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ACPI: ibm-acpi: add header file
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / ibm_acpi.c
blobe2da95498f32ed96062371b1a49290c7efd425ec
1 /*
2 * ibm_acpi.c - IBM ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 * Copyright (C) 2006 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #define IBM_VERSION "0.13"
24
25 /*
26 * Changelog:
27 *
28 * 2006-11-22 0.13 new maintainer
29 * changelog now lives in git commit history, and will
30 * not be updated further in-file.
31 *
32 * 2005-08-17 0.12 fix compilation on 2.6.13-rc kernels
33 * 2005-03-17 0.11 support for 600e, 770x
34 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
35 * support for 770e, G41
36 * G40 and G41 don't have a thinklight
37 * temperatures no longer experimental
38 * experimental brightness control
39 * experimental volume control
40 * experimental fan enable/disable
41 * 2005-01-16 0.10 fix module loading on R30, R31
42 * 2005-01-16 0.9 support for 570, R30, R31
43 * ultrabay support on A22p, A3x
44 * limit arg for cmos, led, beep, drop experimental status
45 * more capable led control on A21e, A22p, T20-22, X20
46 * experimental temperatures and fan speed
47 * experimental embedded controller register dump
48 * mark more functions as __init, drop incorrect __exit
49 * use MODULE_VERSION
50 * thanks to Henrik Brix Andersen <brix@gentoo.org>
51 * fix parameter passing on module loading
52 * thanks to Rusty Russell <rusty@rustcorp.com.au>
53 * thanks to Jim Radford <radford@blackbean.org>
54 * 2004-11-08 0.8 fix init error case, don't return from a macro
55 * thanks to Chris Wright <chrisw@osdl.org>
56 * 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
57 * fix led control on A21e
58 * 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
59 * 2004-10-18 0.5 thinklight support on A21e, G40, R32, T20, T21, X20
60 * proc file format changed
61 * video_switch command
62 * experimental cmos control
63 * experimental led control
64 * experimental acpi sounds
65 * 2004-09-16 0.4 support for module parameters
66 * hotkey mask can be prefixed by 0x
67 * video output switching
68 * video expansion control
69 * ultrabay eject support
70 * removed lcd brightness/on/off control, didn't work
71 * 2004-08-17 0.3 support for R40
72 * lcd off, brightness control
73 * thinklight on/off
74 * 2004-08-14 0.2 support for T series, X20
75 * bluetooth enable/disable
76 * hotkey events disabled by default
77 * removed fan control, currently useless
78 * 2004-08-09 0.1 initial release, support for X series
79 */
80
81 #include "ibm_acpi.h"
82
83 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
84 MODULE_DESCRIPTION(IBM_DESC);
85 MODULE_VERSION(IBM_VERSION);
86 MODULE_LICENSE("GPL");
87
88 #define __unused __attribute__ ((unused))
89
90 static int experimental;
91 module_param(experimental, int, 0);
92
93 static acpi_handle root_handle = NULL;
94
95 #define IBM_HANDLE(object, parent, paths...) \
96 static acpi_handle object##_handle; \
97 static acpi_handle *object##_parent = &parent##_handle; \
98 static char *object##_path; \
99 static char *object##_paths[] = { paths }
100
101 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
102 "\\_SB.PCI.ISA.EC", /* 570 */
103 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
104 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
105 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
106 "\\_SB.PCI0.ICH3.EC0", /* R31 */
107 "\\_SB.PCI0.LPC.EC", /* all others */
108 );
109
110 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
111 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
112 "\\_SB.PCI0.VID0", /* 770e */
113 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
114 "\\_SB.PCI0.AGP.VID", /* all others */
115 ); /* R30, R31 */
116
117 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
118
119 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
120 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
121 "\\CMS", /* R40, R40e */
122 ); /* all others */
123 #ifdef CONFIG_ACPI_IBM_DOCK
124 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
125 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
126 "\\_SB.PCI0.PCI1.DOCK", /* all others */
127 "\\_SB.PCI.ISA.SLCE", /* 570 */
128 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
129 #endif
130 #ifdef CONFIG_ACPI_IBM_BAY
131 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
132 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
133 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
134 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
135 ); /* A21e, R30, R31 */
136
137 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
138 "_EJ0", /* all others */
139 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
140
141 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
142 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
143 ); /* all others */
144
145 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
146 "_EJ0", /* 770x */
147 ); /* all others */
148 #endif /* CONFIG_ACPI_IBM_BAY */
149
150 /* don't list other alternatives as we install a notify handler on the 570 */
151 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
152
153 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
154 "^HKEY", /* R30, R31 */
155 "HKEY", /* all others */
156 ); /* 570 */
157
158 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
159 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
160
161 IBM_HANDLE(led, ec, "SLED", /* 570 */
162 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
163 "LED", /* all others */
164 ); /* R30, R31 */
165
166 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
167 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
168 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
169 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
170
171 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
172 "\\FSPD", /* 600e/x, 770e, 770x */
173 ); /* all others */
174
175 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
176 "JFNS", /* 770x-JL */
177 ); /* all others */
178
179 /*
180 * FAN ACCESS MODES
181 *
182 * IBMACPI_FAN_RD_ACPI_GFAN:
183 * ACPI GFAN method: returns fan level
184 *
185 * see IBMACPI_FAN_WR_ACPI_SFAN
186 * EC 0x2f not available if GFAN exists
187 *
188 * IBMACPI_FAN_WR_ACPI_SFAN:
189 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
190 *
191 * EC 0x2f might be available *for reading*, but never for writing.
192 *
193 * IBMACPI_FAN_WR_TPEC:
194 * ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
195 * on almost all ThinkPads
196 *
197 * Fan speed changes of any sort (including those caused by the
198 * disengaged mode) are usually done slowly by the firmware as the
199 * maximum ammount of fan duty cycle change per second seems to be
200 * limited.
201 *
202 * Reading is not available if GFAN exists.
203 * Writing is not available if SFAN exists.
204 *
205 * Bits
206 * 7 automatic mode engaged;
207 * (default operation mode of the ThinkPad)
208 * fan level is ignored in this mode.
209 * 6 disengage mode (takes precedence over bit 7);
210 * not available on all thinkpads. May disable
211 * the tachometer, and speeds up fan to 100% duty-cycle,
212 * which speeds it up far above the standard RPM
213 * levels. It is not impossible that it could cause
214 * hardware damage.
215 * 5-3 unused in some models. Extra bits for fan level
216 * in others, but still useless as all values above
217 * 7 map to the same speed as level 7 in these models.
218 * 2-0 fan level (0..7 usually)
219 * 0x00 = stop
220 * 0x07 = max (set when temperatures critical)
221 * Some ThinkPads may have other levels, see
222 * IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
223 *
224 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
225 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
226 * does so, its initial value is meaningless (0x07).
227 *
228 * For firmware bugs, refer to:
229 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
230 *
231 * ----
232 *
233 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
234 * Main fan tachometer reading (in RPM)
235 *
236 * This register is present on all ThinkPads with a new-style EC, and
237 * it is known not to be present on the A21m/e, and T22, as there is
238 * something else in offset 0x84 according to the ACPI DSDT. Other
239 * ThinkPads from this same time period (and earlier) probably lack the
240 * tachometer as well.
241 *
242 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
243 * was never fixed by IBM to report the EC firmware version string
244 * probably support the tachometer (like the early X models), so
245 * detecting it is quite hard. We need more data to know for sure.
246 *
247 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
248 * might result.
249 *
250 * FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
251 * register is not invalidated in ThinkPads that disable tachometer
252 * readings. Thus, the tachometer readings go stale.
253 *
254 * For firmware bugs, refer to:
255 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
256 *
257 * IBMACPI_FAN_WR_ACPI_FANS:
258 * ThinkPad X31, X40, X41. Not available in the X60.
259 *
260 * FANS ACPI handle: takes three arguments: low speed, medium speed,
261 * high speed. ACPI DSDT seems to map these three speeds to levels
262 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
263 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
264 *
265 * The speeds are stored on handles
266 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
267 *
268 * There are three default speed sets, acessible as handles:
269 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
270 *
271 * ACPI DSDT switches which set is in use depending on various
272 * factors.
273 *
274 * IBMACPI_FAN_WR_TPEC is also available and should be used to
275 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
276 * but the ACPI tables just mention level 7.
277 */
278
279 static char *ibm_thinkpad_ec_found = NULL;
280
281 static struct proc_dir_entry *proc_dir = NULL;
282
283 static struct backlight_device *ibm_backlight_device = NULL;
284
285 static int acpi_evalf(acpi_handle handle,
286 void *res, char *method, char *fmt, ...)
287 {
288 char *fmt0 = fmt;
289 struct acpi_object_list params;
290 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
291 struct acpi_buffer result, *resultp;
292 union acpi_object out_obj;
293 acpi_status status;
294 va_list ap;
295 char res_type;
296 int success;
297 int quiet;
298
299 if (!*fmt) {
300 printk(IBM_ERR "acpi_evalf() called with empty format\n");
301 return 0;
302 }
303
304 if (*fmt == 'q') {
305 quiet = 1;
306 fmt++;
307 } else
308 quiet = 0;
309
310 res_type = *(fmt++);
311
312 params.count = 0;
313 params.pointer = &in_objs[0];
314
315 va_start(ap, fmt);
316 while (*fmt) {
317 char c = *(fmt++);
318 switch (c) {
319 case 'd': /* int */
320 in_objs[params.count].integer.value = va_arg(ap, int);
321 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
322 break;
323 /* add more types as needed */
324 default:
325 printk(IBM_ERR "acpi_evalf() called "
326 "with invalid format character '%c'\n", c);
327 return 0;
328 }
329 }
330 va_end(ap);
331
332 if (res_type != 'v') {
333 result.length = sizeof(out_obj);
334 result.pointer = &out_obj;
335 resultp = &result;
336 } else
337 resultp = NULL;
338
339 status = acpi_evaluate_object(handle, method, &params, resultp);
340
341 switch (res_type) {
342 case 'd': /* int */
343 if (res)
344 *(int *)res = out_obj.integer.value;
345 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
346 break;
347 case 'v': /* void */
348 success = status == AE_OK;
349 break;
350 /* add more types as needed */
351 default:
352 printk(IBM_ERR "acpi_evalf() called "
353 "with invalid format character '%c'\n", res_type);
354 return 0;
355 }
356
357 if (!success && !quiet)
358 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
359 method, fmt0, status);
360
361 return success;
362 }
363
364 static void __unused acpi_print_int(acpi_handle handle, char *method)
365 {
366 int i;
367
368 if (acpi_evalf(handle, &i, method, "d"))
369 printk(IBM_INFO "%s = 0x%x\n", method, i);
370 else
371 printk(IBM_ERR "error calling %s\n", method);
372 }
373
374 static char *next_cmd(char **cmds)
375 {
376 char *start = *cmds;
377 char *end;
378
379 while ((end = strchr(start, ',')) && end == start)
380 start = end + 1;
381
382 if (!end)
383 return NULL;
384
385 *end = 0;
386 *cmds = end + 1;
387 return start;
388 }
389
390 static int ibm_acpi_driver_init(void)
391 {
392 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
393 printk(IBM_INFO "%s\n", IBM_URL);
394
395 if (ibm_thinkpad_ec_found)
396 printk(IBM_INFO "ThinkPad EC firmware %s\n",
397 ibm_thinkpad_ec_found);
398
399 return 0;
400 }
401
402 static int ibm_acpi_driver_read(char *p)
403 {
404 int len = 0;
405
406 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
407 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
408
409 return len;
410 }
411
412 static int hotkey_supported;
413 static int hotkey_mask_supported;
414 static int hotkey_orig_status;
415 static int hotkey_orig_mask;
416
417 static int hotkey_get(int *status, int *mask)
418 {
419 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
420 return 0;
421
422 if (hotkey_mask_supported)
423 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
424 return 0;
425
426 return 1;
427 }
428
429 static int hotkey_set(int status, int mask)
430 {
431 int i;
432
433 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
434 return 0;
435
436 if (hotkey_mask_supported)
437 for (i = 0; i < 32; i++) {
438 int bit = ((1 << i) & mask) != 0;
439 if (!acpi_evalf(hkey_handle,
440 NULL, "MHKM", "vdd", i + 1, bit))
441 return 0;
442 }
443
444 return 1;
445 }
446
447 static int hotkey_init(void)
448 {
449 /* hotkey not supported on 570 */
450 hotkey_supported = hkey_handle != NULL;
451
452 if (hotkey_supported) {
453 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
454 A30, R30, R31, T20-22, X20-21, X22-24 */
455 hotkey_mask_supported =
456 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
457
458 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
459 return -ENODEV;
460 }
461
462 return 0;
463 }
464
465 static int hotkey_read(char *p)
466 {
467 int status, mask;
468 int len = 0;
469
470 if (!hotkey_supported) {
471 len += sprintf(p + len, "status:\t\tnot supported\n");
472 return len;
473 }
474
475 if (!hotkey_get(&status, &mask))
476 return -EIO;
477
478 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
479 if (hotkey_mask_supported) {
480 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
481 len += sprintf(p + len,
482 "commands:\tenable, disable, reset, <mask>\n");
483 } else {
484 len += sprintf(p + len, "mask:\t\tnot supported\n");
485 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
486 }
487
488 return len;
489 }
490
491 static int hotkey_write(char *buf)
492 {
493 int status, mask;
494 char *cmd;
495 int do_cmd = 0;
496
497 if (!hotkey_supported)
498 return -ENODEV;
499
500 if (!hotkey_get(&status, &mask))
501 return -EIO;
502
503 while ((cmd = next_cmd(&buf))) {
504 if (strlencmp(cmd, "enable") == 0) {
505 status = 1;
506 } else if (strlencmp(cmd, "disable") == 0) {
507 status = 0;
508 } else if (strlencmp(cmd, "reset") == 0) {
509 status = hotkey_orig_status;
510 mask = hotkey_orig_mask;
511 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
512 /* mask set */
513 } else if (sscanf(cmd, "%x", &mask) == 1) {
514 /* mask set */
515 } else
516 return -EINVAL;
517 do_cmd = 1;
518 }
519
520 if (do_cmd && !hotkey_set(status, mask))
521 return -EIO;
522
523 return 0;
524 }
525
526 static void hotkey_exit(void)
527 {
528 if (hotkey_supported)
529 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
530 }
531
532 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
533 {
534 int hkey;
535
536 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
537 acpi_bus_generate_event(ibm->device, event, hkey);
538 else {
539 printk(IBM_ERR "unknown hotkey event %d\n", event);
540 acpi_bus_generate_event(ibm->device, event, 0);
541 }
542 }
543
544 static int bluetooth_supported;
545
546 static int bluetooth_init(void)
547 {
548 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
549 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
550 bluetooth_supported = hkey_handle &&
551 acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
552
553 return 0;
554 }
555
556 static int bluetooth_status(void)
557 {
558 int status;
559
560 if (!bluetooth_supported ||
561 !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
562 status = 0;
563
564 return status;
565 }
566
567 static int bluetooth_read(char *p)
568 {
569 int len = 0;
570 int status = bluetooth_status();
571
572 if (!bluetooth_supported)
573 len += sprintf(p + len, "status:\t\tnot supported\n");
574 else if (!(status & 1))
575 len += sprintf(p + len, "status:\t\tnot installed\n");
576 else {
577 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
578 len += sprintf(p + len, "commands:\tenable, disable\n");
579 }
580
581 return len;
582 }
583
584 static int bluetooth_write(char *buf)
585 {
586 int status = bluetooth_status();
587 char *cmd;
588 int do_cmd = 0;
589
590 if (!bluetooth_supported)
591 return -ENODEV;
592
593 while ((cmd = next_cmd(&buf))) {
594 if (strlencmp(cmd, "enable") == 0) {
595 status |= 2;
596 } else if (strlencmp(cmd, "disable") == 0) {
597 status &= ~2;
598 } else
599 return -EINVAL;
600 do_cmd = 1;
601 }
602
603 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
604 return -EIO;
605
606 return 0;
607 }
608
609 static int wan_supported;
610
611 static int wan_init(void)
612 {
613 wan_supported = hkey_handle &&
614 acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
615
616 return 0;
617 }
618
619 static int wan_status(void)
620 {
621 int status;
622
623 if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
624 status = 0;
625
626 return status;
627 }
628
629 static int wan_read(char *p)
630 {
631 int len = 0;
632 int status = wan_status();
633
634 if (!wan_supported)
635 len += sprintf(p + len, "status:\t\tnot supported\n");
636 else if (!(status & 1))
637 len += sprintf(p + len, "status:\t\tnot installed\n");
638 else {
639 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
640 len += sprintf(p + len, "commands:\tenable, disable\n");
641 }
642
643 return len;
644 }
645
646 static int wan_write(char *buf)
647 {
648 int status = wan_status();
649 char *cmd;
650 int do_cmd = 0;
651
652 if (!wan_supported)
653 return -ENODEV;
654
655 while ((cmd = next_cmd(&buf))) {
656 if (strlencmp(cmd, "enable") == 0) {
657 status |= 2;
658 } else if (strlencmp(cmd, "disable") == 0) {
659 status &= ~2;
660 } else
661 return -EINVAL;
662 do_cmd = 1;
663 }
664
665 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
666 return -EIO;
667
668 return 0;
669 }
670
671 static enum video_access_mode video_supported;
672 static int video_orig_autosw;
673
674 static int video_init(void)
675 {
676 int ivga;
677
678 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
679 /* G41, assume IVGA doesn't change */
680 vid_handle = vid2_handle;
681
682 if (!vid_handle)
683 /* video switching not supported on R30, R31 */
684 video_supported = IBMACPI_VIDEO_NONE;
685 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
686 /* 570 */
687 video_supported = IBMACPI_VIDEO_570;
688 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
689 /* 600e/x, 770e, 770x */
690 video_supported = IBMACPI_VIDEO_770;
691 else
692 /* all others */
693 video_supported = IBMACPI_VIDEO_NEW;
694
695 return 0;
696 }
697
698 static int video_status(void)
699 {
700 int status = 0;
701 int i;
702
703 if (video_supported == IBMACPI_VIDEO_570) {
704 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
705 status = i & 3;
706 } else if (video_supported == IBMACPI_VIDEO_770) {
707 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
708 status |= 0x01 * i;
709 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
710 status |= 0x02 * i;
711 } else if (video_supported == IBMACPI_VIDEO_NEW) {
712 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
713 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
714 status |= 0x02 * i;
715
716 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
717 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
718 status |= 0x01 * i;
719 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
720 status |= 0x08 * i;
721 }
722
723 return status;
724 }
725
726 static int video_autosw(void)
727 {
728 int autosw = 0;
729
730 if (video_supported == IBMACPI_VIDEO_570)
731 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
732 else if (video_supported == IBMACPI_VIDEO_770 ||
733 video_supported == IBMACPI_VIDEO_NEW)
734 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
735
736 return autosw & 1;
737 }
738
739 static int video_read(char *p)
740 {
741 int status = video_status();
742 int autosw = video_autosw();
743 int len = 0;
744
745 if (!video_supported) {
746 len += sprintf(p + len, "status:\t\tnot supported\n");
747 return len;
748 }
749
750 len += sprintf(p + len, "status:\t\tsupported\n");
751 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
752 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
753 if (video_supported == IBMACPI_VIDEO_NEW)
754 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
755 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
756 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
757 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
758 if (video_supported == IBMACPI_VIDEO_NEW)
759 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
760 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
761 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
762
763 return len;
764 }
765
766 static int video_switch(void)
767 {
768 int autosw = video_autosw();
769 int ret;
770
771 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
772 return -EIO;
773 ret = video_supported == IBMACPI_VIDEO_570 ?
