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Subject[PATCH v2 11/18] eeepc-wmi: add camera and card reader support
Date
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
---
Documentation/ABI/testing/sysfs-platform-eeepc-wmi | 14 +++
drivers/platform/x86/eeepc-wmi.c | 89 +++++++++++++++++++-
2 files changed, 102 insertions(+), 1 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-platform-eeepc-wmi b/Documentation/ABI/testing/sysfs-platform-eeepc-wmi
index e4b5fef..9fc8d33 100644
--- a/Documentation/ABI/testing/sysfs-platform-eeepc-wmi
+++ b/Documentation/ABI/testing/sysfs-platform-eeepc-wmi
@@ -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.
diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c
index 391c32b..83415dd 100644
--- a/drivers/platform/x86/eeepc-wmi.c
+++ b/drivers/platform/x86/eeepc-wmi.c
@@ -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)
{
@@ -904,11 +970,32 @@ 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 = {
- .attrs = platform_attributes
+ .is_visible = eeepc_sysfs_is_visible,
+ .attrs = platform_attributes
};

static void eeepc_wmi_sysfs_exit(struct platform_device *device)
--
1.7.4.rc3


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