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path: root/drivers/media/common/saa7146/saa7146_fops.c
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Diffstat (limited to 'drivers/media/common/saa7146/saa7146_fops.c')
-rw-r--r--drivers/media/common/saa7146/saa7146_fops.c664
1 files changed, 664 insertions, 0 deletions
diff --git a/drivers/media/common/saa7146/saa7146_fops.c b/drivers/media/common/saa7146/saa7146_fops.c
new file mode 100644
index 000000000000..b3890bd49df6
--- /dev/null
+++ b/drivers/media/common/saa7146/saa7146_fops.c
@@ -0,0 +1,664 @@
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <media/saa7146_vv.h>
+#include <linux/module.h>
+
+/****************************************************************************/
+/* resource management functions, shamelessly stolen from saa7134 driver */
+
+int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
+{
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+
+ if (fh->resources & bit) {
+ DEB_D("already allocated! want: 0x%02x, cur:0x%02x\n",
+ bit, vv->resources);
+ /* have it already allocated */
+ return 1;
+ }
+
+ /* is it free? */
+ if (vv->resources & bit) {
+ DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n",
+ vv->resources, bit);
+ /* no, someone else uses it */
+ return 0;
+ }
+ /* it's free, grab it */
+ fh->resources |= bit;
+ vv->resources |= bit;
+ DEB_D("res: get 0x%02x, cur:0x%02x\n", bit, vv->resources);
+ return 1;
+}
+
+void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
+{
+ struct saa7146_dev *dev = fh->dev;
+ struct saa7146_vv *vv = dev->vv_data;
+
+ BUG_ON((fh->resources & bits) != bits);
+
+ fh->resources &= ~bits;
+ vv->resources &= ~bits;
+ DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources);
+}
+
+
+/********************************************************************************/
+/* common dma functions */
+
+void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
+ struct saa7146_buf *buf)
+{
+ struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
+ DEB_EE("dev:%p, buf:%p\n", dev, buf);
+
+ BUG_ON(in_interrupt());
+
+ videobuf_waiton(q, &buf->vb, 0, 0);
+ videobuf_dma_unmap(q->dev, dma);
+ videobuf_dma_free(dma);
+ buf->vb.state = VIDEOBUF_NEEDS_INIT;
+}
+
+
+/********************************************************************************/
+/* common buffer functions */
+
+int saa7146_buffer_queue(struct saa7146_dev *dev,
+ struct saa7146_dmaqueue *q,
+ struct saa7146_buf *buf)
+{
+ assert_spin_locked(&dev->slock);
+ DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf);
+
+ BUG_ON(!q);
+
+ if (NULL == q->curr) {
+ q->curr = buf;
+ DEB_D("immediately activating buffer %p\n", buf);
+ buf->activate(dev,buf,NULL);
+ } else {
+ list_add_tail(&buf->vb.queue,&q->queue);
+ buf->vb.state = VIDEOBUF_QUEUED;
+ DEB_D("adding buffer %p to queue. (active buffer present)\n",
+ buf);
+ }
+ return 0;
+}
+
+void saa7146_buffer_finish(struct saa7146_dev *dev,
+ struct saa7146_dmaqueue *q,
+ int state)
+{
+ assert_spin_locked(&dev->slock);
+ DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state);
+ DEB_EE("q->curr:%p\n", q->curr);
+
+ BUG_ON(!q->curr);
+
+ /* finish current buffer */
+ if (NULL == q->curr) {
+ DEB_D("aiii. no current buffer\n");
+ return;
+ }
+
+ q->curr->vb.state = state;
+ do_gettimeofday(&q->curr->vb.ts);
+ wake_up(&q->curr->vb.done);
+
+ q->curr = NULL;
+}
+
+void saa7146_buffer_next(struct saa7146_dev *dev,
+ struct saa7146_dmaqueue *q, int vbi)
+{
+ struct saa7146_buf *buf,*next = NULL;
+
