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ACPI: thinkpad-acpi: allow use of CMOS NVRAM for brightness control
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / misc / thinkpad_acpi.c
blob5318eb272c61b220cd3c61a63ed1ae62465fcad2
1 /*
2 * thinkpad_acpi.c - ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24 #define IBM_VERSION "0.14"
25 #define TPACPI_SYSFS_VERSION 0x010000
26
27 /*
28 * Changelog:
29 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to
30 * drivers/misc.
31 *
32 * 2006-11-22 0.13 new maintainer
33 * changelog now lives in git commit history, and will
34 * not be updated further in-file.
35 *
36 * 2005-08-17 0.12 fix compilation on 2.6.13-rc kernels
37 * 2005-03-17 0.11 support for 600e, 770x
38 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
39 * support for 770e, G41
40 * G40 and G41 don't have a thinklight
41 * temperatures no longer experimental
42 * experimental brightness control
43 * experimental volume control
44 * experimental fan enable/disable
45 * 2005-01-16 0.10 fix module loading on R30, R31
46 * 2005-01-16 0.9 support for 570, R30, R31
47 * ultrabay support on A22p, A3x
48 * limit arg for cmos, led, beep, drop experimental status
49 * more capable led control on A21e, A22p, T20-22, X20
50 * experimental temperatures and fan speed
51 * experimental embedded controller register dump
52 * mark more functions as __init, drop incorrect __exit
53 * use MODULE_VERSION
54 * thanks to Henrik Brix Andersen <brix@gentoo.org>
55 * fix parameter passing on module loading
56 * thanks to Rusty Russell <rusty@rustcorp.com.au>
57 * thanks to Jim Radford <radford@blackbean.org>
58 * 2004-11-08 0.8 fix init error case, don't return from a macro
59 * thanks to Chris Wright <chrisw@osdl.org>
60 * 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
61 * fix led control on A21e
62 * 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
63 * 2004-10-18 0.5 thinklight support on A21e, G40, R32, T20, T21, X20
64 * proc file format changed
65 * video_switch command
66 * experimental cmos control
67 * experimental led control
68 * experimental acpi sounds
69 * 2004-09-16 0.4 support for module parameters
70 * hotkey mask can be prefixed by 0x
71 * video output switching
72 * video expansion control
73 * ultrabay eject support
74 * removed lcd brightness/on/off control, didn't work
75 * 2004-08-17 0.3 support for R40
76 * lcd off, brightness control
77 * thinklight on/off
78 * 2004-08-14 0.2 support for T series, X20
79 * bluetooth enable/disable
80 * hotkey events disabled by default
81 * removed fan control, currently useless
82 * 2004-08-09 0.1 initial release, support for X series
83 */
84
85 #include "thinkpad_acpi.h"
86
87 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
88 MODULE_DESCRIPTION(IBM_DESC);
89 MODULE_VERSION(IBM_VERSION);
90 MODULE_LICENSE("GPL");
91
92 /* Please remove this in year 2009 */
93 MODULE_ALIAS("ibm_acpi");
94
95 /*
96 * DMI matching for module autoloading
97 *
98 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
99 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
100 *
101 * Only models listed in thinkwiki will be supported, so add yours
102 * if it is not there yet.
103 */
104 #define IBM_BIOS_MODULE_ALIAS(__type) \
105 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
106
107 /* Non-ancient thinkpads */
108 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
109 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
110
111 /* Ancient thinkpad BIOSes have to be identified by
112 * BIOS type or model number, and there are far less
113 * BIOS types than model numbers... */
114 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
115 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
116 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
117
118 #define __unused __attribute__ ((unused))
119
120 /****************************************************************************
121 ****************************************************************************
122 *
123 * ACPI Helpers and device model
124 *
125 ****************************************************************************
126 ****************************************************************************/
127
128 /*************************************************************************
129 * ACPI basic handles
130 */
131
132 static acpi_handle root_handle;
133
134 #define IBM_HANDLE(object, parent, paths...) \
135 static acpi_handle object##_handle; \
136 static acpi_handle *object##_parent = &parent##_handle; \
137 static char *object##_path; \
138 static char *object##_paths[] = { paths }
139
140 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
141 "\\_SB.PCI.ISA.EC", /* 570 */
142 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
143 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
144 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
145 "\\_SB.PCI0.ICH3.EC0", /* R31 */
146 "\\_SB.PCI0.LPC.EC", /* all others */
147 );
148
149 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
150 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
151
152
153 /*************************************************************************
154 * Misc ACPI handles
155 */
156
157 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
158 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
159 "\\CMS", /* R40, R40e */
160 ); /* all others */
161
162 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
163 "^HKEY", /* R30, R31 */
164 "HKEY", /* all others */
165 ); /* 570 */
166
167
168 /*************************************************************************
169 * ACPI helpers
170 */
171
172 static int acpi_evalf(acpi_handle handle,
173 void *res, char *method, char *fmt, ...)
174 {
175 char *fmt0 = fmt;
176 struct acpi_object_list params;
177 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
178 struct acpi_buffer result, *resultp;
179 union acpi_object out_obj;
180 acpi_status status;
181 va_list ap;
182 char res_type;
183 int success;
184 int quiet;
185
186 if (!*fmt) {
187 printk(IBM_ERR "acpi_evalf() called with empty format\n");
188 return 0;
189 }
190
191 if (*fmt == 'q') {
192 quiet = 1;
193 fmt++;
194 } else
195 quiet = 0;
196
197 res_type = *(fmt++);
198
199 params.count = 0;
200 params.pointer = &in_objs[0];
201
202 va_start(ap, fmt);
203 while (*fmt) {
204 char c = *(fmt++);
205 switch (c) {
206 case 'd': /* int */
207 in_objs[params.count].integer.value = va_arg(ap, int);
208 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
209 break;
210 /* add more types as needed */
211 default:
212 printk(IBM_ERR "acpi_evalf() called "
213 "with invalid format character '%c'\n", c);
214 return 0;
215 }
216 }
217 va_end(ap);
218
219 if (res_type != 'v') {
220 result.length = sizeof(out_obj);
221 result.pointer = &out_obj;
222 resultp = &result;
223 } else
224 resultp = NULL;
225
226 status = acpi_evaluate_object(handle, method, &params, resultp);
227
228 switch (res_type) {
229 case 'd': /* int */
230 if (res)
231 *(int *)res = out_obj.integer.value;
232 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
233 break;
234 case 'v': /* void */
235 success = status == AE_OK;
236 break;
237 /* add more types as needed */
238 default:
239 printk(IBM_ERR "acpi_evalf() called "
240 "with invalid format character '%c'\n", res_type);
241 return 0;
242 }
243
244 if (!success && !quiet)
245 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
246 method, fmt0, status);
247
248 return success;
249 }
250
251 static void __unused acpi_print_int(acpi_handle handle, char *method)
252 {
253 int i;
254
255 if (acpi_evalf(handle, &i, method, "d"))
256 printk(IBM_INFO "%s = 0x%x\n", method, i);
257 else
258 printk(IBM_ERR "error calling %s\n", method);
259 }
260
261 static int acpi_ec_read(int i, u8 * p)
262 {
263 int v;
264
265 if (ecrd_handle) {
266 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
267 return 0;
268 *p = v;
269 } else {
270 if (ec_read(i, p) < 0)
271 return 0;
272 }
273
274 return 1;
275 }
276
277 static int acpi_ec_write(int i, u8 v)
278 {
279 if (ecwr_handle) {
280 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
281 return 0;
282 } else {
283 if (ec_write(i, v) < 0)
284 return 0;
285 }
286
287 return 1;
288 }
289
290 static int _sta(acpi_handle handle)
291 {
292 int status;
293
294 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
295 status = 0;
296
297 return status;
298 }
299
300 static int issue_thinkpad_cmos_command(int cmos_cmd)
301 {
302 if (!cmos_handle)
303 return -ENXIO;
304
305 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
306 return -EIO;
307
308 return 0;
309 }
310
311 /*************************************************************************
312 * ACPI device model
313 */
314
315 static void drv_acpi_handle_init(char *name,
316 acpi_handle *handle, acpi_handle parent,
317 char **paths, int num_paths, char **path)
318 {
319 int i;
320 acpi_status status;
321
322 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
323 name);
324
325 for (i = 0; i < num_paths; i++) {
326 status = acpi_get_handle(parent, paths[i], handle);
327 if (ACPI_SUCCESS(status)) {
328 *path = paths[i];
329 dbg_printk(TPACPI_DBG_INIT,
330 "Found ACPI handle %s for %s\n",
331 *path, name);
332 return;
333 }
334 }
335
336 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
337 name);
338 *handle = NULL;
339 }
340
341 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
342 {
343 struct ibm_struct *ibm = data;
344
345 if (!ibm || !ibm->acpi || !ibm->acpi->notify)
346 return;
347
348 ibm->acpi->notify(ibm, event);
349 }
350
351 static int __init setup_acpi_notify(struct ibm_struct *ibm)
352 {
353 acpi_status status;
354 int rc;
355
356 BUG_ON(!ibm->acpi);
357
358 if (!*ibm->acpi->handle)
359 return 0;
360
361 vdbg_printk(TPACPI_DBG_INIT,
362 "setting up ACPI notify for %s\n", ibm->name);
363
364 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
365 if (rc < 0) {
366 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
367 ibm->name, rc);
368 return -ENODEV;
369 }
370
371 acpi_driver_data(ibm->acpi->device) = ibm;
372 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
373 IBM_ACPI_EVENT_PREFIX,
374 ibm->name);
375
376 status = acpi_install_notify_handler(*ibm->acpi->handle,
377 ibm->acpi->type, dispatch_acpi_notify, ibm);
378 if (ACPI_FAILURE(status)) {
379 if (status == AE_ALREADY_EXISTS) {
380 printk(IBM_NOTICE "another device driver is already handling %s events\n",
381 ibm->name);
382 } else {
383 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
384 ibm->name, status);
385 }
386 return -ENODEV;
387 }
388 ibm->flags.acpi_notify_installed = 1;
389 return 0;
390 }
391
392 static int __init tpacpi_device_add(struct acpi_device *device)
393 {
394 return 0;
395 }
396
397 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
398 {
399 int rc;
400
401 dbg_printk(TPACPI_DBG_INIT,
402 "registering %s as an ACPI driver\n", ibm->name);
403
404 BUG_ON(!ibm->acpi);
405
406 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
407 if (!ibm->acpi->driver) {
408 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
409 return -ENOMEM;
410 }
411
412 sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
413 ibm->acpi->driver->ids = ibm->acpi->hid;
414 ibm->acpi->driver->ops.add = &tpacpi_device_add;
415
416 rc = acpi_bus_register_driver(ibm->acpi->driver);
417 if (rc < 0) {
418 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
419 ibm->acpi->hid, rc);
420 kfree(ibm->acpi->driver);
421 ibm->acpi->driver = NULL;
422 } else if (!rc)
423 ibm->flags.acpi_driver_registered = 1;
424
425 return rc;
426 }
427
428
429 /****************************************************************************
430 ****************************************************************************
431 *
432 * Procfs Helpers
433 *
434 ****************************************************************************
435 ****************************************************************************/
436
437 static int dispatch_procfs_read(char *page, char **start, off_t off,
438 int count, int *eof, void *data)
439 {
440 struct ibm_struct *ibm = data;
441 int len;
442
443 if (!ibm || !ibm->read)
444 return -EINVAL;
445
446 len = ibm->read(page);
447 if (len < 0)
448 return len;
449
450 if (len <= off + count)
451 *eof = 1;
452 *start = page + off;
453 len -= off;
454 if (len > count)
455 len = count;
456 if (len < 0)
457 len = 0;
458
459 return len;
460 }
461
462 static int dispatch_procfs_write(struct file *file,
463 const char __user * userbuf,
464 unsigned long count, void *data)
465 {
466 struct ibm_struct *ibm = data;
467 char *kernbuf;
468 int ret;
469
470 if (!ibm || !ibm->write)
471 return -EINVAL;
472
473 kernbuf = kmalloc(count + 2, GFP_KERNEL);
474 if (!kernbuf)
475 return -ENOMEM;
476
477 if (copy_from_user(kernbuf, userbuf, count)) {
478 kfree(kernbuf);
479 return -EFAULT;
480 }
481
482 kernbuf[count] = 0;
483 strcat(kernbuf, ",");
484 ret = ibm->write(kernbuf);
485 if (ret == 0)
486 ret = count;
487
488 kfree(kernbuf);
489
490 return ret;
491 }
492
493 static char *next_cmd(char **cmds)
494 {
495 char *start = *cmds;
496 char *end;
497
498 while ((end = strchr(start, ',')) && end == start)
499 start = end + 1;
500
501 if (!end)
502 return NULL;
503
504 *end = 0;
505 *cmds = end + 1;
506 return start;
507 }
508
509
510 /****************************************************************************
511 ****************************************************************************
512 *
513 * Device model: input, hwmon and platform
514 *
515 ****************************************************************************
516 ****************************************************************************/
517
518 static struct platform_device *tpacpi_pdev;
519 static struct class_device *tpacpi_hwmon;
520 static struct input_dev *tpacpi_inputdev;
521
522
523 static int tpacpi_resume_handler(struct platform_device *pdev)
524 {
525 struct ibm_struct *ibm, *itmp;
526
527 list_for_each_entry_safe(ibm, itmp,
528 &tpacpi_all_drivers,
529 all_drivers) {
530 if (ibm->resume)
531 (ibm->resume)();
532 }
533
534 return 0;
535 }
536
537 static struct platform_driver tpacpi_pdriver = {
538 .driver = {
539 .name = IBM_DRVR_NAME,
540 .owner = THIS_MODULE,
541 },
542 .resume = tpacpi_resume_handler,
543 };
544
545
546 /*************************************************************************
547 * thinkpad-acpi driver attributes
548 */
549
550 /* interface_version --------------------------------------------------- */
551 static ssize_t tpacpi_driver_interface_version_show(
552 struct device_driver *drv,
553 char *buf)
554 {
555 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
556 }
557
558 static DRIVER_ATTR(interface_version, S_IRUGO,
559 tpacpi_driver_interface_version_show, NULL);
560
561 /* debug_level --------------------------------------------------------- */
562 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
563 char *buf)
564 {
565 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
566 }
567
568 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
569 const char *buf, size_t count)
570 {
571 unsigned long t;
572
573 if (parse_strtoul(buf, 0xffff, &t))
574 return -EINVAL;
575
576 dbg_level = t;
577
578 return count;
579 }
580
581 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
582 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
583
584 /* version ------------------------------------------------------------- */
585 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
586 char *buf)
587 {
588 return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
589 }
590
591 static DRIVER_ATTR(version, S_IRUGO,
592 tpacpi_driver_version_show, NULL);
593
594 /* --------------------------------------------------------------------- */
595
596 static struct driver_attribute* tpacpi_driver_attributes[] = {
597 &driver_attr_debug_level, &driver_attr_version,
598 &driver_attr_interface_version,
599 };
600
601 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
602 {
603 int i, res;
604
605 i = 0;
606 res = 0;
607 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
608 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
609 i++;
610 }
611
612 return res;
613 }
614
615 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
616 {
617 int i;
618
619 for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
620 driver_remove_file(drv, tpacpi_driver_attributes[i]);
621 }
622
623 /*************************************************************************
624 * sysfs support helpers
625 */
626
627 struct attribute_set_obj {
628 struct attribute_set s;
629 struct attribute *a;
630 } __attribute__((packed));
631
632 static struct attribute_set *create_attr_set(unsigned int max_members,
633 const char* name)
634 {
635 struct attribute_set_obj *sobj;
636
637 if (max_members == 0)
638 return NULL;
639
640 /* Allocates space for implicit NULL at the end too */
641 sobj = kzalloc(sizeof(struct attribute_set_obj) +
642 max_members * sizeof(struct attribute *),
643 GFP_KERNEL);
644 if (!sobj)
645 return NULL;
646 sobj->s.max_members = max_members;
647 sobj->s.group.attrs = &sobj->a;
648 sobj->s.group.name = name;
649
650 return &sobj->s;
651 }
652
653 /* not multi-threaded safe, use it in a single thread per set */
654 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
655 {
656 if (!s || !attr)
657 return -EINVAL;
658
659 if (s->members >= s->max_members)
660 return -ENOMEM;
661
662 s->group.attrs[s->members] = attr;
663 s->members++;
664
665 return 0;
666 }
667
668 static int add_many_to_attr_set(struct attribute_set* s,
669 struct attribute **attr,
670 unsigned int count)
671 {
672 int i, res;
673
674 for (i = 0; i < count; i++) {
675 res = add_to_attr_set(s, attr[i]);
676 if (res)
677 return res;
678 }
679
680 return 0;
681 }
682
683 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
684 {
685 sysfs_remove_group(kobj, &s->group);
686 destroy_attr_set(s);
687 }
688
689 static int parse_strtoul(const char *buf,
690 unsigned long max, unsigned long *value)
691 {
692 char *endp;
693
694 *value = simple_strtoul(buf, &endp, 0);
695 while (*endp && isspace(*endp))
696 endp++;
697 if (*endp || *value > max)
698 return -EINVAL;
699
700 return 0;
701 }
702
703 /****************************************************************************
704 ****************************************************************************
705 *
706 * Subdrivers
707 *
708 ****************************************************************************
709 ****************************************************************************/
710
711 /*************************************************************************
712 * thinkpad-acpi init subdriver
713 */
714
715 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
716 {
717 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
718 printk(IBM_INFO "%s\n", IBM_URL);
719
720 printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
721 (thinkpad_id.bios_version_str) ?
