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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 firewave_rate_constraint(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
static unsigned int stereo_rates[] = { 48000, 96000 };
struct snd_interval *channels =
hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
struct snd_interval *rate =
hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
/* two channels work only at 48/96 kHz */
if (snd_interval_max(channels) < 6)
return snd_interval_list(rate, 2, stereo_rates, 0);
return 0;
}
static int firewave_channels_constraint(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
static const struct snd_interval all_channels = { .min = 6, .max = 6 };
struct snd_interval *rate =
hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
struct snd_interval *channels =
hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
/* 32/44.1 kHz work only with all six channels */
if (snd_interval_max(rate) < 48000)
return snd_interval_refine(channels, &all_channels);
return 0;
}
int firewave_constraints(struct snd_pcm_runtime *runtime)
{
static unsigned int channels_list[] = { 2, 6 };
static struct snd_pcm_hw_constraint_list channels_list_constraint = {
.count = 2,
.list = channels_list,
};
int err;
runtime->hw.rates = SNDRV_PCM_RATE_32000 |
SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_96000;
runtime->hw.channels_max = 6;
err = snd_pcm_hw_constraint_list(runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS,
&channels_list_constraint);
if (err < 0)
return err;
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
firewave_rate_constraint, NULL,
SNDRV_PCM_HW_PARAM_CHANNELS, -1);
if (err < 0)
return err;
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
firewave_channels_constraint, NULL,
SNDRV_PCM_HW_PARAM_RATE, -1);
if (err < 0)
return err;
return 0;
}
int lacie_speakers_constraints(struct snd_pcm_runtime *runtime)
{
runtime->hw.rates = SNDRV_PCM_RATE_32000 |
SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000;
return 0;
}
static int pcm_open(struct snd_pcm_substream *substream)
{
static const struct snd_pcm_hardware hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER,
.formats = AMDTP_OUT_PCM_FORMAT_BITS,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = 4 * 1024 * 1024,
.period_bytes_min = 1,
.period_bytes_max = UINT_MAX,
.periods_min = 1,
.periods_max = UINT_MAX,
};
struct snd_oxfw *oxfw = substream->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
bool used;
int err;
err = cmp_connection_check_used(&oxfw->in_conn, &used);
if ((err < 0) || used)
goto end;
runtime->hw = hardware;
err = oxfw->device_info->pcm_constraints(runtime);
if (err < 0)
goto end;
err = snd_pcm_limit_hw_rates(runtime);
if (err < 0)
goto end;
err = amdtp_stream_add_pcm_hw_constraints(&oxfw->rx_stream, runtime);
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;
int err;
mutex_lock(&oxfw->mutex);
snd_oxfw_stream_stop_simplex(oxfw);
err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
params_buffer_bytes(hw_params));
if (err < 0)
goto error;
amdtp_stream_set_parameters(&oxfw->rx_stream,
params_rate(hw_params),
params_channels(hw_params),
0);
amdtp_stream_set_pcm_format(&oxfw->rx_stream,
params_format(hw_params));
err = avc_general_set_sig_fmt(oxfw->unit, params_rate(hw_params),
AVC_GENERAL_PLUG_DIR_IN, 0);
if (err < 0) {
dev_err(&oxfw->unit->device, "failed to set sample rate\n");
goto err_buffer;
}
return 0;
err_buffer:
snd_pcm_lib_free_vmalloc_buffer(substream);
error:
mutex_unlock(&oxfw->mutex);
return err;
}
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;
int err;
mutex_lock(&oxfw->mutex);
snd_oxfw_stream_stop_simplex(oxfw);
err = snd_oxfw_stream_start_simplex(oxfw);
if (err < 0)
goto end;
amdtp_stream_pcm_prepare(&oxfw->rx_stream);
end:
mutex_unlock(&oxfw->mutex);
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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