2 * asus-laptop.c - Asus Laptop Support
5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
6 * Copyright (C) 2006 Corentin Chary
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.
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.
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
23 * The development page for this driver is located at
24 * http://sourceforge.net/projects/acpi4asus/
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
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>
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>
51 #define ASUS_LAPTOP_VERSION "0.40"
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."
61 * Some events we use, same for all Asus
63 #define ATKD_BR_UP 0x10
64 #define ATKD_BR_DOWN 0x20
65 #define ATKD_LCD_ON 0x33
66 #define ATKD_LCD_OFF 0x34
69 * Known bits returned by \_SB.ATKD.HWRS
75 * Flags for hotk status
76 * WL_ON and BT_ON are also used for wireless_status()
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
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
93 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
94 MODULE_DESCRIPTION(ASUS_HOTK_NAME
);
95 MODULE_LICENSE("GPL");
97 #define ASUS_HANDLE(object, paths...) \
98 static acpi_handle object##_handle = NULL; \
99 static char *object##_paths[] = { paths }
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 */
108 ASUS_HANDLE(ledd_set
, ASUS_HOTK_PREFIX
"SLCM");
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.
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 */
119 ASUS_HANDLE(brightness_set
, ASUS_HOTK_PREFIX
"SPLV");
120 ASUS_HANDLE(brightness_get
, ASUS_HOTK_PREFIX
"GPLV");
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 */
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 */
142 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
144 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
145 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
147 ASUS_HANDLE(ls_switch
, ASUS_HOTK_PREFIX
"ALSC"); /* Z71A Z71V */
148 ASUS_HANDLE(ls_level
, ASUS_HOTK_PREFIX
"ALSL"); /* Z71A Z71V */
151 * This is the main structure, we can use it to store anything interesting
152 * about the hotk device
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
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
170 static struct acpi_table_header
*asus_info
;
172 /* The actual device the driver binds to */
173 static struct asus_hotk
*hotk
;
176 * The hotkey driver declaration
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
,
185 .add
= asus_hotk_add
,
186 .remove
= asus_hotk_remove
,
190 /* The backlight device /sys/class/backlight */
191 static struct backlight_device
*asus_backlight_device
;
194 * The backlight class declaration
196 static int read_brightness(struct backlight_device
*bd
);
197 static int update_bl_status(struct backlight_device
*bd
);
198 static struct backlight_properties asusbl_data
= {
199 .owner
= THIS_MODULE
,
200 .get_brightness
= read_brightness
,
201 .update_status
= update_bl_status
,
202 .max_brightness
= 15,
205 /* These functions actually update the LED's, and are called from a
206 * workqueue. By doing this as separate work rather than when the LED
207 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
208 * potentially bad time, such as a timer interrupt. */
209 static struct workqueue_struct
*led_workqueue
;
211 #define ASUS_LED(object, ledname) \
212 static void object##_led_set(struct led_classdev *led_cdev, \
213 enum led_brightness value); \
214 static void object##_led_update(struct work_struct *ignored); \
215 static int object##_led_wk; \
216 DECLARE_WORK(object##_led_work, object##_led_update); \
217 static struct led_classdev object##_led = { \
218 .name = "asus:" ledname, \
219 .brightness_set = object##_led_set, \
222 ASUS_LED(mled
, "mail");
223 ASUS_LED(tled
, "touchpad");
224 ASUS_LED(rled
, "record");
225 ASUS_LED(pled
, "phone");
228 * This function evaluates an ACPI method, given an int as parameter, the
229 * method is searched within the scope of the handle, can be NULL. The output
230 * of the method is written is output, which can also be NULL
232 * returns 1 if write is successful, 0 else.
