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3ae863e0db
Embed the video_device struct to simplify the error handling and in order to (eventually) get rid of video_device_alloc/release. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
649 lines
16 KiB
C
649 lines
16 KiB
C
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <media/saa7146_vv.h>
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#include <linux/module.h>
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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",
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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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if (vv->resources & bit) {
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DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n",
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vv->resources, bit);
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/* no, someone else uses it */
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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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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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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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}
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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(q, &buf->vb, 0, 0);
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videobuf_dma_unmap(q->dev, 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",
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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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v4l2_get_timestamp(&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",
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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 file *file)
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{
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struct video_device *vdev = video_devdata(file);
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struct saa7146_dev *dev = video_drvdata(file);
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struct saa7146_fh *fh = NULL;
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int result = 0;
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DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev));
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if (mutex_lock_interruptible(vdev->lock))
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return -ERESTARTSYS;
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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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v4l2_fh_init(&fh->fh, vdev);
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file->private_data = &fh->fh;
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fh->dev = dev;
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if (vdev->vfl_type == VFL_TYPE_VBI) {
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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(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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v4l2_fh_add(&fh->fh);
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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(vdev->lock);
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return result;
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}
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static int fops_release(struct file *file)
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{
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struct video_device *vdev = video_devdata(file);
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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("file:%p\n", file);
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mutex_lock(vdev->lock);
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if (vdev->vfl_type == VFL_TYPE_VBI) {
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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(file);
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} else {
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saa7146_video_uops.release(dev,file);
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}
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v4l2_fh_del(&fh->fh);
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v4l2_fh_exit(&fh->fh);
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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(vdev->lock);
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return 0;
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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 video_device *vdev = video_devdata(file);
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struct saa7146_fh *fh = file->private_data;
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struct videobuf_queue *q;
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int res;
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switch (vdev->vfl_type) {
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case VFL_TYPE_GRABBER: {
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DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",
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file, vma);
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q = &fh->video_q;
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break;
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}
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case VFL_TYPE_VBI: {
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DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",
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file, vma);
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if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
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return -ENODEV;
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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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}
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if (mutex_lock_interruptible(vdev->lock))
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return -ERESTARTSYS;
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res = videobuf_mmap_mapper(q, vma);
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mutex_unlock(vdev->lock);
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return res;
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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 video_device *vdev = video_devdata(file);
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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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unsigned int res = v4l2_ctrl_poll(file, wait);
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DEB_EE("file:%p, poll:%p\n", file, wait);
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if (vdev->vfl_type == VFL_TYPE_VBI) {
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if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
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return res | POLLOUT | POLLWRNORM;
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if( 0 == fh->vbi_q.streaming )
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return res | 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 res | 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 res | 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 res;
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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 video_device *vdev = video_devdata(file);
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unsigned int res;
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mutex_lock(vdev->lock);
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res = __fops_poll(file, wait);
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mutex_unlock(vdev->lock);
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return res;
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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 video_device *vdev = video_devdata(file);
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struct saa7146_fh *fh = file->private_data;
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int ret;
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switch (vdev->vfl_type) {
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case VFL_TYPE_GRABBER:
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/*
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DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun",
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file, data, (unsigned long)count);
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*/
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return saa7146_video_uops.read(file,data,count,ppos);
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case VFL_TYPE_VBI:
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/*
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DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n",
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file, data, (unsigned long)count);
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*/
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if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) {
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if (mutex_lock_interruptible(vdev->lock))
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return -ERESTARTSYS;
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ret = saa7146_vbi_uops.read(file, data, count, ppos);
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mutex_unlock(vdev->lock);
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return ret;
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}
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return -EINVAL;
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default:
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BUG();
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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 video_device *vdev = video_devdata(file);
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struct saa7146_fh *fh = file->private_data;
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int ret;
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switch (vdev->vfl_type) {
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case VFL_TYPE_GRABBER:
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return -EINVAL;
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case VFL_TYPE_VBI:
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if (fh->dev->ext_vv_data->vbi_fops.write) {
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if (mutex_lock_interruptible(vdev->lock))
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return -ERESTARTSYS;
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ret = fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
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mutex_unlock(vdev->lock);
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return ret;
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}
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return -EINVAL;
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default:
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BUG();
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}
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}
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static const struct v4l2_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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.unlocked_ioctl = video_ioctl2,
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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 const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
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.s_ctrl = saa7146_s_ctrl,
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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 v4l2_ctrl_handler *hdl = &dev->ctrl_handler;
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struct v4l2_pix_format *fmt;
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struct v4l2_vbi_format *vbi;
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struct saa7146_vv *vv;
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int err;
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err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
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if (err)
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return err;
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v4l2_ctrl_handler_init(hdl, 6);
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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_zalloc_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;
|
|
}
|
|
|
|
saa7146_video_uops.init(dev,vv);
|
|
if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
|
|
saa7146_vbi_uops.init(dev,vv);
|
|
|
|
vv->ov_fb.fmt.width = vv->standard->h_max_out;
|
|
vv->ov_fb.fmt.height = vv->standard->v_max_out;
|
|
vv->ov_fb.fmt.pixelformat = V4L2_PIX_FMT_RGB565;
|
|
vv->ov_fb.fmt.bytesperline = 2 * vv->ov_fb.fmt.width;
|
|
vv->ov_fb.fmt.sizeimage = vv->ov_fb.fmt.bytesperline * vv->ov_fb.fmt.height;
|
|
vv->ov_fb.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 *vfd, struct saa7146_dev *dev,
|
|
char *name, int type)
|
|
{
|
|
int err;
|
|
int i;
|
|
|
|
DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
|
|
|
|
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_empty;
|
|
vfd->lock = &dev->v4l2_lock;
|
|
vfd->v4l2_dev = &dev->v4l2_dev;
|
|
vfd->tvnorms = 0;
|
|
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");
|
|
return err;
|
|
}
|
|
|
|
pr_info("%s: registered device %s [v4l2]\n",
|
|
dev->name, video_device_node_name(vfd));
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(saa7146_register_device);
|
|
|
|
int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev)
|
|
{
|
|
DEB_EE("dev:%p\n", dev);
|
|
|
|
video_unregister_device(vfd);
|
|
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");
|