1 files changed, 0 insertions, 346 deletions
diff --git a/drivers/media/media-devnode.c b/drivers/media/media-devnode.c
deleted file mode 100644
index fb0f0469fad7..000000000000
--- a/drivers/media/media-devnode.c
+++ /dev/null
@@ -1,346 +0,0 @@
-/*
- * Media device node
- *
- * Copyright (C) 2010 Nokia Corporation
- *
- * Based on drivers/media/video/v4l2_dev.c code authored by
- *	Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
- *	Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
- *
- * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
- *	     Sakari Ailus <sakari.ailus@iki.fi>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
- * --
- *
- * Generic media device node infrastructure to register and unregister
- * character devices using a dynamic major number and proper reference
- * counting.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/kmod.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/uaccess.h>
-
-#include <media/media-devnode.h>
-
-#define MEDIA_NUM_DEVICES	256
-#define MEDIA_NAME		"media"
-
-static dev_t media_dev_t;
-
-/*
- *	Active devices
- */
-static DEFINE_MUTEX(media_devnode_lock);
-static DECLARE_BITMAP(media_devnode_nums, MEDIA_NUM_DEVICES);
-
-/* Called when the last user of the media device exits. */
-static void media_devnode_release(struct device *cd)
-{
-	struct media_devnode *mdev = to_media_devnode(cd);
-
-	mutex_lock(&media_devnode_lock);
-
-	/* Delete the cdev on this minor as well */
-	cdev_del(&mdev->cdev);
-
-	/* Mark device node number as free */
-	clear_bit(mdev->minor, media_devnode_nums);
-
-	mutex_unlock(&media_devnode_lock);
-
-	/* Release media_devnode and perform other cleanups as needed. */
-	if (mdev->release)
-		mdev->release(mdev);
-}
-
-static struct bus_type media_bus_type = {
-	.name = MEDIA_NAME,
-};
-
-static ssize_t media_read(struct file *filp, char __user *buf,
-		size_t sz, loff_t *off)
-{
-	struct media_devnode *mdev = media_devnode_data(filp);
-
-	if (!mdev->fops->read)
-		return -EINVAL;
-	if (!media_devnode_is_registered(mdev))
-		return -EIO;
-	return mdev->fops->read(filp, buf, sz, off);
-}
-
-static ssize_t media_write(struct file *filp, const char __user *buf,
-		size_t sz, loff_t *off)
-{
-	struct media_devnode *mdev = media_devnode_data(filp);
-
-	if (!mdev->fops->write)
-		return -EINVAL;
-	if (!media_devnode_is_registered(mdev))
-		return -EIO;
-	return mdev->fops->write(filp, buf, sz, off);
-}
-
-static unsigned int media_poll(struct file *filp,
-			       struct poll_table_struct *poll)
-{
-	struct media_devnode *mdev = media_devnode_data(filp);
-
-	if (!media_devnode_is_registered(mdev))
-		return POLLERR | POLLHUP;
-	if (!mdev->fops->poll)
-		return DEFAULT_POLLMASK;
-	return mdev->fops->poll(filp, poll);
-}
-
-static long
-__media_ioctl(struct file *filp, unsigned int cmd, unsigned long arg,
-	      long (*ioctl_func)(struct file *filp, unsigned int cmd,
-				 unsigned long arg))
-{
-	struct media_devnode *mdev = media_devnode_data(filp);
-
-	if (!ioctl_func)
-		return -ENOTTY;
-
-	if (!media_devnode_is_registered(mdev))
-		return -EIO;
-
-	return ioctl_func(filp, cmd, arg);
-}
-
-static long media_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
-	struct media_devnode *mdev = media_devnode_data(filp);
-
-	return __media_ioctl(filp, cmd, arg, mdev->fops->ioctl);
-}
-
-#ifdef CONFIG_COMPAT
-
-static long media_compat_ioctl(struct file *filp, unsigned int cmd,
-			       unsigned long arg)
-{
-	struct media_devnode *mdev = media_devnode_data(filp);
-
-	return __media_ioctl(filp, cmd, arg, mdev->fops->compat_ioctl);
-}
-
-#endif /* CONFIG_COMPAT */
-
-/* Override for the open function */
-static int media_open(struct inode *inode, struct file *filp)
-{
-	struct media_devnode *mdev;
-	int ret;
-
-	/* Check if the media device is available. This needs to be done with
-	 * the media_devnode_lock held to prevent an open/unregister race:
-	 * without the lock, the device could be unregistered and freed between
-	 * the media_devnode_is_registered() and get_device() calls, leading to
-	 * a crash.
-	 */
-	mutex_lock(&media_devnode_lock);
-	mdev = container_of(inode->i_cdev, struct media_devnode, cdev);
-	/* return ENXIO if the media device has been removed
-	   already or if it is not registered anymore. */
-	if (!media_devnode_is_registered(mdev)) {
-		mutex_unlock(&media_devnode_lock);
-		return -ENXIO;
-	}
-	/* and increase the device refcount */
-	get_device(&mdev->dev);
-	mutex_unlock(&media_devnode_lock);
-
-	filp->private_data = mdev;
-
-	if (mdev->fops->open) {
-		ret = mdev->fops->open(filp);
-		if (ret) {
-			put_device(&mdev->dev);
-			return ret;
-		}
-	}
-
-	return 0;
-}
-
-/* Override for the release function */
-static int media_release(struct inode *inode, struct file *filp)
-{
-	struct media_devnode *mdev = media_devnode_data(filp);
-	int ret = 0;
-
-	if (mdev->fops->release)
-		mdev->fops->release(filp);
-
-	/* decrease the refcount unconditionally since the release()
-	   return value is ignored. */
-	put_device(&mdev->dev);
-	filp->private_data = NULL;
-	return ret;
-}
-
-static const struct file_operations media_devnode_fops = {
-	.owner = THIS_MODULE,
-	.read = media_read,
-	.write = media_write,
-	.open = media_open,
-	.unlocked_ioctl = media_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl = media_compat_ioctl,
-#endif /* CONFIG_COMPAT */
-	.release = media_release,
-	.poll = media_poll,
-	.llseek = no_llseek,
-};
-
-/**
- * media_devnode_register - register a media device node
- * @mdev: media device node structure we want to register
- *
- * The registration code assigns minor numbers and registers the new device node
- * with the kernel. An error is returned if no free minor number can be found,
- * or if the registration of the device node fails.
- *
- * Zero is returned on success.
- *
- * Note that if the media_devnode_register call fails, the release() callback of
- * the media_devnode structure is *not* called, so the caller is responsible for
- * freeing any data.
- */
-int __must_check media_devnode_register(struct media_devnode *mdev)
-{
-	int minor;
-	int ret;
-
-	/* Part 1: Find a free minor number */
-	mutex_lock(&media_devnode_lock);
-	minor = find_next_zero_bit(media_devnode_nums, MEDIA_NUM_DEVICES, 0);
-	if (minor == MEDIA_NUM_DEVICES) {
-		mutex_unlock(&media_devnode_lock);
-		pr_err("could not get a free minor\n");
-		return -ENFILE;
-	}
-
-	set_bit(minor, media_devnode_nums);
-	mutex_unlock(&media_devnode_lock);
-
-	mdev->minor = minor;
-
-	/* Part 2: Initialize and register the character device */
-	cdev_init(&mdev->cdev, &media_devnode_fops);
-	mdev->cdev.owner = mdev->fops->owner;
-
-	ret = cdev_add(&mdev->cdev, MKDEV(MAJOR(media_dev_t), mdev->minor), 1);
-	if (ret < 0) {
-		pr_err("%s: cdev_add failed\n", __func__);
-		goto error;
-	}
-
-	/* Part 3: Register the media device */
-	mdev->dev.bus = &media_bus_type;
-	mdev->dev.devt = MKDEV(MAJOR(media_dev_t), mdev->minor);
-	mdev->dev.release = media_devnode_release;
-	if (mdev->parent)
-		mdev->dev.parent = mdev->parent;
-	dev_set_name(&mdev->dev, "media%d", mdev->minor);
-	ret = device_register(&mdev->dev);
-	if (ret < 0) {
-		pr_err("%s: device_register failed\n", __func__);
-		goto error;
-	}
-
-	/* Part 4: Activate this minor. The char device can now be used. */
-	set_bit(MEDIA_FLAG_REGISTERED, &mdev->flags);
-
-	return 0;
-
-error:
-	cdev_del(&mdev->cdev);
-	clear_bit(mdev->minor, media_devnode_nums);
-	return ret;
-}
-
-/**
- * media_devnode_unregister - unregister a media device node
- * @mdev: the device node to unregister
- *
- * This unregisters the passed device. Future open calls will be met with
- * errors.
- *
- * This function can safely be called if the device node has never been
- * registered or has already been unregistered.
- */
-void media_devnode_unregister(struct media_devnode *mdev)
-{
-	/* Check if mdev was ever registered at all */
-	if (!media_devnode_is_registered(mdev))
-		return;
-
-	mutex_lock(&media_devnode_lock);
-	clear_bit(MEDIA_FLAG_REGISTERED, &mdev->flags);
-	mutex_unlock(&media_devnode_lock);
-	device_unregister(&mdev->dev);
-}
-
-/*
- *	Initialise media for linux
- */
-static int __init media_devnode_init(void)
-{
-	int ret;
-
-	pr_info("Linux media interface: v0.10\n");
-	ret = alloc_chrdev_region(&media_dev_t, 0, MEDIA_NUM_DEVICES,
-				  MEDIA_NAME);
-	if (ret < 0) {
-		pr_warn("unable to allocate major\n");
-		return ret;
-	}
-
-	ret = bus_register(&media_bus_type);
-	if (ret < 0) {
-		unregister_chrdev_region(media_dev_t, MEDIA_NUM_DEVICES);
-		pr_warn("bus_register failed\n");
-		return -EIO;
-	}
-
-	return 0;
-}
-
-static void __exit media_devnode_exit(void)
-{
-	bus_unregister(&media_bus_type);
-	unregister_chrdev_region(media_dev_t, MEDIA_NUM_DEVICES);
-}
-
-subsys_initcall(media_devnode_init);
-module_exit(media_devnode_exit)
-
-MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
-MODULE_DESCRIPTION("Device node registration for media drivers");
-MODULE_LICENSE("GPL");