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1/*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24#define IBM_VERSION "0.14"
25#define TPACPI_SYSFS_VERSION 0x000100
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
87MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
88MODULE_DESCRIPTION(IBM_DESC);
89MODULE_VERSION(IBM_VERSION);
90MODULE_LICENSE("GPL");
91
92/* Please remove this in year 2009 */
93MODULE_ALIAS("ibm_acpi");
94
95#define __unused __attribute__ ((unused))
96
97/****************************************************************************
98 ****************************************************************************
99 *
100 * ACPI Helpers and device model
101 *
102 ****************************************************************************
103 ****************************************************************************/
104
105/*************************************************************************
106 * ACPI basic handles
107 */
108
109static acpi_handle root_handle = NULL;
110
111#define IBM_HANDLE(object, parent, paths...) \
112 static acpi_handle object##_handle; \
113 static acpi_handle *object##_parent = &parent##_handle; \
114 static char *object##_path; \
115 static char *object##_paths[] = { paths }
116
117IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
118 "\\_SB.PCI.ISA.EC", /* 570 */
119 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
120 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
121 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
122 "\\_SB.PCI0.ICH3.EC0", /* R31 */
123 "\\_SB.PCI0.LPC.EC", /* all others */
124 );
125
126IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
127IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
128
129
130/*************************************************************************
131 * Misc ACPI handles
132 */
133
134IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
135 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
136 "\\CMS", /* R40, R40e */
137 ); /* all others */
138
139IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
140 "^HKEY", /* R30, R31 */
141 "HKEY", /* all others */
142 ); /* 570 */
143
144
145/*************************************************************************
146 * ACPI helpers
147 */
148
149static int acpi_evalf(acpi_handle handle,
150 void *res, char *method, char *fmt, ...)
151{
152 char *fmt0 = fmt;
153 struct acpi_object_list params;
154 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
155 struct acpi_buffer result, *resultp;
156 union acpi_object out_obj;
157 acpi_status status;
158 va_list ap;
159 char res_type;
160 int success;
161 int quiet;
162
163 if (!*fmt) {
164 printk(IBM_ERR "acpi_evalf() called with empty format\n");
165 return 0;
166 }
167
168 if (*fmt == 'q') {
169 quiet = 1;
170 fmt++;
171 } else
172 quiet = 0;
173
174 res_type = *(fmt++);
175
176 params.count = 0;
177 params.pointer = &in_objs[0];
178
179 va_start(ap, fmt);
180 while (*fmt) {
181 char c = *(fmt++);
182 switch (c) {
183 case 'd': /* int */
184 in_objs[params.count].integer.value = va_arg(ap, int);
185 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
186 break;
187 /* add more types as needed */
188 default:
189 printk(IBM_ERR "acpi_evalf() called "
190 "with invalid format character '%c'\n", c);
191 return 0;
192 }
193 }
194 va_end(ap);
195
196 if (res_type != 'v') {
197 result.length = sizeof(out_obj);
198 result.pointer = &out_obj;
199 resultp = &result;
200 } else
201 resultp = NULL;
202
203 status = acpi_evaluate_object(handle, method, &params, resultp);
204
205 switch (res_type) {
206 case 'd': /* int */
207 if (res)
208 *(int *)res = out_obj.integer.value;
209 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
210 break;
211 case 'v': /* void */
212 success = status == AE_OK;
213 break;
214 /* add more types as needed */
215 default:
216 printk(IBM_ERR "acpi_evalf() called "
217 "with invalid format character '%c'\n", res_type);
218 return 0;
219 }
220
221 if (!success && !quiet)
222 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
223 method, fmt0, status);
224
225 return success;
226}
227
228static void __unused acpi_print_int(acpi_handle handle, char *method)
229{
230 int i;
231
232 if (acpi_evalf(handle, &i, method, "d"))
233 printk(IBM_INFO "%s = 0x%x\n", method, i);
234 else
235 printk(IBM_ERR "error calling %s\n", method);
236}
237
238static int acpi_ec_read(int i, u8 * p)
239{
240 int v;
241
242 if (ecrd_handle) {
243 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
244 return 0;
245 *p = v;
246 } else {
247 if (ec_read(i, p) < 0)
248 return 0;
249 }
250
251 return 1;
252}
253
254static int acpi_ec_write(int i, u8 v)
255{
256 if (ecwr_handle) {
257 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
258 return 0;
259 } else {
260 if (ec_write(i, v) < 0)
261 return 0;
262 }
263
264 return 1;
265}
266
267static int _sta(acpi_handle handle)
268{
269 int status;
270
271 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
272 status = 0;
273
274 return status;
275}
276
277static int issue_thinkpad_cmos_command(int cmos_cmd)
278{
279 if (!cmos_handle)
280 return -ENXIO;
281
282 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
283 return -EIO;
284
285 return 0;
286}
287
288/*************************************************************************
289 * ACPI device model
290 */
291
292static void drv_acpi_handle_init(char *name,
293 acpi_handle *handle, acpi_handle parent,
294 char **paths, int num_paths, char **path)
295{
296 int i;
297 acpi_status status;
298
299 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
300 name);
301
302 for (i = 0; i < num_paths; i++) {
303 status = acpi_get_handle(parent, paths[i], handle);
304 if (ACPI_SUCCESS(status)) {
305 *path = paths[i];
306 dbg_printk(TPACPI_DBG_INIT,
307 "Found ACPI handle %s for %s\n",
308 *path, name);
309 return;
310 }
311 }
312
313 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
314 name);
315 *handle = NULL;
316}
317
318static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
319{
320 struct ibm_struct *ibm = data;
321
322 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
323 return;
324
325 ibm->acpi->notify(ibm, event);
326}
327
328static int __init setup_acpi_notify(struct ibm_struct *ibm)
329{
330 acpi_status status;
331 int rc;
332
333 BUG_ON(!ibm->acpi);
334
335 if (!*ibm->acpi->handle)
336 return 0;
337
338 vdbg_printk(TPACPI_DBG_INIT,
339 "setting up ACPI notify for %s\n", ibm->name);
340
341 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
342 if (rc < 0) {
343 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
344 ibm->name, rc);
345 return -ENODEV;
346 }
347
348 acpi_driver_data(ibm->acpi->device) = ibm;
349 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
350 IBM_ACPI_EVENT_PREFIX,
351 ibm->name);
352
353 status = acpi_install_notify_handler(*ibm->acpi->handle,
354 ibm->acpi->type, dispatch_acpi_notify, ibm);
355 if (ACPI_FAILURE(status)) {
356 if (status == AE_ALREADY_EXISTS) {
357 printk(IBM_NOTICE "another device driver is already handling %s events\n",
358 ibm->name);
359 } else {
360 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
361 ibm->name, status);
362 }
363 return -ENODEV;
364 }
365 ibm->flags.acpi_notify_installed = 1;
366 return 0;
367}
368
369static int __init tpacpi_device_add(struct acpi_device *device)
370{
371 return 0;
372}
373
374static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
375{
376 int rc;
377
378 dbg_printk(TPACPI_DBG_INIT,
379 "registering %s as an ACPI driver\n", ibm->name);
380
381 BUG_ON(!ibm->acpi);
382
383 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
384 if (!ibm->acpi->driver) {
385 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
386 return -ENOMEM;
387 }
388
389 sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
390 ibm->acpi->driver->ids = ibm->acpi->hid;
391 ibm->acpi->driver->ops.add = &tpacpi_device_add;
392
393 rc = acpi_bus_register_driver(ibm->acpi->driver);
394 if (rc < 0) {
395 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
396 ibm->acpi->hid, rc);
397 kfree(ibm->acpi->driver);
398 ibm->acpi->driver = NULL;
399 } else if (!rc)
400 ibm->flags.acpi_driver_registered = 1;
401
402 return rc;
403}
404
405
406/****************************************************************************
407 ****************************************************************************
408 *
409 * Procfs Helpers
410 *
411 ****************************************************************************
412 ****************************************************************************/
413
414static int dispatch_procfs_read(char *page, char **start, off_t off,
415 int count, int *eof, void *data)
416{
417 struct ibm_struct *ibm = data;
418 int len;
419
420 if (!ibm || !ibm->read)
421 return -EINVAL;
422
423 len = ibm->read(page);
424 if (len < 0)
425 return len;
426
427 if (len <= off + count)
428 *eof = 1;
429 *start = page + off;
430 len -= off;
431 if (len > count)
432 len = count;
433 if (len < 0)
434 len = 0;
435
436 return len;
437}
438
439static int dispatch_procfs_write(struct file *file,
440 const char __user * userbuf,
441 unsigned long count, void *data)
442{
443 struct ibm_struct *ibm = data;
444 char *kernbuf;
445 int ret;
446
447 if (!ibm || !ibm->write)
448 return -EINVAL;
449
450 kernbuf = kmalloc(count + 2, GFP_KERNEL);
451 if (!kernbuf)
452 return -ENOMEM;
453
454 if (copy_from_user(kernbuf, userbuf, count)) {
455 kfree(kernbuf);
456 return -EFAULT;
457 }
458
459 kernbuf[count] = 0;
460 strcat(kernbuf, ",");
461 ret = ibm->write(kernbuf);
462 if (ret == 0)
463 ret = count;
464
465 kfree(kernbuf);
466
467 return ret;
468}
469
470static char *next_cmd(char **cmds)
471{
472 char *start = *cmds;
473 char *end;
474
475 while ((end = strchr(start, ',')) && end == start)
476 start = end + 1;
477
478 if (!end)
479 return NULL;
480
481 *end = 0;
482 *cmds = end + 1;
483 return start;
484}
485
486
487/****************************************************************************
488 ****************************************************************************
489 *
490 * Device model: hwmon and platform
491 *
492 ****************************************************************************
493 ****************************************************************************/
494
495static struct platform_device *tpacpi_pdev = NULL;
496static struct class_device *tpacpi_hwmon = NULL;
497
498static struct platform_driver tpacpi_pdriver = {
499 .driver = {
500 .name = IBM_DRVR_NAME,
501 .owner = THIS_MODULE,
502 },
503};
504
505
506/*************************************************************************
507 * thinkpad-acpi driver attributes
508 */
509
510/* interface_version --------------------------------------------------- */
511static ssize_t tpacpi_driver_interface_version_show(
512 struct device_driver *drv,
513 char *buf)
514{
515 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
516}
517
518static DRIVER_ATTR(interface_version, S_IRUGO,
519 tpacpi_driver_interface_version_show, NULL);
520
521/* debug_level --------------------------------------------------------- */
522static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
523 char *buf)
524{
525 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
526}
527
528static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
529 const char *buf, size_t count)
530{
531 unsigned long t;
532
533 if (parse_strtoul(buf, 0xffff, &t))
534 return -EINVAL;
535
536 dbg_level = t;
537
538 return count;
539}
540
541static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
542 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
543
544/* version ------------------------------------------------------------- */
545static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
546 char *buf)
547{
548 return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
549}
550
551static DRIVER_ATTR(version, S_IRUGO,
552 tpacpi_driver_version_show, NULL);
553
554/* --------------------------------------------------------------------- */
555
556static struct driver_attribute* tpacpi_driver_attributes[] = {
557 &driver_attr_debug_level, &driver_attr_version,
558 &driver_attr_interface_version,
559};
560
561static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
562{
563 int i, res;
564
565 i = 0;
566 res = 0;
567 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
568 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
569 i++;
570 }
571
572 return res;
573}
574
575static void tpacpi_remove_driver_attributes(struct device_driver *drv)
576{
577 int i;
578
579 for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
580 driver_remove_file(drv, tpacpi_driver_attributes[i]);
581}
582
583/*************************************************************************
584 * sysfs support helpers
585 */
586
587struct attribute_set_obj {
588 struct attribute_set s;
589 struct attribute *a;
590} __attribute__((packed));
591
592static struct attribute_set *create_attr_set(unsigned int max_members,
593 const char* name)
594{
595 struct attribute_set_obj *sobj;
596
597 if (max_members == 0)
598 return NULL;
599
600 /* Allocates space for implicit NULL at the end too */
601 sobj = kzalloc(sizeof(struct attribute_set_obj) +
602 max_members * sizeof(struct attribute *),
603 GFP_KERNEL);
604 if (!sobj)
605 return NULL;
606 sobj->s.max_members = max_members;
607 sobj->s.group.attrs = &sobj->a;
608 sobj->s.group.name = name;
609
610 return &sobj->s;
611}
612
613/* not multi-threaded safe, use it in a single thread per set */
614static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
615{
616 if (!s || !attr)
617 return -EINVAL;
618
619 if (s->members >= s->max_members)
620 return -ENOMEM;
621
622 s->group.attrs[s->members] = attr;
623 s->members++;
624
625 return 0;
626}
627
628static int add_many_to_attr_set(struct attribute_set* s,
629 struct attribute **attr,
630 unsigned int count)
631{
632 int i, res;
633
634 for (i = 0; i < count; i++) {
635 res = add_to_attr_set(s, attr[i]);
636 if (res)
637 return res;
638 }
639
640 return 0;
641}
642
643static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
644{
645 sysfs_remove_group(kobj, &s->group);
646 destroy_attr_set(s);
647}
648
649static int parse_strtoul(const char *buf,
