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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / acpi / ibm_acpi.c
blobc6144ca6663861529a65d1f7f5c5d618be1f43f3
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 <asm/uaccess.h>
90
91 #include <linux/dmi.h>
92 #include <linux/jiffies.h>
93 #include <linux/workqueue.h>
94
95 #include <acpi/acpi_drivers.h>
96 #include <acpi/acnamesp.h>
97
98 #define IBM_NAME "ibm"
99 #define IBM_DESC "IBM ThinkPad ACPI Extras"
100 #define IBM_FILE "ibm_acpi"
101 #define IBM_URL "http://ibm-acpi.sf.net/"
102
103 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
104 MODULE_DESCRIPTION(IBM_DESC);
105 MODULE_VERSION(IBM_VERSION);
106 MODULE_LICENSE("GPL");
107
108 #define IBM_DIR IBM_NAME
109
110 #define IBM_LOG IBM_FILE ": "
111 #define IBM_ERR KERN_ERR IBM_LOG
112 #define IBM_NOTICE KERN_NOTICE IBM_LOG
113 #define IBM_INFO KERN_INFO IBM_LOG
114 #define IBM_DEBUG KERN_DEBUG IBM_LOG
115
116 #define IBM_MAX_ACPI_ARGS 3
117
118 #define __unused __attribute__ ((unused))
119
120 static int experimental;
121 module_param(experimental, int, 0);
122
123 static acpi_handle root_handle = NULL;
124
125 #define IBM_HANDLE(object, parent, paths...) \
126 static acpi_handle object##_handle; \
127 static acpi_handle *object##_parent = &parent##_handle; \
128 static char *object##_path; \
129 static char *object##_paths[] = { paths }
130
131 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
132 "\\_SB.PCI.ISA.EC", /* 570 */
133 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
134 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
135 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
136 "\\_SB.PCI0.ICH3.EC0", /* R31 */
137 "\\_SB.PCI0.LPC.EC", /* all others */
138 );
139
140 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
141 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
142 "\\_SB.PCI0.VID0", /* 770e */
143 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
144 "\\_SB.PCI0.AGP.VID", /* all others */
145 ); /* R30, R31 */
146
147 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
148
149 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
150 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
151 "\\CMS", /* R40, R40e */
152 ); /* all others */
153 #ifdef CONFIG_ACPI_IBM_DOCK
154 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
155 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
156 "\\_SB.PCI0.PCI1.DOCK", /* all others */
157 "\\_SB.PCI.ISA.SLCE", /* 570 */
158 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
159 #endif
160 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
161 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
162 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
163 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
164 ); /* A21e, R30, R31 */
165
166 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
167 "_EJ0", /* all others */
168 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
169
170 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
171 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
172 ); /* all others */
173
174 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
175 "_EJ0", /* 770x */
176 ); /* all others */
177
178 /* don't list other alternatives as we install a notify handler on the 570 */
179 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
180
181 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
182 "^HKEY", /* R30, R31 */
183 "HKEY", /* all others */
184 ); /* 570 */
185
186 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
187 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
188
189 IBM_HANDLE(led, ec, "SLED", /* 570 */
190 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
191 "LED", /* all others */
192 ); /* R30, R31 */
193
194 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
195 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
196 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
197 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
198
199 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
200 "\\FSPD", /* 600e/x, 770e, 770x */
201 ); /* all others */
202
203 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
204 "JFNS", /* 770x-JL */
205 ); /* all others */
206
207 #define IBM_HKEY_HID "IBM0068"
208 #define IBM_PCI_HID "PNP0A03"
209
210 enum thermal_access_mode {
211 IBMACPI_THERMAL_NONE = 0, /* No thermal support */
212 IBMACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
213 IBMACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
214 IBMACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
215 IBMACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
216 };
217
218 #define IBMACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
219 struct ibm_thermal_sensors_struct {
220 s32 temp[IBMACPI_MAX_THERMAL_SENSORS];
221 };
222
223 /*
224 * FAN ACCESS MODES
225 *
226 * IBMACPI_FAN_RD_ACPI_GFAN:
227 * ACPI GFAN method: returns fan level
228 *
229 * see IBMACPI_FAN_WR_ACPI_SFAN
230 * EC 0x2f not available if GFAN exists
231 *
232 * IBMACPI_FAN_WR_ACPI_SFAN:
233 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
234 *
235 * EC 0x2f might be available *for reading*, but never for writing.
236 *
237 * IBMACPI_FAN_WR_TPEC:
238 * ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
239 * on almost all ThinkPads
240 *
241 * Fan speed changes of any sort (including those caused by the
242 * disengaged mode) are usually done slowly by the firmware as the
243 * maximum ammount of fan duty cycle change per second seems to be
244 * limited.
245 *
246 * Reading is not available if GFAN exists.
247 * Writing is not available if SFAN exists.
248 *
249 * Bits
250 * 7 automatic mode engaged;
251 * (default operation mode of the ThinkPad)
252 * fan level is ignored in this mode.
253 * 6 disengage mode (takes precedence over bit 7);
254 * not available on all thinkpads. May disable
255 * the tachometer, and speeds up fan to 100% duty-cycle,
256 * which speeds it up far above the standard RPM
257 * levels. It is not impossible that it could cause
258 * hardware damage.
259 * 5-3 unused in some models. Extra bits for fan level
260 * in others, but still useless as all values above
261 * 7 map to the same speed as level 7 in these models.
262 * 2-0 fan level (0..7 usually)
263 * 0x00 = stop
264 * 0x07 = max (set when temperatures critical)
265 * Some ThinkPads may have other levels, see
266 * IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
267 *
268 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
269 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
270 * does so, its initial value is meaningless (0x07).
271 *
272 * For firmware bugs, refer to:
273 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
274 *
275 * ----
276 *
277 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
278 * Main fan tachometer reading (in RPM)
279 *
280 * This register is present on all ThinkPads with a new-style EC, and
281 * it is known not to be present on the A21m/e, and T22, as there is
282 * something else in offset 0x84 according to the ACPI DSDT. Other
283 * ThinkPads from this same time period (and earlier) probably lack the
284 * tachometer as well.
285 *
286 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
287 * was never fixed by IBM to report the EC firmware version string
288 * probably support the tachometer (like the early X models), so
289 * detecting it is quite hard. We need more data to know for sure.
290 *
291 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
292 * might result.
293 *
294 * FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
295 * register is not invalidated in ThinkPads that disable tachometer
296 * readings. Thus, the tachometer readings go stale.
297 *
298 * For firmware bugs, refer to:
299 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
300 *
301 * IBMACPI_FAN_WR_ACPI_FANS:
302 * ThinkPad X31, X40, X41. Not available in the X60.
303 *
304 * FANS ACPI handle: takes three arguments: low speed, medium speed,
305 * high speed. ACPI DSDT seems to map these three speeds to levels
306 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
307 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
308 *
309 * The speeds are stored on handles
310 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
311 *
312 * There are three default speed sets, acessible as handles:
313 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
314 *
315 * ACPI DSDT switches which set is in use depending on various
316 * factors.
317 *
318 * IBMACPI_FAN_WR_TPEC is also available and should be used to
319 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
320 * but the ACPI tables just mention level 7.
321 */
322
323 enum fan_status_access_mode {
324 IBMACPI_FAN_NONE = 0, /* No fan status or control */
325 IBMACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
326 IBMACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
327 };
328
329 enum fan_control_access_mode {
330 IBMACPI_FAN_WR_NONE = 0, /* No fan control */
331 IBMACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
332 IBMACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
333 IBMACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
334 };
335
336 enum fan_control_commands {
337 IBMACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
338 IBMACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
339 IBMACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
340 * and also watchdog cmd */
341 };
342
343 enum { /* Fan control constants */
344 fan_status_offset = 0x2f, /* EC register 0x2f */
345 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
346 * 0x84 must be read before 0x85 */
347
348 IBMACPI_FAN_EC_DISENGAGED = 0x40, /* EC mode: tachometer
349 * disengaged */
350 IBMACPI_FAN_EC_AUTO = 0x80, /* EC mode: auto fan
351 * control */
352 };
353
354 static char *ibm_thinkpad_ec_found = NULL;
355
356 struct ibm_struct {
357 char *name;
358 char param[32];
359
360 char *hid;
361 struct acpi_driver *driver;
362
363 int (*init) (void);
364 int (*read) (char *);
365 int (*write) (char *);
366 void (*exit) (void);
367
368 void (*notify) (struct ibm_struct *, u32);
369 acpi_handle *handle;
370 int type;
371 struct acpi_device *device;
372
373 int driver_registered;
374 int proc_created;
375 int init_called;
376 int notify_installed;
377
378 int experimental;
379 };
380
381 static struct proc_dir_entry *proc_dir = NULL;
382
383 static struct backlight_device *ibm_backlight_device = NULL;
384
385 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
386 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
387 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
388
389 static int acpi_evalf(acpi_handle handle,
390 void *res, char *method, char *fmt, ...)
