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ACPI: ibm-acpi: improve backlight power handling
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / ibm_acpi.c
blobc432901627f81fd7a6be98ff2484f7533f3c7585
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 <linux/kernel.h>
82 #include <linux/module.h>
83 #include <linux/init.h>
84 #include <linux/types.h>
85 #include <linux/string.h>
86
87 #include <linux/proc_fs.h>
88 #include <linux/backlight.h>
89 #include <linux/fb.h>
90 #include <asm/uaccess.h>
91
92 #include <linux/dmi.h>
93 #include <linux/jiffies.h>
94 #include <linux/workqueue.h>
95
96 #include <acpi/acpi_drivers.h>
97 #include <acpi/acnamesp.h>
98
99 #define IBM_NAME "ibm"
100 #define IBM_DESC "IBM ThinkPad ACPI Extras"
101 #define IBM_FILE "ibm_acpi"
102 #define IBM_URL "http://ibm-acpi.sf.net/"
103
104 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
105 MODULE_DESCRIPTION(IBM_DESC);
106 MODULE_VERSION(IBM_VERSION);
107 MODULE_LICENSE("GPL");
108
109 #define IBM_DIR IBM_NAME
110
111 #define IBM_LOG IBM_FILE ": "
112 #define IBM_ERR KERN_ERR IBM_LOG
113 #define IBM_NOTICE KERN_NOTICE IBM_LOG
114 #define IBM_INFO KERN_INFO IBM_LOG
115 #define IBM_DEBUG KERN_DEBUG IBM_LOG
116
117 #define IBM_MAX_ACPI_ARGS 3
118
119 #define __unused __attribute__ ((unused))
120
121 static int experimental;
122 module_param(experimental, int, 0);
123
124 static acpi_handle root_handle = NULL;
125
126 #define IBM_HANDLE(object, parent, paths...) \
127 static acpi_handle object##_handle; \
128 static acpi_handle *object##_parent = &parent##_handle; \
129 static char *object##_path; \
130 static char *object##_paths[] = { paths }
131
132 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
133 "\\_SB.PCI.ISA.EC", /* 570 */
134 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
135 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
136 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
137 "\\_SB.PCI0.ICH3.EC0", /* R31 */
138 "\\_SB.PCI0.LPC.EC", /* all others */
139 );
140
141 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
142 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
143 "\\_SB.PCI0.VID0", /* 770e */
144 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
145 "\\_SB.PCI0.AGP.VID", /* all others */
146 ); /* R30, R31 */
147
148 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
149
150 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
151 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
152 "\\CMS", /* R40, R40e */
153 ); /* all others */
154 #ifdef CONFIG_ACPI_IBM_DOCK
155 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
156 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
157 "\\_SB.PCI0.PCI1.DOCK", /* all others */
158 "\\_SB.PCI.ISA.SLCE", /* 570 */
159 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
160 #endif
161 #ifdef CONFIG_ACPI_IBM_BAY
162 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
163 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
164 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
165 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
166 ); /* A21e, R30, R31 */
167
168 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
169 "_EJ0", /* all others */
170 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
171
172 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
173 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
174 ); /* all others */
175
176 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
177 "_EJ0", /* 770x */
178 ); /* all others */
179 #endif /* CONFIG_ACPI_IBM_BAY */
180
181 /* don't list other alternatives as we install a notify handler on the 570 */
182 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
183
184 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
185 "^HKEY", /* R30, R31 */
186 "HKEY", /* all others */
187 ); /* 570 */
188
189 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
190 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
191
192 IBM_HANDLE(led, ec, "SLED", /* 570 */
193 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
194 "LED", /* all others */
195 ); /* R30, R31 */
196
197 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
198 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
199 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
200 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
201
202 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
203 "\\FSPD", /* 600e/x, 770e, 770x */
204 ); /* all others */
205
206 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
207 "JFNS", /* 770x-JL */
208 ); /* all others */
209
210 #define IBM_HKEY_HID "IBM0068"
211 #define IBM_PCI_HID "PNP0A03"
212
213 enum thermal_access_mode {
214 IBMACPI_THERMAL_NONE = 0, /* No thermal support */
215 IBMACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
216 IBMACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
217 IBMACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
218 IBMACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
219 };
220
221 #define IBMACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
222 struct ibm_thermal_sensors_struct {
223 s32 temp[IBMACPI_MAX_THERMAL_SENSORS];
224 };
225
226 /*
227 * FAN ACCESS MODES
228 *
229 * IBMACPI_FAN_RD_ACPI_GFAN:
230 * ACPI GFAN method: returns fan level
231 *
232 * see IBMACPI_FAN_WR_ACPI_SFAN
233 * EC 0x2f not available if GFAN exists
234 *
235 * IBMACPI_FAN_WR_ACPI_SFAN:
236 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
237 *
238 * EC 0x2f might be available *for reading*, but never for writing.
239 *
240 * IBMACPI_FAN_WR_TPEC:
241 * ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
242 * on almost all ThinkPads
243 *
244 * Fan speed changes of any sort (including those caused by the
245 * disengaged mode) are usually done slowly by the firmware as the
246 * maximum ammount of fan duty cycle change per second seems to be
247 * limited.
248 *
249 * Reading is not available if GFAN exists.
250 * Writing is not available if SFAN exists.
251 *
252 * Bits
253 * 7 automatic mode engaged;
254 * (default operation mode of the ThinkPad)
255 * fan level is ignored in this mode.
256 * 6 disengage mode (takes precedence over bit 7);
257 * not available on all thinkpads. May disable
258 * the tachometer, and speeds up fan to 100% duty-cycle,
259 * which speeds it up far above the standard RPM
260 * levels. It is not impossible that it could cause
261 * hardware damage.
262 * 5-3 unused in some models. Extra bits for fan level
263 * in others, but still useless as all values above
264 * 7 map to the same speed as level 7 in these models.
265 * 2-0 fan level (0..7 usually)
266 * 0x00 = stop
267 * 0x07 = max (set when temperatures critical)
268 * Some ThinkPads may have other levels, see
269 * IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
270 *
271 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
272 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
273 * does so, its initial value is meaningless (0x07).
274 *
275 * For firmware bugs, refer to:
276 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
277 *
278 * ----
279 *
280 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
281 * Main fan tachometer reading (in RPM)
282 *
283 * This register is present on all ThinkPads with a new-style EC, and
284 * it is known not to be present on the A21m/e, and T22, as there is
285 * something else in offset 0x84 according to the ACPI DSDT. Other
286 * ThinkPads from this same time period (and earlier) probably lack the
287 * tachometer as well.
288 *
289 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
290 * was never fixed by IBM to report the EC firmware version string
291 * probably support the tachometer (like the early X models), so
292 * detecting it is quite hard. We need more data to know for sure.
293 *
294 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
295 * might result.
296 *
297 * FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
298 * register is not invalidated in ThinkPads that disable tachometer
299 * readings. Thus, the tachometer readings go stale.
300 *
301 * For firmware bugs, refer to:
302 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
303 *
304 * IBMACPI_FAN_WR_ACPI_FANS:
305 * ThinkPad X31, X40, X41. Not available in the X60.
306 *
307 * FANS ACPI handle: takes three arguments: low speed, medium speed,
308 * high speed. ACPI DSDT seems to map these three speeds to levels
309 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
310 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
311 *
312 * The speeds are stored on handles
313 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
314 *
315 * There are three default speed sets, acessible as handles:
316 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
317 *
318 * ACPI DSDT switches which set is in use depending on various
319 * factors.
320 *
321 * IBMACPI_FAN_WR_TPEC is also available and should be used to
322 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
323 * but the ACPI tables just mention level 7.
324 */
325
326 enum fan_status_access_mode {
327 IBMACPI_FAN_NONE = 0, /* No fan status or control */
328 IBMACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
329 IBMACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
330 };
331
332 enum fan_control_access_mode {
333 IBMACPI_FAN_WR_NONE = 0, /* No fan control */
334 IBMACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
335 IBMACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
336 IBMACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
337 };
338
339 enum fan_control_commands {
340 IBMACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
341 IBMACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
342 IBMACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
343 * and also watchdog cmd */
344 };
345
346 enum { /* Fan control constants */
347 fan_status_offset = 0x2f, /* EC register 0x2f */
348 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
349 * 0x84 must be read before 0x85 */
350
351 IBMACPI_FAN_EC_DISENGAGED = 0x40, /* EC mode: tachometer
352 * disengaged */
353 IBMACPI_FAN_EC_AUTO = 0x80, /* EC mode: auto fan
354 * control */
355 };
356
357 static char *ibm_thinkpad_ec_found = NULL;
358
359 struct ibm_struct {
360 char *name;
361 char param[32];
362
363 char *hid;
364 struct acpi_driver *driver;
365
366 int (*init) (void);
367 int (*read) (char *);
368 int (*write) (char *);
369 void (*exit) (void);
370
371 void (*notify) (struct ibm_struct *, u32);
372 acpi_handle *handle;
373 int type;
374 struct acpi_device *device;
375
376 int driver_registered;
377 int proc_created;
378 int init_called;
379 int notify_installed;
380
381 int experimental;
382 };
383
384 static struct proc_dir_entry *proc_dir = NULL;
385
386 static struct backlight_device *ibm_backlight_device = NULL;
387
388 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
389 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
390 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
391
392 static int acpi_evalf(acpi_handle handle,
393 void *res, char *method, char *fmt, ...)
