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ACPI: ibm-acpi: add support for the ultrabay on the T60,X60
[linux-2.6/cjktty.git] / drivers / acpi / ibm_acpi.c
blob392abbb7d2dc67a10fd966f000d8db5967729bd9
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/string.h>
81 #include <linux/proc_fs.h>
82 #include <linux/backlight.h>
83 #include <asm/uaccess.h>
84 #include <linux/dmi.h>
85 #include <linux/jiffies.h>
86 #include <linux/workqueue.h>
87
88 #include <acpi/acpi_drivers.h>
89 #include <acpi/acnamesp.h>
90
91 #define IBM_NAME "ibm"
92 #define IBM_DESC "IBM ThinkPad ACPI Extras"
93 #define IBM_FILE "ibm_acpi"
94 #define IBM_URL "http://ibm-acpi.sf.net/"
95
96 MODULE_AUTHOR("Borislav Deianov");
97 MODULE_DESCRIPTION(IBM_DESC);
98 MODULE_VERSION(IBM_VERSION);
99 MODULE_LICENSE("GPL");
100
101 #define IBM_DIR IBM_NAME
102
103 #define IBM_LOG IBM_FILE ": "
104 #define IBM_ERR KERN_ERR IBM_LOG
105 #define IBM_NOTICE KERN_NOTICE IBM_LOG
106 #define IBM_INFO KERN_INFO IBM_LOG
107 #define IBM_DEBUG KERN_DEBUG IBM_LOG
108
109 #define IBM_MAX_ACPI_ARGS 3
110
111 #define __unused __attribute__ ((unused))
112
113 static int experimental;
114 module_param(experimental, int, 0);
115
116 static acpi_handle root_handle = NULL;
117
118 #define IBM_HANDLE(object, parent, paths...) \
119 static acpi_handle object##_handle; \
120 static acpi_handle *object##_parent = &parent##_handle; \
121 static char *object##_path; \
122 static char *object##_paths[] = { paths }
123
124 /*
125 * The following models are supported to various degrees:
126 *
127 * 570, 600e, 600x, 770e, 770x
128 * A20m, A21e, A21m, A21p, A22p, A30, A30p, A31, A31p
129 * G40, G41
130 * R30, R31, R32, R40, R40e, R50, R50e, R50p, R51
131 * T20, T21, T22, T23, T30, T40, T40p, T41, T41p, T42, T42p, T43
132 * X20, X21, X22, X23, X24, X30, X31, X40
133 *
134 * The following models have no supported features:
135 *
136 * 240, 240x, i1400
137 *
138 * Still missing DSDTs for the following models:
139 *
140 * A20p, A22e, A22m
141 * R52
142 * S31
143 * T43p
144 */
145
146 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */
147 "\\_SB.PCI.ISA.EC", /* 570 */
148 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */
149 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
150 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */
151 "\\_SB.PCI0.ICH3.EC0", /* R31 */
152 "\\_SB.PCI0.LPC.EC", /* all others */
153 );
154
155 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
156 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
157 "\\_SB.PCI0.VID0", /* 770e */
158 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
159 "\\_SB.PCI0.AGP.VID", /* all others */
160 ); /* R30, R31 */
161
162 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */
163
164 IBM_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, T4x, X31, X40 */
165 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */
166 "\\CMS", /* R40, R40e */
167 ); /* all others */
168 #ifdef CONFIG_ACPI_IBM_DOCK
169 IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
170 "\\_SB.PCI0.DOCK", /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
171 "\\_SB.PCI0.PCI1.DOCK", /* all others */
172 "\\_SB.PCI.ISA.SLCE", /* 570 */
173 ); /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
174 #endif
175 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST", /* 570 */
176 "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
177 "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
178 "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
179 ); /* A21e, R30, R31 */
180
181 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
182 "_EJ0", /* all others */
183 ); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
184
185 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
186 "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
187 ); /* all others */
188
189 IBM_HANDLE(bay2_ej, bay2, "_EJ3", /* 600e/x, 770e, A3x */
190 "_EJ0", /* 770x */
191 ); /* all others */
192
193 /* don't list other alternatives as we install a notify handler on the 570 */
194 IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
195
196 IBM_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
197 "^HKEY", /* R30, R31 */
198 "HKEY", /* all others */
199 ); /* 570 */
200
201 IBM_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
202 IBM_HANDLE(ledb, ec, "LEDB"); /* G4x */
203
204 IBM_HANDLE(led, ec, "SLED", /* 570 */
205 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
206 "LED", /* all others */
207 ); /* R30, R31 */
208
209 IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */
210 IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
211 IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */
212 IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
213
214 IBM_HANDLE(gfan, ec, "GFAN", /* 570 */
215 "\\FSPD", /* 600e/x, 770e, 770x */
216 ); /* all others */
217
218 IBM_HANDLE(sfan, ec, "SFAN", /* 570 */
219 "JFNS", /* 770x-JL */
220 ); /* all others */
221
222 #define IBM_HKEY_HID "IBM0068"
223 #define IBM_PCI_HID "PNP0A03"
224
225 enum thermal_access_mode {
226 IBMACPI_THERMAL_NONE = 0, /* No thermal support */
227 IBMACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
228 IBMACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
229 IBMACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
230 IBMACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
231 };
232
233 #define IBMACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
234 struct ibm_thermal_sensors_struct {
235 s32 temp[IBMACPI_MAX_THERMAL_SENSORS];
236 };
237
238 /*
239 * FAN ACCESS MODES
240 *
241 * IBMACPI_FAN_RD_ACPI_GFAN:
242 * ACPI GFAN method: returns fan level
243 *
244 * see IBMACPI_FAN_WR_ACPI_SFAN
245 * EC 0x2f not available if GFAN exists
246 *
247 * IBMACPI_FAN_WR_ACPI_SFAN:
248 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
249 *
250 * EC 0x2f might be available *for reading*, but never for writing.
251 *
252 * IBMACPI_FAN_WR_TPEC:
253 * ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
254 * on almost all ThinkPads
255 *
256 * Fan speed changes of any sort (including those caused by the
257 * disengaged mode) are usually done slowly by the firmware as the
258 * maximum ammount of fan duty cycle change per second seems to be
259 * limited.
260 *
261 * Reading is not available if GFAN exists.
262 * Writing is not available if SFAN exists.
263 *
264 * Bits
265 * 7 automatic mode engaged;
266 * (default operation mode of the ThinkPad)
267 * fan level is ignored in this mode.
268 * 6 disengage mode (takes precedence over bit 7);
269 * not available on all thinkpads. May disable
270 * the tachometer, and speeds up fan to 100% duty-cycle,
271 * which speeds it up far above the standard RPM
272 * levels. It is not impossible that it could cause
273 * hardware damage.
274 * 5-3 unused in some models. Extra bits for fan level
275 * in others, but still useless as all values above
276 * 7 map to the same speed as level 7 in these models.
277 * 2-0 fan level (0..7 usually)
278 * 0x00 = stop
279 * 0x07 = max (set when temperatures critical)
280 * Some ThinkPads may have other levels, see
281 * IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
282 *
283 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
284 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT
285 * does so, its initial value is meaningless (0x07).
286 *
287 * For firmware bugs, refer to:
288 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
289 *
290 * ----
291 *
292 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
293 * Main fan tachometer reading (in RPM)
294 *
295 * This register is present on all ThinkPads with a new-style EC, and
296 * it is known not to be present on the A21m/e, and T22, as there is
297 * something else in offset 0x84 according to the ACPI DSDT. Other
298 * ThinkPads from this same time period (and earlier) probably lack the
299 * tachometer as well.
300 *
301 * Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
302 * was never fixed by IBM to report the EC firmware version string
303 * probably support the tachometer (like the early X models), so
304 * detecting it is quite hard. We need more data to know for sure.
305 *
306 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
307 * might result.
308 *
309 * FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
310 * register is not invalidated in ThinkPads that disable tachometer
311 * readings. Thus, the tachometer readings go stale.
312 *
313 * For firmware bugs, refer to:
314 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
315 *
316 * IBMACPI_FAN_WR_ACPI_FANS:
317 * ThinkPad X31, X40, X41. Not available in the X60.
318 *
319 * FANS ACPI handle: takes three arguments: low speed, medium speed,
320 * high speed. ACPI DSDT seems to map these three speeds to levels
321 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
322 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
323 *
324 * The speeds are stored on handles
325 * (FANA:FAN9), (FANC:FANB), (FANE:FAND).
326 *
327 * There are three default speed sets, acessible as handles:
328 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
329 *
330 * ACPI DSDT switches which set is in use depending on various
331 * factors.
332 *
333 * IBMACPI_FAN_WR_TPEC is also available and should be used to
334 * command the fan. The X31/X40/X41 seems to have 8 fan levels,
335 * but the ACPI tables just mention level 7.
