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ACPI: thinkpad-acpi: bump up version to 0.15
[wandboard.git] / drivers / misc / thinkpad_acpi.c
blob01bed937d387abec6773e4611342703c1ab82c46
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 "0.15"
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 printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
721 (thinkpad_id.bios_version_str) ?
722 thinkpad_id.bios_version_str : "unknown",
723 (thinkpad_id.ec_version_str) ?
724 thinkpad_id.ec_version_str : "unknown");
725
726 if (thinkpad_id.vendor && thinkpad_id.model_str)
727 printk(IBM_INFO "%s %s\n",
728 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
729 "IBM" : ((thinkpad_id.vendor ==
730 PCI_VENDOR_ID_LENOVO) ?
731 "Lenovo" : "Unknown vendor"),
732 thinkpad_id.model_str);
733
734 return 0;
735 }
736
737 static int thinkpad_acpi_driver_read(char *p)
738 {
739 int len = 0;
740
741 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
742 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
743
744 return len;
745 }
746
747 static struct ibm_struct thinkpad_acpi_driver_data = {
748 .name = "driver",
749 .read = thinkpad_acpi_driver_read,
750 };
751
752 /*************************************************************************
753 * Hotkey subdriver
754 */
755
756 static int hotkey_orig_status;
757 static u32 hotkey_orig_mask;
758 static u32 hotkey_all_mask;
759 static u32 hotkey_reserved_mask;
760
761 static u16 *hotkey_keycode_map;
762
763 static struct attribute_set *hotkey_dev_attributes;
764
765 static int hotkey_get_wlsw(int *status)
766 {
767 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
768 return -EIO;
769 return 0;
770 }
771
772 /* sysfs hotkey enable ------------------------------------------------- */
773 static ssize_t hotkey_enable_show(struct device *dev,
774 struct device_attribute *attr,
775 char *buf)
776 {
777 int res, status;
778 u32 mask;
779
780 res = hotkey_get(&status, &mask);
781 if (res)
782 return res;
783
784 return snprintf(buf, PAGE_SIZE, "%d\n", status);
785 }
786
787 static ssize_t hotkey_enable_store(struct device *dev,
788 struct device_attribute *attr,
789 const char *buf, size_t count)
790 {
791 unsigned long t;
792 int res, status;
793 u32 mask;
794
795 if (parse_strtoul(buf, 1, &t))
796 return -EINVAL;
797
798 res = hotkey_get(&status, &mask);
799 if (!res)
800 res = hotkey_set(t, mask);
801
802 return (res) ? res : count;
803 }
804
805 static struct device_attribute dev_attr_hotkey_enable =
806 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
807 hotkey_enable_show, hotkey_enable_store);
808
809 /* sysfs hotkey mask --------------------------------------------------- */
810 static ssize_t hotkey_mask_show(struct device *dev,
811 struct device_attribute *attr,
812 char *buf)
813 {
814 int res, status;
815 u32 mask;
816
817 res = hotkey_get(&status, &mask);
818 if (res)
819 return res;
820
821 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
822 }
823
824 static ssize_t hotkey_mask_store(struct device *dev,
825 struct device_attribute *attr,
826 const char *buf, size_t count)
827 {
828 unsigned long t;
829 int res, status;
830 u32 mask;
831
832 if (parse_strtoul(buf, 0xffffffffUL, &t))
833 return -EINVAL;
834
835 res = hotkey_get(&status, &mask);
836 if (!res)
837 hotkey_set(status, t);
838
839 return (res) ? res : count;
840 }
841
842 static struct device_attribute dev_attr_hotkey_mask =
843 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
844 hotkey_mask_show, hotkey_mask_store);
845
846 /* sysfs hotkey bios_enabled ------------------------------------------- */
847 static ssize_t hotkey_bios_enabled_show(struct device *dev,
848 struct device_attribute *attr,
849 char *buf)
850 {
851 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
852 }
853
854 static struct device_attribute dev_attr_hotkey_bios_enabled =
855 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
856
857 /* sysfs hotkey bios_mask ---------------------------------------------- */
858 static ssize_t hotkey_bios_mask_show(struct device *dev,
859 struct device_attribute *attr,
860 char *buf)
861 {
862 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
863 }
864
865 static struct device_attribute dev_attr_hotkey_bios_mask =
866 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
867
868 /* sysfs hotkey all_mask ----------------------------------------------- */
869 static ssize_t hotkey_all_mask_show(struct device *dev,
870 struct device_attribute *attr,
871 char *buf)
872 {
873 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
874 }
875
876 static struct device_attribute dev_attr_hotkey_all_mask =
877 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
878
879 /* sysfs hotkey recommended_mask --------------------------------------- */
880 static ssize_t hotkey_recommended_mask_show(struct device *dev,
881 struct device_attribute *attr,
882 char *buf)
883 {
884 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
885 hotkey_all_mask & ~hotkey_reserved_mask);
886 }
887
888 static struct device_attribute dev_attr_hotkey_recommended_mask =
889 __ATTR(hotkey_recommended_mask, S_IRUGO,
890 hotkey_recommended_mask_show, NULL);
891
892 /* sysfs hotkey radio_sw ----------------------------------------------- */
893 static ssize_t hotkey_radio_sw_show(struct device *dev,
894 struct device_attribute *attr,
895 char *buf)
896 {
897 int res, s;
898 res = hotkey_get_wlsw(&s);
899 if (res < 0)
900 return res;
901
902 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
903 }
904
905 static struct device_attribute dev_attr_hotkey_radio_sw =
906 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
907
908 /* --------------------------------------------------------------------- */
909
910 static struct attribute *hotkey_mask_attributes[] = {
911 &dev_attr_hotkey_mask.attr,
912 &dev_attr_hotkey_bios_enabled.attr,
913 &dev_attr_hotkey_bios_mask.attr,
914 &dev_attr_hotkey_all_mask.attr,
915 &dev_attr_hotkey_recommended_mask.attr,
916 };
917
918 static int __init hotkey_init(struct ibm_init_struct *iibm)
919 {
920
921 static u16 ibm_keycode_map[] __initdata = {
922 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
923 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
924 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
925 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
926 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
927 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
928 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
929 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
930 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
931 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
932 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
933 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
934 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
935 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
936 KEY_RESERVED, /* 0x14: VOLUME UP */
937 KEY_RESERVED, /* 0x15: VOLUME DOWN */
938 KEY_RESERVED, /* 0x16: MUTE */
939 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
940 /* (assignments unknown, please report if found) */
941 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
942 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
943 };
944 static u16 lenovo_keycode_map[] __initdata = {
945 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
946 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
947 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
948 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
949 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
950 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
951 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
952 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
953 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
954 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
955 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
956 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
957 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
958 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
959 KEY_RESERVED, /* 0x14: VOLUME UP */
960 KEY_RESERVED, /* 0x15: VOLUME DOWN */
961 KEY_RESERVED, /* 0x16: MUTE */
962 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
963 /* (assignments unknown, please report if found) */
964 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
965 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
966 };
967
968 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
969 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
970 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
971
972 int res, i;
973 int status;
974
975 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
976
977 BUG_ON(!tpacpi_inputdev);
978
979 IBM_ACPIHANDLE_INIT(hkey);
980 mutex_init(&hotkey_mutex);
981
982 /* hotkey not supported on 570 */
983 tp_features.hotkey = hkey_handle != NULL;
984
985 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
986 str_supported(tp_features.hotkey));
987
988 if (tp_features.hotkey) {
989 hotkey_dev_attributes = create_attr_set(7, NULL);
990 if (!hotkey_dev_attributes)
991 return -ENOMEM;
992 res = add_to_attr_set(hotkey_dev_attributes,
993 &dev_attr_hotkey_enable.attr);
994 if (res)
995 return res;
996
997 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
998 A30, R30, R31, T20-22, X20-21, X22-24 */
999 tp_features.hotkey_mask =
1000 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
1001
1002 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1003 str_supported(tp_features.hotkey_mask));
1004
1005 if (tp_features.hotkey_mask) {
1006 /* MHKA available in A31, R40, R40e, T4x, X31, and later */
1007 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1008 "MHKA", "qd"))
1009 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
1010 }
1011
1012 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
1013 if (!res && tp_features.hotkey_mask) {
1014 res = add_many_to_attr_set(hotkey_dev_attributes,
1015 hotkey_mask_attributes,
1016 ARRAY_SIZE(hotkey_mask_attributes));
1017 }
1018
1019 /* Not all thinkpads have a hardware radio switch */
1020 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1021 tp_features.hotkey_wlsw = 1;
1022 printk(IBM_INFO
1023 "radio switch found; radios are %s\n",
1024 enabled(status, 0));
1025 res = add_to_attr_set(hotkey_dev_attributes,
1026 &dev_attr_hotkey_radio_sw.attr);
1027 }
1028
1029 if (!res)
1030 res = register_attr_set_with_sysfs(
1031 hotkey_dev_attributes,
1032 &tpacpi_pdev->dev.kobj);
1033 if (res)
1034 return res;
1035
1036 /* Set up key map */
1037
1038 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1039 GFP_KERNEL);
1040 if (!hotkey_keycode_map) {
1041 printk(IBM_ERR "failed to allocate memory for key map\n");
1042 return -ENOMEM;
1043 }
1044
1045 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1046 dbg_printk(TPACPI_DBG_INIT,
1047 "using Lenovo default hot key map\n");
1048 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1049 TPACPI_HOTKEY_MAP_SIZE);
1050 } else {
1051 dbg_printk(TPACPI_DBG_INIT,
1052 "using IBM default hot key map\n");
1053 memcpy(hotkey_keycode_map, &ibm_keycode_map,
1054 TPACPI_HOTKEY_MAP_SIZE);
1055 }
1056
1057 #ifndef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
1058 for (i = 0; i < 12; i++)
1059 hotkey_keycode_map[i] = KEY_UNKNOWN;
1060 #endif /* ! CONFIG_THINKPAD_ACPI_INPUT_ENABLED */
1061
1062 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1063 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1064 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1065 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1066 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1067 tpacpi_inputdev->keycode = hotkey_keycode_map;
1068 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1069 if (hotkey_keycode_map[i] != KEY_RESERVED) {
1070 set_bit(hotkey_keycode_map[i],
1071 tpacpi_inputdev->keybit);
1072 } else {
1073 if (i < sizeof(hotkey_reserved_mask)*8)
1074 hotkey_reserved_mask |= 1 << i;
1075 }
1076 }
1077
1078 if (tp_features.hotkey_wlsw) {
1079 set_bit(EV_SW, tpacpi_inputdev->evbit);
1080 set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1081 }
1082
1083 #ifdef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
1084 dbg_printk(TPACPI_DBG_INIT,
1085 "enabling hot key handling\n");
1086 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1087 | hotkey_orig_mask);
1088 if (res)
1089 return res;
1090 #endif /* CONFIG_THINKPAD_ACPI_INPUT_ENABLED */
1091 }
1092
1093 return (tp_features.hotkey)? 0 : 1;
1094 }
1095
1096 static void hotkey_exit(void)
1097 {
1098 int res;
1099
1100 if (tp_features.hotkey) {
1101 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1102 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1103 if (res)
1104 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1105 }
1106
1107 if (hotkey_dev_attributes) {
1108 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1109 hotkey_dev_attributes = NULL;
1110 }
1111 }
1112
1113 static void tpacpi_input_send_key(unsigned int scancode,
1114 unsigned int keycode)
1115 {
1116 if (keycode != KEY_RESERVED) {
1117 input_report_key(tpacpi_inputdev, keycode, 1);
1118 if (keycode == KEY_UNKNOWN)
1119 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1120 scancode);
1121 input_sync(tpacpi_inputdev);
1122
1123 input_report_key(tpacpi_inputdev, keycode, 0);
1124 if (keycode == KEY_UNKNOWN)
1125 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1126 scancode);
1127 input_sync(tpacpi_inputdev);
1128 }
1129 }
1130
1131 static void tpacpi_input_send_radiosw(void)
1132 {
1133 int wlsw;
1134
1135 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw))
1136 input_report_switch(tpacpi_inputdev,
1137 SW_RADIO, !!wlsw);
1138 }
1139
1140 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1141 {
1142 u32 hkey;
1143 unsigned int keycode, scancode;
1144 int sendacpi = 1;
1145
1146 if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1147 if (tpacpi_inputdev->users > 0) {
1148 switch (hkey >> 12) {
1149 case 1:
1150 /* 0x1000-0x1FFF: key presses */
1151 scancode = hkey & 0xfff;
1152 if (scancode > 0 && scancode < 0x21) {
1153 scancode--;
1154 keycode = hotkey_keycode_map[scancode];
1155 tpacpi_input_send_key(scancode, keycode);
1156 sendacpi = (keycode == KEY_RESERVED
1157 || keycode == KEY_UNKNOWN);
1158 } else {
1159 printk(IBM_ERR
1160 "hotkey 0x%04x out of range for keyboard map\n",
1161 hkey);
1162 }
1163 break;
1164 case 5:
1165 /* 0x5000-0x5FFF: LID */
1166 /* we don't handle it through this path, just
1167 * eat up known LID events */
1168 if (hkey != 0x5001 && hkey != 0x5002) {
1169 printk(IBM_ERR
1170 "unknown LID-related hotkey event: 0x%04x\n",
1171 hkey);
1172 }
1173 break;
1174 case 7:
1175 /* 0x7000-0x7FFF: misc */
1176 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1177 tpacpi_input_send_radiosw();
