pdev;
519 static struct class_device *tpacpi_hwmon;
520 static struct input_dev *tpacpi_inputdev;
521
522
523 static int tpacpi_resume_handler(struct platform_device *pdev)
524 {
525 struct ibm_struct *ibm, *itmp;
526
527 list_for_each_entry_safe(ibm, itmp,
528 &tpacpi_all_drivers,
529 all_drivers) {
530 if (ibm->resume)
531 (ibm->resume)();
532 }
533
534 return 0;
535 }
536
537 static struct platform_driver tpacpi_pdriver = {
538 .driver = {
539 .name = IBM_DRVR_NAME,
540 .owner = THIS_MODULE,
541 },
542 .resume = tpacpi_resume_handler,
543 };
544
545
546 /*************************************************************************
547 * thinkpad-acpi driver attributes
548 */
549
550 /* interface_version --------------------------------------------------- */
551 static ssize_t tpacpi_driver_interface_version_show(
552 struct device_driver *drv,
553 char *buf)
554 {
555 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
556 }
557
558 static DRIVER_ATTR(interface_version, S_IRUGO,
559 tpacpi_driver_interface_version_show, NULL);
560
561 /* debug_level --------------------------------------------------------- */
562 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
563 char *buf)
564 {
565 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
566 }
567
568 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
569 const char *buf, size_t count)
570 {
571 unsigned long t;
572
573 if (parse_strtoul(buf, 0xffff, &t))
574 return -EINVAL;
575
576 dbg_level = t;
577
578 return count;
579 }
580
581 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
582 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
583
584 /* version ------------------------------------------------------------- */
585 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
586 char *buf)
587 {
588 return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
589 }
590
591 static DRIVER_ATTR(version, S_IRUGO,
592 tpacpi_driver_version_show, NULL);
593
594 /* --------------------------------------------------------------------- */
595
596 static struct driver_attribute* tpacpi_driver_attributes[] = {
597 &driver_attr_debug_level, &driver_attr_version,
598 &driver_attr_interface_version,
599 };
600
601 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
602 {
603 int i, res;
604
605 i = 0;
606 res = 0;
607 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
608 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
609 i++;
610 }
611
612 return res;
613 }
614
615 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
616 {
617 int i;
618
619 for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
620 driver_remove_file(drv, tpacpi_driver_attributes[i]);
621 }
622
623 /*************************************************************************
624 * sysfs support helpers
625 */
626
627 struct attribute_set_obj {
628 struct attribute_set s;
629 struct attribute *a;
630 } __attribute__((packed));
631
632 static struct attribute_set *create_attr_set(unsigned int max_members,
633 const char* name)
634 {
635 struct attribute_set_obj *sobj;
636
637 if (max_members == 0)
638 return NULL;
639
640 /* Allocates space for implicit NULL at the end too */
641 sobj = kzalloc(sizeof(struct attribute_set_obj) +
642 max_members * sizeof(struct attribute *),
643 GFP_KERNEL);
644 if (!sobj)
645 return NULL;
646 sobj->s.max_members = max_members;
647 sobj->s.group.attrs = &sobj->a;
648 sobj->s.group.name = name;
649
650 return &sobj->s;
651 }
652
653 /* not multi-threaded safe, use it in a single thread per set */
654 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
655 {
656 if (!s || !attr)
657 return -EINVAL;
658
659 if (s->members >= s->max_members)
660 return -ENOMEM;
661
662 s->group.attrs[s->members] = attr;
663 s->members++;
664
665 return 0;
666 }
667
668 static int add_many_to_attr_set(struct attribute_set* s,
669 struct attribute **attr,
670 unsigned int count)
671 {
672 int i, res;
673
674 for (i = 0; i < count; i++) {
675 res = add_to_attr_set(s, attr[i]);
676 if (res)
677 return res;
678 }
679
680 return 0;
681 }
682
683 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
684 {
685 sysfs_remove_group(kobj, &s->group);
686 destroy_attr_set(s);
687 }
688
689 static int parse_strtoul(const char *buf,
690 unsigned long max, unsigned long *value)
691 {
692 char *endp;
693
694 *value = simple_strtoul(buf, &endp, 0);
695 while (*endp && isspace(*endp))
696 endp++;
697 if (*endp || *value > max)
698 return -EINVAL;
699
700 return 0;
701 }
702
703 /****************************************************************************
704 ****************************************************************************
705 *
706 * Subdrivers
707 *
708 ****************************************************************************
709 ****************************************************************************/
710
711 /*************************************************************************
712 * thinkpad-acpi init subdriver
713 */
714
715 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
716 {
717 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
718 printk(IBM_INFO "%s\n", IBM_URL);
719
720 if (ibm_thinkpad_ec_found)
721 printk(IBM_INFO "ThinkPad EC firmware %s\n",
722 ibm_thinkpad_ec_found);
723
724 return 0;
725 }
726
727 static int thinkpad_acpi_driver_read(char *p)
728 {
729 int len = 0;
730
731 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
732 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
733
734 return len;
735 }
736
737 static struct ibm_struct thinkpad_acpi_driver_data = {
738 .name = "driver",
739 .read = thinkpad_acpi_driver_read,
740 };
741
742 /*************************************************************************
743 * Hotkey subdriver
744 */
745
746 static int hotkey_orig_status;
747 static u32 hotkey_orig_mask;
748 static u32 hotkey_all_mask;
749 static u32 hotkey_reserved_mask;
750
751 static u16 hotkey_keycode_map[] = {
752 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
753 KEY_FN_F1, KEY_FN_F2, KEY_FN_F3, KEY_SLEEP,
754 KEY_FN_F5, KEY_FN_F6, KEY_FN_F7, KEY_FN_F8,
755 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
756 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
757 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
758 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
759 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
760 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
761 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
762 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
763 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
764 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
765 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
766 KEY_RESERVED, /* 0x14: VOLUME UP */
767 KEY_RESERVED, /* 0x15: VOLUME DOWN */
768 KEY_RESERVED, /* 0x16: MUTE */
769 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
770 /* (assignments unknown, please report if found) */
771 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
772 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
773 };
774
775 static struct attribute_set *hotkey_dev_attributes;
776
777 static int hotkey_get_wlsw(int *status)
778 {
779 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
780 return -EIO;
781 return 0;
782 }
783
784 /* sysfs hotkey enable ------------------------------------------------- */
785 static ssize_t hotkey_enable_show(struct device *dev,
786 struct device_attribute *attr,
787 char *buf)
788 {
789 int res, status;
790 u32 mask;
791
792 res = hotkey_get(&status, &mask);
793 if (res)
794 return res;
795
796 return snprintf(buf, PAGE_SIZE, "%d\n", status);
797 }
798
799 static ssize_t hotkey_enable_store(struct device *dev,
800 struct device_attribute *attr,
801 const char *buf, size_t count)
802 {
803 unsigned long t;
804 int res, status;
805 u32 mask;
806
807 if (parse_strtoul(buf, 1, &t))
808 return -EINVAL;
809
810 res = hotkey_get(&status, &mask);
811 if (!res)
812 res = hotkey_set(t, mask);
813
814 return (res) ? res : count;
815 }
816
817 static struct device_attribute dev_attr_hotkey_enable =
818 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
819 hotkey_enable_show, hotkey_enable_store);
820
821 /* sysfs hotkey mask --------------------------------------------------- */
822 static ssize_t hotkey_mask_show(struct device *dev,
823 struct device_attribute *attr,
824 char *buf)
825 {
826 int res, status;
827 u32 mask;
828
829 res = hotkey_get(&status, &mask);
830 if (res)
831 return res;
832
833 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
834 }
835
836 static ssize_t hotkey_mask_store(struct device *dev,
837 struct device_attribute *attr,
838 const char *buf, size_t count)
839 {
840 unsigned long t;
841 int res, status;
842 u32 mask;
843
844 if (parse_strtoul(buf, 0xffffffffUL, &t))
845 return -EINVAL;
846
847 res = hotkey_get(&status, &mask);
848 if (!res)
849 hotkey_set(status, t);
850
851 return (res) ? res : count;
852 }
853
854 static struct device_attribute dev_attr_hotkey_mask =
855 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
856 hotkey_mask_show, hotkey_mask_store);
857
858 /* sysfs hotkey bios_enabled ------------------------------------------- */
859 static ssize_t hotkey_bios_enabled_show(struct device *dev,
860 struct device_attribute *attr,
861 char *buf)
862 {
863 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
864 }
865
866 static struct device_attribute dev_attr_hotkey_bios_enabled =
867 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
868
869 /* sysfs hotkey bios_mask ---------------------------------------------- */
870 static ssize_t hotkey_bios_mask_show(struct device *dev,
871 struct device_attribute *attr,
872 char *buf)
873 {
874 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
875 }
876
877 static struct device_attribute dev_attr_hotkey_bios_mask =
878 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
879
880 /* sysfs hotkey all_mask ----------------------------------------------- */
881 static ssize_t hotkey_all_mask_show(struct device *dev,
882 struct device_attribute *attr,
883 char *buf)
884 {
885 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
886 }
887
888 static struct device_attribute dev_attr_hotkey_all_mask =
889 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
890
891 /* sysfs hotkey recommended_mask --------------------------------------- */
892 static ssize_t hotkey_recommended_mask_show(struct device *dev,
893 struct device_attribute *attr,
894 char *buf)
895 {
896 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
897 hotkey_all_mask & ~hotkey_reserved_mask);
898 }
899
900 static struct device_attribute dev_attr_hotkey_recommended_mask =
901 __ATTR(hotkey_recommended_mask, S_IRUGO,
902 hotkey_recommended_mask_show, NULL);
903
904 /* sysfs hotkey radio_sw ----------------------------------------------- */
905 static ssize_t hotkey_radio_sw_show(struct device *dev,
906 struct device_attribute *attr,
907 char *buf)
908 {
909 int res, s;
910 res = hotkey_get_wlsw(&s);
911 if (res < 0)
912 return res;
913
914 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
915 }
916
917 static struct device_attribute dev_attr_hotkey_radio_sw =
918 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
919
920 /* --------------------------------------------------------------------- */
921
922 static struct attribute *hotkey_mask_attributes[] = {
923 &dev_attr_hotkey_mask.attr,
924 &dev_attr_hotkey_bios_enabled.attr,
925 &dev_attr_hotkey_bios_mask.attr,
926 &dev_attr_hotkey_all_mask.attr,
927 &dev_attr_hotkey_recommended_mask.attr,
928 };
929
930 static int __init hotkey_init(struct ibm_init_struct *iibm)
931 {
932 int res, i;
933 int status;
934
935 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
936
937 BUG_ON(!tpacpi_inputdev);
938
939 IBM_ACPIHANDLE_INIT(hkey);
940 mutex_init(&hotkey_mutex);
941
942 /* hotkey not supported on 570 */
943 tp_features.hotkey = hkey_handle != NULL;
944
945 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
946 str_supported(tp_features.hotkey));
947
948 if (tp_features.hotkey) {
949 hotkey_dev_attributes = create_attr_set(7, NULL);
950 if (!hotkey_dev_attributes)
951 return -ENOMEM;
952 res = add_to_attr_set(hotkey_dev_attributes,
953 &dev_attr_hotkey_enable.attr);
954 if (res)
955 return res;
956
957 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
958 A30, R30, R31, T20-22, X20-21, X22-24 */
959 tp_features.hotkey_mask =
960 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
961
962 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
963 str_supported(tp_features.hotkey_mask));
964
965 if (tp_features.hotkey_mask) {
966 /* MHKA available in A31, R40, R40e, T4x, X31, and later */
967 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
968 "MHKA", "qd"))
969 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
970 }
971
972 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
973 if (!res && tp_features.hotkey_mask) {
974 res = add_many_to_attr_set(hotkey_dev_attributes,
975 hotkey_mask_attributes,
976 ARRAY_SIZE(hotkey_mask_attributes));
977 }
978
979 /* Not all thinkpads have a hardware radio switch */
980 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
981 tp_features.hotkey_wlsw = 1;
982 printk(IBM_INFO
983 "radio switch found; radios are %s\n",
984 enabled(status, 0));
985 res = add_to_attr_set(hotkey_dev_attributes,
986 &dev_attr_hotkey_radio_sw.attr);
987 }
988
989 if (!res)
990 res = register_attr_set_with_sysfs(
991 hotkey_dev_attributes,
992 &tpacpi_pdev->dev.kobj);
993 if (res)
994 return res;
995
996 #ifndef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
997 for (i = 0; i < 12; i++)
998 hotkey_keycode_map[i] = KEY_UNKNOWN;
999 #endif /* ! CONFIG_THINKPAD_ACPI_INPUT_ENABLED */
1000
1001 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1002 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1003 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1004 tpacpi_inputdev->keycodesize = sizeof(hotkey_keycode_map[0]);
1005 tpacpi_inputdev->keycodemax = ARRAY_SIZE(hotkey_keycode_map);
1006 tpacpi_inputdev->keycode = &hotkey_keycode_map;
1007 for (i = 0; i < ARRAY_SIZE(hotkey_keycode_map); i++) {
1008 if (hotkey_keycode_map[i] != KEY_RESERVED) {
1009 set_bit(hotkey_keycode_map[i],
1010 tpacpi_inputdev->keybit);
1011 } else {
1012 if (i < sizeof(hotkey_reserved_mask)*8)
1013 hotkey_reserved_mask |= 1 << i;
1014 }
1015 }
1016
1017 if (tp_features.hotkey_wlsw) {
1018 set_bit(EV_SW, tpacpi_inputdev->evbit);
1019 set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1020 }
1021
1022 #ifdef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
1023 dbg_printk(TPACPI_DBG_INIT,
1024 "enabling hot key handling\n");
1025 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1026 | hotkey_orig_mask);
1027 if (res)
1028 return res;
1029 #endif /* CONFIG_THINKPAD_ACPI_INPUT_ENABLED */
1030 }
1031
1032 return (tp_features.hotkey)? 0 : 1;
1033 }
1034
1035 static void hotkey_exit(void)
1036 {
1037 int res;
1038
1039 if (tp_features.hotkey) {
1040 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1041 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1042 if (res)
1043 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1044 }
1045
1046 if (hotkey_dev_attributes) {
1047 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1048 hotkey_dev_attributes = NULL;
1049 }
1050 }
1051
1052 static void tpacpi_input_send_key(unsigned int scancode,
1053 unsigned int keycode)
1054 {
1055 if (keycode != KEY_RESERVED) {
1056 input_report_key(tpacpi_inputdev, keycode, 1);
1057 if (keycode == KEY_UNKNOWN)
1058 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1059 scancode);
1060 input_sync(tpacpi_inputdev);
1061
1062 input_report_key(tpacpi_inputdev, keycode, 0);
1063 if (keycode == KEY_UNKNOWN)
1064 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1065 scancode);
1066 input_sync(tpacpi_inputdev);
1067 }
1068 }
1069
1070 static void tpacpi_input_send_radiosw(void)
1071 {
1072 int wlsw;
1073
1074 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw))
1075 input_report_switch(tpacpi_inputdev,
1076 SW_RADIO, !!wlsw);
1077 }
1078
1079 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1080 {
1081 u32 hkey;
1082 unsigned int keycode, scancode;
1083 int sendacpi = 1;
1084
1085 if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1086 if (tpacpi_inputdev->users > 0) {
1087 switch (hkey >> 12) {
1088 case 1:
1089 /* 0x1000-0x1FFF: key presses */
1090 scancode = hkey & 0xfff;
1091 if (scancode > 0 && scancode < 0x21) {
1092 scancode--;
1093 keycode = hotkey_keycode_map[scancode];
1094 tpacpi_input_send_key(scancode, keycode);
1095 sendacpi = (keycode == KEY_RESERVED
1096 || keycode == KEY_UNKNOWN);
1097 } else {
1098 printk(IBM_ERR
1099 "hotkey 0x%04x out of range for keyboard map\n",
1100 hkey);
1101 }
1102 break;
1103 case 5:
1104 /* 0x5000-0x5FFF: LID */
1105 /* we don't handle it through this path, just
1106 * eat up known LID events */
1107 if (hkey != 0x5001 && hkey != 0x5002) {
1108 printk(IBM_ERR
1109 "unknown LID-related hotkey event: 0x%04x\n",
1110 hkey);
1111 }
1112 break;
1113 case 7:
1114 /* 0x7000-0x7FFF: misc */
1115 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1116 tpacpi_input_send_radiosw();
1117 sendacpi = 0;
1118 break;
1119 }
1120 /* fallthrough to default */
1121 default:
1122 /* case 2: dock-related */
1123 /* 0x2305 - T43 waking up due to bay lever eject while aslept */
1124 /* case 3: ultra-bay related. maybe bay in dock? */
1125 /* 0x3003 - T43 after wake up by bay lever eject (0x2305) */
1126 printk(IBM_NOTICE "unhandled hotkey event 0x%04x\n", hkey);
1127 }
1128 }
1129
1130 if (sendacpi)
1131 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
1132 } else {
1133 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
1134 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1135 }
1136 }
1137
1138 static void hotkey_resume(void)
1139 {
1140 tpacpi_input_send_radiosw();
1141 }
1142
1143 /*
1144 * Call with hotkey_mutex held
1145 */
1146 static int hotkey_get(int *status, u32 *mask)
1147 {
1148 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1149 return -EIO;
1150
1151 if (tp_features.hotkey_mask)
1152 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1153 return -EIO;
1154
1155 return 0;
1156 }
1157
1158 /*
1159 * Call with hotkey_mutex held
1160 */
1161 static int hotkey_set(int status, u32 mask)
1162 {
1163 int i;
1164
1165 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1166 return -EIO;
1167
1168 if (tp_features.hotkey_mask)
1169 for (i = 0; i < 32; i++) {
1170 int bit = ((1 << i) & mask) != 0;
1171 if (!acpi_evalf(hkey_handle,
1172 NULL, "MHKM", "vdd", i + 1, bit))
1173 return -EIO;
1174 }
1175
1176 return 0;
1177 }
1178
1179 /* procfs -------------------------------------------------------------- */
1180 static int hotkey_read(char *p)
1181 {
1182 int res, status;
1183 u32 mask;
1184 int len = 0;
1185
1186 if (!tp_features.hotkey) {
1187 len += sprintf(p + len, "status:\t\tnot supported\n");
1188 return len;
1189 }
1190
1191 res = mutex_lock_interruptible(&hotkey_mutex);
1192 if (res < 0)
1193 return res;
1194 res = hotkey_get(&status, &mask);
1195 mutex_unlock(&hotkey_mutex);
1196 if (res)
1197 return res;
1198
1199 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1200 if (tp_features.hotkey_mask) {
1201 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1202 len += sprintf(p + len,
1203 "commands:\tenable, disable, reset, <mask>\n");
1204 } else {
1205 len += sprintf(p + len, "mask:\t\tnot supported\n");
1206 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1207 }
1208
1209 return len;
1210 }
1211
1212 static int hotkey_write(char *buf)
1213 {
1214 int res, status;
1215 u32 mask;
1216 char *cmd;
1217 int do_cmd = 0;
1218
1219 if (!tp_features.hotkey)
1220 return -ENODEV;
1221
1222 res = mutex_lock_interruptible(&hotkey_mutex);
1223 if (res < 0)
1224 return res;
1225
1226 res = hotkey_get(&status, &mask);
1227 if (res)
1228 goto errexit;
1229
1230 res = 0;
1231 while ((cmd = next_cmd(&buf))) {
1232 if (strlencmp(cmd, "enable") == 0) {
1233 status = 1;
1234 } else if (strlencmp(cmd, "disable") == 0) {
1235 status = 0;
1236 } else if (strlencmp(cmd, "reset") == 0) {
1237 status = hotkey_orig_status;
1238 mask = hotkey_orig_mask;
1239 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1240 /* mask set */
1241 } else if (sscanf(cmd, "%x", &mask) == 1) {
1242 /* mask set */
1243 } else {
1244 res = -EINVAL;
1245 goto errexit;
1246 }
1247 do_cmd = 1;
1248 }
1249
1250 if (do_cmd)
1251 res = hotkey_set(status, mask);
1252
1253 errexit:
1254 mutex_unlock(&hotkey_mutex);
1255 return res;
1256 }
1257
1258 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1259 .hid = IBM_HKEY_HID,
1260 .notify = hotkey_notify,
1261 .handle = &hkey_handle,
1262 .type = ACPI_DEVICE_NOTIFY,
1263 };
1264
1265 static struct ibm_struct hotkey_driver_data = {
1266 .name = "hotkey",
1267 .read = hotkey_read,
1268 .write = hotkey_write,
1269 .exit = hotkey_exit,
1270 .resume = hotkey_resume,
1271 .acpi = &ibm_hotkey_acpidriver,
1272 };
1273
1274 /*************************************************************************
1275 * Bluetooth subdriver
1276 */
1277
1278 /* sysfs bluetooth enable ---------------------------------------------- */
1279 static ssize_t bluetooth_enable_show(struct device *dev,
1280 struct device_attribute *attr,
1281 char *buf)
1282 {
1283 int status;
1284
1285 status = bluetooth_get_radiosw();
1286 if (status < 0)
1287 return status;
1288
1289 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1290 }
1291
1292 static ssize_t bluetooth_enable_store(struct device *dev,
1293 struct device_attribute *attr,
1294 const char *buf, size_t count)
1295 {
1296 unsigned long t;
1297 int res;
1298
1299 if (parse_strtoul(buf, 1, &t))
1300 return -EINVAL;
1301
1302 res = bluetooth_set_radiosw(t);
1303
1304 return (res) ? res : count;
1305 }
1306
1307 static struct device_attribute dev_attr_bluetooth_enable =
1308 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1309 bluetooth_enable_show, bluetooth_enable_store);
1310
1311 /* --------------------------------------------------------------------- */
1312
1313 static struct attribute *bluetooth_attributes[] = {
1314 &dev_attr_bluetooth_enable.attr,
1315 NULL
1316 };
1317
1318 static const struct attribute_group bluetooth_attr_group = {
1319 .attrs = bluetooth_attributes,
1320 };
1321
1322 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1323 {
1324 int res;
1325 int status = 0;
1326
1327 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1328
1329 IBM_ACPIHANDLE_INIT(hkey);
1330
1331 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1332 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1333 tp_features.bluetooth = hkey_handle &&
1334 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1335
1336 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1337 str_supported(tp_features.bluetooth),
1338 status);
1339
1340 if (tp_features.bluetooth) {
1341 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1342 /* no bluetooth hardware present in system */
1343 tp_features.bluetooth = 0;
1344 dbg_printk(TPACPI_DBG_INIT,
1345 "bluetooth hardware not installed\n");
1346 } else {
1347 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1348 &bluetooth_attr_group);
1349 if (res)
1350 return res;
1351 }
1352 }
1353
1354 return (tp_features.bluetooth)? 0 : 1;
1355 }
1356
1357 static void bluetooth_exit(void)
1358 {
1359 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1360 &bluetooth_attr_group);
1361 }
1362
1363 static int bluetooth_get_radiosw(void)
1364 {
1365 int status;
1366
1367 if (!tp_features.bluetooth)
1368 return -ENODEV;
1369
1370 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1371 return -EIO;
1372
1373 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1374 }
1375
1376 static int bluetooth_set_radiosw(int radio_on)
1377 {
1378 int status;
1379
1380 if (!tp_features.bluetooth)
1381 return -ENODEV;
1382
1383 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1384 return -EIO;
1385 if (radio_on)
1386 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1387 else
1388 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1389 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1390 return -EIO;
1391
1392 return 0;
1393 }
1394
1395 /* procfs -------------------------------------------------------------- */
1396 static int bluetooth_read(char *p)
1397 {
1398 int len = 0;
1399 int status = bluetooth_get_radiosw();
1400
1401 if (!tp_features.bluetooth)
1402 len += sprintf(p + len, "status:\t\tnot supported\n");
1403 else {
1404 len += sprintf(p + len, "status:\t\t%s\n",
1405 (status)? "enabled" : "disabled");
1406 len += sprintf(p + len, "commands:\tenable, disable\n");
1407 }
1408
1409 return len;
1410 }
1411
1412 static int bluetooth_write(char *buf)
1413 {
1414 char *cmd;
1415
1416 if (!tp_features.bluetooth)
1417 return -ENODEV;
1418
1419 while ((cmd = next_cmd(&buf))) {
1420 if (strlencmp(cmd, "enable") == 0) {
1421 bluetooth_set_radiosw(1);
1422 } else if (strlencmp(cmd, "disable") == 0) {
1423 bluetooth_set_radiosw(0);
1424 } else
1425 return -EINVAL;
1426 }
1427
1428 return 0;
1429 }
1430
1431 static struct ibm_struct bluetooth_driver_data = {
1432 .name = "bluetooth",
1433 .read = bluetooth_read,
1434 .write = bluetooth_write,
1435 .exit = bluetooth_exit,
1436 };
1437
1438 /*************************************************************************
1439 * Wan subdriver
1440 */
1441
1442 /* sysfs wan enable ---------------------------------------------------- */
1443 static ssize_t wan_enable_show(struct device *dev,
1444 struct device_attribute *attr,
1445 char *buf)
1446 {
1447 int status;
1448
1449 status = wan_get_radiosw();
1450 if (status < 0)
1451 return status;
1452
1453 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1454 }
1455
1456 static ssize_t wan_enable_store(struct device *dev,
1457 struct device_attribute *attr,
1458 const char *buf, size_t count)
1459 {
1460 unsigned long t;
1461 int res;
1462
1463 if (parse_strtoul(buf, 1, &t))
1464 return -EINVAL;
1465
1466 res = wan_set_radiosw(t);
1467
1468 return (res) ? res : count;
1469 }
1470
1471 static struct device_attribute dev_attr_wan_enable =
1472 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1473 wan_enable_show, wan_enable_store);
1474
1475 /* --------------------------------------------------------------------- */
1476
1477 static struct attribute *wan_attributes[] = {
1478 &dev_attr_wan_enable.attr,
1479 NULL
1480 };
1481
1482 static const struct attribute_group wan_attr_group = {
1483 .attrs = wan_attributes,
1484 };
1485
1486 static int __init wan_init(struct ibm_init_struct *iibm)
1487 {
1488 int res;
1489 int status = 0;
1490
1491 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1492
1493 IBM_ACPIHANDLE_INIT(hkey);
1494
1495 tp_features.wan = hkey_handle &&
1496 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1497
1498 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1499 str_supported(tp_features.wan),
1500 status);
1501
1502 if (tp_features.wan) {
1503 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1504 /* no wan hardware present in system */
1505 tp_features.wan = 0;
1506 dbg_printk(TPACPI_DBG_INIT,
1507 "wan hardware not installed\n");
1508 } else {
1509 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1510 &wan_attr_group);
1511 if (res)
1512 return res;
1513 }
1514 }
1515
1516 return (tp_features.wan)? 0 : 1;
1517 }
1518
1519 static void wan_exit(void)
1520 {
1521 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1522 &wan_attr_group);
1523 }
1524
1525 static int wan_get_radiosw(void)
1526 {
1527 int status;
1528
1529 if (!tp_features.wan)
1530 return -ENODEV;
1531
1532 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1533 return -EIO;
1534
1535 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1536 }
1537
1538 static int wan_set_radiosw(int radio_on)
1539 {
1540 int status;
1541
1542 if (!tp_features.wan)
1543 return -ENODEV;
1544
1545 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1546 return -EIO;
1547 if (radio_on)
1548 status |= TP_ACPI_WANCARD_RADIOSSW;
1549 else
1550 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1551 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1552 return -EIO;
1553
1554 return 0;
1555 }
1556
1557 /* procfs -------------------------------------------------------------- */
1558 static int wan_read(char *p)
1559 {
1560 int len = 0;
1561 int status = wan_get_radiosw();
1562
1563 if (!tp_features.wan)
1564 len += sprintf(p + len, "status:\t\tnot supported\n");
1565 else {
1566 len += sprintf(p + len, "status:\t\t%s\n",
1567 (status)? "enabled" : "disabled");
1568 len += sprintf(p + len, "commands:\tenable, disable\n");
1569 }
1570
1571 return len;
1572 }
1573
1574 static int wan_write(char *buf)
1575 {
1576 char *cmd;
1577
1578 if (!tp_features.wan)
1579 return -ENODEV;
1580
1581 while ((cmd = next_cmd(&buf))) {
1582 if (strlencmp(cmd, "enable") == 0) {
1583 wan_set_radiosw(1);
1584 } else if (strlencmp(cmd, "disable") == 0) {
1585 wan_set_radiosw(0);
1586 } else
1587 return -EINVAL;
1588 }
1589
1590 return 0;
1591 }
1592
1593 static struct ibm_struct wan_driver_data = {
1594 .name = "wan",
1595 .read = wan_read,
1596 .write = wan_write,
1597 .exit = wan_exit,
1598 .flags.experimental = 1,
1599 };
1600
1601 /*************************************************************************
1602 * Video subdriver
1603 */
1604
1605 static enum video_access_mode video_supported;
1606 static int video_orig_autosw;
1607
1608 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1609 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1610 "\\_SB.PCI0.VID0", /* 770e */
1611 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1612 "\\_SB.PCI0.AGP.VID", /* all others */
1613 ); /* R30, R31 */
1614
1615 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1616
1617 static int __init video_init(struct ibm_init_struct *iibm)
1618 {
1619 int ivga;
1620
1621 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1622
1623 IBM_ACPIHANDLE_INIT(vid);
1624 IBM_ACPIHANDLE_INIT(vid2);
1625
1626 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1627 /* G41, assume IVGA doesn't change */
1628 vid_handle = vid2_handle;
1629
1630 if (!vid_handle)
1631 /* video switching not supported on R30, R31 */
1632 video_supported = TPACPI_VIDEO_NONE;
1633 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1634 /* 570 */
1635 video_supported = TPACPI_VIDEO_570;
1636 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1637 /* 600e/x, 770e, 770x */
1638 video_supported = TPACPI_VIDEO_770;
1639 else
1640 /* all others */
1641 video_supported = TPACPI_VIDEO_NEW;
1642
1643 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1644 str_supported(video_supported != TPACPI_VIDEO_NONE),
1645 video_supported);
1646
1647 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1648 }
1649
1650 static void video_exit(void)
1651 {
1652 dbg_printk(TPACPI_DBG_EXIT,
1653 "restoring original video autoswitch mode\n");
1654 if (video_autosw_set(video_orig_autosw))
1655 printk(IBM_ERR "error while trying to restore original "
1656 "video autoswitch mode\n");
1657 }
1658
1659 static int video_outputsw_get(void)
1660 {
1661 int status = 0;
