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PCI: quirks.c: cleanup
[linux-2.6.22.y-op.git] / drivers / acpi / asus_acpi.c
blob396140bbbe576bc83f945896c32ad7d8dcc6ef38
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 * Éric 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 #define ACPI_HOTK_HID "ATK0100"
60
61 /*
62 * Some events we use, same for all Asus
63 */
64 #define BR_UP 0x10
65 #define BR_DOWN 0x20
66
67 /*
68 * Flags for hotk status
69 */
70 #define MLED_ON 0x01 //mail LED
71 #define WLED_ON 0x02 //wireless LED
72 #define TLED_ON 0x04 //touchpad LED
73 #define BT_ON 0x08 //internal Bluetooth
74
75 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
76 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
77 MODULE_LICENSE("GPL");
78
79 static uid_t asus_uid;
80 static gid_t asus_gid;
81 module_param(asus_uid, uint, 0);
82 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus.\n");
83 module_param(asus_gid, uint, 0);
84 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus.\n");
85
86 /* For each model, all features implemented,
87 * those marked with R are relative to HOTK, A for absolute */
88 struct model_data {
89 char *name; //name of the laptop________________A
90 char *mt_mled; //method to handle mled_____________R
91 char *mled_status; //node to handle mled reading_______A
92 char *mt_wled; //method to handle wled_____________R
93 char *wled_status; //node to handle wled reading_______A
94 char *mt_tled; //method to handle tled_____________R
95 char *tled_status; //node to handle tled reading_______A
96 char *mt_ledd; //method to handle LED display______R
97 char *mt_bt_switch; //method to switch Bluetooth on/off_R
98 char *bt_status; //no model currently supports this__?
99 char *mt_lcd_switch; //method to turn LCD on/off_________A
100 char *lcd_status; //node to read LCD panel state______A
101 char *brightness_up; //method to set brightness up_______A
102 char *brightness_down; //guess what ?______________________A
103 char *brightness_set; //method to set absolute brightness_R
104 char *brightness_get; //method to get absolute brightness_R
105 char *brightness_status; //node to get brightness____________A
106 char *display_set; //method to set video output________R
107 char *display_get; //method to get video output________R
108 };
109
110 /*
111 * This is the main structure, we can use it to store anything interesting
112 * about the hotk device
113 */
114 struct asus_hotk {
115 struct acpi_device *device; //the device we are in
116 acpi_handle handle; //the handle of the hotk device
117 char status; //status of the hotk, for LEDs, ...
118 u32 ledd_status; //status of the LED display
119 struct model_data *methods; //methods available on the laptop
120 u8 brightness; //brightness level
121 enum {
122 A1x = 0, //A1340D, A1300F
123 A2x, //A2500H
124 A4G, //A4700G
125 D1x, //D1
126 L2D, //L2000D
127 L3C, //L3800C
128 L3D, //L3400D
129 L3H, //L3H, L2000E, L5D
130 L4R, //L4500R
131 L5x, //L5800C
132 L8L, //L8400L
133 M1A, //M1300A
134 M2E, //M2400E, L4400L
135 M6N, //M6800N, W3400N
136 M6R, //M6700R, A3000G
137 P30, //Samsung P30
138 S1x, //S1300A, but also L1400B and M2400A (L84F)
139 S2x, //S200 (J1 reported), Victor MP-XP7210
140 W1N, //W1000N
141 W5A, //W5A
142 W3V, //W3030V
143 xxN, //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
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 /* procdir we use */
404 static struct proc_dir_entry *asus_proc_dir;
405
406 static struct backlight_device *asus_backlight_device;
407
408 /*
409 * This header is made available to allow proper configuration given model,
410 * revision number , ... this info cannot go in struct asus_hotk because it is
411 * available before the hotk
412 */
413 static struct acpi_table_header *asus_info;
414
415 /* The actual device the driver binds to */
416 static struct asus_hotk *hotk;
417
418 /*
419 * The hotkey driver declaration
420 */
421 static int asus_hotk_add(struct acpi_device *device);
422 static int asus_hotk_remove(struct acpi_device *device, int type);
423 static struct acpi_driver asus_hotk_driver = {
424 .name = ACPI_HOTK_NAME,
425 .class = ACPI_HOTK_CLASS,
426 .ids = ACPI_HOTK_HID,
427 .ops = {
428 .add = asus_hotk_add,
429 .remove = asus_hotk_remove,
430 },
431 };
432
433 /*
434 * This function evaluates an ACPI method, given an int as parameter, the
435 * method is searched within the scope of the handle, can be NULL. The output
436 * of the method is written is output, which can also be NULL
437 *
438 * returns 1 if write is successful, 0 else.
