diff options
| -rw-r--r-- | drivers/spi/spi-dw-mid.c | 13 | ||||
| -rw-r--r-- | drivers/spi/spi-dw.c | 12 |
2 files changed, 19 insertions, 6 deletions
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index c8416ef..25c8fa7 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -100,6 +100,15 @@ static void mid_spi_dma_exit(struct dw_spi *dws) dma_release_channel(dws->rxchan); } +static enum dma_slave_buswidth convert_dma_width(u32 dma_width) { + if (dma_width == 1) + return DMA_SLAVE_BUSWIDTH_1_BYTE; + else if (dma_width == 2) + return DMA_SLAVE_BUSWIDTH_2_BYTES; + + return DMA_SLAVE_BUSWIDTH_UNDEFINED; +} + /* * dws->dma_chan_busy is set before the dma transfer starts, callback for tx * channel will clear a corresponding bit. @@ -126,7 +135,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_tx(struct dw_spi *dws) txconf.dst_addr = dws->dma_addr; txconf.dst_maxburst = LNW_DMA_MSIZE_16; txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - txconf.dst_addr_width = dws->dma_width; + txconf.dst_addr_width = convert_dma_width(dws->dma_width); txconf.device_fc = false; dmaengine_slave_config(dws->txchan, &txconf); @@ -175,7 +184,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws) rxconf.src_addr = dws->dma_addr; rxconf.src_maxburst = LNW_DMA_MSIZE_16; rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - rxconf.src_addr_width = dws->dma_width; + rxconf.src_addr_width = convert_dma_width(dws->dma_width); rxconf.device_fc = false; dmaengine_slave_config(dws->rxchan, &rxconf); diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index 950bc50..f3e4092 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -315,7 +315,6 @@ static int dw_spi_transfer_one(struct spi_master *master, { struct dw_spi *dws = spi_master_get_devdata(master); struct chip_data *chip = spi_get_ctldata(spi); - u8 bits = 0; u8 imask = 0; u8 cs_change = 0; u16 txlevel = 0; @@ -357,9 +356,14 @@ static int dw_spi_transfer_one(struct spi_master *master, } } if (transfer->bits_per_word) { - bits = transfer->bits_per_word; - dws->n_bytes = dws->dma_width = bits >> 3; - cr0 = (bits - 1) + if (transfer->bits_per_word == 8) { + dws->n_bytes = 1; + dws->dma_width = 1; + } else if (transfer->bits_per_word == 16) { + dws->n_bytes = 2; + dws->dma_width = 2; + } + cr0 = (transfer->bits_per_word - 1) | (chip->type << SPI_FRF_OFFSET) | (spi->mode << SPI_MODE_OFFSET) | (chip->tmode << SPI_TMOD_OFFSET); |