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asus-acpi: set acpi_driver.owner
[linux-2.6/btrfs-unstable.git] / drivers / platform / x86 / asus_acpi.c
blob0c9c53111a22edaa9ede19af2b71c3c2aab6c408
1 /*
2 * asus_acpi.c - Asus Laptop ACPI Extras
3 *
4 *
5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 *
22 * The development page for this driver is located at
23 * http://sourceforge.net/projects/acpi4asus/
24 *
25 * Credits:
26 * Pontus Fuchs - Helper functions, cleanup
27 * Johann Wiesner - Small compile fixes
28 * John Belmonte - ACPI code for Toshiba laptop was a good starting point.
29 * �ic Burghard - LED display support for W1N
30 *
31 */
32
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/types.h>
37 #include <linux/proc_fs.h>
38 #include <linux/backlight.h>
39 #include <acpi/acpi_drivers.h>
40 #include <acpi/acpi_bus.h>
41 #include <asm/uaccess.h>
42
43 #define ASUS_ACPI_VERSION "0.30"
44
45 #define PROC_ASUS "asus" /* The directory */
46 #define PROC_MLED "mled"
47 #define PROC_WLED "wled"
48 #define PROC_TLED "tled"
49 #define PROC_BT "bluetooth"
50 #define PROC_LEDD "ledd"
51 #define PROC_INFO "info"
52 #define PROC_LCD "lcd"
53 #define PROC_BRN "brn"
54 #define PROC_DISP "disp"
55
56 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
57 #define ACPI_HOTK_CLASS "hotkey"
58 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
59
60 /*
61 * Some events we use, same for all Asus
62 */
63 #define BR_UP 0x10
64 #define BR_DOWN 0x20
65
66 /*
67 * Flags for hotk status
68 */
69 #define MLED_ON 0x01 /* Mail LED */
70 #define WLED_ON 0x02 /* Wireless LED */
71 #define TLED_ON 0x04 /* Touchpad LED */
72 #define BT_ON 0x08 /* Internal Bluetooth */
73
74 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
75 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
76 MODULE_LICENSE("GPL");
77
78 static uid_t asus_uid;
79 static gid_t asus_gid;
80 module_param(asus_uid, uint, 0);
81 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus");
82 module_param(asus_gid, uint, 0);
83 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
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; /* method to set brightness down ____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,
143 S1300N, S5200N*/
144 A4S, /* Z81sp */
145 F3Sa, /* (Centrino) */
146 R1F,
147 END_MODEL
148 } model; /* Models currently supported */
149 u16 event_count[128]; /* Count for each event TODO make this better */
150 };
151
152 /* Here we go */
153 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
154 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
155 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
156 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
157 #define S1x_PREFIX "\\_SB.PCI0.PX40."
158 #define S2x_PREFIX A1x_PREFIX
159 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
160
161 static struct model_data model_conf[END_MODEL] = {
162 /*
163 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
164 * it seems to be a kind of switch, but what for ?
165 */
166
167 {
168 .name = "A1x",
169 .mt_mled = "MLED",
170 .mled_status = "\\MAIL",
171 .mt_lcd_switch = A1x_PREFIX "_Q10",
172 .lcd_status = "\\BKLI",
173 .brightness_up = A1x_PREFIX "_Q0E",
174 .brightness_down = A1x_PREFIX "_Q0F"},
175
176 {
177 .name = "A2x",
178 .mt_mled = "MLED",
179 .mt_wled = "WLED",
180 .wled_status = "\\SG66",
181 .mt_lcd_switch = "\\Q10",
182 .lcd_status = "\\BAOF",
183 .brightness_set = "SPLV",
184 .brightness_get = "GPLV",
185 .display_set = "SDSP",
186 .display_get = "\\INFB"},
187
188 {
189 .name = "A4G",
190 .mt_mled = "MLED",
191 /* WLED present, but not controlled by ACPI */
192 .mt_lcd_switch = xxN_PREFIX "_Q10",
193 .brightness_set = "SPLV",
194 .brightness_get = "GPLV",
195 .display_set = "SDSP",
196 .display_get = "\\ADVG"},
197
198 {
199 .name = "D1x",
200 .mt_mled = "MLED",
201 .mt_lcd_switch = "\\Q0D",
202 .lcd_status = "\\GP11",
203 .brightness_up = "\\Q0C",
204 .brightness_down = "\\Q0B",
205 .brightness_status = "\\BLVL",
206 .display_set = "SDSP",
207 .display_get = "\\INFB"},
208
209 {
210 .name = "L2D",
211 .mt_mled = "MLED",
212 .mled_status = "\\SGP6",
213 .mt_wled = "WLED",
214 .wled_status = "\\RCP3",
215 .mt_lcd_switch = "\\Q10",
216 .lcd_status = "\\SGP0",
217 .brightness_up = "\\Q0E",
218 .brightness_down = "\\Q0F",
219 .display_set = "SDSP",
