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asus-laptop: add light sensor support
[deliverable/linux.git] / drivers / misc / asus-laptop.c
CommitLineData
85091b71
CC		 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>
6b7091e7
CC		 43#include <linux/backlight.h>
44#include <linux/fb.h>
be18cdab 45#include <linux/leds.h>
85091b71
CC		 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
6b7091e7
CC		 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
4564de17
CC		 68/*
69 * Known bits returned by \_SB.ATKD.HWRS
70 */
71#define WL_HWRS 0x80
72#define BT_HWRS 0x100
73
be18cdab
CC		 74/*
75 * Flags for hotk status
4564de17 76 * WL_ON and BT_ON are also used for wireless_status()
be18cdab 77 */
4564de17
CC		 78#define WL_ON 0x01 //internal Wifi
79#define BT_ON 0x02 //internal Bluetooth
be18cdab
CC		 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
6b7091e7 84#define LCD_ON 0x40 //LCD backlight
be18cdab 85
85091b71
CC		 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
93MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
94MODULE_DESCRIPTION(ASUS_HOTK_NAME);
95MODULE_LICENSE("GPL");
96
97#define ASUS_HANDLE(object, paths...) \
98 static acpi_handle object##_handle = NULL; \
99 static char *object##_paths[] = { paths }
100
be18cdab
CC		 101/* LED */
102ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED");
103ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED");
104ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */
105ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */
106
722ad971
CC		 107/* LEDD */
108ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM");
109
4564de17
CC		 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 */
114ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED");
115ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED");
116ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */
117
6b7091e7
CC		 118/* Brightness */
119ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV");
120ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV");
121
122/* Backlight */
123ASUS_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
78127b4a
CC		 131/* Display */
132ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP");
133ASUS_HANDLE(display_get,
134 "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G
135 M6A M6V VX-1 V6J V6V W3Z */
136 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V
137 S5A M5A z33A W1Jc W2V */
138 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */
139 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */
140 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */
141 "\\_SB.PCI0.VGA.GETD", /* Z96F */
142 "\\ACTD", /* A2D */
143 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
144 "\\DNXT", /* P30 */
145 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
146 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
147
8b857353
CC		 148ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */
149ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
150
85091b71
CC		 151/*
152 * This is the main structure, we can use it to store anything interesting
153 * about the hotk device
154 */
155struct asus_hotk {
156 char *name; //laptop name
157 struct acpi_device *device; //the device we are in
158 acpi_handle handle; //the handle of the hotk device
159 char status; //status of the hotk, for LEDs, ...
722ad971 160 u32 ledd_status; //status of the LED display
8b857353
CC		 161 u8 light_level; //light sensor level
162 u8 light_switch; //light sensor switch value
85091b71
CC		 163 u16 event_count[128]; //count for each event TODO make this better
164};
165
166/*
167 * This header is made available to allow proper configuration given model,
168 * revision number , ... this info cannot go in struct asus_hotk because it is
169 * available before the hotk
170 */
171static struct acpi_table_header *asus_info;
172
173/* The actual device the driver binds to */
174static struct asus_hotk *hotk;
175
176/*
177 * The hotkey driver declaration
178 */
179static int asus_hotk_add(struct acpi_device *device);
180static int asus_hotk_remove(struct acpi_device *device, int type);
181static struct acpi_driver asus_hotk_driver = {
182 .name = ASUS_HOTK_NAME,
183 .class = ASUS_HOTK_CLASS,
184 .ids = ASUS_HOTK_HID,
185 .ops = {
186 .add = asus_hotk_add,
187 .remove = asus_hotk_remove,
188 },
189};
190
6b7091e7
CC		 191/* The backlight device /sys/class/backlight */
192static struct backlight_device *asus_backlight_device;
193
194/*
195 * The backlight class declaration
196 */
197static int read_brightness(struct backlight_device *bd);
198static int update_bl_status(struct backlight_device *bd);
199static struct backlight_properties asusbl_data = {
200 .owner = THIS_MODULE,
201 .get_brightness = read_brightness,
202 .update_status = update_bl_status,
203 .max_brightness = 15,
204};
205
be18cdab
CC		 206/* These functions actually update the LED's, and are called from a
207 * workqueue. By doing this as separate work rather than when the LED
208 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
209 * potentially bad time, such as a timer interrupt. */
210static struct workqueue_struct *led_workqueue;
211
212#define ASUS_LED(object, ledname) \
213 static void object##_led_set(struct led_classdev *led_cdev, \
214 enum led_brightness value); \
215 static void object##_led_update(struct work_struct *ignored); \
216 static int object##_led_wk; \
217 DECLARE_WORK(object##_led_work, object##_led_update); \
218 static struct led_classdev object##_led = { \
219 .name = "asus:" ledname, \
220 .brightness_set = object##_led_set, \
221 }
222
223ASUS_LED(mled, "mail");
224ASUS_LED(tled, "touchpad");
225ASUS_LED(rled, "record");
226ASUS_LED(pled, "phone");
227
85091b71
CC		 228/*
229 * This function evaluates an ACPI method, given an int as parameter, the
230 * method is searched within the scope of the handle, can be NULL. The output
231 * of the method is written is output, which can also be NULL
232 *
233 * returns 1 if write is successful, 0 else.
