428 lines
11 KiB
C
428 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* dice_pcm.c - a part of driver for DICE based devices
|
|
*
|
|
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
|
|
* Copyright (c) 2014 Takashi Sakamoto <o-takashi@sakamocchi.jp>
|
|
*/
|
|
|
|
#include "dice.h"
|
|
|
|
static int dice_rate_constraint(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_pcm_substream *substream = rule->private;
|
|
struct snd_dice *dice = substream->private_data;
|
|
unsigned int index = substream->pcm->device;
|
|
|
|
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 *pcm_channels;
|
|
enum snd_dice_rate_mode mode;
|
|
unsigned int i, rate;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
pcm_channels = dice->tx_pcm_chs[index];
|
|
else
|
|
pcm_channels = dice->rx_pcm_chs[index];
|
|
|
|
for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
|
|
rate = snd_dice_rates[i];
|
|
if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
|
|
continue;
|
|
|
|
if (!snd_interval_test(c, pcm_channels[mode]))
|
|
continue;
|
|
|
|
rates.min = min(rates.min, rate);
|
|
rates.max = max(rates.max, rate);
|
|
}
|
|
|
|
return snd_interval_refine(r, &rates);
|
|
}
|
|
|
|
static int dice_channels_constraint(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_pcm_substream *substream = rule->private;
|
|
struct snd_dice *dice = substream->private_data;
|
|
unsigned int index = substream->pcm->device;
|
|
|
|
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 *pcm_channels;
|
|
enum snd_dice_rate_mode mode;
|
|
unsigned int i, rate;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
pcm_channels = dice->tx_pcm_chs[index];
|
|
else
|
|
pcm_channels = dice->rx_pcm_chs[index];
|
|
|
|
for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
|
|
rate = snd_dice_rates[i];
|
|
if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
|
|
continue;
|
|
|
|
if (!snd_interval_test(r, rate))
|
|
continue;
|
|
|
|
channels.min = min(channels.min, pcm_channels[mode]);
|
|
channels.max = max(channels.max, pcm_channels[mode]);
|
|
}
|
|
|
|
return snd_interval_refine(c, &channels);
|
|
}
|
|
|
|
static int limit_channels_and_rates(struct snd_dice *dice,
|
|
struct snd_pcm_runtime *runtime,
|
|
enum amdtp_stream_direction dir,
|
|
unsigned int index)
|
|
{
|
|
struct snd_pcm_hardware *hw = &runtime->hw;
|
|
unsigned int *pcm_channels;
|
|
unsigned int i;
|
|
|
|
if (dir == AMDTP_IN_STREAM)
|
|
pcm_channels = dice->tx_pcm_chs[index];
|
|
else
|
|
pcm_channels = dice->rx_pcm_chs[index];
|
|
|
|
hw->channels_min = UINT_MAX;
|
|
hw->channels_max = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
|
|
enum snd_dice_rate_mode mode;
|
|
unsigned int rate, channels;
|
|
|
|
rate = snd_dice_rates[i];
|
|
if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
|
|
continue;
|
|
hw->rates |= snd_pcm_rate_to_rate_bit(rate);
|
|
|
|
channels = pcm_channels[mode];
|
|
if (channels == 0)
|
|
continue;
|
|
hw->channels_min = min(hw->channels_min, channels);
|
|
hw->channels_max = max(hw->channels_max, channels);
|
|
}
|
|
|
|
snd_pcm_limit_hw_rates(runtime);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int init_hw_info(struct snd_dice *dice,
|
|
struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct snd_pcm_hardware *hw = &runtime->hw;
|
|
unsigned int index = substream->pcm->device;
|
|
enum amdtp_stream_direction dir;
|
|
struct amdtp_stream *stream;
|
|
int err;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
|
|
hw->formats = AM824_IN_PCM_FORMAT_BITS;
|
|
dir = AMDTP_IN_STREAM;
|
|
stream = &dice->tx_stream[index];
|
|
} else {
|
|
hw->formats = AM824_OUT_PCM_FORMAT_BITS;
|
|
dir = AMDTP_OUT_STREAM;
|
|
stream = &dice->rx_stream[index];
|
|
}
|
|
|
|
err = limit_channels_and_rates(dice, substream->runtime, dir,
|
|
index);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
|
|
dice_rate_constraint, substream,
|
|
SNDRV_PCM_HW_PARAM_CHANNELS, -1);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
|
|
dice_channels_constraint, substream,
|
|
SNDRV_PCM_HW_PARAM_RATE, -1);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return amdtp_am824_add_pcm_hw_constraints(stream, runtime);
|
|
}
|
|
|
|
static int pcm_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
unsigned int source;
|
|
bool internal;
|
|
int err;
|
|
|
|
err = snd_dice_stream_lock_try(dice);
|
|
if (err < 0)
|
|
goto end;
|
|
|
|
err = init_hw_info(dice, substream);
|
|
if (err < 0)
|
|
goto err_locked;
|
|
|
|
err = snd_dice_transaction_get_clock_source(dice, &source);
|
|
if (err < 0)
|
|
goto err_locked;
|
|
switch (source) {
|
|
case CLOCK_SOURCE_AES1:
|
|
case CLOCK_SOURCE_AES2:
|
|
case CLOCK_SOURCE_AES3:
|
|
case CLOCK_SOURCE_AES4:
|
|
case CLOCK_SOURCE_AES_ANY:
|
|
case CLOCK_SOURCE_ADAT:
|
|
case CLOCK_SOURCE_TDIF:
|
|
case CLOCK_SOURCE_WC:
|
|
internal = false;
|
|
break;
|
|
default:
|
|
internal = true;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* When source of clock is not internal or any PCM streams are running,
|
|
* available sampling rate is limited at current sampling rate.
|
|
*/
|
|
if (!internal ||
|
|
amdtp_stream_pcm_running(&dice->tx_stream[0]) ||
|
|
amdtp_stream_pcm_running(&dice->tx_stream[1]) ||
|
|
amdtp_stream_pcm_running(&dice->rx_stream[0]) ||
|
|
amdtp_stream_pcm_running(&dice->rx_stream[1])) {
|
|
unsigned int rate;
|
|
|
|
err = snd_dice_transaction_get_rate(dice, &rate);
|
|
if (err < 0)
|
|
goto err_locked;
|
|
substream->runtime->hw.rate_min = rate;
|
|
substream->runtime->hw.rate_max = rate;
|
|
}
|
|
|
|
snd_pcm_set_sync(substream);
|
|
end:
|
|
return err;
|
|
err_locked:
|
|
snd_dice_stream_lock_release(dice);
|
|
return err;
|
|
}
|
|
|
|
static int pcm_close(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
|
|
snd_dice_stream_lock_release(dice);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pcm_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *hw_params)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
int err;
|
|
|
|
err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
|
|
params_buffer_bytes(hw_params));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
|
|
unsigned int rate = params_rate(hw_params);
|
|
|
|
mutex_lock(&dice->mutex);
|
|
err = snd_dice_stream_reserve_duplex(dice, rate);
|
|
if (err >= 0)
|
|
++dice->substreams_counter;
|
|
mutex_unlock(&dice->mutex);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int pcm_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
|
|
mutex_lock(&dice->mutex);
|
|
|
|
if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
|
|
--dice->substreams_counter;
|
|
|
|
snd_dice_stream_stop_duplex(dice);
|
|
|
|
mutex_unlock(&dice->mutex);
|
|
|
|
return snd_pcm_lib_free_vmalloc_buffer(substream);
|
|
}
|
|
|
|
static int capture_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
|
|
int err;
|
|
|
|
mutex_lock(&dice->mutex);
|
|
err = snd_dice_stream_start_duplex(dice);
|
|
mutex_unlock(&dice->mutex);
|
|
if (err >= 0)
|
|
amdtp_stream_pcm_prepare(stream);
|
|
|
|
return 0;
|
|
}
|
|
static int playback_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
|
|
int err;
|
|
|
|
mutex_lock(&dice->mutex);
|
|
err = snd_dice_stream_start_duplex(dice);
|
|
mutex_unlock(&dice->mutex);
|
|
if (err >= 0)
|
|
amdtp_stream_pcm_prepare(stream);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int capture_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
amdtp_stream_pcm_trigger(stream, substream);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
amdtp_stream_pcm_trigger(stream, NULL);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
static int playback_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
amdtp_stream_pcm_trigger(stream, substream);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
amdtp_stream_pcm_trigger(stream, NULL);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static snd_pcm_uframes_t capture_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
|
|
|
|
return amdtp_stream_pcm_pointer(stream);
|
|
}
|
|
static snd_pcm_uframes_t playback_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
|
|
|
|
return amdtp_stream_pcm_pointer(stream);
|
|
}
|
|
|
|
static int capture_ack(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
|
|
|
|
return amdtp_stream_pcm_ack(stream);
|
|
}
|
|
|
|
static int playback_ack(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dice *dice = substream->private_data;
|
|
struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
|
|
|
|
return amdtp_stream_pcm_ack(stream);
|
|
}
|
|
|
|
int snd_dice_create_pcm(struct snd_dice *dice)
|
|
{
|
|
static const 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 = capture_prepare,
|
|
.trigger = capture_trigger,
|
|
.pointer = capture_pointer,
|
|
.ack = capture_ack,
|
|
.page = snd_pcm_lib_get_vmalloc_page,
|
|
};
|
|
static const struct snd_pcm_ops playback_ops = {
|
|
.open = pcm_open,
|
|
.close = pcm_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = pcm_hw_params,
|
|
.hw_free = pcm_hw_free,
|
|
.prepare = playback_prepare,
|
|
.trigger = playback_trigger,
|
|
.pointer = playback_pointer,
|
|
.ack = playback_ack,
|
|
.page = snd_pcm_lib_get_vmalloc_page,
|
|
};
|
|
struct snd_pcm *pcm;
|
|
unsigned int capture, playback;
|
|
int i, j;
|
|
int err;
|
|
|
|
for (i = 0; i < MAX_STREAMS; i++) {
|
|
capture = playback = 0;
|
|
for (j = 0; j < SND_DICE_RATE_MODE_COUNT; ++j) {
|
|
if (dice->tx_pcm_chs[i][j] > 0)
|
|
capture = 1;
|
|
if (dice->rx_pcm_chs[i][j] > 0)
|
|
playback = 1;
|
|
}
|
|
|
|
err = snd_pcm_new(dice->card, "DICE", i, playback, capture,
|
|
&pcm);
|
|
if (err < 0)
|
|
return err;
|
|
pcm->private_data = dice;
|
|
strcpy(pcm->name, dice->card->shortname);
|
|
|
|
if (capture > 0)
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
|
|
&capture_ops);
|
|
|
|
if (playback > 0)
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
|
|
&playback_ops);
|
|
}
|
|
|
|
return 0;
|
|
}
|