220 .display_get = "\\INFB"},
221
222 {
223 .name = "L3C",
224 .mt_mled = "MLED",
225 .mt_wled = "WLED",
226 .mt_lcd_switch = L3C_PREFIX "_Q10",
227 .lcd_status = "\\GL32",
228 .brightness_set = "SPLV",
229 .brightness_get = "GPLV",
230 .display_set = "SDSP",
231 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
232
233 {
234 .name = "L3D",
235 .mt_mled = "MLED",
236 .mled_status = "\\MALD",
237 .mt_wled = "WLED",
238 .mt_lcd_switch = "\\Q10",
239 .lcd_status = "\\BKLG",
240 .brightness_set = "SPLV",
241 .brightness_get = "GPLV",
242 .display_set = "SDSP",
243 .display_get = "\\INFB"},
244
245 {
246 .name = "L3H",
247 .mt_mled = "MLED",
248 .mt_wled = "WLED",
249 .mt_lcd_switch = "EHK",
250 .lcd_status = "\\_SB.PCI0.PM.PBC",
251 .brightness_set = "SPLV",
252 .brightness_get = "GPLV",
253 .display_set = "SDSP",
254 .display_get = "\\INFB"},
255
256 {
257 .name = "L4R",
258 .mt_mled = "MLED",
259 .mt_wled = "WLED",
260 .wled_status = "\\_SB.PCI0.SBRG.SG13",
261 .mt_lcd_switch = xxN_PREFIX "_Q10",
262 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
263 .brightness_set = "SPLV",
264 .brightness_get = "GPLV",
265 .display_set = "SDSP",
266 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
267
268 {
269 .name = "L5x",
270 .mt_mled = "MLED",
271 /* WLED present, but not controlled by ACPI */
272 .mt_tled = "TLED",
273 .mt_lcd_switch = "\\Q0D",
274 .lcd_status = "\\BAOF",
275 .brightness_set = "SPLV",
276 .brightness_get = "GPLV",
277 .display_set = "SDSP",
278 .display_get = "\\INFB"},
279
280 {
281 .name = "L8L"
282 /* No features, but at least support the hotkeys */
283 },
284
285 {
286 .name = "M1A",
287 .mt_mled = "MLED",
288 .mt_lcd_switch = M1A_PREFIX "Q10",
289 .lcd_status = "\\PNOF",
290 .brightness_up = M1A_PREFIX "Q0E",
291 .brightness_down = M1A_PREFIX "Q0F",
292 .brightness_status = "\\BRIT",
293 .display_set = "SDSP",
294 .display_get = "\\INFB"},
295
296 {
297 .name = "M2E",
298 .mt_mled = "MLED",
299 .mt_wled = "WLED",
300 .mt_lcd_switch = "\\Q10",
301 .lcd_status = "\\GP06",
302 .brightness_set = "SPLV",
303 .brightness_get = "GPLV",
304 .display_set = "SDSP",
305 .display_get = "\\INFB"},
306
307 {
308 .name = "M6N",
309 .mt_mled = "MLED",
310 .mt_wled = "WLED",
311 .wled_status = "\\_SB.PCI0.SBRG.SG13",
312 .mt_lcd_switch = xxN_PREFIX "_Q10",
313 .lcd_status = "\\_SB.BKLT",
314 .brightness_set = "SPLV",
315 .brightness_get = "GPLV",
316 .display_set = "SDSP",
317 .display_get = "\\SSTE"},
318
319 {
320 .name = "M6R",
321 .mt_mled = "MLED",
322 .mt_wled = "WLED",
323 .mt_lcd_switch = xxN_PREFIX "_Q10",
324 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
325 .brightness_set = "SPLV",
326 .brightness_get = "GPLV",
327 .display_set = "SDSP",
328 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
329
330 {
331 .name = "P30",
332 .mt_wled = "WLED",
333 .mt_lcd_switch = P30_PREFIX "_Q0E",
334 .lcd_status = "\\BKLT",
335 .brightness_up = P30_PREFIX "_Q68",
336 .brightness_down = P30_PREFIX "_Q69",
337 .brightness_get = "GPLV",
338 .display_set = "SDSP",
339 .display_get = "\\DNXT"},
340
341 {
342 .name = "S1x",
343 .mt_mled = "MLED",
344 .mled_status = "\\EMLE",
345 .mt_wled = "WLED",
346 .mt_lcd_switch = S1x_PREFIX "Q10",
347 .lcd_status = "\\PNOF",
348 .brightness_set = "SPLV",
349 .brightness_get = "GPLV"},
350
351 {
352 .name = "S2x",
353 .mt_mled = "MLED",
354 .mled_status = "\\MAIL",
355 .mt_lcd_switch = S2x_PREFIX "_Q10",
356 .lcd_status = "\\BKLI",
357 .brightness_up = S2x_PREFIX "_Q0B",
358 .brightness_down = S2x_PREFIX "_Q0A"},
359
360 {
361 .name = "W1N",
362 .mt_mled = "MLED",
363 .mt_wled = "WLED",
364 .mt_ledd = "SLCM",
365 .mt_lcd_switch = xxN_PREFIX "_Q10",
366 .lcd_status = "\\BKLT",
367 .brightness_set = "SPLV",
368 .brightness_get = "GPLV",
369 .display_set = "SDSP",
370 .display_get = "\\ADVG"},
371
372 {
373 .name = "W5A",
374 .mt_bt_switch = "BLED",
375 .mt_wled = "WLED",
376 .mt_lcd_switch = xxN_PREFIX "_Q10",
377 .brightness_set = "SPLV",
378 .brightness_get = "GPLV",
379 .display_set = "SDSP",
380 .display_get = "\\ADVG"},
381
382 {
383 .name = "W3V",
384 .mt_mled = "MLED",
385 .mt_wled = "WLED",
386 .mt_lcd_switch = xxN_PREFIX "_Q10",
387 .lcd_status = "\\BKLT",
388 .brightness_set = "SPLV",
389 .brightness_get = "GPLV",
390 .display_set = "SDSP",
391 .display_get = "\\INFB"},
392
393 {
394 .name = "xxN",