394 {
395 char *fmt0 = fmt;
396 struct acpi_object_list params;
397 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
398 struct acpi_buffer result, *resultp;
399 union acpi_object out_obj;
400 acpi_status status;
401 va_list ap;
402 char res_type;
403 int success;
404 int quiet;
405
406 if (!*fmt) {
407 printk(IBM_ERR "acpi_evalf() called with empty format\n");
408 return 0;
409 }
410
411 if (*fmt == 'q') {
412 quiet = 1;
413 fmt++;
414 } else
415 quiet = 0;
416
417 res_type = *(fmt++);
418
419 params.count = 0;
420 params.pointer = &in_objs[0];
421
422 va_start(ap, fmt);
423 while (*fmt) {
424 char c = *(fmt++);
425 switch (c) {
426 case 'd': /* int */
427 in_objs[params.count].integer.value = va_arg(ap, int);
428 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
429 break;
430 /* add more types as needed */
431 default:
432 printk(IBM_ERR "acpi_evalf() called "
433 "with invalid format character '%c'\n", c);
434 return 0;
435 }
436 }
437 va_end(ap);
438
439 if (res_type != 'v') {
440 result.length = sizeof(out_obj);
441 result.pointer = &out_obj;
442 resultp = &result;
443 } else
444 resultp = NULL;
445
446 status = acpi_evaluate_object(handle, method, &params, resultp);
447
448 switch (res_type) {
449 case 'd': /* int */
450 if (res)
451 *(int *)res = out_obj.integer.value;
452 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
453 break;
454 case 'v': /* void */
455 success = status == AE_OK;
456 break;
457 /* add more types as needed */
458 default:
459 printk(IBM_ERR "acpi_evalf() called "
460 "with invalid format character '%c'\n", res_type);
461 return 0;
462 }
463
464 if (!success && !quiet)
465 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
466 method, fmt0, status);
467
468 return success;
469 }
470
471 static void __unused acpi_print_int(acpi_handle handle, char *method)
472 {
473 int i;
474
475 if (acpi_evalf(handle, &i, method, "d"))
476 printk(IBM_INFO "%s = 0x%x\n", method, i);
477 else
478 printk(IBM_ERR "error calling %s\n", method);
479 }
480
481 static char *next_cmd(char **cmds)
482 {
483 char *start = *cmds;
484 char *end;
485
486 while ((end = strchr(start, ',')) && end == start)
487 start = end + 1;
488
489 if (!end)
490 return NULL;
491
492 *end = 0;
493 *cmds = end + 1;
494 return start;
495 }
496
497 static int driver_init(void)
498 {
499 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
500 printk(IBM_INFO "%s\n", IBM_URL);
501
502 if (ibm_thinkpad_ec_found)
503 printk(IBM_INFO "ThinkPad EC firmware %s\n",
504 ibm_thinkpad_ec_found);
505
506 return 0;
507 }
508
509 static int driver_read(char *p)
510 {
511 int len = 0;
512
513 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
514 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
515
516 return len;
517 }
518
519 static int hotkey_supported;
520 static int hotkey_mask_supported;
521 static int hotkey_orig_status;
522 static int hotkey_orig_mask;
523
524 static int hotkey_get(int *status, int *mask)
525 {
526 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
527 return 0;
528
529 if (hotkey_mask_supported)
530 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
531 return 0;
532
533 return 1;
534 }
535
536 static int hotkey_set(int status, int mask)
537 {
538 int i;
539
540 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
541 return 0;
542
543 if (hotkey_mask_supported)
544 for (i = 0; i < 32; i++) {
545 int bit = ((1 << i) & mask) != 0;
546 if (!acpi_evalf(hkey_handle,
547 NULL, "MHKM", "vdd", i + 1, bit))
548 return 0;
549 }
550
551 return 1;
552 }
553
554 static int hotkey_init(void)
555 {
556 /* hotkey not supported on 570 */
557 hotkey_supported = hkey_handle != NULL;
558
559 if (hotkey_supported) {
560 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
561 A30, R30, R31, T20-22, X20-21, X22-24 */
562 hotkey_mask_supported =
563 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
564
565 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
566 return -ENODEV;
567 }
568
569 return 0;
570 }
571
572 static int hotkey_read(char *p)
573 {
574 int status, mask;
575 int len = 0;
576
577 if (!hotkey_supported) {
578 len += sprintf(p + len, "status:\t\tnot supported\n");
579 return len;
580 }
581
582 if (!hotkey_get(&status, &mask))
583 return -EIO;
584
585 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
586 if (hotkey_mask_supported) {
587 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
588 len += sprintf(p + len,
589 "commands:\tenable, disable, reset, <mask>\n");
590 } else {
591 len += sprintf(p + len, "mask:\t\tnot supported\n");
592 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
593 }
594
595 return len;
596 }
597
598 static int hotkey_write(char *buf)
599 {
600 int status, mask;
601 char *cmd;
602 int do_cmd = 0;
603
604 if (!hotkey_supported)
605 return -ENODEV;
606
607 if (!hotkey_get(&status, &mask))
608 return -EIO;
609
610 while ((cmd = next_cmd(&buf))) {
611 if (strlencmp(cmd, "enable") == 0) {
612 status = 1;
613 } else if (strlencmp(cmd, "disable") == 0) {
614 status = 0;
615 } else if (strlencmp(cmd, "reset") == 0) {
616 status = hotkey_orig_status;
617 mask = hotkey_orig_mask;
618 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
619 /* mask set */
620 } else if (sscanf(cmd, "%x", &mask) == 1) {
621 /* mask set */
622 } else
623 return -EINVAL;
624 do_cmd = 1;
625 }
626
627 if (do_cmd && !hotkey_set(status, mask))
628 return -EIO;
629
630 return 0;
631 }
632
633 static void hotkey_exit(void)
634 {
635 if (hotkey_supported)
636 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
637 }
638
639 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
640 {
641 int hkey;
642
643 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
644 acpi_bus_generate_event(ibm->device, event, hkey);
645 else {
646 printk(IBM_ERR "unknown hotkey event %d\n", event);
647 acpi_bus_generate_event(ibm->device, event, 0);
648 }
649 }
650
651 static int bluetooth_supported;
652
653 static int bluetooth_init(void)
654 {
655 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
656 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
657 bluetooth_supported = hkey_handle &&
658 acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
659
660 return 0;
661 }
662
663 static int bluetooth_status(void)
664 {
665 int status;
666
667 if (!bluetooth_supported ||
668 !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
669 status = 0;
670
671 return status;
672 }
673
674 static int bluetooth_read(char *p)
675 {
676 int len = 0;
677 int status = bluetooth_status();
678
679 if (!bluetooth_supported)
680 len += sprintf(p + len, "status:\t\tnot supported\n");
681 else if (!(status & 1))
682 len += sprintf(p + len, "status:\t\tnot installed\n");
683 else {
684 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
685 len += sprintf(p + len, "commands:\tenable, disable\n");
686 }
687
688 return len;
689 }
690
691 static int bluetooth_write(char *buf)
692 {
693 int status = bluetooth_status();
694 char *cmd;
695 int do_cmd = 0;
696
697 if (!bluetooth_supported)
698 return -ENODEV;
699
700 while ((cmd = next_cmd(&buf))) {
701 if (strlencmp(cmd, "enable") == 0) {
702 status |= 2;
703 } else if (strlencmp(cmd, "disable") == 0) {
704 status &= ~2;
705 } else
706 return -EINVAL;
707 do_cmd = 1;
708 }
709
710 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
711 return -EIO;
712
713 return 0;
714 }
715
716 static int wan_supported;
717
718 static int wan_init(void)
719 {
720 wan_supported = hkey_handle &&
721 acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
722
723 return 0;
724 }
725
726 static int wan_status(void)
727 {
728 int status;
729
730 if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
731 status = 0;
732
733 return status;
734 }
735
736 static int wan_read(char *p)
737 {
738 int len = 0;
739 int status = wan_status();
740
741 if (!wan_supported)
742 len += sprintf(p + len, "status:\t\tnot supported\n");
743 else if (!(status & 1))
744 len += sprintf(p + len, "status:\t\tnot installed\n");
745 else {
746 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
747 len += sprintf(p + len, "commands:\tenable, disable\n");
748 }
749
750 return len;
751 }
752
753 static int wan_write(char *buf)
754 {
755 int status = wan_status();
756 char *cmd;
757 int do_cmd = 0;
758
759 if (!wan_supported)
760 return -ENODEV;
761
762 while ((cmd = next_cmd(&buf))) {
763 if (strlencmp(cmd, "enable") == 0) {
764 status |= 2;
765 } else if (strlencmp(cmd, "disable") == 0) {
766 status &= ~2;
767 } else
768 return -EINVAL;
769 do_cmd = 1;
770 }
771
772 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
773 return -EIO;
774
775 return 0;
776 }
777
778 enum video_access_mode {
779 IBMACPI_VIDEO_NONE = 0,
780 IBMACPI_VIDEO_570, /* 570 */
781 IBMACPI_VIDEO_770, /* 600e/x, 770e, 770x */
782 IBMACPI_VIDEO_NEW, /* all others */
783 };
784
785 static enum video_access_mode video_supported;
786 static int video_orig_autosw;
787
788 static int video_init(void)
789 {
790 int ivga;
791
792 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
793 /* G41, assume IVGA doesn't change */
794 vid_handle = vid2_handle;
795
796 if (!vid_handle)
797 /* video switching not supported on R30, R31 */
798 video_supported = IBMACPI_VIDEO_NONE;
799 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
800 /* 570 */
801 video_supported = IBMACPI_VIDEO_570;
802 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
803 /* 600e/x, 770e, 770x */
804 video_supported = IBMACPI_VIDEO_770;
805 else
806 /* all others */
807 video_supported = IBMACPI_VIDEO_NEW;
808
809 return 0;
810 }
811
812 static int video_status(void)
813 {
814 int status = 0;
815 int i;
816
817 if (video_supported == IBMACPI_VIDEO_570) {
818 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
819 status = i & 3;
820 } else if (video_supported == IBMACPI_VIDEO_770) {
821 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
822 status |= 0x01 * i;
823 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
824 status |= 0x02 * i;
825 } else if (video_supported == IBMACPI_VIDEO_NEW) {
826 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
827 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
828 status |= 0x02 * i;
829
830 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
831 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
832 status |= 0x01 * i;
833 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
834 status |= 0x08 * i;
835 }
836
837 return status;
838 }
839
840 static int video_autosw(void)
841 {
842 int autosw = 0;
843
844 if (video_supported == IBMACPI_VIDEO_570)
845 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
846 else if (video_supported == IBMACPI_VIDEO_770 ||
847 video_supported == IBMACPI_VIDEO_NEW)
848 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
849
850 return autosw & 1;
851 }
852
853 static int video_read(char *p)
854 {
855 int status = video_status();
856 int autosw = video_autosw();
857 int len = 0;
858
859 if (!video_supported) {
860 len += sprintf(p + len, "status:\t\tnot supported\n");
861 return len;
862 }
863
864 len += sprintf(p + len, "status:\t\tsupported\n");
865 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
866 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
867 if (video_supported == IBMACPI_VIDEO_NEW)
868 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
869 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
870 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
871 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
872 if (video_supported == IBMACPI_VIDEO_NEW)
873 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
874 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
875 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
876
877 return len;
878 }
879
880 static int video_switch(void)
881 {
882 int autosw = video_autosw();
883 int ret;
884
885 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
886 return -EIO;
887 ret = video_supported == IBMACPI_VIDEO_570 ?
