410 строки
9.8 KiB
C
410 строки
9.8 KiB
C
/*
|
|
* ff-pcm.c - a part of driver for RME Fireface series
|
|
*
|
|
* Copyright (c) 2015-2017 Takashi Sakamoto
|
|
*
|
|
* Licensed under the terms of the GNU General Public License, version 2.
|
|
*/
|
|
|
|
#include "ff.h"
|
|
|
|
static inline unsigned int get_multiplier_mode_with_index(unsigned int index)
|
|
{
|
|
return ((int)index - 1) / 2;
|
|
}
|
|
|
|
static int hw_rule_rate(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
const unsigned int *pcm_channels = rule->private;
|
|
struct snd_interval *r =
|
|
hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
|
|
const struct snd_interval *c =
|
|
hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
|
|
struct snd_interval t = {
|
|
.min = UINT_MAX, .max = 0, .integer = 1
|
|
};
|
|
unsigned int i, mode;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
|
|
mode = get_multiplier_mode_with_index(i);
|
|
if (!snd_interval_test(c, pcm_channels[mode]))
|
|
continue;
|
|
|
|
t.min = min(t.min, amdtp_rate_table[i]);
|
|
t.max = max(t.max, amdtp_rate_table[i]);
|
|
}
|
|
|
|
return snd_interval_refine(r, &t);
|
|
}
|
|
|
|
static int hw_rule_channels(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
const unsigned int *pcm_channels = rule->private;
|
|
struct snd_interval *c =
|
|
hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
|
|
const struct snd_interval *r =
|
|
hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
|
|
struct snd_interval t = {
|
|
.min = UINT_MAX, .max = 0, .integer = 1
|
|
};
|
|
unsigned int i, mode;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
|
|
mode = get_multiplier_mode_with_index(i);
|
|
if (!snd_interval_test(r, amdtp_rate_table[i]))
|
|
continue;
|
|
|
|
t.min = min(t.min, pcm_channels[mode]);
|
|
t.max = max(t.max, pcm_channels[mode]);
|
|
}
|
|
|
|
return snd_interval_refine(c, &t);
|
|
}
|
|
|
|
static void limit_channels_and_rates(struct snd_pcm_hardware *hw,
|
|
const unsigned int *pcm_channels)
|
|
{
|
|
unsigned int mode;
|
|
unsigned int rate, channels;
|
|
int i;
|
|
|
|
hw->channels_min = UINT_MAX;
|
|
hw->channels_max = 0;
|
|
hw->rate_min = UINT_MAX;
|
|
hw->rate_max = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
|
|
mode = get_multiplier_mode_with_index(i);
|
|
|
|
channels = pcm_channels[mode];
|
|
if (pcm_channels[mode] == 0)
|
|
continue;
|
|
hw->channels_min = min(hw->channels_min, channels);
|
|
hw->channels_max = max(hw->channels_max, channels);
|
|
|
|
rate = amdtp_rate_table[i];
|
|
hw->rates |= snd_pcm_rate_to_rate_bit(rate);
|
|
hw->rate_min = min(hw->rate_min, rate);
|
|
hw->rate_max = max(hw->rate_max, rate);
|
|
}
|
|
}
|
|
|
|
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; /* bytes 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 pcm_init_hw_params(struct snd_ff *ff,
|
|
struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct amdtp_stream *s;
|
|
const unsigned int *pcm_channels;
|
|
int err;
|
|
|
|
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 = SNDRV_PCM_FMTBIT_S32;
|
|
s = &ff->tx_stream;
|
|
pcm_channels = ff->spec->pcm_capture_channels;
|
|
} else {
|
|
runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
|
|
s = &ff->rx_stream;
|
|
pcm_channels = ff->spec->pcm_playback_channels;
|
|
}
|
|
|
|
/* limit rates */
|
|
limit_channels_and_rates(&runtime->hw, pcm_channels);
|
|
limit_period_and_buffer(&runtime->hw);
|
|
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
|
|
hw_rule_channels, (void *)pcm_channels,
|
|
SNDRV_PCM_HW_PARAM_RATE, -1);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
|
|
hw_rule_rate, (void *)pcm_channels,
|
|
SNDRV_PCM_HW_PARAM_CHANNELS, -1);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return amdtp_ff_add_pcm_hw_constraints(s, runtime);
|
|
}
|
|
|
|
static int pcm_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_ff *ff = substream->private_data;
|
|
unsigned int rate;
|
|
enum snd_ff_clock_src src;
|
|
int i, err;
|
|
|
|
err = snd_ff_stream_lock_try(ff);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = pcm_init_hw_params(ff, substream);
|
|
if (err < 0) {
|
|
snd_ff_stream_lock_release(ff);
|
|
return err;
|
|
}
|
|
|
|
err = ff->spec->protocol->get_clock(ff, &rate, &src);
|
|
if (err < 0) {
|
|
snd_ff_stream_lock_release(ff);
|
|
return err;
|
|
}
|
|
|
|
if (src != SND_FF_CLOCK_SRC_INTERNAL) {
|
|
for (i = 0; i < CIP_SFC_COUNT; ++i) {
|
|
if (amdtp_rate_table[i] == rate)
|
|
break;
|
|
}
|
|
/*
|
|
* The unit is configured at sampling frequency which packet
|
|
* streaming engine can't support.
|
|
*/
|
|
if (i >= CIP_SFC_COUNT) {
|
|
snd_ff_stream_lock_release(ff);
|
|
return -EIO;
|
|
}
|
|
|
|
substream->runtime->hw.rate_min = rate;
|
|
substream->runtime->hw.rate_max = rate;
|
|
} else {
|
|
if (amdtp_stream_pcm_running(&ff->rx_stream) ||
|
|
amdtp_stream_pcm_running(&ff->tx_stream)) {
|
|
rate = amdtp_rate_table[ff->rx_stream.sfc];
|
|
substream->runtime->hw.rate_min = rate;
|
|
substream->runtime->hw.rate_max = rate;
|
|
}
|
|
}
|
|
|
|
snd_pcm_set_sync(substream);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pcm_close(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_ff *ff = substream->private_data;
|
|
|
|
snd_ff_stream_lock_release(ff);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *hw_params)
|
|
{
|
|
struct snd_ff *ff = 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) {
|
|
mutex_lock(&ff->mutex);
|
|
ff->substreams_counter++;
|
|
mutex_unlock(&ff->mutex);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *hw_params)
|
|
{
|
|
struct snd_ff *ff = 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) {
|
|
mutex_lock(&ff->mutex);
|
|
ff->substreams_counter++;
|
|
mutex_unlock(&ff->mutex);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_ff *ff = substream->private_data;
|
|
|
|
mutex_lock(&ff->mutex);
|
|
|
|
if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
|
|
ff->substreams_counter--;
|
|
|
|
snd_ff_stream_stop_duplex(ff);
|
|
|
|
mutex_unlock(&ff->mutex);
|
|
|
|
return snd_pcm_lib_free_vmalloc_buffer(substream);
|
|
}
|
|
|
|
static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_ff *ff = substream->private_data;
|
|
|
|
mutex_lock(&ff->mutex);
|
|
|
|
if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
|
|
ff->substreams_counter--;
|
|
|
|
snd_ff_stream_stop_duplex(ff);
|
|
|
|
mutex_unlock(&ff->mutex);
|
|
|
|
return snd_pcm_lib_free_vmalloc_buffer(substream);
|
|
}
|
|
|
|
static int pcm_capture_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_ff *ff = substream->private_data;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
int err;
|
|
|
|
mutex_lock(&ff->mutex);
|
|
|
|
err = snd_ff_stream_start_duplex(ff, runtime->rate);
|
|
if (err >= 0)
|
|
amdtp_stream_pcm_prepare(&ff->tx_stream);
|
|
|
|
mutex_unlock(&ff->mutex);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int pcm_playback_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_ff *ff = substream->private_data;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
int err;
|
|
|
|
mutex_lock(&ff->mutex);
|
|
|
|
err = snd_ff_stream_start_duplex(ff, runtime->rate);
|
|
if (err >= 0)
|
|
amdtp_stream_pcm_prepare(&ff->rx_stream);
|
|
|
|
mutex_unlock(&ff->mutex);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_ff *ff = substream->private_data;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
amdtp_stream_pcm_trigger(&ff->tx_stream, substream);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
amdtp_stream_pcm_trigger(&ff->tx_stream, NULL);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_ff *ff = substream->private_data;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
amdtp_stream_pcm_trigger(&ff->rx_stream, substream);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
amdtp_stream_pcm_trigger(&ff->rx_stream, NULL);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
|
|
{
|
|
struct snd_ff *ff = sbstrm->private_data;
|
|
|
|
return amdtp_stream_pcm_pointer(&ff->tx_stream);
|
|
}
|
|
|
|
static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
|
|
{
|
|
struct snd_ff *ff = sbstrm->private_data;
|
|
|
|
return amdtp_stream_pcm_pointer(&ff->rx_stream);
|
|
}
|
|
|
|
static struct snd_pcm_ops pcm_capture_ops = {
|
|
.open = pcm_open,
|
|
.close = pcm_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.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,
|
|
};
|
|
|
|
static struct snd_pcm_ops pcm_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,
|
|
};
|
|
|
|
int snd_ff_create_pcm_devices(struct snd_ff *ff)
|
|
{
|
|
struct snd_pcm *pcm;
|
|
int err;
|
|
|
|
err = snd_pcm_new(ff->card, ff->card->driver, 0, 1, 1, &pcm);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
pcm->private_data = ff;
|
|
snprintf(pcm->name, sizeof(pcm->name),
|
|
"%s PCM", ff->card->shortname);
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops);
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
|
|
|
|
return 0;
|
|
}
|