cx23885-video.c

trident tm5600的linux驱动

	unsigned int height, enum v4l2_field field)
{
	dprintk(1, "%s()\n", __func__);
	return 0;
}

static int cx23885_start_video_dma(struct cx23885_dev *dev,
			   struct cx23885_dmaqueue *q,
			   struct cx23885_buffer *buf)
{
	dprintk(1, "%s()\n", __func__);

	/* setup fifo + format */
	cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH01],
				buf->bpl, buf->risc.dma);
	cx23885_set_scale(dev, buf->vb.width, buf->vb.height, buf->vb.field);

	/* reset counter */
	cx_write(VID_A_GPCNT_CTL, 3);
	q->count = 1;

	/* enable irq */
	cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | 0x01);
	cx_set(VID_A_INT_MSK, 0x000011);

	/* start dma */
	cx_set(DEV_CNTRL2, (1<<5));
	cx_set(VID_A_DMA_CTL, 0x11); /* FIFO and RISC enable */

	return 0;
}

#if 0
#ifdef CONFIG_PM
static int cx23885_stop_video_dma(struct cx23885_dev *dev)
{
	dprintk(1, "%s()\n", __func__);
	/* stop dma */
	cx_clear(VID_A_DMA_CTL, 0x11);

	/* disable irqs */
	cx_clear(PCI_INT_MSK, 0x000001);
	cx_clear(VID_A_INT_MSK, 0x000011);

	return 0;
}
#endif
#endif

static int cx23885_restart_video_queue(struct cx23885_dev *dev,
			       struct cx23885_dmaqueue *q)
{
	struct cx23885_buffer *buf, *prev;
	struct list_head *item;
	dprintk(1, "%s()\n", __func__);

	if (!list_empty(&q->active)) {
		buf = list_entry(q->active.next, struct cx23885_buffer,
			vb.queue);
		dprintk(2, "restart_queue [%p/%d]: restart dma\n",
			buf, buf->vb.i);
		cx23885_start_video_dma(dev, q, buf);
		list_for_each(item, &q->active) {
			buf = list_entry(item, struct cx23885_buffer,
				vb.queue);
			buf->count    = q->count++;
		}
		mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
		return 0;
	}

	prev = NULL;
	for (;;) {
		if (list_empty(&q->queued))
			return 0;
		buf = list_entry(q->queued.next, struct cx23885_buffer,
			vb.queue);
		if (NULL == prev) {
			list_move_tail(&buf->vb.queue, &q->active);
			cx23885_start_video_dma(dev, q, buf);
			buf->vb.state = VIDEOBUF_ACTIVE;
			buf->count    = q->count++;
			mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
			dprintk(2, "[%p/%d] restart_queue - first active\n",
				buf, buf->vb.i);

		} else if (prev->vb.width  == buf->vb.width  &&
			   prev->vb.height == buf->vb.height &&
			   prev->fmt       == buf->fmt) {
			list_move_tail(&buf->vb.queue, &q->active);
			buf->vb.state = VIDEOBUF_ACTIVE;
			buf->count    = q->count++;
			prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
			prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63 - 32 */
			dprintk(2, "[%p/%d] restart_queue - move to active\n",
				buf, buf->vb.i);
		} else {
			return 0;
		}
		prev = buf;
	}
}

static int buffer_setup(struct videobuf_queue *q, unsigned int *count,
	unsigned int *size)
{
	struct cx23885_fh *fh = q->priv_data;

	*size = fh->fmt->depth*fh->width*fh->height >> 3;
	if (0 == *count)
		*count = 32;
	while (*size * *count > vid_limit * 1024 * 1024)
		(*count)--;
	return 0;
}

static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
	       enum v4l2_field field)
{
	struct cx23885_fh *fh  = q->priv_data;
	struct cx23885_dev *dev = fh->dev;
	struct cx23885_buffer *buf =
		container_of(vb, struct cx23885_buffer, vb);
	int rc, init_buffer = 0;
	u32 line0_offset, line1_offset;
	struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);

	BUG_ON(NULL == fh->fmt);
	if (fh->width  < 48 || fh->width  > norm_maxw(dev->tvnorm) ||
	    fh->height < 32 || fh->height > norm_maxh(dev->tvnorm))
		return -EINVAL;
	buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
	if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
		return -EINVAL;

	if (buf->fmt       != fh->fmt    ||
	    buf->vb.width  != fh->width  ||
	    buf->vb.height != fh->height ||
	    buf->vb.field  != field) {
		buf->fmt       = fh->fmt;
		buf->vb.width  = fh->width;
		buf->vb.height = fh->height;
		buf->vb.field  = field;
		init_buffer = 1;
	}

	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
		init_buffer = 1;
		rc = videobuf_iolock(q, &buf->vb, NULL);
		if (0 != rc)
			goto fail;
	}

	if (init_buffer) {
		buf->bpl = buf->vb.width * buf->fmt->depth >> 3;
		switch (buf->vb.field) {
		case V4L2_FIELD_TOP:
			cx23885_risc_buffer(dev->pci, &buf->risc,
					 dma->sglist, 0, UNSET,
					 buf->bpl, 0, buf->vb.height);
			break;
		case V4L2_FIELD_BOTTOM:
			cx23885_risc_buffer(dev->pci, &buf->risc,
					 dma->sglist, UNSET, 0,
					 buf->bpl, 0, buf->vb.height);
			break;
		case V4L2_FIELD_INTERLACED:
			if (dev->tvnorm & V4L2_STD_NTSC) {
				/* cx25840 transmits NTSC bottom field first */
				dprintk(1, "%s() Creating NTSC risc\n",
					__func__);
				line0_offset = buf->bpl;
				line1_offset = 0;
			} else {
				/* All other formats are top field first */
				dprintk(1, "%s() Creating PAL/SECAM risc\n",
					__func__);
				line0_offset = 0;
				line1_offset = buf->bpl;
			}
			cx23885_risc_buffer(dev->pci, &buf->risc,
					dma->sglist, line0_offset,
					line1_offset,
					buf->bpl, buf->bpl,
					buf->vb.height >> 1);
			break;
		case V4L2_FIELD_SEQ_TB:
			cx23885_risc_buffer(dev->pci, &buf->risc,
					 dma->sglist,
					 0, buf->bpl * (buf->vb.height >> 1),
					 buf->bpl, 0,
					 buf->vb.height >> 1);
			break;
		case V4L2_FIELD_SEQ_BT:
			cx23885_risc_buffer(dev->pci, &buf->risc,
					 dma->sglist,
					 buf->bpl * (buf->vb.height >> 1), 0,
					 buf->bpl, 0,
					 buf->vb.height >> 1);
			break;
		default:
			BUG();
		}
	}
	dprintk(2, "[%p/%d] buffer_prep - %dx%d %dbpp \"%s\" - dma=0x%08lx\n",
		buf, buf->vb.i,
		fh->width, fh->height, fh->fmt->depth, fh->fmt->name,
		(unsigned long)buf->risc.dma);

	buf->vb.state = VIDEOBUF_PREPARED;
	return 0;

 fail:
	cx23885_free_buffer(q, buf);
	return rc;
}

static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
	struct cx23885_buffer   *buf = container_of(vb,
		struct cx23885_buffer, vb);
	struct cx23885_buffer   *prev;
	struct cx23885_fh       *fh   = vq->priv_data;
	struct cx23885_dev      *dev  = fh->dev;
	struct cx23885_dmaqueue *q    = &dev->vidq;

	/* add jump to stopper */
	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
	buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
	buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */

	if (!list_empty(&q->queued)) {
		list_add_tail(&buf->vb.queue, &q->queued);
		buf->vb.state = VIDEOBUF_QUEUED;
		dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
			buf, buf->vb.i);

	} else if (list_empty(&q->active)) {
		list_add_tail(&buf->vb.queue, &q->active);
		cx23885_start_video_dma(dev, q, buf);
		buf->vb.state = VIDEOBUF_ACTIVE;
		buf->count    = q->count++;
		mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
		dprintk(2, "[%p/%d] buffer_queue - first active\n",
			buf, buf->vb.i);

	} else {
		prev = list_entry(q->active.prev, struct cx23885_buffer,
			vb.queue);
		if (prev->vb.width  == buf->vb.width  &&
		    prev->vb.height == buf->vb.height &&
		    prev->fmt       == buf->fmt) {
			list_add_tail(&buf->vb.queue, &q->active);
			buf->vb.state = VIDEOBUF_ACTIVE;
			buf->count    = q->count++;
			prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
			/* 64 bit bits 63-32 */
			prev->risc.jmp[2] = cpu_to_le32(0);
			dprintk(2, "[%p/%d] buffer_queue - append to active\n",
				buf, buf->vb.i);

		} else {
			list_add_tail(&buf->vb.queue, &q->queued);
			buf->vb.state = VIDEOBUF_QUEUED;
			dprintk(2, "[%p/%d] buffer_queue - first queued\n",
				buf, buf->vb.i);
		}
	}
}

static void buffer_release(struct videobuf_queue *q,
	struct videobuf_buffer *vb)
{
	struct cx23885_buffer *buf = container_of(vb,
		struct cx23885_buffer, vb);

	cx23885_free_buffer(q, buf);
}

static struct videobuf_queue_ops cx23885_video_qops = {
	.buf_setup    = buffer_setup,
	.buf_prepare  = buffer_prepare,
	.buf_queue    = buffer_queue,
	.buf_release  = buffer_release,
};

static struct videobuf_queue *get_queue(struct cx23885_fh *fh)
{
	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		return &fh->vidq;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		return &fh->vbiq;
	default:
		BUG();
		return NULL;
	}
}

static int get_resource(struct cx23885_fh *fh)
{
	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		return RESOURCE_VIDEO;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		return RESOURCE_VBI;
	default:
		BUG();
		return 0;
	}
}

static int video_open(struct inode *inode, struct file *file)
{
	int minor = iminor(inode);
	struct cx23885_dev *h, *dev = NULL;
	struct cx23885_fh *fh;
	struct list_head *list;
	enum v4l2_buf_type type = 0;
	int radio = 0;

	lock_kernel();
	list_for_each(list, &cx23885_devlist) {
		h = list_entry(list, struct cx23885_dev, devlist);
		if (h->video_dev->minor == minor) {
			dev  = h;
			type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		}
		if (h->vbi_dev &&
		   h->vbi_dev->minor == minor) {
			dev  = h;
			type = V4L2_BUF_TYPE_VBI_CAPTURE;
		}
		if (h->radio_dev &&
		    h->radio_dev->minor == minor) {
			radio = 1;
			dev   = h;
		}
	}
	if (NULL == dev) {
		unlock_kernel();
		return -ENODEV;
	}

	dprintk(1, "open minor=%d radio=%d type=%s\n",
		minor, radio, v4l2_type_names[type]);

	/* allocate + initialize per filehandle data */
	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
	if (NULL == fh) {
		unlock_kernel();
		return -ENOMEM;
	}
	file->private_data = fh;
	fh->dev      = dev;
	fh->radio    = radio;
	fh->type     = type;
	fh->width    = 320;
	fh->height   = 240;
	fh->fmt      = format_by_fourcc(V4L2_PIX_FMT_BGR24);

	videobuf_queue_sg_init(&fh->vidq, &cx23885_video_qops,
			    &dev->pci->dev, &dev->slock,
			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
			    V4L2_FIELD_INTERLACED,
			    sizeof(struct cx23885_buffer),
			    fh);

	dprintk(1, "post videobuf_queue_init()\n");

#if 0
	if (fh->radio) {
		int board = dev->board;
		dprintk(1, "video_open: setting radio device\n");
		cx_write(MO_GP3_IO, cx88_boards[board].radio.gpio3);
		cx_write(MO_GP0_IO, cx88_boards[board].radio.gpio0);
		cx_write(MO_GP1_IO, cx88_boards[board].radio.gpio1);
		cx_write(MO_GP2_IO, cx88_boards[board].radio.gpio2);
		dev->tvaudio = WW_FM;
		cx23885_set_tvaudio(dev);
		cx23885_set_stereo(dev, V4L2_TUNER_MODE_STEREO, 1);
		cx23885_call_i2c_clients(&dev->i2c_bus[1],
			AUDC_SET_RADIO, NULL);
	}
#endif
	unlock_kernel();

	return 0;
}

static ssize_t video_read(struct file *file, char __user *data,
	size_t count, loff_t *ppos)
{
	struct cx23885_fh *fh = file->private_data;

	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (res_locked(fh->dev, RESOURCE_VIDEO))
			return -EBUSY;
		return videobuf_read_one(&fh->vidq, data, count, ppos,
					 file->f_flags & O_NONBLOCK);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (!res_get(fh->dev, fh, RESOURCE_VBI))
			return -EBUSY;
		return videobuf_read_stream(&fh->vbiq, data, count, ppos, 1,
					    file->f_flags & O_NONBLOCK);
	default:
		BUG();
		return 0;
	}
}

static unsigned int video_poll(struct file *file,
	struct poll_table_struct *wait)
{
	struct cx23885_fh *fh = file->private_data;
	struct cx23885_buffer *buf;

	if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
		if (!res_get(fh->dev, fh, RESOURCE_VBI))
			return POLLERR;
		return videobuf_poll_stream(file, &fh->vbiq, wait);
	}

	if (res_check(fh, RESOURCE_VIDEO)) {
		/* streaming capture */
		if (list_empty(&fh->vidq.stream))
			return POLLERR;
		buf = list_entry(fh->vidq.stream.next,
			struct cx23885_buffer, vb.stream);
	} else {
		/* read() capture */
		buf = (struct cx23885_buffer *)fh->vidq.read_buf;
		if (NULL == buf)
			return POLLERR;
	}
	poll_wait(file, &buf->vb.done, wait);
	if (buf->vb.state == VIDEOBUF_DONE ||
	    buf->vb.state == VIDEOBUF_ERROR)
		return POLLIN|POLLRDNORM;
	return 0;
}

static int video_release(struct inode *inode, struct file *file)
{
	struct cx23885_fh *fh = file->private_data;
	struct cx23885_dev *dev = fh->dev;

	/* turn off overlay */
	if (res_check(fh, RESOURCE_OVERLAY)) {
		/* FIXME */
		res_free(dev, fh, RESOURCE_OVERLAY);
	}

	/* stop video capture */
	if (res_check(fh, RESOURCE_VIDEO)) {
		videobuf_queue_cancel(&fh->vidq);
		res_free(dev, fh, RESOURCE_VIDEO);
	}
	if (fh->vidq.read_buf) {
		buffer_release(&fh->vidq, fh->vidq.read_buf);
		kfree(fh->vidq.read_buf);
	}