1178 sendacpi = 0;
1179 break;
1180 }
1181 /* fallthrough to default */
1182 default:
1183 /* case 2: dock-related */
1184 /* 0x2305 - T43 waking up due to bay lever eject while aslept */
1185 /* case 3: ultra-bay related. maybe bay in dock? */
1186 /* 0x3003 - T43 after wake up by bay lever eject (0x2305) */
1187 printk(IBM_NOTICE "unhandled hotkey event 0x%04x\n", hkey);
1188 }
1189 }
1190
1191 if (sendacpi)
1192 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
1193 } else {
1194 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
1195 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1196 }
1197 }
1198
1199 static void hotkey_resume(void)
1200 {
1201 tpacpi_input_send_radiosw();
1202 }
1203
1204 /*
1205 * Call with hotkey_mutex held
1206 */
1207 static int hotkey_get(int *status, u32 *mask)
1208 {
1209 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1210 return -EIO;
1211
1212 if (tp_features.hotkey_mask)
1213 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1214 return -EIO;
1215
1216 return 0;
1217 }
1218
1219 /*
1220 * Call with hotkey_mutex held
1221 */
1222 static int hotkey_set(int status, u32 mask)
1223 {
1224 int i;
1225
1226 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1227 return -EIO;
1228
1229 if (tp_features.hotkey_mask)
1230 for (i = 0; i < 32; i++) {
1231 int bit = ((1 << i) & mask) != 0;
1232 if (!acpi_evalf(hkey_handle,
1233 NULL, "MHKM", "vdd", i + 1, bit))
1234 return -EIO;
1235 }
1236
1237 return 0;
1238 }
1239
1240 /* procfs -------------------------------------------------------------- */
1241 static int hotkey_read(char *p)
1242 {
1243 int res, status;
1244 u32 mask;
1245 int len = 0;
1246
1247 if (!tp_features.hotkey) {
1248 len += sprintf(p + len, "status:\t\tnot supported\n");
1249 return len;
1250 }
1251
1252 res = mutex_lock_interruptible(&hotkey_mutex);
1253 if (res < 0)
1254 return res;
1255 res = hotkey_get(&status, &mask);
1256 mutex_unlock(&hotkey_mutex);
1257 if (res)
1258 return res;
1259
1260 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1261 if (tp_features.hotkey_mask) {
1262 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1263 len += sprintf(p + len,
1264 "commands:\tenable, disable, reset, <mask>\n");
1265 } else {
1266 len += sprintf(p + len, "mask:\t\tnot supported\n");
1267 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1268 }
1269
1270 return len;
1271 }
1272
1273 static int hotkey_write(char *buf)
1274 {
1275 int res, status;
1276 u32 mask;
1277 char *cmd;
1278 int do_cmd = 0;
1279
1280 if (!tp_features.hotkey)
1281 return -ENODEV;
1282
1283 res = mutex_lock_interruptible(&hotkey_mutex);
1284 if (res < 0)
1285 return res;
1286
1287 res = hotkey_get(&status, &mask);
1288 if (res)
1289 goto errexit;
1290
1291 res = 0;
1292 while ((cmd = next_cmd(&buf))) {
1293 if (strlencmp(cmd, "enable") == 0) {
1294 status = 1;
1295 } else if (strlencmp(cmd, "disable") == 0) {
1296 status = 0;
1297 } else if (strlencmp(cmd, "reset") == 0) {
1298 status = hotkey_orig_status;
1299 mask = hotkey_orig_mask;
1300 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1301 /* mask set */
1302 } else if (sscanf(cmd, "%x", &mask) == 1) {
1303 /* mask set */
1304 } else {
1305 res = -EINVAL;
1306 goto errexit;
1307 }
1308 do_cmd = 1;
1309 }
1310
1311 if (do_cmd)
1312 res = hotkey_set(status, mask);
1313
1314 errexit:
1315 mutex_unlock(&hotkey_mutex);
1316 return res;
1317 }
1318
1319 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1320 .hid = IBM_HKEY_HID,
1321 .notify = hotkey_notify,
1322 .handle = &hkey_handle,
1323 .type = ACPI_DEVICE_NOTIFY,
1324 };
1325
1326 static struct ibm_struct hotkey_driver_data = {
1327 .name = "hotkey",
1328 .read = hotkey_read,
1329 .write = hotkey_write,
1330 .exit = hotkey_exit,
1331 .resume = hotkey_resume,
1332 .acpi = &ibm_hotkey_acpidriver,
1333 };
1334
1335 /*************************************************************************
1336 * Bluetooth subdriver
1337 */
1338
1339 /* sysfs bluetooth enable ---------------------------------------------- */
1340 static ssize_t bluetooth_enable_show(struct device *dev,
1341 struct device_attribute *attr,
1342 char *buf)
1343 {
1344 int status;
1345
1346 status = bluetooth_get_radiosw();
1347 if (status < 0)
1348 return status;
1349
1350 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1351 }
1352
1353 static ssize_t bluetooth_enable_store(struct device *dev,
1354 struct device_attribute *attr,
1355 const char *buf, size_t count)
1356 {
1357 unsigned long t;
1358 int res;
1359
1360 if (parse_strtoul(buf, 1, &t))
1361 return -EINVAL;
1362
1363 res = bluetooth_set_radiosw(t);
1364
1365 return (res) ? res : count;
1366 }
1367
1368 static struct device_attribute dev_attr_bluetooth_enable =
1369 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1370 bluetooth_enable_show, bluetooth_enable_store);
1371
1372 /* --------------------------------------------------------------------- */
1373
1374 static struct attribute *bluetooth_attributes[] = {
1375 &dev_attr_bluetooth_enable.attr,
1376 NULL
1377 };
1378
1379 static const struct attribute_group bluetooth_attr_group = {
1380 .attrs = bluetooth_attributes,
1381 };
1382
1383 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1384 {
1385 int res;
1386 int status = 0;
1387
1388 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1389
1390 IBM_ACPIHANDLE_INIT(hkey);
1391
1392 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1393 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1394 tp_features.bluetooth = hkey_handle &&
1395 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1396
1397 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1398 str_supported(tp_features.bluetooth),
1399 status);
1400
1401 if (tp_features.bluetooth) {
1402 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1403 /* no bluetooth hardware present in system */
1404 tp_features.bluetooth = 0;
1405 dbg_printk(TPACPI_DBG_INIT,
1406 "bluetooth hardware not installed\n");
1407 } else {
1408 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1409 &bluetooth_attr_group);
1410 if (res)
1411 return res;
1412 }
1413 }
1414
1415 return (tp_features.bluetooth)? 0 : 1;
1416 }
1417
1418 static void bluetooth_exit(void)
1419 {
1420 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1421 &bluetooth_attr_group);
1422 }
1423
1424 static int bluetooth_get_radiosw(void)
1425 {
1426 int status;
1427
1428 if (!tp_features.bluetooth)
1429 return -ENODEV;
1430
1431 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1432 return -EIO;
1433
1434 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1435 }
1436
1437 static int bluetooth_set_radiosw(int radio_on)
1438 {
1439 int status;
1440
1441 if (!tp_features.bluetooth)
1442 return -ENODEV;
1443
1444 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1445 return -EIO;
1446 if (radio_on)
1447 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1448 else
1449 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1450 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1451 return -EIO;
1452
1453 return 0;
1454 }
1455
1456 /* procfs -------------------------------------------------------------- */
1457 static int bluetooth_read(char *p)
1458 {
1459 int len = 0;
1460 int status = bluetooth_get_radiosw();
1461
1462 if (!tp_features.bluetooth)
1463 len += sprintf(p + len, "status:\t\tnot supported\n");
1464 else {
1465 len += sprintf(p + len, "status:\t\t%s\n",
1466 (status)? "enabled" : "disabled");
1467 len += sprintf(p + len, "commands:\tenable, disable\n");
1468 }
1469
1470 return len;
1471 }
1472
1473 static int bluetooth_write(char *buf)
1474 {
1475 char *cmd;
1476
1477 if (!tp_features.bluetooth)
1478 return -ENODEV;
1479
1480 while ((cmd = next_cmd(&buf))) {
1481 if (strlencmp(cmd, "enable") == 0) {
1482 bluetooth_set_radiosw(1);
1483 } else if (strlencmp(cmd, "disable") == 0) {
1484 bluetooth_set_radiosw(0);
1485 } else
1486 return -EINVAL;
1487 }
1488
1489 return 0;
1490 }
1491
1492 static struct ibm_struct bluetooth_driver_data = {
1493 .name = "bluetooth",
1494 .read = bluetooth_read,
1495 .write = bluetooth_write,
1496 .exit = bluetooth_exit,
1497 };
1498
1499 /*************************************************************************
1500 * Wan subdriver
1501 */
1502
1503 /* sysfs wan enable ---------------------------------------------------- */
1504 static ssize_t wan_enable_show(struct device *dev,
1505 struct device_attribute *attr,
1506 char *buf)
1507 {
1508 int status;
1509
1510 status = wan_get_radiosw();
1511 if (status < 0)
1512 return status;
1513
1514 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1515 }
1516
1517 static ssize_t wan_enable_store(struct device *dev,
1518 struct device_attribute *attr,
1519 const char *buf, size_t count)
1520 {
1521 unsigned long t;
1522 int res;
1523
1524 if (parse_strtoul(buf, 1, &t))
1525 return -EINVAL;
1526
1527 res = wan_set_radiosw(t);
1528
1529 return (res) ? res : count;
1530 }
1531
1532 static struct device_attribute dev_attr_wan_enable =
1533 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1534 wan_enable_show, wan_enable_store);
1535
1536 /* --------------------------------------------------------------------- */
1537
1538 static struct attribute *wan_attributes[] = {
1539 &dev_attr_wan_enable.attr,
1540 NULL
1541 };
1542
1543 static const struct attribute_group wan_attr_group = {
1544 .attrs = wan_attributes,
1545 };
1546
1547 static int __init wan_init(struct ibm_init_struct *iibm)
1548 {
1549 int res;
1550 int status = 0;
1551
1552 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1553
1554 IBM_ACPIHANDLE_INIT(hkey);
1555
1556 tp_features.wan = hkey_handle &&
1557 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1558
1559 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1560 str_supported(tp_features.wan),
1561 status);
1562
1563 if (tp_features.wan) {
1564 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1565 /* no wan hardware present in system */
1566 tp_features.wan = 0;
1567 dbg_printk(TPACPI_DBG_INIT,
1568 "wan hardware not installed\n");
1569 } else {
1570 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1571 &wan_attr_group);
1572 if (res)
1573 return res;
1574 }
1575 }
1576
1577 return (tp_features.wan)? 0 : 1;
1578 }
1579
1580 static void wan_exit(void)
1581 {
1582 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1583 &wan_attr_group);
1584 }
1585
1586 static int wan_get_radiosw(void)
1587 {
1588 int status;
1589
1590 if (!tp_features.wan)
1591 return -ENODEV;
1592
1593 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1594 return -EIO;
1595
1596 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1597 }
1598
1599 static int wan_set_radiosw(int radio_on)
1600 {
1601 int status;
1602
1603 if (!tp_features.wan)
1604 return -ENODEV;
1605
1606 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1607 return -EIO;
1608 if (radio_on)
1609 status |= TP_ACPI_WANCARD_RADIOSSW;
1610 else
1611 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1612 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1613 return -EIO;
1614
1615 return 0;
1616 }
1617
1618 /* procfs -------------------------------------------------------------- */
1619 static int wan_read(char *p)
1620 {
1621 int len = 0;
1622 int status = wan_get_radiosw();
1623
1624 if (!tp_features.wan)
1625 len += sprintf(p + len, "status:\t\tnot supported\n");
1626 else {
1627 len += sprintf(p + len, "status:\t\t%s\n",
1628 (status)? "enabled" : "disabled");
1629 len += sprintf(p + len, "commands:\tenable, disable\n");
1630 }
1631
1632 return len;
1633 }
1634
1635 static int wan_write(char *buf)
1636 {
1637 char *cmd;
1638
1639 if (!tp_features.wan)
1640 return -ENODEV;
1641
1642 while ((cmd = next_cmd(&buf))) {
1643 if (strlencmp(cmd, "enable") == 0) {
1644 wan_set_radiosw(1);
1645 } else if (strlencmp(cmd, "disable") == 0) {
1646 wan_set_radiosw(0);
1647 } else
1648 return -EINVAL;
1649 }
1650
1651 return 0;
1652 }
1653
1654 static struct ibm_struct wan_driver_data = {
1655 .name = "wan",
1656 .read = wan_read,
1657 .write = wan_write,
1658 .exit = wan_exit,
1659 .flags.experimental = 1,
1660 };
1661
1662 /*************************************************************************
1663 * Video subdriver
1664 */
1665
1666 static enum video_access_mode video_supported;
1667 static int video_orig_autosw;
1668
1669 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1670 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1671 "\\_SB.PCI0.VID0", /* 770e */
1672 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1673 "\\_SB.PCI0.AGP.VID", /* all others */
1674 ); /* R30, R31 */
1675
1676 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1677
1678 static int __init video_init(struct ibm_init_struct *iibm)
1679 {
1680 int ivga;
1681
1682 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1683
1684 IBM_ACPIHANDLE_INIT(vid);
1685 IBM_ACPIHANDLE_INIT(vid2);
1686
1687 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1688 /* G41, assume IVGA doesn't change */
1689 vid_handle = vid2_handle;
1690
1691 if (!vid_handle)
1692 /* video switching not supported on R30, R31 */
1693 video_supported = TPACPI_VIDEO_NONE;
1694 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1695 /* 570 */
1696 video_supported = TPACPI_VIDEO_570;
1697 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1698 /* 600e/x, 770e, 770x */
1699 video_supported = TPACPI_VIDEO_770;
1700 else
1701 /* all others */
1702 video_supported = TPACPI_VIDEO_NEW;
1703
1704 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1705 str_supported(video_supported != TPACPI_VIDEO_NONE),
1706 video_supported);
1707
1708 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1709 }
1710
1711 static void video_exit(void)
1712 {
1713 dbg_printk(TPACPI_DBG_EXIT,
1714 "restoring original video autoswitch mode\n");
1715 if (video_autosw_set(video_orig_autosw))
1716 printk(IBM_ERR "error while trying to restore original "
1717 "video autoswitch mode\n");
1718 }
1719
1720 static int video_outputsw_get(void)
1721 {
1722 int status = 0;
1723 int i;
1724
1725 switch (video_supported) {
1726 case TPACPI_VIDEO_570:
1727 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1728 TP_ACPI_VIDEO_570_PHSCMD))
1729 return -EIO;
1730 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1731 break;
1732 case TPACPI_VIDEO_770:
1733 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1734 return -EIO;
1735 if (i)
1736 status |= TP_ACPI_VIDEO_S_LCD;
1737 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1738 return -EIO;
1739 if (i)
1740 status |= TP_ACPI_VIDEO_S_CRT;
1741 break;
1742 case TPACPI_VIDEO_NEW:
1743 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1744 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1745 return -EIO;
1746 if (i)
1747 status |= TP_ACPI_VIDEO_S_CRT;
1748
1749 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1750 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1751 return -EIO;
