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 GLED_ON 0x40 //Gaming LED
85 #define LCD_ON 0x80 //LCD backlight
87 #define ASUS_LOG ASUS_HOTK_FILE ": "
88 #define ASUS_ERR KERN_ERR ASUS_LOG
89 #define ASUS_WARNING KERN_WARNING ASUS_LOG
90 #define ASUS_NOTICE KERN_NOTICE ASUS_LOG
91 #define ASUS_INFO KERN_INFO ASUS_LOG
92 #define ASUS_DEBUG KERN_DEBUG ASUS_LOG
94 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
95 MODULE_DESCRIPTION(ASUS_HOTK_NAME);
96 MODULE_LICENSE("GPL");
98 #define ASUS_HANDLE(object, paths...) \
99 static acpi_handle object##_handle = NULL; \
100 static char *object##_paths[] = { paths }
103 ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED");
104 ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED");
105 ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */
106 ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */
107 ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */
110 ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM");
112 /* Bluetooth and WLAN
113 * WLED and BLED are not handled like other XLED, because in some dsdt
114 * they also control the WLAN/Bluetooth device.
116 ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED");
117 ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED");
118 ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */
121 ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV");
122 ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV");
125 ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */
126 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */
127 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */
128 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */
129 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */
130 "\\_SB.PCI0.PX40.Q10", /* S1x */
131 "\\Q10"); /* A2x, L2D, L3D, M2E */
134 ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP");
135 ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G
136 M6A M6V VX-1 V6J V6V W3Z */
137 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V
138 S5A M5A z33A W1Jc W2V */
139 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */
140 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */
141 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */
142 "\\_SB.PCI0.VGA.GETD", /* Z96F */
144 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
146 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
147 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
149 ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */
150 ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
153 * This is the main structure, we can use it to store anything interesting
154 * about the hotk device
157 char *name; //laptop name
158 struct acpi_device *device; //the device we are in
159 acpi_handle handle; //the handle of the hotk device
160 char status; //status of the hotk, for LEDs, ...
161 u32 ledd_status; //status of the LED display
162 u8 light_level; //light sensor level
163 u8 light_switch; //light sensor switch value
164 u16 event_count[128]; //count for each event TODO make this better
168 * This header is made available to allow proper configuration given model,
169 * revision number , ... this info cannot go in struct asus_hotk because it is
170 * available before the hotk
172 static struct acpi_table_header *asus_info;
174 /* The actual device the driver binds to */
175 static struct asus_hotk *hotk;
178 * The hotkey driver declaration
180 static int asus_hotk_add(struct acpi_device *device);
181 static int asus_hotk_remove(struct acpi_device *device, int type);
182 static struct acpi_driver asus_hotk_driver = {
183 .name = ASUS_HOTK_NAME,
184 .class = ASUS_HOTK_CLASS,
185 .ids = ASUS_HOTK_HID,
187 .add = asus_hotk_add,
188 .remove = asus_hotk_remove,
192 /* The backlight device /sys/class/backlight */
193 static struct backlight_device *asus_backlight_device;
196 * The backlight class declaration
198 static int read_brightness(struct backlight_device *bd);
199 static int update_bl_status(struct backlight_device *bd);
200 static struct backlight_ops asusbl_ops = {
201 .get_brightness = read_brightness,
202 .update_status = update_bl_status,
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 static 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");
226 ASUS_LED(gled, "gaming");
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
233 * returns 1 if write is successful, 0 else.
