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[ARM] Add fallocate syscall entry
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / misc / thinkpad_acpi.c
blob6c0b2f0a51ab5c606c22ca5aec1a9e41a7468d3a
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define IBM_VERSION "0.16"
25 #define TPACPI_SYSFS_VERSION 0x010000
26
27 /*
28 * Changelog:
29 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
30 * drivers/misc.
31 *
32 * 2006-11-22 0.13 new maintainer
33 * changelog now lives in git commit history, and will
34 * not be updated further in-file.
35 *
36 * 2005-08-17 0.12 fix compilation on 2.6.13-rc kernels
37 * 2005-03-17 0.11 support for 600e, 770x
38 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
39 * support for 770e, G41
40 * G40 and G41 don't have a thinklight
41 * temperatures no longer experimental
42 * experimental brightness control
43 * experimental volume control
44 * experimental fan enable/disable
45 * 2005-01-16 0.10 fix module loading on R30, R31
46 * 2005-01-16 0.9 support for 570, R30, R31
47 * ultrabay support on A22p, A3x
48 * limit arg for cmos, led, beep, drop experimental status
49 * more capable led control on A21e, A22p, T20-22, X20
50 * experimental temperatures and fan speed
51 * experimental embedded controller register dump
52 * mark more functions as __init, drop incorrect __exit
53 * use MODULE_VERSION
54 * thanks to Henrik Brix Andersen <brix@gentoo.org>
55 * fix parameter passing on module loading
56 * thanks to Rusty Russell <rusty@rustcorp.com.au>
57 * thanks to Jim Radford <radford@blackbean.org>
58 * 2004-11-08 0.8 fix init error case, don't return from a macro
59 * thanks to Chris Wright <chrisw@osdl.org>
60 * 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
61 * fix led control on A21e
62 * 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
63 * 2004-10-18 0.5 thinklight support on A21e, G40, R32, T20, T21, X20
64 * proc file format changed
65 * video_switch command
66 * experimental cmos control
67 * experimental led control
68 * experimental acpi sounds
69 * 2004-09-16 0.4 support for module parameters
70 * hotkey mask can be prefixed by 0x
71 * video output switching
72 * video expansion control
73 * ultrabay eject support
74 * removed lcd brightness/on/off control, didn't work
75 * 2004-08-17 0.3 support for R40
76 * lcd off, brightness control
77 * thinklight on/off
78 * 2004-08-14 0.2 support for T series, X20
79 * bluetooth enable/disable
80 * hotkey events disabled by default
81 * removed fan control, currently useless
82 * 2004-08-09 0.1 initial release, support for X series
83 */
84
85 #include "thinkpad_acpi.h"
86
87 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
88 MODULE_DESCRIPTION(IBM_DESC);
89 MODULE_VERSION(IBM_VERSION);
90 MODULE_LICENSE("GPL");
91
92 /* Please remove this in year 2009 */
93 MODULE_ALIAS("ibm_acpi");
94
95 /*
96 * DMI matching for module autoloading
97 *
98 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
99 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
100 *
101 * Only models listed in thinkwiki will be supported, so add yours
102 * if it is not there yet.
103 */
104 #define IBM_BIOS_MODULE_ALIAS(__type) \
105 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
106
107 /* Non-ancient thinkpads */
108 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
109 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
110
111 /* Ancient thinkpad BIOSes have to be identified by
112 * BIOS type or model number, and there are far less
113 * BIOS types than model numbers... */
114 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
115 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
116 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
117
118 #define __unused __attribute__ ((unused))
119
120 /****************************************************************************
121 ****************************************************************************
122 *
123 * ACPI Helpers and device model
124 *
125 ****************************************************************************
126 ****************************************************************************/
127
128 /*************************************************************************
129 * ACPI basic handles
130 */
131
132 static acpi_handle root_handle;
133
134 #define IBM_HANDLE(object, parent, paths...) \
135 static acpi_handle object##_handle; \
136 static acpi_handle *object##_parent = &parent##_handle; \
137 static char *object##_path; \
138 static char *object##_paths[] = { paths }
139
140 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
141 "\\_SB.PCI.ISA.EC", /* 570 */
142 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
143 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
144 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
145 "\\_SB.PCI0.ICH3.EC0", /* R31 */
146 "\\_SB.PCI0.LPC.EC", /* all others */
147 );
148
149 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
150 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
151
152
153 /*************************************************************************
154 * Misc ACPI handles
155 */
156
157 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
158 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
159 "\\CMS", /* R40, R40e */
160 ); /* all others */
161
162 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
163 "^HKEY", /* R30, R31 */
164 "HKEY", /* all others */
165 ); /* 570 */
166
167
168 /*************************************************************************
169 * ACPI helpers
170 */
171
172 static int acpi_evalf(acpi_handle handle,
173 void *res, char *method, char *fmt, ...)
174 {
175 char *fmt0 = fmt;
176 struct acpi_object_list params;
177 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
178 struct acpi_buffer result, *resultp;
179 union acpi_object out_obj;
180 acpi_status status;
181 va_list ap;
182 char res_type;
183 int success;
184 int quiet;
185
186 if (!*fmt) {
187 printk(IBM_ERR "acpi_evalf() called with empty format\n");
188 return 0;
189 }
190
191 if (*fmt == 'q') {
192 quiet = 1;
193 fmt++;
194 } else
195 quiet = 0;
196
197 res_type = *(fmt++);
198
199 params.count = 0;
200 params.pointer = &in_objs[0];
201
202 va_start(ap, fmt);
203 while (*fmt) {
204 char c = *(fmt++);
205 switch (c) {
206 case 'd': /* int */
207 in_objs[params.count].integer.value = va_arg(ap, int);
208 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
209 break;
210 /* add more types as needed */
211 default:
212 printk(IBM_ERR "acpi_evalf() called "
213 "with invalid format character '%c'\n", c);
214 return 0;
215 }
216 }
217 va_end(ap);
218
219 if (res_type != 'v') {
220 result.length = sizeof(out_obj);
221 result.pointer = &out_obj;
222 resultp = &result;
223 } else
224 resultp = NULL;
225
226 status = acpi_evaluate_object(handle, method, &params, resultp);
227
228 switch (res_type) {
229 case 'd': /* int */
230 if (res)
231 *(int *)res = out_obj.integer.value;
232 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
233 break;
234 case 'v': /* void */
235 success = status == AE_OK;
236 break;
237 /* add more types as needed */
238 default:
239 printk(IBM_ERR "acpi_evalf() called "
240 "with invalid format character '%c'\n", res_type);
241 return 0;
242 }
243
244 if (!success && !quiet)
245 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
246 method, fmt0, status);
247
248 return success;
249 }
250
251 static void __unused acpi_print_int(acpi_handle handle, char *method)
252 {
253 int i;
254
255 if (acpi_evalf(handle, &i, method, "d"))
256 printk(IBM_INFO "%s = 0x%x\n", method, i);
257 else
258 printk(IBM_ERR "error calling %s\n", method);
259 }
260
261 static int acpi_ec_read(int i, u8 * p)
262 {
263 int v;
264
265 if (ecrd_handle) {
266 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
267 return 0;
268 *p = v;
269 } else {
270 if (ec_read(i, p) < 0)
271 return 0;
272 }
273
274 return 1;
275 }
276
277 static int acpi_ec_write(int i, u8 v)
278 {
279 if (ecwr_handle) {
280 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
281 return 0;
282 } else {
283 if (ec_write(i, v) < 0)
284 return 0;
285 }
286
287 return 1;
288 }
289
290 static int _sta(acpi_handle handle)
291 {
292 int status;
293
294 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
295 status = 0;
296
297 return status;
298 }
299
300 static int issue_thinkpad_cmos_command(int cmos_cmd)
301 {
302 if (!cmos_handle)
303 return -ENXIO;
304
305 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
306 return -EIO;
307
308 return 0;
309 }
310
311 /*************************************************************************
312 * ACPI device model
313 */
314
315 static void drv_acpi_handle_init(char *name,
316 acpi_handle *handle, acpi_handle parent,
317 char **paths, int num_paths, char **path)
318 {
319 int i;
320 acpi_status status;
321
322 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
323 name);
324
325 for (i = 0; i < num_paths; i++) {
326 status = acpi_get_handle(parent, paths[i], handle);
327 if (ACPI_SUCCESS(status)) {
328 *path = paths[i];
329 dbg_printk(TPACPI_DBG_INIT,
330 "Found ACPI handle %s for %s\n",
331 *path, name);
332 return;
333 }
334 }
335
336 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
337 name);
338 *handle = NULL;
339 }
340
341 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
342 {
343 struct ibm_struct *ibm = data;
344
345 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
346 return;
347
348 ibm->acpi->notify(ibm, event);
349 }
350
351 static int __init setup_acpi_notify(struct ibm_struct *ibm)
352 {
353 acpi_status status;
354 int rc;
355
356 BUG_ON(!ibm->acpi);
357
358 if (!*ibm->acpi->handle)
359 return 0;
360
361 vdbg_printk(TPACPI_DBG_INIT,
362 "setting up ACPI notify for %s\n", ibm->name);
363
364 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
365 if (rc < 0) {
366 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
367 ibm->name, rc);
368 return -ENODEV;
369 }
370
371 acpi_driver_data(ibm->acpi->device) = ibm;
372 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
373 IBM_ACPI_EVENT_PREFIX,
374 ibm->name);
375
376 status = acpi_install_notify_handler(*ibm->acpi->handle,
377 ibm->acpi->type, dispatch_acpi_notify, ibm);
378 if (ACPI_FAILURE(status)) {
379 if (status == AE_ALREADY_EXISTS) {
380 printk(IBM_NOTICE "another device driver is already handling %s events\n",
381 ibm->name);
382 } else {
383 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
384 ibm->name, status);
385 }
386 return -ENODEV;
387 }
388 ibm->flags.acpi_notify_installed = 1;
389 return 0;
390 }
391
392 static int __init tpacpi_device_add(struct acpi_device *device)
393 {
394 return 0;
395 }
396
397 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
398 {
399 int rc;
400
401 dbg_printk(TPACPI_DBG_INIT,
402 "registering %s as an ACPI driver\n", ibm->name);
403
404 BUG_ON(!ibm->acpi);
405
406 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
407 if (!ibm->acpi->driver) {
408 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
409 return -ENOMEM;
410 }
411
412 sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
413 ibm->acpi->driver->ids = ibm->acpi->hid;
414
415 ibm->acpi->driver->ops.add = &tpacpi_device_add;
416
417 rc = acpi_bus_register_driver(ibm->acpi->driver);
418 if (rc < 0) {
419 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
420 ibm->name, rc);
421 kfree(ibm->acpi->driver);
422 ibm->acpi->driver = NULL;
423 } else if (!rc)
424 ibm->flags.acpi_driver_registered = 1;
425
426 return rc;
427 }
428
429
430 /****************************************************************************
431 ****************************************************************************
432 *
433 * Procfs Helpers
434 *
435 ****************************************************************************
436 ****************************************************************************/
437
438 static int dispatch_procfs_read(char *page, char **start, off_t off,
439 int count, int *eof, void *data)
440 {
441 struct ibm_struct *ibm = data;
442 int len;
443
444 if (!ibm || !ibm->read)
445 return -EINVAL;
446
447 len = ibm->read(page);
448 if (len < 0)
449 return len;
450
451 if (len <= off + count)
452 *eof = 1;
453 *start = page + off;
454 len -= off;
455 if (len > count)
456 len = count;
457 if (len < 0)
458 len = 0;
459
460 return len;
461 }
462
463 static int dispatch_procfs_write(struct file *file,
464 const char __user * userbuf,
465 unsigned long count, void *data)
466 {
467 struct ibm_struct *ibm = data;
468 char *kernbuf;
469 int ret;
470
471 if (!ibm || !ibm->write)
472 return -EINVAL;
473
474 kernbuf = kmalloc(count + 2, GFP_KERNEL);
475 if (!kernbuf)
476 return -ENOMEM;
477
478 if (copy_from_user(kernbuf, userbuf, count)) {
479 kfree(kernbuf);
480 return -EFAULT;
481 }
482
483 kernbuf[count] = 0;
484 strcat(kernbuf, ",");
485 ret = ibm->write(kernbuf);
486 if (ret == 0)
487 ret = count;
488
489 kfree(kernbuf);
490
491 return ret;
492 }
493
494 static char *next_cmd(char **cmds)
495 {
496 char *start = *cmds;
497 char *end;
498
499 while ((end = strchr(start, ',')) && end == start)
500 start = end + 1;
501
502 if (!end)
503 return NULL;
504
505 *end = 0;
506 *cmds = end + 1;
507 return start;
508 }
509
510
511 /****************************************************************************
512 ****************************************************************************
513 *
514 * Device model: input, hwmon and platform
515 *
516 ****************************************************************************
517 ****************************************************************************/
518
519 static struct platform_device *tpacpi_pdev;
520 static struct class_device *tpacpi_hwmon;
521 static struct input_dev *tpacpi_inputdev;
522
523
524 static int tpacpi_resume_handler(struct platform_device *pdev)
525 {
526 struct ibm_struct *ibm, *itmp;
527
528 list_for_each_entry_safe(ibm, itmp,
529 &tpacpi_all_drivers,
530 all_drivers) {
531 if (ibm->resume)
532 (ibm->resume)();
533 }
534
535 return 0;
536 }
537
538 static struct platform_driver tpacpi_pdriver = {
539 .driver = {
540 .name = IBM_DRVR_NAME,
541 .owner = THIS_MODULE,
542 },
543 .resume = tpacpi_resume_handler,
544 };
545
546
547 /*************************************************************************
548 * thinkpad-acpi driver attributes
549 */
550
551 /* interface_version --------------------------------------------------- */
552 static ssize_t tpacpi_driver_interface_version_show(
553 struct device_driver *drv,
554 char *buf)
555 {
556 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
557 }
558
559 static DRIVER_ATTR(interface_version, S_IRUGO,
560 tpacpi_driver_interface_version_show, NULL);
561
562 /* debug_level --------------------------------------------------------- */
563 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
564 char *buf)
565 {
566 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
567 }
568
569 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
570 const char *buf, size_t count)
571 {
572 unsigned long t;
573
574 if (parse_strtoul(buf, 0xffff, &t))
575 return -EINVAL;
576
577 dbg_level = t;
578
579 return count;
580 }
581
582 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
583 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
584
585 /* version ------------------------------------------------------------- */
586 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
587 char *buf)
588 {
589 return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
590 }
591
592 static DRIVER_ATTR(version, S_IRUGO,
593 tpacpi_driver_version_show, NULL);
594
595 /* --------------------------------------------------------------------- */
596
597 static struct driver_attribute* tpacpi_driver_attributes[] = {
598 &driver_attr_debug_level, &driver_attr_version,
599 &driver_attr_interface_version,
600 };
601
602 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
603 {
604 int i, res;
605
606 i = 0;
607 res = 0;
608 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
609 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
610 i++;
611 }
612
613 return res;
614 }
615
616 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
617 {
618 int i;
619
620 for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
621 driver_remove_file(drv, tpacpi_driver_attributes[i]);
622 }
623
624 /*************************************************************************
625 * sysfs support helpers
626 */
627
628 struct attribute_set_obj {
629 struct attribute_set s;
630 struct attribute *a;
631 } __attribute__((packed));
632
633 static struct attribute_set *create_attr_set(unsigned int max_members,
634 const char* name)
635 {
636 struct attribute_set_obj *sobj;
637
638 if (max_members == 0)
639 return NULL;
640
641 /* Allocates space for implicit NULL at the end too */
642 sobj = kzalloc(sizeof(struct attribute_set_obj) +
643 max_members * sizeof(struct attribute *),
644 GFP_KERNEL);
645 if (!sobj)
646 return NULL;
647 sobj->s.max_members = max_members;
648 sobj->s.group.attrs = &sobj->a;
649 sobj->s.group.name = name;
650
651 return &sobj->s;
652 }
653
654 /* not multi-threaded safe, use it in a single thread per set */
655 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
656 {
657 if (!s || !attr)
658 return -EINVAL;
659
660 if (s->members >= s->max_members)
661 return -ENOMEM;
662
663 s->group.attrs[s->members] = attr;
664 s->members++;
665
666 return 0;
667 }
668
669 static int add_many_to_attr_set(struct attribute_set* s,
670 struct attribute **attr,
671 unsigned int count)
672 {
673 int i, res;
674
675 for (i = 0; i < count; i++) {
676 res = add_to_attr_set(s, attr[i]);
677 if (res)
678 return res;
679 }
680
681 return 0;
682 }
683
684 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
685 {
686 sysfs_remove_group(kobj, &s->group);
687 destroy_attr_set(s);
688 }
689
690 static int parse_strtoul(const char *buf,
691 unsigned long max, unsigned long *value)
692 {
693 char *endp;
694
695 *value = simple_strtoul(buf, &endp, 0);
696 while (*endp && isspace(*endp))
697 endp++;
698 if (*endp || *value > max)
699 return -EINVAL;
700
701 return 0;
702 }
703
704 /****************************************************************************
705 ****************************************************************************
706 *
707 * Subdrivers
708 *
709 ****************************************************************************
710 ****************************************************************************/
711
712 /*************************************************************************
713 * thinkpad-acpi init subdriver
714 */
715
716 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
717 {
718 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
719 printk(IBM_INFO "%s\n", IBM_URL);
720
721 printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
722 (thinkpad_id.bios_version_str) ?
