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_ops asusbl_ops = {
199 .get_brightness = read_brightness,
200 .update_status = update_bl_status,
203 /* These functions actually update the LED's, and are called from a
204 * workqueue. By doing this as separate work rather than when the LED
205 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
206 * potentially bad time, such as a timer interrupt. */
207 static struct workqueue_struct *led_workqueue;
209 #define ASUS_LED(object, ledname) \
210 static void object##_led_set(struct led_classdev *led_cdev, \
211 enum led_brightness value); \
212 static void object##_led_update(struct work_struct *ignored); \
213 static int object##_led_wk; \
214 static DECLARE_WORK(object##_led_work, object##_led_update); \
215 static struct led_classdev object##_led = { \
216 .name = "asus:" ledname, \
217 .brightness_set = object##_led_set, \
220 ASUS_LED(mled, "mail");
221 ASUS_LED(tled, "touchpad");
222 ASUS_LED(rled, "record");
223 ASUS_LED(pled, "phone");
226 * This function evaluates an ACPI method, given an int as parameter, the
227 * method is searched within the scope of the handle, can be NULL. The output
228 * of the method is written is output, which can also be NULL
230 * returns 1 if write is successful, 0 else.
232 static int write_acpi_int(acpi_handle handle, const char *method, int val,
233 struct acpi_buffer *output)
235 struct acpi_object_list params; //list of input parameters (an int here)
236 union acpi_object in_obj; //the only param we use
240 params.pointer = &in_obj;
241 in_obj.type = ACPI_TYPE_INTEGER;
242 in_obj.integer.value = val;
244 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
245 return (status == AE_OK);
248 static int read_wireless_status(int mask)
251 acpi_status rv = AE_OK;
253 if (!wireless_status_handle)
254 return (hotk->status & mask) ? 1 : 0;
256 rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status);
257 if (ACPI_FAILURE(rv))
258 printk(ASUS_WARNING "Error reading Wireless status\n");
260 return (status & mask) ? 1 : 0;
262 return (hotk->status & mask) ? 1 : 0;
265 /* Generic LED functions */
266 static int read_status(int mask)
268 /* There is a special method for both wireless devices */
269 if (mask == BT_ON || mask == WL_ON)
270 return read_wireless_status(mask);
272 return (hotk->status & mask) ? 1 : 0;
275 static void write_status(acpi_handle handle, int out, int mask)
277 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
288 if (handle && !write_acpi_int(handle, NULL, out, NULL))
289 printk(ASUS_WARNING " write failed %x\n", mask);
292 /* /sys/class/led handlers */
293 #define ASUS_LED_HANDLER(object, mask) \
294 static void object##_led_set(struct led_classdev *led_cdev, \
295 enum led_brightness value) \
297 object##_led_wk = value; \
298 queue_work(led_workqueue, &object##_led_work); \
300 static void object##_led_update(struct work_struct *ignored) \
302 int value = object##_led_wk; \
303 write_status(object##_set_handle, value, (mask)); \
306 ASUS_LED_HANDLER(mled, MLED_ON);
307 ASUS_LED_HANDLER(pled, PLED_ON);
308 ASUS_LED_HANDLER(rled, RLED_ON);
309 ASUS_LED_HANDLER(tled, TLED_ON);
311 static int get_lcd_state(void)
313 return read_status(LCD_ON);
316 static int set_lcd_state(int value)
319 acpi_status status = 0;
323 if (lcd == get_lcd_state())
326 if (lcd_switch_handle) {
327 status = acpi_evaluate_object(lcd_switch_handle,
330 if (ACPI_FAILURE(status))
331 printk(ASUS_WARNING "Error switching LCD\n");
334 write_status(NULL, lcd, LCD_ON);
338 static void lcd_blank(int blank)
340 struct backlight_device *bd = asus_backlight_device;
343 bd->props.power = blank;
344 backlight_update_status(bd);
348 static int read_brightness(struct backlight_device *bd)
351 acpi_status rv = AE_OK;
353 rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value);
354 if (ACPI_FAILURE(rv))
355 printk(ASUS_WARNING "Error reading brightness\n");
360 static int set_brightness(struct backlight_device *bd, int value)
364 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
365 /* 0 <= value <= 15 */
367 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
368 printk(ASUS_WARNING "Error changing brightness\n");
375 static int update_bl_status(struct backlight_device *bd)
378 int value = bd->props.brightness;
380 rv = set_brightness(bd, value);
384 value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0;
385 return set_lcd_state(value);
389 * Platform device handlers
393 * We write our info in page, we begin at offset off and cannot write more
394 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
395 * number of bytes written in page
397 static ssize_t show_infos(struct device *dev,
398 struct device_attribute *attr, char *page)
402 char buf[16]; //enough for all info
403 acpi_status rv = AE_OK;
406 * We use the easy way, we don't care of off and count, so we don't set eof
410 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
411 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
413 * The SFUN method probably allows the original driver to get the list
414 * of features supported by a given model. For now, 0x0100 or 0x0800
415 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
416 * The significance of others is yet to be found.
418 rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp);
419 if (!ACPI_FAILURE(rv))
420 len += sprintf(page + len, "SFUN value : 0x%04x\n",
423 * Another value for userspace: the ASYM method returns 0x02 for
424 * battery low and 0x04 for battery critical, its readings tend to be
425 * more accurate than those provided by _BST.
426 * Note: since not all the laptops provide this method, errors are
429 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp);
430 if (!ACPI_FAILURE(rv))
431 len += sprintf(page + len, "ASYM value : 0x%04x\n",
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)
472 rv = parse_arg(buf, count, &value);
476 write_status(handle, out, mask);
484 static ssize_t show_ledd(struct device *dev,
485 struct device_attribute *attr, char *buf)
487 return sprintf(buf, "0x%08x\n", hotk->ledd_status);
490 static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
491 const char *buf, size_t count)
495 rv = parse_arg(buf, count, &value);
497 if (!write_acpi_int(ledd_set_handle, NULL, value, NULL))
498 printk(ASUS_WARNING "LED display write failed\n");
500 hotk->ledd_status = (u32) value;
508 static ssize_t show_wlan(struct device *dev,
509 struct device_attribute *attr, char *buf)
511 return sprintf(buf, "%d\n", read_status(WL_ON));
514 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
515 const char *buf, size_t count)
517 return store_status(buf, count, wl_switch_handle, WL_ON);
523 static ssize_t show_bluetooth(struct device *dev,
524 struct device_attribute *attr, char *buf)
526 return sprintf(buf, "%d\n", read_status(BT_ON));
529 static ssize_t store_bluetooth(struct device *dev,
530 struct device_attribute *attr, const char *buf,
533 return store_status(buf, count, bt_switch_handle, BT_ON);
539 static void set_display(int value)
541 /* no sanity check needed for now */
542 if (!write_acpi_int(display_set_handle, NULL, value, NULL))
543 printk(ASUS_WARNING "Error setting display\n");
547 static int read_display(void)
550 acpi_status rv = AE_OK;
552 /* In most of the case, we know how to set the display, but sometime
554 if (display_get_handle) {
555 rv = acpi_evaluate_integer(display_get_handle, NULL,
557 if (ACPI_FAILURE(rv))
558 printk(ASUS_WARNING "Error reading display status\n");
561 value &= 0x0F; /* needed for some models, shouldn't hurt others */
567 * Now, *this* one could be more user-friendly, but so far, no-one has
568 * complained. The significance of bits is the same as in store_disp()
570 static ssize_t show_disp(struct device *dev,
571 struct device_attribute *attr, char *buf)
573 return sprintf(buf, "%d\n", read_display());
577 * Experimental support for display switching. As of now: 1 should activate
578 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
579 * Any combination (bitwise) of these will suffice. I never actually tested 4
580 * displays hooked up simultaneously, so be warned. See the acpi4asus README
583 static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
584 const char *buf, size_t count)
588 rv = parse_arg(buf, count, &value);
597 static void set_light_sens_switch(int value)
599 if (!write_acpi_int(ls_switch_handle, NULL, value, NULL))
600 printk(ASUS_WARNING "Error setting light sensor switch\n");
601 hotk->light_switch = value;
604 static ssize_t show_lssw(struct device *dev,
605 struct device_attribute *attr, char *buf)
607 return sprintf(buf, "%d\n", hotk->light_switch);
610 static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
611 const char *buf, size_t count)
615 rv = parse_arg(buf, count, &value);
617 set_light_sens_switch(value ? 1 : 0);
622 static void set_light_sens_level(int value)
624 if (!write_acpi_int(ls_level_handle, NULL, value, NULL))
625 printk(ASUS_WARNING "Error setting light sensor level\n");
626 hotk->light_level = value;
629 static ssize_t show_lslvl(struct device *dev,
630 struct device_attribute *attr, char *buf)
632 return sprintf(buf, "%d\n", hotk->light_level);
635 static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
636 const char *buf, size_t count)
640 rv = parse_arg(buf, count, &value);
642 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
643 /* 0 <= value <= 15 */
644 set_light_sens_level(value);
650 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
652 /* TODO Find a better way to handle events count. */
657 * We need to tell the backlight device when the backlight power is
660 if (event == ATKD_LCD_ON) {
661 write_status(NULL, 1, LCD_ON);
662 lcd_blank(FB_BLANK_UNBLANK);
663 } else if (event == ATKD_LCD_OFF) {
664 write_status(NULL, 0, LCD_ON);
665 lcd_blank(FB_BLANK_POWERDOWN);
668 acpi_bus_generate_event(hotk->device, event,
669 hotk->event_count[event % 128]++);
674 #define ASUS_CREATE_DEVICE_ATTR(_name) \
675 struct device_attribute dev_attr_##_name = { \
677 .name = __stringify(_name), \
679 .owner = THIS_MODULE }, \
684 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
686 dev_attr_##_name.attr.mode = _mode; \
687 dev_attr_##_name.show = _show; \
688 dev_attr_##_name.store = _store; \
691 static ASUS_CREATE_DEVICE_ATTR(infos);
692 static ASUS_CREATE_DEVICE_ATTR(wlan);
693 static ASUS_CREATE_DEVICE_ATTR(bluetooth);
694 static ASUS_CREATE_DEVICE_ATTR(display);
695 static ASUS_CREATE_DEVICE_ATTR(ledd);
696 static ASUS_CREATE_DEVICE_ATTR(ls_switch);
697 static ASUS_CREATE_DEVICE_ATTR(ls_level);
699 static struct attribute *asuspf_attributes[] = {
700 &dev_attr_infos.attr,
702 &dev_attr_bluetooth.attr,
703 &dev_attr_display.attr,
705 &dev_attr_ls_switch.attr,
706 &dev_attr_ls_level.attr,
710 static struct attribute_group asuspf_attribute_group = {
711 .attrs = asuspf_attributes
714 static struct platform_driver asuspf_driver = {
716 .name = ASUS_HOTK_FILE,
717 .owner = THIS_MODULE,
721 static struct platform_device *asuspf_device;
723 static void asus_hotk_add_fs(void)
725 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
727 if (wl_switch_handle)
728 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
730 if (bt_switch_handle)
731 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
732 show_bluetooth, store_bluetooth);
734 if (display_set_handle && display_get_handle)
735 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
736 else if (display_set_handle)
737 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
740 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);
742 if (ls_switch_handle && ls_level_handle) {
743 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
744 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
748 static int asus_handle_init(char *name, acpi_handle * handle,
749 char **paths, int num_paths)
754 for (i = 0; i < num_paths; i++) {
755 status = acpi_get_handle(NULL, paths[i], handle);
756 if (ACPI_SUCCESS(status))
764 #define ASUS_HANDLE_INIT(object) \
765 asus_handle_init(#object, &object##_handle, object##_paths, \
766 ARRAY_SIZE(object##_paths))
769 * This function is used to initialize the hotk with right values. In this
770 * method, we can make all the detection we want, and modify the hotk struct
772 static int asus_hotk_get_info(void)
774 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
775 union acpi_object *model = NULL;
776 ulong bsts_result, hwrs_result;
781 * Get DSDT headers early enough to allow for differentiating between
782 * models, but late enough to allow acpi_bus_register_driver() to fail
783 * before doing anything ACPI-specific. Should we encounter a machine,
784 * which needs special handling (i.e. its hotkey device has a different
785 * HID), this bit will be moved. A global variable asus_info contains
788 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
789 if (ACPI_FAILURE(status))
790 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
792 /* We have to write 0 on init this far for all ASUS models */
793 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
794 printk(ASUS_ERR "Hotkey initialization failed\n");
798 /* This needs to be called for some laptops to init properly */
800 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result);
801 if (ACPI_FAILURE(status))
802 printk(ASUS_WARNING "Error calling BSTS\n");
803 else if (bsts_result)
804 printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
808 * Try to match the object returned by INIT to the specific model.
809 * Handle every possible object (or the lack of thereof) the DSDT
810 * writers might throw at us. When in trouble, we pass NULL to
811 * asus_model_match() and try something completely different.
813 if (buffer.pointer) {
814 model = buffer.pointer;
815 switch (model->type) {
816 case ACPI_TYPE_STRING:
817 string = model->string.pointer;
819 case ACPI_TYPE_BUFFER:
820 string = model->buffer.pointer;
827 hotk->name = kstrdup(string, GFP_KERNEL);
832 printk(ASUS_NOTICE " %s model detected\n", string);
834 ASUS_HANDLE_INIT(mled_set);
835 ASUS_HANDLE_INIT(tled_set);
836 ASUS_HANDLE_INIT(rled_set);
837 ASUS_HANDLE_INIT(pled_set);
839 ASUS_HANDLE_INIT(ledd_set);
842 * The HWRS method return informations about the hardware.
843 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
844 * The significance of others is yet to be found.
845 * If we don't find the method, we assume the device are present.
848 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result);
849 if (ACPI_FAILURE(status))
850 hwrs_result = WL_HWRS | BT_HWRS;
852 if (hwrs_result & WL_HWRS)
853 ASUS_HANDLE_INIT(wl_switch);
854 if (hwrs_result & BT_HWRS)
855 ASUS_HANDLE_INIT(bt_switch);
857 ASUS_HANDLE_INIT(wireless_status);
859 ASUS_HANDLE_INIT(brightness_set);
860 ASUS_HANDLE_INIT(brightness_get);
862 ASUS_HANDLE_INIT(lcd_switch);
864 ASUS_HANDLE_INIT(display_set);
865 ASUS_HANDLE_INIT(display_get);
867 /* There is a lot of models with "ALSL", but a few get
868 a real light sens, so we need to check it. */
869 if (ASUS_HANDLE_INIT(ls_switch))
870 ASUS_HANDLE_INIT(ls_level);
877 static int asus_hotk_check(void)
881 result = acpi_bus_get_status(hotk->device);
885 if (hotk->device->status.present) {
886 result = asus_hotk_get_info();
888 printk(ASUS_ERR "Hotkey device not present, aborting\n");
895 static int asus_hotk_found;
897 static int asus_hotk_add(struct acpi_device *device)
899 acpi_status status = AE_OK;
905 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
906 ASUS_LAPTOP_VERSION);
908 hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
911 memset(hotk, 0, sizeof(struct asus_hotk));
913 hotk->handle = device->handle;
914 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
915 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
916 acpi_driver_data(device) = hotk;
917 hotk->device = device;
919 result = asus_hotk_check();
926 * We install the handler, it will receive the hotk in parameter, so, we
927 * could add other data to the hotk struct
929 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
930 asus_hotk_notify, hotk);
931 if (ACPI_FAILURE(status))
932 printk(ASUS_ERR "Error installing notify handler\n");
936 /* WLED and BLED are on by default */
937 write_status(bt_switch_handle, 1, BT_ON);
938 write_status(wl_switch_handle, 1, WL_ON);
940 /* If the h/w switch is off, we need to check the real status */
941 write_status(NULL, read_status(BT_ON), BT_ON);
942 write_status(NULL, read_status(WL_ON), WL_ON);
944 /* LCD Backlight is on by default */
945 write_status(NULL, 1, LCD_ON);
947 /* LED display is off by default */
948 hotk->ledd_status = 0xFFF;
950 /* Set initial values of light sensor and level */
951 hotk->light_switch = 1; /* Default to light sensor disabled */
952 hotk->light_level = 0; /* level 5 for sensor sensitivity */
954 if (ls_switch_handle)
955 set_light_sens_switch(hotk->light_switch);
958 set_light_sens_level(hotk->light_level);
969 static int asus_hotk_remove(struct acpi_device *device, int type)
971 acpi_status status = 0;
973 if (!device || !acpi_driver_data(device))
976 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
978 if (ACPI_FAILURE(status))
979 printk(ASUS_ERR "Error removing notify handler\n");
987 static void asus_backlight_exit(void)
989 if (asus_backlight_device)
990 backlight_device_unregister(asus_backlight_device);
993 #define ASUS_LED_UNREGISTER(object) \
994 if(object##_led.class_dev \
995 && !IS_ERR(object##_led.class_dev)) \
996 led_classdev_unregister(&object##_led)
998 static void asus_led_exit(void)
1000 ASUS_LED_UNREGISTER(mled);
1001 ASUS_LED_UNREGISTER(tled);
1002 ASUS_LED_UNREGISTER(pled);
1003 ASUS_LED_UNREGISTER(rled);
1005 destroy_workqueue(led_workqueue);
1008 static void __exit asus_laptop_exit(void)
1010 asus_backlight_exit();
1013 acpi_bus_unregister_driver(&asus_hotk_driver);
1014 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
1015 platform_device_unregister(asuspf_device);
1016 platform_driver_unregister(&asuspf_driver);
1019 static int asus_backlight_init(struct device *dev)
1021 struct backlight_device *bd;
1023 if (brightness_set_handle && lcd_switch_handle) {
1024 bd = backlight_device_register(ASUS_HOTK_FILE, dev,
1028 "Could not register asus backlight device\n");
1029 asus_backlight_device = NULL;
1033 asus_backlight_device = bd;
1035 bd->props.max_brightness = 15;
1036 bd->props.brightness = read_brightness(NULL);
1037 bd->props.power = FB_BLANK_UNBLANK;
1038 backlight_update_status(bd);
1043 static int asus_led_register(acpi_handle handle,
1044 struct led_classdev *ldev, struct device *dev)
1049 return led_classdev_register(dev, ldev);
1052 #define ASUS_LED_REGISTER(object, device) \
1053 asus_led_register(object##_set_handle, &object##_led, device)
1055 static int asus_led_init(struct device *dev)
1059 rv = ASUS_LED_REGISTER(mled, dev);
1063 rv = ASUS_LED_REGISTER(tled, dev);
1067 rv = ASUS_LED_REGISTER(rled, dev);
1071 rv = ASUS_LED_REGISTER(pled, dev);
1075 led_workqueue = create_singlethread_workqueue("led_workqueue");
1082 static int __init asus_laptop_init(void)
1090 result = acpi_bus_register_driver(&asus_hotk_driver);
1095 * This is a bit of a kludge. We only want this module loaded
1096 * for ASUS systems, but there's currently no way to probe the
1097 * ACPI namespace for ASUS HIDs. So we just return failure if
1098 * we didn't find one, which will cause the module to be
1101 if (!asus_hotk_found) {
1102 acpi_bus_unregister_driver(&asus_hotk_driver);
1106 dev = acpi_get_physical_device(hotk->device->handle);
1108 result = asus_backlight_init(dev);
1110 goto fail_backlight;
1112 result = asus_led_init(dev);
1116 /* Register platform stuff */
1117 result = platform_driver_register(&asuspf_driver);
1119 goto fail_platform_driver;
1121 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
1122 if (!asuspf_device) {
1124 goto fail_platform_device1;
1127 result = platform_device_add(asuspf_device);
1129 goto fail_platform_device2;
1131 result = sysfs_create_group(&asuspf_device->dev.kobj,
1132 &asuspf_attribute_group);
1139 platform_device_del(asuspf_device);
1141 fail_platform_device2:
1142 platform_device_put(asuspf_device);
1144 fail_platform_device1:
1145 platform_driver_unregister(&asuspf_driver);
1147 fail_platform_driver:
1151 asus_backlight_exit();
1158 module_init(asus_laptop_init);
1159 module_exit(asus_laptop_exit);