149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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*/
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#include <rtdevice.h>
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#include <rtthread.h>
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#include <dfs_fs.h>
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#include "drv_sdcard.h"
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#include "fsl_card.h"
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static sd_card_t g_sd;
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static sd_card_t *card = &g_sd;
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static struct rt_device sdcard_device;
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static struct dfs_partition part;
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static rt_err_t vega_sdcard_init(rt_device_t dev)
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{
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return RT_EOK;
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}
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static rt_err_t vega_sdcard_open(rt_device_t dev, rt_uint16_t oflag)
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{
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return RT_EOK;
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}
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static rt_err_t vega_sdcard_close(rt_device_t dev)
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{
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return RT_EOK;
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}
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static rt_ssize_t vega_sdcard_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
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{
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status_t status;
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status = SD_ReadBlocks(card, buffer, part.offset + pos, size);
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if (status == kStatus_Success) return size;
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rt_kprintf("read failed: %d, pos 0x%08x, size %d\n", status, pos, size);
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return 0;
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}
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static rt_ssize_t vega_sdcard_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
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{
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status_t status;
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status = SD_WriteBlocks(card, buffer, part.offset + pos, size);
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if (status == kStatus_Success) return size;
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rt_kprintf("write failed: %d, pos 0x%08x, size %d\n", status, pos, size);
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return 0;
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}
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static rt_err_t vega_sdcard_control(rt_device_t dev, int cmd, void *args)
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{
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if (cmd == RT_DEVICE_CTRL_BLK_GETGEOME)
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{
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struct rt_device_blk_geometry *geometry;
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geometry = (struct rt_device_blk_geometry *)args;
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if (geometry == RT_NULL) return -RT_ERROR;
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if (dev->user_data == RT_NULL) return -RT_ERROR;
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geometry->bytes_per_sector = card->blockSize;
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geometry->block_size = card->blockSize;
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geometry->sector_count = card->blockCount;
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}
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return RT_EOK;
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}
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int rt_hw_sdcard_init(void)
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{
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/* set SDHC0 clock source */
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CLOCK_SetIpSrc(kCLOCK_Sdhc0, kCLOCK_IpSrcLpFllAsync);
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/* Save host information. */
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card->host.base = USDHC0;
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card->host.sourceClock_Hz = CLOCK_GetIpFreq(kCLOCK_Sdhc0);
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/* Init card. */
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if (SD_Init(card))
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{
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rt_kprintf("SD card init failed.\r\n");
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return -1;
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}
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else
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{
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bool status;
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rt_uint8_t *sector;
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/* get the first sector to read partition table */
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sector = (rt_uint8_t *) rt_malloc(card->blockSize);
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if (sector == RT_NULL)
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{
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rt_kprintf("allocate partition sector buffer failed\n");
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return -1;
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}
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status = SD_ReadBlocks(card, sector, 0, 1);
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if (status == true)
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{
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/* get the first partition */
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if (dfs_filesystem_get_partition(&part, sector, 0) != 0)
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{
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/* there is no partition */
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part.offset = 0;
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part.size = 0;
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}
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}
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else
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{
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/* there is no partition table */
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part.offset = 0;
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part.size = 0;
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}
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/* release sector buffer */
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rt_free(sector);
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/* register sdcard device */
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sdcard_device.type = RT_Device_Class_Block;
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sdcard_device.init = vega_sdcard_init;
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sdcard_device.open = vega_sdcard_open;
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sdcard_device.close = vega_sdcard_close;
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sdcard_device.read = vega_sdcard_read;
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sdcard_device.write = vega_sdcard_write;
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sdcard_device.control = vega_sdcard_control;
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/* no private */
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sdcard_device.user_data = (void*)card;
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rt_device_register(&sdcard_device, "sd0",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
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}
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return 0;
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}
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INIT_DEVICE_EXPORT(rt_hw_sdcard_init);
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