723 thinkpad_id.bios_version_str : "unknown",
724 (thinkpad_id.ec_version_str) ?
725 thinkpad_id.ec_version_str : "unknown");
726
727 if (thinkpad_id.vendor && thinkpad_id.model_str)
728 printk(IBM_INFO "%s %s\n",
729 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
730 "IBM" : ((thinkpad_id.vendor ==
731 PCI_VENDOR_ID_LENOVO) ?
732 "Lenovo" : "Unknown vendor"),
733 thinkpad_id.model_str);
734
735 return 0;
736 }
737
738 static int thinkpad_acpi_driver_read(char *p)
739 {
740 int len = 0;
741
742 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
743 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
744
745 return len;
746 }
747
748 static struct ibm_struct thinkpad_acpi_driver_data = {
749 .name = "driver",
750 .read = thinkpad_acpi_driver_read,
751 };
752
753 /*************************************************************************
754 * Hotkey subdriver
755 */
756
757 static int hotkey_orig_status;
758 static u32 hotkey_orig_mask;
759 static u32 hotkey_all_mask;
760 static u32 hotkey_reserved_mask;
761
762 static u16 *hotkey_keycode_map;
763
764 static struct attribute_set *hotkey_dev_attributes;
765
766 static int hotkey_get_wlsw(int *status)
767 {
768 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
769 return -EIO;
770 return 0;
771 }
772
773 /* sysfs hotkey enable ------------------------------------------------- */
774 static ssize_t hotkey_enable_show(struct device *dev,
775 struct device_attribute *attr,
776 char *buf)
777 {
778 int res, status;
779 u32 mask;
780
781 res = hotkey_get(&status, &mask);
782 if (res)
783 return res;
784
785 return snprintf(buf, PAGE_SIZE, "%d\n", status);
786 }
787
788 static ssize_t hotkey_enable_store(struct device *dev,
789 struct device_attribute *attr,
790 const char *buf, size_t count)
791 {
792 unsigned long t;
793 int res, status;
794 u32 mask;
795
796 if (parse_strtoul(buf, 1, &t))
797 return -EINVAL;
798
799 res = hotkey_get(&status, &mask);
800 if (!res)
801 res = hotkey_set(t, mask);
802
803 return (res) ? res : count;
804 }
805
806 static struct device_attribute dev_attr_hotkey_enable =
807 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
808 hotkey_enable_show, hotkey_enable_store);
809
810 /* sysfs hotkey mask --------------------------------------------------- */
811 static ssize_t hotkey_mask_show(struct device *dev,
812 struct device_attribute *attr,
813 char *buf)
814 {
815 int res, status;
816 u32 mask;
817
818 res = hotkey_get(&status, &mask);
819 if (res)
820 return res;
821
822 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
823 }
824
825 static ssize_t hotkey_mask_store(struct device *dev,
826 struct device_attribute *attr,
827 const char *buf, size_t count)
828 {
829 unsigned long t;
830 int res, status;
831 u32 mask;
832
833 if (parse_strtoul(buf, 0xffffffffUL, &t))
834 return -EINVAL;
835
836 res = hotkey_get(&status, &mask);
837 if (!res)
838 hotkey_set(status, t);
839
840 return (res) ? res : count;
841 }
842
843 static struct device_attribute dev_attr_hotkey_mask =
844 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
845 hotkey_mask_show, hotkey_mask_store);
846
847 /* sysfs hotkey bios_enabled ------------------------------------------- */
848 static ssize_t hotkey_bios_enabled_show(struct device *dev,
849 struct device_attribute *attr,
850 char *buf)
851 {
852 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
853 }
854
855 static struct device_attribute dev_attr_hotkey_bios_enabled =
856 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
857
858 /* sysfs hotkey bios_mask ---------------------------------------------- */
859 static ssize_t hotkey_bios_mask_show(struct device *dev,
860 struct device_attribute *attr,
861 char *buf)
862 {
863 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
864 }
865
866 static struct device_attribute dev_attr_hotkey_bios_mask =
867 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
868
869 /* sysfs hotkey all_mask ----------------------------------------------- */
870 static ssize_t hotkey_all_mask_show(struct device *dev,
871 struct device_attribute *attr,
872 char *buf)
873 {
874 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
875 }
876
877 static struct device_attribute dev_attr_hotkey_all_mask =
878 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
879
880 /* sysfs hotkey recommended_mask --------------------------------------- */
881 static ssize_t hotkey_recommended_mask_show(struct device *dev,
882 struct device_attribute *attr,
883 char *buf)
884 {
885 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
886 hotkey_all_mask & ~hotkey_reserved_mask);
887 }
888
889 static struct device_attribute dev_attr_hotkey_recommended_mask =
890 __ATTR(hotkey_recommended_mask, S_IRUGO,
891 hotkey_recommended_mask_show, NULL);
892
893 /* sysfs hotkey radio_sw ----------------------------------------------- */
894 static ssize_t hotkey_radio_sw_show(struct device *dev,
895 struct device_attribute *attr,
896 char *buf)
897 {
898 int res, s;
899 res = hotkey_get_wlsw(&s);
900 if (res < 0)
901 return res;
902
903 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
904 }
905
906 static struct device_attribute dev_attr_hotkey_radio_sw =
907 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
908
909 /* sysfs hotkey report_mode -------------------------------------------- */
910 static ssize_t hotkey_report_mode_show(struct device *dev,
911 struct device_attribute *attr,
912 char *buf)
913 {
914 return snprintf(buf, PAGE_SIZE, "%d\n",
915 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
916 }
917
918 static struct device_attribute dev_attr_hotkey_report_mode =
919 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
920
921 /* --------------------------------------------------------------------- */
922
923 static struct attribute *hotkey_attributes[] __initdata = {
924 &dev_attr_hotkey_enable.attr,
925 &dev_attr_hotkey_report_mode.attr,
926 };
927
928 static struct attribute *hotkey_mask_attributes[] __initdata = {
929 &dev_attr_hotkey_mask.attr,
930 &dev_attr_hotkey_bios_enabled.attr,
931 &dev_attr_hotkey_bios_mask.attr,
932 &dev_attr_hotkey_all_mask.attr,
933 &dev_attr_hotkey_recommended_mask.attr,
934 };
935
936 static int __init hotkey_init(struct ibm_init_struct *iibm)
937 {
938
939 static u16 ibm_keycode_map[] __initdata = {
940 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
941 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP,
942 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
943 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
944 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
945 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
946 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
947 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
948 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
949 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
950 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
951 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
952 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
953 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
954 KEY_RESERVED, /* 0x14: VOLUME UP */
955 KEY_RESERVED, /* 0x15: VOLUME DOWN */
956 KEY_RESERVED, /* 0x16: MUTE */
957 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
958 /* (assignments unknown, please report if found) */
959 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
960 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
961 };
962 static u16 lenovo_keycode_map[] __initdata = {
963 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
964 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP,
965 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
966 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
967 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
968 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
969 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
970 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
971 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */
972 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
973 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */
974 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
975 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
976 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
977 KEY_RESERVED, /* 0x14: VOLUME UP */
978 KEY_RESERVED, /* 0x15: VOLUME DOWN */
979 KEY_RESERVED, /* 0x16: MUTE */
980 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
981 /* (assignments unknown, please report if found) */
982 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
983 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
984 };
985
986 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map)
987 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map)
988 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0])
989
990 int res, i;
991 int status;
992
993 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
994
995 BUG_ON(!tpacpi_inputdev);
996
997 IBM_ACPIHANDLE_INIT(hkey);
998 mutex_init(&hotkey_mutex);
999
1000 /* hotkey not supported on 570 */
1001 tp_features.hotkey = hkey_handle != NULL;
1002
1003 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1004 str_supported(tp_features.hotkey));
1005
1006 if (tp_features.hotkey) {
1007 hotkey_dev_attributes = create_attr_set(8, NULL);
1008 if (!hotkey_dev_attributes)
1009 return -ENOMEM;
1010 res = add_many_to_attr_set(hotkey_dev_attributes,
1011 hotkey_attributes,
1012 ARRAY_SIZE(hotkey_attributes));
1013 if (res)
1014 return res;
1015
1016 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1017 A30, R30, R31, T20-22, X20-21, X22-24 */
1018 tp_features.hotkey_mask =
1019 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
1020
1021 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1022 str_supported(tp_features.hotkey_mask));
1023
1024 if (tp_features.hotkey_mask) {
1025 /* MHKA available in A31, R40, R40e, T4x, X31, and later */
1026 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1027 "MHKA", "qd"))
1028 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
1029 }
1030
1031 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
1032 if (!res && tp_features.hotkey_mask) {
1033 res = add_many_to_attr_set(hotkey_dev_attributes,
1034 hotkey_mask_attributes,
1035 ARRAY_SIZE(hotkey_mask_attributes));
1036 }
1037
1038 /* Not all thinkpads have a hardware radio switch */
1039 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1040 tp_features.hotkey_wlsw = 1;
1041 printk(IBM_INFO
1042 "radio switch found; radios are %s\n",
1043 enabled(status, 0));
1044 res = add_to_attr_set(hotkey_dev_attributes,
1045 &dev_attr_hotkey_radio_sw.attr);
1046 }
1047
1048 if (!res)
1049 res = register_attr_set_with_sysfs(
1050 hotkey_dev_attributes,
1051 &tpacpi_pdev->dev.kobj);
1052 if (res)
1053 return res;
1054
1055 /* Set up key map */
1056
1057 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1058 GFP_KERNEL);
1059 if (!hotkey_keycode_map) {
1060 printk(IBM_ERR "failed to allocate memory for key map\n");
1061 return -ENOMEM;
1062 }
1063
1064 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1065 dbg_printk(TPACPI_DBG_INIT,
1066 "using Lenovo default hot key map\n");
1067 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1068 TPACPI_HOTKEY_MAP_SIZE);
1069 } else {
1070 dbg_printk(TPACPI_DBG_INIT,
1071 "using IBM default hot key map\n");
1072 memcpy(hotkey_keycode_map, &ibm_keycode_map,
1073 TPACPI_HOTKEY_MAP_SIZE);
1074 }
1075
1076 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1077 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1078 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1079 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1080 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1081 tpacpi_inputdev->keycode = hotkey_keycode_map;
1082 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1083 if (hotkey_keycode_map[i] != KEY_RESERVED) {
1084 set_bit(hotkey_keycode_map[i],
1085 tpacpi_inputdev->keybit);
1086 } else {
1087 if (i < sizeof(hotkey_reserved_mask)*8)
1088 hotkey_reserved_mask |= 1 << i;
1089 }
1090 }
1091
1092 if (tp_features.hotkey_wlsw) {
1093 set_bit(EV_SW, tpacpi_inputdev->evbit);
1094 set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1095 }
1096
1097 dbg_printk(TPACPI_DBG_INIT,
1098 "enabling hot key handling\n");
1099 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1100 | hotkey_orig_mask);
1101 if (res)
1102 return res;
1103
1104 dbg_printk(TPACPI_DBG_INIT,
1105 "legacy hot key reporting over procfs %s\n",
1106 (hotkey_report_mode < 2) ?