1752 if (i)
1753 status |= TP_ACPI_VIDEO_S_LCD;
1754 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1755 return -EIO;
1756 if (i)
1757 status |= TP_ACPI_VIDEO_S_DVI;
1758 break;
1759 default:
1760 return -ENOSYS;
1761 }
1762
1763 return status;
1764 }
1765
1766 static int video_outputsw_set(int status)
1767 {
1768 int autosw;
1769 int res = 0;
1770
1771 switch (video_supported) {
1772 case TPACPI_VIDEO_570:
1773 res = acpi_evalf(NULL, NULL,
1774 "\\_SB.PHS2", "vdd",
1775 TP_ACPI_VIDEO_570_PHS2CMD,
1776 status | TP_ACPI_VIDEO_570_PHS2SET);
1777 break;
1778 case TPACPI_VIDEO_770:
1779 autosw = video_autosw_get();
1780 if (autosw < 0)
1781 return autosw;
1782
1783 res = video_autosw_set(1);
1784 if (res)
1785 return res;
1786 res = acpi_evalf(vid_handle, NULL,
1787 "ASWT", "vdd", status * 0x100, 0);
1788 if (!autosw && video_autosw_set(autosw)) {
1789 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1790 return -EIO;
1791 }
1792 break;
1793 case TPACPI_VIDEO_NEW:
1794 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1795 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1796 break;
1797 default:
1798 return -ENOSYS;
1799 }
1800
1801 return (res)? 0 : -EIO;
1802 }
1803
1804 static int video_autosw_get(void)
1805 {
1806 int autosw = 0;
1807
1808 switch (video_supported) {
1809 case TPACPI_VIDEO_570:
1810 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1811 return -EIO;
1812 break;
1813 case TPACPI_VIDEO_770:
1814 case TPACPI_VIDEO_NEW:
1815 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1816 return -EIO;
1817 break;
1818 default:
1819 return -ENOSYS;
1820 }
1821
1822 return autosw & 1;
1823 }
1824
1825 static int video_autosw_set(int enable)
1826 {
1827 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1828 return -EIO;
1829 return 0;
1830 }
1831
1832 static int video_outputsw_cycle(void)
1833 {
1834 int autosw = video_autosw_get();
1835 int res;
1836
1837 if (autosw < 0)
1838 return autosw;
1839
1840 switch (video_supported) {
1841 case TPACPI_VIDEO_570:
1842 res = video_autosw_set(1);
1843 if (res)
1844 return res;
1845 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1846 break;
1847 case TPACPI_VIDEO_770:
1848 case TPACPI_VIDEO_NEW:
1849 res = video_autosw_set(1);
1850 if (res)
1851 return res;
1852 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1853 break;
1854 default:
1855 return -ENOSYS;
1856 }
1857 if (!autosw && video_autosw_set(autosw)) {
1858 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1859 return -EIO;
1860 }
1861
1862 return (res)? 0 : -EIO;
1863 }
1864
1865 static int video_expand_toggle(void)
1866 {
1867 switch (video_supported) {
1868 case TPACPI_VIDEO_570:
1869 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1870 0 : -EIO;
1871 case TPACPI_VIDEO_770:
1872 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1873 0 : -EIO;
1874 case TPACPI_VIDEO_NEW:
1875 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1876 0 : -EIO;
1877 default:
1878 return -ENOSYS;
1879 }
1880 /* not reached */
1881 }
1882
1883 static int video_read(char *p)
1884 {
1885 int status, autosw;
1886 int len = 0;
1887
1888 if (video_supported == TPACPI_VIDEO_NONE) {
1889 len += sprintf(p + len, "status:\t\tnot supported\n");
1890 return len;
1891 }
1892
1893 status = video_outputsw_get();
1894 if (status < 0)
1895 return status;
1896
1897 autosw = video_autosw_get();
1898 if (autosw < 0)
1899 return autosw;
1900
1901 len += sprintf(p + len, "status:\t\tsupported\n");
1902 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1903 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1904 if (video_supported == TPACPI_VIDEO_NEW)
1905 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1906 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1907 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1908 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1909 if (video_supported == TPACPI_VIDEO_NEW)
1910 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1911 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1912 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1913
1914 return len;
1915 }
1916
1917 static int video_write(char *buf)
1918 {
1919 char *cmd;
1920 int enable, disable, status;
1921 int res;
1922
1923 if (video_supported == TPACPI_VIDEO_NONE)
1924 return -ENODEV;
1925
1926 enable = 0;
1927 disable = 0;
1928
1929 while ((cmd = next_cmd(&buf))) {
1930 if (strlencmp(cmd, "lcd_enable") == 0) {
1931 enable |= TP_ACPI_VIDEO_S_LCD;
1932 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1933 disable |= TP_ACPI_VIDEO_S_LCD;
1934 } else if (strlencmp(cmd, "crt_enable") == 0) {
1935 enable |= TP_ACPI_VIDEO_S_CRT;
1936 } else if (strlencmp(cmd, "crt_disable") == 0) {
1937 disable |= TP_ACPI_VIDEO_S_CRT;
1938 } else if (video_supported == TPACPI_VIDEO_NEW &&
1939 strlencmp(cmd, "dvi_enable") == 0) {
1940 enable |= TP_ACPI_VIDEO_S_DVI;
1941 } else if (video_supported == TPACPI_VIDEO_NEW &&
1942 strlencmp(cmd, "dvi_disable") == 0) {
1943 disable |= TP_ACPI_VIDEO_S_DVI;
1944 } else if (strlencmp(cmd, "auto_enable") == 0) {
1945 res = video_autosw_set(1);
1946 if (res)
1947 return res;
1948 } else if (strlencmp(cmd, "auto_disable") == 0) {
1949 res = video_autosw_set(0);
1950 if (res)
1951 return res;
1952 } else if (strlencmp(cmd, "video_switch") == 0) {
1953 res = video_outputsw_cycle();
1954 if (res)
1955 return res;
1956 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1957 res = video_expand_toggle();
1958 if (res)
1959 return res;
1960 } else
1961 return -EINVAL;
1962 }
1963
1964 if (enable || disable) {
1965 status = video_outputsw_get();
1966 if (status < 0)
1967 return status;
1968 res = video_outputsw_set((status & ~disable) | enable);
1969 if (res)
1970 return res;
1971 }
1972
1973 return 0;
1974 }
1975
1976 static struct ibm_struct video_driver_data = {
1977 .name = "video",
1978 .read = video_read,
1979 .write = video_write,
1980 .exit = video_exit,
1981 };
1982
1983 /*************************************************************************
1984 * Light (thinklight) subdriver
1985 */
1986
1987 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1988 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1989
1990 static int __init light_init(struct ibm_init_struct *iibm)
1991 {
1992 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1993
1994 IBM_ACPIHANDLE_INIT(ledb);
1995 IBM_ACPIHANDLE_INIT(lght);
1996 IBM_ACPIHANDLE_INIT(cmos);
1997
1998 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1999 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
2000
2001 if (tp_features.light)
2002 /* light status not supported on
2003 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
2004 tp_features.light_status =
2005 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
2006
2007 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
2008 str_supported(tp_features.light));
2009
2010 return (tp_features.light)? 0 : 1;
2011 }
2012
2013 static int light_read(char *p)
2014 {
2015 int len = 0;
2016 int status = 0;
2017
2018 if (!tp_features.light) {
2019 len += sprintf(p + len, "status:\t\tnot supported\n");
2020 } else if (!tp_features.light_status) {
2021 len += sprintf(p + len, "status:\t\tunknown\n");
2022 len += sprintf(p + len, "commands:\ton, off\n");
2023 } else {
2024 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
2025 return -EIO;
2026 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
2027 len += sprintf(p + len, "commands:\ton, off\n");
2028 }
2029
2030 return len;
2031 }
2032
2033 static int light_write(char *buf)
2034 {
2035 int cmos_cmd, lght_cmd;
2036 char *cmd;
2037 int success;
2038
2039 if (!tp_features.light)
2040 return -ENODEV;
2041
2042 while ((cmd = next_cmd(&buf))) {
2043 if (strlencmp(cmd, "on") == 0) {
2044 cmos_cmd = 0x0c;
2045 lght_cmd = 1;
2046 } else if (strlencmp(cmd, "off") == 0) {
2047 cmos_cmd = 0x0d;
2048 lght_cmd = 0;
2049 } else
2050 return -EINVAL;
2051
2052 success = cmos_handle ?
2053 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2054 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2055 if (!success)
2056 return -EIO;
2057 }
2058
2059 return 0;
2060 }
2061
2062 static struct ibm_struct light_driver_data = {
2063 .name = "light",
2064 .read = light_read,
2065 .write = light_write,
2066 };
2067
2068 /*************************************************************************
2069 * Dock subdriver
2070 */
2071
2072 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2073
2074 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
2075 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2076 "\\_SB.PCI0.PCI1.DOCK", /* all others */
2077 "\\_SB.PCI.ISA.SLCE", /* 570 */
2078 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2079
2080 /* don't list other alternatives as we install a notify handler on the 570 */
2081 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
2082
2083 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2084 {
2085 .notify = dock_notify,
2086 .handle = &dock_handle,
2087 .type = ACPI_SYSTEM_NOTIFY,
2088 },
2089 {
2090 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2091 * We just use it to get notifications of dock hotplug
2092 * in very old thinkpads */
2093 .hid = PCI_ROOT_HID_STRING,
2094 .notify = dock_notify,
2095 .handle = &pci_handle,
2096 .type = ACPI_SYSTEM_NOTIFY,
2097 },
2098 };
2099
2100 static struct ibm_struct dock_driver_data[2] = {
2101 {
2102 .name = "dock",
2103 .read = dock_read,
2104 .write = dock_write,
2105 .acpi = &ibm_dock_acpidriver[0],
2106 },
2107 {
2108 .name = "dock",
2109 .acpi = &ibm_dock_acpidriver[1],
2110 },
2111 };
2112
2113 #define dock_docked() (_sta(dock_handle) & 1)
2114
2115 static int __init dock_init(struct ibm_init_struct *iibm)
2116 {
2117 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2118
2119 IBM_ACPIHANDLE_INIT(dock);
2120
2121 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2122 str_supported(dock_handle != NULL));
2123
2124 return (dock_handle)? 0 : 1;
2125 }
2126
2127 static int __init dock_init2(struct ibm_init_struct *iibm)
2128 {
2129 int dock2_needed;
2130
2131 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2132
2133 if (dock_driver_data[0].flags.acpi_driver_registered &&
2134 dock_driver_data[0].flags.acpi_notify_installed) {
2135 IBM_ACPIHANDLE_INIT(pci);
2136 dock2_needed = (pci_handle != NULL);
2137 vdbg_printk(TPACPI_DBG_INIT,
2138 "dock PCI handler for the TP 570 is %s\n",
2139 str_supported(dock2_needed));
2140 } else {
2141 vdbg_printk(TPACPI_DBG_INIT,
2142 "dock subdriver part 2 not required\n");
2143 dock2_needed = 0;
2144 }
2145
2146 return (dock2_needed)? 0 : 1;
2147 }
2148
2149 static void dock_notify(struct ibm_struct *ibm, u32 event)
2150 {
2151 int docked = dock_docked();
2152 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, PCI_ROOT_HID_STRING);
2153
2154 if (event == 1 && !pci) /* 570 */
2155 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
2156 else if (event == 1 && pci) /* 570 */
2157 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
2158 else if (event == 3 && docked)
2159 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
2160 else if (event == 3 && !docked)
2161 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
2162 else if (event == 0 && docked)
2163 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
2164 else {
2165 printk(IBM_ERR "unknown dock event %d, status %d\n",
2166 event, _sta(dock_handle));
2167 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
2168 }
2169 }
2170
2171 static int dock_read(char *p)
2172 {
2173 int len = 0;
2174 int docked = dock_docked();
2175
2176 if (!dock_handle)
2177 len += sprintf(p + len, "status:\t\tnot supported\n");
2178 else if (!docked)
2179 len += sprintf(p + len, "status:\t\tundocked\n");
2180 else {
2181 len += sprintf(p + len, "status:\t\tdocked\n");
2182 len += sprintf(p + len, "commands:\tdock, undock\n");
2183 }
2184
2185 return len;
2186 }
2187
2188 static int dock_write(char *buf)
2189 {
2190 char *cmd;
2191
2192 if (!dock_docked())
2193 return -ENODEV;
2194
2195 while ((cmd = next_cmd(&buf))) {
2196 if (strlencmp(cmd, "undock") == 0) {
2197 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2198 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2199 return -EIO;
2200 } else if (strlencmp(cmd, "dock") == 0) {
2201 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2202 return -EIO;
2203 } else
2204 return -EINVAL;
2205 }
2206
2207 return 0;
2208 }
2209
2210 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2211
2212 /*************************************************************************
2213 * Bay subdriver
2214 */
2215
2216 #ifdef CONFIG_THINKPAD_ACPI_BAY
2217 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
2218 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2219 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2220 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2221 ); /* A21e, R30, R31 */
2222 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2223 "_EJ0", /* all others */
2224 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2225 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
2226 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2227 ); /* all others */
2228 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
2229 "_EJ0", /* 770x */
2230 ); /* all others */
2231
2232 static int __init bay_init(struct ibm_init_struct *iibm)
2233 {
2234 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2235
2236 IBM_ACPIHANDLE_INIT(bay);
2237 if (bay_handle)
2238 IBM_ACPIHANDLE_INIT(bay_ej);
2239 IBM_ACPIHANDLE_INIT(bay2);
2240 if (bay2_handle)
2241 IBM_ACPIHANDLE_INIT(bay2_ej);
2242
2243 tp_features.bay_status = bay_handle &&
2244 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2245 tp_features.bay_status2 = bay2_handle &&
2246 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2247
2248 tp_features.bay_eject = bay_handle && bay_ej_handle &&
2249 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2250 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2251 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2252
2253 vdbg_printk(TPACPI_DBG_INIT,
2254 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2255 str_supported(tp_features.bay_status),
2256 str_supported(tp_features.bay_eject),
2257 str_supported(tp_features.bay_status2),
2258 str_supported(tp_features.bay_eject2));
2259
2260 return (tp_features.bay_status || tp_features.bay_eject ||
2261 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2262 }
2263
2264 static void bay_notify(struct ibm_struct *ibm, u32 event)
2265 {
2266 acpi_bus_generate_event(ibm->acpi->device, event, 0);
2267 }
2268
2269 #define bay_occupied(b) (_sta(b##_handle) & 1)
2270
2271 static int bay_read(char *p)
2272 {
2273 int len = 0;
2274 int occupied = bay_occupied(bay);
2275 int occupied2 = bay_occupied(bay2);
2276 int eject, eject2;
2277
2278 len += sprintf(p + len, "status:\t\t%s\n",
2279 tp_features.bay_status ?
2280 (occupied ? "occupied" : "unoccupied") :
2281 "not supported");
2282 if (tp_features.bay_status2)
2283 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2284 "occupied" : "unoccupied");
2285
2286 eject = tp_features.bay_eject && occupied;
2287 eject2 = tp_features.bay_eject2 && occupied2;
2288
2289 if (eject && eject2)
2290 len += sprintf(p + len, "commands:\teject, eject2\n");
2291 else if (eject)
2292 len += sprintf(p + len, "commands:\teject\n");
2293 else if (eject2)
2294 len += sprintf(p + len, "commands:\teject2\n");
2295
2296 return len;
2297 }
2298
2299 static int bay_write(char *buf)
2300 {
2301 char *cmd;
2302
2303 if (!tp_features.bay_eject && !tp_features.bay_eject2)
2304 return -ENODEV;
2305
2306 while ((cmd = next_cmd(&buf))) {
2307 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2308 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2309 return -EIO;
2310 } else if (tp_features.bay_eject2 &&
2311 strlencmp(cmd, "eject2") == 0) {
2312 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2313 return -EIO;
2314 } else
2315 return -EINVAL;
2316 }
2317
2318 return 0;
2319 }
2320
2321 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2322 .notify = bay_notify,
2323 .handle = &bay_handle,
2324 .type = ACPI_SYSTEM_NOTIFY,
2325 };
2326
2327 static struct ibm_struct bay_driver_data = {
2328 .name = "bay",
2329 .read = bay_read,
2330 .write = bay_write,
2331 .acpi = &ibm_bay_acpidriver,
2332 };
2333
2334 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2335
2336 /*************************************************************************
2337 * CMOS subdriver
2338 */
2339
2340 /* sysfs cmos_command -------------------------------------------------- */
2341 static ssize_t cmos_command_store(struct device *dev,
2342 struct device_attribute *attr,
2343 const char *buf, size_t count)
2344 {
2345 unsigned long cmos_cmd;
2346 int res;
2347
2348 if (parse_strtoul(buf, 21, &cmos_cmd))
2349 return -EINVAL;
2350
2351 res = issue_thinkpad_cmos_command(cmos_cmd);
2352 return (res)? res : count;
2353 }
2354
2355 static struct device_attribute dev_attr_cmos_command =
2356 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2357
2358 /* --------------------------------------------------------------------- */
2359
2360 static int __init cmos_init(struct ibm_init_struct *iibm)
2361 {
2362 int res;
2363
2364 vdbg_printk(TPACPI_DBG_INIT,
2365 "initializing cmos commands subdriver\n");
2366
2367 IBM_ACPIHANDLE_INIT(cmos);
2368
2369 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2370 str_supported(cmos_handle != NULL));
2371
2372 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2373 if (res)
2374 return res;
2375
2376 return (cmos_handle)? 0 : 1;
2377 }
2378
2379 static void cmos_exit(void)
2380 {
2381 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2382 }
2383
2384 static int cmos_read(char *p)
2385 {
2386 int len = 0;
2387
2388 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2389 R30, R31, T20-22, X20-21 */
2390 if (!cmos_handle)
2391 len += sprintf(p + len, "status:\t\tnot supported\n");
2392 else {
2393 len += sprintf(p + len, "status:\t\tsupported\n");
2394 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2395 }
2396
2397 return len;
2398 }
2399
2400 static int cmos_write(char *buf)
2401 {
2402 char *cmd;
2403 int cmos_cmd, res;
2404
2405 while ((cmd = next_cmd(&buf))) {
2406 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2407 cmos_cmd >= 0 && cmos_cmd <= 21) {
2408 /* cmos_cmd set */
2409 } else
2410 return -EINVAL;
2411
2412 res = issue_thinkpad_cmos_command(cmos_cmd);
2413 if (res)
2414 return res;
2415 }
2416
2417 return 0;
2418 }
2419
2420 static struct ibm_struct cmos_driver_data = {
2421 .name = "cmos",
2422 .read = cmos_read,
2423 .write = cmos_write,
2424 .exit = cmos_exit,
2425 };
2426
2427 /*************************************************************************
2428 * LED subdriver
2429 */
2430
2431 static enum led_access_mode led_supported;
2432
2433 IBM_HANDLE(led, ec, "SLED", /* 570 */
2434 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2435 "LED", /* all others */
2436 ); /* R30, R31 */
2437
2438 static int __init led_init(struct ibm_init_struct *iibm)
2439 {
2440 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2441
2442 IBM_ACPIHANDLE_INIT(led);
2443
2444 if (!led_handle)
2445 /* led not supported on R30, R31 */
2446 led_supported = TPACPI_LED_NONE;
2447 else if (strlencmp(led_path, "SLED") == 0)
2448 /* 570 */
2449 led_supported = TPACPI_LED_570;
2450 else if (strlencmp(led_path, "SYSL") == 0)
2451 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2452 led_supported = TPACPI_LED_OLD;
2453 else
2454 /* all others */
2455 led_supported = TPACPI_LED_NEW;
2456
2457 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2458 str_supported(led_supported), led_supported);
2459
2460 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2461 }
2462
2463 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2464
2465 static int led_read(char *p)
2466 {
2467 int len = 0;
2468
2469 if (!led_supported) {
2470 len += sprintf(p + len, "status:\t\tnot supported\n");
2471 return len;
2472 }
2473 len += sprintf(p + len, "status:\t\tsupported\n");
2474
2475 if (led_supported == TPACPI_LED_570) {
2476 /* 570 */
2477 int i, status;
2478 for (i = 0; i < 8; i++) {
2479 if (!acpi_evalf(ec_handle,
2480 &status, "GLED", "dd", 1 << i))
2481 return -EIO;
2482 len += sprintf(p + len, "%d:\t\t%s\n",
2483 i, led_status(status));
2484 }
2485 }
2486
2487 len += sprintf(p + len, "commands:\t"
2488 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2489
2490 return len;
2491 }
2492
2493 /* off, on, blink */
2494 static const int led_sled_arg1[] = { 0, 1, 3 };
2495 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
2496 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
2497 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2498
2499 static int led_write(char *buf)
2500 {
2501 char *cmd;
2502 int led, ind, ret;
2503
2504 if (!led_supported)
2505 return -ENODEV;
2506
2507 while ((cmd = next_cmd(&buf))) {
2508 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2509 return -EINVAL;
2510
2511 if (strstr(cmd, "off")) {
2512 ind = 0;
2513 } else if (strstr(cmd, "on")) {
2514 ind = 1;
2515 } else if (strstr(cmd, "blink")) {
2516 ind = 2;
2517 } else
2518 return -EINVAL;
2519
2520 if (led_supported == TPACPI_LED_570) {
2521 /* 570 */
2522 led = 1 << led;
2523 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2524 led, led_sled_arg1[ind]))
2525 return -EIO;
2526 } else if (led_supported == TPACPI_LED_OLD) {
2527 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2528 led = 1 << led;
2529 ret = ec_write(TPACPI_LED_EC_HLMS, led);
2530 if (ret >= 0)
2531 ret =
2532 ec_write(TPACPI_LED_EC_HLBL,
2533 led * led_exp_hlbl[ind]);
2534 if (ret >= 0)
2535 ret =
2536 ec_write(TPACPI_LED_EC_HLCL,
2537 led * led_exp_hlcl[ind]);
2538 if (ret < 0)
2539 return ret;
2540 } else {
2541 /* all others */
2542 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2543 led, led_led_arg1[ind]))
2544 return -EIO;
2545 }
2546 }
2547
2548 return 0;
2549 }
2550
2551 static struct ibm_struct led_driver_data = {
2552 .name = "led",
2553 .read = led_read,
2554 .write = led_write,
2555 };
2556
2557 /*************************************************************************
2558 * Beep subdriver
2559 */
2560
2561 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
2562
2563 static int __init beep_init(struct ibm_init_struct *iibm)
2564 {
2565 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2566
2567 IBM_ACPIHANDLE_INIT(beep);
2568
2569 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2570 str_supported(beep_handle != NULL));
2571
2572 return (beep_handle)? 0 : 1;
2573 }
2574
2575 static int beep_read(char *p)
2576 {
2577 int len = 0;
2578
2579 if (!beep_handle)
2580 len += sprintf(p + len, "status:\t\tnot supported\n");
2581 else {
2582 len += sprintf(p + len, "status:\t\tsupported\n");
2583 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2584 }
2585
2586 return len;
2587 }
2588
2589 static int beep_write(char *buf)
2590 {
2591 char *cmd;
2592 int beep_cmd;
2593
2594 if (!beep_handle)
2595 return -ENODEV;
2596
2597 while ((cmd = next_cmd(&buf))) {
2598 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2599 beep_cmd >= 0 && beep_cmd <= 17) {
2600 /* beep_cmd set */
2601 } else
2602 return -EINVAL;
2603 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2604 return -EIO;
2605 }
2606
2607 return 0;
2608 }
2609
2610 static struct ibm_struct beep_driver_data = {
2611 .name = "beep",
2612 .read = beep_read,
2613 .write = beep_write,
2614 };
2615
2616 /*************************************************************************
2617 * Thermal subdriver
2618 */
2619
2620 static enum thermal_access_mode thermal_read_mode;
2621
2622 /* sysfs temp##_input -------------------------------------------------- */
2623
2624 static ssize_t thermal_temp_input_show(struct device *dev,
2625 struct device_attribute *attr,
2626 char *buf)
2627 {
2628 struct sensor_device_attribute *sensor_attr =
2629 to_sensor_dev_attr(attr);
2630 int idx = sensor_attr->index;
2631 s32 value;
2632 int res;
2633
2634 res = thermal_get_sensor(idx, &value);
2635 if (res)
2636 return res;
2637 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2638 return -ENXIO;
2639
2640 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2641 }
2642
2643 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2644 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2645
2646 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2647 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2648 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2649 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2650 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2651 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2652 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2653 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2654 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2655 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2656 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2657 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2658 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2659 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2660 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2661 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2662 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2663 };
2664
2665 #define THERMAL_ATTRS(X) \
2666 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2667
2668 static struct attribute *thermal_temp_input_attr[] = {
2669 THERMAL_ATTRS(8),
2670 THERMAL_ATTRS(9),
2671 THERMAL_ATTRS(10),
2672 THERMAL_ATTRS(11),
2673 THERMAL_ATTRS(12),
2674 THERMAL_ATTRS(13),
2675 THERMAL_ATTRS(14),
2676 THERMAL_ATTRS(15),
2677 THERMAL_ATTRS(0),
2678 THERMAL_ATTRS(1),
2679 THERMAL_ATTRS(2),
2680 THERMAL_ATTRS(3),
2681 THERMAL_ATTRS(4),
2682 THERMAL_ATTRS(5),
2683 THERMAL_ATTRS(6),
2684 THERMAL_ATTRS(7),
2685 NULL
2686 };
2687
2688 static const struct attribute_group thermal_temp_input16_group = {
2689 .attrs = thermal_temp_input_attr
2690 };
2691
2692 static const struct attribute_group thermal_temp_input8_group = {
2693 .attrs = &thermal_temp_input_attr[8]
2694 };
2695
2696 #undef THERMAL_SENSOR_ATTR_TEMP
2697 #undef THERMAL_ATTRS
2698
2699 /* --------------------------------------------------------------------- */
2700
2701 static int __init thermal_init(struct ibm_init_struct *iibm)
2702 {
2703 u8 t, ta1, ta2;
2704 int i;
2705 int acpi_tmp7;
2706 int res;
2707
2708 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2709
2710 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2711
2712 if (thinkpad_id.ec_model) {
2713 /*
2714 * Direct EC access mode: sensors at registers
2715 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2716 * non-implemented, thermal sensors return 0x80 when
2717 * not available
2718 */
2719
2720 ta1 = ta2 = 0;
2721 for (i = 0; i < 8; i++) {
2722 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2723 ta1 |= t;
2724 } else {
2725 ta1 = 0;
2726 break;
2727 }
2728 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2729 ta2 |= t;
2730 } else {
2731 ta1 = 0;
2732 break;
2733 }
2734 }
2735 if (ta1 == 0) {
2736 /* This is sheer paranoia, but we handle it anyway */
2737 if (acpi_tmp7) {
2738 printk(IBM_ERR
2739 "ThinkPad ACPI EC access misbehaving, "
2740 "falling back to ACPI TMPx access mode\n");
2741 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2742 } else {
2743 printk(IBM_ERR
2744 "ThinkPad ACPI EC access misbehaving, "
2745 "disabling thermal sensors access\n");
2746 thermal_read_mode = TPACPI_THERMAL_NONE;
2747 }
2748 } else {
2749 thermal_read_mode =
2750 (ta2 != 0) ?
