#include <linux/delay.h>
#include <linux/videodev.h>
#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
#include <linux/parport.h>
-//#define DEBUG // Undef me for production
+/*#define DEBUG*/ /* Undef me for production */
#ifdef DEBUG
-#define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __FUNCTION__ , ##a)
+#define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __func__ , ##a)
#else
#define DPRINTF(x...)
#endif
signed char contrast;
signed char color;
signed char hue;
+ unsigned long in_use;
};
/*
\tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n\
\tcam 1 to parport3 and search every parport for cam 2 etc...");
-static int parmode = 0;
+static int parmode;
module_param(parmode, int, 0);
MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp");
static int w9966_i2c_rbyte(struct w9966_dev* cam);
#endif
-static int w9966_v4l_ioctl(struct inode *inode, struct file *file,
+static long w9966_v4l_ioctl(struct file *file,
unsigned int cmd, unsigned long arg);
static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos);
-static const struct file_operations w9966_fops = {
+static int w9966_exclusive_open(struct file *file)
+{
+ struct w9966_dev *cam = video_drvdata(file);
+
+ return test_and_set_bit(0, &cam->in_use) ? -EBUSY : 0;
+}
+
+static int w9966_exclusive_release(struct file *file)
+{
+ struct w9966_dev *cam = video_drvdata(file);
+
+ clear_bit(0, &cam->in_use);
+ return 0;
+}
+
+static const struct v4l2_file_operations w9966_fops = {
.owner = THIS_MODULE,
- .open = video_exclusive_open,
- .release = video_exclusive_release,
+ .open = w9966_exclusive_open,
+ .release = w9966_exclusive_release,
.ioctl = w9966_v4l_ioctl,
- .compat_ioctl = v4l_compat_ioctl32,
.read = w9966_v4l_read,
- .llseek = no_llseek,
};
static struct video_device w9966_template = {
- .owner = THIS_MODULE,
.name = W9966_DRIVERNAME,
- .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES,
- .hardware = VID_HARDWARE_W9966,
.fops = &w9966_fops,
+ .release = video_device_release_empty,
};
/*
// Fill in the video_device struct and register us to v4l
memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device));
- cam->vdev.priv = cam;
+ video_set_drvdata(&cam->vdev, cam);
- if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) == -1)
+ if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
return -1;
w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV);
* Video4linux interfacing
*/
-static int w9966_v4l_do_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, void *arg)
+static long w9966_v4l_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
- struct video_device *vdev = video_devdata(file);
- struct w9966_dev *cam = vdev->priv;
+ struct w9966_dev *cam = video_drvdata(file);
switch(cmd)
{
return 0;
}
-static int w9966_v4l_ioctl(struct inode *inode, struct file *file,
+static long w9966_v4l_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, w9966_v4l_do_ioctl);
+ return video_usercopy(file, cmd, arg, w9966_v4l_do_ioctl);
}
// Capture data
static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
- struct video_device *vdev = video_devdata(file);
- struct w9966_dev *cam = vdev->priv;
+ struct w9966_dev *cam = video_drvdata(file);
unsigned char addr = 0xa0; // ECP, read, CCD-transfer, 00000
unsigned char __user *dest = (unsigned char __user *)buf;
unsigned long dleft = count;