/* init mmc/sd card we assume that the card is in the slot */
static int mmc_init(unsigned int msc_clkrt_val)
{
int retries, ret;
u8 *resp;
//unsigned int msc_clk_div = (__cpm_get_pllout())/24000000;
__msc_reset();
mmc_init_gpio();
REG_MSC_IMASK = 0xffff;
REG_MSC_IREG = 0xffff;
REG_MSC_CLKRT = 6; //200k
/* just for reading and writing, suddenly it was reset, and the power of sd card was not broken off */
resp = mmc_cmd(12, 0, 0x41, MSC_CMDAT_RESPONSE_R1);
/* reset */
resp = mmc_cmd(0, 0, 0x80, 0);
resp = mmc_cmd(8, 0x1aa, 0x1, MSC_CMDAT_RESPONSE_R1);
resp = mmc_cmd(55, 0, 0x1, MSC_CMDAT_RESPONSE_R1);
if(resp[5] == 0x37) {
resp = mmc_cmd(41, 0x40ff8000, 0x3, MSC_CMDAT_RESPONSE_R3);
if(resp[5] == 0x3f)
ret = sd_init(msc_clkrt_val);
return ret;
}
ret = mmc_found(msc_clkrt_val);
return ret;
}
int sd_boot(num)
{
u8 *resp;
u32 ret = 0;
u32 clk_set = 0, clkrt = 0;
DBG("sd_boot\n");
current_boot = SD_BOOT;
ctl_num = num;
if (ctl_num == 1)
REG_CPM_CLKGR &= ~(1 << 11);
sd_init();
clk_set = jz_extal / 2;
while (200000 < clk_set) {
clkrt++;
clk_set >>= 1;
}
if (clkrt > 7) {
clkrt = 7;
}
REG_MSC_CLKRT(ctl_num) = clkrt;
REG_MSC_LPM(ctl_num) = 1;
/* cmd12 reset when we reading or writing from the card, send this cmd */
resp = mmc_cmd(12, 0, 0x41, MSC_CMDAT_RESPONSE_R1);
resp = mmc_cmd(0, 0, 0x80, MSC_CMDAT_RESPONSE_NONE);
resp = mmc_cmd(8, 0x1aa, 0x1, MSC_CMDAT_RESPONSE_R1);
resp = mmc_cmd(55, 0, 0x1, MSC_CMDAT_RESPONSE_R1);
if (resp[0] & 0x20){
if (resp[5] == 0x37){
resp = mmc_cmd(41, 0x40ff8000, 0x3, MSC_CMDAT_RESPONSE_R3);
if (resp[5] == 0x3f)
ret = sd_found();
else
ret = mmc_found();
} else {
ret = mmc_found();
}
} else {
ret = mmc_found();
}
if (ret)
return error_handler(current_boot);
ret = mmc_block_read(SPL_SIZE + redundancy_size, (u32 *)start_addr); //SDRAM ADDR
if(!ret)
{
if (!(REG32(start_addr) == 0x4d53504c)) {
if (ctl_num == 0)
return sd_boot(1);
if (ctl_num == 1)
return usb_boot();
} else {
return xfer_d2i(start_addr + jump_offset, SPL_SIZE);
}
} else {
return error_handler(current_boot);
}
}