2751 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2752 }
2753 } else if (acpi_tmp7) {
2754 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2755 /* 600e/x, 770e, 770x */
2756 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2757 } else {
2758 /* Standard ACPI TMPx access, max 8 sensors */
2759 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2760 }
2761 } else {
2762 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2763 thermal_read_mode = TPACPI_THERMAL_NONE;
2764 }
2765
2766 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2767 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2768 thermal_read_mode);
2769
2770 switch(thermal_read_mode) {
2771 case TPACPI_THERMAL_TPEC_16:
2772 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2773 &thermal_temp_input16_group);
2774 if (res)
2775 return res;
2776 break;
2777 case TPACPI_THERMAL_TPEC_8:
2778 case TPACPI_THERMAL_ACPI_TMP07:
2779 case TPACPI_THERMAL_ACPI_UPDT:
2780 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2781 &thermal_temp_input8_group);
2782 if (res)
2783 return res;
2784 break;
2785 case TPACPI_THERMAL_NONE:
2786 default:
2787 return 1;
2788 }
2789
2790 return 0;
2791 }
2792
2793 static void thermal_exit(void)
2794 {
2795 switch(thermal_read_mode) {
2796 case TPACPI_THERMAL_TPEC_16:
2797 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2798 &thermal_temp_input16_group);
2799 break;
2800 case TPACPI_THERMAL_TPEC_8:
2801 case TPACPI_THERMAL_ACPI_TMP07:
2802 case TPACPI_THERMAL_ACPI_UPDT:
2803 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2804 &thermal_temp_input16_group);
2805 break;
2806 case TPACPI_THERMAL_NONE:
2807 default:
2808 break;
2809 }
2810 }
2811
2812 /* idx is zero-based */
2813 static int thermal_get_sensor(int idx, s32 *value)
2814 {
2815 int t;
2816 s8 tmp;
2817 char tmpi[5];
2818
2819 t = TP_EC_THERMAL_TMP0;
2820
2821 switch (thermal_read_mode) {
2822 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2823 case TPACPI_THERMAL_TPEC_16:
2824 if (idx >= 8 && idx <= 15) {
2825 t = TP_EC_THERMAL_TMP8;
2826 idx -= 8;
2827 }
2828 /* fallthrough */
2829 #endif
2830 case TPACPI_THERMAL_TPEC_8:
2831 if (idx <= 7) {
2832 if (!acpi_ec_read(t + idx, &tmp))
2833 return -EIO;
2834 *value = tmp * 1000;
2835 return 0;
2836 }
2837 break;
2838
2839 case TPACPI_THERMAL_ACPI_UPDT:
2840 if (idx <= 7) {
2841 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2842 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2843 return -EIO;
2844 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2845 return -EIO;
2846 *value = (t - 2732) * 100;
2847 return 0;
2848 }
2849 break;
2850
2851 case TPACPI_THERMAL_ACPI_TMP07:
2852 if (idx <= 7) {
2853 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2854 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2855 return -EIO;
2856 if (t > 127 || t < -127)
2857 t = TP_EC_THERMAL_TMP_NA;
2858 *value = t * 1000;
2859 return 0;
2860 }
2861 break;
2862
2863 case TPACPI_THERMAL_NONE:
2864 default:
2865 return -ENOSYS;
2866 }
2867
2868 return -EINVAL;
2869 }
2870
2871 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2872 {
2873 int res, i;
2874 int n;
2875
2876 n = 8;
2877 i = 0;
2878
2879 if (!s)
2880 return -EINVAL;
2881
2882 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2883 n = 16;
2884
2885 for(i = 0 ; i < n; i++) {
2886 res = thermal_get_sensor(i, &s->temp[i]);
2887 if (res)
2888 return res;
2889 }
2890
2891 return n;
2892 }
2893
2894 static int thermal_read(char *p)
2895 {
2896 int len = 0;
2897 int n, i;
2898 struct ibm_thermal_sensors_struct t;
2899
2900 n = thermal_get_sensors(&t);
2901 if (unlikely(n < 0))
2902 return n;
2903
2904 len += sprintf(p + len, "temperatures:\t");
2905
2906 if (n > 0) {
2907 for (i = 0; i < (n - 1); i++)
2908 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2909 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2910 } else
2911 len += sprintf(p + len, "not supported\n");
2912
2913 return len;
2914 }
2915
2916 static struct ibm_struct thermal_driver_data = {
2917 .name = "thermal",
2918 .read = thermal_read,
2919 .exit = thermal_exit,
2920 };
2921
2922 /*************************************************************************
2923 * EC Dump subdriver
2924 */
2925
2926 static u8 ecdump_regs[256];
2927
2928 static int ecdump_read(char *p)
2929 {
2930 int len = 0;
2931 int i, j;
2932 u8 v;
2933
2934 len += sprintf(p + len, "EC "
2935 " +00 +01 +02 +03 +04 +05 +06 +07"
2936 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2937 for (i = 0; i < 256; i += 16) {
2938 len += sprintf(p + len, "EC 0x%02x:", i);
2939 for (j = 0; j < 16; j++) {
2940 if (!acpi_ec_read(i + j, &v))
2941 break;
2942 if (v != ecdump_regs[i + j])
2943 len += sprintf(p + len, " *%02x", v);
2944 else
2945 len += sprintf(p + len, " %02x", v);
2946 ecdump_regs[i + j] = v;
2947 }
2948 len += sprintf(p + len, "\n");
2949 if (j != 16)
2950 break;
2951 }
2952
2953 /* These are way too dangerous to advertise openly... */
2954 #if 0
2955 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2956 " (<offset> is 00-ff, <value> is 00-ff)\n");
2957 len += sprintf(p + len, "commands:\t0x<offset> <value> "
2958 " (<offset> is 00-ff, <value> is 0-255)\n");
2959 #endif
2960 return len;
2961 }
2962
2963 static int ecdump_write(char *buf)
2964 {
2965 char *cmd;
2966 int i, v;
2967
2968 while ((cmd = next_cmd(&buf))) {
2969 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2970 /* i and v set */
2971 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2972 /* i and v set */
2973 } else
2974 return -EINVAL;
2975 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2976 if (!acpi_ec_write(i, v))
2977 return -EIO;
2978 } else
2979 return -EINVAL;
2980 }
2981
2982 return 0;
2983 }
2984
2985 static struct ibm_struct ecdump_driver_data = {
2986 .name = "ecdump",
2987 .read = ecdump_read,
2988 .write = ecdump_write,
2989 .flags.experimental = 1,
2990 };
2991
2992 /*************************************************************************
2993 * Backlight/brightness subdriver
2994 */
2995
2996 static struct backlight_device *ibm_backlight_device;
2997
2998 static struct backlight_ops ibm_backlight_data = {
2999 .get_brightness = brightness_get,
3000 .update_status = brightness_update_status,
3001 };
3002
3003 static int __init brightness_init(struct ibm_init_struct *iibm)
3004 {
3005 int b;
3006
3007 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3008
3009 if (!brightness_mode) {
3010 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3011 brightness_mode = 2;
3012 else
3013 brightness_mode = 3;
3014
3015 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3016 brightness_mode);
3017 }
3018
3019 if (brightness_mode > 3)
3020 return -EINVAL;
3021
3022 b = brightness_get(NULL);
3023 if (b < 0)
3024 return 1;
3025
3026 ibm_backlight_device = backlight_device_register(
3027 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3028 &ibm_backlight_data);
3029 if (IS_ERR(ibm_backlight_device)) {
3030 printk(IBM_ERR "Could not register backlight device\n");
3031 return PTR_ERR(ibm_backlight_device);
3032 }
3033 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3034
3035 ibm_backlight_device->props.max_brightness = 7;
3036 ibm_backlight_device->props.brightness = b;
3037 backlight_update_status(ibm_backlight_device);
3038
3039 return 0;
3040 }
3041
3042 static void brightness_exit(void)
3043 {
3044 if (ibm_backlight_device) {
3045 vdbg_printk(TPACPI_DBG_EXIT,
3046 "calling backlight_device_unregister()\n");
3047 backlight_device_unregister(ibm_backlight_device);
3048 ibm_backlight_device = NULL;
3049 }
3050 }
3051
3052 static int brightness_update_status(struct backlight_device *bd)
3053 {
3054 return brightness_set(
3055 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3056 bd->props.power == FB_BLANK_UNBLANK) ?
3057 bd->props.brightness : 0);
3058 }
3059
3060 /*
3061 * ThinkPads can read brightness from two places: EC 0x31, or
3062 * CMOS NVRAM byte 0x5E, bits 0-3.
3063 */
3064 static int brightness_get(struct backlight_device *bd)
3065 {
3066 u8 lec = 0, lcmos = 0, level = 0;
3067
3068 if (brightness_mode & 1) {
3069 if (!acpi_ec_read(brightness_offset, &lec))
3070 return -EIO;
3071 lec &= 7;
3072 level = lec;
3073 };
3074 if (brightness_mode & 2) {
3075 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3076 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3077 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3078 level = lcmos;
3079 }
3080
3081 if (brightness_mode == 3 && lec != lcmos) {
3082 printk(IBM_ERR
3083 "CMOS NVRAM (%u) and EC (%u) do not agree "
3084 "on display brightness level\n",
3085 (unsigned int) lcmos,
3086 (unsigned int) lec);
3087 return -EIO;
3088 }
3089
3090 return level;
3091 }
3092
3093 static int brightness_set(int value)
3094 {
3095 int cmos_cmd, inc, i;
3096 int current_value = brightness_get(NULL);
3097
3098 if (value > 7)
3099 return -EINVAL;
3100
3101 cmos_cmd = value > current_value ?
3102 TP_CMOS_BRIGHTNESS_UP :
3103 TP_CMOS_BRIGHTNESS_DOWN;
3104 inc = value > current_value ? 1 : -1;
3105
3106 for (i = current_value; i != value; i += inc) {
3107 if ((brightness_mode & 2) &&
3108 issue_thinkpad_cmos_command(cmos_cmd))
3109 return -EIO;
3110 if ((brightness_mode & 1) &&
3111 !acpi_ec_write(brightness_offset, i + inc))
3112 return -EIO;
3113 }
3114
3115 return 0;
3116 }
3117
3118 static int brightness_read(char *p)
3119 {
3120 int len = 0;
3121 int level;
3122
3123 if ((level = brightness_get(NULL)) < 0) {
3124 len += sprintf(p + len, "level:\t\tunreadable\n");
3125 } else {
3126 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
3127 len += sprintf(p + len, "commands:\tup, down\n");
3128 len += sprintf(p + len, "commands:\tlevel <level>"
3129 " (<level> is 0-7)\n");
3130 }
3131
3132 return len;
3133 }
3134
3135 static int brightness_write(char *buf)
3136 {
3137 int level;
3138 int new_level;
3139 char *cmd;
3140
3141 while ((cmd = next_cmd(&buf))) {
3142 if ((level = brightness_get(NULL)) < 0)
3143 return level;
3144 level &= 7;
3145
3146 if (strlencmp(cmd, "up") == 0) {
3147 new_level = level == 7 ? 7 : level + 1;
3148 } else if (strlencmp(cmd, "down") == 0) {
3149 new_level = level == 0 ? 0 : level - 1;
3150 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3151 new_level >= 0 && new_level <= 7) {
3152 /* new_level set */
3153 } else
3154 return -EINVAL;
3155
3156 brightness_set(new_level);
3157 }
3158
3159 return 0;
3160 }
3161
3162 static struct ibm_struct brightness_driver_data = {
3163 .name = "brightness",
3164 .read = brightness_read,
3165 .write = brightness_write,
3166 .exit = brightness_exit,
3167 };
3168
3169 /*************************************************************************
3170 * Volume subdriver
3171 */
3172
3173 static int volume_read(char *p)
3174 {
3175 int len = 0;
3176 u8 level;
3177
3178 if (!acpi_ec_read(volume_offset, &level)) {
3179 len += sprintf(p + len, "level:\t\tunreadable\n");
3180 } else {
3181 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3182 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3183 len += sprintf(p + len, "commands:\tup, down, mute\n");
3184 len += sprintf(p + len, "commands:\tlevel <level>"
3185 " (<level> is 0-15)\n");
3186 }
3187
3188 return len;
3189 }
3190
3191 static int volume_write(char *buf)
3192 {
3193 int cmos_cmd, inc, i;
3194 u8 level, mute;
3195 int new_level, new_mute;
3196 char *cmd;
3197
3198 while ((cmd = next_cmd(&buf))) {
3199 if (!acpi_ec_read(volume_offset, &level))
3200 return -EIO;
3201 new_mute = mute = level & 0x40;
3202 new_level = level = level & 0xf;
3203
3204 if (strlencmp(cmd, "up") == 0) {
3205 if (mute)
3206 new_mute = 0;
3207 else
3208 new_level = level == 15 ? 15 : level + 1;
3209 } else if (strlencmp(cmd, "down") == 0) {
3210 if (mute)
3211 new_mute = 0;
3212 else
3213 new_level = level == 0 ? 0 : level - 1;
3214 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3215 new_level >= 0 && new_level <= 15) {
3216 /* new_level set */
3217 } else if (strlencmp(cmd, "mute") == 0) {
3218 new_mute = 0x40;
3219 } else
3220 return -EINVAL;
3221
3222 if (new_level != level) { /* mute doesn't change */
3223 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3224 inc = new_level > level ? 1 : -1;
3225
3226 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3227 !acpi_ec_write(volume_offset, level)))
3228 return -EIO;
3229
3230 for (i = level; i != new_level; i += inc)
3231 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3232 !acpi_ec_write(volume_offset, i + inc))
3233 return -EIO;
3234
3235 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3236 !acpi_ec_write(volume_offset,
3237 new_level + mute)))
3238 return -EIO;
3239 }
3240
3241 if (new_mute != mute) { /* level doesn't change */
3242 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3243
3244 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3245 !acpi_ec_write(volume_offset, level + new_mute))
3246 return -EIO;
3247 }
3248 }
3249
3250 return 0;
3251 }
3252
3253 static struct ibm_struct volume_driver_data = {
3254 .name = "volume",
3255 .read = volume_read,
3256 .write = volume_write,
3257 };
3258
3259 /*************************************************************************
3260 * Fan subdriver
3261 */
3262
3263 /*
3264 * FAN ACCESS MODES
3265 *
3266 * TPACPI_FAN_RD_ACPI_GFAN:
3267 * ACPI GFAN method: returns fan level
3268 *
3269 * see TPACPI_FAN_WR_ACPI_SFAN
3270 * EC 0x2f (HFSP) not available if GFAN exists
3271 *
3272 * TPACPI_FAN_WR_ACPI_SFAN:
3273 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3274 *
3275 * EC 0x2f (HFSP) might be available *for reading*, but do not use
3276 * it for writing.
3277 *
3278 * TPACPI_FAN_WR_TPEC:
3279 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
3280 * Supported on almost all ThinkPads
3281 *
3282 * Fan speed changes of any sort (including those caused by the
3283 * disengaged mode) are usually done slowly by the firmware as the
3284 * maximum ammount of fan duty cycle change per second seems to be
3285 * limited.
3286 *
3287 * Reading is not available if GFAN exists.
3288 * Writing is not available if SFAN exists.