1662 int i;
1663
1664 switch (video_supported) {
1665 case TPACPI_VIDEO_570:
1666 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1667 TP_ACPI_VIDEO_570_PHSCMD))
1668 return -EIO;
1669 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1670 break;
1671 case TPACPI_VIDEO_770:
1672 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1673 return -EIO;
1674 if (i)
1675 status |= TP_ACPI_VIDEO_S_LCD;
1676 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1677 return -EIO;
1678 if (i)
1679 status |= TP_ACPI_VIDEO_S_CRT;
1680 break;
1681 case TPACPI_VIDEO_NEW:
1682 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1683 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1684 return -EIO;
1685 if (i)
1686 status |= TP_ACPI_VIDEO_S_CRT;
1687
1688 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1689 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1690 return -EIO;
1691 if (i)
1692 status |= TP_ACPI_VIDEO_S_LCD;
1693 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1694 return -EIO;
1695 if (i)
1696 status |= TP_ACPI_VIDEO_S_DVI;
1697 break;
1698 default:
1699 return -ENOSYS;
1700 }
1701
1702 return status;
1703 }
1704
1705 static int video_outputsw_set(int status)
1706 {
1707 int autosw;
1708 int res = 0;
1709
1710 switch (video_supported) {
1711 case TPACPI_VIDEO_570:
1712 res = acpi_evalf(NULL, NULL,
1713 "\\_SB.PHS2", "vdd",
1714 TP_ACPI_VIDEO_570_PHS2CMD,
1715 status | TP_ACPI_VIDEO_570_PHS2SET);
1716 break;
1717 case TPACPI_VIDEO_770:
1718 autosw = video_autosw_get();
1719 if (autosw < 0)
1720 return autosw;
1721
1722 res = video_autosw_set(1);
1723 if (res)
1724 return res;
1725 res = acpi_evalf(vid_handle, NULL,
1726 "ASWT", "vdd", status * 0x100, 0);
1727 if (!autosw && video_autosw_set(autosw)) {
1728 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1729 return -EIO;
1730 }
1731 break;
1732 case TPACPI_VIDEO_NEW:
1733 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1734 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1735 break;
1736 default:
1737 return -ENOSYS;
1738 }
1739
1740 return (res)? 0 : -EIO;
1741 }
1742
1743 static int video_autosw_get(void)
1744 {
1745 int autosw = 0;
1746
1747 switch (video_supported) {
1748 case TPACPI_VIDEO_570:
1749 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1750 return -EIO;
1751 break;
1752 case TPACPI_VIDEO_770:
1753 case TPACPI_VIDEO_NEW:
1754 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1755 return -EIO;
1756 break;
1757 default:
1758 return -ENOSYS;
1759 }
1760
1761 return autosw & 1;
1762 }
1763
1764 static int video_autosw_set(int enable)
1765 {
1766 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1767 return -EIO;
1768 return 0;
1769 }
1770
1771 static int video_outputsw_cycle(void)
1772 {
1773 int autosw = video_autosw_get();
1774 int res;
1775
1776 if (autosw < 0)
1777 return autosw;
1778
1779 switch (video_supported) {
1780 case TPACPI_VIDEO_570:
1781 res = video_autosw_set(1);
1782 if (res)
1783 return res;
1784 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1785 break;
1786 case TPACPI_VIDEO_770:
1787 case TPACPI_VIDEO_NEW:
1788 res = video_autosw_set(1);
1789 if (res)
1790 return res;
1791 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1792 break;
1793 default:
1794 return -ENOSYS;
1795 }
1796 if (!autosw && video_autosw_set(autosw)) {
1797 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1798 return -EIO;
1799 }
1800
1801 return (res)? 0 : -EIO;
1802 }
1803
1804 static int video_expand_toggle(void)
1805 {
1806 switch (video_supported) {
1807 case TPACPI_VIDEO_570:
1808 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1809 0 : -EIO;
1810 case TPACPI_VIDEO_770:
1811 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1812 0 : -EIO;
1813 case TPACPI_VIDEO_NEW:
1814 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1815 0 : -EIO;
1816 default:
1817 return -ENOSYS;
1818 }
1819 /* not reached */
1820 }
1821
1822 static int video_read(char *p)
1823 {
1824 int status, autosw;
1825 int len = 0;
1826
1827 if (video_supported == TPACPI_VIDEO_NONE) {
1828 len += sprintf(p + len, "status:\t\tnot supported\n");
1829 return len;
1830 }
1831
1832 status = video_outputsw_get();
1833 if (status < 0)
1834 return status;
1835
1836 autosw = video_autosw_get();
1837 if (autosw < 0)
1838 return autosw;
1839
1840 len += sprintf(p + len, "status:\t\tsupported\n");
1841 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1842 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1843 if (video_supported == TPACPI_VIDEO_NEW)
1844 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1845 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1846 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1847 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1848 if (video_supported == TPACPI_VIDEO_NEW)
1849 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1850 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1851 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1852
1853 return len;
1854 }
1855
1856 static int video_write(char *buf)
1857 {
1858 char *cmd;
1859 int enable, disable, status;
1860 int res;
1861
1862 if (video_supported == TPACPI_VIDEO_NONE)
1863 return -ENODEV;
1864
1865 enable = 0;
1866 disable = 0;
1867
1868 while ((cmd = next_cmd(&buf))) {
1869 if (strlencmp(cmd, "lcd_enable") == 0) {
1870 enable |= TP_ACPI_VIDEO_S_LCD;
1871 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1872 disable |= TP_ACPI_VIDEO_S_LCD;
1873 } else if (strlencmp(cmd, "crt_enable") == 0) {
1874 enable |= TP_ACPI_VIDEO_S_CRT;
1875 } else if (strlencmp(cmd, "crt_disable") == 0) {
1876 disable |= TP_ACPI_VIDEO_S_CRT;
1877 } else if (video_supported == TPACPI_VIDEO_NEW &&
1878 strlencmp(cmd, "dvi_enable") == 0) {
1879 enable |= TP_ACPI_VIDEO_S_DVI;
1880 } else if (video_supported == TPACPI_VIDEO_NEW &&
1881 strlencmp(cmd, "dvi_disable") == 0) {
1882 disable |= TP_ACPI_VIDEO_S_DVI;
1883 } else if (strlencmp(cmd, "auto_enable") == 0) {
1884 res = video_autosw_set(1);
1885 if (res)
1886 return res;
1887 } else if (strlencmp(cmd, "auto_disable") == 0) {
1888 res = video_autosw_set(0);
1889 if (res)
1890 return res;
1891 } else if (strlencmp(cmd, "video_switch") == 0) {
1892 res = video_outputsw_cycle();
1893 if (res)
1894 return res;
1895 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1896 res = video_expand_toggle();
1897 if (res)
1898 return res;
1899 } else
1900 return -EINVAL;
1901 }
1902
1903 if (enable || disable) {
1904 status = video_outputsw_get();
1905 if (status < 0)
1906 return status;
1907 res = video_outputsw_set((status & ~disable) | enable);
1908 if (res)
1909 return res;
1910 }
1911
1912 return 0;
1913 }
1914
1915 static struct ibm_struct video_driver_data = {
1916 .name = "video",
1917 .read = video_read,
1918 .write = video_write,
1919 .exit = video_exit,
1920 };
1921
1922 /*************************************************************************
1923 * Light (thinklight) subdriver
1924 */
1925
1926 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1927 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1928
1929 static int __init light_init(struct ibm_init_struct *iibm)
1930 {
1931 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1932
1933 IBM_ACPIHANDLE_INIT(ledb);
1934 IBM_ACPIHANDLE_INIT(lght);
1935 IBM_ACPIHANDLE_INIT(cmos);
1936
1937 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1938 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1939
1940 if (tp_features.light)
1941 /* light status not supported on
1942 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1943 tp_features.light_status =
1944 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1945
1946 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1947 str_supported(tp_features.light));
1948
1949 return (tp_features.light)? 0 : 1;
1950 }
1951
1952 static int light_read(char *p)
1953 {
1954 int len = 0;
1955 int status = 0;
1956
1957 if (!tp_features.light) {
1958 len += sprintf(p + len, "status:\t\tnot supported\n");
1959 } else if (!tp_features.light_status) {
1960 len += sprintf(p + len, "status:\t\tunknown\n");
1961 len += sprintf(p + len, "commands:\ton, off\n");
1962 } else {
1963 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1964 return -EIO;
1965 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1966 len += sprintf(p + len, "commands:\ton, off\n");
1967 }
1968
1969 return len;
1970 }
1971
1972 static int light_write(char *buf)
1973 {
1974 int cmos_cmd, lght_cmd;
1975 char *cmd;
1976 int success;
1977
1978 if (!tp_features.light)
1979 return -ENODEV;
1980
1981 while ((cmd = next_cmd(&buf))) {
1982 if (strlencmp(cmd, "on") == 0) {
1983 cmos_cmd = 0x0c;
1984 lght_cmd = 1;
1985 } else if (strlencmp(cmd, "off") == 0) {
1986 cmos_cmd = 0x0d;
1987 lght_cmd = 0;
1988 } else
1989 return -EINVAL;
1990
1991 success = cmos_handle ?
1992 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1993 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1994 if (!success)
1995 return -EIO;
1996 }
1997
1998 return 0;
1999 }
2000
2001 static struct ibm_struct light_driver_data = {
2002 .name = "light",
2003 .read = light_read,
2004 .write = light_write,
2005 };
2006
2007 /*************************************************************************
2008 * Dock subdriver
2009 */
2010
2011 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2012
2013 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
2014 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2015 "\\_SB.PCI0.PCI1.DOCK", /* all others */
2016 "\\_SB.PCI.ISA.SLCE", /* 570 */
2017 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2018
2019 /* don't list other alternatives as we install a notify handler on the 570 */
2020 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
2021
2022 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2023 {
2024 .notify = dock_notify,
2025 .handle = &dock_handle,
2026 .type = ACPI_SYSTEM_NOTIFY,
2027 },
2028 {
2029 .hid = IBM_PCI_HID,
2030 .notify = dock_notify,
2031 .handle = &pci_handle,
2032 .type = ACPI_SYSTEM_NOTIFY,
2033 },
2034 };
2035
2036 static struct ibm_struct dock_driver_data[2] = {
2037 {
2038 .name = "dock",
2039 .read = dock_read,
2040 .write = dock_write,
2041 .acpi = &ibm_dock_acpidriver[0],
2042 },
2043 {
2044 .name = "dock",
2045 .acpi = &ibm_dock_acpidriver[1],
2046 },
2047 };
2048
2049 #define dock_docked() (_sta(dock_handle) & 1)
2050
2051 static int __init dock_init(struct ibm_init_struct *iibm)
2052 {
2053 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2054
2055 IBM_ACPIHANDLE_INIT(dock);
2056
2057 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2058 str_supported(dock_handle != NULL));
2059
2060 return (dock_handle)? 0 : 1;
2061 }
2062
2063 static int __init dock_init2(struct ibm_init_struct *iibm)
2064 {
2065 int dock2_needed;
2066
2067 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2068
2069 if (dock_driver_data[0].flags.acpi_driver_registered &&
2070 dock_driver_data[0].flags.acpi_notify_installed) {
2071 IBM_ACPIHANDLE_INIT(pci);
2072 dock2_needed = (pci_handle != NULL);
2073 vdbg_printk(TPACPI_DBG_INIT,
2074 "dock PCI handler for the TP 570 is %s\n",
2075 str_supported(dock2_needed));
2076 } else {
2077 vdbg_printk(TPACPI_DBG_INIT,
2078 "dock subdriver part 2 not required\n");
2079 dock2_needed = 0;
2080 }
2081
2082 return (dock2_needed)? 0 : 1;
2083 }
2084
2085 static void dock_notify(struct ibm_struct *ibm, u32 event)
2086 {
2087 int docked = dock_docked();
2088 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
2089
2090 if (event == 1 && !pci) /* 570 */
2091 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
2092 else if (event == 1 && pci) /* 570 */
2093 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
2094 else if (event == 3 && docked)
2095 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
2096 else if (event == 3 && !docked)
2097 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
2098 else if (event == 0 && docked)
2099 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
2100 else {
2101 printk(IBM_ERR "unknown dock event %d, status %d\n",
2102 event, _sta(dock_handle));
2103 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
2104 }
2105 }
2106
2107 static int dock_read(char *p)
2108 {
2109 int len = 0;
2110 int docked = dock_docked();
2111
2112 if (!dock_handle)
2113 len += sprintf(p + len, "status:\t\tnot supported\n");
2114 else if (!docked)
2115 len += sprintf(p + len, "status:\t\tundocked\n");
2116 else {
2117 len += sprintf(p + len, "status:\t\tdocked\n");
2118 len += sprintf(p + len, "commands:\tdock, undock\n");
2119 }
2120
2121 return len;
2122 }
2123
2124 static int dock_write(char *buf)
2125 {
2126 char *cmd;
2127
2128 if (!dock_docked())
2129 return -ENODEV;
2130
2131 while ((cmd = next_cmd(&buf))) {
2132 if (strlencmp(cmd, "undock") == 0) {
2133 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2134 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2135 return -EIO;
2136 } else if (strlencmp(cmd, "dock") == 0) {
2137 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2138 return -EIO;
2139 } else
2140 return -EINVAL;
2141 }
2142
2143 return 0;
2144 }
2145
2146 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2147
2148 /*************************************************************************
2149 * Bay subdriver
2150 */
2151
2152 #ifdef CONFIG_THINKPAD_ACPI_BAY
2153 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
2154 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2155 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2156 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2157 ); /* A21e, R30, R31 */
2158 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2159 "_EJ0", /* all others */
2160 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2161 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
2162 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2163 ); /* all others */
2164 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
2165 "_EJ0", /* 770x */
2166 ); /* all others */
2167
2168 static int __init bay_init(struct ibm_init_struct *iibm)
2169 {
2170 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2171
2172 IBM_ACPIHANDLE_INIT(bay);
2173 if (bay_handle)
2174 IBM_ACPIHANDLE_INIT(bay_ej);
2175 IBM_ACPIHANDLE_INIT(bay2);
2176 if (bay2_handle)
2177 IBM_ACPIHANDLE_INIT(bay2_ej);
2178
2179 tp_features.bay_status = bay_handle &&
2180 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2181 tp_features.bay_status2 = bay2_handle &&
2182 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2183
2184 tp_features.bay_eject = bay_handle && bay_ej_handle &&
2185 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2186 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2187 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2188
2189 vdbg_printk(TPACPI_DBG_INIT,
2190 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2191 str_supported(tp_features.bay_status),
2192 str_supported(tp_features.bay_eject),
2193 str_supported(tp_features.bay_status2),
2194 str_supported(tp_features.bay_eject2));
2195
2196 return (tp_features.bay_status || tp_features.bay_eject ||
2197 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2198 }
2199
2200 static void bay_notify(struct ibm_struct *ibm, u32 event)
2201 {
2202 acpi_bus_generate_event(ibm->acpi->device, event, 0);
2203 }
2204
2205 #define bay_occupied(b) (_sta(b##_handle) & 1)
2206
2207 static int bay_read(char *p)
2208 {
2209 int len = 0;
2210 int occupied = bay_occupied(bay);
2211 int occupied2 = bay_occupied(bay2);
2212 int eject, eject2;
2213
2214 len += sprintf(p + len, "status:\t\t%s\n",
2215 tp_features.bay_status ?
2216 (occupied ? "occupied" : "unoccupied") :
2217 "not supported");
2218 if (tp_features.bay_status2)
2219 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2220 "occupied" : "unoccupied");
2221
2222 eject = tp_features.bay_eject && occupied;
2223 eject2 = tp_features.bay_eject2 && occupied2;
2224
2225 if (eject && eject2)
2226 len += sprintf(p + len, "commands:\teject, eject2\n");
2227 else if (eject)
2228 len += sprintf(p + len, "commands:\teject\n");
2229 else if (eject2)
2230 len += sprintf(p + len, "commands:\teject2\n");
2231
2232 return len;
2233 }
2234
2235 static int bay_write(char *buf)
2236 {
2237 char *cmd;
2238
2239 if (!tp_features.bay_eject && !tp_features.bay_eject2)
2240 return -ENODEV;
2241
2242 while ((cmd = next_cmd(&buf))) {
2243 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2244 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2245 return -EIO;
2246 } else if (tp_features.bay_eject2 &&
2247 strlencmp(cmd, "eject2") == 0) {
2248 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2249 return -EIO;
2250 } else
2251 return -EINVAL;
2252 }
2253
2254 return 0;
2255 }
2256
2257 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2258 .notify = bay_notify,
2259 .handle = &bay_handle,
2260 .type = ACPI_SYSTEM_NOTIFY,
2261 };
2262
2263 static struct ibm_struct bay_driver_data = {
2264 .name = "bay",
2265 .read = bay_read,
2266 .write = bay_write,
2267 .acpi = &ibm_bay_acpidriver,
2268 };
2269
2270 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2271
2272 /*************************************************************************
2273 * CMOS subdriver
2274 */
2275
2276 /* sysfs cmos_command -------------------------------------------------- */
2277 static ssize_t cmos_command_store(struct device *dev,
2278 struct device_attribute *attr,
2279 const char *buf, size_t count)
2280 {
2281 unsigned long cmos_cmd;
2282 int res;
2283
2284 if (parse_strtoul(buf, 21, &cmos_cmd))
2285 return -EINVAL;
2286
2287 res = issue_thinkpad_cmos_command(cmos_cmd);
2288 return (res)? res : count;
2289 }
2290
2291 static struct device_attribute dev_attr_cmos_command =
2292 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2293
2294 /* --------------------------------------------------------------------- */
2295
2296 static int __init cmos_init(struct ibm_init_struct *iibm)
2297 {
2298 int res;
2299
2300 vdbg_printk(TPACPI_DBG_INIT,
2301 "initializing cmos commands subdriver\n");
2302
2303 IBM_ACPIHANDLE_INIT(cmos);
2304
2305 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2306 str_supported(cmos_handle != NULL));
2307
2308 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2309 if (res)
2310 return res;
2311
2312 return (cmos_handle)? 0 : 1;
2313 }
2314
2315 static void cmos_exit(void)
2316 {
2317 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2318 }
2319
2320 static int cmos_read(char *p)
2321 {
2322 int len = 0;
2323
2324 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2325 R30, R31, T20-22, X20-21 */
2326 if (!cmos_handle)
2327 len += sprintf(p + len, "status:\t\tnot supported\n");
2328 else {
2329 len += sprintf(p + len, "status:\t\tsupported\n");
2330 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2331 }
2332
2333 return len;
2334 }
2335
2336 static int cmos_write(char *buf)
2337 {
2338 char *cmd;
2339 int cmos_cmd, res;
2340
2341 while ((cmd = next_cmd(&buf))) {
2342 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2343 cmos_cmd >= 0 && cmos_cmd <= 21) {
2344 /* cmos_cmd set */
2345 } else
2346 return -EINVAL;
2347
2348 res = issue_thinkpad_cmos_command(cmos_cmd);
2349 if (res)
2350 return res;
2351 }
2352
2353 return 0;
2354 }
2355
2356 static struct ibm_struct cmos_driver_data = {
2357 .name = "cmos",
2358 .read = cmos_read,
2359 .write = cmos_write,
2360 .exit = cmos_exit,
2361 };
2362
2363 /*************************************************************************
2364 * LED subdriver
2365 */
2366
2367 static enum led_access_mode led_supported;
2368
2369 IBM_HANDLE(led, ec, "SLED", /* 570 */
2370 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2371 "LED", /* all others */
2372 ); /* R30, R31 */
2373
2374 static int __init led_init(struct ibm_init_struct *iibm)
2375 {
2376 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2377
2378 IBM_ACPIHANDLE_INIT(led);
2379
2380 if (!led_handle)
2381 /* led not supported on R30, R31 */
2382 led_supported = TPACPI_LED_NONE;
2383 else if (strlencmp(led_path, "SLED") == 0)
2384 /* 570 */
2385 led_supported = TPACPI_LED_570;
2386 else if (strlencmp(led_path, "SYSL") == 0)
2387 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2388 led_supported = TPACPI_LED_OLD;
2389 else
2390 /* all others */
2391 led_supported = TPACPI_LED_NEW;
2392
2393 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2394 str_supported(led_supported), led_supported);
2395
2396 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2397 }
2398
2399 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2400
2401 static int led_read(char *p)
2402 {
2403 int len = 0;
2404
2405 if (!led_supported) {
2406 len += sprintf(p + len, "status:\t\tnot supported\n");
2407 return len;
2408 }
2409 len += sprintf(p + len, "status:\t\tsupported\n");
2410
2411 if (led_supported == TPACPI_LED_570) {
2412 /* 570 */
2413 int i, status;
2414 for (i = 0; i < 8; i++) {
2415 if (!acpi_evalf(ec_handle,
2416 &status, "GLED", "dd", 1 << i))
2417 return -EIO;
2418 len += sprintf(p + len, "%d:\t\t%s\n",
2419 i, led_status(status));
2420 }
2421 }
2422
2423 len += sprintf(p + len, "commands:\t"
2424 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2425
2426 return len;
2427 }
2428
2429 /* off, on, blink */
2430 static const int led_sled_arg1[] = { 0, 1, 3 };
2431 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
2432 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
2433 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2434
2435 static int led_write(char *buf)
2436 {
2437 char *cmd;
2438 int led, ind, ret;
2439
2440 if (!led_supported)
2441 return -ENODEV;
2442
2443 while ((cmd = next_cmd(&buf))) {
2444 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2445 return -EINVAL;
2446
2447 if (strstr(cmd, "off")) {
2448 ind = 0;
2449 } else if (strstr(cmd, "on")) {
2450 ind = 1;
2451 } else if (strstr(cmd, "blink")) {
2452 ind = 2;
2453 } else
2454 return -EINVAL;
2455
2456 if (led_supported == TPACPI_LED_570) {
2457 /* 570 */
2458 led = 1 << led;
2459 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2460 led, led_sled_arg1[ind]))
2461 return -EIO;
2462 } else if (led_supported == TPACPI_LED_OLD) {
2463 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2464 led = 1 << led;
2465 ret = ec_write(TPACPI_LED_EC_HLMS, led);
2466 if (ret >= 0)
2467 ret =
2468 ec_write(TPACPI_LED_EC_HLBL,
2469 led * led_exp_hlbl[ind]);
2470 if (ret >= 0)
2471 ret =
2472 ec_write(TPACPI_LED_EC_HLCL,
2473 led * led_exp_hlcl[ind]);
2474 if (ret < 0)
2475 return ret;
2476 } else {
2477 /* all others */
2478 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2479 led, led_led_arg1[ind]))
2480 return -EIO;
2481 }
2482 }
2483
2484 return 0;
2485 }
2486
2487 static struct ibm_struct led_driver_data = {
2488 .name = "led",
2489 .read = led_read,
2490 .write = led_write,
2491 };
2492
2493 /*************************************************************************
2494 * Beep subdriver
2495 */
2496
2497 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
2498
2499 static int __init beep_init(struct ibm_init_struct *iibm)
2500 {
2501 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2502
2503 IBM_ACPIHANDLE_INIT(beep);
2504
2505 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2506 str_supported(beep_handle != NULL));
2507
2508 return (beep_handle)? 0 : 1;
2509 }
2510
2511 static int beep_read(char *p)
2512 {
2513 int len = 0;
2514
2515 if (!beep_handle)
2516 len += sprintf(p + len, "status:\t\tnot supported\n");
2517 else {
2518 len += sprintf(p + len, "status:\t\tsupported\n");
2519 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2520 }
2521
2522 return len;
2523 }
2524
2525 static int beep_write(char *buf)
2526 {
2527 char *cmd;
2528 int beep_cmd;
2529
2530 if (!beep_handle)
2531 return -ENODEV;
2532
2533 while ((cmd = next_cmd(&buf))) {
2534 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2535 beep_cmd >= 0 && beep_cmd <= 17) {
2536 /* beep_cmd set */
2537 } else
2538 return -EINVAL;
2539 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2540 return -EIO;
2541 }
2542
2543 return 0;
2544 }
2545
2546 static struct ibm_struct beep_driver_data = {
2547 .name = "beep",
2548 .read = beep_read,
2549 .write = beep_write,
2550 };
2551
2552 /*************************************************************************
2553 * Thermal subdriver
2554 */
2555
2556 static enum thermal_access_mode thermal_read_mode;
2557
2558 /* sysfs temp##_input -------------------------------------------------- */
2559
2560 static ssize_t thermal_temp_input_show(struct device *dev,
2561 struct device_attribute *attr,
2562 char *buf)
2563 {
2564 struct sensor_device_attribute *sensor_attr =
2565 to_sensor_dev_attr(attr);
2566 int idx = sensor_attr->index;
2567 s32 value;
2568 int res;
2569
2570 res = thermal_get_sensor(idx, &value);
2571 if (res)
2572 return res;
2573 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2574 return -ENXIO;
2575
2576 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2577 }
2578
2579 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2580 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2581
2582 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2583 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2584 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2585 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2586 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2587 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2588 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2589 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2590 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2591 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2592 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2593 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2594 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2595 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2596 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2597 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2598 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2599 };
2600
2601 #define THERMAL_ATTRS(X) \
2602 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2603
2604 static struct attribute *thermal_temp_input_attr[] = {
2605 THERMAL_ATTRS(8),
2606 THERMAL_ATTRS(9),
2607 THERMAL_ATTRS(10),
2608 THERMAL_ATTRS(11),
2609 THERMAL_ATTRS(12),
2610 THERMAL_ATTRS(13),
2611 THERMAL_ATTRS(14),
2612 THERMAL_ATTRS(15),
2613 THERMAL_ATTRS(0),
2614 THERMAL_ATTRS(1),
2615 THERMAL_ATTRS(2),
2616 THERMAL_ATTRS(3),
2617 THERMAL_ATTRS(4),
2618 THERMAL_ATTRS(5),
2619 THERMAL_ATTRS(6),
2620 THERMAL_ATTRS(7),
2621 NULL
2622 };
2623
2624 static const struct attribute_group thermal_temp_input16_group = {
2625 .attrs = thermal_temp_input_attr
2626 };
2627
2628 static const struct attribute_group thermal_temp_input8_group = {
2629 .attrs = &thermal_temp_input_attr[8]
2630 };
2631
2632 #undef THERMAL_SENSOR_ATTR_TEMP
2633 #undef THERMAL_ATTRS
2634
2635 /* --------------------------------------------------------------------- */
2636
2637 static int __init thermal_init(struct ibm_init_struct *iibm)
2638 {
2639 u8 t, ta1, ta2;
2640 int i;
2641 int acpi_tmp7;
2642 int res;
2643
2644 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2645
2646 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2647
2648 if (ibm_thinkpad_ec_found && experimental) {
2649 /*
2650 * Direct EC access mode: sensors at registers
2651 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2652 * non-implemented, thermal sensors return 0x80 when
2653 * not available
2654 */
2655
2656 ta1 = ta2 = 0;
2657 for (i = 0; i < 8; i++) {
2658 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2659 ta1 |= t;
2660 } else {
2661 ta1 = 0;
2662 break;
2663 }
2664 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2665 ta2 |= t;
2666 } else {
2667 ta1 = 0;
2668 break;
2669 }
2670 }
2671 if (ta1 == 0) {
2672 /* This is sheer paranoia, but we handle it anyway */
2673 if (acpi_tmp7) {
2674 printk(IBM_ERR
2675 "ThinkPad ACPI EC access misbehaving, "
2676 "falling back to ACPI TMPx access mode\n");
2677 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2678 } else {
2679 printk(IBM_ERR
2680 "ThinkPad ACPI EC access misbehaving, "
2681 "disabling thermal sensors access\n");
2682 thermal_read_mode = TPACPI_THERMAL_NONE;
2683 }
2684 } else {
2685 thermal_read_mode =
2686 (ta2 != 0) ?
