return __rspi_can_dma(rspi, xfer);
}
+static int rspi_common_transfer(struct rspi_data *rspi,
+ struct spi_transfer *xfer)
+{
+ int ret;
+
+ if (rspi->master->can_dma && __rspi_can_dma(rspi, xfer)) {
+ /* rx_buf can be NULL on RSPI on SH in TX-only Mode */
+ return rspi_dma_transfer(rspi, &xfer->tx_sg,
+ xfer->rx_buf ? &xfer->rx_sg : NULL);
+ }
+
+ ret = rspi_pio_transfer(rspi, xfer->tx_buf, xfer->rx_buf, xfer->len);
+ if (ret < 0)
+ return ret;
+
+ /* Wait for the last transmission */
+ rspi_wait_for_tx_empty(rspi);
+
+ return 0;
+}
+
static int rspi_transfer_one(struct spi_master *master, struct spi_device *spi,
struct spi_transfer *xfer)
{
struct rspi_data *rspi = spi_master_get_devdata(master);
u8 spcr;
- int ret;
spcr = rspi_read8(rspi, RSPI_SPCR);
if (xfer->rx_buf) {
}
rspi_write8(rspi, spcr, RSPI_SPCR);
- if (master->can_dma && __rspi_can_dma(rspi, xfer))
- return rspi_dma_transfer(rspi, &xfer->tx_sg,
- xfer->rx_buf ? &xfer->rx_sg : NULL);
-
- ret = rspi_pio_transfer(rspi, xfer->tx_buf, xfer->rx_buf, xfer->len);
- if (ret < 0)
- return ret;
-
- /* Wait for the last transmission */
- rspi_wait_for_tx_empty(rspi);
-
- return 0;
+ return rspi_common_transfer(rspi, xfer);
}
static int rspi_rz_transfer_one(struct spi_master *master,
rspi_rz_receive_init(rspi);
- if (master->can_dma && __rspi_can_dma(rspi, xfer))
- return rspi_dma_transfer(rspi, &xfer->tx_sg, &xfer->rx_sg);
-
- ret = rspi_pio_transfer(rspi, xfer->tx_buf, xfer->rx_buf, xfer->len);
- if (ret < 0)
- return ret;
-
- /* Wait for the last transmission */
- rspi_wait_for_tx_empty(rspi);
-
- return 0;
+ return rspi_common_transfer(rspi, xfer);
}
static int qspi_transfer_out_in(struct rspi_data *rspi,
struct spi_transfer *xfer)
{
- int ret;
-
qspi_receive_init(rspi);
- if (rspi->master->can_dma && __rspi_can_dma(rspi, xfer))
- return rspi_dma_transfer(rspi, &xfer->tx_sg, &xfer->rx_sg);
-
- ret = rspi_pio_transfer(rspi, xfer->tx_buf, xfer->rx_buf, xfer->len);
- if (ret < 0)
- return ret;
-
- /* Wait for the last transmission */
- rspi_wait_for_tx_empty(rspi);
-
- return 0;
+ return rspi_common_transfer(rspi, xfer);
}
static int qspi_transfer_out(struct rspi_data *rspi, struct spi_transfer *xfer)