395 .mt_mled = "MLED",
396 /* WLED present, but not controlled by ACPI */
397 .mt_lcd_switch = xxN_PREFIX "_Q10",
398 .lcd_status = "\\BKLT",
399 .brightness_set = "SPLV",
400 .brightness_get = "GPLV",
401 .display_set = "SDSP",
402 .display_get = "\\ADVG"},
403
404 {
405 .name = "A4S",
406 .brightness_set = "SPLV",
407 .brightness_get = "GPLV",
408 .mt_bt_switch = "BLED",
409 .mt_wled = "WLED"
410 },
411
412 {
413 .name = "F3Sa",
414 .mt_bt_switch = "BLED",
415 .mt_wled = "WLED",
416 .mt_mled = "MLED",
417 .brightness_get = "GPLV",
418 .brightness_set = "SPLV",
419 .mt_lcd_switch = "\\_SB.PCI0.SBRG.EC0._Q10",
420 .lcd_status = "\\_SB.PCI0.SBRG.EC0.RPIN",
421 .display_get = "\\ADVG",
422 .display_set = "SDSP",
423 },
424 {
425 .name = "R1F",
426 .mt_bt_switch = "BLED",
427 .mt_mled = "MLED",
428 .mt_wled = "WLED",
429 .mt_lcd_switch = "\\Q10",
430 .lcd_status = "\\GP06",
431 .brightness_set = "SPLV",
432 .brightness_get = "GPLV",
433 .display_set = "SDSP",
434 .display_get = "\\INFB"
435 }
436 };
437
438 /* procdir we use */
439 static struct proc_dir_entry *asus_proc_dir;
440
441 static struct backlight_device *asus_backlight_device;
442
443 /*
444 * This header is made available to allow proper configuration given model,
445 * revision number , ... this info cannot go in struct asus_hotk because it is
446 * available before the hotk
447 */
448 static struct acpi_table_header *asus_info;
449
450 /* The actual device the driver binds to */
451 static struct asus_hotk *hotk;
452
453 /*
454 * The hotkey driver and autoloading declaration
455 */
456 static int asus_hotk_add(struct acpi_device *device);
457 static int asus_hotk_remove(struct acpi_device *device, int type);
458 static void asus_hotk_notify(struct acpi_device *device, u32 event);
459
460 static const struct acpi_device_id asus_device_ids[] = {
461 {"ATK0100", 0},
462 {"", 0},
463 };
464 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
465
466 static struct acpi_driver asus_hotk_driver = {
467 .name = "asus_acpi",
468 .class = ACPI_HOTK_CLASS,
469 .owner = THIS_MODULE,
470 .ids = asus_device_ids,
471 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
472 .ops = {
473 .add = asus_hotk_add,
474 .remove = asus_hotk_remove,
475 .notify = asus_hotk_notify,
476 },
477 };
478
479 /*
480 * This function evaluates an ACPI method, given an int as parameter, the
481 * method is searched within the scope of the handle, can be NULL. The output
482 * of the method is written is output, which can also be NULL
483 *
484 * returns 1 if write is successful, 0 else.
485 */
486 static int write_acpi_int(acpi_handle handle, const char *method, int val,
487 struct acpi_buffer *output)
488 {
489 struct acpi_object_list params; /* list of input parameters (int) */
490 union acpi_object in_obj; /* the only param we use */
491 acpi_status status;
492
493 params.count = 1;
494 params.pointer = &in_obj;
495 in_obj.type = ACPI_TYPE_INTEGER;
496 in_obj.integer.value = val;
497
498 status = acpi_evaluate_object(handle, (char *)method, &params, output);
499 return (status == AE_OK);
500 }
501
502 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
503 {
504 struct acpi_buffer output;
505 union acpi_object out_obj;
506 acpi_status status;
507
508 output.length = sizeof(out_obj);
509 output.pointer = &out_obj;
510
511 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
512 *val = out_obj.integer.value;
513 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
514 }
515
516 /*
517 * We write our info in page, we begin at offset off and cannot write more
518 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
519 * number of bytes written in page
520 */
521 static int
522 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
523 void *data)
524 {
525 int len = 0;
526 int temp;
527 char buf[16]; /* enough for all info */
528 /*
529 * We use the easy way, we don't care of off and count,
530 * so we don't set eof to 1
531 */
532
533 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
534 len += sprintf(page + len, "Model reference : %s\n",
535 hotk->methods->name);
536 /*
537 * The SFUN method probably allows the original driver to get the list
538 * of features supported by a given model. For now, 0x0100 or 0x0800
539 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
540 * The significance of others is yet to be found.
