#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
-#include <linux/kref.h>
#include <linux/usb.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
#include "stk-webcam.h"
};
MODULE_DEVICE_TABLE(usb, stkwebcam_table);
-static void stk_camera_cleanup(struct kref *kref)
-{
- struct stk_camera *dev = to_stk_camera(kref);
-
- STK_INFO("Syntek USB2.0 Camera release resources"
- " video device /dev/video%d\n", dev->vdev.minor);
- video_unregister_device(&dev->vdev);
- dev->vdev.priv = NULL;
-
- if (dev->sio_bufs != NULL || dev->isobufs != NULL)
- STK_ERROR("We are leaking memory\n");
- usb_put_intf(dev->interface);
- kfree(dev);
-}
-
-
/*
* Basic stuff
*/
{
int ret;
- ret = video_device_create_file(vdev, &dev_attr_brightness);
- ret += video_device_create_file(vdev, &dev_attr_hflip);
- ret += video_device_create_file(vdev, &dev_attr_vflip);
+ ret = device_create_file(&vdev->dev, &dev_attr_brightness);
+ ret += device_create_file(&vdev->dev, &dev_attr_hflip);
+ ret += device_create_file(&vdev->dev, &dev_attr_vflip);
+ if (ret)
+ STK_WARNING("Could not create sysfs files\n");
return ret;
}
static void stk_remove_sysfs_files(struct video_device *vdev)
{
- video_device_remove_file(vdev, &dev_attr_brightness);
- video_device_remove_file(vdev, &dev_attr_hflip);
- video_device_remove_file(vdev, &dev_attr_vflip);
+ device_remove_file(&vdev->dev, &dev_attr_brightness);
+ device_remove_file(&vdev->dev, &dev_attr_hflip);
+ device_remove_file(&vdev->dev, &dev_attr_vflip);
}
#else
fb->v4lbuf.bytesused = 0;
fill = fb->buffer;
} else if (fb->v4lbuf.bytesused == dev->frame_size) {
- list_move_tail(dev->sio_avail.next,
- &dev->sio_full);
- wake_up(&dev->wait_frame);
- if (list_empty(&dev->sio_avail)) {
- (void) (printk_ratelimit() &&
- STK_ERROR("No buffer available\n"));
- goto resubmit;
+ if (list_is_singular(&dev->sio_avail)) {
+ /* Always reuse the last buffer */
+ fb->v4lbuf.bytesused = 0;
+ fill = fb->buffer;
+ } else {
+ list_move_tail(dev->sio_avail.next,
+ &dev->sio_full);
+ wake_up(&dev->wait_frame);
+ fb = list_first_entry(&dev->sio_avail,
+ struct stk_sio_buffer, list);
+ fb->v4lbuf.bytesused = 0;
+ fill = fb->buffer;
}
- fb = list_first_entry(&dev->sio_avail,
- struct stk_sio_buffer, list);
- fb->v4lbuf.bytesused = 0;
- fill = fb->buffer;
}
} else {
framelen -= 4;
urb = dev->isobufs[i].urb;
if (urb) {
- if (atomic_read(&dev->urbs_used))
+ if (atomic_read(&dev->urbs_used) && is_present(dev))
usb_kill_urb(urb);
usb_free_urb(urb);
}
vdev = video_devdata(fp);
dev = vdev_to_camera(vdev);
- if (dev == NULL || !is_present(dev))
+ lock_kernel();
+ if (dev == NULL || !is_present(dev)) {
+ unlock_kernel();
return -ENXIO;
- fp->private_data = vdev;
- kref_get(&dev->kref);
+ }
+ fp->private_data = dev;
usb_autopm_get_interface(dev->interface);
+ unlock_kernel();
return 0;
}
static int v4l_stk_release(struct inode *inode, struct file *fp)
{
- struct stk_camera *dev;
- struct video_device *vdev;
+ struct stk_camera *dev = fp->private_data;
- vdev = video_devdata(fp);
- if (vdev == NULL) {
- STK_ERROR("v4l_release called w/o video devdata\n");
- return -EFAULT;
- }
- dev = vdev_to_camera(vdev);
- if (dev == NULL) {
- STK_ERROR("v4l_release called on removed device\n");
- return -ENODEV;
+ if (dev->owner == fp) {
+ stk_stop_stream(dev);
+ stk_free_buffers(dev);
+ dev->owner = NULL;
}
- if (dev->owner != fp) {
+ if(is_present(dev))
usb_autopm_put_interface(dev->interface);
- kref_put(&dev->kref, stk_camera_cleanup);
- return 0;
- }
-
- stk_stop_stream(dev);
-
- stk_free_buffers(dev);
-
- dev->owner = NULL;
-
- usb_autopm_put_interface(dev->interface);
- kref_put(&dev->kref, stk_camera_cleanup);
return 0;
}
int i;
int ret;
unsigned long flags;
- struct stk_camera *dev;
- struct video_device *vdev;
struct stk_sio_buffer *sbuf;
-
- vdev = video_devdata(fp);
- if (vdev == NULL)
- return -EFAULT;
- dev = vdev_to_camera(vdev);
-
- if (dev == NULL)
- return -EIO;
+ struct stk_camera *dev = fp->private_data;
if (!is_present(dev))
return -EIO;
static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
{
- struct stk_camera *dev;
- struct video_device *vdev;
-
- vdev = video_devdata(fp);
-
- if (vdev == NULL)
- return -EFAULT;
-
- dev = vdev_to_camera(vdev);
- if (dev == NULL)
- return -ENODEV;
+ struct stk_camera *dev = fp->private_data;
poll_wait(fp, &dev->wait_frame, wait);
unsigned int i;
int ret;
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- struct stk_camera *dev;
- struct video_device *vdev;
+ struct stk_camera *dev = fp->private_data;
struct stk_sio_buffer *sbuf = NULL;
if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
return -EINVAL;
- vdev = video_devdata(fp);
- dev = vdev_to_camera(vdev);
-
for (i = 0; i < dev->n_sbufs; i++) {
if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
sbuf = dev->sio_bufs + i;
.llseek = no_llseek
};
-static void stk_v4l_dev_release(struct video_device *vd)
-{
-}
-
-static struct video_device stk_v4l_data = {
- .name = "stkwebcam",
- .type = VFL_TYPE_GRABBER,
- .type2 = VID_TYPE_CAPTURE,
- .minor = -1,
- .tvnorms = V4L2_STD_UNKNOWN,
- .current_norm = V4L2_STD_UNKNOWN,
- .fops = &v4l_stk_fops,
- .release = stk_v4l_dev_release,
-
+static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
.vidioc_querycap = stk_vidioc_querycap,
.vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
.vidioc_g_parm = stk_vidioc_g_parm,
};
+static void stk_v4l_dev_release(struct video_device *vd)
+{
+ struct stk_camera *dev = vdev_to_camera(vd);
+
+ if (dev->sio_bufs != NULL || dev->isobufs != NULL)
+ STK_ERROR("We are leaking memory\n");
+ usb_put_intf(dev->interface);
+ kfree(dev);
+}
+
+static struct video_device stk_v4l_data = {
+ .name = "stkwebcam",
+ .minor = -1,
+ .tvnorms = V4L2_STD_UNKNOWN,
+ .current_norm = V4L2_STD_UNKNOWN,
+ .fops = &v4l_stk_fops,
+ .ioctl_ops = &v4l_stk_ioctl_ops,
+ .release = stk_v4l_dev_release,
+};
+
static int stk_register_video_device(struct stk_camera *dev)
{
dev->vdev = stk_v4l_data;
dev->vdev.debug = debug;
- dev->vdev.dev = &dev->interface->dev;
- dev->vdev.priv = dev;
+ dev->vdev.parent = &dev->interface->dev;
err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
if (err)
STK_ERROR("v4l registration failed\n");
else
STK_INFO("Syntek USB2.0 Camera is now controlling video device"
- " /dev/video%d\n", dev->vdev.minor);
+ " /dev/video%d\n", dev->vdev.num);
return err;
}
const struct usb_device_id *id)
{
int i;
- int err;
+ int err = 0;
struct stk_camera *dev = NULL;
struct usb_device *udev = interface_to_usbdev(interface);
return -ENOMEM;
}
- kref_init(&dev->kref);
spin_lock_init(&dev->spinlock);
init_waitqueue_head(&dev->wait_frame);
}
if (!dev->isoc_ep) {
STK_ERROR("Could not find isoc-in endpoint");
- kref_put(&dev->kref, stk_camera_cleanup);
- return -ENODEV;
+ err = -ENODEV;
+ goto error;
}
dev->vsettings.brightness = 0x7fff;
dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
err = stk_register_video_device(dev);
if (err) {
- kref_put(&dev->kref, stk_camera_cleanup);
- return err;
+ goto error;
}
stk_create_sysfs_files(&dev->vdev);
usb_autopm_enable(dev->interface);
return 0;
+
+error:
+ kfree(dev);
+ return err;
}
static void stk_camera_disconnect(struct usb_interface *interface)
wake_up_interruptible(&dev->wait_frame);
stk_remove_sysfs_files(&dev->vdev);
- kref_put(&dev->kref, stk_camera_cleanup);
+ STK_INFO("Syntek USB2.0 Camera release resources "
+ "video device /dev/video%d\n", dev->vdev.num);
+
+ video_unregister_device(&dev->vdev);
}
#ifdef CONFIG_PM
projects / linux-2.6-omap-h63xx.git / blobdiff