722 thinkpad_id.bios_version_str : "unknown",
723 (thinkpad_id.ec_version_str) ?
724 thinkpad_id.ec_version_str : "unknown");
725
726 if (thinkpad_id.vendor && thinkpad_id.model_str)
727 printk(IBM_INFO "%s %s\n",
728 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
729 "IBM" : ((thinkpad_id.vendor ==
730 PCI_VENDOR_ID_LENOVO) ?
731 "Lenovo" : "Unknown vendor"),
732 thinkpad_id.model_str);
733
734 return 0;
735 }
736
737 static int thinkpad_acpi_driver_read(char *p)
738 {
739 int len = 0;
740
741 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
742 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
743
744 return len;
745 }
746
747 static struct ibm_struct thinkpad_acpi_driver_data = {
748 .name = "driver",
749 .read = thinkpad_acpi_driver_read,
750 };
751
752 /*************************************************************************
753 * Hotkey subdriver
754 */
755
756 static int hotkey_orig_status;
757 static u32 hotkey_orig_mask;
758 static u32 hotkey_all_mask;
759 static u32 hotkey_reserved_mask;
760
761 static u16 hotkey_keycode_map[] = {
762 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
763 KEY_FN_F1, KEY_FN_F2, KEY_FN_F3, KEY_SLEEP,
764 KEY_FN_F5, KEY_FN_F6, KEY_FN_F7, KEY_FN_F8,
765 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
766 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
767 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
768 KEY_UNKNOWN, /* 0x0D: FN+INSERT */
769 KEY_UNKNOWN, /* 0x0E: FN+DELETE */
770 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
771 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
772 KEY_RESERVED, /* 0x10: FN+END (brightness down) */
773 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
774 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
775 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
776 KEY_RESERVED, /* 0x14: VOLUME UP */
777 KEY_RESERVED, /* 0x15: VOLUME DOWN */
778 KEY_RESERVED, /* 0x16: MUTE */
779 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
780 /* (assignments unknown, please report if found) */
781 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
782 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
783 };
784
785 static struct attribute_set *hotkey_dev_attributes;
786
787 static int hotkey_get_wlsw(int *status)
788 {
789 if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
790 return -EIO;
791 return 0;
792 }
793
794 /* sysfs hotkey enable ------------------------------------------------- */
795 static ssize_t hotkey_enable_show(struct device *dev,
796 struct device_attribute *attr,
797 char *buf)
798 {
799 int res, status;
800 u32 mask;
801
802 res = hotkey_get(&status, &mask);
803 if (res)
804 return res;
805
806 return snprintf(buf, PAGE_SIZE, "%d\n", status);
807 }
808
809 static ssize_t hotkey_enable_store(struct device *dev,
810 struct device_attribute *attr,
811 const char *buf, size_t count)
812 {
813 unsigned long t;
814 int res, status;
815 u32 mask;
816
817 if (parse_strtoul(buf, 1, &t))
818 return -EINVAL;
819
820 res = hotkey_get(&status, &mask);
821 if (!res)
822 res = hotkey_set(t, mask);
823
824 return (res) ? res : count;
825 }
826
827 static struct device_attribute dev_attr_hotkey_enable =
828 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
829 hotkey_enable_show, hotkey_enable_store);
830
831 /* sysfs hotkey mask --------------------------------------------------- */
832 static ssize_t hotkey_mask_show(struct device *dev,
833 struct device_attribute *attr,
834 char *buf)
835 {
836 int res, status;
837 u32 mask;
838
839 res = hotkey_get(&status, &mask);
840 if (res)
841 return res;
842
843 return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
844 }
845
846 static ssize_t hotkey_mask_store(struct device *dev,
847 struct device_attribute *attr,
848 const char *buf, size_t count)
849 {
850 unsigned long t;
851 int res, status;
852 u32 mask;
853
854 if (parse_strtoul(buf, 0xffffffffUL, &t))
855 return -EINVAL;
856
857 res = hotkey_get(&status, &mask);
858 if (!res)
859 hotkey_set(status, t);
860
861 return (res) ? res : count;
862 }
863
864 static struct device_attribute dev_attr_hotkey_mask =
865 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
866 hotkey_mask_show, hotkey_mask_store);
867
868 /* sysfs hotkey bios_enabled ------------------------------------------- */
869 static ssize_t hotkey_bios_enabled_show(struct device *dev,
870 struct device_attribute *attr,
871 char *buf)
872 {
873 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
874 }
875
876 static struct device_attribute dev_attr_hotkey_bios_enabled =
877 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
878
879 /* sysfs hotkey bios_mask ---------------------------------------------- */
880 static ssize_t hotkey_bios_mask_show(struct device *dev,
881 struct device_attribute *attr,
882 char *buf)
883 {
884 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
885 }
886
887 static struct device_attribute dev_attr_hotkey_bios_mask =
888 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
889
890 /* sysfs hotkey all_mask ----------------------------------------------- */
891 static ssize_t hotkey_all_mask_show(struct device *dev,
892 struct device_attribute *attr,
893 char *buf)
894 {
895 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
896 }
897
898 static struct device_attribute dev_attr_hotkey_all_mask =
899 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
900
901 /* sysfs hotkey recommended_mask --------------------------------------- */
902 static ssize_t hotkey_recommended_mask_show(struct device *dev,
903 struct device_attribute *attr,
904 char *buf)
905 {
906 return snprintf(buf, PAGE_SIZE, "0x%08x\n",
907 hotkey_all_mask & ~hotkey_reserved_mask);
908 }
909
910 static struct device_attribute dev_attr_hotkey_recommended_mask =
911 __ATTR(hotkey_recommended_mask, S_IRUGO,
912 hotkey_recommended_mask_show, NULL);
913
914 /* sysfs hotkey radio_sw ----------------------------------------------- */
915 static ssize_t hotkey_radio_sw_show(struct device *dev,
916 struct device_attribute *attr,
917 char *buf)
918 {
919 int res, s;
920 res = hotkey_get_wlsw(&s);
921 if (res < 0)
922 return res;
923
924 return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
925 }
926
927 static struct device_attribute dev_attr_hotkey_radio_sw =
928 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
929
930 /* --------------------------------------------------------------------- */
931
932 static struct attribute *hotkey_mask_attributes[] = {
933 &dev_attr_hotkey_mask.attr,
934 &dev_attr_hotkey_bios_enabled.attr,
935 &dev_attr_hotkey_bios_mask.attr,
936 &dev_attr_hotkey_all_mask.attr,
937 &dev_attr_hotkey_recommended_mask.attr,
938 };
939
940 static int __init hotkey_init(struct ibm_init_struct *iibm)
941 {
942 int res, i;
943 int status;
944
945 vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
946
947 BUG_ON(!tpacpi_inputdev);
948
949 IBM_ACPIHANDLE_INIT(hkey);
950 mutex_init(&hotkey_mutex);
951
952 /* hotkey not supported on 570 */
953 tp_features.hotkey = hkey_handle != NULL;
954
955 vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
956 str_supported(tp_features.hotkey));
957
958 if (tp_features.hotkey) {
959 hotkey_dev_attributes = create_attr_set(7, NULL);
960 if (!hotkey_dev_attributes)
961 return -ENOMEM;
962 res = add_to_attr_set(hotkey_dev_attributes,
963 &dev_attr_hotkey_enable.attr);
964 if (res)
965 return res;
966
967 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
968 A30, R30, R31, T20-22, X20-21, X22-24 */
969 tp_features.hotkey_mask =
970 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
971
972 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
973 str_supported(tp_features.hotkey_mask));
974
975 if (tp_features.hotkey_mask) {
976 /* MHKA available in A31, R40, R40e, T4x, X31, and later */
977 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
978 "MHKA", "qd"))
979 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
980 }
981
982 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
983 if (!res && tp_features.hotkey_mask) {
984 res = add_many_to_attr_set(hotkey_dev_attributes,
985 hotkey_mask_attributes,
986 ARRAY_SIZE(hotkey_mask_attributes));
987 }
988
989 /* Not all thinkpads have a hardware radio switch */
990 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
991 tp_features.hotkey_wlsw = 1;
992 printk(IBM_INFO
993 "radio switch found; radios are %s\n",
994 enabled(status, 0));
995 res = add_to_attr_set(hotkey_dev_attributes,
996 &dev_attr_hotkey_radio_sw.attr);
997 }
998
999 if (!res)
1000 res = register_attr_set_with_sysfs(
1001 hotkey_dev_attributes,
1002 &tpacpi_pdev->dev.kobj);
1003 if (res)
1004 return res;
1005
1006 #ifndef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
1007 for (i = 0; i < 12; i++)
1008 hotkey_keycode_map[i] = KEY_UNKNOWN;
1009 #endif /* ! CONFIG_THINKPAD_ACPI_INPUT_ENABLED */
1010
1011 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1012 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1013 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1014 tpacpi_inputdev->keycodesize = sizeof(hotkey_keycode_map[0]);
1015 tpacpi_inputdev->keycodemax = ARRAY_SIZE(hotkey_keycode_map);
1016 tpacpi_inputdev->keycode = &hotkey_keycode_map;
1017 for (i = 0; i < ARRAY_SIZE(hotkey_keycode_map); i++) {
1018 if (hotkey_keycode_map[i] != KEY_RESERVED) {
1019 set_bit(hotkey_keycode_map[i],
1020 tpacpi_inputdev->keybit);
1021 } else {
1022 if (i < sizeof(hotkey_reserved_mask)*8)
1023 hotkey_reserved_mask |= 1 << i;
1024 }
1025 }
1026
1027 if (tp_features.hotkey_wlsw) {
1028 set_bit(EV_SW, tpacpi_inputdev->evbit);
1029 set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1030 }
1031
1032 #ifdef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
1033 dbg_printk(TPACPI_DBG_INIT,
1034 "enabling hot key handling\n");
1035 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1036 | hotkey_orig_mask);
1037 if (res)
1038 return res;
1039 #endif /* CONFIG_THINKPAD_ACPI_INPUT_ENABLED */
1040 }
1041
1042 return (tp_features.hotkey)? 0 : 1;
1043 }
1044
1045 static void hotkey_exit(void)
1046 {
1047 int res;
1048
1049 if (tp_features.hotkey) {
1050 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1051 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1052 if (res)
1053 printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1054 }
1055
1056 if (hotkey_dev_attributes) {
1057 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1058 hotkey_dev_attributes = NULL;
1059 }
1060 }
1061
1062 static void tpacpi_input_send_key(unsigned int scancode,
1063 unsigned int keycode)
1064 {
1065 if (keycode != KEY_RESERVED) {
1066 input_report_key(tpacpi_inputdev, keycode, 1);
1067 if (keycode == KEY_UNKNOWN)
1068 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1069 scancode);
1070 input_sync(tpacpi_inputdev);
1071
1072 input_report_key(tpacpi_inputdev, keycode, 0);
1073 if (keycode == KEY_UNKNOWN)
1074 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1075 scancode);
1076 input_sync(tpacpi_inputdev);
1077 }
1078 }
1079
1080 static void tpacpi_input_send_radiosw(void)
1081 {
1082 int wlsw;
1083
1084 if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw))
1085 input_report_switch(tpacpi_inputdev,
1086 SW_RADIO, !!wlsw);
1087 }
1088
1089 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1090 {
1091 u32 hkey;
1092 unsigned int keycode, scancode;
1093 int sendacpi = 1;
1094
1095 if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1096 if (tpacpi_inputdev->users > 0) {
1097 switch (hkey >> 12) {
1098 case 1:
1099 /* 0x1000-0x1FFF: key presses */
1100 scancode = hkey & 0xfff;
1101 if (scancode > 0 && scancode < 0x21) {
1102 scancode--;
1103 keycode = hotkey_keycode_map[scancode];
1104 tpacpi_input_send_key(scancode, keycode);
1105 sendacpi = (keycode == KEY_RESERVED
1106 || keycode == KEY_UNKNOWN);
1107 } else {
1108 printk(IBM_ERR
1109 "hotkey 0x%04x out of range for keyboard map\n",
1110 hkey);
1111 }
1112 break;
1113 case 5:
1114 /* 0x5000-0x5FFF: LID */
1115 /* we don't handle it through this path, just
1116 * eat up known LID events */
1117 if (hkey != 0x5001 && hkey != 0x5002) {
1118 printk(IBM_ERR
1119 "unknown LID-related hotkey event: 0x%04x\n",
1120 hkey);
1121 }
1122 break;
1123 case 7:
1124 /* 0x7000-0x7FFF: misc */
1125 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1126 tpacpi_input_send_radiosw();
1127 sendacpi = 0;
1128 break;
1129 }
1130 /* fallthrough to default */
1131 default:
1132 /* case 2: dock-related */
1133 /* 0x2305 - T43 waking up due to bay lever eject while aslept */
1134 /* case 3: ultra-bay related. maybe bay in dock? */
1135 /* 0x3003 - T43 after wake up by bay lever eject (0x2305) */
1136 printk(IBM_NOTICE "unhandled hotkey event 0x%04x\n", hkey);
1137 }
1138 }
1139
1140 if (sendacpi)
1141 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
1142 } else {
1143 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
1144 acpi_bus_generate_event(ibm->acpi->device, event, 0);
1145 }
1146 }
1147
1148 static void hotkey_resume(void)
1149 {
1150 tpacpi_input_send_radiosw();
1151 }
1152
1153 /*
1154 * Call with hotkey_mutex held
1155 */
1156 static int hotkey_get(int *status, u32 *mask)
1157 {
1158 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1159 return -EIO;
1160
1161 if (tp_features.hotkey_mask)
1162 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1163 return -EIO;
1164
1165 return 0;
1166 }
1167
1168 /*
1169 * Call with hotkey_mutex held
1170 */
1171 static int hotkey_set(int status, u32 mask)
1172 {
1173 int i;
1174
1175 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1176 return -EIO;
1177
1178 if (tp_features.hotkey_mask)
1179 for (i = 0; i < 32; i++) {
1180 int bit = ((1 << i) & mask) != 0;
1181 if (!acpi_evalf(hkey_handle,
1182 NULL, "MHKM", "vdd", i + 1, bit))
1183 return -EIO;
1184 }
1185
1186 return 0;
1187 }
1188
1189 /* procfs -------------------------------------------------------------- */
1190 static int hotkey_read(char *p)
1191 {
1192 int res, status;
1193 u32 mask;
1194 int len = 0;
1195
1196 if (!tp_features.hotkey) {
1197 len += sprintf(p + len, "status:\t\tnot supported\n");
1198 return len;
1199 }
1200
1201 res = mutex_lock_interruptible(&hotkey_mutex);
1202 if (res < 0)
1203 return res;
1204 res = hotkey_get(&status, &mask);
1205 mutex_unlock(&hotkey_mutex);
1206 if (res)
1207 return res;
1208
1209 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1210 if (tp_features.hotkey_mask) {
1211 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1212 len += sprintf(p + len,
1213 "commands:\tenable, disable, reset, <mask>\n");
1214 } else {
1215 len += sprintf(p + len, "mask:\t\tnot supported\n");
1216 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1217 }
1218
1219 return len;
1220 }
1221
1222 static int hotkey_write(char *buf)
1223 {
1224 int res, status;
1225 u32 mask;
1226 char *cmd;
1227 int do_cmd = 0;
1228
1229 if (!tp_features.hotkey)
1230 return -ENODEV;
1231
1232 res = mutex_lock_interruptible(&hotkey_mutex);
1233 if (res < 0)
1234 return res;
1235
1236 res = hotkey_get(&status, &mask);
1237 if (res)
1238 goto errexit;
1239
1240 res = 0;
1241 while ((cmd = next_cmd(&buf))) {
1242 if (strlencmp(cmd, "enable") == 0) {
1243 status = 1;
1244 } else if (strlencmp(cmd, "disable") == 0) {
1245 status = 0;
1246 } else if (strlencmp(cmd, "reset") == 0) {
1247 status = hotkey_orig_status;
1248 mask = hotkey_orig_mask;
1249 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1250 /* mask set */
1251 } else if (sscanf(cmd, "%x", &mask) == 1) {
1252 /* mask set */
1253 } else {
1254 res = -EINVAL;
1255 goto errexit;
1256 }
1257 do_cmd = 1;
1258 }
1259
1260 if (do_cmd)
1261 res = hotkey_set(status, mask);
1262
1263 errexit:
1264 mutex_unlock(&hotkey_mutex);
1265 return res;
1266 }
1267
1268 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1269 .hid = IBM_HKEY_HID,
1270 .notify = hotkey_notify,
1271 .handle = &hkey_handle,
1272 .type = ACPI_DEVICE_NOTIFY,
1273 };
1274
1275 static struct ibm_struct hotkey_driver_data = {
1276 .name = "hotkey",
1277 .read = hotkey_read,
1278 .write = hotkey_write,
1279 .exit = hotkey_exit,
1280 .resume = hotkey_resume,
1281 .acpi = &ibm_hotkey_acpidriver,
1282 };
1283
1284 /*************************************************************************
1285 * Bluetooth subdriver
1286 */
1287
1288 /* sysfs bluetooth enable ---------------------------------------------- */
1289 static ssize_t bluetooth_enable_show(struct device *dev,
1290 struct device_attribute *attr,
1291 char *buf)
1292 {
1293 int status;
1294
1295 status = bluetooth_get_radiosw();
1296 if (status < 0)
1297 return status;
1298
1299 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1300 }
1301
1302 static ssize_t bluetooth_enable_store(struct device *dev,
1303 struct device_attribute *attr,
1304 const char *buf, size_t count)
1305 {
1306 unsigned long t;
1307 int res;
1308
1309 if (parse_strtoul(buf, 1, &t))
1310 return -EINVAL;
1311
1312 res = bluetooth_set_radiosw(t);
1313
1314 return (res) ? res : count;
1315 }
1316
1317 static struct device_attribute dev_attr_bluetooth_enable =
1318 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1319 bluetooth_enable_show, bluetooth_enable_store);
1320
1321 /* --------------------------------------------------------------------- */
1322
1323 static struct attribute *bluetooth_attributes[] = {
1324 &dev_attr_bluetooth_enable.attr,
1325 NULL
1326 };
1327
1328 static const struct attribute_group bluetooth_attr_group = {
1329 .attrs = bluetooth_attributes,
1330 };
1331
1332 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1333 {
1334 int res;
