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ACPI: thinkpad-acpi: improve dock subdriver initialization
[deliverable/linux.git] / drivers / misc / thinkpad_acpi.c
CommitLineData
1da177e4 1/*
643f12db 2 * thinkpad_acpi.c - ThinkPad ACPI Extras
1da177e4
LT		 3 *
4 *
78f81cc4 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
a62bc916 6 * Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
1da177e4
LT		 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
a62bc916
HMH		 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
78f81cc4
BD		 22 */
23
643f12db 24#define IBM_VERSION "0.14"
176750d6 25#define TPACPI_SYSFS_VERSION 0x000100
78f81cc4
BD		 26
27/*
1da177e4 28 * Changelog:
643f12db
HMH		 29 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
30 * drivers/misc.
f9ff43a6
HMH		 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.
837ca6dd 35 *
78f81cc4
BD		 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
837ca6dd 45 * 2005-01-16 0.10 fix module loading on R30, R31
78f81cc4
BD		 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
1da177e4
LT		 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
78f81cc4
BD		 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
1da177e4
LT		 83 */
84
f21f85de 85#include "thinkpad_acpi.h"
1da177e4 86
f9ff43a6 87MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
78f81cc4
BD		 88MODULE_DESCRIPTION(IBM_DESC);
89MODULE_VERSION(IBM_VERSION);
90MODULE_LICENSE("GPL");
91
d903ac54
HMH		 92/* Please remove this in year 2009 */
93MODULE_ALIAS("ibm_acpi");
94
1da177e4
LT		 95#define __unused __attribute__ ((unused))
96
56b6aeb0
HMH		 97/****************************************************************************
98 ****************************************************************************
99 *
100 * ACPI Helpers and device model
101 *
102 ****************************************************************************
103 ****************************************************************************/
104
105/*************************************************************************
106 * ACPI basic handles
107 */
1da177e4
LT		 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; \
78f81cc4 114 static char *object##_path; \
1da177e4
LT		 115 static char *object##_paths[] = { paths }
116
78f81cc4
BD		 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 */
56b6aeb0 124 );
78f81cc4 125
56b6aeb0
HMH		 126IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
127IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
78f81cc4 128
56b6aeb0
HMH		 129
130/*************************************************************************
131 * Misc ACPI handles
132 */
78f81cc4
BD		 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 */
56b6aeb0 137 ); /* all others */
78f81cc4
BD		 138
139IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
140 "^HKEY", /* R30, R31 */
141 "HKEY", /* all others */
56b6aeb0 142 ); /* 570 */
78f81cc4 143
78f81cc4 144
56b6aeb0
HMH		 145/*************************************************************************
146 * ACPI helpers
a8b7a662
HMH		 147 */
148
1da177e4
LT		 149static int acpi_evalf(acpi_handle handle,
150 void *res, char *method, char *fmt, ...)
151{
152 char *fmt0 = fmt;
78f81cc4
BD		 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;
1da177e4
LT		 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;
78f81cc4 187 /* add more types as needed */
1da177e4
LT		 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
78f81cc4
BD		 196 if (res_type != 'v') {
197 result.length = sizeof(out_obj);
198 result.pointer = &out_obj;
199 resultp = &result;
200 } else
201 resultp = NULL;
1da177e4 202
78f81cc4 203 status = acpi_evaluate_object(handle, method, &params, resultp);
1da177e4
LT		 204
205 switch (res_type) {
78f81cc4 206 case 'd': /* int */
1da177e4
LT		 207 if (res)
208 *(int *)res = out_obj.integer.value;
209 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
210 break;
78f81cc4 211 case 'v': /* void */
1da177e4
LT		 212 success = status == AE_OK;
213 break;
78f81cc4 214 /* add more types as needed */
1da177e4
LT		 215 default:
216 printk(IBM_ERR "acpi_evalf() called "
217 "with invalid format character '%c'\n", res_type);
218 return 0;
219 }
220
56b6aeb0
HMH		 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
c9bea99c
HMH		 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
56b6aeb0
HMH		 288/*************************************************************************
289 * ACPI device model
290 */
291
8d376cd6 292static void drv_acpi_handle_init(char *name,
5fba344c
HMH		 293 acpi_handle *handle, acpi_handle parent,
294 char **paths, int num_paths, char **path)
56b6aeb0
HMH		 295{
296 int i;
297 acpi_status status;
298
5ae930e6
HMH		 299 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
300 name);
301
56b6aeb0
HMH		 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];
5ae930e6
HMH		 306 dbg_printk(TPACPI_DBG_INIT,
307 "Found ACPI handle %s for %s\n",
308 *path, name);
56b6aeb0
HMH		 309 return;
310 }
311 }
312
5ae930e6
HMH		 313 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
314 name);
56b6aeb0
HMH		 315 *handle = NULL;
316}
317
8d376cd6 318static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
56b6aeb0
HMH		 319{
320 struct ibm_struct *ibm = data;
321
8d376cd6 322 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
56b6aeb0
HMH		 323 return;
324
8d376cd6 325 ibm->acpi->notify(ibm, event);
56b6aeb0
HMH		 326}
327
8d376cd6 328static int __init setup_acpi_notify(struct ibm_struct *ibm)
56b6aeb0
HMH		 329{
330 acpi_status status;
5ae930e6 331 int rc;
56b6aeb0 332
8d376cd6
HMH		 333 BUG_ON(!ibm->acpi);
334
335 if (!*ibm->acpi->handle)
56b6aeb0
HMH		 336 return 0;
337
5ae930e6 338 vdbg_printk(TPACPI_DBG_INIT,
fe08bc4b
HMH		 339 "setting up ACPI notify for %s\n", ibm->name);
340
5ae930e6
HMH		 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);
56b6aeb0
HMH		 345 return -ENODEV;
346 }
347
8d376cd6
HMH		 348 acpi_driver_data(ibm->acpi->device) = ibm;
349 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
643f12db
HMH		 350 IBM_ACPI_EVENT_PREFIX,
351 ibm->name);
56b6aeb0 352
8d376cd6
HMH		 353 status = acpi_install_notify_handler(*ibm->acpi->handle,
354 ibm->acpi->type, dispatch_acpi_notify, ibm);
56b6aeb0
HMH		 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 }
8d376cd6 365 ibm->flags.acpi_notify_installed = 1;
56b6aeb0
HMH		 366 return 0;
367}
368
8d376cd6 369static int __init tpacpi_device_add(struct acpi_device *device)
56b6aeb0
HMH		 370{
371 return 0;
372}
373
6700121b 374static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
56b6aeb0 375{
5ae930e6 376 int rc;
56b6aeb0 377
fe08bc4b
HMH		 378 dbg_printk(TPACPI_DBG_INIT,
379 "registering %s as an ACPI driver\n", ibm->name);
380
8d376cd6
HMH		 381 BUG_ON(!ibm->acpi);
382
383 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
384 if (!ibm->acpi->driver) {
5fba344c
HMH		 385 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
386 return -ENOMEM;
56b6aeb0
HMH		 387 }
388
8d376cd6
HMH		 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;
56b6aeb0 392
5ae930e6
HMH		 393 rc = acpi_bus_register_driver(ibm->acpi->driver);
394 if (rc < 0) {
56b6aeb0 395 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
5ae930e6 396 ibm->acpi->hid, rc);
8d376cd6
HMH		 397 kfree(ibm->acpi->driver);
398 ibm->acpi->driver = NULL;
5ae930e6 399 } else if (!rc)
8d376cd6 400 ibm->flags.acpi_driver_registered = 1;
56b6aeb0 401
5ae930e6 402 return rc;
56b6aeb0
HMH		 403}
404
405
406/****************************************************************************
407 ****************************************************************************
408 *
409 * Procfs Helpers
410 *
411 ****************************************************************************
412 ****************************************************************************/
413
8d376cd6
HMH		 414static int dispatch_procfs_read(char *page, char **start, off_t off,
415 int count, int *eof, void *data)
56b6aeb0
HMH		 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
8d376cd6
HMH		 439static int dispatch_procfs_write(struct file *file,
440 const char __user * userbuf,
441 unsigned long count, void *data)
56b6aeb0
HMH		 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;
1da177e4 453
56b6aeb0
HMH		 454 if (copy_from_user(kernbuf, userbuf, count)) {
455 kfree(kernbuf);
456 return -EFAULT;
457 }
1da177e4 458
56b6aeb0
HMH		 459 kernbuf[count] = 0;
460 strcat(kernbuf, ",");
461 ret = ibm->write(kernbuf);
462 if (ret == 0)
463 ret = count;
1da177e4 464
56b6aeb0
HMH		 465 kfree(kernbuf);
466
467 return ret;
1da177e4
LT		 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
56b6aeb0 486
54ae1501
HMH		 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
176750d6
HMH		 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;
176750d6 532
7252374a 533 if (parse_strtoul(buf, 0xffff, &t))
176750d6
HMH		 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
7252374a
HMH		 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
56b6aeb0
HMH		 663/****************************************************************************
664 ****************************************************************************
665 *
666 * Subdrivers
667 *
668 ****************************************************************************
669 ****************************************************************************/
670
671/*************************************************************************
142cfc90 672 * thinkpad-acpi init subdriver
56b6aeb0
HMH		 673 */
674
a5763f22 675static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1da177e4
LT		 676{
677 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
678 printk(IBM_INFO "%s\n", IBM_URL);
679
3945ac36
HMH		 680 if (ibm_thinkpad_ec_found)
681 printk(IBM_INFO "ThinkPad EC firmware %s\n",
682 ibm_thinkpad_ec_found);
683
1da177e4
LT		 684 return 0;
685}
686
643f12db 687static int thinkpad_acpi_driver_read(char *p)
1da177e4
LT		 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
a5763f22
HMH		 697static struct ibm_struct thinkpad_acpi_driver_data = {
698 .name = "driver",
699 .read = thinkpad_acpi_driver_read,
700};
701
56b6aeb0
HMH		 702/*************************************************************************
703 * Hotkey subdriver
704 */
705
78f81cc4
BD		 706static int hotkey_orig_status;
707static int hotkey_orig_mask;
708
a5763f22 709static int __init hotkey_init(struct ibm_init_struct *iibm)
56b6aeb0 710{
b86c4722
HMH		 711 int res;
712
fe08bc4b
HMH		 713 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
714
8d376cd6 715 IBM_ACPIHANDLE_INIT(hkey);
40ca9fdf 716 mutex_init(&hotkey_mutex);
5fba344c 717
56b6aeb0 718 /* hotkey not supported on 570 */
d8fd94d9 719 tp_features.hotkey = hkey_handle != NULL;
56b6aeb0 720
fe08bc4b 721 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
d8fd94d9 722 str_supported(tp_features.hotkey));
fe08bc4b 723
d8fd94d9 724 if (tp_features.hotkey) {
56b6aeb0
HMH		 725 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
726 A30, R30, R31, T20-22, X20-21, X22-24 */
d8fd94d9
HMH		 727 tp_features.hotkey_mask =
728 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
56b6aeb0 729
fe08bc4b 730 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
d8fd94d9 731 str_supported(tp_features.hotkey_mask));
fe08bc4b 732
b86c4722
HMH		 733 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
734 if (res)
735 return res;
56b6aeb0
HMH		 736 }
737
d8fd94d9 738 return (tp_features.hotkey)? 0 : 1;
56b6aeb0
HMH		 739}
740
741static void hotkey_exit(void)
742{
b86c4722
HMH		 743 int res;
744
d8fd94d9 745 if (tp_features.hotkey) {
fe08bc4b 746 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
b86c4722
HMH		 747 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
748 if (res)
749 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
5fba344c 750 }
56b6aeb0
HMH		 751}
752
753static void hotkey_notify(struct ibm_struct *ibm, u32 event)
754{
755 int hkey;
756
757 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
8d376cd6 758 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
56b6aeb0
HMH		 759 else {
760 printk(IBM_ERR "unknown hotkey event %d\n", event);
8d376cd6 761 acpi_bus_generate_event(ibm->acpi->device, event, 0);
56b6aeb0
HMH		 762 }
763}
764
40ca9fdf
HMH		 765/*
766 * Call with hotkey_mutex held
767 */
78f81cc4 768static int hotkey_get(int *status, int *mask)
1da177e4
LT		 769{
770 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
b86c4722 771 return -EIO;
78f81cc4 772
d8fd94d9 773 if (tp_features.hotkey_mask)
78f81cc4 774 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
b86c4722 775 return -EIO;
78f81cc4 776
b86c4722 777 return 0;
1da177e4
LT		 778}
779
40ca9fdf
HMH		 780/*
781 * Call with hotkey_mutex held
782 */
78f81cc4 783static int hotkey_set(int status, int mask)
1da177e4
LT		 784{
785 int i;
786
787 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
b86c4722 788 return -EIO;
1da177e4 789
d8fd94d9 790 if (tp_features.hotkey_mask)
78f81cc4
BD		 791 for (i = 0; i < 32; i++) {
792 int bit = ((1 << i) & mask) != 0;
793 if (!acpi_evalf(hkey_handle,
794 NULL, "MHKM", "vdd", i + 1, bit))
b86c4722 795 return -EIO;
78f81cc4 796 }
1da177e4 797
b86c4722 798 return 0;
1da177e4
LT		 799}
800
78f81cc4 801static int hotkey_read(char *p)
1da177e4 802{
b86c4722 803 int res, status, mask;
1da177e4
LT		 804 int len = 0;
805
d8fd94d9 806 if (!tp_features.hotkey) {
78f81cc4
BD		 807 len += sprintf(p + len, "status:\t\tnot supported\n");
808 return len;
809 }
810
40ca9fdf
HMH		 811 res = mutex_lock_interruptible(&hotkey_mutex);
812 if (res < 0)
813 return res;
b86c4722 814 res = hotkey_get(&status, &mask);
40ca9fdf 815 mutex_unlock(&hotkey_mutex);
b86c4722
HMH		 816 if (res)
817 return res;
1da177e4
LT		 818
819 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
d8fd94d9 820 if (tp_features.hotkey_mask) {
1da177e4
LT		 821 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
822 len += sprintf(p + len,
823 "commands:\tenable, disable, reset, <mask>\n");
824 } else {
825 len += sprintf(p + len, "mask:\t\tnot supported\n");
826 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
827 }
828
829 return len;
830}
831
78f81cc4 832static int hotkey_write(char *buf)
1da177e4 833{
b86c4722 834 int res, status, mask;
1da177e4
LT		 835 char *cmd;
836 int do_cmd = 0;
837
d8fd94d9 838 if (!tp_features.hotkey)
1da177e4
LT		 839 return -ENODEV;
840
40ca9fdf
HMH		 841 res = mutex_lock_interruptible(&hotkey_mutex);
842 if (res < 0)
843 return res;
844
b86c4722
HMH		 845 res = hotkey_get(&status, &mask);
846 if (res)
40ca9fdf 847 goto errexit;
78f81cc4 848
40ca9fdf 849 res = 0;
1da177e4
LT		 850 while ((cmd = next_cmd(&buf))) {
851 if (strlencmp(cmd, "enable") == 0) {
852 status = 1;
853 } else if (strlencmp(cmd, "disable") == 0) {
854 status = 0;
855 } else if (strlencmp(cmd, "reset") == 0) {
78f81cc4
BD		 856 status = hotkey_orig_status;
857 mask = hotkey_orig_mask;
1da177e4
LT		 858 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
859 /* mask set */
860 } else if (sscanf(cmd, "%x", &mask) == 1) {
861 /* mask set */
40ca9fdf
HMH		 862 } else {
863 res = -EINVAL;
864 goto errexit;
865 }
1da177e4
LT		 866 do_cmd = 1;
867 }
868
40ca9fdf 869 if (do_cmd)
b86c4722 870 res = hotkey_set(status, mask);
1da177e4 871
40ca9fdf
HMH		 872errexit:
873 mutex_unlock(&hotkey_mutex);
874 return res;
78f81cc4 875}
1da177e4 876
8d376cd6
HMH		 877static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
878 .hid = IBM_HKEY_HID,
879 .notify = hotkey_notify,
880 .handle = &hkey_handle,
881 .type = ACPI_DEVICE_NOTIFY,
882};
883
a5763f22
HMH		 884static struct ibm_struct hotkey_driver_data = {
885 .name = "hotkey",
a5763f22
HMH		 886 .read = hotkey_read,
887 .write = hotkey_write,
888 .exit = hotkey_exit,
8d376cd6 889 .acpi = &ibm_hotkey_acpidriver,
a5763f22
HMH		 890};
891
56b6aeb0
HMH		 892/*************************************************************************
893 * Bluetooth subdriver
894 */
1da177e4 895
a5763f22 896static int __init bluetooth_init(struct ibm_init_struct *iibm)
1da177e4 897{
d6fdd1e9
HMH		 898 int status = 0;
899
fe08bc4b
HMH		 900 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
901
8d376cd6 902 IBM_ACPIHANDLE_INIT(hkey);
5fba344c 903
78f81cc4
BD		 904 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
905 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
d8fd94d9 906 tp_features.bluetooth = hkey_handle &&
d6fdd1e9
HMH		 907 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
908
909 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
910 str_supported(tp_features.bluetooth),
911 status);
912
913 if (tp_features.bluetooth &&
914 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
915 /* no bluetooth hardware present in system */
916 tp_features.bluetooth = 0;
917 dbg_printk(TPACPI_DBG_INIT,
918 "bluetooth hardware not installed\n");
919 }
fe08bc4b 920
d8fd94d9 921 return (tp_features.bluetooth)? 0 : 1;
1da177e4
LT		 922}
923
d6fdd1e9 924static int bluetooth_get_radiosw(void)
1da177e4
LT		 925{
926 int status;
927
d6fdd1e9
HMH		 928 if (!tp_features.bluetooth)
929 return -ENODEV;
1da177e4 930
d6fdd1e9
HMH		 931 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
932 return -EIO;
933
934 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
935}
936
937static int bluetooth_set_radiosw(int radio_on)
938{
939 int status;
940
941 if (!tp_features.bluetooth)
942 return -ENODEV;
943
944 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
945 return -EIO;
946 if (radio_on)
947 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
948 else
949 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
950 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
951 return -EIO;
952
953 return 0;
1da177e4
LT		 954}
955
78f81cc4 956static int bluetooth_read(char *p)
1da177e4
LT		 957{
958 int len = 0;
d6fdd1e9 959 int status = bluetooth_get_radiosw();
1da177e4 960
d8fd94d9 961 if (!tp_features.bluetooth)
1da177e4 962 len += sprintf(p + len, "status:\t\tnot supported\n");
1da177e4 963 else {
d6fdd1e9
HMH		 964 len += sprintf(p + len, "status:\t\t%s\n",
965 (status)? "enabled" : "disabled");
1da177e4
LT		 966 len += sprintf(p + len, "commands:\tenable, disable\n");
967 }
968
969 return len;
970}
971
78f81cc4 972static int bluetooth_write(char *buf)
1da177e4 973{
1da177e4 974 char *cmd;
1da177e4 975
d8fd94d9 976 if (!tp_features.bluetooth)
78f81cc4 977 return -ENODEV;
1da177e4
LT		 978
979 while ((cmd = next_cmd(&buf))) {
980 if (strlencmp(cmd, "enable") == 0) {
d6fdd1e9 981 bluetooth_set_radiosw(1);
1da177e4 982 } else if (strlencmp(cmd, "disable") == 0) {
d6fdd1e9 983 bluetooth_set_radiosw(0);
1da177e4
LT		 984 } else
985 return -EINVAL;
1da177e4
LT		 986 }
987
1da177e4
LT		 988 return 0;
989}
990
a5763f22
HMH		 991static struct ibm_struct bluetooth_driver_data = {
992 .name = "bluetooth",
993 .read = bluetooth_read,
994 .write = bluetooth_write,
995};
996
56b6aeb0
HMH		 997/*************************************************************************
998 * Wan subdriver
999 */
1000
a5763f22 1001static int __init wan_init(struct ibm_init_struct *iibm)
42adb53c 1002{
d6fdd1e9
HMH		 1003 int status = 0;
1004
fe08bc4b
HMH		 1005 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1006
8d376cd6 1007 IBM_ACPIHANDLE_INIT(hkey);
5fba344c 1008
d8fd94d9 1009 tp_features.wan = hkey_handle &&
d6fdd1e9
HMH		 1010 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1011
1012 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1013 str_supported(tp_features.wan),
1014 status);
1015
1016 if (tp_features.wan &&
1017 !(status & TP_ACPI_WANCARD_HWPRESENT)) {
1018 /* no wan hardware present in system */
1019 tp_features.wan = 0;
1020 dbg_printk(TPACPI_DBG_INIT,
1021 "wan hardware not installed\n");
1022 }
fe08bc4b 1023
d8fd94d9 1024 return (tp_features.wan)? 0 : 1;
42adb53c
JF		 1025}
1026
d6fdd1e9 1027static int wan_get_radiosw(void)
42adb53c
JF		 1028{
1029 int status;
1030
d6fdd1e9
HMH		 1031 if (!tp_features.wan)
1032 return -ENODEV;
42adb53c 1033
d6fdd1e9
HMH		 1034 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1035 return -EIO;
1036
1037 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1038}
1039
1040static int wan_set_radiosw(int radio_on)
1041{
1042 int status;
1043
1044 if (!tp_features.wan)
1045 return -ENODEV;
1046
1047 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1048 return -EIO;
1049 if (radio_on)
1050 status |= TP_ACPI_WANCARD_RADIOSSW;
1051 else
1052 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1053 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1054 return -EIO;
1055
1056 return 0;
42adb53c
JF		 1057}
1058
1059static int wan_read(char *p)
1060{
1061 int len = 0;
d6fdd1e9 1062 int status = wan_get_radiosw();
42adb53c 1063
d8fd94d9 1064 if (!tp_features.wan)
42adb53c 1065 len += sprintf(p + len, "status:\t\tnot supported\n");
42adb53c 1066 else {
d6fdd1e9
HMH		 1067 len += sprintf(p + len, "status:\t\t%s\n",
1068 (status)? "enabled" : "disabled");
42adb53c
JF		 1069 len += sprintf(p + len, "commands:\tenable, disable\n");
1070 }
1071
1072 return len;
1073}
1074
1075static int wan_write(char *buf)
1076{
42adb53c 1077 char *cmd;
42adb53c 1078
d8fd94d9 1079 if (!tp_features.wan)
42adb53c
JF		 1080 return -ENODEV;
1081
1082 while ((cmd = next_cmd(&buf))) {
1083 if (strlencmp(cmd, "enable") == 0) {
d6fdd1e9 1084 wan_set_radiosw(1);
42adb53c 1085 } else if (strlencmp(cmd, "disable") == 0) {
d6fdd1e9 1086 wan_set_radiosw(0);
42adb53c
JF		 1087 } else
1088 return -EINVAL;
42adb53c
JF		 1089 }
1090
42adb53c
JF		 1091 return 0;
1092}
1093
a5763f22
HMH		 1094static struct ibm_struct wan_driver_data = {
1095 .name = "wan",
1096 .read = wan_read,
1097 .write = wan_write,
92641177 1098 .flags.experimental = 1,
a5763f22
HMH		 1099};
1100
56b6aeb0
HMH		 1101/*************************************************************************
1102 * Video subdriver
1103 */
1104
9a8e1738
HMH		 1105static enum video_access_mode video_supported;
1106static int video_orig_autosw;
78f81cc4 1107
56b6aeb0
HMH		 1108IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1109 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1110 "\\_SB.PCI0.VID0", /* 770e */
1111 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1112 "\\_SB.PCI0.AGP.VID", /* all others */
1113 ); /* R30, R31 */
1114
1115IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1116
a5763f22 1117static int __init video_init(struct ibm_init_struct *iibm)
1da177e4 1118{
78f81cc4
BD		 1119 int ivga;
1120
fe08bc4b
HMH		 1121 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1122
8d376cd6
HMH		 1123 IBM_ACPIHANDLE_INIT(vid);
1124 IBM_ACPIHANDLE_INIT(vid2);
5fba344c 1125
78f81cc4
BD		 1126 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1127 /* G41, assume IVGA doesn't change */
1128 vid_handle = vid2_handle;
1129
1130 if (!vid_handle)
1131 /* video switching not supported on R30, R31 */
efa27145 1132 video_supported = TPACPI_VIDEO_NONE;
78f81cc4
BD		 1133 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1134 /* 570 */
efa27145 1135 video_supported = TPACPI_VIDEO_570;
78f81cc4
BD		 1136 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1137 /* 600e/x, 770e, 770x */
efa27145 1138 video_supported = TPACPI_VIDEO_770;
78f81cc4
BD		 1139 else
1140 /* all others */
efa27145 1141 video_supported = TPACPI_VIDEO_NEW;
1da177e4 1142
fe08bc4b
HMH		 1143 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1144 str_supported(video_supported != TPACPI_VIDEO_NONE),
1145 video_supported);
1146
5fba344c 1147 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1da177e4
LT		 1148}
1149
56b6aeb0
HMH		 1150static void video_exit(void)
1151{
83f34724
HMH		 1152 dbg_printk(TPACPI_DBG_EXIT,
1153 "restoring original video autoswitch mode\n");
1154 if (video_autosw_set(video_orig_autosw))
1155 printk(IBM_ERR "error while trying to restore original "
1156 "video autoswitch mode\n");
56b6aeb0
HMH		 1157}
1158
83f34724 1159static int video_outputsw_get(void)
1da177e4
LT		 1160{
1161 int status = 0;
1162 int i;
1163
83f34724
HMH		 1164 switch (video_supported) {
1165 case TPACPI_VIDEO_570:
1166 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1167 TP_ACPI_VIDEO_570_PHSCMD))
1168 return -EIO;
1169 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1170 break;
1171 case TPACPI_VIDEO_770:
1172 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1173 return -EIO;
1174 if (i)
1175 status |= TP_ACPI_VIDEO_S_LCD;
1176 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1177 return -EIO;
1178 if (i)
1179 status |= TP_ACPI_VIDEO_S_CRT;
1180 break;
1181 case TPACPI_VIDEO_NEW:
1182 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1183 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1184 return -EIO;
1185 if (i)
1186 status |= TP_ACPI_VIDEO_S_CRT;
1187
1188 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1189 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1190 return -EIO;
1191 if (i)
1192 status |= TP_ACPI_VIDEO_S_LCD;
1193 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1194 return -EIO;
1195 if (i)
1196 status |= TP_ACPI_VIDEO_S_DVI;
1197 break;
1198 default:
1199 return -ENOSYS;
78f81cc4
BD		 1200 }
1201
1202 return status;
1203}
1da177e4 1204
83f34724 1205static int video_outputsw_set(int status)
78f81cc4 1206{
83f34724
HMH		 1207 int autosw;
1208 int res = 0;
1209
1210 switch (video_supported) {
1211 case TPACPI_VIDEO_570:
1212 res = acpi_evalf(NULL, NULL,
1213 "\\_SB.PHS2", "vdd",
1214 TP_ACPI_VIDEO_570_PHS2CMD,
1215 status | TP_ACPI_VIDEO_570_PHS2SET);
1216 break;
1217 case TPACPI_VIDEO_770:
1218 autosw = video_autosw_get();
1219 if (autosw < 0)
1220 return autosw;
1da177e4 1221
83f34724
HMH		 1222 res = video_autosw_set(1);
1223 if (res)
1224 return res;
1225 res = acpi_evalf(vid_handle, NULL,
1226 "ASWT", "vdd", status * 0x100, 0);
1227 if (!autosw && video_autosw_set(autosw)) {
1228 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1229 return -EIO;
1230 }
1231 break;
1232 case TPACPI_VIDEO_NEW:
1233 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1234 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1235 break;
1236 default:
1237 return -ENOSYS;
1238 }
1da177e4 1239
83f34724 1240 return (res)? 0 : -EIO;
1da177e4
LT		 1241}
1242
83f34724 1243static int video_autosw_get(void)
78f81cc4 1244{
83f34724 1245 int autosw = 0;
78f81cc4 1246
83f34724
HMH		 1247 switch (video_supported) {
1248 case TPACPI_VIDEO_570:
1249 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1250 return -EIO;
1251 break;
1252 case TPACPI_VIDEO_770:
1253 case TPACPI_VIDEO_NEW:
1254 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1255 return -EIO;
1256 break;
1257 default:
1258 return -ENOSYS;
1259 }
78f81cc4 1260
83f34724 1261 return autosw & 1;
78f81cc4
BD		 1262}
1263
83f34724 1264static int video_autosw_set(int enable)
78f81cc4 1265{
83f34724
HMH		 1266 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1267 return -EIO;
1268 return 0;
78f81cc4
BD		 1269}
1270
83f34724 1271static int video_outputsw_cycle(void)
78f81cc4 1272{
83f34724
HMH		 1273 int autosw = video_autosw_get();
1274 int res;
78f81cc4 1275
83f34724
HMH		 1276 if (autosw < 0)
1277 return autosw;
78f81cc4 1278
83f34724
HMH		 1279 switch (video_supported) {
1280 case TPACPI_VIDEO_570:
1281 res = video_autosw_set(1);
1282 if (res)
1283 return res;
1284 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1285 break;
1286 case TPACPI_VIDEO_770:
1287 case TPACPI_VIDEO_NEW:
1288 res = video_autosw_set(1);
1289 if (res)
1290 return res;
1291 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1292 break;
1293 default:
1294 return -ENOSYS;
1295 }
1296 if (!autosw && video_autosw_set(autosw)) {
1297 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1298 return -EIO;
78f81cc4
BD		 1299 }
1300
83f34724
HMH		 1301 return (res)? 0 : -EIO;
1302}
1303
1304static int video_expand_toggle(void)
1305{
1306 switch (video_supported) {
1307 case TPACPI_VIDEO_570:
1308 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1309 0 : -EIO;
1310 case TPACPI_VIDEO_770:
1311 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1312 0 : -EIO;
1313 case TPACPI_VIDEO_NEW:
1314 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1315 0 : -EIO;
1316 default:
1317 return -ENOSYS;
1318 }
1319 /* not reached */
78f81cc4
BD		 1320}
1321
56b6aeb0
HMH		 1322static int video_read(char *p)
1323{
83f34724 1324 int status, autosw;
56b6aeb0
HMH		 1325 int len = 0;
1326
83f34724 1327 if (video_supported == TPACPI_VIDEO_NONE) {
56b6aeb0
HMH		 1328 len += sprintf(p + len, "status:\t\tnot supported\n");
1329 return len;
1330 }
1331
83f34724
HMH		 1332 status = video_outputsw_get();
1333 if (status < 0)
1334 return status;
1335
1336 autosw = video_autosw_get();
1337 if (autosw < 0)
1338 return autosw;
1339
56b6aeb0
HMH		 1340 len += sprintf(p + len, "status:\t\tsupported\n");
1341 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1342 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
efa27145 1343 if (video_supported == TPACPI_VIDEO_NEW)
56b6aeb0
HMH		 1344 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1345 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1346 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1347 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
efa27145 1348 if (video_supported == TPACPI_VIDEO_NEW)
56b6aeb0
HMH		 1349 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1350 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1351 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1352
1353 return len;
1354}
1355
78f81cc4 1356static int video_write(char *buf)
1da177e4
LT		 1357{
1358 char *cmd;
1359 int enable, disable, status;
83f34724 1360 int res;
1da177e4 1361
83f34724 1362 if (video_supported == TPACPI_VIDEO_NONE)
78f81cc4
BD		 1363 return -ENODEV;
1364
83f34724
HMH		 1365 enable = 0;
1366 disable = 0;
1da177e4
LT		 1367
1368 while ((cmd = next_cmd(&buf))) {
1369 if (strlencmp(cmd, "lcd_enable") == 0) {
83f34724 1370 enable |= TP_ACPI_VIDEO_S_LCD;
1da177e4 1371 } else if (strlencmp(cmd, "lcd_disable") == 0) {
83f34724 1372 disable |= TP_ACPI_VIDEO_S_LCD;
1da177e4 1373 } else if (strlencmp(cmd, "crt_enable") == 0) {
83f34724 1374 enable |= TP_ACPI_VIDEO_S_CRT;
1da177e4 1375 } else if (strlencmp(cmd, "crt_disable") == 0) {
83f34724 1376 disable |= TP_ACPI_VIDEO_S_CRT;
efa27145 1377 } else if (video_supported == TPACPI_VIDEO_NEW &&
78f81cc4 1378 strlencmp(cmd, "dvi_enable") == 0) {
83f34724 1379 enable |= TP_ACPI_VIDEO_S_DVI;
efa27145 1380 } else if (video_supported == TPACPI_VIDEO_NEW &&
78f81cc4 1381 strlencmp(cmd, "dvi_disable") == 0) {
83f34724 1382 disable |= TP_ACPI_VIDEO_S_DVI;
1da177e4 1383 } else if (strlencmp(cmd, "auto_enable") == 0) {
83f34724
HMH		 1384 res = video_autosw_set(1);
1385 if (res)
1386 return res;
1da177e4 1387 } else if (strlencmp(cmd, "auto_disable") == 0) {
83f34724
HMH		 1388 res = video_autosw_set(0);
1389 if (res)
1390 return res;
1da177e4 1391 } else if (strlencmp(cmd, "video_switch") == 0) {
83f34724
HMH		 1392 res = video_outputsw_cycle();
1393 if (res)
1394 return res;
1da177e4 1395 } else if (strlencmp(cmd, "expand_toggle") == 0) {
83f34724
HMH		 1396 res = video_expand_toggle();
1397 if (res)
1398 return res;
1da177e4
LT		 1399 } else
1400 return -EINVAL;
1401 }
1402
1403 if (enable || disable) {
83f34724
HMH		 1404 status = video_outputsw_get();
1405 if (status < 0)
1406 return status;
1407 res = video_outputsw_set((status & ~disable) | enable);
1408 if (res)
1409 return res;
1da177e4
LT		 1410 }
1411
1412 return 0;
1413}
1414
a5763f22
HMH		 1415static struct ibm_struct video_driver_data = {
1416 .name = "video",
1417 .read = video_read,
1418 .write = video_write,
1419 .exit = video_exit,
1420};
1421
56b6aeb0
HMH		 1422/*************************************************************************
1423 * Light (thinklight) subdriver
1424 */
1da177e4 1425
56b6aeb0
HMH		 1426IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1427IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1428
a5763f22 1429static int __init light_init(struct ibm_init_struct *iibm)
1da177e4 1430{
fe08bc4b
HMH		 1431 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1432
8d376cd6
HMH		 1433 IBM_ACPIHANDLE_INIT(ledb);
1434 IBM_ACPIHANDLE_INIT(lght);
1435 IBM_ACPIHANDLE_INIT(cmos);
5fba344c 1436
78f81cc4 1437 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
d8fd94d9 1438 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
78f81cc4 1439
d8fd94d9 1440 if (tp_features.light)
78f81cc4
BD		 1441 /* light status not supported on
1442 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
d8fd94d9
HMH		 1443 tp_features.light_status =
1444 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1da177e4 1445
fe08bc4b 1446 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
d8fd94d9 1447 str_supported(tp_features.light));
fe08bc4b 1448
d8fd94d9 1449 return (tp_features.light)? 0 : 1;
1da177e4
LT		 1450}
1451
78f81cc4 1452static int light_read(char *p)
1da177e4
LT		 1453{
1454 int len = 0;
1455 int status = 0;
1456
d8fd94d9 1457 if (!tp_features.light) {
78f81cc4 1458 len += sprintf(p + len, "status:\t\tnot supported\n");
d8fd94d9 1459 } else if (!tp_features.light_status) {
78f81cc4
BD		 1460 len += sprintf(p + len, "status:\t\tunknown\n");
1461 len += sprintf(p + len, "commands:\ton, off\n");
1462 } else {
1da177e4
LT		 1463 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1464 return -EIO;
1465 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
78f81cc4
BD		 1466 len += sprintf(p + len, "commands:\ton, off\n");
1467 }
1da177e4
LT		 1468
1469 return len;
1470}
1471
78f81cc4 1472static int light_write(char *buf)
1da177e4
LT		 1473{
1474 int cmos_cmd, lght_cmd;
1475 char *cmd;
1476 int success;
78f81cc4 1477
d8fd94d9 1478 if (!tp_features.light)
78f81cc4
BD		 1479 return -ENODEV;
1480
1da177e4
LT		 1481 while ((cmd = next_cmd(&buf))) {
1482 if (strlencmp(cmd, "on") == 0) {
1483 cmos_cmd = 0x0c;
1484 lght_cmd = 1;
1485 } else if (strlencmp(cmd, "off") == 0) {
1486 cmos_cmd = 0x0d;
1487 lght_cmd = 0;
1488 } else
1489 return -EINVAL;
78f81cc4 1490
1da177e4 1491 success = cmos_handle ?
78f81cc4
BD		 1492 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1493 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1da177e4
LT		 1494 if (!success)
1495 return -EIO;
1496 }
1497
1498 return 0;
1499}
1500
a5763f22
HMH		 1501static struct ibm_struct light_driver_data = {
1502 .name = "light",
1503 .read = light_read,
1504 .write = light_write,
1505};
1506
56b6aeb0
HMH		 1507/*************************************************************************
1508 * Dock subdriver
1509 */
1da177e4 1510
85998248 1511#ifdef CONFIG_THINKPAD_ACPI_DOCK
56b6aeb0
HMH		 1512
1513IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
1514 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1515 "\\_SB.PCI0.PCI1.DOCK", /* all others */
1516 "\\_SB.PCI.ISA.SLCE", /* 570 */
1517 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1518
5fba344c
HMH		 1519/* don't list other alternatives as we install a notify handler on the 570 */
1520IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
1521
d94a7f16
HMH		 1522static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1523 {
1524 .notify = dock_notify,
1525 .handle = &dock_handle,
1526 .type = ACPI_SYSTEM_NOTIFY,
1527 },
1528 {
1529 .hid = IBM_PCI_HID,
1530 .notify = dock_notify,
1531 .handle = &pci_handle,
1532 .type = ACPI_SYSTEM_NOTIFY,
1533 },
1534};
1535
1536static struct ibm_struct dock_driver_data[2] = {
1537 {
1538 .name = "dock",
1539 .read = dock_read,
1540 .write = dock_write,
1541 .acpi = &ibm_dock_acpidriver[0],
1542 },
1543 {
1544 .name = "dock",
1545 .acpi = &ibm_dock_acpidriver[1],
1546 },
1547};
1548
1da177e4
LT		 1549#define dock_docked() (_sta(dock_handle) & 1)
1550
a5763f22 1551static int __init dock_init(struct ibm_init_struct *iibm)
5fba344c 1552{
fe08bc4b
HMH		 1553 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1554
8d376cd6 1555 IBM_ACPIHANDLE_INIT(dock);
5fba344c 1556
fe08bc4b
HMH		 1557 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1558 str_supported(dock_handle != NULL));
1559
5fba344c
HMH		 1560 return (dock_handle)? 0 : 1;
1561}
1562
d94a7f16
HMH		 1563static int __init dock_init2(struct ibm_init_struct *iibm)
1564{
1565 int dock2_needed;
1566
1567 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
1568
1569 if (dock_driver_data[0].flags.acpi_driver_registered &&
1570 dock_driver_data[0].flags.acpi_notify_installed) {
1571 IBM_ACPIHANDLE_INIT(pci);
1572 dock2_needed = (pci_handle != NULL);
1573 vdbg_printk(TPACPI_DBG_INIT,
1574 "dock PCI handler for the TP 570 is %s\n",
1575 str_supported(dock2_needed));
1576 } else {
1577 vdbg_printk(TPACPI_DBG_INIT,
1578 "dock subdriver part 2 not required\n");
1579 dock2_needed = 0;
1580 }
1581
1582 return (dock2_needed)? 0 : 1;
1583}
1584
56b6aeb0
HMH		 1585static void dock_notify(struct ibm_struct *ibm, u32 event)
1586{
1587 int docked = dock_docked();
8d376cd6 1588 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
56b6aeb0
HMH		 1589
1590 if (event == 1 && !pci) /* 570 */
8d376cd6 1591 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
56b6aeb0 1592 else if (event == 1 && pci) /* 570 */
8d376cd6 1593 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
56b6aeb0 1594 else if (event == 3 && docked)
8d376cd6 1595 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
56b6aeb0 1596 else if (event == 3 && !docked)
8d376cd6 1597 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
56b6aeb0 1598 else if (event == 0 && docked)
8d376cd6 1599 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
56b6aeb0
HMH		 1600 else {
1601 printk(IBM_ERR "unknown dock event %d, status %d\n",
1602 event, _sta(dock_handle));
8d376cd6 1603 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
56b6aeb0
HMH		 1604 }
1605}
1606
78f81cc4 1607static int dock_read(char *p)
1da177e4
LT		 1608{
1609 int len = 0;
1610 int docked = dock_docked();
1611
1612 if (!dock_handle)
1613 len += sprintf(p + len, "status:\t\tnot supported\n");
1614 else if (!docked)
1615 len += sprintf(p + len, "status:\t\tundocked\n");
1616 else {
1617 len += sprintf(p + len, "status:\t\tdocked\n");
1618 len += sprintf(p + len, "commands:\tdock, undock\n");
1619 }
1620
1621 return len;
1622}
1623
78f81cc4 1624static int dock_write(char *buf)
1da177e4
LT		 1625{
1626 char *cmd;
1627
1628 if (!dock_docked())
78f81cc4 1629 return -ENODEV;
1da177e4
LT		 1630
1631 while ((cmd = next_cmd(&buf))) {
1632 if (strlencmp(cmd, "undock") == 0) {
78f81cc4
BD		 1633 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1634 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
56b6aeb0
HMH		 1635 return -EIO;
1636 } else if (strlencmp(cmd, "dock") == 0) {
1637 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1638 return -EIO;
1639 } else
1640 return -EINVAL;
1da177e4 1641 }
56b6aeb0
HMH		 1642
1643 return 0;
1da177e4 1644}
56b6aeb0 1645
85998248 1646#endif /* CONFIG_THINKPAD_ACPI_DOCK */
56b6aeb0
HMH		 1647
1648/*************************************************************************
1649 * Bay subdriver
1650 */
1da177e4 1651
85998248 1652#ifdef CONFIG_THINKPAD_ACPI_BAY
56b6aeb0
HMH		 1653IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
1654 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1655 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1656 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1657 ); /* A21e, R30, R31 */
1658IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1659 "_EJ0", /* all others */
1660 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1661IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
1662 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1663 ); /* all others */
1664IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
1665 "_EJ0", /* 770x */
1666 ); /* all others */
1667
a5763f22 1668static int __init bay_init(struct ibm_init_struct *iibm)
1da177e4 1669{
fe08bc4b
HMH		 1670 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1671
8d376cd6 1672 IBM_ACPIHANDLE_INIT(bay);
5fba344c 1673 if (bay_handle)
8d376cd6
HMH		 1674 IBM_ACPIHANDLE_INIT(bay_ej);
1675 IBM_ACPIHANDLE_INIT(bay2);
5fba344c 1676 if (bay2_handle)
8d376cd6 1677 IBM_ACPIHANDLE_INIT(bay2_ej);
5fba344c 1678
d8fd94d9
HMH		 1679 tp_features.bay_status = bay_handle &&
1680 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1681 tp_features.bay_status2 = bay2_handle &&
1682 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
78f81cc4 1683
d8fd94d9
HMH		 1684 tp_features.bay_eject = bay_handle && bay_ej_handle &&
1685 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1686 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1687 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1da177e4 1688
fe08bc4b
HMH		 1689 vdbg_printk(TPACPI_DBG_INIT,
1690 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
d8fd94d9
HMH		 1691 str_supported(tp_features.bay_status),
1692 str_supported(tp_features.bay_eject),
1693 str_supported(tp_features.bay_status2),
1694 str_supported(tp_features.bay_eject2));
fe08bc4b 1695
d8fd94d9
HMH		 1696 return (tp_features.bay_status || tp_features.bay_eject ||
1697 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1da177e4
LT		 1698}
1699
56b6aeb0
HMH		 1700static void bay_notify(struct ibm_struct *ibm, u32 event)
1701{
8d376cd6 1702 acpi_bus_generate_event(ibm->acpi->device, event, 0);
56b6aeb0
HMH		 1703}
1704
78f81cc4
BD		 1705#define bay_occupied(b) (_sta(b##_handle) & 1)
1706
1707static int bay_read(char *p)
1da177e4
LT		 1708{
1709 int len = 0;
78f81cc4
BD		 1710 int occupied = bay_occupied(bay);
1711 int occupied2 = bay_occupied(bay2);
1712 int eject, eject2;
1713
d8fd94d9
HMH		 1714 len += sprintf(p + len, "status:\t\t%s\n",
1715 tp_features.bay_status ?
1716 (occupied ? "occupied" : "unoccupied") :
1717 "not supported");
1718 if (tp_features.bay_status2)
78f81cc4
BD		 1719 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1720 "occupied" : "unoccupied");
1721
d8fd94d9
HMH		 1722 eject = tp_features.bay_eject && occupied;
1723 eject2 = tp_features.bay_eject2 && occupied2;
78f81cc4
BD		 1724
1725 if (eject && eject2)
1726 len += sprintf(p + len, "commands:\teject, eject2\n");
1727 else if (eject)
1da177e4 1728 len += sprintf(p + len, "commands:\teject\n");
78f81cc4
BD		 1729 else if (eject2)
1730 len += sprintf(p + len, "commands:\teject2\n");
1da177e4
LT		 1731
1732 return len;
1733}
1734
78f81cc4 1735static int bay_write(char *buf)
1da177e4
LT		 1736{
1737 char *cmd;
1738
d8fd94d9 1739 if (!tp_features.bay_eject && !tp_features.bay_eject2)
78f81cc4
BD		 1740 return -ENODEV;
1741
1da177e4 1742 while ((cmd = next_cmd(&buf))) {
d8fd94d9 1743 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
78f81cc4
BD		 1744 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1745 return -EIO;
d8fd94d9 1746 } else if (tp_features.bay_eject2 &&
78f81cc4
BD		 1747 strlencmp(cmd, "eject2") == 0) {
1748 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1da177e4
LT		 1749 return -EIO;
1750 } else
1751 return -EINVAL;
1752 }
1753
1754 return 0;
78f81cc4 1755}
a5763f22 1756
8d376cd6
HMH		 1757static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
1758 .notify = bay_notify,
1759 .handle = &bay_handle,
1760 .type = ACPI_SYSTEM_NOTIFY,
1761};
1762
a5763f22
HMH		 1763static struct ibm_struct bay_driver_data = {
1764 .name = "bay",
1765 .read = bay_read,
1766 .write = bay_write,
8d376cd6 1767 .acpi = &ibm_bay_acpidriver,
a5763f22
HMH		 1768};
1769
85998248 1770#endif /* CONFIG_THINKPAD_ACPI_BAY */
1da177e4 1771
56b6aeb0
HMH		 1772/*************************************************************************
1773 * CMOS subdriver
1774 */
1775
b616004c
HMH		 1776/* sysfs cmos_command -------------------------------------------------- */
1777static ssize_t cmos_command_store(struct device *dev,
1778 struct device_attribute *attr,
1779 const char *buf, size_t count)
1780{
1781 unsigned long cmos_cmd;
1782 int res;
1783
1784 if (parse_strtoul(buf, 21, &cmos_cmd))
1785 return -EINVAL;
1786
1787 res = issue_thinkpad_cmos_command(cmos_cmd);
1788 return (res)? res : count;
1789}
1790
1791static struct device_attribute dev_attr_cmos_command =
1792 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
1793
1794/* --------------------------------------------------------------------- */
1795
a5763f22 1796static int __init cmos_init(struct ibm_init_struct *iibm)
5fba344c 1797{
b616004c
HMH		 1798 int res;
1799
fe08bc4b
HMH		 1800 vdbg_printk(TPACPI_DBG_INIT,
1801 "initializing cmos commands subdriver\n");
1802
8d376cd6 1803 IBM_ACPIHANDLE_INIT(cmos);
5fba344c 1804
fe08bc4b
HMH		 1805 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1806 str_supported(cmos_handle != NULL));
b616004c
HMH		 1807
1808 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
1809 if (res)
1810 return res;
1811
5fba344c
HMH		 1812 return (cmos_handle)? 0 : 1;
1813}
1814
b616004c
HMH		 1815static void cmos_exit(void)
1816{
1817 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
1818}
1819
78f81cc4 1820static int cmos_read(char *p)
1da177e4
LT		 1821{
1822 int len = 0;
1823
78f81cc4
BD		 1824 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1825 R30, R31, T20-22, X20-21 */
1da177e4
LT		 1826 if (!cmos_handle)
1827 len += sprintf(p + len, "status:\t\tnot supported\n");
1828 else {
1829 len += sprintf(p + len, "status:\t\tsupported\n");
78f81cc4 1830 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1da177e4
LT		 1831 }
1832
1833 return len;
1834}
1835
78f81cc4 1836static int cmos_write(char *buf)
1da177e4
LT		 1837{
1838 char *cmd;
c9bea99c 1839 int cmos_cmd, res;
1da177e4
LT		 1840
1841 while ((cmd = next_cmd(&buf))) {
78f81cc4
BD		 1842 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1843 cmos_cmd >= 0 && cmos_cmd <= 21) {
1da177e4
LT		 1844 /* cmos_cmd set */
1845 } else
1846 return -EINVAL;
1847
c9bea99c
HMH		 1848 res = issue_thinkpad_cmos_command(cmos_cmd);
1849 if (res)
1850 return res;
1da177e4
LT		 1851 }
1852
1853 return 0;
78f81cc4
BD		 1854}
1855
a5763f22
HMH		 1856static struct ibm_struct cmos_driver_data = {
1857 .name = "cmos",
1858 .read = cmos_read,
1859 .write = cmos_write,
b616004c 1860 .exit = cmos_exit,
a5763f22 1861};
56b6aeb0
HMH		 1862
1863/*************************************************************************
1864 * LED subdriver
1865 */
1866
9a8e1738 1867static enum led_access_mode led_supported;
78f81cc4 1868
56b6aeb0
HMH		 1869IBM_HANDLE(led, ec, "SLED", /* 570 */
1870 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1871 "LED", /* all others */
1872 ); /* R30, R31 */
1873
a5763f22 1874static int __init led_init(struct ibm_init_struct *iibm)
78f81cc4 1875{
fe08bc4b
HMH		 1876 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
1877
8d376cd6 1878 IBM_ACPIHANDLE_INIT(led);
5fba344c 1879
78f81cc4
BD		 1880 if (!led_handle)
1881 /* led not supported on R30, R31 */
efa27145 1882 led_supported = TPACPI_LED_NONE;
78f81cc4
BD		 1883 else if (strlencmp(led_path, "SLED") == 0)
1884 /* 570 */
efa27145 1885 led_supported = TPACPI_LED_570;
78f81cc4
BD		 1886 else if (strlencmp(led_path, "SYSL") == 0)
1887 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
efa27145 1888 led_supported = TPACPI_LED_OLD;
78f81cc4
BD		 1889 else
1890 /* all others */
efa27145 1891 led_supported = TPACPI_LED_NEW;
78f81cc4 1892
fe08bc4b
HMH		 1893 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
1894 str_supported(led_supported), led_supported);
1895
5fba344c 1896 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
78f81cc4
BD		 1897}
1898
1899#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1900
1901static int led_read(char *p)
1da177e4
LT		 1902{
1903 int len = 0;
1904
78f81cc4
BD		 1905 if (!led_supported) {
1906 len += sprintf(p + len, "status:\t\tnot supported\n");
1907 return len;
1908 }
1909 len += sprintf(p + len, "status:\t\tsupported\n");
1910
efa27145 1911 if (led_supported == TPACPI_LED_570) {
78f81cc4
BD		 1912 /* 570 */
1913 int i, status;
1914 for (i = 0; i < 8; i++) {
1915 if (!acpi_evalf(ec_handle,
1916 &status, "GLED", "dd", 1 << i))
1917 return -EIO;
1918 len += sprintf(p + len, "%d:\t\t%s\n",
1919 i, led_status(status));
1920 }
1921 }
1922
1da177e4 1923 len += sprintf(p + len, "commands:\t"
78f81cc4 1924 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1da177e4
LT		 1925
1926 return len;
1927}
1928
78f81cc4
BD		 1929/* off, on, blink */
1930static const int led_sled_arg1[] = { 0, 1, 3 };
1931static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1932static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1933static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1934
78f81cc4 1935static int led_write(char *buf)
1da177e4
LT		 1936{
1937 char *cmd;
78f81cc4
BD		 1938 int led, ind, ret;
1939
1940 if (!led_supported)
1941 return -ENODEV;
1da177e4
LT		 1942
1943 while ((cmd = next_cmd(&buf))) {
78f81cc4 1944 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1da177e4
LT		 1945 return -EINVAL;
1946
78f81cc4
BD		 1947 if (strstr(cmd, "off")) {
1948 ind = 0;
1da177e4 1949 } else if (strstr(cmd, "on")) {
78f81cc4
BD		 1950 ind = 1;
1951 } else if (strstr(cmd, "blink")) {
1952 ind = 2;
1da177e4
LT		 1953 } else
1954 return -EINVAL;
78f81cc4 1955
efa27145 1956 if (led_supported == TPACPI_LED_570) {
78f81cc4
BD		 1957 /* 570 */
1958 led = 1 << led;
1da177e4 1959 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
78f81cc4 1960 led, led_sled_arg1[ind]))
1da177e4 1961 return -EIO;
efa27145 1962 } else if (led_supported == TPACPI_LED_OLD) {
78f81cc4
BD		 1963 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1964 led = 1 << led;
efa27145 1965 ret = ec_write(TPACPI_LED_EC_HLMS, led);
78f81cc4
BD		 1966 if (ret >= 0)
1967 ret =
efa27145 1968 ec_write(TPACPI_LED_EC_HLBL,
e062e034 1969 led * led_exp_hlbl[ind]);
78f81cc4
BD		 1970 if (ret >= 0)
1971 ret =
efa27145 1972 ec_write(TPACPI_LED_EC_HLCL,
e062e034 1973 led * led_exp_hlcl[ind]);
78f81cc4
BD		 1974 if (ret < 0)
1975 return ret;
1976 } else {
1977 /* all others */
1978 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1979 led, led_led_arg1[ind]))
1da177e4 1980 return -EIO;
78f81cc4
BD		 1981 }
1982 }
1983
1984 return 0;
1985}
1986
a5763f22
HMH		 1987static struct ibm_struct led_driver_data = {
1988 .name = "led",
1989 .read = led_read,
1990 .write = led_write,
1991};
1992
56b6aeb0
HMH		 1993/*************************************************************************
1994 * Beep subdriver
1995 */
1996
1997IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
1998
a5763f22 1999static int __init beep_init(struct ibm_init_struct *iibm)
5fba344c 2000{
fe08bc4b
HMH		 2001 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2002
8d376cd6 2003 IBM_ACPIHANDLE_INIT(beep);
5fba344c 2004
fe08bc4b
HMH		 2005 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2006 str_supported(beep_handle != NULL));
2007
5fba344c
HMH		 2008 return (beep_handle)? 0 : 1;
2009}
2010
78f81cc4
BD		 2011static int beep_read(char *p)
2012{
2013 int len = 0;
2014
2015 if (!beep_handle)
2016 len += sprintf(p + len, "status:\t\tnot supported\n");
2017 else {
2018 len += sprintf(p + len, "status:\t\tsupported\n");
2019 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2020 }
2021
2022 return len;
2023}
2024
2025static int beep_write(char *buf)
2026{
2027 char *cmd;
2028 int beep_cmd;
2029
2030 if (!beep_handle)
2031 return -ENODEV;
2032
2033 while ((cmd = next_cmd(&buf))) {
2034 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2035 beep_cmd >= 0 && beep_cmd <= 17) {
2036 /* beep_cmd set */
2037 } else
2038 return -EINVAL;
2039 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2040 return -EIO;
2041 }
2042
2043 return 0;
2044}
2045
a5763f22
HMH		 2046static struct ibm_struct beep_driver_data = {
2047 .name = "beep",
2048 .read = beep_read,
2049 .write = beep_write,
2050};
2051
56b6aeb0
HMH		 2052/*************************************************************************
2053 * Thermal subdriver
2054 */
78f81cc4 2055
a26f878a 2056static enum thermal_access_mode thermal_read_mode;
78f81cc4 2057
2c37aa4e
HMH		 2058/* sysfs temp##_input -------------------------------------------------- */
2059
2060static ssize_t thermal_temp_input_show(struct device *dev,
2061 struct device_attribute *attr,
2062 char *buf)
2063{
2064 struct sensor_device_attribute *sensor_attr =
2065 to_sensor_dev_attr(attr);
2066 int idx = sensor_attr->index;
2067 s32 value;
2068 int res;
2069
2070 res = thermal_get_sensor(idx, &value);
2071 if (res)
2072 return res;
2073 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2074 return -ENXIO;
2075
2076 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2077}
2078
2079#define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2080 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2081
2082static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2083 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2084 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2085 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2086 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2087 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2088 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2089 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2090 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2091 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2092 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2093 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2094 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2095 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2096 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2097 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2098 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2099};
2100
2101#define THERMAL_ATTRS(X) \
2102 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2103
2104static struct attribute *thermal_temp_input_attr[] = {
2105 THERMAL_ATTRS(8),
2106 THERMAL_ATTRS(9),
2107 THERMAL_ATTRS(10),
2108 THERMAL_ATTRS(11),
2109 THERMAL_ATTRS(12),
2110 THERMAL_ATTRS(13),
2111 THERMAL_ATTRS(14),
2112 THERMAL_ATTRS(15),
2113 THERMAL_ATTRS(0),
2114 THERMAL_ATTRS(1),
2115 THERMAL_ATTRS(2),
2116 THERMAL_ATTRS(3),
2117 THERMAL_ATTRS(4),
2118 THERMAL_ATTRS(5),
2119 THERMAL_ATTRS(6),
2120 THERMAL_ATTRS(7),
2121 NULL
2122};
2123
2124static const struct attribute_group thermal_temp_input16_group = {
2125 .attrs = thermal_temp_input_attr
2126};
2127
2128static const struct attribute_group thermal_temp_input8_group = {
2129 .attrs = &thermal_temp_input_attr[8]
2130};
2131
2132#undef THERMAL_SENSOR_ATTR_TEMP
2133#undef THERMAL_ATTRS
2134
2135/* --------------------------------------------------------------------- */
2136
a5763f22 2137static int __init thermal_init(struct ibm_init_struct *iibm)
78f81cc4 2138{
60eb0b35
HMH		 2139 u8 t, ta1, ta2;
2140 int i;
5fba344c 2141 int acpi_tmp7;
2c37aa4e 2142 int res;
5fba344c 2143
fe08bc4b
HMH		 2144 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2145
5fba344c 2146 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
60eb0b35
HMH		 2147
2148 if (ibm_thinkpad_ec_found && experimental) {
2149 /*
2150 * Direct EC access mode: sensors at registers
2151 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2152 * non-implemented, thermal sensors return 0x80 when
2153 * not available
2154 */
78f81cc4 2155
60eb0b35
HMH		 2156 ta1 = ta2 = 0;
2157 for (i = 0; i < 8; i++) {
04cc862c 2158 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
60eb0b35
HMH		 2159 ta1 |= t;
2160 } else {
2161 ta1 = 0;
2162 break;
2163 }
04cc862c 2164 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
60eb0b35
HMH		 2165 ta2 |= t;
2166 } else {
2167 ta1 = 0;
2168 break;
2169 }
2170 }
2171 if (ta1 == 0) {
2172 /* This is sheer paranoia, but we handle it anyway */
2173 if (acpi_tmp7) {
2174 printk(IBM_ERR
2175 "ThinkPad ACPI EC access misbehaving, "
2176 "falling back to ACPI TMPx access mode\n");
efa27145 2177 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
60eb0b35
HMH		 2178 } else {
2179 printk(IBM_ERR
2180 "ThinkPad ACPI EC access misbehaving, "
2181 "disabling thermal sensors access\n");
efa27145 2182 thermal_read_mode = TPACPI_THERMAL_NONE;
60eb0b35
HMH		 2183 }
2184 } else {
2185 thermal_read_mode =
2186 (ta2 != 0) ?