650 unsigned long max, unsigned long *value)
651{
652 char *endp;
653
654 *value = simple_strtoul(buf, &endp, 0);
655 while (*endp && isspace(*endp))
656 endp++;
657 if (*endp || *value > max)
658 return -EINVAL;
659
660 return 0;
661}
662
663/****************************************************************************
664 ****************************************************************************
665 *
666 * Subdrivers
667 *
668 ****************************************************************************
669 ****************************************************************************/
670
671/*************************************************************************
672 * thinkpad-acpi init subdriver
673 */
674
675static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
676{
677 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
678 printk(IBM_INFO "%s\n", IBM_URL);
679
680 if (ibm_thinkpad_ec_found)
681 printk(IBM_INFO "ThinkPad EC firmware %s\n",
682 ibm_thinkpad_ec_found);
683
684 return 0;
685}
686
687static int thinkpad_acpi_driver_read(char *p)
688{
689 int len = 0;
690
691 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
692 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
693
694 return len;
695}
696
697static struct ibm_struct thinkpad_acpi_driver_data = {
698 .name = "driver",
699 .read = thinkpad_acpi_driver_read,
700};
701
702/*************************************************************************
703 * Hotkey subdriver
704 */
705
706static int hotkey_orig_status;
707static int hotkey_orig_mask;
708
709static struct attribute_set *hotkey_dev_attributes = NULL;
710
711/* sysfs hotkey enable ------------------------------------------------- */
712static ssize_t hotkey_enable_show(struct device *dev,
713 struct device_attribute *attr,
714 char *buf)
715{
716 int res, status, mask;
717
718 res = hotkey_get(&status, &mask);
719 if (res)
720 return res;
721
722 return snprintf(buf, PAGE_SIZE, "%d\n", status);
723}
724
725static ssize_t hotkey_enable_store(struct device *dev,
726 struct device_attribute *attr,
727 const char *buf, size_t count)
728{
729 unsigned long t;
730 int res, status, mask;
731
732 if (parse_strtoul(buf, 1, &t))
733 return -EINVAL;
734
735 res = hotkey_get(&status, &mask);
736 if (!res)
737 res = hotkey_set(t, mask);
738
739 return (res) ? res : count;
740}
741
742static struct device_attribute dev_attr_hotkey_enable =
743 __ATTR(enable, S_IWUSR | S_IRUGO,
744 hotkey_enable_show, hotkey_enable_store);
745
746/* sysfs hotkey mask --------------------------------------------------- */
747static ssize_t hotkey_mask_show(struct device *dev,
748 struct device_attribute *attr,
749 char *buf)
750{
751 int res, status, mask;
752
753 res = hotkey_get(&status, &mask);
754 if (res)
755 return res;
756
757 return snprintf(buf, PAGE_SIZE, "0x%04x\n", mask);
758}
759
760static ssize_t hotkey_mask_store(struct device *dev,
761 struct device_attribute *attr,
762 const char *buf, size_t count)
763{
764 unsigned long t;
765 int res, status, mask;
766
767 if (parse_strtoul(buf, 0xffff, &t))
768 return -EINVAL;
769
770 res = hotkey_get(&status, &mask);
771 if (!res)
772 hotkey_set(status, t);
773
774 return (res) ? res : count;
775}
776
777static struct device_attribute dev_attr_hotkey_mask =
778 __ATTR(mask, S_IWUSR | S_IRUGO,
779 hotkey_mask_show, hotkey_mask_store);
780
781/* sysfs hotkey bios_enabled ------------------------------------------- */
782static ssize_t hotkey_bios_enabled_show(struct device *dev,
783 struct device_attribute *attr,
784 char *buf)
785{
786 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
787}
788
789static struct device_attribute dev_attr_hotkey_bios_enabled =
790 __ATTR(bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
791
792/* sysfs hotkey bios_mask ---------------------------------------------- */
793static ssize_t hotkey_bios_mask_show(struct device *dev,
794 struct device_attribute *attr,
795 char *buf)
796{
797 return snprintf(buf, PAGE_SIZE, "0x%04x\n", hotkey_orig_mask);
798}
799
800static struct device_attribute dev_attr_hotkey_bios_mask =
801 __ATTR(bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
802
803/* --------------------------------------------------------------------- */
804
805static struct attribute *hotkey_mask_attributes[] = {
806 &dev_attr_hotkey_mask.attr,
807 &dev_attr_hotkey_bios_enabled.attr,
808 &dev_attr_hotkey_bios_mask.attr,
809};
810
811static int __init hotkey_init(struct ibm_init_struct *iibm)
812{
813 int res;
814
815 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
816
817 IBM_ACPIHANDLE_INIT(hkey);
818 mutex_init(&hotkey_mutex);
819
820 /* hotkey not supported on 570 */
821 tp_features.hotkey = hkey_handle != NULL;
822
823 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
824 str_supported(tp_features.hotkey));
825
826 if (tp_features.hotkey) {
827 hotkey_dev_attributes = create_attr_set(4,
828 TPACPI_HOTKEY_SYSFS_GROUP);
829 if (!hotkey_dev_attributes)
830 return -ENOMEM;
831 res = add_to_attr_set(hotkey_dev_attributes,
832 &dev_attr_hotkey_enable.attr);
833 if (res)
834 return res;
835
836 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
837 A30, R30, R31, T20-22, X20-21, X22-24 */
838 tp_features.hotkey_mask =
839 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
840
841 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
842 str_supported(tp_features.hotkey_mask));
843
844 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
845 if (!res && tp_features.hotkey_mask) {
846 res = add_many_to_attr_set(hotkey_dev_attributes,
847 hotkey_mask_attributes,
848 ARRAY_SIZE(hotkey_mask_attributes));
849 }
850 if (!res)
851 res = register_attr_set_with_sysfs(
852 hotkey_dev_attributes,
853 &tpacpi_pdev->dev.kobj);
854
855 if (res)
856 return res;
857 }
858
859 return (tp_features.hotkey)? 0 : 1;
860}
861
862static void hotkey_exit(void)
863{
864 int res;
865
866 if (tp_features.hotkey) {
867 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
868 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
869 if (res)
870 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
871 }
872
873 if (hotkey_dev_attributes) {
874 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
875 hotkey_dev_attributes = NULL;
876 }
877}
878
879static void hotkey_notify(struct ibm_struct *ibm, u32 event)
880{
881 int hkey;
882
883 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
884 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
885 else {
886 printk(IBM_ERR "unknown hotkey event %d\n", event);
887 acpi_bus_generate_event(ibm->acpi->device, event, 0);
888 }
889}
890
891/*
892 * Call with hotkey_mutex held
893 */
894static int hotkey_get(int *status, int *mask)
895{
896 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
897 return -EIO;
898
899 if (tp_features.hotkey_mask)
900 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
901 return -EIO;
902
903 return 0;
904}
905
906/*
907 * Call with hotkey_mutex held
908 */
909static int hotkey_set(int status, int mask)
910{
911 int i;
912
913 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
914 return -EIO;
915
916 if (tp_features.hotkey_mask)
917 for (i = 0; i < 32; i++) {
918 int bit = ((1 << i) & mask) != 0;
919 if (!acpi_evalf(hkey_handle,
920 NULL, "MHKM", "vdd", i + 1, bit))
921 return -EIO;
922 }
923
924 return 0;
925}
926
927/* procfs -------------------------------------------------------------- */
928static int hotkey_read(char *p)
929{
930 int res, status, mask;
931 int len = 0;
932
933 if (!tp_features.hotkey) {
934 len += sprintf(p + len, "status:\t\tnot supported\n");
935 return len;
936 }
937
938 res = mutex_lock_interruptible(&hotkey_mutex);
939 if (res < 0)
940 return res;
941 res = hotkey_get(&status, &mask);
942 mutex_unlock(&hotkey_mutex);
943 if (res)
944 return res;
945
946 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
947 if (tp_features.hotkey_mask) {
948 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
949 len += sprintf(p + len,
950 "commands:\tenable, disable, reset, <mask>\n");
951 } else {
952 len += sprintf(p + len, "mask:\t\tnot supported\n");
953 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
954 }
955
956 return len;
957}
958
959static int hotkey_write(char *buf)
960{
961 int res, status, mask;
962 char *cmd;
963 int do_cmd = 0;
964
965 if (!tp_features.hotkey)
966 return -ENODEV;
967
968 res = mutex_lock_interruptible(&hotkey_mutex);
969 if (res < 0)
970 return res;
971
972 res = hotkey_get(&status, &mask);
973 if (res)
974 goto errexit;
975
976 res = 0;
977 while ((cmd = next_cmd(&buf))) {
978 if (strlencmp(cmd, "enable") == 0) {
979 status = 1;
980 } else if (strlencmp(cmd, "disable") == 0) {
981 status = 0;
982 } else if (strlencmp(cmd, "reset") == 0) {
983 status = hotkey_orig_status;
984 mask = hotkey_orig_mask;
985 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
986 /* mask set */
987 } else if (sscanf(cmd, "%x", &mask) == 1) {
988 /* mask set */
989 } else {
990 res = -EINVAL;
991 goto errexit;
992 }
993 do_cmd = 1;
994 }
995
996 if (do_cmd)
997 res = hotkey_set(status, mask);
998
999errexit:
1000 mutex_unlock(&hotkey_mutex);
1001 return res;
1002}
1003
1004static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1005 .hid = IBM_HKEY_HID,
1006 .notify = hotkey_notify,
1007 .handle = &hkey_handle,
1008 .type = ACPI_DEVICE_NOTIFY,
1009};
1010
1011static struct ibm_struct hotkey_driver_data = {
1012 .name = "hotkey",
1013 .read = hotkey_read,
1014 .write = hotkey_write,
1015 .exit = hotkey_exit,
1016 .acpi = &ibm_hotkey_acpidriver,
1017};
1018
1019/*************************************************************************
1020 * Bluetooth subdriver
1021 */
1022
1023/* sysfs bluetooth enable ---------------------------------------------- */
1024static ssize_t bluetooth_enable_show(struct device *dev,
1025 struct device_attribute *attr,
1026 char *buf)
1027{
1028 int status;
1029
1030 status = bluetooth_get_radiosw();
1031 if (status < 0)
1032 return status;
1033
1034 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1035}
1036
1037static ssize_t bluetooth_enable_store(struct device *dev,
1038 struct device_attribute *attr,
1039 const char *buf, size_t count)
1040{
1041 unsigned long t;
1042 int res;
1043
1044 if (parse_strtoul(buf, 1, &t))
1045 return -EINVAL;
1046
1047 res = bluetooth_set_radiosw(t);
1048
1049 return (res) ? res : count;
1050}
1051
1052static struct device_attribute dev_attr_bluetooth_enable =
1053 __ATTR(enable, S_IWUSR | S_IRUGO,
1054 bluetooth_enable_show, bluetooth_enable_store);
1055
1056/* --------------------------------------------------------------------- */
1057
1058static struct attribute *bluetooth_attributes[] = {
1059 &dev_attr_bluetooth_enable.attr,
1060 NULL
1061};
1062
1063static const struct attribute_group bluetooth_attr_group = {
1064 .name = TPACPI_BLUETH_SYSFS_GROUP,
1065 .attrs = bluetooth_attributes,
1066};
1067
1068static int __init bluetooth_init(struct ibm_init_struct *iibm)
1069{
1070 int res;
1071 int status = 0;
1072
1073 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1074
1075 IBM_ACPIHANDLE_INIT(hkey);
1076
1077 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1078 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1079 tp_features.bluetooth = hkey_handle &&
1080 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1081
1082 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1083 str_supported(tp_features.bluetooth),
1084 status);
1085
1086 if (tp_features.bluetooth) {
1087 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1088 /* no bluetooth hardware present in system */
1089 tp_features.bluetooth = 0;
1090 dbg_printk(TPACPI_DBG_INIT,
1091 "bluetooth hardware not installed\n");
1092 } else {
1093 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1094 &bluetooth_attr_group);
1095 if (res)
1096 return res;
1097 }
1098 }
1099
1100 return (tp_features.bluetooth)? 0 : 1;
1101}
1102
1103static void bluetooth_exit(void)
1104{
1105 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1106 &bluetooth_attr_group);
1107}
1108
1109static int bluetooth_get_radiosw(void)
1110{
1111 int status;
1112
1113 if (!tp_features.bluetooth)
1114 return -ENODEV;
1115
1116 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1117 return -EIO;
1118
1119 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1120}
1121
1122static int bluetooth_set_radiosw(int radio_on)
1123{
1124 int status;
1125
1126 if (!tp_features.bluetooth)
1127 return -ENODEV;
1128
1129 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1130 return -EIO;
1131 if (radio_on)
1132 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1133 else
1134 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1135 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1136 return -EIO;
1137
1138 return 0;
1139}
1140
1141/* procfs -------------------------------------------------------------- */
1142static int bluetooth_read(char *p)
1143{
1144 int len = 0;
1145 int status = bluetooth_get_radiosw();
1146
1147 if (!tp_features.bluetooth)
1148 len += sprintf(p + len, "status:\t\tnot supported\n");
1149 else {
1150 len += sprintf(p + len, "status:\t\t%s\n",
1151 (status)? "enabled" : "disabled");
1152 len += sprintf(p + len, "commands:\tenable, disable\n");
1153 }
1154
1155 return len;
1156}
1157
1158static int bluetooth_write(char *buf)
1159{
1160 char *cmd;
1161
1162 if (!tp_features.bluetooth)
1163 return -ENODEV;
1164
1165 while ((cmd = next_cmd(&buf))) {
1166 if (strlencmp(cmd, "enable") == 0) {
1167 bluetooth_set_radiosw(1);
1168 } else if (strlencmp(cmd, "disable") == 0) {
1169 bluetooth_set_radiosw(0);
1170 } else
1171 return -EINVAL;
1172 }
1173
1174 return 0;
1175}
1176
1177static struct ibm_struct bluetooth_driver_data = {
1178 .name = "bluetooth",
1179 .read = bluetooth_read,
1180 .write = bluetooth_write,
1181 .exit = bluetooth_exit,
1182};
1183
1184/*************************************************************************
1185 * Wan subdriver
1186 */
1187
1188/* sysfs wan enable ---------------------------------------------------- */
1189static ssize_t wan_enable_show(struct device *dev,
1190 struct device_attribute *attr,
1191 char *buf)
1192{
1193 int status;
1194
1195 status = wan_get_radiosw();
1196 if (status < 0)