774 acpi_evalf(ec_handle, NULL, "_Q16", "v") :
775 acpi_evalf(vid_handle, NULL, "VSWT", "v");
776 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
777
778 return ret;
779 }
780
781 static int video_expand(void)
782 {
783 if (video_supported == IBMACPI_VIDEO_570)
784 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
785 else if (video_supported == IBMACPI_VIDEO_770)
786 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
787 else
788 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
789 }
790
791 static int video_switch2(int status)
792 {
793 int ret;
794
795 if (video_supported == IBMACPI_VIDEO_570) {
796 ret = acpi_evalf(NULL, NULL,
797 "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
798 } else if (video_supported == IBMACPI_VIDEO_770) {
799 int autosw = video_autosw();
800 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
801 return -EIO;
802
803 ret = acpi_evalf(vid_handle, NULL,
804 "ASWT", "vdd", status * 0x100, 0);
805
806 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
807 } else {
808 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
809 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
810 }
811
812 return ret;
813 }
814
815 static int video_write(char *buf)
816 {
817 char *cmd;
818 int enable, disable, status;
819
820 if (!video_supported)
821 return -ENODEV;
822
823 enable = disable = 0;
824
825 while ((cmd = next_cmd(&buf))) {
826 if (strlencmp(cmd, "lcd_enable") == 0) {
827 enable |= 0x01;
828 } else if (strlencmp(cmd, "lcd_disable") == 0) {
829 disable |= 0x01;
830 } else if (strlencmp(cmd, "crt_enable") == 0) {
831 enable |= 0x02;
832 } else if (strlencmp(cmd, "crt_disable") == 0) {
833 disable |= 0x02;
834 } else if (video_supported == IBMACPI_VIDEO_NEW &&
835 strlencmp(cmd, "dvi_enable") == 0) {
836 enable |= 0x08;
837 } else if (video_supported == IBMACPI_VIDEO_NEW &&
838 strlencmp(cmd, "dvi_disable") == 0) {
839 disable |= 0x08;
840 } else if (strlencmp(cmd, "auto_enable") == 0) {
841 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
842 return -EIO;
843 } else if (strlencmp(cmd, "auto_disable") == 0) {
844 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
845 return -EIO;
846 } else if (strlencmp(cmd, "video_switch") == 0) {
847 if (!video_switch())
848 return -EIO;
849 } else if (strlencmp(cmd, "expand_toggle") == 0) {
850 if (!video_expand())
851 return -EIO;
852 } else
853 return -EINVAL;
854 }
855
856 if (enable || disable) {
857 status = (video_status() & 0x0f & ~disable) | enable;
858 if (!video_switch2(status))
859 return -EIO;
860 }
861
862 return 0;
863 }
864
865 static void video_exit(void)
866 {
867 acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
868 }
869
870 static int light_supported;
871 static int light_status_supported;
872
873 static int light_init(void)
874 {
875 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
876 light_supported = (cmos_handle || lght_handle) && !ledb_handle;
877
878 if (light_supported)
879 /* light status not supported on
880 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
881 light_status_supported = acpi_evalf(ec_handle, NULL,
882 "KBLT", "qv");
883
884 return 0;
885 }
886
887 static int light_read(char *p)
888 {
889 int len = 0;
890 int status = 0;
891
892 if (!light_supported) {
893 len += sprintf(p + len, "status:\t\tnot supported\n");
894 } else if (!light_status_supported) {
895 len += sprintf(p + len, "status:\t\tunknown\n");
896 len += sprintf(p + len, "commands:\ton, off\n");
897 } else {
898 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
899 return -EIO;
900 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
901 len += sprintf(p + len, "commands:\ton, off\n");
902 }
903
904 return len;
905 }
906
907 static int light_write(char *buf)
908 {
909 int cmos_cmd, lght_cmd;
910 char *cmd;
911 int success;
912
913 if (!light_supported)
914 return -ENODEV;
915
916 while ((cmd = next_cmd(&buf))) {
917 if (strlencmp(cmd, "on") == 0) {
918 cmos_cmd = 0x0c;
919 lght_cmd = 1;
920 } else if (strlencmp(cmd, "off") == 0) {
921 cmos_cmd = 0x0d;
922 lght_cmd = 0;
923 } else
924 return -EINVAL;
925
926 success = cmos_handle ?
927 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
928 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
929 if (!success)
930 return -EIO;
931 }
932
933 return 0;
934 }
935
936 #if defined(CONFIG_ACPI_IBM_DOCK) || defined(CONFIG_ACPI_IBM_BAY)
937 static int _sta(acpi_handle handle)
938 {
939 int status;
940
941 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
942 status = 0;
943
944 return status;
945 }
946 #endif
947
948 #ifdef CONFIG_ACPI_IBM_DOCK
949 #define dock_docked() (_sta(dock_handle) & 1)
950
951 static int dock_read(char *p)
952 {
953 int len = 0;
954 int docked = dock_docked();
955
956 if (!dock_handle)
957 len += sprintf(p + len, "status:\t\tnot supported\n");
958 else if (!docked)
959 len += sprintf(p + len, "status:\t\tundocked\n");
960 else {
961 len += sprintf(p + len, "status:\t\tdocked\n");
962 len += sprintf(p + len, "commands:\tdock, undock\n");
963 }
964
965 return len;
966 }
967
968 static int dock_write(char *buf)
969 {
970 char *cmd;
971
972 if (!dock_docked())
973 return -ENODEV;
974
975 while ((cmd = next_cmd(&buf))) {
976 if (strlencmp(cmd, "undock") == 0) {
977 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
978 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
979 return -EIO;
980 } else if (strlencmp(cmd, "dock") == 0) {
981 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
982 return -EIO;
983 } else
984 return -EINVAL;
985 }
986
987 return 0;
988 }
989
990 static void dock_notify(struct ibm_struct *ibm, u32 event)
991 {
992 int docked = dock_docked();
993 int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
994
995 if (event == 1 && !pci) /* 570 */
996 acpi_bus_generate_event(ibm->device, event, 1); /* button */
997 else if (event == 1 && pci) /* 570 */
998 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
999 else if (event == 3 && docked)
1000 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1001 else if (event == 3 && !docked)
1002 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1003 else if (event == 0 && docked)
1004 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1005 else {
1006 printk(IBM_ERR "unknown dock event %d, status %d\n",
1007 event, _sta(dock_handle));
1008 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1009 }
1010 }
1011 #endif
1012
1013 #ifdef CONFIG_ACPI_IBM_BAY
1014 static int bay_status_supported;
1015 static int bay_status2_supported;
1016 static int bay_eject_supported;
1017 static int bay_eject2_supported;
1018
1019 static int bay_init(void)
1020 {
1021 bay_status_supported = bay_handle &&
1022 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1023 bay_status2_supported = bay2_handle &&
1024 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1025
1026 bay_eject_supported = bay_handle && bay_ej_handle &&
1027 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1028 bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1029 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1030
1031 return 0;
1032 }
1033
1034 #define bay_occupied(b) (_sta(b##_handle) & 1)
1035
1036 static int bay_read(char *p)
1037 {
1038 int len = 0;
1039 int occupied = bay_occupied(bay);
1040 int occupied2 = bay_occupied(bay2);
1041 int eject, eject2;
1042
1043 len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1044 (occupied ? "occupied" : "unoccupied") :
1045 "not supported");
