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,
134 "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G
135 M6A M6V VX-1 V6J V6V W3Z */
136 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V
137 S5A M5A z33A W1Jc W2V */
138 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */
139 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */
140 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */
141 "\\_SB.PCI0.VGA.GETD", /* Z96F */
143 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
145 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
146 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
148 ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */
149 ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
152 * This is the main structure, we can use it to store anything interesting
153 * about the hotk device
156 char *name; //laptop name
157 struct acpi_device *device; //the device we are in
158 acpi_handle handle; //the handle of the hotk device
159 char status; //status of the hotk, for LEDs, ...
160 u32 ledd_status; //status of the LED display
161 u8 light_level; //light sensor level
162 u8 light_switch; //light sensor switch value
163 u16 event_count[128]; //count for each event TODO make this better
167 * This header is made available to allow proper configuration given model,
168 * revision number , ... this info cannot go in struct asus_hotk because it is
169 * available before the hotk
171 static struct acpi_table_header *asus_info;
173 /* The actual device the driver binds to */
174 static struct asus_hotk *hotk;
177 * The hotkey driver declaration
179 static int asus_hotk_add(struct acpi_device *device);
180 static int asus_hotk_remove(struct acpi_device *device, int type);
181 static struct acpi_driver asus_hotk_driver = {
182 .name = ASUS_HOTK_NAME,
183 .class = ASUS_HOTK_CLASS,
184 .ids = ASUS_HOTK_HID,
186 .add = asus_hotk_add,
187 .remove = asus_hotk_remove,
191 /* The backlight device /sys/class/backlight */
192 static struct backlight_device *asus_backlight_device;
195 * The backlight class declaration
197 static int read_brightness(struct backlight_device *bd);
198 static int update_bl_status(struct backlight_device *bd);
199 static struct backlight_properties asusbl_data = {
200 .owner = THIS_MODULE,
201 .get_brightness = read_brightness,
202 .update_status = update_bl_status,
203 .max_brightness = 15,
206 /* These functions actually update the LED's, and are called from a
207 * workqueue. By doing this as separate work rather than when the LED
208 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
209 * potentially bad time, such as a timer interrupt. */
210 static struct workqueue_struct *led_workqueue;
212 #define ASUS_LED(object, ledname) \
213 static void object##_led_set(struct led_classdev *led_cdev, \
214 enum led_brightness value); \
215 static void object##_led_update(struct work_struct *ignored); \
216 static int object##_led_wk; \
217 DECLARE_WORK(object##_led_work, object##_led_update); \
218 static struct led_classdev object##_led = { \
219 .name = "asus:" ledname, \
220 .brightness_set = object##_led_set, \
223 ASUS_LED(mled, "mail");
224 ASUS_LED(tled, "touchpad");
225 ASUS_LED(rled, "record");
226 ASUS_LED(pled, "phone");
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_acpi_int(acpi_handle handle, const char *method, int *val,
252 struct acpi_object_list *params)
254 struct acpi_buffer output;
255 union acpi_object out_obj;
258 output.length = sizeof(out_obj);
259 output.pointer = &out_obj;
261 status = acpi_evaluate_object(handle, (char *)method, params, &output);
262 *val = out_obj.integer.value;
263 return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
266 static int read_wireless_status(int mask) {
269 if (!wireless_status_handle)
270 return (hotk->status & mask) ? 1 : 0;
272 if (read_acpi_int(wireless_status_handle, NULL, &status, NULL)) {
273 return (status & mask) ? 1 : 0;
275 printk(ASUS_WARNING "Error reading Wireless status\n");
277 return (hotk->status & mask) ? 1 : 0;
280 /* Generic LED functions */
281 static int read_status(int mask)
283 /* There is a special method for both wireless devices */
284 if (mask == BT_ON || mask == WL_ON)
285 return read_wireless_status(mask);
287 return (hotk->status & mask) ? 1 : 0;
290 static void write_status(acpi_handle handle, int out, int mask,
293 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
295 if (invert) /* invert target value */