efa27145 2187 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
60eb0b35
HMH		 2188 }
2189 } else if (acpi_tmp7) {
a26f878a
HMH		 2190 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2191 /* 600e/x, 770e, 770x */
efa27145 2192 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
a26f878a
HMH		 2193 } else {
2194 /* Standard ACPI TMPx access, max 8 sensors */
efa27145 2195 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
a26f878a
HMH		 2196 }
2197 } else {
2198 /* temperatures not supported on 570, G4x, R30, R31, R32 */
efa27145 2199 thermal_read_mode = TPACPI_THERMAL_NONE;
a26f878a 2200 }
78f81cc4 2201
fe08bc4b
HMH		 2202 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2203 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2204 thermal_read_mode);
2205
2c37aa4e
HMH		 2206 switch(thermal_read_mode) {
2207 case TPACPI_THERMAL_TPEC_16:
2208 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2209 &thermal_temp_input16_group);
2210 if (res)
2211 return res;
2212 break;
2213 case TPACPI_THERMAL_TPEC_8:
2214 case TPACPI_THERMAL_ACPI_TMP07:
2215 case TPACPI_THERMAL_ACPI_UPDT:
2216 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2217 &thermal_temp_input8_group);
2218 if (res)
2219 return res;
2220 break;
2221 case TPACPI_THERMAL_NONE:
2222 default:
2223 return 1;
2224 }
2225
2226 return 0;
2227}
2228
2229static void thermal_exit(void)
2230{
2231 switch(thermal_read_mode) {
2232 case TPACPI_THERMAL_TPEC_16:
2233 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2234 &thermal_temp_input16_group);
2235 break;
2236 case TPACPI_THERMAL_TPEC_8:
2237 case TPACPI_THERMAL_ACPI_TMP07:
2238 case TPACPI_THERMAL_ACPI_UPDT:
2239 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2240 &thermal_temp_input16_group);
2241 break;
2242 case TPACPI_THERMAL_NONE:
2243 default:
2244 break;
2245 }
78f81cc4
BD		 2246}
2247
04cc862c
HMH		 2248/* idx is zero-based */
2249static int thermal_get_sensor(int idx, s32 *value)
78f81cc4 2250{
04cc862c 2251 int t;
60eb0b35 2252 s8 tmp;
04cc862c 2253 char tmpi[5];
78f81cc4 2254
04cc862c 2255 t = TP_EC_THERMAL_TMP0;
78f81cc4 2256
a26f878a 2257 switch (thermal_read_mode) {
efa27145
HMH		 2258#if TPACPI_MAX_THERMAL_SENSORS >= 16
2259 case TPACPI_THERMAL_TPEC_16:
04cc862c
HMH		 2260 if (idx >= 8 && idx <= 15) {
2261 t = TP_EC_THERMAL_TMP8;
2262 idx -= 8;
60eb0b35
HMH		 2263 }
2264 /* fallthrough */
2265#endif
efa27145 2266 case TPACPI_THERMAL_TPEC_8:
04cc862c
HMH		 2267 if (idx <= 7) {
2268 if (!acpi_ec_read(t + idx, &tmp))
78f81cc4 2269 return -EIO;
04cc862c
HMH		 2270 *value = tmp * 1000;
2271 return 0;
60eb0b35 2272 }
04cc862c 2273 break;
78f81cc4 2274
efa27145 2275 case TPACPI_THERMAL_ACPI_UPDT:
04cc862c
HMH		 2276 if (idx <= 7) {
2277 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2278 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2279 return -EIO;
78f81cc4
BD		 2280 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2281 return -EIO;
04cc862c
HMH		 2282 *value = (t - 2732) * 100;
2283 return 0;
78f81cc4 2284 }
04cc862c 2285 break;
78f81cc4 2286
efa27145 2287 case TPACPI_THERMAL_ACPI_TMP07:
04cc862c
HMH		 2288 if (idx <= 7) {
2289 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
78f81cc4
BD		 2290 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2291 return -EIO;
04cc862c
HMH		 2292 *value = t * 1000;
2293 return 0;
78f81cc4 2294 }
04cc862c 2295 break;
78f81cc4 2296
efa27145 2297 case TPACPI_THERMAL_NONE:
a26f878a 2298 default:
04cc862c
HMH		 2299 return -ENOSYS;
2300 }
2301
2302 return -EINVAL;
2303}
2304
2305static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2306{
2307 int res, i;
2308 int n;
2309
2310 n = 8;
2311 i = 0;
2312
2313 if (!s)
2314 return -EINVAL;
2315
2316 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2317 n = 16;
2318
2319 for(i = 0 ; i < n; i++) {
2320 res = thermal_get_sensor(i, &s->temp[i]);
2321 if (res)
2322 return res;
78f81cc4 2323 }
04cc862c
HMH		 2324
2325 return n;
a26f878a
HMH		 2326}
2327
2328static int thermal_read(char *p)
2329{
2330 int len = 0;
2331 int n, i;
2332 struct ibm_thermal_sensors_struct t;
2333
2334 n = thermal_get_sensors(&t);
2335 if (unlikely(n < 0))
2336 return n;
2337
2338 len += sprintf(p + len, "temperatures:\t");
2339
2340 if (n > 0) {
2341 for (i = 0; i < (n - 1); i++)
2342 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2343 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2344 } else
2345 len += sprintf(p + len, "not supported\n");
78f81cc4
BD		 2346
2347 return len;
2348}
2349
a5763f22
HMH		 2350static struct ibm_struct thermal_driver_data = {
2351 .name = "thermal",
2352 .read = thermal_read,
2c37aa4e 2353 .exit = thermal_exit,
a5763f22
HMH		 2354};
2355
56b6aeb0
HMH		 2356/*************************************************************************
2357 * EC Dump subdriver
2358 */
2359
78f81cc4
BD		 2360static u8 ecdump_regs[256];
2361
2362static int ecdump_read(char *p)
2363{
2364 int len = 0;
2365 int i, j;
2366 u8 v;
2367
2368 len += sprintf(p + len, "EC "
2369 " +00 +01 +02 +03 +04 +05 +06 +07"
2370 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2371 for (i = 0; i < 256; i += 16) {
2372 len += sprintf(p + len, "EC 0x%02x:", i);
2373 for (j = 0; j < 16; j++) {
2374 if (!acpi_ec_read(i + j, &v))
2375 break;
2376 if (v != ecdump_regs[i + j])
2377 len += sprintf(p + len, " *%02x", v);
2378 else
2379 len += sprintf(p + len, " %02x", v);
2380 ecdump_regs[i + j] = v;
2381 }
2382 len += sprintf(p + len, "\n");
2383 if (j != 16)
2384 break;
2385 }
2386
2387 /* These are way too dangerous to advertise openly... */
2388#if 0
2389 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2390 " (<offset> is 00-ff, <value> is 00-ff)\n");
2391 len += sprintf(p + len, "commands:\t0x<offset> <value> "
2392 " (<offset> is 00-ff, <value> is 0-255)\n");
2393#endif
2394 return len;
2395}
2396
2397static int ecdump_write(char *buf)
2398{
2399 char *cmd;
2400 int i, v;
2401
2402 while ((cmd = next_cmd(&buf))) {
2403 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2404 /* i and v set */
2405 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2406 /* i and v set */
2407 } else
2408 return -EINVAL;
2409 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2410 if (!acpi_ec_write(i, v))
1da177e4
LT		 2411 return -EIO;
2412 } else
2413 return -EINVAL;
2414 }
2415
2416 return 0;
78f81cc4
BD		 2417}
2418
a5763f22
HMH		 2419static struct ibm_struct ecdump_driver_data = {
2420 .name = "ecdump",
2421 .read = ecdump_read,
2422 .write = ecdump_write,
92641177 2423 .flags.experimental = 1,
a5763f22
HMH		 2424};
2425
56b6aeb0
HMH		 2426/*************************************************************************
2427 * Backlight/brightness subdriver
2428 */
2429
2430static struct backlight_device *ibm_backlight_device = NULL;
2431
2432static struct backlight_ops ibm_backlight_data = {
2433 .get_brightness = brightness_get,
2434 .update_status = brightness_update_status,
2435};
2436
a5763f22 2437static int __init brightness_init(struct ibm_init_struct *iibm)
56b6aeb0
HMH		 2438{
2439 int b;
2440
fe08bc4b
HMH		 2441 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2442
56b6aeb0
HMH		 2443 b = brightness_get(NULL);
2444 if (b < 0)
2445 return b;
2446
7d5a015e
HMH		 2447 ibm_backlight_device = backlight_device_register(
2448 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2449 &ibm_backlight_data);
56b6aeb0
HMH		 2450 if (IS_ERR(ibm_backlight_device)) {
2451 printk(IBM_ERR "Could not register backlight device\n");
2452 return PTR_ERR(ibm_backlight_device);
2453 }
fe08bc4b 2454 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
56b6aeb0
HMH		 2455
2456 ibm_backlight_device->props.max_brightness = 7;
2457 ibm_backlight_device->props.brightness = b;
2458 backlight_update_status(ibm_backlight_device);
2459
2460 return 0;
2461}
2462
2463static void brightness_exit(void)
2464{
2465 if (ibm_backlight_device) {
fe08bc4b
HMH		 2466 vdbg_printk(TPACPI_DBG_EXIT,
2467 "calling backlight_device_unregister()\n");
56b6aeb0
HMH		 2468 backlight_device_unregister(ibm_backlight_device);
2469 ibm_backlight_device = NULL;
2470 }
2471}
2472
2473static int brightness_update_status(struct backlight_device *bd)
2474{
2475 return brightness_set(
2476 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2477 bd->props.power == FB_BLANK_UNBLANK) ?
2478 bd->props.brightness : 0);
2479}
2480
8acb0250
HM		 2481static int brightness_get(struct backlight_device *bd)
2482{
8d297264
HMH		 2483 u8 level;
2484 if (!acpi_ec_read(brightness_offset, &level))
2485 return -EIO;
8acb0250 2486
8d297264 2487 level &= 0x7;
fb87a811 2488
8d297264 2489 return level;
8acb0250
HM		 2490}
2491
8acb0250 2492static int brightness_set(int value)
1da177e4 2493{
78f81cc4 2494 int cmos_cmd, inc, i;
8acb0250
HM		 2495 int current_value = brightness_get(NULL);
2496
2497 value &= 7;
2498
56b6aeb0 2499 cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
8acb0250
HM		 2500 inc = value > current_value ? 1 : -1;
2501 for (i = current_value; i != value; i += inc) {
c9bea99c 2502 if (issue_thinkpad_cmos_command(cmos_cmd))
8acb0250
HM		 2503 return -EIO;
2504 if (!acpi_ec_write(brightness_offset, i + inc))
2505 return -EIO;
2506 }
2507
2508 return 0;
2509}
2510
56b6aeb0
HMH		 2511static int brightness_read(char *p)
2512{
2513 int len = 0;
2514 int level;
2515
2516 if ((level = brightness_get(NULL)) < 0) {
2517 len += sprintf(p + len, "level:\t\tunreadable\n");
2518 } else {
2519 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2520 len += sprintf(p + len, "commands:\tup, down\n");
2521 len += sprintf(p + len, "commands:\tlevel <level>"
2522 " (<level> is 0-7)\n");
2523 }
2524
2525 return len;
2526}
2527
8acb0250
HM		 2528static int brightness_write(char *buf)
2529{
2530 int level;
78f81cc4 2531 int new_level;
1da177e4 2532 char *cmd;
1da177e4
LT		 2533
2534 while ((cmd = next_cmd(&buf))) {
8acb0250
HM		 2535 if ((level = brightness_get(NULL)) < 0)
2536 return level;
78f81cc4
BD		 2537 level &= 7;
2538
2539 if (strlencmp(cmd, "up") == 0) {
2540 new_level = level == 7 ? 7 : level + 1;
2541 } else if (strlencmp(cmd, "down") == 0) {
2542 new_level = level == 0 ? 0 : level - 1;
2543 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2544 new_level >= 0 && new_level <= 7) {
2545 /* new_level set */
2546 } else
2547 return -EINVAL;
2548
8acb0250 2549 brightness_set(new_level);
78f81cc4
BD		 2550 }
2551
2552 return 0;
2553}
2554
a5763f22
HMH		 2555static struct ibm_struct brightness_driver_data = {
2556 .name = "brightness",
2557 .read = brightness_read,
2558 .write = brightness_write,
2559 .exit = brightness_exit,
2560};
2561
56b6aeb0
HMH		 2562/*************************************************************************
2563 * Volume subdriver
2564 */
fb87a811 2565
78f81cc4
BD		 2566static int volume_read(char *p)
2567{
2568 int len = 0;
2569 u8 level;
2570
2571 if (!acpi_ec_read(volume_offset, &level)) {
2572 len += sprintf(p + len, "level:\t\tunreadable\n");
2573 } else {
2574 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2575 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2576 len += sprintf(p + len, "commands:\tup, down, mute\n");
2577 len += sprintf(p + len, "commands:\tlevel <level>"
2578 " (<level> is 0-15)\n");
2579 }
2580
2581 return len;
2582}
2583
78f81cc4
BD		 2584static int volume_write(char *buf)
2585{
2586 int cmos_cmd, inc, i;
2587 u8 level, mute;
2588 int new_level, new_mute;
2589 char *cmd;
2590
2591 while ((cmd = next_cmd(&buf))) {
2592 if (!acpi_ec_read(volume_offset, &level))
2593 return -EIO;
2594 new_mute = mute = level & 0x40;
2595 new_level = level = level & 0xf;
2596
2597 if (strlencmp(cmd, "up") == 0) {
2598 if (mute)
2599 new_mute = 0;
2600 else
2601 new_level = level == 15 ? 15 : level + 1;
2602 } else if (strlencmp(cmd, "down") == 0) {
2603 if (mute)
2604 new_mute = 0;
2605 else
2606 new_level = level == 0 ? 0 : level - 1;
2607 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2608 new_level >= 0 && new_level <= 15) {
2609 /* new_level set */
2610 } else if (strlencmp(cmd, "mute") == 0) {
2611 new_mute = 0x40;
1da177e4
LT		 2612 } else
2613 return -EINVAL;
2614
78f81cc4 2615 if (new_level != level) { /* mute doesn't change */
56b6aeb0 2616 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
78f81cc4
BD		 2617 inc = new_level > level ? 1 : -1;
2618
c9bea99c 2619 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
78f81cc4
BD		 2620 !acpi_ec_write(volume_offset, level)))
2621 return -EIO;
2622
2623 for (i = level; i != new_level; i += inc)
c9bea99c 2624 if (issue_thinkpad_cmos_command(cmos_cmd) ||
78f81cc4
BD		 2625 !acpi_ec_write(volume_offset, i + inc))
2626 return -EIO;
2627
c9bea99c 2628 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
78f81cc4
BD		 2629 !acpi_ec_write(volume_offset,
2630 new_level + mute)))
2631 return -EIO;
2632 }
2633
2634 if (new_mute != mute) { /* level doesn't change */
56b6aeb0 2635 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
78f81cc4 2636
c9bea99c 2637 if (issue_thinkpad_cmos_command(cmos_cmd) ||
78f81cc4
BD		 2638 !acpi_ec_write(volume_offset, level + new_mute))
2639 return -EIO;
2640 }
2641 }
2642
2643 return 0;
2644}
2645
a5763f22
HMH		 2646static struct ibm_struct volume_driver_data = {
2647 .name = "volume",
2648 .read = volume_read,
2649 .write = volume_write,
2650};
56b6aeb0
HMH		 2651
2652/*************************************************************************
2653 * Fan subdriver
2654 */
2655
2656/*
2657 * FAN ACCESS MODES
2658 *
efa27145 2659 * TPACPI_FAN_RD_ACPI_GFAN:
56b6aeb0
HMH		 2660 * ACPI GFAN method: returns fan level
2661 *
efa27145 2662 * see TPACPI_FAN_WR_ACPI_SFAN
f51d1a39 2663 * EC 0x2f (HFSP) not available if GFAN exists
56b6aeb0 2664 *
efa27145 2665 * TPACPI_FAN_WR_ACPI_SFAN:
56b6aeb0
HMH		 2666 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2667 *
f51d1a39
HMH		 2668 * EC 0x2f (HFSP) might be available *for reading*, but do not use
2669 * it for writing.
56b6aeb0 2670 *
efa27145 2671 * TPACPI_FAN_WR_TPEC:
f51d1a39
HMH		 2672 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
2673 * Supported on almost all ThinkPads
56b6aeb0
HMH		 2674 *
2675 * Fan speed changes of any sort (including those caused by the
2676 * disengaged mode) are usually done slowly by the firmware as the
2677 * maximum ammount of fan duty cycle change per second seems to be
2678 * limited.
2679 *
2680 * Reading is not available if GFAN exists.
2681 * Writing is not available if SFAN exists.
2682 *
2683 * Bits
2684 * 7 automatic mode engaged;
2685 * (default operation mode of the ThinkPad)
2686 * fan level is ignored in this mode.
f51d1a39 2687 * 6 full speed mode (takes precedence over bit 7);
56b6aeb0 2688 * not available on all thinkpads. May disable
f51d1a39
HMH		 2689 * the tachometer while the fan controller ramps up
2690 * the speed (which can take up to a few *minutes*).
2691 * Speeds up fan to 100% duty-cycle, which is far above
2692 * the standard RPM levels. It is not impossible that
2693 * it could cause hardware damage.
56b6aeb0
HMH		 2694 * 5-3 unused in some models. Extra bits for fan level
2695 * in others, but still useless as all values above
2696 * 7 map to the same speed as level 7 in these models.
2697 * 2-0 fan level (0..7 usually)
2698 * 0x00 = stop
2699 * 0x07 = max (set when temperatures critical)
2700 * Some ThinkPads may have other levels, see
efa27145 2701 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
56b6aeb0
HMH		 2702 *
2703 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2704 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2705 * does so, its initial value is meaningless (0x07).
2706 *
2707 * For firmware bugs, refer to:
2708 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2709 *
2710 * ----
2711 *
2712 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2713 * Main fan tachometer reading (in RPM)
2714 *
2715 * This register is present on all ThinkPads with a new-style EC, and
2716 * it is known not to be present on the A21m/e, and T22, as there is
2717 * something else in offset 0x84 according to the ACPI DSDT. Other
2718 * ThinkPads from this same time period (and earlier) probably lack the
2719 * tachometer as well.
2720 *
2721 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2722 * was never fixed by IBM to report the EC firmware version string
2723 * probably support the tachometer (like the early X models), so
2724 * detecting it is quite hard. We need more data to know for sure.
2725 *
2726 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2727 * might result.
2728 *
f51d1a39
HMH		 2729 * FIRMWARE BUG: may go stale while the EC is switching to full speed
2730 * mode.
56b6aeb0
HMH		 2731 *
2732 * For firmware bugs, refer to:
2733 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2734 *
efa27145 2735 * TPACPI_FAN_WR_ACPI_FANS:
56b6aeb0
HMH		 2736 * ThinkPad X31, X40, X41. Not available in the X60.
2737 *
2738 * FANS ACPI handle: takes three arguments: low speed, medium speed,
2739 * high speed. ACPI DSDT seems to map these three speeds to levels
2740 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2741 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2742 *
2743 * The speeds are stored on handles
2744 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2745 *
2746 * There are three default speed sets, acessible as handles:
2747 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2748 *
2749 * ACPI DSDT switches which set is in use depending on various
2750 * factors.
