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USB: open disconnect race in iowarrior
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / asus_acpi.c
blobd915fec9bf63e8c1f085dff9ea18f36f1b7ce20d
1 /*
2 * asus_acpi.c - Asus Laptop ACPI Extras
3 *
4 *
5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
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 * The development page for this driver is located at
23 * http://sourceforge.net/projects/acpi4asus/
24 *
25 * Credits:
26 * Pontus Fuchs - Helper functions, cleanup
27 * Johann Wiesner - Small compile fixes
28 * John Belmonte - ACPI code for Toshiba laptop was a good starting point.
29 * �ic Burghard - LED display support for W1N
30 *
31 */
32
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/types.h>
37 #include <linux/proc_fs.h>
38 #include <linux/backlight.h>
39 #include <acpi/acpi_drivers.h>
40 #include <acpi/acpi_bus.h>
41 #include <asm/uaccess.h>
42
43 #define ASUS_ACPI_VERSION "0.30"
44
45 #define PROC_ASUS "asus" //the directory
46 #define PROC_MLED "mled"
47 #define PROC_WLED "wled"
48 #define PROC_TLED "tled"
49 #define PROC_BT "bluetooth"
50 #define PROC_LEDD "ledd"
51 #define PROC_INFO "info"
52 #define PROC_LCD "lcd"
53 #define PROC_BRN "brn"
54 #define PROC_DISP "disp"
55
56 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
57 #define ACPI_HOTK_CLASS "hotkey"
58 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
59
60 /*
61 * Some events we use, same for all Asus
62 */
63 #define BR_UP 0x10
64 #define BR_DOWN 0x20
65
66 /*
67 * Flags for hotk status
68 */
69 #define MLED_ON 0x01 //mail LED
70 #define WLED_ON 0x02 //wireless LED
71 #define TLED_ON 0x04 //touchpad LED
72 #define BT_ON 0x08 //internal Bluetooth
73
74 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
75 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
76 MODULE_LICENSE("GPL");
77
78 static uid_t asus_uid;
79 static gid_t asus_gid;
80 module_param(asus_uid, uint, 0);
81 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus.\n");
82 module_param(asus_gid, uint, 0);
83 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus.\n");
84
85 /* For each model, all features implemented,
86 * those marked with R are relative to HOTK, A for absolute */
87 struct model_data {
88 char *name; //name of the laptop________________A
89 char *mt_mled; //method to handle mled_____________R
90 char *mled_status; //node to handle mled reading_______A
91 char *mt_wled; //method to handle wled_____________R
92 char *wled_status; //node to handle wled reading_______A
93 char *mt_tled; //method to handle tled_____________R
94 char *tled_status; //node to handle tled reading_______A
95 char *mt_ledd; //method to handle LED display______R
96 char *mt_bt_switch; //method to switch Bluetooth on/off_R
97 char *bt_status; //no model currently supports this__?
98 char *mt_lcd_switch; //method to turn LCD on/off_________A
99 char *lcd_status; //node to read LCD panel state______A
100 char *brightness_up; //method to set brightness up_______A
101 char *brightness_down; //guess what ?______________________A
102 char *brightness_set; //method to set absolute brightness_R
103 char *brightness_get; //method to get absolute brightness_R
104 char *brightness_status; //node to get brightness____________A
105 char *display_set; //method to set video output________R
106 char *display_get; //method to get video output________R
107 };
108
109 /*
110 * This is the main structure, we can use it to store anything interesting
111 * about the hotk device
112 */
113 struct asus_hotk {
114 struct acpi_device *device; //the device we are in
115 acpi_handle handle; //the handle of the hotk device
116 char status; //status of the hotk, for LEDs, ...
117 u32 ledd_status; //status of the LED display
118 struct model_data *methods; //methods available on the laptop
119 u8 brightness; //brightness level
120 enum {
121 A1x = 0, //A1340D, A1300F
122 A2x, //A2500H
123 A4G, //A4700G
124 D1x, //D1
125 L2D, //L2000D
126 L3C, //L3800C
127 L3D, //L3400D
128 L3H, //L3H, L2000E, L5D
129 L4R, //L4500R
130 L5x, //L5800C
131 L8L, //L8400L
132 M1A, //M1300A
133 M2E, //M2400E, L4400L
134 M6N, //M6800N, W3400N
135 M6R, //M6700R, A3000G
136 P30, //Samsung P30
137 S1x, //S1300A, but also L1400B and M2400A (L84F)
138 S2x, //S200 (J1 reported), Victor MP-XP7210
139 W1N, //W1000N
140 W5A, //W5A
141 W3V, //W3030V
142 xxN, //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
143 A4S, //Z81sp
144 //(Centrino)
145 END_MODEL
146 } model; //Models currently supported
147 u16 event_count[128]; //count for each event TODO make this better
148 };
149
150 /* Here we go */
151 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
152 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
153 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
154 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
155 #define S1x_PREFIX "\\_SB.PCI0.PX40."
156 #define S2x_PREFIX A1x_PREFIX
157 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
158
159 static struct model_data model_conf[END_MODEL] = {
160 /*
161 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
162 * it seems to be a kind of switch, but what for ?
163 */
164
165 {
166 .name = "A1x",
167 .mt_mled = "MLED",
168 .mled_status = "\\MAIL",
169 .mt_lcd_switch = A1x_PREFIX "_Q10",
170 .lcd_status = "\\BKLI",
171 .brightness_up = A1x_PREFIX "_Q0E",
172 .brightness_down = A1x_PREFIX "_Q0F"},
173
174 {
175 .name = "A2x",
176 .mt_mled = "MLED",
177 .mt_wled = "WLED",
178 .wled_status = "\\SG66",
179 .mt_lcd_switch = "\\Q10",
180 .lcd_status = "\\BAOF",
181 .brightness_set = "SPLV",
182 .brightness_get = "GPLV",
183 .display_set = "SDSP",
184 .display_get = "\\INFB"},
185
186 {
187 .name = "A4G",
188 .mt_mled = "MLED",
189 /* WLED present, but not controlled by ACPI */
190 .mt_lcd_switch = xxN_PREFIX "_Q10",
191 .brightness_set = "SPLV",
192 .brightness_get = "GPLV",
193 .display_set = "SDSP",
194 .display_get = "\\ADVG"},
195
196 {
197 .name = "D1x",
198 .mt_mled = "MLED",
199 .mt_lcd_switch = "\\Q0D",
200 .lcd_status = "\\GP11",
201 .brightness_up = "\\Q0C",
202 .brightness_down = "\\Q0B",
203 .brightness_status = "\\BLVL",
204 .display_set = "SDSP",
205 .display_get = "\\INFB"},
206
207 {
208 .name = "L2D",
209 .mt_mled = "MLED",
210 .mled_status = "\\SGP6",
211 .mt_wled = "WLED",
212 .wled_status = "\\RCP3",
213 .mt_lcd_switch = "\\Q10",
214 .lcd_status = "\\SGP0",
215 .brightness_up = "\\Q0E",
216 .brightness_down = "\\Q0F",
217 .display_set = "SDSP",
218 .display_get = "\\INFB"},
219
220 {
221 .name = "L3C",
222 .mt_mled = "MLED",
223 .mt_wled = "WLED",
224 .mt_lcd_switch = L3C_PREFIX "_Q10",
225 .lcd_status = "\\GL32",
226 .brightness_set = "SPLV",
227 .brightness_get = "GPLV",
228 .display_set = "SDSP",
229 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
230
231 {
232 .name = "L3D",
233 .mt_mled = "MLED",
234 .mled_status = "\\MALD",
235 .mt_wled = "WLED",
236 .mt_lcd_switch = "\\Q10",
237 .lcd_status = "\\BKLG",
238 .brightness_set = "SPLV",
239 .brightness_get = "GPLV",
240 .display_set = "SDSP",
241 .display_get = "\\INFB"},
242
243 {
244 .name = "L3H",
245 .mt_mled = "MLED",
246 .mt_wled = "WLED",
247 .mt_lcd_switch = "EHK",
248 .lcd_status = "\\_SB.PCI0.PM.PBC",
249 .brightness_set = "SPLV",
250 .brightness_get = "GPLV",
251 .display_set = "SDSP",
252 .display_get = "\\INFB"},
253
254 {
255 .name = "L4R",
256 .mt_mled = "MLED",
257 .mt_wled = "WLED",
258 .wled_status = "\\_SB.PCI0.SBRG.SG13",
259 .mt_lcd_switch = xxN_PREFIX "_Q10",
260 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
261 .brightness_set = "SPLV",
262 .brightness_get = "GPLV",
263 .display_set = "SDSP",
264 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
265
266 {
267 .name = "L5x",
268 .mt_mled = "MLED",
269 /* WLED present, but not controlled by ACPI */
270 .mt_tled = "TLED",
271 .mt_lcd_switch = "\\Q0D",
272 .lcd_status = "\\BAOF",
273 .brightness_set = "SPLV",
274 .brightness_get = "GPLV",
275 .display_set = "SDSP",
276 .display_get = "\\INFB"},
277
278 {
279 .name = "L8L"
280 /* No features, but at least support the hotkeys */
281 },
282
283 {
284 .name = "M1A",
285 .mt_mled = "MLED",
286 .mt_lcd_switch = M1A_PREFIX "Q10",
287 .lcd_status = "\\PNOF",
288 .brightness_up = M1A_PREFIX "Q0E",
289 .brightness_down = M1A_PREFIX "Q0F",
290 .brightness_status = "\\BRIT",
291 .display_set = "SDSP",
292 .display_get = "\\INFB"},
293
294 {
295 .name = "M2E",
296 .mt_mled = "MLED",
297 .mt_wled = "WLED",
298 .mt_lcd_switch = "\\Q10",
299 .lcd_status = "\\GP06",
300 .brightness_set = "SPLV",
301 .brightness_get = "GPLV",
302 .display_set = "SDSP",
303 .display_get = "\\INFB"},
304
305 {
306 .name = "M6N",
307 .mt_mled = "MLED",
308 .mt_wled = "WLED",
309 .wled_status = "\\_SB.PCI0.SBRG.SG13",
310 .mt_lcd_switch = xxN_PREFIX "_Q10",
311 .lcd_status = "\\_SB.BKLT",
312 .brightness_set = "SPLV",
313 .brightness_get = "GPLV",
314 .display_set = "SDSP",
315 .display_get = "\\SSTE"},
316
317 {
318 .name = "M6R",
319 .mt_mled = "MLED",
320 .mt_wled = "WLED",
321 .mt_lcd_switch = xxN_PREFIX "_Q10",
322 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
323 .brightness_set = "SPLV",
324 .brightness_get = "GPLV",
325 .display_set = "SDSP",
326 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
327
328 {
329 .name = "P30",
330 .mt_wled = "WLED",
331 .mt_lcd_switch = P30_PREFIX "_Q0E",
332 .lcd_status = "\\BKLT",
333 .brightness_up = P30_PREFIX "_Q68",
334 .brightness_down = P30_PREFIX "_Q69",
335 .brightness_get = "GPLV",
336 .display_set = "SDSP",
337 .display_get = "\\DNXT"},
338
339 {
340 .name = "S1x",
341 .mt_mled = "MLED",
342 .mled_status = "\\EMLE",
343 .mt_wled = "WLED",
344 .mt_lcd_switch = S1x_PREFIX "Q10",
345 .lcd_status = "\\PNOF",
346 .brightness_set = "SPLV",
347 .brightness_get = "GPLV"},
