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 */
107 /* Bluetooth and WLAN
108 * WLED and BLED are not handled like other XLED, because in some dsdt
109 * they also control the WLAN/Bluetooth device.
111 ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED");
112 ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED");
113 ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */
116 ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV");
117 ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV");
120 ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */
121 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */
122 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */
123 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */
124 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */
125 "\\_SB.PCI0.PX40.Q10", /* S1x */
126 "\\Q10"); /* A2x, L2D, L3D, M2E */
129 * This is the main structure, we can use it to store anything interesting
130 * about the hotk device
133 char *name; //laptop name
134 struct acpi_device *device; //the device we are in
135 acpi_handle handle; //the handle of the hotk device
136 char status; //status of the hotk, for LEDs, ...
137 u16 event_count[128]; //count for each event TODO make this better
141 * This header is made available to allow proper configuration given model,
142 * revision number , ... this info cannot go in struct asus_hotk because it is
143 * available before the hotk
145 static struct acpi_table_header *asus_info;
147 /* The actual device the driver binds to */
148 static struct asus_hotk *hotk;
151 * The hotkey driver declaration
153 static int asus_hotk_add(struct acpi_device *device);
154 static int asus_hotk_remove(struct acpi_device *device, int type);
155 static struct acpi_driver asus_hotk_driver = {
156 .name = ASUS_HOTK_NAME,
157 .class = ASUS_HOTK_CLASS,
158 .ids = ASUS_HOTK_HID,
160 .add = asus_hotk_add,
161 .remove = asus_hotk_remove,
165 /* The backlight device /sys/class/backlight */
166 static struct backlight_device *asus_backlight_device;
169 * The backlight class declaration
171 static int read_brightness(struct backlight_device *bd);
172 static int update_bl_status(struct backlight_device *bd);
173 static struct backlight_properties asusbl_data = {
174 .owner = THIS_MODULE,
175 .get_brightness = read_brightness,
176 .update_status = update_bl_status,
177 .max_brightness = 15,
180 /* These functions actually update the LED's, and are called from a
181 * workqueue. By doing this as separate work rather than when the LED
182 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
183 * potentially bad time, such as a timer interrupt. */
184 static struct workqueue_struct *led_workqueue;
186 #define ASUS_LED(object, ledname) \
187 static void object##_led_set(struct led_classdev *led_cdev, \
188 enum led_brightness value); \
189 static void object##_led_update(struct work_struct *ignored); \
190 static int object##_led_wk; \
191 DECLARE_WORK(object##_led_work, object##_led_update); \
192 static struct led_classdev object##_led = { \
193 .name = "asus:" ledname, \
194 .brightness_set = object##_led_set, \
197 ASUS_LED(mled, "mail");
198 ASUS_LED(tled, "touchpad");
199 ASUS_LED(rled, "record");
200 ASUS_LED(pled, "phone");
203 * This function evaluates an ACPI method, given an int as parameter, the
204 * method is searched within the scope of the handle, can be NULL. The output
205 * of the method is written is output, which can also be NULL
207 * returns 1 if write is successful, 0 else.