1197 return status;
1198
1199 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1200}
1201
1202static ssize_t wan_enable_store(struct device *dev,
1203 struct device_attribute *attr,
1204 const char *buf, size_t count)
1205{
1206 unsigned long t;
1207 int res;
1208
1209 if (parse_strtoul(buf, 1, &t))
1210 return -EINVAL;
1211
1212 res = wan_set_radiosw(t);
1213
1214 return (res) ? res : count;
1215}
1216
1217static struct device_attribute dev_attr_wan_enable =
1218 __ATTR(enable, S_IWUSR | S_IRUGO,
1219 wan_enable_show, wan_enable_store);
1220
1221/* --------------------------------------------------------------------- */
1222
1223static struct attribute *wan_attributes[] = {
1224 &dev_attr_wan_enable.attr,
1225 NULL
1226};
1227
1228static const struct attribute_group wan_attr_group = {
1229 .name = TPACPI_WAN_SYSFS_GROUP,
1230 .attrs = wan_attributes,
1231};
1232
1233static int __init wan_init(struct ibm_init_struct *iibm)
1234{
1235 int res;
1236 int status = 0;
1237
1238 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1239
1240 IBM_ACPIHANDLE_INIT(hkey);
1241
1242 tp_features.wan = hkey_handle &&
1243 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1244
1245 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1246 str_supported(tp_features.wan),
1247 status);
1248
1249 if (tp_features.wan) {
1250 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1251 /* no wan hardware present in system */
1252 tp_features.wan = 0;
1253 dbg_printk(TPACPI_DBG_INIT,
1254 "wan hardware not installed\n");
1255 } else {
1256 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1257 &wan_attr_group);
1258 if (res)
1259 return res;
1260 }
1261 }
1262
1263 return (tp_features.wan)? 0 : 1;
1264}
1265
1266static void wan_exit(void)
1267{
1268 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1269 &wan_attr_group);
1270}
1271
1272static int wan_get_radiosw(void)
1273{
1274 int status;
1275
1276 if (!tp_features.wan)
1277 return -ENODEV;
1278
1279 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1280 return -EIO;
1281
1282 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1283}
1284
1285static int wan_set_radiosw(int radio_on)
1286{
1287 int status;
1288
1289 if (!tp_features.wan)
1290 return -ENODEV;
1291
1292 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1293 return -EIO;
1294 if (radio_on)
1295 status |= TP_ACPI_WANCARD_RADIOSSW;
1296 else
1297 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1298 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1299 return -EIO;
1300
1301 return 0;
1302}
1303
1304/* procfs -------------------------------------------------------------- */
1305static int wan_read(char *p)
1306{
1307 int len = 0;
1308 int status = wan_get_radiosw();
1309
1310 if (!tp_features.wan)
1311 len += sprintf(p + len, "status:\t\tnot supported\n");
1312 else {
1313 len += sprintf(p + len, "status:\t\t%s\n",
1314 (status)? "enabled" : "disabled");
1315 len += sprintf(p + len, "commands:\tenable, disable\n");
1316 }
1317
1318 return len;
1319}
1320
1321static int wan_write(char *buf)
1322{
1323 char *cmd;
1324
1325 if (!tp_features.wan)
1326 return -ENODEV;
1327
1328 while ((cmd = next_cmd(&buf))) {
1329 if (strlencmp(cmd, "enable") == 0) {
1330 wan_set_radiosw(1);
1331 } else if (strlencmp(cmd, "disable") == 0) {
1332 wan_set_radiosw(0);
1333 } else
1334 return -EINVAL;
1335 }
1336
1337 return 0;
1338}
1339
1340static struct ibm_struct wan_driver_data = {
1341 .name = "wan",
1342 .read = wan_read,
1343 .write = wan_write,
1344 .exit = wan_exit,
1345 .flags.experimental = 1,
1346};
1347
1348/*************************************************************************
1349 * Video subdriver
1350 */
1351
1352static enum video_access_mode video_supported;
1353static int video_orig_autosw;
1354
1355IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1356 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1357 "\\_SB.PCI0.VID0", /* 770e */
1358 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1359 "\\_SB.PCI0.AGP.VID", /* all others */
1360 ); /* R30, R31 */
1361
1362IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1363
1364static int __init video_init(struct ibm_init_struct *iibm)
1365{
1366 int ivga;
1367
1368 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1369
1370 IBM_ACPIHANDLE_INIT(vid);
1371 IBM_ACPIHANDLE_INIT(vid2);
1372
1373 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1374 /* G41, assume IVGA doesn't change */
1375 vid_handle = vid2_handle;
1376
1377 if (!vid_handle)
1378 /* video switching not supported on R30, R31 */
1379 video_supported = TPACPI_VIDEO_NONE;
1380 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1381 /* 570 */
1382 video_supported = TPACPI_VIDEO_570;
1383 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1384 /* 600e/x, 770e, 770x */
1385 video_supported = TPACPI_VIDEO_770;
1386 else
1387 /* all others */
1388 video_supported = TPACPI_VIDEO_NEW;
1389
1390 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1391 str_supported(video_supported != TPACPI_VIDEO_NONE),
1392 video_supported);
1393
1394 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1395}
1396
1397static void video_exit(void)
1398{
1399 dbg_printk(TPACPI_DBG_EXIT,
1400 "restoring original video autoswitch mode\n");
1401 if (video_autosw_set(video_orig_autosw))
1402 printk(IBM_ERR "error while trying to restore original "
1403 "video autoswitch mode\n");
1404}
1405
1406static int video_outputsw_get(void)
1407{
1408 int status = 0;
1409 int i;
1410
1411 switch (video_supported) {
1412 case TPACPI_VIDEO_570:
1413 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1414 TP_ACPI_VIDEO_570_PHSCMD))
1415 return -EIO;
1416 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1417 break;
1418 case TPACPI_VIDEO_770:
1419 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1420 return -EIO;
1421 if (i)
1422 status |= TP_ACPI_VIDEO_S_LCD;
1423 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1424 return -EIO;
1425 if (i)
1426 status |= TP_ACPI_VIDEO_S_CRT;
1427 break;
1428 case TPACPI_VIDEO_NEW:
1429 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1430 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1431 return -EIO;
1432 if (i)
1433 status |= TP_ACPI_VIDEO_S_CRT;
1434
1435 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1436 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1437 return -EIO;
1438 if (i)
1439 status |= TP_ACPI_VIDEO_S_LCD;
1440 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1441 return -EIO;
1442 if (i)
1443 status |= TP_ACPI_VIDEO_S_DVI;
1444 break;
1445 default:
1446 return -ENOSYS;
1447 }
1448
1449 return status;
1450}
1451
1452static int video_outputsw_set(int status)
1453{
1454 int autosw;
1455 int res = 0;
1456
1457 switch (video_supported) {
1458 case TPACPI_VIDEO_570:
1459 res = acpi_evalf(NULL, NULL,
1460 "\\_SB.PHS2", "vdd",
1461 TP_ACPI_VIDEO_570_PHS2CMD,
1462 status | TP_ACPI_VIDEO_570_PHS2SET);
1463 break;
1464 case TPACPI_VIDEO_770:
1465 autosw = video_autosw_get();
1466 if (autosw < 0)
1467 return autosw;
1468
1469 res = video_autosw_set(1);
1470 if (res)
1471 return res;
1472 res = acpi_evalf(vid_handle, NULL,
1473 "ASWT", "vdd", status * 0x100, 0);
1474 if (!autosw && video_autosw_set(autosw)) {
1475 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1476 return -EIO;
1477 }
1478 break;
1479 case TPACPI_VIDEO_NEW:
1480 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1481 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1482 break;
1483 default:
1484 return -ENOSYS;
1485 }
1486
1487 return (res)? 0 : -EIO;
1488}
1489
1490static int video_autosw_get(void)
1491{
1492 int autosw = 0;
1493
1494 switch (video_supported) {
1495 case TPACPI_VIDEO_570:
1496 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1497 return -EIO;
1498 break;
1499 case TPACPI_VIDEO_770:
1500 case TPACPI_VIDEO_NEW:
1501 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1502 return -EIO;
1503 break;
1504 default:
1505 return -ENOSYS;
1506 }
1507
1508 return autosw & 1;
1509}
1510
1511static int video_autosw_set(int enable)
1512{
1513 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1514 return -EIO;
1515 return 0;
1516}
1517
1518static int video_outputsw_cycle(void)
1519{
1520 int autosw = video_autosw_get();
1521 int res;
1522
1523 if (autosw < 0)
1524 return autosw;
1525
1526 switch (video_supported) {
1527 case TPACPI_VIDEO_570:
1528 res = video_autosw_set(1);
1529 if (res)
1530 return res;
1531 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1532 break;
1533 case TPACPI_VIDEO_770:
1534 case TPACPI_VIDEO_NEW:
1535 res = video_autosw_set(1);
1536 if (res)
1537 return res;
1538 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1539 break;
1540 default:
1541 return -ENOSYS;
1542 }
1543 if (!autosw && video_autosw_set(autosw)) {
1544 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1545 return -EIO;
1546 }
1547
1548 return (res)? 0 : -EIO;
1549}
1550
1551static int video_expand_toggle(void)
1552{
1553 switch (video_supported) {
1554 case TPACPI_VIDEO_570:
1555 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1556 0 : -EIO;
1557 case TPACPI_VIDEO_770:
1558 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1559 0 : -EIO;
1560 case TPACPI_VIDEO_NEW:
1561 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1562 0 : -EIO;
1563 default:
1564 return -ENOSYS;
1565 }
1566 /* not reached */
1567}
1568
1569static int video_read(char *p)
1570{
1571 int status, autosw;
1572 int len = 0;
1573
1574 if (video_supported == TPACPI_VIDEO_NONE) {
1575 len += sprintf(p + len, "status:\t\tnot supported\n");
1576 return len;
1577 }
1578
1579 status = video_outputsw_get();
1580 if (status < 0)
1581 return status;
1582
1583 autosw = video_autosw_get();
1584 if (autosw < 0)
1585 return autosw;
1586
1587 len += sprintf(p + len, "status:\t\tsupported\n");
1588 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1589 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1590 if (video_supported == TPACPI_VIDEO_NEW)
1591 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1592 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1593 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1594 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1595 if (video_supported == TPACPI_VIDEO_NEW)
1596 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1597 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1598 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1599
1600 return len;
1601}
1602
1603static int video_write(char *buf)
1604{
1605 char *cmd;
1606 int enable, disable, status;
1607 int res;
1608
1609 if (video_supported == TPACPI_VIDEO_NONE)
1610 return -ENODEV;
1611
1612 enable = 0;
1613 disable = 0;
1614
1615 while ((cmd = next_cmd(&buf))) {
1616 if (strlencmp(cmd, "lcd_enable") == 0) {
1617 enable |= TP_ACPI_VIDEO_S_LCD;
1618 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1619 disable |= TP_ACPI_VIDEO_S_LCD;
1620 } else if (strlencmp(cmd, "crt_enable") == 0) {
1621 enable |= TP_ACPI_VIDEO_S_CRT;
1622 } else if (strlencmp(cmd, "crt_disable") == 0) {
1623 disable |= TP_ACPI_VIDEO_S_CRT;
1624 } else if (video_supported == TPACPI_VIDEO_NEW &&
1625 strlencmp(cmd, "dvi_enable") == 0) {
1626 enable |= TP_ACPI_VIDEO_S_DVI;
1627 } else if (video_supported == TPACPI_VIDEO_NEW &&
1628 strlencmp(cmd, "dvi_disable") == 0) {
1629 disable |= TP_ACPI_VIDEO_S_DVI;
1630 } else if (strlencmp(cmd, "auto_enable") == 0) {
1631 res = video_autosw_set(1);
1632 if (res)
1633 return res;
1634 } else if (strlencmp(cmd, "auto_disable") == 0) {
1635 res = video_autosw_set(0);
1636 if (res)
1637 return res;
1638 } else if (strlencmp(cmd, "video_switch") == 0) {
1639 res = video_outputsw_cycle();
1640 if (res)
1641 return res;
1642 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1643 res = video_expand_toggle();
1644 if (res)
1645 return res;
1646 } else
1647 return -EINVAL;
1648 }
1649
1650 if (enable || disable) {
1651 status = video_outputsw_get();
1652 if (status < 0)
1653 return status;
1654 res = video_outputsw_set((status & ~disable) | enable);
1655 if (res)
1656 return res;
1657 }
1658
1659 return 0;
1660}
1661
1662static struct ibm_struct video_driver_data = {
1663 .name = "video",
1664 .read = video_read,
1665 .write = video_write,
1666 .exit = video_exit,
1667};
1668
1669/*************************************************************************
1670 * Light (thinklight) subdriver
1671 */
1672
1673IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1674IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1675
1676static int __init light_init(struct ibm_init_struct *iibm)
1677{
1678 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1679
1680 IBM_ACPIHANDLE_INIT(ledb);
1681 IBM_ACPIHANDLE_INIT(lght);
1682 IBM_ACPIHANDLE_INIT(cmos);
1683
1684 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1685 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1686
1687 if (tp_features.light)
1688 /* light status not supported on
1689 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1690 tp_features.light_status =
1691 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1692
1693 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1694 str_supported(tp_features.light));
1695
1696 return (tp_features.light)? 0 : 1;
1697}
1698
1699static int light_read(char *p)
1700{
1701 int len = 0;
1702 int status = 0;
1703
1704 if (!tp_features.light) {
1705 len += sprintf(p + len, "status:\t\tnot supported\n");
1706 } else if (!tp_features.light_status) {
1707 len += sprintf(p + len, "status:\t\tunknown\n");
1708 len += sprintf(p + len, "commands:\ton, off\n");
1709 } else {
1710 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1711 return -EIO;
1712 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1713 len += sprintf(p + len, "commands:\ton, off\n");
1714 }
1715
1716 return len;
1717}
1718
1719static int light_write(char *buf)
1720{
1721 int cmos_cmd, lght_cmd;
1722 char *cmd;
1723 int success;
1724
1725 if (!tp_features.light)
1726 return -ENODEV;
1727
1728 while ((cmd = next_cmd(&buf))) {
1729 if (strlencmp(cmd, "on") == 0) {
1730 cmos_cmd = 0x0c;
1731 lght_cmd = 1;
1732 } else if (strlencmp(cmd, "off") == 0) {
1733 cmos_cmd = 0x0d;
1734 lght_cmd = 0;
1735 } else
1736 return -EINVAL;
1737
1738 success = cmos_handle ?
