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proc 2/2: remove struct proc_dir_entry::owner
[linux-2.6/mini2440.git] / drivers / platform / x86 / asus_acpi.c
blobba1f7497e4b9a99f5be8d9d9d406ff1f6b170dbd
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 const struct acpi_device_id asus_device_ids[] = {
459 {"ATK0100", 0},
460 {"", 0},
461 };
462 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
463
464 static struct acpi_driver asus_hotk_driver = {
465 .name = "asus_acpi",
466 .class = ACPI_HOTK_CLASS,
467 .ids = asus_device_ids,
468 .ops = {
469 .add = asus_hotk_add,
470 .remove = asus_hotk_remove,
471 },
472 };
473
474 /*
475 * This function evaluates an ACPI method, given an int as parameter, the
476 * method is searched within the scope of the handle, can be NULL. The output
477 * of the method is written is output, which can also be NULL
478 *
479 * returns 1 if write is successful, 0 else.
480 */
481 static int write_acpi_int(acpi_handle handle, const char *method, int val,
482 struct acpi_buffer *output)
483 {
484 struct acpi_object_list params; /* list of input parameters (int) */
485 union acpi_object in_obj; /* the only param we use */
486 acpi_status status;
487
488 params.count = 1;
489 params.pointer = &in_obj;
490 in_obj.type = ACPI_TYPE_INTEGER;
491 in_obj.integer.value = val;
492
493 status = acpi_evaluate_object(handle, (char *)method, &params, output);
494 return (status == AE_OK);
495 }
496
497 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
498 {
499 struct acpi_buffer output;
500 union acpi_object out_obj;
501 acpi_status status;
502
503 output.length = sizeof(out_obj);
504 output.pointer = &out_obj;
505
506 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
507 *val = out_obj.integer.value;
508 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
509 }
510
511 /*
512 * We write our info in page, we begin at offset off and cannot write more
513 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
514 * number of bytes written in page
515 */
516 static int
517 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
518 void *data)
519 {
520 int len = 0;
521 int temp;
522 char buf[16]; /* enough for all info */
523 /*
524 * We use the easy way, we don't care of off and count,
525 * so we don't set eof to 1
526 */
527
528 len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
529 len += sprintf(page + len, "Model reference : %s\n",
530 hotk->methods->name);
531 /*
532 * The SFUN method probably allows the original driver to get the list
533 * of features supported by a given model. For now, 0x0100 or 0x0800
534 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
535 * The significance of others is yet to be found.
536 */
537 if (read_acpi_int(hotk->handle, "SFUN", &temp))
538 len +=
539 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
540 /*
541 * Another value for userspace: the ASYM method returns 0x02 for
542 * battery low and 0x04 for battery critical, its readings tend to be
543 * more accurate than those provided by _BST.
544 * Note: since not all the laptops provide this method, errors are
545 * silently ignored.
546 */
547 if (read_acpi_int(hotk->handle, "ASYM", &temp))
548 len +=
549 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
550 if (asus_info) {
551 snprintf(buf, 16, "%d", asus_info->length);
552 len += sprintf(page + len, "DSDT length : %s\n", buf);
553 snprintf(buf, 16, "%d", asus_info->checksum);
554 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
555 snprintf(buf, 16, "%d", asus_info->revision);
556 len += sprintf(page + len, "DSDT revision : %s\n", buf);
557 snprintf(buf, 7, "%s", asus_info->oem_id);
558 len += sprintf(page + len, "OEM id : %s\n", buf);
559 snprintf(buf, 9, "%s", asus_info->oem_table_id);
560 len += sprintf(page + len, "OEM table id : %s\n", buf);
561 snprintf(buf, 16, "%x", asus_info->oem_revision);
562 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
563 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
564 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
565 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
566 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
567 }
568
569 return len;
570 }
571
572 /*
573 * /proc handlers
574 * We write our info in page, we begin at offset off and cannot write more
575 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
576 * number of bytes written in page
577 */
578
579 /* Generic LED functions */
580 static int read_led(const char *ledname, int ledmask)
581 {
582 if (ledname) {
583 int led_status;
584
585 if (read_acpi_int(NULL, ledname, &led_status))
586 return led_status;
587 else
588 printk(KERN_WARNING "Asus ACPI: Error reading LED "
589 "status\n");
590 }