348
349 {
350 .name = "S2x",
351 .mt_mled = "MLED",
352 .mled_status = "\\MAIL",
353 .mt_lcd_switch = S2x_PREFIX "_Q10",
354 .lcd_status = "\\BKLI",
355 .brightness_up = S2x_PREFIX "_Q0B",
356 .brightness_down = S2x_PREFIX "_Q0A"},
357
358 {
359 .name = "W1N",
360 .mt_mled = "MLED",
361 .mt_wled = "WLED",
362 .mt_ledd = "SLCM",
363 .mt_lcd_switch = xxN_PREFIX "_Q10",
364 .lcd_status = "\\BKLT",
365 .brightness_set = "SPLV",
366 .brightness_get = "GPLV",
367 .display_set = "SDSP",
368 .display_get = "\\ADVG"},
369
370 {
371 .name = "W5A",
372 .mt_bt_switch = "BLED",
373 .mt_wled = "WLED",
374 .mt_lcd_switch = xxN_PREFIX "_Q10",
375 .brightness_set = "SPLV",
376 .brightness_get = "GPLV",
377 .display_set = "SDSP",
378 .display_get = "\\ADVG"},
379
380 {
381 .name = "W3V",
382 .mt_mled = "MLED",
383 .mt_wled = "WLED",
384 .mt_lcd_switch = xxN_PREFIX "_Q10",
385 .lcd_status = "\\BKLT",
386 .brightness_set = "SPLV",
387 .brightness_get = "GPLV",
388 .display_set = "SDSP",
389 .display_get = "\\INFB"},
390
391 {
392 .name = "xxN",
393 .mt_mled = "MLED",
394 /* WLED present, but not controlled by ACPI */
395 .mt_lcd_switch = xxN_PREFIX "_Q10",
396 .lcd_status = "\\BKLT",
397 .brightness_set = "SPLV",
398 .brightness_get = "GPLV",
399 .display_set = "SDSP",
400 .display_get = "\\ADVG"},
401
402 {
403 .name = "A4S",
404 .brightness_set = "SPLV",
405 .brightness_get = "GPLV",
406 .mt_bt_switch = "BLED",
407 .mt_wled = "WLED"
408 }
409
410 };
411
412 /* procdir we use */
413 static struct proc_dir_entry *asus_proc_dir;
414
415 static struct backlight_device *asus_backlight_device;
416
417 /*
418 * This header is made available to allow proper configuration given model,
419 * revision number , ... this info cannot go in struct asus_hotk because it is
420 * available before the hotk
421 */
422 static struct acpi_table_header *asus_info;
423
424 /* The actual device the driver binds to */
425 static struct asus_hotk *hotk;
426
427 /*
428 * The hotkey driver and autoloading declaration
429 */
430 static int asus_hotk_add(struct acpi_device *device);
431 static int asus_hotk_remove(struct acpi_device *device, int type);
432 static const struct acpi_device_id asus_device_ids[] = {
433 {"ATK0100", 0},
434 {"", 0},
435 };
436 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
437
438 static struct acpi_driver asus_hotk_driver = {
439 .name = "asus_acpi",
440 .class = ACPI_HOTK_CLASS,
441 .ids = asus_device_ids,
442 .ops = {
443 .add = asus_hotk_add,
444 .remove = asus_hotk_remove,
445 },
446 };
447
448 /*
449 * This function evaluates an ACPI method, given an int as parameter, the
450 * method is searched within the scope of the handle, can be NULL. The output
451 * of the method is written is output, which can also be NULL
452 *
453 * returns 1 if write is successful, 0 else.
454 */
455 static int write_acpi_int(acpi_handle handle, const char *method, int val,
456 struct acpi_buffer *output)
457 {
458 struct acpi_object_list params; //list of input parameters (an int here)
459 union acpi_object in_obj; //the only param we use
460 acpi_status status;
461
462 params.count = 1;
463 params.pointer = &in_obj;
464 in_obj.type = ACPI_TYPE_INTEGER;
465 in_obj.integer.value = val;
466
467 status = acpi_evaluate_object(handle, (char *)method, &params, output);
468 return (status == AE_OK);
469 }
470
471 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
472 {
473 struct acpi_buffer output;
474 union acpi_object out_obj;
475 acpi_status status;
476
477 output.length = sizeof(out_obj);
478 output.pointer = &out_obj;
479
480 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
481 *val = out_obj.integer.value;
482 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
483 }
484
485 /*
486 * We write our info in page, we begin at offset off and cannot write more
487 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
488 * number of bytes written in page
489 */
490 static int
491 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
492 void *data)
493 {
494 int len = 0;
495 int temp;
496 char buf[16]; //enough for all info
497 /*
498 * We use the easy way, we don't care of off and count, so we don't set eof
499 * to 1
500 */
501
502 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
503 len += sprintf(page + len, "Model reference : %s\n",
504 hotk->methods->name);
505 /*
506 * The SFUN method probably allows the original driver to get the list
507 * of features supported by a given model. For now, 0x0100 or 0x0800
508 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
509 * The significance of others is yet to be found.