234 static int write_acpi_int(acpi_handle handle
, const char *method
, int val
,
235 struct acpi_buffer
*output
)
237 struct acpi_object_list params
; //list of input parameters (an int here)
238 union acpi_object in_obj
; //the only param we use
242 params
.pointer
= &in_obj
;
243 in_obj
.type
= ACPI_TYPE_INTEGER
;
244 in_obj
.integer
.value
= val
;
246 status
= acpi_evaluate_object(handle
, (char *)method
, ¶ms
, output
);
247 return (status
== AE_OK
);
250 static int read_acpi_int(acpi_handle handle
, const char *method
, int *val
,
251 struct acpi_object_list
*params
)
253 struct acpi_buffer output
;
254 union acpi_object out_obj
;
257 output
.length
= sizeof(out_obj
);
258 output
.pointer
= &out_obj
;
260 status
= acpi_evaluate_object(handle
, (char *)method
, params
, &output
);
261 *val
= out_obj
.integer
.value
;
262 return (status
== AE_OK
) && (out_obj
.type
== ACPI_TYPE_INTEGER
);
265 static int read_wireless_status(int mask
)
269 if (!wireless_status_handle
)
270 return (hotk
->status
& mask
) ? 1 : 0;
272 if (read_acpi_int(wireless_status_handle
, NULL
, &status
, NULL
)) {
273 return (status
& mask
) ? 1 : 0;
275 printk(ASUS_WARNING
"Error reading Wireless status\n");
277 return (hotk
->status
& mask
) ? 1 : 0;
280 /* Generic LED functions */
281 static int read_status(int mask
)
283 /* There is a special method for both wireless devices */
284 if (mask
== BT_ON
|| mask
== WL_ON
)
285 return read_wireless_status(mask
);
287 return (hotk
->status
& mask
) ? 1 : 0;
290 static void write_status(acpi_handle handle
, int out
, int mask
, int invert
)
292 hotk
->status
= (out
) ? (hotk
->status
| mask
) : (hotk
->status
& ~mask
);
294 if (invert
) /* invert target value */
297 if (handle
&& !write_acpi_int(handle
, NULL
, out
, NULL
))
298 printk(ASUS_WARNING
" write failed\n");
301 /* /sys/class/led handlers */
302 #define ASUS_LED_HANDLER(object, mask, invert) \
303 static void object##_led_set(struct led_classdev *led_cdev, \
304 enum led_brightness value) \
306 object##_led_wk = value; \
307 queue_work(led_workqueue, &object##_led_work); \
309 static void object##_led_update(struct work_struct *ignored) \
311 int value = object##_led_wk; \
312 write_status(object##_set_handle, value, (mask), (invert)); \
315 ASUS_LED_HANDLER(mled
, MLED_ON
, 1);
316 ASUS_LED_HANDLER(pled
, PLED_ON
, 0);
317 ASUS_LED_HANDLER(rled
, RLED_ON
, 0);
318 ASUS_LED_HANDLER(tled
, TLED_ON
, 0);
320 static int get_lcd_state(void)
322 return read_status(LCD_ON
);
325 static int set_lcd_state(int value
)
328 acpi_status status
= 0;
332 if (lcd
== get_lcd_state())
335 if (lcd_switch_handle
) {
336 status
= acpi_evaluate_object(lcd_switch_handle
,
339 if (ACPI_FAILURE(status
))
340 printk(ASUS_WARNING
"Error switching LCD\n");
343 write_status(NULL
, lcd
, LCD_ON
, 0);
347 static void lcd_blank(int blank
)
349 struct backlight_device
*bd
= asus_backlight_device
;
353 if (likely(bd
->props
)) {
354 bd
->props
->power
= blank
;
355 if (likely(bd
->props
->update_status
))
356 bd
->props
->update_status(bd
);
362 static int read_brightness(struct backlight_device
*bd
)
366 if (!read_acpi_int(brightness_get_handle
, NULL
, &value
, NULL
))
367 printk(ASUS_WARNING
"Error reading brightness\n");
372 static int set_brightness(struct backlight_device
*bd
, int value
)
376 value
= (0 < value
) ? ((15 < value
) ? 15 : value
) : 0;
377 /* 0 <= value <= 15 */
379 if (!write_acpi_int(brightness_set_handle
, NULL
, value
, NULL
)) {
380 printk(ASUS_WARNING
"Error changing brightness\n");
387 static int update_bl_status(struct backlight_device
*bd
)
390 int value
= bd
->props
->brightness
;
392 rv
= set_brightness(bd
, value
);
396 value
= (bd
->props
->power
== FB_BLANK_UNBLANK
) ? 1 : 0;
397 return set_lcd_state(value
);
401 * Platform device handlers
405 * We write our info in page, we begin at offset off and cannot write more
406 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
407 * number of bytes written in page
409 static ssize_t
show_infos(struct device
*dev
,
410 struct device_attribute
*attr
, char *page
)
414 char buf
[16]; //enough for all info
416 * We use the easy way, we don't care of off and count, so we don't set eof
420 len
+= sprintf(page
, ASUS_HOTK_NAME
" " ASUS_LAPTOP_VERSION
"\n");
421 len
+= sprintf(page
+ len
, "Model reference : %s\n", hotk
->name
);
423 * The SFUN method probably allows the original driver to get the list
424 * of features supported by a given model. For now, 0x0100 or 0x0800
425 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
426 * The significance of others is yet to be found.
