err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,1);if(err)returnerr;/* Now check to see that it worked */err =mmc_send_ext_csd(mmc, ext_csd);if(err)returnerr;/* No high-speed support */if(!ext_csd[185])return0;/* High Speed is set, there are two type...