diff options
| author | Stefan Agner <stefan.agner@toradex.com> | 2014-03-13 15:12:31 +0100 |
|---|---|---|
| committer | Stefan Agner <stefan.agner@toradex.com> | 2014-03-13 15:18:23 +0100 |
| commit | c78ce82e0e2be5745f5577f053458c12dc3b8263 (patch) | |
| tree | 66afc14c4748048fbe755b745d7fec0ec12dcf3d | |
| parent | 6ab94c27a9020de03dc6e51c7cdd98c6a343fcbc (diff) | |
dspi: fix dma for SPI1
Fix registers and channels for SPI1, however using SPI with DMA
still doesn't work (dspi_interrupt doesn't fire).
| -rw-r--r-- | drivers/spi/spi_mvf_dspi.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/drivers/spi/spi_mvf_dspi.c b/drivers/spi/spi_mvf_dspi.c index 71b85be5741b..203999285e57 100644 --- a/drivers/spi/spi_mvf_dspi.c +++ b/drivers/spi/spi_mvf_dspi.c @@ -54,8 +54,6 @@ #if defined(CONFIG_SPI_MVF_DSPI_EDMA) #define SPI_DSPI_EDMA #define EDMA_BUFSIZE_KMALLOC (DSPI_FIFO_SIZE * 4) -#define DSPI_DMA_RX_TCD DMA_MUX_DSPI0_RX -#define DSPI_DMA_TX_TCD DMA_MUX_DSPI0_TX #endif struct DSPI_MCR { @@ -310,7 +308,7 @@ static int write(struct spi_mvf_data *spi_mvf) if (tx_count > 0) { mcf_edma_set_tcd_params(spi_mvf->tx_chan, spi_mvf->edma_tx_buf_pa, - 0x4002c034, + (u32)(spi_mvf->base + SPI_PUSHR), MCF_EDMA_TCD_ATTR_SSIZE_32BIT | MCF_EDMA_TCD_ATTR_DSIZE_32BIT, 4, /* soff */ @@ -325,7 +323,7 @@ static int write(struct spi_mvf_data *spi_mvf) 0); /* enable sg */ mcf_edma_set_tcd_params(spi_mvf->rx_chan, - 0x4002c038, + (u32)(spi_mvf->base + SPI_POPR), spi_mvf->edma_rx_buf_pa, MCF_EDMA_TCD_ATTR_SSIZE_32BIT | MCF_EDMA_TCD_ATTR_DSIZE_32BIT, @@ -827,6 +825,9 @@ static int spi_mvf_probe(struct platform_device *pdev) struct spi_mvf_data *spi_mvf; struct resource *res; int ret = 0; +#if defined(SPI_DSPI_EDMA) + int rx_channel, tx_channel; +#endif int i; platform_info = dev_get_platdata(&pdev->dev); @@ -933,7 +934,23 @@ static int spi_mvf_probe(struct platform_device *pdev) spi_mvf->edma_tx_buf, spi_mvf->edma_tx_buf_pa, spi_mvf->edma_rx_buf, spi_mvf->edma_rx_buf_pa); - spi_mvf->tx_chan = mcf_edma_request_channel(DSPI_DMA_TX_TCD, + /* TODO: move this to platform data */ + switch (pdev->id) { + case 0: + rx_channel = DMA_MUX_DSPI0_RX; + tx_channel = DMA_MUX_DSPI0_TX; + break; + case 1: + rx_channel = DMA_MUX_DSPI1_RX; + tx_channel = DMA_MUX_DSPI1_TX; + break; + default: + dev_err(&pdev->dev, "unknown device id, no eDMA channels\n"); + ret = -EINVAL; + goto out_error_queue_alloc; + } + + spi_mvf->tx_chan = mcf_edma_request_channel(tx_channel, edma_tx_handler, NULL, 0x00, pdev, NULL, DRIVER_NAME); if (spi_mvf->tx_chan < 0) { dev_err(&pdev->dev, "eDMA transmit channel request\n"); @@ -946,7 +963,7 @@ static int spi_mvf_probe(struct platform_device *pdev) * by SPI communicate machnisim, i.e, is half duplex mode, that is * whether read or write, we need write data out to get we wanted. */ - spi_mvf->rx_chan = mcf_edma_request_channel(DSPI_DMA_RX_TCD, + spi_mvf->rx_chan = mcf_edma_request_channel(rx_channel, edma_rx_handler, NULL, 0x06, pdev, NULL, DRIVER_NAME); if (spi_mvf->rx_chan < 0) { dev_err(&pdev->dev, "eDAM receive channel request\n"); |