Lines Matching defs:xfer

207     struct spi_transfer *xfer; /* Store xfer temporarily */

390 static int rockchip_spi_prepare_irq(struct rockchip_spi *rs, struct spi_controller *ctlr, struct spi_transfer *xfer)

392     rs->tx = xfer->tx_buf;

393     rs->rx = xfer->rx_buf;

394     rs->tx_left = rs->tx ? xfer->len / rs->n_bytes : 0;

395     rs->rx_left = xfer->len / rs->n_bytes;

455 static int rockchip_spi_prepare_dma(struct rockchip_spi *rs, struct spi_controller *ctlr, struct spi_transfer *xfer)

461     rs->tx = xfer->tx_buf;

462     rs->rx = xfer->rx_buf;

465     if (xfer->rx_buf) {

470             .src_maxburst = rockchip_spi_calc_burst_size(xfer->len / rs->n_bytes),

475         rxdesc = dmaengine_prep_slave_sg(ctlr->dma_rx, xfer->rx_sg.sgl, xfer->rx_sg.nents, DMA_DEV_TO_MEM,

486     if (xfer->tx_buf) {

496         txdesc = dmaengine_prep_slave_sg(ctlr->dma_tx, xfer->tx_sg.sgl, xfer->tx_sg.nents, DMA_MEM_TO_DEV,

532 static int rockchip_spi_config(struct rockchip_spi *rs, struct spi_device *spi, struct spi_transfer *xfer, bool use_dma,

554     if (xfer->rx_buf && xfer->tx_buf) {

556     } else if (xfer->rx_buf) {

562     switch (xfer->bits_per_word) {

565             cr1 = xfer->len - 1;

569             cr1 = xfer->len - 1;

573             cr1 = xfer->len / ROCKCHIP_XFER_LEN_DIV - 1;

580             dev_err(rs->dev, "unknown bits per word: %d\n", xfer->bits_per_word);

585         if (xfer->tx_buf) {

588         if (xfer->rx_buf) {

612     if ((xfer->len / rs->n_bytes) < rs->fifo_len) {

613         writel_relaxed(xfer->len / rs->n_bytes - 1, rs->regs + ROCKCHIP_SPI_RXFTLR);

619     writel_relaxed(rockchip_spi_calc_burst_size(xfer->len / rs->n_bytes) - 1, rs->regs + ROCKCHIP_SPI_DMARDLR);

626     writel_relaxed(ROCKCHIP_SPI_BAUDRATE_MUL * DIV_ROUND_UP(rs->freq, ROCKCHIP_SPI_BAUDRATE_MUL * xfer->speed_hz),

656             rs->rx = rs->xfer->rx_buf;

657             rs->xfer->len = 0;

664             rs->rx += rs->xfer->len - rs->n_bytes * state.residue;

668     /* Get the valid data left in rx fifo and set rs->xfer->len real rx size */

682         rs->xfer->len = (unsigned int)(rs->rx - rs->xfer->rx_buf);

694 static int rockchip_spi_transfer_one(struct spi_controller *ctlr, struct spi_device *spi, struct spi_transfer *xfer)

702     if (!xfer->tx_buf && !xfer->rx_buf) {

707     if (xfer->len > ROCKCHIP_SPI_MAX_TRANLEN) {

708         dev_err(rs->dev, "Transfer is too long (%d)\n", xfer->len);

712     rs->n_bytes = xfer->bits_per_word <= 8 ? 1 : 2;

713     rs->xfer = xfer;

714     use_dma = ctlr->can_dma ? ctlr->can_dma(ctlr, spi, xfer) : false;

716     ret = rockchip_spi_config(rs, spi, xfer, use_dma, ctlr->slave);

722         return rockchip_spi_prepare_dma(rs, ctlr, xfer);

725     return rockchip_spi_prepare_irq(rs, ctlr, xfer);

728 static bool rockchip_spi_can_dma(struct spi_controller *ctlr, struct spi_device *spi, struct spi_transfer *xfer)

731     unsigned int bytes_per_word = xfer->bits_per_word <= 8 ? 1 : 2;

737     return xfer->len / bytes_per_word >= rs->fifo_len;