AM3352: eMMC configuration in U-boot

     I make a am335x board , boot start by spiflash.
     now i wang to connect emmc by mmc1, so i amend uboot code
     first step: mmc dev 1
     second step :mmcinfo   

      now system crash first step

i amend mux.c

static struct module_pin_mux mmc1_pin_mux[] = {

        {OFFSET(gpmc_ad11), (MODE(2) | RXACTIVE | PULLUP_EN)},        /* MMC1_DAT3 */
        {OFFSET(gpmc_ad10), (MODE(2) | RXACTIVE | PULLUP_EN)},        /* MMC1_DAT2 */
        {OFFSET(gpmc_ad9), (MODE(2) | RXACTIVE | PULLUP_EN)},        /* MMC1_DAT1 */
        {OFFSET(gpmc_ad8), (MODE(2) | RXACTIVE | PULLUP_EN)},        /* MMC1_DAT0 */
        {OFFSET(gpmc_csn1), (MODE(2) | RXACTIVE | PULLUP_EN)},        /* MMC1_CLK */
        {OFFSET(gpmc_csn2), (MODE(2) | RXACTIVE | PULLUP_EN)},        /* MMC1_CMD */
        {OFFSET(gpmc_csn0), (MODE(7) | RXACTIVE | PULLUP_EN)},        /* MMC1_WP */
        {OFFSET(gpmc_advn_ale), (MODE(7) | RXACTIVE | PULLUP_EN)},        /* MMC1_CD */
        {OFFSET(mcasp0_aclkx), (MODE(6) | RXACTIVE| PULLUP_EN)},
        {-1},
};（warning! there  is GPMC_AD8-9-10-11）

configure_module_pin_mux(mmc1_pin_mux);

 i found system crash at mmc_init_setup()      ,    crash when to read regist......
static int mmc_init_setup(struct mmc *mmc)
{
        struct hsmmc *mmc_base = (struct hsmmc *)mmc->priv;
        unsigned int reg_val;
        unsigned int dsor;
        ulong start;
        mmc_board_init(mmc);
            writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET,
                &mmc_base->sysconfig);
        start = get_timer(0);
        while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0) {
                if (get_timer(0) - start > MAX_RETRY_MS) {
                        printf("%s: timedout waiting for cc2!\n", __func__);
                        return TIMEOUT;
                }
        }。。。。。。。

。。。。。。。。。。。。

ti-sdk-am335x-evm-06.00.00.00-Linux-x86-Install.bin