391 {
392 char *fmt0 = fmt;
393 struct acpi_object_list params;
394 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
395 struct acpi_buffer result, *resultp;
396 union acpi_object out_obj;
397 acpi_status status;
398 va_list ap;
399 char res_type;
400 int success;
401 int quiet;
402
403 if (!*fmt) {
404 printk(IBM_ERR "acpi_evalf() called with empty format\n");
405 return 0;
406 }
407
408 if (*fmt == 'q') {
409 quiet = 1;
410 fmt++;
411 } else
412 quiet = 0;
413
414 res_type = *(fmt++);
415
416 params.count = 0;
417 params.pointer = &in_objs[0];
418
419 va_start(ap, fmt);
420 while (*fmt) {
421 char c = *(fmt++);
422 switch (c) {
423 case 'd': /* int */
424 in_objs[params.count].integer.value = va_arg(ap, int);
425 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
426 break;
427 /* add more types as needed */
428 default:
429 printk(IBM_ERR "acpi_evalf() called "
430 "with invalid format character '%c'\n", c);
431 return 0;
432 }
433 }
434 va_end(ap);
435
436 if (res_type != 'v') {
437 result.length = sizeof(out_obj);
438 result.pointer = &out_obj;
439 resultp = &result;
440 } else
441 resultp = NULL;
442
443 status = acpi_evaluate_object(handle, method, &params, resultp);
444
445 switch (res_type) {
446 case 'd': /* int */
447 if (res)
448 *(int *)res = out_obj.integer.value;
449 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
450 break;
451 case 'v': /* void */
452 success = status == AE_OK;
453 break;
454 /* add more types as needed */
455 default:
456 printk(IBM_ERR "acpi_evalf() called "
457 "with invalid format character '%c'\n", res_type);
458 return 0;
459 }
460
461 if (!success && !quiet)
462 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
463 method, fmt0, status);
464
465 return success;
466 }
467
468 static void __unused acpi_print_int(acpi_handle handle, char *method)
469 {
470 int i;
471
472 if (acpi_evalf(handle, &i, method, "d"))
473 printk(IBM_INFO "%s = 0x%x\n", method, i);
474 else
475 printk(IBM_ERR "error calling %s\n", method);
476 }
477
478 static char *next_cmd(char **cmds)
479 {
480 char *start = *cmds;
481 char *end;
482
483 while ((end = strchr(start, ',')) && end == start)
484 start = end + 1;
485
486 if (!end)
487 return NULL;
488
489 *end = 0;
490 *cmds = end + 1;
491 return start;
492 }
493
494 static int ibm_acpi_driver_init(void)
495 {
496 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
497 printk(IBM_INFO "%s\n", IBM_URL);
498
499 return 0;
500 }
501
502 static int driver_read(char *p)
503 {
504 int len = 0;
505
506 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
507 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
508
509 return len;
510 }
511
512 static int hotkey_supported;
513 static int hotkey_mask_supported;
514 static int hotkey_orig_status;
515 static int hotkey_orig_mask;
516
517 static int hotkey_get(int *status, int *mask)
518 {
519 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
520 return 0;
521
522 if (hotkey_mask_supported)
523 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
524 return 0;
525
526 return 1;
527 }
528
529 static int hotkey_set(int status, int mask)
530 {
531 int i;
532
533 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
534 return 0;
535
536 if (hotkey_mask_supported)
537 for (i = 0; i < 32; i++) {
538 int bit = ((1 << i) & mask) != 0;
539 if (!acpi_evalf(hkey_handle,
540 NULL, "MHKM", "vdd", i + 1, bit))
541 return 0;
542 }
543
544 return 1;
545 }
546
547 static int hotkey_init(void)
548 {
549 /* hotkey not supported on 570 */
550 hotkey_supported = hkey_handle != NULL;
551
552 if (hotkey_supported) {
553 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
554 A30, R30, R31, T20-22, X20-21, X22-24 */
555 hotkey_mask_supported =
556 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
557
558 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
559 return -ENODEV;
560 }
561
562 return 0;
563 }
564
565 static int hotkey_read(char *p)
566 {
567 int status, mask;
568 int len = 0;
569
570 if (!hotkey_supported) {
571 len += sprintf(p + len, "status:\t\tnot supported\n");
572 return len;
573 }
574
575 if (!hotkey_get(&status, &mask))
576 return -EIO;
577
578 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
579 if (hotkey_mask_supported) {
580 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
581 len += sprintf(p + len,
582 "commands:\tenable, disable, reset, <mask>\n");
583 } else {
584 len += sprintf(p + len, "mask:\t\tnot supported\n");
585 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
586 }
587
588 return len;
589 }
590
591 static int hotkey_write(char *buf)
592 {
593 int status, mask;
594 char *cmd;
595 int do_cmd = 0;
596
597 if (!hotkey_supported)
598 return -ENODEV;
599
600 if (!hotkey_get(&status, &mask))
601 return -EIO;
602
603 while ((cmd = next_cmd(&buf))) {
604 if (strlencmp(cmd, "enable") == 0) {
605 status = 1;
606 } else if (strlencmp(cmd, "disable") == 0) {
607 status = 0;
608 } else if (strlencmp(cmd, "reset") == 0) {
609 status = hotkey_orig_status;
610 mask = hotkey_orig_mask;
611 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
612 /* mask set */
613 } else if (sscanf(cmd, "%x", &mask) == 1) {
614 /* mask set */
615 } else
616 return -EINVAL;
617 do_cmd = 1;
618 }
619
620 if (do_cmd && !hotkey_set(status, mask))
621 return -EIO;
622
623 return 0;
624 }
625
626 static void hotkey_exit(void)
627 {
628 if (hotkey_supported)
629 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
630 }
631
632 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
633 {
634 int hkey;
635
636 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
637 acpi_bus_generate_event(ibm->device, event, hkey);
638 else {
639 printk(IBM_ERR "unknown hotkey event %d\n", event);
640 acpi_bus_generate_event(ibm->device, event, 0);
641 }
642 }
643
644 static int bluetooth_supported;
645
646 static int bluetooth_init(void)
647 {
648 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
649 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
650 bluetooth_supported = hkey_handle &&
651 acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
652
653 return 0;
654 }
655
656 static int bluetooth_status(void)
657 {
658 int status;
659
660 if (!bluetooth_supported ||
661 !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
662 status = 0;
663
664 return status;
665 }
666
667 static int bluetooth_read(char *p)
668 {
669 int len = 0;
670 int status = bluetooth_status();
671
672 if (!bluetooth_supported)
673 len += sprintf(p + len, "status:\t\tnot supported\n");
674 else if (!(status & 1))
675 len += sprintf(p + len, "status:\t\tnot installed\n");
676 else {
677 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
678 len += sprintf(p + len, "commands:\tenable, disable\n");
679 }
680
681 return len;
682 }
683
684 static int bluetooth_write(char *buf)
685 {
686 int status = bluetooth_status();
687 char *cmd;
688 int do_cmd = 0;
689
690 if (!bluetooth_supported)
691 return -ENODEV;
692
693 while ((cmd = next_cmd(&buf))) {
694 if (strlencmp(cmd, "enable") == 0) {
695 status |= 2;
696 } else if (strlencmp(cmd, "disable") == 0) {
697 status &= ~2;
698 } else
699 return -EINVAL;
700 do_cmd = 1;
701 }
702
703 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
704 return -EIO;
705
706 return 0;
707 }
708
709 static int wan_supported;
710
711 static int wan_init(void)
712 {
713 wan_supported = hkey_handle &&
714 acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
715
716 return 0;
717 }
718
719 static int wan_status(void)
720 {
721 int status;
722
723 if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
724 status = 0;
725
726 return status;
727 }
728
729 static int wan_read(char *p)
730 {
731 int len = 0;
732 int status = wan_status();
733
734 if (!wan_supported)
735 len += sprintf(p + len, "status:\t\tnot supported\n");
736 else if (!(status & 1))
737 len += sprintf(p + len, "status:\t\tnot installed\n");
738 else {
739 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
740 len += sprintf(p + len, "commands:\tenable, disable\n");
741 }
742
743 return len;
744 }
745
746 static int wan_write(char *buf)
747 {
748 int status = wan_status();
749 char *cmd;
750 int do_cmd = 0;
751
752 if (!wan_supported)
753 return -ENODEV;
754
755 while ((cmd = next_cmd(&buf))) {
756 if (strlencmp(cmd, "enable") == 0) {
757 status |= 2;
758 } else if (strlencmp(cmd, "disable") == 0) {
759 status &= ~2;
760 } else
761 return -EINVAL;
762 do_cmd = 1;
763 }
764
765 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
766 return -EIO;
767
768 return 0;
769 }
770
771 enum video_access_mode {
772 IBMACPI_VIDEO_NONE = 0,
773 IBMACPI_VIDEO_570, /* 570 */
774 IBMACPI_VIDEO_770, /* 600e/x, 770e, 770x */
775 IBMACPI_VIDEO_NEW, /* all others */
776 };
777
778 static enum video_access_mode video_supported;
779 static int video_orig_autosw;
780
781 static int video_init(void)
782 {
783 int ivga;
784
785 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
786 /* G41, assume IVGA doesn't change */
787 vid_handle = vid2_handle;
788
789 if (!vid_handle)
790 /* video switching not supported on R30, R31 */
791 video_supported = IBMACPI_VIDEO_NONE;
792 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
793 /* 570 */
794 video_supported = IBMACPI_VIDEO_570;
795 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
796 /* 600e/x, 770e, 770x */
797 video_supported = IBMACPI_VIDEO_770;
798 else
799 /* all others */
800 video_supported = IBMACPI_VIDEO_NEW;
801
802 return 0;
803 }
804
805 static int video_status(void)
806 {
807 int status = 0;
808 int i;
809
810 if (video_supported == IBMACPI_VIDEO_570) {
811 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
812 status = i & 3;
813 } else if (video_supported == IBMACPI_VIDEO_770) {
814 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
815 status |= 0x01 * i;
816 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
817 status |= 0x02 * i;
818 } else if (video_supported == IBMACPI_VIDEO_NEW) {
819 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
820 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
821 status |= 0x02 * i;
822
823 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
824 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
825 status |= 0x01 * i;
826 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
827 status |= 0x08 * i;
828 }
829
830 return status;
831 }
832
833 static int video_autosw(void)
834 {
835 int autosw = 0;
836
837 if (video_supported == IBMACPI_VIDEO_570)
838 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
839 else if (video_supported == IBMACPI_VIDEO_770 ||
840 video_supported == IBMACPI_VIDEO_NEW)
841 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
842
843 return autosw & 1;
844 }
845
846 static int video_read(char *p)
847 {
848 int status = video_status();
849 int autosw = video_autosw();
850 int len = 0;
851
852 if (!video_supported) {
853 len += sprintf(p + len, "status:\t\tnot supported\n");
854 return len;
855 }
856
857 len += sprintf(p + len, "status:\t\tsupported\n");
858 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
859 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
860 if (video_supported == IBMACPI_VIDEO_NEW)
861 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
862 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
863 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
864 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
865 if (video_supported == IBMACPI_VIDEO_NEW)
866 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
867 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
868 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
869
870 return len;
871 }
872
873 static int video_switch(void)
874 {
875 int autosw = video_autosw();
876 int ret;
877
878 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
879 return -EIO;
880 ret = video_supported == IBMACPI_VIDEO_570 ?