2687 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2688 }
2689 } else if (acpi_tmp7) {
2690 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2691 /* 600e/x, 770e, 770x */
2692 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2693 } else {
2694 /* Standard ACPI TMPx access, max 8 sensors */
2695 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2696 }
2697 } else {
2698 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2699 thermal_read_mode = TPACPI_THERMAL_NONE;
2700 }
2701
2702 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2703 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2704 thermal_read_mode);
2705
2706 switch(thermal_read_mode) {
2707 case TPACPI_THERMAL_TPEC_16:
2708 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2709 &thermal_temp_input16_group);
2710 if (res)
2711 return res;
2712 break;
2713 case TPACPI_THERMAL_TPEC_8:
2714 case TPACPI_THERMAL_ACPI_TMP07:
2715 case TPACPI_THERMAL_ACPI_UPDT:
2716 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2717 &thermal_temp_input8_group);
2718 if (res)
2719 return res;
2720 break;
2721 case TPACPI_THERMAL_NONE:
2722 default:
2723 return 1;
2724 }
2725
2726 return 0;
2727 }
2728
2729 static void thermal_exit(void)
2730 {
2731 switch(thermal_read_mode) {
2732 case TPACPI_THERMAL_TPEC_16:
2733 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2734 &thermal_temp_input16_group);
2735 break;
2736 case TPACPI_THERMAL_TPEC_8:
2737 case TPACPI_THERMAL_ACPI_TMP07:
2738 case TPACPI_THERMAL_ACPI_UPDT:
2739 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2740 &thermal_temp_input16_group);
2741 break;
2742 case TPACPI_THERMAL_NONE:
2743 default:
2744 break;
2745 }
2746 }
2747
2748 /* idx is zero-based */
2749 static int thermal_get_sensor(int idx, s32 *value)
2750 {
2751 int t;
2752 s8 tmp;
2753 char tmpi[5];
2754
2755 t = TP_EC_THERMAL_TMP0;
2756
2757 switch (thermal_read_mode) {
2758 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2759 case TPACPI_THERMAL_TPEC_16:
2760 if (idx >= 8 && idx <= 15) {
2761 t = TP_EC_THERMAL_TMP8;
2762 idx -= 8;
2763 }
2764 /* fallthrough */
2765 #endif
2766 case TPACPI_THERMAL_TPEC_8:
2767 if (idx <= 7) {
2768 if (!acpi_ec_read(t + idx, &tmp))
2769 return -EIO;
2770 *value = tmp * 1000;
2771 return 0;
2772 }
2773 break;
2774
2775 case TPACPI_THERMAL_ACPI_UPDT:
2776 if (idx <= 7) {
2777 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2778 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2779 return -EIO;
2780 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2781 return -EIO;
2782 *value = (t - 2732) * 100;
2783 return 0;
2784 }
2785 break;
2786
2787 case TPACPI_THERMAL_ACPI_TMP07:
2788 if (idx <= 7) {
2789 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2790 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2791 return -EIO;
2792 *value = t * 1000;
2793 return 0;
2794 }
2795 break;
2796
2797 case TPACPI_THERMAL_NONE:
2798 default:
2799 return -ENOSYS;
2800 }
2801
2802 return -EINVAL;
2803 }
2804
2805 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2806 {
2807 int res, i;
2808 int n;
2809
2810 n = 8;
2811 i = 0;
2812
2813 if (!s)
2814 return -EINVAL;
2815
2816 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2817 n = 16;
2818
2819 for(i = 0 ; i < n; i++) {
2820 res = thermal_get_sensor(i, &s->temp[i]);
2821 if (res)
2822 return res;
2823 }
2824
2825 return n;
2826 }
2827
2828 static int thermal_read(char *p)
2829 {
2830 int len = 0;
2831 int n, i;
2832 struct ibm_thermal_sensors_struct t;
2833
2834 n = thermal_get_sensors(&t);
2835 if (unlikely(n < 0))
2836 return n;
2837
2838 len += sprintf(p + len, "temperatures:\t");
2839
2840 if (n > 0) {
2841 for (i = 0; i < (n - 1); i++)
2842 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2843 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2844 } else
2845 len += sprintf(p + len, "not supported\n");
2846
2847 return len;
2848 }
2849
2850 static struct ibm_struct thermal_driver_data = {
2851 .name = "thermal",
2852 .read = thermal_read,
2853 .exit = thermal_exit,
2854 };
2855
2856 /*************************************************************************
2857 * EC Dump subdriver
2858 */
2859
2860 static u8 ecdump_regs[256];
2861
2862 static int ecdump_read(char *p)
2863 {
2864 int len = 0;
2865 int i, j;
2866 u8 v;
2867
2868 len += sprintf(p + len, "EC "
2869 " +00 +01 +02 +03 +04 +05 +06 +07"
2870 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2871 for (i = 0; i < 256; i += 16) {
2872 len += sprintf(p + len, "EC 0x%02x:", i);
2873 for (j = 0; j < 16; j++) {
2874 if (!acpi_ec_read(i + j, &v))
2875 break;
2876 if (v != ecdump_regs[i + j])
2877 len += sprintf(p + len, " *%02x", v);
2878 else
2879 len += sprintf(p + len, " %02x", v);
2880 ecdump_regs[i + j] = v;
2881 }
2882 len += sprintf(p + len, "\n");
2883 if (j != 16)
2884 break;
2885 }
2886
2887 /* These are way too dangerous to advertise openly... */
2888 #if 0
2889 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2890 " (<offset> is 00-ff, <value> is 00-ff)\n");
2891 len += sprintf(p + len, "commands:\t0x<offset> <value> "
2892 " (<offset> is 00-ff, <value> is 0-255)\n");
2893 #endif
2894 return len;
2895 }
2896
2897 static int ecdump_write(char *buf)
2898 {
2899 char *cmd;
2900 int i, v;
2901
2902 while ((cmd = next_cmd(&buf))) {
2903 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2904 /* i and v set */
2905 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2906 /* i and v set */
2907 } else
2908 return -EINVAL;
2909 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2910 if (!acpi_ec_write(i, v))
2911 return -EIO;
2912 } else
2913 return -EINVAL;
2914 }
2915
2916 return 0;
2917 }
2918
2919 static struct ibm_struct ecdump_driver_data = {
2920 .name = "ecdump",
2921 .read = ecdump_read,
2922 .write = ecdump_write,
2923 .flags.experimental = 1,
2924 };
2925
2926 /*************************************************************************
2927 * Backlight/brightness subdriver
2928 */
2929
2930 static struct backlight_device *ibm_backlight_device;
2931
2932 static struct backlight_properties ibm_backlight_data = {
2933 .owner = THIS_MODULE,
2934 .get_brightness = brightness_get,
2935 .update_status = brightness_update_status,
2936 .max_brightness = 7,
2937 };
2938
2939 static int __init brightness_init(struct ibm_init_struct *iibm)
2940 {
2941 int b;
2942
2943 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2944
2945 b = brightness_get(NULL);
2946 if (b < 0)
2947 return b;
2948
2949 ibm_backlight_device = backlight_device_register(
2950 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2951 &ibm_backlight_data);
2952 if (IS_ERR(ibm_backlight_device)) {
2953 printk(IBM_ERR "Could not register backlight device\n");
2954 return PTR_ERR(ibm_backlight_device);
2955 }
2956 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2957
2958 ibm_backlight_device->props->brightness = b;
2959 brightness_update_status(ibm_backlight_device);
2960
2961 return 0;
2962 }
2963
2964 static void brightness_exit(void)
2965 {
2966 if (ibm_backlight_device) {
2967 vdbg_printk(TPACPI_DBG_EXIT,
2968 "calling backlight_device_unregister()\n");
2969 backlight_device_unregister(ibm_backlight_device);
2970 ibm_backlight_device = NULL;
2971 }
2972 }
2973
2974 static int brightness_update_status(struct backlight_device *bd)
2975 {
2976 return brightness_set(
2977 (bd->props->fb_blank == FB_BLANK_UNBLANK &&
2978 bd->props->power == FB_BLANK_UNBLANK) ?
2979 bd->props->brightness : 0);
2980 }
2981
2982 static int brightness_get(struct backlight_device *bd)
2983 {
2984 u8 level;
2985 if (!acpi_ec_read(brightness_offset, &level))
2986 return -EIO;
2987
2988 level &= 0x7;
2989
2990 return level;
2991 }
2992
2993 static int brightness_set(int value)
2994 {
2995 int cmos_cmd, inc, i;
2996 int current_value = brightness_get(NULL);
2997
2998 value &= 7;
2999
3000 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
3001 inc = value > current_value ? 1 : -1;
3002 for (i = current_value; i != value; i += inc) {
3003 if (issue_thinkpad_cmos_command(cmos_cmd))
3004 return -EIO;
3005 if (!acpi_ec_write(brightness_offset, i + inc))
3006 return -EIO;
3007 }
3008
3009 return 0;
3010 }
3011
3012 static int brightness_read(char *p)
3013 {
3014 int len = 0;
3015 int level;
3016
3017 if ((level = brightness_get(NULL)) < 0) {
3018 len += sprintf(p + len, "level:\t\tunreadable\n");
3019 } else {
3020 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
3021 len += sprintf(p + len, "commands:\tup, down\n");
3022 len += sprintf(p + len, "commands:\tlevel <level>"
3023 " (<level> is 0-7)\n");
3024 }
3025
3026 return len;
3027 }
3028
3029 static int brightness_write(char *buf)
3030 {
3031 int level;
3032 int new_level;
3033 char *cmd;
3034
3035 while ((cmd = next_cmd(&buf))) {
3036 if ((level = brightness_get(NULL)) < 0)
3037 return level;
3038 level &= 7;
3039
3040 if (strlencmp(cmd, "up") == 0) {
3041 new_level = level == 7 ? 7 : level + 1;
3042 } else if (strlencmp(cmd, "down") == 0) {
3043 new_level = level == 0 ? 0 : level - 1;
3044 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3045 new_level >= 0 && new_level <= 7) {
3046 /* new_level set */
3047 } else
3048 return -EINVAL;
3049
3050 brightness_set(new_level);
3051 }
3052
3053 return 0;
3054 }
3055
3056 static struct ibm_struct brightness_driver_data = {
3057 .name = "brightness",
3058 .read = brightness_read,
3059 .write = brightness_write,
3060 .exit = brightness_exit,
3061 };
3062
3063 /*************************************************************************
3064 * Volume subdriver
3065 */
3066
3067 static int volume_read(char *p)
3068 {
3069 int len = 0;
3070 u8 level;
3071
3072 if (!acpi_ec_read(volume_offset, &level)) {
3073 len += sprintf(p + len, "level:\t\tunreadable\n");
3074 } else {
3075 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3076 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3077 len += sprintf(p + len, "commands:\tup, down, mute\n");
3078 len += sprintf(p + len, "commands:\tlevel <level>"
3079 " (<level> is 0-15)\n");
3080 }
3081
3082 return len;
3083 }
3084
3085 static int volume_write(char *buf)
3086 {
3087 int cmos_cmd, inc, i;
3088 u8 level, mute;
3089 int new_level, new_mute;
3090 char *cmd;
3091
3092 while ((cmd = next_cmd(&buf))) {
3093 if (!acpi_ec_read(volume_offset, &level))
3094 return -EIO;
3095 new_mute = mute = level & 0x40;
3096 new_level = level = level & 0xf;
3097
3098 if (strlencmp(cmd, "up") == 0) {
3099 if (mute)
3100 new_mute = 0;
3101 else
3102 new_level = level == 15 ? 15 : level + 1;
3103 } else if (strlencmp(cmd, "down") == 0) {
3104 if (mute)
3105 new_mute = 0;
3106 else
3107 new_level = level == 0 ? 0 : level - 1;
3108 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3109 new_level >= 0 && new_level <= 15) {
3110 /* new_level set */
3111 } else if (strlencmp(cmd, "mute") == 0) {
3112 new_mute = 0x40;
3113 } else
3114 return -EINVAL;
3115
3116 if (new_level != level) { /* mute doesn't change */
3117 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3118 inc = new_level > level ? 1 : -1;
3119
3120 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3121 !acpi_ec_write(volume_offset, level)))
3122 return -EIO;
3123
3124 for (i = level; i != new_level; i += inc)
3125 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3126 !acpi_ec_write(volume_offset, i + inc))
3127 return -EIO;
3128
3129 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3130 !acpi_ec_write(volume_offset,
3131 new_level + mute)))
3132 return -EIO;
3133 }
3134
3135 if (new_mute != mute) { /* level doesn't change */
3136 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3137
3138 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3139 !acpi_ec_write(volume_offset, level + new_mute))
3140 return -EIO;
3141 }
3142 }
3143
3144 return 0;
3145 }
3146
3147 static struct ibm_struct volume_driver_data = {
3148 .name = "volume",
3149 .read = volume_read,
3150 .write = volume_write,
3151 };
3152
3153 /*************************************************************************
3154 * Fan subdriver
3155 */
3156
3157 /*
3158 * FAN ACCESS MODES
3159 *
3160 * TPACPI_FAN_RD_ACPI_GFAN:
3161 * ACPI GFAN method: returns fan level
3162 *
3163 * see TPACPI_FAN_WR_ACPI_SFAN
3164 * EC 0x2f (HFSP) not available if GFAN exists
3165 *
3166 * TPACPI_FAN_WR_ACPI_SFAN:
3167 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3168 *
3169 * EC 0x2f (HFSP) might be available *for reading*, but do not use
3170 * it for writing.
