diff options
Diffstat (limited to 'drivers/media/video/v4l2-device.c')
| -rw-r--r-- | drivers/media/video/v4l2-device.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c deleted file mode 100644 index ce64fe16bc6..00000000000 --- a/drivers/media/video/v4l2-device.c +++ /dev/null @@ -1,164 +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/i2c.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_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)) - v4l2_warn(v4l2_dev, "Non-NULL drvdata on register\n"); - dev_set_drvdata(dev, v4l2_dev); - return 0; -} -EXPORT_SYMBOL_GPL(v4l2_device_register); - -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) { - dev_set_drvdata(v4l2_dev->dev, NULL); - 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) -{ - 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) - 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); - return err; - } - 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); - -void v4l2_device_unregister_subdev(struct v4l2_subdev *sd) -{ - /* return if it isn't registered */ - if (sd == NULL || sd->v4l2_dev == NULL) - return; - spin_lock(&sd->v4l2_dev->lock); - list_del(&sd->list); - spin_unlock(&sd->v4l2_dev->lock); - if (sd->internal_ops && sd->internal_ops->unregistered) - sd->internal_ops->unregistered(sd); - sd->v4l2_dev = NULL; - module_put(sd->owner); -} -EXPORT_SYMBOL_GPL(v4l2_device_unregister_subdev); |