/* * asus-laptop.c - Asus Laptop Support * * * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor * Copyright (C) 2006-2007 Corentin Chary * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * * The development page for this driver is located at * http://sourceforge.net/projects/acpi4asus/ * * Credits: * Pontus Fuchs - Helper functions, cleanup * Johann Wiesner - Small compile fixes * John Belmonte - ACPI code for Toshiba laptop was a good starting point. * Eric Burghard - LED display support for W1N * Josh Green - Light Sens support * Thomas Tuttle - His first patch for led support was very helpfull * Sam Lin - GPS support */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define ASUS_LAPTOP_VERSION "0.42" #define ASUS_HOTK_NAME "Asus Laptop Support" #define ASUS_HOTK_CLASS "hotkey" #define ASUS_HOTK_DEVICE_NAME "Hotkey" #define ASUS_HOTK_FILE "asus-laptop" #define ASUS_HOTK_PREFIX "\\_SB.ATKD." /* * Some events we use, same for all Asus */ #define ATKD_BR_UP 0x10 #define ATKD_BR_DOWN 0x20 #define ATKD_LCD_ON 0x33 #define ATKD_LCD_OFF 0x34 /* * Known bits returned by \_SB.ATKD.HWRS */ #define WL_HWRS 0x80 #define BT_HWRS 0x100 /* * Flags for hotk status * WL_ON and BT_ON are also used for wireless_status() */ #define WL_ON 0x01 //internal Wifi #define BT_ON 0x02 //internal Bluetooth #define MLED_ON 0x04 //mail LED #define TLED_ON 0x08 //touchpad LED #define RLED_ON 0x10 //Record LED #define PLED_ON 0x20 //Phone LED #define GLED_ON 0x40 //Gaming LED #define LCD_ON 0x80 //LCD backlight #define GPS_ON 0x100 //GPS #define ASUS_LOG ASUS_HOTK_FILE ": " #define ASUS_ERR KERN_ERR ASUS_LOG #define ASUS_WARNING KERN_WARNING ASUS_LOG #define ASUS_NOTICE KERN_NOTICE ASUS_LOG #define ASUS_INFO KERN_INFO ASUS_LOG #define ASUS_DEBUG KERN_DEBUG ASUS_LOG MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary"); MODULE_DESCRIPTION(ASUS_HOTK_NAME); MODULE_LICENSE("GPL"); /* WAPF defines the behavior of the Fn+Fx wlan key * The significance of values is yet to be found, but * most of the time: * 0x0 will do nothing * 0x1 will allow to control the device with Fn+Fx key. * 0x4 will send an ACPI event (0x88) while pressing the Fn+Fx key * 0x5 like 0x1 or 0x4 * So, if something doesn't work as you want, just try other values =) */ static uint wapf = 1; module_param(wapf, uint, 0644); MODULE_PARM_DESC(wapf, "WAPF value"); #define ASUS_HANDLE(object, paths...) \ static acpi_handle object##_handle = NULL; \ static char *object##_paths[] = { paths } /* LED */ ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED"); ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED"); ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */ ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */ ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */ /* LEDD */ ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM"); /* Bluetooth and WLAN * WLED and BLED are not handled like other XLED, because in some dsdt * they also control the WLAN/Bluetooth device. */ ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED"); ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED"); ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */ /* Brightness */ ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV"); ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV"); /* Backlight */ ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */ "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */ "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */ "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */ "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */ "\\_SB.PCI0.PX40.Q10", /* S1x */ "\\Q10"); /* A2x, L2D, L3D, M2E */ /* Display */ ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP"); ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G M6A M6V VX-1 V6J V6V W3Z */ "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V S5A M5A z33A W1Jc W2V G1 */ "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */ "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */ "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */ "\\_SB.PCI0.VGA.GETD", /* Z96F */ "\\ACTD", /* A2D */ "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */ "\\DNXT", /* P30 */ "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */ "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */ ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */ ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */ /* GPS */ /* R2H use different handle for GPS on/off */ ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON"); /* R2H */ ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF"); /* R2H */ ASUS_HANDLE(gps_status, ASUS_HOTK_PREFIX "GPST"); /* * This is the main structure, we can use it to store anything interesting * about the hotk device */ struct asus_hotk { char *name; //laptop name struct acpi_device *device; //the device we are in acpi_handle handle; //the handle of the hotk device char status; //status of the hotk, for LEDs, ... u32 ledd_status; //status of the LED display u8 light_level; //light sensor level u8 light_switch; //light sensor switch value u16 event_count[128]; //count for each event TODO make this better }; /* * This header is made available to allow proper configuration given model, * revision number , ... this info cannot go in struct asus_hotk because it is * available before the hotk */ static struct acpi_table_header *asus_info; /* The actual device the driver binds to */ static struct asus_hotk *hotk; /* * The hotkey driver declaration */ static const struct acpi_device_id asus_device_ids[] = { {"ATK0100", 0}, {"", 0}, }; MODULE_DEVICE_TABLE(acpi, asus_device_ids); static int asus_hotk_add(struct acpi_device *device); static int asus_hotk_remove(struct acpi_device *device, int type); static struct acpi_driver asus_hotk_driver = { .name = ASUS_HOTK_NAME, .class = ASUS_HOTK_CLASS, .ids = asus_device_ids, .ops = { .add = asus_hotk_add, .remove = asus_hotk_remove, }, }; /* The backlight device /sys/class/backlight */ static struct backlight_device *asus_backlight_device; /* * The backlight class declaration */ static int read_brightness(struct backlight_device *bd); static int update_bl_status(struct backlight_device *bd); static struct backlight_ops asusbl_ops = { .get_brightness = read_brightness, .update_status = update_bl_status, }; /* These functions actually update the LED's, and are called from a * workqueue. By doing this as separate work rather than when the LED * subsystem asks, we avoid messing with the Asus ACPI stuff during a * potentially bad time, such as a timer interrupt. */ static struct workqueue_struct *led_workqueue; #define ASUS_LED(object, ledname) \ static void object##_led_set(struct led_classdev *led_cdev, \ enum led_brightness value); \ static void object##_led_update(struct work_struct *ignored); \ static int object##_led_wk; \ static DECLARE_WORK(object##_led_work, object##_led_update); \ static struct led_classdev object##_led = { \ .name = "asus:" ledname, \ .brightness_set = object##_led_set, \ } ASUS_LED(mled, "mail"); ASUS_LED(tled, "touchpad"); ASUS_LED(rled, "record"); ASUS_LED(pled, "phone"); ASUS_LED(gled, "gaming"); /* * This function evaluates an ACPI method, given an int as parameter, the * method is searched within the scope of the handle, can be NULL. The output * of the method is written is output, which can also be NULL * * returns 1 if write is successful, 0 else. */ static int write_acpi_int(acpi_handle handle, const char *method, int val, struct acpi_buffer *output) { struct acpi_object_list params; //list of input parameters (an int here) union acpi_object in_obj; //the only param we use acpi_status status; params.count = 1; params.pointer = &in_obj; in_obj.type = ACPI_TYPE_INTEGER; in_obj.integer.value = val; status = acpi_evaluate_object(handle, (char *)method, ¶ms, output); return (status == AE_OK); } static int read_wireless_status(int mask) { ulong status; acpi_status rv = AE_OK; if (!wireless_status_handle) return (hotk->status & mask) ? 1 : 0; rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status); if (ACPI_FAILURE(rv)) printk(ASUS_WARNING "Error reading Wireless status\n"); else return (status & mask) ? 1 : 0; return (hotk->status & mask) ? 1 : 0; } static int read_gps_status(void) { ulong status; acpi_status rv = AE_OK; rv = acpi_evaluate_integer(gps_status_handle, NULL, NULL, &status); if (ACPI_FAILURE(rv)) printk(ASUS_WARNING "Error reading GPS status\n"); else return status ? 1 : 0; return (hotk->status & GPS_ON) ? 1 : 0; } /* Generic LED functions */ static int read_status(int mask) { /* There is a special method for both wireless devices */ if (mask == BT_ON || mask == WL_ON) return read_wireless_status(mask); else if (mask == GPS_ON) return read_gps_status(); return (hotk->status & mask) ? 1 : 0; } static void write_status(acpi_handle handle, int out, int mask) { hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask); switch (mask) { case MLED_ON: out = !out & 0x1; break; case GLED_ON: out = (out & 0x1) + 1; break; case GPS_ON: handle = (out) ? gps_on_handle : gps_off_handle; out = 0x02; break; default: out &= 0x1; break; } if (handle && !write_acpi_int(handle, NULL, out, NULL)) printk(ASUS_WARNING " write failed %x\n", mask); } /* /sys/class/led handlers */ #define ASUS_LED_HANDLER(object, mask) \ static void object##_led_set(struct led_classdev *led_cdev, \ enum led_brightness value) \ { \ object##_led_wk = value; \ queue_work(led_workqueue, &object##_led_work); \ } \ static void object##_led_update(struct work_struct *ignored) \ { \ int value = object##_led_wk; \ write_status(object##_set_handle, value, (mask)); \ } ASUS_LED_HANDLER(mled, MLED_ON); ASUS_LED_HANDLER(pled, PLED_ON); ASUS_LED_HANDLER(rled, RLED_ON); ASUS_LED_HANDLER(tled, TLED_ON); ASUS_LED_HANDLER(gled, GLED_ON); static int get_lcd_state(void) { return read_status(LCD_ON); } static int set_lcd_state(int value) { int lcd = 0; acpi_status status = 0; lcd = value ? 1 : 0; if (lcd == get_lcd_state()) return 0; if (lcd_switch_handle) { status = acpi_evaluate_object(lcd_switch_handle, NULL, NULL, NULL); if (ACPI_FAILURE(status)) printk(ASUS_WARNING "Error switching LCD\n"); } write_status(NULL, lcd, LCD_ON); return 0; } static void lcd_blank(int blank) { struct backlight_device *bd = asus_backlight_device; if (bd) { bd->props.power = blank; backlight_update_status(bd); } } static int read_brightness(struct backlight_device *bd) { ulong value; acpi_status rv = AE_OK; rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value); if (ACPI_FAILURE(rv)) printk(ASUS_WARNING "Error reading brightness\n"); return value; } static int set_brightness(struct backlight_device *bd, int value) { int ret = 0; value = (0 < value) ? ((15 < value) ? 15 : value) : 0; /* 0 <= value <= 15 */ if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) { printk(ASUS_WARNING "Error changing brightness\n"); ret = -EIO; } return ret; } static int update_bl_status(struct backlight_device *bd) { int rv; int value = bd->props.brightness; rv = set_brightness(bd, value); if (rv) return rv; value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0; return set_lcd_state(value); } /* * Platform device handlers */ /* * We write our info in page, we begin at offset off and cannot write more * than count bytes. We set eof to 1 if we handle those 2 values. We return the * number of bytes written in page */ static ssize_t show_infos(struct device *dev, struct device_attribute *attr, char *page) { int len = 0; ulong temp; char buf[16]; //enough for all info acpi_status rv = AE_OK; /* * We use the easy way, we don't care of off and count, so we don't set eof * to 1 */ len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n"); len += sprintf(page + len, "Model reference : %s\n", hotk->name); /* * The SFUN method probably allows the original driver to get the list * of features supported by a given model. For now, 0x0100 or 0x0800 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. * The significance of others is yet to be found. */ rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp); if (!ACPI_FAILURE(rv)) len += sprintf(page + len, "SFUN value : 0x%04x\n", (uint) temp); /* * Another value for userspace: the ASYM method returns 0x02 for * battery low and 0x04 for battery critical, its readings tend to be * more accurate than those provided by _BST. * Note: since not all the laptops provide this method, errors are * silently ignored. */ rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp); if (!ACPI_FAILURE(rv)) len += sprintf(page + len, "ASYM value : 0x%04x\n", (uint) temp); if (asus_info) { snprintf(buf, 16, "%d", asus_info->length); len += sprintf(page + len, "DSDT length : %s\n", buf); snprintf(buf, 16, "%d", asus_info->checksum); len += sprintf(page + len, "DSDT checksum : %s\n", buf); snprintf(buf, 16, "%d", asus_info->revision); len += sprintf(page + len, "DSDT revision : %s\n", buf); snprintf(buf, 7, "%s", asus_info->oem_id); len += sprintf(page + len, "OEM id : %s\n", buf); snprintf(buf, 9, "%s", asus_info->oem_table_id); len += sprintf(page + len, "OEM table id : %s\n", buf); snprintf(buf, 16, "%x", asus_info->oem_revision); len += sprintf(page + len, "OEM revision : 0x%s\n", buf); snprintf(buf, 5, "%s", asus_info->asl_compiler_id); len += sprintf(page + len, "ASL comp vendor id : %s\n", buf); snprintf(buf, 16, "%x", asus_info->asl_compiler_revision); len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf); } return len; } static int parse_arg(const char *buf, unsigned long count, int *val) { if (!count) return 0; if (count > 31) return -EINVAL; if (sscanf(buf, "%i", val) != 1) return -EINVAL; return count; } static ssize_t store_status(const char *buf, size_t count, acpi_handle handle, int mask) { int rv, value; int out = 0; rv = parse_arg(buf, count, &value); if (rv > 0) out = value ? 1 : 0; write_status(handle, out, mask); return rv; } /* * LEDD display */ static ssize_t show_ledd(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "0x%08x\n", hotk->ledd_status); } static ssize_t store_ledd(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int rv, value; rv = parse_arg(buf, count, &value); if (rv > 0) { if (!write_acpi_int(ledd_set_handle, NULL, value, NULL)) printk(ASUS_WARNING "LED display write failed\n"); else hotk->ledd_status = (u32) value; } return rv; } /* * WLAN */ static ssize_t show_wlan(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", read_status(WL_ON)); } static ssize_t store_wlan(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return store_status(buf, count, wl_switch_handle, WL_ON); } /* * Bluetooth */ static ssize_t show_bluetooth(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", read_status(BT_ON)); } static ssize_t store_bluetooth(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return store_status(buf, count, bt_switch_handle, BT_ON); } /* * Display */ static void set_display(int value) { /* no sanity check needed for now */ if (!write_acpi_int(display_set_handle, NULL, value, NULL)) printk(ASUS_WARNING "Error setting display\n"); return; } static int read_display(void) { ulong value = 0; acpi_status rv = AE_OK; /* In most of the case, we know how to set the display, but sometime we can't read it */ if (display_get_handle) { rv = acpi_evaluate_integer(display_get_handle, NULL, NULL, &value); if (ACPI_FAILURE(rv)) printk(ASUS_WARNING "Error reading display status\n"); } value &= 0x0F; /* needed for some models, shouldn't hurt others */ return value; } /* * Now, *this* one could be more user-friendly, but so far, no-one has * complained. The significance of bits is the same as in store_disp() */ static ssize_t show_disp(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", read_display()); } /* * Experimental support for display switching. As of now: 1 should activate * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI. * Any combination (bitwise) of these will suffice. I never actually tested 4 * displays hooked up simultaneously, so be warned. See the acpi4asus README * for more info. */ static ssize_t store_disp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int rv, value; rv = parse_arg(buf, count, &value); if (rv > 0) set_display(value); return rv; } /* * Light Sens */ static void set_light_sens_switch(int value) { if (!write_acpi_int(ls_switch_handle, NULL, value, NULL)) printk(ASUS_WARNING "Error setting light sensor switch\n"); hotk->light_switch = value; } static ssize_t show_lssw(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", hotk->light_switch); } static ssize_t store_lssw(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int rv, value; rv = parse_arg(buf, count, &value); if (rv > 0) set_light_sens_switch(value ? 1 : 0); return rv; } static void set_light_sens_level(int value) { if (!write_acpi_int(ls_level_handle, NULL, value, NULL)) printk(ASUS_WARNING "Error setting light sensor level\n"); hotk->light_level = value; } static ssize_t show_lslvl(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", hotk->light_level); } static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int rv, value; rv = parse_arg(buf, count, &value); if (rv > 0) { value = (0 < value) ? ((15 < value) ? 15 : value) : 0; /* 0 <= value <= 15 */ set_light_sens_level(value); } return rv; } /* * GPS */ static ssize_t show_gps(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", read_status(GPS_ON)); } static ssize_t store_gps(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return store_status(buf, count, NULL, GPS_ON); } static void asus_hotk_notify(acpi_handle handle, u32 event, void *data) { /* TODO Find a better way to handle events count. */ if (!hotk) return; /* * We need to tell the backlight device when the backlight power is * switched */ if (event == ATKD_LCD_ON) { write_status(NULL, 1, LCD_ON); lcd_blank(FB_BLANK_UNBLANK); } else if (event == ATKD_LCD_OFF) { write_status(NULL, 0, LCD_ON); lcd_blank(FB_BLANK_POWERDOWN); } acpi_bus_generate_proc_event(hotk->device, event, hotk->event_count[event % 128]++); return; } #define ASUS_CREATE_DEVICE_ATTR(_name) \ struct device_attribute dev_attr_##_name = { \ .attr = { \ .name = __stringify(_name), \ .mode = 0 }, \ .show = NULL, \ .store = NULL, \ } #define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \ do { \ dev_attr_##_name.attr.mode = _mode; \ dev_attr_##_name.show = _show; \ dev_attr_##_name.store = _store; \ } while(0) static ASUS_CREATE_DEVICE_ATTR(infos); static ASUS_CREATE_DEVICE_ATTR(wlan); static ASUS_CREATE_DEVICE_ATTR(bluetooth); static ASUS_CREATE_DEVICE_ATTR(display); static ASUS_CREATE_DEVICE_ATTR(ledd); static ASUS_CREATE_DEVICE_ATTR(ls_switch); static ASUS_CREATE_DEVICE_ATTR(ls_level); static ASUS_CREATE_DEVICE_ATTR(gps); static struct attribute *asuspf_attributes[] = { &dev_attr_infos.attr, &dev_attr_wlan.attr, &dev_attr_bluetooth.attr, &dev_attr_display.attr, &dev_attr_ledd.attr, &dev_attr_ls_switch.attr, &dev_attr_ls_level.attr, &dev_attr_gps.attr, NULL }; static struct attribute_group asuspf_attribute_group = { .attrs = asuspf_attributes }; static struct platform_driver asuspf_driver = { .driver = { .name = ASUS_HOTK_FILE, .owner = THIS_MODULE, } }; static struct platform_device *asuspf_device; static void asus_hotk_add_fs(void) { ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL); if (wl_switch_handle) ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan); if (bt_switch_handle) ASUS_SET_DEVICE_ATTR(bluetooth, 0644, show_bluetooth, store_bluetooth); if (display_set_handle && display_get_handle) ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp); else if (display_set_handle) ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp); if (ledd_set_handle) ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd); if (ls_switch_handle && ls_level_handle) { ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl); ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw); } if (gps_status_handle && gps_on_handle && gps_off_handle) ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps); } static int asus_handle_init(char *name, acpi_handle * handle, char **paths, int num_paths) { int i; acpi_status status; for (i = 0; i < num_paths; i++) { status = acpi_get_handle(NULL, paths[i], handle); if (ACPI_SUCCESS(status)) return 0; } *handle = NULL; return -ENODEV; } #define ASUS_HANDLE_INIT(object) \ asus_handle_init(#object, &object##_handle, object##_paths, \ ARRAY_SIZE(object##_paths)) /* * This function is used to initialize the hotk with right values. In this * method, we can make all the detection we want, and modify the hotk struct */ static int asus_hotk_get_info(void) { struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *model = NULL; ulong bsts_result, hwrs_result; char *string = NULL; acpi_status status; /* * Get DSDT headers early enough to allow for differentiating between * models, but late enough to allow acpi_bus_register_driver() to fail * before doing anything ACPI-specific. Should we encounter a machine, * which needs special handling (i.e. its hotkey device has a different * HID), this bit will be moved. A global variable asus_info contains * the DSDT header. */ status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info); if (ACPI_FAILURE(status)) printk(ASUS_WARNING "Couldn't get the DSDT table header\n"); /* We have to write 0 on init this far for all ASUS models */ if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) { printk(ASUS_ERR "Hotkey initialization failed\n"); return -ENODEV; } /* This needs to be called for some laptops to init properly */ status = acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result); if (ACPI_FAILURE(status)) printk(ASUS_WARNING "Error calling BSTS\n"); else if (bsts_result) printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n", (uint) bsts_result); /* This too ... */ write_acpi_int(hotk->handle, "CWAP", wapf, NULL); /* * Try to match the object returned by INIT to the specific model. * Handle every possible object (or the lack of thereof) the DSDT * writers might throw at us. When in trouble, we pass NULL to * asus_model_match() and try something completely different. */ if (buffer.pointer) { model = buffer.pointer; switch (model->type) { case ACPI_TYPE_STRING: string = model->string.pointer; break; case ACPI_TYPE_BUFFER: string = model->buffer.pointer; break; default: string = ""; break; } } hotk->name = kstrdup(string, GFP_KERNEL); if (!hotk->name) return -ENOMEM; if (*string) printk(ASUS_NOTICE " %s model detected\n", string); ASUS_HANDLE_INIT(mled_set); ASUS_HANDLE_INIT(tled_set); ASUS_HANDLE_INIT(rled_set); ASUS_HANDLE_INIT(pled_set); ASUS_HANDLE_INIT(gled_set); ASUS_HANDLE_INIT(ledd_set); /* * The HWRS method return informations about the hardware. * 0x80 bit is for WLAN, 0x100 for Bluetooth. * The significance of others is yet to be found. * If we don't find the method, we assume the device are present. */ status = acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result); if (ACPI_FAILURE(status)) hwrs_result = WL_HWRS | BT_HWRS; if (hwrs_result & WL_HWRS) ASUS_HANDLE_INIT(wl_switch); if (hwrs_result & BT_HWRS) ASUS_HANDLE_INIT(bt_switch); ASUS_HANDLE_INIT(wireless_status); ASUS_HANDLE_INIT(brightness_set); ASUS_HANDLE_INIT(brightness_get); ASUS_HANDLE_INIT(lcd_switch); ASUS_HANDLE_INIT(display_set); ASUS_HANDLE_INIT(display_get); /* There is a lot of models with "ALSL", but a few get a real light sens, so we need to check it. */ if (!ASUS_HANDLE_INIT(ls_switch)) ASUS_HANDLE_INIT(ls_level); ASUS_HANDLE_INIT(gps_on); ASUS_HANDLE_INIT(gps_off); ASUS_HANDLE_INIT(gps_status); kfree(model); return AE_OK; } static int asus_hotk_check(void) { int result = 0; result = acpi_bus_get_status(hotk->device); if (result) return result; if (hotk->device->status.present) { result = asus_hotk_get_info(); } else { printk(ASUS_ERR "Hotkey device not present, aborting\n"); return -EINVAL; } return result; } static int asus_hotk_found; static int asus_hotk_add(struct acpi_device *device) { acpi_status status = AE_OK; int result; if (!device) return -EINVAL; printk(ASUS_NOTICE "Asus Laptop Support version %s\n", ASUS_LAPTOP_VERSION); hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL); if (!hotk) return -ENOMEM; hotk->handle = device->handle; strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME); strcpy(acpi_device_class(device), ASUS_HOTK_CLASS); acpi_driver_data(device) = hotk; hotk->device = device; result = asus_hotk_check(); if (result) goto end; asus_hotk_add_fs(); /* * We install the handler, it will receive the hotk in parameter, so, we * could add other data to the hotk struct */ status = acpi_install_notify_handler(hotk->handle, ACPI_ALL_NOTIFY, asus_hotk_notify, hotk); if (ACPI_FAILURE(status)) printk(ASUS_ERR "Error installing notify handler\n"); asus_hotk_found = 1; /* WLED and BLED are on by default */ write_status(bt_switch_handle, 1, BT_ON); write_status(wl_switch_handle, 1, WL_ON); /* If the h/w switch is off, we need to check the real status */ write_status(NULL, read_status(BT_ON), BT_ON); write_status(NULL, read_status(WL_ON), WL_ON); /* LCD Backlight is on by default */ write_status(NULL, 1, LCD_ON); /* LED display is off by default */ hotk->ledd_status = 0xFFF; /* Set initial values of light sensor and level */ hotk->light_switch = 1; /* Default to light sensor disabled */ hotk->light_level = 0; /* level 5 for sensor sensitivity */ if (ls_switch_handle) set_light_sens_switch(hotk->light_switch); if (ls_level_handle) set_light_sens_level(hotk->light_level); /* GPS is on by default */ write_status(NULL, 1, GPS_ON); end: if (result) { kfree(hotk->name); kfree(hotk); } return result; } static int asus_hotk_remove(struct acpi_device *device, int type) { acpi_status status = 0; if (!device || !acpi_driver_data(device)) return -EINVAL; status = acpi_remove_notify_handler(hotk->handle, ACPI_ALL_NOTIFY, asus_hotk_notify); if (ACPI_FAILURE(status)) printk(ASUS_ERR "Error removing notify handler\n"); kfree(hotk->name); kfree(hotk); return 0; } static void asus_backlight_exit(void) { if (asus_backlight_device) backlight_device_unregister(asus_backlight_device); } #define ASUS_LED_UNREGISTER(object) \ led_classdev_unregister(&object##_led) static void asus_led_exit(void) { destroy_workqueue(led_workqueue); ASUS_LED_UNREGISTER(mled); ASUS_LED_UNREGISTER(tled); ASUS_LED_UNREGISTER(pled); ASUS_LED_UNREGISTER(rled); ASUS_LED_UNREGISTER(gled); } static void __exit asus_laptop_exit(void) { asus_backlight_exit(); asus_led_exit(); acpi_bus_unregister_driver(&asus_hotk_driver); sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group); platform_device_unregister(asuspf_device); platform_driver_unregister(&asuspf_driver); } static int asus_backlight_init(struct device *dev) { struct backlight_device *bd; if (brightness_set_handle && lcd_switch_handle) { bd = backlight_device_register(ASUS_HOTK_FILE, dev, NULL, &asusbl_ops); if (IS_ERR(bd)) { printk(ASUS_ERR "Could not register asus backlight device\n"); asus_backlight_device = NULL; return PTR_ERR(bd); } asus_backlight_device = bd; bd->props.max_brightness = 15; bd->props.brightness = read_brightness(NULL); bd->props.power = FB_BLANK_UNBLANK; backlight_update_status(bd); } return 0; } static int asus_led_register(acpi_handle handle, struct led_classdev *ldev, struct device *dev) { if (!handle) return 0; return led_classdev_register(dev, ldev); } #define ASUS_LED_REGISTER(object, device) \ asus_led_register(object##_set_handle, &object##_led, device) static int asus_led_init(struct device *dev) { int rv; rv = ASUS_LED_REGISTER(mled, dev); if (rv) goto out; rv = ASUS_LED_REGISTER(tled, dev); if (rv) goto out1; rv = ASUS_LED_REGISTER(rled, dev); if (rv) goto out2; rv = ASUS_LED_REGISTER(pled, dev); if (rv) goto out3; rv = ASUS_LED_REGISTER(gled, dev); if (rv) goto out4; led_workqueue = create_singlethread_workqueue("led_workqueue"); if (!led_workqueue) goto out5; return 0; out5: rv = -ENOMEM; ASUS_LED_UNREGISTER(gled); out4: ASUS_LED_UNREGISTER(pled); out3: ASUS_LED_UNREGISTER(rled); out2: ASUS_LED_UNREGISTER(tled); out1: ASUS_LED_UNREGISTER(mled); out: return rv; } static int __init asus_laptop_init(void) { struct device *dev; int result; if (acpi_disabled) return -ENODEV; result = acpi_bus_register_driver(&asus_hotk_driver); if (result < 0) return result; /* * This is a bit of a kludge. We only want this module loaded * for ASUS systems, but there's currently no way to probe the * ACPI namespace for ASUS HIDs. So we just return failure if * we didn't find one, which will cause the module to be * unloaded. */ if (!asus_hotk_found) { acpi_bus_unregister_driver(&asus_hotk_driver); return -ENODEV; } dev = acpi_get_physical_device(hotk->device->handle); result = asus_backlight_init(dev); if (result) goto fail_backlight; result = asus_led_init(dev); if (result) goto fail_led; /* Register platform stuff */ result = platform_driver_register(&asuspf_driver); if (result) goto fail_platform_driver; asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1); if (!asuspf_device) { result = -ENOMEM; goto fail_platform_device1; } result = platform_device_add(asuspf_device); if (result) goto fail_platform_device2; result = sysfs_create_group(&asuspf_device->dev.kobj, &asuspf_attribute_group); if (result) goto fail_sysfs; return 0; fail_sysfs: platform_device_del(asuspf_device); fail_platform_device2: platform_device_put(asuspf_device); fail_platform_device1: platform_driver_unregister(&asuspf_driver); fail_platform_driver: asus_led_exit(); fail_led: asus_backlight_exit(); fail_backlight: return result; } module_init(asus_laptop_init); module_exit(asus_laptop_exit);