1046 if (bay_status2_supported)
1047 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1048 "occupied" : "unoccupied");
1049
1050 eject = bay_eject_supported && occupied;
1051 eject2 = bay_eject2_supported && occupied2;
1052
1053 if (eject && eject2)
1054 len += sprintf(p + len, "commands:\teject, eject2\n");
1055 else if (eject)
1056 len += sprintf(p + len, "commands:\teject\n");
1057 else if (eject2)
1058 len += sprintf(p + len, "commands:\teject2\n");
1059
1060 return len;
1061 }
1062
1063 static int bay_write(char *buf)
1064 {
1065 char *cmd;
1066
1067 if (!bay_eject_supported && !bay_eject2_supported)
1068 return -ENODEV;
1069
1070 while ((cmd = next_cmd(&buf))) {
1071 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1072 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1073 return -EIO;
1074 } else if (bay_eject2_supported &&
1075 strlencmp(cmd, "eject2") == 0) {
1076 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1077 return -EIO;
1078 } else
1079 return -EINVAL;
1080 }
1081
1082 return 0;
1083 }
1084
1085 static void bay_notify(struct ibm_struct *ibm, u32 event)
1086 {
1087 acpi_bus_generate_event(ibm->device, event, 0);
1088 }
1089 #endif /* CONFIG_ACPI_IBM_BAY */
1090
1091 static int cmos_read(char *p)
1092 {
1093 int len = 0;
1094
1095 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1096 R30, R31, T20-22, X20-21 */
1097 if (!cmos_handle)
1098 len += sprintf(p + len, "status:\t\tnot supported\n");
1099 else {
1100 len += sprintf(p + len, "status:\t\tsupported\n");
1101 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1102 }
1103
1104 return len;
1105 }
1106
1107 static int cmos_eval(int cmos_cmd)
1108 {
1109 if (cmos_handle)
1110 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1111 else
1112 return 1;
1113 }
1114
1115 static int cmos_write(char *buf)
1116 {
1117 char *cmd;
1118 int cmos_cmd;
1119
1120 if (!cmos_handle)
1121 return -EINVAL;
1122
1123 while ((cmd = next_cmd(&buf))) {
1124 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1125 cmos_cmd >= 0 && cmos_cmd <= 21) {
1126 /* cmos_cmd set */
1127 } else
1128 return -EINVAL;
1129
1130 if (!cmos_eval(cmos_cmd))
1131 return -EIO;
1132 }
1133
1134 return 0;
1135 }
1136
1137 static enum led_access_mode led_supported;
1138
1139 static int led_init(void)
1140 {
1141 if (!led_handle)
1142 /* led not supported on R30, R31 */
1143 led_supported = IBMACPI_LED_NONE;
1144 else if (strlencmp(led_path, "SLED") == 0)
1145 /* 570 */
1146 led_supported = IBMACPI_LED_570;
1147 else if (strlencmp(led_path, "SYSL") == 0)
1148 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1149 led_supported = IBMACPI_LED_OLD;
1150 else
1151 /* all others */
1152 led_supported = IBMACPI_LED_NEW;
1153
1154 return 0;
1155 }
1156
1157 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1158
1159 static int led_read(char *p)
1160 {
1161 int len = 0;
1162
1163 if (!led_supported) {
1164 len += sprintf(p + len, "status:\t\tnot supported\n");
1165 return len;
1166 }
1167 len += sprintf(p + len, "status:\t\tsupported\n");
1168
1169 if (led_supported == IBMACPI_LED_570) {
1170 /* 570 */
1171 int i, status;
1172 for (i = 0; i < 8; i++) {
1173 if (!acpi_evalf(ec_handle,
1174 &status, "GLED", "dd", 1 << i))
1175 return -EIO;
1176 len += sprintf(p + len, "%d:\t\t%s\n",
1177 i, led_status(status));
1178 }
1179 }
1180
1181 len += sprintf(p + len, "commands:\t"
1182 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1183
1184 return len;
1185 }
1186
1187 /* off, on, blink */
1188 static const int led_sled_arg1[] = { 0, 1, 3 };
1189 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1190 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1191 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1192
1193 static int led_write(char *buf)
1194 {
1195 char *cmd;
1196 int led, ind, ret;
1197
1198 if (!led_supported)
1199 return -ENODEV;
1200
1201 while ((cmd = next_cmd(&buf))) {
1202 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1203 return -EINVAL;
1204
1205 if (strstr(cmd, "off")) {
1206 ind = 0;
1207 } else if (strstr(cmd, "on")) {
1208 ind = 1;
1209 } else if (strstr(cmd, "blink")) {
1210 ind = 2;
1211 } else
1212 return -EINVAL;
1213
1214 if (led_supported == IBMACPI_LED_570) {
1215 /* 570 */
1216 led = 1 << led;
1217 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1218 led, led_sled_arg1[ind]))
1219 return -EIO;
1220 } else if (led_supported == IBMACPI_LED_OLD) {
1221 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1222 led = 1 << led;
1223 ret = ec_write(IBMACPI_LED_EC_HLMS, led);
1224 if (ret >= 0)
1225 ret =
1226 ec_write(IBMACPI_LED_EC_HLBL,
1227 led * led_exp_hlbl[ind]);
1228 if (ret >= 0)
1229 ret =
1230 ec_write(IBMACPI_LED_EC_HLCL,
1231 led * led_exp_hlcl[ind]);
1232 if (ret < 0)
1233 return ret;
1234 } else {
1235 /* all others */
1236 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1237 led, led_led_arg1[ind]))
1238 return -EIO;
1239 }
1240 }
1241
1242 return 0;
1243 }
1244
1245 static int beep_read(char *p)
1246 {
1247 int len = 0;
1248
1249 if (!beep_handle)
1250 len += sprintf(p + len, "status:\t\tnot supported\n");
1251 else {
1252 len += sprintf(p + len, "status:\t\tsupported\n");
1253 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1254 }
1255
1256 return len;
1257 }
1258
1259 static int beep_write(char *buf)
1260 {
1261 char *cmd;
1262 int beep_cmd;
1263
1264 if (!beep_handle)
1265 return -ENODEV;
1266
1267 while ((cmd = next_cmd(&buf))) {
1268 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1269 beep_cmd >= 0 && beep_cmd <= 17) {
1270 /* beep_cmd set */
1271 } else
1272 return -EINVAL;
1273 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1274 return -EIO;
1275 }
1276
1277 return 0;
1278 }
1279
1280 static int acpi_ec_read(int i, u8 * p)
1281 {
1282 int v;
1283
1284 if (ecrd_handle) {
1285 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1286 return 0;
1287 *p = v;
1288 } else {
1289 if (ec_read(i, p) < 0)
1290 return 0;
1291 }
1292
1293 return 1;
1294 }
1295
1296 static int acpi_ec_write(int i, u8 v)
1297 {
1298 if (ecwr_handle) {
1299 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1300 return 0;
1301 } else {
1302 if (ec_write(i, v) < 0)
1303 return 0;
1304 }
1305
1306 return 1;
1307 }
1308
1309 static enum thermal_access_mode thermal_read_mode;
1310
1311 static int thermal_init(void)
1312 {
1313 u8 t, ta1, ta2;
1314 int i;
1315 int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1316
1317 if (ibm_thinkpad_ec_found && experimental) {
1318 /*
1319 * Direct EC access mode: sensors at registers
1320 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1321 * non-implemented, thermal sensors return 0x80 when
1322 * not available
1323 */
1324
1325 ta1 = ta2 = 0;
1326 for (i = 0; i < 8; i++) {
1327 if (likely(acpi_ec_read(0x78 + i, &t))) {
1328 ta1 |= t;
1329 } else {
1330 ta1 = 0;
1331 break;
1332 }
1333 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1334 ta2 |= t;
1335 } else {
1336 ta1 = 0;
1337 break;
1338 }
1339 }
1340 if (ta1 == 0) {
1341 /* This is sheer paranoia, but we handle it anyway */
1342 if (acpi_tmp7) {
1343 printk(IBM_ERR
1344 "ThinkPad ACPI EC access misbehaving, "
1345 "falling back to ACPI TMPx access mode\n");
1346 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1347 } else {
1348 printk(IBM_ERR
1349 "ThinkPad ACPI EC access misbehaving, "
1350 "disabling thermal sensors access\n");
1351 thermal_read_mode = IBMACPI_THERMAL_NONE;
1352 }
1353 } else {
1354 thermal_read_mode =
1355 (ta2 != 0) ?
1356 IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
1357 }
1358 } else if (acpi_tmp7) {
1359 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1360 /* 600e/x, 770e, 770x */
1361 thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
1362 } else {
1363 /* Standard ACPI TMPx access, max 8 sensors */
1364 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1365 }
1366 } else {
1367 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1368 thermal_read_mode = IBMACPI_THERMAL_NONE;
1369 }
1370
1371 return 0;
1372 }
1373
1374 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1375 {
1376 int i, t;
1377 s8 tmp;
1378 char tmpi[] = "TMPi";
1379
1380 if (!s)
1381 return -EINVAL;
1382
1383 switch (thermal_read_mode) {
1384 #if IBMACPI_MAX_THERMAL_SENSORS >= 16
1385 case IBMACPI_THERMAL_TPEC_16:
1386 for (i = 0; i < 8; i++) {
1387 if (!acpi_ec_read(0xC0 + i, &tmp))
1388 return -EIO;
1389 s->temp[i + 8] = tmp * 1000;
1390 }
1391 /* fallthrough */
1392 #endif
1393 case IBMACPI_THERMAL_TPEC_8:
1394 for (i = 0; i < 8; i++) {
1395 if (!acpi_ec_read(0x78 + i, &tmp))
1396 return -EIO;
1397 s->temp[i] = tmp * 1000;
1398 }
1399 return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
1400
1401 case IBMACPI_THERMAL_ACPI_UPDT:
1402 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1403 return -EIO;
1404 for (i = 0; i < 8; i++) {
1405 tmpi[3] = '0' + i;
1406 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1407 return -EIO;
1408 s->temp[i] = (t - 2732) * 100;
1409 }
1410 return 8;
1411
1412 case IBMACPI_THERMAL_ACPI_TMP07:
1413 for (i = 0; i < 8; i++) {
1414 tmpi[3] = '0' + i;
1415 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1416 return -EIO;
1417 s->temp[i] = t * 1000;
1418 }
1419 return 8;
1420
1421 case IBMACPI_THERMAL_NONE:
1422 default:
1423 return 0;
1424 }
1425 }
1426
1427 static int thermal_read(char *p)
1428 {
1429 int len = 0;
1430 int n, i;
1431 struct ibm_thermal_sensors_struct t;
1432
1433 n = thermal_get_sensors(&t);
1434 if (unlikely(n < 0))
1435 return n;
1436
1437 len += sprintf(p + len, "temperatures:\t");
1438
1439 if (n > 0) {
1440 for (i = 0; i < (n - 1); i++)
1441 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1442 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1443 } else
1444 len += sprintf(p + len, "not supported\n");
1445
1446 return len;
1447 }
1448
1449 static u8 ecdump_regs[256];
1450
1451 static int ecdump_read(char *p)
1452 {
1453 int len = 0;
1454 int i, j;
1455 u8 v;
1456
1457 len += sprintf(p + len, "EC "
1458 " +00 +01 +02 +03 +04 +05 +06 +07"
1459 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1460 for (i = 0; i < 256; i += 16) {
1461 len += sprintf(p + len, "EC 0x%02x:", i);
1462 for (j = 0; j < 16; j++) {
1463 if (!acpi_ec_read(i + j, &v))
1464 break;
1465 if (v != ecdump_regs[i + j])
1466 len += sprintf(p + len, " *%02x", v);
1467 else
1468 len += sprintf(p + len, " %02x", v);
1469 ecdump_regs[i + j] = v;
1470 }
1471 len += sprintf(p + len, "\n");
1472 if (j != 16)
1473 break;
1474 }
1475
1476 /* These are way too dangerous to advertise openly... */
1477 #if 0
1478 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1479 " (<offset> is 00-ff, <value> is 00-ff)\n");
1480 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1481 " (<offset> is 00-ff, <value> is 0-255)\n");
1482 #endif
1483 return len;
1484 }
1485
1486 static int ecdump_write(char *buf)
1487 {
1488 char *cmd;
1489 int i, v;
1490
1491 while ((cmd = next_cmd(&buf))) {
1492 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1493 /* i and v set */
1494 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1495 /* i and v set */
1496 } else
1497 return -EINVAL;
1498 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1499 if (!acpi_ec_write(i, v))
1500 return -EIO;
1501 } else
1502 return -EINVAL;
1503 }
1504
1505 return 0;
1506 }
1507
1508 static int brightness_get(struct backlight_device *bd)
1509 {
1510 u8 level;
1511 if (!acpi_ec_read(brightness_offset, &level))
1512 return -EIO;
1513
1514 level &= 0x7;
1515
1516 return level;
1517 }
1518
1519 static int brightness_read(char *p)
1520 {
1521 int len = 0;
1522 int level;
1523
1524 if ((level = brightness_get(NULL)) < 0) {
1525 len += sprintf(p + len, "level:\t\tunreadable\n");
1526 } else {
1527 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1528 len += sprintf(p + len, "commands:\tup, down\n");
1529 len += sprintf(p + len, "commands:\tlevel <level>"
1530 " (<level> is 0-7)\n");
1531 }
1532
1533 return len;
1534 }
1535
1536 static int brightness_set(int value)
1537 {
1538 int cmos_cmd, inc, i;
1539 int current_value = brightness_get(NULL);
1540
1541 value &= 7;
1542
1543 cmos_cmd = value > current_value ?
1544 TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
1545 inc = value > current_value ? 1 : -1;
1546 for (i = current_value; i != value; i += inc) {
1547 if (!cmos_eval(cmos_cmd))
1548 return -EIO;
1549 if (!acpi_ec_write(brightness_offset, i + inc))
1550 return -EIO;
1551 }
1552
1553 return 0;
1554 }
1555
1556 static int brightness_write(char *buf)
1557 {
1558 int level;
1559 int new_level;
1560 char *cmd;
1561
1562 while ((cmd = next_cmd(&buf))) {
1563 if ((level = brightness_get(NULL)) < 0)
1564 return level;
1565 level &= 7;
1566
1567 if (strlencmp(cmd, "up") == 0) {
1568 new_level = level == 7 ? 7 : level + 1;
1569 } else if (strlencmp(cmd, "down") == 0) {
1570 new_level = level == 0 ? 0 : level - 1;
1571 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1572 new_level >= 0 && new_level <= 7) {
1573 /* new_level set */
1574 } else
1575 return -EINVAL;
1576
1577 brightness_set(new_level);
1578 }
1579
1580 return 0;
1581 }
1582
1583 static int brightness_update_status(struct backlight_device *bd)
1584 {
1585 return brightness_set(
1586 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
1587 bd->props.power == FB_BLANK_UNBLANK) ?
1588 bd->props.brightness : 0);
1589 }
1590
1591 static struct backlight_ops ibm_backlight_data = {
1592 .get_brightness = brightness_get,
1593 .update_status = brightness_update_status,
1594 };
1595
1596 static int brightness_init(void)
1597 {
1598 int b;
1599
1600 b = brightness_get(NULL);
1601 if (b < 0)
1602 return b;
1603
1604 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1605 &ibm_backlight_data);
1606 if (IS_ERR(ibm_backlight_device)) {
1607 printk(IBM_ERR "Could not register backlight device\n");
1608 return PTR_ERR(ibm_backlight_device);
1609 }
1610
1611 ibm_backlight_device->props.max_brightness = 7;
1612 ibm_backlight_device->props.brightness = b;
1613 backlight_update_status(ibm_backlight_device);
1614
1615 return 0;
1616 }
1617
1618 static void brightness_exit(void)
1619 {
1620 if (ibm_backlight_device) {
1621 backlight_device_unregister(ibm_backlight_device);
1622 ibm_backlight_device = NULL;
1623 }
1624 }
1625
1626 static int volume_read(char *p)
1627 {
1628 int len = 0;
1629 u8 level;
1630
1631 if (!acpi_ec_read(volume_offset, &level)) {
1632 len += sprintf(p + len, "level:\t\tunreadable\n");
1633 } else {
1634 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1635 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1636 len += sprintf(p + len, "commands:\tup, down, mute\n");
1637 len += sprintf(p + len, "commands:\tlevel <level>"
1638 " (<level> is 0-15)\n");
1639 }
1640
1641 return len;
1642 }
1643
1644 static int volume_write(char *buf)
1645 {
1646 int cmos_cmd, inc, i;
1647 u8 level, mute;
1648 int new_level, new_mute;
1649 char *cmd;
1650
1651 while ((cmd = next_cmd(&buf))) {
1652 if (!acpi_ec_read(volume_offset, &level))
1653 return -EIO;
1654 new_mute = mute = level & 0x40;
1655 new_level = level = level & 0xf;
1656
1657 if (strlencmp(cmd, "up") == 0) {
1658 if (mute)
1659 new_mute = 0;
1660 else
1661 new_level = level == 15 ? 15 : level + 1;
1662 } else if (strlencmp(cmd, "down") == 0) {
1663 if (mute)
1664 new_mute = 0;
1665 else
1666 new_level = level == 0 ? 0 : level - 1;
1667 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1668 new_level >= 0 && new_level <= 15) {
1669 /* new_level set */
1670 } else if (strlencmp(cmd, "mute") == 0) {
1671 new_mute = 0x40;
1672 } else
1673 return -EINVAL;
1674
1675 if (new_level != level) { /* mute doesn't change */
1676 cmos_cmd = new_level > level ?
1677 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
1678 inc = new_level > level ? 1 : -1;
1679
1680 if (mute && (!cmos_eval(cmos_cmd) ||
1681 !acpi_ec_write(volume_offset, level)))
1682 return -EIO;
1683
1684 for (i = level; i != new_level; i += inc)
1685 if (!cmos_eval(cmos_cmd) ||
1686 !acpi_ec_write(volume_offset, i + inc))
1687 return -EIO;
1688
1689 if (mute && (!cmos_eval(TP_CMOS_VOLUME_MUTE) ||
1690 !acpi_ec_write(volume_offset,
1691 new_level + mute)))
1692 return -EIO;
1693 }
1694
1695 if (new_mute != mute) { /* level doesn't change */
1696 cmos_cmd = new_mute ?
1697 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
1698
1699 if (!cmos_eval(cmos_cmd) ||
1700 !acpi_ec_write(volume_offset, level + new_mute))
1701 return -EIO;
1702 }
1703 }
1704
1705 return 0;
1706 }
1707
1708 static enum fan_status_access_mode fan_status_access_mode;
1709 static enum fan_control_access_mode fan_control_access_mode;
1710 static enum fan_control_commands fan_control_commands;
1711
1712 static int fan_control_status_known;
1713 static u8 fan_control_initial_status;
1714
1715 static void fan_watchdog_fire(struct work_struct *ignored);
1716 static int fan_watchdog_maxinterval;
1717 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
1718
1719 static int fan_init(void)
1720 {
1721 fan_status_access_mode = IBMACPI_FAN_NONE;
1722 fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1723 fan_control_commands = 0;
1724 fan_control_status_known = 1;
1725 fan_watchdog_maxinterval = 0;
1726
1727 if (gfan_handle) {
1728 /* 570, 600e/x, 770e, 770x */
1729 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1730 } else {
1731 /* all other ThinkPads: note that even old-style
1732 * ThinkPad ECs supports the fan control register */
1733 if (likely(acpi_ec_read(fan_status_offset,
1734 &fan_control_initial_status))) {
1735 fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1736
1737 /* In some ThinkPads, neither the EC nor the ACPI
1738 * DSDT initialize the fan status, and it ends up
1739 * being set to 0x07 when it *could* be either
1740 * 0x07 or 0x80.
