diff options
Diffstat (limited to 'drivers/spi/spi-xilinx.c')
-rw-r--r-- | drivers/spi/spi-xilinx.c | 69 |
1 files changed, 18 insertions, 51 deletions
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index 523da73..ac94e54 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -92,8 +92,6 @@ struct xilinx_spi { u32 cs_inactive; /* Level of the CS pins when inactive*/ unsigned int (*read_fn)(void __iomem *); void (*write_fn)(u32, void __iomem *); - void (*tx_fn)(struct xilinx_spi *); - void (*rx_fn)(struct xilinx_spi *); }; static void xspi_write32(u32 val, void __iomem *addr) @@ -116,49 +114,32 @@ static unsigned int xspi_read32_be(void __iomem *addr) return ioread32be(addr); } -static void xspi_tx8(struct xilinx_spi *xspi) -{ - xspi->write_fn(*xspi->tx_ptr, xspi->regs + XSPI_TXD_OFFSET); - xspi->tx_ptr++; -} - -static void xspi_tx16(struct xilinx_spi *xspi) -{ - xspi->write_fn(*(u16 *)(xspi->tx_ptr), xspi->regs + XSPI_TXD_OFFSET); - xspi->tx_ptr += 2; -} - -static void xspi_tx32(struct xilinx_spi *xspi) +static void xilinx_spi_tx(struct xilinx_spi *xspi) { xspi->write_fn(*(u32 *)(xspi->tx_ptr), xspi->regs + XSPI_TXD_OFFSET); - xspi->tx_ptr += 4; + xspi->tx_ptr += xspi->bits_per_word / 8; } -static void xspi_rx8(struct xilinx_spi *xspi) +static void xilinx_spi_rx(struct xilinx_spi *xspi) { u32 data = xspi->read_fn(xspi->regs + XSPI_RXD_OFFSET); - if (xspi->rx_ptr) { - *xspi->rx_ptr = data & 0xff; - xspi->rx_ptr++; - } -} -static void xspi_rx16(struct xilinx_spi *xspi) -{ - u32 data = xspi->read_fn(xspi->regs + XSPI_RXD_OFFSET); - if (xspi->rx_ptr) { - *(u16 *)(xspi->rx_ptr) = data & 0xffff; - xspi->rx_ptr += 2; - } -} + if (!xspi->rx_ptr) + return; -static void xspi_rx32(struct xilinx_spi *xspi) -{ - u32 data = xspi->read_fn(xspi->regs + XSPI_RXD_OFFSET); - if (xspi->rx_ptr) { + switch (xspi->bits_per_word) { + case 8: + *(u8 *)(xspi->rx_ptr) = data; + break; + case 16: + *(u16 *)(xspi->rx_ptr) = data; + break; + case 32: *(u32 *)(xspi->rx_ptr) = data; - xspi->rx_ptr += 4; + break; } + + xspi->rx_ptr += xspi->bits_per_word / 8; } static void xspi_init_hw(struct xilinx_spi *xspi) @@ -250,7 +231,7 @@ static void xilinx_spi_fill_tx_fifo(struct xilinx_spi *xspi, int n_words) while (n_words--) if (xspi->tx_ptr) - xspi->tx_fn(xspi); + xilinx_spi_tx(xspi); else xspi->write_fn(0, xspi->regs + XSPI_TXD_OFFSET); return; @@ -301,7 +282,7 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) /* Read out all the data from the Rx FIFO */ while (n_words--) - xspi->rx_fn(xspi); + xilinx_spi_rx(xspi); } return t->len - xspi->remaining_bytes; @@ -430,20 +411,6 @@ static int xilinx_spi_probe(struct platform_device *pdev) master->bits_per_word_mask = SPI_BPW_MASK(bits_per_word); xspi->bits_per_word = bits_per_word; - if (xspi->bits_per_word == 8) { - xspi->tx_fn = xspi_tx8; - xspi->rx_fn = xspi_rx8; - } else if (xspi->bits_per_word == 16) { - xspi->tx_fn = xspi_tx16; - xspi->rx_fn = xspi_rx16; - } else if (xspi->bits_per_word == 32) { - xspi->tx_fn = xspi_tx32; - xspi->rx_fn = xspi_rx32; - } else { - ret = -EINVAL; - goto put_master; - } - xspi->buffer_size = xilinx_spi_find_buffer_size(xspi); xspi->irq = platform_get_irq(pdev, 0); |