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rt-thread-official/bsp/imxrt/libraries/drivers/drv_sai.c

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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-4-30 misonyo the first version.
*/
#include <rtthread.h>
#include <rthw.h>
#include <rtdef.h>
#ifdef BSP_USING_AUDIO
#define LOG_TAG "drv.sai"
#include <drv_log.h>
#include <rtdevice.h>
#include "drivers/audio.h"
#include "bsp_wm8960.h"
#include "drv_i2c.h"
#include "drv_sai.h"
#define RX_DMA_FIFO_SIZE (2048)
volatile rt_uint16_t rx_busy = 0;
volatile rt_uint16_t tx_busy = 0;
struct drv_sai sai_tx = {0};
struct drv_sai sai_rx = {0};
wm8960_config_t wm8960Config = {
.route = kWM8960_RoutePlaybackandRecord,
.rightInputSource = kWM8960_InputDifferentialMicInput2,
.playSource = kWM8960_PlaySourceDAC,
.slaveAddress = WM8960_I2C_ADDR,
.bus = kWM8960_BusI2S,
.format = {.mclk_HZ = 6144000U, .sampleRate = kWM8960_AudioSampleRate16KHz, .bitWidth = kWM8960_AudioBitWidth16bit},
.master_slave = false,
};
const clock_audio_pll_config_t audioPllConfig =
{
.loopDivider = 32, /* PLL loop divider. Valid range for DIV_SELECT divider value: 27~54. */
.postDivider = 1, /* Divider after the PLL, should only be 1, 2, 4, 8, 16. */
.numerator = 77, /* 30 bit numerator of fractional loop divider. */
.denominator = 100, /* 30 bit denominator of fractional loop divider */
};
sai_transfer_format_t format;
sai_config_t config;
sai_transfer_t xfer;
struct imxrt_sai
{
struct rt_audio_device audio;
struct rt_audio_configure play_config;
rt_uint16_t volume;
rt_uint8_t* tx_fifo;
struct rt_i2c_bus_device* i2c_bus;
rt_uint8_t* rx_fifo;
};
struct imxrt_sai imxrt_payer_dev = { 0 };
static void sai_config(void)
{
#ifdef BSP_AUDIO_USING_DMA
static struct saidma_tx_config sai_txdma = { .channel = 0U, .request = kDmaRequestMuxSai1Tx };
sai_tx.dma_tx = &sai_txdma;
sai_tx.dma_flag |= RT_DEVICE_FLAG_DMA_TX;
#if defined (BSP_USING_AUDIO_RECORD)
static struct saidma_rx_config sai_rxdma = { .channel = 1U, .request = kDmaRequestMuxSai1Rx };
sai_rx.dma_rx = &sai_rxdma;
#endif
#endif
}
static void sai_TxDmaCallback(I2S_Type* base, sai_edma_handle_t* handle, rt_int32_t status, void* userData)
{
tx_busy = 1;
rt_audio_tx_complete(&imxrt_payer_dev.audio);
}
#if defined (BSP_USING_AUDIO_RECORD)
static void sai_RxDmaCallback(I2S_Type* base, sai_edma_handle_t* handle, rt_int32_t status, void* userData)
{
rx_busy = 1;
rt_audio_rx_done(&imxrt_payer_dev.audio, &imxrt_payer_dev.rx_fifo[0], RX_DMA_FIFO_SIZE / 2);
}
#endif
void BOARD_EnableSaiMclkOutput(rt_bool_t enable)
{
if(enable)
{
IOMUXC_GPR->GPR1 |= IOMUXC_GPR_GPR1_SAI1_MCLK_DIR_MASK;
}
else
{
IOMUXC_GPR->GPR1 &= (~IOMUXC_GPR_GPR1_SAI1_MCLK_DIR_MASK);
}
}
void sai_format(void)
{
SAI_TransferTxCreateHandleEDMA(sai_tx.base, &sai_tx.dma_tx->txHandle, sai_TxDmaCallback, NULL, &sai_tx.dma_tx->edma);
SAI_TransferTxSetFormatEDMA(sai_tx.base, &sai_tx.dma_tx->txHandle, &format, DEMO_SAI_CLK_FREQ, DEMO_SAI_CLK_FREQ);
#if defined (BSP_USING_AUDIO_RECORD)
SAI_TransferRxCreateHandleEDMA(sai_rx.base, &sai_rx.dma_rx->rxHandle, sai_RxDmaCallback, NULL, &sai_rx.dma_rx->edma);
SAI_TransferRxSetFormatEDMA(sai_rx.base, &sai_rx.dma_rx->rxHandle, &format, DEMO_SAI_CLK_FREQ, DEMO_SAI_CLK_FREQ);
#endif
}
void sai_init(void)
{
CLOCK_InitAudioPll(&audioPllConfig);
CLOCK_SetMux(kCLOCK_Sai1Mux, DEMO_SAI1_CLOCK_SOURCE_SELECT);
CLOCK_SetDiv(kCLOCK_Sai1PreDiv, DEMO_SAI1_CLOCK_SOURCE_PRE_DIVIDER);
CLOCK_SetDiv(kCLOCK_Sai1Div, DEMO_SAI1_CLOCK_SOURCE_DIVIDER);
BOARD_EnableSaiMclkOutput(RT_TRUE);
EDMA_CreateHandle(&sai_tx.dma_tx->edma, DMA0, sai_tx.dma_tx->channel);
DMAMUX_SetSource(DMAMUX, sai_tx.dma_tx->channel, (rt_uint8_t)sai_tx.dma_tx->request);
DMAMUX_EnableChannel(DMAMUX, sai_tx.dma_tx->channel);
SAI_TxGetDefaultConfig(&config);
SAI_TxInit(sai_tx.base, &config);
#if defined (BSP_USING_AUDIO_RECORD)
EDMA_CreateHandle(&sai_rx.dma_rx->edma, DMA0, sai_rx.dma_rx->channel);
DMAMUX_SetSource(DMAMUX, sai_rx.dma_rx->channel, (rt_uint8_t)sai_rx.dma_rx->request);
DMAMUX_EnableChannel(DMAMUX, sai_rx.dma_rx->channel);
SAI_RxGetDefaultConfig(&config);
SAI_RxInit(sai_rx.base, &config);
#endif
format.bitWidth = kSAI_WordWidth16bits;
format.channel = 0U;
format.sampleRate_Hz = kSAI_SampleRate16KHz;
format.masterClockHz = DEMO_SAI_CLK_FREQ;
format.protocol = config.protocol;
format.stereo = kSAI_Stereo;
format.isFrameSyncCompact = true;
format.watermark = FSL_FEATURE_SAI_FIFO_COUNT / 2U;
SAI_TransferTxCreateHandleEDMA(sai_tx.base, &sai_tx.dma_tx->txHandle, sai_TxDmaCallback, NULL, &sai_tx.dma_tx->edma);
SAI_TransferTxSetFormatEDMA(sai_tx.base, &sai_tx.dma_tx->txHandle, &format, DEMO_SAI_CLK_FREQ, DEMO_SAI_CLK_FREQ);
#if defined (BSP_USING_AUDIO_RECORD)
SAI_TransferRxCreateHandleEDMA(sai_rx.base, &sai_rx.dma_rx->rxHandle, sai_RxDmaCallback, NULL, &sai_rx.dma_rx->edma);
SAI_TransferRxSetFormatEDMA(sai_rx.base, &sai_rx.dma_rx->rxHandle, &format, DEMO_SAI_CLK_FREQ, DEMO_SAI_CLK_FREQ);
#endif
}
void SAI_samplerate_set(rt_uint32_t freq)
{
switch(freq)
{
case 48000:
format.sampleRate_Hz = kSAI_SampleRate48KHz;
break;
case 44100:
format.sampleRate_Hz = kSAI_SampleRate44100Hz;
break;
case 32000:
format.sampleRate_Hz = kSAI_SampleRate32KHz;
break;
case 24000:
format.sampleRate_Hz = kSAI_SampleRate24KHz;
break;
case 22050:
format.sampleRate_Hz = kSAI_SampleRate22050Hz;
break;
case 16000:
format.sampleRate_Hz = kSAI_SampleRate16KHz;
break;
case 12000:
format.sampleRate_Hz = kSAI_SampleRate12KHz;
break;
case 11025:
format.sampleRate_Hz = kSAI_SampleRate11025Hz;
break;
case 8000:
format.sampleRate_Hz = kSAI_SampleRate8KHz;
break;
default:
format.sampleRate_Hz = kSAI_SampleRate16KHz;
break;
}
}
void SAI_channels_set(rt_uint16_t channels)
{
switch(channels)
{
case 2:
format.stereo = kSAI_Stereo;
break;
case 1:
format.stereo = kSAI_MonoRight;
break;
case 0:
format.stereo = kSAI_MonoLeft;
break;
default:
format.stereo = kSAI_Stereo;
break;
}
}
void SAI_samplebits_set(rt_uint16_t samplebits)
{
switch(samplebits)
{
case 16:
format.bitWidth = kSAI_WordWidth16bits;
break;
case 24:
format.bitWidth = kSAI_WordWidth24bits;
break;
case 32:
format.bitWidth = kSAI_WordWidth32bits;
break;
default:
format.bitWidth = kSAI_WordWidth16bits;
break;
}
}
static rt_err_t imxrt_payer_getcaps(struct rt_audio_device* audio, struct rt_audio_caps* caps)
{
rt_err_t result = RT_EOK;
RT_ASSERT(audio != RT_NULL);
struct imxrt_sai* imxrt_audio = (struct imxrt_sai*)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_INPUT:
{
switch(caps->sub_type)
{
case AUDIO_DSP_PARAM:
caps->udata.config.channels = imxrt_audio->play_config.channels;
caps->udata.config.samplebits = imxrt_audio->play_config.samplebits;
caps->udata.config.samplerate = imxrt_audio->play_config.samplerate;
break;
case AUDIO_DSP_SAMPLERATE:
caps->udata.config.samplerate = imxrt_audio->play_config.samplerate;
break;
case AUDIO_DSP_CHANNELS:
caps->udata.config.channels = imxrt_audio->play_config.channels;
break;
case AUDIO_DSP_SAMPLEBITS:
caps->udata.config.samplebits = imxrt_audio->play_config.samplebits;
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 = imxrt_audio->play_config.samplerate;
caps->udata.config.channels = imxrt_audio->play_config.channels;
caps->udata.config.samplebits = imxrt_audio->play_config.samplebits;
break;
case AUDIO_DSP_SAMPLERATE:
caps->udata.config.samplerate = imxrt_audio->play_config.samplerate;
break;
case AUDIO_DSP_CHANNELS:
caps->udata.config.channels = imxrt_audio->play_config.channels;
break;
case AUDIO_DSP_SAMPLEBITS:
caps->udata.config.samplebits = imxrt_audio->play_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 = WM8960_GetVolume(imxrt_payer_dev.i2c_bus,kWM8960_ModuleDAC);
break;
default:
result = -RT_ERROR;
break;
}
break;
}
default:
result = -RT_ERROR;
break;
}
return result;
}
static rt_err_t imxrt_payer_configure(struct rt_audio_device* audio, struct rt_audio_caps* caps)
{
rt_err_t result = RT_EOK;
RT_ASSERT(audio != RT_NULL);
struct imxrt_sai* imxrt_audio = (struct imxrt_sai*)audio->parent.user_data;
switch(caps->main_type)
{
case AUDIO_TYPE_MIXER:
{
switch(caps->sub_type)
{
case AUDIO_MIXER_MUTE:
{
/* set mute mode */
WM8960_SetMute(imxrt_payer_dev.i2c_bus, kWM8960_ModuleDAC, RT_FALSE);
break;
}
case AUDIO_MIXER_VOLUME:
{
int volume = caps->udata.value;
imxrt_audio->volume = volume;
/* set mixer volume */
WM8960_SetVolume(imxrt_payer_dev.i2c_bus, kWM8960_ModuleDAC, volume);
break;
}
default:
result = -RT_ERROR;
break;
}
break;
}
case AUDIO_TYPE_OUTPUT:
{
switch(caps->sub_type)
{
case AUDIO_DSP_PARAM:
{
struct rt_audio_configure config = caps->udata.config;
imxrt_audio->play_config.samplerate = config.samplerate;
imxrt_audio->play_config.samplebits = config.samplebits;
imxrt_audio->play_config.channels = config.channels;
SAI_channels_set(config.channels);
SAI_samplerate_set(config.samplerate);
SAI_samplebits_set(config.samplebits);
break;
}
case AUDIO_DSP_SAMPLERATE:
{
imxrt_audio->play_config.samplerate = caps->udata.config.samplerate;
SAI_samplerate_set(caps->udata.config.samplerate);
break;
}
case AUDIO_DSP_CHANNELS:
{
imxrt_audio->play_config.channels = caps->udata.config.channels;
SAI_channels_set(caps->udata.config.channels);
break;
}
case AUDIO_DSP_SAMPLEBITS:
{
imxrt_audio->play_config.samplebits = caps->udata.config.samplebits;
SAI_samplebits_set(caps->udata.config.samplebits);
break;
}
default:
result = -RT_ERROR;
break;
}
break;
}
case AUDIO_TYPE_INPUT:
{
switch(caps->sub_type)
{
case AUDIO_DSP_PARAM:
{
imxrt_audio->play_config.samplerate = caps->udata.config.samplerate;
imxrt_audio->play_config.channels = caps->udata.config.channels;
imxrt_audio->play_config.samplebits = caps->udata.config.samplebits;
SAI_TransferTerminateReceiveEDMA(sai_rx.base, &sai_rx.dma_rx->rxHandle);
SAI_samplerate_set(caps->udata.config.samplerate);
SAI_channels_set(caps->udata.config.channels);
SAI_samplebits_set(caps->udata.config.samplebits);
break;
}
case AUDIO_DSP_SAMPLERATE:
{
imxrt_audio->play_config.samplerate = caps->udata.config.samplerate;
SAI_samplerate_set(caps->udata.config.samplerate);
break;
}
case AUDIO_DSP_CHANNELS:
{
imxrt_audio->play_config.channels = caps->udata.config.channels;
SAI_channels_set(caps->udata.config.channels);
break;
}
case AUDIO_DSP_SAMPLEBITS:
{
imxrt_audio->play_config.samplebits = caps->udata.config.samplebits;
SAI_samplebits_set(caps->udata.config.samplebits);
break;
}
default:
result = -RT_ERROR;
break;
}
/* After set config, MCLK will stop */
SAI_TxSoftwareReset(sai_tx.base, kSAI_ResetTypeSoftware);
SAI_RxSoftwareReset(sai_rx.base, kSAI_ResetTypeSoftware);
xfer.data = imxrt_payer_dev.tx_fifo; // +i * (AUD_FIFO_SIZE / 4);
xfer.dataSize = AUD_BLOCK_SIZE;
SAI_TransferSendEDMA(sai_tx.base, &sai_tx.dma_tx->txHandle, &xfer);
SAI_TransferReceiveEDMA(sai_rx.base, &sai_rx.dma_rx->rxHandle, &xfer);
break;
}
default:
break;
}
return result;
}
static rt_err_t imxrt_payer_init(struct rt_audio_device* audio)
{
RT_ASSERT(audio != RT_NULL);
imxrt_payer_dev.i2c_bus = (struct rt_i2c_bus_device*)rt_device_find(CODEC_I2C_NAME);
sai_init();
return RT_EOK;
}
static rt_err_t imxrt_payer_start(struct rt_audio_device* audio, int stream)
{
RT_ASSERT(audio != RT_NULL);
sai_format();
WM8960_init(imxrt_payer_dev.i2c_bus, &wm8960Config);
xfer.data = imxrt_payer_dev.rx_fifo;
xfer.dataSize = AUD_BLOCK_SIZE;
#if defined (BSP_USING_AUDIO_RECORD)
SAI_TransferReceiveEDMA(sai_rx.base, &sai_rx.dma_rx->rxHandle, &xfer);
#endif
SAI_TransferSendEDMA(sai_tx.base, &sai_tx.dma_tx->txHandle, &xfer);
return RT_EOK;
}
static rt_err_t imxrt_payer_stop(struct rt_audio_device* audio, int stream)
{
RT_ASSERT(audio != RT_NULL);
SAI_TransferTerminateSendEDMA(sai_tx.base, &sai_tx.dma_tx->txHandle);
SAI_TransferTerminateReceiveEDMA(sai_rx.base, &sai_rx.dma_rx->rxHandle);
WM8960_Deinit(imxrt_payer_dev.i2c_bus);
return RT_EOK;
}
static rt_ssize_t imxrt_payer_transmit(struct rt_audio_device* audio, const void* writeBuf, void* readBuf, rt_size_t size)
{
RT_ASSERT(audio != RT_NULL);
#if defined (BSP_USING_AUDIO_RECORD)
xfer.data = imxrt_payer_dev.rx_fifo;
xfer.dataSize = RX_DMA_FIFO_SIZE;
SAI_TransferReceiveEDMA(sai_rx.base, &sai_rx.dma_rx->rxHandle, &xfer);
SAI_TransferSendEDMA(sai_tx.base, &sai_tx.dma_tx->txHandle, &xfer);
#else
xfer.data = (rt_uint8_t*)writeBuf;
xfer.dataSize = size;
SAI_TransferSendEDMA(sai_tx.base, &sai_tx.dma_tx->txHandle, &xfer);
#endif
return size;
}
static void imxrt_payer_buffer_info(struct rt_audio_device* audio, struct rt_audio_buf_info* info)
{
RT_ASSERT(audio != RT_NULL);
/**
* AUD_FIFO
* +----------------+----------------+
* | block1 | block2 |
* +----------------+----------------+
* \ block_size /
*/
info->buffer = imxrt_payer_dev.tx_fifo;
info->total_size = AUD_DMA_FIFO_SIZE;
info->block_size = AUD_DMA_FIFO_SIZE / 2;
info->block_count = 2;
}
static struct rt_audio_ops imxrt_payer_ops =
{
.getcaps = imxrt_payer_getcaps,
.configure = imxrt_payer_configure,
.init = imxrt_payer_init,
.start = imxrt_payer_start,
.stop = imxrt_payer_stop,
.transmit = imxrt_payer_transmit,
.buffer_info = imxrt_payer_buffer_info,
};
int rt_hw_sound_init(void)
{
rt_uint8_t* tx_fifo = RT_NULL;
rt_uint8_t* rx_fifo = RT_NULL;
sai_tx.base = SAI1;
sai_rx.base = SAI1;
sai_tx.irqn = SAI1_IRQn;
sai_config();
tx_fifo = rt_calloc(1, AUD_DMA_FIFO_SIZE);
rx_fifo = rt_calloc(1, AUD_DMA_FIFO_SIZE);
if(tx_fifo == RT_NULL)
{
return -RT_ENOMEM;
}
rt_memset(tx_fifo, 0, AUD_DMA_FIFO_SIZE);
imxrt_payer_dev.tx_fifo = tx_fifo;
rt_memset(rx_fifo, 0, AUD_DMA_FIFO_SIZE);
imxrt_payer_dev.rx_fifo = rx_fifo;
imxrt_payer_dev.audio.ops = &imxrt_payer_ops;
rt_audio_register(&imxrt_payer_dev.audio, "mic", RT_DEVICE_FLAG_RDWR, &imxrt_payer_dev);
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_sound_init);
#endif /* BSP_USING_AUDIO*/
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