DRESULT disk_read (
BYTE pdrv, /* Physical drive nmuber to identify the drive */
BYTE *buff, /* Data buffer to store read data */
DWORD sector, /* Sector address in LBA */
UINT count /* Number of sectors to read */
)
{
switch (pdrv) {
#if HAL_USE_MMC_SPI
case MMC:
if (blkGetDriverState(&MMCD1) != BLK_READY)
return RES_NOTRDY;
if (mmcStartSequentialRead(&MMCD1, sector))
return RES_ERROR;
while (count > 0) {
if (mmcSequentialRead(&MMCD1, buff))
return RES_ERROR;
buff += MMCSD_BLOCK_SIZE;
count--;
}
if (mmcStopSequentialRead(&MMCD1))
return RES_ERROR;
return RES_OK;
#else
case SDC:
if (blkGetDriverState(&SDCD1) != BLK_READY)
return RES_NOTRDY;
if (sdcRead(&SDCD1, sector, buff, count))
return RES_ERROR;
return RES_OK;
#endif
}
return RES_PARERR;
}
DRESULT disk_readp (
BYTE* buff, /* [OUT] Pointer to the read buffer */
DWORD sector, /* [IN] Sector number */
UINT offset, /* [IN] Byte offset in the sector to start to read */
UINT count /* [IN] Number of bytes to read */
) {
if (sector != sectpos) {
#if HAL_USE_MMC_SPI
if (blkGetDriverState(&MMCD1) != BLK_READY)
return RES_NOTRDY;
if (mmcStartSequentialRead(&MMCD1, sector))
return RES_ERROR;
if (mmcSequentialRead(&MMCD1, sectBuf))
return RES_ERROR;
if (mmcStopSequentialRead(&MMCD1))
return RES_ERROR;
#else
if (blkGetDriverState(&SDCD1) != BLK_READY)
return RES_NOTRDY;
if (sdcRead(&SDCD1, sector, sectBuf, 1))
return RES_ERROR;
#endif
sectpos = sector;
}
memcpy(buff, sectBuf + offset, count);
return RES_OK;
}
DRESULT disk_read (
BYTE drv, /* Physical drive nmuber (0..) */
BYTE *buff, /* Data buffer to store read data */
DWORD sector, /* Sector address (LBA) */
BYTE count /* Number of sectors to read (1..255) */
)
{
switch (drv) {
#if HAL_USE_MMC_SPI
case MMC:
if (mmcGetDriverState(&MMCD1) != MMC_READY)
return RES_NOTRDY;
if (mmcStartSequentialRead(&MMCD1, sector))
return RES_ERROR;
while (count > 0) {
if (mmcSequentialRead(&MMCD1, buff))
return RES_ERROR;
buff += MMC_SECTOR_SIZE;
count--;
}
if (mmcStopSequentialRead(&MMCD1))
return RES_ERROR;
return RES_OK;
#else
case SDC:
if (sdcGetDriverState(&SDCD1) != SDC_ACTIVE)
return RES_NOTRDY;
if (sdcRead(&SDCD1, sector, buff, count))
return RES_ERROR;
return RES_OK;
#endif
}
return RES_PARERR;
}
static int spi_bread(struct ext4_blockdev *bdev, void *buf, uint64_t blk_id,
uint32_t blk_cnt)
{
(void)bdev;
uint64_t v = tim_get_us();
if (mmcStartSequentialRead(&MMCD1, blk_id) != HAL_SUCCESS)
return EIO;
while (blk_cnt) {
if (mmcSequentialRead(&MMCD1, buf) != HAL_SUCCESS)
return EIO;
buf += SPI_BLOCK_SIZE;
blk_cnt--;
}
if (mmcStopSequentialRead(&MMCD1) != HAL_SUCCESS)
return EIO;
io_timings.acc_bread += tim_get_us() - v;
io_timings.cnt_bread++;
io_timings.av_bread = io_timings.acc_bread / io_timings.cnt_bread;
return EOK;
}
static int spi_open(struct ext4_blockdev *bdev)
{
(void)bdev;
static uint8_t mbr[512];
struct part_tab_entry *part0;
if (mmcConnect(&MMCD1) != HAL_SUCCESS)
return EIO;
if (mmcStartSequentialRead(&MMCD1, 0) != HAL_SUCCESS)
return EIO;
if (mmcSequentialRead(&MMCD1, mbr) != HAL_SUCCESS)
return EIO;
if (mmcStopSequentialRead(&MMCD1) != HAL_SUCCESS)
return EIO;
part0 = (struct part_tab_entry *)(mbr + MBR_PART_TABLE_OFF);
part_offset = part0->first_lba;
_spi.ph_bcnt = MMCD1.capacity * SPI_BLOCK_SIZE;
return EOK;
}
static bool_t mmc_read(void *instance, uint32_t startblk,
uint8_t *buffer, uint32_t n) {
if (mmcStartSequentialRead((MMCDriver *)instance, startblk))
return CH_FAILED;
while (n > 0) {
if (mmcSequentialRead((MMCDriver *)instance, buffer))
return CH_FAILED;
buffer += MMCSD_BLOCK_SIZE;
n--;
}
if (mmcStopSequentialRead((MMCDriver *)instance))
return CH_FAILED;
return CH_SUCCESS;
}
bool_t mmc_read(void *instance, uint32_t startblk,
uint8_t *buffer, uint32_t n) {
if (mmcStartSequentialRead((MMCDriver *)instance, startblk))
return TRUE;
while (n > 0) {
if (mmcSequentialRead((MMCDriver *)instance, buffer))
return TRUE;
buffer += MMCSD_BLOCK_SIZE;
n--;
}
if (mmcStopSequentialRead((MMCDriver *)instance))
return TRUE;
return FALSE;
}
