CTL_SD_MEM_CARD_OPT
val = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT);
sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, val);
u16 num, val = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT);
case CTL_SD_MEM_CARD_OPT:
u16 reg = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT)
sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, reg);
card_opt = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT);
sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, card_opt);
u16 val = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT);