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software/liblitesdcard: Add SDCARD_CMD25_SUPPORT #define to allow disabling/enabling Multiple Block Writes and implement Multiple Block Writes.

This commit is contained in:
Florent Kermarrec 2021-04-09 19:34:13 +02:00
parent 5cdf621367
commit 15cf4d75e9
1 changed files with 24 additions and 9 deletions
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31
litex/soc/software/liblitesdcard/sdcard.c
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@ -23,6 +23,7 @@
//#define SDCARD_DEBUG
//#define SDCARD_CMD23_SUPPORT /* SET_BLOCK_COUNT */
#define SDCARD_CMD18_SUPPORT /* READ_MULTIPLE_BLOCK */
#define SDCARD_CMD25_SUPPORT /* WRITE_MULTIPLE_BLOCK */
#ifndef SDCARD_CLK_FREQ_INIT
#define SDCARD_CLK_FREQ_INIT 400000
@ -499,7 +500,7 @@ void sdcard_read(uint32_t block, uint32_t count, uint8_t* buf)
/* Wait for DMA Writer to complete */
while ((sdblock2mem_dma_done_read() & 0x1) == 0);
/* Stop transmission (Only for multiple block reads). */
/* Stop transmission (Only for multiple block reads) */
if (nblocks > 1)
sdcard_stop_transmission();
@ -522,24 +523,38 @@ void sdcard_read(uint32_t block, uint32_t count, uint8_t* buf)
void sdcard_write(uint32_t block, uint32_t count, uint8_t* buf)
{
while (count--) {
while (count) {
uint32_t nblocks;
#ifdef SDCARD_CMD25_SUPPORT
nblocks = count;
#else
nblocks = 1;
#endif
/* Initialize DMA Reader */
sdmem2block_dma_enable_write(0);
sdmem2block_dma_base_write((uint64_t)(uintptr_t) buf);
sdmem2block_dma_length_write(512);
sdmem2block_dma_length_write(512*nblocks);
sdmem2block_dma_enable_write(1);
/* Write Single Block to SDCard */
/* Write Block(s) to SDCard */
#ifdef SDCARD_CMD23_SUPPORT
sdcard_set_block_count(1);
sdcard_set_block_count(nblocks);
#endif
if (nblocks > 1)
sdcard_write_multiple_block(block, nblocks);
else
sdcard_write_single_block(block);
/* Stop transmission (Only for multiple block writes) */
sdcard_stop_transmission();
/* Update buf/block */
buf += 512;
block += 1;
/* Wait for DMA Reader to complete */
while ((sdmem2block_dma_done_read() & 0x1) == 0);
/* Update Block/Buffer/Count */
block += nblocks;
buf += 512*nblocks;
count -= nblocks;
}
}
#endif