2751 *
efa27145 2752 * TPACPI_FAN_WR_TPEC is also available and should be used to
56b6aeb0
HMH		 2753 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
2754 * but the ACPI tables just mention level 7.
2755 */
2756
69ba91cb
HMH		 2757static enum fan_status_access_mode fan_status_access_mode;
2758static enum fan_control_access_mode fan_control_access_mode;
2759static enum fan_control_commands fan_control_commands;
78f81cc4 2760
778b4d74 2761static u8 fan_control_initial_status;
fe98a52c 2762static u8 fan_control_desired_level;
778b4d74 2763
25c68a33 2764static void fan_watchdog_fire(struct work_struct *ignored);
16663a87 2765static int fan_watchdog_maxinterval;
25c68a33 2766static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
16663a87 2767
56b6aeb0
HMH		 2768IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
2769IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
2770 "\\FSPD", /* 600e/x, 770e, 770x */
2771 ); /* all others */
2772IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
2773 "JFNS", /* 770x-JL */
2774 ); /* all others */
2775
fe98a52c
HMH		 2776/*
2777 * SYSFS fan layout: hwmon compatible (device)
2778 *
2779 * pwm*_enable:
2780 * 0: "disengaged" mode
2781 * 1: manual mode
2782 * 2: native EC "auto" mode (recommended, hardware default)
2783 *
2784 * pwm*: set speed in manual mode, ignored otherwise.
2785 * 0 is level 0; 255 is level 7. Intermediate points done with linear
2786 * interpolation.
2787 *
2788 * fan*_input: tachometer reading, RPM
2789 *
2790 *
2791 * SYSFS fan layout: extensions
2792 *
2793 * fan_watchdog (driver):
2794 * fan watchdog interval in seconds, 0 disables (default), max 120
2795 */
2796
2797/* sysfs fan pwm1_enable ----------------------------------------------- */
2798static ssize_t fan_pwm1_enable_show(struct device *dev,
2799 struct device_attribute *attr,
2800 char *buf)
2801{
2802 int res, mode;
2803 u8 status;
2804
2805 res = fan_get_status_safe(&status);
2806 if (res)
2807 return res;
2808
2809 if (unlikely(tp_features.fan_ctrl_status_undef)) {
2810 if (status != fan_control_initial_status) {
2811 tp_features.fan_ctrl_status_undef = 0;
2812 } else {
2813 /* Return most likely status. In fact, it
2814 * might be the only possible status */
2815 status = TP_EC_FAN_AUTO;
2816 }
2817 }
2818
2819 if (status & TP_EC_FAN_FULLSPEED) {
2820 mode = 0;
2821 } else if (status & TP_EC_FAN_AUTO) {
2822 mode = 2;
2823 } else
2824 mode = 1;
2825
2826 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
2827}
2828
2829static ssize_t fan_pwm1_enable_store(struct device *dev,
2830 struct device_attribute *attr,
2831 const char *buf, size_t count)
2832{
2833 unsigned long t;
2834 int res, level;
2835
2836 if (parse_strtoul(buf, 2, &t))
2837 return -EINVAL;
2838
2839 switch (t) {
2840 case 0:
2841 level = TP_EC_FAN_FULLSPEED;
2842 break;
2843 case 1:
2844 level = TPACPI_FAN_LAST_LEVEL;
2845 break;
2846 case 2:
2847 level = TP_EC_FAN_AUTO;
2848 break;
2849 case 3:
2850 /* reserved for software-controlled auto mode */
2851 return -ENOSYS;
2852 default:
2853 return -EINVAL;
2854 }
2855
2856 res = fan_set_level_safe(level);
c573ddb9
HMH		 2857 if (res == -ENXIO)
2858 return -EINVAL;
2859 else if (res < 0)
fe98a52c
HMH		 2860 return res;
2861
2862 fan_watchdog_reset();
2863
2864 return count;
2865}
2866
2867static struct device_attribute dev_attr_fan_pwm1_enable =
2868 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
2869 fan_pwm1_enable_show, fan_pwm1_enable_store);
2870
2871/* sysfs fan pwm1 ------------------------------------------------------ */
2872static ssize_t fan_pwm1_show(struct device *dev,
2873 struct device_attribute *attr,
2874 char *buf)
2875{
2876 int res;
2877 u8 status;
2878
2879 res = fan_get_status_safe(&status);
2880 if (res)
2881 return res;
2882
2883 if (unlikely(tp_features.fan_ctrl_status_undef)) {
2884 if (status != fan_control_initial_status) {
2885 tp_features.fan_ctrl_status_undef = 0;
2886 } else {
2887 status = TP_EC_FAN_AUTO;
2888 }
2889 }
2890
2891 if ((status &
2892 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
2893 status = fan_control_desired_level;
2894
2895 if (status > 7)
2896 status = 7;
2897
2898 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
2899}
2900
2901static ssize_t fan_pwm1_store(struct device *dev,
2902 struct device_attribute *attr,
2903 const char *buf, size_t count)
2904{
2905 unsigned long s;
2906 int rc;
2907 u8 status, newlevel;
2908
2909 if (parse_strtoul(buf, 255, &s))
2910 return -EINVAL;
2911
2912 /* scale down from 0-255 to 0-7 */
2913 newlevel = (s >> 5) & 0x07;
2914
2915 rc = mutex_lock_interruptible(&fan_mutex);
2916 if (rc < 0)
2917 return rc;
2918
2919 rc = fan_get_status(&status);
2920 if (!rc && (status &
2921 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
2922 rc = fan_set_level(newlevel);
c573ddb9
HMH		 2923 if (rc == -ENXIO)
2924 rc = -EINVAL;
2925 else if (!rc) {
fe98a52c 2926 fan_update_desired_level(newlevel);
ca4ac2f4
HMH		 2927 fan_watchdog_reset();
2928 }
fe98a52c
HMH		 2929 }
2930
2931 mutex_unlock(&fan_mutex);
2932 return (rc)? rc : count;
2933}
2934
2935static struct device_attribute dev_attr_fan_pwm1 =
2936 __ATTR(pwm1, S_IWUSR | S_IRUGO,
2937 fan_pwm1_show, fan_pwm1_store);
2938
2939/* sysfs fan fan1_input ------------------------------------------------ */
2940static ssize_t fan_fan1_input_show(struct device *dev,
2941 struct device_attribute *attr,
2942 char *buf)
2943{
2944 int res;
2945 unsigned int speed;
2946
2947 res = fan_get_speed(&speed);
2948 if (res < 0)
2949 return res;
2950
2951 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
2952}
2953
2954static struct device_attribute dev_attr_fan_fan1_input =
2955 __ATTR(fan1_input, S_IRUGO,
2956 fan_fan1_input_show, NULL);
2957
2958/* sysfs fan fan_watchdog (driver) ------------------------------------- */
2959static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
2960 char *buf)
2961{
2962 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
2963}
2964
2965static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
2966 const char *buf, size_t count)
2967{
2968 unsigned long t;
2969
2970 if (parse_strtoul(buf, 120, &t))
2971 return -EINVAL;
2972
ecf2a80a
HMH		 2973 if (!fan_control_allowed)
2974 return -EPERM;
2975
fe98a52c
HMH		 2976 fan_watchdog_maxinterval = t;
2977 fan_watchdog_reset();
2978
2979 return count;
2980}
2981
2982static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
2983 fan_fan_watchdog_show, fan_fan_watchdog_store);
2984
2985/* --------------------------------------------------------------------- */
2986static struct attribute *fan_attributes[] = {
2987 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
2988 &dev_attr_fan_fan1_input.attr,
2989 NULL
2990};
2991
2992static const struct attribute_group fan_attr_group = {
2993 .attrs = fan_attributes,
2994};
2995
a5763f22 2996static int __init fan_init(struct ibm_init_struct *iibm)
78f81cc4 2997{
fe98a52c
HMH		 2998 int rc;
2999
fe08bc4b
HMH		 3000 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3001
40ca9fdf 3002 mutex_init(&fan_mutex);
efa27145
HMH		 3003 fan_status_access_mode = TPACPI_FAN_NONE;
3004 fan_control_access_mode = TPACPI_FAN_WR_NONE;
69ba91cb 3005 fan_control_commands = 0;
16663a87 3006 fan_watchdog_maxinterval = 0;
d8fd94d9 3007 tp_features.fan_ctrl_status_undef = 0;
fe98a52c 3008 fan_control_desired_level = 7;
78f81cc4 3009
8d376cd6
HMH		 3010 IBM_ACPIHANDLE_INIT(fans);
3011 IBM_ACPIHANDLE_INIT(gfan);
3012 IBM_ACPIHANDLE_INIT(sfan);
5fba344c 3013
78f81cc4
BD		 3014 if (gfan_handle) {
3015 /* 570, 600e/x, 770e, 770x */
efa27145 3016 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
69ba91cb
HMH		 3017 } else {
3018 /* all other ThinkPads: note that even old-style
3019 * ThinkPad ECs supports the fan control register */
778b4d74
HMH		 3020 if (likely(acpi_ec_read(fan_status_offset,
3021 &fan_control_initial_status))) {
efa27145 3022 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
778b4d74
HMH		 3023
3024 /* In some ThinkPads, neither the EC nor the ACPI
3025 * DSDT initialize the fan status, and it ends up
3026 * being set to 0x07 when it *could* be either
3027 * 0x07 or 0x80.
3028 *
3029 * Enable for TP-1Y (T43), TP-78 (R51e),
3030 * TP-76 (R52), TP-70 (T43, R52), which are known
3031 * to be buggy. */
3032 if (fan_control_initial_status == 0x07 &&
3033 ibm_thinkpad_ec_found &&
3034 ((ibm_thinkpad_ec_found[0] == '1' &&
3035 ibm_thinkpad_ec_found[1] == 'Y') ||
3036 (ibm_thinkpad_ec_found[0] == '7' &&
3037 (ibm_thinkpad_ec_found[1] == '6' ||
3038 ibm_thinkpad_ec_found[1] == '8' ||
3039 ibm_thinkpad_ec_found[1] == '0'))
3040 )) {
3041 printk(IBM_NOTICE
3042 "fan_init: initial fan status is "
3043 "unknown, assuming it is in auto "
3044 "mode\n");
d8fd94d9 3045 tp_features.fan_ctrl_status_undef = 1;
778b4d74 3046 }
69ba91cb
HMH		 3047 } else {
3048 printk(IBM_ERR
3049 "ThinkPad ACPI EC access misbehaving, "
3050 "fan status and control unavailable\n");
5fba344c 3051 return 1;
69ba91cb
HMH		 3052 }
3053 }
78f81cc4 3054
69ba91cb
HMH		 3055 if (sfan_handle) {
3056 /* 570, 770x-JL */
efa27145 3057 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
1c6a334e 3058 fan_control_commands |=
efa27145 3059 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
78f81cc4 3060 } else {
69ba91cb
HMH		 3061 if (!gfan_handle) {
3062 /* gfan without sfan means no fan control */
3063 /* all other models implement TP EC 0x2f control */
3064
3065 if (fans_handle) {
a8b7a662 3066 /* X31, X40, X41 */
69ba91cb 3067 fan_control_access_mode =
efa27145 3068 TPACPI_FAN_WR_ACPI_FANS;
69ba91cb 3069 fan_control_commands |=
efa27145
HMH		 3070 TPACPI_FAN_CMD_SPEED |
3071 TPACPI_FAN_CMD_LEVEL |
3072 TPACPI_FAN_CMD_ENABLE;
69ba91cb 3073 } else {
efa27145 3074 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
a12095c2 3075 fan_control_commands |=
efa27145
HMH		 3076 TPACPI_FAN_CMD_LEVEL |
3077 TPACPI_FAN_CMD_ENABLE;
69ba91cb
HMH		 3078 }
3079 }
3080 }
3081
fe08bc4b
HMH		 3082 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3083 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3084 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3085 fan_status_access_mode, fan_control_access_mode);
3086
ecf2a80a
HMH		 3087 /* fan control master switch */
3088 if (!fan_control_allowed) {
3089 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3090 fan_control_commands = 0;
3091 dbg_printk(TPACPI_DBG_INIT,
3092 "fan control features disabled by parameter\n");
3093 }
3094
fe98a52c
HMH		 3095 /* update fan_control_desired_level */
3096 if (fan_status_access_mode != TPACPI_FAN_NONE)
3097 fan_get_status_safe(NULL);
3098
3099 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3100 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3101 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3102 &fan_attr_group);
3103 if (!(rc < 0))
3104 rc = driver_create_file(&tpacpi_pdriver.driver,
3105 &driver_attr_fan_watchdog);
3106 if (rc < 0)
3107 return rc;
3108 return 0;
3109 } else
3110 return 1;
3111}
3112
3113/*
3114 * Call with fan_mutex held
3115 */
3116static void fan_update_desired_level(u8 status)
3117{
3118 if ((status &
3119 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3120 if (status > 7)
3121 fan_control_desired_level = 7;
3122 else
3123 fan_control_desired_level = status;
3124 }
69ba91cb 3125}
78f81cc4 3126
c52f0aa5 3127static int fan_get_status(u8 *status)
78f81cc4 3128{
c52f0aa5 3129 u8 s;
78f81cc4 3130
a8b7a662 3131 /* TODO:
efa27145 3132 * Add TPACPI_FAN_RD_ACPI_FANS ? */
a8b7a662 3133
3ef8a609 3134 switch (fan_status_access_mode) {
efa27145 3135 case TPACPI_FAN_RD_ACPI_GFAN:
78f81cc4 3136 /* 570, 600e/x, 770e, 770x */
c52f0aa5
HMH		 3137
3138 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1da177e4 3139 return -EIO;
78f81cc4 3140
c52f0aa5
HMH		 3141 if (likely(status))
3142 *status = s & 0x07;
3ef8a609
HMH		 3143
3144 break;
3145
efa27145 3146 case TPACPI_FAN_RD_TPEC:
78f81cc4 3147 /* all except 570, 600e/x, 770e, 770x */
c52f0aa5 3148 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3ef8a609 3149 return -EIO;
78f81cc4 3150
c52f0aa5
HMH		 3151 if (likely(status))
3152 *status = s;
3153
3154 break;
3155
3156 default:
3157 return -ENXIO;
78f81cc4
BD		 3158 }
3159
c52f0aa5
HMH		 3160 return 0;
3161}
3162
fe98a52c
HMH		 3163static int fan_get_status_safe(u8 *status)
3164{
3165 int rc;
3166 u8 s;
3167
3168 rc = mutex_lock_interruptible(&fan_mutex);
3169 if (rc < 0)
3170 return rc;
3171 rc = fan_get_status(&s);
3172 if (!rc)
3173 fan_update_desired_level(s);
3174 mutex_unlock(&fan_mutex);
3175
3176 if (status)
3177 *status = s;
3178
3179 return rc;
3180}
3181
56b6aeb0
HMH		 3182static void fan_exit(void)
3183{
99fba3f8 3184 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
fe98a52c
