eeepc-wmi: add camera and card reader support (9e1565bc) · Commits · 方亚芬 / linux

Documentation/ABI/testing/sysfs-platform-eeepc-wmi

+14 −0

Original line number	Diff line number	Diff line
		@@ -8,3 +8,17 @@ Description:
		* 0 -> Super Performance Mode
		* 1 -> High Performance Mode
		* 2 -> Power Saving Mode

		What: /sys/devices/platform/eeepc-wmi/camera
		Date: Jan 2010
		KernelVersion: 2.6.39
		Contact: "Corentin Chary" <corentincj@iksaif.net>
		Description:
		Control the camera. 1 means on, 0 means off.

		What: /sys/devices/platform/eeepc-wmi/cardr
		Date: Jan 2010
		KernelVersion: 2.6.39
		Contact: "Corentin Chary" <corentincj@iksaif.net>
		Description:
		Control the card reader. 1 means on, 0 means off.

drivers/platform/x86/eeepc-wmi.c

+88 −1

Original line number	Diff line number	Diff line
		@@ -73,6 +73,8 @@ MODULE_ALIAS("wmi:"EEEPC_WMI_MGMT_GUID);
		#define EEEPC_WMI_DEVID_BLUETOOTH 0x00010013
		#define EEEPC_WMI_DEVID_WWAN3G 0x00010019
		#define EEEPC_WMI_DEVID_BACKLIGHT 0x00050012
		#define EEEPC_WMI_DEVID_CAMERA 0x00060013
		#define EEEPC_WMI_DEVID_CARDREADER 0x00080013
		#define EEEPC_WMI_DEVID_TPDLED 0x00100011

		#define EEEPC_WMI_DSTS_STATUS_BIT 0x00000001
		@@ -879,6 +881,70 @@ static void eeepc_wmi_notify(u32 value, void *context)
		kfree(obj);
		}

		/*
		* Sys helpers
		*/
		static int parse_arg(const char buf, unsigned long count, int val)
		{
		if (!count)
		return 0;
		if (sscanf(buf, "%i", val) != 1)
		return -EINVAL;
		return count;
		}

		static ssize_t store_sys_wmi(int devid, const char *buf, size_t count)
		{
		acpi_status status;
		u32 retval;
		int rv, value;

		value = eeepc_wmi_get_devstate_simple(devid);
		if (value == -ENODEV) /* Check device presence */
		return value;

		rv = parse_arg(buf, count, &value);
		status = eeepc_wmi_set_devstate(devid, value, &retval);

		if (ACPI_FAILURE(status))
		return -EIO;
		return rv;
		}

		static ssize_t show_sys_wmi(int devid, char *buf)
		{
		int value = eeepc_wmi_get_devstate_simple(devid);

		if (value < 0)
		return value;

		return sprintf(buf, "%d\n", value);
		}

		#define EEEPC_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
		static ssize_t show_##_name(struct device *dev, \
		struct device_attribute *attr, \
		char *buf) \
		{ \
		return show_sys_wmi(_cm, buf); \
		} \
		static ssize_t store_##_name(struct device *dev, \
		struct device_attribute *attr, \
		const char *buf, size_t count) \
		{ \
		return store_sys_wmi(_cm, buf, count); \
		} \
		static struct device_attribute dev_attr_##_name = { \
		.attr = { \
		.name = __stringify(_name), \
		.mode = _mode }, \
		.show = show_##_name, \
		.store = store_##_name, \
		}

		EEEPC_WMI_CREATE_DEVICE_ATTR(camera, 0644, EEEPC_WMI_DEVID_CAMERA);
		EEEPC_WMI_CREATE_DEVICE_ATTR(cardr, 0644, EEEPC_WMI_DEVID_CARDREADER);

		static ssize_t store_cpufv(struct device dev, struct device_attribute attr,
		const char *buf, size_t count)
		{
		@@ -904,10 +970,31 @@ static DEVICE_ATTR(cpufv, S_IRUGO \| S_IWUSR, NULL, store_cpufv);

		static struct attribute *platform_attributes[] = {
		&dev_attr_cpufv.attr,
		&dev_attr_camera.attr,
		&dev_attr_cardr.attr,
		NULL
		};

		static mode_t eeepc_sysfs_is_visible(struct kobject *kobj,
		struct attribute *attr,
		int idx)
		{
		bool supported = true;
		int devid = -1;

		if (attr == &dev_attr_camera.attr)
		devid = EEEPC_WMI_DEVID_CAMERA;
		else if (attr == &dev_attr_cardr.attr)
		devid = EEEPC_WMI_DEVID_CARDREADER;

		if (devid != -1)
		supported = eeepc_wmi_get_devstate_simple(devid) != -ENODEV;

		return supported ? attr->mode : 0;
		}

		static struct attribute_group platform_attribute_group = {
		.is_visible = eeepc_sysfs_is_visible,
		.attrs = platform_attributes
		};