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Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6
[linux-btrfs-devel.git] / drivers / platform / x86 / asus_acpi.c
blobd9312b3073e5f31f87a36530f07afac51b7264ca
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
34
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/slab.h>
38 #include <linux/init.h>
39 #include <linux/types.h>
40 #include <linux/proc_fs.h>
41 #include <linux/seq_file.h>
42 #include <linux/backlight.h>
43 #include <acpi/acpi_drivers.h>
44 #include <acpi/acpi_bus.h>
45 #include <asm/uaccess.h>
46
47 #define ASUS_ACPI_VERSION "0.30"
48
49 #define PROC_ASUS "asus" /* The directory */
50 #define PROC_MLED "mled"
51 #define PROC_WLED "wled"
52 #define PROC_TLED "tled"
53 #define PROC_BT "bluetooth"
54 #define PROC_LEDD "ledd"
55 #define PROC_INFO "info"
56 #define PROC_LCD "lcd"
57 #define PROC_BRN "brn"
58 #define PROC_DISP "disp"
59
60 #define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
61 #define ACPI_HOTK_CLASS "hotkey"
62 #define ACPI_HOTK_DEVICE_NAME "Hotkey"
63
64 /*
65 * Some events we use, same for all Asus
66 */
67 #define BR_UP 0x10
68 #define BR_DOWN 0x20
69
70 /*
71 * Flags for hotk status
72 */
73 #define MLED_ON 0x01 /* Mail LED */
74 #define WLED_ON 0x02 /* Wireless LED */
75 #define TLED_ON 0x04 /* Touchpad LED */
76 #define BT_ON 0x08 /* Internal Bluetooth */
77
78 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
79 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
80 MODULE_LICENSE("GPL");
81
82 static uid_t asus_uid;
83 static gid_t asus_gid;
84 module_param(asus_uid, uint, 0);
85 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus");
86 module_param(asus_gid, uint, 0);
87 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
88
89 /* For each model, all features implemented,
90 * those marked with R are relative to HOTK, A for absolute */
91 struct model_data {
92 char *name; /* name of the laptop________________A */
93 char *mt_mled; /* method to handle mled_____________R */
94 char *mled_status; /* node to handle mled reading_______A */
95 char *mt_wled; /* method to handle wled_____________R */
96 char *wled_status; /* node to handle wled reading_______A */
97 char *mt_tled; /* method to handle tled_____________R */
98 char *tled_status; /* node to handle tled reading_______A */
99 char *mt_ledd; /* method to handle LED display______R */
100 char *mt_bt_switch; /* method to switch Bluetooth on/off_R */
101 char *bt_status; /* no model currently supports this__? */
102 char *mt_lcd_switch; /* method to turn LCD on/off_________A */
103 char *lcd_status; /* node to read LCD panel state______A */
104 char *brightness_up; /* method to set brightness up_______A */
105 char *brightness_down; /* method to set brightness down ____A */
106 char *brightness_set; /* method to set absolute brightness_R */
107 char *brightness_get; /* method to get absolute brightness_R */
108 char *brightness_status;/* node to get brightness____________A */
109 char *display_set; /* method to set video output________R */
110 char *display_get; /* method to get video output________R */
111 };
112
113 /*
114 * This is the main structure, we can use it to store anything interesting
115 * about the hotk device
116 */
117 struct asus_hotk {
118 struct acpi_device *device; /* the device we are in */
119 acpi_handle handle; /* the handle of the hotk device */
120 char status; /* status of the hotk, for LEDs */
121 u32 ledd_status; /* status of the LED display */
122 struct model_data *methods; /* methods available on the laptop */
123 u8 brightness; /* brightness level */
124 enum {
125 A1x = 0, /* A1340D, A1300F */
126 A2x, /* A2500H */
127 A4G, /* A4700G */
128 D1x, /* D1 */
129 L2D, /* L2000D */
130 L3C, /* L3800C */
131 L3D, /* L3400D */
132 L3H, /* L3H, L2000E, L5D */
133 L4R, /* L4500R */
134 L5x, /* L5800C */
135 L8L, /* L8400L */
136 M1A, /* M1300A */
137 M2E, /* M2400E, L4400L */
138 M6N, /* M6800N, W3400N */
139 M6R, /* M6700R, A3000G */
140 P30, /* Samsung P30 */
141 S1x, /* S1300A, but also L1400B and M2400A (L84F) */
142 S2x, /* S200 (J1 reported), Victor MP-XP7210 */
143 W1N, /* W1000N */
144 W5A, /* W5A */
145 W3V, /* W3030V */
146 xxN, /* M2400N, M3700N, M5200N, M6800N,
147 S1300N, S5200N*/
148 A4S, /* Z81sp */
149 F3Sa, /* (Centrino) */
150 R1F,
151 END_MODEL
152 } model; /* Models currently supported */
153 u16 event_count[128]; /* Count for each event TODO make this better */
154 };
155
156 /* Here we go */
157 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
158 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
159 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
160 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
161 #define S1x_PREFIX "\\_SB.PCI0.PX40."
162 #define S2x_PREFIX A1x_PREFIX
163 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
164
165 static struct model_data model_conf[END_MODEL] = {
166 /*
167 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
168 * it seems to be a kind of switch, but what for ?