1107 "enabled" : "disabled");
1108 }
1109
1110 return (tp_features.hotkey)? 0 : 1;
1111 }
1112
1113 static void hotkey_exit(void)
1114 {
1115 int res;
1116
1117 if (tp_features.hotkey) {
1118 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1119 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1120 if (res)
1121 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1122 }
1123
1124 if (hotkey_dev_attributes) {
1125 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1126 hotkey_dev_attributes = NULL;
1127 }
1128 }
1129
1130 static void tpacpi_input_send_key(unsigned int scancode,
1131 unsigned int keycode)
1132 {
1133 if (keycode != KEY_RESERVED) {
1134 input_report_key(tpacpi_inputdev, keycode, 1);
1135 if (keycode == KEY_UNKNOWN)
1136 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1137 scancode);
1138 input_sync(tpacpi_inputdev);
1139
1140 input_report_key(tpacpi_inputdev, keycode, 0);
1141 if (keycode == KEY_UNKNOWN)
1142 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1143 scancode);
1144 input_sync(tpacpi_inputdev);
1145 }
1146 }
1147
1148 static void tpacpi_input_send_radiosw(void)
1149 {
1150 int wlsw;
1151
1152 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw))
1153 input_report_switch(tpacpi_inputdev,
1154 SW_RADIO, !!wlsw);
1155 }
1156
1157 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1158 {
1159 u32 hkey;
1160 unsigned int keycode, scancode;
1161 int send_acpi_ev = 0;
1162
1163 if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1164 switch (hkey >> 12) {
1165 case 1:
1166 /* 0x1000-0x1FFF: key presses */
1167 scancode = hkey & 0xfff;
1168 if (scancode > 0 && scancode < 0x21) {
1169 scancode--;
1170 keycode = hotkey_keycode_map[scancode];
1171 tpacpi_input_send_key(scancode, keycode);
1172 } else {
1173 printk(IBM_ERR
1174 "hotkey 0x%04x out of range for keyboard map\n",
1175 hkey);
1176 send_acpi_ev = 1;
1177 }
1178 break;
1179 case 5:
1180 /* 0x5000-0x5FFF: LID */
1181 /* we don't handle it through this path, just
1182 * eat up known LID events */
1183 if (hkey != 0x5001 && hkey != 0x5002) {
1184 printk(IBM_ERR
1185 "unknown LID-related hotkey event: 0x%04x\n",
1186 hkey);
1187 send_acpi_ev = 1;
1188 }
1189 break;
1190 case 7:
1191 /* 0x7000-0x7FFF: misc */
1192 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1193 tpacpi_input_send_radiosw();
1194 break;
1195 }
1196 /* fallthrough to default */
1197 default:
1198 /* case 2: dock-related */
1199 /* 0x2305 - T43 waking up due to bay lever eject while aslept */
1200 /* case 3: ultra-bay related. maybe bay in dock? */
1201 /* 0x3003 - T43 after wake up by bay lever eject (0x2305) */
1202 printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
1203 send_acpi_ev = 1;
1204 }
1205 } else {
1206 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
1207 hkey = 0;
1208 send_acpi_ev = 1;
1209 }
1210
1211 /* Legacy events */
1212 if (send_acpi_ev || hotkey_report_mode < 2)
1213 acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
1214
1215 /* netlink events */
1216 if (send_acpi_ev) {
1217 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1218 ibm->acpi->device->dev.bus_id,
1219 event, hkey);
1220 }
1221 }
1222
1223 static void hotkey_resume(void)
1224 {
1225 tpacpi_input_send_radiosw();
1226 }
1227
1228 /*
1229 * Call with hotkey_mutex held
1230 */
1231 static int hotkey_get(int *status, u32 *mask)
1232 {
1233 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1234 return -EIO;
1235
1236 if (tp_features.hotkey_mask)
1237 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1238 return -EIO;
1239
1240 return 0;
1241 }
1242
1243 /*
1244 * Call with hotkey_mutex held
1245 */
1246 static int hotkey_set(int status, u32 mask)
1247 {
1248 int i;
1249
1250 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1251 return -EIO;
1252
1253 if (tp_features.hotkey_mask)
1254 for (i = 0; i < 32; i++) {
1255 int bit = ((1 << i) & mask) != 0;
1256 if (!acpi_evalf(hkey_handle,
1257 NULL, "MHKM", "vdd", i + 1, bit))
1258 return -EIO;
1259 }
1260
1261 return 0;
1262 }
1263
1264 /* procfs -------------------------------------------------------------- */
1265 static int hotkey_read(char *p)
1266 {
1267 int res, status;
1268 u32 mask;
1269 int len = 0;
1270
1271 if (!tp_features.hotkey) {
1272 len += sprintf(p + len, "status:\t\tnot supported\n");
1273 return len;
1274 }
1275
1276 res = mutex_lock_interruptible(&hotkey_mutex);
1277 if (res < 0)
1278 return res;
1279 res = hotkey_get(&status, &mask);
1280 mutex_unlock(&hotkey_mutex);
1281 if (res)
1282 return res;
1283
1284 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1285 if (tp_features.hotkey_mask) {
1286 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1287 len += sprintf(p + len,
1288 "commands:\tenable, disable, reset, <mask>\n");
1289 } else {
1290 len += sprintf(p + len, "mask:\t\tnot supported\n");
1291 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1292 }
1293
1294 return len;
1295 }
1296
1297 static int hotkey_write(char *buf)
1298 {
1299 int res, status;
1300 u32 mask;
1301 char *cmd;
1302 int do_cmd = 0;
1303
1304 if (!tp_features.hotkey)
1305 return -ENODEV;
1306
1307 res = mutex_lock_interruptible(&hotkey_mutex);
1308 if (res < 0)
1309 return res;
1310
1311 res = hotkey_get(&status, &mask);
1312 if (res)
1313 goto errexit;
1314
1315 res = 0;
1316 while ((cmd = next_cmd(&buf))) {
1317 if (strlencmp(cmd, "enable") == 0) {
1318 status = 1;
1319 } else if (strlencmp(cmd, "disable") == 0) {
1320 status = 0;
1321 } else if (strlencmp(cmd, "reset") == 0) {
1322 status = hotkey_orig_status;
1323 mask = hotkey_orig_mask;
1324 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1325 /* mask set */
1326 } else if (sscanf(cmd, "%x", &mask) == 1) {
1327 /* mask set */
1328 } else {
1329 res = -EINVAL;
1330 goto errexit;
1331 }
1332 do_cmd = 1;
1333 }
1334
1335 if (do_cmd)
1336 res = hotkey_set(status, mask);
1337
1338 errexit:
1339 mutex_unlock(&hotkey_mutex);
1340 return res;
1341 }
1342
1343 static const struct acpi_device_id ibm_htk_device_ids[] = {
1344 {IBM_HKEY_HID, 0},
1345 {"", 0},
1346 };
1347
1348 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1349 .hid = ibm_htk_device_ids,
1350 .notify = hotkey_notify,
1351 .handle = &hkey_handle,
1352 .type = ACPI_DEVICE_NOTIFY,
1353 };
1354
1355 static struct ibm_struct hotkey_driver_data = {
1356 .name = "hotkey",
1357 .read = hotkey_read,
1358 .write = hotkey_write,
1359 .exit = hotkey_exit,
1360 .resume = hotkey_resume,
1361 .acpi = &ibm_hotkey_acpidriver,
1362 };
1363
1364 /*************************************************************************
1365 * Bluetooth subdriver
1366 */
1367
1368 /* sysfs bluetooth enable ---------------------------------------------- */
1369 static ssize_t bluetooth_enable_show(struct device *dev,
1370 struct device_attribute *attr,
1371 char *buf)
1372 {
1373 int status;
1374
1375 status = bluetooth_get_radiosw();
1376 if (status < 0)
1377 return status;
1378
1379 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1380 }
1381
1382 static ssize_t bluetooth_enable_store(struct device *dev,
1383 struct device_attribute *attr,
1384 const char *buf, size_t count)
1385 {
1386 unsigned long t;
1387 int res;
1388
1389 if (parse_strtoul(buf, 1, &t))
1390 return -EINVAL;
1391
1392 res = bluetooth_set_radiosw(t);
1393
1394 return (res) ? res : count;
1395 }
1396
1397 static struct device_attribute dev_attr_bluetooth_enable =
1398 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1399 bluetooth_enable_show, bluetooth_enable_store);
1400
1401 /* --------------------------------------------------------------------- */
1402
1403 static struct attribute *bluetooth_attributes[] = {
1404 &dev_attr_bluetooth_enable.attr,
1405 NULL
1406 };
1407
1408 static const struct attribute_group bluetooth_attr_group = {
1409 .attrs = bluetooth_attributes,
1410 };
1411
1412 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1413 {
1414 int res;
1415 int status = 0;
1416
1417 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1418
1419 IBM_ACPIHANDLE_INIT(hkey);
1420
1421 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1422 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1423 tp_features.bluetooth = hkey_handle &&
1424 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1425
1426 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1427 str_supported(tp_features.bluetooth),
1428 status);
1429
1430 if (tp_features.bluetooth) {
1431 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1432 /* no bluetooth hardware present in system */
1433 tp_features.bluetooth = 0;
1434 dbg_printk(TPACPI_DBG_INIT,
1435 "bluetooth hardware not installed\n");
1436 } else {
1437 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1438 &bluetooth_attr_group);
1439 if (res)
1440 return res;
1441 }
1442 }
1443
1444 return (tp_features.bluetooth)? 0 : 1;
1445 }
1446
1447 static void bluetooth_exit(void)
1448 {
1449 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1450 &bluetooth_attr_group);
1451 }
1452
1453 static int bluetooth_get_radiosw(void)
1454 {
1455 int status;
1456
1457 if (!tp_features.bluetooth)
1458 return -ENODEV;
1459
1460 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1461 return -EIO;
1462
1463 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1464 }
1465
1466 static int bluetooth_set_radiosw(int radio_on)
1467 {
1468 int status;
1469
1470 if (!tp_features.bluetooth)
1471 return -ENODEV;
1472
1473 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1474 return -EIO;
1475 if (radio_on)
1476 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1477 else
1478 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1479 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1480 return -EIO;
1481
1482 return 0;
1483 }
1484
1485 /* procfs -------------------------------------------------------------- */
1486 static int bluetooth_read(char *p)
1487 {
1488 int len = 0;
1489 int status = bluetooth_get_radiosw();
1490
1491 if (!tp_features.bluetooth)
1492 len += sprintf(p + len, "status:\t\tnot supported\n");
1493 else {
1494 len += sprintf(p + len, "status:\t\t%s\n",
1495 (status)? "enabled" : "disabled");
1496 len += sprintf(p + len, "commands:\tenable, disable\n");
1497 }
1498
1499 return len;
1500 }
1501
1502 static int bluetooth_write(char *buf)
1503 {
1504 char *cmd;
1505
1506 if (!tp_features.bluetooth)
1507 return -ENODEV;
1508
1509 while ((cmd = next_cmd(&buf))) {
1510 if (strlencmp(cmd, "enable") == 0) {
1511 bluetooth_set_radiosw(1);
1512 } else if (strlencmp(cmd, "disable") == 0) {
1513 bluetooth_set_radiosw(0);
1514 } else
1515 return -EINVAL;
1516 }
1517
1518 return 0;
1519 }
1520
1521 static struct ibm_struct bluetooth_driver_data = {
1522 .name = "bluetooth",
1523 .read = bluetooth_read,
1524 .write = bluetooth_write,
1525 .exit = bluetooth_exit,
1526 };
1527
1528 /*************************************************************************
1529 * Wan subdriver
1530 */
1531
1532 /* sysfs wan enable ---------------------------------------------------- */
1533 static ssize_t wan_enable_show(struct device *dev,
1534 struct device_attribute *attr,
1535 char *buf)
1536 {
1537 int status;
1538
1539 status = wan_get_radiosw();
1540 if (status < 0)
1541 return status;
1542
1543 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1544 }
1545
1546 static ssize_t wan_enable_store(struct device *dev,
1547 struct device_attribute *attr,
1548 const char *buf, size_t count)
1549 {
1550 unsigned long t;
1551 int res;
1552
1553 if (parse_strtoul(buf, 1, &t))
1554 return -EINVAL;
1555
1556 res = wan_set_radiosw(t);
1557
1558 return (res) ? res : count;
1559 }
1560
1561 static struct device_attribute dev_attr_wan_enable =
1562 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1563 wan_enable_show, wan_enable_store);
1564
1565 /* --------------------------------------------------------------------- */
1566
1567 static struct attribute *wan_attributes[] = {
1568 &dev_attr_wan_enable.attr,
1569 NULL
1570 };
1571
1572 static const struct attribute_group wan_attr_group = {
1573 .attrs = wan_attributes,
1574 };
1575
1576 static int __init wan_init(struct ibm_init_struct *iibm)
1577 {
1578 int res;
1579 int status = 0;
1580
1581 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1582
1583 IBM_ACPIHANDLE_INIT(hkey);
1584
1585 tp_features.wan = hkey_handle &&
1586 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1587
1588 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1589 str_supported(tp_features.wan),
1590 status);
1591
1592 if (tp_features.wan) {
1593 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1594 /* no wan hardware present in system */
1595 tp_features.wan = 0;
1596 dbg_printk(TPACPI_DBG_INIT,
1597 "wan hardware not installed\n");
1598 } else {
1599 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1600 &wan_attr_group);
1601 if (res)
1602 return res;
1603 }
1604 }
1605
1606 return (tp_features.wan)? 0 : 1;
1607 }
1608
1609 static void wan_exit(void)
1610 {
1611 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1612 &wan_attr_group);
1613 }
1614
1615 static int wan_get_radiosw(void)
1616 {
1617 int status;
1618
1619 if (!tp_features.wan)
1620 return -ENODEV;
1621
1622 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1623 return -EIO;
1624
1625 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1626 }
1627
1628 static int wan_set_radiosw(int radio_on)
1629 {
1630 int status;
1631
1632 if (!tp_features.wan)
1633 return -ENODEV;
1634
1635 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1636 return -EIO;
1637 if (radio_on)
1638 status |= TP_ACPI_WANCARD_RADIOSSW;
1639 else
1640 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1641 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1642 return -EIO;
1643
1644 return 0;
1645 }
1646
1647 /* procfs -------------------------------------------------------------- */
1648 static int wan_read(char *p)
1649 {
1650 int len = 0;
1651 int status = wan_get_radiosw();
1652
1653 if (!tp_features.wan)
1654 len += sprintf(p + len, "status:\t\tnot supported\n");
1655 else {
1656 len += sprintf(p + len, "status:\t\t%s\n",
1657 (status)? "enabled" : "disabled");
1658 len += sprintf(p + len, "commands:\tenable, disable\n");
1659 }
1660
1661 return len;
1662 }
1663
1664 static int wan_write(char *buf)
1665 {
1666 char *cmd;
1667
1668 if (!tp_features.wan)
1669 return -ENODEV;
1670
1671 while ((cmd = next_cmd(&buf))) {
1672 if (strlencmp(cmd, "enable") == 0) {
1673 wan_set_radiosw(1);
1674 } else if (strlencmp(cmd, "disable") == 0) {
1675 wan_set_radiosw(0);
1676 } else
1677 return -EINVAL;
1678 }
1679
1680 return 0;
1681 }
1682
1683 static struct ibm_struct wan_driver_data = {
1684 .name = "wan",
1685 .read = wan_read,
1686 .write = wan_write,
1687 .exit = wan_exit,
1688 .flags.experimental = 1,
1689 };
1690
1691 /*************************************************************************
1692 * Video subdriver
1693 */
1694
1695 static enum video_access_mode video_supported;
1696 static int video_orig_autosw;
1697
1698 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1699 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1700 "\\_SB.PCI0.VID0", /* 770e */
1701 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1702 "\\_SB.PCI0.AGP.VID", /* all others */
1703 ); /* R30, R31 */
1704
1705 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1706
1707 static int __init video_init(struct ibm_init_struct *iibm)
1708 {
1709 int ivga;
1710
1711 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1712
1713 IBM_ACPIHANDLE_INIT(vid);
1714 IBM_ACPIHANDLE_INIT(vid2);
1715
1716 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1717 /* G41, assume IVGA doesn't change */
1718 vid_handle = vid2_handle;
1719
1720 if (!vid_handle)
1721 /* video switching not supported on R30, R31 */
1722 video_supported = TPACPI_VIDEO_NONE;
1723 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1724 /* 570 */
1725 video_supported = TPACPI_VIDEO_570;
1726 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1727 /* 600e/x, 770e, 770x */
1728 video_supported = TPACPI_VIDEO_770;
1729 else
1730 /* all others */
1731 video_supported = TPACPI_VIDEO_NEW;
1732
1733 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1734 str_supported(video_supported != TPACPI_VIDEO_NONE),
1735 video_supported);
1736
1737 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1738 }
1739
1740 static void video_exit(void)
1741 {
1742 dbg_printk(TPACPI_DBG_EXIT,
1743 "restoring original video autoswitch mode\n");
1744 if (video_autosw_set(video_orig_autosw))
1745 printk(IBM_ERR "error while trying to restore original "
1746 "video autoswitch mode\n");
1747 }
1748
1749 static int video_outputsw_get(void)
1750 {
1751 int status = 0;
1752 int i;
1753
1754 switch (video_supported) {
1755 case TPACPI_VIDEO_570:
1756 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1757 TP_ACPI_VIDEO_570_PHSCMD))
1758 return -EIO;
1759 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1760 break;
1761 case TPACPI_VIDEO_770:
1762 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1763 return -EIO;
1764 if (i)
1765 status |= TP_ACPI_VIDEO_S_LCD;
1766 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1767 return -EIO;
1768 if (i)
1769 status |= TP_ACPI_VIDEO_S_CRT;
1770 break;
1771 case TPACPI_VIDEO_NEW:
1772 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1773 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1774 return -EIO;
1775 if (i)
1776 status |= TP_ACPI_VIDEO_S_CRT;
1777
1778 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1779 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1780 return -EIO;
1781 if (i)
1782 status |= TP_ACPI_VIDEO_S_LCD;
1783 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1784 return -EIO;
1785 if (i)
1786 status |= TP_ACPI_VIDEO_S_DVI;
1787 break;
1788 default:
1789 return -ENOSYS;
1790 }
1791
1792 return status;
1793 }
1794
1795 static int video_outputsw_set(int status)
1796 {
1797 int autosw;
1798 int res = 0;
1799
1800 switch (video_supported) {
1801 case TPACPI_VIDEO_570:
1802 res = acpi_evalf(NULL, NULL,
1803 "\\_SB.PHS2", "vdd",
1804 TP_ACPI_VIDEO_570_PHS2CMD,
1805 status | TP_ACPI_VIDEO_570_PHS2SET);
1806 break;
1807 case TPACPI_VIDEO_770:
1808 autosw = video_autosw_get();
1809 if (autosw < 0)
1810 return autosw;
1811
1812 res = video_autosw_set(1);
1813 if (res)
1814 return res;
1815 res = acpi_evalf(vid_handle, NULL,
1816 "ASWT", "vdd", status * 0x100, 0);
1817 if (!autosw && video_autosw_set(autosw)) {
1818 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1819 return -EIO;
1820 }
1821 break;
1822 case TPACPI_VIDEO_NEW:
1823 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1824 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1825 break;
1826 default:
1827 return -ENOSYS;
1828 }
1829
1830 return (res)? 0 : -EIO;
1831 }
1832
1833 static int video_autosw_get(void)
1834 {
1835 int autosw = 0;
1836
1837 switch (video_supported) {
1838 case TPACPI_VIDEO_570:
1839 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1840 return -EIO;
1841 break;
1842 case TPACPI_VIDEO_770:
1843 case TPACPI_VIDEO_NEW:
1844 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1845 return -EIO;
1846 break;
1847 default:
1848 return -ENOSYS;
1849 }
1850
1851 return autosw & 1;
1852 }
1853
1854 static int video_autosw_set(int enable)
1855 {
1856 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1857 return -EIO;
1858 return 0;
1859 }
1860
1861 static int video_outputsw_cycle(void)
1862 {
1863 int autosw = video_autosw_get();
1864 int res;
1865
1866 if (autosw < 0)
1867 return autosw;
1868
1869 switch (video_supported) {
1870 case TPACPI_VIDEO_570:
1871 res = video_autosw_set(1);
1872 if (res)
1873 return res;
1874 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1875 break;
1876 case TPACPI_VIDEO_770:
1877 case TPACPI_VIDEO_NEW:
1878 res = video_autosw_set(1);
1879 if (res)
1880 return res;
1881 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1882 break;
1883 default:
1884 return -ENOSYS;
1885 }
1886 if (!autosw && video_autosw_set(autosw)) {
1887 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1888 return -EIO;
1889 }
1890
1891 return (res)? 0 : -EIO;
1892 }
1893
1894 static int video_expand_toggle(void)
1895 {
1896 switch (video_supported) {
1897 case TPACPI_VIDEO_570:
1898 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1899 0 : -EIO;
1900 case TPACPI_VIDEO_770:
1901 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1902 0 : -EIO;
1903 case TPACPI_VIDEO_NEW:
1904 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1905 0 : -EIO;
1906 default:
1907 return -ENOSYS;
1908 }
1909 /* not reached */
1910 }
1911
1912 static int video_read(char *p)
1913 {
1914 int status, autosw;
1915 int len = 0;
1916
1917 if (video_supported == TPACPI_VIDEO_NONE) {
1918 len += sprintf(p + len, "status:\t\tnot supported\n");
1919 return len;
1920 }
1921
1922 status = video_outputsw_get();
1923 if (status < 0)
1924 return status;
1925
1926 autosw = video_autosw_get();
1927 if (autosw < 0)
1928 return autosw;
1929
1930 len += sprintf(p + len, "status:\t\tsupported\n");
1931 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1932 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1933 if (video_supported == TPACPI_VIDEO_NEW)
1934 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1935 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1936 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1937 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1938 if (video_supported == TPACPI_VIDEO_NEW)
1939 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1940 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1941 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1942
1943 return len;
1944 }
1945
1946 static int video_write(char *buf)
1947 {
1948 char *cmd;
1949 int enable, disable, status;
1950 int res;
1951
1952 if (video_supported == TPACPI_VIDEO_NONE)
1953 return -ENODEV;
1954
1955 enable = 0;
1956 disable = 0;
1957
1958 while ((cmd = next_cmd(&buf))) {
1959 if (strlencmp(cmd, "lcd_enable") == 0) {
1960 enable |= TP_ACPI_VIDEO_S_LCD;
1961 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1962 disable |= TP_ACPI_VIDEO_S_LCD;
1963 } else if (strlencmp(cmd, "crt_enable") == 0) {
1964 enable |= TP_ACPI_VIDEO_S_CRT;
1965 } else if (strlencmp(cmd, "crt_disable") == 0) {
1966 disable |= TP_ACPI_VIDEO_S_CRT;
1967 } else if (video_supported == TPACPI_VIDEO_NEW &&
1968 strlencmp(cmd, "dvi_enable") == 0) {
1969 enable |= TP_ACPI_VIDEO_S_DVI;
1970 } else if (video_supported == TPACPI_VIDEO_NEW &&
1971 strlencmp(cmd, "dvi_disable") == 0) {
1972 disable |= TP_ACPI_VIDEO_S_DVI;
1973 } else if (strlencmp(cmd, "auto_enable") == 0) {
1974 res = video_autosw_set(1);
1975 if (res)
1976 return res;
1977 } else if (strlencmp(cmd, "auto_disable") == 0) {
1978 res = video_autosw_set(0);
1979 if (res)
1980 return res;
1981 } else if (strlencmp(cmd, "video_switch") == 0) {
1982 res = video_outputsw_cycle();
1983 if (res)
1984 return res;
1985 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1986 res = video_expand_toggle();
1987 if (res)
1988 return res;
1989 } else
1990 return -EINVAL;
1991 }
1992
1993 if (enable || disable) {
1994 status = video_outputsw_get();
1995 if (status < 0)
1996 return status;
1997 res = video_outputsw_set((status & ~disable) | enable);
1998 if (res)
1999 return res;
2000 }
2001
2002 return 0;
2003 }
2004
2005 static struct ibm_struct video_driver_data = {
2006 .name = "video",
2007 .read = video_read,
2008 .write = video_write,
2009 .exit = video_exit,
2010 };
2011
2012 /*************************************************************************
2013 * Light (thinklight) subdriver
2014 */
2015
2016 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
2017 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
2018
2019 static int __init light_init(struct ibm_init_struct *iibm)
2020 {
2021 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
2022
2023 IBM_ACPIHANDLE_INIT(ledb);
2024 IBM_ACPIHANDLE_INIT(lght);
2025 IBM_ACPIHANDLE_INIT(cmos);
2026
2027 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
2028 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
2029
2030 if (tp_features.light)
2031 /* light status not supported on
2032 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
2033 tp_features.light_status =
2034 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
2035
2036 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
2037 str_supported(tp_features.light));
2038
2039 return (tp_features.light)? 0 : 1;
2040 }
2041
2042 static int light_read(char *p)
2043 {
2044 int len = 0;
2045 int status = 0;
2046
2047 if (!tp_features.light) {
2048 len += sprintf(p + len, "status:\t\tnot supported\n");
2049 } else if (!tp_features.light_status) {
2050 len += sprintf(p + len, "status:\t\tunknown\n");
2051 len += sprintf(p + len, "commands:\ton, off\n");
2052 } else {
2053 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
2054 return -EIO;
2055 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
2056 len += sprintf(p + len, "commands:\ton, off\n");
2057 }
2058
2059 return len;
2060 }
2061
2062 static int light_write(char *buf)
2063 {
2064 int cmos_cmd, lght_cmd;
2065 char *cmd;
2066 int success;
2067
2068 if (!tp_features.light)
2069 return -ENODEV;
2070
2071 while ((cmd = next_cmd(&buf))) {
2072 if (strlencmp(cmd, "on") == 0) {
2073 cmos_cmd = 0x0c;
2074 lght_cmd = 1;
2075 } else if (strlencmp(cmd, "off") == 0) {
2076 cmos_cmd = 0x0d;
2077 lght_cmd = 0;
2078 } else
2079 return -EINVAL;
2080
2081 success = cmos_handle ?
