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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Date Author Notes
* 2019-07-23 Zero-Free first implementation
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <drv_sound.h>
#include <drv_pl041.h>
#include <drv_ac97.h>
#define DBG_TAG "drv.sound"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#define TX_FIFO_SIZE (3840)
struct sound_device
{
struct rt_audio_device audio;
struct rt_audio_configure replay_config;
rt_uint8_t *tx_fifo;
rt_uint8_t volume;
};
static struct sound_device snd_dev = {0};
static void rt_hw_aaci_isr(rt_uint32_t status, void *user_data)
{
if (status & AACI_SR_TXHE)
{
rt_audio_tx_complete(&snd_dev.audio);
}
}
static rt_err_t sound_getcaps(struct rt_audio_device *audio, struct rt_audio_caps *caps)
{
rt_err_t result = RT_EOK;
struct sound_device *snd_dev;
RT_ASSERT(audio != RT_NULL);
snd_dev = (struct sound_device *)audio->parent.user_data;
switch (caps->main_type)
{
case AUDIO_TYPE_QUERY: /* qurey the types of hw_codec device */
{
switch (caps->sub_type)
{
case AUDIO_TYPE_QUERY:
caps->udata.mask = AUDIO_TYPE_OUTPUT | AUDIO_TYPE_MIXER;
break;
default:
result = -RT_ERROR;
break;
}
break;
}
case AUDIO_TYPE_OUTPUT: /* Provide capabilities of OUTPUT unit */
{
switch (caps->sub_type)
{
case AUDIO_DSP_PARAM:
caps->udata.config.samplerate = snd_dev->replay_config.samplerate;
caps->udata.config.channels = snd_dev->replay_config.channels;
caps->udata.config.samplebits = snd_dev->replay_config.samplebits;
break;
case AUDIO_DSP_SAMPLERATE:
caps->udata.config.samplerate = snd_dev->replay_config.samplerate;
break;
case AUDIO_DSP_CHANNELS:
caps->udata.config.channels = snd_dev->replay_config.channels;
break;
case AUDIO_DSP_SAMPLEBITS:
caps->udata.config.samplebits = snd_dev->replay_config.samplebits;
break;
default:
result = -RT_ERROR;
break;
}
break;
}
case AUDIO_TYPE_MIXER: /* report the Mixer Units */
{
switch (caps->sub_type)
{
case AUDIO_MIXER_QUERY:
caps->udata.mask = AUDIO_MIXER_VOLUME;
break;
case AUDIO_MIXER_VOLUME:
caps->udata.value = snd_dev->volume;
break;
default:
result = -RT_ERROR;
break;
}
break;
}
default:
result = -RT_ERROR;
break;
}
return result;
}
static rt_err_t sound_configure(struct rt_audio_device *audio, struct rt_audio_caps *caps)
{
rt_err_t result = RT_EOK;
struct sound_device *snd_dev;
struct rt_audio_replay *replay;
RT_ASSERT(audio != RT_NULL);
snd_dev = (struct sound_device *)audio->parent.user_data;
switch (caps->main_type)
{
case AUDIO_TYPE_MIXER:
{
switch (caps->sub_type)
{
case AUDIO_MIXER_VOLUME:
{
rt_uint8_t volume = caps->udata.value;
snd_dev->volume = volume;
ac97_set_vol(volume);
LOG_I("set volume %d", volume);
break;
}
default:
result = -RT_ERROR;
break;
}
break;
}
case AUDIO_TYPE_OUTPUT:
{
switch (caps->sub_type)
{
case AUDIO_DSP_PARAM:
{
/* set samplerate */
ac97_set_rate(caps->udata.config.samplerate);
/* update buffer fifo informaition according samplerate */
replay = snd_dev->audio.replay;
replay->buf_info.total_size = caps->udata.config.samplerate / 50 * 4;
replay->buf_info.block_size = replay->buf_info.total_size / 2;
/* save configs */
snd_dev->replay_config.samplerate = caps->udata.config.samplerate;
snd_dev->replay_config.channels = caps->udata.config.channels;
snd_dev->replay_config.samplebits = caps->udata.config.samplebits;
LOG_D("set samplerate %d", snd_dev->replay_config.samplerate);
break;
}
case AUDIO_DSP_SAMPLERATE:
{
ac97_set_rate(caps->udata.config.samplerate);
snd_dev->replay_config.samplerate = caps->udata.config.samplerate;
LOG_D("set samplerate %d", snd_dev->replay_config.samplerate);
break;
}
case AUDIO_DSP_CHANNELS:
{
/* not support */
snd_dev->replay_config.channels = caps->udata.config.channels;
LOG_D("set channels %d", snd_dev->replay_config.channels);
break;
}
case AUDIO_DSP_SAMPLEBITS:
{
/* not support */
snd_dev->replay_config.samplebits = caps->udata.config.samplebits;
break;
}
default:
result = -RT_ERROR;
break;
}
break;
}
default:
break;
}
return result;
}
static rt_err_t sound_init(struct rt_audio_device *audio)
{
rt_err_t result = RT_EOK;
struct sound_device *snd_dev;
struct pl041_cfg _cfg;
RT_ASSERT(audio != RT_NULL);
snd_dev = (struct sound_device *)audio->parent.user_data;
aaci_pl041_init();
_cfg.itype = PL041_CHANNEL_LEFT_ADC | PL041_CHANNEL_RIGHT_ADC;
_cfg.otype = PL041_CHANNEL_LEFT_DAC | PL041_CHANNEL_RIGHT_DAC;
_cfg.vol = snd_dev->volume;
_cfg.rate = snd_dev->replay_config.samplerate;
ac97_reset();
aaci_pl041_channel_cfg(0, &_cfg);
aaci_pl041_irq_register(0, rt_hw_aaci_isr, RT_NULL);
return result;
}
static rt_err_t sound_start(struct rt_audio_device *audio, int stream)
{
RT_ASSERT(audio != RT_NULL);
if (stream == AUDIO_STREAM_REPLAY)
{
LOG_D("open sound device");
aaci_pl041_channel_enable(0);
aaci_pl041_irq_enable(0, AACI_IE_UR | AACI_IE_TX | AACI_IE_TXC);
}
return RT_EOK;
}
static rt_err_t sound_stop(struct rt_audio_device *audio, int stream)
{
RT_ASSERT(audio != RT_NULL);
if (stream == AUDIO_STREAM_REPLAY)
{
/* wait codec free */
rt_thread_mdelay(100);
/* disable irq and channels 0 */
aaci_pl041_irq_disable(0, AACI_IE_UR | AACI_IE_TX | AACI_IE_TXC);
aaci_pl041_channel_disable(0);
LOG_D("close sound device");
}
return RT_EOK;
}
static void sound_buffer_info(struct rt_audio_device *audio, struct rt_audio_buf_info *info)
{
struct sound_device *snd_dev;
RT_ASSERT(audio != RT_NULL);
snd_dev = (struct sound_device *)audio->parent.user_data;
/**
* TX_FIFO
* +----------------+----------------+
* | block1 | block2 |
* +----------------+----------------+
* \ block_size /
*/
info->buffer = snd_dev->tx_fifo;
info->total_size = TX_FIFO_SIZE;
info->block_size = TX_FIFO_SIZE/2;
info->block_count = 2;
}
static rt_ssize_t sound_transmit(struct rt_audio_device *audio, const void *writeBuf, void *readBuf, rt_size_t size)
{
RT_ASSERT(audio != RT_NULL);
/* write data to channel_0 fifo */
aaci_pl041_channel_write(0, (rt_uint16_t *)writeBuf, size >> 1);
return size;
}
static struct rt_audio_ops snd_ops =
{
.getcaps = sound_getcaps,
.configure = sound_configure,
.init = sound_init,
.start = sound_start,
.stop = sound_stop,
.transmit = sound_transmit,
.buffer_info = sound_buffer_info,
};
int rt_hw_audio_init(void)
{
rt_uint8_t *tx_fifo;
if (snd_dev.tx_fifo)
return RT_EOK;
tx_fifo = rt_malloc(TX_FIFO_SIZE);
if (tx_fifo == RT_NULL)
return -RT_ENOMEM;
rt_memset(tx_fifo, 0, TX_FIFO_SIZE);
snd_dev.tx_fifo = tx_fifo;
/* init default configuration */
{
snd_dev.replay_config.samplerate = 44100;
snd_dev.replay_config.channels = 2;
snd_dev.replay_config.samplebits = 16;
snd_dev.volume = 55;
}
/* register sound device */
snd_dev.audio.ops = &snd_ops;
rt_audio_register(&snd_dev.audio, "sound0", RT_DEVICE_FLAG_WRONLY, &snd_dev);
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_audio_init);
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