3289 *
3290 * Bits
3291 * 7 automatic mode engaged;
3292 * (default operation mode of the ThinkPad)
3293 * fan level is ignored in this mode.
3294 * 6 full speed mode (takes precedence over bit 7);
3295 * not available on all thinkpads. May disable
3296 * the tachometer while the fan controller ramps up
3297 * the speed (which can take up to a few *minutes*).
3298 * Speeds up fan to 100% duty-cycle, which is far above
3299 * the standard RPM levels. It is not impossible that
3300 * it could cause hardware damage.
3301 * 5-3 unused in some models. Extra bits for fan level
3302 * in others, but still useless as all values above
3303 * 7 map to the same speed as level 7 in these models.
3304 * 2-0 fan level (0..7 usually)
3305 * 0x00 = stop
3306 * 0x07 = max (set when temperatures critical)
3307 * Some ThinkPads may have other levels, see
3308 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3309 *
3310 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3311 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3312 * does so, its initial value is meaningless (0x07).
3313 *
3314 * For firmware bugs, refer to:
3315 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3316 *
3317 * ----
3318 *
3319 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3320 * Main fan tachometer reading (in RPM)
3321 *
3322 * This register is present on all ThinkPads with a new-style EC, and
3323 * it is known not to be present on the A21m/e, and T22, as there is
3324 * something else in offset 0x84 according to the ACPI DSDT. Other
3325 * ThinkPads from this same time period (and earlier) probably lack the
3326 * tachometer as well.
3327 *
3328 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3329 * was never fixed by IBM to report the EC firmware version string
3330 * probably support the tachometer (like the early X models), so
3331 * detecting it is quite hard. We need more data to know for sure.
3332 *
3333 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3334 * might result.
3335 *
3336 * FIRMWARE BUG: may go stale while the EC is switching to full speed
3337 * mode.
3338 *
3339 * For firmware bugs, refer to:
3340 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3341 *
3342 * TPACPI_FAN_WR_ACPI_FANS:
3343 * ThinkPad X31, X40, X41. Not available in the X60.
3344 *
3345 * FANS ACPI handle: takes three arguments: low speed, medium speed,
3346 * high speed. ACPI DSDT seems to map these three speeds to levels
3347 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3348 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3349 *
3350 * The speeds are stored on handles
3351 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3352 *
3353 * There are three default speed sets, acessible as handles:
3354 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3355 *
3356 * ACPI DSDT switches which set is in use depending on various
3357 * factors.
3358 *
3359 * TPACPI_FAN_WR_TPEC is also available and should be used to
3360 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
3361 * but the ACPI tables just mention level 7.
3362 */
3363
3364 static enum fan_status_access_mode fan_status_access_mode;
3365 static enum fan_control_access_mode fan_control_access_mode;
3366 static enum fan_control_commands fan_control_commands;
3367
3368 static u8 fan_control_initial_status;
3369 static u8 fan_control_desired_level;
3370
3371 static void fan_watchdog_fire(struct work_struct *ignored);
3372 static int fan_watchdog_maxinterval;
3373 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3374
3375 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
3376 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
3377 "\\FSPD", /* 600e/x, 770e, 770x */
3378 ); /* all others */
3379 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
3380 "JFNS", /* 770x-JL */
3381 ); /* all others */
3382
3383 /*
3384 * SYSFS fan layout: hwmon compatible (device)
3385 *
3386 * pwm*_enable:
3387 * 0: "disengaged" mode
3388 * 1: manual mode
3389 * 2: native EC "auto" mode (recommended, hardware default)
3390 *
3391 * pwm*: set speed in manual mode, ignored otherwise.
3392 * 0 is level 0; 255 is level 7. Intermediate points done with linear
3393 * interpolation.
3394 *
3395 * fan*_input: tachometer reading, RPM
3396 *
3397 *
3398 * SYSFS fan layout: extensions
3399 *
3400 * fan_watchdog (driver):
3401 * fan watchdog interval in seconds, 0 disables (default), max 120
3402 */
3403
3404 /* sysfs fan pwm1_enable ----------------------------------------------- */
3405 static ssize_t fan_pwm1_enable_show(struct device *dev,
3406 struct device_attribute *attr,
3407 char *buf)
3408 {
3409 int res, mode;
3410 u8 status;
3411
3412 res = fan_get_status_safe(&status);
3413 if (res)
3414 return res;
3415
3416 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3417 if (status != fan_control_initial_status) {
3418 tp_features.fan_ctrl_status_undef = 0;
3419 } else {
3420 /* Return most likely status. In fact, it
3421 * might be the only possible status */
3422 status = TP_EC_FAN_AUTO;
3423 }
3424 }
3425
3426 if (status & TP_EC_FAN_FULLSPEED) {
3427 mode = 0;
3428 } else if (status & TP_EC_FAN_AUTO) {
3429 mode = 2;
3430 } else
3431 mode = 1;
3432
3433 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3434 }
3435
3436 static ssize_t fan_pwm1_enable_store(struct device *dev,
3437 struct device_attribute *attr,
3438 const char *buf, size_t count)
3439 {
3440 unsigned long t;
3441 int res, level;
3442
3443 if (parse_strtoul(buf, 2, &t))
3444 return -EINVAL;
3445
3446 switch (t) {
3447 case 0:
3448 level = TP_EC_FAN_FULLSPEED;
3449 break;
3450 case 1:
3451 level = TPACPI_FAN_LAST_LEVEL;
3452 break;
3453 case 2:
3454 level = TP_EC_FAN_AUTO;
3455 break;
3456 case 3:
3457 /* reserved for software-controlled auto mode */
3458 return -ENOSYS;
3459 default:
3460 return -EINVAL;
3461 }
3462
3463 res = fan_set_level_safe(level);
3464 if (res == -ENXIO)
3465 return -EINVAL;
3466 else if (res < 0)
3467 return res;
3468
3469 fan_watchdog_reset();
3470
3471 return count;
3472 }
3473
3474 static struct device_attribute dev_attr_fan_pwm1_enable =
3475 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3476 fan_pwm1_enable_show, fan_pwm1_enable_store);
3477
3478 /* sysfs fan pwm1 ------------------------------------------------------ */
3479 static ssize_t fan_pwm1_show(struct device *dev,
3480 struct device_attribute *attr,
3481 char *buf)
3482 {
3483 int res;
3484 u8 status;
3485
3486 res = fan_get_status_safe(&status);
3487 if (res)
3488 return res;
3489
3490 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3491 if (status != fan_control_initial_status) {
3492 tp_features.fan_ctrl_status_undef = 0;
3493 } else {
3494 status = TP_EC_FAN_AUTO;
3495 }
3496 }
3497
3498 if ((status &
3499 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3500 status = fan_control_desired_level;
3501
3502 if (status > 7)
3503 status = 7;
3504
3505 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3506 }
3507
3508 static ssize_t fan_pwm1_store(struct device *dev,
3509 struct device_attribute *attr,
3510 const char *buf, size_t count)
3511 {
3512 unsigned long s;
3513 int rc;
3514 u8 status, newlevel;
3515
3516 if (parse_strtoul(buf, 255, &s))
3517 return -EINVAL;
3518
3519 /* scale down from 0-255 to 0-7 */
3520 newlevel = (s >> 5) & 0x07;
3521
3522 rc = mutex_lock_interruptible(&fan_mutex);
3523 if (rc < 0)
3524 return rc;
3525
3526 rc = fan_get_status(&status);
3527 if (!rc && (status &
3528 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3529 rc = fan_set_level(newlevel);
3530 if (rc == -ENXIO)
3531 rc = -EINVAL;
3532 else if (!rc) {
3533 fan_update_desired_level(newlevel);
3534 fan_watchdog_reset();
3535 }
3536 }
3537
3538 mutex_unlock(&fan_mutex);
3539 return (rc)? rc : count;
3540 }
3541
3542 static struct device_attribute dev_attr_fan_pwm1 =
3543 __ATTR(pwm1, S_IWUSR | S_IRUGO,
3544 fan_pwm1_show, fan_pwm1_store);
3545
3546 /* sysfs fan fan1_input ------------------------------------------------ */
3547 static ssize_t fan_fan1_input_show(struct device *dev,
3548 struct device_attribute *attr,
3549 char *buf)
3550 {
3551 int res;
3552 unsigned int speed;
3553
3554 res = fan_get_speed(&speed);
3555 if (res < 0)
3556 return res;
3557
3558 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3559 }
3560
3561 static struct device_attribute dev_attr_fan_fan1_input =
3562 __ATTR(fan1_input, S_IRUGO,
3563 fan_fan1_input_show, NULL);
3564
3565 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3566 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3567 char *buf)
3568 {
3569 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3570 }
3571
3572 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3573 const char *buf, size_t count)
3574 {
3575 unsigned long t;
3576
3577 if (parse_strtoul(buf, 120, &t))
3578 return -EINVAL;
3579
3580 if (!fan_control_allowed)
3581 return -EPERM;
3582
3583 fan_watchdog_maxinterval = t;
3584 fan_watchdog_reset();
3585
3586 return count;
3587 }
3588
3589 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3590 fan_fan_watchdog_show, fan_fan_watchdog_store);
3591
3592 /* --------------------------------------------------------------------- */
3593 static struct attribute *fan_attributes[] = {
3594 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3595 &dev_attr_fan_fan1_input.attr,
3596 NULL
3597 };
3598
3599 static const struct attribute_group fan_attr_group = {
3600 .attrs = fan_attributes,
3601 };
3602
3603 static int __init fan_init(struct ibm_init_struct *iibm)
3604 {
3605 int rc;
3606
3607 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3608
3609 mutex_init(&fan_mutex);
3610 fan_status_access_mode = TPACPI_FAN_NONE;
3611 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3612 fan_control_commands = 0;
3613 fan_watchdog_maxinterval = 0;
3614 tp_features.fan_ctrl_status_undef = 0;
3615 fan_control_desired_level = 7;
3616
3617 IBM_ACPIHANDLE_INIT(fans);
3618 IBM_ACPIHANDLE_INIT(gfan);
3619 IBM_ACPIHANDLE_INIT(sfan);
3620
3621 if (gfan_handle) {
3622 /* 570, 600e/x, 770e, 770x */
3623 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3624 } else {
3625 /* all other ThinkPads: note that even old-style
3626 * ThinkPad ECs supports the fan control register */
3627 if (likely(acpi_ec_read(fan_status_offset,
3628 &fan_control_initial_status))) {
3629 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3630
3631 /* In some ThinkPads, neither the EC nor the ACPI
3632 * DSDT initialize the fan status, and it ends up
3633 * being set to 0x07 when it *could* be either
3634 * 0x07 or 0x80.