1335 int status = 0;
1336
1337 vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1338
1339 IBM_ACPIHANDLE_INIT(hkey);
1340
1341 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1342 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1343 tp_features.bluetooth = hkey_handle &&
1344 acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1345
1346 vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1347 str_supported(tp_features.bluetooth),
1348 status);
1349
1350 if (tp_features.bluetooth) {
1351 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1352 /* no bluetooth hardware present in system */
1353 tp_features.bluetooth = 0;
1354 dbg_printk(TPACPI_DBG_INIT,
1355 "bluetooth hardware not installed\n");
1356 } else {
1357 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1358 &bluetooth_attr_group);
1359 if (res)
1360 return res;
1361 }
1362 }
1363
1364 return (tp_features.bluetooth)? 0 : 1;
1365 }
1366
1367 static void bluetooth_exit(void)
1368 {
1369 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1370 &bluetooth_attr_group);
1371 }
1372
1373 static int bluetooth_get_radiosw(void)
1374 {
1375 int status;
1376
1377 if (!tp_features.bluetooth)
1378 return -ENODEV;
1379
1380 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1381 return -EIO;
1382
1383 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1384 }
1385
1386 static int bluetooth_set_radiosw(int radio_on)
1387 {
1388 int status;
1389
1390 if (!tp_features.bluetooth)
1391 return -ENODEV;
1392
1393 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1394 return -EIO;
1395 if (radio_on)
1396 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1397 else
1398 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1399 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1400 return -EIO;
1401
1402 return 0;
1403 }
1404
1405 /* procfs -------------------------------------------------------------- */
1406 static int bluetooth_read(char *p)
1407 {
1408 int len = 0;
1409 int status = bluetooth_get_radiosw();
1410
1411 if (!tp_features.bluetooth)
1412 len += sprintf(p + len, "status:\t\tnot supported\n");
1413 else {
1414 len += sprintf(p + len, "status:\t\t%s\n",
1415 (status)? "enabled" : "disabled");
1416 len += sprintf(p + len, "commands:\tenable, disable\n");
1417 }
1418
1419 return len;
1420 }
1421
1422 static int bluetooth_write(char *buf)
1423 {
1424 char *cmd;
1425
1426 if (!tp_features.bluetooth)
1427 return -ENODEV;
1428
1429 while ((cmd = next_cmd(&buf))) {
1430 if (strlencmp(cmd, "enable") == 0) {
1431 bluetooth_set_radiosw(1);
1432 } else if (strlencmp(cmd, "disable") == 0) {
1433 bluetooth_set_radiosw(0);
1434 } else
1435 return -EINVAL;
1436 }
1437
1438 return 0;
1439 }
1440
1441 static struct ibm_struct bluetooth_driver_data = {
1442 .name = "bluetooth",
1443 .read = bluetooth_read,
1444 .write = bluetooth_write,
1445 .exit = bluetooth_exit,
1446 };
1447
1448 /*************************************************************************
1449 * Wan subdriver
1450 */
1451
1452 /* sysfs wan enable ---------------------------------------------------- */
1453 static ssize_t wan_enable_show(struct device *dev,
1454 struct device_attribute *attr,
1455 char *buf)
1456 {
1457 int status;
1458
1459 status = wan_get_radiosw();
1460 if (status < 0)
1461 return status;
1462
1463 return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1464 }
1465
1466 static ssize_t wan_enable_store(struct device *dev,
1467 struct device_attribute *attr,
1468 const char *buf, size_t count)
1469 {
1470 unsigned long t;
1471 int res;
1472
1473 if (parse_strtoul(buf, 1, &t))
1474 return -EINVAL;
1475
1476 res = wan_set_radiosw(t);
1477
1478 return (res) ? res : count;
1479 }
1480
1481 static struct device_attribute dev_attr_wan_enable =
1482 __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1483 wan_enable_show, wan_enable_store);
1484
1485 /* --------------------------------------------------------------------- */
1486
1487 static struct attribute *wan_attributes[] = {
1488 &dev_attr_wan_enable.attr,
1489 NULL
1490 };
1491
1492 static const struct attribute_group wan_attr_group = {
1493 .attrs = wan_attributes,
1494 };
1495
1496 static int __init wan_init(struct ibm_init_struct *iibm)
1497 {
1498 int res;
1499 int status = 0;
1500
1501 vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1502
1503 IBM_ACPIHANDLE_INIT(hkey);
1504
1505 tp_features.wan = hkey_handle &&
1506 acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1507
1508 vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1509 str_supported(tp_features.wan),
1510 status);
1511
1512 if (tp_features.wan) {
1513 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1514 /* no wan hardware present in system */
1515 tp_features.wan = 0;
1516 dbg_printk(TPACPI_DBG_INIT,
1517 "wan hardware not installed\n");
1518 } else {
1519 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1520 &wan_attr_group);
1521 if (res)
1522 return res;
1523 }
1524 }
1525
1526 return (tp_features.wan)? 0 : 1;
1527 }
1528
1529 static void wan_exit(void)
1530 {
1531 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1532 &wan_attr_group);
1533 }
1534
1535 static int wan_get_radiosw(void)
1536 {
1537 int status;
1538
1539 if (!tp_features.wan)
1540 return -ENODEV;
1541
1542 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1543 return -EIO;
1544
1545 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1546 }
1547
1548 static int wan_set_radiosw(int radio_on)
1549 {
1550 int status;
1551
1552 if (!tp_features.wan)
1553 return -ENODEV;
1554
1555 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1556 return -EIO;
1557 if (radio_on)
1558 status |= TP_ACPI_WANCARD_RADIOSSW;
1559 else
1560 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1561 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1562 return -EIO;
1563
1564 return 0;
1565 }
1566
1567 /* procfs -------------------------------------------------------------- */
1568 static int wan_read(char *p)
1569 {
1570 int len = 0;
1571 int status = wan_get_radiosw();
1572
1573 if (!tp_features.wan)
1574 len += sprintf(p + len, "status:\t\tnot supported\n");
1575 else {
1576 len += sprintf(p + len, "status:\t\t%s\n",
1577 (status)? "enabled" : "disabled");
1578 len += sprintf(p + len, "commands:\tenable, disable\n");
1579 }
1580
1581 return len;
1582 }
1583
1584 static int wan_write(char *buf)
1585 {
1586 char *cmd;
1587
1588 if (!tp_features.wan)
1589 return -ENODEV;
1590
1591 while ((cmd = next_cmd(&buf))) {
1592 if (strlencmp(cmd, "enable") == 0) {
1593 wan_set_radiosw(1);
1594 } else if (strlencmp(cmd, "disable") == 0) {
1595 wan_set_radiosw(0);
1596 } else
1597 return -EINVAL;
1598 }
1599
1600 return 0;
1601 }
1602
1603 static struct ibm_struct wan_driver_data = {
1604 .name = "wan",
1605 .read = wan_read,
1606 .write = wan_write,
1607 .exit = wan_exit,
1608 .flags.experimental = 1,
1609 };
1610
1611 /*************************************************************************
1612 * Video subdriver
1613 */
1614
1615 static enum video_access_mode video_supported;
1616 static int video_orig_autosw;
1617
1618 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
1619 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
1620 "\\_SB.PCI0.VID0", /* 770e */
1621 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
1622 "\\_SB.PCI0.AGP.VID", /* all others */
1623 ); /* R30, R31 */
1624
1625 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
1626
1627 static int __init video_init(struct ibm_init_struct *iibm)
1628 {
1629 int ivga;
1630
1631 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1632
1633 IBM_ACPIHANDLE_INIT(vid);
1634 IBM_ACPIHANDLE_INIT(vid2);
1635
1636 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1637 /* G41, assume IVGA doesn't change */
1638 vid_handle = vid2_handle;
1639
1640 if (!vid_handle)
1641 /* video switching not supported on R30, R31 */
1642 video_supported = TPACPI_VIDEO_NONE;
1643 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1644 /* 570 */
1645 video_supported = TPACPI_VIDEO_570;
1646 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1647 /* 600e/x, 770e, 770x */
1648 video_supported = TPACPI_VIDEO_770;
1649 else
1650 /* all others */
1651 video_supported = TPACPI_VIDEO_NEW;
1652
1653 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1654 str_supported(video_supported != TPACPI_VIDEO_NONE),
1655 video_supported);
1656
1657 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1658 }
1659
1660 static void video_exit(void)
1661 {
1662 dbg_printk(TPACPI_DBG_EXIT,
1663 "restoring original video autoswitch mode\n");
1664 if (video_autosw_set(video_orig_autosw))
1665 printk(IBM_ERR "error while trying to restore original "
1666 "video autoswitch mode\n");
1667 }
1668
1669 static int video_outputsw_get(void)
1670 {
1671 int status = 0;
1672 int i;
1673
1674 switch (video_supported) {
1675 case TPACPI_VIDEO_570:
1676 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1677 TP_ACPI_VIDEO_570_PHSCMD))
1678 return -EIO;
1679 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1680 break;
1681 case TPACPI_VIDEO_770:
1682 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1683 return -EIO;
1684 if (i)
1685 status |= TP_ACPI_VIDEO_S_LCD;
1686 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1687 return -EIO;
1688 if (i)
1689 status |= TP_ACPI_VIDEO_S_CRT;
1690 break;
1691 case TPACPI_VIDEO_NEW:
1692 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1693 !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1694 return -EIO;
1695 if (i)
1696 status |= TP_ACPI_VIDEO_S_CRT;
1697
1698 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1699 !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1700 return -EIO;
1701 if (i)
1702 status |= TP_ACPI_VIDEO_S_LCD;
1703 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1704 return -EIO;
1705 if (i)
1706 status |= TP_ACPI_VIDEO_S_DVI;
1707 break;
1708 default:
1709 return -ENOSYS;
1710 }
1711
1712 return status;
1713 }
1714
1715 static int video_outputsw_set(int status)
1716 {
1717 int autosw;
1718 int res = 0;
1719
1720 switch (video_supported) {
1721 case TPACPI_VIDEO_570:
1722 res = acpi_evalf(NULL, NULL,
1723 "\\_SB.PHS2", "vdd",
1724 TP_ACPI_VIDEO_570_PHS2CMD,
1725 status | TP_ACPI_VIDEO_570_PHS2SET);
1726 break;
1727 case TPACPI_VIDEO_770:
1728 autosw = video_autosw_get();
1729 if (autosw < 0)
1730 return autosw;
1731
1732 res = video_autosw_set(1);
1733 if (res)
1734 return res;
1735 res = acpi_evalf(vid_handle, NULL,
1736 "ASWT", "vdd", status * 0x100, 0);
1737 if (!autosw && video_autosw_set(autosw)) {
1738 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1739 return -EIO;
1740 }
1741 break;
1742 case TPACPI_VIDEO_NEW:
1743 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1744 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1745 break;
1746 default:
1747 return -ENOSYS;
1748 }
1749
1750 return (res)? 0 : -EIO;
1751 }
1752
1753 static int video_autosw_get(void)
1754 {
1755 int autosw = 0;
1756
1757 switch (video_supported) {
1758 case TPACPI_VIDEO_570:
1759 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1760 return -EIO;
1761 break;
1762 case TPACPI_VIDEO_770:
1763 case TPACPI_VIDEO_NEW:
1764 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1765 return -EIO;
1766 break;
1767 default:
1768 return -ENOSYS;
1769 }
1770
1771 return autosw & 1;
1772 }
1773
1774 static int video_autosw_set(int enable)
1775 {
1776 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1777 return -EIO;
1778 return 0;
1779 }
1780
1781 static int video_outputsw_cycle(void)
1782 {
1783 int autosw = video_autosw_get();
1784 int res;
1785
1786 if (autosw < 0)
1787 return autosw;
1788
1789 switch (video_supported) {
1790 case TPACPI_VIDEO_570:
1791 res = video_autosw_set(1);
1792 if (res)
1793 return res;
1794 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1795 break;
1796 case TPACPI_VIDEO_770:
1797 case TPACPI_VIDEO_NEW:
1798 res = video_autosw_set(1);
1799 if (res)
1800 return res;
1801 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1802 break;
1803 default:
1804 return -ENOSYS;
1805 }
1806 if (!autosw && video_autosw_set(autosw)) {
1807 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1808 return -EIO;
1809 }
1810
1811 return (res)? 0 : -EIO;
1812 }
1813
1814 static int video_expand_toggle(void)
1815 {
1816 switch (video_supported) {
1817 case TPACPI_VIDEO_570:
1818 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1819 0 : -EIO;
1820 case TPACPI_VIDEO_770:
1821 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1822 0 : -EIO;
1823 case TPACPI_VIDEO_NEW:
1824 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1825 0 : -EIO;
1826 default:
1827 return -ENOSYS;
1828 }
1829 /* not reached */
1830 }
1831
1832 static int video_read(char *p)
1833 {
1834 int status, autosw;
1835 int len = 0;
1836
1837 if (video_supported == TPACPI_VIDEO_NONE) {
1838 len += sprintf(p + len, "status:\t\tnot supported\n");
1839 return len;
1840 }
1841
1842 status = video_outputsw_get();
1843 if (status < 0)
1844 return status;
1845
1846 autosw = video_autosw_get();
1847 if (autosw < 0)
1848 return autosw;
1849
1850 len += sprintf(p + len, "status:\t\tsupported\n");
1851 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1852 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1853 if (video_supported == TPACPI_VIDEO_NEW)
1854 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1855 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1856 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1857 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1858 if (video_supported == TPACPI_VIDEO_NEW)
1859 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1860 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1861 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1862
1863 return len;
1864 }
1865
1866 static int video_write(char *buf)
1867 {
1868 char *cmd;
1869 int enable, disable, status;
1870 int res;
1871
1872 if (video_supported == TPACPI_VIDEO_NONE)
1873 return -ENODEV;
1874
1875 enable = 0;
1876 disable = 0;
1877
1878 while ((cmd = next_cmd(&buf))) {
1879 if (strlencmp(cmd, "lcd_enable") == 0) {
1880 enable |= TP_ACPI_VIDEO_S_LCD;
1881 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1882 disable |= TP_ACPI_VIDEO_S_LCD;
1883 } else if (strlencmp(cmd, "crt_enable") == 0) {
1884 enable |= TP_ACPI_VIDEO_S_CRT;
1885 } else if (strlencmp(cmd, "crt_disable") == 0) {
1886 disable |= TP_ACPI_VIDEO_S_CRT;
1887 } else if (video_supported == TPACPI_VIDEO_NEW &&
1888 strlencmp(cmd, "dvi_enable") == 0) {
1889 enable |= TP_ACPI_VIDEO_S_DVI;
1890 } else if (video_supported == TPACPI_VIDEO_NEW &&
1891 strlencmp(cmd, "dvi_disable") == 0) {
1892 disable |= TP_ACPI_VIDEO_S_DVI;
1893 } else if (strlencmp(cmd, "auto_enable") == 0) {
1894 res = video_autosw_set(1);
1895 if (res)
1896 return res;
1897 } else if (strlencmp(cmd, "auto_disable") == 0) {
1898 res = video_autosw_set(0);
1899 if (res)
1900 return res;
1901 } else if (strlencmp(cmd, "video_switch") == 0) {
1902 res = video_outputsw_cycle();
1903 if (res)
1904 return res;
1905 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1906 res = video_expand_toggle();
1907 if (res)
1908 return res;
1909 } else
1910 return -EINVAL;
1911 }
1912
1913 if (enable || disable) {
1914 status = video_outputsw_get();
1915 if (status < 0)
1916 return status;
1917 res = video_outputsw_set((status & ~disable) | enable);
1918 if (res)
1919 return res;
1920 }
1921
1922 return 0;
1923 }
1924
1925 static struct ibm_struct video_driver_data = {
1926 .name = "video",
1927 .read = video_read,
1928 .write = video_write,
1929 .exit = video_exit,
1930 };
1931
1932 /*************************************************************************
1933 * Light (thinklight) subdriver
1934 */
1935
1936 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
1937 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
1938
1939 static int __init light_init(struct ibm_init_struct *iibm)
1940 {
1941 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1942
1943 IBM_ACPIHANDLE_INIT(ledb);
1944 IBM_ACPIHANDLE_INIT(lght);
1945 IBM_ACPIHANDLE_INIT(cmos);
1946
1947 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1948 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1949
1950 if (tp_features.light)
1951 /* light status not supported on
1952 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1953 tp_features.light_status =
1954 acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1955
1956 vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1957 str_supported(tp_features.light));
1958
1959 return (tp_features.light)? 0 : 1;
1960 }
1961
1962 static int light_read(char *p)
1963 {
1964 int len = 0;
1965 int status = 0;
1966
1967 if (!tp_features.light) {
1968 len += sprintf(p + len, "status:\t\tnot supported\n");
1969 } else if (!tp_features.light_status) {
1970 len += sprintf(p + len, "status:\t\tunknown\n");
1971 len += sprintf(p + len, "commands:\ton, off\n");
1972 } else {
1973 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1974 return -EIO;
1975 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1976 len += sprintf(p + len, "commands:\ton, off\n");
1977 }
1978
1979 return len;
1980 }
1981
1982 static int light_write(char *buf)
1983 {
1984 int cmos_cmd, lght_cmd;
1985 char *cmd;
1986 int success;
1987
1988 if (!tp_features.light)
1989 return -ENODEV;
1990
1991 while ((cmd = next_cmd(&buf))) {
1992 if (strlencmp(cmd, "on") == 0) {
1993 cmos_cmd = 0x0c;
1994 lght_cmd = 1;
1995 } else if (strlencmp(cmd, "off") == 0) {
1996 cmos_cmd = 0x0d;
1997 lght_cmd = 0;
1998 } else
1999 return -EINVAL;
2000
2001 success = cmos_handle ?
2002 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2003 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2004 if (!success)
2005 return -EIO;
2006 }
2007
2008 return 0;
2009 }
2010
2011 static struct ibm_struct light_driver_data = {
2012 .name = "light",
2013 .read = light_read,
2014 .write = light_write,
2015 };
2016
2017 /*************************************************************************
2018 * Dock subdriver
2019 */
2020
2021 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2022
2023 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
2024 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2025 "\\_SB.PCI0.PCI1.DOCK", /* all others */
2026 "\\_SB.PCI.ISA.SLCE", /* 570 */
2027 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2028
2029 /* don't list other alternatives as we install a notify handler on the 570 */
2030 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
2031
2032 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2033 {
2034 .notify = dock_notify,
2035 .handle = &dock_handle,
2036 .type = ACPI_SYSTEM_NOTIFY,
2037 },
2038 {
2039 /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2040 * We just use it to get notifications of dock hotplug
2041 * in very old thinkpads */
2042 .hid = PCI_ROOT_HID_STRING,
2043 .notify = dock_notify,
2044 .handle = &pci_handle,
2045 .type = ACPI_SYSTEM_NOTIFY,
2046 },
2047 };
2048
2049 static struct ibm_struct dock_driver_data[2] = {
2050 {
2051 .name = "dock",
2052 .read = dock_read,
2053 .write = dock_write,
2054 .acpi = &ibm_dock_acpidriver[0],
2055 },
2056 {
2057 .name = "dock",
2058 .acpi = &ibm_dock_acpidriver[1],
2059 },
2060 };
2061
2062 #define dock_docked() (_sta(dock_handle) & 1)
2063
2064 static int __init dock_init(struct ibm_init_struct *iibm)
2065 {
2066 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2067
2068 IBM_ACPIHANDLE_INIT(dock);
2069
2070 vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2071 str_supported(dock_handle != NULL));
2072
2073 return (dock_handle)? 0 : 1;
2074 }
2075
2076 static int __init dock_init2(struct ibm_init_struct *iibm)
2077 {
2078 int dock2_needed;
2079
2080 vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2081
2082 if (dock_driver_data[0].flags.acpi_driver_registered &&
2083 dock_driver_data[0].flags.acpi_notify_installed) {
2084 IBM_ACPIHANDLE_INIT(pci);
2085 dock2_needed = (pci_handle != NULL);
2086 vdbg_printk(TPACPI_DBG_INIT,
2087 "dock PCI handler for the TP 570 is %s\n",
2088 str_supported(dock2_needed));
2089 } else {
2090 vdbg_printk(TPACPI_DBG_INIT,
2091 "dock subdriver part 2 not required\n");
2092 dock2_needed = 0;
2093 }
2094
2095 return (dock2_needed)? 0 : 1;
2096 }
2097
2098 static void dock_notify(struct ibm_struct *ibm, u32 event)
2099 {
2100 int docked = dock_docked();
2101 int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, PCI_ROOT_HID_STRING);
2102
2103 if (event == 1 && !pci) /* 570 */
2104 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
2105 else if (event == 1 && pci) /* 570 */
2106 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
2107 else if (event == 3 && docked)
2108 acpi_bus_generate_event(ibm->acpi->device, event, 1); /* button */
2109 else if (event == 3 && !docked)
2110 acpi_bus_generate_event(ibm->acpi->device, event, 2); /* undock */
2111 else if (event == 0 && docked)
2112 acpi_bus_generate_event(ibm->acpi->device, event, 3); /* dock */
2113 else {
2114 printk(IBM_ERR "unknown dock event %d, status %d\n",
2115 event, _sta(dock_handle));
2116 acpi_bus_generate_event(ibm->acpi->device, event, 0); /* unknown */
2117 }
2118 }
2119
2120 static int dock_read(char *p)
2121 {
2122 int len = 0;
2123 int docked = dock_docked();
2124
2125 if (!dock_handle)
2126 len += sprintf(p + len, "status:\t\tnot supported\n");
2127 else if (!docked)
2128 len += sprintf(p + len, "status:\t\tundocked\n");
2129 else {
2130 len += sprintf(p + len, "status:\t\tdocked\n");
2131 len += sprintf(p + len, "commands:\tdock, undock\n");
2132 }
2133
2134 return len;
2135 }
2136
2137 static int dock_write(char *buf)
2138 {
2139 char *cmd;
2140
2141 if (!dock_docked())
2142 return -ENODEV;
2143
2144 while ((cmd = next_cmd(&buf))) {
2145 if (strlencmp(cmd, "undock") == 0) {
2146 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2147 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2148 return -EIO;
2149 } else if (strlencmp(cmd, "dock") == 0) {
2150 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2151 return -EIO;
2152 } else
2153 return -EINVAL;
2154 }
2155
2156 return 0;
2157 }
2158
2159 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2160
2161 /*************************************************************************
2162 * Bay subdriver
2163 */
2164
2165 #ifdef CONFIG_THINKPAD_ACPI_BAY
2166 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
2167 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2168 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2169 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2170 ); /* A21e, R30, R31 */
2171 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2172 "_EJ0", /* all others */
2173 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2174 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
2175 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2176 ); /* all others */
2177 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
2178 "_EJ0", /* 770x */
2179 ); /* all others */
2180
2181 static int __init bay_init(struct ibm_init_struct *iibm)
2182 {
2183 vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2184
2185 IBM_ACPIHANDLE_INIT(bay);
2186 if (bay_handle)
2187 IBM_ACPIHANDLE_INIT(bay_ej);
2188 IBM_ACPIHANDLE_INIT(bay2);
2189 if (bay2_handle)
2190 IBM_ACPIHANDLE_INIT(bay2_ej);
2191
2192 tp_features.bay_status = bay_handle &&
2193 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2194 tp_features.bay_status2 = bay2_handle &&
2195 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2196
2197 tp_features.bay_eject = bay_handle && bay_ej_handle &&
2198 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2199 tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2200 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2201
2202 vdbg_printk(TPACPI_DBG_INIT,
2203 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2204 str_supported(tp_features.bay_status),
2205 str_supported(tp_features.bay_eject),
2206 str_supported(tp_features.bay_status2),
2207 str_supported(tp_features.bay_eject2));
2208
2209 return (tp_features.bay_status || tp_features.bay_eject ||
2210 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2211 }
2212
2213 static void bay_notify(struct ibm_struct *ibm, u32 event)
2214 {
2215 acpi_bus_generate_event(ibm->acpi->device, event, 0);
2216 }
2217
2218 #define bay_occupied(b) (_sta(b##_handle) & 1)
2219
2220 static int bay_read(char *p)
2221 {
2222 int len = 0;
2223 int occupied = bay_occupied(bay);
2224 int occupied2 = bay_occupied(bay2);
2225 int eject, eject2;
2226
2227 len += sprintf(p + len, "status:\t\t%s\n",
2228 tp_features.bay_status ?
2229 (occupied ? "occupied" : "unoccupied") :
2230 "not supported");
2231 if (tp_features.bay_status2)
2232 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2233 "occupied" : "unoccupied");
2234
2235 eject = tp_features.bay_eject && occupied;
2236 eject2 = tp_features.bay_eject2 && occupied2;
2237
2238 if (eject && eject2)
2239 len += sprintf(p + len, "commands:\teject, eject2\n");
2240 else if (eject)
2241 len += sprintf(p + len, "commands:\teject\n");
2242 else if (eject2)
2243 len += sprintf(p + len, "commands:\teject2\n");
2244
2245 return len;
2246 }
2247
2248 static int bay_write(char *buf)
2249 {
2250 char *cmd;
2251
2252 if (!tp_features.bay_eject && !tp_features.bay_eject2)
2253 return -ENODEV;
2254
2255 while ((cmd = next_cmd(&buf))) {
2256 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2257 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2258 return -EIO;
2259 } else if (tp_features.bay_eject2 &&
2260 strlencmp(cmd, "eject2") == 0) {
2261 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2262 return -EIO;
2263 } else
2264 return -EINVAL;
2265 }
2266
2267 return 0;
2268 }
2269
2270 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2271 .notify = bay_notify,
2272 .handle = &bay_handle,
2273 .type = ACPI_SYSTEM_NOTIFY,
2274 };
2275
2276 static struct ibm_struct bay_driver_data = {
2277 .name = "bay",
2278 .read = bay_read,
2279 .write = bay_write,
2280 .acpi = &ibm_bay_acpidriver,
2281 };
2282
2283 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2284
2285 /*************************************************************************
2286 * CMOS subdriver
2287 */
2288
2289 /* sysfs cmos_command -------------------------------------------------- */
2290 static ssize_t cmos_command_store(struct device *dev,
2291 struct device_attribute *attr,
2292 const char *buf, size_t count)
2293 {
2294 unsigned long cmos_cmd;
2295 int res;
2296
2297 if (parse_strtoul(buf, 21, &cmos_cmd))
2298 return -EINVAL;
2299
2300 res = issue_thinkpad_cmos_command(cmos_cmd);
2301 return (res)? res : count;
2302 }
2303
2304 static struct device_attribute dev_attr_cmos_command =
2305 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2306
2307 /* --------------------------------------------------------------------- */
2308
2309 static int __init cmos_init(struct ibm_init_struct *iibm)
2310 {
2311 int res;
2312
2313 vdbg_printk(TPACPI_DBG_INIT,
2314 "initializing cmos commands subdriver\n");
2315
2316 IBM_ACPIHANDLE_INIT(cmos);
2317
2318 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2319 str_supported(cmos_handle != NULL));
2320
2321 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2322 if (res)
2323 return res;
2324
2325 return (cmos_handle)? 0 : 1;
2326 }
2327
2328 static void cmos_exit(void)
2329 {
2330 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2331 }
2332
2333 static int cmos_read(char *p)
2334 {
2335 int len = 0;
2336
2337 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2338 R30, R31, T20-22, X20-21 */
2339 if (!cmos_handle)
2340 len += sprintf(p + len, "status:\t\tnot supported\n");
2341 else {
2342 len += sprintf(p + len, "status:\t\tsupported\n");
2343 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2344 }
2345
2346 return len;
2347 }
2348
2349 static int cmos_write(char *buf)
2350 {
2351 char *cmd;
2352 int cmos_cmd, res;
2353
2354 while ((cmd = next_cmd(&buf))) {
2355 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2356 cmos_cmd >= 0 && cmos_cmd <= 21) {
2357 /* cmos_cmd set */
2358 } else
2359 return -EINVAL;
2360
2361 res = issue_thinkpad_cmos_command(cmos_cmd);
2362 if (res)
2363 return res;
2364 }
2365
2366 return 0;
2367 }
2368
2369 static struct ibm_struct cmos_driver_data = {
2370 .name = "cmos",
2371 .read = cmos_read,
2372 .write = cmos_write,
2373 .exit = cmos_exit,
2374 };
2375
2376 /*************************************************************************
2377 * LED subdriver
2378 */
2379
2380 static enum led_access_mode led_supported;
2381
2382 IBM_HANDLE(led, ec, "SLED", /* 570 */
2383 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2384 "LED", /* all others */
2385 ); /* R30, R31 */
2386
2387 static int __init led_init(struct ibm_init_struct *iibm)
2388 {
2389 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2390
2391 IBM_ACPIHANDLE_INIT(led);
2392
2393 if (!led_handle)
2394 /* led not supported on R30, R31 */
2395 led_supported = TPACPI_LED_NONE;
2396 else if (strlencmp(led_path, "SLED") == 0)
2397 /* 570 */
2398 led_supported = TPACPI_LED_570;
2399 else if (strlencmp(led_path, "SYSL") == 0)
2400 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2401 led_supported = TPACPI_LED_OLD;
2402 else
2403 /* all others */
2404 led_supported = TPACPI_LED_NEW;
2405
2406 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2407 str_supported(led_supported), led_supported);
2408
2409 return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2410 }
2411
2412 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2413
2414 static int led_read(char *p)
2415 {
2416 int len = 0;
2417
2418 if (!led_supported) {
2419 len += sprintf(p + len, "status:\t\tnot supported\n");
2420 return len;
2421 }
2422 len += sprintf(p + len, "status:\t\tsupported\n");
2423
2424 if (led_supported == TPACPI_LED_570) {
2425 /* 570 */
2426 int i, status;
2427 for (i = 0; i < 8; i++) {
2428 if (!acpi_evalf(ec_handle,
2429 &status, "GLED", "dd", 1 << i))
2430 return -EIO;
2431 len += sprintf(p + len, "%d:\t\t%s\n",
2432 i, led_status(status));
2433 }
2434 }
2435
2436 len += sprintf(p + len, "commands:\t"
2437 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2438
2439 return len;
2440 }
2441
2442 /* off, on, blink */
2443 static const int led_sled_arg1[] = { 0, 1, 3 };
2444 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
2445 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
2446 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2447
2448 static int led_write(char *buf)
2449 {
2450 char *cmd;
2451 int led, ind, ret;
2452
2453 if (!led_supported)
2454 return -ENODEV;
2455
2456 while ((cmd = next_cmd(&buf))) {
2457 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2458 return -EINVAL;
2459
2460 if (strstr(cmd, "off")) {
2461 ind = 0;
2462 } else if (strstr(cmd, "on")) {
2463 ind = 1;
2464 } else if (strstr(cmd, "blink")) {
2465 ind = 2;
2466 } else
2467 return -EINVAL;
2468
2469 if (led_supported == TPACPI_LED_570) {
2470 /* 570 */
2471 led = 1 << led;
2472 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2473 led, led_sled_arg1[ind]))
2474 return -EIO;
2475 } else if (led_supported == TPACPI_LED_OLD) {
2476 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2477 led = 1 << led;
2478 ret = ec_write(TPACPI_LED_EC_HLMS, led);
2479 if (ret >= 0)
2480 ret =
2481 ec_write(TPACPI_LED_EC_HLBL,
2482 led * led_exp_hlbl[ind]);
2483 if (ret >= 0)
2484 ret =
2485 ec_write(TPACPI_LED_EC_HLCL,
2486 led * led_exp_hlcl[ind]);
2487 if (ret < 0)
2488 return ret;
2489 } else {
2490 /* all others */
2491 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2492 led, led_led_arg1[ind]))
2493 return -EIO;
2494 }
2495 }
2496
2497 return 0;
2498 }
2499
2500 static struct ibm_struct led_driver_data = {
2501 .name = "led",
2502 .read = led_read,
2503 .write = led_write,
2504 };
2505
2506 /*************************************************************************
2507 * Beep subdriver
2508 */
2509
2510 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
2511
2512 static int __init beep_init(struct ibm_init_struct *iibm)
2513 {
2514 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2515
2516 IBM_ACPIHANDLE_INIT(beep);
2517
2518 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2519 str_supported(beep_handle != NULL));
2520
2521 return (beep_handle)? 0 : 1;
2522 }
2523
2524 static int beep_read(char *p)
2525 {
2526 int len = 0;
2527
2528 if (!beep_handle)
2529 len += sprintf(p + len, "status:\t\tnot supported\n");
2530 else {
2531 len += sprintf(p + len, "status:\t\tsupported\n");
2532 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2533 }
2534
2535 return len;
2536 }
2537
2538 static int beep_write(char *buf)
2539 {
2540 char *cmd;
2541 int beep_cmd;
2542
2543 if (!beep_handle)
2544 return -ENODEV;
2545
2546 while ((cmd = next_cmd(&buf))) {
2547 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2548 beep_cmd >= 0 && beep_cmd <= 17) {
2549 /* beep_cmd set */
2550 } else
2551 return -EINVAL;
2552 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2553 return -EIO;
2554 }
2555
2556 return 0;
2557 }
2558
2559 static struct ibm_struct beep_driver_data = {
2560 .name = "beep",
2561 .read = beep_read,
2562 .write = beep_write,
2563 };
2564
2565 /*************************************************************************
2566 * Thermal subdriver
2567 */
2568
2569 static enum thermal_access_mode thermal_read_mode;
2570
2571 /* sysfs temp##_input -------------------------------------------------- */
2572
2573 static ssize_t thermal_temp_input_show(struct device *dev,
2574 struct device_attribute *attr,
2575 char *buf)
2576 {
2577 struct sensor_device_attribute *sensor_attr =
2578 to_sensor_dev_attr(attr);
2579 int idx = sensor_attr->index;
2580 s32 value;
2581 int res;
2582
2583 res = thermal_get_sensor(idx, &value);
2584 if (res)
2585 return res;
2586 if (value == TP_EC_THERMAL_TMP_NA * 1000)
2587 return -ENXIO;
2588
2589 return snprintf(buf, PAGE_SIZE, "%d\n", value);
2590 }
2591
2592 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2593 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2594
2595 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2596 THERMAL_SENSOR_ATTR_TEMP(1, 0),
2597 THERMAL_SENSOR_ATTR_TEMP(2, 1),
2598 THERMAL_SENSOR_ATTR_TEMP(3, 2),
2599 THERMAL_SENSOR_ATTR_TEMP(4, 3),
2600 THERMAL_SENSOR_ATTR_TEMP(5, 4),
2601 THERMAL_SENSOR_ATTR_TEMP(6, 5),
2602 THERMAL_SENSOR_ATTR_TEMP(7, 6),
2603 THERMAL_SENSOR_ATTR_TEMP(8, 7),
2604 THERMAL_SENSOR_ATTR_TEMP(9, 8),
2605 THERMAL_SENSOR_ATTR_TEMP(10, 9),
2606 THERMAL_SENSOR_ATTR_TEMP(11, 10),
2607 THERMAL_SENSOR_ATTR_TEMP(12, 11),
2608 THERMAL_SENSOR_ATTR_TEMP(13, 12),
2609 THERMAL_SENSOR_ATTR_TEMP(14, 13),
2610 THERMAL_SENSOR_ATTR_TEMP(15, 14),
2611 THERMAL_SENSOR_ATTR_TEMP(16, 15),
2612 };
2613
2614 #define THERMAL_ATTRS(X) \
2615 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2616
2617 static struct attribute *thermal_temp_input_attr[] = {
2618 THERMAL_ATTRS(8),
2619 THERMAL_ATTRS(9),
2620 THERMAL_ATTRS(10),
2621 THERMAL_ATTRS(11),
2622 THERMAL_ATTRS(12),
2623 THERMAL_ATTRS(13),
2624 THERMAL_ATTRS(14),
2625 THERMAL_ATTRS(15),
2626 THERMAL_ATTRS(0),
2627 THERMAL_ATTRS(1),
2628 THERMAL_ATTRS(2),
2629 THERMAL_ATTRS(3),
2630 THERMAL_ATTRS(4),
2631 THERMAL_ATTRS(5),
2632 THERMAL_ATTRS(6),
2633 THERMAL_ATTRS(7),
2634 NULL
2635 };
2636
2637 static const struct attribute_group thermal_temp_input16_group = {
2638 .attrs = thermal_temp_input_attr
2639 };
2640
2641 static const struct attribute_group thermal_temp_input8_group = {
2642 .attrs = &thermal_temp_input_attr[8]
2643 };
2644
2645 #undef THERMAL_SENSOR_ATTR_TEMP
2646 #undef THERMAL_ATTRS
2647
2648 /* --------------------------------------------------------------------- */
2649
2650 static int __init thermal_init(struct ibm_init_struct *iibm)
2651 {
2652 u8 t, ta1, ta2;
2653 int i;
2654 int acpi_tmp7;
2655 int res;
2656
2657 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2658
2659 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2660
2661 if (thinkpad_id.ec_model && experimental) {
2662 /*
2663 * Direct EC access mode: sensors at registers
2664 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
2665 * non-implemented, thermal sensors return 0x80 when
2666 * not available
2667 */
2668
2669 ta1 = ta2 = 0;
2670 for (i = 0; i < 8; i++) {
2671 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2672 ta1 |= t;
2673 } else {
2674 ta1 = 0;
2675 break;
2676 }
2677 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2678 ta2 |= t;
2679 } else {
2680 ta1 = 0;
2681 break;
2682 }
2683 }
2684 if (ta1 == 0) {
2685 /* This is sheer paranoia, but we handle it anyway */
2686 if (acpi_tmp7) {
2687 printk(IBM_ERR
2688 "ThinkPad ACPI EC access misbehaving, "
2689 "falling back to ACPI TMPx access mode\n");
2690 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2691 } else {
2692 printk(IBM_ERR
2693 "ThinkPad ACPI EC access misbehaving, "
2694 "disabling thermal sensors access\n");
2695 thermal_read_mode = TPACPI_THERMAL_NONE;
2696 }
2697 } else {
2698 thermal_read_mode =
2699 (ta2 != 0) ?
2700 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2701 }
2702 } else if (acpi_tmp7) {
2703 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2704 /* 600e/x, 770e, 770x */
2705 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2706 } else {
2707 /* Standard ACPI TMPx access, max 8 sensors */
2708 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2709 }
2710 } else {
2711 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2712 thermal_read_mode = TPACPI_THERMAL_NONE;
2713 }
2714
2715 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2716 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2717 thermal_read_mode);
2718
2719 switch(thermal_read_mode) {
2720 case TPACPI_THERMAL_TPEC_16:
2721 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2722 &thermal_temp_input16_group);
2723 if (res)
2724 return res;
2725 break;
2726 case TPACPI_THERMAL_TPEC_8:
2727 case TPACPI_THERMAL_ACPI_TMP07:
2728 case TPACPI_THERMAL_ACPI_UPDT:
2729 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2730 &thermal_temp_input8_group);
2731 if (res)
2732 return res;
2733 break;
2734 case TPACPI_THERMAL_NONE:
2735 default:
2736 return 1;
2737 }
2738
2739 return 0;
2740 }
2741
2742 static void thermal_exit(void)
2743 {
2744 switch(thermal_read_mode) {
2745 case TPACPI_THERMAL_TPEC_16:
2746 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2747 &thermal_temp_input16_group);
2748 break;
2749 case TPACPI_THERMAL_TPEC_8:
2750 case TPACPI_THERMAL_ACPI_TMP07:
2751 case TPACPI_THERMAL_ACPI_UPDT:
2752 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2753 &thermal_temp_input16_group);
2754 break;
2755 case TPACPI_THERMAL_NONE:
2756 default:
2757 break;
2758 }
2759 }
2760
2761 /* idx is zero-based */
2762 static int thermal_get_sensor(int idx, s32 *value)
2763 {
2764 int t;
2765 s8 tmp;
2766 char tmpi[5];
2767
2768 t = TP_EC_THERMAL_TMP0;
2769
2770 switch (thermal_read_mode) {
2771 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2772 case TPACPI_THERMAL_TPEC_16:
2773 if (idx >= 8 && idx <= 15) {
2774 t = TP_EC_THERMAL_TMP8;
2775 idx -= 8;
2776 }
2777 /* fallthrough */
2778 #endif
2779 case TPACPI_THERMAL_TPEC_8:
2780 if (idx <= 7) {
2781 if (!acpi_ec_read(t + idx, &tmp))
2782 return -EIO;
2783 *value = tmp * 1000;
2784 return 0;
2785 }
2786 break;
2787
2788 case TPACPI_THERMAL_ACPI_UPDT:
2789 if (idx <= 7) {
2790 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2791 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2792 return -EIO;
2793 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2794 return -EIO;
2795 *value = (t - 2732) * 100;
2796 return 0;
2797 }
2798 break;
2799
2800 case TPACPI_THERMAL_ACPI_TMP07:
2801 if (idx <= 7) {
2802 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2803 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2804 return -EIO;
2805 *value = t * 1000;
2806 return 0;
2807 }
2808 break;
2809
2810 case TPACPI_THERMAL_NONE:
2811 default:
2812 return -ENOSYS;
2813 }
2814
2815 return -EINVAL;
2816 }
2817
2818 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2819 {
2820 int res, i;
2821 int n;
2822
2823 n = 8;
2824 i = 0;
2825
2826 if (!s)
2827 return -EINVAL;
2828
2829 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2830 n = 16;
2831
2832 for(i = 0 ; i < n; i++) {
2833 res = thermal_get_sensor(i, &s->temp[i]);
2834 if (res)
2835 return res;
2836 }
2837
2838 return n;
2839 }
2840
2841 static int thermal_read(char *p)
2842 {
2843 int len = 0;
2844 int n, i;
2845 struct ibm_thermal_sensors_struct t;
2846
2847 n = thermal_get_sensors(&t);
2848 if (unlikely(n < 0))
2849 return n;
2850
2851 len += sprintf(p + len, "temperatures:\t");
2852
2853 if (n > 0) {
2854 for (i = 0; i < (n - 1); i++)
2855 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2856 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2857 } else
2858 len += sprintf(p + len, "not supported\n");
2859
2860 return len;
2861 }
2862
2863 static struct ibm_struct thermal_driver_data = {
2864 .name = "thermal",
2865 .read = thermal_read,
2866 .exit = thermal_exit,
2867 };
2868
2869 /*************************************************************************
2870 * EC Dump subdriver
2871 */
2872
2873 static u8 ecdump_regs[256];
2874
2875 static int ecdump_read(char *p)
2876 {
2877 int len = 0;
2878 int i, j;
2879 u8 v;
2880
2881 len += sprintf(p + len, "EC "
2882 " +00 +01 +02 +03 +04 +05 +06 +07"
2883 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2884 for (i = 0; i < 256; i += 16) {
2885 len += sprintf(p + len, "EC 0x%02x:", i);
2886 for (j = 0; j < 16; j++) {
2887 if (!acpi_ec_read(i + j, &v))
2888 break;
2889 if (v != ecdump_regs[i + j])
2890 len += sprintf(p + len, " *%02x", v);
2891 else
2892 len += sprintf(p + len, " %02x", v);
2893 ecdump_regs[i + j] = v;
2894 }
2895 len += sprintf(p + len, "\n");
2896 if (j != 16)
2897 break;
2898 }
2899
2900 /* These are way too dangerous to advertise openly... */
2901 #if 0
2902 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2903 " (<offset> is 00-ff, <value> is 00-ff)\n");
2904 len += sprintf(p + len, "commands:\t0x<offset> <value> "
2905 " (<offset> is 00-ff, <value> is 0-255)\n");
2906 #endif
2907 return len;
2908 }
2909
2910 static int ecdump_write(char *buf)
2911 {
2912 char *cmd;
2913 int i, v;
2914
2915 while ((cmd = next_cmd(&buf))) {
2916 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2917 /* i and v set */
2918 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2919 /* i and v set */
2920 } else
2921 return -EINVAL;
2922 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2923 if (!acpi_ec_write(i, v))
2924 return -EIO;
2925 } else
2926 return -EINVAL;
2927 }
2928
2929 return 0;
2930 }
2931
2932 static struct ibm_struct ecdump_driver_data = {
2933 .name = "ecdump",
2934 .read = ecdump_read,
2935 .write = ecdump_write,
2936 .flags.experimental = 1,
2937 };
2938
2939 /*************************************************************************
2940 * Backlight/brightness subdriver
2941 */
2942
2943 static struct backlight_device *ibm_backlight_device;
2944
2945 static struct backlight_ops ibm_backlight_data = {
2946 .get_brightness = brightness_get,
2947 .update_status = brightness_update_status,
2948 };
2949
2950 static int __init brightness_init(struct ibm_init_struct *iibm)
2951 {
2952 int b;
2953
2954 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2955
2956 if (!brightness_mode) {
2957 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
2958 brightness_mode = 2;
2959 else
2960 brightness_mode = 3;
2961
2962 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
2963 brightness_mode);
2964 }
2965
2966 if (brightness_mode > 3)
2967 return -EINVAL;
2968
2969 b = brightness_get(NULL);
2970 if (b < 0)
2971 return 1;
2972
2973 ibm_backlight_device = backlight_device_register(
2974 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2975 &ibm_backlight_data);
2976 if (IS_ERR(ibm_backlight_device)) {
2977 printk(IBM_ERR "Could not register backlight device\n");
2978 return PTR_ERR(ibm_backlight_device);
2979 }
2980 vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2981
2982 ibm_backlight_device->props.max_brightness = 7;
2983 ibm_backlight_device->props.brightness = b;
2984 backlight_update_status(ibm_backlight_device);
2985
2986 return 0;
2987 }
2988
2989 static void brightness_exit(void)
2990 {
2991 if (ibm_backlight_device) {
2992 vdbg_printk(TPACPI_DBG_EXIT,
2993 "calling backlight_device_unregister()\n");
2994 backlight_device_unregister(ibm_backlight_device);
2995 ibm_backlight_device = NULL;
2996 }
2997 }
2998
2999 static int brightness_update_status(struct backlight_device *bd)
3000 {
3001 return brightness_set(
3002 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3003 bd->props.power == FB_BLANK_UNBLANK) ?
3004 bd->props.brightness : 0);
3005 }
3006
3007 /*
3008 * ThinkPads can read brightness from two places: EC 0x31, or
3009 * CMOS NVRAM byte 0x5E, bits 0-3.