HMH		 3185
3186 /* FIXME: can we really do this unconditionally? */
3187 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3188 driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3189
56b6aeb0
HMH		 3190 cancel_delayed_work(&fan_watchdog_task);
3191 flush_scheduled_work();
3192}
3193
c52f0aa5
HMH		 3194static int fan_get_speed(unsigned int *speed)
3195{
3196 u8 hi, lo;
3197
3198 switch (fan_status_access_mode) {
efa27145 3199 case TPACPI_FAN_RD_TPEC:
78f81cc4 3200 /* all except 570, 600e/x, 770e, 770x */
3ef8a609
HMH		 3201 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3202 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3203 return -EIO;
3ef8a609 3204
c52f0aa5
HMH		 3205 if (likely(speed))
3206 *speed = (hi << 8) | lo;
3207
3208 break;
3209
3210 default:
3211 return -ENXIO;
3212 }
3213
3214 return 0;
3215}
3216
56b6aeb0 3217static void fan_watchdog_fire(struct work_struct *ignored)
16663a87 3218{
99fba3f8
HMH		 3219 int rc;
3220
56b6aeb0 3221 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
99fba3f8
HMH		 3222 rc = fan_set_enable();
3223 if (rc < 0) {
3224 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3225 "will try again later...\n", -rc);
56b6aeb0
HMH		 3226 /* reschedule for later */
3227 fan_watchdog_reset();
3228 }
16663a87
HMH		 3229}
3230
3231static void fan_watchdog_reset(void)
3232{
3233 static int fan_watchdog_active = 0;
3234
4985cd0a
HMH		 3235 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3236 return;
3237
16663a87
HMH		 3238 if (fan_watchdog_active)
3239 cancel_delayed_work(&fan_watchdog_task);
3240
3241 if (fan_watchdog_maxinterval > 0) {
3242 fan_watchdog_active = 1;
3243 if (!schedule_delayed_work(&fan_watchdog_task,
3244 msecs_to_jiffies(fan_watchdog_maxinterval
3245 * 1000))) {
3246 printk(IBM_ERR "failed to schedule the fan watchdog, "
3247 "watchdog will not trigger\n");
3248 }
3249 } else
3250 fan_watchdog_active = 0;
3251}
3252
18ad7996 3253static int fan_set_level(int level)
78f81cc4 3254{
ecf2a80a
HMH		 3255 if (!fan_control_allowed)
3256 return -EPERM;
3257
18ad7996 3258 switch (fan_control_access_mode) {
efa27145 3259 case TPACPI_FAN_WR_ACPI_SFAN:
18ad7996 3260 if (level >= 0 && level <= 7) {
fe98a52c 3261 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
78f81cc4 3262 return -EIO;
18ad7996
HMH		 3263 } else
3264 return -EINVAL;
3265 break;
3266
efa27145
HMH		 3267 case TPACPI_FAN_WR_ACPI_FANS:
3268 case TPACPI_FAN_WR_TPEC:
3269 if ((level != TP_EC_FAN_AUTO) &&
3270 (level != TP_EC_FAN_FULLSPEED) &&
a12095c2
HMH		 3271 ((level < 0) || (level > 7)))
3272 return -EINVAL;
3273
eaa7571b
HMH		 3274 /* safety net should the EC not support AUTO
3275 * or FULLSPEED mode bits and just ignore them */
3276 if (level & TP_EC_FAN_FULLSPEED)
3277 level |= 7; /* safety min speed 7 */
3278 else if (level & TP_EC_FAN_FULLSPEED)
3279 level |= 4; /* safety min speed 4 */
3280
fe98a52c 3281 if (!acpi_ec_write(fan_status_offset, level))
a12095c2 3282 return -EIO;
778b4d74 3283 else
d8fd94d9 3284 tp_features.fan_ctrl_status_undef = 0;
a12095c2
HMH		 3285 break;
3286
18ad7996
HMH		 3287 default:
3288 return -ENXIO;
3289 }
3290 return 0;
3291}
3292
fe98a52c
HMH		 3293static int fan_set_level_safe(int level)
3294{
3295 int rc;
3296
ecf2a80a
HMH		 3297 if (!fan_control_allowed)
3298 return -EPERM;
3299
fe98a52c
HMH		 3300 rc = mutex_lock_interruptible(&fan_mutex);
3301 if (rc < 0)
3302 return rc;
3303
3304 if (level == TPACPI_FAN_LAST_LEVEL)
3305 level = fan_control_desired_level;
3306
3307 rc = fan_set_level(level);
3308 if (!rc)
3309 fan_update_desired_level(level);
3310
3311 mutex_unlock(&fan_mutex);
3312 return rc;
3313}
3314
18ad7996
HMH		 3315static int fan_set_enable(void)
3316{
1c6a334e
HMH		 3317 u8 s;
3318 int rc;
3319
ecf2a80a
HMH		 3320 if (!fan_control_allowed)
3321 return -EPERM;
3322
40ca9fdf
HMH		 3323 rc = mutex_lock_interruptible(&fan_mutex);
3324 if (rc < 0)
3325 return rc;
3326
18ad7996 3327 switch (fan_control_access_mode) {
efa27145
HMH		 3328 case TPACPI_FAN_WR_ACPI_FANS:
3329 case TPACPI_FAN_WR_TPEC:
40ca9fdf
HMH		 3330 rc = fan_get_status(&s);
3331 if (rc < 0)
3332 break;
1c6a334e
HMH		 3333
3334 /* Don't go out of emergency fan mode */
eaa7571b
HMH		 3335 if (s != 7) {
3336 s &= 0x07;
3337 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3338 }
1c6a334e
HMH		 3339
3340 if (!acpi_ec_write(fan_status_offset, s))
40ca9fdf
HMH		 3341 rc = -EIO;
3342 else {
d8fd94d9 3343 tp_features.fan_ctrl_status_undef = 0;
40ca9fdf
HMH		 3344 rc = 0;
3345 }
1c6a334e
HMH		 3346 break;
3347
efa27145 3348 case TPACPI_FAN_WR_ACPI_SFAN:
40ca9fdf
HMH		 3349 rc = fan_get_status(&s);
3350 if (rc < 0)
3351 break;
1c6a334e
HMH		 3352
3353 s &= 0x07;
3354
3355 /* Set fan to at least level 4 */
eaa7571b 3356 s |= 4;
1c6a334e
HMH		 3357
3358 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
40ca9fdf
HMH		 3359 rc= -EIO;
3360 else
3361 rc = 0;
18ad7996
HMH		 3362 break;
3363
3364 default:
40ca9fdf 3365 rc = -ENXIO;
18ad7996 3366 }
40ca9fdf
HMH		 3367
3368 mutex_unlock(&fan_mutex);
3369 return rc;
18ad7996
HMH		 3370}
3371
3372static int fan_set_disable(void)
3373{
40ca9fdf
HMH		 3374 int rc;
3375
ecf2a80a
HMH		 3376 if (!fan_control_allowed)
3377 return -EPERM;
3378
40ca9fdf
HMH		 3379 rc = mutex_lock_interruptible(&fan_mutex);
3380 if (rc < 0)
3381 return rc;
3382
3383 rc = 0;
18ad7996 3384 switch (fan_control_access_mode) {
efa27145
HMH		 3385 case TPACPI_FAN_WR_ACPI_FANS:
3386 case TPACPI_FAN_WR_TPEC:
18ad7996 3387 if (!acpi_ec_write(fan_status_offset, 0x00))
40ca9fdf 3388 rc = -EIO;
fe98a52c
HMH		 3389 else {
3390 fan_control_desired_level = 0;
d8fd94d9 3391 tp_features.fan_ctrl_status_undef = 0;
fe98a52c 3392 }
18ad7996
HMH		 3393 break;
3394
efa27145 3395 case TPACPI_FAN_WR_ACPI_SFAN:
1c6a334e 3396 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
40ca9fdf 3397 rc = -EIO;
fe98a52c
HMH		 3398 else
3399 fan_control_desired_level = 0;
1c6a334e
HMH		 3400 break;
3401
18ad7996 3402 default:
40ca9fdf 3403 rc = -ENXIO;
18ad7996 3404 }
40ca9fdf 3405
fe98a52c 3406
40ca9fdf
HMH		 3407 mutex_unlock(&fan_mutex);
3408 return rc;
56b6aeb0
HMH		 3409}
3410
3411static int fan_set_speed(int speed)
3412{
40ca9fdf
HMH		 3413 int rc;
3414
ecf2a80a
HMH		 3415 if (!fan_control_allowed)
3416 return -EPERM;
3417
40ca9fdf
HMH		 3418 rc = mutex_lock_interruptible(&fan_mutex);
3419 if (rc < 0)
3420 return rc;
3421
3422 rc = 0;
56b6aeb0 3423 switch (fan_control_access_mode) {
efa27145 3424 case TPACPI_FAN_WR_ACPI_FANS:
56b6aeb0
HMH		 3425 if (speed >= 0 && speed <= 65535) {
3426 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3427 speed, speed, speed))
40ca9fdf 3428 rc = -EIO;
56b6aeb0 3429 } else
40ca9fdf 3430 rc = -EINVAL;
56b6aeb0
HMH		 3431 break;
3432
3433 default:
40ca9fdf 3434 rc = -ENXIO;
56b6aeb0 3435 }
40ca9fdf
HMH		 3436
3437 mutex_unlock(&fan_mutex);
3438 return rc;
56b6aeb0
HMH		 3439}
3440
3441static int fan_read(char *p)
3442{
3443 int len = 0;
3444 int rc;
3445 u8 status;
3446 unsigned int speed = 0;
3447
3448 switch (fan_status_access_mode) {
efa27145 3449 case TPACPI_FAN_RD_ACPI_GFAN:
56b6aeb0 3450 /* 570, 600e/x, 770e, 770x */
fe98a52c 3451 if ((rc = fan_get_status_safe(&status)) < 0)
56b6aeb0
HMH		 3452 return rc;
3453
3454 len += sprintf(p + len, "status:\t\t%s\n"
3455 "level:\t\t%d\n",
3456 (status != 0) ? "enabled" : "disabled", status);
3457 break;
3458
efa27145 3459 case TPACPI_FAN_RD_TPEC:
56b6aeb0 3460 /* all except 570, 600e/x, 770e, 770x */
fe98a52c 3461 if ((rc = fan_get_status_safe(&status)) < 0)
56b6aeb0
HMH		 3462 return rc;
3463
d8fd94d9 3464 if (unlikely(tp_features.fan_ctrl_status_undef)) {
56b6aeb0 3465 if (status != fan_control_initial_status)
d8fd94d9 3466 tp_features.fan_ctrl_status_undef = 0;
56b6aeb0
HMH		 3467 else
3468 /* Return most likely status. In fact, it
3469 * might be the only possible status */
efa27145 3470 status = TP_EC_FAN_AUTO;
56b6aeb0
HMH		 3471 }
3472
3473 len += sprintf(p + len, "status:\t\t%s\n",
3474 (status != 0) ? "enabled" : "disabled");
3475
56b6aeb0
HMH		 3476 if ((rc = fan_get_speed(&speed)) < 0)
3477 return rc;
3478
3479 len += sprintf(p + len, "speed:\t\t%d\n", speed);
3480
efa27145 3481 if (status & TP_EC_FAN_FULLSPEED)
56b6aeb0
HMH		 3482 /* Disengaged mode takes precedence */
3483 len += sprintf(p + len, "level:\t\tdisengaged\n");
efa27145 3484 else if (status & TP_EC_FAN_AUTO)
56b6aeb0
HMH		 3485 len += sprintf(p + len, "level:\t\tauto\n");
3486 else
3487 len += sprintf(p + len, "level:\t\t%d\n", status);
3488 break;
3489
efa27145 3490 case TPACPI_FAN_NONE:
56b6aeb0
HMH		 3491 default:
3492 len += sprintf(p + len, "status:\t\tnot supported\n");
3493 }
3494
efa27145 3495 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
56b6aeb0
HMH		 3496 len += sprintf(p + len, "commands:\tlevel <level>");
3497
3498 switch (fan_control_access_mode) {
efa27145 3499 case TPACPI_FAN_WR_ACPI_SFAN:
56b6aeb0
HMH		 3500 len += sprintf(p + len, " (<level> is 0-7)\n");
3501 break;
3502
3503 default:
3504 len += sprintf(p + len, " (<level> is 0-7, "
fe98a52c 3505 "auto, disengaged, full-speed)\n");
56b6aeb0
HMH		 3506 break;
3507 }
3508 }
18ad7996 3509
efa27145 3510 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
56b6aeb0
HMH		 3511 len += sprintf(p + len, "commands:\tenable, disable\n"
3512 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
3513 "1-120 (seconds))\n");
1da177e4 3514
efa27145 3515 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
56b6aeb0
HMH		 3516 len += sprintf(p + len, "commands:\tspeed <speed>"
3517 " (<speed> is 0-65535)\n");
3518
3519 return len;
78f81cc4
BD		 3520}
3521
18ad7996
HMH		 3522static int fan_write_cmd_level(const char *cmd, int *rc)
3523{
3524 int level;
3525
a12095c2 3526 if (strlencmp(cmd, "level auto") == 0)
efa27145 3527 level = TP_EC_FAN_AUTO;
fe98a52c
HMH		 3528 else if ((strlencmp(cmd, "level disengaged") == 0) |
3529 (strlencmp(cmd, "level full-speed") == 0))
efa27145 3530 level = TP_EC_FAN_FULLSPEED;
a12095c2 3531 else if (sscanf(cmd, "level %d", &level) != 1)
18ad7996
HMH		 3532 return 0;
3533
fe98a52c 3534 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
18ad7996
HMH		 3535 printk(IBM_ERR "level command accepted for unsupported "
3536 "access mode %d", fan_control_access_mode);
3537
3538 return 1;
3539}
3540
3541static int fan_write_cmd_enable(const char *cmd, int *rc)
3542{
3543 if (strlencmp(cmd, "enable") != 0)
3544 return 0;
3545
3546 if ((*rc = fan_set_enable()) == -ENXIO)
3547 printk(IBM_ERR "enable command accepted for unsupported "
3548 "access mode %d", fan_control_access_mode);
3549
3550 return 1;
3551}
3552
3553static int fan_write_cmd_disable(const char *cmd, int *rc)
3554{
3555 if (strlencmp(cmd, "disable") != 0)
3556 return 0;
3557
3558 if ((*rc = fan_set_disable()) == -ENXIO)
3559 printk(IBM_ERR "disable command accepted for unsupported "
3560 "access mode %d", fan_control_access_mode);
3561
3562 return 1;
3563}
3564
3565static int fan_write_cmd_speed(const char *cmd, int *rc)
3566{
3567 int speed;
3568
a8b7a662
HMH		 3569 /* TODO:
3570 * Support speed <low> <medium> <high> ? */
3571
18ad7996
HMH		 3572 if (sscanf(cmd, "speed %d", &speed) != 1)
3573 return 0;
3574
3575 if ((*rc = fan_set_speed(speed)) == -ENXIO)
3576 printk(IBM_ERR "speed command accepted for unsupported "
3577 "access mode %d", fan_control_access_mode);
3578
3579 return 1;
3580}
3581
16663a87
HMH		 3582static int fan_write_cmd_watchdog(const char *cmd, int *rc)
3583{
3584 int interval;
3585
3586 if (sscanf(cmd, "watchdog %d", &interval) != 1)
3587 return 0;
3588
3589 if (interval < 0 || interval > 120)
3590 *rc = -EINVAL;
3591 else
3592 fan_watchdog_maxinterval = interval;
3593
3594 return 1;
3595}
3596
18ad7996
HMH		 3597static int fan_write(char *buf)
3598{
3599 char *cmd;
3600 int rc = 0;
3601
3602 while (!rc && (cmd = next_cmd(&buf))) {
efa27145 3603 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
18ad7996 3604 fan_write_cmd_level(cmd, &rc)) &&
efa27145 3605 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
18ad7996 3606 (fan_write_cmd_enable(cmd, &rc) ||
16663a87
HMH		 3607 fan_write_cmd_disable(cmd, &rc) ||
3608 fan_write_cmd_watchdog(cmd, &rc))) &&
efa27145 3609 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
18ad7996
HMH		 3610 fan_write_cmd_speed(cmd, &rc))
3611 )
3612 rc = -EINVAL;
16663a87
HMH		 3613 else if (!rc)
3614 fan_watchdog_reset();
18ad7996
HMH		 3615 }
3616
3617 return rc;
3618}
3619
a5763f22
HMH		 3620static struct ibm_struct fan_driver_data = {
3621 .name = "fan",
3622 .read = fan_read,
3623 .write = fan_write,
3624 .exit = fan_exit,
a5763f22
HMH		 3625};
3626
56b6aeb0
HMH		 3627/****************************************************************************
3628 ****************************************************************************
3629 *
3630 * Infrastructure
3631 *
3632 ****************************************************************************
3633 ****************************************************************************/
3634
3635/* /proc support */
3636static struct proc_dir_entry *proc_dir = NULL;
16663a87 3637
56b6aeb0 3638/* Subdriver registry */
a5763f22
HMH		 3639static LIST_HEAD(tpacpi_all_drivers);
3640
1da177e4 3641
56b6aeb0
HMH		 3642/*
3643 * Module and infrastructure proble, init and exit handling
3644 */
1da177e4 3645
fe08bc4b 3646#ifdef CONFIG_THINKPAD_ACPI_DEBUG
a5763f22 3647static const char * __init str_supported(int is_supported)
fe08bc4b 3648{
a5763f22 3649 static char text_unsupported[] __initdata = "not supported";
fe08bc4b 3650
a5763f22 3651 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
fe08bc4b
HMH		 3652}
3653#endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3654
a5763f22 3655static int __init ibm_init(struct ibm_init_struct *iibm)
1da177e4
LT		 3656{
3657 int ret;
a5763f22 3658 struct ibm_struct *ibm = iibm->data;
1da177e4
LT		 3659 struct proc_dir_entry *entry;
3660
a5763f22
HMH		 3661 BUG_ON(ibm == NULL);
3662
3663 INIT_LIST_HEAD(&ibm->all_drivers);
3664
92641177 3665 if (ibm->flags.experimental && !experimental)
1da177e4
LT		 3666 return 0;
3667
fe08bc4b
HMH		 3668 dbg_printk(TPACPI_DBG_INIT,
3669 "probing for %s\n", ibm->name);
3670
a5763f22
HMH		 3671 if (iibm->init) {
3672 ret = iibm->init(iibm);
5fba344c
HMH		 3673 if (ret > 0)
3674 return 0; /* probe failed */
3675 if (ret)
1da177e4 3676 return ret;
a5763f22 3677
92641177 3678 ibm->flags.init_called = 1;
1da177e4
LT		 3679 }
3680
8d376cd6
HMH		 3681 if (ibm->acpi) {
3682 if (ibm->acpi->hid) {
3683 ret = register_tpacpi_subdriver(ibm);
3684 if (ret)
3685 goto err_out;
3686 }
5fba344c 3687
8d376cd6
HMH		 3688 if (ibm->acpi->notify) {
3689 ret = setup_acpi_notify(ibm);
3690 if (ret == -ENODEV) {
3691 printk(IBM_NOTICE "disabling subdriver %s\n",
3692 ibm->name);
3693 ret = 0;
3694 goto err_out;
3695 }
3696 if (ret < 0)
3697 goto err_out;
5fba344c 3698 }
5fba344c
HMH		 3699 }
3700
fe08bc4b
HMH		 3701 dbg_printk(TPACPI_DBG_INIT,
3702 "%s installed\n", ibm->name);
3703
78f81cc4
BD		 3704 if (ibm->read) {
3705 entry = create_proc_entry(ibm->name,
3706 S_IFREG | S_IRUGO | S_IWUSR,
3707 proc_dir);
3708 if (!entry) {
3709 printk(IBM_ERR "unable to create proc entry %s\n",
3710 ibm->name);
5fba344c
HMH		 3711 ret = -ENODEV;
3712 goto err_out;
78f81cc4
BD		 3713 }
3714 entry->owner = THIS_MODULE;
3715 entry->data = ibm;
8d376cd6 3716 entry->read_proc = &dispatch_procfs_read;
78f81cc4 3717 if (ibm->write)
8d376cd6 3718 entry->write_proc = &dispatch_procfs_write;
92641177 3719 ibm->flags.proc_created = 1;
78f81cc4 3720 }
1da177e4 3721
a5763f22
HMH		 3722 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
3723
1da177e4 3724 return 0;
5fba344c
HMH		 3725
3726err_out:
fe08bc4b
HMH		 3727 dbg_printk(TPACPI_DBG_INIT,
3728 "%s: at error exit path with result %d\n",
3729 ibm->name, ret);
3730
5fba344c
HMH		 3731 ibm_exit(ibm);
3732 return (ret < 0)? ret : 0;
1da177e4
LT		 3733}
3734
3735static void ibm_exit(struct ibm_struct *ibm)
3736{
fe08bc4b 3737 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
a5763f22
HMH		 3738
3739 list_del_init(&ibm->all_drivers);
3740
8d376cd6 3741 if (ibm->flags.acpi_notify_installed) {
fe08bc4b
HMH		 3742 dbg_printk(TPACPI_DBG_EXIT,
3743 "%s: acpi_remove_notify_handler\n", ibm->name);
8d376cd6
HMH		 3744 BUG_ON(!ibm->acpi);
3745 acpi_remove_notify_handler(*ibm->acpi->handle,
3746 ibm->acpi->type,
3747 dispatch_acpi_notify);
3748 ibm->flags.acpi_notify_installed = 0;
3749 ibm->flags.acpi_notify_installed = 0;
5fba344c 3750 }
1da177e4 3751
92641177 3752 if (ibm->flags.proc_created) {
fe08bc4b
HMH		 3753 dbg_printk(TPACPI_DBG_EXIT,
3754 "%s: remove_proc_entry\n", ibm->name);
1da177e4 3755 remove_proc_entry(ibm->name, proc_dir);
92641177 3756 ibm->flags.proc_created = 0;
5fba344c 3757 }
1da177e4 3758
8d376cd6 3759 if (ibm->flags.acpi_driver_registered) {
fe08bc4b
HMH		 3760 dbg_printk(TPACPI_DBG_EXIT,
3761 "%s: acpi_bus_unregister_driver\n", ibm->name);
8d376cd6
HMH		 3762 BUG_ON(!ibm->acpi);
3763 acpi_bus_unregister_driver(ibm->acpi->driver);
3764 kfree(ibm->acpi->driver);
3765 ibm->acpi->driver = NULL;
3766 ibm->flags.acpi_driver_registered = 0;
5fba344c
HMH		 3767 }
3768
92641177 3769 if (ibm->flags.init_called && ibm->exit) {
5fba344c 3770 ibm->exit();
92641177 3771 ibm->flags.init_called = 0;
1da177e4 3772 }
a5763f22
HMH		 3773
3774 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
1da177e4
LT		 3775}
3776
56b6aeb0
HMH		 3777/* Probing */
3778
3779static char *ibm_thinkpad_ec_found = NULL;
3780
3781static char* __init check_dmi_for_ec(void)
1da177e4 3782{
56b6aeb0
HMH		 3783 struct dmi_device *dev = NULL;
3784 char ec_fw_string[18];
1da177e4 3785
56b6aeb0
HMH		 3786 /*
3787 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
3788 * X32 or newer, all Z series; Some models must have an
3789 * up-to-date BIOS or they will not be detected.
3790 *
3791 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
3792 */
3793 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
3794 if (sscanf(dev->name,
3795 "IBM ThinkPad Embedded Controller -[%17c",
3796 ec_fw_string) == 1) {
3797 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
3798 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
3799 return kstrdup(ec_fw_string, GFP_KERNEL);
78f81cc4 3800 }
1da177e4 3801 }
56b6aeb0 3802 return NULL;
1da177e4
LT		 3803}
3804
5fba344c
HMH		 3805static int __init probe_for_thinkpad(void)
3806{
3807 int is_thinkpad;
3808
3809 if (acpi_disabled)
3810 return -ENODEV;
3811
3812 /*
3813 * Non-ancient models have better DMI tagging, but very old models
3814 * don't.
3815 */
3816 is_thinkpad = dmi_name_in_vendors("ThinkPad");
3817
3818 /* ec is required because many other handles are relative to it */
8d376cd6 3819 IBM_ACPIHANDLE_INIT(ec);
5fba344c
HMH		 3820 if (!ec_handle) {
3821 if (is_thinkpad)
3822 printk(IBM_ERR
3823 "Not yet supported ThinkPad detected!\n");
3824 return -ENODEV;
3825 }
3826
0dcef77c
HMH		 3827 /*
3828 * Risks a regression on very old machines, but reduces potential
3829 * false positives a damn great deal
3830 */
3831 if (!is_thinkpad)
3832 is_thinkpad = dmi_name_in_vendors("IBM");
3833
3834 if (!is_thinkpad && !force_load)
3835 return -ENODEV;
3836
5fba344c
HMH		 3837 return 0;
3838}
3839
3840
56b6aeb0 3841/* Module init, exit, parameters */
1da177e4 3842
a5763f22
HMH		 3843static struct ibm_init_struct ibms_init[] __initdata = {
3844 {
3845 .init = thinkpad_acpi_driver_init,
3846 .data = &thinkpad_acpi_driver_data,
3847 },
3848 {
3849 .init = hotkey_init,
3850 .data = &hotkey_driver_data,
3851 },
3852 {
3853 .init = bluetooth_init,
3854 .data = &bluetooth_driver_data,
3855 },
3856 {
3857 .init = wan_init,
3858 .data = &wan_driver_data,
3859 },
3860 {
3861 .init = video_init,
3862 .data = &video_driver_data,
3863 },
3864 {
3865 .init = light_init,
3866 .data = &light_driver_data,
3867 },
3868#ifdef CONFIG_THINKPAD_ACPI_DOCK
3869 {
3870 .init = dock_init,
3871 .data = &dock_driver_data[0],
3872 },
3873 {
d94a7f16 3874 .init = dock_init2,
a5763f22
HMH		 3875 .data = &dock_driver_data[1],
3876 },
3877#endif
3878#ifdef CONFIG_THINKPAD_ACPI_BAY
3879 {
3880 .init = bay_init,
3881 .data = &bay_driver_data,
3882 },
3883#endif
3884 {
3885 .init = cmos_init,
3886 .data = &cmos_driver_data,
3887 },
3888 {
3889 .init = led_init,
3890 .data = &led_driver_data,
3891 },
3892 {
3893 .init = beep_init,
3894 .data = &beep_driver_data,
3895 },
3896 {
3897 .init = thermal_init,
3898 .data = &thermal_driver_data,
3899 },
3900 {
3901 .data = &ecdump_driver_data,
3902 },
3903 {
3904 .init = brightness_init,
3905 .data = &brightness_driver_data,
3906 },
3907 {
3908 .data = &volume_driver_data,
3909 },
3910 {
3911 .init = fan_init,
3912 .data = &fan_driver_data,
3913 },
3914};
3915
3945ac36 3916static int __init set_ibm_param(const char *val, struct kernel_param *kp)
1da177e4
LT		 3917{
3918 unsigned int i;
a5763f22 3919 struct ibm_struct *ibm;
1da177e4 3920
a5763f22
HMH		 3921 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3922 ibm = ibms_init[i].data;
3923 BUG_ON(ibm == NULL);
3924
3925 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
3926 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
78f81cc4 3927 return -ENOSPC;
a5763f22
HMH		 3928 strcpy(ibms_init[i].param, val);
3929 strcat(ibms_init[i].param, ",");
78f81cc4
BD		 3930 return 0;
3931 }
a5763f22 3932 }
1da177e4 3933
1da177e4
LT		 3934 return -EINVAL;
3935}
3936
56b6aeb0
HMH		 3937static int experimental;
3938module_param(experimental, int, 0);
3939
132ce091
HMH		 3940static u32 dbg_level;
3941module_param_named(debug, dbg_level, uint, 0);
3942
0dcef77c
HMH		 3943static int force_load;
3944module_param(force_load, int, 0);
3945
ecf2a80a
HMH		 3946static int fan_control_allowed;
3947module_param_named(fan_control, fan_control_allowed, int, 0);
3948
1da177e4
LT		 3949#define IBM_PARAM(feature) \
3950 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
3951
78f81cc4
BD		 3952IBM_PARAM(hotkey);
3953IBM_PARAM(bluetooth);
3954IBM_PARAM(video);
3955IBM_PARAM(light);
85998248 3956#ifdef CONFIG_THINKPAD_ACPI_DOCK
78f81cc4 3957IBM_PARAM(dock);
63e5f248 3958#endif
85998248 3959#ifdef CONFIG_THINKPAD_ACPI_BAY
78f81cc4 3960IBM_PARAM(bay);
85998248 3961#endif /* CONFIG_THINKPAD_ACPI_BAY */
78f81cc4
BD		 3962IBM_PARAM(cmos);
3963IBM_PARAM(led);
3964IBM_PARAM(beep);
3965IBM_PARAM(ecdump);
3966IBM_PARAM(brightness);
3967IBM_PARAM(volume);
3968IBM_PARAM(fan);
3969
1def7115 3970static int __init thinkpad_acpi_module_init(void)
1da177e4
LT		 3971{
3972 int ret, i;
3973
54ae1501 3974 /* Driver-level probe */
5fba344c
HMH		 3975 ret = probe_for_thinkpad();
3976 if (ret)
3977 return ret;
1da177e4 3978
54ae1501 3979 /* Driver initialization */
60eb0b35 3980 ibm_thinkpad_ec_found = check_dmi_for_ec();
8d376cd6
HMH		 3981 IBM_ACPIHANDLE_INIT(ecrd);
3982 IBM_ACPIHANDLE_INIT(ecwr);
1da177e4 3983
8d376cd6 3984 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
1da177e4 3985 if (!proc_dir) {
8d376cd6 3986 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
1def7115 3987 thinkpad_acpi_module_exit();
1da177e4
LT		 3988 return -ENODEV;
3989 }
3990 proc_dir->owner = THIS_MODULE;
78f81cc4 3991
54ae1501
HMH		 3992 ret = platform_driver_register(&tpacpi_pdriver);
3993 if (ret) {
3994 printk(IBM_ERR "unable to register platform driver\n");
3995 thinkpad_acpi_module_exit();
3996 return ret;
3997 }
176750d6
HMH		 3998 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
3999 if (ret) {
4000 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4001 thinkpad_acpi_module_exit();
4002 return ret;
4003 }
4004
54ae1501
HMH		 4005
4006 /* Device initialization */
4007 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4008 NULL, 0);
4009 if (IS_ERR(tpacpi_pdev)) {
4010 ret = PTR_ERR(tpacpi_pdev);
4011 tpacpi_pdev = NULL;
4012 printk(IBM_ERR "unable to register platform device\n");
4013 thinkpad_acpi_module_exit();
4014 return ret;
4015 }
4016 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4017 if (IS_ERR(tpacpi_hwmon)) {
4018 ret = PTR_ERR(tpacpi_hwmon);
4019 tpacpi_hwmon = NULL;
4020 printk(IBM_ERR "unable to register hwmon device\n");
4021 thinkpad_acpi_module_exit();
4022 return ret;
4023 }
a5763f22
HMH		 4024 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4025 ret = ibm_init(&ibms_init[i]);
4026 if (ret >= 0 && *ibms_init[i].param)
4027 ret = ibms_init[i].data->write(ibms_init[i].param);
1da177e4 4028 if (ret < 0) {
1def7115 4029 thinkpad_acpi_module_exit();
1da177e4
LT		 4030 return ret;
4031 }
4032 }
4033
4034 return 0;
4035}
4036
1def7115 4037static void thinkpad_acpi_module_exit(void)
56b6aeb0 4038{
a5763f22
HMH		 4039 struct ibm_struct *ibm, *itmp;
4040
4041 list_for_each_entry_safe_reverse(ibm, itmp,
4042 &tpacpi_all_drivers,
4043 all_drivers) {
4044 ibm_exit(ibm);
4045 }
56b6aeb0 4046
a5763f22 4047 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
56b6aeb0 4048
54ae1501
HMH		 4049 if (tpacpi_hwmon)
4050 hwmon_device_unregister(tpacpi_hwmon);
4051
4052 if (tpacpi_pdev)
4053 platform_device_unregister(tpacpi_pdev);
4054
176750d6 4055 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
54ae1501
HMH		 4056 platform_driver_unregister(&tpacpi_pdriver);
4057
56b6aeb0 4058 if (proc_dir)
8d376cd6 4059 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
56b6aeb0 4060
8d376cd6 4061 kfree(ibm_thinkpad_ec_found);
56b6aeb0
HMH		 4062}
4063
1def7115
HMH		 4064module_init(thinkpad_acpi_module_init);
4065module_exit(thinkpad_acpi_module_exit);
Linux kernel - Deliverables
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