+ BUG_ON(!q);
+
+ DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi);
+
+ assert_spin_locked(&dev->slock);
+ if (!list_empty(&q->queue)) {
+ /* activate next one from queue */
+ buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
+ list_del(&buf->vb.queue);
+ if (!list_empty(&q->queue))
+ next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
+ q->curr = buf;
+ DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n",
+ buf, q->queue.prev, q->queue.next);
+ buf->activate(dev,buf,next);
+ } else {
+ DEB_INT("no next buffer. stopping.\n");
+ if( 0 != vbi ) {
+ /* turn off video-dma3 */
+ saa7146_write(dev,MC1, MASK_20);
+ } else {
+ /* nothing to do -- just prevent next video-dma1 transfer
+ by lowering the protection address */
+
+ // fixme: fix this for vflip != 0
+
+ saa7146_write(dev, PROT_ADDR1, 0);
+ saa7146_write(dev, MC2, (MASK_02|MASK_18));
+
+ /* write the address of the rps-program */
+ saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
+ /* turn on rps */
+ saa7146_write(dev, MC1, (MASK_12 | MASK_28));
+
+/*
+ printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
+ printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
+ printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
+ printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
+ printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
+ printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
+*/
+ }
+ del_timer(&q->timeout);
+ }
+}
+
+void saa7146_buffer_timeout(unsigned long data)
+{
+ struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
+ struct saa7146_dev *dev = q->dev;
+ unsigned long flags;
+
+ DEB_EE("dev:%p, dmaq:%p\n", dev, q);
+
+ spin_lock_irqsave(&dev->slock,flags);
+ if (q->curr) {
+ DEB_D("timeout on %p\n", q->curr);
+ saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
+ }
+
+ /* we don't restart the transfer here like other drivers do. when
+ a streaming capture is disabled, the timeout function will be
+ called for the current buffer. if we activate the next buffer now,
+ we mess up our capture logic. if a timeout occurs on another buffer,
+ then something is seriously broken before, so no need to buffer the
+ next capture IMHO... */
+/*
+ saa7146_buffer_next(dev,q);
+*/
+ spin_unlock_irqrestore(&dev->slock,flags);
+}
+
+/********************************************************************************/
+/* file operations */
+
+static int fops_open(struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct saa7146_dev *dev = video_drvdata(file);
+ struct saa7146_fh *fh = NULL;
+ int result = 0;
+
+ DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev));
+
+ if (mutex_lock_interruptible(vdev->lock))
+ return -ERESTARTSYS;
+
+ DEB_D("using: %p\n", dev);
+
+ /* check if an extension is registered */
+ if( NULL == dev->ext ) {
+ DEB_S("no extension registered for this device\n");
+ result = -ENODEV;
+ goto out;
+ }
+
+ /* allocate per open data */
+ fh = kzalloc(sizeof(*fh),GFP_KERNEL);
+ if (NULL == fh) {
+ DEB_S("cannot allocate memory for per open data\n");
+ result = -ENOMEM;
+ goto out;
+ }
+
+ v4l2_fh_init(&fh->fh, vdev);
+
+ file->private_data = &fh->fh;
+ fh->dev = dev;
+
+ if (vdev->vfl_type == VFL_TYPE_VBI) {
+ DEB_S("initializing vbi...\n");
+ if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
+ result = saa7146_vbi_uops.open(dev,file);
+ if (dev->ext_vv_data->vbi_fops.open)
+ dev->ext_vv_data->vbi_fops.open(file);
+ } else {
+ DEB_S("initializing video...\n");
+ result = saa7146_video_uops.open(dev,file);
+ }
+
+ if (0 != result) {
+ goto out;
+ }
+
+ if( 0 == try_module_get(dev->ext->module)) {
+ result = -EINVAL;
+ goto out;
+ }
+
+ result = 0;
+ v4l2_fh_add(&fh->fh);
+out:
+ if (fh && result != 0) {
+ kfree(fh);
+ file->private_data = NULL;
+ }
+ mutex_unlock(vdev->lock);
+ return result;
+}
+
+static int fops_release(struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct saa7146_fh *fh = file->private_data;
+ struct saa7146_dev *dev = fh->dev;
+
+ DEB_EE("file:%p\n", file);
+
+ if (mutex_lock_interruptible(vdev->lock))
+ return -ERESTARTSYS;
+
+ if (vdev->vfl_type == VFL_TYPE_VBI) {
+ if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
+ saa7146_vbi_uops.release(dev,file);
+ if (dev->ext_vv_data->vbi_fops.release)
+ dev->ext_vv_data->vbi_fops.release(file);
+ } else {
+ saa7146_video_uops.release(dev,file);
+ }
+
+ v4l2_fh_del(&fh->fh);
+ v4l2_fh_exit(&fh->fh);
+ module_put(dev->ext->module);
+ file->private_data = NULL;
+ kfree(fh);
+
+ mutex_unlock(vdev->lock);
+
+ return 0;
+}
+
+static int fops_mmap(struct file *file, struct vm_area_struct * vma)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct saa7146_fh *fh = file->private_data;
+ struct videobuf_queue *q;
+ int res;
+
+ switch (vdev->vfl_type) {
+ case VFL_TYPE_GRABBER: {
+ DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",
+ file, vma);
+ q = &fh->video_q;
+ break;
+ }
+ case VFL_TYPE_VBI: {
+ DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",
+ file, vma);
+ if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
+ return -ENODEV;
+ q = &fh->vbi_q;
+ break;
+ }
+ default:
+ BUG();
+ return 0;
+ }
+
+ if (mutex_lock_interruptible(vdev->lock))
+ return -ERESTARTSYS;
+ res = videobuf_mmap_mapper(q, vma);
+ mutex_unlock(vdev->lock);
+ return res;
+}
+
+static unsigned int __fops_poll(struct file *file, struct poll_table_struct *wait)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct saa7146_fh *fh = file->private_data;
+ struct videobuf_buffer *buf = NULL;
+ struct videobuf_queue *q;
+ unsigned int res = v4l2_ctrl_poll(file, wait);
+
+ DEB_EE("file:%p, poll:%p\n", file, wait);
+
+ if (vdev->vfl_type == VFL_TYPE_VBI) {
+ if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
+ return res | POLLOUT | POLLWRNORM;
+ if( 0 == fh->vbi_q.streaming )
+ return res | videobuf_poll_stream(file, &fh->vbi_q, wait);
+ q = &fh->vbi_q;
+ } else {
+ DEB_D("using video queue\n");
+ q = &fh->video_q;
+ }
+
+ if (!list_empty(&q->stream))
+ buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
+
+ if (!buf) {
+ DEB_D("buf == NULL!\n");
+ return res | POLLERR;
+ }
+
+ poll_wait(file, &buf->done, wait);
+ if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
+ DEB_D("poll succeeded!\n");
+ return res | POLLIN | POLLRDNORM;
+ }
+
+ DEB_D("nothing to poll for, buf->state:%d\n", buf->state);
+ return res;
+}
+
+static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
+{
+ struct video_device *vdev = video_devdata(file);
+ unsigned int res;
+
+ mutex_lock(vdev->lock);
+ res = __fops_poll(file, wait);
+ mutex_unlock(vdev->lock);
+ return res;
+}
+
+static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct saa7146_fh *fh = file->private_data;
+ int ret;
+
+ switch (vdev->vfl_type) {
+ case VFL_TYPE_GRABBER:
+/*
+ DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun",
+ file, data, (unsigned long)count);
+*/
+ return saa7146_video_uops.read(file,data,count,ppos);
+ case VFL_TYPE_VBI:
+/*
+ DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n",
+ file, data, (unsigned long)count);
+*/
+ if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) {
+ if (mutex_lock_interruptible(vdev->lock))
+ return -ERESTARTSYS;
+ ret = saa7146_vbi_uops.read(file, data, count, ppos);
+ mutex_unlock(vdev->lock);
+ return ret;
+ }
+ return -EINVAL;
+ default:
+ BUG();
+ return 0;
+ }
+}
+
+static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct saa7146_fh *fh = file->private_data;
+ int ret;
+
+ switch (vdev->vfl_type) {
+ case VFL_TYPE_GRABBER:
+ return -EINVAL;
+ case VFL_TYPE_VBI:
+ if (fh->dev->ext_vv_data->vbi_fops.write) {
+ if (mutex_lock_interruptible(vdev->lock))
+ return -ERESTARTSYS;
+ ret = fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
+ mutex_unlock(vdev->lock);
+ return ret;
+ }
+ return -EINVAL;
+ default:
+ BUG();
+ return -EINVAL;
+ }
+}
+
+static const struct v4l2_file_operations video_fops =
+{
+ .owner = THIS_MODULE,
+ .open = fops_open,
+ .release = fops_release,
+ .read = fops_read,
+ .write = fops_write,
+ .poll = fops_poll,
+ .mmap = fops_mmap,
+ .unlocked_ioctl = video_ioctl2,
+};
+
+static void vv_callback(struct saa7146_dev *dev, unsigned long status)
+{
+ u32 isr = status;
+
+ DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);
+
+ if (0 != (isr & (MASK_27))) {
+ DEB_INT("irq: RPS0 (0x%08x)\n", isr);
+ saa7146_video_uops.irq_done(dev,isr);
+ }
+
+ if (0 != (isr & (MASK_28))) {
+ u32 mc2 = saa7146_read(dev, MC2);
+ if( 0 != (mc2 & MASK_15)) {
+ DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);
+ wake_up(&dev->vv_data->vbi_wq);
+ saa7146_write(dev,MC2, MASK_31);
+ return;
+ }
+ DEB_INT("irq: RPS1 (0x%08x)\n", isr);
+ saa7146_vbi_uops.irq_done(dev,isr);
+ }
+}
+
+static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
+ .s_ctrl = saa7146_s_ctrl,
+};
+
+int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
+{
+ struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler;
+ struct v4l2_pix_format *fmt;
+ struct v4l2_vbi_format *vbi;
+ struct saa7146_vv *vv;
+ int err;
+
+ err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
+ if (err)
+ return err;
+
+ v4l2_ctrl_handler_init(hdl, 6);
+ v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
+ V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
+ v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 127, 1, 64);
+ v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
+ V4L2_CID_SATURATION, 0, 127, 1, 64);
+ v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ if (hdl->error) {
+ err = hdl->error;
+ v4l2_ctrl_handler_free(hdl);
+ return err;
+ }
+ dev->v4l2_dev.ctrl_handler = hdl;
+
+ vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
+ if (vv == NULL) {
+ ERR("out of memory. aborting.\n");
+ v4l2_ctrl_handler_free(hdl);
+ return -ENOMEM;
+ }
+ ext_vv->vid_ops = saa7146_video_ioctl_ops;
+ ext_vv->vbi_ops = saa7146_vbi_ioctl_ops;
+ ext_vv->core_ops = &saa7146_video_ioctl_ops;
+
+ DEB_EE("dev:%p\n", dev);
+
+ /* set default values for video parts of the saa7146 */
+ saa7146_write(dev, BCS_CTRL, 0x80400040);
+
+ /* enable video-port pins */
+ saa7146_write(dev, MC1, (MASK_10 | MASK_26));
+
+ /* save per-device extension data (one extension can
+ handle different devices that might need different
+ configuration data) */
+ dev->ext_vv_data = ext_vv;
+
+ vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
+ if( NULL == vv->d_clipping.cpu_addr ) {
+ ERR("out of memory. aborting.\n");
+ kfree(vv);
+ v4l2_ctrl_handler_free(hdl);
+ return -1;
+ }
+ memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