428 if (read_acpi_int(hotk
->handle
, "SFUN", &temp
, NULL
))
430 sprintf(page
+ len
, "SFUN value : 0x%04x\n", temp
);
432 * Another value for userspace: the ASYM method returns 0x02 for
433 * battery low and 0x04 for battery critical, its readings tend to be
434 * more accurate than those provided by _BST.
435 * Note: since not all the laptops provide this method, errors are
438 if (read_acpi_int(hotk
->handle
, "ASYM", &temp
, NULL
))
440 sprintf(page
+ len
, "ASYM value : 0x%04x\n", temp
);
442 snprintf(buf
, 16, "%d", asus_info
->length
);
443 len
+= sprintf(page
+ len
, "DSDT length : %s\n", buf
);
444 snprintf(buf
, 16, "%d", asus_info
->checksum
);
445 len
+= sprintf(page
+ len
, "DSDT checksum : %s\n", buf
);
446 snprintf(buf
, 16, "%d", asus_info
->revision
);
447 len
+= sprintf(page
+ len
, "DSDT revision : %s\n", buf
);
448 snprintf(buf
, 7, "%s", asus_info
->oem_id
);
449 len
+= sprintf(page
+ len
, "OEM id : %s\n", buf
);
450 snprintf(buf
, 9, "%s", asus_info
->oem_table_id
);
451 len
+= sprintf(page
+ len
, "OEM table id : %s\n", buf
);
452 snprintf(buf
, 16, "%x", asus_info
->oem_revision
);
453 len
+= sprintf(page
+ len
, "OEM revision : 0x%s\n", buf
);
454 snprintf(buf
, 5, "%s", asus_info
->asl_compiler_id
);
455 len
+= sprintf(page
+ len
, "ASL comp vendor id : %s\n", buf
);
456 snprintf(buf
, 16, "%x", asus_info
->asl_compiler_revision
);
457 len
+= sprintf(page
+ len
, "ASL comp revision : 0x%s\n", buf
);
463 static int parse_arg(const char *buf
, unsigned long count
, int *val
)
469 if (sscanf(buf
, "%i", val
) != 1)
474 static ssize_t
store_status(const char *buf
, size_t count
,
475 acpi_handle handle
, int mask
, int invert
)
480 rv
= parse_arg(buf
, count
, &value
);
484 write_status(handle
, out
, mask
, invert
);
492 static ssize_t
show_ledd(struct device
*dev
,
493 struct device_attribute
*attr
, char *buf
)
495 return sprintf(buf
, "0x%08x\n", hotk
->ledd_status
);
498 static ssize_t
store_ledd(struct device
*dev
, struct device_attribute
*attr
,
499 const char *buf
, size_t count
)
503 rv
= parse_arg(buf
, count
, &value
);
505 if (!write_acpi_int(ledd_set_handle
, NULL
, value
, NULL
))
506 printk(ASUS_WARNING
"LED display write failed\n");
508 hotk
->ledd_status
= (u32
) value
;
516 static ssize_t
show_wlan(struct device
*dev
,
517 struct device_attribute
*attr
, char *buf
)
519 return sprintf(buf
, "%d\n", read_status(WL_ON
));
522 static ssize_t
store_wlan(struct device
*dev
, struct device_attribute
*attr
,
523 const char *buf
, size_t count
)
525 return store_status(buf
, count
, wl_switch_handle
, WL_ON
, 0);
531 static ssize_t
show_bluetooth(struct device
*dev
,
532 struct device_attribute
*attr
, char *buf
)
534 return sprintf(buf
, "%d\n", read_status(BT_ON
));
537 static ssize_t
store_bluetooth(struct device
*dev
,
538 struct device_attribute
*attr
, const char *buf
,
541 return store_status(buf
, count
, bt_switch_handle
, BT_ON
, 0);
547 static void set_display(int value
)
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");
555 static int read_display(void)
559 /* In most of the case, we know how to set the display, but sometime
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");
566 value
&= 0x0F; /* needed for some models, shouldn't hurt others */