234 */
235static int write_acpi_int(acpi_handle handle, const char *method, int val,
236 struct acpi_buffer *output)
237{
238 struct acpi_object_list params; //list of input parameters (an int here)
239 union acpi_object in_obj; //the only param we use
240 acpi_status status;
241
242 params.count = 1;
243 params.pointer = &in_obj;
244 in_obj.type = ACPI_TYPE_INTEGER;
245 in_obj.integer.value = val;
246
247 status = acpi_evaluate_object(handle, (char *)method, &params, output);
248 return (status == AE_OK);
249}
250
251static int read_acpi_int(acpi_handle handle, const char *method, int *val,
252 struct acpi_object_list *params)
253{
254 struct acpi_buffer output;
255 union acpi_object out_obj;
256 acpi_status status;
257
258 output.length = sizeof(out_obj);
259 output.pointer = &out_obj;
260
261 status = acpi_evaluate_object(handle, (char *)method, params, &output);
262 *val = out_obj.integer.value;
263 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
264}
265
4564de17
CC		 266static int read_wireless_status(int mask) {
267 int status;
268
269 if (!wireless_status_handle)
270 return (hotk->status & mask) ? 1 : 0;
271
272 if (read_acpi_int(wireless_status_handle, NULL, &status, NULL)) {
273 return (status & mask) ? 1 : 0;
274 } else
275 printk(ASUS_WARNING "Error reading Wireless status\n");
276
277 return (hotk->status & mask) ? 1 : 0;
278}
279
be18cdab
CC		 280/* Generic LED functions */
281static int read_status(int mask)
282{
4564de17
CC		 283 /* There is a special method for both wireless devices */
284 if (mask == BT_ON || mask == WL_ON)
285 return read_wireless_status(mask);
286
be18cdab
CC		 287 return (hotk->status & mask) ? 1 : 0;
288}
289
290static void write_status(acpi_handle handle, int out, int mask,
4564de17 291 int invert)
be18cdab
CC		 292{
293 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
294
295 if (invert) /* invert target value */
296 out = !out & 0x1;
297
298 if (handle && !write_acpi_int(handle, NULL, out, NULL))
299 printk(ASUS_WARNING " write failed\n");
300}
301
302/* /sys/class/led handlers */
303#define ASUS_LED_HANDLER(object, mask, invert) \
304 static void object##_led_set(struct led_classdev *led_cdev, \
305 enum led_brightness value) \
306 { \
307 object##_led_wk = value; \
308 queue_work(led_workqueue, &object##_led_work); \
309 } \
310 static void object##_led_update(struct work_struct *ignored) \
311 { \
312 int value = object##_led_wk; \
313 write_status(object##_set_handle, value, (mask), (invert)); \
314 }
315
316ASUS_LED_HANDLER(mled, MLED_ON, 1);
317ASUS_LED_HANDLER(pled, PLED_ON, 0);
318ASUS_LED_HANDLER(rled, RLED_ON, 0);
319ASUS_LED_HANDLER(tled, TLED_ON, 0);
320
6b7091e7
CC		 321static int get_lcd_state(void)
322{
323 return read_status(LCD_ON);
324}
325
326static int set_lcd_state(int value)
327{
328 int lcd = 0;
329 acpi_status status = 0;
330
331 lcd = value ? 1 : 0;
332
333 if (lcd == get_lcd_state())
334 return 0;
335
336 if(lcd_switch_handle) {
337 status = acpi_evaluate_object(lcd_switch_handle,
338 NULL, NULL, NULL);
339
340 if (ACPI_FAILURE(status))
341 printk(ASUS_WARNING "Error switching LCD\n");
342 }
343
344 write_status(NULL, lcd, LCD_ON, 0);
345 return 0;
346}
347
348static void lcd_blank(int blank)
349{
350 struct backlight_device *bd = asus_backlight_device;
351
352 if(bd) {
353 down(&bd->sem);
354 if(likely(bd->props)) {
355 bd->props->power = blank;
356 if(likely(bd->props->update_status))
357 bd->props->update_status(bd);
358 }
359 up(&bd->sem);
360 }
361}
362
363static int read_brightness(struct backlight_device *bd)
364{
365 int value;
366
367 if (!read_acpi_int(brightness_get_handle, NULL, &value, NULL))
368 printk(ASUS_WARNING "Error reading brightness\n");
369
370 return value;
371}
372
373static int set_brightness(struct backlight_device *bd, int value)
374{
375 int ret = 0;
376
377 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
378 /* 0 <= value <= 15 */
379
380 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
381 printk(ASUS_WARNING "Error changing brightness\n");
382 ret = -EIO;
383 }
384
385 return ret;
386}
387
388static int update_bl_status(struct backlight_device *bd)
389{
390 int rv;
391 int value = bd->props->brightness;
392
393 rv = set_brightness(bd, value);
394 if(rv)
395 return rv;
396
397 value = (bd->props->power == FB_BLANK_UNBLANK) ? 1 : 0;
398 return set_lcd_state(value);
399}
400
85091b71
CC		 401/*
402 * Platform device handlers
403 */
404
405/*
406 * We write our info in page, we begin at offset off and cannot write more
407 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
408 * number of bytes written in page
409 */
410static ssize_t show_infos(struct device *dev,
411 struct device_attribute *attr, char *page)
412{
413 int len = 0;
414 int temp;
415 char buf[16]; //enough for all info
416 /*
417 * We use the easy way, we don't care of off and count, so we don't set eof
418 * to 1
419 */
420
421 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
422 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