888 acpi_evalf(ec_handle, NULL, "_Q16", "v") :
889 acpi_evalf(vid_handle, NULL, "VSWT", "v");
890 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
891
892 return ret;
893 }
894
895 static int video_expand(void)
896 {
897 if (video_supported == IBMACPI_VIDEO_570)
898 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
899 else if (video_supported == IBMACPI_VIDEO_770)
900 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
901 else
902 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
903 }
904
905 static int video_switch2(int status)
906 {
907 int ret;
908
909 if (video_supported == IBMACPI_VIDEO_570) {
910 ret = acpi_evalf(NULL, NULL,
911 "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
912 } else if (video_supported == IBMACPI_VIDEO_770) {
913 int autosw = video_autosw();
914 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
915 return -EIO;
916
917 ret = acpi_evalf(vid_handle, NULL,
918 "ASWT", "vdd", status * 0x100, 0);
919
920 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
921 } else {
922 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
923 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
924 }
925
926 return ret;
927 }
928
929 static int video_write(char *buf)
930 {
931 char *cmd;
932 int enable, disable, status;
933
934 if (!video_supported)
935 return -ENODEV;
936
937 enable = disable = 0;
938
939 while ((cmd = next_cmd(&buf))) {
940 if (strlencmp(cmd, "lcd_enable") == 0) {
941 enable |= 0x01;
942 } else if (strlencmp(cmd, "lcd_disable") == 0) {
943 disable |= 0x01;
944 } else if (strlencmp(cmd, "crt_enable") == 0) {
945 enable |= 0x02;
946 } else if (strlencmp(cmd, "crt_disable") == 0) {
947 disable |= 0x02;
948 } else if (video_supported == IBMACPI_VIDEO_NEW &&
949 strlencmp(cmd, "dvi_enable") == 0) {
950 enable |= 0x08;
951 } else if (video_supported == IBMACPI_VIDEO_NEW &&
952 strlencmp(cmd, "dvi_disable") == 0) {
953 disable |= 0x08;
954 } else if (strlencmp(cmd, "auto_enable") == 0) {
955 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
956 return -EIO;
957 } else if (strlencmp(cmd, "auto_disable") == 0) {
958 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
959 return -EIO;
960 } else if (strlencmp(cmd, "video_switch") == 0) {
961 if (!video_switch())
962 return -EIO;
963 } else if (strlencmp(cmd, "expand_toggle") == 0) {
964 if (!video_expand())
965 return -EIO;
966 } else
967 return -EINVAL;
968 }
969
970 if (enable || disable) {
971 status = (video_status() & 0x0f & ~disable) | enable;
972 if (!video_switch2(status))
973 return -EIO;
974 }
975
976 return 0;
977 }
978
979 static void video_exit(void)
980 {
981 acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
982 }
983
984 static int light_supported;
985 static int light_status_supported;
986
987 static int light_init(void)
988 {
989 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
990 light_supported = (cmos_handle || lght_handle) && !ledb_handle;
991
992 if (light_supported)
993 /* light status not supported on
994 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
995 light_status_supported = acpi_evalf(ec_handle, NULL,
996 "KBLT", "qv");
997
998 return 0;
999 }
1000
1001 static int light_read(char *p)
1002 {
1003 int len = 0;
1004 int status = 0;
1005
1006 if (!light_supported) {
1007 len += sprintf(p + len, "status:\t\tnot supported\n");
1008 } else if (!light_status_supported) {
1009 len += sprintf(p + len, "status:\t\tunknown\n");
1010 len += sprintf(p + len, "commands:\ton, off\n");
1011 } else {
1012 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1013 return -EIO;
1014 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1015 len += sprintf(p + len, "commands:\ton, off\n");
1016 }
1017
1018 return len;
1019 }
1020
1021 static int light_write(char *buf)
1022 {
1023 int cmos_cmd, lght_cmd;
1024 char *cmd;
1025 int success;
1026
1027 if (!light_supported)
1028 return -ENODEV;
1029
1030 while ((cmd = next_cmd(&buf))) {
1031 if (strlencmp(cmd, "on") == 0) {
1032 cmos_cmd = 0x0c;
1033 lght_cmd = 1;
1034 } else if (strlencmp(cmd, "off") == 0) {
1035 cmos_cmd = 0x0d;
1036 lght_cmd = 0;
1037 } else
1038 return -EINVAL;
1039
1040 success = cmos_handle ?
1041 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1042 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1043 if (!success)
1044 return -EIO;
1045 }
1046
1047 return 0;
1048 }
1049
1050 #if defined(CONFIG_ACPI_IBM_DOCK) || defined(CONFIG_ACPI_IBM_BAY)
1051 static int _sta(acpi_handle handle)
1052 {
1053 int status;
1054
1055 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
1056 status = 0;
1057
1058 return status;
1059 }
1060 #endif
1061
1062 #ifdef CONFIG_ACPI_IBM_DOCK
1063 #define dock_docked() (_sta(dock_handle) & 1)
1064
1065 static int dock_read(char *p)
1066 {
1067 int len = 0;
1068 int docked = dock_docked();
1069
1070 if (!dock_handle)
1071 len += sprintf(p + len, "status:\t\tnot supported\n");
1072 else if (!docked)
1073 len += sprintf(p + len, "status:\t\tundocked\n");
1074 else {
1075 len += sprintf(p + len, "status:\t\tdocked\n");
1076 len += sprintf(p + len, "commands:\tdock, undock\n");
1077 }
1078
1079 return len;
1080 }
1081
1082 static int dock_write(char *buf)
1083 {
1084 char *cmd;
1085
1086 if (!dock_docked())
1087 return -ENODEV;
1088
1089 while ((cmd = next_cmd(&buf))) {
1090 if (strlencmp(cmd, "undock") == 0) {
1091 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1092 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1093 return -EIO;
1094 } else if (strlencmp(cmd, "dock") == 0) {
1095 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1096 return -EIO;
1097 } else
1098 return -EINVAL;
1099 }
1100
1101 return 0;
1102 }
1103
1104 static void dock_notify(struct ibm_struct *ibm, u32 event)
1105 {
1106 int docked = dock_docked();
1107 int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1108
1109 if (event == 1 && !pci) /* 570 */
1110 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1111 else if (event == 1 && pci) /* 570 */
1112 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1113 else if (event == 3 && docked)
1114 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1115 else if (event == 3 && !docked)
1116 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1117 else if (event == 0 && docked)
1118 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1119 else {
1120 printk(IBM_ERR "unknown dock event %d, status %d\n",
1121 event, _sta(dock_handle));
1122 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1123 }
1124 }
1125 #endif
1126
1127 #ifdef CONFIG_ACPI_IBM_BAY
1128 static int bay_status_supported;
1129 static int bay_status2_supported;
1130 static int bay_eject_supported;
1131 static int bay_eject2_supported;
1132
1133 static int bay_init(void)
1134 {
1135 bay_status_supported = bay_handle &&
1136 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1137 bay_status2_supported = bay2_handle &&
1138 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1139
1140 bay_eject_supported = bay_handle && bay_ej_handle &&
1141 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1142 bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1143 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1144
1145 return 0;
1146 }
1147
1148 #define bay_occupied(b) (_sta(b##_handle) & 1)
1149
1150 static int bay_read(char *p)
1151 {
1152 int len = 0;
1153 int occupied = bay_occupied(bay);
1154 int occupied2 = bay_occupied(bay2);
1155 int eject, eject2;
1156
1157 len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1158 (occupied ? "occupied" : "unoccupied") :
1159 "not supported");
1160 if (bay_status2_supported)
1161 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1162 "occupied" : "unoccupied");