591 return (hotk->status & ledmask) ? 1 : 0;
592 }
593
594 static int parse_arg(const char __user *buf, unsigned long count, int *val)
595 {
596 char s[32];
597 if (!count)
598 return 0;
599 if (count > 31)
600 return -EINVAL;
601 if (copy_from_user(s, buf, count))
602 return -EFAULT;
603 s[count] = 0;
604 if (sscanf(s, "%i", val) != 1)
605 return -EINVAL;
606 return count;
607 }
608
609 /* FIXME: kill extraneous args so it can be called independently */
610 static int
611 write_led(const char __user *buffer, unsigned long count,
612 char *ledname, int ledmask, int invert)
613 {
614 int rv, value;
615 int led_out = 0;
616
617 rv = parse_arg(buffer, count, &value);
618 if (rv > 0)
619 led_out = value ? 1 : 0;
620
621 hotk->status =
622 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
623
624 if (invert) /* invert target value */
625 led_out = !led_out;
626
627 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
628 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
629 ledname);
630
631 return rv;
632 }
633
634 /*
635 * Proc handlers for MLED
636 */
637 static int
638 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
639 void *data)
640 {
641 return sprintf(page, "%d\n",
642 read_led(hotk->methods->mled_status, MLED_ON));
643 }
644
645 static int
646 proc_write_mled(struct file *file, const char __user *buffer,
647 unsigned long count, void *data)
648 {
649 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
650 }
651
652 /*
653 * Proc handlers for LED display
654 */
655 static int
656 proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
657 void *data)
658 {
659 return sprintf(page, "0x%08x\n", hotk->ledd_status);
660 }
661
662 static int
663 proc_write_ledd(struct file *file, const char __user *buffer,
664 unsigned long count, void *data)
665 {
666 int rv, value;
667
668 rv = parse_arg(buffer, count, &value);
669 if (rv > 0) {
670 if (!write_acpi_int
671 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
672 printk(KERN_WARNING
673 "Asus ACPI: LED display write failed\n");
674 else
675 hotk->ledd_status = (u32) value;
676 }
677 return rv;
678 }
679
680 /*
681 * Proc handlers for WLED
682 */
683 static int
684 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
685 void *data)
686 {
687 return sprintf(page, "%d\n",
688 read_led(hotk->methods->wled_status, WLED_ON));
689 }
690
691 static int
692 proc_write_wled(struct file *file, const char __user *buffer,
693 unsigned long count, void *data)
694 {
695 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
696 }
697
698 /*
699 * Proc handlers for Bluetooth
700 */
701 static int
702 proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
703 void *data)
704 {
705 return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
706 }
707
708 static int
709 proc_write_bluetooth(struct file *file, const char __user *buffer,
710 unsigned long count, void *data)
711 {
712 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
713 presence and its LED */
714 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
715 }
716
717 /*
718 * Proc handlers for TLED
719 */
720 static int
721 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
722 void *data)
723 {
724 return sprintf(page, "%d\n",
725 read_led(hotk->methods->tled_status, TLED_ON));
726 }
727
728 static int
729 proc_write_tled(struct file *file, const char __user *buffer,
730 unsigned long count, void *data)
731 {
732 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
733 }
734
735 static int get_lcd_state(void)
736 {
737 int lcd = 0;
738
739 if (hotk->model == L3H) {
740 /* L3H and the like have to be handled differently */
741 acpi_status status = 0;
742 struct acpi_object_list input;
743 union acpi_object mt_params[2];
744 struct acpi_buffer output;
745 union acpi_object out_obj;
746
747 input.count = 2;
748 input.pointer = mt_params;
749 /* Note: the following values are partly guessed up, but
750 otherwise they seem to work */
751 mt_params[0].type = ACPI_TYPE_INTEGER;
752 mt_params[0].integer.value = 0x02;
753 mt_params[1].type = ACPI_TYPE_INTEGER;
754 mt_params[1].integer.value = 0x02;
755
756 output.length = sizeof(out_obj);
757 output.pointer = &out_obj;
758
759 status =
760 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
761 &input, &output);
762 if (status != AE_OK)
763 return -1;
764 if (out_obj.type == ACPI_TYPE_INTEGER)
765 /* That's what the AML code does */
766 lcd = out_obj.integer.value >> 8;
767 } else if (hotk->model == F3Sa) {
768 unsigned long long tmp;
769 union acpi_object param;
770 struct acpi_object_list input;
771 acpi_status status;
772
773 /* Read pin 11 */
774 param.type = ACPI_TYPE_INTEGER;
775 param.integer.value = 0x11;
776 input.count = 1;
777 input.pointer = &param;
778