209 static int write_acpi_int(acpi_handle handle, const char *method, int val,
210 struct acpi_buffer *output)
212 struct acpi_object_list params; //list of input parameters (an int here)
213 union acpi_object in_obj; //the only param we use
217 params.pointer = &in_obj;
218 in_obj.type = ACPI_TYPE_INTEGER;
219 in_obj.integer.value = val;
221 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
222 return (status == AE_OK);
225 static int read_acpi_int(acpi_handle handle, const char *method, int *val,
226 struct acpi_object_list *params)
228 struct acpi_buffer output;
229 union acpi_object out_obj;
232 output.length = sizeof(out_obj);
233 output.pointer = &out_obj;
235 status = acpi_evaluate_object(handle, (char *)method, params, &output);
236 *val = out_obj.integer.value;
237 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
240 static int read_wireless_status(int mask) {
243 if (!wireless_status_handle)
244 return (hotk->status & mask) ? 1 : 0;
246 if (read_acpi_int(wireless_status_handle, NULL, &status, NULL)) {
247 return (status & mask) ? 1 : 0;
249 printk(ASUS_WARNING "Error reading Wireless status\n");
251 return (hotk->status & mask) ? 1 : 0;
254 /* Generic LED functions */
255 static int read_status(int mask)
257 /* There is a special method for both wireless devices */
258 if (mask == BT_ON || mask == WL_ON)
259 return read_wireless_status(mask);
261 return (hotk->status & mask) ? 1 : 0;
264 static void write_status(acpi_handle handle, int out, int mask,
267 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
269 if (invert) /* invert target value */
272 if (handle && !write_acpi_int(handle, NULL, out, NULL))
273 printk(ASUS_WARNING " write failed\n");
276 /* /sys/class/led handlers */
277 #define ASUS_LED_HANDLER(object, mask, invert) \
278 static void object##_led_set(struct led_classdev *led_cdev, \
279 enum led_brightness value) \
281 object##_led_wk = value; \
282 queue_work(led_workqueue, &object##_led_work); \
284 static void object##_led_update(struct work_struct *ignored) \
286 int value = object##_led_wk; \
287 write_status(object##_set_handle, value, (mask), (invert)); \
290 ASUS_LED_HANDLER(mled, MLED_ON, 1);
291 ASUS_LED_HANDLER(pled, PLED_ON, 0);
292 ASUS_LED_HANDLER(rled, RLED_ON, 0);
293 ASUS_LED_HANDLER(tled, TLED_ON, 0);
295 static int get_lcd_state(void)
297 return read_status(LCD_ON);
300 static int set_lcd_state(int value)
303 acpi_status status = 0;
307 if (lcd == get_lcd_state())
310 if(lcd_switch_handle) {
311 status = acpi_evaluate_object(lcd_switch_handle,
314 if (ACPI_FAILURE(status))
315 printk(ASUS_WARNING "Error switching LCD\n");
318 write_status(NULL, lcd, LCD_ON, 0);
322 static void lcd_blank(int blank)
324 struct backlight_device *bd = asus_backlight_device;
328 if(likely(bd->props)) {
329 bd->props->power = blank;
330 if(likely(bd->props->update_status))
331 bd->props->update_status(bd);
337 static int read_brightness(struct backlight_device *bd)
341 if (!read_acpi_int(brightness_get_handle, NULL, &value, NULL))
342 printk(ASUS_WARNING "Error reading brightness\n");
347 static int set_brightness(struct backlight_device *bd, int value)
351 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
352 /* 0 <= value <= 15 */
354 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
355 printk(ASUS_WARNING "Error changing brightness\n");
362 static int update_bl_status(struct backlight_device *bd)
365 int value = bd->props->brightness;
367 rv = set_brightness(bd, value);
371 value = (bd->props->power == FB_BLANK_UNBLANK) ? 1 : 0;
372 return set_lcd_state(value);
376 * Platform device handlers
380 * We write our info in page, we begin at offset off and cannot write more
381 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
382 * number of bytes written in page
384 static ssize_t show_infos(struct device *dev,
385 struct device_attribute *attr, char *page)
389 char buf[16]; //enough for all info
391 * We use the easy way, we don't care of off and count, so we don't set eof
395 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
396 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
398 * The SFUN method probably allows the original driver to get the list
399 * of features supported by a given model. For now, 0x0100 or 0x0800
400 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
401 * The significance of others is yet to be found.
403 if (read_acpi_int(hotk->handle, "SFUN", &temp, NULL))
405 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
407 * Another value for userspace: the ASYM method returns 0x02 for
408 * battery low and 0x04 for battery critical, its readings tend to be
409 * more accurate than those provided by _BST.