1741 *
1742 * Enable for TP-1Y (T43), TP-78 (R51e),
1743 * TP-76 (R52), TP-70 (T43, R52), which are known
1744 * to be buggy. */
1745 if (fan_control_initial_status == 0x07 &&
1746 ibm_thinkpad_ec_found &&
1747 ((ibm_thinkpad_ec_found[0] == '1' &&
1748 ibm_thinkpad_ec_found[1] == 'Y') ||
1749 (ibm_thinkpad_ec_found[0] == '7' &&
1750 (ibm_thinkpad_ec_found[1] == '6' ||
1751 ibm_thinkpad_ec_found[1] == '8' ||
1752 ibm_thinkpad_ec_found[1] == '0'))
1753 )) {
1754 printk(IBM_NOTICE
1755 "fan_init: initial fan status is "
1756 "unknown, assuming it is in auto "
1757 "mode\n");
1758 fan_control_status_known = 0;
1759 }
1760 } else {
1761 printk(IBM_ERR
1762 "ThinkPad ACPI EC access misbehaving, "
1763 "fan status and control unavailable\n");
1764 return 0;
1765 }
1766 }
1767
1768 if (sfan_handle) {
1769 /* 570, 770x-JL */
1770 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
1771 fan_control_commands |=
1772 IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
1773 } else {
1774 if (!gfan_handle) {
1775 /* gfan without sfan means no fan control */
1776 /* all other models implement TP EC 0x2f control */
1777
1778 if (fans_handle) {
1779 /* X31, X40, X41 */
1780 fan_control_access_mode =
1781 IBMACPI_FAN_WR_ACPI_FANS;
1782 fan_control_commands |=
1783 IBMACPI_FAN_CMD_SPEED |
1784 IBMACPI_FAN_CMD_LEVEL |
1785 IBMACPI_FAN_CMD_ENABLE;
1786 } else {
1787 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
1788 fan_control_commands |=
1789 IBMACPI_FAN_CMD_LEVEL |
1790 IBMACPI_FAN_CMD_ENABLE;
1791 }
1792 }
1793 }
1794
1795 return 0;
1796 }
1797
1798 static int fan_get_status(u8 *status)
1799 {
1800 u8 s;
1801
1802 /* TODO:
1803 * Add IBMACPI_FAN_RD_ACPI_FANS ? */
1804
1805 switch (fan_status_access_mode) {
1806 case IBMACPI_FAN_RD_ACPI_GFAN:
1807 /* 570, 600e/x, 770e, 770x */
1808
1809 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1810 return -EIO;
1811
1812 if (likely(status))
1813 *status = s & 0x07;
1814
1815 break;
1816
1817 case IBMACPI_FAN_RD_TPEC:
1818 /* all except 570, 600e/x, 770e, 770x */
1819 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
1820 return -EIO;
1821
1822 if (likely(status))
1823 *status = s;
1824
1825 break;
1826
1827 default:
1828 return -ENXIO;
1829 }
1830
1831 return 0;
1832 }
1833
1834 static int fan_get_speed(unsigned int *speed)
1835 {
1836 u8 hi, lo;
1837
1838 switch (fan_status_access_mode) {
1839 case IBMACPI_FAN_RD_TPEC:
1840 /* all except 570, 600e/x, 770e, 770x */
1841 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
1842 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
1843 return -EIO;
1844
1845 if (likely(speed))
1846 *speed = (hi << 8) | lo;
1847
1848 break;
1849
1850 default:
1851 return -ENXIO;
1852 }
1853
1854 return 0;
1855 }
1856
1857 static void fan_exit(void)
1858 {
1859 cancel_delayed_work(&fan_watchdog_task);
1860 flush_scheduled_work();
1861 }
1862
1863 static void fan_watchdog_reset(void)
1864 {
1865 static int fan_watchdog_active = 0;
1866
1867 if (fan_watchdog_active)
1868 cancel_delayed_work(&fan_watchdog_task);
1869
1870 if (fan_watchdog_maxinterval > 0) {
1871 fan_watchdog_active = 1;
1872 if (!schedule_delayed_work(&fan_watchdog_task,
1873 msecs_to_jiffies(fan_watchdog_maxinterval
1874 * 1000))) {
1875 printk(IBM_ERR "failed to schedule the fan watchdog, "
1876 "watchdog will not trigger\n");
1877 }
1878 } else
1879 fan_watchdog_active = 0;
1880 }
1881
1882 static int fan_read(char *p)
1883 {
1884 int len = 0;
1885 int rc;
1886 u8 status;
1887 unsigned int speed = 0;
1888
1889 switch (fan_status_access_mode) {
1890 case IBMACPI_FAN_RD_ACPI_GFAN:
1891 /* 570, 600e/x, 770e, 770x */
1892 if ((rc = fan_get_status(&status)) < 0)
1893 return rc;
1894
1895 len += sprintf(p + len, "status:\t\t%s\n"
1896 "level:\t\t%d\n",
1897 (status != 0) ? "enabled" : "disabled", status);
1898 break;
1899
1900 case IBMACPI_FAN_RD_TPEC:
1901 /* all except 570, 600e/x, 770e, 770x */
1902 if ((rc = fan_get_status(&status)) < 0)
1903 return rc;
1904
1905 if (unlikely(!fan_control_status_known)) {
1906 if (status != fan_control_initial_status)
1907 fan_control_status_known = 1;
1908 else
1909 /* Return most likely status. In fact, it
1910 * might be the only possible status */
1911 status = IBMACPI_FAN_EC_AUTO;
1912 }
1913
1914 len += sprintf(p + len, "status:\t\t%s\n",
1915 (status != 0) ? "enabled" : "disabled");
1916
1917 /* No ThinkPad boots on disengaged mode, we can safely
1918 * assume the tachometer is online if fan control status
1919 * was unknown */
1920 if ((rc = fan_get_speed(&speed)) < 0)
1921 return rc;
1922
1923 len += sprintf(p + len, "speed:\t\t%d\n", speed);
1924
1925 if (status & IBMACPI_FAN_EC_DISENGAGED)
1926 /* Disengaged mode takes precedence */
1927 len += sprintf(p + len, "level:\t\tdisengaged\n");
1928 else if (status & IBMACPI_FAN_EC_AUTO)
1929 len += sprintf(p + len, "level:\t\tauto\n");
1930 else
1931 len += sprintf(p + len, "level:\t\t%d\n", status);
1932 break;
1933
1934 case IBMACPI_FAN_NONE:
1935 default:
1936 len += sprintf(p + len, "status:\t\tnot supported\n");
1937 }
1938
1939 if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
1940 len += sprintf(p + len, "commands:\tlevel <level>");
1941
1942 switch (fan_control_access_mode) {
1943 case IBMACPI_FAN_WR_ACPI_SFAN:
1944 len += sprintf(p + len, " (<level> is 0-7)\n");
1945 break;
1946
1947 default:
1948 len += sprintf(p + len, " (<level> is 0-7, "
1949 "auto, disengaged)\n");
1950 break;
1951 }
1952 }
1953
1954 if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
1955 len += sprintf(p + len, "commands:\tenable, disable\n"
1956 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
1957 "1-120 (seconds))\n");
1958
1959 if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
1960 len += sprintf(p + len, "commands:\tspeed <speed>"
1961 " (<speed> is 0-65535)\n");
1962
1963 return len;
1964 }
1965
1966 static int fan_set_level(int level)
1967 {
1968 switch (fan_control_access_mode) {
1969 case IBMACPI_FAN_WR_ACPI_SFAN:
1970 if (level >= 0 && level <= 7) {
1971 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
1972 return -EIO;
1973 } else
1974 return -EINVAL;
1975 break;
1976
1977 case IBMACPI_FAN_WR_ACPI_FANS:
1978 case IBMACPI_FAN_WR_TPEC:
1979 if ((level != IBMACPI_FAN_EC_AUTO) &&
1980 (level != IBMACPI_FAN_EC_DISENGAGED) &&
1981 ((level < 0) || (level > 7)))
1982 return -EINVAL;
1983
1984 if (!acpi_ec_write(fan_status_offset, level))
1985 return -EIO;
1986 else
1987 fan_control_status_known = 1;
1988 break;
1989
1990 default:
1991 return -ENXIO;
1992 }
1993 return 0;
1994 }
1995
1996 static int fan_set_enable(void)
1997 {
1998 u8 s;
1999 int rc;
2000
2001 switch (fan_control_access_mode) {
2002 case IBMACPI_FAN_WR_ACPI_FANS:
2003 case IBMACPI_FAN_WR_TPEC:
2004 if ((rc = fan_get_status(&s)) < 0)
2005 return rc;
2006
2007 /* Don't go out of emergency fan mode */
2008 if (s != 7)
2009 s = IBMACPI_FAN_EC_AUTO;
2010
2011 if (!acpi_ec_write(fan_status_offset, s))
2012 return -EIO;
2013 else
2014 fan_control_status_known = 1;
2015 break;
2016
2017 case IBMACPI_FAN_WR_ACPI_SFAN:
2018 if ((rc = fan_get_status(&s)) < 0)
2019 return rc;
2020
2021 s &= 0x07;
2022
2023 /* Set fan to at least level 4 */
2024 if (s < 4)
2025 s = 4;
2026
2027 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2028 return -EIO;
2029 break;
2030
2031 default:
2032 return -ENXIO;
2033 }
2034 return 0;
2035 }
2036
2037 static int fan_set_disable(void)
2038 {
2039 switch (fan_control_access_mode) {
