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1 | /* | |
2 | * asus-laptop.c - Asus Laptop Support | |
3 | * | |
4 | * | |
5 | * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor | |
6 | * Copyright (C) 2006 Corentin Chary | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | * | |
23 | * The development page for this driver is located at | |
24 | * http://sourceforge.net/projects/acpi4asus/ | |
25 | * | |
26 | * Credits: | |
27 | * Pontus Fuchs - Helper functions, cleanup | |
28 | * Johann Wiesner - Small compile fixes | |
29 | * John Belmonte - ACPI code for Toshiba laptop was a good starting point. | |
30 | * Eric Burghard - LED display support for W1N | |
31 | * Josh Green - Light Sens support | |
32 | * Thomas Tuttle - His first patch for led support was very helpfull | |
33 | * | |
34 | */ | |
35 | ||
36 | #include <linux/autoconf.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/types.h> | |
41 | #include <linux/err.h> | |
42 | #include <linux/proc_fs.h> | |
43 | #include <linux/backlight.h> | |
44 | #include <linux/fb.h> | |
45 | #include <linux/leds.h> | |
46 | #include <linux/platform_device.h> | |
47 | #include <acpi/acpi_drivers.h> | |
48 | #include <acpi/acpi_bus.h> | |
49 | #include <asm/uaccess.h> | |
50 | ||
51 | #define ASUS_LAPTOP_VERSION "0.40" | |
52 | ||
53 | #define ASUS_HOTK_NAME "Asus Laptop Support" | |
54 | #define ASUS_HOTK_CLASS "hotkey" | |
55 | #define ASUS_HOTK_DEVICE_NAME "Hotkey" | |
56 | #define ASUS_HOTK_HID "ATK0100" | |
57 | #define ASUS_HOTK_FILE "asus-laptop" | |
58 | #define ASUS_HOTK_PREFIX "\\_SB.ATKD." | |
59 | ||
60 | /* | |
61 | * Some events we use, same for all Asus | |
62 | */ | |
63 | #define ATKD_BR_UP 0x10 | |
64 | #define ATKD_BR_DOWN 0x20 | |
65 | #define ATKD_LCD_ON 0x33 | |
66 | #define ATKD_LCD_OFF 0x34 | |
67 | ||
68 | /* | |
69 | * Known bits returned by \_SB.ATKD.HWRS | |
70 | */ | |
71 | #define WL_HWRS 0x80 | |
72 | #define BT_HWRS 0x100 | |
73 | ||
74 | /* | |
75 | * Flags for hotk status | |
76 | * WL_ON and BT_ON are also used for wireless_status() | |
77 | */ | |
78 | #define WL_ON 0x01 //internal Wifi | |
79 | #define BT_ON 0x02 //internal Bluetooth | |
80 | #define MLED_ON 0x04 //mail LED | |
81 | #define TLED_ON 0x08 //touchpad LED | |
82 | #define RLED_ON 0x10 //Record LED | |
83 | #define PLED_ON 0x20 //Phone LED | |
84 | #define LCD_ON 0x40 //LCD backlight | |
85 | ||
86 | #define ASUS_LOG ASUS_HOTK_FILE ": " | |
87 | #define ASUS_ERR KERN_ERR ASUS_LOG | |
88 | #define ASUS_WARNING KERN_WARNING ASUS_LOG | |
89 | #define ASUS_NOTICE KERN_NOTICE ASUS_LOG | |
90 | #define ASUS_INFO KERN_INFO ASUS_LOG | |
91 | #define ASUS_DEBUG KERN_DEBUG ASUS_LOG | |
92 | ||
93 | MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary"); | |
94 | MODULE_DESCRIPTION(ASUS_HOTK_NAME); | |
95 | MODULE_LICENSE("GPL"); | |
96 | ||
97 | #define ASUS_HANDLE(object, paths...) \ | |
98 | static acpi_handle object##_handle = NULL; \ | |
99 | static char *object##_paths[] = { paths } | |
100 | ||
101 | /* LED */ | |
102 | ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED"); | |
103 | ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED"); | |
104 | ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */ | |
105 | ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */ | |
106 | ||
107 | /* LEDD */ | |
108 | ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM"); | |
109 | ||
110 | /* Bluetooth and WLAN | |
111 | * WLED and BLED are not handled like other XLED, because in some dsdt | |
112 | * they also control the WLAN/Bluetooth device. | |
113 | */ | |
114 | ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED"); | |
115 | ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED"); | |
116 | ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */ | |
117 | ||
118 | /* Brightness */ | |
119 | ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV"); | |
120 | ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV"); | |
121 | ||
122 | /* Backlight */ | |
123 | ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */ | |
124 | "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */ | |
125 | "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */ | |
126 | "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */ | |
127 | "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */ | |
128 | "\\_SB.PCI0.PX40.Q10", /* S1x */ | |
129 | "\\Q10"); /* A2x, L2D, L3D, M2E */ | |
130 | ||
131 | /* Display */ | |
132 | ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP"); | |
133 | ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G | |
134 | M6A M6V VX-1 V6J V6V W3Z */ | |
135 | "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V | |
136 | S5A M5A z33A W1Jc W2V */ | |
137 | "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */ | |
138 | "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */ | |
139 | "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */ | |
140 | "\\_SB.PCI0.VGA.GETD", /* Z96F */ | |
141 | "\\ACTD", /* A2D */ | |
142 | "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */ | |
143 | "\\DNXT", /* P30 */ | |
144 | "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */ | |
145 | "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */ | |
146 | ||
147 | ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */ | |
148 | ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */ | |
149 | ||
150 | /* | |
151 | * This is the main structure, we can use it to store anything interesting | |
152 | * about the hotk device | |
153 | */ | |
154 | struct asus_hotk { | |
155 | char *name; //laptop name | |
156 | struct acpi_device *device; //the device we are in | |
157 | acpi_handle handle; //the handle of the hotk device | |
158 | char status; //status of the hotk, for LEDs, ... | |
159 | u32 ledd_status; //status of the LED display | |
160 | u8 light_level; //light sensor level | |
161 | u8 light_switch; //light sensor switch value | |
162 | u16 event_count[128]; //count for each event TODO make this better | |
163 | }; | |
164 | ||
165 | /* | |
166 | * This header is made available to allow proper configuration given model, | |
167 | * revision number , ... this info cannot go in struct asus_hotk because it is | |
168 | * available before the hotk | |
169 | */ | |
170 | static struct acpi_table_header *asus_info; | |
171 | ||
172 | /* The actual device the driver binds to */ | |
173 | static struct asus_hotk *hotk; | |
174 | ||
175 | /* | |
176 | * The hotkey driver declaration | |
177 | */ | |
178 | static int asus_hotk_add(struct acpi_device *device); | |
179 | static int asus_hotk_remove(struct acpi_device *device, int type); | |
180 | static struct acpi_driver asus_hotk_driver = { | |
181 | .name = ASUS_HOTK_NAME, | |
182 | .class = ASUS_HOTK_CLASS, | |
183 | .ids = ASUS_HOTK_HID, | |
184 | .ops = { | |
185 | .add = asus_hotk_add, | |
186 | .remove = asus_hotk_remove, | |
187 | }, | |
188 | }; | |
189 | ||
190 | /* The backlight device /sys/class/backlight */ | |
191 | static struct backlight_device *asus_backlight_device; | |
192 | ||
193 | /* | |
194 | * The backlight class declaration | |
195 | */ | |
196 | static int read_brightness(struct backlight_device *bd); | |
197 | static int update_bl_status(struct backlight_device *bd); | |
198 | static struct backlight_ops asusbl_ops = { | |
199 | .get_brightness = read_brightness, | |
200 | .update_status = update_bl_status, | |
201 | }; | |
202 | ||
203 | /* These functions actually update the LED's, and are called from a | |
204 | * workqueue. By doing this as separate work rather than when the LED | |
205 | * subsystem asks, we avoid messing with the Asus ACPI stuff during a | |
206 | * potentially bad time, such as a timer interrupt. */ | |
207 | static struct workqueue_struct *led_workqueue; | |
208 | ||
209 | #define ASUS_LED(object, ledname) \ | |
210 | static void object##_led_set(struct led_classdev *led_cdev, \ | |
211 | enum led_brightness value); \ | |
212 | static void object##_led_update(struct work_struct *ignored); \ | |
213 | static int object##_led_wk; \ | |
214 | static DECLARE_WORK(object##_led_work, object##_led_update); \ | |
215 | static struct led_classdev object##_led = { \ | |
216 | .name = "asus:" ledname, \ | |
217 | .brightness_set = object##_led_set, \ | |
218 | } | |
219 | ||
220 | ASUS_LED(mled, "mail"); | |
221 | ASUS_LED(tled, "touchpad"); | |
222 | ASUS_LED(rled, "record"); | |
223 | ASUS_LED(pled, "phone"); | |
224 | ||
225 | /* | |
226 | * This function evaluates an ACPI method, given an int as parameter, the | |
227 | * method is searched within the scope of the handle, can be NULL. The output | |
228 | * of the method is written is output, which can also be NULL | |
229 | * | |
230 | * returns 1 if write is successful, 0 else. | |
231 | */ | |
232 | static int write_acpi_int(acpi_handle handle, const char *method, int val, | |
233 | struct acpi_buffer *output) | |
234 | { | |
235 | struct acpi_object_list params; //list of input parameters (an int here) | |
236 | union acpi_object in_obj; //the only param we use | |
237 | acpi_status status; | |
238 | ||
239 | params.count = 1; | |
240 | params.pointer = &in_obj; | |
241 | in_obj.type = ACPI_TYPE_INTEGER; | |
242 | in_obj.integer.value = val; | |
243 | ||
244 | status = acpi_evaluate_object(handle, (char *)method, ¶ms, output); | |
245 | return (status == AE_OK); | |
246 | } | |
247 | ||
248 | static int read_wireless_status(int mask) | |
249 | { | |
250 | ulong status; | |
251 | acpi_status rv = AE_OK; | |
252 | ||
253 | if (!wireless_status_handle) | |
254 | return (hotk->status & mask) ? 1 : 0; | |
255 | ||
256 | rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status); | |
257 | if (ACPI_FAILURE(rv)) | |
258 | printk(ASUS_WARNING "Error reading Wireless status\n"); | |
259 | else | |
260 | return (status & mask) ? 1 : 0; | |
261 | ||
262 | return (hotk->status & mask) ? 1 : 0; | |
263 | } | |
264 | ||
265 | /* Generic LED functions */ | |
266 | static int read_status(int mask) | |
267 | { | |
268 | /* There is a special method for both wireless devices */ | |
269 | if (mask == BT_ON || mask == WL_ON) | |
270 | return read_wireless_status(mask); | |
271 | ||
272 | return (hotk->status & mask) ? 1 : 0; | |
273 | } | |
274 | ||
275 | static void write_status(acpi_handle handle, int out, int mask, int invert) | |
276 | { | |
277 | hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask); | |
278 | ||
279 | if (invert) /* invert target value */ | |
280 | out = !out & 0x1; | |
281 | ||
282 | if (handle && !write_acpi_int(handle, NULL, out, NULL)) | |
283 | printk(ASUS_WARNING " write failed\n"); | |
284 | } | |
285 | ||
286 | /* /sys/class/led handlers */ | |
287 | #define ASUS_LED_HANDLER(object, mask, invert) \ | |
288 | static void object##_led_set(struct led_classdev *led_cdev, \ | |
289 | enum led_brightness value) \ | |
290 | { \ | |
291 | object##_led_wk = value; \ | |
292 | queue_work(led_workqueue, &object##_led_work); \ | |
293 | } \ | |
294 | static void object##_led_update(struct work_struct *ignored) \ | |
295 | { \ | |
296 | int value = object##_led_wk; \ | |
297 | write_status(object##_set_handle, value, (mask), (invert)); \ | |
298 | } | |
299 | ||
300 | ASUS_LED_HANDLER(mled, MLED_ON, 1); | |
301 | ASUS_LED_HANDLER(pled, PLED_ON, 0); | |
302 | ASUS_LED_HANDLER(rled, RLED_ON, 0); | |
303 | ASUS_LED_HANDLER(tled, TLED_ON, 0); | |
304 | ||
305 | static int get_lcd_state(void) | |
306 | { | |
307 | return read_status(LCD_ON); | |
308 | } | |
309 | ||
310 | static int set_lcd_state(int value) | |
311 | { | |
312 | int lcd = 0; | |
313 | acpi_status status = 0; | |
314 | ||
315 | lcd = value ? 1 : 0; | |
316 | ||
317 | if (lcd == get_lcd_state()) | |
318 | return 0; | |
319 | ||
320 | if (lcd_switch_handle) { | |
321 | status = acpi_evaluate_object(lcd_switch_handle, | |
322 | NULL, NULL, NULL); | |
323 | ||
324 | if (ACPI_FAILURE(status)) | |
325 | printk(ASUS_WARNING "Error switching LCD\n"); | |
326 | } | |
327 | ||
328 | write_status(NULL, lcd, LCD_ON, 0); | |
329 | return 0; | |
330 | } | |
331 | ||
332 | static void lcd_blank(int blank) | |
333 | { | |
334 | struct backlight_device *bd = asus_backlight_device; | |
335 | ||
336 | if (bd) { | |
337 | bd->props.power = blank; | |
338 | backlight_update_status(bd); | |
339 | } | |
340 | } | |
341 | ||
342 | static int read_brightness(struct backlight_device *bd) | |
343 | { | |
344 | ulong value; | |
345 | acpi_status rv = AE_OK; | |
346 | ||
347 | rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value); | |
348 | if (ACPI_FAILURE(rv)) | |
349 | printk(ASUS_WARNING "Error reading brightness\n"); | |
350 | ||
351 | return value; | |
352 | } | |
353 | ||
354 | static int set_brightness(struct backlight_device *bd, int value) | |
355 | { | |
356 | int ret = 0; | |
357 | ||
358 | value = (0 < value) ? ((15 < value) ? 15 : value) : 0; | |
359 | /* 0 <= value <= 15 */ | |
360 | ||
361 | if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) { | |
362 | printk(ASUS_WARNING "Error changing brightness\n"); | |
363 | ret = -EIO; | |
364 | } | |
365 | ||
366 | return ret; | |
367 | } | |
368 | ||
369 | static int update_bl_status(struct backlight_device *bd) | |
370 | { | |
371 | int rv; | |
372 | int value = bd->props.brightness; | |
373 | ||
374 | rv = set_brightness(bd, value); | |
375 | if (rv) | |
376 | return rv; | |
377 | ||
378 | value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0; | |
379 | return set_lcd_state(value); | |
380 | } | |
381 | ||
382 | /* | |
383 | * Platform device handlers | |
384 | */ | |
385 | ||
386 | /* | |
387 | * We write our info in page, we begin at offset off and cannot write more | |
388 | * than count bytes. We set eof to 1 if we handle those 2 values. We return the | |
389 | * number of bytes written in page | |
390 | */ | |
391 | static ssize_t show_infos(struct device *dev, | |
392 | struct device_attribute *attr, char *page) | |
393 | { | |
394 | int len = 0; | |
395 | ulong temp; | |
396 | char buf[16]; //enough for all info | |
397 | acpi_status rv = AE_OK; | |
398 | ||
399 | /* | |
400 | * We use the easy way, we don't care of off and count, so we don't set eof | |
401 | * to 1 | |
402 | */ | |
403 | ||
404 | len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n"); | |
405 | len += sprintf(page + len, "Model reference : %s\n", hotk->name); | |
406 | /* | |
407 | * The SFUN method probably allows the original driver to get the list | |
408 | * of features supported by a given model. For now, 0x0100 or 0x0800 | |
409 | * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. | |
410 | * The significance of others is yet to be found. | |
411 | */ | |
412 | rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp); | |
413 | if (!ACPI_FAILURE(rv)) | |
414 | len += sprintf(page + len, "SFUN value : 0x%04x\n", | |
415 | (uint) temp); | |
416 | /* | |
417 | * Another value for userspace: the ASYM method returns 0x02 for | |
418 | * battery low and 0x04 for battery critical, its readings tend to be | |
419 | * more accurate than those provided by _BST. | |
420 | * Note: since not all the laptops provide this method, errors are | |
421 | * silently ignored. | |
422 | */ | |
423 | rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp); | |
424 | if (!ACPI_FAILURE(rv)) | |
425 | len += sprintf(page + len, "ASYM value : 0x%04x\n", | |
426 | (uint) temp); | |
427 | if (asus_info) { | |
428 | snprintf(buf, 16, "%d", asus_info->length); | |
429 | len += sprintf(page + len, "DSDT length : %s\n", buf); | |
430 | snprintf(buf, 16, "%d", asus_info->checksum); | |
431 | len += sprintf(page + len, "DSDT checksum : %s\n", buf); | |
432 | snprintf(buf, 16, "%d", asus_info->revision); | |
433 | len += sprintf(page + len, "DSDT revision : %s\n", buf); | |
434 | snprintf(buf, 7, "%s", asus_info->oem_id); | |
435 | len += sprintf(page + len, "OEM id : %s\n", buf); | |
436 | snprintf(buf, 9, "%s", asus_info->oem_table_id); | |
437 | len += sprintf(page + len, "OEM table id : %s\n", buf); | |
438 | snprintf(buf, 16, "%x", asus_info->oem_revision); | |
439 | len += sprintf(page + len, "OEM revision : 0x%s\n", buf); | |
440 | snprintf(buf, 5, "%s", asus_info->asl_compiler_id); | |
441 | len += sprintf(page + len, "ASL comp vendor id : %s\n", buf); | |
442 | snprintf(buf, 16, "%x", asus_info->asl_compiler_revision); | |
443 | len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf); | |
444 | } | |
445 | ||
446 | return len; | |
447 | } | |
448 | ||
449 | static int parse_arg(const char *buf, unsigned long count, int *val) | |
450 | { | |
451 | if (!count) | |
452 | return 0; | |
453 | if (count > 31) | |
454 | return -EINVAL; | |
455 | if (sscanf(buf, "%i", val) != 1) | |
456 | return -EINVAL; | |
457 | return count; | |
458 | } | |
459 | ||
460 | static ssize_t store_status(const char *buf, size_t count, | |
461 | acpi_handle handle, int mask, int invert) | |
462 | { | |
463 | int rv, value; | |
464 | int out = 0; | |
465 | ||
466 | rv = parse_arg(buf, count, &value); | |
467 | if (rv > 0) | |
468 | out = value ? 1 : 0; | |
469 | ||
470 | write_status(handle, out, mask, invert); | |
471 | ||
472 | return rv; | |
473 | } | |
474 | ||
475 | /* | |
476 | * LEDD display | |
477 | */ | |
478 | static ssize_t show_ledd(struct device *dev, | |
479 | struct device_attribute *attr, char *buf) | |
480 | { | |
481 | return sprintf(buf, "0x%08x\n", hotk->ledd_status); | |
482 | } | |
483 | ||
484 | static ssize_t store_ledd(struct device *dev, struct device_attribute *attr, | |
485 | const char *buf, size_t count) | |
486 | { | |
487 | int rv, value; | |
488 | ||
489 | rv = parse_arg(buf, count, &value); | |
490 | if (rv > 0) { | |
491 | if (!write_acpi_int(ledd_set_handle, NULL, value, NULL)) | |
492 | printk(ASUS_WARNING "LED display write failed\n"); | |
493 | else | |
494 | hotk->ledd_status = (u32) value; | |
495 | } | |
496 | return rv; | |
497 | } | |
498 | ||
499 | /* | |
500 | * WLAN | |
501 | */ | |
502 | static ssize_t show_wlan(struct device *dev, | |
503 | struct device_attribute *attr, char *buf) | |
504 | { | |
505 | return sprintf(buf, "%d\n", read_status(WL_ON)); | |
506 | } | |
507 | ||
508 | static ssize_t store_wlan(struct device *dev, struct device_attribute *attr, | |
509 | const char *buf, size_t count) | |
510 | { | |
511 | return store_status(buf, count, wl_switch_handle, WL_ON, 0); | |
512 | } | |
513 | ||
514 | /* | |
515 | * Bluetooth | |
516 | */ | |
517 | static ssize_t show_bluetooth(struct device *dev, | |
518 | struct device_attribute *attr, char *buf) | |
519 | { | |
520 | return sprintf(buf, "%d\n", read_status(BT_ON)); | |
521 | } | |
522 | ||
523 | static ssize_t store_bluetooth(struct device *dev, | |
524 | struct device_attribute *attr, const char *buf, | |
525 | size_t count) | |
526 | { | |
527 | return store_status(buf, count, bt_switch_handle, BT_ON, 0); | |
528 | } | |
529 | ||
530 | /* | |
531 | * Display | |
532 | */ | |
533 | static void set_display(int value) | |
534 | { | |
535 | /* no sanity check needed for now */ | |
536 | if (!write_acpi_int(display_set_handle, NULL, value, NULL)) | |
537 | printk(ASUS_WARNING "Error setting display\n"); | |
538 | return; | |
539 | } | |
540 | ||
541 | static int read_display(void) | |
542 | { | |
543 | ulong value = 0; | |
544 | acpi_status rv = AE_OK; | |
545 | ||
546 | /* In most of the case, we know how to set the display, but sometime | |
547 | we can't read it */ | |
548 | if (display_get_handle) { | |
549 | rv = acpi_evaluate_integer(display_get_handle, NULL, | |
550 | NULL, &value); | |
551 | if (ACPI_FAILURE(rv)) | |
552 | printk(ASUS_WARNING "Error reading display status\n"); | |
553 | } | |
554 | ||
555 | value &= 0x0F; /* needed for some models, shouldn't hurt others */ | |
556 | ||
557 | return value; | |
558 | } | |
559 | ||
560 | /* | |
561 | * Now, *this* one could be more user-friendly, but so far, no-one has | |
562 | * complained. The significance of bits is the same as in store_disp() | |
563 | */ | |
564 | static ssize_t show_disp(struct device *dev, | |
565 | struct device_attribute *attr, char *buf) | |
566 | { | |
567 | return sprintf(buf, "%d\n", read_display()); | |
568 | } | |
569 | ||
570 | /* | |
571 | * Experimental support for display switching. As of now: 1 should activate | |
572 | * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI. | |
573 | * Any combination (bitwise) of these will suffice. I never actually tested 4 | |
574 | * displays hooked up simultaneously, so be warned. See the acpi4asus README | |
575 | * for more info. | |
576 | */ | |
577 | static ssize_t store_disp(struct device *dev, struct device_attribute *attr, | |
578 | const char *buf, size_t count) | |
579 | { | |
580 | int rv, value; | |
581 | ||
582 | rv = parse_arg(buf, count, &value); | |
583 | if (rv > 0) | |
584 | set_display(value); | |
585 | return rv; | |
586 | } | |
587 | ||
588 | /* | |
589 | * Light Sens | |
590 | */ | |
591 | static void set_light_sens_switch(int value) | |
592 | { | |
593 | if (!write_acpi_int(ls_switch_handle, NULL, value, NULL)) | |
594 | printk(ASUS_WARNING "Error setting light sensor switch\n"); | |
595 | hotk->light_switch = value; | |
596 | } | |
597 | ||
598 | static ssize_t show_lssw(struct device *dev, | |
599 | struct device_attribute *attr, char *buf) | |
600 | { | |
601 | return sprintf(buf, "%d\n", hotk->light_switch); | |
602 | } | |
603 | ||
604 | static ssize_t store_lssw(struct device *dev, struct device_attribute *attr, | |
605 | const char *buf, size_t count) | |
606 | { | |
607 | int rv, value; | |
608 | ||
609 | rv = parse_arg(buf, count, &value); | |
610 | if (rv > 0) | |
611 | set_light_sens_switch(value ? 1 : 0); | |
612 | ||
613 | return rv; | |
614 | } | |
615 | ||
616 | static void set_light_sens_level(int value) | |
617 | { | |
618 | if (!write_acpi_int(ls_level_handle, NULL, value, NULL)) | |
619 | printk(ASUS_WARNING "Error setting light sensor level\n"); | |
620 | hotk->light_level = value; | |
621 | } | |
622 | ||
623 | static ssize_t show_lslvl(struct device *dev, | |
624 | struct device_attribute *attr, char *buf) | |
625 | { | |
626 | return sprintf(buf, "%d\n", hotk->light_level); | |
627 | } | |
628 | ||
629 | static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr, | |
630 | const char *buf, size_t count) | |
631 | { | |
632 | int rv, value; | |
633 | ||
634 | rv = parse_arg(buf, count, &value); | |
635 | if (rv > 0) { | |
636 | value = (0 < value) ? ((15 < value) ? 15 : value) : 0; | |
637 | /* 0 <= value <= 15 */ | |
638 | set_light_sens_level(value); | |
639 | } | |
640 | ||
641 | return rv; | |
642 | } | |
643 | ||
644 | static void asus_hotk_notify(acpi_handle handle, u32 event, void *data) | |
645 | { | |
646 | /* TODO Find a better way to handle events count. */ | |
647 | if (!hotk) | |
648 | return; | |
649 | ||
650 | /* | |
651 | * We need to tell the backlight device when the backlight power is | |
652 | * switched | |
653 | */ | |
654 | if (event == ATKD_LCD_ON) { | |
655 | write_status(NULL, 1, LCD_ON, 0); | |
656 | lcd_blank(FB_BLANK_UNBLANK); | |
657 | } else if (event == ATKD_LCD_OFF) { | |
658 | write_status(NULL, 0, LCD_ON, 0); | |
659 | lcd_blank(FB_BLANK_POWERDOWN); | |
660 | } | |
661 | ||
662 | acpi_bus_generate_event(hotk->device, event, | |
663 | hotk->event_count[event % 128]++); | |
664 | ||
665 | return; | |
666 | } | |
667 | ||
668 | #define ASUS_CREATE_DEVICE_ATTR(_name) \ | |
669 | struct device_attribute dev_attr_##_name = { \ | |
670 | .attr = { \ | |
671 | .name = __stringify(_name), \ | |
672 | .mode = 0, \ | |
673 | .owner = THIS_MODULE }, \ | |
674 | .show = NULL, \ | |
675 | .store = NULL, \ | |
676 | } | |
677 | ||
678 | #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \ | |
679 | do { \ | |
680 | dev_attr_##_name.attr.mode = _mode; \ | |
681 | dev_attr_##_name.show = _show; \ | |
682 | dev_attr_##_name.store = _store; \ | |
683 | } while(0) | |
684 | ||
685 | static ASUS_CREATE_DEVICE_ATTR(infos); | |
686 | static ASUS_CREATE_DEVICE_ATTR(wlan); | |
687 | static ASUS_CREATE_DEVICE_ATTR(bluetooth); | |
688 | static ASUS_CREATE_DEVICE_ATTR(display); | |
689 | static ASUS_CREATE_DEVICE_ATTR(ledd); | |
690 | static ASUS_CREATE_DEVICE_ATTR(ls_switch); | |
691 | static ASUS_CREATE_DEVICE_ATTR(ls_level); | |
692 | ||
693 | static struct attribute *asuspf_attributes[] = { | |
694 | &dev_attr_infos.attr, | |
695 | &dev_attr_wlan.attr, | |
696 | &dev_attr_bluetooth.attr, | |
697 | &dev_attr_display.attr, | |
698 | &dev_attr_ledd.attr, | |
699 | &dev_attr_ls_switch.attr, | |
700 | &dev_attr_ls_level.attr, | |
701 | NULL | |
702 | }; | |
703 | ||
704 | static struct attribute_group asuspf_attribute_group = { | |
705 | .attrs = asuspf_attributes | |
706 | }; | |
707 | ||
708 | static struct platform_driver asuspf_driver = { | |
709 | .driver = { | |
710 | .name = ASUS_HOTK_FILE, | |
711 | .owner = THIS_MODULE, | |
712 | } | |
713 | }; | |
714 | ||
715 | static struct platform_device *asuspf_device; | |
716 | ||
717 | static void asus_hotk_add_fs(void) | |
718 | { | |
719 | ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL); | |
720 | ||
721 | if (wl_switch_handle) | |
722 | ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan); | |
723 | ||
724 | if (bt_switch_handle) | |
725 | ASUS_SET_DEVICE_ATTR(bluetooth, 0644, | |
726 | show_bluetooth, store_bluetooth); | |
727 | ||
728 | if (display_set_handle && display_get_handle) | |
729 | ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp); | |
730 | else if (display_set_handle) | |
731 | ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp); | |
732 | ||
733 | if (ledd_set_handle) | |
734 | ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd); | |
735 | ||
736 | if (ls_switch_handle && ls_level_handle) { | |
737 | ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl); | |
738 | ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw); | |
739 | } | |
740 | } | |
741 | ||
742 | static int asus_handle_init(char *name, acpi_handle * handle, | |
743 | char **paths, int num_paths) | |
744 | { | |
745 | int i; | |
746 | acpi_status status; | |
747 | ||
748 | for (i = 0; i < num_paths; i++) { | |
749 | status = acpi_get_handle(NULL, paths[i], handle); | |
750 | if (ACPI_SUCCESS(status)) | |
751 | return 0; | |
752 | } | |
753 | ||
754 | *handle = NULL; | |
755 | return -ENODEV; | |
756 | } | |
757 | ||
758 | #define ASUS_HANDLE_INIT(object) \ | |
759 | asus_handle_init(#object, &object##_handle, object##_paths, \ | |
760 | ARRAY_SIZE(object##_paths)) | |
761 | ||
762 | /* | |
763 | * This function is used to initialize the hotk with right values. In this | |
764 | * method, we can make all the detection we want, and modify the hotk struct | |
765 | */ | |
766 | static int asus_hotk_get_info(void) | |
767 | { | |
768 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
769 | union acpi_object *model = NULL; | |
770 | ulong bsts_result, hwrs_result; | |
771 | char *string = NULL; | |
772 | acpi_status status; | |
773 | ||
774 | /* | |
775 | * Get DSDT headers early enough to allow for differentiating between | |
776 | * models, but late enough to allow acpi_bus_register_driver() to fail | |
777 | * before doing anything ACPI-specific. Should we encounter a machine, | |
778 | * which needs special handling (i.e. its hotkey device has a different | |
779 | * HID), this bit will be moved. A global variable asus_info contains | |
780 | * the DSDT header. | |
781 | */ | |
782 | status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info); | |
783 | if (ACPI_FAILURE(status)) | |
784 | printk(ASUS_WARNING "Couldn't get the DSDT table header\n"); | |
785 | ||
786 | /* We have to write 0 on init this far for all ASUS models */ | |
787 | if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) { | |
788 | printk(ASUS_ERR "Hotkey initialization failed\n"); | |
789 | return -ENODEV; | |
790 | } | |
791 | ||
792 | /* This needs to be called for some laptops to init properly */ | |
793 | status = | |
794 | acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result); | |
795 | if (ACPI_FAILURE(status)) | |
796 | printk(ASUS_WARNING "Error calling BSTS\n"); | |
797 | else if (bsts_result) | |
798 | printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n", | |
799 | (uint) bsts_result); | |
800 | ||
801 | /* | |
802 | * Try to match the object returned by INIT to the specific model. | |
803 | * Handle every possible object (or the lack of thereof) the DSDT | |
804 | * writers might throw at us. When in trouble, we pass NULL to | |
805 | * asus_model_match() and try something completely different. | |
806 | */ | |
807 | if (buffer.pointer) { | |
808 | model = buffer.pointer; | |
809 | switch (model->type) { | |
810 | case ACPI_TYPE_STRING: | |
811 | string = model->string.pointer; | |
812 | break; | |
813 | case ACPI_TYPE_BUFFER: | |
814 | string = model->buffer.pointer; | |
815 | break; | |
816 | default: | |
817 | string = ""; | |
818 | break; | |
819 | } | |
820 | } | |
821 | hotk->name = kstrdup(string, GFP_KERNEL); | |
822 | if (!hotk->name) | |
823 | return -ENOMEM; | |
824 | ||
825 | if (*string) | |
826 | printk(ASUS_NOTICE " %s model detected\n", string); | |
827 | ||
828 | ASUS_HANDLE_INIT(mled_set); | |
829 | ASUS_HANDLE_INIT(tled_set); | |
830 | ASUS_HANDLE_INIT(rled_set); | |
831 | ASUS_HANDLE_INIT(pled_set); | |
832 | ||
833 | ASUS_HANDLE_INIT(ledd_set); | |
834 | ||
835 | /* | |
836 | * The HWRS method return informations about the hardware. | |
837 | * 0x80 bit is for WLAN, 0x100 for Bluetooth. | |
838 | * The significance of others is yet to be found. | |
839 | * If we don't find the method, we assume the device are present. | |
840 | */ | |
841 | status = | |
842 | acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result); | |
843 | if (ACPI_FAILURE(status)) | |
844 | hwrs_result = WL_HWRS | BT_HWRS; | |
845 | ||
846 | if (hwrs_result & WL_HWRS) | |
847 | ASUS_HANDLE_INIT(wl_switch); | |
848 | if (hwrs_result & BT_HWRS) | |
849 | ASUS_HANDLE_INIT(bt_switch); | |
850 | ||
851 | ASUS_HANDLE_INIT(wireless_status); | |
852 | ||
853 | ASUS_HANDLE_INIT(brightness_set); | |
854 | ASUS_HANDLE_INIT(brightness_get); | |
855 | ||
856 | ASUS_HANDLE_INIT(lcd_switch); | |
857 | ||
858 | ASUS_HANDLE_INIT(display_set); | |
859 | ASUS_HANDLE_INIT(display_get); | |
860 | ||
861 | /* There is a lot of models with "ALSL", but a few get | |
862 | a real light sens, so we need to check it. */ | |
863 | if (ASUS_HANDLE_INIT(ls_switch)) | |
864 | ASUS_HANDLE_INIT(ls_level); | |
865 | ||
866 | kfree(model); | |
867 | ||
868 | return AE_OK; | |
869 | } | |
870 | ||
871 | static int asus_hotk_check(void) | |
872 | { | |
873 | int result = 0; | |
874 | ||
875 | result = acpi_bus_get_status(hotk->device); | |
876 | if (result) | |
877 | return result; | |
878 | ||
879 | if (hotk->device->status.present) { | |
880 | result = asus_hotk_get_info(); | |
881 | } else { | |
882 | printk(ASUS_ERR "Hotkey device not present, aborting\n"); | |
883 | return -EINVAL; | |
884 | } | |
885 | ||
886 | return result; | |
887 | } | |
888 | ||
889 | static int asus_hotk_found; | |
890 | ||
891 | static int asus_hotk_add(struct acpi_device *device) | |
892 | { | |
893 | acpi_status status = AE_OK; | |
894 | int result; | |
895 | ||
896 | if (!device) | |
897 | return -EINVAL; | |
898 | ||
899 | printk(ASUS_NOTICE "Asus Laptop Support version %s\n", | |
900 | ASUS_LAPTOP_VERSION); | |
901 | ||
902 | hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL); | |
903 | if (!hotk) | |
904 | return -ENOMEM; | |
905 | memset(hotk, 0, sizeof(struct asus_hotk)); | |
906 | ||
907 | hotk->handle = device->handle; | |
908 | strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME); | |
909 | strcpy(acpi_device_class(device), ASUS_HOTK_CLASS); | |
910 | acpi_driver_data(device) = hotk; | |
911 | hotk->device = device; | |
912 | ||
913 | result = asus_hotk_check(); | |
914 | if (result) | |
915 | goto end; | |
916 | ||
917 | asus_hotk_add_fs(); | |
918 | ||
919 | /* | |
920 | * We install the handler, it will receive the hotk in parameter, so, we | |
921 | * could add other data to the hotk struct | |
922 | */ | |
923 | status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY, | |
924 | asus_hotk_notify, hotk); | |
925 | if (ACPI_FAILURE(status)) | |
926 | printk(ASUS_ERR "Error installing notify handler\n"); | |
927 | ||
928 | asus_hotk_found = 1; | |
929 | ||
930 | /* WLED and BLED are on by default */ | |
931 | write_status(bt_switch_handle, 1, BT_ON, 0); | |
932 | write_status(wl_switch_handle, 1, WL_ON, 0); | |
933 | ||
934 | /* LCD Backlight is on by default */ | |
935 | write_status(NULL, 1, LCD_ON, 0); | |
936 | ||
937 | /* LED display is off by default */ | |
938 | hotk->ledd_status = 0xFFF; | |
939 | ||
940 | /* Set initial values of light sensor and level */ | |
941 | hotk->light_switch = 1; /* Default to light sensor disabled */ | |
942 | hotk->light_level = 0; /* level 5 for sensor sensitivity */ | |
943 | ||
944 | if (ls_switch_handle) | |
945 | set_light_sens_switch(hotk->light_switch); | |
946 | ||
947 | if (ls_level_handle) | |
948 | set_light_sens_level(hotk->light_level); | |
949 | ||
950 | end: | |
951 | if (result) { | |
952 | kfree(hotk->name); | |
953 | kfree(hotk); | |
954 | } | |
955 | ||
956 | return result; | |
957 | } | |
958 | ||
959 | static int asus_hotk_remove(struct acpi_device *device, int type) | |
960 | { | |
961 | acpi_status status = 0; | |
962 | ||
963 | if (!device || !acpi_driver_data(device)) | |
964 | return -EINVAL; | |
965 | ||
966 | status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY, | |
967 | asus_hotk_notify); | |
968 | if (ACPI_FAILURE(status)) | |
969 | printk(ASUS_ERR "Error removing notify handler\n"); | |
970 | ||
971 | kfree(hotk->name); | |
972 | kfree(hotk); | |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
977 | static void asus_backlight_exit(void) | |
978 | { | |
979 | if (asus_backlight_device) | |
980 | backlight_device_unregister(asus_backlight_device); | |
981 | } | |
982 | ||
983 | #define ASUS_LED_UNREGISTER(object) \ | |
984 | if(object##_led.class_dev \ | |
985 | && !IS_ERR(object##_led.class_dev)) \ | |
986 | led_classdev_unregister(&object##_led) | |
987 | ||
988 | static void asus_led_exit(void) | |
989 | { | |
990 | ASUS_LED_UNREGISTER(mled); | |
991 | ASUS_LED_UNREGISTER(tled); | |
992 | ASUS_LED_UNREGISTER(pled); | |
993 | ASUS_LED_UNREGISTER(rled); | |
994 | ||
995 | destroy_workqueue(led_workqueue); | |
996 | } | |
997 | ||
998 | static void __exit asus_laptop_exit(void) | |
999 | { | |
1000 | asus_backlight_exit(); | |
1001 | asus_led_exit(); | |
1002 | ||
1003 | acpi_bus_unregister_driver(&asus_hotk_driver); | |
1004 | sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group); | |
1005 | platform_device_unregister(asuspf_device); | |
1006 | platform_driver_unregister(&asuspf_driver); | |
1007 | } | |
1008 | ||
1009 | static int asus_backlight_init(struct device *dev) | |
1010 | { | |
1011 | struct backlight_device *bd; | |
1012 | ||
1013 | if (brightness_set_handle && lcd_switch_handle) { | |
1014 | bd = backlight_device_register(ASUS_HOTK_FILE, dev, | |
1015 | NULL, &asusbl_ops); | |
1016 | if (IS_ERR(bd)) { | |
1017 | printk(ASUS_ERR | |
1018 | "Could not register asus backlight device\n"); | |
1019 | asus_backlight_device = NULL; | |
1020 | return PTR_ERR(bd); | |
1021 | } | |
1022 | ||
1023 | asus_backlight_device = bd; | |
1024 | ||
1025 | bd->props.max_brightness = 15; | |
1026 | bd->props.brightness = read_brightness(NULL); | |
1027 | bd->props.power = FB_BLANK_UNBLANK; | |
1028 | backlight_update_status(bd); | |
1029 | } | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | static int asus_led_register(acpi_handle handle, | |
1034 | struct led_classdev *ldev, struct device *dev) | |
1035 | { | |
1036 | if (!handle) | |
1037 | return 0; | |
1038 | ||
1039 | return led_classdev_register(dev, ldev); | |
1040 | } | |
1041 | ||
1042 | #define ASUS_LED_REGISTER(object, device) \ | |
1043 | asus_led_register(object##_set_handle, &object##_led, device) | |
1044 | ||
1045 | static int asus_led_init(struct device *dev) | |
1046 | { | |
1047 | int rv; | |
1048 | ||
1049 | rv = ASUS_LED_REGISTER(mled, dev); | |
1050 | if (rv) | |
1051 | return rv; | |
1052 | ||
1053 | rv = ASUS_LED_REGISTER(tled, dev); | |
1054 | if (rv) | |
1055 | return rv; | |
1056 | ||
1057 | rv = ASUS_LED_REGISTER(rled, dev); | |
1058 | if (rv) | |
1059 | return rv; | |
1060 | ||
1061 | rv = ASUS_LED_REGISTER(pled, dev); | |
1062 | if (rv) | |
1063 | return rv; | |
1064 | ||
1065 | led_workqueue = create_singlethread_workqueue("led_workqueue"); | |
1066 | if (!led_workqueue) | |
1067 | return -ENOMEM; | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | static int __init asus_laptop_init(void) | |
1073 | { | |
1074 | struct device *dev; | |
1075 | int result; | |
1076 | ||
1077 | if (acpi_disabled) | |
1078 | return -ENODEV; | |
1079 | ||
1080 | result = acpi_bus_register_driver(&asus_hotk_driver); | |
1081 | if (result < 0) | |
1082 | return result; | |
1083 | ||
1084 | /* | |
1085 | * This is a bit of a kludge. We only want this module loaded | |
1086 | * for ASUS systems, but there's currently no way to probe the | |
1087 | * ACPI namespace for ASUS HIDs. So we just return failure if | |
1088 | * we didn't find one, which will cause the module to be | |
1089 | * unloaded. | |
1090 | */ | |
1091 | if (!asus_hotk_found) { | |
1092 | acpi_bus_unregister_driver(&asus_hotk_driver); | |
1093 | return -ENODEV; | |
1094 | } | |
1095 | ||
1096 | dev = acpi_get_physical_device(hotk->device->handle); | |
1097 | ||
1098 | result = asus_backlight_init(dev); | |
1099 | if (result) | |
1100 | goto fail_backlight; | |
1101 | ||
1102 | result = asus_led_init(dev); | |
1103 | if (result) | |
1104 | goto fail_led; | |
1105 | ||
1106 | /* Register platform stuff */ | |
1107 | result = platform_driver_register(&asuspf_driver); | |
1108 | if (result) | |
1109 | goto fail_platform_driver; | |
1110 | ||
1111 | asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1); | |
1112 | if (!asuspf_device) { | |
1113 | result = -ENOMEM; | |
1114 | goto fail_platform_device1; | |
1115 | } | |
1116 | ||
1117 | result = platform_device_add(asuspf_device); | |
1118 | if (result) | |
1119 | goto fail_platform_device2; | |
1120 | ||
1121 | result = sysfs_create_group(&asuspf_device->dev.kobj, | |
1122 | &asuspf_attribute_group); | |
1123 | if (result) | |
1124 | goto fail_sysfs; | |
1125 | ||
1126 | return 0; | |
1127 | ||
1128 | fail_sysfs: | |
1129 | platform_device_del(asuspf_device); | |
1130 | ||
1131 | fail_platform_device2: | |
1132 | platform_device_put(asuspf_device); | |
1133 | ||
1134 | fail_platform_device1: | |
1135 | platform_driver_unregister(&asuspf_driver); | |
1136 | ||
1137 | fail_platform_driver: | |
1138 | asus_led_exit(); | |
1139 | ||
1140 | fail_led: | |
1141 | asus_backlight_exit(); | |
1142 | ||
1143 | fail_backlight: | |
1144 | ||
1145 | return result; | |
1146 | } | |
1147 | ||
1148 | module_init(asus_laptop_init); | |
1149 | module_exit(asus_laptop_exit); |