diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/atmel_spi.c | 17 | ||||
| -rw-r--r-- | drivers/spi/spi_s3c24xx.c | 25 |
2 files changed, 27 insertions, 15 deletions
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c index 0c716566085..95190c619c1 100644 --- a/drivers/spi/atmel_spi.c +++ b/drivers/spi/atmel_spi.c @@ -184,7 +184,8 @@ static void atmel_spi_next_xfer(struct spi_master *master, { struct atmel_spi *as = spi_master_get_devdata(master); struct spi_transfer *xfer; - u32 len, remaining, total; + u32 len, remaining; + u32 ieval; dma_addr_t tx_dma, rx_dma; if (!as->current_transfer) @@ -197,6 +198,8 @@ static void atmel_spi_next_xfer(struct spi_master *master, xfer = NULL; if (xfer) { + spi_writel(as, PTCR, SPI_BIT(RXTDIS) | SPI_BIT(TXTDIS)); + len = xfer->len; atmel_spi_next_xfer_data(master, xfer, &tx_dma, &rx_dma, &len); remaining = xfer->len - len; @@ -234,6 +237,8 @@ static void atmel_spi_next_xfer(struct spi_master *master, as->next_transfer = xfer; if (xfer) { + u32 total; + total = len; atmel_spi_next_xfer_data(master, xfer, &tx_dma, &rx_dma, &len); as->next_remaining_bytes = total - len; @@ -250,9 +255,11 @@ static void atmel_spi_next_xfer(struct spi_master *master, " next xfer %p: len %u tx %p/%08x rx %p/%08x\n", xfer, xfer->len, xfer->tx_buf, xfer->tx_dma, xfer->rx_buf, xfer->rx_dma); + ieval = SPI_BIT(ENDRX) | SPI_BIT(OVRES); } else { spi_writel(as, RNCR, 0); spi_writel(as, TNCR, 0); + ieval = SPI_BIT(RXBUFF) | SPI_BIT(ENDRX) | SPI_BIT(OVRES); } /* REVISIT: We're waiting for ENDRX before we start the next @@ -265,7 +272,7 @@ static void atmel_spi_next_xfer(struct spi_master *master, * * It should be doable, though. Just not now... */ - spi_writel(as, IER, SPI_BIT(ENDRX) | SPI_BIT(OVRES)); + spi_writel(as, IER, ieval); spi_writel(as, PTCR, SPI_BIT(TXTEN) | SPI_BIT(RXTEN)); } @@ -396,7 +403,7 @@ atmel_spi_interrupt(int irq, void *dev_id) ret = IRQ_HANDLED; - spi_writel(as, IDR, (SPI_BIT(ENDTX) | SPI_BIT(ENDRX) + spi_writel(as, IDR, (SPI_BIT(RXBUFF) | SPI_BIT(ENDRX) | SPI_BIT(OVRES))); /* @@ -418,7 +425,7 @@ atmel_spi_interrupt(int irq, void *dev_id) if (xfer->delay_usecs) udelay(xfer->delay_usecs); - dev_warn(master->dev.parent, "fifo overrun (%u/%u remaining)\n", + dev_warn(master->dev.parent, "overrun (%u/%u remaining)\n", spi_readl(as, TCR), spi_readl(as, RCR)); /* @@ -442,7 +449,7 @@ atmel_spi_interrupt(int irq, void *dev_id) spi_readl(as, SR); atmel_spi_msg_done(master, as, msg, -EIO, 0); - } else if (pending & SPI_BIT(ENDRX)) { + } else if (pending & (SPI_BIT(RXBUFF) | SPI_BIT(ENDRX))) { ret = IRQ_HANDLED; spi_writel(as, IDR, pending); diff --git a/drivers/spi/spi_s3c24xx.c b/drivers/spi/spi_s3c24xx.c index 1c643c9e1f1..21661c7959c 100644 --- a/drivers/spi/spi_s3c24xx.c +++ b/drivers/spi/spi_s3c24xx.c @@ -236,6 +236,19 @@ static irqreturn_t s3c24xx_spi_irq(int irq, void *dev) return IRQ_HANDLED; } +static void s3c24xx_spi_initialsetup(struct s3c24xx_spi *hw) +{ + /* for the moment, permanently enable the clock */ + + clk_enable(hw->clk); + + /* program defaults into the registers */ + + writeb(0xff, hw->regs + S3C2410_SPPRE); + writeb(SPPIN_DEFAULT, hw->regs + S3C2410_SPPIN); + writeb(SPCON_DEFAULT, hw->regs + S3C2410_SPCON); +} + static int __init s3c24xx_spi_probe(struct platform_device *pdev) { struct s3c2410_spi_info *pdata; @@ -327,15 +340,7 @@ static int __init s3c24xx_spi_probe(struct platform_device *pdev) goto err_no_clk; } - /* for the moment, permanently enable the clock */ - - clk_enable(hw->clk); - - /* program defaults into the registers */ - - writeb(0xff, hw->regs + S3C2410_SPPRE); - writeb(SPPIN_DEFAULT, hw->regs + S3C2410_SPPIN); - writeb(SPCON_DEFAULT, hw->regs + S3C2410_SPCON); + s3c24xx_spi_initialsetup(hw); /* setup any gpio we can */ @@ -415,7 +420,7 @@ static int s3c24xx_spi_resume(struct platform_device *pdev) { struct s3c24xx_spi *hw = platform_get_drvdata(pdev); - clk_enable(hw->clk); + s3c24xx_spi_initialsetup(hw); return 0; } |