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/*
* oxfw_pcm.c - a part of driver for OXFW970/971 based devices
*
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "oxfw.h"
static int hw_rule_rate(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
u8 **formats = 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
};
struct snd_oxfw_stream_formation formation;
unsigned int i, err;
for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
if (formats[i] == NULL)
continue;
err = snd_oxfw_stream_parse_format(formats[i], &formation);
if (err < 0)
continue;
if (!snd_interval_test(c, formation.pcm))
continue;
t.min = min(t.min, formation.rate);
t.max = max(t.max, formation.rate);
}
return snd_interval_refine(r, &t);
}
static int hw_rule_channels(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
u8 **formats = 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_oxfw_stream_formation formation;
unsigned int i, j, err;
unsigned int count, list[SND_OXFW_STREAM_FORMAT_ENTRIES] = {0};
count = 0;
for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
if (formats[i] == NULL)
break;
err = snd_oxfw_stream_parse_format(formats[i], &formation);
if (err < 0)
continue;
if (!snd_interval_test(r, formation.rate))
continue;
if (list[count] == formation.pcm)
continue;
for (j = 0; j < ARRAY_SIZE(list); j++) {
if (list[j] == formation.pcm)
break;
}
if (j == ARRAY_SIZE(list)) {
list[count] = formation.pcm;
if (++count == ARRAY_SIZE(list))
break;
}
}
return snd_interval_list(c, count, list, 0);
}
static void limit_channels_and_rates(struct snd_pcm_hardware *hw, u8 **formats)
{
struct snd_oxfw_stream_formation formation;
unsigned int i, err;
hw->channels_min = UINT_MAX;
hw->channels_max = 0;
hw->rate_min = UINT_MAX;
hw->rate_max = 0;
hw->rates = 0;
for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
if (formats[i] == NULL)
break;
err = snd_oxfw_stream_parse_format(formats[i], &formation);
if (err < 0)
continue;
hw->channels_min = min(hw->channels_min, formation.pcm);
hw->channels_max = max(hw->channels_max, formation.pcm);
hw->rate_min = min(hw->rate_min, formation.rate);
hw->rate_max = max(hw->rate_max, formation.rate);
hw->rates |= snd_pcm_rate_to_rate_bit(formation.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_open(struct snd_pcm_substream *substream)
{
struct snd_oxfw *oxfw = substream->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
u8 **formats;
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_MMAP |
SNDRV_PCM_INFO_MMAP_VALID;
limit_channels_and_rates(&runtime->hw, formats);
limit_period_and_buffer(&runtime->hw);
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
hw_rule_channels, formats,
SNDRV_PCM_HW_PARAM_RATE, -1);
if (err < 0)
goto end;
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
hw_rule_rate, formats,
SNDRV_PCM_HW_PARAM_CHANNELS, -1);
if (err < 0)
goto end;
err = amdtp_stream_add_pcm_hw_constraints(&oxfw->rx_stream, runtime);
if (err < 0)
goto end;
snd_pcm_set_sync(substream);
end:
return err;
}
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)
{
struct snd_oxfw *oxfw = substream->private_data;
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)
{
struct snd_oxfw *oxfw = substream->private_data;
mutex_lock(&oxfw->mutex);
snd_oxfw_stream_stop_simplex(oxfw);
mutex_unlock(&oxfw->mutex);
return snd_pcm_lib_free_vmalloc_buffer(substream);
}
static int pcm_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, runtime->rate,
runtime->channels);
mutex_unlock(&oxfw->mutex);
if (err < 0)
goto end;
amdtp_stream_pcm_prepare(&oxfw->rx_stream);
end:
return err;
}
static int pcm_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->rx_stream, pcm);
return 0;
}
static snd_pcm_uframes_t pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_oxfw *oxfw = substream->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 = {
.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,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
struct snd_pcm *pcm;
int err;
err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, 0, &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);
return 0;
}
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