1739 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1740 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1741 if (!success)
1742 return -EIO;
1743 }
1744
1745 return 0;
1746}
1747
1748static struct ibm_struct light_driver_data = {
1749 .name = "light",
1750 .read = light_read,
1751 .write = light_write,
1752};
1753
1754/*************************************************************************
1755 * Dock subdriver
1756 */
1757
1758#ifdef CONFIG_THINKPAD_ACPI_DOCK
1759
1760IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1761 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1762 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1763 "\\_SB.PCI.ISA.SLCE", /* 570 */
1764 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1765
1766/* don't list other alternatives as we install a notify handler on the 570 */
1767IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1768
1769static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1770 {
1771 .notify = dock_notify,
1772 .handle = &dock_handle,
1773 .type = ACPI_SYSTEM_NOTIFY,
1774 },
1775 {
1776 .hid = IBM_PCI_HID,
1777 .notify = dock_notify,
1778 .handle = &pci_handle,
1779 .type = ACPI_SYSTEM_NOTIFY,
1780 },
1781};
1782
1783static struct ibm_struct dock_driver_data[2] = {
1784 {
1785 .name = "dock",
1786 .read = dock_read,
1787 .write = dock_write,
1788 .acpi = &ibm_dock_acpidriver[0],
1789 },
1790 {
1791 .name = "dock",
1792 .acpi = &ibm_dock_acpidriver[1],
1793 },
1794};
1795
1796#define dock_docked() (_sta(dock_handle) & 1)
1797
1798static int __init dock_init(struct ibm_init_struct *iibm)
1799{
1800 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1801
1802 IBM_ACPIHANDLE_INIT(dock);
1803
1804 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1805 str_supported(dock_handle != NULL));
1806
1807 return (dock_handle)? 0 : 1;
1808}
1809
1810static int __init dock_init2(struct ibm_init_struct *iibm)
1811{
1812 int dock2_needed;
1813
1814 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
1815
1816 if (dock_driver_data[0].flags.acpi_driver_registered &&
1817 dock_driver_data[0].flags.acpi_notify_installed) {
1818 IBM_ACPIHANDLE_INIT(pci);
1819 dock2_needed = (pci_handle != NULL);
1820 vdbg_printk(TPACPI_DBG_INIT,
1821 "dock PCI handler for the TP 570 is %s\n",
1822 str_supported(dock2_needed));
1823 } else {
1824 vdbg_printk(TPACPI_DBG_INIT,
1825 "dock subdriver part 2 not required\n");
1826 dock2_needed = 0;
1827 }
1828
1829 return (dock2_needed)? 0 : 1;
1830}
1831
1832static void dock_notify(struct ibm_struct *ibm, u32 event)
1833{
1834 int docked = dock_docked();
1835 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1836
1837 if (event == 1 && !pci) /* 570 */
1838 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1839 else if (event == 1 && pci) /* 570 */
1840 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1841 else if (event == 3 && docked)
1842 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
1843 else if (event == 3 && !docked)
1844 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
1845 else if (event == 0 && docked)
1846 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
1847 else {
1848 printk(IBM_ERR "unknown dock event %d, status %d\n",
1849 event, _sta(dock_handle));
1850 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
1851 }
1852}
1853
1854static int dock_read(char *p)
1855{
1856 int len = 0;
1857 int docked = dock_docked();
1858
1859 if (!dock_handle)
1860 len += sprintf(p + len, "status:\t\tnot supported\n");
1861 else if (!docked)
1862 len += sprintf(p + len, "status:\t\tundocked\n");
1863 else {
1864 len += sprintf(p + len, "status:\t\tdocked\n");
1865 len += sprintf(p + len, "commands:\tdock, undock\n");
1866 }
1867
1868 return len;
1869}
1870
1871static int dock_write(char *buf)
1872{
1873 char *cmd;
1874
1875 if (!dock_docked())
1876 return -ENODEV;
1877
1878 while ((cmd = next_cmd(&buf))) {
1879 if (strlencmp(cmd, "undock") == 0) {
1880 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1881 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1882 return -EIO;
1883 } else if (strlencmp(cmd, "dock") == 0) {
1884 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1885 return -EIO;
1886 } else
1887 return -EINVAL;
1888 }
1889
1890 return 0;
1891}
1892
1893#endif /* CONFIG_THINKPAD_ACPI_DOCK */
1894
1895/*************************************************************************
1896 * Bay subdriver
1897 */
1898
1899#ifdef CONFIG_THINKPAD_ACPI_BAY
1900IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1901 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1902 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1903 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1904 ); /* A21e, R30, R31 */
1905IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1906 "_EJ0", /* all others */
1907 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1908IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1909 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1910 ); /* all others */
1911IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1912 "_EJ0", /* 770x */
1913 ); /* all others */
1914
1915static int __init bay_init(struct ibm_init_struct *iibm)
1916{
1917 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1918
1919 IBM_ACPIHANDLE_INIT(bay);
1920 if (bay_handle)
1921 IBM_ACPIHANDLE_INIT(bay_ej);
1922 IBM_ACPIHANDLE_INIT(bay2);
1923 if (bay2_handle)
1924 IBM_ACPIHANDLE_INIT(bay2_ej);
1925
1926 tp_features.bay_status = bay_handle &&
1927 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1928 tp_features.bay_status2 = bay2_handle &&
1929 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1930
1931 tp_features.bay_eject = bay_handle && bay_ej_handle &&
1932 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1933 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1934 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1935
1936 vdbg_printk(TPACPI_DBG_INIT,
1937 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1938 str_supported(tp_features.bay_status),
1939 str_supported(tp_features.bay_eject),
1940 str_supported(tp_features.bay_status2),
1941 str_supported(tp_features.bay_eject2));
1942
1943 return (tp_features.bay_status || tp_features.bay_eject ||
1944 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1945}
1946
1947static void bay_notify(struct ibm_struct *ibm, u32 event)
1948{
1949 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1950}
1951
1952#define bay_occupied(b) (_sta(b##_handle) & 1)
1953
1954static int bay_read(char *p)
1955{
1956 int len = 0;
1957 int occupied = bay_occupied(bay);
1958 int occupied2 = bay_occupied(bay2);
1959 int eject, eject2;
1960
1961 len += sprintf(p + len, "status:\t\t%s\n",
1962 tp_features.bay_status ?
1963 (occupied ? "occupied" : "unoccupied") :
1964 "not supported");
1965 if (tp_features.bay_status2)
1966 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1967 "occupied" : "unoccupied");
1968
1969 eject = tp_features.bay_eject && occupied;
1970 eject2 = tp_features.bay_eject2 && occupied2;
1971
1972 if (eject && eject2)
1973 len += sprintf(p + len, "commands:\teject, eject2\n");
1974 else if (eject)
1975 len += sprintf(p + len, "commands:\teject\n");
1976 else if (eject2)
1977 len += sprintf(p + len, "commands:\teject2\n");
1978
1979 return len;
1980}
1981
1982static int bay_write(char *buf)
1983{
1984 char *cmd;
1985
1986 if (!tp_features.bay_eject && !tp_features.bay_eject2)
1987 return -ENODEV;
1988
1989 while ((cmd = next_cmd(&buf))) {
1990 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1991 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1992 return -EIO;
1993 } else if (tp_features.bay_eject2 &&
1994 strlencmp(cmd, "eject2") == 0) {
1995 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1996 return -EIO;
1997 } else
1998 return -EINVAL;
1999 }
2000
2001 return 0;
2002}
2003
2004static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2005 .notify = bay_notify,
2006 .handle = &bay_handle,
2007 .type = ACPI_SYSTEM_NOTIFY,
2008};
2009
2010static struct ibm_struct bay_driver_data = {
2011 .name = "bay",
2012 .read = bay_read,
2013 .write = bay_write,
2014 .acpi = &ibm_bay_acpidriver,
2015};
2016
2017#endif /* CONFIG_THINKPAD_ACPI_BAY */
2018
2019/*************************************************************************
2020 * CMOS subdriver
2021 */
2022
2023/* sysfs cmos_command -------------------------------------------------- */
2024static ssize_t cmos_command_store(struct device *dev,
2025 struct device_attribute *attr,
2026 const char *buf, size_t count)
2027{
2028 unsigned long cmos_cmd;
2029 int res;
2030
2031 if (parse_strtoul(buf, 21, &cmos_cmd))
2032 return -EINVAL;
2033
2034 res = issue_thinkpad_cmos_command(cmos_cmd);
2035 return (res)? res : count;
2036}
2037
2038static struct device_attribute dev_attr_cmos_command =
2039 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2040
2041/* --------------------------------------------------------------------- */
2042
2043static int __init cmos_init(struct ibm_init_struct *iibm)
2044{
2045 int res;
2046
2047 vdbg_printk(TPACPI_DBG_INIT,
2048 "initializing cmos commands subdriver\n");
2049
2050 IBM_ACPIHANDLE_INIT(cmos);
2051
2052 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2053 str_supported(cmos_handle != NULL));
2054
2055 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2056 if (res)
2057 return res;
2058
2059 return (cmos_handle)? 0 : 1;
2060}
2061
2062static void cmos_exit(void)
2063{
2064 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2065}
2066
2067static int cmos_read(char *p)
2068{
2069 int len = 0;
2070
2071 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2072 R30, R31, T20-22, X20-21 */
2073 if (!cmos_handle)
2074 len += sprintf(p + len, "status:\t\tnot supported\n");
2075 else {
2076 len += sprintf(p + len, "status:\t\tsupported\n");
2077 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2078 }
2079
2080 return len;
2081}
2082
2083static int cmos_write(char *buf)
2084{
2085 char *cmd;
2086 int cmos_cmd, res;
2087
2088 while ((cmd = next_cmd(&buf))) {
2089 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2090 cmos_cmd >= 0 && cmos_cmd <= 21) {
2091 /* cmos_cmd set */
2092 } else
2093 return -EINVAL;
2094
2095 res = issue_thinkpad_cmos_command(cmos_cmd);
2096 if (res)
2097 return res;
2098 }
2099
2100 return 0;
2101}
2102
2103static struct ibm_struct cmos_driver_data = {
2104 .name = "cmos",
2105 .read = cmos_read,
2106 .write = cmos_write,
2107 .exit = cmos_exit,
2108};
2109
2110/*************************************************************************
2111 * LED subdriver
2112 */
2113
2114static enum led_access_mode led_supported;
2115
2116IBM_HANDLE(led, ec, "SLED", /* 570 */
2117 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2118 "LED", /* all others */
2119 ); /* R30, R31 */
2120
2121static int __init led_init(struct ibm_init_struct *iibm)
2122{
2123 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2124
2125 IBM_ACPIHANDLE_INIT(led);
2126
2127 if (!led_handle)
2128 /* led not supported on R30, R31 */
2129 led_supported = TPACPI_LED_NONE;
2130 else if (strlencmp(led_path, "SLED") == 0)
2131 /* 570 */
2132 led_supported = TPACPI_LED_570;
2133 else if (strlencmp(led_path, "SYSL") == 0)
2134 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2135 led_supported = TPACPI_LED_OLD;
2136 else
2137 /* all others */
2138 led_supported = TPACPI_LED_NEW;
2139
2140 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2141 str_supported(led_supported), led_supported);
2142
2143 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2144}
2145
2146#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2147
2148static int led_read(char *p)
2149{
2150 int len = 0;
2151
2152 if (!led_supported) {
2153 len += sprintf(p + len, "status:\t\tnot supported\n");
2154 return len;
2155 }
2156 len += sprintf(p + len, "status:\t\tsupported\n");
2157
2158 if (led_supported == TPACPI_LED_570) {
2159 /* 570 */
2160 int i, status;
2161 for (i = 0; i < 8; i++) {
2162 if (!acpi_evalf(ec_handle,
2163 &status, "GLED", "dd", 1 << i))
2164 return -EIO;
2165 len += sprintf(p + len, "%d:\t\t%s\n",
2166 i, led_status(status));
2167 }
2168 }
2169
2170 len += sprintf(p + len, "commands:\t"
2171 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2172
2173 return len;
2174}
2175
2176/* off, on, blink */
2177static const int led_sled_arg1[] = { 0, 1, 3 };
2178static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
2179static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
2180static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2181
2182static int led_write(char *buf)
2183{
2184 char *cmd;
2185 int led, ind, ret;
2186
2187 if (!led_supported)
2188 return -ENODEV;
2189
2190 while ((cmd = next_cmd(&buf))) {
2191 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2192 return -EINVAL;
2193
2194 if (strstr(cmd, "off")) {
2195 ind = 0;
2196 } else if (strstr(cmd, "on")) {
2197 ind = 1;
2198 } else if (strstr(cmd, "blink")) {
2199 ind = 2;
2200 } else
2201 return -EINVAL;
2202
2203 if (led_supported == TPACPI_LED_570) {
2204 /* 570 */
2205 led = 1 << led;
2206 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2207 led, led_sled_arg1[ind]))
2208 return -EIO;
2209 } else if (led_supported == TPACPI_LED_OLD) {
2210 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2211 led = 1 << led;
2212 ret = ec_write(TPACPI_LED_EC_HLMS, led);
2213 if (ret >= 0)
2214 ret =
2215 ec_write(TPACPI_LED_EC_HLBL,
2216 led * led_exp_hlbl[ind]);
2217 if (ret >= 0)
2218 ret =
2219 ec_write(TPACPI_LED_EC_HLCL,
2220 led * led_exp_hlcl[ind]);
2221 if (ret < 0)
2222 return ret;
2223 } else {
2224 /* all others */
2225 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2226 led, led_led_arg1[ind]))
2227 return -EIO;
2228 }
2229 }
2230
2231 return 0;
2232}
2233
2234static struct ibm_struct led_driver_data = {
2235 .name = "led",
2236 .read = led_read,
2237 .write = led_write,
2238};
2239
2240/*************************************************************************
2241 * Beep subdriver
2242 */
2243
2244IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
2245
2246static int __init beep_init(struct ibm_init_struct *iibm)
2247{
2248 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2249
2250 IBM_ACPIHANDLE_INIT(beep);
2251
2252 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2253 str_supported(beep_handle != NULL));
2254
2255 return (beep_handle)? 0 : 1;
2256}
2257
2258static int beep_read(char *p)
2259{
2260 int len = 0;
2261
2262 if (!beep_handle)
2263 len += sprintf(p + len, "status:\t\tnot supported\n");
2264 else {
2265 len += sprintf(p + len, "status:\t\tsupported\n");
2266 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2267 }
2268
2269 return len;
2270}
2271
2272static int beep_write(char *buf)
2273{
2274 char *cmd;
2275 int beep_cmd;
2276
2277 if (!beep_handle)
2278 return -ENODEV;
2279
2280 while ((cmd = next_cmd(&buf))) {
2281 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2282 beep_cmd >= 0 && beep_cmd <= 17) {
2283 /* beep_cmd set */
2284 } else
2285 return -EINVAL;
2286 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2287 return -EIO;
2288 }
2289
2290 return 0;
2291}
2292
2293static struct ibm_struct beep_driver_data = {
2294 .name = "beep",
2295 .read = beep_read,
2296 .write = beep_write,
2297};
2298
2299/*************************************************************************
2300 * Thermal subdriver
2301 */
2302
2303static enum thermal_access_mode thermal_read_mode;
2304
2305/* sysfs temp##_input -------------------------------------------------- */
2306
2307static ssize_t thermal_temp_input_show(struct device *dev,
2308 struct device_attribute *attr,
2309 char *buf)
2310{
2311 struct sensor_device_attribute *sensor_attr =
2312 to_sensor_dev_attr(attr);
2313 int idx = sensor_attr->index;
2314 s32 value;
2315 int res;
2316
2317 res = thermal_get_sensor(idx, &value);
2318 if (res)
2319 return res;
2320 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2321 return -ENXIO;
2322
2323 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2324}
2325
2326#define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2327 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2328
2329static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2330 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2331 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2332 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2333 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2334 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2335 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2336 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2337 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2338 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2339 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2340 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2341 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2342 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2343 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2344 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2345 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2346};
2347
2348#define THERMAL_ATTRS(X) \
2349 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2350
2351static struct attribute *thermal_temp_input_attr[] = {
2352 THERMAL_ATTRS(8),
2353 THERMAL_ATTRS(9),
2354 THERMAL_ATTRS(10),
2355 THERMAL_ATTRS(11),
2356 THERMAL_ATTRS(12),
2357 THERMAL_ATTRS(13),
2358 THERMAL_ATTRS(14),
2359 THERMAL_ATTRS(15),
2360 THERMAL_ATTRS(0),
2361 THERMAL_ATTRS(1),
2362 THERMAL_ATTRS(2),
2363 THERMAL_ATTRS(3),
2364 THERMAL_ATTRS(4),
2365 THERMAL_ATTRS(5),
2366 THERMAL_ATTRS(6),
2367 THERMAL_ATTRS(7),
2368 NULL
2369};
2370
2371static const struct attribute_group thermal_temp_input16_group = {
2372 .attrs = thermal_temp_input_attr
2373};
2374
2375static const struct attribute_group thermal_temp_input8_group = {
2376 .attrs = &thermal_temp_input_attr[8]
2377};
2378
2379#undef THERMAL_SENSOR_ATTR_TEMP
2380#undef THERMAL_ATTRS
2381
2382/* --------------------------------------------------------------------- */
2383
2384static int __init thermal_init(struct ibm_init_struct *iibm)
2385{
2386 u8 t, ta1, ta2;
2387 int i;
2388 int acpi_tmp7;
2389 int res;
2390
2391 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2392
2393 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2394
2395 if (ibm_thinkpad_ec_found && experimental) {
2396 /*
2397 * Direct EC access mode: sensors at registers
2398 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2399 * non-implemented, thermal sensors return 0x80 when
2400 * not available
2401 */
2402
2403 ta1 = ta2 = 0;
2404 for (i = 0; i < 8; i++) {
2405 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2406 ta1 |= t;
2407 } else {
2408 ta1 = 0;
2409 break;
2410 }
2411 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2412 ta2 |= t;
2413 } else {
2414 ta1 = 0;
2415 break;
2416 }
2417 }
2418 if (ta1 == 0) {
2419 /* This is sheer paranoia, but we handle it anyway */
2420 if (acpi_tmp7) {
2421 printk(IBM_ERR
2422 "ThinkPad ACPI EC access misbehaving, "
2423 "falling back to ACPI TMPx access mode\n");
2424 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2425 } else {
2426 printk(IBM_ERR
2427 "ThinkPad ACPI EC access misbehaving, "
2428 "disabling thermal sensors access\n");
2429 thermal_read_mode = TPACPI_THERMAL_NONE;
2430 }
2431 } else {
2432 thermal_read_mode =
2433 (ta2 != 0) ?