572 * Now, *this* one could be more user-friendly, but so far, no-one has
573 * complained. The significance of bits is the same as in store_disp()
575 static ssize_t
show_disp(struct device
*dev
,
576 struct device_attribute
*attr
, char *buf
)
578 return sprintf(buf
, "%d\n", read_display());
582 * Experimental support for display switching. As of now: 1 should activate
583 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
584 * Any combination (bitwise) of these will suffice. I never actually tested 4
585 * displays hooked up simultaneously, so be warned. See the acpi4asus README
588 static ssize_t
store_disp(struct device
*dev
, struct device_attribute
*attr
,
589 const char *buf
, size_t count
)
593 rv
= parse_arg(buf
, count
, &value
);
602 static void set_light_sens_switch(int value
)
604 if (!write_acpi_int(ls_switch_handle
, NULL
, value
, NULL
))
605 printk(ASUS_WARNING
"Error setting light sensor switch\n");
606 hotk
->light_switch
= value
;
609 static ssize_t
show_lssw(struct device
*dev
,
610 struct device_attribute
*attr
, char *buf
)
612 return sprintf(buf
, "%d\n", hotk
->light_switch
);
615 static ssize_t
store_lssw(struct device
*dev
, struct device_attribute
*attr
,
616 const char *buf
, size_t count
)
620 rv
= parse_arg(buf
, count
, &value
);
622 set_light_sens_switch(value
? 1 : 0);
627 static void set_light_sens_level(int value
)
629 if (!write_acpi_int(ls_level_handle
, NULL
, value
, NULL
))
630 printk(ASUS_WARNING
"Error setting light sensor level\n");
631 hotk
->light_level
= value
;
634 static ssize_t
show_lslvl(struct device
*dev
,
635 struct device_attribute
*attr
, char *buf
)
637 return sprintf(buf
, "%d\n", hotk
->light_level
);
640 static ssize_t
store_lslvl(struct device
*dev
, struct device_attribute
*attr
,
641 const char *buf
, size_t count
)
645 rv
= parse_arg(buf
, count
, &value
);
647 value
= (0 < value
) ? ((15 < value
) ? 15 : value
) : 0;
648 /* 0 <= value <= 15 */
649 set_light_sens_level(value
);
655 static void asus_hotk_notify(acpi_handle handle
, u32 event
, void *data
)
657 /* TODO Find a better way to handle events count. */
662 * We need to tell the backlight device when the backlight power is
665 if (event
== ATKD_LCD_ON
) {
666 write_status(NULL
, 1, LCD_ON
, 0);
667 lcd_blank(FB_BLANK_UNBLANK
);
668 } else if (event
== ATKD_LCD_OFF
) {
669 write_status(NULL
, 0, LCD_ON
, 0);
670 lcd_blank(FB_BLANK_POWERDOWN
);
673 acpi_bus_generate_event(hotk
->device
, event
,
674 hotk
->event_count
[event
% 128]++);
679 #define ASUS_CREATE_DEVICE_ATTR(_name) \
680 struct device_attribute dev_attr_##_name = { \
682 .name = __stringify(_name), \
684 .owner = THIS_MODULE }, \
689 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
691 dev_attr_##_name.attr.mode = _mode; \
692 dev_attr_##_name.show = _show; \
693 dev_attr_##_name.store = _store; \
696 static ASUS_CREATE_DEVICE_ATTR(infos
);
697 static ASUS_CREATE_DEVICE_ATTR(wlan
);
698 static ASUS_CREATE_DEVICE_ATTR(bluetooth
);
699 static ASUS_CREATE_DEVICE_ATTR(display
);
700 static ASUS_CREATE_DEVICE_ATTR(ledd
);
701 static ASUS_CREATE_DEVICE_ATTR(ls_switch
);
702 static ASUS_CREATE_DEVICE_ATTR(ls_level
);
704 static struct attribute
*asuspf_attributes
[] = {
705 &dev_attr_infos
.attr
,
707 &dev_attr_bluetooth
.attr
,
708 &dev_attr_display
.attr
,
