diff options
Diffstat (limited to 'drivers/spi/spi-fsl-dspi.c')
| -rw-r--r-- | drivers/spi/spi-fsl-dspi.c | 48 |
1 files changed, 28 insertions, 20 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 021c658886d4..55ccb3d0f683 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -20,13 +20,6 @@ #define DRIVER_NAME "fsl-dspi" -#ifdef CONFIG_M5441x -#define DSPI_FIFO_SIZE 16 -#else -#define DSPI_FIFO_SIZE 4 -#endif -#define DSPI_DMA_BUFSIZE (DSPI_FIFO_SIZE * 1024) - #define SPI_MCR 0x00 #define SPI_MCR_MASTER BIT(31) #define SPI_MCR_PCSIS (0x3F << 16) @@ -131,6 +124,8 @@ struct fsl_dspi_devtype_data { u8 max_clock_factor; bool ptp_sts_supported; bool xspi_mode; + int fifo_size; + int dma_bufsize; }; enum { @@ -149,54 +144,64 @@ static const struct fsl_dspi_devtype_data devtype_data[] = { [VF610] = { .trans_mode = DSPI_DMA_MODE, .max_clock_factor = 2, + .dma_bufsize = 4096, + .fifo_size = 4, }, [LS1021A] = { .trans_mode = DSPI_TCFQ_MODE, .max_clock_factor = 8, .ptp_sts_supported = true, .xspi_mode = true, + .fifo_size = 4, }, [LS1012A] = { .trans_mode = DSPI_TCFQ_MODE, .max_clock_factor = 8, .ptp_sts_supported = true, .xspi_mode = true, + .fifo_size = 16, }, [LS1043A] = { .trans_mode = DSPI_TCFQ_MODE, .max_clock_factor = 8, .ptp_sts_supported = true, .xspi_mode = true, + .fifo_size = 16, }, [LS1046A] = { .trans_mode = DSPI_TCFQ_MODE, .max_clock_factor = 8, .ptp_sts_supported = true, .xspi_mode = true, + .fifo_size = 16, }, [LS2080A] = { .trans_mode = DSPI_TCFQ_MODE, .max_clock_factor = 8, .ptp_sts_supported = true, + .fifo_size = 4, }, [LS2085A] = { .trans_mode = DSPI_TCFQ_MODE, .max_clock_factor = 8, .ptp_sts_supported = true, + .fifo_size = 4, }, [LX2160A] = { .trans_mode = DSPI_TCFQ_MODE, .max_clock_factor = 8, .ptp_sts_supported = true, + .fifo_size = 4, }, [MCF5441X] = { .trans_mode = DSPI_EOQ_MODE, .max_clock_factor = 8, + .fifo_size = 16, }, }; struct fsl_dspi_dma { - /* Length of transfer in words of DSPI_FIFO_SIZE */ + /* Length of transfer in words of dspi->fifo_size */ u32 curr_xfer_len; u32 *tx_dma_buf; @@ -397,7 +402,8 @@ static int dspi_dma_xfer(struct fsl_dspi *dspi) int ret = 0; curr_remaining_bytes = dspi->len; - bytes_per_buffer = DSPI_DMA_BUFSIZE / DSPI_FIFO_SIZE; + bytes_per_buffer = dspi->devtype_data->dma_bufsize / + dspi->devtype_data->fifo_size; while (curr_remaining_bytes) { /* Check if current transfer fits the DMA buffer */ dma->curr_xfer_len = curr_remaining_bytes @@ -449,14 +455,14 @@ static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr) goto err_tx_channel; } - dma->tx_dma_buf = dma_alloc_coherent(dev, DSPI_DMA_BUFSIZE, + dma->tx_dma_buf = dma_alloc_coherent(dev, dspi->devtype_data->dma_bufsize, &dma->tx_dma_phys, GFP_KERNEL); if (!dma->tx_dma_buf) { ret = -ENOMEM; goto err_tx_dma_buf; } - dma->rx_dma_buf = dma_alloc_coherent(dev, DSPI_DMA_BUFSIZE, + dma->rx_dma_buf = dma_alloc_coherent(dev, dspi->devtype_data->dma_bufsize, &dma->rx_dma_phys, GFP_KERNEL); if (!dma->rx_dma_buf) { ret = -ENOMEM; @@ -493,11 +499,11 @@ static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr) return 0; err_slave_config: - dma_free_coherent(dev, DSPI_DMA_BUFSIZE, - dma->rx_dma_buf, dma->rx_dma_phys); + dma_free_coherent(dev, dspi->devtype_data->dma_bufsize, + dma->rx_dma_buf, dma->rx_dma_phys); err_rx_dma_buf: - dma_free_coherent(dev, DSPI_DMA_BUFSIZE, - dma->tx_dma_buf, dma->tx_dma_phys); + dma_free_coherent(dev, dspi->devtype_data->dma_bufsize, + dma->tx_dma_buf, dma->tx_dma_phys); err_tx_dma_buf: dma_release_channel(dma->chan_tx); err_tx_channel: @@ -519,13 +525,15 @@ static void dspi_release_dma(struct fsl_dspi *dspi) if (dma->chan_tx) { dma_unmap_single(dev, dma->tx_dma_phys, - DSPI_DMA_BUFSIZE, DMA_TO_DEVICE); + dspi->devtype_data->dma_bufsize, + DMA_TO_DEVICE); dma_release_channel(dma->chan_tx); } if (dma->chan_rx) { dma_unmap_single(dev, dma->rx_dma_phys, - DSPI_DMA_BUFSIZE, DMA_FROM_DEVICE); + dspi->devtype_data->dma_bufsize, + DMA_FROM_DEVICE); dma_release_channel(dma->chan_rx); } } @@ -657,7 +665,7 @@ static void dspi_tcfq_read(struct fsl_dspi *dspi) static void dspi_eoq_write(struct fsl_dspi *dspi) { - int fifo_size = DSPI_FIFO_SIZE; + int fifo_size = dspi->devtype_data->fifo_size; u16 xfer_cmd = dspi->tx_cmd; /* Fill TX FIFO with as many transfers as possible */ @@ -667,7 +675,7 @@ static void dspi_eoq_write(struct fsl_dspi *dspi) if (dspi->len == dspi->bytes_per_word || fifo_size == 0) dspi->tx_cmd |= SPI_PUSHR_CMD_EOQ; /* Clear transfer count for first transfer in FIFO */ - if (fifo_size == (DSPI_FIFO_SIZE - 1)) + if (fifo_size == (dspi->devtype_data->fifo_size - 1)) dspi->tx_cmd |= SPI_PUSHR_CMD_CTCNT; /* Write combined TX FIFO and CMD FIFO entry */ fifo_write(dspi); @@ -676,7 +684,7 @@ static void dspi_eoq_write(struct fsl_dspi *dspi) static void dspi_eoq_read(struct fsl_dspi *dspi) { - int fifo_size = DSPI_FIFO_SIZE; + int fifo_size = dspi->devtype_data->fifo_size; /* Read one FIFO entry and push to rx buffer */ while ((dspi->rx < dspi->rx_end) && fifo_size--) |