541 */
542 if (read_acpi_int(hotk->handle, "SFUN", &temp))
543 len +=
544 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
545 /*
546 * Another value for userspace: the ASYM method returns 0x02 for
547 * battery low and 0x04 for battery critical, its readings tend to be
548 * more accurate than those provided by _BST.
549 * Note: since not all the laptops provide this method, errors are
550 * silently ignored.
551 */
552 if (read_acpi_int(hotk->handle, "ASYM", &temp))
553 len +=
554 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
555 if (asus_info) {
556 snprintf(buf, 16, "%d", asus_info->length);
557 len += sprintf(page + len, "DSDT length : %s\n", buf);
558 snprintf(buf, 16, "%d", asus_info->checksum);
559 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
560 snprintf(buf, 16, "%d", asus_info->revision);
561 len += sprintf(page + len, "DSDT revision : %s\n", buf);
562 snprintf(buf, 7, "%s", asus_info->oem_id);
563 len += sprintf(page + len, "OEM id : %s\n", buf);
564 snprintf(buf, 9, "%s", asus_info->oem_table_id);
565 len += sprintf(page + len, "OEM table id : %s\n", buf);
566 snprintf(buf, 16, "%x", asus_info->oem_revision);
567 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
568 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
569 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
570 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
571 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
572 }
573
574 return len;
575 }
576
577 /*
578 * /proc handlers
579 * We write our info in page, we begin at offset off and cannot write more
580 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
581 * number of bytes written in page
582 */
583
584 /* Generic LED functions */
585 static int read_led(const char *ledname, int ledmask)
586 {
587 if (ledname) {
588 int led_status;
589
590 if (read_acpi_int(NULL, ledname, &led_status))
591 return led_status;
592 else
593 printk(KERN_WARNING "Asus ACPI: Error reading LED "
594 "status\n");
595 }
596 return (hotk->status & ledmask) ? 1 : 0;
597 }
598
599 static int parse_arg(const char __user *buf, unsigned long count, int *val)
600 {
601 char s[32];
602 if (!count)
603 return 0;
604 if (count > 31)
605 return -EINVAL;
606 if (copy_from_user(s, buf, count))
607 return -EFAULT;
608 s[count] = 0;
609 if (sscanf(s, "%i", val) != 1)
610 return -EINVAL;
611 return count;
612 }
613
614 /* FIXME: kill extraneous args so it can be called independently */
615 static int
616 write_led(const char __user *buffer, unsigned long count,
617 char *ledname, int ledmask, int invert)
618 {
619 int rv, value;
620 int led_out = 0;
621
622 rv = parse_arg(buffer, count, &value);
623 if (rv > 0)
624 led_out = value ? 1 : 0;
625
626 hotk->status =
627 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
628
629 if (invert) /* invert target value */
630 led_out = !led_out;
631
632 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
633 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
634 ledname);
635
636 return rv;
637 }
638
639 /*
640 * Proc handlers for MLED
641 */
642 static int
643 proc_read_mled(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->mled_status, MLED_ON));
648 }
649
650 static int
651 proc_write_mled(struct file *file, const char __user *buffer,
652 unsigned long count, void *data)
653 {
654 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
655 }
656
657 /*
658 * Proc handlers for LED display
659 */
660 static int
661 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
662 void *data)
663 {
664 return sprintf(page, "0x%08x\n", hotk->ledd_status);
665 }
666
667 static int
668 proc_write_ledd(struct file *file, const char __user *buffer,
669 unsigned long count, void *data)
670 {
671 int rv, value;
672
673 rv = parse_arg(buffer, count, &value);
674 if (rv > 0) {
675 if (!write_acpi_int
676 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
677 printk(KERN_WARNING
678 "Asus ACPI: LED display write failed\n");
679 else
680 hotk->ledd_status = (u32) value;
681 }
682 return rv;
683 }
684
685 /*
686 * Proc handlers for WLED
687 */
688 static int
689 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
690 void *data)
691 {
692 return sprintf(page, "%d\n",
693 read_led(hotk->methods->wled_status, WLED_ON));
694 }
695
696 static int
697 proc_write_wled(struct file *file, const char __user *buffer,
698 unsigned long count, void *data)
699 {
700 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
701 }
702
703 /*
704 * Proc handlers for Bluetooth
705 */
706 static int
707 proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
708 void *data)
709 {
710 return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
711 }
712
713 static int
714 proc_write_bluetooth(struct file *file, const char __user *buffer,
715 unsigned long count, void *data)
716 {
717 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
718 presence and its LED */
719 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
720 }
721
722 /*
723 * Proc handlers for TLED
724 */
725 static int
726 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
727 void *data)
728 {
729 return sprintf(page, "%d\n",
730 read_led(hotk->methods->tled_status, TLED_ON));
731 }
732
733 static int
734 proc_write_tled(struct file *file, const char __user *buffer,
735 unsigned long count, void *data)
736 {
737 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
738 }
739
740 static int get_lcd_state(void)
741 {
742 int lcd = 0;
743
744 if (hotk->model == L3H) {
745 /* L3H and the like have to be handled differently */
746 acpi_status status = 0;
747 struct acpi_object_list input;
748 union acpi_object mt_params[2];