2082 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2083 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2084 if (!success)
2085 return -EIO;
2086 }
2087
2088 return 0;
2089 }
2090
2091 static struct ibm_struct light_driver_data = {
2092 .name = "light",
2093 .read = light_read,
2094 .write = light_write,
2095 };
2096
2097 /*************************************************************************
2098 * Dock subdriver
2099 */
2100
2101 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2102
2103 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
2104 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2105 "\\_SB.PCI0.PCI1.DOCK", /* all others */
2106 "\\_SB.PCI.ISA.SLCE", /* 570 */
2107 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2108
2109 /* don't list other alternatives as we install a notify handler on the 570 */
2110 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
2111
2112 static const struct acpi_device_id ibm_pci_device_ids[] = {
2113 {PCI_ROOT_HID_STRING, 0},
2114 {"", 0},
2115 };
2116
2117 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2118 {
2119 .notify = dock_notify,
2120 .handle = &dock_handle,
2121 .type = ACPI_SYSTEM_NOTIFY,
2122 },
2123 {
2124 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2125 * We just use it to get notifications of dock hotplug
2126 * in very old thinkpads */
2127 .hid = ibm_pci_device_ids,
2128 .notify = dock_notify,
2129 .handle = &pci_handle,
2130 .type = ACPI_SYSTEM_NOTIFY,
2131 },
2132 };
2133
2134 static struct ibm_struct dock_driver_data[2] = {
2135 {
2136 .name = "dock",
2137 .read = dock_read,
2138 .write = dock_write,
2139 .acpi = &ibm_dock_acpidriver[0],
2140 },
2141 {
2142 .name = "dock",
2143 .acpi = &ibm_dock_acpidriver[1],
2144 },
2145 };
2146
2147 #define dock_docked() (_sta(dock_handle) & 1)
2148
2149 static int __init dock_init(struct ibm_init_struct *iibm)
2150 {
2151 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2152
2153 IBM_ACPIHANDLE_INIT(dock);
2154
2155 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2156 str_supported(dock_handle != NULL));
2157
2158 return (dock_handle)? 0 : 1;
2159 }
2160
2161 static int __init dock_init2(struct ibm_init_struct *iibm)
2162 {
2163 int dock2_needed;
2164
2165 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2166
2167 if (dock_driver_data[0].flags.acpi_driver_registered &&
2168 dock_driver_data[0].flags.acpi_notify_installed) {
2169 IBM_ACPIHANDLE_INIT(pci);
2170 dock2_needed = (pci_handle != NULL);
2171 vdbg_printk(TPACPI_DBG_INIT,
2172 "dock PCI handler for the TP 570 is %s\n",
2173 str_supported(dock2_needed));
2174 } else {
2175 vdbg_printk(TPACPI_DBG_INIT,
2176 "dock subdriver part 2 not required\n");
2177 dock2_needed = 0;
2178 }
2179
2180 return (dock2_needed)? 0 : 1;
2181 }
2182
2183 static void dock_notify(struct ibm_struct *ibm, u32 event)
2184 {
2185 int docked = dock_docked();
2186 int pci = ibm->acpi->hid && ibm->acpi->device &&
2187 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
2188 int data;
2189
2190 if (event == 1 && !pci) /* 570 */
2191 data = 1; /* button */
2192 else if (event == 1 && pci) /* 570 */
2193 data = 3; /* dock */
2194 else if (event == 3 && docked)
2195 data = 1; /* button */
2196 else if (event == 3 && !docked)
2197 data = 2; /* undock */
2198 else if (event == 0 && docked)
2199 data = 3; /* dock */
2200 else {
2201 printk(IBM_ERR "unknown dock event %d, status %d\n",
2202 event, _sta(dock_handle));
2203 data = 0; /* unknown */
2204 }
2205 acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
2206 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2207 ibm->acpi->device->dev.bus_id,
2208 event, data);
2209 }
2210
2211 static int dock_read(char *p)
2212 {
2213 int len = 0;
2214 int docked = dock_docked();
2215
2216 if (!dock_handle)
2217 len += sprintf(p + len, "status:\t\tnot supported\n");
2218 else if (!docked)
2219 len += sprintf(p + len, "status:\t\tundocked\n");
2220 else {
2221 len += sprintf(p + len, "status:\t\tdocked\n");
2222 len += sprintf(p + len, "commands:\tdock, undock\n");
2223 }
2224
2225 return len;
2226 }
2227
2228 static int dock_write(char *buf)
2229 {
2230 char *cmd;
2231
2232 if (!dock_docked())
2233 return -ENODEV;
2234
2235 while ((cmd = next_cmd(&buf))) {
2236 if (strlencmp(cmd, "undock") == 0) {
2237 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2238 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2239 return -EIO;
2240 } else if (strlencmp(cmd, "dock") == 0) {
2241 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2242 return -EIO;
2243 } else
2244 return -EINVAL;
2245 }
2246
2247 return 0;
2248 }
2249
2250 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2251
2252 /*************************************************************************
2253 * Bay subdriver
2254 */
2255
2256 #ifdef CONFIG_THINKPAD_ACPI_BAY
2257 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
2258 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2259 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2260 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2261 ); /* A21e, R30, R31 */
2262 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2263 "_EJ0", /* all others */
2264 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2265 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
2266 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2267 ); /* all others */
2268 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
2269 "_EJ0", /* 770x */
2270 ); /* all others */
2271
2272 static int __init bay_init(struct ibm_init_struct *iibm)
2273 {
2274 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2275
2276 IBM_ACPIHANDLE_INIT(bay);
2277 if (bay_handle)
2278 IBM_ACPIHANDLE_INIT(bay_ej);
2279 IBM_ACPIHANDLE_INIT(bay2);
2280 if (bay2_handle)
2281 IBM_ACPIHANDLE_INIT(bay2_ej);
2282
2283 tp_features.bay_status = bay_handle &&
2284 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2285 tp_features.bay_status2 = bay2_handle &&
2286 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2287
2288 tp_features.bay_eject = bay_handle && bay_ej_handle &&
2289 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2290 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2291 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2292
2293 vdbg_printk(TPACPI_DBG_INIT,
2294 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2295 str_supported(tp_features.bay_status),
2296 str_supported(tp_features.bay_eject),
2297 str_supported(tp_features.bay_status2),
2298 str_supported(tp_features.bay_eject2));
2299
2300 return (tp_features.bay_status || tp_features.bay_eject ||
2301 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2302 }
2303
2304 static void bay_notify(struct ibm_struct *ibm, u32 event)
2305 {
2306 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
2307 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2308 ibm->acpi->device->dev.bus_id,
2309 event, 0);
2310 }
2311
2312 #define bay_occupied(b) (_sta(b##_handle) & 1)
2313
2314 static int bay_read(char *p)
2315 {
2316 int len = 0;
2317 int occupied = bay_occupied(bay);
2318 int occupied2 = bay_occupied(bay2);
2319 int eject, eject2;
2320
2321 len += sprintf(p + len, "status:\t\t%s\n",
2322 tp_features.bay_status ?
