diff options
Diffstat (limited to 'drivers/spi/spi-sirf.c')
| -rw-r--r-- | drivers/spi/spi-sirf.c | 51 |
1 files changed, 32 insertions, 19 deletions
diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c index 67d8909..3c12f39 100644 --- a/drivers/spi/spi-sirf.c +++ b/drivers/spi/spi-sirf.c @@ -382,14 +382,16 @@ static int spi_sirfsoc_transfer(struct spi_device *spi, struct spi_transfer *t) if (IS_DMA_VALID(t)) { struct dma_async_tx_descriptor *rx_desc, *tx_desc; - sspi->dst_start = dma_map_single(&spi->dev, sspi->rx, t->len, DMA_FROM_DEVICE); + sspi->dst_start = dma_map_single(&spi->dev, + sspi->rx, t->len, DMA_FROM_DEVICE); rx_desc = dmaengine_prep_slave_single(sspi->rx_chan, sspi->dst_start, t->len, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); rx_desc->callback = spi_sirfsoc_dma_fini_callback; rx_desc->callback_param = &sspi->rx_done; - sspi->src_start = dma_map_single(&spi->dev, (void *)sspi->tx, t->len, DMA_TO_DEVICE); + sspi->src_start = dma_map_single(&spi->dev, + (void *)sspi->tx, t->len, DMA_TO_DEVICE); tx_desc = dmaengine_prep_slave_single(sspi->tx_chan, sspi->src_start, t->len, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); @@ -404,13 +406,18 @@ static int spi_sirfsoc_transfer(struct spi_device *spi, struct spi_transfer *t) /* Send the first word to trigger the whole tx/rx process */ sspi->tx_word(sspi); - writel(SIRFSOC_SPI_RX_OFLOW_INT_EN | SIRFSOC_SPI_TX_UFLOW_INT_EN | - SIRFSOC_SPI_RXFIFO_THD_INT_EN | SIRFSOC_SPI_TXFIFO_THD_INT_EN | - SIRFSOC_SPI_FRM_END_INT_EN | SIRFSOC_SPI_RXFIFO_FULL_INT_EN | - SIRFSOC_SPI_TXFIFO_EMPTY_INT_EN, sspi->base + SIRFSOC_SPI_INT_EN); + writel(SIRFSOC_SPI_RX_OFLOW_INT_EN | + SIRFSOC_SPI_TX_UFLOW_INT_EN | + SIRFSOC_SPI_RXFIFO_THD_INT_EN | + SIRFSOC_SPI_TXFIFO_THD_INT_EN | + SIRFSOC_SPI_FRM_END_INT_EN | + SIRFSOC_SPI_RXFIFO_FULL_INT_EN | + SIRFSOC_SPI_TXFIFO_EMPTY_INT_EN, + sspi->base + SIRFSOC_SPI_INT_EN); } - writel(SIRFSOC_SPI_RX_EN | SIRFSOC_SPI_TX_EN, sspi->base + SIRFSOC_SPI_TX_RX_EN); + writel(SIRFSOC_SPI_RX_EN | SIRFSOC_SPI_TX_EN, + sspi->base + SIRFSOC_SPI_TX_RX_EN); if (!IS_DMA_VALID(t)) { /* for PIO */ if (wait_for_completion_timeout(&sspi->rx_done, timeout) == 0) @@ -434,8 +441,10 @@ static int spi_sirfsoc_transfer(struct spi_device *spi, struct spi_transfer *t) } if (IS_DMA_VALID(t)) { - dma_unmap_single(&spi->dev, sspi->src_start, t->len, DMA_TO_DEVICE); - dma_unmap_single(&spi->dev, sspi->dst_start, t->len, DMA_FROM_DEVICE); + dma_unmap_single(&spi->dev, + sspi->src_start, t->len, DMA_TO_DEVICE); + dma_unmap_single(&spi->dev, + sspi->dst_start, t->len, DMA_FROM_DEVICE); } /* TX, RX FIFO stop */ @@ -512,7 +521,8 @@ spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t) break; case 12: case 16: - regval |= (bits_per_word == 12) ? SIRFSOC_SPI_TRAN_DAT_FORMAT_12 : + regval |= (bits_per_word == 12) ? + SIRFSOC_SPI_TRAN_DAT_FORMAT_12 : SIRFSOC_SPI_TRAN_DAT_FORMAT_16; sspi->rx_word = spi_sirfsoc_rx_word_u16; sspi->tx_word = spi_sirfsoc_tx_word_u16; @@ -540,8 +550,8 @@ spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t) regval |= SIRFSOC_SPI_CLK_IDLE_STAT; /* - * Data should be driven at least 1/2 cycle before the fetch edge to make - * sure that data gets stable at the fetch edge. + * Data should be driven at least 1/2 cycle before the fetch edge + * to make sure that data gets stable at the fetch edge. */ if (((spi->mode & SPI_CPOL) && (spi->mode & SPI_CPHA)) || (!(spi->mode & SPI_CPOL) && !(spi->mode & SPI_CPHA))) @@ -578,11 +588,14 @@ spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t) if (IS_DMA_VALID(t)) { /* Enable DMA mode for RX, TX */ writel(0, sspi->base + SIRFSOC_SPI_TX_DMA_IO_CTRL); - writel(SIRFSOC_SPI_RX_DMA_FLUSH, sspi->base + SIRFSOC_SPI_RX_DMA_IO_CTRL); + writel(SIRFSOC_SPI_RX_DMA_FLUSH, + sspi->base + SIRFSOC_SPI_RX_DMA_IO_CTRL); } else { /* Enable IO mode for RX, TX */ - writel(SIRFSOC_SPI_IO_MODE_SEL, sspi->base + SIRFSOC_SPI_TX_DMA_IO_CTRL); - writel(SIRFSOC_SPI_IO_MODE_SEL, sspi->base + SIRFSOC_SPI_RX_DMA_IO_CTRL); + writel(SIRFSOC_SPI_IO_MODE_SEL, + sspi->base + SIRFSOC_SPI_TX_DMA_IO_CTRL); + writel(SIRFSOC_SPI_IO_MODE_SEL, + sspi->base + SIRFSOC_SPI_RX_DMA_IO_CTRL); } return 0; @@ -612,7 +625,8 @@ static int spi_sirfsoc_probe(struct platform_device *pdev) goto err_cs; } - master = spi_alloc_master(&pdev->dev, sizeof(*sspi) + sizeof(int) * num_cs); + master = spi_alloc_master(&pdev->dev, + sizeof(*sspi) + sizeof(int) * num_cs); if (!master) { dev_err(&pdev->dev, "Unable to allocate SPI master\n"); return -ENOMEM; @@ -808,8 +822,7 @@ static struct platform_driver spi_sirfsoc_driver = { .remove = spi_sirfsoc_remove, }; module_platform_driver(spi_sirfsoc_driver); - MODULE_DESCRIPTION("SiRF SoC SPI master driver"); -MODULE_AUTHOR("Zhiwu Song <Zhiwu.Song@csr.com>, " - "Barry Song <Baohua.Song@csr.com>"); +MODULE_AUTHOR("Zhiwu Song <Zhiwu.Song@csr.com>"); +MODULE_AUTHOR("Barry Song <Baohua.Song@csr.com>"); MODULE_LICENSE("GPL v2"); |