3635 *
3636 * Enable for TP-1Y (T43), TP-78 (R51e),
3637 * TP-76 (R52), TP-70 (T43, R52), which are known
3638 * to be buggy. */
3639 if (fan_control_initial_status == 0x07) {
3640 switch (thinkpad_id.ec_model) {
3641 case 0x5931: /* TP-1Y */
3642 case 0x3837: /* TP-78 */
3643 case 0x3637: /* TP-76 */
3644 case 0x3037: /* TP-70 */
3645 printk(IBM_NOTICE
3646 "fan_init: initial fan status is "
3647 "unknown, assuming it is in auto "
3648 "mode\n");
3649 tp_features.fan_ctrl_status_undef = 1;
3650 ;;
3651 }
3652 }
3653 } else {
3654 printk(IBM_ERR
3655 "ThinkPad ACPI EC access misbehaving, "
3656 "fan status and control unavailable\n");
3657 return 1;
3658 }
3659 }
3660
3661 if (sfan_handle) {
3662 /* 570, 770x-JL */
3663 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3664 fan_control_commands |=
3665 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3666 } else {
3667 if (!gfan_handle) {
3668 /* gfan without sfan means no fan control */
3669 /* all other models implement TP EC 0x2f control */
3670
3671 if (fans_handle) {
3672 /* X31, X40, X41 */
3673 fan_control_access_mode =
3674 TPACPI_FAN_WR_ACPI_FANS;
3675 fan_control_commands |=
3676 TPACPI_FAN_CMD_SPEED |
3677 TPACPI_FAN_CMD_LEVEL |
3678 TPACPI_FAN_CMD_ENABLE;
3679 } else {
3680 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3681 fan_control_commands |=
3682 TPACPI_FAN_CMD_LEVEL |
3683 TPACPI_FAN_CMD_ENABLE;
3684 }
3685 }
3686 }
3687
3688 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3689 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3690 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3691 fan_status_access_mode, fan_control_access_mode);
3692
3693 /* fan control master switch */
3694 if (!fan_control_allowed) {
3695 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3696 fan_control_commands = 0;
3697 dbg_printk(TPACPI_DBG_INIT,
3698 "fan control features disabled by parameter\n");
3699 }
3700
3701 /* update fan_control_desired_level */
3702 if (fan_status_access_mode != TPACPI_FAN_NONE)
3703 fan_get_status_safe(NULL);
3704
3705 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3706 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3707 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3708 &fan_attr_group);
3709 if (!(rc < 0))
3710 rc = driver_create_file(&tpacpi_pdriver.driver,
3711 &driver_attr_fan_watchdog);
3712 if (rc < 0)
3713 return rc;
3714 return 0;
3715 } else
3716 return 1;
3717 }
3718
3719 /*
3720 * Call with fan_mutex held
3721 */
3722 static void fan_update_desired_level(u8 status)
3723 {
3724 if ((status &
3725 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3726 if (status > 7)
3727 fan_control_desired_level = 7;
3728 else
3729 fan_control_desired_level = status;
3730 }
3731 }
3732
3733 static int fan_get_status(u8 *status)
3734 {
3735 u8 s;
3736
3737 /* TODO:
3738 * Add TPACPI_FAN_RD_ACPI_FANS ? */
3739
3740 switch (fan_status_access_mode) {
3741 case TPACPI_FAN_RD_ACPI_GFAN:
3742 /* 570, 600e/x, 770e, 770x */
3743
3744 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3745 return -EIO;
3746
3747 if (likely(status))
3748 *status = s & 0x07;
3749
3750 break;
3751
3752 case TPACPI_FAN_RD_TPEC:
3753 /* all except 570, 600e/x, 770e, 770x */
3754 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3755 return -EIO;
3756
3757 if (likely(status))
3758 *status = s;
3759
3760 break;
3761
3762 default:
3763 return -ENXIO;
3764 }
3765
3766 return 0;
3767 }
3768
3769 static int fan_get_status_safe(u8 *status)
3770 {
3771 int rc;
3772 u8 s;
3773
3774 rc = mutex_lock_interruptible(&fan_mutex);
3775 if (rc < 0)
3776 return rc;
3777 rc = fan_get_status(&s);
3778 if (!rc)
3779 fan_update_desired_level(s);
3780 mutex_unlock(&fan_mutex);
3781
3782 if (status)
3783 *status = s;
3784
3785 return rc;
3786 }
3787
3788 static void fan_exit(void)
3789 {
3790 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3791
3792 /* FIXME: can we really do this unconditionally? */
3793 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3794 driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3795
3796 cancel_delayed_work(&fan_watchdog_task);
3797 flush_scheduled_work();
3798 }
3799
3800 static int fan_get_speed(unsigned int *speed)
3801 {
3802 u8 hi, lo;
3803
3804 switch (fan_status_access_mode) {
3805 case TPACPI_FAN_RD_TPEC:
3806 /* all except 570, 600e/x, 770e, 770x */
3807 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3808 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3809 return -EIO;
3810
3811 if (likely(speed))
3812 *speed = (hi << 8) | lo;
3813
3814 break;
3815
3816 default:
3817 return -ENXIO;
3818 }
3819
3820 return 0;
3821 }
3822
3823 static void fan_watchdog_fire(struct work_struct *ignored)
3824 {
3825 int rc;
3826
3827 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3828 rc = fan_set_enable();
3829 if (rc < 0) {
3830 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3831 "will try again later...\n", -rc);
3832 /* reschedule for later */
3833 fan_watchdog_reset();
3834 }
3835 }
3836
3837 static void fan_watchdog_reset(void)
3838 {
3839 static int fan_watchdog_active;
3840
3841 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3842 return;
3843
3844 if (fan_watchdog_active)
3845 cancel_delayed_work(&fan_watchdog_task);
3846
3847 if (fan_watchdog_maxinterval > 0) {
3848 fan_watchdog_active = 1;
3849 if (!schedule_delayed_work(&fan_watchdog_task,
3850 msecs_to_jiffies(fan_watchdog_maxinterval
3851 * 1000))) {
3852 printk(IBM_ERR "failed to schedule the fan watchdog, "
3853 "watchdog will not trigger\n");
3854 }
3855 } else
3856 fan_watchdog_active = 0;
3857 }
3858
3859 static int fan_set_level(int level)
3860 {
3861 if (!fan_control_allowed)
3862 return -EPERM;
3863
3864 switch (fan_control_access_mode) {
3865 case TPACPI_FAN_WR_ACPI_SFAN:
3866 if (level >= 0 && level <= 7) {
3867 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3868 return -EIO;
3869 } else
3870 return -EINVAL;
3871 break;
3872
3873 case TPACPI_FAN_WR_ACPI_FANS:
3874 case TPACPI_FAN_WR_TPEC:
3875 if ((level != TP_EC_FAN_AUTO) &&
3876 (level != TP_EC_FAN_FULLSPEED) &&
3877 ((level < 0) || (level > 7)))
3878 return -EINVAL;
3879
3880 /* safety net should the EC not support AUTO
3881 * or FULLSPEED mode bits and just ignore them */
3882 if (level & TP_EC_FAN_FULLSPEED)
3883 level |= 7; /* safety min speed 7 */
3884 else if (level & TP_EC_FAN_FULLSPEED)
3885 level |= 4; /* safety min speed 4 */
3886
3887 if (!acpi_ec_write(fan_status_offset, level))
3888 return -EIO;
3889 else
3890 tp_features.fan_ctrl_status_undef = 0;
3891 break;
3892
3893 default:
3894 return -ENXIO;
3895 }
3896 return 0;
3897 }
3898
3899 static int fan_set_level_safe(int level)
3900 {
3901 int rc;
3902
3903 if (!fan_control_allowed)
3904 return -EPERM;
3905
3906 rc = mutex_lock_interruptible(&fan_mutex);
3907 if (rc < 0)
3908 return rc;
3909
3910 if (level == TPACPI_FAN_LAST_LEVEL)
3911 level = fan_control_desired_level;
3912
3913 rc = fan_set_level(level);
3914 if (!rc)
3915 fan_update_desired_level(level);
3916
3917 mutex_unlock(&fan_mutex);
3918 return rc;
3919 }
3920
3921 static int fan_set_enable(void)
3922 {
3923 u8 s;
3924 int rc;
3925
3926 if (!fan_control_allowed)
3927 return -EPERM;
3928
3929 rc = mutex_lock_interruptible(&fan_mutex);
3930 if (rc < 0)
3931 return rc;
3932
3933 switch (fan_control_access_mode) {
3934 case TPACPI_FAN_WR_ACPI_FANS:
3935 case TPACPI_FAN_WR_TPEC:
3936 rc = fan_get_status(&s);
3937 if (rc < 0)
3938 break;
3939
3940 /* Don't go out of emergency fan mode */
3941 if (s != 7) {
3942 s &= 0x07;
3943 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3944 }
3945
3946 if (!acpi_ec_write(fan_status_offset, s))
3947 rc = -EIO;
3948 else {
3949 tp_features.fan_ctrl_status_undef = 0;
3950 rc = 0;
3951 }
3952 break;
3953
3954 case TPACPI_FAN_WR_ACPI_SFAN:
3955 rc = fan_get_status(&s);
3956 if (rc < 0)
3957 break;
3958
3959 s &= 0x07;
3960
3961 /* Set fan to at least level 4 */
3962 s |= 4;
3963
3964 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3965 rc= -EIO;
3966 else
3967 rc = 0;
3968 break;
3969
3970 default:
3971 rc = -ENXIO;
3972 }
3973
3974 mutex_unlock(&fan_mutex);
3975 return rc;
3976 }
3977
3978 static int fan_set_disable(void)
3979 {
3980 int rc;
3981
3982 if (!fan_control_allowed)
3983 return -EPERM;
3984
3985 rc = mutex_lock_interruptible(&fan_mutex);
3986 if (rc < 0)
3987 return rc;
3988
3989 rc = 0;
3990 switch (fan_control_access_mode) {
3991 case TPACPI_FAN_WR_ACPI_FANS:
3992 case TPACPI_FAN_WR_TPEC:
3993 if (!acpi_ec_write(fan_status_offset, 0x00))
3994 rc = -EIO;
3995 else {
3996 fan_control_desired_level = 0;
3997 tp_features.fan_ctrl_status_undef = 0;
3998 }
3999 break;
4000
4001 case TPACPI_FAN_WR_ACPI_SFAN:
4002 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4003 rc = -EIO;
4004 else
4005 fan_control_desired_level = 0;
4006 break;
4007
4008 default:
4009 rc = -ENXIO;
4010 }
4011
4012
4013 mutex_unlock(&fan_mutex);
4014 return rc;
4015 }
4016
4017 static int fan_set_speed(int speed)
4018 {
4019 int rc;
4020
4021 if (!fan_control_allowed)
4022 return -EPERM;
4023
4024 rc = mutex_lock_interruptible(&fan_mutex);
4025 if (rc < 0)
4026 return rc;
4027
4028 rc = 0;
4029 switch (fan_control_access_mode) {
4030 case TPACPI_FAN_WR_ACPI_FANS:
4031 if (speed >= 0 && speed <= 65535) {
4032 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4033 speed, speed, speed))
4034 rc = -EIO;
4035 } else
4036 rc = -EINVAL;
4037 break;
4038
4039 default:
4040 rc = -ENXIO;
4041 }
4042
4043 mutex_unlock(&fan_mutex);
4044 return rc;
4045 }
4046
4047 static int fan_read(char *p)
4048 {
4049 int len = 0;
4050 int rc;
4051 u8 status;
4052 unsigned int speed = 0;
4053
4054 switch (fan_status_access_mode) {
4055 case TPACPI_FAN_RD_ACPI_GFAN:
4056 /* 570, 600e/x, 770e, 770x */
4057 if ((rc = fan_get_status_safe(&status)) < 0)
4058 return rc;
4059
4060 len += sprintf(p + len, "status:\t\t%s\n"
4061 "level:\t\t%d\n",
4062 (status != 0) ? "enabled" : "disabled", status);
4063 break;
4064
4065 case TPACPI_FAN_RD_TPEC:
4066 /* all except 570, 600e/x, 770e, 770x */
4067 if ((rc = fan_get_status_safe(&status)) < 0)
4068 return rc;
4069
4070 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4071 if (status != fan_control_initial_status)
4072 tp_features.fan_ctrl_status_undef = 0;
4073 else
4074 /* Return most likely status. In fact, it
4075 * might be the only possible status */
4076 status = TP_EC_FAN_AUTO;
4077 }
4078
4079 len += sprintf(p + len, "status:\t\t%s\n",
4080 (status != 0) ? "enabled" : "disabled");
4081
4082 if ((rc = fan_get_speed(&speed)) < 0)
4083 return rc;
4084
4085 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4086
4087 if (status & TP_EC_FAN_FULLSPEED)
4088 /* Disengaged mode takes precedence */
4089 len += sprintf(p + len, "level:\t\tdisengaged\n");
4090 else if (status & TP_EC_FAN_AUTO)
4091 len += sprintf(p + len, "level:\t\tauto\n");
4092 else
4093 len += sprintf(p + len, "level:\t\t%d\n", status);
4094 break;
4095
4096 case TPACPI_FAN_NONE:
4097 default:
4098 len += sprintf(p + len, "status:\t\tnot supported\n");
4099 }
4100
4101 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4102 len += sprintf(p + len, "commands:\tlevel <level>");
4103
4104 switch (fan_control_access_mode) {
4105 case TPACPI_FAN_WR_ACPI_SFAN:
4106 len += sprintf(p + len, " (<level> is 0-7)\n");
4107 break;
4108
4109 default:
4110 len += sprintf(p + len, " (<level> is 0-7, "
4111 "auto, disengaged, full-speed)\n");
4112 break;
4113 }
4114 }
4115
4116 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4117 len += sprintf(p + len, "commands:\tenable, disable\n"
4118 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4119 "1-120 (seconds))\n");
4120
4121 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4122 len += sprintf(p + len, "commands:\tspeed <speed>"
4123 " (<speed> is 0-65535)\n");
4124
4125 return len;
4126 }
4127
4128 static int fan_write_cmd_level(const char *cmd, int *rc)
4129 {
4130 int level;
4131
4132 if (strlencmp(cmd, "level auto") == 0)
4133 level = TP_EC_FAN_AUTO;
4134 else if ((strlencmp(cmd, "level disengaged") == 0) |
4135 (strlencmp(cmd, "level full-speed") == 0))
4136 level = TP_EC_FAN_FULLSPEED;
4137 else if (sscanf(cmd, "level %d", &level) != 1)
4138 return 0;
4139
4140 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4141 printk(IBM_ERR "level command accepted for unsupported "
4142 "access mode %d", fan_control_access_mode);
4143
4144 return 1;
4145 }
4146
4147 static int fan_write_cmd_enable(const char *cmd, int *rc)
4148 {
4149 if (strlencmp(cmd, "enable") != 0)
4150 return 0;
4151
4152 if ((*rc = fan_set_enable()) == -ENXIO)
4153 printk(IBM_ERR "enable command accepted for unsupported "
4154 "access mode %d", fan_control_access_mode);
4155
4156 return 1;
4157 }
4158
4159 static int fan_write_cmd_disable(const char *cmd, int *rc)
4160 {
4161 if (strlencmp(cmd, "disable") != 0)
4162 return 0;
4163
4164 if ((*rc = fan_set_disable()) == -ENXIO)
4165 printk(IBM_ERR "disable command accepted for unsupported "
4166 "access mode %d", fan_control_access_mode);
4167
4168 return 1;
4169 }
4170
4171 static int fan_write_cmd_speed(const char *cmd, int *rc)
4172 {
4173 int speed;
4174
4175 /* TODO:
4176 * Support speed <low> <medium> <high> ? */
4177
4178 if (sscanf(cmd, "speed %d", &speed) != 1)
4179 return 0;
4180
4181 if ((*rc = fan_set_speed(speed)) == -ENXIO)
4182 printk(IBM_ERR "speed command accepted for unsupported "
4183 "access mode %d", fan_control_access_mode);
4184
4185 return 1;
4186 }
4187
4188 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4189 {
4190 int interval;
4191
4192 if (sscanf(cmd, "watchdog %d", &interval) != 1)
4193 return 0;
4194
4195 if (interval < 0 || interval > 120)
4196 *rc = -EINVAL;
4197 else
4198 fan_watchdog_maxinterval = interval;
4199
4200 return 1;
4201 }
4202
4203 static int fan_write(char *buf)
4204 {
4205 char *cmd;