3171 *
3172 * TPACPI_FAN_WR_TPEC:
3173 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
3174 * Supported on almost all ThinkPads
3175 *
3176 * Fan speed changes of any sort (including those caused by the
3177 * disengaged mode) are usually done slowly by the firmware as the
3178 * maximum ammount of fan duty cycle change per second seems to be
3179 * limited.
3180 *
3181 * Reading is not available if GFAN exists.
3182 * Writing is not available if SFAN exists.
3183 *
3184 * Bits
3185 * 7 automatic mode engaged;
3186 * (default operation mode of the ThinkPad)
3187 * fan level is ignored in this mode.
3188 * 6 full speed mode (takes precedence over bit 7);
3189 * not available on all thinkpads. May disable
3190 * the tachometer while the fan controller ramps up
3191 * the speed (which can take up to a few *minutes*).
3192 * Speeds up fan to 100% duty-cycle, which is far above
3193 * the standard RPM levels. It is not impossible that
3194 * it could cause hardware damage.
3195 * 5-3 unused in some models. Extra bits for fan level
3196 * in others, but still useless as all values above
3197 * 7 map to the same speed as level 7 in these models.
3198 * 2-0 fan level (0..7 usually)
3199 * 0x00 = stop
3200 * 0x07 = max (set when temperatures critical)
3201 * Some ThinkPads may have other levels, see
3202 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3203 *
3204 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3205 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3206 * does so, its initial value is meaningless (0x07).
3207 *
3208 * For firmware bugs, refer to:
3209 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3210 *
3211 * ----
3212 *
3213 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3214 * Main fan tachometer reading (in RPM)
3215 *
3216 * This register is present on all ThinkPads with a new-style EC, and
3217 * it is known not to be present on the A21m/e, and T22, as there is
3218 * something else in offset 0x84 according to the ACPI DSDT. Other
3219 * ThinkPads from this same time period (and earlier) probably lack the
3220 * tachometer as well.
3221 *
3222 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3223 * was never fixed by IBM to report the EC firmware version string
3224 * probably support the tachometer (like the early X models), so
3225 * detecting it is quite hard. We need more data to know for sure.
3226 *
3227 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3228 * might result.
3229 *
3230 * FIRMWARE BUG: may go stale while the EC is switching to full speed
3231 * mode.
3232 *
3233 * For firmware bugs, refer to:
3234 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3235 *
3236 * TPACPI_FAN_WR_ACPI_FANS:
3237 * ThinkPad X31, X40, X41. Not available in the X60.
3238 *
3239 * FANS ACPI handle: takes three arguments: low speed, medium speed,
3240 * high speed. ACPI DSDT seems to map these three speeds to levels
3241 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3242 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3243 *
3244 * The speeds are stored on handles
3245 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3246 *
3247 * There are three default speed sets, acessible as handles:
3248 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3249 *
3250 * ACPI DSDT switches which set is in use depending on various
3251 * factors.
3252 *
3253 * TPACPI_FAN_WR_TPEC is also available and should be used to
3254 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
3255 * but the ACPI tables just mention level 7.
3256 */
3257
3258 static enum fan_status_access_mode fan_status_access_mode;
3259 static enum fan_control_access_mode fan_control_access_mode;
3260 static enum fan_control_commands fan_control_commands;
3261
3262 static u8 fan_control_initial_status;
3263 static u8 fan_control_desired_level;
3264
3265 static void fan_watchdog_fire(struct work_struct *ignored);
3266 static int fan_watchdog_maxinterval;
3267 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3268
3269 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
3270 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
3271 "\\FSPD", /* 600e/x, 770e, 770x */
3272 ); /* all others */
3273 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
3274 "JFNS", /* 770x-JL */
3275 ); /* all others */
3276
3277 /*
3278 * SYSFS fan layout: hwmon compatible (device)
3279 *
3280 * pwm*_enable:
3281 * 0: "disengaged" mode
3282 * 1: manual mode
3283 * 2: native EC "auto" mode (recommended, hardware default)
3284 *
3285 * pwm*: set speed in manual mode, ignored otherwise.
3286 * 0 is level 0; 255 is level 7. Intermediate points done with linear
3287 * interpolation.
3288 *
3289 * fan*_input: tachometer reading, RPM
3290 *
3291 *
3292 * SYSFS fan layout: extensions
3293 *
3294 * fan_watchdog (driver):
3295 * fan watchdog interval in seconds, 0 disables (default), max 120
3296 */
3297
3298 /* sysfs fan pwm1_enable ----------------------------------------------- */
3299 static ssize_t fan_pwm1_enable_show(struct device *dev,
3300 struct device_attribute *attr,
3301 char *buf)
3302 {
3303 int res, mode;
3304 u8 status;
3305
3306 res = fan_get_status_safe(&status);
3307 if (res)
3308 return res;
3309
3310 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3311 if (status != fan_control_initial_status) {
3312 tp_features.fan_ctrl_status_undef = 0;
3313 } else {
3314 /* Return most likely status. In fact, it
3315 * might be the only possible status */
3316 status = TP_EC_FAN_AUTO;
3317 }
3318 }
3319
3320 if (status & TP_EC_FAN_FULLSPEED) {
3321 mode = 0;
3322 } else if (status & TP_EC_FAN_AUTO) {
3323 mode = 2;
3324 } else
3325 mode = 1;
3326
3327 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3328 }
3329
3330 static ssize_t fan_pwm1_enable_store(struct device *dev,
3331 struct device_attribute *attr,
3332 const char *buf, size_t count)
3333 {
3334 unsigned long t;
3335 int res, level;
3336
3337 if (parse_strtoul(buf, 2, &t))
3338 return -EINVAL;
3339
3340 switch (t) {
3341 case 0:
3342 level = TP_EC_FAN_FULLSPEED;
3343 break;
3344 case 1:
3345 level = TPACPI_FAN_LAST_LEVEL;
3346 break;
3347 case 2:
3348 level = TP_EC_FAN_AUTO;
3349 break;
3350 case 3:
3351 /* reserved for software-controlled auto mode */
3352 return -ENOSYS;
3353 default:
3354 return -EINVAL;
3355 }
3356
3357 res = fan_set_level_safe(level);
3358 if (res == -ENXIO)
3359 return -EINVAL;
3360 else if (res < 0)
3361 return res;
3362
3363 fan_watchdog_reset();
3364
3365 return count;
3366 }
3367
3368 static struct device_attribute dev_attr_fan_pwm1_enable =
3369 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3370 fan_pwm1_enable_show, fan_pwm1_enable_store);
3371
3372 /* sysfs fan pwm1 ------------------------------------------------------ */
3373 static ssize_t fan_pwm1_show(struct device *dev,
3374 struct device_attribute *attr,
3375 char *buf)
3376 {
3377 int res;
3378 u8 status;
3379
3380 res = fan_get_status_safe(&status);
3381 if (res)
3382 return res;
3383
3384 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3385 if (status != fan_control_initial_status) {
3386 tp_features.fan_ctrl_status_undef = 0;
3387 } else {
3388 status = TP_EC_FAN_AUTO;
3389 }
3390 }
3391
3392 if ((status &
3393 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3394 status = fan_control_desired_level;
3395
3396 if (status > 7)
3397 status = 7;
3398
3399 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3400 }
3401
3402 static ssize_t fan_pwm1_store(struct device *dev,
3403 struct device_attribute *attr,
3404 const char *buf, size_t count)
3405 {
3406 unsigned long s;
3407 int rc;
3408 u8 status, newlevel;
3409
3410 if (parse_strtoul(buf, 255, &s))
3411 return -EINVAL;
3412
3413 /* scale down from 0-255 to 0-7 */
3414 newlevel = (s >> 5) & 0x07;
3415
3416 rc = mutex_lock_interruptible(&fan_mutex);
3417 if (rc < 0)
3418 return rc;
3419
3420 rc = fan_get_status(&status);
3421 if (!rc && (status &
3422 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3423 rc = fan_set_level(newlevel);
3424 if (rc == -ENXIO)
3425 rc = -EINVAL;
3426 else if (!rc) {
3427 fan_update_desired_level(newlevel);
3428 fan_watchdog_reset();
3429 }
3430 }
3431
3432 mutex_unlock(&fan_mutex);
3433 return (rc)? rc : count;
3434 }
3435
3436 static struct device_attribute dev_attr_fan_pwm1 =
3437 __ATTR(pwm1, S_IWUSR | S_IRUGO,
3438 fan_pwm1_show, fan_pwm1_store);
3439
3440 /* sysfs fan fan1_input ------------------------------------------------ */
3441 static ssize_t fan_fan1_input_show(struct device *dev,
3442 struct device_attribute *attr,
3443 char *buf)
3444 {
3445 int res;
3446 unsigned int speed;
3447
3448 res = fan_get_speed(&speed);
3449 if (res < 0)
3450 return res;
3451
3452 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3453 }
3454
3455 static struct device_attribute dev_attr_fan_fan1_input =
3456 __ATTR(fan1_input, S_IRUGO,
3457 fan_fan1_input_show, NULL);
3458
3459 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3460 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3461 char *buf)
3462 {
3463 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3464 }
3465
3466 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3467 const char *buf, size_t count)
3468 {
3469 unsigned long t;
3470
3471 if (parse_strtoul(buf, 120, &t))
3472 return -EINVAL;
3473
3474 if (!fan_control_allowed)
3475 return -EPERM;
3476
3477 fan_watchdog_maxinterval = t;
3478 fan_watchdog_reset();
3479
3480 return count;
3481 }
3482
3483 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3484 fan_fan_watchdog_show, fan_fan_watchdog_store);
3485
3486 /* --------------------------------------------------------------------- */
3487 static struct attribute *fan_attributes[] = {
3488 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3489 &dev_attr_fan_fan1_input.attr,
3490 NULL
3491 };
3492
3493 static const struct attribute_group fan_attr_group = {
3494 .attrs = fan_attributes,
3495 };
3496
3497 static int __init fan_init(struct ibm_init_struct *iibm)
3498 {
3499 int rc;
3500
3501 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3502
3503 mutex_init(&fan_mutex);
3504 fan_status_access_mode = TPACPI_FAN_NONE;
3505 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3506 fan_control_commands = 0;
3507 fan_watchdog_maxinterval = 0;
3508 tp_features.fan_ctrl_status_undef = 0;
3509 fan_control_desired_level = 7;
3510
3511 IBM_ACPIHANDLE_INIT(fans);
3512 IBM_ACPIHANDLE_INIT(gfan);
3513 IBM_ACPIHANDLE_INIT(sfan);
3514
3515 if (gfan_handle) {
3516 /* 570, 600e/x, 770e, 770x */
3517 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3518 } else {
3519 /* all other ThinkPads: note that even old-style
3520 * ThinkPad ECs supports the fan control register */
3521 if (likely(acpi_ec_read(fan_status_offset,
3522 &fan_control_initial_status))) {
3523 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3524
3525 /* In some ThinkPads, neither the EC nor the ACPI
3526 * DSDT initialize the fan status, and it ends up
3527 * being set to 0x07 when it *could* be either
3528 * 0x07 or 0x80.