+
+ saa7146_video_uops.init(dev,vv);
+ if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
+ saa7146_vbi_uops.init(dev,vv);
+
+ fmt = &vv->ov_fb.fmt;
+ fmt->width = vv->standard->h_max_out;
+ fmt->height = vv->standard->v_max_out;
+ fmt->pixelformat = V4L2_PIX_FMT_RGB565;
+ fmt->bytesperline = 2 * fmt->width;
+ fmt->sizeimage = fmt->bytesperline * fmt->height;
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+
+ fmt = &vv->video_fmt;
+ fmt->width = 384;
+ fmt->height = 288;
+ fmt->pixelformat = V4L2_PIX_FMT_BGR24;
+ fmt->field = V4L2_FIELD_ANY;
+ fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
+ fmt->bytesperline = 3 * fmt->width;
+ fmt->sizeimage = fmt->bytesperline * fmt->height;
+
+ vbi = &vv->vbi_fmt;
+ vbi->sampling_rate = 27000000;
+ vbi->offset = 248; /* todo */
+ vbi->samples_per_line = 720 * 2;
+ vbi->sample_format = V4L2_PIX_FMT_GREY;
+
+ /* fixme: this only works for PAL */
+ vbi->start[0] = 5;
+ vbi->count[0] = 16;
+ vbi->start[1] = 312;
+ vbi->count[1] = 16;
+
+ init_timer(&vv->vbi_read_timeout);
+
+ vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING;
+ vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY;
+ dev->vv_data = vv;
+ dev->vv_callback = &vv_callback;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_vv_init);
+
+int saa7146_vv_release(struct saa7146_dev* dev)
+{
+ struct saa7146_vv *vv = dev->vv_data;
+
+ DEB_EE("dev:%p\n", dev);
+
+ v4l2_device_unregister(&dev->v4l2_dev);
+ pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
+ v4l2_ctrl_handler_free(&dev->ctrl_handler);
+ kfree(vv);
+ dev->vv_data = NULL;
+ dev->vv_callback = NULL;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_vv_release);
+
+int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
+ char *name, int type)
+{
+ struct video_device *vfd;
+ int err;
+ int i;
+
+ DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
+
+ // released by vfd->release
+ vfd = video_device_alloc();
+ if (vfd == NULL)
+ return -ENOMEM;
+
+ vfd->fops = &video_fops;
+ if (type == VFL_TYPE_GRABBER)
+ vfd->ioctl_ops = &dev->ext_vv_data->vid_ops;
+ else
+ vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops;
+ vfd->release = video_device_release;
+ vfd->lock = &dev->v4l2_lock;
+ vfd->v4l2_dev = &dev->v4l2_dev;
+ vfd->tvnorms = 0;
+ set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
+ for (i = 0; i < dev->ext_vv_data->num_stds; i++)
+ vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
+ strlcpy(vfd->name, name, sizeof(vfd->name));
+ video_set_drvdata(vfd, dev);
+
+ err = video_register_device(vfd, type, -1);
+ if (err < 0) {
+ ERR("cannot register v4l2 device. skipping.\n");
+ video_device_release(vfd);
+ return err;
+ }
+
+ pr_info("%s: registered device %s [v4l2]\n",
+ dev->name, video_device_node_name(vfd));
+
+ *vid = vfd;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_register_device);
+
+int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
+{
+ DEB_EE("dev:%p\n", dev);
+
+ video_unregister_device(*vid);
+ *vid = NULL;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_unregister_device);
+
+static int __init saa7146_vv_init_module(void)
+{
+ return 0;
+}
+
+
+static void __exit saa7146_vv_cleanup_module(void)
+{
+}
+
+module_init(saa7146_vv_init_module);
+module_exit(saa7146_vv_cleanup_module);
+
+MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
+MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
+MODULE_LICENSE("GPL");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.