int emmc_boot(void)
{
int ret;
current_boot = EMMC_BOOT;
ctl_num = 0;
sd_init();
REG_MSC_CLKRT(ctl_num) = 1;
REG_MSC_LPM(ctl_num) = 1;
/* cmd12 reset when we reading or writing from the card, send this cmd */
mmc_cmd(12, 0, 0x1, MSC_CMDAT_RESPONSE_R1);
mmc_cmd(0, 0xf0f0f0f0, 0x80, MSC_CMDAT_RESPONSE_NONE);
REG_MSC_BLKLEN(ctl_num) = 0x200;
REG_MSC_NOB(ctl_num) = (SPL_SIZE + redundancy_size) / 512;
mmc_cmd(0, 0xfffffffa, ((MSC_CMDAT_INIT) | (MSC_CMDAT_EXP_BOOT_ACK) | (MSC_CMDAT_BOOT_MODE_A) | (MSC_CMDAT_DATA_EN)), MSC_CMDAT_RESPONSE_NONE);
ret = mmc_block_readp(SPL_SIZE + redundancy_size, (u32 *)start_addr);
if(!ret){
mmc_cmd(0, 0, 0x0, MSC_CMDAT_RESPONSE_NONE);
if (!(REG32(start_addr) == 0x4d53504c)){
return sd_boot(1);
}
return xfer_d2i(start_addr + jump_offset, SPL_SIZE);
}else{
return error_handler(current_boot);
}
}
int mmc_found(void)
{
u8 *resp;
u32 timeout = 100;
DBG("mmc_found\n");
if (ctl_num == 1)
return 1;
resp = mmc_cmd(1, 0x40ff8000, 0x3, MSC_CMDAT_RESPONSE_R3);
while (timeout-- && !(resp[4] & 0x80)) {
xmdelay(10);
resp = mmc_cmd(1, 0x40ff8000, 0x3, MSC_CMDAT_RESPONSE_R3);
}
if (!(resp[4] & 0x80))
return 1;
resp = mmc_cmd(2, 0, 0x2, MSC_CMDAT_RESPONSE_R2);
resp = mmc_cmd(3, 0x10, 0x1, MSC_CMDAT_RESPONSE_R1);
REG_MSC_CLKRT(ctl_num) = 1;
resp = mmc_cmd(7, 0x10, 0x1, MSC_CMDAT_RESPONSE_R1);
resp = mmc_cmd(6, 0x3b70001, 0x41, MSC_CMDAT_RESPONSE_R1);
wait_prog_done();
return 0;
}
int sd_found(void)
{
u8 *resp;
u32 cardaddr, timeout = 1000;
DBG("sd_found\n");
resp = mmc_cmd(55, 0, 0x1, MSC_CMDAT_RESPONSE_R1);
resp = mmc_cmd(41, 0x40ff8000, 0x3, MSC_CMDAT_RESPONSE_R3);
while (timeout-- && !(resp[4] & 0x80)) {
xmdelay(10);
resp = mmc_cmd(55, 0, 0x1, MSC_CMDAT_RESPONSE_R1);
resp = mmc_cmd(41, 0x40ff8000, 0x3, MSC_CMDAT_RESPONSE_R3);
}
if (!(resp[4] & 0x80))
return 1;
resp = mmc_cmd(2, 0, 0x2, MSC_CMDAT_RESPONSE_R2);
resp = mmc_cmd(3, 0, 0x6, MSC_CMDAT_RESPONSE_R6);
cardaddr = (resp[4] << 8) | resp[3];
rca = cardaddr << 16;
REG_MSC_CLKRT(ctl_num) = 1;
resp = mmc_cmd(7, rca, 0x1, MSC_CMDAT_RESPONSE_R1);
resp = mmc_cmd(55, rca, 0x1, MSC_CMDAT_RESPONSE_R1);
resp = mmc_cmd(6, 0, 0x1, MSC_CMDAT_RESPONSE_R1);
return 0;
}
/* Select the MMC clock frequency */
static int jz_mmc_set_clock(u32 rate)
{
int clkrt;
/* __cpm_select_msc_clk_high will select 48M clock for MMC/SD card
* perhaps this will made some card with bad quality init fail,or
* bad stabilization.
*/
if (rate > SD_CLOCK_FAST) {
__cpm_select_msc_clk_high(MSC_ID,1); /* select clock source from CPM */
clkrt = jz_mmc_calc_clkrt(0, rate);
} else {
__cpm_select_msc_clk(MSC_ID,1); /* select clock source from CPM */
clkrt = jz_mmc_calc_clkrt(1, rate);
}
#ifndef CONFIG_FPGA
REG_MSC_CLKRT(MSC_ID) = clkrt;
#else
REG_MSC_CLKRT(MSC_ID) = 7;
#endif
return MMC_NO_ERROR;
}
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);
}
}