/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2022-05-16 shelton first version */ #include "drv_common.h" #include "drv_sdio.h" #ifdef BSP_USING_SDIO #if !defined (BSP_USING_SDIO1) #error "Please define at least one SDIOx" #endif //#define DRV_DEBUG #define LOG_TAG "drv.sdio" #include static struct at32_sdio_config sdio_config = SDIO_BUS_CONFIG; static struct at32_sdio_class sdio_obj; static struct rt_mmcsd_host *host; #define SDIO_TX_RX_COMPLETE_TIMEOUT_LOOPS (100000) #define RT_HW_SDIO_LOCK(_sdio) rt_mutex_take(&_sdio->mutex, RT_WAITING_FOREVER) #define RT_HW_SDIO_UNLOCK(_sdio) rt_mutex_release(&_sdio->mutex); struct sdio_pkg { struct rt_mmcsd_cmd *cmd; void *buff; rt_uint32_t flag; }; struct rt_hw_sdio { struct rt_mmcsd_host *host; struct at32_sdio_des sdio_des; struct rt_event event; struct rt_mutex mutex; struct sdio_pkg *pkg; }; ALIGN(SDIO_ALIGN_LEN) static rt_uint8_t cache_buf[SDIO_BUFF_SIZE]; static rt_uint32_t at32_sdio_clk_get(struct at32_sdio *hw_sdio) { return SDIO_CLOCK_FREQ; } /** * @brief this function get order from sdio. * @param data * @retval sdio order */ static int get_order(rt_uint32_t data) { int order = 0; switch (data) { case 1: order = 0; break; case 2: order = 1; break; case 4: order = 2; break; case 8: order = 3; break; case 16: order = 4; break; case 32: order = 5; break; case 64: order = 6; break; case 128: order = 7; break; case 256: order = 8; break; case 512: order = 9; break; case 1024: order = 10; break; case 2048: order = 11; break; case 4096: order = 12; break; case 8192: order = 13; break; case 16384: order = 14; break; default : order = 0; break; } return order; } /** * @brief this function wait sdio completed. * @param sdio rt_hw_sdio * @retval none */ static void rt_hw_sdio_wait_completed(struct rt_hw_sdio *sdio) { rt_uint32_t status; struct rt_mmcsd_cmd *cmd = sdio->pkg->cmd; struct rt_mmcsd_data *data = cmd->data; struct at32_sdio *hw_sdio = sdio->sdio_des.hw_sdio; if (rt_event_recv(&sdio->event, 0xffffffff, RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR, rt_tick_from_millisecond(5000), &status) != RT_EOK) { LOG_E("wait completed timeout"); cmd->err = -RT_ETIMEOUT; return; } if (sdio->pkg == RT_NULL) { return; } cmd->resp[0] = hw_sdio->resp1; cmd->resp[1] = hw_sdio->resp2; cmd->resp[2] = hw_sdio->resp3; cmd->resp[3] = hw_sdio->resp4; if (status & HW_SDIO_ERRORS) { if ((status & HW_SDIO_IT_CCRCFAIL) && (resp_type(cmd) & (RESP_R3 | RESP_R4))) { cmd->err = RT_EOK; } else { cmd->err = -RT_ERROR; } if (status & HW_SDIO_IT_CTIMEOUT) { cmd->err = -RT_ETIMEOUT; } if (status & HW_SDIO_IT_DCRCFAIL) { data->err = -RT_ERROR; } if (status & HW_SDIO_IT_DTIMEOUT) { data->err = -RT_ETIMEOUT; } if (cmd->err == RT_EOK) { LOG_D("sta:0x%08X [%08X %08X %08X %08X]", status, cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]); } else { LOG_D("err:0x%08x, %s%s%s%s%s%s%s cmd:%d arg:0x%08x rw:%c len:%d blksize:%d", status, status & HW_SDIO_IT_CCRCFAIL ? "CCRCFAIL " : "", status & HW_SDIO_IT_DCRCFAIL ? "DCRCFAIL " : "", status & HW_SDIO_IT_CTIMEOUT ? "CTIMEOUT " : "", status & HW_SDIO_IT_DTIMEOUT ? "DTIMEOUT " : "", status & HW_SDIO_IT_TXUNDERR ? "TXUNDERR " : "", status & HW_SDIO_IT_RXOVERR ? "RXOVERR " : "", status == 0 ? "NULL" : "", cmd->cmd_code, cmd->arg, data ? (data->flags & DATA_DIR_WRITE ? 'w' : 'r') : '-', data ? data->blks * data->blksize : 0, data ? data->blksize : 0 ); } } else { cmd->err = RT_EOK; LOG_D("sta:0x%08X [%08X %08X %08X %08X]", status, cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]); } } /** * @brief this function transfer data by dma. * @param sdio rt_hw_sdio * @param pkg sdio package * @retval none */ static void rt_hw_sdio_transfer_by_dma(struct rt_hw_sdio *sdio, struct sdio_pkg *pkg) { struct rt_mmcsd_data *data; int size; void *buff; struct at32_sdio *hw_sdio; if ((RT_NULL == pkg) || (RT_NULL == sdio)) { LOG_E("rt_hw_sdio_transfer_by_dma invalid args"); return; } data = pkg->cmd->data; if (RT_NULL == data) { LOG_E("rt_hw_sdio_transfer_by_dma invalid args"); return; } buff = pkg->buff; if (RT_NULL == buff) { LOG_E("rt_hw_sdio_transfer_by_dma invalid args"); return; } hw_sdio = sdio->sdio_des.hw_sdio; size = data->blks * data->blksize; if (data->flags & DATA_DIR_WRITE) { sdio->sdio_des.txconfig((rt_uint32_t *)buff, (rt_uint32_t *)&hw_sdio->fifo, size); hw_sdio->dctrl |= HW_SDIO_DMA_ENABLE; } else if (data->flags & DATA_DIR_READ) { sdio->sdio_des.rxconfig((rt_uint32_t *)&hw_sdio->fifo, (rt_uint32_t *)buff, size); hw_sdio->dctrl |= HW_SDIO_DMA_ENABLE | HW_SDIO_DPSM_ENABLE; } } /** * @brief this function send command. * @param sdio rt_hw_sdio * @param pkg sdio package * @retval none */ static void rt_hw_sdio_send_command(struct rt_hw_sdio *sdio, struct sdio_pkg *pkg) { struct rt_mmcsd_cmd *cmd = pkg->cmd; struct rt_mmcsd_data *data = cmd->data; struct at32_sdio *hw_sdio = sdio->sdio_des.hw_sdio; rt_uint32_t reg_cmd; /* save pkg */ sdio->pkg = pkg; LOG_D("CMD:%d ARG:0x%08x RES:%s%s%s%s%s%s%s%s%s rw:%c len:%d blksize:%d", cmd->cmd_code, cmd->arg, resp_type(cmd) == RESP_NONE ? "NONE" : "", resp_type(cmd) == RESP_R1 ? "R1" : "", resp_type(cmd) == RESP_R1B ? "R1B" : "", resp_type(cmd) == RESP_R2 ? "R2" : "", resp_type(cmd) == RESP_R3 ? "R3" : "", resp_type(cmd) == RESP_R4 ? "R4" : "", resp_type(cmd) == RESP_R5 ? "R5" : "", resp_type(cmd) == RESP_R6 ? "R6" : "", resp_type(cmd) == RESP_R7 ? "R7" : "", data ? (data->flags & DATA_DIR_WRITE ? 'w' : 'r') : '-', data ? data->blks * data->blksize : 0, data ? data->blksize : 0 ); /* config cmd reg */ reg_cmd = cmd->cmd_code | HW_SDIO_CPSM_ENABLE; if (resp_type(cmd) == RESP_NONE) reg_cmd |= HW_SDIO_RESPONSE_NO; else if (resp_type(cmd) == RESP_R2) reg_cmd |= HW_SDIO_RESPONSE_LONG; else reg_cmd |= HW_SDIO_RESPONSE_SHORT; /* config data reg */ if (data != RT_NULL) { rt_uint32_t dir = 0; rt_uint32_t size = data->blks * data->blksize; int order; hw_sdio->dctrl = 0; hw_sdio->dtimer = HW_SDIO_DATATIMEOUT; hw_sdio->dlen = size; order = get_order(data->blksize); dir = (data->flags & DATA_DIR_READ) ? HW_SDIO_TO_HOST : 0; hw_sdio->dctrl = /* HW_SDIO_IO_ENABLE | */ (order << 4) | dir; } /* transfer config */ if (data != RT_NULL) { rt_hw_sdio_transfer_by_dma(sdio, pkg); } /* open irq */ hw_sdio->mask |= HW_SDIO_IT_CMDSENT | HW_SDIO_IT_CMDREND | HW_SDIO_ERRORS; if (data != RT_NULL) { hw_sdio->mask |= HW_SDIO_IT_DATAEND; } /* send cmd */ hw_sdio->arg = cmd->arg; hw_sdio->cmd = reg_cmd; /* wait completed */ rt_hw_sdio_wait_completed(sdio); /* waiting for data to be sent to completion */ if (data != RT_NULL) { volatile rt_uint32_t count = SDIO_TX_RX_COMPLETE_TIMEOUT_LOOPS; while (count && (hw_sdio->sta & (HW_SDIO_IT_TXACT | HW_SDIO_IT_RXACT))) { count--; } if ((count == 0) || (hw_sdio->sta & HW_SDIO_ERRORS)) { cmd->err = -RT_ERROR; } } /* close irq, keep sdio irq */ hw_sdio->mask = hw_sdio->mask & HW_SDIO_IT_SDIOIT ? HW_SDIO_IT_SDIOIT : 0x00; /* clear pkg */ sdio->pkg = RT_NULL; } /** * @brief this function send sdio request. * @param sdio rt_hw_sdio * @param req request * @retval none */ static void rt_hw_sdio_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req) { struct sdio_pkg pkg; struct rt_hw_sdio *sdio = host->private_data; struct rt_mmcsd_data *data; RT_HW_SDIO_LOCK(sdio); if (req->cmd != RT_NULL) { memset(&pkg, 0, sizeof(pkg)); data = req->cmd->data; pkg.cmd = req->cmd; if (data != RT_NULL) { rt_uint32_t size = data->blks * data->blksize; RT_ASSERT(size <= SDIO_BUFF_SIZE); pkg.buff = data->buf; if ((rt_uint32_t)data->buf & (SDIO_ALIGN_LEN - 1)) { pkg.buff = cache_buf; if (data->flags & DATA_DIR_WRITE) { memcpy(cache_buf, data->buf, size); } } } rt_hw_sdio_send_command(sdio, &pkg); if ((data != RT_NULL) && (data->flags & DATA_DIR_READ) && ((rt_uint32_t)data->buf & (SDIO_ALIGN_LEN - 1))) { memcpy(data->buf, cache_buf, data->blksize * data->blks); } } if (req->stop != RT_NULL) { memset(&pkg, 0, sizeof(pkg)); pkg.cmd = req->stop; rt_hw_sdio_send_command(sdio, &pkg); } RT_HW_SDIO_UNLOCK(sdio); mmcsd_req_complete(sdio->host); } /** * @brief this function config sdio. * @param host rt_mmcsd_host * @param io_cfg rt_mmcsd_io_cfg * @retval none */ static void rt_hw_sdio_iocfg(struct rt_mmcsd_host *host, struct rt_mmcsd_io_cfg *io_cfg) { rt_uint32_t clkcr, div, clk_src; rt_uint32_t clk = io_cfg->clock; struct rt_hw_sdio *sdio = host->private_data; struct at32_sdio *hw_sdio = sdio->sdio_des.hw_sdio; clk_src = sdio->sdio_des.clk_get(sdio->sdio_des.hw_sdio); if (clk_src < 400 * 1000) { LOG_E("The clock rate is too low! rata:%d", clk_src); return; } if (clk > host->freq_max) clk = host->freq_max; if (clk > clk_src) { LOG_W("Setting rate is greater than clock source rate."); clk = clk_src; } LOG_D("clk:%d width:%s%s%s power:%s%s%s", clk, io_cfg->bus_width == MMCSD_BUS_WIDTH_8 ? "8" : "", io_cfg->bus_width == MMCSD_BUS_WIDTH_4 ? "4" : "", io_cfg->bus_width == MMCSD_BUS_WIDTH_1 ? "1" : "", io_cfg->power_mode == MMCSD_POWER_OFF ? "OFF" : "", io_cfg->power_mode == MMCSD_POWER_UP ? "UP" : "", io_cfg->power_mode == MMCSD_POWER_ON ? "ON" : "" ); RT_HW_SDIO_LOCK(sdio); div = clk_src / clk; if ((clk == 0) || (div == 0)) { clkcr = 0; } else { if (div < 2) { div = 2; } else if (div > 0x3FF) { div = 0x3FF; } div -= 2; clkcr = (div & 0xFF) | ((div & 0x300) << 7) | HW_SDIO_CLK_ENABLE; } if (io_cfg->bus_width == MMCSD_BUS_WIDTH_8) { clkcr |= HW_SDIO_BUSWIDE_8B; } else if (io_cfg->bus_width == MMCSD_BUS_WIDTH_4) { clkcr |= HW_SDIO_BUSWIDE_4B; } else { clkcr |= HW_SDIO_BUSWIDE_1B; } hw_sdio->clkcr = clkcr; switch (io_cfg->power_mode) { case MMCSD_POWER_OFF: hw_sdio->power = HW_SDIO_POWER_OFF; break; case MMCSD_POWER_UP: hw_sdio->power = HW_SDIO_POWER_UP; break; case MMCSD_POWER_ON: hw_sdio->power = HW_SDIO_POWER_ON; break; default: LOG_W("unknown power_mode %d", io_cfg->power_mode); break; } RT_HW_SDIO_UNLOCK(sdio); } /** * @brief this function update sdio interrupt. * @param host rt_mmcsd_host * @param enable * @retval none */ void rt_hw_sdio_irq_update(struct rt_mmcsd_host *host, rt_int32_t enable) { struct rt_hw_sdio *sdio = host->private_data; struct at32_sdio *hw_sdio = sdio->sdio_des.hw_sdio; if (enable) { LOG_D("enable sdio irq"); hw_sdio->mask |= HW_SDIO_IT_SDIOIT; } else { LOG_D("disable sdio irq"); hw_sdio->mask &= ~HW_SDIO_IT_SDIOIT; } } /** * @brief this function delect sdcard. * @param host rt_mmcsd_host * @retval 0x01 */ static rt_int32_t rt_hw_sd_delect(struct rt_mmcsd_host *host) { LOG_D("try to detect device"); return 0x01; } /** * @brief this function interrupt process function. * @param host rt_mmcsd_host * @retval none */ void rt_hw_sdio_irq_process(struct rt_mmcsd_host *host) { int complete = 0; struct rt_hw_sdio *sdio = host->private_data; struct at32_sdio *hw_sdio = sdio->sdio_des.hw_sdio; rt_uint32_t intstatus = hw_sdio->sta; if (intstatus & HW_SDIO_ERRORS) { hw_sdio->icr = HW_SDIO_ERRORS; complete = 1; } else { if (intstatus & HW_SDIO_IT_CMDREND) { hw_sdio->icr = HW_SDIO_IT_CMDREND; if (sdio->pkg != RT_NULL) { if (!sdio->pkg->cmd->data) { complete = 1; } else if ((sdio->pkg->cmd->data->flags & DATA_DIR_WRITE)) { hw_sdio->dctrl |= HW_SDIO_DPSM_ENABLE; } } } if (intstatus & HW_SDIO_IT_CMDSENT) { hw_sdio->icr = HW_SDIO_IT_CMDSENT; if (resp_type(sdio->pkg->cmd) == RESP_NONE) { complete = 1; } } if (intstatus & HW_SDIO_IT_DATAEND) { hw_sdio->icr = HW_SDIO_IT_DATAEND; complete = 1; } } if ((intstatus & HW_SDIO_IT_SDIOIT) && (hw_sdio->mask & HW_SDIO_IT_SDIOIT)) { hw_sdio->icr = HW_SDIO_IT_SDIOIT; sdio_irq_wakeup(host); } if (complete) { hw_sdio->mask &= ~HW_SDIO_ERRORS; rt_event_send(&sdio->event, intstatus); } } static const struct rt_mmcsd_host_ops ops = { rt_hw_sdio_request, rt_hw_sdio_iocfg, rt_hw_sd_delect, rt_hw_sdio_irq_update, }; /** * @brief this function create mmcsd host. * @param sdio_des at32_sdio_des * @retval rt_mmcsd_host */ struct rt_mmcsd_host *sdio_host_create(struct at32_sdio_des *sdio_des) { struct rt_mmcsd_host *host; struct rt_hw_sdio *sdio = RT_NULL; if ((sdio_des == RT_NULL) || (sdio_des->txconfig == RT_NULL) || (sdio_des->rxconfig == RT_NULL)) { LOG_E("L:%d F:%s %s %s %s", (sdio_des == RT_NULL ? "sdio_des is NULL" : ""), (sdio_des ? (sdio_des->txconfig ? "txconfig is NULL" : "") : ""), (sdio_des ? (sdio_des->rxconfig ? "rxconfig is NULL" : "") : "") ); return RT_NULL; } sdio = rt_malloc(sizeof(struct rt_hw_sdio)); if (sdio == RT_NULL) { LOG_E("L:%d F:%s malloc rt_hw_sdio fail"); return RT_NULL; } rt_memset(sdio, 0, sizeof(struct rt_hw_sdio)); host = mmcsd_alloc_host(); if (host == RT_NULL) { LOG_E("L:%d F:%s mmcsd alloc host fail"); rt_free(sdio); return RT_NULL; } rt_memcpy(&sdio->sdio_des, sdio_des, sizeof(struct at32_sdio_des)); sdio->sdio_des.hw_sdio = (sdio_des->hw_sdio == RT_NULL ? (struct at32_sdio *)SDIO_BASE_ADDRESS : sdio_des->hw_sdio); sdio->sdio_des.clk_get = (sdio_des->clk_get == RT_NULL ? at32_sdio_clk_get : sdio_des->clk_get); rt_event_init(&sdio->event, "sdio", RT_IPC_FLAG_FIFO); rt_mutex_init(&sdio->mutex, "sdio", RT_IPC_FLAG_PRIO); /* set host defautl attributes */ host->ops = &ops; host->freq_min = 400 * 1000; host->freq_max = SDIO_MAX_FREQ; host->valid_ocr = 0X00FFFF80;/* the voltage range supported is 1.65v-3.6v */ #ifndef SDIO_USING_1_BIT host->flags = MMCSD_BUSWIDTH_4 | MMCSD_MUTBLKWRITE | MMCSD_SUP_SDIO_IRQ; #else host->flags = MMCSD_MUTBLKWRITE | MMCSD_SUP_SDIO_IRQ; #endif host->max_seg_size = SDIO_BUFF_SIZE; host->max_dma_segs = 1; host->max_blk_size = 512; host->max_blk_count = 512; /* link up host and sdio */ sdio->host = host; host->private_data = sdio; rt_hw_sdio_irq_update(host, 1); /* ready to change */ mmcsd_change(host); return host; } /** * @brief this function configures the dmatx. * @param src: pointer to the source buffer * @param dst: pointer to the destination buffer * @param buffer_size: size of tx buffer * @retval none */ void sd_lowlevel_dmatx_config(uint32_t *src, uint32_t *dst, uint32_t buffer_size) { static uint32_t size = 0; dma_init_type dma_init_struct; size += buffer_size * 4; sdio_obj.cfg = &sdio_config; dma_default_para_init(&dma_init_struct); sdio_obj.dma.handle_tx = sdio_config.dma_tx.dma_channel; dma_init_struct.direction = DMA_DIR_MEMORY_TO_PERIPHERAL; dma_init_struct.buffer_size = buffer_size; dma_init_struct.memory_base_addr = (uint32_t)src; dma_init_struct.memory_data_width = DMA_MEMORY_DATA_WIDTH_WORD; dma_init_struct.memory_inc_enable = TRUE; dma_init_struct.peripheral_base_addr = (uint32_t)dst; dma_init_struct.peripheral_data_width = DMA_PERIPHERAL_DATA_WIDTH_WORD; dma_init_struct.peripheral_inc_enable = FALSE; dma_init_struct.priority = DMA_PRIORITY_MEDIUM; nvic_irq_enable(sdio_config.dma_tx.dma_irq, 2, 0); dma_init(sdio_obj.dma.handle_tx, &dma_init_struct); dma_interrupt_enable(sdio_obj.dma.handle_tx, DMA_FDT_INT, TRUE); #if defined (SOC_SERIES_AT32F435) || defined (SOC_SERIES_AT32F437) dmamux_init(sdio_config.dma_tx.dmamux_channel, sdio_config.dma_tx.dmamux_id); dmamux_enable(sdio_config.dma_tx.dma_x, TRUE); #endif dma_channel_enable(sdio_obj.dma.handle_tx, TRUE); } /** * @brief this function configures the dmarx. * @param src: pointer to the source buffer * @param dst: pointer to the destination buffer * @param buffer_size: size of rx buffer * @retval none */ void sd_lowlevel_dmarx_config(uint32_t *src, uint32_t *dst, uint32_t buffer_size) { sdio_obj.cfg = &sdio_config; dma_init_type dma_init_struct; dma_default_para_init(&dma_init_struct); sdio_obj.dma.handle_rx = sdio_config.dma_rx.dma_channel; dma_init_struct.direction = DMA_DIR_PERIPHERAL_TO_MEMORY; dma_init_struct.buffer_size = buffer_size; dma_init_struct.memory_base_addr = (uint32_t)dst; dma_init_struct.memory_data_width = DMA_MEMORY_DATA_WIDTH_WORD; dma_init_struct.memory_inc_enable = TRUE; dma_init_struct.peripheral_base_addr = (uint32_t)src; dma_init_struct.peripheral_data_width = DMA_PERIPHERAL_DATA_WIDTH_WORD; dma_init_struct.peripheral_inc_enable = FALSE; dma_init_struct.priority = DMA_PRIORITY_MEDIUM; nvic_irq_enable(sdio_config.dma_rx.dma_irq, 2, 0); dma_init(sdio_obj.dma.handle_rx, &dma_init_struct); dma_interrupt_enable(sdio_obj.dma.handle_rx, DMA_FDT_INT, TRUE); #if defined (SOC_SERIES_AT32F435) || defined (SOC_SERIES_AT32F437) dmamux_init(sdio_config.dma_rx.dmamux_channel, sdio_config.dma_rx.dmamux_id); dmamux_enable(sdio_config.dma_rx.dma_x, TRUE); #endif dma_channel_enable(sdio_obj.dma.handle_rx, TRUE); } #if defined (SOC_SERIES_AT32F435) || defined (SOC_SERIES_AT32F437) void DMA2_Channel4_IRQHandler(void) #else void DMA2_Channel4_5_IRQHandler(void) #endif { if(dma_flag_get(DMA2_FDT4_FLAG)) { dma_flag_clear(DMA2_FDT4_FLAG); dma_channel_enable(sdio_config.dma_rx.dma_channel, FALSE); } } /** * @brief this function get at32 sdio clock. * @param hw_sdio: at32_sdio * @retval ahb frequency */ static rt_uint32_t at32_sdio_clock_get(struct at32_sdio *hw_sdio) { crm_clocks_freq_type clocks; crm_clocks_freq_get(&clocks); return clocks.ahb_freq; } static rt_err_t dma_tx_config(rt_uint32_t *src, rt_uint32_t *dst, int size) { sd_lowlevel_dmatx_config((uint32_t *)src, (uint32_t *)dst, size / 4); return RT_EOK; } static rt_err_t dma_rx_config(rt_uint32_t *src, rt_uint32_t *dst, int size) { sd_lowlevel_dmarx_config((uint32_t *)src, (uint32_t *)dst, size / 4); return RT_EOK; } void SDIO1_IRQHandler(void) { /* enter interrupt */ rt_interrupt_enter(); rt_hw_sdio_irq_process(host); /* leave interrupt */ rt_interrupt_leave(); } int rt_hw_sdio_init(void) { struct at32_sdio_des sdio_des; struct at32_sdio_config hsd; hsd.sdio_x = SDCARD_INSTANCE; at32_msp_sdio_init((void *)(hsd.sdio_x)); nvic_irq_enable(SDIO1_IRQn, 2, 0); sdio_des.clk_get = at32_sdio_clock_get; sdio_des.hw_sdio = (struct at32_sdio *)SDCARD_INSTANCE; sdio_des.rxconfig = dma_rx_config; sdio_des.txconfig = dma_tx_config; host = sdio_host_create(&sdio_des); if (host == RT_NULL) { LOG_E("host create fail"); return -1; } return 0; } INIT_DEVICE_EXPORT(rt_hw_sdio_init); void at32_mmcsd_change(void) { mmcsd_change(host); } #endif