336 */
337
338 enum fan_status_access_mode {
339 IBMACPI_FAN_NONE = 0, /* No fan status or control */
340 IBMACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
341 IBMACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
342 };
343
344 enum fan_control_access_mode {
345 IBMACPI_FAN_WR_NONE = 0, /* No fan control */
346 IBMACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
347 IBMACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
348 IBMACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
349 };
350
351 enum fan_control_commands {
352 IBMACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
353 IBMACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
354 IBMACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
355 * and also watchdog cmd */
356 };
357
358 enum { /* Fan control constants */
359 fan_status_offset = 0x2f, /* EC register 0x2f */
360 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
361 * 0x84 must be read before 0x85 */
362
363 IBMACPI_FAN_EC_DISENGAGED = 0x40, /* EC mode: tachometer
364 * disengaged */
365 IBMACPI_FAN_EC_AUTO = 0x80, /* EC mode: auto fan
366 * control */
367 };
368
369 static char *ibm_thinkpad_ec_found = NULL;
370
371 struct ibm_struct {
372 char *name;
373 char param[32];
374
375 char *hid;
376 struct acpi_driver *driver;
377
378 int (*init) (void);
379 int (*read) (char *);
380 int (*write) (char *);
381 void (*exit) (void);
382
383 void (*notify) (struct ibm_struct *, u32);
384 acpi_handle *handle;
385 int type;
386 struct acpi_device *device;
387
388 int driver_registered;
389 int proc_created;
390 int init_called;
391 int notify_installed;
392
393 int experimental;
394 };
395
396 static struct proc_dir_entry *proc_dir = NULL;
397
398 static struct backlight_device *ibm_backlight_device;
399
400 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
401 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
402 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
403
404 static int acpi_evalf(acpi_handle handle,
405 void *res, char *method, char *fmt, ...)
406 {
407 char *fmt0 = fmt;
408 struct acpi_object_list params;
409 union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
410 struct acpi_buffer result, *resultp;
411 union acpi_object out_obj;
412 acpi_status status;
413 va_list ap;
414 char res_type;
415 int success;
416 int quiet;
417
418 if (!*fmt) {
419 printk(IBM_ERR "acpi_evalf() called with empty format\n");
420 return 0;
421 }
422
423 if (*fmt == 'q') {
424 quiet = 1;
425 fmt++;
426 } else
427 quiet = 0;
428
429 res_type = *(fmt++);
430
431 params.count = 0;
432 params.pointer = &in_objs[0];
433
434 va_start(ap, fmt);
435 while (*fmt) {
436 char c = *(fmt++);
437 switch (c) {
438 case 'd': /* int */
439 in_objs[params.count].integer.value = va_arg(ap, int);
440 in_objs[params.count++].type = ACPI_TYPE_INTEGER;
441 break;
442 /* add more types as needed */
443 default:
444 printk(IBM_ERR "acpi_evalf() called "
445 "with invalid format character '%c'\n", c);
446 return 0;
447 }
448 }
449 va_end(ap);
450
451 if (res_type != 'v') {
452 result.length = sizeof(out_obj);
453 result.pointer = &out_obj;
454 resultp = &result;
455 } else
456 resultp = NULL;
457
458 status = acpi_evaluate_object(handle, method, &params, resultp);
459
460 switch (res_type) {
461 case 'd': /* int */
462 if (res)
463 *(int *)res = out_obj.integer.value;
464 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
465 break;
466 case 'v': /* void */
467 success = status == AE_OK;
468 break;
469 /* add more types as needed */
470 default:
471 printk(IBM_ERR "acpi_evalf() called "
472 "with invalid format character '%c'\n", res_type);
473 return 0;
474 }
475
476 if (!success && !quiet)
477 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
478 method, fmt0, status);
479
480 return success;
481 }
482
483 static void __unused acpi_print_int(acpi_handle handle, char *method)
484 {
485 int i;
486
487 if (acpi_evalf(handle, &i, method, "d"))
488 printk(IBM_INFO "%s = 0x%x\n", method, i);
489 else
490 printk(IBM_ERR "error calling %s\n", method);
491 }
492
493 static char *next_cmd(char **cmds)
494 {
495 char *start = *cmds;
496 char *end;
497
498 while ((end = strchr(start, ',')) && end == start)
499 start = end + 1;
500
501 if (!end)
502 return NULL;
503
504 *end = 0;
505 *cmds = end + 1;
506 return start;
507 }
508
509 static int driver_init(void)
510 {
511 printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
512 printk(IBM_INFO "%s\n", IBM_URL);
513
514 return 0;
515 }
516
517 static int driver_read(char *p)
518 {
519 int len = 0;
520
521 len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
522 len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
523
524 return len;
525 }
526
527 static int hotkey_supported;
528 static int hotkey_mask_supported;
529 static int hotkey_orig_status;
530 static int hotkey_orig_mask;
531
532 static int hotkey_get(int *status, int *mask)
533 {
534 if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
535 return 0;
536
537 if (hotkey_mask_supported)
538 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
539 return 0;
540
541 return 1;
542 }
543
544 static int hotkey_set(int status, int mask)
545 {
546 int i;
547
548 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
549 return 0;
550
551 if (hotkey_mask_supported)
552 for (i = 0; i < 32; i++) {
553 int bit = ((1 << i) & mask) != 0;
554 if (!acpi_evalf(hkey_handle,
555 NULL, "MHKM", "vdd", i + 1, bit))
556 return 0;
557 }
558
559 return 1;
560 }
561
562 static int hotkey_init(void)
563 {
564 /* hotkey not supported on 570 */
565 hotkey_supported = hkey_handle != NULL;
566
567 if (hotkey_supported) {
568 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
569 A30, R30, R31, T20-22, X20-21, X22-24 */
570 hotkey_mask_supported =
571 acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
572
573 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
574 return -ENODEV;
575 }
576
577 return 0;
578 }
579
580 static int hotkey_read(char *p)
581 {
582 int status, mask;
583 int len = 0;
584
585 if (!hotkey_supported) {
586 len += sprintf(p + len, "status:\t\tnot supported\n");
587 return len;
588 }
589
590 if (!hotkey_get(&status, &mask))
591 return -EIO;
592
593 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
594 if (hotkey_mask_supported) {
595 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
596 len += sprintf(p + len,
597 "commands:\tenable, disable, reset, <mask>\n");
598 } else {
599 len += sprintf(p + len, "mask:\t\tnot supported\n");
600 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
601 }
602
603 return len;
604 }
605
606 static int hotkey_write(char *buf)
607 {
608 int status, mask;
609 char *cmd;
610 int do_cmd = 0;
611
612 if (!hotkey_supported)
613 return -ENODEV;
614
615 if (!hotkey_get(&status, &mask))
616 return -EIO;
617
618 while ((cmd = next_cmd(&buf))) {
619 if (strlencmp(cmd, "enable") == 0) {
620 status = 1;
621 } else if (strlencmp(cmd, "disable") == 0) {
622 status = 0;
623 } else if (strlencmp(cmd, "reset") == 0) {
624 status = hotkey_orig_status;
625 mask = hotkey_orig_mask;
626 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
627 /* mask set */
628 } else if (sscanf(cmd, "%x", &mask) == 1) {
629 /* mask set */
630 } else
631 return -EINVAL;
632 do_cmd = 1;
633 }
634
635 if (do_cmd && !hotkey_set(status, mask))
636 return -EIO;
637
638 return 0;
639 }
640
641 static void hotkey_exit(void)
642 {
643 if (hotkey_supported)
644 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
645 }
646
647 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
648 {
649 int hkey;
650
651 if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
652 acpi_bus_generate_event(ibm->device, event, hkey);
653 else {
654 printk(IBM_ERR "unknown hotkey event %d\n", event);
655 acpi_bus_generate_event(ibm->device, event, 0);
656 }
657 }
658
659 static int bluetooth_supported;
660
661 static int bluetooth_init(void)
662 {
663 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
664 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
665 bluetooth_supported = hkey_handle &&
666 acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
667
668 return 0;
669 }
670
671 static int bluetooth_status(void)
672 {
673 int status;
674
675 if (!bluetooth_supported ||
676 !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
677 status = 0;
678
679 return status;
680 }
681
682 static int bluetooth_read(char *p)
683 {
684 int len = 0;
685 int status = bluetooth_status();
686
687 if (!bluetooth_supported)
688 len += sprintf(p + len, "status:\t\tnot supported\n");
689 else if (!(status & 1))
690 len += sprintf(p + len, "status:\t\tnot installed\n");
691 else {
692 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
693 len += sprintf(p + len, "commands:\tenable, disable\n");
694 }
695
696 return len;
697 }
698
699 static int bluetooth_write(char *buf)
700 {
701 int status = bluetooth_status();
702 char *cmd;
703 int do_cmd = 0;
704
705 if (!bluetooth_supported)
706 return -ENODEV;
707
708 while ((cmd = next_cmd(&buf))) {
709 if (strlencmp(cmd, "enable") == 0) {
710 status |= 2;
711 } else if (strlencmp(cmd, "disable") == 0) {
712 status &= ~2;
713 } else
714 return -EINVAL;
715 do_cmd = 1;
716 }
717
718 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
719 return -EIO;
720
721 return 0;
722 }
723
724 static int wan_supported;
725
726 static int wan_init(void)
727 {
728 wan_supported = hkey_handle &&
729 acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
730
731 return 0;
732 }
733
734 static int wan_status(void)
735 {
736 int status;
737
738 if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
739 status = 0;
740
741 return status;
742 }
743
744 static int wan_read(char *p)
745 {
746 int len = 0;
747 int status = wan_status();
748
749 if (!wan_supported)
750 len += sprintf(p + len, "status:\t\tnot supported\n");
751 else if (!(status & 1))
752 len += sprintf(p + len, "status:\t\tnot installed\n");
753 else {
754 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
755 len += sprintf(p + len, "commands:\tenable, disable\n");
756 }
757
758 return len;
759 }
760
761 static int wan_write(char *buf)
762 {
763 int status = wan_status();
764 char *cmd;
765 int do_cmd = 0;
766
767 if (!wan_supported)
768 return -ENODEV;
769
770 while ((cmd = next_cmd(&buf))) {
771 if (strlencmp(cmd, "enable") == 0) {
772 status |= 2;
773 } else if (strlencmp(cmd, "disable") == 0) {
774 status &= ~2;
775 } else
776 return -EINVAL;
777 do_cmd = 1;
778 }
779
780 if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
781 return -EIO;
782
783 return 0;
784 }
785
786 static int video_supported;
787 static int video_orig_autosw;
788
789 #define VIDEO_570 1
790 #define VIDEO_770 2
791 #define VIDEO_NEW 3
792
793 static int video_init(void)
794 {
795 int ivga;
796
797 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
798 /* G41, assume IVGA doesn't change */
799 vid_handle = vid2_handle;
800
801 if (!vid_handle)
802 /* video switching not supported on R30, R31 */
803 video_supported = 0;
804 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
805 /* 570 */
806 video_supported = VIDEO_570;
807 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
808 /* 600e/x, 770e, 770x */
809 video_supported = VIDEO_770;
810 else
811 /* all others */
812 video_supported = VIDEO_NEW;
813
814 return 0;
815 }
816
817 static int video_status(void)
818 {
819 int status = 0;
820 int i;
821
822 if (video_supported == VIDEO_570) {
823 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
824 status = i & 3;
825 } else if (video_supported == VIDEO_770) {
826 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
827 status |= 0x01 * i;
828 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
829 status |= 0x02 * i;
830 } else if (video_supported == VIDEO_NEW) {
831 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
832 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
833 status |= 0x02 * i;
834
835 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
836 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
837 status |= 0x01 * i;
838 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
839 status |= 0x08 * i;
840 }
841
842 return status;
843 }
844
845 static int video_autosw(void)
846 {
847 int autosw = 0;
848
849 if (video_supported == VIDEO_570)
850 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
851 else if (video_supported == VIDEO_770 || video_supported == VIDEO_NEW)
852 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
853
854 return autosw & 1;
855 }
856
857 static int video_read(char *p)
858 {
859 int status = video_status();
860 int autosw = video_autosw();
861 int len = 0;
862
863 if (!video_supported) {
864 len += sprintf(p + len, "status:\t\tnot supported\n");
865 return len;
866 }
867
868 len += sprintf(p + len, "status:\t\tsupported\n");
869 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
870 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
871 if (video_supported == VIDEO_NEW)
872 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
873 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
874 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
875 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
876 if (video_supported == VIDEO_NEW)
877 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
878 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
879 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
880
881 return len;
882 }
883
884 static int video_switch(void)
885 {
886 int autosw = video_autosw();
887 int ret;
888
889 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
890 return -EIO;
891 ret = video_supported == VIDEO_570 ?
892 acpi_evalf(ec_handle, NULL, "_Q16", "v") :
893 acpi_evalf(vid_handle, NULL, "VSWT", "v");
894 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
895
896 return ret;
897 }
898
899 static int video_expand(void)
900 {
901 if (video_supported == VIDEO_570)
902 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
903 else if (video_supported == VIDEO_770)
904 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
905 else
906 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
907 }
908
909 static int video_switch2(int status)
910 {
911 int ret;
912
913 if (video_supported == VIDEO_570) {
914 ret = acpi_evalf(NULL, NULL,
915 "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
916 } else if (video_supported == VIDEO_770) {
917 int autosw = video_autosw();
918 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
919 return -EIO;
920
921 ret = acpi_evalf(vid_handle, NULL,
922 "ASWT", "vdd", status * 0x100, 0);
923
924 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
925 } else {
926 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
927 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
928 }
929
930 return ret;
931 }
932
933 static int video_write(char *buf)
934 {
935 char *cmd;
936 int enable, disable, status;
937
938 if (!video_supported)
939 return -ENODEV;
940
941 enable = disable = 0;
942
943 while ((cmd = next_cmd(&buf))) {
944 if (strlencmp(cmd, "lcd_enable") == 0) {
945 enable |= 0x01;
946 } else if (strlencmp(cmd, "lcd_disable") == 0) {
947 disable |= 0x01;
948 } else if (strlencmp(cmd, "crt_enable") == 0) {
949 enable |= 0x02;
950 } else if (strlencmp(cmd, "crt_disable") == 0) {
951 disable |= 0x02;
952 } else if (video_supported == VIDEO_NEW &&
953 strlencmp(cmd, "dvi_enable") == 0) {
954 enable |= 0x08;
955 } else if (video_supported == VIDEO_NEW &&
956 strlencmp(cmd, "dvi_disable") == 0) {
957 disable |= 0x08;
958 } else if (strlencmp(cmd, "auto_enable") == 0) {
959 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
960 return -EIO;
961 } else if (strlencmp(cmd, "auto_disable") == 0) {
962 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
963 return -EIO;
964 } else if (strlencmp(cmd, "video_switch") == 0) {
965 if (!video_switch())
966 return -EIO;
967 } else if (strlencmp(cmd, "expand_toggle") == 0) {
968 if (!video_expand())
969 return -EIO;
970 } else
971 return -EINVAL;
972 }
973
974 if (enable || disable) {
975 status = (video_status() & 0x0f & ~disable) | enable;
976 if (!video_switch2(status))
977 return -EIO;
978 }
979
980 return 0;
981 }
982
983 static void video_exit(void)
984 {
985 acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
986 }
987
988 static int light_supported;
989 static int light_status_supported;
990
991 static int light_init(void)
992 {
993 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
994 light_supported = (cmos_handle || lght_handle) && !ledb_handle;
995
996 if (light_supported)
997 /* light status not supported on
998 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
999 light_status_supported = acpi_evalf(ec_handle, NULL,
1000 "KBLT", "qv");
1001
1002 return 0;
1003 }
1004
1005 static int light_read(char *p)
1006 {
1007 int len = 0;
1008 int status = 0;
1009
1010 if (!light_supported) {
1011 len += sprintf(p + len, "status:\t\tnot supported\n");
1012 } else if (!light_status_supported) {
1013 len += sprintf(p + len, "status:\t\tunknown\n");
1014 len += sprintf(p + len, "commands:\ton, off\n");
1015 } else {
1016 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1017 return -EIO;
1018 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1019 len += sprintf(p + len, "commands:\ton, off\n");
1020 }
1021
1022 return len;
1023 }
1024
1025 static int light_write(char *buf)
1026 {
1027 int cmos_cmd, lght_cmd;
1028 char *cmd;
1029 int success;
1030
1031 if (!light_supported)
1032 return -ENODEV;
1033
1034 while ((cmd = next_cmd(&buf))) {
1035 if (strlencmp(cmd, "on") == 0) {
1036 cmos_cmd = 0x0c;
1037 lght_cmd = 1;
1038 } else if (strlencmp(cmd, "off") == 0) {
1039 cmos_cmd = 0x0d;
1040 lght_cmd = 0;
1041 } else
1042 return -EINVAL;
1043
1044 success = cmos_handle ?
1045 acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1046 acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1047 if (!success)
1048 return -EIO;
1049 }
1050
1051 return 0;
1052 }
1053
1054 static int _sta(acpi_handle handle)
1055 {
1056 int status;
1057
1058 if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
1059 status = 0;
1060
1061 return status;
1062 }
1063
1064 #ifdef CONFIG_ACPI_IBM_DOCK
1065 #define dock_docked() (_sta(dock_handle) & 1)
1066
1067 static int dock_read(char *p)
1068 {
1069 int len = 0;
1070 int docked = dock_docked();
1071
1072 if (!dock_handle)
1073 len += sprintf(p + len, "status:\t\tnot supported\n");
1074 else if (!docked)
1075 len += sprintf(p + len, "status:\t\tundocked\n");
1076 else {
1077 len += sprintf(p + len, "status:\t\tdocked\n");
1078 len += sprintf(p + len, "commands:\tdock, undock\n");
1079 }
1080
1081 return len;
1082 }
1083
1084 static int dock_write(char *buf)
1085 {
1086 char *cmd;
1087
1088 if (!dock_docked())
1089 return -ENODEV;
1090
1091 while ((cmd = next_cmd(&buf))) {
1092 if (strlencmp(cmd, "undock") == 0) {
1093 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1094 !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1095 return -EIO;
1096 } else if (strlencmp(cmd, "dock") == 0) {
1097 if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1098 return -EIO;
1099 } else
1100 return -EINVAL;
1101 }
1102
1103 return 0;
1104 }
1105
1106 static void dock_notify(struct ibm_struct *ibm, u32 event)
1107 {
1108 int docked = dock_docked();
1109 int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1110
1111 if (event == 1 && !pci) /* 570 */
1112 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1113 else if (event == 1 && pci) /* 570 */
1114 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1115 else if (event == 3 && docked)
1116 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1117 else if (event == 3 && !docked)
1118 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1119 else if (event == 0 && docked)
1120 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1121 else {
1122 printk(IBM_ERR "unknown dock event %d, status %d\n",
1123 event, _sta(dock_handle));
1124 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1125 }
1126 }
1127 #endif
1128
1129 static int bay_status_supported;
1130 static int bay_status2_supported;
1131 static int bay_eject_supported;
1132 static int bay_eject2_supported;
1133
1134 static int bay_init(void)
1135 {
1136 bay_status_supported = bay_handle &&
1137 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1138 bay_status2_supported = bay2_handle &&
1139 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1140
1141 bay_eject_supported = bay_handle && bay_ej_handle &&
1142 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1143 bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1144 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1145
1146 return 0;
1147 }
1148
1149 #define bay_occupied(b) (_sta(b##_handle) & 1)
1150
1151 static int bay_read(char *p)
1152 {
1153 int len = 0;
1154 int occupied = bay_occupied(bay);
1155 int occupied2 = bay_occupied(bay2);
1156 int eject, eject2;
1157
1158 len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1159 (occupied ? "occupied" : "unoccupied") :
1160 "not supported");
1161 if (bay_status2_supported)
1162 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1163 "occupied" : "unoccupied");
1164
1165 eject = bay_eject_supported && occupied;
1166 eject2 = bay_eject2_supported && occupied2;
1167
1168 if (eject && eject2)
1169 len += sprintf(p + len, "commands:\teject, eject2\n");
1170 else if (eject)
1171 len += sprintf(p + len, "commands:\teject\n");
1172 else if (eject2)
1173 len += sprintf(p + len, "commands:\teject2\n");
1174
1175 return len;
1176 }
1177
1178 static int bay_write(char *buf)
1179 {
1180 char *cmd;
1181
1182 if (!bay_eject_supported && !bay_eject2_supported)
1183 return -ENODEV;
1184
1185 while ((cmd = next_cmd(&buf))) {
1186 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1187 if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1188 return -EIO;
1189 } else if (bay_eject2_supported &&
1190 strlencmp(cmd, "eject2") == 0) {
1191 if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1192 return -EIO;
1193 } else
1194 return -EINVAL;
1195 }
1196
1197 return 0;
1198 }
1199
1200 static void bay_notify(struct ibm_struct *ibm, u32 event)
1201 {
1202 acpi_bus_generate_event(ibm->device, event, 0);
1203 }
1204
1205 static int cmos_read(char *p)
1206 {
1207 int len = 0;
1208
1209 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1210 R30, R31, T20-22, X20-21 */
1211 if (!cmos_handle)
1212 len += sprintf(p + len, "status:\t\tnot supported\n");
1213 else {
1214 len += sprintf(p + len, "status:\t\tsupported\n");
1215 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1216 }
1217
1218 return len;
1219 }
1220
1221 static int cmos_eval(int cmos_cmd)
1222 {
1223 if (cmos_handle)
1224 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1225 else
1226 return 1;
1227 }
1228
1229 static int cmos_write(char *buf)
1230 {
1231 char *cmd;
1232 int cmos_cmd;
1233
1234 if (!cmos_handle)
1235 return -EINVAL;
1236
1237 while ((cmd = next_cmd(&buf))) {
1238 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1239 cmos_cmd >= 0 && cmos_cmd <= 21) {
1240 /* cmos_cmd set */
1241 } else
1242 return -EINVAL;
1243
1244 if (!cmos_eval(cmos_cmd))
1245 return -EIO;
1246 }
1247
1248 return 0;
1249 }
1250
1251 static int led_supported;
1252
1253 #define LED_570 1
1254 #define LED_OLD 2
1255 #define LED_NEW 3
1256
1257 static int led_init(void)
1258 {
1259 if (!led_handle)
1260 /* led not supported on R30, R31 */
1261 led_supported = 0;
1262 else if (strlencmp(led_path, "SLED") == 0)
1263 /* 570 */
1264 led_supported = LED_570;
1265 else if (strlencmp(led_path, "SYSL") == 0)
1266 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1267 led_supported = LED_OLD;
1268 else
1269 /* all others */
1270 led_supported = LED_NEW;
1271
1272 return 0;
1273 }
1274
1275 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1276
1277 static int led_read(char *p)
1278 {
1279 int len = 0;
1280
1281 if (!led_supported) {
1282 len += sprintf(p + len, "status:\t\tnot supported\n");
1283 return len;
1284 }
1285 len += sprintf(p + len, "status:\t\tsupported\n");
1286
1287 if (led_supported == LED_570) {
1288 /* 570 */
1289 int i, status;
1290 for (i = 0; i < 8; i++) {
1291 if (!acpi_evalf(ec_handle,
1292 &status, "GLED", "dd", 1 << i))
1293 return -EIO;
1294 len += sprintf(p + len, "%d:\t\t%s\n",
1295 i, led_status(status));
1296 }
1297 }
1298
1299 len += sprintf(p + len, "commands:\t"
1300 "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1301
1302 return len;
1303 }
1304
1305 /* off, on, blink */
1306 static const int led_sled_arg1[] = { 0, 1, 3 };
1307 static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
1308 static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
1309 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1310
1311 #define EC_HLCL 0x0c
1312 #define EC_HLBL 0x0d
1313 #define EC_HLMS 0x0e
1314
1315 static int led_write(char *buf)
1316 {
1317 char *cmd;
1318 int led, ind, ret;
1319
1320 if (!led_supported)
1321 return -ENODEV;
1322
1323 while ((cmd = next_cmd(&buf))) {
1324 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1325 return -EINVAL;
1326
1327 if (strstr(cmd, "off")) {
1328 ind = 0;
1329 } else if (strstr(cmd, "on")) {
1330 ind = 1;
1331 } else if (strstr(cmd, "blink")) {
1332 ind = 2;
1333 } else
1334 return -EINVAL;
1335
1336 if (led_supported == LED_570) {
1337 /* 570 */
1338 led = 1 << led;
1339 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1340 led, led_sled_arg1[ind]))
1341 return -EIO;
1342 } else if (led_supported == LED_OLD) {
1343 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1344 led = 1 << led;
1345 ret = ec_write(EC_HLMS, led);
1346 if (ret >= 0)
1347 ret =
1348 ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
1349 if (ret >= 0)
1350 ret =
1351 ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
1352 if (ret < 0)
1353 return ret;
1354 } else {
1355 /* all others */
1356 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1357 led, led_led_arg1[ind]))
1358 return -EIO;
1359 }
1360 }
1361
1362 return 0;
1363 }
1364
1365 static int beep_read(char *p)
1366 {
1367 int len = 0;
1368
1369 if (!beep_handle)
1370 len += sprintf(p + len, "status:\t\tnot supported\n");
1371 else {
1372 len += sprintf(p + len, "status:\t\tsupported\n");
1373 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1374 }
1375
1376 return len;
1377 }
1378
1379 static int beep_write(char *buf)
1380 {
1381 char *cmd;
1382 int beep_cmd;
1383
1384 if (!beep_handle)
1385 return -ENODEV;
1386
1387 while ((cmd = next_cmd(&buf))) {
1388 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1389 beep_cmd >= 0 && beep_cmd <= 17) {
1390 /* beep_cmd set */
1391 } else
1392 return -EINVAL;
1393 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1394 return -EIO;
1395 }
1396
1397 return 0;
1398 }
1399
1400 static int acpi_ec_read(int i, u8 * p)
1401 {
1402 int v;
1403
1404 if (ecrd_handle) {
1405 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1406 return 0;
1407 *p = v;
1408 } else {
1409 if (ec_read(i, p) < 0)
1410 return 0;
1411 }
1412
1413 return 1;
1414 }
1415
1416 static int acpi_ec_write(int i, u8 v)
1417 {
1418 if (ecwr_handle) {
1419 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1420 return 0;
1421 } else {
1422 if (ec_write(i, v) < 0)
1423 return 0;
1424 }
1425
1426 return 1;
1427 }
1428
1429 static enum thermal_access_mode thermal_read_mode;
1430
1431 static int thermal_init(void)
1432 {
1433 u8 t, ta1, ta2;
1434 int i;
1435 int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1436
1437 if (ibm_thinkpad_ec_found && experimental) {
1438 /*
1439 * Direct EC access mode: sensors at registers
1440 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for
1441 * non-implemented, thermal sensors return 0x80 when
1442 * not available
1443 */
1444
1445 ta1 = ta2 = 0;
1446 for (i = 0; i < 8; i++) {
1447 if (likely(acpi_ec_read(0x78 + i, &t))) {
1448 ta1 |= t;
1449 } else {
1450 ta1 = 0;
1451 break;
1452 }
1453 if (likely(acpi_ec_read(0xC0 + i, &t))) {
1454 ta2 |= t;
1455 } else {
1456 ta1 = 0;
1457 break;
1458 }
1459 }
1460 if (ta1 == 0) {
1461 /* This is sheer paranoia, but we handle it anyway */
1462 if (acpi_tmp7) {
1463 printk(IBM_ERR
1464 "ThinkPad ACPI EC access misbehaving, "
1465 "falling back to ACPI TMPx access mode\n");
1466 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1467 } else {
1468 printk(IBM_ERR
1469 "ThinkPad ACPI EC access misbehaving, "
1470 "disabling thermal sensors access\n");
1471 thermal_read_mode = IBMACPI_THERMAL_NONE;
1472 }
1473 } else {
1474 thermal_read_mode =
1475 (ta2 != 0) ?