169 */
170
171 {
172 .name = "A1x",
173 .mt_mled = "MLED",
174 .mled_status = "\\MAIL",
175 .mt_lcd_switch = A1x_PREFIX "_Q10",
176 .lcd_status = "\\BKLI",
177 .brightness_up = A1x_PREFIX "_Q0E",
178 .brightness_down = A1x_PREFIX "_Q0F"},
179
180 {
181 .name = "A2x",
182 .mt_mled = "MLED",
183 .mt_wled = "WLED",
184 .wled_status = "\\SG66",
185 .mt_lcd_switch = "\\Q10",
186 .lcd_status = "\\BAOF",
187 .brightness_set = "SPLV",
188 .brightness_get = "GPLV",
189 .display_set = "SDSP",
190 .display_get = "\\INFB"},
191
192 {
193 .name = "A4G",
194 .mt_mled = "MLED",
195 /* WLED present, but not controlled by ACPI */
196 .mt_lcd_switch = xxN_PREFIX "_Q10",
197 .brightness_set = "SPLV",
198 .brightness_get = "GPLV",
199 .display_set = "SDSP",
200 .display_get = "\\ADVG"},
201
202 {
203 .name = "D1x",
204 .mt_mled = "MLED",
205 .mt_lcd_switch = "\\Q0D",
206 .lcd_status = "\\GP11",
207 .brightness_up = "\\Q0C",
208 .brightness_down = "\\Q0B",
209 .brightness_status = "\\BLVL",
210 .display_set = "SDSP",
211 .display_get = "\\INFB"},
212
213 {
214 .name = "L2D",
215 .mt_mled = "MLED",
216 .mled_status = "\\SGP6",
217 .mt_wled = "WLED",
218 .wled_status = "\\RCP3",
219 .mt_lcd_switch = "\\Q10",
220 .lcd_status = "\\SGP0",
221 .brightness_up = "\\Q0E",
222 .brightness_down = "\\Q0F",
223 .display_set = "SDSP",
224 .display_get = "\\INFB"},
225
226 {
227 .name = "L3C",
228 .mt_mled = "MLED",
229 .mt_wled = "WLED",
230 .mt_lcd_switch = L3C_PREFIX "_Q10",
231 .lcd_status = "\\GL32",
232 .brightness_set = "SPLV",
233 .brightness_get = "GPLV",
234 .display_set = "SDSP",
235 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
236
237 {
238 .name = "L3D",
239 .mt_mled = "MLED",
240 .mled_status = "\\MALD",
241 .mt_wled = "WLED",
242 .mt_lcd_switch = "\\Q10",
243 .lcd_status = "\\BKLG",
244 .brightness_set = "SPLV",
245 .brightness_get = "GPLV",
246 .display_set = "SDSP",
247 .display_get = "\\INFB"},
248
249 {
250 .name = "L3H",
251 .mt_mled = "MLED",
252 .mt_wled = "WLED",
253 .mt_lcd_switch = "EHK",
254 .lcd_status = "\\_SB.PCI0.PM.PBC",
255 .brightness_set = "SPLV",
256 .brightness_get = "GPLV",
257 .display_set = "SDSP",
258 .display_get = "\\INFB"},
259
260 {
261 .name = "L4R",
262 .mt_mled = "MLED",
263 .mt_wled = "WLED",
264 .wled_status = "\\_SB.PCI0.SBRG.SG13",
265 .mt_lcd_switch = xxN_PREFIX "_Q10",
266 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
267 .brightness_set = "SPLV",
268 .brightness_get = "GPLV",
269 .display_set = "SDSP",
270 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
271
272 {
273 .name = "L5x",
274 .mt_mled = "MLED",
275 /* WLED present, but not controlled by ACPI */
276 .mt_tled = "TLED",
277 .mt_lcd_switch = "\\Q0D",
278 .lcd_status = "\\BAOF",
279 .brightness_set = "SPLV",
280 .brightness_get = "GPLV",
281 .display_set = "SDSP",
282 .display_get = "\\INFB"},
283
284 {
285 .name = "L8L"
286 /* No features, but at least support the hotkeys */
287 },
288
289 {
290 .name = "M1A",
291 .mt_mled = "MLED",
292 .mt_lcd_switch = M1A_PREFIX "Q10",
293 .lcd_status = "\\PNOF",
294 .brightness_up = M1A_PREFIX "Q0E",
295 .brightness_down = M1A_PREFIX "Q0F",
296 .brightness_status = "\\BRIT",
297 .display_set = "SDSP",
298 .display_get = "\\INFB"},
299
300 {
301 .name = "M2E",
302 .mt_mled = "MLED",
303 .mt_wled = "WLED",
304 .mt_lcd_switch = "\\Q10",
305 .lcd_status = "\\GP06",
306 .brightness_set = "SPLV",
307 .brightness_get = "GPLV",
308 .display_set = "SDSP",
309 .display_get = "\\INFB"},
310
311 {
312 .name = "M6N",
313 .mt_mled = "MLED",
314 .mt_wled = "WLED",
315 .wled_status = "\\_SB.PCI0.SBRG.SG13",
316 .mt_lcd_switch = xxN_PREFIX "_Q10",
317 .lcd_status = "\\_SB.BKLT",
318 .brightness_set = "SPLV",
319 .brightness_get = "GPLV",
320 .display_set = "SDSP",
321 .display_get = "\\SSTE"},
322
323 {
324 .name = "M6R",
325 .mt_mled = "MLED",
326 .mt_wled = "WLED",
327 .mt_lcd_switch = xxN_PREFIX "_Q10",
328 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
329 .brightness_set = "SPLV",
330 .brightness_get = "GPLV",
331 .display_set = "SDSP",
332 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
333
334 {
335 .name = "P30",
336 .mt_wled = "WLED",
337 .mt_lcd_switch = P30_PREFIX "_Q0E",
338 .lcd_status = "\\BKLT",
339 .brightness_up = P30_PREFIX "_Q68",
340 .brightness_down = P30_PREFIX "_Q69",
341 .brightness_get = "GPLV",
342 .display_set = "SDSP",
343 .display_get = "\\DNXT"},
344
345 {
346 .name = "S1x",
347 .mt_mled = "MLED",
348 .mled_status = "\\EMLE",
349 .mt_wled = "WLED",
350 .mt_lcd_switch = S1x_PREFIX "Q10",
351 .lcd_status = "\\PNOF",
352 .brightness_set = "SPLV",
353 .brightness_get = "GPLV"},
354
355 {
356 .name = "S2x",
357 .mt_mled = "MLED",
358 .mled_status = "\\MAIL",
359 .mt_lcd_switch = S2x_PREFIX "_Q10",
360 .lcd_status = "\\BKLI",
361 .brightness_up = S2x_PREFIX "_Q0B",
362 .brightness_down = S2x_PREFIX "_Q0A"},
363
364 {
365 .name = "W1N",
366 .mt_mled = "MLED",
367 .mt_wled = "WLED",
368 .mt_ledd = "SLCM",
369 .mt_lcd_switch = xxN_PREFIX "_Q10",
370 .lcd_status = "\\BKLT",
371 .brightness_set = "SPLV",
372 .brightness_get = "GPLV",
373 .display_set = "SDSP",
374 .display_get = "\\ADVG"},
375
376 {
377 .name = "W5A",
378 .mt_bt_switch = "BLED",
379 .mt_wled = "WLED",
380 .mt_lcd_switch = xxN_PREFIX "_Q10",
381 .brightness_set = "SPLV",
382 .brightness_get = "GPLV",
383 .display_set = "SDSP",
384 .display_get = "\\ADVG"},
385
386 {
387 .name = "W3V",
388 .mt_mled = "MLED",
389 .mt_wled = "WLED",
390 .mt_lcd_switch = xxN_PREFIX "_Q10",
391 .lcd_status = "\\BKLT",
392 .brightness_set = "SPLV",
393 .brightness_get = "GPLV",
394 .display_set = "SDSP",
395 .display_get = "\\INFB"},
396
397 {
398 .name = "xxN",
399 .mt_mled = "MLED",
400 /* WLED present, but not controlled by ACPI */
401 .mt_lcd_switch = xxN_PREFIX "_Q10",
402 .lcd_status = "\\BKLT",
403 .brightness_set = "SPLV",
404 .brightness_get = "GPLV",
405 .display_set = "SDSP",
406 .display_get = "\\ADVG"},
407
408 {
409 .name = "A4S",
410 .brightness_set = "SPLV",
411 .brightness_get = "GPLV",
412 .mt_bt_switch = "BLED",
413 .mt_wled = "WLED"
414 },
415
416 {
417 .name = "F3Sa",
418 .mt_bt_switch = "BLED",
419 .mt_wled = "WLED",
420 .mt_mled = "MLED",
421 .brightness_get = "GPLV",
422 .brightness_set = "SPLV",
423 .mt_lcd_switch = "\\_SB.PCI0.SBRG.EC0._Q10",
424 .lcd_status = "\\_SB.PCI0.SBRG.EC0.RPIN",
425 .display_get = "\\ADVG",
426 .display_set = "SDSP",
427 },
428 {
429 .name = "R1F",
430 .mt_bt_switch = "BLED",
431 .mt_mled = "MLED",
432 .mt_wled = "WLED",
433 .mt_lcd_switch = "\\Q10",
434 .lcd_status = "\\GP06",
435 .brightness_set = "SPLV",
436 .brightness_get = "GPLV",
437 .display_set = "SDSP",
438 .display_get = "\\INFB"
439 }
440 };
441
442 /* procdir we use */
443 static struct proc_dir_entry *asus_proc_dir;
444
445 static struct backlight_device *asus_backlight_device;
446
447 /*
448 * This header is made available to allow proper configuration given model,
449 * revision number , ... this info cannot go in struct asus_hotk because it is
450 * available before the hotk
451 */
452 static struct acpi_table_header *asus_info;
453
454 /* The actual device the driver binds to */
455 static struct asus_hotk *hotk;
456
457 /*
458 * The hotkey driver and autoloading declaration
459 */
460 static int asus_hotk_add(struct acpi_device *device);
461 static int asus_hotk_remove(struct acpi_device *device, int type);
462 static void asus_hotk_notify(struct acpi_device *device, u32 event);
463
464 static const struct acpi_device_id asus_device_ids[] = {
465 {"ATK0100", 0},
466 {"", 0},
467 };
468 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
469
470 static struct acpi_driver asus_hotk_driver = {
471 .name = "asus_acpi",
472 .class = ACPI_HOTK_CLASS,
473 .owner = THIS_MODULE,
474 .ids = asus_device_ids,
475 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
476 .ops = {
477 .add = asus_hotk_add,
478 .remove = asus_hotk_remove,
479 .notify = asus_hotk_notify,
480 },
481 };
482
483 /*
484 * This function evaluates an ACPI method, given an int as parameter, the
485 * method is searched within the scope of the handle, can be NULL. The output
486 * of the method is written is output, which can also be NULL
487 *
488 * returns 1 if write is successful, 0 else.
489 */
490 static int write_acpi_int(acpi_handle handle, const char *method, int val,
491 struct acpi_buffer *output)
492 {
493 struct acpi_object_list params; /* list of input parameters (int) */
494 union acpi_object in_obj; /* the only param we use */
495 acpi_status status;
496
497 params.count = 1;
498 params.pointer = &in_obj;
499 in_obj.type = ACPI_TYPE_INTEGER;
500 in_obj.integer.value = val;
501
502 status = acpi_evaluate_object(handle, (char *)method, &params, output);
503 return (status == AE_OK);
504 }
505
506 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
507 {
508 struct acpi_buffer output;
509 union acpi_object out_obj;
510 acpi_status status;
511
512 output.length = sizeof(out_obj);
513 output.pointer = &out_obj;
514
515 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
516 *val = out_obj.integer.value;
517 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
518 }
519
520 static int asus_info_proc_show(struct seq_file *m, void *v)
521 {
522 int temp;
523
524 seq_printf(m, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
525 seq_printf(m, "Model reference : %s\n", hotk->methods->name);
526 /*
527 * The SFUN method probably allows the original driver to get the list
528 * of features supported by a given model. For now, 0x0100 or 0x0800
529 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
530 * The significance of others is yet to be found.
531 */
532 if (read_acpi_int(hotk->handle, "SFUN", &temp))
533 seq_printf(m, "SFUN value : 0x%04x\n", temp);
534 /*
535 * Another value for userspace: the ASYM method returns 0x02 for
536 * battery low and 0x04 for battery critical, its readings tend to be
537 * more accurate than those provided by _BST.
538 * Note: since not all the laptops provide this method, errors are
539 * silently ignored.
