uvc驱动记录

最新推荐文章于 2025-04-04 23:39:01 发布

AndroidBBC

最新推荐文章于 2025-04-04 23:39:01 发布

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分类专栏： USB

本文链接：https://blog.youkuaiyun.com/AndroidBBC/article/details/52230472

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本文主要探讨了Linux系统下UVC（USB Video Class）驱动的工作原理，详细解析了ioctl调用流程，涉及uvc_driver.c、uvc_v4l2.c和uvc_ctrl.c等关键文件。

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Linux uvc驱动分析

一、ioctl调用流程

1.common/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 *s