439 */
440 static int write_acpi_int(acpi_handle handle, const char *method, int val,
441 struct acpi_buffer *output)
442 {
443 struct acpi_object_list params; //list of input parameters (an int here)
444 union acpi_object in_obj; //the only param we use
445 acpi_status status;
446
447 params.count = 1;
448 params.pointer = &in_obj;
449 in_obj.type = ACPI_TYPE_INTEGER;
450 in_obj.integer.value = val;
451
452 status = acpi_evaluate_object(handle, (char *)method, &params, output);
453 return (status == AE_OK);
454 }
455
456 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
457 {
458 struct acpi_buffer output;
459 union acpi_object out_obj;
460 acpi_status status;
461
462 output.length = sizeof(out_obj);
463 output.pointer = &out_obj;
464
465 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
466 *val = out_obj.integer.value;
467 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
468 }
469
470 /*
471 * We write our info in page, we begin at offset off and cannot write more
472 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
473 * number of bytes written in page
474 */
475 static int
476 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
477 void *data)
478 {
479 int len = 0;
480 int temp;
481 char buf[16]; //enough for all info
482 /*
483 * We use the easy way, we don't care of off and count, so we don't set eof
484 * to 1
485 */
486
487 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
488 len += sprintf(page + len, "Model reference : %s\n",
489 hotk->methods->name);
490 /*
491 * The SFUN method probably allows the original driver to get the list
492 * of features supported by a given model. For now, 0x0100 or 0x0800
493 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
494 * The significance of others is yet to be found.
495 */
496 if (read_acpi_int(hotk->handle, "SFUN", &temp))
497 len +=
498 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
499 /*
500 * Another value for userspace: the ASYM method returns 0x02 for
501 * battery low and 0x04 for battery critical, its readings tend to be
502 * more accurate than those provided by _BST.
503 * Note: since not all the laptops provide this method, errors are
504 * silently ignored.
505 */
506 if (read_acpi_int(hotk->handle, "ASYM", &temp))
507 len +=
508 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
509 if (asus_info) {
510 snprintf(buf, 16, "%d", asus_info->length);
511 len += sprintf(page + len, "DSDT length : %s\n", buf);
512 snprintf(buf, 16, "%d", asus_info->checksum);
513 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
514 snprintf(buf, 16, "%d", asus_info->revision);
515 len += sprintf(page + len, "DSDT revision : %s\n", buf);
516 snprintf(buf, 7, "%s", asus_info->oem_id);
517 len += sprintf(page + len, "OEM id : %s\n", buf);
518 snprintf(buf, 9, "%s", asus_info->oem_table_id);
519 len += sprintf(page + len, "OEM table id : %s\n", buf);
520 snprintf(buf, 16, "%x", asus_info->oem_revision);
521 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
522 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
523 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
524 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
525 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
526 }
527
528 return len;
529 }
530
531 /*
532 * /proc handlers
533 * We write our info in page, we begin at offset off and cannot write more
534 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
535 * number of bytes written in page
536 */
537
538 /* Generic LED functions */
539 static int read_led(const char *ledname, int ledmask)
540 {
541 if (ledname) {
542 int led_status;
543
544 if (read_acpi_int(NULL, ledname, &led_status))
545 return led_status;
546 else
547 printk(KERN_WARNING "Asus ACPI: Error reading LED "
548 "status\n");
549 }
550 return (hotk->status & ledmask) ? 1 : 0;
551 }
552
553 static int parse_arg(const char __user * buf, unsigned long count, int *val)
554 {
555 char s[32];
556 if (!count)
557 return 0;
558 if (count > 31)
559 return -EINVAL;
560 if (copy_from_user(s, buf, count))
561 return -EFAULT;
562 s[count] = 0;
563 if (sscanf(s, "%i", val) != 1)
564 return -EINVAL;
565 return count;
566 }
567
568 /* FIXME: kill extraneous args so it can be called independently */
569 static int
570 write_led(const char __user * buffer, unsigned long count,
571 char *ledname, int ledmask, int invert)
572 {
573 int rv, value;
574 int led_out = 0;
575
576 rv = parse_arg(buffer, count, &value);
577 if (rv > 0)
578 led_out = value ? 1 : 0;
579
580 hotk->status =
581 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
582
583 if (invert) /* invert target value */
584 led_out = !led_out & 0x1;
585
586 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
587 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
588 ledname);
589
590 return rv;
591 }
592
593 /*
594 * Proc handlers for MLED
595 */
596 static int
597 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
598 void *data)
599 {
600 return sprintf(page, "%d\n",
601 read_led(hotk->methods->mled_status, MLED_ON));
602 }
603
604 static int
605 proc_write_mled(struct file *file, const char __user * buffer,
606 unsigned long count, void *data)
607 {
608 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
609 }
610
611 /*
612 * Proc handlers for LED display
613 */
614 static int
615 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
616 void *data)
617 {
618 return sprintf(page, "0x%08x\n", hotk->ledd_status);
619 }
620
621 static int
622 proc_write_ledd(struct file *file, const char __user * buffer,
623 unsigned long count, void *data)
624 {
625 int rv, value;
626
627 rv = parse_arg(buffer, count, &value);
628 if (rv > 0) {
629 if (!write_acpi_int
630 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
631 printk(KERN_WARNING
632 "Asus ACPI: LED display write failed\n");
633 else
634 hotk->ledd_status = (u32) value;
635 }
636 return rv;
637 }
638
639 /*
640 * Proc handlers for WLED
641 */
642 static int
643 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
644 void *data)
645 {
646 return sprintf(page, "%d\n",
647 read_led(hotk->methods->wled_status, WLED_ON));
648 }
649
650 static int
651 proc_write_wled(struct file *file, const char __user * buffer,
652 unsigned long count, void *data)
653 {
654 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
655 }
656
657 /*
658 * Proc handlers for Bluetooth
659 */
660 static int
661 proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
662 void *data)
663 {
664 return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
665 }
666
667 static int
668 proc_write_bluetooth(struct file *file, const char __user * buffer,
669 unsigned long count, void *data)
670 {
671 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
672 presence and its LED */
673 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
674 }
675
676 /*
677 * Proc handlers for TLED
678 */
679 static int
680 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
681 void *data)
682 {
683 return sprintf(page, "%d\n",
684 read_led(hotk->methods->tled_status, TLED_ON));
685 }
686
687 static int
688 proc_write_tled(struct file *file, const char __user * buffer,
689 unsigned long count, void *data)
690 {
691 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
692 }
693
694 static int get_lcd_state(void)
695 {
696 int lcd = 0;
697
698 if (hotk->model != L3H) {
699 /* We don't have to check anything if we are here */
700 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
701 printk(KERN_WARNING
702 "Asus ACPI: Error reading LCD status\n");
703
704 if (hotk->model == L2D)
705 lcd = ~lcd;
706 } else { /* L3H and the like have to be handled differently */
707 acpi_status status = 0;
708 struct acpi_object_list input;
709 union acpi_object mt_params[2];
710 struct acpi_buffer output;
711 union acpi_object out_obj;
712
713 input.count = 2;
714 input.pointer = mt_params;
715 /* Note: the following values are partly guessed up, but
716 otherwise they seem to work */
717 mt_params[0].type = ACPI_TYPE_INTEGER;
718 mt_params[0].integer.value = 0x02;
719 mt_params[1].type = ACPI_TYPE_INTEGER;
720 mt_params[1].integer.value = 0x02;
721
722 output.length = sizeof(out_obj);
723 output.pointer = &out_obj;
724
725 status =
726 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
727 &input, &output);
728 if (status != AE_OK)
729 return -1;
730 if (out_obj.type == ACPI_TYPE_INTEGER)
731 /* That's what the AML code does */
732 lcd = out_obj.integer.value >> 8;
733 }
734
735 return (lcd & 1);
736 }
737
738 static int set_lcd_state(int value)
739 {
740 int lcd = 0;
741 acpi_status status = 0;
742
743 lcd = value ? 1 : 0;
744 if (lcd != get_lcd_state()) {
745 /* switch */
746 if (hotk->model != L3H) {
747 status =
748 acpi_evaluate_object(NULL,
749 hotk->methods->mt_lcd_switch,
750 NULL, NULL);
751 } else { /* L3H and the like have to be handled differently */
752 if (!write_acpi_int
753 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
754 NULL))
755 status = AE_ERROR;
756 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
757 the exact behaviour is simulated here */
758 }
759 if (ACPI_FAILURE(status))
760 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
761 }
762 return 0;
763
764 }
765
766 static int
767 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
768 void *data)
769 {
770 return sprintf(page, "%d\n", get_lcd_state());
771 }
772
773 static int
774 proc_write_lcd(struct file *file, const char __user * buffer,
775 unsigned long count, void *data)
776 {
777 int rv, value;
778
779 rv = parse_arg(buffer, count, &value);
780 if (rv > 0)
781 set_lcd_state(value);
782 return rv;
783 }
784
785 static int read_brightness(struct backlight_device *bd)
786 {
787 int value;
788
789 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
790 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
791 &value))
792 printk(KERN_WARNING
793 "Asus ACPI: Error reading brightness\n");
794 } else if (hotk->methods->brightness_status) { /* For D1 for example */
795 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
796 &value))
797 printk(KERN_WARNING
798 "Asus ACPI: Error reading brightness\n");
799 } else /* No GPLV method */
800 value = hotk->brightness;
801 return value;
802 }
803
804 /*
805 * Change the brightness level
806 */
807 static int set_brightness(int value)
808 {
809 acpi_status status = 0;
810 int ret = 0;
811
812 /* SPLV laptop */
813 if (hotk->methods->brightness_set) {
814 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
815 value, NULL))
816 printk(KERN_WARNING
817 "Asus ACPI: Error changing brightness\n");
818 ret = -EIO;
819 goto out;
820 }
821
822 /* No SPLV method if we are here, act as appropriate */
823 value -= read_brightness(NULL);
824 while (value != 0) {
825 status = acpi_evaluate_object(NULL, (value > 0) ?
826 hotk->methods->brightness_up :
827 hotk->methods->brightness_down,
828 NULL, NULL);
829 (value > 0) ? value-- : value++;
830 if (ACPI_FAILURE(status))
831 printk(KERN_WARNING
832 "Asus ACPI: Error changing brightness\n");
833 ret = -EIO;
834 }
835 out:
836 return ret;
837 }
838
839 static int set_brightness_status(struct backlight_device *bd)
840 {
841 return set_brightness(bd->props->brightness);
842 }
843
844 static int
845 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
846 void *data)
847 {
848 return sprintf(page, "%d\n", read_brightness(NULL));
849 }
850
851 static int
852 proc_write_brn(struct file *file, const char __user * buffer,
853 unsigned long count, void *data)
854 {
855 int rv, value;
856
857 rv = parse_arg(buffer, count, &value);
858 if (rv > 0) {
859 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
860 /* 0 <= value <= 15 */
861 set_brightness(value);
862 }
863 return rv;
864 }
865
866 static void set_display(int value)
867 {
868 /* no sanity check needed for now */
869 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
870 value, NULL))
871 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
872 return;
873 }
874
875 /*
876 * Now, *this* one could be more user-friendly, but so far, no-one has
877 * complained. The significance of bits is the same as in proc_write_disp()
878 */
879 static int
880 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
881 void *data)
882 {
883 int value = 0;
884
885 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
886 printk(KERN_WARNING
887 "Asus ACPI: Error reading display status\n");
888 value &= 0x07; /* needed for some models, shouldn't hurt others */
889 return sprintf(page, "%d\n", value);
890 }
891
892 /*
893 * Experimental support for display switching. As of now: 1 should activate
894 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
895 * (bitwise) of these will suffice. I never actually tested 3 displays hooked up
896 * simultaneously, so be warned. See the acpi4asus README for more info.
897 */
898 static int
899 proc_write_disp(struct file *file, const char __user * buffer,
900 unsigned long count, void *data)
901 {
902 int rv, value;
903
904 rv = parse_arg(buffer, count, &value);
905 if (rv > 0)
906 set_display(value);
907 return rv;
908 }
909
910 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
911 int *eof, void *data);
912 typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
913 unsigned long count, void *data);
914
915 static int
916 asus_proc_add(char *name, proc_writefunc * writefunc,
917 proc_readfunc * readfunc, mode_t mode,
918 struct acpi_device *device)
919 {
920 struct proc_dir_entry *proc =
921 create_proc_entry(name, mode, acpi_device_dir(device));
922 if (!proc) {
923 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
924 return -1;
925 }
926 proc->write_proc = writefunc;
927 proc->read_proc = readfunc;
928 proc->data = acpi_driver_data(device);
929 proc->owner = THIS_MODULE;
930 proc->uid = asus_uid;
931 proc->gid = asus_gid;
932 return 0;
933 }
934
935 static int asus_hotk_add_fs(struct acpi_device *device)
936 {
937 struct proc_dir_entry *proc;
938 mode_t mode;
939
940 /*
941 * If parameter uid or gid is not changed, keep the default setting for
942 * our proc entries (-rw-rw-rw-) else, it means we care about security,
943 * and then set to -rw-rw----
944 */
945
946 if ((asus_uid == 0) && (asus_gid == 0)) {
947 mode = S_IFREG | S_IRUGO | S_IWUGO;
948 } else {
949 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
950 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
951 "deprecated, use chown and chmod instead!\n");
952 }
953
954 acpi_device_dir(device) = asus_proc_dir;
955 if (!acpi_device_dir(device))
956 return -ENODEV;
957
958 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
959 if (proc) {
960 proc->read_proc = proc_read_info;
961 proc->data = acpi_driver_data(device);
962 proc->owner = THIS_MODULE;
963 proc->uid = asus_uid;
964 proc->gid = asus_gid;
965 } else {
966 printk(KERN_WARNING " Unable to create " PROC_INFO
967 " fs entry\n");
968 }
969
970 if (hotk->methods->mt_wled) {
971 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
972 mode, device);
973 }
974
975 if (hotk->methods->mt_ledd) {
976 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
977 mode, device);
978 }
979
980 if (hotk->methods->mt_mled) {
981 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
982 mode, device);
983 }
984
985 if (hotk->methods->mt_tled) {
986 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
987 mode, device);
988 }
989
990 if (hotk->methods->mt_bt_switch) {
991 asus_proc_add(PROC_BT, &proc_write_bluetooth,
992 &proc_read_bluetooth, mode, device);
993 }
994
995 /*
996 * We need both read node and write method as LCD switch is also accessible
997 * from keyboard
998 */
999 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
1000 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
1001 device);
1002 }
1003
1004 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
1005 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
1006 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
1007 device);
1008 }
1009
1010 if (hotk->methods->display_set) {
1011 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
1012 mode, device);
1013 }
1014
1015 return 0;
1016 }
1017
1018 static int asus_hotk_remove_fs(struct acpi_device *device)
1019 {
1020 if (acpi_device_dir(device)) {
1021 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1022 if (hotk->methods->mt_wled)
1023 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1024 if (hotk->methods->mt_mled)
1025 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1026 if (hotk->methods->mt_tled)
1027 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1028 if (hotk->methods->mt_ledd)
1029 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1030 if (hotk->methods->mt_bt_switch)
1031 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1032 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1033 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1034 if ((hotk->methods->brightness_up
1035 && hotk->methods->brightness_down)
1036 || (hotk->methods->brightness_get
1037 && hotk->methods->brightness_set))
1038 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1039 if (hotk->methods->display_set)
1040 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1041 }
1042 return 0;
1043 }
1044
1045 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
1046 {
1047 /* TODO Find a better way to handle events count. */
1048 if (!hotk)
1049 return;
1050
1051 if ((event & ~((u32) BR_UP)) < 16) {
1052 hotk->brightness = (event & ~((u32) BR_UP));
1053 } else if ((event & ~((u32) BR_DOWN)) < 16) {
1054 hotk->brightness = (event & ~((u32) BR_DOWN));
1055 }
1056
1057 acpi_bus_generate_event(hotk->device, event,
1058 hotk->event_count[event % 128]++);
1059
1060 return;
1061 }
1062
1063 /*
1064 * Match the model string to the list of supported models. Return END_MODEL if
1065 * no match or model is NULL.
1066 */
1067 static int asus_model_match(char *model)
1068 {
1069 if (model == NULL)
1070 return END_MODEL;
1071
1072 if (strncmp(model, "L3D", 3) == 0)
1073 return L3D;
1074 else if (strncmp(model, "L2E", 3) == 0 ||
1075 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1076 return L3H;
1077 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1078 return L3C;
1079 else if (strncmp(model, "L8L", 3) == 0)
1080 return L8L;
1081 else if (strncmp(model, "L4R", 3) == 0)
1082 return L4R;
1083 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1084 return M6N;
1085 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1086 return M6R;
1087 else if (strncmp(model, "M2N", 3) == 0 ||
1088 strncmp(model, "M3N", 3) == 0 ||
1089 strncmp(model, "M5N", 3) == 0 ||
1090 strncmp(model, "M6N", 3) == 0 ||
1091 strncmp(model, "S1N", 3) == 0 ||
1092 strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0)
1093 return xxN;
1094 else if (strncmp(model, "M1", 2) == 0)
1095 return M1A;
1096 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1097 return M2E;
1098 else if (strncmp(model, "L2", 2) == 0)
1099 return L2D;
1100 else if (strncmp(model, "L8", 2) == 0)
1101 return S1x;
1102 else if (strncmp(model, "D1", 2) == 0)
1103 return D1x;
1104 else if (strncmp(model, "A1", 2) == 0)
1105 return A1x;
1106 else if (strncmp(model, "A2", 2) == 0)
1107 return A2x;
1108 else if (strncmp(model, "J1", 2) == 0)
1109 return S2x;
1110 else if (strncmp(model, "L5", 2) == 0)
1111 return L5x;
1112 else if (strncmp(model, "A4G", 3) == 0)
1113 return A4G;
1114 else if (strncmp(model, "W1N", 3) == 0)
1115 return W1N;
1116 else if (strncmp(model, "W3V", 3) == 0)
1117 return W3V;
1118 else if (strncmp(model, "W5A", 3) == 0)
1119 return W5A;
1120 else
1121 return END_MODEL;
1122 }
1123
1124 /*
1125 * This function is used to initialize the hotk with right values. In this
1126 * method, we can make all the detection we want, and modify the hotk struct
1127 */
1128 static int asus_hotk_get_info(void)
1129 {
1130 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1131 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
1132 union acpi_object *model = NULL;
1133 int bsts_result;
1134 char *string = NULL;
1135 acpi_status status;
1136
1137 /*
1138 * Get DSDT headers early enough to allow for differentiating between
1139 * models, but late enough to allow acpi_bus_register_driver() to fail
1140 * before doing anything ACPI-specific. Should we encounter a machine,
1141 * which needs special handling (i.e. its hotkey device has a different
1142 * HID), this bit will be moved. A global variable asus_info contains
1143 * the DSDT header.
1144 */
1145 status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
1146 if (ACPI_FAILURE(status))
1147 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1148 else
1149 asus_info = dsdt.pointer;
1150
1151 /* We have to write 0 on init this far for all ASUS models */
1152 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1153 printk(KERN_ERR " Hotkey initialization failed\n");
1154 return -ENODEV;
1155 }
1156
1157 /* This needs to be called for some laptops to init properly */
1158 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1159 printk(KERN_WARNING " Error calling BSTS\n");
1160 else if (bsts_result)
1161 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1162 bsts_result);
1163
1164 /*
1165 * Try to match the object returned by INIT to the specific model.
1166 * Handle every possible object (or the lack of thereof) the DSDT
1167 * writers might throw at us. When in trouble, we pass NULL to
1168 * asus_model_match() and try something completely different.
1169 */
1170 if (buffer.pointer) {
1171 model = buffer.pointer;
1172 switch (model->type) {
1173 case ACPI_TYPE_STRING:
1174 string = model->string.pointer;
1175 break;
1176 case ACPI_TYPE_BUFFER:
1177 string = model->buffer.pointer;
1178 break;
1179 default:
1180 kfree(model);
1181 break;
1182 }
1183 }
1184 hotk->model = asus_model_match(string);
1185 if (hotk->model == END_MODEL) { /* match failed */
1186 if (asus_info &&
1187 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1188 hotk->model = P30;
1189 printk(KERN_NOTICE
1190 " Samsung P30 detected, supported\n");
1191 } else {
1192 hotk->model = M2E;
1193 printk(KERN_NOTICE " unsupported model %s, trying "
1194 "default values\n", string);
1195 printk(KERN_NOTICE
1196 " send /proc/acpi/dsdt to the developers\n");
1197 }
1198 hotk->methods = &model_conf[hotk->model];
1199 return AE_OK;
1200 }
1201 hotk->methods = &model_conf[hotk->model];
1202 printk(KERN_NOTICE " %s model detected, supported\n", string);
1203
1204 /* Sort of per-model blacklist */
1205 if (strncmp(string, "L2B", 3) == 0)
1206 hotk->methods->lcd_status = NULL;
1207 /* L2B is similar enough to L3C to use its settings, with this only
1208 exception */
1209 else if (strncmp(string, "A3G", 3) == 0)
1210 hotk->methods->lcd_status = "\\BLFG";
1211 /* A3G is like M6R */
1212 else if (strncmp(string, "S5N", 3) == 0 ||
1213 strncmp(string, "M5N", 3) == 0 ||
1214 strncmp(string, "W3N", 3) == 0)
1215 hotk->methods->mt_mled = NULL;
1216 /* S5N, M5N and W3N have no MLED */
1217 else if (strncmp(string, "L5D", 3) == 0)
1218 hotk->methods->mt_wled = NULL;
1219 /* L5D's WLED is not controlled by ACPI */
1220 else if (strncmp(string, "M2N", 3) == 0 ||
1221 strncmp(string, "W3V", 3) == 0 ||
1222 strncmp(string, "S1N", 3) == 0)
1223 hotk->methods->mt_wled = "WLED";
1224 /* M2N, S1N and W3V have a usable WLED */
1225 else if (asus_info) {
1226 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1227 hotk->methods->mled_status = NULL;
1228 /* S1300A reports L84F, but L1400B too, account for that */
1229 }
1230
1231 kfree(model);
1232
1233 return AE_OK;
1234 }
1235
1236 static int asus_hotk_check(void)
1237 {
1238 int result = 0;
1239
1240 result = acpi_bus_get_status(hotk->device);
1241 if (result)
1242 return result;
1243
1244 if (hotk->device->status.present) {
1245 result = asus_hotk_get_info();
1246 } else {
1247 printk(KERN_ERR " Hotkey device not present, aborting\n");
1248 return -EINVAL;
1249 }
1250
1251 return result;
1252 }
1253
1254 static int asus_hotk_found;
1255
1256 static int asus_hotk_add(struct acpi_device *device)
1257 {
1258 acpi_status status = AE_OK;
1259 int result;
1260
1261 if (!device)
1262 return -EINVAL;
1263
1264 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1265 ASUS_ACPI_VERSION);
1266
1267 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1268 if (!hotk)
1269 return -ENOMEM;
1270
1271 hotk->handle = device->handle;
1272 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1273 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1274 acpi_driver_data(device) = hotk;
1275 hotk->device = device;
1276
1277 result = asus_hotk_check();
1278 if (result)
1279 goto end;
1280
1281 result = asus_hotk_add_fs(device);
1282 if (result)
1283 goto end;
1284
1285 /*
1286 * We install the handler, it will receive the hotk in parameter, so, we
1287 * could add other data to the hotk struct
1288 */
1289 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1290 asus_hotk_notify, hotk);
1291 if (ACPI_FAILURE(status))
1292 printk(KERN_ERR " Error installing notify handler\n");
1293
1294 /* For laptops without GPLV: init the hotk->brightness value */
1295 if ((!hotk->methods->brightness_get)
1296 && (!hotk->methods->brightness_status)
1297 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1298 status =
1299 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1300 NULL, NULL);
1301 if (ACPI_FAILURE(status))
1302 printk(KERN_WARNING " Error changing brightness\n");
1303 else {
1304 status =
1305 acpi_evaluate_object(NULL,
1306 hotk->methods->brightness_up,
1307 NULL, NULL);
1308 if (ACPI_FAILURE(status))
1309 printk(KERN_WARNING " Strange, error changing"
1310 " brightness\n");
1311 }
1312 }
1313
1314 asus_hotk_found = 1;
1315
1316 /* LED display is off by default */
1317 hotk->ledd_status = 0xFFF;
1318
1319 end:
1320 if (result) {
1321 kfree(hotk);
1322 }
1323
1324 return result;
1325 }
1326
1327 static int asus_hotk_remove(struct acpi_device *device, int type)
1328 {
1329 acpi_status status = 0;
1330
1331 if (!device || !acpi_driver_data(device))
1332 return -EINVAL;
1333
1334 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1335 asus_hotk_notify);
1336 if (ACPI_FAILURE(status))
1337 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1338
1339 asus_hotk_remove_fs(device);
1340
1341 kfree(hotk);
1342
1343 return 0;
1344 }
1345
1346 static struct backlight_properties asus_backlight_data = {
1347 .owner = THIS_MODULE,
1348 .get_brightness = read_brightness,
1349 .update_status = set_brightness_status,
1350 .max_brightness = 15,
1351 };
1352
1353 static void __exit asus_acpi_exit(void)
1354 {
1355 if (asus_backlight_device)
1356 backlight_device_unregister(asus_backlight_device);
1357
1358 acpi_bus_unregister_driver(&asus_hotk_driver);
1359 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1360
1361 kfree(asus_info);
1362
1363 return;
1364 }
1365
1366 static int __init asus_acpi_init(void)
1367 {
1368 int result;
1369
1370 if (acpi_disabled)
1371 return -ENODEV;
1372
1373 if (!acpi_specific_hotkey_enabled) {
1374 printk(KERN_ERR "Using generic hotkey driver\n");
1375 return -ENODEV;
1376 }
1377 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1378 if (!asus_proc_dir) {
1379 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1380 return -ENODEV;
1381 }
1382 asus_proc_dir->owner = THIS_MODULE;
1383
1384 result = acpi_bus_register_driver(&asus_hotk_driver);
1385 if (result < 0) {
1386 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1387 return result;
1388 }
1389
1390 /*
1391 * This is a bit of a kludge. We only want this module loaded
1392 * for ASUS systems, but there's currently no way to probe the
1393 * ACPI namespace for ASUS HIDs. So we just return failure if
1394 * we didn't find one, which will cause the module to be
1395 * unloaded.
1396 */
1397 if (!asus_hotk_found) {
1398 acpi_bus_unregister_driver(&asus_hotk_driver);
1399 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1400 return result;
1401 }
1402
1403 asus_backlight_device = backlight_device_register("asus",NULL,NULL,
1404 &asus_backlight_data);
1405 if (IS_ERR(asus_backlight_device)) {
1406 printk(KERN_ERR "Could not register asus backlight device\n");
1407 asus_backlight_device = NULL;
1408 asus_acpi_exit();
1409 }
1410
1411 return 0;
1412 }
1413
1414 module_init(asus_acpi_init);
1415 module_exit(asus_acpi_exit);
linux v2.6.22.y-op