#include <linux/devfs_fs_kernel.h>
#include <asm/uaccess.h>
#include <asm/system.h>
-#include <asm/semaphore.h>
#include <linux/videodev.h>
{
struct video_device *vfd;
- vfd = kmalloc(sizeof(*vfd),GFP_KERNEL);
- if (NULL == vfd)
- return NULL;
- memset(vfd,0,sizeof(*vfd));
+ vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
return vfd;
}
{
struct video_device *vfd = container_of(cd, struct video_device, class_dev);
-#if 1 /* needed until all drivers are fixed */
+#if 1
+ /* needed until all drivers are fixed */
if (!vfd->release)
return;
#endif
}
static struct class video_class = {
- .name = VIDEO_NAME,
+ .name = VIDEO_NAME,
.release = video_release,
};
/*
- * Active devices
+ * Active devices
*/
-
+
static struct video_device *video_device[VIDEO_NUM_DEVICES];
-static DECLARE_MUTEX(videodev_lock);
+static DEFINE_MUTEX(videodev_lock);
struct video_device* video_devdata(struct file *file)
{
unsigned int minor = iminor(inode);
int err = 0;
struct video_device *vfl;
- struct file_operations *old_fops;
-
+ const struct file_operations *old_fops;
+
if(minor>=VIDEO_NUM_DEVICES)
return -ENODEV;
- down(&videodev_lock);
+ mutex_lock(&videodev_lock);
vfl=video_device[minor];
if(vfl==NULL) {
- up(&videodev_lock);
+ mutex_unlock(&videodev_lock);
request_module("char-major-%d-%d", VIDEO_MAJOR, minor);
- down(&videodev_lock);
+ mutex_lock(&videodev_lock);
vfl=video_device[minor];
if (vfl==NULL) {
- up(&videodev_lock);
+ mutex_unlock(&videodev_lock);
return -ENODEV;
}
}
file->f_op = fops_get(old_fops);
}
fops_put(old_fops);
- up(&videodev_lock);
+ mutex_unlock(&videodev_lock);
return err;
}
return -ENOMEM;
parg = mbuf;
}
-
+
err = -EFAULT;
if (_IOC_DIR(cmd) & _IOC_WRITE)
if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
}
out:
- if (mbuf)
- kfree(mbuf);
+ kfree(mbuf);
return err;
}
struct video_device *vfl = video_devdata(file);
int retval = 0;
- down(&vfl->lock);
+ mutex_lock(&vfl->lock);
if (vfl->users) {
retval = -EBUSY;
} else {
vfl->users++;
}
- up(&vfl->lock);
+ mutex_unlock(&vfl->lock);
return retval;
}
int video_exclusive_release(struct inode *inode, struct file *file)
{
struct video_device *vfl = video_devdata(file);
-
+
vfl->users--;
return 0;
}
* @type: type of device to register
* @nr: which device number (0 == /dev/video0, 1 == /dev/video1, ...
* -1 == first free)
- *
+ *
* The registration code assigns minor numbers based on the type
* requested. -ENFILE is returned in all the device slots for this
* category are full. If not then the minor field is set and the
*
* %VFL_TYPE_VBI - Vertical blank data (undecoded)
*
- * %VFL_TYPE_RADIO - A radio card
+ * %VFL_TYPE_RADIO - A radio card
*/
int video_register_device(struct video_device *vfd, int type, int nr)
int base;
int end;
char *name_base;
-
+
switch(type)
{
case VFL_TYPE_GRABBER:
- base=0;
- end=64;
+ base=MINOR_VFL_TYPE_GRABBER_MIN;
+ end=MINOR_VFL_TYPE_GRABBER_MAX+1;
name_base = "video";
break;
case VFL_TYPE_VTX:
- base=192;
- end=224;
+ base=MINOR_VFL_TYPE_VTX_MIN;
+ end=MINOR_VFL_TYPE_VTX_MAX+1;
name_base = "vtx";
break;
case VFL_TYPE_VBI:
- base=224;
- end=240;
+ base=MINOR_VFL_TYPE_VBI_MIN;
+ end=MINOR_VFL_TYPE_VBI_MAX+1;
name_base = "vbi";
break;
case VFL_TYPE_RADIO:
- base=64;
- end=128;
+ base=MINOR_VFL_TYPE_RADIO_MIN;
+ end=MINOR_VFL_TYPE_RADIO_MAX+1;
name_base = "radio";
break;
default:
}
/* pick a minor number */
- down(&videodev_lock);
+ mutex_lock(&videodev_lock);
if (nr >= 0 && nr < end-base) {
/* use the one the driver asked for */
i = base+nr;
if (NULL != video_device[i]) {
- up(&videodev_lock);
+ mutex_unlock(&videodev_lock);
return -ENFILE;
}
} else {
if (NULL == video_device[i])
break;
if (i == end) {
- up(&videodev_lock);
+ mutex_unlock(&videodev_lock);
return -ENFILE;
}
}
video_device[i]=vfd;
vfd->minor=i;
- up(&videodev_lock);
+ mutex_unlock(&videodev_lock);
sprintf(vfd->devfs_name, "v4l/%s%d", name_base, i - base);
devfs_mk_cdev(MKDEV(VIDEO_MAJOR, vfd->minor),
S_IFCHR | S_IRUSR | S_IWUSR, vfd->devfs_name);
- init_MUTEX(&vfd->lock);
+ mutex_init(&vfd->lock);
/* sysfs class */
- memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
+ memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
if (vfd->dev)
vfd->class_dev.dev = vfd->dev;
vfd->class_dev.class = &video_class;
- vfd->class_dev.devt = MKDEV(VIDEO_MAJOR, vfd->minor);
+ vfd->class_dev.devt = MKDEV(VIDEO_MAJOR, vfd->minor);
strlcpy(vfd->class_dev.class_id, vfd->devfs_name + 4, BUS_ID_SIZE);
class_device_register(&vfd->class_dev);
class_device_create_file(&vfd->class_dev,
- &class_device_attr_name);
+ &class_device_attr_name);
-#if 1 /* needed until all drivers are fixed */
+#if 1
+ /* needed until all drivers are fixed */
if (!vfd->release)
printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
"Please fix your driver for proper sysfs support, see "
* This unregisters the passed device and deassigns the minor
* number. Future open calls will be met with errors.
*/
-
+
void video_unregister_device(struct video_device *vfd)
{
- down(&videodev_lock);
+ mutex_lock(&videodev_lock);
if(video_device[vfd->minor]!=vfd)
panic("videodev: bad unregister");
devfs_remove(vfd->devfs_name);
video_device[vfd->minor]=NULL;
class_device_unregister(&vfd->class_dev);
- up(&videodev_lock);
+ mutex_unlock(&videodev_lock);
}
/*
* Initialise video for linux
*/
-
+
static int __init videodev_init(void)
{
int ret;
git://git.onelab.eu / linux-2.6.git / blobdiff