123 lines
2.7 KiB
C
123 lines
2.7 KiB
C
/*
|
|
* sd card
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <MCF5475.h>
|
|
#include "bas_printf.h"
|
|
|
|
extern void wait(volatile uint32_t value);
|
|
|
|
#ifdef _NOT_USED_ /* disabled assembler routines */
|
|
|
|
void sd_card_idle(void)
|
|
{
|
|
__asm__ __volatile__ (
|
|
".extern sd_idle\n\t"
|
|
"bsr sd_idle\n\t"
|
|
/* output */:
|
|
/* input */ :
|
|
/* clobber */: "a0","a1","a2","a3","a4","a5",
|
|
"d0","d1","d2","d3","d4","d5","d6","d7","memory"
|
|
);
|
|
}
|
|
|
|
|
|
|
|
int sd_card_init(void)
|
|
{
|
|
register int ret __asm__("d0");
|
|
|
|
__asm__ __volatile__ (
|
|
".extern sd_init\n\t"
|
|
"bsr.l sd_init\n\t"
|
|
/* output */: "=r" (ret)
|
|
/* input */ :
|
|
/* clobber */: "a0","a1","a2","a3","a4","a5",
|
|
"d1","d2","d3","d4","d5","d6","d7","memory"
|
|
);
|
|
|
|
return ret;
|
|
}
|
|
#endif /* _NOT_USED_ */
|
|
|
|
uint32_t sd_com(uint32_t command)
|
|
{
|
|
uint32_t ret;
|
|
|
|
MCF_DSPI_DTFR = command;
|
|
|
|
while (! (MCF_DSPI_DSR & MCF_DSPI_DSR_TCF)); /* wait until DSPI transfer complete */
|
|
ret = MCF_DSPI_DRFR; /* read DSPI Rx FIFO register */
|
|
MCF_DSPI_DSR = 0xffffffff; /* clear DSPI status register */
|
|
|
|
return ret;
|
|
}
|
|
|
|
void sd_card_init(void)
|
|
{
|
|
uint32_t ret;
|
|
int i;
|
|
|
|
xprintf("SD-Card initialization: ");
|
|
|
|
MCF_PAD_PAR_DSPI = 0x1fff;
|
|
MCF_PAD_PAR_TIMER = 0xff; /*
|
|
* FIXME: really necessary or just an oversight
|
|
* that PAD_PAR_DSPI is only 16 bit?
|
|
*/
|
|
|
|
MCF_DSPI_DMCR = MCF_DSPI_DMCR_MSTR | /* 8 bit CS5 on */
|
|
MCF_DSPI_DMCR_CSIS3 |
|
|
MCF_DSPI_DMCR_CSIS2 |
|
|
MCF_DSPI_DMCR_DTXF |
|
|
MCF_DSPI_DMCR_DRXF |
|
|
MCF_DSPI_DMCR_CTXF |
|
|
MCF_DSPI_DMCR_CRXF; /* 0x800d3c00 */
|
|
|
|
MCF_DSPI_DCTAR0 = MCF_DSPI_DCTAR_TRSZ(0b111) | /* transfer size = 8 bit */
|
|
MCF_DSPI_DCTAR_PCSSCK(0b01) | /* 3 clock DSPICS to DSPISCK delay prescaler */
|
|
MCF_DSPI_DCTAR_PASC_3CLK | /* 3 clock DSPISCK to DSPICS negation prescaler */
|
|
MCF_DSPI_DCTAR_PDT_3CLK | /* 3 clock delay between DSPICS assertions prescaler */
|
|
MCF_DSPI_DCTAR_PBR_3CLK | /* 3 clock prescaler */
|
|
MCF_DSPI_DCTAR_ASC(0b1001) | /* 1024 */
|
|
MCF_DSPI_DCTAR_DT(0b1001) | /* 1024 */
|
|
MCF_DSPI_DCTAR_BR(0b0111);
|
|
/* 0x38558897 */
|
|
|
|
MCF_DSPI_DSR = 0xffffffff; /* clear DSPI status register */
|
|
wait(1000); /* wait 1ms */
|
|
|
|
MCF_DSPI_DMCR = 0xc00d3c00;
|
|
wait(10000);
|
|
|
|
MCF_DSPI_DMCR = 0x800d3c00;
|
|
for (i = 0; i < 10; i++)
|
|
{
|
|
ret = sd_com(0x082000ff);
|
|
}
|
|
|
|
MCF_DSPI_DMCR = 0x802d3c00;
|
|
for (i = 0; i < 2; i++)
|
|
{
|
|
ret = sd_com(0x08200000);
|
|
}
|
|
|
|
MCF_DSPI_DMCR = 0x800d3c00;
|
|
for (i = 0; i < 2; i++)
|
|
{
|
|
ret = sd_com(0x082000ff);
|
|
}
|
|
|
|
MCF_DSPI_DMCR = 0x800d3c00;
|
|
|
|
wait(10000);
|
|
|
|
xprintf("finished\r\n");
|
|
}
|
|
|
|
void sd_card_idle(void)
|
|
{
|
|
}
|
|
|