1163
1164 eject = bay_eject_supported && occupied;
1165 eject2 = bay_eject2_supported && occupied2;
1166
1167 if (eject && eject2)
1168 len += sprintf(p + len, "commands:\teject, eject2\n");
1169 else if (eject)
1170 len += sprintf(p + len, "commands:\teject\n");
1171 else if (eject2)
1172 len += sprintf(p + len, "commands:\teject2\n");
1173
1174 return len;
1175 }
1176
1177 static int bay_write(char *buf)
1178 {
1179 char *cmd;
1180
1181 if (!bay_eject_supported && !bay_eject2_supported)
1182 return -ENODEV;
1183
1184 while ((cmd = next_cmd(&buf))) {
1185 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1186 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1187 return -EIO;
1188 } else if (bay_eject2_supported &&
1189 strlencmp(cmd, "eject2") == 0) {
1190 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1191 return -EIO;
1192 } else
1193 return -EINVAL;
1194 }
1195
1196 return 0;
1197 }
1198
1199 static void bay_notify(struct ibm_struct *ibm, u32 event)
1200 {
1201 acpi_bus_generate_event(ibm->device, event, 0);
1202 }
1203 #endif /* CONFIG_ACPI_IBM_BAY */
1204
1205 static int cmos_read(char *p)
1206 {
1207 int len = 0;
1208
1209 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1210 R30, R31, T20-22, X20-21 */
1211 if (!cmos_handle)
1212 len += sprintf(p + len, "status:\t\tnot supported\n");
1213 else {
1214 len += sprintf(p + len, "status:\t\tsupported\n");
1215 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1216 }
1217
1218 return len;
1219 }
1220
1221 static int cmos_eval(int cmos_cmd)
1222 {
1223 if (cmos_handle)
1224 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1225 else
1226 return 1;
1227 }
1228
1229 static int cmos_write(char *buf)
1230 {
1231 char *cmd;
1232 int cmos_cmd;
1233
1234 if (!cmos_handle)
1235 return -EINVAL;
1236
1237 while ((cmd = next_cmd(&buf))) {
1238 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1239 cmos_cmd >= 0 && cmos_cmd <= 21) {
1240 /* cmos_cmd set */
1241 } else
1242 return -EINVAL;
1243
1244 if (!cmos_eval(cmos_cmd))
1245 return -EIO;
1246 }
1247
1248 return 0;
1249 }
1250
1251 enum led_access_mode {
1252 IBMACPI_LED_NONE = 0,
1253 IBMACPI_LED_570, /* 570 */
1254 IBMACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1255 IBMACPI_LED_NEW, /* all others */
1256 };
1257 static enum led_access_mode led_supported;
1258
1259 static int led_init(void)
1260 {
1261 if (!led_handle)
1262 /* led not supported on R30, R31 */
1263 led_supported = IBMACPI_LED_NONE;
1264 else if (strlencmp(led_path, "SLED") == 0)
1265 /* 570 */
1266 led_supported = IBMACPI_LED_570;
1267 else if (strlencmp(led_path, "SYSL") == 0)
1268 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1269 led_supported = IBMACPI_LED_OLD;
1270 else
1271 /* all others */
1272 led_supported = IBMACPI_LED_NEW;
1273
1274 return 0;
1275 }
1276
1277 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1278
1279 static int led_read(char *p)
1280 {
1281 int len = 0;
1282
1283 if (!led_supported) {
1284 len += sprintf(p + len, "status:\t\tnot supported\n");
1285 return len;
1286 }
1287 len += sprintf(p + len, "status:\t\tsupported\n");
1288
1289 if (led_supported == IBMACPI_LED_570) {
1290 /* 570 */
1291 int i, status;
1292 for (i = 0; i < 8; i++) {
1293 if (!acpi_evalf(ec_handle,
1294 &status, "GLED", "dd", 1 << i))
1295 return -EIO;
1296 len += sprintf(p + len, "%d:\t\t%s\n",
1297 i, led_status(status));
1298 }
1299 }
1300
1301 len += sprintf(p + len, "commands:\t"
1302 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1303
1304 return len;
1305 }
1306
1307 /* off, on, blink */
1308 static const int led_sled_arg1[] = { 0, 1, 3 };
1309 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1310 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1311 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1312
1313 #define EC_HLCL 0x0c
1314 #define EC_HLBL 0x0d
1315 #define EC_HLMS 0x0e
1316
1317 static int led_write(char *buf)
1318 {
1319 char *cmd;
1320 int led, ind, ret;
1321
1322 if (!led_supported)
1323 return -ENODEV;
1324
1325 while ((cmd = next_cmd(&buf))) {
1326 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1327 return -EINVAL;
1328
1329 if (strstr(cmd, "off")) {
1330 ind = 0;
1331 } else if (strstr(cmd, "on")) {
1332 ind = 1;
1333 } else if (strstr(cmd, "blink")) {
1334 ind = 2;
1335 } else
1336 return -EINVAL;
1337
1338 if (led_supported == IBMACPI_LED_570) {
1339 /* 570 */
1340 led = 1 << led;
1341 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1342 led, led_sled_arg1[ind]))
1343 return -EIO;
1344 } else if (led_supported == IBMACPI_LED_OLD) {
1345 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1346 led = 1 << led;
1347 ret = ec_write(EC_HLMS, led);
1348 if (ret >= 0)
1349 ret =
1350 ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
1351 if (ret >= 0)
1352 ret =
1353 ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
1354 if (ret < 0)
1355 return ret;
1356 } else {
1357 /* all others */
1358 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1359 led, led_led_arg1[ind]))
1360 return -EIO;
1361 }
1362 }
1363
1364 return 0;
1365 }
1366
1367 static int beep_read(char *p)
1368 {
1369 int len = 0;
1370
1371 if (!beep_handle)
1372 len += sprintf(p + len, "status:\t\tnot supported\n");
1373 else {
1374 len += sprintf(p + len, "status:\t\tsupported\n");
1375 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1376 }
1377
1378 return len;
1379 }
1380
1381 static int beep_write(char *buf)
1382 {
1383 char *cmd;
1384 int beep_cmd;
1385
1386 if (!beep_handle)
1387 return -ENODEV;
1388
1389 while ((cmd = next_cmd(&buf))) {
1390 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1391 beep_cmd >= 0 && beep_cmd <= 17) {
1392 /* beep_cmd set */
1393 } else
1394 return -EINVAL;
1395 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1396 return -EIO;
1397 }
1398
1399 return 0;
1400 }
1401
1402 static int acpi_ec_read(int i, u8 * p)
1403 {
1404 int v;
1405
1406 if (ecrd_handle) {
1407 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1408 return 0;
1409 *p = v;
1410 } else {
1411 if (ec_read(i, p) < 0)
1412 return 0;
1413 }
1414
1415 return 1;
1416 }
1417
1418 static int acpi_ec_write(int i, u8 v)
1419 {
1420 if (ecwr_handle) {
1421 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1422 return 0;
1423 } else {
1424 if (ec_write(i, v) < 0)
1425 return 0;
1426 }
1427
1428 return 1;
1429 }
1430
1431 static enum thermal_access_mode thermal_read_mode;
1432
1433 static int thermal_init(void)
1434 {
1435 u8 t, ta1, ta2;
1436 int i;
1437 int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1438
1439 if (ibm_thinkpad_ec_found && experimental) {
1440 /*
1441 * Direct EC access mode: sensors at registers
1442 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1443 * non-implemented, thermal sensors return 0x80 when
1444 * not available
1445 */
1446
1447 ta1 = ta2 = 0;
1448 for (i = 0; i < 8; i++) {
1449 if (likely(acpi_ec_read(0x78 + i, &t))) {
1450 ta1 |= t;
1451 } else {
1452 ta1 = 0;
1453 break;
1454 }
1455 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1456 ta2 |= t;
1457 } else {
1458 ta1 = 0;
1459 break;
1460 }
1461 }
1462 if (ta1 == 0) {
1463 /* This is sheer paranoia, but we handle it anyway */
1464 if (acpi_tmp7) {
1465 printk(IBM_ERR
1466 "ThinkPad ACPI EC access misbehaving, "
1467 "falling back to ACPI TMPx access mode\n");
1468 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1469 } else {
1470 printk(IBM_ERR
1471 "ThinkPad ACPI EC access misbehaving, "
1472 "disabling thermal sensors access\n");
1473 thermal_read_mode = IBMACPI_THERMAL_NONE;
1474 }
1475 } else {
1476 thermal_read_mode =
1477 (ta2 != 0) ?