2040 case IBMACPI_FAN_WR_ACPI_FANS:
2041 case IBMACPI_FAN_WR_TPEC:
2042 if (!acpi_ec_write(fan_status_offset, 0x00))
2043 return -EIO;
2044 else
2045 fan_control_status_known = 1;
2046 break;
2047
2048 case IBMACPI_FAN_WR_ACPI_SFAN:
2049 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2050 return -EIO;
2051 break;
2052
2053 default:
2054 return -ENXIO;
2055 }
2056 return 0;
2057 }
2058
2059 static int fan_set_speed(int speed)
2060 {
2061 switch (fan_control_access_mode) {
2062 case IBMACPI_FAN_WR_ACPI_FANS:
2063 if (speed >= 0 && speed <= 65535) {
2064 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2065 speed, speed, speed))
2066 return -EIO;
2067 } else
2068 return -EINVAL;
2069 break;
2070
2071 default:
2072 return -ENXIO;
2073 }
2074 return 0;
2075 }
2076
2077 static int fan_write_cmd_level(const char *cmd, int *rc)
2078 {
2079 int level;
2080
2081 if (strlencmp(cmd, "level auto") == 0)
2082 level = IBMACPI_FAN_EC_AUTO;
2083 else if (strlencmp(cmd, "level disengaged") == 0)
2084 level = IBMACPI_FAN_EC_DISENGAGED;
2085 else if (sscanf(cmd, "level %d", &level) != 1)
2086 return 0;
2087
2088 if ((*rc = fan_set_level(level)) == -ENXIO)
2089 printk(IBM_ERR "level command accepted for unsupported "
2090 "access mode %d", fan_control_access_mode);
2091
2092 return 1;
2093 }
2094
2095 static int fan_write_cmd_enable(const char *cmd, int *rc)
2096 {
2097 if (strlencmp(cmd, "enable") != 0)
2098 return 0;
2099
2100 if ((*rc = fan_set_enable()) == -ENXIO)
2101 printk(IBM_ERR "enable command accepted for unsupported "
2102 "access mode %d", fan_control_access_mode);
2103
2104 return 1;
2105 }
2106
2107 static int fan_write_cmd_disable(const char *cmd, int *rc)
2108 {
2109 if (strlencmp(cmd, "disable") != 0)
2110 return 0;
2111
2112 if ((*rc = fan_set_disable()) == -ENXIO)
2113 printk(IBM_ERR "disable command accepted for unsupported "
2114 "access mode %d", fan_control_access_mode);
2115
2116 return 1;
2117 }
2118
2119 static int fan_write_cmd_speed(const char *cmd, int *rc)
2120 {
2121 int speed;
2122
2123 /* TODO:
2124 * Support speed <low> <medium> <high> ? */
2125
2126 if (sscanf(cmd, "speed %d", &speed) != 1)
2127 return 0;
2128
2129 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2130 printk(IBM_ERR "speed command accepted for unsupported "
2131 "access mode %d", fan_control_access_mode);
2132
2133 return 1;
2134 }
2135
2136 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2137 {
2138 int interval;
2139
2140 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2141 return 0;
2142
2143 if (interval < 0 || interval > 120)
2144 *rc = -EINVAL;
2145 else
2146 fan_watchdog_maxinterval = interval;
2147
2148 return 1;
2149 }
2150
2151 static int fan_write(char *buf)
2152 {
2153 char *cmd;
2154 int rc = 0;
2155
2156 while (!rc && (cmd = next_cmd(&buf))) {
2157 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2158 fan_write_cmd_level(cmd, &rc)) &&
2159 !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2160 (fan_write_cmd_enable(cmd, &rc) ||
2161 fan_write_cmd_disable(cmd, &rc) ||
2162 fan_write_cmd_watchdog(cmd, &rc))) &&
2163 !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2164 fan_write_cmd_speed(cmd, &rc))
2165 )
2166 rc = -EINVAL;
2167 else if (!rc)
2168 fan_watchdog_reset();
2169 }
2170
2171 return rc;
2172 }
2173
2174 static void fan_watchdog_fire(struct work_struct *ignored)
2175 {
2176 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2177 if (fan_set_enable()) {
2178 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2179 /* reschedule for later */
2180 fan_watchdog_reset();
2181 }
2182 }
2183
2184 static struct ibm_struct ibms[] = {
2185 {
2186 .name = "driver",
2187 .init = ibm_acpi_driver_init,
2188 .read = ibm_acpi_driver_read,
2189 },
2190 {
2191 .name = "hotkey",
2192 .hid = IBM_HKEY_HID,
2193 .init = hotkey_init,
2194 .read = hotkey_read,
2195 .write = hotkey_write,
2196 .exit = hotkey_exit,
2197 .notify = hotkey_notify,
2198 .handle = &hkey_handle,
2199 .type = ACPI_DEVICE_NOTIFY,
2200 },
2201 {
2202 .name = "bluetooth",
2203 .init = bluetooth_init,
2204 .read = bluetooth_read,
2205 .write = bluetooth_write,
2206 },
2207 {
2208 .name = "wan",
2209 .init = wan_init,
2210 .read = wan_read,
2211 .write = wan_write,
2212 .experimental = 1,
2213 },
2214 {
2215 .name = "video",
2216 .init = video_init,
2217 .read = video_read,
2218 .write = video_write,
2219 .exit = video_exit,
2220 },
2221 {
2222 .name = "light",
2223 .init = light_init,
2224 .read = light_read,
2225 .write = light_write,
2226 },
2227 #ifdef CONFIG_ACPI_IBM_DOCK
2228 {
2229 .name = "dock",
2230 .read = dock_read,
2231 .write = dock_write,
2232 .notify = dock_notify,
2233 .handle = &dock_handle,
2234 .type = ACPI_SYSTEM_NOTIFY,
2235 },
2236 {
2237 .name = "dock",
2238 .hid = IBM_PCI_HID,
2239 .notify = dock_notify,
2240 .handle = &pci_handle,
2241 .type = ACPI_SYSTEM_NOTIFY,
2242 },
2243 #endif
2244 #ifdef CONFIG_ACPI_IBM_BAY
2245 {
2246 .name = "bay",
2247 .init = bay_init,
2248 .read = bay_read,
2249 .write = bay_write,
2250 .notify = bay_notify,
2251 .handle = &bay_handle,
2252 .type = ACPI_SYSTEM_NOTIFY,
2253 },
2254 #endif /* CONFIG_ACPI_IBM_BAY */
2255 {
2256 .name = "cmos",
2257 .read = cmos_read,
2258 .write = cmos_write,
2259 },
2260 {
2261 .name = "led",
2262 .init = led_init,
2263 .read = led_read,
2264 .write = led_write,
2265 },
2266 {
2267 .name = "beep",
2268 .read = beep_read,
2269 .write = beep_write,
2270 },
2271 {
2272 .name = "thermal",
2273 .init = thermal_init,
2274 .read = thermal_read,
2275 },
2276 {
2277 .name = "ecdump",
2278 .read = ecdump_read,
2279 .write = ecdump_write,
2280 .experimental = 1,
2281 },
2282 {
2283 .name = "brightness",
2284 .read = brightness_read,
2285 .write = brightness_write,
2286 .init = brightness_init,
2287 .exit = brightness_exit,
2288 },
2289 {
2290 .name = "volume",
2291 .read = volume_read,
2292 .write = volume_write,
2293 },
2294 {
2295 .name = "fan",
2296 .read = fan_read,
2297 .write = fan_write,
2298 .init = fan_init,
2299 .exit = fan_exit,
2300 .experimental = 1,
2301 },
2302 };
2303
2304 static int dispatch_read(char *page, char **start, off_t off, int count,
2305 int *eof, void *data)
2306 {
2307 struct ibm_struct *ibm = data;
2308 int len;
2309
2310 if (!ibm || !ibm->read)
2311 return -EINVAL;
2312
2313 len = ibm->read(page);
2314 if (len < 0)
2315 return len;
2316
2317 if (len <= off + count)
2318 *eof = 1;
2319 *start = page + off;
2320 len -= off;
2321 if (len > count)
2322 len = count;
2323 if (len < 0)
2324 len = 0;
2325
2326 return len;
2327 }
2328
2329 static int dispatch_write(struct file *file, const char __user * userbuf,
2330 unsigned long count, void *data)
2331 {
2332 struct ibm_struct *ibm = data;
2333 char *kernbuf;
2334 int ret;
2335
2336 if (!ibm || !ibm->write)
2337 return -EINVAL;
2338
2339 kernbuf = kmalloc(count + 2, GFP_KERNEL);
2340 if (!kernbuf)
2341 return -ENOMEM;
2342
2343 if (copy_from_user(kernbuf, userbuf, count)) {
2344 kfree(kernbuf);
2345 return -EFAULT;
2346 }
2347
2348 kernbuf[count] = 0;
2349 strcat(kernbuf, ",");
2350 ret = ibm->write(kernbuf);
2351 if (ret == 0)
2352 ret = count;
2353
2354 kfree(kernbuf);
2355
2356 return ret;
2357 }
2358
2359 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
2360 {
2361 struct ibm_struct *ibm = data;
2362
2363 if (!ibm || !ibm->notify)
2364 return;
2365
2366 ibm->notify(ibm, event);
2367 }
2368
2369 static int __init setup_notify(struct ibm_struct *ibm)
2370 {
2371 acpi_status status;
2372 int ret;
2373
2374 if (!*ibm->handle)
2375 return 0;
2376
2377 ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
2378 if (ret < 0) {
2379 printk(IBM_ERR "%s device not present\n", ibm->name);
2380 return -ENODEV;
2381 }
2382
2383 acpi_driver_data(ibm->device) = ibm;
2384 sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
2385
2386 status = acpi_install_notify_handler(*ibm->handle, ibm->type,
2387 dispatch_notify, ibm);
2388 if (ACPI_FAILURE(status)) {
2389 if (status == AE_ALREADY_EXISTS) {
2390 printk(IBM_NOTICE "another device driver is already handling %s events\n",
2391 ibm->name);
2392 } else {
2393 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
2394 ibm->name, status);
2395 }
2396 return -ENODEV;
2397 }
2398 ibm->notify_installed = 1;
2399 return 0;
2400 }
2401
2402 static int __init ibm_device_add(struct acpi_device *device)
2403 {
2404 return 0;
2405 }
2406
2407 static int __init register_ibmacpi_subdriver(struct ibm_struct *ibm)
2408 {
2409 int ret;
2410
2411 ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
2412 if (!ibm->driver) {
2413 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
2414 return -1;
2415 }
2416
2417 sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
2418 ibm->driver->ids = ibm->hid;
2419 ibm->driver->ops.add = &ibm_device_add;
2420
2421 ret = acpi_bus_register_driver(ibm->driver);
2422 if (ret < 0) {
2423 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
2424 ibm->hid, ret);
2425 kfree(ibm->driver);
2426 }
2427
2428 return ret;
2429 }
2430
2431 static int __init ibm_init(struct ibm_struct *ibm)
2432 {
2433 int ret;
2434 struct proc_dir_entry *entry;
2435
2436 if (ibm->experimental && !experimental)
2437 return 0;
2438
2439 if (ibm->hid) {
2440 ret = register_ibmacpi_subdriver(ibm);
2441 if (ret < 0)
2442 return ret;
2443 ibm->driver_registered = 1;
2444 }
2445
2446 if (ibm->init) {
2447 ret = ibm->init();
2448 if (ret != 0)
2449 return ret;
2450 ibm->init_called = 1;
2451 }
2452
2453 if (ibm->read) {
2454 entry = create_proc_entry(ibm->name,
2455 S_IFREG | S_IRUGO | S_IWUSR,
2456 proc_dir);
2457 if (!entry) {
2458 printk(IBM_ERR "unable to create proc entry %s\n",
2459 ibm->name);
2460 return -ENODEV;
2461 }
2462 entry->owner = THIS_MODULE;
2463 entry->data = ibm;
2464 entry->read_proc = &dispatch_read;
2465 if (ibm->write)
2466 entry->write_proc = &dispatch_write;
2467 ibm->proc_created = 1;
2468 }
2469
2470 if (ibm->notify) {
2471 ret = setup_notify(ibm);
2472 if (ret == -ENODEV) {
2473 printk(IBM_NOTICE "disabling subdriver %s\n",
2474 ibm->name);
2475 ibm_exit(ibm);
2476 return 0;
2477 }
2478 if (ret < 0)
2479 return ret;
2480 }
2481
2482 return 0;
2483 }
2484
2485 static void ibm_exit(struct ibm_struct *ibm)
2486 {
2487 if (ibm->notify_installed)
2488 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2489 dispatch_notify);
2490
2491 if (ibm->proc_created)
2492 remove_proc_entry(ibm->name, proc_dir);
2493
2494 if (ibm->init_called && ibm->exit)
2495 ibm->exit();
2496
2497 if (ibm->driver_registered) {
2498 acpi_bus_unregister_driver(ibm->driver);
2499 kfree(ibm->driver);
2500 }
2501 }
2502
2503 static void __init ibm_handle_init(char *name,
2504 acpi_handle * handle, acpi_handle parent,
2505 char **paths, int num_paths, char **path)
2506 {
2507 int i;
2508 acpi_status status;
2509
2510 for (i = 0; i < num_paths; i++) {
2511 status = acpi_get_handle(parent, paths[i], handle);
2512 if (ACPI_SUCCESS(status)) {
2513 *path = paths[i];
2514 return;
2515 }
2516 }
2517
2518 *handle = NULL;
2519 }
2520
2521 #define IBM_HANDLE_INIT(object) \
2522 ibm_handle_init(#object, &object##_handle, *object##_parent, \
2523 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
2524
2525 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
2526 {
2527 unsigned int i;
2528
2529 for (i = 0; i < ARRAY_SIZE(ibms); i++)
2530 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2531 if (strlen(val) > sizeof(ibms[i].param) - 2)
2532 return -ENOSPC;
2533 strcpy(ibms[i].param, val);
2534 strcat(ibms[i].param, ",");
2535 return 0;
2536 }
2537
2538 return -EINVAL;
2539 }
2540
2541 #define IBM_PARAM(feature) \
2542 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2543
2544 IBM_PARAM(hotkey);
2545 IBM_PARAM(bluetooth);
2546 IBM_PARAM(video);
2547 IBM_PARAM(light);
2548 #ifdef CONFIG_ACPI_IBM_DOCK
2549 IBM_PARAM(dock);
2550 #endif
2551 #ifdef CONFIG_ACPI_IBM_BAY
2552 IBM_PARAM(bay);
2553 #endif /* CONFIG_ACPI_IBM_BAY */
2554 IBM_PARAM(cmos);
2555 IBM_PARAM(led);
2556 IBM_PARAM(beep);
2557 IBM_PARAM(ecdump);
2558 IBM_PARAM(brightness);
2559 IBM_PARAM(volume);
2560 IBM_PARAM(fan);
2561
2562 static void acpi_ibm_exit(void)
2563 {
2564 int i;
2565
2566 for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2567 ibm_exit(&ibms[i]);
2568
2569 if (proc_dir)
2570 remove_proc_entry(IBM_DIR, acpi_root_dir);
2571
2572 if (ibm_thinkpad_ec_found)
2573 kfree(ibm_thinkpad_ec_found);
2574 }
2575
2576 static char* __init check_dmi_for_ec(void)
2577 {
2578 struct dmi_device *dev = NULL;
2579 char ec_fw_string[18];
2580
2581 /*
2582 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2583 * X32 or newer, all Z series; Some models must have an
2584 * up-to-date BIOS or they will not be detected.
2585 *
2586 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2587 */
2588 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2589 if (sscanf(dev->name,
2590 "IBM ThinkPad Embedded Controller -[%17c",
2591 ec_fw_string) == 1) {
2592 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2593 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2594 return kstrdup(ec_fw_string, GFP_KERNEL);
2595 }
2596 }
2597 return NULL;
2598 }
2599
2600 static int __init acpi_ibm_init(void)
2601 {
2602 int ret, i;
2603
2604 if (acpi_disabled)
2605 return -ENODEV;
2606
2607 /* ec is required because many other handles are relative to it */
2608 IBM_HANDLE_INIT(ec);
2609 if (!ec_handle) {
2610 printk(IBM_ERR "ec object not found\n");
2611 return -ENODEV;
2612 }
2613
2614 /* Models with newer firmware report the EC in DMI */
2615 ibm_thinkpad_ec_found = check_dmi_for_ec();
2616
2617 /* these handles are not required */
2618 IBM_HANDLE_INIT(vid);
2619 IBM_HANDLE_INIT(vid2);
2620 IBM_HANDLE_INIT(ledb);
2621 IBM_HANDLE_INIT(led);
2622 IBM_HANDLE_INIT(hkey);
2623 IBM_HANDLE_INIT(lght);
2624 IBM_HANDLE_INIT(cmos);
2625 #ifdef CONFIG_ACPI_IBM_DOCK
2626 IBM_HANDLE_INIT(dock);
2627 #endif
2628 IBM_HANDLE_INIT(pci);
2629 #ifdef CONFIG_ACPI_IBM_BAY
2630 IBM_HANDLE_INIT(bay);
2631 if (bay_handle)
2632 IBM_HANDLE_INIT(bay_ej);
2633 IBM_HANDLE_INIT(bay2);
2634 if (bay2_handle)
2635 IBM_HANDLE_INIT(bay2_ej);
2636 #endif /* CONFIG_ACPI_IBM_BAY */
2637 IBM_HANDLE_INIT(beep);
2638 IBM_HANDLE_INIT(ecrd);
2639 IBM_HANDLE_INIT(ecwr);
2640 IBM_HANDLE_INIT(fans);
2641 IBM_HANDLE_INIT(gfan);
2642 IBM_HANDLE_INIT(sfan);
2643
2644 proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2645 if (!proc_dir) {
2646 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2647 acpi_ibm_exit();
2648 return -ENODEV;
2649 }
2650 proc_dir->owner = THIS_MODULE;
2651
2652 for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2653 ret = ibm_init(&ibms[i]);
2654 if (ret >= 0 && *ibms[i].param)
2655 ret = ibms[i].write(ibms[i].param);
2656 if (ret < 0) {
2657 acpi_ibm_exit();
2658 return ret;
2659 }
2660 }
2661
2662 return 0;
2663 }
2664
2665 module_init(acpi_ibm_init);
2666 module_exit(acpi_ibm_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree