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eeepc-wmi: add camera and card reader support 

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Corentin Chary 2011-02-06 13:28:36 +01:00 committed by Matthew Garrett
parent aafa719dcd
commit 9e1565bc39
2 changed files with 102 additions and 1 deletions
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14
Documentation/ABI/testing/sysfs-platform-eeepc-wmi
View File

@ -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.

89
drivers/platform/x86/eeepc-wmi.c
View File

@ -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)