2323 (occupied ? "occupied" : "unoccupied") :
2324 "not supported");
2325 if (tp_features.bay_status2)
2326 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2327 "occupied" : "unoccupied");
2328
2329 eject = tp_features.bay_eject && occupied;
2330 eject2 = tp_features.bay_eject2 && occupied2;
2331
2332 if (eject && eject2)
2333 len += sprintf(p + len, "commands:\teject, eject2\n");
2334 else if (eject)
2335 len += sprintf(p + len, "commands:\teject\n");
2336 else if (eject2)
2337 len += sprintf(p + len, "commands:\teject2\n");
2338
2339 return len;
2340 }
2341
2342 static int bay_write(char *buf)
2343 {
2344 char *cmd;
2345
2346 if (!tp_features.bay_eject && !tp_features.bay_eject2)
2347 return -ENODEV;
2348
2349 while ((cmd = next_cmd(&buf))) {
2350 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2351 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2352 return -EIO;
2353 } else if (tp_features.bay_eject2 &&
2354 strlencmp(cmd, "eject2") == 0) {
2355 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2356 return -EIO;
2357 } else
2358 return -EINVAL;
2359 }
2360
2361 return 0;
2362 }
2363
2364 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2365 .notify = bay_notify,
2366 .handle = &bay_handle,
2367 .type = ACPI_SYSTEM_NOTIFY,
2368 };
2369
2370 static struct ibm_struct bay_driver_data = {
2371 .name = "bay",
2372 .read = bay_read,
2373 .write = bay_write,
2374 .acpi = &ibm_bay_acpidriver,
2375 };
2376
2377 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2378
2379 /*************************************************************************
2380 * CMOS subdriver
2381 */
2382
2383 /* sysfs cmos_command -------------------------------------------------- */
2384 static ssize_t cmos_command_store(struct device *dev,
2385 struct device_attribute *attr,
2386 const char *buf, size_t count)
2387 {
2388 unsigned long cmos_cmd;
2389 int res;
2390
2391 if (parse_strtoul(buf, 21, &cmos_cmd))
2392 return -EINVAL;
2393
2394 res = issue_thinkpad_cmos_command(cmos_cmd);
2395 return (res)? res : count;
2396 }
2397
2398 static struct device_attribute dev_attr_cmos_command =
2399 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2400
2401 /* --------------------------------------------------------------------- */
2402
2403 static int __init cmos_init(struct ibm_init_struct *iibm)
2404 {
2405 int res;
2406
2407 vdbg_printk(TPACPI_DBG_INIT,
2408 "initializing cmos commands subdriver\n");
2409
2410 IBM_ACPIHANDLE_INIT(cmos);
2411
2412 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2413 str_supported(cmos_handle != NULL));
2414
2415 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2416 if (res)
2417 return res;
2418
2419 return (cmos_handle)? 0 : 1;
2420 }
2421
2422 static void cmos_exit(void)
2423 {
2424 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2425 }
2426
2427 static int cmos_read(char *p)
2428 {
2429 int len = 0;
2430
2431 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2432 R30, R31, T20-22, X20-21 */
2433 if (!cmos_handle)
2434 len += sprintf(p + len, "status:\t\tnot supported\n");
2435 else {
2436 len += sprintf(p + len, "status:\t\tsupported\n");
2437 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2438 }
2439
2440 return len;
2441 }
2442
2443 static int cmos_write(char *buf)
2444 {
2445 char *cmd;
2446 int cmos_cmd, res;
2447
2448 while ((cmd = next_cmd(&buf))) {
2449 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2450 cmos_cmd >= 0 && cmos_cmd <= 21) {
2451 /* cmos_cmd set */
2452 } else
2453 return -EINVAL;
2454
2455 res = issue_thinkpad_cmos_command(cmos_cmd);
2456 if (res)
2457 return res;
2458 }
2459
2460 return 0;
2461 }
2462
2463 static struct ibm_struct cmos_driver_data = {
2464 .name = "cmos",
2465 .read = cmos_read,
2466 .write = cmos_write,
2467 .exit = cmos_exit,
2468 };
2469
2470 /*************************************************************************
2471 * LED subdriver
2472 */
2473
2474 static enum led_access_mode led_supported;
2475
2476 IBM_HANDLE(led, ec, "SLED", /* 570 */
2477 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2478 "LED", /* all others */
2479 ); /* R30, R31 */
2480
2481 static int __init led_init(struct ibm_init_struct *iibm)
2482 {
2483 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2484
2485 IBM_ACPIHANDLE_INIT(led);
2486
2487 if (!led_handle)
2488 /* led not supported on R30, R31 */
2489 led_supported = TPACPI_LED_NONE;
2490 else if (strlencmp(led_path, "SLED") == 0)
2491 /* 570 */
2492 led_supported = TPACPI_LED_570;
2493 else if (strlencmp(led_path, "SYSL") == 0)
2494 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2495 led_supported = TPACPI_LED_OLD;
2496 else
2497 /* all others */
2498 led_supported = TPACPI_LED_NEW;
2499
2500 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2501 str_supported(led_supported), led_supported);
2502
2503 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2504 }
2505
2506 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2507
2508 static int led_read(char *p)
2509 {
2510 int len = 0;
2511
2512 if (!led_supported) {
2513 len += sprintf(p + len, "status:\t\tnot supported\n");
2514 return len;
2515 }
2516 len += sprintf(p + len, "status:\t\tsupported\n");
2517
2518 if (led_supported == TPACPI_LED_570) {
2519 /* 570 */
2520 int i, status;
2521 for (i = 0; i < 8; i++) {
2522 if (!acpi_evalf(ec_handle,
2523 &status, "GLED", "dd", 1 << i))
2524 return -EIO;
2525 len += sprintf(p + len, "%d:\t\t%s\n",
2526 i, led_status(status));
2527 }
2528 }
2529
2530 len += sprintf(p + len, "commands:\t"
2531 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2532
2533 return len;
2534 }
2535
2536 /* off, on, blink */
2537 static const int led_sled_arg1[] = { 0, 1, 3 };
2538 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
2539 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
2540 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2541
2542 static int led_write(char *buf)
2543 {
2544 char *cmd;
2545 int led, ind, ret;
2546
2547 if (!led_supported)
2548 return -ENODEV;
2549
2550 while ((cmd = next_cmd(&buf))) {
2551 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2552 return -EINVAL;
2553
2554 if (strstr(cmd, "off")) {
2555 ind = 0;
2556 } else if (strstr(cmd, "on")) {
2557 ind = 1;
2558 } else if (strstr(cmd, "blink")) {
2559 ind = 2;
2560 } else
2561 return -EINVAL;
2562
2563 if (led_supported == TPACPI_LED_570) {
2564 /* 570 */
2565 led = 1 << led;
2566 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2567 led, led_sled_arg1[ind]))
2568 return -EIO;
2569 } else if (led_supported == TPACPI_LED_OLD) {
2570 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2571 led = 1 << led;
2572 ret = ec_write(TPACPI_LED_EC_HLMS, led);
2573 if (ret >= 0)
2574 ret =
2575 ec_write(TPACPI_LED_EC_HLBL,
2576 led * led_exp_hlbl[ind]);
2577 if (ret >= 0)
2578 ret =
2579 ec_write(TPACPI_LED_EC_HLCL,
2580 led * led_exp_hlcl[ind]);
2581 if (ret < 0)
2582 return ret;
2583 } else {
2584 /* all others */
2585 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2586 led, led_led_arg1[ind]))
2587 return -EIO;
2588 }
2589 }
2590
2591 return 0;
2592 }
2593
2594 static struct ibm_struct led_driver_data = {
2595 .name = "led",
2596 .read = led_read,
2597 .write = led_write,
2598 };
2599
2600 /*************************************************************************
2601 * Beep subdriver
2602 */
2603
2604 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
2605
2606 static int __init beep_init(struct ibm_init_struct *iibm)
2607 {
2608 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2609
2610 IBM_ACPIHANDLE_INIT(beep);
2611
2612 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2613 str_supported(beep_handle != NULL));
2614
2615 return (beep_handle)? 0 : 1;
2616 }
2617
2618 static int beep_read(char *p)
2619 {
2620 int len = 0;
2621
2622 if (!beep_handle)
2623 len += sprintf(p + len, "status:\t\tnot supported\n");
2624 else {
2625 len += sprintf(p + len, "status:\t\tsupported\n");
2626 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2627 }
2628
2629 return len;
2630 }
2631
2632 static int beep_write(char *buf)
2633 {
2634 char *cmd;
2635 int beep_cmd;
2636
2637 if (!beep_handle)
2638 return -ENODEV;
2639
2640 while ((cmd = next_cmd(&buf))) {
2641 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2642 beep_cmd >= 0 && beep_cmd <= 17) {
2643 /* beep_cmd set */
2644 } else
2645 return -EINVAL;
2646 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2647 return -EIO;
2648 }
2649
2650 return 0;
2651 }
2652
2653 static struct ibm_struct beep_driver_data = {
2654 .name = "beep",
2655 .read = beep_read,
2656 .write = beep_write,
2657 };
2658
2659 /*************************************************************************
2660 * Thermal subdriver
2661 */
2662
2663 static enum thermal_access_mode thermal_read_mode;
2664
2665 /* sysfs temp##_input -------------------------------------------------- */
2666
2667 static ssize_t thermal_temp_input_show(struct device *dev,
2668 struct device_attribute *attr,
2669 char *buf)
2670 {
2671 struct sensor_device_attribute *sensor_attr =
2672 to_sensor_dev_attr(attr);
2673 int idx = sensor_attr->index;
2674 s32 value;
2675 int res;
2676
2677 res = thermal_get_sensor(idx, &value);
2678 if (res)
2679 return res;
2680 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2681 return -ENXIO;
2682
2683 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2684 }
2685
2686 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2687 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2688
2689 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2690 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2691 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2692 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2693 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2694 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2695 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2696 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2697 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2698 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2699 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2700 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2701 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2702 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2703 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2704 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2705 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2706 };
2707
2708 #define THERMAL_ATTRS(X) \
2709 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2710
2711 static struct attribute *thermal_temp_input_attr[] = {
2712 THERMAL_ATTRS(8),
2713 THERMAL_ATTRS(9),
2714 THERMAL_ATTRS(10),
2715 THERMAL_ATTRS(11),
2716 THERMAL_ATTRS(12),
2717 THERMAL_ATTRS(13),
2718 THERMAL_ATTRS(14),
2719 THERMAL_ATTRS(15),
2720 THERMAL_ATTRS(0),
2721 THERMAL_ATTRS(1),
2722 THERMAL_ATTRS(2),
2723 THERMAL_ATTRS(3),
2724 THERMAL_ATTRS(4),
2725 THERMAL_ATTRS(5),
2726 THERMAL_ATTRS(6),
2727 THERMAL_ATTRS(7),
2728 NULL
2729 };
2730
2731 static const struct attribute_group thermal_temp_input16_group = {
2732 .attrs = thermal_temp_input_attr
2733 };
2734
2735 static const struct attribute_group thermal_temp_input8_group = {
2736 .attrs = &thermal_temp_input_attr[8]
2737 };
2738
2739 #undef THERMAL_SENSOR_ATTR_TEMP
2740 #undef THERMAL_ATTRS
2741
2742 /* --------------------------------------------------------------------- */
2743
2744 static int __init thermal_init(struct ibm_init_struct *iibm)
2745 {
2746 u8 t, ta1, ta2;
2747 int i;
2748 int acpi_tmp7;
2749 int res;
2750
2751 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2752
2753 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2754
2755 if (thinkpad_id.ec_model) {
2756 /*
2757 * Direct EC access mode: sensors at registers
2758 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2759 * non-implemented, thermal sensors return 0x80 when
2760 * not available
2761 */
2762
2763 ta1 = ta2 = 0;
2764 for (i = 0; i < 8; i++) {
2765 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2766 ta1 |= t;
2767 } else {
2768 ta1 = 0;
2769 break;
2770 }
2771 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2772 ta2 |= t;
2773 } else {
2774 ta1 = 0;
2775 break;
2776 }
2777 }
2778 if (ta1 == 0) {
2779 /* This is sheer paranoia, but we handle it anyway */
2780 if (acpi_tmp7) {
2781 printk(IBM_ERR
2782 "ThinkPad ACPI EC access misbehaving, "
2783 "falling back to ACPI TMPx access mode\n");
2784 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2785 } else {
2786 printk(IBM_ERR
2787 "ThinkPad ACPI EC access misbehaving, "
2788 "disabling thermal sensors access\n");
2789 thermal_read_mode = TPACPI_THERMAL_NONE;
2790 }
2791 } else {
2792 thermal_read_mode =
2793 (ta2 != 0) ?
2794 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2795 }
2796 } else if (acpi_tmp7) {
2797 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2798 /* 600e/x, 770e, 770x */
2799 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2800 } else {
2801 /* Standard ACPI TMPx access, max 8 sensors */
2802 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2803 }
2804 } else {
2805 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2806 thermal_read_mode = TPACPI_THERMAL_NONE;
2807 }
2808
2809 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2810 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2811 thermal_read_mode);
2812
2813 switch(thermal_read_mode) {
2814 case TPACPI_THERMAL_TPEC_16:
2815 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2816 &thermal_temp_input16_group);
2817 if (res)
2818 return res;
2819 break;
2820 case TPACPI_THERMAL_TPEC_8:
2821 case TPACPI_THERMAL_ACPI_TMP07:
2822 case TPACPI_THERMAL_ACPI_UPDT:
2823 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2824 &thermal_temp_input8_group);
2825 if (res)
2826 return res;
2827 break;
2828 case TPACPI_THERMAL_NONE:
2829 default:
2830 return 1;
2831 }
2832
2833 return 0;
2834 }
2835
2836 static void thermal_exit(void)
2837 {
2838 switch(thermal_read_mode) {
2839 case TPACPI_THERMAL_TPEC_16:
2840 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2841 &thermal_temp_input16_group);
2842 break;
2843 case TPACPI_THERMAL_TPEC_8:
2844 case TPACPI_THERMAL_ACPI_TMP07:
2845 case TPACPI_THERMAL_ACPI_UPDT:
2846 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2847 &thermal_temp_input16_group);
2848 break;
2849 case TPACPI_THERMAL_NONE:
2850 default:
2851 break;
2852 }
2853 }
2854
2855 /* idx is zero-based */
2856 static int thermal_get_sensor(int idx, s32 *value)
2857 {
2858 int t;
2859 s8 tmp;
2860 char tmpi[5];
2861
2862 t = TP_EC_THERMAL_TMP0;
2863
2864 switch (thermal_read_mode) {
2865 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2866 case TPACPI_THERMAL_TPEC_16:
2867 if (idx >= 8 && idx <= 15) {
2868 t = TP_EC_THERMAL_TMP8;
2869 idx -= 8;
2870 }
2871 /* fallthrough */
2872 #endif
2873 case TPACPI_THERMAL_TPEC_8:
2874 if (idx <= 7) {
2875 if (!acpi_ec_read(t + idx, &tmp))
2876 return -EIO;
2877 *value = tmp * 1000;
2878 return 0;
2879 }
2880 break;
2881
2882 case TPACPI_THERMAL_ACPI_UPDT:
2883 if (idx <= 7) {
2884 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2885 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2886 return -EIO;
2887 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2888 return -EIO;
2889 *value = (t - 2732) * 100;
2890 return 0;
2891 }
2892 break;
2893
2894 case TPACPI_THERMAL_ACPI_TMP07:
2895 if (idx <= 7) {
2896 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2897 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2898 return -EIO;
2899 if (t > 127 || t < -127)
2900 t = TP_EC_THERMAL_TMP_NA;
2901 *value = t * 1000;
2902 return 0;
2903 }
2904 break;
2905
2906 case TPACPI_THERMAL_NONE:
2907 default:
2908 return -ENOSYS;
2909 }
2910
2911 return -EINVAL;
2912 }
2913
2914 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2915 {
2916 int res, i;
2917 int n;
2918
2919 n = 8;
2920 i = 0;
2921
2922 if (!s)
2923 return -EINVAL;
2924
2925 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2926 n = 16;
2927
2928 for(i = 0 ; i < n; i++) {
2929 res = thermal_get_sensor(i, &s->temp[i]);
2930 if (res)
2931 return res;
2932 }
2933
2934 return n;
2935 }
2936
2937 static int thermal_read(char *p)
2938 {
2939 int len = 0;
2940 int n, i;
2941 struct ibm_thermal_sensors_struct t;
2942
2943 n = thermal_get_sensors(&t);
2944 if (unlikely(n < 0))
2945 return n;
2946
2947 len += sprintf(p + len, "temperatures:\t");
2948
2949 if (n > 0) {
2950 for (i = 0; i < (n - 1); i++)
2951 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2952 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2953 } else
2954 len += sprintf(p + len, "not supported\n");
2955
2956 return len;
2957 }
2958
2959 static struct ibm_struct thermal_driver_data = {
2960 .name = "thermal",
2961 .read = thermal_read,
2962 .exit = thermal_exit,
2963 };
2964
2965 /*************************************************************************
2966 * EC Dump subdriver
2967 */
2968
2969 static u8 ecdump_regs[256];
2970
2971 static int ecdump_read(char *p)
2972 {
2973 int len = 0;
2974 int i, j;
2975 u8 v;
2976
2977 len += sprintf(p + len, "EC "
2978 " +00 +01 +02 +03 +04 +05 +06 +07"
2979 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2980 for (i = 0; i < 256; i += 16) {
2981 len += sprintf(p + len, "EC 0x%02x:", i);
2982 for (j = 0; j < 16; j++) {
2983 if (!acpi_ec_read(i + j, &v))
2984 break;
2985 if (v != ecdump_regs[i + j])
2986 len += sprintf(p + len, " *%02x", v);
2987 else
2988 len += sprintf(p + len, " %02x", v);
2989 ecdump_regs[i + j] = v;
2990 }
2991 len += sprintf(p + len, "\n");
2992 if (j != 16)
2993 break;
2994 }
2995
2996 /* These are way too dangerous to advertise openly... */
2997 #if 0
2998 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2999 " (<offset> is 00-ff, <value> is 00-ff)\n");
3000 len += sprintf(p + len, "commands:\t0x<offset> <value> "
3001 " (<offset> is 00-ff, <value> is 0-255)\n");
3002 #endif
3003 return len;
3004 }
3005
3006 static int ecdump_write(char *buf)
3007 {
3008 char *cmd;
3009 int i, v;
3010
3011 while ((cmd = next_cmd(&buf))) {
3012 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
3013 /* i and v set */
3014 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
3015 /* i and v set */
3016 } else
3017 return -EINVAL;
3018 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
3019 if (!acpi_ec_write(i, v))
3020 return -EIO;
3021 } else
3022 return -EINVAL;
3023 }
3024
3025 return 0;
3026 }
3027
3028 static struct ibm_struct ecdump_driver_data = {
3029 .name = "ecdump",
3030 .read = ecdump_read,
3031 .write = ecdump_write,
3032 .flags.experimental = 1,
3033 };
3034
3035 /*************************************************************************
3036 * Backlight/brightness subdriver
3037 */
3038
3039 static struct backlight_device *ibm_backlight_device;
3040
3041 static struct backlight_ops ibm_backlight_data = {
3042 .get_brightness = brightness_get,
3043 .update_status = brightness_update_status,
3044 };
3045
3046 static struct mutex brightness_mutex;
3047
3048 static int __init brightness_init(struct ibm_init_struct *iibm)
3049 {
3050 int b;
3051
3052 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3053
3054 mutex_init(&brightness_mutex);
3055
3056 if (!brightness_mode) {
3057 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3058 brightness_mode = 2;
3059 else
3060 brightness_mode = 3;
3061
3062 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3063 brightness_mode);
3064 }
3065
3066 if (brightness_mode > 3)
3067 return -EINVAL;
3068
3069 b = brightness_get(NULL);
3070 if (b < 0)
3071 return 1;
3072
3073 ibm_backlight_device = backlight_device_register(
3074 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3075 &ibm_backlight_data);
3076 if (IS_ERR(ibm_backlight_device)) {
3077 printk(IBM_ERR "Could not register backlight device\n");
3078 return PTR_ERR(ibm_backlight_device);
3079 }
3080 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3081
3082 ibm_backlight_device->props.max_brightness = 7;
3083 ibm_backlight_device->props.brightness = b;
3084 backlight_update_status(ibm_backlight_device);
3085
3086 return 0;
3087 }
3088
3089 static void brightness_exit(void)
3090 {
3091 if (ibm_backlight_device) {
3092 vdbg_printk(TPACPI_DBG_EXIT,
3093 "calling backlight_device_unregister()\n");
3094 backlight_device_unregister(ibm_backlight_device);
3095 ibm_backlight_device = NULL;
3096 }
3097 }
3098
3099 static int brightness_update_status(struct backlight_device *bd)
3100 {
3101 return brightness_set(
3102 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3103 bd->props.power == FB_BLANK_UNBLANK) ?
3104 bd->props.brightness : 0);
3105 }
3106
3107 /*
3108 * ThinkPads can read brightness from two places: EC 0x31, or
3109 * CMOS NVRAM byte 0x5E, bits 0-3.