3529 *
3530 * Enable for TP-1Y (T43), TP-78 (R51e),
3531 * TP-76 (R52), TP-70 (T43, R52), which are known
3532 * to be buggy. */
3533 if (fan_control_initial_status == 0x07 &&
3534 ibm_thinkpad_ec_found &&
3535 ((ibm_thinkpad_ec_found[0] == '1' &&
3536 ibm_thinkpad_ec_found[1] == 'Y') ||
3537 (ibm_thinkpad_ec_found[0] == '7' &&
3538 (ibm_thinkpad_ec_found[1] == '6' ||
3539 ibm_thinkpad_ec_found[1] == '8' ||
3540 ibm_thinkpad_ec_found[1] == '0'))
3541 )) {
3542 printk(IBM_NOTICE
3543 "fan_init: initial fan status is "
3544 "unknown, assuming it is in auto "
3545 "mode\n");
3546 tp_features.fan_ctrl_status_undef = 1;
3547 }
3548 } else {
3549 printk(IBM_ERR
3550 "ThinkPad ACPI EC access misbehaving, "
3551 "fan status and control unavailable\n");
3552 return 1;
3553 }
3554 }
3555
3556 if (sfan_handle) {
3557 /* 570, 770x-JL */
3558 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3559 fan_control_commands |=
3560 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3561 } else {
3562 if (!gfan_handle) {
3563 /* gfan without sfan means no fan control */
3564 /* all other models implement TP EC 0x2f control */
3565
3566 if (fans_handle) {
3567 /* X31, X40, X41 */
3568 fan_control_access_mode =
3569 TPACPI_FAN_WR_ACPI_FANS;
3570 fan_control_commands |=
3571 TPACPI_FAN_CMD_SPEED |
3572 TPACPI_FAN_CMD_LEVEL |
3573 TPACPI_FAN_CMD_ENABLE;
3574 } else {
3575 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3576 fan_control_commands |=
3577 TPACPI_FAN_CMD_LEVEL |
3578 TPACPI_FAN_CMD_ENABLE;
3579 }
3580 }
3581 }
3582
3583 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3584 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3585 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3586 fan_status_access_mode, fan_control_access_mode);
3587
3588 /* fan control master switch */
3589 if (!fan_control_allowed) {
3590 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3591 fan_control_commands = 0;
3592 dbg_printk(TPACPI_DBG_INIT,
3593 "fan control features disabled by parameter\n");
3594 }
3595
3596 /* update fan_control_desired_level */
3597 if (fan_status_access_mode != TPACPI_FAN_NONE)
3598 fan_get_status_safe(NULL);
3599
3600 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3601 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3602 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3603 &fan_attr_group);
3604 if (!(rc < 0))
3605 rc = driver_create_file(&tpacpi_pdriver.driver,
3606 &driver_attr_fan_watchdog);
3607 if (rc < 0)
3608 return rc;
3609 return 0;
3610 } else
3611 return 1;
3612 }
3613
3614 /*
3615 * Call with fan_mutex held
3616 */
3617 static void fan_update_desired_level(u8 status)
3618 {
3619 if ((status &
3620 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3621 if (status > 7)
3622 fan_control_desired_level = 7;
3623 else
3624 fan_control_desired_level = status;
3625 }
3626 }
3627
3628 static int fan_get_status(u8 *status)
3629 {
3630 u8 s;
3631
3632 /* TODO:
3633 * Add TPACPI_FAN_RD_ACPI_FANS ? */
3634
3635 switch (fan_status_access_mode) {
3636 case TPACPI_FAN_RD_ACPI_GFAN:
3637 /* 570, 600e/x, 770e, 770x */
3638
3639 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3640 return -EIO;
3641
3642 if (likely(status))
3643 *status = s & 0x07;
3644
3645 break;
3646
3647 case TPACPI_FAN_RD_TPEC:
3648 /* all except 570, 600e/x, 770e, 770x */
3649 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3650 return -EIO;
3651
3652 if (likely(status))
3653 *status = s;
3654
3655 break;
3656
3657 default:
3658 return -ENXIO;
3659 }
3660
3661 return 0;
3662 }
3663
3664 static int fan_get_status_safe(u8 *status)
3665 {
3666 int rc;
3667 u8 s;
3668
3669 rc = mutex_lock_interruptible(&fan_mutex);
3670 if (rc < 0)
3671 return rc;
3672 rc = fan_get_status(&s);
3673 if (!rc)
3674 fan_update_desired_level(s);
3675 mutex_unlock(&fan_mutex);
3676
3677 if (status)
3678 *status = s;
3679
3680 return rc;
3681 }
3682
3683 static void fan_exit(void)
3684 {
3685 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3686
3687 /* FIXME: can we really do this unconditionally? */
3688 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3689 driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3690
3691 cancel_delayed_work(&fan_watchdog_task);
3692 flush_scheduled_work();
3693 }
3694
3695 static int fan_get_speed(unsigned int *speed)
3696 {
3697 u8 hi, lo;
3698
3699 switch (fan_status_access_mode) {
3700 case TPACPI_FAN_RD_TPEC:
3701 /* all except 570, 600e/x, 770e, 770x */
3702 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3703 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3704 return -EIO;
3705
3706 if (likely(speed))
3707 *speed = (hi << 8) | lo;
3708
3709 break;
3710
3711 default:
3712 return -ENXIO;
3713 }
3714
3715 return 0;
3716 }
3717
3718 static void fan_watchdog_fire(struct work_struct *ignored)
3719 {
3720 int rc;
3721
3722 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3723 rc = fan_set_enable();
3724 if (rc < 0) {
3725 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3726 "will try again later...\n", -rc);
3727 /* reschedule for later */
3728 fan_watchdog_reset();
3729 }
3730 }
3731
3732 static void fan_watchdog_reset(void)
3733 {
3734 static int fan_watchdog_active;
3735
3736 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3737 return;
3738
3739 if (fan_watchdog_active)
3740 cancel_delayed_work(&fan_watchdog_task);
3741
3742 if (fan_watchdog_maxinterval > 0) {
3743 fan_watchdog_active = 1;
3744 if (!schedule_delayed_work(&fan_watchdog_task,
3745 msecs_to_jiffies(fan_watchdog_maxinterval
3746 * 1000))) {
3747 printk(IBM_ERR "failed to schedule the fan watchdog, "
3748 "watchdog will not trigger\n");
3749 }
3750 } else
3751 fan_watchdog_active = 0;
3752 }
3753
3754 static int fan_set_level(int level)
3755 {
3756 if (!fan_control_allowed)
3757 return -EPERM;
3758
3759 switch (fan_control_access_mode) {
3760 case TPACPI_FAN_WR_ACPI_SFAN:
3761 if (level >= 0 && level <= 7) {
3762 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3763 return -EIO;
3764 } else
3765 return -EINVAL;
3766 break;
3767
3768 case TPACPI_FAN_WR_ACPI_FANS:
3769 case TPACPI_FAN_WR_TPEC:
3770 if ((level != TP_EC_FAN_AUTO) &&
3771 (level != TP_EC_FAN_FULLSPEED) &&
3772 ((level < 0) || (level > 7)))
3773 return -EINVAL;
3774
3775 /* safety net should the EC not support AUTO
3776 * or FULLSPEED mode bits and just ignore them */
3777 if (level & TP_EC_FAN_FULLSPEED)
3778 level |= 7; /* safety min speed 7 */
3779 else if (level & TP_EC_FAN_FULLSPEED)
3780 level |= 4; /* safety min speed 4 */
3781
3782 if (!acpi_ec_write(fan_status_offset, level))
3783 return -EIO;
3784 else
3785 tp_features.fan_ctrl_status_undef = 0;
3786 break;
3787
3788 default:
3789 return -ENXIO;
3790 }
3791 return 0;
3792 }
3793
3794 static int fan_set_level_safe(int level)
3795 {
3796 int rc;
3797
3798 if (!fan_control_allowed)
3799 return -EPERM;
3800
3801 rc = mutex_lock_interruptible(&fan_mutex);
3802 if (rc < 0)
3803 return rc;
3804
3805 if (level == TPACPI_FAN_LAST_LEVEL)
3806 level = fan_control_desired_level;
3807
3808 rc = fan_set_level(level);
3809 if (!rc)
3810 fan_update_desired_level(level);
3811
3812 mutex_unlock(&fan_mutex);
3813 return rc;
3814 }
3815
3816 static int fan_set_enable(void)
3817 {
3818 u8 s;
3819 int rc;
3820
3821 if (!fan_control_allowed)
3822 return -EPERM;
3823
3824 rc = mutex_lock_interruptible(&fan_mutex);
3825 if (rc < 0)
3826 return rc;
3827
3828 switch (fan_control_access_mode) {
3829 case TPACPI_FAN_WR_ACPI_FANS:
3830 case TPACPI_FAN_WR_TPEC:
3831 rc = fan_get_status(&s);
3832 if (rc < 0)
3833 break;
3834
3835 /* Don't go out of emergency fan mode */
3836 if (s != 7) {
3837 s &= 0x07;
3838 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3839 }
3840
3841 if (!acpi_ec_write(fan_status_offset, s))
3842 rc = -EIO;
3843 else {
3844 tp_features.fan_ctrl_status_undef = 0;
3845 rc = 0;
3846 }
3847 break;
3848
3849 case TPACPI_FAN_WR_ACPI_SFAN:
3850 rc = fan_get_status(&s);
3851 if (rc < 0)
3852 break;
3853
3854 s &= 0x07;
3855
3856 /* Set fan to at least level 4 */
3857 s |= 4;
3858
3859 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3860 rc= -EIO;
3861 else
3862 rc = 0;
3863 break;
3864
3865 default:
3866 rc = -ENXIO;
3867 }
3868
3869 mutex_unlock(&fan_mutex);
3870 return rc;
3871 }
3872
3873 static int fan_set_disable(void)
3874 {
3875 int rc;
3876
3877 if (!fan_control_allowed)
3878 return -EPERM;
3879
3880 rc = mutex_lock_interruptible(&fan_mutex);
3881 if (rc < 0)
3882 return rc;
3883
3884 rc = 0;
3885 switch (fan_control_access_mode) {
3886 case TPACPI_FAN_WR_ACPI_FANS:
3887 case TPACPI_FAN_WR_TPEC:
3888 if (!acpi_ec_write(fan_status_offset, 0x00))
3889 rc = -EIO;
3890 else {
3891 fan_control_desired_level = 0;
3892 tp_features.fan_ctrl_status_undef = 0;
3893 }
3894 break;
3895
3896 case TPACPI_FAN_WR_ACPI_SFAN:
3897 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
3898 rc = -EIO;
3899 else
3900 fan_control_desired_level = 0;
3901 break;
3902
3903 default:
3904 rc = -ENXIO;
3905 }
3906
3907
3908 mutex_unlock(&fan_mutex);
3909 return rc;
3910 }
3911
3912 static int fan_set_speed(int speed)
3913 {
3914 int rc;
3915
3916 if (!fan_control_allowed)
3917 return -EPERM;
3918
3919 rc = mutex_lock_interruptible(&fan_mutex);
3920 if (rc < 0)
3921 return rc;
3922
3923 rc = 0;
3924 switch (fan_control_access_mode) {
3925 case TPACPI_FAN_WR_ACPI_FANS:
3926 if (speed >= 0 && speed <= 65535) {
3927 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3928 speed, speed, speed))
3929 rc = -EIO;
3930 } else
3931 rc = -EINVAL;
3932 break;
3933
3934 default:
3935 rc = -ENXIO;
3936 }
3937
3938 mutex_unlock(&fan_mutex);
3939 return rc;
3940 }
3941
3942 static int fan_read(char *p)
3943 {
3944 int len = 0;
3945 int rc;
3946 u8 status;
3947 unsigned int speed = 0;
3948
3949 switch (fan_status_access_mode) {
3950 case TPACPI_FAN_RD_ACPI_GFAN:
3951 /* 570, 600e/x, 770e, 770x */
3952 if ((rc = fan_get_status_safe(&status)) < 0)
3953 return rc;
3954
3955 len += sprintf(p + len, "status:\t\t%s\n"
3956 "level:\t\t%d\n",
3957 (status != 0) ? "enabled" : "disabled", status);
3958 break;
3959
3960 case TPACPI_FAN_RD_TPEC:
3961 /* all except 570, 600e/x, 770e, 770x */
3962 if ((rc = fan_get_status_safe(&status)) < 0)
3963 return rc;
3964
3965 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3966 if (status != fan_control_initial_status)
3967 tp_features.fan_ctrl_status_undef = 0;
3968 else
3969 /* Return most likely status. In fact, it
3970 * might be the only possible status */
3971 status = TP_EC_FAN_AUTO;
3972 }
3973
3974 len += sprintf(p + len, "status:\t\t%s\n",
3975 (status != 0) ? "enabled" : "disabled");
3976
3977 if ((rc = fan_get_speed(&speed)) < 0)
3978 return rc;
3979
3980 len += sprintf(p + len, "speed:\t\t%d\n", speed);
3981
3982 if (status & TP_EC_FAN_FULLSPEED)
3983 /* Disengaged mode takes precedence */
3984 len += sprintf(p + len, "level:\t\tdisengaged\n");
3985 else if (status & TP_EC_FAN_AUTO)
3986 len += sprintf(p + len, "level:\t\tauto\n");
3987 else
3988 len += sprintf(p + len, "level:\t\t%d\n", status);
3989 break;
3990
3991 case TPACPI_FAN_NONE:
3992 default:
3993 len += sprintf(p + len, "status:\t\tnot supported\n");
3994 }
3995
3996 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
3997 len += sprintf(p + len, "commands:\tlevel <level>");
3998
3999 switch (fan_control_access_mode) {
4000 case TPACPI_FAN_WR_ACPI_SFAN:
4001 len += sprintf(p + len, " (<level> is 0-7)\n");
4002 break;
4003
4004 default:
4005 len += sprintf(p + len, " (<level> is 0-7, "
4006 "auto, disengaged, full-speed)\n");
4007 break;
4008 }
4009 }
4010
4011 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4012 len += sprintf(p + len, "commands:\tenable, disable\n"
4013 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4014 "1-120 (seconds))\n");
4015
4016 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4017 len += sprintf(p + len, "commands:\tspeed <speed>"
4018 " (<speed> is 0-65535)\n");
4019
4020 return len;
4021 }
4022
4023 static int fan_write_cmd_level(const char *cmd, int *rc)
4024 {
4025 int level;
4026
4027 if (strlencmp(cmd, "level auto") == 0)
4028 level = TP_EC_FAN_AUTO;
4029 else if ((strlencmp(cmd, "level disengaged") == 0) |
4030 (strlencmp(cmd, "level full-speed") == 0))
4031 level = TP_EC_FAN_FULLSPEED;
4032 else if (sscanf(cmd, "level %d", &level) != 1)
4033 return 0;
4034
4035 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4036 printk(IBM_ERR "level command accepted for unsupported "
4037 "access mode %d", fan_control_access_mode);
4038
4039 return 1;
4040 }
4041
4042 static int fan_write_cmd_enable(const char *cmd, int *rc)
4043 {
4044 if (strlencmp(cmd, "enable") != 0)
4045 return 0;
4046
4047 if ((*rc = fan_set_enable()) == -ENXIO)
4048 printk(IBM_ERR "enable command accepted for unsupported "
4049 "access mode %d", fan_control_access_mode);
4050
4051 return 1;
4052 }
4053
4054 static int fan_write_cmd_disable(const char *cmd, int *rc)
4055 {
4056 if (strlencmp(cmd, "disable") != 0)
4057 return 0;
4058
4059 if ((*rc = fan_set_disable()) == -ENXIO)
4060 printk(IBM_ERR "disable command accepted for unsupported "
4061 "access mode %d", fan_control_access_mode);
4062
4063 return 1;
4064 }
4065
4066 static int fan_write_cmd_speed(const char *cmd, int *rc)
4067 {
4068 int speed;
4069
4070 /* TODO:
4071 * Support speed <low> <medium> <high> ? */
4072
4073 if (sscanf(cmd, "speed %d", &speed) != 1)
4074 return 0;
4075
4076 if ((*rc = fan_set_speed(speed)) == -ENXIO)
4077 printk(IBM_ERR "speed command accepted for unsupported "
4078 "access mode %d", fan_control_access_mode);
4079
4080 return 1;
4081 }
4082
4083 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4084 {
4085 int interval;
4086
4087 if (sscanf(cmd, "watchdog %d", &interval) != 1)
4088 return 0;
4089
4090 if (interval < 0 || interval > 120)
4091 *rc = -EINVAL;
4092 else
4093 fan_watchdog_maxinterval = interval;
4094
4095 return 1;
4096 }
4097
4098 static int fan_write(char *buf)
4099 {
4100 char *cmd;
4101 int rc = 0;
4102
4103 while (!rc && (cmd = next_cmd(&buf))) {
4104 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4105 fan_write_cmd_level(cmd, &rc)) &&
4106 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4107 (fan_write_cmd_enable(cmd, &rc) ||
4108 fan_write_cmd_disable(cmd, &rc) ||
4109 fan_write_cmd_watchdog(cmd, &rc))) &&
4110 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4111 fan_write_cmd_speed(cmd, &rc))
4112 )
4113 rc = -EINVAL;
4114 else if (!rc)
4115 fan_watchdog_reset();
4116 }
4117
4118 return rc;
4119 }
4120
4121 static struct ibm_struct fan_driver_data = {
4122 .name = "fan",
4123 .read = fan_read,
4124 .write = fan_write,
4125 .exit = fan_exit,
4126 };
4127
4128 /****************************************************************************
4129 ****************************************************************************
4130 *
4131 * Infrastructure
4132 *
4133 ****************************************************************************
4134 ****************************************************************************/
4135
4136 /* /proc support */
4137 static struct proc_dir_entry *proc_dir;
4138
4139 /* Subdriver registry */
4140 static LIST_HEAD(tpacpi_all_drivers);
4141
4142
4143 /*
4144 * Module and infrastructure proble, init and exit handling
4145 */
4146
4147 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4148 static const char * __init str_supported(int is_supported)
4149 {
4150 static char text_unsupported[] __initdata = "not supported";
4151
4152 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4153 }
4154 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4155
4156 static int __init ibm_init(struct ibm_init_struct *iibm)
4157 {
4158 int ret;
4159 struct ibm_struct *ibm = iibm->data;
4160 struct proc_dir_entry *entry;
4161
4162 BUG_ON(ibm == NULL);
4163
4164 INIT_LIST_HEAD(&ibm->all_drivers);
4165
4166 if (ibm->flags.experimental && !experimental)
4167 return 0;
4168
4169 dbg_printk(TPACPI_DBG_INIT,
4170 "probing for %s\n", ibm->name);
4171
4172 if (iibm->init) {
4173 ret = iibm->init(iibm);
4174 if (ret > 0)
4175 return 0; /* probe failed */
4176 if (ret)
4177 return ret;
4178
4179 ibm->flags.init_called = 1;
4180 }
4181
4182 if (ibm->acpi) {
4183 if (ibm->acpi->hid) {
4184 ret = register_tpacpi_subdriver(ibm);
4185 if (ret)
4186 goto err_out;
4187 }
4188
4189 if (ibm->acpi->notify) {
4190 ret = setup_acpi_notify(ibm);
4191 if (ret == -ENODEV) {
4192 printk(IBM_NOTICE "disabling subdriver %s\n",
4193 ibm->name);
4194 ret = 0;
4195 goto err_out;
4196 }
4197 if (ret < 0)
4198 goto err_out;
4199 }
4200 }
4201
4202 dbg_printk(TPACPI_DBG_INIT,
4203 "%s installed\n", ibm->name);
4204
4205 if (ibm->read) {
4206 entry = create_proc_entry(ibm->name,
4207 S_IFREG | S_IRUGO | S_IWUSR,
4208 proc_dir);
4209 if (!entry) {
4210 printk(IBM_ERR "unable to create proc entry %s\n",
4211 ibm->name);
4212 ret = -ENODEV;
4213 goto err_out;
4214 }
4215 entry->owner = THIS_MODULE;
4216 entry->data = ibm;
4217 entry->read_proc = &dispatch_procfs_read;
4218 if (ibm->write)
4219 entry->write_proc = &dispatch_procfs_write;
4220 ibm->flags.proc_created = 1;
4221 }
4222
4223 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4224
4225 return 0;
4226
4227 err_out:
4228 dbg_printk(TPACPI_DBG_INIT,
4229 "%s: at error exit path with result %d\n",
4230 ibm->name, ret);
4231
4232 ibm_exit(ibm);
4233 return (ret < 0)? ret : 0;
4234 }
4235
4236 static void ibm_exit(struct ibm_struct *ibm)
4237 {
4238 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4239
4240 list_del_init(&ibm->all_drivers);
4241
4242 if (ibm->flags.acpi_notify_installed) {
4243 dbg_printk(TPACPI_DBG_EXIT,
4244 "%s: acpi_remove_notify_handler\n", ibm->name);
4245 BUG_ON(!ibm->acpi);
4246 acpi_remove_notify_handler(*ibm->acpi->handle,
4247 ibm->acpi->type,
4248 dispatch_acpi_notify);
4249 ibm->flags.acpi_notify_installed = 0;
4250 ibm->flags.acpi_notify_installed = 0;
4251 }
4252
4253 if (ibm->flags.proc_created) {
4254 dbg_printk(TPACPI_DBG_EXIT,
4255 "%s: remove_proc_entry\n", ibm->name);
4256 remove_proc_entry(ibm->name, proc_dir);
4257 ibm->flags.proc_created = 0;
4258 }
4259
4260 if (ibm->flags.acpi_driver_registered) {
4261 dbg_printk(TPACPI_DBG_EXIT,
4262 "%s: acpi_bus_unregister_driver\n", ibm->name);
4263 BUG_ON(!ibm->acpi);
4264 acpi_bus_unregister_driver(ibm->acpi->driver);
4265 kfree(ibm->acpi->driver);
4266 ibm->acpi->driver = NULL;
4267 ibm->flags.acpi_driver_registered = 0;
4268 }
4269
4270 if (ibm->flags.init_called && ibm->exit) {
4271 ibm->exit();
4272 ibm->flags.init_called = 0;
4273 }
4274
4275 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4276 }
4277
4278 /* Probing */
4279
4280 static char *ibm_thinkpad_ec_found;
4281
4282 static char* __init check_dmi_for_ec(void)
4283 {
4284 struct dmi_device *dev = NULL;
4285 char ec_fw_string[18];
4286
4287 /*
4288 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4289 * X32 or newer, all Z series; Some models must have an
4290 * up-to-date BIOS or they will not be detected.
4291 *
4292 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4293 */
4294 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4295 if (sscanf(dev->name,
4296 "IBM ThinkPad Embedded Controller -[%17c",
4297 ec_fw_string) == 1) {
4298 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4299 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4300 return kstrdup(ec_fw_string, GFP_KERNEL);
4301 }
4302 }
4303 return NULL;
4304 }
4305
4306 static int __init probe_for_thinkpad(void)
4307 {
4308 int is_thinkpad;
4309
4310 if (acpi_disabled)
4311 return -ENODEV;
4312
4313 /*
4314 * Non-ancient models have better DMI tagging, but very old models
4315 * don't.
4316 */
4317 is_thinkpad = dmi_name_in_vendors("ThinkPad");
4318
4319 /* ec is required because many other handles are relative to it */
4320 IBM_ACPIHANDLE_INIT(ec);
4321 if (!ec_handle) {
4322 if (is_thinkpad)
4323 printk(IBM_ERR
4324 "Not yet supported ThinkPad detected!\n");
4325 return -ENODEV;
4326 }
4327
4328 /*
4329 * Risks a regression on very old machines, but reduces potential
4330 * false positives a damn great deal
4331 */
4332 if (!is_thinkpad)
4333 is_thinkpad = dmi_name_in_vendors("IBM");
4334
4335 if (!is_thinkpad && !force_load)
4336 return -ENODEV;
4337
4338 return 0;
4339 }
4340
4341
4342 /* Module init, exit, parameters */
4343
4344 static struct ibm_init_struct ibms_init[] __initdata = {
4345 {
4346 .init = thinkpad_acpi_driver_init,
4347 .data = &thinkpad_acpi_driver_data,
4348 },
4349 {
4350 .init = hotkey_init,
4351 .data = &hotkey_driver_data,
4352 },
4353 {
4354 .init = bluetooth_init,
4355 .data = &bluetooth_driver_data,
4356 },
4357 {
4358 .init = wan_init,
4359 .data = &wan_driver_data,
4360 },
4361 {
4362 .init = video_init,
4363 .data = &video_driver_data,
4364 },
4365 {
4366 .init = light_init,
4367 .data = &light_driver_data,
4368 },
4369 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4370 {
4371 .init = dock_init,
4372 .data = &dock_driver_data[0],
4373 },
4374 {
4375 .init = dock_init2,
4376 .data = &dock_driver_data[1],
4377 },
4378 #endif
4379 #ifdef CONFIG_THINKPAD_ACPI_BAY
4380 {
4381 .init = bay_init,
4382 .data = &bay_driver_data,
4383 },
4384 #endif
4385 {
4386 .init = cmos_init,
4387 .data = &cmos_driver_data,
4388 },
4389 {
4390 .init = led_init,
4391 .data = &led_driver_data,
4392 },
4393 {
4394 .init = beep_init,
4395 .data = &beep_driver_data,
4396 },
4397 {
4398 .init = thermal_init,
4399 .data = &thermal_driver_data,
4400 },
4401 {
4402 .data = &ecdump_driver_data,
4403 },
4404 {
4405 .init = brightness_init,
4406 .data = &brightness_driver_data,
4407 },
4408 {
4409 .data = &volume_driver_data,
4410 },
4411 {
4412 .init = fan_init,
4413 .data = &fan_driver_data,
4414 },
4415 };
4416
4417 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4418 {
4419 unsigned int i;
4420 struct ibm_struct *ibm;
4421
4422 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4423 ibm = ibms_init[i].data;
4424 BUG_ON(ibm == NULL);
4425
4426 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4427 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4428 return -ENOSPC;
4429 strcpy(ibms_init[i].param, val);
4430 strcat(ibms_init[i].param, ",");
4431 return 0;
4432 }
4433 }
4434
4435 return -EINVAL;
4436 }
4437
4438 static int experimental;
4439 module_param(experimental, int, 0);
4440
4441 static u32 dbg_level;
4442 module_param_named(debug, dbg_level, uint, 0);
4443
4444 static int force_load;
4445 module_param(force_load, int, 0);
4446
4447 static int fan_control_allowed;
4448 module_param_named(fan_control, fan_control_allowed, int, 0);
4449
4450 #define IBM_PARAM(feature) \
4451 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4452
4453 IBM_PARAM(hotkey);
4454 IBM_PARAM(bluetooth);
4455 IBM_PARAM(video);
4456 IBM_PARAM(light);
4457 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4458 IBM_PARAM(dock);
4459 #endif
4460 #ifdef CONFIG_THINKPAD_ACPI_BAY
4461 IBM_PARAM(bay);
4462 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4463 IBM_PARAM(cmos);
4464 IBM_PARAM(led);
4465 IBM_PARAM(beep);
4466 IBM_PARAM(ecdump);
4467 IBM_PARAM(brightness);
4468 IBM_PARAM(volume);
4469 IBM_PARAM(fan);
4470
4471 static int __init thinkpad_acpi_module_init(void)
4472 {
4473 int ret, i;
4474
4475 /* Driver-level probe */
4476 ret = probe_for_thinkpad();
4477 if (ret)
4478 return ret;
4479
4480 /* Driver initialization */
4481 ibm_thinkpad_ec_found = check_dmi_for_ec();
4482 IBM_ACPIHANDLE_INIT(ecrd);
4483 IBM_ACPIHANDLE_INIT(ecwr);
4484
4485 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4486 if (!proc_dir) {
4487 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4488 thinkpad_acpi_module_exit();
4489 return -ENODEV;
4490 }
4491 proc_dir->owner = THIS_MODULE;
4492
4493 ret = platform_driver_register(&tpacpi_pdriver);
4494 if (ret) {
4495 printk(IBM_ERR "unable to register platform driver\n");
4496 thinkpad_acpi_module_exit();
4497 return ret;
4498 }
4499 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4500 if (ret) {
4501 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4502 thinkpad_acpi_module_exit();
4503 return ret;
4504 }
4505
4506
4507 /* Device initialization */
4508 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4509 NULL, 0);
4510 if (IS_ERR(tpacpi_pdev)) {
4511 ret = PTR_ERR(tpacpi_pdev);
4512 tpacpi_pdev = NULL;
4513 printk(IBM_ERR "unable to register platform device\n");
4514 thinkpad_acpi_module_exit();
4515 return ret;
4516 }
4517 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4518 if (IS_ERR(tpacpi_hwmon)) {
4519 ret = PTR_ERR(tpacpi_hwmon);
4520 tpacpi_hwmon = NULL;
4521 printk(IBM_ERR "unable to register hwmon device\n");
4522 thinkpad_acpi_module_exit();
4523 return ret;
4524 }
4525 tpacpi_inputdev = input_allocate_device();
4526 if (!tpacpi_inputdev) {
4527 printk(IBM_ERR "unable to allocate input device\n");
4528 thinkpad_acpi_module_exit();
4529 return -ENOMEM;
4530 } else {
4531 /* Prepare input device, but don't register */
4532 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4533 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4534 tpacpi_inputdev->id.bustype = BUS_HOST;
4535 tpacpi_inputdev->id.vendor = TPACPI_HKEY_INPUT_VENDOR;
4536 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4537 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4538 }
4539 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4540 ret = ibm_init(&ibms_init[i]);
4541 if (ret >= 0 && *ibms_init[i].param)
4542 ret = ibms_init[i].data->write(ibms_init[i].param);
4543 if (ret < 0) {
4544 thinkpad_acpi_module_exit();
4545 return ret;
4546 }
4547 }
4548 ret = input_register_device(tpacpi_inputdev);
4549 if (ret < 0) {
4550 printk(IBM_ERR "unable to register input device\n");
4551 thinkpad_acpi_module_exit();
4552 return ret;
4553 } else {
4554 tp_features.input_device_registered = 1;
4555 }
4556
4557 return 0;
4558 }
4559
4560 static void thinkpad_acpi_module_exit(void)
4561 {
4562 struct ibm_struct *ibm, *itmp;
4563
4564 list_for_each_entry_safe_reverse(ibm, itmp,
4565 &tpacpi_all_drivers,
4566 all_drivers) {
4567 ibm_exit(ibm);
4568 }
4569
4570 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4571
4572 if (tpacpi_inputdev) {
4573 if (tp_features.input_device_registered)
4574 input_unregister_device(tpacpi_inputdev);
4575 else
4576 input_free_device(tpacpi_inputdev);
4577 }
4578
4579 if (tpacpi_hwmon)
4580 hwmon_device_unregister(tpacpi_hwmon);
4581
4582 if (tpacpi_pdev)
4583 platform_device_unregister(tpacpi_pdev);
4584
4585 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4586 platform_driver_unregister(&tpacpi_pdriver);
4587
4588 if (proc_dir)
4589 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4590
4591 kfree(ibm_thinkpad_ec_found);
4592 }
4593
4594 module_init(thinkpad_acpi_module_init);
4595 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree