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 ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP");
130 ASUS_HANDLE(display_get,
131 "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G
132 M6A M6V VX-1 V6J V6V W3Z */
133 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V
134 S5A M5A z33A W1Jc W2V */
135 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */
136 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */
137 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */
138 "\\_SB.PCI0.VGA.GETD", /* Z96F */
140 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
142 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
143 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
146 * This is the main structure, we can use it to store anything interesting
147 * about the hotk device
150 char *name; //laptop name
151 struct acpi_device *device; //the device we are in
152 acpi_handle handle; //the handle of the hotk device
153 char status; //status of the hotk, for LEDs, ...
154 u16 event_count[128]; //count for each event TODO make this better
158 * This header is made available to allow proper configuration given model,
159 * revision number , ... this info cannot go in struct asus_hotk because it is
160 * available before the hotk
162 static struct acpi_table_header *asus_info;
164 /* The actual device the driver binds to */
165 static struct asus_hotk *hotk;
168 * The hotkey driver declaration
170 static int asus_hotk_add(struct acpi_device *device);
171 static int asus_hotk_remove(struct acpi_device *device, int type);
172 static struct acpi_driver asus_hotk_driver = {
173 .name = ASUS_HOTK_NAME,
174 .class = ASUS_HOTK_CLASS,
175 .ids = ASUS_HOTK_HID,
177 .add = asus_hotk_add,
178 .remove = asus_hotk_remove,
182 /* The backlight device /sys/class/backlight */
183 static struct backlight_device *asus_backlight_device;
186 * The backlight class declaration
188 static int read_brightness(struct backlight_device *bd);
189 static int update_bl_status(struct backlight_device *bd);
190 static struct backlight_properties asusbl_data = {
191 .owner = THIS_MODULE,
192 .get_brightness = read_brightness,
193 .update_status = update_bl_status,
194 .max_brightness = 15,
197 /* These functions actually update the LED's, and are called from a
198 * workqueue. By doing this as separate work rather than when the LED
199 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
200 * potentially bad time, such as a timer interrupt. */
201 static struct workqueue_struct *led_workqueue;
203 #define ASUS_LED(object, ledname) \
204 static void object##_led_set(struct led_classdev *led_cdev, \
205 enum led_brightness value); \
206 static void object##_led_update(struct work_struct *ignored); \
207 static int object##_led_wk; \
208 DECLARE_WORK(object##_led_work, object##_led_update); \
209 static struct led_classdev object##_led = { \
210 .name = "asus:" ledname, \
211 .brightness_set = object##_led_set, \
214 ASUS_LED(mled, "mail");
215 ASUS_LED(tled, "touchpad");
216 ASUS_LED(rled, "record");
217 ASUS_LED(pled, "phone");
220 * This function evaluates an ACPI method, given an int as parameter, the
221 * method is searched within the scope of the handle, can be NULL. The output
222 * of the method is written is output, which can also be NULL
224 * returns 1 if write is successful, 0 else.
226 static int write_acpi_int(acpi_handle handle, const char *method, int val,
227 struct acpi_buffer *output)
229 struct acpi_object_list params; //list of input parameters (an int here)
230 union acpi_object in_obj; //the only param we use
234 params.pointer = &in_obj;
235 in_obj.type = ACPI_TYPE_INTEGER;
236 in_obj.integer.value = val;
238 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
239 return (status == AE_OK);
242 static int read_acpi_int(acpi_handle handle, const char *method, int *val,
243 struct acpi_object_list *params)
245 struct acpi_buffer output;
246 union acpi_object out_obj;
249 output.length = sizeof(out_obj);
250 output.pointer = &out_obj;
