diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c index a6d9b72190ff..e311f29ffb57 100644 --- a/arch/arm/mach-davinci/dm355.c +++ b/arch/arm/mach-davinci/dm355.c @@ -413,7 +413,6 @@ static struct davinci_spi_platform_data dm355_spi0_pdata = { .version = SPI_VERSION_1, .num_chipselect = 2, .clk_internal = 1, - .poll_mode = 1, /* 0 -> interrupt mode 1-> polling mode */ }; static struct platform_device dm355_spi0_device = { .name = "spi_davinci", diff --git a/arch/arm/mach-davinci/dm365.c b/arch/arm/mach-davinci/dm365.c index 80dd159134cb..1e5012e196ba 100644 --- a/arch/arm/mach-davinci/dm365.c +++ b/arch/arm/mach-davinci/dm365.c @@ -626,7 +626,6 @@ static struct davinci_spi_platform_data dm365_spi0_pdata = { .version = SPI_VERSION_1, .num_chipselect = 2, .clk_internal = 1, - .poll_mode = 1, /* 0 -> interrupt mode 1-> polling mode */ }; static struct resource dm365_spi0_resources[] = { diff --git a/arch/arm/mach-davinci/include/mach/spi.h b/arch/arm/mach-davinci/include/mach/spi.h index 483b055da440..e68afe23885b 100644 --- a/arch/arm/mach-davinci/include/mach/spi.h +++ b/arch/arm/mach-davinci/include/mach/spi.h @@ -30,8 +30,6 @@ struct davinci_spi_platform_data { u8 version; u8 num_chipselect; u8 clk_internal; - u8 intr_level; - u8 poll_mode; u8 use_dma; u8 *chip_sel; }; diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c index 54d06f409b65..198f062da370 100644 --- a/drivers/spi/davinci_spi.c +++ b/drivers/spi/davinci_spi.c @@ -59,8 +59,6 @@ #define SPIPC0_SPIENA_MASK BIT(8) /* nREADY */ #define SPIINT_MASKALL 0x0101035F -#define SPI_INTLVL_1 0x000001FFu -#define SPI_INTLVL_0 0x00000000u /* SPIDAT1 (upper 16 bit defines) */ #define SPIDAT1_CSHOLD_MASK BIT(12) @@ -92,14 +90,8 @@ #define SPIFLG_DESYNC_MASK BIT(3) #define SPIFLG_BITERR_MASK BIT(4) #define SPIFLG_OVRRUN_MASK BIT(6) -#define SPIFLG_RX_INTR_MASK BIT(8) -#define SPIFLG_TX_INTR_MASK BIT(9) #define SPIFLG_BUF_INIT_ACTIVE_MASK BIT(24) -#define SPIINT_BITERR_INTR BIT(4) -#define SPIINT_OVRRUN_INTR BIT(6) -#define SPIINT_RX_INTR BIT(8) -#define SPIINT_TX_INTR BIT(9) #define SPIINT_DMA_REQ_EN BIT(16) /* SPI Controller registers */ @@ -136,8 +128,6 @@ struct davinci_spi { resource_size_t pbase; void __iomem *base; size_t region_size; - u32 irq; - struct completion done; const void *tx; void *rx; @@ -611,7 +601,7 @@ static int davinci_spi_check_error(struct davinci_spi *davinci_spi, static int davinci_spi_bufs_pio(struct spi_device *spi, struct spi_transfer *t) { struct davinci_spi *davinci_spi; - int int_status, count, ret; + int status, count, ret; u8 conv; u32 tx_data, data1_reg_val; u32 buf_val, flg_val; @@ -627,8 +617,6 @@ static int davinci_spi_bufs_pio(struct spi_device *spi, struct spi_transfer *t) conv = davinci_spi->bytes_per_word[spi->chip_select]; data1_reg_val = ioread32(davinci_spi->base + SPIDAT1); - INIT_COMPLETION(davinci_spi->done); - ret = davinci_spi_bufs_prep(spi, davinci_spi); if (ret) return ret; @@ -638,9 +626,10 @@ static int davinci_spi_bufs_pio(struct spi_device *spi, struct spi_transfer *t) count = t->len / conv; + clear_io_bits(davinci_spi->base + SPIINT, SPIINT_MASKALL); + /* Determine the command to execute READ or WRITE */ if (t->tx_buf) { - clear_io_bits(davinci_spi->base + SPIINT, SPIINT_MASKALL); while (1) { tx_data = davinci_spi->get_tx(davinci_spi); @@ -668,45 +657,25 @@ static int davinci_spi_bufs_pio(struct spi_device *spi, struct spi_transfer *t) break; } } else { - if (pdata->poll_mode) { - while (1) { - /* keeps the serial clock going */ - if ((ioread32(davinci_spi->base + SPIBUF) - & SPIBUF_TXFULL_MASK) == 0) - iowrite32(data1_reg_val, - davinci_spi->base + SPIDAT1); + while (1) { + /* keeps the serial clock going */ + if ((ioread32(davinci_spi->base + SPIBUF) + & SPIBUF_TXFULL_MASK) == 0) + iowrite32(data1_reg_val, + davinci_spi->base + SPIDAT1); while (ioread32(davinci_spi->base + SPIBUF) & - SPIBUF_RXEMPTY_MASK) + SPIBUF_RXEMPTY_MASK) cpu_relax(); - flg_val = ioread32(davinci_spi->base + SPIFLG); - buf_val = ioread32(davinci_spi->base + SPIBUF); + flg_val = ioread32(davinci_spi->base + SPIFLG); + buf_val = ioread32(davinci_spi->base + SPIBUF); - davinci_spi->get_rx(buf_val, davinci_spi); + davinci_spi->get_rx(buf_val, davinci_spi); - count--; - if (count <= 0) - break; - } - } else { /* Receive in Interrupt mode */ - int i; - - for (i = 0; i < count; i++) { - set_io_bits(davinci_spi->base + SPIINT, - SPIINT_BITERR_INTR - | SPIINT_OVRRUN_INTR - | SPIINT_RX_INTR); - - iowrite32(data1_reg_val, - davinci_spi->base + SPIDAT1); - - while (ioread32(davinci_spi->base + SPIINT) & - SPIINT_RX_INTR) - cpu_relax(); - } - iowrite32((data1_reg_val & 0x0ffcffff), - davinci_spi->base + SPIDAT1); + count--; + if (count <= 0) + break; } } @@ -714,9 +683,9 @@ static int davinci_spi_bufs_pio(struct spi_device *spi, struct spi_transfer *t) * Check for bit error, desync error,parity error,timeout error and * receive overflow errors */ - int_status = ioread32(davinci_spi->base + SPIFLG); + status = ioread32(davinci_spi->base + SPIFLG); - ret = davinci_spi_check_error(davinci_spi, int_status); + ret = davinci_spi_check_error(davinci_spi, status); if (ret != 0) return ret; @@ -853,38 +822,6 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t) return t->len; } -/** - * davinci_spi_irq - IRQ handler for DaVinci SPI - * @irq: IRQ number for this SPI Master - * @context_data: structure for SPI Master controller davinci_spi - */ -static irqreturn_t davinci_spi_irq(s32 irq, void *context_data) -{ - struct davinci_spi *davinci_spi = context_data; - u32 int_status, rx_data = 0; - irqreturn_t ret = IRQ_NONE; - - int_status = ioread32(davinci_spi->base + SPIFLG); - - while ((int_status & SPIFLG_RX_INTR_MASK)) { - if (likely(int_status & SPIFLG_RX_INTR_MASK)) { - ret = IRQ_HANDLED; - - rx_data = ioread32(davinci_spi->base + SPIBUF); - davinci_spi->get_rx(rx_data, davinci_spi); - - /* Disable Receive Interrupt */ - iowrite32(~(SPIINT_RX_INTR | SPIINT_TX_INTR), - davinci_spi->base + SPIINT); - } else - (void)davinci_spi_check_error(davinci_spi, int_status); - - int_status = ioread32(davinci_spi->base + SPIFLG); - } - - return ret; -} - /** * davinci_spi_probe - probe function for SPI Master Controller * @pdev: platform_device structure which contains plateform specific data @@ -943,22 +880,11 @@ static int davinci_spi_probe(struct platform_device *pdev) goto release_region; } - davinci_spi->irq = platform_get_irq(pdev, 0); - if (davinci_spi->irq <= 0) { - ret = -EINVAL; - goto unmap_io; - } - - ret = request_irq(davinci_spi->irq, davinci_spi_irq, IRQF_DISABLED, - dev_name(&pdev->dev), davinci_spi); - if (ret) - goto unmap_io; - /* Allocate tmp_buf for tx_buf */ davinci_spi->tmp_buf = kzalloc(SPI_BUFSIZ, GFP_KERNEL); if (davinci_spi->tmp_buf == NULL) { ret = -ENOMEM; - goto irq_free; + goto unmap_io; } davinci_spi->bitbang.master = spi_master_get(master); @@ -1034,8 +960,6 @@ static int davinci_spi_probe(struct platform_device *pdev) davinci_spi->get_rx = davinci_spi_rx_buf_u8; davinci_spi->get_tx = davinci_spi_tx_buf_u8; - init_completion(&davinci_spi->done); - /* Reset In/OUT SPI module */ iowrite32(0, davinci_spi->base + SPIGCR0); udelay(100); @@ -1062,21 +986,12 @@ static int davinci_spi_probe(struct platform_device *pdev) /* master mode default */ set_io_bits(davinci_spi->base + SPIGCR1, SPIGCR1_MASTER_MASK); - if (davinci_spi->pdata->intr_level) - iowrite32(SPI_INTLVL_1, davinci_spi->base + SPILVL); - else - iowrite32(SPI_INTLVL_0, davinci_spi->base + SPILVL); - ret = spi_bitbang_start(&davinci_spi->bitbang); if (ret) goto free_clk; dev_info(&pdev->dev, "Controller at 0x%p\n", davinci_spi->base); - if (!pdata->poll_mode) - dev_info(&pdev->dev, "Operating in interrupt mode" - " using IRQ %d\n", davinci_spi->irq); - return ret; free_clk: @@ -1086,8 +1001,6 @@ put_master: spi_master_put(master); free_tmp_buf: kfree(davinci_spi->tmp_buf); -irq_free: - free_irq(davinci_spi->irq, davinci_spi); unmap_io: iounmap(davinci_spi->base); release_region: @@ -1121,7 +1034,6 @@ static int __exit davinci_spi_remove(struct platform_device *pdev) clk_put(davinci_spi->clk); spi_master_put(master); kfree(davinci_spi->tmp_buf); - free_irq(davinci_spi->irq, davinci_spi); iounmap(davinci_spi->base); release_mem_region(davinci_spi->pbase, davinci_spi->region_size);