749 struct acpi_buffer output;
750 union acpi_object out_obj;
751
752 input.count = 2;
753 input.pointer = mt_params;
754 /* Note: the following values are partly guessed up, but
755 otherwise they seem to work */
756 mt_params[0].type = ACPI_TYPE_INTEGER;
757 mt_params[0].integer.value = 0x02;
758 mt_params[1].type = ACPI_TYPE_INTEGER;
759 mt_params[1].integer.value = 0x02;
760
761 output.length = sizeof(out_obj);
762 output.pointer = &out_obj;
763
764 status =
765 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
766 &input, &output);
767 if (status != AE_OK)
768 return -1;
769 if (out_obj.type == ACPI_TYPE_INTEGER)
770 /* That's what the AML code does */
771 lcd = out_obj.integer.value >> 8;
772 } else if (hotk->model == F3Sa) {
773 unsigned long long tmp;
774 union acpi_object param;
775 struct acpi_object_list input;
776 acpi_status status;
777
778 /* Read pin 11 */
779 param.type = ACPI_TYPE_INTEGER;
780 param.integer.value = 0x11;
781 input.count = 1;
782 input.pointer = &param;
783
784 status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
785 &input, &tmp);
786 if (status != AE_OK)
787 return -1;
788
789 lcd = tmp;
790 } else {
791 /* We don't have to check anything if we are here */
792 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
793 printk(KERN_WARNING
794 "Asus ACPI: Error reading LCD status\n");
795
796 if (hotk->model == L2D)
797 lcd = ~lcd;
798 }
799
800 return (lcd & 1);
801 }
802
803 static int set_lcd_state(int value)
804 {
805 int lcd = 0;
806 acpi_status status = 0;
807
808 lcd = value ? 1 : 0;
809 if (lcd != get_lcd_state()) {
810 /* switch */
811 if (hotk->model != L3H) {
812 status =
813 acpi_evaluate_object(NULL,
814 hotk->methods->mt_lcd_switch,
815 NULL, NULL);
816 } else {
817 /* L3H and the like must be handled differently */
818 if (!write_acpi_int
819 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
820 NULL))
821 status = AE_ERROR;
822 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
823 the exact behaviour is simulated here */
824 }
825 if (ACPI_FAILURE(status))
826 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
827 }
828 return 0;
829
830 }
831
832 static int
833 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
834 void *data)
835 {
836 return sprintf(page, "%d\n", get_lcd_state());
837 }
838
839 static int
840 proc_write_lcd(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 set_lcd_state(value);
848 return rv;
849 }
850
851 static int read_brightness(struct backlight_device *bd)
852 {
853 int value;
854
855 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
856 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
857 &value))
858 printk(KERN_WARNING
859 "Asus ACPI: Error reading brightness\n");
860 } else if (hotk->methods->brightness_status) { /* For D1 for example */
861 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
862 &value))
863 printk(KERN_WARNING
864 "Asus ACPI: Error reading brightness\n");
865 } else /* No GPLV method */
866 value = hotk->brightness;
867 return value;
868 }
869
870 /*
871 * Change the brightness level
872 */
873 static int set_brightness(int value)
874 {
875 acpi_status status = 0;
876 int ret = 0;
877
878 /* SPLV laptop */
879 if (hotk->methods->brightness_set) {
880 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
881 value, NULL))
882 printk(KERN_WARNING
883 "Asus ACPI: Error changing brightness\n");
884 ret = -EIO;
885 goto out;
886 }
887
888 /* No SPLV method if we are here, act as appropriate */
889 value -= read_brightness(NULL);
890 while (value != 0) {
891 status = acpi_evaluate_object(NULL, (value > 0) ?
892 hotk->methods->brightness_up :
893 hotk->methods->brightness_down,
894 NULL, NULL);
895 (value > 0) ? value-- : value++;
896 if (ACPI_FAILURE(status))
897 printk(KERN_WARNING
898 "Asus ACPI: Error changing brightness\n");
899 ret = -EIO;
900 }
901 out:
902 return ret;
903 }
904
905 static int set_brightness_status(struct backlight_device *bd)
906 {
907 return set_brightness(bd->props.brightness);
908 }
909
910 static int
911 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
912 void *data)
913 {
914 return sprintf(page, "%d\n", read_brightness(NULL));
915 }
916
917 static int
918 proc_write_brn(struct file *file, const char __user *buffer,
919 unsigned long count, void *data)
920 {
921 int rv, value;
922
923 rv = parse_arg(buffer, count, &value);
924 if (rv > 0) {
925 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
926 /* 0 <= value <= 15 */
927 set_brightness(value);
928 }
929 return rv;
930 }
931
932 static void set_display(int value)
933 {
934 /* no sanity check needed for now */
935 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
936 value, NULL))
937 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
938 return;
939 }
940
941 /*
942 * Now, *this* one could be more user-friendly, but so far, no-one has
943 * complained. The significance of bits is the same as in proc_write_disp()
944 */
945 static int
946 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
947 void *data)
948 {
949 int value = 0;
950
951 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
952 printk(KERN_WARNING
953 "Asus ACPI: Error reading display status\n");
954 value &= 0x07; /* needed for some models, shouldn't hurt others */
955 return sprintf(page, "%d\n", value);
956 }
957
958 /*
959 * Experimental support for display switching. As of now: 1 should activate
960 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
961 * (bitwise) of these will suffice. I never actually tested 3 displays hooked
962 * up simultaneously, so be warned. See the acpi4asus README for more info.
