AT91_UDP_FORCESTALL
if (__raw_readl(ep->creg) & AT91_UDP_FORCESTALL)
tmp |= CLR_FX | AT91_UDP_FORCESTALL;
tmp &= ~(SET_FX | AT91_UDP_FORCESTALL);
csr |= AT91_UDP_FORCESTALL;
csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_FORCESTALL);
__raw_writel(csr | AT91_UDP_FORCESTALL, creg);
csr |= AT91_UDP_FORCESTALL;
csr &= ~AT91_UDP_FORCESTALL;