cx23885-video.c

trident tm5600的linux驱动

	/* stop vbi capture */
	if (res_check(fh, RESOURCE_VBI)) {
		if (fh->vbiq.streaming)
			videobuf_streamoff(&fh->vbiq);
		if (fh->vbiq.reading)
			videobuf_read_stop(&fh->vbiq);
		res_free(dev, fh, RESOURCE_VBI);
	}

	videobuf_mmap_free(&fh->vidq);
#if 0
	videobuf_mmap_free(&fh->vbiq);
#endif
	file->private_data = NULL;
	kfree(fh);

	/* We are not putting the tuner to sleep here on exit, because
	 * we want to use the mpeg encoder in another session to capture
	 * tuner video. Closing this will result in no video to the encoder.
	 */
#if 0
	cx23885_call_i2c_clients(&dev->i2c_bus[1], TUNER_SET_STANDBY, NULL);
#endif

	return 0;
}

static int video_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct cx23885_fh *fh = file->private_data;

	return videobuf_mmap_mapper(get_queue(fh), vma);
}

/* ------------------------------------------------------------------ */
/* VIDEO CTRL IOCTLS                                                  */

static int cx23885_get_control(struct cx23885_dev *dev,
	struct v4l2_control *ctl)
{
	dprintk(1, "%s() calling cx25840(VIDIOC_G_CTRL)\n", __func__);
	cx23885_call_i2c_clients(&dev->i2c_bus[2], VIDIOC_G_CTRL, ctl);
	return 0;
}

static int cx23885_set_control(struct cx23885_dev *dev,
	struct v4l2_control *ctl)
{
	dprintk(1, "%s() calling cx25840(VIDIOC_S_CTRL)"
		" (disabled - no action)\n", __func__);
#if 0
	cx23885_call_i2c_clients(&dev->i2c_bus[2], VIDIOC_S_CTRL, ctl);
#endif
	return 0;
}

static void init_controls(struct cx23885_dev *dev)
{
	struct v4l2_control ctrl;
	int i;

	for (i = 0; i < CX23885_CTLS; i++) {
		ctrl.id = cx23885_ctls[i].v.id;
		ctrl.value = cx23885_ctls[i].v.default_value;

		cx23885_set_control(dev, &ctrl);
	}
}

/* ------------------------------------------------------------------ */
/* VIDEO IOCTLS                                                       */

static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
	struct v4l2_format *f)
{
	struct cx23885_fh *fh   = priv;

	f->fmt.pix.width        = fh->width;
	f->fmt.pix.height       = fh->height;
	f->fmt.pix.field        = fh->vidq.field;
	f->fmt.pix.pixelformat  = fh->fmt->fourcc;
	f->fmt.pix.bytesperline =
		(f->fmt.pix.width * fh->fmt->depth) >> 3;
	f->fmt.pix.sizeimage =
		f->fmt.pix.height * f->fmt.pix.bytesperline;

	return 0;
}

static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
	struct v4l2_format *f)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;
	struct cx23885_fmt *fmt;
	enum v4l2_field   field;
	unsigned int      maxw, maxh;

	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
	if (NULL == fmt)
		return -EINVAL;

	field = f->fmt.pix.field;
	maxw  = norm_maxw(dev->tvnorm);
	maxh  = norm_maxh(dev->tvnorm);

	if (V4L2_FIELD_ANY == field) {
		field = (f->fmt.pix.height > maxh/2)
			? V4L2_FIELD_INTERLACED
			: V4L2_FIELD_BOTTOM;
	}

	switch (field) {
	case V4L2_FIELD_TOP:
	case V4L2_FIELD_BOTTOM:
		maxh = maxh / 2;
		break;
	case V4L2_FIELD_INTERLACED:
		break;
	default:
		return -EINVAL;
	}

	f->fmt.pix.field = field;
	if (f->fmt.pix.height < 32)
		f->fmt.pix.height = 32;
	if (f->fmt.pix.height > maxh)
		f->fmt.pix.height = maxh;
	if (f->fmt.pix.width < 48)
		f->fmt.pix.width = 48;
	if (f->fmt.pix.width > maxw)
		f->fmt.pix.width = maxw;
	f->fmt.pix.width &= ~0x03;
	f->fmt.pix.bytesperline =
		(f->fmt.pix.width * fmt->depth) >> 3;
	f->fmt.pix.sizeimage =
		f->fmt.pix.height * f->fmt.pix.bytesperline;

	return 0;
}

static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
	struct v4l2_format *f)
{
	struct cx23885_fh *fh = priv;
	struct cx23885_dev *dev  = ((struct cx23885_fh *)priv)->dev;
	int err;

	dprintk(2, "%s()\n", __func__);
	err = vidioc_try_fmt_vid_cap(file, priv, f);

	if (0 != err)
		return err;
	fh->fmt        = format_by_fourcc(f->fmt.pix.pixelformat);
	fh->width      = f->fmt.pix.width;
	fh->height     = f->fmt.pix.height;
	fh->vidq.field = f->fmt.pix.field;
	dprintk(2, "%s() width=%d height=%d field=%d\n", __func__,
		fh->width, fh->height, fh->vidq.field);
	cx23885_call_i2c_clients(&dev->i2c_bus[2], VIDIOC_S_FMT, f);
	return 0;
}

static int vidioc_querycap(struct file *file, void  *priv,
	struct v4l2_capability *cap)
{
	struct cx23885_dev *dev  = ((struct cx23885_fh *)priv)->dev;

	strcpy(cap->driver, "cx23885");
	strlcpy(cap->card, cx23885_boards[dev->board].name,
		sizeof(cap->card));
	sprintf(cap->bus_info, "PCIe:%s", pci_name(dev->pci));
	cap->version = CX23885_VERSION_CODE;
	cap->capabilities =
#if 0
		V4L2_CAP_VIDEO_OVERLAY |
#endif
		V4L2_CAP_VIDEO_CAPTURE |
		V4L2_CAP_READWRITE     |
		V4L2_CAP_STREAMING     |
		V4L2_CAP_VBI_CAPTURE;
	if (UNSET != dev->tuner_type)
		cap->capabilities |= V4L2_CAP_TUNER;
	return 0;
}

static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
	struct v4l2_fmtdesc *f)
{
	if (unlikely(f->index >= ARRAY_SIZE(formats)))
		return -EINVAL;

	strlcpy(f->description, formats[f->index].name,
		sizeof(f->description));
	f->pixelformat = formats[f->index].fourcc;

	return 0;
}

#ifdef CONFIG_VIDEO_V4L1_COMPAT
static int vidiocgmbuf(struct file *file, void *priv,
	struct video_mbuf *mbuf)
{
	struct cx23885_fh *fh = priv;
	struct videobuf_queue *q;
	struct v4l2_requestbuffers req;
	unsigned int i;
	int err;

	q = get_queue(fh);
	memset(&req, 0, sizeof(req));
	req.type   = q->type;
	req.count  = 8;
	req.memory = V4L2_MEMORY_MMAP;
	err = videobuf_reqbufs(q, &req);
	if (err < 0)
		return err;

	mbuf->frames = req.count;
	mbuf->size   = 0;
	for (i = 0; i < mbuf->frames; i++) {
		mbuf->offsets[i]  = q->bufs[i]->boff;
		mbuf->size       += q->bufs[i]->bsize;
	}
	return 0;
}
#endif

static int vidioc_reqbufs(struct file *file, void *priv,
	struct v4l2_requestbuffers *p)
{
	struct cx23885_fh *fh = priv;
	return videobuf_reqbufs(get_queue(fh), p);
}

static int vidioc_querybuf(struct file *file, void *priv,
	struct v4l2_buffer *p)
{
	struct cx23885_fh *fh = priv;
	return videobuf_querybuf(get_queue(fh), p);
}

static int vidioc_qbuf(struct file *file, void *priv,
	struct v4l2_buffer *p)
{
	struct cx23885_fh *fh = priv;
	return videobuf_qbuf(get_queue(fh), p);
}

static int vidioc_dqbuf(struct file *file, void *priv,
	struct v4l2_buffer *p)
{
	struct cx23885_fh *fh = priv;
	return videobuf_dqbuf(get_queue(fh), p,
				file->f_flags & O_NONBLOCK);
}

static int vidioc_streamon(struct file *file, void *priv,
	enum v4l2_buf_type i)
{
	struct cx23885_fh *fh = priv;
	struct cx23885_dev *dev = fh->dev;
	dprintk(1, "%s()\n", __func__);

	if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
		return -EINVAL;
	if (unlikely(i != fh->type))
		return -EINVAL;

	if (unlikely(!res_get(dev, fh, get_resource(fh))))
		return -EBUSY;
	return videobuf_streamon(get_queue(fh));
}

static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
	struct cx23885_fh *fh = priv;
	struct cx23885_dev *dev = fh->dev;
	int err, res;
	dprintk(1, "%s()\n", __func__);

	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
	if (i != fh->type)
		return -EINVAL;

	res = get_resource(fh);
	err = videobuf_streamoff(get_queue(fh));
	if (err < 0)
		return err;
	res_free(dev, fh, res);
	return 0;
}

static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *tvnorms)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;
	dprintk(1, "%s()\n", __func__);

	mutex_lock(&dev->lock);
	cx23885_set_tvnorm(dev, *tvnorms);
	mutex_unlock(&dev->lock);

	return 0;
}

static int cx23885_enum_input(struct cx23885_dev *dev, struct v4l2_input *i)
{
	static const char *iname[] = {
		[CX23885_VMUX_COMPOSITE1] = "Composite1",
		[CX23885_VMUX_COMPOSITE2] = "Composite2",
		[CX23885_VMUX_COMPOSITE3] = "Composite3",
		[CX23885_VMUX_COMPOSITE4] = "Composite4",
		[CX23885_VMUX_SVIDEO]     = "S-Video",
		[CX23885_VMUX_TELEVISION] = "Television",
		[CX23885_VMUX_CABLE]      = "Cable TV",
		[CX23885_VMUX_DVB]        = "DVB",
		[CX23885_VMUX_DEBUG]      = "for debug only",
	};
	unsigned int n;
	dprintk(1, "%s()\n", __func__);

	n = i->index;
	if (n >= 4)
		return -EINVAL;

	if (0 == INPUT(n)->type)
		return -EINVAL;

	memset(i, 0, sizeof(*i));
	i->index = n;
	i->type  = V4L2_INPUT_TYPE_CAMERA;
	strcpy(i->name, iname[INPUT(n)->type]);
	if ((CX23885_VMUX_TELEVISION == INPUT(n)->type) ||
		(CX23885_VMUX_CABLE == INPUT(n)->type))
		i->type = V4L2_INPUT_TYPE_TUNER;
		i->std = CX23885_NORMS;
	return 0;
}

static int vidioc_enum_input(struct file *file, void *priv,
				struct v4l2_input *i)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;
	dprintk(1, "%s()\n", __func__);
	return cx23885_enum_input(dev, i);
}

static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	*i = dev->input;
	dprintk(1, "%s() returns %d\n", __func__, *i);
	return 0;
}

static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	dprintk(1, "%s(%d)\n", __func__, i);

	if (i >= 4) {
		dprintk(1, "%s() -EINVAL\n", __func__);
		return -EINVAL;
	}

	mutex_lock(&dev->lock);
	cx23885_video_mux(dev, i);
	mutex_unlock(&dev->lock);
	return 0;
}

static int vidioc_queryctrl(struct file *file, void *priv,
				struct v4l2_queryctrl *qctrl)
{
	qctrl->id = v4l2_ctrl_next(ctrl_classes, qctrl->id);
	if (unlikely(qctrl->id == 0))
		return -EINVAL;
	return cx23885_ctrl_query(qctrl);
}

static int vidioc_g_ctrl(struct file *file, void *priv,
				struct v4l2_control *ctl)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	return cx23885_get_control(dev, ctl);
}

static int vidioc_s_ctrl(struct file *file, void *priv,
				struct v4l2_control *ctl)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	return cx23885_set_control(dev, ctl);
}

static int vidioc_g_tuner(struct file *file, void *priv,
				struct v4l2_tuner *t)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	if (unlikely(UNSET == dev->tuner_type))
		return -EINVAL;
	if (0 != t->index)
		return -EINVAL;

	strcpy(t->name, "Television");
	t->type       = V4L2_TUNER_ANALOG_TV;
	t->capability = V4L2_TUNER_CAP_NORM;
	t->rangehigh  = 0xffffffffUL;
#if 0
	cx23885_get_stereo(dev, t);
#endif
	t->signal = 0xffff ; /* LOCKED */
	return 0;
}

static int vidioc_s_tuner(struct file *file, void *priv,
				struct v4l2_tuner *t)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	if (UNSET == dev->tuner_type)
		return -EINVAL;
	if (0 != t->index)
		return -EINVAL;
#if 0
	cx23885_set_stereo(dev, t->audmode, 1);
#endif
	return 0;
}

static int vidioc_g_frequency(struct file *file, void *priv,
				struct v4l2_frequency *f)
{
	struct cx23885_fh *fh = priv;
	struct cx23885_dev *dev = fh->dev;

	if (unlikely(UNSET == dev->tuner_type))
		return -EINVAL;

	/* f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; */
	f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
	f->frequency = dev->freq;

	cx23885_call_i2c_clients(&dev->i2c_bus[1], VIDIOC_G_FREQUENCY, f);

	return 0;
}

static int cx23885_set_freq(struct cx23885_dev *dev, struct v4l2_frequency *f)
{
	if (unlikely(UNSET == dev->tuner_type))
		return -EINVAL;
	if (unlikely(f->tuner != 0))
		return -EINVAL;

	mutex_lock(&dev->lock);
	dev->freq = f->frequency;

	cx23885_call_i2c_clients(&dev->i2c_bus[1], VIDIOC_S_FREQUENCY, f);