1476 IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
1477 }
1478 } else if (acpi_tmp7) {
1479 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1480 /* 600e/x, 770e, 770x */
1481 thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
1482 } else {
1483 /* Standard ACPI TMPx access, max 8 sensors */
1484 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1485 }
1486 } else {
1487 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1488 thermal_read_mode = IBMACPI_THERMAL_NONE;
1489 }
1490
1491 return 0;
1492 }
1493
1494 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1495 {
1496 int i, t;
1497 s8 tmp;
1498 char tmpi[] = "TMPi";
1499
1500 if (!s)
1501 return -EINVAL;
1502
1503 switch (thermal_read_mode) {
1504 #if IBMACPI_MAX_THERMAL_SENSORS >= 16
1505 case IBMACPI_THERMAL_TPEC_16:
1506 for (i = 0; i < 8; i++) {
1507 if (!acpi_ec_read(0xC0 + i, &tmp))
1508 return -EIO;
1509 s->temp[i + 8] = tmp * 1000;
1510 }
1511 /* fallthrough */
1512 #endif
1513 case IBMACPI_THERMAL_TPEC_8:
1514 for (i = 0; i < 8; i++) {
1515 if (!acpi_ec_read(0x78 + i, &tmp))
1516 return -EIO;
1517 s->temp[i] = tmp * 1000;
1518 }
1519 return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
1520
1521 case IBMACPI_THERMAL_ACPI_UPDT:
1522 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1523 return -EIO;
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 - 2732) * 100;
1529 }
1530 return 8;
1531
1532 case IBMACPI_THERMAL_ACPI_TMP07:
1533 for (i = 0; i < 8; i++) {
1534 tmpi[3] = '0' + i;
1535 if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1536 return -EIO;
1537 s->temp[i] = t * 1000;
1538 }
1539 return 8;
1540
1541 case IBMACPI_THERMAL_NONE:
1542 default:
1543 return 0;
1544 }
1545 }
1546
1547 static int thermal_read(char *p)
1548 {
1549 int len = 0;
1550 int n, i;
1551 struct ibm_thermal_sensors_struct t;
1552
1553 n = thermal_get_sensors(&t);
1554 if (unlikely(n < 0))
1555 return n;
1556
1557 len += sprintf(p + len, "temperatures:\t");
1558
1559 if (n > 0) {
1560 for (i = 0; i < (n - 1); i++)
1561 len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1562 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1563 } else
1564 len += sprintf(p + len, "not supported\n");
1565
1566 return len;
1567 }
1568
1569 static u8 ecdump_regs[256];
1570
1571 static int ecdump_read(char *p)
1572 {
1573 int len = 0;
1574 int i, j;
1575 u8 v;
1576
1577 len += sprintf(p + len, "EC "
1578 " +00 +01 +02 +03 +04 +05 +06 +07"
1579 " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1580 for (i = 0; i < 256; i += 16) {
1581 len += sprintf(p + len, "EC 0x%02x:", i);
1582 for (j = 0; j < 16; j++) {
1583 if (!acpi_ec_read(i + j, &v))
1584 break;
1585 if (v != ecdump_regs[i + j])
1586 len += sprintf(p + len, " *%02x", v);
1587 else
1588 len += sprintf(p + len, " %02x", v);
1589 ecdump_regs[i + j] = v;
1590 }
1591 len += sprintf(p + len, "\n");
1592 if (j != 16)
1593 break;
1594 }
1595
1596 /* These are way too dangerous to advertise openly... */
1597 #if 0
1598 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1599 " (<offset> is 00-ff, <value> is 00-ff)\n");
1600 len += sprintf(p + len, "commands:\t0x<offset> <value> "
1601 " (<offset> is 00-ff, <value> is 0-255)\n");
1602 #endif
1603 return len;
1604 }
1605
1606 static int ecdump_write(char *buf)
1607 {
1608 char *cmd;
1609 int i, v;
1610
1611 while ((cmd = next_cmd(&buf))) {
1612 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1613 /* i and v set */
1614 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1615 /* i and v set */
1616 } else
1617 return -EINVAL;
1618 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1619 if (!acpi_ec_write(i, v))
1620 return -EIO;
1621 } else
1622 return -EINVAL;
1623 }
1624
1625 return 0;
1626 }
1627
1628 static int brightness_offset = 0x31;
1629
1630 static int brightness_get(struct backlight_device *bd)
1631 {
1632 u8 level;
1633 if (!acpi_ec_read(brightness_offset, &level))
1634 return -EIO;
1635
1636 level &= 0x7;
1637 return level;
1638 }
1639
1640 static int brightness_read(char *p)
1641 {
1642 int len = 0;
1643 int level;
1644
1645 if ((level = brightness_get(NULL)) < 0) {
1646 len += sprintf(p + len, "level:\t\tunreadable\n");
1647 } else {
1648 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1649 len += sprintf(p + len, "commands:\tup, down\n");
1650 len += sprintf(p + len, "commands:\tlevel <level>"
1651 " (<level> is 0-7)\n");
1652 }
1653
1654 return len;
1655 }
1656
1657 #define BRIGHTNESS_UP 4
1658 #define BRIGHTNESS_DOWN 5
1659
1660 static int brightness_set(int value)
1661 {
1662 int cmos_cmd, inc, i;
1663 int current_value = brightness_get(NULL);
1664
1665 value &= 7;
1666
1667 cmos_cmd = value > current_value ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
1668 inc = value > current_value ? 1 : -1;
1669 for (i = current_value; i != value; i += inc) {
1670 if (!cmos_eval(cmos_cmd))
1671 return -EIO;
1672 if (!acpi_ec_write(brightness_offset, i + inc))
1673 return -EIO;
1674 }
1675
1676 return 0;
1677 }
1678
1679 static int brightness_write(char *buf)
1680 {
1681 int level;
1682 int new_level;
1683 char *cmd;
1684
1685 while ((cmd = next_cmd(&buf))) {
1686 if ((level = brightness_get(NULL)) < 0)
1687 return level;
1688 level &= 7;
1689
1690 if (strlencmp(cmd, "up") == 0) {
1691 new_level = level == 7 ? 7 : level + 1;
1692 } else if (strlencmp(cmd, "down") == 0) {
1693 new_level = level == 0 ? 0 : level - 1;
1694 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1695 new_level >= 0 && new_level <= 7) {
1696 /* new_level set */
1697 } else
1698 return -EINVAL;
1699
1700 brightness_set(new_level);
1701 }
1702
1703 return 0;
1704 }
1705
1706 static int brightness_update_status(struct backlight_device *bd)
1707 {
1708 return brightness_set(bd->props->brightness);
1709 }
1710
1711 static int volume_offset = 0x30;
1712
1713 static int volume_read(char *p)
1714 {
1715 int len = 0;
1716 u8 level;
1717
1718 if (!acpi_ec_read(volume_offset, &level)) {
1719 len += sprintf(p + len, "level:\t\tunreadable\n");
1720 } else {
1721 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1722 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1723 len += sprintf(p + len, "commands:\tup, down, mute\n");
1724 len += sprintf(p + len, "commands:\tlevel <level>"
1725 " (<level> is 0-15)\n");
1726 }
1727
1728 return len;
1729 }
1730
1731 #define VOLUME_DOWN 0
1732 #define VOLUME_UP 1
1733 #define VOLUME_MUTE 2
1734
1735 static int volume_write(char *buf)
1736 {
1737 int cmos_cmd, inc, i;
1738 u8 level, mute;
1739 int new_level, new_mute;
1740 char *cmd;
1741
1742 while ((cmd = next_cmd(&buf))) {
1743 if (!acpi_ec_read(volume_offset, &level))
1744 return -EIO;
1745 new_mute = mute = level & 0x40;
1746 new_level = level = level & 0xf;
1747
1748 if (strlencmp(cmd, "up") == 0) {
1749 if (mute)
1750 new_mute = 0;
1751 else
1752 new_level = level == 15 ? 15 : level + 1;
1753 } else if (strlencmp(cmd, "down") == 0) {
1754 if (mute)
1755 new_mute = 0;
1756 else
1757 new_level = level == 0 ? 0 : level - 1;
1758 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1759 new_level >= 0 && new_level <= 15) {
1760 /* new_level set */
1761 } else if (strlencmp(cmd, "mute") == 0) {
1762 new_mute = 0x40;
1763 } else
1764 return -EINVAL;
1765
1766 if (new_level != level) { /* mute doesn't change */
1767 cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1768 inc = new_level > level ? 1 : -1;
1769
1770 if (mute && (!cmos_eval(cmos_cmd) ||
1771 !acpi_ec_write(volume_offset, level)))
1772 return -EIO;
1773
1774 for (i = level; i != new_level; i += inc)
1775 if (!cmos_eval(cmos_cmd) ||
1776 !acpi_ec_write(volume_offset, i + inc))
1777 return -EIO;
1778
1779 if (mute && (!cmos_eval(VOLUME_MUTE) ||
1780 !acpi_ec_write(volume_offset,
1781 new_level + mute)))
1782 return -EIO;
1783 }
1784
1785 if (new_mute != mute) { /* level doesn't change */
1786 cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1787
1788 if (!cmos_eval(cmos_cmd) ||
1789 !acpi_ec_write(volume_offset, level + new_mute))
1790 return -EIO;
1791 }
1792 }
1793
1794 return 0;
1795 }
1796
1797 static enum fan_status_access_mode fan_status_access_mode;
1798 static enum fan_control_access_mode fan_control_access_mode;
1799 static enum fan_control_commands fan_control_commands;
1800
1801 static int fan_control_status_known;
1802 static u8 fan_control_initial_status;
1803
1804 static void fan_watchdog_fire(void *ignored);
1805 static int fan_watchdog_maxinterval;
1806 static DECLARE_WORK(fan_watchdog_task, fan_watchdog_fire, NULL);
1807
1808 static int fan_init(void)
1809 {
1810 fan_status_access_mode = IBMACPI_FAN_NONE;
1811 fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1812 fan_control_commands = 0;
1813 fan_control_status_known = 1;
1814 fan_watchdog_maxinterval = 0;
1815
1816 if (gfan_handle) {
1817 /* 570, 600e/x, 770e, 770x */
1818 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1819 } else {
1820 /* all other ThinkPads: note that even old-style
1821 * ThinkPad ECs supports the fan control register */
1822 if (likely(acpi_ec_read(fan_status_offset,
1823 &fan_control_initial_status))) {
1824 fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1825
1826 /* In some ThinkPads, neither the EC nor the ACPI
1827 * DSDT initialize the fan status, and it ends up
1828 * being set to 0x07 when it *could* be either
1829 * 0x07 or 0x80.
1830 *
1831 * Enable for TP-1Y (T43), TP-78 (R51e),
1832 * TP-76 (R52), TP-70 (T43, R52), which are known
1833 * to be buggy. */
1834 if (fan_control_initial_status == 0x07 &&
1835 ibm_thinkpad_ec_found &&
1836 ((ibm_thinkpad_ec_found[0] == '1' &&
1837 ibm_thinkpad_ec_found[1] == 'Y') ||
1838 (ibm_thinkpad_ec_found[0] == '7' &&
1839 (ibm_thinkpad_ec_found[1] == '6' ||
1840 ibm_thinkpad_ec_found[1] == '8' ||
1841 ibm_thinkpad_ec_found[1] == '0'))
1842 )) {
1843 printk(IBM_NOTICE
1844 "fan_init: initial fan status is "
1845 "unknown, assuming it is in auto "
1846 "mode\n");
1847 fan_control_status_known = 0;
1848 }
1849 } else {
1850 printk(IBM_ERR
1851 "ThinkPad ACPI EC access misbehaving, "
1852 "fan status and control unavailable\n");
1853 return 0;
1854 }
1855 }
1856
1857 if (sfan_handle) {
1858 /* 570, 770x-JL */
1859 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
1860 fan_control_commands |=
1861 IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
1862 } else {
1863 if (!gfan_handle) {
1864 /* gfan without sfan means no fan control */
1865 /* all other models implement TP EC 0x2f control */
1866
1867 if (fans_handle) {
1868 /* X31, X40, X41 */
1869 fan_control_access_mode =
1870 IBMACPI_FAN_WR_ACPI_FANS;
1871 fan_control_commands |=
1872 IBMACPI_FAN_CMD_SPEED |
1873 IBMACPI_FAN_CMD_LEVEL |
1874 IBMACPI_FAN_CMD_ENABLE;
1875 } else {
1876 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
1877 fan_control_commands |=
1878 IBMACPI_FAN_CMD_LEVEL |
1879 IBMACPI_FAN_CMD_ENABLE;
1880 }
1881 }
1882 }
1883
1884 return 0;
1885 }
1886
1887 static int fan_get_status(u8 *status)
1888 {
1889 u8 s;
1890
1891 /* TODO:
1892 * Add IBMACPI_FAN_RD_ACPI_FANS ? */
1893
1894 switch (fan_status_access_mode) {
1895 case IBMACPI_FAN_RD_ACPI_GFAN:
1896 /* 570, 600e/x, 770e, 770x */
1897
1898 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1899 return -EIO;
1900
1901 if (likely(status))
1902 *status = s & 0x07;
1903
1904 break;
1905
1906 case IBMACPI_FAN_RD_TPEC:
1907 /* all except 570, 600e/x, 770e, 770x */
1908 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
1909 return -EIO;
1910
1911 if (likely(status))
1912 *status = s;
1913
1914 break;
1915
1916 default:
1917 return -ENXIO;
1918 }
1919
1920 return 0;
1921 }
1922
1923 static int fan_get_speed(unsigned int *speed)
1924 {
1925 u8 hi, lo;
1926
1927 switch (fan_status_access_mode) {
1928 case IBMACPI_FAN_RD_TPEC:
1929 /* all except 570, 600e/x, 770e, 770x */
1930 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
1931 !acpi_ec_read(fan_rpm_offset + 1, &hi)))
1932 return -EIO;
1933
1934 if (likely(speed))
1935 *speed = (hi << 8) | lo;
1936
1937 break;
1938
1939 default:
1940 return -ENXIO;
1941 }
1942
1943 return 0;
1944 }
1945
1946 static void fan_exit(void)
1947 {
1948 cancel_delayed_work(&fan_watchdog_task);
1949 flush_scheduled_work();
1950 }
1951
1952 static void fan_watchdog_reset(void)
1953 {
1954 static int fan_watchdog_active = 0;
1955
1956 if (fan_watchdog_active)
1957 cancel_delayed_work(&fan_watchdog_task);
1958
1959 if (fan_watchdog_maxinterval > 0) {
1960 fan_watchdog_active = 1;
1961 if (!schedule_delayed_work(&fan_watchdog_task,
1962 msecs_to_jiffies(fan_watchdog_maxinterval
1963 * 1000))) {
1964 printk(IBM_ERR "failed to schedule the fan watchdog, "
1965 "watchdog will not trigger\n");
1966 }
1967 } else
1968 fan_watchdog_active = 0;
1969 }
1970
1971 static int fan_read(char *p)
1972 {
1973 int len = 0;
1974 int rc;
1975 u8 status;
1976 unsigned int speed = 0;
1977
1978 switch (fan_status_access_mode) {
1979 case IBMACPI_FAN_RD_ACPI_GFAN:
1980 /* 570, 600e/x, 770e, 770x */
1981 if ((rc = fan_get_status(&status)) < 0)
1982 return rc;
1983
1984 len += sprintf(p + len, "status:\t\t%s\n"
1985 "level:\t\t%d\n",
1986 (status != 0) ? "enabled" : "disabled", status);
1987 break;
1988
1989 case IBMACPI_FAN_RD_TPEC:
1990 /* all except 570, 600e/x, 770e, 770x */
1991 if ((rc = fan_get_status(&status)) < 0)
1992 return rc;
1993
1994 if (unlikely(!fan_control_status_known)) {
1995 if (status != fan_control_initial_status)
1996 fan_control_status_known = 1;
1997 else
1998 /* Return most likely status. In fact, it
1999 * might be the only possible status */
2000 status = IBMACPI_FAN_EC_AUTO;
2001 }
2002
2003 len += sprintf(p + len, "status:\t\t%s\n",
2004 (status != 0) ? "enabled" : "disabled");
2005
2006 /* No ThinkPad boots on disengaged mode, we can safely
2007 * assume the tachometer is online if fan control status
2008 * was unknown */
2009 if ((rc = fan_get_speed(&speed)) < 0)
2010 return rc;
2011
2012 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2013
2014 if (status & IBMACPI_FAN_EC_DISENGAGED)
2015 /* Disengaged mode takes precedence */
2016 len += sprintf(p + len, "level:\t\tdisengaged\n");
2017 else if (status & IBMACPI_FAN_EC_AUTO)
2018 len += sprintf(p + len, "level:\t\tauto\n");
2019 else
2020 len += sprintf(p + len, "level:\t\t%d\n", status);
2021 break;
2022
2023 case IBMACPI_FAN_NONE:
2024 default:
2025 len += sprintf(p + len, "status:\t\tnot supported\n");
2026 }
2027
2028 if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
2029 len += sprintf(p + len, "commands:\tlevel <level>");
2030
2031 switch (fan_control_access_mode) {
2032 case IBMACPI_FAN_WR_ACPI_SFAN:
2033 len += sprintf(p + len, " (<level> is 0-7)\n");
2034 break;
2035
2036 default:
2037 len += sprintf(p + len, " (<level> is 0-7, "
2038 "auto, disengaged)\n");
2039 break;
2040 }
2041 }
2042
2043 if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
2044 len += sprintf(p + len, "commands:\tenable, disable\n"
2045 "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2046 "1-120 (seconds))\n");
2047
2048 if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
2049 len += sprintf(p + len, "commands:\tspeed <speed>"
2050 " (<speed> is 0-65535)\n");
2051
2052 return len;
2053 }
2054
2055 static int fan_set_level(int level)
2056 {
2057 switch (fan_control_access_mode) {
2058 case IBMACPI_FAN_WR_ACPI_SFAN:
2059 if (level >= 0 && level <= 7) {
2060 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2061 return -EIO;
2062 } else
2063 return -EINVAL;
2064 break;
2065
2066 case IBMACPI_FAN_WR_ACPI_FANS:
2067 case IBMACPI_FAN_WR_TPEC:
2068 if ((level != IBMACPI_FAN_EC_AUTO) &&
2069 (level != IBMACPI_FAN_EC_DISENGAGED) &&
2070 ((level < 0) || (level > 7)))
2071 return -EINVAL;
2072
2073 if (!acpi_ec_write(fan_status_offset, level))
2074 return -EIO;
2075 else
2076 fan_control_status_known = 1;
2077 break;
2078
2079 default:
2080 return -ENXIO;
2081 }
2082 return 0;
2083 }
2084
2085 static int fan_set_enable(void)
2086 {
2087 u8 s;
2088 int rc;
2089
2090 switch (fan_control_access_mode) {
2091 case IBMACPI_FAN_WR_ACPI_FANS:
2092 case IBMACPI_FAN_WR_TPEC:
2093 if ((rc = fan_get_status(&s)) < 0)
2094 return rc;
2095
2096 /* Don't go out of emergency fan mode */
2097 if (s != 7)
2098 s = IBMACPI_FAN_EC_AUTO;
2099
2100 if (!acpi_ec_write(fan_status_offset, s))
2101 return -EIO;
2102 else
2103 fan_control_status_known = 1;
2104 break;
2105
2106 case IBMACPI_FAN_WR_ACPI_SFAN:
2107 if ((rc = fan_get_status(&s)) < 0)
2108 return rc;
2109
2110 s &= 0x07;
2111
2112 /* Set fan to at least level 4 */
2113 if (s < 4)
2114 s = 4;
2115
2116 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2117 return -EIO;
2118 break;
2119
2120 default:
2121 return -ENXIO;
2122 }
2123 return 0;
2124 }
2125
2126 static int fan_set_disable(void)
2127 {
2128 switch (fan_control_access_mode) {
2129 case IBMACPI_FAN_WR_ACPI_FANS:
2130 case IBMACPI_FAN_WR_TPEC:
2131 if (!acpi_ec_write(fan_status_offset, 0x00))
2132 return -EIO;
2133 else
2134 fan_control_status_known = 1;
2135 break;
2136
2137 case IBMACPI_FAN_WR_ACPI_SFAN:
2138 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2139 return -EIO;
2140 break;
2141
2142 default:
2143 return -ENXIO;
2144 }
2145 return 0;
2146 }
2147
2148 static int fan_set_speed(int speed)
2149 {
2150 switch (fan_control_access_mode) {
2151 case IBMACPI_FAN_WR_ACPI_FANS:
2152 if (speed >= 0 && speed <= 65535) {
2153 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2154 speed, speed, speed))
2155 return -EIO;
2156 } else
2157 return -EINVAL;
2158 break;
2159
2160 default:
2161 return -ENXIO;
2162 }
2163 return 0;
2164 }
2165
2166 static int fan_write_cmd_level(const char *cmd, int *rc)
2167 {
2168 int level;
2169
2170 if (strlencmp(cmd, "level auto") == 0)
2171 level = IBMACPI_FAN_EC_AUTO;
2172 else if (strlencmp(cmd, "level disengaged") == 0)
2173 level = IBMACPI_FAN_EC_DISENGAGED;
2174 else if (sscanf(cmd, "level %d", &level) != 1)
2175 return 0;
2176
2177 if ((*rc = fan_set_level(level)) == -ENXIO)
2178 printk(IBM_ERR "level command accepted for unsupported "
2179 "access mode %d", fan_control_access_mode);
2180
2181 return 1;
2182 }
2183
2184 static int fan_write_cmd_enable(const char *cmd, int *rc)
2185 {
2186 if (strlencmp(cmd, "enable") != 0)
2187 return 0;
2188
2189 if ((*rc = fan_set_enable()) == -ENXIO)
2190 printk(IBM_ERR "enable command accepted for unsupported "
2191 "access mode %d", fan_control_access_mode);
2192
2193 return 1;
2194 }
2195
2196 static int fan_write_cmd_disable(const char *cmd, int *rc)
2197 {
2198 if (strlencmp(cmd, "disable") != 0)
2199 return 0;
2200
2201 if ((*rc = fan_set_disable()) == -ENXIO)
2202 printk(IBM_ERR "disable command accepted for unsupported "
2203 "access mode %d", fan_control_access_mode);
2204
2205 return 1;
2206 }
2207
2208 static int fan_write_cmd_speed(const char *cmd, int *rc)
2209 {
2210 int speed;
2211
2212 /* TODO:
2213 * Support speed <low> <medium> <high> ? */
2214
2215 if (sscanf(cmd, "speed %d", &speed) != 1)
2216 return 0;
2217
2218 if ((*rc = fan_set_speed(speed)) == -ENXIO)
2219 printk(IBM_ERR "speed command accepted for unsupported "
2220 "access mode %d", fan_control_access_mode);
2221
2222 return 1;
2223 }
2224
2225 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2226 {
2227 int interval;
2228
2229 if (sscanf(cmd, "watchdog %d", &interval) != 1)
2230 return 0;
2231
2232 if (interval < 0 || interval > 120)
2233 *rc = -EINVAL;
2234 else
2235 fan_watchdog_maxinterval = interval;
2236
2237 return 1;
2238 }
2239
2240 static int fan_write(char *buf)
2241 {
2242 char *cmd;
2243 int rc = 0;
2244
2245 while (!rc && (cmd = next_cmd(&buf))) {
2246 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2247 fan_write_cmd_level(cmd, &rc)) &&
2248 !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2249 (fan_write_cmd_enable(cmd, &rc) ||
2250 fan_write_cmd_disable(cmd, &rc) ||
2251 fan_write_cmd_watchdog(cmd, &rc))) &&
2252 !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2253 fan_write_cmd_speed(cmd, &rc))
2254 )
2255 rc = -EINVAL;
2256 else if (!rc)
2257 fan_watchdog_reset();
2258 }
2259
2260 return rc;
2261 }
2262
2263 static void fan_watchdog_fire(void *ignored)
2264 {
2265 printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2266 if (fan_set_enable()) {
2267 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2268 /* reschedule for later */
2269 fan_watchdog_reset();
2270 }
2271 }
2272
2273 static struct ibm_struct ibms[] = {
2274 {
2275 .name = "driver",
2276 .init = driver_init,
2277 .read = driver_read,
2278 },
2279 {
2280 .name = "hotkey",
2281 .hid = IBM_HKEY_HID,
2282 .init = hotkey_init,
2283 .read = hotkey_read,
2284 .write = hotkey_write,
2285 .exit = hotkey_exit,
2286 .notify = hotkey_notify,
2287 .handle = &hkey_handle,
2288 .type = ACPI_DEVICE_NOTIFY,
2289 },
2290 {
2291 .name = "bluetooth",
2292 .init = bluetooth_init,
2293 .read = bluetooth_read,
2294 .write = bluetooth_write,
2295 },
2296 {
2297 .name = "wan",
2298 .init = wan_init,
2299 .read = wan_read,
2300 .write = wan_write,
2301 .experimental = 1,
2302 },
2303 {
2304 .name = "video",
2305 .init = video_init,
2306 .read = video_read,
2307 .write = video_write,
2308 .exit = video_exit,
2309 },
2310 {
2311 .name = "light",
2312 .init = light_init,
2313 .read = light_read,
2314 .write = light_write,
2315 },
2316 #ifdef CONFIG_ACPI_IBM_DOCK
2317 {
2318 .name = "dock",
2319 .read = dock_read,
2320 .write = dock_write,
2321 .notify = dock_notify,
2322 .handle = &dock_handle,
2323 .type = ACPI_SYSTEM_NOTIFY,
2324 },
2325 {
2326 .name = "dock",
2327 .hid = IBM_PCI_HID,
2328 .notify = dock_notify,
2329 .handle = &pci_handle,
2330 .type = ACPI_SYSTEM_NOTIFY,
2331 },
2332 #endif
2333 {
2334 .name = "bay",
2335 .init = bay_init,
2336 .read = bay_read,
2337 .write = bay_write,
2338 .notify = bay_notify,
2339 .handle = &bay_handle,
2340 .type = ACPI_SYSTEM_NOTIFY,
2341 },
2342 {
2343 .name = "cmos",
2344 .read = cmos_read,
2345 .write = cmos_write,
2346 },
2347 {
2348 .name = "led",
2349 .init = led_init,
2350 .read = led_read,
2351 .write = led_write,
2352 },
2353 {
2354 .name = "beep",
2355 .read = beep_read,
2356 .write = beep_write,
2357 },
2358 {
2359 .name = "thermal",
2360 .init = thermal_init,
2361 .read = thermal_read,
2362 },
2363 {
2364 .name = "ecdump",
2365 .read = ecdump_read,
2366 .write = ecdump_write,
2367 .experimental = 1,
2368 },
2369 {
2370 .name = "brightness",
2371 .read = brightness_read,
2372 .write = brightness_write,
2373 },
2374 {
2375 .name = "volume",
2376 .read = volume_read,
2377 .write = volume_write,
2378 },
2379 {
2380 .name = "fan",
2381 .read = fan_read,
2382 .write = fan_write,
2383 .init = fan_init,
2384 .exit = fan_exit,
2385 .experimental = 1,
2386 },
2387 };
2388
2389 static int dispatch_read(char *page, char **start, off_t off, int count,
2390 int *eof, void *data)
2391 {
2392 struct ibm_struct *ibm = (struct ibm_struct *)data;
2393 int len;
2394
2395 if (!ibm || !ibm->read)
2396 return -EINVAL;
2397
2398 len = ibm->read(page);
2399 if (len < 0)
2400 return len;
2401
2402 if (len <= off + count)
2403 *eof = 1;
2404 *start = page + off;
2405 len -= off;
2406 if (len > count)
2407 len = count;
2408 if (len < 0)
2409 len = 0;
2410
2411 return len;
2412 }
2413
2414 static int dispatch_write(struct file *file, const char __user * userbuf,
2415 unsigned long count, void *data)
2416 {
2417 struct ibm_struct *ibm = (struct ibm_struct *)data;
2418 char *kernbuf;
2419 int ret;
2420
2421 if (!ibm || !ibm->write)
2422 return -EINVAL;
2423
2424 kernbuf = kmalloc(count + 2, GFP_KERNEL);
2425 if (!kernbuf)
2426 return -ENOMEM;
2427
2428 if (copy_from_user(kernbuf, userbuf, count)) {
2429 kfree(kernbuf);
2430 return -EFAULT;
2431 }
2432
2433 kernbuf[count] = 0;
2434 strcat(kernbuf, ",");
2435 ret = ibm->write(kernbuf);
2436 if (ret == 0)
2437 ret = count;
2438
2439 kfree(kernbuf);
2440
2441 return ret;
2442 }
2443
2444 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
2445 {
2446 struct ibm_struct *ibm = (struct ibm_struct *)data;
2447
2448 if (!ibm || !ibm->notify)
2449 return;
2450
2451 ibm->notify(ibm, event);
2452 }
2453
2454 static int __init setup_notify(struct ibm_struct *ibm)
2455 {
2456 acpi_status status;
2457 int ret;
2458
2459 if (!*ibm->handle)
2460 return 0;
2461
2462 ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
2463 if (ret < 0) {
2464 printk(IBM_ERR "%s device not present\n", ibm->name);
2465 return 0;
2466 }
2467
2468 acpi_driver_data(ibm->device) = ibm;
2469 sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
2470
2471 status = acpi_install_notify_handler(*ibm->handle, ibm->type,
2472 dispatch_notify, ibm);
2473 if (ACPI_FAILURE(status)) {
2474 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
2475 ibm->name, status);
2476 return -ENODEV;
2477 }
2478
2479 return 0;
2480 }
2481
2482 static int __init ibm_device_add(struct acpi_device *device)
2483 {
2484 return 0;
2485 }
2486
2487 static int __init register_driver(struct ibm_struct *ibm)
2488 {
2489 int ret;
2490
2491 ibm->driver = kmalloc(sizeof(struct acpi_driver), GFP_KERNEL);
2492 if (!ibm->driver) {
2493 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
2494 return -1;
2495 }
2496
2497 memset(ibm->driver, 0, sizeof(struct acpi_driver));
2498 sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
2499 ibm->driver->ids = ibm->hid;
2500 ibm->driver->ops.add = &ibm_device_add;
2501
2502 ret = acpi_bus_register_driver(ibm->driver);
2503 if (ret < 0) {
2504 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
2505 ibm->hid, ret);
2506 kfree(ibm->driver);
2507 }
2508
2509 return ret;
2510 }
2511
2512 static int __init ibm_init(struct ibm_struct *ibm)
2513 {
2514 int ret;
2515 struct proc_dir_entry *entry;
2516
2517 if (ibm->experimental && !experimental)
2518 return 0;
2519
2520 if (ibm->hid) {
2521 ret = register_driver(ibm);
2522 if (ret < 0)
2523 return ret;
2524 ibm->driver_registered = 1;
2525 }
2526
2527 if (ibm->init) {
2528 ret = ibm->init();
2529 if (ret != 0)
2530 return ret;
2531 ibm->init_called = 1;
2532 }
2533
2534 if (ibm->read) {
2535 entry = create_proc_entry(ibm->name,
2536 S_IFREG | S_IRUGO | S_IWUSR,
2537 proc_dir);
2538 if (!entry) {
2539 printk(IBM_ERR "unable to create proc entry %s\n",
2540 ibm->name);
2541 return -ENODEV;
2542 }
2543 entry->owner = THIS_MODULE;
2544 entry->data = ibm;
2545 entry->read_proc = &dispatch_read;
2546 if (ibm->write)
2547 entry->write_proc = &dispatch_write;
2548 ibm->proc_created = 1;
2549 }
2550
2551 if (ibm->notify) {
2552 ret = setup_notify(ibm);
2553 if (ret < 0)
2554 return ret;
2555 ibm->notify_installed = 1;
2556 }
2557
2558 return 0;
2559 }
2560
2561 static void ibm_exit(struct ibm_struct *ibm)
2562 {
2563 if (ibm->notify_installed)
2564 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2565 dispatch_notify);
2566
2567 if (ibm->proc_created)
2568 remove_proc_entry(ibm->name, proc_dir);
2569
2570 if (ibm->init_called && ibm->exit)
2571 ibm->exit();
2572
2573 if (ibm->driver_registered) {
2574 acpi_bus_unregister_driver(ibm->driver);
2575 kfree(ibm->driver);
2576 }
2577 }
2578
2579 static void __init ibm_handle_init(char *name,
2580 acpi_handle * handle, acpi_handle parent,
2581 char **paths, int num_paths, char **path)
2582 {
2583 int i;
2584 acpi_status status;
2585
2586 for (i = 0; i < num_paths; i++) {
2587 status = acpi_get_handle(parent, paths[i], handle);
2588 if (ACPI_SUCCESS(status)) {
2589 *path = paths[i];
2590 return;
2591 }
2592 }
2593
2594 *handle = NULL;
2595 }
2596
2597 #define IBM_HANDLE_INIT(object) \
2598 ibm_handle_init(#object, &object##_handle, *object##_parent, \
2599 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
2600
2601 static int set_ibm_param(const char *val, struct kernel_param *kp)
2602 {
2603 unsigned int i;
2604
2605 for (i = 0; i < ARRAY_SIZE(ibms); i++)
2606 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2607 if (strlen(val) > sizeof(ibms[i].param) - 2)
2608 return -ENOSPC;
2609 strcpy(ibms[i].param, val);
2610 strcat(ibms[i].param, ",");
2611 return 0;
2612 }
2613
2614 return -EINVAL;
2615 }
2616
2617 #define IBM_PARAM(feature) \
2618 module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2619
2620 IBM_PARAM(hotkey);
2621 IBM_PARAM(bluetooth);
2622 IBM_PARAM(video);
2623 IBM_PARAM(light);
2624 #ifdef CONFIG_ACPI_IBM_DOCK
2625 IBM_PARAM(dock);
2626 #endif
2627 IBM_PARAM(bay);
2628 IBM_PARAM(cmos);
2629 IBM_PARAM(led);
2630 IBM_PARAM(beep);
2631 IBM_PARAM(ecdump);
2632 IBM_PARAM(brightness);
2633 IBM_PARAM(volume);
2634 IBM_PARAM(fan);
2635
2636 static struct backlight_properties ibm_backlight_data = {
2637 .owner = THIS_MODULE,
2638 .get_brightness = brightness_get,
2639 .update_status = brightness_update_status,
2640 .max_brightness = 7,
2641 };
2642
2643 static void acpi_ibm_exit(void)
2644 {
2645 int i;
2646
2647 if (ibm_backlight_device)
2648 backlight_device_unregister(ibm_backlight_device);
2649
2650 for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2651 ibm_exit(&ibms[i]);
2652
2653 remove_proc_entry(IBM_DIR, acpi_root_dir);
2654
2655 if (ibm_thinkpad_ec_found)
2656 kfree(ibm_thinkpad_ec_found);
2657 }
2658
2659 static char* __init check_dmi_for_ec(void)
2660 {
2661 struct dmi_device *dev = NULL;
2662 char ec_fw_string[18];
2663
2664 /*
2665 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2666 * X32 or newer, all Z series; Some models must have an
2667 * up-to-date BIOS or they will not be detected.
2668 *
2669 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2670 */
2671 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2672 if (sscanf(dev->name,
2673 "IBM ThinkPad Embedded Controller -[%17c",
2674 ec_fw_string) == 1) {
2675 ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2676 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2677 return kstrdup(ec_fw_string, GFP_KERNEL);
2678 }
2679 }
2680 return NULL;
2681 }
2682
2683 static int __init acpi_ibm_init(void)
2684 {
2685 int ret, i;
2686
2687 if (acpi_disabled)
2688 return -ENODEV;
2689
2690 if (!acpi_specific_hotkey_enabled) {
2691 printk(IBM_ERR "using generic hotkey driver\n");
2692 return -ENODEV;
2693 }
2694
2695 /* ec is required because many other handles are relative to it */
2696 IBM_HANDLE_INIT(ec);
2697 if (!ec_handle) {
2698 printk(IBM_ERR "ec object not found\n");
2699 return -ENODEV;
2700 }
2701
2702 /* Models with newer firmware report the EC in DMI */
2703 ibm_thinkpad_ec_found = check_dmi_for_ec();
2704 if (ibm_thinkpad_ec_found)
2705 printk(IBM_INFO "ThinkPad EC firmware %s\n",
2706 ibm_thinkpad_ec_found);
2707
2708 /* these handles are not required */
2709 IBM_HANDLE_INIT(vid);
2710 IBM_HANDLE_INIT(vid2);
2711 IBM_HANDLE_INIT(ledb);
2712 IBM_HANDLE_INIT(led);
2713 IBM_HANDLE_INIT(hkey);
2714 IBM_HANDLE_INIT(lght);
2715 IBM_HANDLE_INIT(cmos);
2716 #ifdef CONFIG_ACPI_IBM_DOCK
2717 IBM_HANDLE_INIT(dock);
2718 #endif
2719 IBM_HANDLE_INIT(pci);
2720 IBM_HANDLE_INIT(bay);
2721 if (bay_handle)
2722 IBM_HANDLE_INIT(bay_ej);
2723 IBM_HANDLE_INIT(bay2);
2724 if (bay2_handle)
2725 IBM_HANDLE_INIT(bay2_ej);
2726 IBM_HANDLE_INIT(beep);
2727 IBM_HANDLE_INIT(ecrd);
2728 IBM_HANDLE_INIT(ecwr);
2729 IBM_HANDLE_INIT(fans);
2730 IBM_HANDLE_INIT(gfan);
2731 IBM_HANDLE_INIT(sfan);
2732
2733 proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2734 if (!proc_dir) {
2735 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2736 return -ENODEV;
2737 }
2738 proc_dir->owner = THIS_MODULE;
2739
2740 for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2741 ret = ibm_init(&ibms[i]);
2742 if (ret >= 0 && *ibms[i].param)
2743 ret = ibms[i].write(ibms[i].param);
2744 if (ret < 0) {
2745 acpi_ibm_exit();
2746 return ret;
2747 }
2748 }
2749
2750 ibm_backlight_device = backlight_device_register("ibm", NULL,
2751 &ibm_backlight_data);
2752 if (IS_ERR(ibm_backlight_device)) {
2753 printk(IBM_ERR "Could not register ibm backlight device\n");
2754 ibm_backlight_device = NULL;
2755 acpi_ibm_exit();
2756 }
2757
2758 return 0;
2759 }
2760
2761 module_init(acpi_ibm_init);
2762 module_exit(acpi_ibm_exit);
CJK support for tty framebuffer vt