RTSX_CLK_DIVIDE_128
RTSX_WRITE(sc, RTSX_SD_CFG1, RTSX_CLK_DIVIDE_128 | RTSX_SD20_MODE);
clk_divider = RTSX_CLK_DIVIDE_128;
rtsx_write(sc, RTSX_SD_CFG1, RTSX_CLK_DIVIDE_MASK, RTSX_CLK_DIVIDE_128);
rtsx_write(sc, RTSX_SD_CFG1, RTSX_CLK_DIVIDE_MASK, RTSX_CLK_DIVIDE_128);