410 * Note: since not all the laptops provide this method, errors are
413 if (read_acpi_int(hotk->handle, "ASYM", &temp, NULL))
415 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
417 snprintf(buf, 16, "%d", asus_info->length);
418 len += sprintf(page + len, "DSDT length : %s\n", buf);
419 snprintf(buf, 16, "%d", asus_info->checksum);
420 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
421 snprintf(buf, 16, "%d", asus_info->revision);
422 len += sprintf(page + len, "DSDT revision : %s\n", buf);
423 snprintf(buf, 7, "%s", asus_info->oem_id);
424 len += sprintf(page + len, "OEM id : %s\n", buf);
425 snprintf(buf, 9, "%s", asus_info->oem_table_id);
426 len += sprintf(page + len, "OEM table id : %s\n", buf);
427 snprintf(buf, 16, "%x", asus_info->oem_revision);
428 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
429 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
430 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
431 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
432 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
438 static int parse_arg(const char *buf, unsigned long count, int *val)
444 if (sscanf(buf, "%i", val) != 1)
449 static ssize_t store_status(const char *buf, size_t count,
450 acpi_handle handle, int mask, int invert)
455 rv = parse_arg(buf, count, &value);
459 write_status(handle, out, mask, invert);
467 static ssize_t show_wlan(struct device *dev,
468 struct device_attribute *attr, char *buf)
470 return sprintf(buf, "%d\n", read_status(WL_ON));
473 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
474 const char *buf, size_t count)
476 return store_status(buf, count, wl_switch_handle, WL_ON, 0);
482 static ssize_t show_bluetooth(struct device *dev,
483 struct device_attribute *attr, char *buf)
485 return sprintf(buf, "%d\n", read_status(BT_ON));
488 static ssize_t store_bluetooth(struct device *dev, struct device_attribute *attr,
489 const char *buf, size_t count)
491 return store_status(buf, count, bt_switch_handle, BT_ON, 0);
494 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
496 /* TODO Find a better way to handle events count. */
501 * We need to tell the backlight device when the backlight power is
504 if (event == ATKD_LCD_ON) {
505 write_status(NULL, 1, LCD_ON, 0);
506 lcd_blank(FB_BLANK_UNBLANK);
507 } else if(event == ATKD_LCD_OFF) {
508 write_status(NULL, 0, LCD_ON, 0);
509 lcd_blank(FB_BLANK_POWERDOWN);
512 acpi_bus_generate_event(hotk->device, event,
513 hotk->event_count[event % 128]++);
518 #define ASUS_CREATE_DEVICE_ATTR(_name) \
519 struct device_attribute dev_attr_##_name = { \
521 .name = __stringify(_name), \
523 .owner = THIS_MODULE }, \
528 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
530 dev_attr_##_name.attr.mode = _mode; \
531 dev_attr_##_name.show = _show; \
532 dev_attr_##_name.store = _store; \
535 static ASUS_CREATE_DEVICE_ATTR(infos);
536 static ASUS_CREATE_DEVICE_ATTR(wlan);
537 static ASUS_CREATE_DEVICE_ATTR(bluetooth);
539 static struct attribute *asuspf_attributes[] = {
540 &dev_attr_infos.attr,
542 &dev_attr_bluetooth.attr,
546 static struct attribute_group asuspf_attribute_group = {
547 .attrs = asuspf_attributes
550 static struct platform_driver asuspf_driver = {
552 .name = ASUS_HOTK_FILE,
553 .owner = THIS_MODULE,
557 static struct platform_device *asuspf_device;
560 static void asus_hotk_add_fs(void)
562 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
564 if (wl_switch_handle)
565 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
567 if (bt_switch_handle)
568 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
569 show_bluetooth, store_bluetooth);
572 static int asus_handle_init(char *name, acpi_handle *handle,
573 char **paths, int num_paths)
578 for (i = 0; i < num_paths; i++) {
579 status = acpi_get_handle(NULL, paths[i], handle);
580 if (ACPI_SUCCESS(status))
588 #define ASUS_HANDLE_INIT(object) \
589 asus_handle_init(#object, &object##_handle, object##_paths, \
590 ARRAY_SIZE(object##_paths))
594 * This function is used to initialize the hotk with right values. In this
595 * method, we can make all the detection we want, and modify the hotk struct
597 static int asus_hotk_get_info(void)
599 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
600 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
601 union acpi_object *model = NULL;
602 int bsts_result, hwrs_result;
607 * Get DSDT headers early enough to allow for differentiating between
608 * models, but late enough to allow acpi_bus_register_driver() to fail
609 * before doing anything ACPI-specific. Should we encounter a machine,
610 * which needs special handling (i.e. its hotkey device has a different
611 * HID), this bit will be moved. A global variable asus_info contains
614 status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
615 if (ACPI_FAILURE(status))
616 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
618 asus_info = dsdt.pointer;
620 /* We have to write 0 on init this far for all ASUS models */
621 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
622 printk(ASUS_ERR "Hotkey initialization failed\n");
626 /* This needs to be called for some laptops to init properly */
627 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result, NULL))
628 printk(ASUS_WARNING "Error calling BSTS\n");
629 else if (bsts_result)
630 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
634 * Try to match the object returned by INIT to the specific model.
635 * Handle every possible object (or the lack of thereof) the DSDT
636 * writers might throw at us. When in trouble, we pass NULL to
637 * asus_model_match() and try something completely different.
639 if (buffer.pointer) {
640 model = buffer.pointer;
641 switch (model->type) {
642 case ACPI_TYPE_STRING:
643 string = model->string.pointer;
645 case ACPI_TYPE_BUFFER:
646 string = model->buffer.pointer;
653 hotk->name = kstrdup(string, GFP_KERNEL);
658 printk(ASUS_NOTICE " %s model detected\n", string);
660 ASUS_HANDLE_INIT(mled_set);
661 ASUS_HANDLE_INIT(tled_set);
662 ASUS_HANDLE_INIT(rled_set);
663 ASUS_HANDLE_INIT(pled_set);
666 * The HWRS method return informations about the hardware.
667 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
668 * The significance of others is yet to be found.
669 * If we don't find the method, we assume the device are present.
671 if (!read_acpi_int(hotk->handle, "HRWS", &hwrs_result, NULL))
672 hwrs_result = WL_HWRS | BT_HWRS;
674 if(hwrs_result & WL_HWRS)
675 ASUS_HANDLE_INIT(wl_switch);
676 if(hwrs_result & BT_HWRS)
677 ASUS_HANDLE_INIT(bt_switch);
679 ASUS_HANDLE_INIT(wireless_status);
681 ASUS_HANDLE_INIT(brightness_set);
682 ASUS_HANDLE_INIT(brightness_get);
684 ASUS_HANDLE_INIT(lcd_switch);
691 static int asus_hotk_check(void)
695 result = acpi_bus_get_status(hotk->device);
699 if (hotk->device->status.present) {
700 result = asus_hotk_get_info();
702 printk(ASUS_ERR "Hotkey device not present, aborting\n");
709 static int asus_hotk_found;
711 static int asus_hotk_add(struct acpi_device *device)
713 acpi_status status = AE_OK;
719 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
720 ASUS_LAPTOP_VERSION);
722 hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
725 memset(hotk, 0, sizeof(struct asus_hotk));
727 hotk->handle = device->handle;
728 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
729 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
730 acpi_driver_data(device) = hotk;
731 hotk->device = device;
733 result = asus_hotk_check();
740 * We install the handler, it will receive the hotk in parameter, so, we
741 * could add other data to the hotk struct
743 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
744 asus_hotk_notify, hotk);
745 if (ACPI_FAILURE(status))
746 printk(ASUS_ERR "Error installing notify handler\n");
750 /* WLED and BLED are on by default */
751 write_status(bt_switch_handle, 1, BT_ON, 0);
752 write_status(wl_switch_handle, 1, WL_ON, 0);
754 /* LCD Backlight is on by default */
755 write_status(NULL, 1, LCD_ON, 0);
766 static int asus_hotk_remove(struct acpi_device *device, int type)
768 acpi_status status = 0;
770 if (!device || !acpi_driver_data(device))
773 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
775 if (ACPI_FAILURE(status))
776 printk(ASUS_ERR "Error removing notify handler\n");
784 static void asus_backlight_exit(void)
786 if(asus_backlight_device)
787 backlight_device_unregister(asus_backlight_device);
790 #define ASUS_LED_UNREGISTER(object) \
791 if(object##_led.class_dev \
792 && !IS_ERR(object##_led.class_dev)) \
793 led_classdev_unregister(&object##_led)
795 static void asus_led_exit(void)
797 ASUS_LED_UNREGISTER(mled);
798 ASUS_LED_UNREGISTER(tled);
799 ASUS_LED_UNREGISTER(pled);
800 ASUS_LED_UNREGISTER(rled);
802 destroy_workqueue(led_workqueue);
805 static void __exit asus_laptop_exit(void)
807 asus_backlight_exit();
810 acpi_bus_unregister_driver(&asus_hotk_driver);
811 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
812 platform_device_unregister(asuspf_device);
813 platform_driver_unregister(&asuspf_driver);
818 static int asus_backlight_init(struct device * dev)
820 struct backlight_device *bd;
822 if(brightness_set_handle && lcd_switch_handle) {
823 bd = backlight_device_register (ASUS_HOTK_FILE, dev,
827 "Could not register asus backlight device\n");
828 asus_backlight_device = NULL;
832 asus_backlight_device = bd;
835 if(likely(bd->props)) {
836 bd->props->brightness = read_brightness(NULL);
837 bd->props->power = FB_BLANK_UNBLANK;
838 if(likely(bd->props->update_status))
839 bd->props->update_status(bd);
846 static int asus_led_register(acpi_handle handle,
847 struct led_classdev * ldev,
853 return led_classdev_register(dev, ldev);
855 #define ASUS_LED_REGISTER(object, device) \
856 asus_led_register(object##_set_handle, &object##_led, device)
858 static int asus_led_init(struct device * dev)
862 rv = ASUS_LED_REGISTER(mled, dev);
866 rv = ASUS_LED_REGISTER(tled, dev);
870 rv = ASUS_LED_REGISTER(rled, dev);
874 rv = ASUS_LED_REGISTER(pled, dev);
878 led_workqueue = create_singlethread_workqueue("led_workqueue");
885 static int __init asus_laptop_init(void)
893 if (!acpi_specific_hotkey_enabled) {
894 printk(ASUS_ERR "Using generic hotkey driver\n");
898 result = acpi_bus_register_driver(&asus_hotk_driver);
903 * This is a bit of a kludge. We only want this module loaded
904 * for ASUS systems, but there's currently no way to probe the
905 * ACPI namespace for ASUS HIDs. So we just return failure if
906 * we didn't find one, which will cause the module to be
909 if (!asus_hotk_found) {
910 acpi_bus_unregister_driver(&asus_hotk_driver);
914 dev = acpi_get_physical_device(hotk->device->handle);
916 result = asus_backlight_init(dev);
920 result = asus_led_init(dev);
924 /* Register platform stuff */
925 result = platform_driver_register(&asuspf_driver);
927 goto fail_platform_driver;
929 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
930 if (!asuspf_device) {
932 goto fail_platform_device1;
935 result = platform_device_add(asuspf_device);
937 goto fail_platform_device2;
939 result = sysfs_create_group(&asuspf_device->dev.kobj,
940 &asuspf_attribute_group);
947 platform_device_del(asuspf_device);
949 fail_platform_device2:
950 platform_device_put(asuspf_device);
952 fail_platform_device1:
953 platform_driver_unregister(&asuspf_driver);
955 fail_platform_driver:
959 asus_backlight_exit();
966 module_init(asus_laptop_init);
967 module_exit(asus_laptop_exit);