saa7134-video.c

trident tm5600的linux驱动

	saa7134_set_dmabits(dev);
	mod_timer(&dev->video_q.timeout, jiffies+BUFFER_TIMEOUT);
	return 0;
}

static int buffer_prepare(struct videobuf_queue *q,
			  struct videobuf_buffer *vb,
			  enum v4l2_field field)
{
	struct saa7134_fh *fh = q->priv_data;
	struct saa7134_dev *dev = fh->dev;
	struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
	unsigned int size;
	int err;

	/* sanity checks */
	if (NULL == fh->fmt)
		return -EINVAL;
	if (fh->width    < 48 ||
	    fh->height   < 32 ||
	    fh->width/4  > dev->crop_current.width  ||
	    fh->height/4 > dev->crop_current.height ||
	    fh->width    > dev->crop_bounds.width  ||
	    fh->height   > dev->crop_bounds.height)
		return -EINVAL;
	size = (fh->width * fh->height * fh->fmt->depth) >> 3;
	if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
		return -EINVAL;

	dprintk("buffer_prepare [%d,size=%dx%d,bytes=%d,fields=%s,%s]\n",
		vb->i,fh->width,fh->height,size,v4l2_field_names[field],
		fh->fmt->name);
	if (buf->vb.width  != fh->width  ||
	    buf->vb.height != fh->height ||
	    buf->vb.size   != size       ||
	    buf->vb.field  != field      ||
	    buf->fmt       != fh->fmt) {
		saa7134_dma_free(q,buf);
	}

	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
		struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);

		buf->vb.width  = fh->width;
		buf->vb.height = fh->height;
		buf->vb.size   = size;
		buf->vb.field  = field;
		buf->fmt       = fh->fmt;
		buf->pt        = &fh->pt_cap;

		err = videobuf_iolock(q,&buf->vb,&dev->ovbuf);
		if (err)
			goto oops;
		err = saa7134_pgtable_build(dev->pci,buf->pt,
					    dma->sglist,
					    dma->sglen,
					    saa7134_buffer_startpage(buf));
		if (err)
			goto oops;
	}
	buf->vb.state = VIDEOBUF_PREPARED;
	buf->activate = buffer_activate;
	return 0;

 oops:
	saa7134_dma_free(q,buf);
	return err;
}

static int
buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
{
	struct saa7134_fh *fh = q->priv_data;

	*size = fh->fmt->depth * fh->width * fh->height >> 3;
	if (0 == *count)
		*count = gbuffers;
	*count = saa7134_buffer_count(*size,*count);
	return 0;
}

static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
	struct saa7134_fh *fh = q->priv_data;
	struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);

	saa7134_buffer_queue(fh->dev,&fh->dev->video_q,buf);
}

static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
	struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);

	saa7134_dma_free(q,buf);
}

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

/* ------------------------------------------------------------------ */

int saa7134_g_ctrl_internal(struct saa7134_dev *dev, struct saa7134_fh *fh, struct v4l2_control *c)
{
	const struct v4l2_queryctrl* ctrl;

	ctrl = ctrl_by_id(c->id);
	if (NULL == ctrl)
		return -EINVAL;
	switch (c->id) {
	case V4L2_CID_BRIGHTNESS:
		c->value = dev->ctl_bright;
		break;
	case V4L2_CID_HUE:
		c->value = dev->ctl_hue;
		break;
	case V4L2_CID_CONTRAST:
		c->value = dev->ctl_contrast;
		break;
	case V4L2_CID_SATURATION:
		c->value = dev->ctl_saturation;
		break;
	case V4L2_CID_AUDIO_MUTE:
		c->value = dev->ctl_mute;
		break;
	case V4L2_CID_AUDIO_VOLUME:
		c->value = dev->ctl_volume;
		break;
	case V4L2_CID_PRIVATE_INVERT:
		c->value = dev->ctl_invert;
		break;
	case V4L2_CID_HFLIP:
		c->value = dev->ctl_mirror;
		break;
	case V4L2_CID_PRIVATE_Y_EVEN:
		c->value = dev->ctl_y_even;
		break;
	case V4L2_CID_PRIVATE_Y_ODD:
		c->value = dev->ctl_y_odd;
		break;
	case V4L2_CID_PRIVATE_AUTOMUTE:
		c->value = dev->ctl_automute;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}
EXPORT_SYMBOL_GPL(saa7134_g_ctrl_internal);

static int saa7134_g_ctrl(struct file *file, void *priv, struct v4l2_control *c)
{
	struct saa7134_fh *fh = priv;

	return saa7134_g_ctrl_internal(fh->dev, fh, c);
}

int saa7134_s_ctrl_internal(struct saa7134_dev *dev,  struct saa7134_fh *fh, struct v4l2_control *c)
{
	const struct v4l2_queryctrl* ctrl;
	unsigned long flags;
	int restart_overlay = 0;
	int err;

	/* When called from the empress code fh == NULL.
	   That needs to be fixed somehow, but for now this is
	   good enough. */
	if (fh) {
		err = v4l2_prio_check(&dev->prio, &fh->prio);
		if (0 != err)
			return err;
	}
	err = -EINVAL;

	mutex_lock(&dev->lock);

	ctrl = ctrl_by_id(c->id);
	if (NULL == ctrl)
		goto error;

	dprintk("set_control name=%s val=%d\n",ctrl->name,c->value);
	switch (ctrl->type) {
	case V4L2_CTRL_TYPE_BOOLEAN:
	case V4L2_CTRL_TYPE_MENU:
	case V4L2_CTRL_TYPE_INTEGER:
		if (c->value < ctrl->minimum)
			c->value = ctrl->minimum;
		if (c->value > ctrl->maximum)
			c->value = ctrl->maximum;
		break;
	default:
		/* nothing */;
	};
	switch (c->id) {
	case V4L2_CID_BRIGHTNESS:
		dev->ctl_bright = c->value;
		saa_writeb(SAA7134_DEC_LUMA_BRIGHT, dev->ctl_bright);
		break;
	case V4L2_CID_HUE:
		dev->ctl_hue = c->value;
		saa_writeb(SAA7134_DEC_CHROMA_HUE, dev->ctl_hue);
		break;
	case V4L2_CID_CONTRAST:
		dev->ctl_contrast = c->value;
		saa_writeb(SAA7134_DEC_LUMA_CONTRAST,
			   dev->ctl_invert ? -dev->ctl_contrast : dev->ctl_contrast);
		break;
	case V4L2_CID_SATURATION:
		dev->ctl_saturation = c->value;
		saa_writeb(SAA7134_DEC_CHROMA_SATURATION,
			   dev->ctl_invert ? -dev->ctl_saturation : dev->ctl_saturation);
		break;
	case V4L2_CID_AUDIO_MUTE:
		dev->ctl_mute = c->value;
		saa7134_tvaudio_setmute(dev);
		break;
	case V4L2_CID_AUDIO_VOLUME:
		dev->ctl_volume = c->value;
		saa7134_tvaudio_setvolume(dev,dev->ctl_volume);
		break;
	case V4L2_CID_PRIVATE_INVERT:
		dev->ctl_invert = c->value;
		saa_writeb(SAA7134_DEC_LUMA_CONTRAST,
			   dev->ctl_invert ? -dev->ctl_contrast : dev->ctl_contrast);
		saa_writeb(SAA7134_DEC_CHROMA_SATURATION,
			   dev->ctl_invert ? -dev->ctl_saturation : dev->ctl_saturation);
		break;
	case V4L2_CID_HFLIP:
		dev->ctl_mirror = c->value;
		restart_overlay = 1;
		break;
	case V4L2_CID_PRIVATE_Y_EVEN:
		dev->ctl_y_even = c->value;
		restart_overlay = 1;
		break;
	case V4L2_CID_PRIVATE_Y_ODD:
		dev->ctl_y_odd = c->value;
		restart_overlay = 1;
		break;
	case V4L2_CID_PRIVATE_AUTOMUTE:
	{
		struct v4l2_priv_tun_config tda9887_cfg;

		tda9887_cfg.tuner = TUNER_TDA9887;
		tda9887_cfg.priv = &dev->tda9887_conf;

		dev->ctl_automute = c->value;
		if (dev->tda9887_conf) {
			if (dev->ctl_automute)
				dev->tda9887_conf |= TDA9887_AUTOMUTE;
			else
				dev->tda9887_conf &= ~TDA9887_AUTOMUTE;

			saa7134_i2c_call_clients(dev, TUNER_SET_CONFIG,
						 &tda9887_cfg);
		}
		break;
	}
	default:
		goto error;
	}
	if (restart_overlay && fh && res_check(fh, RESOURCE_OVERLAY)) {
		spin_lock_irqsave(&dev->slock,flags);
		stop_preview(dev,fh);
		start_preview(dev,fh);
		spin_unlock_irqrestore(&dev->slock,flags);
	}
	err = 0;

error:
	mutex_unlock(&dev->lock);
	return err;
}
EXPORT_SYMBOL_GPL(saa7134_s_ctrl_internal);

static int saa7134_s_ctrl(struct file *file, void *f, struct v4l2_control *c)
{
	struct saa7134_fh *fh = f;

	return saa7134_s_ctrl_internal(fh->dev, fh, c);
}

/* ------------------------------------------------------------------ */

static struct videobuf_queue* saa7134_queue(struct saa7134_fh *fh)
{
	struct videobuf_queue* q = NULL;

	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		q = &fh->cap;
		break;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		q = &fh->vbi;
		break;
	default:
		BUG();
	}
	return q;
}

static int saa7134_resource(struct saa7134_fh *fh)
{
	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return RESOURCE_VIDEO;

	if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
		return RESOURCE_VBI;

	BUG();
	return 0;
}

static int video_open(struct inode *inode, struct file *file)
{
	int minor = iminor(inode);
	struct saa7134_dev *dev;
	struct saa7134_fh *fh;
	enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	int radio = 0;

	lock_kernel();
	list_for_each_entry(dev, &saa7134_devlist, devlist) {
		if (dev->video_dev && (dev->video_dev->minor == minor))
			goto found;
		if (dev->radio_dev && (dev->radio_dev->minor == minor)) {
			radio = 1;
			goto found;
		}
		if (dev->vbi_dev && (dev->vbi_dev->minor == minor)) {
			type = V4L2_BUF_TYPE_VBI_CAPTURE;
			goto found;
		}
	}
	unlock_kernel();
	return -ENODEV;
 found:

	dprintk("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->fmt      = format_by_fourcc(V4L2_PIX_FMT_BGR24);
	fh->width    = 720;
	fh->height   = 576;
	v4l2_prio_open(&dev->prio,&fh->prio);

	videobuf_queue_sg_init(&fh->cap, &video_qops,
			    &dev->pci->dev, &dev->slock,
			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
			    V4L2_FIELD_INTERLACED,
			    sizeof(struct saa7134_buf),
			    fh);
	videobuf_queue_sg_init(&fh->vbi, &saa7134_vbi_qops,
			    &dev->pci->dev, &dev->slock,
			    V4L2_BUF_TYPE_VBI_CAPTURE,
			    V4L2_FIELD_SEQ_TB,
			    sizeof(struct saa7134_buf),
			    fh);
	saa7134_pgtable_alloc(dev->pci,&fh->pt_cap);
	saa7134_pgtable_alloc(dev->pci,&fh->pt_vbi);

	if (fh->radio) {
		/* switch to radio mode */
		saa7134_tvaudio_setinput(dev,&card(dev).radio);
		saa7134_i2c_call_clients(dev,AUDC_SET_RADIO, NULL);
	} else {
		/* switch to video/vbi mode */
		video_mux(dev,dev->ctl_input);
	}
	unlock_kernel();
	return 0;
}

static ssize_t
video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
{
	struct saa7134_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(saa7134_queue(fh),
					 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(saa7134_queue(fh),
					    data, count, ppos, 1,
					    file->f_flags & O_NONBLOCK);
		break;
	default:
		BUG();
		return 0;
	}
}

static unsigned int
video_poll(struct file *file, struct poll_table_struct *wait)
{
	struct saa7134_fh *fh = file->private_data;
	struct videobuf_buffer *buf = NULL;

	if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type)
		return videobuf_poll_stream(file, &fh->vbi, wait);

	if (res_check(fh,RESOURCE_VIDEO)) {
		if (!list_empty(&fh->cap.stream))
			buf = list_entry(fh->cap.stream.next, struct videobuf_buffer, stream);
	} else {
		mutex_lock(&fh->cap.vb_lock);
		if (UNSET == fh->cap.read_off) {
			/* need to capture a new frame */
			if (res_locked(fh->dev,RESOURCE_VIDEO))
				goto err;
			if (0 != fh->cap.ops->buf_prepare(&fh->cap,fh->cap.read_buf,fh->cap.field))
				goto err;
			fh->cap.ops->buf_queue(&fh->cap,fh->cap.read_buf);
			fh->cap.read_off = 0;
		}
		mutex_unlock(&fh->cap.vb_lock);
		buf = fh->cap.read_buf;
	}

	if (!buf)
		return POLLERR;

	poll_wait(file, &buf->done, wait);
	if (buf->state == VIDEOBUF_DONE ||
	    buf->state == VIDEOBUF_ERROR)
		return POLLIN|POLLRDNORM;
	return 0;

err:
	mutex_unlock(&fh->cap.vb_lock);
	return POLLERR;
}

static int video_release(struct inode *inode, struct file *file)
{
	struct saa7134_fh  *fh  = file->private_data;
	struct saa7134_dev *dev = fh->dev;
	unsigned long flags;

	/* turn off overlay */
	if (res_check(fh, RESOURCE_OVERLAY)) {
		spin_lock_irqsave(&dev->slock,flags);
		stop_preview(dev,fh);
		spin_unlock_irqrestore(&dev->slock,flags);
		res_free(dev,fh,RESOURCE_OVERLAY);
	}

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

	/* stop vbi capture */
	if (res_check(fh, RESOURCE_VBI)) {
		videobuf_stop(&fh->vbi);
		res_free(dev,fh,RESOURCE_VBI);
	}

	/* ts-capture will not work in planar mode, so turn it off Hac: 04.05*/
	saa_andorb(SAA7134_OFMT_VIDEO_A, 0x1f, 0);
	saa_andorb(SAA7134_OFMT_VIDEO_B, 0x1f, 0);
	saa_andorb(SAA7134_OFMT_DATA_A, 0x1f, 0);
	saa_andorb(SAA7134_OFMT_DATA_B, 0x1f, 0);

	saa7134_i2c_call_clients(dev, TUNER_SET_STANDBY, NULL);

	/* free stuff */
	videobuf_mmap_free(&fh->cap);
	videobuf_mmap_free(&fh->vbi);
	saa7134_pgtable_free(dev->pci,&fh->pt_cap);
	saa7134_pgtable_free(dev->pci,&fh->pt_vbi);

	v4l2_prio_close(&dev->prio,&fh->prio);
	file->private_data = NULL;
	kfree(fh);
	return 0;
}

static int video_mmap(struct file *file, struct vm_area_struct * vma)
{
	struct saa7134_fh *fh = file->private_data;