3110 */
3111 static int brightness_get(struct backlight_device *bd)
3112 {
3113 u8 lec = 0, lcmos = 0, level = 0;
3114
3115 if (brightness_mode & 1) {
3116 if (!acpi_ec_read(brightness_offset, &lec))
3117 return -EIO;
3118 lec &= 7;
3119 level = lec;
3120 };
3121 if (brightness_mode & 2) {
3122 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3123 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3124 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3125 level = lcmos;
3126 }
3127
3128 if (brightness_mode == 3 && lec != lcmos) {
3129 printk(IBM_ERR
3130 "CMOS NVRAM (%u) and EC (%u) do not agree "
3131 "on display brightness level\n",
3132 (unsigned int) lcmos,
3133 (unsigned int) lec);
3134 return -EIO;
3135 }
3136
3137 return level;
3138 }
3139
3140 static int brightness_set(int value)
3141 {
3142 int cmos_cmd, inc, i, res;
3143 int current_value;
3144
3145 if (value > 7)
3146 return -EINVAL;
3147
3148 res = mutex_lock_interruptible(&brightness_mutex);
3149 if (res < 0)
3150 return res;
3151
3152 current_value = brightness_get(NULL);
3153 if (current_value < 0) {
3154 res = current_value;
3155 goto errout;
3156 }
3157
3158 cmos_cmd = value > current_value ?
3159 TP_CMOS_BRIGHTNESS_UP :
3160 TP_CMOS_BRIGHTNESS_DOWN;
3161 inc = value > current_value ? 1 : -1;
3162
3163 res = 0;
3164 for (i = current_value; i != value; i += inc) {
3165 if ((brightness_mode & 2) &&
3166 issue_thinkpad_cmos_command(cmos_cmd)) {
3167 res = -EIO;
3168 goto errout;
3169 }
3170 if ((brightness_mode & 1) &&
3171 !acpi_ec_write(brightness_offset, i + inc)) {
3172 res = -EIO;
3173 goto errout;;
3174 }
3175 }
3176
3177 errout:
3178 mutex_unlock(&brightness_mutex);
3179 return res;
3180 }
3181
3182 static int brightness_read(char *p)
3183 {
3184 int len = 0;
3185 int level;
3186
3187 if ((level = brightness_get(NULL)) < 0) {
3188 len += sprintf(p + len, "level:\t\tunreadable\n");
3189 } else {
3190 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
3191 len += sprintf(p + len, "commands:\tup, down\n");
3192 len += sprintf(p + len, "commands:\tlevel <level>"
3193 " (<level> is 0-7)\n");
3194 }
3195
3196 return len;
3197 }
3198
3199 static int brightness_write(char *buf)
3200 {
3201 int level;
3202 int new_level;
3203 char *cmd;
3204
3205 while ((cmd = next_cmd(&buf))) {
3206 if ((level = brightness_get(NULL)) < 0)
3207 return level;
3208 level &= 7;
3209
3210 if (strlencmp(cmd, "up") == 0) {
3211 new_level = level == 7 ? 7 : level + 1;
3212 } else if (strlencmp(cmd, "down") == 0) {
3213 new_level = level == 0 ? 0 : level - 1;
3214 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3215 new_level >= 0 && new_level <= 7) {
3216 /* new_level set */
3217 } else
3218 return -EINVAL;
3219
3220 brightness_set(new_level);
3221 }
3222
3223 return 0;
3224 }
3225
3226 static struct ibm_struct brightness_driver_data = {
3227 .name = "brightness",
3228 .read = brightness_read,
3229 .write = brightness_write,
3230 .exit = brightness_exit,
3231 };
3232
3233 /*************************************************************************
3234 * Volume subdriver
3235 */
3236
3237 static int volume_read(char *p)
3238 {
3239 int len = 0;
3240 u8 level;
3241
3242 if (!acpi_ec_read(volume_offset, &level)) {
3243 len += sprintf(p + len, "level:\t\tunreadable\n");
3244 } else {
3245 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3246 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3247 len += sprintf(p + len, "commands:\tup, down, mute\n");
3248 len += sprintf(p + len, "commands:\tlevel <level>"
3249 " (<level> is 0-15)\n");
3250 }
3251
3252 return len;
3253 }
3254
3255 static int volume_write(char *buf)
3256 {
3257 int cmos_cmd, inc, i;
3258 u8 level, mute;
3259 int new_level, new_mute;
3260 char *cmd;
3261
3262 while ((cmd = next_cmd(&buf))) {
3263 if (!acpi_ec_read(volume_offset, &level))
3264 return -EIO;
3265 new_mute = mute = level & 0x40;
3266 new_level = level = level & 0xf;
3267
3268 if (strlencmp(cmd, "up") == 0) {
3269 if (mute)
3270 new_mute = 0;
3271 else
3272 new_level = level == 15 ? 15 : level + 1;
3273 } else if (strlencmp(cmd, "down") == 0) {
3274 if (mute)
3275 new_mute = 0;
3276 else
3277 new_level = level == 0 ? 0 : level - 1;
3278 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3279 new_level >= 0 && new_level <= 15) {
3280 /* new_level set */
3281 } else if (strlencmp(cmd, "mute") == 0) {
3282 new_mute = 0x40;
3283 } else
3284 return -EINVAL;
3285
3286 if (new_level != level) { /* mute doesn't change */
3287 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3288 inc = new_level > level ? 1 : -1;
3289
3290 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3291 !acpi_ec_write(volume_offset, level)))
3292 return -EIO;
3293
3294 for (i = level; i != new_level; i += inc)
3295 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3296 !acpi_ec_write(volume_offset, i + inc))
3297 return -EIO;
3298
3299 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3300 !acpi_ec_write(volume_offset,
3301 new_level + mute)))
3302 return -EIO;
3303 }
3304
3305 if (new_mute != mute) { /* level doesn't change */
3306 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3307
3308 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3309 !acpi_ec_write(volume_offset, level + new_mute))
3310 return -EIO;
3311 }
3312 }
3313
3314 return 0;
3315 }
3316
3317 static struct ibm_struct volume_driver_data = {
3318 .name = "volume",
3319 .read = volume_read,
3320 .write = volume_write,
3321 };
3322
3323 /*************************************************************************
3324 * Fan subdriver
3325 */
3326
3327 /*
3328 * FAN ACCESS MODES
3329 *
3330 * TPACPI_FAN_RD_ACPI_GFAN:
3331 * ACPI GFAN method: returns fan level
3332 *
3333 * see TPACPI_FAN_WR_ACPI_SFAN
3334 * EC 0x2f (HFSP) not available if GFAN exists
3335 *
3336 * TPACPI_FAN_WR_ACPI_SFAN:
3337 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3338 *
3339 * EC 0x2f (HFSP) might be available *for reading*, but do not use
3340 * it for writing.
3341 *
3342 * TPACPI_FAN_WR_TPEC:
3343 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
3344 * Supported on almost all ThinkPads
3345 *
3346 * Fan speed changes of any sort (including those caused by the
3347 * disengaged mode) are usually done slowly by the firmware as the
3348 * maximum ammount of fan duty cycle change per second seems to be
3349 * limited.
3350 *
3351 * Reading is not available if GFAN exists.
3352 * Writing is not available if SFAN exists.
3353 *
3354 * Bits
3355 * 7 automatic mode engaged;
3356 * (default operation mode of the ThinkPad)
3357 * fan level is ignored in this mode.
3358 * 6 full speed mode (takes precedence over bit 7);
3359 * not available on all thinkpads. May disable
3360 * the tachometer while the fan controller ramps up
3361 * the speed (which can take up to a few *minutes*).
3362 * Speeds up fan to 100% duty-cycle, which is far above
3363 * the standard RPM levels. It is not impossible that
3364 * it could cause hardware damage.
3365 * 5-3 unused in some models. Extra bits for fan level
3366 * in others, but still useless as all values above
3367 * 7 map to the same speed as level 7 in these models.
3368 * 2-0 fan level (0..7 usually)
3369 * 0x00 = stop
3370 * 0x07 = max (set when temperatures critical)
3371 * Some ThinkPads may have other levels, see
3372 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3373 *
3374 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3375 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3376 * does so, its initial value is meaningless (0x07).
3377 *
3378 * For firmware bugs, refer to:
3379 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3380 *
3381 * ----
3382 *
3383 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3384 * Main fan tachometer reading (in RPM)
3385 *
3386 * This register is present on all ThinkPads with a new-style EC, and
3387 * it is known not to be present on the A21m/e, and T22, as there is
3388 * something else in offset 0x84 according to the ACPI DSDT. Other
3389 * ThinkPads from this same time period (and earlier) probably lack the
3390 * tachometer as well.
3391 *
3392 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3393 * was never fixed by IBM to report the EC firmware version string
3394 * probably support the tachometer (like the early X models), so
3395 * detecting it is quite hard. We need more data to know for sure.
3396 *
3397 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3398 * might result.
3399 *
3400 * FIRMWARE BUG: may go stale while the EC is switching to full speed
3401 * mode.
3402 *
3403 * For firmware bugs, refer to:
3404 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3405 *
3406 * TPACPI_FAN_WR_ACPI_FANS:
3407 * ThinkPad X31, X40, X41. Not available in the X60.
3408 *
3409 * FANS ACPI handle: takes three arguments: low speed, medium speed,
3410 * high speed. ACPI DSDT seems to map these three speeds to levels
3411 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3412 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3413 *
3414 * The speeds are stored on handles
3415 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3416 *
3417 * There are three default speed sets, acessible as handles:
3418 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3419 *
3420 * ACPI DSDT switches which set is in use depending on various
3421 * factors.
3422 *
3423 * TPACPI_FAN_WR_TPEC is also available and should be used to
3424 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
3425 * but the ACPI tables just mention level 7.
3426 */
3427
3428 static enum fan_status_access_mode fan_status_access_mode;
3429 static enum fan_control_access_mode fan_control_access_mode;
3430 static enum fan_control_commands fan_control_commands;
3431
3432 static u8 fan_control_initial_status;
3433 static u8 fan_control_desired_level;
3434
3435 static void fan_watchdog_fire(struct work_struct *ignored);
3436 static int fan_watchdog_maxinterval;
3437 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3438
3439 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
3440 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
3441 "\\FSPD", /* 600e/x, 770e, 770x */
3442 ); /* all others */
3443 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
3444 "JFNS", /* 770x-JL */
3445 ); /* all others */
3446
3447 /*
3448 * SYSFS fan layout: hwmon compatible (device)
3449 *
3450 * pwm*_enable:
3451 * 0: "disengaged" mode
3452 * 1: manual mode
3453 * 2: native EC "auto" mode (recommended, hardware default)
3454 *
3455 * pwm*: set speed in manual mode, ignored otherwise.
3456 * 0 is level 0; 255 is level 7. Intermediate points done with linear
3457 * interpolation.
3458 *
3459 * fan*_input: tachometer reading, RPM
3460 *
3461 *
3462 * SYSFS fan layout: extensions
3463 *
3464 * fan_watchdog (driver):
3465 * fan watchdog interval in seconds, 0 disables (default), max 120
3466 */
3467
3468 /* sysfs fan pwm1_enable ----------------------------------------------- */
3469 static ssize_t fan_pwm1_enable_show(struct device *dev,
3470 struct device_attribute *attr,
3471 char *buf)
3472 {
3473 int res, mode;
3474 u8 status;
3475
3476 res = fan_get_status_safe(&status);
3477 if (res)
3478 return res;
3479
3480 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3481 if (status != fan_control_initial_status) {
3482 tp_features.fan_ctrl_status_undef = 0;
3483 } else {
3484 /* Return most likely status. In fact, it
3485 * might be the only possible status */
3486 status = TP_EC_FAN_AUTO;
3487 }
3488 }
3489
3490 if (status & TP_EC_FAN_FULLSPEED) {
3491 mode = 0;
3492 } else if (status & TP_EC_FAN_AUTO) {
3493 mode = 2;
3494 } else
3495 mode = 1;
3496
3497 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3498 }
3499
3500 static ssize_t fan_pwm1_enable_store(struct device *dev,
3501 struct device_attribute *attr,
3502 const char *buf, size_t count)
3503 {
3504 unsigned long t;
3505 int res, level;
3506
3507 if (parse_strtoul(buf, 2, &t))
3508 return -EINVAL;
3509
3510 switch (t) {
3511 case 0:
3512 level = TP_EC_FAN_FULLSPEED;
3513 break;
3514 case 1:
3515 level = TPACPI_FAN_LAST_LEVEL;
3516 break;
3517 case 2:
3518 level = TP_EC_FAN_AUTO;
3519 break;
3520 case 3:
3521 /* reserved for software-controlled auto mode */
3522 return -ENOSYS;
3523 default:
3524 return -EINVAL;
3525 }
3526
3527 res = fan_set_level_safe(level);
3528 if (res == -ENXIO)
3529 return -EINVAL;
3530 else if (res < 0)
3531 return res;
3532
3533 fan_watchdog_reset();
3534
3535 return count;
3536 }
3537
3538 static struct device_attribute dev_attr_fan_pwm1_enable =
3539 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3540 fan_pwm1_enable_show, fan_pwm1_enable_store);
3541
3542 /* sysfs fan pwm1 ------------------------------------------------------ */
3543 static ssize_t fan_pwm1_show(struct device *dev,
3544 struct device_attribute *attr,
3545 char *buf)
3546 {
3547 int res;
3548 u8 status;
3549
3550 res = fan_get_status_safe(&status);
3551 if (res)
3552 return res;
3553
3554 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3555 if (status != fan_control_initial_status) {
3556 tp_features.fan_ctrl_status_undef = 0;
3557 } else {
3558 status = TP_EC_FAN_AUTO;
3559 }
3560 }
3561
3562 if ((status &
3563 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3564 status = fan_control_desired_level;
3565
3566 if (status > 7)
3567 status = 7;
3568
3569 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3570 }
3571
3572 static ssize_t fan_pwm1_store(struct device *dev,
3573 struct device_attribute *attr,
3574 const char *buf, size_t count)
3575 {
3576 unsigned long s;
3577 int rc;
3578 u8 status, newlevel;
3579
3580 if (parse_strtoul(buf, 255, &s))
3581 return -EINVAL;
3582
3583 /* scale down from 0-255 to 0-7 */
3584 newlevel = (s >> 5) & 0x07;
3585
3586 rc = mutex_lock_interruptible(&fan_mutex);
3587 if (rc < 0)
3588 return rc;
3589
3590 rc = fan_get_status(&status);
3591 if (!rc && (status &
3592 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3593 rc = fan_set_level(newlevel);
3594 if (rc == -ENXIO)
3595 rc = -EINVAL;
3596 else if (!rc) {
3597 fan_update_desired_level(newlevel);
3598 fan_watchdog_reset();
3599 }
3600 }
3601
3602 mutex_unlock(&fan_mutex);
3603 return (rc)? rc : count;
3604 }
3605
3606 static struct device_attribute dev_attr_fan_pwm1 =
3607 __ATTR(pwm1, S_IWUSR | S_IRUGO,
3608 fan_pwm1_show, fan_pwm1_store);
3609
3610 /* sysfs fan fan1_input ------------------------------------------------ */
3611 static ssize_t fan_fan1_input_show(struct device *dev,
3612 struct device_attribute *attr,
3613 char *buf)
3614 {
3615 int res;
3616 unsigned int speed;
3617
3618 res = fan_get_speed(&speed);
3619 if (res < 0)
3620 return res;
3621
3622 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3623 }
3624
3625 static struct device_attribute dev_attr_fan_fan1_input =
3626 __ATTR(fan1_input, S_IRUGO,
3627 fan_fan1_input_show, NULL);
3628
3629 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3630 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3631 char *buf)
3632 {
3633 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3634 }
3635
3636 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3637 const char *buf, size_t count)
3638 {
3639 unsigned long t;
3640
3641 if (parse_strtoul(buf, 120, &t))
3642 return -EINVAL;
3643
3644 if (!fan_control_allowed)
3645 return -EPERM;
3646
3647 fan_watchdog_maxinterval = t;
3648 fan_watchdog_reset();
3649
3650 return count;
3651 }
3652
3653 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3654 fan_fan_watchdog_show, fan_fan_watchdog_store);
3655
3656 /* --------------------------------------------------------------------- */
3657 static struct attribute *fan_attributes[] = {
3658 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3659 &dev_attr_fan_fan1_input.attr,
3660 NULL
3661 };
3662
3663 static const struct attribute_group fan_attr_group = {
3664 .attrs = fan_attributes,
3665 };
3666
3667 static int __init fan_init(struct ibm_init_struct *iibm)
3668 {
3669 int rc;
3670
3671 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3672
3673 mutex_init(&fan_mutex);
3674 fan_status_access_mode = TPACPI_FAN_NONE;
3675 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3676 fan_control_commands = 0;
3677 fan_watchdog_maxinterval = 0;
3678 tp_features.fan_ctrl_status_undef = 0;
3679 fan_control_desired_level = 7;
3680
3681 IBM_ACPIHANDLE_INIT(fans);
3682 IBM_ACPIHANDLE_INIT(gfan);
3683 IBM_ACPIHANDLE_INIT(sfan);
3684
3685 if (gfan_handle) {
3686 /* 570, 600e/x, 770e, 770x */
3687 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3688 } else {
3689 /* all other ThinkPads: note that even old-style
3690 * ThinkPad ECs supports the fan control register */
3691 if (likely(acpi_ec_read(fan_status_offset,
3692 &fan_control_initial_status))) {
3693 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3694
3695 /* In some ThinkPads, neither the EC nor the ACPI
3696 * DSDT initialize the fan status, and it ends up
3697 * being set to 0x07 when it *could* be either
3698 * 0x07 or 0x80.
