本文基于AM6C平台Linux3.0.8内核。

1.drivers/media/video/uvc/Makefile

uvcvideo-objs := uvc_driver.o uvc_queue.o uvc_v4l2.o uvc_video.o uvc_ctrl.o \

uvc_status.o uvc_isight.o

obj-$(CONFIG_USB_VIDEO_CLASS) += uvcvideo.o

2.drivers/media/video/uvc/uvc_driver.c

module_init(uvc_init);

static int __init uvc_init(void){

......

result = usb_register(&uvc_driver.driver);

......

}

struct uvc_driver uvc_driver = {

.driver = {

.name = "uvcvideo",

.probe = uvc_probe,

.disconnect = uvc_disconnect,

.suspend = uvc_suspend,

.resume = uvc_resume,

.reset_resume = uvc_reset_resume,

.id_table = uvc_ids,

.supports_autosuspend = 1,

},

};

static int uvc_probe(struct usb_interface *intf,const struct usb_device_id *id){

......

uvc_register_chains(dev);

......

}

static int uvc_register_chains(struct uvc_device *dev){

......

ret = uvc_register_terms(dev, chain);

......

}

static int uvc_register_terms(struct uvc_device *dev,struct uvc_video_chain *chain){

......

ret = uvc_register_video(dev, stream);

......

}

static int uvc_register_video(struct uvc_device *dev,struct uvc_streaming *stream){

......

vdev = video_device_alloc();

......

vdev->v4l2_dev = &dev->vdev;

vdev->fops = &uvc_fops;

vdev->release = uvc_release;

......

ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);

......

}

3.drivers/media/video/uvc/uvc_v4l2.c

const struct v4l2_file_operations uvc_fops = {

.owner = THIS_MODULE,

.open = uvc_v4l2_open,

.release = uvc_v4l2_release,

.unlocked_ioctl = uvc_v4l2_ioctl,

.read = uvc_v4l2_read,

.mmap = uvc_v4l2_mmap,

.poll = uvc_v4l2_poll,

#ifndef CONFIG_MMU

.get_unmapped_area = uvc_v4l2_get_unmapped_area,

#endif

};

static long uvc_v4l2_ioctl(struct file *file,unsigned int cmd, unsigned long arg){

......

return video_usercopy(file, cmd, arg, uvc_v4l2_do_ioctl);

}

static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg){

......

switch (cmd) {

case VIDIOC_QUERYCAP:......

case VIDIOC_QUERYCTRL:

case VIDIOC_G_CTRL:

case VIDIOC_S_CTRL:

case VIDIOC_QUERYMENU:

case VIDIOC_G_EXT_CTRLS:

case VIDIOC_S_EXT_CTRLS:

case VIDIOC_TRY_EXT_CTRLS:

case VIDIOC_ENUMINPUT:

case VIDIOC_G_INPUT:

case VIDIOC_S_INPUT:

case VIDIOC_ENUM_FMT:

case VIDIOC_TRY_FMT:

case VIDIOC_S_FMT:

case VIDIOC_G_FMT:

case VIDIOC_ENUM_FRAMESIZES:

case VIDIOC_ENUM_FRAMEINTERVALS:

case VIDIOC_G_PARM:

case VIDIOC_S_PARM:

case VIDIOC_CROPCAP:

case VIDIOC_G_CROP:

case VIDIOC_S_CROP:

case VIDIOC_REQBUFS:

case VIDIOC_QUERYBUF:

case VIDIOC_QBUF:

case VIDIOC_DQBUF:

case VIDIOC_STREAMON:

case VIDIOC_STREAMOFF:

case VIDIOC_ENUMSTD:

case VIDIOC_QUERYSTD:

case VIDIOC_G_STD:

case VIDIOC_S_STD:

case VIDIOC_OVERLAY:

case VIDIOC_ENUMAUDIO:

case VIDIOC_ENUMAUDOUT:

case VIDIOC_ENUMOUTPUT:

case __UVCIOC_CTRL_ADD:

case __UVCIOC_CTRL_MAP_OLD:

case __UVCIOC_CTRL_MAP:

case UVCIOC_CTRL_MAP:

case __UVCIOC_CTRL_GET:

case __UVCIOC_CTRL_SET:

case UVCIOC_CTRL_QUERY:

......

}

......

}