510 */
511 if (read_acpi_int(hotk->handle, "SFUN", &temp))
512 len +=
513 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
514 /*
515 * Another value for userspace: the ASYM method returns 0x02 for
516 * battery low and 0x04 for battery critical, its readings tend to be
517 * more accurate than those provided by _BST.
518 * Note: since not all the laptops provide this method, errors are
519 * silently ignored.
520 */
521 if (read_acpi_int(hotk->handle, "ASYM", &temp))
522 len +=
523 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
524 if (asus_info) {
525 snprintf(buf, 16, "%d", asus_info->length);
526 len += sprintf(page + len, "DSDT length : %s\n", buf);
527 snprintf(buf, 16, "%d", asus_info->checksum);
528 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
529 snprintf(buf, 16, "%d", asus_info->revision);
530 len += sprintf(page + len, "DSDT revision : %s\n", buf);
531 snprintf(buf, 7, "%s", asus_info->oem_id);
532 len += sprintf(page + len, "OEM id : %s\n", buf);
533 snprintf(buf, 9, "%s", asus_info->oem_table_id);
534 len += sprintf(page + len, "OEM table id : %s\n", buf);
535 snprintf(buf, 16, "%x", asus_info->oem_revision);
536 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
537 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
538 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
539 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
540 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
541 }
542
543 return len;
544 }
545
546 /*
547 * /proc handlers
548 * We write our info in page, we begin at offset off and cannot write more
549 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
550 * number of bytes written in page
551 */
552
553 /* Generic LED functions */
554 static int read_led(const char *ledname, int ledmask)
555 {
556 if (ledname) {
557 int led_status;
558
559 if (read_acpi_int(NULL, ledname, &led_status))
560 return led_status;
561 else
562 printk(KERN_WARNING "Asus ACPI: Error reading LED "
563 "status\n");
564 }
565 return (hotk->status & ledmask) ? 1 : 0;
566 }
567
568 static int parse_arg(const char __user * buf, unsigned long count, int *val)
569 {
570 char s[32];
571 if (!count)
572 return 0;
573 if (count > 31)
574 return -EINVAL;
575 if (copy_from_user(s, buf, count))
576 return -EFAULT;
577 s[count] = 0;
578 if (sscanf(s, "%i", val) != 1)
579 return -EINVAL;
580 return count;
581 }
582
583 /* FIXME: kill extraneous args so it can be called independently */
584 static int
585 write_led(const char __user * buffer, unsigned long count,
586 char *ledname, int ledmask, int invert)
587 {
588 int rv, value;
589 int led_out = 0;
590
591 rv = parse_arg(buffer, count, &value);
592 if (rv > 0)
593 led_out = value ? 1 : 0;
594
595 hotk->status =
596 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
597
598 if (invert) /* invert target value */
599 led_out = !led_out & 0x1;
600
601 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
602 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
603 ledname);
604
605 return rv;
606 }
607
608 /*
609 * Proc handlers for MLED
610 */
611 static int
612 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
613 void *data)
614 {
615 return sprintf(page, "%d\n",
616 read_led(hotk->methods->mled_status, MLED_ON));
617 }
618
619 static int
620 proc_write_mled(struct file *file, const char __user * buffer,
621 unsigned long count, void *data)
622 {
623 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
624 }
625
626 /*
627 * Proc handlers for LED display
628 */
629 static int
630 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
631 void *data)
632 {
633 return sprintf(page, "0x%08x\n", hotk->ledd_status);
634 }
635
636 static int
637 proc_write_ledd(struct file *file, const char __user * buffer,
638 unsigned long count, void *data)
639 {
640 int rv, value;
641
642 rv = parse_arg(buffer, count, &value);
643 if (rv > 0) {
644 if (!write_acpi_int
645 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
646 printk(KERN_WARNING
647 "Asus ACPI: LED display write failed\n");
648 else
649 hotk->ledd_status = (u32) value;
650 }
651 return rv;
652 }
653
654 /*
655 * Proc handlers for WLED
656 */
657 static int
658 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
659 void *data)
660 {
661 return sprintf(page, "%d\n",
662 read_led(hotk->methods->wled_status, WLED_ON));
663 }
664
665 static int
666 proc_write_wled(struct file *file, const char __user * buffer,
667 unsigned long count, void *data)
668 {
669 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
670 }
671
672 /*
673 * Proc handlers for Bluetooth
674 */
675 static int
676 proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
677 void *data)
678 {
679 return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
680 }
681
682 static int
683 proc_write_bluetooth(struct file *file, const char __user * buffer,
684 unsigned long count, void *data)
685 {
686 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
687 presence and its LED */
688 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
689 }
690
691 /*
692 * Proc handlers for TLED
693 */
694 static int
695 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
696 void *data)
697 {
698 return sprintf(page, "%d\n",
699 read_led(hotk->methods->tled_status, TLED_ON));
700 }
701
702 static int
703 proc_write_tled(struct file *file, const char __user * buffer,
704 unsigned long count, void *data)
705 {
706 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
707 }
708
709 static int get_lcd_state(void)