779 status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
780 &input, &tmp);
781 if (status != AE_OK)
782 return -1;
783
784 lcd = tmp;
785 } else {
786 /* We don't have to check anything if we are here */
787 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
788 printk(KERN_WARNING
789 "Asus ACPI: Error reading LCD status\n");
790
791 if (hotk->model == L2D)
792 lcd = ~lcd;
793 }
794
795 return (lcd & 1);
796 }
797
798 static int set_lcd_state(int value)
799 {
800 int lcd = 0;
801 acpi_status status = 0;
802
803 lcd = value ? 1 : 0;
804 if (lcd != get_lcd_state()) {
805 /* switch */
806 if (hotk->model != L3H) {
807 status =
808 acpi_evaluate_object(NULL,
809 hotk->methods->mt_lcd_switch,
810 NULL, NULL);
811 } else {
812 /* L3H and the like must be handled differently */
813 if (!write_acpi_int
814 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
815 NULL))
816 status = AE_ERROR;
817 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
818 the exact behaviour is simulated here */
819 }
820 if (ACPI_FAILURE(status))
821 printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
822 }
823 return 0;
824
825 }
826
827 static int
828 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
829 void *data)
830 {
831 return sprintf(page, "%d\n", get_lcd_state());
832 }
833
834 static int
835 proc_write_lcd(struct file *file, const char __user *buffer,
836 unsigned long count, void *data)
837 {
838 int rv, value;
839
840 rv = parse_arg(buffer, count, &value);
841 if (rv > 0)
842 set_lcd_state(value);
843 return rv;
844 }
845
846 static int read_brightness(struct backlight_device *bd)
847 {
848 int value;
849
850 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
851 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
852 &value))
853 printk(KERN_WARNING
854 "Asus ACPI: Error reading brightness\n");
855 } else if (hotk->methods->brightness_status) { /* For D1 for example */
856 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
857 &value))
858 printk(KERN_WARNING
859 "Asus ACPI: Error reading brightness\n");
860 } else /* No GPLV method */
861 value = hotk->brightness;
862 return value;
863 }
864
865 /*
866 * Change the brightness level
867 */
868 static int set_brightness(int value)
869 {
870 acpi_status status = 0;
871 int ret = 0;
872
873 /* SPLV laptop */
874 if (hotk->methods->brightness_set) {
875 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
876 value, NULL))
877 printk(KERN_WARNING
878 "Asus ACPI: Error changing brightness\n");
879 ret = -EIO;
880 goto out;
881 }
882
883 /* No SPLV method if we are here, act as appropriate */
884 value -= read_brightness(NULL);
885 while (value != 0) {
886 status = acpi_evaluate_object(NULL, (value > 0) ?
887 hotk->methods->brightness_up :
888 hotk->methods->brightness_down,
889 NULL, NULL);
890 (value > 0) ? value-- : value++;
891 if (ACPI_FAILURE(status))
892 printk(KERN_WARNING
893 "Asus ACPI: Error changing brightness\n");
894 ret = -EIO;
895 }
896 out:
897 return ret;
898 }
899
900 static int set_brightness_status(struct backlight_device *bd)
901 {
902 return set_brightness(bd->props.brightness);
903 }
904
905 static int
906 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
907 void *data)
908 {
909 return sprintf(page, "%d\n", read_brightness(NULL));
910 }
911
912 static int
913 proc_write_brn(struct file *file, const char __user *buffer,
914 unsigned long count, void *data)
915 {
916 int rv, value;
917
918 rv = parse_arg(buffer, count, &value);
919 if (rv > 0) {
920 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
921 /* 0 <= value <= 15 */
922 set_brightness(value);
923 }
924 return rv;
925 }
926
927 static void set_display(int value)
928 {
929 /* no sanity check needed for now */
930 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
931 value, NULL))
932 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
933 return;
934 }
935
936 /*
937 * Now, *this* one could be more user-friendly, but so far, no-one has
938 * complained. The significance of bits is the same as in proc_write_disp()
939 */
940 static int
941 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
942 void *data)
943 {
944 int value = 0;
945
946 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
947 printk(KERN_WARNING
948 "Asus ACPI: Error reading display status\n");
949 value &= 0x07; /* needed for some models, shouldn't hurt others */
950 return sprintf(page, "%d\n", value);
951 }
952
953 /*
954 * Experimental support for display switching. As of now: 1 should activate
955 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
956 * (bitwise) of these will suffice. I never actually tested 3 displays hooked
957 * up simultaneously, so be warned. See the acpi4asus README for more info.
