static int pcm_open(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
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;
snd_pcm_set_sync(substream);
end:
return err;
err_locked:
snd_dice_stream_lock_release(dice);
return err;
}
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;
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, rate, mode, *pcm_channels;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
pcm_channels = dice->tx_channels;
else
pcm_channels = dice->rx_channels;
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;
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, rate, mode, *pcm_channels;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
pcm_channels = dice->tx_channels;
else
pcm_channels = dice->rx_channels;
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 void limit_channels_and_rates(struct snd_dice *dice,
struct snd_pcm_runtime *runtime,
unsigned int *pcm_channels)
{
struct snd_pcm_hardware *hw = &runtime->hw;
unsigned int i, rate, mode;
hw->channels_min = UINT_MAX;
hw->channels_max = 0;
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;
hw->rates |= snd_pcm_rate_to_rate_bit(rate);
if (pcm_channels[mode] == 0)
continue;
hw->channels_min = min(hw->channels_min, pcm_channels[mode]);
hw->channels_max = max(hw->channels_max, pcm_channels[mode]);
}
snd_pcm_limit_hw_rates(runtime);
}
static void limit_period_and_buffer(struct snd_pcm_hardware *hw)
{
hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */
hw->periods_max = UINT_MAX;
hw->period_bytes_min = 4 * hw->channels_max; /* byte for a frame */
/* Just to prevent from allocating much pages. */
hw->period_bytes_max = hw->period_bytes_min * 2048;
hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
}
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;
struct amdtp_stream *stream;
unsigned int *pcm_channels;
int err;
hw->info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_JOINT_DUPLEX |
SNDRV_PCM_INFO_BLOCK_TRANSFER;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
hw->formats = AMDTP_IN_PCM_FORMAT_BITS;
stream = &dice->tx_stream;
pcm_channels = dice->tx_channels;
} else {
hw->formats = AMDTP_OUT_PCM_FORMAT_BITS;
stream = &dice->rx_stream;
pcm_channels = dice->rx_channels;
}
limit_channels_and_rates(dice, runtime, pcm_channels);
limit_period_and_buffer(hw);
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)
goto end;
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)
goto end;
err = amdtp_stream_add_pcm_hw_constraints(stream, runtime);
end:
return err;
}
static int pcm_open(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
unsigned int source, rate;
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) ||
amdtp_stream_pcm_running(&dice->rx_stream)) {
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 capture_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_dice *dice = substream->private_data;
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
mutex_lock(&dice->mutex);
dice->substreams_counter++;
mutex_unlock(&dice->mutex);
}
amdtp_stream_set_pcm_format(&dice->tx_stream,
params_format(hw_params));
return snd_pcm_lib_alloc_vmalloc_buffer(substream,
params_buffer_bytes(hw_params));
}
static int playback_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_dice *dice = substream->private_data;
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
mutex_lock(&dice->mutex);
dice->substreams_counter++;
mutex_unlock(&dice->mutex);
}
amdtp_stream_set_pcm_format(&dice->rx_stream,
params_format(hw_params));
return snd_pcm_lib_alloc_vmalloc_buffer(substream,
params_buffer_bytes(hw_params));
}
static int capture_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 playback_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;
int err;
mutex_lock(&dice->mutex);
err = snd_dice_stream_start_duplex(dice, substream->runtime->rate);
mutex_unlock(&dice->mutex);
if (err >= 0)
amdtp_stream_pcm_prepare(&dice->tx_stream);
return 0;
}
static int playback_prepare(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
int err;
mutex_lock(&dice->mutex);
err = snd_dice_stream_start_duplex(dice, substream->runtime->rate);
mutex_unlock(&dice->mutex);
if (err >= 0)
amdtp_stream_pcm_prepare(&dice->rx_stream);
return err;
}
static int capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_dice *dice = substream->private_data;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
amdtp_stream_pcm_trigger(&dice->tx_stream, substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
amdtp_stream_pcm_trigger(&dice->tx_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;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
amdtp_stream_pcm_trigger(&dice->rx_stream, substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
amdtp_stream_pcm_trigger(&dice->rx_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;
return amdtp_stream_pcm_pointer(&dice->tx_stream);
}
static snd_pcm_uframes_t playback_pointer(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
return amdtp_stream_pcm_pointer(&dice->rx_stream);
}
int snd_dice_create_pcm(struct snd_dice *dice)
{
static struct snd_pcm_ops capture_ops = {
.open = pcm_open,
.close = pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = capture_hw_params,
.hw_free = capture_hw_free,
.prepare = capture_prepare,
.trigger = capture_trigger,
.pointer = 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 = playback_hw_params,
.hw_free = playback_hw_free,
.prepare = playback_prepare,
.trigger = playback_trigger,
.pointer = playback_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
struct snd_pcm *pcm;
unsigned int i, capture, playback;
int err;
capture = playback = 0;
for (i = 0; i < 3; i++) {
if (dice->tx_channels[i] > 0)
capture = 1;
if (dice->rx_channels[i] > 0)
playback = 1;
}
err = snd_pcm_new(dice->card, "DICE", 0, 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;
}