3699 *
3700 * Enable for TP-1Y (T43), TP-78 (R51e),
3701 * TP-76 (R52), TP-70 (T43, R52), which are known
3702 * to be buggy. */
3703 if (fan_control_initial_status == 0x07) {
3704 switch (thinkpad_id.ec_model) {
3705 case 0x5931: /* TP-1Y */
3706 case 0x3837: /* TP-78 */
3707 case 0x3637: /* TP-76 */
3708 case 0x3037: /* TP-70 */
3709 printk(IBM_NOTICE
3710 "fan_init: initial fan status is "
3711 "unknown, assuming it is in auto "
3712 "mode\n");
3713 tp_features.fan_ctrl_status_undef = 1;
3714 ;;
3715 }
3716 }
3717 } else {
3718 printk(IBM_ERR
3719 "ThinkPad ACPI EC access misbehaving, "
3720 "fan status and control unavailable\n");
3721 return 1;
3722 }
3723 }
3724
3725 if (sfan_handle) {
3726 /* 570, 770x-JL */
3727 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3728 fan_control_commands |=
3729 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3730 } else {
3731 if (!gfan_handle) {
3732 /* gfan without sfan means no fan control */
3733 /* all other models implement TP EC 0x2f control */
3734
3735 if (fans_handle) {
3736 /* X31, X40, X41 */
3737 fan_control_access_mode =
3738 TPACPI_FAN_WR_ACPI_FANS;
3739 fan_control_commands |=
3740 TPACPI_FAN_CMD_SPEED |
3741 TPACPI_FAN_CMD_LEVEL |
3742 TPACPI_FAN_CMD_ENABLE;
3743 } else {
3744 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3745 fan_control_commands |=
3746 TPACPI_FAN_CMD_LEVEL |
3747 TPACPI_FAN_CMD_ENABLE;
3748 }
3749 }
3750 }
3751
3752 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3753 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3754 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3755 fan_status_access_mode, fan_control_access_mode);
3756
3757 /* fan control master switch */
3758 if (!fan_control_allowed) {
3759 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3760 fan_control_commands = 0;
3761 dbg_printk(TPACPI_DBG_INIT,
3762 "fan control features disabled by parameter\n");
3763 }
3764
3765 /* update fan_control_desired_level */
3766 if (fan_status_access_mode != TPACPI_FAN_NONE)
3767 fan_get_status_safe(NULL);
3768
3769 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3770 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3771 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3772 &fan_attr_group);
3773 if (!(rc < 0))
3774 rc = driver_create_file(&tpacpi_pdriver.driver,
3775 &driver_attr_fan_watchdog);
3776 if (rc < 0)
3777 return rc;
3778 return 0;
3779 } else
3780 return 1;
3781 }
3782
3783 /*
3784 * Call with fan_mutex held
3785 */
3786 static void fan_update_desired_level(u8 status)
3787 {
3788 if ((status &
3789 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3790 if (status > 7)
3791 fan_control_desired_level = 7;
3792 else
3793 fan_control_desired_level = status;
3794 }
3795 }
3796
3797 static int fan_get_status(u8 *status)
3798 {
3799 u8 s;
3800
3801 /* TODO:
3802 * Add TPACPI_FAN_RD_ACPI_FANS ? */
3803
3804 switch (fan_status_access_mode) {
3805 case TPACPI_FAN_RD_ACPI_GFAN:
3806 /* 570, 600e/x, 770e, 770x */
3807
3808 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3809 return -EIO;
3810
3811 if (likely(status))
3812 *status = s & 0x07;
3813
3814 break;
3815
3816 case TPACPI_FAN_RD_TPEC:
3817 /* all except 570, 600e/x, 770e, 770x */
3818 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3819 return -EIO;
3820
3821 if (likely(status))
3822 *status = s;
3823
3824 break;
3825
3826 default:
3827 return -ENXIO;
3828 }
3829
3830 return 0;
3831 }
3832
3833 static int fan_get_status_safe(u8 *status)
3834 {
3835 int rc;
3836 u8 s;
3837
3838 rc = mutex_lock_interruptible(&fan_mutex);
3839 if (rc < 0)
3840 return rc;
3841 rc = fan_get_status(&s);
3842 if (!rc)
3843 fan_update_desired_level(s);
3844 mutex_unlock(&fan_mutex);
3845
3846 if (status)
3847 *status = s;
3848
3849 return rc;
3850 }
3851
3852 static void fan_exit(void)
3853 {
3854 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3855
3856 /* FIXME: can we really do this unconditionally? */
3857 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3858 driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3859
3860 cancel_delayed_work(&fan_watchdog_task);
3861 flush_scheduled_work();
3862 }
3863
3864 static int fan_get_speed(unsigned int *speed)
3865 {
3866 u8 hi, lo;
3867
3868 switch (fan_status_access_mode) {
3869 case TPACPI_FAN_RD_TPEC:
3870 /* all except 570, 600e/x, 770e, 770x */
3871 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3872 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3873 return -EIO;
3874
3875 if (likely(speed))
3876 *speed = (hi << 8) | lo;
3877
3878 break;
3879
3880 default:
3881 return -ENXIO;
3882 }
3883
3884 return 0;
3885 }
3886
3887 static void fan_watchdog_fire(struct work_struct *ignored)
3888 {
3889 int rc;
3890
3891 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3892 rc = fan_set_enable();
3893 if (rc < 0) {
3894 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3895 "will try again later...\n", -rc);
3896 /* reschedule for later */
3897 fan_watchdog_reset();
3898 }
3899 }
3900
3901 static void fan_watchdog_reset(void)
3902 {
3903 static int fan_watchdog_active;
3904
3905 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3906 return;
3907
3908 if (fan_watchdog_active)
3909 cancel_delayed_work(&fan_watchdog_task);
3910
3911 if (fan_watchdog_maxinterval > 0) {
3912 fan_watchdog_active = 1;
3913 if (!schedule_delayed_work(&fan_watchdog_task,
3914 msecs_to_jiffies(fan_watchdog_maxinterval
3915 * 1000))) {
3916 printk(IBM_ERR "failed to schedule the fan watchdog, "
3917 "watchdog will not trigger\n");
3918 }
3919 } else
3920 fan_watchdog_active = 0;
3921 }
3922
3923 static int fan_set_level(int level)
3924 {
3925 if (!fan_control_allowed)
3926 return -EPERM;
3927
3928 switch (fan_control_access_mode) {
3929 case TPACPI_FAN_WR_ACPI_SFAN:
3930 if (level >= 0 && level <= 7) {
3931 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3932 return -EIO;
3933 } else
3934 return -EINVAL;
3935 break;
3936
3937 case TPACPI_FAN_WR_ACPI_FANS:
3938 case TPACPI_FAN_WR_TPEC:
3939 if ((level != TP_EC_FAN_AUTO) &&
3940 (level != TP_EC_FAN_FULLSPEED) &&
3941 ((level < 0) || (level > 7)))
3942 return -EINVAL;
3943
3944 /* safety net should the EC not support AUTO
3945 * or FULLSPEED mode bits and just ignore them */
3946 if (level & TP_EC_FAN_FULLSPEED)
3947 level |= 7; /* safety min speed 7 */
3948 else if (level & TP_EC_FAN_FULLSPEED)
3949 level |= 4; /* safety min speed 4 */
3950
3951 if (!acpi_ec_write(fan_status_offset, level))
3952 return -EIO;
3953 else
3954 tp_features.fan_ctrl_status_undef = 0;
3955 break;
3956
3957 default:
3958 return -ENXIO;
3959 }
3960 return 0;
3961 }
3962
3963 static int fan_set_level_safe(int level)
3964 {
3965 int rc;
3966
3967 if (!fan_control_allowed)
3968 return -EPERM;
3969
3970 rc = mutex_lock_interruptible(&fan_mutex);
3971 if (rc < 0)
3972 return rc;
3973
3974 if (level == TPACPI_FAN_LAST_LEVEL)
3975 level = fan_control_desired_level;
3976
3977 rc = fan_set_level(level);
3978 if (!rc)
3979 fan_update_desired_level(level);
3980
3981 mutex_unlock(&fan_mutex);
3982 return rc;
3983 }
3984
3985 static int fan_set_enable(void)
3986 {
3987 u8 s;
3988 int rc;
3989
3990 if (!fan_control_allowed)
3991 return -EPERM;
3992
3993 rc = mutex_lock_interruptible(&fan_mutex);
3994 if (rc < 0)
3995 return rc;
3996
3997 switch (fan_control_access_mode) {
3998 case TPACPI_FAN_WR_ACPI_FANS:
3999 case TPACPI_FAN_WR_TPEC:
4000 rc = fan_get_status(&s);
4001 if (rc < 0)
4002 break;
4003
4004 /* Don't go out of emergency fan mode */
4005 if (s != 7) {
4006 s &= 0x07;
4007 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4008 }
4009
4010 if (!acpi_ec_write(fan_status_offset, s))
4011 rc = -EIO;
4012 else {
4013 tp_features.fan_ctrl_status_undef = 0;
4014 rc = 0;
4015 }
4016 break;
4017
4018 case TPACPI_FAN_WR_ACPI_SFAN:
4019 rc = fan_get_status(&s);
4020 if (rc < 0)
4021 break;
4022
4023 s &= 0x07;
4024
4025 /* Set fan to at least level 4 */
4026 s |= 4;
4027
4028 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4029 rc= -EIO;
4030 else
4031 rc = 0;
4032 break;
4033
4034 default:
4035 rc = -ENXIO;
4036 }
4037
4038 mutex_unlock(&fan_mutex);
4039 return rc;
4040 }
4041
4042 static int fan_set_disable(void)
4043 {
4044 int rc;
4045
4046 if (!fan_control_allowed)
4047 return -EPERM;
4048
4049 rc = mutex_lock_interruptible(&fan_mutex);
4050 if (rc < 0)
4051 return rc;
4052
4053 rc = 0;
4054 switch (fan_control_access_mode) {
4055 case TPACPI_FAN_WR_ACPI_FANS:
4056 case TPACPI_FAN_WR_TPEC:
4057 if (!acpi_ec_write(fan_status_offset, 0x00))
4058 rc = -EIO;
4059 else {
4060 fan_control_desired_level = 0;
4061 tp_features.fan_ctrl_status_undef = 0;
4062 }
4063 break;
4064
4065 case TPACPI_FAN_WR_ACPI_SFAN:
4066 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4067 rc = -EIO;
4068 else
4069 fan_control_desired_level = 0;
4070 break;
4071
4072 default:
4073 rc = -ENXIO;
4074 }
4075
4076
4077 mutex_unlock(&fan_mutex);
4078 return rc;
4079 }
4080
4081 static int fan_set_speed(int speed)
4082 {
4083 int rc;
4084
4085 if (!fan_control_allowed)
4086 return -EPERM;
4087
4088 rc = mutex_lock_interruptible(&fan_mutex);
4089 if (rc < 0)
4090 return rc;
4091
4092 rc = 0;
4093 switch (fan_control_access_mode) {
4094 case TPACPI_FAN_WR_ACPI_FANS:
4095 if (speed >= 0 && speed <= 65535) {
4096 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4097 speed, speed, speed))
4098 rc = -EIO;
4099 } else
4100 rc = -EINVAL;
4101 break;
4102
4103 default:
4104 rc = -ENXIO;
4105 }
4106
4107 mutex_unlock(&fan_mutex);
4108 return rc;
4109 }
4110
4111 static int fan_read(char *p)
4112 {
4113 int len = 0;
4114 int rc;
4115 u8 status;
4116 unsigned int speed = 0;
4117
4118 switch (fan_status_access_mode) {
4119 case TPACPI_FAN_RD_ACPI_GFAN:
4120 /* 570, 600e/x, 770e, 770x */
4121 if ((rc = fan_get_status_safe(&status)) < 0)
4122 return rc;
4123
4124 len += sprintf(p + len, "status:\t\t%s\n"
4125 "level:\t\t%d\n",
4126 (status != 0) ? "enabled" : "disabled", status);
4127 break;
4128
4129 case TPACPI_FAN_RD_TPEC:
4130 /* all except 570, 600e/x, 770e, 770x */
4131 if ((rc = fan_get_status_safe(&status)) < 0)
4132 return rc;
4133
4134 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4135 if (status != fan_control_initial_status)
4136 tp_features.fan_ctrl_status_undef = 0;
4137 else
4138 /* Return most likely status. In fact, it
4139 * might be the only possible status */
4140 status = TP_EC_FAN_AUTO;
4141 }
4142
4143 len += sprintf(p + len, "status:\t\t%s\n",
4144 (status != 0) ? "enabled" : "disabled");
4145
4146 if ((rc = fan_get_speed(&speed)) < 0)
4147 return rc;
4148
4149 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4150
4151 if (status & TP_EC_FAN_FULLSPEED)
4152 /* Disengaged mode takes precedence */
4153 len += sprintf(p + len, "level:\t\tdisengaged\n");
4154 else if (status & TP_EC_FAN_AUTO)
4155 len += sprintf(p + len, "level:\t\tauto\n");
4156 else
4157 len += sprintf(p + len, "level:\t\t%d\n", status);
4158 break;
4159
4160 case TPACPI_FAN_NONE:
4161 default:
4162 len += sprintf(p + len, "status:\t\tnot supported\n");
4163 }
4164
4165 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4166 len += sprintf(p + len, "commands:\tlevel <level>");
4167
4168 switch (fan_control_access_mode) {
4169 case TPACPI_FAN_WR_ACPI_SFAN:
4170 len += sprintf(p + len, " (<level> is 0-7)\n");
4171 break;
4172
4173 default:
4174 len += sprintf(p + len, " (<level> is 0-7, "
4175 "auto, disengaged, full-speed)\n");
4176 break;
4177 }
4178 }
4179
4180 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4181 len += sprintf(p + len, "commands:\tenable, disable\n"
4182 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4183 "1-120 (seconds))\n");
4184
4185 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4186 len += sprintf(p + len, "commands:\tspeed <speed>"
4187 " (<speed> is 0-65535)\n");
4188
4189 return len;
4190 }
4191
4192 static int fan_write_cmd_level(const char *cmd, int *rc)
4193 {
4194 int level;
4195
4196 if (strlencmp(cmd, "level auto") == 0)
4197 level = TP_EC_FAN_AUTO;
4198 else if ((strlencmp(cmd, "level disengaged") == 0) |
4199 (strlencmp(cmd, "level full-speed") == 0))
4200 level = TP_EC_FAN_FULLSPEED;
4201 else if (sscanf(cmd, "level %d", &level) != 1)
4202 return 0;
4203
4204 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4205 printk(IBM_ERR "level command accepted for unsupported "
4206 "access mode %d", fan_control_access_mode);
4207
4208 return 1;
4209 }
4210
4211 static int fan_write_cmd_enable(const char *cmd, int *rc)
4212 {
4213 if (strlencmp(cmd, "enable") != 0)
4214 return 0;
4215
4216 if ((*rc = fan_set_enable()) == -ENXIO)
4217 printk(IBM_ERR "enable command accepted for unsupported "
4218 "access mode %d", fan_control_access_mode);
4219
4220 return 1;
4221 }
4222
4223 static int fan_write_cmd_disable(const char *cmd, int *rc)
4224 {
4225 if (strlencmp(cmd, "disable") != 0)
4226 return 0;
4227
4228 if ((*rc = fan_set_disable()) == -ENXIO)
4229 printk(IBM_ERR "disable command accepted for unsupported "
4230 "access mode %d", fan_control_access_mode);
4231
4232 return 1;
4233 }
4234
4235 static int fan_write_cmd_speed(const char *cmd, int *rc)
4236 {
4237 int speed;
4238
4239 /* TODO:
4240 * Support speed <low> <medium> <high> ? */
4241
4242 if (sscanf(cmd, "speed %d", &speed) != 1)
4243 return 0;
4244
4245 if ((*rc = fan_set_speed(speed)) == -ENXIO)
4246 printk(IBM_ERR "speed command accepted for unsupported "
4247 "access mode %d", fan_control_access_mode);
4248
4249 return 1;
4250 }
4251
4252 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4253 {
4254 int interval;
4255
4256 if (sscanf(cmd, "watchdog %d", &interval) != 1)
4257 return 0;
4258
4259 if (interval < 0 || interval > 120)
4260 *rc = -EINVAL;
4261 else
4262 fan_watchdog_maxinterval = interval;
4263
4264 return 1;
4265 }
4266
4267 static int fan_write(char *buf)
4268 {
4269 char *cmd;
4270 int rc = 0;
4271
4272 while (!rc && (cmd = next_cmd(&buf))) {
4273 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4274 fan_write_cmd_level(cmd, &rc)) &&
4275 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4276 (fan_write_cmd_enable(cmd, &rc) ||
