/* Kernel DVB framework calls this when the feed needs to start.
* The CX18 framework should enable the transport DMA handling
* and queue processing.
*/
static int cx18_dvb_start_feed(struct dvb_demux_feed *feed)
{
struct dvb_demux *demux = feed->demux;
struct cx18_stream *stream = (struct cx18_stream *) demux->priv;
struct cx18 *cx = stream->cx;
int ret;
u32 v;
CX18_DEBUG_INFO("Start feed: pid = 0x%x index = %d\n",
feed->pid, feed->index);
mutex_lock(&cx->serialize_lock);
ret = cx18_init_on_first_open(cx);
mutex_unlock(&cx->serialize_lock);
if (ret) {
CX18_ERR("Failed to initialize firmware starting DVB feed\n");
return ret;
}
ret = -EINVAL;
switch (cx->card->type) {
case CX18_CARD_HVR_1600_ESMT:
case CX18_CARD_HVR_1600_SAMSUNG:
v = cx18_read_reg(cx, CX18_REG_DMUX_NUM_PORT_0_CONTROL);
v |= 0x00400000; /* Serial Mode */
v |= 0x00002000; /* Data Length - Byte */
v |= 0x00010000; /* Error - Polarity */
v |= 0x00020000; /* Error - Passthru */
v |= 0x000c0000; /* Error - Ignore */
cx18_write_reg(cx, v, CX18_REG_DMUX_NUM_PORT_0_CONTROL);
break;
default:
/* Assumption - Parallel transport - Signalling
* undefined or default.
*/
break;
}
if (!demux->dmx.frontend)
return -EINVAL;
if (stream) {
mutex_lock(&stream->dvb.feedlock);
if (stream->dvb.feeding++ == 0) {
CX18_DEBUG_INFO("Starting Transport DMA\n");
ret = cx18_start_v4l2_encode_stream(stream);
if (ret < 0) {
CX18_DEBUG_INFO(
"Failed to start Transport DMA\n");
stream->dvb.feeding--;
}
} else
ret = 0;
mutex_unlock(&stream->dvb.feedlock);
}
return ret;
}
int cx18_v4l2_open(struct file *filp)
{
int res;
struct video_device *video_dev = video_devdata(filp);
struct cx18_stream *s = video_get_drvdata(video_dev);
struct cx18 *cx = s->cx;
mutex_lock(&cx->serialize_lock);
if (cx18_init_on_first_open(cx)) {
CX18_ERR("Failed to initialize on minor %d\n",
video_dev->minor);
mutex_unlock(&cx->serialize_lock);
return -ENXIO;
}
res = cx18_serialized_open(s, filp);
mutex_unlock(&cx->serialize_lock);
return res;
}
int cx18_v4l2_open(struct inode *inode, struct file *filp)
{
int res, x, y = 0;
struct cx18 *cx = NULL;
struct cx18_stream *s = NULL;
int minor = iminor(inode);
/* Find which card this open was on */
spin_lock(&cx18_cards_lock);
for (x = 0; cx == NULL && x < cx18_cards_active; x++) {
/* find out which stream this open was on */
for (y = 0; y < CX18_MAX_STREAMS; y++) {
if (cx18_cards[x] == NULL)
continue;
s = &cx18_cards[x]->streams[y];
if (s->v4l2dev && s->v4l2dev->minor == minor) {
cx = cx18_cards[x];
break;
}
}
}
spin_unlock(&cx18_cards_lock);
if (cx == NULL) {
/* Couldn't find a device registered
on that minor, shouldn't happen! */
printk(KERN_WARNING "No cx18 device found on minor %d\n",
minor);
return -ENXIO;
}
mutex_lock(&cx->serialize_lock);
if (cx18_init_on_first_open(cx)) {
CX18_ERR("Failed to initialize on minor %d\n", minor);
mutex_unlock(&cx->serialize_lock);
return -ENXIO;
}
res = cx18_serialized_open(s, filp);
mutex_unlock(&cx->serialize_lock);
return res;
}