963 */
964 static int
965 proc_write_disp(struct file *file, const char __user *buffer,
966 unsigned long count, void *data)
967 {
968 int rv, value;
969
970 rv = parse_arg(buffer, count, &value);
971 if (rv > 0)
972 set_display(value);
973 return rv;
974 }
975
976 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
977 int *eof, void *data);
978 typedef int (proc_writefunc) (struct file *file, const char __user *buffer,
979 unsigned long count, void *data);
980
981 static int
982 asus_proc_add(char *name, proc_writefunc *writefunc,
983 proc_readfunc *readfunc, mode_t mode,
984 struct acpi_device *device)
985 {
986 struct proc_dir_entry *proc =
987 create_proc_entry(name, mode, acpi_device_dir(device));
988 if (!proc) {
989 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
990 return -1;
991 }
992 proc->write_proc = writefunc;
993 proc->read_proc = readfunc;
994 proc->data = acpi_driver_data(device);
995 proc->uid = asus_uid;
996 proc->gid = asus_gid;
997 return 0;
998 }
999
1000 static int asus_hotk_add_fs(struct acpi_device *device)
1001 {
1002 struct proc_dir_entry *proc;
1003 mode_t mode;
1004
1005 /*
1006 * If parameter uid or gid is not changed, keep the default setting for
1007 * our proc entries (-rw-rw-rw-) else, it means we care about security,
1008 * and then set to -rw-rw----
1009 */
1010
1011 if ((asus_uid == 0) && (asus_gid == 0)) {
1012 mode = S_IFREG | S_IRUGO | S_IWUGO;
1013 } else {
1014 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
1015 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
1016 "deprecated, use chown and chmod instead!\n");
1017 }
1018
1019 acpi_device_dir(device) = asus_proc_dir;
1020 if (!acpi_device_dir(device))
1021 return -ENODEV;
1022
1023 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
1024 if (proc) {
1025 proc->read_proc = proc_read_info;
1026 proc->data = acpi_driver_data(device);
1027 proc->uid = asus_uid;
1028 proc->gid = asus_gid;
1029 } else {
1030 printk(KERN_WARNING " Unable to create " PROC_INFO
1031 " fs entry\n");
1032 }
1033
1034 if (hotk->methods->mt_wled) {
1035 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
1036 mode, device);
1037 }
1038
1039 if (hotk->methods->mt_ledd) {
1040 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
1041 mode, device);
1042 }
1043
1044 if (hotk->methods->mt_mled) {
1045 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
1046 mode, device);
1047 }
1048
1049 if (hotk->methods->mt_tled) {
1050 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
1051 mode, device);
1052 }
1053
1054 if (hotk->methods->mt_bt_switch) {
1055 asus_proc_add(PROC_BT, &proc_write_bluetooth,
1056 &proc_read_bluetooth, mode, device);
1057 }
1058
1059 /*
1060 * We need both read node and write method as LCD switch is also
1061 * accessible from the keyboard
1062 */
1063 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
1064 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
1065 device);
1066 }
1067
1068 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
1069 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
1070 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
1071 device);
1072 }
1073
1074 if (hotk->methods->display_set) {
1075 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
1076 mode, device);
1077 }
1078
1079 return 0;
1080 }
1081
1082 static int asus_hotk_remove_fs(struct acpi_device *device)
1083 {
1084 if (acpi_device_dir(device)) {
1085 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1086 if (hotk->methods->mt_wled)
1087 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1088 if (hotk->methods->mt_mled)
1089 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1090 if (hotk->methods->mt_tled)
1091 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1092 if (hotk->methods->mt_ledd)
1093 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1094 if (hotk->methods->mt_bt_switch)
1095 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1096 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1097 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1098 if ((hotk->methods->brightness_up
1099 && hotk->methods->brightness_down)
1100 || (hotk->methods->brightness_get
1101 && hotk->methods->brightness_set))
1102 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1103 if (hotk->methods->display_set)
1104 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1105 }
1106 return 0;
1107 }
1108
1109 static void asus_hotk_notify(struct acpi_device *device, u32 event)
1110 {
1111 /* TODO Find a better way to handle events count. */
1112 if (!hotk)
1113 return;
1114
1115 /*
1116 * The BIOS *should* be sending us device events, but apparently
1117 * Asus uses system events instead, so just ignore any device
1118 * events we get.
1119 */
1120 if (event > ACPI_MAX_SYS_NOTIFY)
1121 return;
1122
1123 if ((event & ~((u32) BR_UP)) < 16)
1124 hotk->brightness = (event & ~((u32) BR_UP));
1125 else if ((event & ~((u32) BR_DOWN)) < 16)
1126 hotk->brightness = (event & ~((u32) BR_DOWN));
1127
1128 acpi_bus_generate_proc_event(hotk->device, event,
1129 hotk->event_count[event % 128]++);
1130
1131 return;
1132 }
1133
1134 /*
1135 * Match the model string to the list of supported models. Return END_MODEL if
1136 * no match or model is NULL.