1478 IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
1479 }
1480 } else if (acpi_tmp7) {
1481 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1482 /* 600e/x, 770e, 770x */
1483 thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
1484 } else {
1485 /* Standard ACPI TMPx access, max 8 sensors */
1486 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1487 }
1488 } else {
1489 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1490 thermal_read_mode = IBMACPI_THERMAL_NONE;
1491 }
1492
1493 return 0;
1494 }
1495
1496 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1497 {
1498 int i, t;
1499 s8 tmp;
1500 char tmpi[] = "TMPi";
1501
1502 if (!s)
1503 return -EINVAL;
1504
1505 switch (thermal_read_mode) {
1506 #if IBMACPI_MAX_THERMAL_SENSORS >= 16
1507 case IBMACPI_THERMAL_TPEC_16:
1508 for (i = 0; i < 8; i++) {
1509 if (!acpi_ec_read(0xC0 + i, &tmp))
1510 return -EIO;
1511 s->temp[i + 8] = tmp * 1000;
1512 }
1513 /* fallthrough */
1514 #endif
1515 case IBMACPI_THERMAL_TPEC_8:
1516 for (i = 0; i < 8; i++) {
1517 if (!acpi_ec_read(0x78 + i, &tmp))
1518 return -EIO;
1519 s->temp[i] = tmp * 1000;
1520 }
1521 return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
1522
1523 case IBMACPI_THERMAL_ACPI_UPDT:
1524 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1525 return -EIO;
1526 for (i = 0; i < 8; i++) {
1527 tmpi[3] = '0' + i;
1528 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1529 return -EIO;
1530 s->temp[i] = (t - 2732) * 100;
1531 }
1532 return 8;
1533
1534 case IBMACPI_THERMAL_ACPI_TMP07:
1535 for (i = 0; i < 8; i++) {
1536 tmpi[3] = '0' + i;
1537 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1538 return -EIO;
1539 s->temp[i] = t * 1000;
1540 }
1541 return 8;
1542
1543 case IBMACPI_THERMAL_NONE:
1544 default:
1545 return 0;
1546 }
1547 }
1548
1549 static int thermal_read(char *p)
1550 {
1551 int len = 0;
1552 int n, i;
1553 struct ibm_thermal_sensors_struct t;
1554
1555 n = thermal_get_sensors(&t);
1556 if (unlikely(n < 0))
1557 return n;
1558
1559 len += sprintf(p + len, "temperatures:\t");
1560
1561 if (n > 0) {
1562 for (i = 0; i < (n - 1); i++)
1563 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1564 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1565 } else
1566 len += sprintf(p + len, "not supported\n");
1567
1568 return len;
1569 }
1570
1571 static u8 ecdump_regs[256];
1572
1573 static int ecdump_read(char *p)
1574 {
1575 int len = 0;
1576 int i, j;
1577 u8 v;
1578
1579 len += sprintf(p + len, "EC "
1580 " +00 +01 +02 +03 +04 +05 +06 +07"
1581 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1582 for (i = 0; i < 256; i += 16) {
1583 len += sprintf(p + len, "EC 0x%02x:", i);
1584 for (j = 0; j < 16; j++) {
1585 if (!acpi_ec_read(i + j, &v))
1586 break;
1587 if (v != ecdump_regs[i + j])
1588 len += sprintf(p + len, " *%02x", v);
1589 else
1590 len += sprintf(p + len, " %02x", v);
1591 ecdump_regs[i + j] = v;
1592 }
1593 len += sprintf(p + len, "\n");
1594 if (j != 16)
1595 break;
1596 }
1597
1598 /* These are way too dangerous to advertise openly... */
1599 #if 0
1600 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1601 " (<offset> is 00-ff, <value> is 00-ff)\n");
1602 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1603 " (<offset> is 00-ff, <value> is 0-255)\n");
1604 #endif
1605 return len;
1606 }
1607
1608 static int ecdump_write(char *buf)
1609 {
1610 char *cmd;
1611 int i, v;
1612
1613 while ((cmd = next_cmd(&buf))) {
1614 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1615 /* i and v set */
1616 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1617 /* i and v set */
1618 } else
1619 return -EINVAL;
1620 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1621 if (!acpi_ec_write(i, v))
1622 return -EIO;
1623 } else
1624 return -EINVAL;
1625 }
1626
1627 return 0;
1628 }
1629
1630 static int brightness_offset = 0x31;
1631
1632 static int brightness_get(struct backlight_device *bd)
1633 {
1634 u8 level;
1635 if (!acpi_ec_read(brightness_offset, &level))
1636 return -EIO;
1637
1638 level &= 0x7;
1639
1640 return level;
1641 }
1642
1643 static int brightness_read(char *p)
1644 {
1645 int len = 0;
1646 int level;
1647
1648 if ((level = brightness_get(NULL)) < 0) {
1649 len += sprintf(p + len, "level:\t\tunreadable\n");
1650 } else {
1651 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1652 len += sprintf(p + len, "commands:\tup, down\n");
1653 len += sprintf(p + len, "commands:\tlevel <level>"
1654 " (<level> is 0-7)\n");
1655 }
1656
1657 return len;
1658 }
1659
1660 #define BRIGHTNESS_UP 4
1661 #define BRIGHTNESS_DOWN 5
1662
1663 static int brightness_set(int value)
1664 {
1665 int cmos_cmd, inc, i;
1666 int current_value = brightness_get(NULL);
1667
1668 value &= 7;
1669
1670 cmos_cmd = value > current_value ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
1671 inc = value > current_value ? 1 : -1;
1672 for (i = current_value; i != value; i += inc) {
1673 if (!cmos_eval(cmos_cmd))
1674 return -EIO;
1675 if (!acpi_ec_write(brightness_offset, i + inc))
1676 return -EIO;
1677 }
1678
1679 return 0;
1680 }
1681
1682 static int brightness_write(char *buf)
1683 {
1684 int level;
1685 int new_level;
1686 char *cmd;
1687
1688 while ((cmd = next_cmd(&buf))) {
1689 if ((level = brightness_get(NULL)) < 0)
1690 return level;
1691 level &= 7;
1692
1693 if (strlencmp(cmd, "up") == 0) {
1694 new_level = level == 7 ? 7 : level + 1;
1695 } else if (strlencmp(cmd, "down") == 0) {
1696 new_level = level == 0 ? 0 : level - 1;
1697 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1698 new_level >= 0 && new_level <= 7) {
1699 /* new_level set */
1700 } else
1701 return -EINVAL;
1702
1703 brightness_set(new_level);
1704 }
1705
1706 return 0;
1707 }
1708
1709 static int brightness_update_status(struct backlight_device *bd)
1710 {
1711 return brightness_set(
1712 (bd->props->fb_blank == FB_BLANK_UNBLANK &&
1713 bd->props->power == FB_BLANK_UNBLANK) ?
1714 bd->props->brightness : 0);
1715 }
1716
1717 static struct backlight_properties ibm_backlight_data = {
1718 .owner = THIS_MODULE,
1719 .get_brightness = brightness_get,
1720 .update_status = brightness_update_status,
1721 .max_brightness = 7,
1722 };
1723
1724 static int brightness_init(void)
1725 {
1726 int b;
1727
1728 b = brightness_get(NULL);
1729 if (b < 0)
1730 return b;
1731
1732 ibm_backlight_device = backlight_device_register("ibm", NULL,
1733 &ibm_backlight_data);
1734 if (IS_ERR(ibm_backlight_device)) {
1735 printk(IBM_ERR "Could not register backlight device\n");
1736 return PTR_ERR(ibm_backlight_device);
1737 }
1738
1739 ibm_backlight_device->props->brightness = b;
1740 brightness_update_status(ibm_backlight_device);
1741
1742 return 0;
1743 }
1744
1745 static void brightness_exit(void)
1746 {
1747 if (ibm_backlight_device) {
1748 /* FIXME: can be removed when sanity returns to backlight_device_unregister */
1749 if (likely(ibm_backlight_device->props)) {
1750 down(&ibm_backlight_device->sem);
1751 ibm_backlight_device->props->update_status = NULL;
1752 up(&ibm_backlight_device->sem);
1753 }
1754
1755 backlight_device_unregister(ibm_backlight_device);
1756 ibm_backlight_device = NULL;
1757 }
1758 }
1759
1760 static int volume_offset = 0x30;
1761
1762 static int volume_read(char *p)
1763 {
1764 int len = 0;
1765 u8 level;
1766
1767 if (!acpi_ec_read(volume_offset, &level)) {
1768 len += sprintf(p + len, "level:\t\tunreadable\n");
1769 } else {
1770 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1771 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1772 len += sprintf(p + len, "commands:\tup, down, mute\n");
1773 len += sprintf(p + len, "commands:\tlevel <level>"
1774 " (<level> is 0-15)\n");
1775 }
1776
1777 return len;
1778 }
1779
1780 #define VOLUME_DOWN 0
1781 #define VOLUME_UP 1
1782 #define VOLUME_MUTE 2
1783
1784 static int volume_write(char *buf)
1785 {
1786 int cmos_cmd, inc, i;
1787 u8 level, mute;
1788 int new_level, new_mute;
1789 char *cmd;
1790
1791 while ((cmd = next_cmd(&buf))) {
1792 if (!acpi_ec_read(volume_offset, &level))
1793 return -EIO;
1794 new_mute = mute = level & 0x40;
1795 new_level = level = level & 0xf;
1796
1797 if (strlencmp(cmd, "up") == 0) {
1798 if (mute)
1799 new_mute = 0;
1800 else
1801 new_level = level == 15 ? 15 : level + 1;
1802 } else if (strlencmp(cmd, "down") == 0) {
1803 if (mute)
1804 new_mute = 0;
1805 else
1806 new_level = level == 0 ? 0 : level - 1;
1807 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1808 new_level >= 0 && new_level <= 15) {
1809 /* new_level set */
1810 } else if (strlencmp(cmd, "mute") == 0) {
1811 new_mute = 0x40;
1812 } else
1813 return -EINVAL;
1814
1815 if (new_level != level) { /* mute doesn't change */
1816 cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1817 inc = new_level > level ? 1 : -1;
1818
1819 if (mute && (!cmos_eval(cmos_cmd) ||
1820 !acpi_ec_write(volume_offset, level)))
1821 return -EIO;
1822
1823 for (i = level; i != new_level; i += inc)
1824 if (!cmos_eval(cmos_cmd) ||
1825 !acpi_ec_write(volume_offset, i + inc))
1826 return -EIO;
1827
1828 if (mute && (!cmos_eval(VOLUME_MUTE) ||
1829 !acpi_ec_write(volume_offset,
1830 new_level + mute)))
1831 return -EIO;
1832 }
1833
1834 if (new_mute != mute) { /* level doesn't change */
1835 cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1836
1837 if (!cmos_eval(cmos_cmd) ||
1838 !acpi_ec_write(volume_offset, level + new_mute))
1839 return -EIO;
1840 }
1841 }
1842
1843 return 0;
1844 }
1845
1846 static enum fan_status_access_mode fan_status_access_mode;
1847 static enum fan_control_access_mode fan_control_access_mode;
1848 static enum fan_control_commands fan_control_commands;
1849
1850 static int fan_control_status_known;
1851 static u8 fan_control_initial_status;
1852
1853 static void fan_watchdog_fire(void *ignored);
1854 static int fan_watchdog_maxinterval;
1855 static DECLARE_WORK(fan_watchdog_task, fan_watchdog_fire, NULL);
1856
1857 static int fan_init(void)
1858 {
1859 fan_status_access_mode = IBMACPI_FAN_NONE;
1860 fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1861 fan_control_commands = 0;
1862 fan_control_status_known = 1;
1863 fan_watchdog_maxinterval = 0;
1864
1865 if (gfan_handle) {
1866 /* 570, 600e/x, 770e, 770x */
1867 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1868 } else {
1869 /* all other ThinkPads: note that even old-style
1870 * ThinkPad ECs supports the fan control register */
1871 if (likely(acpi_ec_read(fan_status_offset,
1872 &fan_control_initial_status))) {
1873 fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1874
1875 /* In some ThinkPads, neither the EC nor the ACPI
1876 * DSDT initialize the fan status, and it ends up
1877 * being set to 0x07 when it *could* be either
1878 * 0x07 or 0x80.
