diff options
Diffstat (limited to 'drivers/media/media-device.c')
| -rw-r--r-- | drivers/media/media-device.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c index d2bc809d7a2a..92e0d4eb84b8 100644 --- a/drivers/media/media-device.c +++ b/drivers/media/media-device.c @@ -22,13 +22,70 @@ #include <linux/types.h> #include <linux/ioctl.h> +#include <linux/media.h> #include <media/media-device.h> #include <media/media-devnode.h> #include <media/media-entity.h> +/* ----------------------------------------------------------------------------- + * Userspace API + */ + +static int media_device_open(struct file *filp) +{ + return 0; +} + +static int media_device_close(struct file *filp) +{ + return 0; +} + +static int media_device_get_info(struct media_device *dev, + struct media_device_info __user *__info) +{ + struct media_device_info info; + + memset(&info, 0, sizeof(info)); + + strlcpy(info.driver, dev->dev->driver->name, sizeof(info.driver)); + strlcpy(info.model, dev->model, sizeof(info.model)); + strlcpy(info.serial, dev->serial, sizeof(info.serial)); + strlcpy(info.bus_info, dev->bus_info, sizeof(info.bus_info)); + + info.media_version = MEDIA_API_VERSION; + info.hw_revision = dev->hw_revision; + info.driver_version = dev->driver_version; + + return copy_to_user(__info, &info, sizeof(*__info)); +} + +static long media_device_ioctl(struct file *filp, unsigned int cmd, + unsigned long arg) +{ + struct media_devnode *devnode = media_devnode_data(filp); + struct media_device *dev = to_media_device(devnode); + long ret; + + switch (cmd) { + case MEDIA_IOC_DEVICE_INFO: + ret = media_device_get_info(dev, + (struct media_device_info __user *)arg); + break; + + default: + ret = -ENOIOCTLCMD; + } + + return ret; +} + static const struct media_file_operations media_device_fops = { .owner = THIS_MODULE, + .open = media_device_open, + .ioctl = media_device_ioctl, + .release = media_device_close, }; /* ----------------------------------------------------------------------------- |