1137 */
1138 static int asus_model_match(char *model)
1139 {
1140 if (model == NULL)
1141 return END_MODEL;
1142
1143 if (strncmp(model, "L3D", 3) == 0)
1144 return L3D;
1145 else if (strncmp(model, "L2E", 3) == 0 ||
1146 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1147 return L3H;
1148 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1149 return L3C;
1150 else if (strncmp(model, "L8L", 3) == 0)
1151 return L8L;
1152 else if (strncmp(model, "L4R", 3) == 0)
1153 return L4R;
1154 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1155 return M6N;
1156 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1157 return M6R;
1158 else if (strncmp(model, "M2N", 3) == 0 ||
1159 strncmp(model, "M3N", 3) == 0 ||
1160 strncmp(model, "M5N", 3) == 0 ||
1161 strncmp(model, "M6N", 3) == 0 ||
1162 strncmp(model, "S1N", 3) == 0 ||
1163 strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0)
1164 return xxN;
1165 else if (strncmp(model, "M1", 2) == 0)
1166 return M1A;
1167 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1168 return M2E;
1169 else if (strncmp(model, "L2", 2) == 0)
1170 return L2D;
1171 else if (strncmp(model, "L8", 2) == 0)
1172 return S1x;
1173 else if (strncmp(model, "D1", 2) == 0)
1174 return D1x;
1175 else if (strncmp(model, "A1", 2) == 0)
1176 return A1x;
1177 else if (strncmp(model, "A2", 2) == 0)
1178 return A2x;
1179 else if (strncmp(model, "J1", 2) == 0)
1180 return S2x;
1181 else if (strncmp(model, "L5", 2) == 0)
1182 return L5x;
1183 else if (strncmp(model, "A4G", 3) == 0)
1184 return A4G;
1185 else if (strncmp(model, "W1N", 3) == 0)
1186 return W1N;
1187 else if (strncmp(model, "W3V", 3) == 0)
1188 return W3V;
1189 else if (strncmp(model, "W5A", 3) == 0)
1190 return W5A;
1191 else if (strncmp(model, "R1F", 3) == 0)
1192 return R1F;
1193 else if (strncmp(model, "A4S", 3) == 0)
1194 return A4S;
1195 else if (strncmp(model, "F3Sa", 4) == 0)
1196 return F3Sa;
1197 else
1198 return END_MODEL;
1199 }
1200
1201 /*
1202 * This function is used to initialize the hotk with right values. In this
1203 * method, we can make all the detection we want, and modify the hotk struct
1204 */
1205 static int asus_hotk_get_info(void)
1206 {
1207 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1208 union acpi_object *model = NULL;
1209 int bsts_result;
1210 char *string = NULL;
1211 acpi_status status;
1212
1213 /*
1214 * Get DSDT headers early enough to allow for differentiating between
1215 * models, but late enough to allow acpi_bus_register_driver() to fail
1216 * before doing anything ACPI-specific. Should we encounter a machine,
1217 * which needs special handling (i.e. its hotkey device has a different
1218 * HID), this bit will be moved. A global variable asus_info contains
1219 * the DSDT header.
1220 */
1221 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
1222 if (ACPI_FAILURE(status))
1223 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1224
1225 /* We have to write 0 on init this far for all ASUS models */
1226 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1227 printk(KERN_ERR " Hotkey initialization failed\n");
1228 return -ENODEV;
1229 }
1230
1231 /* This needs to be called for some laptops to init properly */
1232 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1233 printk(KERN_WARNING " Error calling BSTS\n");
1234 else if (bsts_result)
1235 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1236 bsts_result);
1237
1238 /*
1239 * Try to match the object returned by INIT to the specific model.
1240 * Handle every possible object (or the lack of thereof) the DSDT
1241 * writers might throw at us. When in trouble, we pass NULL to
1242 * asus_model_match() and try something completely different.
1243 */
1244 if (buffer.pointer) {
1245 model = buffer.pointer;
1246 switch (model->type) {
1247 case ACPI_TYPE_STRING:
1248 string = model->string.pointer;
1249 break;
1250 case ACPI_TYPE_BUFFER:
1251 string = model->buffer.pointer;
1252 break;
1253 default:
1254 kfree(model);
1255 model = NULL;
1256 break;
1257 }
1258 }
1259 hotk->model = asus_model_match(string);
1260 if (hotk->model == END_MODEL) { /* match failed */
1261 if (asus_info &&
1262 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1263 hotk->model = P30;
1264 printk(KERN_NOTICE
1265 " Samsung P30 detected, supported\n");
1266 } else {
1267 hotk->model = M2E;
1268 printk(KERN_NOTICE " unsupported model %s, trying "
1269 "default values\n", string);
1270 printk(KERN_NOTICE
1271 " send /proc/acpi/dsdt to the developers\n");
1272 kfree(model);
1273 return -ENODEV;
1274 }
1275 hotk->methods = &model_conf[hotk->model];
1276 return AE_OK;
1277 }
1278 hotk->methods = &model_conf[hotk->model];
1279 printk(KERN_NOTICE " %s model detected, supported\n", string);
1280
1281 /* Sort of per-model blacklist */
1282 if (strncmp(string, "L2B", 3) == 0)
1283 hotk->methods->lcd_status = NULL;
