Lines Matching refs:rx_prologue
97 * @rx_prologue: bytes received without DMA if first RX sglist entry's
137 int rx_prologue;
481 bs->rx_prologue = 0;
488 bs->rx_prologue = sg_dma_len(&tfr->rx_sg.sgl[0]) & 3;
490 if (bs->rx_prologue > bs->tx_prologue) {
492 bs->tx_prologue = bs->rx_prologue;
501 /* rx_prologue > 0 implies tx_prologue > 0, so check only the latter */
506 if (bs->rx_prologue) {
507 bcm2835_wr(bs, BCM2835_SPI_DLEN, bs->rx_prologue);
510 bcm2835_wr_fifo_count(bs, bs->rx_prologue);
512 bcm2835_rd_fifo_count(bs, bs->rx_prologue);
519 bs->rx_prologue, DMA_FROM_DEVICE);
521 sg_dma_address(&tfr->rx_sg.sgl[0]) += bs->rx_prologue;
522 sg_dma_len(&tfr->rx_sg.sgl[0]) -= bs->rx_prologue;
532 tx_remaining = bs->tx_prologue - bs->rx_prologue;
568 if (bs->rx_prologue) {
569 sg_dma_address(&tfr->rx_sg.sgl[0]) -= bs->rx_prologue;
570 sg_dma_len(&tfr->rx_sg.sgl[0]) += bs->rx_prologue;