958 */
959 static int
960 proc_write_disp(struct file *file, const char __user *buffer,
961 unsigned long count, void *data)
962 {
963 int rv, value;
964
965 rv = parse_arg(buffer, count, &value);
966 if (rv > 0)
967 set_display(value);
968 return rv;
969 }
970
971 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
972 int *eof, void *data);
973 typedef int (proc_writefunc) (struct file *file, const char __user *buffer,
974 unsigned long count, void *data);
975
976 static int
977 asus_proc_add(char *name, proc_writefunc *writefunc,
978 proc_readfunc *readfunc, mode_t mode,
979 struct acpi_device *device)
980 {
981 struct proc_dir_entry *proc =
982 create_proc_entry(name, mode, acpi_device_dir(device));
983 if (!proc) {
984 printk(KERN_WARNING " Unable to create %s fs entry\n", name);
985 return -1;
986 }
987 proc->write_proc = writefunc;
988 proc->read_proc = readfunc;
989 proc->data = acpi_driver_data(device);
990 proc->uid = asus_uid;
991 proc->gid = asus_gid;
992 return 0;
993 }
994
995 static int asus_hotk_add_fs(struct acpi_device *device)
996 {
997 struct proc_dir_entry *proc;
998 mode_t mode;
999
1000 /*
1001 * If parameter uid or gid is not changed, keep the default setting for
1002 * our proc entries (-rw-rw-rw-) else, it means we care about security,
1003 * and then set to -rw-rw----
1004 */
1005
1006 if ((asus_uid == 0) && (asus_gid == 0)) {
1007 mode = S_IFREG | S_IRUGO | S_IWUGO;
1008 } else {
1009 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
1010 printk(KERN_WARNING " asus_uid and asus_gid parameters are "
1011 "deprecated, use chown and chmod instead!\n");
1012 }
1013
1014 acpi_device_dir(device) = asus_proc_dir;
1015 if (!acpi_device_dir(device))
1016 return -ENODEV;
1017
1018 proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
1019 if (proc) {
1020 proc->read_proc = proc_read_info;
1021 proc->data = acpi_driver_data(device);
1022 proc->uid = asus_uid;
1023 proc->gid = asus_gid;
1024 } else {
1025 printk(KERN_WARNING " Unable to create " PROC_INFO
1026 " fs entry\n");
1027 }
1028
1029 if (hotk->methods->mt_wled) {
1030 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
1031 mode, device);
1032 }
1033
1034 if (hotk->methods->mt_ledd) {
1035 asus_proc_add(PROC_LEDD, &proc_write_ledd, &proc_read_ledd,
1036 mode, device);
1037 }
1038
1039 if (hotk->methods->mt_mled) {
1040 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
1041 mode, device);
1042 }
1043
1044 if (hotk->methods->mt_tled) {
1045 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
1046 mode, device);
1047 }
1048
1049 if (hotk->methods->mt_bt_switch) {
1050 asus_proc_add(PROC_BT, &proc_write_bluetooth,
1051 &proc_read_bluetooth, mode, device);
1052 }
1053
1054 /*
1055 * We need both read node and write method as LCD switch is also
1056 * accessible from the keyboard
1057 */
1058 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
1059 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
1060 device);
1061 }
1062
1063 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
1064 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
1065 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
1066 device);
1067 }
1068
1069 if (hotk->methods->display_set) {
1070 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
1071 mode, device);
1072 }
1073
1074 return 0;
1075 }
1076
1077 static int asus_hotk_remove_fs(struct acpi_device *device)
1078 {
1079 if (acpi_device_dir(device)) {
1080 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1081 if (hotk->methods->mt_wled)
1082 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1083 if (hotk->methods->mt_mled)
1084 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1085 if (hotk->methods->mt_tled)
1086 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1087 if (hotk->methods->mt_ledd)
1088 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1089 if (hotk->methods->mt_bt_switch)
1090 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1091 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1092 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1093 if ((hotk->methods->brightness_up
1094 && hotk->methods->brightness_down)
1095 || (hotk->methods->brightness_get
1096 && hotk->methods->brightness_set))
1097 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1098 if (hotk->methods->display_set)
1099 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1100 }
1101 return 0;
1102 }
1103
1104 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
1105 {
1106 /* TODO Find a better way to handle events count. */
1107 if (!hotk)
1108 return;
1109
1110 if ((event & ~((u32) BR_UP)) < 16)
1111 hotk->brightness = (event & ~((u32) BR_UP));
1112 else if ((event & ~((u32) BR_DOWN)) < 16)
1113 hotk->brightness = (event & ~((u32) BR_DOWN));
1114
1115 acpi_bus_generate_proc_event(hotk->device, event,
1116 hotk->event_count[event % 128]++);
1117
1118 return;
1119 }
1120
1121 /*
1122 * Match the model string to the list of supported models. Return END_MODEL if
1123 * no match or model is NULL.