423 /*
424 * The SFUN method probably allows the original driver to get the list
425 * of features supported by a given model. For now, 0x0100 or 0x0800
426 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
427 * The significance of others is yet to be found.
428 */
429 if (read_acpi_int(hotk->handle, "SFUN", &temp, NULL))
430 len +=
431 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
432 /*
433 * Another value for userspace: the ASYM method returns 0x02 for
434 * battery low and 0x04 for battery critical, its readings tend to be
435 * more accurate than those provided by _BST.
436 * Note: since not all the laptops provide this method, errors are
437 * silently ignored.
438 */
439 if (read_acpi_int(hotk->handle, "ASYM", &temp, NULL))
440 len +=
441 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
442 if (asus_info) {
443 snprintf(buf, 16, "%d", asus_info->length);
444 len += sprintf(page + len, "DSDT length : %s\n", buf);
445 snprintf(buf, 16, "%d", asus_info->checksum);
446 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
447 snprintf(buf, 16, "%d", asus_info->revision);
448 len += sprintf(page + len, "DSDT revision : %s\n", buf);
449 snprintf(buf, 7, "%s", asus_info->oem_id);
450 len += sprintf(page + len, "OEM id : %s\n", buf);
451 snprintf(buf, 9, "%s", asus_info->oem_table_id);
452 len += sprintf(page + len, "OEM table id : %s\n", buf);
453 snprintf(buf, 16, "%x", asus_info->oem_revision);
454 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
455 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
456 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
457 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
458 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
459 }
460
461 return len;
462}
463
464static int parse_arg(const char *buf, unsigned long count, int *val)
465{
466 if (!count)
467 return 0;
468 if (count > 31)
469 return -EINVAL;
470 if (sscanf(buf, "%i", val) != 1)
471 return -EINVAL;
472 return count;
473}
474
4564de17
CC		 475static ssize_t store_status(const char *buf, size_t count,
476 acpi_handle handle, int mask, int invert)
477{
478 int rv, value;
479 int out = 0;
480
481 rv = parse_arg(buf, count, &value);
482 if (rv > 0)
483 out = value ? 1 : 0;
484
485 write_status(handle, out, mask, invert);
486
487 return rv;
488}
489
722ad971
CC		 490/*
491 * LEDD display
492 */
493static ssize_t show_ledd(struct device *dev,
494 struct device_attribute *attr, char *buf)
495{
496 return sprintf(buf, "0x%08x\n", hotk->ledd_status);
497}
498
499static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
500 const char *buf, size_t count)
501{
502 int rv, value;
503
504 rv = parse_arg(buf, count, &value);
505 if (rv > 0) {
506 if (!write_acpi_int(ledd_set_handle, NULL, value, NULL))
507 printk(ASUS_WARNING "LED display write failed\n");
508 else
509 hotk->ledd_status = (u32) value;
510 }
511 return rv;
512}
513
4564de17
CC		 514/*
515 * WLAN
516 */
517static ssize_t show_wlan(struct device *dev,
518 struct device_attribute *attr, char *buf)
519{
520 return sprintf(buf, "%d\n", read_status(WL_ON));
521}
522
523static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
524 const char *buf, size_t count)
525{
526 return store_status(buf, count, wl_switch_handle, WL_ON, 0);
527}
528
529/*
530 * Bluetooth
531 */
532static ssize_t show_bluetooth(struct device *dev,
533 struct device_attribute *attr, char *buf)
534{
535 return sprintf(buf, "%d\n", read_status(BT_ON));
536}
537
538static ssize_t store_bluetooth(struct device *dev, struct device_attribute *attr,
539 const char *buf, size_t count)
540{
541 return store_status(buf, count, bt_switch_handle, BT_ON, 0);
542}
543
78127b4a
CC		 544/*
545 * Display
546 */
547static void set_display(int value)
548{
549 /* no sanity check needed for now */
550 if (!write_acpi_int(display_set_handle, NULL, value, NULL))
551 printk(ASUS_WARNING "Error setting display\n");
552 return;
553}
554
555static int read_display(void)
556{
557 int value = 0;
558
559 /* In most of the case, we know how to set the display, but sometime
560 we can't read it */
561 if(display_get_handle) {
562 if (!read_acpi_int(display_get_handle, NULL, &value, NULL))
563 printk(ASUS_WARNING "Error reading display status\n");
564 }
565
566 value &= 0x0F; /* needed for some models, shouldn't hurt others */
567
568 return value;
569}
570/*
571 * Now, *this* one could be more user-friendly, but so far, no-one has
572 * complained. The significance of bits is the same as in store_disp()
573 */
574static ssize_t show_disp(struct device *dev,
575 struct device_attribute *attr, char *buf)
576{
577 return sprintf(buf, "%d\n", read_display());
578}
579
580/*
581 * Experimental support for display switching. As of now: 1 should activate
582 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
583 * Any combination (bitwise) of these will suffice. I never actually tested 4
584 * displays hooked up simultaneously, so be warned. See the acpi4asus README
585 * for more info.