710 &dev_attr_ls_switch
.attr
,
711 &dev_attr_ls_level
.attr
,
715 static struct attribute_group asuspf_attribute_group
= {
716 .attrs
= asuspf_attributes
719 static struct platform_driver asuspf_driver
= {
721 .name
= ASUS_HOTK_FILE
,
722 .owner
= THIS_MODULE
,
726 static struct platform_device
*asuspf_device
;
728 static void asus_hotk_add_fs(void)
730 ASUS_SET_DEVICE_ATTR(infos
, 0444, show_infos
, NULL
);
732 if (wl_switch_handle
)
733 ASUS_SET_DEVICE_ATTR(wlan
, 0644, show_wlan
, store_wlan
);
735 if (bt_switch_handle
)
736 ASUS_SET_DEVICE_ATTR(bluetooth
, 0644,
737 show_bluetooth
, store_bluetooth
);
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
);
745 ASUS_SET_DEVICE_ATTR(ledd
, 0644, show_ledd
, store_ledd
);
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
);
753 static int asus_handle_init(char *name
, acpi_handle
* handle
,
754 char **paths
, int num_paths
)
759 for (i
= 0; i
< num_paths
; i
++) {
760 status
= acpi_get_handle(NULL
, paths
[i
], handle
);
761 if (ACPI_SUCCESS(status
))
769 #define ASUS_HANDLE_INIT(object) \
770 asus_handle_init(#object, &object##_handle, object##_paths, \
771 ARRAY_SIZE(object##_paths))
774 * This function is used to initialize the hotk with right values. In this
775 * method, we can make all the detection we want, and modify the hotk struct
777 static int asus_hotk_get_info(void)
779 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
780 union acpi_object
*model
= NULL
;
781 int bsts_result
, hwrs_result
;
786 * Get DSDT headers early enough to allow for differentiating between
787 * models, but late enough to allow acpi_bus_register_driver() to fail
788 * before doing anything ACPI-specific. Should we encounter a machine,
789 * which needs special handling (i.e. its hotkey device has a different
790 * HID), this bit will be moved. A global variable asus_info contains
793 status
= acpi_get_table(ACPI_SIG_DSDT
, 1, &asus_info
);
794 if (ACPI_FAILURE(status
))
795 printk(ASUS_WARNING
"Couldn't get the DSDT table header\n");
797 /* We have to write 0 on init this far for all ASUS models */
798 if (!write_acpi_int(hotk
->handle
, "INIT", 0, &buffer
)) {
799 printk(ASUS_ERR
"Hotkey initialization failed\n");
803 /* This needs to be called for some laptops to init properly */
804 if (!read_acpi_int(hotk
->handle
, "BSTS", &bsts_result
, NULL
))
805 printk(ASUS_WARNING
"Error calling BSTS\n");
806 else if (bsts_result
)
807 printk(ASUS_NOTICE
"BSTS called, 0x%02x returned\n",
811 * Try to match the object returned by INIT to the specific model.
812 * Handle every possible object (or the lack of thereof) the DSDT
813 * writers might throw at us. When in trouble, we pass NULL to
814 * asus_model_match() and try something completely different.
816 if (buffer
.pointer
) {
817 model
= buffer
.pointer
;
818 switch (model
->type
) {
819 case ACPI_TYPE_STRING
:
820 string
= model
->string
.pointer
;
822 case ACPI_TYPE_BUFFER
:
823 string
= model
->buffer
.pointer
;
830 hotk
->name
= kstrdup(string
, GFP_KERNEL
);
835 printk(ASUS_NOTICE
" %s model detected\n", string
);
837 ASUS_HANDLE_INIT(mled_set
);
838 ASUS_HANDLE_INIT(tled_set
);
839 ASUS_HANDLE_INIT(rled_set
);
840 ASUS_HANDLE_INIT(pled_set
);
842 ASUS_HANDLE_INIT(ledd_set
);
845 * The HWRS method return informations about the hardware.
846 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
847 * The significance of others is yet to be found.
848 * If we don't find the method, we assume the device are present.
850 if (!read_acpi_int(hotk
->handle
, "HRWS", &hwrs_result
, NULL
))
851 hwrs_result
= WL_HWRS
| BT_HWRS
;
853 if (hwrs_result
& WL_HWRS
)
854 ASUS_HANDLE_INIT(wl_switch
);
855 if (hwrs_result
& BT_HWRS
)
856 ASUS_HANDLE_INIT(bt_switch
);
858 ASUS_HANDLE_INIT(wireless_status
);
860 ASUS_HANDLE_INIT(brightness_set
);
861 ASUS_HANDLE_INIT(brightness_get
);
863 ASUS_HANDLE_INIT(lcd_switch
);
865 ASUS_HANDLE_INIT(display_set
);
866 ASUS_HANDLE_INIT(display_get
);
868 /* There is a lot of models with "ALSL", but a few get
869 a real light sens, so we need to check it. */
870 if (ASUS_HANDLE_INIT(ls_switch
))
871 ASUS_HANDLE_INIT(ls_level
);
878 static int asus_hotk_check(void)
882 result
= acpi_bus_get_status(hotk
->device
);
886 if (hotk
->device
->status
.present
) {
887 result
= asus_hotk_get_info();
889 printk(ASUS_ERR
"Hotkey device not present, aborting\n");
896 static int asus_hotk_found
;
898 static int asus_hotk_add(struct acpi_device
*device
)
900 acpi_status status
= AE_OK
;
906 printk(ASUS_NOTICE
"Asus Laptop Support version %s\n",
907 ASUS_LAPTOP_VERSION
);
909 hotk
= kmalloc(sizeof(struct asus_hotk
), GFP_KERNEL
);
912 memset(hotk
, 0, sizeof(struct asus_hotk
));
914 hotk
->handle
= device
->handle
;
915 strcpy(acpi_device_name(device
), ASUS_HOTK_DEVICE_NAME
);
916 strcpy(acpi_device_class(device
), ASUS_HOTK_CLASS
);
917 acpi_driver_data(device
) = hotk
;
918 hotk
->device
= device
;
920 result
= asus_hotk_check();
927 * We install the handler, it will receive the hotk in parameter, so, we
928 * could add other data to the hotk struct
930 status
= acpi_install_notify_handler(hotk
->handle
, ACPI_SYSTEM_NOTIFY
,
931 asus_hotk_notify
, hotk
);
932 if (ACPI_FAILURE(status
))
933 printk(ASUS_ERR
"Error installing notify handler\n");
937 /* WLED and BLED are on by default */
938 write_status(bt_switch_handle
, 1, BT_ON
, 0);
939 write_status(wl_switch_handle
, 1, WL_ON
, 0);
941 /* LCD Backlight is on by default */
942 write_status(NULL
, 1, LCD_ON
, 0);
944 /* LED display is off by default */
945 hotk
->ledd_status
= 0xFFF;
947 /* Set initial values of light sensor and level */
948 hotk
->light_switch
= 1; /* Default to light sensor disabled */
949 hotk
->light_level
= 0; /* level 5 for sensor sensitivity */
951 if (ls_switch_handle
)
952 set_light_sens_switch(hotk
->light_switch
);
955 set_light_sens_level(hotk
->light_level
);
966 static int asus_hotk_remove(struct acpi_device
*device
, int type
)
968 acpi_status status
= 0;
970 if (!device
|| !acpi_driver_data(device
))
973 status
= acpi_remove_notify_handler(hotk
->handle
, ACPI_SYSTEM_NOTIFY
,
975 if (ACPI_FAILURE(status
))
976 printk(ASUS_ERR
"Error removing notify handler\n");
984 static void asus_backlight_exit(void)
986 if (asus_backlight_device
)
987 backlight_device_unregister(asus_backlight_device
);
990 #define ASUS_LED_UNREGISTER(object) \
991 if(object##_led.class_dev \
992 && !IS_ERR(object##_led.class_dev)) \
993 led_classdev_unregister(&object##_led)
995 static void asus_led_exit(void)
997 ASUS_LED_UNREGISTER(mled
);
998 ASUS_LED_UNREGISTER(tled
);
999 ASUS_LED_UNREGISTER(pled
);
1000 ASUS_LED_UNREGISTER(rled
);
1002 destroy_workqueue(led_workqueue
);
1005 static void __exit
asus_laptop_exit(void)
1007 asus_backlight_exit();
1010 acpi_bus_unregister_driver(&asus_hotk_driver
);
1011 sysfs_remove_group(&asuspf_device
->dev
.kobj
, &asuspf_attribute_group
);
1012 platform_device_unregister(asuspf_device
);
1013 platform_driver_unregister(&asuspf_driver
);
1016 static int asus_backlight_init(struct device
*dev
)
1018 struct backlight_device
*bd
;
1020 if (brightness_set_handle
&& lcd_switch_handle
) {
1021 bd
= backlight_device_register(ASUS_HOTK_FILE
, dev
,
1022 NULL
, &asusbl_data
);
1025 "Could not register asus backlight device\n");
1026 asus_backlight_device
= NULL
;
1030 asus_backlight_device
= bd
;
1033 if (likely(bd
->props
)) {
1034 bd
->props
->brightness
= read_brightness(NULL
);
1035 bd
->props
->power
= FB_BLANK_UNBLANK
;
1036 if (likely(bd
->props
->update_status
))
1037 bd
->props
->update_status(bd
);
1044 static int asus_led_register(acpi_handle handle
,
1045 struct led_classdev
*ldev
, struct device
*dev
)
1050 return led_classdev_register(dev
, ldev
);
1053 #define ASUS_LED_REGISTER(object, device) \
1054 asus_led_register(object##_set_handle, &object##_led, device)
1056 static int asus_led_init(struct device
*dev
)
1060 rv
= ASUS_LED_REGISTER(mled
, dev
);
1064 rv
= ASUS_LED_REGISTER(tled
, dev
);
1068 rv
= ASUS_LED_REGISTER(rled
, dev
);
1072 rv
= ASUS_LED_REGISTER(pled
, dev
);
1076 led_workqueue
= create_singlethread_workqueue("led_workqueue");
1083 static int __init
asus_laptop_init(void)
1091 if (!acpi_specific_hotkey_enabled
) {
1092 printk(ASUS_ERR
"Using generic hotkey driver\n");
1096 result
= acpi_bus_register_driver(&asus_hotk_driver
);
1101 * This is a bit of a kludge. We only want this module loaded
1102 * for ASUS systems, but there's currently no way to probe the
1103 * ACPI namespace for ASUS HIDs. So we just return failure if
1104 * we didn't find one, which will cause the module to be
1107 if (!asus_hotk_found
) {
1108 acpi_bus_unregister_driver(&asus_hotk_driver
);
1112 dev
= acpi_get_physical_device(hotk
->device
->handle
);
1114 result
= asus_backlight_init(dev
);
1116 goto fail_backlight
;
1118 result
= asus_led_init(dev
);
1122 /* Register platform stuff */
1123 result
= platform_driver_register(&asuspf_driver
);
1125 goto fail_platform_driver
;
1127 asuspf_device
= platform_device_alloc(ASUS_HOTK_FILE
, -1);
1128 if (!asuspf_device
) {
1130 goto fail_platform_device1
;
1133 result
= platform_device_add(asuspf_device
);
1135 goto fail_platform_device2
;
1137 result
= sysfs_create_group(&asuspf_device
->dev
.kobj
,
1138 &asuspf_attribute_group
);
1145 platform_device_del(asuspf_device
);
1147 fail_platform_device2
:
1148 platform_device_put(asuspf_device
);
1150 fail_platform_device1
:
1151 platform_driver_unregister(&asuspf_driver
);
1153 fail_platform_driver
:
1157 asus_backlight_exit();
1164 module_init(asus_laptop_init
);
1165 module_exit(asus_laptop_exit
);