881 acpi_evalf(ec_handle, NULL, "_Q16", "v") :
882 acpi_evalf(vid_handle, NULL, "VSWT", "v");
883 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
884
885 return ret;
886 }
887
888 static int video_expand(void)
889 {
890 if (video_supported == IBMACPI_VIDEO_570)
891 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
892 else if (video_supported == IBMACPI_VIDEO_770)
893 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
894 else
895 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
896 }
897
898 static int video_switch2(int status)
899 {
900 int ret;
901
902 if (video_supported == IBMACPI_VIDEO_570) {
903 ret = acpi_evalf(NULL, NULL,
904 "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
905 } else if (video_supported == IBMACPI_VIDEO_770) {
906 int autosw = video_autosw();
907 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
908 return -EIO;
909
910 ret = acpi_evalf(vid_handle, NULL,
911 "ASWT", "vdd", status * 0x100, 0);
912
913 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
914 } else {
915 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
916 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
917 }
918
919 return ret;
920 }
921
922 static int video_write(char *buf)
923 {
924 char *cmd;
925 int enable, disable, status;
926
927 if (!video_supported)
928 return -ENODEV;
929
930 enable = disable = 0;
931
932 while ((cmd = next_cmd(&buf))) {
933 if (strlencmp(cmd, "lcd_enable") == 0) {
934 enable |= 0x01;
935 } else if (strlencmp(cmd, "lcd_disable") == 0) {
936 disable |= 0x01;
937 } else if (strlencmp(cmd, "crt_enable") == 0) {
938 enable |= 0x02;
939 } else if (strlencmp(cmd, "crt_disable") == 0) {
940 disable |= 0x02;
941 } else if (video_supported == IBMACPI_VIDEO_NEW &&
942 strlencmp(cmd, "dvi_enable") == 0) {
943 enable |= 0x08;
944 } else if (video_supported == IBMACPI_VIDEO_NEW &&
945 strlencmp(cmd, "dvi_disable") == 0) {
946 disable |= 0x08;
947 } else if (strlencmp(cmd, "auto_enable") == 0) {
948 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
949 return -EIO;
950 } else if (strlencmp(cmd, "auto_disable") == 0) {
951 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
952 return -EIO;
953 } else if (strlencmp(cmd, "video_switch") == 0) {
954 if (!video_switch())
955 return -EIO;
956 } else if (strlencmp(cmd, "expand_toggle") == 0) {
957 if (!video_expand())
958 return -EIO;
959 } else
960 return -EINVAL;
961 }
962
963 if (enable || disable) {
964 status = (video_status() & 0x0f & ~disable) | enable;
965 if (!video_switch2(status))
966 return -EIO;
967 }
968
969 return 0;
970 }
971
972 static void video_exit(void)
973 {
974 acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
975 }
976
977 static int light_supported;
978 static int light_status_supported;
979
980 static int light_init(void)
981 {
982 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
983 light_supported = (cmos_handle || lght_handle) && !ledb_handle;
984
985 if (light_supported)
986 /* light status not supported on
987 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
988 light_status_supported = acpi_evalf(ec_handle, NULL,
989 "KBLT", "qv");
990
991 return 0;
992 }
993
994 static int light_read(char *p)
995 {
996 int len = 0;
997 int status = 0;
998
999 if (!light_supported) {
1000 len += sprintf(p + len, "status:\t\tnot supported\n");
1001 } else if (!light_status_supported) {
1002 len += sprintf(p + len, "status:\t\tunknown\n");
1003 len += sprintf(p + len, "commands:\ton, off\n");
1004 } else {
1005 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1006 return -EIO;
1007 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1008 len += sprintf(p + len, "commands:\ton, off\n");
1009 }
1010
1011 return len;
1012 }
1013
1014 static int light_write(char *buf)
1015 {
1016 int cmos_cmd, lght_cmd;
1017 char *cmd;
1018 int success;
1019
1020 if (!light_supported)
1021 return -ENODEV;
1022
1023 while ((cmd = next_cmd(&buf))) {
1024 if (strlencmp(cmd, "on") == 0) {
1025 cmos_cmd = 0x0c;
1026 lght_cmd = 1;
1027 } else if (strlencmp(cmd, "off") == 0) {
1028 cmos_cmd = 0x0d;
1029 lght_cmd = 0;
1030 } else
1031 return -EINVAL;
1032
1033 success = cmos_handle ?
1034 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1035 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1036 if (!success)
1037 return -EIO;
1038 }
1039
1040 return 0;
1041 }
1042
1043 static int _sta(acpi_handle handle)
1044 {
1045 int status;
1046
1047 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
1048 status = 0;
1049
1050 return status;
1051 }
1052
1053 #ifdef CONFIG_ACPI_IBM_DOCK
1054 #define dock_docked() (_sta(dock_handle) & 1)
1055
1056 static int dock_read(char *p)
1057 {
1058 int len = 0;
1059 int docked = dock_docked();
1060
1061 if (!dock_handle)
1062 len += sprintf(p + len, "status:\t\tnot supported\n");
1063 else if (!docked)
1064 len += sprintf(p + len, "status:\t\tundocked\n");
1065 else {
1066 len += sprintf(p + len, "status:\t\tdocked\n");
1067 len += sprintf(p + len, "commands:\tdock, undock\n");
1068 }
1069
1070 return len;
1071 }
1072
1073 static int dock_write(char *buf)
1074 {
1075 char *cmd;
1076
1077 if (!dock_docked())
1078 return -ENODEV;
1079
1080 while ((cmd = next_cmd(&buf))) {
1081 if (strlencmp(cmd, "undock") == 0) {
1082 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1083 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1084 return -EIO;
1085 } else if (strlencmp(cmd, "dock") == 0) {
1086 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1087 return -EIO;
1088 } else
1089 return -EINVAL;
1090 }
1091
1092 return 0;
1093 }
1094
1095 static void dock_notify(struct ibm_struct *ibm, u32 event)
1096 {
1097 int docked = dock_docked();
1098 int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1099
1100 if (event == 1 && !pci) /* 570 */
1101 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1102 else if (event == 1 && pci) /* 570 */
1103 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1104 else if (event == 3 && docked)
1105 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1106 else if (event == 3 && !docked)
1107 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1108 else if (event == 0 && docked)
1109 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1110 else {
1111 printk(IBM_ERR "unknown dock event %d, status %d\n",
1112 event, _sta(dock_handle));
1113 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1114 }
1115 }
1116 #endif
1117
1118 static int bay_status_supported;
1119 static int bay_status2_supported;
1120 static int bay_eject_supported;
1121 static int bay_eject2_supported;
1122
1123 static int bay_init(void)
1124 {
1125 bay_status_supported = bay_handle &&
1126 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1127 bay_status2_supported = bay2_handle &&
1128 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1129
1130 bay_eject_supported = bay_handle && bay_ej_handle &&
1131 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1132 bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1133 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1134
1135 return 0;
1136 }
1137
1138 #define bay_occupied(b) (_sta(b##_handle) & 1)
1139
1140 static int bay_read(char *p)
1141 {
1142 int len = 0;
1143 int occupied = bay_occupied(bay);
1144 int occupied2 = bay_occupied(bay2);
1145 int eject, eject2;
1146
1147 len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1148 (occupied ? "occupied" : "unoccupied") :
1149 "not supported");
1150 if (bay_status2_supported)
1151 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1152 "occupied" : "unoccupied");
1153
1154 eject = bay_eject_supported && occupied;
1155 eject2 = bay_eject2_supported && occupied2;
1156
1157 if (eject && eject2)
1158 len += sprintf(p + len, "commands:\teject, eject2\n");
1159 else if (eject)
1160 len += sprintf(p + len, "commands:\teject\n");
1161 else if (eject2)
1162 len += sprintf(p + len, "commands:\teject2\n");
1163
1164 return len;
1165 }
1166
1167 static int bay_write(char *buf)
1168 {
1169 char *cmd;
1170
1171 if (!bay_eject_supported && !bay_eject2_supported)
1172 return -ENODEV;
1173
1174 while ((cmd = next_cmd(&buf))) {
1175 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1176 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1177 return -EIO;
1178 } else if (bay_eject2_supported &&
1179 strlencmp(cmd, "eject2") == 0) {
1180 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1181 return -EIO;
1182 } else
1183 return -EINVAL;
1184 }
1185
1186 return 0;
1187 }
1188
1189 static void bay_notify(struct ibm_struct *ibm, u32 event)
1190 {
1191 acpi_bus_generate_event(ibm->device, event, 0);
1192 }
1193
1194 static int cmos_read(char *p)
1195 {
1196 int len = 0;
1197
1198 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1199 R30, R31, T20-22, X20-21 */
1200 if (!cmos_handle)
1201 len += sprintf(p + len, "status:\t\tnot supported\n");
1202 else {
1203 len += sprintf(p + len, "status:\t\tsupported\n");
1204 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1205 }
1206
1207 return len;
1208 }
1209
1210 static int cmos_eval(int cmos_cmd)
1211 {
1212 if (cmos_handle)
1213 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1214 else
1215 return 1;
1216 }
1217
1218 static int cmos_write(char *buf)
1219 {
1220 char *cmd;
1221 int cmos_cmd;
1222
1223 if (!cmos_handle)
1224 return -EINVAL;
1225
1226 while ((cmd = next_cmd(&buf))) {
1227 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1228 cmos_cmd >= 0 && cmos_cmd <= 21) {
1229 /* cmos_cmd set */
1230 } else
1231 return -EINVAL;
1232
1233 if (!cmos_eval(cmos_cmd))
1234 return -EIO;
1235 }
1236
1237 return 0;
1238 }
1239
1240 enum led_access_mode {
1241 IBMACPI_LED_NONE = 0,
1242 IBMACPI_LED_570, /* 570 */
1243 IBMACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1244 IBMACPI_LED_NEW, /* all others */
1245 };
1246 static enum led_access_mode led_supported;
1247
1248 static int led_init(void)
1249 {
1250 if (!led_handle)
1251 /* led not supported on R30, R31 */
1252 led_supported = IBMACPI_LED_NONE;
1253 else if (strlencmp(led_path, "SLED") == 0)
1254 /* 570 */
1255 led_supported = IBMACPI_LED_570;
1256 else if (strlencmp(led_path, "SYSL") == 0)
1257 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1258 led_supported = IBMACPI_LED_OLD;
1259 else
1260 /* all others */
1261 led_supported = IBMACPI_LED_NEW;
1262
1263 return 0;
1264 }
1265
1266 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1267
1268 static int led_read(char *p)
1269 {
1270 int len = 0;
1271
1272 if (!led_supported) {
1273 len += sprintf(p + len, "status:\t\tnot supported\n");
1274 return len;
1275 }
1276 len += sprintf(p + len, "status:\t\tsupported\n");
1277
1278 if (led_supported == IBMACPI_LED_570) {
1279 /* 570 */
1280 int i, status;
1281 for (i = 0; i < 8; i++) {
1282 if (!acpi_evalf(ec_handle,
1283 &status, "GLED", "dd", 1 << i))
1284 return -EIO;
1285 len += sprintf(p + len, "%d:\t\t%s\n",
1286 i, led_status(status));
1287 }
1288 }
1289
1290 len += sprintf(p + len, "commands:\t"
1291 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1292
1293 return len;
1294 }
1295
1296 /* off, on, blink */
1297 static const int led_sled_arg1[] = { 0, 1, 3 };
1298 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1299 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1300 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1301
1302 #define EC_HLCL 0x0c
1303 #define EC_HLBL 0x0d
1304 #define EC_HLMS 0x0e
1305
1306 static int led_write(char *buf)
1307 {
1308 char *cmd;
1309 int led, ind, ret;
1310
1311 if (!led_supported)
1312 return -ENODEV;
1313
1314 while ((cmd = next_cmd(&buf))) {
1315 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1316 return -EINVAL;
1317
1318 if (strstr(cmd, "off")) {
1319 ind = 0;
1320 } else if (strstr(cmd, "on")) {
1321 ind = 1;
1322 } else if (strstr(cmd, "blink")) {
1323 ind = 2;
1324 } else
1325 return -EINVAL;
1326
1327 if (led_supported == IBMACPI_LED_570) {
1328 /* 570 */
1329 led = 1 << led;
1330 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1331 led, led_sled_arg1[ind]))
1332 return -EIO;
1333 } else if (led_supported == IBMACPI_LED_OLD) {
1334 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1335 led = 1 << led;
1336 ret = ec_write(EC_HLMS, led);
1337 if (ret >= 0)
1338 ret =
1339 ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
1340 if (ret >= 0)
1341 ret =
1342 ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
1343 if (ret < 0)
1344 return ret;
1345 } else {
1346 /* all others */
1347 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1348 led, led_led_arg1[ind]))
1349 return -EIO;
1350 }
1351 }
1352
1353 return 0;
1354 }
1355
1356 static int beep_read(char *p)
1357 {
1358 int len = 0;
1359
1360 if (!beep_handle)
1361 len += sprintf(p + len, "status:\t\tnot supported\n");
1362 else {
1363 len += sprintf(p + len, "status:\t\tsupported\n");
1364 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1365 }
1366
1367 return len;
1368 }
1369
1370 static int beep_write(char *buf)
1371 {
1372 char *cmd;
1373 int beep_cmd;
1374
1375 if (!beep_handle)
1376 return -ENODEV;
1377
1378 while ((cmd = next_cmd(&buf))) {
1379 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1380 beep_cmd >= 0 && beep_cmd <= 17) {
1381 /* beep_cmd set */
1382 } else
1383 return -EINVAL;
1384 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1385 return -EIO;
1386 }
1387
1388 return 0;
1389 }
1390
1391 static int acpi_ec_read(int i, u8 * p)
1392 {
1393 int v;
1394
1395 if (ecrd_handle) {
1396 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1397 return 0;
1398 *p = v;
1399 } else {
1400 if (ec_read(i, p) < 0)
1401 return 0;
1402 }
1403
1404 return 1;
1405 }
1406
1407 static int acpi_ec_write(int i, u8 v)
1408 {
1409 if (ecwr_handle) {
1410 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1411 return 0;
1412 } else {
1413 if (ec_write(i, v) < 0)
1414 return 0;
1415 }
1416
1417 return 1;
1418 }
1419
1420 static enum thermal_access_mode thermal_read_mode;
1421
1422 static int thermal_init(void)
1423 {
1424 u8 t, ta1, ta2;
1425 int i;
1426 int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1427
1428 if (ibm_thinkpad_ec_found && experimental) {
1429 /*
1430 * Direct EC access mode: sensors at registers
1431 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1432 * non-implemented, thermal sensors return 0x80 when
1433 * not available
1434 */
1435
1436 ta1 = ta2 = 0;
1437 for (i = 0; i < 8; i++) {
1438 if (likely(acpi_ec_read(0x78 + i, &t))) {
1439 ta1 |= t;
1440 } else {
1441 ta1 = 0;
1442 break;
1443 }
1444 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1445 ta2 |= t;
1446 } else {
1447 ta1 = 0;
1448 break;
1449 }
1450 }
1451 if (ta1 == 0) {
1452 /* This is sheer paranoia, but we handle it anyway */
1453 if (acpi_tmp7) {
1454 printk(IBM_ERR
1455 "ThinkPad ACPI EC access misbehaving, "
1456 "falling back to ACPI TMPx access mode\n");
1457 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1458 } else {
1459 printk(IBM_ERR
1460 "ThinkPad ACPI EC access misbehaving, "
1461 "disabling thermal sensors access\n");
1462 thermal_read_mode = IBMACPI_THERMAL_NONE;
1463 }
1464 } else {
1465 thermal_read_mode =
1466 (ta2 != 0) ?