586 */
587static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
588 const char *buf, size_t count)
589{
590 int rv, value;
591
592 rv = parse_arg(buf, count, &value);
593 if (rv > 0)
594 set_display(value);
595 return rv;
596}
597
8b857353
CC		 598/*
599 * Light Sens
600 */
601static void set_light_sens_switch(int value)
602{
603 if (!write_acpi_int(ls_switch_handle, NULL, value, NULL))
604 printk(ASUS_WARNING "Error setting light sensor switch\n");
605 hotk->light_switch = value;
606}
607
608static ssize_t show_lssw(struct device *dev,
609 struct device_attribute *attr, char *buf)
610{
611 return sprintf(buf, "%d\n", hotk->light_switch);
612}
613
614static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
615 const char *buf, size_t count)
616{
617 int rv, value;
618
619 rv = parse_arg(buf, count, &value);
620 if (rv > 0)
621 set_light_sens_switch(value ? 1 : 0);
622
623 return rv;
624}
625
626static void set_light_sens_level(int value)
627{
628 if (!write_acpi_int(ls_level_handle, NULL, value, NULL))
629 printk(ASUS_WARNING "Error setting light sensor level\n");
630 hotk->light_level = value;
631}
632
633static ssize_t show_lslvl(struct device *dev,
634 struct device_attribute *attr, char *buf)
635{
636 return sprintf(buf, "%d\n", hotk->light_level);
637}
638
639static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
640 const char *buf, size_t count)
641{
642 int rv, value;
643
644 rv = parse_arg(buf, count, &value);
645 if (rv > 0) {
646 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
647 /* 0 <= value <= 15 */
648 set_light_sens_level(value);
649 }
650
651 return rv;
652}
653
85091b71
CC		 654static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
655{
656 /* TODO Find a better way to handle events count. */
657 if (!hotk)
658 return;
659
6b7091e7
CC		 660 /*
661 * We need to tell the backlight device when the backlight power is
662 * switched
663 */
664 if (event == ATKD_LCD_ON) {
665 write_status(NULL, 1, LCD_ON, 0);
666 lcd_blank(FB_BLANK_UNBLANK);
667 } else if(event == ATKD_LCD_OFF) {
668 write_status(NULL, 0, LCD_ON, 0);
669 lcd_blank(FB_BLANK_POWERDOWN);
670 }
671
85091b71
CC		 672 acpi_bus_generate_event(hotk->device, event,
673 hotk->event_count[event % 128]++);
674
675 return;
676}
677
678#define ASUS_CREATE_DEVICE_ATTR(_name) \
679 struct device_attribute dev_attr_##_name = { \
680 .attr = { \
681 .name = __stringify(_name), \
682 .mode = 0, \
683 .owner = THIS_MODULE }, \
684 .show = NULL, \
685 .store = NULL, \
686 }
687
688#define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
689 do { \
690 dev_attr_##_name.attr.mode = _mode; \
691 dev_attr_##_name.show = _show; \
692 dev_attr_##_name.store = _store; \
693 } while(0)
694
695static ASUS_CREATE_DEVICE_ATTR(infos);
4564de17
CC		 696static ASUS_CREATE_DEVICE_ATTR(wlan);
697static ASUS_CREATE_DEVICE_ATTR(bluetooth);
78127b4a 698static ASUS_CREATE_DEVICE_ATTR(display);
722ad971 699static ASUS_CREATE_DEVICE_ATTR(ledd);
8b857353
CC		 700static ASUS_CREATE_DEVICE_ATTR(ls_switch);
701static ASUS_CREATE_DEVICE_ATTR(ls_level);
85091b71
CC		 702
703static struct attribute *asuspf_attributes[] = {
704 &dev_attr_infos.attr,
4564de17
CC		 705 &dev_attr_wlan.attr,
706 &dev_attr_bluetooth.attr,
78127b4a 707 &dev_attr_display.attr,
722ad971 708 &dev_attr_ledd.attr,
8b857353
CC		 709 &dev_attr_ls_switch.attr,
710 &dev_attr_ls_level.attr,
85091b71
CC		 711 NULL
712};
713
714static struct attribute_group asuspf_attribute_group = {
715 .attrs = asuspf_attributes
716};
717
718static struct platform_driver asuspf_driver = {
719 .driver = {
720 .name = ASUS_HOTK_FILE,
721 .owner = THIS_MODULE,
722 }
723};
724
725static struct platform_device *asuspf_device;
726
727
728static void asus_hotk_add_fs(void)
729{
730 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
4564de17
CC		 731
732 if (wl_switch_handle)
733 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
734
735 if (bt_switch_handle)
736 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
737 show_bluetooth, store_bluetooth);
78127b4a
CC		 738
739 if (display_set_handle && display_get_handle)
740 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
741 else if(display_set_handle)
742 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
743
722ad971
CC		 744 if (ledd_set_handle)
745 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);
746
8b857353
CC		 747 if (ls_switch_handle && ls_level_handle) {
748 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
749 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
750 }
85091b71
CC		 751}
752
753static int asus_handle_init(char *name, acpi_handle *handle,
754 char **paths, int num_paths)
755{
756 int i;
757 acpi_status status;
758
759 for (i = 0; i < num_paths; i++) {
760 status = acpi_get_handle(NULL, paths[i], handle);
761 if (ACPI_SUCCESS(status))
762 return 0;
763 }
764
765 *handle = NULL;
766 return -ENODEV;
767}
768
769#define ASUS_HANDLE_INIT(object) \
770 asus_handle_init(#object, &object##_handle, object##_paths, \
771 ARRAY_SIZE(object##_paths))
772
773
774/*
775 * This function is used to initialize the hotk with right values. In this
776 * method, we can make all the detection we want, and modify the hotk struct
777 */
778static int asus_hotk_get_info(void)
779{
780 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
781 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
782 union acpi_object *model = NULL;
4564de17 783 int bsts_result, hwrs_result;
85091b71
CC		 784 char *string = NULL;
785 acpi_status status;
786
787 /*
788 * Get DSDT headers early enough to allow for differentiating between
789 * models, but late enough to allow acpi_bus_register_driver() to fail
790 * before doing anything ACPI-specific. Should we encounter a machine,
791 * which needs special handling (i.e. its hotkey device has a different
792 * HID), this bit will be moved. A global variable asus_info contains
793 * the DSDT header.
794 */
795 status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
796 if (ACPI_FAILURE(status))
797 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
798 else
799 asus_info = dsdt.pointer;
800
801 /* We have to write 0 on init this far for all ASUS models */
802 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
803 printk(ASUS_ERR "Hotkey initialization failed\n");
804 return -ENODEV;
805 }
806
807 /* This needs to be called for some laptops to init properly */
808 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result, NULL))
809 printk(ASUS_WARNING "Error calling BSTS\n");
810 else if (bsts_result)
811 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
812 bsts_result);
813
814 /*
815 * Try to match the object returned by INIT to the specific model.
816 * Handle every possible object (or the lack of thereof) the DSDT
817 * writers might throw at us. When in trouble, we pass NULL to
818 * asus_model_match() and try something completely different.
819 */
820 if (buffer.pointer) {
821 model = buffer.pointer;
822 switch (model->type) {
823 case ACPI_TYPE_STRING:
824 string = model->string.pointer;
825 break;
826 case ACPI_TYPE_BUFFER:
827 string = model->buffer.pointer;
828 break;
829 default:
830 string = "";
831 break;
832 }
833 }
834 hotk->name = kstrdup(string, GFP_KERNEL);
835 if (!hotk->name)
836 return -ENOMEM;
837
838 if(*string)
839 printk(ASUS_NOTICE " %s model detected\n", string);
840
be18cdab
CC		 841 ASUS_HANDLE_INIT(mled_set);
842 ASUS_HANDLE_INIT(tled_set);
843 ASUS_HANDLE_INIT(rled_set);
844 ASUS_HANDLE_INIT(pled_set);
845
722ad971
CC		 846 ASUS_HANDLE_INIT(ledd_set);
847
4564de17
CC		 848 /*
849 * The HWRS method return informations about the hardware.
850 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
851 * The significance of others is yet to be found.
852 * If we don't find the method, we assume the device are present.
853 */
854 if (!read_acpi_int(hotk->handle, "HRWS", &hwrs_result, NULL))
855 hwrs_result = WL_HWRS | BT_HWRS;
856
857 if(hwrs_result & WL_HWRS)
858 ASUS_HANDLE_INIT(wl_switch);
859 if(hwrs_result & BT_HWRS)
860 ASUS_HANDLE_INIT(bt_switch);
861
862 ASUS_HANDLE_INIT(wireless_status);
863
6b7091e7
CC		 864 ASUS_HANDLE_INIT(brightness_set);
865 ASUS_HANDLE_INIT(brightness_get);
866
867 ASUS_HANDLE_INIT(lcd_switch);
868
78127b4a
CC		 869 ASUS_HANDLE_INIT(display_set);
870 ASUS_HANDLE_INIT(display_get);
871
8b857353
CC		 872 /* There is a lot of models with "ALSL", but a few get
873 a real light sens, so we need to check it. */
874 if(ASUS_HANDLE_INIT(ls_switch))
875 ASUS_HANDLE_INIT(ls_level);
876
85091b71
CC		 877 kfree(model);
878
879 return AE_OK;
880}
881
882static int asus_hotk_check(void)
883{
884 int result = 0;
885
886 result = acpi_bus_get_status(hotk->device);
887 if (result)
888 return result;
889
890 if (hotk->device->status.present) {
891 result = asus_hotk_get_info();
892 } else {
893 printk(ASUS_ERR "Hotkey device not present, aborting\n");
894 return -EINVAL;
895 }
896
897 return result;
898}
899
900static int asus_hotk_found;
901
902static int asus_hotk_add(struct acpi_device *device)
903{
904 acpi_status status = AE_OK;
905 int result;
906
907 if (!device)
908 return -EINVAL;
909
910 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
911 ASUS_LAPTOP_VERSION);
912
913 hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
914 if (!hotk)
915 return -ENOMEM;
916 memset(hotk, 0, sizeof(struct asus_hotk));
917
918 hotk->handle = device->handle;
919 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
920 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
921 acpi_driver_data(device) = hotk;
922 hotk->device = device;
923
924 result = asus_hotk_check();
925 if (result)
926 goto end;
927
928 asus_hotk_add_fs();
929
930 /*
931 * We install the handler, it will receive the hotk in parameter, so, we
932 * could add other data to the hotk struct
933 */
934 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
935 asus_hotk_notify, hotk);
936 if (ACPI_FAILURE(status))
937 printk(ASUS_ERR "Error installing notify handler\n");
938
939 asus_hotk_found = 1;
940
6b7091e7 941 /* WLED and BLED are on by default */
4564de17
CC		 942 write_status(bt_switch_handle, 1, BT_ON, 0);
943 write_status(wl_switch_handle, 1, WL_ON, 0);
944
6b7091e7
CC		 945 /* LCD Backlight is on by default */
946 write_status(NULL, 1, LCD_ON, 0);
947
722ad971
CC		 948 /* LED display is off by default */
949 hotk->ledd_status = 0xFFF;
950
8b857353
CC		 951 /* Set initial values of light sensor and level */
952 hotk->light_switch = 1; /* Default to light sensor disabled */
953 hotk->light_level = 0; /* level 5 for sensor sensitivity */
954
955 if (ls_switch_handle)
956 set_light_sens_switch(hotk->light_switch);
957
958 if (ls_level_handle)
959 set_light_sens_level(hotk->light_level);
960
85091b71
CC		 961 end:
962 if (result) {
963 kfree(hotk->name);
964 kfree(hotk);
965 }
966
967 return result;
968}
969
970static int asus_hotk_remove(struct acpi_device *device, int type)
971{
972 acpi_status status = 0;
973
974 if (!device || !acpi_driver_data(device))
975 return -EINVAL;
976
977 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
978 asus_hotk_notify);
979 if (ACPI_FAILURE(status))
980 printk(ASUS_ERR "Error removing notify handler\n");
981
982 kfree(hotk->name);
983 kfree(hotk);
984
985 return 0;
986}
987
6b7091e7
CC		 988static void asus_backlight_exit(void)
989{
990 if(asus_backlight_device)
991 backlight_device_unregister(asus_backlight_device);
992}
993
be18cdab
CC		 994#define ASUS_LED_UNREGISTER(object) \
995 if(object##_led.class_dev \
996 && !IS_ERR(object##_led.class_dev)) \
997 led_classdev_unregister(&object##_led)
998
999static void asus_led_exit(void)
1000{
1001 ASUS_LED_UNREGISTER(mled);
1002 ASUS_LED_UNREGISTER(tled);
1003 ASUS_LED_UNREGISTER(pled);
1004 ASUS_LED_UNREGISTER(rled);
1005
1006 destroy_workqueue(led_workqueue);
1007}
1008
85091b71
CC		 1009static void __exit asus_laptop_exit(void)
1010{
6b7091e7 1011 asus_backlight_exit();
be18cdab
CC		 1012 asus_led_exit();
1013
85091b71
CC		 1014 acpi_bus_unregister_driver(&asus_hotk_driver);
1015 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
1016 platform_device_unregister(asuspf_device);
1017 platform_driver_unregister(&asuspf_driver);
1018
1019 kfree(asus_info);
1020}
1021
6b7091e7
CC		 1022static int asus_backlight_init(struct device * dev)
1023{
1024 struct backlight_device *bd;
1025
1026 if(brightness_set_handle && lcd_switch_handle) {
1027 bd = backlight_device_register (ASUS_HOTK_FILE, dev,
1028 NULL, &asusbl_data);
1029 if (IS_ERR (bd)) {
1030 printk(ASUS_ERR
1031 "Could not register asus backlight device\n");
1032 asus_backlight_device = NULL;
1033 return PTR_ERR(bd);
1034 }
1035
1036 asus_backlight_device = bd;
1037
1038 down(&bd->sem);
1039 if(likely(bd->props)) {
1040 bd->props->brightness = read_brightness(NULL);
1041 bd->props->power = FB_BLANK_UNBLANK;
1042 if(likely(bd->props->update_status))
1043 bd->props->update_status(bd);
1044 }
1045 up(&bd->sem);
1046 }
1047 return 0;
1048}
1049
be18cdab
CC		 1050static int asus_led_register(acpi_handle handle,
1051 struct led_classdev * ldev,
1052 struct device * dev)
1053{
1054 if(!handle)
1055 return 0;
1056
1057 return led_classdev_register(dev, ldev);
1058}
1059#define ASUS_LED_REGISTER(object, device) \
1060 asus_led_register(object##_set_handle, &object##_led, device)
1061
1062static int asus_led_init(struct device * dev)
1063{
1064 int rv;
1065
1066 rv = ASUS_LED_REGISTER(mled, dev);
1067 if(rv)
1068 return rv;
1069
1070 rv = ASUS_LED_REGISTER(tled, dev);
1071 if(rv)
1072 return rv;
1073
1074 rv = ASUS_LED_REGISTER(rled, dev);
1075 if(rv)
1076 return rv;
1077
1078 rv = ASUS_LED_REGISTER(pled, dev);
1079 if(rv)
1080 return rv;
1081
1082 led_workqueue = create_singlethread_workqueue("led_workqueue");
1083 if(!led_workqueue)
1084 return -ENOMEM;
1085
1086 return 0;
1087}
1088
85091b71
CC		 1089static int __init asus_laptop_init(void)
1090{
be18cdab 1091 struct device *dev;
85091b71
CC		 1092 int result;
1093
1094 if (acpi_disabled)
1095 return -ENODEV;
1096
1097 if (!acpi_specific_hotkey_enabled) {
1098 printk(ASUS_ERR "Using generic hotkey driver\n");
1099 return -ENODEV;
1100 }
1101
1102 result = acpi_bus_register_driver(&asus_hotk_driver);
1103 if (result < 0)
1104 return result;
1105
1106 /*
1107 * This is a bit of a kludge. We only want this module loaded
1108 * for ASUS systems, but there's currently no way to probe the
1109 * ACPI namespace for ASUS HIDs. So we just return failure if
1110 * we didn't find one, which will cause the module to be
1111 * unloaded.
1112 */
1113 if (!asus_hotk_found) {
1114 acpi_bus_unregister_driver(&asus_hotk_driver);
1115 return -ENODEV;
1116 }
1117
be18cdab
CC		 1118 dev = acpi_get_physical_device(hotk->device->handle);
1119
6b7091e7
CC		 1120 result = asus_backlight_init(dev);
1121 if(result)
1122 goto fail_backlight;
1123
be18cdab
CC		 1124 result = asus_led_init(dev);
1125 if(result)
1126 goto fail_led;
1127
85091b71
CC		 1128 /* Register platform stuff */
1129 result = platform_driver_register(&asuspf_driver);
1130 if (result)
1131 goto fail_platform_driver;
1132
1133 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
1134 if (!asuspf_device) {
1135 result = -ENOMEM;
1136 goto fail_platform_device1;
1137 }
1138
1139 result = platform_device_add(asuspf_device);
1140 if (result)
1141 goto fail_platform_device2;
1142
1143 result = sysfs_create_group(&asuspf_device->dev.kobj,
1144 &asuspf_attribute_group);
1145 if (result)
1146 goto fail_sysfs;
1147
1148 return 0;
1149
1150fail_sysfs:
1151 platform_device_del(asuspf_device);
1152
1153fail_platform_device2:
1154 platform_device_put(asuspf_device);
1155
1156fail_platform_device1:
1157 platform_driver_unregister(&asuspf_driver);
1158
1159fail_platform_driver:
be18cdab
CC		 1160 asus_led_exit();
1161
1162fail_led:
6b7091e7
CC		 1163 asus_backlight_exit();
1164
1165fail_backlight:
85091b71
CC		 1166
1167 return result;
1168}
1169
1170module_init(asus_laptop_init);
1171module_exit(asus_laptop_exit);
Linux kernel - Deliverables
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