2434 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2435 }
2436 } else if (acpi_tmp7) {
2437 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2438 /* 600e/x, 770e, 770x */
2439 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2440 } else {
2441 /* Standard ACPI TMPx access, max 8 sensors */
2442 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2443 }
2444 } else {
2445 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2446 thermal_read_mode = TPACPI_THERMAL_NONE;
2447 }
2448
2449 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2450 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2451 thermal_read_mode);
2452
2453 switch(thermal_read_mode) {
2454 case TPACPI_THERMAL_TPEC_16:
2455 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2456 &thermal_temp_input16_group);
2457 if (res)
2458 return res;
2459 break;
2460 case TPACPI_THERMAL_TPEC_8:
2461 case TPACPI_THERMAL_ACPI_TMP07:
2462 case TPACPI_THERMAL_ACPI_UPDT:
2463 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2464 &thermal_temp_input8_group);
2465 if (res)
2466 return res;
2467 break;
2468 case TPACPI_THERMAL_NONE:
2469 default:
2470 return 1;
2471 }
2472
2473 return 0;
2474}
2475
2476static void thermal_exit(void)
2477{
2478 switch(thermal_read_mode) {
2479 case TPACPI_THERMAL_TPEC_16:
2480 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2481 &thermal_temp_input16_group);
2482 break;
2483 case TPACPI_THERMAL_TPEC_8:
2484 case TPACPI_THERMAL_ACPI_TMP07:
2485 case TPACPI_THERMAL_ACPI_UPDT:
2486 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2487 &thermal_temp_input16_group);
2488 break;
2489 case TPACPI_THERMAL_NONE:
2490 default:
2491 break;
2492 }
2493}
2494
2495/* idx is zero-based */
2496static int thermal_get_sensor(int idx, s32 *value)
2497{
2498 int t;
2499 s8 tmp;
2500 char tmpi[5];
2501
2502 t = TP_EC_THERMAL_TMP0;
2503
2504 switch (thermal_read_mode) {
2505#if TPACPI_MAX_THERMAL_SENSORS >= 16
2506 case TPACPI_THERMAL_TPEC_16:
2507 if (idx >= 8 && idx <= 15) {
2508 t = TP_EC_THERMAL_TMP8;
2509 idx -= 8;
2510 }
2511 /* fallthrough */
2512#endif
2513 case TPACPI_THERMAL_TPEC_8:
2514 if (idx <= 7) {
2515 if (!acpi_ec_read(t + idx, &tmp))
2516 return -EIO;
2517 *value = tmp * 1000;
2518 return 0;
2519 }
2520 break;
2521
2522 case TPACPI_THERMAL_ACPI_UPDT:
2523 if (idx <= 7) {
2524 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2525 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2526 return -EIO;
2527 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2528 return -EIO;
2529 *value = (t - 2732) * 100;
2530 return 0;
2531 }
2532 break;
2533
2534 case TPACPI_THERMAL_ACPI_TMP07:
2535 if (idx <= 7) {
2536 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2537 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2538 return -EIO;
2539 *value = t * 1000;
2540 return 0;
2541 }
2542 break;
2543
2544 case TPACPI_THERMAL_NONE:
2545 default:
2546 return -ENOSYS;
2547 }
2548
2549 return -EINVAL;
2550}
2551
2552static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2553{
2554 int res, i;
2555 int n;
2556
2557 n = 8;
2558 i = 0;
2559
2560 if (!s)
2561 return -EINVAL;
2562
2563 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2564 n = 16;
2565
2566 for(i = 0 ; i < n; i++) {
2567 res = thermal_get_sensor(i, &s->temp[i]);
2568 if (res)
2569 return res;
2570 }
2571
2572 return n;
2573}
2574
2575static int thermal_read(char *p)
2576{
2577 int len = 0;
2578 int n, i;
2579 struct ibm_thermal_sensors_struct t;
2580
2581 n = thermal_get_sensors(&t);
2582 if (unlikely(n < 0))
2583 return n;
2584
2585 len += sprintf(p + len, "temperatures:\t");
2586
2587 if (n > 0) {
2588 for (i = 0; i < (n - 1); i++)
2589 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2590 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2591 } else
2592 len += sprintf(p + len, "not supported\n");
2593
2594 return len;
2595}
2596
2597static struct ibm_struct thermal_driver_data = {
2598 .name = "thermal",
2599 .read = thermal_read,
2600 .exit = thermal_exit,
2601};
2602
2603/*************************************************************************
2604 * EC Dump subdriver
2605 */
2606
2607static u8 ecdump_regs[256];
2608
2609static int ecdump_read(char *p)
2610{
2611 int len = 0;
2612 int i, j;
2613 u8 v;
2614
2615 len += sprintf(p + len, "EC "
2616 " +00 +01 +02 +03 +04 +05 +06 +07"
2617 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2618 for (i = 0; i < 256; i += 16) {
2619 len += sprintf(p + len, "EC 0x%02x:", i);
2620 for (j = 0; j < 16; j++) {
2621 if (!acpi_ec_read(i + j, &v))
2622 break;
2623 if (v != ecdump_regs[i + j])
2624 len += sprintf(p + len, " *%02x", v);
2625 else
2626 len += sprintf(p + len, " %02x", v);
2627 ecdump_regs[i + j] = v;
2628 }
2629 len += sprintf(p + len, "\n");
2630 if (j != 16)
2631 break;
2632 }
2633
2634 /* These are way too dangerous to advertise openly... */
2635#if 0
2636 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2637 " (<offset> is 00-ff, <value> is 00-ff)\n");
2638 len += sprintf(p + len, "commands:\t0x<offset> <value> "
2639 " (<offset> is 00-ff, <value> is 0-255)\n");
2640#endif
2641 return len;
2642}
2643
2644static int ecdump_write(char *buf)
2645{
2646 char *cmd;
2647 int i, v;
2648
2649 while ((cmd = next_cmd(&buf))) {
2650 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2651 /* i and v set */
2652 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2653 /* i and v set */
2654 } else
2655 return -EINVAL;
2656 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2657 if (!acpi_ec_write(i, v))
2658 return -EIO;
2659 } else
2660 return -EINVAL;
2661 }
2662
2663 return 0;
2664}
2665
2666static struct ibm_struct ecdump_driver_data = {
2667 .name = "ecdump",
2668 .read = ecdump_read,
2669 .write = ecdump_write,
2670 .flags.experimental = 1,
2671};
2672
2673/*************************************************************************
2674 * Backlight/brightness subdriver
2675 */
2676
2677static struct backlight_device *ibm_backlight_device = NULL;
2678
2679static struct backlight_ops ibm_backlight_data = {
2680 .get_brightness = brightness_get,
2681 .update_status = brightness_update_status,
2682};
2683
2684static int __init brightness_init(struct ibm_init_struct *iibm)
2685{
2686 int b;
2687
2688 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2689
2690 b = brightness_get(NULL);
2691 if (b < 0)
2692 return b;
2693
2694 ibm_backlight_device = backlight_device_register(
2695 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2696 &ibm_backlight_data);
2697 if (IS_ERR(ibm_backlight_device)) {
2698 printk(IBM_ERR "Could not register backlight device\n");
2699 return PTR_ERR(ibm_backlight_device);
2700 }
2701 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2702
2703 ibm_backlight_device->props.max_brightness = 7;
2704 ibm_backlight_device->props.brightness = b;
2705 backlight_update_status(ibm_backlight_device);
2706
2707 return 0;
2708}
2709
2710static void brightness_exit(void)
2711{
2712 if (ibm_backlight_device) {
2713 vdbg_printk(TPACPI_DBG_EXIT,
2714 "calling backlight_device_unregister()\n");
2715 backlight_device_unregister(ibm_backlight_device);
2716 ibm_backlight_device = NULL;
2717 }
2718}
2719
2720static int brightness_update_status(struct backlight_device *bd)
2721{
2722 return brightness_set(
2723 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2724 bd->props.power == FB_BLANK_UNBLANK) ?
2725 bd->props.brightness : 0);
2726}
2727
2728static int brightness_get(struct backlight_device *bd)
2729{
2730 u8 level;
2731 if (!acpi_ec_read(brightness_offset, &level))
2732 return -EIO;
2733
2734 level &= 0x7;
2735
2736 return level;
2737}
2738
2739static int brightness_set(int value)
2740{
2741 int cmos_cmd, inc, i;
2742 int current_value = brightness_get(NULL);
2743
2744 value &= 7;
2745
2746 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2747 inc = value > current_value ? 1 : -1;
2748 for (i = current_value; i != value; i += inc) {
2749 if (issue_thinkpad_cmos_command(cmos_cmd))
2750 return -EIO;
2751 if (!acpi_ec_write(brightness_offset, i + inc))
2752 return -EIO;
2753 }
2754
2755 return 0;
2756}
2757
2758static int brightness_read(char *p)
2759{
2760 int len = 0;
2761 int level;
2762
2763 if ((level = brightness_get(NULL)) < 0) {
2764 len += sprintf(p + len, "level:\t\tunreadable\n");
2765 } else {
2766 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2767 len += sprintf(p + len, "commands:\tup, down\n");
2768 len += sprintf(p + len, "commands:\tlevel <level>"
2769 " (<level> is 0-7)\n");
2770 }
2771
2772 return len;
2773}
2774
2775static int brightness_write(char *buf)
2776{
2777 int level;
2778 int new_level;
2779 char *cmd;
2780
2781 while ((cmd = next_cmd(&buf))) {
2782 if ((level = brightness_get(NULL)) < 0)
2783 return level;
2784 level &= 7;
2785
2786 if (strlencmp(cmd, "up") == 0) {
2787 new_level = level == 7 ? 7 : level + 1;
2788 } else if (strlencmp(cmd, "down") == 0) {
2789 new_level = level == 0 ? 0 : level - 1;
2790 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2791 new_level >= 0 && new_level <= 7) {
2792 /* new_level set */
2793 } else
2794 return -EINVAL;
2795
2796 brightness_set(new_level);
2797 }
2798
2799 return 0;
2800}
2801
2802static struct ibm_struct brightness_driver_data = {
2803 .name = "brightness",
2804 .read = brightness_read,
2805 .write = brightness_write,
2806 .exit = brightness_exit,
2807};
2808
2809/*************************************************************************
2810 * Volume subdriver
2811 */
2812
2813static int volume_read(char *p)
2814{
2815 int len = 0;
2816 u8 level;
2817
2818 if (!acpi_ec_read(volume_offset, &level)) {
2819 len += sprintf(p + len, "level:\t\tunreadable\n");
2820 } else {
2821 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2822 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2823 len += sprintf(p + len, "commands:\tup, down, mute\n");
2824 len += sprintf(p + len, "commands:\tlevel <level>"
2825 " (<level> is 0-15)\n");
2826 }
2827
2828 return len;
2829}
2830
2831static int volume_write(char *buf)
2832{
2833 int cmos_cmd, inc, i;
2834 u8 level, mute;
2835 int new_level, new_mute;
2836 char *cmd;
2837
2838 while ((cmd = next_cmd(&buf))) {
2839 if (!acpi_ec_read(volume_offset, &level))
2840 return -EIO;
2841 new_mute = mute = level & 0x40;
2842 new_level = level = level & 0xf;
2843
2844 if (strlencmp(cmd, "up") == 0) {
2845 if (mute)
2846 new_mute = 0;
2847 else
2848 new_level = level == 15 ? 15 : level + 1;
2849 } else if (strlencmp(cmd, "down") == 0) {
2850 if (mute)
2851 new_mute = 0;
2852 else
2853 new_level = level == 0 ? 0 : level - 1;
2854 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2855 new_level >= 0 && new_level <= 15) {
2856 /* new_level set */
2857 } else if (strlencmp(cmd, "mute") == 0) {
2858 new_mute = 0x40;
2859 } else
2860 return -EINVAL;
2861
2862 if (new_level != level) { /* mute doesn't change */
2863 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2864 inc = new_level > level ? 1 : -1;
2865
2866 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2867 !acpi_ec_write(volume_offset, level)))
2868 return -EIO;
2869
2870 for (i = level; i != new_level; i += inc)
2871 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2872 !acpi_ec_write(volume_offset, i + inc))
2873 return -EIO;
2874
2875 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2876 !acpi_ec_write(volume_offset,
2877 new_level + mute)))
2878 return -EIO;
2879 }
2880
2881 if (new_mute != mute) { /* level doesn't change */
2882 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2883
2884 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2885 !acpi_ec_write(volume_offset, level + new_mute))
2886 return -EIO;
2887 }
2888 }
2889
2890 return 0;
2891}
2892
2893static struct ibm_struct volume_driver_data = {
2894 .name = "volume",
2895 .read = volume_read,
2896 .write = volume_write,
2897};
2898
2899/*************************************************************************
2900 * Fan subdriver
2901 */
2902
2903/*
2904 * FAN ACCESS MODES
2905 *
2906 * TPACPI_FAN_RD_ACPI_GFAN:
2907 * ACPI GFAN method: returns fan level
2908 *
2909 * see TPACPI_FAN_WR_ACPI_SFAN
2910 * EC 0x2f (HFSP) not available if GFAN exists
2911 *
2912 * TPACPI_FAN_WR_ACPI_SFAN:
2913 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2914 *
2915 * EC 0x2f (HFSP) might be available *for reading*, but do not use
2916 * it for writing.
2917 *
2918 * TPACPI_FAN_WR_TPEC:
2919 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
2920 * Supported on almost all ThinkPads
2921 *
2922 * Fan speed changes of any sort (including those caused by the
2923 * disengaged mode) are usually done slowly by the firmware as the
2924 * maximum ammount of fan duty cycle change per second seems to be
2925 * limited.
2926 *
2927 * Reading is not available if GFAN exists.
2928 * Writing is not available if SFAN exists.
2929 *
2930 * Bits
2931 * 7 automatic mode engaged;
2932 * (default operation mode of the ThinkPad)
2933 * fan level is ignored in this mode.
2934 * 6 full speed mode (takes precedence over bit 7);
2935 * not available on all thinkpads. May disable
2936 * the tachometer while the fan controller ramps up
2937 * the speed (which can take up to a few *minutes*).
2938 * Speeds up fan to 100% duty-cycle, which is far above
2939 * the standard RPM levels. It is not impossible that
2940 * it could cause hardware damage.
2941 * 5-3 unused in some models. Extra bits for fan level
2942 * in others, but still useless as all values above
2943 * 7 map to the same speed as level 7 in these models.
2944 * 2-0 fan level (0..7 usually)
2945 * 0x00 = stop
2946 * 0x07 = max (set when temperatures critical)
2947 * Some ThinkPads may have other levels, see
2948 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2949 *
2950 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2951 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2952 * does so, its initial value is meaningless (0x07).
2953 *
2954 * For firmware bugs, refer to:
2955 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2956 *
2957 * ----
2958 *
2959 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2960 * Main fan tachometer reading (in RPM)
2961 *
2962 * This register is present on all ThinkPads with a new-style EC, and
2963 * it is known not to be present on the A21m/e, and T22, as there is
2964 * something else in offset 0x84 according to the ACPI DSDT. Other
2965 * ThinkPads from this same time period (and earlier) probably lack the
2966 * tachometer as well.
2967 *
2968 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2969 * was never fixed by IBM to report the EC firmware version string
2970 * probably support the tachometer (like the early X models), so
2971 * detecting it is quite hard. We need more data to know for sure.
2972 *
2973 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2974 * might result.
2975 *
2976 * FIRMWARE BUG: may go stale while the EC is switching to full speed
2977 * mode.
2978 *
2979 * For firmware bugs, refer to:
2980 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2981 *
2982 * TPACPI_FAN_WR_ACPI_FANS:
2983 * ThinkPad X31, X40, X41. Not available in the X60.
2984 *
2985 * FANS ACPI handle: takes three arguments: low speed, medium speed,
2986 * high speed. ACPI DSDT seems to map these three speeds to levels
2987 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2988 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2989 *
2990 * The speeds are stored on handles
2991 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2992 *
2993 * There are three default speed sets, acessible as handles:
2994 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2995 *
2996 * ACPI DSDT switches which set is in use depending on various
2997 * factors.
2998 *
2999 * TPACPI_FAN_WR_TPEC is also available and should be used to
3000 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
3001 * but the ACPI tables just mention level 7.
3002 */
3003
3004static enum fan_status_access_mode fan_status_access_mode;
3005static enum fan_control_access_mode fan_control_access_mode;
3006static enum fan_control_commands fan_control_commands;
3007
3008static u8 fan_control_initial_status;
3009static u8 fan_control_desired_level;
3010
3011static void fan_watchdog_fire(struct work_struct *ignored);
3012static int fan_watchdog_maxinterval;
3013static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3014
3015IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
3016IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
3017 "\\FSPD", /* 600e/x, 770e, 770x */
3018 ); /* all others */
3019IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
3020 "JFNS", /* 770x-JL */
3021 ); /* all others */
3022
3023/*
3024 * SYSFS fan layout: hwmon compatible (device)
3025 *
3026 * pwm*_enable:
3027 * 0: "disengaged" mode
3028 * 1: manual mode
3029 * 2: native EC "auto" mode (recommended, hardware default)
3030 *
3031 * pwm*: set speed in manual mode, ignored otherwise.
3032 * 0 is level 0; 255 is level 7. Intermediate points done with linear
3033 * interpolation.
3034 *
3035 * fan*_input: tachometer reading, RPM
3036 *
3037 *
3038 * SYSFS fan layout: extensions
3039 *
3040 * fan_watchdog (driver):
3041 * fan watchdog interval in seconds, 0 disables (default), max 120
3042 */
3043
3044/* sysfs fan pwm1_enable ----------------------------------------------- */
3045static ssize_t fan_pwm1_enable_show(struct device *dev,
3046 struct device_attribute *attr,
3047 char *buf)
3048{
3049 int res, mode;
3050 u8 status;
3051
3052 res = fan_get_status_safe(&status);
3053 if (res)
3054 return res;
3055
3056 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3057 if (status != fan_control_initial_status) {
3058 tp_features.fan_ctrl_status_undef = 0;
3059 } else {
3060 /* Return most likely status. In fact, it
3061 * might be the only possible status */
3062 status = TP_EC_FAN_AUTO;
3063 }
3064 }
3065
3066 if (status & TP_EC_FAN_FULLSPEED) {
3067 mode = 0;
3068 } else if (status & TP_EC_FAN_AUTO) {
3069 mode = 2;
3070 } else
3071 mode = 1;
3072
3073 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3074}
3075
3076static ssize_t fan_pwm1_enable_store(struct device *dev,
3077 struct device_attribute *attr,
3078 const char *buf, size_t count)
3079{
3080 unsigned long t;
3081 int res, level;
3082
3083 if (parse_strtoul(buf, 2, &t))
3084 return -EINVAL;
3085
3086 switch (t) {
3087 case 0:
3088 level = TP_EC_FAN_FULLSPEED;
3089 break;
3090 case 1:
3091 level = TPACPI_FAN_LAST_LEVEL;
3092 break;
3093 case 2:
3094 level = TP_EC_FAN_AUTO;
3095 break;
3096 case 3:
3097 /* reserved for software-controlled auto mode */
3098 return -ENOSYS;
3099 default:
3100 return -EINVAL;
3101 }
3102
3103 res = fan_set_level_safe(level);
3104 if (res == -ENXIO)
3105 return -EINVAL;
3106 else if (res < 0)
3107 return res;
3108
3109 fan_watchdog_reset();
3110
3111 return count;
3112}
3113
3114static struct device_attribute dev_attr_fan_pwm1_enable =
3115 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3116 fan_pwm1_enable_show, fan_pwm1_enable_store);
3117
3118/* sysfs fan pwm1 ------------------------------------------------------ */
3119static ssize_t fan_pwm1_show(struct device *dev,
3120 struct device_attribute *attr,
3121 char *buf)
3122{
3123 int res;
3124 u8 status;
3125
3126 res = fan_get_status_safe(&status);
3127 if (res)
3128 return res;
3129
3130 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3131 if (status != fan_control_initial_status) {
3132 tp_features.fan_ctrl_status_undef = 0;
3133 } else {
3134 status = TP_EC_FAN_AUTO;
3135 }
3136 }
3137
3138 if ((status &
3139 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3140 status = fan_control_desired_level;
3141
3142 if (status > 7)
3143 status = 7;
3144
3145 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3146}
3147
3148static ssize_t fan_pwm1_store(struct device *dev,
3149 struct device_attribute *attr,
3150 const char *buf, size_t count)
3151{
3152 unsigned long s;
3153 int rc;
3154 u8 status, newlevel;
3155
3156 if (parse_strtoul(buf, 255, &s))
3157 return -EINVAL;
3158
3159 /* scale down from 0-255 to 0-7 */
3160 newlevel = (s >> 5) & 0x07;
3161
3162 rc = mutex_lock_interruptible(&fan_mutex);
3163 if (rc < 0)
3164 return rc;
3165
3166 rc = fan_get_status(&status);
3167 if (!rc && (status &
3168 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3169 rc = fan_set_level(newlevel);
3170 if (rc == -ENXIO)
3171 rc = -EINVAL;
3172 else if (!rc) {
3173 fan_update_desired_level(newlevel);
3174 fan_watchdog_reset();
3175 }
3176 }
3177
3178 mutex_unlock(&fan_mutex);
3179 return (rc)? rc : count;
3180}
3181
3182static struct device_attribute dev_attr_fan_pwm1 =
3183 __ATTR(pwm1, S_IWUSR | S_IRUGO,
3184 fan_pwm1_show, fan_pwm1_store);
3185
3186/* sysfs fan fan1_input ------------------------------------------------ */
3187static ssize_t fan_fan1_input_show(struct device *dev,
3188 struct device_attribute *attr,
3189 char *buf)
3190{
3191 int res;
3192 unsigned int speed;
3193
3194 res = fan_get_speed(&speed);
3195 if (res < 0)
3196 return res;
3197
3198 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3199}
3200
3201static struct device_attribute dev_attr_fan_fan1_input =
3202 __ATTR(fan1_input, S_IRUGO,
3203 fan_fan1_input_show, NULL);
3204
3205/* sysfs fan fan_watchdog (driver) ------------------------------------- */
3206static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3207 char *buf)
3208{
3209 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3210}
3211
3212static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3213 const char *buf, size_t count)
3214{
3215 unsigned long t;
3216
3217 if (parse_strtoul(buf, 120, &t))
3218 return -EINVAL;
3219
3220 if (!fan_control_allowed)
3221 return -EPERM;
3222
3223 fan_watchdog_maxinterval = t;
3224 fan_watchdog_reset();
3225
3226 return count;
3227}
3228
3229static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3230 fan_fan_watchdog_show, fan_fan_watchdog_store);
3231
3232/* --------------------------------------------------------------------- */
3233static struct attribute *fan_attributes[] = {
3234 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3235 &dev_attr_fan_fan1_input.attr,
3236 NULL
3237};
3238
3239static const struct attribute_group fan_attr_group = {
3240 .attrs = fan_attributes,
3241};
3242
3243static int __init fan_init(struct ibm_init_struct *iibm)
3244{
3245 int rc;
3246
3247 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3248
3249 mutex_init(&fan_mutex);
3250 fan_status_access_mode = TPACPI_FAN_NONE;
3251 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3252 fan_control_commands = 0;
3253 fan_watchdog_maxinterval = 0;
3254 tp_features.fan_ctrl_status_undef = 0;
3255 fan_control_desired_level = 7;
3256
3257 IBM_ACPIHANDLE_INIT(fans);
3258 IBM_ACPIHANDLE_INIT(gfan);
3259 IBM_ACPIHANDLE_INIT(sfan);
3260
3261 if (gfan_handle) {
3262 /* 570, 600e/x, 770e, 770x */
3263 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3264 } else {
3265 /* all other ThinkPads: note that even old-style
3266 * ThinkPad ECs supports the fan control register */
3267 if (likely(acpi_ec_read(fan_status_offset,
3268 &fan_control_initial_status))) {
3269 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3270
3271 /* In some ThinkPads, neither the EC nor the ACPI
3272 * DSDT initialize the fan status, and it ends up
3273 * being set to 0x07 when it *could* be either
3274 * 0x07 or 0x80.
3275 *
3276 * Enable for TP-1Y (T43), TP-78 (R51e),
3277 * TP-76 (R52), TP-70 (T43, R52), which are known
3278 * to be buggy. */
3279 if (fan_control_initial_status == 0x07 &&
3280 ibm_thinkpad_ec_found &&
3281 ((ibm_thinkpad_ec_found[0] == '1' &&
3282 ibm_thinkpad_ec_found[1] == 'Y') ||
3283 (ibm_thinkpad_ec_found[0] == '7' &&
3284 (ibm_thinkpad_ec_found[1] == '6' ||
3285 ibm_thinkpad_ec_found[1] == '8' ||
3286 ibm_thinkpad_ec_found[1] == '0'))
3287 )) {
3288 printk(IBM_NOTICE
3289 "fan_init: initial fan status is "
3290 "unknown, assuming it is in auto "
3291 "mode\n");
3292 tp_features.fan_ctrl_status_undef = 1;
3293 }
3294 } else {
3295 printk(IBM_ERR
3296 "ThinkPad ACPI EC access misbehaving, "
3297 "fan status and control unavailable\n");
3298 return 1;
3299 }
3300 }
3301
3302 if (sfan_handle) {
3303 /* 570, 770x-JL */
3304 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3305 fan_control_commands |=
3306 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3307 } else {
3308 if (!gfan_handle) {
3309 /* gfan without sfan means no fan control */
3310 /* all other models implement TP EC 0x2f control */
3311
3312 if (fans_handle) {
3313 /* X31, X40, X41 */
3314 fan_control_access_mode =
3315 TPACPI_FAN_WR_ACPI_FANS;
3316 fan_control_commands |=
3317 TPACPI_FAN_CMD_SPEED |
3318 TPACPI_FAN_CMD_LEVEL |
3319 TPACPI_FAN_CMD_ENABLE;
3320 } else {
3321 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3322 fan_control_commands |=
3323 TPACPI_FAN_CMD_LEVEL |
3324 TPACPI_FAN_CMD_ENABLE;
3325 }
3326 }
3327 }
3328
3329 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3330 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3331 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3332 fan_status_access_mode, fan_control_access_mode);
3333
3334 /* fan control master switch */
3335 if (!fan_control_allowed) {
3336 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3337 fan_control_commands = 0;
3338 dbg_printk(TPACPI_DBG_INIT,
3339 "fan control features disabled by parameter\n");
3340 }
3341
3342 /* update fan_control_desired_level */
3343 if (fan_status_access_mode != TPACPI_FAN_NONE)
3344 fan_get_status_safe(NULL);
3345
3346 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3347 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3348 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3349 &fan_attr_group);
3350 if (!(rc < 0))
3351 rc = driver_create_file(&tpacpi_pdriver.driver,
3352 &driver_attr_fan_watchdog);
3353 if (rc < 0)
3354 return rc;
3355 return 0;
3356 } else
3357 return 1;
3358}
3359
3360/*
3361 * Call with fan_mutex held
3362 */
3363static void fan_update_desired_level(u8 status)
3364{
3365 if ((status &
3366 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3367 if (status > 7)
3368 fan_control_desired_level = 7;
3369 else
3370 fan_control_desired_level = status;
3371 }
3372}
3373
3374static int fan_get_status(u8 *status)
3375{
3376 u8 s;
3377
3378 /* TODO:
3379 * Add TPACPI_FAN_RD_ACPI_FANS ? */
3380
3381 switch (fan_status_access_mode) {
3382 case TPACPI_FAN_RD_ACPI_GFAN:
3383 /* 570, 600e/x, 770e, 770x */
3384
3385 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3386 return -EIO;
3387
3388 if (likely(status))
3389 *status = s & 0x07;
3390
3391 break;
3392
3393 case TPACPI_FAN_RD_TPEC:
3394 /* all except 570, 600e/x, 770e, 770x */
3395 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3396 return -EIO;
3397
3398 if (likely(status))
3399 *status = s;
3400
3401 break;
3402
3403 default:
3404 return -ENXIO;
3405 }
3406
3407 return 0;
3408}
3409
3410static int fan_get_status_safe(u8 *status)
3411{
3412 int rc;
3413 u8 s;
3414
3415 rc = mutex_lock_interruptible(&fan_mutex);
3416 if (rc < 0)
3417 return rc;
3418 rc = fan_get_status(&s);
3419 if (!rc)
3420 fan_update_desired_level(s);
3421 mutex_unlock(&fan_mutex);
3422
3423 if (status)
3424 *status = s;
3425
3426 return rc;
3427}
3428
3429static void fan_exit(void)
3430{
3431 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3432
3433 /* FIXME: can we really do this unconditionally? */
3434 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3435 driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3436
3437 cancel_delayed_work(&fan_watchdog_task);
3438 flush_scheduled_work();
3439}
3440
3441static int fan_get_speed(unsigned int *speed)
3442{
3443 u8 hi, lo;
3444
3445 switch (fan_status_access_mode) {
3446 case TPACPI_FAN_RD_TPEC:
3447 /* all except 570, 600e/x, 770e, 770x */
3448 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3449 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3450 return -EIO;
3451
3452 if (likely(speed))
3453 *speed = (hi << 8) | lo;
3454
3455 break;
3456
3457 default:
3458 return -ENXIO;
3459 }
3460
3461 return 0;
3462}
3463
3464static void fan_watchdog_fire(struct work_struct *ignored)
3465{
3466 int rc;
3467
3468 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3469 rc = fan_set_enable();
3470 if (rc < 0) {
3471 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3472 "will try again later...\n", -rc);
3473 /* reschedule for later */
3474 fan_watchdog_reset();
3475 }
3476}
3477
3478static void fan_watchdog_reset(void)
3479{
3480 static int fan_watchdog_active = 0;
3481
3482 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3483 return;
3484
3485 if (fan_watchdog_active)
3486 cancel_delayed_work(&fan_watchdog_task);
3487
3488 if (fan_watchdog_maxinterval > 0) {
3489 fan_watchdog_active = 1;
3490 if (!schedule_delayed_work(&fan_watchdog_task,
3491 msecs_to_jiffies(fan_watchdog_maxinterval
3492 * 1000))) {
3493 printk(IBM_ERR "failed to schedule the fan watchdog, "
3494 "watchdog will not trigger\n");
3495 }
3496 } else
3497 fan_watchdog_active = 0;
3498}
3499
3500static int fan_set_level(int level)
3501{
3502 if (!fan_control_allowed)
3503 return -EPERM;
3504
3505 switch (fan_control_access_mode) {
3506 case TPACPI_FAN_WR_ACPI_SFAN:
3507 if (level >= 0 && level <= 7) {
3508 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3509 return -EIO;
3510 } else
3511 return -EINVAL;
3512 break;
3513
3514 case TPACPI_FAN_WR_ACPI_FANS:
3515 case TPACPI_FAN_WR_TPEC:
3516 if ((level != TP_EC_FAN_AUTO) &&
3517 (level != TP_EC_FAN_FULLSPEED) &&
3518 ((level < 0) || (level > 7)))
3519 return -EINVAL;
3520
3521 /* safety net should the EC not support AUTO
3522 * or FULLSPEED mode bits and just ignore them */
3523 if (level & TP_EC_FAN_FULLSPEED)
3524 level |= 7; /* safety min speed 7 */
3525 else if (level & TP_EC_FAN_FULLSPEED)
3526 level |= 4; /* safety min speed 4 */
3527
3528 if (!acpi_ec_write(fan_status_offset, level))
3529 return -EIO;
3530 else
3531 tp_features.fan_ctrl_status_undef = 0;
3532 break;
3533
3534 default:
3535 return -ENXIO;
3536 }
3537 return 0;
3538}
3539
3540static int fan_set_level_safe(int level)
3541{
3542 int rc;
3543
3544 if (!fan_control_allowed)
3545 return -EPERM;
3546
3547 rc = mutex_lock_interruptible(&fan_mutex);
3548 if (rc < 0)
3549 return rc;
3550
3551 if (level == TPACPI_FAN_LAST_LEVEL)
3552 level = fan_control_desired_level;
3553
3554 rc = fan_set_level(level);
3555 if (!rc)
3556 fan_update_desired_level(level);
3557
3558 mutex_unlock(&fan_mutex);
3559 return rc;
3560}
3561
3562static int fan_set_enable(void)
3563{
3564 u8 s;
3565 int rc;
3566
3567 if (!fan_control_allowed)
3568 return -EPERM;
3569
3570 rc = mutex_lock_interruptible(&fan_mutex);
3571 if (rc < 0)
3572 return rc;
3573
3574 switch (fan_control_access_mode) {
3575 case TPACPI_FAN_WR_ACPI_FANS:
3576 case TPACPI_FAN_WR_TPEC:
3577 rc = fan_get_status(&s);
3578 if (rc < 0)
3579 break;
3580
3581 /* Don't go out of emergency fan mode */
3582 if (s != 7) {
3583 s &= 0x07;
3584 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3585 }
3586
3587 if (!acpi_ec_write(fan_status_offset, s))
3588 rc = -EIO;
3589 else {
3590 tp_features.fan_ctrl_status_undef = 0;
3591 rc = 0;
3592 }
3593 break;
3594
3595 case TPACPI_FAN_WR_ACPI_SFAN:
3596 rc = fan_get_status(&s);
3597 if (rc < 0)
3598 break;
3599
3600 s &= 0x07;
3601
3602 /* Set fan to at least level 4 */
3603 s |= 4;
3604
3605 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3606 rc= -EIO;
3607 else
3608 rc = 0;
3609 break;
3610
3611 default:
3612 rc = -ENXIO;
3613 }
3614
3615 mutex_unlock(&fan_mutex);
3616 return rc;
3617}
3618
3619static int fan_set_disable(void)
3620{
3621 int rc;
3622
3623 if (!fan_control_allowed)
3624 return -EPERM;
3625
3626 rc = mutex_lock_interruptible(&fan_mutex);
3627 if (rc < 0)
3628 return rc;
3629
3630 rc = 0;
3631 switch (fan_control_access_mode) {
3632 case TPACPI_FAN_WR_ACPI_FANS:
3633 case TPACPI_FAN_WR_TPEC:
3634 if (!acpi_ec_write(fan_status_offset, 0x00))
3635 rc = -EIO;
3636 else {
3637 fan_control_desired_level = 0;
3638 tp_features.fan_ctrl_status_undef = 0;
3639 }
3640 break;
3641
3642 case TPACPI_FAN_WR_ACPI_SFAN:
3643 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
3644 rc = -EIO;
3645 else
3646 fan_control_desired_level = 0;
3647 break;
3648
3649 default:
3650 rc = -ENXIO;
3651 }
3652
3653
3654 mutex_unlock(&fan_mutex);
3655 return rc;
3656}
3657
3658static int fan_set_speed(int speed)
3659{
3660 int rc;
3661
3662 if (!fan_control_allowed)
3663 return -EPERM;
3664
3665 rc = mutex_lock_interruptible(&fan_mutex);
3666 if (rc < 0)
3667 return rc;
3668
3669 rc = 0;
3670 switch (fan_control_access_mode) {
3671 case TPACPI_FAN_WR_ACPI_FANS:
3672 if (speed >= 0 && speed <= 65535) {
3673 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3674 speed, speed, speed))
3675 rc = -EIO;
3676 } else
3677 rc = -EINVAL;
3678 break;
3679
3680 default:
3681 rc = -ENXIO;
3682 }
3683
3684 mutex_unlock(&fan_mutex);
3685 return rc;
3686}
3687
3688static int fan_read(char *p)
3689{
3690 int len = 0;
3691 int rc;
3692 u8 status;
3693 unsigned int speed = 0;
3694
3695 switch (fan_status_access_mode) {
3696 case TPACPI_FAN_RD_ACPI_GFAN:
3697 /* 570, 600e/x, 770e, 770x */
3698 if ((rc = fan_get_status_safe(&status)) < 0)
3699 return rc;
3700
3701 len += sprintf(p + len, "status:\t\t%s\n"
3702 "level:\t\t%d\n",
3703 (status != 0) ? "enabled" : "disabled", status);
3704 break;
3705
3706 case TPACPI_FAN_RD_TPEC:
3707 /* all except 570, 600e/x, 770e, 770x */
3708 if ((rc = fan_get_status_safe(&status)) < 0)
3709 return rc;
3710
3711 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3712 if (status != fan_control_initial_status)
3713 tp_features.fan_ctrl_status_undef = 0;
3714 else
3715 /* Return most likely status. In fact, it
3716 * might be the only possible status */
3717 status = TP_EC_FAN_AUTO;
3718 }
3719
3720 len += sprintf(p + len, "status:\t\t%s\n",
3721 (status != 0) ? "enabled" : "disabled");
3722
3723 if ((rc = fan_get_speed(&speed)) < 0)
3724 return rc;
3725
3726 len += sprintf(p + len, "speed:\t\t%d\n", speed);
3727
3728 if (status & TP_EC_FAN_FULLSPEED)
3729 /* Disengaged mode takes precedence */
3730 len += sprintf(p + len, "level:\t\tdisengaged\n");
3731 else if (status & TP_EC_FAN_AUTO)
3732 len += sprintf(p + len, "level:\t\tauto\n");
3733 else
3734 len += sprintf(p + len, "level:\t\t%d\n", status);
3735 break;
3736
3737 case TPACPI_FAN_NONE:
3738 default:
3739 len += sprintf(p + len, "status:\t\tnot supported\n");
3740 }
3741
3742 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
3743 len += sprintf(p + len, "commands:\tlevel <level>");
3744
3745 switch (fan_control_access_mode) {
3746 case TPACPI_FAN_WR_ACPI_SFAN:
3747 len += sprintf(p + len, " (<level> is 0-7)\n");
3748 break;
3749
3750 default:
3751 len += sprintf(p + len, " (<level> is 0-7, "
3752 "auto, disengaged, full-speed)\n");
3753 break;
3754 }
3755 }
3756
3757 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
3758 len += sprintf(p + len, "commands:\tenable, disable\n"
3759 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
3760 "1-120 (seconds))\n");
3761
3762 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
3763 len += sprintf(p + len, "commands:\tspeed <speed>"
3764 " (<speed> is 0-65535)\n");
3765
3766 return len;
3767}
3768
3769static int fan_write_cmd_level(const char *cmd, int *rc)
3770{
3771 int level;
3772
3773 if (strlencmp(cmd, "level auto") == 0)
3774 level = TP_EC_FAN_AUTO;
3775 else if ((strlencmp(cmd, "level disengaged") == 0) |
3776 (strlencmp(cmd, "level full-speed") == 0))
3777 level = TP_EC_FAN_FULLSPEED;
3778 else if (sscanf(cmd, "level %d", &level) != 1)
3779 return 0;
3780
3781 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
3782 printk(IBM_ERR "level command accepted for unsupported "
3783 "access mode %d", fan_control_access_mode);
3784
3785 return 1;
3786}
3787
3788static int fan_write_cmd_enable(const char *cmd, int *rc)
3789{
3790 if (strlencmp(cmd, "enable") != 0)
3791 return 0;
3792
3793 if ((*rc = fan_set_enable()) == -ENXIO)
3794 printk(IBM_ERR "enable command accepted for unsupported "
3795 "access mode %d", fan_control_access_mode);
3796
3797 return 1;
3798}
3799
