In previous commit, a support for transmitted packets is added. This commit add a support for capturing PCM samples.
When any streams are already started, this driver should not change sampling rate of the device, thus this commit also adds a restriction of sampling rate in this situation.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/oxfw/oxfw-pcm.c | 201 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 181 insertions(+), 20 deletions(-)
diff --git a/sound/firewire/oxfw/oxfw-pcm.c b/sound/firewire/oxfw/oxfw-pcm.c index a78339c..9db40bf 100644 --- a/sound/firewire/oxfw/oxfw-pcm.c +++ b/sound/firewire/oxfw/oxfw-pcm.c @@ -118,21 +118,31 @@ static void limit_period_and_buffer(struct snd_pcm_hardware *hw) hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min; }
-static int pcm_open(struct snd_pcm_substream *substream) +static int init_hw_params(struct snd_oxfw *oxfw, + struct snd_pcm_substream *substream) { - struct snd_oxfw *oxfw = substream->private_data; struct snd_pcm_runtime *runtime = substream->runtime; u8 **formats; + struct amdtp_stream *stream; int err;
- formats = oxfw->rx_stream_formats; - runtime->hw.info = SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_JOINT_DUPLEX | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID;
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { + runtime->hw.formats = AMDTP_IN_PCM_FORMAT_BITS; + stream = &oxfw->tx_stream; + formats = oxfw->tx_stream_formats; + } else { + runtime->hw.formats = AMDTP_OUT_PCM_FORMAT_BITS; + stream = &oxfw->rx_stream; + formats = oxfw->rx_stream_formats; + } + limit_channels_and_rates(&runtime->hw, formats); limit_period_and_buffer(&runtime->hw);
@@ -148,10 +158,55 @@ static int pcm_open(struct snd_pcm_substream *substream) if (err < 0) goto end;
- err = amdtp_stream_add_pcm_hw_constraints(&oxfw->rx_stream, runtime); + err = amdtp_stream_add_pcm_hw_constraints(stream, runtime); +end: + return err; +} + +static int limit_to_current_params(struct snd_pcm_substream *substream) +{ + struct snd_oxfw *oxfw = substream->private_data; + struct snd_oxfw_stream_formation formation; + enum avc_general_plug_dir dir; + int err; + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + dir = AVC_GENERAL_PLUG_DIR_OUT; + else + dir = AVC_GENERAL_PLUG_DIR_IN; + + err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation); + if (err < 0) + goto end; + + substream->runtime->hw.channels_min = formation.pcm; + substream->runtime->hw.channels_max = formation.pcm; + substream->runtime->hw.rate_min = formation.rate; + substream->runtime->hw.rate_max = formation.rate; +end: + return err; +} + +static int pcm_open(struct snd_pcm_substream *substream) +{ + struct snd_oxfw *oxfw = substream->private_data; + int err; + + err = init_hw_params(oxfw, substream); if (err < 0) goto end;
+ /* + * When any PCM streams are already running, the available sampling + * rate is limited at current value. + */ + if (amdtp_stream_pcm_running(&oxfw->tx_stream) || + amdtp_stream_pcm_running(&oxfw->rx_stream)) { + err = limit_to_current_params(substream); + if (err < 0) + goto end; + } + snd_pcm_set_sync(substream); end: return err; @@ -162,28 +217,90 @@ static int pcm_close(struct snd_pcm_substream *substream) return 0; }
-static int pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *hw_params) +static int pcm_capture_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct snd_oxfw *oxfw = substream->private_data; + + mutex_lock(&oxfw->mutex); + + if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) + oxfw->capture_substreams++; + + mutex_unlock(&oxfw->mutex); + + amdtp_stream_set_pcm_format(&oxfw->tx_stream, params_format(hw_params)); + + return snd_pcm_lib_alloc_vmalloc_buffer(substream, + params_buffer_bytes(hw_params)); +} +static int pcm_playback_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) { struct snd_oxfw *oxfw = substream->private_data;
+ mutex_lock(&oxfw->mutex); + + if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) + oxfw->playback_substreams++; + + mutex_unlock(&oxfw->mutex); + amdtp_stream_set_pcm_format(&oxfw->rx_stream, params_format(hw_params)); + return snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params)); }
-static int pcm_hw_free(struct snd_pcm_substream *substream) +static int pcm_capture_hw_free(struct snd_pcm_substream *substream) { struct snd_oxfw *oxfw = substream->private_data;
mutex_lock(&oxfw->mutex); + + if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) + oxfw->capture_substreams--; + + snd_oxfw_stream_stop_simplex(oxfw, &oxfw->tx_stream); + + mutex_unlock(&oxfw->mutex); + + return snd_pcm_lib_free_vmalloc_buffer(substream); +} +static int pcm_playback_hw_free(struct snd_pcm_substream *substream) +{ + struct snd_oxfw *oxfw = substream->private_data; + + mutex_lock(&oxfw->mutex); + + if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) + oxfw->playback_substreams--; + snd_oxfw_stream_stop_simplex(oxfw, &oxfw->rx_stream); + mutex_unlock(&oxfw->mutex);
return snd_pcm_lib_free_vmalloc_buffer(substream); }
-static int pcm_prepare(struct snd_pcm_substream *substream) +static int pcm_capture_prepare(struct snd_pcm_substream *substream) +{ + struct snd_oxfw *oxfw = substream->private_data; + struct snd_pcm_runtime *runtime = substream->runtime; + int err; + + mutex_lock(&oxfw->mutex); + err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->tx_stream, + runtime->rate, runtime->channels); + mutex_unlock(&oxfw->mutex); + if (err < 0) + goto end; + + amdtp_stream_pcm_prepare(&oxfw->tx_stream); +end: + return err; +} +static int pcm_playback_prepare(struct snd_pcm_substream *substream) { struct snd_oxfw *oxfw = substream->private_data; struct snd_pcm_runtime *runtime = substream->runtime; @@ -201,7 +318,25 @@ end: return err; }
-static int pcm_trigger(struct snd_pcm_substream *substream, int cmd) +static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct snd_oxfw *oxfw = substream->private_data; + struct snd_pcm_substream *pcm; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + pcm = substream; + break; + case SNDRV_PCM_TRIGGER_STOP: + pcm = NULL; + break; + default: + return -EINVAL; + } + amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm); + return 0; +} +static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_oxfw *oxfw = substream->private_data; struct snd_pcm_substream *pcm; @@ -220,35 +355,61 @@ static int pcm_trigger(struct snd_pcm_substream *substream, int cmd) return 0; }
-static snd_pcm_uframes_t pcm_pointer(struct snd_pcm_substream *substream) +static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm) { - struct snd_oxfw *oxfw = substream->private_data; + struct snd_oxfw *oxfw = sbstm->private_data; + + return amdtp_stream_pcm_pointer(&oxfw->tx_stream); +} +static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm) +{ + struct snd_oxfw *oxfw = sbstm->private_data;
return amdtp_stream_pcm_pointer(&oxfw->rx_stream); }
int snd_oxfw_create_pcm(struct snd_oxfw *oxfw) { - static struct snd_pcm_ops ops = { + static struct snd_pcm_ops capture_ops = { .open = pcm_open, .close = pcm_close, .ioctl = snd_pcm_lib_ioctl, - .hw_params = pcm_hw_params, - .hw_free = pcm_hw_free, - .prepare = pcm_prepare, - .trigger = pcm_trigger, - .pointer = pcm_pointer, + .hw_params = pcm_capture_hw_params, + .hw_free = pcm_capture_hw_free, + .prepare = pcm_capture_prepare, + .trigger = pcm_capture_trigger, + .pointer = pcm_capture_pointer, + .page = snd_pcm_lib_get_vmalloc_page, + .mmap = snd_pcm_lib_mmap_vmalloc, + }; + static struct snd_pcm_ops playback_ops = { + .open = pcm_open, + .close = pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = pcm_playback_hw_params, + .hw_free = pcm_playback_hw_free, + .prepare = pcm_playback_prepare, + .trigger = pcm_playback_trigger, + .pointer = pcm_playback_pointer, .page = snd_pcm_lib_get_vmalloc_page, .mmap = snd_pcm_lib_mmap_vmalloc, }; struct snd_pcm *pcm; + unsigned int cap = 0; int err;
- err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, 0, &pcm); + if (oxfw->has_output) + cap = 1; + + err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm); if (err < 0) return err; + pcm->private_data = oxfw; strcpy(pcm->name, oxfw->card->shortname); - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ops); + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); + if (cap > 0) + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); + return 0; }