710 {
711 int lcd = 0;
712
713 if (hotk->model != L3H) {
714 /* We don't have to check anything if we are here */
715 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
716 printk(KERN_WARNING
717 "Asus ACPI: Error reading LCD status\n");
718
719 if (hotk->model == L2D)
720 lcd = ~lcd;
721 } else { /* L3H and the like have to be handled differently */
722 acpi_status status = 0;
723 struct acpi_object_list input;
724 union acpi_object mt_params[2];
725 struct acpi_buffer output;
726 union acpi_object out_obj;
727
728 input.count = 2;
729 input.pointer = mt_params;
730 /* Note: the following values are partly guessed up, but
731 otherwise they seem to work */
732 mt_params[0].type = ACPI_TYPE_INTEGER;
733 mt_params[0].integer.value = 0x02;
734 mt_params[1].type = ACPI_TYPE_INTEGER;
735 mt_params[1].integer.value = 0x02;
736
737 output.length = sizeof(out_obj);
738 output.pointer = &out_obj;
739
740 status =
741 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
742 &input, &output);
743 if (status != AE_OK)
744 return -1;
745 if (out_obj.type == ACPI_TYPE_INTEGER)
746 /* That's what the AML code does */
747 lcd = out_obj.integer.value >> 8;
748 }
749
750 return (lcd & 1);
751 }
752
753 static int set_lcd_state(int value)
754 {
755 int lcd = 0;
756 acpi_status status = 0;
757
758 lcd = value ? 1 : 0;
759 if (lcd != get_lcd_state()) {
760 /* switch */
761 if (hotk->model != L3H) {
762 status =
763 acpi_evaluate_object(NULL,
764 hotk->methods->mt_lcd_switch,
765 NULL, NULL);
766 } else { /* L3H and the like have to be handled differently */
767 if (!write_acpi_int
768 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
769 NULL))
770 status = AE_ERROR;
771 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
772 the exact behaviour is simulated here */
773 }
774 if (ACPI_FAILURE(status))
775 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
776 }
777 return 0;
778
779 }
780
781 static int
782 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
783 void *data)
784 {
785 return sprintf(page, "%d\n", get_lcd_state());
786 }
787
788 static int
789 proc_write_lcd(struct file *file, const char __user * buffer,
790 unsigned long count, void *data)
791 {
792 int rv, value;
793
794 rv = parse_arg(buffer, count, &value);
795 if (rv > 0)
796 set_lcd_state(value);
797 return rv;
798 }
799
800 static int read_brightness(struct backlight_device *bd)
801 {
802 int value;
803
804 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
805 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
806 &value))
807 printk(KERN_WARNING
808 "Asus ACPI: Error reading brightness\n");
809 } else if (hotk->methods->brightness_status) { /* For D1 for example */
810 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
811 &value))
812 printk(KERN_WARNING
813 "Asus ACPI: Error reading brightness\n");
814 } else /* No GPLV method */
815 value = hotk->brightness;
816 return value;
817 }
818
819 /*
820 * Change the brightness level
821 */
822 static int set_brightness(int value)
823 {
824 acpi_status status = 0;
825 int ret = 0;
826
827 /* SPLV laptop */
828 if (hotk->methods->brightness_set) {
829 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
830 value, NULL))
831 printk(KERN_WARNING
832 "Asus ACPI: Error changing brightness\n");
833 ret = -EIO;
834 goto out;
835 }
836
837 /* No SPLV method if we are here, act as appropriate */
838 value -= read_brightness(NULL);
839 while (value != 0) {
840 status = acpi_evaluate_object(NULL, (value > 0) ?
841 hotk->methods->brightness_up :
842 hotk->methods->brightness_down,
843 NULL, NULL);
844 (value > 0) ? value-- : value++;
845 if (ACPI_FAILURE(status))
846 printk(KERN_WARNING
847 "Asus ACPI: Error changing brightness\n");
848 ret = -EIO;
849 }
850 out:
851 return ret;
852 }
853
854 static int set_brightness_status(struct backlight_device *bd)
855 {
856 return set_brightness(bd->props.brightness);
857 }
858
859 static int
860 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
861 void *data)
862 {
863 return sprintf(page, "%d\n", read_brightness(NULL));
864 }
865
866 static int
867 proc_write_brn(struct file *file, const char __user * buffer,
868 unsigned long count, void *data)
869 {
870 int rv, value;
871
872 rv = parse_arg(buffer, count, &value);
873 if (rv > 0) {
874 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
875 /* 0 <= value <= 15 */
876 set_brightness(value);
877 }
878 return rv;
879 }
880
881 static void set_display(int value)
882 {
883 /* no sanity check needed for now */
884 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
885 value, NULL))
886 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
887 return;
888 }
889
890 /*
891 * Now, *this* one could be more user-friendly, but so far, no-one has
892 * complained. The significance of bits is the same as in proc_write_disp()
893 */
894 static int
895 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
896 void *data)
897 {
898 int value = 0;
899
900 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
901 printk(KERN_WARNING
902 "Asus ACPI: Error reading display status\n");
903 value &= 0x07; /* needed for some models, shouldn't hurt others */
904 return sprintf(page, "%d\n", value);
905 }
906
907 /*
908 * Experimental support for display switching. As of now: 1 should activate
909 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
910 * (bitwise) of these will suffice. I never actually tested 3 displays hooked up
911 * simultaneously, so be warned. See the acpi4asus README for more info.