4277 fan_write_cmd_disable(cmd, &rc) ||
4278 fan_write_cmd_watchdog(cmd, &rc))) &&
4279 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4280 fan_write_cmd_speed(cmd, &rc))
4281 )
4282 rc = -EINVAL;
4283 else if (!rc)
4284 fan_watchdog_reset();
4285 }
4286
4287 return rc;
4288 }
4289
4290 static struct ibm_struct fan_driver_data = {
4291 .name = "fan",
4292 .read = fan_read,
4293 .write = fan_write,
4294 .exit = fan_exit,
4295 };
4296
4297 /****************************************************************************
4298 ****************************************************************************
4299 *
4300 * Infrastructure
4301 *
4302 ****************************************************************************
4303 ****************************************************************************/
4304
4305 /* /proc support */
4306 static struct proc_dir_entry *proc_dir;
4307
4308 /* Subdriver registry */
4309 static LIST_HEAD(tpacpi_all_drivers);
4310
4311
4312 /*
4313 * Module and infrastructure proble, init and exit handling
4314 */
4315
4316 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4317 static const char * __init str_supported(int is_supported)
4318 {
4319 static char text_unsupported[] __initdata = "not supported";
4320
4321 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4322 }
4323 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4324
4325 static int __init ibm_init(struct ibm_init_struct *iibm)
4326 {
4327 int ret;
4328 struct ibm_struct *ibm = iibm->data;
4329 struct proc_dir_entry *entry;
4330
4331 BUG_ON(ibm == NULL);
4332
4333 INIT_LIST_HEAD(&ibm->all_drivers);
4334
4335 if (ibm->flags.experimental && !experimental)
4336 return 0;
4337
4338 dbg_printk(TPACPI_DBG_INIT,
4339 "probing for %s\n", ibm->name);
4340
4341 if (iibm->init) {
4342 ret = iibm->init(iibm);
4343 if (ret > 0)
4344 return 0; /* probe failed */
4345 if (ret)
4346 return ret;
4347
4348 ibm->flags.init_called = 1;
4349 }
4350
4351 if (ibm->acpi) {
4352 if (ibm->acpi->hid) {
4353 ret = register_tpacpi_subdriver(ibm);
4354 if (ret)
4355 goto err_out;
4356 }
4357
4358 if (ibm->acpi->notify) {
4359 ret = setup_acpi_notify(ibm);
4360 if (ret == -ENODEV) {
4361 printk(IBM_NOTICE "disabling subdriver %s\n",
4362 ibm->name);
4363 ret = 0;
4364 goto err_out;
4365 }
4366 if (ret < 0)
4367 goto err_out;
4368 }
4369 }
4370
4371 dbg_printk(TPACPI_DBG_INIT,
4372 "%s installed\n", ibm->name);
4373
4374 if (ibm->read) {
4375 entry = create_proc_entry(ibm->name,
4376 S_IFREG | S_IRUGO | S_IWUSR,
4377 proc_dir);
4378 if (!entry) {
4379 printk(IBM_ERR "unable to create proc entry %s\n",
4380 ibm->name);
4381 ret = -ENODEV;
4382 goto err_out;
4383 }
4384 entry->owner = THIS_MODULE;
4385 entry->data = ibm;
4386 entry->read_proc = &dispatch_procfs_read;
4387 if (ibm->write)
4388 entry->write_proc = &dispatch_procfs_write;
4389 ibm->flags.proc_created = 1;
4390 }
4391
4392 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4393
4394 return 0;
4395
4396 err_out:
4397 dbg_printk(TPACPI_DBG_INIT,
4398 "%s: at error exit path with result %d\n",
4399 ibm->name, ret);
4400
4401 ibm_exit(ibm);
4402 return (ret < 0)? ret : 0;
4403 }
4404
4405 static void ibm_exit(struct ibm_struct *ibm)
4406 {
4407 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4408
4409 list_del_init(&ibm->all_drivers);
4410
4411 if (ibm->flags.acpi_notify_installed) {
4412 dbg_printk(TPACPI_DBG_EXIT,
4413 "%s: acpi_remove_notify_handler\n", ibm->name);
4414 BUG_ON(!ibm->acpi);
4415 acpi_remove_notify_handler(*ibm->acpi->handle,
4416 ibm->acpi->type,
4417 dispatch_acpi_notify);
4418 ibm->flags.acpi_notify_installed = 0;
4419 ibm->flags.acpi_notify_installed = 0;
4420 }
4421
4422 if (ibm->flags.proc_created) {
4423 dbg_printk(TPACPI_DBG_EXIT,
4424 "%s: remove_proc_entry\n", ibm->name);
4425 remove_proc_entry(ibm->name, proc_dir);
4426 ibm->flags.proc_created = 0;
4427 }
4428
4429 if (ibm->flags.acpi_driver_registered) {
4430 dbg_printk(TPACPI_DBG_EXIT,
4431 "%s: acpi_bus_unregister_driver\n", ibm->name);
4432 BUG_ON(!ibm->acpi);
4433 acpi_bus_unregister_driver(ibm->acpi->driver);
4434 kfree(ibm->acpi->driver);
4435 ibm->acpi->driver = NULL;
4436 ibm->flags.acpi_driver_registered = 0;
4437 }
4438
4439 if (ibm->flags.init_called && ibm->exit) {
4440 ibm->exit();
4441 ibm->flags.init_called = 0;
4442 }
4443
4444 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4445 }
4446
4447 /* Probing */
4448
4449 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4450 {
4451 const struct dmi_device *dev = NULL;
4452 char ec_fw_string[18];
4453
4454 if (!tp)
4455 return;
4456
4457 memset(tp, 0, sizeof(*tp));
4458
4459 if (dmi_name_in_vendors("IBM"))
4460 tp->vendor = PCI_VENDOR_ID_IBM;
4461 else if (dmi_name_in_vendors("LENOVO"))
4462 tp->vendor = PCI_VENDOR_ID_LENOVO;
4463 else
4464 return;
4465
4466 tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4467 GFP_KERNEL);
4468 if (!tp->bios_version_str)
4469 return;
4470 tp->bios_model = tp->bios_version_str[0]
4471 | (tp->bios_version_str[1] << 8);
4472
4473 /*
4474 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4475 * X32 or newer, all Z series; Some models must have an
4476 * up-to-date BIOS or they will not be detected.
4477 *
4478 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4479 */
4480 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4481 if (sscanf(dev->name,
4482 "IBM ThinkPad Embedded Controller -[%17c",
4483 ec_fw_string) == 1) {
4484 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4485 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4486
4487 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4488 tp->ec_model = ec_fw_string[0]
4489 | (ec_fw_string[1] << 8);
4490 break;
4491 }
4492 }
4493
4494 tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4495 GFP_KERNEL);
4496 if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4497 kfree(tp->model_str);
4498 tp->model_str = NULL;
4499 }
4500 }
4501
4502 static int __init probe_for_thinkpad(void)
4503 {
4504 int is_thinkpad;
4505
4506 if (acpi_disabled)
4507 return -ENODEV;
4508
4509 /*
4510 * Non-ancient models have better DMI tagging, but very old models
4511 * don't.
4512 */
4513 is_thinkpad = (thinkpad_id.model_str != NULL);
4514
4515 /* ec is required because many other handles are relative to it */
4516 IBM_ACPIHANDLE_INIT(ec);
4517 if (!ec_handle) {
4518 if (is_thinkpad)
4519 printk(IBM_ERR
4520 "Not yet supported ThinkPad detected!\n");
4521 return -ENODEV;
4522 }
4523
4524 /*
4525 * Risks a regression on very old machines, but reduces potential
4526 * false positives a damn great deal
4527 */
4528 if (!is_thinkpad)
4529 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4530
4531 if (!is_thinkpad && !force_load)
4532 return -ENODEV;
4533
4534 return 0;
4535 }
4536
4537
4538 /* Module init, exit, parameters */
4539
4540 static struct ibm_init_struct ibms_init[] __initdata = {
4541 {
4542 .init = thinkpad_acpi_driver_init,
4543 .data = &thinkpad_acpi_driver_data,
4544 },
4545 {
4546 .init = hotkey_init,
4547 .data = &hotkey_driver_data,
4548 },
4549 {
4550 .init = bluetooth_init,
4551 .data = &bluetooth_driver_data,
4552 },
4553 {
4554 .init = wan_init,
4555 .data = &wan_driver_data,
4556 },
4557 {
4558 .init = video_init,
4559 .data = &video_driver_data,
4560 },
4561 {
4562 .init = light_init,
4563 .data = &light_driver_data,
4564 },
4565 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4566 {
4567 .init = dock_init,
4568 .data = &dock_driver_data[0],
4569 },
4570 {
4571 .init = dock_init2,
4572 .data = &dock_driver_data[1],
4573 },
4574 #endif
4575 #ifdef CONFIG_THINKPAD_ACPI_BAY
4576 {
4577 .init = bay_init,
4578 .data = &bay_driver_data,
4579 },
4580 #endif
4581 {
4582 .init = cmos_init,
4583 .data = &cmos_driver_data,
4584 },
4585 {
4586 .init = led_init,
4587 .data = &led_driver_data,
4588 },
4589 {
4590 .init = beep_init,
4591 .data = &beep_driver_data,
4592 },
4593 {
4594 .init = thermal_init,
4595 .data = &thermal_driver_data,
4596 },
4597 {
4598 .data = &ecdump_driver_data,
4599 },
4600 {
4601 .init = brightness_init,
4602 .data = &brightness_driver_data,
4603 },
4604 {
4605 .data = &volume_driver_data,
4606 },
4607 {
4608 .init = fan_init,
4609 .data = &fan_driver_data,
4610 },
4611 };
4612
4613 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4614 {
4615 unsigned int i;
4616 struct ibm_struct *ibm;
4617
4618 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4619 ibm = ibms_init[i].data;
4620 BUG_ON(ibm == NULL);
4621
4622 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4623 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4624 return -ENOSPC;
4625 strcpy(ibms_init[i].param, val);
4626 strcat(ibms_init[i].param, ",");
4627 return 0;
4628 }
4629 }
4630
4631 return -EINVAL;
4632 }
4633
4634 static int experimental;
4635 module_param(experimental, int, 0);
4636
4637 static u32 dbg_level;
4638 module_param_named(debug, dbg_level, uint, 0);
4639
4640 static int force_load;
4641 module_param(force_load, bool, 0);
4642
4643 static int fan_control_allowed;
4644 module_param_named(fan_control, fan_control_allowed, bool, 0);
4645
4646 static int brightness_mode;
4647 module_param_named(brightness_mode, brightness_mode, int, 0);
4648
4649 static unsigned int hotkey_report_mode;
4650 module_param(hotkey_report_mode, uint, 0);
4651
4652 #define IBM_PARAM(feature) \
4653 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4654
4655 IBM_PARAM(hotkey);
4656 IBM_PARAM(bluetooth);
4657 IBM_PARAM(video);
4658 IBM_PARAM(light);
4659 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4660 IBM_PARAM(dock);
4661 #endif
4662 #ifdef CONFIG_THINKPAD_ACPI_BAY
4663 IBM_PARAM(bay);
4664 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4665 IBM_PARAM(cmos);
4666 IBM_PARAM(led);
4667 IBM_PARAM(beep);
4668 IBM_PARAM(ecdump);
4669 IBM_PARAM(brightness);
4670 IBM_PARAM(volume);
4671 IBM_PARAM(fan);
4672
4673 static int __init thinkpad_acpi_module_init(void)
4674 {
4675 int ret, i;
4676
4677 /* Parameter checking */
4678 if (hotkey_report_mode > 2)
4679 return -EINVAL;
4680
4681 /* Driver-level probe */
4682
4683 get_thinkpad_model_data(&thinkpad_id);
4684 ret = probe_for_thinkpad();
4685 if (ret) {
4686 thinkpad_acpi_module_exit();
4687 return ret;
4688 }
4689
4690 /* Driver initialization */
4691
4692 IBM_ACPIHANDLE_INIT(ecrd);
4693 IBM_ACPIHANDLE_INIT(ecwr);
4694
4695 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4696 if (!proc_dir) {
4697 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4698 thinkpad_acpi_module_exit();
4699 return -ENODEV;
4700 }
4701 proc_dir->owner = THIS_MODULE;
4702
4703 ret = platform_driver_register(&tpacpi_pdriver);
4704 if (ret) {
4705 printk(IBM_ERR "unable to register platform driver\n");
4706 thinkpad_acpi_module_exit();
4707 return ret;
4708 }
4709 tp_features.platform_drv_registered = 1;
4710
4711 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4712 if (ret) {
4713 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4714 thinkpad_acpi_module_exit();
4715 return ret;
4716 }
4717 tp_features.platform_drv_attrs_registered = 1;
4718
4719
4720 /* Device initialization */
4721 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4722 NULL, 0);
4723 if (IS_ERR(tpacpi_pdev)) {
4724 ret = PTR_ERR(tpacpi_pdev);
4725 tpacpi_pdev = NULL;
4726 printk(IBM_ERR "unable to register platform device\n");
4727 thinkpad_acpi_module_exit();
4728 return ret;
4729 }
4730 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4731 if (IS_ERR(tpacpi_hwmon)) {
4732 ret = PTR_ERR(tpacpi_hwmon);
4733 tpacpi_hwmon = NULL;
4734 printk(IBM_ERR "unable to register hwmon device\n");
4735 thinkpad_acpi_module_exit();
4736 return ret;
4737 }
4738 tpacpi_inputdev = input_allocate_device();
4739 if (!tpacpi_inputdev) {
4740 printk(IBM_ERR "unable to allocate input device\n");
4741 thinkpad_acpi_module_exit();
4742 return -ENOMEM;
4743 } else {
4744 /* Prepare input device, but don't register */
4745 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4746 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4747 tpacpi_inputdev->id.bustype = BUS_HOST;
4748 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
4749 thinkpad_id.vendor :
4750 PCI_VENDOR_ID_IBM;
4751 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4752 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4753 }
4754 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4755 ret = ibm_init(&ibms_init[i]);
4756 if (ret >= 0 && *ibms_init[i].param)
4757 ret = ibms_init[i].data->write(ibms_init[i].param);
4758 if (ret < 0) {
4759 thinkpad_acpi_module_exit();
4760 return ret;
4761 }
4762 }
4763 ret = input_register_device(tpacpi_inputdev);
4764 if (ret < 0) {
4765 printk(IBM_ERR "unable to register input device\n");
4766 thinkpad_acpi_module_exit();
4767 return ret;
4768 } else {
4769 tp_features.input_device_registered = 1;
4770 }
4771
4772 return 0;
4773 }
4774
4775 static void thinkpad_acpi_module_exit(void)
4776 {
4777 struct ibm_struct *ibm, *itmp;
4778
4779 list_for_each_entry_safe_reverse(ibm, itmp,
4780 &tpacpi_all_drivers,
4781 all_drivers) {
4782 ibm_exit(ibm);
4783 }
4784
4785 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4786
4787 if (tpacpi_inputdev) {
4788 if (tp_features.input_device_registered)
4789 input_unregister_device(tpacpi_inputdev);
4790 else
4791 input_free_device(tpacpi_inputdev);
4792 }
4793
4794 if (tpacpi_hwmon)
4795 hwmon_device_unregister(tpacpi_hwmon);
4796
4797 if (tpacpi_pdev)
4798 platform_device_unregister(tpacpi_pdev);
4799
4800 if (tp_features.platform_drv_attrs_registered)
4801 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4802
4803 if (tp_features.platform_drv_registered)
4804 platform_driver_unregister(&tpacpi_pdriver);
4805
4806 if (proc_dir)
4807 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4808
4809 kfree(thinkpad_id.bios_version_str);
4810 kfree(thinkpad_id.ec_version_str);
4811 kfree(thinkpad_id.model_str);
4812 }
4813
4814 module_init(thinkpad_acpi_module_init);
4815 module_exit(thinkpad_acpi_module_exit);
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