3800static int fan_write_cmd_disable(const char *cmd, int *rc)
3801{
3802 if (strlencmp(cmd, "disable") != 0)
3803 return 0;
3804
3805 if ((*rc = fan_set_disable()) == -ENXIO)
3806 printk(IBM_ERR "disable command accepted for unsupported "
3807 "access mode %d", fan_control_access_mode);
3808
3809 return 1;
3810}
3811
3812static int fan_write_cmd_speed(const char *cmd, int *rc)
3813{
3814 int speed;
3815
3816 /* TODO:
3817 * Support speed <low> <medium> <high> ? */
3818
3819 if (sscanf(cmd, "speed %d", &speed) != 1)
3820 return 0;
3821
3822 if ((*rc = fan_set_speed(speed)) == -ENXIO)
3823 printk(IBM_ERR "speed command accepted for unsupported "
3824 "access mode %d", fan_control_access_mode);
3825
3826 return 1;
3827}
3828
3829static int fan_write_cmd_watchdog(const char *cmd, int *rc)
3830{
3831 int interval;
3832
3833 if (sscanf(cmd, "watchdog %d", &interval) != 1)
3834 return 0;
3835
3836 if (interval < 0 || interval > 120)
3837 *rc = -EINVAL;
3838 else
3839 fan_watchdog_maxinterval = interval;
3840
3841 return 1;
3842}
3843
3844static int fan_write(char *buf)
3845{
3846 char *cmd;
3847 int rc = 0;
3848
3849 while (!rc && (cmd = next_cmd(&buf))) {
3850 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
3851 fan_write_cmd_level(cmd, &rc)) &&
3852 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
3853 (fan_write_cmd_enable(cmd, &rc) ||
3854 fan_write_cmd_disable(cmd, &rc) ||
3855 fan_write_cmd_watchdog(cmd, &rc))) &&
3856 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
3857 fan_write_cmd_speed(cmd, &rc))
3858 )
3859 rc = -EINVAL;
3860 else if (!rc)
3861 fan_watchdog_reset();
3862 }
3863
3864 return rc;
3865}
3866
3867static struct ibm_struct fan_driver_data = {
3868 .name = "fan",
3869 .read = fan_read,
3870 .write = fan_write,
3871 .exit = fan_exit,
3872};
3873
3874/****************************************************************************
3875 ****************************************************************************
3876 *
3877 * Infrastructure
3878 *
3879 ****************************************************************************
3880 ****************************************************************************/
3881
3882/* /proc support */
3883static struct proc_dir_entry *proc_dir = NULL;
3884
3885/* Subdriver registry */
3886static LIST_HEAD(tpacpi_all_drivers);
3887
3888
3889/*
3890 * Module and infrastructure proble, init and exit handling
3891 */
3892
3893#ifdef CONFIG_THINKPAD_ACPI_DEBUG
3894static const char * __init str_supported(int is_supported)
3895{
3896 static char text_unsupported[] __initdata = "not supported";
3897
3898 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
3899}
3900#endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3901
3902static int __init ibm_init(struct ibm_init_struct *iibm)
3903{
3904 int ret;
3905 struct ibm_struct *ibm = iibm->data;
3906 struct proc_dir_entry *entry;
3907
3908 BUG_ON(ibm == NULL);
3909
3910 INIT_LIST_HEAD(&ibm->all_drivers);
3911
3912 if (ibm->flags.experimental && !experimental)
3913 return 0;
3914
3915 dbg_printk(TPACPI_DBG_INIT,
3916 "probing for %s\n", ibm->name);
3917
3918 if (iibm->init) {
3919 ret = iibm->init(iibm);
3920 if (ret > 0)
3921 return 0; /* probe failed */
3922 if (ret)
3923 return ret;
3924
3925 ibm->flags.init_called = 1;
3926 }
3927
3928 if (ibm->acpi) {
3929 if (ibm->acpi->hid) {
3930 ret = register_tpacpi_subdriver(ibm);
3931 if (ret)
3932 goto err_out;
3933 }
3934
3935 if (ibm->acpi->notify) {
3936 ret = setup_acpi_notify(ibm);
3937 if (ret == -ENODEV) {
3938 printk(IBM_NOTICE "disabling subdriver %s\n",
3939 ibm->name);
3940 ret = 0;
3941 goto err_out;
3942 }
3943 if (ret < 0)
3944 goto err_out;
3945 }
3946 }
3947
3948 dbg_printk(TPACPI_DBG_INIT,
3949 "%s installed\n", ibm->name);
3950
3951 if (ibm->read) {
3952 entry = create_proc_entry(ibm->name,
3953 S_IFREG | S_IRUGO | S_IWUSR,
3954 proc_dir);
3955 if (!entry) {
3956 printk(IBM_ERR "unable to create proc entry %s\n",
3957 ibm->name);
3958 ret = -ENODEV;
3959 goto err_out;
3960 }
3961 entry->owner = THIS_MODULE;
3962 entry->data = ibm;
3963 entry->read_proc = &dispatch_procfs_read;
3964 if (ibm->write)
3965 entry->write_proc = &dispatch_procfs_write;
3966 ibm->flags.proc_created = 1;
3967 }
3968
3969 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
3970
3971 return 0;
3972
3973err_out:
3974 dbg_printk(TPACPI_DBG_INIT,
3975 "%s: at error exit path with result %d\n",
3976 ibm->name, ret);
3977
3978 ibm_exit(ibm);
3979 return (ret < 0)? ret : 0;
3980}
3981
3982static void ibm_exit(struct ibm_struct *ibm)
3983{
3984 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
3985
3986 list_del_init(&ibm->all_drivers);
3987
3988 if (ibm->flags.acpi_notify_installed) {
3989 dbg_printk(TPACPI_DBG_EXIT,
3990 "%s: acpi_remove_notify_handler\n", ibm->name);
3991 BUG_ON(!ibm->acpi);
3992 acpi_remove_notify_handler(*ibm->acpi->handle,
3993 ibm->acpi->type,
3994 dispatch_acpi_notify);
3995 ibm->flags.acpi_notify_installed = 0;
3996 ibm->flags.acpi_notify_installed = 0;
3997 }
3998
3999 if (ibm->flags.proc_created) {
4000 dbg_printk(TPACPI_DBG_EXIT,
4001 "%s: remove_proc_entry\n", ibm->name);
4002 remove_proc_entry(ibm->name, proc_dir);
4003 ibm->flags.proc_created = 0;
4004 }
4005
4006 if (ibm->flags.acpi_driver_registered) {
4007 dbg_printk(TPACPI_DBG_EXIT,
4008 "%s: acpi_bus_unregister_driver\n", ibm->name);
4009 BUG_ON(!ibm->acpi);
4010 acpi_bus_unregister_driver(ibm->acpi->driver);
4011 kfree(ibm->acpi->driver);
4012 ibm->acpi->driver = NULL;
4013 ibm->flags.acpi_driver_registered = 0;
4014 }
4015
4016 if (ibm->flags.init_called && ibm->exit) {
4017 ibm->exit();
4018 ibm->flags.init_called = 0;
4019 }
4020
4021 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4022}
4023
4024/* Probing */
4025
4026static char *ibm_thinkpad_ec_found = NULL;
4027
4028static char* __init check_dmi_for_ec(void)
4029{
4030 struct dmi_device *dev = NULL;
4031 char ec_fw_string[18];
4032
4033 /*
4034 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4035 * X32 or newer, all Z series; Some models must have an
4036 * up-to-date BIOS or they will not be detected.
4037 *
4038 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4039 */
4040 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4041 if (sscanf(dev->name,
4042 "IBM ThinkPad Embedded Controller -[%17c",
4043 ec_fw_string) == 1) {
4044 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4045 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4046 return kstrdup(ec_fw_string, GFP_KERNEL);
4047 }
4048 }
4049 return NULL;
4050}
4051
4052static int __init probe_for_thinkpad(void)
4053{
4054 int is_thinkpad;
4055
4056 if (acpi_disabled)
4057 return -ENODEV;
4058
4059 /*
4060 * Non-ancient models have better DMI tagging, but very old models
4061 * don't.
4062 */
4063 is_thinkpad = dmi_name_in_vendors("ThinkPad");
4064
4065 /* ec is required because many other handles are relative to it */
4066 IBM_ACPIHANDLE_INIT(ec);
4067 if (!ec_handle) {
4068 if (is_thinkpad)
4069 printk(IBM_ERR
4070 "Not yet supported ThinkPad detected!\n");
4071 return -ENODEV;
4072 }
4073
4074 /*
4075 * Risks a regression on very old machines, but reduces potential
4076 * false positives a damn great deal
4077 */
4078 if (!is_thinkpad)
4079 is_thinkpad = dmi_name_in_vendors("IBM");
4080
4081 if (!is_thinkpad && !force_load)
4082 return -ENODEV;
4083
4084 return 0;
4085}
4086
4087
4088/* Module init, exit, parameters */
4089
4090static struct ibm_init_struct ibms_init[] __initdata = {
4091 {
4092 .init = thinkpad_acpi_driver_init,
4093 .data = &thinkpad_acpi_driver_data,
4094 },
4095 {
4096 .init = hotkey_init,
4097 .data = &hotkey_driver_data,
4098 },
4099 {
4100 .init = bluetooth_init,
4101 .data = &bluetooth_driver_data,
4102 },
4103 {
4104 .init = wan_init,
4105 .data = &wan_driver_data,
4106 },
4107 {
4108 .init = video_init,
4109 .data = &video_driver_data,
4110 },
4111 {
4112 .init = light_init,
4113 .data = &light_driver_data,
4114 },
4115#ifdef CONFIG_THINKPAD_ACPI_DOCK
4116 {
4117 .init = dock_init,
4118 .data = &dock_driver_data[0],
4119 },
4120 {
4121 .init = dock_init2,
4122 .data = &dock_driver_data[1],
4123 },
4124#endif
4125#ifdef CONFIG_THINKPAD_ACPI_BAY
4126 {
4127 .init = bay_init,
4128 .data = &bay_driver_data,
4129 },
4130#endif
4131 {
4132 .init = cmos_init,
4133 .data = &cmos_driver_data,
4134 },
4135 {
4136 .init = led_init,
4137 .data = &led_driver_data,
4138 },
4139 {
4140 .init = beep_init,
4141 .data = &beep_driver_data,
4142 },
4143 {
4144 .init = thermal_init,
4145 .data = &thermal_driver_data,
4146 },
4147 {
4148 .data = &ecdump_driver_data,
4149 },
4150 {
4151 .init = brightness_init,
4152 .data = &brightness_driver_data,
4153 },
4154 {
4155 .data = &volume_driver_data,
4156 },
4157 {
4158 .init = fan_init,
4159 .data = &fan_driver_data,
4160 },
4161};
4162
4163static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4164{
4165 unsigned int i;
4166 struct ibm_struct *ibm;
4167
4168 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4169 ibm = ibms_init[i].data;
4170 BUG_ON(ibm == NULL);
4171
4172 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4173 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4174 return -ENOSPC;
4175 strcpy(ibms_init[i].param, val);
4176 strcat(ibms_init[i].param, ",");
4177 return 0;
4178 }
4179 }
4180
4181 return -EINVAL;
4182}
4183
4184static int experimental;
4185module_param(experimental, int, 0);
4186
4187static u32 dbg_level;
4188module_param_named(debug, dbg_level, uint, 0);
4189
4190static int force_load;
4191module_param(force_load, int, 0);
4192
4193static int fan_control_allowed;
4194module_param_named(fan_control, fan_control_allowed, int, 0);
4195
4196#define IBM_PARAM(feature) \
4197 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4198
4199IBM_PARAM(hotkey);
4200IBM_PARAM(bluetooth);
4201IBM_PARAM(video);
4202IBM_PARAM(light);
4203#ifdef CONFIG_THINKPAD_ACPI_DOCK
4204IBM_PARAM(dock);
4205#endif
4206#ifdef CONFIG_THINKPAD_ACPI_BAY
4207IBM_PARAM(bay);
4208#endif /* CONFIG_THINKPAD_ACPI_BAY */
4209IBM_PARAM(cmos);
4210IBM_PARAM(led);
4211IBM_PARAM(beep);
4212IBM_PARAM(ecdump);
4213IBM_PARAM(brightness);
4214IBM_PARAM(volume);
4215IBM_PARAM(fan);
4216
4217static int __init thinkpad_acpi_module_init(void)
4218{
4219 int ret, i;
4220
4221 /* Driver-level probe */
4222 ret = probe_for_thinkpad();
4223 if (ret)
4224 return ret;
4225
4226 /* Driver initialization */
4227 ibm_thinkpad_ec_found = check_dmi_for_ec();
4228 IBM_ACPIHANDLE_INIT(ecrd);
4229 IBM_ACPIHANDLE_INIT(ecwr);
4230
4231 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4232 if (!proc_dir) {
4233 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4234 thinkpad_acpi_module_exit();
4235 return -ENODEV;
4236 }
4237 proc_dir->owner = THIS_MODULE;
4238
4239 ret = platform_driver_register(&tpacpi_pdriver);
4240 if (ret) {
4241 printk(IBM_ERR "unable to register platform driver\n");
4242 thinkpad_acpi_module_exit();
4243 return ret;
4244 }
4245 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4246 if (ret) {
4247 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4248 thinkpad_acpi_module_exit();
4249 return ret;
4250 }
4251
4252
4253 /* Device initialization */
4254 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4255 NULL, 0);
4256 if (IS_ERR(tpacpi_pdev)) {
4257 ret = PTR_ERR(tpacpi_pdev);
4258 tpacpi_pdev = NULL;
4259 printk(IBM_ERR "unable to register platform device\n");
4260 thinkpad_acpi_module_exit();
4261 return ret;
4262 }
4263 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4264 if (IS_ERR(tpacpi_hwmon)) {
4265 ret = PTR_ERR(tpacpi_hwmon);
4266 tpacpi_hwmon = NULL;
4267 printk(IBM_ERR "unable to register hwmon device\n");
4268 thinkpad_acpi_module_exit();
4269 return ret;
4270 }
4271 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4272 ret = ibm_init(&ibms_init[i]);
4273 if (ret >= 0 && *ibms_init[i].param)
4274 ret = ibms_init[i].data->write(ibms_init[i].param);
4275 if (ret < 0) {
4276 thinkpad_acpi_module_exit();
4277 return ret;
4278 }
4279 }
4280
4281 return 0;
4282}
4283
4284static void thinkpad_acpi_module_exit(void)
4285{
4286 struct ibm_struct *ibm, *itmp;
4287
4288 list_for_each_entry_safe_reverse(ibm, itmp,
4289 &tpacpi_all_drivers,
4290 all_drivers) {
4291 ibm_exit(ibm);
4292 }
4293
4294 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4295
4296 if (tpacpi_hwmon)
4297 hwmon_device_unregister(tpacpi_hwmon);
4298
4299 if (tpacpi_pdev)
4300 platform_device_unregister(tpacpi_pdev);
4301
4302 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4303 platform_driver_unregister(&tpacpi_pdriver);
4304
4305 if (proc_dir)
4306 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4307
4308 kfree(ibm_thinkpad_ec_found);
4309}
4310
4311module_init(thinkpad_acpi_module_init);
4312module_exit(thinkpad_acpi_module_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-04 03:54:48 -0500