4206 int rc = 0;
4207
4208 while (!rc && (cmd = next_cmd(&buf))) {
4209 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4210 fan_write_cmd_level(cmd, &rc)) &&
4211 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4212 (fan_write_cmd_enable(cmd, &rc) ||
4213 fan_write_cmd_disable(cmd, &rc) ||
4214 fan_write_cmd_watchdog(cmd, &rc))) &&
4215 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4216 fan_write_cmd_speed(cmd, &rc))
4217 )
4218 rc = -EINVAL;
4219 else if (!rc)
4220 fan_watchdog_reset();
4221 }
4222
4223 return rc;
4224 }
4225
4226 static struct ibm_struct fan_driver_data = {
4227 .name = "fan",
4228 .read = fan_read,
4229 .write = fan_write,
4230 .exit = fan_exit,
4231 };
4232
4233 /****************************************************************************
4234 ****************************************************************************
4235 *
4236 * Infrastructure
4237 *
4238 ****************************************************************************
4239 ****************************************************************************/
4240
4241 /* /proc support */
4242 static struct proc_dir_entry *proc_dir;
4243
4244 /* Subdriver registry */
4245 static LIST_HEAD(tpacpi_all_drivers);
4246
4247
4248 /*
4249 * Module and infrastructure proble, init and exit handling
4250 */
4251
4252 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4253 static const char * __init str_supported(int is_supported)
4254 {
4255 static char text_unsupported[] __initdata = "not supported";
4256
4257 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4258 }
4259 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4260
4261 static int __init ibm_init(struct ibm_init_struct *iibm)
4262 {
4263 int ret;
4264 struct ibm_struct *ibm = iibm->data;
4265 struct proc_dir_entry *entry;
4266
4267 BUG_ON(ibm == NULL);
4268
4269 INIT_LIST_HEAD(&ibm->all_drivers);
4270
4271 if (ibm->flags.experimental && !experimental)
4272 return 0;
4273
4274 dbg_printk(TPACPI_DBG_INIT,
4275 "probing for %s\n", ibm->name);
4276
4277 if (iibm->init) {
4278 ret = iibm->init(iibm);
4279 if (ret > 0)
4280 return 0; /* probe failed */
4281 if (ret)
4282 return ret;
4283
4284 ibm->flags.init_called = 1;
4285 }
4286
4287 if (ibm->acpi) {
4288 if (ibm->acpi->hid) {
4289 ret = register_tpacpi_subdriver(ibm);
4290 if (ret)
4291 goto err_out;
4292 }
4293
4294 if (ibm->acpi->notify) {
4295 ret = setup_acpi_notify(ibm);
4296 if (ret == -ENODEV) {
4297 printk(IBM_NOTICE "disabling subdriver %s\n",
4298 ibm->name);
4299 ret = 0;
4300 goto err_out;
4301 }
4302 if (ret < 0)
4303 goto err_out;
4304 }
4305 }
4306
4307 dbg_printk(TPACPI_DBG_INIT,
4308 "%s installed\n", ibm->name);
4309
4310 if (ibm->read) {
4311 entry = create_proc_entry(ibm->name,
4312 S_IFREG | S_IRUGO | S_IWUSR,
4313 proc_dir);
4314 if (!entry) {
4315 printk(IBM_ERR "unable to create proc entry %s\n",
4316 ibm->name);
4317 ret = -ENODEV;
4318 goto err_out;
4319 }
4320 entry->owner = THIS_MODULE;
4321 entry->data = ibm;
4322 entry->read_proc = &dispatch_procfs_read;
4323 if (ibm->write)
4324 entry->write_proc = &dispatch_procfs_write;
4325 ibm->flags.proc_created = 1;
4326 }
4327
4328 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4329
4330 return 0;
4331
4332 err_out:
4333 dbg_printk(TPACPI_DBG_INIT,
4334 "%s: at error exit path with result %d\n",
4335 ibm->name, ret);
4336
4337 ibm_exit(ibm);
4338 return (ret < 0)? ret : 0;
4339 }
4340
4341 static void ibm_exit(struct ibm_struct *ibm)
4342 {
4343 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4344
4345 list_del_init(&ibm->all_drivers);
4346
4347 if (ibm->flags.acpi_notify_installed) {
4348 dbg_printk(TPACPI_DBG_EXIT,
4349 "%s: acpi_remove_notify_handler\n", ibm->name);
4350 BUG_ON(!ibm->acpi);
4351 acpi_remove_notify_handler(*ibm->acpi->handle,
4352 ibm->acpi->type,
4353 dispatch_acpi_notify);
4354 ibm->flags.acpi_notify_installed = 0;
4355 ibm->flags.acpi_notify_installed = 0;
4356 }
4357
4358 if (ibm->flags.proc_created) {
4359 dbg_printk(TPACPI_DBG_EXIT,
4360 "%s: remove_proc_entry\n", ibm->name);
4361 remove_proc_entry(ibm->name, proc_dir);
4362 ibm->flags.proc_created = 0;
4363 }
4364
4365 if (ibm->flags.acpi_driver_registered) {
4366 dbg_printk(TPACPI_DBG_EXIT,
4367 "%s: acpi_bus_unregister_driver\n", ibm->name);
4368 BUG_ON(!ibm->acpi);
4369 acpi_bus_unregister_driver(ibm->acpi->driver);
4370 kfree(ibm->acpi->driver);
4371 ibm->acpi->driver = NULL;
4372 ibm->flags.acpi_driver_registered = 0;
4373 }
4374
4375 if (ibm->flags.init_called && ibm->exit) {
4376 ibm->exit();
4377 ibm->flags.init_called = 0;
4378 }
4379
4380 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4381 }
4382
4383 /* Probing */
4384
4385 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4386 {
4387 struct dmi_device *dev = NULL;
4388 char ec_fw_string[18];
4389
4390 if (!tp)
4391 return;
4392
4393 memset(tp, 0, sizeof(*tp));
4394
4395 if (dmi_name_in_vendors("IBM"))
4396 tp->vendor = PCI_VENDOR_ID_IBM;
4397 else if (dmi_name_in_vendors("LENOVO"))
4398 tp->vendor = PCI_VENDOR_ID_LENOVO;
4399 else
4400 return;
4401
4402 tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4403 GFP_KERNEL);
4404 if (!tp->bios_version_str)
4405 return;
4406 tp->bios_model = tp->bios_version_str[0]
4407 | (tp->bios_version_str[1] << 8);
4408
4409 /*
4410 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4411 * X32 or newer, all Z series; Some models must have an
4412 * up-to-date BIOS or they will not be detected.
4413 *
4414 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4415 */
4416 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4417 if (sscanf(dev->name,
4418 "IBM ThinkPad Embedded Controller -[%17c",
4419 ec_fw_string) == 1) {
4420 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4421 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4422
4423 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4424 tp->ec_model = ec_fw_string[0]
4425 | (ec_fw_string[1] << 8);
4426 break;
4427 }
4428 }
4429
4430 tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4431 GFP_KERNEL);
4432 if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4433 kfree(tp->model_str);
4434 tp->model_str = NULL;
4435 }
4436 }
4437
4438 static int __init probe_for_thinkpad(void)
4439 {
4440 int is_thinkpad;
4441
4442 if (acpi_disabled)
4443 return -ENODEV;
4444
4445 /*
4446 * Non-ancient models have better DMI tagging, but very old models
4447 * don't.
4448 */
4449 is_thinkpad = (thinkpad_id.model_str != NULL);
4450
4451 /* ec is required because many other handles are relative to it */
4452 IBM_ACPIHANDLE_INIT(ec);
4453 if (!ec_handle) {
4454 if (is_thinkpad)
4455 printk(IBM_ERR
4456 "Not yet supported ThinkPad detected!\n");
4457 return -ENODEV;
4458 }
4459
4460 /*
4461 * Risks a regression on very old machines, but reduces potential
4462 * false positives a damn great deal
4463 */
4464 if (!is_thinkpad)
4465 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4466
4467 if (!is_thinkpad && !force_load)
4468 return -ENODEV;
4469
4470 return 0;
4471 }
4472
4473
4474 /* Module init, exit, parameters */
4475
4476 static struct ibm_init_struct ibms_init[] __initdata = {
4477 {
4478 .init = thinkpad_acpi_driver_init,
4479 .data = &thinkpad_acpi_driver_data,
4480 },
4481 {
4482 .init = hotkey_init,
4483 .data = &hotkey_driver_data,
4484 },
4485 {
4486 .init = bluetooth_init,
4487 .data = &bluetooth_driver_data,
4488 },
4489 {
4490 .init = wan_init,
4491 .data = &wan_driver_data,
4492 },
4493 {
4494 .init = video_init,
4495 .data = &video_driver_data,
4496 },
4497 {
4498 .init = light_init,
4499 .data = &light_driver_data,
4500 },
4501 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4502 {
4503 .init = dock_init,
4504 .data = &dock_driver_data[0],
4505 },
4506 {
4507 .init = dock_init2,
4508 .data = &dock_driver_data[1],
4509 },
4510 #endif
4511 #ifdef CONFIG_THINKPAD_ACPI_BAY
4512 {
4513 .init = bay_init,
4514 .data = &bay_driver_data,
4515 },
4516 #endif
4517 {
4518 .init = cmos_init,
4519 .data = &cmos_driver_data,
4520 },
4521 {
4522 .init = led_init,
4523 .data = &led_driver_data,
4524 },
4525 {
4526 .init = beep_init,
4527 .data = &beep_driver_data,
4528 },
4529 {
4530 .init = thermal_init,
4531 .data = &thermal_driver_data,
4532 },
4533 {
4534 .data = &ecdump_driver_data,
4535 },
4536 {
4537 .init = brightness_init,
4538 .data = &brightness_driver_data,
4539 },
4540 {
4541 .data = &volume_driver_data,
4542 },
4543 {
4544 .init = fan_init,
4545 .data = &fan_driver_data,
4546 },
4547 };
4548
4549 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4550 {
4551 unsigned int i;
4552 struct ibm_struct *ibm;
4553
4554 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4555 ibm = ibms_init[i].data;
4556 BUG_ON(ibm == NULL);
4557
4558 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4559 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4560 return -ENOSPC;
4561 strcpy(ibms_init[i].param, val);
4562 strcat(ibms_init[i].param, ",");
4563 return 0;
4564 }
4565 }
4566
4567 return -EINVAL;
4568 }
4569
4570 static int experimental;
4571 module_param(experimental, int, 0);
4572
4573 static u32 dbg_level;
4574 module_param_named(debug, dbg_level, uint, 0);
4575
4576 static int force_load;
4577 module_param(force_load, bool, 0);
4578
4579 static int fan_control_allowed;
4580 module_param_named(fan_control, fan_control_allowed, bool, 0);
4581
4582 static int brightness_mode;
4583 module_param_named(brightness_mode, brightness_mode, int, 0);
4584
4585 #define IBM_PARAM(feature) \
4586 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4587
4588 IBM_PARAM(hotkey);
4589 IBM_PARAM(bluetooth);
4590 IBM_PARAM(video);
4591 IBM_PARAM(light);
4592 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4593 IBM_PARAM(dock);
4594 #endif
4595 #ifdef CONFIG_THINKPAD_ACPI_BAY
4596 IBM_PARAM(bay);
4597 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4598 IBM_PARAM(cmos);
4599 IBM_PARAM(led);
4600 IBM_PARAM(beep);
4601 IBM_PARAM(ecdump);
4602 IBM_PARAM(brightness);
4603 IBM_PARAM(volume);
4604 IBM_PARAM(fan);
4605
4606 static int __init thinkpad_acpi_module_init(void)
4607 {
4608 int ret, i;
4609
4610 /* Driver-level probe */
4611
4612 get_thinkpad_model_data(&thinkpad_id);
4613 ret = probe_for_thinkpad();
4614 if (ret) {
4615 thinkpad_acpi_module_exit();
4616 return ret;
4617 }
4618
4619 /* Driver initialization */
4620
4621 IBM_ACPIHANDLE_INIT(ecrd);
4622 IBM_ACPIHANDLE_INIT(ecwr);
4623
4624 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4625 if (!proc_dir) {
4626 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4627 thinkpad_acpi_module_exit();
4628 return -ENODEV;
4629 }
4630 proc_dir->owner = THIS_MODULE;
4631
4632 ret = platform_driver_register(&tpacpi_pdriver);
4633 if (ret) {
4634 printk(IBM_ERR "unable to register platform driver\n");
4635 thinkpad_acpi_module_exit();
4636 return ret;
4637 }
4638 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4639 if (ret) {
4640 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4641 thinkpad_acpi_module_exit();
4642 return ret;
4643 }
4644
4645
4646 /* Device initialization */
4647 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4648 NULL, 0);
4649 if (IS_ERR(tpacpi_pdev)) {
4650 ret = PTR_ERR(tpacpi_pdev);
4651 tpacpi_pdev = NULL;
4652 printk(IBM_ERR "unable to register platform device\n");
4653 thinkpad_acpi_module_exit();
4654 return ret;
4655 }
4656 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4657 if (IS_ERR(tpacpi_hwmon)) {
4658 ret = PTR_ERR(tpacpi_hwmon);
4659 tpacpi_hwmon = NULL;
4660 printk(IBM_ERR "unable to register hwmon device\n");
4661 thinkpad_acpi_module_exit();
4662 return ret;
4663 }
4664 tpacpi_inputdev = input_allocate_device();
4665 if (!tpacpi_inputdev) {
4666 printk(IBM_ERR "unable to allocate input device\n");
4667 thinkpad_acpi_module_exit();
4668 return -ENOMEM;
4669 } else {
4670 /* Prepare input device, but don't register */
4671 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4672 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4673 tpacpi_inputdev->id.bustype = BUS_HOST;
4674 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
4675 thinkpad_id.vendor :
4676 PCI_VENDOR_ID_IBM;
4677 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4678 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4679 }
4680 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4681 ret = ibm_init(&ibms_init[i]);
4682 if (ret >= 0 && *ibms_init[i].param)
4683 ret = ibms_init[i].data->write(ibms_init[i].param);
4684 if (ret < 0) {
4685 thinkpad_acpi_module_exit();
4686 return ret;
4687 }
4688 }
4689 ret = input_register_device(tpacpi_inputdev);
4690 if (ret < 0) {
4691 printk(IBM_ERR "unable to register input device\n");
4692 thinkpad_acpi_module_exit();
4693 return ret;
4694 } else {
4695 tp_features.input_device_registered = 1;
4696 }
4697
4698 return 0;
4699 }
4700
4701 static void thinkpad_acpi_module_exit(void)
4702 {
4703 struct ibm_struct *ibm, *itmp;
4704
4705 list_for_each_entry_safe_reverse(ibm, itmp,
4706 &tpacpi_all_drivers,
4707 all_drivers) {
4708 ibm_exit(ibm);
4709 }
4710
4711 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4712
4713 if (tpacpi_inputdev) {
4714 if (tp_features.input_device_registered)
4715 input_unregister_device(tpacpi_inputdev);
4716 else
4717 input_free_device(tpacpi_inputdev);
4718 }
4719
4720 if (tpacpi_hwmon)
4721 hwmon_device_unregister(tpacpi_hwmon);
4722
4723 if (tpacpi_pdev)
4724 platform_device_unregister(tpacpi_pdev);
4725
4726 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4727 platform_driver_unregister(&tpacpi_pdriver);
4728
4729 if (proc_dir)
4730 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4731
4732 kfree(thinkpad_id.bios_version_str);
4733 kfree(thinkpad_id.ec_version_str);
4734 kfree(thinkpad_id.model_str);
4735 }
4736
4737 module_init(thinkpad_acpi_module_init);
4738 module_exit(thinkpad_acpi_module_exit);
WandBoard kernel