1879 *
1880 * Enable for TP-1Y (T43), TP-78 (R51e),
1881 * TP-76 (R52), TP-70 (T43, R52), which are known
1882 * to be buggy. */
1883 if (fan_control_initial_status == 0x07 &&
1884 ibm_thinkpad_ec_found &&
1885 ((ibm_thinkpad_ec_found[0] == '1' &&
1886 ibm_thinkpad_ec_found[1] == 'Y') ||
1887 (ibm_thinkpad_ec_found[0] == '7' &&
1888 (ibm_thinkpad_ec_found[1] == '6' ||
1889 ibm_thinkpad_ec_found[1] == '8' ||
1890 ibm_thinkpad_ec_found[1] == '0'))
1891 )) {
1892 printk(IBM_NOTICE
1893 "fan_init: initial fan status is "
1894 "unknown, assuming it is in auto "
1895 "mode\n");
1896 fan_control_status_known = 0;
1897 }
1898 } else {
1899 printk(IBM_ERR
1900 "ThinkPad ACPI EC access misbehaving, "
1901 "fan status and control unavailable\n");
1902 return 0;
1903 }
1904 }
1905
1906 if (sfan_handle) {
1907 /* 570, 770x-JL */
1908 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
1909 fan_control_commands |=
1910 IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
1911 } else {
1912 if (!gfan_handle) {
1913 /* gfan without sfan means no fan control */
1914 /* all other models implement TP EC 0x2f control */
1915
1916 if (fans_handle) {
1917 /* X31, X40, X41 */
1918 fan_control_access_mode =
1919 IBMACPI_FAN_WR_ACPI_FANS;
1920 fan_control_commands |=
1921 IBMACPI_FAN_CMD_SPEED |
1922 IBMACPI_FAN_CMD_LEVEL |
1923 IBMACPI_FAN_CMD_ENABLE;
1924 } else {
1925 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
1926 fan_control_commands |=
1927 IBMACPI_FAN_CMD_LEVEL |
1928 IBMACPI_FAN_CMD_ENABLE;
1929 }
1930 }
1931 }
1932
1933 return 0;
1934 }
1935
1936 static int fan_get_status(u8 *status)
1937 {
1938 u8 s;
1939
1940 /* TODO:
1941 * Add IBMACPI_FAN_RD_ACPI_FANS ? */
1942
1943 switch (fan_status_access_mode) {
1944 case IBMACPI_FAN_RD_ACPI_GFAN:
1945 /* 570, 600e/x, 770e, 770x */
1946
1947 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1948 return -EIO;
1949
1950 if (likely(status))
1951 *status = s & 0x07;
1952
1953 break;
1954
1955 case IBMACPI_FAN_RD_TPEC:
1956 /* all except 570, 600e/x, 770e, 770x */
1957 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
1958 return -EIO;
1959
1960 if (likely(status))
1961 *status = s;
1962
1963 break;
1964
1965 default:
1966 return -ENXIO;
1967 }
1968
1969 return 0;
1970 }
1971
1972 static int fan_get_speed(unsigned int *speed)
1973 {
1974 u8 hi, lo;
1975
1976 switch (fan_status_access_mode) {
1977 case IBMACPI_FAN_RD_TPEC:
1978 /* all except 570, 600e/x, 770e, 770x */
1979 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
1980 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
1981 return -EIO;
1982
1983 if (likely(speed))
1984 *speed = (hi << 8) | lo;
1985
1986 break;
1987
1988 default:
1989 return -ENXIO;
1990 }
1991
1992 return 0;
1993 }
1994
1995 static void fan_exit(void)
1996 {
1997 cancel_delayed_work(&fan_watchdog_task);
1998 flush_scheduled_work();
1999 }
2000
2001 static void fan_watchdog_reset(void)
2002 {
2003 static int fan_watchdog_active = 0;
2004
2005 if (fan_watchdog_active)
2006 cancel_delayed_work(&fan_watchdog_task);
2007
2008 if (fan_watchdog_maxinterval > 0) {
2009 fan_watchdog_active = 1;
2010 if (!schedule_delayed_work(&fan_watchdog_task,
2011 msecs_to_jiffies(fan_watchdog_maxinterval
2012 * 1000))) {
2013 printk(IBM_ERR "failed to schedule the fan watchdog, "
2014 "watchdog will not trigger\n");
2015 }
2016 } else
2017 fan_watchdog_active = 0;
2018 }
2019
2020 static int fan_read(char *p)
2021 {
2022 int len = 0;
2023 int rc;
2024 u8 status;
2025 unsigned int speed = 0;
2026
2027 switch (fan_status_access_mode) {
2028 case IBMACPI_FAN_RD_ACPI_GFAN:
2029 /* 570, 600e/x, 770e, 770x */
2030 if ((rc = fan_get_status(&status)) < 0)
2031 return rc;
2032
2033 len += sprintf(p + len, "status:\t\t%s\n"
2034 "level:\t\t%d\n",
2035 (status != 0) ? "enabled" : "disabled", status);
2036 break;
2037
2038 case IBMACPI_FAN_RD_TPEC:
2039 /* all except 570, 600e/x, 770e, 770x */
2040 if ((rc = fan_get_status(&status)) < 0)
2041 return rc;
2042
2043 if (unlikely(!fan_control_status_known)) {
2044 if (status != fan_control_initial_status)
2045 fan_control_status_known = 1;
2046 else
2047 /* Return most likely status. In fact, it
2048 * might be the only possible status */
2049 status = IBMACPI_FAN_EC_AUTO;
2050 }
2051
2052 len += sprintf(p + len, "status:\t\t%s\n",
2053 (status != 0) ? "enabled" : "disabled");
2054
2055 /* No ThinkPad boots on disengaged mode, we can safely
2056 * assume the tachometer is online if fan control status
2057 * was unknown */
2058 if ((rc = fan_get_speed(&speed)) < 0)
2059 return rc;
2060
2061 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2062
2063 if (status & IBMACPI_FAN_EC_DISENGAGED)
2064 /* Disengaged mode takes precedence */
2065 len += sprintf(p + len, "level:\t\tdisengaged\n");
2066 else if (status & IBMACPI_FAN_EC_AUTO)
2067 len += sprintf(p + len, "level:\t\tauto\n");
2068 else
2069 len += sprintf(p + len, "level:\t\t%d\n", status);
2070 break;
2071
2072 case IBMACPI_FAN_NONE:
2073 default:
2074 len += sprintf(p + len, "status:\t\tnot supported\n");
2075 }
2076
2077 if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
2078 len += sprintf(p + len, "commands:\tlevel <level>");
2079
2080 switch (fan_control_access_mode) {
2081 case IBMACPI_FAN_WR_ACPI_SFAN:
2082 len += sprintf(p + len, " (<level> is 0-7)\n");
2083 break;
2084
2085 default:
2086 len += sprintf(p + len, " (<level> is 0-7, "
2087 "auto, disengaged)\n");
2088 break;
2089 }
2090 }
2091
2092 if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
2093 len += sprintf(p + len, "commands:\tenable, disable\n"
2094 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2095 "1-120 (seconds))\n");
2096
2097 if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
2098 len += sprintf(p + len, "commands:\tspeed <speed>"
2099 " (<speed> is 0-65535)\n");
2100
2101 return len;
2102 }
2103
2104 static int fan_set_level(int level)
2105 {
2106 switch (fan_control_access_mode) {
2107 case IBMACPI_FAN_WR_ACPI_SFAN:
2108 if (level >= 0 && level <= 7) {
2109 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2110 return -EIO;
2111 } else
2112 return -EINVAL;
2113 break;
2114
2115 case IBMACPI_FAN_WR_ACPI_FANS:
2116 case IBMACPI_FAN_WR_TPEC:
2117 if ((level != IBMACPI_FAN_EC_AUTO) &&
2118 (level != IBMACPI_FAN_EC_DISENGAGED) &&
2119 ((level < 0) || (level > 7)))
2120 return -EINVAL;
2121
2122 if (!acpi_ec_write(fan_status_offset, level))
2123 return -EIO;
2124 else
2125 fan_control_status_known = 1;
2126 break;
2127
2128 default:
2129 return -ENXIO;
2130 }
2131 return 0;
2132 }
2133
2134 static int fan_set_enable(void)
2135 {
2136 u8 s;
2137 int rc;
2138
2139 switch (fan_control_access_mode) {
2140 case IBMACPI_FAN_WR_ACPI_FANS:
2141 case IBMACPI_FAN_WR_TPEC:
2142 if ((rc = fan_get_status(&s)) < 0)
2143 return rc;
2144
2145 /* Don't go out of emergency fan mode */
2146 if (s != 7)
2147 s = IBMACPI_FAN_EC_AUTO;
2148
2149 if (!acpi_ec_write(fan_status_offset, s))
2150 return -EIO;
2151 else
2152 fan_control_status_known = 1;
2153 break;
2154
2155 case IBMACPI_FAN_WR_ACPI_SFAN:
2156 if ((rc = fan_get_status(&s)) < 0)
2157 return rc;
2158
2159 s &= 0x07;
2160
2161 /* Set fan to at least level 4 */
2162 if (s < 4)
2163 s = 4;
2164
2165 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2166 return -EIO;
2167 break;
2168
2169 default:
2170 return -ENXIO;
2171 }
2172 return 0;
2173 }
2174
2175 static int fan_set_disable(void)
2176 {
2177 switch (fan_control_access_mode) {
2178 case IBMACPI_FAN_WR_ACPI_FANS:
2179 case IBMACPI_FAN_WR_TPEC:
2180 if (!acpi_ec_write(fan_status_offset, 0x00))
2181 return -EIO;
2182 else
2183 fan_control_status_known = 1;
2184 break;
2185
2186 case IBMACPI_FAN_WR_ACPI_SFAN:
2187 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2188 return -EIO;
2189 break;
2190
2191 default:
2192 return -ENXIO;
2193 }
2194 return 0;
2195 }
2196
2197 static int fan_set_speed(int speed)
2198 {
2199 switch (fan_control_access_mode) {
2200 case IBMACPI_FAN_WR_ACPI_FANS:
2201 if (speed >= 0 && speed <= 65535) {
2202 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2203 speed, speed, speed))
2204 return -EIO;
2205 } else
2206 return -EINVAL;
2207 break;
2208
2209 default:
2210 return -ENXIO;
2211 }
2212 return 0;
2213 }
2214
2215 static int fan_write_cmd_level(const char *cmd, int *rc)
2216 {
2217 int level;
2218
2219 if (strlencmp(cmd, "level auto") == 0)
2220 level = IBMACPI_FAN_EC_AUTO;
2221 else if (strlencmp(cmd, "level disengaged") == 0)
2222 level = IBMACPI_FAN_EC_DISENGAGED;
2223 else if (sscanf(cmd, "level %d", &level) != 1)
2224 return 0;
2225
2226 if ((*rc = fan_set_level(level)) == -ENXIO)
2227 printk(IBM_ERR "level command accepted for unsupported "
2228 "access mode %d", fan_control_access_mode);
2229
2230 return 1;
2231 }
2232
2233 static int fan_write_cmd_enable(const char *cmd, int *rc)
2234 {
2235 if (strlencmp(cmd, "enable") != 0)
2236 return 0;
2237
2238 if ((*rc = fan_set_enable()) == -ENXIO)
2239 printk(IBM_ERR "enable command accepted for unsupported "
2240 "access mode %d", fan_control_access_mode);
2241
2242 return 1;
2243 }
2244
2245 static int fan_write_cmd_disable(const char *cmd, int *rc)
2246 {
2247 if (strlencmp(cmd, "disable") != 0)
2248 return 0;
2249
2250 if ((*rc = fan_set_disable()) == -ENXIO)
2251 printk(IBM_ERR "disable command accepted for unsupported "
2252 "access mode %d", fan_control_access_mode);
2253
2254 return 1;
2255 }
2256
2257 static int fan_write_cmd_speed(const char *cmd, int *rc)
2258 {
2259 int speed;
2260
2261 /* TODO:
2262 * Support speed <low> <medium> <high> ? */
2263
2264 if (sscanf(cmd, "speed %d", &speed) != 1)
2265 return 0;
2266
2267 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2268 printk(IBM_ERR "speed command accepted for unsupported "
2269 "access mode %d", fan_control_access_mode);
2270
2271 return 1;
2272 }
2273
2274 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2275 {
2276 int interval;
2277
2278 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2279 return 0;
2280
2281 if (interval < 0 || interval > 120)
2282 *rc = -EINVAL;
2283 else
2284 fan_watchdog_maxinterval = interval;
2285
2286 return 1;
2287 }
2288
2289 static int fan_write(char *buf)
2290 {
2291 char *cmd;
2292 int rc = 0;
2293
2294 while (!rc && (cmd = next_cmd(&buf))) {
2295 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2296 fan_write_cmd_level(cmd, &rc)) &&
2297 !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2298 (fan_write_cmd_enable(cmd, &rc) ||
2299 fan_write_cmd_disable(cmd, &rc) ||
2300 fan_write_cmd_watchdog(cmd, &rc))) &&
2301 !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2302 fan_write_cmd_speed(cmd, &rc))
2303 )
2304 rc = -EINVAL;
2305 else if (!rc)
2306 fan_watchdog_reset();
2307 }
2308
2309 return rc;
2310 }
2311
2312 static void fan_watchdog_fire(void *ignored)
2313 {
2314 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2315 if (fan_set_enable()) {
2316 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2317 /* reschedule for later */
2318 fan_watchdog_reset();
2319 }
2320 }
2321
2322 static struct ibm_struct ibms[] = {
2323 {
2324 .name = "driver",
2325 .init = driver_init,
2326 .read = driver_read,
2327 },
2328 {
2329 .name = "hotkey",
2330 .hid = IBM_HKEY_HID,
2331 .init = hotkey_init,
2332 .read = hotkey_read,
2333 .write = hotkey_write,
2334 .exit = hotkey_exit,
2335 .notify = hotkey_notify,
2336 .handle = &hkey_handle,
2337 .type = ACPI_DEVICE_NOTIFY,
2338 },
2339 {
2340 .name = "bluetooth",
2341 .init = bluetooth_init,
2342 .read = bluetooth_read,
2343 .write = bluetooth_write,
2344 },
2345 {
2346 .name = "wan",
2347 .init = wan_init,
2348 .read = wan_read,
2349 .write = wan_write,
2350 .experimental = 1,
2351 },
2352 {
2353 .name = "video",
2354 .init = video_init,
2355 .read = video_read,
2356 .write = video_write,
2357 .exit = video_exit,
2358 },
2359 {
2360 .name = "light",
2361 .init = light_init,
2362 .read = light_read,
2363 .write = light_write,
2364 },
2365 #ifdef CONFIG_ACPI_IBM_DOCK
2366 {
2367 .name = "dock",
2368 .read = dock_read,
2369 .write = dock_write,
2370 .notify = dock_notify,
2371 .handle = &dock_handle,
2372 .type = ACPI_SYSTEM_NOTIFY,
2373 },
2374 {
2375 .name = "dock",
2376 .hid = IBM_PCI_HID,
2377 .notify = dock_notify,
2378 .handle = &pci_handle,
2379 .type = ACPI_SYSTEM_NOTIFY,
2380 },
2381 #endif
2382 #ifdef CONFIG_ACPI_IBM_BAY
2383 {
2384 .name = "bay",
2385 .init = bay_init,
2386 .read = bay_read,
2387 .write = bay_write,
2388 .notify = bay_notify,
2389 .handle = &bay_handle,
2390 .type = ACPI_SYSTEM_NOTIFY,
2391 },
2392 #endif /* CONFIG_ACPI_IBM_BAY */
2393 {
2394 .name = "cmos",
2395 .read = cmos_read,
2396 .write = cmos_write,
2397 },
2398 {
2399 .name = "led",
2400 .init = led_init,
2401 .read = led_read,
2402 .write = led_write,
2403 },
2404 {
2405 .name = "beep",
2406 .read = beep_read,
2407 .write = beep_write,
2408 },
2409 {
2410 .name = "thermal",
2411 .init = thermal_init,
2412 .read = thermal_read,
2413 },
2414 {
2415 .name = "ecdump",
2416 .read = ecdump_read,
2417 .write = ecdump_write,
2418 .experimental = 1,
2419 },
2420 {
2421 .name = "brightness",
2422 .read = brightness_read,
2423 .write = brightness_write,
2424 .init = brightness_init,
2425 .exit = brightness_exit,
2426 },
2427 {
2428 .name = "volume",
2429 .read = volume_read,
2430 .write = volume_write,
2431 },
2432 {
2433 .name = "fan",
2434 .read = fan_read,
2435 .write = fan_write,
2436 .init = fan_init,
2437 .exit = fan_exit,
2438 .experimental = 1,
2439 },
2440 };
2441
2442 static int dispatch_read(char *page, char **start, off_t off, int count,
2443 int *eof, void *data)
2444 {
2445 struct ibm_struct *ibm = data;
2446 int len;
2447
2448 if (!ibm || !ibm->read)
2449 return -EINVAL;
2450
2451 len = ibm->read(page);
2452 if (len < 0)
2453 return len;
2454
2455 if (len <= off + count)
2456 *eof = 1;
2457 *start = page + off;
2458 len -= off;
2459 if (len > count)
2460 len = count;
2461 if (len < 0)
2462 len = 0;
2463
2464 return len;
2465 }
2466
2467 static int dispatch_write(struct file *file, const char __user * userbuf,
2468 unsigned long count, void *data)
2469 {
2470 struct ibm_struct *ibm = data;
2471 char *kernbuf;
2472 int ret;
2473
2474 if (!ibm || !ibm->write)
2475 return -EINVAL;
2476
2477 kernbuf = kmalloc(count + 2, GFP_KERNEL);
2478 if (!kernbuf)
2479 return -ENOMEM;
2480
2481 if (copy_from_user(kernbuf, userbuf, count)) {
2482 kfree(kernbuf);
2483 return -EFAULT;
2484 }
2485
2486 kernbuf[count] = 0;
2487 strcat(kernbuf, ",");
2488 ret = ibm->write(kernbuf);
2489 if (ret == 0)
2490 ret = count;
2491
2492 kfree(kernbuf);
2493
2494 return ret;
2495 }
2496
2497 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
2498 {
2499 struct ibm_struct *ibm = data;
2500
2501 if (!ibm || !ibm->notify)
2502 return;
2503
