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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-11-17 LiWeiHao First implementation
*/
#include "drv_sound.h"
#include "fsl_common.h"
#include "fsl_iocon.h"
#include "fsl_dma.h"
#include "fsl_i2s.h"
#include "fsl_i2s_dma.h"
#include "fsl_wm8904.h"
#include "fsl_i2c.h"
#define TX_FIFO_SIZE (4096)
#define I2S_TX I2S1
#define I2S_RX I2S0
#define I2S_DMA_TX 15
#define I2S_DMA_RX 12
#ifndef CODEC_I2C_NAME
#define CODEC_I2C_NAME "i2c4"
#endif
struct sound_device
{
wm8904_handle_t wm8904_handle;
dma_handle_t tx_dma_handle;
i2s_dma_handle_t tx_i2s_dma_handle;
struct rt_audio_device audio;
struct rt_audio_configure replay_config;
rt_uint8_t volume;
rt_uint8_t *tx_fifo;
};
const pll_setup_t pll_setup =
{
.syspllctrl = SYSCON_SYSPLLCTRL_BANDSEL_MASK | SYSCON_SYSPLLCTRL_SELP(0x1FU) | SYSCON_SYSPLLCTRL_SELI(0x8U),
.syspllndec = SYSCON_SYSPLLNDEC_NDEC(0x2DU),
.syspllpdec = SYSCON_SYSPLLPDEC_PDEC(0x42U),
.syspllssctrl = {SYSCON_SYSPLLSSCTRL0_MDEC(0x34D3U) | SYSCON_SYSPLLSSCTRL0_SEL_EXT_MASK, 0x00000000U},
.pllRate = 24576000U, /* 16 bits * 2 channels * 44.1 kHz * 16 */
.flags = PLL_SETUPFLAG_WAITLOCK
};
static struct sound_device snd_dev;
void i2s_tx_transfer_callback(I2S_Type *base,
i2s_dma_handle_t *handle,
status_t completionStatus,
void *userData)
{
struct sound_device *snd_dev = (struct sound_device *)userData;
rt_audio_tx_complete(&snd_dev->audio);
}
static rt_err_t lpc_audio_init(struct rt_audio_device *audio)
{
i2s_config_t tx_i2s_config;
wm8904_config_t wm8904_config;
CLOCK_EnableClock(kCLOCK_Iocon);
CLOCK_EnableClock(kCLOCK_InputMux);
CLOCK_EnableClock(kCLOCK_Gpio0);
CLOCK_EnableClock(kCLOCK_Gpio1);
CLOCK_AttachClk(kFRO12M_to_SYS_PLL);
CLOCK_AttachClk(kSYS_PLL_to_FLEXCOMM7);
RESET_PeripheralReset(kFC7_RST_SHIFT_RSTn);
CLOCK_SetPLLFreq(&pll_setup);
CLOCK_AttachClk(kSYS_PLL_to_MCLK);
SYSCON->MCLKDIV = SYSCON_MCLKDIV_DIV(0U);
// Flexcomm 7 I2S Tx
IOCON_PinMuxSet(IOCON, 1, 12, IOCON_FUNC4 | IOCON_DIGITAL_EN); /* Flexcomm 7 / SCK */
IOCON_PinMuxSet(IOCON, 1, 13, IOCON_FUNC4 | IOCON_DIGITAL_EN); /* Flexcomm 7 / SDA */
IOCON_PinMuxSet(IOCON, 1, 14, IOCON_FUNC4 | IOCON_DIGITAL_EN); /* Flexcomm 7 / WS */
/* MCLK output for I2S */
IOCON_PinMuxSet(IOCON, 1, 17, IOCON_FUNC4 | IOCON_MODE_INACT | IOCON_DIGITAL_EN);
SYSCON->MCLKIO = 1U;
WM8904_GetDefaultConfig(&wm8904_config);
snd_dev.wm8904_handle.i2c = (struct rt_i2c_bus_device *)rt_device_find(CODEC_I2C_NAME);
if (WM8904_Init(&snd_dev.wm8904_handle, &wm8904_config) != kStatus_Success)
{
rt_kprintf("wm8904 init failed\n");
return -RT_ERROR;
}
WM8904_SetMute(&snd_dev.wm8904_handle, RT_TRUE, RT_TRUE);
I2S_TxGetDefaultConfig(&tx_i2s_config);
tx_i2s_config.divider = CLOCK_GetPllOutFreq() / 48000U / 16 / 2;
I2S_TxInit(I2S_TX, &tx_i2s_config);
DMA_Init(DMA0);
DMA_EnableChannel(DMA0, I2S_DMA_TX);
DMA_SetChannelPriority(DMA0, I2S_DMA_TX, kDMA_ChannelPriority3);
DMA_CreateHandle(&snd_dev.tx_dma_handle, DMA0, I2S_DMA_TX);
I2S_TxTransferCreateHandleDMA(I2S_TX,
&snd_dev.tx_i2s_dma_handle,
&snd_dev.tx_dma_handle,
i2s_tx_transfer_callback,
(void *)&snd_dev);
return RT_EOK;
}
static rt_err_t lpc_audio_start(struct rt_audio_device *audio, int stream)
{
RT_ASSERT(audio != RT_NULL);
if (stream == AUDIO_STREAM_REPLAY)
{
struct rt_audio_caps caps;
caps.main_type = AUDIO_TYPE_MIXER;
caps.sub_type = AUDIO_MIXER_VOLUME;
audio->ops->getcaps(audio, &caps);
audio->ops->configure(audio, &caps);
rt_audio_tx_complete(audio);
}
return RT_EOK;
}
static rt_err_t lpc_audio_stop(struct rt_audio_device *audio, int stream)
{
if (stream == AUDIO_STREAM_REPLAY)
{
WM8904_SetMute(&snd_dev.wm8904_handle, RT_TRUE, RT_TRUE);
I2S_TransferAbortDMA(I2S_TX, &snd_dev.tx_i2s_dma_handle);
}
return RT_EOK;
}
static rt_err_t lpc_audio_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 lpc_audio_configure(struct rt_audio_device *audio, struct rt_audio_caps *caps)
{
rt_err_t result = RT_EOK;
struct sound_device *snd_dev = audio->parent.user_data;
switch (caps->main_type)
{
case AUDIO_TYPE_MIXER:
{
switch (caps->sub_type)
{
case AUDIO_MIXER_MUTE:
{
WM8904_SetMute(&snd_dev->wm8904_handle, RT_TRUE, RT_TRUE);
snd_dev->volume = 0;
break;
}
case AUDIO_MIXER_VOLUME:
{
int volume = caps->udata.value / 2;
WM8904_SetMute(&snd_dev->wm8904_handle, RT_FALSE, RT_FALSE);
WM8904_SetVolume(&snd_dev->wm8904_handle, volume, volume);
snd_dev->volume = volume;
break;
}
}
break;
}
case AUDIO_TYPE_OUTPUT:
{
switch (caps->sub_type)
{
case AUDIO_DSP_PARAM:
{
struct rt_audio_configure config = caps->udata.config;
i2s_config_t tx_i2s_config;
snd_dev->replay_config.channels = config.channels;
snd_dev->replay_config.samplebits = config.samplebits;
snd_dev->replay_config.samplerate = config.samplerate;
I2S_TxGetDefaultConfig(&tx_i2s_config);
tx_i2s_config.divider = CLOCK_GetPllOutFreq() / config.samplerate / 16 / 2;
I2S_TxInit(I2S_TX, &tx_i2s_config);
break;
}
case AUDIO_DSP_SAMPLERATE:
{
struct rt_audio_configure config = caps->udata.config;
i2s_config_t tx_i2s_config;
snd_dev->replay_config.samplerate = config.samplerate;
I2S_TxGetDefaultConfig(&tx_i2s_config);
tx_i2s_config.divider = CLOCK_GetPllOutFreq() / config.samplerate / 16 / 2;
I2S_TxInit(I2S_TX, &tx_i2s_config);
break;
}
default:
result = -RT_ERROR;
break;
}
break;
}
}
return result;
}
static rt_ssize_t lpc_audio_transmit(struct rt_audio_device *audio, const void *writeBuf, void *readBuf, rt_size_t size)
{
RT_ASSERT(audio != RT_NULL);
i2s_transfer_t transfer;
transfer.data = (uint8_t *)writeBuf;
transfer.dataSize = size;
I2S_TxTransferSendDMA(I2S_TX, &snd_dev.tx_i2s_dma_handle, transfer);
return RT_EOK;
}
static void lpc_audio_buffer_info(struct rt_audio_device *audio, struct rt_audio_buf_info *info)
{
RT_ASSERT(audio != RT_NULL);
/**
* 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 struct rt_audio_ops audio_ops =
{
.getcaps = lpc_audio_getcaps,
.configure = lpc_audio_configure,
.init = lpc_audio_init,
.start = lpc_audio_start,
.stop = lpc_audio_stop,
.transmit = lpc_audio_transmit,
.buffer_info = lpc_audio_buffer_info,
};
int rt_hw_sound_init(void)
{
rt_uint8_t *tx_fifo = RT_NULL;
tx_fifo = rt_malloc(TX_FIFO_SIZE);
if (tx_fifo == NULL)
{
return -RT_ENOMEM;
}
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 = 30;
}
snd_dev.audio.ops = &audio_ops;
rt_audio_register(&snd_dev.audio, "sound0", RT_DEVICE_FLAG_WRONLY, &snd_dev);
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_sound_init);
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