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Diffstat (limited to 'drivers/media/video/v4l2-device.c')
-rw-r--r--drivers/media/video/v4l2-device.c280
1 files changed, 0 insertions, 280 deletions
diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c
deleted file mode 100644
index 1f203b8..0000000
--- a/drivers/media/video/v4l2-device.c
+++ /dev/null
@@ -1,280 +0,0 @@
-/*
- V4L2 device support.
-
- Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- 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
- */
-
-#include <linux/types.h>
-#include <linux/ioctl.h>
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/slab.h>
-#if defined(CONFIG_SPI)
-#include <linux/spi/spi.h>
-#endif
-#include <linux/videodev2.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-ctrls.h>
-
-int v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev)
-{
- if (v4l2_dev == NULL)
- return -EINVAL;
-
- INIT_LIST_HEAD(&v4l2_dev->subdevs);
- spin_lock_init(&v4l2_dev->lock);
- mutex_init(&v4l2_dev->ioctl_lock);
- v4l2_prio_init(&v4l2_dev->prio);
- kref_init(&v4l2_dev->ref);
- get_device(dev);
- v4l2_dev->dev = dev;
- if (dev == NULL) {
- /* If dev == NULL, then name must be filled in by the caller */
- WARN_ON(!v4l2_dev->name[0]);
- return 0;
- }
-
- /* Set name to driver name + device name if it is empty. */
- if (!v4l2_dev->name[0])
- snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "%s %s",
- dev->driver->name, dev_name(dev));
- if (!dev_get_drvdata(dev))
- dev_set_drvdata(dev, v4l2_dev);
- return 0;
-}
-EXPORT_SYMBOL_GPL(v4l2_device_register);
-
-static void v4l2_device_release(struct kref *ref)
-{
- struct v4l2_device *v4l2_dev =
- container_of(ref, struct v4l2_device, ref);
-
- if (v4l2_dev->release)
- v4l2_dev->release(v4l2_dev);
-}
-
-int v4l2_device_put(struct v4l2_device *v4l2_dev)
-{
- return kref_put(&v4l2_dev->ref, v4l2_device_release);
-}
-EXPORT_SYMBOL_GPL(v4l2_device_put);
-
-int v4l2_device_set_name(struct v4l2_device *v4l2_dev, const char *basename,
- atomic_t *instance)
-{
- int num = atomic_inc_return(instance) - 1;
- int len = strlen(basename);
-
- if (basename[len - 1] >= '0' && basename[len - 1] <= '9')
- snprintf(v4l2_dev->name, sizeof(v4l2_dev->name),
- "%s-%d", basename, num);
- else
- snprintf(v4l2_dev->name, sizeof(v4l2_dev->name),
- "%s%d", basename, num);
- return num;
-}
-EXPORT_SYMBOL_GPL(v4l2_device_set_name);
-
-void v4l2_device_disconnect(struct v4l2_device *v4l2_dev)
-{
- if (v4l2_dev->dev == NULL)
- return;
-
- if (dev_get_drvdata(v4l2_dev->dev) == v4l2_dev)
- dev_set_drvdata(v4l2_dev->dev, NULL);
- put_device(v4l2_dev->dev);
- v4l2_dev->dev = NULL;
-}
-EXPORT_SYMBOL_GPL(v4l2_device_disconnect);
-
-void v4l2_device_unregister(struct v4l2_device *v4l2_dev)
-{
- struct v4l2_subdev *sd, *next;
-
- if (v4l2_dev == NULL)
- return;
- v4l2_device_disconnect(v4l2_dev);
-
- /* Unregister subdevs */
- list_for_each_entry_safe(sd, next, &v4l2_dev->subdevs, list) {
- v4l2_device_unregister_subdev(sd);
-#if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
- if (sd->flags & V4L2_SUBDEV_FL_IS_I2C) {
- struct i2c_client *client = v4l2_get_subdevdata(sd);
-
- /* We need to unregister the i2c client explicitly.