2504 ibm->notify(ibm, event);
2505 }
2506
2507 static int __init setup_notify(struct ibm_struct *ibm)
2508 {
2509 acpi_status status;
2510 int ret;
2511
2512 if (!*ibm->handle)
2513 return 0;
2514
2515 ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
2516 if (ret < 0) {
2517 printk(IBM_ERR "%s device not present\n", ibm->name);
2518 return 0;
2519 }
2520
2521 acpi_driver_data(ibm->device) = ibm;
2522 sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
2523
2524 status = acpi_install_notify_handler(*ibm->handle, ibm->type,
2525 dispatch_notify, ibm);
2526 if (ACPI_FAILURE(status)) {
2527 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
2528 ibm->name, status);
2529 return -ENODEV;
2530 }
2531 ibm->notify_installed = 1;
2532 return 0;
2533 }
2534
2535 static int __init ibm_device_add(struct acpi_device *device)
2536 {
2537 return 0;
2538 }
2539
2540 static int __init register_driver(struct ibm_struct *ibm)
2541 {
2542 int ret;
2543
2544 ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
2545 if (!ibm->driver) {
2546 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
2547 return -1;
2548 }
2549
2550 sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
2551 ibm->driver->ids = ibm->hid;
2552 ibm->driver->ops.add = &ibm_device_add;
2553
2554 ret = acpi_bus_register_driver(ibm->driver);
2555 if (ret < 0) {
2556 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
2557 ibm->hid, ret);
2558 kfree(ibm->driver);
2559 }
2560
2561 return ret;
2562 }
2563
2564 static int __init ibm_init(struct ibm_struct *ibm)
2565 {
2566 int ret;
2567 struct proc_dir_entry *entry;
2568
2569 if (ibm->experimental && !experimental)
2570 return 0;
2571
2572 if (ibm->hid) {
2573 ret = register_driver(ibm);
2574 if (ret < 0)
2575 return ret;
2576 ibm->driver_registered = 1;
2577 }
2578
2579 if (ibm->init) {
2580 ret = ibm->init();
2581 if (ret != 0)
2582 return ret;
2583 ibm->init_called = 1;
2584 }
2585
2586 if (ibm->read) {
2587 entry = create_proc_entry(ibm->name,
2588 S_IFREG | S_IRUGO | S_IWUSR,
2589 proc_dir);
2590 if (!entry) {
2591 printk(IBM_ERR "unable to create proc entry %s\n",
2592 ibm->name);
2593 return -ENODEV;
2594 }
2595 entry->owner = THIS_MODULE;
2596 entry->data = ibm;
2597 entry->read_proc = &dispatch_read;
2598 if (ibm->write)
2599 entry->write_proc = &dispatch_write;
2600 ibm->proc_created = 1;
2601 }
2602
2603 if (ibm->notify) {
2604 ret = setup_notify(ibm);
2605 if (ret < 0)
2606 return ret;
2607 }
2608
2609 return 0;
2610 }
2611
2612 static void ibm_exit(struct ibm_struct *ibm)
2613 {
2614 if (ibm->notify_installed)
2615 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2616 dispatch_notify);
2617
2618 if (ibm->proc_created)
2619 remove_proc_entry(ibm->name, proc_dir);
2620
2621 if (ibm->init_called && ibm->exit)
2622 ibm->exit();
2623
2624 if (ibm->driver_registered) {
2625 acpi_bus_unregister_driver(ibm->driver);
2626 kfree(ibm->driver);
2627 }
2628 }
2629
2630 static void __init ibm_handle_init(char *name,
2631 acpi_handle * handle, acpi_handle parent,
2632 char **paths, int num_paths, char **path)
2633 {
2634 int i;
2635 acpi_status status;
2636
2637 for (i = 0; i < num_paths; i++) {
2638 status = acpi_get_handle(parent, paths[i], handle);
2639 if (ACPI_SUCCESS(status)) {
2640 *path = paths[i];
2641 return;
2642 }
2643 }
2644
2645 *handle = NULL;
2646 }
2647
2648 #define IBM_HANDLE_INIT(object) \
2649 ibm_handle_init(#object, &object##_handle, *object##_parent, \
2650 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
2651
2652 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
2653 {
2654 unsigned int i;
2655
2656 for (i = 0; i < ARRAY_SIZE(ibms); i++)
2657 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2658 if (strlen(val) > sizeof(ibms[i].param) - 2)
2659 return -ENOSPC;
2660 strcpy(ibms[i].param, val);
2661 strcat(ibms[i].param, ",");
2662 return 0;
2663 }
2664
2665 return -EINVAL;
2666 }
2667
2668 #define IBM_PARAM(feature) \
2669 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2670
2671 IBM_PARAM(hotkey);
2672 IBM_PARAM(bluetooth);
2673 IBM_PARAM(video);
2674 IBM_PARAM(light);
2675 #ifdef CONFIG_ACPI_IBM_DOCK
2676 IBM_PARAM(dock);
2677 #endif
2678 #ifdef CONFIG_ACPI_IBM_BAY
2679 IBM_PARAM(bay);
2680 #endif /* CONFIG_ACPI_IBM_BAY */
2681 IBM_PARAM(cmos);
2682 IBM_PARAM(led);
2683 IBM_PARAM(beep);
2684 IBM_PARAM(ecdump);
2685 IBM_PARAM(brightness);
2686 IBM_PARAM(volume);
2687 IBM_PARAM(fan);
2688
2689 static void acpi_ibm_exit(void)
2690 {
2691 int i;
2692
2693 for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2694 ibm_exit(&ibms[i]);
2695
2696 if (proc_dir)
2697 remove_proc_entry(IBM_DIR, acpi_root_dir);
2698
2699 if (ibm_thinkpad_ec_found)
2700 kfree(ibm_thinkpad_ec_found);
2701 }
2702
2703 static char* __init check_dmi_for_ec(void)
2704 {
2705 struct dmi_device *dev = NULL;
2706 char ec_fw_string[18];
2707
2708 /*
2709 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2710 * X32 or newer, all Z series; Some models must have an
2711 * up-to-date BIOS or they will not be detected.
2712 *
2713 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2714 */
2715 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2716 if (sscanf(dev->name,
2717 "IBM ThinkPad Embedded Controller -[%17c",
2718 ec_fw_string) == 1) {
2719 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2720 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2721 return kstrdup(ec_fw_string, GFP_KERNEL);
2722 }
2723 }
2724 return NULL;
2725 }
2726
2727 static int __init acpi_ibm_init(void)
2728 {
2729 int ret, i;
2730
2731 if (acpi_disabled)
2732 return -ENODEV;
2733
2734 if (!acpi_specific_hotkey_enabled) {
2735 printk(IBM_ERR "using generic hotkey driver\n");
2736 return -ENODEV;
2737 }
2738
2739 /* ec is required because many other handles are relative to it */
2740 IBM_HANDLE_INIT(ec);
2741 if (!ec_handle) {
2742 printk(IBM_ERR "ec object not found\n");
2743 return -ENODEV;
2744 }
2745
2746 /* Models with newer firmware report the EC in DMI */
2747 ibm_thinkpad_ec_found = check_dmi_for_ec();
2748
2749 /* these handles are not required */
2750 IBM_HANDLE_INIT(vid);
2751 IBM_HANDLE_INIT(vid2);
2752 IBM_HANDLE_INIT(ledb);
2753 IBM_HANDLE_INIT(led);
2754 IBM_HANDLE_INIT(hkey);
2755 IBM_HANDLE_INIT(lght);
2756 IBM_HANDLE_INIT(cmos);
2757 #ifdef CONFIG_ACPI_IBM_DOCK
2758 IBM_HANDLE_INIT(dock);
2759 #endif
2760 IBM_HANDLE_INIT(pci);
2761 #ifdef CONFIG_ACPI_IBM_BAY
2762 IBM_HANDLE_INIT(bay);
2763 if (bay_handle)
2764 IBM_HANDLE_INIT(bay_ej);
2765 IBM_HANDLE_INIT(bay2);
2766 if (bay2_handle)
2767 IBM_HANDLE_INIT(bay2_ej);
2768 #endif /* CONFIG_ACPI_IBM_BAY */
2769 IBM_HANDLE_INIT(beep);
2770 IBM_HANDLE_INIT(ecrd);
2771 IBM_HANDLE_INIT(ecwr);
2772 IBM_HANDLE_INIT(fans);
2773 IBM_HANDLE_INIT(gfan);
2774 IBM_HANDLE_INIT(sfan);
2775
2776 proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2777 if (!proc_dir) {
2778 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2779 acpi_ibm_exit();
2780 return -ENODEV;
2781 }
2782 proc_dir->owner = THIS_MODULE;
2783
2784 for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2785 ret = ibm_init(&ibms[i]);
2786 if (ret >= 0 && *ibms[i].param)
2787 ret = ibms[i].write(ibms[i].param);
2788 if (ret < 0) {
2789 acpi_ibm_exit();
2790 return ret;
2791 }
2792 }
2793
2794 return 0;
2795 }
2796
2797 module_init(acpi_ibm_init);
2798 module_exit(acpi_ibm_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree