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rt-thread-official/bsp/nuvoton/libraries/m2354/rtt_port/drv_i2s.c

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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-2-7 Wayne Lin First version
*
******************************************************************************/
#include <rtconfig.h>
#if defined(BSP_USING_I2S)
#include <rtdevice.h>
#include <drv_pdma.h>
#include <drv_i2s.h>
/* Private define ---------------------------------------------------------------*/
#define DBG_ENABLE
#define DBG_LEVEL DBG_LOG
#define DBG_SECTION_NAME "i2s"
#define DBG_COLOR
#include <rtdbg.h>
/* Private functions ------------------------------------------------------------*/
static rt_err_t nu_i2s_getcaps(struct rt_audio_device *audio, struct rt_audio_caps *caps);
static rt_err_t nu_i2s_configure(struct rt_audio_device *audio, struct rt_audio_caps *caps);
static rt_err_t nu_i2s_init(struct rt_audio_device *audio);
static rt_err_t nu_i2s_start(struct rt_audio_device *audio, int stream);
static rt_err_t nu_i2s_stop(struct rt_audio_device *audio, int stream);
static void nu_i2s_buffer_info(struct rt_audio_device *audio, struct rt_audio_buf_info *info);
/* Public functions -------------------------------------------------------------*/
rt_err_t nu_i2s_acodec_register(nu_acodec_ops_t);
/* Private variables ------------------------------------------------------------*/
static struct nu_i2s g_nu_i2s_dev =
{
.name = "sound0",
.i2s_base = I2S0,
.i2s_rst = I2S0_RST,
.i2s_dais = {
[NU_I2S_DAI_PLAYBACK] = {
.pdma_perp = PDMA_I2S0_TX,
},
[NU_I2S_DAI_CAPTURE] = {
.pdma_perp = PDMA_I2S0_RX,
}
}
};
static void nu_pdma_i2s_rx_cb(void *pvUserData, uint32_t u32EventFilter)
{
nu_i2s_t psNuI2s = (nu_i2s_t)pvUserData;
nu_i2s_dai_t psNuI2sDai;
RT_ASSERT(psNuI2s != RT_NULL);
psNuI2sDai = &psNuI2s->i2s_dais[NU_I2S_DAI_CAPTURE];
if (u32EventFilter & NU_PDMA_EVENT_TRANSFER_DONE)
{
// Report a buffer ready.
rt_uint8_t *pbuf_old = &psNuI2sDai->fifo[psNuI2sDai->fifo_block_idx * NU_I2S_DMA_BUF_BLOCK_SIZE] ;
psNuI2sDai->fifo_block_idx = (psNuI2sDai->fifo_block_idx + 1) % NU_I2S_DMA_BUF_BLOCK_NUMBER;
/* Report upper layer. */
rt_audio_rx_done(&psNuI2s->audio, pbuf_old, NU_I2S_DMA_BUF_BLOCK_SIZE);
}
}
static void nu_pdma_i2s_tx_cb(void *pvUserData, uint32_t u32EventFilter)
{
nu_i2s_t psNuI2s = (nu_i2s_t)pvUserData;
nu_i2s_dai_t psNuI2sDai;
RT_ASSERT(psNuI2s != RT_NULL);
psNuI2sDai = &psNuI2s->i2s_dais[NU_I2S_DAI_PLAYBACK];
if (u32EventFilter & NU_PDMA_EVENT_TRANSFER_DONE)
{
rt_audio_tx_complete(&psNuI2s->audio);
psNuI2sDai->fifo_block_idx = (psNuI2sDai->fifo_block_idx + 1) % NU_I2S_DMA_BUF_BLOCK_NUMBER;
}
}
static rt_err_t nu_i2s_pdma_sc_config(nu_i2s_t psNuI2s, E_NU_I2S_DAI dai)
{
rt_err_t result = RT_EOK;
I2S_T *i2s_base;
nu_i2s_dai_t psNuI2sDai;
int i;
uint32_t u32Src, u32Dst;
nu_pdma_cb_handler_t pfm_pdma_cb;
RT_ASSERT(psNuI2s != RT_NULL);
/* Get base address of i2s register */
i2s_base = psNuI2s->i2s_base;
psNuI2sDai = &psNuI2s->i2s_dais[dai];
switch ((int)dai)
{
case NU_I2S_DAI_PLAYBACK:
pfm_pdma_cb = nu_pdma_i2s_tx_cb;
u32Src = (uint32_t)&psNuI2sDai->fifo[0];
u32Dst = (uint32_t)&i2s_base->TXFIFO;
break;
case NU_I2S_DAI_CAPTURE:
pfm_pdma_cb = nu_pdma_i2s_rx_cb;
u32Src = (uint32_t)&i2s_base->RXFIFO;
u32Dst = (uint32_t)&psNuI2sDai->fifo[0];
break;
default:
return -RT_EINVAL;
}
result = nu_pdma_callback_register(psNuI2sDai->pdma_chanid,
pfm_pdma_cb,
(void *)psNuI2s,
NU_PDMA_EVENT_TRANSFER_DONE);
RT_ASSERT(result == RT_EOK);
for (i = 0; i < NU_I2S_DMA_BUF_BLOCK_NUMBER; i++)
{
/* Setup dma descriptor entry */
result = nu_pdma_desc_setup(psNuI2sDai->pdma_chanid, // Channel ID
psNuI2sDai->pdma_descs[i], // this descriptor
32, // 32-bits
(dai == NU_I2S_DAI_PLAYBACK) ? u32Src + (i * NU_I2S_DMA_BUF_BLOCK_SIZE) : u32Src, //Memory or RXFIFO
(dai == NU_I2S_DAI_PLAYBACK) ? u32Dst : u32Dst + (i * NU_I2S_DMA_BUF_BLOCK_SIZE), //TXFIFO or Memory
(int32_t)NU_I2S_DMA_BUF_BLOCK_SIZE / 4, // Transfer count
psNuI2sDai->pdma_descs[(i + 1) % NU_I2S_DMA_BUF_BLOCK_NUMBER]); // Next descriptor
RT_ASSERT(result == RT_EOK);
}
/* Assign head descriptor */
result = nu_pdma_sg_transfer(psNuI2sDai->pdma_chanid, psNuI2sDai->pdma_descs[0], 0);
RT_ASSERT(result == RT_EOK);
return result;
}
static rt_bool_t nu_i2s_capacity_check(struct rt_audio_configure *pconfig)
{
switch (pconfig->samplebits)
{
case 8:
case 16:
/* case 24: PDMA constrain */
case 32:
break;
default:
goto exit_nu_i2s_capacity_check;
}
switch (pconfig->channels)
{
case 1:
case 2:
break;
default:
goto exit_nu_i2s_capacity_check;
}
return RT_TRUE;
exit_nu_i2s_capacity_check:
return RT_FALSE;
}
static rt_err_t nu_i2s_dai_setup(nu_i2s_t psNuI2s, struct rt_audio_configure *pconfig)
{
rt_err_t result = RT_EOK;
nu_acodec_ops_t pNuACodecOps = RT_NULL;
RT_ASSERT(psNuI2s->AcodecOps != RT_NULL);
pNuACodecOps = psNuI2s->AcodecOps;
rt_uint32_t real_samplerate;
/* Open I2S */
if (nu_i2s_capacity_check(pconfig) == RT_TRUE)
{
/* Reset audio codec */
if (pNuACodecOps->nu_acodec_reset)
result = pNuACodecOps->nu_acodec_reset();
if (result != RT_EOK)
goto exit_nu_i2s_dai_setup;
/* Setup audio codec */
if (pNuACodecOps->nu_acodec_init)
result = pNuACodecOps->nu_acodec_init();
if (!pNuACodecOps->nu_acodec_init || result != RT_EOK)
goto exit_nu_i2s_dai_setup;
/* Setup acodec samplerate/samplebit/channel */
if (pNuACodecOps->nu_acodec_dsp_control)
result = pNuACodecOps->nu_acodec_dsp_control(pconfig);
if (!pNuACodecOps->nu_acodec_dsp_control || result != RT_EOK)
goto exit_nu_i2s_dai_setup;
real_samplerate = I2S_Open(psNuI2s->i2s_base,
(psNuI2s->AcodecOps->role == NU_ACODEC_ROLE_MASTER) ? I2S_MODE_SLAVE : I2S_MODE_MASTER,
pconfig->samplerate,
(((pconfig->samplebits / 8) - 1) << I2S_CTL0_DATWIDTH_Pos),
(pconfig->channels == 1) ? I2S_ENABLE_MONO : I2S_DISABLE_MONO,
I2S_FORMAT_I2S);
LOG_I("Open I2S.");
/* Open I2S0 interface and set to slave mode, stereo channel, I2S format */
if (pconfig->samplerate != real_samplerate)
{
LOG_W("Real sample rate: %d Hz != preferred sample rate: %d Hz\n", real_samplerate, pconfig->samplerate);
}
/* Set MCLK and enable MCLK */
/* The target MCLK is related to audio codec setting. */
I2S_EnableMCLK(psNuI2s->i2s_base, 12000000);
/* Set unmute */
if (pNuACodecOps->nu_acodec_mixer_control)
pNuACodecOps->nu_acodec_mixer_control(AUDIO_MIXER_MUTE, RT_FALSE);
}
else
result = -RT_EINVAL;
exit_nu_i2s_dai_setup:
return result;
}
static rt_err_t nu_i2s_getcaps(struct rt_audio_device *audio, struct rt_audio_caps *caps)
{
rt_err_t result = RT_EOK;
nu_i2s_t psNuI2s;
nu_acodec_ops_t pNuACodecOps = RT_NULL;
RT_ASSERT(audio != RT_NULL);
RT_ASSERT(caps != RT_NULL);
psNuI2s = (nu_i2s_t)audio;
RT_ASSERT(psNuI2s->AcodecOps != RT_NULL);
pNuACodecOps = psNuI2s->AcodecOps;
switch (caps->main_type)
{
case AUDIO_TYPE_QUERY:
switch (caps->sub_type)
{
case AUDIO_TYPE_QUERY:
caps->udata.mask = AUDIO_TYPE_INPUT | AUDIO_TYPE_OUTPUT | AUDIO_TYPE_MIXER;
break;
default:
result = -RT_ERROR;
break;
} // switch (caps->sub_type)
break;
case AUDIO_TYPE_MIXER:
if (pNuACodecOps->nu_acodec_mixer_query)
{
switch (caps->sub_type)
{
case AUDIO_MIXER_QUERY:
return pNuACodecOps->nu_acodec_mixer_query(AUDIO_MIXER_QUERY, &caps->udata.mask);
default:
return pNuACodecOps->nu_acodec_mixer_query(caps->sub_type, (rt_uint32_t *)&caps->udata.value);
} // switch (caps->sub_type)
} // if (pNuACodecOps->nu_acodec_mixer_query)
result = -RT_ERROR;
break;
case AUDIO_TYPE_INPUT:
case AUDIO_TYPE_OUTPUT:
switch (caps->sub_type)
{
case AUDIO_DSP_PARAM:
caps->udata.config.channels = psNuI2s->config.channels;
caps->udata.config.samplebits = psNuI2s->config.samplebits;
caps->udata.config.samplerate = psNuI2s->config.samplerate;
break;
case AUDIO_DSP_SAMPLERATE:
caps->udata.config.samplerate = psNuI2s->config.samplerate;
break;
case AUDIO_DSP_CHANNELS:
caps->udata.config.channels = psNuI2s->config.channels;
break;
case AUDIO_DSP_SAMPLEBITS:
caps->udata.config.samplebits = psNuI2s->config.samplebits;
break;
default:
result = -RT_ERROR;
break;
} // switch (caps->sub_type)
break;
default:
result = -RT_ERROR;
break;
} // switch (caps->main_type)
return result;
}
static rt_err_t nu_i2s_configure(struct rt_audio_device *audio, struct rt_audio_caps *caps)
{
rt_err_t result = RT_EOK;
nu_i2s_t psNuI2s;
nu_acodec_ops_t pNuACodecOps = RT_NULL;
int stream = -1;
RT_ASSERT(audio != RT_NULL);
RT_ASSERT(caps != RT_NULL);
psNuI2s = (nu_i2s_t)audio;
RT_ASSERT(psNuI2s->AcodecOps != RT_NULL);
pNuACodecOps = psNuI2s->AcodecOps;
switch (caps->main_type)
{
case AUDIO_TYPE_MIXER:
if (psNuI2s->AcodecOps->nu_acodec_mixer_control)
psNuI2s->AcodecOps->nu_acodec_mixer_control(caps->sub_type, caps->udata.value);
break;
case AUDIO_TYPE_INPUT:
stream = AUDIO_STREAM_RECORD;
case AUDIO_TYPE_OUTPUT:
{
rt_bool_t bNeedReset = RT_FALSE;
if (stream < 0)
stream = AUDIO_STREAM_REPLAY;
switch (caps->sub_type)
{
case AUDIO_DSP_PARAM:
if (rt_memcmp(&psNuI2s->config, &caps->udata.config, sizeof(struct rt_audio_configure)) != 0)
{
rt_memcpy(&psNuI2s->config, &caps->udata.config, sizeof(struct rt_audio_configure));
bNeedReset = RT_TRUE;
}
break;
case AUDIO_DSP_SAMPLEBITS:
if (psNuI2s->config.samplerate != caps->udata.config.samplebits)
{
psNuI2s->config.samplerate = caps->udata.config.samplebits;
bNeedReset = RT_TRUE;
}
break;
case AUDIO_DSP_CHANNELS:
if (psNuI2s->config.channels != caps->udata.config.channels)
{
pNuACodecOps->config.channels = caps->udata.config.channels;
bNeedReset = RT_TRUE;
}
break;
case AUDIO_DSP_SAMPLERATE:
if (psNuI2s->config.samplerate != caps->udata.config.samplerate)
{
psNuI2s->config.samplerate = caps->udata.config.samplerate;
bNeedReset = RT_TRUE;
}
break;
default:
result = -RT_ERROR;
break;
} // switch (caps->sub_type)
if (bNeedReset)
{
return nu_i2s_start(audio, stream);
}
}
break;
default:
result = -RT_ERROR;
break;
} // switch (caps->main_type)
return result;
}
static rt_err_t nu_i2s_init(struct rt_audio_device *audio)
{
rt_err_t result = RT_EOK;
nu_i2s_t psNuI2s;
RT_ASSERT(audio != RT_NULL);
psNuI2s = (nu_i2s_t)audio;
/* Reset this module */
SYS_ResetModule(psNuI2s->i2s_rst);
return -(result);
}
static rt_err_t nu_i2s_start(struct rt_audio_device *audio, int stream)
{
nu_i2s_t psNuI2s;
RT_ASSERT(audio != RT_NULL);
psNuI2s = (nu_i2s_t)audio;
/* Restart all: I2S and codec. */
nu_i2s_stop(audio, stream);
if (nu_i2s_dai_setup(psNuI2s, &psNuI2s->config) != RT_EOK)
return -RT_ERROR;
switch (stream)
{
case AUDIO_STREAM_REPLAY:
{
nu_i2s_pdma_sc_config(psNuI2s, NU_I2S_DAI_PLAYBACK);
/* Start TX DMA */
I2S_ENABLE_TXDMA(psNuI2s->i2s_base);
/* Enable I2S Tx function */
I2S_ENABLE_TX(psNuI2s->i2s_base);
LOG_I("Start replay.");
}
break;
case AUDIO_STREAM_RECORD:
{
nu_i2s_pdma_sc_config(psNuI2s, NU_I2S_DAI_CAPTURE);
/* Start RX DMA */
I2S_ENABLE_RXDMA(psNuI2s->i2s_base);
/* Enable I2S Rx function */
I2S_ENABLE_RX(psNuI2s->i2s_base);
LOG_I("Start record.");
}
break;
default:
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t nu_i2s_stop(struct rt_audio_device *audio, int stream)
{
nu_i2s_t psNuI2s;
nu_i2s_dai_t psNuI2sDai = RT_NULL;
RT_ASSERT(audio != RT_NULL);
psNuI2s = (nu_i2s_t)audio;
switch (stream)
{
case AUDIO_STREAM_REPLAY:
psNuI2sDai = &psNuI2s->i2s_dais[NU_I2S_DAI_PLAYBACK];
// Disable TX
I2S_DISABLE_TXDMA(psNuI2s->i2s_base);
I2S_DISABLE_TX(psNuI2s->i2s_base);
LOG_I("Stop replay.");
break;
case AUDIO_STREAM_RECORD:
psNuI2sDai = &psNuI2s->i2s_dais[NU_I2S_DAI_CAPTURE];
// Disable RX
I2S_DISABLE_RXDMA(psNuI2s->i2s_base);
I2S_DISABLE_RX(psNuI2s->i2s_base);
LOG_I("Stop record.");
break;
default:
return -RT_EINVAL;
}
/* Stop DMA transfer. */
nu_pdma_channel_terminate(psNuI2sDai->pdma_chanid);
/* Close I2S */
if (!(psNuI2s->i2s_base->CTL0 & (I2S_CTL0_TXEN_Msk | I2S_CTL0_RXEN_Msk)))
{
I2S_DisableMCLK(psNuI2s->i2s_base);
I2S_Close(psNuI2s->i2s_base);
LOG_I("Close I2S.");
}
/* Silence */
rt_memset((void *)psNuI2sDai->fifo, 0, NU_I2S_DMA_FIFO_SIZE);
psNuI2sDai->fifo_block_idx = 0;
return RT_EOK;
}
static void nu_i2s_buffer_info(struct rt_audio_device *audio, struct rt_audio_buf_info *info)
{
nu_i2s_t psNuI2s;
RT_ASSERT(audio != RT_NULL);
RT_ASSERT(info != RT_NULL);
psNuI2s = (nu_i2s_t)audio;
info->buffer = (rt_uint8_t *)psNuI2s->i2s_dais[NU_I2S_DAI_PLAYBACK].fifo ;
info->total_size = NU_I2S_DMA_FIFO_SIZE;
info->block_size = NU_I2S_DMA_BUF_BLOCK_SIZE;
info->block_count = NU_I2S_DMA_BUF_BLOCK_NUMBER;
return;
}
static struct rt_audio_ops nu_i2s_audio_ops =
{
.getcaps = nu_i2s_getcaps,
.configure = nu_i2s_configure,
.init = nu_i2s_init,
.start = nu_i2s_start,
.stop = nu_i2s_stop,
.transmit = RT_NULL,
.buffer_info = nu_i2s_buffer_info
};
static rt_err_t nu_hw_i2s_pdma_allocate(nu_i2s_dai_t psNuI2sDai)
{
/* Allocate I2S nu_dma channel */
if ((psNuI2sDai->pdma_chanid = nu_pdma_channel_allocate(psNuI2sDai->pdma_perp)) < 0)
{
goto nu_hw_i2s_pdma_allocate;
}
return RT_EOK;
nu_hw_i2s_pdma_allocate:
return -(RT_ERROR);
}
int rt_hw_i2s_init(void)
{
int i = 0;
nu_i2s_dai_t psNuI2sDai;
for (i = 0; i < NU_I2S_DAI_CNT; i++)
{
uint8_t *pu8ptr = rt_malloc(NU_I2S_DMA_FIFO_SIZE);
psNuI2sDai = &g_nu_i2s_dev.i2s_dais[i];
psNuI2sDai->fifo = pu8ptr;
rt_memset(pu8ptr, 0, NU_I2S_DMA_FIFO_SIZE);
RT_ASSERT(psNuI2sDai->fifo != RT_NULL);
psNuI2sDai->pdma_chanid = -1;
psNuI2sDai->fifo_block_idx = 0;
RT_ASSERT(nu_hw_i2s_pdma_allocate(psNuI2sDai) == RT_EOK);
RT_ASSERT(nu_pdma_sgtbls_allocate(&psNuI2sDai->pdma_descs[0], NU_I2S_DMA_BUF_BLOCK_NUMBER) == RT_EOK);
}
/* Register ops of audio device */
g_nu_i2s_dev.audio.ops = &nu_i2s_audio_ops;
/* Register device, RW: it is with replay and record functions. */
rt_audio_register(&g_nu_i2s_dev.audio, g_nu_i2s_dev.name, RT_DEVICE_FLAG_RDWR, &g_nu_i2s_dev);
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_i2s_init);
#endif //#if defined(BSP_USING_I2S)
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