912 */
913 static int
914 proc_write_disp(struct file *file, const char __user * buffer,
915 unsigned long count, void *data)
916 {
917 int rv, value;
918
919 rv = parse_arg(buffer, count, &value);
920 if (rv > 0)
921 set_display(value);
922 return rv;
923 }
924
925 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
926 int *eof, void *data);
927 typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
928 unsigned long count, void *data);
929
930 static int
931 asus_proc_add(char *name, proc_writefunc * writefunc,
932 proc_readfunc * readfunc, mode_t mode,
933 struct acpi_device *device)
934 {
935 struct proc_dir_entry *proc =
936 create_proc_entry(name, mode, acpi_device_dir(device));
937 if (!proc) {
938 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
939 return -1;
940 }
941 proc->write_proc = writefunc;
942 proc->read_proc = readfunc;
943 proc->data = acpi_driver_data(device);
944 proc->owner = THIS_MODULE;
945 proc->uid = asus_uid;
946 proc->gid = asus_gid;
947 return 0;
948 }
949
950 static int asus_hotk_add_fs(struct acpi_device *device)
951 {
952 struct proc_dir_entry *proc;
953 mode_t mode;
954
955 /*
956 * If parameter uid or gid is not changed, keep the default setting for
957 * our proc entries (-rw-rw-rw-) else, it means we care about security,
958 * and then set to -rw-rw----
959 */
960
961 if ((asus_uid == 0) && (asus_gid == 0)) {
962 mode = S_IFREG | S_IRUGO | S_IWUGO;
963 } else {
964 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
965 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
966 "deprecated, use chown and chmod instead!\n");
967 }
968
969 acpi_device_dir(device) = asus_proc_dir;
970 if (!acpi_device_dir(device))
971 return -ENODEV;
972
973 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
974 if (proc) {
975 proc->read_proc = proc_read_info;
976 proc->data = acpi_driver_data(device);
977 proc->owner = THIS_MODULE;
978 proc->uid = asus_uid;
979 proc->gid = asus_gid;
980 } else {
981 printk(KERN_WARNING " Unable to create " PROC_INFO
982 " fs entry\n");
983 }
984
985 if (hotk->methods->mt_wled) {
986 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
987 mode, device);
988 }
989
990 if (hotk->methods->mt_ledd) {
991 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
992 mode, device);
993 }
994
995 if (hotk->methods->mt_mled) {
996 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
997 mode, device);
998 }
999
1000 if (hotk->methods->mt_tled) {
1001 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
1002 mode, device);
1003 }
1004
1005 if (hotk->methods->mt_bt_switch) {
1006 asus_proc_add(PROC_BT, &proc_write_bluetooth,
1007 &proc_read_bluetooth, mode, device);
1008 }
1009
1010 /*
1011 * We need both read node and write method as LCD switch is also accessible
1012 * from keyboard
1013 */
1014 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
1015 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
1016 device);
1017 }
1018
1019 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
1020 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
1021 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
1022 device);
1023 }
1024
1025 if (hotk->methods->display_set) {
1026 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
1027 mode, device);
1028 }
1029
1030 return 0;
1031 }
1032
1033 static int asus_hotk_remove_fs(struct acpi_device *device)
1034 {
1035 if (acpi_device_dir(device)) {
1036 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1037 if (hotk->methods->mt_wled)
1038 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1039 if (hotk->methods->mt_mled)
1040 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1041 if (hotk->methods->mt_tled)
1042 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1043 if (hotk->methods->mt_ledd)
1044 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1045 if (hotk->methods->mt_bt_switch)
1046 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1047 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1048 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1049 if ((hotk->methods->brightness_up
1050 && hotk->methods->brightness_down)
1051 || (hotk->methods->brightness_get
1052 && hotk->methods->brightness_set))
1053 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1054 if (hotk->methods->display_set)
1055 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1056 }
1057 return 0;
1058 }
1059
1060 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
1061 {
1062 /* TODO Find a better way to handle events count. */
1063 if (!hotk)
1064 return;
1065
1066 if ((event & ~((u32) BR_UP)) < 16) {
1067 hotk->brightness = (event & ~((u32) BR_UP));
1068 } else if ((event & ~((u32) BR_DOWN)) < 16) {
1069 hotk->brightness = (event & ~((u32) BR_DOWN));
1070 }
1071
1072 acpi_bus_generate_proc_event(hotk->device, event,
1073 hotk->event_count[event % 128]++);
1074
1075 return;
1076 }
1077
1078 /*
1079 * Match the model string to the list of supported models. Return END_MODEL if
1080 * no match or model is NULL.