298 if (handle && !write_acpi_int(handle, NULL, out, NULL))
299 printk(ASUS_WARNING " write failed\n");
302 /* /sys/class/led handlers */
303 #define ASUS_LED_HANDLER(object, mask, invert) \
304 static void object##_led_set(struct led_classdev *led_cdev, \
305 enum led_brightness value) \
307 object##_led_wk = value; \
308 queue_work(led_workqueue, &object##_led_work); \
310 static void object##_led_update(struct work_struct *ignored) \
312 int value = object##_led_wk; \
313 write_status(object##_set_handle, value, (mask), (invert)); \
316 ASUS_LED_HANDLER(mled, MLED_ON, 1);
317 ASUS_LED_HANDLER(pled, PLED_ON, 0);
318 ASUS_LED_HANDLER(rled, RLED_ON, 0);
319 ASUS_LED_HANDLER(tled, TLED_ON, 0);
321 static int get_lcd_state(void)
323 return read_status(LCD_ON);
326 static int set_lcd_state(int value)
329 acpi_status status = 0;
333 if (lcd == get_lcd_state())
336 if(lcd_switch_handle) {
337 status = acpi_evaluate_object(lcd_switch_handle,
340 if (ACPI_FAILURE(status))
341 printk(ASUS_WARNING "Error switching LCD\n");
344 write_status(NULL, lcd, LCD_ON, 0);
348 static void lcd_blank(int blank)
350 struct backlight_device *bd = asus_backlight_device;
354 if(likely(bd->props)) {
355 bd->props->power = blank;
356 if(likely(bd->props->update_status))
357 bd->props->update_status(bd);
363 static int read_brightness(struct backlight_device *bd)
367 if (!read_acpi_int(brightness_get_handle, NULL, &value, NULL))
368 printk(ASUS_WARNING "Error reading brightness\n");
373 static int set_brightness(struct backlight_device *bd, int value)
377 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
378 /* 0 <= value <= 15 */
380 if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
381 printk(ASUS_WARNING "Error changing brightness\n");
388 static int update_bl_status(struct backlight_device *bd)
391 int value = bd->props->brightness;
393 rv = set_brightness(bd, value);
397 value = (bd->props->power == FB_BLANK_UNBLANK) ? 1 : 0;
398 return set_lcd_state(value);
402 * Platform device handlers
406 * We write our info in page, we begin at offset off and cannot write more
407 * than count bytes. We set eof to 1 if we handle those 2 values. We return the
408 * number of bytes written in page
410 static ssize_t show_infos(struct device *dev,
411 struct device_attribute *attr, char *page)
415 char buf[16]; //enough for all info
417 * We use the easy way, we don't care of off and count, so we don't set eof
421 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
422 len += sprintf(page + len, "Model reference : %s\n", hotk->name);
424 * The SFUN method probably allows the original driver to get the list
425 * of features supported by a given model. For now, 0x0100 or 0x0800
426 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
427 * The significance of others is yet to be found.
429 if (read_acpi_int(hotk->handle, "SFUN", &temp, NULL))
431 sprintf(page + len, "SFUN value : 0x%04x\n", temp);
433 * Another value for userspace: the ASYM method returns 0x02 for
434 * battery low and 0x04 for battery critical, its readings tend to be
435 * more accurate than those provided by _BST.
436 * Note: since not all the laptops provide this method, errors are
439 if (read_acpi_int(hotk->handle, "ASYM", &temp, NULL))
441 sprintf(page + len, "ASYM value : 0x%04x\n", temp);
443 snprintf(buf, 16, "%d", asus_info->length);
444 len += sprintf(page + len, "DSDT length : %s\n", buf);
445 snprintf(buf, 16, "%d", asus_info->checksum);
446 len += sprintf(page + len, "DSDT checksum : %s\n", buf);
447 snprintf(buf, 16, "%d", asus_info->revision);
448 len += sprintf(page + len, "DSDT revision : %s\n", buf);
449 snprintf(buf, 7, "%s", asus_info->oem_id);
450 len += sprintf(page + len, "OEM id : %s\n", buf);
451 snprintf(buf, 9, "%s", asus_info->oem_table_id);
452 len += sprintf(page + len, "OEM table id : %s\n", buf);
453 snprintf(buf, 16, "%x", asus_info->oem_revision);
454 len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
455 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
456 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
457 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
458 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
464 static int parse_arg(const char *buf, unsigned long count, int *val)
470 if (sscanf(buf, "%i", val) != 1)
475 static ssize_t store_status(const char *buf, size_t count,
476 acpi_handle handle, int mask, int invert)
481 rv = parse_arg(buf, count, &value);
485 write_status(handle, out, mask, invert);
493 static ssize_t show_ledd(struct device *dev,
494 struct device_attribute *attr, char *buf)
496 return sprintf(buf, "0x%08x\n", hotk->ledd_status);
499 static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
500 const char *buf, size_t count)
504 rv = parse_arg(buf, count, &value);
506 if (!write_acpi_int(ledd_set_handle, NULL, value, NULL))
507 printk(ASUS_WARNING "LED display write failed\n");
509 hotk->ledd_status = (u32) value;
517 static ssize_t show_wlan(struct device *dev,
518 struct device_attribute *attr, char *buf)
520 return sprintf(buf, "%d\n", read_status(WL_ON));
523 static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
524 const char *buf, size_t count)
526 return store_status(buf, count, wl_switch_handle, WL_ON, 0);
532 static ssize_t show_bluetooth(struct device *dev,
533 struct device_attribute *attr, char *buf)
535 return sprintf(buf, "%d\n", read_status(BT_ON));
538 static ssize_t store_bluetooth(struct device *dev, struct device_attribute *attr,
539 const char *buf, size_t count)
541 return store_status(buf, count, bt_switch_handle, BT_ON, 0);
547 static void set_display(int value)
549 /* no sanity check needed for now */
550 if (!write_acpi_int(display_set_handle, NULL, value, NULL))
551 printk(ASUS_WARNING "Error setting display\n");
555 static int read_display(void)
559 /* In most of the case, we know how to set the display, but sometime
561 if(display_get_handle) {
562 if (!read_acpi_int(display_get_handle, NULL, &value, NULL))
563 printk(ASUS_WARNING "Error reading display status\n");
566 value &= 0x0F; /* needed for some models, shouldn't hurt others */
571 * Now, *this* one could be more user-friendly, but so far, no-one has
572 * complained. The significance of bits is the same as in store_disp()
574 static ssize_t show_disp(struct device *dev,
575 struct device_attribute *attr, char *buf)
577 return sprintf(buf, "%d\n", read_display());
581 * Experimental support for display switching. As of now: 1 should activate
582 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
583 * Any combination (bitwise) of these will suffice. I never actually tested 4
584 * displays hooked up simultaneously, so be warned. See the acpi4asus README
587 static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
588 const char *buf, size_t count)
592 rv = parse_arg(buf, count, &value);
601 static void set_light_sens_switch(int value)
603 if (!write_acpi_int(ls_switch_handle, NULL, value, NULL))
604 printk(ASUS_WARNING "Error setting light sensor switch\n");
605 hotk->light_switch = value;
608 static ssize_t show_lssw(struct device *dev,
609 struct device_attribute *attr, char *buf)
611 return sprintf(buf, "%d\n", hotk->light_switch);
614 static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
615 const char *buf, size_t count)
619 rv = parse_arg(buf, count, &value);
621 set_light_sens_switch(value ? 1 : 0);
626 static void set_light_sens_level(int value)
628 if (!write_acpi_int(ls_level_handle, NULL, value, NULL))
629 printk(ASUS_WARNING "Error setting light sensor level\n");
630 hotk->light_level = value;
633 static ssize_t show_lslvl(struct device *dev,
634 struct device_attribute *attr, char *buf)
636 return sprintf(buf, "%d\n", hotk->light_level);
639 static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
640 const char *buf, size_t count)
644 rv = parse_arg(buf, count, &value);
646 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
647 /* 0 <= value <= 15 */
648 set_light_sens_level(value);
654 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
656 /* TODO Find a better way to handle events count. */
661 * We need to tell the backlight device when the backlight power is
664 if (event == ATKD_LCD_ON) {
665 write_status(NULL, 1, LCD_ON, 0);
666 lcd_blank(FB_BLANK_UNBLANK);
667 } else if(event == ATKD_LCD_OFF) {
668 write_status(NULL, 0, LCD_ON, 0);
669 lcd_blank(FB_BLANK_POWERDOWN);
672 acpi_bus_generate_event(hotk->device, event,
673 hotk->event_count[event % 128]++);
678 #define ASUS_CREATE_DEVICE_ATTR(_name) \
679 struct device_attribute dev_attr_##_name = { \
681 .name = __stringify(_name), \
683 .owner = THIS_MODULE }, \
688 #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
690 dev_attr_##_name.attr.mode = _mode; \
691 dev_attr_##_name.show = _show; \
692 dev_attr_##_name.store = _store; \
695 static ASUS_CREATE_DEVICE_ATTR(infos);
696 static ASUS_CREATE_DEVICE_ATTR(wlan);
697 static ASUS_CREATE_DEVICE_ATTR(bluetooth);
698 static ASUS_CREATE_DEVICE_ATTR(display);
699 static ASUS_CREATE_DEVICE_ATTR(ledd);
700 static ASUS_CREATE_DEVICE_ATTR(ls_switch);
701 static ASUS_CREATE_DEVICE_ATTR(ls_level);
703 static struct attribute *asuspf_attributes[] = {
704 &dev_attr_infos.attr,
706 &dev_attr_bluetooth.attr,
707 &dev_attr_display.attr,
709 &dev_attr_ls_switch.attr,
710 &dev_attr_ls_level.attr,
714 static struct attribute_group asuspf_attribute_group = {
715 .attrs = asuspf_attributes
718 static struct platform_driver asuspf_driver = {
720 .name = ASUS_HOTK_FILE,
721 .owner = THIS_MODULE,
725 static struct platform_device *asuspf_device;
728 static void asus_hotk_add_fs(void)
730 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
732 if (wl_switch_handle)
733 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
735 if (bt_switch_handle)
736 ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
737 show_bluetooth, store_bluetooth);
739 if (display_set_handle && display_get_handle)
740 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
741 else if(display_set_handle)
742 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
745 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);
747 if (ls_switch_handle && ls_level_handle) {
748 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
749 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
753 static int asus_handle_init(char *name, acpi_handle *handle,
754 char **paths, int num_paths)
759 for (i = 0; i < num_paths; i++) {
760 status = acpi_get_handle(NULL, paths[i], handle);
761 if (ACPI_SUCCESS(status))
769 #define ASUS_HANDLE_INIT(object) \
770 asus_handle_init(#object, &object##_handle, object##_paths, \
771 ARRAY_SIZE(object##_paths))
775 * This function is used to initialize the hotk with right values. In this
776 * method, we can make all the detection we want, and modify the hotk struct
778 static int asus_hotk_get_info(void)
780 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
781 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
782 union acpi_object *model = NULL;
783 int 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_TABLE_ID_DSDT, 1, &dsdt);
796 if (ACPI_FAILURE(status))
797 printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
799 asus_info = dsdt.pointer;
801 /* We have to write 0 on init this far for all ASUS models */
802 if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
803 printk(ASUS_ERR "Hotkey initialization failed\n");
807 /* This needs to be called for some laptops to init properly */
808 if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result, NULL))
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);
846 ASUS_HANDLE_INIT(ledd_set);
849 * The HWRS method return informations about the hardware.
850 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
851 * The significance of others is yet to be found.
852 * If we don't find the method, we assume the device are present.
854 if (!read_acpi_int(hotk->handle, "HRWS", &hwrs_result, NULL))
855 hwrs_result = WL_HWRS | BT_HWRS;
857 if(hwrs_result & WL_HWRS)
858 ASUS_HANDLE_INIT(wl_switch);
859 if(hwrs_result & BT_HWRS)
860 ASUS_HANDLE_INIT(bt_switch);
862 ASUS_HANDLE_INIT(wireless_status);
864 ASUS_HANDLE_INIT(brightness_set);
865 ASUS_HANDLE_INIT(brightness_get);
867 ASUS_HANDLE_INIT(lcd_switch);
869 ASUS_HANDLE_INIT(display_set);
870 ASUS_HANDLE_INIT(display_get);
872 /* There is a lot of models with "ALSL", but a few get
873 a real light sens, so we need to check it. */
874 if(ASUS_HANDLE_INIT(ls_switch))
875 ASUS_HANDLE_INIT(ls_level);
882 static int asus_hotk_check(void)
886 result = acpi_bus_get_status(hotk->device);
890 if (hotk->device->status.present) {
891 result = asus_hotk_get_info();
893 printk(ASUS_ERR "Hotkey device not present, aborting\n");
900 static int asus_hotk_found;
902 static int asus_hotk_add(struct acpi_device *device)
904 acpi_status status = AE_OK;
910 printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
911 ASUS_LAPTOP_VERSION);
913 hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
916 memset(hotk, 0, sizeof(struct asus_hotk));
918 hotk->handle = device->handle;
919 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
920 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
921 acpi_driver_data(device) = hotk;
922 hotk->device = device;
924 result = asus_hotk_check();
931 * We install the handler, it will receive the hotk in parameter, so, we
932 * could add other data to the hotk struct
934 status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
935 asus_hotk_notify, hotk);
936 if (ACPI_FAILURE(status))
937 printk(ASUS_ERR "Error installing notify handler\n");
941 /* WLED and BLED are on by default */
942 write_status(bt_switch_handle, 1, BT_ON, 0);
943 write_status(wl_switch_handle, 1, WL_ON, 0);
945 /* LCD Backlight is on by default */
946 write_status(NULL, 1, LCD_ON, 0);
948 /* LED display is off by default */
949 hotk->ledd_status = 0xFFF;
951 /* Set initial values of light sensor and level */
952 hotk->light_switch = 1; /* Default to light sensor disabled */
953 hotk->light_level = 0; /* level 5 for sensor sensitivity */
955 if (ls_switch_handle)
956 set_light_sens_switch(hotk->light_switch);
959 set_light_sens_level(hotk->light_level);
970 static int asus_hotk_remove(struct acpi_device *device, int type)
972 acpi_status status = 0;
974 if (!device || !acpi_driver_data(device))
977 status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
979 if (ACPI_FAILURE(status))
980 printk(ASUS_ERR "Error removing notify handler\n");
988 static void asus_backlight_exit(void)
990 if(asus_backlight_device)
991 backlight_device_unregister(asus_backlight_device);
994 #define ASUS_LED_UNREGISTER(object) \
995 if(object##_led.class_dev \
996 && !IS_ERR(object##_led.class_dev)) \
997 led_classdev_unregister(&object##_led)
999 static void asus_led_exit(void)
1001 ASUS_LED_UNREGISTER(mled);
1002 ASUS_LED_UNREGISTER(tled);
1003 ASUS_LED_UNREGISTER(pled);
1004 ASUS_LED_UNREGISTER(rled);
1006 destroy_workqueue(led_workqueue);
1009 static void __exit asus_laptop_exit(void)
1011 asus_backlight_exit();
1014 acpi_bus_unregister_driver(&asus_hotk_driver);
1015 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
1016 platform_device_unregister(asuspf_device);
1017 platform_driver_unregister(&asuspf_driver);
1022 static int asus_backlight_init(struct device * dev)
1024 struct backlight_device *bd;
1026 if(brightness_set_handle && lcd_switch_handle) {
1027 bd = backlight_device_register (ASUS_HOTK_FILE, dev,
1028 NULL, &asusbl_data);
1031 "Could not register asus backlight device\n");
1032 asus_backlight_device = NULL;
1036 asus_backlight_device = bd;
1039 if(likely(bd->props)) {
1040 bd->props->brightness = read_brightness(NULL);
1041 bd->props->power = FB_BLANK_UNBLANK;
1042 if(likely(bd->props->update_status))
1043 bd->props->update_status(bd);
1050 static int asus_led_register(acpi_handle handle,
1051 struct led_classdev * ldev,
1052 struct device * dev)
1057 return led_classdev_register(dev, ldev);
1059 #define ASUS_LED_REGISTER(object, device) \
1060 asus_led_register(object##_set_handle, &object##_led, device)
1062 static int asus_led_init(struct device * dev)
1066 rv = ASUS_LED_REGISTER(mled, dev);
1070 rv = ASUS_LED_REGISTER(tled, dev);
1074 rv = ASUS_LED_REGISTER(rled, dev);
1078 rv = ASUS_LED_REGISTER(pled, dev);
1082 led_workqueue = create_singlethread_workqueue("led_workqueue");
1089 static int __init asus_laptop_init(void)
1097 if (!acpi_specific_hotkey_enabled) {
1098 printk(ASUS_ERR "Using generic hotkey driver\n");
1102 result = acpi_bus_register_driver(&asus_hotk_driver);
1107 * This is a bit of a kludge. We only want this module loaded
1108 * for ASUS systems, but there's currently no way to probe the
1109 * ACPI namespace for ASUS HIDs. So we just return failure if
1110 * we didn't find one, which will cause the module to be
1113 if (!asus_hotk_found) {
1114 acpi_bus_unregister_driver(&asus_hotk_driver);
1118 dev = acpi_get_physical_device(hotk->device->handle);
1120 result = asus_backlight_init(dev);
1122 goto fail_backlight;
1124 result = asus_led_init(dev);
1128 /* Register platform stuff */
1129 result = platform_driver_register(&asuspf_driver);
1131 goto fail_platform_driver;
1133 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
1134 if (!asuspf_device) {
1136 goto fail_platform_device1;
1139 result = platform_device_add(asuspf_device);
1141 goto fail_platform_device2;
1143 result = sysfs_create_group(&asuspf_device->dev.kobj,
1144 &asuspf_attribute_group);
1151 platform_device_del(asuspf_device);
1153 fail_platform_device2:
1154 platform_device_put(asuspf_device);
1156 fail_platform_device1:
1157 platform_driver_unregister(&asuspf_driver);
1159 fail_platform_driver:
1163 asus_backlight_exit();
1170 module_init(asus_laptop_init);
1171 module_exit(asus_laptop_exit);