svo : open and release

Change-Id: I6d1f7f0c4f28aa29dc4a4a1bbd4f0f8329fb2b23

diff --git a/drivers/media/video/svo.c b/drivers/media/video/svo.c
index e896c01f07809c2e820df0666701d96fab501c52..4037e037c316bd07bed89956ff4fbf62dae4cc6b 100755 (executable)
--- a/drivers/media/video/svo.c
+++ b/drivers/media/video/svo.c
@@ -27,26 +27,51 @@ static struct pci_device_id svo_pci_tbl[] = {
 struct svo {
        struct pci_dev *pci_dev;                /* pci device */
        struct video_device *video_dev;         /* video device parameters */
+
        unsigned char __iomem *svo_mem;         /* svo: memory */
        unsigned char __iomem *svo_mmregs;      /* svo: memory mapped registers */
+
+       unsigned long in_use;                   /* set to 1 if the device is in use */
+};
+
+/* driver structure - only one possible */
+static struct svo svo;
+
+/****************************************************************************/
+/* video4linux integration                                                  */
+/****************************************************************************/
+
+static int svo_open(struct file *file)
+{
+       if (test_and_set_bit(0, &svo.in_use))
+               return -EBUSY;
+
+       return 0;
+}
+
+static int svo_release(struct file *file)
+{
+       // TODO: overlay off
+       clear_bit(0, &svo.in_use);
+       return 0;
+}
+
+static const struct v4l2_ioctl_ops svo_ioctl_ops = {
+       // TODO: fill it
 };
 
 static const struct v4l2_file_operations svo_fops = {
        .owner          = THIS_MODULE,
-//     .open           = meye_open,
-//     .release        = meye_release,
+       .open           = svo_open,
+       .release        = svo_release,
 //     .mmap           = meye_mmap,
        .ioctl          = video_ioctl2,
-//     .poll           = meye_poll,
 };
 
-/* driver structure - only one possible */
-static struct svo svo;
-
 static struct video_device svo_template = {
        .name           = "svo",
        .fops           = &svo_fops,
-//     .ioctl_ops      = &meye_ioctl_ops,
+       .ioctl_ops      = &svo_ioctl_ops,
        .release        = video_device_release,
        .minor          = -1,
 };