SUN4I_MAX_XFER_SIZE
return SUN4I_MAX_XFER_SIZE - 1;
if (tfr->len > SUN4I_MAX_XFER_SIZE)
if (tfr->tx_buf && tfr->len >= SUN4I_MAX_XFER_SIZE)
#define SUN4I_BURST_CNT(cnt) ((cnt) & SUN4I_MAX_XFER_SIZE)
#define SUN4I_XMIT_CNT(cnt) ((cnt) & SUN4I_MAX_XFER_SIZE)