- We cannot rely on i2c_del_adapter to always
- unregister clients for us, since if the i2c bus
- is a platform bus, then it is never deleted. */
- if (client)
- i2c_unregister_device(client);
- continue;
- }
-#endif
-#if defined(CONFIG_SPI)
- if (sd->flags & V4L2_SUBDEV_FL_IS_SPI) {
- struct spi_device *spi = v4l2_get_subdevdata(sd);
-
- if (spi)
- spi_unregister_device(spi);
- continue;
- }
-#endif
- }
-}
-EXPORT_SYMBOL_GPL(v4l2_device_unregister);
-
-int v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
- struct v4l2_subdev *sd)
-{
-#if defined(CONFIG_MEDIA_CONTROLLER)
- struct media_entity *entity = &sd->entity;
-#endif
- int err;
-
- /* Check for valid input */
- if (v4l2_dev == NULL || sd == NULL || !sd->name[0])
- return -EINVAL;
-
- /* Warn if we apparently re-register a subdev */
- WARN_ON(sd->v4l2_dev != NULL);
-
- if (!try_module_get(sd->owner))
- return -ENODEV;
-
- sd->v4l2_dev = v4l2_dev;
- if (sd->internal_ops && sd->internal_ops->registered) {
- err = sd->internal_ops->registered(sd);
- if (err) {
- module_put(sd->owner);
- return err;
- }
- }
-
- /* This just returns 0 if either of the two args is NULL */
- err = v4l2_ctrl_add_handler(v4l2_dev->ctrl_handler, sd->ctrl_handler);
- if (err) {
- if (sd->internal_ops && sd->internal_ops->unregistered)
- sd->internal_ops->unregistered(sd);
- module_put(sd->owner);
- return err;
- }
-
-#if defined(CONFIG_MEDIA_CONTROLLER)
- /* Register the entity. */
- if (v4l2_dev->mdev) {
- err = media_device_register_entity(v4l2_dev->mdev, entity);
- if (err < 0) {
- if (sd->internal_ops && sd->internal_ops->unregistered)
- sd->internal_ops->unregistered(sd);
- module_put(sd->owner);
- return err;
- }
- }
-#endif
-
- spin_lock(&v4l2_dev->lock);
- list_add_tail(&sd->list, &v4l2_dev->subdevs);
- spin_unlock(&v4l2_dev->lock);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(v4l2_device_register_subdev);
-
-static void v4l2_device_release_subdev_node(struct video_device *vdev)
-{
- struct v4l2_subdev *sd = video_get_drvdata(vdev);
- sd->devnode = NULL;
- kfree(vdev);
-}
-
-int v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev)
-{
- struct video_device *vdev;
- struct v4l2_subdev *sd;
- int err;
-
- /* Register a device node for every subdev marked with the
- * V4L2_SUBDEV_FL_HAS_DEVNODE flag.
- */
- list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
- if (!(sd->flags & V4L2_SUBDEV_FL_HAS_DEVNODE))
- continue;
-
- vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
- if (!vdev) {
- err = -ENOMEM;
- goto clean_up;
- }
-
- video_set_drvdata(vdev, sd);
- strlcpy(vdev->name, sd->name, sizeof(vdev->name));
- vdev->v4l2_dev = v4l2_dev;
- vdev->fops = &v4l2_subdev_fops;
- vdev->release = v4l2_device_release_subdev_node;
- vdev->ctrl_handler = sd->ctrl_handler;
- err = __video_register_device(vdev, VFL_TYPE_SUBDEV, -1, 1,
- sd->owner);
- if (err < 0) {
- kfree(vdev);
- goto clean_up;
- }
-#if defined(CONFIG_MEDIA_CONTROLLER)
- sd->entity.info.v4l.major = VIDEO_MAJOR;
- sd->entity.info.v4l.minor = vdev->minor;
-#endif
- sd->devnode = vdev;
- }
- return 0;
-
-clean_up:
- list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
- if (!sd->devnode)
- break;
- video_unregister_device(sd->devnode);
- }
-
- return err;
-}
-EXPORT_SYMBOL_GPL(v4l2_device_register_subdev_nodes);
-
-void v4l2_device_unregister_subdev(struct v4l2_subdev *sd)
-{
- struct v4l2_device *v4l2_dev;
-
- /* return if it isn't registered */
- if (sd == NULL || sd->v4l2_dev == NULL)
- return;
-
- v4l2_dev = sd->v4l2_dev;
-
- spin_lock(&v4l2_dev->lock);
- list_del(&sd->list);
- spin_unlock(&v4l2_dev->lock);
-
- if (sd->internal_ops && sd->internal_ops->unregistered)
- sd->internal_ops->unregistered(sd);
- sd->v4l2_dev = NULL;
-
-#if defined(CONFIG_MEDIA_CONTROLLER)
- if (v4l2_dev->mdev)
- media_device_unregister_entity(&sd->entity);
-#endif
- video_unregister_device(sd->devnode);
- module_put(sd->owner);
-}
-EXPORT_SYMBOL_GPL(v4l2_device_unregister_subdev);
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