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ACPI: ibm-acpi: fix and extend fan control functions
[deliverable/linux.git] / drivers / acpi / ibm_acpi.c
1 /*
2 * ibm_acpi.c - IBM ThinkPad ACPI Extras
3 *
4 *
5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 #define IBM_VERSION "0.12a"
23
24 /*
25 * Changelog:
26 *
27 * 2005-08-17 0.12 fix compilation on 2.6.13-rc kernels
28 * 2005-03-17 0.11 support for 600e, 770x
29 * thanks to Jamie Lentin <lentinj@dial.pipex.com>
30 * support for 770e, G41
31 * G40 and G41 don't have a thinklight
32 * temperatures no longer experimental
33 * experimental brightness control
34 * experimental volume control
35 * experimental fan enable/disable
36 * 2005-01-16 0.10 fix module loading on R30, R31
37 * 2005-01-16 0.9 support for 570, R30, R31
38 * ultrabay support on A22p, A3x
39 * limit arg for cmos, led, beep, drop experimental status
40 * more capable led control on A21e, A22p, T20-22, X20
41 * experimental temperatures and fan speed
42 * experimental embedded controller register dump
43 * mark more functions as __init, drop incorrect __exit
44 * use MODULE_VERSION
45 * thanks to Henrik Brix Andersen <brix@gentoo.org>
46 * fix parameter passing on module loading
47 * thanks to Rusty Russell <rusty@rustcorp.com.au>
48 * thanks to Jim Radford <radford@blackbean.org>
49 * 2004-11-08 0.8 fix init error case, don't return from a macro
50 * thanks to Chris Wright <chrisw@osdl.org>
51 * 2004-10-23 0.7 fix module loading on A21e, A22p, T20, T21, X20
52 * fix led control on A21e
53 * 2004-10-19 0.6 use acpi_bus_register_driver() to claim HKEY device
54 * 2004-10-18 0.5 thinklight support on A21e, G40, R32, T20, T21, X20
55 * proc file format changed
56 * video_switch command
57 * experimental cmos control
58 * experimental led control
59 * experimental acpi sounds
60 * 2004-09-16 0.4 support for module parameters
61 * hotkey mask can be prefixed by 0x
62 * video output switching
63 * video expansion control
64 * ultrabay eject support
65 * removed lcd brightness/on/off control, didn't work
66 * 2004-08-17 0.3 support for R40
67 * lcd off, brightness control
68 * thinklight on/off
69 * 2004-08-14 0.2 support for T series, X20
70 * bluetooth enable/disable
71 * hotkey events disabled by default
72 * removed fan control, currently useless
73 * 2004-08-09 0.1 initial release, support for X series
74 */
75
76 #include <linux/kernel.h>
77 #include <linux/module.h>
78 #include <linux/init.h>
79 #include <linux/types.h>
80 #include <linux/proc_fs.h>
81 #include <linux/backlight.h>
82 #include <asm/uaccess.h>
83 #include <linux/dmi.h>
84
85 #include <acpi/acpi_drivers.h>
86 #include <acpi/acnamesp.h>
87
88 #define IBM_NAME "ibm"
89 #define IBM_DESC "IBM ThinkPad ACPI Extras"
90 #define IBM_FILE "ibm_acpi"
91 #define IBM_URL "http://ibm-acpi.sf.net/"
92
93 MODULE_AUTHOR("Borislav Deianov");
94 MODULE_DESCRIPTION(IBM_DESC);
95 MODULE_VERSION(IBM_VERSION);
96 MODULE_LICENSE("GPL");
97
98 #define IBM_DIR IBM_NAME
99
100 #define IBM_LOG IBM_FILE ": "
101 #define IBM_ERR KERN_ERR IBM_LOG
102 #define IBM_NOTICE KERN_NOTICE IBM_LOG
103 #define IBM_INFO KERN_INFO IBM_LOG
104 #define IBM_DEBUG KERN_DEBUG IBM_LOG
105
106 #define IBM_MAX_ACPI_ARGS 3
107
108 #define __unused __attribute__ ((unused))
109
110 static int experimental;
111 module_param(experimental, int, 0);
112
113 static acpi_handle root_handle = NULL;
114
115 #define IBM_HANDLE(object, parent, paths...) \
116 static acpi_handle object##_handle; \
117 static acpi_handle *object##_parent = &parent##_handle; \
118 static char *object##_path; \
119 static char *object##_paths[] = { paths }
120
121 /*
122 * The following models are supported to various degrees:
123 *
124 * 570, 600e, 600x, 770e, 770x
125 * A20m, A21e, A21m, A21p, A22p, A30, A30p, A31, A31p
126 * G40, G41
127 * R30, R31, R32, R40, R40e, R50, R50e, R50p, R51
128 * T20, T21, T22, T23, T30, T40, T40p, T41, T41p, T42, T42p, T43
129 * X20, X21, X22, X23, X24, X30, X31, X40
130 *
131 * The following models have no supported features:
132 *
133 * 240, 240x, i1400
134 *
135 * Still missing DSDTs for the following models:
136 *
137 * A20p, A22e, A22m
138 * R52
139 * S31
140 * T43p
141 */
142
143 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
144 "\\_SB.PCI.ISA.EC", /* 570 */
145 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
146 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
147 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
148 "\\_SB.PCI0.ICH3.EC0", /* R31 */
149 "\\_SB.PCI0.LPC.EC", /* all others */
150 );
151
152 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
153 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
154 "\\_SB.PCI0.VID0", /* 770e */
155 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
156 "\\_SB.PCI0.AGP.VID", /* all others */
157 ); /* R30, R31 */
158
159 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
160
161 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
162 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
163 "\\CMS", /* R40, R40e */
164 ); /* all others */
165 #ifdef CONFIG_ACPI_IBM_DOCK
166 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
167 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
168 "\\_SB.PCI0.PCI1.DOCK", /* all others */
169 "\\_SB.PCI.ISA.SLCE", /* 570 */
170 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
171 #endif
172 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
173 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
174 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
175 ); /* A21e, R30, R31 */
176
177 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
178 "_EJ0", /* all others */
179 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
180
181 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
182 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
183 ); /* all others */
184
185 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
186 "_EJ0", /* 770x */
187 ); /* all others */
188
189 /* don't list other alternatives as we install a notify handler on the 570 */
190 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
191
192 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
193 "^HKEY", /* R30, R31 */
194 "HKEY", /* all others */
195 ); /* 570 */
196
197 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
198 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
199
200 IBM_HANDLE(led, ec, "SLED", /* 570 */
201 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
202 "LED", /* all others */
203 ); /* R30, R31 */
204
205 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
206 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
207 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
208 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
209
210 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
211 "\\FSPD", /* 600e/x, 770e, 770x */
212 ); /* all others */
213
214 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
215 "JFNS", /* 770x-JL */
216 ); /* all others */
217
218 #define IBM_HKEY_HID "IBM0068"
219 #define IBM_PCI_HID "PNP0A03"
220
221 enum thermal_access_mode {
222 IBMACPI_THERMAL_NONE = 0, /* No thermal support */
223 IBMACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
224 IBMACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
225 IBMACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
226 IBMACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
227 };
228
229 #define IBMACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
230 struct ibm_thermal_sensors_struct {
231 s32 temp[IBMACPI_MAX_THERMAL_SENSORS];
232 };
233
234 /*
235 * FAN ACCESS MODES
236 *
237 * IBMACPI_FAN_RD_ACPI_GFAN:
238 * ACPI GFAN method: returns fan level
239 *
240 * see IBMACPI_FAN_WR_ACPI_SFAN
241 * EC 0x2f not available if GFAN exists
242 *
243 * IBMACPI_FAN_WR_ACPI_SFAN:
244 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
245 *
246 * EC 0x2f might be available *for reading*, but never for writing.
247 *
248 * IBMACPI_FAN_WR_TPEC:
249 * ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
250 * on almost all ThinkPads
251 *
252 * Fan speed changes of any sort (including those caused by the
253 * disengaged mode) are usually done slowly by the firmware as the
254 * maximum ammount of fan duty cycle change per second seems to be
255 * limited.
256 *
257 * Reading is not available if GFAN exists.
258 * Writing is not available if SFAN exists.
259 *
260 * Bits
261 * 7 automatic mode engaged;
262 * (default operation mode of the ThinkPad)
263 * fan level is ignored in this mode.
264 * 6 disengage mode (takes precedence over bit 7);
265 * not available on all thinkpads. May disable
266 * the tachometer, and speeds up fan to 100% duty-cycle,
267 * which speeds it up far above the standard RPM
268 * levels. It is not impossible that it could cause
269 * hardware damage.
270 * 5-3 unused in some models. Extra bits for fan level
271 * in others, but still useless as all values above
272 * 7 map to the same speed as level 7 in these models.
273 * 2-0 fan level (0..7 usually)
274 * 0x00 = stop
275 * 0x07 = max (set when temperatures critical)
276 * Some ThinkPads may have other levels, see
277 * IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
278 *
279 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
280 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
281 * does so, its initial value is meaningless (0x07).
282 *
283 * For firmware bugs, refer to:
284 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
285 *
286 * ----
287 *
288 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
289 * Main fan tachometer reading (in RPM)
290 *
291 * This register is present on all ThinkPads with a new-style EC, and
292 * it is known not to be present on the A21m/e, and T22, as there is
293 * something else in offset 0x84 according to the ACPI DSDT. Other
294 * ThinkPads from this same time period (and earlier) probably lack the
295 * tachometer as well.
296 *
297 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
298 * was never fixed by IBM to report the EC firmware version string
299 * probably support the tachometer (like the early X models), so
300 * detecting it is quite hard. We need more data to know for sure.
301 *
302 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
303 * might result.
304 *
305 * FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
306 * register is not invalidated in ThinkPads that disable tachometer
307 * readings. Thus, the tachometer readings go stale.
308 *
309 * For firmware bugs, refer to:
310 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
311 *
312 * IBMACPI_FAN_WR_ACPI_FANS:
313 * ThinkPad X31, X40, X41. Not available in the X60.
314 *
315 * FANS ACPI handle: takes three arguments: low speed, medium speed,
316 * high speed. ACPI DSDT seems to map these three speeds to levels
317 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
318 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
319 *
320 * The speeds are stored on handles
321 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
322 *
323 * There are three default speed sets, acessible as handles:
324 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
325 *
326 * ACPI DSDT switches which set is in use depending on various
327 * factors.
328 *
329 * IBMACPI_FAN_WR_TPEC is also available and should be used to
330 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
331 * but the ACPI tables just mention level 7.
332 */
333
334 enum fan_status_access_mode {
335 IBMACPI_FAN_NONE = 0, /* No fan status or control */
336 IBMACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
337 IBMACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
338 };
339
340 enum fan_control_access_mode {
341 IBMACPI_FAN_WR_NONE = 0, /* No fan control */
342 IBMACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
343 IBMACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
344 IBMACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
345 };
346
347 enum fan_control_commands {
348 IBMACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
349 IBMACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
350 IBMACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd */
351 };
352
353 enum { /* Fan control constants */
354 fan_status_offset = 0x2f, /* EC register 0x2f */
355 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
356 * 0x84 must be read before 0x85 */
357
358 IBMACPI_FAN_EC_DISENGAGED = 0x40, /* EC mode: tachometer
359 * disengaged */
360 IBMACPI_FAN_EC_AUTO = 0x80, /* EC mode: auto fan
361 * control */
362 };
363
364 static int ibm_thinkpad_ec_found;
365
366 struct ibm_struct {
367 char *name;
368 char param[32];
369
370 char *hid;
371 struct acpi_driver *driver;
372
373 int (*init) (void);
374 int (*read) (char *);
375 int (*write) (char *);
376 void (*exit) (void);
377
378 void (*notify) (struct ibm_struct *, u32);
379 acpi_handle *handle;
380 int type;
381 struct acpi_device *device;
382
383 int driver_registered;
384 int proc_created;
385 int init_called;
386 int notify_installed;
387
388 int experimental;
389 };
390
391 static struct proc_dir_entry *proc_dir = NULL;
392
393 static struct backlight_device *ibm_backlight_device;
394
395 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
396 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
397 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
398
399 static int acpi_evalf(acpi_handle handle,
400 void *res, char *method, char *fmt, ...)
401 {
402 char *fmt0 = fmt;
403 struct acpi_object_list params;
404 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
405 struct acpi_buffer result, *resultp;
406 union acpi_object out_obj;
407 acpi_status status;
408 va_list ap;
409 char res_type;
410 int success;
411 int quiet;
412
413 if (!*fmt) {
414 printk(IBM_ERR "acpi_evalf() called with empty format\n");
415 return 0;
416 }
417
418 if (*fmt == 'q') {
419 quiet = 1;
420 fmt++;
421 } else
422 quiet = 0;
423
424 res_type = *(fmt++);
425
426 params.count = 0;
427 params.pointer = &in_objs[0];
428
429 va_start(ap, fmt);
430 while (*fmt) {
431 char c = *(fmt++);
432 switch (c) {
433 case 'd': /* int */
434 in_objs[params.count].integer.value = va_arg(ap, int);
435 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
436 break;
437 /* add more types as needed */
438 default:
439 printk(IBM_ERR "acpi_evalf() called "
440 "with invalid format character '%c'\n", c);
441 return 0;
442 }
443 }
444 va_end(ap);
445
446 if (res_type != 'v') {
447 result.length = sizeof(out_obj);
448 result.pointer = &out_obj;
449 resultp = &result;
450 } else
451 resultp = NULL;
452
453 status = acpi_evaluate_object(handle, method, &params, resultp);
454
455 switch (res_type) {
456 case 'd': /* int */
457 if (res)
458 *(int *)res = out_obj.integer.value;
459 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
460 break;
461 case 'v': /* void */
462 success = status == AE_OK;
463 break;
464 /* add more types as needed */
465 default:
466 printk(IBM_ERR "acpi_evalf() called "
467 "with invalid format character '%c'\n", res_type);
468 return 0;
469 }
470
471 if (!success && !quiet)
472 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
473 method, fmt0, status);
474
475 return success;
476 }
477
478 static void __unused acpi_print_int(acpi_handle handle, char *method)
479 {
480 int i;
481
482 if (acpi_evalf(handle, &i, method, "d"))
483 printk(IBM_INFO "%s = 0x%x\n", method, i);
484 else
485 printk(IBM_ERR "error calling %s\n", method);
486 }
487
488 static char *next_cmd(char **cmds)
489 {
490 char *start = *cmds;
491 char *end;
492
493 while ((end = strchr(start, ',')) && end == start)
494 start = end + 1;
495
496 if (!end)
497 return NULL;
498
499 *end = 0;
500 *cmds = end + 1;
501 return start;
502 }
503
504 static int driver_init(void)
505 {
506 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
507 printk(IBM_INFO "%s\n", IBM_URL);
508
509 return 0;
510 }
511
512 static int driver_read(char *p)
513 {
514 int len = 0;
515
516 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
517 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
518
519 return len;
520 }
521
522 static int hotkey_supported;
523 static int hotkey_mask_supported;
524 static int hotkey_orig_status;
525 static int hotkey_orig_mask;
526
527 static int hotkey_get(int *status, int *mask)
528 {
529 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
530 return 0;
531
532 if (hotkey_mask_supported)
533 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
534 return 0;
535
536 return 1;
537 }
538
539 static int hotkey_set(int status, int mask)
540 {
541 int i;
542
543 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
544 return 0;
545
546 if (hotkey_mask_supported)
547 for (i = 0; i < 32; i++) {
548 int bit = ((1 << i) & mask) != 0;
549 if (!acpi_evalf(hkey_handle,
550 NULL, "MHKM", "vdd", i + 1, bit))
551 return 0;
552 }
553
554 return 1;
555 }
556
557 static int hotkey_init(void)
558 {
559 /* hotkey not supported on 570 */
560 hotkey_supported = hkey_handle != NULL;
561
562 if (hotkey_supported) {
563 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
564 A30, R30, R31, T20-22, X20-21, X22-24 */
565 hotkey_mask_supported =
566 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
567
568 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
569 return -ENODEV;
570 }
571
572 return 0;
573 }
574
575 static int hotkey_read(char *p)
576 {
577 int status, mask;
578 int len = 0;
579
580 if (!hotkey_supported) {
581 len += sprintf(p + len, "status:\t\tnot supported\n");
582 return len;
583 }
584
585 if (!hotkey_get(&status, &mask))
586 return -EIO;
587
588 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
589 if (hotkey_mask_supported) {
590 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
591 len += sprintf(p + len,
592 "commands:\tenable, disable, reset, <mask>\n");
593 } else {
594 len += sprintf(p + len, "mask:\t\tnot supported\n");
595 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
596 }
597
598 return len;
599 }
600
601 static int hotkey_write(char *buf)
602 {
603 int status, mask;
604 char *cmd;
605 int do_cmd = 0;
606
607 if (!hotkey_supported)
608 return -ENODEV;
609
610 if (!hotkey_get(&status, &mask))
611 return -EIO;
612
613 while ((cmd = next_cmd(&buf))) {
614 if (strlencmp(cmd, "enable") == 0) {
615 status = 1;
616 } else if (strlencmp(cmd, "disable") == 0) {
617 status = 0;
618 } else if (strlencmp(cmd, "reset") == 0) {
619 status = hotkey_orig_status;
620 mask = hotkey_orig_mask;
621 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
622 /* mask set */
623 } else if (sscanf(cmd, "%x", &mask) == 1) {
624 /* mask set */
625 } else
626 return -EINVAL;
627 do_cmd = 1;
628 }
629
630 if (do_cmd && !hotkey_set(status, mask))
631 return -EIO;
632
633 return 0;
634 }
635
636 static void hotkey_exit(void)
637 {
638 if (hotkey_supported)
639 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
640 }
641
642 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
643 {
644 int hkey;
645
646 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
647 acpi_bus_generate_event(ibm->device, event, hkey);
648 else {
649 printk(IBM_ERR "unknown hotkey event %d\n", event);
650 acpi_bus_generate_event(ibm->device, event, 0);
651 }
652 }
653
654 static int bluetooth_supported;
655
656 static int bluetooth_init(void)
657 {
658 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
659 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
660 bluetooth_supported = hkey_handle &&
661 acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
662
663 return 0;
664 }
665
666 static int bluetooth_status(void)
667 {
668 int status;
669
670 if (!bluetooth_supported ||
671 !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
672 status = 0;
673
674 return status;
675 }
676
677 static int bluetooth_read(char *p)
678 {
679 int len = 0;
680 int status = bluetooth_status();
681
682 if (!bluetooth_supported)
683 len += sprintf(p + len, "status:\t\tnot supported\n");
684 else if (!(status & 1))
685 len += sprintf(p + len, "status:\t\tnot installed\n");
686 else {
687 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
688 len += sprintf(p + len, "commands:\tenable, disable\n");
689 }
690
691 return len;
692 }
693
694 static int bluetooth_write(char *buf)
695 {
696 int status = bluetooth_status();
697 char *cmd;
698 int do_cmd = 0;
699
700 if (!bluetooth_supported)
701 return -ENODEV;
702
703 while ((cmd = next_cmd(&buf))) {
704 if (strlencmp(cmd, "enable") == 0) {
705 status |= 2;
706 } else if (strlencmp(cmd, "disable") == 0) {
707 status &= ~2;
708 } else
709 return -EINVAL;
710 do_cmd = 1;
711 }
712
713 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
714 return -EIO;
715
716 return 0;
717 }
718
719 static int wan_supported;
720
721 static int wan_init(void)
722 {
723 wan_supported = hkey_handle &&
724 acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
725
726 return 0;
727 }
728
729 static int wan_status(void)
730 {
731 int status;
732
733 if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
734 status = 0;
735
736 return status;
737 }
738
739 static int wan_read(char *p)
740 {
741 int len = 0;
742 int status = wan_status();
743
744 if (!wan_supported)
745 len += sprintf(p + len, "status:\t\tnot supported\n");
746 else if (!(status & 1))
747 len += sprintf(p + len, "status:\t\tnot installed\n");
748 else {
749 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
750 len += sprintf(p + len, "commands:\tenable, disable\n");
751 }
752
753 return len;
754 }
755
756 static int wan_write(char *buf)
757 {
758 int status = wan_status();
759 char *cmd;
760 int do_cmd = 0;
761
762 if (!wan_supported)
763 return -ENODEV;
764
765 while ((cmd = next_cmd(&buf))) {
766 if (strlencmp(cmd, "enable") == 0) {
767 status |= 2;
768 } else if (strlencmp(cmd, "disable") == 0) {
769 status &= ~2;
770 } else
771 return -EINVAL;
772 do_cmd = 1;
773 }
774
775 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
776 return -EIO;
777
778 return 0;
779 }
780
781 static int video_supported;
782 static int video_orig_autosw;
783
784 #define VIDEO_570 1
785 #define VIDEO_770 2
786 #define VIDEO_NEW 3
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 = 0;
799 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
800 /* 570 */
801 video_supported = VIDEO_570;
802 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
803 /* 600e/x, 770e, 770x */
804 video_supported = VIDEO_770;
805 else
806 /* all others */
807 video_supported = 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 == VIDEO_570) {
818 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
819 status = i & 3;
820 } else if (video_supported == 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 == 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 == VIDEO_570)
845 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
846 else if (video_supported == VIDEO_770 || video_supported == VIDEO_NEW)
847 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
848
849 return autosw & 1;
850 }
851
852 static int video_read(char *p)
853 {
854 int status = video_status();
855 int autosw = video_autosw();
856 int len = 0;
857
858 if (!video_supported) {
859 len += sprintf(p + len, "status:\t\tnot supported\n");
860 return len;
861 }
862
863 len += sprintf(p + len, "status:\t\tsupported\n");
864 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
865 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
866 if (video_supported == VIDEO_NEW)
867 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
868 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
869 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
870 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
871 if (video_supported == VIDEO_NEW)
872 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
873 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
874 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
875
876 return len;
877 }
878
879 static int video_switch(void)
880 {
881 int autosw = video_autosw();
882 int ret;
883
884 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
885 return -EIO;
886 ret = video_supported == VIDEO_570 ?
887 acpi_evalf(ec_handle, NULL, "_Q16", "v") :
888 acpi_evalf(vid_handle, NULL, "VSWT", "v");
889 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
890
891 return ret;
892 }
893
894 static int video_expand(void)
895 {
896 if (video_supported == VIDEO_570)
897 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
898 else if (video_supported == VIDEO_770)
899 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
900 else
901 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
902 }
903
904 static int video_switch2(int status)
905 {
906 int ret;
907
908 if (video_supported == VIDEO_570) {
909 ret = acpi_evalf(NULL, NULL,
910 "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
911 } else if (video_supported == VIDEO_770) {
912 int autosw = video_autosw();
913 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
914 return -EIO;
915
916 ret = acpi_evalf(vid_handle, NULL,
917 "ASWT", "vdd", status * 0x100, 0);
918
919 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
920 } else {
921 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
922 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
923 }
924
925 return ret;
926 }
927
928 static int video_write(char *buf)
929 {
930 char *cmd;
931 int enable, disable, status;
932
933 if (!video_supported)
934 return -ENODEV;
935
936 enable = disable = 0;
937
938 while ((cmd = next_cmd(&buf))) {
939 if (strlencmp(cmd, "lcd_enable") == 0) {
940 enable |= 0x01;
941 } else if (strlencmp(cmd, "lcd_disable") == 0) {
942 disable |= 0x01;
943 } else if (strlencmp(cmd, "crt_enable") == 0) {
944 enable |= 0x02;
945 } else if (strlencmp(cmd, "crt_disable") == 0) {
946 disable |= 0x02;
947 } else if (video_supported == VIDEO_NEW &&
948 strlencmp(cmd, "dvi_enable") == 0) {
949 enable |= 0x08;
950 } else if (video_supported == VIDEO_NEW &&
951 strlencmp(cmd, "dvi_disable") == 0) {
952 disable |= 0x08;
953 } else if (strlencmp(cmd, "auto_enable") == 0) {
954 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
955 return -EIO;
956 } else if (strlencmp(cmd, "auto_disable") == 0) {
957 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
958 return -EIO;
959 } else if (strlencmp(cmd, "video_switch") == 0) {
960 if (!video_switch())
961 return -EIO;
962 } else if (strlencmp(cmd, "expand_toggle") == 0) {
963 if (!video_expand())
964 return -EIO;
965 } else
966 return -EINVAL;
967 }
968
969 if (enable || disable) {
970 status = (video_status() & 0x0f & ~disable) | enable;
971 if (!video_switch2(status))
972 return -EIO;
973 }
974
975 return 0;
976 }
977
978 static void video_exit(void)
979 {
980 acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
981 }
982
983 static int light_supported;
984 static int light_status_supported;
985
986 static int light_init(void)
987 {
988 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
989 light_supported = (cmos_handle || lght_handle) && !ledb_handle;
990
991 if (light_supported)
992 /* light status not supported on
993 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
994 light_status_supported = acpi_evalf(ec_handle, NULL,
995 "KBLT", "qv");
996
997 return 0;
998 }
999
1000 static int light_read(char *p)
1001 {
1002 int len = 0;
1003 int status = 0;
1004
1005 if (!light_supported) {
1006 len += sprintf(p + len, "status:\t\tnot supported\n");
1007 } else if (!light_status_supported) {
1008 len += sprintf(p + len, "status:\t\tunknown\n");
1009 len += sprintf(p + len, "commands:\ton, off\n");
1010 } else {
1011 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1012 return -EIO;
1013 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1014 len += sprintf(p + len, "commands:\ton, off\n");
1015 }
1016
1017 return len;
1018 }
1019
1020 static int light_write(char *buf)
1021 {
1022 int cmos_cmd, lght_cmd;
1023 char *cmd;
1024 int success;
1025
1026 if (!light_supported)
1027 return -ENODEV;
1028
1029 while ((cmd = next_cmd(&buf))) {
1030 if (strlencmp(cmd, "on") == 0) {
1031 cmos_cmd = 0x0c;
1032 lght_cmd = 1;
1033 } else if (strlencmp(cmd, "off") == 0) {
1034 cmos_cmd = 0x0d;
1035 lght_cmd = 0;
1036 } else
1037 return -EINVAL;
1038
1039 success = cmos_handle ?
1040 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1041 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1042 if (!success)
1043 return -EIO;
1044 }
1045
1046 return 0;
1047 }
1048
1049 static int _sta(acpi_handle handle)
1050 {
1051 int status;
1052
1053 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
1054 status = 0;
1055
1056 return status;
1057 }
1058
1059 #ifdef CONFIG_ACPI_IBM_DOCK
1060 #define dock_docked() (_sta(dock_handle) & 1)
1061
1062 static int dock_read(char *p)
1063 {
1064 int len = 0;
1065 int docked = dock_docked();
1066
1067 if (!dock_handle)
1068 len += sprintf(p + len, "status:\t\tnot supported\n");
1069 else if (!docked)
1070 len += sprintf(p + len, "status:\t\tundocked\n");
1071 else {
1072 len += sprintf(p + len, "status:\t\tdocked\n");
1073 len += sprintf(p + len, "commands:\tdock, undock\n");
1074 }
1075
1076 return len;
1077 }
1078
1079 static int dock_write(char *buf)
1080 {
1081 char *cmd;
1082
1083 if (!dock_docked())
1084 return -ENODEV;
1085
1086 while ((cmd = next_cmd(&buf))) {
1087 if (strlencmp(cmd, "undock") == 0) {
1088 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1089 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1090 return -EIO;
1091 } else if (strlencmp(cmd, "dock") == 0) {
1092 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1093 return -EIO;
1094 } else
1095 return -EINVAL;
1096 }
1097
1098 return 0;
1099 }
1100
1101 static void dock_notify(struct ibm_struct *ibm, u32 event)
1102 {
1103 int docked = dock_docked();
1104 int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1105
1106 if (event == 1 && !pci) /* 570 */
1107 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1108 else if (event == 1 && pci) /* 570 */
1109 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1110 else if (event == 3 && docked)
1111 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1112 else if (event == 3 && !docked)
1113 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1114 else if (event == 0 && docked)
1115 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1116 else {
1117 printk(IBM_ERR "unknown dock event %d, status %d\n",
1118 event, _sta(dock_handle));
1119 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1120 }
1121 }
1122 #endif
1123
1124 static int bay_status_supported;
1125 static int bay_status2_supported;
1126 static int bay_eject_supported;
1127 static int bay_eject2_supported;
1128
1129 static int bay_init(void)
1130 {
1131 bay_status_supported = bay_handle &&
1132 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1133 bay_status2_supported = bay2_handle &&
1134 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1135
1136 bay_eject_supported = bay_handle && bay_ej_handle &&
1137 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1138 bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1139 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1140
1141 return 0;
1142 }
1143
1144 #define bay_occupied(b) (_sta(b##_handle) & 1)
1145
1146 static int bay_read(char *p)
1147 {
1148 int len = 0;
1149 int occupied = bay_occupied(bay);
1150 int occupied2 = bay_occupied(bay2);
1151 int eject, eject2;
1152
1153 len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1154 (occupied ? "occupied" : "unoccupied") :
1155 "not supported");
1156 if (bay_status2_supported)
1157 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1158 "occupied" : "unoccupied");
1159
1160 eject = bay_eject_supported && occupied;
1161 eject2 = bay_eject2_supported && occupied2;
1162
1163 if (eject && eject2)
1164 len += sprintf(p + len, "commands:\teject, eject2\n");
1165 else if (eject)
1166 len += sprintf(p + len, "commands:\teject\n");
1167 else if (eject2)
1168 len += sprintf(p + len, "commands:\teject2\n");
1169
1170 return len;
1171 }
1172
1173 static int bay_write(char *buf)
1174 {
1175 char *cmd;
1176
1177 if (!bay_eject_supported && !bay_eject2_supported)
1178 return -ENODEV;
1179
1180 while ((cmd = next_cmd(&buf))) {
1181 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1182 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1183 return -EIO;
1184 } else if (bay_eject2_supported &&
1185 strlencmp(cmd, "eject2") == 0) {
1186 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1187 return -EIO;
1188 } else
1189 return -EINVAL;
1190 }
1191
1192 return 0;
1193 }
1194
1195 static void bay_notify(struct ibm_struct *ibm, u32 event)
1196 {
1197 acpi_bus_generate_event(ibm->device, event, 0);
1198 }
1199
1200 static int cmos_read(char *p)
1201 {
1202 int len = 0;
1203
1204 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1205 R30, R31, T20-22, X20-21 */
1206 if (!cmos_handle)
1207 len += sprintf(p + len, "status:\t\tnot supported\n");
1208 else {
1209 len += sprintf(p + len, "status:\t\tsupported\n");
1210 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1211 }
1212
1213 return len;
1214 }
1215
1216 static int cmos_eval(int cmos_cmd)
1217 {
1218 if (cmos_handle)
1219 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1220 else
1221 return 1;
1222 }
1223
1224 static int cmos_write(char *buf)
1225 {
1226 char *cmd;
1227 int cmos_cmd;
1228
1229 if (!cmos_handle)
1230 return -EINVAL;
1231
1232 while ((cmd = next_cmd(&buf))) {
1233 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1234 cmos_cmd >= 0 && cmos_cmd <= 21) {
1235 /* cmos_cmd set */
1236 } else
1237 return -EINVAL;
1238
1239 if (!cmos_eval(cmos_cmd))
1240 return -EIO;
1241 }
1242
1243 return 0;
1244 }
1245
1246 static int led_supported;
1247
1248 #define LED_570 1
1249 #define LED_OLD 2
1250 #define LED_NEW 3
1251
1252 static int led_init(void)
1253 {
1254 if (!led_handle)
1255 /* led not supported on R30, R31 */
1256 led_supported = 0;
1257 else if (strlencmp(led_path, "SLED") == 0)
1258 /* 570 */
1259 led_supported = LED_570;
1260 else if (strlencmp(led_path, "SYSL") == 0)
1261 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1262 led_supported = LED_OLD;
1263 else
1264 /* all others */
1265 led_supported = LED_NEW;
1266
1267 return 0;
1268 }
1269
1270 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1271
1272 static int led_read(char *p)
1273 {
1274 int len = 0;
1275
1276 if (!led_supported) {
1277 len += sprintf(p + len, "status:\t\tnot supported\n");
1278 return len;
1279 }
1280 len += sprintf(p + len, "status:\t\tsupported\n");
1281
1282 if (led_supported == LED_570) {
1283 /* 570 */
1284 int i, status;
1285 for (i = 0; i < 8; i++) {
1286 if (!acpi_evalf(ec_handle,
1287 &status, "GLED", "dd", 1 << i))
1288 return -EIO;
1289 len += sprintf(p + len, "%d:\t\t%s\n",
1290 i, led_status(status));
1291 }
1292 }
1293
1294 len += sprintf(p + len, "commands:\t"
1295 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1296
1297 return len;
1298 }
1299
1300 /* off, on, blink */
1301 static const int led_sled_arg1[] = { 0, 1, 3 };
1302 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1303 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1304 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1305
1306 #define EC_HLCL 0x0c
1307 #define EC_HLBL 0x0d
1308 #define EC_HLMS 0x0e
1309
1310 static int led_write(char *buf)
1311 {
1312 char *cmd;
1313 int led, ind, ret;
1314
1315 if (!led_supported)
1316 return -ENODEV;
1317
1318 while ((cmd = next_cmd(&buf))) {
1319 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1320 return -EINVAL;
1321
1322 if (strstr(cmd, "off")) {
1323 ind = 0;
1324 } else if (strstr(cmd, "on")) {
1325 ind = 1;
1326 } else if (strstr(cmd, "blink")) {
1327 ind = 2;
1328 } else
1329 return -EINVAL;
1330
1331 if (led_supported == LED_570) {
1332 /* 570 */
1333 led = 1 << led;
1334 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1335 led, led_sled_arg1[ind]))
1336 return -EIO;
1337 } else if (led_supported == LED_OLD) {
1338 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1339 led = 1 << led;
1340 ret = ec_write(EC_HLMS, led);
1341 if (ret >= 0)
1342 ret =
1343 ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
1344 if (ret >= 0)
1345 ret =
1346 ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
1347 if (ret < 0)
1348 return ret;
1349 } else {
1350 /* all others */
1351 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1352 led, led_led_arg1[ind]))
1353 return -EIO;
1354 }
1355 }
1356
1357 return 0;
1358 }
1359
1360 static int beep_read(char *p)
1361 {
1362 int len = 0;
1363
1364 if (!beep_handle)
1365 len += sprintf(p + len, "status:\t\tnot supported\n");
1366 else {
1367 len += sprintf(p + len, "status:\t\tsupported\n");
1368 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1369 }
1370
1371 return len;
1372 }
1373
1374 static int beep_write(char *buf)
1375 {
1376 char *cmd;
1377 int beep_cmd;
1378
1379 if (!beep_handle)
1380 return -ENODEV;
1381
1382 while ((cmd = next_cmd(&buf))) {
1383 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1384 beep_cmd >= 0 && beep_cmd <= 17) {
1385 /* beep_cmd set */
1386 } else
1387 return -EINVAL;
1388 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1389 return -EIO;
1390 }
1391
1392 return 0;
1393 }
1394
1395 static int acpi_ec_read(int i, u8 * p)
1396 {
1397 int v;
1398
1399 if (ecrd_handle) {
1400 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1401 return 0;
1402 *p = v;
1403 } else {
1404 if (ec_read(i, p) < 0)
1405 return 0;
1406 }
1407
1408 return 1;
1409 }
1410
1411 static int acpi_ec_write(int i, u8 v)
1412 {
1413 if (ecwr_handle) {
1414 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1415 return 0;
1416 } else {
1417 if (ec_write(i, v) < 0)
1418 return 0;
1419 }
1420
1421 return 1;
1422 }
1423
1424 static enum thermal_access_mode thermal_read_mode;
1425
1426 static int thermal_init(void)
1427 {
1428 u8 t, ta1, ta2;
1429 int i;
1430 int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1431
1432 if (ibm_thinkpad_ec_found && experimental) {
1433 /*
1434 * Direct EC access mode: sensors at registers
1435 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1436 * non-implemented, thermal sensors return 0x80 when
1437 * not available
1438 */
1439
1440 ta1 = ta2 = 0;
1441 for (i = 0; i < 8; i++) {
1442 if (likely(acpi_ec_read(0x78 + i, &t))) {
1443 ta1 |= t;
1444 } else {
1445 ta1 = 0;
1446 break;
1447 }
1448 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1449 ta2 |= t;
1450 } else {
1451 ta1 = 0;
1452 break;
1453 }
1454 }
1455 if (ta1 == 0) {
1456 /* This is sheer paranoia, but we handle it anyway */
1457 if (acpi_tmp7) {
1458 printk(IBM_ERR
1459 "ThinkPad ACPI EC access misbehaving, "
1460 "falling back to ACPI TMPx access mode\n");
1461 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1462 } else {
1463 printk(IBM_ERR
1464 "ThinkPad ACPI EC access misbehaving, "
1465 "disabling thermal sensors access\n");
1466 thermal_read_mode = IBMACPI_THERMAL_NONE;
1467 }
1468 } else {
1469 thermal_read_mode =
1470 (ta2 != 0) ?
1471 IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
1472 }
1473 } else if (acpi_tmp7) {
1474 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1475 /* 600e/x, 770e, 770x */
1476 thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
1477 } else {
1478 /* Standard ACPI TMPx access, max 8 sensors */
1479 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1480 }
1481 } else {
1482 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1483 thermal_read_mode = IBMACPI_THERMAL_NONE;
1484 }
1485
1486 return 0;
1487 }
1488
1489 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1490 {
1491 int i, t;
1492 s8 tmp;
1493 char tmpi[] = "TMPi";
1494
1495 if (!s)
1496 return -EINVAL;
1497
1498 switch (thermal_read_mode) {
1499 #if IBMACPI_MAX_THERMAL_SENSORS >= 16
1500 case IBMACPI_THERMAL_TPEC_16:
1501 for (i = 0; i < 8; i++) {
1502 if (!acpi_ec_read(0xC0 + i, &tmp))
1503 return -EIO;
1504 s->temp[i + 8] = tmp * 1000;
1505 }
1506 /* fallthrough */
1507 #endif
1508 case IBMACPI_THERMAL_TPEC_8:
1509 for (i = 0; i < 8; i++) {
1510 if (!acpi_ec_read(0x78 + i, &tmp))
1511 return -EIO;
1512 s->temp[i] = tmp * 1000;
1513 }
1514 return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
1515
1516 case IBMACPI_THERMAL_ACPI_UPDT:
1517 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1518 return -EIO;
1519 for (i = 0; i < 8; i++) {
1520 tmpi[3] = '0' + i;
1521 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1522 return -EIO;
1523 s->temp[i] = (t - 2732) * 100;
1524 }
1525 return 8;
1526
1527 case IBMACPI_THERMAL_ACPI_TMP07:
1528 for (i = 0; i < 8; i++) {
1529 tmpi[3] = '0' + i;
1530 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1531 return -EIO;
1532 s->temp[i] = t * 1000;
1533 }
1534 return 8;
1535
1536 case IBMACPI_THERMAL_NONE:
1537 default:
1538 return 0;
1539 }
1540 }
1541
1542 static int thermal_read(char *p)
1543 {
1544 int len = 0;
1545 int n, i;
1546 struct ibm_thermal_sensors_struct t;
1547
1548 n = thermal_get_sensors(&t);
1549 if (unlikely(n < 0))
1550 return n;
1551
1552 len += sprintf(p + len, "temperatures:\t");
1553
1554 if (n > 0) {
1555 for (i = 0; i < (n - 1); i++)
1556 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1557 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1558 } else
1559 len += sprintf(p + len, "not supported\n");
1560
1561 return len;
1562 }
1563
1564 static u8 ecdump_regs[256];
1565
1566 static int ecdump_read(char *p)
1567 {
1568 int len = 0;
1569 int i, j;
1570 u8 v;
1571
1572 len += sprintf(p + len, "EC "
1573 " +00 +01 +02 +03 +04 +05 +06 +07"
1574 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1575 for (i = 0; i < 256; i += 16) {
1576 len += sprintf(p + len, "EC 0x%02x:", i);
1577 for (j = 0; j < 16; j++) {
1578 if (!acpi_ec_read(i + j, &v))
1579 break;
1580 if (v != ecdump_regs[i + j])
1581 len += sprintf(p + len, " *%02x", v);
1582 else
1583 len += sprintf(p + len, " %02x", v);
1584 ecdump_regs[i + j] = v;
1585 }
1586 len += sprintf(p + len, "\n");
1587 if (j != 16)
1588 break;
1589 }
1590
1591 /* These are way too dangerous to advertise openly... */
1592 #if 0
1593 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1594 " (<offset> is 00-ff, <value> is 00-ff)\n");
1595 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1596 " (<offset> is 00-ff, <value> is 0-255)\n");
1597 #endif
1598 return len;
1599 }
1600
1601 static int ecdump_write(char *buf)
1602 {
1603 char *cmd;
1604 int i, v;
1605
1606 while ((cmd = next_cmd(&buf))) {
1607 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1608 /* i and v set */
1609 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1610 /* i and v set */
1611 } else
1612 return -EINVAL;
1613 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1614 if (!acpi_ec_write(i, v))
1615 return -EIO;
1616 } else
1617 return -EINVAL;
1618 }
1619
1620 return 0;
1621 }
1622
1623 static int brightness_offset = 0x31;
1624
1625 static int brightness_get(struct backlight_device *bd)
1626 {
1627 u8 level;
1628 if (!acpi_ec_read(brightness_offset, &level))
1629 return -EIO;
1630
1631 level &= 0x7;
1632 return level;
1633 }
1634
1635 static int brightness_read(char *p)
1636 {
1637 int len = 0;
1638 int level;
1639
1640 if ((level = brightness_get(NULL)) < 0) {
1641 len += sprintf(p + len, "level:\t\tunreadable\n");
1642 } else {
1643 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1644 len += sprintf(p + len, "commands:\tup, down\n");
1645 len += sprintf(p + len, "commands:\tlevel <level>"
1646 " (<level> is 0-7)\n");
1647 }
1648
1649 return len;
1650 }
1651
1652 #define BRIGHTNESS_UP 4
1653 #define BRIGHTNESS_DOWN 5
1654
1655 static int brightness_set(int value)
1656 {
1657 int cmos_cmd, inc, i;
1658 int current_value = brightness_get(NULL);
1659
1660 value &= 7;
1661
1662 cmos_cmd = value > current_value ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
1663 inc = value > current_value ? 1 : -1;
1664 for (i = current_value; i != value; i += inc) {
1665 if (!cmos_eval(cmos_cmd))
1666 return -EIO;
1667 if (!acpi_ec_write(brightness_offset, i + inc))
1668 return -EIO;
1669 }
1670
1671 return 0;
1672 }
1673
1674 static int brightness_write(char *buf)
1675 {
1676 int level;
1677 int new_level;
1678 char *cmd;
1679
1680 while ((cmd = next_cmd(&buf))) {
1681 if ((level = brightness_get(NULL)) < 0)
1682 return level;
1683 level &= 7;
1684
1685 if (strlencmp(cmd, "up") == 0) {
1686 new_level = level == 7 ? 7 : level + 1;
1687 } else if (strlencmp(cmd, "down") == 0) {
1688 new_level = level == 0 ? 0 : level - 1;
1689 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1690 new_level >= 0 && new_level <= 7) {
1691 /* new_level set */
1692 } else
1693 return -EINVAL;
1694
1695 brightness_set(new_level);
1696 }
1697
1698 return 0;
1699 }
1700
1701 static int brightness_update_status(struct backlight_device *bd)
1702 {
1703 return brightness_set(bd->props->brightness);
1704 }
1705
1706 static int volume_offset = 0x30;
1707
1708 static int volume_read(char *p)
1709 {
1710 int len = 0;
1711 u8 level;
1712
1713 if (!acpi_ec_read(volume_offset, &level)) {
1714 len += sprintf(p + len, "level:\t\tunreadable\n");
1715 } else {
1716 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1717 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1718 len += sprintf(p + len, "commands:\tup, down, mute\n");
1719 len += sprintf(p + len, "commands:\tlevel <level>"
1720 " (<level> is 0-15)\n");
1721 }
1722
1723 return len;
1724 }
1725
1726 #define VOLUME_DOWN 0
1727 #define VOLUME_UP 1
1728 #define VOLUME_MUTE 2
1729
1730 static int volume_write(char *buf)
1731 {
1732 int cmos_cmd, inc, i;
1733 u8 level, mute;
1734 int new_level, new_mute;
1735 char *cmd;
1736
1737 while ((cmd = next_cmd(&buf))) {
1738 if (!acpi_ec_read(volume_offset, &level))
1739 return -EIO;
1740 new_mute = mute = level & 0x40;
1741 new_level = level = level & 0xf;
1742
1743 if (strlencmp(cmd, "up") == 0) {
1744 if (mute)
1745 new_mute = 0;
1746 else
1747 new_level = level == 15 ? 15 : level + 1;
1748 } else if (strlencmp(cmd, "down") == 0) {
1749 if (mute)
1750 new_mute = 0;
1751 else
1752 new_level = level == 0 ? 0 : level - 1;
1753 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1754 new_level >= 0 && new_level <= 15) {
1755 /* new_level set */
1756 } else if (strlencmp(cmd, "mute") == 0) {
1757 new_mute = 0x40;
1758 } else
1759 return -EINVAL;
1760
1761 if (new_level != level) { /* mute doesn't change */
1762 cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1763 inc = new_level > level ? 1 : -1;
1764
1765 if (mute && (!cmos_eval(cmos_cmd) ||
1766 !acpi_ec_write(volume_offset, level)))
1767 return -EIO;
1768
1769 for (i = level; i != new_level; i += inc)
1770 if (!cmos_eval(cmos_cmd) ||
1771 !acpi_ec_write(volume_offset, i + inc))
1772 return -EIO;
1773
1774 if (mute && (!cmos_eval(VOLUME_MUTE) ||
1775 !acpi_ec_write(volume_offset,
1776 new_level + mute)))
1777 return -EIO;
1778 }
1779
1780 if (new_mute != mute) { /* level doesn't change */
1781 cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1782
1783 if (!cmos_eval(cmos_cmd) ||
1784 !acpi_ec_write(volume_offset, level + new_mute))
1785 return -EIO;
1786 }
1787 }
1788
1789 return 0;
1790 }
1791
1792 static enum fan_status_access_mode fan_status_access_mode;
1793 static enum fan_control_access_mode fan_control_access_mode;
1794 static enum fan_control_commands fan_control_commands;
1795
1796 static int fan_init(void)
1797 {
1798 u8 status;
1799
1800 fan_status_access_mode = IBMACPI_FAN_NONE;
1801 fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1802 fan_control_commands = 0;
1803
1804 if (gfan_handle) {
1805 /* 570, 600e/x, 770e, 770x */
1806 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1807 } else {
1808 /* all other ThinkPads: note that even old-style
1809 * ThinkPad ECs supports the fan control register */
1810 if (likely(acpi_ec_read(fan_status_offset, &status))) {
1811 fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1812 } else {
1813 printk(IBM_ERR
1814 "ThinkPad ACPI EC access misbehaving, "
1815 "fan status and control unavailable\n");
1816 return 0;
1817 }
1818 }
1819
1820 if (sfan_handle) {
1821 /* 570, 770x-JL */
1822 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
1823 fan_control_commands |=
1824 IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
1825 } else {
1826 if (!gfan_handle) {
1827 /* gfan without sfan means no fan control */
1828 /* all other models implement TP EC 0x2f control */
1829
1830 if (fans_handle) {
1831 /* X31, X40, X41 */
1832 fan_control_access_mode =
1833 IBMACPI_FAN_WR_ACPI_FANS;
1834 fan_control_commands |=
1835 IBMACPI_FAN_CMD_SPEED |
1836 IBMACPI_FAN_CMD_LEVEL |
1837 IBMACPI_FAN_CMD_ENABLE;
1838 } else {
1839 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
1840 fan_control_commands |=
1841 IBMACPI_FAN_CMD_LEVEL |
1842 IBMACPI_FAN_CMD_ENABLE;
1843 }
1844 }
1845 }
1846
1847 return 0;
1848 }
1849
1850 static int fan_get_status(u8 *status)
1851 {
1852 u8 s;
1853
1854 /* TODO:
1855 * Add IBMACPI_FAN_RD_ACPI_FANS ? */
1856
1857 switch (fan_status_access_mode) {
1858 case IBMACPI_FAN_RD_ACPI_GFAN:
1859 /* 570, 600e/x, 770e, 770x */
1860
1861 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1862 return -EIO;
1863
1864 if (likely(status))
1865 *status = s & 0x07;
1866
1867 break;
1868
1869 case IBMACPI_FAN_RD_TPEC:
1870 /* all except 570, 600e/x, 770e, 770x */
1871 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
1872 return -EIO;
1873
1874 if (likely(status))
1875 *status = s;
1876
1877 break;
1878
1879 default:
1880 return -ENXIO;
1881 }
1882
1883 return 0;
1884 }
1885
1886 static int fan_get_speed(unsigned int *speed)
1887 {
1888 u8 hi, lo;
1889
1890 switch (fan_status_access_mode) {
1891 case IBMACPI_FAN_RD_TPEC:
1892 /* all except 570, 600e/x, 770e, 770x */
1893 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
1894 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
1895 return -EIO;
1896
1897 if (likely(speed))
1898 *speed = (hi << 8) | lo;
1899
1900 break;
1901
1902 default:
1903 return -ENXIO;
1904 }
1905
1906 return 0;
1907 }
1908
1909 static int fan_read(char *p)
1910 {
1911 int len = 0;
1912 int rc;
1913 u8 status;
1914 unsigned int speed = 0;
1915
1916 switch (fan_status_access_mode) {
1917 case IBMACPI_FAN_RD_ACPI_GFAN:
1918 /* 570, 600e/x, 770e, 770x */
1919 if ((rc = fan_get_status(&status)) < 0)
1920 return rc;
1921
1922 len += sprintf(p + len, "status:\t\t%s\n"
1923 "level:\t\t%d\n",
1924 (status != 0) ? "enabled" : "disabled", status);
1925 break;
1926
1927 case IBMACPI_FAN_RD_TPEC:
1928 /* all except 570, 600e/x, 770e, 770x */
1929 if ((rc = fan_get_status(&status)) < 0)
1930 return rc;
1931
1932 len += sprintf(p + len, "status:\t\t%s\n",
1933 (status != 0) ? "enabled" : "disabled");
1934
1935 if ((rc = fan_get_speed(&speed)) < 0)
1936 return rc;
1937
1938 len += sprintf(p + len, "speed:\t\t%d\n", speed);
1939
1940 if (status & IBMACPI_FAN_EC_DISENGAGED)
1941 /* Disengaged mode takes precedence */
1942 len += sprintf(p + len, "level:\t\tdisengaged\n");
1943 else if (status & IBMACPI_FAN_EC_AUTO)
1944 len += sprintf(p + len, "level:\t\tauto\n");
1945 else
1946 len += sprintf(p + len, "level:\t\t%d\n", status);
1947 break;
1948
1949 case IBMACPI_FAN_NONE:
1950 default:
1951 len += sprintf(p + len, "status:\t\tnot supported\n");
1952 }
1953
1954 if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
1955 len += sprintf(p + len, "commands:\tlevel <level>");
1956
1957 switch (fan_control_access_mode) {
1958 case IBMACPI_FAN_WR_ACPI_SFAN:
1959 len += sprintf(p + len, " (<level> is 0-7)\n");
1960 break;
1961
1962 default:
1963 len += sprintf(p + len, " (<level> is 0-7, "
1964 "auto, disengaged)\n");
1965 break;
1966 }
1967 }
1968
1969 if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
1970 len += sprintf(p + len, "commands:\tenable, disable\n");
1971
1972 if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
1973 len += sprintf(p + len, "commands:\tspeed <speed>"
1974 " (<speed> is 0-65535)\n");
1975
1976 return len;
1977 }
1978
1979 static int fan_set_level(int level)
1980 {
1981 switch (fan_control_access_mode) {
1982 case IBMACPI_FAN_WR_ACPI_SFAN:
1983 if (level >= 0 && level <= 7) {
1984 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
1985 return -EIO;
1986 } else
1987 return -EINVAL;
1988 break;
1989
1990 case IBMACPI_FAN_WR_ACPI_FANS:
1991 case IBMACPI_FAN_WR_TPEC:
1992 if ((level != IBMACPI_FAN_EC_AUTO) &&
1993 (level != IBMACPI_FAN_EC_DISENGAGED) &&
1994 ((level < 0) || (level > 7)))
1995 return -EINVAL;
1996
1997 if (!acpi_ec_write(fan_status_offset, level))
1998 return -EIO;
1999 break;
2000
2001 default:
2002 return -ENXIO;
2003 }
2004 return 0;
2005 }
2006
2007 static int fan_set_enable(void)
2008 {
2009 u8 s;
2010 int rc;
2011
2012 switch (fan_control_access_mode) {
2013 case IBMACPI_FAN_WR_ACPI_FANS:
2014 case IBMACPI_FAN_WR_TPEC:
2015 if ((rc = fan_get_status(&s)) < 0)
2016 return rc;
2017
2018 /* Don't go out of emergency fan mode */
2019 if (s != 7)
2020 s = IBMACPI_FAN_EC_AUTO;
2021
2022 if (!acpi_ec_write(fan_status_offset, s))
2023 return -EIO;
2024 break;
2025
2026 case IBMACPI_FAN_WR_ACPI_SFAN:
2027 if ((rc = fan_get_status(&s)) < 0)
2028 return rc;
2029
2030 s &= 0x07;
2031
2032 /* Set fan to at least level 4 */
2033 if (s < 4)
2034 s = 4;
2035
2036 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2037 return -EIO;
2038 break;
2039
2040 default:
2041 return -ENXIO;
2042 }
2043 return 0;
2044 }
2045
2046 static int fan_set_disable(void)
2047 {
2048 switch (fan_control_access_mode) {
2049 case IBMACPI_FAN_WR_ACPI_FANS:
2050 case IBMACPI_FAN_WR_TPEC:
2051 if (!acpi_ec_write(fan_status_offset, 0x00))
2052 return -EIO;
2053 break;
2054
2055 case IBMACPI_FAN_WR_ACPI_SFAN:
2056 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2057 return -EIO;
2058 break;
2059
2060 default:
2061 return -ENXIO;
2062 }
2063 return 0;
2064 }
2065
2066 static int fan_set_speed(int speed)
2067 {
2068 switch (fan_control_access_mode) {
2069 case IBMACPI_FAN_WR_ACPI_FANS:
2070 if (speed >= 0 && speed <= 65535) {
2071 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2072 speed, speed, speed))
2073 return -EIO;
2074 } else
2075 return -EINVAL;
2076 break;
2077
2078 default:
2079 return -ENXIO;
2080 }
2081 return 0;
2082 }
2083
2084 static int fan_write_cmd_level(const char *cmd, int *rc)
2085 {
2086 int level;
2087
2088 if (strlencmp(cmd, "level auto") == 0)
2089 level = IBMACPI_FAN_EC_AUTO;
2090 else if (strlencmp(cmd, "level disengaged") == 0)
2091 level = IBMACPI_FAN_EC_DISENGAGED;
2092 else if (sscanf(cmd, "level %d", &level) != 1)
2093 return 0;
2094
2095 if ((*rc = fan_set_level(level)) == -ENXIO)
2096 printk(IBM_ERR "level command accepted for unsupported "
2097 "access mode %d", fan_control_access_mode);
2098
2099 return 1;
2100 }
2101
2102 static int fan_write_cmd_enable(const char *cmd, int *rc)
2103 {
2104 if (strlencmp(cmd, "enable") != 0)
2105 return 0;
2106
2107 if ((*rc = fan_set_enable()) == -ENXIO)
2108 printk(IBM_ERR "enable command accepted for unsupported "
2109 "access mode %d", fan_control_access_mode);
2110
2111 return 1;
2112 }
2113
2114 static int fan_write_cmd_disable(const char *cmd, int *rc)
2115 {
2116 if (strlencmp(cmd, "disable") != 0)
2117 return 0;
2118
2119 if ((*rc = fan_set_disable()) == -ENXIO)
2120 printk(IBM_ERR "disable command accepted for unsupported "
2121 "access mode %d", fan_control_access_mode);
2122
2123 return 1;
2124 }
2125
2126 static int fan_write_cmd_speed(const char *cmd, int *rc)
2127 {
2128 int speed;
2129
2130 /* TODO:
2131 * Support speed <low> <medium> <high> ? */
2132
2133 if (sscanf(cmd, "speed %d", &speed) != 1)
2134 return 0;
2135
2136 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2137 printk(IBM_ERR "speed command accepted for unsupported "
2138 "access mode %d", fan_control_access_mode);
2139
2140 return 1;
2141 }
2142
2143 static int fan_write(char *buf)
2144 {
2145 char *cmd;
2146 int rc = 0;
2147
2148 while (!rc && (cmd = next_cmd(&buf))) {
2149 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2150 fan_write_cmd_level(cmd, &rc)) &&
2151 !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2152 (fan_write_cmd_enable(cmd, &rc) ||
2153 fan_write_cmd_disable(cmd, &rc))) &&
2154 !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2155 fan_write_cmd_speed(cmd, &rc))
2156 )
2157 rc = -EINVAL;
2158 }
2159
2160 return rc;
2161 }
2162
2163 static struct ibm_struct ibms[] = {
2164 {
2165 .name = "driver",
2166 .init = driver_init,
2167 .read = driver_read,
2168 },
2169 {
2170 .name = "hotkey",
2171 .hid = IBM_HKEY_HID,
2172 .init = hotkey_init,
2173 .read = hotkey_read,
2174 .write = hotkey_write,
2175 .exit = hotkey_exit,
2176 .notify = hotkey_notify,
2177 .handle = &hkey_handle,
2178 .type = ACPI_DEVICE_NOTIFY,
2179 },
2180 {
2181 .name = "bluetooth",
2182 .init = bluetooth_init,
2183 .read = bluetooth_read,
2184 .write = bluetooth_write,
2185 },
2186 {
2187 .name = "wan",
2188 .init = wan_init,
2189 .read = wan_read,
2190 .write = wan_write,
2191 .experimental = 1,
2192 },
2193 {
2194 .name = "video",
2195 .init = video_init,
2196 .read = video_read,
2197 .write = video_write,
2198 .exit = video_exit,
2199 },
2200 {
2201 .name = "light",
2202 .init = light_init,
2203 .read = light_read,
2204 .write = light_write,
2205 },
2206 #ifdef CONFIG_ACPI_IBM_DOCK
2207 {
2208 .name = "dock",
2209 .read = dock_read,
2210 .write = dock_write,
2211 .notify = dock_notify,
2212 .handle = &dock_handle,
2213 .type = ACPI_SYSTEM_NOTIFY,
2214 },
2215 {
2216 .name = "dock",
2217 .hid = IBM_PCI_HID,
2218 .notify = dock_notify,
2219 .handle = &pci_handle,
2220 .type = ACPI_SYSTEM_NOTIFY,
2221 },
2222 #endif
2223 {
2224 .name = "bay",
2225 .init = bay_init,
2226 .read = bay_read,
2227 .write = bay_write,
2228 .notify = bay_notify,
2229 .handle = &bay_handle,
2230 .type = ACPI_SYSTEM_NOTIFY,
2231 },
2232 {
2233 .name = "cmos",
2234 .read = cmos_read,
2235 .write = cmos_write,
2236 },
2237 {
2238 .name = "led",
2239 .init = led_init,
2240 .read = led_read,
2241 .write = led_write,
2242 },
2243 {
2244 .name = "beep",
2245 .read = beep_read,
2246 .write = beep_write,
2247 },
2248 {
2249 .name = "thermal",
2250 .init = thermal_init,
2251 .read = thermal_read,
2252 },
2253 {
2254 .name = "ecdump",
2255 .read = ecdump_read,
2256 .write = ecdump_write,
2257 .experimental = 1,
2258 },
2259 {
2260 .name = "brightness",
2261 .read = brightness_read,
2262 .write = brightness_write,
2263 },
2264 {
2265 .name = "volume",
2266 .read = volume_read,
2267 .write = volume_write,
2268 },
2269 {
2270 .name = "fan",
2271 .read = fan_read,
2272 .write = fan_write,
2273 .init = fan_init,
2274 .experimental = 1,
2275 },
2276 };
2277
2278 static int dispatch_read(char *page, char **start, off_t off, int count,
2279 int *eof, void *data)
2280 {
2281 struct ibm_struct *ibm = (struct ibm_struct *)data;
2282 int len;
2283
2284 if (!ibm || !ibm->read)
2285 return -EINVAL;
2286
2287 len = ibm->read(page);
2288 if (len < 0)
2289 return len;
2290
2291 if (len <= off + count)
2292 *eof = 1;
2293 *start = page + off;
2294 len -= off;
2295 if (len > count)
2296 len = count;
2297 if (len < 0)
2298 len = 0;
2299
2300 return len;
2301 }
2302
2303 static int dispatch_write(struct file *file, const char __user * userbuf,
2304 unsigned long count, void *data)
2305 {
2306 struct ibm_struct *ibm = (struct ibm_struct *)data;
2307 char *kernbuf;
2308 int ret;
2309
2310 if (!ibm || !ibm->write)
2311 return -EINVAL;
2312
2313 kernbuf = kmalloc(count + 2, GFP_KERNEL);
2314 if (!kernbuf)
2315 return -ENOMEM;
2316
2317 if (copy_from_user(kernbuf, userbuf, count)) {
2318 kfree(kernbuf);
2319 return -EFAULT;
2320 }
2321
2322 kernbuf[count] = 0;
2323 strcat(kernbuf, ",");
2324 ret = ibm->write(kernbuf);
2325 if (ret == 0)
2326 ret = count;
2327
2328 kfree(kernbuf);
2329
2330 return ret;
2331 }
2332
2333 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
2334 {
2335 struct ibm_struct *ibm = (struct ibm_struct *)data;
2336
2337 if (!ibm || !ibm->notify)
2338 return;
2339
2340 ibm->notify(ibm, event);
2341 }
2342
2343 static int __init setup_notify(struct ibm_struct *ibm)
2344 {
2345 acpi_status status;
2346 int ret;
2347
2348 if (!*ibm->handle)
2349 return 0;
2350
2351 ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
2352 if (ret < 0) {
2353 printk(IBM_ERR "%s device not present\n", ibm->name);
2354 return 0;
2355 }
2356
2357 acpi_driver_data(ibm->device) = ibm;
2358 sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
2359
2360 status = acpi_install_notify_handler(*ibm->handle, ibm->type,
2361 dispatch_notify, ibm);
2362 if (ACPI_FAILURE(status)) {
2363 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
2364 ibm->name, status);
2365 return -ENODEV;
2366 }
2367
2368 return 0;
2369 }
2370
2371 static int __init ibm_device_add(struct acpi_device *device)
2372 {
2373 return 0;
2374 }
2375
2376 static int __init register_driver(struct ibm_struct *ibm)
2377 {
2378 int ret;
2379
2380 ibm->driver = kmalloc(sizeof(struct acpi_driver), GFP_KERNEL);
2381 if (!ibm->driver) {
2382 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
2383 return -1;
2384 }
2385
2386 memset(ibm->driver, 0, sizeof(struct acpi_driver));
2387 sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
2388 ibm->driver->ids = ibm->hid;
2389 ibm->driver->ops.add = &ibm_device_add;
2390
2391 ret = acpi_bus_register_driver(ibm->driver);
2392 if (ret < 0) {
2393 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
2394 ibm->hid, ret);
2395 kfree(ibm->driver);
2396 }
2397
2398 return ret;
2399 }
2400
2401 static int __init ibm_init(struct ibm_struct *ibm)
2402 {
2403 int ret;
2404 struct proc_dir_entry *entry;
2405
2406 if (ibm->experimental && !experimental)
2407 return 0;
2408
2409 if (ibm->hid) {
2410 ret = register_driver(ibm);
2411 if (ret < 0)
2412 return ret;
2413 ibm->driver_registered = 1;
2414 }
2415
2416 if (ibm->init) {
2417 ret = ibm->init();
2418 if (ret != 0)
2419 return ret;
2420 ibm->init_called = 1;
2421 }
2422
2423 if (ibm->read) {
2424 entry = create_proc_entry(ibm->name,
2425 S_IFREG | S_IRUGO | S_IWUSR,
2426 proc_dir);
2427 if (!entry) {
2428 printk(IBM_ERR "unable to create proc entry %s\n",
2429 ibm->name);
2430 return -ENODEV;
2431 }
2432 entry->owner = THIS_MODULE;
2433 entry->data = ibm;
2434 entry->read_proc = &dispatch_read;
2435 if (ibm->write)
2436 entry->write_proc = &dispatch_write;
2437 ibm->proc_created = 1;
2438 }
2439
2440 if (ibm->notify) {
2441 ret = setup_notify(ibm);
2442 if (ret < 0)
2443 return ret;
2444 ibm->notify_installed = 1;
2445 }
2446
2447 return 0;
2448 }
2449
2450 static void ibm_exit(struct ibm_struct *ibm)
2451 {
2452 if (ibm->notify_installed)
2453 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2454 dispatch_notify);
2455
2456 if (ibm->proc_created)
2457 remove_proc_entry(ibm->name, proc_dir);
2458
2459 if (ibm->init_called && ibm->exit)
2460 ibm->exit();
2461
2462 if (ibm->driver_registered) {
2463 acpi_bus_unregister_driver(ibm->driver);
2464 kfree(ibm->driver);
2465 }
2466 }
2467
2468 static void __init ibm_handle_init(char *name,
2469 acpi_handle * handle, acpi_handle parent,
2470 char **paths, int num_paths, char **path)
2471 {
2472 int i;
2473 acpi_status status;
2474
2475 for (i = 0; i < num_paths; i++) {
2476 status = acpi_get_handle(parent, paths[i], handle);
2477 if (ACPI_SUCCESS(status)) {
2478 *path = paths[i];
2479 return;
2480 }
2481 }
2482
2483 *handle = NULL;
2484 }
2485
2486 #define IBM_HANDLE_INIT(object) \
2487 ibm_handle_init(#object, &object##_handle, *object##_parent, \
2488 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
2489
2490 static int set_ibm_param(const char *val, struct kernel_param *kp)
2491 {
2492 unsigned int i;
2493
2494 for (i = 0; i < ARRAY_SIZE(ibms); i++)
2495 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2496 if (strlen(val) > sizeof(ibms[i].param) - 2)
2497 return -ENOSPC;
2498 strcpy(ibms[i].param, val);
2499 strcat(ibms[i].param, ",");
2500 return 0;
2501 }
2502
2503 return -EINVAL;
2504 }
2505
2506 #define IBM_PARAM(feature) \
2507 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2508
2509 IBM_PARAM(hotkey);
2510 IBM_PARAM(bluetooth);
2511 IBM_PARAM(video);
2512 IBM_PARAM(light);
2513 #ifdef CONFIG_ACPI_IBM_DOCK
2514 IBM_PARAM(dock);
2515 #endif
2516 IBM_PARAM(bay);
2517 IBM_PARAM(cmos);
2518 IBM_PARAM(led);
2519 IBM_PARAM(beep);
2520 IBM_PARAM(ecdump);
2521 IBM_PARAM(brightness);
2522 IBM_PARAM(volume);
2523 IBM_PARAM(fan);
2524
2525 static struct backlight_properties ibm_backlight_data = {
2526 .owner = THIS_MODULE,
2527 .get_brightness = brightness_get,
2528 .update_status = brightness_update_status,
2529 .max_brightness = 7,
2530 };
2531
2532 static void acpi_ibm_exit(void)
2533 {
2534 int i;
2535
2536 if (ibm_backlight_device)
2537 backlight_device_unregister(ibm_backlight_device);
2538
2539 for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2540 ibm_exit(&ibms[i]);
2541
2542 remove_proc_entry(IBM_DIR, acpi_root_dir);
2543 }
2544
2545 static int __init check_dmi_for_ec(void)
2546 {
2547 struct dmi_device *dev = NULL;
2548
2549 /*
2550 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2551 * X32 or newer, all Z series; Some models must have an
2552 * up-to-date BIOS or they will not be detected.
2553 *
2554 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2555 */
2556 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2557 if (strstr(dev->name, "IBM ThinkPad Embedded Controller"))
2558 return 1;
2559 }
2560 return 0;
2561 }
2562
2563 static int __init acpi_ibm_init(void)
2564 {
2565 int ret, i;
2566
2567 if (acpi_disabled)
2568 return -ENODEV;
2569
2570 if (!acpi_specific_hotkey_enabled) {
2571 printk(IBM_ERR "using generic hotkey driver\n");
2572 return -ENODEV;
2573 }
2574
2575 /* ec is required because many other handles are relative to it */
2576 IBM_HANDLE_INIT(ec);
2577 if (!ec_handle) {
2578 printk(IBM_ERR "ec object not found\n");
2579 return -ENODEV;
2580 }
2581
2582 /* Models with newer firmware report the EC in DMI */
2583 ibm_thinkpad_ec_found = check_dmi_for_ec();
2584
2585 /* these handles are not required */
2586 IBM_HANDLE_INIT(vid);
2587 IBM_HANDLE_INIT(vid2);
2588 IBM_HANDLE_INIT(ledb);
2589 IBM_HANDLE_INIT(led);
2590 IBM_HANDLE_INIT(hkey);
2591 IBM_HANDLE_INIT(lght);
2592 IBM_HANDLE_INIT(cmos);
2593 #ifdef CONFIG_ACPI_IBM_DOCK
2594 IBM_HANDLE_INIT(dock);
2595 #endif
2596 IBM_HANDLE_INIT(pci);
2597 IBM_HANDLE_INIT(bay);
2598 if (bay_handle)
2599 IBM_HANDLE_INIT(bay_ej);
2600 IBM_HANDLE_INIT(bay2);
2601 if (bay2_handle)
2602 IBM_HANDLE_INIT(bay2_ej);
2603 IBM_HANDLE_INIT(beep);
2604 IBM_HANDLE_INIT(ecrd);
2605 IBM_HANDLE_INIT(ecwr);
2606 IBM_HANDLE_INIT(fans);
2607 IBM_HANDLE_INIT(gfan);
2608 IBM_HANDLE_INIT(sfan);
2609
2610 proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2611 if (!proc_dir) {
2612 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2613 return -ENODEV;
2614 }
2615 proc_dir->owner = THIS_MODULE;
2616
2617 for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2618 ret = ibm_init(&ibms[i]);
2619 if (ret >= 0 && *ibms[i].param)
2620 ret = ibms[i].write(ibms[i].param);
2621 if (ret < 0) {
2622 acpi_ibm_exit();
2623 return ret;
2624 }
2625 }
2626
2627 ibm_backlight_device = backlight_device_register("ibm", NULL,
2628 &ibm_backlight_data);
2629 if (IS_ERR(ibm_backlight_device)) {
2630 printk(IBM_ERR "Could not register ibm backlight device\n");
2631 ibm_backlight_device = NULL;
2632 acpi_ibm_exit();
2633 }
2634
2635 return 0;
2636 }
2637
2638 module_init(acpi_ibm_init);
2639 module_exit(acpi_ibm_exit);
Linux kernel - Deliverables
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