595 строки
15 KiB
C
595 строки
15 KiB
C
#include <media/saa7146_vv.h>
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#define BOARD_CAN_DO_VBI(dev) (dev->revision != 0 && dev->vv_data->vbi_minor != -1)
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/****************************************************************************/
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/* resource management functions, shamelessly stolen from saa7134 driver */
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int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
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{
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struct saa7146_dev *dev = fh->dev;
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struct saa7146_vv *vv = dev->vv_data;
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if (fh->resources & bit) {
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DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
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/* have it already allocated */
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return 1;
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}
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/* is it free? */
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mutex_lock(&dev->lock);
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if (vv->resources & bit) {
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DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
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/* no, someone else uses it */
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mutex_unlock(&dev->lock);
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return 0;
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}
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/* it's free, grab it */
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fh->resources |= bit;
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vv->resources |= bit;
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DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
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mutex_unlock(&dev->lock);
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return 1;
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}
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void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
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{
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struct saa7146_dev *dev = fh->dev;
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struct saa7146_vv *vv = dev->vv_data;
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BUG_ON((fh->resources & bits) != bits);
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mutex_lock(&dev->lock);
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fh->resources &= ~bits;
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vv->resources &= ~bits;
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DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
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mutex_unlock(&dev->lock);
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}
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/********************************************************************************/
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/* common dma functions */
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void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
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struct saa7146_buf *buf)
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{
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struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
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DEB_EE(("dev:%p, buf:%p\n",dev,buf));
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BUG_ON(in_interrupt());
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videobuf_waiton(&buf->vb,0,0);
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videobuf_dma_unmap(q, dma);
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videobuf_dma_free(dma);
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buf->vb.state = VIDEOBUF_NEEDS_INIT;
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}
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/********************************************************************************/
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/* common buffer functions */
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int saa7146_buffer_queue(struct saa7146_dev *dev,
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struct saa7146_dmaqueue *q,
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struct saa7146_buf *buf)
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{
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assert_spin_locked(&dev->slock);
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DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
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BUG_ON(!q);
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if (NULL == q->curr) {
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q->curr = buf;
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DEB_D(("immediately activating buffer %p\n", buf));
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buf->activate(dev,buf,NULL);
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} else {
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list_add_tail(&buf->vb.queue,&q->queue);
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buf->vb.state = VIDEOBUF_QUEUED;
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DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
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}
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return 0;
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}
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void saa7146_buffer_finish(struct saa7146_dev *dev,
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struct saa7146_dmaqueue *q,
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int state)
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{
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assert_spin_locked(&dev->slock);
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DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
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DEB_EE(("q->curr:%p\n",q->curr));
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BUG_ON(!q->curr);
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/* finish current buffer */
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if (NULL == q->curr) {
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DEB_D(("aiii. no current buffer\n"));
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return;
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}
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q->curr->vb.state = state;
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do_gettimeofday(&q->curr->vb.ts);
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wake_up(&q->curr->vb.done);
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q->curr = NULL;
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}
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void saa7146_buffer_next(struct saa7146_dev *dev,
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struct saa7146_dmaqueue *q, int vbi)
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{
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struct saa7146_buf *buf,*next = NULL;
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BUG_ON(!q);
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DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
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assert_spin_locked(&dev->slock);
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if (!list_empty(&q->queue)) {
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/* activate next one from queue */
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buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
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list_del(&buf->vb.queue);
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if (!list_empty(&q->queue))
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next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
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q->curr = buf;
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DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
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buf->activate(dev,buf,next);
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} else {
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DEB_INT(("no next buffer. stopping.\n"));
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if( 0 != vbi ) {
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/* turn off video-dma3 */
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saa7146_write(dev,MC1, MASK_20);
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} else {
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/* nothing to do -- just prevent next video-dma1 transfer
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by lowering the protection address */
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// fixme: fix this for vflip != 0
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saa7146_write(dev, PROT_ADDR1, 0);
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saa7146_write(dev, MC2, (MASK_02|MASK_18));
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/* write the address of the rps-program */
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saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
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/* turn on rps */
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saa7146_write(dev, MC1, (MASK_12 | MASK_28));
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/*
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printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
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printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
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printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
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printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
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printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
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printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
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*/
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}
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del_timer(&q->timeout);
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}
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}
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void saa7146_buffer_timeout(unsigned long data)
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{
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struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
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struct saa7146_dev *dev = q->dev;
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unsigned long flags;
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DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
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spin_lock_irqsave(&dev->slock,flags);
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if (q->curr) {
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DEB_D(("timeout on %p\n", q->curr));
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saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
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}
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/* we don't restart the transfer here like other drivers do. when
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a streaming capture is disabled, the timeout function will be
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called for the current buffer. if we activate the next buffer now,
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we mess up our capture logic. if a timeout occurs on another buffer,
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then something is seriously broken before, so no need to buffer the
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next capture IMHO... */
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/*
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saa7146_buffer_next(dev,q);
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*/
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spin_unlock_irqrestore(&dev->slock,flags);
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}
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/********************************************************************************/
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/* file operations */
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static int fops_open(struct inode *inode, struct file *file)
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{
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unsigned int minor = iminor(inode);
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struct saa7146_dev *h = NULL, *dev = NULL;
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struct list_head *list;
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struct saa7146_fh *fh = NULL;
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int result = 0;
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enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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DEB_EE(("inode:%p, file:%p, minor:%d\n",inode,file,minor));
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if (mutex_lock_interruptible(&saa7146_devices_lock))
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return -ERESTARTSYS;
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list_for_each(list,&saa7146_devices) {
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h = list_entry(list, struct saa7146_dev, item);
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if( NULL == h->vv_data ) {
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DEB_D(("device %p has not registered video devices.\n",h));
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continue;
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}
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DEB_D(("trying: %p @ major %d,%d\n",h,h->vv_data->video_minor,h->vv_data->vbi_minor));
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if (h->vv_data->video_minor == minor) {
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dev = h;
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}
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if (h->vv_data->vbi_minor == minor) {
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type = V4L2_BUF_TYPE_VBI_CAPTURE;
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dev = h;
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}
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}
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if (NULL == dev) {
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DEB_S(("no such video device.\n"));
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result = -ENODEV;
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goto out;
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}
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DEB_D(("using: %p\n",dev));
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/* check if an extension is registered */
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if( NULL == dev->ext ) {
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DEB_S(("no extension registered for this device.\n"));
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result = -ENODEV;
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goto out;
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}
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/* allocate per open data */
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fh = kzalloc(sizeof(*fh),GFP_KERNEL);
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if (NULL == fh) {
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DEB_S(("cannot allocate memory for per open data.\n"));
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result = -ENOMEM;
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goto out;
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}
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file->private_data = fh;
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fh->dev = dev;
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fh->type = type;
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if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
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DEB_S(("initializing vbi...\n"));
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if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
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result = saa7146_vbi_uops.open(dev,file);
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if (dev->ext_vv_data->vbi_fops.open)
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dev->ext_vv_data->vbi_fops.open(inode, file);
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} else {
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DEB_S(("initializing video...\n"));
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result = saa7146_video_uops.open(dev,file);
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}
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if (0 != result) {
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goto out;
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}
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if( 0 == try_module_get(dev->ext->module)) {
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result = -EINVAL;
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goto out;
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}
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result = 0;
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out:
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if (fh && result != 0) {
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kfree(fh);
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file->private_data = NULL;
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}
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mutex_unlock(&saa7146_devices_lock);
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return result;
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}
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static int fops_release(struct inode *inode, struct file *file)
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{
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struct saa7146_fh *fh = file->private_data;
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struct saa7146_dev *dev = fh->dev;
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DEB_EE(("inode:%p, file:%p\n",inode,file));
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if (mutex_lock_interruptible(&saa7146_devices_lock))
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return -ERESTARTSYS;
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if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
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if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
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saa7146_vbi_uops.release(dev,file);
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if (dev->ext_vv_data->vbi_fops.release)
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dev->ext_vv_data->vbi_fops.release(inode, file);
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} else {
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saa7146_video_uops.release(dev,file);
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}
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module_put(dev->ext->module);
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file->private_data = NULL;
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kfree(fh);
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mutex_unlock(&saa7146_devices_lock);
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return 0;
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}
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static int fops_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
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{
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/*
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DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg));
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*/
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return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl);
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}
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static int fops_mmap(struct file *file, struct vm_area_struct * vma)
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{
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struct saa7146_fh *fh = file->private_data;
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struct videobuf_queue *q;
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switch (fh->type) {
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case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
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DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
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q = &fh->video_q;
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break;
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}
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case V4L2_BUF_TYPE_VBI_CAPTURE: {
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DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
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q = &fh->vbi_q;
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break;
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}
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default:
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BUG();
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return 0;
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}
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return videobuf_mmap_mapper(q,vma);
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}
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static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
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{
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struct saa7146_fh *fh = file->private_data;
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struct videobuf_buffer *buf = NULL;
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struct videobuf_queue *q;
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DEB_EE(("file:%p, poll:%p\n",file, wait));
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if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
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if( 0 == fh->vbi_q.streaming )
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return videobuf_poll_stream(file, &fh->vbi_q, wait);
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q = &fh->vbi_q;
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} else {
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DEB_D(("using video queue.\n"));
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q = &fh->video_q;
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}
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if (!list_empty(&q->stream))
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buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
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if (!buf) {
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DEB_D(("buf == NULL!\n"));
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return POLLERR;
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}
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poll_wait(file, &buf->done, wait);
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if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
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DEB_D(("poll succeeded!\n"));
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return POLLIN|POLLRDNORM;
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}
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DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
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return 0;
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}
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static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
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{
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struct saa7146_fh *fh = file->private_data;
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switch (fh->type) {
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case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
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// DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
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return saa7146_video_uops.read(file,data,count,ppos);
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}
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case V4L2_BUF_TYPE_VBI_CAPTURE: {
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// DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
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if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
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return saa7146_vbi_uops.read(file,data,count,ppos);
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else
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return -EINVAL;
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}
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break;
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default:
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BUG();
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return 0;
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}
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}
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static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
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{
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struct saa7146_fh *fh = file->private_data;
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switch (fh->type) {
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case V4L2_BUF_TYPE_VIDEO_CAPTURE:
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return -EINVAL;
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case V4L2_BUF_TYPE_VBI_CAPTURE:
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if (fh->dev->ext_vv_data->vbi_fops.write)
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return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
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else
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return -EINVAL;
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default:
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BUG();
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return -EINVAL;
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}
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}
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static const struct file_operations video_fops =
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{
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.owner = THIS_MODULE,
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.open = fops_open,
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.release = fops_release,
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.read = fops_read,
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.write = fops_write,
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.poll = fops_poll,
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.mmap = fops_mmap,
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.ioctl = fops_ioctl,
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.llseek = no_llseek,
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};
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static void vv_callback(struct saa7146_dev *dev, unsigned long status)
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{
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u32 isr = status;
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DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
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if (0 != (isr & (MASK_27))) {
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DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
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saa7146_video_uops.irq_done(dev,isr);
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}
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if (0 != (isr & (MASK_28))) {
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u32 mc2 = saa7146_read(dev, MC2);
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if( 0 != (mc2 & MASK_15)) {
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DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
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wake_up(&dev->vv_data->vbi_wq);
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saa7146_write(dev,MC2, MASK_31);
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return;
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}
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DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
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saa7146_vbi_uops.irq_done(dev,isr);
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}
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}
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static struct video_device device_template =
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{
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.fops = &video_fops,
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.minor = -1,
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};
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int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
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{
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struct saa7146_vv *vv = kzalloc (sizeof(struct saa7146_vv),GFP_KERNEL);
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if( NULL == vv ) {
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ERR(("out of memory. aborting.\n"));
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return -1;
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}
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DEB_EE(("dev:%p\n",dev));
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/* set default values for video parts of the saa7146 */
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saa7146_write(dev, BCS_CTRL, 0x80400040);
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/* enable video-port pins */
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saa7146_write(dev, MC1, (MASK_10 | MASK_26));
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/* save per-device extension data (one extension can
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handle different devices that might need different
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configuration data) */
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dev->ext_vv_data = ext_vv;
|
|
|
|
vv->video_minor = -1;
|
|
vv->vbi_minor = -1;
|
|
|
|
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);
|
|
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);
|
|
|
|
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));
|
|
|
|
pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
|
|
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 saa7146_vv *vv = dev->vv_data;
|
|
struct video_device *vfd;
|
|
|
|
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;
|
|
|
|
memcpy(vfd, &device_template, sizeof(struct video_device));
|
|
strlcpy(vfd->name, name, sizeof(vfd->name));
|
|
vfd->release = video_device_release;
|
|
video_set_drvdata(vfd, dev);
|
|
|
|
// fixme: -1 should be an insmod parameter *for the extension* (like "video_nr");
|
|
if (video_register_device(vfd, type, -1) < 0) {
|
|
ERR(("cannot register v4l2 device. skipping.\n"));
|
|
video_device_release(vfd);
|
|
return -1;
|
|
}
|
|
|
|
if( VFL_TYPE_GRABBER == type ) {
|
|
vv->video_minor = vfd->minor;
|
|
INFO(("%s: registered device video%d [v4l2]\n",
|
|
dev->name, vfd->minor & 0x1f));
|
|
} else {
|
|
vv->vbi_minor = vfd->minor;
|
|
INFO(("%s: registered device vbi%d [v4l2]\n",
|
|
dev->name, vfd->minor & 0x1f));
|
|
}
|
|
|
|
*vid = vfd;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(saa7146_register_device);
|
|
|
|
int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
|
|
{
|
|
struct saa7146_vv *vv = dev->vv_data;
|
|
|
|
DEB_EE(("dev:%p\n",dev));
|
|
|
|
if ((*vid)->vfl_type == VFL_TYPE_GRABBER) {
|
|
vv->video_minor = -1;
|
|
} else {
|
|
vv->vbi_minor = -1;
|
|
}
|
|
|
|
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");
|