3010 */
3011 static int brightness_get(struct backlight_device *bd)
3012 {
3013 u8 lec = 0, lcmos = 0, level = 0;
3014
3015 if (brightness_mode & 1) {
3016 if (!acpi_ec_read(brightness_offset, &lec))
3017 return -EIO;
3018 lec &= 7;
3019 level = lec;
3020 };
3021 if (brightness_mode & 2) {
3022 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3023 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3024 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3025 level = lcmos;
3026 }
3027
3028 if (brightness_mode == 3 && lec != lcmos) {
3029 printk(IBM_ERR
3030 "CMOS NVRAM (%u) and EC (%u) do not agree "
3031 "on display brightness level\n",
3032 (unsigned int) lcmos,
3033 (unsigned int) lec);
3034 return -EIO;
3035 }
3036
3037 return level;
3038 }
3039
3040 static int brightness_set(int value)
3041 {
3042 int cmos_cmd, inc, i;
3043 int current_value = brightness_get(NULL);
3044
3045 if (value > 7)
3046 return -EINVAL;
3047
3048 cmos_cmd = value > current_value ?
3049 TP_CMOS_BRIGHTNESS_UP :
3050 TP_CMOS_BRIGHTNESS_DOWN;
3051 inc = value > current_value ? 1 : -1;
3052
3053 for (i = current_value; i != value; i += inc) {
3054 if ((brightness_mode & 2) &&
3055 issue_thinkpad_cmos_command(cmos_cmd))
3056 return -EIO;
3057 if ((brightness_mode & 1) &&
3058 !acpi_ec_write(brightness_offset, i + inc))
3059 return -EIO;
3060 }
3061
3062 return 0;
3063 }
3064
3065 static int brightness_read(char *p)
3066 {
3067 int len = 0;
3068 int level;
3069
3070 if ((level = brightness_get(NULL)) < 0) {
3071 len += sprintf(p + len, "level:\t\tunreadable\n");
3072 } else {
3073 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
3074 len += sprintf(p + len, "commands:\tup, down\n");
3075 len += sprintf(p + len, "commands:\tlevel <level>"
3076 " (<level> is 0-7)\n");
3077 }
3078
3079 return len;
3080 }
3081
3082 static int brightness_write(char *buf)
3083 {
3084 int level;
3085 int new_level;
3086 char *cmd;
3087
3088 while ((cmd = next_cmd(&buf))) {
3089 if ((level = brightness_get(NULL)) < 0)
3090 return level;
3091 level &= 7;
3092
3093 if (strlencmp(cmd, "up") == 0) {
3094 new_level = level == 7 ? 7 : level + 1;
3095 } else if (strlencmp(cmd, "down") == 0) {
3096 new_level = level == 0 ? 0 : level - 1;
3097 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3098 new_level >= 0 && new_level <= 7) {
3099 /* new_level set */
3100 } else
3101 return -EINVAL;
3102
3103 brightness_set(new_level);
3104 }
3105
3106 return 0;
3107 }
3108
3109 static struct ibm_struct brightness_driver_data = {
3110 .name = "brightness",
3111 .read = brightness_read,
3112 .write = brightness_write,
3113 .exit = brightness_exit,
3114 };
3115
3116 /*************************************************************************
3117 * Volume subdriver
3118 */
3119
3120 static int volume_read(char *p)
3121 {
3122 int len = 0;
3123 u8 level;
3124
3125 if (!acpi_ec_read(volume_offset, &level)) {
3126 len += sprintf(p + len, "level:\t\tunreadable\n");
3127 } else {
3128 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3129 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3130 len += sprintf(p + len, "commands:\tup, down, mute\n");
3131 len += sprintf(p + len, "commands:\tlevel <level>"
3132 " (<level> is 0-15)\n");
3133 }
3134
3135 return len;
3136 }
3137
3138 static int volume_write(char *buf)
3139 {
3140 int cmos_cmd, inc, i;
3141 u8 level, mute;
3142 int new_level, new_mute;
3143 char *cmd;
3144
3145 while ((cmd = next_cmd(&buf))) {
3146 if (!acpi_ec_read(volume_offset, &level))
3147 return -EIO;
3148 new_mute = mute = level & 0x40;
3149 new_level = level = level & 0xf;
3150
3151 if (strlencmp(cmd, "up") == 0) {
3152 if (mute)
3153 new_mute = 0;
3154 else
3155 new_level = level == 15 ? 15 : level + 1;
3156 } else if (strlencmp(cmd, "down") == 0) {
3157 if (mute)
3158 new_mute = 0;
3159 else
3160 new_level = level == 0 ? 0 : level - 1;
3161 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3162 new_level >= 0 && new_level <= 15) {
3163 /* new_level set */
3164 } else if (strlencmp(cmd, "mute") == 0) {
3165 new_mute = 0x40;
3166 } else
3167 return -EINVAL;
3168
3169 if (new_level != level) { /* mute doesn't change */
3170 cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3171 inc = new_level > level ? 1 : -1;
3172
3173 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3174 !acpi_ec_write(volume_offset, level)))
3175 return -EIO;
3176
3177 for (i = level; i != new_level; i += inc)
3178 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3179 !acpi_ec_write(volume_offset, i + inc))
3180 return -EIO;
3181
3182 if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3183 !acpi_ec_write(volume_offset,
3184 new_level + mute)))
3185 return -EIO;
3186 }
3187
3188 if (new_mute != mute) { /* level doesn't change */
3189 cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3190
3191 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3192 !acpi_ec_write(volume_offset, level + new_mute))
3193 return -EIO;
3194 }
3195 }
3196
3197 return 0;
3198 }
3199
3200 static struct ibm_struct volume_driver_data = {
3201 .name = "volume",
3202 .read = volume_read,
3203 .write = volume_write,
3204 };
3205
3206 /*************************************************************************
3207 * Fan subdriver
3208 */
3209
3210 /*
3211 * FAN ACCESS MODES
3212 *
3213 * TPACPI_FAN_RD_ACPI_GFAN:
3214 * ACPI GFAN method: returns fan level
3215 *
3216 * see TPACPI_FAN_WR_ACPI_SFAN
3217 * EC 0x2f (HFSP) not available if GFAN exists
3218 *
3219 * TPACPI_FAN_WR_ACPI_SFAN:
3220 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3221 *
3222 * EC 0x2f (HFSP) might be available *for reading*, but do not use
3223 * it for writing.
3224 *
3225 * TPACPI_FAN_WR_TPEC:
3226 * ThinkPad EC register 0x2f (HFSP): fan control loop mode
3227 * Supported on almost all ThinkPads
3228 *
3229 * Fan speed changes of any sort (including those caused by the
3230 * disengaged mode) are usually done slowly by the firmware as the
3231 * maximum ammount of fan duty cycle change per second seems to be
3232 * limited.
3233 *
3234 * Reading is not available if GFAN exists.
3235 * Writing is not available if SFAN exists.
3236 *
3237 * Bits
3238 * 7 automatic mode engaged;
3239 * (default operation mode of the ThinkPad)
3240 * fan level is ignored in this mode.
3241 * 6 full speed mode (takes precedence over bit 7);
3242 * not available on all thinkpads. May disable
3243 * the tachometer while the fan controller ramps up
3244 * the speed (which can take up to a few *minutes*).
3245 * Speeds up fan to 100% duty-cycle, which is far above
3246 * the standard RPM levels. It is not impossible that
3247 * it could cause hardware damage.
3248 * 5-3 unused in some models. Extra bits for fan level
3249 * in others, but still useless as all values above
3250 * 7 map to the same speed as level 7 in these models.
3251 * 2-0 fan level (0..7 usually)
3252 * 0x00 = stop
3253 * 0x07 = max (set when temperatures critical)
3254 * Some ThinkPads may have other levels, see
3255 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3256 *
3257 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3258 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3259 * does so, its initial value is meaningless (0x07).
3260 *
3261 * For firmware bugs, refer to:
3262 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3263 *
3264 * ----
3265 *
3266 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3267 * Main fan tachometer reading (in RPM)
3268 *
3269 * This register is present on all ThinkPads with a new-style EC, and
3270 * it is known not to be present on the A21m/e, and T22, as there is
3271 * something else in offset 0x84 according to the ACPI DSDT. Other
3272 * ThinkPads from this same time period (and earlier) probably lack the
3273 * tachometer as well.
3274 *
3275 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3276 * was never fixed by IBM to report the EC firmware version string
3277 * probably support the tachometer (like the early X models), so
3278 * detecting it is quite hard. We need more data to know for sure.
3279 *
3280 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3281 * might result.
3282 *
3283 * FIRMWARE BUG: may go stale while the EC is switching to full speed
3284 * mode.
3285 *
3286 * For firmware bugs, refer to:
3287 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3288 *
3289 * TPACPI_FAN_WR_ACPI_FANS:
3290 * ThinkPad X31, X40, X41. Not available in the X60.
3291 *
3292 * FANS ACPI handle: takes three arguments: low speed, medium speed,
3293 * high speed. ACPI DSDT seems to map these three speeds to levels
3294 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3295 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3296 *
3297 * The speeds are stored on handles
3298 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3299 *
3300 * There are three default speed sets, acessible as handles:
3301 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3302 *
3303 * ACPI DSDT switches which set is in use depending on various
3304 * factors.
3305 *
3306 * TPACPI_FAN_WR_TPEC is also available and should be used to
3307 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
3308 * but the ACPI tables just mention level 7.
3309 */
3310
3311 static enum fan_status_access_mode fan_status_access_mode;
3312 static enum fan_control_access_mode fan_control_access_mode;
3313 static enum fan_control_commands fan_control_commands;
3314
3315 static u8 fan_control_initial_status;
3316 static u8 fan_control_desired_level;
3317
3318 static void fan_watchdog_fire(struct work_struct *ignored);
3319 static int fan_watchdog_maxinterval;
3320 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3321
3322 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
3323 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
3324 "\\FSPD", /* 600e/x, 770e, 770x */
3325 ); /* all others */
3326 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
3327 "JFNS", /* 770x-JL */
3328 ); /* all others */
3329
3330 /*
3331 * SYSFS fan layout: hwmon compatible (device)
3332 *
3333 * pwm*_enable:
3334 * 0: "disengaged" mode
3335 * 1: manual mode
3336 * 2: native EC "auto" mode (recommended, hardware default)
3337 *
3338 * pwm*: set speed in manual mode, ignored otherwise.
3339 * 0 is level 0; 255 is level 7. Intermediate points done with linear
3340 * interpolation.
3341 *
3342 * fan*_input: tachometer reading, RPM
3343 *
3344 *
3345 * SYSFS fan layout: extensions
3346 *
3347 * fan_watchdog (driver):
3348 * fan watchdog interval in seconds, 0 disables (default), max 120
3349 */
3350
3351 /* sysfs fan pwm1_enable ----------------------------------------------- */
3352 static ssize_t fan_pwm1_enable_show(struct device *dev,
3353 struct device_attribute *attr,
3354 char *buf)
3355 {
3356 int res, mode;
3357 u8 status;
3358
3359 res = fan_get_status_safe(&status);
3360 if (res)
3361 return res;
3362
3363 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3364 if (status != fan_control_initial_status) {
3365 tp_features.fan_ctrl_status_undef = 0;
3366 } else {
3367 /* Return most likely status. In fact, it
3368 * might be the only possible status */
3369 status = TP_EC_FAN_AUTO;
3370 }
3371 }
3372
3373 if (status & TP_EC_FAN_FULLSPEED) {
3374 mode = 0;
3375 } else if (status & TP_EC_FAN_AUTO) {
3376 mode = 2;
3377 } else
3378 mode = 1;
3379
3380 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3381 }
3382
3383 static ssize_t fan_pwm1_enable_store(struct device *dev,
3384 struct device_attribute *attr,
3385 const char *buf, size_t count)
3386 {
3387 unsigned long t;
3388 int res, level;
3389
3390 if (parse_strtoul(buf, 2, &t))
3391 return -EINVAL;
3392
3393 switch (t) {
3394 case 0:
3395 level = TP_EC_FAN_FULLSPEED;
3396 break;
3397 case 1:
3398 level = TPACPI_FAN_LAST_LEVEL;
3399 break;
3400 case 2:
3401 level = TP_EC_FAN_AUTO;
3402 break;
3403 case 3:
3404 /* reserved for software-controlled auto mode */
3405 return -ENOSYS;
3406 default:
3407 return -EINVAL;
3408 }
3409
3410 res = fan_set_level_safe(level);
3411 if (res == -ENXIO)
3412 return -EINVAL;
3413 else if (res < 0)
3414 return res;
3415
3416 fan_watchdog_reset();
3417
3418 return count;
3419 }
3420
3421 static struct device_attribute dev_attr_fan_pwm1_enable =
3422 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3423 fan_pwm1_enable_show, fan_pwm1_enable_store);
3424
3425 /* sysfs fan pwm1 ------------------------------------------------------ */
3426 static ssize_t fan_pwm1_show(struct device *dev,
3427 struct device_attribute *attr,
3428 char *buf)
3429 {
3430 int res;
3431 u8 status;
3432
3433 res = fan_get_status_safe(&status);
3434 if (res)
3435 return res;
3436
3437 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3438 if (status != fan_control_initial_status) {
3439 tp_features.fan_ctrl_status_undef = 0;
3440 } else {
3441 status = TP_EC_FAN_AUTO;
3442 }
3443 }
3444
3445 if ((status &
3446 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3447 status = fan_control_desired_level;
3448
3449 if (status > 7)
3450 status = 7;
3451
3452 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3453 }
3454
3455 static ssize_t fan_pwm1_store(struct device *dev,
3456 struct device_attribute *attr,
3457 const char *buf, size_t count)
3458 {
3459 unsigned long s;
3460 int rc;
3461 u8 status, newlevel;
3462
3463 if (parse_strtoul(buf, 255, &s))
3464 return -EINVAL;
3465
3466 /* scale down from 0-255 to 0-7 */
3467 newlevel = (s >> 5) & 0x07;
3468
3469 rc = mutex_lock_interruptible(&fan_mutex);
3470 if (rc < 0)
3471 return rc;
3472
3473 rc = fan_get_status(&status);
3474 if (!rc && (status &
3475 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3476 rc = fan_set_level(newlevel);
3477 if (rc == -ENXIO)
3478 rc = -EINVAL;
3479 else if (!rc) {
3480 fan_update_desired_level(newlevel);
3481 fan_watchdog_reset();
3482 }
3483 }
3484
3485 mutex_unlock(&fan_mutex);
3486 return (rc)? rc : count;
3487 }
3488
3489 static struct device_attribute dev_attr_fan_pwm1 =
3490 __ATTR(pwm1, S_IWUSR | S_IRUGO,
3491 fan_pwm1_show, fan_pwm1_store);
3492
3493 /* sysfs fan fan1_input ------------------------------------------------ */
3494 static ssize_t fan_fan1_input_show(struct device *dev,
3495 struct device_attribute *attr,
3496 char *buf)
3497 {
3498 int res;
3499 unsigned int speed;
3500
3501 res = fan_get_speed(&speed);
3502 if (res < 0)
3503 return res;
3504
3505 return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3506 }
3507
3508 static struct device_attribute dev_attr_fan_fan1_input =
3509 __ATTR(fan1_input, S_IRUGO,
3510 fan_fan1_input_show, NULL);
3511
3512 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3513 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3514 char *buf)
3515 {
3516 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3517 }
3518
3519 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3520 const char *buf, size_t count)
3521 {
3522 unsigned long t;
3523
3524 if (parse_strtoul(buf, 120, &t))
3525 return -EINVAL;
3526
3527 if (!fan_control_allowed)
3528 return -EPERM;
3529
3530 fan_watchdog_maxinterval = t;
3531 fan_watchdog_reset();
3532
3533 return count;
3534 }
3535
3536 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3537 fan_fan_watchdog_show, fan_fan_watchdog_store);
3538
3539 /* --------------------------------------------------------------------- */
3540 static struct attribute *fan_attributes[] = {
3541 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3542 &dev_attr_fan_fan1_input.attr,
3543 NULL
3544 };
3545
3546 static const struct attribute_group fan_attr_group = {
3547 .attrs = fan_attributes,
3548 };
3549
3550 static int __init fan_init(struct ibm_init_struct *iibm)
3551 {
3552 int rc;
3553
3554 vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3555
3556 mutex_init(&fan_mutex);
3557 fan_status_access_mode = TPACPI_FAN_NONE;
3558 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3559 fan_control_commands = 0;
3560 fan_watchdog_maxinterval = 0;
3561 tp_features.fan_ctrl_status_undef = 0;
3562 fan_control_desired_level = 7;
3563
3564 IBM_ACPIHANDLE_INIT(fans);
3565 IBM_ACPIHANDLE_INIT(gfan);
3566 IBM_ACPIHANDLE_INIT(sfan);
3567
3568 if (gfan_handle) {
3569 /* 570, 600e/x, 770e, 770x */
3570 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3571 } else {
3572 /* all other ThinkPads: note that even old-style
3573 * ThinkPad ECs supports the fan control register */
3574 if (likely(acpi_ec_read(fan_status_offset,
3575 &fan_control_initial_status))) {
3576 fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3577
3578 /* In some ThinkPads, neither the EC nor the ACPI
3579 * DSDT initialize the fan status, and it ends up
3580 * being set to 0x07 when it *could* be either
3581 * 0x07 or 0x80.
3582 *
3583 * Enable for TP-1Y (T43), TP-78 (R51e),
3584 * TP-76 (R52), TP-70 (T43, R52), which are known
3585 * to be buggy. */
3586 if (fan_control_initial_status == 0x07) {
3587 switch (thinkpad_id.ec_model) {
3588 case 0x5931: /* TP-1Y */
3589 case 0x3837: /* TP-78 */
3590 case 0x3637: /* TP-76 */
3591 case 0x3037: /* TP-70 */
3592 printk(IBM_NOTICE
3593 "fan_init: initial fan status is "
3594 "unknown, assuming it is in auto "
3595 "mode\n");
3596 tp_features.fan_ctrl_status_undef = 1;
3597 ;;
3598 }
3599 }
3600 } else {
3601 printk(IBM_ERR
3602 "ThinkPad ACPI EC access misbehaving, "
3603 "fan status and control unavailable\n");
3604 return 1;
3605 }
3606 }
3607
3608 if (sfan_handle) {
3609 /* 570, 770x-JL */
3610 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3611 fan_control_commands |=
3612 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3613 } else {
3614 if (!gfan_handle) {
3615 /* gfan without sfan means no fan control */
3616 /* all other models implement TP EC 0x2f control */
3617
3618 if (fans_handle) {
3619 /* X31, X40, X41 */
3620 fan_control_access_mode =
3621 TPACPI_FAN_WR_ACPI_FANS;
3622 fan_control_commands |=
3623 TPACPI_FAN_CMD_SPEED |
3624 TPACPI_FAN_CMD_LEVEL |
3625 TPACPI_FAN_CMD_ENABLE;
3626 } else {
3627 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3628 fan_control_commands |=
3629 TPACPI_FAN_CMD_LEVEL |
3630 TPACPI_FAN_CMD_ENABLE;
3631 }
3632 }
3633 }
3634
3635 vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3636 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3637 fan_control_access_mode != TPACPI_FAN_WR_NONE),
3638 fan_status_access_mode, fan_control_access_mode);
3639
3640 /* fan control master switch */
3641 if (!fan_control_allowed) {
3642 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3643 fan_control_commands = 0;
3644 dbg_printk(TPACPI_DBG_INIT,
3645 "fan control features disabled by parameter\n");
3646 }
3647
3648 /* update fan_control_desired_level */
3649 if (fan_status_access_mode != TPACPI_FAN_NONE)
3650 fan_get_status_safe(NULL);
3651
3652 if (fan_status_access_mode != TPACPI_FAN_NONE ||
3653 fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3654 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3655 &fan_attr_group);
3656 if (!(rc < 0))
3657 rc = driver_create_file(&tpacpi_pdriver.driver,
3658 &driver_attr_fan_watchdog);
3659 if (rc < 0)
3660 return rc;
3661 return 0;
3662 } else
3663 return 1;
3664 }
3665
3666 /*
3667 * Call with fan_mutex held
3668 */
3669 static void fan_update_desired_level(u8 status)
3670 {
3671 if ((status &
3672 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3673 if (status > 7)
3674 fan_control_desired_level = 7;
3675 else
3676 fan_control_desired_level = status;
3677 }
3678 }
3679
3680 static int fan_get_status(u8 *status)
3681 {
3682 u8 s;
3683
3684 /* TODO:
3685 * Add TPACPI_FAN_RD_ACPI_FANS ? */
3686
3687 switch (fan_status_access_mode) {
3688 case TPACPI_FAN_RD_ACPI_GFAN:
3689 /* 570, 600e/x, 770e, 770x */
3690
3691 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3692 return -EIO;
3693
3694 if (likely(status))
3695 *status = s & 0x07;
3696
3697 break;
3698
3699 case TPACPI_FAN_RD_TPEC:
3700 /* all except 570, 600e/x, 770e, 770x */
3701 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3702 return -EIO;
3703
3704 if (likely(status))
3705 *status = s;
3706
3707 break;
3708
3709 default:
3710 return -ENXIO;
3711 }
3712
3713 return 0;
3714 }
3715
3716 static int fan_get_status_safe(u8 *status)
3717 {
3718 int rc;
3719 u8 s;
3720
3721 rc = mutex_lock_interruptible(&fan_mutex);
3722 if (rc < 0)
3723 return rc;
3724 rc = fan_get_status(&s);
3725 if (!rc)
3726 fan_update_desired_level(s);
3727 mutex_unlock(&fan_mutex);
3728
3729 if (status)
3730 *status = s;
3731
3732 return rc;
3733 }
3734
3735 static void fan_exit(void)
3736 {
3737 vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3738
3739 /* FIXME: can we really do this unconditionally? */
3740 sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3741 driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3742
3743 cancel_delayed_work(&fan_watchdog_task);
3744 flush_scheduled_work();
3745 }
3746
3747 static int fan_get_speed(unsigned int *speed)
3748 {
3749 u8 hi, lo;
3750
3751 switch (fan_status_access_mode) {
3752 case TPACPI_FAN_RD_TPEC:
3753 /* all except 570, 600e/x, 770e, 770x */
3754 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3755 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3756 return -EIO;
3757
3758 if (likely(speed))
3759 *speed = (hi << 8) | lo;
3760
3761 break;
3762
3763 default:
3764 return -ENXIO;
3765 }
3766
3767 return 0;
3768 }
3769
3770 static void fan_watchdog_fire(struct work_struct *ignored)
3771 {
3772 int rc;
3773
3774 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3775 rc = fan_set_enable();
3776 if (rc < 0) {
3777 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3778 "will try again later...\n", -rc);
3779 /* reschedule for later */
3780 fan_watchdog_reset();
3781 }
3782 }
3783
3784 static void fan_watchdog_reset(void)
3785 {
3786 static int fan_watchdog_active;
3787
3788 if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3789 return;
3790
3791 if (fan_watchdog_active)
3792 cancel_delayed_work(&fan_watchdog_task);
3793
3794 if (fan_watchdog_maxinterval > 0) {
3795 fan_watchdog_active = 1;
3796 if (!schedule_delayed_work(&fan_watchdog_task,
3797 msecs_to_jiffies(fan_watchdog_maxinterval
3798 * 1000))) {
3799 printk(IBM_ERR "failed to schedule the fan watchdog, "
3800 "watchdog will not trigger\n");
3801 }
3802 } else
3803 fan_watchdog_active = 0;
3804 }
3805
3806 static int fan_set_level(int level)
3807 {
3808 if (!fan_control_allowed)
3809 return -EPERM;
3810
3811 switch (fan_control_access_mode) {
3812 case TPACPI_FAN_WR_ACPI_SFAN:
3813 if (level >= 0 && level <= 7) {
3814 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3815 return -EIO;
3816 } else
3817 return -EINVAL;
3818 break;
3819
3820 case TPACPI_FAN_WR_ACPI_FANS:
3821 case TPACPI_FAN_WR_TPEC:
3822 if ((level != TP_EC_FAN_AUTO) &&
3823 (level != TP_EC_FAN_FULLSPEED) &&
3824 ((level < 0) || (level > 7)))
3825 return -EINVAL;
3826
3827 /* safety net should the EC not support AUTO
3828 * or FULLSPEED mode bits and just ignore them */
3829 if (level & TP_EC_FAN_FULLSPEED)
3830 level |= 7; /* safety min speed 7 */
3831 else if (level & TP_EC_FAN_FULLSPEED)
3832 level |= 4; /* safety min speed 4 */
3833
3834 if (!acpi_ec_write(fan_status_offset, level))
3835 return -EIO;
3836 else
3837 tp_features.fan_ctrl_status_undef = 0;
3838 break;
3839
3840 default:
3841 return -ENXIO;
3842 }
3843 return 0;
3844 }
3845
3846 static int fan_set_level_safe(int level)
3847 {
3848 int rc;
3849
3850 if (!fan_control_allowed)
3851 return -EPERM;
3852
3853 rc = mutex_lock_interruptible(&fan_mutex);
3854 if (rc < 0)
3855 return rc;
3856
3857 if (level == TPACPI_FAN_LAST_LEVEL)
3858 level = fan_control_desired_level;
3859
3860 rc = fan_set_level(level);
3861 if (!rc)
3862 fan_update_desired_level(level);
3863
3864 mutex_unlock(&fan_mutex);
3865 return rc;
3866 }
3867
3868 static int fan_set_enable(void)
3869 {
3870 u8 s;
3871 int rc;
3872
3873 if (!fan_control_allowed)
3874 return -EPERM;
3875
3876 rc = mutex_lock_interruptible(&fan_mutex);
3877 if (rc < 0)
3878 return rc;
3879
3880 switch (fan_control_access_mode) {
3881 case TPACPI_FAN_WR_ACPI_FANS:
3882 case TPACPI_FAN_WR_TPEC:
3883 rc = fan_get_status(&s);
3884 if (rc < 0)
3885 break;
3886
3887 /* Don't go out of emergency fan mode */
3888 if (s != 7) {
3889 s &= 0x07;
3890 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3891 }
3892
3893 if (!acpi_ec_write(fan_status_offset, s))
3894 rc = -EIO;
3895 else {
3896 tp_features.fan_ctrl_status_undef = 0;
3897 rc = 0;
3898 }
3899 break;
3900
3901 case TPACPI_FAN_WR_ACPI_SFAN:
3902 rc = fan_get_status(&s);
3903 if (rc < 0)
3904 break;
3905
3906 s &= 0x07;
3907
3908 /* Set fan to at least level 4 */
3909 s |= 4;
3910
3911 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3912 rc= -EIO;
3913 else
3914 rc = 0;
3915 break;
3916
3917 default:
3918 rc = -ENXIO;
3919 }
3920
3921 mutex_unlock(&fan_mutex);
3922 return rc;
3923 }
3924
3925 static int fan_set_disable(void)
3926 {
3927 int rc;
3928
3929 if (!fan_control_allowed)
3930 return -EPERM;
3931
3932 rc = mutex_lock_interruptible(&fan_mutex);
3933 if (rc < 0)
3934 return rc;
3935
3936 rc = 0;
3937 switch (fan_control_access_mode) {
3938 case TPACPI_FAN_WR_ACPI_FANS:
3939 case TPACPI_FAN_WR_TPEC:
3940 if (!acpi_ec_write(fan_status_offset, 0x00))
3941 rc = -EIO;
3942 else {
3943 fan_control_desired_level = 0;
3944 tp_features.fan_ctrl_status_undef = 0;
3945 }
3946 break;
3947
3948 case TPACPI_FAN_WR_ACPI_SFAN:
3949 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
3950 rc = -EIO;
3951 else
3952 fan_control_desired_level = 0;
3953 break;
3954
3955 default:
3956 rc = -ENXIO;
3957 }
3958
3959
3960 mutex_unlock(&fan_mutex);
3961 return rc;
3962 }
3963
3964 static int fan_set_speed(int speed)
3965 {
3966 int rc;
3967
3968 if (!fan_control_allowed)
3969 return -EPERM;
3970
3971 rc = mutex_lock_interruptible(&fan_mutex);
3972 if (rc < 0)
3973 return rc;
3974
3975 rc = 0;
3976 switch (fan_control_access_mode) {
3977 case TPACPI_FAN_WR_ACPI_FANS:
3978 if (speed >= 0 && speed <= 65535) {
3979 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3980 speed, speed, speed))
3981 rc = -EIO;
3982 } else
3983 rc = -EINVAL;
3984 break;
3985
3986 default:
3987 rc = -ENXIO;
3988 }
3989
3990 mutex_unlock(&fan_mutex);
3991 return rc;
3992 }
3993
3994 static int fan_read(char *p)
3995 {
3996 int len = 0;
3997 int rc;
3998 u8 status;
3999 unsigned int speed = 0;
4000
4001 switch (fan_status_access_mode) {
4002 case TPACPI_FAN_RD_ACPI_GFAN:
4003 /* 570, 600e/x, 770e, 770x */
4004 if ((rc = fan_get_status_safe(&status)) < 0)
4005 return rc;
4006
4007 len += sprintf(p + len, "status:\t\t%s\n"
4008 "level:\t\t%d\n",
4009 (status != 0) ? "enabled" : "disabled", status);
4010 break;
4011
4012 case TPACPI_FAN_RD_TPEC:
4013 /* all except 570, 600e/x, 770e, 770x */
4014 if ((rc = fan_get_status_safe(&status)) < 0)
4015 return rc;
4016
4017 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4018 if (status != fan_control_initial_status)
4019 tp_features.fan_ctrl_status_undef = 0;
4020 else
4021 /* Return most likely status. In fact, it
4022 * might be the only possible status */
4023 status = TP_EC_FAN_AUTO;
4024 }
4025
4026 len += sprintf(p + len, "status:\t\t%s\n",
4027 (status != 0) ? "enabled" : "disabled");
4028
4029 if ((rc = fan_get_speed(&speed)) < 0)
4030 return rc;
4031
4032 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4033
4034 if (status & TP_EC_FAN_FULLSPEED)
4035 /* Disengaged mode takes precedence */
4036 len += sprintf(p + len, "level:\t\tdisengaged\n");
4037 else if (status & TP_EC_FAN_AUTO)
4038 len += sprintf(p + len, "level:\t\tauto\n");
4039 else
4040 len += sprintf(p + len, "level:\t\t%d\n", status);
4041 break;
4042
4043 case TPACPI_FAN_NONE:
4044 default:
4045 len += sprintf(p + len, "status:\t\tnot supported\n");
4046 }
4047
4048 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4049 len += sprintf(p + len, "commands:\tlevel <level>");
4050
4051 switch (fan_control_access_mode) {
4052 case TPACPI_FAN_WR_ACPI_SFAN:
4053 len += sprintf(p + len, " (<level> is 0-7)\n");
4054 break;
4055
4056 default:
4057 len += sprintf(p + len, " (<level> is 0-7, "
4058 "auto, disengaged, full-speed)\n");
4059 break;
4060 }
4061 }
4062
4063 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4064 len += sprintf(p + len, "commands:\tenable, disable\n"
4065 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4066 "1-120 (seconds))\n");
4067
4068 if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4069 len += sprintf(p + len, "commands:\tspeed <speed>"
4070 " (<speed> is 0-65535)\n");
4071
4072 return len;
4073 }
4074
4075 static int fan_write_cmd_level(const char *cmd, int *rc)
4076 {
4077 int level;
4078
4079 if (strlencmp(cmd, "level auto") == 0)
4080 level = TP_EC_FAN_AUTO;
4081 else if ((strlencmp(cmd, "level disengaged") == 0) |
4082 (strlencmp(cmd, "level full-speed") == 0))
4083 level = TP_EC_FAN_FULLSPEED;
4084 else if (sscanf(cmd, "level %d", &level) != 1)
4085 return 0;
4086
4087 if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4088 printk(IBM_ERR "level command accepted for unsupported "
4089 "access mode %d", fan_control_access_mode);
4090
4091 return 1;
4092 }
4093
4094 static int fan_write_cmd_enable(const char *cmd, int *rc)
4095 {
4096 if (strlencmp(cmd, "enable") != 0)
4097 return 0;
4098
4099 if ((*rc = fan_set_enable()) == -ENXIO)
4100 printk(IBM_ERR "enable command accepted for unsupported "
4101 "access mode %d", fan_control_access_mode);
4102
4103 return 1;
4104 }
4105
4106 static int fan_write_cmd_disable(const char *cmd, int *rc)
4107 {
4108 if (strlencmp(cmd, "disable") != 0)
4109 return 0;
4110
4111 if ((*rc = fan_set_disable()) == -ENXIO)
4112 printk(IBM_ERR "disable command accepted for unsupported "
4113 "access mode %d", fan_control_access_mode);
4114
4115 return 1;
4116 }
4117
4118 static int fan_write_cmd_speed(const char *cmd, int *rc)
4119 {
4120 int speed;
4121
4122 /* TODO:
4123 * Support speed <low> <medium> <high> ? */
4124
4125 if (sscanf(cmd, "speed %d", &speed) != 1)
4126 return 0;
4127
4128 if ((*rc = fan_set_speed(speed)) == -ENXIO)
4129 printk(IBM_ERR "speed command accepted for unsupported "
4130 "access mode %d", fan_control_access_mode);
4131
4132 return 1;
4133 }
4134
4135 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4136 {
4137 int interval;
4138
4139 if (sscanf(cmd, "watchdog %d", &interval) != 1)
4140 return 0;
4141
4142 if (interval < 0 || interval > 120)
4143 *rc = -EINVAL;
4144 else
4145 fan_watchdog_maxinterval = interval;
4146
4147 return 1;
4148 }
4149
4150 static int fan_write(char *buf)
4151 {
4152 char *cmd;
4153 int rc = 0;
4154
4155 while (!rc && (cmd = next_cmd(&buf))) {
4156 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4157 fan_write_cmd_level(cmd, &rc)) &&
4158 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4159 (fan_write_cmd_enable(cmd, &rc) ||
4160 fan_write_cmd_disable(cmd, &rc) ||
4161 fan_write_cmd_watchdog(cmd, &rc))) &&
4162 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4163 fan_write_cmd_speed(cmd, &rc))
4164 )
4165 rc = -EINVAL;
4166 else if (!rc)
4167 fan_watchdog_reset();
4168 }
4169
4170 return rc;
4171 }
4172
4173 static struct ibm_struct fan_driver_data = {
4174 .name = "fan",
4175 .read = fan_read,
4176 .write = fan_write,
4177 .exit = fan_exit,
4178 };
4179
4180 /****************************************************************************
4181 ****************************************************************************
4182 *
4183 * Infrastructure
4184 *
4185 ****************************************************************************
4186 ****************************************************************************/
4187
4188 /* /proc support */
4189 static struct proc_dir_entry *proc_dir;
4190
4191 /* Subdriver registry */
4192 static LIST_HEAD(tpacpi_all_drivers);
4193
4194
4195 /*
4196 * Module and infrastructure proble, init and exit handling
4197 */
4198
4199 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4200 static const char * __init str_supported(int is_supported)
4201 {
4202 static char text_unsupported[] __initdata = "not supported";
4203
4204 return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4205 }
4206 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4207
4208 static int __init ibm_init(struct ibm_init_struct *iibm)
4209 {
4210 int ret;
4211 struct ibm_struct *ibm = iibm->data;
4212 struct proc_dir_entry *entry;
4213
4214 BUG_ON(ibm == NULL);
4215
4216 INIT_LIST_HEAD(&ibm->all_drivers);
4217
4218 if (ibm->flags.experimental && !experimental)
4219 return 0;
4220
4221 dbg_printk(TPACPI_DBG_INIT,
4222 "probing for %s\n", ibm->name);
4223
4224 if (iibm->init) {
4225 ret = iibm->init(iibm);
4226 if (ret > 0)
4227 return 0; /* probe failed */
4228 if (ret)
4229 return ret;
4230
4231 ibm->flags.init_called = 1;
4232 }
4233
4234 if (ibm->acpi) {
4235 if (ibm->acpi->hid) {
4236 ret = register_tpacpi_subdriver(ibm);
4237 if (ret)
4238 goto err_out;
4239 }
4240
4241 if (ibm->acpi->notify) {
4242 ret = setup_acpi_notify(ibm);
4243 if (ret == -ENODEV) {
4244 printk(IBM_NOTICE "disabling subdriver %s\n",
4245 ibm->name);
4246 ret = 0;
4247 goto err_out;
4248 }
4249 if (ret < 0)
4250 goto err_out;
4251 }
4252 }
4253
4254 dbg_printk(TPACPI_DBG_INIT,
4255 "%s installed\n", ibm->name);
4256
4257 if (ibm->read) {
4258 entry = create_proc_entry(ibm->name,
4259 S_IFREG | S_IRUGO | S_IWUSR,
4260 proc_dir);
4261 if (!entry) {
4262 printk(IBM_ERR "unable to create proc entry %s\n",
4263 ibm->name);
4264 ret = -ENODEV;
4265 goto err_out;
4266 }
4267 entry->owner = THIS_MODULE;
4268 entry->data = ibm;
4269 entry->read_proc = &dispatch_procfs_read;
4270 if (ibm->write)
4271 entry->write_proc = &dispatch_procfs_write;
4272 ibm->flags.proc_created = 1;
4273 }
4274
4275 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4276
4277 return 0;
4278
4279 err_out:
4280 dbg_printk(TPACPI_DBG_INIT,
4281 "%s: at error exit path with result %d\n",
4282 ibm->name, ret);
4283
4284 ibm_exit(ibm);
4285 return (ret < 0)? ret : 0;
4286 }
4287
4288 static void ibm_exit(struct ibm_struct *ibm)
4289 {
4290 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4291
4292 list_del_init(&ibm->all_drivers);
4293
4294 if (ibm->flags.acpi_notify_installed) {
4295 dbg_printk(TPACPI_DBG_EXIT,
4296 "%s: acpi_remove_notify_handler\n", ibm->name);
4297 BUG_ON(!ibm->acpi);
4298 acpi_remove_notify_handler(*ibm->acpi->handle,
4299 ibm->acpi->type,
4300 dispatch_acpi_notify);
4301 ibm->flags.acpi_notify_installed = 0;
4302 ibm->flags.acpi_notify_installed = 0;
4303 }
4304
4305 if (ibm->flags.proc_created) {
4306 dbg_printk(TPACPI_DBG_EXIT,
4307 "%s: remove_proc_entry\n", ibm->name);
4308 remove_proc_entry(ibm->name, proc_dir);
4309 ibm->flags.proc_created = 0;
4310 }
4311
4312 if (ibm->flags.acpi_driver_registered) {
4313 dbg_printk(TPACPI_DBG_EXIT,
4314 "%s: acpi_bus_unregister_driver\n", ibm->name);
4315 BUG_ON(!ibm->acpi);
4316 acpi_bus_unregister_driver(ibm->acpi->driver);
4317 kfree(ibm->acpi->driver);
4318 ibm->acpi->driver = NULL;
4319 ibm->flags.acpi_driver_registered = 0;
4320 }
4321
4322 if (ibm->flags.init_called && ibm->exit) {
4323 ibm->exit();
4324 ibm->flags.init_called = 0;
4325 }
4326
4327 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4328 }
4329
4330 /* Probing */
4331
4332 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4333 {
4334 struct dmi_device *dev = NULL;
4335 char ec_fw_string[18];
4336
4337 if (!tp)
4338 return;
4339
4340 memset(tp, 0, sizeof(*tp));
4341
4342 if (dmi_name_in_vendors("IBM"))
4343 tp->vendor = PCI_VENDOR_ID_IBM;
4344 else if (dmi_name_in_vendors("LENOVO"))
4345 tp->vendor = PCI_VENDOR_ID_LENOVO;
4346 else
4347 return;
4348
4349 tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4350 GFP_KERNEL);
4351 if (!tp->bios_version_str)
4352 return;
4353 tp->bios_model = tp->bios_version_str[0]
4354 | (tp->bios_version_str[1] << 8);
4355
4356 /*
4357 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4358 * X32 or newer, all Z series; Some models must have an
4359 * up-to-date BIOS or they will not be detected.
4360 *
4361 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4362 */
4363 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4364 if (sscanf(dev->name,
4365 "IBM ThinkPad Embedded Controller -[%17c",
4366 ec_fw_string) == 1) {
4367 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4368 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4369
4370 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4371 tp->ec_model = ec_fw_string[0]
4372 | (ec_fw_string[1] << 8);
4373 break;
4374 }
4375 }
4376
4377 tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4378 GFP_KERNEL);
4379 if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4380 kfree(tp->model_str);
4381 tp->model_str = NULL;
4382 }
4383 }
4384
4385 static int __init probe_for_thinkpad(void)
4386 {
4387 int is_thinkpad;
4388
4389 if (acpi_disabled)
4390 return -ENODEV;
4391
4392 /*
4393 * Non-ancient models have better DMI tagging, but very old models
4394 * don't.
4395 */
4396 is_thinkpad = (thinkpad_id.model_str != NULL);
4397
4398 /* ec is required because many other handles are relative to it */
4399 IBM_ACPIHANDLE_INIT(ec);
4400 if (!ec_handle) {
4401 if (is_thinkpad)
4402 printk(IBM_ERR
4403 "Not yet supported ThinkPad detected!\n");
4404 return -ENODEV;
4405 }
4406
4407 /*
4408 * Risks a regression on very old machines, but reduces potential
4409 * false positives a damn great deal
4410 */
4411 if (!is_thinkpad)
4412 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4413
4414 if (!is_thinkpad && !force_load)
4415 return -ENODEV;
4416
4417 return 0;
4418 }
4419
4420
4421 /* Module init, exit, parameters */
4422
4423 static struct ibm_init_struct ibms_init[] __initdata = {
4424 {
4425 .init = thinkpad_acpi_driver_init,
4426 .data = &thinkpad_acpi_driver_data,
4427 },
4428 {
4429 .init = hotkey_init,
4430 .data = &hotkey_driver_data,
4431 },
4432 {
4433 .init = bluetooth_init,
4434 .data = &bluetooth_driver_data,
4435 },
4436 {
4437 .init = wan_init,
4438 .data = &wan_driver_data,
4439 },
4440 {
4441 .init = video_init,
4442 .data = &video_driver_data,
4443 },
4444 {
4445 .init = light_init,
4446 .data = &light_driver_data,
4447 },
4448 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4449 {
4450 .init = dock_init,
4451 .data = &dock_driver_data[0],
4452 },
4453 {
4454 .init = dock_init2,
4455 .data = &dock_driver_data[1],
4456 },
4457 #endif
4458 #ifdef CONFIG_THINKPAD_ACPI_BAY
4459 {
4460 .init = bay_init,
4461 .data = &bay_driver_data,
4462 },
4463 #endif
4464 {
4465 .init = cmos_init,
4466 .data = &cmos_driver_data,
4467 },
4468 {
4469 .init = led_init,
4470 .data = &led_driver_data,
4471 },
4472 {
4473 .init = beep_init,
4474 .data = &beep_driver_data,
4475 },
4476 {
4477 .init = thermal_init,
4478 .data = &thermal_driver_data,
4479 },
4480 {
4481 .data = &ecdump_driver_data,
4482 },
4483 {
4484 .init = brightness_init,
4485 .data = &brightness_driver_data,
4486 },
4487 {
4488 .data = &volume_driver_data,
4489 },
4490 {
4491 .init = fan_init,
4492 .data = &fan_driver_data,
4493 },
4494 };
4495
4496 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4497 {
4498 unsigned int i;
4499 struct ibm_struct *ibm;
4500
4501 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4502 ibm = ibms_init[i].data;
4503 BUG_ON(ibm == NULL);
4504
4505 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4506 if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4507 return -ENOSPC;
4508 strcpy(ibms_init[i].param, val);
4509 strcat(ibms_init[i].param, ",");
4510 return 0;
4511 }
4512 }
4513
4514 return -EINVAL;
4515 }
4516
4517 static int experimental;
4518 module_param(experimental, int, 0);
4519
4520 static u32 dbg_level;
4521 module_param_named(debug, dbg_level, uint, 0);
4522
4523 static int force_load;
4524 module_param(force_load, bool, 0);
4525
4526 static int fan_control_allowed;
4527 module_param_named(fan_control, fan_control_allowed, bool, 0);
4528
4529 static int brightness_mode;
4530 module_param_named(brightness_mode, brightness_mode, int, 0);
4531
4532 #define IBM_PARAM(feature) \
4533 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4534
4535 IBM_PARAM(hotkey);
4536 IBM_PARAM(bluetooth);
4537 IBM_PARAM(video);
4538 IBM_PARAM(light);
4539 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4540 IBM_PARAM(dock);
4541 #endif
4542 #ifdef CONFIG_THINKPAD_ACPI_BAY
4543 IBM_PARAM(bay);
4544 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4545 IBM_PARAM(cmos);
4546 IBM_PARAM(led);
4547 IBM_PARAM(beep);
4548 IBM_PARAM(ecdump);
4549 IBM_PARAM(brightness);
4550 IBM_PARAM(volume);
4551 IBM_PARAM(fan);
4552
4553 static int __init thinkpad_acpi_module_init(void)
4554 {
4555 int ret, i;
4556
4557 /* Driver-level probe */
4558
4559 get_thinkpad_model_data(&thinkpad_id);
4560 ret = probe_for_thinkpad();
4561 if (ret) {
4562 thinkpad_acpi_module_exit();
4563 return ret;
4564 }
4565
4566 /* Driver initialization */
4567
4568 IBM_ACPIHANDLE_INIT(ecrd);
4569 IBM_ACPIHANDLE_INIT(ecwr);
4570
4571 proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4572 if (!proc_dir) {
4573 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4574 thinkpad_acpi_module_exit();
4575 return -ENODEV;
4576 }
4577 proc_dir->owner = THIS_MODULE;
4578
4579 ret = platform_driver_register(&tpacpi_pdriver);
4580 if (ret) {
4581 printk(IBM_ERR "unable to register platform driver\n");
4582 thinkpad_acpi_module_exit();
4583 return ret;
4584 }
4585 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4586 if (ret) {
4587 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4588 thinkpad_acpi_module_exit();
4589 return ret;
4590 }
4591
4592
4593 /* Device initialization */
4594 tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4595 NULL, 0);
4596 if (IS_ERR(tpacpi_pdev)) {
4597 ret = PTR_ERR(tpacpi_pdev);
4598 tpacpi_pdev = NULL;
4599 printk(IBM_ERR "unable to register platform device\n");
4600 thinkpad_acpi_module_exit();
4601 return ret;
4602 }
4603 tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4604 if (IS_ERR(tpacpi_hwmon)) {
4605 ret = PTR_ERR(tpacpi_hwmon);
4606 tpacpi_hwmon = NULL;
4607 printk(IBM_ERR "unable to register hwmon device\n");
4608 thinkpad_acpi_module_exit();
4609 return ret;
4610 }
4611 tpacpi_inputdev = input_allocate_device();
4612 if (!tpacpi_inputdev) {
4613 printk(IBM_ERR "unable to allocate input device\n");
4614 thinkpad_acpi_module_exit();
4615 return -ENOMEM;
4616 } else {
4617 /* Prepare input device, but don't register */
4618 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4619 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4620 tpacpi_inputdev->id.bustype = BUS_HOST;
4621 tpacpi_inputdev->id.vendor = TPACPI_HKEY_INPUT_VENDOR;
4622 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4623 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4624 }
4625 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4626 ret = ibm_init(&ibms_init[i]);
4627 if (ret >= 0 && *ibms_init[i].param)
4628 ret = ibms_init[i].data->write(ibms_init[i].param);
4629 if (ret < 0) {
4630 thinkpad_acpi_module_exit();
4631 return ret;
4632 }
4633 }
4634 ret = input_register_device(tpacpi_inputdev);
4635 if (ret < 0) {
4636 printk(IBM_ERR "unable to register input device\n");
4637 thinkpad_acpi_module_exit();
4638 return ret;
4639 } else {
4640 tp_features.input_device_registered = 1;
4641 }
4642
4643 return 0;
4644 }
4645
4646 static void thinkpad_acpi_module_exit(void)
4647 {
4648 struct ibm_struct *ibm, *itmp;
4649
4650 list_for_each_entry_safe_reverse(ibm, itmp,
4651 &tpacpi_all_drivers,
4652 all_drivers) {
4653 ibm_exit(ibm);
4654 }
4655
4656 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4657
4658 if (tpacpi_inputdev) {
4659 if (tp_features.input_device_registered)
4660 input_unregister_device(tpacpi_inputdev);
4661 else
4662 input_free_device(tpacpi_inputdev);
4663 }
4664
4665 if (tpacpi_hwmon)
4666 hwmon_device_unregister(tpacpi_hwmon);
4667
4668 if (tpacpi_pdev)
4669 platform_device_unregister(tpacpi_pdev);
4670
4671 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4672 platform_driver_unregister(&tpacpi_pdriver);
4673
4674 if (proc_dir)
4675 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4676
4677 kfree(thinkpad_id.bios_version_str);
4678 kfree(thinkpad_id.ec_version_str);
4679 kfree(thinkpad_id.model_str);
4680 }
4681
4682 module_init(thinkpad_acpi_module_init);
4683 module_exit(thinkpad_acpi_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree