/* 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;
}
static int snd_cx18_pcm_capture_open(struct snd_pcm_substream *substream)
{
struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
struct cx18 *cx = to_cx18(v4l2_dev);
struct cx18_stream *s;
struct cx18_open_id item;
int ret;
/* Instruct the cx18 to start sending packets */
snd_cx18_lock(cxsc);
s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM];
item.cx = cx;
item.type = s->type;
item.open_id = cx->open_id++;
/* See if the stream is available */
if (cx18_claim_stream(&item, item.type)) {
/* No, it's already in use */
snd_cx18_unlock(cxsc);
return -EBUSY;
}
if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) ||
test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) {
/* We're already streaming. No additional action required */
snd_cx18_unlock(cxsc);
return 0;
}
runtime->hw = snd_cx18_hw_capture;
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
cxsc->capture_pcm_substream = substream;
runtime->private_data = cx;
cx->pcm_announce_callback = cx18_alsa_announce_pcm_data;
/* Not currently streaming, so start it up */
set_bit(CX18_F_S_STREAMING, &s->s_flags);
ret = cx18_start_v4l2_encode_stream(s);
snd_cx18_unlock(cxsc);
return ret;
}
int cx18_start_capture(struct cx18_open_id *id)
{
struct cx18 *cx = id->cx;
struct cx18_stream *s = &cx->streams[id->type];
struct cx18_stream *s_vbi;
if (s->type == CX18_ENC_STREAM_TYPE_RAD) {
/* you cannot read from these stream types. */
return -EPERM;
}
/* Try to claim this stream. */
if (cx18_claim_stream(id, s->type))
return -EBUSY;
/* If capture is already in progress, then we also have to
do nothing extra. */
if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) ||
test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) {
set_bit(CX18_F_S_APPL_IO, &s->s_flags);
return 0;
}
/* Start VBI capture if required */
s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
if (s->type == CX18_ENC_STREAM_TYPE_MPG &&
test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
!test_and_set_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) {
/* Note: the CX18_ENC_STREAM_TYPE_VBI is claimed
automatically when the MPG stream is claimed.
We only need to start the VBI capturing. */
if (cx18_start_v4l2_encode_stream(s_vbi)) {
CX18_DEBUG_WARN("VBI capture start failed\n");
/* Failure, clean up and return an error */
clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags);
clear_bit(CX18_F_S_STREAMING, &s->s_flags);
/* also releases the associated VBI stream */
cx18_release_stream(s);
return -EIO;
}
CX18_DEBUG_INFO("VBI insertion started\n");
}
/* Tell the card to start capturing */
if (!cx18_start_v4l2_encode_stream(s)) {
/* We're done */
set_bit(CX18_F_S_APPL_IO, &s->s_flags);
/* Resume a possibly paused encoder */
if (test_and_clear_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags))
cx18_vapi(cx, CX18_CPU_CAPTURE_PAUSE, 1, s->handle);
return 0;
}
/* failure, clean up */
CX18_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name);
/* Note: the CX18_ENC_STREAM_TYPE_VBI is released
automatically when the MPG stream is released.
We only need to stop the VBI capturing. */
if (s->type == CX18_ENC_STREAM_TYPE_MPG &&
test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) {
cx18_stop_v4l2_encode_stream(s_vbi, 0);
clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags);
}
clear_bit(CX18_F_S_STREAMING, &s->s_flags);
cx18_release_stream(s);
return -EIO;
}