1284 /* L2B is similar enough to L3C to use its settings, with this only
1285 exception */
1286 else if (strncmp(string, "A3G", 3) == 0)
1287 hotk->methods->lcd_status = "\\BLFG";
1288 /* A3G is like M6R */
1289 else if (strncmp(string, "S5N", 3) == 0 ||
1290 strncmp(string, "M5N", 3) == 0 ||
1291 strncmp(string, "W3N", 3) == 0)
1292 hotk->methods->mt_mled = NULL;
1293 /* S5N, M5N and W3N have no MLED */
1294 else if (strncmp(string, "L5D", 3) == 0)
1295 hotk->methods->mt_wled = NULL;
1296 /* L5D's WLED is not controlled by ACPI */
1297 else if (strncmp(string, "M2N", 3) == 0 ||
1298 strncmp(string, "W3V", 3) == 0 ||
1299 strncmp(string, "S1N", 3) == 0)
1300 hotk->methods->mt_wled = "WLED";
1301 /* M2N, S1N and W3V have a usable WLED */
1302 else if (asus_info) {
1303 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1304 hotk->methods->mled_status = NULL;
1305 /* S1300A reports L84F, but L1400B too, account for that */
1306 }
1307
1308 kfree(model);
1309
1310 return AE_OK;
1311 }
1312
1313 static int asus_hotk_check(void)
1314 {
1315 int result = 0;
1316
1317 result = acpi_bus_get_status(hotk->device);
1318 if (result)
1319 return result;
1320
1321 if (hotk->device->status.present) {
1322 result = asus_hotk_get_info();
1323 } else {
1324 printk(KERN_ERR " Hotkey device not present, aborting\n");
1325 return -EINVAL;
1326 }
1327
1328 return result;
1329 }
1330
1331 static int asus_hotk_found;
1332
1333 static int asus_hotk_add(struct acpi_device *device)
1334 {
1335 acpi_status status = AE_OK;
1336 int result;
1337
1338 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1339 ASUS_ACPI_VERSION);
1340
1341 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1342 if (!hotk)
1343 return -ENOMEM;
1344
1345 hotk->handle = device->handle;
1346 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1347 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1348 device->driver_data = hotk;
1349 hotk->device = device;
1350
1351 result = asus_hotk_check();
1352 if (result)
1353 goto end;
1354
1355 result = asus_hotk_add_fs(device);
1356 if (result)
1357 goto end;
1358
1359 /* For laptops without GPLV: init the hotk->brightness value */
1360 if ((!hotk->methods->brightness_get)
1361 && (!hotk->methods->brightness_status)
1362 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1363 status =
1364 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1365 NULL, NULL);
1366 if (ACPI_FAILURE(status))
1367 printk(KERN_WARNING " Error changing brightness\n");
1368 else {
1369 status =
1370 acpi_evaluate_object(NULL,
1371 hotk->methods->brightness_up,
1372 NULL, NULL);
1373 if (ACPI_FAILURE(status))
1374 printk(KERN_WARNING " Strange, error changing"
1375 " brightness\n");
1376 }
1377 }
1378
1379 asus_hotk_found = 1;
1380
1381 /* LED display is off by default */
1382 hotk->ledd_status = 0xFFF;
1383
1384 end:
1385 if (result)
1386 kfree(hotk);
1387
1388 return result;
1389 }
1390
1391 static int asus_hotk_remove(struct acpi_device *device, int type)
1392 {
1393 asus_hotk_remove_fs(device);
1394
1395 kfree(hotk);
1396
1397 return 0;
1398 }
1399
1400 static struct backlight_ops asus_backlight_data = {
1401 .get_brightness = read_brightness,
1402 .update_status = set_brightness_status,
1403 };
1404
1405 static void asus_acpi_exit(void)
1406 {
1407 if (asus_backlight_device)
1408 backlight_device_unregister(asus_backlight_device);
1409
1410 acpi_bus_unregister_driver(&asus_hotk_driver);
1411 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1412
1413 return;
1414 }
1415
1416 static int __init asus_acpi_init(void)
1417 {
1418 int result;
1419
1420 result = acpi_bus_register_driver(&asus_hotk_driver);
1421 if (result < 0)
1422 return result;
1423
1424 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1425 if (!asus_proc_dir) {
1426 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1427 acpi_bus_unregister_driver(&asus_hotk_driver);
1428 return -ENODEV;
1429 }
1430
1431 /*
1432 * This is a bit of a kludge. We only want this module loaded
1433 * for ASUS systems, but there's currently no way to probe the
1434 * ACPI namespace for ASUS HIDs. So we just return failure if
1435 * we didn't find one, which will cause the module to be
1436 * unloaded.
1437 */
1438 if (!asus_hotk_found) {
1439 acpi_bus_unregister_driver(&asus_hotk_driver);
1440 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1441 return -ENODEV;
1442 }
1443
1444 asus_backlight_device = backlight_device_register("asus", NULL, NULL,
1445 &asus_backlight_data);
1446 if (IS_ERR(asus_backlight_device)) {
1447 printk(KERN_ERR "Could not register asus backlight device\n");
1448 asus_backlight_device = NULL;
1449 asus_acpi_exit();
1450 return -ENODEV;
1451 }
1452 asus_backlight_device->props.max_brightness = 15;
1453
1454 return 0;
1455 }
1456
1457 module_init(asus_acpi_init);
1458 module_exit(asus_acpi_exit);
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