235 static int write_acpi_int(acpi_handle handle, const char *method, int val,
236 struct acpi_buffer *output)
238 struct acpi_object_list params; //list of input parameters (an int here)
239 union acpi_object in_obj; //the only param we use
243 params.pointer = &in_obj;
244 in_obj.type = ACPI_TYPE_INTEGER;
245 in_obj.integer.value = val;
247 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
248 return (status == AE_OK);
251 static int read_wireless_status(int mask)
254 acpi_status rv = AE_OK;
256 if (!wireless_status_handle)
257 return (hotk->status & mask) ? 1 : 0;
259 rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status);
260 if (ACPI_FAILURE(rv))
261 printk(ASUS_WARNING "Error reading Wireless status\n");
263 return (status & mask) ? 1 : 0;
265 return (hotk->status & mask) ? 1 : 0;
268 /* Generic LED functions */
269 static int read_status(int mask)
271 /* There is a special method for both wireless devices */
272 if (mask == BT_ON || mask == WL_ON)
273 return read_wireless_status(mask);
275 return (hotk->status & mask) ? 1 : 0;
278 static void write_status(acpi_handle handle, int out, int mask)
280 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
287 out = (out & 0x1) + 1;
294 if (handle && !write_acpi_int(handle, NULL, out, NULL))
295 printk(ASUS_WARNING " write failed %x\n", mask);
298 /* /sys/class/led handlers */
299 #define ASUS_LED_HANDLER(object, mask) \
300 static void object##_led_set(struct led_classdev *led_cdev, \
301 enum led_brightness value) \
303 object##_led_wk = value; \
304 queue_work(led_workqueue, &object##_led_work); \
306 static void object##_led_update(struct work_struct *ignored) \
308 int value = object##_led_wk; \
309 write_status(object##_set_handle, value, (mask)); \
312 ASUS_LED_HANDLER(mled, MLED_ON);
313 ASUS_LED_HANDLER(pled, PLED_ON);
314 ASUS_LED_HANDLER(rled, RLED_ON);
315 ASUS_LED_HANDLER(tled, TLED_ON);
316 ASUS_LED_HANDLER(gled, GLED_ON);
318 static int get_lcd_state(void)
320 return read_status(LCD_ON);
323 static int set_lcd_state(int value)
326 acpi_status status = 0;
330 if (lcd == get_lcd_state())
333 if (lcd_switch_handle) {
334 status = acpi_evaluate_object(lcd_switch_handle,
337 if (ACPI_FAILURE(status))
338 printk(ASUS_WARNING "Error switching LCD\n");
341 write_status(NULL, lcd, LCD_ON);
345 static void lcd_blank(int blank)
347 struct backlight_device *bd = asus_backlight_device;
350 bd->props.power = blank;
351 backlight_update_status(bd);
355 static int read_brightness(struct backlight_device *bd)
358 acpi_status rv = AE_OK;
360 rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value);
361 if (ACPI_FAILURE(rv))
362 printk(ASUS_WARNING "Error reading brightness\n");
367 static int set_brightness(struct backlight_device *bd, int value)
371 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
372 /* 0 <= value <= 15 */
374 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
375 printk(ASUS_WARNING "Error changing brightness\n");
382 static int update_bl_status(struct backlight_device *bd)
385 int value = bd->props.brightness;
387 rv = set_brightness(bd, value);
391 value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0;
392 return set_lcd_state(value);
396 * Platform device handlers
400 * We write our info in page, we begin at offset off and cannot write more
401 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
402 * number of bytes written in page
404 static ssize_t show_infos(struct device *dev,
405 struct device_attribute *attr, char *page)
409 char buf[16]; //enough for all info
410 acpi_status rv = AE_OK;
413 * We use the easy way, we don't care of off and count, so we don't set eof
417 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
418 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
420 * The SFUN method probably allows the original driver to get the list
421 * of features supported by a given model. For now, 0x0100 or 0x0800
422 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
423 * The significance of others is yet to be found.
425 rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp);
426 if (!ACPI_FAILURE(rv))
427 len += sprintf(page + len, "SFUN value : 0x%04x\n",
430 * Another value for userspace: the ASYM method returns 0x02 for
431 * battery low and 0x04 for battery critical, its readings tend to be
432 * more accurate than those provided by _BST.
433 * Note: since not all the laptops provide this method, errors are
436 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp);
437 if (!ACPI_FAILURE(rv))
438 len += sprintf(page + len, "ASYM value : 0x%04x\n",
441 snprintf(buf, 16, "%d", asus_info->length);
442 len += sprintf(page + len, "DSDT length : %s\n", buf);
443 snprintf(buf, 16, "%d", asus_info->checksum);
444 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
445 snprintf(buf, 16, "%d", asus_info->revision);
446 len += sprintf(page + len, "DSDT revision : %s\n", buf);
447 snprintf(buf, 7, "%s", asus_info->oem_id);
448 len += sprintf(page + len, "OEM id : %s\n", buf);
449 snprintf(buf, 9, "%s", asus_info->oem_table_id);
450 len += sprintf(page + len, "OEM table id : %s\n", buf);
451 snprintf(buf, 16, "%x", asus_info->oem_revision);
452 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
453 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
454 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
455 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
456 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
462 static int parse_arg(const char *buf, unsigned long count, int *val)
468 if (sscanf(buf, "%i", val) != 1)
473 static ssize_t store_status(const char *buf, size_t count,
474 acpi_handle handle, int mask)
479 rv = parse_arg(buf, count, &value);
483 write_status(handle, out, mask);
491 static ssize_t show_ledd(struct device *dev,
492 struct device_attribute *attr, char *buf)
494 return sprintf(buf, "0x%08x\n", hotk->ledd_status);
497 static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
498 const char *buf, size_t count)
502 rv = parse_arg(buf, count, &value);
504 if (!write_acpi_int(ledd_set_handle, NULL, value, NULL))
505 printk(ASUS_WARNING "LED display write failed\n");
507 hotk->ledd_status = (u32) value;
515 static ssize_t show_wlan(struct device *dev,
516 struct device_attribute *attr, char *buf)
518 return sprintf(buf, "%d\n", read_status(WL_ON));
521 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
522 const char *buf, size_t count)
524 return store_status(buf, count, wl_switch_handle, WL_ON);
530 static ssize_t show_bluetooth(struct device *dev,
531 struct device_attribute *attr, char *buf)
533 return sprintf(buf, "%d\n", read_status(BT_ON));
536 static ssize_t store_bluetooth(struct device *dev,
537 struct device_attribute *attr, const char *buf,
540 return store_status(buf, count, bt_switch_handle, BT_ON);
546 static void set_display(int value)
548 /* no sanity check needed for now */
549 if (!write_acpi_int(display_set_handle, NULL, value, NULL))
550 printk(ASUS_WARNING "Error setting display\n");
554 static int read_display(void)
557 acpi_status rv = AE_OK;
559 /* In most of the case, we know how to set the display, but sometime
561 if (display_get_handle) {
562 rv = acpi_evaluate_integer(display_get_handle, NULL,
564 if (ACPI_FAILURE(rv))
565 printk(ASUS_WARNING "Error reading display status\n");
568 value &= 0x0F; /* needed for some models, shouldn't hurt others */
574 * Now, *this* one could be more user-friendly, but so far, no-one has
575 * complained. The significance of bits is the same as in store_disp()
577 static ssize_t show_disp(struct device *dev,
578 struct device_attribute *attr, char *buf)
580 return sprintf(buf, "%d\n", read_display());
584 * Experimental support for display switching. As of now: 1 should activate
585 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
586 * Any combination (bitwise) of these will suffice. I never actually tested 4
587 * displays hooked up simultaneously, so be warned. See the acpi4asus README
590 static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
591 const char *buf, size_t count)
595 rv = parse_arg(buf, count, &value);
604 static void set_light_sens_switch(int value)
606 if (!write_acpi_int(ls_switch_handle, NULL, value, NULL))
607 printk(ASUS_WARNING "Error setting light sensor switch\n");
608 hotk->light_switch = value;
611 static ssize_t show_lssw(struct device *dev,
612 struct device_attribute *attr, char *buf)
614 return sprintf(buf, "%d\n", hotk->light_switch);
617 static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
618 const char *buf, size_t count)
622 rv = parse_arg(buf, count, &value);
624 set_light_sens_switch(value ? 1 : 0);
629 static void set_light_sens_level(int value)
631 if (!write_acpi_int(ls_level_handle, NULL, value, NULL))
632 printk(ASUS_WARNING "Error setting light sensor level\n");
633 hotk->light_level = value;
636 static ssize_t show_lslvl(struct device *dev,
637 struct device_attribute *attr, char *buf)
639 return sprintf(buf, "%d\n", hotk->light_level);
642 static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
643 const char *buf, size_t count)
647 rv = parse_arg(buf, count, &value);
649 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
650 /* 0 <= value <= 15 */
651 set_light_sens_level(value);
657 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
659 /* TODO Find a better way to handle events count. */
664 * We need to tell the backlight device when the backlight power is
667 if (event == ATKD_LCD_ON) {
668 write_status(NULL, 1, LCD_ON);
669 lcd_blank(FB_BLANK_UNBLANK);
670 } else if (event == ATKD_LCD_OFF) {
671 write_status(NULL, 0, LCD_ON);
672 lcd_blank(FB_BLANK_POWERDOWN);
675 acpi_bus_generate_event(hotk->device, event,
676 hotk->event_count[event % 128]++);
681 #define ASUS_CREATE_DEVICE_ATTR(_name) \
682 struct device_attribute dev_attr_##_name = { \
684 .name = __stringify(_name), \
686 .owner = THIS_MODULE }, \
691 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
693 dev_attr_##_name.attr.mode = _mode; \
694 dev_attr_##_name.show = _show; \
695 dev_attr_##_name.store = _store; \
698 static ASUS_CREATE_DEVICE_ATTR(infos);
699 static ASUS_CREATE_DEVICE_ATTR(wlan);
700 static ASUS_CREATE_DEVICE_ATTR(bluetooth);
701 static ASUS_CREATE_DEVICE_ATTR(display);
702 static ASUS_CREATE_DEVICE_ATTR(ledd);
703 static ASUS_CREATE_DEVICE_ATTR(ls_switch);
704 static ASUS_CREATE_DEVICE_ATTR(ls_level);
706 static struct attribute *asuspf_attributes[] = {
707 &dev_attr_infos.attr,
709 &dev_attr_bluetooth.attr,
710 &dev_attr_display.attr,
712 &dev_attr_ls_switch.attr,
713 &dev_attr_ls_level.attr,
717 static struct attribute_group asuspf_attribute_group = {
718 .attrs = asuspf_attributes
721 static struct platform_driver asuspf_driver = {
723 .name = ASUS_HOTK_FILE,
724 .owner = THIS_MODULE,
728 static struct platform_device *asuspf_device;
730 static void asus_hotk_add_fs(void)
732 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
734 if (wl_switch_handle)
735 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
737 if (bt_switch_handle)
738 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
739 show_bluetooth, store_bluetooth);
741 if (display_set_handle && display_get_handle)
742 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
743 else if (display_set_handle)
744 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
747 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);
749 if (ls_switch_handle && ls_level_handle) {
750 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
751 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
755 static int asus_handle_init(char *name, acpi_handle * handle,
756 char **paths, int num_paths)
761 for (i = 0; i < num_paths; i++) {
762 status = acpi_get_handle(NULL, paths[i], handle);
763 if (ACPI_SUCCESS(status))
771 #define ASUS_HANDLE_INIT(object) \
772 asus_handle_init(#object, &object##_handle, object##_paths, \
773 ARRAY_SIZE(object##_paths))
776 * This function is used to initialize the hotk with right values. In this
777 * method, we can make all the detection we want, and modify the hotk struct
779 static int asus_hotk_get_info(void)
781 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
782 union acpi_object *model = NULL;
783 ulong bsts_result, hwrs_result;
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
795 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
796 if (ACPI_FAILURE(status))
797 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
799 /* We have to write 0 on init this far for all ASUS models */
800 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
801 printk(ASUS_ERR "Hotkey initialization failed\n");
805 /* This needs to be called for some laptops to init properly */
807 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result);
808 if (ACPI_FAILURE(status))
809 printk(ASUS_WARNING "Error calling BSTS\n");
810 else if (bsts_result)
811 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
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.
820 if (buffer.pointer) {
821 model = buffer.pointer;
822 switch (model->type) {
823 case ACPI_TYPE_STRING:
824 string = model->string.pointer;
826 case ACPI_TYPE_BUFFER:
827 string = model->buffer.pointer;
834 hotk->name = kstrdup(string, GFP_KERNEL);
839 printk(ASUS_NOTICE " %s model detected\n", string);
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 ASUS_HANDLE_INIT(gled_set);
847 ASUS_HANDLE_INIT(ledd_set);
850 * The HWRS method return informations about the hardware.
851 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
852 * The significance of others is yet to be found.
853 * If we don't find the method, we assume the device are present.
856 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result);
857 if (ACPI_FAILURE(status))
858 hwrs_result = WL_HWRS | BT_HWRS;
860 if (hwrs_result & WL_HWRS)
861 ASUS_HANDLE_INIT(wl_switch);
862 if (hwrs_result & BT_HWRS)
863 ASUS_HANDLE_INIT(bt_switch);
865 ASUS_HANDLE_INIT(wireless_status);
867 ASUS_HANDLE_INIT(brightness_set);
868 ASUS_HANDLE_INIT(brightness_get);
870 ASUS_HANDLE_INIT(lcd_switch);
872 ASUS_HANDLE_INIT(display_set);
873 ASUS_HANDLE_INIT(display_get);
875 /* There is a lot of models with "ALSL", but a few get
876 a real light sens, so we need to check it. */
877 if (ASUS_HANDLE_INIT(ls_switch))
878 ASUS_HANDLE_INIT(ls_level);
885 static int asus_hotk_check(void)
889 result = acpi_bus_get_status(hotk->device);
893 if (hotk->device->status.present) {
894 result = asus_hotk_get_info();
896 printk(ASUS_ERR "Hotkey device not present, aborting\n");
903 static int asus_hotk_found;
905 static int asus_hotk_add(struct acpi_device *device)
907 acpi_status status = AE_OK;
913 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
914 ASUS_LAPTOP_VERSION);
916 hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
919 memset(hotk, 0, sizeof(struct asus_hotk));
921 hotk->handle = device->handle;
922 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
923 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
924 acpi_driver_data(device) = hotk;
925 hotk->device = device;
927 result = asus_hotk_check();
934 * We install the handler, it will receive the hotk in parameter, so, we
935 * could add other data to the hotk struct
937 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
938 asus_hotk_notify, hotk);
939 if (ACPI_FAILURE(status))
940 printk(ASUS_ERR "Error installing notify handler\n");
944 /* WLED and BLED are on by default */
945 write_status(bt_switch_handle, 1, BT_ON);
946 write_status(wl_switch_handle, 1, WL_ON);
948 /* If the h/w switch is off, we need to check the real status */
949 write_status(NULL, read_status(BT_ON), BT_ON);
950 write_status(NULL, read_status(WL_ON), WL_ON);
952 /* LCD Backlight is on by default */
953 write_status(NULL, 1, LCD_ON);
955 /* LED display is off by default */
956 hotk->ledd_status = 0xFFF;
958 /* Set initial values of light sensor and level */
959 hotk->light_switch = 1; /* Default to light sensor disabled */
960 hotk->light_level = 0; /* level 5 for sensor sensitivity */
962 if (ls_switch_handle)
963 set_light_sens_switch(hotk->light_switch);
966 set_light_sens_level(hotk->light_level);
977 static int asus_hotk_remove(struct acpi_device *device, int type)
979 acpi_status status = 0;
981 if (!device || !acpi_driver_data(device))
984 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
986 if (ACPI_FAILURE(status))
987 printk(ASUS_ERR "Error removing notify handler\n");
995 static void asus_backlight_exit(void)
997 if (asus_backlight_device)
998 backlight_device_unregister(asus_backlight_device);
1001 #define ASUS_LED_UNREGISTER(object) \
1002 if(object##_led.class_dev \
1003 && !IS_ERR(object##_led.class_dev)) \
1004 led_classdev_unregister(&object##_led)
1006 static void asus_led_exit(void)
1008 ASUS_LED_UNREGISTER(mled);
1009 ASUS_LED_UNREGISTER(tled);
1010 ASUS_LED_UNREGISTER(pled);
1011 ASUS_LED_UNREGISTER(rled);
1012 ASUS_LED_UNREGISTER(gled);
1014 destroy_workqueue(led_workqueue);
1017 static void __exit asus_laptop_exit(void)
1019 asus_backlight_exit();
1022 acpi_bus_unregister_driver(&asus_hotk_driver);
1023 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
1024 platform_device_unregister(asuspf_device);
1025 platform_driver_unregister(&asuspf_driver);
1028 static int asus_backlight_init(struct device *dev)
1030 struct backlight_device *bd;
1032 if (brightness_set_handle && lcd_switch_handle) {
1033 bd = backlight_device_register(ASUS_HOTK_FILE, dev,
1037 "Could not register asus backlight device\n");
1038 asus_backlight_device = NULL;
1042 asus_backlight_device = bd;
1044 bd->props.max_brightness = 15;
1045 bd->props.brightness = read_brightness(NULL);
1046 bd->props.power = FB_BLANK_UNBLANK;
1047 backlight_update_status(bd);
1052 static int asus_led_register(acpi_handle handle,
1053 struct led_classdev *ldev, struct device *dev)
1058 return led_classdev_register(dev, ldev);
1061 #define ASUS_LED_REGISTER(object, device) \
1062 asus_led_register(object##_set_handle, &object##_led, device)
1064 static int asus_led_init(struct device *dev)
1068 rv = ASUS_LED_REGISTER(mled, dev);
1072 rv = ASUS_LED_REGISTER(tled, dev);
1076 rv = ASUS_LED_REGISTER(rled, dev);
1080 rv = ASUS_LED_REGISTER(pled, dev);
1084 rv = ASUS_LED_REGISTER(gled, dev);
1088 led_workqueue = create_singlethread_workqueue("led_workqueue");
1095 static int __init asus_laptop_init(void)
1103 result = acpi_bus_register_driver(&asus_hotk_driver);
1108 * This is a bit of a kludge. We only want this module loaded
1109 * for ASUS systems, but there's currently no way to probe the
1110 * ACPI namespace for ASUS HIDs. So we just return failure if
1111 * we didn't find one, which will cause the module to be
1114 if (!asus_hotk_found) {
1115 acpi_bus_unregister_driver(&asus_hotk_driver);
1119 dev = acpi_get_physical_device(hotk->device->handle);
1121 result = asus_backlight_init(dev);
1123 goto fail_backlight;
1125 result = asus_led_init(dev);
1129 /* Register platform stuff */
1130 result = platform_driver_register(&asuspf_driver);
1132 goto fail_platform_driver;
1134 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
1135 if (!asuspf_device) {
1137 goto fail_platform_device1;
1140 result = platform_device_add(asuspf_device);
1142 goto fail_platform_device2;
1144 result = sysfs_create_group(&asuspf_device->dev.kobj,
1145 &asuspf_attribute_group);
1152 platform_device_del(asuspf_device);
1154 fail_platform_device2:
1155 platform_device_put(asuspf_device);
1157 fail_platform_device1:
1158 platform_driver_unregister(&asuspf_driver);
1160 fail_platform_driver:
1164 asus_backlight_exit();
1171 module_init(asus_laptop_init);
1172 module_exit(asus_laptop_exit);