PHY_M_EC_S_DSC
#define PHY_M_EC_S_DSC(x) ((u16)(x)<<8) /* 00=dis; 01=1x; 10=2x; 11=3x */
#define PHY_M_EC_S_DSC(x) ((u16)(x)<<8 & PHY_M_EC_S_DSC_MSK)