1081 */
1082 static int asus_model_match(char *model)
1083 {
1084 if (model == NULL)
1085 return END_MODEL;
1086
1087 if (strncmp(model, "L3D", 3) == 0)
1088 return L3D;
1089 else if (strncmp(model, "L2E", 3) == 0 ||
1090 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1091 return L3H;
1092 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1093 return L3C;
1094 else if (strncmp(model, "L8L", 3) == 0)
1095 return L8L;
1096 else if (strncmp(model, "L4R", 3) == 0)
1097 return L4R;
1098 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1099 return M6N;
1100 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1101 return M6R;
1102 else if (strncmp(model, "M2N", 3) == 0 ||
1103 strncmp(model, "M3N", 3) == 0 ||
1104 strncmp(model, "M5N", 3) == 0 ||
1105 strncmp(model, "M6N", 3) == 0 ||
1106 strncmp(model, "S1N", 3) == 0 ||
1107 strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0)
1108 return xxN;
1109 else if (strncmp(model, "M1", 2) == 0)
1110 return M1A;
1111 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1112 return M2E;
1113 else if (strncmp(model, "L2", 2) == 0)
1114 return L2D;
1115 else if (strncmp(model, "L8", 2) == 0)
1116 return S1x;
1117 else if (strncmp(model, "D1", 2) == 0)
1118 return D1x;
1119 else if (strncmp(model, "A1", 2) == 0)
1120 return A1x;
1121 else if (strncmp(model, "A2", 2) == 0)
1122 return A2x;
1123 else if (strncmp(model, "J1", 2) == 0)
1124 return S2x;
1125 else if (strncmp(model, "L5", 2) == 0)
1126 return L5x;
1127 else if (strncmp(model, "A4G", 3) == 0)
1128 return A4G;
1129 else if (strncmp(model, "W1N", 3) == 0)
1130 return W1N;
1131 else if (strncmp(model, "W3V", 3) == 0)
1132 return W3V;
1133 else if (strncmp(model, "W5A", 3) == 0)
1134 return W5A;
1135 else if (strncmp(model, "A4S", 3) == 0)
1136 return A4S;
1137 else
1138 return END_MODEL;
1139 }
1140
1141 /*
1142 * This function is used to initialize the hotk with right values. In this
1143 * method, we can make all the detection we want, and modify the hotk struct
1144 */
1145 static int asus_hotk_get_info(void)
1146 {
1147 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1148 union acpi_object *model = NULL;
1149 int bsts_result;
1150 char *string = NULL;
1151 acpi_status status;
1152
1153 /*
1154 * Get DSDT headers early enough to allow for differentiating between
1155 * models, but late enough to allow acpi_bus_register_driver() to fail
1156 * before doing anything ACPI-specific. Should we encounter a machine,
1157 * which needs special handling (i.e. its hotkey device has a different
1158 * HID), this bit will be moved. A global variable asus_info contains
1159 * the DSDT header.
1160 */
1161 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
1162 if (ACPI_FAILURE(status))
1163 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1164
1165 /* We have to write 0 on init this far for all ASUS models */
1166 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1167 printk(KERN_ERR " Hotkey initialization failed\n");
1168 return -ENODEV;
1169 }
1170
1171 /* This needs to be called for some laptops to init properly */
1172 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1173 printk(KERN_WARNING " Error calling BSTS\n");
1174 else if (bsts_result)
1175 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1176 bsts_result);
1177
1178 /*
1179 * Try to match the object returned by INIT to the specific model.
1180 * Handle every possible object (or the lack of thereof) the DSDT
1181 * writers might throw at us. When in trouble, we pass NULL to
1182 * asus_model_match() and try something completely different.
1183 */
1184 if (buffer.pointer) {
1185 model = buffer.pointer;
1186 switch (model->type) {
1187 case ACPI_TYPE_STRING:
1188 string = model->string.pointer;
1189 break;
1190 case ACPI_TYPE_BUFFER:
1191 string = model->buffer.pointer;
1192 break;
1193 default:
1194 kfree(model);
1195 model = NULL;
1196 break;
1197 }
1198 }
1199 hotk->model = asus_model_match(string);
1200 if (hotk->model == END_MODEL) { /* match failed */
1201 if (asus_info &&
1202 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1203 hotk->model = P30;
1204 printk(KERN_NOTICE
1205 " Samsung P30 detected, supported\n");
1206 } else {
1207 hotk->model = M2E;
1208 printk(KERN_NOTICE " unsupported model %s, trying "
1209 "default values\n", string);
1210 printk(KERN_NOTICE
1211 " send /proc/acpi/dsdt to the developers\n");
1212 }
1213 hotk->methods = &model_conf[hotk->model];
1214 return AE_OK;
1215 }
1216 hotk->methods = &model_conf[hotk->model];
1217 printk(KERN_NOTICE " %s model detected, supported\n", string);
1218
1219 /* Sort of per-model blacklist */
1220 if (strncmp(string, "L2B", 3) == 0)
1221 hotk->methods->lcd_status = NULL;
1222 /* L2B is similar enough to L3C to use its settings, with this only
1223 exception */
1224 else if (strncmp(string, "A3G", 3) == 0)
1225 hotk->methods->lcd_status = "\\BLFG";
1226 /* A3G is like M6R */
1227 else if (strncmp(string, "S5N", 3) == 0 ||
1228 strncmp(string, "M5N", 3) == 0 ||
1229 strncmp(string, "W3N", 3) == 0)
1230 hotk->methods->mt_mled = NULL;
1231 /* S5N, M5N and W3N have no MLED */
1232 else if (strncmp(string, "L5D", 3) == 0)
1233 hotk->methods->mt_wled = NULL;