252 status = acpi_evaluate_object(handle, (char *)method, params, &output);
253 *val = out_obj.integer.value;
254 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
257 static int read_wireless_status(int mask) {
260 if (!wireless_status_handle)
261 return (hotk->status & mask) ? 1 : 0;
263 if (read_acpi_int(wireless_status_handle, NULL, &status, NULL)) {
264 return (status & mask) ? 1 : 0;
266 printk(ASUS_WARNING "Error reading Wireless status\n");
268 return (hotk->status & mask) ? 1 : 0;
271 /* Generic LED functions */
272 static int read_status(int mask)
274 /* There is a special method for both wireless devices */
275 if (mask == BT_ON || mask == WL_ON)
276 return read_wireless_status(mask);
278 return (hotk->status & mask) ? 1 : 0;
281 static void write_status(acpi_handle handle, int out, int mask,
284 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
286 if (invert) /* invert target value */
289 if (handle && !write_acpi_int(handle, NULL, out, NULL))
290 printk(ASUS_WARNING " write failed\n");
293 /* /sys/class/led handlers */
294 #define ASUS_LED_HANDLER(object, mask, invert) \
295 static void object##_led_set(struct led_classdev *led_cdev, \
296 enum led_brightness value) \
298 object##_led_wk = value; \
299 queue_work(led_workqueue, &object##_led_work); \
301 static void object##_led_update(struct work_struct *ignored) \
303 int value = object##_led_wk; \
304 write_status(object##_set_handle, value, (mask), (invert)); \
307 ASUS_LED_HANDLER(mled, MLED_ON, 1);
308 ASUS_LED_HANDLER(pled, PLED_ON, 0);
309 ASUS_LED_HANDLER(rled, RLED_ON, 0);
310 ASUS_LED_HANDLER(tled, TLED_ON, 0);
312 static int get_lcd_state(void)
314 return read_status(LCD_ON);
317 static int set_lcd_state(int value)
320 acpi_status status = 0;
324 if (lcd == get_lcd_state())
327 if(lcd_switch_handle) {
328 status = acpi_evaluate_object(lcd_switch_handle,
331 if (ACPI_FAILURE(status))
332 printk(ASUS_WARNING "Error switching LCD\n");
335 write_status(NULL, lcd, LCD_ON, 0);
339 static void lcd_blank(int blank)
341 struct backlight_device *bd = asus_backlight_device;
345 if(likely(bd->props)) {
346 bd->props->power = blank;
347 if(likely(bd->props->update_status))
348 bd->props->update_status(bd);
354 static int read_brightness(struct backlight_device *bd)
358 if (!read_acpi_int(brightness_get_handle, NULL, &value, NULL))
359 printk(ASUS_WARNING "Error reading brightness\n");
364 static int set_brightness(struct backlight_device *bd, int value)
368 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
369 /* 0 <= value <= 15 */
371 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
372 printk(ASUS_WARNING "Error changing brightness\n");
379 static int update_bl_status(struct backlight_device *bd)
382 int value = bd->props->brightness;
384 rv = set_brightness(bd, value);
388 value = (bd->props->power == FB_BLANK_UNBLANK) ? 1 : 0;
389 return set_lcd_state(value);
393 * Platform device handlers
397 * We write our info in page, we begin at offset off and cannot write more
398 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
399 * number of bytes written in page
401 static ssize_t show_infos(struct device *dev,
402 struct device_attribute *attr, char *page)
406 char buf[16]; //enough for all info
408 * We use the easy way, we don't care of off and count, so we don't set eof
412 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
413 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
415 * The SFUN method probably allows the original driver to get the list
416 * of features supported by a given model. For now, 0x0100 or 0x0800
417 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
418 * The significance of others is yet to be found.
420 if (read_acpi_int(hotk->handle, "SFUN", &temp, NULL))
422 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
424 * Another value for userspace: the ASYM method returns 0x02 for
425 * battery low and 0x04 for battery critical, its readings tend to be
426 * more accurate than those provided by _BST.
427 * Note: since not all the laptops provide this method, errors are
430 if (read_acpi_int(hotk->handle, "ASYM", &temp, NULL))
432 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
434 snprintf(buf, 16, "%d", asus_info->length);
435 len += sprintf(page + len, "DSDT length : %s\n", buf);
436 snprintf(buf, 16, "%d", asus_info->checksum);
437 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
438 snprintf(buf, 16, "%d", asus_info->revision);
439 len += sprintf(page + len, "DSDT revision : %s\n", buf);
440 snprintf(buf, 7, "%s", asus_info->oem_id);
441 len += sprintf(page + len, "OEM id : %s\n", buf);
442 snprintf(buf, 9, "%s", asus_info->oem_table_id);
443 len += sprintf(page + len, "OEM table id : %s\n", buf);
444 snprintf(buf, 16, "%x", asus_info->oem_revision);
445 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
446 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
447 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
448 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
449 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
455 static int parse_arg(const char *buf, unsigned long count, int *val)
461 if (sscanf(buf, "%i", val) != 1)
466 static ssize_t store_status(const char *buf, size_t count,
467 acpi_handle handle, int mask, int invert)
472 rv = parse_arg(buf, count, &value);
476 write_status(handle, out, mask, invert);
484 static ssize_t show_wlan(struct device *dev,
485 struct device_attribute *attr, char *buf)
487 return sprintf(buf, "%d\n", read_status(WL_ON));
490 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
491 const char *buf, size_t count)
493 return store_status(buf, count, wl_switch_handle, WL_ON, 0);
499 static ssize_t show_bluetooth(struct device *dev,
500 struct device_attribute *attr, char *buf)
502 return sprintf(buf, "%d\n", read_status(BT_ON));
505 static ssize_t store_bluetooth(struct device *dev, struct device_attribute *attr,
506 const char *buf, size_t count)
508 return store_status(buf, count, bt_switch_handle, BT_ON, 0);
514 static void set_display(int value)
516 /* no sanity check needed for now */
517 if (!write_acpi_int(display_set_handle, NULL, value, NULL))
518 printk(ASUS_WARNING "Error setting display\n");
522 static int read_display(void)
526 /* In most of the case, we know how to set the display, but sometime
528 if(display_get_handle) {
529 if (!read_acpi_int(display_get_handle, NULL, &value, NULL))
530 printk(ASUS_WARNING "Error reading display status\n");
533 value &= 0x0F; /* needed for some models, shouldn't hurt others */
538 * Now, *this* one could be more user-friendly, but so far, no-one has
539 * complained. The significance of bits is the same as in store_disp()
541 static ssize_t show_disp(struct device *dev,
542 struct device_attribute *attr, char *buf)
544 return sprintf(buf, "%d\n", read_display());
548 * Experimental support for display switching. As of now: 1 should activate
549 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
550 * Any combination (bitwise) of these will suffice. I never actually tested 4
551 * displays hooked up simultaneously, so be warned. See the acpi4asus README
554 static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
555 const char *buf, size_t count)
559 rv = parse_arg(buf, count, &value);
565 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
567 /* TODO Find a better way to handle events count. */
572 * We need to tell the backlight device when the backlight power is
575 if (event == ATKD_LCD_ON) {
576 write_status(NULL, 1, LCD_ON, 0);
577 lcd_blank(FB_BLANK_UNBLANK);
578 } else if(event == ATKD_LCD_OFF) {
579 write_status(NULL, 0, LCD_ON, 0);
580 lcd_blank(FB_BLANK_POWERDOWN);
583 acpi_bus_generate_event(hotk->device, event,
584 hotk->event_count[event % 128]++);
589 #define ASUS_CREATE_DEVICE_ATTR(_name) \
590 struct device_attribute dev_attr_##_name = { \
592 .name = __stringify(_name), \
594 .owner = THIS_MODULE }, \
599 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
601 dev_attr_##_name.attr.mode = _mode; \
602 dev_attr_##_name.show = _show; \
603 dev_attr_##_name.store = _store; \
606 static ASUS_CREATE_DEVICE_ATTR(infos);
607 static ASUS_CREATE_DEVICE_ATTR(wlan);
608 static ASUS_CREATE_DEVICE_ATTR(bluetooth);
609 static ASUS_CREATE_DEVICE_ATTR(display);
611 static struct attribute *asuspf_attributes[] = {
612 &dev_attr_infos.attr,
614 &dev_attr_bluetooth.attr,
615 &dev_attr_display.attr,
619 static struct attribute_group asuspf_attribute_group = {
620 .attrs = asuspf_attributes
623 static struct platform_driver asuspf_driver = {
625 .name = ASUS_HOTK_FILE,
626 .owner = THIS_MODULE,
630 static struct platform_device *asuspf_device;
633 static void asus_hotk_add_fs(void)
635 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
637 if (wl_switch_handle)
638 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
640 if (bt_switch_handle)
641 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
642 show_bluetooth, store_bluetooth);
644 if (display_set_handle && display_get_handle)
645 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
646 else if(display_set_handle)
647 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
651 static int asus_handle_init(char *name, acpi_handle *handle,
652 char **paths, int num_paths)
657 for (i = 0; i < num_paths; i++) {
658 status = acpi_get_handle(NULL, paths[i], handle);
659 if (ACPI_SUCCESS(status))
667 #define ASUS_HANDLE_INIT(object) \
668 asus_handle_init(#object, &object##_handle, object##_paths, \
669 ARRAY_SIZE(object##_paths))
673 * This function is used to initialize the hotk with right values. In this
674 * method, we can make all the detection we want, and modify the hotk struct
676 static int asus_hotk_get_info(void)
678 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
679 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
680 union acpi_object *model = NULL;
681 int bsts_result, hwrs_result;
686 * Get DSDT headers early enough to allow for differentiating between
687 * models, but late enough to allow acpi_bus_register_driver() to fail
688 * before doing anything ACPI-specific. Should we encounter a machine,
689 * which needs special handling (i.e. its hotkey device has a different
690 * HID), this bit will be moved. A global variable asus_info contains
693 status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
694 if (ACPI_FAILURE(status))
695 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
697 asus_info = dsdt.pointer;
699 /* We have to write 0 on init this far for all ASUS models */
700 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
701 printk(ASUS_ERR "Hotkey initialization failed\n");
705 /* This needs to be called for some laptops to init properly */
706 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result, NULL))
707 printk(ASUS_WARNING "Error calling BSTS\n");
708 else if (bsts_result)
709 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
713 * Try to match the object returned by INIT to the specific model.
714 * Handle every possible object (or the lack of thereof) the DSDT
715 * writers might throw at us. When in trouble, we pass NULL to
716 * asus_model_match() and try something completely different.
718 if (buffer.pointer) {
719 model = buffer.pointer;
720 switch (model->type) {
721 case ACPI_TYPE_STRING:
722 string = model->string.pointer;
724 case ACPI_TYPE_BUFFER:
725 string = model->buffer.pointer;
732 hotk->name = kstrdup(string, GFP_KERNEL);
737 printk(ASUS_NOTICE " %s model detected\n", string);
739 ASUS_HANDLE_INIT(mled_set);
740 ASUS_HANDLE_INIT(tled_set);
741 ASUS_HANDLE_INIT(rled_set);
742 ASUS_HANDLE_INIT(pled_set);
745 * The HWRS method return informations about the hardware.
746 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
747 * The significance of others is yet to be found.
748 * If we don't find the method, we assume the device are present.
750 if (!read_acpi_int(hotk->handle, "HRWS", &hwrs_result, NULL))
751 hwrs_result = WL_HWRS | BT_HWRS;
753 if(hwrs_result & WL_HWRS)
754 ASUS_HANDLE_INIT(wl_switch);
755 if(hwrs_result & BT_HWRS)
756 ASUS_HANDLE_INIT(bt_switch);
758 ASUS_HANDLE_INIT(wireless_status);
760 ASUS_HANDLE_INIT(brightness_set);
761 ASUS_HANDLE_INIT(brightness_get);
763 ASUS_HANDLE_INIT(lcd_switch);
765 ASUS_HANDLE_INIT(display_set);
766 ASUS_HANDLE_INIT(display_get);
773 static int asus_hotk_check(void)
777 result = acpi_bus_get_status(hotk->device);
781 if (hotk->device->status.present) {
782 result = asus_hotk_get_info();
784 printk(ASUS_ERR "Hotkey device not present, aborting\n");
791 static int asus_hotk_found;
793 static int asus_hotk_add(struct acpi_device *device)
795 acpi_status status = AE_OK;
801 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
802 ASUS_LAPTOP_VERSION);
804 hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
807 memset(hotk, 0, sizeof(struct asus_hotk));
809 hotk->handle = device->handle;
810 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
811 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
812 acpi_driver_data(device) = hotk;
813 hotk->device = device;
815 result = asus_hotk_check();
822 * We install the handler, it will receive the hotk in parameter, so, we
823 * could add other data to the hotk struct
825 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
826 asus_hotk_notify, hotk);
827 if (ACPI_FAILURE(status))
828 printk(ASUS_ERR "Error installing notify handler\n");
832 /* WLED and BLED are on by default */
833 write_status(bt_switch_handle, 1, BT_ON, 0);
834 write_status(wl_switch_handle, 1, WL_ON, 0);
836 /* LCD Backlight is on by default */
837 write_status(NULL, 1, LCD_ON, 0);
848 static int asus_hotk_remove(struct acpi_device *device, int type)
850 acpi_status status = 0;
852 if (!device || !acpi_driver_data(device))
855 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
857 if (ACPI_FAILURE(status))
858 printk(ASUS_ERR "Error removing notify handler\n");
866 static void asus_backlight_exit(void)
868 if(asus_backlight_device)
869 backlight_device_unregister(asus_backlight_device);
872 #define ASUS_LED_UNREGISTER(object) \
873 if(object##_led.class_dev \
874 && !IS_ERR(object##_led.class_dev)) \
875 led_classdev_unregister(&object##_led)
877 static void asus_led_exit(void)
879 ASUS_LED_UNREGISTER(mled);
880 ASUS_LED_UNREGISTER(tled);
881 ASUS_LED_UNREGISTER(pled);
882 ASUS_LED_UNREGISTER(rled);
884 destroy_workqueue(led_workqueue);
887 static void __exit asus_laptop_exit(void)
889 asus_backlight_exit();
892 acpi_bus_unregister_driver(&asus_hotk_driver);
893 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
894 platform_device_unregister(asuspf_device);
895 platform_driver_unregister(&asuspf_driver);
900 static int asus_backlight_init(struct device * dev)
902 struct backlight_device *bd;
904 if(brightness_set_handle && lcd_switch_handle) {
905 bd = backlight_device_register (ASUS_HOTK_FILE, dev,
909 "Could not register asus backlight device\n");
910 asus_backlight_device = NULL;
914 asus_backlight_device = bd;
917 if(likely(bd->props)) {
918 bd->props->brightness = read_brightness(NULL);
919 bd->props->power = FB_BLANK_UNBLANK;
920 if(likely(bd->props->update_status))
921 bd->props->update_status(bd);
928 static int asus_led_register(acpi_handle handle,
929 struct led_classdev * ldev,
935 return led_classdev_register(dev, ldev);
937 #define ASUS_LED_REGISTER(object, device) \
938 asus_led_register(object##_set_handle, &object##_led, device)
940 static int asus_led_init(struct device * dev)
944 rv = ASUS_LED_REGISTER(mled, dev);
948 rv = ASUS_LED_REGISTER(tled, dev);
952 rv = ASUS_LED_REGISTER(rled, dev);
956 rv = ASUS_LED_REGISTER(pled, dev);
960 led_workqueue = create_singlethread_workqueue("led_workqueue");
967 static int __init asus_laptop_init(void)
975 if (!acpi_specific_hotkey_enabled) {
976 printk(ASUS_ERR "Using generic hotkey driver\n");
980 result = acpi_bus_register_driver(&asus_hotk_driver);
985 * This is a bit of a kludge. We only want this module loaded
986 * for ASUS systems, but there's currently no way to probe the
987 * ACPI namespace for ASUS HIDs. So we just return failure if
988 * we didn't find one, which will cause the module to be
991 if (!asus_hotk_found) {
992 acpi_bus_unregister_driver(&asus_hotk_driver);
996 dev = acpi_get_physical_device(hotk->device->handle);
998 result = asus_backlight_init(dev);
1000 goto fail_backlight;
1002 result = asus_led_init(dev);
1006 /* Register platform stuff */
1007 result = platform_driver_register(&asuspf_driver);
1009 goto fail_platform_driver;
1011 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
1012 if (!asuspf_device) {
1014 goto fail_platform_device1;
1017 result = platform_device_add(asuspf_device);
1019 goto fail_platform_device2;
1021 result = sysfs_create_group(&asuspf_device->dev.kobj,
1022 &asuspf_attribute_group);
1029 platform_device_del(asuspf_device);
1031 fail_platform_device2:
1032 platform_device_put(asuspf_device);
1034 fail_platform_device1:
1035 platform_driver_unregister(&asuspf_driver);
1037 fail_platform_driver:
1041 asus_backlight_exit();
1048 module_init(asus_laptop_init);
1049 module_exit(asus_laptop_exit);