1124 */
1125 static int asus_model_match(char *model)
1126 {
1127 if (model == NULL)
1128 return END_MODEL;
1129
1130 if (strncmp(model, "L3D", 3) == 0)
1131 return L3D;
1132 else if (strncmp(model, "L2E", 3) == 0 ||
1133 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1134 return L3H;
1135 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1136 return L3C;
1137 else if (strncmp(model, "L8L", 3) == 0)
1138 return L8L;
1139 else if (strncmp(model, "L4R", 3) == 0)
1140 return L4R;
1141 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1142 return M6N;
1143 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1144 return M6R;
1145 else if (strncmp(model, "M2N", 3) == 0 ||
1146 strncmp(model, "M3N", 3) == 0 ||
1147 strncmp(model, "M5N", 3) == 0 ||
1148 strncmp(model, "M6N", 3) == 0 ||
1149 strncmp(model, "S1N", 3) == 0 ||
1150 strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0)
1151 return xxN;
1152 else if (strncmp(model, "M1", 2) == 0)
1153 return M1A;
1154 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1155 return M2E;
1156 else if (strncmp(model, "L2", 2) == 0)
1157 return L2D;
1158 else if (strncmp(model, "L8", 2) == 0)
1159 return S1x;
1160 else if (strncmp(model, "D1", 2) == 0)
1161 return D1x;
1162 else if (strncmp(model, "A1", 2) == 0)
1163 return A1x;
1164 else if (strncmp(model, "A2", 2) == 0)
1165 return A2x;
1166 else if (strncmp(model, "J1", 2) == 0)
1167 return S2x;
1168 else if (strncmp(model, "L5", 2) == 0)
1169 return L5x;
1170 else if (strncmp(model, "A4G", 3) == 0)
1171 return A4G;
1172 else if (strncmp(model, "W1N", 3) == 0)
1173 return W1N;
1174 else if (strncmp(model, "W3V", 3) == 0)
1175 return W3V;
1176 else if (strncmp(model, "W5A", 3) == 0)
1177 return W5A;
1178 else if (strncmp(model, "R1F", 3) == 0)
1179 return R1F;
1180 else if (strncmp(model, "A4S", 3) == 0)
1181 return A4S;
1182 else if (strncmp(model, "F3Sa", 4) == 0)
1183 return F3Sa;
1184 else
1185 return END_MODEL;
1186 }
1187
1188 /*
1189 * This function is used to initialize the hotk with right values. In this
1190 * method, we can make all the detection we want, and modify the hotk struct
1191 */
1192 static int asus_hotk_get_info(void)
1193 {
1194 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1195 union acpi_object *model = NULL;
1196 int bsts_result;
1197 char *string = NULL;
1198 acpi_status status;
1199
1200 /*
1201 * Get DSDT headers early enough to allow for differentiating between
1202 * models, but late enough to allow acpi_bus_register_driver() to fail
1203 * before doing anything ACPI-specific. Should we encounter a machine,
1204 * which needs special handling (i.e. its hotkey device has a different
1205 * HID), this bit will be moved. A global variable asus_info contains
1206 * the DSDT header.
1207 */
1208 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
1209 if (ACPI_FAILURE(status))
1210 printk(KERN_WARNING " Couldn't get the DSDT table header\n");
1211
1212 /* We have to write 0 on init this far for all ASUS models */
1213 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1214 printk(KERN_ERR " Hotkey initialization failed\n");
1215 return -ENODEV;
1216 }
1217
1218 /* This needs to be called for some laptops to init properly */
1219 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1220 printk(KERN_WARNING " Error calling BSTS\n");
1221 else if (bsts_result)
1222 printk(KERN_NOTICE " BSTS called, 0x%02x returned\n",
1223 bsts_result);
1224
1225 /*
1226 * Try to match the object returned by INIT to the specific model.
1227 * Handle every possible object (or the lack of thereof) the DSDT
1228 * writers might throw at us. When in trouble, we pass NULL to
1229 * asus_model_match() and try something completely different.
1230 */
1231 if (buffer.pointer) {
1232 model = buffer.pointer;
1233 switch (model->type) {
1234 case ACPI_TYPE_STRING:
1235 string = model->string.pointer;
1236 break;
1237 case ACPI_TYPE_BUFFER:
1238 string = model->buffer.pointer;
1239 break;
1240 default:
1241 kfree(model);
1242 model = NULL;
1243 break;
1244 }
1245 }
1246 hotk->model = asus_model_match(string);
1247 if (hotk->model == END_MODEL) { /* match failed */
1248 if (asus_info &&
1249 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1250 hotk->model = P30;
1251 printk(KERN_NOTICE
1252 " Samsung P30 detected, supported\n");
1253 } else {
1254 hotk->model = M2E;
1255 printk(KERN_NOTICE " unsupported model %s, trying "
1256 "default values\n", string);
1257 printk(KERN_NOTICE
1258 " send /proc/acpi/dsdt to the developers\n");
1259 kfree(model);
1260 return -ENODEV;
1261 }
1262 hotk->methods = &model_conf[hotk->model];
1263 return AE_OK;
1264 }
1265 hotk->methods = &model_conf[hotk->model];
1266 printk(KERN_NOTICE " %s model detected, supported\n", string);
1267
1268 /* Sort of per-model blacklist */
1269 if (strncmp(string, "L2B", 3) == 0)
1270 hotk->methods->lcd_status = NULL;
1271 /* L2B is similar enough to L3C to use its settings, with this only
1272 exception */
1273 else if (strncmp(string, "A3G", 3) == 0)
1274 hotk->methods->lcd_status = "\\BLFG";
1275 /* A3G is like M6R */
1276 else if (strncmp(string, "S5N", 3) == 0 ||
1277 strncmp(string, "M5N", 3) == 0 ||
1278 strncmp(string, "W3N", 3) == 0)
1279 hotk->methods->mt_mled = NULL;
1280 /* S5N, M5N and W3N have no MLED */
1281 else if (strncmp(string, "L5D", 3) == 0)
1282 hotk->methods->mt_wled = NULL;
1283 /* L5D's WLED is not controlled by ACPI */
1284 else if (strncmp(string, "M2N", 3) == 0 ||
1285 strncmp(string, "W3V", 3) == 0 ||
1286 strncmp(string, "S1N", 3) == 0)
1287 hotk->methods->mt_wled = "WLED";
1288 /* M2N, S1N and W3V have a usable WLED */
1289 else if (asus_info) {
1290 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1291 hotk->methods->mled_status = NULL;
1292 /* S1300A reports L84F, but L1400B too, account for that */
1293 }
1294
1295 kfree(model);
1296
1297 return AE_OK;
1298 }
1299
1300 static int asus_hotk_check(void)
1301 {
1302 int result = 0;
1303
1304 result = acpi_bus_get_status(hotk->device);
1305 if (result)
1306 return result;
1307
1308 if (hotk->device->status.present) {
1309 result = asus_hotk_get_info();
1310 } else {
1311 printk(KERN_ERR " Hotkey device not present, aborting\n");
1312 return -EINVAL;
1313 }
1314
1315 return result;
1316 }
1317
1318 static int asus_hotk_found;
1319
1320 static int asus_hotk_add(struct acpi_device *device)
1321 {
1322 acpi_status status = AE_OK;
1323 int result;
1324
1325 if (!device)
1326 return -EINVAL;
1327
1328 printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1329 ASUS_ACPI_VERSION);
1330
1331 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1332 if (!hotk)
1333 return -ENOMEM;
1334
1335 hotk->handle = device->handle;
1336 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1337 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1338 device->driver_data = hotk;
1339 hotk->device = device;
1340
1341 result = asus_hotk_check();
1342 if (result)
1343 goto end;
1344
1345 result = asus_hotk_add_fs(device);
1346 if (result)
1347 goto end;
1348
1349 /*
1350 * We install the handler, it will receive the hotk in parameter, so, we
1351 * could add other data to the hotk struct
1352 */
1353 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1354 asus_hotk_notify, hotk);
1355 if (ACPI_FAILURE(status))
1356 printk(KERN_ERR " Error installing notify handler\n");
1357
1358 /* For laptops without GPLV: init the hotk->brightness value */
1359 if ((!hotk->methods->brightness_get)
1360 && (!hotk->methods->brightness_status)
1361 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1362 status =
1363 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1364 NULL, NULL);
1365 if (ACPI_FAILURE(status))
1366 printk(KERN_WARNING " Error changing brightness\n");
1367 else {
1368 status =
1369 acpi_evaluate_object(NULL,
1370 hotk->methods->brightness_up,
1371 NULL, NULL);
1372 if (ACPI_FAILURE(status))
1373 printk(KERN_WARNING " Strange, error changing"
1374 " brightness\n");
1375 }
1376 }
1377
1378 asus_hotk_found = 1;
1379
1380 /* LED display is off by default */
1381 hotk->ledd_status = 0xFFF;
1382
1383 end:
1384 if (result)
1385 kfree(hotk);
1386
1387 return result;
1388 }
1389
1390 static int asus_hotk_remove(struct acpi_device *device, int type)
1391 {
1392 acpi_status status = 0;
1393
1394 if (!device || !acpi_driver_data(device))
1395 return -EINVAL;
1396
1397 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1398 asus_hotk_notify);
1399 if (ACPI_FAILURE(status))
1400 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1401
1402 asus_hotk_remove_fs(device);
1403
1404 kfree(hotk);
1405
1406 return 0;
1407 }
1408
1409 static struct backlight_ops asus_backlight_data = {
1410 .get_brightness = read_brightness,
1411 .update_status = set_brightness_status,
1412 };
1413
1414 static void asus_acpi_exit(void)
1415 {
1416 if (asus_backlight_device)
1417 backlight_device_unregister(asus_backlight_device);
1418
1419 acpi_bus_unregister_driver(&asus_hotk_driver);
1420 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1421
1422 return;
1423 }
1424
1425 static int __init asus_acpi_init(void)
1426 {
1427 int result;
1428
1429 if (acpi_disabled)
1430 return -ENODEV;
1431
1432 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1433 if (!asus_proc_dir) {
1434 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1435 return -ENODEV;
1436 }
1437
1438 result = acpi_bus_register_driver(&asus_hotk_driver);
1439 if (result < 0) {
1440 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1441 return result;
1442 }
1443
1444 /*
1445 * This is a bit of a kludge. We only want this module loaded
1446 * for ASUS systems, but there's currently no way to probe the
1447 * ACPI namespace for ASUS HIDs. So we just return failure if
1448 * we didn't find one, which will cause the module to be
1449 * unloaded.
1450 */
1451 if (!asus_hotk_found) {
1452 acpi_bus_unregister_driver(&asus_hotk_driver);
1453 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1454 return -ENODEV;
1455 }
1456
1457 asus_backlight_device = backlight_device_register("asus", NULL, NULL,
1458 &asus_backlight_data);
1459 if (IS_ERR(asus_backlight_device)) {
1460 printk(KERN_ERR "Could not register asus backlight device\n");
1461 asus_backlight_device = NULL;
1462 asus_acpi_exit();
1463 return -ENODEV;
1464 }
1465 asus_backlight_device->props.max_brightness = 15;
1466
1467 return 0;
1468 }
1469
1470 module_init(asus_acpi_init);
1471 module_exit(asus_acpi_exit);
Support for the Chinese Samsung S3C2440 based development boards