1467 IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
1468 }
1469 } else if (acpi_tmp7) {
1470 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1471 /* 600e/x, 770e, 770x */
1472 thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
1473 } else {
1474 /* Standard ACPI TMPx access, max 8 sensors */
1475 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1476 }
1477 } else {
1478 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1479 thermal_read_mode = IBMACPI_THERMAL_NONE;
1480 }
1481
1482 return 0;
1483 }
1484
1485 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1486 {
1487 int i, t;
1488 s8 tmp;
1489 char tmpi[] = "TMPi";
1490
1491 if (!s)
1492 return -EINVAL;
1493
1494 switch (thermal_read_mode) {
1495 #if IBMACPI_MAX_THERMAL_SENSORS >= 16
1496 case IBMACPI_THERMAL_TPEC_16:
1497 for (i = 0; i < 8; i++) {
1498 if (!acpi_ec_read(0xC0 + i, &tmp))
1499 return -EIO;
1500 s->temp[i + 8] = tmp * 1000;
1501 }
1502 /* fallthrough */
1503 #endif
1504 case IBMACPI_THERMAL_TPEC_8:
1505 for (i = 0; i < 8; i++) {
1506 if (!acpi_ec_read(0x78 + i, &tmp))
1507 return -EIO;
1508 s->temp[i] = tmp * 1000;
1509 }
1510 return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
1511
1512 case IBMACPI_THERMAL_ACPI_UPDT:
1513 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1514 return -EIO;
1515 for (i = 0; i < 8; i++) {
1516 tmpi[3] = '0' + i;
1517 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1518 return -EIO;
1519 s->temp[i] = (t - 2732) * 100;
1520 }
1521 return 8;
1522
1523 case IBMACPI_THERMAL_ACPI_TMP07:
1524 for (i = 0; i < 8; i++) {
1525 tmpi[3] = '0' + i;
1526 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1527 return -EIO;
1528 s->temp[i] = t * 1000;
1529 }
1530 return 8;
1531
1532 case IBMACPI_THERMAL_NONE:
1533 default:
1534 return 0;
1535 }
1536 }
1537
1538 static int thermal_read(char *p)
1539 {
1540 int len = 0;
1541 int n, i;
1542 struct ibm_thermal_sensors_struct t;
1543
1544 n = thermal_get_sensors(&t);
1545 if (unlikely(n < 0))
1546 return n;
1547
1548 len += sprintf(p + len, "temperatures:\t");
1549
1550 if (n > 0) {
1551 for (i = 0; i < (n - 1); i++)
1552 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1553 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1554 } else
1555 len += sprintf(p + len, "not supported\n");
1556
1557 return len;
1558 }
1559
1560 static u8 ecdump_regs[256];
1561
1562 static int ecdump_read(char *p)
1563 {
1564 int len = 0;
1565 int i, j;
1566 u8 v;
1567
1568 len += sprintf(p + len, "EC "
1569 " +00 +01 +02 +03 +04 +05 +06 +07"
1570 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1571 for (i = 0; i < 256; i += 16) {
1572 len += sprintf(p + len, "EC 0x%02x:", i);
1573 for (j = 0; j < 16; j++) {
1574 if (!acpi_ec_read(i + j, &v))
1575 break;
1576 if (v != ecdump_regs[i + j])
1577 len += sprintf(p + len, " *%02x", v);
1578 else
1579 len += sprintf(p + len, " %02x", v);
1580 ecdump_regs[i + j] = v;
1581 }
1582 len += sprintf(p + len, "\n");
1583 if (j != 16)
1584 break;
1585 }
1586
1587 /* These are way too dangerous to advertise openly... */
1588 #if 0
1589 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1590 " (<offset> is 00-ff, <value> is 00-ff)\n");
1591 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1592 " (<offset> is 00-ff, <value> is 0-255)\n");
1593 #endif
1594 return len;
1595 }
1596
1597 static int ecdump_write(char *buf)
1598 {
1599 char *cmd;
1600 int i, v;
1601
1602 while ((cmd = next_cmd(&buf))) {
1603 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1604 /* i and v set */
1605 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1606 /* i and v set */
1607 } else
1608 return -EINVAL;
1609 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1610 if (!acpi_ec_write(i, v))
1611 return -EIO;
1612 } else
1613 return -EINVAL;
1614 }
1615
1616 return 0;
1617 }
1618
1619 static int brightness_offset = 0x31;
1620
1621 static int brightness_get(struct backlight_device *bd)
1622 {
1623 u8 level;
1624 if (!acpi_ec_read(brightness_offset, &level))
1625 return -EIO;
1626
1627 level &= 0x7;
1628
1629 return level;
1630 }
1631
1632 static int brightness_read(char *p)
1633 {
1634 int len = 0;
1635 int level;
1636
1637 if ((level = brightness_get(NULL)) < 0) {
1638 len += sprintf(p + len, "level:\t\tunreadable\n");
1639 } else {
1640 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1641 len += sprintf(p + len, "commands:\tup, down\n");
1642 len += sprintf(p + len, "commands:\tlevel <level>"
1643 " (<level> is 0-7)\n");
1644 }
1645
1646 return len;
1647 }
1648
1649 #define BRIGHTNESS_UP 4
1650 #define BRIGHTNESS_DOWN 5
1651
1652 static int brightness_set(int value)
1653 {
1654 int cmos_cmd, inc, i;
1655 int current_value = brightness_get(NULL);
1656
1657 value &= 7;
1658
1659 cmos_cmd = value > current_value ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
1660 inc = value > current_value ? 1 : -1;
1661 for (i = current_value; i != value; i += inc) {
1662 if (!cmos_eval(cmos_cmd))
1663 return -EIO;
1664 if (!acpi_ec_write(brightness_offset, i + inc))
1665 return -EIO;
1666 }
1667
1668 return 0;
1669 }
1670
1671 static int brightness_write(char *buf)
1672 {
1673 int level;
1674 int new_level;
1675 char *cmd;
1676
1677 while ((cmd = next_cmd(&buf))) {
1678 if ((level = brightness_get(NULL)) < 0)
1679 return level;
1680 level &= 7;
1681
1682 if (strlencmp(cmd, "up") == 0) {
1683 new_level = level == 7 ? 7 : level + 1;
1684 } else if (strlencmp(cmd, "down") == 0) {
1685 new_level = level == 0 ? 0 : level - 1;
1686 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1687 new_level >= 0 && new_level <= 7) {
1688 /* new_level set */
1689 } else
1690 return -EINVAL;
1691
1692 brightness_set(new_level);
1693 }
1694
1695 return 0;
1696 }
1697
1698 static int brightness_update_status(struct backlight_device *bd)
1699 {
1700 return brightness_set(bd->props->brightness);
1701 }
1702
1703 static struct backlight_properties ibm_backlight_data = {
1704 .owner = THIS_MODULE,
1705 .get_brightness = brightness_get,
1706 .update_status = brightness_update_status,
1707 .max_brightness = 7,
1708 };
1709
1710 static int brightness_init(void)
1711 {
1712 ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1713 &ibm_backlight_data);
1714 if (IS_ERR(ibm_backlight_device)) {
1715 printk(IBM_ERR "Could not register backlight device\n");
1716 return PTR_ERR(ibm_backlight_device);
1717 }
1718
1719 return 0;
1720 }
1721
1722 static void brightness_exit(void)
1723 {
1724 if (ibm_backlight_device) {
1725 backlight_device_unregister(ibm_backlight_device);
1726 ibm_backlight_device = NULL;
1727 }
1728 }
1729
1730 static int volume_offset = 0x30;
1731
1732 static int volume_read(char *p)
1733 {
1734 int len = 0;
1735 u8 level;
1736
1737 if (!acpi_ec_read(volume_offset, &level)) {
1738 len += sprintf(p + len, "level:\t\tunreadable\n");
1739 } else {
1740 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1741 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1742 len += sprintf(p + len, "commands:\tup, down, mute\n");
1743 len += sprintf(p + len, "commands:\tlevel <level>"
1744 " (<level> is 0-15)\n");
1745 }
1746
1747 return len;
1748 }
1749
1750 #define VOLUME_DOWN 0
1751 #define VOLUME_UP 1
1752 #define VOLUME_MUTE 2
1753
1754 static int volume_write(char *buf)
1755 {
1756 int cmos_cmd, inc, i;
1757 u8 level, mute;
1758 int new_level, new_mute;
1759 char *cmd;
1760
1761 while ((cmd = next_cmd(&buf))) {
1762 if (!acpi_ec_read(volume_offset, &level))
1763 return -EIO;
1764 new_mute = mute = level & 0x40;
1765 new_level = level = level & 0xf;
1766
1767 if (strlencmp(cmd, "up") == 0) {
1768 if (mute)
1769 new_mute = 0;
1770 else
1771 new_level = level == 15 ? 15 : level + 1;
1772 } else if (strlencmp(cmd, "down") == 0) {
1773 if (mute)
1774 new_mute = 0;
1775 else
1776 new_level = level == 0 ? 0 : level - 1;
1777 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1778 new_level >= 0 && new_level <= 15) {
1779 /* new_level set */
1780 } else if (strlencmp(cmd, "mute") == 0) {
1781 new_mute = 0x40;
1782 } else
1783 return -EINVAL;
1784
1785 if (new_level != level) { /* mute doesn't change */
1786 cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1787 inc = new_level > level ? 1 : -1;
1788
1789 if (mute && (!cmos_eval(cmos_cmd) ||
1790 !acpi_ec_write(volume_offset, level)))
1791 return -EIO;
1792
1793 for (i = level; i != new_level; i += inc)
1794 if (!cmos_eval(cmos_cmd) ||
1795 !acpi_ec_write(volume_offset, i + inc))
1796 return -EIO;
1797
1798 if (mute && (!cmos_eval(VOLUME_MUTE) ||
1799 !acpi_ec_write(volume_offset,
1800 new_level + mute)))
1801 return -EIO;
1802 }
1803
1804 if (new_mute != mute) { /* level doesn't change */
1805 cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1806
1807 if (!cmos_eval(cmos_cmd) ||
1808 !acpi_ec_write(volume_offset, level + new_mute))
1809 return -EIO;
1810 }
1811 }
1812
1813 return 0;
1814 }
1815
1816 static enum fan_status_access_mode fan_status_access_mode;
1817 static enum fan_control_access_mode fan_control_access_mode;
1818 static enum fan_control_commands fan_control_commands;
1819
1820 static int fan_control_status_known;
1821 static u8 fan_control_initial_status;
1822
1823 static void fan_watchdog_fire(struct work_struct *ignored);
1824 static int fan_watchdog_maxinterval;
1825 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
1826
1827 static int fan_init(void)
1828 {
1829 fan_status_access_mode = IBMACPI_FAN_NONE;
1830 fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1831 fan_control_commands = 0;
1832 fan_control_status_known = 1;
1833 fan_watchdog_maxinterval = 0;
1834
1835 if (gfan_handle) {
1836 /* 570, 600e/x, 770e, 770x */
1837 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1838 } else {
1839 /* all other ThinkPads: note that even old-style
1840 * ThinkPad ECs supports the fan control register */
1841 if (likely(acpi_ec_read(fan_status_offset,
1842 &fan_control_initial_status))) {
1843 fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1844
1845 /* In some ThinkPads, neither the EC nor the ACPI
1846 * DSDT initialize the fan status, and it ends up
1847 * being set to 0x07 when it *could* be either
1848 * 0x07 or 0x80.
1849 *
1850 * Enable for TP-1Y (T43), TP-78 (R51e),
1851 * TP-76 (R52), TP-70 (T43, R52), which are known
1852 * to be buggy. */
1853 if (fan_control_initial_status == 0x07 &&
1854 ibm_thinkpad_ec_found &&
1855 ((ibm_thinkpad_ec_found[0] == '1' &&
1856 ibm_thinkpad_ec_found[1] == 'Y') ||
1857 (ibm_thinkpad_ec_found[0] == '7' &&
1858 (ibm_thinkpad_ec_found[1] == '6' ||
1859 ibm_thinkpad_ec_found[1] == '8' ||
1860 ibm_thinkpad_ec_found[1] == '0'))
1861 )) {
1862 printk(IBM_NOTICE
1863 "fan_init: initial fan status is "
1864 "unknown, assuming it is in auto "
1865 "mode\n");
1866 fan_control_status_known = 0;
1867 }
1868 } else {
1869 printk(IBM_ERR
1870 "ThinkPad ACPI EC access misbehaving, "
1871 "fan status and control unavailable\n");
1872 return 0;
1873 }
1874 }
1875
1876 if (sfan_handle) {
1877 /* 570, 770x-JL */
1878 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
1879 fan_control_commands |=
1880 IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
1881 } else {
1882 if (!gfan_handle) {
1883 /* gfan without sfan means no fan control */
1884 /* all other models implement TP EC 0x2f control */
1885
1886 if (fans_handle) {
1887 /* X31, X40, X41 */
1888 fan_control_access_mode =
1889 IBMACPI_FAN_WR_ACPI_FANS;
1890 fan_control_commands |=
1891 IBMACPI_FAN_CMD_SPEED |
1892 IBMACPI_FAN_CMD_LEVEL |
1893 IBMACPI_FAN_CMD_ENABLE;
1894 } else {
1895 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
1896 fan_control_commands |=
1897 IBMACPI_FAN_CMD_LEVEL |
1898 IBMACPI_FAN_CMD_ENABLE;
1899 }
1900 }
1901 }
1902
1903 return 0;
1904 }
1905
1906 static int fan_get_status(u8 *status)
1907 {
1908 u8 s;
1909
1910 /* TODO:
1911 * Add IBMACPI_FAN_RD_ACPI_FANS ? */
1912
1913 switch (fan_status_access_mode) {
1914 case IBMACPI_FAN_RD_ACPI_GFAN:
1915 /* 570, 600e/x, 770e, 770x */
1916
1917 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1918 return -EIO;
1919
1920 if (likely(status))
1921 *status = s & 0x07;
1922
1923 break;
1924
1925 case IBMACPI_FAN_RD_TPEC:
1926 /* all except 570, 600e/x, 770e, 770x */
1927 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
1928 return -EIO;
1929
1930 if (likely(status))
1931 *status = s;
1932
1933 break;
1934
1935 default:
1936 return -ENXIO;
1937 }
1938
1939 return 0;
1940 }
1941
1942 static int fan_get_speed(unsigned int *speed)
1943 {
1944 u8 hi, lo;
1945
1946 switch (fan_status_access_mode) {
1947 case IBMACPI_FAN_RD_TPEC:
1948 /* all except 570, 600e/x, 770e, 770x */
1949 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
1950 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
1951 return -EIO;
1952
1953 if (likely(speed))
1954 *speed = (hi << 8) | lo;
1955
1956 break;
1957
1958 default:
1959 return -ENXIO;
1960 }
1961
1962 return 0;
1963 }
1964
1965 static void fan_exit(void)
1966 {
1967 cancel_delayed_work(&fan_watchdog_task);
1968 flush_scheduled_work();
1969 }
1970
1971 static void fan_watchdog_reset(void)
1972 {
1973 static int fan_watchdog_active = 0;
1974
1975 if (fan_watchdog_active)
1976 cancel_delayed_work(&fan_watchdog_task);
1977
1978 if (fan_watchdog_maxinterval > 0) {
1979 fan_watchdog_active = 1;
1980 if (!schedule_delayed_work(&fan_watchdog_task,
1981 msecs_to_jiffies(fan_watchdog_maxinterval
1982 * 1000))) {
1983 printk(IBM_ERR "failed to schedule the fan watchdog, "
1984 "watchdog will not trigger\n");
1985 }
1986 } else
1987 fan_watchdog_active = 0;
1988 }
1989
1990 static int fan_read(char *p)
1991 {
1992 int len = 0;
1993 int rc;
1994 u8 status;
1995 unsigned int speed = 0;
1996
1997 switch (fan_status_access_mode) {
1998 case IBMACPI_FAN_RD_ACPI_GFAN:
1999 /* 570, 600e/x, 770e, 770x */
2000 if ((rc = fan_get_status(&status)) < 0)
2001 return rc;
2002
2003 len += sprintf(p + len, "status:\t\t%s\n"
2004 "level:\t\t%d\n",
2005 (status != 0) ? "enabled" : "disabled", status);
2006 break;
2007
2008 case IBMACPI_FAN_RD_TPEC:
2009 /* all except 570, 600e/x, 770e, 770x */
2010 if ((rc = fan_get_status(&status)) < 0)
2011 return rc;
2012
2013 if (unlikely(!fan_control_status_known)) {
2014 if (status != fan_control_initial_status)
2015 fan_control_status_known = 1;
2016 else
2017 /* Return most likely status. In fact, it
2018 * might be the only possible status */
2019 status = IBMACPI_FAN_EC_AUTO;
2020 }
2021
2022 len += sprintf(p + len, "status:\t\t%s\n",
2023 (status != 0) ? "enabled" : "disabled");
2024
2025 /* No ThinkPad boots on disengaged mode, we can safely
2026 * assume the tachometer is online if fan control status
2027 * was unknown */
2028 if ((rc = fan_get_speed(&speed)) < 0)
2029 return rc;
2030
2031 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2032
2033 if (status & IBMACPI_FAN_EC_DISENGAGED)
2034 /* Disengaged mode takes precedence */
2035 len += sprintf(p + len, "level:\t\tdisengaged\n");
2036 else if (status & IBMACPI_FAN_EC_AUTO)
2037 len += sprintf(p + len, "level:\t\tauto\n");
2038 else
2039 len += sprintf(p + len, "level:\t\t%d\n", status);
2040 break;
2041
2042 case IBMACPI_FAN_NONE:
2043 default:
2044 len += sprintf(p + len, "status:\t\tnot supported\n");
2045 }
2046
2047 if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
2048 len += sprintf(p + len, "commands:\tlevel <level>");
2049
2050 switch (fan_control_access_mode) {
2051 case IBMACPI_FAN_WR_ACPI_SFAN:
2052 len += sprintf(p + len, " (<level> is 0-7)\n");
2053 break;
2054
2055 default:
2056 len += sprintf(p + len, " (<level> is 0-7, "
2057 "auto, disengaged)\n");
2058 break;
2059 }
2060 }
2061
2062 if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
2063 len += sprintf(p + len, "commands:\tenable, disable\n"
2064 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2065 "1-120 (seconds))\n");
2066
2067 if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
2068 len += sprintf(p + len, "commands:\tspeed <speed>"
2069 " (<speed> is 0-65535)\n");
2070
2071 return len;
2072 }
2073
2074 static int fan_set_level(int level)
2075 {
2076 switch (fan_control_access_mode) {
2077 case IBMACPI_FAN_WR_ACPI_SFAN:
2078 if (level >= 0 && level <= 7) {
2079 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2080 return -EIO;
2081 } else
2082 return -EINVAL;
2083 break;
2084
2085 case IBMACPI_FAN_WR_ACPI_FANS:
2086 case IBMACPI_FAN_WR_TPEC:
2087 if ((level != IBMACPI_FAN_EC_AUTO) &&
2088 (level != IBMACPI_FAN_EC_DISENGAGED) &&
2089 ((level < 0) || (level > 7)))
2090 return -EINVAL;
2091
2092 if (!acpi_ec_write(fan_status_offset, level))
2093 return -EIO;
2094 else
2095 fan_control_status_known = 1;
2096 break;
2097
2098 default:
2099 return -ENXIO;
2100 }
2101 return 0;
2102 }
2103
2104 static int fan_set_enable(void)
2105 {
2106 u8 s;
2107 int rc;
2108
2109 switch (fan_control_access_mode) {
2110 case IBMACPI_FAN_WR_ACPI_FANS:
2111 case IBMACPI_FAN_WR_TPEC:
2112 if ((rc = fan_get_status(&s)) < 0)
2113 return rc;
2114
2115 /* Don't go out of emergency fan mode */
2116 if (s != 7)
2117 s = IBMACPI_FAN_EC_AUTO;
2118
2119 if (!acpi_ec_write(fan_status_offset, s))
2120 return -EIO;
2121 else
2122 fan_control_status_known = 1;
2123 break;
2124
2125 case IBMACPI_FAN_WR_ACPI_SFAN:
2126 if ((rc = fan_get_status(&s)) < 0)
2127 return rc;
2128
2129 s &= 0x07;
2130
2131 /* Set fan to at least level 4 */
2132 if (s < 4)
2133 s = 4;
2134
2135 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2136 return -EIO;
2137 break;
2138
2139 default:
2140 return -ENXIO;
2141 }
2142 return 0;
2143 }
2144
2145 static int fan_set_disable(void)
2146 {
2147 switch (fan_control_access_mode) {
2148 case IBMACPI_FAN_WR_ACPI_FANS:
2149 case IBMACPI_FAN_WR_TPEC:
2150 if (!acpi_ec_write(fan_status_offset, 0x00))
2151 return -EIO;
2152 else
2153 fan_control_status_known = 1;
2154 break;
2155
2156 case IBMACPI_FAN_WR_ACPI_SFAN:
2157 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2158 return -EIO;
2159 break;
2160
2161 default:
2162 return -ENXIO;
2163 }
2164 return 0;
2165 }
2166
2167 static int fan_set_speed(int speed)
2168 {
2169 switch (fan_control_access_mode) {
2170 case IBMACPI_FAN_WR_ACPI_FANS:
2171 if (speed >= 0 && speed <= 65535) {
2172 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2173 speed, speed, speed))
2174 return -EIO;
2175 } else
2176 return -EINVAL;
2177 break;
2178
2179 default:
2180 return -ENXIO;
2181 }
2182 return 0;
2183 }
2184
2185 static int fan_write_cmd_level(const char *cmd, int *rc)
2186 {
2187 int level;
2188
2189 if (strlencmp(cmd, "level auto") == 0)
2190 level = IBMACPI_FAN_EC_AUTO;
2191 else if (strlencmp(cmd, "level disengaged") == 0)
2192 level = IBMACPI_FAN_EC_DISENGAGED;
2193 else if (sscanf(cmd, "level %d", &level) != 1)
2194 return 0;
2195
2196 if ((*rc = fan_set_level(level)) == -ENXIO)
2197 printk(IBM_ERR "level command accepted for unsupported "
2198 "access mode %d", fan_control_access_mode);
2199
2200 return 1;
2201 }
2202
2203 static int fan_write_cmd_enable(const char *cmd, int *rc)
2204 {
2205 if (strlencmp(cmd, "enable") != 0)
2206 return 0;
2207
2208 if ((*rc = fan_set_enable()) == -ENXIO)
2209 printk(IBM_ERR "enable command accepted for unsupported "
2210 "access mode %d", fan_control_access_mode);
2211
2212 return 1;
2213 }
2214
2215 static int fan_write_cmd_disable(const char *cmd, int *rc)
2216 {
2217 if (strlencmp(cmd, "disable") != 0)
2218 return 0;
2219
2220 if ((*rc = fan_set_disable()) == -ENXIO)
2221 printk(IBM_ERR "disable command accepted for unsupported "
2222 "access mode %d", fan_control_access_mode);
2223
2224 return 1;
2225 }
2226
2227 static int fan_write_cmd_speed(const char *cmd, int *rc)
2228 {
2229 int speed;
2230
2231 /* TODO:
2232 * Support speed <low> <medium> <high> ? */
2233
2234 if (sscanf(cmd, "speed %d", &speed) != 1)
2235 return 0;
2236
2237 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2238 printk(IBM_ERR "speed command accepted for unsupported "
2239 "access mode %d", fan_control_access_mode);
2240
2241 return 1;
2242 }
2243
2244 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2245 {
2246 int interval;
2247
2248 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2249 return 0;
2250
2251 if (interval < 0 || interval > 120)
2252 *rc = -EINVAL;
2253 else
2254 fan_watchdog_maxinterval = interval;
2255
2256 return 1;
2257 }
2258
2259 static int fan_write(char *buf)
2260 {
2261 char *cmd;
2262 int rc = 0;
2263
2264 while (!rc && (cmd = next_cmd(&buf))) {
2265 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2266 fan_write_cmd_level(cmd, &rc)) &&
2267 !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2268 (fan_write_cmd_enable(cmd, &rc) ||
2269 fan_write_cmd_disable(cmd, &rc) ||
2270 fan_write_cmd_watchdog(cmd, &rc))) &&
2271 !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2272 fan_write_cmd_speed(cmd, &rc))
2273 )
2274 rc = -EINVAL;
2275 else if (!rc)
2276 fan_watchdog_reset();
2277 }
2278
2279 return rc;
2280 }
2281
2282 static void fan_watchdog_fire(struct work_struct *ignored)
2283 {
2284 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2285 if (fan_set_enable()) {
2286 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2287 /* reschedule for later */
2288 fan_watchdog_reset();
2289 }
2290 }
2291
2292 static struct ibm_struct ibms[] = {
2293 {
2294 .name = "driver",
2295 .init = ibm_acpi_driver_init,
2296 .read = driver_read,
2297 },
2298 {
2299 .name = "hotkey",
2300 .hid = IBM_HKEY_HID,
2301 .init = hotkey_init,
2302 .read = hotkey_read,
2303 .write = hotkey_write,
2304 .exit = hotkey_exit,
2305 .notify = hotkey_notify,
2306 .handle = &hkey_handle,
2307 .type = ACPI_DEVICE_NOTIFY,
2308 },
2309 {
2310 .name = "bluetooth",
2311 .init = bluetooth_init,
2312 .read = bluetooth_read,
2313 .write = bluetooth_write,
2314 },
2315 {
2316 .name = "wan",
2317 .init = wan_init,
2318 .read = wan_read,
2319 .write = wan_write,
2320 .experimental = 1,
2321 },
2322 {
2323 .name = "video",
2324 .init = video_init,
2325 .read = video_read,
2326 .write = video_write,
2327 .exit = video_exit,
2328 },
2329 {
2330 .name = "light",
2331 .init = light_init,
2332 .read = light_read,
2333 .write = light_write,
2334 },
2335 #ifdef CONFIG_ACPI_IBM_DOCK
2336 {
2337 .name = "dock",
2338 .read = dock_read,
2339 .write = dock_write,
2340 .notify = dock_notify,
2341 .handle = &dock_handle,
2342 .type = ACPI_SYSTEM_NOTIFY,
2343 },
2344 {
2345 .name = "dock",
2346 .hid = IBM_PCI_HID,
2347 .notify = dock_notify,
2348 .handle = &pci_handle,
2349 .type = ACPI_SYSTEM_NOTIFY,
2350 },
2351 #endif
2352 {
2353 .name = "bay",
2354 .init = bay_init,
2355 .read = bay_read,
2356 .write = bay_write,
2357 .notify = bay_notify,
2358 .handle = &bay_handle,
2359 .type = ACPI_SYSTEM_NOTIFY,
2360 },
2361 {
2362 .name = "cmos",
2363 .read = cmos_read,
2364 .write = cmos_write,
2365 },
2366 {
2367 .name = "led",
2368 .init = led_init,
2369 .read = led_read,
2370 .write = led_write,
2371 },
2372 {
2373 .name = "beep",
2374 .read = beep_read,
2375 .write = beep_write,
2376 },
2377 {
2378 .name = "thermal",
2379 .init = thermal_init,
2380 .read = thermal_read,
2381 },
2382 {
2383 .name = "ecdump",
2384 .read = ecdump_read,
2385 .write = ecdump_write,
2386 .experimental = 1,
2387 },
2388 {
2389 .name = "brightness",
2390 .read = brightness_read,
2391 .write = brightness_write,
2392 .init = brightness_init,
2393 .exit = brightness_exit,
2394 },
2395 {
2396 .name = "volume",
2397 .read = volume_read,
2398 .write = volume_write,
2399 },
2400 {
2401 .name = "fan",
2402 .read = fan_read,
2403 .write = fan_write,
2404 .init = fan_init,
2405 .exit = fan_exit,
2406 .experimental = 1,
2407 },
2408 };
2409
2410 static int dispatch_read(char *page, char **start, off_t off, int count,
2411 int *eof, void *data)
2412 {
2413 struct ibm_struct *ibm = data;
2414 int len;
2415
2416 if (!ibm || !ibm->read)
2417 return -EINVAL;
2418
2419 len = ibm->read(page);
2420 if (len < 0)
2421 return len;
2422
2423 if (len <= off + count)
2424 *eof = 1;
2425 *start = page + off;
2426 len -= off;
2427 if (len > count)
2428 len = count;
2429 if (len < 0)
2430 len = 0;
2431
2432 return len;
2433 }
2434
2435 static int dispatch_write(struct file *file, const char __user * userbuf,
2436 unsigned long count, void *data)
2437 {
2438 struct ibm_struct *ibm = data;
2439 char *kernbuf;
2440 int ret;
2441
2442 if (!ibm || !ibm->write)
2443 return -EINVAL;
2444
2445 kernbuf = kmalloc(count + 2, GFP_KERNEL);
2446 if (!kernbuf)
2447 return -ENOMEM;
2448
2449 if (copy_from_user(kernbuf, userbuf, count)) {
2450 kfree(kernbuf);
2451 return -EFAULT;
2452 }
2453
2454 kernbuf[count] = 0;
2455 strcat(kernbuf, ",");
2456 ret = ibm->write(kernbuf);
2457 if (ret == 0)
2458 ret = count;
2459
2460 kfree(kernbuf);
2461
2462 return ret;
2463 }
2464
2465 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
2466 {
2467 struct ibm_struct *ibm = data;
2468
2469 if (!ibm || !ibm->notify)
2470 return;
2471
2472 ibm->notify(ibm, event);
2473 }
2474
2475 static int __init setup_notify(struct ibm_struct *ibm)
2476 {
2477 acpi_status status;
2478 int ret;
2479
2480 if (!*ibm->handle)
2481 return 0;
2482
2483 ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
2484 if (ret < 0) {
2485 printk(IBM_ERR "%s device not present\n", ibm->name);
2486 return 0;
2487 }
2488
2489 acpi_driver_data(ibm->device) = ibm;
2490 sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
2491
2492 status = acpi_install_notify_handler(*ibm->handle, ibm->type,
2493 dispatch_notify, ibm);
2494 if (ACPI_FAILURE(status)) {
2495 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
2496 ibm->name, status);
2497 return -ENODEV;
2498 }
2499 ibm->notify_installed = 1;
2500 return 0;
2501 }
2502
2503 static int __init ibm_device_add(struct acpi_device *device)
2504 {
2505 return 0;
2506 }
2507
2508 static int __init register_driver(struct ibm_struct *ibm)
2509 {
2510 int ret;
2511
2512 ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
2513 if (!ibm->driver) {
2514 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
2515 return -1;
2516 }
2517
2518 sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
2519 ibm->driver->ids = ibm->hid;
2520 ibm->driver->ops.add = &ibm_device_add;
2521
2522 ret = acpi_bus_register_driver(ibm->driver);
2523 if (ret < 0) {
2524 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
2525 ibm->hid, ret);
2526 kfree(ibm->driver);
2527 }
2528
2529 return ret;
2530 }
2531
2532 static int __init ibm_init(struct ibm_struct *ibm)
2533 {
2534 int ret;
2535 struct proc_dir_entry *entry;
2536
2537 if (ibm->experimental && !experimental)
2538 return 0;
2539
2540 if (ibm->hid) {
2541 ret = register_driver(ibm);
2542 if (ret < 0)
2543 return ret;
2544 ibm->driver_registered = 1;
2545 }
2546
2547 if (ibm->init) {
2548 ret = ibm->init();
2549 if (ret != 0)
2550 return ret;
2551 ibm->init_called = 1;
2552 }
2553
2554 if (ibm->read) {
2555 entry = create_proc_entry(ibm->name,
2556 S_IFREG | S_IRUGO | S_IWUSR,
2557 proc_dir);
2558 if (!entry) {
2559 printk(IBM_ERR "unable to create proc entry %s\n",
2560 ibm->name);
2561 return -ENODEV;
2562 }
2563 entry->owner = THIS_MODULE;
2564 entry->data = ibm;
2565 entry->read_proc = &dispatch_read;
2566 if (ibm->write)
2567 entry->write_proc = &dispatch_write;
2568 ibm->proc_created = 1;
2569 }
2570
2571 if (ibm->notify) {
2572 ret = setup_notify(ibm);
2573 if (ret < 0)
2574 return ret;
2575 }
2576
2577 return 0;
2578 }
2579
2580 static void ibm_exit(struct ibm_struct *ibm)
2581 {
2582 if (ibm->notify_installed)
2583 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2584 dispatch_notify);
2585
2586 if (ibm->proc_created)
2587 remove_proc_entry(ibm->name, proc_dir);
2588
2589 if (ibm->init_called && ibm->exit)
2590 ibm->exit();
2591
2592 if (ibm->driver_registered) {
2593 acpi_bus_unregister_driver(ibm->driver);
2594 kfree(ibm->driver);
2595 }
2596 }
2597
2598 static void __init ibm_handle_init(char *name,
2599 acpi_handle * handle, acpi_handle parent,
2600 char **paths, int num_paths, char **path)
2601 {
2602 int i;
2603 acpi_status status;
2604
2605 for (i = 0; i < num_paths; i++) {
2606 status = acpi_get_handle(parent, paths[i], handle);
2607 if (ACPI_SUCCESS(status)) {
2608 *path = paths[i];
2609 return;
2610 }
2611 }
2612
2613 *handle = NULL;
2614 }
2615
2616 #define IBM_HANDLE_INIT(object) \
2617 ibm_handle_init(#object, &object##_handle, *object##_parent, \
2618 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
2619
2620 static int set_ibm_param(const char *val, struct kernel_param *kp)
2621 {
2622 unsigned int i;
2623
2624 for (i = 0; i < ARRAY_SIZE(ibms); i++)
2625 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2626 if (strlen(val) > sizeof(ibms[i].param) - 2)
2627 return -ENOSPC;
2628 strcpy(ibms[i].param, val);
2629 strcat(ibms[i].param, ",");
2630 return 0;
2631 }
2632
2633 return -EINVAL;
2634 }
2635
2636 #define IBM_PARAM(feature) \
2637 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2638
2639 IBM_PARAM(hotkey);
2640 IBM_PARAM(bluetooth);
2641 IBM_PARAM(video);
2642 IBM_PARAM(light);
2643 #ifdef CONFIG_ACPI_IBM_DOCK
2644 IBM_PARAM(dock);
2645 #endif
2646 IBM_PARAM(bay);
2647 IBM_PARAM(cmos);
2648 IBM_PARAM(led);
2649 IBM_PARAM(beep);
2650 IBM_PARAM(ecdump);
2651 IBM_PARAM(brightness);
2652 IBM_PARAM(volume);
2653 IBM_PARAM(fan);
2654
2655 static void acpi_ibm_exit(void)
2656 {
2657 int i;
2658
2659 for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2660 ibm_exit(&ibms[i]);
2661
2662 remove_proc_entry(IBM_DIR, acpi_root_dir);
2663
2664 if (ibm_thinkpad_ec_found)
2665 kfree(ibm_thinkpad_ec_found);
2666 }
2667
2668 static char* __init check_dmi_for_ec(void)
2669 {
2670 struct dmi_device *dev = NULL;
2671 char ec_fw_string[18];
2672
2673 /*
2674 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2675 * X32 or newer, all Z series; Some models must have an
2676 * up-to-date BIOS or they will not be detected.
2677 *
2678 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2679 */
2680 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2681 if (sscanf(dev->name,
2682 "IBM ThinkPad Embedded Controller -[%17c",
2683 ec_fw_string) == 1) {
2684 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2685 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2686 return kstrdup(ec_fw_string, GFP_KERNEL);
2687 }
2688 }
2689 return NULL;
2690 }
2691
2692 static int __init acpi_ibm_init(void)
2693 {
2694 int ret, i;
2695
2696 if (acpi_disabled)
2697 return -ENODEV;
2698
2699 if (!acpi_specific_hotkey_enabled) {
2700 printk(IBM_ERR "using generic hotkey driver\n");
2701 return -ENODEV;
2702 }
2703
2704 /* ec is required because many other handles are relative to it */
2705 IBM_HANDLE_INIT(ec);
2706 if (!ec_handle) {
2707 printk(IBM_ERR "ec object not found\n");
2708 return -ENODEV;
2709 }
2710
2711 /* Models with newer firmware report the EC in DMI */
2712 ibm_thinkpad_ec_found = check_dmi_for_ec();
2713 if (ibm_thinkpad_ec_found)
2714 printk(IBM_INFO "ThinkPad EC firmware %s\n",
2715 ibm_thinkpad_ec_found);
2716
2717 /* these handles are not required */
2718 IBM_HANDLE_INIT(vid);
2719 IBM_HANDLE_INIT(vid2);
2720 IBM_HANDLE_INIT(ledb);
2721 IBM_HANDLE_INIT(led);
2722 IBM_HANDLE_INIT(hkey);
2723 IBM_HANDLE_INIT(lght);
2724 IBM_HANDLE_INIT(cmos);
2725 #ifdef CONFIG_ACPI_IBM_DOCK
2726 IBM_HANDLE_INIT(dock);
2727 #endif
2728 IBM_HANDLE_INIT(pci);
2729 IBM_HANDLE_INIT(bay);
2730 if (bay_handle)
2731 IBM_HANDLE_INIT(bay_ej);
2732 IBM_HANDLE_INIT(bay2);
2733 if (bay2_handle)
2734 IBM_HANDLE_INIT(bay2_ej);
2735 IBM_HANDLE_INIT(beep);
2736 IBM_HANDLE_INIT(ecrd);
2737 IBM_HANDLE_INIT(ecwr);
2738 IBM_HANDLE_INIT(fans);
2739 IBM_HANDLE_INIT(gfan);
2740 IBM_HANDLE_INIT(sfan);
2741
2742 proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2743 if (!proc_dir) {
2744 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2745 return -ENODEV;
2746 }
2747 proc_dir->owner = THIS_MODULE;
2748
2749 for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2750 ret = ibm_init(&ibms[i]);
2751 if (ret >= 0 && *ibms[i].param)
2752 ret = ibms[i].write(ibms[i].param);
2753 if (ret < 0) {
2754 acpi_ibm_exit();
2755 return ret;
2756 }
2757 }
2758
2759 return 0;
2760 }
2761
2762 module_init(acpi_ibm_init);
2763 module_exit(acpi_ibm_exit);
Linux with added FPC-III support