media/mc/mc-devnode.c

34 #include <media/media-devnode.h>
51 	struct media_devnode *devnode = to_media_devnode(cd);
55 	clear_bit(devnode->minor, media_devnode_nums);
59 	if (devnode->release)
60 		devnode->release(devnode);
62 	kfree(devnode);
73 	struct media_devnode *devnode = media_devnode_data(filp);
75 	if (!devnode->fops->read)
77 	if (!media_devnode_is_registered(devnode))
79 	return devnode->fops->read(filp, buf, sz, off);
85 	struct media_devnode *devnode = media_devnode_data(filp);
87 	if (!devnode->fops->write)
89 	if (!media_devnode_is_registered(devnode))
91 	return devnode->fops->write(filp, buf, sz, off);
97 	struct media_devnode *devnode = media_devnode_data(filp);
99 	if (!media_devnode_is_registered(devnode))
101 	if (!devnode->fops->poll)
103 	return devnode->fops->poll(filp, poll);
111 	struct media_devnode *devnode = media_devnode_data(filp);
116 	if (!media_devnode_is_registered(devnode))
124 	struct media_devnode *devnode = media_devnode_data(filp);
126 	return __media_ioctl(filp, cmd, arg, devnode->fops->ioctl);
134 	struct media_devnode *devnode = media_devnode_data(filp);
136 	return __media_ioctl(filp, cmd, arg, devnode->fops->compat_ioctl);
144 	struct media_devnode *devnode;
154 	devnode = container_of(inode->i_cdev, struct media_devnode, cdev);
157 	if (!media_devnode_is_registered(devnode)) {
162 	get_device(&devnode->dev);
165 	filp->private_data = devnode;
167 	if (devnode->fops->open) {
168 		ret = devnode->fops->open(filp);
170 			put_device(&devnode->dev);
182 	struct media_devnode *devnode = media_devnode_data(filp);
184 	if (devnode->fops->release)
185 		devnode->fops->release(filp);
191 	put_device(&devnode->dev);
211 					struct media_devnode *devnode,
223 		kfree(devnode);
230 	devnode->minor = minor;
231 	devnode->media_dev = mdev;
234 	devnode->dev.bus = &media_bus_type;
235 	devnode->dev.devt = MKDEV(MAJOR(media_dev_t), devnode->minor);
236 	devnode->dev.release = media_devnode_release;
237 	if (devnode->parent)
238 		devnode->dev.parent = devnode->parent;
239 	dev_set_name(&devnode->dev, "media%d", devnode->minor);
240 	device_initialize(&devnode->dev);
243 	cdev_init(&devnode->cdev, &media_devnode_fops);
244 	devnode->cdev.owner = owner;
245 	kobject_set_name(&devnode->cdev.kobj, "media%d", devnode->minor);
248 	ret = cdev_device_add(&devnode->cdev, &devnode->dev);
255 	set_bit(MEDIA_FLAG_REGISTERED, &devnode->flags);
261 	clear_bit(devnode->minor, media_devnode_nums);
262 	devnode->media_dev = NULL;
265 	put_device(&devnode->dev);
269 void media_devnode_unregister_prepare(struct media_devnode *devnode)
271 	/* Check if devnode was ever registered at all */
272 	if (!media_devnode_is_registered(devnode))
276 	clear_bit(MEDIA_FLAG_REGISTERED, &devnode->flags);
280 void media_devnode_unregister(struct media_devnode *devnode)
284 	cdev_device_del(&devnode->cdev, &devnode->dev);
285 	devnode->media_dev = NULL;
288 	put_device(&devnode->dev);