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software/liblitesdcard/sdcard: add FatFs disk functions.

This commit is contained in:
Florent Kermarrec 2020-06-09 17:58:43 +02:00
parent e27ed657e9
commit 04d0ba6187
1 changed files with 32 additions and 9 deletions
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41
litex/soc/software/liblitesdcard/sdcard.c
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@ -12,6 +12,8 @@
#include <generated/mem.h>
#include <system.h>
#include "fat/ff.h"
#include "fat/diskio.h"
#include "sdcard.h"
#define SDCARD_DEBUG
@ -560,9 +562,9 @@ int sdcard_sddatareader_wait(void) {
/* user */
int sdcard_init(void) {
unsigned short rca;
unsigned short rca;
/* initialize SD driver parameters */
/* initialize SD driver parameters */
sdcore_cmdtimeout_write(1<<19);
sdcore_datatimeout_write(1<<19);
@ -713,15 +715,36 @@ int sdcard_test(unsigned int blocks)
return 0;
}
uint8_t sdcard_read_block(uint32_t addr, uint8_t *buf) {
int n;
/*-----------------------------------------------------------------------*/
/* SDCard FatFs disk functions */
/*-----------------------------------------------------------------------*/
// FIXME: handle errors, avoid recopy.
static DSTATUS spisdcardstatus = STA_NOINIT;
sdcard_read(addr, 1);
for(n=0; n<SD_BLOCK_SIZE; n++)
buf[n] = sdread_buf[n];
return 1;
DSTATUS disk_status(uint8_t drv) {
if (drv) return STA_NOINIT;
return spisdcardstatus;
}
DSTATUS disk_initialize(uint8_t drv) {
uint8_t r;
if (drv) return RES_NOTRDY;
r = sdcard_init();
spisdcardstatus = r ? 0 : STA_NOINIT;
return spisdcardstatus;
}
DRESULT disk_read(uint8_t drv, uint8_t *buf, uint32_t sector, uint32_t count) {
while (count) {
sdcard_read(sector, 1);
memcpy((char*) buf, (char*) sdread_buf, SD_BLOCK_SIZE);
buf += SD_BLOCK_SIZE;
count--;
}
return RES_OK;
}
#endif /* CSR_SDCORE_BASE */