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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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