asus-laptop.c

linux 内核源代码

		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))