540 */
541 if (read_acpi_int(hotk->handle, "ASYM", &temp))
542 seq_printf(m, "ASYM value : 0x%04x\n", temp);
543 if (asus_info) {
544 seq_printf(m, "DSDT length : %d\n", asus_info->length);
545 seq_printf(m, "DSDT checksum : %d\n", asus_info->checksum);
546 seq_printf(m, "DSDT revision : %d\n", asus_info->revision);
547 seq_printf(m, "OEM id : %.*s\n", ACPI_OEM_ID_SIZE, asus_info->oem_id);
548 seq_printf(m, "OEM table id : %.*s\n", ACPI_OEM_TABLE_ID_SIZE, asus_info->oem_table_id);
549 seq_printf(m, "OEM revision : 0x%x\n", asus_info->oem_revision);
550 seq_printf(m, "ASL comp vendor id : %.*s\n", ACPI_NAME_SIZE, asus_info->asl_compiler_id);
551 seq_printf(m, "ASL comp revision : 0x%x\n", asus_info->asl_compiler_revision);
552 }
553
554 return 0;
555 }
556
557 static int asus_info_proc_open(struct inode *inode, struct file *file)
558 {
559 return single_open(file, asus_info_proc_show, NULL);
560 }
561
562 static const struct file_operations asus_info_proc_fops = {
563 .owner = THIS_MODULE,
564 .open = asus_info_proc_open,
565 .read = seq_read,
566 .llseek = seq_lseek,
567 .release = single_release,
568 };
569
570 /*
571 * /proc handlers
572 * We write our info in page, we begin at offset off and cannot write more
573 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
574 * number of bytes written in page
575 */
576
577 /* Generic LED functions */
578 static int read_led(const char *ledname, int ledmask)
579 {
580 if (ledname) {
581 int led_status;
582
583 if (read_acpi_int(NULL, ledname, &led_status))
584 return led_status;
585 else
586 pr_warn("Error reading LED status\n");
587 }
588 return (hotk->status & ledmask) ? 1 : 0;
589 }
590
591 static int parse_arg(const char __user *buf, unsigned long count, int *val)
592 {
593 char s[32];
594 if (!count)
595 return 0;
596 if (count > 31)
597 return -EINVAL;
598 if (copy_from_user(s, buf, count))
599 return -EFAULT;
600 s[count] = 0;
601 if (sscanf(s, "%i", val) != 1)
602 return -EINVAL;
603 return count;
604 }
605
606 /* FIXME: kill extraneous args so it can be called independently */
607 static int
608 write_led(const char __user *buffer, unsigned long count,
609 char *ledname, int ledmask, int invert)
610 {
611 int rv, value;
612 int led_out = 0;
613
614 rv = parse_arg(buffer, count, &value);
615 if (rv > 0)
616 led_out = value ? 1 : 0;
617
618 hotk->status =
619 (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
620
621 if (invert) /* invert target value */
622 led_out = !led_out;
623
624 if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
625 pr_warn("LED (%s) write failed\n", ledname);
626
627 return rv;
628 }
629
630 /*
631 * Proc handlers for MLED
632 */
633 static int mled_proc_show(struct seq_file *m, void *v)
634 {
635 seq_printf(m, "%d\n", read_led(hotk->methods->mled_status, MLED_ON));
636 return 0;
637 }
638
639 static int mled_proc_open(struct inode *inode, struct file *file)
640 {
641 return single_open(file, mled_proc_show, NULL);
642 }
643
644 static ssize_t mled_proc_write(struct file *file, const char __user *buffer,
645 size_t count, loff_t *pos)
646 {
647 return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
648 }
649
650 static const struct file_operations mled_proc_fops = {
651 .owner = THIS_MODULE,
652 .open = mled_proc_open,
653 .read = seq_read,
654 .llseek = seq_lseek,
655 .release = single_release,
656 .write = mled_proc_write,
657 };
658
659 /*
660 * Proc handlers for LED display
661 */
662 static int ledd_proc_show(struct seq_file *m, void *v)
663 {
664 seq_printf(m, "0x%08x\n", hotk->ledd_status);
665 return 0;
666 }
667
668 static int ledd_proc_open(struct inode *inode, struct file *file)
669 {
670 return single_open(file, ledd_proc_show, NULL);
671 }
672
673 static ssize_t ledd_proc_write(struct file *file, const char __user *buffer,
674 size_t count, loff_t *pos)
675 {
676 int rv, value;
677
678 rv = parse_arg(buffer, count, &value);
679 if (rv > 0) {
680 if (!write_acpi_int
681 (hotk->handle, hotk->methods->mt_ledd, value, NULL))
682 pr_warn("LED display write failed\n");
683 else
684 hotk->ledd_status = (u32) value;
685 }
686 return rv;
687 }
688
689 static const struct file_operations ledd_proc_fops = {
690 .owner = THIS_MODULE,
691 .open = ledd_proc_open,
692 .read = seq_read,
693 .llseek = seq_lseek,
694 .release = single_release,
695 .write = ledd_proc_write,
696 };
697
698 /*
699 * Proc handlers for WLED
700 */
701 static int wled_proc_show(struct seq_file *m, void *v)
702 {
703 seq_printf(m, "%d\n", read_led(hotk->methods->wled_status, WLED_ON));
704 return 0;
705 }
706
707 static int wled_proc_open(struct inode *inode, struct file *file)
708 {
709 return single_open(file, wled_proc_show, NULL);
710 }
711
712 static ssize_t wled_proc_write(struct file *file, const char __user *buffer,
713 size_t count, loff_t *pos)
714 {
715 return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
716 }
717
718 static const struct file_operations wled_proc_fops = {
719 .owner = THIS_MODULE,
720 .open = wled_proc_open,
721 .read = seq_read,
722 .llseek = seq_lseek,
723 .release = single_release,
724 .write = wled_proc_write,
725 };
726
727 /*
728 * Proc handlers for Bluetooth
729 */
730 static int bluetooth_proc_show(struct seq_file *m, void *v)
731 {
732 seq_printf(m, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
733 return 0;
734 }
735
736 static int bluetooth_proc_open(struct inode *inode, struct file *file)
737 {
738 return single_open(file, bluetooth_proc_show, NULL);
739 }
740
741 static ssize_t bluetooth_proc_write(struct file *file,
742 const char __user *buffer, size_t count, loff_t *pos)
743 {
744 /* Note: mt_bt_switch controls both internal Bluetooth adapter's
745 presence and its LED */
746 return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
747 }
748
749 static const struct file_operations bluetooth_proc_fops = {
750 .owner = THIS_MODULE,
751 .open = bluetooth_proc_open,
752 .read = seq_read,
753 .llseek = seq_lseek,
754 .release = single_release,
755 .write = bluetooth_proc_write,
756 };
757
758 /*
759 * Proc handlers for TLED
760 */
761 static int tled_proc_show(struct seq_file *m, void *v)
762 {
763 seq_printf(m, "%d\n", read_led(hotk->methods->tled_status, TLED_ON));
764 return 0;
765 }
766
767 static int tled_proc_open(struct inode *inode, struct file *file)
768 {
769 return single_open(file, tled_proc_show, NULL);
770 }
771
772 static ssize_t tled_proc_write(struct file *file, const char __user *buffer,
773 size_t count, loff_t *pos)
774 {
775 return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
776 }
777
778 static const struct file_operations tled_proc_fops = {
779 .owner = THIS_MODULE,
780 .open = tled_proc_open,
781 .read = seq_read,
782 .llseek = seq_lseek,
783 .release = single_release,
784 .write = tled_proc_write,
785 };
786
787 static int get_lcd_state(void)
788 {
789 int lcd = 0;
790
791 if (hotk->model == L3H) {
792 /* L3H and the like have to be handled differently */
793 acpi_status status = 0;
794 struct acpi_object_list input;
795 union acpi_object mt_params[2];
796 struct acpi_buffer output;
797 union acpi_object out_obj;
798
799 input.count = 2;
800 input.pointer = mt_params;
801 /* Note: the following values are partly guessed up, but
802 otherwise they seem to work */
803 mt_params[0].type = ACPI_TYPE_INTEGER;
804 mt_params[0].integer.value = 0x02;
805 mt_params[1].type = ACPI_TYPE_INTEGER;
806 mt_params[1].integer.value = 0x02;
807
808 output.length = sizeof(out_obj);
809 output.pointer = &out_obj;
810
811 status =
812 acpi_evaluate_object(NULL, hotk->methods->lcd_status,
813 &input, &output);
814 if (status != AE_OK)
815 return -1;
816 if (out_obj.type == ACPI_TYPE_INTEGER)
817 /* That's what the AML code does */
818 lcd = out_obj.integer.value >> 8;
819 } else if (hotk->model == F3Sa) {
820 unsigned long long tmp;
821 union acpi_object param;
822 struct acpi_object_list input;
823 acpi_status status;
824
825 /* Read pin 11 */
826 param.type = ACPI_TYPE_INTEGER;
827 param.integer.value = 0x11;
828 input.count = 1;
829 input.pointer = &param;
830
831 status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
832 &input, &tmp);
833 if (status != AE_OK)
834 return -1;
835
836 lcd = tmp;
837 } else {
838 /* We don't have to check anything if we are here */
839 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
840 pr_warn("Error reading LCD status\n");
841
842 if (hotk->model == L2D)
843 lcd = ~lcd;
844 }
845
846 return (lcd & 1);
847 }
848
849 static int set_lcd_state(int value)
850 {
851 int lcd = 0;
852 acpi_status status = 0;
853
854 lcd = value ? 1 : 0;
855 if (lcd != get_lcd_state()) {
856 /* switch */
857 if (hotk->model != L3H) {
858 status =
859 acpi_evaluate_object(NULL,
860 hotk->methods->mt_lcd_switch,
861 NULL, NULL);
862 } else {
863 /* L3H and the like must be handled differently */
864 if (!write_acpi_int
865 (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
866 NULL))
867 status = AE_ERROR;
868 /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
869 the exact behaviour is simulated here */
870 }
871 if (ACPI_FAILURE(status))
872 pr_warn("Error switching LCD\n");
873 }
874 return 0;
875
876 }
877
878 static int lcd_proc_show(struct seq_file *m, void *v)
879 {
880 seq_printf(m, "%d\n", get_lcd_state());
881 return 0;
882 }
883
884 static int lcd_proc_open(struct inode *inode, struct file *file)
885 {
886 return single_open(file, lcd_proc_show, NULL);
887 }
888
889 static ssize_t lcd_proc_write(struct file *file, const char __user *buffer,
890 size_t count, loff_t *pos)
891 {
892 int rv, value;
893
894 rv = parse_arg(buffer, count, &value);
895 if (rv > 0)
896 set_lcd_state(value);
897 return rv;
898 }
899
900 static const struct file_operations lcd_proc_fops = {
901 .owner = THIS_MODULE,
902 .open = lcd_proc_open,
903 .read = seq_read,
904 .llseek = seq_lseek,
905 .release = single_release,
906 .write = lcd_proc_write,
907 };
908
909 static int read_brightness(struct backlight_device *bd)
910 {
911 int value;
912
913 if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
914 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
915 &value))
916 pr_warn("Error reading brightness\n");
917 } else if (hotk->methods->brightness_status) { /* For D1 for example */
918 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
919 &value))
920 pr_warn("Error reading brightness\n");
921 } else /* No GPLV method */
922 value = hotk->brightness;
923 return value;
924 }
925
926 /*
927 * Change the brightness level
928 */
929 static int set_brightness(int value)
930 {
931 acpi_status status = 0;
932 int ret = 0;
933
934 /* SPLV laptop */
935 if (hotk->methods->brightness_set) {
936 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
937 value, NULL)) {
938 pr_warn("Error changing brightness\n");
939 ret = -EIO;
940 }
941 goto out;
942 }
943
944 /* No SPLV method if we are here, act as appropriate */
945 value -= read_brightness(NULL);
946 while (value != 0) {
947 status = acpi_evaluate_object(NULL, (value > 0) ?
948 hotk->methods->brightness_up :
949 hotk->methods->brightness_down,
950 NULL, NULL);
951 (value > 0) ? value-- : value++;
952 if (ACPI_FAILURE(status)) {
953 pr_warn("Error changing brightness\n");
954 ret = -EIO;
955 }
956 }
957 out:
958 return ret;
959 }
960
961 static int set_brightness_status(struct backlight_device *bd)
962 {
963 return set_brightness(bd->props.brightness);
964 }
965
966 static int brn_proc_show(struct seq_file *m, void *v)
967 {
968 seq_printf(m, "%d\n", read_brightness(NULL));
969 return 0;
970 }
971
972 static int brn_proc_open(struct inode *inode, struct file *file)
973 {
974 return single_open(file, brn_proc_show, NULL);
975 }
976
977 static ssize_t brn_proc_write(struct file *file, const char __user *buffer,
978 size_t count, loff_t *pos)
979 {
980 int rv, value;
981
982 rv = parse_arg(buffer, count, &value);
983 if (rv > 0) {
984 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
985 /* 0 <= value <= 15 */
986 set_brightness(value);
987 }
988 return rv;
989 }
990
991 static const struct file_operations brn_proc_fops = {
992 .owner = THIS_MODULE,
993 .open = brn_proc_open,
994 .read = seq_read,
995 .llseek = seq_lseek,
996 .release = single_release,
997 .write = brn_proc_write,
998 };
999
1000 static void set_display(int value)
1001 {
1002 /* no sanity check needed for now */
1003 if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
1004 value, NULL))
1005 pr_warn("Error setting display\n");
1006 return;
1007 }
1008
1009 /*
1010 * Now, *this* one could be more user-friendly, but so far, no-one has
1011 * complained. The significance of bits is the same as in proc_write_disp()
1012 */
1013 static int disp_proc_show(struct seq_file *m, void *v)
1014 {
1015 int value = 0;
1016
1017 if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
1018 pr_warn("Error reading display status\n");
1019 value &= 0x07; /* needed for some models, shouldn't hurt others */
1020 seq_printf(m, "%d\n", value);
1021 return 0;
1022 }
1023
1024 static int disp_proc_open(struct inode *inode, struct file *file)
1025 {
1026 return single_open(file, disp_proc_show, NULL);
1027 }
1028
1029 /*
1030 * Experimental support for display switching. As of now: 1 should activate
1031 * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
1032 * (bitwise) of these will suffice. I never actually tested 3 displays hooked
1033 * up simultaneously, so be warned. See the acpi4asus README for more info.
1034 */
1035 static ssize_t disp_proc_write(struct file *file, const char __user *buffer,
1036 size_t count, loff_t *pos)
1037 {
1038 int rv, value;
1039
1040 rv = parse_arg(buffer, count, &value);
1041 if (rv > 0)
1042 set_display(value);
1043 return rv;
1044 }
1045
1046 static const struct file_operations disp_proc_fops = {
1047 .owner = THIS_MODULE,
1048 .open = disp_proc_open,
1049 .read = seq_read,
1050 .llseek = seq_lseek,
1051 .release = single_release,
1052 .write = disp_proc_write,
1053 };
1054
1055 static int
1056 asus_proc_add(char *name, const struct file_operations *proc_fops, mode_t mode,
1057 struct acpi_device *device)
1058 {
1059 struct proc_dir_entry *proc;
1060
1061 proc = proc_create_data(name, mode, acpi_device_dir(device),
1062 proc_fops, acpi_driver_data(device));
1063 if (!proc) {
1064 pr_warn(" Unable to create %s fs entry\n", name);
1065 return -1;
1066 }
1067 proc->uid = asus_uid;
1068 proc->gid = asus_gid;
1069 return 0;
1070 }
1071
1072 static int asus_hotk_add_fs(struct acpi_device *device)
1073 {
1074 struct proc_dir_entry *proc;
1075 mode_t mode;
1076
1077 if ((asus_uid == 0) && (asus_gid == 0)) {
1078 mode = S_IFREG | S_IRUGO | S_IWUSR | S_IWGRP;
1079 } else {
1080 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
1081 pr_warn(" asus_uid and asus_gid parameters are "
1082 "deprecated, use chown and chmod instead!\n");
1083 }
1084
1085 acpi_device_dir(device) = asus_proc_dir;
1086 if (!acpi_device_dir(device))
1087 return -ENODEV;
1088
1089 proc = proc_create(PROC_INFO, mode, acpi_device_dir(device),
1090 &asus_info_proc_fops);
1091 if (proc) {
1092 proc->uid = asus_uid;
1093 proc->gid = asus_gid;
1094 } else {
1095 pr_warn(" Unable to create " PROC_INFO " fs entry\n");
1096 }
1097
1098 if (hotk->methods->mt_wled) {
1099 asus_proc_add(PROC_WLED, &wled_proc_fops, mode, device);
1100 }
1101
1102 if (hotk->methods->mt_ledd) {
1103 asus_proc_add(PROC_LEDD, &ledd_proc_fops, mode, device);
1104 }
1105
1106 if (hotk->methods->mt_mled) {
1107 asus_proc_add(PROC_MLED, &mled_proc_fops, mode, device);
1108 }
1109
1110 if (hotk->methods->mt_tled) {
1111 asus_proc_add(PROC_TLED, &tled_proc_fops, mode, device);
1112 }
1113
1114 if (hotk->methods->mt_bt_switch) {
1115 asus_proc_add(PROC_BT, &bluetooth_proc_fops, mode, device);
1116 }
1117
1118 /*
1119 * We need both read node and write method as LCD switch is also
1120 * accessible from the keyboard
1121 */
1122 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
1123 asus_proc_add(PROC_LCD, &lcd_proc_fops, mode, device);
1124 }
1125
1126 if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
1127 (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
1128 asus_proc_add(PROC_BRN, &brn_proc_fops, mode, device);
1129 }
1130
1131 if (hotk->methods->display_set) {
1132 asus_proc_add(PROC_DISP, &disp_proc_fops, mode, device);
1133 }
1134
1135 return 0;
1136 }
1137
1138 static int asus_hotk_remove_fs(struct acpi_device *device)
1139 {
1140 if (acpi_device_dir(device)) {
1141 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1142 if (hotk->methods->mt_wled)
1143 remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1144 if (hotk->methods->mt_mled)
1145 remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1146 if (hotk->methods->mt_tled)
1147 remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1148 if (hotk->methods->mt_ledd)
1149 remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1150 if (hotk->methods->mt_bt_switch)
1151 remove_proc_entry(PROC_BT, acpi_device_dir(device));
1152 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1153 remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1154 if ((hotk->methods->brightness_up
1155 && hotk->methods->brightness_down)
1156 || (hotk->methods->brightness_get
1157 && hotk->methods->brightness_set))
1158 remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1159 if (hotk->methods->display_set)
1160 remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1161 }
1162 return 0;
1163 }
1164
1165 static void asus_hotk_notify(struct acpi_device *device, u32 event)
1166 {
1167 /* TODO Find a better way to handle events count. */
1168 if (!hotk)
1169 return;
1170
1171 /*
1172 * The BIOS *should* be sending us device events, but apparently
1173 * Asus uses system events instead, so just ignore any device
1174 * events we get.
1175 */
1176 if (event > ACPI_MAX_SYS_NOTIFY)
1177 return;
1178
1179 if ((event & ~((u32) BR_UP)) < 16)
1180 hotk->brightness = (event & ~((u32) BR_UP));
1181 else if ((event & ~((u32) BR_DOWN)) < 16)
1182 hotk->brightness = (event & ~((u32) BR_DOWN));
1183
1184 acpi_bus_generate_proc_event(hotk->device, event,
1185 hotk->event_count[event % 128]++);
1186
1187 return;
1188 }
1189
1190 /*
1191 * Match the model string to the list of supported models. Return END_MODEL if
1192 * no match or model is NULL.
1193 */
1194 static int asus_model_match(char *model)
1195 {
1196 if (model == NULL)
1197 return END_MODEL;
1198
1199 if (strncmp(model, "L3D", 3) == 0)
1200 return L3D;
1201 else if (strncmp(model, "L2E", 3) == 0 ||
1202 strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1203 return L3H;
1204 else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1205 return L3C;
1206 else if (strncmp(model, "L8L", 3) == 0)
1207 return L8L;
1208 else if (strncmp(model, "L4R", 3) == 0)
1209 return L4R;
1210 else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1211 return M6N;
1212 else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1213 return M6R;
1214 else if (strncmp(model, "M2N", 3) == 0 ||
1215 strncmp(model, "M3N", 3) == 0 ||
1216 strncmp(model, "M5N", 3) == 0 ||
1217 strncmp(model, "S1N", 3) == 0 ||
1218 strncmp(model, "S5N", 3) == 0)
1219 return xxN;
1220 else if (strncmp(model, "M1", 2) == 0)
1221 return M1A;
1222 else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1223 return M2E;
1224 else if (strncmp(model, "L2", 2) == 0)
1225 return L2D;
1226 else if (strncmp(model, "L8", 2) == 0)
1227 return S1x;
1228 else if (strncmp(model, "D1", 2) == 0)
1229 return D1x;
1230 else if (strncmp(model, "A1", 2) == 0)
1231 return A1x;
1232 else if (strncmp(model, "A2", 2) == 0)
1233 return A2x;
1234 else if (strncmp(model, "J1", 2) == 0)
1235 return S2x;
1236 else if (strncmp(model, "L5", 2) == 0)
1237 return L5x;
1238 else if (strncmp(model, "A4G", 3) == 0)
1239 return A4G;
1240 else if (strncmp(model, "W1N", 3) == 0)
1241 return W1N;
1242 else if (strncmp(model, "W3V", 3) == 0)
1243 return W3V;
1244 else if (strncmp(model, "W5A", 3) == 0)
1245 return W5A;
1246 else if (strncmp(model, "R1F", 3) == 0)
1247 return R1F;
1248 else if (strncmp(model, "A4S", 3) == 0)
1249 return A4S;
1250 else if (strncmp(model, "F3Sa", 4) == 0)
1251 return F3Sa;
1252 else
1253 return END_MODEL;
1254 }
1255
1256 /*
1257 * This function is used to initialize the hotk with right values. In this
1258 * method, we can make all the detection we want, and modify the hotk struct
1259 */
1260 static int asus_hotk_get_info(void)
1261 {
1262 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1263 union acpi_object *model = NULL;
1264 int bsts_result;
1265 char *string = NULL;
1266 acpi_status status;
1267
1268 /*
1269 * Get DSDT headers early enough to allow for differentiating between
1270 * models, but late enough to allow acpi_bus_register_driver() to fail
1271 * before doing anything ACPI-specific. Should we encounter a machine,
1272 * which needs special handling (i.e. its hotkey device has a different
1273 * HID), this bit will be moved. A global variable asus_info contains
1274 * the DSDT header.
1275 */
1276 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
1277 if (ACPI_FAILURE(status))
1278 pr_warn(" Couldn't get the DSDT table header\n");
1279
1280 /* We have to write 0 on init this far for all ASUS models */
1281 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1282 pr_err(" Hotkey initialization failed\n");
1283 return -ENODEV;
1284 }
1285
1286 /* This needs to be called for some laptops to init properly */
1287 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1288 pr_warn(" Error calling BSTS\n");
1289 else if (bsts_result)
1290 pr_notice(" BSTS called, 0x%02x returned\n", bsts_result);
1291
1292 /*
1293 * Try to match the object returned by INIT to the specific model.
1294 * Handle every possible object (or the lack of thereof) the DSDT
1295 * writers might throw at us. When in trouble, we pass NULL to
1296 * asus_model_match() and try something completely different.
1297 */
1298 if (buffer.pointer) {
1299 model = buffer.pointer;
1300 switch (model->type) {
1301 case ACPI_TYPE_STRING:
1302 string = model->string.pointer;
1303 break;
1304 case ACPI_TYPE_BUFFER:
1305 string = model->buffer.pointer;
1306 break;
1307 default:
1308 kfree(model);
1309 model = NULL;
1310 break;
1311 }
1312 }
1313 hotk->model = asus_model_match(string);
1314 if (hotk->model == END_MODEL) { /* match failed */
1315 if (asus_info &&
1316 strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1317 hotk->model = P30;
1318 pr_notice(" Samsung P30 detected, supported\n");
1319 hotk->methods = &model_conf[hotk->model];
1320 kfree(model);
1321 return 0;
1322 } else {
1323 hotk->model = M2E;
1324 pr_notice(" unsupported model %s, trying default values\n",
1325 string);
1326 pr_notice(" send /proc/acpi/dsdt to the developers\n");
1327 kfree(model);
1328 return -ENODEV;
1329 }
1330 }
1331 hotk->methods = &model_conf[hotk->model];
1332 pr_notice(" %s model detected, supported\n", string);
1333
1334 /* Sort of per-model blacklist */
1335 if (strncmp(string, "L2B", 3) == 0)
1336 hotk->methods->lcd_status = NULL;
1337 /* L2B is similar enough to L3C to use its settings, with this only
1338 exception */
1339 else if (strncmp(string, "A3G", 3) == 0)
1340 hotk->methods->lcd_status = "\\BLFG";
1341 /* A3G is like M6R */
1342 else if (strncmp(string, "S5N", 3) == 0 ||
1343 strncmp(string, "M5N", 3) == 0 ||
1344 strncmp(string, "W3N", 3) == 0)
1345 hotk->methods->mt_mled = NULL;
1346 /* S5N, M5N and W3N have no MLED */
1347 else if (strncmp(string, "L5D", 3) == 0)
1348 hotk->methods->mt_wled = NULL;
1349 /* L5D's WLED is not controlled by ACPI */
1350 else if (strncmp(string, "M2N", 3) == 0 ||
1351 strncmp(string, "W3V", 3) == 0 ||
1352 strncmp(string, "S1N", 3) == 0)
1353 hotk->methods->mt_wled = "WLED";
1354 /* M2N, S1N and W3V have a usable WLED */
1355 else if (asus_info) {
1356 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1357 hotk->methods->mled_status = NULL;
1358 /* S1300A reports L84F, but L1400B too, account for that */
1359 }
1360
1361 kfree(model);
1362
1363 return 0;
1364 }
1365
1366 static int asus_hotk_check(void)
1367 {
1368 int result = 0;
1369
1370 result = acpi_bus_get_status(hotk->device);
1371 if (result)
1372 return result;
1373
1374 if (hotk->device->status.present) {
1375 result = asus_hotk_get_info();
1376 } else {
1377 pr_err(" Hotkey device not present, aborting\n");
1378 return -EINVAL;
1379 }
1380
1381 return result;
1382 }
1383
1384 static int asus_hotk_found;
1385
1386 static int asus_hotk_add(struct acpi_device *device)
1387 {
1388 acpi_status status = AE_OK;
1389 int result;
1390
1391 pr_notice("Asus Laptop ACPI Extras version %s\n", ASUS_ACPI_VERSION);
1392
1393 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1394 if (!hotk)
1395 return -ENOMEM;
1396
1397 hotk->handle = device->handle;
1398 strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1399 strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1400 device->driver_data = hotk;
1401 hotk->device = device;
1402
1403 result = asus_hotk_check();
1404 if (result)
1405 goto end;
1406
1407 result = asus_hotk_add_fs(device);
1408 if (result)
1409 goto end;
1410
1411 /* For laptops without GPLV: init the hotk->brightness value */
1412 if ((!hotk->methods->brightness_get)
1413 && (!hotk->methods->brightness_status)
1414 && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1415 status =
1416 acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1417 NULL, NULL);
1418 if (ACPI_FAILURE(status))
1419 pr_warn(" Error changing brightness\n");
1420 else {
1421 status =
1422 acpi_evaluate_object(NULL,
1423 hotk->methods->brightness_up,
1424 NULL, NULL);
1425 if (ACPI_FAILURE(status))
1426 pr_warn(" Strange, error changing brightness\n");
1427 }
1428 }
1429
1430 asus_hotk_found = 1;
1431
1432 /* LED display is off by default */
1433 hotk->ledd_status = 0xFFF;
1434
1435 end:
1436 if (result)
1437 kfree(hotk);
1438
1439 return result;
1440 }
1441
1442 static int asus_hotk_remove(struct acpi_device *device, int type)
1443 {
1444 asus_hotk_remove_fs(device);
1445
1446 kfree(hotk);
1447
1448 return 0;
1449 }
1450
1451 static const struct backlight_ops asus_backlight_data = {
1452 .get_brightness = read_brightness,
1453 .update_status = set_brightness_status,
1454 };
1455
1456 static void asus_acpi_exit(void)
1457 {
1458 if (asus_backlight_device)
1459 backlight_device_unregister(asus_backlight_device);
1460
1461 acpi_bus_unregister_driver(&asus_hotk_driver);
1462 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1463
1464 return;
1465 }
1466
1467 static int __init asus_acpi_init(void)
1468 {
1469 struct backlight_properties props;
1470 int result;
1471
1472 result = acpi_bus_register_driver(&asus_hotk_driver);
1473 if (result < 0)
1474 return result;
1475
1476 asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1477 if (!asus_proc_dir) {
1478 pr_err("Unable to create /proc entry\n");
1479 acpi_bus_unregister_driver(&asus_hotk_driver);
1480 return -ENODEV;
1481 }
1482
1483 /*
1484 * This is a bit of a kludge. We only want this module loaded
1485 * for ASUS systems, but there's currently no way to probe the
1486 * ACPI namespace for ASUS HIDs. So we just return failure if
1487 * we didn't find one, which will cause the module to be
1488 * unloaded.
1489 */
1490 if (!asus_hotk_found) {
1491 acpi_bus_unregister_driver(&asus_hotk_driver);
1492 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1493 return -ENODEV;
1494 }
1495
1496 memset(&props, 0, sizeof(struct backlight_properties));
1497 props.type = BACKLIGHT_PLATFORM;
1498 props.max_brightness = 15;
1499 asus_backlight_device = backlight_device_register("asus", NULL, NULL,
1500 &asus_backlight_data,
1501 &props);
1502 if (IS_ERR(asus_backlight_device)) {
1503 pr_err("Could not register asus backlight device\n");
1504 asus_backlight_device = NULL;
1505 asus_acpi_exit();
1506 return -ENODEV;
1507 }
1508
1509 return 0;
1510 }
1511
1512 module_init(asus_acpi_init);
1513 module_exit(asus_acpi_exit);
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