forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
370 lines
9.3 KiB
370 lines
9.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* motu-pcm.c - a part of driver for MOTU FireWire series |
|
* |
|
* Copyright (c) 2015-2017 Takashi Sakamoto <[email protected]> |
|
*/ |
|
|
|
#include <sound/pcm_params.h> |
|
#include "motu.h" |
|
|
|
static int motu_rate_constraint(struct snd_pcm_hw_params *params, |
|
struct snd_pcm_hw_rule *rule) |
|
{ |
|
struct snd_motu_packet_format *formats = rule->private; |
|
|
|
const struct snd_interval *c = |
|
hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
|
struct snd_interval *r = |
|
hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
|
struct snd_interval rates = { |
|
.min = UINT_MAX, .max = 0, .integer = 1 |
|
}; |
|
unsigned int i, pcm_channels, rate, mode; |
|
|
|
for (i = 0; i < ARRAY_SIZE(snd_motu_clock_rates); ++i) { |
|
rate = snd_motu_clock_rates[i]; |
|
mode = i / 2; |
|
|
|
pcm_channels = formats->pcm_chunks[mode]; |
|
if (!snd_interval_test(c, pcm_channels)) |
|
continue; |
|
|
|
rates.min = min(rates.min, rate); |
|
rates.max = max(rates.max, rate); |
|
} |
|
|
|
return snd_interval_refine(r, &rates); |
|
} |
|
|
|
static int motu_channels_constraint(struct snd_pcm_hw_params *params, |
|
struct snd_pcm_hw_rule *rule) |
|
{ |
|
struct snd_motu_packet_format *formats = rule->private; |
|
|
|
const struct snd_interval *r = |
|
hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); |
|
struct snd_interval *c = |
|
hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
|
struct snd_interval channels = { |
|
.min = UINT_MAX, .max = 0, .integer = 1 |
|
}; |
|
unsigned int i, pcm_channels, rate, mode; |
|
|
|
for (i = 0; i < ARRAY_SIZE(snd_motu_clock_rates); ++i) { |
|
rate = snd_motu_clock_rates[i]; |
|
mode = i / 2; |
|
|
|
if (!snd_interval_test(r, rate)) |
|
continue; |
|
|
|
pcm_channels = formats->pcm_chunks[mode]; |
|
channels.min = min(channels.min, pcm_channels); |
|
channels.max = max(channels.max, pcm_channels); |
|
} |
|
|
|
return snd_interval_refine(c, &channels); |
|
} |
|
|
|
static void limit_channels_and_rates(struct snd_motu *motu, |
|
struct snd_pcm_runtime *runtime, |
|
struct snd_motu_packet_format *formats) |
|
{ |
|
struct snd_pcm_hardware *hw = &runtime->hw; |
|
unsigned int i, pcm_channels, rate, mode; |
|
|
|
hw->channels_min = UINT_MAX; |
|
hw->channels_max = 0; |
|
|
|
for (i = 0; i < ARRAY_SIZE(snd_motu_clock_rates); ++i) { |
|
rate = snd_motu_clock_rates[i]; |
|
mode = i / 2; |
|
|
|
pcm_channels = formats->pcm_chunks[mode]; |
|
if (pcm_channels == 0) |
|
continue; |
|
|
|
hw->rates |= snd_pcm_rate_to_rate_bit(rate); |
|
hw->channels_min = min(hw->channels_min, pcm_channels); |
|
hw->channels_max = max(hw->channels_max, pcm_channels); |
|
} |
|
|
|
snd_pcm_limit_hw_rates(runtime); |
|
} |
|
|
|
static int init_hw_info(struct snd_motu *motu, |
|
struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
struct snd_pcm_hardware *hw = &runtime->hw; |
|
struct amdtp_stream *stream; |
|
struct snd_motu_packet_format *formats; |
|
int err; |
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
|
hw->formats = SNDRV_PCM_FMTBIT_S32; |
|
stream = &motu->tx_stream; |
|
formats = &motu->tx_packet_formats; |
|
} else { |
|
hw->formats = SNDRV_PCM_FMTBIT_S32; |
|
stream = &motu->rx_stream; |
|
formats = &motu->rx_packet_formats; |
|
} |
|
|
|
limit_channels_and_rates(motu, runtime, formats); |
|
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
|
motu_rate_constraint, formats, |
|
SNDRV_PCM_HW_PARAM_CHANNELS, -1); |
|
if (err < 0) |
|
return err; |
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
|
motu_channels_constraint, formats, |
|
SNDRV_PCM_HW_PARAM_RATE, -1); |
|
if (err < 0) |
|
return err; |
|
|
|
return amdtp_motu_add_pcm_hw_constraints(stream, runtime); |
|
} |
|
|
|
static int pcm_open(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
struct amdtp_domain *d = &motu->domain; |
|
enum snd_motu_clock_source src; |
|
int err; |
|
|
|
err = snd_motu_stream_lock_try(motu); |
|
if (err < 0) |
|
return err; |
|
|
|
mutex_lock(&motu->mutex); |
|
|
|
err = snd_motu_stream_cache_packet_formats(motu); |
|
if (err < 0) |
|
goto err_locked; |
|
|
|
err = init_hw_info(motu, substream); |
|
if (err < 0) |
|
goto err_locked; |
|
|
|
err = snd_motu_protocol_get_clock_source(motu, &src); |
|
if (err < 0) |
|
goto err_locked; |
|
|
|
// When source of clock is not internal or any stream is reserved for |
|
// transmission of PCM frames, the available sampling rate is limited |
|
// at current one. |
|
if ((src != SND_MOTU_CLOCK_SOURCE_INTERNAL && |
|
src != SND_MOTU_CLOCK_SOURCE_SPH) || |
|
(motu->substreams_counter > 0 && d->events_per_period > 0)) { |
|
unsigned int frames_per_period = d->events_per_period; |
|
unsigned int frames_per_buffer = d->events_per_buffer; |
|
unsigned int rate; |
|
|
|
err = snd_motu_protocol_get_clock_rate(motu, &rate); |
|
if (err < 0) |
|
goto err_locked; |
|
|
|
substream->runtime->hw.rate_min = rate; |
|
substream->runtime->hw.rate_max = rate; |
|
|
|
if (frames_per_period > 0) { |
|
err = snd_pcm_hw_constraint_minmax(substream->runtime, |
|
SNDRV_PCM_HW_PARAM_PERIOD_SIZE, |
|
frames_per_period, frames_per_period); |
|
if (err < 0) |
|
goto err_locked; |
|
|
|
err = snd_pcm_hw_constraint_minmax(substream->runtime, |
|
SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
|
frames_per_buffer, frames_per_buffer); |
|
if (err < 0) |
|
goto err_locked; |
|
} |
|
} |
|
|
|
snd_pcm_set_sync(substream); |
|
|
|
mutex_unlock(&motu->mutex); |
|
|
|
return 0; |
|
err_locked: |
|
mutex_unlock(&motu->mutex); |
|
snd_motu_stream_lock_release(motu); |
|
return err; |
|
} |
|
|
|
static int pcm_close(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
|
|
snd_motu_stream_lock_release(motu); |
|
|
|
return 0; |
|
} |
|
|
|
static int pcm_hw_params(struct snd_pcm_substream *substream, |
|
struct snd_pcm_hw_params *hw_params) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
int err = 0; |
|
|
|
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
|
unsigned int rate = params_rate(hw_params); |
|
unsigned int frames_per_period = params_period_size(hw_params); |
|
unsigned int frames_per_buffer = params_buffer_size(hw_params); |
|
|
|
mutex_lock(&motu->mutex); |
|
err = snd_motu_stream_reserve_duplex(motu, rate, |
|
frames_per_period, frames_per_buffer); |
|
if (err >= 0) |
|
++motu->substreams_counter; |
|
mutex_unlock(&motu->mutex); |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static int pcm_hw_free(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
|
|
mutex_lock(&motu->mutex); |
|
|
|
if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) |
|
--motu->substreams_counter; |
|
|
|
snd_motu_stream_stop_duplex(motu); |
|
|
|
mutex_unlock(&motu->mutex); |
|
|
|
return 0; |
|
} |
|
|
|
static int capture_prepare(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
int err; |
|
|
|
mutex_lock(&motu->mutex); |
|
err = snd_motu_stream_start_duplex(motu); |
|
mutex_unlock(&motu->mutex); |
|
if (err >= 0) |
|
amdtp_stream_pcm_prepare(&motu->tx_stream); |
|
|
|
return 0; |
|
} |
|
static int playback_prepare(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
int err; |
|
|
|
mutex_lock(&motu->mutex); |
|
err = snd_motu_stream_start_duplex(motu); |
|
mutex_unlock(&motu->mutex); |
|
if (err >= 0) |
|
amdtp_stream_pcm_prepare(&motu->rx_stream); |
|
|
|
return err; |
|
} |
|
|
|
static int capture_trigger(struct snd_pcm_substream *substream, int cmd) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
|
|
switch (cmd) { |
|
case SNDRV_PCM_TRIGGER_START: |
|
amdtp_stream_pcm_trigger(&motu->tx_stream, substream); |
|
break; |
|
case SNDRV_PCM_TRIGGER_STOP: |
|
amdtp_stream_pcm_trigger(&motu->tx_stream, NULL); |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
static int playback_trigger(struct snd_pcm_substream *substream, int cmd) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
|
|
switch (cmd) { |
|
case SNDRV_PCM_TRIGGER_START: |
|
amdtp_stream_pcm_trigger(&motu->rx_stream, substream); |
|
break; |
|
case SNDRV_PCM_TRIGGER_STOP: |
|
amdtp_stream_pcm_trigger(&motu->rx_stream, NULL); |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static snd_pcm_uframes_t capture_pointer(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
|
|
return amdtp_domain_stream_pcm_pointer(&motu->domain, &motu->tx_stream); |
|
} |
|
static snd_pcm_uframes_t playback_pointer(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
|
|
return amdtp_domain_stream_pcm_pointer(&motu->domain, &motu->rx_stream); |
|
} |
|
|
|
static int capture_ack(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
|
|
return amdtp_domain_stream_pcm_ack(&motu->domain, &motu->tx_stream); |
|
} |
|
|
|
static int playback_ack(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_motu *motu = substream->private_data; |
|
|
|
return amdtp_domain_stream_pcm_ack(&motu->domain, &motu->rx_stream); |
|
} |
|
|
|
int snd_motu_create_pcm_devices(struct snd_motu *motu) |
|
{ |
|
static const struct snd_pcm_ops capture_ops = { |
|
.open = pcm_open, |
|
.close = pcm_close, |
|
.hw_params = pcm_hw_params, |
|
.hw_free = pcm_hw_free, |
|
.prepare = capture_prepare, |
|
.trigger = capture_trigger, |
|
.pointer = capture_pointer, |
|
.ack = capture_ack, |
|
}; |
|
static const struct snd_pcm_ops playback_ops = { |
|
.open = pcm_open, |
|
.close = pcm_close, |
|
.hw_params = pcm_hw_params, |
|
.hw_free = pcm_hw_free, |
|
.prepare = playback_prepare, |
|
.trigger = playback_trigger, |
|
.pointer = playback_pointer, |
|
.ack = playback_ack, |
|
}; |
|
struct snd_pcm *pcm; |
|
int err; |
|
|
|
err = snd_pcm_new(motu->card, motu->card->driver, 0, 1, 1, &pcm); |
|
if (err < 0) |
|
return err; |
|
pcm->private_data = motu; |
|
strcpy(pcm->name, motu->card->shortname); |
|
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); |
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); |
|
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0); |
|
|
|
return 0; |
|
}
|
|
|