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rt-thread
提交 51f638ad 编写于 作者: L liu2guang
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[BSP][RT1050] improve sdio stability and speed. | 优化SDIO接口稳定性和速度. 

1.格式化代码.
2.优化SDIO接口稳定性和速度: 将SDIO时钟树中分频数增大, 提高内部时钟的稳定性, 同时SDIO速度提高到30M. 并且通过USB拷贝12M MP3文件测试, 多次拷贝数据稳定.
上级 236fd82e
隐藏空白更改
内联 并排
Showing with 153 addition and 151 deletion
bsp/imxrt1052-evk/drivers/drv_sdio.c
浏览文件 @ 51f638ad
......@@ -51,13 +51,13 @@ static int enable_log = 1;
#else
#define MMCSD_DGB(fmt, ...)
#endif
#define CACHE_LINESIZE (32)
#define USDHC_ADMA_TABLE_WORDS (8U) /* define the ADMA descriptor table length */
#define USDHC_ADMA2_ADDR_ALIGN (4U) /* define the ADMA2 descriptor table addr align size */
#define IMXRT_MAX_FREQ (25UL * 1000UL * 1000UL)
#define USDHC_ADMA_TABLE_WORDS (8U) /* define the ADMA descriptor table length */
#define USDHC_ADMA2_ADDR_ALIGN (4U) /* define the ADMA2 descriptor table addr align size */
#define USDHC_READ_BURST_LEN (8U) /*!< number of words USDHC read in a single burst */
......@@ -73,32 +73,33 @@ static int enable_log = 1;
/* Endian mode. */
#define USDHC_ENDIAN_MODE kUSDHC_EndianModeLittle
ALIGN(USDHC_ADMA2_ADDR_ALIGN) uint32_t g_usdhcAdma2Table[USDHC_ADMA_TABLE_WORDS] SECTION("NonCacheable");
struct imxrt_mmcsd {
struct rt_mmcsd_host *host;
struct rt_mmcsd_req *req;
struct rt_mmcsd_cmd *cmd;
struct rt_timer timer;
rt_uint32_t *buf;
struct imxrt_mmcsd
{
struct rt_mmcsd_host *host;
struct rt_mmcsd_req *req;
struct rt_mmcsd_cmd *cmd;
struct rt_timer timer;
rt_uint32_t *buf;
//USDHC_Type *base;
usdhc_host_t usdhc_host;
clock_div_t usdhc_div;
clock_ip_name_t ip_clock;
uint32_t *usdhc_adma2_table;
};
static void _mmcsd_gpio_init(struct imxrt_mmcsd * mmcsd)
static void _mmcsd_gpio_init(struct imxrt_mmcsd *mmcsd)
{
gpio_pin_config_t sw_config;
CLOCK_EnableClock(kCLOCK_Iomuxc); /* iomuxc clock (iomuxc_clk_enable): 0x03u */
#ifdef RT_USING_SDIO1
if (mmcsd->usdhc_host.base == USDHC1)
{
......@@ -112,55 +113,55 @@ static void _mmcsd_gpio_init(struct imxrt_mmcsd * mmcsd)
/* voltage select PIN */
IOMUXC_SetPinMux(IOMUXC_GPIO_B1_14_USDHC1_VSELECT, 0);
/* card detect PIN */
/* card detect PIN */
IOMUXC_SetPinMux(IOMUXC_GPIO_B1_12_GPIO2_IO28, 0);
/* power reset pin */
IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B0_05_GPIO1_IO05, 0);
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_00_USDHC1_CMD, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK | IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) | IOMUXC_SW_PAD_CTL_PAD_PUS(1) |
IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK | IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) | IOMUXC_SW_PAD_CTL_PAD_PUS(1) |
IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_01_USDHC1_CLK, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(1) | IOMUXC_SW_PAD_CTL_PAD_PUS(1) |
IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SW_PAD_CTL_PAD_SPEED(1) | IOMUXC_SW_PAD_CTL_PAD_PUS(1) |
IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_02_USDHC1_DATA0, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_03_USDHC1_DATA1, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_04_USDHC1_DATA2, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_05_USDHC1_DATA3, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
/*voltage select pin*/
IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_14_USDHC1_VSELECT, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(4));
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(4));
IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_12_GPIO2_IO28, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
sw_config.direction = kGPIO_DigitalOutput;
sw_config.outputLogic = 0;
sw_config.interruptMode = kGPIO_NoIntmode;
......@@ -172,12 +173,12 @@ static void _mmcsd_gpio_init(struct imxrt_mmcsd * mmcsd)
#endif
#ifdef RT_USING_SDIO2
if (mmcsd->usdhc_host.base == USDHC2)
{
// todo
}
if (mmcsd->usdhc_host.base == USDHC2)
{
// todo
}
#endif
}
static void SDMMCHOST_ErrorRecovery(USDHC_Type *base)
......@@ -199,10 +200,10 @@ static void SDMMCHOST_ErrorRecovery(USDHC_Type *base)
}
}
static void _mmcsd_host_init(struct imxrt_mmcsd * mmcsd)
static void _mmcsd_host_init(struct imxrt_mmcsd *mmcsd)
{
usdhc_host_t *usdhc_host = &mmcsd->usdhc_host;
/* Initializes SDHC. */
usdhc_host->config.dataTimeout = USDHC_DATA_TIMEOUT;
usdhc_host->config.endianMode = USDHC_ENDIAN_MODE;
......@@ -214,57 +215,57 @@ static void _mmcsd_host_init(struct imxrt_mmcsd * mmcsd)
USDHC_Init(usdhc_host->base, &(usdhc_host->config));
}
static void _mmcsd_clk_init(struct imxrt_mmcsd * mmcsd)
static void _mmcsd_clk_init(struct imxrt_mmcsd *mmcsd)
{
CLOCK_EnableClock(mmcsd->ip_clock);
CLOCK_SetDiv(mmcsd->usdhc_div, 0U);
CLOCK_SetDiv(mmcsd->usdhc_div, 5U);
}
static void _mmcsd_isr_init(struct imxrt_mmcsd * mmcsd)
static void _mmcsd_isr_init(struct imxrt_mmcsd *mmcsd)
{
//NVIC_SetPriority(USDHC1_IRQn, 5U);
}
static void _mmc_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
{
struct imxrt_mmcsd * mmcsd;
struct rt_mmcsd_cmd * cmd;
struct rt_mmcsd_data * data;
struct imxrt_mmcsd *mmcsd;
struct rt_mmcsd_cmd *cmd;
struct rt_mmcsd_data *data;
status_t error;
usdhc_adma_config_t dmaConfig;
usdhc_transfer_t fsl_content = {0};
usdhc_command_t fsl_command = {0};
usdhc_data_t fsl_data = {0};
rt_uint32_t * buf = NULL;
rt_uint32_t *buf = NULL;
RT_ASSERT(host != RT_NULL);
RT_ASSERT(req != RT_NULL);
mmcsd = (struct imxrt_mmcsd *)host->private_data;
RT_ASSERT(mmcsd != RT_NULL);
cmd = req->cmd;
RT_ASSERT(cmd != RT_NULL);
MMCSD_DGB("\tcmd->cmd_code: %02d, cmd->arg: %08x, cmd->flags: %08x --> ", cmd->cmd_code, cmd->arg, cmd->flags);
data = cmd->data;
memset(&dmaConfig, 0, sizeof(usdhc_adma_config_t));
/* config adma */
dmaConfig.dmaMode = USDHC_DMA_MODE;
dmaConfig.burstLen = kUSDHC_EnBurstLenForINCR;
dmaConfig.admaTable = mmcsd->usdhc_adma2_table;
dmaConfig.admaTableWords = USDHC_ADMA_TABLE_WORDS;
fsl_command.index = cmd->cmd_code;
fsl_command.argument = cmd->arg;
if (cmd->cmd_code == STOP_TRANSMISSION)
fsl_command.type = kCARD_CommandTypeAbort;
else
fsl_command.type = kCARD_CommandTypeNormal;
switch (cmd->flags & RESP_MASK)
{
case RESP_NONE:
......@@ -294,16 +295,16 @@ static void _mmc_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
case RESP_R5:
fsl_command.responseType = kCARD_ResponseTypeR5;
break;
/*
case RESP_R5B:
fsl_command.responseType = kCARD_ResponseTypeR5b;
break;
*/
/*
case RESP_R5B:
fsl_command.responseType = kCARD_ResponseTypeR5b;
break;
*/
default:
RT_ASSERT(NULL);
}
// command type
// command type
/*
switch (cmd->flags & CMD_MASK)
{
......@@ -317,13 +318,13 @@ static void _mmc_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
break;
}
*/
fsl_command.flags = 0;
//fsl_command.response
//fsl_command.responseErrorFlags
fsl_content.command = &fsl_command;
if (data)
{
if (req->stop != NULL)
......@@ -335,23 +336,23 @@ static void _mmc_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
fsl_data.enableIgnoreError = false;
fsl_data.dataType = kUSDHC_TransferDataNormal; //todo : update data type
fsl_data.blockSize = data->blksize;
fsl_data.blockSize = data->blksize;
fsl_data.blockCount = data->blks;
MMCSD_DGB(" blksize:%d, blks:%d ", fsl_data.blockSize, fsl_data.blockCount);
if (((rt_uint32_t)data->buf & (CACHE_LINESIZE - 1)) || // align cache(32byte)
((rt_uint32_t)data->buf > 0x00000000 && (rt_uint32_t)data->buf < 0x00080000) /*|| // ITCM
((rt_uint32_t)data->buf > 0x00000000 && (rt_uint32_t)data->buf < 0x00080000) /*|| // ITCM
((rt_uint32_t)data->buf >= 0x20000000 && (rt_uint32_t)data->buf < 0x20080000)*/) // DTCM
{
buf = rt_malloc_align(fsl_data.blockSize * fsl_data.blockCount, CACHE_LINESIZE);
RT_ASSERT(buf != RT_NULL);
MMCSD_DGB(" malloc buf: %p, data->buf:%p, %d ", buf, data->buf, fsl_data.blockSize * fsl_data.blockCount);
}
if ((cmd->cmd_code == WRITE_BLOCK) || (cmd->cmd_code == WRITE_MULTIPLE_BLOCK))
{
if (buf)
......@@ -364,8 +365,8 @@ static void _mmc_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
{
fsl_data.txData = (uint32_t const *)data->buf;
}
fsl_data.rxData = NULL;
fsl_data.rxData = NULL;
}
else
{
......@@ -377,17 +378,17 @@ static void _mmc_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
{
fsl_data.rxData = (uint32_t *)data->buf;
}
fsl_data.txData = NULL;
}
fsl_content.data = &fsl_data;
}
}
else
{
fsl_content.data = NULL;
}
error = USDHC_TransferBlocking(mmcsd->usdhc_host.base, &dmaConfig, &fsl_content);
if (error == kStatus_Fail)
{
......@@ -395,7 +396,7 @@ static void _mmc_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
MMCSD_DGB(" ***USDHC_TransferBlocking error: %d*** --> \n", error);
cmd->err = -RT_ERROR;
}
if (buf)
{
if (fsl_data.rxData)
......@@ -403,57 +404,57 @@ static void _mmc_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
MMCSD_DGB("read copy buf to data->buf ");
rt_memcpy(data->buf, buf, fsl_data.blockSize * fsl_data.blockCount);
}
rt_free_align(buf);
}
if ((cmd->flags & RESP_MASK) == RESP_R2)
if ((cmd->flags & RESP_MASK) == RESP_R2)
{
cmd->resp[3] = fsl_command.response[0];
cmd->resp[2] = fsl_command.response[1];
cmd->resp[1] = fsl_command.response[2];
cmd->resp[0] = fsl_command.response[3];
MMCSD_DGB(" resp 0x%08X 0x%08X 0x%08X 0x%08X\n",
cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
}
cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
}
else
{
cmd->resp[0] = fsl_command.response[0];
MMCSD_DGB(" resp 0x%08X\n", cmd->resp[0]);
}
mmcsd_req_complete(host);
return;
}
static void _mmc_set_iocfg(struct rt_mmcsd_host *host, struct rt_mmcsd_io_cfg *io_cfg)
{
struct imxrt_mmcsd * mmcsd;
struct imxrt_mmcsd *mmcsd;
unsigned int usdhc_clk;
unsigned int bus_width;
uint32_t src_clk;
RT_ASSERT(host != RT_NULL);
RT_ASSERT(host->private_data != RT_NULL);
RT_ASSERT(io_cfg != RT_NULL);
mmcsd = (struct imxrt_mmcsd *)host->private_data;
usdhc_clk = io_cfg->clock;
bus_width = io_cfg->bus_width;
if(usdhc_clk > IMXRT_MAX_FREQ)
usdhc_clk = IMXRT_MAX_FREQ;
bus_width = io_cfg->bus_width;
if (usdhc_clk > IMXRT_MAX_FREQ)
usdhc_clk = IMXRT_MAX_FREQ;
src_clk = (CLOCK_GetSysPfdFreq(kCLOCK_Pfd2) / (CLOCK_GetDiv(mmcsd->usdhc_div) + 1U));
MMCSD_DGB("\tsrc_clk: %d, usdhc_clk: %d, bus_width: %d\n", src_clk, usdhc_clk, bus_width);
if (usdhc_clk)
{
USDHC_SetSdClock(mmcsd->usdhc_host.base, src_clk, usdhc_clk);
//CLOCK_EnableClock(mmcsd->ip_clock);
/* Change bus width */
if (bus_width == MMCSD_BUS_WIDTH_8)
USDHC_SetDataBusWidth(mmcsd->usdhc_host.base, kUSDHC_DataBusWidth8Bit);
......@@ -468,7 +469,7 @@ static void _mmc_set_iocfg(struct rt_mmcsd_host *host, struct rt_mmcsd_io_cfg *i
{
//CLOCK_DisableClock(mmcsd->ip_clock);
}
}
#ifdef DEBUG
......@@ -483,7 +484,7 @@ FINSH_FUNCTION_EXPORT(log_toggle, toglle log dumple);
//{
// MMCSD_DGB("%s, start\n", __func__);
// MMCSD_DGB("%s, end\n", __func__);
//
//
// return 0;
//}
//
......@@ -492,71 +493,72 @@ FINSH_FUNCTION_EXPORT(log_toggle, toglle log dumple);
//
//}
static const struct rt_mmcsd_host_ops ops = {
_mmc_request,
_mmc_set_iocfg,
static const struct rt_mmcsd_host_ops ops =
{
_mmc_request,
_mmc_set_iocfg,
RT_NULL,//_mmc_get_card_status,
RT_NULL,//_mmc_enable_sdio_irq,
RT_NULL,//_mmc_enable_sdio_irq,
};
rt_int32_t _imxrt_mci_init(void)
{
struct rt_mmcsd_host *host;
struct imxrt_mmcsd *mmcsd;
host = mmcsd_alloc_host();
if (!host)
{
return -RT_ERROR;
}
mmcsd = rt_malloc(sizeof(struct imxrt_mmcsd));
if (!mmcsd)
{
rt_kprintf("alloc mci failed\n");
goto err;
}
rt_memset(mmcsd, 0, sizeof(struct imxrt_mmcsd));
struct rt_mmcsd_host *host;
struct imxrt_mmcsd *mmcsd;
host = mmcsd_alloc_host();
if (!host)
{
return -RT_ERROR;
}
mmcsd = rt_malloc(sizeof(struct imxrt_mmcsd));
if (!mmcsd)
{
rt_kprintf("alloc mci failed\n");
goto err;
}
rt_memset(mmcsd, 0, sizeof(struct imxrt_mmcsd));
mmcsd->usdhc_host.base = USDHC1;
mmcsd->usdhc_div = kCLOCK_Usdhc1Div;
mmcsd->usdhc_adma2_table = g_usdhcAdma2Table;
host->ops = &ops;
host->freq_min = 375000;
host->freq_max = 25000000;
host->valid_ocr = VDD_32_33 | VDD_33_34;
host->flags = MMCSD_BUSWIDTH_4 | MMCSD_MUTBLKWRITE | \
MMCSD_SUP_HIGHSPEED | MMCSD_SUP_SDIO_IRQ;
host->max_seg_size = 65535;
host->max_dma_segs = 2;
host->max_blk_size = 512;
host->max_blk_count = 4096;
host->ops = &ops;
host->freq_min = 375000;
host->freq_max = 25000000;
host->valid_ocr = VDD_32_33 | VDD_33_34;
host->flags = MMCSD_BUSWIDTH_4 | MMCSD_MUTBLKWRITE | \
MMCSD_SUP_HIGHSPEED | MMCSD_SUP_SDIO_IRQ;
host->max_seg_size = 65535;
host->max_dma_segs = 2;
host->max_blk_size = 512;
host->max_blk_count = 4096;
mmcsd->host = host;
mmcsd->host = host;
_mmcsd_clk_init(mmcsd);
_mmcsd_isr_init(mmcsd);
_mmcsd_gpio_init(mmcsd);
_mmcsd_gpio_init(mmcsd);
_mmcsd_host_init(mmcsd);
host->private_data = mmcsd;
host->private_data = mmcsd;
mmcsd_change(host);
mmcsd_change(host);
return 0;
return 0;
err:
mmcsd_free_host(host);
mmcsd_free_host(host);
return -RT_ENOMEM;
return -RT_ENOMEM;
}
int imxrt_mci_init(void)
{
/* initilize sd card */
_imxrt_mci_init();
return 0;
}
INIT_DEVICE_EXPORT(imxrt_mci_init);
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