1234 /* L5D's WLED is not controlled by ACPI */
1235 else if (strncmp(string, "M2N", 3) == 0 ||
1236 strncmp(string, "W3V", 3) == 0 ||
1237 strncmp(string, "S1N", 3) == 0)
1238 hotk->methods->mt_wled = "WLED";
1239 /* M2N, S1N and W3V have a usable WLED */
1240 else if (asus_info) {
1241 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1242 hotk->methods->mled_status = NULL;
1243 /* S1300A reports L84F, but L1400B too, account for that */
1244 }
1245
1246 kfree(model);
1247
1248 return AE_OK;
1249 }
1250
1251 static int asus_hotk_check(void)
1252 {
1253 int result = 0;
1254
1255 result = acpi_bus_get_status(hotk->device);
1256 if (result)
1257 return result;
1258
1259 if (hotk->device->status.present) {
1260 result = asus_hotk_get_info();
1261 } else {
1262 printk(KERN_ERR " Hotkey device not present, aborting\n");
1263 return -EINVAL;
1264 }
1265
1266 return result;
1267 }
1268
1269 static int asus_hotk_found;
1270
1271 static int asus_hotk_add(struct acpi_device *device)
1272 {
1273 acpi_status status = AE_OK;
1274 int result;
1275
1276 if (!device)
1277 return -EINVAL;
1278
1279 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1280 ASUS_ACPI_VERSION);
1281
1282 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1283 if (!hotk)
1284 return -ENOMEM;
1285
1286 hotk->handle = device->handle;
1287 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1288 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1289 acpi_driver_data(device) = hotk;
1290 hotk->device = device;
1291
1292 result = asus_hotk_check();
1293 if (result)
1294 goto end;
1295
1296 result = asus_hotk_add_fs(device);
1297 if (result)
1298 goto end;
1299
1300 /*
1301 * We install the handler, it will receive the hotk in parameter, so, we
1302 * could add other data to the hotk struct
1303 */
1304 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1305 asus_hotk_notify, hotk);
1306 if (ACPI_FAILURE(status))
1307 printk(KERN_ERR " Error installing notify handler\n");
1308
1309 /* For laptops without GPLV: init the hotk->brightness value */
1310 if ((!hotk->methods->brightness_get)
1311 && (!hotk->methods->brightness_status)
1312 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1313 status =
1314 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1315 NULL, NULL);
1316 if (ACPI_FAILURE(status))
1317 printk(KERN_WARNING " Error changing brightness\n");
1318 else {
1319 status =
1320 acpi_evaluate_object(NULL,
1321 hotk->methods->brightness_up,
1322 NULL, NULL);
1323 if (ACPI_FAILURE(status))
1324 printk(KERN_WARNING " Strange, error changing"
1325 " brightness\n");
1326 }
1327 }
1328
1329 asus_hotk_found = 1;
1330
1331 /* LED display is off by default */
1332 hotk->ledd_status = 0xFFF;
1333
1334 end:
1335 if (result) {
1336 kfree(hotk);
1337 }
1338
1339 return result;
1340 }
1341
1342 static int asus_hotk_remove(struct acpi_device *device, int type)
1343 {
1344 acpi_status status = 0;
1345
1346 if (!device || !acpi_driver_data(device))
1347 return -EINVAL;
1348
1349 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1350 asus_hotk_notify);
1351 if (ACPI_FAILURE(status))
1352 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1353
1354 asus_hotk_remove_fs(device);
1355
1356 kfree(hotk);
1357
1358 return 0;
1359 }
1360
1361 static struct backlight_ops asus_backlight_data = {
1362 .get_brightness = read_brightness,
1363 .update_status = set_brightness_status,
1364 };
1365
1366 static void asus_acpi_exit(void)
1367 {
1368 if (asus_backlight_device)
1369 backlight_device_unregister(asus_backlight_device);
1370
1371 acpi_bus_unregister_driver(&asus_hotk_driver);
1372 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1373
1374 return;
1375 }
1376
1377 static int __init asus_acpi_init(void)
1378 {
1379 int result;
1380
1381 if (acpi_disabled)
1382 return -ENODEV;
1383
1384 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1385 if (!asus_proc_dir) {
1386 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1387 return -ENODEV;
1388 }
1389 asus_proc_dir->owner = THIS_MODULE;
1390
1391 result = acpi_bus_register_driver(&asus_hotk_driver);
1392 if (result < 0) {
1393 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1394 return result;
1395 }
1396
1397 /*
1398 * This is a bit of a kludge. We only want this module loaded
1399 * for ASUS systems, but there's currently no way to probe the
1400 * ACPI namespace for ASUS HIDs. So we just return failure if
1401 * we didn't find one, which will cause the module to be
1402 * unloaded.
1403 */
1404 if (!asus_hotk_found) {
1405 acpi_bus_unregister_driver(&asus_hotk_driver);
1406 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1407 return -ENODEV;
1408 }
1409
1410 asus_backlight_device = backlight_device_register("asus",NULL,NULL,
1411 &asus_backlight_data);
1412 if (IS_ERR(asus_backlight_device)) {
1413 printk(KERN_ERR "Could not register asus backlight device\n");
1414 asus_backlight_device = NULL;
1415 asus_acpi_exit();
1416 return -ENODEV;
1417 }
1418 asus_backlight_device->props.max_brightness = 15;
1419
1420 return 0;
1421 }
1422
1423 module_init(asus_acpi_init);
1424 module_exit(asus_acpi_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree