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