XWDLEN2
regs->xcr2 |= XWDLEN2(OMAP_MCBSP_WORD_16);
regs->xcr2 |= XWDLEN2(OMAP_MCBSP_WORD_32);
regs->xcr2 &= ~(RPHASE | XFRLEN2(0x7f) | XWDLEN2(7));